Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd

[karo-tx-linux.git] / drivers / scsi / lpfc / lpfc_sli.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2009 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/delay.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/fc/fc_fs.h>
#include <linux/aer.h>

#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_crtn.h"
#include "lpfc_logmsg.h"
#include "lpfc_compat.h"
#include "lpfc_debugfs.h"
#include "lpfc_vport.h"

/* There are only four IOCB completion types. */
typedef enum _lpfc_iocb_type {
        LPFC_UNKNOWN_IOCB,
        LPFC_UNSOL_IOCB,
        LPFC_SOL_IOCB,
        LPFC_ABORT_IOCB
} lpfc_iocb_type;


/* Provide function prototypes local to this module. */
static int lpfc_sli_issue_mbox_s4(struct lpfc_hba *, LPFC_MBOXQ_t *,
                                  uint32_t);
static int lpfc_sli4_read_rev(struct lpfc_hba *, LPFC_MBOXQ_t *,
                              uint8_t *, uint32_t *);
static struct lpfc_iocbq *lpfc_sli4_els_wcqe_to_rspiocbq(struct lpfc_hba *,
                                                         struct lpfc_iocbq *);
static void lpfc_sli4_send_seq_to_ulp(struct lpfc_vport *,
                                      struct hbq_dmabuf *);
static IOCB_t *
lpfc_get_iocb_from_iocbq(struct lpfc_iocbq *iocbq)
{
        return &iocbq->iocb;
}

/**
 * lpfc_sli4_wq_put - Put a Work Queue Entry on an Work Queue
 * @q: The Work Queue to operate on.
 * @wqe: The work Queue Entry to put on the Work queue.
 *
 * This routine will copy the contents of @wqe to the next available entry on
 * the @q. This function will then ring the Work Queue Doorbell to signal the
 * HBA to start processing the Work Queue Entry. This function returns 0 if
 * successful. If no entries are available on @q then this function will return
 * -ENOMEM.
 * The caller is expected to hold the hbalock when calling this routine.
 **/
static uint32_t
lpfc_sli4_wq_put(struct lpfc_queue *q, union lpfc_wqe *wqe)
{
        union lpfc_wqe *temp_wqe = q->qe[q->host_index].wqe;
        struct lpfc_register doorbell;
        uint32_t host_index;

        /* If the host has not yet processed the next entry then we are done */
        if (((q->host_index + 1) % q->entry_count) == q->hba_index)
                return -ENOMEM;
        /* set consumption flag every once in a while */
        if (!((q->host_index + 1) % LPFC_RELEASE_NOTIFICATION_INTERVAL))
                bf_set(lpfc_wqe_gen_wqec, &wqe->generic, 1);

        lpfc_sli_pcimem_bcopy(wqe, temp_wqe, q->entry_size);

        /* Update the host index before invoking device */
        host_index = q->host_index;
        q->host_index = ((q->host_index + 1) % q->entry_count);

        /* Ring Doorbell */
        doorbell.word0 = 0;
        bf_set(lpfc_wq_doorbell_num_posted, &doorbell, 1);
        bf_set(lpfc_wq_doorbell_index, &doorbell, host_index);
        bf_set(lpfc_wq_doorbell_id, &doorbell, q->queue_id);
        writel(doorbell.word0, q->phba->sli4_hba.WQDBregaddr);
        readl(q->phba->sli4_hba.WQDBregaddr); /* Flush */

        return 0;
}

/**
 * lpfc_sli4_wq_release - Updates internal hba index for WQ
 * @q: The Work Queue to operate on.
 * @index: The index to advance the hba index to.
 *
 * This routine will update the HBA index of a queue to reflect consumption of
 * Work Queue Entries by the HBA. When the HBA indicates that it has consumed
 * an entry the host calls this function to update the queue's internal
 * pointers. This routine returns the number of entries that were consumed by
 * the HBA.
 **/
static uint32_t
lpfc_sli4_wq_release(struct lpfc_queue *q, uint32_t index)
{
        uint32_t released = 0;

        if (q->hba_index == index)
                return 0;
        do {
                q->hba_index = ((q->hba_index + 1) % q->entry_count);
                released++;
        } while (q->hba_index != index);
        return released;
}

/**
 * lpfc_sli4_mq_put - Put a Mailbox Queue Entry on an Mailbox Queue
 * @q: The Mailbox Queue to operate on.
 * @wqe: The Mailbox Queue Entry to put on the Work queue.
 *
 * This routine will copy the contents of @mqe to the next available entry on
 * the @q. This function will then ring the Work Queue Doorbell to signal the
 * HBA to start processing the Work Queue Entry. This function returns 0 if
 * successful. If no entries are available on @q then this function will return
 * -ENOMEM.
 * The caller is expected to hold the hbalock when calling this routine.
 **/
static uint32_t
lpfc_sli4_mq_put(struct lpfc_queue *q, struct lpfc_mqe *mqe)
{
        struct lpfc_mqe *temp_mqe = q->qe[q->host_index].mqe;
        struct lpfc_register doorbell;
        uint32_t host_index;

        /* If the host has not yet processed the next entry then we are done */
        if (((q->host_index + 1) % q->entry_count) == q->hba_index)
                return -ENOMEM;
        lpfc_sli_pcimem_bcopy(mqe, temp_mqe, q->entry_size);
        /* Save off the mailbox pointer for completion */
        q->phba->mbox = (MAILBOX_t *)temp_mqe;

        /* Update the host index before invoking device */
        host_index = q->host_index;
        q->host_index = ((q->host_index + 1) % q->entry_count);

        /* Ring Doorbell */
        doorbell.word0 = 0;
        bf_set(lpfc_mq_doorbell_num_posted, &doorbell, 1);
        bf_set(lpfc_mq_doorbell_id, &doorbell, q->queue_id);
        writel(doorbell.word0, q->phba->sli4_hba.MQDBregaddr);
        readl(q->phba->sli4_hba.MQDBregaddr); /* Flush */
        return 0;
}

/**
 * lpfc_sli4_mq_release - Updates internal hba index for MQ
 * @q: The Mailbox Queue to operate on.
 *
 * This routine will update the HBA index of a queue to reflect consumption of
 * a Mailbox Queue Entry by the HBA. When the HBA indicates that it has consumed
 * an entry the host calls this function to update the queue's internal
 * pointers. This routine returns the number of entries that were consumed by
 * the HBA.
 **/
static uint32_t
lpfc_sli4_mq_release(struct lpfc_queue *q)
{
        /* Clear the mailbox pointer for completion */
        q->phba->mbox = NULL;
        q->hba_index = ((q->hba_index + 1) % q->entry_count);
        return 1;
}

/**
 * lpfc_sli4_eq_get - Gets the next valid EQE from a EQ
 * @q: The Event Queue to get the first valid EQE from
 *
 * This routine will get the first valid Event Queue Entry from @q, update
 * the queue's internal hba index, and return the EQE. If no valid EQEs are in
 * the Queue (no more work to do), or the Queue is full of EQEs that have been
 * processed, but not popped back to the HBA then this routine will return NULL.
 **/
static struct lpfc_eqe *
lpfc_sli4_eq_get(struct lpfc_queue *q)
{
        struct lpfc_eqe *eqe = q->qe[q->hba_index].eqe;

        /* If the next EQE is not valid then we are done */
        if (!bf_get(lpfc_eqe_valid, eqe))
                return NULL;
        /* If the host has not yet processed the next entry then we are done */
        if (((q->hba_index + 1) % q->entry_count) == q->host_index)
                return NULL;

        q->hba_index = ((q->hba_index + 1) % q->entry_count);
        return eqe;
}

/**
 * lpfc_sli4_eq_release - Indicates the host has finished processing an EQ
 * @q: The Event Queue that the host has completed processing for.
 * @arm: Indicates whether the host wants to arms this CQ.
 *
 * This routine will mark all Event Queue Entries on @q, from the last
 * known completed entry to the last entry that was processed, as completed
 * by clearing the valid bit for each completion queue entry. Then it will
 * notify the HBA, by ringing the doorbell, that the EQEs have been processed.
 * The internal host index in the @q will be updated by this routine to indicate
 * that the host has finished processing the entries. The @arm parameter
 * indicates that the queue should be rearmed when ringing the doorbell.
 *
 * This function will return the number of EQEs that were popped.
 **/
uint32_t
lpfc_sli4_eq_release(struct lpfc_queue *q, bool arm)
{
        uint32_t released = 0;
        struct lpfc_eqe *temp_eqe;
        struct lpfc_register doorbell;

        /* while there are valid entries */
        while (q->hba_index != q->host_index) {
                temp_eqe = q->qe[q->host_index].eqe;
                bf_set(lpfc_eqe_valid, temp_eqe, 0);
                released++;
                q->host_index = ((q->host_index + 1) % q->entry_count);
        }
        if (unlikely(released == 0 && !arm))
                return 0;

        /* ring doorbell for number popped */
        doorbell.word0 = 0;
        if (arm) {
                bf_set(lpfc_eqcq_doorbell_arm, &doorbell, 1);
                bf_set(lpfc_eqcq_doorbell_eqci, &doorbell, 1);
        }
        bf_set(lpfc_eqcq_doorbell_num_released, &doorbell, released);
        bf_set(lpfc_eqcq_doorbell_qt, &doorbell, LPFC_QUEUE_TYPE_EVENT);
        bf_set(lpfc_eqcq_doorbell_eqid, &doorbell, q->queue_id);
        writel(doorbell.word0, q->phba->sli4_hba.EQCQDBregaddr);
        /* PCI read to flush PCI pipeline on re-arming for INTx mode */
        if ((q->phba->intr_type == INTx) && (arm == LPFC_QUEUE_REARM))
                readl(q->phba->sli4_hba.EQCQDBregaddr);
        return released;
}

/**
 * lpfc_sli4_cq_get - Gets the next valid CQE from a CQ
 * @q: The Completion Queue to get the first valid CQE from
 *
 * This routine will get the first valid Completion Queue Entry from @q, update
 * the queue's internal hba index, and return the CQE. If no valid CQEs are in
 * the Queue (no more work to do), or the Queue is full of CQEs that have been
 * processed, but not popped back to the HBA then this routine will return NULL.
 **/
static struct lpfc_cqe *
lpfc_sli4_cq_get(struct lpfc_queue *q)
{
        struct lpfc_cqe *cqe;

        /* If the next CQE is not valid then we are done */
        if (!bf_get(lpfc_cqe_valid, q->qe[q->hba_index].cqe))
                return NULL;
        /* If the host has not yet processed the next entry then we are done */
        if (((q->hba_index + 1) % q->entry_count) == q->host_index)
                return NULL;

        cqe = q->qe[q->hba_index].cqe;
        q->hba_index = ((q->hba_index + 1) % q->entry_count);
        return cqe;
}

/**
 * lpfc_sli4_cq_release - Indicates the host has finished processing a CQ
 * @q: The Completion Queue that the host has completed processing for.
 * @arm: Indicates whether the host wants to arms this CQ.
 *
 * This routine will mark all Completion queue entries on @q, from the last
 * known completed entry to the last entry that was processed, as completed
 * by clearing the valid bit for each completion queue entry. Then it will
 * notify the HBA, by ringing the doorbell, that the CQEs have been processed.
 * The internal host index in the @q will be updated by this routine to indicate
 * that the host has finished processing the entries. The @arm parameter
 * indicates that the queue should be rearmed when ringing the doorbell.
 *
 * This function will return the number of CQEs that were released.
 **/
uint32_t
lpfc_sli4_cq_release(struct lpfc_queue *q, bool arm)
{
        uint32_t released = 0;
        struct lpfc_cqe *temp_qe;
        struct lpfc_register doorbell;

        /* while there are valid entries */
        while (q->hba_index != q->host_index) {
                temp_qe = q->qe[q->host_index].cqe;
                bf_set(lpfc_cqe_valid, temp_qe, 0);
                released++;
                q->host_index = ((q->host_index + 1) % q->entry_count);
        }
        if (unlikely(released == 0 && !arm))
                return 0;

        /* ring doorbell for number popped */
        doorbell.word0 = 0;
        if (arm)
                bf_set(lpfc_eqcq_doorbell_arm, &doorbell, 1);
        bf_set(lpfc_eqcq_doorbell_num_released, &doorbell, released);
        bf_set(lpfc_eqcq_doorbell_qt, &doorbell, LPFC_QUEUE_TYPE_COMPLETION);
        bf_set(lpfc_eqcq_doorbell_cqid, &doorbell, q->queue_id);
        writel(doorbell.word0, q->phba->sli4_hba.EQCQDBregaddr);
        return released;
}

/**
 * lpfc_sli4_rq_put - Put a Receive Buffer Queue Entry on a Receive Queue
 * @q: The Header Receive Queue to operate on.
 * @wqe: The Receive Queue Entry to put on the Receive queue.
 *
 * This routine will copy the contents of @wqe to the next available entry on
 * the @q. This function will then ring the Receive Queue Doorbell to signal the
 * HBA to start processing the Receive Queue Entry. This function returns the
 * index that the rqe was copied to if successful. If no entries are available
 * on @q then this function will return -ENOMEM.
 * The caller is expected to hold the hbalock when calling this routine.
 **/
static int
lpfc_sli4_rq_put(struct lpfc_queue *hq, struct lpfc_queue *dq,
                 struct lpfc_rqe *hrqe, struct lpfc_rqe *drqe)
{
        struct lpfc_rqe *temp_hrqe = hq->qe[hq->host_index].rqe;
        struct lpfc_rqe *temp_drqe = dq->qe[dq->host_index].rqe;
        struct lpfc_register doorbell;
        int put_index = hq->host_index;

        if (hq->type != LPFC_HRQ || dq->type != LPFC_DRQ)
                return -EINVAL;
        if (hq->host_index != dq->host_index)
                return -EINVAL;
        /* If the host has not yet processed the next entry then we are done */
        if (((hq->host_index + 1) % hq->entry_count) == hq->hba_index)
                return -EBUSY;
        lpfc_sli_pcimem_bcopy(hrqe, temp_hrqe, hq->entry_size);
        lpfc_sli_pcimem_bcopy(drqe, temp_drqe, dq->entry_size);

        /* Update the host index to point to the next slot */
        hq->host_index = ((hq->host_index + 1) % hq->entry_count);
        dq->host_index = ((dq->host_index + 1) % dq->entry_count);

        /* Ring The Header Receive Queue Doorbell */
        if (!(hq->host_index % LPFC_RQ_POST_BATCH)) {
                doorbell.word0 = 0;
                bf_set(lpfc_rq_doorbell_num_posted, &doorbell,
                       LPFC_RQ_POST_BATCH);
                bf_set(lpfc_rq_doorbell_id, &doorbell, hq->queue_id);
                writel(doorbell.word0, hq->phba->sli4_hba.RQDBregaddr);
        }
        return put_index;
}

/**
 * lpfc_sli4_rq_release - Updates internal hba index for RQ
 * @q: The Header Receive Queue to operate on.
 *
 * This routine will update the HBA index of a queue to reflect consumption of
 * one Receive Queue Entry by the HBA. When the HBA indicates that it has
 * consumed an entry the host calls this function to update the queue's
 * internal pointers. This routine returns the number of entries that were
 * consumed by the HBA.
 **/
static uint32_t
lpfc_sli4_rq_release(struct lpfc_queue *hq, struct lpfc_queue *dq)
{
        if ((hq->type != LPFC_HRQ) || (dq->type != LPFC_DRQ))
                return 0;
        hq->hba_index = ((hq->hba_index + 1) % hq->entry_count);
        dq->hba_index = ((dq->hba_index + 1) % dq->entry_count);
        return 1;
}

/**
 * lpfc_cmd_iocb - Get next command iocb entry in the ring
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function returns pointer to next command iocb entry
 * in the command ring. The caller must hold hbalock to prevent
 * other threads consume the next command iocb.
 * SLI-2/SLI-3 provide different sized iocbs.
 **/
static inline IOCB_t *
lpfc_cmd_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        return (IOCB_t *) (((char *) pring->cmdringaddr) +
                           pring->cmdidx * phba->iocb_cmd_size);
}

/**
 * lpfc_resp_iocb - Get next response iocb entry in the ring
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function returns pointer to next response iocb entry
 * in the response ring. The caller must hold hbalock to make sure
 * that no other thread consume the next response iocb.
 * SLI-2/SLI-3 provide different sized iocbs.
 **/
static inline IOCB_t *
lpfc_resp_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        return (IOCB_t *) (((char *) pring->rspringaddr) +
                           pring->rspidx * phba->iocb_rsp_size);
}

/**
 * __lpfc_sli_get_iocbq - Allocates an iocb object from iocb pool
 * @phba: Pointer to HBA context object.
 *
 * This function is called with hbalock held. This function
 * allocates a new driver iocb object from the iocb pool. If the
 * allocation is successful, it returns pointer to the newly
 * allocated iocb object else it returns NULL.
 **/
static struct lpfc_iocbq *
__lpfc_sli_get_iocbq(struct lpfc_hba *phba)
{
        struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
        struct lpfc_iocbq * iocbq = NULL;

        list_remove_head(lpfc_iocb_list, iocbq, struct lpfc_iocbq, list);
        return iocbq;
}

/**
 * __lpfc_clear_active_sglq - Remove the active sglq for this XRI.
 * @phba: Pointer to HBA context object.
 * @xritag: XRI value.
 *
 * This function clears the sglq pointer from the array of acive
 * sglq's. The xritag that is passed in is used to index into the
 * array. Before the xritag can be used it needs to be adjusted
 * by subtracting the xribase.
 *
 * Returns sglq ponter = success, NULL = Failure.
 **/
static struct lpfc_sglq *
__lpfc_clear_active_sglq(struct lpfc_hba *phba, uint16_t xritag)
{
        uint16_t adj_xri;
        struct lpfc_sglq *sglq;
        adj_xri = xritag - phba->sli4_hba.max_cfg_param.xri_base;
        if (adj_xri > phba->sli4_hba.max_cfg_param.max_xri)
                return NULL;
        sglq = phba->sli4_hba.lpfc_sglq_active_list[adj_xri];
        phba->sli4_hba.lpfc_sglq_active_list[adj_xri] = NULL;
        return sglq;
}

/**
 * __lpfc_get_active_sglq - Get the active sglq for this XRI.
 * @phba: Pointer to HBA context object.
 * @xritag: XRI value.
 *
 * This function returns the sglq pointer from the array of acive
 * sglq's. The xritag that is passed in is used to index into the
 * array. Before the xritag can be used it needs to be adjusted
 * by subtracting the xribase.
 *
 * Returns sglq ponter = success, NULL = Failure.
 **/
static struct lpfc_sglq *
__lpfc_get_active_sglq(struct lpfc_hba *phba, uint16_t xritag)
{
        uint16_t adj_xri;
        struct lpfc_sglq *sglq;
        adj_xri = xritag - phba->sli4_hba.max_cfg_param.xri_base;
        if (adj_xri > phba->sli4_hba.max_cfg_param.max_xri)
                return NULL;
        sglq =  phba->sli4_hba.lpfc_sglq_active_list[adj_xri];
        return sglq;
}

/**
 * __lpfc_sli_get_sglq - Allocates an iocb object from sgl pool
 * @phba: Pointer to HBA context object.
 *
 * This function is called with hbalock held. This function
 * Gets a new driver sglq object from the sglq list. If the
 * list is not empty then it is successful, it returns pointer to the newly
 * allocated sglq object else it returns NULL.
 **/
static struct lpfc_sglq *
__lpfc_sli_get_sglq(struct lpfc_hba *phba)
{
        struct list_head *lpfc_sgl_list = &phba->sli4_hba.lpfc_sgl_list;
        struct lpfc_sglq *sglq = NULL;
        uint16_t adj_xri;
        list_remove_head(lpfc_sgl_list, sglq, struct lpfc_sglq, list);
        if (!sglq)
                return NULL;
        adj_xri = sglq->sli4_xritag - phba->sli4_hba.max_cfg_param.xri_base;
        phba->sli4_hba.lpfc_sglq_active_list[adj_xri] = sglq;
        return sglq;
}

/**
 * lpfc_sli_get_iocbq - Allocates an iocb object from iocb pool
 * @phba: Pointer to HBA context object.
 *
 * This function is called with no lock held. This function
 * allocates a new driver iocb object from the iocb pool. If the
 * allocation is successful, it returns pointer to the newly
 * allocated iocb object else it returns NULL.
 **/
struct lpfc_iocbq *
lpfc_sli_get_iocbq(struct lpfc_hba *phba)
{
        struct lpfc_iocbq * iocbq = NULL;
        unsigned long iflags;

        spin_lock_irqsave(&phba->hbalock, iflags);
        iocbq = __lpfc_sli_get_iocbq(phba);
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        return iocbq;
}

/**
 * __lpfc_sli_release_iocbq_s4 - Release iocb to the iocb pool
 * @phba: Pointer to HBA context object.
 * @iocbq: Pointer to driver iocb object.
 *
 * This function is called with hbalock held to release driver
 * iocb object to the iocb pool. The iotag in the iocb object
 * does not change for each use of the iocb object. This function
 * clears all other fields of the iocb object when it is freed.
 * The sqlq structure that holds the xritag and phys and virtual
 * mappings for the scatter gather list is retrieved from the
 * active array of sglq. The get of the sglq pointer also clears
 * the entry in the array. If the status of the IO indiactes that
 * this IO was aborted then the sglq entry it put on the
 * lpfc_abts_els_sgl_list until the CQ_ABORTED_XRI is received. If the
 * IO has good status or fails for any other reason then the sglq
 * entry is added to the free list (lpfc_sgl_list).
 **/
static void
__lpfc_sli_release_iocbq_s4(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
        struct lpfc_sglq *sglq;
        size_t start_clean = offsetof(struct lpfc_iocbq, iocb);
        unsigned long iflag;

        if (iocbq->sli4_xritag == NO_XRI)
                sglq = NULL;
        else
                sglq = __lpfc_clear_active_sglq(phba, iocbq->sli4_xritag);
        if (sglq)  {
                if (iocbq->iocb_flag & LPFC_EXCHANGE_BUSY) {
                        spin_lock_irqsave(&phba->sli4_hba.abts_sgl_list_lock,
                                        iflag);
                        list_add(&sglq->list,
                                &phba->sli4_hba.lpfc_abts_els_sgl_list);
                        spin_unlock_irqrestore(
                                &phba->sli4_hba.abts_sgl_list_lock, iflag);
                } else
                        list_add(&sglq->list, &phba->sli4_hba.lpfc_sgl_list);
        }


        /*
         * Clean all volatile data fields, preserve iotag and node struct.
         */
        memset((char *)iocbq + start_clean, 0, sizeof(*iocbq) - start_clean);
        iocbq->sli4_xritag = NO_XRI;
        list_add_tail(&iocbq->list, &phba->lpfc_iocb_list);
}

/**
 * __lpfc_sli_release_iocbq_s3 - Release iocb to the iocb pool
 * @phba: Pointer to HBA context object.
 * @iocbq: Pointer to driver iocb object.
 *
 * This function is called with hbalock held to release driver
 * iocb object to the iocb pool. The iotag in the iocb object
 * does not change for each use of the iocb object. This function
 * clears all other fields of the iocb object when it is freed.
 **/
static void
__lpfc_sli_release_iocbq_s3(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
        size_t start_clean = offsetof(struct lpfc_iocbq, iocb);

        /*
         * Clean all volatile data fields, preserve iotag and node struct.
         */
        memset((char*)iocbq + start_clean, 0, sizeof(*iocbq) - start_clean);
        iocbq->sli4_xritag = NO_XRI;
        list_add_tail(&iocbq->list, &phba->lpfc_iocb_list);
}

/**
 * __lpfc_sli_release_iocbq - Release iocb to the iocb pool
 * @phba: Pointer to HBA context object.
 * @iocbq: Pointer to driver iocb object.
 *
 * This function is called with hbalock held to release driver
 * iocb object to the iocb pool. The iotag in the iocb object
 * does not change for each use of the iocb object. This function
 * clears all other fields of the iocb object when it is freed.
 **/
static void
__lpfc_sli_release_iocbq(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
        phba->__lpfc_sli_release_iocbq(phba, iocbq);
}

/**
 * lpfc_sli_release_iocbq - Release iocb to the iocb pool
 * @phba: Pointer to HBA context object.
 * @iocbq: Pointer to driver iocb object.
 *
 * This function is called with no lock held to release the iocb to
 * iocb pool.
 **/
void
lpfc_sli_release_iocbq(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
        unsigned long iflags;

        /*
         * Clean all volatile data fields, preserve iotag and node struct.
         */
        spin_lock_irqsave(&phba->hbalock, iflags);
        __lpfc_sli_release_iocbq(phba, iocbq);
        spin_unlock_irqrestore(&phba->hbalock, iflags);
}

/**
 * lpfc_sli_cancel_iocbs - Cancel all iocbs from a list.
 * @phba: Pointer to HBA context object.
 * @iocblist: List of IOCBs.
 * @ulpstatus: ULP status in IOCB command field.
 * @ulpWord4: ULP word-4 in IOCB command field.
 *
 * This function is called with a list of IOCBs to cancel. It cancels the IOCB
 * on the list by invoking the complete callback function associated with the
 * IOCB with the provided @ulpstatus and @ulpword4 set to the IOCB commond
 * fields.
 **/
void
lpfc_sli_cancel_iocbs(struct lpfc_hba *phba, struct list_head *iocblist,
                      uint32_t ulpstatus, uint32_t ulpWord4)
{
        struct lpfc_iocbq *piocb;

        while (!list_empty(iocblist)) {
                list_remove_head(iocblist, piocb, struct lpfc_iocbq, list);

                if (!piocb->iocb_cmpl)
                        lpfc_sli_release_iocbq(phba, piocb);
                else {
                        piocb->iocb.ulpStatus = ulpstatus;
                        piocb->iocb.un.ulpWord[4] = ulpWord4;
                        (piocb->iocb_cmpl) (phba, piocb, piocb);
                }
        }
        return;
}

/**
 * lpfc_sli_iocb_cmd_type - Get the iocb type
 * @iocb_cmnd: iocb command code.
 *
 * This function is called by ring event handler function to get the iocb type.
 * This function translates the iocb command to an iocb command type used to
 * decide the final disposition of each completed IOCB.
 * The function returns
 * LPFC_UNKNOWN_IOCB if it is an unsupported iocb
 * LPFC_SOL_IOCB     if it is a solicited iocb completion
 * LPFC_ABORT_IOCB   if it is an abort iocb
 * LPFC_UNSOL_IOCB   if it is an unsolicited iocb
 *
 * The caller is not required to hold any lock.
 **/
static lpfc_iocb_type
lpfc_sli_iocb_cmd_type(uint8_t iocb_cmnd)
{
        lpfc_iocb_type type = LPFC_UNKNOWN_IOCB;

        if (iocb_cmnd > CMD_MAX_IOCB_CMD)
                return 0;

        switch (iocb_cmnd) {
        case CMD_XMIT_SEQUENCE_CR:
        case CMD_XMIT_SEQUENCE_CX:
        case CMD_XMIT_BCAST_CN:
        case CMD_XMIT_BCAST_CX:
        case CMD_ELS_REQUEST_CR:
        case CMD_ELS_REQUEST_CX:
        case CMD_CREATE_XRI_CR:
        case CMD_CREATE_XRI_CX:
        case CMD_GET_RPI_CN:
        case CMD_XMIT_ELS_RSP_CX:
        case CMD_GET_RPI_CR:
        case CMD_FCP_IWRITE_CR:
        case CMD_FCP_IWRITE_CX:
        case CMD_FCP_IREAD_CR:
        case CMD_FCP_IREAD_CX:
        case CMD_FCP_ICMND_CR:
        case CMD_FCP_ICMND_CX:
        case CMD_FCP_TSEND_CX:
        case CMD_FCP_TRSP_CX:
        case CMD_FCP_TRECEIVE_CX:
        case CMD_FCP_AUTO_TRSP_CX:
        case CMD_ADAPTER_MSG:
        case CMD_ADAPTER_DUMP:
        case CMD_XMIT_SEQUENCE64_CR:
        case CMD_XMIT_SEQUENCE64_CX:
        case CMD_XMIT_BCAST64_CN:
        case CMD_XMIT_BCAST64_CX:
        case CMD_ELS_REQUEST64_CR:
        case CMD_ELS_REQUEST64_CX:
        case CMD_FCP_IWRITE64_CR:
        case CMD_FCP_IWRITE64_CX:
        case CMD_FCP_IREAD64_CR:
        case CMD_FCP_IREAD64_CX:
        case CMD_FCP_ICMND64_CR:
        case CMD_FCP_ICMND64_CX:
        case CMD_FCP_TSEND64_CX:
        case CMD_FCP_TRSP64_CX:
        case CMD_FCP_TRECEIVE64_CX:
        case CMD_GEN_REQUEST64_CR:
        case CMD_GEN_REQUEST64_CX:
        case CMD_XMIT_ELS_RSP64_CX:
        case DSSCMD_IWRITE64_CR:
        case DSSCMD_IWRITE64_CX:
        case DSSCMD_IREAD64_CR:
        case DSSCMD_IREAD64_CX:
                type = LPFC_SOL_IOCB;
                break;
        case CMD_ABORT_XRI_CN:
        case CMD_ABORT_XRI_CX:
        case CMD_CLOSE_XRI_CN:
        case CMD_CLOSE_XRI_CX:
        case CMD_XRI_ABORTED_CX:
        case CMD_ABORT_MXRI64_CN:
        case CMD_XMIT_BLS_RSP64_CX:
                type = LPFC_ABORT_IOCB;
                break;
        case CMD_RCV_SEQUENCE_CX:
        case CMD_RCV_ELS_REQ_CX:
        case CMD_RCV_SEQUENCE64_CX:
        case CMD_RCV_ELS_REQ64_CX:
        case CMD_ASYNC_STATUS:
        case CMD_IOCB_RCV_SEQ64_CX:
        case CMD_IOCB_RCV_ELS64_CX:
        case CMD_IOCB_RCV_CONT64_CX:
        case CMD_IOCB_RET_XRI64_CX:
                type = LPFC_UNSOL_IOCB;
                break;
        case CMD_IOCB_XMIT_MSEQ64_CR:
        case CMD_IOCB_XMIT_MSEQ64_CX:
        case CMD_IOCB_RCV_SEQ_LIST64_CX:
        case CMD_IOCB_RCV_ELS_LIST64_CX:
        case CMD_IOCB_CLOSE_EXTENDED_CN:
        case CMD_IOCB_ABORT_EXTENDED_CN:
        case CMD_IOCB_RET_HBQE64_CN:
        case CMD_IOCB_FCP_IBIDIR64_CR:
        case CMD_IOCB_FCP_IBIDIR64_CX:
        case CMD_IOCB_FCP_ITASKMGT64_CX:
        case CMD_IOCB_LOGENTRY_CN:
        case CMD_IOCB_LOGENTRY_ASYNC_CN:
                printk("%s - Unhandled SLI-3 Command x%x\n",
                                __func__, iocb_cmnd);
                type = LPFC_UNKNOWN_IOCB;
                break;
        default:
                type = LPFC_UNKNOWN_IOCB;
                break;
        }

        return type;
}

/**
 * lpfc_sli_ring_map - Issue config_ring mbox for all rings
 * @phba: Pointer to HBA context object.
 *
 * This function is called from SLI initialization code
 * to configure every ring of the HBA's SLI interface. The
 * caller is not required to hold any lock. This function issues
 * a config_ring mailbox command for each ring.
 * This function returns zero if successful else returns a negative
 * error code.
 **/
static int
lpfc_sli_ring_map(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;
        LPFC_MBOXQ_t *pmb;
        MAILBOX_t *pmbox;
        int i, rc, ret = 0;

        pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb)
                return -ENOMEM;
        pmbox = &pmb->u.mb;
        phba->link_state = LPFC_INIT_MBX_CMDS;
        for (i = 0; i < psli->num_rings; i++) {
                lpfc_config_ring(phba, i, pmb);
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0446 Adapter failed to init (%d), "
                                        "mbxCmd x%x CFG_RING, mbxStatus x%x, "
                                        "ring %d\n",
                                        rc, pmbox->mbxCommand,
                                        pmbox->mbxStatus, i);
                        phba->link_state = LPFC_HBA_ERROR;
                        ret = -ENXIO;
                        break;
                }
        }
        mempool_free(pmb, phba->mbox_mem_pool);
        return ret;
}

/**
 * lpfc_sli_ringtxcmpl_put - Adds new iocb to the txcmplq
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @piocb: Pointer to the driver iocb object.
 *
 * This function is called with hbalock held. The function adds the
 * new iocb to txcmplq of the given ring. This function always returns
 * 0. If this function is called for ELS ring, this function checks if
 * there is a vport associated with the ELS command. This function also
 * starts els_tmofunc timer if this is an ELS command.
 **/
static int
lpfc_sli_ringtxcmpl_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                        struct lpfc_iocbq *piocb)
{
        list_add_tail(&piocb->list, &pring->txcmplq);
        pring->txcmplq_cnt++;
        if ((unlikely(pring->ringno == LPFC_ELS_RING)) &&
           (piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) &&
           (piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN)) {
                if (!piocb->vport)
                        BUG();
                else
                        mod_timer(&piocb->vport->els_tmofunc,
                                  jiffies + HZ * (phba->fc_ratov << 1));
        }


        return 0;
}

/**
 * lpfc_sli_ringtx_get - Get first element of the txq
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function is called with hbalock held to get next
 * iocb in txq of the given ring. If there is any iocb in
 * the txq, the function returns first iocb in the list after
 * removing the iocb from the list, else it returns NULL.
 **/
static struct lpfc_iocbq *
lpfc_sli_ringtx_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        struct lpfc_iocbq *cmd_iocb;

        list_remove_head((&pring->txq), cmd_iocb, struct lpfc_iocbq, list);
        if (cmd_iocb != NULL)
                pring->txq_cnt--;
        return cmd_iocb;
}

/**
 * lpfc_sli_next_iocb_slot - Get next iocb slot in the ring
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function is called with hbalock held and the caller must post the
 * iocb without releasing the lock. If the caller releases the lock,
 * iocb slot returned by the function is not guaranteed to be available.
 * The function returns pointer to the next available iocb slot if there
 * is available slot in the ring, else it returns NULL.
 * If the get index of the ring is ahead of the put index, the function
 * will post an error attention event to the worker thread to take the
 * HBA to offline state.
 **/
static IOCB_t *
lpfc_sli_next_iocb_slot (struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno];
        uint32_t  max_cmd_idx = pring->numCiocb;
        if ((pring->next_cmdidx == pring->cmdidx) &&
           (++pring->next_cmdidx >= max_cmd_idx))
                pring->next_cmdidx = 0;

        if (unlikely(pring->local_getidx == pring->next_cmdidx)) {

                pring->local_getidx = le32_to_cpu(pgp->cmdGetInx);

                if (unlikely(pring->local_getidx >= max_cmd_idx)) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                        "0315 Ring %d issue: portCmdGet %d "
                                        "is bigger than cmd ring %d\n",
                                        pring->ringno,
                                        pring->local_getidx, max_cmd_idx);

                        phba->link_state = LPFC_HBA_ERROR;
                        /*
                         * All error attention handlers are posted to
                         * worker thread
                         */
                        phba->work_ha |= HA_ERATT;
                        phba->work_hs = HS_FFER3;

                        lpfc_worker_wake_up(phba);

                        return NULL;
                }

                if (pring->local_getidx == pring->next_cmdidx)
                        return NULL;
        }

        return lpfc_cmd_iocb(phba, pring);
}

/**
 * lpfc_sli_next_iotag - Get an iotag for the iocb
 * @phba: Pointer to HBA context object.
 * @iocbq: Pointer to driver iocb object.
 *
 * This function gets an iotag for the iocb. If there is no unused iotag and
 * the iocbq_lookup_len < 0xffff, this function allocates a bigger iotag_lookup
 * array and assigns a new iotag.
 * The function returns the allocated iotag if successful, else returns zero.
 * Zero is not a valid iotag.
 * The caller is not required to hold any lock.
 **/
uint16_t
lpfc_sli_next_iotag(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq)
{
        struct lpfc_iocbq **new_arr;
        struct lpfc_iocbq **old_arr;
        size_t new_len;
        struct lpfc_sli *psli = &phba->sli;
        uint16_t iotag;

        spin_lock_irq(&phba->hbalock);
        iotag = psli->last_iotag;
        if(++iotag < psli->iocbq_lookup_len) {
                psli->last_iotag = iotag;
                psli->iocbq_lookup[iotag] = iocbq;
                spin_unlock_irq(&phba->hbalock);
                iocbq->iotag = iotag;
                return iotag;
        } else if (psli->iocbq_lookup_len < (0xffff
                                           - LPFC_IOCBQ_LOOKUP_INCREMENT)) {
                new_len = psli->iocbq_lookup_len + LPFC_IOCBQ_LOOKUP_INCREMENT;
                spin_unlock_irq(&phba->hbalock);
                new_arr = kzalloc(new_len * sizeof (struct lpfc_iocbq *),
                                  GFP_KERNEL);
                if (new_arr) {
                        spin_lock_irq(&phba->hbalock);
                        old_arr = psli->iocbq_lookup;
                        if (new_len <= psli->iocbq_lookup_len) {
                                /* highly unprobable case */
                                kfree(new_arr);
                                iotag = psli->last_iotag;
                                if(++iotag < psli->iocbq_lookup_len) {
                                        psli->last_iotag = iotag;
                                        psli->iocbq_lookup[iotag] = iocbq;
                                        spin_unlock_irq(&phba->hbalock);
                                        iocbq->iotag = iotag;
                                        return iotag;
                                }
                                spin_unlock_irq(&phba->hbalock);
                                return 0;
                        }
                        if (psli->iocbq_lookup)
                                memcpy(new_arr, old_arr,
                                       ((psli->last_iotag  + 1) *
                                        sizeof (struct lpfc_iocbq *)));
                        psli->iocbq_lookup = new_arr;
                        psli->iocbq_lookup_len = new_len;
                        psli->last_iotag = iotag;
                        psli->iocbq_lookup[iotag] = iocbq;
                        spin_unlock_irq(&phba->hbalock);
                        iocbq->iotag = iotag;
                        kfree(old_arr);
                        return iotag;
                }
        } else
                spin_unlock_irq(&phba->hbalock);

        lpfc_printf_log(phba, KERN_ERR,LOG_SLI,
                        "0318 Failed to allocate IOTAG.last IOTAG is %d\n",
                        psli->last_iotag);

        return 0;
}

/**
 * lpfc_sli_submit_iocb - Submit an iocb to the firmware
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @iocb: Pointer to iocb slot in the ring.
 * @nextiocb: Pointer to driver iocb object which need to be
 *            posted to firmware.
 *
 * This function is called with hbalock held to post a new iocb to
 * the firmware. This function copies the new iocb to ring iocb slot and
 * updates the ring pointers. It adds the new iocb to txcmplq if there is
 * a completion call back for this iocb else the function will free the
 * iocb object.
 **/
static void
lpfc_sli_submit_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                IOCB_t *iocb, struct lpfc_iocbq *nextiocb)
{
        /*
         * Set up an iotag
         */
        nextiocb->iocb.ulpIoTag = (nextiocb->iocb_cmpl) ? nextiocb->iotag : 0;


        if (pring->ringno == LPFC_ELS_RING) {
                lpfc_debugfs_slow_ring_trc(phba,
                        "IOCB cmd ring:   wd4:x%08x wd6:x%08x wd7:x%08x",
                        *(((uint32_t *) &nextiocb->iocb) + 4),
                        *(((uint32_t *) &nextiocb->iocb) + 6),
                        *(((uint32_t *) &nextiocb->iocb) + 7));
        }

        /*
         * Issue iocb command to adapter
         */
        lpfc_sli_pcimem_bcopy(&nextiocb->iocb, iocb, phba->iocb_cmd_size);
        wmb();
        pring->stats.iocb_cmd++;

        /*
         * If there is no completion routine to call, we can release the
         * IOCB buffer back right now. For IOCBs, like QUE_RING_BUF,
         * that have no rsp ring completion, iocb_cmpl MUST be NULL.
         */
        if (nextiocb->iocb_cmpl)
                lpfc_sli_ringtxcmpl_put(phba, pring, nextiocb);
        else
                __lpfc_sli_release_iocbq(phba, nextiocb);

        /*
         * Let the HBA know what IOCB slot will be the next one the
         * driver will put a command into.
         */
        pring->cmdidx = pring->next_cmdidx;
        writel(pring->cmdidx, &phba->host_gp[pring->ringno].cmdPutInx);
}

/**
 * lpfc_sli_update_full_ring - Update the chip attention register
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * The caller is not required to hold any lock for calling this function.
 * This function updates the chip attention bits for the ring to inform firmware
 * that there are pending work to be done for this ring and requests an
 * interrupt when there is space available in the ring. This function is
 * called when the driver is unable to post more iocbs to the ring due
 * to unavailability of space in the ring.
 **/
static void
lpfc_sli_update_full_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        int ringno = pring->ringno;

        pring->flag |= LPFC_CALL_RING_AVAILABLE;

        wmb();

        /*
         * Set ring 'ringno' to SET R0CE_REQ in Chip Att register.
         * The HBA will tell us when an IOCB entry is available.
         */
        writel((CA_R0ATT|CA_R0CE_REQ) << (ringno*4), phba->CAregaddr);
        readl(phba->CAregaddr); /* flush */

        pring->stats.iocb_cmd_full++;
}

/**
 * lpfc_sli_update_ring - Update chip attention register
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function updates the chip attention register bit for the
 * given ring to inform HBA that there is more work to be done
 * in this ring. The caller is not required to hold any lock.
 **/
static void
lpfc_sli_update_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        int ringno = pring->ringno;

        /*
         * Tell the HBA that there is work to do in this ring.
         */
        if (!(phba->sli3_options & LPFC_SLI3_CRP_ENABLED)) {
                wmb();
                writel(CA_R0ATT << (ringno * 4), phba->CAregaddr);
                readl(phba->CAregaddr); /* flush */
        }
}

/**
 * lpfc_sli_resume_iocb - Process iocbs in the txq
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function is called with hbalock held to post pending iocbs
 * in the txq to the firmware. This function is called when driver
 * detects space available in the ring.
 **/
static void
lpfc_sli_resume_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        IOCB_t *iocb;
        struct lpfc_iocbq *nextiocb;

        /*
         * Check to see if:
         *  (a) there is anything on the txq to send
         *  (b) link is up
         *  (c) link attention events can be processed (fcp ring only)
         *  (d) IOCB processing is not blocked by the outstanding mbox command.
         */
        if (pring->txq_cnt &&
            lpfc_is_link_up(phba) &&
            (pring->ringno != phba->sli.fcp_ring ||
             phba->sli.sli_flag & LPFC_PROCESS_LA)) {

                while ((iocb = lpfc_sli_next_iocb_slot(phba, pring)) &&
                       (nextiocb = lpfc_sli_ringtx_get(phba, pring)))
                        lpfc_sli_submit_iocb(phba, pring, iocb, nextiocb);

                if (iocb)
                        lpfc_sli_update_ring(phba, pring);
                else
                        lpfc_sli_update_full_ring(phba, pring);
        }

        return;
}

/**
 * lpfc_sli_next_hbq_slot - Get next hbq entry for the HBQ
 * @phba: Pointer to HBA context object.
 * @hbqno: HBQ number.
 *
 * This function is called with hbalock held to get the next
 * available slot for the given HBQ. If there is free slot
 * available for the HBQ it will return pointer to the next available
 * HBQ entry else it will return NULL.
 **/
static struct lpfc_hbq_entry *
lpfc_sli_next_hbq_slot(struct lpfc_hba *phba, uint32_t hbqno)
{
        struct hbq_s *hbqp = &phba->hbqs[hbqno];

        if (hbqp->next_hbqPutIdx == hbqp->hbqPutIdx &&
            ++hbqp->next_hbqPutIdx >= hbqp->entry_count)
                hbqp->next_hbqPutIdx = 0;

        if (unlikely(hbqp->local_hbqGetIdx == hbqp->next_hbqPutIdx)) {
                uint32_t raw_index = phba->hbq_get[hbqno];
                uint32_t getidx = le32_to_cpu(raw_index);

                hbqp->local_hbqGetIdx = getidx;

                if (unlikely(hbqp->local_hbqGetIdx >= hbqp->entry_count)) {
                        lpfc_printf_log(phba, KERN_ERR,
                                        LOG_SLI | LOG_VPORT,
                                        "1802 HBQ %d: local_hbqGetIdx "
                                        "%u is > than hbqp->entry_count %u\n",
                                        hbqno, hbqp->local_hbqGetIdx,
                                        hbqp->entry_count);

                        phba->link_state = LPFC_HBA_ERROR;
                        return NULL;
                }

                if (hbqp->local_hbqGetIdx == hbqp->next_hbqPutIdx)
                        return NULL;
        }

        return (struct lpfc_hbq_entry *) phba->hbqs[hbqno].hbq_virt +
                        hbqp->hbqPutIdx;
}

/**
 * lpfc_sli_hbqbuf_free_all - Free all the hbq buffers
 * @phba: Pointer to HBA context object.
 *
 * This function is called with no lock held to free all the
 * hbq buffers while uninitializing the SLI interface. It also
 * frees the HBQ buffers returned by the firmware but not yet
 * processed by the upper layers.
 **/
void
lpfc_sli_hbqbuf_free_all(struct lpfc_hba *phba)
{
        struct lpfc_dmabuf *dmabuf, *next_dmabuf;
        struct hbq_dmabuf *hbq_buf;
        unsigned long flags;
        int i, hbq_count;
        uint32_t hbqno;

        hbq_count = lpfc_sli_hbq_count();
        /* Return all memory used by all HBQs */
        spin_lock_irqsave(&phba->hbalock, flags);
        for (i = 0; i < hbq_count; ++i) {
                list_for_each_entry_safe(dmabuf, next_dmabuf,
                                &phba->hbqs[i].hbq_buffer_list, list) {
                        hbq_buf = container_of(dmabuf, struct hbq_dmabuf, dbuf);
                        list_del(&hbq_buf->dbuf.list);
                        (phba->hbqs[i].hbq_free_buffer)(phba, hbq_buf);
                }
                phba->hbqs[i].buffer_count = 0;
        }
        /* Return all HBQ buffer that are in-fly */
        list_for_each_entry_safe(dmabuf, next_dmabuf, &phba->rb_pend_list,
                                 list) {
                hbq_buf = container_of(dmabuf, struct hbq_dmabuf, dbuf);
                list_del(&hbq_buf->dbuf.list);
                if (hbq_buf->tag == -1) {
                        (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
                                (phba, hbq_buf);
                } else {
                        hbqno = hbq_buf->tag >> 16;
                        if (hbqno >= LPFC_MAX_HBQS)
                                (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
                                        (phba, hbq_buf);
                        else
                                (phba->hbqs[hbqno].hbq_free_buffer)(phba,
                                        hbq_buf);
                }
        }

        /* Mark the HBQs not in use */
        phba->hbq_in_use = 0;
        spin_unlock_irqrestore(&phba->hbalock, flags);
}

/**
 * lpfc_sli_hbq_to_firmware - Post the hbq buffer to firmware
 * @phba: Pointer to HBA context object.
 * @hbqno: HBQ number.
 * @hbq_buf: Pointer to HBQ buffer.
 *
 * This function is called with the hbalock held to post a
 * hbq buffer to the firmware. If the function finds an empty
 * slot in the HBQ, it will post the buffer. The function will return
 * pointer to the hbq entry if it successfully post the buffer
 * else it will return NULL.
 **/
static int
lpfc_sli_hbq_to_firmware(struct lpfc_hba *phba, uint32_t hbqno,
                         struct hbq_dmabuf *hbq_buf)
{
        return phba->lpfc_sli_hbq_to_firmware(phba, hbqno, hbq_buf);
}

/**
 * lpfc_sli_hbq_to_firmware_s3 - Post the hbq buffer to SLI3 firmware
 * @phba: Pointer to HBA context object.
 * @hbqno: HBQ number.
 * @hbq_buf: Pointer to HBQ buffer.
 *
 * This function is called with the hbalock held to post a hbq buffer to the
 * firmware. If the function finds an empty slot in the HBQ, it will post the
 * buffer and place it on the hbq_buffer_list. The function will return zero if
 * it successfully post the buffer else it will return an error.
 **/
static int
lpfc_sli_hbq_to_firmware_s3(struct lpfc_hba *phba, uint32_t hbqno,
                            struct hbq_dmabuf *hbq_buf)
{
        struct lpfc_hbq_entry *hbqe;
        dma_addr_t physaddr = hbq_buf->dbuf.phys;

        /* Get next HBQ entry slot to use */
        hbqe = lpfc_sli_next_hbq_slot(phba, hbqno);
        if (hbqe) {
                struct hbq_s *hbqp = &phba->hbqs[hbqno];

                hbqe->bde.addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
                hbqe->bde.addrLow  = le32_to_cpu(putPaddrLow(physaddr));
                hbqe->bde.tus.f.bdeSize = hbq_buf->size;
                hbqe->bde.tus.f.bdeFlags = 0;
                hbqe->bde.tus.w = le32_to_cpu(hbqe->bde.tus.w);
                hbqe->buffer_tag = le32_to_cpu(hbq_buf->tag);
                                /* Sync SLIM */
                hbqp->hbqPutIdx = hbqp->next_hbqPutIdx;
                writel(hbqp->hbqPutIdx, phba->hbq_put + hbqno);
                                /* flush */
                readl(phba->hbq_put + hbqno);
                list_add_tail(&hbq_buf->dbuf.list, &hbqp->hbq_buffer_list);
                return 0;
        } else
                return -ENOMEM;
}

/**
 * lpfc_sli_hbq_to_firmware_s4 - Post the hbq buffer to SLI4 firmware
 * @phba: Pointer to HBA context object.
 * @hbqno: HBQ number.
 * @hbq_buf: Pointer to HBQ buffer.
 *
 * This function is called with the hbalock held to post an RQE to the SLI4
 * firmware. If able to post the RQE to the RQ it will queue the hbq entry to
 * the hbq_buffer_list and return zero, otherwise it will return an error.
 **/
static int
lpfc_sli_hbq_to_firmware_s4(struct lpfc_hba *phba, uint32_t hbqno,
                            struct hbq_dmabuf *hbq_buf)
{
        int rc;
        struct lpfc_rqe hrqe;
        struct lpfc_rqe drqe;

        hrqe.address_lo = putPaddrLow(hbq_buf->hbuf.phys);
        hrqe.address_hi = putPaddrHigh(hbq_buf->hbuf.phys);
        drqe.address_lo = putPaddrLow(hbq_buf->dbuf.phys);
        drqe.address_hi = putPaddrHigh(hbq_buf->dbuf.phys);
        rc = lpfc_sli4_rq_put(phba->sli4_hba.hdr_rq, phba->sli4_hba.dat_rq,
                              &hrqe, &drqe);
        if (rc < 0)
                return rc;
        hbq_buf->tag = rc;
        list_add_tail(&hbq_buf->dbuf.list, &phba->hbqs[hbqno].hbq_buffer_list);
        return 0;
}

/* HBQ for ELS and CT traffic. */
static struct lpfc_hbq_init lpfc_els_hbq = {
        .rn = 1,
        .entry_count = 256,
        .mask_count = 0,
        .profile = 0,
        .ring_mask = (1 << LPFC_ELS_RING),
        .buffer_count = 0,
        .init_count = 40,
        .add_count = 40,
};

/* HBQ for the extra ring if needed */
static struct lpfc_hbq_init lpfc_extra_hbq = {
        .rn = 1,
        .entry_count = 200,
        .mask_count = 0,
        .profile = 0,
        .ring_mask = (1 << LPFC_EXTRA_RING),
        .buffer_count = 0,
        .init_count = 0,
        .add_count = 5,
};

/* Array of HBQs */
struct lpfc_hbq_init *lpfc_hbq_defs[] = {
        &lpfc_els_hbq,
        &lpfc_extra_hbq,
};

/**
 * lpfc_sli_hbqbuf_fill_hbqs - Post more hbq buffers to HBQ
 * @phba: Pointer to HBA context object.
 * @hbqno: HBQ number.
 * @count: Number of HBQ buffers to be posted.
 *
 * This function is called with no lock held to post more hbq buffers to the
 * given HBQ. The function returns the number of HBQ buffers successfully
 * posted.
 **/
static int
lpfc_sli_hbqbuf_fill_hbqs(struct lpfc_hba *phba, uint32_t hbqno, uint32_t count)
{
        uint32_t i, posted = 0;
        unsigned long flags;
        struct hbq_dmabuf *hbq_buffer;
        LIST_HEAD(hbq_buf_list);
        if (!phba->hbqs[hbqno].hbq_alloc_buffer)
                return 0;

        if ((phba->hbqs[hbqno].buffer_count + count) >
            lpfc_hbq_defs[hbqno]->entry_count)
                count = lpfc_hbq_defs[hbqno]->entry_count -
                                        phba->hbqs[hbqno].buffer_count;
        if (!count)
                return 0;
        /* Allocate HBQ entries */
        for (i = 0; i < count; i++) {
                hbq_buffer = (phba->hbqs[hbqno].hbq_alloc_buffer)(phba);
                if (!hbq_buffer)
                        break;
                list_add_tail(&hbq_buffer->dbuf.list, &hbq_buf_list);
        }
        /* Check whether HBQ is still in use */
        spin_lock_irqsave(&phba->hbalock, flags);
        if (!phba->hbq_in_use)
                goto err;
        while (!list_empty(&hbq_buf_list)) {
                list_remove_head(&hbq_buf_list, hbq_buffer, struct hbq_dmabuf,
                                 dbuf.list);
                hbq_buffer->tag = (phba->hbqs[hbqno].buffer_count |
                                      (hbqno << 16));
                if (!lpfc_sli_hbq_to_firmware(phba, hbqno, hbq_buffer)) {
                        phba->hbqs[hbqno].buffer_count++;
                        posted++;
                } else
                        (phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer);
        }
        spin_unlock_irqrestore(&phba->hbalock, flags);
        return posted;
err:
        spin_unlock_irqrestore(&phba->hbalock, flags);
        while (!list_empty(&hbq_buf_list)) {
                list_remove_head(&hbq_buf_list, hbq_buffer, struct hbq_dmabuf,
                                 dbuf.list);
                (phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer);
        }
        return 0;
}

/**
 * lpfc_sli_hbqbuf_add_hbqs - Post more HBQ buffers to firmware
 * @phba: Pointer to HBA context object.
 * @qno: HBQ number.
 *
 * This function posts more buffers to the HBQ. This function
 * is called with no lock held. The function returns the number of HBQ entries
 * successfully allocated.
 **/
int
lpfc_sli_hbqbuf_add_hbqs(struct lpfc_hba *phba, uint32_t qno)
{
        if (phba->sli_rev == LPFC_SLI_REV4)
                return 0;
        else
                return lpfc_sli_hbqbuf_fill_hbqs(phba, qno,
                                         lpfc_hbq_defs[qno]->add_count);
}

/**
 * lpfc_sli_hbqbuf_init_hbqs - Post initial buffers to the HBQ
 * @phba: Pointer to HBA context object.
 * @qno:  HBQ queue number.
 *
 * This function is called from SLI initialization code path with
 * no lock held to post initial HBQ buffers to firmware. The
 * function returns the number of HBQ entries successfully allocated.
 **/
static int
lpfc_sli_hbqbuf_init_hbqs(struct lpfc_hba *phba, uint32_t qno)
{
        if (phba->sli_rev == LPFC_SLI_REV4)
                return lpfc_sli_hbqbuf_fill_hbqs(phba, qno,
                                         lpfc_hbq_defs[qno]->entry_count);
        else
                return lpfc_sli_hbqbuf_fill_hbqs(phba, qno,
                                         lpfc_hbq_defs[qno]->init_count);
}

/**
 * lpfc_sli_hbqbuf_get - Remove the first hbq off of an hbq list
 * @phba: Pointer to HBA context object.
 * @hbqno: HBQ number.
 *
 * This function removes the first hbq buffer on an hbq list and returns a
 * pointer to that buffer. If it finds no buffers on the list it returns NULL.
 **/
static struct hbq_dmabuf *
lpfc_sli_hbqbuf_get(struct list_head *rb_list)
{
        struct lpfc_dmabuf *d_buf;

        list_remove_head(rb_list, d_buf, struct lpfc_dmabuf, list);
        if (!d_buf)
                return NULL;
        return container_of(d_buf, struct hbq_dmabuf, dbuf);
}

/**
 * lpfc_sli_hbqbuf_find - Find the hbq buffer associated with a tag
 * @phba: Pointer to HBA context object.
 * @tag: Tag of the hbq buffer.
 *
 * This function is called with hbalock held. This function searches
 * for the hbq buffer associated with the given tag in the hbq buffer
 * list. If it finds the hbq buffer, it returns the hbq_buffer other wise
 * it returns NULL.
 **/
static struct hbq_dmabuf *
lpfc_sli_hbqbuf_find(struct lpfc_hba *phba, uint32_t tag)
{
        struct lpfc_dmabuf *d_buf;
        struct hbq_dmabuf *hbq_buf;
        uint32_t hbqno;

        hbqno = tag >> 16;
        if (hbqno >= LPFC_MAX_HBQS)
                return NULL;

        spin_lock_irq(&phba->hbalock);
        list_for_each_entry(d_buf, &phba->hbqs[hbqno].hbq_buffer_list, list) {
                hbq_buf = container_of(d_buf, struct hbq_dmabuf, dbuf);
                if (hbq_buf->tag == tag) {
                        spin_unlock_irq(&phba->hbalock);
                        return hbq_buf;
                }
        }
        spin_unlock_irq(&phba->hbalock);
        lpfc_printf_log(phba, KERN_ERR, LOG_SLI | LOG_VPORT,
                        "1803 Bad hbq tag. Data: x%x x%x\n",
                        tag, phba->hbqs[tag >> 16].buffer_count);
        return NULL;
}

/**
 * lpfc_sli_free_hbq - Give back the hbq buffer to firmware
 * @phba: Pointer to HBA context object.
 * @hbq_buffer: Pointer to HBQ buffer.
 *
 * This function is called with hbalock. This function gives back
 * the hbq buffer to firmware. If the HBQ does not have space to
 * post the buffer, it will free the buffer.
 **/
void
lpfc_sli_free_hbq(struct lpfc_hba *phba, struct hbq_dmabuf *hbq_buffer)
{
        uint32_t hbqno;

        if (hbq_buffer) {
                hbqno = hbq_buffer->tag >> 16;
                if (lpfc_sli_hbq_to_firmware(phba, hbqno, hbq_buffer))
                        (phba->hbqs[hbqno].hbq_free_buffer)(phba, hbq_buffer);
        }
}

/**
 * lpfc_sli_chk_mbx_command - Check if the mailbox is a legitimate mailbox
 * @mbxCommand: mailbox command code.
 *
 * This function is called by the mailbox event handler function to verify
 * that the completed mailbox command is a legitimate mailbox command. If the
 * completed mailbox is not known to the function, it will return MBX_SHUTDOWN
 * and the mailbox event handler will take the HBA offline.
 **/
static int
lpfc_sli_chk_mbx_command(uint8_t mbxCommand)
{
        uint8_t ret;

        switch (mbxCommand) {
        case MBX_LOAD_SM:
        case MBX_READ_NV:
        case MBX_WRITE_NV:
        case MBX_WRITE_VPARMS:
        case MBX_RUN_BIU_DIAG:
        case MBX_INIT_LINK:
        case MBX_DOWN_LINK:
        case MBX_CONFIG_LINK:
        case MBX_CONFIG_RING:
        case MBX_RESET_RING:
        case MBX_READ_CONFIG:
        case MBX_READ_RCONFIG:
        case MBX_READ_SPARM:
        case MBX_READ_STATUS:
        case MBX_READ_RPI:
        case MBX_READ_XRI:
        case MBX_READ_REV:
        case MBX_READ_LNK_STAT:
        case MBX_REG_LOGIN:
        case MBX_UNREG_LOGIN:
        case MBX_READ_LA:
        case MBX_CLEAR_LA:
        case MBX_DUMP_MEMORY:
        case MBX_DUMP_CONTEXT:
        case MBX_RUN_DIAGS:
        case MBX_RESTART:
        case MBX_UPDATE_CFG:
        case MBX_DOWN_LOAD:
        case MBX_DEL_LD_ENTRY:
        case MBX_RUN_PROGRAM:
        case MBX_SET_MASK:
        case MBX_SET_VARIABLE:
        case MBX_UNREG_D_ID:
        case MBX_KILL_BOARD:
        case MBX_CONFIG_FARP:
        case MBX_BEACON:
        case MBX_LOAD_AREA:
        case MBX_RUN_BIU_DIAG64:
        case MBX_CONFIG_PORT:
        case MBX_READ_SPARM64:
        case MBX_READ_RPI64:
        case MBX_REG_LOGIN64:
        case MBX_READ_LA64:
        case MBX_WRITE_WWN:
        case MBX_SET_DEBUG:
        case MBX_LOAD_EXP_ROM:
        case MBX_ASYNCEVT_ENABLE:
        case MBX_REG_VPI:
        case MBX_UNREG_VPI:
        case MBX_HEARTBEAT:
        case MBX_PORT_CAPABILITIES:
        case MBX_PORT_IOV_CONTROL:
        case MBX_SLI4_CONFIG:
        case MBX_SLI4_REQ_FTRS:
        case MBX_REG_FCFI:
        case MBX_UNREG_FCFI:
        case MBX_REG_VFI:
        case MBX_UNREG_VFI:
        case MBX_INIT_VPI:
        case MBX_INIT_VFI:
        case MBX_RESUME_RPI:
                ret = mbxCommand;
                break;
        default:
                ret = MBX_SHUTDOWN;
                break;
        }
        return ret;
}

/**
 * lpfc_sli_wake_mbox_wait - lpfc_sli_issue_mbox_wait mbox completion handler
 * @phba: Pointer to HBA context object.
 * @pmboxq: Pointer to mailbox command.
 *
 * This is completion handler function for mailbox commands issued from
 * lpfc_sli_issue_mbox_wait function. This function is called by the
 * mailbox event handler function with no lock held. This function
 * will wake up thread waiting on the wait queue pointed by context1
 * of the mailbox.
 **/
void
lpfc_sli_wake_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq)
{
        wait_queue_head_t *pdone_q;
        unsigned long drvr_flag;

        /*
         * If pdone_q is empty, the driver thread gave up waiting and
         * continued running.
         */
        pmboxq->mbox_flag |= LPFC_MBX_WAKE;
        spin_lock_irqsave(&phba->hbalock, drvr_flag);
        pdone_q = (wait_queue_head_t *) pmboxq->context1;
        if (pdone_q)
                wake_up_interruptible(pdone_q);
        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
        return;
}


/**
 * lpfc_sli_def_mbox_cmpl - Default mailbox completion handler
 * @phba: Pointer to HBA context object.
 * @pmb: Pointer to mailbox object.
 *
 * This function is the default mailbox completion handler. It
 * frees the memory resources associated with the completed mailbox
 * command. If the completed command is a REG_LOGIN mailbox command,
 * this function will issue a UREG_LOGIN to re-claim the RPI.
 **/
void
lpfc_sli_def_mbox_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
        struct lpfc_dmabuf *mp;
        uint16_t rpi, vpi;
        int rc;
        struct lpfc_vport  *vport = pmb->vport;

        mp = (struct lpfc_dmabuf *) (pmb->context1);

        if (mp) {
                lpfc_mbuf_free(phba, mp->virt, mp->phys);
                kfree(mp);
        }

        if ((pmb->u.mb.mbxCommand == MBX_UNREG_LOGIN) &&
            (phba->sli_rev == LPFC_SLI_REV4))
                lpfc_sli4_free_rpi(phba, pmb->u.mb.un.varUnregLogin.rpi);

        /*
         * If a REG_LOGIN succeeded  after node is destroyed or node
         * is in re-discovery driver need to cleanup the RPI.
         */
        if (!(phba->pport->load_flag & FC_UNLOADING) &&
            pmb->u.mb.mbxCommand == MBX_REG_LOGIN64 &&
            !pmb->u.mb.mbxStatus) {
                rpi = pmb->u.mb.un.varWords[0];
                vpi = pmb->u.mb.un.varRegLogin.vpi - phba->vpi_base;
                lpfc_unreg_login(phba, vpi, rpi, pmb);
                pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
                if (rc != MBX_NOT_FINISHED)
                        return;
        }

        /* Unreg VPI, if the REG_VPI succeed after VLink failure */
        if ((pmb->u.mb.mbxCommand == MBX_REG_VPI) &&
                !(phba->pport->load_flag & FC_UNLOADING) &&
                !pmb->u.mb.mbxStatus) {
                lpfc_unreg_vpi(phba, pmb->u.mb.un.varRegVpi.vpi, pmb);
                pmb->vport = vport;
                pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
                if (rc != MBX_NOT_FINISHED)
                        return;
        }

        if (bf_get(lpfc_mqe_command, &pmb->u.mqe) == MBX_SLI4_CONFIG)
                lpfc_sli4_mbox_cmd_free(phba, pmb);
        else
                mempool_free(pmb, phba->mbox_mem_pool);
}

/**
 * lpfc_sli_handle_mb_event - Handle mailbox completions from firmware
 * @phba: Pointer to HBA context object.
 *
 * This function is called with no lock held. This function processes all
 * the completed mailbox commands and gives it to upper layers. The interrupt
 * service routine processes mailbox completion interrupt and adds completed
 * mailbox commands to the mboxq_cmpl queue and signals the worker thread.
 * Worker thread call lpfc_sli_handle_mb_event, which will return the
 * completed mailbox commands in mboxq_cmpl queue to the upper layers. This
 * function returns the mailbox commands to the upper layer by calling the
 * completion handler function of each mailbox.
 **/
int
lpfc_sli_handle_mb_event(struct lpfc_hba *phba)
{
        MAILBOX_t *pmbox;
        LPFC_MBOXQ_t *pmb;
        int rc;
        LIST_HEAD(cmplq);

        phba->sli.slistat.mbox_event++;

        /* Get all completed mailboxe buffers into the cmplq */
        spin_lock_irq(&phba->hbalock);
        list_splice_init(&phba->sli.mboxq_cmpl, &cmplq);
        spin_unlock_irq(&phba->hbalock);

        /* Get a Mailbox buffer to setup mailbox commands for callback */
        do {
                list_remove_head(&cmplq, pmb, LPFC_MBOXQ_t, list);
                if (pmb == NULL)
                        break;

                pmbox = &pmb->u.mb;

                if (pmbox->mbxCommand != MBX_HEARTBEAT) {
                        if (pmb->vport) {
                                lpfc_debugfs_disc_trc(pmb->vport,
                                        LPFC_DISC_TRC_MBOX_VPORT,
                                        "MBOX cmpl vport: cmd:x%x mb:x%x x%x",
                                        (uint32_t)pmbox->mbxCommand,
                                        pmbox->un.varWords[0],
                                        pmbox->un.varWords[1]);
                        }
                        else {
                                lpfc_debugfs_disc_trc(phba->pport,
                                        LPFC_DISC_TRC_MBOX,
                                        "MBOX cmpl:       cmd:x%x mb:x%x x%x",
                                        (uint32_t)pmbox->mbxCommand,
                                        pmbox->un.varWords[0],
                                        pmbox->un.varWords[1]);
                        }
                }

                /*
                 * It is a fatal error if unknown mbox command completion.
                 */
                if (lpfc_sli_chk_mbx_command(pmbox->mbxCommand) ==
                    MBX_SHUTDOWN) {
                        /* Unknown mailbox command compl */
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                        "(%d):0323 Unknown Mailbox command "
                                        "x%x (x%x) Cmpl\n",
                                        pmb->vport ? pmb->vport->vpi : 0,
                                        pmbox->mbxCommand,
                                        lpfc_sli4_mbox_opcode_get(phba, pmb));
                        phba->link_state = LPFC_HBA_ERROR;
                        phba->work_hs = HS_FFER3;
                        lpfc_handle_eratt(phba);
                        continue;
                }

                if (pmbox->mbxStatus) {
                        phba->sli.slistat.mbox_stat_err++;
                        if (pmbox->mbxStatus == MBXERR_NO_RESOURCES) {
                                /* Mbox cmd cmpl error - RETRYing */
                                lpfc_printf_log(phba, KERN_INFO,
                                                LOG_MBOX | LOG_SLI,
                                                "(%d):0305 Mbox cmd cmpl "
                                                "error - RETRYing Data: x%x "
                                                "(x%x) x%x x%x x%x\n",
                                                pmb->vport ? pmb->vport->vpi :0,
                                                pmbox->mbxCommand,
                                                lpfc_sli4_mbox_opcode_get(phba,
                                                                          pmb),
                                                pmbox->mbxStatus,
                                                pmbox->un.varWords[0],
                                                pmb->vport->port_state);
                                pmbox->mbxStatus = 0;
                                pmbox->mbxOwner = OWN_HOST;
                                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
                                if (rc != MBX_NOT_FINISHED)
                                        continue;
                        }
                }

                /* Mailbox cmd <cmd> Cmpl <cmpl> */
                lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                                "(%d):0307 Mailbox cmd x%x (x%x) Cmpl x%p "
                                "Data: x%x x%x x%x x%x x%x x%x x%x x%x x%x\n",
                                pmb->vport ? pmb->vport->vpi : 0,
                                pmbox->mbxCommand,
                                lpfc_sli4_mbox_opcode_get(phba, pmb),
                                pmb->mbox_cmpl,
                                *((uint32_t *) pmbox),
                                pmbox->un.varWords[0],
                                pmbox->un.varWords[1],
                                pmbox->un.varWords[2],
                                pmbox->un.varWords[3],
                                pmbox->un.varWords[4],
                                pmbox->un.varWords[5],
                                pmbox->un.varWords[6],
                                pmbox->un.varWords[7]);

                if (pmb->mbox_cmpl)
                        pmb->mbox_cmpl(phba,pmb);
        } while (1);
        return 0;
}

/**
 * lpfc_sli_get_buff - Get the buffer associated with the buffer tag
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @tag: buffer tag.
 *
 * This function is called with no lock held. When QUE_BUFTAG_BIT bit
 * is set in the tag the buffer is posted for a particular exchange,
 * the function will return the buffer without replacing the buffer.
 * If the buffer is for unsolicited ELS or CT traffic, this function
 * returns the buffer and also posts another buffer to the firmware.
 **/
static struct lpfc_dmabuf *
lpfc_sli_get_buff(struct lpfc_hba *phba,
                  struct lpfc_sli_ring *pring,
                  uint32_t tag)
{
        struct hbq_dmabuf *hbq_entry;

        if (tag & QUE_BUFTAG_BIT)
                return lpfc_sli_ring_taggedbuf_get(phba, pring, tag);
        hbq_entry = lpfc_sli_hbqbuf_find(phba, tag);
        if (!hbq_entry)
                return NULL;
        return &hbq_entry->dbuf;
}

/**
 * lpfc_complete_unsol_iocb - Complete an unsolicited sequence
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @saveq: Pointer to the iocbq struct representing the sequence starting frame.
 * @fch_r_ctl: the r_ctl for the first frame of the sequence.
 * @fch_type: the type for the first frame of the sequence.
 *
 * This function is called with no lock held. This function uses the r_ctl and
 * type of the received sequence to find the correct callback function to call
 * to process the sequence.
 **/
static int
lpfc_complete_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                         struct lpfc_iocbq *saveq, uint32_t fch_r_ctl,
                         uint32_t fch_type)
{
        int i;

        /* unSolicited Responses */
        if (pring->prt[0].profile) {
                if (pring->prt[0].lpfc_sli_rcv_unsol_event)
                        (pring->prt[0].lpfc_sli_rcv_unsol_event) (phba, pring,
                                                                        saveq);
                return 1;
        }
        /* We must search, based on rctl / type
           for the right routine */
        for (i = 0; i < pring->num_mask; i++) {
                if ((pring->prt[i].rctl == fch_r_ctl) &&
                    (pring->prt[i].type == fch_type)) {
                        if (pring->prt[i].lpfc_sli_rcv_unsol_event)
                                (pring->prt[i].lpfc_sli_rcv_unsol_event)
                                                (phba, pring, saveq);
                        return 1;
                }
        }
        return 0;
}

/**
 * lpfc_sli_process_unsol_iocb - Unsolicited iocb handler
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @saveq: Pointer to the unsolicited iocb.
 *
 * This function is called with no lock held by the ring event handler
 * when there is an unsolicited iocb posted to the response ring by the
 * firmware. This function gets the buffer associated with the iocbs
 * and calls the event handler for the ring. This function handles both
 * qring buffers and hbq buffers.
 * When the function returns 1 the caller can free the iocb object otherwise
 * upper layer functions will free the iocb objects.
 **/
static int
lpfc_sli_process_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                            struct lpfc_iocbq *saveq)
{
        IOCB_t           * irsp;
        WORD5            * w5p;
        uint32_t           Rctl, Type;
        uint32_t           match;
        struct lpfc_iocbq *iocbq;
        struct lpfc_dmabuf *dmzbuf;

        match = 0;
        irsp = &(saveq->iocb);

        if (irsp->ulpCommand == CMD_ASYNC_STATUS) {
                if (pring->lpfc_sli_rcv_async_status)
                        pring->lpfc_sli_rcv_async_status(phba, pring, saveq);
                else
                        lpfc_printf_log(phba,
                                        KERN_WARNING,
                                        LOG_SLI,
                                        "0316 Ring %d handler: unexpected "
                                        "ASYNC_STATUS iocb received evt_code "
                                        "0x%x\n",
                                        pring->ringno,
                                        irsp->un.asyncstat.evt_code);
                return 1;
        }

        if ((irsp->ulpCommand == CMD_IOCB_RET_XRI64_CX) &&
                (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)) {
                if (irsp->ulpBdeCount > 0) {
                        dmzbuf = lpfc_sli_get_buff(phba, pring,
                                        irsp->un.ulpWord[3]);
                        lpfc_in_buf_free(phba, dmzbuf);
                }

                if (irsp->ulpBdeCount > 1) {
                        dmzbuf = lpfc_sli_get_buff(phba, pring,
                                        irsp->unsli3.sli3Words[3]);
                        lpfc_in_buf_free(phba, dmzbuf);
                }

                if (irsp->ulpBdeCount > 2) {
                        dmzbuf = lpfc_sli_get_buff(phba, pring,
                                irsp->unsli3.sli3Words[7]);
                        lpfc_in_buf_free(phba, dmzbuf);
                }

                return 1;
        }

        if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
                if (irsp->ulpBdeCount != 0) {
                        saveq->context2 = lpfc_sli_get_buff(phba, pring,
                                                irsp->un.ulpWord[3]);
                        if (!saveq->context2)
                                lpfc_printf_log(phba,
                                        KERN_ERR,
                                        LOG_SLI,
                                        "0341 Ring %d Cannot find buffer for "
                                        "an unsolicited iocb. tag 0x%x\n",
                                        pring->ringno,
                                        irsp->un.ulpWord[3]);
                }
                if (irsp->ulpBdeCount == 2) {
                        saveq->context3 = lpfc_sli_get_buff(phba, pring,
                                                irsp->unsli3.sli3Words[7]);
                        if (!saveq->context3)
                                lpfc_printf_log(phba,
                                        KERN_ERR,
                                        LOG_SLI,
                                        "0342 Ring %d Cannot find buffer for an"
                                        " unsolicited iocb. tag 0x%x\n",
                                        pring->ringno,
                                        irsp->unsli3.sli3Words[7]);
                }
                list_for_each_entry(iocbq, &saveq->list, list) {
                        irsp = &(iocbq->iocb);
                        if (irsp->ulpBdeCount != 0) {
                                iocbq->context2 = lpfc_sli_get_buff(phba, pring,
                                                        irsp->un.ulpWord[3]);
                                if (!iocbq->context2)
                                        lpfc_printf_log(phba,
                                                KERN_ERR,
                                                LOG_SLI,
                                                "0343 Ring %d Cannot find "
                                                "buffer for an unsolicited iocb"
                                                ". tag 0x%x\n", pring->ringno,
                                                irsp->un.ulpWord[3]);
                        }
                        if (irsp->ulpBdeCount == 2) {
                                iocbq->context3 = lpfc_sli_get_buff(phba, pring,
                                                irsp->unsli3.sli3Words[7]);
                                if (!iocbq->context3)
                                        lpfc_printf_log(phba,
                                                KERN_ERR,
                                                LOG_SLI,
                                                "0344 Ring %d Cannot find "
                                                "buffer for an unsolicited "
                                                "iocb. tag 0x%x\n",
                                                pring->ringno,
                                                irsp->unsli3.sli3Words[7]);
                        }
                }
        }
        if (irsp->ulpBdeCount != 0 &&
            (irsp->ulpCommand == CMD_IOCB_RCV_CONT64_CX ||
             irsp->ulpStatus == IOSTAT_INTERMED_RSP)) {
                int found = 0;

                /* search continue save q for same XRI */
                list_for_each_entry(iocbq, &pring->iocb_continue_saveq, clist) {
                        if (iocbq->iocb.ulpContext == saveq->iocb.ulpContext) {
                                list_add_tail(&saveq->list, &iocbq->list);
                                found = 1;
                                break;
                        }
                }
                if (!found)
                        list_add_tail(&saveq->clist,
                                      &pring->iocb_continue_saveq);
                if (saveq->iocb.ulpStatus != IOSTAT_INTERMED_RSP) {
                        list_del_init(&iocbq->clist);
                        saveq = iocbq;
                        irsp = &(saveq->iocb);
                } else
                        return 0;
        }
        if ((irsp->ulpCommand == CMD_RCV_ELS_REQ64_CX) ||
            (irsp->ulpCommand == CMD_RCV_ELS_REQ_CX) ||
            (irsp->ulpCommand == CMD_IOCB_RCV_ELS64_CX)) {
                Rctl = FC_RCTL_ELS_REQ;
                Type = FC_TYPE_ELS;
        } else {
                w5p = (WORD5 *)&(saveq->iocb.un.ulpWord[5]);
                Rctl = w5p->hcsw.Rctl;
                Type = w5p->hcsw.Type;

                /* Firmware Workaround */
                if ((Rctl == 0) && (pring->ringno == LPFC_ELS_RING) &&
                        (irsp->ulpCommand == CMD_RCV_SEQUENCE64_CX ||
                         irsp->ulpCommand == CMD_IOCB_RCV_SEQ64_CX)) {
                        Rctl = FC_RCTL_ELS_REQ;
                        Type = FC_TYPE_ELS;
                        w5p->hcsw.Rctl = Rctl;
                        w5p->hcsw.Type = Type;
                }
        }

        if (!lpfc_complete_unsol_iocb(phba, pring, saveq, Rctl, Type))
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "0313 Ring %d handler: unexpected Rctl x%x "
                                "Type x%x received\n",
                                pring->ringno, Rctl, Type);

        return 1;
}

/**
 * lpfc_sli_iocbq_lookup - Find command iocb for the given response iocb
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @prspiocb: Pointer to response iocb object.
 *
 * This function looks up the iocb_lookup table to get the command iocb
 * corresponding to the given response iocb using the iotag of the
 * response iocb. This function is called with the hbalock held.
 * This function returns the command iocb object if it finds the command
 * iocb else returns NULL.
 **/
static struct lpfc_iocbq *
lpfc_sli_iocbq_lookup(struct lpfc_hba *phba,
                      struct lpfc_sli_ring *pring,
                      struct lpfc_iocbq *prspiocb)
{
        struct lpfc_iocbq *cmd_iocb = NULL;
        uint16_t iotag;

        iotag = prspiocb->iocb.ulpIoTag;

        if (iotag != 0 && iotag <= phba->sli.last_iotag) {
                cmd_iocb = phba->sli.iocbq_lookup[iotag];
                list_del_init(&cmd_iocb->list);
                pring->txcmplq_cnt--;
                return cmd_iocb;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "0317 iotag x%x is out off "
                        "range: max iotag x%x wd0 x%x\n",
                        iotag, phba->sli.last_iotag,
                        *(((uint32_t *) &prspiocb->iocb) + 7));
        return NULL;
}

/**
 * lpfc_sli_iocbq_lookup_by_tag - Find command iocb for the iotag
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @iotag: IOCB tag.
 *
 * This function looks up the iocb_lookup table to get the command iocb
 * corresponding to the given iotag. This function is called with the
 * hbalock held.
 * This function returns the command iocb object if it finds the command
 * iocb else returns NULL.
 **/
static struct lpfc_iocbq *
lpfc_sli_iocbq_lookup_by_tag(struct lpfc_hba *phba,
                             struct lpfc_sli_ring *pring, uint16_t iotag)
{
        struct lpfc_iocbq *cmd_iocb;

        if (iotag != 0 && iotag <= phba->sli.last_iotag) {
                cmd_iocb = phba->sli.iocbq_lookup[iotag];
                list_del_init(&cmd_iocb->list);
                pring->txcmplq_cnt--;
                return cmd_iocb;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "0372 iotag x%x is out off range: max iotag (x%x)\n",
                        iotag, phba->sli.last_iotag);
        return NULL;
}

/**
 * lpfc_sli_process_sol_iocb - process solicited iocb completion
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @saveq: Pointer to the response iocb to be processed.
 *
 * This function is called by the ring event handler for non-fcp
 * rings when there is a new response iocb in the response ring.
 * The caller is not required to hold any locks. This function
 * gets the command iocb associated with the response iocb and
 * calls the completion handler for the command iocb. If there
 * is no completion handler, the function will free the resources
 * associated with command iocb. If the response iocb is for
 * an already aborted command iocb, the status of the completion
 * is changed to IOSTAT_LOCAL_REJECT/IOERR_SLI_ABORTED.
 * This function always returns 1.
 **/
static int
lpfc_sli_process_sol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                          struct lpfc_iocbq *saveq)
{
        struct lpfc_iocbq *cmdiocbp;
        int rc = 1;
        unsigned long iflag;

        /* Based on the iotag field, get the cmd IOCB from the txcmplq */
        spin_lock_irqsave(&phba->hbalock, iflag);
        cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring, saveq);
        spin_unlock_irqrestore(&phba->hbalock, iflag);

        if (cmdiocbp) {
                if (cmdiocbp->iocb_cmpl) {
                        /*
                         * If an ELS command failed send an event to mgmt
                         * application.
                         */
                        if (saveq->iocb.ulpStatus &&
                             (pring->ringno == LPFC_ELS_RING) &&
                             (cmdiocbp->iocb.ulpCommand ==
                                CMD_ELS_REQUEST64_CR))
                                lpfc_send_els_failure_event(phba,
                                        cmdiocbp, saveq);

                        /*
                         * Post all ELS completions to the worker thread.
                         * All other are passed to the completion callback.
                         */
                        if (pring->ringno == LPFC_ELS_RING) {
                                if ((phba->sli_rev < LPFC_SLI_REV4) &&
                                    (cmdiocbp->iocb_flag &
                                                        LPFC_DRIVER_ABORTED)) {
                                        spin_lock_irqsave(&phba->hbalock,
                                                          iflag);
                                        cmdiocbp->iocb_flag &=
                                                ~LPFC_DRIVER_ABORTED;
                                        spin_unlock_irqrestore(&phba->hbalock,
                                                               iflag);
                                        saveq->iocb.ulpStatus =
                                                IOSTAT_LOCAL_REJECT;
                                        saveq->iocb.un.ulpWord[4] =
                                                IOERR_SLI_ABORTED;

                                        /* Firmware could still be in progress
                                         * of DMAing payload, so don't free data
                                         * buffer till after a hbeat.
                                         */
                                        spin_lock_irqsave(&phba->hbalock,
                                                          iflag);
                                        saveq->iocb_flag |= LPFC_DELAY_MEM_FREE;
                                        spin_unlock_irqrestore(&phba->hbalock,
                                                               iflag);
                                }
                                if ((phba->sli_rev == LPFC_SLI_REV4) &&
                                    (saveq->iocb_flag & LPFC_EXCHANGE_BUSY)) {
                                        /* Set cmdiocb flag for the exchange
                                         * busy so sgl (xri) will not be
                                         * released until the abort xri is
                                         * received from hba, clear the
                                         * LPFC_DRIVER_ABORTED bit in case
                                         * it was driver initiated abort.
                                         */
                                        spin_lock_irqsave(&phba->hbalock,
                                                          iflag);
                                        cmdiocbp->iocb_flag &=
                                                ~LPFC_DRIVER_ABORTED;
                                        cmdiocbp->iocb_flag |=
                                                LPFC_EXCHANGE_BUSY;
                                        spin_unlock_irqrestore(&phba->hbalock,
                                                               iflag);
                                        cmdiocbp->iocb.ulpStatus =
                                                IOSTAT_LOCAL_REJECT;
                                        cmdiocbp->iocb.un.ulpWord[4] =
                                                IOERR_ABORT_REQUESTED;
                                        /*
                                         * For SLI4, irsiocb contains NO_XRI
                                         * in sli_xritag, it shall not affect
                                         * releasing sgl (xri) process.
                                         */
                                        saveq->iocb.ulpStatus =
                                                IOSTAT_LOCAL_REJECT;
                                        saveq->iocb.un.ulpWord[4] =
                                                IOERR_SLI_ABORTED;
                                        spin_lock_irqsave(&phba->hbalock,
                                                          iflag);
                                        saveq->iocb_flag |= LPFC_DELAY_MEM_FREE;
                                        spin_unlock_irqrestore(&phba->hbalock,
                                                               iflag);
                                }
                        }
                        (cmdiocbp->iocb_cmpl) (phba, cmdiocbp, saveq);
                } else
                        lpfc_sli_release_iocbq(phba, cmdiocbp);
        } else {
                /*
                 * Unknown initiating command based on the response iotag.
                 * This could be the case on the ELS ring because of
                 * lpfc_els_abort().
                 */
                if (pring->ringno != LPFC_ELS_RING) {
                        /*
                         * Ring <ringno> handler: unexpected completion IoTag
                         * <IoTag>
                         */
                        lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                         "0322 Ring %d handler: "
                                         "unexpected completion IoTag x%x "
                                         "Data: x%x x%x x%x x%x\n",
                                         pring->ringno,
                                         saveq->iocb.ulpIoTag,
                                         saveq->iocb.ulpStatus,
                                         saveq->iocb.un.ulpWord[4],
                                         saveq->iocb.ulpCommand,
                                         saveq->iocb.ulpContext);
                }
        }

        return rc;
}

/**
 * lpfc_sli_rsp_pointers_error - Response ring pointer error handler
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function is called from the iocb ring event handlers when
 * put pointer is ahead of the get pointer for a ring. This function signal
 * an error attention condition to the worker thread and the worker
 * thread will transition the HBA to offline state.
 **/
static void
lpfc_sli_rsp_pointers_error(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno];
        /*
         * Ring <ringno> handler: portRspPut <portRspPut> is bigger than
         * rsp ring <portRspMax>
         */
        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "0312 Ring %d handler: portRspPut %d "
                        "is bigger than rsp ring %d\n",
                        pring->ringno, le32_to_cpu(pgp->rspPutInx),
                        pring->numRiocb);

        phba->link_state = LPFC_HBA_ERROR;

        /*
         * All error attention handlers are posted to
         * worker thread
         */
        phba->work_ha |= HA_ERATT;
        phba->work_hs = HS_FFER3;

        lpfc_worker_wake_up(phba);

        return;
}

/**
 * lpfc_poll_eratt - Error attention polling timer timeout handler
 * @ptr: Pointer to address of HBA context object.
 *
 * This function is invoked by the Error Attention polling timer when the
 * timer times out. It will check the SLI Error Attention register for
 * possible attention events. If so, it will post an Error Attention event
 * and wake up worker thread to process it. Otherwise, it will set up the
 * Error Attention polling timer for the next poll.
 **/
void lpfc_poll_eratt(unsigned long ptr)
{
        struct lpfc_hba *phba;
        uint32_t eratt = 0;

        phba = (struct lpfc_hba *)ptr;

        /* Check chip HA register for error event */
        eratt = lpfc_sli_check_eratt(phba);

        if (eratt)
                /* Tell the worker thread there is work to do */
                lpfc_worker_wake_up(phba);
        else
                /* Restart the timer for next eratt poll */
                mod_timer(&phba->eratt_poll, jiffies +
                                        HZ * LPFC_ERATT_POLL_INTERVAL);
        return;
}


/**
 * lpfc_sli_handle_fast_ring_event - Handle ring events on FCP ring
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @mask: Host attention register mask for this ring.
 *
 * This function is called from the interrupt context when there is a ring
 * event for the fcp ring. The caller does not hold any lock.
 * The function processes each response iocb in the response ring until it
 * finds an iocb with LE bit set and chains all the iocbs upto the iocb with
 * LE bit set. The function will call the completion handler of the command iocb
 * if the response iocb indicates a completion for a command iocb or it is
 * an abort completion. The function will call lpfc_sli_process_unsol_iocb
 * function if this is an unsolicited iocb.
 * This routine presumes LPFC_FCP_RING handling and doesn't bother
 * to check it explicitly.
 */
int
lpfc_sli_handle_fast_ring_event(struct lpfc_hba *phba,
                                struct lpfc_sli_ring *pring, uint32_t mask)
{
        struct lpfc_pgp *pgp = &phba->port_gp[pring->ringno];
        IOCB_t *irsp = NULL;
        IOCB_t *entry = NULL;
        struct lpfc_iocbq *cmdiocbq = NULL;
        struct lpfc_iocbq rspiocbq;
        uint32_t status;
        uint32_t portRspPut, portRspMax;
        int rc = 1;
        lpfc_iocb_type type;
        unsigned long iflag;
        uint32_t rsp_cmpl = 0;

        spin_lock_irqsave(&phba->hbalock, iflag);
        pring->stats.iocb_event++;

        /*
         * The next available response entry should never exceed the maximum
         * entries.  If it does, treat it as an adapter hardware error.
         */
        portRspMax = pring->numRiocb;
        portRspPut = le32_to_cpu(pgp->rspPutInx);
        if (unlikely(portRspPut >= portRspMax)) {
                lpfc_sli_rsp_pointers_error(phba, pring);
                spin_unlock_irqrestore(&phba->hbalock, iflag);
                return 1;
        }
        if (phba->fcp_ring_in_use) {
                spin_unlock_irqrestore(&phba->hbalock, iflag);
                return 1;
        } else
                phba->fcp_ring_in_use = 1;

        rmb();
        while (pring->rspidx != portRspPut) {
                /*
                 * Fetch an entry off the ring and copy it into a local data
                 * structure.  The copy involves a byte-swap since the
                 * network byte order and pci byte orders are different.
                 */
                entry = lpfc_resp_iocb(phba, pring);
                phba->last_completion_time = jiffies;

                if (++pring->rspidx >= portRspMax)
                        pring->rspidx = 0;

                lpfc_sli_pcimem_bcopy((uint32_t *) entry,
                                      (uint32_t *) &rspiocbq.iocb,
                                      phba->iocb_rsp_size);
                INIT_LIST_HEAD(&(rspiocbq.list));
                irsp = &rspiocbq.iocb;

                type = lpfc_sli_iocb_cmd_type(irsp->ulpCommand & CMD_IOCB_MASK);
                pring->stats.iocb_rsp++;
                rsp_cmpl++;

                if (unlikely(irsp->ulpStatus)) {
                        /*
                         * If resource errors reported from HBA, reduce
                         * queuedepths of the SCSI device.
                         */
                        if ((irsp->ulpStatus == IOSTAT_LOCAL_REJECT) &&
                                (irsp->un.ulpWord[4] == IOERR_NO_RESOURCES)) {
                                spin_unlock_irqrestore(&phba->hbalock, iflag);
                                phba->lpfc_rampdown_queue_depth(phba);
                                spin_lock_irqsave(&phba->hbalock, iflag);
                        }

                        /* Rsp ring <ringno> error: IOCB */
                        lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                        "0336 Rsp Ring %d error: IOCB Data: "
                                        "x%x x%x x%x x%x x%x x%x x%x x%x\n",
                                        pring->ringno,
                                        irsp->un.ulpWord[0],
                                        irsp->un.ulpWord[1],
                                        irsp->un.ulpWord[2],
                                        irsp->un.ulpWord[3],
                                        irsp->un.ulpWord[4],
                                        irsp->un.ulpWord[5],
                                        *(uint32_t *)&irsp->un1,
                                        *((uint32_t *)&irsp->un1 + 1));
                }

                switch (type) {
                case LPFC_ABORT_IOCB:
                case LPFC_SOL_IOCB:
                        /*
                         * Idle exchange closed via ABTS from port.  No iocb
                         * resources need to be recovered.
                         */
                        if (unlikely(irsp->ulpCommand == CMD_XRI_ABORTED_CX)) {
                                lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                                                "0333 IOCB cmd 0x%x"
                                                " processed. Skipping"
                                                " completion\n",
                                                irsp->ulpCommand);
                                break;
                        }

                        cmdiocbq = lpfc_sli_iocbq_lookup(phba, pring,
                                                         &rspiocbq);
                        if ((cmdiocbq) && (cmdiocbq->iocb_cmpl)) {
                                        spin_unlock_irqrestore(&phba->hbalock,
                                                               iflag);
                                        (cmdiocbq->iocb_cmpl)(phba, cmdiocbq,
                                                              &rspiocbq);
                                        spin_lock_irqsave(&phba->hbalock,
                                                          iflag);
                                }
                        break;
                case LPFC_UNSOL_IOCB:
                        spin_unlock_irqrestore(&phba->hbalock, iflag);
                        lpfc_sli_process_unsol_iocb(phba, pring, &rspiocbq);
                        spin_lock_irqsave(&phba->hbalock, iflag);
                        break;
                default:
                        if (irsp->ulpCommand == CMD_ADAPTER_MSG) {
                                char adaptermsg[LPFC_MAX_ADPTMSG];
                                memset(adaptermsg, 0, LPFC_MAX_ADPTMSG);
                                memcpy(&adaptermsg[0], (uint8_t *) irsp,
                                       MAX_MSG_DATA);
                                dev_warn(&((phba->pcidev)->dev),
                                         "lpfc%d: %s\n",
                                         phba->brd_no, adaptermsg);
                        } else {
                                /* Unknown IOCB command */
                                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                                "0334 Unknown IOCB command "
                                                "Data: x%x, x%x x%x x%x x%x\n",
                                                type, irsp->ulpCommand,
                                                irsp->ulpStatus,
                                                irsp->ulpIoTag,
                                                irsp->ulpContext);
                        }
                        break;
                }

                /*
                 * The response IOCB has been processed.  Update the ring
                 * pointer in SLIM.  If the port response put pointer has not
                 * been updated, sync the pgp->rspPutInx and fetch the new port
                 * response put pointer.
                 */
                writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx);

                if (pring->rspidx == portRspPut)
                        portRspPut = le32_to_cpu(pgp->rspPutInx);
        }

        if ((rsp_cmpl > 0) && (mask & HA_R0RE_REQ)) {
                pring->stats.iocb_rsp_full++;
                status = ((CA_R0ATT | CA_R0RE_RSP) << (pring->ringno * 4));
                writel(status, phba->CAregaddr);
                readl(phba->CAregaddr);
        }
        if ((mask & HA_R0CE_RSP) && (pring->flag & LPFC_CALL_RING_AVAILABLE)) {
                pring->flag &= ~LPFC_CALL_RING_AVAILABLE;
                pring->stats.iocb_cmd_empty++;

                /* Force update of the local copy of cmdGetInx */
                pring->local_getidx = le32_to_cpu(pgp->cmdGetInx);
                lpfc_sli_resume_iocb(phba, pring);

                if ((pring->lpfc_sli_cmd_available))
                        (pring->lpfc_sli_cmd_available) (phba, pring);

        }

        phba->fcp_ring_in_use = 0;
        spin_unlock_irqrestore(&phba->hbalock, iflag);
        return rc;
}

/**
 * lpfc_sli_sp_handle_rspiocb - Handle slow-path response iocb
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @rspiocbp: Pointer to driver response IOCB object.
 *
 * This function is called from the worker thread when there is a slow-path
 * response IOCB to process. This function chains all the response iocbs until
 * seeing the iocb with the LE bit set. The function will call
 * lpfc_sli_process_sol_iocb function if the response iocb indicates a
 * completion of a command iocb. The function will call the
 * lpfc_sli_process_unsol_iocb function if this is an unsolicited iocb.
 * The function frees the resources or calls the completion handler if this
 * iocb is an abort completion. The function returns NULL when the response
 * iocb has the LE bit set and all the chained iocbs are processed, otherwise
 * this function shall chain the iocb on to the iocb_continueq and return the
 * response iocb passed in.
 **/
static struct lpfc_iocbq *
lpfc_sli_sp_handle_rspiocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                        struct lpfc_iocbq *rspiocbp)
{
        struct lpfc_iocbq *saveq;
        struct lpfc_iocbq *cmdiocbp;
        struct lpfc_iocbq *next_iocb;
        IOCB_t *irsp = NULL;
        uint32_t free_saveq;
        uint8_t iocb_cmd_type;
        lpfc_iocb_type type;
        unsigned long iflag;
        int rc;

        spin_lock_irqsave(&phba->hbalock, iflag);
        /* First add the response iocb to the countinueq list */
        list_add_tail(&rspiocbp->list, &(pring->iocb_continueq));
        pring->iocb_continueq_cnt++;

        /* Now, determine whetehr the list is completed for processing */
        irsp = &rspiocbp->iocb;
        if (irsp->ulpLe) {
                /*
                 * By default, the driver expects to free all resources
                 * associated with this iocb completion.
                 */
                free_saveq = 1;
                saveq = list_get_first(&pring->iocb_continueq,
                                       struct lpfc_iocbq, list);
                irsp = &(saveq->iocb);
                list_del_init(&pring->iocb_continueq);
                pring->iocb_continueq_cnt = 0;

                pring->stats.iocb_rsp++;

                /*
                 * If resource errors reported from HBA, reduce
                 * queuedepths of the SCSI device.
                 */
                if ((irsp->ulpStatus == IOSTAT_LOCAL_REJECT) &&
                    (irsp->un.ulpWord[4] == IOERR_NO_RESOURCES)) {
                        spin_unlock_irqrestore(&phba->hbalock, iflag);
                        phba->lpfc_rampdown_queue_depth(phba);
                        spin_lock_irqsave(&phba->hbalock, iflag);
                }

                if (irsp->ulpStatus) {
                        /* Rsp ring <ringno> error: IOCB */
                        lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                        "0328 Rsp Ring %d error: "
                                        "IOCB Data: "
                                        "x%x x%x x%x x%x "
                                        "x%x x%x x%x x%x "
                                        "x%x x%x x%x x%x "
                                        "x%x x%x x%x x%x\n",
                                        pring->ringno,
                                        irsp->un.ulpWord[0],
                                        irsp->un.ulpWord[1],
                                        irsp->un.ulpWord[2],
                                        irsp->un.ulpWord[3],
                                        irsp->un.ulpWord[4],
                                        irsp->un.ulpWord[5],
                                        *(((uint32_t *) irsp) + 6),
                                        *(((uint32_t *) irsp) + 7),
                                        *(((uint32_t *) irsp) + 8),
                                        *(((uint32_t *) irsp) + 9),
                                        *(((uint32_t *) irsp) + 10),
                                        *(((uint32_t *) irsp) + 11),
                                        *(((uint32_t *) irsp) + 12),
                                        *(((uint32_t *) irsp) + 13),
                                        *(((uint32_t *) irsp) + 14),
                                        *(((uint32_t *) irsp) + 15));
                }

                /*
                 * Fetch the IOCB command type and call the correct completion
                 * routine. Solicited and Unsolicited IOCBs on the ELS ring
                 * get freed back to the lpfc_iocb_list by the discovery
                 * kernel thread.
                 */
                iocb_cmd_type = irsp->ulpCommand & CMD_IOCB_MASK;
                type = lpfc_sli_iocb_cmd_type(iocb_cmd_type);
                switch (type) {
                case LPFC_SOL_IOCB:
                        spin_unlock_irqrestore(&phba->hbalock, iflag);
                        rc = lpfc_sli_process_sol_iocb(phba, pring, saveq);
                        spin_lock_irqsave(&phba->hbalock, iflag);
                        break;

                case LPFC_UNSOL_IOCB:
                        spin_unlock_irqrestore(&phba->hbalock, iflag);
                        rc = lpfc_sli_process_unsol_iocb(phba, pring, saveq);
                        spin_lock_irqsave(&phba->hbalock, iflag);
                        if (!rc)
                                free_saveq = 0;
                        break;

                case LPFC_ABORT_IOCB:
                        cmdiocbp = NULL;
                        if (irsp->ulpCommand != CMD_XRI_ABORTED_CX)
                                cmdiocbp = lpfc_sli_iocbq_lookup(phba, pring,
                                                                 saveq);
                        if (cmdiocbp) {
                                /* Call the specified completion routine */
                                if (cmdiocbp->iocb_cmpl) {
                                        spin_unlock_irqrestore(&phba->hbalock,
                                                               iflag);
                                        (cmdiocbp->iocb_cmpl)(phba, cmdiocbp,
                                                              saveq);
                                        spin_lock_irqsave(&phba->hbalock,
                                                          iflag);
                                } else
                                        __lpfc_sli_release_iocbq(phba,
                                                                 cmdiocbp);
                        }
                        break;

                case LPFC_UNKNOWN_IOCB:
                        if (irsp->ulpCommand == CMD_ADAPTER_MSG) {
                                char adaptermsg[LPFC_MAX_ADPTMSG];
                                memset(adaptermsg, 0, LPFC_MAX_ADPTMSG);
                                memcpy(&adaptermsg[0], (uint8_t *)irsp,
                                       MAX_MSG_DATA);
                                dev_warn(&((phba->pcidev)->dev),
                                         "lpfc%d: %s\n",
                                         phba->brd_no, adaptermsg);
                        } else {
                                /* Unknown IOCB command */
                                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                                "0335 Unknown IOCB "
                                                "command Data: x%x "
                                                "x%x x%x x%x\n",
                                                irsp->ulpCommand,
                                                irsp->ulpStatus,
                                                irsp->ulpIoTag,
                                                irsp->ulpContext);
                        }
                        break;
                }

                if (free_saveq) {
                        list_for_each_entry_safe(rspiocbp, next_iocb,
                                                 &saveq->list, list) {
                                list_del(&rspiocbp->list);
                                __lpfc_sli_release_iocbq(phba, rspiocbp);
                        }
                        __lpfc_sli_release_iocbq(phba, saveq);
                }
                rspiocbp = NULL;
        }
        spin_unlock_irqrestore(&phba->hbalock, iflag);
        return rspiocbp;
}

/**
 * lpfc_sli_handle_slow_ring_event - Wrapper func for handling slow-path iocbs
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @mask: Host attention register mask for this ring.
 *
 * This routine wraps the actual slow_ring event process routine from the
 * API jump table function pointer from the lpfc_hba struct.
 **/
void
lpfc_sli_handle_slow_ring_event(struct lpfc_hba *phba,
                                struct lpfc_sli_ring *pring, uint32_t mask)
{
        phba->lpfc_sli_handle_slow_ring_event(phba, pring, mask);
}

/**
 * lpfc_sli_handle_slow_ring_event_s3 - Handle SLI3 ring event for non-FCP rings
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @mask: Host attention register mask for this ring.
 *
 * This function is called from the worker thread when there is a ring event
 * for non-fcp rings. The caller does not hold any lock. The function will
 * remove each response iocb in the response ring and calls the handle
 * response iocb routine (lpfc_sli_sp_handle_rspiocb) to process it.
 **/
static void
lpfc_sli_handle_slow_ring_event_s3(struct lpfc_hba *phba,
                                   struct lpfc_sli_ring *pring, uint32_t mask)
{
        struct lpfc_pgp *pgp;
        IOCB_t *entry;
        IOCB_t *irsp = NULL;
        struct lpfc_iocbq *rspiocbp = NULL;
        uint32_t portRspPut, portRspMax;
        unsigned long iflag;
        uint32_t status;

        pgp = &phba->port_gp[pring->ringno];
        spin_lock_irqsave(&phba->hbalock, iflag);
        pring->stats.iocb_event++;

        /*
         * The next available response entry should never exceed the maximum
         * entries.  If it does, treat it as an adapter hardware error.
         */
        portRspMax = pring->numRiocb;
        portRspPut = le32_to_cpu(pgp->rspPutInx);
        if (portRspPut >= portRspMax) {
                /*
                 * Ring <ringno> handler: portRspPut <portRspPut> is bigger than
                 * rsp ring <portRspMax>
                 */
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0303 Ring %d handler: portRspPut %d "
                                "is bigger than rsp ring %d\n",
                                pring->ringno, portRspPut, portRspMax);

                phba->link_state = LPFC_HBA_ERROR;
                spin_unlock_irqrestore(&phba->hbalock, iflag);

                phba->work_hs = HS_FFER3;
                lpfc_handle_eratt(phba);

                return;
        }

        rmb();
        while (pring->rspidx != portRspPut) {
                /*
                 * Build a completion list and call the appropriate handler.
                 * The process is to get the next available response iocb, get
                 * a free iocb from the list, copy the response data into the
                 * free iocb, insert to the continuation list, and update the
                 * next response index to slim.  This process makes response
                 * iocb's in the ring available to DMA as fast as possible but
                 * pays a penalty for a copy operation.  Since the iocb is
                 * only 32 bytes, this penalty is considered small relative to
                 * the PCI reads for register values and a slim write.  When
                 * the ulpLe field is set, the entire Command has been
                 * received.
                 */
                entry = lpfc_resp_iocb(phba, pring);

                phba->last_completion_time = jiffies;
                rspiocbp = __lpfc_sli_get_iocbq(phba);
                if (rspiocbp == NULL) {
                        printk(KERN_ERR "%s: out of buffers! Failing "
                               "completion.\n", __func__);
                        break;
                }

                lpfc_sli_pcimem_bcopy(entry, &rspiocbp->iocb,
                                      phba->iocb_rsp_size);
                irsp = &rspiocbp->iocb;

                if (++pring->rspidx >= portRspMax)
                        pring->rspidx = 0;

                if (pring->ringno == LPFC_ELS_RING) {
                        lpfc_debugfs_slow_ring_trc(phba,
                        "IOCB rsp ring:   wd4:x%08x wd6:x%08x wd7:x%08x",
                                *(((uint32_t *) irsp) + 4),
                                *(((uint32_t *) irsp) + 6),
                                *(((uint32_t *) irsp) + 7));
                }

                writel(pring->rspidx, &phba->host_gp[pring->ringno].rspGetInx);

                spin_unlock_irqrestore(&phba->hbalock, iflag);
                /* Handle the response IOCB */
                rspiocbp = lpfc_sli_sp_handle_rspiocb(phba, pring, rspiocbp);
                spin_lock_irqsave(&phba->hbalock, iflag);

                /*
                 * If the port response put pointer has not been updated, sync
                 * the pgp->rspPutInx in the MAILBOX_tand fetch the new port
                 * response put pointer.
                 */
                if (pring->rspidx == portRspPut) {
                        portRspPut = le32_to_cpu(pgp->rspPutInx);
                }
        } /* while (pring->rspidx != portRspPut) */

        if ((rspiocbp != NULL) && (mask & HA_R0RE_REQ)) {
                /* At least one response entry has been freed */
                pring->stats.iocb_rsp_full++;
                /* SET RxRE_RSP in Chip Att register */
                status = ((CA_R0ATT | CA_R0RE_RSP) << (pring->ringno * 4));
                writel(status, phba->CAregaddr);
                readl(phba->CAregaddr); /* flush */
        }
        if ((mask & HA_R0CE_RSP) && (pring->flag & LPFC_CALL_RING_AVAILABLE)) {
                pring->flag &= ~LPFC_CALL_RING_AVAILABLE;
                pring->stats.iocb_cmd_empty++;

                /* Force update of the local copy of cmdGetInx */
                pring->local_getidx = le32_to_cpu(pgp->cmdGetInx);
                lpfc_sli_resume_iocb(phba, pring);

                if ((pring->lpfc_sli_cmd_available))
                        (pring->lpfc_sli_cmd_available) (phba, pring);

        }

        spin_unlock_irqrestore(&phba->hbalock, iflag);
        return;
}

/**
 * lpfc_sli_handle_slow_ring_event_s4 - Handle SLI4 slow-path els events
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @mask: Host attention register mask for this ring.
 *
 * This function is called from the worker thread when there is a pending
 * ELS response iocb on the driver internal slow-path response iocb worker
 * queue. The caller does not hold any lock. The function will remove each
 * response iocb from the response worker queue and calls the handle
 * response iocb routine (lpfc_sli_sp_handle_rspiocb) to process it.
 **/
static void
lpfc_sli_handle_slow_ring_event_s4(struct lpfc_hba *phba,
                                   struct lpfc_sli_ring *pring, uint32_t mask)
{
        struct lpfc_iocbq *irspiocbq;
        struct hbq_dmabuf *dmabuf;
        struct lpfc_cq_event *cq_event;
        unsigned long iflag;

        spin_lock_irqsave(&phba->hbalock, iflag);
        phba->hba_flag &= ~HBA_SP_QUEUE_EVT;
        spin_unlock_irqrestore(&phba->hbalock, iflag);
        while (!list_empty(&phba->sli4_hba.sp_queue_event)) {
                /* Get the response iocb from the head of work queue */
                spin_lock_irqsave(&phba->hbalock, iflag);
                list_remove_head(&phba->sli4_hba.sp_queue_event,
                                 cq_event, struct lpfc_cq_event, list);
                spin_unlock_irqrestore(&phba->hbalock, iflag);

                switch (bf_get(lpfc_wcqe_c_code, &cq_event->cqe.wcqe_cmpl)) {
                case CQE_CODE_COMPL_WQE:
                        irspiocbq = container_of(cq_event, struct lpfc_iocbq,
                                                 cq_event);
                        /* Translate ELS WCQE to response IOCBQ */
                        irspiocbq = lpfc_sli4_els_wcqe_to_rspiocbq(phba,
                                                                   irspiocbq);
                        if (irspiocbq)
                                lpfc_sli_sp_handle_rspiocb(phba, pring,
                                                           irspiocbq);
                        break;
                case CQE_CODE_RECEIVE:
                        dmabuf = container_of(cq_event, struct hbq_dmabuf,
                                              cq_event);
                        lpfc_sli4_handle_received_buffer(phba, dmabuf);
                        break;
                default:
                        break;
                }
        }
}

/**
 * lpfc_sli_abort_iocb_ring - Abort all iocbs in the ring
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 *
 * This function aborts all iocbs in the given ring and frees all the iocb
 * objects in txq. This function issues an abort iocb for all the iocb commands
 * in txcmplq. The iocbs in the txcmplq is not guaranteed to complete before
 * the return of this function. The caller is not required to hold any locks.
 **/
void
lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
{
        LIST_HEAD(completions);
        struct lpfc_iocbq *iocb, *next_iocb;

        if (pring->ringno == LPFC_ELS_RING) {
                lpfc_fabric_abort_hba(phba);
        }

        /* Error everything on txq and txcmplq
         * First do the txq.
         */
        spin_lock_irq(&phba->hbalock);
        list_splice_init(&pring->txq, &completions);
        pring->txq_cnt = 0;

        /* Next issue ABTS for everything on the txcmplq */
        list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list)
                lpfc_sli_issue_abort_iotag(phba, pring, iocb);

        spin_unlock_irq(&phba->hbalock);

        /* Cancel all the IOCBs from the completions list */
        lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
                              IOERR_SLI_ABORTED);
}

/**
 * lpfc_sli_flush_fcp_rings - flush all iocbs in the fcp ring
 * @phba: Pointer to HBA context object.
 *
 * This function flushes all iocbs in the fcp ring and frees all the iocb
 * objects in txq and txcmplq. This function will not issue abort iocbs
 * for all the iocb commands in txcmplq, they will just be returned with
 * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
 * slot has been permanently disabled.
 **/
void
lpfc_sli_flush_fcp_rings(struct lpfc_hba *phba)
{
        LIST_HEAD(txq);
        LIST_HEAD(txcmplq);
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_sli_ring  *pring;

        /* Currently, only one fcp ring */
        pring = &psli->ring[psli->fcp_ring];

        spin_lock_irq(&phba->hbalock);
        /* Retrieve everything on txq */
        list_splice_init(&pring->txq, &txq);
        pring->txq_cnt = 0;

        /* Retrieve everything on the txcmplq */
        list_splice_init(&pring->txcmplq, &txcmplq);
        pring->txcmplq_cnt = 0;
        spin_unlock_irq(&phba->hbalock);

        /* Flush the txq */
        lpfc_sli_cancel_iocbs(phba, &txq, IOSTAT_LOCAL_REJECT,
                              IOERR_SLI_DOWN);

        /* Flush the txcmpq */
        lpfc_sli_cancel_iocbs(phba, &txcmplq, IOSTAT_LOCAL_REJECT,
                              IOERR_SLI_DOWN);
}

/**
 * lpfc_sli_brdready_s3 - Check for sli3 host ready status
 * @phba: Pointer to HBA context object.
 * @mask: Bit mask to be checked.
 *
 * This function reads the host status register and compares
 * with the provided bit mask to check if HBA completed
 * the restart. This function will wait in a loop for the
 * HBA to complete restart. If the HBA does not restart within
 * 15 iterations, the function will reset the HBA again. The
 * function returns 1 when HBA fail to restart otherwise returns
 * zero.
 **/
static int
lpfc_sli_brdready_s3(struct lpfc_hba *phba, uint32_t mask)
{
        uint32_t status;
        int i = 0;
        int retval = 0;

        /* Read the HBA Host Status Register */
        status = readl(phba->HSregaddr);

        /*
         * Check status register every 100ms for 5 retries, then every
         * 500ms for 5, then every 2.5 sec for 5, then reset board and
         * every 2.5 sec for 4.
         * Break our of the loop if errors occurred during init.
         */
        while (((status & mask) != mask) &&
               !(status & HS_FFERM) &&
               i++ < 20) {

                if (i <= 5)
                        msleep(10);
                else if (i <= 10)
                        msleep(500);
                else
                        msleep(2500);

                if (i == 15) {
                                /* Do post */
                        phba->pport->port_state = LPFC_VPORT_UNKNOWN;
                        lpfc_sli_brdrestart(phba);
                }
                /* Read the HBA Host Status Register */
                status = readl(phba->HSregaddr);
        }

        /* Check to see if any errors occurred during init */
        if ((status & HS_FFERM) || (i >= 20)) {
                phba->link_state = LPFC_HBA_ERROR;
                retval = 1;
        }

        return retval;
}

/**
 * lpfc_sli_brdready_s4 - Check for sli4 host ready status
 * @phba: Pointer to HBA context object.
 * @mask: Bit mask to be checked.
 *
 * This function checks the host status register to check if HBA is
 * ready. This function will wait in a loop for the HBA to be ready
 * If the HBA is not ready , the function will will reset the HBA PCI
 * function again. The function returns 1 when HBA fail to be ready
 * otherwise returns zero.
 **/
static int
lpfc_sli_brdready_s4(struct lpfc_hba *phba, uint32_t mask)
{
        uint32_t status;
        int retval = 0;

        /* Read the HBA Host Status Register */
        status = lpfc_sli4_post_status_check(phba);

        if (status) {
                phba->pport->port_state = LPFC_VPORT_UNKNOWN;
                lpfc_sli_brdrestart(phba);
                status = lpfc_sli4_post_status_check(phba);
        }

        /* Check to see if any errors occurred during init */
        if (status) {
                phba->link_state = LPFC_HBA_ERROR;
                retval = 1;
        } else
                phba->sli4_hba.intr_enable = 0;

        return retval;
}

/**
 * lpfc_sli_brdready - Wrapper func for checking the hba readyness
 * @phba: Pointer to HBA context object.
 * @mask: Bit mask to be checked.
 *
 * This routine wraps the actual SLI3 or SLI4 hba readyness check routine
 * from the API jump table function pointer from the lpfc_hba struct.
 **/
int
lpfc_sli_brdready(struct lpfc_hba *phba, uint32_t mask)
{
        return phba->lpfc_sli_brdready(phba, mask);
}

#define BARRIER_TEST_PATTERN (0xdeadbeef)

/**
 * lpfc_reset_barrier - Make HBA ready for HBA reset
 * @phba: Pointer to HBA context object.
 *
 * This function is called before resetting an HBA. This
 * function requests HBA to quiesce DMAs before a reset.
 **/
void lpfc_reset_barrier(struct lpfc_hba *phba)
{
        uint32_t __iomem *resp_buf;
        uint32_t __iomem *mbox_buf;
        volatile uint32_t mbox;
        uint32_t hc_copy;
        int  i;
        uint8_t hdrtype;

        pci_read_config_byte(phba->pcidev, PCI_HEADER_TYPE, &hdrtype);
        if (hdrtype != 0x80 ||
            (FC_JEDEC_ID(phba->vpd.rev.biuRev) != HELIOS_JEDEC_ID &&
             FC_JEDEC_ID(phba->vpd.rev.biuRev) != THOR_JEDEC_ID))
                return;

        /*
         * Tell the other part of the chip to suspend temporarily all
         * its DMA activity.
         */
        resp_buf = phba->MBslimaddr;

        /* Disable the error attention */
        hc_copy = readl(phba->HCregaddr);
        writel((hc_copy & ~HC_ERINT_ENA), phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */
        phba->link_flag |= LS_IGNORE_ERATT;

        if (readl(phba->HAregaddr) & HA_ERATT) {
                /* Clear Chip error bit */
                writel(HA_ERATT, phba->HAregaddr);
                phba->pport->stopped = 1;
        }

        mbox = 0;
        ((MAILBOX_t *)&mbox)->mbxCommand = MBX_KILL_BOARD;
        ((MAILBOX_t *)&mbox)->mbxOwner = OWN_CHIP;

        writel(BARRIER_TEST_PATTERN, (resp_buf + 1));
        mbox_buf = phba->MBslimaddr;
        writel(mbox, mbox_buf);

        for (i = 0;
             readl(resp_buf + 1) != ~(BARRIER_TEST_PATTERN) && i < 50; i++)
                mdelay(1);

        if (readl(resp_buf + 1) != ~(BARRIER_TEST_PATTERN)) {
                if (phba->sli.sli_flag & LPFC_SLI_ACTIVE ||
                    phba->pport->stopped)
                        goto restore_hc;
                else
                        goto clear_errat;
        }

        ((MAILBOX_t *)&mbox)->mbxOwner = OWN_HOST;
        for (i = 0; readl(resp_buf) != mbox &&  i < 500; i++)
                mdelay(1);

clear_errat:

        while (!(readl(phba->HAregaddr) & HA_ERATT) && ++i < 500)
                mdelay(1);

        if (readl(phba->HAregaddr) & HA_ERATT) {
                writel(HA_ERATT, phba->HAregaddr);
                phba->pport->stopped = 1;
        }

restore_hc:
        phba->link_flag &= ~LS_IGNORE_ERATT;
        writel(hc_copy, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */
}

/**
 * lpfc_sli_brdkill - Issue a kill_board mailbox command
 * @phba: Pointer to HBA context object.
 *
 * This function issues a kill_board mailbox command and waits for
 * the error attention interrupt. This function is called for stopping
 * the firmware processing. The caller is not required to hold any
 * locks. This function calls lpfc_hba_down_post function to free
 * any pending commands after the kill. The function will return 1 when it
 * fails to kill the board else will return 0.
 **/
int
lpfc_sli_brdkill(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli;
        LPFC_MBOXQ_t *pmb;
        uint32_t status;
        uint32_t ha_copy;
        int retval;
        int i = 0;

        psli = &phba->sli;

        /* Kill HBA */
        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                        "0329 Kill HBA Data: x%x x%x\n",
                        phba->pport->port_state, psli->sli_flag);

        pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb)
                return 1;

        /* Disable the error attention */
        spin_lock_irq(&phba->hbalock);
        status = readl(phba->HCregaddr);
        status &= ~HC_ERINT_ENA;
        writel(status, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */
        phba->link_flag |= LS_IGNORE_ERATT;
        spin_unlock_irq(&phba->hbalock);

        lpfc_kill_board(phba, pmb);
        pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        retval = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);

        if (retval != MBX_SUCCESS) {
                if (retval != MBX_BUSY)
                        mempool_free(pmb, phba->mbox_mem_pool);
                spin_lock_irq(&phba->hbalock);
                phba->link_flag &= ~LS_IGNORE_ERATT;
                spin_unlock_irq(&phba->hbalock);
                return 1;
        }

        spin_lock_irq(&phba->hbalock);
        psli->sli_flag &= ~LPFC_SLI_ACTIVE;
        spin_unlock_irq(&phba->hbalock);

        mempool_free(pmb, phba->mbox_mem_pool);

        /* There is no completion for a KILL_BOARD mbox cmd. Check for an error
         * attention every 100ms for 3 seconds. If we don't get ERATT after
         * 3 seconds we still set HBA_ERROR state because the status of the
         * board is now undefined.
         */
        ha_copy = readl(phba->HAregaddr);

        while ((i++ < 30) && !(ha_copy & HA_ERATT)) {
                mdelay(100);
                ha_copy = readl(phba->HAregaddr);
        }

        del_timer_sync(&psli->mbox_tmo);
        if (ha_copy & HA_ERATT) {
                writel(HA_ERATT, phba->HAregaddr);
                phba->pport->stopped = 1;
        }
        spin_lock_irq(&phba->hbalock);
        psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
        psli->mbox_active = NULL;
        phba->link_flag &= ~LS_IGNORE_ERATT;
        spin_unlock_irq(&phba->hbalock);

        lpfc_hba_down_post(phba);
        phba->link_state = LPFC_HBA_ERROR;

        return ha_copy & HA_ERATT ? 0 : 1;
}

/**
 * lpfc_sli_brdreset - Reset a sli-2 or sli-3 HBA
 * @phba: Pointer to HBA context object.
 *
 * This function resets the HBA by writing HC_INITFF to the control
 * register. After the HBA resets, this function resets all the iocb ring
 * indices. This function disables PCI layer parity checking during
 * the reset.
 * This function returns 0 always.
 * The caller is not required to hold any locks.
 **/
int
lpfc_sli_brdreset(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli;
        struct lpfc_sli_ring *pring;
        uint16_t cfg_value;
        int i;

        psli = &phba->sli;

        /* Reset HBA */
        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                        "0325 Reset HBA Data: x%x x%x\n",
                        phba->pport->port_state, psli->sli_flag);

        /* perform board reset */
        phba->fc_eventTag = 0;
        phba->link_events = 0;
        phba->pport->fc_myDID = 0;
        phba->pport->fc_prevDID = 0;

        /* Turn off parity checking and serr during the physical reset */
        pci_read_config_word(phba->pcidev, PCI_COMMAND, &cfg_value);
        pci_write_config_word(phba->pcidev, PCI_COMMAND,
                              (cfg_value &
                               ~(PCI_COMMAND_PARITY | PCI_COMMAND_SERR)));

        psli->sli_flag &= ~(LPFC_SLI_ACTIVE | LPFC_PROCESS_LA);

        /* Now toggle INITFF bit in the Host Control Register */
        writel(HC_INITFF, phba->HCregaddr);
        mdelay(1);
        readl(phba->HCregaddr); /* flush */
        writel(0, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */

        /* Restore PCI cmd register */
        pci_write_config_word(phba->pcidev, PCI_COMMAND, cfg_value);

        /* Initialize relevant SLI info */
        for (i = 0; i < psli->num_rings; i++) {
                pring = &psli->ring[i];
                pring->flag = 0;
                pring->rspidx = 0;
                pring->next_cmdidx  = 0;
                pring->local_getidx = 0;
                pring->cmdidx = 0;
                pring->missbufcnt = 0;
        }

        phba->link_state = LPFC_WARM_START;
        return 0;
}

/**
 * lpfc_sli4_brdreset - Reset a sli-4 HBA
 * @phba: Pointer to HBA context object.
 *
 * This function resets a SLI4 HBA. This function disables PCI layer parity
 * checking during resets the device. The caller is not required to hold
 * any locks.
 *
 * This function returns 0 always.
 **/
int
lpfc_sli4_brdreset(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;
        uint16_t cfg_value;
        uint8_t qindx;

        /* Reset HBA */
        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                        "0295 Reset HBA Data: x%x x%x\n",
                        phba->pport->port_state, psli->sli_flag);

        /* perform board reset */
        phba->fc_eventTag = 0;
        phba->link_events = 0;
        phba->pport->fc_myDID = 0;
        phba->pport->fc_prevDID = 0;

        /* Turn off parity checking and serr during the physical reset */
        pci_read_config_word(phba->pcidev, PCI_COMMAND, &cfg_value);
        pci_write_config_word(phba->pcidev, PCI_COMMAND,
                              (cfg_value &
                              ~(PCI_COMMAND_PARITY | PCI_COMMAND_SERR)));

        spin_lock_irq(&phba->hbalock);
        psli->sli_flag &= ~(LPFC_PROCESS_LA);
        phba->fcf.fcf_flag = 0;
        /* Clean up the child queue list for the CQs */
        list_del_init(&phba->sli4_hba.mbx_wq->list);
        list_del_init(&phba->sli4_hba.els_wq->list);
        list_del_init(&phba->sli4_hba.hdr_rq->list);
        list_del_init(&phba->sli4_hba.dat_rq->list);
        list_del_init(&phba->sli4_hba.mbx_cq->list);
        list_del_init(&phba->sli4_hba.els_cq->list);
        for (qindx = 0; qindx < phba->cfg_fcp_wq_count; qindx++)
                list_del_init(&phba->sli4_hba.fcp_wq[qindx]->list);
        for (qindx = 0; qindx < phba->cfg_fcp_eq_count; qindx++)
                list_del_init(&phba->sli4_hba.fcp_cq[qindx]->list);
        spin_unlock_irq(&phba->hbalock);

        /* Now physically reset the device */
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0389 Performing PCI function reset!\n");
        /* Perform FCoE PCI function reset */
        lpfc_pci_function_reset(phba);

        return 0;
}

/**
 * lpfc_sli_brdrestart_s3 - Restart a sli-3 hba
 * @phba: Pointer to HBA context object.
 *
 * This function is called in the SLI initialization code path to
 * restart the HBA. The caller is not required to hold any lock.
 * This function writes MBX_RESTART mailbox command to the SLIM and
 * resets the HBA. At the end of the function, it calls lpfc_hba_down_post
 * function to free any pending commands. The function enables
 * POST only during the first initialization. The function returns zero.
 * The function does not guarantee completion of MBX_RESTART mailbox
 * command before the return of this function.
 **/
static int
lpfc_sli_brdrestart_s3(struct lpfc_hba *phba)
{
        MAILBOX_t *mb;
        struct lpfc_sli *psli;
        volatile uint32_t word0;
        void __iomem *to_slim;
        uint32_t hba_aer_enabled;

        spin_lock_irq(&phba->hbalock);

        /* Take PCIe device Advanced Error Reporting (AER) state */
        hba_aer_enabled = phba->hba_flag & HBA_AER_ENABLED;

        psli = &phba->sli;

        /* Restart HBA */
        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                        "0337 Restart HBA Data: x%x x%x\n",
                        phba->pport->port_state, psli->sli_flag);

        word0 = 0;
        mb = (MAILBOX_t *) &word0;
        mb->mbxCommand = MBX_RESTART;
        mb->mbxHc = 1;

        lpfc_reset_barrier(phba);

        to_slim = phba->MBslimaddr;
        writel(*(uint32_t *) mb, to_slim);
        readl(to_slim); /* flush */

        /* Only skip post after fc_ffinit is completed */
        if (phba->pport->port_state)
                word0 = 1;      /* This is really setting up word1 */
        else
                word0 = 0;      /* This is really setting up word1 */
        to_slim = phba->MBslimaddr + sizeof (uint32_t);
        writel(*(uint32_t *) mb, to_slim);
        readl(to_slim); /* flush */

        lpfc_sli_brdreset(phba);
        phba->pport->stopped = 0;
        phba->link_state = LPFC_INIT_START;
        phba->hba_flag = 0;
        spin_unlock_irq(&phba->hbalock);

        memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets));
        psli->stats_start = get_seconds();

        /* Give the INITFF and Post time to settle. */
        mdelay(100);

        /* Reset HBA AER if it was enabled, note hba_flag was reset above */
        if (hba_aer_enabled)
                pci_disable_pcie_error_reporting(phba->pcidev);

        lpfc_hba_down_post(phba);

        return 0;
}

/**
 * lpfc_sli_brdrestart_s4 - Restart the sli-4 hba
 * @phba: Pointer to HBA context object.
 *
 * This function is called in the SLI initialization code path to restart
 * a SLI4 HBA. The caller is not required to hold any lock.
 * At the end of the function, it calls lpfc_hba_down_post function to
 * free any pending commands.
 **/
static int
lpfc_sli_brdrestart_s4(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;


        /* Restart HBA */
        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                        "0296 Restart HBA Data: x%x x%x\n",
                        phba->pport->port_state, psli->sli_flag);

        lpfc_sli4_brdreset(phba);

        spin_lock_irq(&phba->hbalock);
        phba->pport->stopped = 0;
        phba->link_state = LPFC_INIT_START;
        phba->hba_flag = 0;
        spin_unlock_irq(&phba->hbalock);

        memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets));
        psli->stats_start = get_seconds();

        lpfc_hba_down_post(phba);

        return 0;
}

/**
 * lpfc_sli_brdrestart - Wrapper func for restarting hba
 * @phba: Pointer to HBA context object.
 *
 * This routine wraps the actual SLI3 or SLI4 hba restart routine from the
 * API jump table function pointer from the lpfc_hba struct.
**/
int
lpfc_sli_brdrestart(struct lpfc_hba *phba)
{
        return phba->lpfc_sli_brdrestart(phba);
}

/**
 * lpfc_sli_chipset_init - Wait for the restart of the HBA after a restart
 * @phba: Pointer to HBA context object.
 *
 * This function is called after a HBA restart to wait for successful
 * restart of the HBA. Successful restart of the HBA is indicated by
 * HS_FFRDY and HS_MBRDY bits. If the HBA fails to restart even after 15
 * iteration, the function will restart the HBA again. The function returns
 * zero if HBA successfully restarted else returns negative error code.
 **/
static int
lpfc_sli_chipset_init(struct lpfc_hba *phba)
{
        uint32_t status, i = 0;

        /* Read the HBA Host Status Register */
        status = readl(phba->HSregaddr);

        /* Check status register to see what current state is */
        i = 0;
        while ((status & (HS_FFRDY | HS_MBRDY)) != (HS_FFRDY | HS_MBRDY)) {

                /* Check every 100ms for 5 retries, then every 500ms for 5, then
                 * every 2.5 sec for 5, then reset board and every 2.5 sec for
                 * 4.
                 */
                if (i++ >= 20) {
                        /* Adapter failed to init, timeout, status reg
                           <status> */
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0436 Adapter failed to init, "
                                        "timeout, status reg x%x, "
                                        "FW Data: A8 x%x AC x%x\n", status,
                                        readl(phba->MBslimaddr + 0xa8),
                                        readl(phba->MBslimaddr + 0xac));
                        phba->link_state = LPFC_HBA_ERROR;
                        return -ETIMEDOUT;
                }

                /* Check to see if any errors occurred during init */
                if (status & HS_FFERM) {
                        /* ERROR: During chipset initialization */
                        /* Adapter failed to init, chipset, status reg
                           <status> */
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0437 Adapter failed to init, "
                                        "chipset, status reg x%x, "
                                        "FW Data: A8 x%x AC x%x\n", status,
                                        readl(phba->MBslimaddr + 0xa8),
                                        readl(phba->MBslimaddr + 0xac));
                        phba->link_state = LPFC_HBA_ERROR;
                        return -EIO;
                }

                if (i <= 5) {
                        msleep(10);
                } else if (i <= 10) {
                        msleep(500);
                } else {
                        msleep(2500);
                }

                if (i == 15) {
                                /* Do post */
                        phba->pport->port_state = LPFC_VPORT_UNKNOWN;
                        lpfc_sli_brdrestart(phba);
                }
                /* Read the HBA Host Status Register */
                status = readl(phba->HSregaddr);
        }

        /* Check to see if any errors occurred during init */
        if (status & HS_FFERM) {
                /* ERROR: During chipset initialization */
                /* Adapter failed to init, chipset, status reg <status> */
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0438 Adapter failed to init, chipset, "
                                "status reg x%x, "
                                "FW Data: A8 x%x AC x%x\n", status,
                                readl(phba->MBslimaddr + 0xa8),
                                readl(phba->MBslimaddr + 0xac));
                phba->link_state = LPFC_HBA_ERROR;
                return -EIO;
        }

        /* Clear all interrupt enable conditions */
        writel(0, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */

        /* setup host attn register */
        writel(0xffffffff, phba->HAregaddr);
        readl(phba->HAregaddr); /* flush */
        return 0;
}

/**
 * lpfc_sli_hbq_count - Get the number of HBQs to be configured
 *
 * This function calculates and returns the number of HBQs required to be
 * configured.
 **/
int
lpfc_sli_hbq_count(void)
{
        return ARRAY_SIZE(lpfc_hbq_defs);
}

/**
 * lpfc_sli_hbq_entry_count - Calculate total number of hbq entries
 *
 * This function adds the number of hbq entries in every HBQ to get
 * the total number of hbq entries required for the HBA and returns
 * the total count.
 **/
static int
lpfc_sli_hbq_entry_count(void)
{
        int  hbq_count = lpfc_sli_hbq_count();
        int  count = 0;
        int  i;

        for (i = 0; i < hbq_count; ++i)
                count += lpfc_hbq_defs[i]->entry_count;
        return count;
}

/**
 * lpfc_sli_hbq_size - Calculate memory required for all hbq entries
 *
 * This function calculates amount of memory required for all hbq entries
 * to be configured and returns the total memory required.
 **/
int
lpfc_sli_hbq_size(void)
{
        return lpfc_sli_hbq_entry_count() * sizeof(struct lpfc_hbq_entry);
}

/**
 * lpfc_sli_hbq_setup - configure and initialize HBQs
 * @phba: Pointer to HBA context object.
 *
 * This function is called during the SLI initialization to configure
 * all the HBQs and post buffers to the HBQ. The caller is not
 * required to hold any locks. This function will return zero if successful
 * else it will return negative error code.
 **/
static int
lpfc_sli_hbq_setup(struct lpfc_hba *phba)
{
        int  hbq_count = lpfc_sli_hbq_count();
        LPFC_MBOXQ_t *pmb;
        MAILBOX_t *pmbox;
        uint32_t hbqno;
        uint32_t hbq_entry_index;

                                /* Get a Mailbox buffer to setup mailbox
                                 * commands for HBA initialization
                                 */
        pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);

        if (!pmb)
                return -ENOMEM;

        pmbox = &pmb->u.mb;

        /* Initialize the struct lpfc_sli_hbq structure for each hbq */
        phba->link_state = LPFC_INIT_MBX_CMDS;
        phba->hbq_in_use = 1;

        hbq_entry_index = 0;
        for (hbqno = 0; hbqno < hbq_count; ++hbqno) {
                phba->hbqs[hbqno].next_hbqPutIdx = 0;
                phba->hbqs[hbqno].hbqPutIdx      = 0;
                phba->hbqs[hbqno].local_hbqGetIdx   = 0;
                phba->hbqs[hbqno].entry_count =
                        lpfc_hbq_defs[hbqno]->entry_count;
                lpfc_config_hbq(phba, hbqno, lpfc_hbq_defs[hbqno],
                        hbq_entry_index, pmb);
                hbq_entry_index += phba->hbqs[hbqno].entry_count;

                if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
                        /* Adapter failed to init, mbxCmd <cmd> CFG_RING,
                           mbxStatus <status>, ring <num> */

                        lpfc_printf_log(phba, KERN_ERR,
                                        LOG_SLI | LOG_VPORT,
                                        "1805 Adapter failed to init. "
                                        "Data: x%x x%x x%x\n",
                                        pmbox->mbxCommand,
                                        pmbox->mbxStatus, hbqno);

                        phba->link_state = LPFC_HBA_ERROR;
                        mempool_free(pmb, phba->mbox_mem_pool);
                        return ENXIO;
                }
        }
        phba->hbq_count = hbq_count;

        mempool_free(pmb, phba->mbox_mem_pool);

        /* Initially populate or replenish the HBQs */
        for (hbqno = 0; hbqno < hbq_count; ++hbqno)
                lpfc_sli_hbqbuf_init_hbqs(phba, hbqno);
        return 0;
}

/**
 * lpfc_sli4_rb_setup - Initialize and post RBs to HBA
 * @phba: Pointer to HBA context object.
 *
 * This function is called during the SLI initialization to configure
 * all the HBQs and post buffers to the HBQ. The caller is not
 * required to hold any locks. This function will return zero if successful
 * else it will return negative error code.
 **/
static int
lpfc_sli4_rb_setup(struct lpfc_hba *phba)
{
        phba->hbq_in_use = 1;
        phba->hbqs[0].entry_count = lpfc_hbq_defs[0]->entry_count;
        phba->hbq_count = 1;
        /* Initially populate or replenish the HBQs */
        lpfc_sli_hbqbuf_init_hbqs(phba, 0);
        return 0;
}

/**
 * lpfc_sli_config_port - Issue config port mailbox command
 * @phba: Pointer to HBA context object.
 * @sli_mode: sli mode - 2/3
 *
 * This function is called by the sli intialization code path
 * to issue config_port mailbox command. This function restarts the
 * HBA firmware and issues a config_port mailbox command to configure
 * the SLI interface in the sli mode specified by sli_mode
 * variable. The caller is not required to hold any locks.
 * The function returns 0 if successful, else returns negative error
 * code.
 **/
int
lpfc_sli_config_port(struct lpfc_hba *phba, int sli_mode)
{
        LPFC_MBOXQ_t *pmb;
        uint32_t resetcount = 0, rc = 0, done = 0;

        pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                phba->link_state = LPFC_HBA_ERROR;
                return -ENOMEM;
        }

        phba->sli_rev = sli_mode;
        while (resetcount < 2 && !done) {
                spin_lock_irq(&phba->hbalock);
                phba->sli.sli_flag |= LPFC_SLI_MBOX_ACTIVE;
                spin_unlock_irq(&phba->hbalock);
                phba->pport->port_state = LPFC_VPORT_UNKNOWN;
                lpfc_sli_brdrestart(phba);
                rc = lpfc_sli_chipset_init(phba);
                if (rc)
                        break;

                spin_lock_irq(&phba->hbalock);
                phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                spin_unlock_irq(&phba->hbalock);
                resetcount++;

                /* Call pre CONFIG_PORT mailbox command initialization.  A
                 * value of 0 means the call was successful.  Any other
                 * nonzero value is a failure, but if ERESTART is returned,
                 * the driver may reset the HBA and try again.
                 */
                rc = lpfc_config_port_prep(phba);
                if (rc == -ERESTART) {
                        phba->link_state = LPFC_LINK_UNKNOWN;
                        continue;
                } else if (rc)
                        break;
                phba->link_state = LPFC_INIT_MBX_CMDS;
                lpfc_config_port(phba, pmb);
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
                phba->sli3_options &= ~(LPFC_SLI3_NPIV_ENABLED |
                                        LPFC_SLI3_HBQ_ENABLED |
                                        LPFC_SLI3_CRP_ENABLED |
                                        LPFC_SLI3_INB_ENABLED |
                                        LPFC_SLI3_BG_ENABLED);
                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0442 Adapter failed to init, mbxCmd x%x "
                                "CONFIG_PORT, mbxStatus x%x Data: x%x\n",
                                pmb->u.mb.mbxCommand, pmb->u.mb.mbxStatus, 0);
                        spin_lock_irq(&phba->hbalock);
                        phba->sli.sli_flag &= ~LPFC_SLI_ACTIVE;
                        spin_unlock_irq(&phba->hbalock);
                        rc = -ENXIO;
                } else {
                        /* Allow asynchronous mailbox command to go through */
                        spin_lock_irq(&phba->hbalock);
                        phba->sli.sli_flag &= ~LPFC_SLI_ASYNC_MBX_BLK;
                        spin_unlock_irq(&phba->hbalock);
                        done = 1;
                }
        }
        if (!done) {
                rc = -EINVAL;
                goto do_prep_failed;
        }
        if (pmb->u.mb.un.varCfgPort.sli_mode == 3) {
                if (!pmb->u.mb.un.varCfgPort.cMA) {
                        rc = -ENXIO;
                        goto do_prep_failed;
                }
                if (phba->max_vpi && pmb->u.mb.un.varCfgPort.gmv) {
                        phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
                        phba->max_vpi = pmb->u.mb.un.varCfgPort.max_vpi;
                        phba->max_vports = (phba->max_vpi > phba->max_vports) ?
                                phba->max_vpi : phba->max_vports;

                } else
                        phba->max_vpi = 0;
                if (pmb->u.mb.un.varCfgPort.gdss)
                        phba->sli3_options |= LPFC_SLI3_DSS_ENABLED;
                if (pmb->u.mb.un.varCfgPort.gerbm)
                        phba->sli3_options |= LPFC_SLI3_HBQ_ENABLED;
                if (pmb->u.mb.un.varCfgPort.gcrp)
                        phba->sli3_options |= LPFC_SLI3_CRP_ENABLED;
                if (pmb->u.mb.un.varCfgPort.ginb) {
                        phba->sli3_options |= LPFC_SLI3_INB_ENABLED;
                        phba->hbq_get = phba->mbox->us.s3_inb_pgp.hbq_get;
                        phba->port_gp = phba->mbox->us.s3_inb_pgp.port;
                        phba->inb_ha_copy = &phba->mbox->us.s3_inb_pgp.ha_copy;
                        phba->inb_counter = &phba->mbox->us.s3_inb_pgp.counter;
                        phba->inb_last_counter =
                                        phba->mbox->us.s3_inb_pgp.counter;
                } else {
                        phba->hbq_get = phba->mbox->us.s3_pgp.hbq_get;
                        phba->port_gp = phba->mbox->us.s3_pgp.port;
                        phba->inb_ha_copy = NULL;
                        phba->inb_counter = NULL;
                }

                if (phba->cfg_enable_bg) {
                        if (pmb->u.mb.un.varCfgPort.gbg)
                                phba->sli3_options |= LPFC_SLI3_BG_ENABLED;
                        else
                                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                                "0443 Adapter did not grant "
                                                "BlockGuard\n");
                }
        } else {
                phba->hbq_get = NULL;
                phba->port_gp = phba->mbox->us.s2.port;
                phba->inb_ha_copy = NULL;
                phba->inb_counter = NULL;
                phba->max_vpi = 0;
        }
do_prep_failed:
        mempool_free(pmb, phba->mbox_mem_pool);
        return rc;
}


/**
 * lpfc_sli_hba_setup - SLI intialization function
 * @phba: Pointer to HBA context object.
 *
 * This function is the main SLI intialization function. This function
 * is called by the HBA intialization code, HBA reset code and HBA
 * error attention handler code. Caller is not required to hold any
 * locks. This function issues config_port mailbox command to configure
 * the SLI, setup iocb rings and HBQ rings. In the end the function
 * calls the config_port_post function to issue init_link mailbox
 * command and to start the discovery. The function will return zero
 * if successful, else it will return negative error code.
 **/
int
lpfc_sli_hba_setup(struct lpfc_hba *phba)
{
        uint32_t rc;
        int  mode = 3;

        switch (lpfc_sli_mode) {
        case 2:
                if (phba->cfg_enable_npiv) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT,
                                "1824 NPIV enabled: Override lpfc_sli_mode "
                                "parameter (%d) to auto (0).\n",
                                lpfc_sli_mode);
                        break;
                }
                mode = 2;
                break;
        case 0:
        case 3:
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT,
                                "1819 Unrecognized lpfc_sli_mode "
                                "parameter: %d.\n", lpfc_sli_mode);

                break;
        }

        rc = lpfc_sli_config_port(phba, mode);

        if (rc && lpfc_sli_mode == 3)
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT | LOG_VPORT,
                                "1820 Unable to select SLI-3.  "
                                "Not supported by adapter.\n");
        if (rc && mode != 2)
                rc = lpfc_sli_config_port(phba, 2);
        if (rc)
                goto lpfc_sli_hba_setup_error;

        /* Enable PCIe device Advanced Error Reporting (AER) if configured */
        if (phba->cfg_aer_support == 1 && !(phba->hba_flag & HBA_AER_ENABLED)) {
                rc = pci_enable_pcie_error_reporting(phba->pcidev);
                if (!rc) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                        "2709 This device supports "
                                        "Advanced Error Reporting (AER)\n");
                        spin_lock_irq(&phba->hbalock);
                        phba->hba_flag |= HBA_AER_ENABLED;
                        spin_unlock_irq(&phba->hbalock);
                } else {
                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                        "2708 This device does not support "
                                        "Advanced Error Reporting (AER)\n");
                        phba->cfg_aer_support = 0;
                }
        }

        if (phba->sli_rev == 3) {
                phba->iocb_cmd_size = SLI3_IOCB_CMD_SIZE;
                phba->iocb_rsp_size = SLI3_IOCB_RSP_SIZE;
        } else {
                phba->iocb_cmd_size = SLI2_IOCB_CMD_SIZE;
                phba->iocb_rsp_size = SLI2_IOCB_RSP_SIZE;
                phba->sli3_options = 0;
        }

        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0444 Firmware in SLI %x mode. Max_vpi %d\n",
                        phba->sli_rev, phba->max_vpi);
        rc = lpfc_sli_ring_map(phba);

        if (rc)
                goto lpfc_sli_hba_setup_error;

        /* Init HBQs */
        if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
                rc = lpfc_sli_hbq_setup(phba);
                if (rc)
                        goto lpfc_sli_hba_setup_error;
        }
        spin_lock_irq(&phba->hbalock);
        phba->sli.sli_flag |= LPFC_PROCESS_LA;
        spin_unlock_irq(&phba->hbalock);

        rc = lpfc_config_port_post(phba);
        if (rc)
                goto lpfc_sli_hba_setup_error;

        return rc;

lpfc_sli_hba_setup_error:
        phba->link_state = LPFC_HBA_ERROR;
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0445 Firmware initialization failed\n");
        return rc;
}

/**
 * lpfc_sli4_read_fcoe_params - Read fcoe params from conf region
 * @phba: Pointer to HBA context object.
 * @mboxq: mailbox pointer.
 * This function issue a dump mailbox command to read config region
 * 23 and parse the records in the region and populate driver
 * data structure.
 **/
static int
lpfc_sli4_read_fcoe_params(struct lpfc_hba *phba,
                LPFC_MBOXQ_t *mboxq)
{
        struct lpfc_dmabuf *mp;
        struct lpfc_mqe *mqe;
        uint32_t data_length;
        int rc;

        /* Program the default value of vlan_id and fc_map */
        phba->valid_vlan = 0;
        phba->fc_map[0] = LPFC_FCOE_FCF_MAP0;
        phba->fc_map[1] = LPFC_FCOE_FCF_MAP1;
        phba->fc_map[2] = LPFC_FCOE_FCF_MAP2;

        mqe = &mboxq->u.mqe;
        if (lpfc_dump_fcoe_param(phba, mboxq))
                return -ENOMEM;

        mp = (struct lpfc_dmabuf *) mboxq->context1;
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);

        lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                        "(%d):2571 Mailbox cmd x%x Status x%x "
                        "Data: x%x x%x x%x x%x x%x x%x x%x x%x x%x "
                        "x%x x%x x%x x%x x%x x%x x%x x%x x%x "
                        "CQ: x%x x%x x%x x%x\n",
                        mboxq->vport ? mboxq->vport->vpi : 0,
                        bf_get(lpfc_mqe_command, mqe),
                        bf_get(lpfc_mqe_status, mqe),
                        mqe->un.mb_words[0], mqe->un.mb_words[1],
                        mqe->un.mb_words[2], mqe->un.mb_words[3],
                        mqe->un.mb_words[4], mqe->un.mb_words[5],
                        mqe->un.mb_words[6], mqe->un.mb_words[7],
                        mqe->un.mb_words[8], mqe->un.mb_words[9],
                        mqe->un.mb_words[10], mqe->un.mb_words[11],
                        mqe->un.mb_words[12], mqe->un.mb_words[13],
                        mqe->un.mb_words[14], mqe->un.mb_words[15],
                        mqe->un.mb_words[16], mqe->un.mb_words[50],
                        mboxq->mcqe.word0,
                        mboxq->mcqe.mcqe_tag0,  mboxq->mcqe.mcqe_tag1,
                        mboxq->mcqe.trailer);

        if (rc) {
                lpfc_mbuf_free(phba, mp->virt, mp->phys);
                kfree(mp);
                return -EIO;
        }
        data_length = mqe->un.mb_words[5];
        if (data_length > DMP_RGN23_SIZE) {
                lpfc_mbuf_free(phba, mp->virt, mp->phys);
                kfree(mp);
                return -EIO;
        }

        lpfc_parse_fcoe_conf(phba, mp->virt, data_length);
        lpfc_mbuf_free(phba, mp->virt, mp->phys);
        kfree(mp);
        return 0;
}

/**
 * lpfc_sli4_read_rev - Issue READ_REV and collect vpd data
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: pointer to the LPFC_MBOXQ_t structure.
 * @vpd: pointer to the memory to hold resulting port vpd data.
 * @vpd_size: On input, the number of bytes allocated to @vpd.
 *            On output, the number of data bytes in @vpd.
 *
 * This routine executes a READ_REV SLI4 mailbox command.  In
 * addition, this routine gets the port vpd data.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - could not allocated memory.
 **/
static int
lpfc_sli4_read_rev(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
                    uint8_t *vpd, uint32_t *vpd_size)
{
        int rc = 0;
        uint32_t dma_size;
        struct lpfc_dmabuf *dmabuf;
        struct lpfc_mqe *mqe;

        dmabuf = kzalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
        if (!dmabuf)
                return -ENOMEM;

        /*
         * Get a DMA buffer for the vpd data resulting from the READ_REV
         * mailbox command.
         */
        dma_size = *vpd_size;
        dmabuf->virt = dma_alloc_coherent(&phba->pcidev->dev,
                                          dma_size,
                                          &dmabuf->phys,
                                          GFP_KERNEL);
        if (!dmabuf->virt) {
                kfree(dmabuf);
                return -ENOMEM;
        }
        memset(dmabuf->virt, 0, dma_size);

        /*
         * The SLI4 implementation of READ_REV conflicts at word1,
         * bits 31:16 and SLI4 adds vpd functionality not present
         * in SLI3.  This code corrects the conflicts.
         */
        lpfc_read_rev(phba, mboxq);
        mqe = &mboxq->u.mqe;
        mqe->un.read_rev.vpd_paddr_high = putPaddrHigh(dmabuf->phys);
        mqe->un.read_rev.vpd_paddr_low = putPaddrLow(dmabuf->phys);
        mqe->un.read_rev.word1 &= 0x0000FFFF;
        bf_set(lpfc_mbx_rd_rev_vpd, &mqe->un.read_rev, 1);
        bf_set(lpfc_mbx_rd_rev_avail_len, &mqe->un.read_rev, dma_size);

        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        if (rc) {
                dma_free_coherent(&phba->pcidev->dev, dma_size,
                                  dmabuf->virt, dmabuf->phys);
                kfree(dmabuf);
                return -EIO;
        }

        /*
         * The available vpd length cannot be bigger than the
         * DMA buffer passed to the port.  Catch the less than
         * case and update the caller's size.
         */
        if (mqe->un.read_rev.avail_vpd_len < *vpd_size)
                *vpd_size = mqe->un.read_rev.avail_vpd_len;

        lpfc_sli_pcimem_bcopy(dmabuf->virt, vpd, *vpd_size);
        dma_free_coherent(&phba->pcidev->dev, dma_size,
                          dmabuf->virt, dmabuf->phys);
        kfree(dmabuf);
        return 0;
}

/**
 * lpfc_sli4_arm_cqeq_intr - Arm sli-4 device completion and event queues
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is called to explicitly arm the SLI4 device's completion and
 * event queues
 **/
static void
lpfc_sli4_arm_cqeq_intr(struct lpfc_hba *phba)
{
        uint8_t fcp_eqidx;

        lpfc_sli4_cq_release(phba->sli4_hba.mbx_cq, LPFC_QUEUE_REARM);
        lpfc_sli4_cq_release(phba->sli4_hba.els_cq, LPFC_QUEUE_REARM);
        for (fcp_eqidx = 0; fcp_eqidx < phba->cfg_fcp_eq_count; fcp_eqidx++)
                lpfc_sli4_cq_release(phba->sli4_hba.fcp_cq[fcp_eqidx],
                                     LPFC_QUEUE_REARM);
        lpfc_sli4_eq_release(phba->sli4_hba.sp_eq, LPFC_QUEUE_REARM);
        for (fcp_eqidx = 0; fcp_eqidx < phba->cfg_fcp_eq_count; fcp_eqidx++)
                lpfc_sli4_eq_release(phba->sli4_hba.fp_eq[fcp_eqidx],
                                     LPFC_QUEUE_REARM);
}

/**
 * lpfc_sli4_hba_setup - SLI4 device intialization PCI function
 * @phba: Pointer to HBA context object.
 *
 * This function is the main SLI4 device intialization PCI function. This
 * function is called by the HBA intialization code, HBA reset code and
 * HBA error attention handler code. Caller is not required to hold any
 * locks.
 **/
int
lpfc_sli4_hba_setup(struct lpfc_hba *phba)
{
        int rc;
        LPFC_MBOXQ_t *mboxq;
        struct lpfc_mqe *mqe;
        uint8_t *vpd;
        uint32_t vpd_size;
        uint32_t ftr_rsp = 0;
        struct Scsi_Host *shost = lpfc_shost_from_vport(phba->pport);
        struct lpfc_vport *vport = phba->pport;
        struct lpfc_dmabuf *mp;

        /* Perform a PCI function reset to start from clean */
        rc = lpfc_pci_function_reset(phba);
        if (unlikely(rc))
                return -ENODEV;

        /* Check the HBA Host Status Register for readyness */
        rc = lpfc_sli4_post_status_check(phba);
        if (unlikely(rc))
                return -ENODEV;
        else {
                spin_lock_irq(&phba->hbalock);
                phba->sli.sli_flag |= LPFC_SLI_ACTIVE;
                spin_unlock_irq(&phba->hbalock);
        }

        /*
         * Allocate a single mailbox container for initializing the
         * port.
         */
        mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq)
                return -ENOMEM;

        /*
         * Continue initialization with default values even if driver failed
         * to read FCoE param config regions
         */
        if (lpfc_sli4_read_fcoe_params(phba, mboxq))
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_INIT,
                        "2570 Failed to read FCoE parameters\n");

        /* Issue READ_REV to collect vpd and FW information. */
        vpd_size = PAGE_SIZE;
        vpd = kzalloc(vpd_size, GFP_KERNEL);
        if (!vpd) {
                rc = -ENOMEM;
                goto out_free_mbox;
        }

        rc = lpfc_sli4_read_rev(phba, mboxq, vpd, &vpd_size);
        if (unlikely(rc))
                goto out_free_vpd;

        mqe = &mboxq->u.mqe;
        phba->sli_rev = bf_get(lpfc_mbx_rd_rev_sli_lvl, &mqe->un.read_rev);
        if (bf_get(lpfc_mbx_rd_rev_fcoe, &mqe->un.read_rev))
                phba->hba_flag |= HBA_FCOE_SUPPORT;

        if (bf_get(lpfc_mbx_rd_rev_cee_ver, &mqe->un.read_rev) ==
                LPFC_DCBX_CEE_MODE)
                phba->hba_flag |= HBA_FIP_SUPPORT;
        else
                phba->hba_flag &= ~HBA_FIP_SUPPORT;

        if (phba->sli_rev != LPFC_SLI_REV4 ||
            !(phba->hba_flag & HBA_FCOE_SUPPORT)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                        "0376 READ_REV Error. SLI Level %d "
                        "FCoE enabled %d\n",
                        phba->sli_rev, phba->hba_flag & HBA_FCOE_SUPPORT);
                rc = -EIO;
                goto out_free_vpd;
        }
        /*
         * Evaluate the read rev and vpd data. Populate the driver
         * state with the results. If this routine fails, the failure
         * is not fatal as the driver will use generic values.
         */
        rc = lpfc_parse_vpd(phba, vpd, vpd_size);
        if (unlikely(!rc)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "0377 Error %d parsing vpd. "
                                "Using defaults.\n", rc);
                rc = 0;
        }

        /* Save information as VPD data */
        phba->vpd.rev.biuRev = mqe->un.read_rev.first_hw_rev;
        phba->vpd.rev.smRev = mqe->un.read_rev.second_hw_rev;
        phba->vpd.rev.endecRev = mqe->un.read_rev.third_hw_rev;
        phba->vpd.rev.fcphHigh = bf_get(lpfc_mbx_rd_rev_fcph_high,
                                         &mqe->un.read_rev);
        phba->vpd.rev.fcphLow = bf_get(lpfc_mbx_rd_rev_fcph_low,
                                       &mqe->un.read_rev);
        phba->vpd.rev.feaLevelHigh = bf_get(lpfc_mbx_rd_rev_ftr_lvl_high,
                                            &mqe->un.read_rev);
        phba->vpd.rev.feaLevelLow = bf_get(lpfc_mbx_rd_rev_ftr_lvl_low,
                                           &mqe->un.read_rev);
        phba->vpd.rev.sli1FwRev = mqe->un.read_rev.fw_id_rev;
        memcpy(phba->vpd.rev.sli1FwName, mqe->un.read_rev.fw_name, 16);
        phba->vpd.rev.sli2FwRev = mqe->un.read_rev.ulp_fw_id_rev;
        memcpy(phba->vpd.rev.sli2FwName, mqe->un.read_rev.ulp_fw_name, 16);
        phba->vpd.rev.opFwRev = mqe->un.read_rev.fw_id_rev;
        memcpy(phba->vpd.rev.opFwName, mqe->un.read_rev.fw_name, 16);
        lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                        "(%d):0380 READ_REV Status x%x "
                        "fw_rev:%s fcphHi:%x fcphLo:%x flHi:%x flLo:%x\n",
                        mboxq->vport ? mboxq->vport->vpi : 0,
                        bf_get(lpfc_mqe_status, mqe),
                        phba->vpd.rev.opFwName,
                        phba->vpd.rev.fcphHigh, phba->vpd.rev.fcphLow,
                        phba->vpd.rev.feaLevelHigh, phba->vpd.rev.feaLevelLow);

        /*
         * Discover the port's supported feature set and match it against the
         * hosts requests.
         */
        lpfc_request_features(phba, mboxq);
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        if (unlikely(rc)) {
                rc = -EIO;
                goto out_free_vpd;
        }

        /*
         * The port must support FCP initiator mode as this is the
         * only mode running in the host.
         */
        if (!(bf_get(lpfc_mbx_rq_ftr_rsp_fcpi, &mqe->un.req_ftrs))) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_SLI,
                                "0378 No support for fcpi mode.\n");
                ftr_rsp++;
        }

        /*
         * If the port cannot support the host's requested features
         * then turn off the global config parameters to disable the
         * feature in the driver.  This is not a fatal error.
         */
        if ((phba->cfg_enable_bg) &&
            !(bf_get(lpfc_mbx_rq_ftr_rsp_dif, &mqe->un.req_ftrs)))
                ftr_rsp++;

        if (phba->max_vpi && phba->cfg_enable_npiv &&
            !(bf_get(lpfc_mbx_rq_ftr_rsp_npiv, &mqe->un.req_ftrs)))
                ftr_rsp++;

        if (ftr_rsp) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_SLI,
                                "0379 Feature Mismatch Data: x%08x %08x "
                                "x%x x%x x%x\n", mqe->un.req_ftrs.word2,
                                mqe->un.req_ftrs.word3, phba->cfg_enable_bg,
                                phba->cfg_enable_npiv, phba->max_vpi);
                if (!(bf_get(lpfc_mbx_rq_ftr_rsp_dif, &mqe->un.req_ftrs)))
                        phba->cfg_enable_bg = 0;
                if (!(bf_get(lpfc_mbx_rq_ftr_rsp_npiv, &mqe->un.req_ftrs)))
                        phba->cfg_enable_npiv = 0;
        }

        /* These SLI3 features are assumed in SLI4 */
        spin_lock_irq(&phba->hbalock);
        phba->sli3_options |= (LPFC_SLI3_NPIV_ENABLED | LPFC_SLI3_HBQ_ENABLED);
        spin_unlock_irq(&phba->hbalock);

        /* Read the port's service parameters. */
        lpfc_read_sparam(phba, mboxq, vport->vpi);
        mboxq->vport = vport;
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        mp = (struct lpfc_dmabuf *) mboxq->context1;
        if (rc == MBX_SUCCESS) {
                memcpy(&vport->fc_sparam, mp->virt, sizeof(struct serv_parm));
                rc = 0;
        }

        /*
         * This memory was allocated by the lpfc_read_sparam routine. Release
         * it to the mbuf pool.
         */
        lpfc_mbuf_free(phba, mp->virt, mp->phys);
        kfree(mp);
        mboxq->context1 = NULL;
        if (unlikely(rc)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "0382 READ_SPARAM command failed "
                                "status %d, mbxStatus x%x\n",
                                rc, bf_get(lpfc_mqe_status, mqe));
                phba->link_state = LPFC_HBA_ERROR;
                rc = -EIO;
                goto out_free_vpd;
        }

        if (phba->cfg_soft_wwnn)
                u64_to_wwn(phba->cfg_soft_wwnn,
                           vport->fc_sparam.nodeName.u.wwn);
        if (phba->cfg_soft_wwpn)
                u64_to_wwn(phba->cfg_soft_wwpn,
                           vport->fc_sparam.portName.u.wwn);
        memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
               sizeof(struct lpfc_name));
        memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
               sizeof(struct lpfc_name));

        /* Update the fc_host data structures with new wwn. */
        fc_host_node_name(shost) = wwn_to_u64(vport->fc_nodename.u.wwn);
        fc_host_port_name(shost) = wwn_to_u64(vport->fc_portname.u.wwn);

        /* Register SGL pool to the device using non-embedded mailbox command */
        rc = lpfc_sli4_post_sgl_list(phba);
        if (unlikely(rc)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "0582 Error %d during sgl post operation\n",
                                        rc);
                rc = -ENODEV;
                goto out_free_vpd;
        }

        /* Register SCSI SGL pool to the device */
        rc = lpfc_sli4_repost_scsi_sgl_list(phba);
        if (unlikely(rc)) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_SLI,
                                "0383 Error %d during scsi sgl post "
                                "operation\n", rc);
                /* Some Scsi buffers were moved to the abort scsi list */
                /* A pci function reset will repost them */
                rc = -ENODEV;
                goto out_free_vpd;
        }

        /* Post the rpi header region to the device. */
        rc = lpfc_sli4_post_all_rpi_hdrs(phba);
        if (unlikely(rc)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "0393 Error %d during rpi post operation\n",
                                rc);
                rc = -ENODEV;
                goto out_free_vpd;
        }

        /* Set up all the queues to the device */
        rc = lpfc_sli4_queue_setup(phba);
        if (unlikely(rc)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "0381 Error %d during queue setup.\n ", rc);
                goto out_stop_timers;
        }

        /* Arm the CQs and then EQs on device */
        lpfc_sli4_arm_cqeq_intr(phba);

        /* Indicate device interrupt mode */
        phba->sli4_hba.intr_enable = 1;

        /* Allow asynchronous mailbox command to go through */
        spin_lock_irq(&phba->hbalock);
        phba->sli.sli_flag &= ~LPFC_SLI_ASYNC_MBX_BLK;
        spin_unlock_irq(&phba->hbalock);

        /* Post receive buffers to the device */
        lpfc_sli4_rb_setup(phba);

        /* Start the ELS watchdog timer */
        mod_timer(&vport->els_tmofunc,
                  jiffies + HZ * (phba->fc_ratov * 2));

        /* Start heart beat timer */
        mod_timer(&phba->hb_tmofunc,
                  jiffies + HZ * LPFC_HB_MBOX_INTERVAL);
        phba->hb_outstanding = 0;
        phba->last_completion_time = jiffies;

        /* Start error attention (ERATT) polling timer */
        mod_timer(&phba->eratt_poll, jiffies + HZ * LPFC_ERATT_POLL_INTERVAL);

        /*
         * The port is ready, set the host's link state to LINK_DOWN
         * in preparation for link interrupts.
         */
        lpfc_init_link(phba, mboxq, phba->cfg_topology, phba->cfg_link_speed);
        mboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        lpfc_set_loopback_flag(phba);
        /* Change driver state to LPFC_LINK_DOWN right before init link */
        spin_lock_irq(&phba->hbalock);
        phba->link_state = LPFC_LINK_DOWN;
        spin_unlock_irq(&phba->hbalock);
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
        if (unlikely(rc != MBX_NOT_FINISHED)) {
                kfree(vpd);
                return 0;
        } else
                rc = -EIO;

        /* Unset all the queues set up in this routine when error out */
        if (rc)
                lpfc_sli4_queue_unset(phba);

out_stop_timers:
        if (rc)
                lpfc_stop_hba_timers(phba);
out_free_vpd:
        kfree(vpd);
out_free_mbox:
        mempool_free(mboxq, phba->mbox_mem_pool);
        return rc;
}

/**
 * lpfc_mbox_timeout - Timeout call back function for mbox timer
 * @ptr: context object - pointer to hba structure.
 *
 * This is the callback function for mailbox timer. The mailbox
 * timer is armed when a new mailbox command is issued and the timer
 * is deleted when the mailbox complete. The function is called by
 * the kernel timer code when a mailbox does not complete within
 * expected time. This function wakes up the worker thread to
 * process the mailbox timeout and returns. All the processing is
 * done by the worker thread function lpfc_mbox_timeout_handler.
 **/
void
lpfc_mbox_timeout(unsigned long ptr)
{
        struct lpfc_hba  *phba = (struct lpfc_hba *) ptr;
        unsigned long iflag;
        uint32_t tmo_posted;

        spin_lock_irqsave(&phba->pport->work_port_lock, iflag);
        tmo_posted = phba->pport->work_port_events & WORKER_MBOX_TMO;
        if (!tmo_posted)
                phba->pport->work_port_events |= WORKER_MBOX_TMO;
        spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag);

        if (!tmo_posted)
                lpfc_worker_wake_up(phba);
        return;
}


/**
 * lpfc_mbox_timeout_handler - Worker thread function to handle mailbox timeout
 * @phba: Pointer to HBA context object.
 *
 * This function is called from worker thread when a mailbox command times out.
 * The caller is not required to hold any locks. This function will reset the
 * HBA and recover all the pending commands.
 **/
void
lpfc_mbox_timeout_handler(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *pmbox = phba->sli.mbox_active;
        MAILBOX_t *mb = &pmbox->u.mb;
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_sli_ring *pring;

        /* Check the pmbox pointer first.  There is a race condition
         * between the mbox timeout handler getting executed in the
         * worklist and the mailbox actually completing. When this
         * race condition occurs, the mbox_active will be NULL.
         */
        spin_lock_irq(&phba->hbalock);
        if (pmbox == NULL) {
                lpfc_printf_log(phba, KERN_WARNING,
                                LOG_MBOX | LOG_SLI,
                                "0353 Active Mailbox cleared - mailbox timeout "
                                "exiting\n");
                spin_unlock_irq(&phba->hbalock);
                return;
        }

        /* Mbox cmd <mbxCommand> timeout */
        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                        "0310 Mailbox command x%x timeout Data: x%x x%x x%p\n",
                        mb->mbxCommand,
                        phba->pport->port_state,
                        phba->sli.sli_flag,
                        phba->sli.mbox_active);
        spin_unlock_irq(&phba->hbalock);

        /* Setting state unknown so lpfc_sli_abort_iocb_ring
         * would get IOCB_ERROR from lpfc_sli_issue_iocb, allowing
         * it to fail all oustanding SCSI IO.
         */
        spin_lock_irq(&phba->pport->work_port_lock);
        phba->pport->work_port_events &= ~WORKER_MBOX_TMO;
        spin_unlock_irq(&phba->pport->work_port_lock);
        spin_lock_irq(&phba->hbalock);
        phba->link_state = LPFC_LINK_UNKNOWN;
        psli->sli_flag &= ~LPFC_SLI_ACTIVE;
        spin_unlock_irq(&phba->hbalock);

        pring = &psli->ring[psli->fcp_ring];
        lpfc_sli_abort_iocb_ring(phba, pring);

        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                        "0345 Resetting board due to mailbox timeout\n");

        /* Reset the HBA device */
        lpfc_reset_hba(phba);
}

/**
 * lpfc_sli_issue_mbox_s3 - Issue an SLI3 mailbox command to firmware
 * @phba: Pointer to HBA context object.
 * @pmbox: Pointer to mailbox object.
 * @flag: Flag indicating how the mailbox need to be processed.
 *
 * This function is called by discovery code and HBA management code
 * to submit a mailbox command to firmware with SLI-3 interface spec. This
 * function gets the hbalock to protect the data structures.
 * The mailbox command can be submitted in polling mode, in which case
 * this function will wait in a polling loop for the completion of the
 * mailbox.
 * If the mailbox is submitted in no_wait mode (not polling) the
 * function will submit the command and returns immediately without waiting
 * for the mailbox completion. The no_wait is supported only when HBA
 * is in SLI2/SLI3 mode - interrupts are enabled.
 * The SLI interface allows only one mailbox pending at a time. If the
 * mailbox is issued in polling mode and there is already a mailbox
 * pending, then the function will return an error. If the mailbox is issued
 * in NO_WAIT mode and there is a mailbox pending already, the function
 * will return MBX_BUSY after queuing the mailbox into mailbox queue.
 * The sli layer owns the mailbox object until the completion of mailbox
 * command if this function return MBX_BUSY or MBX_SUCCESS. For all other
 * return codes the caller owns the mailbox command after the return of
 * the function.
 **/
static int
lpfc_sli_issue_mbox_s3(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmbox,
                       uint32_t flag)
{
        MAILBOX_t *mb;
        struct lpfc_sli *psli = &phba->sli;
        uint32_t status, evtctr;
        uint32_t ha_copy;
        int i;
        unsigned long timeout;
        unsigned long drvr_flag = 0;
        uint32_t word0, ldata;
        void __iomem *to_slim;
        int processing_queue = 0;

        spin_lock_irqsave(&phba->hbalock, drvr_flag);
        if (!pmbox) {
                phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                /* processing mbox queue from intr_handler */
                if (unlikely(psli->sli_flag & LPFC_SLI_ASYNC_MBX_BLK)) {
                        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                        return MBX_SUCCESS;
                }
                processing_queue = 1;
                pmbox = lpfc_mbox_get(phba);
                if (!pmbox) {
                        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                        return MBX_SUCCESS;
                }
        }

        if (pmbox->mbox_cmpl && pmbox->mbox_cmpl != lpfc_sli_def_mbox_cmpl &&
                pmbox->mbox_cmpl != lpfc_sli_wake_mbox_wait) {
                if(!pmbox->vport) {
                        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                        lpfc_printf_log(phba, KERN_ERR,
                                        LOG_MBOX | LOG_VPORT,
                                        "1806 Mbox x%x failed. No vport\n",
                                        pmbox->u.mb.mbxCommand);
                        dump_stack();
                        goto out_not_finished;
                }
        }

        /* If the PCI channel is in offline state, do not post mbox. */
        if (unlikely(pci_channel_offline(phba->pcidev))) {
                spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                goto out_not_finished;
        }

        /* If HBA has a deferred error attention, fail the iocb. */
        if (unlikely(phba->hba_flag & DEFER_ERATT)) {
                spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                goto out_not_finished;
        }

        psli = &phba->sli;

        mb = &pmbox->u.mb;
        status = MBX_SUCCESS;

        if (phba->link_state == LPFC_HBA_ERROR) {
                spin_unlock_irqrestore(&phba->hbalock, drvr_flag);

                /* Mbox command <mbxCommand> cannot issue */
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "(%d):0311 Mailbox command x%x cannot "
                                "issue Data: x%x x%x\n",
                                pmbox->vport ? pmbox->vport->vpi : 0,
                                pmbox->u.mb.mbxCommand, psli->sli_flag, flag);
                goto out_not_finished;
        }

        if (mb->mbxCommand != MBX_KILL_BOARD && flag & MBX_NOWAIT &&
            !(readl(phba->HCregaddr) & HC_MBINT_ENA)) {
                spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "(%d):2528 Mailbox command x%x cannot "
                                "issue Data: x%x x%x\n",
                                pmbox->vport ? pmbox->vport->vpi : 0,
                                pmbox->u.mb.mbxCommand, psli->sli_flag, flag);
                goto out_not_finished;
        }

        if (psli->sli_flag & LPFC_SLI_MBOX_ACTIVE) {
                /* Polling for a mbox command when another one is already active
                 * is not allowed in SLI. Also, the driver must have established
                 * SLI2 mode to queue and process multiple mbox commands.
                 */

                if (flag & MBX_POLL) {
                        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);

                        /* Mbox command <mbxCommand> cannot issue */
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                        "(%d):2529 Mailbox command x%x "
                                        "cannot issue Data: x%x x%x\n",
                                        pmbox->vport ? pmbox->vport->vpi : 0,
                                        pmbox->u.mb.mbxCommand,
                                        psli->sli_flag, flag);
                        goto out_not_finished;
                }

                if (!(psli->sli_flag & LPFC_SLI_ACTIVE)) {
                        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                        /* Mbox command <mbxCommand> cannot issue */
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                        "(%d):2530 Mailbox command x%x "
                                        "cannot issue Data: x%x x%x\n",
                                        pmbox->vport ? pmbox->vport->vpi : 0,
                                        pmbox->u.mb.mbxCommand,
                                        psli->sli_flag, flag);
                        goto out_not_finished;
                }

                /* Another mailbox command is still being processed, queue this
                 * command to be processed later.
                 */
                lpfc_mbox_put(phba, pmbox);

                /* Mbox cmd issue - BUSY */
                lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                                "(%d):0308 Mbox cmd issue - BUSY Data: "
                                "x%x x%x x%x x%x\n",
                                pmbox->vport ? pmbox->vport->vpi : 0xffffff,
                                mb->mbxCommand, phba->pport->port_state,
                                psli->sli_flag, flag);

                psli->slistat.mbox_busy++;
                spin_unlock_irqrestore(&phba->hbalock, drvr_flag);

                if (pmbox->vport) {
                        lpfc_debugfs_disc_trc(pmbox->vport,
                                LPFC_DISC_TRC_MBOX_VPORT,
                                "MBOX Bsy vport:  cmd:x%x mb:x%x x%x",
                                (uint32_t)mb->mbxCommand,
                                mb->un.varWords[0], mb->un.varWords[1]);
                }
                else {
                        lpfc_debugfs_disc_trc(phba->pport,
                                LPFC_DISC_TRC_MBOX,
                                "MBOX Bsy:        cmd:x%x mb:x%x x%x",
                                (uint32_t)mb->mbxCommand,
                                mb->un.varWords[0], mb->un.varWords[1]);
                }

                return MBX_BUSY;
        }

        psli->sli_flag |= LPFC_SLI_MBOX_ACTIVE;

        /* If we are not polling, we MUST be in SLI2 mode */
        if (flag != MBX_POLL) {
                if (!(psli->sli_flag & LPFC_SLI_ACTIVE) &&
                    (mb->mbxCommand != MBX_KILL_BOARD)) {
                        psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                        /* Mbox command <mbxCommand> cannot issue */
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                        "(%d):2531 Mailbox command x%x "
                                        "cannot issue Data: x%x x%x\n",
                                        pmbox->vport ? pmbox->vport->vpi : 0,
                                        pmbox->u.mb.mbxCommand,
                                        psli->sli_flag, flag);
                        goto out_not_finished;
                }
                /* timeout active mbox command */
                mod_timer(&psli->mbox_tmo, (jiffies +
                               (HZ * lpfc_mbox_tmo_val(phba, mb->mbxCommand))));
        }

        /* Mailbox cmd <cmd> issue */
        lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                        "(%d):0309 Mailbox cmd x%x issue Data: x%x x%x "
                        "x%x\n",
                        pmbox->vport ? pmbox->vport->vpi : 0,
                        mb->mbxCommand, phba->pport->port_state,
                        psli->sli_flag, flag);

        if (mb->mbxCommand != MBX_HEARTBEAT) {
                if (pmbox->vport) {
                        lpfc_debugfs_disc_trc(pmbox->vport,
                                LPFC_DISC_TRC_MBOX_VPORT,
                                "MBOX Send vport: cmd:x%x mb:x%x x%x",
                                (uint32_t)mb->mbxCommand,
                                mb->un.varWords[0], mb->un.varWords[1]);
                }
                else {
                        lpfc_debugfs_disc_trc(phba->pport,
                                LPFC_DISC_TRC_MBOX,
                                "MBOX Send:       cmd:x%x mb:x%x x%x",
                                (uint32_t)mb->mbxCommand,
                                mb->un.varWords[0], mb->un.varWords[1]);
                }
        }

        psli->slistat.mbox_cmd++;
        evtctr = psli->slistat.mbox_event;

        /* next set own bit for the adapter and copy over command word */
        mb->mbxOwner = OWN_CHIP;

        if (psli->sli_flag & LPFC_SLI_ACTIVE) {
                /* First copy command data to host SLIM area */
                lpfc_sli_pcimem_bcopy(mb, phba->mbox, MAILBOX_CMD_SIZE);
        } else {
                if (mb->mbxCommand == MBX_CONFIG_PORT) {
                        /* copy command data into host mbox for cmpl */
                        lpfc_sli_pcimem_bcopy(mb, phba->mbox, MAILBOX_CMD_SIZE);
                }

                /* First copy mbox command data to HBA SLIM, skip past first
                   word */
                to_slim = phba->MBslimaddr + sizeof (uint32_t);
                lpfc_memcpy_to_slim(to_slim, &mb->un.varWords[0],
                            MAILBOX_CMD_SIZE - sizeof (uint32_t));

                /* Next copy over first word, with mbxOwner set */
                ldata = *((uint32_t *)mb);
                to_slim = phba->MBslimaddr;
                writel(ldata, to_slim);
                readl(to_slim); /* flush */

                if (mb->mbxCommand == MBX_CONFIG_PORT) {
                        /* switch over to host mailbox */
                        psli->sli_flag |= LPFC_SLI_ACTIVE;
                }
        }

        wmb();

        switch (flag) {
        case MBX_NOWAIT:
                /* Set up reference to mailbox command */
                psli->mbox_active = pmbox;
                /* Interrupt board to do it */
                writel(CA_MBATT, phba->CAregaddr);
                readl(phba->CAregaddr); /* flush */
                /* Don't wait for it to finish, just return */
                break;

        case MBX_POLL:
                /* Set up null reference to mailbox command */
                psli->mbox_active = NULL;
                /* Interrupt board to do it */
                writel(CA_MBATT, phba->CAregaddr);
                readl(phba->CAregaddr); /* flush */

                if (psli->sli_flag & LPFC_SLI_ACTIVE) {
                        /* First read mbox status word */
                        word0 = *((uint32_t *)phba->mbox);
                        word0 = le32_to_cpu(word0);
                } else {
                        /* First read mbox status word */
                        word0 = readl(phba->MBslimaddr);
                }

                /* Read the HBA Host Attention Register */
                ha_copy = readl(phba->HAregaddr);
                timeout = msecs_to_jiffies(lpfc_mbox_tmo_val(phba,
                                                             mb->mbxCommand) *
                                           1000) + jiffies;
                i = 0;
                /* Wait for command to complete */
                while (((word0 & OWN_CHIP) == OWN_CHIP) ||
                       (!(ha_copy & HA_MBATT) &&
                        (phba->link_state > LPFC_WARM_START))) {
                        if (time_after(jiffies, timeout)) {
                                psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                                spin_unlock_irqrestore(&phba->hbalock,
                                                       drvr_flag);
                                goto out_not_finished;
                        }

                        /* Check if we took a mbox interrupt while we were
                           polling */
                        if (((word0 & OWN_CHIP) != OWN_CHIP)
                            && (evtctr != psli->slistat.mbox_event))
                                break;

                        if (i++ > 10) {
                                spin_unlock_irqrestore(&phba->hbalock,
                                                       drvr_flag);
                                msleep(1);
                                spin_lock_irqsave(&phba->hbalock, drvr_flag);
                        }

                        if (psli->sli_flag & LPFC_SLI_ACTIVE) {
                                /* First copy command data */
                                word0 = *((uint32_t *)phba->mbox);
                                word0 = le32_to_cpu(word0);
                                if (mb->mbxCommand == MBX_CONFIG_PORT) {
                                        MAILBOX_t *slimmb;
                                        uint32_t slimword0;
                                        /* Check real SLIM for any errors */
                                        slimword0 = readl(phba->MBslimaddr);
                                        slimmb = (MAILBOX_t *) & slimword0;
                                        if (((slimword0 & OWN_CHIP) != OWN_CHIP)
                                            && slimmb->mbxStatus) {
                                                psli->sli_flag &=
                                                    ~LPFC_SLI_ACTIVE;
                                                word0 = slimword0;
                                        }
                                }
                        } else {
                                /* First copy command data */
                                word0 = readl(phba->MBslimaddr);
                        }
                        /* Read the HBA Host Attention Register */
                        ha_copy = readl(phba->HAregaddr);
                }

                if (psli->sli_flag & LPFC_SLI_ACTIVE) {
                        /* copy results back to user */
                        lpfc_sli_pcimem_bcopy(phba->mbox, mb, MAILBOX_CMD_SIZE);
                } else {
                        /* First copy command data */
                        lpfc_memcpy_from_slim(mb, phba->MBslimaddr,
                                                        MAILBOX_CMD_SIZE);
                        if ((mb->mbxCommand == MBX_DUMP_MEMORY) &&
                                pmbox->context2) {
                                lpfc_memcpy_from_slim((void *)pmbox->context2,
                                      phba->MBslimaddr + DMP_RSP_OFFSET,
                                                      mb->un.varDmp.word_cnt);
                        }
                }

                writel(HA_MBATT, phba->HAregaddr);
                readl(phba->HAregaddr); /* flush */

                psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                status = mb->mbxStatus;
        }

        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
        return status;

out_not_finished:
        if (processing_queue) {
                pmbox->u.mb.mbxStatus = MBX_NOT_FINISHED;
                lpfc_mbox_cmpl_put(phba, pmbox);
        }
        return MBX_NOT_FINISHED;
}

/**
 * lpfc_sli4_async_mbox_block - Block posting SLI4 asynchronous mailbox command
 * @phba: Pointer to HBA context object.
 *
 * The function blocks the posting of SLI4 asynchronous mailbox commands from
 * the driver internal pending mailbox queue. It will then try to wait out the
 * possible outstanding mailbox command before return.
 *
 * Returns:
 *      0 - the outstanding mailbox command completed; otherwise, the wait for
 *      the outstanding mailbox command timed out.
 **/
static int
lpfc_sli4_async_mbox_block(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;
        uint8_t actcmd = MBX_HEARTBEAT;
        int rc = 0;
        unsigned long timeout;

        /* Mark the asynchronous mailbox command posting as blocked */
        spin_lock_irq(&phba->hbalock);
        psli->sli_flag |= LPFC_SLI_ASYNC_MBX_BLK;
        if (phba->sli.mbox_active)
                actcmd = phba->sli.mbox_active->u.mb.mbxCommand;
        spin_unlock_irq(&phba->hbalock);
        /* Determine how long we might wait for the active mailbox
         * command to be gracefully completed by firmware.
         */
        timeout = msecs_to_jiffies(lpfc_mbox_tmo_val(phba, actcmd) * 1000) +
                                   jiffies;
        /* Wait for the outstnading mailbox command to complete */
        while (phba->sli.mbox_active) {
                /* Check active mailbox complete status every 2ms */
                msleep(2);
                if (time_after(jiffies, timeout)) {
                        /* Timeout, marked the outstanding cmd not complete */
                        rc = 1;
                        break;
                }
        }

        /* Can not cleanly block async mailbox command, fails it */
        if (rc) {
                spin_lock_irq(&phba->hbalock);
                psli->sli_flag &= ~LPFC_SLI_ASYNC_MBX_BLK;
                spin_unlock_irq(&phba->hbalock);
        }
        return rc;
}

/**
 * lpfc_sli4_async_mbox_unblock - Block posting SLI4 async mailbox command
 * @phba: Pointer to HBA context object.
 *
 * The function unblocks and resume posting of SLI4 asynchronous mailbox
 * commands from the driver internal pending mailbox queue. It makes sure
 * that there is no outstanding mailbox command before resuming posting
 * asynchronous mailbox commands. If, for any reason, there is outstanding
 * mailbox command, it will try to wait it out before resuming asynchronous
 * mailbox command posting.
 **/
static void
lpfc_sli4_async_mbox_unblock(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;

        spin_lock_irq(&phba->hbalock);
        if (!(psli->sli_flag & LPFC_SLI_ASYNC_MBX_BLK)) {
                /* Asynchronous mailbox posting is not blocked, do nothing */
                spin_unlock_irq(&phba->hbalock);
                return;
        }

        /* Outstanding synchronous mailbox command is guaranteed to be done,
         * successful or timeout, after timing-out the outstanding mailbox
         * command shall always be removed, so just unblock posting async
         * mailbox command and resume
         */
        psli->sli_flag &= ~LPFC_SLI_ASYNC_MBX_BLK;
        spin_unlock_irq(&phba->hbalock);

        /* wake up worker thread to post asynchronlous mailbox command */
        lpfc_worker_wake_up(phba);
}

/**
 * lpfc_sli4_post_sync_mbox - Post an SLI4 mailbox to the bootstrap mailbox
 * @phba: Pointer to HBA context object.
 * @mboxq: Pointer to mailbox object.
 *
 * The function posts a mailbox to the port.  The mailbox is expected
 * to be comletely filled in and ready for the port to operate on it.
 * This routine executes a synchronous completion operation on the
 * mailbox by polling for its completion.
 *
 * The caller must not be holding any locks when calling this routine.
 *
 * Returns:
 *      MBX_SUCCESS - mailbox posted successfully
 *      Any of the MBX error values.
 **/
static int
lpfc_sli4_post_sync_mbox(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        int rc = MBX_SUCCESS;
        unsigned long iflag;
        uint32_t db_ready;
        uint32_t mcqe_status;
        uint32_t mbx_cmnd;
        unsigned long timeout;
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_mqe *mb = &mboxq->u.mqe;
        struct lpfc_bmbx_create *mbox_rgn;
        struct dma_address *dma_address;
        struct lpfc_register bmbx_reg;

        /*
         * Only one mailbox can be active to the bootstrap mailbox region
         * at a time and there is no queueing provided.
         */
        spin_lock_irqsave(&phba->hbalock, iflag);
        if (psli->sli_flag & LPFC_SLI_MBOX_ACTIVE) {
                spin_unlock_irqrestore(&phba->hbalock, iflag);
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "(%d):2532 Mailbox command x%x (x%x) "
                                "cannot issue Data: x%x x%x\n",
                                mboxq->vport ? mboxq->vport->vpi : 0,
                                mboxq->u.mb.mbxCommand,
                                lpfc_sli4_mbox_opcode_get(phba, mboxq),
                                psli->sli_flag, MBX_POLL);
                return MBXERR_ERROR;
        }
        /* The server grabs the token and owns it until release */
        psli->sli_flag |= LPFC_SLI_MBOX_ACTIVE;
        phba->sli.mbox_active = mboxq;
        spin_unlock_irqrestore(&phba->hbalock, iflag);

        /*
         * Initialize the bootstrap memory region to avoid stale data areas
         * in the mailbox post.  Then copy the caller's mailbox contents to
         * the bmbx mailbox region.
         */
        mbx_cmnd = bf_get(lpfc_mqe_command, mb);
        memset(phba->sli4_hba.bmbx.avirt, 0, sizeof(struct lpfc_bmbx_create));
        lpfc_sli_pcimem_bcopy(mb, phba->sli4_hba.bmbx.avirt,
                              sizeof(struct lpfc_mqe));

        /* Post the high mailbox dma address to the port and wait for ready. */
        dma_address = &phba->sli4_hba.bmbx.dma_address;
        writel(dma_address->addr_hi, phba->sli4_hba.BMBXregaddr);

        timeout = msecs_to_jiffies(lpfc_mbox_tmo_val(phba, mbx_cmnd)
                                   * 1000) + jiffies;
        do {
                bmbx_reg.word0 = readl(phba->sli4_hba.BMBXregaddr);
                db_ready = bf_get(lpfc_bmbx_rdy, &bmbx_reg);
                if (!db_ready)
                        msleep(2);

                if (time_after(jiffies, timeout)) {
                        rc = MBXERR_ERROR;
                        goto exit;
                }
        } while (!db_ready);

        /* Post the low mailbox dma address to the port. */
        writel(dma_address->addr_lo, phba->sli4_hba.BMBXregaddr);
        timeout = msecs_to_jiffies(lpfc_mbox_tmo_val(phba, mbx_cmnd)
                                   * 1000) + jiffies;
        do {
                bmbx_reg.word0 = readl(phba->sli4_hba.BMBXregaddr);
                db_ready = bf_get(lpfc_bmbx_rdy, &bmbx_reg);
                if (!db_ready)
                        msleep(2);

                if (time_after(jiffies, timeout)) {
                        rc = MBXERR_ERROR;
                        goto exit;
                }
        } while (!db_ready);

        /*
         * Read the CQ to ensure the mailbox has completed.
         * If so, update the mailbox status so that the upper layers
         * can complete the request normally.
         */
        lpfc_sli_pcimem_bcopy(phba->sli4_hba.bmbx.avirt, mb,
                              sizeof(struct lpfc_mqe));
        mbox_rgn = (struct lpfc_bmbx_create *) phba->sli4_hba.bmbx.avirt;
        lpfc_sli_pcimem_bcopy(&mbox_rgn->mcqe, &mboxq->mcqe,
                              sizeof(struct lpfc_mcqe));
        mcqe_status = bf_get(lpfc_mcqe_status, &mbox_rgn->mcqe);

        /* Prefix the mailbox status with range x4000 to note SLI4 status. */
        if (mcqe_status != MB_CQE_STATUS_SUCCESS) {
                bf_set(lpfc_mqe_status, mb, LPFC_MBX_ERROR_RANGE | mcqe_status);
                rc = MBXERR_ERROR;
        }

        lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                        "(%d):0356 Mailbox cmd x%x (x%x) Status x%x "
                        "Data: x%x x%x x%x x%x x%x x%x x%x x%x x%x x%x x%x"
                        " x%x x%x CQ: x%x x%x x%x x%x\n",
                        mboxq->vport ? mboxq->vport->vpi : 0,
                        mbx_cmnd, lpfc_sli4_mbox_opcode_get(phba, mboxq),
                        bf_get(lpfc_mqe_status, mb),
                        mb->un.mb_words[0], mb->un.mb_words[1],
                        mb->un.mb_words[2], mb->un.mb_words[3],
                        mb->un.mb_words[4], mb->un.mb_words[5],
                        mb->un.mb_words[6], mb->un.mb_words[7],
                        mb->un.mb_words[8], mb->un.mb_words[9],
                        mb->un.mb_words[10], mb->un.mb_words[11],
                        mb->un.mb_words[12], mboxq->mcqe.word0,
                        mboxq->mcqe.mcqe_tag0,  mboxq->mcqe.mcqe_tag1,
                        mboxq->mcqe.trailer);
exit:
        /* We are holding the token, no needed for lock when release */
        spin_lock_irqsave(&phba->hbalock, iflag);
        psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
        phba->sli.mbox_active = NULL;
        spin_unlock_irqrestore(&phba->hbalock, iflag);
        return rc;
}

/**
 * lpfc_sli_issue_mbox_s4 - Issue an SLI4 mailbox command to firmware
 * @phba: Pointer to HBA context object.
 * @pmbox: Pointer to mailbox object.
 * @flag: Flag indicating how the mailbox need to be processed.
 *
 * This function is called by discovery code and HBA management code to submit
 * a mailbox command to firmware with SLI-4 interface spec.
 *
 * Return codes the caller owns the mailbox command after the return of the
 * function.
 **/
static int
lpfc_sli_issue_mbox_s4(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
                       uint32_t flag)
{
        struct lpfc_sli *psli = &phba->sli;
        unsigned long iflags;
        int rc;

        rc = lpfc_mbox_dev_check(phba);
        if (unlikely(rc)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "(%d):2544 Mailbox command x%x (x%x) "
                                "cannot issue Data: x%x x%x\n",
                                mboxq->vport ? mboxq->vport->vpi : 0,
                                mboxq->u.mb.mbxCommand,
                                lpfc_sli4_mbox_opcode_get(phba, mboxq),
                                psli->sli_flag, flag);
                goto out_not_finished;
        }

        /* Detect polling mode and jump to a handler */
        if (!phba->sli4_hba.intr_enable) {
                if (flag == MBX_POLL)
                        rc = lpfc_sli4_post_sync_mbox(phba, mboxq);
                else
                        rc = -EIO;
                if (rc != MBX_SUCCESS)
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                        "(%d):2541 Mailbox command x%x "
                                        "(x%x) cannot issue Data: x%x x%x\n",
                                        mboxq->vport ? mboxq->vport->vpi : 0,
                                        mboxq->u.mb.mbxCommand,
                                        lpfc_sli4_mbox_opcode_get(phba, mboxq),
                                        psli->sli_flag, flag);
                return rc;
        } else if (flag == MBX_POLL) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_SLI,
                                "(%d):2542 Try to issue mailbox command "
                                "x%x (x%x) synchronously ahead of async"
                                "mailbox command queue: x%x x%x\n",
                                mboxq->vport ? mboxq->vport->vpi : 0,
                                mboxq->u.mb.mbxCommand,
                                lpfc_sli4_mbox_opcode_get(phba, mboxq),
                                psli->sli_flag, flag);
                /* Try to block the asynchronous mailbox posting */
                rc = lpfc_sli4_async_mbox_block(phba);
                if (!rc) {
                        /* Successfully blocked, now issue sync mbox cmd */
                        rc = lpfc_sli4_post_sync_mbox(phba, mboxq);
                        if (rc != MBX_SUCCESS)
                                lpfc_printf_log(phba, KERN_ERR,
                                                LOG_MBOX | LOG_SLI,
                                                "(%d):2597 Mailbox command "
                                                "x%x (x%x) cannot issue "
                                                "Data: x%x x%x\n",
                                                mboxq->vport ?
                                                mboxq->vport->vpi : 0,
                                                mboxq->u.mb.mbxCommand,
                                                lpfc_sli4_mbox_opcode_get(phba,
                                                                mboxq),
                                                psli->sli_flag, flag);
                        /* Unblock the async mailbox posting afterward */
                        lpfc_sli4_async_mbox_unblock(phba);
                }
                return rc;
        }

        /* Now, interrupt mode asynchrous mailbox command */
        rc = lpfc_mbox_cmd_check(phba, mboxq);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "(%d):2543 Mailbox command x%x (x%x) "
                                "cannot issue Data: x%x x%x\n",
                                mboxq->vport ? mboxq->vport->vpi : 0,
                                mboxq->u.mb.mbxCommand,
                                lpfc_sli4_mbox_opcode_get(phba, mboxq),
                                psli->sli_flag, flag);
                goto out_not_finished;
        }

        /* Put the mailbox command to the driver internal FIFO */
        psli->slistat.mbox_busy++;
        spin_lock_irqsave(&phba->hbalock, iflags);
        lpfc_mbox_put(phba, mboxq);
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                        "(%d):0354 Mbox cmd issue - Enqueue Data: "
                        "x%x (x%x) x%x x%x x%x\n",
                        mboxq->vport ? mboxq->vport->vpi : 0xffffff,
                        bf_get(lpfc_mqe_command, &mboxq->u.mqe),
                        lpfc_sli4_mbox_opcode_get(phba, mboxq),
                        phba->pport->port_state,
                        psli->sli_flag, MBX_NOWAIT);
        /* Wake up worker thread to transport mailbox command from head */
        lpfc_worker_wake_up(phba);

        return MBX_BUSY;

out_not_finished:
        return MBX_NOT_FINISHED;
}

/**
 * lpfc_sli4_post_async_mbox - Post an SLI4 mailbox command to device
 * @phba: Pointer to HBA context object.
 *
 * This function is called by worker thread to send a mailbox command to
 * SLI4 HBA firmware.
 *
 **/
int
lpfc_sli4_post_async_mbox(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;
        LPFC_MBOXQ_t *mboxq;
        int rc = MBX_SUCCESS;
        unsigned long iflags;
        struct lpfc_mqe *mqe;
        uint32_t mbx_cmnd;

        /* Check interrupt mode before post async mailbox command */
        if (unlikely(!phba->sli4_hba.intr_enable))
                return MBX_NOT_FINISHED;

        /* Check for mailbox command service token */
        spin_lock_irqsave(&phba->hbalock, iflags);
        if (unlikely(psli->sli_flag & LPFC_SLI_ASYNC_MBX_BLK)) {
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                return MBX_NOT_FINISHED;
        }
        if (psli->sli_flag & LPFC_SLI_MBOX_ACTIVE) {
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                return MBX_NOT_FINISHED;
        }
        if (unlikely(phba->sli.mbox_active)) {
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "0384 There is pending active mailbox cmd\n");
                return MBX_NOT_FINISHED;
        }
        /* Take the mailbox command service token */
        psli->sli_flag |= LPFC_SLI_MBOX_ACTIVE;

        /* Get the next mailbox command from head of queue */
        mboxq = lpfc_mbox_get(phba);

        /* If no more mailbox command waiting for post, we're done */
        if (!mboxq) {
                psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                return MBX_SUCCESS;
        }
        phba->sli.mbox_active = mboxq;
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        /* Check device readiness for posting mailbox command */
        rc = lpfc_mbox_dev_check(phba);
        if (unlikely(rc))
                /* Driver clean routine will clean up pending mailbox */
                goto out_not_finished;

        /* Prepare the mbox command to be posted */
        mqe = &mboxq->u.mqe;
        mbx_cmnd = bf_get(lpfc_mqe_command, mqe);

        /* Start timer for the mbox_tmo and log some mailbox post messages */
        mod_timer(&psli->mbox_tmo, (jiffies +
                  (HZ * lpfc_mbox_tmo_val(phba, mbx_cmnd))));

        lpfc_printf_log(phba, KERN_INFO, LOG_MBOX | LOG_SLI,
                        "(%d):0355 Mailbox cmd x%x (x%x) issue Data: "
                        "x%x x%x\n",
                        mboxq->vport ? mboxq->vport->vpi : 0, mbx_cmnd,
                        lpfc_sli4_mbox_opcode_get(phba, mboxq),
                        phba->pport->port_state, psli->sli_flag);

        if (mbx_cmnd != MBX_HEARTBEAT) {
                if (mboxq->vport) {
                        lpfc_debugfs_disc_trc(mboxq->vport,
                                LPFC_DISC_TRC_MBOX_VPORT,
                                "MBOX Send vport: cmd:x%x mb:x%x x%x",
                                mbx_cmnd, mqe->un.mb_words[0],
                                mqe->un.mb_words[1]);
                } else {
                        lpfc_debugfs_disc_trc(phba->pport,
                                LPFC_DISC_TRC_MBOX,
                                "MBOX Send: cmd:x%x mb:x%x x%x",
                                mbx_cmnd, mqe->un.mb_words[0],
                                mqe->un.mb_words[1]);
                }
        }
        psli->slistat.mbox_cmd++;

        /* Post the mailbox command to the port */
        rc = lpfc_sli4_mq_put(phba->sli4_hba.mbx_wq, mqe);
        if (rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "(%d):2533 Mailbox command x%x (x%x) "
                                "cannot issue Data: x%x x%x\n",
                                mboxq->vport ? mboxq->vport->vpi : 0,
                                mboxq->u.mb.mbxCommand,
                                lpfc_sli4_mbox_opcode_get(phba, mboxq),
                                psli->sli_flag, MBX_NOWAIT);
                goto out_not_finished;
        }

        return rc;

out_not_finished:
        spin_lock_irqsave(&phba->hbalock, iflags);
        mboxq->u.mb.mbxStatus = MBX_NOT_FINISHED;
        __lpfc_mbox_cmpl_put(phba, mboxq);
        /* Release the token */
        psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
        phba->sli.mbox_active = NULL;
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        return MBX_NOT_FINISHED;
}

/**
 * lpfc_sli_issue_mbox - Wrapper func for issuing mailbox command
 * @phba: Pointer to HBA context object.
 * @pmbox: Pointer to mailbox object.
 * @flag: Flag indicating how the mailbox need to be processed.
 *
 * This routine wraps the actual SLI3 or SLI4 mailbox issuing routine from
 * the API jump table function pointer from the lpfc_hba struct.
 *
 * Return codes the caller owns the mailbox command after the return of the
 * function.
 **/
int
lpfc_sli_issue_mbox(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmbox, uint32_t flag)
{
        return phba->lpfc_sli_issue_mbox(phba, pmbox, flag);
}

/**
 * lpfc_mbox_api_table_setup - Set up mbox api fucntion jump table
 * @phba: The hba struct for which this call is being executed.
 * @dev_grp: The HBA PCI-Device group number.
 *
 * This routine sets up the mbox interface API function jump table in @phba
 * struct.
 * Returns: 0 - success, -ENODEV - failure.
 **/
int
lpfc_mbox_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
{

        switch (dev_grp) {
        case LPFC_PCI_DEV_LP:
                phba->lpfc_sli_issue_mbox = lpfc_sli_issue_mbox_s3;
                phba->lpfc_sli_handle_slow_ring_event =
                                lpfc_sli_handle_slow_ring_event_s3;
                phba->lpfc_sli_hbq_to_firmware = lpfc_sli_hbq_to_firmware_s3;
                phba->lpfc_sli_brdrestart = lpfc_sli_brdrestart_s3;
                phba->lpfc_sli_brdready = lpfc_sli_brdready_s3;
                break;
        case LPFC_PCI_DEV_OC:
                phba->lpfc_sli_issue_mbox = lpfc_sli_issue_mbox_s4;
                phba->lpfc_sli_handle_slow_ring_event =
                                lpfc_sli_handle_slow_ring_event_s4;
                phba->lpfc_sli_hbq_to_firmware = lpfc_sli_hbq_to_firmware_s4;
                phba->lpfc_sli_brdrestart = lpfc_sli_brdrestart_s4;
                phba->lpfc_sli_brdready = lpfc_sli_brdready_s4;
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1420 Invalid HBA PCI-device group: 0x%x\n",
                                dev_grp);
                return -ENODEV;
                break;
        }
        return 0;
}

/**
 * __lpfc_sli_ringtx_put - Add an iocb to the txq
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @piocb: Pointer to address of newly added command iocb.
 *
 * This function is called with hbalock held to add a command
 * iocb to the txq when SLI layer cannot submit the command iocb
 * to the ring.
 **/
static void
__lpfc_sli_ringtx_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                    struct lpfc_iocbq *piocb)
{
        /* Insert the caller's iocb in the txq tail for later processing. */
        list_add_tail(&piocb->list, &pring->txq);
        pring->txq_cnt++;
}

/**
 * lpfc_sli_next_iocb - Get the next iocb in the txq
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @piocb: Pointer to address of newly added command iocb.
 *
 * This function is called with hbalock held before a new
 * iocb is submitted to the firmware. This function checks
 * txq to flush the iocbs in txq to Firmware before
 * submitting new iocbs to the Firmware.
 * If there are iocbs in the txq which need to be submitted
 * to firmware, lpfc_sli_next_iocb returns the first element
 * of the txq after dequeuing it from txq.
 * If there is no iocb in the txq then the function will return
 * *piocb and *piocb is set to NULL. Caller needs to check
 * *piocb to find if there are more commands in the txq.
 **/
static struct lpfc_iocbq *
lpfc_sli_next_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                   struct lpfc_iocbq **piocb)
{
        struct lpfc_iocbq * nextiocb;

        nextiocb = lpfc_sli_ringtx_get(phba, pring);
        if (!nextiocb) {
                nextiocb = *piocb;
                *piocb = NULL;
        }

        return nextiocb;
}

/**
 * __lpfc_sli_issue_iocb_s3 - SLI3 device lockless ver of lpfc_sli_issue_iocb
 * @phba: Pointer to HBA context object.
 * @ring_number: SLI ring number to issue iocb on.
 * @piocb: Pointer to command iocb.
 * @flag: Flag indicating if this command can be put into txq.
 *
 * __lpfc_sli_issue_iocb_s3 is used by other functions in the driver to issue
 * an iocb command to an HBA with SLI-3 interface spec. If the PCI slot is
 * recovering from error state, if HBA is resetting or if LPFC_STOP_IOCB_EVENT
 * flag is turned on, the function returns IOCB_ERROR. When the link is down,
 * this function allows only iocbs for posting buffers. This function finds
 * next available slot in the command ring and posts the command to the
 * available slot and writes the port attention register to request HBA start
 * processing new iocb. If there is no slot available in the ring and
 * flag & SLI_IOCB_RET_IOCB is set, the new iocb is added to the txq, otherwise
 * the function returns IOCB_BUSY.
 *
 * This function is called with hbalock held. The function will return success
 * after it successfully submit the iocb to firmware or after adding to the
 * txq.
 **/
static int
__lpfc_sli_issue_iocb_s3(struct lpfc_hba *phba, uint32_t ring_number,
                    struct lpfc_iocbq *piocb, uint32_t flag)
{
        struct lpfc_iocbq *nextiocb;
        IOCB_t *iocb;
        struct lpfc_sli_ring *pring = &phba->sli.ring[ring_number];

        if (piocb->iocb_cmpl && (!piocb->vport) &&
           (piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) &&
           (piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN)) {
                lpfc_printf_log(phba, KERN_ERR,
                                LOG_SLI | LOG_VPORT,
                                "1807 IOCB x%x failed. No vport\n",
                                piocb->iocb.ulpCommand);
                dump_stack();
                return IOCB_ERROR;
        }


        /* If the PCI channel is in offline state, do not post iocbs. */
        if (unlikely(pci_channel_offline(phba->pcidev)))
                return IOCB_ERROR;

        /* If HBA has a deferred error attention, fail the iocb. */
        if (unlikely(phba->hba_flag & DEFER_ERATT))
                return IOCB_ERROR;

        /*
         * We should never get an IOCB if we are in a < LINK_DOWN state
         */
        if (unlikely(phba->link_state < LPFC_LINK_DOWN))
                return IOCB_ERROR;

        /*
         * Check to see if we are blocking IOCB processing because of a
         * outstanding event.
         */
        if (unlikely(pring->flag & LPFC_STOP_IOCB_EVENT))
                goto iocb_busy;

        if (unlikely(phba->link_state == LPFC_LINK_DOWN)) {
                /*
                 * Only CREATE_XRI, CLOSE_XRI, and QUE_RING_BUF
                 * can be issued if the link is not up.
                 */
                switch (piocb->iocb.ulpCommand) {
                case CMD_GEN_REQUEST64_CR:
                case CMD_GEN_REQUEST64_CX:
                        if (!(phba->sli.sli_flag & LPFC_MENLO_MAINT) ||
                                (piocb->iocb.un.genreq64.w5.hcsw.Rctl !=
                                        FC_RCTL_DD_UNSOL_CMD) ||
                                (piocb->iocb.un.genreq64.w5.hcsw.Type !=
                                        MENLO_TRANSPORT_TYPE))

                                goto iocb_busy;
                        break;
                case CMD_QUE_RING_BUF_CN:
                case CMD_QUE_RING_BUF64_CN:
                        /*
                         * For IOCBs, like QUE_RING_BUF, that have no rsp ring
                         * completion, iocb_cmpl MUST be 0.
                         */
                        if (piocb->iocb_cmpl)
                                piocb->iocb_cmpl = NULL;
                        /*FALLTHROUGH*/
                case CMD_CREATE_XRI_CR:
                case CMD_CLOSE_XRI_CN:
                case CMD_CLOSE_XRI_CX:
                        break;
                default:
                        goto iocb_busy;
                }

        /*
         * For FCP commands, we must be in a state where we can process link
         * attention events.
         */
        } else if (unlikely(pring->ringno == phba->sli.fcp_ring &&
                            !(phba->sli.sli_flag & LPFC_PROCESS_LA))) {
                goto iocb_busy;
        }

        while ((iocb = lpfc_sli_next_iocb_slot(phba, pring)) &&
               (nextiocb = lpfc_sli_next_iocb(phba, pring, &piocb)))
                lpfc_sli_submit_iocb(phba, pring, iocb, nextiocb);

        if (iocb)
                lpfc_sli_update_ring(phba, pring);
        else
                lpfc_sli_update_full_ring(phba, pring);

        if (!piocb)
                return IOCB_SUCCESS;

        goto out_busy;

 iocb_busy:
        pring->stats.iocb_cmd_delay++;

 out_busy:

        if (!(flag & SLI_IOCB_RET_IOCB)) {
                __lpfc_sli_ringtx_put(phba, pring, piocb);
                return IOCB_SUCCESS;
        }

        return IOCB_BUSY;
}

/**
 * lpfc_sli4_bpl2sgl - Convert the bpl/bde to a sgl.
 * @phba: Pointer to HBA context object.
 * @piocb: Pointer to command iocb.
 * @sglq: Pointer to the scatter gather queue object.
 *
 * This routine converts the bpl or bde that is in the IOCB
 * to a sgl list for the sli4 hardware. The physical address
 * of the bpl/bde is converted back to a virtual address.
 * If the IOCB contains a BPL then the list of BDE's is
 * converted to sli4_sge's. If the IOCB contains a single
 * BDE then it is converted to a single sli_sge.
 * The IOCB is still in cpu endianess so the contents of
 * the bpl can be used without byte swapping.
 *
 * Returns valid XRI = Success, NO_XRI = Failure.
**/
static uint16_t
lpfc_sli4_bpl2sgl(struct lpfc_hba *phba, struct lpfc_iocbq *piocbq,
                struct lpfc_sglq *sglq)
{
        uint16_t xritag = NO_XRI;
        struct ulp_bde64 *bpl = NULL;
        struct ulp_bde64 bde;
        struct sli4_sge *sgl  = NULL;
        IOCB_t *icmd;
        int numBdes = 0;
        int i = 0;

        if (!piocbq || !sglq)
                return xritag;

        sgl  = (struct sli4_sge *)sglq->sgl;
        icmd = &piocbq->iocb;
        if (icmd->un.genreq64.bdl.bdeFlags == BUFF_TYPE_BLP_64) {
                numBdes = icmd->un.genreq64.bdl.bdeSize /
                                sizeof(struct ulp_bde64);
                /* The addrHigh and addrLow fields within the IOCB
                 * have not been byteswapped yet so there is no
                 * need to swap them back.
                 */
                bpl  = (struct ulp_bde64 *)
                        ((struct lpfc_dmabuf *)piocbq->context3)->virt;

                if (!bpl)
                        return xritag;

                for (i = 0; i < numBdes; i++) {
                        /* Should already be byte swapped. */
                        sgl->addr_hi = bpl->addrHigh;
                        sgl->addr_lo = bpl->addrLow;

                        if ((i+1) == numBdes)
                                bf_set(lpfc_sli4_sge_last, sgl, 1);
                        else
                                bf_set(lpfc_sli4_sge_last, sgl, 0);
                        sgl->word2 = cpu_to_le32(sgl->word2);
                        /* swap the size field back to the cpu so we
                         * can assign it to the sgl.
                         */
                        bde.tus.w = le32_to_cpu(bpl->tus.w);
                        sgl->sge_len = cpu_to_le32(bde.tus.f.bdeSize);
                        bpl++;
                        sgl++;
                }
        } else if (icmd->un.genreq64.bdl.bdeFlags == BUFF_TYPE_BDE_64) {
                        /* The addrHigh and addrLow fields of the BDE have not
                         * been byteswapped yet so they need to be swapped
                         * before putting them in the sgl.
                         */
                        sgl->addr_hi =
                                cpu_to_le32(icmd->un.genreq64.bdl.addrHigh);
                        sgl->addr_lo =
                                cpu_to_le32(icmd->un.genreq64.bdl.addrLow);
                        bf_set(lpfc_sli4_sge_last, sgl, 1);
                        sgl->word2 = cpu_to_le32(sgl->word2);
                        sgl->sge_len =
                                cpu_to_le32(icmd->un.genreq64.bdl.bdeSize);
        }
        return sglq->sli4_xritag;
}

/**
 * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
 * @phba: Pointer to HBA context object.
 *
 * This routine performs a round robin SCSI command to SLI4 FCP WQ index
 * distribution.  This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
 * held.
 *
 * Return: index into SLI4 fast-path FCP queue index.
 **/
static uint32_t
lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba)
{
        ++phba->fcp_qidx;
        if (phba->fcp_qidx >= phba->cfg_fcp_wq_count)
                phba->fcp_qidx = 0;

        return phba->fcp_qidx;
}

/**
 * lpfc_sli_iocb2wqe - Convert the IOCB to a work queue entry.
 * @phba: Pointer to HBA context object.
 * @piocb: Pointer to command iocb.
 * @wqe: Pointer to the work queue entry.
 *
 * This routine converts the iocb command to its Work Queue Entry
 * equivalent. The wqe pointer should not have any fields set when
 * this routine is called because it will memcpy over them.
 * This routine does not set the CQ_ID or the WQEC bits in the
 * wqe.
 *
 * Returns: 0 = Success, IOCB_ERROR = Failure.
 **/
static int
lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
                union lpfc_wqe *wqe)
{
        uint32_t xmit_len = 0, total_len = 0;
        uint8_t ct = 0;
        uint32_t fip;
        uint32_t abort_tag;
        uint8_t command_type = ELS_COMMAND_NON_FIP;
        uint8_t cmnd;
        uint16_t xritag;
        struct ulp_bde64 *bpl = NULL;
        uint32_t els_id = ELS_ID_DEFAULT;
        int numBdes, i;
        struct ulp_bde64 bde;

        fip = phba->hba_flag & HBA_FIP_SUPPORT;
        /* The fcp commands will set command type */
        if (iocbq->iocb_flag &  LPFC_IO_FCP)
                command_type = FCP_COMMAND;
        else if (fip && (iocbq->iocb_flag & LPFC_FIP_ELS_ID_MASK))
                command_type = ELS_COMMAND_FIP;
        else
                command_type = ELS_COMMAND_NON_FIP;

        /* Some of the fields are in the right position already */
        memcpy(wqe, &iocbq->iocb, sizeof(union lpfc_wqe));
        abort_tag = (uint32_t) iocbq->iotag;
        xritag = iocbq->sli4_xritag;
        wqe->words[7] = 0; /* The ct field has moved so reset */
        /* words0-2 bpl convert bde */
        if (iocbq->iocb.un.genreq64.bdl.bdeFlags == BUFF_TYPE_BLP_64) {
                numBdes = iocbq->iocb.un.genreq64.bdl.bdeSize /
                                sizeof(struct ulp_bde64);
                bpl  = (struct ulp_bde64 *)
                        ((struct lpfc_dmabuf *)iocbq->context3)->virt;
                if (!bpl)
                        return IOCB_ERROR;

                /* Should already be byte swapped. */
                wqe->generic.bde.addrHigh =  le32_to_cpu(bpl->addrHigh);
                wqe->generic.bde.addrLow =  le32_to_cpu(bpl->addrLow);
                /* swap the size field back to the cpu so we
                 * can assign it to the sgl.
                 */
                wqe->generic.bde.tus.w  = le32_to_cpu(bpl->tus.w);
                xmit_len = wqe->generic.bde.tus.f.bdeSize;
                total_len = 0;
                for (i = 0; i < numBdes; i++) {
                        bde.tus.w  = le32_to_cpu(bpl[i].tus.w);
                        total_len += bde.tus.f.bdeSize;
                }
        } else
                xmit_len = iocbq->iocb.un.fcpi64.bdl.bdeSize;

        iocbq->iocb.ulpIoTag = iocbq->iotag;
        cmnd = iocbq->iocb.ulpCommand;

        switch (iocbq->iocb.ulpCommand) {
        case CMD_ELS_REQUEST64_CR:
                if (!iocbq->iocb.ulpLe) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2007 Only Limited Edition cmd Format"
                                " supported 0x%x\n",
                                iocbq->iocb.ulpCommand);
                        return IOCB_ERROR;
                }
                wqe->els_req.payload_len = xmit_len;
                /* Els_reguest64 has a TMO */
                bf_set(wqe_tmo, &wqe->els_req.wqe_com,
                        iocbq->iocb.ulpTimeout);
                /* Need a VF for word 4 set the vf bit*/
                bf_set(els_req64_vf, &wqe->els_req, 0);
                /* And a VFID for word 12 */
                bf_set(els_req64_vfid, &wqe->els_req, 0);
                /*
                 * Set ct field to 3, indicates that the context_tag field
                 * contains the FCFI and remote N_Port_ID is
                 * in word 5.
                 */

                ct = ((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l);
                bf_set(lpfc_wqe_gen_context, &wqe->generic,
                                iocbq->iocb.ulpContext);

                bf_set(lpfc_wqe_gen_ct, &wqe->generic, ct);
                bf_set(lpfc_wqe_gen_pu, &wqe->generic, 0);
                /* CCP CCPE PV PRI in word10 were set in the memcpy */

                if (command_type == ELS_COMMAND_FIP) {
                        els_id = ((iocbq->iocb_flag & LPFC_FIP_ELS_ID_MASK)
                                        >> LPFC_FIP_ELS_ID_SHIFT);
                }
                bf_set(lpfc_wqe_gen_els_id, &wqe->generic, els_id);

        break;
        case CMD_XMIT_SEQUENCE64_CX:
                bf_set(lpfc_wqe_gen_context, &wqe->generic,
                                        iocbq->iocb.un.ulpWord[3]);
                wqe->generic.word3 = 0;
                bf_set(wqe_rcvoxid, &wqe->generic, iocbq->iocb.ulpContext);
                /* The entire sequence is transmitted for this IOCB */
                xmit_len = total_len;
                cmnd = CMD_XMIT_SEQUENCE64_CR;
        case CMD_XMIT_SEQUENCE64_CR:
                /* word3 iocb=io_tag32 wqe=payload_offset */
                /* payload offset used for multilpe outstanding
                 * sequences on the same exchange
                 */
                wqe->words[3] = 0;
                /* word4 relative_offset memcpy */
                /* word5 r_ctl/df_ctl memcpy */
                bf_set(lpfc_wqe_gen_pu, &wqe->generic, 0);
                wqe->xmit_sequence.xmit_len = xmit_len;
                command_type = OTHER_COMMAND;
        break;
        case CMD_XMIT_BCAST64_CN:
                /* word3 iocb=iotag32 wqe=payload_len */
                wqe->words[3] = 0; /* no definition for this in wqe */
                /* word4 iocb=rsvd wqe=rsvd */
                /* word5 iocb=rctl/type/df_ctl wqe=rctl/type/df_ctl memcpy */
                /* word6 iocb=ctxt_tag/io_tag wqe=ctxt_tag/xri */
                bf_set(lpfc_wqe_gen_ct, &wqe->generic,
                        ((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l));
        break;
        case CMD_FCP_IWRITE64_CR:
                command_type = FCP_COMMAND_DATA_OUT;
                /* The struct for wqe fcp_iwrite has 3 fields that are somewhat
                 * confusing.
                 * word3 is payload_len: byte offset to the sgl entry for the
                 * fcp_command.
                 * word4 is total xfer len, same as the IOCB->ulpParameter.
                 * word5 is initial xfer len 0 = wait for xfer-ready
                 */

                /* Always wait for xfer-ready before sending data */
                wqe->fcp_iwrite.initial_xfer_len = 0;
                /* word 4 (xfer length) should have been set on the memcpy */

        /* allow write to fall through to read */
        case CMD_FCP_IREAD64_CR:
                /* FCP_CMD is always the 1st sgl entry */
                wqe->fcp_iread.payload_len =
                        xmit_len + sizeof(struct fcp_rsp);

                /* word 4 (xfer length) should have been set on the memcpy */

                bf_set(lpfc_wqe_gen_erp, &wqe->generic,
                        iocbq->iocb.ulpFCP2Rcvy);
                bf_set(lpfc_wqe_gen_lnk, &wqe->generic, iocbq->iocb.ulpXS);
                /* The XC bit and the XS bit are similar. The driver never
                 * tracked whether or not the exchange was previouslly open.
                 * XC = Exchange create, 0 is create. 1 is already open.
                 * XS = link cmd: 1 do not close the exchange after command.
                 * XS = 0 close exchange when command completes.
                 * The only time we would not set the XC bit is when the XS bit
                 * is set and we are sending our 2nd or greater command on
                 * this exchange.
                 */
                /* Always open the exchange */
                bf_set(wqe_xc, &wqe->fcp_iread.wqe_com, 0);

                wqe->words[10] &= 0xffff0000; /* zero out ebde count */
                bf_set(lpfc_wqe_gen_pu, &wqe->generic, iocbq->iocb.ulpPU);
                break;
        case CMD_FCP_ICMND64_CR:
                /* Always open the exchange */
                bf_set(wqe_xc, &wqe->fcp_iread.wqe_com, 0);

                wqe->words[4] = 0;
                wqe->words[10] &= 0xffff0000; /* zero out ebde count */
                bf_set(lpfc_wqe_gen_pu, &wqe->generic, 0);
        break;
        case CMD_GEN_REQUEST64_CR:
                /* word3 command length is described as byte offset to the
                 * rsp_data. Would always be 16, sizeof(struct sli4_sge)
                 * sgl[0] = cmnd
                 * sgl[1] = rsp.
                 *
                 */
                wqe->gen_req.command_len = xmit_len;
                /* Word4 parameter  copied in the memcpy */
                /* Word5 [rctl, type, df_ctl, la] copied in memcpy */
                /* word6 context tag copied in memcpy */
                if (iocbq->iocb.ulpCt_h  || iocbq->iocb.ulpCt_l) {
                        ct = ((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l);
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2015 Invalid CT %x command 0x%x\n",
                                ct, iocbq->iocb.ulpCommand);
                        return IOCB_ERROR;
                }
                bf_set(lpfc_wqe_gen_ct, &wqe->generic, 0);
                bf_set(wqe_tmo, &wqe->gen_req.wqe_com,
                        iocbq->iocb.ulpTimeout);

                bf_set(lpfc_wqe_gen_pu, &wqe->generic, iocbq->iocb.ulpPU);
                command_type = OTHER_COMMAND;
        break;
        case CMD_XMIT_ELS_RSP64_CX:
                /* words0-2 BDE memcpy */
                /* word3 iocb=iotag32 wqe=rsvd */
                wqe->words[3] = 0;
                /* word4 iocb=did wge=rsvd. */
                wqe->words[4] = 0;
                /* word5 iocb=rsvd wge=did */
                bf_set(wqe_els_did, &wqe->xmit_els_rsp.wqe_dest,
                         iocbq->iocb.un.elsreq64.remoteID);

                bf_set(lpfc_wqe_gen_ct, &wqe->generic,
                        ((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l));

                bf_set(lpfc_wqe_gen_pu, &wqe->generic, iocbq->iocb.ulpPU);
                bf_set(wqe_rcvoxid, &wqe->generic, iocbq->iocb.ulpContext);
                if (!iocbq->iocb.ulpCt_h && iocbq->iocb.ulpCt_l)
                        bf_set(lpfc_wqe_gen_context, &wqe->generic,
                               iocbq->vport->vpi + phba->vpi_base);
                command_type = OTHER_COMMAND;
        break;
        case CMD_CLOSE_XRI_CN:
        case CMD_ABORT_XRI_CN:
        case CMD_ABORT_XRI_CX:
                /* words 0-2 memcpy should be 0 rserved */
                /* port will send abts */
                if (iocbq->iocb.ulpCommand == CMD_CLOSE_XRI_CN)
                        /*
                         * The link is down so the fw does not need to send abts
                         * on the wire.
                         */
                        bf_set(abort_cmd_ia, &wqe->abort_cmd, 1);
                else
                        bf_set(abort_cmd_ia, &wqe->abort_cmd, 0);
                bf_set(abort_cmd_criteria, &wqe->abort_cmd, T_XRI_TAG);
                wqe->words[5] = 0;
                bf_set(lpfc_wqe_gen_ct, &wqe->generic,
                        ((iocbq->iocb.ulpCt_h << 1) | iocbq->iocb.ulpCt_l));
                abort_tag = iocbq->iocb.un.acxri.abortIoTag;
                /*
                 * The abort handler will send us CMD_ABORT_XRI_CN or
                 * CMD_CLOSE_XRI_CN and the fw only accepts CMD_ABORT_XRI_CX
                 */
                bf_set(lpfc_wqe_gen_command, &wqe->generic, CMD_ABORT_XRI_CX);
                cmnd = CMD_ABORT_XRI_CX;
                command_type = OTHER_COMMAND;
                xritag = 0;
        break;
        case CMD_XMIT_BLS_RSP64_CX:
                /* As BLS ABTS-ACC WQE is very different from other WQEs,
                 * we re-construct this WQE here based on information in
                 * iocbq from scratch.
                 */
                memset(wqe, 0, sizeof(union lpfc_wqe));
                /* OX_ID is invariable to who sent ABTS to CT exchange */
                bf_set(xmit_bls_rsp64_oxid, &wqe->xmit_bls_rsp,
                       bf_get(lpfc_abts_oxid, &iocbq->iocb.un.bls_acc));
                if (bf_get(lpfc_abts_orig, &iocbq->iocb.un.bls_acc) ==
                    LPFC_ABTS_UNSOL_INT) {
                        /* ABTS sent by initiator to CT exchange, the
                         * RX_ID field will be filled with the newly
                         * allocated responder XRI.
                         */
                        bf_set(xmit_bls_rsp64_rxid, &wqe->xmit_bls_rsp,
                               iocbq->sli4_xritag);
                } else {
                        /* ABTS sent by responder to CT exchange, the
                         * RX_ID field will be filled with the responder
                         * RX_ID from ABTS.
                         */
                        bf_set(xmit_bls_rsp64_rxid, &wqe->xmit_bls_rsp,
                               bf_get(lpfc_abts_rxid, &iocbq->iocb.un.bls_acc));
                }
                bf_set(xmit_bls_rsp64_seqcnthi, &wqe->xmit_bls_rsp, 0xffff);
                bf_set(wqe_xmit_bls_pt, &wqe->xmit_bls_rsp.wqe_dest, 0x1);
                bf_set(wqe_ctxt_tag, &wqe->xmit_bls_rsp.wqe_com,
                       iocbq->iocb.ulpContext);
                /* Overwrite the pre-set comnd type with OTHER_COMMAND */
                command_type = OTHER_COMMAND;
        break;
        case CMD_XRI_ABORTED_CX:
        case CMD_CREATE_XRI_CR: /* Do we expect to use this? */
                /* words0-2 are all 0's no bde */
                /* word3 and word4 are rsvrd */
                wqe->words[3] = 0;
                wqe->words[4] = 0;
                /* word5 iocb=rsvd wge=did */
                /* There is no remote port id in the IOCB? */
                /* Let this fall through and fail */
        case CMD_IOCB_FCP_IBIDIR64_CR: /* bidirectional xfer */
        case CMD_FCP_TSEND64_CX: /* Target mode send xfer-ready */
        case CMD_FCP_TRSP64_CX: /* Target mode rcv */
        case CMD_FCP_AUTO_TRSP_CX: /* Auto target rsp */
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2014 Invalid command 0x%x\n",
                                iocbq->iocb.ulpCommand);
                return IOCB_ERROR;
        break;

        }
        bf_set(lpfc_wqe_gen_xri, &wqe->generic, xritag);
        bf_set(lpfc_wqe_gen_request_tag, &wqe->generic, iocbq->iotag);
        wqe->generic.abort_tag = abort_tag;
        bf_set(lpfc_wqe_gen_cmd_type, &wqe->generic, command_type);
        bf_set(lpfc_wqe_gen_command, &wqe->generic, cmnd);
        bf_set(lpfc_wqe_gen_class, &wqe->generic, iocbq->iocb.ulpClass);
        bf_set(lpfc_wqe_gen_cq_id, &wqe->generic, LPFC_WQE_CQ_ID_DEFAULT);

        return 0;
}

/**
 * __lpfc_sli_issue_iocb_s4 - SLI4 device lockless ver of lpfc_sli_issue_iocb
 * @phba: Pointer to HBA context object.
 * @ring_number: SLI ring number to issue iocb on.
 * @piocb: Pointer to command iocb.
 * @flag: Flag indicating if this command can be put into txq.
 *
 * __lpfc_sli_issue_iocb_s4 is used by other functions in the driver to issue
 * an iocb command to an HBA with SLI-4 interface spec.
 *
 * This function is called with hbalock held. The function will return success
 * after it successfully submit the iocb to firmware or after adding to the
 * txq.
 **/
static int
__lpfc_sli_issue_iocb_s4(struct lpfc_hba *phba, uint32_t ring_number,
                         struct lpfc_iocbq *piocb, uint32_t flag)
{
        struct lpfc_sglq *sglq;
        uint16_t xritag;
        union lpfc_wqe wqe;
        struct lpfc_sli_ring *pring = &phba->sli.ring[ring_number];

        if (piocb->sli4_xritag == NO_XRI) {
                if (piocb->iocb.ulpCommand == CMD_ABORT_XRI_CN ||
                    piocb->iocb.ulpCommand == CMD_CLOSE_XRI_CN)
                        sglq = NULL;
                else {
                        sglq = __lpfc_sli_get_sglq(phba);
                        if (!sglq)
                                return IOCB_ERROR;
                        piocb->sli4_xritag = sglq->sli4_xritag;
                }
        } else if (piocb->iocb_flag &  LPFC_IO_FCP) {
                sglq = NULL; /* These IO's already have an XRI and
                              * a mapped sgl.
                              */
        } else {
                /* This is a continuation of a commandi,(CX) so this
                 * sglq is on the active list
                 */
                sglq = __lpfc_get_active_sglq(phba, piocb->sli4_xritag);
                if (!sglq)
                        return IOCB_ERROR;
        }

        if (sglq) {
                xritag = lpfc_sli4_bpl2sgl(phba, piocb, sglq);
                if (xritag != sglq->sli4_xritag)
                        return IOCB_ERROR;
        }

        if (lpfc_sli4_iocb2wqe(phba, piocb, &wqe))
                return IOCB_ERROR;

        if ((piocb->iocb_flag & LPFC_IO_FCP) ||
                (piocb->iocb_flag & LPFC_USE_FCPWQIDX)) {
                /*
                 * For FCP command IOCB, get a new WQ index to distribute
                 * WQE across the WQsr. On the other hand, for abort IOCB,
                 * it carries the same WQ index to the original command
                 * IOCB.
                 */
                if (piocb->iocb_flag & LPFC_IO_FCP)
                        piocb->fcp_wqidx = lpfc_sli4_scmd_to_wqidx_distr(phba);
                if (lpfc_sli4_wq_put(phba->sli4_hba.fcp_wq[piocb->fcp_wqidx],
                                     &wqe))
                        return IOCB_ERROR;
        } else {
                if (lpfc_sli4_wq_put(phba->sli4_hba.els_wq, &wqe))
                        return IOCB_ERROR;
        }
        lpfc_sli_ringtxcmpl_put(phba, pring, piocb);

        return 0;
}

/**
 * __lpfc_sli_issue_iocb - Wrapper func of lockless version for issuing iocb
 *
 * This routine wraps the actual lockless version for issusing IOCB function
 * pointer from the lpfc_hba struct.
 *
 * Return codes:
 *      IOCB_ERROR - Error
 *      IOCB_SUCCESS - Success
 *      IOCB_BUSY - Busy
 **/
static inline int
__lpfc_sli_issue_iocb(struct lpfc_hba *phba, uint32_t ring_number,
                struct lpfc_iocbq *piocb, uint32_t flag)
{
        return phba->__lpfc_sli_issue_iocb(phba, ring_number, piocb, flag);
}

/**
 * lpfc_sli_api_table_setup - Set up sli api fucntion jump table
 * @phba: The hba struct for which this call is being executed.
 * @dev_grp: The HBA PCI-Device group number.
 *
 * This routine sets up the SLI interface API function jump table in @phba
 * struct.
 * Returns: 0 - success, -ENODEV - failure.
 **/
int
lpfc_sli_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
{

        switch (dev_grp) {
        case LPFC_PCI_DEV_LP:
                phba->__lpfc_sli_issue_iocb = __lpfc_sli_issue_iocb_s3;
                phba->__lpfc_sli_release_iocbq = __lpfc_sli_release_iocbq_s3;
                break;
        case LPFC_PCI_DEV_OC:
                phba->__lpfc_sli_issue_iocb = __lpfc_sli_issue_iocb_s4;
                phba->__lpfc_sli_release_iocbq = __lpfc_sli_release_iocbq_s4;
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1419 Invalid HBA PCI-device group: 0x%x\n",
                                dev_grp);
                return -ENODEV;
                break;
        }
        phba->lpfc_get_iocb_from_iocbq = lpfc_get_iocb_from_iocbq;
        return 0;
}

/**
 * lpfc_sli_issue_iocb - Wrapper function for __lpfc_sli_issue_iocb
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @piocb: Pointer to command iocb.
 * @flag: Flag indicating if this command can be put into txq.
 *
 * lpfc_sli_issue_iocb is a wrapper around __lpfc_sli_issue_iocb
 * function. This function gets the hbalock and calls
 * __lpfc_sli_issue_iocb function and will return the error returned
 * by __lpfc_sli_issue_iocb function. This wrapper is used by
 * functions which do not hold hbalock.
 **/
int
lpfc_sli_issue_iocb(struct lpfc_hba *phba, uint32_t ring_number,
                    struct lpfc_iocbq *piocb, uint32_t flag)
{
        unsigned long iflags;
        int rc;

        spin_lock_irqsave(&phba->hbalock, iflags);
        rc = __lpfc_sli_issue_iocb(phba, ring_number, piocb, flag);
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        return rc;
}

/**
 * lpfc_extra_ring_setup - Extra ring setup function
 * @phba: Pointer to HBA context object.
 *
 * This function is called while driver attaches with the
 * HBA to setup the extra ring. The extra ring is used
 * only when driver needs to support target mode functionality
 * or IP over FC functionalities.
 *
 * This function is called with no lock held.
 **/
static int
lpfc_extra_ring_setup( struct lpfc_hba *phba)
{
        struct lpfc_sli *psli;
        struct lpfc_sli_ring *pring;

        psli = &phba->sli;

        /* Adjust cmd/rsp ring iocb entries more evenly */

        /* Take some away from the FCP ring */
        pring = &psli->ring[psli->fcp_ring];
        pring->numCiocb -= SLI2_IOCB_CMD_R1XTRA_ENTRIES;
        pring->numRiocb -= SLI2_IOCB_RSP_R1XTRA_ENTRIES;
        pring->numCiocb -= SLI2_IOCB_CMD_R3XTRA_ENTRIES;
        pring->numRiocb -= SLI2_IOCB_RSP_R3XTRA_ENTRIES;

        /* and give them to the extra ring */
        pring = &psli->ring[psli->extra_ring];

        pring->numCiocb += SLI2_IOCB_CMD_R1XTRA_ENTRIES;
        pring->numRiocb += SLI2_IOCB_RSP_R1XTRA_ENTRIES;
        pring->numCiocb += SLI2_IOCB_CMD_R3XTRA_ENTRIES;
        pring->numRiocb += SLI2_IOCB_RSP_R3XTRA_ENTRIES;

        /* Setup default profile for this ring */
        pring->iotag_max = 4096;
        pring->num_mask = 1;
        pring->prt[0].profile = 0;      /* Mask 0 */
        pring->prt[0].rctl = phba->cfg_multi_ring_rctl;
        pring->prt[0].type = phba->cfg_multi_ring_type;
        pring->prt[0].lpfc_sli_rcv_unsol_event = NULL;
        return 0;
}

/**
 * lpfc_sli_async_event_handler - ASYNC iocb handler function
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @iocbq: Pointer to iocb object.
 *
 * This function is called by the slow ring event handler
 * function when there is an ASYNC event iocb in the ring.
 * This function is called with no lock held.
 * Currently this function handles only temperature related
 * ASYNC events. The function decodes the temperature sensor
 * event message and posts events for the management applications.
 **/
static void
lpfc_sli_async_event_handler(struct lpfc_hba * phba,
        struct lpfc_sli_ring * pring, struct lpfc_iocbq * iocbq)
{
        IOCB_t *icmd;
        uint16_t evt_code;
        uint16_t temp;
        struct temp_event temp_event_data;
        struct Scsi_Host *shost;
        uint32_t *iocb_w;

        icmd = &iocbq->iocb;
        evt_code = icmd->un.asyncstat.evt_code;
        temp = icmd->ulpContext;

        if ((evt_code != ASYNC_TEMP_WARN) &&
                (evt_code != ASYNC_TEMP_SAFE)) {
                iocb_w = (uint32_t *) icmd;
                lpfc_printf_log(phba,
                        KERN_ERR,
                        LOG_SLI,
                        "0346 Ring %d handler: unexpected ASYNC_STATUS"
                        " evt_code 0x%x\n"
                        "W0  0x%08x W1  0x%08x W2  0x%08x W3  0x%08x\n"
                        "W4  0x%08x W5  0x%08x W6  0x%08x W7  0x%08x\n"
                        "W8  0x%08x W9  0x%08x W10 0x%08x W11 0x%08x\n"
                        "W12 0x%08x W13 0x%08x W14 0x%08x W15 0x%08x\n",
                        pring->ringno,
                        icmd->un.asyncstat.evt_code,
                        iocb_w[0], iocb_w[1], iocb_w[2], iocb_w[3],
                        iocb_w[4], iocb_w[5], iocb_w[6], iocb_w[7],
                        iocb_w[8], iocb_w[9], iocb_w[10], iocb_w[11],
                        iocb_w[12], iocb_w[13], iocb_w[14], iocb_w[15]);

                return;
        }
        temp_event_data.data = (uint32_t)temp;
        temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT;
        if (evt_code == ASYNC_TEMP_WARN) {
                temp_event_data.event_code = LPFC_THRESHOLD_TEMP;
                lpfc_printf_log(phba,
                                KERN_ERR,
                                LOG_TEMP,
                                "0347 Adapter is very hot, please take "
                                "corrective action. temperature : %d Celsius\n",
                                temp);
        }
        if (evt_code == ASYNC_TEMP_SAFE) {
                temp_event_data.event_code = LPFC_NORMAL_TEMP;
                lpfc_printf_log(phba,
                                KERN_ERR,
                                LOG_TEMP,
                                "0340 Adapter temperature is OK now. "
                                "temperature : %d Celsius\n",
                                temp);
        }

        /* Send temperature change event to applications */
        shost = lpfc_shost_from_vport(phba->pport);
        fc_host_post_vendor_event(shost, fc_get_event_number(),
                sizeof(temp_event_data), (char *) &temp_event_data,
                LPFC_NL_VENDOR_ID);

}


/**
 * lpfc_sli_setup - SLI ring setup function
 * @phba: Pointer to HBA context object.
 *
 * lpfc_sli_setup sets up rings of the SLI interface with
 * number of iocbs per ring and iotags. This function is
 * called while driver attach to the HBA and before the
 * interrupts are enabled. So there is no need for locking.
 *
 * This function always returns 0.
 **/
int
lpfc_sli_setup(struct lpfc_hba *phba)
{
        int i, totiocbsize = 0;
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_sli_ring *pring;

        psli->num_rings = MAX_CONFIGURED_RINGS;
        psli->sli_flag = 0;
        psli->fcp_ring = LPFC_FCP_RING;
        psli->next_ring = LPFC_FCP_NEXT_RING;
        psli->extra_ring = LPFC_EXTRA_RING;

        psli->iocbq_lookup = NULL;
        psli->iocbq_lookup_len = 0;
        psli->last_iotag = 0;

        for (i = 0; i < psli->num_rings; i++) {
                pring = &psli->ring[i];
                switch (i) {
                case LPFC_FCP_RING:     /* ring 0 - FCP */
                        /* numCiocb and numRiocb are used in config_port */
                        pring->numCiocb = SLI2_IOCB_CMD_R0_ENTRIES;
                        pring->numRiocb = SLI2_IOCB_RSP_R0_ENTRIES;
                        pring->numCiocb += SLI2_IOCB_CMD_R1XTRA_ENTRIES;
                        pring->numRiocb += SLI2_IOCB_RSP_R1XTRA_ENTRIES;
                        pring->numCiocb += SLI2_IOCB_CMD_R3XTRA_ENTRIES;
                        pring->numRiocb += SLI2_IOCB_RSP_R3XTRA_ENTRIES;
                        pring->sizeCiocb = (phba->sli_rev == 3) ?
                                                        SLI3_IOCB_CMD_SIZE :
                                                        SLI2_IOCB_CMD_SIZE;
                        pring->sizeRiocb = (phba->sli_rev == 3) ?
                                                        SLI3_IOCB_RSP_SIZE :
                                                        SLI2_IOCB_RSP_SIZE;
                        pring->iotag_ctr = 0;
                        pring->iotag_max =
                            (phba->cfg_hba_queue_depth * 2);
                        pring->fast_iotag = pring->iotag_max;
                        pring->num_mask = 0;
                        break;
                case LPFC_EXTRA_RING:   /* ring 1 - EXTRA */
                        /* numCiocb and numRiocb are used in config_port */
                        pring->numCiocb = SLI2_IOCB_CMD_R1_ENTRIES;
                        pring->numRiocb = SLI2_IOCB_RSP_R1_ENTRIES;
                        pring->sizeCiocb = (phba->sli_rev == 3) ?
                                                        SLI3_IOCB_CMD_SIZE :
                                                        SLI2_IOCB_CMD_SIZE;
                        pring->sizeRiocb = (phba->sli_rev == 3) ?
                                                        SLI3_IOCB_RSP_SIZE :
                                                        SLI2_IOCB_RSP_SIZE;
                        pring->iotag_max = phba->cfg_hba_queue_depth;
                        pring->num_mask = 0;
                        break;
                case LPFC_ELS_RING:     /* ring 2 - ELS / CT */
                        /* numCiocb and numRiocb are used in config_port */
                        pring->numCiocb = SLI2_IOCB_CMD_R2_ENTRIES;
                        pring->numRiocb = SLI2_IOCB_RSP_R2_ENTRIES;
                        pring->sizeCiocb = (phba->sli_rev == 3) ?
                                                        SLI3_IOCB_CMD_SIZE :
                                                        SLI2_IOCB_CMD_SIZE;
                        pring->sizeRiocb = (phba->sli_rev == 3) ?
                                                        SLI3_IOCB_RSP_SIZE :
                                                        SLI2_IOCB_RSP_SIZE;
                        pring->fast_iotag = 0;
                        pring->iotag_ctr = 0;
                        pring->iotag_max = 4096;
                        pring->lpfc_sli_rcv_async_status =
                                lpfc_sli_async_event_handler;
                        pring->num_mask = LPFC_MAX_RING_MASK;
                        pring->prt[0].profile = 0;      /* Mask 0 */
                        pring->prt[0].rctl = FC_RCTL_ELS_REQ;
                        pring->prt[0].type = FC_TYPE_ELS;
                        pring->prt[0].lpfc_sli_rcv_unsol_event =
                            lpfc_els_unsol_event;
                        pring->prt[1].profile = 0;      /* Mask 1 */
                        pring->prt[1].rctl = FC_RCTL_ELS_REP;
                        pring->prt[1].type = FC_TYPE_ELS;
                        pring->prt[1].lpfc_sli_rcv_unsol_event =
                            lpfc_els_unsol_event;
                        pring->prt[2].profile = 0;      /* Mask 2 */
                        /* NameServer Inquiry */
                        pring->prt[2].rctl = FC_RCTL_DD_UNSOL_CTL;
                        /* NameServer */
                        pring->prt[2].type = FC_TYPE_CT;
                        pring->prt[2].lpfc_sli_rcv_unsol_event =
                            lpfc_ct_unsol_event;
                        pring->prt[3].profile = 0;      /* Mask 3 */
                        /* NameServer response */
                        pring->prt[3].rctl = FC_RCTL_DD_SOL_CTL;
                        /* NameServer */
                        pring->prt[3].type = FC_TYPE_CT;
                        pring->prt[3].lpfc_sli_rcv_unsol_event =
                            lpfc_ct_unsol_event;
                        /* abort unsolicited sequence */
                        pring->prt[4].profile = 0;      /* Mask 4 */
                        pring->prt[4].rctl = FC_RCTL_BA_ABTS;
                        pring->prt[4].type = FC_TYPE_BLS;
                        pring->prt[4].lpfc_sli_rcv_unsol_event =
                            lpfc_sli4_ct_abort_unsol_event;
                        break;
                }
                totiocbsize += (pring->numCiocb * pring->sizeCiocb) +
                                (pring->numRiocb * pring->sizeRiocb);
        }
        if (totiocbsize > MAX_SLIM_IOCB_SIZE) {
                /* Too many cmd / rsp ring entries in SLI2 SLIM */
                printk(KERN_ERR "%d:0462 Too many cmd / rsp ring entries in "
                       "SLI2 SLIM Data: x%x x%lx\n",
                       phba->brd_no, totiocbsize,
                       (unsigned long) MAX_SLIM_IOCB_SIZE);
        }
        if (phba->cfg_multi_ring_support == 2)
                lpfc_extra_ring_setup(phba);

        return 0;
}

/**
 * lpfc_sli_queue_setup - Queue initialization function
 * @phba: Pointer to HBA context object.
 *
 * lpfc_sli_queue_setup sets up mailbox queues and iocb queues for each
 * ring. This function also initializes ring indices of each ring.
 * This function is called during the initialization of the SLI
 * interface of an HBA.
 * This function is called with no lock held and always returns
 * 1.
 **/
int
lpfc_sli_queue_setup(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli;
        struct lpfc_sli_ring *pring;
        int i;

        psli = &phba->sli;
        spin_lock_irq(&phba->hbalock);
        INIT_LIST_HEAD(&psli->mboxq);
        INIT_LIST_HEAD(&psli->mboxq_cmpl);
        /* Initialize list headers for txq and txcmplq as double linked lists */
        for (i = 0; i < psli->num_rings; i++) {
                pring = &psli->ring[i];
                pring->ringno = i;
                pring->next_cmdidx  = 0;
                pring->local_getidx = 0;
                pring->cmdidx = 0;
                INIT_LIST_HEAD(&pring->txq);
                INIT_LIST_HEAD(&pring->txcmplq);
                INIT_LIST_HEAD(&pring->iocb_continueq);
                INIT_LIST_HEAD(&pring->iocb_continue_saveq);
                INIT_LIST_HEAD(&pring->postbufq);
        }
        spin_unlock_irq(&phba->hbalock);
        return 1;
}

/**
 * lpfc_sli_mbox_sys_flush - Flush mailbox command sub-system
 * @phba: Pointer to HBA context object.
 *
 * This routine flushes the mailbox command subsystem. It will unconditionally
 * flush all the mailbox commands in the three possible stages in the mailbox
 * command sub-system: pending mailbox command queue; the outstanding mailbox
 * command; and completed mailbox command queue. It is caller's responsibility
 * to make sure that the driver is in the proper state to flush the mailbox
 * command sub-system. Namely, the posting of mailbox commands into the
 * pending mailbox command queue from the various clients must be stopped;
 * either the HBA is in a state that it will never works on the outstanding
 * mailbox command (such as in EEH or ERATT conditions) or the outstanding
 * mailbox command has been completed.
 **/
static void
lpfc_sli_mbox_sys_flush(struct lpfc_hba *phba)
{
        LIST_HEAD(completions);
        struct lpfc_sli *psli = &phba->sli;
        LPFC_MBOXQ_t *pmb;
        unsigned long iflag;

        /* Flush all the mailbox commands in the mbox system */
        spin_lock_irqsave(&phba->hbalock, iflag);
        /* The pending mailbox command queue */
        list_splice_init(&phba->sli.mboxq, &completions);
        /* The outstanding active mailbox command */
        if (psli->mbox_active) {
                list_add_tail(&psli->mbox_active->list, &completions);
                psli->mbox_active = NULL;
                psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
        }
        /* The completed mailbox command queue */
        list_splice_init(&phba->sli.mboxq_cmpl, &completions);
        spin_unlock_irqrestore(&phba->hbalock, iflag);

        /* Return all flushed mailbox commands with MBX_NOT_FINISHED status */
        while (!list_empty(&completions)) {
                list_remove_head(&completions, pmb, LPFC_MBOXQ_t, list);
                pmb->u.mb.mbxStatus = MBX_NOT_FINISHED;
                if (pmb->mbox_cmpl)
                        pmb->mbox_cmpl(phba, pmb);
        }
}

/**
 * lpfc_sli_host_down - Vport cleanup function
 * @vport: Pointer to virtual port object.
 *
 * lpfc_sli_host_down is called to clean up the resources
 * associated with a vport before destroying virtual
 * port data structures.
 * This function does following operations:
 * - Free discovery resources associated with this virtual
 *   port.
 * - Free iocbs associated with this virtual port in
 *   the txq.
 * - Send abort for all iocb commands associated with this
 *   vport in txcmplq.
 *
 * This function is called with no lock held and always returns 1.
 **/
int
lpfc_sli_host_down(struct lpfc_vport *vport)
{
        LIST_HEAD(completions);
        struct lpfc_hba *phba = vport->phba;
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_sli_ring *pring;
        struct lpfc_iocbq *iocb, *next_iocb;
        int i;
        unsigned long flags = 0;
        uint16_t prev_pring_flag;

        lpfc_cleanup_discovery_resources(vport);

        spin_lock_irqsave(&phba->hbalock, flags);
        for (i = 0; i < psli->num_rings; i++) {
                pring = &psli->ring[i];
                prev_pring_flag = pring->flag;
                /* Only slow rings */
                if (pring->ringno == LPFC_ELS_RING) {
                        pring->flag |= LPFC_DEFERRED_RING_EVENT;
                        /* Set the lpfc data pending flag */
                        set_bit(LPFC_DATA_READY, &phba->data_flags);
                }
                /*
                 * Error everything on the txq since these iocbs have not been
                 * given to the FW yet.
                 */
                list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
                        if (iocb->vport != vport)
                                continue;
                        list_move_tail(&iocb->list, &completions);
                        pring->txq_cnt--;
                }

                /* Next issue ABTS for everything on the txcmplq */
                list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq,
                                                                        list) {
                        if (iocb->vport != vport)
                                continue;
                        lpfc_sli_issue_abort_iotag(phba, pring, iocb);
                }

                pring->flag = prev_pring_flag;
        }

        spin_unlock_irqrestore(&phba->hbalock, flags);

        /* Cancel all the IOCBs from the completions list */
        lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
                              IOERR_SLI_DOWN);
        return 1;
}

/**
 * lpfc_sli_hba_down - Resource cleanup function for the HBA
 * @phba: Pointer to HBA context object.
 *
 * This function cleans up all iocb, buffers, mailbox commands
 * while shutting down the HBA. This function is called with no
 * lock held and always returns 1.
 * This function does the following to cleanup driver resources:
 * - Free discovery resources for each virtual port
 * - Cleanup any pending fabric iocbs
 * - Iterate through the iocb txq and free each entry
 *   in the list.
 * - Free up any buffer posted to the HBA
 * - Free mailbox commands in the mailbox queue.
 **/
int
lpfc_sli_hba_down(struct lpfc_hba *phba)
{
        LIST_HEAD(completions);
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_sli_ring *pring;
        struct lpfc_dmabuf *buf_ptr;
        unsigned long flags = 0;
        int i;

        /* Shutdown the mailbox command sub-system */
        lpfc_sli_mbox_sys_shutdown(phba);

        lpfc_hba_down_prep(phba);

        lpfc_fabric_abort_hba(phba);

        spin_lock_irqsave(&phba->hbalock, flags);
        for (i = 0; i < psli->num_rings; i++) {
                pring = &psli->ring[i];
                /* Only slow rings */
                if (pring->ringno == LPFC_ELS_RING) {
                        pring->flag |= LPFC_DEFERRED_RING_EVENT;
                        /* Set the lpfc data pending flag */
                        set_bit(LPFC_DATA_READY, &phba->data_flags);
                }

                /*
                 * Error everything on the txq since these iocbs have not been
                 * given to the FW yet.
                 */
                list_splice_init(&pring->txq, &completions);
                pring->txq_cnt = 0;

        }
        spin_unlock_irqrestore(&phba->hbalock, flags);

        /* Cancel all the IOCBs from the completions list */
        lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
                              IOERR_SLI_DOWN);

        spin_lock_irqsave(&phba->hbalock, flags);
        list_splice_init(&phba->elsbuf, &completions);
        phba->elsbuf_cnt = 0;
        phba->elsbuf_prev_cnt = 0;
        spin_unlock_irqrestore(&phba->hbalock, flags);

        while (!list_empty(&completions)) {
                list_remove_head(&completions, buf_ptr,
                        struct lpfc_dmabuf, list);
                lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
                kfree(buf_ptr);
        }

        /* Return any active mbox cmds */
        del_timer_sync(&psli->mbox_tmo);

        spin_lock_irqsave(&phba->pport->work_port_lock, flags);
        phba->pport->work_port_events &= ~WORKER_MBOX_TMO;
        spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);

        return 1;
}

/**
 * lpfc_sli4_hba_down - PCI function resource cleanup for the SLI4 HBA
 * @phba: Pointer to HBA context object.
 *
 * This function cleans up all queues, iocb, buffers, mailbox commands while
 * shutting down the SLI4 HBA FCoE function. This function is called with no
 * lock held and always returns 1.
 *
 * This function does the following to cleanup driver FCoE function resources:
 * - Free discovery resources for each virtual port
 * - Cleanup any pending fabric iocbs
 * - Iterate through the iocb txq and free each entry in the list.
 * - Free up any buffer posted to the HBA.
 * - Clean up all the queue entries: WQ, RQ, MQ, EQ, CQ, etc.
 * - Free mailbox commands in the mailbox queue.
 **/
int
lpfc_sli4_hba_down(struct lpfc_hba *phba)
{
        /* Stop the SLI4 device port */
        lpfc_stop_port(phba);

        /* Tear down the queues in the HBA */
        lpfc_sli4_queue_unset(phba);

        /* unregister default FCFI from the HBA */
        lpfc_sli4_fcfi_unreg(phba, phba->fcf.fcfi);

        return 1;
}

/**
 * lpfc_sli_pcimem_bcopy - SLI memory copy function
 * @srcp: Source memory pointer.
 * @destp: Destination memory pointer.
 * @cnt: Number of words required to be copied.
 *
 * This function is used for copying data between driver memory
 * and the SLI memory. This function also changes the endianness
 * of each word if native endianness is different from SLI
 * endianness. This function can be called with or without
 * lock.
 **/
void
lpfc_sli_pcimem_bcopy(void *srcp, void *destp, uint32_t cnt)
{
        uint32_t *src = srcp;
        uint32_t *dest = destp;
        uint32_t ldata;
        int i;

        for (i = 0; i < (int)cnt; i += sizeof (uint32_t)) {
                ldata = *src;
                ldata = le32_to_cpu(ldata);
                *dest = ldata;
                src++;
                dest++;
        }
}


/**
 * lpfc_sli_bemem_bcopy - SLI memory copy function
 * @srcp: Source memory pointer.
 * @destp: Destination memory pointer.
 * @cnt: Number of words required to be copied.
 *
 * This function is used for copying data between a data structure
 * with big endian representation to local endianness.
 * This function can be called with or without lock.
 **/
void
lpfc_sli_bemem_bcopy(void *srcp, void *destp, uint32_t cnt)
{
        uint32_t *src = srcp;
        uint32_t *dest = destp;
        uint32_t ldata;
        int i;

        for (i = 0; i < (int)cnt; i += sizeof(uint32_t)) {
                ldata = *src;
                ldata = be32_to_cpu(ldata);
                *dest = ldata;
                src++;
                dest++;
        }
}

/**
 * lpfc_sli_ringpostbuf_put - Function to add a buffer to postbufq
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @mp: Pointer to driver buffer object.
 *
 * This function is called with no lock held.
 * It always return zero after adding the buffer to the postbufq
 * buffer list.
 **/
int
lpfc_sli_ringpostbuf_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                         struct lpfc_dmabuf *mp)
{
        /* Stick struct lpfc_dmabuf at end of postbufq so driver can look it up
           later */
        spin_lock_irq(&phba->hbalock);
        list_add_tail(&mp->list, &pring->postbufq);
        pring->postbufq_cnt++;
        spin_unlock_irq(&phba->hbalock);
        return 0;
}

/**
 * lpfc_sli_get_buffer_tag - allocates a tag for a CMD_QUE_XRI64_CX buffer
 * @phba: Pointer to HBA context object.
 *
 * When HBQ is enabled, buffers are searched based on tags. This function
 * allocates a tag for buffer posted using CMD_QUE_XRI64_CX iocb. The
 * tag is bit wise or-ed with QUE_BUFTAG_BIT to make sure that the tag
 * does not conflict with tags of buffer posted for unsolicited events.
 * The function returns the allocated tag. The function is called with
 * no locks held.
 **/
uint32_t
lpfc_sli_get_buffer_tag(struct lpfc_hba *phba)
{
        spin_lock_irq(&phba->hbalock);
        phba->buffer_tag_count++;
        /*
         * Always set the QUE_BUFTAG_BIT to distiguish between
         * a tag assigned by HBQ.
         */
        phba->buffer_tag_count |= QUE_BUFTAG_BIT;
        spin_unlock_irq(&phba->hbalock);
        return phba->buffer_tag_count;
}

/**
 * lpfc_sli_ring_taggedbuf_get - find HBQ buffer associated with given tag
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @tag: Buffer tag.
 *
 * Buffers posted using CMD_QUE_XRI64_CX iocb are in pring->postbufq
 * list. After HBA DMA data to these buffers, CMD_IOCB_RET_XRI64_CX
 * iocb is posted to the response ring with the tag of the buffer.
 * This function searches the pring->postbufq list using the tag
 * to find buffer associated with CMD_IOCB_RET_XRI64_CX
 * iocb. If the buffer is found then lpfc_dmabuf object of the
 * buffer is returned to the caller else NULL is returned.
 * This function is called with no lock held.
 **/
struct lpfc_dmabuf *
lpfc_sli_ring_taggedbuf_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                        uint32_t tag)
{
        struct lpfc_dmabuf *mp, *next_mp;
        struct list_head *slp = &pring->postbufq;

        /* Search postbufq, from the begining, looking for a match on tag */
        spin_lock_irq(&phba->hbalock);
        list_for_each_entry_safe(mp, next_mp, &pring->postbufq, list) {
                if (mp->buffer_tag == tag) {
                        list_del_init(&mp->list);
                        pring->postbufq_cnt--;
                        spin_unlock_irq(&phba->hbalock);
                        return mp;
                }
        }

        spin_unlock_irq(&phba->hbalock);
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0402 Cannot find virtual addr for buffer tag on "
                        "ring %d Data x%lx x%p x%p x%x\n",
                        pring->ringno, (unsigned long) tag,
                        slp->next, slp->prev, pring->postbufq_cnt);

        return NULL;
}

/**
 * lpfc_sli_ringpostbuf_get - search buffers for unsolicited CT and ELS events
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @phys: DMA address of the buffer.
 *
 * This function searches the buffer list using the dma_address
 * of unsolicited event to find the driver's lpfc_dmabuf object
 * corresponding to the dma_address. The function returns the
 * lpfc_dmabuf object if a buffer is found else it returns NULL.
 * This function is called by the ct and els unsolicited event
 * handlers to get the buffer associated with the unsolicited
 * event.
 *
 * This function is called with no lock held.
 **/
struct lpfc_dmabuf *
lpfc_sli_ringpostbuf_get(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                         dma_addr_t phys)
{
        struct lpfc_dmabuf *mp, *next_mp;
        struct list_head *slp = &pring->postbufq;

        /* Search postbufq, from the begining, looking for a match on phys */
        spin_lock_irq(&phba->hbalock);
        list_for_each_entry_safe(mp, next_mp, &pring->postbufq, list) {
                if (mp->phys == phys) {
                        list_del_init(&mp->list);
                        pring->postbufq_cnt--;
                        spin_unlock_irq(&phba->hbalock);
                        return mp;
                }
        }

        spin_unlock_irq(&phba->hbalock);
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0410 Cannot find virtual addr for mapped buf on "
                        "ring %d Data x%llx x%p x%p x%x\n",
                        pring->ringno, (unsigned long long)phys,
                        slp->next, slp->prev, pring->postbufq_cnt);
        return NULL;
}

/**
 * lpfc_sli_abort_els_cmpl - Completion handler for the els abort iocbs
 * @phba: Pointer to HBA context object.
 * @cmdiocb: Pointer to driver command iocb object.
 * @rspiocb: Pointer to driver response iocb object.
 *
 * This function is the completion handler for the abort iocbs for
 * ELS commands. This function is called from the ELS ring event
 * handler with no lock held. This function frees memory resources
 * associated with the abort iocb.
 **/
static void
lpfc_sli_abort_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
                        struct lpfc_iocbq *rspiocb)
{
        IOCB_t *irsp = &rspiocb->iocb;
        uint16_t abort_iotag, abort_context;
        struct lpfc_iocbq *abort_iocb;
        struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];

        abort_iocb = NULL;

        if (irsp->ulpStatus) {
                abort_context = cmdiocb->iocb.un.acxri.abortContextTag;
                abort_iotag = cmdiocb->iocb.un.acxri.abortIoTag;

                spin_lock_irq(&phba->hbalock);
                if (phba->sli_rev < LPFC_SLI_REV4) {
                        if (abort_iotag != 0 &&
                                abort_iotag <= phba->sli.last_iotag)
                                abort_iocb =
                                        phba->sli.iocbq_lookup[abort_iotag];
                } else
                        /* For sli4 the abort_tag is the XRI,
                         * so the abort routine puts the iotag  of the iocb
                         * being aborted in the context field of the abort
                         * IOCB.
                         */
                        abort_iocb = phba->sli.iocbq_lookup[abort_context];

                lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_SLI,
                                "0327 Cannot abort els iocb %p "
                                "with tag %x context %x, abort status %x, "
                                "abort code %x\n",
                                abort_iocb, abort_iotag, abort_context,
                                irsp->ulpStatus, irsp->un.ulpWord[4]);

                /*
                 *  If the iocb is not found in Firmware queue the iocb
                 *  might have completed already. Do not free it again.
                 */
                if (irsp->ulpStatus == IOSTAT_LOCAL_REJECT) {
                        if (irsp->un.ulpWord[4] != IOERR_NO_XRI) {
                                spin_unlock_irq(&phba->hbalock);
                                lpfc_sli_release_iocbq(phba, cmdiocb);
                                return;
                        }
                        /* For SLI4 the ulpContext field for abort IOCB
                         * holds the iotag of the IOCB being aborted so
                         * the local abort_context needs to be reset to
                         * match the aborted IOCBs ulpContext.
                         */
                        if (abort_iocb && phba->sli_rev == LPFC_SLI_REV4)
                                abort_context = abort_iocb->iocb.ulpContext;
                }
                /*
                 * make sure we have the right iocbq before taking it
                 * off the txcmplq and try to call completion routine.
                 */
                if (!abort_iocb ||
                    abort_iocb->iocb.ulpContext != abort_context ||
                    (abort_iocb->iocb_flag & LPFC_DRIVER_ABORTED) == 0)
                        spin_unlock_irq(&phba->hbalock);
                else if (phba->sli_rev < LPFC_SLI_REV4) {
                        /*
                         * leave the SLI4 aborted command on the txcmplq
                         * list and the command complete WCQE's XB bit
                         * will tell whether the SGL (XRI) can be released
                         * immediately or to the aborted SGL list for the
                         * following abort XRI from the HBA.
                         */
                        list_del_init(&abort_iocb->list);
                        pring->txcmplq_cnt--;
                        spin_unlock_irq(&phba->hbalock);

                        /* Firmware could still be in progress of DMAing
                         * payload, so don't free data buffer till after
                         * a hbeat.
                         */
                        spin_lock_irq(&phba->hbalock);
                        abort_iocb->iocb_flag |= LPFC_DELAY_MEM_FREE;
                        abort_iocb->iocb_flag &= ~LPFC_DRIVER_ABORTED;
                        spin_unlock_irq(&phba->hbalock);

                        abort_iocb->iocb.ulpStatus = IOSTAT_LOCAL_REJECT;
                        abort_iocb->iocb.un.ulpWord[4] = IOERR_ABORT_REQUESTED;
                        (abort_iocb->iocb_cmpl)(phba, abort_iocb, abort_iocb);
                }
        }

        lpfc_sli_release_iocbq(phba, cmdiocb);
        return;
}

/**
 * lpfc_ignore_els_cmpl - Completion handler for aborted ELS command
 * @phba: Pointer to HBA context object.
 * @cmdiocb: Pointer to driver command iocb object.
 * @rspiocb: Pointer to driver response iocb object.
 *
 * The function is called from SLI ring event handler with no
 * lock held. This function is the completion handler for ELS commands
 * which are aborted. The function frees memory resources used for
 * the aborted ELS commands.
 **/
static void
lpfc_ignore_els_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
                     struct lpfc_iocbq *rspiocb)
{
        IOCB_t *irsp = &rspiocb->iocb;

        /* ELS cmd tag <ulpIoTag> completes */
        lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
                        "0139 Ignoring ELS cmd tag x%x completion Data: "
                        "x%x x%x x%x\n",
                        irsp->ulpIoTag, irsp->ulpStatus,
                        irsp->un.ulpWord[4], irsp->ulpTimeout);
        if (cmdiocb->iocb.ulpCommand == CMD_GEN_REQUEST64_CR)
                lpfc_ct_free_iocb(phba, cmdiocb);
        else
                lpfc_els_free_iocb(phba, cmdiocb);
        return;
}

/**
 * lpfc_sli_issue_abort_iotag - Abort function for a command iocb
 * @phba: Pointer to HBA context object.
 * @pring: Pointer to driver SLI ring object.
 * @cmdiocb: Pointer to driver command iocb object.
 *
 * This function issues an abort iocb for the provided command
 * iocb. This function is called with hbalock held.
 * The function returns 0 when it fails due to memory allocation
 * failure or when the command iocb is an abort request.
 **/
int
lpfc_sli_issue_abort_iotag(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                           struct lpfc_iocbq *cmdiocb)
{
        struct lpfc_vport *vport = cmdiocb->vport;
        struct lpfc_iocbq *abtsiocbp;
        IOCB_t *icmd = NULL;
        IOCB_t *iabt = NULL;
        int retval = IOCB_ERROR;

        /*
         * There are certain command types we don't want to abort.  And we
         * don't want to abort commands that are already in the process of
         * being aborted.
         */
        icmd = &cmdiocb->iocb;
        if (icmd->ulpCommand == CMD_ABORT_XRI_CN ||
            icmd->ulpCommand == CMD_CLOSE_XRI_CN ||
            (cmdiocb->iocb_flag & LPFC_DRIVER_ABORTED) != 0)
                return 0;

        /* If we're unloading, don't abort iocb on the ELS ring, but change the
         * callback so that nothing happens when it finishes.
         */
        if ((vport->load_flag & FC_UNLOADING) &&
            (pring->ringno == LPFC_ELS_RING)) {
                if (cmdiocb->iocb_flag & LPFC_IO_FABRIC)
                        cmdiocb->fabric_iocb_cmpl = lpfc_ignore_els_cmpl;
                else
                        cmdiocb->iocb_cmpl = lpfc_ignore_els_cmpl;
                goto abort_iotag_exit;
        }

        /* issue ABTS for this IOCB based on iotag */
        abtsiocbp = __lpfc_sli_get_iocbq(phba);
        if (abtsiocbp == NULL)
                return 0;

        /* This signals the response to set the correct status
         * before calling the completion handler
         */
        cmdiocb->iocb_flag |= LPFC_DRIVER_ABORTED;

        iabt = &abtsiocbp->iocb;
        iabt->un.acxri.abortType = ABORT_TYPE_ABTS;
        iabt->un.acxri.abortContextTag = icmd->ulpContext;
        if (phba->sli_rev == LPFC_SLI_REV4) {
                iabt->un.acxri.abortIoTag = cmdiocb->sli4_xritag;
                iabt->un.acxri.abortContextTag = cmdiocb->iotag;
        }
        else
                iabt->un.acxri.abortIoTag = icmd->ulpIoTag;
        iabt->ulpLe = 1;
        iabt->ulpClass = icmd->ulpClass;

        /* ABTS WQE must go to the same WQ as the WQE to be aborted */
        abtsiocbp->fcp_wqidx = cmdiocb->fcp_wqidx;
        if (cmdiocb->iocb_flag & LPFC_IO_FCP)
                abtsiocbp->iocb_flag |= LPFC_USE_FCPWQIDX;

        if (phba->link_state >= LPFC_LINK_UP)
                iabt->ulpCommand = CMD_ABORT_XRI_CN;
        else
                iabt->ulpCommand = CMD_CLOSE_XRI_CN;

        abtsiocbp->iocb_cmpl = lpfc_sli_abort_els_cmpl;

        lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI,
                         "0339 Abort xri x%x, original iotag x%x, "
                         "abort cmd iotag x%x\n",
                         iabt->un.acxri.abortContextTag,
                         iabt->un.acxri.abortIoTag, abtsiocbp->iotag);
        retval = __lpfc_sli_issue_iocb(phba, pring->ringno, abtsiocbp, 0);

        if (retval)
                __lpfc_sli_release_iocbq(phba, abtsiocbp);
abort_iotag_exit:
        /*
         * Caller to this routine should check for IOCB_ERROR
         * and handle it properly.  This routine no longer removes
         * iocb off txcmplq and call compl in case of IOCB_ERROR.
         */
        return retval;
}

/**
 * lpfc_sli_validate_fcp_iocb - find commands associated with a vport or LUN
 * @iocbq: Pointer to driver iocb object.
 * @vport: Pointer to driver virtual port object.
 * @tgt_id: SCSI ID of the target.
 * @lun_id: LUN ID of the scsi device.
 * @ctx_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST
 *
 * This function acts as an iocb filter for functions which abort or count
 * all FCP iocbs pending on a lun/SCSI target/SCSI host. It will return
 * 0 if the filtering criteria is met for the given iocb and will return
 * 1 if the filtering criteria is not met.
 * If ctx_cmd == LPFC_CTX_LUN, the function returns 0 only if the
 * given iocb is for the SCSI device specified by vport, tgt_id and
 * lun_id parameter.
 * If ctx_cmd == LPFC_CTX_TGT,  the function returns 0 only if the
 * given iocb is for the SCSI target specified by vport and tgt_id
 * parameters.
 * If ctx_cmd == LPFC_CTX_HOST, the function returns 0 only if the
 * given iocb is for the SCSI host associated with the given vport.
 * This function is called with no locks held.
 **/
static int
lpfc_sli_validate_fcp_iocb(struct lpfc_iocbq *iocbq, struct lpfc_vport *vport,
                           uint16_t tgt_id, uint64_t lun_id,
                           lpfc_ctx_cmd ctx_cmd)
{
        struct lpfc_scsi_buf *lpfc_cmd;
        int rc = 1;

        if (!(iocbq->iocb_flag &  LPFC_IO_FCP))
                return rc;

        if (iocbq->vport != vport)
                return rc;

        lpfc_cmd = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);

        if (lpfc_cmd->pCmd == NULL)
                return rc;

        switch (ctx_cmd) {
        case LPFC_CTX_LUN:
                if ((lpfc_cmd->rdata->pnode) &&
                    (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id) &&
                    (scsilun_to_int(&lpfc_cmd->fcp_cmnd->fcp_lun) == lun_id))
                        rc = 0;
                break;
        case LPFC_CTX_TGT:
                if ((lpfc_cmd->rdata->pnode) &&
                    (lpfc_cmd->rdata->pnode->nlp_sid == tgt_id))
                        rc = 0;
                break;
        case LPFC_CTX_HOST:
                rc = 0;
                break;
        default:
                printk(KERN_ERR "%s: Unknown context cmd type, value %d\n",
                        __func__, ctx_cmd);
                break;
        }

        return rc;
}

/**
 * lpfc_sli_sum_iocb - Function to count the number of FCP iocbs pending
 * @vport: Pointer to virtual port.
 * @tgt_id: SCSI ID of the target.
 * @lun_id: LUN ID of the scsi device.
 * @ctx_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST.
 *
 * This function returns number of FCP commands pending for the vport.
 * When ctx_cmd == LPFC_CTX_LUN, the function returns number of FCP
 * commands pending on the vport associated with SCSI device specified
 * by tgt_id and lun_id parameters.
 * When ctx_cmd == LPFC_CTX_TGT, the function returns number of FCP
 * commands pending on the vport associated with SCSI target specified
 * by tgt_id parameter.
 * When ctx_cmd == LPFC_CTX_HOST, the function returns number of FCP
 * commands pending on the vport.
 * This function returns the number of iocbs which satisfy the filter.
 * This function is called without any lock held.
 **/
int
lpfc_sli_sum_iocb(struct lpfc_vport *vport, uint16_t tgt_id, uint64_t lun_id,
                  lpfc_ctx_cmd ctx_cmd)
{
        struct lpfc_hba *phba = vport->phba;
        struct lpfc_iocbq *iocbq;
        int sum, i;

        for (i = 1, sum = 0; i <= phba->sli.last_iotag; i++) {
                iocbq = phba->sli.iocbq_lookup[i];

                if (lpfc_sli_validate_fcp_iocb (iocbq, vport, tgt_id, lun_id,
                                                ctx_cmd) == 0)
                        sum++;
        }

        return sum;
}

/**
 * lpfc_sli_abort_fcp_cmpl - Completion handler function for aborted FCP IOCBs
 * @phba: Pointer to HBA context object
 * @cmdiocb: Pointer to command iocb object.
 * @rspiocb: Pointer to response iocb object.
 *
 * This function is called when an aborted FCP iocb completes. This
 * function is called by the ring event handler with no lock held.
 * This function frees the iocb.
 **/
void
lpfc_sli_abort_fcp_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
                        struct lpfc_iocbq *rspiocb)
{
        lpfc_sli_release_iocbq(phba, cmdiocb);
        return;
}

/**
 * lpfc_sli_abort_iocb - issue abort for all commands on a host/target/LUN
 * @vport: Pointer to virtual port.
 * @pring: Pointer to driver SLI ring object.
 * @tgt_id: SCSI ID of the target.
 * @lun_id: LUN ID of the scsi device.
 * @abort_cmd: LPFC_CTX_LUN/LPFC_CTX_TGT/LPFC_CTX_HOST.
 *
 * This function sends an abort command for every SCSI command
 * associated with the given virtual port pending on the ring
 * filtered by lpfc_sli_validate_fcp_iocb function.
 * When abort_cmd == LPFC_CTX_LUN, the function sends abort only to the
 * FCP iocbs associated with lun specified by tgt_id and lun_id
 * parameters
 * When abort_cmd == LPFC_CTX_TGT, the function sends abort only to the
 * FCP iocbs associated with SCSI target specified by tgt_id parameter.
 * When abort_cmd == LPFC_CTX_HOST, the function sends abort to all
 * FCP iocbs associated with virtual port.
 * This function returns number of iocbs it failed to abort.
 * This function is called with no locks held.
 **/
int
lpfc_sli_abort_iocb(struct lpfc_vport *vport, struct lpfc_sli_ring *pring,
                    uint16_t tgt_id, uint64_t lun_id, lpfc_ctx_cmd abort_cmd)
{
        struct lpfc_hba *phba = vport->phba;
        struct lpfc_iocbq *iocbq;
        struct lpfc_iocbq *abtsiocb;
        IOCB_t *cmd = NULL;
        int errcnt = 0, ret_val = 0;
        int i;

        for (i = 1; i <= phba->sli.last_iotag; i++) {
                iocbq = phba->sli.iocbq_lookup[i];

                if (lpfc_sli_validate_fcp_iocb(iocbq, vport, tgt_id, lun_id,
                                               abort_cmd) != 0)
                        continue;

                /* issue ABTS for this IOCB based on iotag */
                abtsiocb = lpfc_sli_get_iocbq(phba);
                if (abtsiocb == NULL) {
                        errcnt++;
                        continue;
                }

                cmd = &iocbq->iocb;
                abtsiocb->iocb.un.acxri.abortType = ABORT_TYPE_ABTS;
                abtsiocb->iocb.un.acxri.abortContextTag = cmd->ulpContext;
                if (phba->sli_rev == LPFC_SLI_REV4)
                        abtsiocb->iocb.un.acxri.abortIoTag = iocbq->sli4_xritag;
                else
                        abtsiocb->iocb.un.acxri.abortIoTag = cmd->ulpIoTag;
                abtsiocb->iocb.ulpLe = 1;
                abtsiocb->iocb.ulpClass = cmd->ulpClass;
                abtsiocb->vport = phba->pport;

                /* ABTS WQE must go to the same WQ as the WQE to be aborted */
                abtsiocb->fcp_wqidx = iocbq->fcp_wqidx;
                if (iocbq->iocb_flag & LPFC_IO_FCP)
                        abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;

                if (lpfc_is_link_up(phba))
                        abtsiocb->iocb.ulpCommand = CMD_ABORT_XRI_CN;
                else
                        abtsiocb->iocb.ulpCommand = CMD_CLOSE_XRI_CN;

                /* Setup callback routine and issue the command. */
                abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
                ret_val = lpfc_sli_issue_iocb(phba, pring->ringno,
                                              abtsiocb, 0);
                if (ret_val == IOCB_ERROR) {
                        lpfc_sli_release_iocbq(phba, abtsiocb);
                        errcnt++;
                        continue;
                }
        }

        return errcnt;
}

/**
 * lpfc_sli_wake_iocb_wait - lpfc_sli_issue_iocb_wait's completion handler
 * @phba: Pointer to HBA context object.
 * @cmdiocbq: Pointer to command iocb.
 * @rspiocbq: Pointer to response iocb.
 *
 * This function is the completion handler for iocbs issued using
 * lpfc_sli_issue_iocb_wait function. This function is called by the
 * ring event handler function without any lock held. This function
 * can be called from both worker thread context and interrupt
 * context. This function also can be called from other thread which
 * cleans up the SLI layer objects.
 * This function copy the contents of the response iocb to the
 * response iocb memory object provided by the caller of
 * lpfc_sli_issue_iocb_wait and then wakes up the thread which
 * sleeps for the iocb completion.
 **/
static void
lpfc_sli_wake_iocb_wait(struct lpfc_hba *phba,
                        struct lpfc_iocbq *cmdiocbq,
                        struct lpfc_iocbq *rspiocbq)
{
        wait_queue_head_t *pdone_q;
        unsigned long iflags;

        spin_lock_irqsave(&phba->hbalock, iflags);
        cmdiocbq->iocb_flag |= LPFC_IO_WAKE;
        if (cmdiocbq->context2 && rspiocbq)
                memcpy(&((struct lpfc_iocbq *)cmdiocbq->context2)->iocb,
                       &rspiocbq->iocb, sizeof(IOCB_t));

        pdone_q = cmdiocbq->context_un.wait_queue;
        if (pdone_q)
                wake_up(pdone_q);
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        return;
}

/**
 * lpfc_chk_iocb_flg - Test IOCB flag with lock held.
 * @phba: Pointer to HBA context object..
 * @piocbq: Pointer to command iocb.
 * @flag: Flag to test.
 *
 * This routine grabs the hbalock and then test the iocb_flag to
 * see if the passed in flag is set.
 * Returns:
 * 1 if flag is set.
 * 0 if flag is not set.
 **/
static int
lpfc_chk_iocb_flg(struct lpfc_hba *phba,
                 struct lpfc_iocbq *piocbq, uint32_t flag)
{
        unsigned long iflags;
        int ret;

        spin_lock_irqsave(&phba->hbalock, iflags);
        ret = piocbq->iocb_flag & flag;
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        return ret;

}

/**
 * lpfc_sli_issue_iocb_wait - Synchronous function to issue iocb commands
 * @phba: Pointer to HBA context object..
 * @pring: Pointer to sli ring.
 * @piocb: Pointer to command iocb.
 * @prspiocbq: Pointer to response iocb.
 * @timeout: Timeout in number of seconds.
 *
 * This function issues the iocb to firmware and waits for the
 * iocb to complete. If the iocb command is not
 * completed within timeout seconds, it returns IOCB_TIMEDOUT.
 * Caller should not free the iocb resources if this function
 * returns IOCB_TIMEDOUT.
 * The function waits for the iocb completion using an
 * non-interruptible wait.
 * This function will sleep while waiting for iocb completion.
 * So, this function should not be called from any context which
 * does not allow sleeping. Due to the same reason, this function
 * cannot be called with interrupt disabled.
 * This function assumes that the iocb completions occur while
 * this function sleep. So, this function cannot be called from
 * the thread which process iocb completion for this ring.
 * This function clears the iocb_flag of the iocb object before
 * issuing the iocb and the iocb completion handler sets this
 * flag and wakes this thread when the iocb completes.
 * The contents of the response iocb will be copied to prspiocbq
 * by the completion handler when the command completes.
 * This function returns IOCB_SUCCESS when success.
 * This function is called with no lock held.
 **/
int
lpfc_sli_issue_iocb_wait(struct lpfc_hba *phba,
                         uint32_t ring_number,
                         struct lpfc_iocbq *piocb,
                         struct lpfc_iocbq *prspiocbq,
                         uint32_t timeout)
{
        DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_q);
        long timeleft, timeout_req = 0;
        int retval = IOCB_SUCCESS;
        uint32_t creg_val;

        /*
         * If the caller has provided a response iocbq buffer, then context2
         * is NULL or its an error.
         */
        if (prspiocbq) {
                if (piocb->context2)
                        return IOCB_ERROR;
                piocb->context2 = prspiocbq;
        }

        piocb->iocb_cmpl = lpfc_sli_wake_iocb_wait;
        piocb->context_un.wait_queue = &done_q;
        piocb->iocb_flag &= ~LPFC_IO_WAKE;

        if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
                creg_val = readl(phba->HCregaddr);
                creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
                writel(creg_val, phba->HCregaddr);
                readl(phba->HCregaddr); /* flush */
        }

        retval = lpfc_sli_issue_iocb(phba, ring_number, piocb, 0);
        if (retval == IOCB_SUCCESS) {
                timeout_req = timeout * HZ;
                timeleft = wait_event_timeout(done_q,
                                lpfc_chk_iocb_flg(phba, piocb, LPFC_IO_WAKE),
                                timeout_req);

                if (piocb->iocb_flag & LPFC_IO_WAKE) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                                        "0331 IOCB wake signaled\n");
                } else if (timeleft == 0) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                        "0338 IOCB wait timeout error - no "
                                        "wake response Data x%x\n", timeout);
                        retval = IOCB_TIMEDOUT;
                } else {
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                        "0330 IOCB wake NOT set, "
                                        "Data x%x x%lx\n",
                                        timeout, (timeleft / jiffies));
                        retval = IOCB_TIMEDOUT;
                }
        } else {
                lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                                "0332 IOCB wait issue failed, Data x%x\n",
                                retval);
                retval = IOCB_ERROR;
        }

        if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
                creg_val = readl(phba->HCregaddr);
                creg_val &= ~(HC_R0INT_ENA << LPFC_FCP_RING);
                writel(creg_val, phba->HCregaddr);
                readl(phba->HCregaddr); /* flush */
        }

        if (prspiocbq)
                piocb->context2 = NULL;

        piocb->context_un.wait_queue = NULL;
        piocb->iocb_cmpl = NULL;
        return retval;
}

/**
 * lpfc_sli_issue_mbox_wait - Synchronous function to issue mailbox
 * @phba: Pointer to HBA context object.
 * @pmboxq: Pointer to driver mailbox object.
 * @timeout: Timeout in number of seconds.
 *
 * This function issues the mailbox to firmware and waits for the
 * mailbox command to complete. If the mailbox command is not
 * completed within timeout seconds, it returns MBX_TIMEOUT.
 * The function waits for the mailbox completion using an
 * interruptible wait. If the thread is woken up due to a
 * signal, MBX_TIMEOUT error is returned to the caller. Caller
 * should not free the mailbox resources, if this function returns
 * MBX_TIMEOUT.
 * This function will sleep while waiting for mailbox completion.
 * So, this function should not be called from any context which
 * does not allow sleeping. Due to the same reason, this function
 * cannot be called with interrupt disabled.
 * This function assumes that the mailbox completion occurs while
 * this function sleep. So, this function cannot be called from
 * the worker thread which processes mailbox completion.
 * This function is called in the context of HBA management
 * applications.
 * This function returns MBX_SUCCESS when successful.
 * This function is called with no lock held.
 **/
int
lpfc_sli_issue_mbox_wait(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq,
                         uint32_t timeout)
{
        DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_q);
        int retval;
        unsigned long flag;

        /* The caller must leave context1 empty. */
        if (pmboxq->context1)
                return MBX_NOT_FINISHED;

        pmboxq->mbox_flag &= ~LPFC_MBX_WAKE;
        /* setup wake call as IOCB callback */
        pmboxq->mbox_cmpl = lpfc_sli_wake_mbox_wait;
        /* setup context field to pass wait_queue pointer to wake function  */
        pmboxq->context1 = &done_q;

        /* now issue the command */
        retval = lpfc_sli_issue_mbox(phba, pmboxq, MBX_NOWAIT);

        if (retval == MBX_BUSY || retval == MBX_SUCCESS) {
                wait_event_interruptible_timeout(done_q,
                                pmboxq->mbox_flag & LPFC_MBX_WAKE,
                                timeout * HZ);

                spin_lock_irqsave(&phba->hbalock, flag);
                pmboxq->context1 = NULL;
                /*
                 * if LPFC_MBX_WAKE flag is set the mailbox is completed
                 * else do not free the resources.
                 */
                if (pmboxq->mbox_flag & LPFC_MBX_WAKE)
                        retval = MBX_SUCCESS;
                else {
                        retval = MBX_TIMEOUT;
                        pmboxq->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
                }
                spin_unlock_irqrestore(&phba->hbalock, flag);
        }

        return retval;
}

/**
 * lpfc_sli_mbox_sys_shutdown - shutdown mailbox command sub-system
 * @phba: Pointer to HBA context.
 *
 * This function is called to shutdown the driver's mailbox sub-system.
 * It first marks the mailbox sub-system is in a block state to prevent
 * the asynchronous mailbox command from issued off the pending mailbox
 * command queue. If the mailbox command sub-system shutdown is due to
 * HBA error conditions such as EEH or ERATT, this routine shall invoke
 * the mailbox sub-system flush routine to forcefully bring down the
 * mailbox sub-system. Otherwise, if it is due to normal condition (such
 * as with offline or HBA function reset), this routine will wait for the
 * outstanding mailbox command to complete before invoking the mailbox
 * sub-system flush routine to gracefully bring down mailbox sub-system.
 **/
void
lpfc_sli_mbox_sys_shutdown(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;
        uint8_t actcmd = MBX_HEARTBEAT;
        unsigned long timeout;

        spin_lock_irq(&phba->hbalock);
        psli->sli_flag |= LPFC_SLI_ASYNC_MBX_BLK;
        spin_unlock_irq(&phba->hbalock);

        if (psli->sli_flag & LPFC_SLI_ACTIVE) {
                spin_lock_irq(&phba->hbalock);
                if (phba->sli.mbox_active)
                        actcmd = phba->sli.mbox_active->u.mb.mbxCommand;
                spin_unlock_irq(&phba->hbalock);
                /* Determine how long we might wait for the active mailbox
                 * command to be gracefully completed by firmware.
                 */
                timeout = msecs_to_jiffies(lpfc_mbox_tmo_val(phba, actcmd) *
                                           1000) + jiffies;
                while (phba->sli.mbox_active) {
                        /* Check active mailbox complete status every 2ms */
                        msleep(2);
                        if (time_after(jiffies, timeout))
                                /* Timeout, let the mailbox flush routine to
                                 * forcefully release active mailbox command
                                 */
                                break;
                }
        }
        lpfc_sli_mbox_sys_flush(phba);
}

/**
 * lpfc_sli_eratt_read - read sli-3 error attention events
 * @phba: Pointer to HBA context.
 *
 * This function is called to read the SLI3 device error attention registers
 * for possible error attention events. The caller must hold the hostlock
 * with spin_lock_irq().
 *
 * This fucntion returns 1 when there is Error Attention in the Host Attention
 * Register and returns 0 otherwise.
 **/
static int
lpfc_sli_eratt_read(struct lpfc_hba *phba)
{
        uint32_t ha_copy;

        /* Read chip Host Attention (HA) register */
        ha_copy = readl(phba->HAregaddr);
        if (ha_copy & HA_ERATT) {
                /* Read host status register to retrieve error event */
                lpfc_sli_read_hs(phba);

                /* Check if there is a deferred error condition is active */
                if ((HS_FFER1 & phba->work_hs) &&
                    ((HS_FFER2 | HS_FFER3 | HS_FFER4 | HS_FFER5 |
                     HS_FFER6 | HS_FFER7) & phba->work_hs)) {
                        phba->hba_flag |= DEFER_ERATT;
                        /* Clear all interrupt enable conditions */
                        writel(0, phba->HCregaddr);
                        readl(phba->HCregaddr);
                }

                /* Set the driver HA work bitmap */
                phba->work_ha |= HA_ERATT;
                /* Indicate polling handles this ERATT */
                phba->hba_flag |= HBA_ERATT_HANDLED;
                return 1;
        }
        return 0;
}

/**
 * lpfc_sli4_eratt_read - read sli-4 error attention events
 * @phba: Pointer to HBA context.
 *
 * This function is called to read the SLI4 device error attention registers
 * for possible error attention events. The caller must hold the hostlock
 * with spin_lock_irq().
 *
 * This fucntion returns 1 when there is Error Attention in the Host Attention
 * Register and returns 0 otherwise.
 **/
static int
lpfc_sli4_eratt_read(struct lpfc_hba *phba)
{
        uint32_t uerr_sta_hi, uerr_sta_lo;

        /* For now, use the SLI4 device internal unrecoverable error
         * registers for error attention. This can be changed later.
         */
        uerr_sta_lo = readl(phba->sli4_hba.UERRLOregaddr);
        uerr_sta_hi = readl(phba->sli4_hba.UERRHIregaddr);
        if ((~phba->sli4_hba.ue_mask_lo & uerr_sta_lo) ||
            (~phba->sli4_hba.ue_mask_hi & uerr_sta_hi)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1423 HBA Unrecoverable error: "
                                "uerr_lo_reg=0x%x, uerr_hi_reg=0x%x, "
                                "ue_mask_lo_reg=0x%x, ue_mask_hi_reg=0x%x\n",
                                uerr_sta_lo, uerr_sta_hi,
                                phba->sli4_hba.ue_mask_lo,
                                phba->sli4_hba.ue_mask_hi);
                phba->work_status[0] = uerr_sta_lo;
                phba->work_status[1] = uerr_sta_hi;
                /* Set the driver HA work bitmap */
                phba->work_ha |= HA_ERATT;
                /* Indicate polling handles this ERATT */
                phba->hba_flag |= HBA_ERATT_HANDLED;
                return 1;
        }
        return 0;
}

/**
 * lpfc_sli_check_eratt - check error attention events
 * @phba: Pointer to HBA context.
 *
 * This function is called from timer soft interrupt context to check HBA's
 * error attention register bit for error attention events.
 *
 * This fucntion returns 1 when there is Error Attention in the Host Attention
 * Register and returns 0 otherwise.
 **/
int
lpfc_sli_check_eratt(struct lpfc_hba *phba)
{
        uint32_t ha_copy;

        /* If somebody is waiting to handle an eratt, don't process it
         * here. The brdkill function will do this.
         */
        if (phba->link_flag & LS_IGNORE_ERATT)
                return 0;

        /* Check if interrupt handler handles this ERATT */
        spin_lock_irq(&phba->hbalock);
        if (phba->hba_flag & HBA_ERATT_HANDLED) {
                /* Interrupt handler has handled ERATT */
                spin_unlock_irq(&phba->hbalock);
                return 0;
        }

        /*
         * If there is deferred error attention, do not check for error
         * attention
         */
        if (unlikely(phba->hba_flag & DEFER_ERATT)) {
                spin_unlock_irq(&phba->hbalock);
                return 0;
        }

        /* If PCI channel is offline, don't process it */
        if (unlikely(pci_channel_offline(phba->pcidev))) {
                spin_unlock_irq(&phba->hbalock);
                return 0;
        }

        switch (phba->sli_rev) {
        case LPFC_SLI_REV2:
        case LPFC_SLI_REV3:
                /* Read chip Host Attention (HA) register */
                ha_copy = lpfc_sli_eratt_read(phba);
                break;
        case LPFC_SLI_REV4:
                /* Read devcie Uncoverable Error (UERR) registers */
                ha_copy = lpfc_sli4_eratt_read(phba);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0299 Invalid SLI revision (%d)\n",
                                phba->sli_rev);
                ha_copy = 0;
                break;
        }
        spin_unlock_irq(&phba->hbalock);

        return ha_copy;
}

/**
 * lpfc_intr_state_check - Check device state for interrupt handling
 * @phba: Pointer to HBA context.
 *
 * This inline routine checks whether a device or its PCI slot is in a state
 * that the interrupt should be handled.
 *
 * This function returns 0 if the device or the PCI slot is in a state that
 * interrupt should be handled, otherwise -EIO.
 */
static inline int
lpfc_intr_state_check(struct lpfc_hba *phba)
{
        /* If the pci channel is offline, ignore all the interrupts */
        if (unlikely(pci_channel_offline(phba->pcidev)))
                return -EIO;

        /* Update device level interrupt statistics */
        phba->sli.slistat.sli_intr++;

        /* Ignore all interrupts during initialization. */
        if (unlikely(phba->link_state < LPFC_LINK_DOWN))
                return -EIO;

        return 0;
}

/**
 * lpfc_sli_sp_intr_handler - Slow-path interrupt handler to SLI-3 device
 * @irq: Interrupt number.
 * @dev_id: The device context pointer.
 *
 * This function is directly called from the PCI layer as an interrupt
 * service routine when device with SLI-3 interface spec is enabled with
 * MSI-X multi-message interrupt mode and there are slow-path events in
 * the HBA. However, when the device is enabled with either MSI or Pin-IRQ
 * interrupt mode, this function is called as part of the device-level
 * interrupt handler. When the PCI slot is in error recovery or the HBA
 * is undergoing initialization, the interrupt handler will not process
 * the interrupt. The link attention and ELS ring attention events are
 * handled by the worker thread. The interrupt handler signals the worker
 * thread and returns for these events. This function is called without
 * any lock held. It gets the hbalock to access and update SLI data
 * structures.
 *
 * This function returns IRQ_HANDLED when interrupt is handled else it
 * returns IRQ_NONE.
 **/
irqreturn_t
lpfc_sli_sp_intr_handler(int irq, void *dev_id)
{
        struct lpfc_hba  *phba;
        uint32_t ha_copy, hc_copy;
        uint32_t work_ha_copy;
        unsigned long status;
        unsigned long iflag;
        uint32_t control;

        MAILBOX_t *mbox, *pmbox;
        struct lpfc_vport *vport;
        struct lpfc_nodelist *ndlp;
        struct lpfc_dmabuf *mp;
        LPFC_MBOXQ_t *pmb;
        int rc;

        /*
         * Get the driver's phba structure from the dev_id and
         * assume the HBA is not interrupting.
         */
        phba = (struct lpfc_hba *)dev_id;

        if (unlikely(!phba))
                return IRQ_NONE;

        /*
         * Stuff needs to be attented to when this function is invoked as an
         * individual interrupt handler in MSI-X multi-message interrupt mode
         */
        if (phba->intr_type == MSIX) {
                /* Check device state for handling interrupt */
                if (lpfc_intr_state_check(phba))
                        return IRQ_NONE;
                /* Need to read HA REG for slow-path events */
                spin_lock_irqsave(&phba->hbalock, iflag);
                ha_copy = readl(phba->HAregaddr);
                /* If somebody is waiting to handle an eratt don't process it
                 * here. The brdkill function will do this.
                 */
                if (phba->link_flag & LS_IGNORE_ERATT)
                        ha_copy &= ~HA_ERATT;
                /* Check the need for handling ERATT in interrupt handler */
                if (ha_copy & HA_ERATT) {
                        if (phba->hba_flag & HBA_ERATT_HANDLED)
                                /* ERATT polling has handled ERATT */
                                ha_copy &= ~HA_ERATT;
                        else
                                /* Indicate interrupt handler handles ERATT */
                                phba->hba_flag |= HBA_ERATT_HANDLED;
                }

                /*
                 * If there is deferred error attention, do not check for any
                 * interrupt.
                 */
                if (unlikely(phba->hba_flag & DEFER_ERATT)) {
                        spin_unlock_irqrestore(&phba->hbalock, iflag);
                        return IRQ_NONE;
                }

                /* Clear up only attention source related to slow-path */
                hc_copy = readl(phba->HCregaddr);
                writel(hc_copy & ~(HC_MBINT_ENA | HC_R2INT_ENA |
                        HC_LAINT_ENA | HC_ERINT_ENA),
                        phba->HCregaddr);
                writel((ha_copy & (HA_MBATT | HA_R2_CLR_MSK)),
                        phba->HAregaddr);
                writel(hc_copy, phba->HCregaddr);
                readl(phba->HAregaddr); /* flush */
                spin_unlock_irqrestore(&phba->hbalock, iflag);
        } else
                ha_copy = phba->ha_copy;

        work_ha_copy = ha_copy & phba->work_ha_mask;

        if (work_ha_copy) {
                if (work_ha_copy & HA_LATT) {
                        if (phba->sli.sli_flag & LPFC_PROCESS_LA) {
                                /*
                                 * Turn off Link Attention interrupts
                                 * until CLEAR_LA done
                                 */
                                spin_lock_irqsave(&phba->hbalock, iflag);
                                phba->sli.sli_flag &= ~LPFC_PROCESS_LA;
                                control = readl(phba->HCregaddr);
                                control &= ~HC_LAINT_ENA;
                                writel(control, phba->HCregaddr);
                                readl(phba->HCregaddr); /* flush */
                                spin_unlock_irqrestore(&phba->hbalock, iflag);
                        }
                        else
                                work_ha_copy &= ~HA_LATT;
                }

                if (work_ha_copy & ~(HA_ERATT | HA_MBATT | HA_LATT)) {
                        /*
                         * Turn off Slow Rings interrupts, LPFC_ELS_RING is
                         * the only slow ring.
                         */
                        status = (work_ha_copy &
                                (HA_RXMASK  << (4*LPFC_ELS_RING)));
                        status >>= (4*LPFC_ELS_RING);
                        if (status & HA_RXMASK) {
                                spin_lock_irqsave(&phba->hbalock, iflag);
                                control = readl(phba->HCregaddr);

                                lpfc_debugfs_slow_ring_trc(phba,
                                "ISR slow ring:   ctl:x%x stat:x%x isrcnt:x%x",
                                control, status,
                                (uint32_t)phba->sli.slistat.sli_intr);

                                if (control & (HC_R0INT_ENA << LPFC_ELS_RING)) {
                                        lpfc_debugfs_slow_ring_trc(phba,
                                                "ISR Disable ring:"
                                                "pwork:x%x hawork:x%x wait:x%x",
                                                phba->work_ha, work_ha_copy,
                                                (uint32_t)((unsigned long)
                                                &phba->work_waitq));

                                        control &=
                                            ~(HC_R0INT_ENA << LPFC_ELS_RING);
                                        writel(control, phba->HCregaddr);
                                        readl(phba->HCregaddr); /* flush */
                                }
                                else {
                                        lpfc_debugfs_slow_ring_trc(phba,
                                                "ISR slow ring:   pwork:"
                                                "x%x hawork:x%x wait:x%x",
                                                phba->work_ha, work_ha_copy,
                                                (uint32_t)((unsigned long)
                                                &phba->work_waitq));
                                }
                                spin_unlock_irqrestore(&phba->hbalock, iflag);
                        }
                }
                spin_lock_irqsave(&phba->hbalock, iflag);
                if (work_ha_copy & HA_ERATT) {
                        lpfc_sli_read_hs(phba);
                        /*
                         * Check if there is a deferred error condition
                         * is active
                         */
                        if ((HS_FFER1 & phba->work_hs) &&
                                ((HS_FFER2 | HS_FFER3 | HS_FFER4 | HS_FFER5 |
                                HS_FFER6 | HS_FFER7) & phba->work_hs)) {
                                phba->hba_flag |= DEFER_ERATT;
                                /* Clear all interrupt enable conditions */
                                writel(0, phba->HCregaddr);
                                readl(phba->HCregaddr);
                        }
                }

                if ((work_ha_copy & HA_MBATT) && (phba->sli.mbox_active)) {
                        pmb = phba->sli.mbox_active;
                        pmbox = &pmb->u.mb;
                        mbox = phba->mbox;
                        vport = pmb->vport;

                        /* First check out the status word */
                        lpfc_sli_pcimem_bcopy(mbox, pmbox, sizeof(uint32_t));
                        if (pmbox->mbxOwner != OWN_HOST) {
                                spin_unlock_irqrestore(&phba->hbalock, iflag);
                                /*
                                 * Stray Mailbox Interrupt, mbxCommand <cmd>
                                 * mbxStatus <status>
                                 */
                                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX |
                                                LOG_SLI,
                                                "(%d):0304 Stray Mailbox "
                                                "Interrupt mbxCommand x%x "
                                                "mbxStatus x%x\n",
                                                (vport ? vport->vpi : 0),
                                                pmbox->mbxCommand,
                                                pmbox->mbxStatus);
                                /* clear mailbox attention bit */
                                work_ha_copy &= ~HA_MBATT;
                        } else {
                                phba->sli.mbox_active = NULL;
                                spin_unlock_irqrestore(&phba->hbalock, iflag);
                                phba->last_completion_time = jiffies;
                                del_timer(&phba->sli.mbox_tmo);
                                if (pmb->mbox_cmpl) {
                                        lpfc_sli_pcimem_bcopy(mbox, pmbox,
                                                        MAILBOX_CMD_SIZE);
                                }
                                if (pmb->mbox_flag & LPFC_MBX_IMED_UNREG) {
                                        pmb->mbox_flag &= ~LPFC_MBX_IMED_UNREG;

                                        lpfc_debugfs_disc_trc(vport,
                                                LPFC_DISC_TRC_MBOX_VPORT,
                                                "MBOX dflt rpi: : "
                                                "status:x%x rpi:x%x",
                                                (uint32_t)pmbox->mbxStatus,
                                                pmbox->un.varWords[0], 0);

                                        if (!pmbox->mbxStatus) {
                                                mp = (struct lpfc_dmabuf *)
                                                        (pmb->context1);
                                                ndlp = (struct lpfc_nodelist *)
                                                        pmb->context2;

                                                /* Reg_LOGIN of dflt RPI was
                                                 * successful. new lets get
                                                 * rid of the RPI using the
                                                 * same mbox buffer.
                                                 */
                                                lpfc_unreg_login(phba,
                                                        vport->vpi,
                                                        pmbox->un.varWords[0],
                                                        pmb);
                                                pmb->mbox_cmpl =
                                                        lpfc_mbx_cmpl_dflt_rpi;
                                                pmb->context1 = mp;
                                                pmb->context2 = ndlp;
                                                pmb->vport = vport;
                                                rc = lpfc_sli_issue_mbox(phba,
                                                                pmb,
                                                                MBX_NOWAIT);
                                                if (rc != MBX_BUSY)
                                                        lpfc_printf_log(phba,
                                                        KERN_ERR,
                                                        LOG_MBOX | LOG_SLI,
                                                        "0350 rc should have"
                                                        "been MBX_BUSY\n");
                                                if (rc != MBX_NOT_FINISHED)
                                                        goto send_current_mbox;
                                        }
                                }
                                spin_lock_irqsave(
                                                &phba->pport->work_port_lock,
                                                iflag);
                                phba->pport->work_port_events &=
                                        ~WORKER_MBOX_TMO;
                                spin_unlock_irqrestore(
                                                &phba->pport->work_port_lock,
                                                iflag);
                                lpfc_mbox_cmpl_put(phba, pmb);
                        }
                } else
                        spin_unlock_irqrestore(&phba->hbalock, iflag);

                if ((work_ha_copy & HA_MBATT) &&
                    (phba->sli.mbox_active == NULL)) {
send_current_mbox:
                        /* Process next mailbox command if there is one */
                        do {
                                rc = lpfc_sli_issue_mbox(phba, NULL,
                                                         MBX_NOWAIT);
                        } while (rc == MBX_NOT_FINISHED);
                        if (rc != MBX_SUCCESS)
                                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX |
                                                LOG_SLI, "0349 rc should be "
                                                "MBX_SUCCESS\n");
                }

                spin_lock_irqsave(&phba->hbalock, iflag);
                phba->work_ha |= work_ha_copy;
                spin_unlock_irqrestore(&phba->hbalock, iflag);
                lpfc_worker_wake_up(phba);
        }
        return IRQ_HANDLED;

} /* lpfc_sli_sp_intr_handler */

/**
 * lpfc_sli_fp_intr_handler - Fast-path interrupt handler to SLI-3 device.
 * @irq: Interrupt number.
 * @dev_id: The device context pointer.
 *
 * This function is directly called from the PCI layer as an interrupt
 * service routine when device with SLI-3 interface spec is enabled with
 * MSI-X multi-message interrupt mode and there is a fast-path FCP IOCB
 * ring event in the HBA. However, when the device is enabled with either
 * MSI or Pin-IRQ interrupt mode, this function is called as part of the
 * device-level interrupt handler. When the PCI slot is in error recovery
 * or the HBA is undergoing initialization, the interrupt handler will not
 * process the interrupt. The SCSI FCP fast-path ring event are handled in
 * the intrrupt context. This function is called without any lock held.
 * It gets the hbalock to access and update SLI data structures.
 *
 * This function returns IRQ_HANDLED when interrupt is handled else it
 * returns IRQ_NONE.
 **/
irqreturn_t
lpfc_sli_fp_intr_handler(int irq, void *dev_id)
{
        struct lpfc_hba  *phba;
        uint32_t ha_copy;
        unsigned long status;
        unsigned long iflag;

        /* Get the driver's phba structure from the dev_id and
         * assume the HBA is not interrupting.
         */
        phba = (struct lpfc_hba *) dev_id;

        if (unlikely(!phba))
                return IRQ_NONE;

        /*
         * Stuff needs to be attented to when this function is invoked as an
         * individual interrupt handler in MSI-X multi-message interrupt mode
         */
        if (phba->intr_type == MSIX) {
                /* Check device state for handling interrupt */
                if (lpfc_intr_state_check(phba))
                        return IRQ_NONE;
                /* Need to read HA REG for FCP ring and other ring events */
                ha_copy = readl(phba->HAregaddr);
                /* Clear up only attention source related to fast-path */
                spin_lock_irqsave(&phba->hbalock, iflag);
                /*
                 * If there is deferred error attention, do not check for
                 * any interrupt.
                 */
                if (unlikely(phba->hba_flag & DEFER_ERATT)) {
                        spin_unlock_irqrestore(&phba->hbalock, iflag);
                        return IRQ_NONE;
                }
                writel((ha_copy & (HA_R0_CLR_MSK | HA_R1_CLR_MSK)),
                        phba->HAregaddr);
                readl(phba->HAregaddr); /* flush */
                spin_unlock_irqrestore(&phba->hbalock, iflag);
        } else
                ha_copy = phba->ha_copy;

        /*
         * Process all events on FCP ring. Take the optimized path for FCP IO.
         */
        ha_copy &= ~(phba->work_ha_mask);

        status = (ha_copy & (HA_RXMASK << (4*LPFC_FCP_RING)));
        status >>= (4*LPFC_FCP_RING);
        if (status & HA_RXMASK)
                lpfc_sli_handle_fast_ring_event(phba,
                                                &phba->sli.ring[LPFC_FCP_RING],
                                                status);

        if (phba->cfg_multi_ring_support == 2) {
                /*
                 * Process all events on extra ring. Take the optimized path
                 * for extra ring IO.
                 */
                status = (ha_copy & (HA_RXMASK << (4*LPFC_EXTRA_RING)));
                status >>= (4*LPFC_EXTRA_RING);
                if (status & HA_RXMASK) {
                        lpfc_sli_handle_fast_ring_event(phba,
                                        &phba->sli.ring[LPFC_EXTRA_RING],
                                        status);
                }
        }
        return IRQ_HANDLED;
}  /* lpfc_sli_fp_intr_handler */

/**
 * lpfc_sli_intr_handler - Device-level interrupt handler to SLI-3 device
 * @irq: Interrupt number.
 * @dev_id: The device context pointer.
 *
 * This function is the HBA device-level interrupt handler to device with
 * SLI-3 interface spec, called from the PCI layer when either MSI or
 * Pin-IRQ interrupt mode is enabled and there is an event in the HBA which
 * requires driver attention. This function invokes the slow-path interrupt
 * attention handling function and fast-path interrupt attention handling
 * function in turn to process the relevant HBA attention events. This
 * function is called without any lock held. It gets the hbalock to access
 * and update SLI data structures.
 *
 * This function returns IRQ_HANDLED when interrupt is handled, else it
 * returns IRQ_NONE.
 **/
irqreturn_t
lpfc_sli_intr_handler(int irq, void *dev_id)
{
        struct lpfc_hba  *phba;
        irqreturn_t sp_irq_rc, fp_irq_rc;
        unsigned long status1, status2;
        uint32_t hc_copy;

        /*
         * Get the driver's phba structure from the dev_id and
         * assume the HBA is not interrupting.
         */
        phba = (struct lpfc_hba *) dev_id;

        if (unlikely(!phba))
                return IRQ_NONE;

        /* Check device state for handling interrupt */
        if (lpfc_intr_state_check(phba))
                return IRQ_NONE;

        spin_lock(&phba->hbalock);
        phba->ha_copy = readl(phba->HAregaddr);
        if (unlikely(!phba->ha_copy)) {
                spin_unlock(&phba->hbalock);
                return IRQ_NONE;
        } else if (phba->ha_copy & HA_ERATT) {
                if (phba->hba_flag & HBA_ERATT_HANDLED)
                        /* ERATT polling has handled ERATT */
                        phba->ha_copy &= ~HA_ERATT;
                else
                        /* Indicate interrupt handler handles ERATT */
                        phba->hba_flag |= HBA_ERATT_HANDLED;
        }

        /*
         * If there is deferred error attention, do not check for any interrupt.
         */
        if (unlikely(phba->hba_flag & DEFER_ERATT)) {
                spin_unlock_irq(&phba->hbalock);
                return IRQ_NONE;
        }

        /* Clear attention sources except link and error attentions */
        hc_copy = readl(phba->HCregaddr);
        writel(hc_copy & ~(HC_MBINT_ENA | HC_R0INT_ENA | HC_R1INT_ENA
                | HC_R2INT_ENA | HC_LAINT_ENA | HC_ERINT_ENA),
                phba->HCregaddr);
        writel((phba->ha_copy & ~(HA_LATT | HA_ERATT)), phba->HAregaddr);
        writel(hc_copy, phba->HCregaddr);
        readl(phba->HAregaddr); /* flush */
        spin_unlock(&phba->hbalock);

        /*
         * Invokes slow-path host attention interrupt handling as appropriate.
         */

        /* status of events with mailbox and link attention */
        status1 = phba->ha_copy & (HA_MBATT | HA_LATT | HA_ERATT);

        /* status of events with ELS ring */
        status2 = (phba->ha_copy & (HA_RXMASK  << (4*LPFC_ELS_RING)));
        status2 >>= (4*LPFC_ELS_RING);

        if (status1 || (status2 & HA_RXMASK))
                sp_irq_rc = lpfc_sli_sp_intr_handler(irq, dev_id);
        else
                sp_irq_rc = IRQ_NONE;

        /*
         * Invoke fast-path host attention interrupt handling as appropriate.
         */

        /* status of events with FCP ring */
        status1 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_FCP_RING)));
        status1 >>= (4*LPFC_FCP_RING);

        /* status of events with extra ring */
        if (phba->cfg_multi_ring_support == 2) {
                status2 = (phba->ha_copy & (HA_RXMASK << (4*LPFC_EXTRA_RING)));
                status2 >>= (4*LPFC_EXTRA_RING);
        } else
                status2 = 0;

        if ((status1 & HA_RXMASK) || (status2 & HA_RXMASK))
                fp_irq_rc = lpfc_sli_fp_intr_handler(irq, dev_id);
        else
                fp_irq_rc = IRQ_NONE;

        /* Return device-level interrupt handling status */
        return (sp_irq_rc == IRQ_HANDLED) ? sp_irq_rc : fp_irq_rc;
}  /* lpfc_sli_intr_handler */

/**
 * lpfc_sli4_fcp_xri_abort_event_proc - Process fcp xri abort event
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked by the worker thread to process all the pending
 * SLI4 FCP abort XRI events.
 **/
void lpfc_sli4_fcp_xri_abort_event_proc(struct lpfc_hba *phba)
{
        struct lpfc_cq_event *cq_event;

        /* First, declare the fcp xri abort event has been handled */
        spin_lock_irq(&phba->hbalock);
        phba->hba_flag &= ~FCP_XRI_ABORT_EVENT;
        spin_unlock_irq(&phba->hbalock);
        /* Now, handle all the fcp xri abort events */
        while (!list_empty(&phba->sli4_hba.sp_fcp_xri_aborted_work_queue)) {
                /* Get the first event from the head of the event queue */
                spin_lock_irq(&phba->hbalock);
                list_remove_head(&phba->sli4_hba.sp_fcp_xri_aborted_work_queue,
                                 cq_event, struct lpfc_cq_event, list);
                spin_unlock_irq(&phba->hbalock);
                /* Notify aborted XRI for FCP work queue */
                lpfc_sli4_fcp_xri_aborted(phba, &cq_event->cqe.wcqe_axri);
                /* Free the event processed back to the free pool */
                lpfc_sli4_cq_event_release(phba, cq_event);
        }
}

/**
 * lpfc_sli4_els_xri_abort_event_proc - Process els xri abort event
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked by the worker thread to process all the pending
 * SLI4 els abort xri events.
 **/
void lpfc_sli4_els_xri_abort_event_proc(struct lpfc_hba *phba)
{
        struct lpfc_cq_event *cq_event;

        /* First, declare the els xri abort event has been handled */
        spin_lock_irq(&phba->hbalock);
        phba->hba_flag &= ~ELS_XRI_ABORT_EVENT;
        spin_unlock_irq(&phba->hbalock);
        /* Now, handle all the els xri abort events */
        while (!list_empty(&phba->sli4_hba.sp_els_xri_aborted_work_queue)) {
                /* Get the first event from the head of the event queue */
                spin_lock_irq(&phba->hbalock);
                list_remove_head(&phba->sli4_hba.sp_els_xri_aborted_work_queue,
                                 cq_event, struct lpfc_cq_event, list);
                spin_unlock_irq(&phba->hbalock);
                /* Notify aborted XRI for ELS work queue */
                lpfc_sli4_els_xri_aborted(phba, &cq_event->cqe.wcqe_axri);
                /* Free the event processed back to the free pool */
                lpfc_sli4_cq_event_release(phba, cq_event);
        }
}

/**
 * lpfc_sli4_iocb_param_transfer - Transfer pIocbOut and cmpl status to pIocbIn
 * @phba: pointer to lpfc hba data structure
 * @pIocbIn: pointer to the rspiocbq
 * @pIocbOut: pointer to the cmdiocbq
 * @wcqe: pointer to the complete wcqe
 *
 * This routine transfers the fields of a command iocbq to a response iocbq
 * by copying all the IOCB fields from command iocbq and transferring the
 * completion status information from the complete wcqe.
 **/
static void
lpfc_sli4_iocb_param_transfer(struct lpfc_hba *phba,
                              struct lpfc_iocbq *pIocbIn,
                              struct lpfc_iocbq *pIocbOut,
                              struct lpfc_wcqe_complete *wcqe)
{
        unsigned long iflags;
        size_t offset = offsetof(struct lpfc_iocbq, iocb);

        memcpy((char *)pIocbIn + offset, (char *)pIocbOut + offset,
               sizeof(struct lpfc_iocbq) - offset);
        /* Map WCQE parameters into irspiocb parameters */
        pIocbIn->iocb.ulpStatus = bf_get(lpfc_wcqe_c_status, wcqe);
        if (pIocbOut->iocb_flag & LPFC_IO_FCP)
                if (pIocbIn->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR)
                        pIocbIn->iocb.un.fcpi.fcpi_parm =
                                        pIocbOut->iocb.un.fcpi.fcpi_parm -
                                        wcqe->total_data_placed;
                else
                        pIocbIn->iocb.un.ulpWord[4] = wcqe->parameter;
        else {
                pIocbIn->iocb.un.ulpWord[4] = wcqe->parameter;
                pIocbIn->iocb.un.genreq64.bdl.bdeSize = wcqe->total_data_placed;
        }

        /* Pick up HBA exchange busy condition */
        if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
                spin_lock_irqsave(&phba->hbalock, iflags);
                pIocbIn->iocb_flag |= LPFC_EXCHANGE_BUSY;
                spin_unlock_irqrestore(&phba->hbalock, iflags);
        }
}

/**
 * lpfc_sli4_els_wcqe_to_rspiocbq - Get response iocbq from els wcqe
 * @phba: Pointer to HBA context object.
 * @wcqe: Pointer to work-queue completion queue entry.
 *
 * This routine handles an ELS work-queue completion event and construct
 * a pseudo response ELS IODBQ from the SLI4 ELS WCQE for the common
 * discovery engine to handle.
 *
 * Return: Pointer to the receive IOCBQ, NULL otherwise.
 **/
static struct lpfc_iocbq *
lpfc_sli4_els_wcqe_to_rspiocbq(struct lpfc_hba *phba,
                               struct lpfc_iocbq *irspiocbq)
{
        struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
        struct lpfc_iocbq *cmdiocbq;
        struct lpfc_wcqe_complete *wcqe;
        unsigned long iflags;

        wcqe = &irspiocbq->cq_event.cqe.wcqe_cmpl;
        spin_lock_irqsave(&phba->hbalock, iflags);
        pring->stats.iocb_event++;
        /* Look up the ELS command IOCB and create pseudo response IOCB */
        cmdiocbq = lpfc_sli_iocbq_lookup_by_tag(phba, pring,
                                bf_get(lpfc_wcqe_c_request_tag, wcqe));
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        if (unlikely(!cmdiocbq)) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "0386 ELS complete with no corresponding "
                                "cmdiocb: iotag (%d)\n",
                                bf_get(lpfc_wcqe_c_request_tag, wcqe));
                lpfc_sli_release_iocbq(phba, irspiocbq);
                return NULL;
        }

        /* Fake the irspiocbq and copy necessary response information */
        lpfc_sli4_iocb_param_transfer(phba, irspiocbq, cmdiocbq, wcqe);

        return irspiocbq;
}

/**
 * lpfc_sli4_sp_handle_async_event - Handle an asynchroous event
 * @phba: Pointer to HBA context object.
 * @cqe: Pointer to mailbox completion queue entry.
 *
 * This routine process a mailbox completion queue entry with asynchrous
 * event.
 *
 * Return: true if work posted to worker thread, otherwise false.
 **/
static bool
lpfc_sli4_sp_handle_async_event(struct lpfc_hba *phba, struct lpfc_mcqe *mcqe)
{
        struct lpfc_cq_event *cq_event;
        unsigned long iflags;

        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                        "0392 Async Event: word0:x%x, word1:x%x, "
                        "word2:x%x, word3:x%x\n", mcqe->word0,
                        mcqe->mcqe_tag0, mcqe->mcqe_tag1, mcqe->trailer);

        /* Allocate a new internal CQ_EVENT entry */
        cq_event = lpfc_sli4_cq_event_alloc(phba);
        if (!cq_event) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0394 Failed to allocate CQ_EVENT entry\n");
                return false;
        }

        /* Move the CQE into an asynchronous event entry */
        memcpy(&cq_event->cqe, mcqe, sizeof(struct lpfc_mcqe));
        spin_lock_irqsave(&phba->hbalock, iflags);
        list_add_tail(&cq_event->list, &phba->sli4_hba.sp_asynce_work_queue);
        /* Set the async event flag */
        phba->hba_flag |= ASYNC_EVENT;
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        return true;
}

/**
 * lpfc_sli4_sp_handle_mbox_event - Handle a mailbox completion event
 * @phba: Pointer to HBA context object.
 * @cqe: Pointer to mailbox completion queue entry.
 *
 * This routine process a mailbox completion queue entry with mailbox
 * completion event.
 *
 * Return: true if work posted to worker thread, otherwise false.
 **/
static bool
lpfc_sli4_sp_handle_mbox_event(struct lpfc_hba *phba, struct lpfc_mcqe *mcqe)
{
        uint32_t mcqe_status;
        MAILBOX_t *mbox, *pmbox;
        struct lpfc_mqe *mqe;
        struct lpfc_vport *vport;
        struct lpfc_nodelist *ndlp;
        struct lpfc_dmabuf *mp;
        unsigned long iflags;
        LPFC_MBOXQ_t *pmb;
        bool workposted = false;
        int rc;

        /* If not a mailbox complete MCQE, out by checking mailbox consume */
        if (!bf_get(lpfc_trailer_completed, mcqe))
                goto out_no_mqe_complete;

        /* Get the reference to the active mbox command */
        spin_lock_irqsave(&phba->hbalock, iflags);
        pmb = phba->sli.mbox_active;
        if (unlikely(!pmb)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
                                "1832 No pending MBOX command to handle\n");
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                goto out_no_mqe_complete;
        }
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        mqe = &pmb->u.mqe;
        pmbox = (MAILBOX_t *)&pmb->u.mqe;
        mbox = phba->mbox;
        vport = pmb->vport;

        /* Reset heartbeat timer */
        phba->last_completion_time = jiffies;
        del_timer(&phba->sli.mbox_tmo);

        /* Move mbox data to caller's mailbox region, do endian swapping */
        if (pmb->mbox_cmpl && mbox)
                lpfc_sli_pcimem_bcopy(mbox, mqe, sizeof(struct lpfc_mqe));
        /* Set the mailbox status with SLI4 range 0x4000 */
        mcqe_status = bf_get(lpfc_mcqe_status, mcqe);
        if (mcqe_status != MB_CQE_STATUS_SUCCESS)
                bf_set(lpfc_mqe_status, mqe,
                       (LPFC_MBX_ERROR_RANGE | mcqe_status));

        if (pmb->mbox_flag & LPFC_MBX_IMED_UNREG) {
                pmb->mbox_flag &= ~LPFC_MBX_IMED_UNREG;
                lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_MBOX_VPORT,
                                      "MBOX dflt rpi: status:x%x rpi:x%x",
                                      mcqe_status,
                                      pmbox->un.varWords[0], 0);
                if (mcqe_status == MB_CQE_STATUS_SUCCESS) {
                        mp = (struct lpfc_dmabuf *)(pmb->context1);
                        ndlp = (struct lpfc_nodelist *)pmb->context2;
                        /* Reg_LOGIN of dflt RPI was successful. Now lets get
                         * RID of the PPI using the same mbox buffer.
                         */
                        lpfc_unreg_login(phba, vport->vpi,
                                         pmbox->un.varWords[0], pmb);
                        pmb->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
                        pmb->context1 = mp;
                        pmb->context2 = ndlp;
                        pmb->vport = vport;
                        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
                        if (rc != MBX_BUSY)
                                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX |
                                                LOG_SLI, "0385 rc should "
                                                "have been MBX_BUSY\n");
                        if (rc != MBX_NOT_FINISHED)
                                goto send_current_mbox;
                }
        }
        spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
        phba->pport->work_port_events &= ~WORKER_MBOX_TMO;
        spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);

        /* There is mailbox completion work to do */
        spin_lock_irqsave(&phba->hbalock, iflags);
        __lpfc_mbox_cmpl_put(phba, pmb);
        phba->work_ha |= HA_MBATT;
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        workposted = true;

send_current_mbox:
        spin_lock_irqsave(&phba->hbalock, iflags);
        /* Release the mailbox command posting token */
        phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
        /* Setting active mailbox pointer need to be in sync to flag clear */
        phba->sli.mbox_active = NULL;
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        /* Wake up worker thread to post the next pending mailbox command */
        lpfc_worker_wake_up(phba);
out_no_mqe_complete:
        if (bf_get(lpfc_trailer_consumed, mcqe))
                lpfc_sli4_mq_release(phba->sli4_hba.mbx_wq);
        return workposted;
}

/**
 * lpfc_sli4_sp_handle_mcqe - Process a mailbox completion queue entry
 * @phba: Pointer to HBA context object.
 * @cqe: Pointer to mailbox completion queue entry.
 *
 * This routine process a mailbox completion queue entry, it invokes the
 * proper mailbox complete handling or asynchrous event handling routine
 * according to the MCQE's async bit.
 *
 * Return: true if work posted to worker thread, otherwise false.
 **/
static bool
lpfc_sli4_sp_handle_mcqe(struct lpfc_hba *phba, struct lpfc_cqe *cqe)
{
        struct lpfc_mcqe mcqe;
        bool workposted;

        /* Copy the mailbox MCQE and convert endian order as needed */
        lpfc_sli_pcimem_bcopy(cqe, &mcqe, sizeof(struct lpfc_mcqe));

        /* Invoke the proper event handling routine */
        if (!bf_get(lpfc_trailer_async, &mcqe))
                workposted = lpfc_sli4_sp_handle_mbox_event(phba, &mcqe);
        else
                workposted = lpfc_sli4_sp_handle_async_event(phba, &mcqe);
        return workposted;
}

/**
 * lpfc_sli4_sp_handle_els_wcqe - Handle els work-queue completion event
 * @phba: Pointer to HBA context object.
 * @wcqe: Pointer to work-queue completion queue entry.
 *
 * This routine handles an ELS work-queue completion event.
 *
 * Return: true if work posted to worker thread, otherwise false.
 **/
static bool
lpfc_sli4_sp_handle_els_wcqe(struct lpfc_hba *phba,
                             struct lpfc_wcqe_complete *wcqe)
{
        struct lpfc_iocbq *irspiocbq;
        unsigned long iflags;

        /* Get an irspiocbq for later ELS response processing use */
        irspiocbq = lpfc_sli_get_iocbq(phba);
        if (!irspiocbq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0387 Failed to allocate an iocbq\n");
                return false;
        }

        /* Save off the slow-path queue event for work thread to process */
        memcpy(&irspiocbq->cq_event.cqe.wcqe_cmpl, wcqe, sizeof(*wcqe));
        spin_lock_irqsave(&phba->hbalock, iflags);
        list_add_tail(&irspiocbq->cq_event.list,
                      &phba->sli4_hba.sp_queue_event);
        phba->hba_flag |= HBA_SP_QUEUE_EVT;
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        return true;
}

/**
 * lpfc_sli4_sp_handle_rel_wcqe - Handle slow-path WQ entry consumed event
 * @phba: Pointer to HBA context object.
 * @wcqe: Pointer to work-queue completion queue entry.
 *
 * This routine handles slow-path WQ entry comsumed event by invoking the
 * proper WQ release routine to the slow-path WQ.
 **/
static void
lpfc_sli4_sp_handle_rel_wcqe(struct lpfc_hba *phba,
                             struct lpfc_wcqe_release *wcqe)
{
        /* Check for the slow-path ELS work queue */
        if (bf_get(lpfc_wcqe_r_wq_id, wcqe) == phba->sli4_hba.els_wq->queue_id)
                lpfc_sli4_wq_release(phba->sli4_hba.els_wq,
                                     bf_get(lpfc_wcqe_r_wqe_index, wcqe));
        else
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "2579 Slow-path wqe consume event carries "
                                "miss-matched qid: wcqe-qid=x%x, sp-qid=x%x\n",
                                bf_get(lpfc_wcqe_r_wqe_index, wcqe),
                                phba->sli4_hba.els_wq->queue_id);
}

/**
 * lpfc_sli4_sp_handle_abort_xri_wcqe - Handle a xri abort event
 * @phba: Pointer to HBA context object.
 * @cq: Pointer to a WQ completion queue.
 * @wcqe: Pointer to work-queue completion queue entry.
 *
 * This routine handles an XRI abort event.
 *
 * Return: true if work posted to worker thread, otherwise false.
 **/
static bool
lpfc_sli4_sp_handle_abort_xri_wcqe(struct lpfc_hba *phba,
                                   struct lpfc_queue *cq,
                                   struct sli4_wcqe_xri_aborted *wcqe)
{
        bool workposted = false;
        struct lpfc_cq_event *cq_event;
        unsigned long iflags;

        /* Allocate a new internal CQ_EVENT entry */
        cq_event = lpfc_sli4_cq_event_alloc(phba);
        if (!cq_event) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0602 Failed to allocate CQ_EVENT entry\n");
                return false;
        }

        /* Move the CQE into the proper xri abort event list */
        memcpy(&cq_event->cqe, wcqe, sizeof(struct sli4_wcqe_xri_aborted));
        switch (cq->subtype) {
        case LPFC_FCP:
                spin_lock_irqsave(&phba->hbalock, iflags);
                list_add_tail(&cq_event->list,
                              &phba->sli4_hba.sp_fcp_xri_aborted_work_queue);
                /* Set the fcp xri abort event flag */
                phba->hba_flag |= FCP_XRI_ABORT_EVENT;
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                workposted = true;
                break;
        case LPFC_ELS:
                spin_lock_irqsave(&phba->hbalock, iflags);
                list_add_tail(&cq_event->list,
                              &phba->sli4_hba.sp_els_xri_aborted_work_queue);
                /* Set the els xri abort event flag */
                phba->hba_flag |= ELS_XRI_ABORT_EVENT;
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                workposted = true;
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0603 Invalid work queue CQE subtype (x%x)\n",
                                cq->subtype);
                workposted = false;
                break;
        }
        return workposted;
}

/**
 * lpfc_sli4_sp_handle_rcqe - Process a receive-queue completion queue entry
 * @phba: Pointer to HBA context object.
 * @rcqe: Pointer to receive-queue completion queue entry.
 *
 * This routine process a receive-queue completion queue entry.
 *
 * Return: true if work posted to worker thread, otherwise false.
 **/
static bool
lpfc_sli4_sp_handle_rcqe(struct lpfc_hba *phba, struct lpfc_rcqe *rcqe)
{
        bool workposted = false;
        struct lpfc_queue *hrq = phba->sli4_hba.hdr_rq;
        struct lpfc_queue *drq = phba->sli4_hba.dat_rq;
        struct hbq_dmabuf *dma_buf;
        uint32_t status;
        unsigned long iflags;

        if (bf_get(lpfc_rcqe_rq_id, rcqe) != hrq->queue_id)
                goto out;

        status = bf_get(lpfc_rcqe_status, rcqe);
        switch (status) {
        case FC_STATUS_RQ_BUF_LEN_EXCEEDED:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2537 Receive Frame Truncated!!\n");
        case FC_STATUS_RQ_SUCCESS:
                lpfc_sli4_rq_release(hrq, drq);
                spin_lock_irqsave(&phba->hbalock, iflags);
                dma_buf = lpfc_sli_hbqbuf_get(&phba->hbqs[0].hbq_buffer_list);
                if (!dma_buf) {
                        spin_unlock_irqrestore(&phba->hbalock, iflags);
                        goto out;
                }
                memcpy(&dma_buf->cq_event.cqe.rcqe_cmpl, rcqe, sizeof(*rcqe));
                /* save off the frame for the word thread to process */
                list_add_tail(&dma_buf->cq_event.list,
                              &phba->sli4_hba.sp_queue_event);
                /* Frame received */
                phba->hba_flag |= HBA_SP_QUEUE_EVT;
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                workposted = true;
                break;
        case FC_STATUS_INSUFF_BUF_NEED_BUF:
        case FC_STATUS_INSUFF_BUF_FRM_DISC:
                /* Post more buffers if possible */
                spin_lock_irqsave(&phba->hbalock, iflags);
                phba->hba_flag |= HBA_POST_RECEIVE_BUFFER;
                spin_unlock_irqrestore(&phba->hbalock, iflags);
                workposted = true;
                break;
        }
out:
        return workposted;
}

/**
 * lpfc_sli4_sp_handle_cqe - Process a slow path completion queue entry
 * @phba: Pointer to HBA context object.
 * @cq: Pointer to the completion queue.
 * @wcqe: Pointer to a completion queue entry.
 *
 * This routine process a slow-path work-queue or recieve queue completion queue
 * entry.
 *
 * Return: true if work posted to worker thread, otherwise false.
 **/
static bool
lpfc_sli4_sp_handle_cqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
                         struct lpfc_cqe *cqe)
{
        struct lpfc_cqe cqevt;
        bool workposted = false;

        /* Copy the work queue CQE and convert endian order if needed */
        lpfc_sli_pcimem_bcopy(cqe, &cqevt, sizeof(struct lpfc_cqe));

        /* Check and process for different type of WCQE and dispatch */
        switch (bf_get(lpfc_cqe_code, &cqevt)) {
        case CQE_CODE_COMPL_WQE:
                /* Process the WQ/RQ complete event */
                workposted = lpfc_sli4_sp_handle_els_wcqe(phba,
                                (struct lpfc_wcqe_complete *)&cqevt);
                break;
        case CQE_CODE_RELEASE_WQE:
                /* Process the WQ release event */
                lpfc_sli4_sp_handle_rel_wcqe(phba,
                                (struct lpfc_wcqe_release *)&cqevt);
                break;
        case CQE_CODE_XRI_ABORTED:
                /* Process the WQ XRI abort event */
                workposted = lpfc_sli4_sp_handle_abort_xri_wcqe(phba, cq,
                                (struct sli4_wcqe_xri_aborted *)&cqevt);
                break;
        case CQE_CODE_RECEIVE:
                /* Process the RQ event */
                workposted = lpfc_sli4_sp_handle_rcqe(phba,
                                (struct lpfc_rcqe *)&cqevt);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0388 Not a valid WCQE code: x%x\n",
                                bf_get(lpfc_cqe_code, &cqevt));
                break;
        }
        return workposted;
}

/**
 * lpfc_sli4_sp_handle_eqe - Process a slow-path event queue entry
 * @phba: Pointer to HBA context object.
 * @eqe: Pointer to fast-path event queue entry.
 *
 * This routine process a event queue entry from the slow-path event queue.
 * It will check the MajorCode and MinorCode to determine this is for a
 * completion event on a completion queue, if not, an error shall be logged
 * and just return. Otherwise, it will get to the corresponding completion
 * queue and process all the entries on that completion queue, rearm the
 * completion queue, and then return.
 *
 **/
static void
lpfc_sli4_sp_handle_eqe(struct lpfc_hba *phba, struct lpfc_eqe *eqe)
{
        struct lpfc_queue *cq = NULL, *childq, *speq;
        struct lpfc_cqe *cqe;
        bool workposted = false;
        int ecount = 0;
        uint16_t cqid;

        if (bf_get(lpfc_eqe_major_code, eqe) != 0) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0359 Not a valid slow-path completion "
                                "event: majorcode=x%x, minorcode=x%x\n",
                                bf_get(lpfc_eqe_major_code, eqe),
                                bf_get(lpfc_eqe_minor_code, eqe));
                return;
        }

        /* Get the reference to the corresponding CQ */
        cqid = bf_get(lpfc_eqe_resource_id, eqe);

        /* Search for completion queue pointer matching this cqid */
        speq = phba->sli4_hba.sp_eq;
        list_for_each_entry(childq, &speq->child_list, list) {
                if (childq->queue_id == cqid) {
                        cq = childq;
                        break;
                }
        }
        if (unlikely(!cq)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0365 Slow-path CQ identifier (%d) does "
                                "not exist\n", cqid);
                return;
        }

        /* Process all the entries to the CQ */
        switch (cq->type) {
        case LPFC_MCQ:
                while ((cqe = lpfc_sli4_cq_get(cq))) {
                        workposted |= lpfc_sli4_sp_handle_mcqe(phba, cqe);
                        if (!(++ecount % LPFC_GET_QE_REL_INT))
                                lpfc_sli4_cq_release(cq, LPFC_QUEUE_NOARM);
                }
                break;
        case LPFC_WCQ:
                while ((cqe = lpfc_sli4_cq_get(cq))) {
                        workposted |= lpfc_sli4_sp_handle_cqe(phba, cq, cqe);
                        if (!(++ecount % LPFC_GET_QE_REL_INT))
                                lpfc_sli4_cq_release(cq, LPFC_QUEUE_NOARM);
                }
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0370 Invalid completion queue type (%d)\n",
                                cq->type);
                return;
        }

        /* Catch the no cq entry condition, log an error */
        if (unlikely(ecount == 0))
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0371 No entry from the CQ: identifier "
                                "(x%x), type (%d)\n", cq->queue_id, cq->type);

        /* In any case, flash and re-arm the RCQ */
        lpfc_sli4_cq_release(cq, LPFC_QUEUE_REARM);

        /* wake up worker thread if there are works to be done */
        if (workposted)
                lpfc_worker_wake_up(phba);
}

/**
 * lpfc_sli4_fp_handle_fcp_wcqe - Process fast-path work queue completion entry
 * @eqe: Pointer to fast-path completion queue entry.
 *
 * This routine process a fast-path work queue completion entry from fast-path
 * event queue for FCP command response completion.
 **/
static void
lpfc_sli4_fp_handle_fcp_wcqe(struct lpfc_hba *phba,
                             struct lpfc_wcqe_complete *wcqe)
{
        struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_FCP_RING];
        struct lpfc_iocbq *cmdiocbq;
        struct lpfc_iocbq irspiocbq;
        unsigned long iflags;

        spin_lock_irqsave(&phba->hbalock, iflags);
        pring->stats.iocb_event++;
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        /* Check for response status */
        if (unlikely(bf_get(lpfc_wcqe_c_status, wcqe))) {
                /* If resource errors reported from HBA, reduce queue
                 * depth of the SCSI device.
                 */
                if ((bf_get(lpfc_wcqe_c_status, wcqe) ==
                     IOSTAT_LOCAL_REJECT) &&
                    (wcqe->parameter == IOERR_NO_RESOURCES)) {
                        phba->lpfc_rampdown_queue_depth(phba);
                }
                /* Log the error status */
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "0373 FCP complete error: status=x%x, "
                                "hw_status=x%x, total_data_specified=%d, "
                                "parameter=x%x, word3=x%x\n",
                                bf_get(lpfc_wcqe_c_status, wcqe),
                                bf_get(lpfc_wcqe_c_hw_status, wcqe),
                                wcqe->total_data_placed, wcqe->parameter,
                                wcqe->word3);
        }

        /* Look up the FCP command IOCB and create pseudo response IOCB */
        spin_lock_irqsave(&phba->hbalock, iflags);
        cmdiocbq = lpfc_sli_iocbq_lookup_by_tag(phba, pring,
                                bf_get(lpfc_wcqe_c_request_tag, wcqe));
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        if (unlikely(!cmdiocbq)) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "0374 FCP complete with no corresponding "
                                "cmdiocb: iotag (%d)\n",
                                bf_get(lpfc_wcqe_c_request_tag, wcqe));
                return;
        }
        if (unlikely(!cmdiocbq->iocb_cmpl)) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "0375 FCP cmdiocb not callback function "
                                "iotag: (%d)\n",
                                bf_get(lpfc_wcqe_c_request_tag, wcqe));
                return;
        }

        /* Fake the irspiocb and copy necessary response information */
        lpfc_sli4_iocb_param_transfer(phba, &irspiocbq, cmdiocbq, wcqe);

        /* Pass the cmd_iocb and the rsp state to the upper layer */
        (cmdiocbq->iocb_cmpl)(phba, cmdiocbq, &irspiocbq);
}

/**
 * lpfc_sli4_fp_handle_rel_wcqe - Handle fast-path WQ entry consumed event
 * @phba: Pointer to HBA context object.
 * @cq: Pointer to completion queue.
 * @wcqe: Pointer to work-queue completion queue entry.
 *
 * This routine handles an fast-path WQ entry comsumed event by invoking the
 * proper WQ release routine to the slow-path WQ.
 **/
static void
lpfc_sli4_fp_handle_rel_wcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
                             struct lpfc_wcqe_release *wcqe)
{
        struct lpfc_queue *childwq;
        bool wqid_matched = false;
        uint16_t fcp_wqid;

        /* Check for fast-path FCP work queue release */
        fcp_wqid = bf_get(lpfc_wcqe_r_wq_id, wcqe);
        list_for_each_entry(childwq, &cq->child_list, list) {
                if (childwq->queue_id == fcp_wqid) {
                        lpfc_sli4_wq_release(childwq,
                                        bf_get(lpfc_wcqe_r_wqe_index, wcqe));
                        wqid_matched = true;
                        break;
                }
        }
        /* Report warning log message if no match found */
        if (wqid_matched != true)
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "2580 Fast-path wqe consume event carries "
                                "miss-matched qid: wcqe-qid=x%x\n", fcp_wqid);
}

/**
 * lpfc_sli4_fp_handle_wcqe - Process fast-path work queue completion entry
 * @cq: Pointer to the completion queue.
 * @eqe: Pointer to fast-path completion queue entry.
 *
 * This routine process a fast-path work queue completion entry from fast-path
 * event queue for FCP command response completion.
 **/
static int
lpfc_sli4_fp_handle_wcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
                         struct lpfc_cqe *cqe)
{
        struct lpfc_wcqe_release wcqe;
        bool workposted = false;

        /* Copy the work queue CQE and convert endian order if needed */
        lpfc_sli_pcimem_bcopy(cqe, &wcqe, sizeof(struct lpfc_cqe));

        /* Check and process for different type of WCQE and dispatch */
        switch (bf_get(lpfc_wcqe_c_code, &wcqe)) {
        case CQE_CODE_COMPL_WQE:
                /* Process the WQ complete event */
                lpfc_sli4_fp_handle_fcp_wcqe(phba,
                                (struct lpfc_wcqe_complete *)&wcqe);
                break;
        case CQE_CODE_RELEASE_WQE:
                /* Process the WQ release event */
                lpfc_sli4_fp_handle_rel_wcqe(phba, cq,
                                (struct lpfc_wcqe_release *)&wcqe);
                break;
        case CQE_CODE_XRI_ABORTED:
                /* Process the WQ XRI abort event */
                workposted = lpfc_sli4_sp_handle_abort_xri_wcqe(phba, cq,
                                (struct sli4_wcqe_xri_aborted *)&wcqe);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0144 Not a valid WCQE code: x%x\n",
                                bf_get(lpfc_wcqe_c_code, &wcqe));
                break;
        }
        return workposted;
}

/**
 * lpfc_sli4_fp_handle_eqe - Process a fast-path event queue entry
 * @phba: Pointer to HBA context object.
 * @eqe: Pointer to fast-path event queue entry.
 *
 * This routine process a event queue entry from the fast-path event queue.
 * It will check the MajorCode and MinorCode to determine this is for a
 * completion event on a completion queue, if not, an error shall be logged
 * and just return. Otherwise, it will get to the corresponding completion
 * queue and process all the entries on the completion queue, rearm the
 * completion queue, and then return.
 **/
static void
lpfc_sli4_fp_handle_eqe(struct lpfc_hba *phba, struct lpfc_eqe *eqe,
                        uint32_t fcp_cqidx)
{
        struct lpfc_queue *cq;
        struct lpfc_cqe *cqe;
        bool workposted = false;
        uint16_t cqid;
        int ecount = 0;

        if (unlikely(bf_get(lpfc_eqe_major_code, eqe) != 0)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0366 Not a valid fast-path completion "
                                "event: majorcode=x%x, minorcode=x%x\n",
                                bf_get(lpfc_eqe_major_code, eqe),
                                bf_get(lpfc_eqe_minor_code, eqe));
                return;
        }

        cq = phba->sli4_hba.fcp_cq[fcp_cqidx];
        if (unlikely(!cq)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0367 Fast-path completion queue does not "
                                "exist\n");
                return;
        }

        /* Get the reference to the corresponding CQ */
        cqid = bf_get(lpfc_eqe_resource_id, eqe);
        if (unlikely(cqid != cq->queue_id)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0368 Miss-matched fast-path completion "
                                "queue identifier: eqcqid=%d, fcpcqid=%d\n",
                                cqid, cq->queue_id);
                return;
        }

        /* Process all the entries to the CQ */
        while ((cqe = lpfc_sli4_cq_get(cq))) {
                workposted |= lpfc_sli4_fp_handle_wcqe(phba, cq, cqe);
                if (!(++ecount % LPFC_GET_QE_REL_INT))
                        lpfc_sli4_cq_release(cq, LPFC_QUEUE_NOARM);
        }

        /* Catch the no cq entry condition */
        if (unlikely(ecount == 0))
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0369 No entry from fast-path completion "
                                "queue fcpcqid=%d\n", cq->queue_id);

        /* In any case, flash and re-arm the CQ */
        lpfc_sli4_cq_release(cq, LPFC_QUEUE_REARM);

        /* wake up worker thread if there are works to be done */
        if (workposted)
                lpfc_worker_wake_up(phba);
}

static void
lpfc_sli4_eq_flush(struct lpfc_hba *phba, struct lpfc_queue *eq)
{
        struct lpfc_eqe *eqe;

        /* walk all the EQ entries and drop on the floor */
        while ((eqe = lpfc_sli4_eq_get(eq)))
                ;

        /* Clear and re-arm the EQ */
        lpfc_sli4_eq_release(eq, LPFC_QUEUE_REARM);
}

/**
 * lpfc_sli4_sp_intr_handler - Slow-path interrupt handler to SLI-4 device
 * @irq: Interrupt number.
 * @dev_id: The device context pointer.
 *
 * This function is directly called from the PCI layer as an interrupt
 * service routine when device with SLI-4 interface spec is enabled with
 * MSI-X multi-message interrupt mode and there are slow-path events in
 * the HBA. However, when the device is enabled with either MSI or Pin-IRQ
 * interrupt mode, this function is called as part of the device-level
 * interrupt handler. When the PCI slot is in error recovery or the HBA is
 * undergoing initialization, the interrupt handler will not process the
 * interrupt. The link attention and ELS ring attention events are handled
 * by the worker thread. The interrupt handler signals the worker thread
 * and returns for these events. This function is called without any lock
 * held. It gets the hbalock to access and update SLI data structures.
 *
 * This function returns IRQ_HANDLED when interrupt is handled else it
 * returns IRQ_NONE.
 **/
irqreturn_t
lpfc_sli4_sp_intr_handler(int irq, void *dev_id)
{
        struct lpfc_hba *phba;
        struct lpfc_queue *speq;
        struct lpfc_eqe *eqe;
        unsigned long iflag;
        int ecount = 0;

        /*
         * Get the driver's phba structure from the dev_id
         */
        phba = (struct lpfc_hba *)dev_id;

        if (unlikely(!phba))
                return IRQ_NONE;

        /* Get to the EQ struct associated with this vector */
        speq = phba->sli4_hba.sp_eq;

        /* Check device state for handling interrupt */
        if (unlikely(lpfc_intr_state_check(phba))) {
                /* Check again for link_state with lock held */
                spin_lock_irqsave(&phba->hbalock, iflag);
                if (phba->link_state < LPFC_LINK_DOWN)
                        /* Flush, clear interrupt, and rearm the EQ */
                        lpfc_sli4_eq_flush(phba, speq);
                spin_unlock_irqrestore(&phba->hbalock, iflag);
                return IRQ_NONE;
        }

        /*
         * Process all the event on FCP slow-path EQ
         */
        while ((eqe = lpfc_sli4_eq_get(speq))) {
                lpfc_sli4_sp_handle_eqe(phba, eqe);
                if (!(++ecount % LPFC_GET_QE_REL_INT))
                        lpfc_sli4_eq_release(speq, LPFC_QUEUE_NOARM);
        }

        /* Always clear and re-arm the slow-path EQ */
        lpfc_sli4_eq_release(speq, LPFC_QUEUE_REARM);

        /* Catch the no cq entry condition */
        if (unlikely(ecount == 0)) {
                if (phba->intr_type == MSIX)
                        /* MSI-X treated interrupt served as no EQ share INT */
                        lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                        "0357 MSI-X interrupt with no EQE\n");
                else
                        /* Non MSI-X treated on interrupt as EQ share INT */
                        return IRQ_NONE;
        }

        return IRQ_HANDLED;
} /* lpfc_sli4_sp_intr_handler */

/**
 * lpfc_sli4_fp_intr_handler - Fast-path interrupt handler to SLI-4 device
 * @irq: Interrupt number.
 * @dev_id: The device context pointer.
 *
 * This function is directly called from the PCI layer as an interrupt
 * service routine when device with SLI-4 interface spec is enabled with
 * MSI-X multi-message interrupt mode and there is a fast-path FCP IOCB
 * ring event in the HBA. However, when the device is enabled with either
 * MSI or Pin-IRQ interrupt mode, this function is called as part of the
 * device-level interrupt handler. When the PCI slot is in error recovery
 * or the HBA is undergoing initialization, the interrupt handler will not
 * process the interrupt. The SCSI FCP fast-path ring event are handled in
 * the intrrupt context. This function is called without any lock held.
 * It gets the hbalock to access and update SLI data structures. Note that,
 * the FCP EQ to FCP CQ are one-to-one map such that the FCP EQ index is
 * equal to that of FCP CQ index.
 *
 * This function returns IRQ_HANDLED when interrupt is handled else it
 * returns IRQ_NONE.
 **/
irqreturn_t
lpfc_sli4_fp_intr_handler(int irq, void *dev_id)
{
        struct lpfc_hba *phba;
        struct lpfc_fcp_eq_hdl *fcp_eq_hdl;
        struct lpfc_queue *fpeq;
        struct lpfc_eqe *eqe;
        unsigned long iflag;
        int ecount = 0;
        uint32_t fcp_eqidx;

        /* Get the driver's phba structure from the dev_id */
        fcp_eq_hdl = (struct lpfc_fcp_eq_hdl *)dev_id;
        phba = fcp_eq_hdl->phba;
        fcp_eqidx = fcp_eq_hdl->idx;

        if (unlikely(!phba))
                return IRQ_NONE;

        /* Get to the EQ struct associated with this vector */
        fpeq = phba->sli4_hba.fp_eq[fcp_eqidx];

        /* Check device state for handling interrupt */
        if (unlikely(lpfc_intr_state_check(phba))) {
                /* Check again for link_state with lock held */
                spin_lock_irqsave(&phba->hbalock, iflag);
                if (phba->link_state < LPFC_LINK_DOWN)
                        /* Flush, clear interrupt, and rearm the EQ */
                        lpfc_sli4_eq_flush(phba, fpeq);
                spin_unlock_irqrestore(&phba->hbalock, iflag);
                return IRQ_NONE;
        }

        /*
         * Process all the event on FCP fast-path EQ
         */
        while ((eqe = lpfc_sli4_eq_get(fpeq))) {
                lpfc_sli4_fp_handle_eqe(phba, eqe, fcp_eqidx);
                if (!(++ecount % LPFC_GET_QE_REL_INT))
                        lpfc_sli4_eq_release(fpeq, LPFC_QUEUE_NOARM);
        }

        /* Always clear and re-arm the fast-path EQ */
        lpfc_sli4_eq_release(fpeq, LPFC_QUEUE_REARM);

        if (unlikely(ecount == 0)) {
                if (phba->intr_type == MSIX)
                        /* MSI-X treated interrupt served as no EQ share INT */
                        lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                        "0358 MSI-X interrupt with no EQE\n");
                else
                        /* Non MSI-X treated on interrupt as EQ share INT */
                        return IRQ_NONE;
        }

        return IRQ_HANDLED;
} /* lpfc_sli4_fp_intr_handler */

/**
 * lpfc_sli4_intr_handler - Device-level interrupt handler for SLI-4 device
 * @irq: Interrupt number.
 * @dev_id: The device context pointer.
 *
 * This function is the device-level interrupt handler to device with SLI-4
 * interface spec, called from the PCI layer when either MSI or Pin-IRQ
 * interrupt mode is enabled and there is an event in the HBA which requires
 * driver attention. This function invokes the slow-path interrupt attention
 * handling function and fast-path interrupt attention handling function in
 * turn to process the relevant HBA attention events. This function is called
 * without any lock held. It gets the hbalock to access and update SLI data
 * structures.
 *
 * This function returns IRQ_HANDLED when interrupt is handled, else it
 * returns IRQ_NONE.
 **/
irqreturn_t
lpfc_sli4_intr_handler(int irq, void *dev_id)
{
        struct lpfc_hba  *phba;
        irqreturn_t sp_irq_rc, fp_irq_rc;
        bool fp_handled = false;
        uint32_t fcp_eqidx;

        /* Get the driver's phba structure from the dev_id */
        phba = (struct lpfc_hba *)dev_id;

        if (unlikely(!phba))
                return IRQ_NONE;

        /*
         * Invokes slow-path host attention interrupt handling as appropriate.
         */
        sp_irq_rc = lpfc_sli4_sp_intr_handler(irq, dev_id);

        /*
         * Invoke fast-path host attention interrupt handling as appropriate.
         */
        for (fcp_eqidx = 0; fcp_eqidx < phba->cfg_fcp_eq_count; fcp_eqidx++) {
                fp_irq_rc = lpfc_sli4_fp_intr_handler(irq,
                                        &phba->sli4_hba.fcp_eq_hdl[fcp_eqidx]);
                if (fp_irq_rc == IRQ_HANDLED)
                        fp_handled |= true;
        }

        return (fp_handled == true) ? IRQ_HANDLED : sp_irq_rc;
} /* lpfc_sli4_intr_handler */

/**
 * lpfc_sli4_queue_free - free a queue structure and associated memory
 * @queue: The queue structure to free.
 *
 * This function frees a queue structure and the DMAable memeory used for
 * the host resident queue. This function must be called after destroying the
 * queue on the HBA.
 **/
void
lpfc_sli4_queue_free(struct lpfc_queue *queue)
{
        struct lpfc_dmabuf *dmabuf;

        if (!queue)
                return;

        while (!list_empty(&queue->page_list)) {
                list_remove_head(&queue->page_list, dmabuf, struct lpfc_dmabuf,
                                 list);
                dma_free_coherent(&queue->phba->pcidev->dev, PAGE_SIZE,
                                  dmabuf->virt, dmabuf->phys);
                kfree(dmabuf);
        }
        kfree(queue);
        return;
}

/**
 * lpfc_sli4_queue_alloc - Allocate and initialize a queue structure
 * @phba: The HBA that this queue is being created on.
 * @entry_size: The size of each queue entry for this queue.
 * @entry count: The number of entries that this queue will handle.
 *
 * This function allocates a queue structure and the DMAable memory used for
 * the host resident queue. This function must be called before creating the
 * queue on the HBA.
 **/
struct lpfc_queue *
lpfc_sli4_queue_alloc(struct lpfc_hba *phba, uint32_t entry_size,
                      uint32_t entry_count)
{
        struct lpfc_queue *queue;
        struct lpfc_dmabuf *dmabuf;
        int x, total_qe_count;
        void *dma_pointer;


        queue = kzalloc(sizeof(struct lpfc_queue) +
                        (sizeof(union sli4_qe) * entry_count), GFP_KERNEL);
        if (!queue)
                return NULL;
        queue->page_count = (PAGE_ALIGN(entry_size * entry_count))/PAGE_SIZE;
        INIT_LIST_HEAD(&queue->list);
        INIT_LIST_HEAD(&queue->page_list);
        INIT_LIST_HEAD(&queue->child_list);
        for (x = 0, total_qe_count = 0; x < queue->page_count; x++) {
                dmabuf = kzalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
                if (!dmabuf)
                        goto out_fail;
                dmabuf->virt = dma_alloc_coherent(&phba->pcidev->dev,
                                                  PAGE_SIZE, &dmabuf->phys,
                                                  GFP_KERNEL);
                if (!dmabuf->virt) {
                        kfree(dmabuf);
                        goto out_fail;
                }
                memset(dmabuf->virt, 0, PAGE_SIZE);
                dmabuf->buffer_tag = x;
                list_add_tail(&dmabuf->list, &queue->page_list);
                /* initialize queue's entry array */
                dma_pointer = dmabuf->virt;
                for (; total_qe_count < entry_count &&
                     dma_pointer < (PAGE_SIZE + dmabuf->virt);
                     total_qe_count++, dma_pointer += entry_size) {
                        queue->qe[total_qe_count].address = dma_pointer;
                }
        }
        queue->entry_size = entry_size;
        queue->entry_count = entry_count;
        queue->phba = phba;

        return queue;
out_fail:
        lpfc_sli4_queue_free(queue);
        return NULL;
}

/**
 * lpfc_eq_create - Create an Event Queue on the HBA
 * @phba: HBA structure that indicates port to create a queue on.
 * @eq: The queue structure to use to create the event queue.
 * @imax: The maximum interrupt per second limit.
 *
 * This function creates an event queue, as detailed in @eq, on a port,
 * described by @phba by sending an EQ_CREATE mailbox command to the HBA.
 *
 * The @phba struct is used to send mailbox command to HBA. The @eq struct
 * is used to get the entry count and entry size that are necessary to
 * determine the number of pages to allocate and use for this queue. This
 * function will send the EQ_CREATE mailbox command to the HBA to setup the
 * event queue. This function is asynchronous and will wait for the mailbox
 * command to finish before continuing.
 *
 * On success this function will return a zero. If unable to allocate enough
 * memory this function will return ENOMEM. If the queue create mailbox command
 * fails this function will return ENXIO.
 **/
uint32_t
lpfc_eq_create(struct lpfc_hba *phba, struct lpfc_queue *eq, uint16_t imax)
{
        struct lpfc_mbx_eq_create *eq_create;
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        struct lpfc_dmabuf *dmabuf;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;
        uint16_t dmult;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_eq_create) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_EQ_CREATE,
                         length, LPFC_SLI4_MBX_EMBED);
        eq_create = &mbox->u.mqe.un.eq_create;
        bf_set(lpfc_mbx_eq_create_num_pages, &eq_create->u.request,
               eq->page_count);
        bf_set(lpfc_eq_context_size, &eq_create->u.request.context,
               LPFC_EQE_SIZE);
        bf_set(lpfc_eq_context_valid, &eq_create->u.request.context, 1);
        /* Calculate delay multiper from maximum interrupt per second */
        dmult = LPFC_DMULT_CONST/imax - 1;
        bf_set(lpfc_eq_context_delay_multi, &eq_create->u.request.context,
               dmult);
        switch (eq->entry_count) {
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0360 Unsupported EQ count. (%d)\n",
                                eq->entry_count);
                if (eq->entry_count < 256)
                        return -EINVAL;
                /* otherwise default to smallest count (drop through) */
        case 256:
                bf_set(lpfc_eq_context_count, &eq_create->u.request.context,
                       LPFC_EQ_CNT_256);
                break;
        case 512:
                bf_set(lpfc_eq_context_count, &eq_create->u.request.context,
                       LPFC_EQ_CNT_512);
                break;
        case 1024:
                bf_set(lpfc_eq_context_count, &eq_create->u.request.context,
                       LPFC_EQ_CNT_1024);
                break;
        case 2048:
                bf_set(lpfc_eq_context_count, &eq_create->u.request.context,
                       LPFC_EQ_CNT_2048);
                break;
        case 4096:
                bf_set(lpfc_eq_context_count, &eq_create->u.request.context,
                       LPFC_EQ_CNT_4096);
                break;
        }
        list_for_each_entry(dmabuf, &eq->page_list, list) {
                eq_create->u.request.page[dmabuf->buffer_tag].addr_lo =
                                        putPaddrLow(dmabuf->phys);
                eq_create->u.request.page[dmabuf->buffer_tag].addr_hi =
                                        putPaddrHigh(dmabuf->phys);
        }
        mbox->vport = phba->pport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        mbox->context1 = NULL;
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        shdr = (union lpfc_sli4_cfg_shdr *) &eq_create->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2500 EQ_CREATE mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
        }
        eq->type = LPFC_EQ;
        eq->subtype = LPFC_NONE;
        eq->queue_id = bf_get(lpfc_mbx_eq_create_q_id, &eq_create->u.response);
        if (eq->queue_id == 0xFFFF)
                status = -ENXIO;
        eq->host_index = 0;
        eq->hba_index = 0;

        mempool_free(mbox, phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_cq_create - Create a Completion Queue on the HBA
 * @phba: HBA structure that indicates port to create a queue on.
 * @cq: The queue structure to use to create the completion queue.
 * @eq: The event queue to bind this completion queue to.
 *
 * This function creates a completion queue, as detailed in @wq, on a port,
 * described by @phba by sending a CQ_CREATE mailbox command to the HBA.
 *
 * The @phba struct is used to send mailbox command to HBA. The @cq struct
 * is used to get the entry count and entry size that are necessary to
 * determine the number of pages to allocate and use for this queue. The @eq
 * is used to indicate which event queue to bind this completion queue to. This
 * function will send the CQ_CREATE mailbox command to the HBA to setup the
 * completion queue. This function is asynchronous and will wait for the mailbox
 * command to finish before continuing.
 *
 * On success this function will return a zero. If unable to allocate enough
 * memory this function will return ENOMEM. If the queue create mailbox command
 * fails this function will return ENXIO.
 **/
uint32_t
lpfc_cq_create(struct lpfc_hba *phba, struct lpfc_queue *cq,
               struct lpfc_queue *eq, uint32_t type, uint32_t subtype)
{
        struct lpfc_mbx_cq_create *cq_create;
        struct lpfc_dmabuf *dmabuf;
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_cq_create) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_CQ_CREATE,
                         length, LPFC_SLI4_MBX_EMBED);
        cq_create = &mbox->u.mqe.un.cq_create;
        bf_set(lpfc_mbx_cq_create_num_pages, &cq_create->u.request,
                    cq->page_count);
        bf_set(lpfc_cq_context_event, &cq_create->u.request.context, 1);
        bf_set(lpfc_cq_context_valid, &cq_create->u.request.context, 1);
        bf_set(lpfc_cq_eq_id, &cq_create->u.request.context, eq->queue_id);
        switch (cq->entry_count) {
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0361 Unsupported CQ count. (%d)\n",
                                cq->entry_count);
                if (cq->entry_count < 256)
                        return -EINVAL;
                /* otherwise default to smallest count (drop through) */
        case 256:
                bf_set(lpfc_cq_context_count, &cq_create->u.request.context,
                       LPFC_CQ_CNT_256);
                break;
        case 512:
                bf_set(lpfc_cq_context_count, &cq_create->u.request.context,
                       LPFC_CQ_CNT_512);
                break;
        case 1024:
                bf_set(lpfc_cq_context_count, &cq_create->u.request.context,
                       LPFC_CQ_CNT_1024);
                break;
        }
        list_for_each_entry(dmabuf, &cq->page_list, list) {
                cq_create->u.request.page[dmabuf->buffer_tag].addr_lo =
                                        putPaddrLow(dmabuf->phys);
                cq_create->u.request.page[dmabuf->buffer_tag].addr_hi =
                                        putPaddrHigh(dmabuf->phys);
        }
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);

        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *) &cq_create->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2501 CQ_CREATE mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
                goto out;
        }
        cq->queue_id = bf_get(lpfc_mbx_cq_create_q_id, &cq_create->u.response);
        if (cq->queue_id == 0xFFFF) {
                status = -ENXIO;
                goto out;
        }
        /* link the cq onto the parent eq child list */
        list_add_tail(&cq->list, &eq->child_list);
        /* Set up completion queue's type and subtype */
        cq->type = type;
        cq->subtype = subtype;
        cq->queue_id = bf_get(lpfc_mbx_cq_create_q_id, &cq_create->u.response);
        cq->host_index = 0;
        cq->hba_index = 0;

out:
        mempool_free(mbox, phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_mq_create - Create a mailbox Queue on the HBA
 * @phba: HBA structure that indicates port to create a queue on.
 * @mq: The queue structure to use to create the mailbox queue.
 *
 * This function creates a mailbox queue, as detailed in @mq, on a port,
 * described by @phba by sending a MQ_CREATE mailbox command to the HBA.
 *
 * The @phba struct is used to send mailbox command to HBA. The @cq struct
 * is used to get the entry count and entry size that are necessary to
 * determine the number of pages to allocate and use for this queue. This
 * function will send the MQ_CREATE mailbox command to the HBA to setup the
 * mailbox queue. This function is asynchronous and will wait for the mailbox
 * command to finish before continuing.
 *
 * On success this function will return a zero. If unable to allocate enough
 * memory this function will return ENOMEM. If the queue create mailbox command
 * fails this function will return ENXIO.
 **/
uint32_t
lpfc_mq_create(struct lpfc_hba *phba, struct lpfc_queue *mq,
               struct lpfc_queue *cq, uint32_t subtype)
{
        struct lpfc_mbx_mq_create *mq_create;
        struct lpfc_dmabuf *dmabuf;
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_mq_create) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_MQ_CREATE,
                         length, LPFC_SLI4_MBX_EMBED);
        mq_create = &mbox->u.mqe.un.mq_create;
        bf_set(lpfc_mbx_mq_create_num_pages, &mq_create->u.request,
                    mq->page_count);
        bf_set(lpfc_mq_context_cq_id, &mq_create->u.request.context,
                    cq->queue_id);
        bf_set(lpfc_mq_context_valid, &mq_create->u.request.context, 1);
        switch (mq->entry_count) {
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0362 Unsupported MQ count. (%d)\n",
                                mq->entry_count);
                if (mq->entry_count < 16)
                        return -EINVAL;
                /* otherwise default to smallest count (drop through) */
        case 16:
                bf_set(lpfc_mq_context_count, &mq_create->u.request.context,
                       LPFC_MQ_CNT_16);
                break;
        case 32:
                bf_set(lpfc_mq_context_count, &mq_create->u.request.context,
                       LPFC_MQ_CNT_32);
                break;
        case 64:
                bf_set(lpfc_mq_context_count, &mq_create->u.request.context,
                       LPFC_MQ_CNT_64);
                break;
        case 128:
                bf_set(lpfc_mq_context_count, &mq_create->u.request.context,
                       LPFC_MQ_CNT_128);
                break;
        }
        list_for_each_entry(dmabuf, &mq->page_list, list) {
                mq_create->u.request.page[dmabuf->buffer_tag].addr_lo =
                                        putPaddrLow(dmabuf->phys);
                mq_create->u.request.page[dmabuf->buffer_tag].addr_hi =
                                        putPaddrHigh(dmabuf->phys);
        }
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *) &mq_create->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2502 MQ_CREATE mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
                goto out;
        }
        mq->queue_id = bf_get(lpfc_mbx_mq_create_q_id, &mq_create->u.response);
        if (mq->queue_id == 0xFFFF) {
                status = -ENXIO;
                goto out;
        }
        mq->type = LPFC_MQ;
        mq->subtype = subtype;
        mq->host_index = 0;
        mq->hba_index = 0;

        /* link the mq onto the parent cq child list */
        list_add_tail(&mq->list, &cq->child_list);
out:
        mempool_free(mbox, phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_wq_create - Create a Work Queue on the HBA
 * @phba: HBA structure that indicates port to create a queue on.
 * @wq: The queue structure to use to create the work queue.
 * @cq: The completion queue to bind this work queue to.
 * @subtype: The subtype of the work queue indicating its functionality.
 *
 * This function creates a work queue, as detailed in @wq, on a port, described
 * by @phba by sending a WQ_CREATE mailbox command to the HBA.
 *
 * The @phba struct is used to send mailbox command to HBA. The @wq struct
 * is used to get the entry count and entry size that are necessary to
 * determine the number of pages to allocate and use for this queue. The @cq
 * is used to indicate which completion queue to bind this work queue to. This
 * function will send the WQ_CREATE mailbox command to the HBA to setup the
 * work queue. This function is asynchronous and will wait for the mailbox
 * command to finish before continuing.
 *
 * On success this function will return a zero. If unable to allocate enough
 * memory this function will return ENOMEM. If the queue create mailbox command
 * fails this function will return ENXIO.
 **/
uint32_t
lpfc_wq_create(struct lpfc_hba *phba, struct lpfc_queue *wq,
               struct lpfc_queue *cq, uint32_t subtype)
{
        struct lpfc_mbx_wq_create *wq_create;
        struct lpfc_dmabuf *dmabuf;
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_wq_create) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_WQ_CREATE,
                         length, LPFC_SLI4_MBX_EMBED);
        wq_create = &mbox->u.mqe.un.wq_create;
        bf_set(lpfc_mbx_wq_create_num_pages, &wq_create->u.request,
                    wq->page_count);
        bf_set(lpfc_mbx_wq_create_cq_id, &wq_create->u.request,
                    cq->queue_id);
        list_for_each_entry(dmabuf, &wq->page_list, list) {
                wq_create->u.request.page[dmabuf->buffer_tag].addr_lo =
                                        putPaddrLow(dmabuf->phys);
                wq_create->u.request.page[dmabuf->buffer_tag].addr_hi =
                                        putPaddrHigh(dmabuf->phys);
        }
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *) &wq_create->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2503 WQ_CREATE mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
                goto out;
        }
        wq->queue_id = bf_get(lpfc_mbx_wq_create_q_id, &wq_create->u.response);
        if (wq->queue_id == 0xFFFF) {
                status = -ENXIO;
                goto out;
        }
        wq->type = LPFC_WQ;
        wq->subtype = subtype;
        wq->host_index = 0;
        wq->hba_index = 0;

        /* link the wq onto the parent cq child list */
        list_add_tail(&wq->list, &cq->child_list);
out:
        mempool_free(mbox, phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_rq_create - Create a Receive Queue on the HBA
 * @phba: HBA structure that indicates port to create a queue on.
 * @hrq: The queue structure to use to create the header receive queue.
 * @drq: The queue structure to use to create the data receive queue.
 * @cq: The completion queue to bind this work queue to.
 *
 * This function creates a receive buffer queue pair , as detailed in @hrq and
 * @drq, on a port, described by @phba by sending a RQ_CREATE mailbox command
 * to the HBA.
 *
 * The @phba struct is used to send mailbox command to HBA. The @drq and @hrq
 * struct is used to get the entry count that is necessary to determine the
 * number of pages to use for this queue. The @cq is used to indicate which
 * completion queue to bind received buffers that are posted to these queues to.
 * This function will send the RQ_CREATE mailbox command to the HBA to setup the
 * receive queue pair. This function is asynchronous and will wait for the
 * mailbox command to finish before continuing.
 *
 * On success this function will return a zero. If unable to allocate enough
 * memory this function will return ENOMEM. If the queue create mailbox command
 * fails this function will return ENXIO.
 **/
uint32_t
lpfc_rq_create(struct lpfc_hba *phba, struct lpfc_queue *hrq,
               struct lpfc_queue *drq, struct lpfc_queue *cq, uint32_t subtype)
{
        struct lpfc_mbx_rq_create *rq_create;
        struct lpfc_dmabuf *dmabuf;
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (hrq->entry_count != drq->entry_count)
                return -EINVAL;
        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_rq_create) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_RQ_CREATE,
                         length, LPFC_SLI4_MBX_EMBED);
        rq_create = &mbox->u.mqe.un.rq_create;
        switch (hrq->entry_count) {
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2535 Unsupported RQ count. (%d)\n",
                                hrq->entry_count);
                if (hrq->entry_count < 512)
                        return -EINVAL;
                /* otherwise default to smallest count (drop through) */
        case 512:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_512);
                break;
        case 1024:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_1024);
                break;
        case 2048:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_2048);
                break;
        case 4096:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_4096);
                break;
        }
        bf_set(lpfc_rq_context_cq_id, &rq_create->u.request.context,
               cq->queue_id);
        bf_set(lpfc_mbx_rq_create_num_pages, &rq_create->u.request,
               hrq->page_count);
        bf_set(lpfc_rq_context_buf_size, &rq_create->u.request.context,
               LPFC_HDR_BUF_SIZE);
        list_for_each_entry(dmabuf, &hrq->page_list, list) {
                rq_create->u.request.page[dmabuf->buffer_tag].addr_lo =
                                        putPaddrLow(dmabuf->phys);
                rq_create->u.request.page[dmabuf->buffer_tag].addr_hi =
                                        putPaddrHigh(dmabuf->phys);
        }
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *) &rq_create->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2504 RQ_CREATE mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
                goto out;
        }
        hrq->queue_id = bf_get(lpfc_mbx_rq_create_q_id, &rq_create->u.response);
        if (hrq->queue_id == 0xFFFF) {
                status = -ENXIO;
                goto out;
        }
        hrq->type = LPFC_HRQ;
        hrq->subtype = subtype;
        hrq->host_index = 0;
        hrq->hba_index = 0;

        /* now create the data queue */
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_RQ_CREATE,
                         length, LPFC_SLI4_MBX_EMBED);
        switch (drq->entry_count) {
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2536 Unsupported RQ count. (%d)\n",
                                drq->entry_count);
                if (drq->entry_count < 512)
                        return -EINVAL;
                /* otherwise default to smallest count (drop through) */
        case 512:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_512);
                break;
        case 1024:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_1024);
                break;
        case 2048:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_2048);
                break;
        case 4096:
                bf_set(lpfc_rq_context_rq_size, &rq_create->u.request.context,
                       LPFC_RQ_RING_SIZE_4096);
                break;
        }
        bf_set(lpfc_rq_context_cq_id, &rq_create->u.request.context,
               cq->queue_id);
        bf_set(lpfc_mbx_rq_create_num_pages, &rq_create->u.request,
               drq->page_count);
        bf_set(lpfc_rq_context_buf_size, &rq_create->u.request.context,
               LPFC_DATA_BUF_SIZE);
        list_for_each_entry(dmabuf, &drq->page_list, list) {
                rq_create->u.request.page[dmabuf->buffer_tag].addr_lo =
                                        putPaddrLow(dmabuf->phys);
                rq_create->u.request.page[dmabuf->buffer_tag].addr_hi =
                                        putPaddrHigh(dmabuf->phys);
        }
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *) &rq_create->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                status = -ENXIO;
                goto out;
        }
        drq->queue_id = bf_get(lpfc_mbx_rq_create_q_id, &rq_create->u.response);
        if (drq->queue_id == 0xFFFF) {
                status = -ENXIO;
                goto out;
        }
        drq->type = LPFC_DRQ;
        drq->subtype = subtype;
        drq->host_index = 0;
        drq->hba_index = 0;

        /* link the header and data RQs onto the parent cq child list */
        list_add_tail(&hrq->list, &cq->child_list);
        list_add_tail(&drq->list, &cq->child_list);

out:
        mempool_free(mbox, phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_eq_destroy - Destroy an event Queue on the HBA
 * @eq: The queue structure associated with the queue to destroy.
 *
 * This function destroys a queue, as detailed in @eq by sending an mailbox
 * command, specific to the type of queue, to the HBA.
 *
 * The @eq struct is used to get the queue ID of the queue to destroy.
 *
 * On success this function will return a zero. If the queue destroy mailbox
 * command fails this function will return ENXIO.
 **/
uint32_t
lpfc_eq_destroy(struct lpfc_hba *phba, struct lpfc_queue *eq)
{
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (!eq)
                return -ENODEV;
        mbox = mempool_alloc(eq->phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_eq_destroy) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_EQ_DESTROY,
                         length, LPFC_SLI4_MBX_EMBED);
        bf_set(lpfc_mbx_eq_destroy_q_id, &mbox->u.mqe.un.eq_destroy.u.request,
               eq->queue_id);
        mbox->vport = eq->phba->pport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;

        rc = lpfc_sli_issue_mbox(eq->phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mbox->u.mqe.un.eq_destroy.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2505 EQ_DESTROY mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
        }

        /* Remove eq from any list */
        list_del_init(&eq->list);
        mempool_free(mbox, eq->phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_cq_destroy - Destroy a Completion Queue on the HBA
 * @cq: The queue structure associated with the queue to destroy.
 *
 * This function destroys a queue, as detailed in @cq by sending an mailbox
 * command, specific to the type of queue, to the HBA.
 *
 * The @cq struct is used to get the queue ID of the queue to destroy.
 *
 * On success this function will return a zero. If the queue destroy mailbox
 * command fails this function will return ENXIO.
 **/
uint32_t
lpfc_cq_destroy(struct lpfc_hba *phba, struct lpfc_queue *cq)
{
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (!cq)
                return -ENODEV;
        mbox = mempool_alloc(cq->phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_cq_destroy) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_CQ_DESTROY,
                         length, LPFC_SLI4_MBX_EMBED);
        bf_set(lpfc_mbx_cq_destroy_q_id, &mbox->u.mqe.un.cq_destroy.u.request,
               cq->queue_id);
        mbox->vport = cq->phba->pport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        rc = lpfc_sli_issue_mbox(cq->phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mbox->u.mqe.un.wq_create.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2506 CQ_DESTROY mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
        }
        /* Remove cq from any list */
        list_del_init(&cq->list);
        mempool_free(mbox, cq->phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_mq_destroy - Destroy a Mailbox Queue on the HBA
 * @qm: The queue structure associated with the queue to destroy.
 *
 * This function destroys a queue, as detailed in @mq by sending an mailbox
 * command, specific to the type of queue, to the HBA.
 *
 * The @mq struct is used to get the queue ID of the queue to destroy.
 *
 * On success this function will return a zero. If the queue destroy mailbox
 * command fails this function will return ENXIO.
 **/
uint32_t
lpfc_mq_destroy(struct lpfc_hba *phba, struct lpfc_queue *mq)
{
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (!mq)
                return -ENODEV;
        mbox = mempool_alloc(mq->phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_mq_destroy) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_MQ_DESTROY,
                         length, LPFC_SLI4_MBX_EMBED);
        bf_set(lpfc_mbx_mq_destroy_q_id, &mbox->u.mqe.un.mq_destroy.u.request,
               mq->queue_id);
        mbox->vport = mq->phba->pport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        rc = lpfc_sli_issue_mbox(mq->phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mbox->u.mqe.un.mq_destroy.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2507 MQ_DESTROY mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
        }
        /* Remove mq from any list */
        list_del_init(&mq->list);
        mempool_free(mbox, mq->phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_wq_destroy - Destroy a Work Queue on the HBA
 * @wq: The queue structure associated with the queue to destroy.
 *
 * This function destroys a queue, as detailed in @wq by sending an mailbox
 * command, specific to the type of queue, to the HBA.
 *
 * The @wq struct is used to get the queue ID of the queue to destroy.
 *
 * On success this function will return a zero. If the queue destroy mailbox
 * command fails this function will return ENXIO.
 **/
uint32_t
lpfc_wq_destroy(struct lpfc_hba *phba, struct lpfc_queue *wq)
{
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (!wq)
                return -ENODEV;
        mbox = mempool_alloc(wq->phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_wq_destroy) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_WQ_DESTROY,
                         length, LPFC_SLI4_MBX_EMBED);
        bf_set(lpfc_mbx_wq_destroy_q_id, &mbox->u.mqe.un.wq_destroy.u.request,
               wq->queue_id);
        mbox->vport = wq->phba->pport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        rc = lpfc_sli_issue_mbox(wq->phba, mbox, MBX_POLL);
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mbox->u.mqe.un.wq_destroy.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2508 WQ_DESTROY mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
        }
        /* Remove wq from any list */
        list_del_init(&wq->list);
        mempool_free(mbox, wq->phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_rq_destroy - Destroy a Receive Queue on the HBA
 * @rq: The queue structure associated with the queue to destroy.
 *
 * This function destroys a queue, as detailed in @rq by sending an mailbox
 * command, specific to the type of queue, to the HBA.
 *
 * The @rq struct is used to get the queue ID of the queue to destroy.
 *
 * On success this function will return a zero. If the queue destroy mailbox
 * command fails this function will return ENXIO.
 **/
uint32_t
lpfc_rq_destroy(struct lpfc_hba *phba, struct lpfc_queue *hrq,
                struct lpfc_queue *drq)
{
        LPFC_MBOXQ_t *mbox;
        int rc, length, status = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (!hrq || !drq)
                return -ENODEV;
        mbox = mempool_alloc(hrq->phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;
        length = (sizeof(struct lpfc_mbx_rq_destroy) -
                  sizeof(struct mbox_header));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_RQ_DESTROY,
                         length, LPFC_SLI4_MBX_EMBED);
        bf_set(lpfc_mbx_rq_destroy_q_id, &mbox->u.mqe.un.rq_destroy.u.request,
               hrq->queue_id);
        mbox->vport = hrq->phba->pport;
        mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        rc = lpfc_sli_issue_mbox(hrq->phba, mbox, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mbox->u.mqe.un.rq_destroy.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2509 RQ_DESTROY mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                if (rc != MBX_TIMEOUT)
                        mempool_free(mbox, hrq->phba->mbox_mem_pool);
                return -ENXIO;
        }
        bf_set(lpfc_mbx_rq_destroy_q_id, &mbox->u.mqe.un.rq_destroy.u.request,
               drq->queue_id);
        rc = lpfc_sli_issue_mbox(drq->phba, mbox, MBX_POLL);
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mbox->u.mqe.un.rq_destroy.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2510 RQ_DESTROY mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                status = -ENXIO;
        }
        list_del_init(&hrq->list);
        list_del_init(&drq->list);
        mempool_free(mbox, hrq->phba->mbox_mem_pool);
        return status;
}

/**
 * lpfc_sli4_post_sgl - Post scatter gather list for an XRI to HBA
 * @phba: The virtual port for which this call being executed.
 * @pdma_phys_addr0: Physical address of the 1st SGL page.
 * @pdma_phys_addr1: Physical address of the 2nd SGL page.
 * @xritag: the xritag that ties this io to the SGL pages.
 *
 * This routine will post the sgl pages for the IO that has the xritag
 * that is in the iocbq structure. The xritag is assigned during iocbq
 * creation and persists for as long as the driver is loaded.
 * if the caller has fewer than 256 scatter gather segments to map then
 * pdma_phys_addr1 should be 0.
 * If the caller needs to map more than 256 scatter gather segment then
 * pdma_phys_addr1 should be a valid physical address.
 * physical address for SGLs must be 64 byte aligned.
 * If you are going to map 2 SGL's then the first one must have 256 entries
 * the second sgl can have between 1 and 256 entries.
 *
 * Return codes:
 *      0 - Success
 *      -ENXIO, -ENOMEM - Failure
 **/
int
lpfc_sli4_post_sgl(struct lpfc_hba *phba,
                dma_addr_t pdma_phys_addr0,
                dma_addr_t pdma_phys_addr1,
                uint16_t xritag)
{
        struct lpfc_mbx_post_sgl_pages *post_sgl_pages;
        LPFC_MBOXQ_t *mbox;
        int rc;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (xritag == NO_XRI) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0364 Invalid param:\n");
                return -EINVAL;
        }

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;

        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                        LPFC_MBOX_OPCODE_FCOE_POST_SGL_PAGES,
                        sizeof(struct lpfc_mbx_post_sgl_pages) -
                        sizeof(struct mbox_header), LPFC_SLI4_MBX_EMBED);

        post_sgl_pages = (struct lpfc_mbx_post_sgl_pages *)
                                &mbox->u.mqe.un.post_sgl_pages;
        bf_set(lpfc_post_sgl_pages_xri, post_sgl_pages, xritag);
        bf_set(lpfc_post_sgl_pages_xricnt, post_sgl_pages, 1);

        post_sgl_pages->sgl_pg_pairs[0].sgl_pg0_addr_lo =
                                cpu_to_le32(putPaddrLow(pdma_phys_addr0));
        post_sgl_pages->sgl_pg_pairs[0].sgl_pg0_addr_hi =
                                cpu_to_le32(putPaddrHigh(pdma_phys_addr0));

        post_sgl_pages->sgl_pg_pairs[0].sgl_pg1_addr_lo =
                                cpu_to_le32(putPaddrLow(pdma_phys_addr1));
        post_sgl_pages->sgl_pg_pairs[0].sgl_pg1_addr_hi =
                                cpu_to_le32(putPaddrHigh(pdma_phys_addr1));
        if (!phba->sli4_hba.intr_enable)
                rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        else
                rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *) &post_sgl_pages->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (rc != MBX_TIMEOUT)
                mempool_free(mbox, phba->mbox_mem_pool);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2511 POST_SGL mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                rc = -ENXIO;
        }
        return 0;
}
/**
 * lpfc_sli4_remove_all_sgl_pages - Post scatter gather list for an XRI to HBA
 * @phba: The virtual port for which this call being executed.
 *
 * This routine will remove all of the sgl pages registered with the hba.
 *
 * Return codes:
 *      0 - Success
 *      -ENXIO, -ENOMEM - Failure
 **/
int
lpfc_sli4_remove_all_sgl_pages(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *mbox;
        int rc;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;

        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                        LPFC_MBOX_OPCODE_FCOE_REMOVE_SGL_PAGES, 0,
                        LPFC_SLI4_MBX_EMBED);
        if (!phba->sli4_hba.intr_enable)
                rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        else
                rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mbox->u.mqe.un.sli4_config.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (rc != MBX_TIMEOUT)
                mempool_free(mbox, phba->mbox_mem_pool);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2512 REMOVE_ALL_SGL_PAGES mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                rc = -ENXIO;
        }
        return rc;
}

/**
 * lpfc_sli4_next_xritag - Get an xritag for the io
 * @phba: Pointer to HBA context object.
 *
 * This function gets an xritag for the iocb. If there is no unused xritag
 * it will return 0xffff.
 * The function returns the allocated xritag if successful, else returns zero.
 * Zero is not a valid xritag.
 * The caller is not required to hold any lock.
 **/
uint16_t
lpfc_sli4_next_xritag(struct lpfc_hba *phba)
{
        uint16_t xritag;

        spin_lock_irq(&phba->hbalock);
        xritag = phba->sli4_hba.next_xri;
        if ((xritag != (uint16_t) -1) && xritag <
                (phba->sli4_hba.max_cfg_param.max_xri
                        + phba->sli4_hba.max_cfg_param.xri_base)) {
                phba->sli4_hba.next_xri++;
                phba->sli4_hba.max_cfg_param.xri_used++;
                spin_unlock_irq(&phba->hbalock);
                return xritag;
        }
        spin_unlock_irq(&phba->hbalock);
        lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                        "2004 Failed to allocate XRI.last XRITAG is %d"
                        " Max XRI is %d, Used XRI is %d\n",
                        phba->sli4_hba.next_xri,
                        phba->sli4_hba.max_cfg_param.max_xri,
                        phba->sli4_hba.max_cfg_param.xri_used);
        return -1;
}

/**
 * lpfc_sli4_post_sgl_list - post a block of sgl list to the firmware.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to post a block of driver's sgl pages to the
 * HBA using non-embedded mailbox command. No Lock is held. This routine
 * is only called when the driver is loading and after all IO has been
 * stopped.
 **/
int
lpfc_sli4_post_sgl_list(struct lpfc_hba *phba)
{
        struct lpfc_sglq *sglq_entry;
        struct lpfc_mbx_post_uembed_sgl_page1 *sgl;
        struct sgl_page_pairs *sgl_pg_pairs;
        void *viraddr;
        LPFC_MBOXQ_t *mbox;
        uint32_t reqlen, alloclen, pg_pairs;
        uint32_t mbox_tmo;
        uint16_t xritag_start = 0;
        int els_xri_cnt, rc = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        /* The number of sgls to be posted */
        els_xri_cnt = lpfc_sli4_get_els_iocb_cnt(phba);

        reqlen = els_xri_cnt * sizeof(struct sgl_page_pairs) +
                 sizeof(union lpfc_sli4_cfg_shdr) + sizeof(uint32_t);
        if (reqlen > PAGE_SIZE) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "2559 Block sgl registration required DMA "
                                "size (%d) great than a page\n", reqlen);
                return -ENOMEM;
        }
        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2560 Failed to allocate mbox cmd memory\n");
                return -ENOMEM;
        }

        /* Allocate DMA memory and set up the non-embedded mailbox command */
        alloclen = lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_POST_SGL_PAGES, reqlen,
                         LPFC_SLI4_MBX_NEMBED);

        if (alloclen < reqlen) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0285 Allocated DMA memory size (%d) is "
                                "less than the requested DMA memory "
                                "size (%d)\n", alloclen, reqlen);
                lpfc_sli4_mbox_cmd_free(phba, mbox);
                return -ENOMEM;
        }
        /* Get the first SGE entry from the non-embedded DMA memory */
        viraddr = mbox->sge_array->addr[0];

        /* Set up the SGL pages in the non-embedded DMA pages */
        sgl = (struct lpfc_mbx_post_uembed_sgl_page1 *)viraddr;
        sgl_pg_pairs = &sgl->sgl_pg_pairs;

        for (pg_pairs = 0; pg_pairs < els_xri_cnt; pg_pairs++) {
                sglq_entry = phba->sli4_hba.lpfc_els_sgl_array[pg_pairs];
                /* Set up the sge entry */
                sgl_pg_pairs->sgl_pg0_addr_lo =
                                cpu_to_le32(putPaddrLow(sglq_entry->phys));
                sgl_pg_pairs->sgl_pg0_addr_hi =
                                cpu_to_le32(putPaddrHigh(sglq_entry->phys));
                sgl_pg_pairs->sgl_pg1_addr_lo =
                                cpu_to_le32(putPaddrLow(0));
                sgl_pg_pairs->sgl_pg1_addr_hi =
                                cpu_to_le32(putPaddrHigh(0));
                /* Keep the first xritag on the list */
                if (pg_pairs == 0)
                        xritag_start = sglq_entry->sli4_xritag;
                sgl_pg_pairs++;
        }
        bf_set(lpfc_post_sgl_pages_xri, sgl, xritag_start);
        bf_set(lpfc_post_sgl_pages_xricnt, sgl, els_xri_cnt);
        /* Perform endian conversion if necessary */
        sgl->word0 = cpu_to_le32(sgl->word0);

        if (!phba->sli4_hba.intr_enable)
                rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        else {
                mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_SLI4_CONFIG);
                rc = lpfc_sli_issue_mbox_wait(phba, mbox, mbox_tmo);
        }
        shdr = (union lpfc_sli4_cfg_shdr *) &sgl->cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (rc != MBX_TIMEOUT)
                lpfc_sli4_mbox_cmd_free(phba, mbox);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2513 POST_SGL_BLOCK mailbox command failed "
                                "status x%x add_status x%x mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                rc = -ENXIO;
        }
        return rc;
}

/**
 * lpfc_sli4_post_scsi_sgl_block - post a block of scsi sgl list to firmware
 * @phba: pointer to lpfc hba data structure.
 * @sblist: pointer to scsi buffer list.
 * @count: number of scsi buffers on the list.
 *
 * This routine is invoked to post a block of @count scsi sgl pages from a
 * SCSI buffer list @sblist to the HBA using non-embedded mailbox command.
 * No Lock is held.
 *
 **/
int
lpfc_sli4_post_scsi_sgl_block(struct lpfc_hba *phba, struct list_head *sblist,
                              int cnt)
{
        struct lpfc_scsi_buf *psb;
        struct lpfc_mbx_post_uembed_sgl_page1 *sgl;
        struct sgl_page_pairs *sgl_pg_pairs;
        void *viraddr;
        LPFC_MBOXQ_t *mbox;
        uint32_t reqlen, alloclen, pg_pairs;
        uint32_t mbox_tmo;
        uint16_t xritag_start = 0;
        int rc = 0;
        uint32_t shdr_status, shdr_add_status;
        dma_addr_t pdma_phys_bpl1;
        union lpfc_sli4_cfg_shdr *shdr;

        /* Calculate the requested length of the dma memory */
        reqlen = cnt * sizeof(struct sgl_page_pairs) +
                 sizeof(union lpfc_sli4_cfg_shdr) + sizeof(uint32_t);
        if (reqlen > PAGE_SIZE) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "0217 Block sgl registration required DMA "
                                "size (%d) great than a page\n", reqlen);
                return -ENOMEM;
        }
        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0283 Failed to allocate mbox cmd memory\n");
                return -ENOMEM;
        }

        /* Allocate DMA memory and set up the non-embedded mailbox command */
        alloclen = lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                                LPFC_MBOX_OPCODE_FCOE_POST_SGL_PAGES, reqlen,
                                LPFC_SLI4_MBX_NEMBED);

        if (alloclen < reqlen) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2561 Allocated DMA memory size (%d) is "
                                "less than the requested DMA memory "
                                "size (%d)\n", alloclen, reqlen);
                lpfc_sli4_mbox_cmd_free(phba, mbox);
                return -ENOMEM;
        }
        /* Get the first SGE entry from the non-embedded DMA memory */
        viraddr = mbox->sge_array->addr[0];

        /* Set up the SGL pages in the non-embedded DMA pages */
        sgl = (struct lpfc_mbx_post_uembed_sgl_page1 *)viraddr;
        sgl_pg_pairs = &sgl->sgl_pg_pairs;

        pg_pairs = 0;
        list_for_each_entry(psb, sblist, list) {
                /* Set up the sge entry */
                sgl_pg_pairs->sgl_pg0_addr_lo =
                        cpu_to_le32(putPaddrLow(psb->dma_phys_bpl));
                sgl_pg_pairs->sgl_pg0_addr_hi =
                        cpu_to_le32(putPaddrHigh(psb->dma_phys_bpl));
                if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
                        pdma_phys_bpl1 = psb->dma_phys_bpl + SGL_PAGE_SIZE;
                else
                        pdma_phys_bpl1 = 0;
                sgl_pg_pairs->sgl_pg1_addr_lo =
                        cpu_to_le32(putPaddrLow(pdma_phys_bpl1));
                sgl_pg_pairs->sgl_pg1_addr_hi =
                        cpu_to_le32(putPaddrHigh(pdma_phys_bpl1));
                /* Keep the first xritag on the list */
                if (pg_pairs == 0)
                        xritag_start = psb->cur_iocbq.sli4_xritag;
                sgl_pg_pairs++;
                pg_pairs++;
        }
        bf_set(lpfc_post_sgl_pages_xri, sgl, xritag_start);
        bf_set(lpfc_post_sgl_pages_xricnt, sgl, pg_pairs);
        /* Perform endian conversion if necessary */
        sgl->word0 = cpu_to_le32(sgl->word0);

        if (!phba->sli4_hba.intr_enable)
                rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        else {
                mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_SLI4_CONFIG);
                rc = lpfc_sli_issue_mbox_wait(phba, mbox, mbox_tmo);
        }
        shdr = (union lpfc_sli4_cfg_shdr *) &sgl->cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (rc != MBX_TIMEOUT)
                lpfc_sli4_mbox_cmd_free(phba, mbox);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2564 POST_SGL_BLOCK mailbox command failed "
                                "status x%x add_status x%x mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                rc = -ENXIO;
        }
        return rc;
}

/**
 * lpfc_fc_frame_check - Check that this frame is a valid frame to handle
 * @phba: pointer to lpfc_hba struct that the frame was received on
 * @fc_hdr: A pointer to the FC Header data (In Big Endian Format)
 *
 * This function checks the fields in the @fc_hdr to see if the FC frame is a
 * valid type of frame that the LPFC driver will handle. This function will
 * return a zero if the frame is a valid frame or a non zero value when the
 * frame does not pass the check.
 **/
static int
lpfc_fc_frame_check(struct lpfc_hba *phba, struct fc_frame_header *fc_hdr)
{
        char *rctl_names[] = FC_RCTL_NAMES_INIT;
        char *type_names[] = FC_TYPE_NAMES_INIT;
        struct fc_vft_header *fc_vft_hdr;

        switch (fc_hdr->fh_r_ctl) {
        case FC_RCTL_DD_UNCAT:          /* uncategorized information */
        case FC_RCTL_DD_SOL_DATA:       /* solicited data */
        case FC_RCTL_DD_UNSOL_CTL:      /* unsolicited control */
        case FC_RCTL_DD_SOL_CTL:        /* solicited control or reply */
        case FC_RCTL_DD_UNSOL_DATA:     /* unsolicited data */
        case FC_RCTL_DD_DATA_DESC:      /* data descriptor */
        case FC_RCTL_DD_UNSOL_CMD:      /* unsolicited command */
        case FC_RCTL_DD_CMD_STATUS:     /* command status */
        case FC_RCTL_ELS_REQ:   /* extended link services request */
        case FC_RCTL_ELS_REP:   /* extended link services reply */
        case FC_RCTL_ELS4_REQ:  /* FC-4 ELS request */
        case FC_RCTL_ELS4_REP:  /* FC-4 ELS reply */
        case FC_RCTL_BA_NOP:    /* basic link service NOP */
        case FC_RCTL_BA_ABTS:   /* basic link service abort */
        case FC_RCTL_BA_RMC:    /* remove connection */
        case FC_RCTL_BA_ACC:    /* basic accept */
        case FC_RCTL_BA_RJT:    /* basic reject */
        case FC_RCTL_BA_PRMT:
        case FC_RCTL_ACK_1:     /* acknowledge_1 */
        case FC_RCTL_ACK_0:     /* acknowledge_0 */
        case FC_RCTL_P_RJT:     /* port reject */
        case FC_RCTL_F_RJT:     /* fabric reject */
        case FC_RCTL_P_BSY:     /* port busy */
        case FC_RCTL_F_BSY:     /* fabric busy to data frame */
        case FC_RCTL_F_BSYL:    /* fabric busy to link control frame */
        case FC_RCTL_LCR:       /* link credit reset */
        case FC_RCTL_END:       /* end */
                break;
        case FC_RCTL_VFTH:      /* Virtual Fabric tagging Header */
                fc_vft_hdr = (struct fc_vft_header *)fc_hdr;
                fc_hdr = &((struct fc_frame_header *)fc_vft_hdr)[1];
                return lpfc_fc_frame_check(phba, fc_hdr);
        default:
                goto drop;
        }
        switch (fc_hdr->fh_type) {
        case FC_TYPE_BLS:
        case FC_TYPE_ELS:
        case FC_TYPE_FCP:
        case FC_TYPE_CT:
                break;
        case FC_TYPE_IP:
        case FC_TYPE_ILS:
        default:
                goto drop;
        }
        lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
                        "2538 Received frame rctl:%s type:%s\n",
                        rctl_names[fc_hdr->fh_r_ctl],
                        type_names[fc_hdr->fh_type]);
        return 0;
drop:
        lpfc_printf_log(phba, KERN_WARNING, LOG_ELS,
                        "2539 Dropped frame rctl:%s type:%s\n",
                        rctl_names[fc_hdr->fh_r_ctl],
                        type_names[fc_hdr->fh_type]);
        return 1;
}

/**
 * lpfc_fc_hdr_get_vfi - Get the VFI from an FC frame
 * @fc_hdr: A pointer to the FC Header data (In Big Endian Format)
 *
 * This function processes the FC header to retrieve the VFI from the VF
 * header, if one exists. This function will return the VFI if one exists
 * or 0 if no VSAN Header exists.
 **/
static uint32_t
lpfc_fc_hdr_get_vfi(struct fc_frame_header *fc_hdr)
{
        struct fc_vft_header *fc_vft_hdr = (struct fc_vft_header *)fc_hdr;

        if (fc_hdr->fh_r_ctl != FC_RCTL_VFTH)
                return 0;
        return bf_get(fc_vft_hdr_vf_id, fc_vft_hdr);
}

/**
 * lpfc_fc_frame_to_vport - Finds the vport that a frame is destined to
 * @phba: Pointer to the HBA structure to search for the vport on
 * @fc_hdr: A pointer to the FC Header data (In Big Endian Format)
 * @fcfi: The FC Fabric ID that the frame came from
 *
 * This function searches the @phba for a vport that matches the content of the
 * @fc_hdr passed in and the @fcfi. This function uses the @fc_hdr to fetch the
 * VFI, if the Virtual Fabric Tagging Header exists, and the DID. This function
 * returns the matching vport pointer or NULL if unable to match frame to a
 * vport.
 **/
static struct lpfc_vport *
lpfc_fc_frame_to_vport(struct lpfc_hba *phba, struct fc_frame_header *fc_hdr,
                       uint16_t fcfi)
{
        struct lpfc_vport **vports;
        struct lpfc_vport *vport = NULL;
        int i;
        uint32_t did = (fc_hdr->fh_d_id[0] << 16 |
                        fc_hdr->fh_d_id[1] << 8 |
                        fc_hdr->fh_d_id[2]);

        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
                        if (phba->fcf.fcfi == fcfi &&
                            vports[i]->vfi == lpfc_fc_hdr_get_vfi(fc_hdr) &&
                            vports[i]->fc_myDID == did) {
                                vport = vports[i];
                                break;
                        }
                }
        lpfc_destroy_vport_work_array(phba, vports);
        return vport;
}

/**
 * lpfc_update_rcv_time_stamp - Update vport's rcv seq time stamp
 * @vport: The vport to work on.
 *
 * This function updates the receive sequence time stamp for this vport. The
 * receive sequence time stamp indicates the time that the last frame of the
 * the sequence that has been idle for the longest amount of time was received.
 * the driver uses this time stamp to indicate if any received sequences have
 * timed out.
 **/
void
lpfc_update_rcv_time_stamp(struct lpfc_vport *vport)
{
        struct lpfc_dmabuf *h_buf;
        struct hbq_dmabuf *dmabuf = NULL;

        /* get the oldest sequence on the rcv list */
        h_buf = list_get_first(&vport->rcv_buffer_list,
                               struct lpfc_dmabuf, list);
        if (!h_buf)
                return;
        dmabuf = container_of(h_buf, struct hbq_dmabuf, hbuf);
        vport->rcv_buffer_time_stamp = dmabuf->time_stamp;
}

/**
 * lpfc_cleanup_rcv_buffers - Cleans up all outstanding receive sequences.
 * @vport: The vport that the received sequences were sent to.
 *
 * This function cleans up all outstanding received sequences. This is called
 * by the driver when a link event or user action invalidates all the received
 * sequences.
 **/
void
lpfc_cleanup_rcv_buffers(struct lpfc_vport *vport)
{
        struct lpfc_dmabuf *h_buf, *hnext;
        struct lpfc_dmabuf *d_buf, *dnext;
        struct hbq_dmabuf *dmabuf = NULL;

        /* start with the oldest sequence on the rcv list */
        list_for_each_entry_safe(h_buf, hnext, &vport->rcv_buffer_list, list) {
                dmabuf = container_of(h_buf, struct hbq_dmabuf, hbuf);
                list_del_init(&dmabuf->hbuf.list);
                list_for_each_entry_safe(d_buf, dnext,
                                         &dmabuf->dbuf.list, list) {
                        list_del_init(&d_buf->list);
                        lpfc_in_buf_free(vport->phba, d_buf);
                }
                lpfc_in_buf_free(vport->phba, &dmabuf->dbuf);
        }
}

/**
 * lpfc_rcv_seq_check_edtov - Cleans up timed out receive sequences.
 * @vport: The vport that the received sequences were sent to.
 *
 * This function determines whether any received sequences have timed out by
 * first checking the vport's rcv_buffer_time_stamp. If this time_stamp
 * indicates that there is at least one timed out sequence this routine will
 * go through the received sequences one at a time from most inactive to most
 * active to determine which ones need to be cleaned up. Once it has determined
 * that a sequence needs to be cleaned up it will simply free up the resources
 * without sending an abort.
 **/
void
lpfc_rcv_seq_check_edtov(struct lpfc_vport *vport)
{
        struct lpfc_dmabuf *h_buf, *hnext;
        struct lpfc_dmabuf *d_buf, *dnext;
        struct hbq_dmabuf *dmabuf = NULL;
        unsigned long timeout;
        int abort_count = 0;

        timeout = (msecs_to_jiffies(vport->phba->fc_edtov) +
                   vport->rcv_buffer_time_stamp);
        if (list_empty(&vport->rcv_buffer_list) ||
            time_before(jiffies, timeout))
                return;
        /* start with the oldest sequence on the rcv list */
        list_for_each_entry_safe(h_buf, hnext, &vport->rcv_buffer_list, list) {
                dmabuf = container_of(h_buf, struct hbq_dmabuf, hbuf);
                timeout = (msecs_to_jiffies(vport->phba->fc_edtov) +
                           dmabuf->time_stamp);
                if (time_before(jiffies, timeout))
                        break;
                abort_count++;
                list_del_init(&dmabuf->hbuf.list);
                list_for_each_entry_safe(d_buf, dnext,
                                         &dmabuf->dbuf.list, list) {
                        list_del_init(&d_buf->list);
                        lpfc_in_buf_free(vport->phba, d_buf);
                }
                lpfc_in_buf_free(vport->phba, &dmabuf->dbuf);
        }
        if (abort_count)
                lpfc_update_rcv_time_stamp(vport);
}

/**
 * lpfc_fc_frame_add - Adds a frame to the vport's list of received sequences
 * @dmabuf: pointer to a dmabuf that describes the hdr and data of the FC frame
 *
 * This function searches through the existing incomplete sequences that have
 * been sent to this @vport. If the frame matches one of the incomplete
 * sequences then the dbuf in the @dmabuf is added to the list of frames that
 * make up that sequence. If no sequence is found that matches this frame then
 * the function will add the hbuf in the @dmabuf to the @vport's rcv_buffer_list
 * This function returns a pointer to the first dmabuf in the sequence list that
 * the frame was linked to.
 **/
static struct hbq_dmabuf *
lpfc_fc_frame_add(struct lpfc_vport *vport, struct hbq_dmabuf *dmabuf)
{
        struct fc_frame_header *new_hdr;
        struct fc_frame_header *temp_hdr;
        struct lpfc_dmabuf *d_buf;
        struct lpfc_dmabuf *h_buf;
        struct hbq_dmabuf *seq_dmabuf = NULL;
        struct hbq_dmabuf *temp_dmabuf = NULL;

        INIT_LIST_HEAD(&dmabuf->dbuf.list);
        dmabuf->time_stamp = jiffies;
        new_hdr = (struct fc_frame_header *)dmabuf->hbuf.virt;
        /* Use the hdr_buf to find the sequence that this frame belongs to */
        list_for_each_entry(h_buf, &vport->rcv_buffer_list, list) {
                temp_hdr = (struct fc_frame_header *)h_buf->virt;
                if ((temp_hdr->fh_seq_id != new_hdr->fh_seq_id) ||
                    (temp_hdr->fh_ox_id != new_hdr->fh_ox_id) ||
                    (memcmp(&temp_hdr->fh_s_id, &new_hdr->fh_s_id, 3)))
                        continue;
                /* found a pending sequence that matches this frame */
                seq_dmabuf = container_of(h_buf, struct hbq_dmabuf, hbuf);
                break;
        }
        if (!seq_dmabuf) {
                /*
                 * This indicates first frame received for this sequence.
                 * Queue the buffer on the vport's rcv_buffer_list.
                 */
                list_add_tail(&dmabuf->hbuf.list, &vport->rcv_buffer_list);
                lpfc_update_rcv_time_stamp(vport);
                return dmabuf;
        }
        temp_hdr = seq_dmabuf->hbuf.virt;
        if (be16_to_cpu(new_hdr->fh_seq_cnt) <
                be16_to_cpu(temp_hdr->fh_seq_cnt)) {
                list_del_init(&seq_dmabuf->hbuf.list);
                list_add_tail(&dmabuf->hbuf.list, &vport->rcv_buffer_list);
                list_add_tail(&dmabuf->dbuf.list, &seq_dmabuf->dbuf.list);
                lpfc_update_rcv_time_stamp(vport);
                return dmabuf;
        }
        /* move this sequence to the tail to indicate a young sequence */
        list_move_tail(&seq_dmabuf->hbuf.list, &vport->rcv_buffer_list);
        seq_dmabuf->time_stamp = jiffies;
        lpfc_update_rcv_time_stamp(vport);
        if (list_empty(&seq_dmabuf->dbuf.list)) {
                temp_hdr = dmabuf->hbuf.virt;
                list_add_tail(&dmabuf->dbuf.list, &seq_dmabuf->dbuf.list);
                return seq_dmabuf;
        }
        /* find the correct place in the sequence to insert this frame */
        list_for_each_entry_reverse(d_buf, &seq_dmabuf->dbuf.list, list) {
                temp_dmabuf = container_of(d_buf, struct hbq_dmabuf, dbuf);
                temp_hdr = (struct fc_frame_header *)temp_dmabuf->hbuf.virt;
                /*
                 * If the frame's sequence count is greater than the frame on
                 * the list then insert the frame right after this frame
                 */
                if (be16_to_cpu(new_hdr->fh_seq_cnt) >
                        be16_to_cpu(temp_hdr->fh_seq_cnt)) {
                        list_add(&dmabuf->dbuf.list, &temp_dmabuf->dbuf.list);
                        return seq_dmabuf;
                }
        }
        return NULL;
}

/**
 * lpfc_sli4_abort_partial_seq - Abort partially assembled unsol sequence
 * @vport: pointer to a vitural port
 * @dmabuf: pointer to a dmabuf that describes the FC sequence
 *
 * This function tries to abort from the partially assembed sequence, described
 * by the information from basic abbort @dmabuf. It checks to see whether such
 * partially assembled sequence held by the driver. If so, it shall free up all
 * the frames from the partially assembled sequence.
 *
 * Return
 * true  -- if there is matching partially assembled sequence present and all
 *          the frames freed with the sequence;
 * false -- if there is no matching partially assembled sequence present so
 *          nothing got aborted in the lower layer driver
 **/
static bool
lpfc_sli4_abort_partial_seq(struct lpfc_vport *vport,
                            struct hbq_dmabuf *dmabuf)
{
        struct fc_frame_header *new_hdr;
        struct fc_frame_header *temp_hdr;
        struct lpfc_dmabuf *d_buf, *n_buf, *h_buf;
        struct hbq_dmabuf *seq_dmabuf = NULL;

        /* Use the hdr_buf to find the sequence that matches this frame */
        INIT_LIST_HEAD(&dmabuf->dbuf.list);
        INIT_LIST_HEAD(&dmabuf->hbuf.list);
        new_hdr = (struct fc_frame_header *)dmabuf->hbuf.virt;
        list_for_each_entry(h_buf, &vport->rcv_buffer_list, list) {
                temp_hdr = (struct fc_frame_header *)h_buf->virt;
                if ((temp_hdr->fh_seq_id != new_hdr->fh_seq_id) ||
                    (temp_hdr->fh_ox_id != new_hdr->fh_ox_id) ||
                    (memcmp(&temp_hdr->fh_s_id, &new_hdr->fh_s_id, 3)))
                        continue;
                /* found a pending sequence that matches this frame */
                seq_dmabuf = container_of(h_buf, struct hbq_dmabuf, hbuf);
                break;
        }

        /* Free up all the frames from the partially assembled sequence */
        if (seq_dmabuf) {
                list_for_each_entry_safe(d_buf, n_buf,
                                         &seq_dmabuf->dbuf.list, list) {
                        list_del_init(&d_buf->list);
                        lpfc_in_buf_free(vport->phba, d_buf);
                }
                return true;
        }
        return false;
}

/**
 * lpfc_sli4_seq_abort_acc_cmpl - Accept seq abort iocb complete handler
 * @phba: Pointer to HBA context object.
 * @cmd_iocbq: pointer to the command iocbq structure.
 * @rsp_iocbq: pointer to the response iocbq structure.
 *
 * This function handles the sequence abort accept iocb command complete
 * event. It properly releases the memory allocated to the sequence abort
 * accept iocb.
 **/
static void
lpfc_sli4_seq_abort_acc_cmpl(struct lpfc_hba *phba,
                             struct lpfc_iocbq *cmd_iocbq,
                             struct lpfc_iocbq *rsp_iocbq)
{
        if (cmd_iocbq)
                lpfc_sli_release_iocbq(phba, cmd_iocbq);
}

/**
 * lpfc_sli4_seq_abort_acc - Accept sequence abort
 * @phba: Pointer to HBA context object.
 * @fc_hdr: pointer to a FC frame header.
 *
 * This function sends a basic accept to a previous unsol sequence abort
 * event after aborting the sequence handling.
 **/
static void
lpfc_sli4_seq_abort_acc(struct lpfc_hba *phba,
                        struct fc_frame_header *fc_hdr)
{
        struct lpfc_iocbq *ctiocb = NULL;
        struct lpfc_nodelist *ndlp;
        uint16_t oxid, rxid;
        uint32_t sid, fctl;
        IOCB_t *icmd;

        if (!lpfc_is_link_up(phba))
                return;

        sid = sli4_sid_from_fc_hdr(fc_hdr);
        oxid = be16_to_cpu(fc_hdr->fh_ox_id);
        rxid = be16_to_cpu(fc_hdr->fh_rx_id);

        ndlp = lpfc_findnode_did(phba->pport, sid);
        if (!ndlp) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_ELS,
                                "1268 Find ndlp returned NULL for oxid:x%x "
                                "SID:x%x\n", oxid, sid);
                return;
        }

        /* Allocate buffer for acc iocb */
        ctiocb = lpfc_sli_get_iocbq(phba);
        if (!ctiocb)
                return;

        /* Extract the F_CTL field from FC_HDR */
        fctl = sli4_fctl_from_fc_hdr(fc_hdr);

        icmd = &ctiocb->iocb;
        icmd->un.xseq64.bdl.bdeSize = 0;
        icmd->un.xseq64.bdl.ulpIoTag32 = 0;
        icmd->un.xseq64.w5.hcsw.Dfctl = 0;
        icmd->un.xseq64.w5.hcsw.Rctl = FC_RCTL_BA_ACC;
        icmd->un.xseq64.w5.hcsw.Type = FC_TYPE_BLS;

        /* Fill in the rest of iocb fields */
        icmd->ulpCommand = CMD_XMIT_BLS_RSP64_CX;
        icmd->ulpBdeCount = 0;
        icmd->ulpLe = 1;
        icmd->ulpClass = CLASS3;
        icmd->ulpContext = ndlp->nlp_rpi;

        ctiocb->iocb_cmpl = NULL;
        ctiocb->vport = phba->pport;
        ctiocb->iocb_cmpl = lpfc_sli4_seq_abort_acc_cmpl;

        if (fctl & FC_FC_EX_CTX) {
                /* ABTS sent by responder to CT exchange, construction
                 * of BA_ACC will use OX_ID from ABTS for the XRI_TAG
                 * field and RX_ID from ABTS for RX_ID field.
                 */
                bf_set(lpfc_abts_orig, &icmd->un.bls_acc, LPFC_ABTS_UNSOL_RSP);
                bf_set(lpfc_abts_rxid, &icmd->un.bls_acc, rxid);
                ctiocb->sli4_xritag = oxid;
        } else {
                /* ABTS sent by initiator to CT exchange, construction
                 * of BA_ACC will need to allocate a new XRI as for the
                 * XRI_TAG and RX_ID fields.
                 */
                bf_set(lpfc_abts_orig, &icmd->un.bls_acc, LPFC_ABTS_UNSOL_INT);
                bf_set(lpfc_abts_rxid, &icmd->un.bls_acc, NO_XRI);
                ctiocb->sli4_xritag = NO_XRI;
        }
        bf_set(lpfc_abts_oxid, &icmd->un.bls_acc, oxid);

        /* Xmit CT abts accept on exchange <xid> */
        lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
                        "1200 Xmit CT ABTS ACC on exchange x%x Data: x%x\n",
                        CMD_XMIT_BLS_RSP64_CX, phba->link_state);
        lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, ctiocb, 0);
}

/**
 * lpfc_sli4_handle_unsol_abort - Handle sli-4 unsolicited abort event
 * @vport: Pointer to the vport on which this sequence was received
 * @dmabuf: pointer to a dmabuf that describes the FC sequence
 *
 * This function handles an SLI-4 unsolicited abort event. If the unsolicited
 * receive sequence is only partially assembed by the driver, it shall abort
 * the partially assembled frames for the sequence. Otherwise, if the
 * unsolicited receive sequence has been completely assembled and passed to
 * the Upper Layer Protocol (UPL), it then mark the per oxid status for the
 * unsolicited sequence has been aborted. After that, it will issue a basic
 * accept to accept the abort.
 **/
void
lpfc_sli4_handle_unsol_abort(struct lpfc_vport *vport,
                             struct hbq_dmabuf *dmabuf)
{
        struct lpfc_hba *phba = vport->phba;
        struct fc_frame_header fc_hdr;
        uint32_t fctl;
        bool abts_par;

        /* Make a copy of fc_hdr before the dmabuf being released */
        memcpy(&fc_hdr, dmabuf->hbuf.virt, sizeof(struct fc_frame_header));
        fctl = sli4_fctl_from_fc_hdr(&fc_hdr);

        if (fctl & FC_FC_EX_CTX) {
                /*
                 * ABTS sent by responder to exchange, just free the buffer
                 */
                lpfc_in_buf_free(phba, &dmabuf->dbuf);
        } else {
                /*
                 * ABTS sent by initiator to exchange, need to do cleanup
                 */
                /* Try to abort partially assembled seq */
                abts_par = lpfc_sli4_abort_partial_seq(vport, dmabuf);

                /* Send abort to ULP if partially seq abort failed */
                if (abts_par == false)
                        lpfc_sli4_send_seq_to_ulp(vport, dmabuf);
                else
                        lpfc_in_buf_free(phba, &dmabuf->dbuf);
        }
        /* Send basic accept (BA_ACC) to the abort requester */
        lpfc_sli4_seq_abort_acc(phba, &fc_hdr);
}

/**
 * lpfc_seq_complete - Indicates if a sequence is complete
 * @dmabuf: pointer to a dmabuf that describes the FC sequence
 *
 * This function checks the sequence, starting with the frame described by
 * @dmabuf, to see if all the frames associated with this sequence are present.
 * the frames associated with this sequence are linked to the @dmabuf using the
 * dbuf list. This function looks for two major things. 1) That the first frame
 * has a sequence count of zero. 2) There is a frame with last frame of sequence
 * set. 3) That there are no holes in the sequence count. The function will
 * return 1 when the sequence is complete, otherwise it will return 0.
 **/
static int
lpfc_seq_complete(struct hbq_dmabuf *dmabuf)
{
        struct fc_frame_header *hdr;
        struct lpfc_dmabuf *d_buf;
        struct hbq_dmabuf *seq_dmabuf;
        uint32_t fctl;
        int seq_count = 0;

        hdr = (struct fc_frame_header *)dmabuf->hbuf.virt;
        /* make sure first fame of sequence has a sequence count of zero */
        if (hdr->fh_seq_cnt != seq_count)
                return 0;
        fctl = (hdr->fh_f_ctl[0] << 16 |
                hdr->fh_f_ctl[1] << 8 |
                hdr->fh_f_ctl[2]);
        /* If last frame of sequence we can return success. */
        if (fctl & FC_FC_END_SEQ)
                return 1;
        list_for_each_entry(d_buf, &dmabuf->dbuf.list, list) {
                seq_dmabuf = container_of(d_buf, struct hbq_dmabuf, dbuf);
                hdr = (struct fc_frame_header *)seq_dmabuf->hbuf.virt;
                /* If there is a hole in the sequence count then fail. */
                if (++seq_count != be16_to_cpu(hdr->fh_seq_cnt))
                        return 0;
                fctl = (hdr->fh_f_ctl[0] << 16 |
                        hdr->fh_f_ctl[1] << 8 |
                        hdr->fh_f_ctl[2]);
                /* If last frame of sequence we can return success. */
                if (fctl & FC_FC_END_SEQ)
                        return 1;
        }
        return 0;
}

/**
 * lpfc_prep_seq - Prep sequence for ULP processing
 * @vport: Pointer to the vport on which this sequence was received
 * @dmabuf: pointer to a dmabuf that describes the FC sequence
 *
 * This function takes a sequence, described by a list of frames, and creates
 * a list of iocbq structures to describe the sequence. This iocbq list will be
 * used to issue to the generic unsolicited sequence handler. This routine
 * returns a pointer to the first iocbq in the list. If the function is unable
 * to allocate an iocbq then it throw out the received frames that were not
 * able to be described and return a pointer to the first iocbq. If unable to
 * allocate any iocbqs (including the first) this function will return NULL.
 **/
static struct lpfc_iocbq *
lpfc_prep_seq(struct lpfc_vport *vport, struct hbq_dmabuf *seq_dmabuf)
{
        struct lpfc_dmabuf *d_buf, *n_buf;
        struct lpfc_iocbq *first_iocbq, *iocbq;
        struct fc_frame_header *fc_hdr;
        uint32_t sid;
        struct ulp_bde64 *pbde;

        fc_hdr = (struct fc_frame_header *)seq_dmabuf->hbuf.virt;
        /* remove from receive buffer list */
        list_del_init(&seq_dmabuf->hbuf.list);
        lpfc_update_rcv_time_stamp(vport);
        /* get the Remote Port's SID */
        sid = sli4_sid_from_fc_hdr(fc_hdr);
        /* Get an iocbq struct to fill in. */
        first_iocbq = lpfc_sli_get_iocbq(vport->phba);
        if (first_iocbq) {
                /* Initialize the first IOCB. */
                first_iocbq->iocb.unsli3.rcvsli3.acc_len = 0;
                first_iocbq->iocb.ulpStatus = IOSTAT_SUCCESS;
                first_iocbq->iocb.ulpCommand = CMD_IOCB_RCV_SEQ64_CX;
                first_iocbq->iocb.ulpContext = be16_to_cpu(fc_hdr->fh_ox_id);
                first_iocbq->iocb.unsli3.rcvsli3.vpi =
                                        vport->vpi + vport->phba->vpi_base;
                /* put the first buffer into the first IOCBq */
                first_iocbq->context2 = &seq_dmabuf->dbuf;
                first_iocbq->context3 = NULL;
                first_iocbq->iocb.ulpBdeCount = 1;
                first_iocbq->iocb.un.cont64[0].tus.f.bdeSize =
                                                        LPFC_DATA_BUF_SIZE;
                first_iocbq->iocb.un.rcvels.remoteID = sid;
                first_iocbq->iocb.unsli3.rcvsli3.acc_len +=
                                bf_get(lpfc_rcqe_length,
                                       &seq_dmabuf->cq_event.cqe.rcqe_cmpl);
        }
        iocbq = first_iocbq;
        /*
         * Each IOCBq can have two Buffers assigned, so go through the list
         * of buffers for this sequence and save two buffers in each IOCBq
         */
        list_for_each_entry_safe(d_buf, n_buf, &seq_dmabuf->dbuf.list, list) {
                if (!iocbq) {
                        lpfc_in_buf_free(vport->phba, d_buf);
                        continue;
                }
                if (!iocbq->context3) {
                        iocbq->context3 = d_buf;
                        iocbq->iocb.ulpBdeCount++;
                        pbde = (struct ulp_bde64 *)
                                        &iocbq->iocb.unsli3.sli3Words[4];
                        pbde->tus.f.bdeSize = LPFC_DATA_BUF_SIZE;
                        first_iocbq->iocb.unsli3.rcvsli3.acc_len +=
                                bf_get(lpfc_rcqe_length,
                                       &seq_dmabuf->cq_event.cqe.rcqe_cmpl);
                } else {
                        iocbq = lpfc_sli_get_iocbq(vport->phba);
                        if (!iocbq) {
                                if (first_iocbq) {
                                        first_iocbq->iocb.ulpStatus =
                                                        IOSTAT_FCP_RSP_ERROR;
                                        first_iocbq->iocb.un.ulpWord[4] =
                                                        IOERR_NO_RESOURCES;
                                }
                                lpfc_in_buf_free(vport->phba, d_buf);
                                continue;
                        }
                        iocbq->context2 = d_buf;
                        iocbq->context3 = NULL;
                        iocbq->iocb.ulpBdeCount = 1;
                        iocbq->iocb.un.cont64[0].tus.f.bdeSize =
                                                        LPFC_DATA_BUF_SIZE;
                        first_iocbq->iocb.unsli3.rcvsli3.acc_len +=
                                bf_get(lpfc_rcqe_length,
                                       &seq_dmabuf->cq_event.cqe.rcqe_cmpl);
                        iocbq->iocb.un.rcvels.remoteID = sid;
                        list_add_tail(&iocbq->list, &first_iocbq->list);
                }
        }
        return first_iocbq;
}

static void
lpfc_sli4_send_seq_to_ulp(struct lpfc_vport *vport,
                          struct hbq_dmabuf *seq_dmabuf)
{
        struct fc_frame_header *fc_hdr;
        struct lpfc_iocbq *iocbq, *curr_iocb, *next_iocb;
        struct lpfc_hba *phba = vport->phba;

        fc_hdr = (struct fc_frame_header *)seq_dmabuf->hbuf.virt;
        iocbq = lpfc_prep_seq(vport, seq_dmabuf);
        if (!iocbq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2707 Ring %d handler: Failed to allocate "
                                "iocb Rctl x%x Type x%x received\n",
                                LPFC_ELS_RING,
                                fc_hdr->fh_r_ctl, fc_hdr->fh_type);
                return;
        }
        if (!lpfc_complete_unsol_iocb(phba,
                                      &phba->sli.ring[LPFC_ELS_RING],
                                      iocbq, fc_hdr->fh_r_ctl,
                                      fc_hdr->fh_type))
                lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
                                "2540 Ring %d handler: unexpected Rctl "
                                "x%x Type x%x received\n",
                                LPFC_ELS_RING,
                                fc_hdr->fh_r_ctl, fc_hdr->fh_type);

        /* Free iocb created in lpfc_prep_seq */
        list_for_each_entry_safe(curr_iocb, next_iocb,
                &iocbq->list, list) {
                list_del_init(&curr_iocb->list);
                lpfc_sli_release_iocbq(phba, curr_iocb);
        }
        lpfc_sli_release_iocbq(phba, iocbq);
}

/**
 * lpfc_sli4_handle_received_buffer - Handle received buffers from firmware
 * @phba: Pointer to HBA context object.
 *
 * This function is called with no lock held. This function processes all
 * the received buffers and gives it to upper layers when a received buffer
 * indicates that it is the final frame in the sequence. The interrupt
 * service routine processes received buffers at interrupt contexts and adds
 * received dma buffers to the rb_pend_list queue and signals the worker thread.
 * Worker thread calls lpfc_sli4_handle_received_buffer, which will call the
 * appropriate receive function when the final frame in a sequence is received.
 **/
void
lpfc_sli4_handle_received_buffer(struct lpfc_hba *phba,
                                 struct hbq_dmabuf *dmabuf)
{
        struct hbq_dmabuf *seq_dmabuf;
        struct fc_frame_header *fc_hdr;
        struct lpfc_vport *vport;
        uint32_t fcfi;

        /* Process each received buffer */
        fc_hdr = (struct fc_frame_header *)dmabuf->hbuf.virt;
        /* check to see if this a valid type of frame */
        if (lpfc_fc_frame_check(phba, fc_hdr)) {
                lpfc_in_buf_free(phba, &dmabuf->dbuf);
                return;
        }
        fcfi = bf_get(lpfc_rcqe_fcf_id, &dmabuf->cq_event.cqe.rcqe_cmpl);
        vport = lpfc_fc_frame_to_vport(phba, fc_hdr, fcfi);
        if (!vport || !(vport->vpi_state & LPFC_VPI_REGISTERED)) {
                /* throw out the frame */
                lpfc_in_buf_free(phba, &dmabuf->dbuf);
                return;
        }
        /* Handle the basic abort sequence (BA_ABTS) event */
        if (fc_hdr->fh_r_ctl == FC_RCTL_BA_ABTS) {
                lpfc_sli4_handle_unsol_abort(vport, dmabuf);
                return;
        }

        /* Link this frame */
        seq_dmabuf = lpfc_fc_frame_add(vport, dmabuf);
        if (!seq_dmabuf) {
                /* unable to add frame to vport - throw it out */
                lpfc_in_buf_free(phba, &dmabuf->dbuf);
                return;
        }
        /* If not last frame in sequence continue processing frames. */
        if (!lpfc_seq_complete(seq_dmabuf))
                return;

        /* Send the complete sequence to the upper layer protocol */
        lpfc_sli4_send_seq_to_ulp(vport, seq_dmabuf);
}

/**
 * lpfc_sli4_post_all_rpi_hdrs - Post the rpi header memory region to the port
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to post rpi header templates to the
 * HBA consistent with the SLI-4 interface spec.  This routine
 * posts a PAGE_SIZE memory region to the port to hold up to
 * PAGE_SIZE modulo 64 rpi context headers.
 *
 * This routine does not require any locks.  It's usage is expected
 * to be driver load or reset recovery when the driver is
 * sequential.
 *
 * Return codes
 *      0 - successful
 *      EIO - The mailbox failed to complete successfully.
 *      When this error occurs, the driver is not guaranteed
 *      to have any rpi regions posted to the device and
 *      must either attempt to repost the regions or take a
 *      fatal error.
 **/
int
lpfc_sli4_post_all_rpi_hdrs(struct lpfc_hba *phba)
{
        struct lpfc_rpi_hdr *rpi_page;
        uint32_t rc = 0;

        /* Post all rpi memory regions to the port. */
        list_for_each_entry(rpi_page, &phba->sli4_hba.lpfc_rpi_hdr_list, list) {
                rc = lpfc_sli4_post_rpi_hdr(phba, rpi_page);
                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                        "2008 Error %d posting all rpi "
                                        "headers\n", rc);
                        rc = -EIO;
                        break;
                }
        }

        return rc;
}

/**
 * lpfc_sli4_post_rpi_hdr - Post an rpi header memory region to the port
 * @phba: pointer to lpfc hba data structure.
 * @rpi_page:  pointer to the rpi memory region.
 *
 * This routine is invoked to post a single rpi header to the
 * HBA consistent with the SLI-4 interface spec.  This memory region
 * maps up to 64 rpi context regions.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No available memory
 *      EIO - The mailbox failed to complete successfully.
 **/
int
lpfc_sli4_post_rpi_hdr(struct lpfc_hba *phba, struct lpfc_rpi_hdr *rpi_page)
{
        LPFC_MBOXQ_t *mboxq;
        struct lpfc_mbx_post_hdr_tmpl *hdr_tmpl;
        uint32_t rc = 0;
        uint32_t mbox_tmo;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        /* The port is notified of the header region via a mailbox command. */
        mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2001 Unable to allocate memory for issuing "
                                "SLI_CONFIG_SPECIAL mailbox command\n");
                return -ENOMEM;
        }

        /* Post all rpi memory regions to the port. */
        hdr_tmpl = &mboxq->u.mqe.un.hdr_tmpl;
        mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_SLI4_CONFIG);
        lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_POST_HDR_TEMPLATE,
                         sizeof(struct lpfc_mbx_post_hdr_tmpl) -
                         sizeof(struct mbox_header), LPFC_SLI4_MBX_EMBED);
        bf_set(lpfc_mbx_post_hdr_tmpl_page_cnt,
               hdr_tmpl, rpi_page->page_count);
        bf_set(lpfc_mbx_post_hdr_tmpl_rpi_offset, hdr_tmpl,
               rpi_page->start_rpi);
        hdr_tmpl->rpi_paddr_lo = putPaddrLow(rpi_page->dmabuf->phys);
        hdr_tmpl->rpi_paddr_hi = putPaddrHigh(rpi_page->dmabuf->phys);
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        shdr = (union lpfc_sli4_cfg_shdr *) &hdr_tmpl->header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (rc != MBX_TIMEOUT)
                mempool_free(mboxq, phba->mbox_mem_pool);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2514 POST_RPI_HDR mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                rc = -ENXIO;
        }
        return rc;
}

/**
 * lpfc_sli4_alloc_rpi - Get an available rpi in the device's range
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to post rpi header templates to the
 * HBA consistent with the SLI-4 interface spec.  This routine
 * posts a PAGE_SIZE memory region to the port to hold up to
 * PAGE_SIZE modulo 64 rpi context headers.
 *
 * Returns
 *      A nonzero rpi defined as rpi_base <= rpi < max_rpi if successful
 *      LPFC_RPI_ALLOC_ERROR if no rpis are available.
 **/
int
lpfc_sli4_alloc_rpi(struct lpfc_hba *phba)
{
        int rpi;
        uint16_t max_rpi, rpi_base, rpi_limit;
        uint16_t rpi_remaining;
        struct lpfc_rpi_hdr *rpi_hdr;

        max_rpi = phba->sli4_hba.max_cfg_param.max_rpi;
        rpi_base = phba->sli4_hba.max_cfg_param.rpi_base;
        rpi_limit = phba->sli4_hba.next_rpi;

        /*
         * The valid rpi range is not guaranteed to be zero-based.  Start
         * the search at the rpi_base as reported by the port.
         */
        spin_lock_irq(&phba->hbalock);
        rpi = find_next_zero_bit(phba->sli4_hba.rpi_bmask, rpi_limit, rpi_base);
        if (rpi >= rpi_limit || rpi < rpi_base)
                rpi = LPFC_RPI_ALLOC_ERROR;
        else {
                set_bit(rpi, phba->sli4_hba.rpi_bmask);
                phba->sli4_hba.max_cfg_param.rpi_used++;
                phba->sli4_hba.rpi_count++;
        }

        /*
         * Don't try to allocate more rpi header regions if the device limit
         * on available rpis max has been exhausted.
         */
        if ((rpi == LPFC_RPI_ALLOC_ERROR) &&
            (phba->sli4_hba.rpi_count >= max_rpi)) {
                spin_unlock_irq(&phba->hbalock);
                return rpi;
        }

        /*
         * If the driver is running low on rpi resources, allocate another
         * page now.  Note that the next_rpi value is used because
         * it represents how many are actually in use whereas max_rpi notes
         * how many are supported max by the device.
         */
        rpi_remaining = phba->sli4_hba.next_rpi - rpi_base -
                phba->sli4_hba.rpi_count;
        spin_unlock_irq(&phba->hbalock);
        if (rpi_remaining < LPFC_RPI_LOW_WATER_MARK) {
                rpi_hdr = lpfc_sli4_create_rpi_hdr(phba);
                if (!rpi_hdr) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                        "2002 Error Could not grow rpi "
                                        "count\n");
                } else {
                        lpfc_sli4_post_rpi_hdr(phba, rpi_hdr);
                }
        }

        return rpi;
}

/**
 * lpfc_sli4_free_rpi - Release an rpi for reuse.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to release an rpi to the pool of
 * available rpis maintained by the driver.
 **/
void
lpfc_sli4_free_rpi(struct lpfc_hba *phba, int rpi)
{
        spin_lock_irq(&phba->hbalock);
        clear_bit(rpi, phba->sli4_hba.rpi_bmask);
        phba->sli4_hba.rpi_count--;
        phba->sli4_hba.max_cfg_param.rpi_used--;
        spin_unlock_irq(&phba->hbalock);
}

/**
 * lpfc_sli4_remove_rpis - Remove the rpi bitmask region
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to remove the memory region that
 * provided rpi via a bitmask.
 **/
void
lpfc_sli4_remove_rpis(struct lpfc_hba *phba)
{
        kfree(phba->sli4_hba.rpi_bmask);
}

/**
 * lpfc_sli4_resume_rpi - Remove the rpi bitmask region
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to remove the memory region that
 * provided rpi via a bitmask.
 **/
int
lpfc_sli4_resume_rpi(struct lpfc_nodelist *ndlp)
{
        LPFC_MBOXQ_t *mboxq;
        struct lpfc_hba *phba = ndlp->phba;
        int rc;

        /* The port is notified of the header region via a mailbox command. */
        mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq)
                return -ENOMEM;

        /* Post all rpi memory regions to the port. */
        lpfc_resume_rpi(mboxq, ndlp);
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
        if (rc == MBX_NOT_FINISHED) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2010 Resume RPI Mailbox failed "
                                "status %d, mbxStatus x%x\n", rc,
                                bf_get(lpfc_mqe_status, &mboxq->u.mqe));
                mempool_free(mboxq, phba->mbox_mem_pool);
                return -EIO;
        }
        return 0;
}

/**
 * lpfc_sli4_init_vpi - Initialize a vpi with the port
 * @phba: pointer to lpfc hba data structure.
 * @vpi: vpi value to activate with the port.
 *
 * This routine is invoked to activate a vpi with the
 * port when the host intends to use vports with a
 * nonzero vpi.
 *
 * Returns:
 *    0 success
 *    -Evalue otherwise
 **/
int
lpfc_sli4_init_vpi(struct lpfc_hba *phba, uint16_t vpi)
{
        LPFC_MBOXQ_t *mboxq;
        int rc = 0;
        int retval = MBX_SUCCESS;
        uint32_t mbox_tmo;

        if (vpi == 0)
                return -EINVAL;
        mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq)
                return -ENOMEM;
        lpfc_init_vpi(phba, mboxq, vpi);
        mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_INIT_VPI);
        rc = lpfc_sli_issue_mbox_wait(phba, mboxq, mbox_tmo);
        if (rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2022 INIT VPI Mailbox failed "
                                "status %d, mbxStatus x%x\n", rc,
                                bf_get(lpfc_mqe_status, &mboxq->u.mqe));
                retval = -EIO;
        }
        if (rc != MBX_TIMEOUT)
                mempool_free(mboxq, phba->mbox_mem_pool);

        return retval;
}

/**
 * lpfc_mbx_cmpl_add_fcf_record - add fcf mbox completion handler.
 * @phba: pointer to lpfc hba data structure.
 * @mboxq: Pointer to mailbox object.
 *
 * This routine is invoked to manually add a single FCF record. The caller
 * must pass a completely initialized FCF_Record.  This routine takes
 * care of the nonembedded mailbox operations.
 **/
static void
lpfc_mbx_cmpl_add_fcf_record(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        void *virt_addr;
        union lpfc_sli4_cfg_shdr *shdr;
        uint32_t shdr_status, shdr_add_status;

        virt_addr = mboxq->sge_array->addr[0];
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr = (union lpfc_sli4_cfg_shdr *) virt_addr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);

        if ((shdr_status || shdr_add_status) &&
                (shdr_status != STATUS_FCF_IN_USE))
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2558 ADD_FCF_RECORD mailbox failed with "
                        "status x%x add_status x%x\n",
                        shdr_status, shdr_add_status);

        lpfc_sli4_mbox_cmd_free(phba, mboxq);
}

/**
 * lpfc_sli4_add_fcf_record - Manually add an FCF Record.
 * @phba: pointer to lpfc hba data structure.
 * @fcf_record:  pointer to the initialized fcf record to add.
 *
 * This routine is invoked to manually add a single FCF record. The caller
 * must pass a completely initialized FCF_Record.  This routine takes
 * care of the nonembedded mailbox operations.
 **/
int
lpfc_sli4_add_fcf_record(struct lpfc_hba *phba, struct fcf_record *fcf_record)
{
        int rc = 0;
        LPFC_MBOXQ_t *mboxq;
        uint8_t *bytep;
        void *virt_addr;
        dma_addr_t phys_addr;
        struct lpfc_mbx_sge sge;
        uint32_t alloc_len, req_len;
        uint32_t fcfindex;

        mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2009 Failed to allocate mbox for ADD_FCF cmd\n");
                return -ENOMEM;
        }

        req_len = sizeof(struct fcf_record) + sizeof(union lpfc_sli4_cfg_shdr) +
                  sizeof(uint32_t);

        /* Allocate DMA memory and set up the non-embedded mailbox command */
        alloc_len = lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_FCOE,
                                     LPFC_MBOX_OPCODE_FCOE_ADD_FCF,
                                     req_len, LPFC_SLI4_MBX_NEMBED);
        if (alloc_len < req_len) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2523 Allocated DMA memory size (x%x) is "
                        "less than the requested DMA memory "
                        "size (x%x)\n", alloc_len, req_len);
                lpfc_sli4_mbox_cmd_free(phba, mboxq);
                return -ENOMEM;
        }

        /*
         * Get the first SGE entry from the non-embedded DMA memory.  This
         * routine only uses a single SGE.
         */
        lpfc_sli4_mbx_sge_get(mboxq, 0, &sge);
        phys_addr = getPaddr(sge.pa_hi, sge.pa_lo);
        virt_addr = mboxq->sge_array->addr[0];
        /*
         * Configure the FCF record for FCFI 0.  This is the driver's
         * hardcoded default and gets used in nonFIP mode.
         */
        fcfindex = bf_get(lpfc_fcf_record_fcf_index, fcf_record);
        bytep = virt_addr + sizeof(union lpfc_sli4_cfg_shdr);
        lpfc_sli_pcimem_bcopy(&fcfindex, bytep, sizeof(uint32_t));

        /*
         * Copy the fcf_index and the FCF Record Data. The data starts after
         * the FCoE header plus word10. The data copy needs to be endian
         * correct.
         */
        bytep += sizeof(uint32_t);
        lpfc_sli_pcimem_bcopy(fcf_record, bytep, sizeof(struct fcf_record));
        mboxq->vport = phba->pport;
        mboxq->mbox_cmpl = lpfc_mbx_cmpl_add_fcf_record;
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
        if (rc == MBX_NOT_FINISHED) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2515 ADD_FCF_RECORD mailbox failed with "
                        "status 0x%x\n", rc);
                lpfc_sli4_mbox_cmd_free(phba, mboxq);
                rc = -EIO;
        } else
                rc = 0;

        return rc;
}

/**
 * lpfc_sli4_build_dflt_fcf_record - Build the driver's default FCF Record.
 * @phba: pointer to lpfc hba data structure.
 * @fcf_record:  pointer to the fcf record to write the default data.
 * @fcf_index: FCF table entry index.
 *
 * This routine is invoked to build the driver's default FCF record.  The
 * values used are hardcoded.  This routine handles memory initialization.
 *
 **/
void
lpfc_sli4_build_dflt_fcf_record(struct lpfc_hba *phba,
                                struct fcf_record *fcf_record,
                                uint16_t fcf_index)
{
        memset(fcf_record, 0, sizeof(struct fcf_record));
        fcf_record->max_rcv_size = LPFC_FCOE_MAX_RCV_SIZE;
        fcf_record->fka_adv_period = LPFC_FCOE_FKA_ADV_PER;
        fcf_record->fip_priority = LPFC_FCOE_FIP_PRIORITY;
        bf_set(lpfc_fcf_record_mac_0, fcf_record, phba->fc_map[0]);
        bf_set(lpfc_fcf_record_mac_1, fcf_record, phba->fc_map[1]);
        bf_set(lpfc_fcf_record_mac_2, fcf_record, phba->fc_map[2]);
        bf_set(lpfc_fcf_record_mac_3, fcf_record, LPFC_FCOE_FCF_MAC3);
        bf_set(lpfc_fcf_record_mac_4, fcf_record, LPFC_FCOE_FCF_MAC4);
        bf_set(lpfc_fcf_record_mac_5, fcf_record, LPFC_FCOE_FCF_MAC5);
        bf_set(lpfc_fcf_record_fc_map_0, fcf_record, phba->fc_map[0]);
        bf_set(lpfc_fcf_record_fc_map_1, fcf_record, phba->fc_map[1]);
        bf_set(lpfc_fcf_record_fc_map_2, fcf_record, phba->fc_map[2]);
        bf_set(lpfc_fcf_record_fcf_valid, fcf_record, 1);
        bf_set(lpfc_fcf_record_fcf_avail, fcf_record, 1);
        bf_set(lpfc_fcf_record_fcf_index, fcf_record, fcf_index);
        bf_set(lpfc_fcf_record_mac_addr_prov, fcf_record,
                LPFC_FCF_FPMA | LPFC_FCF_SPMA);
        /* Set the VLAN bit map */
        if (phba->valid_vlan) {
                fcf_record->vlan_bitmap[phba->vlan_id / 8]
                        = 1 << (phba->vlan_id % 8);
        }
}

/**
 * lpfc_sli4_read_fcf_record - Read the driver's default FCF Record.
 * @phba: pointer to lpfc hba data structure.
 * @fcf_index: FCF table entry offset.
 *
 * This routine is invoked to read up to @fcf_num of FCF record from the
 * device starting with the given @fcf_index.
 **/
int
lpfc_sli4_read_fcf_record(struct lpfc_hba *phba, uint16_t fcf_index)
{
        int rc = 0, error;
        LPFC_MBOXQ_t *mboxq;

        phba->fcoe_eventtag_at_fcf_scan = phba->fcoe_eventtag;
        mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2000 Failed to allocate mbox for "
                                "READ_FCF cmd\n");
                error = -ENOMEM;
                goto fail_fcfscan;
        }
        /* Construct the read FCF record mailbox command */
        rc = lpfc_sli4_mbx_read_fcf_record(phba, mboxq, fcf_index);
        if (rc) {
                error = -EINVAL;
                goto fail_fcfscan;
        }
        /* Issue the mailbox command asynchronously */
        mboxq->vport = phba->pport;
        mboxq->mbox_cmpl = lpfc_mbx_cmpl_read_fcf_record;
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
        if (rc == MBX_NOT_FINISHED)
                error = -EIO;
        else {
                spin_lock_irq(&phba->hbalock);
                phba->hba_flag |= FCF_DISC_INPROGRESS;
                spin_unlock_irq(&phba->hbalock);
                error = 0;
        }
fail_fcfscan:
        if (error) {
                if (mboxq)
                        lpfc_sli4_mbox_cmd_free(phba, mboxq);
                /* FCF scan failed, clear FCF_DISC_INPROGRESS flag */
                spin_lock_irq(&phba->hbalock);
                phba->hba_flag &= ~FCF_DISC_INPROGRESS;
                spin_unlock_irq(&phba->hbalock);
        }
        return error;
}

/**
 * lpfc_mbx_cmpl_redisc_fcf_table - completion routine for rediscover FCF table
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is the completion routine for the rediscover FCF table mailbox
 * command. If the mailbox command returned failure, it will try to stop the
 * FCF rediscover wait timer.
 **/
void
lpfc_mbx_cmpl_redisc_fcf_table(struct lpfc_hba *phba, LPFC_MBOXQ_t *mbox)
{
        struct lpfc_mbx_redisc_fcf_tbl *redisc_fcf;
        uint32_t shdr_status, shdr_add_status;

        redisc_fcf = &mbox->u.mqe.un.redisc_fcf_tbl;

        shdr_status = bf_get(lpfc_mbox_hdr_status,
                             &redisc_fcf->header.cfg_shdr.response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status,
                             &redisc_fcf->header.cfg_shdr.response);
        if (shdr_status || shdr_add_status) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2746 Requesting for FCF rediscovery failed "
                                "status x%x add_status x%x\n",
                                shdr_status, shdr_add_status);
                /*
                 * Request failed, last resort to re-try current
                 * registered FCF entry
                 */
                lpfc_retry_pport_discovery(phba);
        } else
                /*
                 * Start FCF rediscovery wait timer for pending FCF
                 * before rescan FCF record table.
                 */
                lpfc_fcf_redisc_wait_start_timer(phba);

        mempool_free(mbox, phba->mbox_mem_pool);
}

/**
 * lpfc_sli4_redisc_all_fcf - Request to rediscover entire FCF table by port.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to request for rediscovery of the entire FCF table
 * by the port.
 **/
int
lpfc_sli4_redisc_fcf_table(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *mbox;
        struct lpfc_mbx_redisc_fcf_tbl *redisc_fcf;
        int rc, length;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2745 Failed to allocate mbox for "
                                "requesting FCF rediscover.\n");
                return -ENOMEM;
        }

        length = (sizeof(struct lpfc_mbx_redisc_fcf_tbl) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_REDISCOVER_FCF,
                         length, LPFC_SLI4_MBX_EMBED);

        redisc_fcf = &mbox->u.mqe.un.redisc_fcf_tbl;
        /* Set count to 0 for invalidating the entire FCF database */
        bf_set(lpfc_mbx_redisc_fcf_count, redisc_fcf, 0);

        /* Issue the mailbox command asynchronously */
        mbox->vport = phba->pport;
        mbox->mbox_cmpl = lpfc_mbx_cmpl_redisc_fcf_table;
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);

        if (rc == MBX_NOT_FINISHED) {
                mempool_free(mbox, phba->mbox_mem_pool);
                return -EIO;
        }
        return 0;
}

/**
 * lpfc_sli_read_link_ste - Read region 23 to decide if link is disabled.
 * @phba: pointer to lpfc hba data structure.
 *
 * This function read region 23 and parse TLV for port status to
 * decide if the user disaled the port. If the TLV indicates the
 * port is disabled, the hba_flag is set accordingly.
 **/
void
lpfc_sli_read_link_ste(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *pmb = NULL;
        MAILBOX_t *mb;
        uint8_t *rgn23_data = NULL;
        uint32_t offset = 0, data_size, sub_tlv_len, tlv_offset;
        int rc;

        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2600 lpfc_sli_read_serdes_param failed to"
                        " allocate mailbox memory\n");
                goto out;
        }
        mb = &pmb->u.mb;

        /* Get adapter Region 23 data */
        rgn23_data = kzalloc(DMP_RGN23_SIZE, GFP_KERNEL);
        if (!rgn23_data)
                goto out;

        do {
                lpfc_dump_mem(phba, pmb, offset, DMP_REGION_23);
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);

                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "2601 lpfc_sli_read_link_ste failed to"
                                " read config region 23 rc 0x%x Status 0x%x\n",
                                rc, mb->mbxStatus);
                        mb->un.varDmp.word_cnt = 0;
                }
                /*
                 * dump mem may return a zero when finished or we got a
                 * mailbox error, either way we are done.
                 */
                if (mb->un.varDmp.word_cnt == 0)
                        break;
                if (mb->un.varDmp.word_cnt > DMP_RGN23_SIZE - offset)
                        mb->un.varDmp.word_cnt = DMP_RGN23_SIZE - offset;

                lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET,
                        rgn23_data + offset,
                        mb->un.varDmp.word_cnt);
                offset += mb->un.varDmp.word_cnt;
        } while (mb->un.varDmp.word_cnt && offset < DMP_RGN23_SIZE);

        data_size = offset;
        offset = 0;

        if (!data_size)
                goto out;

        /* Check the region signature first */
        if (memcmp(&rgn23_data[offset], LPFC_REGION23_SIGNATURE, 4)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2619 Config region 23 has bad signature\n");
                        goto out;
        }
        offset += 4;

        /* Check the data structure version */
        if (rgn23_data[offset] != LPFC_REGION23_VERSION) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2620 Config region 23 has bad version\n");
                goto out;
        }
        offset += 4;

        /* Parse TLV entries in the region */
        while (offset < data_size) {
                if (rgn23_data[offset] == LPFC_REGION23_LAST_REC)
                        break;
                /*
                 * If the TLV is not driver specific TLV or driver id is
                 * not linux driver id, skip the record.
                 */
                if ((rgn23_data[offset] != DRIVER_SPECIFIC_TYPE) ||
                    (rgn23_data[offset + 2] != LINUX_DRIVER_ID) ||
                    (rgn23_data[offset + 3] != 0)) {
                        offset += rgn23_data[offset + 1] * 4 + 4;
                        continue;
                }

                /* Driver found a driver specific TLV in the config region */
                sub_tlv_len = rgn23_data[offset + 1] * 4;
                offset += 4;
                tlv_offset = 0;

                /*
                 * Search for configured port state sub-TLV.
                 */
                while ((offset < data_size) &&
                        (tlv_offset < sub_tlv_len)) {
                        if (rgn23_data[offset] == LPFC_REGION23_LAST_REC) {
                                offset += 4;
                                tlv_offset += 4;
                                break;
                        }
                        if (rgn23_data[offset] != PORT_STE_TYPE) {
                                offset += rgn23_data[offset + 1] * 4 + 4;
                                tlv_offset += rgn23_data[offset + 1] * 4 + 4;
                                continue;
                        }

                        /* This HBA contains PORT_STE configured */
                        if (!rgn23_data[offset + 2])
                                phba->hba_flag |= LINK_DISABLED;

                        goto out;
                }
        }
out:
        if (pmb)
                mempool_free(pmb, phba->mbox_mem_pool);
        kfree(rgn23_data);
        return;
}

/**
 * lpfc_cleanup_pending_mbox - Free up vport discovery mailbox commands.
 * @vport: pointer to vport data structure.
 *
 * This function iterate through the mailboxq and clean up all REG_LOGIN
 * and REG_VPI mailbox commands associated with the vport. This function
 * is called when driver want to restart discovery of the vport due to
 * a Clear Virtual Link event.
 **/
void
lpfc_cleanup_pending_mbox(struct lpfc_vport *vport)
{
        struct lpfc_hba *phba = vport->phba;
        LPFC_MBOXQ_t *mb, *nextmb;
        struct lpfc_dmabuf *mp;

        spin_lock_irq(&phba->hbalock);
        list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
                if (mb->vport != vport)
                        continue;

                if ((mb->u.mb.mbxCommand != MBX_REG_LOGIN64) &&
                        (mb->u.mb.mbxCommand != MBX_REG_VPI))
                        continue;

                if (mb->u.mb.mbxCommand == MBX_REG_LOGIN64) {
                        mp = (struct lpfc_dmabuf *) (mb->context1);
                        if (mp) {
                                __lpfc_mbuf_free(phba, mp->virt, mp->phys);
                                kfree(mp);
                        }
                }
                list_del(&mb->list);
                mempool_free(mb, phba->mbox_mem_pool);
        }
        mb = phba->sli.mbox_active;
        if (mb && (mb->vport == vport)) {
                if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) ||
                        (mb->u.mb.mbxCommand == MBX_REG_VPI))
                        mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        }
        spin_unlock_irq(&phba->hbalock);
}