drivers/scsi/lpfc/lpfc_scsi.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2012 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21 #include <linux/pci.h>
  22 #include <linux/slab.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/export.h>
  25 #include <linux/delay.h>
  26 #include <asm/unaligned.h>
  27 #include <linux/crc-t10dif.h>
  28 #include <net/checksum.h>
  29
  30 #include <scsi/scsi.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_eh.h>
  33 #include <scsi/scsi_host.h>
  34 #include <scsi/scsi_tcq.h>
  35 #include <scsi/scsi_transport_fc.h>
  36
  37 #include "lpfc_version.h"
  38 #include "lpfc_hw4.h"
  39 #include "lpfc_hw.h"
  40 #include "lpfc_sli.h"
  41 #include "lpfc_sli4.h"
  42 #include "lpfc_nl.h"
  43 #include "lpfc_disc.h"
  44 #include "lpfc.h"
  45 #include "lpfc_scsi.h"
  46 #include "lpfc_logmsg.h"
  47 #include "lpfc_crtn.h"
  48 #include "lpfc_vport.h"
  49
  50 #define LPFC_RESET_WAIT  2
  51 #define LPFC_ABORT_WAIT  2
  52
  53 int _dump_buf_done = 1;
  54
  55 static char *dif_op_str[] = {
  56         "PROT_NORMAL",
  57         "PROT_READ_INSERT",
  58         "PROT_WRITE_STRIP",
  59         "PROT_READ_STRIP",
  60         "PROT_WRITE_INSERT",
  61         "PROT_READ_PASS",
  62         "PROT_WRITE_PASS",
  63 };
  64
  65 struct scsi_dif_tuple {
  66         __be16 guard_tag;       /* Checksum */
  67         __be16 app_tag;         /* Opaque storage */
  68         __be32 ref_tag;         /* Target LBA or indirect LBA */
  69 };
  70
  71 #if !defined(SCSI_PROT_GUARD_CHECK) || !defined(SCSI_PROT_REF_CHECK)
  72 #define scsi_prot_flagged(sc, flg)      sc
  73 #endif
  74
  75 static void
  76 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  77 static void
  78 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
  79
  80 static void
  81 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
  82 {
  83         void *src, *dst;
  84         struct scatterlist *sgde = scsi_sglist(cmnd);
  85
  86         if (!_dump_buf_data) {
  87                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  88                         "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
  89                                 __func__);
  90                 return;
  91         }
  92
  93
  94         if (!sgde) {
  95                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
  96                         "9051 BLKGRD: ERROR: data scatterlist is null\n");
  97                 return;
  98         }
  99
 100         dst = (void *) _dump_buf_data;
 101         while (sgde) {
 102                 src = sg_virt(sgde);
 103                 memcpy(dst, src, sgde->length);
 104                 dst += sgde->length;
 105                 sgde = sg_next(sgde);
 106         }
 107 }
 108
 109 static void
 110 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
 111 {
 112         void *src, *dst;
 113         struct scatterlist *sgde = scsi_prot_sglist(cmnd);
 114
 115         if (!_dump_buf_dif) {
 116                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 117                         "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
 118                                 __func__);
 119                 return;
 120         }
 121
 122         if (!sgde) {
 123                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
 124                         "9053 BLKGRD: ERROR: prot scatterlist is null\n");
 125                 return;
 126         }
 127
 128         dst = _dump_buf_dif;
 129         while (sgde) {
 130                 src = sg_virt(sgde);
 131                 memcpy(dst, src, sgde->length);
 132                 dst += sgde->length;
 133                 sgde = sg_next(sgde);
 134         }
 135 }
 136
 137 /**
 138  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 139  * @phba: Pointer to HBA object.
 140  * @lpfc_cmd: lpfc scsi command object pointer.
 141  *
 142  * This function is called from the lpfc_prep_task_mgmt_cmd function to
 143  * set the last bit in the response sge entry.
 144  **/
 145 static void
 146 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
 147                                 struct lpfc_scsi_buf *lpfc_cmd)
 148 {
 149         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
 150         if (sgl) {
 151                 sgl += 1;
 152                 sgl->word2 = le32_to_cpu(sgl->word2);
 153                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 154                 sgl->word2 = cpu_to_le32(sgl->word2);
 155         }
 156 }
 157
 158 /**
 159  * lpfc_update_stats - Update statistical data for the command completion
 160  * @phba: Pointer to HBA object.
 161  * @lpfc_cmd: lpfc scsi command object pointer.
 162  *
 163  * This function is called when there is a command completion and this
 164  * function updates the statistical data for the command completion.
 165  **/
 166 static void
 167 lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
 168 {
 169         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 170         struct lpfc_nodelist *pnode = rdata->pnode;
 171         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
 172         unsigned long flags;
 173         struct Scsi_Host  *shost = cmd->device->host;
 174         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 175         unsigned long latency;
 176         int i;
 177
 178         if (cmd->result)
 179                 return;
 180
 181         latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
 182
 183         spin_lock_irqsave(shost->host_lock, flags);
 184         if (!vport->stat_data_enabled ||
 185                 vport->stat_data_blocked ||
 186                 !pnode ||
 187                 !pnode->lat_data ||
 188                 (phba->bucket_type == LPFC_NO_BUCKET)) {
 189                 spin_unlock_irqrestore(shost->host_lock, flags);
 190                 return;
 191         }
 192
 193         if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
 194                 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
 195                         phba->bucket_step;
 196                 /* check array subscript bounds */
 197                 if (i < 0)
 198                         i = 0;
 199                 else if (i >= LPFC_MAX_BUCKET_COUNT)
 200                         i = LPFC_MAX_BUCKET_COUNT - 1;
 201         } else {
 202                 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
 203                         if (latency <= (phba->bucket_base +
 204                                 ((1<<i)*phba->bucket_step)))
 205                                 break;
 206         }
 207
 208         pnode->lat_data[i].cmd_count++;
 209         spin_unlock_irqrestore(shost->host_lock, flags);
 210 }
 211
 212 /**
 213  * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
 214  * @phba: Pointer to HBA context object.
 215  * @vport: Pointer to vport object.
 216  * @ndlp: Pointer to FC node associated with the target.
 217  * @lun: Lun number of the scsi device.
 218  * @old_val: Old value of the queue depth.
 219  * @new_val: New value of the queue depth.
 220  *
 221  * This function sends an event to the mgmt application indicating
 222  * there is a change in the scsi device queue depth.
 223  **/
 224 static void
 225 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
 226                 struct lpfc_vport  *vport,
 227                 struct lpfc_nodelist *ndlp,
 228                 uint32_t lun,
 229                 uint32_t old_val,
 230                 uint32_t new_val)
 231 {
 232         struct lpfc_fast_path_event *fast_path_evt;
 233         unsigned long flags;
 234
 235         fast_path_evt = lpfc_alloc_fast_evt(phba);
 236         if (!fast_path_evt)
 237                 return;
 238
 239         fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
 240                 FC_REG_SCSI_EVENT;
 241         fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
 242                 LPFC_EVENT_VARQUEDEPTH;
 243
 244         /* Report all luns with change in queue depth */
 245         fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
 246         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 247                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
 248                         &ndlp->nlp_portname, sizeof(struct lpfc_name));
 249                 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
 250                         &ndlp->nlp_nodename, sizeof(struct lpfc_name));
 251         }
 252
 253         fast_path_evt->un.queue_depth_evt.oldval = old_val;
 254         fast_path_evt->un.queue_depth_evt.newval = new_val;
 255         fast_path_evt->vport = vport;
 256
 257         fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
 258         spin_lock_irqsave(&phba->hbalock, flags);
 259         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
 260         spin_unlock_irqrestore(&phba->hbalock, flags);
 261         lpfc_worker_wake_up(phba);
 262
 263         return;
 264 }
 265
 266 /**
 267  * lpfc_change_queue_depth - Alter scsi device queue depth
 268  * @sdev: Pointer the scsi device on which to change the queue depth.
 269  * @qdepth: New queue depth to set the sdev to.
 270  * @reason: The reason for the queue depth change.
 271  *
 272  * This function is called by the midlayer and the LLD to alter the queue
 273  * depth for a scsi device. This function sets the queue depth to the new
 274  * value and sends an event out to log the queue depth change.
 275  **/
 276 int
 277 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
 278 {
 279         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
 280         struct lpfc_hba   *phba = vport->phba;
 281         struct lpfc_rport_data *rdata;
 282         unsigned long new_queue_depth, old_queue_depth;
 283
 284         old_queue_depth = sdev->queue_depth;
 285         scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
 286         new_queue_depth = sdev->queue_depth;
 287         rdata = sdev->hostdata;
 288         if (rdata)
 289                 lpfc_send_sdev_queuedepth_change_event(phba, vport,
 290                                                        rdata->pnode, sdev->lun,
 291                                                        old_queue_depth,
 292                                                        new_queue_depth);
 293         return sdev->queue_depth;
 294 }
 295
 296 /**
 297  * lpfc_change_queue_type() - Change a device's scsi tag queuing type
 298  * @sdev: Pointer the scsi device whose queue depth is to change
 299  * @tag_type: Identifier for queue tag type
 300  */
 301 static int
 302 lpfc_change_queue_type(struct scsi_device *sdev, int tag_type)
 303 {
 304         if (sdev->tagged_supported) {
 305                 scsi_set_tag_type(sdev, tag_type);
 306                 if (tag_type)
 307                         scsi_activate_tcq(sdev, sdev->queue_depth);
 308                 else
 309                         scsi_deactivate_tcq(sdev, sdev->queue_depth);
 310         } else
 311                 tag_type = 0;
 312
 313         return tag_type;
 314 }
 315
 316 /**
 317  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
 318  * @phba: The Hba for which this call is being executed.
 319  *
 320  * This routine is called when there is resource error in driver or firmware.
 321  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 322  * posts at most 1 event each second. This routine wakes up worker thread of
 323  * @phba to process WORKER_RAM_DOWN_EVENT event.
 324  *
 325  * This routine should be called with no lock held.
 326  **/
 327 void
 328 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 329 {
 330         unsigned long flags;
 331         uint32_t evt_posted;
 332
 333         spin_lock_irqsave(&phba->hbalock, flags);
 334         atomic_inc(&phba->num_rsrc_err);
 335         phba->last_rsrc_error_time = jiffies;
 336
 337         if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
 338                 spin_unlock_irqrestore(&phba->hbalock, flags);
 339                 return;
 340         }
 341
 342         phba->last_ramp_down_time = jiffies;
 343
 344         spin_unlock_irqrestore(&phba->hbalock, flags);
 345
 346         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 347         evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
 348         if (!evt_posted)
 349                 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
 350         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 351
 352         if (!evt_posted)
 353                 lpfc_worker_wake_up(phba);
 354         return;
 355 }
 356
 357 /**
 358  * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
 359  * @phba: The Hba for which this call is being executed.
 360  *
 361  * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
 362  * post at most 1 event every 5 minute after last_ramp_up_time or
 363  * last_rsrc_error_time.  This routine wakes up worker thread of @phba
 364  * to process WORKER_RAM_DOWN_EVENT event.
 365  *
 366  * This routine should be called with no lock held.
 367  **/
 368 static inline void
 369 lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
 370                         uint32_t queue_depth)
 371 {
 372         unsigned long flags;
 373         struct lpfc_hba *phba = vport->phba;
 374         uint32_t evt_posted;
 375         atomic_inc(&phba->num_cmd_success);
 376
 377         if (vport->cfg_lun_queue_depth <= queue_depth)
 378                 return;
 379         spin_lock_irqsave(&phba->hbalock, flags);
 380         if (time_before(jiffies,
 381                         phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
 382             time_before(jiffies,
 383                         phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
 384                 spin_unlock_irqrestore(&phba->hbalock, flags);
 385                 return;
 386         }
 387         phba->last_ramp_up_time = jiffies;
 388         spin_unlock_irqrestore(&phba->hbalock, flags);
 389
 390         spin_lock_irqsave(&phba->pport->work_port_lock, flags);
 391         evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
 392         if (!evt_posted)
 393                 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
 394         spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 395
 396         if (!evt_posted)
 397                 lpfc_worker_wake_up(phba);
 398         return;
 399 }
 400
 401 /**
 402  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
 403  * @phba: The Hba for which this call is being executed.
 404  *
 405  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 406  * thread.This routine reduces queue depth for all scsi device on each vport
 407  * associated with @phba.
 408  **/
 409 void
 410 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 411 {
 412         struct lpfc_vport **vports;
 413         struct Scsi_Host  *shost;
 414         struct scsi_device *sdev;
 415         unsigned long new_queue_depth;
 416         unsigned long num_rsrc_err, num_cmd_success;
 417         int i;
 418
 419         num_rsrc_err = atomic_read(&phba->num_rsrc_err);
 420         num_cmd_success = atomic_read(&phba->num_cmd_success);
 421
 422         /*
 423          * The error and success command counters are global per
 424          * driver instance.  If another handler has already
 425          * operated on this error event, just exit.
 426          */
 427         if (num_rsrc_err == 0)
 428                 return;
 429
 430         vports = lpfc_create_vport_work_array(phba);
 431         if (vports != NULL)
 432                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 433                         shost = lpfc_shost_from_vport(vports[i]);
 434                         shost_for_each_device(sdev, shost) {
 435                                 new_queue_depth =
 436                                         sdev->queue_depth * num_rsrc_err /
 437                                         (num_rsrc_err + num_cmd_success);
 438                                 if (!new_queue_depth)
 439                                         new_queue_depth = sdev->queue_depth - 1;
 440                                 else
 441                                         new_queue_depth = sdev->queue_depth -
 442                                                                 new_queue_depth;
 443                                 lpfc_change_queue_depth(sdev, new_queue_depth,
 444                                                         SCSI_QDEPTH_DEFAULT);
 445                         }
 446                 }
 447         lpfc_destroy_vport_work_array(phba, vports);
 448         atomic_set(&phba->num_rsrc_err, 0);
 449         atomic_set(&phba->num_cmd_success, 0);
 450 }
 451
 452 /**
 453  * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
 454  * @phba: The Hba for which this call is being executed.
 455  *
 456  * This routine is called to  process WORKER_RAMP_UP_QUEUE event for worker
 457  * thread.This routine increases queue depth for all scsi device on each vport
 458  * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
 459  * num_cmd_success to zero.
 460  **/
 461 void
 462 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
 463 {
 464         struct lpfc_vport **vports;
 465         struct Scsi_Host  *shost;
 466         struct scsi_device *sdev;
 467         int i;
 468
 469         vports = lpfc_create_vport_work_array(phba);
 470         if (vports != NULL)
 471                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 472                         shost = lpfc_shost_from_vport(vports[i]);
 473                         shost_for_each_device(sdev, shost) {
 474                                 if (vports[i]->cfg_lun_queue_depth <=
 475                                     sdev->queue_depth)
 476                                         continue;
 477                                 lpfc_change_queue_depth(sdev,
 478                                                         sdev->queue_depth+1,
 479                                                         SCSI_QDEPTH_RAMP_UP);
 480                         }
 481                 }
 482         lpfc_destroy_vport_work_array(phba, vports);
 483         atomic_set(&phba->num_rsrc_err, 0);
 484         atomic_set(&phba->num_cmd_success, 0);
 485 }
 486
 487 /**
 488  * lpfc_scsi_dev_block - set all scsi hosts to block state
 489  * @phba: Pointer to HBA context object.
 490  *
 491  * This function walks vport list and set each SCSI host to block state
 492  * by invoking fc_remote_port_delete() routine. This function is invoked
 493  * with EEH when device's PCI slot has been permanently disabled.
 494  **/
 495 void
 496 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 497 {
 498         struct lpfc_vport **vports;
 499         struct Scsi_Host  *shost;
 500         struct scsi_device *sdev;
 501         struct fc_rport *rport;
 502         int i;
 503
 504         vports = lpfc_create_vport_work_array(phba);
 505         if (vports != NULL)
 506                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
 507                         shost = lpfc_shost_from_vport(vports[i]);
 508                         shost_for_each_device(sdev, shost) {
 509                                 rport = starget_to_rport(scsi_target(sdev));
 510                                 fc_remote_port_delete(rport);
 511                         }
 512                 }
 513         lpfc_destroy_vport_work_array(phba, vports);
 514 }
 515
 516 /**
 517  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
 518  * @vport: The virtual port for which this call being executed.
 519  * @num_to_allocate: The requested number of buffers to allocate.
 520  *
 521  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 522  * the scsi buffer contains all the necessary information needed to initiate
 523  * a SCSI I/O. The non-DMAable buffer region contains information to build
 524  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
 525  * and the initial BPL. In addition to allocating memory, the FCP CMND and
 526  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
 527  *
 528  * Return codes:
 529  *   int - number of scsi buffers that were allocated.
 530  *   0 = failure, less than num_to_alloc is a partial failure.
 531  **/
 532 static int
 533 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 534 {
 535         struct lpfc_hba *phba = vport->phba;
 536         struct lpfc_scsi_buf *psb;
 537         struct ulp_bde64 *bpl;
 538         IOCB_t *iocb;
 539         dma_addr_t pdma_phys_fcp_cmd;
 540         dma_addr_t pdma_phys_fcp_rsp;
 541         dma_addr_t pdma_phys_bpl;
 542         uint16_t iotag;
 543         int bcnt, bpl_size;
 544
 545         bpl_size = phba->cfg_sg_dma_buf_size -
 546                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 547
 548         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 549                          "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 550                          num_to_alloc, phba->cfg_sg_dma_buf_size,
 551                          (int)sizeof(struct fcp_cmnd),
 552                          (int)sizeof(struct fcp_rsp), bpl_size);
 553
 554         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 555                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 556                 if (!psb)
 557                         break;
 558
 559                 /*
 560                  * Get memory from the pci pool to map the virt space to pci
 561                  * bus space for an I/O.  The DMA buffer includes space for the
 562                  * struct fcp_cmnd, struct fcp_rsp and the number of bde's
 563                  * necessary to support the sg_tablesize.
 564                  */
 565                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 566                                         GFP_KERNEL, &psb->dma_handle);
 567                 if (!psb->data) {
 568                         kfree(psb);
 569                         break;
 570                 }
 571
 572                 /* Initialize virtual ptrs to dma_buf region. */
 573                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 574
 575                 /* Allocate iotag for psb->cur_iocbq. */
 576                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 577                 if (iotag == 0) {
 578                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 579                                         psb->data, psb->dma_handle);
 580                         kfree(psb);
 581                         break;
 582                 }
 583                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
 584
 585                 psb->fcp_cmnd = psb->data;
 586                 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
 587                 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
 588                         sizeof(struct fcp_rsp);
 589
 590                 /* Initialize local short-hand pointers. */
 591                 bpl = psb->fcp_bpl;
 592                 pdma_phys_fcp_cmd = psb->dma_handle;
 593                 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
 594                 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
 595                         sizeof(struct fcp_rsp);
 596
 597                 /*
 598                  * The first two bdes are the FCP_CMD and FCP_RSP. The balance
 599                  * are sg list bdes.  Initialize the first two and leave the
 600                  * rest for queuecommand.
 601                  */
 602                 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
 603                 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
 604                 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
 605                 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 606                 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 607
 608                 /* Setup the physical region for the FCP RSP */
 609                 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
 610                 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
 611                 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
 612                 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 613                 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 614
 615                 /*
 616                  * Since the IOCB for the FCP I/O is built into this
 617                  * lpfc_scsi_buf, initialize it with all known data now.
 618                  */
 619                 iocb = &psb->cur_iocbq.iocb;
 620                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
 621                 if ((phba->sli_rev == 3) &&
 622                                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
 623                         /* fill in immediate fcp command BDE */
 624                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
 625                         iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
 626                         iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
 627                                         unsli3.fcp_ext.icd);
 628                         iocb->un.fcpi64.bdl.addrHigh = 0;
 629                         iocb->ulpBdeCount = 0;
 630                         iocb->ulpLe = 0;
 631                         /* fill in response BDE */
 632                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
 633                                                         BUFF_TYPE_BDE_64;
 634                         iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
 635                                 sizeof(struct fcp_rsp);
 636                         iocb->unsli3.fcp_ext.rbde.addrLow =
 637                                 putPaddrLow(pdma_phys_fcp_rsp);
 638                         iocb->unsli3.fcp_ext.rbde.addrHigh =
 639                                 putPaddrHigh(pdma_phys_fcp_rsp);
 640                 } else {
 641                         iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 642                         iocb->un.fcpi64.bdl.bdeSize =
 643                                         (2 * sizeof(struct ulp_bde64));
 644                         iocb->un.fcpi64.bdl.addrLow =
 645                                         putPaddrLow(pdma_phys_bpl);
 646                         iocb->un.fcpi64.bdl.addrHigh =
 647                                         putPaddrHigh(pdma_phys_bpl);
 648                         iocb->ulpBdeCount = 1;
 649                         iocb->ulpLe = 1;
 650                 }
 651                 iocb->ulpClass = CLASS3;
 652                 psb->status = IOSTAT_SUCCESS;
 653                 /* Put it back into the SCSI buffer list */
 654                 psb->cur_iocbq.context1  = psb;
 655                 lpfc_release_scsi_buf_s3(phba, psb);
 656
 657         }
 658
 659         return bcnt;
 660 }
 661
 662 /**
 663  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
 664  * @vport: pointer to lpfc vport data structure.
 665  *
 666  * This routine is invoked by the vport cleanup for deletions and the cleanup
 667  * for an ndlp on removal.
 668  **/
 669 void
 670 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 671 {
 672         struct lpfc_hba *phba = vport->phba;
 673         struct lpfc_scsi_buf *psb, *next_psb;
 674         unsigned long iflag = 0;
 675
 676         spin_lock_irqsave(&phba->hbalock, iflag);
 677         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 678         list_for_each_entry_safe(psb, next_psb,
 679                                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 680                 if (psb->rdata && psb->rdata->pnode
 681                         && psb->rdata->pnode->vport == vport)
 682                         psb->rdata = NULL;
 683         }
 684         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 685         spin_unlock_irqrestore(&phba->hbalock, iflag);
 686 }
 687
 688 /**
 689  * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 690  * @phba: pointer to lpfc hba data structure.
 691  * @axri: pointer to the fcp xri abort wcqe structure.
 692  *
 693  * This routine is invoked by the worker thread to process a SLI4 fast-path
 694  * FCP aborted xri.
 695  **/
 696 void
 697 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
 698                           struct sli4_wcqe_xri_aborted *axri)
 699 {
 700         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
 701         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
 702         struct lpfc_scsi_buf *psb, *next_psb;
 703         unsigned long iflag = 0;
 704         struct lpfc_iocbq *iocbq;
 705         int i;
 706         struct lpfc_nodelist *ndlp;
 707         int rrq_empty = 0;
 708         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 709
 710         spin_lock_irqsave(&phba->hbalock, iflag);
 711         spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 712         list_for_each_entry_safe(psb, next_psb,
 713                 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
 714                 if (psb->cur_iocbq.sli4_xritag == xri) {
 715                         list_del(&psb->list);
 716                         psb->exch_busy = 0;
 717                         psb->status = IOSTAT_SUCCESS;
 718                         spin_unlock(
 719                                 &phba->sli4_hba.abts_scsi_buf_list_lock);
 720                         if (psb->rdata && psb->rdata->pnode)
 721                                 ndlp = psb->rdata->pnode;
 722                         else
 723                                 ndlp = NULL;
 724
 725                         rrq_empty = list_empty(&phba->active_rrq_list);
 726                         spin_unlock_irqrestore(&phba->hbalock, iflag);
 727                         if (ndlp) {
 728                                 lpfc_set_rrq_active(phba, ndlp,
 729                                         psb->cur_iocbq.sli4_lxritag, rxid, 1);
 730                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 731                         }
 732                         lpfc_release_scsi_buf_s4(phba, psb);
 733                         if (rrq_empty)
 734                                 lpfc_worker_wake_up(phba);
 735                         return;
 736                 }
 737         }
 738         spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
 739         for (i = 1; i <= phba->sli.last_iotag; i++) {
 740                 iocbq = phba->sli.iocbq_lookup[i];
 741
 742                 if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
 743                         (iocbq->iocb_flag & LPFC_IO_LIBDFC))
 744                         continue;
 745                 if (iocbq->sli4_xritag != xri)
 746                         continue;
 747                 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
 748                 psb->exch_busy = 0;
 749                 spin_unlock_irqrestore(&phba->hbalock, iflag);
 750                 if (!list_empty(&pring->txq))
 751                         lpfc_worker_wake_up(phba);
 752                 return;
 753
 754         }
 755         spin_unlock_irqrestore(&phba->hbalock, iflag);
 756 }
 757
 758 /**
 759  * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list
 760  * @phba: pointer to lpfc hba data structure.
 761  * @post_sblist: pointer to the scsi buffer list.
 762  *
 763  * This routine walks a list of scsi buffers that was passed in. It attempts
 764  * to construct blocks of scsi buffer sgls which contains contiguous xris and
 765  * uses the non-embedded SGL block post mailbox commands to post to the port.
 766  * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use
 767  * embedded SGL post mailbox command for posting. The @post_sblist passed in
 768  * must be local list, thus no lock is needed when manipulate the list.
 769  *
 770  * Returns: 0 = failure, non-zero number of successfully posted buffers.
 771  **/
 772 int
 773 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba,
 774                              struct list_head *post_sblist, int sb_count)
 775 {
 776         struct lpfc_scsi_buf *psb, *psb_next;
 777         int status, sgl_size;
 778         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
 779         dma_addr_t pdma_phys_bpl1;
 780         int last_xritag = NO_XRI;
 781         LIST_HEAD(prep_sblist);
 782         LIST_HEAD(blck_sblist);
 783         LIST_HEAD(scsi_sblist);
 784
 785         /* sanity check */
 786         if (sb_count <= 0)
 787                 return -EINVAL;
 788
 789         sgl_size = phba->cfg_sg_dma_buf_size -
 790                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 791
 792         list_for_each_entry_safe(psb, psb_next, post_sblist, list) {
 793                 list_del_init(&psb->list);
 794                 block_cnt++;
 795                 if ((last_xritag != NO_XRI) &&
 796                     (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) {
 797                         /* a hole in xri block, form a sgl posting block */
 798                         list_splice_init(&prep_sblist, &blck_sblist);
 799                         post_cnt = block_cnt - 1;
 800                         /* prepare list for next posting block */
 801                         list_add_tail(&psb->list, &prep_sblist);
 802                         block_cnt = 1;
 803                 } else {
 804                         /* prepare list for next posting block */
 805                         list_add_tail(&psb->list, &prep_sblist);
 806                         /* enough sgls for non-embed sgl mbox command */
 807                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
 808                                 list_splice_init(&prep_sblist, &blck_sblist);
 809                                 post_cnt = block_cnt;
 810                                 block_cnt = 0;
 811                         }
 812                 }
 813                 num_posting++;
 814                 last_xritag = psb->cur_iocbq.sli4_xritag;
 815
 816                 /* end of repost sgl list condition for SCSI buffers */
 817                 if (num_posting == sb_count) {
 818                         if (post_cnt == 0) {
 819                                 /* last sgl posting block */
 820                                 list_splice_init(&prep_sblist, &blck_sblist);
 821                                 post_cnt = block_cnt;
 822                         } else if (block_cnt == 1) {
 823                                 /* last single sgl with non-contiguous xri */
 824                                 if (sgl_size > SGL_PAGE_SIZE)
 825                                         pdma_phys_bpl1 = psb->dma_phys_bpl +
 826                                                                 SGL_PAGE_SIZE;
 827                                 else
 828                                         pdma_phys_bpl1 = 0;
 829                                 status = lpfc_sli4_post_sgl(phba,
 830                                                 psb->dma_phys_bpl,
 831                                                 pdma_phys_bpl1,
 832                                                 psb->cur_iocbq.sli4_xritag);
 833                                 if (status) {
 834                                         /* failure, put on abort scsi list */
 835                                         psb->exch_busy = 1;
 836                                 } else {
 837                                         /* success, put on SCSI buffer list */
 838                                         psb->exch_busy = 0;
 839                                         psb->status = IOSTAT_SUCCESS;
 840                                         num_posted++;
 841                                 }
 842                                 /* success, put on SCSI buffer sgl list */
 843                                 list_add_tail(&psb->list, &scsi_sblist);
 844                         }
 845                 }
 846
 847                 /* continue until a nembed page worth of sgls */
 848                 if (post_cnt == 0)
 849                         continue;
 850
 851                 /* post block of SCSI buffer list sgls */
 852                 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist,
 853                                                        post_cnt);
 854
 855                 /* don't reset xirtag due to hole in xri block */
 856                 if (block_cnt == 0)
 857                         last_xritag = NO_XRI;
 858
 859                 /* reset SCSI buffer post count for next round of posting */
 860                 post_cnt = 0;
 861
 862                 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */
 863                 while (!list_empty(&blck_sblist)) {
 864                         list_remove_head(&blck_sblist, psb,
 865                                          struct lpfc_scsi_buf, list);
 866                         if (status) {
 867                                 /* failure, put on abort scsi list */
 868                                 psb->exch_busy = 1;
 869                         } else {
 870                                 /* success, put on SCSI buffer list */
 871                                 psb->exch_busy = 0;
 872                                 psb->status = IOSTAT_SUCCESS;
 873                                 num_posted++;
 874                         }
 875                         list_add_tail(&psb->list, &scsi_sblist);
 876                 }
 877         }
 878         /* Push SCSI buffers with sgl posted to the availble list */
 879         while (!list_empty(&scsi_sblist)) {
 880                 list_remove_head(&scsi_sblist, psb,
 881                                  struct lpfc_scsi_buf, list);
 882                 lpfc_release_scsi_buf_s4(phba, psb);
 883         }
 884         return num_posted;
 885 }
 886
 887 /**
 888  * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls
 889  * @phba: pointer to lpfc hba data structure.
 890  *
 891  * This routine walks the list of scsi buffers that have been allocated and
 892  * repost them to the port by using SGL block post. This is needed after a
 893  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 894  * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 895  * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 896  *
 897  * Returns: 0 = success, non-zero failure.
 898  **/
 899 int
 900 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 901 {
 902         LIST_HEAD(post_sblist);
 903         int num_posted, rc = 0;
 904
 905         /* get all SCSI buffers need to repost to a local list */
 906         spin_lock_irq(&phba->scsi_buf_list_get_lock);
 907         spin_lock_irq(&phba->scsi_buf_list_put_lock);
 908         list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist);
 909         list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist);
 910         spin_unlock_irq(&phba->scsi_buf_list_put_lock);
 911         spin_unlock_irq(&phba->scsi_buf_list_get_lock);
 912
 913         /* post the list of scsi buffer sgls to port if available */
 914         if (!list_empty(&post_sblist)) {
 915                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist,
 916                                                 phba->sli4_hba.scsi_xri_cnt);
 917                 /* failed to post any scsi buffer, return error */
 918                 if (num_posted == 0)
 919                         rc = -EIO;
 920         }
 921         return rc;
 922 }
 923
 924 /**
 925  * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 926  * @vport: The virtual port for which this call being executed.
 927  * @num_to_allocate: The requested number of buffers to allocate.
 928  *
 929  * This routine allocates scsi buffers for device with SLI-4 interface spec,
 930  * the scsi buffer contains all the necessary information needed to initiate
 931  * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put
 932  * them on a list, it post them to the port by using SGL block post.
 933  *
 934  * Return codes:
 935  *   int - number of scsi buffers that were allocated and posted.
 936  *   0 = failure, less than num_to_alloc is a partial failure.
 937  **/
 938 static int
 939 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
 940 {
 941         struct lpfc_hba *phba = vport->phba;
 942         struct lpfc_scsi_buf *psb;
 943         struct sli4_sge *sgl;
 944         IOCB_t *iocb;
 945         dma_addr_t pdma_phys_fcp_cmd;
 946         dma_addr_t pdma_phys_fcp_rsp;
 947         dma_addr_t pdma_phys_bpl;
 948         uint16_t iotag, lxri = 0;
 949         int bcnt, num_posted, sgl_size;
 950         LIST_HEAD(prep_sblist);
 951         LIST_HEAD(post_sblist);
 952         LIST_HEAD(scsi_sblist);
 953
 954         sgl_size = phba->cfg_sg_dma_buf_size -
 955                 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 956
 957         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
 958                          "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
 959                          num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size,
 960                          (int)sizeof(struct fcp_cmnd),
 961                          (int)sizeof(struct fcp_rsp));
 962
 963         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
 964                 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
 965                 if (!psb)
 966                         break;
 967                 /*
 968                  * Get memory from the pci pool to map the virt space to
 969                  * pci bus space for an I/O. The DMA buffer includes space
 970                  * for the struct fcp_cmnd, struct fcp_rsp and the number
 971                  * of bde's necessary to support the sg_tablesize.
 972                  */
 973                 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool,
 974                                                 GFP_KERNEL, &psb->dma_handle);
 975                 if (!psb->data) {
 976                         kfree(psb);
 977                         break;
 978                 }
 979                 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
 980
 981                 /* Page alignment is CRITICAL, double check to be sure */
 982                 if (((unsigned long)(psb->data) &
 983                     (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0) {
 984                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 985                                       psb->data, psb->dma_handle);
 986                         kfree(psb);
 987                         break;
 988                 }
 989
 990                 /* Allocate iotag for psb->cur_iocbq. */
 991                 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
 992                 if (iotag == 0) {
 993                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
 994                                 psb->data, psb->dma_handle);
 995                         kfree(psb);
 996                         break;
 997                 }
 998
 999                 lxri = lpfc_sli4_next_xritag(phba);
1000                 if (lxri == NO_XRI) {
1001                         pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
1002                               psb->data, psb->dma_handle);
1003                         kfree(psb);
1004                         break;
1005                 }
1006                 psb->cur_iocbq.sli4_lxritag = lxri;
1007                 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
1008                 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
1009                 psb->fcp_bpl = psb->data;
1010                 psb->fcp_cmnd = (psb->data + sgl_size);
1011                 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
1012                                         sizeof(struct fcp_cmnd));
1013
1014                 /* Initialize local short-hand pointers. */
1015                 sgl = (struct sli4_sge *)psb->fcp_bpl;
1016                 pdma_phys_bpl = psb->dma_handle;
1017                 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size);
1018                 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
1019
1020                 /*
1021                  * The first two bdes are the FCP_CMD and FCP_RSP.
1022                  * The balance are sg list bdes. Initialize the
1023                  * first two and leave the rest for queuecommand.
1024                  */
1025                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
1026                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
1027                 sgl->word2 = le32_to_cpu(sgl->word2);
1028                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1029                 sgl->word2 = cpu_to_le32(sgl->word2);
1030                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
1031                 sgl++;
1032
1033                 /* Setup the physical region for the FCP RSP */
1034                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
1035                 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
1036                 sgl->word2 = le32_to_cpu(sgl->word2);
1037                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1038                 sgl->word2 = cpu_to_le32(sgl->word2);
1039                 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
1040
1041                 /*
1042                  * Since the IOCB for the FCP I/O is built into this
1043                  * lpfc_scsi_buf, initialize it with all known data now.
1044                  */
1045                 iocb = &psb->cur_iocbq.iocb;
1046                 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
1047                 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
1048                 /* setting the BLP size to 2 * sizeof BDE may not be correct.
1049                  * We are setting the bpl to point to out sgl. An sgl's
1050                  * entries are 16 bytes, a bpl entries are 12 bytes.
1051                  */
1052                 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
1053                 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
1054                 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
1055                 iocb->ulpBdeCount = 1;
1056                 iocb->ulpLe = 1;
1057                 iocb->ulpClass = CLASS3;
1058                 psb->cur_iocbq.context1 = psb;
1059                 psb->dma_phys_bpl = pdma_phys_bpl;
1060
1061                 /* add the scsi buffer to a post list */
1062                 list_add_tail(&psb->list, &post_sblist);
1063                 spin_lock_irq(&phba->scsi_buf_list_get_lock);
1064                 phba->sli4_hba.scsi_xri_cnt++;
1065                 spin_unlock_irq(&phba->scsi_buf_list_get_lock);
1066         }
1067         lpfc_printf_log(phba, KERN_INFO, LOG_BG,
1068                         "3021 Allocate %d out of %d requested new SCSI "
1069                         "buffers\n", bcnt, num_to_alloc);
1070
1071         /* post the list of scsi buffer sgls to port if available */
1072         if (!list_empty(&post_sblist))
1073                 num_posted = lpfc_sli4_post_scsi_sgl_list(phba,
1074                                                           &post_sblist, bcnt);
1075         else
1076                 num_posted = 0;
1077
1078         return num_posted;
1079 }
1080
1081 /**
1082  * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
1083  * @vport: The virtual port for which this call being executed.
1084  * @num_to_allocate: The requested number of buffers to allocate.
1085  *
1086  * This routine wraps the actual SCSI buffer allocator function pointer from
1087  * the lpfc_hba struct.
1088  *
1089  * Return codes:
1090  *   int - number of scsi buffers that were allocated.
1091  *   0 = failure, less than num_to_alloc is a partial failure.
1092  **/
1093 static inline int
1094 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
1095 {
1096         return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
1097 }
1098
1099 /**
1100  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1101  * @phba: The HBA for which this call is being executed.
1102  *
1103  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1104  * and returns to caller.
1105  *
1106  * Return codes:
1107  *   NULL - Error
1108  *   Pointer to lpfc_scsi_buf - Success
1109  **/
1110 static struct lpfc_scsi_buf*
1111 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1112 {
1113         struct  lpfc_scsi_buf * lpfc_cmd = NULL;
1114         struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
1115         unsigned long gflag = 0;
1116         unsigned long pflag = 0;
1117
1118         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, gflag);
1119         list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf,
1120                          list);
1121         if (!lpfc_cmd) {
1122                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, pflag);
1123                 list_splice(&phba->lpfc_scsi_buf_list_put,
1124                             &phba->lpfc_scsi_buf_list_get);
1125                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1126                 list_remove_head(scsi_buf_list_get, lpfc_cmd,
1127                                  struct lpfc_scsi_buf, list);
1128                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, pflag);
1129         }
1130         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, gflag);
1131         return  lpfc_cmd;
1132 }
1133 /**
1134  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1135  * @phba: The HBA for which this call is being executed.
1136  *
1137  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1138  * and returns to caller.
1139  *
1140  * Return codes:
1141  *   NULL - Error
1142  *   Pointer to lpfc_scsi_buf - Success
1143  **/
1144 static struct lpfc_scsi_buf*
1145 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1146 {
1147         struct lpfc_scsi_buf *lpfc_cmd ;
1148         unsigned long gflag = 0;
1149         unsigned long pflag = 0;
1150         int found = 0;
1151
1152         spin_lock_irqsave(&phba->scsi_buf_list_get_lock, gflag);
1153         list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list_get, list) {
1154                 if (lpfc_test_rrq_active(phba, ndlp,
1155                                          lpfc_cmd->cur_iocbq.sli4_lxritag))
1156                         continue;
1157                 list_del(&lpfc_cmd->list);
1158                 found = 1;
1159                 break;
1160         }
1161         if (!found) {
1162                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, pflag);
1163                 list_splice(&phba->lpfc_scsi_buf_list_put,
1164                             &phba->lpfc_scsi_buf_list_get);
1165                 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
1166                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, pflag);
1167                 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list_get,
1168                                     list) {
1169                         if (lpfc_test_rrq_active(
1170                                 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag))
1171                                 continue;
1172                         list_del(&lpfc_cmd->list);
1173                         found = 1;
1174                         break;
1175                 }
1176         }
1177         spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, gflag);
1178         if (!found)
1179                 return NULL;
1180         return  lpfc_cmd;
1181 }
1182 /**
1183  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
1184  * @phba: The HBA for which this call is being executed.
1185  *
1186  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
1187  * and returns to caller.
1188  *
1189  * Return codes:
1190  *   NULL - Error
1191  *   Pointer to lpfc_scsi_buf - Success
1192  **/
1193 static struct lpfc_scsi_buf*
1194 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1195 {
1196         return  phba->lpfc_get_scsi_buf(phba, ndlp);
1197 }
1198
1199 /**
1200  * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
1201  * @phba: The Hba for which this call is being executed.
1202  * @psb: The scsi buffer which is being released.
1203  *
1204  * This routine releases @psb scsi buffer by adding it to tail of @phba
1205  * lpfc_scsi_buf_list list.
1206  **/
1207 static void
1208 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1209 {
1210         unsigned long iflag = 0;
1211
1212         psb->seg_cnt = 0;
1213         psb->nonsg_phys = 0;
1214         psb->prot_seg_cnt = 0;
1215
1216         spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1217         psb->pCmd = NULL;
1218         psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1219         list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1220         spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1221 }
1222
1223 /**
1224  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
1225  * @phba: The Hba for which this call is being executed.
1226  * @psb: The scsi buffer which is being released.
1227  *
1228  * This routine releases @psb scsi buffer by adding it to tail of @phba
1229  * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
1230  * and cannot be reused for at least RA_TOV amount of time if it was
1231  * aborted.
1232  **/
1233 static void
1234 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1235 {
1236         unsigned long iflag = 0;
1237
1238         psb->seg_cnt = 0;
1239         psb->nonsg_phys = 0;
1240         psb->prot_seg_cnt = 0;
1241
1242         if (psb->exch_busy) {
1243                 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
1244                                         iflag);
1245                 psb->pCmd = NULL;
1246                 list_add_tail(&psb->list,
1247                         &phba->sli4_hba.lpfc_abts_scsi_buf_list);
1248                 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
1249                                         iflag);
1250         } else {
1251                 psb->pCmd = NULL;
1252                 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP;
1253                 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
1254                 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
1255                 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
1256         }
1257 }
1258
1259 /**
1260  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
1261  * @phba: The Hba for which this call is being executed.
1262  * @psb: The scsi buffer which is being released.
1263  *
1264  * This routine releases @psb scsi buffer by adding it to tail of @phba
1265  * lpfc_scsi_buf_list list.
1266  **/
1267 static void
1268 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
1269 {
1270
1271         phba->lpfc_release_scsi_buf(phba, psb);
1272 }
1273
1274 /**
1275  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1276  * @phba: The Hba for which this call is being executed.
1277  * @lpfc_cmd: The scsi buffer which is going to be mapped.
1278  *
1279  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1280  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
1281  * through sg elements and format the bdea. This routine also initializes all
1282  * IOCB fields which are dependent on scsi command request buffer.
1283  *
1284  * Return codes:
1285  *   1 - Error
1286  *   0 - Success
1287  **/
1288 static int
1289 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
1290 {
1291         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
1292         struct scatterlist *sgel = NULL;
1293         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
1294         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
1295         struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
1296         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1297         struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
1298         dma_addr_t physaddr;
1299         uint32_t num_bde = 0;
1300         int nseg, datadir = scsi_cmnd->sc_data_direction;
1301
1302         /*
1303          * There are three possibilities here - use scatter-gather segment, use
1304          * the single mapping, or neither.  Start the lpfc command prep by
1305          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
1306          * data bde entry.
1307          */
1308         bpl += 2;
1309         if (scsi_sg_count(scsi_cmnd)) {
1310                 /*
1311                  * The driver stores the segment count returned from pci_map_sg
1312                  * because this a count of dma-mappings used to map the use_sg
1313                  * pages.  They are not guaranteed to be the same for those
1314                  * architectures that implement an IOMMU.
1315                  */
1316
1317                 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
1318                                   scsi_sg_count(scsi_cmnd), datadir);
1319                 if (unlikely(!nseg))
1320                         return 1;
1321
1322                 lpfc_cmd->seg_cnt = nseg;
1323                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1324                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1325                                 "9064 BLKGRD: %s: Too many sg segments from "
1326                                "dma_map_sg.  Config %d, seg_cnt %d\n",
1327                                __func__, phba->cfg_sg_seg_cnt,
1328                                lpfc_cmd->seg_cnt);
1329                         lpfc_cmd->seg_cnt = 0;
1330                         scsi_dma_unmap(scsi_cmnd);
1331                         return 1;
1332                 }
1333
1334                 /*
1335                  * The driver established a maximum scatter-gather segment count
1336                  * during probe that limits the number of sg elements in any
1337                  * single scsi command.  Just run through the seg_cnt and format
1338                  * the bde's.
1339                  * When using SLI-3 the driver will try to fit all the BDEs into
1340                  * the IOCB. If it can't then the BDEs get added to a BPL as it
1341                  * does for SLI-2 mode.
1342                  */
1343                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
1344                         physaddr = sg_dma_address(sgel);
1345                         if (phba->sli_rev == 3 &&
1346                             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1347                             !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1348                             nseg <= LPFC_EXT_DATA_BDE_COUNT) {
1349                                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1350                                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
1351                                 data_bde->addrLow = putPaddrLow(physaddr);
1352                                 data_bde->addrHigh = putPaddrHigh(physaddr);
1353                                 data_bde++;
1354                         } else {
1355                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1356                                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
1357                                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
1358                                 bpl->addrLow =
1359                                         le32_to_cpu(putPaddrLow(physaddr));
1360                                 bpl->addrHigh =
1361                                         le32_to_cpu(putPaddrHigh(physaddr));
1362                                 bpl++;
1363                         }
1364                 }
1365         }
1366
1367         /*
1368          * Finish initializing those IOCB fields that are dependent on the
1369          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
1370          * explicitly reinitialized and for SLI-3 the extended bde count is
1371          * explicitly reinitialized since all iocb memory resources are reused.
1372          */
1373         if (phba->sli_rev == 3 &&
1374             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1375             !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1376                 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
1377                         /*
1378                          * The extended IOCB format can only fit 3 BDE or a BPL.
1379                          * This I/O has more than 3 BDE so the 1st data bde will
1380                          * be a BPL that is filled in here.
1381                          */
1382                         physaddr = lpfc_cmd->dma_handle;
1383                         data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
1384                         data_bde->tus.f.bdeSize = (num_bde *
1385                                                    sizeof(struct ulp_bde64));
1386                         physaddr += (sizeof(struct fcp_cmnd) +
1387                                      sizeof(struct fcp_rsp) +
1388                                      (2 * sizeof(struct ulp_bde64)));
1389                         data_bde->addrHigh = putPaddrHigh(physaddr);
1390                         data_bde->addrLow = putPaddrLow(physaddr);
1391                         /* ebde count includes the response bde and data bpl */
1392                         iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
1393                 } else {
1394                         /* ebde count includes the response bde and data bdes */
1395                         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1396                 }
1397         } else {
1398                 iocb_cmd->un.fcpi64.bdl.bdeSize =
1399                         ((num_bde + 2) * sizeof(struct ulp_bde64));
1400                 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1401         }
1402         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1403
1404         /*
1405          * Due to difference in data length between DIF/non-DIF paths,
1406          * we need to set word 4 of IOCB here
1407          */
1408         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1409         return 0;
1410 }
1411
1412 static inline unsigned
1413 lpfc_cmd_blksize(struct scsi_cmnd *sc)
1414 {
1415         return sc->device->sector_size;
1416 }
1417
1418 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1419
1420 /* Return if if error injection is detected by Initiator */
1421 #define BG_ERR_INIT     0x1
1422 /* Return if if error injection is detected by Target */
1423 #define BG_ERR_TGT      0x2
1424 /* Return if if swapping CSUM<-->CRC is required for error injection */
1425 #define BG_ERR_SWAP     0x10
1426 /* Return if disabling Guard/Ref/App checking is required for error injection */
1427 #define BG_ERR_CHECK    0x20
1428
1429 /**
1430  * lpfc_bg_err_inject - Determine if we should inject an error
1431  * @phba: The Hba for which this call is being executed.
1432  * @sc: The SCSI command to examine
1433  * @reftag: (out) BlockGuard reference tag for transmitted data
1434  * @apptag: (out) BlockGuard application tag for transmitted data
1435  * @new_guard (in) Value to replace CRC with if needed
1436  *
1437  * Returns BG_ERR_* bit mask or 0 if request ignored
1438  **/
1439 static int
1440 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1441                 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
1442 {
1443         struct scatterlist *sgpe; /* s/g prot entry */
1444         struct scatterlist *sgde; /* s/g data entry */
1445         struct lpfc_scsi_buf *lpfc_cmd = NULL;
1446         struct scsi_dif_tuple *src = NULL;
1447         struct lpfc_nodelist *ndlp;
1448         struct lpfc_rport_data *rdata;
1449         uint32_t op = scsi_get_prot_op(sc);
1450         uint32_t blksize;
1451         uint32_t numblks;
1452         sector_t lba;
1453         int rc = 0;
1454         int blockoff = 0;
1455
1456         if (op == SCSI_PROT_NORMAL)
1457                 return 0;
1458
1459         sgpe = scsi_prot_sglist(sc);
1460         sgde = scsi_sglist(sc);
1461         lba = scsi_get_lba(sc);
1462
1463         /* First check if we need to match the LBA */
1464         if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
1465                 blksize = lpfc_cmd_blksize(sc);
1466                 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
1467
1468                 /* Make sure we have the right LBA if one is specified */
1469                 if ((phba->lpfc_injerr_lba < lba) ||
1470                         (phba->lpfc_injerr_lba >= (lba + numblks)))
1471                         return 0;
1472                 if (sgpe) {
1473                         blockoff = phba->lpfc_injerr_lba - lba;
1474                         numblks = sg_dma_len(sgpe) /
1475                                 sizeof(struct scsi_dif_tuple);
1476                         if (numblks < blockoff)
1477                                 blockoff = numblks;
1478                 }
1479         }
1480
1481         /* Next check if we need to match the remote NPortID or WWPN */
1482         rdata = sc->device->hostdata;
1483         if (rdata && rdata->pnode) {
1484                 ndlp = rdata->pnode;
1485
1486                 /* Make sure we have the right NPortID if one is specified */
1487                 if (phba->lpfc_injerr_nportid  &&
1488                         (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
1489                         return 0;
1490
1491                 /*
1492                  * Make sure we have the right WWPN if one is specified.
1493                  * wwn[0] should be a non-zero NAA in a good WWPN.
1494                  */
1495                 if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
1496                         (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
1497                                 sizeof(struct lpfc_name)) != 0))
1498                         return 0;
1499         }
1500
1501         /* Setup a ptr to the protection data if the SCSI host provides it */
1502         if (sgpe) {
1503                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
1504                 src += blockoff;
1505                 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble;
1506         }
1507
1508         /* Should we change the Reference Tag */
1509         if (reftag) {
1510                 if (phba->lpfc_injerr_wref_cnt) {
1511                         switch (op) {
1512                         case SCSI_PROT_WRITE_PASS:
1513                                 if (src) {
1514                                         /*
1515                                          * For WRITE_PASS, force the error
1516                                          * to be sent on the wire. It should
1517                                          * be detected by the Target.
1518                                          * If blockoff != 0 error will be
1519                                          * inserted in middle of the IO.
1520                                          */
1521
1522                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1523                                         "9076 BLKGRD: Injecting reftag error: "
1524                                         "write lba x%lx + x%x oldrefTag x%x\n",
1525                                         (unsigned long)lba, blockoff,
1526                                         be32_to_cpu(src->ref_tag));
1527
1528                                         /*
1529                                          * Save the old ref_tag so we can
1530                                          * restore it on completion.
1531                                          */
1532                                         if (lpfc_cmd) {
1533                                                 lpfc_cmd->prot_data_type =
1534                                                         LPFC_INJERR_REFTAG;
1535                                                 lpfc_cmd->prot_data_segment =
1536                                                         src;
1537                                                 lpfc_cmd->prot_data =
1538                                                         src->ref_tag;
1539                                         }
1540                                         src->ref_tag = cpu_to_be32(0xDEADBEEF);
1541                                         phba->lpfc_injerr_wref_cnt--;
1542                                         if (phba->lpfc_injerr_wref_cnt == 0) {
1543                                                 phba->lpfc_injerr_nportid = 0;
1544                                                 phba->lpfc_injerr_lba =
1545                                                         LPFC_INJERR_LBA_OFF;
1546                                                 memset(&phba->lpfc_injerr_wwpn,
1547                                                   0, sizeof(struct lpfc_name));
1548                                         }
1549                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1550
1551                                         break;
1552                                 }
1553                                 /* Drop thru */
1554                         case SCSI_PROT_WRITE_INSERT:
1555                                 /*
1556                                  * For WRITE_INSERT, force the error
1557                                  * to be sent on the wire. It should be
1558                                  * detected by the Target.
1559                                  */
1560                                 /* DEADBEEF will be the reftag on the wire */
1561                                 *reftag = 0xDEADBEEF;
1562                                 phba->lpfc_injerr_wref_cnt--;
1563                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1564                                         phba->lpfc_injerr_nportid = 0;
1565                                         phba->lpfc_injerr_lba =
1566                                         LPFC_INJERR_LBA_OFF;
1567                                         memset(&phba->lpfc_injerr_wwpn,
1568                                                 0, sizeof(struct lpfc_name));
1569                                 }
1570                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1571
1572                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1573                                         "9078 BLKGRD: Injecting reftag error: "
1574                                         "write lba x%lx\n", (unsigned long)lba);
1575                                 break;
1576                         case SCSI_PROT_WRITE_STRIP:
1577                                 /*
1578                                  * For WRITE_STRIP and WRITE_PASS,
1579                                  * force the error on data
1580                                  * being copied from SLI-Host to SLI-Port.
1581                                  */
1582                                 *reftag = 0xDEADBEEF;
1583                                 phba->lpfc_injerr_wref_cnt--;
1584                                 if (phba->lpfc_injerr_wref_cnt == 0) {
1585                                         phba->lpfc_injerr_nportid = 0;
1586                                         phba->lpfc_injerr_lba =
1587                                                 LPFC_INJERR_LBA_OFF;
1588                                         memset(&phba->lpfc_injerr_wwpn,
1589                                                 0, sizeof(struct lpfc_name));
1590                                 }
1591                                 rc = BG_ERR_INIT;
1592
1593                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1594                                         "9077 BLKGRD: Injecting reftag error: "
1595                                         "write lba x%lx\n", (unsigned long)lba);
1596                                 break;
1597                         }
1598                 }
1599                 if (phba->lpfc_injerr_rref_cnt) {
1600                         switch (op) {
1601                         case SCSI_PROT_READ_INSERT:
1602                         case SCSI_PROT_READ_STRIP:
1603                         case SCSI_PROT_READ_PASS:
1604                                 /*
1605                                  * For READ_STRIP and READ_PASS, force the
1606                                  * error on data being read off the wire. It
1607                                  * should force an IO error to the driver.
1608                                  */
1609                                 *reftag = 0xDEADBEEF;
1610                                 phba->lpfc_injerr_rref_cnt--;
1611                                 if (phba->lpfc_injerr_rref_cnt == 0) {
1612                                         phba->lpfc_injerr_nportid = 0;
1613                                         phba->lpfc_injerr_lba =
1614                                                 LPFC_INJERR_LBA_OFF;
1615                                         memset(&phba->lpfc_injerr_wwpn,
1616                                                 0, sizeof(struct lpfc_name));
1617                                 }
1618                                 rc = BG_ERR_INIT;
1619
1620                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1621                                         "9079 BLKGRD: Injecting reftag error: "
1622                                         "read lba x%lx\n", (unsigned long)lba);
1623                                 break;
1624                         }
1625                 }
1626         }
1627
1628         /* Should we change the Application Tag */
1629         if (apptag) {
1630                 if (phba->lpfc_injerr_wapp_cnt) {
1631                         switch (op) {
1632                         case SCSI_PROT_WRITE_PASS:
1633                                 if (src) {
1634                                         /*
1635                                          * For WRITE_PASS, force the error
1636                                          * to be sent on the wire. It should
1637                                          * be detected by the Target.
1638                                          * If blockoff != 0 error will be
1639                                          * inserted in middle of the IO.
1640                                          */
1641
1642                                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1643                                         "9080 BLKGRD: Injecting apptag error: "
1644                                         "write lba x%lx + x%x oldappTag x%x\n",
1645                                         (unsigned long)lba, blockoff,
1646                                         be16_to_cpu(src->app_tag));
1647
1648                                         /*
1649                                          * Save the old app_tag so we can
1650                                          * restore it on completion.
1651                                          */
1652                                         if (lpfc_cmd) {
1653                                                 lpfc_cmd->prot_data_type =
1654                                                         LPFC_INJERR_APPTAG;
1655                                                 lpfc_cmd->prot_data_segment =
1656                                                         src;
1657                                                 lpfc_cmd->prot_data =
1658                                                         src->app_tag;
1659                                         }
1660                                         src->app_tag = cpu_to_be16(0xDEAD);
1661                                         phba->lpfc_injerr_wapp_cnt--;
1662                                         if (phba->lpfc_injerr_wapp_cnt == 0) {
1663                                                 phba->lpfc_injerr_nportid = 0;
1664                                                 phba->lpfc_injerr_lba =
1665                                                         LPFC_INJERR_LBA_OFF;
1666                                                 memset(&phba->lpfc_injerr_wwpn,
1667                                                   0, sizeof(struct lpfc_name));
1668                                         }
1669                                         rc = BG_ERR_TGT | BG_ERR_CHECK;
1670                                         break;
1671                                 }
1672                                 /* Drop thru */
1673                         case SCSI_PROT_WRITE_INSERT:
1674                                 /*
1675                                  * For WRITE_INSERT, force the
1676                                  * error to be sent on the wire. It should be
1677                                  * detected by the Target.
1678                                  */
1679                                 /* DEAD will be the apptag on the wire */
1680                                 *apptag = 0xDEAD;
1681                                 phba->lpfc_injerr_wapp_cnt--;
1682                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1683                                         phba->lpfc_injerr_nportid = 0;
1684                                         phba->lpfc_injerr_lba =
1685                                                 LPFC_INJERR_LBA_OFF;
1686                                         memset(&phba->lpfc_injerr_wwpn,
1687                                                 0, sizeof(struct lpfc_name));
1688                                 }
1689                                 rc = BG_ERR_TGT | BG_ERR_CHECK;
1690
1691                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1692                                         "0813 BLKGRD: Injecting apptag error: "
1693                                         "write lba x%lx\n", (unsigned long)lba);
1694                                 break;
1695                         case SCSI_PROT_WRITE_STRIP:
1696                                 /*
1697                                  * For WRITE_STRIP and WRITE_PASS,
1698                                  * force the error on data
1699                                  * being copied from SLI-Host to SLI-Port.
1700                                  */
1701                                 *apptag = 0xDEAD;
1702                                 phba->lpfc_injerr_wapp_cnt--;
1703                                 if (phba->lpfc_injerr_wapp_cnt == 0) {
1704                                         phba->lpfc_injerr_nportid = 0;
1705                                         phba->lpfc_injerr_lba =
1706                                                 LPFC_INJERR_LBA_OFF;
1707                                         memset(&phba->lpfc_injerr_wwpn,
1708                                                 0, sizeof(struct lpfc_name));
1709                                 }
1710                                 rc = BG_ERR_INIT;
1711
1712                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1713                                         "0812 BLKGRD: Injecting apptag error: "
1714                                         "write lba x%lx\n", (unsigned long)lba);
1715                                 break;
1716                         }
1717                 }
1718                 if (phba->lpfc_injerr_rapp_cnt) {
1719                         switch (op) {
1720                         case SCSI_PROT_READ_INSERT:
1721                         case SCSI_PROT_READ_STRIP:
1722                         case SCSI_PROT_READ_PASS:
1723                                 /*
1724                                  * For READ_STRIP and READ_PASS, force the
1725                                  * error on data being read off the wire. It
1726                                  * should force an IO error to the driver.
1727                                  */
1728                                 *apptag = 0xDEAD;
1729                                 phba->lpfc_injerr_rapp_cnt--;
1730                                 if (phba->lpfc_injerr_rapp_cnt == 0) {
1731                                         phba->lpfc_injerr_nportid = 0;
1732                                         phba->lpfc_injerr_lba =
1733                                                 LPFC_INJERR_LBA_OFF;
1734                                         memset(&phba->lpfc_injerr_wwpn,
1735                                                 0, sizeof(struct lpfc_name));
1736                                 }
1737                                 rc = BG_ERR_INIT;
1738
1739                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1740                                         "0814 BLKGRD: Injecting apptag error: "
1741                                         "read lba x%lx\n", (unsigned long)lba);
1742                                 break;
1743                         }
1744                 }
1745         }
1746
1747
1748         /* Should we change the Guard Tag */
1749         if (new_guard) {
1750                 if (phba->lpfc_injerr_wgrd_cnt) {
1751                         switch (op) {
1752                         case SCSI_PROT_WRITE_PASS:
1753                                 rc = BG_ERR_CHECK;
1754                                 /* Drop thru */
1755
1756                         case SCSI_PROT_WRITE_INSERT:
1757                                 /*
1758                                  * For WRITE_INSERT, force the
1759                                  * error to be sent on the wire. It should be
1760                                  * detected by the Target.
1761                                  */
1762                                 phba->lpfc_injerr_wgrd_cnt--;
1763                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1764                                         phba->lpfc_injerr_nportid = 0;
1765                                         phba->lpfc_injerr_lba =
1766                                                 LPFC_INJERR_LBA_OFF;
1767                                         memset(&phba->lpfc_injerr_wwpn,
1768                                                 0, sizeof(struct lpfc_name));
1769                                 }
1770
1771                                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
1772                                 /* Signals the caller to swap CRC->CSUM */
1773
1774                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1775                                         "0817 BLKGRD: Injecting guard error: "
1776                                         "write lba x%lx\n", (unsigned long)lba);
1777                                 break;
1778                         case SCSI_PROT_WRITE_STRIP:
1779                                 /*
1780                                  * For WRITE_STRIP and WRITE_PASS,
1781                                  * force the error on data
1782                                  * being copied from SLI-Host to SLI-Port.
1783                                  */
1784                                 phba->lpfc_injerr_wgrd_cnt--;
1785                                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
1786                                         phba->lpfc_injerr_nportid = 0;
1787                                         phba->lpfc_injerr_lba =
1788                                                 LPFC_INJERR_LBA_OFF;
1789                                         memset(&phba->lpfc_injerr_wwpn,
1790                                                 0, sizeof(struct lpfc_name));
1791                                 }
1792
1793                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1794                                 /* Signals the caller to swap CRC->CSUM */
1795
1796                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1797                                         "0816 BLKGRD: Injecting guard error: "
1798                                         "write lba x%lx\n", (unsigned long)lba);
1799                                 break;
1800                         }
1801                 }
1802                 if (phba->lpfc_injerr_rgrd_cnt) {
1803                         switch (op) {
1804                         case SCSI_PROT_READ_INSERT:
1805                         case SCSI_PROT_READ_STRIP:
1806                         case SCSI_PROT_READ_PASS:
1807                                 /*
1808                                  * For READ_STRIP and READ_PASS, force the
1809                                  * error on data being read off the wire. It
1810                                  * should force an IO error to the driver.
1811                                  */
1812                                 phba->lpfc_injerr_rgrd_cnt--;
1813                                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
1814                                         phba->lpfc_injerr_nportid = 0;
1815                                         phba->lpfc_injerr_lba =
1816                                                 LPFC_INJERR_LBA_OFF;
1817                                         memset(&phba->lpfc_injerr_wwpn,
1818                                                 0, sizeof(struct lpfc_name));
1819                                 }
1820
1821                                 rc = BG_ERR_INIT | BG_ERR_SWAP;
1822                                 /* Signals the caller to swap CRC->CSUM */
1823
1824                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1825                                         "0818 BLKGRD: Injecting guard error: "
1826                                         "read lba x%lx\n", (unsigned long)lba);
1827                         }
1828                 }
1829         }
1830
1831         return rc;
1832 }
1833 #endif
1834
1835 /**
1836  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
1837  * the specified SCSI command.
1838  * @phba: The Hba for which this call is being executed.
1839  * @sc: The SCSI command to examine
1840  * @txopt: (out) BlockGuard operation for transmitted data
1841  * @rxopt: (out) BlockGuard operation for received data
1842  *
1843  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1844  *
1845  **/
1846 static int
1847 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1848                 uint8_t *txop, uint8_t *rxop)
1849 {
1850         uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1851         uint8_t ret = 0;
1852
1853         if (guard_type == SHOST_DIX_GUARD_IP) {
1854                 switch (scsi_get_prot_op(sc)) {
1855                 case SCSI_PROT_READ_INSERT:
1856                 case SCSI_PROT_WRITE_STRIP:
1857                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1858                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1859                         break;
1860
1861                 case SCSI_PROT_READ_STRIP:
1862                 case SCSI_PROT_WRITE_INSERT:
1863                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1864                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1865                         break;
1866
1867                 case SCSI_PROT_READ_PASS:
1868                 case SCSI_PROT_WRITE_PASS:
1869                         *rxop = BG_OP_IN_CRC_OUT_CSUM;
1870                         *txop = BG_OP_IN_CSUM_OUT_CRC;
1871                         break;
1872
1873                 case SCSI_PROT_NORMAL:
1874                 default:
1875                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1876                                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
1877                                         scsi_get_prot_op(sc));
1878                         ret = 1;
1879                         break;
1880
1881                 }
1882         } else {
1883                 switch (scsi_get_prot_op(sc)) {
1884                 case SCSI_PROT_READ_STRIP:
1885                 case SCSI_PROT_WRITE_INSERT:
1886                         *rxop = BG_OP_IN_CRC_OUT_NODIF;
1887                         *txop = BG_OP_IN_NODIF_OUT_CRC;
1888                         break;
1889
1890                 case SCSI_PROT_READ_PASS:
1891                 case SCSI_PROT_WRITE_PASS:
1892                         *rxop = BG_OP_IN_CRC_OUT_CRC;
1893                         *txop = BG_OP_IN_CRC_OUT_CRC;
1894                         break;
1895
1896                 case SCSI_PROT_READ_INSERT:
1897                 case SCSI_PROT_WRITE_STRIP:
1898                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1899                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1900                         break;
1901
1902                 case SCSI_PROT_NORMAL:
1903                 default:
1904                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1905                                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
1906                                         scsi_get_prot_op(sc));
1907                         ret = 1;
1908                         break;
1909                 }
1910         }
1911
1912         return ret;
1913 }
1914
1915 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1916 /**
1917  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
1918  * the specified SCSI command in order to force a guard tag error.
1919  * @phba: The Hba for which this call is being executed.
1920  * @sc: The SCSI command to examine
1921  * @txopt: (out) BlockGuard operation for transmitted data
1922  * @rxopt: (out) BlockGuard operation for received data
1923  *
1924  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
1925  *
1926  **/
1927 static int
1928 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
1929                 uint8_t *txop, uint8_t *rxop)
1930 {
1931         uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1932         uint8_t ret = 0;
1933
1934         if (guard_type == SHOST_DIX_GUARD_IP) {
1935                 switch (scsi_get_prot_op(sc)) {
1936                 case SCSI_PROT_READ_INSERT:
1937                 case SCSI_PROT_WRITE_STRIP:
1938                         *rxop = BG_OP_IN_NODIF_OUT_CRC;
1939                         *txop = BG_OP_IN_CRC_OUT_NODIF;
1940                         break;
1941
1942                 case SCSI_PROT_READ_STRIP:
1943                 case SCSI_PROT_WRITE_INSERT:
1944                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1945                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1946                         break;
1947
1948                 case SCSI_PROT_READ_PASS:
1949                 case SCSI_PROT_WRITE_PASS:
1950                         *rxop = BG_OP_IN_CSUM_OUT_CRC;
1951                         *txop = BG_OP_IN_CRC_OUT_CSUM;
1952                         break;
1953
1954                 case SCSI_PROT_NORMAL:
1955                 default:
1956                         break;
1957
1958                 }
1959         } else {
1960                 switch (scsi_get_prot_op(sc)) {
1961                 case SCSI_PROT_READ_STRIP:
1962                 case SCSI_PROT_WRITE_INSERT:
1963                         *rxop = BG_OP_IN_CSUM_OUT_NODIF;
1964                         *txop = BG_OP_IN_NODIF_OUT_CSUM;
1965                         break;
1966
1967                 case SCSI_PROT_READ_PASS:
1968                 case SCSI_PROT_WRITE_PASS:
1969                         *rxop = BG_OP_IN_CSUM_OUT_CSUM;
1970                         *txop = BG_OP_IN_CSUM_OUT_CSUM;
1971                         break;
1972
1973                 case SCSI_PROT_READ_INSERT:
1974                 case SCSI_PROT_WRITE_STRIP:
1975                         *rxop = BG_OP_IN_NODIF_OUT_CSUM;
1976                         *txop = BG_OP_IN_CSUM_OUT_NODIF;
1977                         break;
1978
1979                 case SCSI_PROT_NORMAL:
1980                 default:
1981                         break;
1982                 }
1983         }
1984
1985         return ret;
1986 }
1987 #endif
1988
1989 /**
1990  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
1991  * @phba: The Hba for which this call is being executed.
1992  * @sc: pointer to scsi command we're working on
1993  * @bpl: pointer to buffer list for protection groups
1994  * @datacnt: number of segments of data that have been dma mapped
1995  *
1996  * This function sets up BPL buffer list for protection groups of
1997  * type LPFC_PG_TYPE_NO_DIF
1998  *
1999  * This is usually used when the HBA is instructed to generate
2000  * DIFs and insert them into data stream (or strip DIF from
2001  * incoming data stream)
2002  *
2003  * The buffer list consists of just one protection group described
2004  * below:
2005  *                                +-------------------------+
2006  *   start of prot group  -->     |          PDE_5          |
2007  *                                +-------------------------+
2008  *                                |          PDE_6          |
2009  *                                +-------------------------+
2010  *                                |         Data BDE        |
2011  *                                +-------------------------+
2012  *                                |more Data BDE's ... (opt)|
2013  *                                +-------------------------+
2014  *
2015  *
2016  * Note: Data s/g buffers have been dma mapped
2017  *
2018  * Returns the number of BDEs added to the BPL.
2019  **/
2020 static int
2021 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2022                 struct ulp_bde64 *bpl, int datasegcnt)
2023 {
2024         struct scatterlist *sgde = NULL; /* s/g data entry */
2025         struct lpfc_pde5 *pde5 = NULL;
2026         struct lpfc_pde6 *pde6 = NULL;
2027         dma_addr_t physaddr;
2028         int i = 0, num_bde = 0, status;
2029         int datadir = sc->sc_data_direction;
2030 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2031         uint32_t rc;
2032 #endif
2033         uint32_t checking = 1;
2034         uint32_t reftag;
2035         unsigned blksize;
2036         uint8_t txop, rxop;
2037
2038         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2039         if (status)
2040                 goto out;
2041
2042         /* extract some info from the scsi command for pde*/
2043         blksize = lpfc_cmd_blksize(sc);
2044         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2045
2046 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2047         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2048         if (rc) {
2049                 if (rc & BG_ERR_SWAP)
2050                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2051                 if (rc & BG_ERR_CHECK)
2052                         checking = 0;
2053         }
2054 #endif
2055
2056         /* setup PDE5 with what we have */
2057         pde5 = (struct lpfc_pde5 *) bpl;
2058         memset(pde5, 0, sizeof(struct lpfc_pde5));
2059         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2060
2061         /* Endianness conversion if necessary for PDE5 */
2062         pde5->word0 = cpu_to_le32(pde5->word0);
2063         pde5->reftag = cpu_to_le32(reftag);
2064
2065         /* advance bpl and increment bde count */
2066         num_bde++;
2067         bpl++;
2068         pde6 = (struct lpfc_pde6 *) bpl;
2069
2070         /* setup PDE6 with the rest of the info */
2071         memset(pde6, 0, sizeof(struct lpfc_pde6));
2072         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2073         bf_set(pde6_optx, pde6, txop);
2074         bf_set(pde6_oprx, pde6, rxop);
2075
2076         /*
2077          * We only need to check the data on READs, for WRITEs
2078          * protection data is automatically generated, not checked.
2079          */
2080         if (datadir == DMA_FROM_DEVICE) {
2081                 if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
2082                         bf_set(pde6_ce, pde6, checking);
2083                 else
2084                         bf_set(pde6_ce, pde6, 0);
2085
2086                 if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
2087                         bf_set(pde6_re, pde6, checking);
2088                 else
2089                         bf_set(pde6_re, pde6, 0);
2090         }
2091         bf_set(pde6_ai, pde6, 1);
2092         bf_set(pde6_ae, pde6, 0);
2093         bf_set(pde6_apptagval, pde6, 0);
2094
2095         /* Endianness conversion if necessary for PDE6 */
2096         pde6->word0 = cpu_to_le32(pde6->word0);
2097         pde6->word1 = cpu_to_le32(pde6->word1);
2098         pde6->word2 = cpu_to_le32(pde6->word2);
2099
2100         /* advance bpl and increment bde count */
2101         num_bde++;
2102         bpl++;
2103
2104         /* assumption: caller has already run dma_map_sg on command data */
2105         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2106                 physaddr = sg_dma_address(sgde);
2107                 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
2108                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
2109                 bpl->tus.f.bdeSize = sg_dma_len(sgde);
2110                 if (datadir == DMA_TO_DEVICE)
2111                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2112                 else
2113                         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2114                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
2115                 bpl++;
2116                 num_bde++;
2117         }
2118
2119 out:
2120         return num_bde;
2121 }
2122
2123 /**
2124  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
2125  * @phba: The Hba for which this call is being executed.
2126  * @sc: pointer to scsi command we're working on
2127  * @bpl: pointer to buffer list for protection groups
2128  * @datacnt: number of segments of data that have been dma mapped
2129  * @protcnt: number of segment of protection data that have been dma mapped
2130  *
2131  * This function sets up BPL buffer list for protection groups of
2132  * type LPFC_PG_TYPE_DIF
2133  *
2134  * This is usually used when DIFs are in their own buffers,
2135  * separate from the data. The HBA can then by instructed
2136  * to place the DIFs in the outgoing stream.  For read operations,
2137  * The HBA could extract the DIFs and place it in DIF buffers.
2138  *
2139  * The buffer list for this type consists of one or more of the
2140  * protection groups described below:
2141  *                                    +-------------------------+
2142  *   start of first prot group  -->   |          PDE_5          |
2143  *                                    +-------------------------+
2144  *                                    |          PDE_6          |
2145  *                                    +-------------------------+
2146  *                                    |      PDE_7 (Prot BDE)   |
2147  *                                    +-------------------------+
2148  *                                    |        Data BDE         |
2149  *                                    +-------------------------+
2150  *                                    |more Data BDE's ... (opt)|
2151  *                                    +-------------------------+
2152  *   start of new  prot group  -->    |          PDE_5          |
2153  *                                    +-------------------------+
2154  *                                    |          ...            |
2155  *                                    +-------------------------+
2156  *
2157  * Note: It is assumed that both data and protection s/g buffers have been
2158  *       mapped for DMA
2159  *
2160  * Returns the number of BDEs added to the BPL.
2161  **/
2162 static int
2163 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2164                 struct ulp_bde64 *bpl, int datacnt, int protcnt)
2165 {
2166         struct scatterlist *sgde = NULL; /* s/g data entry */
2167         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2168         struct lpfc_pde5 *pde5 = NULL;
2169         struct lpfc_pde6 *pde6 = NULL;
2170         struct lpfc_pde7 *pde7 = NULL;
2171         dma_addr_t dataphysaddr, protphysaddr;
2172         unsigned short curr_data = 0, curr_prot = 0;
2173         unsigned int split_offset;
2174         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2175         unsigned int protgrp_blks, protgrp_bytes;
2176         unsigned int remainder, subtotal;
2177         int status;
2178         int datadir = sc->sc_data_direction;
2179         unsigned char pgdone = 0, alldone = 0;
2180         unsigned blksize;
2181 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2182         uint32_t rc;
2183 #endif
2184         uint32_t checking = 1;
2185         uint32_t reftag;
2186         uint8_t txop, rxop;
2187         int num_bde = 0;
2188
2189         sgpe = scsi_prot_sglist(sc);
2190         sgde = scsi_sglist(sc);
2191
2192         if (!sgpe || !sgde) {
2193                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2194                                 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
2195                                 sgpe, sgde);
2196                 return 0;
2197         }
2198
2199         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2200         if (status)
2201                 goto out;
2202
2203         /* extract some info from the scsi command */
2204         blksize = lpfc_cmd_blksize(sc);
2205         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2206
2207 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2208         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2209         if (rc) {
2210                 if (rc & BG_ERR_SWAP)
2211                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2212                 if (rc & BG_ERR_CHECK)
2213                         checking = 0;
2214         }
2215 #endif
2216
2217         split_offset = 0;
2218         do {
2219                 /* Check to see if we ran out of space */
2220                 if (num_bde >= (phba->cfg_total_seg_cnt - 2))
2221                         return num_bde + 3;
2222
2223                 /* setup PDE5 with what we have */
2224                 pde5 = (struct lpfc_pde5 *) bpl;
2225                 memset(pde5, 0, sizeof(struct lpfc_pde5));
2226                 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
2227
2228                 /* Endianness conversion if necessary for PDE5 */
2229                 pde5->word0 = cpu_to_le32(pde5->word0);
2230                 pde5->reftag = cpu_to_le32(reftag);
2231
2232                 /* advance bpl and increment bde count */
2233                 num_bde++;
2234                 bpl++;
2235                 pde6 = (struct lpfc_pde6 *) bpl;
2236
2237                 /* setup PDE6 with the rest of the info */
2238                 memset(pde6, 0, sizeof(struct lpfc_pde6));
2239                 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
2240                 bf_set(pde6_optx, pde6, txop);
2241                 bf_set(pde6_oprx, pde6, rxop);
2242
2243                 if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
2244                         bf_set(pde6_ce, pde6, checking);
2245                 else
2246                         bf_set(pde6_ce, pde6, 0);
2247
2248                 if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
2249                         bf_set(pde6_re, pde6, checking);
2250                 else
2251                         bf_set(pde6_re, pde6, 0);
2252
2253                 bf_set(pde6_ai, pde6, 1);
2254                 bf_set(pde6_ae, pde6, 0);
2255                 bf_set(pde6_apptagval, pde6, 0);
2256
2257                 /* Endianness conversion if necessary for PDE6 */
2258                 pde6->word0 = cpu_to_le32(pde6->word0);
2259                 pde6->word1 = cpu_to_le32(pde6->word1);
2260                 pde6->word2 = cpu_to_le32(pde6->word2);
2261
2262                 /* advance bpl and increment bde count */
2263                 num_bde++;
2264                 bpl++;
2265
2266                 /* setup the first BDE that points to protection buffer */
2267                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2268                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2269
2270                 /* must be integer multiple of the DIF block length */
2271                 BUG_ON(protgroup_len % 8);
2272
2273                 pde7 = (struct lpfc_pde7 *) bpl;
2274                 memset(pde7, 0, sizeof(struct lpfc_pde7));
2275                 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
2276
2277                 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
2278                 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
2279
2280                 protgrp_blks = protgroup_len / 8;
2281                 protgrp_bytes = protgrp_blks * blksize;
2282
2283                 /* check if this pde is crossing the 4K boundary; if so split */
2284                 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
2285                         protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
2286                         protgroup_offset += protgroup_remainder;
2287                         protgrp_blks = protgroup_remainder / 8;
2288                         protgrp_bytes = protgrp_blks * blksize;
2289                 } else {
2290                         protgroup_offset = 0;
2291                         curr_prot++;
2292                 }
2293
2294                 num_bde++;
2295
2296                 /* setup BDE's for data blocks associated with DIF data */
2297                 pgdone = 0;
2298                 subtotal = 0; /* total bytes processed for current prot grp */
2299                 while (!pgdone) {
2300                         /* Check to see if we ran out of space */
2301                         if (num_bde >= phba->cfg_total_seg_cnt)
2302                                 return num_bde + 1;
2303
2304                         if (!sgde) {
2305                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2306                                         "9065 BLKGRD:%s Invalid data segment\n",
2307                                                 __func__);
2308                                 return 0;
2309                         }
2310                         bpl++;
2311                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2312                         bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
2313                         bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
2314
2315                         remainder = sg_dma_len(sgde) - split_offset;
2316
2317                         if ((subtotal + remainder) <= protgrp_bytes) {
2318                                 /* we can use this whole buffer */
2319                                 bpl->tus.f.bdeSize = remainder;
2320                                 split_offset = 0;
2321
2322                                 if ((subtotal + remainder) == protgrp_bytes)
2323                                         pgdone = 1;
2324                         } else {
2325                                 /* must split this buffer with next prot grp */
2326                                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
2327                                 split_offset += bpl->tus.f.bdeSize;
2328                         }
2329
2330                         subtotal += bpl->tus.f.bdeSize;
2331
2332                         if (datadir == DMA_TO_DEVICE)
2333                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2334                         else
2335                                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
2336                         bpl->tus.w = le32_to_cpu(bpl->tus.w);
2337
2338                         num_bde++;
2339                         curr_data++;
2340
2341                         if (split_offset)
2342                                 break;
2343
2344                         /* Move to the next s/g segment if possible */
2345                         sgde = sg_next(sgde);
2346
2347                 }
2348
2349                 if (protgroup_offset) {
2350                         /* update the reference tag */
2351                         reftag += protgrp_blks;
2352                         bpl++;
2353                         continue;
2354                 }
2355
2356                 /* are we done ? */
2357                 if (curr_prot == protcnt) {
2358                         alldone = 1;
2359                 } else if (curr_prot < protcnt) {
2360                         /* advance to next prot buffer */
2361                         sgpe = sg_next(sgpe);
2362                         bpl++;
2363
2364                         /* update the reference tag */
2365                         reftag += protgrp_blks;
2366                 } else {
2367                         /* if we're here, we have a bug */
2368                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2369                                 "9054 BLKGRD: bug in %s\n", __func__);
2370                 }
2371
2372         } while (!alldone);
2373 out:
2374
2375         return num_bde;
2376 }
2377
2378 /**
2379  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
2380  * @phba: The Hba for which this call is being executed.
2381  * @sc: pointer to scsi command we're working on
2382  * @sgl: pointer to buffer list for protection groups
2383  * @datacnt: number of segments of data that have been dma mapped
2384  *
2385  * This function sets up SGL buffer list for protection groups of
2386  * type LPFC_PG_TYPE_NO_DIF
2387  *
2388  * This is usually used when the HBA is instructed to generate
2389  * DIFs and insert them into data stream (or strip DIF from
2390  * incoming data stream)
2391  *
2392  * The buffer list consists of just one protection group described
2393  * below:
2394  *                                +-------------------------+
2395  *   start of prot group  -->     |         DI_SEED         |
2396  *                                +-------------------------+
2397  *                                |         Data SGE        |
2398  *                                +-------------------------+
2399  *                                |more Data SGE's ... (opt)|
2400  *                                +-------------------------+
2401  *
2402  *
2403  * Note: Data s/g buffers have been dma mapped
2404  *
2405  * Returns the number of SGEs added to the SGL.
2406  **/
2407 static int
2408 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2409                 struct sli4_sge *sgl, int datasegcnt)
2410 {
2411         struct scatterlist *sgde = NULL; /* s/g data entry */
2412         struct sli4_sge_diseed *diseed = NULL;
2413         dma_addr_t physaddr;
2414         int i = 0, num_sge = 0, status;
2415         uint32_t reftag;
2416         unsigned blksize;
2417         uint8_t txop, rxop;
2418 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2419         uint32_t rc;
2420 #endif
2421         uint32_t checking = 1;
2422         uint32_t dma_len;
2423         uint32_t dma_offset = 0;
2424
2425         status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2426         if (status)
2427                 goto out;
2428
2429         /* extract some info from the scsi command for pde*/
2430         blksize = lpfc_cmd_blksize(sc);
2431         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2432
2433 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2434         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2435         if (rc) {
2436                 if (rc & BG_ERR_SWAP)
2437                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2438                 if (rc & BG_ERR_CHECK)
2439                         checking = 0;
2440         }
2441 #endif
2442
2443         /* setup DISEED with what we have */
2444         diseed = (struct sli4_sge_diseed *) sgl;
2445         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2446         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2447
2448         /* Endianness conversion if necessary */
2449         diseed->ref_tag = cpu_to_le32(reftag);
2450         diseed->ref_tag_tran = diseed->ref_tag;
2451
2452         /*
2453          * We only need to check the data on READs, for WRITEs
2454          * protection data is automatically generated, not checked.
2455          */
2456         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2457                 if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
2458                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2459                 else
2460                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2461
2462                 if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
2463                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2464                 else
2465                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2466         }
2467
2468         /* setup DISEED with the rest of the info */
2469         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2470         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2471
2472         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2473         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2474
2475         /* Endianness conversion if necessary for DISEED */
2476         diseed->word2 = cpu_to_le32(diseed->word2);
2477         diseed->word3 = cpu_to_le32(diseed->word3);
2478
2479         /* advance bpl and increment sge count */
2480         num_sge++;
2481         sgl++;
2482
2483         /* assumption: caller has already run dma_map_sg on command data */
2484         scsi_for_each_sg(sc, sgde, datasegcnt, i) {
2485                 physaddr = sg_dma_address(sgde);
2486                 dma_len = sg_dma_len(sgde);
2487                 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
2488                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
2489                 if ((i + 1) == datasegcnt)
2490                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2491                 else
2492                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2493                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2494                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2495
2496                 sgl->sge_len = cpu_to_le32(dma_len);
2497                 dma_offset += dma_len;
2498
2499                 sgl++;
2500                 num_sge++;
2501         }
2502
2503 out:
2504         return num_sge;
2505 }
2506
2507 /**
2508  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
2509  * @phba: The Hba for which this call is being executed.
2510  * @sc: pointer to scsi command we're working on
2511  * @sgl: pointer to buffer list for protection groups
2512  * @datacnt: number of segments of data that have been dma mapped
2513  * @protcnt: number of segment of protection data that have been dma mapped
2514  *
2515  * This function sets up SGL buffer list for protection groups of
2516  * type LPFC_PG_TYPE_DIF
2517  *
2518  * This is usually used when DIFs are in their own buffers,
2519  * separate from the data. The HBA can then by instructed
2520  * to place the DIFs in the outgoing stream.  For read operations,
2521  * The HBA could extract the DIFs and place it in DIF buffers.
2522  *
2523  * The buffer list for this type consists of one or more of the
2524  * protection groups described below:
2525  *                                    +-------------------------+
2526  *   start of first prot group  -->   |         DISEED          |
2527  *                                    +-------------------------+
2528  *                                    |      DIF (Prot SGE)     |
2529  *                                    +-------------------------+
2530  *                                    |        Data SGE         |
2531  *                                    +-------------------------+
2532  *                                    |more Data SGE's ... (opt)|
2533  *                                    +-------------------------+
2534  *   start of new  prot group  -->    |         DISEED          |
2535  *                                    +-------------------------+
2536  *                                    |          ...            |
2537  *                                    +-------------------------+
2538  *
2539  * Note: It is assumed that both data and protection s/g buffers have been
2540  *       mapped for DMA
2541  *
2542  * Returns the number of SGEs added to the SGL.
2543  **/
2544 static int
2545 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
2546                 struct sli4_sge *sgl, int datacnt, int protcnt)
2547 {
2548         struct scatterlist *sgde = NULL; /* s/g data entry */
2549         struct scatterlist *sgpe = NULL; /* s/g prot entry */
2550         struct sli4_sge_diseed *diseed = NULL;
2551         dma_addr_t dataphysaddr, protphysaddr;
2552         unsigned short curr_data = 0, curr_prot = 0;
2553         unsigned int split_offset;
2554         unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
2555         unsigned int protgrp_blks, protgrp_bytes;
2556         unsigned int remainder, subtotal;
2557         int status;
2558         unsigned char pgdone = 0, alldone = 0;
2559         unsigned blksize;
2560         uint32_t reftag;
2561         uint8_t txop, rxop;
2562         uint32_t dma_len;
2563 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2564         uint32_t rc;
2565 #endif
2566         uint32_t checking = 1;
2567         uint32_t dma_offset = 0;
2568         int num_sge = 0;
2569
2570         sgpe = scsi_prot_sglist(sc);
2571         sgde = scsi_sglist(sc);
2572
2573         if (!sgpe || !sgde) {
2574                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2575                                 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n",
2576                                 sgpe, sgde);
2577                 return 0;
2578         }
2579
2580         status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
2581         if (status)
2582                 goto out;
2583
2584         /* extract some info from the scsi command */
2585         blksize = lpfc_cmd_blksize(sc);
2586         reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
2587
2588 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2589         rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
2590         if (rc) {
2591                 if (rc & BG_ERR_SWAP)
2592                         lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
2593                 if (rc & BG_ERR_CHECK)
2594                         checking = 0;
2595         }
2596 #endif
2597
2598         split_offset = 0;
2599         do {
2600                 /* Check to see if we ran out of space */
2601                 if (num_sge >= (phba->cfg_total_seg_cnt - 2))
2602                         return num_sge + 3;
2603
2604                 /* setup DISEED with what we have */
2605                 diseed = (struct sli4_sge_diseed *) sgl;
2606                 memset(diseed, 0, sizeof(struct sli4_sge_diseed));
2607                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
2608
2609                 /* Endianness conversion if necessary */
2610                 diseed->ref_tag = cpu_to_le32(reftag);
2611                 diseed->ref_tag_tran = diseed->ref_tag;
2612
2613                 if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK)) {
2614                         bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
2615
2616                 } else {
2617                         bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
2618                         /*
2619                          * When in this mode, the hardware will replace
2620                          * the guard tag from the host with a
2621                          * newly generated good CRC for the wire.
2622                          * Switch to raw mode here to avoid this
2623                          * behavior. What the host sends gets put on the wire.
2624                          */
2625                         if (txop == BG_OP_IN_CRC_OUT_CRC) {
2626                                 txop = BG_OP_RAW_MODE;
2627                                 rxop = BG_OP_RAW_MODE;
2628                         }
2629                 }
2630
2631
2632                 if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
2633                         bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
2634                 else
2635                         bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
2636
2637                 /* setup DISEED with the rest of the info */
2638                 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
2639                 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
2640
2641                 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
2642                 bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
2643
2644                 /* Endianness conversion if necessary for DISEED */
2645                 diseed->word2 = cpu_to_le32(diseed->word2);
2646                 diseed->word3 = cpu_to_le32(diseed->word3);
2647
2648                 /* advance sgl and increment bde count */
2649                 num_sge++;
2650                 sgl++;
2651
2652                 /* setup the first BDE that points to protection buffer */
2653                 protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
2654                 protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
2655
2656                 /* must be integer multiple of the DIF block length */
2657                 BUG_ON(protgroup_len % 8);
2658
2659                 /* Now setup DIF SGE */
2660                 sgl->word2 = 0;
2661                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
2662                 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
2663                 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
2664                 sgl->word2 = cpu_to_le32(sgl->word2);
2665
2666                 protgrp_blks = protgroup_len / 8;
2667                 protgrp_bytes = protgrp_blks * blksize;
2668
2669                 /* check if DIF SGE is crossing the 4K boundary; if so split */
2670                 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
2671                         protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
2672                         protgroup_offset += protgroup_remainder;
2673                         protgrp_blks = protgroup_remainder / 8;
2674                         protgrp_bytes = protgrp_blks * blksize;
2675                 } else {
2676                         protgroup_offset = 0;
2677                         curr_prot++;
2678                 }
2679
2680                 num_sge++;
2681
2682                 /* setup SGE's for data blocks associated with DIF data */
2683                 pgdone = 0;
2684                 subtotal = 0; /* total bytes processed for current prot grp */
2685                 while (!pgdone) {
2686                         /* Check to see if we ran out of space */
2687                         if (num_sge >= phba->cfg_total_seg_cnt)
2688                                 return num_sge + 1;
2689
2690                         if (!sgde) {
2691                                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2692                                         "9086 BLKGRD:%s Invalid data segment\n",
2693                                                 __func__);
2694                                 return 0;
2695                         }
2696                         sgl++;
2697                         dataphysaddr = sg_dma_address(sgde) + split_offset;
2698
2699                         remainder = sg_dma_len(sgde) - split_offset;
2700
2701                         if ((subtotal + remainder) <= protgrp_bytes) {
2702                                 /* we can use this whole buffer */
2703                                 dma_len = remainder;
2704                                 split_offset = 0;
2705
2706                                 if ((subtotal + remainder) == protgrp_bytes)
2707                                         pgdone = 1;
2708                         } else {
2709                                 /* must split this buffer with next prot grp */
2710                                 dma_len = protgrp_bytes - subtotal;
2711                                 split_offset += dma_len;
2712                         }
2713
2714                         subtotal += dma_len;
2715
2716                         sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr));
2717                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr));
2718                         bf_set(lpfc_sli4_sge_last, sgl, 0);
2719                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
2720                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
2721
2722                         sgl->sge_len = cpu_to_le32(dma_len);
2723                         dma_offset += dma_len;
2724
2725                         num_sge++;
2726                         curr_data++;
2727
2728                         if (split_offset)
2729                                 break;
2730
2731                         /* Move to the next s/g segment if possible */
2732                         sgde = sg_next(sgde);
2733                 }
2734
2735                 if (protgroup_offset) {
2736                         /* update the reference tag */
2737                         reftag += protgrp_blks;
2738                         sgl++;
2739                         continue;
2740                 }
2741
2742                 /* are we done ? */
2743                 if (curr_prot == protcnt) {
2744                         bf_set(lpfc_sli4_sge_last, sgl, 1);
2745                         alldone = 1;
2746                 } else if (curr_prot < protcnt) {
2747                         /* advance to next prot buffer */
2748                         sgpe = sg_next(sgpe);
2749                         sgl++;
2750
2751                         /* update the reference tag */
2752                         reftag += protgrp_blks;
2753                 } else {
2754                         /* if we're here, we have a bug */
2755                         lpfc_printf_log(phba, KERN_ERR, LOG_BG,
2756                                 "9085 BLKGRD: bug in %s\n", __func__);
2757                 }
2758
2759         } while (!alldone);
2760
2761 out:
2762
2763         return num_sge;
2764 }
2765
2766 /**
2767  * lpfc_prot_group_type - Get prtotection group type of SCSI command
2768  * @phba: The Hba for which this call is being executed.
2769  * @sc: pointer to scsi command we're working on
2770  *
2771  * Given a SCSI command that supports DIF, determine composition of protection
2772  * groups involved in setting up buffer lists
2773  *
2774  * Returns: Protection group type (with or without DIF)
2775  *
2776  **/
2777 static int
2778 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
2779 {
2780         int ret = LPFC_PG_TYPE_INVALID;
2781         unsigned char op = scsi_get_prot_op(sc);
2782
2783         switch (op) {
2784         case SCSI_PROT_READ_STRIP:
2785         case SCSI_PROT_WRITE_INSERT:
2786                 ret = LPFC_PG_TYPE_NO_DIF;
2787                 break;
2788         case SCSI_PROT_READ_INSERT:
2789         case SCSI_PROT_WRITE_STRIP:
2790         case SCSI_PROT_READ_PASS:
2791         case SCSI_PROT_WRITE_PASS:
2792                 ret = LPFC_PG_TYPE_DIF_BUF;
2793                 break;
2794         default:
2795                 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2796                                 "9021 Unsupported protection op:%d\n", op);
2797                 break;
2798         }
2799
2800         return ret;
2801 }
2802
2803 /**
2804  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
2805  * @phba: The Hba for which this call is being executed.
2806  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
2807  *
2808  * Adjust the data length to account for how much data
2809  * is actually on the wire.
2810  *
2811  * returns the adjusted data length
2812  **/
2813 static int
2814 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
2815                        struct lpfc_scsi_buf *lpfc_cmd)
2816 {
2817         struct scsi_cmnd *sc = lpfc_cmd->pCmd;
2818         int fcpdl;
2819
2820         fcpdl = scsi_bufflen(sc);
2821
2822         /* Check if there is protection data on the wire */
2823         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
2824                 /* Read */
2825                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
2826                         return fcpdl;
2827
2828         } else {
2829                 /* Write */
2830                 if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
2831                         return fcpdl;
2832         }
2833
2834         /*
2835          * If we are in DIF Type 1 mode every data block has a 8 byte
2836          * DIF (trailer) attached to it. Must ajust FCP data length.
2837          */
2838         if (scsi_prot_flagged(sc, SCSI_PROT_TRANSFER_PI))
2839                 fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
2840
2841         return fcpdl;
2842 }
2843
2844 /**
2845  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
2846  * @phba: The Hba for which this call is being executed.
2847  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
2848  *
2849  * This is the protection/DIF aware version of
2850  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
2851  * two functions eventually, but for now, it's here
2852  **/
2853 static int
2854 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
2855                 struct lpfc_scsi_buf *lpfc_cmd)
2856 {
2857         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
2858         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
2859         struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
2860         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
2861         uint32_t num_bde = 0;
2862         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
2863         int prot_group_type = 0;
2864         int fcpdl;
2865
2866         /*
2867          * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
2868          *  fcp_rsp regions to the first data bde entry
2869          */
2870         bpl += 2;
2871         if (scsi_sg_count(scsi_cmnd)) {
2872                 /*
2873                  * The driver stores the segment count returned from pci_map_sg
2874                  * because this a count of dma-mappings used to map the use_sg
2875                  * pages.  They are not guaranteed to be the same for those
2876                  * architectures that implement an IOMMU.
2877                  */
2878                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
2879                                         scsi_sglist(scsi_cmnd),
2880                                         scsi_sg_count(scsi_cmnd), datadir);
2881                 if (unlikely(!datasegcnt))
2882                         return 1;
2883
2884                 lpfc_cmd->seg_cnt = datasegcnt;
2885
2886                 /* First check if data segment count from SCSI Layer is good */
2887                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
2888                         goto err;
2889
2890                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
2891
2892                 switch (prot_group_type) {
2893                 case LPFC_PG_TYPE_NO_DIF:
2894
2895                         /* Here we need to add a PDE5 and PDE6 to the count */
2896                         if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt)
2897                                 goto err;
2898
2899                         num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
2900                                         datasegcnt);
2901                         /* we should have 2 or more entries in buffer list */
2902                         if (num_bde < 2)
2903                                 goto err;
2904                         break;
2905
2906                 case LPFC_PG_TYPE_DIF_BUF:
2907                         /*
2908                          * This type indicates that protection buffers are
2909                          * passed to the driver, so that needs to be prepared
2910                          * for DMA
2911                          */
2912                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
2913                                         scsi_prot_sglist(scsi_cmnd),
2914                                         scsi_prot_sg_count(scsi_cmnd), datadir);
2915                         if (unlikely(!protsegcnt)) {
2916                                 scsi_dma_unmap(scsi_cmnd);
2917                                 return 1;
2918                         }
2919
2920                         lpfc_cmd->prot_seg_cnt = protsegcnt;
2921
2922                         /*
2923                          * There is a minimun of 4 BPLs used for every
2924                          * protection data segment.
2925                          */
2926                         if ((lpfc_cmd->prot_seg_cnt * 4) >
2927                             (phba->cfg_total_seg_cnt - 2))
2928                                 goto err;
2929
2930                         num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
2931                                         datasegcnt, protsegcnt);
2932                         /* we should have 3 or more entries in buffer list */
2933                         if ((num_bde < 3) ||
2934                             (num_bde > phba->cfg_total_seg_cnt))
2935                                 goto err;
2936                         break;
2937
2938                 case LPFC_PG_TYPE_INVALID:
2939                 default:
2940                         scsi_dma_unmap(scsi_cmnd);
2941                         lpfc_cmd->seg_cnt = 0;
2942
2943                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2944                                         "9022 Unexpected protection group %i\n",
2945                                         prot_group_type);
2946                         return 1;
2947                 }
2948         }
2949
2950         /*
2951          * Finish initializing those IOCB fields that are dependent on the
2952          * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
2953          * reinitialized since all iocb memory resources are used many times
2954          * for transmit, receive, and continuation bpl's.
2955          */
2956         iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
2957         iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
2958         iocb_cmd->ulpBdeCount = 1;
2959         iocb_cmd->ulpLe = 1;
2960
2961         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
2962         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
2963
2964         /*
2965          * Due to difference in data length between DIF/non-DIF paths,
2966          * we need to set word 4 of IOCB here
2967          */
2968         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
2969
2970         return 0;
2971 err:
2972         if (lpfc_cmd->seg_cnt)
2973                 scsi_dma_unmap(scsi_cmnd);
2974         if (lpfc_cmd->prot_seg_cnt)
2975                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
2976                              scsi_prot_sg_count(scsi_cmnd),
2977                              scsi_cmnd->sc_data_direction);
2978
2979         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
2980                         "9023 Cannot setup S/G List for HBA"
2981                         "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
2982                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
2983                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
2984                         prot_group_type, num_bde);
2985
2986         lpfc_cmd->seg_cnt = 0;
2987         lpfc_cmd->prot_seg_cnt = 0;
2988         return 1;
2989 }
2990
2991 /*
2992  * This function calcuates the T10 DIF guard tag
2993  * on the specified data using a CRC algorithmn
2994  * using crc_t10dif.
2995  */
2996 uint16_t
2997 lpfc_bg_crc(uint8_t *data, int count)
2998 {
2999         uint16_t crc = 0;
3000         uint16_t x;
3001
3002         crc = crc_t10dif(data, count);
3003         x = cpu_to_be16(crc);
3004         return x;
3005 }
3006
3007 /*
3008  * This function calcuates the T10 DIF guard tag
3009  * on the specified data using a CSUM algorithmn
3010  * using ip_compute_csum.
3011  */
3012 uint16_t
3013 lpfc_bg_csum(uint8_t *data, int count)
3014 {
3015         uint16_t ret;
3016
3017         ret = ip_compute_csum(data, count);
3018         return ret;
3019 }
3020
3021 /*
3022  * This function examines the protection data to try to determine
3023  * what type of T10-DIF error occurred.
3024  */
3025 void
3026 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3027 {
3028         struct scatterlist *sgpe; /* s/g prot entry */
3029         struct scatterlist *sgde; /* s/g data entry */
3030         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3031         struct scsi_dif_tuple *src = NULL;
3032         uint8_t *data_src = NULL;
3033         uint16_t guard_tag, guard_type;
3034         uint16_t start_app_tag, app_tag;
3035         uint32_t start_ref_tag, ref_tag;
3036         int prot, protsegcnt;
3037         int err_type, len, data_len;
3038         int chk_ref, chk_app, chk_guard;
3039         uint16_t sum;
3040         unsigned blksize;
3041
3042         err_type = BGS_GUARD_ERR_MASK;
3043         sum = 0;
3044         guard_tag = 0;
3045
3046         /* First check to see if there is protection data to examine */
3047         prot = scsi_get_prot_op(cmd);
3048         if ((prot == SCSI_PROT_READ_STRIP) ||
3049             (prot == SCSI_PROT_WRITE_INSERT) ||
3050             (prot == SCSI_PROT_NORMAL))
3051                 goto out;
3052
3053         /* Currently the driver just supports ref_tag and guard_tag checking */
3054         chk_ref = 1;
3055         chk_app = 0;
3056         chk_guard = 0;
3057
3058         /* Setup a ptr to the protection data provided by the SCSI host */
3059         sgpe = scsi_prot_sglist(cmd);
3060         protsegcnt = lpfc_cmd->prot_seg_cnt;
3061
3062         if (sgpe && protsegcnt) {
3063
3064                 /*
3065                  * We will only try to verify guard tag if the segment
3066                  * data length is a multiple of the blksize.
3067                  */
3068                 sgde = scsi_sglist(cmd);
3069                 blksize = lpfc_cmd_blksize(cmd);
3070                 data_src = (uint8_t *)sg_virt(sgde);
3071                 data_len = sgde->length;
3072                 if ((data_len & (blksize - 1)) == 0)
3073                         chk_guard = 1;
3074                 guard_type = scsi_host_get_guard(cmd->device->host);
3075
3076                 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
3077                 start_app_tag = src->app_tag;
3078                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3079                 len = sgpe->length;
3080                 while (src && protsegcnt) {
3081                         while (len) {
3082
3083                                 /*
3084                                  * First check to see if a protection data
3085                                  * check is valid
3086                                  */
3087                                 if ((src->ref_tag == 0xffffffff) ||
3088                                     (src->app_tag == 0xffff)) {
3089                                         start_ref_tag++;
3090                                         goto skipit;
3091                                 }
3092
3093                                 /* App Tag checking */
3094                                 app_tag = src->app_tag;
3095                                 if (chk_app && (app_tag != start_app_tag)) {
3096                                         err_type = BGS_APPTAG_ERR_MASK;
3097                                         goto out;
3098                                 }
3099
3100                                 /* Reference Tag checking */
3101                                 ref_tag = be32_to_cpu(src->ref_tag);
3102                                 if (chk_ref && (ref_tag != start_ref_tag)) {
3103                                         err_type = BGS_REFTAG_ERR_MASK;
3104                                         goto out;
3105                                 }
3106                                 start_ref_tag++;
3107
3108                                 /* Guard Tag checking */
3109                                 if (chk_guard) {
3110                                         guard_tag = src->guard_tag;
3111                                         if (guard_type == SHOST_DIX_GUARD_IP)
3112                                                 sum = lpfc_bg_csum(data_src,
3113                                                                    blksize);
3114                                         else
3115                                                 sum = lpfc_bg_crc(data_src,
3116                                                                   blksize);
3117                                         if ((guard_tag != sum)) {
3118                                                 err_type = BGS_GUARD_ERR_MASK;
3119                                                 goto out;
3120                                         }
3121                                 }
3122 skipit:
3123                                 len -= sizeof(struct scsi_dif_tuple);
3124                                 if (len < 0)
3125                                         len = 0;
3126                                 src++;
3127
3128                                 data_src += blksize;
3129                                 data_len -= blksize;
3130
3131                                 /*
3132                                  * Are we at the end of the Data segment?
3133                                  * The data segment is only used for Guard
3134                                  * tag checking.
3135                                  */
3136                                 if (chk_guard && (data_len == 0)) {
3137                                         chk_guard = 0;
3138                                         sgde = sg_next(sgde);
3139                                         if (!sgde)
3140                                                 goto out;
3141
3142                                         data_src = (uint8_t *)sg_virt(sgde);
3143                                         data_len = sgde->length;
3144                                         if ((data_len & (blksize - 1)) == 0)
3145                                                 chk_guard = 1;
3146                                 }
3147                         }
3148
3149                         /* Goto the next Protection data segment */
3150                         sgpe = sg_next(sgpe);
3151                         if (sgpe) {
3152                                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
3153                                 len = sgpe->length;
3154                         } else {
3155                                 src = NULL;
3156                         }
3157                         protsegcnt--;
3158                 }
3159         }
3160 out:
3161         if (err_type == BGS_GUARD_ERR_MASK) {
3162                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3163                                         0x10, 0x1);
3164                 cmd->result = DRIVER_SENSE << 24
3165                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3166                 phba->bg_guard_err_cnt++;
3167                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3168                                 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
3169                                 (unsigned long)scsi_get_lba(cmd),
3170                                 sum, guard_tag);
3171
3172         } else if (err_type == BGS_REFTAG_ERR_MASK) {
3173                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3174                                         0x10, 0x3);
3175                 cmd->result = DRIVER_SENSE << 24
3176                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3177
3178                 phba->bg_reftag_err_cnt++;
3179                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3180                                 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
3181                                 (unsigned long)scsi_get_lba(cmd),
3182                                 ref_tag, start_ref_tag);
3183
3184         } else if (err_type == BGS_APPTAG_ERR_MASK) {
3185                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3186                                         0x10, 0x2);
3187                 cmd->result = DRIVER_SENSE << 24
3188                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3189
3190                 phba->bg_apptag_err_cnt++;
3191                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3192                                 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
3193                                 (unsigned long)scsi_get_lba(cmd),
3194                                 app_tag, start_app_tag);
3195         }
3196 }
3197
3198
3199 /*
3200  * This function checks for BlockGuard errors detected by
3201  * the HBA.  In case of errors, the ASC/ASCQ fields in the
3202  * sense buffer will be set accordingly, paired with
3203  * ILLEGAL_REQUEST to signal to the kernel that the HBA
3204  * detected corruption.
3205  *
3206  * Returns:
3207  *  0 - No error found
3208  *  1 - BlockGuard error found
3209  * -1 - Internal error (bad profile, ...etc)
3210  */
3211 static int
3212 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
3213                         struct lpfc_iocbq *pIocbOut)
3214 {
3215         struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
3216         struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
3217         int ret = 0;
3218         uint32_t bghm = bgf->bghm;
3219         uint32_t bgstat = bgf->bgstat;
3220         uint64_t failing_sector = 0;
3221
3222         spin_lock(&_dump_buf_lock);
3223         if (!_dump_buf_done) {
3224                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
3225                         " Data for %u blocks to debugfs\n",
3226                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3227                 lpfc_debug_save_data(phba, cmd);
3228
3229                 /* If we have a prot sgl, save the DIF buffer */
3230                 if (lpfc_prot_group_type(phba, cmd) ==
3231                                 LPFC_PG_TYPE_DIF_BUF) {
3232                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
3233                                 "Saving DIF for %u blocks to debugfs\n",
3234                                 (cmd->cmnd[7] << 8 | cmd->cmnd[8]));
3235                         lpfc_debug_save_dif(phba, cmd);
3236                 }
3237
3238                 _dump_buf_done = 1;
3239         }
3240         spin_unlock(&_dump_buf_lock);
3241
3242         if (lpfc_bgs_get_invalid_prof(bgstat)) {
3243                 cmd->result = ScsiResult(DID_ERROR, 0);
3244                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3245                                 "9072 BLKGRD: Invalid BG Profile in cmd"
3246                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3247                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3248                                 (unsigned long long)scsi_get_lba(cmd),
3249                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3250                 ret = (-1);
3251                 goto out;
3252         }
3253
3254         if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
3255                 cmd->result = ScsiResult(DID_ERROR, 0);
3256                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3257                                 "9073 BLKGRD: Invalid BG PDIF Block in cmd"
3258                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3259                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3260                                 (unsigned long long)scsi_get_lba(cmd),
3261                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3262                 ret = (-1);
3263                 goto out;
3264         }
3265
3266         if (lpfc_bgs_get_guard_err(bgstat)) {
3267                 ret = 1;
3268
3269                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3270                                 0x10, 0x1);
3271                 cmd->result = DRIVER_SENSE << 24
3272                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3273                 phba->bg_guard_err_cnt++;
3274                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3275                                 "9055 BLKGRD: Guard Tag error in cmd"
3276                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3277                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3278                                 (unsigned long long)scsi_get_lba(cmd),
3279                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3280         }
3281
3282         if (lpfc_bgs_get_reftag_err(bgstat)) {
3283                 ret = 1;
3284
3285                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3286                                 0x10, 0x3);
3287                 cmd->result = DRIVER_SENSE << 24
3288                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3289
3290                 phba->bg_reftag_err_cnt++;
3291                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3292                                 "9056 BLKGRD: Ref Tag error in cmd"
3293                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3294                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3295                                 (unsigned long long)scsi_get_lba(cmd),
3296                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3297         }
3298
3299         if (lpfc_bgs_get_apptag_err(bgstat)) {
3300                 ret = 1;
3301
3302                 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
3303                                 0x10, 0x2);
3304                 cmd->result = DRIVER_SENSE << 24
3305                         | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
3306
3307                 phba->bg_apptag_err_cnt++;
3308                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3309                                 "9061 BLKGRD: App Tag error in cmd"
3310                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3311                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3312                                 (unsigned long long)scsi_get_lba(cmd),
3313                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3314         }
3315
3316         if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
3317                 /*
3318                  * setup sense data descriptor 0 per SPC-4 as an information
3319                  * field, and put the failing LBA in it.
3320                  * This code assumes there was also a guard/app/ref tag error
3321                  * indication.
3322                  */
3323                 cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
3324                 cmd->sense_buffer[8] = 0;     /* Information descriptor type */
3325                 cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
3326                 cmd->sense_buffer[10] = 0x80; /* Validity bit */
3327
3328                 /* bghm is a "on the wire" FC frame based count */
3329                 switch (scsi_get_prot_op(cmd)) {
3330                 case SCSI_PROT_READ_INSERT:
3331                 case SCSI_PROT_WRITE_STRIP:
3332                         bghm /= cmd->device->sector_size;
3333                         break;
3334                 case SCSI_PROT_READ_STRIP:
3335                 case SCSI_PROT_WRITE_INSERT:
3336                 case SCSI_PROT_READ_PASS:
3337                 case SCSI_PROT_WRITE_PASS:
3338                         bghm /= (cmd->device->sector_size +
3339                                 sizeof(struct scsi_dif_tuple));
3340                         break;
3341                 }
3342
3343                 failing_sector = scsi_get_lba(cmd);
3344                 failing_sector += bghm;
3345
3346                 /* Descriptor Information */
3347                 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
3348         }
3349
3350         if (!ret) {
3351                 /* No error was reported - problem in FW? */
3352                 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
3353                                 "9057 BLKGRD: Unknown error in cmd"
3354                                 " 0x%x lba 0x%llx blk cnt 0x%x "
3355                                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
3356                                 (unsigned long long)scsi_get_lba(cmd),
3357                                 blk_rq_sectors(cmd->request), bgstat, bghm);
3358
3359                 /* Calcuate what type of error it was */
3360                 lpfc_calc_bg_err(phba, lpfc_cmd);
3361         }
3362 out:
3363         return ret;
3364 }
3365
3366 /**
3367  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3368  * @phba: The Hba for which this call is being executed.
3369  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3370  *
3371  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
3372  * field of @lpfc_cmd for device with SLI-4 interface spec.
3373  *
3374  * Return codes:
3375  *      1 - Error
3376  *      0 - Success
3377  **/
3378 static int
3379 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3380 {
3381         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3382         struct scatterlist *sgel = NULL;
3383         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3384         struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
3385         struct sli4_sge *first_data_sgl;
3386         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3387         dma_addr_t physaddr;
3388         uint32_t num_bde = 0;
3389         uint32_t dma_len;
3390         uint32_t dma_offset = 0;
3391         int nseg;
3392         struct ulp_bde64 *bde;
3393
3394         /*
3395          * There are three possibilities here - use scatter-gather segment, use
3396          * the single mapping, or neither.  Start the lpfc command prep by
3397          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
3398          * data bde entry.
3399          */
3400         if (scsi_sg_count(scsi_cmnd)) {
3401                 /*
3402                  * The driver stores the segment count returned from pci_map_sg
3403                  * because this a count of dma-mappings used to map the use_sg
3404                  * pages.  They are not guaranteed to be the same for those
3405                  * architectures that implement an IOMMU.
3406                  */
3407
3408                 nseg = scsi_dma_map(scsi_cmnd);
3409                 if (unlikely(!nseg))
3410                         return 1;
3411                 sgl += 1;
3412                 /* clear the last flag in the fcp_rsp map entry */
3413                 sgl->word2 = le32_to_cpu(sgl->word2);
3414                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3415                 sgl->word2 = cpu_to_le32(sgl->word2);
3416                 sgl += 1;
3417                 first_data_sgl = sgl;
3418                 lpfc_cmd->seg_cnt = nseg;
3419                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
3420                         lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
3421                                 " %s: Too many sg segments from "
3422                                 "dma_map_sg.  Config %d, seg_cnt %d\n",
3423                                 __func__, phba->cfg_sg_seg_cnt,
3424                                lpfc_cmd->seg_cnt);
3425                         lpfc_cmd->seg_cnt = 0;
3426                         scsi_dma_unmap(scsi_cmnd);
3427                         return 1;
3428                 }
3429
3430                 /*
3431                  * The driver established a maximum scatter-gather segment count
3432                  * during probe that limits the number of sg elements in any
3433                  * single scsi command.  Just run through the seg_cnt and format
3434                  * the sge's.
3435                  * When using SLI-3 the driver will try to fit all the BDEs into
3436                  * the IOCB. If it can't then the BDEs get added to a BPL as it
3437                  * does for SLI-2 mode.
3438                  */
3439                 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
3440                         physaddr = sg_dma_address(sgel);
3441                         dma_len = sg_dma_len(sgel);
3442                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
3443                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
3444                         sgl->word2 = le32_to_cpu(sgl->word2);
3445                         if ((num_bde + 1) == nseg)
3446                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3447                         else
3448                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3449                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
3450                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3451                         sgl->word2 = cpu_to_le32(sgl->word2);
3452                         sgl->sge_len = cpu_to_le32(dma_len);
3453                         dma_offset += dma_len;
3454                         sgl++;
3455                 }
3456                 /* setup the performance hint (first data BDE) if enabled */
3457                 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) {
3458                         bde = (struct ulp_bde64 *)
3459                                         &(iocb_cmd->unsli3.sli3Words[5]);
3460                         bde->addrLow = first_data_sgl->addr_lo;
3461                         bde->addrHigh = first_data_sgl->addr_hi;
3462                         bde->tus.f.bdeSize =
3463                                         le32_to_cpu(first_data_sgl->sge_len);
3464                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3465                         bde->tus.w = cpu_to_le32(bde->tus.w);
3466                 }
3467         } else {
3468                 sgl += 1;
3469                 /* clear the last flag in the fcp_rsp map entry */
3470                 sgl->word2 = le32_to_cpu(sgl->word2);
3471                 bf_set(lpfc_sli4_sge_last, sgl, 1);
3472                 sgl->word2 = cpu_to_le32(sgl->word2);
3473         }
3474
3475         /*
3476          * Finish initializing those IOCB fields that are dependent on the
3477          * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
3478          * explicitly reinitialized.
3479          * all iocb memory resources are reused.
3480          */
3481         fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
3482
3483         /*
3484          * Due to difference in data length between DIF/non-DIF paths,
3485          * we need to set word 4 of IOCB here
3486          */
3487         iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
3488         return 0;
3489 }
3490
3491 /**
3492  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
3493  * @phba: The Hba for which this call is being executed.
3494  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3495  *
3496  * This is the protection/DIF aware version of
3497  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
3498  * two functions eventually, but for now, it's here
3499  **/
3500 static int
3501 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
3502                 struct lpfc_scsi_buf *lpfc_cmd)
3503 {
3504         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
3505         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
3506         struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl);
3507         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
3508         uint32_t num_sge = 0;
3509         int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
3510         int prot_group_type = 0;
3511         int fcpdl;
3512
3513         /*
3514          * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
3515          *  fcp_rsp regions to the first data sge entry
3516          */
3517         if (scsi_sg_count(scsi_cmnd)) {
3518                 /*
3519                  * The driver stores the segment count returned from pci_map_sg
3520                  * because this a count of dma-mappings used to map the use_sg
3521                  * pages.  They are not guaranteed to be the same for those
3522                  * architectures that implement an IOMMU.
3523                  */
3524                 datasegcnt = dma_map_sg(&phba->pcidev->dev,
3525                                         scsi_sglist(scsi_cmnd),
3526                                         scsi_sg_count(scsi_cmnd), datadir);
3527                 if (unlikely(!datasegcnt))
3528                         return 1;
3529
3530                 sgl += 1;
3531                 /* clear the last flag in the fcp_rsp map entry */
3532                 sgl->word2 = le32_to_cpu(sgl->word2);
3533                 bf_set(lpfc_sli4_sge_last, sgl, 0);
3534                 sgl->word2 = cpu_to_le32(sgl->word2);
3535
3536                 sgl += 1;
3537                 lpfc_cmd->seg_cnt = datasegcnt;
3538
3539                 /* First check if data segment count from SCSI Layer is good */
3540                 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt)
3541                         goto err;
3542
3543                 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
3544
3545                 switch (prot_group_type) {
3546                 case LPFC_PG_TYPE_NO_DIF:
3547                         /* Here we need to add a DISEED to the count */
3548                         if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt)
3549                                 goto err;
3550
3551                         num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
3552                                         datasegcnt);
3553
3554                         /* we should have 2 or more entries in buffer list */
3555                         if (num_sge < 2)
3556                                 goto err;
3557                         break;
3558
3559                 case LPFC_PG_TYPE_DIF_BUF:
3560                         /*
3561                          * This type indicates that protection buffers are
3562                          * passed to the driver, so that needs to be prepared
3563                          * for DMA
3564                          */
3565                         protsegcnt = dma_map_sg(&phba->pcidev->dev,
3566                                         scsi_prot_sglist(scsi_cmnd),
3567                                         scsi_prot_sg_count(scsi_cmnd), datadir);
3568                         if (unlikely(!protsegcnt)) {
3569                                 scsi_dma_unmap(scsi_cmnd);
3570                                 return 1;
3571                         }
3572
3573                         lpfc_cmd->prot_seg_cnt = protsegcnt;
3574                         /*
3575                          * There is a minimun of 3 SGEs used for every
3576                          * protection data segment.
3577                          */
3578                         if ((lpfc_cmd->prot_seg_cnt * 3) >
3579                             (phba->cfg_total_seg_cnt - 2))
3580                                 goto err;
3581
3582                         num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
3583                                         datasegcnt, protsegcnt);
3584
3585                         /* we should have 3 or more entries in buffer list */
3586                         if ((num_sge < 3) ||
3587                             (num_sge > phba->cfg_total_seg_cnt))
3588                                 goto err;
3589                         break;
3590
3591                 case LPFC_PG_TYPE_INVALID:
3592                 default:
3593                         scsi_dma_unmap(scsi_cmnd);
3594                         lpfc_cmd->seg_cnt = 0;
3595
3596                         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3597                                         "9083 Unexpected protection group %i\n",
3598                                         prot_group_type);
3599                         return 1;
3600                 }
3601         }
3602
3603         switch (scsi_get_prot_op(scsi_cmnd)) {
3604         case SCSI_PROT_WRITE_STRIP:
3605         case SCSI_PROT_READ_STRIP:
3606                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP;
3607                 break;
3608         case SCSI_PROT_WRITE_INSERT:
3609         case SCSI_PROT_READ_INSERT:
3610                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT;
3611                 break;
3612         case SCSI_PROT_WRITE_PASS:
3613         case SCSI_PROT_READ_PASS:
3614                 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS;
3615                 break;
3616         }
3617
3618         fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
3619         fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
3620
3621         /*
3622          * Due to difference in data length between DIF/non-DIF paths,
3623          * we need to set word 4 of IOCB here
3624          */
3625         iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
3626
3627         return 0;
3628 err:
3629         if (lpfc_cmd->seg_cnt)
3630                 scsi_dma_unmap(scsi_cmnd);
3631         if (lpfc_cmd->prot_seg_cnt)
3632                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
3633                              scsi_prot_sg_count(scsi_cmnd),
3634                              scsi_cmnd->sc_data_direction);
3635
3636         lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
3637                         "9084 Cannot setup S/G List for HBA"
3638                         "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
3639                         lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
3640                         phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
3641                         prot_group_type, num_sge);
3642
3643         lpfc_cmd->seg_cnt = 0;
3644         lpfc_cmd->prot_seg_cnt = 0;
3645         return 1;
3646 }
3647
3648 /**
3649  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3650  * @phba: The Hba for which this call is being executed.
3651  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3652  *
3653  * This routine wraps the actual DMA mapping function pointer from the
3654  * lpfc_hba struct.
3655  *
3656  * Return codes:
3657  *      1 - Error
3658  *      0 - Success
3659  **/
3660 static inline int
3661 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3662 {
3663         return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
3664 }
3665
3666 /**
3667  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
3668  * using BlockGuard.
3669  * @phba: The Hba for which this call is being executed.
3670  * @lpfc_cmd: The scsi buffer which is going to be mapped.
3671  *
3672  * This routine wraps the actual DMA mapping function pointer from the
3673  * lpfc_hba struct.
3674  *
3675  * Return codes:
3676  *      1 - Error
3677  *      0 - Success
3678  **/
3679 static inline int
3680 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
3681 {
3682         return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
3683 }
3684
3685 /**
3686  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
3687  * @phba: Pointer to hba context object.
3688  * @vport: Pointer to vport object.
3689  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
3690  * @rsp_iocb: Pointer to response iocb object which reported error.
3691  *
3692  * This function posts an event when there is a SCSI command reporting
3693  * error from the scsi device.
3694  **/
3695 static void
3696 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
3697                 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
3698         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3699         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3700         uint32_t resp_info = fcprsp->rspStatus2;
3701         uint32_t scsi_status = fcprsp->rspStatus3;
3702         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3703         struct lpfc_fast_path_event *fast_path_evt = NULL;
3704         struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
3705         unsigned long flags;
3706
3707         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3708                 return;
3709
3710         /* If there is queuefull or busy condition send a scsi event */
3711         if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
3712                 (cmnd->result == SAM_STAT_BUSY)) {
3713                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3714                 if (!fast_path_evt)
3715                         return;
3716                 fast_path_evt->un.scsi_evt.event_type =
3717                         FC_REG_SCSI_EVENT;
3718                 fast_path_evt->un.scsi_evt.subcategory =
3719                 (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
3720                 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
3721                 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
3722                 memcpy(&fast_path_evt->un.scsi_evt.wwpn,
3723                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3724                 memcpy(&fast_path_evt->un.scsi_evt.wwnn,
3725                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3726         } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
3727                 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
3728                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3729                 if (!fast_path_evt)
3730                         return;
3731                 fast_path_evt->un.check_cond_evt.scsi_event.event_type =
3732                         FC_REG_SCSI_EVENT;
3733                 fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
3734                         LPFC_EVENT_CHECK_COND;
3735                 fast_path_evt->un.check_cond_evt.scsi_event.lun =
3736                         cmnd->device->lun;
3737                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
3738                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3739                 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
3740                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3741                 fast_path_evt->un.check_cond_evt.sense_key =
3742                         cmnd->sense_buffer[2] & 0xf;
3743                 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
3744                 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
3745         } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3746                      fcpi_parm &&
3747                      ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
3748                         ((scsi_status == SAM_STAT_GOOD) &&
3749                         !(resp_info & (RESID_UNDER | RESID_OVER))))) {
3750                 /*
3751                  * If status is good or resid does not match with fcp_param and
3752                  * there is valid fcpi_parm, then there is a read_check error
3753                  */
3754                 fast_path_evt = lpfc_alloc_fast_evt(phba);
3755                 if (!fast_path_evt)
3756                         return;
3757                 fast_path_evt->un.read_check_error.header.event_type =
3758                         FC_REG_FABRIC_EVENT;
3759                 fast_path_evt->un.read_check_error.header.subcategory =
3760                         LPFC_EVENT_FCPRDCHKERR;
3761                 memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
3762                         &pnode->nlp_portname, sizeof(struct lpfc_name));
3763                 memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
3764                         &pnode->nlp_nodename, sizeof(struct lpfc_name));
3765                 fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
3766                 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
3767                 fast_path_evt->un.read_check_error.fcpiparam =
3768                         fcpi_parm;
3769         } else
3770                 return;
3771
3772         fast_path_evt->vport = vport;
3773         spin_lock_irqsave(&phba->hbalock, flags);
3774         list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
3775         spin_unlock_irqrestore(&phba->hbalock, flags);
3776         lpfc_worker_wake_up(phba);
3777         return;
3778 }
3779
3780 /**
3781  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
3782  * @phba: The HBA for which this call is being executed.
3783  * @psb: The scsi buffer which is going to be un-mapped.
3784  *
3785  * This routine does DMA un-mapping of scatter gather list of scsi command
3786  * field of @lpfc_cmd for device with SLI-3 interface spec.
3787  **/
3788 static void
3789 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
3790 {
3791         /*
3792          * There are only two special cases to consider.  (1) the scsi command
3793          * requested scatter-gather usage or (2) the scsi command allocated
3794          * a request buffer, but did not request use_sg.  There is a third
3795          * case, but it does not require resource deallocation.
3796          */
3797         if (psb->seg_cnt > 0)
3798                 scsi_dma_unmap(psb->pCmd);
3799         if (psb->prot_seg_cnt > 0)
3800                 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
3801                                 scsi_prot_sg_count(psb->pCmd),
3802                                 psb->pCmd->sc_data_direction);
3803 }
3804
3805 /**
3806  * lpfc_handler_fcp_err - FCP response handler
3807  * @vport: The virtual port for which this call is being executed.
3808  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
3809  * @rsp_iocb: The response IOCB which contains FCP error.
3810  *
3811  * This routine is called to process response IOCB with status field
3812  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
3813  * based upon SCSI and FCP error.
3814  **/
3815 static void
3816 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
3817                     struct lpfc_iocbq *rsp_iocb)
3818 {
3819         struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
3820         struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
3821         struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
3822         uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
3823         uint32_t resp_info = fcprsp->rspStatus2;
3824         uint32_t scsi_status = fcprsp->rspStatus3;
3825         uint32_t *lp;
3826         uint32_t host_status = DID_OK;
3827         uint32_t rsplen = 0;
3828         uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
3829
3830
3831         /*
3832          *  If this is a task management command, there is no
3833          *  scsi packet associated with this lpfc_cmd.  The driver
3834          *  consumes it.
3835          */
3836         if (fcpcmd->fcpCntl2) {
3837                 scsi_status = 0;
3838                 goto out;
3839         }
3840
3841         if (resp_info & RSP_LEN_VALID) {
3842                 rsplen = be32_to_cpu(fcprsp->rspRspLen);
3843                 if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
3844                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3845                                  "2719 Invalid response length: "
3846                                  "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
3847                                  cmnd->device->id,
3848                                  cmnd->device->lun, cmnd->cmnd[0],
3849                                  rsplen);
3850                         host_status = DID_ERROR;
3851                         goto out;
3852                 }
3853                 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
3854                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3855                                  "2757 Protocol failure detected during "
3856                                  "processing of FCP I/O op: "
3857                                  "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
3858                                  cmnd->device->id,
3859                                  cmnd->device->lun, cmnd->cmnd[0],
3860                                  fcprsp->rspInfo3);
3861                         host_status = DID_ERROR;
3862                         goto out;
3863                 }
3864         }
3865
3866         if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
3867                 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
3868                 if (snslen > SCSI_SENSE_BUFFERSIZE)
3869                         snslen = SCSI_SENSE_BUFFERSIZE;
3870
3871                 if (resp_info & RSP_LEN_VALID)
3872                   rsplen = be32_to_cpu(fcprsp->rspRspLen);
3873                 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
3874         }
3875         lp = (uint32_t *)cmnd->sense_buffer;
3876
3877         /* special handling for under run conditions */
3878         if (!scsi_status && (resp_info & RESID_UNDER)) {
3879                 /* don't log under runs if fcp set... */
3880                 if (vport->cfg_log_verbose & LOG_FCP)
3881                         logit = LOG_FCP_ERROR;
3882                 /* unless operator says so */
3883                 if (vport->cfg_log_verbose & LOG_FCP_UNDER)
3884                         logit = LOG_FCP_UNDER;
3885         }
3886
3887         lpfc_printf_vlog(vport, KERN_WARNING, logit,
3888                          "9024 FCP command x%x failed: x%x SNS x%x x%x "
3889                          "Data: x%x x%x x%x x%x x%x\n",
3890                          cmnd->cmnd[0], scsi_status,
3891                          be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
3892                          be32_to_cpu(fcprsp->rspResId),
3893                          be32_to_cpu(fcprsp->rspSnsLen),
3894                          be32_to_cpu(fcprsp->rspRspLen),
3895                          fcprsp->rspInfo3);
3896
3897         scsi_set_resid(cmnd, 0);
3898         if (resp_info & RESID_UNDER) {
3899                 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
3900
3901                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
3902                                  "9025 FCP Read Underrun, expected %d, "
3903                                  "residual %d Data: x%x x%x x%x\n",
3904                                  be32_to_cpu(fcpcmd->fcpDl),
3905                                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
3906                                  cmnd->underflow);
3907
3908                 /*
3909                  * If there is an under run check if under run reported by
3910                  * storage array is same as the under run reported by HBA.
3911                  * If this is not same, there is a dropped frame.
3912                  */
3913                 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
3914                         fcpi_parm &&
3915                         (scsi_get_resid(cmnd) != fcpi_parm)) {
3916                         lpfc_printf_vlog(vport, KERN_WARNING,
3917                                          LOG_FCP | LOG_FCP_ERROR,
3918                                          "9026 FCP Read Check Error "
3919                                          "and Underrun Data: x%x x%x x%x x%x\n",
3920                                          be32_to_cpu(fcpcmd->fcpDl),
3921                                          scsi_get_resid(cmnd), fcpi_parm,
3922                                          cmnd->cmnd[0]);
3923                         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3924                         host_status = DID_ERROR;
3925                 }
3926                 /*
3927                  * The cmnd->underflow is the minimum number of bytes that must
3928                  * be transferred for this command.  Provided a sense condition
3929                  * is not present, make sure the actual amount transferred is at
3930                  * least the underflow value or fail.
3931                  */
3932                 if (!(resp_info & SNS_LEN_VALID) &&
3933                     (scsi_status == SAM_STAT_GOOD) &&
3934                     (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
3935                      < cmnd->underflow)) {
3936                         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3937                                          "9027 FCP command x%x residual "
3938                                          "underrun converted to error "
3939                                          "Data: x%x x%x x%x\n",
3940                                          cmnd->cmnd[0], scsi_bufflen(cmnd),
3941                                          scsi_get_resid(cmnd), cmnd->underflow);
3942                         host_status = DID_ERROR;
3943                 }
3944         } else if (resp_info & RESID_OVER) {
3945                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
3946                                  "9028 FCP command x%x residual overrun error. "
3947                                  "Data: x%x x%x\n", cmnd->cmnd[0],
3948                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
3949                 host_status = DID_ERROR;
3950
3951         /*
3952          * Check SLI validation that all the transfer was actually done
3953          * (fcpi_parm should be zero).
3954          */
3955         } else if (fcpi_parm) {
3956                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
3957                                  "9029 FCP Data Transfer Check Error: "
3958                                  "x%x x%x x%x x%x x%x\n",
3959                                  be32_to_cpu(fcpcmd->fcpDl),
3960                                  be32_to_cpu(fcprsp->rspResId),
3961                                  fcpi_parm, cmnd->cmnd[0], scsi_status);
3962                 switch (scsi_status) {
3963                 case SAM_STAT_GOOD:
3964                 case SAM_STAT_CHECK_CONDITION:
3965                         /* Fabric dropped a data frame. Fail any successful
3966                          * command in which we detected dropped frames.
3967                          * A status of good or some check conditions could
3968                          * be considered a successful command.
3969                          */
3970                         host_status = DID_ERROR;
3971                         break;
3972                 }
3973                 scsi_set_resid(cmnd, scsi_bufflen(cmnd));
3974         }
3975
3976  out:
3977         cmnd->result = ScsiResult(host_status, scsi_status);
3978         lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
3979 }
3980
3981 /**
3982  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
3983  * @phba: The Hba for which this call is being executed.
3984  * @pIocbIn: The command IOCBQ for the scsi cmnd.
3985  * @pIocbOut: The response IOCBQ for the scsi cmnd.
3986  *
3987  * This routine assigns scsi command result by looking into response IOCB
3988  * status field appropriately. This routine handles QUEUE FULL condition as
3989  * well by ramping down device queue depth.
3990  **/
3991 static void
3992 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
3993                         struct lpfc_iocbq *pIocbOut)
3994 {
3995         struct lpfc_scsi_buf *lpfc_cmd =
3996                 (struct lpfc_scsi_buf *) pIocbIn->context1;
3997         struct lpfc_vport      *vport = pIocbIn->vport;
3998         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
3999         struct lpfc_nodelist *pnode = rdata->pnode;
4000         struct scsi_cmnd *cmd;
4001         int result;
4002         struct scsi_device *tmp_sdev;
4003         int depth;
4004         unsigned long flags;
4005         struct lpfc_fast_path_event *fast_path_evt;
4006         struct Scsi_Host *shost;
4007         uint32_t queue_depth, scsi_id;
4008         uint32_t logit = LOG_FCP;
4009
4010         /* Sanity check on return of outstanding command */
4011         if (!(lpfc_cmd->pCmd))
4012                 return;
4013         cmd = lpfc_cmd->pCmd;
4014         shost = cmd->device->host;
4015
4016         lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
4017         lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
4018         /* pick up SLI4 exhange busy status from HBA */
4019         lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;
4020
4021 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
4022         if (lpfc_cmd->prot_data_type) {
4023                 struct scsi_dif_tuple *src = NULL;
4024
4025                 src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
4026                 /*
4027                  * Used to restore any changes to protection
4028                  * data for error injection.
4029                  */
4030                 switch (lpfc_cmd->prot_data_type) {
4031                 case LPFC_INJERR_REFTAG:
4032                         src->ref_tag =
4033                                 lpfc_cmd->prot_data;
4034                         break;
4035                 case LPFC_INJERR_APPTAG:
4036                         src->app_tag =
4037                                 (uint16_t)lpfc_cmd->prot_data;
4038                         break;
4039                 case LPFC_INJERR_GUARD:
4040                         src->guard_tag =
4041                                 (uint16_t)lpfc_cmd->prot_data;
4042                         break;
4043                 default:
4044                         break;
4045                 }
4046
4047                 lpfc_cmd->prot_data = 0;
4048                 lpfc_cmd->prot_data_type = 0;
4049                 lpfc_cmd->prot_data_segment = NULL;
4050         }
4051 #endif
4052         if (pnode && NLP_CHK_NODE_ACT(pnode))
4053                 atomic_dec(&pnode->cmd_pending);
4054
4055         if (lpfc_cmd->status) {
4056                 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
4057                     (lpfc_cmd->result & IOERR_DRVR_MASK))
4058                         lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
4059                 else if (lpfc_cmd->status >= IOSTAT_CNT)
4060                         lpfc_cmd->status = IOSTAT_DEFAULT;
4061                 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
4062                     !lpfc_cmd->fcp_rsp->rspStatus3 &&
4063                     (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
4064                     !(vport->cfg_log_verbose & LOG_FCP_UNDER))
4065                         logit = 0;
4066                 else
4067                         logit = LOG_FCP | LOG_FCP_UNDER;
4068                 lpfc_printf_vlog(vport, KERN_WARNING, logit,
4069                          "9030 FCP cmd x%x failed <%d/%d> "
4070                          "status: x%x result: x%x "
4071                          "sid: x%x did: x%x oxid: x%x "
4072                          "Data: x%x x%x\n",
4073                          cmd->cmnd[0],
4074                          cmd->device ? cmd->device->id : 0xffff,
4075                          cmd->device ? cmd->device->lun : 0xffff,
4076                          lpfc_cmd->status, lpfc_cmd->result,
4077                          vport->fc_myDID, pnode->nlp_DID,
4078                          phba->sli_rev == LPFC_SLI_REV4 ?
4079                              lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
4080                          pIocbOut->iocb.ulpContext,
4081                          lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
4082
4083                 switch (lpfc_cmd->status) {
4084                 case IOSTAT_FCP_RSP_ERROR:
4085                         /* Call FCP RSP handler to determine result */
4086                         lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
4087                         break;
4088                 case IOSTAT_NPORT_BSY:
4089                 case IOSTAT_FABRIC_BSY:
4090                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
4091                         fast_path_evt = lpfc_alloc_fast_evt(phba);
4092                         if (!fast_path_evt)
4093                                 break;
4094                         fast_path_evt->un.fabric_evt.event_type =
4095                                 FC_REG_FABRIC_EVENT;
4096                         fast_path_evt->un.fabric_evt.subcategory =
4097                                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
4098                                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
4099                         if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4100                                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
4101                                         &pnode->nlp_portname,
4102                                         sizeof(struct lpfc_name));
4103                                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
4104                                         &pnode->nlp_nodename,
4105                                         sizeof(struct lpfc_name));
4106                         }
4107                         fast_path_evt->vport = vport;
4108                         fast_path_evt->work_evt.evt =
4109                                 LPFC_EVT_FASTPATH_MGMT_EVT;
4110                         spin_lock_irqsave(&phba->hbalock, flags);
4111                         list_add_tail(&fast_path_evt->work_evt.evt_listp,
4112                                 &phba->work_list);
4113                         spin_unlock_irqrestore(&phba->hbalock, flags);
4114                         lpfc_worker_wake_up(phba);
4115                         break;
4116                 case IOSTAT_LOCAL_REJECT:
4117                 case IOSTAT_REMOTE_STOP:
4118                         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
4119                             lpfc_cmd->result ==
4120                                         IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
4121                             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
4122                             lpfc_cmd->result ==
4123                                         IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
4124                                 cmd->result = ScsiResult(DID_NO_CONNECT, 0);
4125                                 break;
4126                         }
4127                         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
4128                             lpfc_cmd->result == IOERR_NO_RESOURCES ||
4129                             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
4130                             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
4131                                 cmd->result = ScsiResult(DID_REQUEUE, 0);
4132                                 break;
4133                         }
4134                         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
4135                              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
4136                              pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
4137                                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
4138                                         /*
4139                                          * This is a response for a BG enabled
4140                                          * cmd. Parse BG error
4141                                          */
4142                                         lpfc_parse_bg_err(phba, lpfc_cmd,
4143                                                         pIocbOut);
4144                                         break;
4145                                 } else {
4146                                         lpfc_printf_vlog(vport, KERN_WARNING,
4147                                                         LOG_BG,
4148                                                         "9031 non-zero BGSTAT "
4149                                                         "on unprotected cmd\n");
4150                                 }
4151                         }
4152                         if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
4153                                 && (phba->sli_rev == LPFC_SLI_REV4)
4154                                 && (pnode && NLP_CHK_NODE_ACT(pnode))) {
4155                                 /* This IO was aborted by the target, we don't
4156                                  * know the rxid and because we did not send the
4157                                  * ABTS we cannot generate and RRQ.
4158                                  */
4159                                 lpfc_set_rrq_active(phba, pnode,
4160                                         lpfc_cmd->cur_iocbq.sli4_lxritag,
4161                                         0, 0);
4162                         }
4163                 /* else: fall through */
4164                 default:
4165                         cmd->result = ScsiResult(DID_ERROR, 0);
4166                         break;
4167                 }
4168
4169                 if (!pnode || !NLP_CHK_NODE_ACT(pnode)
4170                     || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
4171                         cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
4172                                                  SAM_STAT_BUSY);
4173         } else
4174                 cmd->result = ScsiResult(DID_OK, 0);
4175
4176         if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
4177                 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
4178
4179                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4180                                  "0710 Iodone <%d/%d> cmd %p, error "
4181                                  "x%x SNS x%x x%x Data: x%x x%x\n",
4182                                  cmd->device->id, cmd->device->lun, cmd,
4183                                  cmd->result, *lp, *(lp + 3), cmd->retries,
4184                                  scsi_get_resid(cmd));
4185         }
4186
4187         lpfc_update_stats(phba, lpfc_cmd);
4188         result = cmd->result;
4189         if (vport->cfg_max_scsicmpl_time &&
4190            time_after(jiffies, lpfc_cmd->start_time +
4191                 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
4192                 spin_lock_irqsave(shost->host_lock, flags);
4193                 if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4194                         if (pnode->cmd_qdepth >
4195                                 atomic_read(&pnode->cmd_pending) &&
4196                                 (atomic_read(&pnode->cmd_pending) >
4197                                 LPFC_MIN_TGT_QDEPTH) &&
4198                                 ((cmd->cmnd[0] == READ_10) ||
4199                                 (cmd->cmnd[0] == WRITE_10)))
4200                                 pnode->cmd_qdepth =
4201                                         atomic_read(&pnode->cmd_pending);
4202
4203                         pnode->last_change_time = jiffies;
4204                 }
4205                 spin_unlock_irqrestore(shost->host_lock, flags);
4206         } else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
4207                 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
4208                    time_after(jiffies, pnode->last_change_time +
4209                               msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
4210                         spin_lock_irqsave(shost->host_lock, flags);
4211                         depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
4212                                 / 100;
4213                         depth = depth ? depth : 1;
4214                         pnode->cmd_qdepth += depth;
4215                         if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
4216                                 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
4217                         pnode->last_change_time = jiffies;
4218                         spin_unlock_irqrestore(shost->host_lock, flags);
4219                 }
4220         }
4221
4222         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4223
4224         /* The sdev is not guaranteed to be valid post scsi_done upcall. */
4225         queue_depth = cmd->device->queue_depth;
4226         scsi_id = cmd->device->id;
4227         cmd->scsi_done(cmd);
4228
4229         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4230                 spin_lock_irqsave(&phba->hbalock, flags);
4231                 lpfc_cmd->pCmd = NULL;
4232                 spin_unlock_irqrestore(&phba->hbalock, flags);
4233
4234                 /*
4235                  * If there is a thread waiting for command completion
4236                  * wake up the thread.
4237                  */
4238                 spin_lock_irqsave(shost->host_lock, flags);
4239                 if (lpfc_cmd->waitq)
4240                         wake_up(lpfc_cmd->waitq);
4241                 spin_unlock_irqrestore(shost->host_lock, flags);
4242                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4243                 return;
4244         }
4245
4246         if (!result)
4247                 lpfc_rampup_queue_depth(vport, queue_depth);
4248
4249         /*
4250          * Check for queue full.  If the lun is reporting queue full, then
4251          * back off the lun queue depth to prevent target overloads.
4252          */
4253         if (result == SAM_STAT_TASK_SET_FULL && pnode &&
4254             NLP_CHK_NODE_ACT(pnode)) {
4255                 shost_for_each_device(tmp_sdev, shost) {
4256                         if (tmp_sdev->id != scsi_id)
4257                                 continue;
4258                         depth = scsi_track_queue_full(tmp_sdev,
4259                                                       tmp_sdev->queue_depth-1);
4260                         if (depth <= 0)
4261                                 continue;
4262                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4263                                          "0711 detected queue full - lun queue "
4264                                          "depth adjusted to %d.\n", depth);
4265                         lpfc_send_sdev_queuedepth_change_event(phba, vport,
4266                                                                pnode,
4267                                                                tmp_sdev->lun,
4268                                                                depth+1, depth);
4269                 }
4270         }
4271
4272         spin_lock_irqsave(&phba->hbalock, flags);
4273         lpfc_cmd->pCmd = NULL;
4274         spin_unlock_irqrestore(&phba->hbalock, flags);
4275
4276         /*
4277          * If there is a thread waiting for command completion
4278          * wake up the thread.
4279          */
4280         spin_lock_irqsave(shost->host_lock, flags);
4281         if (lpfc_cmd->waitq)
4282                 wake_up(lpfc_cmd->waitq);
4283         spin_unlock_irqrestore(shost->host_lock, flags);
4284
4285         lpfc_release_scsi_buf(phba, lpfc_cmd);
4286 }
4287
4288 /**
4289  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
4290  * @data: A pointer to the immediate command data portion of the IOCB.
4291  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
4292  *
4293  * The routine copies the entire FCP command from @fcp_cmnd to @data while
4294  * byte swapping the data to big endian format for transmission on the wire.
4295  **/
4296 static void
4297 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
4298 {
4299         int i, j;
4300         for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
4301              i += sizeof(uint32_t), j++) {
4302                 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
4303         }
4304 }
4305
4306 /**
4307  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
4308  * @vport: The virtual port for which this call is being executed.
4309  * @lpfc_cmd: The scsi command which needs to send.
4310  * @pnode: Pointer to lpfc_nodelist.
4311  *
4312  * This routine initializes fcp_cmnd and iocb data structure from scsi command
4313  * to transfer for device with SLI3 interface spec.
4314  **/
4315 static void
4316 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
4317                     struct lpfc_nodelist *pnode)
4318 {
4319         struct lpfc_hba *phba = vport->phba;
4320         struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
4321         struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
4322         IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
4323         struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
4324         int datadir = scsi_cmnd->sc_data_direction;
4325         char tag[2];
4326         uint8_t *ptr;
4327         bool sli4;
4328
4329         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4330                 return;
4331
4332         lpfc_cmd->fcp_rsp->rspSnsLen = 0;
4333         /* clear task management bits */
4334         lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
4335
4336         int_to_scsilun(lpfc_cmd->pCmd->device->lun,
4337                         &lpfc_cmd->fcp_cmnd->fcp_lun);
4338
4339         ptr = &fcp_cmnd->fcpCdb[0];
4340         memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
4341         if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
4342                 ptr += scsi_cmnd->cmd_len;
4343                 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
4344         }
4345
4346         if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
4347                 switch (tag[0]) {
4348                 case HEAD_OF_QUEUE_TAG:
4349                         fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
4350                         break;
4351                 case ORDERED_QUEUE_TAG:
4352                         fcp_cmnd->fcpCntl1 = ORDERED_Q;
4353                         break;
4354                 default:
4355                         fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4356                         break;
4357                 }
4358         } else
4359                 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
4360
4361         sli4 = (phba->sli_rev == LPFC_SLI_REV4);
4362
4363         /*
4364          * There are three possibilities here - use scatter-gather segment, use
4365          * the single mapping, or neither.  Start the lpfc command prep by
4366          * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
4367          * data bde entry.
4368          */
4369         if (scsi_sg_count(scsi_cmnd)) {
4370                 if (datadir == DMA_TO_DEVICE) {
4371                         iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
4372                         if (sli4)
4373                                 iocb_cmd->ulpPU = PARM_READ_CHECK;
4374                         else {
4375                                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4376                                 iocb_cmd->ulpPU = 0;
4377                         }
4378                         fcp_cmnd->fcpCntl3 = WRITE_DATA;
4379                         phba->fc4OutputRequests++;
4380                 } else {
4381                         iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
4382                         iocb_cmd->ulpPU = PARM_READ_CHECK;
4383                         fcp_cmnd->fcpCntl3 = READ_DATA;
4384                         phba->fc4InputRequests++;
4385                 }
4386         } else {
4387                 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
4388                 iocb_cmd->un.fcpi.fcpi_parm = 0;
4389                 iocb_cmd->ulpPU = 0;
4390                 fcp_cmnd->fcpCntl3 = 0;
4391                 phba->fc4ControlRequests++;
4392         }
4393         if (phba->sli_rev == 3 &&
4394             !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4395                 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
4396         /*
4397          * Finish initializing those IOCB fields that are independent
4398          * of the scsi_cmnd request_buffer
4399          */
4400         piocbq->iocb.ulpContext = pnode->nlp_rpi;
4401         if (sli4)
4402                 piocbq->iocb.ulpContext =
4403                   phba->sli4_hba.rpi_ids[pnode->nlp_rpi];
4404         if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
4405                 piocbq->iocb.ulpFCP2Rcvy = 1;
4406         else
4407                 piocbq->iocb.ulpFCP2Rcvy = 0;
4408
4409         piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
4410         piocbq->context1  = lpfc_cmd;
4411         piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4412         piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
4413         piocbq->vport = vport;
4414 }
4415
4416 /**
4417  * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit
4418  * @vport: The virtual port for which this call is being executed.
4419  * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
4420  * @lun: Logical unit number.
4421  * @task_mgmt_cmd: SCSI task management command.
4422  *
4423  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
4424  * for device with SLI-3 interface spec.
4425  *
4426  * Return codes:
4427  *   0 - Error
4428  *   1 - Success
4429  **/
4430 static int
4431 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
4432                              struct lpfc_scsi_buf *lpfc_cmd,
4433                              unsigned int lun,
4434                              uint8_t task_mgmt_cmd)
4435 {
4436         struct lpfc_iocbq *piocbq;
4437         IOCB_t *piocb;
4438         struct fcp_cmnd *fcp_cmnd;
4439         struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
4440         struct lpfc_nodelist *ndlp = rdata->pnode;
4441
4442         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
4443             ndlp->nlp_state != NLP_STE_MAPPED_NODE)
4444                 return 0;
4445
4446         piocbq = &(lpfc_cmd->cur_iocbq);
4447         piocbq->vport = vport;
4448
4449         piocb = &piocbq->iocb;
4450
4451         fcp_cmnd = lpfc_cmd->fcp_cmnd;
4452         /* Clear out any old data in the FCP command area */
4453         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
4454         int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
4455         fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
4456         if (vport->phba->sli_rev == 3 &&
4457             !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
4458                 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
4459         piocb->ulpCommand = CMD_FCP_ICMND64_CR;
4460         piocb->ulpContext = ndlp->nlp_rpi;
4461         if (vport->phba->sli_rev == LPFC_SLI_REV4) {
4462                 piocb->ulpContext =
4463                   vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
4464         }
4465         if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
4466                 piocb->ulpFCP2Rcvy = 1;
4467         }
4468         piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
4469
4470         /* ulpTimeout is only one byte */
4471         if (lpfc_cmd->timeout > 0xff) {
4472                 /*
4473                  * Do not timeout the command at the firmware level.
4474                  * The driver will provide the timeout mechanism.
4475                  */
4476                 piocb->ulpTimeout = 0;
4477         } else
4478                 piocb->ulpTimeout = lpfc_cmd->timeout;
4479
4480         if (vport->phba->sli_rev == LPFC_SLI_REV4)
4481                 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
4482
4483         return 1;
4484 }
4485
4486 /**
4487  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
4488  * @phba: The hba struct for which this call is being executed.
4489  * @dev_grp: The HBA PCI-Device group number.
4490  *
4491  * This routine sets up the SCSI interface API function jump table in @phba
4492  * struct.
4493  * Returns: 0 - success, -ENODEV - failure.
4494  **/
4495 int
4496 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
4497 {
4498
4499         phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
4500         phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
4501
4502         switch (dev_grp) {
4503         case LPFC_PCI_DEV_LP:
4504                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
4505                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
4506                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
4507                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
4508                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
4509                 break;
4510         case LPFC_PCI_DEV_OC:
4511                 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
4512                 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
4513                 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
4514                 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
4515                 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
4516                 break;
4517         default:
4518                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
4519                                 "1418 Invalid HBA PCI-device group: 0x%x\n",
4520                                 dev_grp);
4521                 return -ENODEV;
4522                 break;
4523         }
4524         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
4525         phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
4526         return 0;
4527 }
4528
4529 /**
4530  * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
4531  * @phba: The Hba for which this call is being executed.
4532  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
4533  * @rspiocbq: Pointer to lpfc_iocbq data structure.
4534  *
4535  * This routine is IOCB completion routine for device reset and target reset
4536  * routine. This routine release scsi buffer associated with lpfc_cmd.
4537  **/
4538 static void
4539 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
4540                         struct lpfc_iocbq *cmdiocbq,
4541                         struct lpfc_iocbq *rspiocbq)
4542 {
4543         struct lpfc_scsi_buf *lpfc_cmd =
4544                 (struct lpfc_scsi_buf *) cmdiocbq->context1;
4545         if (lpfc_cmd)
4546                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4547         return;
4548 }
4549
4550 /**
4551  * lpfc_info - Info entry point of scsi_host_template data structure
4552  * @host: The scsi host for which this call is being executed.
4553  *
4554  * This routine provides module information about hba.
4555  *
4556  * Reutrn code:
4557  *   Pointer to char - Success.
4558  **/
4559 const char *
4560 lpfc_info(struct Scsi_Host *host)
4561 {
4562         struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
4563         struct lpfc_hba   *phba = vport->phba;
4564         int len, link_speed = 0;
4565         static char  lpfcinfobuf[384];
4566
4567         memset(lpfcinfobuf,0,384);
4568         if (phba && phba->pcidev){
4569                 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
4570                 len = strlen(lpfcinfobuf);
4571                 snprintf(lpfcinfobuf + len,
4572                         384-len,
4573                         " on PCI bus %02x device %02x irq %d",
4574                         phba->pcidev->bus->number,
4575                         phba->pcidev->devfn,
4576                         phba->pcidev->irq);
4577                 len = strlen(lpfcinfobuf);
4578                 if (phba->Port[0]) {
4579                         snprintf(lpfcinfobuf + len,
4580                                  384-len,
4581                                  " port %s",
4582                                  phba->Port);
4583                 }
4584                 len = strlen(lpfcinfobuf);
4585                 if (phba->sli_rev <= LPFC_SLI_REV3) {
4586                         link_speed = lpfc_sli_port_speed_get(phba);
4587                 } else {
4588                         if (phba->sli4_hba.link_state.logical_speed)
4589                                 link_speed =
4590                                       phba->sli4_hba.link_state.logical_speed;
4591                         else
4592                                 link_speed = phba->sli4_hba.link_state.speed;
4593                 }
4594                 if (link_speed != 0)
4595                         snprintf(lpfcinfobuf + len, 384-len,
4596                                  " Logical Link Speed: %d Mbps", link_speed);
4597         }
4598         return lpfcinfobuf;
4599 }
4600
4601 /**
4602  * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
4603  * @phba: The Hba for which this call is being executed.
4604  *
4605  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
4606  * The default value of cfg_poll_tmo is 10 milliseconds.
4607  **/
4608 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
4609 {
4610         unsigned long  poll_tmo_expires =
4611                 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
4612
4613         if (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq))
4614                 mod_timer(&phba->fcp_poll_timer,
4615                           poll_tmo_expires);
4616 }
4617
4618 /**
4619  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
4620  * @phba: The Hba for which this call is being executed.
4621  *
4622  * This routine starts the fcp_poll_timer of @phba.
4623  **/
4624 void lpfc_poll_start_timer(struct lpfc_hba * phba)
4625 {
4626         lpfc_poll_rearm_timer(phba);
4627 }
4628
4629 /**
4630  * lpfc_poll_timeout - Restart polling timer
4631  * @ptr: Map to lpfc_hba data structure pointer.
4632  *
4633  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
4634  * and FCP Ring interrupt is disable.
4635  **/
4636
4637 void lpfc_poll_timeout(unsigned long ptr)
4638 {
4639         struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
4640
4641         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4642                 lpfc_sli_handle_fast_ring_event(phba,
4643                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4644
4645                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4646                         lpfc_poll_rearm_timer(phba);
4647         }
4648 }
4649
4650 /**
4651  * lpfc_queuecommand - scsi_host_template queuecommand entry point
4652  * @cmnd: Pointer to scsi_cmnd data structure.
4653  * @done: Pointer to done routine.
4654  *
4655  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
4656  * This routine prepares an IOCB from scsi command and provides to firmware.
4657  * The @done callback is invoked after driver finished processing the command.
4658  *
4659  * Return value :
4660  *   0 - Success
4661  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
4662  **/
4663 static int
4664 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
4665 {
4666         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4667         struct lpfc_hba   *phba = vport->phba;
4668         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
4669         struct lpfc_nodelist *ndlp;
4670         struct lpfc_scsi_buf *lpfc_cmd;
4671         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
4672         int err;
4673
4674         err = fc_remote_port_chkready(rport);
4675         if (err) {
4676                 cmnd->result = err;
4677                 goto out_fail_command;
4678         }
4679         ndlp = rdata->pnode;
4680
4681         if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
4682                 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
4683
4684                 lpfc_printf_log(phba, KERN_ERR, LOG_BG,
4685                                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
4686                                 " op:%02x str=%s without registering for"
4687                                 " BlockGuard - Rejecting command\n",
4688                                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
4689                                 dif_op_str[scsi_get_prot_op(cmnd)]);
4690                 goto out_fail_command;
4691         }
4692
4693         /*
4694          * Catch race where our node has transitioned, but the
4695          * transport is still transitioning.
4696          */
4697         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
4698                 goto out_tgt_busy;
4699         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
4700                 goto out_tgt_busy;
4701
4702         lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp);
4703         if (lpfc_cmd == NULL) {
4704                 lpfc_rampdown_queue_depth(phba);
4705
4706                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
4707                                  "0707 driver's buffer pool is empty, "
4708                                  "IO busied\n");
4709                 goto out_host_busy;
4710         }
4711
4712         /*
4713          * Store the midlayer's command structure for the completion phase
4714          * and complete the command initialization.
4715          */
4716         lpfc_cmd->pCmd  = cmnd;
4717         lpfc_cmd->rdata = rdata;
4718         lpfc_cmd->timeout = 0;
4719         lpfc_cmd->start_time = jiffies;
4720         cmnd->host_scribble = (unsigned char *)lpfc_cmd;
4721
4722         if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
4723                 if (vport->phba->cfg_enable_bg) {
4724                         lpfc_printf_vlog(vport,
4725                                          KERN_INFO, LOG_SCSI_CMD,
4726                                          "9033 BLKGRD: rcvd %s cmd:x%x "
4727                                          "sector x%llx cnt %u pt %x\n",
4728                                          dif_op_str[scsi_get_prot_op(cmnd)],
4729                                          cmnd->cmnd[0],
4730                                          (unsigned long long)scsi_get_lba(cmnd),
4731                                          blk_rq_sectors(cmnd->request),
4732                                          (cmnd->cmnd[1]>>5));
4733                 }
4734                 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
4735         } else {
4736                 if (vport->phba->cfg_enable_bg) {
4737                         lpfc_printf_vlog(vport,
4738                                          KERN_INFO, LOG_SCSI_CMD,
4739                                          "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
4740                                          "x%x sector x%llx cnt %u pt %x\n",
4741                                          cmnd->cmnd[0],
4742                                          (unsigned long long)scsi_get_lba(cmnd),
4743                                          blk_rq_sectors(cmnd->request),
4744                                          (cmnd->cmnd[1]>>5));
4745                 }
4746                 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
4747         }
4748
4749         if (err)
4750                 goto out_host_busy_free_buf;
4751
4752         lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
4753
4754         atomic_inc(&ndlp->cmd_pending);
4755         err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
4756                                   &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
4757         if (err) {
4758                 atomic_dec(&ndlp->cmd_pending);
4759                 goto out_host_busy_free_buf;
4760         }
4761         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
4762                 lpfc_sli_handle_fast_ring_event(phba,
4763                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4764
4765                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4766                         lpfc_poll_rearm_timer(phba);
4767         }
4768
4769         return 0;
4770
4771  out_host_busy_free_buf:
4772         lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
4773         lpfc_release_scsi_buf(phba, lpfc_cmd);
4774  out_host_busy:
4775         return SCSI_MLQUEUE_HOST_BUSY;
4776
4777  out_tgt_busy:
4778         return SCSI_MLQUEUE_TARGET_BUSY;
4779
4780  out_fail_command:
4781         cmnd->scsi_done(cmnd);
4782         return 0;
4783 }
4784
4785
4786 /**
4787  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
4788  * @cmnd: Pointer to scsi_cmnd data structure.
4789  *
4790  * This routine aborts @cmnd pending in base driver.
4791  *
4792  * Return code :
4793  *   0x2003 - Error
4794  *   0x2002 - Success
4795  **/
4796 static int
4797 lpfc_abort_handler(struct scsi_cmnd *cmnd)
4798 {
4799         struct Scsi_Host  *shost = cmnd->device->host;
4800         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
4801         struct lpfc_hba   *phba = vport->phba;
4802         struct lpfc_iocbq *iocb;
4803         struct lpfc_iocbq *abtsiocb;
4804         struct lpfc_scsi_buf *lpfc_cmd;
4805         IOCB_t *cmd, *icmd;
4806         int ret = SUCCESS, status = 0;
4807         unsigned long flags;
4808         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
4809
4810         status = fc_block_scsi_eh(cmnd);
4811         if (status != 0 && status != SUCCESS)
4812                 return status;
4813
4814         spin_lock_irqsave(&phba->hbalock, flags);
4815         /* driver queued commands are in process of being flushed */
4816         if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) {
4817                 spin_unlock_irqrestore(&phba->hbalock, flags);
4818                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4819                         "3168 SCSI Layer abort requested I/O has been "
4820                         "flushed by LLD.\n");
4821                 return FAILED;
4822         }
4823
4824         lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
4825         if (!lpfc_cmd || !lpfc_cmd->pCmd) {
4826                 spin_unlock_irqrestore(&phba->hbalock, flags);
4827                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4828                          "2873 SCSI Layer I/O Abort Request IO CMPL Status "
4829                          "x%x ID %d LUN %d\n",
4830                          SUCCESS, cmnd->device->id, cmnd->device->lun);
4831                 return SUCCESS;
4832         }
4833
4834         iocb = &lpfc_cmd->cur_iocbq;
4835         /* the command is in process of being cancelled */
4836         if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
4837                 spin_unlock_irqrestore(&phba->hbalock, flags);
4838                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4839                         "3169 SCSI Layer abort requested I/O has been "
4840                         "cancelled by LLD.\n");
4841                 return FAILED;
4842         }
4843         /*
4844          * If pCmd field of the corresponding lpfc_scsi_buf structure
4845          * points to a different SCSI command, then the driver has
4846          * already completed this command, but the midlayer did not
4847          * see the completion before the eh fired. Just return SUCCESS.
4848          */
4849         if (lpfc_cmd->pCmd != cmnd) {
4850                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4851                         "3170 SCSI Layer abort requested I/O has been "
4852                         "completed by LLD.\n");
4853                 goto out_unlock;
4854         }
4855
4856         BUG_ON(iocb->context1 != lpfc_cmd);
4857
4858         abtsiocb = __lpfc_sli_get_iocbq(phba);
4859         if (abtsiocb == NULL) {
4860                 ret = FAILED;
4861                 goto out_unlock;
4862         }
4863
4864         /*
4865          * The scsi command can not be in txq and it is in flight because the
4866          * pCmd is still pointig at the SCSI command we have to abort. There
4867          * is no need to search the txcmplq. Just send an abort to the FW.
4868          */
4869
4870         cmd = &iocb->iocb;
4871         icmd = &abtsiocb->iocb;
4872         icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
4873         icmd->un.acxri.abortContextTag = cmd->ulpContext;
4874         if (phba->sli_rev == LPFC_SLI_REV4)
4875                 icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
4876         else
4877                 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
4878
4879         icmd->ulpLe = 1;
4880         icmd->ulpClass = cmd->ulpClass;
4881
4882         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
4883         abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
4884         abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
4885
4886         if (lpfc_is_link_up(phba))
4887                 icmd->ulpCommand = CMD_ABORT_XRI_CN;
4888         else
4889                 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
4890
4891         abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
4892         abtsiocb->vport = vport;
4893         /* no longer need the lock after this point */
4894         spin_unlock_irqrestore(&phba->hbalock, flags);
4895
4896         if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
4897             IOCB_ERROR) {
4898                 lpfc_sli_release_iocbq(phba, abtsiocb);
4899                 ret = FAILED;
4900                 goto out;
4901         }
4902
4903         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
4904                 lpfc_sli_handle_fast_ring_event(phba,
4905                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
4906
4907         lpfc_cmd->waitq = &waitq;
4908         /* Wait for abort to complete */
4909         wait_event_timeout(waitq,
4910                           (lpfc_cmd->pCmd != cmnd),
4911                            msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
4912         lpfc_cmd->waitq = NULL;
4913
4914         if (lpfc_cmd->pCmd == cmnd) {
4915                 ret = FAILED;
4916                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
4917                                  "0748 abort handler timed out waiting "
4918                                  "for abortng I/O (xri:x%x) to complete: "
4919                                  "ret %#x, ID %d, LUN %d\n",
4920                                  iocb->sli4_xritag, ret,
4921                                  cmnd->device->id, cmnd->device->lun);
4922         }
4923         goto out;
4924
4925 out_unlock:
4926         spin_unlock_irqrestore(&phba->hbalock, flags);
4927 out:
4928         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
4929                          "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
4930                          "LUN %d\n", ret, cmnd->device->id,
4931                          cmnd->device->lun);
4932         return ret;
4933 }
4934
4935 static char *
4936 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
4937 {
4938         switch (task_mgmt_cmd) {
4939         case FCP_ABORT_TASK_SET:
4940                 return "ABORT_TASK_SET";
4941         case FCP_CLEAR_TASK_SET:
4942                 return "FCP_CLEAR_TASK_SET";
4943         case FCP_BUS_RESET:
4944                 return "FCP_BUS_RESET";
4945         case FCP_LUN_RESET:
4946                 return "FCP_LUN_RESET";
4947         case FCP_TARGET_RESET:
4948                 return "FCP_TARGET_RESET";
4949         case FCP_CLEAR_ACA:
4950                 return "FCP_CLEAR_ACA";
4951         case FCP_TERMINATE_TASK:
4952                 return "FCP_TERMINATE_TASK";
4953         default:
4954                 return "unknown";
4955         }
4956 }
4957
4958 /**
4959  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
4960  * @vport: The virtual port for which this call is being executed.
4961  * @rdata: Pointer to remote port local data
4962  * @tgt_id: Target ID of remote device.
4963  * @lun_id: Lun number for the TMF
4964  * @task_mgmt_cmd: type of TMF to send
4965  *
4966  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
4967  * a remote port.
4968  *
4969  * Return Code:
4970  *   0x2003 - Error
4971  *   0x2002 - Success.
4972  **/
4973 static int
4974 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
4975                     unsigned  tgt_id, unsigned int lun_id,
4976                     uint8_t task_mgmt_cmd)
4977 {
4978         struct lpfc_hba   *phba = vport->phba;
4979         struct lpfc_scsi_buf *lpfc_cmd;
4980         struct lpfc_iocbq *iocbq;
4981         struct lpfc_iocbq *iocbqrsp;
4982         struct lpfc_nodelist *pnode = rdata->pnode;
4983         int ret;
4984         int status;
4985
4986         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
4987                 return FAILED;
4988
4989         lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode);
4990         if (lpfc_cmd == NULL)
4991                 return FAILED;
4992         lpfc_cmd->timeout = 60;
4993         lpfc_cmd->rdata = rdata;
4994
4995         status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
4996                                            task_mgmt_cmd);
4997         if (!status) {
4998                 lpfc_release_scsi_buf(phba, lpfc_cmd);
4999                 return FAILED;
5000         }
5001
5002         iocbq = &lpfc_cmd->cur_iocbq;
5003         iocbqrsp = lpfc_sli_get_iocbq(phba);
5004         if (iocbqrsp == NULL) {
5005                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5006                 return FAILED;
5007         }
5008
5009         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5010                          "0702 Issue %s to TGT %d LUN %d "
5011                          "rpi x%x nlp_flag x%x Data: x%x x%x\n",
5012                          lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
5013                          pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
5014                          iocbq->iocb_flag);
5015
5016         status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
5017                                           iocbq, iocbqrsp, lpfc_cmd->timeout);
5018         if (status != IOCB_SUCCESS) {
5019                 if (status == IOCB_TIMEDOUT) {
5020                         iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
5021                         ret = TIMEOUT_ERROR;
5022                 } else
5023                         ret = FAILED;
5024                 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
5025                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5026                          "0727 TMF %s to TGT %d LUN %d failed (%d, %d) "
5027                          "iocb_flag x%x\n",
5028                          lpfc_taskmgmt_name(task_mgmt_cmd),
5029                          tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
5030                          iocbqrsp->iocb.un.ulpWord[4],
5031                          iocbq->iocb_flag);
5032         } else if (status == IOCB_BUSY)
5033                 ret = FAILED;
5034         else
5035                 ret = SUCCESS;
5036
5037         lpfc_sli_release_iocbq(phba, iocbqrsp);
5038
5039         if (ret != TIMEOUT_ERROR)
5040                 lpfc_release_scsi_buf(phba, lpfc_cmd);
5041
5042         return ret;
5043 }
5044
5045 /**
5046  * lpfc_chk_tgt_mapped -
5047  * @vport: The virtual port to check on
5048  * @cmnd: Pointer to scsi_cmnd data structure.
5049  *
5050  * This routine delays until the scsi target (aka rport) for the
5051  * command exists (is present and logged in) or we declare it non-existent.
5052  *
5053  * Return code :
5054  *  0x2003 - Error
5055  *  0x2002 - Success
5056  **/
5057 static int
5058 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
5059 {
5060         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
5061         struct lpfc_nodelist *pnode;
5062         unsigned long later;
5063
5064         if (!rdata) {
5065                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
5066                         "0797 Tgt Map rport failure: rdata x%p\n", rdata);
5067                 return FAILED;
5068         }
5069         pnode = rdata->pnode;
5070         /*
5071          * If target is not in a MAPPED state, delay until
5072          * target is rediscovered or devloss timeout expires.
5073          */
5074         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5075         while (time_after(later, jiffies)) {
5076                 if (!pnode || !NLP_CHK_NODE_ACT(pnode))
5077                         return FAILED;
5078                 if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
5079                         return SUCCESS;
5080                 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
5081                 rdata = cmnd->device->hostdata;
5082                 if (!rdata)
5083                         return FAILED;
5084                 pnode = rdata->pnode;
5085         }
5086         if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
5087             (pnode->nlp_state != NLP_STE_MAPPED_NODE))
5088                 return FAILED;
5089         return SUCCESS;
5090 }
5091
5092 /**
5093  * lpfc_reset_flush_io_context -
5094  * @vport: The virtual port (scsi_host) for the flush context
5095  * @tgt_id: If aborting by Target contect - specifies the target id
5096  * @lun_id: If aborting by Lun context - specifies the lun id
5097  * @context: specifies the context level to flush at.
5098  *
5099  * After a reset condition via TMF, we need to flush orphaned i/o
5100  * contexts from the adapter. This routine aborts any contexts
5101  * outstanding, then waits for their completions. The wait is
5102  * bounded by devloss_tmo though.
5103  *
5104  * Return code :
5105  *  0x2003 - Error
5106  *  0x2002 - Success
5107  **/
5108 static int
5109 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
5110                         uint64_t lun_id, lpfc_ctx_cmd context)
5111 {
5112         struct lpfc_hba   *phba = vport->phba;
5113         unsigned long later;
5114         int cnt;
5115
5116         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5117         if (cnt)
5118                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
5119                                     tgt_id, lun_id, context);
5120         later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
5121         while (time_after(later, jiffies) && cnt) {
5122                 schedule_timeout_uninterruptible(msecs_to_jiffies(20));
5123                 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
5124         }
5125         if (cnt) {
5126                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5127                         "0724 I/O flush failure for context %s : cnt x%x\n",
5128                         ((context == LPFC_CTX_LUN) ? "LUN" :
5129                          ((context == LPFC_CTX_TGT) ? "TGT" :
5130                           ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
5131                         cnt);
5132                 return FAILED;
5133         }
5134         return SUCCESS;
5135 }
5136
5137 /**
5138  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
5139  * @cmnd: Pointer to scsi_cmnd data structure.
5140  *
5141  * This routine does a device reset by sending a LUN_RESET task management
5142  * command.
5143  *
5144  * Return code :
5145  *  0x2003 - Error
5146  *  0x2002 - Success
5147  **/
5148 static int
5149 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
5150 {
5151         struct Scsi_Host  *shost = cmnd->device->host;
5152         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5153         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
5154         struct lpfc_nodelist *pnode;
5155         unsigned tgt_id = cmnd->device->id;
5156         unsigned int lun_id = cmnd->device->lun;
5157         struct lpfc_scsi_event_header scsi_event;
5158         int status, ret = SUCCESS;
5159
5160         if (!rdata) {
5161                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5162                         "0798 Device Reset rport failure: rdata x%p\n", rdata);
5163                 return FAILED;
5164         }
5165         pnode = rdata->pnode;
5166         status = fc_block_scsi_eh(cmnd);
5167         if (status != 0 && status != SUCCESS)
5168                 return status;
5169
5170         status = lpfc_chk_tgt_mapped(vport, cmnd);
5171         if (status == FAILED) {
5172                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5173                         "0721 Device Reset rport failure: rdata x%p\n", rdata);
5174                 return FAILED;
5175         }
5176
5177         scsi_event.event_type = FC_REG_SCSI_EVENT;
5178         scsi_event.subcategory = LPFC_EVENT_LUNRESET;
5179         scsi_event.lun = lun_id;
5180         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5181         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5182
5183         fc_host_post_vendor_event(shost, fc_get_event_number(),
5184                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5185
5186         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5187                                                 FCP_LUN_RESET);
5188
5189         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5190                          "0713 SCSI layer issued Device Reset (%d, %d) "
5191                          "return x%x\n", tgt_id, lun_id, status);
5192
5193         /*
5194          * We have to clean up i/o as : they may be orphaned by the TMF;
5195          * or if the TMF failed, they may be in an indeterminate state.
5196          * So, continue on.
5197          * We will report success if all the i/o aborts successfully.
5198          */
5199         ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5200                                                 LPFC_CTX_LUN);
5201         return ret;
5202 }
5203
5204 /**
5205  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
5206  * @cmnd: Pointer to scsi_cmnd data structure.
5207  *
5208  * This routine does a target reset by sending a TARGET_RESET task management
5209  * command.
5210  *
5211  * Return code :
5212  *  0x2003 - Error
5213  *  0x2002 - Success
5214  **/
5215 static int
5216 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
5217 {
5218         struct Scsi_Host  *shost = cmnd->device->host;
5219         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5220         struct lpfc_rport_data *rdata = cmnd->device->hostdata;
5221         struct lpfc_nodelist *pnode;
5222         unsigned tgt_id = cmnd->device->id;
5223         unsigned int lun_id = cmnd->device->lun;
5224         struct lpfc_scsi_event_header scsi_event;
5225         int status, ret = SUCCESS;
5226
5227         if (!rdata) {
5228                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5229                         "0799 Target Reset rport failure: rdata x%p\n", rdata);
5230                 return FAILED;
5231         }
5232         pnode = rdata->pnode;
5233         status = fc_block_scsi_eh(cmnd);
5234         if (status != 0 && status != SUCCESS)
5235                 return status;
5236
5237         status = lpfc_chk_tgt_mapped(vport, cmnd);
5238         if (status == FAILED) {
5239                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5240                         "0722 Target Reset rport failure: rdata x%p\n", rdata);
5241                 return FAILED;
5242         }
5243
5244         scsi_event.event_type = FC_REG_SCSI_EVENT;
5245         scsi_event.subcategory = LPFC_EVENT_TGTRESET;
5246         scsi_event.lun = 0;
5247         memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
5248         memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
5249
5250         fc_host_post_vendor_event(shost, fc_get_event_number(),
5251                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5252
5253         status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
5254                                         FCP_TARGET_RESET);
5255
5256         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5257                          "0723 SCSI layer issued Target Reset (%d, %d) "
5258                          "return x%x\n", tgt_id, lun_id, status);
5259
5260         /*
5261          * We have to clean up i/o as : they may be orphaned by the TMF;
5262          * or if the TMF failed, they may be in an indeterminate state.
5263          * So, continue on.
5264          * We will report success if all the i/o aborts successfully.
5265          */
5266         ret = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
5267                                           LPFC_CTX_TGT);
5268         return ret;
5269 }
5270
5271 /**
5272  * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
5273  * @cmnd: Pointer to scsi_cmnd data structure.
5274  *
5275  * This routine does target reset to all targets on @cmnd->device->host.
5276  * This emulates Parallel SCSI Bus Reset Semantics.
5277  *
5278  * Return code :
5279  *  0x2003 - Error
5280  *  0x2002 - Success
5281  **/
5282 static int
5283 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
5284 {
5285         struct Scsi_Host  *shost = cmnd->device->host;
5286         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5287         struct lpfc_nodelist *ndlp = NULL;
5288         struct lpfc_scsi_event_header scsi_event;
5289         int match;
5290         int ret = SUCCESS, status, i;
5291
5292         scsi_event.event_type = FC_REG_SCSI_EVENT;
5293         scsi_event.subcategory = LPFC_EVENT_BUSRESET;
5294         scsi_event.lun = 0;
5295         memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
5296         memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));
5297
5298         fc_host_post_vendor_event(shost, fc_get_event_number(),
5299                 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
5300
5301         status = fc_block_scsi_eh(cmnd);
5302         if (status != 0 && status != SUCCESS)
5303                 return status;
5304
5305         /*
5306          * Since the driver manages a single bus device, reset all
5307          * targets known to the driver.  Should any target reset
5308          * fail, this routine returns failure to the midlayer.
5309          */
5310         for (i = 0; i < LPFC_MAX_TARGET; i++) {
5311                 /* Search for mapped node by target ID */
5312                 match = 0;
5313                 spin_lock_irq(shost->host_lock);
5314                 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
5315                         if (!NLP_CHK_NODE_ACT(ndlp))
5316                                 continue;
5317                         if (vport->phba->cfg_fcp2_no_tgt_reset &&
5318                             (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
5319                                 continue;
5320                         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
5321                             ndlp->nlp_sid == i &&
5322                             ndlp->rport) {
5323                                 match = 1;
5324                                 break;
5325                         }
5326                 }
5327                 spin_unlock_irq(shost->host_lock);
5328                 if (!match)
5329                         continue;
5330
5331                 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
5332                                         i, 0, FCP_TARGET_RESET);
5333
5334                 if (status != SUCCESS) {
5335                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5336                                          "0700 Bus Reset on target %d failed\n",
5337                                          i);
5338                         ret = FAILED;
5339                 }
5340         }
5341         /*
5342          * We have to clean up i/o as : they may be orphaned by the TMFs
5343          * above; or if any of the TMFs failed, they may be in an
5344          * indeterminate state.
5345          * We will report success if all the i/o aborts successfully.
5346          */
5347
5348         status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
5349         if (status != SUCCESS)
5350                 ret = FAILED;
5351
5352         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5353                          "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
5354         return ret;
5355 }
5356
5357 /**
5358  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
5359  * @cmnd: Pointer to scsi_cmnd data structure.
5360  *
5361  * This routine does host reset to the adaptor port. It brings the HBA
5362  * offline, performs a board restart, and then brings the board back online.
5363  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
5364  * reject all outstanding SCSI commands to the host and error returned
5365  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
5366  * of error handling, it will only return error if resetting of the adapter
5367  * is not successful; in all other cases, will return success.
5368  *
5369  * Return code :
5370  *  0x2003 - Error
5371  *  0x2002 - Success
5372  **/
5373 static int
5374 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
5375 {
5376         struct Scsi_Host *shost = cmnd->device->host;
5377         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
5378         struct lpfc_hba *phba = vport->phba;
5379         int rc, ret = SUCCESS;
5380
5381         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5382                          "3172 SCSI layer issued Host Reset Data:\n");
5383
5384         lpfc_offline_prep(phba, LPFC_MBX_WAIT);
5385         lpfc_offline(phba);
5386         rc = lpfc_sli_brdrestart(phba);
5387         if (rc)
5388                 ret = FAILED;
5389         rc = lpfc_online(phba);
5390         if (rc)
5391                 ret = FAILED;
5392         lpfc_unblock_mgmt_io(phba);
5393
5394         if (ret == FAILED) {
5395                 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5396                                  "3323 Failed host reset, bring it offline\n");
5397                 lpfc_sli4_offline_eratt(phba);
5398         }
5399         return ret;
5400 }
5401
5402 /**
5403  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
5404  * @sdev: Pointer to scsi_device.
5405  *
5406  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
5407  * globally available list of scsi buffers. This routine also makes sure scsi
5408  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
5409  * of scsi buffer exists for the lifetime of the driver.
5410  *
5411  * Return codes:
5412  *   non-0 - Error
5413  *   0 - Success
5414  **/
5415 static int
5416 lpfc_slave_alloc(struct scsi_device *sdev)
5417 {
5418         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5419         struct lpfc_hba   *phba = vport->phba;
5420         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
5421         uint32_t total = 0;
5422         uint32_t num_to_alloc = 0;
5423         int num_allocated = 0;
5424         uint32_t sdev_cnt;
5425
5426         if (!rport || fc_remote_port_chkready(rport))
5427                 return -ENXIO;
5428
5429         sdev->hostdata = rport->dd_data;
5430         sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
5431
5432         /*
5433          * Populate the cmds_per_lun count scsi_bufs into this host's globally
5434          * available list of scsi buffers.  Don't allocate more than the
5435          * HBA limit conveyed to the midlayer via the host structure.  The
5436          * formula accounts for the lun_queue_depth + error handlers + 1
5437          * extra.  This list of scsi bufs exists for the lifetime of the driver.
5438          */
5439         total = phba->total_scsi_bufs;
5440         num_to_alloc = vport->cfg_lun_queue_depth + 2;
5441
5442         /* If allocated buffers are enough do nothing */
5443         if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
5444                 return 0;
5445
5446         /* Allow some exchanges to be available always to complete discovery */
5447         if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5448                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5449                                  "0704 At limitation of %d preallocated "
5450                                  "command buffers\n", total);
5451                 return 0;
5452         /* Allow some exchanges to be available always to complete discovery */
5453         } else if (total + num_to_alloc >
5454                 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
5455                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
5456                                  "0705 Allocation request of %d "
5457                                  "command buffers will exceed max of %d.  "
5458                                  "Reducing allocation request to %d.\n",
5459                                  num_to_alloc, phba->cfg_hba_queue_depth,
5460                                  (phba->cfg_hba_queue_depth - total));
5461                 num_to_alloc = phba->cfg_hba_queue_depth - total;
5462         }
5463         num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
5464         if (num_to_alloc != num_allocated) {
5465                         lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
5466                                          "0708 Allocation request of %d "
5467                                          "command buffers did not succeed.  "
5468                                          "Allocated %d buffers.\n",
5469                                          num_to_alloc, num_allocated);
5470         }
5471         if (num_allocated > 0)
5472                 phba->total_scsi_bufs += num_allocated;
5473         return 0;
5474 }
5475
5476 /**
5477  * lpfc_slave_configure - scsi_host_template slave_configure entry point
5478  * @sdev: Pointer to scsi_device.
5479  *
5480  * This routine configures following items
5481  *   - Tag command queuing support for @sdev if supported.
5482  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
5483  *
5484  * Return codes:
5485  *   0 - Success
5486  **/
5487 static int
5488 lpfc_slave_configure(struct scsi_device *sdev)
5489 {
5490         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5491         struct lpfc_hba   *phba = vport->phba;
5492
5493         if (sdev->tagged_supported)
5494                 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
5495         else
5496                 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
5497
5498         if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
5499                 lpfc_sli_handle_fast_ring_event(phba,
5500                         &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
5501                 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
5502                         lpfc_poll_rearm_timer(phba);
5503         }
5504
5505         return 0;
5506 }
5507
5508 /**
5509  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
5510  * @sdev: Pointer to scsi_device.
5511  *
5512  * This routine sets @sdev hostatdata filed to null.
5513  **/
5514 static void
5515 lpfc_slave_destroy(struct scsi_device *sdev)
5516 {
5517         struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
5518         struct lpfc_hba   *phba = vport->phba;
5519         atomic_dec(&phba->sdev_cnt);
5520         sdev->hostdata = NULL;
5521         return;
5522 }
5523
5524
5525 struct scsi_host_template lpfc_template = {
5526         .module                 = THIS_MODULE,
5527         .name                   = LPFC_DRIVER_NAME,
5528         .info                   = lpfc_info,
5529         .queuecommand           = lpfc_queuecommand,
5530         .eh_abort_handler       = lpfc_abort_handler,
5531         .eh_device_reset_handler = lpfc_device_reset_handler,
5532         .eh_target_reset_handler = lpfc_target_reset_handler,
5533         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5534         .eh_host_reset_handler  = lpfc_host_reset_handler,
5535         .slave_alloc            = lpfc_slave_alloc,
5536         .slave_configure        = lpfc_slave_configure,
5537         .slave_destroy          = lpfc_slave_destroy,
5538         .scan_finished          = lpfc_scan_finished,
5539         .this_id                = -1,
5540         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5541         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5542         .use_clustering         = ENABLE_CLUSTERING,
5543         .shost_attrs            = lpfc_hba_attrs,
5544         .max_sectors            = 0xFFFF,
5545         .vendor_id              = LPFC_NL_VENDOR_ID,
5546         .change_queue_depth     = lpfc_change_queue_depth,
5547         .change_queue_type      = lpfc_change_queue_type,
5548 };
5549
5550 struct scsi_host_template lpfc_vport_template = {
5551         .module                 = THIS_MODULE,
5552         .name                   = LPFC_DRIVER_NAME,
5553         .info                   = lpfc_info,
5554         .queuecommand           = lpfc_queuecommand,
5555         .eh_abort_handler       = lpfc_abort_handler,
5556         .eh_device_reset_handler = lpfc_device_reset_handler,
5557         .eh_target_reset_handler = lpfc_target_reset_handler,
5558         .eh_bus_reset_handler   = lpfc_bus_reset_handler,
5559         .slave_alloc            = lpfc_slave_alloc,
5560         .slave_configure        = lpfc_slave_configure,
5561         .slave_destroy          = lpfc_slave_destroy,
5562         .scan_finished          = lpfc_scan_finished,
5563         .this_id                = -1,
5564         .sg_tablesize           = LPFC_DEFAULT_SG_SEG_CNT,
5565         .cmd_per_lun            = LPFC_CMD_PER_LUN,
5566         .use_clustering         = ENABLE_CLUSTERING,
5567         .shost_attrs            = lpfc_vport_attrs,
5568         .max_sectors            = 0xFFFF,
5569         .change_queue_depth     = lpfc_change_queue_depth,
5570         .change_queue_type      = lpfc_change_queue_type,
5571 };