2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
10 #include <linux/module.h>
11 #include <linux/pci.h>
12 #include <linux/kernel.h>
13 #include <linux/if_arp.h>
14 #include <scsi/iscsi_if.h>
15 #include <linux/inet.h>
17 #include <linux/list.h>
18 #include <linux/kthread.h>
20 #include <linux/if_vlan.h>
21 #include <linux/cpu.h>
23 #include <scsi/scsi_cmnd.h>
24 #include <scsi/scsi_device.h>
25 #include <scsi/scsi_eh.h>
26 #include <scsi/scsi_host.h>
27 #include <scsi/scsi.h>
31 #include "qedi_iscsi.h"
33 static uint qedi_fw_debug;
34 module_param(qedi_fw_debug, uint, 0644);
35 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
37 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
38 module_param(qedi_dbg_log, uint, 0644);
39 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
42 module_param(qedi_io_tracing, uint, 0644);
43 MODULE_PARM_DESC(qedi_io_tracing,
44 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
46 const struct qed_iscsi_ops *qedi_ops;
47 static struct scsi_transport_template *qedi_scsi_transport;
48 static struct pci_driver qedi_pci_driver;
49 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
50 static LIST_HEAD(qedi_udev_list);
51 /* Static function declaration */
52 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
53 static void qedi_free_global_queues(struct qedi_ctx *qedi);
54 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
55 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
56 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
58 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
60 struct qedi_ctx *qedi;
61 struct qedi_endpoint *qedi_ep;
62 struct async_data *data;
65 if (!context || !fw_handle) {
66 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
70 qedi = (struct qedi_ctx *)context;
71 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
72 "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
74 data = (struct async_data *)fw_handle;
75 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
76 "cid=0x%x tid=0x%x err-code=0x%x fw-dbg-param=0x%x\n",
77 data->cid, data->itid, data->error_code,
78 data->fw_debug_param);
80 qedi_ep = qedi->ep_tbl[data->cid];
83 QEDI_WARN(&qedi->dbg_ctx,
84 "Cannot process event, ep already disconnected, cid=0x%x\n",
90 switch (fw_event_code) {
91 case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
92 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
93 qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
95 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
97 case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
98 qedi_ep->state = EP_STATE_DISCONN_COMPL;
99 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
101 case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
102 qedi_process_iscsi_error(qedi_ep, data);
104 case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
105 case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
106 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
107 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
108 case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
109 case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
110 case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
111 qedi_process_tcp_error(qedi_ep, data);
114 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
121 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
123 struct qedi_uio_dev *udev = uinfo->priv;
124 struct qedi_ctx *qedi = udev->qedi;
126 if (!capable(CAP_NET_ADMIN))
129 if (udev->uio_dev != -1)
133 udev->uio_dev = iminor(inode);
134 qedi_reset_uio_rings(udev);
135 set_bit(UIO_DEV_OPENED, &qedi->flags);
141 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
143 struct qedi_uio_dev *udev = uinfo->priv;
144 struct qedi_ctx *qedi = udev->qedi;
147 clear_bit(UIO_DEV_OPENED, &qedi->flags);
148 qedi_ll2_free_skbs(qedi);
152 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
155 free_page((unsigned long)udev->uctrl);
159 if (udev->ll2_ring) {
160 free_page((unsigned long)udev->ll2_ring);
161 udev->ll2_ring = NULL;
165 free_pages((unsigned long)udev->ll2_buf, 2);
166 udev->ll2_buf = NULL;
170 static void __qedi_free_uio(struct qedi_uio_dev *udev)
172 uio_unregister_device(&udev->qedi_uinfo);
174 __qedi_free_uio_rings(udev);
176 pci_dev_put(udev->pdev);
180 static void qedi_free_uio(struct qedi_uio_dev *udev)
185 list_del_init(&udev->list);
186 __qedi_free_uio(udev);
189 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
191 struct qedi_ctx *qedi = NULL;
192 struct qedi_uio_ctrl *uctrl = NULL;
197 spin_lock_bh(&qedi->ll2_lock);
198 uctrl->host_rx_cons = 0;
199 uctrl->hw_rx_prod = 0;
200 uctrl->hw_rx_bd_prod = 0;
201 uctrl->host_rx_bd_cons = 0;
203 memset(udev->ll2_ring, 0, udev->ll2_ring_size);
204 memset(udev->ll2_buf, 0, udev->ll2_buf_size);
205 spin_unlock_bh(&qedi->ll2_lock);
208 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
212 if (udev->ll2_ring || udev->ll2_buf)
215 /* Memory for control area. */
216 udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
220 /* Allocating memory for LL2 ring */
221 udev->ll2_ring_size = QEDI_PAGE_SIZE;
222 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
223 if (!udev->ll2_ring) {
225 goto exit_alloc_ring;
228 /* Allocating memory for Tx/Rx pkt buffer */
229 udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
230 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
231 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
233 if (!udev->ll2_buf) {
240 free_page((unsigned long)udev->ll2_ring);
241 udev->ll2_ring = NULL;
246 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
248 struct qedi_uio_dev *udev = NULL;
251 list_for_each_entry(udev, &qedi_udev_list, list) {
252 if (udev->pdev == qedi->pdev) {
254 if (__qedi_alloc_uio_rings(udev)) {
263 udev = kzalloc(sizeof(*udev), GFP_KERNEL);
272 udev->pdev = qedi->pdev;
274 rc = __qedi_alloc_uio_rings(udev);
278 list_add(&udev->list, &qedi_udev_list);
280 pci_dev_get(udev->pdev);
283 udev->tx_pkt = udev->ll2_buf;
284 udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
293 static int qedi_init_uio(struct qedi_ctx *qedi)
295 struct qedi_uio_dev *udev = qedi->udev;
296 struct uio_info *uinfo;
302 uinfo = &udev->qedi_uinfo;
304 uinfo->mem[0].addr = (unsigned long)udev->uctrl;
305 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
306 uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
308 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
309 uinfo->mem[1].size = udev->ll2_ring_size;
310 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
312 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
313 uinfo->mem[2].size = udev->ll2_buf_size;
314 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
316 uinfo->name = "qedi_uio";
317 uinfo->version = QEDI_MODULE_VERSION;
318 uinfo->irq = UIO_IRQ_CUSTOM;
320 uinfo->open = qedi_uio_open;
321 uinfo->release = qedi_uio_close;
323 if (udev->uio_dev == -1) {
327 ret = uio_register_device(&udev->pdev->dev, uinfo);
329 QEDI_ERR(&qedi->dbg_ctx,
330 "UIO registration failed\n");
338 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
339 struct qed_sb_info *sb_info, u16 sb_id)
341 struct status_block *sb_virt;
345 sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
346 sizeof(struct status_block), &sb_phys,
349 QEDI_ERR(&qedi->dbg_ctx,
350 "Status block allocation failed for id = %d.\n",
355 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
356 sb_id, QED_SB_TYPE_STORAGE);
358 QEDI_ERR(&qedi->dbg_ctx,
359 "Status block initialization failed for id = %d.\n",
367 static void qedi_free_sb(struct qedi_ctx *qedi)
369 struct qed_sb_info *sb_info;
372 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
373 sb_info = &qedi->sb_array[id];
374 if (sb_info->sb_virt)
375 dma_free_coherent(&qedi->pdev->dev,
376 sizeof(*sb_info->sb_virt),
377 (void *)sb_info->sb_virt,
382 static void qedi_free_fp(struct qedi_ctx *qedi)
384 kfree(qedi->fp_array);
385 kfree(qedi->sb_array);
388 static void qedi_destroy_fp(struct qedi_ctx *qedi)
394 static int qedi_alloc_fp(struct qedi_ctx *qedi)
398 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
399 sizeof(struct qedi_fastpath), GFP_KERNEL);
400 if (!qedi->fp_array) {
401 QEDI_ERR(&qedi->dbg_ctx,
402 "fastpath fp array allocation failed.\n");
406 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
407 sizeof(struct qed_sb_info), GFP_KERNEL);
408 if (!qedi->sb_array) {
409 QEDI_ERR(&qedi->dbg_ctx,
410 "fastpath sb array allocation failed.\n");
422 static void qedi_int_fp(struct qedi_ctx *qedi)
424 struct qedi_fastpath *fp;
427 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
428 sizeof(*qedi->fp_array));
429 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
430 sizeof(*qedi->sb_array));
432 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
433 fp = &qedi->fp_array[id];
434 fp->sb_info = &qedi->sb_array[id];
437 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
440 /* fp_array[i] ---- irq cookie
441 * So init data which is needed in int ctx
446 static int qedi_prepare_fp(struct qedi_ctx *qedi)
448 struct qedi_fastpath *fp;
451 ret = qedi_alloc_fp(qedi);
457 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
458 fp = &qedi->fp_array[id];
459 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
461 QEDI_ERR(&qedi->dbg_ctx,
462 "SB allocation and initialization failed.\n");
477 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
481 qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
482 sizeof(u32), GFP_KERNEL);
483 if (!qedi->cid_que.cid_que_base)
486 qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
487 sizeof(struct qedi_conn *),
489 if (!qedi->cid_que.conn_cid_tbl) {
490 kfree(qedi->cid_que.cid_que_base);
491 qedi->cid_que.cid_que_base = NULL;
495 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
496 qedi->cid_que.cid_q_prod_idx = 0;
497 qedi->cid_que.cid_q_cons_idx = 0;
498 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
499 qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
501 for (i = 0; i < qedi->max_active_conns; i++) {
502 qedi->cid_que.cid_que[i] = i;
503 qedi->cid_que.conn_cid_tbl[i] = NULL;
509 static void qedi_release_cid_que(struct qedi_ctx *qedi)
511 kfree(qedi->cid_que.cid_que_base);
512 qedi->cid_que.cid_que_base = NULL;
514 kfree(qedi->cid_que.conn_cid_tbl);
515 qedi->cid_que.conn_cid_tbl = NULL;
518 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
519 u16 start_id, u16 next)
521 id_tbl->start = start_id;
524 spin_lock_init(&id_tbl->lock);
525 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
532 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
534 kfree(id_tbl->table);
535 id_tbl->table = NULL;
538 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
543 if (id >= id_tbl->max)
546 spin_lock(&id_tbl->lock);
547 if (!test_bit(id, id_tbl->table)) {
548 set_bit(id, id_tbl->table);
551 spin_unlock(&id_tbl->lock);
555 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
559 spin_lock(&id_tbl->lock);
560 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
561 if (id >= id_tbl->max) {
562 id = QEDI_LOCAL_PORT_INVALID;
563 if (id_tbl->next != 0) {
564 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
565 if (id >= id_tbl->next)
566 id = QEDI_LOCAL_PORT_INVALID;
570 if (id < id_tbl->max) {
571 set_bit(id, id_tbl->table);
572 id_tbl->next = (id + 1) & (id_tbl->max - 1);
576 spin_unlock(&id_tbl->lock);
581 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
583 if (id == QEDI_LOCAL_PORT_INVALID)
587 if (id >= id_tbl->max)
590 clear_bit(id, id_tbl->table);
593 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
597 qedi_free_id_tbl(&qedi->lcl_port_tbl);
600 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
604 qedi->ep_tbl = kzalloc((qedi->max_active_conns *
605 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
608 port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
609 if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
610 QEDI_LOCAL_PORT_MIN, port_id)) {
611 qedi_cm_free_mem(qedi);
618 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
620 struct Scsi_Host *shost;
621 struct qedi_ctx *qedi = NULL;
623 shost = iscsi_host_alloc(&qedi_host_template,
624 sizeof(struct qedi_ctx), 0);
626 QEDI_ERR(NULL, "Could not allocate shost\n");
627 goto exit_setup_shost;
630 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
631 shost->max_channel = 0;
633 shost->max_cmd_len = 16;
634 shost->transportt = qedi_scsi_transport;
636 qedi = iscsi_host_priv(shost);
637 memset(qedi, 0, sizeof(*qedi));
639 qedi->dbg_ctx.host_no = shost->host_no;
641 qedi->dbg_ctx.pdev = pdev;
642 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
643 qedi->max_sqes = QEDI_SQ_SIZE;
645 if (shost_use_blk_mq(shost))
646 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
648 pci_set_drvdata(pdev, qedi);
654 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
656 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
657 struct qedi_uio_dev *udev;
658 struct qedi_uio_ctrl *uctrl;
659 struct skb_work_list *work;
663 QEDI_ERR(NULL, "qedi is NULL\n");
667 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
668 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
669 "UIO DEV is not opened\n");
677 work = kzalloc(sizeof(*work), GFP_ATOMIC);
679 QEDI_WARN(&qedi->dbg_ctx,
680 "Could not allocate work so dropping frame.\n");
685 INIT_LIST_HEAD(&work->list);
688 if (skb_vlan_tag_present(skb))
689 work->vlan_id = skb_vlan_tag_get(skb);
692 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
694 spin_lock_bh(&qedi->ll2_lock);
695 list_add_tail(&work->list, &qedi->ll2_skb_list);
697 ++uctrl->hw_rx_prod_cnt;
698 prod = (uctrl->hw_rx_prod + 1) % RX_RING;
699 if (prod != uctrl->host_rx_cons) {
700 uctrl->hw_rx_prod = prod;
701 spin_unlock_bh(&qedi->ll2_lock);
702 wake_up_process(qedi->ll2_recv_thread);
706 spin_unlock_bh(&qedi->ll2_lock);
710 /* map this skb to iscsiuio mmaped region */
711 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
714 struct qedi_uio_dev *udev = NULL;
715 struct qedi_uio_ctrl *uctrl = NULL;
716 struct qedi_rx_bd rxbd;
717 struct qedi_rx_bd *p_rxbd;
723 QEDI_ERR(NULL, "qedi is NULL\n");
729 pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
730 len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
731 memcpy(pkt, skb->data, len);
733 memset(&rxbd, 0, sizeof(rxbd));
734 rxbd.rx_pkt_index = uctrl->hw_rx_prod;
735 rxbd.rx_pkt_len = len;
736 rxbd.vlan_id = vlan_id;
738 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
739 rx_bd_prod = uctrl->hw_rx_bd_prod;
740 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
741 p_rxbd += rx_bd_prod;
743 memcpy(p_rxbd, &rxbd, sizeof(rxbd));
745 /* notify the iscsiuio about new packet */
746 uio_event_notify(&udev->qedi_uinfo);
751 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
753 struct skb_work_list *work, *work_tmp;
755 spin_lock_bh(&qedi->ll2_lock);
756 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
757 list_del(&work->list);
759 kfree_skb(work->skb);
762 spin_unlock_bh(&qedi->ll2_lock);
765 static int qedi_ll2_recv_thread(void *arg)
767 struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
768 struct skb_work_list *work, *work_tmp;
770 set_user_nice(current, -20);
772 while (!kthread_should_stop()) {
773 spin_lock_bh(&qedi->ll2_lock);
774 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
776 list_del(&work->list);
777 qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
778 kfree_skb(work->skb);
781 set_current_state(TASK_INTERRUPTIBLE);
782 spin_unlock_bh(&qedi->ll2_lock);
786 __set_current_state(TASK_RUNNING);
790 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
796 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "Min number of MSIX %d\n",
797 MIN_NUM_CPUS_MSIX(qedi));
799 num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
801 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
803 memset(&qedi->pf_params.iscsi_pf_params, 0,
804 sizeof(qedi->pf_params.iscsi_pf_params));
806 qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
807 qedi->num_queues * sizeof(struct qedi_glbl_q_params),
810 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
815 rval = qedi_alloc_global_queues(qedi);
817 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
822 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
823 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
824 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
825 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
826 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
827 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
828 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
829 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
830 qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
831 qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
833 for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
834 if ((1 << log_page_size) == PAGE_SIZE)
837 qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
839 qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
840 (u64)qedi->hw_p_cpuq;
842 /* RQ BDQ initializations.
843 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
844 * rqe_log_size: 8 for 256B RQE
846 qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
847 /* BDQ address and size */
848 qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
849 qedi->bdq_pbl_list_dma;
850 qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
851 qedi->bdq_pbl_list_num_entries;
852 qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
854 /* cq_num_entries: num_tasks + rq_num_entries */
855 qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
857 qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
858 qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
859 qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
865 /* Free DMA coherent memory for array of queue pointers we pass to qed */
866 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
871 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
872 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
876 qedi_free_global_queues(qedi);
878 kfree(qedi->global_queues);
881 static void qedi_link_update(void *dev, struct qed_link_output *link)
883 struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
886 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
887 atomic_set(&qedi->link_state, QEDI_LINK_UP);
889 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
890 "Link Down event.\n");
891 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
895 static struct qed_iscsi_cb_ops qedi_cb_ops = {
897 .link_update = qedi_link_update,
901 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
902 u16 que_idx, struct qedi_percpu_s *p)
904 struct qedi_work *qedi_work;
905 struct qedi_conn *q_conn;
906 struct iscsi_conn *conn;
907 struct qedi_cmd *qedi_cmd;
911 iscsi_cid = cqe->cqe_common.conn_id;
912 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
914 QEDI_WARN(&qedi->dbg_ctx,
915 "Session no longer exists for cid=0x%x!!\n",
919 conn = q_conn->cls_conn->dd_data;
921 switch (cqe->cqe_common.cqe_type) {
922 case ISCSI_CQE_TYPE_SOLICITED:
923 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
924 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
929 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
930 qedi_cmd->cqe_work.qedi = qedi;
931 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
932 qedi_cmd->cqe_work.que_idx = que_idx;
933 qedi_cmd->cqe_work.is_solicited = true;
934 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
936 case ISCSI_CQE_TYPE_UNSOLICITED:
937 case ISCSI_CQE_TYPE_DUMMY:
938 case ISCSI_CQE_TYPE_TASK_CLEANUP:
939 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
944 INIT_LIST_HEAD(&qedi_work->list);
945 qedi_work->qedi = qedi;
946 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
947 qedi_work->que_idx = que_idx;
948 qedi_work->is_solicited = false;
949 list_add_tail(&qedi_work->list, &p->work_list);
953 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
958 static bool qedi_process_completions(struct qedi_fastpath *fp)
960 struct qedi_ctx *qedi = fp->qedi;
961 struct qed_sb_info *sb_info = fp->sb_info;
962 struct status_block *sb = sb_info->sb_virt;
963 struct qedi_percpu_s *p = NULL;
964 struct global_queue *que;
967 union iscsi_cqe *cqe;
971 /* Get the current firmware producer index */
972 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
974 if (prod_idx >= QEDI_CQ_SIZE)
975 prod_idx = prod_idx % QEDI_CQ_SIZE;
977 que = qedi->global_queues[fp->sb_id];
978 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
979 "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
980 que, prod_idx, que->cq_cons_idx, fp->sb_id);
982 qedi->intr_cpu = fp->sb_id;
983 cpu = smp_processor_id();
984 p = &per_cpu(qedi_percpu, cpu);
986 if (unlikely(!p->iothread))
989 spin_lock_irqsave(&p->p_work_lock, flags);
990 while (que->cq_cons_idx != prod_idx) {
991 cqe = &que->cq[que->cq_cons_idx];
993 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
994 "cqe=%p prod_idx=%d cons_idx=%d.\n",
995 cqe, prod_idx, que->cq_cons_idx);
997 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1002 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1003 que->cq_cons_idx = 0;
1005 wake_up_process(p->iothread);
1006 spin_unlock_irqrestore(&p->p_work_lock, flags);
1011 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1013 struct qedi_ctx *qedi = fp->qedi;
1014 struct global_queue *que;
1015 struct qed_sb_info *sb_info = fp->sb_info;
1016 struct status_block *sb = sb_info->sb_virt;
1021 /* Get the current firmware producer index */
1022 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1024 /* Get the pointer to the global CQ this completion is on */
1025 que = qedi->global_queues[fp->sb_id];
1027 /* prod idx wrap around uint16 */
1028 if (prod_idx >= QEDI_CQ_SIZE)
1029 prod_idx = prod_idx % QEDI_CQ_SIZE;
1031 return (que->cq_cons_idx != prod_idx);
1034 /* MSI-X fastpath handler code */
1035 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1037 struct qedi_fastpath *fp = dev_id;
1038 struct qedi_ctx *qedi = fp->qedi;
1039 bool wake_io_thread = true;
1041 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1044 wake_io_thread = qedi_process_completions(fp);
1045 if (wake_io_thread) {
1046 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1047 "process already running\n");
1050 if (qedi_fp_has_work(fp) == 0)
1051 qed_sb_update_sb_idx(fp->sb_info);
1053 /* Check for more work */
1056 if (qedi_fp_has_work(fp) == 0)
1057 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1064 /* simd handler for MSI/INTa */
1065 static void qedi_simd_int_handler(void *cookie)
1067 /* Cookie is qedi_ctx struct */
1068 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1070 QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1073 #define QEDI_SIMD_HANDLER_NUM 0
1074 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1078 if (qedi->int_info.msix_cnt) {
1079 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1080 synchronize_irq(qedi->int_info.msix[i].vector);
1081 irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1083 free_irq(qedi->int_info.msix[i].vector,
1084 &qedi->fp_array[i]);
1087 qedi_ops->common->simd_handler_clean(qedi->cdev,
1088 QEDI_SIMD_HANDLER_NUM);
1091 qedi->int_info.used_cnt = 0;
1092 qedi_ops->common->set_fp_int(qedi->cdev, 0);
1095 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1099 cpu = cpumask_first(cpu_online_mask);
1100 for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1101 rc = request_irq(qedi->int_info.msix[i].vector,
1102 qedi_msix_handler, 0, "qedi",
1103 &qedi->fp_array[i]);
1106 QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1107 qedi_sync_free_irqs(qedi);
1110 qedi->int_info.used_cnt++;
1111 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1113 cpu = cpumask_next(cpu, cpu_online_mask);
1119 static int qedi_setup_int(struct qedi_ctx *qedi)
1123 rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1124 rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1126 goto exit_setup_int;
1128 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1129 "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1130 qedi->int_info.msix_cnt, num_online_cpus());
1132 if (qedi->int_info.msix_cnt) {
1133 rc = qedi_request_msix_irq(qedi);
1134 goto exit_setup_int;
1136 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1137 QEDI_SIMD_HANDLER_NUM,
1138 qedi_simd_int_handler);
1139 qedi->int_info.used_cnt = 1;
1146 static void qedi_free_bdq(struct qedi_ctx *qedi)
1150 if (qedi->bdq_pbl_list)
1151 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1152 qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1155 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1156 qedi->bdq_pbl, qedi->bdq_pbl_dma);
1158 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1159 if (qedi->bdq[i].buf_addr) {
1160 dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1161 qedi->bdq[i].buf_addr,
1162 qedi->bdq[i].buf_dma);
1167 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1170 struct global_queue **gl = qedi->global_queues;
1172 for (i = 0; i < qedi->num_queues; i++) {
1177 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1178 gl[i]->cq, gl[i]->cq_dma);
1180 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1181 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1185 qedi_free_bdq(qedi);
1188 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1191 struct scsi_bd *pbl;
1195 /* Alloc dma memory for BDQ buffers */
1196 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1197 qedi->bdq[i].buf_addr =
1198 dma_alloc_coherent(&qedi->pdev->dev,
1200 &qedi->bdq[i].buf_dma,
1202 if (!qedi->bdq[i].buf_addr) {
1203 QEDI_ERR(&qedi->dbg_ctx,
1204 "Could not allocate BDQ buffer %d.\n", i);
1209 /* Alloc dma memory for BDQ page buffer list */
1210 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1211 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1212 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1214 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1215 qedi->rq_num_entries);
1217 qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1218 qedi->bdq_pbl_mem_size,
1219 &qedi->bdq_pbl_dma, GFP_KERNEL);
1220 if (!qedi->bdq_pbl) {
1221 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1226 * Populate BDQ PBL with physical and virtual address of individual
1229 pbl = (struct scsi_bd *)qedi->bdq_pbl;
1230 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1232 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1234 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1235 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1236 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1237 pbl, pbl->address.hi, pbl->address.lo, i);
1239 pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
1243 /* Allocate list of PBL pages */
1244 qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1246 &qedi->bdq_pbl_list_dma,
1248 if (!qedi->bdq_pbl_list) {
1249 QEDI_ERR(&qedi->dbg_ctx,
1250 "Could not allocate list of PBL pages.\n");
1253 memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
1256 * Now populate PBL list with pages that contain pointers to the
1257 * individual buffers.
1259 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1260 list = (u64 *)qedi->bdq_pbl_list;
1261 page = qedi->bdq_pbl_list_dma;
1262 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1263 *list = qedi->bdq_pbl_dma;
1271 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1281 * Number of global queues (CQ / RQ). This should
1282 * be <= number of available MSIX vectors for the PF
1284 if (!qedi->num_queues) {
1285 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1289 /* Make sure we allocated the PBL that will contain the physical
1290 * addresses of our queues
1292 if (!qedi->p_cpuq) {
1294 goto mem_alloc_failure;
1297 qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1298 qedi->num_queues), GFP_KERNEL);
1299 if (!qedi->global_queues) {
1300 QEDI_ERR(&qedi->dbg_ctx,
1301 "Unable to allocate global queues array ptr memory\n");
1304 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1305 "qedi->global_queues=%p.\n", qedi->global_queues);
1307 /* Allocate DMA coherent buffers for BDQ */
1308 rc = qedi_alloc_bdq(qedi);
1310 goto mem_alloc_failure;
1312 /* Allocate a CQ and an associated PBL for each MSI-X
1315 for (i = 0; i < qedi->num_queues; i++) {
1316 qedi->global_queues[i] =
1317 kzalloc(sizeof(*qedi->global_queues[0]),
1319 if (!qedi->global_queues[i]) {
1320 QEDI_ERR(&qedi->dbg_ctx,
1321 "Unable to allocation global queue %d.\n", i);
1322 goto mem_alloc_failure;
1325 qedi->global_queues[i]->cq_mem_size =
1326 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1327 qedi->global_queues[i]->cq_mem_size =
1328 (qedi->global_queues[i]->cq_mem_size +
1329 (QEDI_PAGE_SIZE - 1));
1331 qedi->global_queues[i]->cq_pbl_size =
1332 (qedi->global_queues[i]->cq_mem_size /
1333 QEDI_PAGE_SIZE) * sizeof(void *);
1334 qedi->global_queues[i]->cq_pbl_size =
1335 (qedi->global_queues[i]->cq_pbl_size +
1336 (QEDI_PAGE_SIZE - 1));
1338 qedi->global_queues[i]->cq =
1339 dma_alloc_coherent(&qedi->pdev->dev,
1340 qedi->global_queues[i]->cq_mem_size,
1341 &qedi->global_queues[i]->cq_dma,
1344 if (!qedi->global_queues[i]->cq) {
1345 QEDI_WARN(&qedi->dbg_ctx,
1346 "Could not allocate cq.\n");
1348 goto mem_alloc_failure;
1350 memset(qedi->global_queues[i]->cq, 0,
1351 qedi->global_queues[i]->cq_mem_size);
1353 qedi->global_queues[i]->cq_pbl =
1354 dma_alloc_coherent(&qedi->pdev->dev,
1355 qedi->global_queues[i]->cq_pbl_size,
1356 &qedi->global_queues[i]->cq_pbl_dma,
1359 if (!qedi->global_queues[i]->cq_pbl) {
1360 QEDI_WARN(&qedi->dbg_ctx,
1361 "Could not allocate cq PBL.\n");
1363 goto mem_alloc_failure;
1365 memset(qedi->global_queues[i]->cq_pbl, 0,
1366 qedi->global_queues[i]->cq_pbl_size);
1369 num_pages = qedi->global_queues[i]->cq_mem_size /
1371 page = qedi->global_queues[i]->cq_dma;
1372 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1374 while (num_pages--) {
1377 *pbl = (u32)((u64)page >> 32);
1379 page += QEDI_PAGE_SIZE;
1383 list = (u32 *)qedi->p_cpuq;
1386 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1387 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
1388 * to the physical address which contains an array of pointers to the
1389 * physical addresses of the specific queue pages.
1391 for (i = 0; i < qedi->num_queues; i++) {
1392 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1394 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1399 *list = (u32)((u64)0 >> 32);
1406 qedi_free_global_queues(qedi);
1410 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1420 /* Calculate appropriate queue and PBL sizes */
1421 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1422 ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1424 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1425 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1427 ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1428 &ep->sq_dma, GFP_KERNEL);
1430 QEDI_WARN(&qedi->dbg_ctx,
1431 "Could not allocate send queue.\n");
1435 memset(ep->sq, 0, ep->sq_mem_size);
1437 ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1438 &ep->sq_pbl_dma, GFP_KERNEL);
1440 QEDI_WARN(&qedi->dbg_ctx,
1441 "Could not allocate send queue PBL.\n");
1445 memset(ep->sq_pbl, 0, ep->sq_pbl_size);
1448 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1450 pbl = (u32 *)ep->sq_pbl;
1452 while (num_pages--) {
1455 *pbl = (u32)((u64)page >> 32);
1457 page += QEDI_PAGE_SIZE;
1463 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1469 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1472 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1475 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1479 int qedi_get_task_idx(struct qedi_ctx *qedi)
1484 tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1485 MAX_ISCSI_TASK_ENTRIES);
1487 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1488 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1493 if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1500 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1502 if (!test_and_clear_bit(idx, qedi->task_idx_map))
1503 QEDI_ERR(&qedi->dbg_ctx,
1504 "FW task context, already cleared, tid=0x%x\n", idx);
1507 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1508 struct qedi_cmd *cmd)
1510 qedi->itt_map[tid].itt = proto_itt;
1511 qedi->itt_map[tid].p_cmd = cmd;
1513 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1514 "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1515 qedi->itt_map[tid].itt);
1518 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1522 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1523 if (qedi->itt_map[i].itt == itt) {
1525 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1526 "Ref itt=0x%x, found at tid=0x%x\n",
1535 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1537 *proto_itt = qedi->itt_map[tid].itt;
1538 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1539 "Get itt map tid [0x%x with proto itt[0x%x]",
1543 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1545 struct qedi_cmd *cmd = NULL;
1547 if (tid > MAX_ISCSI_TASK_ENTRIES)
1550 cmd = qedi->itt_map[tid].p_cmd;
1551 if (cmd->task_id != tid)
1554 qedi->itt_map[tid].p_cmd = NULL;
1559 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1561 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1562 sizeof(struct qedi_itt_map), GFP_KERNEL);
1563 if (!qedi->itt_map) {
1564 QEDI_ERR(&qedi->dbg_ctx,
1565 "Unable to allocate itt map array memory\n");
1571 static void qedi_free_itt(struct qedi_ctx *qedi)
1573 kfree(qedi->itt_map);
1576 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1577 .rx_cb = qedi_ll2_rx,
1581 static int qedi_percpu_io_thread(void *arg)
1583 struct qedi_percpu_s *p = arg;
1584 struct qedi_work *work, *tmp;
1585 unsigned long flags;
1586 LIST_HEAD(work_list);
1588 set_user_nice(current, -20);
1590 while (!kthread_should_stop()) {
1591 spin_lock_irqsave(&p->p_work_lock, flags);
1592 while (!list_empty(&p->work_list)) {
1593 list_splice_init(&p->work_list, &work_list);
1594 spin_unlock_irqrestore(&p->p_work_lock, flags);
1596 list_for_each_entry_safe(work, tmp, &work_list, list) {
1597 list_del_init(&work->list);
1598 qedi_fp_process_cqes(work);
1599 if (!work->is_solicited)
1603 spin_lock_irqsave(&p->p_work_lock, flags);
1605 set_current_state(TASK_INTERRUPTIBLE);
1606 spin_unlock_irqrestore(&p->p_work_lock, flags);
1609 __set_current_state(TASK_RUNNING);
1614 static int qedi_cpu_online(unsigned int cpu)
1616 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1617 struct task_struct *thread;
1619 thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1621 "qedi_thread/%d", cpu);
1623 return PTR_ERR(thread);
1625 kthread_bind(thread, cpu);
1626 p->iothread = thread;
1627 wake_up_process(thread);
1631 static int qedi_cpu_offline(unsigned int cpu)
1633 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1634 struct qedi_work *work, *tmp;
1635 struct task_struct *thread;
1637 spin_lock_bh(&p->p_work_lock);
1638 thread = p->iothread;
1641 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1642 list_del_init(&work->list);
1643 qedi_fp_process_cqes(work);
1644 if (!work->is_solicited)
1648 spin_unlock_bh(&p->p_work_lock);
1650 kthread_stop(thread);
1654 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1656 struct qed_ll2_params params;
1658 qedi_recover_all_conns(qedi);
1660 qedi_ops->ll2->stop(qedi->cdev);
1661 qedi_ll2_free_skbs(qedi);
1663 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1664 qedi->ll2_mtu, mtu);
1665 memset(¶ms, 0, sizeof(params));
1666 qedi->ll2_mtu = mtu;
1667 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1668 params.drop_ttl0_packets = 0;
1669 params.rx_vlan_stripping = 1;
1670 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1671 qedi_ops->ll2->start(qedi->cdev, ¶ms);
1674 static void __qedi_remove(struct pci_dev *pdev, int mode)
1676 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
1678 if (qedi->tmf_thread) {
1679 flush_workqueue(qedi->tmf_thread);
1680 destroy_workqueue(qedi->tmf_thread);
1681 qedi->tmf_thread = NULL;
1684 if (qedi->offload_thread) {
1685 flush_workqueue(qedi->offload_thread);
1686 destroy_workqueue(qedi->offload_thread);
1687 qedi->offload_thread = NULL;
1690 #ifdef CONFIG_DEBUG_FS
1691 qedi_dbg_host_exit(&qedi->dbg_ctx);
1693 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
1694 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1696 qedi_sync_free_irqs(qedi);
1698 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1699 qedi_ops->stop(qedi->cdev);
1700 qedi_ops->ll2->stop(qedi->cdev);
1703 if (mode == QEDI_MODE_NORMAL)
1704 qedi_free_iscsi_pf_param(qedi);
1706 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1707 qedi_ops->common->slowpath_stop(qedi->cdev);
1708 qedi_ops->common->remove(qedi->cdev);
1711 qedi_destroy_fp(qedi);
1713 if (mode == QEDI_MODE_NORMAL) {
1714 qedi_release_cid_que(qedi);
1715 qedi_cm_free_mem(qedi);
1716 qedi_free_uio(qedi->udev);
1717 qedi_free_itt(qedi);
1719 iscsi_host_remove(qedi->shost);
1720 iscsi_host_free(qedi->shost);
1722 if (qedi->ll2_recv_thread) {
1723 kthread_stop(qedi->ll2_recv_thread);
1724 qedi->ll2_recv_thread = NULL;
1726 qedi_ll2_free_skbs(qedi);
1730 static int __qedi_probe(struct pci_dev *pdev, int mode)
1732 struct qedi_ctx *qedi;
1733 struct qed_ll2_params params;
1738 struct qed_link_params link_params;
1739 struct qed_slowpath_params sp_params;
1740 struct qed_probe_params qed_params;
1741 void *task_start, *task_end;
1745 if (mode != QEDI_MODE_RECOVERY) {
1746 qedi = qedi_host_alloc(pdev);
1752 qedi = pci_get_drvdata(pdev);
1755 memset(&qed_params, 0, sizeof(qed_params));
1756 qed_params.protocol = QED_PROTOCOL_ISCSI;
1757 qed_params.dp_module = dp_module;
1758 qed_params.dp_level = dp_level;
1759 qed_params.is_vf = is_vf;
1760 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
1763 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
1767 qedi->msix_count = MAX_NUM_MSIX_PF;
1768 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1770 if (mode != QEDI_MODE_RECOVERY) {
1771 rc = qedi_set_iscsi_pf_param(qedi);
1774 QEDI_ERR(&qedi->dbg_ctx,
1775 "Set iSCSI pf param fail\n");
1780 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1782 rc = qedi_prepare_fp(qedi);
1784 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
1785 goto free_pf_params;
1788 /* Start the Slowpath-process */
1789 memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
1790 sp_params.int_mode = QED_INT_MODE_MSIX;
1791 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
1792 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
1793 sp_params.drv_rev = QEDI_DRIVER_REV_VER;
1794 sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
1795 strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
1796 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
1798 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
1802 /* update_pf_params needs to be called before and after slowpath
1805 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1807 rc = qedi_setup_int(qedi);
1809 goto stop_iscsi_func;
1811 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1813 /* Learn information crucial for qedi to progress */
1814 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
1816 goto stop_iscsi_func;
1818 /* Record BDQ producer doorbell addresses */
1819 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
1820 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
1821 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1822 "BDQ primary_prod=%p secondary_prod=%p.\n",
1823 qedi->bdq_primary_prod,
1824 qedi->bdq_secondary_prod);
1827 * We need to write the number of BDs in the BDQ we've preallocated so
1828 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
1831 qedi->bdq_prod_idx = QEDI_BDQ_NUM;
1832 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1833 "Writing %d to primary and secondary BDQ doorbell registers.\n",
1834 qedi->bdq_prod_idx);
1835 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
1836 tmp = readw(qedi->bdq_primary_prod);
1837 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
1838 tmp = readw(qedi->bdq_secondary_prod);
1840 ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
1841 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
1844 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1845 qedi_ops->common->set_id(qedi->cdev, host_buf, QEDI_MODULE_VERSION);
1847 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
1849 memset(¶ms, 0, sizeof(params));
1850 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
1851 qedi->ll2_mtu = DEF_PATH_MTU;
1852 params.drop_ttl0_packets = 0;
1853 params.rx_vlan_stripping = 1;
1854 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1856 if (mode != QEDI_MODE_RECOVERY) {
1857 /* set up rx path */
1858 INIT_LIST_HEAD(&qedi->ll2_skb_list);
1859 spin_lock_init(&qedi->ll2_lock);
1860 /* start qedi context */
1861 spin_lock_init(&qedi->hba_lock);
1862 spin_lock_init(&qedi->task_idx_lock);
1864 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
1865 qedi_ops->ll2->start(qedi->cdev, ¶ms);
1867 if (mode != QEDI_MODE_RECOVERY) {
1868 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
1873 rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
1874 qedi, qedi_iscsi_event_cb);
1877 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
1881 task_start = qedi_get_task_mem(&qedi->tasks, 0);
1882 task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
1883 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1884 "Task context start=%p, end=%p block_size=%u.\n",
1885 task_start, task_end, qedi->tasks.size);
1887 memset(&link_params, 0, sizeof(link_params));
1888 link_params.link_up = true;
1889 rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
1891 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
1892 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1895 #ifdef CONFIG_DEBUG_FS
1896 qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
1899 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1900 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
1901 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
1902 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
1904 if (mode == QEDI_MODE_NORMAL) {
1905 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
1906 QEDI_ERR(&qedi->dbg_ctx,
1907 "Could not add iscsi host\n");
1912 /* Allocate uio buffers */
1913 rc = qedi_alloc_uio_rings(qedi);
1915 QEDI_ERR(&qedi->dbg_ctx,
1916 "UIO alloc ring failed err=%d\n", rc);
1920 rc = qedi_init_uio(qedi);
1922 QEDI_ERR(&qedi->dbg_ctx,
1923 "UIO init failed, err=%d\n", rc);
1927 /* host the array on iscsi_conn */
1928 rc = qedi_setup_cid_que(qedi);
1930 QEDI_ERR(&qedi->dbg_ctx,
1931 "Could not setup cid que\n");
1935 rc = qedi_cm_alloc_mem(qedi);
1937 QEDI_ERR(&qedi->dbg_ctx,
1938 "Could not alloc cm memory\n");
1942 rc = qedi_alloc_itt(qedi);
1944 QEDI_ERR(&qedi->dbg_ctx,
1945 "Could not alloc itt memory\n");
1949 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1950 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
1951 if (!qedi->tmf_thread) {
1952 QEDI_ERR(&qedi->dbg_ctx,
1953 "Unable to start tmf thread!\n");
1958 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
1959 qedi->offload_thread = create_workqueue(host_buf);
1960 if (!qedi->offload_thread) {
1961 QEDI_ERR(&qedi->dbg_ctx,
1962 "Unable to start offload thread!\n");
1967 /* F/w needs 1st task context memory entry for performance */
1968 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
1969 atomic_set(&qedi->num_offloads, 0);
1975 qedi_release_cid_que(qedi);
1977 qedi_free_uio(qedi->udev);
1979 #ifdef CONFIG_DEBUG_FS
1980 qedi_dbg_host_exit(&qedi->dbg_ctx);
1982 iscsi_host_remove(qedi->shost);
1984 qedi_ops->stop(qedi->cdev);
1986 qedi_ops->common->slowpath_stop(qedi->cdev);
1988 qedi_ops->common->remove(qedi->cdev);
1990 qedi_free_iscsi_pf_param(qedi);
1992 iscsi_host_free(qedi->shost);
1997 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1999 return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2002 static void qedi_remove(struct pci_dev *pdev)
2004 __qedi_remove(pdev, QEDI_MODE_NORMAL);
2007 static struct pci_device_id qedi_pci_tbl[] = {
2008 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2009 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2012 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2014 static enum cpuhp_state qedi_cpuhp_state;
2016 static struct pci_driver qedi_pci_driver = {
2017 .name = QEDI_MODULE_NAME,
2018 .id_table = qedi_pci_tbl,
2019 .probe = qedi_probe,
2020 .remove = qedi_remove,
2023 static int __init qedi_init(void)
2025 struct qedi_percpu_s *p;
2028 qedi_ops = qed_get_iscsi_ops();
2030 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2034 #ifdef CONFIG_DEBUG_FS
2035 qedi_dbg_init("qedi");
2038 qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2039 if (!qedi_scsi_transport) {
2040 QEDI_ERR(NULL, "Could not register qedi transport");
2042 goto exit_qedi_init_1;
2045 for_each_possible_cpu(cpu) {
2046 p = &per_cpu(qedi_percpu, cpu);
2047 INIT_LIST_HEAD(&p->work_list);
2048 spin_lock_init(&p->p_work_lock);
2052 rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2053 qedi_cpu_online, qedi_cpu_offline);
2055 goto exit_qedi_init_2;
2056 qedi_cpuhp_state = rc;
2058 rc = pci_register_driver(&qedi_pci_driver);
2060 QEDI_ERR(NULL, "Failed to register driver\n");
2067 cpuhp_remove_state(qedi_cpuhp_state);
2069 iscsi_unregister_transport(&qedi_iscsi_transport);
2071 #ifdef CONFIG_DEBUG_FS
2074 qed_put_iscsi_ops();
2078 static void __exit qedi_cleanup(void)
2080 pci_unregister_driver(&qedi_pci_driver);
2081 cpuhp_remove_state(qedi_cpuhp_state);
2082 iscsi_unregister_transport(&qedi_iscsi_transport);
2084 #ifdef CONFIG_DEBUG_FS
2087 qed_put_iscsi_ops();
2090 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2091 MODULE_LICENSE("GPL");
2092 MODULE_AUTHOR("QLogic Corporation");
2093 MODULE_VERSION(QEDI_MODULE_VERSION);
2094 module_init(qedi_init);
2095 module_exit(qedi_cleanup);