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)
154 if (udev->ll2_ring) {
155 free_page((unsigned long)udev->ll2_ring);
156 udev->ll2_ring = NULL;
160 free_pages((unsigned long)udev->ll2_buf, 2);
161 udev->ll2_buf = NULL;
165 static void __qedi_free_uio(struct qedi_uio_dev *udev)
167 uio_unregister_device(&udev->qedi_uinfo);
169 __qedi_free_uio_rings(udev);
171 pci_dev_put(udev->pdev);
176 static void qedi_free_uio(struct qedi_uio_dev *udev)
181 list_del_init(&udev->list);
182 __qedi_free_uio(udev);
185 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
187 struct qedi_ctx *qedi = NULL;
188 struct qedi_uio_ctrl *uctrl = NULL;
193 spin_lock_bh(&qedi->ll2_lock);
194 uctrl->host_rx_cons = 0;
195 uctrl->hw_rx_prod = 0;
196 uctrl->hw_rx_bd_prod = 0;
197 uctrl->host_rx_bd_cons = 0;
199 memset(udev->ll2_ring, 0, udev->ll2_ring_size);
200 memset(udev->ll2_buf, 0, udev->ll2_buf_size);
201 spin_unlock_bh(&qedi->ll2_lock);
204 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
208 if (udev->ll2_ring || udev->ll2_buf)
211 /* Allocating memory for LL2 ring */
212 udev->ll2_ring_size = QEDI_PAGE_SIZE;
213 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
214 if (!udev->ll2_ring) {
216 goto exit_alloc_ring;
219 /* Allocating memory for Tx/Rx pkt buffer */
220 udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
221 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
222 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
224 if (!udev->ll2_buf) {
231 free_page((unsigned long)udev->ll2_ring);
232 udev->ll2_ring = NULL;
237 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
239 struct qedi_uio_dev *udev = NULL;
240 struct qedi_uio_ctrl *uctrl = NULL;
243 list_for_each_entry(udev, &qedi_udev_list, list) {
244 if (udev->pdev == qedi->pdev) {
246 if (__qedi_alloc_uio_rings(udev)) {
255 udev = kzalloc(sizeof(*udev), GFP_KERNEL);
261 uctrl = kzalloc(sizeof(*uctrl), GFP_KERNEL);
270 udev->pdev = qedi->pdev;
273 rc = __qedi_alloc_uio_rings(udev);
277 list_add(&udev->list, &qedi_udev_list);
279 pci_dev_get(udev->pdev);
282 udev->tx_pkt = udev->ll2_buf;
283 udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
294 static int qedi_init_uio(struct qedi_ctx *qedi)
296 struct qedi_uio_dev *udev = qedi->udev;
297 struct uio_info *uinfo;
303 uinfo = &udev->qedi_uinfo;
305 uinfo->mem[0].addr = (unsigned long)udev->uctrl;
306 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
307 uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
309 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
310 uinfo->mem[1].size = udev->ll2_ring_size;
311 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
313 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
314 uinfo->mem[2].size = udev->ll2_buf_size;
315 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
317 uinfo->name = "qedi_uio";
318 uinfo->version = QEDI_MODULE_VERSION;
319 uinfo->irq = UIO_IRQ_CUSTOM;
321 uinfo->open = qedi_uio_open;
322 uinfo->release = qedi_uio_close;
324 if (udev->uio_dev == -1) {
328 ret = uio_register_device(&udev->pdev->dev, uinfo);
330 QEDI_ERR(&qedi->dbg_ctx,
331 "UIO registration failed\n");
339 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
340 struct qed_sb_info *sb_info, u16 sb_id)
342 struct status_block *sb_virt;
346 sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
347 sizeof(struct status_block), &sb_phys,
350 QEDI_ERR(&qedi->dbg_ctx,
351 "Status block allocation failed for id = %d.\n",
356 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
357 sb_id, QED_SB_TYPE_STORAGE);
359 QEDI_ERR(&qedi->dbg_ctx,
360 "Status block initialization failed for id = %d.\n",
368 static void qedi_free_sb(struct qedi_ctx *qedi)
370 struct qed_sb_info *sb_info;
373 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
374 sb_info = &qedi->sb_array[id];
375 if (sb_info->sb_virt)
376 dma_free_coherent(&qedi->pdev->dev,
377 sizeof(*sb_info->sb_virt),
378 (void *)sb_info->sb_virt,
383 static void qedi_free_fp(struct qedi_ctx *qedi)
385 kfree(qedi->fp_array);
386 kfree(qedi->sb_array);
389 static void qedi_destroy_fp(struct qedi_ctx *qedi)
395 static int qedi_alloc_fp(struct qedi_ctx *qedi)
399 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
400 sizeof(struct qedi_fastpath), GFP_KERNEL);
401 if (!qedi->fp_array) {
402 QEDI_ERR(&qedi->dbg_ctx,
403 "fastpath fp array allocation failed.\n");
407 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
408 sizeof(struct qed_sb_info), GFP_KERNEL);
409 if (!qedi->sb_array) {
410 QEDI_ERR(&qedi->dbg_ctx,
411 "fastpath sb array allocation failed.\n");
423 static void qedi_int_fp(struct qedi_ctx *qedi)
425 struct qedi_fastpath *fp;
428 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
429 sizeof(*qedi->fp_array));
430 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
431 sizeof(*qedi->sb_array));
433 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
434 fp = &qedi->fp_array[id];
435 fp->sb_info = &qedi->sb_array[id];
438 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
441 /* fp_array[i] ---- irq cookie
442 * So init data which is needed in int ctx
447 static int qedi_prepare_fp(struct qedi_ctx *qedi)
449 struct qedi_fastpath *fp;
452 ret = qedi_alloc_fp(qedi);
458 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
459 fp = &qedi->fp_array[id];
460 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
462 QEDI_ERR(&qedi->dbg_ctx,
463 "SB allocation and initialization failed.\n");
478 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
482 qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
483 sizeof(u32), GFP_KERNEL);
484 if (!qedi->cid_que.cid_que_base)
487 qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
488 sizeof(struct qedi_conn *),
490 if (!qedi->cid_que.conn_cid_tbl) {
491 kfree(qedi->cid_que.cid_que_base);
492 qedi->cid_que.cid_que_base = NULL;
496 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
497 qedi->cid_que.cid_q_prod_idx = 0;
498 qedi->cid_que.cid_q_cons_idx = 0;
499 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
500 qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
502 for (i = 0; i < qedi->max_active_conns; i++) {
503 qedi->cid_que.cid_que[i] = i;
504 qedi->cid_que.conn_cid_tbl[i] = NULL;
510 static void qedi_release_cid_que(struct qedi_ctx *qedi)
512 kfree(qedi->cid_que.cid_que_base);
513 qedi->cid_que.cid_que_base = NULL;
515 kfree(qedi->cid_que.conn_cid_tbl);
516 qedi->cid_que.conn_cid_tbl = NULL;
519 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
520 u16 start_id, u16 next)
522 id_tbl->start = start_id;
525 spin_lock_init(&id_tbl->lock);
526 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
533 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
535 kfree(id_tbl->table);
536 id_tbl->table = NULL;
539 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
544 if (id >= id_tbl->max)
547 spin_lock(&id_tbl->lock);
548 if (!test_bit(id, id_tbl->table)) {
549 set_bit(id, id_tbl->table);
552 spin_unlock(&id_tbl->lock);
556 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
560 spin_lock(&id_tbl->lock);
561 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
562 if (id >= id_tbl->max) {
563 id = QEDI_LOCAL_PORT_INVALID;
564 if (id_tbl->next != 0) {
565 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
566 if (id >= id_tbl->next)
567 id = QEDI_LOCAL_PORT_INVALID;
571 if (id < id_tbl->max) {
572 set_bit(id, id_tbl->table);
573 id_tbl->next = (id + 1) & (id_tbl->max - 1);
577 spin_unlock(&id_tbl->lock);
582 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
584 if (id == QEDI_LOCAL_PORT_INVALID)
588 if (id >= id_tbl->max)
591 clear_bit(id, id_tbl->table);
594 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
598 qedi_free_id_tbl(&qedi->lcl_port_tbl);
601 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
605 qedi->ep_tbl = kzalloc((qedi->max_active_conns *
606 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
609 port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
610 if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
611 QEDI_LOCAL_PORT_MIN, port_id)) {
612 qedi_cm_free_mem(qedi);
619 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
621 struct Scsi_Host *shost;
622 struct qedi_ctx *qedi = NULL;
624 shost = iscsi_host_alloc(&qedi_host_template,
625 sizeof(struct qedi_ctx), 0);
627 QEDI_ERR(NULL, "Could not allocate shost\n");
628 goto exit_setup_shost;
631 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
632 shost->max_channel = 0;
634 shost->max_cmd_len = 16;
635 shost->transportt = qedi_scsi_transport;
637 qedi = iscsi_host_priv(shost);
638 memset(qedi, 0, sizeof(*qedi));
640 qedi->dbg_ctx.host_no = shost->host_no;
642 qedi->dbg_ctx.pdev = pdev;
643 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
644 qedi->max_sqes = QEDI_SQ_SIZE;
646 if (shost_use_blk_mq(shost))
647 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
649 pci_set_drvdata(pdev, qedi);
655 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
657 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
658 struct qedi_uio_dev *udev;
659 struct qedi_uio_ctrl *uctrl;
660 struct skb_work_list *work;
664 QEDI_ERR(NULL, "qedi is NULL\n");
668 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
669 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
670 "UIO DEV is not opened\n");
678 work = kzalloc(sizeof(*work), GFP_ATOMIC);
680 QEDI_WARN(&qedi->dbg_ctx,
681 "Could not allocate work so dropping frame.\n");
686 INIT_LIST_HEAD(&work->list);
689 if (skb_vlan_tag_present(skb))
690 work->vlan_id = skb_vlan_tag_get(skb);
693 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
695 spin_lock_bh(&qedi->ll2_lock);
696 list_add_tail(&work->list, &qedi->ll2_skb_list);
698 ++uctrl->hw_rx_prod_cnt;
699 prod = (uctrl->hw_rx_prod + 1) % RX_RING;
700 if (prod != uctrl->host_rx_cons) {
701 uctrl->hw_rx_prod = prod;
702 spin_unlock_bh(&qedi->ll2_lock);
703 wake_up_process(qedi->ll2_recv_thread);
707 spin_unlock_bh(&qedi->ll2_lock);
711 /* map this skb to iscsiuio mmaped region */
712 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
715 struct qedi_uio_dev *udev = NULL;
716 struct qedi_uio_ctrl *uctrl = NULL;
717 struct qedi_rx_bd rxbd;
718 struct qedi_rx_bd *p_rxbd;
724 QEDI_ERR(NULL, "qedi is NULL\n");
730 pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
731 len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
732 memcpy(pkt, skb->data, len);
734 memset(&rxbd, 0, sizeof(rxbd));
735 rxbd.rx_pkt_index = uctrl->hw_rx_prod;
736 rxbd.rx_pkt_len = len;
737 rxbd.vlan_id = vlan_id;
739 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
740 rx_bd_prod = uctrl->hw_rx_bd_prod;
741 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
742 p_rxbd += rx_bd_prod;
744 memcpy(p_rxbd, &rxbd, sizeof(rxbd));
746 /* notify the iscsiuio about new packet */
747 uio_event_notify(&udev->qedi_uinfo);
752 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
754 struct skb_work_list *work, *work_tmp;
756 spin_lock_bh(&qedi->ll2_lock);
757 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
758 list_del(&work->list);
760 kfree_skb(work->skb);
763 spin_unlock_bh(&qedi->ll2_lock);
766 static int qedi_ll2_recv_thread(void *arg)
768 struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
769 struct skb_work_list *work, *work_tmp;
771 set_user_nice(current, -20);
773 while (!kthread_should_stop()) {
774 spin_lock_bh(&qedi->ll2_lock);
775 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
777 list_del(&work->list);
778 qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
779 kfree_skb(work->skb);
782 set_current_state(TASK_INTERRUPTIBLE);
783 spin_unlock_bh(&qedi->ll2_lock);
787 __set_current_state(TASK_RUNNING);
791 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
797 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "Min number of MSIX %d\n",
798 MIN_NUM_CPUS_MSIX(qedi));
800 num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
802 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
804 memset(&qedi->pf_params.iscsi_pf_params, 0,
805 sizeof(qedi->pf_params.iscsi_pf_params));
807 qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
808 qedi->num_queues * sizeof(struct qedi_glbl_q_params),
811 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
816 rval = qedi_alloc_global_queues(qedi);
818 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
823 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
824 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
825 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
826 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
827 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
828 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
829 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
830 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
832 for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
833 if ((1 << log_page_size) == PAGE_SIZE)
836 qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
838 qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
839 (u64)qedi->hw_p_cpuq;
841 /* RQ BDQ initializations.
842 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
843 * rqe_log_size: 8 for 256B RQE
845 qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
846 /* BDQ address and size */
847 qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
848 qedi->bdq_pbl_list_dma;
849 qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
850 qedi->bdq_pbl_list_num_entries;
851 qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
853 /* cq_num_entries: num_tasks + rq_num_entries */
854 qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
856 qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
857 qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
858 qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
864 /* Free DMA coherent memory for array of queue pointers we pass to qed */
865 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
870 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
871 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
875 qedi_free_global_queues(qedi);
877 kfree(qedi->global_queues);
880 static void qedi_link_update(void *dev, struct qed_link_output *link)
882 struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
885 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
886 atomic_set(&qedi->link_state, QEDI_LINK_UP);
888 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
889 "Link Down event.\n");
890 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
894 static struct qed_iscsi_cb_ops qedi_cb_ops = {
896 .link_update = qedi_link_update,
900 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
901 u16 que_idx, struct qedi_percpu_s *p)
903 struct qedi_work *qedi_work;
904 struct qedi_conn *q_conn;
905 struct iscsi_conn *conn;
906 struct qedi_cmd *qedi_cmd;
910 iscsi_cid = cqe->cqe_common.conn_id;
911 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
913 QEDI_WARN(&qedi->dbg_ctx,
914 "Session no longer exists for cid=0x%x!!\n",
918 conn = q_conn->cls_conn->dd_data;
920 switch (cqe->cqe_common.cqe_type) {
921 case ISCSI_CQE_TYPE_SOLICITED:
922 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
923 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
928 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
929 qedi_cmd->cqe_work.qedi = qedi;
930 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
931 qedi_cmd->cqe_work.que_idx = que_idx;
932 qedi_cmd->cqe_work.is_solicited = true;
933 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
935 case ISCSI_CQE_TYPE_UNSOLICITED:
936 case ISCSI_CQE_TYPE_DUMMY:
937 case ISCSI_CQE_TYPE_TASK_CLEANUP:
938 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
943 INIT_LIST_HEAD(&qedi_work->list);
944 qedi_work->qedi = qedi;
945 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
946 qedi_work->que_idx = que_idx;
947 qedi_work->is_solicited = false;
948 list_add_tail(&qedi_work->list, &p->work_list);
952 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
957 static bool qedi_process_completions(struct qedi_fastpath *fp)
959 struct qedi_ctx *qedi = fp->qedi;
960 struct qed_sb_info *sb_info = fp->sb_info;
961 struct status_block *sb = sb_info->sb_virt;
962 struct qedi_percpu_s *p = NULL;
963 struct global_queue *que;
966 union iscsi_cqe *cqe;
970 /* Get the current firmware producer index */
971 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
973 if (prod_idx >= QEDI_CQ_SIZE)
974 prod_idx = prod_idx % QEDI_CQ_SIZE;
976 que = qedi->global_queues[fp->sb_id];
977 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
978 "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
979 que, prod_idx, que->cq_cons_idx, fp->sb_id);
981 qedi->intr_cpu = fp->sb_id;
982 cpu = smp_processor_id();
983 p = &per_cpu(qedi_percpu, cpu);
985 if (unlikely(!p->iothread))
988 spin_lock_irqsave(&p->p_work_lock, flags);
989 while (que->cq_cons_idx != prod_idx) {
990 cqe = &que->cq[que->cq_cons_idx];
992 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
993 "cqe=%p prod_idx=%d cons_idx=%d.\n",
994 cqe, prod_idx, que->cq_cons_idx);
996 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1001 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1002 que->cq_cons_idx = 0;
1004 wake_up_process(p->iothread);
1005 spin_unlock_irqrestore(&p->p_work_lock, flags);
1010 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1012 struct qedi_ctx *qedi = fp->qedi;
1013 struct global_queue *que;
1014 struct qed_sb_info *sb_info = fp->sb_info;
1015 struct status_block *sb = sb_info->sb_virt;
1020 /* Get the current firmware producer index */
1021 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1023 /* Get the pointer to the global CQ this completion is on */
1024 que = qedi->global_queues[fp->sb_id];
1026 /* prod idx wrap around uint16 */
1027 if (prod_idx >= QEDI_CQ_SIZE)
1028 prod_idx = prod_idx % QEDI_CQ_SIZE;
1030 return (que->cq_cons_idx != prod_idx);
1033 /* MSI-X fastpath handler code */
1034 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1036 struct qedi_fastpath *fp = dev_id;
1037 struct qedi_ctx *qedi = fp->qedi;
1038 bool wake_io_thread = true;
1040 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1043 wake_io_thread = qedi_process_completions(fp);
1044 if (wake_io_thread) {
1045 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1046 "process already running\n");
1049 if (qedi_fp_has_work(fp) == 0)
1050 qed_sb_update_sb_idx(fp->sb_info);
1052 /* Check for more work */
1055 if (qedi_fp_has_work(fp) == 0)
1056 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1063 /* simd handler for MSI/INTa */
1064 static void qedi_simd_int_handler(void *cookie)
1066 /* Cookie is qedi_ctx struct */
1067 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1069 QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1072 #define QEDI_SIMD_HANDLER_NUM 0
1073 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1077 if (qedi->int_info.msix_cnt) {
1078 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1079 synchronize_irq(qedi->int_info.msix[i].vector);
1080 irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1082 free_irq(qedi->int_info.msix[i].vector,
1083 &qedi->fp_array[i]);
1086 qedi_ops->common->simd_handler_clean(qedi->cdev,
1087 QEDI_SIMD_HANDLER_NUM);
1090 qedi->int_info.used_cnt = 0;
1091 qedi_ops->common->set_fp_int(qedi->cdev, 0);
1094 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1098 cpu = cpumask_first(cpu_online_mask);
1099 for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1100 rc = request_irq(qedi->int_info.msix[i].vector,
1101 qedi_msix_handler, 0, "qedi",
1102 &qedi->fp_array[i]);
1105 QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1106 qedi_sync_free_irqs(qedi);
1109 qedi->int_info.used_cnt++;
1110 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1112 cpu = cpumask_next(cpu, cpu_online_mask);
1118 static int qedi_setup_int(struct qedi_ctx *qedi)
1122 rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1123 rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1125 goto exit_setup_int;
1127 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1128 "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1129 qedi->int_info.msix_cnt, num_online_cpus());
1131 if (qedi->int_info.msix_cnt) {
1132 rc = qedi_request_msix_irq(qedi);
1133 goto exit_setup_int;
1135 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1136 QEDI_SIMD_HANDLER_NUM,
1137 qedi_simd_int_handler);
1138 qedi->int_info.used_cnt = 1;
1145 static void qedi_free_bdq(struct qedi_ctx *qedi)
1149 if (qedi->bdq_pbl_list)
1150 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1151 qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1154 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1155 qedi->bdq_pbl, qedi->bdq_pbl_dma);
1157 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1158 if (qedi->bdq[i].buf_addr) {
1159 dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1160 qedi->bdq[i].buf_addr,
1161 qedi->bdq[i].buf_dma);
1166 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1169 struct global_queue **gl = qedi->global_queues;
1171 for (i = 0; i < qedi->num_queues; i++) {
1176 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1177 gl[i]->cq, gl[i]->cq_dma);
1179 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1180 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1184 qedi_free_bdq(qedi);
1187 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1190 struct scsi_bd *pbl;
1194 /* Alloc dma memory for BDQ buffers */
1195 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1196 qedi->bdq[i].buf_addr =
1197 dma_alloc_coherent(&qedi->pdev->dev,
1199 &qedi->bdq[i].buf_dma,
1201 if (!qedi->bdq[i].buf_addr) {
1202 QEDI_ERR(&qedi->dbg_ctx,
1203 "Could not allocate BDQ buffer %d.\n", i);
1208 /* Alloc dma memory for BDQ page buffer list */
1209 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1210 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1211 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1213 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1214 qedi->rq_num_entries);
1216 qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1217 qedi->bdq_pbl_mem_size,
1218 &qedi->bdq_pbl_dma, GFP_KERNEL);
1219 if (!qedi->bdq_pbl) {
1220 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1225 * Populate BDQ PBL with physical and virtual address of individual
1228 pbl = (struct scsi_bd *)qedi->bdq_pbl;
1229 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1231 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1233 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1234 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1235 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1236 pbl, pbl->address.hi, pbl->address.lo, i);
1238 pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
1242 /* Allocate list of PBL pages */
1243 qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1245 &qedi->bdq_pbl_list_dma,
1247 if (!qedi->bdq_pbl_list) {
1248 QEDI_ERR(&qedi->dbg_ctx,
1249 "Could not allocate list of PBL pages.\n");
1252 memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
1255 * Now populate PBL list with pages that contain pointers to the
1256 * individual buffers.
1258 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1259 list = (u64 *)qedi->bdq_pbl_list;
1260 page = qedi->bdq_pbl_list_dma;
1261 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1262 *list = qedi->bdq_pbl_dma;
1270 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1280 * Number of global queues (CQ / RQ). This should
1281 * be <= number of available MSIX vectors for the PF
1283 if (!qedi->num_queues) {
1284 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1288 /* Make sure we allocated the PBL that will contain the physical
1289 * addresses of our queues
1291 if (!qedi->p_cpuq) {
1293 goto mem_alloc_failure;
1296 qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1297 qedi->num_queues), GFP_KERNEL);
1298 if (!qedi->global_queues) {
1299 QEDI_ERR(&qedi->dbg_ctx,
1300 "Unable to allocate global queues array ptr memory\n");
1303 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1304 "qedi->global_queues=%p.\n", qedi->global_queues);
1306 /* Allocate DMA coherent buffers for BDQ */
1307 rc = qedi_alloc_bdq(qedi);
1309 goto mem_alloc_failure;
1311 /* Allocate a CQ and an associated PBL for each MSI-X
1314 for (i = 0; i < qedi->num_queues; i++) {
1315 qedi->global_queues[i] =
1316 kzalloc(sizeof(*qedi->global_queues[0]),
1318 if (!qedi->global_queues[i]) {
1319 QEDI_ERR(&qedi->dbg_ctx,
1320 "Unable to allocation global queue %d.\n", i);
1321 goto mem_alloc_failure;
1324 qedi->global_queues[i]->cq_mem_size =
1325 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1326 qedi->global_queues[i]->cq_mem_size =
1327 (qedi->global_queues[i]->cq_mem_size +
1328 (QEDI_PAGE_SIZE - 1));
1330 qedi->global_queues[i]->cq_pbl_size =
1331 (qedi->global_queues[i]->cq_mem_size /
1332 QEDI_PAGE_SIZE) * sizeof(void *);
1333 qedi->global_queues[i]->cq_pbl_size =
1334 (qedi->global_queues[i]->cq_pbl_size +
1335 (QEDI_PAGE_SIZE - 1));
1337 qedi->global_queues[i]->cq =
1338 dma_alloc_coherent(&qedi->pdev->dev,
1339 qedi->global_queues[i]->cq_mem_size,
1340 &qedi->global_queues[i]->cq_dma,
1343 if (!qedi->global_queues[i]->cq) {
1344 QEDI_WARN(&qedi->dbg_ctx,
1345 "Could not allocate cq.\n");
1347 goto mem_alloc_failure;
1349 memset(qedi->global_queues[i]->cq, 0,
1350 qedi->global_queues[i]->cq_mem_size);
1352 qedi->global_queues[i]->cq_pbl =
1353 dma_alloc_coherent(&qedi->pdev->dev,
1354 qedi->global_queues[i]->cq_pbl_size,
1355 &qedi->global_queues[i]->cq_pbl_dma,
1358 if (!qedi->global_queues[i]->cq_pbl) {
1359 QEDI_WARN(&qedi->dbg_ctx,
1360 "Could not allocate cq PBL.\n");
1362 goto mem_alloc_failure;
1364 memset(qedi->global_queues[i]->cq_pbl, 0,
1365 qedi->global_queues[i]->cq_pbl_size);
1368 num_pages = qedi->global_queues[i]->cq_mem_size /
1370 page = qedi->global_queues[i]->cq_dma;
1371 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1373 while (num_pages--) {
1376 *pbl = (u32)((u64)page >> 32);
1378 page += QEDI_PAGE_SIZE;
1382 list = (u32 *)qedi->p_cpuq;
1385 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1386 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
1387 * to the physical address which contains an array of pointers to the
1388 * physical addresses of the specific queue pages.
1390 for (i = 0; i < qedi->num_queues; i++) {
1391 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1393 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1398 *list = (u32)((u64)0 >> 32);
1405 qedi_free_global_queues(qedi);
1409 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1419 /* Calculate appropriate queue and PBL sizes */
1420 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1421 ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1423 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1424 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1426 ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1427 &ep->sq_dma, GFP_KERNEL);
1429 QEDI_WARN(&qedi->dbg_ctx,
1430 "Could not allocate send queue.\n");
1434 memset(ep->sq, 0, ep->sq_mem_size);
1436 ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1437 &ep->sq_pbl_dma, GFP_KERNEL);
1439 QEDI_WARN(&qedi->dbg_ctx,
1440 "Could not allocate send queue PBL.\n");
1444 memset(ep->sq_pbl, 0, ep->sq_pbl_size);
1447 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1449 pbl = (u32 *)ep->sq_pbl;
1451 while (num_pages--) {
1454 *pbl = (u32)((u64)page >> 32);
1456 page += QEDI_PAGE_SIZE;
1462 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1468 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1471 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1474 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1478 int qedi_get_task_idx(struct qedi_ctx *qedi)
1483 tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1484 MAX_ISCSI_TASK_ENTRIES);
1486 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1487 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1492 if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1499 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1501 if (!test_and_clear_bit(idx, qedi->task_idx_map)) {
1502 QEDI_ERR(&qedi->dbg_ctx,
1503 "FW task context, already cleared, tid=0x%x\n", idx);
1508 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1509 struct qedi_cmd *cmd)
1511 qedi->itt_map[tid].itt = proto_itt;
1512 qedi->itt_map[tid].p_cmd = cmd;
1514 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1515 "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1516 qedi->itt_map[tid].itt);
1519 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1523 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1524 if (qedi->itt_map[i].itt == itt) {
1526 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1527 "Ref itt=0x%x, found at tid=0x%x\n",
1536 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1538 *proto_itt = qedi->itt_map[tid].itt;
1539 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1540 "Get itt map tid [0x%x with proto itt[0x%x]",
1544 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1546 struct qedi_cmd *cmd = NULL;
1548 if (tid > MAX_ISCSI_TASK_ENTRIES)
1551 cmd = qedi->itt_map[tid].p_cmd;
1552 if (cmd->task_id != tid)
1555 qedi->itt_map[tid].p_cmd = NULL;
1560 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1562 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1563 sizeof(struct qedi_itt_map), GFP_KERNEL);
1564 if (!qedi->itt_map) {
1565 QEDI_ERR(&qedi->dbg_ctx,
1566 "Unable to allocate itt map array memory\n");
1572 static void qedi_free_itt(struct qedi_ctx *qedi)
1574 kfree(qedi->itt_map);
1577 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1578 .rx_cb = qedi_ll2_rx,
1582 static int qedi_percpu_io_thread(void *arg)
1584 struct qedi_percpu_s *p = arg;
1585 struct qedi_work *work, *tmp;
1586 unsigned long flags;
1587 LIST_HEAD(work_list);
1589 set_user_nice(current, -20);
1591 while (!kthread_should_stop()) {
1592 spin_lock_irqsave(&p->p_work_lock, flags);
1593 while (!list_empty(&p->work_list)) {
1594 list_splice_init(&p->work_list, &work_list);
1595 spin_unlock_irqrestore(&p->p_work_lock, flags);
1597 list_for_each_entry_safe(work, tmp, &work_list, list) {
1598 list_del_init(&work->list);
1599 qedi_fp_process_cqes(work);
1600 if (!work->is_solicited)
1604 spin_lock_irqsave(&p->p_work_lock, flags);
1606 set_current_state(TASK_INTERRUPTIBLE);
1607 spin_unlock_irqrestore(&p->p_work_lock, flags);
1610 __set_current_state(TASK_RUNNING);
1615 static int qedi_cpu_online(unsigned int cpu)
1617 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1618 struct task_struct *thread;
1620 thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1622 "qedi_thread/%d", cpu);
1624 return PTR_ERR(thread);
1626 kthread_bind(thread, cpu);
1627 p->iothread = thread;
1628 wake_up_process(thread);
1632 static int qedi_cpu_offline(unsigned int cpu)
1634 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1635 struct qedi_work *work, *tmp;
1636 struct task_struct *thread;
1638 spin_lock_bh(&p->p_work_lock);
1639 thread = p->iothread;
1642 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1643 list_del_init(&work->list);
1644 qedi_fp_process_cqes(work);
1645 if (!work->is_solicited)
1649 spin_unlock_bh(&p->p_work_lock);
1651 kthread_stop(thread);
1655 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1657 struct qed_ll2_params params;
1659 qedi_recover_all_conns(qedi);
1661 qedi_ops->ll2->stop(qedi->cdev);
1662 qedi_ll2_free_skbs(qedi);
1664 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1665 qedi->ll2_mtu, mtu);
1666 memset(¶ms, 0, sizeof(params));
1667 qedi->ll2_mtu = mtu;
1668 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1669 params.drop_ttl0_packets = 0;
1670 params.rx_vlan_stripping = 1;
1671 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1672 qedi_ops->ll2->start(qedi->cdev, ¶ms);
1675 static void __qedi_remove(struct pci_dev *pdev, int mode)
1677 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
1679 if (qedi->tmf_thread) {
1680 flush_workqueue(qedi->tmf_thread);
1681 destroy_workqueue(qedi->tmf_thread);
1682 qedi->tmf_thread = NULL;
1685 if (qedi->offload_thread) {
1686 flush_workqueue(qedi->offload_thread);
1687 destroy_workqueue(qedi->offload_thread);
1688 qedi->offload_thread = NULL;
1691 #ifdef CONFIG_DEBUG_FS
1692 qedi_dbg_host_exit(&qedi->dbg_ctx);
1694 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
1695 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1697 qedi_sync_free_irqs(qedi);
1699 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1700 qedi_ops->stop(qedi->cdev);
1701 qedi_ops->ll2->stop(qedi->cdev);
1704 if (mode == QEDI_MODE_NORMAL)
1705 qedi_free_iscsi_pf_param(qedi);
1707 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
1708 qedi_ops->common->slowpath_stop(qedi->cdev);
1709 qedi_ops->common->remove(qedi->cdev);
1712 qedi_destroy_fp(qedi);
1714 if (mode == QEDI_MODE_NORMAL) {
1715 qedi_release_cid_que(qedi);
1716 qedi_cm_free_mem(qedi);
1717 qedi_free_uio(qedi->udev);
1718 qedi_free_itt(qedi);
1720 iscsi_host_remove(qedi->shost);
1721 iscsi_host_free(qedi->shost);
1723 if (qedi->ll2_recv_thread) {
1724 kthread_stop(qedi->ll2_recv_thread);
1725 qedi->ll2_recv_thread = NULL;
1727 qedi_ll2_free_skbs(qedi);
1731 static int __qedi_probe(struct pci_dev *pdev, int mode)
1733 struct qedi_ctx *qedi;
1734 struct qed_ll2_params params;
1739 struct qed_link_params link_params;
1740 struct qed_slowpath_params sp_params;
1741 struct qed_probe_params qed_params;
1742 void *task_start, *task_end;
1746 if (mode != QEDI_MODE_RECOVERY) {
1747 qedi = qedi_host_alloc(pdev);
1753 qedi = pci_get_drvdata(pdev);
1756 memset(&qed_params, 0, sizeof(qed_params));
1757 qed_params.protocol = QED_PROTOCOL_ISCSI;
1758 qed_params.dp_module = dp_module;
1759 qed_params.dp_level = dp_level;
1760 qed_params.is_vf = is_vf;
1761 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
1764 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
1768 qedi->msix_count = MAX_NUM_MSIX_PF;
1769 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1771 if (mode != QEDI_MODE_RECOVERY) {
1772 rc = qedi_set_iscsi_pf_param(qedi);
1775 QEDI_ERR(&qedi->dbg_ctx,
1776 "Set iSCSI pf param fail\n");
1781 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1783 rc = qedi_prepare_fp(qedi);
1785 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
1786 goto free_pf_params;
1789 /* Start the Slowpath-process */
1790 memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
1791 sp_params.int_mode = QED_INT_MODE_MSIX;
1792 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
1793 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
1794 sp_params.drv_rev = QEDI_DRIVER_REV_VER;
1795 sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
1796 strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
1797 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
1799 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
1803 /* update_pf_params needs to be called before and after slowpath
1806 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
1808 rc = qedi_setup_int(qedi);
1810 goto stop_iscsi_func;
1812 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
1814 /* Learn information crucial for qedi to progress */
1815 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
1817 goto stop_iscsi_func;
1819 /* Record BDQ producer doorbell addresses */
1820 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
1821 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
1822 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1823 "BDQ primary_prod=%p secondary_prod=%p.\n",
1824 qedi->bdq_primary_prod,
1825 qedi->bdq_secondary_prod);
1828 * We need to write the number of BDs in the BDQ we've preallocated so
1829 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
1832 qedi->bdq_prod_idx = QEDI_BDQ_NUM;
1833 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1834 "Writing %d to primary and secondary BDQ doorbell registers.\n",
1835 qedi->bdq_prod_idx);
1836 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
1837 tmp = readw(qedi->bdq_primary_prod);
1838 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
1839 tmp = readw(qedi->bdq_secondary_prod);
1841 ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
1842 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
1845 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1846 qedi_ops->common->set_id(qedi->cdev, host_buf, QEDI_MODULE_VERSION);
1848 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
1850 memset(¶ms, 0, sizeof(params));
1851 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
1852 qedi->ll2_mtu = DEF_PATH_MTU;
1853 params.drop_ttl0_packets = 0;
1854 params.rx_vlan_stripping = 1;
1855 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1857 if (mode != QEDI_MODE_RECOVERY) {
1858 /* set up rx path */
1859 INIT_LIST_HEAD(&qedi->ll2_skb_list);
1860 spin_lock_init(&qedi->ll2_lock);
1861 /* start qedi context */
1862 spin_lock_init(&qedi->hba_lock);
1863 spin_lock_init(&qedi->task_idx_lock);
1865 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
1866 qedi_ops->ll2->start(qedi->cdev, ¶ms);
1868 if (mode != QEDI_MODE_RECOVERY) {
1869 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
1874 rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
1875 qedi, qedi_iscsi_event_cb);
1878 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
1882 task_start = qedi_get_task_mem(&qedi->tasks, 0);
1883 task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
1884 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1885 "Task context start=%p, end=%p block_size=%u.\n",
1886 task_start, task_end, qedi->tasks.size);
1888 memset(&link_params, 0, sizeof(link_params));
1889 link_params.link_up = true;
1890 rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
1892 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
1893 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1896 #ifdef CONFIG_DEBUG_FS
1897 qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
1900 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1901 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
1902 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
1903 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
1905 if (mode == QEDI_MODE_NORMAL) {
1906 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
1907 QEDI_ERR(&qedi->dbg_ctx,
1908 "Could not add iscsi host\n");
1913 /* Allocate uio buffers */
1914 rc = qedi_alloc_uio_rings(qedi);
1916 QEDI_ERR(&qedi->dbg_ctx,
1917 "UIO alloc ring failed err=%d\n", rc);
1921 rc = qedi_init_uio(qedi);
1923 QEDI_ERR(&qedi->dbg_ctx,
1924 "UIO init failed, err=%d\n", rc);
1928 /* host the array on iscsi_conn */
1929 rc = qedi_setup_cid_que(qedi);
1931 QEDI_ERR(&qedi->dbg_ctx,
1932 "Could not setup cid que\n");
1936 rc = qedi_cm_alloc_mem(qedi);
1938 QEDI_ERR(&qedi->dbg_ctx,
1939 "Could not alloc cm memory\n");
1943 rc = qedi_alloc_itt(qedi);
1945 QEDI_ERR(&qedi->dbg_ctx,
1946 "Could not alloc itt memory\n");
1950 sprintf(host_buf, "host_%d", qedi->shost->host_no);
1951 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
1952 if (!qedi->tmf_thread) {
1953 QEDI_ERR(&qedi->dbg_ctx,
1954 "Unable to start tmf thread!\n");
1959 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
1960 qedi->offload_thread = create_workqueue(host_buf);
1961 if (!qedi->offload_thread) {
1962 QEDI_ERR(&qedi->dbg_ctx,
1963 "Unable to start offload thread!\n");
1968 /* F/w needs 1st task context memory entry for performance */
1969 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
1970 atomic_set(&qedi->num_offloads, 0);
1976 qedi_release_cid_que(qedi);
1978 qedi_free_uio(qedi->udev);
1980 #ifdef CONFIG_DEBUG_FS
1981 qedi_dbg_host_exit(&qedi->dbg_ctx);
1983 iscsi_host_remove(qedi->shost);
1985 qedi_ops->stop(qedi->cdev);
1987 qedi_ops->common->slowpath_stop(qedi->cdev);
1989 qedi_ops->common->remove(qedi->cdev);
1991 qedi_free_iscsi_pf_param(qedi);
1993 iscsi_host_free(qedi->shost);
1998 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2000 return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2003 static void qedi_remove(struct pci_dev *pdev)
2005 __qedi_remove(pdev, QEDI_MODE_NORMAL);
2008 static struct pci_device_id qedi_pci_tbl[] = {
2009 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
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);