1 /* bnx2fc_io.c: QLogic Linux FCoE offload driver.
2 * IO manager and SCSI IO processing.
4 * Copyright (c) 2008-2013 Broadcom Corporation
5 * Copyright (c) 2014-2016 QLogic Corporation
6 * Copyright (c) 2016-2017 Cavium Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
12 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
17 #define RESERVE_FREE_LIST_INDEX num_possible_cpus()
19 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
21 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
22 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
23 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
24 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
25 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
26 struct fcoe_fcp_rsp_payload *fcp_rsp,
29 void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
30 unsigned int timer_msec)
32 struct bnx2fc_interface *interface = io_req->port->priv;
34 if (queue_delayed_work(interface->timer_work_queue,
35 &io_req->timeout_work,
36 msecs_to_jiffies(timer_msec)))
37 kref_get(&io_req->refcount);
40 static void bnx2fc_cmd_timeout(struct work_struct *work)
42 struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd,
44 u8 cmd_type = io_req->cmd_type;
45 struct bnx2fc_rport *tgt = io_req->tgt;
48 BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d,"
49 "req_flags = %lx\n", cmd_type, io_req->req_flags);
51 spin_lock_bh(&tgt->tgt_lock);
52 if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) {
53 clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
55 * ideally we should hold the io_req until RRQ complets,
56 * and release io_req from timeout hold.
58 spin_unlock_bh(&tgt->tgt_lock);
59 bnx2fc_send_rrq(io_req);
62 if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) {
63 BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n");
69 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
70 &io_req->req_flags)) {
71 /* Handle eh_abort timeout */
72 BNX2FC_IO_DBG(io_req, "eh_abort timed out\n");
73 complete(&io_req->tm_done);
74 } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS,
75 &io_req->req_flags)) {
76 /* Handle internally generated ABTS timeout */
77 BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n",
78 kref_read(&io_req->refcount));
79 if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
80 &io_req->req_flags))) {
82 * Cleanup and return original command to
85 bnx2fc_initiate_cleanup(io_req);
86 kref_put(&io_req->refcount, bnx2fc_cmd_release);
87 spin_unlock_bh(&tgt->tgt_lock);
92 /* Hanlde IO timeout */
93 BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n");
94 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL,
95 &io_req->req_flags)) {
96 BNX2FC_IO_DBG(io_req, "IO completed before "
101 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
102 &io_req->req_flags)) {
103 rc = bnx2fc_initiate_abts(io_req);
107 kref_put(&io_req->refcount, bnx2fc_cmd_release);
108 spin_unlock_bh(&tgt->tgt_lock);
112 BNX2FC_IO_DBG(io_req, "IO already in "
113 "ABTS processing\n");
119 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
120 BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n");
122 if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
123 &io_req->req_flags)) {
124 kref_put(&io_req->refcount, bnx2fc_cmd_release);
125 spin_unlock_bh(&tgt->tgt_lock);
131 * Handle ELS timeout.
132 * tgt_lock is used to sync compl path and timeout
133 * path. If els compl path is processing this IO, we
134 * have nothing to do here, just release the timer hold
136 BNX2FC_IO_DBG(io_req, "ELS timed out\n");
137 if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,
141 /* Indicate the cb_func that this ELS is timed out */
142 set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags);
144 if ((io_req->cb_func) && (io_req->cb_arg)) {
145 io_req->cb_func(io_req->cb_arg);
146 io_req->cb_arg = NULL;
151 printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n",
157 /* release the cmd that was held when timer was set */
158 kref_put(&io_req->refcount, bnx2fc_cmd_release);
159 spin_unlock_bh(&tgt->tgt_lock);
162 static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
164 /* Called with host lock held */
165 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
168 * active_cmd_queue may have other command types as well,
169 * and during flush operation, we want to error back only
172 if (io_req->cmd_type != BNX2FC_SCSI_CMD)
175 BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);
176 if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) {
177 /* Do not call scsi done for this IO */
181 bnx2fc_unmap_sg_list(io_req);
182 io_req->sc_cmd = NULL;
184 /* Sanity checks before returning command to mid-layer */
186 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
187 "IO(0x%x) already cleaned up\n",
191 if (!sc_cmd->device) {
192 pr_err(PFX "0x%x: sc_cmd->device is NULL.\n", io_req->xid);
195 if (!sc_cmd->device->host) {
196 pr_err(PFX "0x%x: sc_cmd->device->host is NULL.\n",
201 sc_cmd->result = err_code << 16;
203 BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
204 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
206 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
207 sc_cmd->SCp.ptr = NULL;
208 sc_cmd->scsi_done(sc_cmd);
211 struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba)
213 struct bnx2fc_cmd_mgr *cmgr;
214 struct io_bdt *bdt_info;
215 struct bnx2fc_cmd *io_req;
220 int num_ios, num_pri_ios;
222 int arr_sz = num_possible_cpus() + 1;
223 u16 min_xid = BNX2FC_MIN_XID;
224 u16 max_xid = hba->max_xid;
226 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
227 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
228 and max_xid 0x%x\n", min_xid, max_xid);
231 BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
233 num_ios = max_xid - min_xid + 1;
234 len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
235 len += sizeof(struct bnx2fc_cmd_mgr);
237 cmgr = kzalloc(len, GFP_KERNEL);
239 printk(KERN_ERR PFX "failed to alloc cmgr\n");
244 cmgr->free_list = kcalloc(arr_sz, sizeof(*cmgr->free_list),
246 if (!cmgr->free_list) {
247 printk(KERN_ERR PFX "failed to alloc free_list\n");
251 cmgr->free_list_lock = kcalloc(arr_sz, sizeof(*cmgr->free_list_lock),
253 if (!cmgr->free_list_lock) {
254 printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
255 kfree(cmgr->free_list);
256 cmgr->free_list = NULL;
260 cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
262 for (i = 0; i < arr_sz; i++) {
263 INIT_LIST_HEAD(&cmgr->free_list[i]);
264 spin_lock_init(&cmgr->free_list_lock[i]);
268 * Pre-allocated pool of bnx2fc_cmds.
269 * Last entry in the free list array is the free list
270 * of slow path requests.
272 xid = BNX2FC_MIN_XID;
273 num_pri_ios = num_ios - hba->elstm_xids;
274 for (i = 0; i < num_ios; i++) {
275 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
278 printk(KERN_ERR PFX "failed to alloc io_req\n");
282 INIT_LIST_HEAD(&io_req->link);
283 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
287 list_add_tail(&io_req->link,
288 &cmgr->free_list[io_req->xid %
289 num_possible_cpus()]);
291 list_add_tail(&io_req->link,
292 &cmgr->free_list[num_possible_cpus()]);
296 /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
297 mem_size = num_ios * sizeof(struct io_bdt *);
298 cmgr->io_bdt_pool = kzalloc(mem_size, GFP_KERNEL);
299 if (!cmgr->io_bdt_pool) {
300 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
304 mem_size = sizeof(struct io_bdt);
305 for (i = 0; i < num_ios; i++) {
306 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
307 if (!cmgr->io_bdt_pool[i]) {
308 printk(KERN_ERR PFX "failed to alloc "
309 "io_bdt_pool[%d]\n", i);
314 /* Allocate an map fcoe_bdt_ctx structures */
315 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
316 for (i = 0; i < num_ios; i++) {
317 bdt_info = cmgr->io_bdt_pool[i];
318 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
320 &bdt_info->bd_tbl_dma,
322 if (!bdt_info->bd_tbl) {
323 printk(KERN_ERR PFX "failed to alloc "
332 bnx2fc_cmd_mgr_free(cmgr);
336 void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
338 struct io_bdt *bdt_info;
339 struct bnx2fc_hba *hba = cmgr->hba;
341 u16 min_xid = BNX2FC_MIN_XID;
342 u16 max_xid = hba->max_xid;
346 num_ios = max_xid - min_xid + 1;
348 /* Free fcoe_bdt_ctx structures */
349 if (!cmgr->io_bdt_pool)
352 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
353 for (i = 0; i < num_ios; i++) {
354 bdt_info = cmgr->io_bdt_pool[i];
355 if (bdt_info->bd_tbl) {
356 dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
358 bdt_info->bd_tbl_dma);
359 bdt_info->bd_tbl = NULL;
363 /* Destroy io_bdt pool */
364 for (i = 0; i < num_ios; i++) {
365 kfree(cmgr->io_bdt_pool[i]);
366 cmgr->io_bdt_pool[i] = NULL;
369 kfree(cmgr->io_bdt_pool);
370 cmgr->io_bdt_pool = NULL;
373 kfree(cmgr->free_list_lock);
375 /* Destroy cmd pool */
376 if (!cmgr->free_list)
379 for (i = 0; i < num_possible_cpus() + 1; i++) {
380 struct bnx2fc_cmd *tmp, *io_req;
382 list_for_each_entry_safe(io_req, tmp,
383 &cmgr->free_list[i], link) {
384 list_del(&io_req->link);
388 kfree(cmgr->free_list);
390 /* Free command manager itself */
394 struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
396 struct fcoe_port *port = tgt->port;
397 struct bnx2fc_interface *interface = port->priv;
398 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
399 struct bnx2fc_cmd *io_req;
400 struct list_head *listp;
401 struct io_bdt *bd_tbl;
402 int index = RESERVE_FREE_LIST_INDEX;
407 max_sqes = tgt->max_sqes;
409 case BNX2FC_TASK_MGMT_CMD:
410 max_sqes = BNX2FC_TM_MAX_SQES;
413 max_sqes = BNX2FC_ELS_MAX_SQES;
420 * NOTE: Free list insertions and deletions are protected with
423 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
424 free_sqes = atomic_read(&tgt->free_sqes);
425 if ((list_empty(&(cmd_mgr->free_list[index]))) ||
426 (tgt->num_active_ios.counter >= max_sqes) ||
427 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
428 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
429 "ios(%d):sqes(%d)\n",
430 tgt->num_active_ios.counter, tgt->max_sqes);
431 if (list_empty(&(cmd_mgr->free_list[index])))
432 printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
433 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
437 listp = (struct list_head *)
438 cmd_mgr->free_list[index].next;
439 list_del_init(listp);
440 io_req = (struct bnx2fc_cmd *) listp;
442 cmd_mgr->cmds[xid] = io_req;
443 atomic_inc(&tgt->num_active_ios);
444 atomic_dec(&tgt->free_sqes);
445 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
447 INIT_LIST_HEAD(&io_req->link);
450 io_req->cmd_mgr = cmd_mgr;
451 io_req->req_flags = 0;
452 io_req->cmd_type = type;
454 /* Bind io_bdt for this io_req */
455 /* Have a static link between io_req and io_bdt_pool */
456 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
457 bd_tbl->io_req = io_req;
459 /* Hold the io_req against deletion */
460 kref_init(&io_req->refcount);
464 struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
466 struct fcoe_port *port = tgt->port;
467 struct bnx2fc_interface *interface = port->priv;
468 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
469 struct bnx2fc_cmd *io_req;
470 struct list_head *listp;
471 struct io_bdt *bd_tbl;
475 int index = get_cpu();
477 max_sqes = BNX2FC_SCSI_MAX_SQES;
479 * NOTE: Free list insertions and deletions are protected with
482 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
483 free_sqes = atomic_read(&tgt->free_sqes);
484 if ((list_empty(&cmd_mgr->free_list[index])) ||
485 (tgt->num_active_ios.counter >= max_sqes) ||
486 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
487 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
492 listp = (struct list_head *)
493 cmd_mgr->free_list[index].next;
494 list_del_init(listp);
495 io_req = (struct bnx2fc_cmd *) listp;
497 cmd_mgr->cmds[xid] = io_req;
498 atomic_inc(&tgt->num_active_ios);
499 atomic_dec(&tgt->free_sqes);
500 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
503 INIT_LIST_HEAD(&io_req->link);
506 io_req->cmd_mgr = cmd_mgr;
507 io_req->req_flags = 0;
509 /* Bind io_bdt for this io_req */
510 /* Have a static link between io_req and io_bdt_pool */
511 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
512 bd_tbl->io_req = io_req;
514 /* Hold the io_req against deletion */
515 kref_init(&io_req->refcount);
519 void bnx2fc_cmd_release(struct kref *ref)
521 struct bnx2fc_cmd *io_req = container_of(ref,
522 struct bnx2fc_cmd, refcount);
523 struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
526 if (io_req->cmd_type == BNX2FC_SCSI_CMD)
527 index = io_req->xid % num_possible_cpus();
529 index = RESERVE_FREE_LIST_INDEX;
532 spin_lock_bh(&cmd_mgr->free_list_lock[index]);
533 if (io_req->cmd_type != BNX2FC_SCSI_CMD)
534 bnx2fc_free_mp_resc(io_req);
535 cmd_mgr->cmds[io_req->xid] = NULL;
536 /* Delete IO from retire queue */
537 list_del_init(&io_req->link);
538 /* Add it to the free list */
539 list_add(&io_req->link,
540 &cmd_mgr->free_list[index]);
541 atomic_dec(&io_req->tgt->num_active_ios);
542 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
546 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
548 struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
549 struct bnx2fc_interface *interface = io_req->port->priv;
550 struct bnx2fc_hba *hba = interface->hba;
551 size_t sz = sizeof(struct fcoe_bd_ctx);
554 mp_req->tm_flags = 0;
555 if (mp_req->mp_req_bd) {
556 dma_free_coherent(&hba->pcidev->dev, sz,
558 mp_req->mp_req_bd_dma);
559 mp_req->mp_req_bd = NULL;
561 if (mp_req->mp_resp_bd) {
562 dma_free_coherent(&hba->pcidev->dev, sz,
564 mp_req->mp_resp_bd_dma);
565 mp_req->mp_resp_bd = NULL;
567 if (mp_req->req_buf) {
568 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
570 mp_req->req_buf_dma);
571 mp_req->req_buf = NULL;
573 if (mp_req->resp_buf) {
574 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
576 mp_req->resp_buf_dma);
577 mp_req->resp_buf = NULL;
581 int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
583 struct bnx2fc_mp_req *mp_req;
584 struct fcoe_bd_ctx *mp_req_bd;
585 struct fcoe_bd_ctx *mp_resp_bd;
586 struct bnx2fc_interface *interface = io_req->port->priv;
587 struct bnx2fc_hba *hba = interface->hba;
591 mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
592 memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
594 if (io_req->cmd_type != BNX2FC_ELS) {
595 mp_req->req_len = sizeof(struct fcp_cmnd);
596 io_req->data_xfer_len = mp_req->req_len;
598 mp_req->req_len = io_req->data_xfer_len;
600 mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
601 &mp_req->req_buf_dma,
603 if (!mp_req->req_buf) {
604 printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
605 bnx2fc_free_mp_resc(io_req);
609 mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
610 &mp_req->resp_buf_dma,
612 if (!mp_req->resp_buf) {
613 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
614 bnx2fc_free_mp_resc(io_req);
617 memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE);
618 memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE);
620 /* Allocate and map mp_req_bd and mp_resp_bd */
621 sz = sizeof(struct fcoe_bd_ctx);
622 mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
623 &mp_req->mp_req_bd_dma,
625 if (!mp_req->mp_req_bd) {
626 printk(KERN_ERR PFX "unable to alloc MP req bd\n");
627 bnx2fc_free_mp_resc(io_req);
630 mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
631 &mp_req->mp_resp_bd_dma,
633 if (!mp_req->mp_resp_bd) {
634 printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
635 bnx2fc_free_mp_resc(io_req);
639 addr = mp_req->req_buf_dma;
640 mp_req_bd = mp_req->mp_req_bd;
641 mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
642 mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
643 mp_req_bd->buf_len = CNIC_PAGE_SIZE;
644 mp_req_bd->flags = 0;
647 * MP buffer is either a task mgmt command or an ELS.
648 * So the assumption is that it consumes a single bd
649 * entry in the bd table
651 mp_resp_bd = mp_req->mp_resp_bd;
652 addr = mp_req->resp_buf_dma;
653 mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
654 mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
655 mp_resp_bd->buf_len = CNIC_PAGE_SIZE;
656 mp_resp_bd->flags = 0;
661 static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
663 struct fc_lport *lport;
664 struct fc_rport *rport;
665 struct fc_rport_libfc_priv *rp;
666 struct fcoe_port *port;
667 struct bnx2fc_interface *interface;
668 struct bnx2fc_rport *tgt;
669 struct bnx2fc_cmd *io_req;
670 struct bnx2fc_mp_req *tm_req;
671 struct fcoe_task_ctx_entry *task;
672 struct fcoe_task_ctx_entry *task_page;
673 struct Scsi_Host *host = sc_cmd->device->host;
674 struct fc_frame_header *fc_hdr;
675 struct fcp_cmnd *fcp_cmnd;
680 unsigned long start = jiffies;
682 lport = shost_priv(host);
683 rport = starget_to_rport(scsi_target(sc_cmd->device));
684 port = lport_priv(lport);
685 interface = port->priv;
688 printk(KERN_ERR PFX "device_reset: rport is NULL\n");
694 rc = fc_block_scsi_eh(sc_cmd);
698 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
699 printk(KERN_ERR PFX "device_reset: link is not ready\n");
703 /* rport and tgt are allocated together, so tgt should be non-NULL */
704 tgt = (struct bnx2fc_rport *)&rp[1];
706 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
707 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
712 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
714 if (time_after(jiffies, start + HZ)) {
715 printk(KERN_ERR PFX "tmf: Failed TMF");
722 /* Initialize rest of io_req fields */
723 io_req->sc_cmd = sc_cmd;
727 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
729 rc = bnx2fc_init_mp_req(io_req);
731 printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
732 spin_lock_bh(&tgt->tgt_lock);
733 kref_put(&io_req->refcount, bnx2fc_cmd_release);
734 spin_unlock_bh(&tgt->tgt_lock);
739 io_req->io_req_flags = 0;
740 tm_req->tm_flags = tm_flags;
743 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
744 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
745 memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len);
749 fc_hdr = &(tm_req->req_fc_hdr);
751 did = rport->port_id;
752 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,
753 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
755 /* Obtain exchange id */
758 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
759 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
760 index = xid % BNX2FC_TASKS_PER_PAGE;
762 /* Initialize task context for this IO request */
763 task_page = (struct fcoe_task_ctx_entry *)
764 interface->hba->task_ctx[task_idx];
765 task = &(task_page[index]);
766 bnx2fc_init_mp_task(io_req, task);
768 sc_cmd->SCp.ptr = (char *)io_req;
770 /* Obtain free SQ entry */
771 spin_lock_bh(&tgt->tgt_lock);
772 bnx2fc_add_2_sq(tgt, xid);
774 /* Enqueue the io_req to active_tm_queue */
775 io_req->on_tmf_queue = 1;
776 list_add_tail(&io_req->link, &tgt->active_tm_queue);
778 init_completion(&io_req->tm_done);
779 io_req->wait_for_comp = 1;
782 bnx2fc_ring_doorbell(tgt);
783 spin_unlock_bh(&tgt->tgt_lock);
785 rc = wait_for_completion_timeout(&io_req->tm_done,
786 interface->tm_timeout * HZ);
787 spin_lock_bh(&tgt->tgt_lock);
789 io_req->wait_for_comp = 0;
790 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) {
791 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
792 if (io_req->on_tmf_queue) {
793 list_del_init(&io_req->link);
794 io_req->on_tmf_queue = 0;
796 io_req->wait_for_comp = 1;
797 bnx2fc_initiate_cleanup(io_req);
798 spin_unlock_bh(&tgt->tgt_lock);
799 rc = wait_for_completion_timeout(&io_req->tm_done,
801 spin_lock_bh(&tgt->tgt_lock);
802 io_req->wait_for_comp = 0;
804 kref_put(&io_req->refcount, bnx2fc_cmd_release);
807 spin_unlock_bh(&tgt->tgt_lock);
810 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");
813 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");
820 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
822 struct fc_lport *lport;
823 struct bnx2fc_rport *tgt = io_req->tgt;
824 struct fc_rport *rport = tgt->rport;
825 struct fc_rport_priv *rdata = tgt->rdata;
826 struct bnx2fc_interface *interface;
827 struct fcoe_port *port;
828 struct bnx2fc_cmd *abts_io_req;
829 struct fcoe_task_ctx_entry *task;
830 struct fcoe_task_ctx_entry *task_page;
831 struct fc_frame_header *fc_hdr;
832 struct bnx2fc_mp_req *abts_req;
837 u32 r_a_tov = rdata->r_a_tov;
839 /* called with tgt_lock held */
840 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
843 interface = port->priv;
846 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
847 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
853 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");
858 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
859 printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
864 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
866 printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
871 /* Initialize rest of io_req fields */
872 abts_io_req->sc_cmd = NULL;
873 abts_io_req->port = port;
874 abts_io_req->tgt = tgt;
875 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
877 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
878 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
881 fc_hdr = &(abts_req->req_fc_hdr);
883 /* Obtain oxid and rxid for the original exchange to be aborted */
884 fc_hdr->fh_ox_id = htons(io_req->xid);
885 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
888 did = rport->port_id;
890 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
891 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
894 xid = abts_io_req->xid;
895 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
896 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
897 index = xid % BNX2FC_TASKS_PER_PAGE;
899 /* Initialize task context for this IO request */
900 task_page = (struct fcoe_task_ctx_entry *)
901 interface->hba->task_ctx[task_idx];
902 task = &(task_page[index]);
903 bnx2fc_init_mp_task(abts_io_req, task);
906 * ABTS task is a temporary task that will be cleaned up
907 * irrespective of ABTS response. We need to start the timer
908 * for the original exchange, as the CQE is posted for the original
911 * Timer for ABTS is started only when it is originated by a
912 * TM request. For the ABTS issued as part of ULP timeout,
913 * scsi-ml maintains the timers.
916 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
917 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
919 /* Obtain free SQ entry */
920 bnx2fc_add_2_sq(tgt, xid);
923 bnx2fc_ring_doorbell(tgt);
929 int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,
932 struct fc_lport *lport;
933 struct bnx2fc_rport *tgt = orig_io_req->tgt;
934 struct bnx2fc_interface *interface;
935 struct fcoe_port *port;
936 struct bnx2fc_cmd *seq_clnp_req;
937 struct fcoe_task_ctx_entry *task;
938 struct fcoe_task_ctx_entry *task_page;
939 struct bnx2fc_els_cb_arg *cb_arg = NULL;
944 BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n",
946 kref_get(&orig_io_req->refcount);
948 port = orig_io_req->port;
949 interface = port->priv;
952 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
954 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");
959 seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);
961 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
966 /* Initialize rest of io_req fields */
967 seq_clnp_req->sc_cmd = NULL;
968 seq_clnp_req->port = port;
969 seq_clnp_req->tgt = tgt;
970 seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */
972 xid = seq_clnp_req->xid;
974 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
975 index = xid % BNX2FC_TASKS_PER_PAGE;
977 /* Initialize task context for this IO request */
978 task_page = (struct fcoe_task_ctx_entry *)
979 interface->hba->task_ctx[task_idx];
980 task = &(task_page[index]);
981 cb_arg->aborted_io_req = orig_io_req;
982 cb_arg->io_req = seq_clnp_req;
983 cb_arg->r_ctl = r_ctl;
984 cb_arg->offset = offset;
985 seq_clnp_req->cb_arg = cb_arg;
987 printk(KERN_ERR PFX "call init_seq_cleanup_task\n");
988 bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);
990 /* Obtain free SQ entry */
991 bnx2fc_add_2_sq(tgt, xid);
994 bnx2fc_ring_doorbell(tgt);
999 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
1001 struct fc_lport *lport;
1002 struct bnx2fc_rport *tgt = io_req->tgt;
1003 struct bnx2fc_interface *interface;
1004 struct fcoe_port *port;
1005 struct bnx2fc_cmd *cleanup_io_req;
1006 struct fcoe_task_ctx_entry *task;
1007 struct fcoe_task_ctx_entry *task_page;
1008 int task_idx, index;
1012 /* ASSUMPTION: called with tgt_lock held */
1013 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
1015 port = io_req->port;
1016 interface = port->priv;
1017 lport = port->lport;
1019 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
1020 if (!cleanup_io_req) {
1021 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
1026 /* Initialize rest of io_req fields */
1027 cleanup_io_req->sc_cmd = NULL;
1028 cleanup_io_req->port = port;
1029 cleanup_io_req->tgt = tgt;
1030 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
1032 xid = cleanup_io_req->xid;
1034 task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1035 index = xid % BNX2FC_TASKS_PER_PAGE;
1037 /* Initialize task context for this IO request */
1038 task_page = (struct fcoe_task_ctx_entry *)
1039 interface->hba->task_ctx[task_idx];
1040 task = &(task_page[index]);
1041 orig_xid = io_req->xid;
1043 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
1045 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
1047 /* Obtain free SQ entry */
1048 bnx2fc_add_2_sq(tgt, xid);
1051 bnx2fc_ring_doorbell(tgt);
1058 * bnx2fc_eh_target_reset: Reset a target
1060 * @sc_cmd: SCSI command
1062 * Set from SCSI host template to send task mgmt command to the target
1063 * and wait for the response
1065 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
1067 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
1071 * bnx2fc_eh_device_reset - Reset a single LUN
1073 * @sc_cmd: SCSI command
1075 * Set from SCSI host template to send task mgmt command to the target
1076 * and wait for the response
1078 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1080 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1083 static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)
1085 struct bnx2fc_rport *tgt = io_req->tgt;
1087 unsigned int time_left;
1089 io_req->wait_for_comp = 1;
1090 bnx2fc_initiate_cleanup(io_req);
1092 spin_unlock_bh(&tgt->tgt_lock);
1095 * Can't wait forever on cleanup response lest we let the SCSI error
1096 * handler wait forever
1098 time_left = wait_for_completion_timeout(&io_req->tm_done,
1100 io_req->wait_for_comp = 0;
1102 BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n",
1106 * Release reference held by SCSI command the cleanup completion
1107 * hits the BNX2FC_CLEANUP case in bnx2fc_process_cq_compl() and
1108 * thus the SCSI command is not returnedi by bnx2fc_scsi_done().
1110 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1112 spin_lock_bh(&tgt->tgt_lock);
1117 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1120 * @sc_cmd: SCSI_ML command pointer
1122 * SCSI abort request handler
1124 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1126 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1127 struct fc_rport_libfc_priv *rp = rport->dd_data;
1128 struct bnx2fc_cmd *io_req;
1129 struct fc_lport *lport;
1130 struct bnx2fc_rport *tgt;
1132 unsigned int time_left;
1134 rc = fc_block_scsi_eh(sc_cmd);
1138 lport = shost_priv(sc_cmd->device->host);
1139 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1140 printk(KERN_ERR PFX "eh_abort: link not ready\n");
1144 tgt = (struct bnx2fc_rport *)&rp[1];
1146 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1148 spin_lock_bh(&tgt->tgt_lock);
1149 io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
1151 /* Command might have just completed */
1152 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1153 spin_unlock_bh(&tgt->tgt_lock);
1156 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
1157 kref_read(&io_req->refcount));
1159 /* Hold IO request across abort processing */
1160 kref_get(&io_req->refcount);
1162 BUG_ON(tgt != io_req->tgt);
1164 /* Remove the io_req from the active_q. */
1166 * Task Mgmt functions (LUN RESET & TGT RESET) will not
1167 * issue an ABTS on this particular IO req, as the
1168 * io_req is no longer in the active_q.
1170 if (tgt->flush_in_prog) {
1171 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1172 "flush in progress\n", io_req->xid);
1173 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1174 spin_unlock_bh(&tgt->tgt_lock);
1178 if (io_req->on_active_queue == 0) {
1179 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1180 "not on active_q\n", io_req->xid);
1182 * The IO is still with the FW.
1183 * Return failure and let SCSI-ml retry eh_abort.
1185 spin_unlock_bh(&tgt->tgt_lock);
1190 * Only eh_abort processing will remove the IO from
1191 * active_cmd_q before processing the request. this is
1192 * done to avoid race conditions between IOs aborted
1193 * as part of task management completion and eh_abort
1196 list_del_init(&io_req->link);
1197 io_req->on_active_queue = 0;
1198 /* Move IO req to retire queue */
1199 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1201 init_completion(&io_req->tm_done);
1203 if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
1204 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1205 "already in abts processing\n", io_req->xid);
1206 if (cancel_delayed_work(&io_req->timeout_work))
1207 kref_put(&io_req->refcount,
1208 bnx2fc_cmd_release); /* drop timer hold */
1210 * We don't want to hold off the upper layer timer so simply
1211 * cleanup the command and return that I/O was successfully
1214 rc = bnx2fc_abts_cleanup(io_req);
1215 /* This only occurs when an task abort was requested while ABTS
1216 is in progress. Setting the IO_CLEANUP flag will skip the
1217 RRQ process in the case when the fw generated SCSI_CMD cmpl
1218 was a result from the ABTS request rather than the CLEANUP
1220 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
1225 /* Cancel the current timer running on this io_req */
1226 if (cancel_delayed_work(&io_req->timeout_work))
1227 kref_put(&io_req->refcount,
1228 bnx2fc_cmd_release); /* drop timer hold */
1229 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
1230 io_req->wait_for_comp = 1;
1231 rc = bnx2fc_initiate_abts(io_req);
1233 bnx2fc_initiate_cleanup(io_req);
1234 spin_unlock_bh(&tgt->tgt_lock);
1235 wait_for_completion(&io_req->tm_done);
1236 spin_lock_bh(&tgt->tgt_lock);
1237 io_req->wait_for_comp = 0;
1240 spin_unlock_bh(&tgt->tgt_lock);
1242 /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */
1243 time_left = wait_for_completion_timeout(&io_req->tm_done,
1244 (2 * rp->r_a_tov + 1) * HZ);
1246 BNX2FC_IO_DBG(io_req, "Timed out in eh_abort waiting for tm_done");
1248 spin_lock_bh(&tgt->tgt_lock);
1249 io_req->wait_for_comp = 0;
1250 if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1251 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n");
1253 } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1254 &io_req->req_flags))) {
1255 /* Let the scsi-ml try to recover this command */
1256 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1259 * Cleanup firmware residuals before returning control back
1262 rc = bnx2fc_abts_cleanup(io_req);
1266 * We come here even when there was a race condition
1267 * between timeout and abts completion, and abts
1268 * completion happens just in time.
1270 BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1272 bnx2fc_scsi_done(io_req, DID_ABORT);
1273 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1276 /* release the reference taken in eh_abort */
1277 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1278 spin_unlock_bh(&tgt->tgt_lock);
1282 void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,
1283 struct fcoe_task_ctx_entry *task,
1286 struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;
1287 struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;
1288 u32 offset = cb_arg->offset;
1289 enum fc_rctl r_ctl = cb_arg->r_ctl;
1291 struct bnx2fc_rport *tgt = orig_io_req->tgt;
1293 BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"
1295 seq_clnp_req->xid, seq_clnp_req->cmd_type);
1297 if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {
1298 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",
1303 spin_unlock_bh(&tgt->tgt_lock);
1304 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
1305 spin_lock_bh(&tgt->tgt_lock);
1308 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"
1309 " IO will abort\n");
1310 seq_clnp_req->cb_arg = NULL;
1311 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
1317 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1318 struct fcoe_task_ctx_entry *task,
1321 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1322 "refcnt = %d, cmd_type = %d\n",
1323 kref_read(&io_req->refcount), io_req->cmd_type);
1324 bnx2fc_scsi_done(io_req, DID_ERROR);
1325 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1326 if (io_req->wait_for_comp)
1327 complete(&io_req->tm_done);
1330 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1331 struct fcoe_task_ctx_entry *task,
1335 u32 r_a_tov = FC_DEF_R_A_TOV;
1337 struct bnx2fc_rport *tgt = io_req->tgt;
1339 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1340 "refcnt = %d, cmd_type = %d\n",
1342 kref_read(&io_req->refcount), io_req->cmd_type);
1344 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1345 &io_req->req_flags)) {
1346 BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1351 /* Do not issue RRQ as this IO is already cleanedup */
1352 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1353 &io_req->req_flags))
1357 * For ABTS issued due to SCSI eh_abort_handler, timeout
1358 * values are maintained by scsi-ml itself. Cancel timeout
1359 * in case ABTS issued as part of task management function
1360 * or due to FW error.
1362 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1363 if (cancel_delayed_work(&io_req->timeout_work))
1364 kref_put(&io_req->refcount,
1365 bnx2fc_cmd_release); /* drop timer hold */
1367 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
1370 case FC_RCTL_BA_ACC:
1372 * Dont release this cmd yet. It will be relesed
1373 * after we get RRQ response
1375 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1379 case FC_RCTL_BA_RJT:
1380 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1383 printk(KERN_ERR PFX "Unknown ABTS response\n");
1388 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1389 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1391 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1392 bnx2fc_cmd_timer_set(io_req, r_a_tov);
1395 if (io_req->wait_for_comp) {
1396 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1397 &io_req->req_flags))
1398 complete(&io_req->tm_done);
1401 * We end up here when ABTS is issued as
1402 * in asynchronous context, i.e., as part
1403 * of task management completion, or
1404 * when FW error is received or when the
1405 * ABTS is issued when the IO is timed
1409 if (io_req->on_active_queue) {
1410 list_del_init(&io_req->link);
1411 io_req->on_active_queue = 0;
1412 /* Move IO req to retire queue */
1413 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1415 bnx2fc_scsi_done(io_req, DID_ERROR);
1416 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1420 static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1422 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1423 struct bnx2fc_rport *tgt = io_req->tgt;
1424 struct bnx2fc_cmd *cmd, *tmp;
1425 u64 tm_lun = sc_cmd->device->lun;
1429 /* called with tgt_lock held */
1430 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1432 * Walk thru the active_ios queue and ABORT the IO
1433 * that matches with the LUN that was reset
1435 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1436 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
1437 lun = cmd->sc_cmd->device->lun;
1438 if (lun == tm_lun) {
1439 /* Initiate ABTS on this cmd */
1440 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1442 /* cancel the IO timeout */
1443 if (cancel_delayed_work(&io_req->timeout_work))
1444 kref_put(&io_req->refcount,
1445 bnx2fc_cmd_release);
1447 rc = bnx2fc_initiate_abts(cmd);
1448 /* abts shouldn't fail in this context */
1449 WARN_ON(rc != SUCCESS);
1451 printk(KERN_ERR PFX "lun_rst: abts already in"
1452 " progress for this IO 0x%x\n",
1458 static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1460 struct bnx2fc_rport *tgt = io_req->tgt;
1461 struct bnx2fc_cmd *cmd, *tmp;
1464 /* called with tgt_lock held */
1465 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1467 * Walk thru the active_ios queue and ABORT the IO
1468 * that matches with the LUN that was reset
1470 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1471 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
1473 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1475 /* cancel the IO timeout */
1476 if (cancel_delayed_work(&io_req->timeout_work))
1477 kref_put(&io_req->refcount,
1478 bnx2fc_cmd_release); /* timer hold */
1479 rc = bnx2fc_initiate_abts(cmd);
1480 /* abts shouldn't fail in this context */
1481 WARN_ON(rc != SUCCESS);
1484 printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1485 " for this IO 0x%x\n", cmd->xid);
1489 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
1490 struct fcoe_task_ctx_entry *task, u8 num_rq)
1492 struct bnx2fc_mp_req *tm_req;
1493 struct fc_frame_header *fc_hdr;
1494 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1499 /* Called with tgt_lock held */
1500 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1502 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1503 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1505 /* TM has already timed out and we got
1506 * delayed completion. Ignore completion
1512 tm_req = &(io_req->mp_req);
1513 fc_hdr = &(tm_req->resp_fc_hdr);
1514 hdr = (u64 *)fc_hdr;
1516 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
1517 hdr[0] = cpu_to_be64(temp_hdr[0]);
1518 hdr[1] = cpu_to_be64(temp_hdr[1]);
1519 hdr[2] = cpu_to_be64(temp_hdr[2]);
1522 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
1524 rsp_buf = tm_req->resp_buf;
1526 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1527 bnx2fc_parse_fcp_rsp(io_req,
1528 (struct fcoe_fcp_rsp_payload *)
1530 if (io_req->fcp_rsp_code == 0) {
1532 if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1533 bnx2fc_lun_reset_cmpl(io_req);
1534 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1535 bnx2fc_tgt_reset_cmpl(io_req);
1538 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1541 if (!sc_cmd->SCp.ptr) {
1542 printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n");
1545 switch (io_req->fcp_status) {
1547 if (io_req->cdb_status == 0) {
1548 /* Good IO completion */
1549 sc_cmd->result = DID_OK << 16;
1551 /* Transport status is good, SCSI status not good */
1552 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1554 if (io_req->fcp_resid)
1555 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1559 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1560 io_req->fcp_status);
1564 sc_cmd = io_req->sc_cmd;
1565 io_req->sc_cmd = NULL;
1567 /* check if the io_req exists in tgt's tmf_q */
1568 if (io_req->on_tmf_queue) {
1570 list_del_init(&io_req->link);
1571 io_req->on_tmf_queue = 0;
1574 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");
1578 sc_cmd->SCp.ptr = NULL;
1579 sc_cmd->scsi_done(sc_cmd);
1581 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1582 if (io_req->wait_for_comp) {
1583 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
1584 complete(&io_req->tm_done);
1588 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1591 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1592 int frag_size, sg_frags;
1596 if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1597 frag_size = BNX2FC_BD_SPLIT_SZ;
1600 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1601 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32;
1602 bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1603 bd[bd_index + sg_frags].flags = 0;
1605 addr += (u64) frag_size;
1607 sg_len -= frag_size;
1613 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1615 struct bnx2fc_interface *interface = io_req->port->priv;
1616 struct bnx2fc_hba *hba = interface->hba;
1617 struct scsi_cmnd *sc = io_req->sc_cmd;
1618 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1619 struct scatterlist *sg;
1624 unsigned int sg_len;
1629 * Use dma_map_sg directly to ensure we're using the correct
1630 * dev struct off of pcidev.
1632 sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),
1633 scsi_sg_count(sc), sc->sc_data_direction);
1634 scsi_for_each_sg(sc, sg, sg_count, i) {
1635 sg_len = sg_dma_len(sg);
1636 addr = sg_dma_address(sg);
1637 if (sg_len > BNX2FC_MAX_BD_LEN) {
1638 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1643 bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1644 bd[bd_count].buf_addr_hi = addr >> 32;
1645 bd[bd_count].buf_len = (u16)sg_len;
1646 bd[bd_count].flags = 0;
1648 bd_count += sg_frags;
1649 byte_count += sg_len;
1651 if (byte_count != scsi_bufflen(sc))
1652 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1653 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1658 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
1660 struct scsi_cmnd *sc = io_req->sc_cmd;
1661 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1664 if (scsi_sg_count(sc)) {
1665 bd_count = bnx2fc_map_sg(io_req);
1670 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1671 bd[0].buf_len = bd[0].flags = 0;
1673 io_req->bd_tbl->bd_valid = bd_count;
1678 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1680 struct scsi_cmnd *sc = io_req->sc_cmd;
1681 struct bnx2fc_interface *interface = io_req->port->priv;
1682 struct bnx2fc_hba *hba = interface->hba;
1685 * Use dma_unmap_sg directly to ensure we're using the correct
1686 * dev struct off of pcidev.
1688 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
1689 dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc),
1690 scsi_sg_count(sc), sc->sc_data_direction);
1691 io_req->bd_tbl->bd_valid = 0;
1695 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1696 struct fcp_cmnd *fcp_cmnd)
1698 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1700 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1702 int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun);
1704 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1705 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1707 fcp_cmnd->fc_cmdref = 0;
1708 fcp_cmnd->fc_pri_ta = 0;
1709 fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1710 fcp_cmnd->fc_flags = io_req->io_req_flags;
1711 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
1714 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1715 struct fcoe_fcp_rsp_payload *fcp_rsp,
1718 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1719 struct bnx2fc_rport *tgt = io_req->tgt;
1720 u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1721 u32 rq_buff_len = 0;
1723 unsigned char *rq_data;
1724 unsigned char *dummy;
1725 int fcp_sns_len = 0;
1726 int fcp_rsp_len = 0;
1728 io_req->fcp_status = FC_GOOD;
1729 io_req->fcp_resid = 0;
1730 if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |
1731 FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))
1732 io_req->fcp_resid = fcp_rsp->fcp_resid;
1734 io_req->scsi_comp_flags = rsp_flags;
1735 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
1736 fcp_rsp->scsi_status_code;
1738 /* Fetch fcp_rsp_info and fcp_sns_info if available */
1742 * We do not anticipate num_rq >1, as the linux defined
1743 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1744 * 256 bytes of single rq buffer is good enough to hold this.
1748 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1749 fcp_rsp_len = rq_buff_len
1750 = fcp_rsp->fcp_rsp_len;
1754 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1755 fcp_sns_len = fcp_rsp->fcp_sns_len;
1756 rq_buff_len += fcp_rsp->fcp_sns_len;
1759 io_req->fcp_rsp_len = fcp_rsp_len;
1760 io_req->fcp_sns_len = fcp_sns_len;
1762 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1763 /* Invalid sense sense length. */
1764 printk(KERN_ERR PFX "invalid sns length %d\n",
1766 /* reset rq_buff_len */
1767 rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ;
1770 rq_data = bnx2fc_get_next_rqe(tgt, 1);
1773 /* We do not need extra sense data */
1774 for (i = 1; i < num_rq; i++)
1775 dummy = bnx2fc_get_next_rqe(tgt, 1);
1778 /* fetch fcp_rsp_code */
1779 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1780 /* Only for task management function */
1781 io_req->fcp_rsp_code = rq_data[3];
1782 BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n",
1783 io_req->fcp_rsp_code);
1786 /* fetch sense data */
1787 rq_data += fcp_rsp_len;
1789 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
1790 printk(KERN_ERR PFX "Truncating sense buffer\n");
1791 fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
1794 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1796 memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
1798 /* return RQ entries */
1799 for (i = 0; i < num_rq; i++)
1800 bnx2fc_return_rqe(tgt, 1);
1805 * bnx2fc_queuecommand - Queuecommand function of the scsi template
1807 * @host: The Scsi_Host the command was issued to
1808 * @sc_cmd: struct scsi_cmnd to be executed
1810 * This is the IO strategy routine, called by SCSI-ML
1812 int bnx2fc_queuecommand(struct Scsi_Host *host,
1813 struct scsi_cmnd *sc_cmd)
1815 struct fc_lport *lport = shost_priv(host);
1816 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1817 struct fc_rport_libfc_priv *rp = rport->dd_data;
1818 struct bnx2fc_rport *tgt;
1819 struct bnx2fc_cmd *io_req;
1823 rval = fc_remote_port_chkready(rport);
1825 sc_cmd->result = rval;
1826 sc_cmd->scsi_done(sc_cmd);
1830 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1831 rc = SCSI_MLQUEUE_HOST_BUSY;
1835 /* rport and tgt are allocated together, so tgt should be non-NULL */
1836 tgt = (struct bnx2fc_rport *)&rp[1];
1838 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1840 * Session is not offloaded yet. Let SCSI-ml retry
1843 rc = SCSI_MLQUEUE_TARGET_BUSY;
1846 if (tgt->retry_delay_timestamp) {
1847 if (time_after(jiffies, tgt->retry_delay_timestamp)) {
1848 tgt->retry_delay_timestamp = 0;
1850 /* If retry_delay timer is active, flow off the ML */
1851 rc = SCSI_MLQUEUE_TARGET_BUSY;
1856 spin_lock_bh(&tgt->tgt_lock);
1858 io_req = bnx2fc_cmd_alloc(tgt);
1860 rc = SCSI_MLQUEUE_HOST_BUSY;
1861 goto exit_qcmd_tgtlock;
1863 io_req->sc_cmd = sc_cmd;
1865 if (bnx2fc_post_io_req(tgt, io_req)) {
1866 printk(KERN_ERR PFX "Unable to post io_req\n");
1867 rc = SCSI_MLQUEUE_HOST_BUSY;
1868 goto exit_qcmd_tgtlock;
1872 spin_unlock_bh(&tgt->tgt_lock);
1877 void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
1878 struct fcoe_task_ctx_entry *task,
1881 struct fcoe_fcp_rsp_payload *fcp_rsp;
1882 struct bnx2fc_rport *tgt = io_req->tgt;
1883 struct scsi_cmnd *sc_cmd;
1884 struct Scsi_Host *host;
1887 /* scsi_cmd_cmpl is called with tgt lock held */
1889 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1890 /* we will not receive ABTS response for this IO */
1891 BNX2FC_IO_DBG(io_req, "Timer context finished processing "
1896 /* Cancel the timeout_work, as we received IO completion */
1897 if (cancel_delayed_work(&io_req->timeout_work))
1898 kref_put(&io_req->refcount,
1899 bnx2fc_cmd_release); /* drop timer hold */
1901 sc_cmd = io_req->sc_cmd;
1902 if (sc_cmd == NULL) {
1903 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
1907 /* Fetch fcp_rsp from task context and perform cmd completion */
1908 fcp_rsp = (struct fcoe_fcp_rsp_payload *)
1909 &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);
1911 /* parse fcp_rsp and obtain sense data from RQ if available */
1912 bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq);
1914 host = sc_cmd->device->host;
1915 if (!sc_cmd->SCp.ptr) {
1916 printk(KERN_ERR PFX "SCp.ptr is NULL\n");
1920 if (io_req->on_active_queue) {
1921 list_del_init(&io_req->link);
1922 io_req->on_active_queue = 0;
1923 /* Move IO req to retire queue */
1924 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1926 /* This should not happen, but could have been pulled
1927 * by bnx2fc_flush_active_ios(), or during a race
1928 * between command abort and (late) completion.
1930 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
1931 if (io_req->wait_for_comp)
1932 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1933 &io_req->req_flags))
1934 complete(&io_req->tm_done);
1937 bnx2fc_unmap_sg_list(io_req);
1938 io_req->sc_cmd = NULL;
1940 switch (io_req->fcp_status) {
1942 if (io_req->cdb_status == 0) {
1943 /* Good IO completion */
1944 sc_cmd->result = DID_OK << 16;
1946 /* Transport status is good, SCSI status not good */
1947 BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
1948 " fcp_resid = 0x%x\n",
1949 io_req->cdb_status, io_req->fcp_resid);
1950 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1952 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||
1953 io_req->cdb_status == SAM_STAT_BUSY) {
1954 /* Set the jiffies + retry_delay_timer * 100ms
1955 for the rport/tgt */
1956 tgt->retry_delay_timestamp = jiffies +
1957 fcp_rsp->retry_delay_timer * HZ / 10;
1961 if (io_req->fcp_resid)
1962 scsi_set_resid(sc_cmd, io_req->fcp_resid);
1965 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n",
1966 io_req->fcp_status);
1969 sc_cmd->SCp.ptr = NULL;
1970 sc_cmd->scsi_done(sc_cmd);
1971 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1974 int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
1975 struct bnx2fc_cmd *io_req)
1977 struct fcoe_task_ctx_entry *task;
1978 struct fcoe_task_ctx_entry *task_page;
1979 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1980 struct fcoe_port *port = tgt->port;
1981 struct bnx2fc_interface *interface = port->priv;
1982 struct bnx2fc_hba *hba = interface->hba;
1983 struct fc_lport *lport = port->lport;
1984 struct fc_stats *stats;
1985 int task_idx, index;
1988 /* bnx2fc_post_io_req() is called with the tgt_lock held */
1990 /* Initialize rest of io_req fields */
1991 io_req->cmd_type = BNX2FC_SCSI_CMD;
1992 io_req->port = port;
1994 io_req->data_xfer_len = scsi_bufflen(sc_cmd);
1995 sc_cmd->SCp.ptr = (char *)io_req;
1997 stats = per_cpu_ptr(lport->stats, get_cpu());
1998 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
1999 io_req->io_req_flags = BNX2FC_READ;
2000 stats->InputRequests++;
2001 stats->InputBytes += io_req->data_xfer_len;
2002 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
2003 io_req->io_req_flags = BNX2FC_WRITE;
2004 stats->OutputRequests++;
2005 stats->OutputBytes += io_req->data_xfer_len;
2007 io_req->io_req_flags = 0;
2008 stats->ControlRequests++;
2014 /* Build buffer descriptor list for firmware from sg list */
2015 if (bnx2fc_build_bd_list_from_sg(io_req)) {
2016 printk(KERN_ERR PFX "BD list creation failed\n");
2017 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2021 task_idx = xid / BNX2FC_TASKS_PER_PAGE;
2022 index = xid % BNX2FC_TASKS_PER_PAGE;
2024 /* Initialize task context for this IO request */
2025 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
2026 task = &(task_page[index]);
2027 bnx2fc_init_task(io_req, task);
2029 if (tgt->flush_in_prog) {
2030 printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
2031 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2035 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
2036 printk(KERN_ERR PFX "Session not ready...post_io\n");
2037 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2042 if (tgt->io_timeout)
2043 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
2044 /* Obtain free SQ entry */
2045 bnx2fc_add_2_sq(tgt, xid);
2047 /* Enqueue the io_req to active_cmd_queue */
2049 io_req->on_active_queue = 1;
2050 /* move io_req from pending_queue to active_queue */
2051 list_add_tail(&io_req->link, &tgt->active_cmd_queue);
2054 bnx2fc_ring_doorbell(tgt);