2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
18 #include <linux/mempool.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/workqueue.h>
22 #include <linux/pci.h>
23 #include <linux/scatterlist.h>
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/delay.h>
29 #include <linux/gfp.h>
30 #include <scsi/scsi.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_device.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/fc/fc_els.h>
36 #include <scsi/fc/fc_fcoe.h>
37 #include <scsi/libfc.h>
38 #include <scsi/fc_frame.h>
42 const char *fnic_state_str[] = {
43 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
44 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
45 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
46 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
49 static const char *fnic_ioreq_state_str[] = {
50 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
51 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
52 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
53 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
54 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
57 static const char *fcpio_status_str[] = {
58 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
59 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
60 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
61 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
62 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
63 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
64 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
65 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
66 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
67 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
68 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
69 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
70 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
71 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
72 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
73 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
74 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
75 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
76 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
79 const char *fnic_state_to_str(unsigned int state)
81 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
84 return fnic_state_str[state];
87 static const char *fnic_ioreq_state_to_str(unsigned int state)
89 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
90 !fnic_ioreq_state_str[state])
93 return fnic_ioreq_state_str[state];
96 static const char *fnic_fcpio_status_to_str(unsigned int status)
98 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
101 return fcpio_status_str[status];
104 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
106 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
107 struct scsi_cmnd *sc)
109 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
111 return &fnic->io_req_lock[hash];
114 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
117 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
121 * Unmap the data buffer and sense buffer for an io_req,
122 * also unmap and free the device-private scatter/gather list.
124 static void fnic_release_ioreq_buf(struct fnic *fnic,
125 struct fnic_io_req *io_req,
126 struct scsi_cmnd *sc)
128 if (io_req->sgl_list_pa)
129 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
135 mempool_free(io_req->sgl_list_alloc,
136 fnic->io_sgl_pool[io_req->sgl_type]);
137 if (io_req->sense_buf_pa)
138 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
139 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
142 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
143 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
145 /* if no Ack received from firmware, then nothing to clean */
146 if (!fnic->fw_ack_recd[0])
150 * Update desc_available count based on number of freed descriptors
151 * Account for wraparound
153 if (wq->to_clean_index <= fnic->fw_ack_index[0])
154 wq->ring.desc_avail += (fnic->fw_ack_index[0]
155 - wq->to_clean_index + 1);
157 wq->ring.desc_avail += (wq->ring.desc_count
159 + fnic->fw_ack_index[0] + 1);
162 * just bump clean index to ack_index+1 accounting for wraparound
163 * this will essentially free up all descriptors between
164 * to_clean_index and fw_ack_index, both inclusive
167 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
169 /* we have processed the acks received so far */
170 fnic->fw_ack_recd[0] = 0;
176 * __fnic_set_state_flags
177 * Sets/Clears bits in fnic's state_flags
180 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
181 unsigned long clearbits)
183 struct Scsi_Host *host = fnic->lport->host;
184 int sh_locked = spin_is_locked(host->host_lock);
185 unsigned long flags = 0;
188 spin_lock_irqsave(host->host_lock, flags);
191 fnic->state_flags &= ~st_flags;
193 fnic->state_flags |= st_flags;
196 spin_unlock_irqrestore(host->host_lock, flags);
203 * fnic_fw_reset_handler
204 * Routine to send reset msg to fw
206 int fnic_fw_reset_handler(struct fnic *fnic)
208 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
212 /* indicate fwreset to io path */
213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
215 skb_queue_purge(&fnic->frame_queue);
216 skb_queue_purge(&fnic->tx_queue);
218 /* wait for io cmpl */
219 while (atomic_read(&fnic->in_flight))
220 schedule_timeout(msecs_to_jiffies(1));
222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
225 free_wq_copy_descs(fnic, wq);
227 if (!vnic_wq_copy_desc_avail(wq))
230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
231 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
232 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
233 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
234 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
236 &fnic->fnic_stats.fw_stats.active_fw_reqs));
239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets);
243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
244 "Issued fw reset\n");
246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
248 "Failed to issue fw reset\n");
256 * fnic_flogi_reg_handler
257 * Routine to send flogi register msg to fw
259 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
261 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
262 enum fcpio_flogi_reg_format_type format;
263 struct fc_lport *lp = fnic->lport;
268 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
270 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
271 free_wq_copy_descs(fnic, wq);
273 if (!vnic_wq_copy_desc_avail(wq)) {
275 goto flogi_reg_ioreq_end;
278 if (fnic->ctlr.map_dest) {
279 memset(gw_mac, 0xff, ETH_ALEN);
280 format = FCPIO_FLOGI_REG_DEF_DEST;
282 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
283 format = FCPIO_FLOGI_REG_GW_DEST;
286 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
287 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
290 lp->r_a_tov, lp->e_d_tov);
291 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
292 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
293 fc_id, fnic->data_src_addr, gw_mac);
295 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
296 format, fc_id, gw_mac);
297 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
298 "FLOGI reg issued fcid %x map %d dest %pM\n",
299 fc_id, fnic->ctlr.map_dest, gw_mac);
302 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
303 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
304 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
305 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
306 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
314 * fnic_queue_wq_copy_desc
315 * Routine to enqueue a wq copy desc
317 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
318 struct vnic_wq_copy *wq,
319 struct fnic_io_req *io_req,
320 struct scsi_cmnd *sc,
323 struct scatterlist *sg;
324 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
325 struct fc_rport_libfc_priv *rp = rport->dd_data;
326 struct host_sg_desc *desc;
327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
330 unsigned long intr_flags;
333 struct scsi_lun fc_lun;
337 /* For each SGE, create a device desc entry */
338 desc = io_req->sgl_list;
339 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
340 desc->addr = cpu_to_le64(sg_dma_address(sg));
341 desc->len = cpu_to_le32(sg_dma_len(sg));
346 io_req->sgl_list_pa = pci_map_single
349 sizeof(io_req->sgl_list[0]) * sg_count,
353 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
355 SCSI_SENSE_BUFFERSIZE,
358 int_to_scsilun(sc->device->lun, &fc_lun);
360 pri_tag = FCPIO_ICMND_PTA_SIMPLE;
361 msg[0] = MSG_SIMPLE_TAG;
362 scsi_populate_tag_msg(sc, msg);
363 if (msg[0] == MSG_ORDERED_TAG)
364 pri_tag = FCPIO_ICMND_PTA_ORDERED;
366 /* Enqueue the descriptor in the Copy WQ */
367 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
369 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
370 free_wq_copy_descs(fnic, wq);
372 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
373 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
374 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
375 "fnic_queue_wq_copy_desc failure - no descriptors\n");
376 atomic64_inc(&misc_stats->io_cpwq_alloc_failures);
377 return SCSI_MLQUEUE_HOST_BUSY;
381 if (sc->sc_data_direction == DMA_FROM_DEVICE)
382 flags = FCPIO_ICMND_RDDATA;
383 else if (sc->sc_data_direction == DMA_TO_DEVICE)
384 flags = FCPIO_ICMND_WRDATA;
387 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
388 (rp->flags & FC_RP_FLAGS_RETRY))
389 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
391 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
392 0, exch_flags, io_req->sgl_cnt,
393 SCSI_SENSE_BUFFERSIZE,
395 io_req->sense_buf_pa,
396 0, /* scsi cmd ref, always 0 */
397 pri_tag, /* scsi pri and tag */
398 flags, /* command flags */
399 sc->cmnd, sc->cmd_len,
401 fc_lun.scsi_lun, io_req->port_id,
402 rport->maxframe_size, rp->r_a_tov,
405 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
406 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
407 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
408 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
409 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
411 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
417 * Routine to send a scsi cdb
418 * Called with host_lock held and interrupts disabled.
420 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
422 struct fc_lport *lp = shost_priv(sc->device->host);
423 struct fc_rport *rport;
424 struct fnic_io_req *io_req = NULL;
425 struct fnic *fnic = lport_priv(lp);
426 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
427 struct vnic_wq_copy *wq;
434 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
435 return SCSI_MLQUEUE_HOST_BUSY;
437 rport = starget_to_rport(scsi_target(sc->device));
438 ret = fc_remote_port_chkready(rport);
440 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
446 if (lp->state != LPORT_ST_READY || !(lp->link_up))
447 return SCSI_MLQUEUE_HOST_BUSY;
449 atomic_inc(&fnic->in_flight);
452 * Release host lock, use driver resource specific locks from here.
453 * Don't re-enable interrupts in case they were disabled prior to the
454 * caller disabling them.
456 spin_unlock(lp->host->host_lock);
457 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED;
458 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
460 /* Get a new io_req for this SCSI IO */
461 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
463 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
464 ret = SCSI_MLQUEUE_HOST_BUSY;
467 memset(io_req, 0, sizeof(*io_req));
469 /* Map the data buffer */
470 sg_count = scsi_dma_map(sc);
472 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
473 sc->request->tag, sc, 0, sc->cmnd[0],
474 sg_count, CMD_STATE(sc));
475 mempool_free(io_req, fnic->io_req_pool);
479 /* Determine the type of scatter/gather list we need */
480 io_req->sgl_cnt = sg_count;
481 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
482 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
483 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
487 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
489 if (!io_req->sgl_list) {
490 atomic64_inc(&fnic_stats->io_stats.alloc_failures);
491 ret = SCSI_MLQUEUE_HOST_BUSY;
493 mempool_free(io_req, fnic->io_req_pool);
497 /* Cache sgl list allocated address before alignment */
498 io_req->sgl_list_alloc = io_req->sgl_list;
499 ptr = (unsigned long) io_req->sgl_list;
500 if (ptr % FNIC_SG_DESC_ALIGN) {
501 io_req->sgl_list = (struct host_sg_desc *)
502 (((unsigned long) ptr
503 + FNIC_SG_DESC_ALIGN - 1)
504 & ~(FNIC_SG_DESC_ALIGN - 1));
508 /* initialize rest of io_req */
509 io_req->port_id = rport->port_id;
510 io_req->start_time = jiffies;
511 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
512 CMD_SP(sc) = (char *)io_req;
513 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED;
514 sc->scsi_done = done;
516 /* create copy wq desc and enqueue it */
517 wq = &fnic->wq_copy[0];
518 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
521 * In case another thread cancelled the request,
522 * refetch the pointer under the lock.
524 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
525 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
526 sc->request->tag, sc, 0, 0, 0,
527 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
528 spin_lock_irqsave(io_lock, flags);
529 io_req = (struct fnic_io_req *)CMD_SP(sc);
531 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
532 spin_unlock_irqrestore(io_lock, flags);
534 fnic_release_ioreq_buf(fnic, io_req, sc);
535 mempool_free(io_req, fnic->io_req_pool);
538 atomic64_inc(&fnic_stats->io_stats.active_ios);
539 atomic64_inc(&fnic_stats->io_stats.num_ios);
540 if (atomic64_read(&fnic_stats->io_stats.active_ios) >
541 atomic64_read(&fnic_stats->io_stats.max_active_ios))
542 atomic64_set(&fnic_stats->io_stats.max_active_ios,
543 atomic64_read(&fnic_stats->io_stats.active_ios));
545 /* REVISIT: Use per IO lock in the final code */
546 CMD_FLAGS(sc) |= FNIC_IO_ISSUED;
549 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
550 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
551 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
554 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
555 sc->request->tag, sc, io_req,
557 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc)));
558 atomic_dec(&fnic->in_flight);
559 /* acquire host lock before returning to SCSI */
560 spin_lock(lp->host->host_lock);
564 DEF_SCSI_QCMD(fnic_queuecommand)
567 * fnic_fcpio_fw_reset_cmpl_handler
568 * Routine to handle fw reset completion
570 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
571 struct fcpio_fw_req *desc)
575 struct fcpio_tag tag;
578 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
580 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
582 atomic64_inc(&reset_stats->fw_reset_completions);
584 /* Clean up all outstanding io requests */
585 fnic_cleanup_io(fnic, SCSI_NO_TAG);
587 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0);
588 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0);
590 spin_lock_irqsave(&fnic->fnic_lock, flags);
592 /* fnic should be in FC_TRANS_ETH_MODE */
593 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
594 /* Check status of reset completion */
596 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
597 "reset cmpl success\n");
598 /* Ready to send flogi out */
599 fnic->state = FNIC_IN_ETH_MODE;
601 FNIC_SCSI_DBG(KERN_DEBUG,
603 "fnic fw_reset : failed %s\n",
604 fnic_fcpio_status_to_str(hdr_status));
607 * Unable to change to eth mode, cannot send out flogi
608 * Change state to fc mode, so that subsequent Flogi
609 * requests from libFC will cause more attempts to
610 * reset the firmware. Free the cached flogi
612 fnic->state = FNIC_IN_FC_MODE;
613 atomic64_inc(&reset_stats->fw_reset_failures);
617 FNIC_SCSI_DBG(KERN_DEBUG,
619 "Unexpected state %s while processing"
620 " reset cmpl\n", fnic_state_to_str(fnic->state));
621 atomic64_inc(&reset_stats->fw_reset_failures);
625 /* Thread removing device blocks till firmware reset is complete */
626 if (fnic->remove_wait)
627 complete(fnic->remove_wait);
630 * If fnic is being removed, or fw reset failed
631 * free the flogi frame. Else, send it out
633 if (fnic->remove_wait || ret) {
634 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
635 skb_queue_purge(&fnic->tx_queue);
636 goto reset_cmpl_handler_end;
639 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
643 reset_cmpl_handler_end:
644 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
650 * fnic_fcpio_flogi_reg_cmpl_handler
651 * Routine to handle flogi register completion
653 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
654 struct fcpio_fw_req *desc)
658 struct fcpio_tag tag;
662 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
664 /* Update fnic state based on status of flogi reg completion */
665 spin_lock_irqsave(&fnic->fnic_lock, flags);
667 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
669 /* Check flogi registration completion status */
671 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
672 "flog reg succeeded\n");
673 fnic->state = FNIC_IN_FC_MODE;
675 FNIC_SCSI_DBG(KERN_DEBUG,
677 "fnic flogi reg :failed %s\n",
678 fnic_fcpio_status_to_str(hdr_status));
679 fnic->state = FNIC_IN_ETH_MODE;
683 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
684 "Unexpected fnic state %s while"
685 " processing flogi reg completion\n",
686 fnic_state_to_str(fnic->state));
691 if (fnic->stop_rx_link_events) {
692 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
693 goto reg_cmpl_handler_end;
695 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
698 queue_work(fnic_event_queue, &fnic->frame_work);
700 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
703 reg_cmpl_handler_end:
707 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
710 if (wq->to_clean_index <= wq->to_use_index) {
711 /* out of range, stale request_out index */
712 if (request_out < wq->to_clean_index ||
713 request_out >= wq->to_use_index)
716 /* out of range, stale request_out index */
717 if (request_out < wq->to_clean_index &&
718 request_out >= wq->to_use_index)
721 /* request_out index is in range */
727 * Mark that ack received and store the Ack index. If there are multiple
728 * acks received before Tx thread cleans it up, the latest value will be
729 * used which is correct behavior. This state should be in the copy Wq
730 * instead of in the fnic
732 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
733 unsigned int cq_index,
734 struct fcpio_fw_req *desc)
736 struct vnic_wq_copy *wq;
737 u16 request_out = desc->u.ack.request_out;
739 u64 *ox_id_tag = (u64 *)(void *)desc;
741 /* mark the ack state */
742 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
743 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
745 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
746 if (is_ack_index_in_range(wq, request_out)) {
747 fnic->fw_ack_index[0] = request_out;
748 fnic->fw_ack_recd[0] = 1;
751 &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
753 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
754 FNIC_TRACE(fnic_fcpio_ack_handler,
755 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
756 ox_id_tag[4], ox_id_tag[5]);
760 * fnic_fcpio_icmnd_cmpl_handler
761 * Routine to handle icmnd completions
763 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
764 struct fcpio_fw_req *desc)
768 struct fcpio_tag tag;
771 struct fcpio_icmnd_cmpl *icmnd_cmpl;
772 struct fnic_io_req *io_req;
773 struct scsi_cmnd *sc;
774 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
778 unsigned long start_time;
780 /* Decode the cmpl description to get the io_req id */
781 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
782 fcpio_tag_id_dec(&tag, &id);
783 icmnd_cmpl = &desc->u.icmnd_cmpl;
785 if (id >= fnic->fnic_max_tag_id) {
786 shost_printk(KERN_ERR, fnic->lport->host,
787 "Tag out of range tag %x hdr status = %s\n",
788 id, fnic_fcpio_status_to_str(hdr_status));
792 sc = scsi_host_find_tag(fnic->lport->host, id);
795 atomic64_inc(&fnic_stats->io_stats.sc_null);
796 shost_printk(KERN_ERR, fnic->lport->host,
797 "icmnd_cmpl sc is null - "
798 "hdr status = %s tag = 0x%x desc = 0x%p\n",
799 fnic_fcpio_status_to_str(hdr_status), id, desc);
800 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
801 fnic->lport->host->host_no, id,
802 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
803 (u64)icmnd_cmpl->_resvd0[0]),
804 ((u64)hdr_status << 16 |
805 (u64)icmnd_cmpl->scsi_status << 8 |
806 (u64)icmnd_cmpl->flags), desc,
807 (u64)icmnd_cmpl->residual, 0);
811 io_lock = fnic_io_lock_hash(fnic, sc);
812 spin_lock_irqsave(io_lock, flags);
813 io_req = (struct fnic_io_req *)CMD_SP(sc);
814 WARN_ON_ONCE(!io_req);
816 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
817 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL;
818 spin_unlock_irqrestore(io_lock, flags);
819 shost_printk(KERN_ERR, fnic->lport->host,
820 "icmnd_cmpl io_req is null - "
821 "hdr status = %s tag = 0x%x sc 0x%p\n",
822 fnic_fcpio_status_to_str(hdr_status), id, sc);
825 start_time = io_req->start_time;
827 /* firmware completed the io */
828 io_req->io_completed = 1;
831 * if SCSI-ML has already issued abort on this command,
832 * ignore completion of the IO. The abts path will clean it up
834 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
835 spin_unlock_irqrestore(io_lock, flags);
836 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING;
837 switch (hdr_status) {
839 CMD_FLAGS(sc) |= FNIC_IO_DONE;
840 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
841 "icmnd_cmpl ABTS pending hdr status = %s "
842 "sc 0x%p scsi_status %x residual %d\n",
843 fnic_fcpio_status_to_str(hdr_status), sc,
844 icmnd_cmpl->scsi_status,
845 icmnd_cmpl->residual);
848 CMD_FLAGS(sc) |= FNIC_IO_ABORTED;
851 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
852 "icmnd_cmpl abts pending "
853 "hdr status = %s tag = 0x%x sc = 0x%p\n",
854 fnic_fcpio_status_to_str(hdr_status),
861 /* Mark the IO as complete */
862 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
864 icmnd_cmpl = &desc->u.icmnd_cmpl;
866 switch (hdr_status) {
868 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
869 xfer_len = scsi_bufflen(sc);
870 scsi_set_resid(sc, icmnd_cmpl->residual);
872 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
873 xfer_len -= icmnd_cmpl->residual;
875 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
876 atomic64_inc(&fnic_stats->misc_stats.queue_fulls);
879 case FCPIO_TIMEOUT: /* request was timed out */
880 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout);
881 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
884 case FCPIO_ABORTED: /* request was aborted */
885 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted);
886 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
889 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
890 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch);
891 scsi_set_resid(sc, icmnd_cmpl->residual);
892 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
895 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
896 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources);
897 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
900 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
901 atomic64_inc(&fnic_stats->io_stats.io_not_found);
902 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
905 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
906 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid);
907 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
910 case FCPIO_FW_ERR: /* request was terminated due fw error */
911 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs);
912 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
915 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
916 atomic64_inc(&fnic_stats->misc_stats.mss_invalid);
917 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
920 case FCPIO_INVALID_HEADER: /* header contains invalid data */
921 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
922 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
924 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
925 fnic_fcpio_status_to_str(hdr_status));
926 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
930 if (hdr_status != FCPIO_SUCCESS) {
931 atomic64_inc(&fnic_stats->io_stats.io_failures);
932 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
933 fnic_fcpio_status_to_str(hdr_status));
935 /* Break link with the SCSI command */
937 CMD_FLAGS(sc) |= FNIC_IO_DONE;
939 spin_unlock_irqrestore(io_lock, flags);
941 fnic_release_ioreq_buf(fnic, io_req, sc);
943 mempool_free(io_req, fnic->io_req_pool);
945 cmd_trace = ((u64)hdr_status << 56) |
946 (u64)icmnd_cmpl->scsi_status << 48 |
947 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
948 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
949 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
951 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
952 sc->device->host->host_no, id, sc,
953 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
954 (u64)icmnd_cmpl->_resvd0[0] << 48 |
955 jiffies_to_msecs(jiffies - start_time)),
957 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
959 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
960 fnic->lport->host_stats.fcp_input_requests++;
961 fnic->fcp_input_bytes += xfer_len;
962 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
963 fnic->lport->host_stats.fcp_output_requests++;
964 fnic->fcp_output_bytes += xfer_len;
966 fnic->lport->host_stats.fcp_control_requests++;
968 atomic64_dec(&fnic_stats->io_stats.active_ios);
969 if (atomic64_read(&fnic->io_cmpl_skip))
970 atomic64_dec(&fnic->io_cmpl_skip);
972 atomic64_inc(&fnic_stats->io_stats.io_completions);
974 /* Call SCSI completion function to complete the IO */
979 /* fnic_fcpio_itmf_cmpl_handler
980 * Routine to handle itmf completions
982 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
983 struct fcpio_fw_req *desc)
987 struct fcpio_tag tag;
989 struct scsi_cmnd *sc;
990 struct fnic_io_req *io_req;
991 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
992 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
993 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
994 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
997 unsigned long start_time;
999 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
1000 fcpio_tag_id_dec(&tag, &id);
1002 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
1003 shost_printk(KERN_ERR, fnic->lport->host,
1004 "Tag out of range tag %x hdr status = %s\n",
1005 id, fnic_fcpio_status_to_str(hdr_status));
1009 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
1012 atomic64_inc(&fnic_stats->io_stats.sc_null);
1013 shost_printk(KERN_ERR, fnic->lport->host,
1014 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1015 fnic_fcpio_status_to_str(hdr_status), id);
1018 io_lock = fnic_io_lock_hash(fnic, sc);
1019 spin_lock_irqsave(io_lock, flags);
1020 io_req = (struct fnic_io_req *)CMD_SP(sc);
1021 WARN_ON_ONCE(!io_req);
1023 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1024 spin_unlock_irqrestore(io_lock, flags);
1025 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1026 shost_printk(KERN_ERR, fnic->lport->host,
1027 "itmf_cmpl io_req is null - "
1028 "hdr status = %s tag = 0x%x sc 0x%p\n",
1029 fnic_fcpio_status_to_str(hdr_status), id, sc);
1032 start_time = io_req->start_time;
1034 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1035 /* Abort and terminate completion of device reset req */
1036 /* REVISIT : Add asserts about various flags */
1037 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1038 "dev reset abts cmpl recd. id %x status %s\n",
1039 id, fnic_fcpio_status_to_str(hdr_status));
1040 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1041 CMD_ABTS_STATUS(sc) = hdr_status;
1042 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1043 if (io_req->abts_done)
1044 complete(io_req->abts_done);
1045 spin_unlock_irqrestore(io_lock, flags);
1046 } else if (id & FNIC_TAG_ABORT) {
1047 /* Completion of abort cmd */
1048 switch (hdr_status) {
1052 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1053 atomic64_inc(&abts_stats->abort_fw_timeouts);
1056 &term_stats->terminate_fw_timeouts);
1058 case FCPIO_IO_NOT_FOUND:
1059 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1060 atomic64_inc(&abts_stats->abort_io_not_found);
1063 &term_stats->terminate_io_not_found);
1066 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED)
1067 atomic64_inc(&abts_stats->abort_failures);
1070 &term_stats->terminate_failures);
1073 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
1074 /* This is a late completion. Ignore it */
1075 spin_unlock_irqrestore(io_lock, flags);
1078 CMD_ABTS_STATUS(sc) = hdr_status;
1079 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
1081 atomic64_dec(&fnic_stats->io_stats.active_ios);
1082 if (atomic64_read(&fnic->io_cmpl_skip))
1083 atomic64_dec(&fnic->io_cmpl_skip);
1085 atomic64_inc(&fnic_stats->io_stats.io_completions);
1087 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1088 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls);
1090 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1091 "abts cmpl recd. id %d status %s\n",
1092 (int)(id & FNIC_TAG_MASK),
1093 fnic_fcpio_status_to_str(hdr_status));
1096 * If scsi_eh thread is blocked waiting for abts to complete,
1097 * signal completion to it. IO will be cleaned in the thread
1098 * else clean it in this context
1100 if (io_req->abts_done) {
1101 complete(io_req->abts_done);
1102 spin_unlock_irqrestore(io_lock, flags);
1104 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1105 "abts cmpl, completing IO\n");
1107 sc->result = (DID_ERROR << 16);
1109 spin_unlock_irqrestore(io_lock, flags);
1111 fnic_release_ioreq_buf(fnic, io_req, sc);
1112 mempool_free(io_req, fnic->io_req_pool);
1113 if (sc->scsi_done) {
1114 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1115 sc->device->host->host_no, id,
1117 jiffies_to_msecs(jiffies - start_time),
1119 (((u64)hdr_status << 40) |
1120 (u64)sc->cmnd[0] << 32 |
1121 (u64)sc->cmnd[2] << 24 |
1122 (u64)sc->cmnd[3] << 16 |
1123 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1124 (((u64)CMD_FLAGS(sc) << 32) |
1130 } else if (id & FNIC_TAG_DEV_RST) {
1131 /* Completion of device reset */
1132 CMD_LR_STATUS(sc) = hdr_status;
1133 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1134 spin_unlock_irqrestore(io_lock, flags);
1135 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING;
1136 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1137 sc->device->host->host_no, id, sc,
1138 jiffies_to_msecs(jiffies - start_time),
1140 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1141 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1142 "Terminate pending "
1143 "dev reset cmpl recd. id %d status %s\n",
1144 (int)(id & FNIC_TAG_MASK),
1145 fnic_fcpio_status_to_str(hdr_status));
1148 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) {
1149 /* Need to wait for terminate completion */
1150 spin_unlock_irqrestore(io_lock, flags);
1151 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1152 sc->device->host->host_no, id, sc,
1153 jiffies_to_msecs(jiffies - start_time),
1155 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1156 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1157 "dev reset cmpl recd after time out. "
1158 "id %d status %s\n",
1159 (int)(id & FNIC_TAG_MASK),
1160 fnic_fcpio_status_to_str(hdr_status));
1163 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
1164 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1165 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1166 "dev reset cmpl recd. id %d status %s\n",
1167 (int)(id & FNIC_TAG_MASK),
1168 fnic_fcpio_status_to_str(hdr_status));
1169 if (io_req->dr_done)
1170 complete(io_req->dr_done);
1171 spin_unlock_irqrestore(io_lock, flags);
1174 shost_printk(KERN_ERR, fnic->lport->host,
1175 "Unexpected itmf io state %s tag %x\n",
1176 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
1177 spin_unlock_irqrestore(io_lock, flags);
1183 * fnic_fcpio_cmpl_handler
1184 * Routine to service the cq for wq_copy
1186 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1187 unsigned int cq_index,
1188 struct fcpio_fw_req *desc)
1190 struct fnic *fnic = vnic_dev_priv(vdev);
1192 switch (desc->hdr.type) {
1193 case FCPIO_ICMND_CMPL: /* fw completed a command */
1194 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1195 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1196 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1197 case FCPIO_RESET_CMPL: /* fw completed reset */
1198 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1204 switch (desc->hdr.type) {
1205 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1206 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1209 case FCPIO_ICMND_CMPL: /* fw completed a command */
1210 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1213 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1214 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1217 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1218 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1219 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1222 case FCPIO_RESET_CMPL: /* fw completed reset */
1223 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1227 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1228 "firmware completion type %d\n",
1237 * fnic_wq_copy_cmpl_handler
1238 * Routine to process wq copy
1240 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1242 unsigned int wq_work_done = 0;
1243 unsigned int i, cq_index;
1244 unsigned int cur_work_done;
1246 for (i = 0; i < fnic->wq_copy_count; i++) {
1247 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1248 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
1249 fnic_fcpio_cmpl_handler,
1251 wq_work_done += cur_work_done;
1253 return wq_work_done;
1256 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
1259 struct fnic_io_req *io_req;
1260 unsigned long flags = 0;
1261 struct scsi_cmnd *sc;
1262 spinlock_t *io_lock;
1263 unsigned long start_time = 0;
1264 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1266 for (i = 0; i < fnic->fnic_max_tag_id; i++) {
1267 if (i == exclude_id)
1270 io_lock = fnic_io_lock_tag(fnic, i);
1271 spin_lock_irqsave(io_lock, flags);
1272 sc = scsi_host_find_tag(fnic->lport->host, i);
1274 spin_unlock_irqrestore(io_lock, flags);
1278 io_req = (struct fnic_io_req *)CMD_SP(sc);
1279 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1280 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
1282 * We will be here only when FW completes reset
1283 * without sending completions for outstanding ios.
1285 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE;
1286 if (io_req && io_req->dr_done)
1287 complete(io_req->dr_done);
1288 else if (io_req && io_req->abts_done)
1289 complete(io_req->abts_done);
1290 spin_unlock_irqrestore(io_lock, flags);
1292 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1293 spin_unlock_irqrestore(io_lock, flags);
1297 spin_unlock_irqrestore(io_lock, flags);
1298 goto cleanup_scsi_cmd;
1303 spin_unlock_irqrestore(io_lock, flags);
1306 * If there is a scsi_cmnd associated with this io_req, then
1307 * free the corresponding state
1309 start_time = io_req->start_time;
1310 fnic_release_ioreq_buf(fnic, io_req, sc);
1311 mempool_free(io_req, fnic->io_req_pool);
1314 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1315 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1316 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n",
1317 __func__, (jiffies - start_time));
1319 if (atomic64_read(&fnic->io_cmpl_skip))
1320 atomic64_dec(&fnic->io_cmpl_skip);
1322 atomic64_inc(&fnic_stats->io_stats.io_completions);
1324 /* Complete the command to SCSI */
1325 if (sc->scsi_done) {
1326 FNIC_TRACE(fnic_cleanup_io,
1327 sc->device->host->host_no, i, sc,
1328 jiffies_to_msecs(jiffies - start_time),
1329 0, ((u64)sc->cmnd[0] << 32 |
1330 (u64)sc->cmnd[2] << 24 |
1331 (u64)sc->cmnd[3] << 16 |
1332 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1333 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1340 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1341 struct fcpio_host_req *desc)
1344 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1345 struct fnic_io_req *io_req;
1346 struct scsi_cmnd *sc;
1347 unsigned long flags;
1348 spinlock_t *io_lock;
1349 unsigned long start_time = 0;
1351 /* get the tag reference */
1352 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1353 id &= FNIC_TAG_MASK;
1355 if (id >= fnic->fnic_max_tag_id)
1358 sc = scsi_host_find_tag(fnic->lport->host, id);
1362 io_lock = fnic_io_lock_hash(fnic, sc);
1363 spin_lock_irqsave(io_lock, flags);
1365 /* Get the IO context which this desc refers to */
1366 io_req = (struct fnic_io_req *)CMD_SP(sc);
1368 /* fnic interrupts are turned off by now */
1371 spin_unlock_irqrestore(io_lock, flags);
1372 goto wq_copy_cleanup_scsi_cmd;
1377 spin_unlock_irqrestore(io_lock, flags);
1379 start_time = io_req->start_time;
1380 fnic_release_ioreq_buf(fnic, io_req, sc);
1381 mempool_free(io_req, fnic->io_req_pool);
1383 wq_copy_cleanup_scsi_cmd:
1384 sc->result = DID_NO_CONNECT << 16;
1385 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1386 " DID_NO_CONNECT\n");
1388 if (sc->scsi_done) {
1389 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1390 sc->device->host->host_no, id, sc,
1391 jiffies_to_msecs(jiffies - start_time),
1392 0, ((u64)sc->cmnd[0] << 32 |
1393 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1394 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1395 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1401 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1402 u32 task_req, u8 *fc_lun,
1403 struct fnic_io_req *io_req)
1405 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1406 struct Scsi_Host *host = fnic->lport->host;
1407 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1408 unsigned long flags;
1410 spin_lock_irqsave(host->host_lock, flags);
1411 if (unlikely(fnic_chk_state_flags_locked(fnic,
1412 FNIC_FLAGS_IO_BLOCKED))) {
1413 spin_unlock_irqrestore(host->host_lock, flags);
1416 atomic_inc(&fnic->in_flight);
1417 spin_unlock_irqrestore(host->host_lock, flags);
1419 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1421 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1422 free_wq_copy_descs(fnic, wq);
1424 if (!vnic_wq_copy_desc_avail(wq)) {
1425 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1426 atomic_dec(&fnic->in_flight);
1427 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1428 "fnic_queue_abort_io_req: failure: no descriptors\n");
1429 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures);
1432 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1433 0, task_req, tag, fc_lun, io_req->port_id,
1434 fnic->config.ra_tov, fnic->config.ed_tov);
1436 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1437 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1438 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1439 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1440 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1442 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1443 atomic_dec(&fnic->in_flight);
1448 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1453 struct fnic_io_req *io_req;
1454 spinlock_t *io_lock;
1455 unsigned long flags;
1456 struct scsi_cmnd *sc;
1457 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1458 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1459 struct scsi_lun fc_lun;
1460 enum fnic_ioreq_state old_ioreq_state;
1462 FNIC_SCSI_DBG(KERN_DEBUG,
1464 "fnic_rport_exch_reset called portid 0x%06x\n",
1467 if (fnic->in_remove)
1470 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1472 io_lock = fnic_io_lock_tag(fnic, tag);
1473 spin_lock_irqsave(io_lock, flags);
1474 sc = scsi_host_find_tag(fnic->lport->host, tag);
1476 spin_unlock_irqrestore(io_lock, flags);
1480 io_req = (struct fnic_io_req *)CMD_SP(sc);
1482 if (!io_req || io_req->port_id != port_id) {
1483 spin_unlock_irqrestore(io_lock, flags);
1487 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1488 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1489 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1490 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1492 spin_unlock_irqrestore(io_lock, flags);
1497 * Found IO that is still pending with firmware and
1498 * belongs to rport that went away
1500 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1501 spin_unlock_irqrestore(io_lock, flags);
1504 if (io_req->abts_done) {
1505 shost_printk(KERN_ERR, fnic->lport->host,
1506 "fnic_rport_exch_reset: io_req->abts_done is set "
1508 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1511 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1512 shost_printk(KERN_ERR, fnic->lport->host,
1514 "IO not yet issued %p tag 0x%x flags "
1516 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1518 old_ioreq_state = CMD_STATE(sc);
1519 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1520 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1521 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1522 atomic64_inc(&reset_stats->device_reset_terminates);
1523 abt_tag = (tag | FNIC_TAG_DEV_RST);
1524 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1525 "fnic_rport_exch_reset dev rst sc 0x%p\n",
1529 BUG_ON(io_req->abts_done);
1531 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1532 "fnic_rport_reset_exch: Issuing abts\n");
1534 spin_unlock_irqrestore(io_lock, flags);
1536 /* Now queue the abort command to firmware */
1537 int_to_scsilun(sc->device->lun, &fc_lun);
1539 if (fnic_queue_abort_io_req(fnic, abt_tag,
1540 FCPIO_ITMF_ABT_TASK_TERM,
1541 fc_lun.scsi_lun, io_req)) {
1543 * Revert the cmd state back to old state, if
1544 * it hasn't changed in between. This cmd will get
1545 * aborted later by scsi_eh, or cleaned up during
1548 spin_lock_irqsave(io_lock, flags);
1549 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1550 CMD_STATE(sc) = old_ioreq_state;
1551 spin_unlock_irqrestore(io_lock, flags);
1553 spin_lock_irqsave(io_lock, flags);
1554 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1555 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1557 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1558 spin_unlock_irqrestore(io_lock, flags);
1559 atomic64_inc(&term_stats->terminates);
1563 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1564 atomic64_set(&term_stats->max_terminates, term_cnt);
1568 void fnic_terminate_rport_io(struct fc_rport *rport)
1573 struct fnic_io_req *io_req;
1574 spinlock_t *io_lock;
1575 unsigned long flags;
1576 struct scsi_cmnd *sc;
1577 struct scsi_lun fc_lun;
1578 struct fc_rport_libfc_priv *rdata;
1579 struct fc_lport *lport;
1581 struct fc_rport *cmd_rport;
1582 struct reset_stats *reset_stats;
1583 struct terminate_stats *term_stats;
1584 enum fnic_ioreq_state old_ioreq_state;
1587 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1590 rdata = rport->dd_data;
1593 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1596 lport = rdata->local_port;
1599 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1602 fnic = lport_priv(lport);
1603 FNIC_SCSI_DBG(KERN_DEBUG,
1604 fnic->lport->host, "fnic_terminate_rport_io called"
1605 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1606 rport->port_name, rport->node_name, rport,
1609 if (fnic->in_remove)
1612 reset_stats = &fnic->fnic_stats.reset_stats;
1613 term_stats = &fnic->fnic_stats.term_stats;
1615 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1617 io_lock = fnic_io_lock_tag(fnic, tag);
1618 spin_lock_irqsave(io_lock, flags);
1619 sc = scsi_host_find_tag(fnic->lport->host, tag);
1621 spin_unlock_irqrestore(io_lock, flags);
1625 cmd_rport = starget_to_rport(scsi_target(sc->device));
1626 if (rport != cmd_rport) {
1627 spin_unlock_irqrestore(io_lock, flags);
1631 io_req = (struct fnic_io_req *)CMD_SP(sc);
1633 if (!io_req || rport != cmd_rport) {
1634 spin_unlock_irqrestore(io_lock, flags);
1638 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
1639 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
1640 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1641 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n",
1643 spin_unlock_irqrestore(io_lock, flags);
1647 * Found IO that is still pending with firmware and
1648 * belongs to rport that went away
1650 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1651 spin_unlock_irqrestore(io_lock, flags);
1654 if (io_req->abts_done) {
1655 shost_printk(KERN_ERR, fnic->lport->host,
1656 "fnic_terminate_rport_io: io_req->abts_done is set "
1658 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1660 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) {
1661 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1662 "fnic_terminate_rport_io "
1663 "IO not yet issued %p tag 0x%x flags "
1665 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc));
1667 old_ioreq_state = CMD_STATE(sc);
1668 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1669 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1670 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
1671 atomic64_inc(&reset_stats->device_reset_terminates);
1672 abt_tag = (tag | FNIC_TAG_DEV_RST);
1673 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1674 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc);
1677 BUG_ON(io_req->abts_done);
1679 FNIC_SCSI_DBG(KERN_DEBUG,
1681 "fnic_terminate_rport_io: Issuing abts\n");
1683 spin_unlock_irqrestore(io_lock, flags);
1685 /* Now queue the abort command to firmware */
1686 int_to_scsilun(sc->device->lun, &fc_lun);
1688 if (fnic_queue_abort_io_req(fnic, abt_tag,
1689 FCPIO_ITMF_ABT_TASK_TERM,
1690 fc_lun.scsi_lun, io_req)) {
1692 * Revert the cmd state back to old state, if
1693 * it hasn't changed in between. This cmd will get
1694 * aborted later by scsi_eh, or cleaned up during
1697 spin_lock_irqsave(io_lock, flags);
1698 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1699 CMD_STATE(sc) = old_ioreq_state;
1700 spin_unlock_irqrestore(io_lock, flags);
1702 spin_lock_irqsave(io_lock, flags);
1703 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
1704 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
1706 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
1707 spin_unlock_irqrestore(io_lock, flags);
1708 atomic64_inc(&term_stats->terminates);
1712 if (term_cnt > atomic64_read(&term_stats->max_terminates))
1713 atomic64_set(&term_stats->max_terminates, term_cnt);
1718 * This function is exported to SCSI for sending abort cmnds.
1719 * A SCSI IO is represented by a io_req in the driver.
1720 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1722 int fnic_abort_cmd(struct scsi_cmnd *sc)
1724 struct fc_lport *lp;
1726 struct fnic_io_req *io_req = NULL;
1727 struct fc_rport *rport;
1728 spinlock_t *io_lock;
1729 unsigned long flags;
1730 unsigned long start_time = 0;
1733 struct scsi_lun fc_lun;
1734 struct fnic_stats *fnic_stats;
1735 struct abort_stats *abts_stats;
1736 struct terminate_stats *term_stats;
1737 enum fnic_ioreq_state old_ioreq_state;
1739 DECLARE_COMPLETION_ONSTACK(tm_done);
1741 /* Wait for rport to unblock */
1742 fc_block_scsi_eh(sc);
1744 /* Get local-port, check ready and link up */
1745 lp = shost_priv(sc->device->host);
1747 fnic = lport_priv(lp);
1748 fnic_stats = &fnic->fnic_stats;
1749 abts_stats = &fnic->fnic_stats.abts_stats;
1750 term_stats = &fnic->fnic_stats.term_stats;
1752 rport = starget_to_rport(scsi_target(sc->device));
1753 tag = sc->request->tag;
1754 FNIC_SCSI_DBG(KERN_DEBUG,
1756 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1757 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc));
1759 CMD_FLAGS(sc) = FNIC_NO_FLAGS;
1761 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1763 goto fnic_abort_cmd_end;
1767 * Avoid a race between SCSI issuing the abort and the device
1768 * completing the command.
1770 * If the command is already completed by the fw cmpl code,
1771 * we just return SUCCESS from here. This means that the abort
1772 * succeeded. In the SCSI ML, since the timeout for command has
1773 * happened, the completion wont actually complete the command
1774 * and it will be considered as an aborted command
1776 * The CMD_SP will not be cleared except while holding io_req_lock.
1778 io_lock = fnic_io_lock_hash(fnic, sc);
1779 spin_lock_irqsave(io_lock, flags);
1780 io_req = (struct fnic_io_req *)CMD_SP(sc);
1782 spin_unlock_irqrestore(io_lock, flags);
1783 goto fnic_abort_cmd_end;
1786 io_req->abts_done = &tm_done;
1788 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1789 spin_unlock_irqrestore(io_lock, flags);
1793 * Command is still pending, need to abort it
1794 * If the firmware completes the command after this point,
1795 * the completion wont be done till mid-layer, since abort
1796 * has already started.
1798 old_ioreq_state = CMD_STATE(sc);
1799 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1800 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1802 spin_unlock_irqrestore(io_lock, flags);
1805 * Check readiness of the remote port. If the path to remote
1806 * port is up, then send abts to the remote port to terminate
1807 * the IO. Else, just locally terminate the IO in the firmware
1809 if (fc_remote_port_chkready(rport) == 0)
1810 task_req = FCPIO_ITMF_ABT_TASK;
1812 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
1813 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1816 /* Now queue the abort command to firmware */
1817 int_to_scsilun(sc->device->lun, &fc_lun);
1819 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1820 fc_lun.scsi_lun, io_req)) {
1821 spin_lock_irqsave(io_lock, flags);
1822 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1823 CMD_STATE(sc) = old_ioreq_state;
1824 io_req = (struct fnic_io_req *)CMD_SP(sc);
1826 io_req->abts_done = NULL;
1827 spin_unlock_irqrestore(io_lock, flags);
1829 goto fnic_abort_cmd_end;
1831 if (task_req == FCPIO_ITMF_ABT_TASK) {
1832 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED;
1833 atomic64_inc(&fnic_stats->abts_stats.aborts);
1835 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED;
1836 atomic64_inc(&fnic_stats->term_stats.terminates);
1840 * We queued an abort IO, wait for its completion.
1841 * Once the firmware completes the abort command, it will
1842 * wake up this thread.
1845 wait_for_completion_timeout(&tm_done,
1847 (2 * fnic->config.ra_tov +
1848 fnic->config.ed_tov));
1850 /* Check the abort status */
1851 spin_lock_irqsave(io_lock, flags);
1853 io_req = (struct fnic_io_req *)CMD_SP(sc);
1855 atomic64_inc(&fnic_stats->io_stats.ioreq_null);
1856 spin_unlock_irqrestore(io_lock, flags);
1857 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
1859 goto fnic_abort_cmd_end;
1861 io_req->abts_done = NULL;
1863 /* fw did not complete abort, timed out */
1864 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
1865 spin_unlock_irqrestore(io_lock, flags);
1866 if (task_req == FCPIO_ITMF_ABT_TASK) {
1867 atomic64_inc(&abts_stats->abort_drv_timeouts);
1869 atomic64_inc(&term_stats->terminate_drv_timeouts);
1871 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT;
1873 goto fnic_abort_cmd_end;
1876 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
1879 * firmware completed the abort, check the status,
1880 * free the io_req irrespective of failure or success
1882 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1887 spin_unlock_irqrestore(io_lock, flags);
1889 start_time = io_req->start_time;
1890 fnic_release_ioreq_buf(fnic, io_req, sc);
1891 mempool_free(io_req, fnic->io_req_pool);
1894 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no,
1895 sc->request->tag, sc,
1896 jiffies_to_msecs(jiffies - start_time),
1897 0, ((u64)sc->cmnd[0] << 32 |
1898 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1899 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1900 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
1902 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1903 "Returning from abort cmd type %x %s\n", task_req,
1905 "SUCCESS" : "FAILED");
1909 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1910 struct scsi_cmnd *sc,
1911 struct fnic_io_req *io_req)
1913 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1914 struct Scsi_Host *host = fnic->lport->host;
1915 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1916 struct scsi_lun fc_lun;
1918 unsigned long intr_flags;
1920 spin_lock_irqsave(host->host_lock, intr_flags);
1921 if (unlikely(fnic_chk_state_flags_locked(fnic,
1922 FNIC_FLAGS_IO_BLOCKED))) {
1923 spin_unlock_irqrestore(host->host_lock, intr_flags);
1926 atomic_inc(&fnic->in_flight);
1927 spin_unlock_irqrestore(host->host_lock, intr_flags);
1929 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1931 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1932 free_wq_copy_descs(fnic, wq);
1934 if (!vnic_wq_copy_desc_avail(wq)) {
1935 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1936 "queue_dr_io_req failure - no descriptors\n");
1937 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures);
1942 /* fill in the lun info */
1943 int_to_scsilun(sc->device->lun, &fc_lun);
1945 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1946 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1947 fc_lun.scsi_lun, io_req->port_id,
1948 fnic->config.ra_tov, fnic->config.ed_tov);
1950 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs);
1951 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) >
1952 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs))
1953 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs,
1954 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs));
1957 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1958 atomic_dec(&fnic->in_flight);
1964 * Clean up any pending aborts on the lun
1965 * For each outstanding IO on this lun, whose abort is not completed by fw,
1966 * issue a local abort. Wait for abort to complete. Return 0 if all commands
1967 * successfully aborted, 1 otherwise
1969 static int fnic_clean_pending_aborts(struct fnic *fnic,
1970 struct scsi_cmnd *lr_sc)
1973 struct fnic_io_req *io_req;
1974 spinlock_t *io_lock;
1975 unsigned long flags;
1977 struct scsi_cmnd *sc;
1978 struct scsi_lun fc_lun;
1979 struct scsi_device *lun_dev = lr_sc->device;
1980 DECLARE_COMPLETION_ONSTACK(tm_done);
1981 enum fnic_ioreq_state old_ioreq_state;
1983 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
1984 io_lock = fnic_io_lock_tag(fnic, tag);
1985 spin_lock_irqsave(io_lock, flags);
1986 sc = scsi_host_find_tag(fnic->lport->host, tag);
1988 * ignore this lun reset cmd or cmds that do not belong to
1991 if (!sc || sc == lr_sc || sc->device != lun_dev) {
1992 spin_unlock_irqrestore(io_lock, flags);
1996 io_req = (struct fnic_io_req *)CMD_SP(sc);
1998 if (!io_req || sc->device != lun_dev) {
1999 spin_unlock_irqrestore(io_lock, flags);
2004 * Found IO that is still pending with firmware and
2005 * belongs to the LUN that we are resetting
2007 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2008 "Found IO in %s on lun\n",
2009 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2011 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
2012 spin_unlock_irqrestore(io_lock, flags);
2015 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) &&
2016 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) {
2017 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2018 "%s dev rst not pending sc 0x%p\n", __func__,
2020 spin_unlock_irqrestore(io_lock, flags);
2024 if (io_req->abts_done)
2025 shost_printk(KERN_ERR, fnic->lport->host,
2026 "%s: io_req->abts_done is set state is %s\n",
2027 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc)));
2028 old_ioreq_state = CMD_STATE(sc);
2030 * Any pending IO issued prior to reset is expected to be
2031 * in abts pending state, if not we need to set
2032 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2033 * When IO is completed, the IO will be handed over and
2034 * handled in this function.
2036 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2038 BUG_ON(io_req->abts_done);
2041 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) {
2042 abt_tag |= FNIC_TAG_DEV_RST;
2043 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2044 "%s: dev rst sc 0x%p\n", __func__, sc);
2047 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
2048 io_req->abts_done = &tm_done;
2049 spin_unlock_irqrestore(io_lock, flags);
2051 /* Now queue the abort command to firmware */
2052 int_to_scsilun(sc->device->lun, &fc_lun);
2054 if (fnic_queue_abort_io_req(fnic, abt_tag,
2055 FCPIO_ITMF_ABT_TASK_TERM,
2056 fc_lun.scsi_lun, io_req)) {
2057 spin_lock_irqsave(io_lock, flags);
2058 io_req = (struct fnic_io_req *)CMD_SP(sc);
2060 io_req->abts_done = NULL;
2061 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2062 CMD_STATE(sc) = old_ioreq_state;
2063 spin_unlock_irqrestore(io_lock, flags);
2065 goto clean_pending_aborts_end;
2067 spin_lock_irqsave(io_lock, flags);
2068 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET)
2069 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2070 spin_unlock_irqrestore(io_lock, flags);
2072 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED;
2074 wait_for_completion_timeout(&tm_done,
2076 (fnic->config.ed_tov));
2078 /* Recheck cmd state to check if it is now aborted */
2079 spin_lock_irqsave(io_lock, flags);
2080 io_req = (struct fnic_io_req *)CMD_SP(sc);
2082 spin_unlock_irqrestore(io_lock, flags);
2083 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL;
2087 io_req->abts_done = NULL;
2089 /* if abort is still pending with fw, fail */
2090 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) {
2091 spin_unlock_irqrestore(io_lock, flags);
2092 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE;
2094 goto clean_pending_aborts_end;
2096 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
2098 spin_unlock_irqrestore(io_lock, flags);
2100 fnic_release_ioreq_buf(fnic, io_req, sc);
2101 mempool_free(io_req, fnic->io_req_pool);
2104 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
2106 /* walk again to check, if IOs are still pending in fw */
2107 if (fnic_is_abts_pending(fnic, lr_sc))
2110 clean_pending_aborts_end:
2115 * fnic_scsi_host_start_tag
2116 * Allocates tagid from host's tag list
2119 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2121 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2122 int tag, ret = SCSI_NO_TAG;
2126 pr_err("Tags are not supported\n");
2131 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1);
2132 if (tag >= bqt->max_depth) {
2133 pr_err("Tag allocation failure\n");
2136 } while (test_and_set_bit(tag, bqt->tag_map));
2138 bqt->tag_index[tag] = sc->request;
2139 sc->request->tag = tag;
2141 if (!sc->request->special)
2142 sc->request->special = sc;
2151 * fnic_scsi_host_end_tag
2152 * frees tag allocated by fnic_scsi_host_start_tag.
2155 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc)
2157 struct blk_queue_tag *bqt = fnic->lport->host->bqt;
2158 int tag = sc->request->tag;
2160 if (tag == SCSI_NO_TAG)
2163 BUG_ON(!bqt || !bqt->tag_index[tag]);
2167 bqt->tag_index[tag] = NULL;
2168 clear_bit(tag, bqt->tag_map);
2174 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2175 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2178 int fnic_device_reset(struct scsi_cmnd *sc)
2180 struct fc_lport *lp;
2182 struct fnic_io_req *io_req = NULL;
2183 struct fc_rport *rport;
2186 spinlock_t *io_lock;
2187 unsigned long flags;
2188 unsigned long start_time = 0;
2189 struct scsi_lun fc_lun;
2190 struct fnic_stats *fnic_stats;
2191 struct reset_stats *reset_stats;
2193 DECLARE_COMPLETION_ONSTACK(tm_done);
2194 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
2196 /* Wait for rport to unblock */
2197 fc_block_scsi_eh(sc);
2199 /* Get local-port, check ready and link up */
2200 lp = shost_priv(sc->device->host);
2202 fnic = lport_priv(lp);
2203 fnic_stats = &fnic->fnic_stats;
2204 reset_stats = &fnic->fnic_stats.reset_stats;
2206 atomic64_inc(&reset_stats->device_resets);
2208 rport = starget_to_rport(scsi_target(sc->device));
2209 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2210 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2211 rport->port_id, sc->device->lun, sc);
2213 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2214 goto fnic_device_reset_end;
2216 /* Check if remote port up */
2217 if (fc_remote_port_chkready(rport)) {
2218 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
2219 goto fnic_device_reset_end;
2222 CMD_FLAGS(sc) = FNIC_DEVICE_RESET;
2223 /* Allocate tag if not present */
2225 tag = sc->request->tag;
2226 if (unlikely(tag < 0)) {
2228 * XXX(hch): current the midlayer fakes up a struct
2229 * request for the explicit reset ioctls, and those
2230 * don't have a tag allocated to them. The below
2231 * code pokes into midlayer structures to paper over
2232 * this design issue, but that won't work for blk-mq.
2234 * Either someone who can actually test the hardware
2235 * will have to come up with a similar hack for the
2236 * blk-mq case, or we'll have to bite the bullet and
2237 * fix the way the EH ioctls work for real, but until
2238 * that happens we fail these explicit requests here.
2240 if (shost_use_blk_mq(sc->device->host))
2241 goto fnic_device_reset_end;
2243 tag = fnic_scsi_host_start_tag(fnic, sc);
2244 if (unlikely(tag == SCSI_NO_TAG))
2245 goto fnic_device_reset_end;
2248 io_lock = fnic_io_lock_hash(fnic, sc);
2249 spin_lock_irqsave(io_lock, flags);
2250 io_req = (struct fnic_io_req *)CMD_SP(sc);
2253 * If there is a io_req attached to this command, then use it,
2254 * else allocate a new one.
2257 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
2259 spin_unlock_irqrestore(io_lock, flags);
2260 goto fnic_device_reset_end;
2262 memset(io_req, 0, sizeof(*io_req));
2263 io_req->port_id = rport->port_id;
2264 CMD_SP(sc) = (char *)io_req;
2266 io_req->dr_done = &tm_done;
2267 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
2268 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
2269 spin_unlock_irqrestore(io_lock, flags);
2271 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2274 * issue the device reset, if enqueue failed, clean up the ioreq
2275 * and break assoc with scsi cmd
2277 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2278 spin_lock_irqsave(io_lock, flags);
2279 io_req = (struct fnic_io_req *)CMD_SP(sc);
2281 io_req->dr_done = NULL;
2282 goto fnic_device_reset_clean;
2284 spin_lock_irqsave(io_lock, flags);
2285 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED;
2286 spin_unlock_irqrestore(io_lock, flags);
2289 * Wait on the local completion for LUN reset. The io_req may be
2290 * freed while we wait since we hold no lock.
2292 wait_for_completion_timeout(&tm_done,
2293 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2295 spin_lock_irqsave(io_lock, flags);
2296 io_req = (struct fnic_io_req *)CMD_SP(sc);
2298 spin_unlock_irqrestore(io_lock, flags);
2299 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2300 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2301 goto fnic_device_reset_end;
2303 io_req->dr_done = NULL;
2305 status = CMD_LR_STATUS(sc);
2308 * If lun reset not completed, bail out with failed. io_req
2309 * gets cleaned up during higher levels of EH
2311 if (status == FCPIO_INVALID_CODE) {
2312 atomic64_inc(&reset_stats->device_reset_timeouts);
2313 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2314 "Device reset timed out\n");
2315 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT;
2316 spin_unlock_irqrestore(io_lock, flags);
2317 int_to_scsilun(sc->device->lun, &fc_lun);
2319 * Issue abort and terminate on device reset request.
2320 * If q'ing of terminate fails, retry it after a delay.
2323 spin_lock_irqsave(io_lock, flags);
2324 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) {
2325 spin_unlock_irqrestore(io_lock, flags);
2328 spin_unlock_irqrestore(io_lock, flags);
2329 if (fnic_queue_abort_io_req(fnic,
2330 tag | FNIC_TAG_DEV_RST,
2331 FCPIO_ITMF_ABT_TASK_TERM,
2332 fc_lun.scsi_lun, io_req)) {
2333 wait_for_completion_timeout(&tm_done,
2334 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2336 spin_lock_irqsave(io_lock, flags);
2337 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED;
2338 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
2339 io_req->abts_done = &tm_done;
2340 spin_unlock_irqrestore(io_lock, flags);
2341 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2342 "Abort and terminate issued on Device reset "
2343 "tag 0x%x sc 0x%p\n", tag, sc);
2348 spin_lock_irqsave(io_lock, flags);
2349 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) {
2350 spin_unlock_irqrestore(io_lock, flags);
2351 wait_for_completion_timeout(&tm_done,
2352 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2355 io_req = (struct fnic_io_req *)CMD_SP(sc);
2356 io_req->abts_done = NULL;
2357 goto fnic_device_reset_clean;
2361 spin_unlock_irqrestore(io_lock, flags);
2364 /* Completed, but not successful, clean up the io_req, return fail */
2365 if (status != FCPIO_SUCCESS) {
2366 spin_lock_irqsave(io_lock, flags);
2367 FNIC_SCSI_DBG(KERN_DEBUG,
2369 "Device reset completed - failed\n");
2370 io_req = (struct fnic_io_req *)CMD_SP(sc);
2371 goto fnic_device_reset_clean;
2375 * Clean up any aborts on this lun that have still not
2376 * completed. If any of these fail, then LUN reset fails.
2377 * clean_pending_aborts cleans all cmds on this lun except
2378 * the lun reset cmd. If all cmds get cleaned, the lun reset
2381 if (fnic_clean_pending_aborts(fnic, sc)) {
2382 spin_lock_irqsave(io_lock, flags);
2383 io_req = (struct fnic_io_req *)CMD_SP(sc);
2384 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2385 "Device reset failed"
2386 " since could not abort all IOs\n");
2387 goto fnic_device_reset_clean;
2390 /* Clean lun reset command */
2391 spin_lock_irqsave(io_lock, flags);
2392 io_req = (struct fnic_io_req *)CMD_SP(sc);
2394 /* Completed, and successful */
2397 fnic_device_reset_clean:
2401 spin_unlock_irqrestore(io_lock, flags);
2404 start_time = io_req->start_time;
2405 fnic_release_ioreq_buf(fnic, io_req, sc);
2406 mempool_free(io_req, fnic->io_req_pool);
2409 fnic_device_reset_end:
2410 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no,
2411 sc->request->tag, sc,
2412 jiffies_to_msecs(jiffies - start_time),
2413 0, ((u64)sc->cmnd[0] << 32 |
2414 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2415 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2416 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc)));
2418 /* free tag if it is allocated */
2419 if (unlikely(tag_gen_flag))
2420 fnic_scsi_host_end_tag(fnic, sc);
2422 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2423 "Returning from device reset %s\n",
2425 "SUCCESS" : "FAILED");
2428 atomic64_inc(&reset_stats->device_reset_failures);
2433 /* Clean up all IOs, clean up libFC local port */
2434 int fnic_reset(struct Scsi_Host *shost)
2436 struct fc_lport *lp;
2439 struct reset_stats *reset_stats;
2441 lp = shost_priv(shost);
2442 fnic = lport_priv(lp);
2443 reset_stats = &fnic->fnic_stats.reset_stats;
2445 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2446 "fnic_reset called\n");
2448 atomic64_inc(&reset_stats->fnic_resets);
2451 * Reset local port, this will clean up libFC exchanges,
2452 * reset remote port sessions, and if link is up, begin flogi
2454 ret = lp->tt.lport_reset(lp);
2456 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2457 "Returning from fnic reset %s\n",
2459 "SUCCESS" : "FAILED");
2462 atomic64_inc(&reset_stats->fnic_reset_completions);
2464 atomic64_inc(&reset_stats->fnic_reset_failures);
2470 * SCSI Error handling calls driver's eh_host_reset if all prior
2471 * error handling levels return FAILED. If host reset completes
2472 * successfully, and if link is up, then Fabric login begins.
2474 * Host Reset is the highest level of error recovery. If this fails, then
2475 * host is offlined by SCSI.
2478 int fnic_host_reset(struct scsi_cmnd *sc)
2481 unsigned long wait_host_tmo;
2482 struct Scsi_Host *shost = sc->device->host;
2483 struct fc_lport *lp = shost_priv(shost);
2486 * If fnic_reset is successful, wait for fabric login to complete
2487 * scsi-ml tries to send a TUR to every device if host reset is
2488 * successful, so before returning to scsi, fabric should be up
2490 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2491 if (ret == SUCCESS) {
2492 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2494 while (time_before(jiffies, wait_host_tmo)) {
2495 if ((lp->state == LPORT_ST_READY) &&
2508 * This fxn is called from libFC when host is removed
2510 void fnic_scsi_abort_io(struct fc_lport *lp)
2513 unsigned long flags;
2514 enum fnic_state old_state;
2515 struct fnic *fnic = lport_priv(lp);
2516 DECLARE_COMPLETION_ONSTACK(remove_wait);
2518 /* Issue firmware reset for fnic, wait for reset to complete */
2520 spin_lock_irqsave(&fnic->fnic_lock, flags);
2521 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2522 /* fw reset is in progress, poll for its completion */
2523 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2524 schedule_timeout(msecs_to_jiffies(100));
2525 goto retry_fw_reset;
2528 fnic->remove_wait = &remove_wait;
2529 old_state = fnic->state;
2530 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2531 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2532 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2534 err = fnic_fw_reset_handler(fnic);
2536 spin_lock_irqsave(&fnic->fnic_lock, flags);
2537 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2538 fnic->state = old_state;
2539 fnic->remove_wait = NULL;
2540 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2544 /* Wait for firmware reset to complete */
2545 wait_for_completion_timeout(&remove_wait,
2546 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2548 spin_lock_irqsave(&fnic->fnic_lock, flags);
2549 fnic->remove_wait = NULL;
2550 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2551 "fnic_scsi_abort_io %s\n",
2552 (fnic->state == FNIC_IN_ETH_MODE) ?
2553 "SUCCESS" : "FAILED");
2554 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2559 * This fxn called from libFC to clean up driver IO state on link down
2561 void fnic_scsi_cleanup(struct fc_lport *lp)
2563 unsigned long flags;
2564 enum fnic_state old_state;
2565 struct fnic *fnic = lport_priv(lp);
2567 /* issue fw reset */
2569 spin_lock_irqsave(&fnic->fnic_lock, flags);
2570 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2571 /* fw reset is in progress, poll for its completion */
2572 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2573 schedule_timeout(msecs_to_jiffies(100));
2574 goto retry_fw_reset;
2576 old_state = fnic->state;
2577 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2578 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
2579 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2581 if (fnic_fw_reset_handler(fnic)) {
2582 spin_lock_irqsave(&fnic->fnic_lock, flags);
2583 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2584 fnic->state = old_state;
2585 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
2590 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2594 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2596 struct fnic *fnic = lport_priv(lp);
2598 /* Non-zero sid, nothing to do */
2600 goto call_fc_exch_mgr_reset;
2603 fnic_rport_exch_reset(fnic, did);
2604 goto call_fc_exch_mgr_reset;
2609 * link down or device being removed
2611 if (!fnic->in_remove)
2612 fnic_scsi_cleanup(lp);
2614 fnic_scsi_abort_io(lp);
2616 /* call libFC exch mgr reset to reset its exchanges */
2617 call_fc_exch_mgr_reset:
2618 fc_exch_mgr_reset(lp, sid, did);
2623 * fnic_is_abts_pending() is a helper function that
2624 * walks through tag map to check if there is any IOs pending,if there is one,
2625 * then it returns 1 (true), otherwise 0 (false)
2626 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2627 * otherwise, it checks for all IOs.
2629 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2632 struct fnic_io_req *io_req;
2633 spinlock_t *io_lock;
2634 unsigned long flags;
2636 struct scsi_cmnd *sc;
2637 struct scsi_device *lun_dev = NULL;
2640 lun_dev = lr_sc->device;
2642 /* walk again to check, if IOs are still pending in fw */
2643 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
2644 sc = scsi_host_find_tag(fnic->lport->host, tag);
2646 * ignore this lun reset cmd or cmds that do not belong to
2649 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc)))
2652 io_lock = fnic_io_lock_hash(fnic, sc);
2653 spin_lock_irqsave(io_lock, flags);
2655 io_req = (struct fnic_io_req *)CMD_SP(sc);
2657 if (!io_req || sc->device != lun_dev) {
2658 spin_unlock_irqrestore(io_lock, flags);
2663 * Found IO that is still pending with firmware and
2664 * belongs to the LUN that we are resetting
2666 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2667 "Found IO in %s on lun\n",
2668 fnic_ioreq_state_to_str(CMD_STATE(sc)));
2670 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
2672 spin_unlock_irqrestore(io_lock, flags);