1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 */
6#include <linux/mempool.h>
7#include <linux/errno.h>
8#include <linux/init.h>
9#include <linux/workqueue.h>
10#include <linux/pci.h>
11#include <linux/scatterlist.h>
12#include <linux/skbuff.h>
13#include <linux/spinlock.h>
14#include <linux/etherdevice.h>
15#include <linux/if_ether.h>
16#include <linux/if_vlan.h>
17#include <linux/delay.h>
18#include <linux/gfp.h>
19#include <scsi/scsi.h>
20#include <scsi/scsi_host.h>
21#include <scsi/scsi_device.h>
22#include <scsi/scsi_cmnd.h>
23#include <scsi/scsi_tcq.h>
24#include <scsi/fc/fc_els.h>
25#include <scsi/fc/fc_fcoe.h>
26#include <scsi/libfc.h>
27#include <scsi/fc_frame.h>
28#include "fnic_io.h"
29#include "fnic.h"
30
31const char *fnic_state_str[] = {
32 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
33 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
34 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
35 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
36};
37
38static const char *fnic_ioreq_state_str[] = {
39 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
40 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
41 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
42 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
43 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
44};
45
46static const char *fcpio_status_str[] = {
47 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
48 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
49 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
50 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
51 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
52 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
53 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
54 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
55 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
56 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
57 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
58 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
59 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
60 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
61 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
62 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
63 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
64 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
65 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
66};
67
68const char *fnic_state_to_str(unsigned int state)
69{
70 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
71 return "unknown";
72
73 return fnic_state_str[state];
74}
75
76static const char *fnic_ioreq_state_to_str(unsigned int state)
77{
78 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
79 !fnic_ioreq_state_str[state])
80 return "unknown";
81
82 return fnic_ioreq_state_str[state];
83}
84
85static const char *fnic_fcpio_status_to_str(unsigned int status)
86{
87 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
88 return "unknown";
89
90 return fcpio_status_str[status];
91}
92
93static void fnic_cleanup_io(struct fnic *fnic);
94
95static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
96 struct scsi_cmnd *sc)
97{
98 u32 hash = scsi_cmd_to_rq(scmd: sc)->tag & (FNIC_IO_LOCKS - 1);
99
100 return &fnic->io_req_lock[hash];
101}
102
103static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic,
104 int tag)
105{
106 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)];
107}
108
109/*
110 * Unmap the data buffer and sense buffer for an io_req,
111 * also unmap and free the device-private scatter/gather list.
112 */
113static void fnic_release_ioreq_buf(struct fnic *fnic,
114 struct fnic_io_req *io_req,
115 struct scsi_cmnd *sc)
116{
117 if (io_req->sgl_list_pa)
118 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
119 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
120 DMA_TO_DEVICE);
121 scsi_dma_unmap(cmd: sc);
122
123 if (io_req->sgl_cnt)
124 mempool_free(element: io_req->sgl_list_alloc,
125 pool: fnic->io_sgl_pool[io_req->sgl_type]);
126 if (io_req->sense_buf_pa)
127 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa,
128 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
129}
130
131/* Free up Copy Wq descriptors. Called with copy_wq lock held */
132static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
133{
134 /* if no Ack received from firmware, then nothing to clean */
135 if (!fnic->fw_ack_recd[0])
136 return 1;
137
138 /*
139 * Update desc_available count based on number of freed descriptors
140 * Account for wraparound
141 */
142 if (wq->to_clean_index <= fnic->fw_ack_index[0])
143 wq->ring.desc_avail += (fnic->fw_ack_index[0]
144 - wq->to_clean_index + 1);
145 else
146 wq->ring.desc_avail += (wq->ring.desc_count
147 - wq->to_clean_index
148 + fnic->fw_ack_index[0] + 1);
149
150 /*
151 * just bump clean index to ack_index+1 accounting for wraparound
152 * this will essentially free up all descriptors between
153 * to_clean_index and fw_ack_index, both inclusive
154 */
155 wq->to_clean_index =
156 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
157
158 /* we have processed the acks received so far */
159 fnic->fw_ack_recd[0] = 0;
160 return 0;
161}
162
163
164/*
165 * __fnic_set_state_flags
166 * Sets/Clears bits in fnic's state_flags
167 **/
168void
169__fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
170 unsigned long clearbits)
171{
172 unsigned long flags = 0;
173 unsigned long host_lock_flags = 0;
174
175 spin_lock_irqsave(&fnic->fnic_lock, flags);
176 spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags);
177
178 if (clearbits)
179 fnic->state_flags &= ~st_flags;
180 else
181 fnic->state_flags |= st_flags;
182
183 spin_unlock_irqrestore(lock: fnic->lport->host->host_lock, flags: host_lock_flags);
184 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
185
186 return;
187}
188
189
190/*
191 * fnic_fw_reset_handler
192 * Routine to send reset msg to fw
193 */
194int fnic_fw_reset_handler(struct fnic *fnic)
195{
196 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
197 int ret = 0;
198 unsigned long flags;
199
200 /* indicate fwreset to io path */
201 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
202
203 skb_queue_purge(list: &fnic->frame_queue);
204 skb_queue_purge(list: &fnic->tx_queue);
205
206 /* wait for io cmpl */
207 while (atomic_read(v: &fnic->in_flight))
208 schedule_timeout(timeout: msecs_to_jiffies(m: 1));
209
210 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
211
212 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
213 free_wq_copy_descs(fnic, wq);
214
215 if (!vnic_wq_copy_desc_avail(wq))
216 ret = -EAGAIN;
217 else {
218 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
219 atomic64_inc(v: &fnic->fnic_stats.fw_stats.active_fw_reqs);
220 if (atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs) >
221 atomic64_read(v: &fnic->fnic_stats.fw_stats.max_fw_reqs))
222 atomic64_set(v: &fnic->fnic_stats.fw_stats.max_fw_reqs,
223 i: atomic64_read(
224 v: &fnic->fnic_stats.fw_stats.active_fw_reqs));
225 }
226
227 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags);
228
229 if (!ret) {
230 atomic64_inc(v: &fnic->fnic_stats.reset_stats.fw_resets);
231 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
232 "Issued fw reset\n");
233 } else {
234 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
235 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
236 "Failed to issue fw reset\n");
237 }
238
239 return ret;
240}
241
242
243/*
244 * fnic_flogi_reg_handler
245 * Routine to send flogi register msg to fw
246 */
247int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
248{
249 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
250 enum fcpio_flogi_reg_format_type format;
251 struct fc_lport *lp = fnic->lport;
252 u8 gw_mac[ETH_ALEN];
253 int ret = 0;
254 unsigned long flags;
255
256 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
257
258 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
259 free_wq_copy_descs(fnic, wq);
260
261 if (!vnic_wq_copy_desc_avail(wq)) {
262 ret = -EAGAIN;
263 goto flogi_reg_ioreq_end;
264 }
265
266 if (fnic->ctlr.map_dest) {
267 eth_broadcast_addr(addr: gw_mac);
268 format = FCPIO_FLOGI_REG_DEF_DEST;
269 } else {
270 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
271 format = FCPIO_FLOGI_REG_GW_DEST;
272 }
273
274 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
275 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
276 s_id: fc_id, fcf_mac: gw_mac,
277 ha_mac: fnic->data_src_addr,
278 r_a_tov: lp->r_a_tov, e_d_tov: lp->e_d_tov);
279 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
280 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
281 fc_id, fnic->data_src_addr, gw_mac);
282 } else {
283 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
284 format, s_id: fc_id, gw_mac);
285 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
286 "FLOGI reg issued fcid %x map %d dest %pM\n",
287 fc_id, fnic->ctlr.map_dest, gw_mac);
288 }
289
290 atomic64_inc(v: &fnic->fnic_stats.fw_stats.active_fw_reqs);
291 if (atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs) >
292 atomic64_read(v: &fnic->fnic_stats.fw_stats.max_fw_reqs))
293 atomic64_set(v: &fnic->fnic_stats.fw_stats.max_fw_reqs,
294 i: atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs));
295
296flogi_reg_ioreq_end:
297 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags);
298 return ret;
299}
300
301/*
302 * fnic_queue_wq_copy_desc
303 * Routine to enqueue a wq copy desc
304 */
305static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
306 struct vnic_wq_copy *wq,
307 struct fnic_io_req *io_req,
308 struct scsi_cmnd *sc,
309 int sg_count)
310{
311 struct scatterlist *sg;
312 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
313 struct fc_rport_libfc_priv *rp = rport->dd_data;
314 struct host_sg_desc *desc;
315 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
316 unsigned int i;
317 unsigned long intr_flags;
318 int flags;
319 u8 exch_flags;
320 struct scsi_lun fc_lun;
321
322 if (sg_count) {
323 /* For each SGE, create a device desc entry */
324 desc = io_req->sgl_list;
325 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
326 desc->addr = cpu_to_le64(sg_dma_address(sg));
327 desc->len = cpu_to_le32(sg_dma_len(sg));
328 desc->_resvd = 0;
329 desc++;
330 }
331
332 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev,
333 io_req->sgl_list,
334 sizeof(io_req->sgl_list[0]) * sg_count,
335 DMA_TO_DEVICE);
336 if (dma_mapping_error(dev: &fnic->pdev->dev, dma_addr: io_req->sgl_list_pa)) {
337 printk(KERN_ERR "DMA mapping failed\n");
338 return SCSI_MLQUEUE_HOST_BUSY;
339 }
340 }
341
342 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev,
343 sc->sense_buffer,
344 SCSI_SENSE_BUFFERSIZE,
345 DMA_FROM_DEVICE);
346 if (dma_mapping_error(dev: &fnic->pdev->dev, dma_addr: io_req->sense_buf_pa)) {
347 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa,
348 sizeof(io_req->sgl_list[0]) * sg_count,
349 DMA_TO_DEVICE);
350 printk(KERN_ERR "DMA mapping failed\n");
351 return SCSI_MLQUEUE_HOST_BUSY;
352 }
353
354 int_to_scsilun(sc->device->lun, &fc_lun);
355
356 /* Enqueue the descriptor in the Copy WQ */
357 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
358
359 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
360 free_wq_copy_descs(fnic, wq);
361
362 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
363 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags: intr_flags);
364 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
365 "fnic_queue_wq_copy_desc failure - no descriptors\n");
366 atomic64_inc(v: &misc_stats->io_cpwq_alloc_failures);
367 return SCSI_MLQUEUE_HOST_BUSY;
368 }
369
370 flags = 0;
371 if (sc->sc_data_direction == DMA_FROM_DEVICE)
372 flags = FCPIO_ICMND_RDDATA;
373 else if (sc->sc_data_direction == DMA_TO_DEVICE)
374 flags = FCPIO_ICMND_WRDATA;
375
376 exch_flags = 0;
377 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
378 (rp->flags & FC_RP_FLAGS_RETRY))
379 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
380
381 fnic_queue_wq_copy_desc_icmnd_16(wq, req_id: scsi_cmd_to_rq(scmd: sc)->tag,
382 lunmap_id: 0, spl_flags: exch_flags, sgl_cnt: io_req->sgl_cnt,
383 SCSI_SENSE_BUFFERSIZE,
384 sgl_addr: io_req->sgl_list_pa,
385 sns_addr: io_req->sense_buf_pa,
386 crn: 0, /* scsi cmd ref, always 0 */
387 FCPIO_ICMND_PTA_SIMPLE,
388 /* scsi pri and tag */
389 flags, /* command flags */
390 scsi_cdb: sc->cmnd, cdb_len: sc->cmd_len,
391 data_len: scsi_bufflen(cmd: sc),
392 lun: fc_lun.scsi_lun, d_id: io_req->port_id,
393 mss: rport->maxframe_size, ratov: rp->r_a_tov,
394 edtov: rp->e_d_tov);
395
396 atomic64_inc(v: &fnic->fnic_stats.fw_stats.active_fw_reqs);
397 if (atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs) >
398 atomic64_read(v: &fnic->fnic_stats.fw_stats.max_fw_reqs))
399 atomic64_set(v: &fnic->fnic_stats.fw_stats.max_fw_reqs,
400 i: atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs));
401
402 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags: intr_flags);
403 return 0;
404}
405
406/*
407 * fnic_queuecommand
408 * Routine to send a scsi cdb
409 * Called with host_lock held and interrupts disabled.
410 */
411static int fnic_queuecommand_lck(struct scsi_cmnd *sc)
412{
413 void (*done)(struct scsi_cmnd *) = scsi_done;
414 const int tag = scsi_cmd_to_rq(scmd: sc)->tag;
415 struct fc_lport *lp = shost_priv(shost: sc->device->host);
416 struct fc_rport *rport;
417 struct fnic_io_req *io_req = NULL;
418 struct fnic *fnic = lport_priv(lport: lp);
419 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
420 struct vnic_wq_copy *wq;
421 int ret;
422 u64 cmd_trace;
423 int sg_count = 0;
424 unsigned long flags = 0;
425 unsigned long ptr;
426 spinlock_t *io_lock = NULL;
427 int io_lock_acquired = 0;
428 struct fc_rport_libfc_priv *rp;
429
430 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED)))
431 return SCSI_MLQUEUE_HOST_BUSY;
432
433 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET)))
434 return SCSI_MLQUEUE_HOST_BUSY;
435
436 rport = starget_to_rport(scsi_target(sc->device));
437 if (!rport) {
438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
439 "returning DID_NO_CONNECT for IO as rport is NULL\n");
440 sc->result = DID_NO_CONNECT << 16;
441 done(sc);
442 return 0;
443 }
444
445 ret = fc_remote_port_chkready(rport);
446 if (ret) {
447 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
448 "rport is not ready\n");
449 atomic64_inc(v: &fnic_stats->misc_stats.rport_not_ready);
450 sc->result = ret;
451 done(sc);
452 return 0;
453 }
454
455 rp = rport->dd_data;
456 if (!rp || rp->rp_state == RPORT_ST_DELETE) {
457 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
458 "rport 0x%x removed, returning DID_NO_CONNECT\n",
459 rport->port_id);
460
461 atomic64_inc(v: &fnic_stats->misc_stats.rport_not_ready);
462 sc->result = DID_NO_CONNECT<<16;
463 done(sc);
464 return 0;
465 }
466
467 if (rp->rp_state != RPORT_ST_READY) {
468 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
469 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n",
470 rport->port_id, rp->rp_state);
471
472 sc->result = DID_IMM_RETRY << 16;
473 done(sc);
474 return 0;
475 }
476
477 if (lp->state != LPORT_ST_READY || !(lp->link_up))
478 return SCSI_MLQUEUE_HOST_BUSY;
479
480 atomic_inc(v: &fnic->in_flight);
481
482 /*
483 * Release host lock, use driver resource specific locks from here.
484 * Don't re-enable interrupts in case they were disabled prior to the
485 * caller disabling them.
486 */
487 spin_unlock(lock: lp->host->host_lock);
488 fnic_priv(cmd: sc)->state = FNIC_IOREQ_NOT_INITED;
489 fnic_priv(cmd: sc)->flags = FNIC_NO_FLAGS;
490
491 /* Get a new io_req for this SCSI IO */
492 io_req = mempool_alloc(pool: fnic->io_req_pool, GFP_ATOMIC);
493 if (!io_req) {
494 atomic64_inc(v: &fnic_stats->io_stats.alloc_failures);
495 ret = SCSI_MLQUEUE_HOST_BUSY;
496 goto out;
497 }
498 memset(io_req, 0, sizeof(*io_req));
499
500 /* Map the data buffer */
501 sg_count = scsi_dma_map(cmd: sc);
502 if (sg_count < 0) {
503 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
504 tag, sc, 0, sc->cmnd[0], sg_count, fnic_priv(sc)->state);
505 mempool_free(element: io_req, pool: fnic->io_req_pool);
506 goto out;
507 }
508
509 /* Determine the type of scatter/gather list we need */
510 io_req->sgl_cnt = sg_count;
511 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
512 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
513 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
514
515 if (sg_count) {
516 io_req->sgl_list =
517 mempool_alloc(pool: fnic->io_sgl_pool[io_req->sgl_type],
518 GFP_ATOMIC);
519 if (!io_req->sgl_list) {
520 atomic64_inc(v: &fnic_stats->io_stats.alloc_failures);
521 ret = SCSI_MLQUEUE_HOST_BUSY;
522 scsi_dma_unmap(cmd: sc);
523 mempool_free(element: io_req, pool: fnic->io_req_pool);
524 goto out;
525 }
526
527 /* Cache sgl list allocated address before alignment */
528 io_req->sgl_list_alloc = io_req->sgl_list;
529 ptr = (unsigned long) io_req->sgl_list;
530 if (ptr % FNIC_SG_DESC_ALIGN) {
531 io_req->sgl_list = (struct host_sg_desc *)
532 (((unsigned long) ptr
533 + FNIC_SG_DESC_ALIGN - 1)
534 & ~(FNIC_SG_DESC_ALIGN - 1));
535 }
536 }
537
538 /*
539 * Will acquire lock defore setting to IO initialized.
540 */
541
542 io_lock = fnic_io_lock_hash(fnic, sc);
543 spin_lock_irqsave(io_lock, flags);
544
545 /* initialize rest of io_req */
546 io_lock_acquired = 1;
547 io_req->port_id = rport->port_id;
548 io_req->start_time = jiffies;
549 fnic_priv(cmd: sc)->state = FNIC_IOREQ_CMD_PENDING;
550 fnic_priv(cmd: sc)->io_req = io_req;
551 fnic_priv(cmd: sc)->flags |= FNIC_IO_INITIALIZED;
552
553 /* create copy wq desc and enqueue it */
554 wq = &fnic->wq_copy[0];
555 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
556 if (ret) {
557 /*
558 * In case another thread cancelled the request,
559 * refetch the pointer under the lock.
560 */
561 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
562 tag, sc, 0, 0, 0, fnic_flags_and_state(sc));
563 io_req = fnic_priv(cmd: sc)->io_req;
564 fnic_priv(cmd: sc)->io_req = NULL;
565 fnic_priv(cmd: sc)->state = FNIC_IOREQ_CMD_COMPLETE;
566 spin_unlock_irqrestore(lock: io_lock, flags);
567 if (io_req) {
568 fnic_release_ioreq_buf(fnic, io_req, sc);
569 mempool_free(element: io_req, pool: fnic->io_req_pool);
570 }
571 atomic_dec(v: &fnic->in_flight);
572 /* acquire host lock before returning to SCSI */
573 spin_lock(lock: lp->host->host_lock);
574 return ret;
575 } else {
576 atomic64_inc(v: &fnic_stats->io_stats.active_ios);
577 atomic64_inc(v: &fnic_stats->io_stats.num_ios);
578 if (atomic64_read(v: &fnic_stats->io_stats.active_ios) >
579 atomic64_read(v: &fnic_stats->io_stats.max_active_ios))
580 atomic64_set(v: &fnic_stats->io_stats.max_active_ios,
581 i: atomic64_read(v: &fnic_stats->io_stats.active_ios));
582
583 /* REVISIT: Use per IO lock in the final code */
584 fnic_priv(cmd: sc)->flags |= FNIC_IO_ISSUED;
585 }
586out:
587 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 |
588 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 |
589 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 |
590 sc->cmnd[5]);
591
592 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no,
593 tag, sc, io_req, sg_count, cmd_trace,
594 fnic_flags_and_state(sc));
595
596 /* if only we issued IO, will we have the io lock */
597 if (io_lock_acquired)
598 spin_unlock_irqrestore(lock: io_lock, flags);
599
600 atomic_dec(v: &fnic->in_flight);
601 /* acquire host lock before returning to SCSI */
602 spin_lock(lock: lp->host->host_lock);
603 return ret;
604}
605
606DEF_SCSI_QCMD(fnic_queuecommand)
607
608/*
609 * fnic_fcpio_fw_reset_cmpl_handler
610 * Routine to handle fw reset completion
611 */
612static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
613 struct fcpio_fw_req *desc)
614{
615 u8 type;
616 u8 hdr_status;
617 struct fcpio_tag tag;
618 int ret = 0;
619 unsigned long flags;
620 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
621
622 fcpio_header_dec(hdr: &desc->hdr, type: &type, status: &hdr_status, tag: &tag);
623
624 atomic64_inc(v: &reset_stats->fw_reset_completions);
625
626 /* Clean up all outstanding io requests */
627 fnic_cleanup_io(fnic);
628
629 atomic64_set(v: &fnic->fnic_stats.fw_stats.active_fw_reqs, i: 0);
630 atomic64_set(v: &fnic->fnic_stats.io_stats.active_ios, i: 0);
631 atomic64_set(v: &fnic->io_cmpl_skip, i: 0);
632
633 spin_lock_irqsave(&fnic->fnic_lock, flags);
634
635 /* fnic should be in FC_TRANS_ETH_MODE */
636 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
637 /* Check status of reset completion */
638 if (!hdr_status) {
639 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
640 "reset cmpl success\n");
641 /* Ready to send flogi out */
642 fnic->state = FNIC_IN_ETH_MODE;
643 } else {
644 FNIC_SCSI_DBG(KERN_DEBUG,
645 fnic->lport->host,
646 "fnic fw_reset : failed %s\n",
647 fnic_fcpio_status_to_str(hdr_status));
648
649 /*
650 * Unable to change to eth mode, cannot send out flogi
651 * Change state to fc mode, so that subsequent Flogi
652 * requests from libFC will cause more attempts to
653 * reset the firmware. Free the cached flogi
654 */
655 fnic->state = FNIC_IN_FC_MODE;
656 atomic64_inc(v: &reset_stats->fw_reset_failures);
657 ret = -1;
658 }
659 } else {
660 FNIC_SCSI_DBG(KERN_DEBUG,
661 fnic->lport->host,
662 "Unexpected state %s while processing"
663 " reset cmpl\n", fnic_state_to_str(fnic->state));
664 atomic64_inc(v: &reset_stats->fw_reset_failures);
665 ret = -1;
666 }
667
668 /* Thread removing device blocks till firmware reset is complete */
669 if (fnic->remove_wait)
670 complete(fnic->remove_wait);
671
672 /*
673 * If fnic is being removed, or fw reset failed
674 * free the flogi frame. Else, send it out
675 */
676 if (fnic->remove_wait || ret) {
677 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
678 skb_queue_purge(list: &fnic->tx_queue);
679 goto reset_cmpl_handler_end;
680 }
681
682 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
683
684 fnic_flush_tx(fnic);
685
686 reset_cmpl_handler_end:
687 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET);
688
689 return ret;
690}
691
692/*
693 * fnic_fcpio_flogi_reg_cmpl_handler
694 * Routine to handle flogi register completion
695 */
696static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
697 struct fcpio_fw_req *desc)
698{
699 u8 type;
700 u8 hdr_status;
701 struct fcpio_tag tag;
702 int ret = 0;
703 unsigned long flags;
704
705 fcpio_header_dec(hdr: &desc->hdr, type: &type, status: &hdr_status, tag: &tag);
706
707 /* Update fnic state based on status of flogi reg completion */
708 spin_lock_irqsave(&fnic->fnic_lock, flags);
709
710 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
711
712 /* Check flogi registration completion status */
713 if (!hdr_status) {
714 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
715 "flog reg succeeded\n");
716 fnic->state = FNIC_IN_FC_MODE;
717 } else {
718 FNIC_SCSI_DBG(KERN_DEBUG,
719 fnic->lport->host,
720 "fnic flogi reg :failed %s\n",
721 fnic_fcpio_status_to_str(hdr_status));
722 fnic->state = FNIC_IN_ETH_MODE;
723 ret = -1;
724 }
725 } else {
726 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
727 "Unexpected fnic state %s while"
728 " processing flogi reg completion\n",
729 fnic_state_to_str(fnic->state));
730 ret = -1;
731 }
732
733 if (!ret) {
734 if (fnic->stop_rx_link_events) {
735 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
736 goto reg_cmpl_handler_end;
737 }
738 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
739
740 fnic_flush_tx(fnic);
741 queue_work(wq: fnic_event_queue, work: &fnic->frame_work);
742 } else {
743 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
744 }
745
746reg_cmpl_handler_end:
747 return ret;
748}
749
750static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
751 u16 request_out)
752{
753 if (wq->to_clean_index <= wq->to_use_index) {
754 /* out of range, stale request_out index */
755 if (request_out < wq->to_clean_index ||
756 request_out >= wq->to_use_index)
757 return 0;
758 } else {
759 /* out of range, stale request_out index */
760 if (request_out < wq->to_clean_index &&
761 request_out >= wq->to_use_index)
762 return 0;
763 }
764 /* request_out index is in range */
765 return 1;
766}
767
768
769/*
770 * Mark that ack received and store the Ack index. If there are multiple
771 * acks received before Tx thread cleans it up, the latest value will be
772 * used which is correct behavior. This state should be in the copy Wq
773 * instead of in the fnic
774 */
775static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
776 unsigned int cq_index,
777 struct fcpio_fw_req *desc)
778{
779 struct vnic_wq_copy *wq;
780 u16 request_out = desc->u.ack.request_out;
781 unsigned long flags;
782 u64 *ox_id_tag = (u64 *)(void *)desc;
783
784 /* mark the ack state */
785 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
786 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
787
788 fnic->fnic_stats.misc_stats.last_ack_time = jiffies;
789 if (is_ack_index_in_range(wq, request_out)) {
790 fnic->fw_ack_index[0] = request_out;
791 fnic->fw_ack_recd[0] = 1;
792 } else
793 atomic64_inc(
794 v: &fnic->fnic_stats.misc_stats.ack_index_out_of_range);
795
796 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags);
797 FNIC_TRACE(fnic_fcpio_ack_handler,
798 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3],
799 ox_id_tag[4], ox_id_tag[5]);
800}
801
802/*
803 * fnic_fcpio_icmnd_cmpl_handler
804 * Routine to handle icmnd completions
805 */
806static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
807 struct fcpio_fw_req *desc)
808{
809 u8 type;
810 u8 hdr_status;
811 struct fcpio_tag tag;
812 u32 id;
813 u64 xfer_len = 0;
814 struct fcpio_icmnd_cmpl *icmnd_cmpl;
815 struct fnic_io_req *io_req;
816 struct scsi_cmnd *sc;
817 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
818 unsigned long flags;
819 spinlock_t *io_lock;
820 u64 cmd_trace;
821 unsigned long start_time;
822 unsigned long io_duration_time;
823
824 /* Decode the cmpl description to get the io_req id */
825 fcpio_header_dec(hdr: &desc->hdr, type: &type, status: &hdr_status, tag: &tag);
826 fcpio_tag_id_dec(tag: &tag, id: &id);
827 icmnd_cmpl = &desc->u.icmnd_cmpl;
828
829 if (id >= fnic->fnic_max_tag_id) {
830 shost_printk(KERN_ERR, fnic->lport->host,
831 "Tag out of range tag %x hdr status = %s\n",
832 id, fnic_fcpio_status_to_str(hdr_status));
833 return;
834 }
835
836 sc = scsi_host_find_tag(shost: fnic->lport->host, tag: id);
837 WARN_ON_ONCE(!sc);
838 if (!sc) {
839 atomic64_inc(v: &fnic_stats->io_stats.sc_null);
840 shost_printk(KERN_ERR, fnic->lport->host,
841 "icmnd_cmpl sc is null - "
842 "hdr status = %s tag = 0x%x desc = 0x%p\n",
843 fnic_fcpio_status_to_str(hdr_status), id, desc);
844 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
845 fnic->lport->host->host_no, id,
846 ((u64)icmnd_cmpl->_resvd0[1] << 16 |
847 (u64)icmnd_cmpl->_resvd0[0]),
848 ((u64)hdr_status << 16 |
849 (u64)icmnd_cmpl->scsi_status << 8 |
850 (u64)icmnd_cmpl->flags), desc,
851 (u64)icmnd_cmpl->residual, 0);
852 return;
853 }
854
855 io_lock = fnic_io_lock_hash(fnic, sc);
856 spin_lock_irqsave(io_lock, flags);
857 io_req = fnic_priv(cmd: sc)->io_req;
858 WARN_ON_ONCE(!io_req);
859 if (!io_req) {
860 atomic64_inc(v: &fnic_stats->io_stats.ioreq_null);
861 fnic_priv(cmd: sc)->flags |= FNIC_IO_REQ_NULL;
862 spin_unlock_irqrestore(lock: io_lock, flags);
863 shost_printk(KERN_ERR, fnic->lport->host,
864 "icmnd_cmpl io_req is null - "
865 "hdr status = %s tag = 0x%x sc 0x%p\n",
866 fnic_fcpio_status_to_str(hdr_status), id, sc);
867 return;
868 }
869 start_time = io_req->start_time;
870
871 /* firmware completed the io */
872 io_req->io_completed = 1;
873
874 /*
875 * if SCSI-ML has already issued abort on this command,
876 * set completion of the IO. The abts path will clean it up
877 */
878 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING) {
879
880 /*
881 * set the FNIC_IO_DONE so that this doesn't get
882 * flagged as 'out of order' if it was not aborted
883 */
884 fnic_priv(cmd: sc)->flags |= FNIC_IO_DONE;
885 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABTS_PENDING;
886 spin_unlock_irqrestore(lock: io_lock, flags);
887 if(FCPIO_ABORTED == hdr_status)
888 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABORTED;
889
890 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
891 "icmnd_cmpl abts pending "
892 "hdr status = %s tag = 0x%x sc = 0x%p "
893 "scsi_status = %x residual = %d\n",
894 fnic_fcpio_status_to_str(hdr_status),
895 id, sc,
896 icmnd_cmpl->scsi_status,
897 icmnd_cmpl->residual);
898 return;
899 }
900
901 /* Mark the IO as complete */
902 fnic_priv(cmd: sc)->state = FNIC_IOREQ_CMD_COMPLETE;
903
904 icmnd_cmpl = &desc->u.icmnd_cmpl;
905
906 switch (hdr_status) {
907 case FCPIO_SUCCESS:
908 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
909 xfer_len = scsi_bufflen(cmd: sc);
910
911 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) {
912 xfer_len -= icmnd_cmpl->residual;
913 scsi_set_resid(cmd: sc, resid: icmnd_cmpl->residual);
914 }
915
916 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION)
917 atomic64_inc(v: &fnic_stats->misc_stats.check_condition);
918
919 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
920 atomic64_inc(v: &fnic_stats->misc_stats.queue_fulls);
921 break;
922
923 case FCPIO_TIMEOUT: /* request was timed out */
924 atomic64_inc(v: &fnic_stats->misc_stats.fcpio_timeout);
925 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
926 break;
927
928 case FCPIO_ABORTED: /* request was aborted */
929 atomic64_inc(v: &fnic_stats->misc_stats.fcpio_aborted);
930 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
931 break;
932
933 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
934 atomic64_inc(v: &fnic_stats->misc_stats.data_count_mismatch);
935 scsi_set_resid(cmd: sc, resid: icmnd_cmpl->residual);
936 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
937 break;
938
939 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
940 atomic64_inc(v: &fnic_stats->fw_stats.fw_out_of_resources);
941 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
942 break;
943
944 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
945 atomic64_inc(v: &fnic_stats->io_stats.io_not_found);
946 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
947 break;
948
949 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
950 atomic64_inc(v: &fnic_stats->misc_stats.sgl_invalid);
951 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
952 break;
953
954 case FCPIO_FW_ERR: /* request was terminated due fw error */
955 atomic64_inc(v: &fnic_stats->fw_stats.io_fw_errs);
956 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
957 break;
958
959 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
960 atomic64_inc(v: &fnic_stats->misc_stats.mss_invalid);
961 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
962 break;
963
964 case FCPIO_INVALID_HEADER: /* header contains invalid data */
965 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
966 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
967 default:
968 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
969 break;
970 }
971
972 /* Break link with the SCSI command */
973 fnic_priv(cmd: sc)->io_req = NULL;
974 fnic_priv(cmd: sc)->flags |= FNIC_IO_DONE;
975
976 if (hdr_status != FCPIO_SUCCESS) {
977 atomic64_inc(v: &fnic_stats->io_stats.io_failures);
978 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
979 fnic_fcpio_status_to_str(hdr_status));
980 }
981
982 fnic_release_ioreq_buf(fnic, io_req, sc);
983
984 cmd_trace = ((u64)hdr_status << 56) |
985 (u64)icmnd_cmpl->scsi_status << 48 |
986 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 |
987 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
988 (u64)sc->cmnd[4] << 8 | sc->cmnd[5];
989
990 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler,
991 sc->device->host->host_no, id, sc,
992 ((u64)icmnd_cmpl->_resvd0[1] << 56 |
993 (u64)icmnd_cmpl->_resvd0[0] << 48 |
994 jiffies_to_msecs(jiffies - start_time)),
995 desc, cmd_trace, fnic_flags_and_state(sc));
996
997 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
998 fnic->lport->host_stats.fcp_input_requests++;
999 fnic->fcp_input_bytes += xfer_len;
1000 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
1001 fnic->lport->host_stats.fcp_output_requests++;
1002 fnic->fcp_output_bytes += xfer_len;
1003 } else
1004 fnic->lport->host_stats.fcp_control_requests++;
1005
1006 /* Call SCSI completion function to complete the IO */
1007 scsi_done(cmd: sc);
1008 spin_unlock_irqrestore(lock: io_lock, flags);
1009
1010 mempool_free(element: io_req, pool: fnic->io_req_pool);
1011
1012 atomic64_dec(v: &fnic_stats->io_stats.active_ios);
1013 if (atomic64_read(v: &fnic->io_cmpl_skip))
1014 atomic64_dec(v: &fnic->io_cmpl_skip);
1015 else
1016 atomic64_inc(v: &fnic_stats->io_stats.io_completions);
1017
1018
1019 io_duration_time = jiffies_to_msecs(j: jiffies) -
1020 jiffies_to_msecs(j: start_time);
1021
1022 if(io_duration_time <= 10)
1023 atomic64_inc(v: &fnic_stats->io_stats.io_btw_0_to_10_msec);
1024 else if(io_duration_time <= 100)
1025 atomic64_inc(v: &fnic_stats->io_stats.io_btw_10_to_100_msec);
1026 else if(io_duration_time <= 500)
1027 atomic64_inc(v: &fnic_stats->io_stats.io_btw_100_to_500_msec);
1028 else if(io_duration_time <= 5000)
1029 atomic64_inc(v: &fnic_stats->io_stats.io_btw_500_to_5000_msec);
1030 else if(io_duration_time <= 10000)
1031 atomic64_inc(v: &fnic_stats->io_stats.io_btw_5000_to_10000_msec);
1032 else if(io_duration_time <= 30000)
1033 atomic64_inc(v: &fnic_stats->io_stats.io_btw_10000_to_30000_msec);
1034 else {
1035 atomic64_inc(v: &fnic_stats->io_stats.io_greater_than_30000_msec);
1036
1037 if(io_duration_time > atomic64_read(v: &fnic_stats->io_stats.current_max_io_time))
1038 atomic64_set(v: &fnic_stats->io_stats.current_max_io_time, i: io_duration_time);
1039 }
1040}
1041
1042/* fnic_fcpio_itmf_cmpl_handler
1043 * Routine to handle itmf completions
1044 */
1045static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
1046 struct fcpio_fw_req *desc)
1047{
1048 u8 type;
1049 u8 hdr_status;
1050 struct fcpio_tag ftag;
1051 u32 id;
1052 struct scsi_cmnd *sc = NULL;
1053 struct fnic_io_req *io_req;
1054 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1055 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats;
1056 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1057 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1058 unsigned long flags;
1059 spinlock_t *io_lock;
1060 unsigned long start_time;
1061 unsigned int tag;
1062
1063 fcpio_header_dec(hdr: &desc->hdr, type: &type, status: &hdr_status, tag: &ftag);
1064 fcpio_tag_id_dec(tag: &ftag, id: &id);
1065
1066 tag = id & FNIC_TAG_MASK;
1067 if (tag == fnic->fnic_max_tag_id) {
1068 if (!(id & FNIC_TAG_DEV_RST)) {
1069 shost_printk(KERN_ERR, fnic->lport->host,
1070 "Tag out of range id 0x%x hdr status = %s\n",
1071 id, fnic_fcpio_status_to_str(hdr_status));
1072 return;
1073 }
1074 } else if (tag > fnic->fnic_max_tag_id) {
1075 shost_printk(KERN_ERR, fnic->lport->host,
1076 "Tag out of range tag 0x%x hdr status = %s\n",
1077 tag, fnic_fcpio_status_to_str(hdr_status));
1078 return;
1079 }
1080
1081 if ((tag == fnic->fnic_max_tag_id) && (id & FNIC_TAG_DEV_RST)) {
1082 sc = fnic->sgreset_sc;
1083 io_lock = &fnic->sgreset_lock;
1084 } else {
1085 sc = scsi_host_find_tag(shost: fnic->lport->host, tag: id & FNIC_TAG_MASK);
1086 io_lock = fnic_io_lock_hash(fnic, sc);
1087 }
1088
1089 WARN_ON_ONCE(!sc);
1090 if (!sc) {
1091 atomic64_inc(v: &fnic_stats->io_stats.sc_null);
1092 shost_printk(KERN_ERR, fnic->lport->host,
1093 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n",
1094 fnic_fcpio_status_to_str(hdr_status), tag);
1095 return;
1096 }
1097
1098 spin_lock_irqsave(io_lock, flags);
1099 io_req = fnic_priv(cmd: sc)->io_req;
1100 WARN_ON_ONCE(!io_req);
1101 if (!io_req) {
1102 atomic64_inc(v: &fnic_stats->io_stats.ioreq_null);
1103 spin_unlock_irqrestore(lock: io_lock, flags);
1104 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
1105 shost_printk(KERN_ERR, fnic->lport->host,
1106 "itmf_cmpl io_req is null - "
1107 "hdr status = %s tag = 0x%x sc 0x%p\n",
1108 fnic_fcpio_status_to_str(hdr_status), tag, sc);
1109 return;
1110 }
1111 start_time = io_req->start_time;
1112
1113 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) {
1114 /* Abort and terminate completion of device reset req */
1115 /* REVISIT : Add asserts about various flags */
1116 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1117 "dev reset abts cmpl recd. id %x status %s\n",
1118 id, fnic_fcpio_status_to_str(hdr_status));
1119 fnic_priv(cmd: sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
1120 fnic_priv(cmd: sc)->abts_status = hdr_status;
1121 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_DONE;
1122 if (io_req->abts_done)
1123 complete(io_req->abts_done);
1124 spin_unlock_irqrestore(lock: io_lock, flags);
1125 } else if (id & FNIC_TAG_ABORT) {
1126 /* Completion of abort cmd */
1127 switch (hdr_status) {
1128 case FCPIO_SUCCESS:
1129 break;
1130 case FCPIO_TIMEOUT:
1131 if (fnic_priv(cmd: sc)->flags & FNIC_IO_ABTS_ISSUED)
1132 atomic64_inc(v: &abts_stats->abort_fw_timeouts);
1133 else
1134 atomic64_inc(
1135 v: &term_stats->terminate_fw_timeouts);
1136 break;
1137 case FCPIO_ITMF_REJECTED:
1138 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1139 "abort reject recd. id %d\n",
1140 (int)(id & FNIC_TAG_MASK));
1141 break;
1142 case FCPIO_IO_NOT_FOUND:
1143 if (fnic_priv(cmd: sc)->flags & FNIC_IO_ABTS_ISSUED)
1144 atomic64_inc(v: &abts_stats->abort_io_not_found);
1145 else
1146 atomic64_inc(
1147 v: &term_stats->terminate_io_not_found);
1148 break;
1149 default:
1150 if (fnic_priv(cmd: sc)->flags & FNIC_IO_ABTS_ISSUED)
1151 atomic64_inc(v: &abts_stats->abort_failures);
1152 else
1153 atomic64_inc(
1154 v: &term_stats->terminate_failures);
1155 break;
1156 }
1157 if (fnic_priv(cmd: sc)->state != FNIC_IOREQ_ABTS_PENDING) {
1158 /* This is a late completion. Ignore it */
1159 spin_unlock_irqrestore(lock: io_lock, flags);
1160 return;
1161 }
1162
1163 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABT_TERM_DONE;
1164 fnic_priv(cmd: sc)->abts_status = hdr_status;
1165
1166 /* If the status is IO not found consider it as success */
1167 if (hdr_status == FCPIO_IO_NOT_FOUND)
1168 fnic_priv(cmd: sc)->abts_status = FCPIO_SUCCESS;
1169
1170 if (!(fnic_priv(cmd: sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE)))
1171 atomic64_inc(v: &misc_stats->no_icmnd_itmf_cmpls);
1172
1173 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1174 "abts cmpl recd. id %d status %s\n",
1175 (int)(id & FNIC_TAG_MASK),
1176 fnic_fcpio_status_to_str(hdr_status));
1177
1178 /*
1179 * If scsi_eh thread is blocked waiting for abts to complete,
1180 * signal completion to it. IO will be cleaned in the thread
1181 * else clean it in this context
1182 */
1183 if (io_req->abts_done) {
1184 complete(io_req->abts_done);
1185 spin_unlock_irqrestore(lock: io_lock, flags);
1186 } else {
1187 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1188 "abts cmpl, completing IO\n");
1189 fnic_priv(cmd: sc)->io_req = NULL;
1190 sc->result = (DID_ERROR << 16);
1191
1192 spin_unlock_irqrestore(lock: io_lock, flags);
1193
1194 fnic_release_ioreq_buf(fnic, io_req, sc);
1195 mempool_free(element: io_req, pool: fnic->io_req_pool);
1196 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1197 sc->device->host->host_no, id,
1198 sc,
1199 jiffies_to_msecs(jiffies - start_time),
1200 desc,
1201 (((u64)hdr_status << 40) |
1202 (u64)sc->cmnd[0] << 32 |
1203 (u64)sc->cmnd[2] << 24 |
1204 (u64)sc->cmnd[3] << 16 |
1205 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1206 fnic_flags_and_state(sc));
1207 scsi_done(cmd: sc);
1208 atomic64_dec(v: &fnic_stats->io_stats.active_ios);
1209 if (atomic64_read(v: &fnic->io_cmpl_skip))
1210 atomic64_dec(v: &fnic->io_cmpl_skip);
1211 else
1212 atomic64_inc(v: &fnic_stats->io_stats.io_completions);
1213 }
1214 } else if (id & FNIC_TAG_DEV_RST) {
1215 /* Completion of device reset */
1216 fnic_priv(cmd: sc)->lr_status = hdr_status;
1217 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING) {
1218 spin_unlock_irqrestore(lock: io_lock, flags);
1219 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_ABTS_PENDING;
1220 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1221 sc->device->host->host_no, id, sc,
1222 jiffies_to_msecs(jiffies - start_time),
1223 desc, 0, fnic_flags_and_state(sc));
1224 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1225 "Terminate pending "
1226 "dev reset cmpl recd. id %d status %s\n",
1227 (int)(id & FNIC_TAG_MASK),
1228 fnic_fcpio_status_to_str(hdr_status));
1229 return;
1230 }
1231 if (fnic_priv(cmd: sc)->flags & FNIC_DEV_RST_TIMED_OUT) {
1232 /* Need to wait for terminate completion */
1233 spin_unlock_irqrestore(lock: io_lock, flags);
1234 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler,
1235 sc->device->host->host_no, id, sc,
1236 jiffies_to_msecs(jiffies - start_time),
1237 desc, 0, fnic_flags_and_state(sc));
1238 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1239 "dev reset cmpl recd after time out. "
1240 "id %d status %s\n",
1241 (int)(id & FNIC_TAG_MASK),
1242 fnic_fcpio_status_to_str(hdr_status));
1243 return;
1244 }
1245 fnic_priv(cmd: sc)->state = FNIC_IOREQ_CMD_COMPLETE;
1246 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_DONE;
1247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1248 "dev reset cmpl recd. id %d status %s\n",
1249 (int)(id & FNIC_TAG_MASK),
1250 fnic_fcpio_status_to_str(hdr_status));
1251 if (io_req->dr_done)
1252 complete(io_req->dr_done);
1253 spin_unlock_irqrestore(lock: io_lock, flags);
1254
1255 } else {
1256 shost_printk(KERN_ERR, fnic->lport->host,
1257 "Unexpected itmf io state %s tag %x\n",
1258 fnic_ioreq_state_to_str(fnic_priv(sc)->state), id);
1259 spin_unlock_irqrestore(lock: io_lock, flags);
1260 }
1261
1262}
1263
1264/*
1265 * fnic_fcpio_cmpl_handler
1266 * Routine to service the cq for wq_copy
1267 */
1268static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
1269 unsigned int cq_index,
1270 struct fcpio_fw_req *desc)
1271{
1272 struct fnic *fnic = vnic_dev_priv(vdev);
1273
1274 switch (desc->hdr.type) {
1275 case FCPIO_ICMND_CMPL: /* fw completed a command */
1276 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1277 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1278 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1279 case FCPIO_RESET_CMPL: /* fw completed reset */
1280 atomic64_dec(v: &fnic->fnic_stats.fw_stats.active_fw_reqs);
1281 break;
1282 default:
1283 break;
1284 }
1285
1286 switch (desc->hdr.type) {
1287 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
1288 fnic_fcpio_ack_handler(fnic, cq_index, desc);
1289 break;
1290
1291 case FCPIO_ICMND_CMPL: /* fw completed a command */
1292 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
1293 break;
1294
1295 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
1296 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
1297 break;
1298
1299 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
1300 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
1301 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
1302 break;
1303
1304 case FCPIO_RESET_CMPL: /* fw completed reset */
1305 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
1306 break;
1307
1308 default:
1309 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1310 "firmware completion type %d\n",
1311 desc->hdr.type);
1312 break;
1313 }
1314
1315 return 0;
1316}
1317
1318/*
1319 * fnic_wq_copy_cmpl_handler
1320 * Routine to process wq copy
1321 */
1322int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
1323{
1324 unsigned int wq_work_done = 0;
1325 unsigned int i, cq_index;
1326 unsigned int cur_work_done;
1327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1328 u64 start_jiffies = 0;
1329 u64 end_jiffies = 0;
1330 u64 delta_jiffies = 0;
1331 u64 delta_ms = 0;
1332
1333 for (i = 0; i < fnic->wq_copy_count; i++) {
1334 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
1335
1336 start_jiffies = jiffies;
1337 cur_work_done = vnic_cq_copy_service(cq: &fnic->cq[cq_index],
1338 q_service: fnic_fcpio_cmpl_handler,
1339 work_to_do: copy_work_to_do);
1340 end_jiffies = jiffies;
1341
1342 wq_work_done += cur_work_done;
1343 delta_jiffies = end_jiffies - start_jiffies;
1344 if (delta_jiffies >
1345 (u64) atomic64_read(v: &misc_stats->max_isr_jiffies)) {
1346 atomic64_set(v: &misc_stats->max_isr_jiffies,
1347 i: delta_jiffies);
1348 delta_ms = jiffies_to_msecs(j: delta_jiffies);
1349 atomic64_set(v: &misc_stats->max_isr_time_ms, i: delta_ms);
1350 atomic64_set(v: &misc_stats->corr_work_done,
1351 i: cur_work_done);
1352 }
1353 }
1354 return wq_work_done;
1355}
1356
1357static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data)
1358{
1359 const int tag = scsi_cmd_to_rq(scmd: sc)->tag;
1360 struct fnic *fnic = data;
1361 struct fnic_io_req *io_req;
1362 unsigned long flags = 0;
1363 spinlock_t *io_lock;
1364 unsigned long start_time = 0;
1365 struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1366
1367 io_lock = fnic_io_lock_tag(fnic, tag);
1368 spin_lock_irqsave(io_lock, flags);
1369
1370 io_req = fnic_priv(cmd: sc)->io_req;
1371 if ((fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET) &&
1372 !(fnic_priv(cmd: sc)->flags & FNIC_DEV_RST_DONE)) {
1373 /*
1374 * We will be here only when FW completes reset
1375 * without sending completions for outstanding ios.
1376 */
1377 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_DONE;
1378 if (io_req && io_req->dr_done)
1379 complete(io_req->dr_done);
1380 else if (io_req && io_req->abts_done)
1381 complete(io_req->abts_done);
1382 spin_unlock_irqrestore(lock: io_lock, flags);
1383 return true;
1384 } else if (fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET) {
1385 spin_unlock_irqrestore(lock: io_lock, flags);
1386 return true;
1387 }
1388 if (!io_req) {
1389 spin_unlock_irqrestore(lock: io_lock, flags);
1390 goto cleanup_scsi_cmd;
1391 }
1392
1393 fnic_priv(cmd: sc)->io_req = NULL;
1394
1395 spin_unlock_irqrestore(lock: io_lock, flags);
1396
1397 /*
1398 * If there is a scsi_cmnd associated with this io_req, then
1399 * free the corresponding state
1400 */
1401 start_time = io_req->start_time;
1402 fnic_release_ioreq_buf(fnic, io_req, sc);
1403 mempool_free(element: io_req, pool: fnic->io_req_pool);
1404
1405cleanup_scsi_cmd:
1406 sc->result = DID_TRANSPORT_DISRUPTED << 16;
1407 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1408 "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",
1409 tag, sc, jiffies - start_time);
1410
1411 if (atomic64_read(v: &fnic->io_cmpl_skip))
1412 atomic64_dec(v: &fnic->io_cmpl_skip);
1413 else
1414 atomic64_inc(v: &fnic_stats->io_stats.io_completions);
1415
1416 /* Complete the command to SCSI */
1417 if (!(fnic_priv(cmd: sc)->flags & FNIC_IO_ISSUED))
1418 shost_printk(KERN_ERR, fnic->lport->host,
1419 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n",
1420 tag, sc);
1421
1422 FNIC_TRACE(fnic_cleanup_io,
1423 sc->device->host->host_no, tag, sc,
1424 jiffies_to_msecs(jiffies - start_time),
1425 0, ((u64)sc->cmnd[0] << 32 |
1426 (u64)sc->cmnd[2] << 24 |
1427 (u64)sc->cmnd[3] << 16 |
1428 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1429 fnic_flags_and_state(sc));
1430
1431 scsi_done(cmd: sc);
1432
1433 return true;
1434}
1435
1436static void fnic_cleanup_io(struct fnic *fnic)
1437{
1438 scsi_host_busy_iter(fnic->lport->host,
1439 fn: fnic_cleanup_io_iter, priv: fnic);
1440}
1441
1442void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
1443 struct fcpio_host_req *desc)
1444{
1445 u32 id;
1446 struct fnic *fnic = vnic_dev_priv(vdev: wq->vdev);
1447 struct fnic_io_req *io_req;
1448 struct scsi_cmnd *sc;
1449 unsigned long flags;
1450 spinlock_t *io_lock;
1451 unsigned long start_time = 0;
1452
1453 /* get the tag reference */
1454 fcpio_tag_id_dec(tag: &desc->hdr.tag, id: &id);
1455 id &= FNIC_TAG_MASK;
1456
1457 if (id >= fnic->fnic_max_tag_id)
1458 return;
1459
1460 sc = scsi_host_find_tag(shost: fnic->lport->host, tag: id);
1461 if (!sc)
1462 return;
1463
1464 io_lock = fnic_io_lock_hash(fnic, sc);
1465 spin_lock_irqsave(io_lock, flags);
1466
1467 /* Get the IO context which this desc refers to */
1468 io_req = fnic_priv(cmd: sc)->io_req;
1469
1470 /* fnic interrupts are turned off by now */
1471
1472 if (!io_req) {
1473 spin_unlock_irqrestore(lock: io_lock, flags);
1474 goto wq_copy_cleanup_scsi_cmd;
1475 }
1476
1477 fnic_priv(cmd: sc)->io_req = NULL;
1478
1479 spin_unlock_irqrestore(lock: io_lock, flags);
1480
1481 start_time = io_req->start_time;
1482 fnic_release_ioreq_buf(fnic, io_req, sc);
1483 mempool_free(element: io_req, pool: fnic->io_req_pool);
1484
1485wq_copy_cleanup_scsi_cmd:
1486 sc->result = DID_NO_CONNECT << 16;
1487 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1488 " DID_NO_CONNECT\n");
1489
1490 FNIC_TRACE(fnic_wq_copy_cleanup_handler,
1491 sc->device->host->host_no, id, sc,
1492 jiffies_to_msecs(jiffies - start_time),
1493 0, ((u64)sc->cmnd[0] << 32 |
1494 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1495 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1496 fnic_flags_and_state(sc));
1497
1498 scsi_done(cmd: sc);
1499}
1500
1501static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1502 u32 task_req, u8 *fc_lun,
1503 struct fnic_io_req *io_req)
1504{
1505 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1506 struct Scsi_Host *host = fnic->lport->host;
1507 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1508 unsigned long flags;
1509
1510 spin_lock_irqsave(host->host_lock, flags);
1511 if (unlikely(fnic_chk_state_flags_locked(fnic,
1512 FNIC_FLAGS_IO_BLOCKED))) {
1513 spin_unlock_irqrestore(lock: host->host_lock, flags);
1514 return 1;
1515 } else
1516 atomic_inc(v: &fnic->in_flight);
1517 spin_unlock_irqrestore(lock: host->host_lock, flags);
1518
1519 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1520
1521 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1522 free_wq_copy_descs(fnic, wq);
1523
1524 if (!vnic_wq_copy_desc_avail(wq)) {
1525 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags);
1526 atomic_dec(v: &fnic->in_flight);
1527 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1528 "fnic_queue_abort_io_req: failure: no descriptors\n");
1529 atomic64_inc(v: &misc_stats->abts_cpwq_alloc_failures);
1530 return 1;
1531 }
1532 fnic_queue_wq_copy_desc_itmf(wq, req_id: tag | FNIC_TAG_ABORT,
1533 lunmap_id: 0, tm_req: task_req, tm_id: tag, lun: fc_lun, d_id: io_req->port_id,
1534 r_a_tov: fnic->config.ra_tov, e_d_tov: fnic->config.ed_tov);
1535
1536 atomic64_inc(v: &fnic->fnic_stats.fw_stats.active_fw_reqs);
1537 if (atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs) >
1538 atomic64_read(v: &fnic->fnic_stats.fw_stats.max_fw_reqs))
1539 atomic64_set(v: &fnic->fnic_stats.fw_stats.max_fw_reqs,
1540 i: atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs));
1541
1542 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags);
1543 atomic_dec(v: &fnic->in_flight);
1544
1545 return 0;
1546}
1547
1548struct fnic_rport_abort_io_iter_data {
1549 struct fnic *fnic;
1550 u32 port_id;
1551 int term_cnt;
1552};
1553
1554static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data)
1555{
1556 struct fnic_rport_abort_io_iter_data *iter_data = data;
1557 struct fnic *fnic = iter_data->fnic;
1558 int abt_tag = scsi_cmd_to_rq(scmd: sc)->tag;
1559 struct fnic_io_req *io_req;
1560 spinlock_t *io_lock;
1561 unsigned long flags;
1562 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats;
1563 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1564 struct scsi_lun fc_lun;
1565 enum fnic_ioreq_state old_ioreq_state;
1566
1567 io_lock = fnic_io_lock_tag(fnic, tag: abt_tag);
1568 spin_lock_irqsave(io_lock, flags);
1569
1570 io_req = fnic_priv(cmd: sc)->io_req;
1571
1572 if (!io_req || io_req->port_id != iter_data->port_id) {
1573 spin_unlock_irqrestore(lock: io_lock, flags);
1574 return true;
1575 }
1576
1577 if ((fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET) &&
1578 !(fnic_priv(cmd: sc)->flags & FNIC_DEV_RST_ISSUED)) {
1579 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1580 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n",
1581 sc);
1582 spin_unlock_irqrestore(lock: io_lock, flags);
1583 return true;
1584 }
1585
1586 /*
1587 * Found IO that is still pending with firmware and
1588 * belongs to rport that went away
1589 */
1590 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING) {
1591 spin_unlock_irqrestore(lock: io_lock, flags);
1592 return true;
1593 }
1594 if (io_req->abts_done) {
1595 shost_printk(KERN_ERR, fnic->lport->host,
1596 "fnic_rport_exch_reset: io_req->abts_done is set "
1597 "state is %s\n",
1598 fnic_ioreq_state_to_str(fnic_priv(sc)->state));
1599 }
1600
1601 if (!(fnic_priv(cmd: sc)->flags & FNIC_IO_ISSUED)) {
1602 shost_printk(KERN_ERR, fnic->lport->host,
1603 "rport_exch_reset "
1604 "IO not yet issued %p tag 0x%x flags "
1605 "%x state %d\n",
1606 sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state);
1607 }
1608 old_ioreq_state = fnic_priv(cmd: sc)->state;
1609 fnic_priv(cmd: sc)->state = FNIC_IOREQ_ABTS_PENDING;
1610 fnic_priv(cmd: sc)->abts_status = FCPIO_INVALID_CODE;
1611 if (fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET) {
1612 atomic64_inc(v: &reset_stats->device_reset_terminates);
1613 abt_tag |= FNIC_TAG_DEV_RST;
1614 }
1615 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1616 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc);
1617 BUG_ON(io_req->abts_done);
1618
1619 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1620 "fnic_rport_reset_exch: Issuing abts\n");
1621
1622 spin_unlock_irqrestore(lock: io_lock, flags);
1623
1624 /* Now queue the abort command to firmware */
1625 int_to_scsilun(sc->device->lun, &fc_lun);
1626
1627 if (fnic_queue_abort_io_req(fnic, tag: abt_tag,
1628 task_req: FCPIO_ITMF_ABT_TASK_TERM,
1629 fc_lun: fc_lun.scsi_lun, io_req)) {
1630 /*
1631 * Revert the cmd state back to old state, if
1632 * it hasn't changed in between. This cmd will get
1633 * aborted later by scsi_eh, or cleaned up during
1634 * lun reset
1635 */
1636 spin_lock_irqsave(io_lock, flags);
1637 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING)
1638 fnic_priv(cmd: sc)->state = old_ioreq_state;
1639 spin_unlock_irqrestore(lock: io_lock, flags);
1640 } else {
1641 spin_lock_irqsave(io_lock, flags);
1642 if (fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET)
1643 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
1644 else
1645 fnic_priv(cmd: sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;
1646 spin_unlock_irqrestore(lock: io_lock, flags);
1647 atomic64_inc(v: &term_stats->terminates);
1648 iter_data->term_cnt++;
1649 }
1650 return true;
1651}
1652
1653static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1654{
1655 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
1656 struct fnic_rport_abort_io_iter_data iter_data = {
1657 .fnic = fnic,
1658 .port_id = port_id,
1659 .term_cnt = 0,
1660 };
1661
1662 FNIC_SCSI_DBG(KERN_DEBUG,
1663 fnic->lport->host,
1664 "fnic_rport_exch_reset called portid 0x%06x\n",
1665 port_id);
1666
1667 if (fnic->in_remove)
1668 return;
1669
1670 scsi_host_busy_iter(fnic->lport->host, fn: fnic_rport_abort_io_iter,
1671 priv: &iter_data);
1672 if (iter_data.term_cnt > atomic64_read(v: &term_stats->max_terminates))
1673 atomic64_set(v: &term_stats->max_terminates, i: iter_data.term_cnt);
1674
1675}
1676
1677void fnic_terminate_rport_io(struct fc_rport *rport)
1678{
1679 struct fc_rport_libfc_priv *rdata;
1680 struct fc_lport *lport;
1681 struct fnic *fnic;
1682
1683 if (!rport) {
1684 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
1685 return;
1686 }
1687 rdata = rport->dd_data;
1688
1689 if (!rdata) {
1690 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
1691 return;
1692 }
1693 lport = rdata->local_port;
1694
1695 if (!lport) {
1696 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
1697 return;
1698 }
1699 fnic = lport_priv(lport);
1700 FNIC_SCSI_DBG(KERN_DEBUG,
1701 fnic->lport->host, "fnic_terminate_rport_io called"
1702 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",
1703 rport->port_name, rport->node_name, rport,
1704 rport->port_id);
1705
1706 if (fnic->in_remove)
1707 return;
1708
1709 fnic_rport_exch_reset(fnic, port_id: rport->port_id);
1710}
1711
1712/*
1713 * This function is exported to SCSI for sending abort cmnds.
1714 * A SCSI IO is represented by a io_req in the driver.
1715 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1716 */
1717int fnic_abort_cmd(struct scsi_cmnd *sc)
1718{
1719 struct request *const rq = scsi_cmd_to_rq(scmd: sc);
1720 struct fc_lport *lp;
1721 struct fnic *fnic;
1722 struct fnic_io_req *io_req = NULL;
1723 struct fc_rport *rport;
1724 spinlock_t *io_lock;
1725 unsigned long flags;
1726 unsigned long start_time = 0;
1727 int ret = SUCCESS;
1728 u32 task_req = 0;
1729 struct scsi_lun fc_lun;
1730 struct fnic_stats *fnic_stats;
1731 struct abort_stats *abts_stats;
1732 struct terminate_stats *term_stats;
1733 enum fnic_ioreq_state old_ioreq_state;
1734 const int tag = rq->tag;
1735 unsigned long abt_issued_time;
1736 DECLARE_COMPLETION_ONSTACK(tm_done);
1737
1738 /* Wait for rport to unblock */
1739 fc_block_scsi_eh(cmnd: sc);
1740
1741 /* Get local-port, check ready and link up */
1742 lp = shost_priv(shost: sc->device->host);
1743
1744 fnic = lport_priv(lport: lp);
1745 fnic_stats = &fnic->fnic_stats;
1746 abts_stats = &fnic->fnic_stats.abts_stats;
1747 term_stats = &fnic->fnic_stats.term_stats;
1748
1749 rport = starget_to_rport(scsi_target(sc->device));
1750 FNIC_SCSI_DBG(KERN_DEBUG,
1751 fnic->lport->host,
1752 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n",
1753 rport->port_id, sc->device->lun, tag, fnic_priv(sc)->flags);
1754
1755 fnic_priv(cmd: sc)->flags = FNIC_NO_FLAGS;
1756
1757 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1758 ret = FAILED;
1759 goto fnic_abort_cmd_end;
1760 }
1761
1762 /*
1763 * Avoid a race between SCSI issuing the abort and the device
1764 * completing the command.
1765 *
1766 * If the command is already completed by the fw cmpl code,
1767 * we just return SUCCESS from here. This means that the abort
1768 * succeeded. In the SCSI ML, since the timeout for command has
1769 * happened, the completion wont actually complete the command
1770 * and it will be considered as an aborted command
1771 *
1772 * .io_req will not be cleared except while holding io_req_lock.
1773 */
1774 io_lock = fnic_io_lock_hash(fnic, sc);
1775 spin_lock_irqsave(io_lock, flags);
1776 io_req = fnic_priv(cmd: sc)->io_req;
1777 if (!io_req) {
1778 spin_unlock_irqrestore(lock: io_lock, flags);
1779 goto fnic_abort_cmd_end;
1780 }
1781
1782 io_req->abts_done = &tm_done;
1783
1784 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING) {
1785 spin_unlock_irqrestore(lock: io_lock, flags);
1786 goto wait_pending;
1787 }
1788
1789 abt_issued_time = jiffies_to_msecs(j: jiffies) - jiffies_to_msecs(j: io_req->start_time);
1790 if (abt_issued_time <= 6000)
1791 atomic64_inc(v: &abts_stats->abort_issued_btw_0_to_6_sec);
1792 else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
1793 atomic64_inc(v: &abts_stats->abort_issued_btw_6_to_20_sec);
1794 else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
1795 atomic64_inc(v: &abts_stats->abort_issued_btw_20_to_30_sec);
1796 else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
1797 atomic64_inc(v: &abts_stats->abort_issued_btw_30_to_40_sec);
1798 else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
1799 atomic64_inc(v: &abts_stats->abort_issued_btw_40_to_50_sec);
1800 else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
1801 atomic64_inc(v: &abts_stats->abort_issued_btw_50_to_60_sec);
1802 else
1803 atomic64_inc(v: &abts_stats->abort_issued_greater_than_60_sec);
1804
1805 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
1806 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time);
1807 /*
1808 * Command is still pending, need to abort it
1809 * If the firmware completes the command after this point,
1810 * the completion wont be done till mid-layer, since abort
1811 * has already started.
1812 */
1813 old_ioreq_state = fnic_priv(cmd: sc)->state;
1814 fnic_priv(cmd: sc)->state = FNIC_IOREQ_ABTS_PENDING;
1815 fnic_priv(cmd: sc)->abts_status = FCPIO_INVALID_CODE;
1816
1817 spin_unlock_irqrestore(lock: io_lock, flags);
1818
1819 /*
1820 * Check readiness of the remote port. If the path to remote
1821 * port is up, then send abts to the remote port to terminate
1822 * the IO. Else, just locally terminate the IO in the firmware
1823 */
1824 if (fc_remote_port_chkready(rport) == 0)
1825 task_req = FCPIO_ITMF_ABT_TASK;
1826 else {
1827 atomic64_inc(v: &fnic_stats->misc_stats.rport_not_ready);
1828 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1829 }
1830
1831 /* Now queue the abort command to firmware */
1832 int_to_scsilun(sc->device->lun, &fc_lun);
1833
1834 if (fnic_queue_abort_io_req(fnic, tag, task_req, fc_lun: fc_lun.scsi_lun,
1835 io_req)) {
1836 spin_lock_irqsave(io_lock, flags);
1837 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING)
1838 fnic_priv(cmd: sc)->state = old_ioreq_state;
1839 io_req = fnic_priv(cmd: sc)->io_req;
1840 if (io_req)
1841 io_req->abts_done = NULL;
1842 spin_unlock_irqrestore(lock: io_lock, flags);
1843 ret = FAILED;
1844 goto fnic_abort_cmd_end;
1845 }
1846 if (task_req == FCPIO_ITMF_ABT_TASK) {
1847 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABTS_ISSUED;
1848 atomic64_inc(v: &fnic_stats->abts_stats.aborts);
1849 } else {
1850 fnic_priv(cmd: sc)->flags |= FNIC_IO_TERM_ISSUED;
1851 atomic64_inc(v: &fnic_stats->term_stats.terminates);
1852 }
1853
1854 /*
1855 * We queued an abort IO, wait for its completion.
1856 * Once the firmware completes the abort command, it will
1857 * wake up this thread.
1858 */
1859 wait_pending:
1860 wait_for_completion_timeout(x: &tm_done,
1861 timeout: msecs_to_jiffies
1862 (m: 2 * fnic->config.ra_tov +
1863 fnic->config.ed_tov));
1864
1865 /* Check the abort status */
1866 spin_lock_irqsave(io_lock, flags);
1867
1868 io_req = fnic_priv(cmd: sc)->io_req;
1869 if (!io_req) {
1870 atomic64_inc(v: &fnic_stats->io_stats.ioreq_null);
1871 spin_unlock_irqrestore(lock: io_lock, flags);
1872 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
1873 ret = FAILED;
1874 goto fnic_abort_cmd_end;
1875 }
1876 io_req->abts_done = NULL;
1877
1878 /* fw did not complete abort, timed out */
1879 if (fnic_priv(cmd: sc)->abts_status == FCPIO_INVALID_CODE) {
1880 spin_unlock_irqrestore(lock: io_lock, flags);
1881 if (task_req == FCPIO_ITMF_ABT_TASK) {
1882 atomic64_inc(v: &abts_stats->abort_drv_timeouts);
1883 } else {
1884 atomic64_inc(v: &term_stats->terminate_drv_timeouts);
1885 }
1886 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABT_TERM_TIMED_OUT;
1887 ret = FAILED;
1888 goto fnic_abort_cmd_end;
1889 }
1890
1891 /* IO out of order */
1892
1893 if (!(fnic_priv(cmd: sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
1894 spin_unlock_irqrestore(lock: io_lock, flags);
1895 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1896 "Issuing Host reset due to out of order IO\n");
1897
1898 ret = FAILED;
1899 goto fnic_abort_cmd_end;
1900 }
1901
1902 fnic_priv(cmd: sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
1903
1904 start_time = io_req->start_time;
1905 /*
1906 * firmware completed the abort, check the status,
1907 * free the io_req if successful. If abort fails,
1908 * Device reset will clean the I/O.
1909 */
1910 if (fnic_priv(cmd: sc)->abts_status == FCPIO_SUCCESS) {
1911 fnic_priv(cmd: sc)->io_req = NULL;
1912 } else {
1913 ret = FAILED;
1914 spin_unlock_irqrestore(lock: io_lock, flags);
1915 goto fnic_abort_cmd_end;
1916 }
1917
1918 spin_unlock_irqrestore(lock: io_lock, flags);
1919
1920 fnic_release_ioreq_buf(fnic, io_req, sc);
1921 mempool_free(element: io_req, pool: fnic->io_req_pool);
1922
1923 /* Call SCSI completion function to complete the IO */
1924 sc->result = DID_ABORT << 16;
1925 scsi_done(cmd: sc);
1926 atomic64_dec(v: &fnic_stats->io_stats.active_ios);
1927 if (atomic64_read(v: &fnic->io_cmpl_skip))
1928 atomic64_dec(v: &fnic->io_cmpl_skip);
1929 else
1930 atomic64_inc(v: &fnic_stats->io_stats.io_completions);
1931
1932fnic_abort_cmd_end:
1933 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, tag, sc,
1934 jiffies_to_msecs(jiffies - start_time),
1935 0, ((u64)sc->cmnd[0] << 32 |
1936 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
1937 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
1938 fnic_flags_and_state(sc));
1939
1940 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1941 "Returning from abort cmd type %x %s\n", task_req,
1942 (ret == SUCCESS) ?
1943 "SUCCESS" : "FAILED");
1944 return ret;
1945}
1946
1947static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1948 struct scsi_cmnd *sc,
1949 struct fnic_io_req *io_req)
1950{
1951 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1952 struct Scsi_Host *host = fnic->lport->host;
1953 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
1954 struct scsi_lun fc_lun;
1955 int ret = 0;
1956 unsigned long intr_flags;
1957 unsigned int tag = scsi_cmd_to_rq(scmd: sc)->tag;
1958
1959 if (tag == SCSI_NO_TAG)
1960 tag = io_req->tag;
1961
1962 spin_lock_irqsave(host->host_lock, intr_flags);
1963 if (unlikely(fnic_chk_state_flags_locked(fnic,
1964 FNIC_FLAGS_IO_BLOCKED))) {
1965 spin_unlock_irqrestore(lock: host->host_lock, flags: intr_flags);
1966 return FAILED;
1967 } else
1968 atomic_inc(v: &fnic->in_flight);
1969 spin_unlock_irqrestore(lock: host->host_lock, flags: intr_flags);
1970
1971 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1972
1973 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1974 free_wq_copy_descs(fnic, wq);
1975
1976 if (!vnic_wq_copy_desc_avail(wq)) {
1977 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1978 "queue_dr_io_req failure - no descriptors\n");
1979 atomic64_inc(v: &misc_stats->devrst_cpwq_alloc_failures);
1980 ret = -EAGAIN;
1981 goto lr_io_req_end;
1982 }
1983
1984 /* fill in the lun info */
1985 int_to_scsilun(sc->device->lun, &fc_lun);
1986
1987 tag |= FNIC_TAG_DEV_RST;
1988 fnic_queue_wq_copy_desc_itmf(wq, req_id: tag,
1989 lunmap_id: 0, tm_req: FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1990 lun: fc_lun.scsi_lun, d_id: io_req->port_id,
1991 r_a_tov: fnic->config.ra_tov, e_d_tov: fnic->config.ed_tov);
1992
1993 atomic64_inc(v: &fnic->fnic_stats.fw_stats.active_fw_reqs);
1994 if (atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs) >
1995 atomic64_read(v: &fnic->fnic_stats.fw_stats.max_fw_reqs))
1996 atomic64_set(v: &fnic->fnic_stats.fw_stats.max_fw_reqs,
1997 i: atomic64_read(v: &fnic->fnic_stats.fw_stats.active_fw_reqs));
1998
1999lr_io_req_end:
2000 spin_unlock_irqrestore(lock: &fnic->wq_copy_lock[0], flags: intr_flags);
2001 atomic_dec(v: &fnic->in_flight);
2002
2003 return ret;
2004}
2005
2006struct fnic_pending_aborts_iter_data {
2007 struct fnic *fnic;
2008 struct scsi_cmnd *lr_sc;
2009 struct scsi_device *lun_dev;
2010 int ret;
2011};
2012
2013static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, void *data)
2014{
2015 struct fnic_pending_aborts_iter_data *iter_data = data;
2016 struct fnic *fnic = iter_data->fnic;
2017 struct scsi_device *lun_dev = iter_data->lun_dev;
2018 int abt_tag = scsi_cmd_to_rq(scmd: sc)->tag;
2019 struct fnic_io_req *io_req;
2020 spinlock_t *io_lock;
2021 unsigned long flags;
2022 struct scsi_lun fc_lun;
2023 DECLARE_COMPLETION_ONSTACK(tm_done);
2024 enum fnic_ioreq_state old_ioreq_state;
2025
2026 if (sc == iter_data->lr_sc || sc->device != lun_dev)
2027 return true;
2028
2029 io_lock = fnic_io_lock_tag(fnic, tag: abt_tag);
2030 spin_lock_irqsave(io_lock, flags);
2031 io_req = fnic_priv(cmd: sc)->io_req;
2032 if (!io_req) {
2033 spin_unlock_irqrestore(lock: io_lock, flags);
2034 return true;
2035 }
2036
2037 /*
2038 * Found IO that is still pending with firmware and
2039 * belongs to the LUN that we are resetting
2040 */
2041 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2042 "Found IO in %s on lun\n",
2043 fnic_ioreq_state_to_str(fnic_priv(sc)->state));
2044
2045 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING) {
2046 spin_unlock_irqrestore(lock: io_lock, flags);
2047 return true;
2048 }
2049 if ((fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET) &&
2050 (!(fnic_priv(cmd: sc)->flags & FNIC_DEV_RST_ISSUED))) {
2051 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2052 "%s dev rst not pending sc 0x%p\n", __func__,
2053 sc);
2054 spin_unlock_irqrestore(lock: io_lock, flags);
2055 return true;
2056 }
2057
2058 if (io_req->abts_done)
2059 shost_printk(KERN_ERR, fnic->lport->host,
2060 "%s: io_req->abts_done is set state is %s\n",
2061 __func__, fnic_ioreq_state_to_str(fnic_priv(sc)->state));
2062 old_ioreq_state = fnic_priv(cmd: sc)->state;
2063 /*
2064 * Any pending IO issued prior to reset is expected to be
2065 * in abts pending state, if not we need to set
2066 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending.
2067 * When IO is completed, the IO will be handed over and
2068 * handled in this function.
2069 */
2070 fnic_priv(cmd: sc)->state = FNIC_IOREQ_ABTS_PENDING;
2071
2072 BUG_ON(io_req->abts_done);
2073
2074 if (fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET) {
2075 abt_tag |= FNIC_TAG_DEV_RST;
2076 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2077 "%s: dev rst sc 0x%p\n", __func__, sc);
2078 }
2079
2080 fnic_priv(cmd: sc)->abts_status = FCPIO_INVALID_CODE;
2081 io_req->abts_done = &tm_done;
2082 spin_unlock_irqrestore(lock: io_lock, flags);
2083
2084 /* Now queue the abort command to firmware */
2085 int_to_scsilun(sc->device->lun, &fc_lun);
2086
2087 if (fnic_queue_abort_io_req(fnic, tag: abt_tag,
2088 task_req: FCPIO_ITMF_ABT_TASK_TERM,
2089 fc_lun: fc_lun.scsi_lun, io_req)) {
2090 spin_lock_irqsave(io_lock, flags);
2091 io_req = fnic_priv(cmd: sc)->io_req;
2092 if (io_req)
2093 io_req->abts_done = NULL;
2094 if (fnic_priv(cmd: sc)->state == FNIC_IOREQ_ABTS_PENDING)
2095 fnic_priv(cmd: sc)->state = old_ioreq_state;
2096 spin_unlock_irqrestore(lock: io_lock, flags);
2097 iter_data->ret = FAILED;
2098 return false;
2099 } else {
2100 spin_lock_irqsave(io_lock, flags);
2101 if (fnic_priv(cmd: sc)->flags & FNIC_DEVICE_RESET)
2102 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
2103 spin_unlock_irqrestore(lock: io_lock, flags);
2104 }
2105 fnic_priv(cmd: sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED;
2106
2107 wait_for_completion_timeout(x: &tm_done, timeout: msecs_to_jiffies
2108 (m: fnic->config.ed_tov));
2109
2110 /* Recheck cmd state to check if it is now aborted */
2111 spin_lock_irqsave(io_lock, flags);
2112 io_req = fnic_priv(cmd: sc)->io_req;
2113 if (!io_req) {
2114 spin_unlock_irqrestore(lock: io_lock, flags);
2115 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL;
2116 return true;
2117 }
2118
2119 io_req->abts_done = NULL;
2120
2121 /* if abort is still pending with fw, fail */
2122 if (fnic_priv(cmd: sc)->abts_status == FCPIO_INVALID_CODE) {
2123 spin_unlock_irqrestore(lock: io_lock, flags);
2124 fnic_priv(cmd: sc)->flags |= FNIC_IO_ABT_TERM_DONE;
2125 iter_data->ret = FAILED;
2126 return false;
2127 }
2128 fnic_priv(cmd: sc)->state = FNIC_IOREQ_ABTS_COMPLETE;
2129
2130 /* original sc used for lr is handled by dev reset code */
2131 if (sc != iter_data->lr_sc)
2132 fnic_priv(cmd: sc)->io_req = NULL;
2133 spin_unlock_irqrestore(lock: io_lock, flags);
2134
2135 /* original sc used for lr is handled by dev reset code */
2136 if (sc != iter_data->lr_sc) {
2137 fnic_release_ioreq_buf(fnic, io_req, sc);
2138 mempool_free(element: io_req, pool: fnic->io_req_pool);
2139 }
2140
2141 /*
2142 * Any IO is returned during reset, it needs to call scsi_done
2143 * to return the scsi_cmnd to upper layer.
2144 */
2145 /* Set result to let upper SCSI layer retry */
2146 sc->result = DID_RESET << 16;
2147 scsi_done(cmd: sc);
2148
2149 return true;
2150}
2151
2152/*
2153 * Clean up any pending aborts on the lun
2154 * For each outstanding IO on this lun, whose abort is not completed by fw,
2155 * issue a local abort. Wait for abort to complete. Return 0 if all commands
2156 * successfully aborted, 1 otherwise
2157 */
2158static int fnic_clean_pending_aborts(struct fnic *fnic,
2159 struct scsi_cmnd *lr_sc,
2160 bool new_sc)
2161
2162{
2163 int ret = 0;
2164 struct fnic_pending_aborts_iter_data iter_data = {
2165 .fnic = fnic,
2166 .lun_dev = lr_sc->device,
2167 .ret = SUCCESS,
2168 };
2169
2170 iter_data.lr_sc = lr_sc;
2171
2172 scsi_host_busy_iter(fnic->lport->host,
2173 fn: fnic_pending_aborts_iter, priv: &iter_data);
2174 if (iter_data.ret == FAILED) {
2175 ret = iter_data.ret;
2176 goto clean_pending_aborts_end;
2177 }
2178 schedule_timeout(timeout: msecs_to_jiffies(m: 2 * fnic->config.ed_tov));
2179
2180 /* walk again to check, if IOs are still pending in fw */
2181 if (fnic_is_abts_pending(fnic, lr_sc))
2182 ret = 1;
2183
2184clean_pending_aborts_end:
2185 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2186 "%s: exit status: %d\n", __func__, ret);
2187 return ret;
2188}
2189
2190/*
2191 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
2192 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
2193 * on the LUN.
2194 */
2195int fnic_device_reset(struct scsi_cmnd *sc)
2196{
2197 struct request *rq = scsi_cmd_to_rq(scmd: sc);
2198 struct fc_lport *lp;
2199 struct fnic *fnic;
2200 struct fnic_io_req *io_req = NULL;
2201 struct fc_rport *rport;
2202 int status;
2203 int ret = FAILED;
2204 spinlock_t *io_lock;
2205 unsigned long flags;
2206 unsigned long start_time = 0;
2207 struct scsi_lun fc_lun;
2208 struct fnic_stats *fnic_stats;
2209 struct reset_stats *reset_stats;
2210 int tag = rq->tag;
2211 DECLARE_COMPLETION_ONSTACK(tm_done);
2212 bool new_sc = 0;
2213
2214 /* Wait for rport to unblock */
2215 fc_block_scsi_eh(cmnd: sc);
2216
2217 /* Get local-port, check ready and link up */
2218 lp = shost_priv(shost: sc->device->host);
2219
2220 fnic = lport_priv(lport: lp);
2221 fnic_stats = &fnic->fnic_stats;
2222 reset_stats = &fnic->fnic_stats.reset_stats;
2223
2224 atomic64_inc(v: &reset_stats->device_resets);
2225
2226 rport = starget_to_rport(scsi_target(sc->device));
2227 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2228 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n",
2229 rport->port_id, sc->device->lun, sc);
2230
2231 if (lp->state != LPORT_ST_READY || !(lp->link_up))
2232 goto fnic_device_reset_end;
2233
2234 /* Check if remote port up */
2235 if (fc_remote_port_chkready(rport)) {
2236 atomic64_inc(v: &fnic_stats->misc_stats.rport_not_ready);
2237 goto fnic_device_reset_end;
2238 }
2239
2240 fnic_priv(cmd: sc)->flags = FNIC_DEVICE_RESET;
2241
2242 if (unlikely(tag < 0)) {
2243 /*
2244 * For device reset issued through sg3utils, we let
2245 * only one LUN_RESET to go through and use a special
2246 * tag equal to max_tag_id so that we don't have to allocate
2247 * or free it. It won't interact with tags
2248 * allocated by mid layer.
2249 */
2250 mutex_lock(&fnic->sgreset_mutex);
2251 tag = fnic->fnic_max_tag_id;
2252 new_sc = 1;
2253 fnic->sgreset_sc = sc;
2254 io_lock = &fnic->sgreset_lock;
2255 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2256 "fcid: 0x%x lun: 0x%llx flags: 0x%x tag: 0x%x Issuing sgreset\n",
2257 rport->port_id, sc->device->lun, fnic_priv(sc)->flags, tag);
2258 } else
2259 io_lock = fnic_io_lock_hash(fnic, sc);
2260
2261 spin_lock_irqsave(io_lock, flags);
2262 io_req = fnic_priv(cmd: sc)->io_req;
2263
2264 /*
2265 * If there is a io_req attached to this command, then use it,
2266 * else allocate a new one.
2267 */
2268 if (!io_req) {
2269 io_req = mempool_alloc(pool: fnic->io_req_pool, GFP_ATOMIC);
2270 if (!io_req) {
2271 spin_unlock_irqrestore(lock: io_lock, flags);
2272 goto fnic_device_reset_end;
2273 }
2274 memset(io_req, 0, sizeof(*io_req));
2275 io_req->port_id = rport->port_id;
2276 io_req->tag = tag;
2277 io_req->sc = sc;
2278 fnic_priv(cmd: sc)->io_req = io_req;
2279 }
2280 io_req->dr_done = &tm_done;
2281 fnic_priv(cmd: sc)->state = FNIC_IOREQ_CMD_PENDING;
2282 fnic_priv(cmd: sc)->lr_status = FCPIO_INVALID_CODE;
2283 spin_unlock_irqrestore(lock: io_lock, flags);
2284
2285 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag);
2286
2287 /*
2288 * issue the device reset, if enqueue failed, clean up the ioreq
2289 * and break assoc with scsi cmd
2290 */
2291 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
2292 spin_lock_irqsave(io_lock, flags);
2293 io_req = fnic_priv(cmd: sc)->io_req;
2294 if (io_req)
2295 io_req->dr_done = NULL;
2296 goto fnic_device_reset_clean;
2297 }
2298 spin_lock_irqsave(io_lock, flags);
2299 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_ISSUED;
2300 spin_unlock_irqrestore(lock: io_lock, flags);
2301
2302 /*
2303 * Wait on the local completion for LUN reset. The io_req may be
2304 * freed while we wait since we hold no lock.
2305 */
2306 wait_for_completion_timeout(x: &tm_done,
2307 timeout: msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2308
2309 spin_lock_irqsave(io_lock, flags);
2310 io_req = fnic_priv(cmd: sc)->io_req;
2311 if (!io_req) {
2312 spin_unlock_irqrestore(lock: io_lock, flags);
2313 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2314 "io_req is null tag 0x%x sc 0x%p\n", tag, sc);
2315 goto fnic_device_reset_end;
2316 }
2317 io_req->dr_done = NULL;
2318
2319 status = fnic_priv(cmd: sc)->lr_status;
2320
2321 /*
2322 * If lun reset not completed, bail out with failed. io_req
2323 * gets cleaned up during higher levels of EH
2324 */
2325 if (status == FCPIO_INVALID_CODE) {
2326 atomic64_inc(v: &reset_stats->device_reset_timeouts);
2327 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2328 "Device reset timed out\n");
2329 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_TIMED_OUT;
2330 spin_unlock_irqrestore(lock: io_lock, flags);
2331 int_to_scsilun(sc->device->lun, &fc_lun);
2332 /*
2333 * Issue abort and terminate on device reset request.
2334 * If q'ing of terminate fails, retry it after a delay.
2335 */
2336 while (1) {
2337 spin_lock_irqsave(io_lock, flags);
2338 if (fnic_priv(cmd: sc)->flags & FNIC_DEV_RST_TERM_ISSUED) {
2339 spin_unlock_irqrestore(lock: io_lock, flags);
2340 break;
2341 }
2342 spin_unlock_irqrestore(lock: io_lock, flags);
2343 if (fnic_queue_abort_io_req(fnic,
2344 tag: tag | FNIC_TAG_DEV_RST,
2345 task_req: FCPIO_ITMF_ABT_TASK_TERM,
2346 fc_lun: fc_lun.scsi_lun, io_req)) {
2347 wait_for_completion_timeout(x: &tm_done,
2348 timeout: msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT));
2349 } else {
2350 spin_lock_irqsave(io_lock, flags);
2351 fnic_priv(cmd: sc)->flags |= FNIC_DEV_RST_TERM_ISSUED;
2352 fnic_priv(cmd: sc)->state = FNIC_IOREQ_ABTS_PENDING;
2353 io_req->abts_done = &tm_done;
2354 spin_unlock_irqrestore(lock: io_lock, flags);
2355 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2356 "Abort and terminate issued on Device reset "
2357 "tag 0x%x sc 0x%p\n", tag, sc);
2358 break;
2359 }
2360 }
2361 while (1) {
2362 spin_lock_irqsave(io_lock, flags);
2363 if (!(fnic_priv(cmd: sc)->flags & FNIC_DEV_RST_DONE)) {
2364 spin_unlock_irqrestore(lock: io_lock, flags);
2365 wait_for_completion_timeout(x: &tm_done,
2366 timeout: msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
2367 break;
2368 } else {
2369 io_req = fnic_priv(cmd: sc)->io_req;
2370 io_req->abts_done = NULL;
2371 goto fnic_device_reset_clean;
2372 }
2373 }
2374 } else {
2375 spin_unlock_irqrestore(lock: io_lock, flags);
2376 }
2377
2378 /* Completed, but not successful, clean up the io_req, return fail */
2379 if (status != FCPIO_SUCCESS) {
2380 spin_lock_irqsave(io_lock, flags);
2381 FNIC_SCSI_DBG(KERN_DEBUG,
2382 fnic->lport->host,
2383 "Device reset completed - failed\n");
2384 io_req = fnic_priv(cmd: sc)->io_req;
2385 goto fnic_device_reset_clean;
2386 }
2387
2388 /*
2389 * Clean up any aborts on this lun that have still not
2390 * completed. If any of these fail, then LUN reset fails.
2391 * clean_pending_aborts cleans all cmds on this lun except
2392 * the lun reset cmd. If all cmds get cleaned, the lun reset
2393 * succeeds
2394 */
2395 if (fnic_clean_pending_aborts(fnic, lr_sc: sc, new_sc)) {
2396 spin_lock_irqsave(io_lock, flags);
2397 io_req = fnic_priv(cmd: sc)->io_req;
2398 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2399 "Device reset failed"
2400 " since could not abort all IOs\n");
2401 goto fnic_device_reset_clean;
2402 }
2403
2404 /* Clean lun reset command */
2405 spin_lock_irqsave(io_lock, flags);
2406 io_req = fnic_priv(cmd: sc)->io_req;
2407 if (io_req)
2408 /* Completed, and successful */
2409 ret = SUCCESS;
2410
2411fnic_device_reset_clean:
2412 if (io_req)
2413 fnic_priv(cmd: sc)->io_req = NULL;
2414
2415 spin_unlock_irqrestore(lock: io_lock, flags);
2416
2417 if (io_req) {
2418 start_time = io_req->start_time;
2419 fnic_release_ioreq_buf(fnic, io_req, sc);
2420 mempool_free(element: io_req, pool: fnic->io_req_pool);
2421 }
2422
2423fnic_device_reset_end:
2424 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc,
2425 jiffies_to_msecs(jiffies - start_time),
2426 0, ((u64)sc->cmnd[0] << 32 |
2427 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 |
2428 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]),
2429 fnic_flags_and_state(sc));
2430
2431 if (new_sc) {
2432 fnic->sgreset_sc = NULL;
2433 mutex_unlock(lock: &fnic->sgreset_mutex);
2434 }
2435
2436 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2437 "Returning from device reset %s\n",
2438 (ret == SUCCESS) ?
2439 "SUCCESS" : "FAILED");
2440
2441 if (ret == FAILED)
2442 atomic64_inc(v: &reset_stats->device_reset_failures);
2443
2444 return ret;
2445}
2446
2447/* Clean up all IOs, clean up libFC local port */
2448int fnic_reset(struct Scsi_Host *shost)
2449{
2450 struct fc_lport *lp;
2451 struct fnic *fnic;
2452 int ret = 0;
2453 struct reset_stats *reset_stats;
2454
2455 lp = shost_priv(shost);
2456 fnic = lport_priv(lport: lp);
2457 reset_stats = &fnic->fnic_stats.reset_stats;
2458
2459 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2460 "fnic_reset called\n");
2461
2462 atomic64_inc(v: &reset_stats->fnic_resets);
2463
2464 /*
2465 * Reset local port, this will clean up libFC exchanges,
2466 * reset remote port sessions, and if link is up, begin flogi
2467 */
2468 ret = fc_lport_reset(lp);
2469
2470 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2471 "Returning from fnic reset %s\n",
2472 (ret == 0) ?
2473 "SUCCESS" : "FAILED");
2474
2475 if (ret == 0)
2476 atomic64_inc(v: &reset_stats->fnic_reset_completions);
2477 else
2478 atomic64_inc(v: &reset_stats->fnic_reset_failures);
2479
2480 return ret;
2481}
2482
2483/*
2484 * SCSI Error handling calls driver's eh_host_reset if all prior
2485 * error handling levels return FAILED. If host reset completes
2486 * successfully, and if link is up, then Fabric login begins.
2487 *
2488 * Host Reset is the highest level of error recovery. If this fails, then
2489 * host is offlined by SCSI.
2490 *
2491 */
2492int fnic_host_reset(struct scsi_cmnd *sc)
2493{
2494 int ret;
2495 unsigned long wait_host_tmo;
2496 struct Scsi_Host *shost = sc->device->host;
2497 struct fc_lport *lp = shost_priv(shost);
2498 struct fnic *fnic = lport_priv(lport: lp);
2499 unsigned long flags;
2500
2501 spin_lock_irqsave(&fnic->fnic_lock, flags);
2502 if (!fnic->internal_reset_inprogress) {
2503 fnic->internal_reset_inprogress = true;
2504 } else {
2505 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2506 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2507 "host reset in progress skipping another host reset\n");
2508 return SUCCESS;
2509 }
2510 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2511
2512 /*
2513 * If fnic_reset is successful, wait for fabric login to complete
2514 * scsi-ml tries to send a TUR to every device if host reset is
2515 * successful, so before returning to scsi, fabric should be up
2516 */
2517 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED;
2518 if (ret == SUCCESS) {
2519 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
2520 ret = FAILED;
2521 while (time_before(jiffies, wait_host_tmo)) {
2522 if ((lp->state == LPORT_ST_READY) &&
2523 (lp->link_up)) {
2524 ret = SUCCESS;
2525 break;
2526 }
2527 ssleep(seconds: 1);
2528 }
2529 }
2530
2531 spin_lock_irqsave(&fnic->fnic_lock, flags);
2532 fnic->internal_reset_inprogress = false;
2533 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2534 return ret;
2535}
2536
2537/*
2538 * This fxn is called from libFC when host is removed
2539 */
2540void fnic_scsi_abort_io(struct fc_lport *lp)
2541{
2542 int err = 0;
2543 unsigned long flags;
2544 enum fnic_state old_state;
2545 struct fnic *fnic = lport_priv(lport: lp);
2546 DECLARE_COMPLETION_ONSTACK(remove_wait);
2547
2548 /* Issue firmware reset for fnic, wait for reset to complete */
2549retry_fw_reset:
2550 spin_lock_irqsave(&fnic->fnic_lock, flags);
2551 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) &&
2552 fnic->link_events) {
2553 /* fw reset is in progress, poll for its completion */
2554 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2555 schedule_timeout(timeout: msecs_to_jiffies(m: 100));
2556 goto retry_fw_reset;
2557 }
2558
2559 fnic->remove_wait = &remove_wait;
2560 old_state = fnic->state;
2561 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2562 fnic_update_mac_locked(fnic, new: fnic->ctlr.ctl_src_addr);
2563 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2564
2565 err = fnic_fw_reset_handler(fnic);
2566 if (err) {
2567 spin_lock_irqsave(&fnic->fnic_lock, flags);
2568 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2569 fnic->state = old_state;
2570 fnic->remove_wait = NULL;
2571 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2572 return;
2573 }
2574
2575 /* Wait for firmware reset to complete */
2576 wait_for_completion_timeout(x: &remove_wait,
2577 timeout: msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
2578
2579 spin_lock_irqsave(&fnic->fnic_lock, flags);
2580 fnic->remove_wait = NULL;
2581 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
2582 "fnic_scsi_abort_io %s\n",
2583 (fnic->state == FNIC_IN_ETH_MODE) ?
2584 "SUCCESS" : "FAILED");
2585 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2586
2587}
2588
2589/*
2590 * This fxn called from libFC to clean up driver IO state on link down
2591 */
2592void fnic_scsi_cleanup(struct fc_lport *lp)
2593{
2594 unsigned long flags;
2595 enum fnic_state old_state;
2596 struct fnic *fnic = lport_priv(lport: lp);
2597
2598 /* issue fw reset */
2599retry_fw_reset:
2600 spin_lock_irqsave(&fnic->fnic_lock, flags);
2601 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) {
2602 /* fw reset is in progress, poll for its completion */
2603 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2604 schedule_timeout(timeout: msecs_to_jiffies(m: 100));
2605 goto retry_fw_reset;
2606 }
2607 old_state = fnic->state;
2608 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
2609 fnic_update_mac_locked(fnic, new: fnic->ctlr.ctl_src_addr);
2610 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2611
2612 if (fnic_fw_reset_handler(fnic)) {
2613 spin_lock_irqsave(&fnic->fnic_lock, flags);
2614 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
2615 fnic->state = old_state;
2616 spin_unlock_irqrestore(lock: &fnic->fnic_lock, flags);
2617 }
2618
2619}
2620
2621void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2622{
2623}
2624
2625void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
2626{
2627 struct fnic *fnic = lport_priv(lport: lp);
2628
2629 /* Non-zero sid, nothing to do */
2630 if (sid)
2631 goto call_fc_exch_mgr_reset;
2632
2633 if (did) {
2634 fnic_rport_exch_reset(fnic, port_id: did);
2635 goto call_fc_exch_mgr_reset;
2636 }
2637
2638 /*
2639 * sid = 0, did = 0
2640 * link down or device being removed
2641 */
2642 if (!fnic->in_remove)
2643 fnic_scsi_cleanup(lp);
2644 else
2645 fnic_scsi_abort_io(lp);
2646
2647 /* call libFC exch mgr reset to reset its exchanges */
2648call_fc_exch_mgr_reset:
2649 fc_exch_mgr_reset(lp, s_id: sid, d_id: did);
2650
2651}
2652
2653static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data)
2654{
2655 struct fnic_pending_aborts_iter_data *iter_data = data;
2656 struct fnic *fnic = iter_data->fnic;
2657 int cmd_state;
2658 struct fnic_io_req *io_req;
2659 spinlock_t *io_lock;
2660 unsigned long flags;
2661
2662 /*
2663 * ignore this lun reset cmd or cmds that do not belong to
2664 * this lun
2665 */
2666 if (iter_data->lr_sc && sc == iter_data->lr_sc)
2667 return true;
2668 if (iter_data->lun_dev && sc->device != iter_data->lun_dev)
2669 return true;
2670
2671 io_lock = fnic_io_lock_hash(fnic, sc);
2672 spin_lock_irqsave(io_lock, flags);
2673
2674 io_req = fnic_priv(cmd: sc)->io_req;
2675 if (!io_req) {
2676 spin_unlock_irqrestore(lock: io_lock, flags);
2677 return true;
2678 }
2679
2680 /*
2681 * Found IO that is still pending with firmware and
2682 * belongs to the LUN that we are resetting
2683 */
2684 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
2685 "Found IO in %s on lun\n",
2686 fnic_ioreq_state_to_str(fnic_priv(sc)->state));
2687 cmd_state = fnic_priv(cmd: sc)->state;
2688 spin_unlock_irqrestore(lock: io_lock, flags);
2689 if (cmd_state == FNIC_IOREQ_ABTS_PENDING)
2690 iter_data->ret = 1;
2691
2692 return iter_data->ret ? false : true;
2693}
2694
2695/*
2696 * fnic_is_abts_pending() is a helper function that
2697 * walks through tag map to check if there is any IOs pending,if there is one,
2698 * then it returns 1 (true), otherwise 0 (false)
2699 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN,
2700 * otherwise, it checks for all IOs.
2701 */
2702int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
2703{
2704 struct fnic_pending_aborts_iter_data iter_data = {
2705 .fnic = fnic,
2706 .lun_dev = NULL,
2707 .ret = 0,
2708 };
2709
2710 if (lr_sc) {
2711 iter_data.lun_dev = lr_sc->device;
2712 iter_data.lr_sc = lr_sc;
2713 }
2714
2715 /* walk again to check, if IOs are still pending in fw */
2716 scsi_host_busy_iter(fnic->lport->host,
2717 fn: fnic_abts_pending_iter, priv: &iter_data);
2718
2719 return iter_data.ret;
2720}
2721

source code of linux/drivers/scsi/fnic/fnic_scsi.c