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drm/tests: hdmi: Fix memory leaks in drm_display_mode_from_cea_vic()
[drm/drm-misc.git] / drivers / scsi / snic / snic_scsi.c
blob84973f0f771e200b901ab83d9808c0e11bc49d78
1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright 2014 Cisco Systems, Inc. All rights reserved.
3
4 #include <linux/mempool.h>
5 #include <linux/errno.h>
6 #include <linux/init.h>
7 #include <linux/workqueue.h>
8 #include <linux/pci.h>
9 #include <linux/spinlock.h>
10 #include <linux/delay.h>
11 #include <linux/gfp.h>
12 #include <scsi/scsi.h>
13 #include <scsi/scsi_host.h>
14 #include <scsi/scsi_device.h>
15 #include <scsi/scsi_cmnd.h>
16 #include <scsi/scsi_tcq.h>
17 #include <scsi/scsi_dbg.h>
18
19 #include "snic_io.h"
20 #include "snic.h"
21
22 #define snic_cmd_tag(sc) (scsi_cmd_to_rq(sc)->tag)
23
24 const char *snic_state_str[] = {
25 [SNIC_INIT] = "SNIC_INIT",
26 [SNIC_ERROR] = "SNIC_ERROR",
27 [SNIC_ONLINE] = "SNIC_ONLINE",
28 [SNIC_OFFLINE] = "SNIC_OFFLINE",
29 [SNIC_FWRESET] = "SNIC_FWRESET",
30 };
31
32 static const char * const snic_req_state_str[] = {
33 [SNIC_IOREQ_NOT_INITED] = "SNIC_IOREQ_NOT_INITED",
34 [SNIC_IOREQ_PENDING] = "SNIC_IOREQ_PENDING",
35 [SNIC_IOREQ_ABTS_PENDING] = "SNIC_IOREQ_ABTS_PENDING",
36 [SNIC_IOREQ_ABTS_COMPLETE] = "SNIC_IOREQ_ABTS_COMPLETE",
37 [SNIC_IOREQ_LR_PENDING] = "SNIC_IOREQ_LR_PENDING",
38 [SNIC_IOREQ_LR_COMPLETE] = "SNIC_IOREQ_LR_COMPLETE",
39 [SNIC_IOREQ_COMPLETE] = "SNIC_IOREQ_CMD_COMPLETE",
40 };
41
42 /* snic cmd status strings */
43 static const char * const snic_io_status_str[] = {
44 [SNIC_STAT_IO_SUCCESS] = "SNIC_STAT_IO_SUCCESS", /* 0x0 */
45 [SNIC_STAT_INVALID_HDR] = "SNIC_STAT_INVALID_HDR",
46 [SNIC_STAT_OUT_OF_RES] = "SNIC_STAT_OUT_OF_RES",
47 [SNIC_STAT_INVALID_PARM] = "SNIC_STAT_INVALID_PARM",
48 [SNIC_STAT_REQ_NOT_SUP] = "SNIC_STAT_REQ_NOT_SUP",
49 [SNIC_STAT_IO_NOT_FOUND] = "SNIC_STAT_IO_NOT_FOUND",
50 [SNIC_STAT_ABORTED] = "SNIC_STAT_ABORTED",
51 [SNIC_STAT_TIMEOUT] = "SNIC_STAT_TIMEOUT",
52 [SNIC_STAT_SGL_INVALID] = "SNIC_STAT_SGL_INVALID",
53 [SNIC_STAT_DATA_CNT_MISMATCH] = "SNIC_STAT_DATA_CNT_MISMATCH",
54 [SNIC_STAT_FW_ERR] = "SNIC_STAT_FW_ERR",
55 [SNIC_STAT_ITMF_REJECT] = "SNIC_STAT_ITMF_REJECT",
56 [SNIC_STAT_ITMF_FAIL] = "SNIC_STAT_ITMF_FAIL",
57 [SNIC_STAT_ITMF_INCORRECT_LUN] = "SNIC_STAT_ITMF_INCORRECT_LUN",
58 [SNIC_STAT_CMND_REJECT] = "SNIC_STAT_CMND_REJECT",
59 [SNIC_STAT_DEV_OFFLINE] = "SNIC_STAT_DEV_OFFLINE",
60 [SNIC_STAT_NO_BOOTLUN] = "SNIC_STAT_NO_BOOTLUN",
61 [SNIC_STAT_SCSI_ERR] = "SNIC_STAT_SCSI_ERR",
62 [SNIC_STAT_NOT_READY] = "SNIC_STAT_NOT_READY",
63 [SNIC_STAT_FATAL_ERROR] = "SNIC_STAT_FATAL_ERROR",
64 };
65
66 static void snic_scsi_cleanup(struct snic *, int);
67
68 const char *
69 snic_state_to_str(unsigned int state)
70 {
71 if (state >= ARRAY_SIZE(snic_state_str) || !snic_state_str[state])
72 return "Unknown";
73
74 return snic_state_str[state];
75 }
76
77 static const char *
78 snic_io_status_to_str(unsigned int state)
79 {
80 if ((state >= ARRAY_SIZE(snic_io_status_str)) ||
81 (!snic_io_status_str[state]))
82 return "Unknown";
83
84 return snic_io_status_str[state];
85 }
86
87 static const char *
88 snic_ioreq_state_to_str(unsigned int state)
89 {
90 if (state >= ARRAY_SIZE(snic_req_state_str) ||
91 !snic_req_state_str[state])
92 return "Unknown";
93
94 return snic_req_state_str[state];
95 }
96
97 static inline spinlock_t *
98 snic_io_lock_hash(struct snic *snic, struct scsi_cmnd *sc)
99 {
100 u32 hash = snic_cmd_tag(sc) & (SNIC_IO_LOCKS - 1);
101
102 return &snic->io_req_lock[hash];
103 }
104
105 static inline spinlock_t *
106 snic_io_lock_tag(struct snic *snic, int tag)
107 {
108 return &snic->io_req_lock[tag & (SNIC_IO_LOCKS - 1)];
109 }
110
111 /* snic_release_req_buf : Releases snic_req_info */
112 static void
113 snic_release_req_buf(struct snic *snic,
114 struct snic_req_info *rqi,
115 struct scsi_cmnd *sc)
116 {
117 struct snic_host_req *req = rqi_to_req(rqi);
118
119 /* Freeing cmd without marking completion, not okay */
120 SNIC_BUG_ON(!((CMD_STATE(sc) == SNIC_IOREQ_COMPLETE) ||
121 (CMD_STATE(sc) == SNIC_IOREQ_ABTS_COMPLETE) ||
122 (CMD_FLAGS(sc) & SNIC_DEV_RST_NOTSUP) ||
123 (CMD_FLAGS(sc) & SNIC_IO_INTERNAL_TERM_ISSUED) ||
124 (CMD_FLAGS(sc) & SNIC_DEV_RST_TERM_ISSUED) ||
125 (CMD_FLAGS(sc) & SNIC_SCSI_CLEANUP) ||
126 (CMD_STATE(sc) == SNIC_IOREQ_LR_COMPLETE)));
127
128 SNIC_SCSI_DBG(snic->shost,
129 "Rel_req:sc %p:tag %x:rqi %p:ioreq %p:abt %p:dr %p: state %s:flags 0x%llx\n",
130 sc, snic_cmd_tag(sc), rqi, rqi->req, rqi->abort_req,
131 rqi->dr_req, snic_ioreq_state_to_str(CMD_STATE(sc)),
132 CMD_FLAGS(sc));
133
134 if (req->u.icmnd.sense_addr)
135 dma_unmap_single(&snic->pdev->dev,
136 le64_to_cpu(req->u.icmnd.sense_addr),
137 SCSI_SENSE_BUFFERSIZE,
138 DMA_FROM_DEVICE);
139
140 scsi_dma_unmap(sc);
141
142 snic_req_free(snic, rqi);
143 } /* end of snic_release_req_buf */
144
145 /*
146 * snic_queue_icmnd_req : Queues snic_icmnd request
147 */
148 static int
149 snic_queue_icmnd_req(struct snic *snic,
150 struct snic_req_info *rqi,
151 struct scsi_cmnd *sc,
152 int sg_cnt)
153 {
154 struct scatterlist *sg;
155 struct snic_sg_desc *sgd;
156 dma_addr_t pa = 0;
157 struct scsi_lun lun;
158 u16 flags = 0;
159 int ret = 0;
160 unsigned int i;
161
162 if (sg_cnt) {
163 flags = SNIC_ICMND_ESGL;
164 sgd = (struct snic_sg_desc *) req_to_sgl(rqi->req);
165
166 for_each_sg(scsi_sglist(sc), sg, sg_cnt, i) {
167 sgd->addr = cpu_to_le64(sg_dma_address(sg));
168 sgd->len = cpu_to_le32(sg_dma_len(sg));
169 sgd->_resvd = 0;
170 sgd++;
171 }
172 }
173
174 pa = dma_map_single(&snic->pdev->dev,
175 sc->sense_buffer,
176 SCSI_SENSE_BUFFERSIZE,
177 DMA_FROM_DEVICE);
178 if (dma_mapping_error(&snic->pdev->dev, pa)) {
179 SNIC_HOST_ERR(snic->shost,
180 "QIcmnd:PCI Map Failed for sns buf %p tag %x\n",
181 sc->sense_buffer, snic_cmd_tag(sc));
182 ret = -ENOMEM;
183
184 return ret;
185 }
186
187 int_to_scsilun(sc->device->lun, &lun);
188 if (sc->sc_data_direction == DMA_FROM_DEVICE)
189 flags |= SNIC_ICMND_RD;
190 if (sc->sc_data_direction == DMA_TO_DEVICE)
191 flags |= SNIC_ICMND_WR;
192
193 /* Initialize icmnd */
194 snic_icmnd_init(rqi->req,
195 snic_cmd_tag(sc),
196 snic->config.hid, /* hid */
197 (ulong) rqi,
198 flags, /* command flags */
199 rqi->tgt_id,
200 lun.scsi_lun,
201 sc->cmnd,
202 sc->cmd_len,
203 scsi_bufflen(sc),
204 sg_cnt,
205 (ulong) req_to_sgl(rqi->req),
206 pa, /* sense buffer pa */
207 SCSI_SENSE_BUFFERSIZE);
208
209 atomic64_inc(&snic->s_stats.io.active);
210 ret = snic_queue_wq_desc(snic, rqi->req, rqi->req_len);
211 if (ret) {
212 atomic64_dec(&snic->s_stats.io.active);
213 SNIC_HOST_ERR(snic->shost,
214 "QIcmnd: Queuing Icmnd Failed. ret = %d\n",
215 ret);
216 } else
217 snic_stats_update_active_ios(&snic->s_stats);
218
219 return ret;
220 } /* end of snic_queue_icmnd_req */
221
222 /*
223 * snic_issue_scsi_req : Prepares IO request and Issues to FW.
224 */
225 static int
226 snic_issue_scsi_req(struct snic *snic,
227 struct snic_tgt *tgt,
228 struct scsi_cmnd *sc)
229 {
230 struct snic_req_info *rqi = NULL;
231 int sg_cnt = 0;
232 int ret = 0;
233 u32 tag = snic_cmd_tag(sc);
234 u64 cmd_trc = 0, cmd_st_flags = 0;
235 spinlock_t *io_lock = NULL;
236 unsigned long flags;
237
238 CMD_STATE(sc) = SNIC_IOREQ_NOT_INITED;
239 CMD_FLAGS(sc) = SNIC_NO_FLAGS;
240 sg_cnt = scsi_dma_map(sc);
241 if (sg_cnt < 0) {
242 SNIC_TRC((u16)snic->shost->host_no, tag, (ulong) sc, 0,
243 sc->cmnd[0], sg_cnt, CMD_STATE(sc));
244
245 SNIC_HOST_ERR(snic->shost, "issue_sc:Failed to map SG List.\n");
246 ret = -ENOMEM;
247
248 goto issue_sc_end;
249 }
250
251 rqi = snic_req_init(snic, sg_cnt);
252 if (!rqi) {
253 scsi_dma_unmap(sc);
254 ret = -ENOMEM;
255
256 goto issue_sc_end;
257 }
258
259 rqi->tgt_id = tgt->id;
260 rqi->sc = sc;
261
262 CMD_STATE(sc) = SNIC_IOREQ_PENDING;
263 CMD_SP(sc) = (char *) rqi;
264 cmd_trc = SNIC_TRC_CMD(sc);
265 CMD_FLAGS(sc) |= (SNIC_IO_INITIALIZED | SNIC_IO_ISSUED);
266 cmd_st_flags = SNIC_TRC_CMD_STATE_FLAGS(sc);
267 io_lock = snic_io_lock_hash(snic, sc);
268
269 /* create wq desc and enqueue it */
270 ret = snic_queue_icmnd_req(snic, rqi, sc, sg_cnt);
271 if (ret) {
272 SNIC_HOST_ERR(snic->shost,
273 "issue_sc: icmnd qing Failed for sc %p, err %d\n",
274 sc, ret);
275
276 spin_lock_irqsave(io_lock, flags);
277 rqi = (struct snic_req_info *) CMD_SP(sc);
278 CMD_SP(sc) = NULL;
279 CMD_STATE(sc) = SNIC_IOREQ_COMPLETE;
280 CMD_FLAGS(sc) &= ~SNIC_IO_ISSUED; /* turn off the flag */
281 spin_unlock_irqrestore(io_lock, flags);
282
283 if (rqi)
284 snic_release_req_buf(snic, rqi, sc);
285
286 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, 0, 0, 0,
287 SNIC_TRC_CMD_STATE_FLAGS(sc));
288 } else {
289 u32 io_sz = scsi_bufflen(sc) >> 9;
290 u32 qtime = jiffies - rqi->start_time;
291 struct snic_io_stats *iostats = &snic->s_stats.io;
292
293 if (io_sz > atomic64_read(&iostats->max_io_sz))
294 atomic64_set(&iostats->max_io_sz, io_sz);
295
296 if (qtime > atomic64_read(&iostats->max_qtime))
297 atomic64_set(&iostats->max_qtime, qtime);
298
299 SNIC_SCSI_DBG(snic->shost,
300 "issue_sc:sc %p, tag %d queued to WQ.\n",
301 sc, tag);
302
303 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, (ulong) rqi,
304 sg_cnt, cmd_trc, cmd_st_flags);
305 }
306
307 issue_sc_end:
308
309 return ret;
310 } /* end of snic_issue_scsi_req */
311
312
313 /*
314 * snic_queuecommand
315 * Routine to send a scsi cdb to LLD
316 * Called with host_lock held and interrupts disabled
317 */
318 int
319 snic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc)
320 {
321 struct snic_tgt *tgt = NULL;
322 struct snic *snic = shost_priv(shost);
323 int ret;
324
325 tgt = starget_to_tgt(scsi_target(sc->device));
326 ret = snic_tgt_chkready(tgt);
327 if (ret) {
328 SNIC_HOST_ERR(shost, "Tgt %p id %d Not Ready.\n", tgt, tgt->id);
329 atomic64_inc(&snic->s_stats.misc.tgt_not_rdy);
330 sc->result = ret;
331 scsi_done(sc);
332
333 return 0;
334 }
335
336 if (snic_get_state(snic) != SNIC_ONLINE) {
337 SNIC_HOST_ERR(shost, "snic state is %s\n",
338 snic_state_str[snic_get_state(snic)]);
339
340 return SCSI_MLQUEUE_HOST_BUSY;
341 }
342 atomic_inc(&snic->ios_inflight);
343
344 SNIC_SCSI_DBG(shost, "sc %p Tag %d (sc %0x) lun %lld in snic_qcmd\n",
345 sc, snic_cmd_tag(sc), sc->cmnd[0], sc->device->lun);
346
347 ret = snic_issue_scsi_req(snic, tgt, sc);
348 if (ret) {
349 SNIC_HOST_ERR(shost, "Failed to Q, Scsi Req w/ err %d.\n", ret);
350 ret = SCSI_MLQUEUE_HOST_BUSY;
351 }
352
353 atomic_dec(&snic->ios_inflight);
354
355 return ret;
356 } /* end of snic_queuecommand */
357
358 /*
359 * snic_process_abts_pending_state:
360 * caller should hold IO lock
361 */
362 static void
363 snic_proc_tmreq_pending_state(struct snic *snic,
364 struct scsi_cmnd *sc,
365 u8 cmpl_status)
366 {
367 int state = CMD_STATE(sc);
368
369 if (state == SNIC_IOREQ_ABTS_PENDING)
370 CMD_FLAGS(sc) |= SNIC_IO_ABTS_PENDING;
371 else if (state == SNIC_IOREQ_LR_PENDING)
372 CMD_FLAGS(sc) |= SNIC_DEV_RST_PENDING;
373 else
374 SNIC_BUG_ON(1);
375
376 switch (cmpl_status) {
377 case SNIC_STAT_IO_SUCCESS:
378 CMD_FLAGS(sc) |= SNIC_IO_DONE;
379 break;
380
381 case SNIC_STAT_ABORTED:
382 CMD_FLAGS(sc) |= SNIC_IO_ABORTED;
383 break;
384
385 default:
386 SNIC_BUG_ON(1);
387 }
388 }
389
390 /*
391 * snic_process_io_failed_state:
392 * Processes IO's error states
393 */
394 static void
395 snic_process_io_failed_state(struct snic *snic,
396 struct snic_icmnd_cmpl *icmnd_cmpl,
397 struct scsi_cmnd *sc,
398 u8 cmpl_stat)
399 {
400 int res = 0;
401
402 switch (cmpl_stat) {
403 case SNIC_STAT_TIMEOUT: /* Req was timedout */
404 atomic64_inc(&snic->s_stats.misc.io_tmo);
405 res = DID_TIME_OUT;
406 break;
407
408 case SNIC_STAT_ABORTED: /* Req was aborted */
409 atomic64_inc(&snic->s_stats.misc.io_aborted);
410 res = DID_ABORT;
411 break;
412
413 case SNIC_STAT_DATA_CNT_MISMATCH:/* Recv/Sent more/less data than exp */
414 atomic64_inc(&snic->s_stats.misc.data_cnt_mismat);
415 scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid));
416 res = DID_ERROR;
417 break;
418
419 case SNIC_STAT_OUT_OF_RES: /* Out of resources to complete request */
420 atomic64_inc(&snic->s_stats.fw.out_of_res);
421 res = DID_REQUEUE;
422 break;
423
424 case SNIC_STAT_IO_NOT_FOUND: /* Requested I/O was not found */
425 atomic64_inc(&snic->s_stats.io.io_not_found);
426 res = DID_ERROR;
427 break;
428
429 case SNIC_STAT_SGL_INVALID: /* Req was aborted to due to sgl error*/
430 atomic64_inc(&snic->s_stats.misc.sgl_inval);
431 res = DID_ERROR;
432 break;
433
434 case SNIC_STAT_FW_ERR: /* Req terminated due to FW Error */
435 atomic64_inc(&snic->s_stats.fw.io_errs);
436 res = DID_ERROR;
437 break;
438
439 case SNIC_STAT_SCSI_ERR: /* FW hits SCSI Error */
440 atomic64_inc(&snic->s_stats.fw.scsi_errs);
441 break;
442
443 case SNIC_STAT_NOT_READY: /* XPT yet to initialize */
444 case SNIC_STAT_DEV_OFFLINE: /* Device offline */
445 res = DID_NO_CONNECT;
446 break;
447
448 case SNIC_STAT_INVALID_HDR: /* Hdr contains invalid data */
449 case SNIC_STAT_INVALID_PARM: /* Some param in req is invalid */
450 case SNIC_STAT_REQ_NOT_SUP: /* Req type is not supported */
451 case SNIC_STAT_CMND_REJECT: /* Req rejected */
452 case SNIC_STAT_FATAL_ERROR: /* XPT Error */
453 default:
454 SNIC_SCSI_DBG(snic->shost,
455 "Invalid Hdr/Param or Req Not Supported or Cmnd Rejected or Device Offline. or Unknown\n");
456 res = DID_ERROR;
457 break;
458 }
459
460 SNIC_HOST_ERR(snic->shost, "fw returns failed status %s flags 0x%llx\n",
461 snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc));
462
463 /* Set sc->result */
464 sc->result = (res << 16) | icmnd_cmpl->scsi_status;
465 } /* end of snic_process_io_failed_state */
466
467 /*
468 * snic_tmreq_pending : is task management in progress.
469 */
470 static int
471 snic_tmreq_pending(struct scsi_cmnd *sc)
472 {
473 int state = CMD_STATE(sc);
474
475 return ((state == SNIC_IOREQ_ABTS_PENDING) ||
476 (state == SNIC_IOREQ_LR_PENDING));
477 }
478
479 /*
480 * snic_process_icmnd_cmpl_status:
481 * Caller should hold io_lock
482 */
483 static int
484 snic_process_icmnd_cmpl_status(struct snic *snic,
485 struct snic_icmnd_cmpl *icmnd_cmpl,
486 u8 cmpl_stat,
487 struct scsi_cmnd *sc)
488 {
489 u8 scsi_stat = icmnd_cmpl->scsi_status;
490 int ret = 0;
491
492 /* Mark the IO as complete */
493 CMD_STATE(sc) = SNIC_IOREQ_COMPLETE;
494
495 if (likely(cmpl_stat == SNIC_STAT_IO_SUCCESS)) {
496 sc->result = (DID_OK << 16) | scsi_stat;
497
498 /* Update SCSI Cmd with resid value */
499 scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid));
500
501 if (icmnd_cmpl->flags & SNIC_ICMND_CMPL_UNDR_RUN)
502 atomic64_inc(&snic->s_stats.misc.io_under_run);
503
504 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
505 atomic64_inc(&snic->s_stats.misc.qfull);
506
507 ret = 0;
508 } else {
509 snic_process_io_failed_state(snic, icmnd_cmpl, sc, cmpl_stat);
510 atomic64_inc(&snic->s_stats.io.fail);
511 SNIC_HOST_ERR(snic->shost,
512 "icmnd_cmpl: IO Failed : Hdr Status %s flags 0x%llx\n",
513 snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc));
514 ret = 1;
515 }
516
517 return ret;
518 } /* end of snic_process_icmnd_cmpl_status */
519
520
521 /*
522 * snic_icmnd_cmpl_handler
523 * Routine to handle icmnd completions
524 */
525 static void
526 snic_icmnd_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
527 {
528 u8 typ, hdr_stat;
529 u32 cmnd_id, hid;
530 ulong ctx;
531 struct scsi_cmnd *sc = NULL;
532 struct snic_icmnd_cmpl *icmnd_cmpl = NULL;
533 struct snic_host_req *req = NULL;
534 struct snic_req_info *rqi = NULL;
535 unsigned long flags, start_time;
536 spinlock_t *io_lock;
537 u8 sc_stat = 0;
538
539 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
540 icmnd_cmpl = &fwreq->u.icmnd_cmpl;
541 sc_stat = icmnd_cmpl->scsi_status;
542
543 SNIC_SCSI_DBG(snic->shost,
544 "Icmnd_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,i ctx = %lx\n",
545 typ, hdr_stat, cmnd_id, hid, ctx);
546
547 if (cmnd_id >= snic->max_tag_id) {
548 SNIC_HOST_ERR(snic->shost,
549 "Icmnd_cmpl:Tag Error:Out of Range Tag %d, hdr status = %s\n",
550 cmnd_id, snic_io_status_to_str(hdr_stat));
551 return;
552 }
553
554 sc = scsi_host_find_tag(snic->shost, cmnd_id);
555 WARN_ON_ONCE(!sc);
556
557 if (!sc) {
558 atomic64_inc(&snic->s_stats.io.sc_null);
559 SNIC_HOST_ERR(snic->shost,
560 "Icmnd_cmpl: Scsi Cmnd Not found, sc = NULL Hdr Status = %s tag = 0x%x fwreq = 0x%p\n",
561 snic_io_status_to_str(hdr_stat),
562 cmnd_id,
563 fwreq);
564
565 SNIC_TRC(snic->shost->host_no, cmnd_id, 0,
566 ((u64)hdr_stat << 16 |
567 (u64)sc_stat << 8 | (u64)icmnd_cmpl->flags),
568 (ulong) fwreq, le32_to_cpu(icmnd_cmpl->resid), ctx);
569
570 return;
571 }
572
573 io_lock = snic_io_lock_hash(snic, sc);
574
575 spin_lock_irqsave(io_lock, flags);
576 rqi = (struct snic_req_info *) CMD_SP(sc);
577 SNIC_SCSI_DBG(snic->shost,
578 "Icmnd_cmpl:lun %lld sc %p cmd %xtag %d flags 0x%llx rqi %p\n",
579 sc->device->lun, sc, sc->cmnd[0], snic_cmd_tag(sc),
580 CMD_FLAGS(sc), rqi);
581
582 if (CMD_FLAGS(sc) & SNIC_HOST_RESET_CMD_TERM) {
583 spin_unlock_irqrestore(io_lock, flags);
584
585 return;
586 }
587
588 SNIC_BUG_ON(rqi != (struct snic_req_info *)ctx);
589 WARN_ON_ONCE(req);
590 if (!rqi) {
591 atomic64_inc(&snic->s_stats.io.req_null);
592 CMD_FLAGS(sc) |= SNIC_IO_REQ_NULL;
593 spin_unlock_irqrestore(io_lock, flags);
594
595 SNIC_HOST_ERR(snic->shost,
596 "Icmnd_cmpl:Host Req Not Found(null), Hdr Status %s, Tag 0x%x, sc 0x%p flags 0x%llx\n",
597 snic_io_status_to_str(hdr_stat),
598 cmnd_id, sc, CMD_FLAGS(sc));
599 return;
600 }
601
602 rqi = (struct snic_req_info *) ctx;
603 start_time = rqi->start_time;
604
605 /* firmware completed the io */
606 rqi->io_cmpl = 1;
607
608 /*
609 * if SCSI-ML has already issued abort on this command,
610 * ignore completion of the IO. The abts path will clean it up
611 */
612 if (unlikely(snic_tmreq_pending(sc))) {
613 snic_proc_tmreq_pending_state(snic, sc, hdr_stat);
614 spin_unlock_irqrestore(io_lock, flags);
615
616 snic_stats_update_io_cmpl(&snic->s_stats);
617
618 /* Expected value is SNIC_STAT_ABORTED */
619 if (likely(hdr_stat == SNIC_STAT_ABORTED))
620 return;
621
622 SNIC_SCSI_DBG(snic->shost,
623 "icmnd_cmpl:TM Req Pending(%s), Hdr Status %s sc 0x%p scsi status %x resid %d flags 0x%llx\n",
624 snic_ioreq_state_to_str(CMD_STATE(sc)),
625 snic_io_status_to_str(hdr_stat),
626 sc, sc_stat, le32_to_cpu(icmnd_cmpl->resid),
627 CMD_FLAGS(sc));
628
629 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
630 jiffies_to_msecs(jiffies - start_time), (ulong) fwreq,
631 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
632
633 return;
634 }
635
636 if (snic_process_icmnd_cmpl_status(snic, icmnd_cmpl, hdr_stat, sc)) {
637 scsi_print_command(sc);
638 SNIC_HOST_ERR(snic->shost,
639 "icmnd_cmpl:IO Failed, sc 0x%p Tag %d Cmd %x Hdr Status %s flags 0x%llx\n",
640 sc, sc->cmnd[0], cmnd_id,
641 snic_io_status_to_str(hdr_stat), CMD_FLAGS(sc));
642 }
643
644 /* Break link with the SCSI Command */
645 CMD_SP(sc) = NULL;
646 CMD_FLAGS(sc) |= SNIC_IO_DONE;
647
648 spin_unlock_irqrestore(io_lock, flags);
649
650 /* For now, consider only successful IO. */
651 snic_calc_io_process_time(snic, rqi);
652
653 snic_release_req_buf(snic, rqi, sc);
654
655 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
656 jiffies_to_msecs(jiffies - start_time), (ulong) fwreq,
657 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
658
659
660 scsi_done(sc);
661
662 snic_stats_update_io_cmpl(&snic->s_stats);
663 } /* end of snic_icmnd_cmpl_handler */
664
665 static void
666 snic_proc_dr_cmpl_locked(struct snic *snic,
667 struct snic_fw_req *fwreq,
668 u8 cmpl_stat,
669 u32 cmnd_id,
670 struct scsi_cmnd *sc)
671 {
672 struct snic_req_info *rqi = (struct snic_req_info *) CMD_SP(sc);
673 u32 start_time = rqi->start_time;
674
675 CMD_LR_STATUS(sc) = cmpl_stat;
676
677 SNIC_SCSI_DBG(snic->shost, "itmf_cmpl: Cmd State = %s\n",
678 snic_ioreq_state_to_str(CMD_STATE(sc)));
679
680 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
681 CMD_FLAGS(sc) |= SNIC_DEV_RST_ABTS_PENDING;
682
683 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
684 jiffies_to_msecs(jiffies - start_time),
685 (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc));
686
687 SNIC_SCSI_DBG(snic->shost,
688 "itmf_cmpl: Terminate Pending Dev Reset Cmpl Recvd.id %x, status %s flags 0x%llx\n",
689 (int)(cmnd_id & SNIC_TAG_MASK),
690 snic_io_status_to_str(cmpl_stat),
691 CMD_FLAGS(sc));
692
693 return;
694 }
695
696
697 if (CMD_FLAGS(sc) & SNIC_DEV_RST_TIMEDOUT) {
698 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
699 jiffies_to_msecs(jiffies - start_time),
700 (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc));
701
702 SNIC_SCSI_DBG(snic->shost,
703 "itmf_cmpl:Dev Reset Completion Received after timeout. id %d cmpl status %s flags 0x%llx\n",
704 (int)(cmnd_id & SNIC_TAG_MASK),
705 snic_io_status_to_str(cmpl_stat),
706 CMD_FLAGS(sc));
707
708 return;
709 }
710
711 CMD_STATE(sc) = SNIC_IOREQ_LR_COMPLETE;
712 CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE;
713
714 SNIC_SCSI_DBG(snic->shost,
715 "itmf_cmpl:Dev Reset Cmpl Recvd id %d cmpl status %s flags 0x%llx\n",
716 (int)(cmnd_id & SNIC_TAG_MASK),
717 snic_io_status_to_str(cmpl_stat),
718 CMD_FLAGS(sc));
719
720 if (rqi->dr_done)
721 complete(rqi->dr_done);
722 } /* end of snic_proc_dr_cmpl_locked */
723
724 /*
725 * snic_update_abort_stats : Updates abort stats based on completion status.
726 */
727 static void
728 snic_update_abort_stats(struct snic *snic, u8 cmpl_stat)
729 {
730 struct snic_abort_stats *abt_stats = &snic->s_stats.abts;
731
732 SNIC_SCSI_DBG(snic->shost, "Updating Abort stats.\n");
733
734 switch (cmpl_stat) {
735 case SNIC_STAT_IO_SUCCESS:
736 break;
737
738 case SNIC_STAT_TIMEOUT:
739 atomic64_inc(&abt_stats->fw_tmo);
740 break;
741
742 case SNIC_STAT_IO_NOT_FOUND:
743 atomic64_inc(&abt_stats->io_not_found);
744 break;
745
746 default:
747 atomic64_inc(&abt_stats->fail);
748 break;
749 }
750 }
751
752 static int
753 snic_process_itmf_cmpl(struct snic *snic,
754 struct snic_fw_req *fwreq,
755 u32 cmnd_id,
756 u8 cmpl_stat,
757 struct scsi_cmnd *sc)
758 {
759 struct snic_req_info *rqi = NULL;
760 u32 tm_tags = 0;
761 spinlock_t *io_lock = NULL;
762 unsigned long flags;
763 u32 start_time = 0;
764 int ret = 0;
765
766 io_lock = snic_io_lock_hash(snic, sc);
767 spin_lock_irqsave(io_lock, flags);
768 if (CMD_FLAGS(sc) & SNIC_HOST_RESET_CMD_TERM) {
769 spin_unlock_irqrestore(io_lock, flags);
770
771 return ret;
772 }
773 rqi = (struct snic_req_info *) CMD_SP(sc);
774 WARN_ON_ONCE(!rqi);
775
776 if (!rqi) {
777 atomic64_inc(&snic->s_stats.io.req_null);
778 spin_unlock_irqrestore(io_lock, flags);
779 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
780 SNIC_HOST_ERR(snic->shost,
781 "itmf_cmpl: rqi is null,Hdr stat = %s Tag = 0x%x sc = 0x%p flags 0x%llx\n",
782 snic_io_status_to_str(cmpl_stat), cmnd_id, sc,
783 CMD_FLAGS(sc));
784
785 return ret;
786 }
787
788 /* Extract task management flags */
789 tm_tags = cmnd_id & ~(SNIC_TAG_MASK);
790
791 start_time = rqi->start_time;
792 cmnd_id &= (SNIC_TAG_MASK);
793
794 switch (tm_tags) {
795 case SNIC_TAG_ABORT:
796 /* Abort only issued on cmd */
797 snic_update_abort_stats(snic, cmpl_stat);
798
799 if (CMD_STATE(sc) != SNIC_IOREQ_ABTS_PENDING) {
800 /* This is a late completion. Ignore it. */
801 ret = -1;
802 spin_unlock_irqrestore(io_lock, flags);
803 break;
804 }
805
806 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
807 CMD_ABTS_STATUS(sc) = cmpl_stat;
808 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE;
809
810 SNIC_SCSI_DBG(snic->shost,
811 "itmf_cmpl:Abort Cmpl Recvd.Tag 0x%x Status %s flags 0x%llx\n",
812 cmnd_id,
813 snic_io_status_to_str(cmpl_stat),
814 CMD_FLAGS(sc));
815
816 /*
817 * If scsi_eh thread is blocked waiting for abts complete,
818 * signal completion to it. IO will be cleaned in the thread,
819 * else clean it in this context.
820 */
821 if (rqi->abts_done) {
822 complete(rqi->abts_done);
823 spin_unlock_irqrestore(io_lock, flags);
824
825 break; /* jump out */
826 }
827
828 CMD_SP(sc) = NULL;
829 sc->result = (DID_ERROR << 16);
830 SNIC_SCSI_DBG(snic->shost,
831 "itmf_cmpl: Completing IO. sc %p flags 0x%llx\n",
832 sc, CMD_FLAGS(sc));
833
834 spin_unlock_irqrestore(io_lock, flags);
835
836 snic_release_req_buf(snic, rqi, sc);
837
838 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
839 jiffies_to_msecs(jiffies - start_time),
840 (ulong) fwreq, SNIC_TRC_CMD(sc),
841 SNIC_TRC_CMD_STATE_FLAGS(sc));
842
843 scsi_done(sc);
844
845 break;
846
847 case SNIC_TAG_DEV_RST:
848 case SNIC_TAG_DEV_RST | SNIC_TAG_IOCTL_DEV_RST:
849 snic_proc_dr_cmpl_locked(snic, fwreq, cmpl_stat, cmnd_id, sc);
850 spin_unlock_irqrestore(io_lock, flags);
851 ret = 0;
852
853 break;
854
855 case SNIC_TAG_ABORT | SNIC_TAG_DEV_RST:
856 /* Abort and terminate completion of device reset req */
857
858 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
859 CMD_ABTS_STATUS(sc) = cmpl_stat;
860 CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE;
861
862 SNIC_SCSI_DBG(snic->shost,
863 "itmf_cmpl:dev reset abts cmpl recvd. id %d status %s flags 0x%llx\n",
864 cmnd_id, snic_io_status_to_str(cmpl_stat),
865 CMD_FLAGS(sc));
866
867 if (rqi->abts_done)
868 complete(rqi->abts_done);
869
870 spin_unlock_irqrestore(io_lock, flags);
871
872 break;
873
874 default:
875 spin_unlock_irqrestore(io_lock, flags);
876 SNIC_HOST_ERR(snic->shost,
877 "itmf_cmpl: Unknown TM tag bit 0x%x\n", tm_tags);
878
879 SNIC_HOST_ERR(snic->shost,
880 "itmf_cmpl:Unexpected itmf io stat %s Tag = 0x%x flags 0x%llx\n",
881 snic_ioreq_state_to_str(CMD_STATE(sc)),
882 cmnd_id,
883 CMD_FLAGS(sc));
884 ret = -1;
885 SNIC_BUG_ON(1);
886
887 break;
888 }
889
890 return ret;
891 } /* end of snic_process_itmf_cmpl_status */
892
893 /*
894 * snic_itmf_cmpl_handler.
895 * Routine to handle itmf completions.
896 */
897 static void
898 snic_itmf_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
899 {
900 struct scsi_cmnd *sc = NULL;
901 struct snic_req_info *rqi = NULL;
902 struct snic_itmf_cmpl *itmf_cmpl = NULL;
903 ulong ctx;
904 u32 cmnd_id;
905 u32 hid;
906 u8 typ;
907 u8 hdr_stat;
908
909 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
910 SNIC_SCSI_DBG(snic->shost,
911 "Itmf_cmpl: %s: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,ctx = %lx\n",
912 __func__, typ, hdr_stat, cmnd_id, hid, ctx);
913
914 itmf_cmpl = &fwreq->u.itmf_cmpl;
915 SNIC_SCSI_DBG(snic->shost,
916 "Itmf_cmpl: nterm %u , flags 0x%x\n",
917 le32_to_cpu(itmf_cmpl->nterminated), itmf_cmpl->flags);
918
919 /* spl case, dev reset issued through ioctl */
920 if (cmnd_id & SNIC_TAG_IOCTL_DEV_RST) {
921 rqi = (struct snic_req_info *) ctx;
922 sc = rqi->sc;
923
924 goto ioctl_dev_rst;
925 }
926
927 if ((cmnd_id & SNIC_TAG_MASK) >= snic->max_tag_id) {
928 SNIC_HOST_ERR(snic->shost,
929 "Itmf_cmpl: Tag 0x%x out of Range,HdrStat %s\n",
930 cmnd_id, snic_io_status_to_str(hdr_stat));
931 SNIC_BUG_ON(1);
932
933 return;
934 }
935
936 sc = scsi_host_find_tag(snic->shost, cmnd_id & SNIC_TAG_MASK);
937 WARN_ON_ONCE(!sc);
938
939 ioctl_dev_rst:
940 if (!sc) {
941 atomic64_inc(&snic->s_stats.io.sc_null);
942 SNIC_HOST_ERR(snic->shost,
943 "Itmf_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n",
944 snic_io_status_to_str(hdr_stat), cmnd_id);
945
946 return;
947 }
948
949 snic_process_itmf_cmpl(snic, fwreq, cmnd_id, hdr_stat, sc);
950 } /* end of snic_itmf_cmpl_handler */
951
952
953
954 static void
955 snic_hba_reset_scsi_cleanup(struct snic *snic, struct scsi_cmnd *sc)
956 {
957 struct snic_stats *st = &snic->s_stats;
958 long act_ios = 0, act_fwreqs = 0;
959
960 SNIC_SCSI_DBG(snic->shost, "HBA Reset scsi cleanup.\n");
961 snic_scsi_cleanup(snic, snic_cmd_tag(sc));
962
963 /* Update stats on pending IOs */
964 act_ios = atomic64_read(&st->io.active);
965 atomic64_add(act_ios, &st->io.compl);
966 atomic64_sub(act_ios, &st->io.active);
967
968 act_fwreqs = atomic64_read(&st->fw.actv_reqs);
969 atomic64_sub(act_fwreqs, &st->fw.actv_reqs);
970 }
971
972 /*
973 * snic_hba_reset_cmpl_handler :
974 *
975 * Notes :
976 * 1. Cleanup all the scsi cmds, release all snic specific cmds
977 * 2. Issue Report Targets in case of SAN targets
978 */
979 static int
980 snic_hba_reset_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
981 {
982 ulong ctx;
983 u32 cmnd_id;
984 u32 hid;
985 u8 typ;
986 u8 hdr_stat;
987 struct scsi_cmnd *sc = NULL;
988 struct snic_req_info *rqi = NULL;
989 spinlock_t *io_lock = NULL;
990 unsigned long flags, gflags;
991 int ret = 0;
992
993 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
994 SNIC_HOST_INFO(snic->shost,
995 "reset_cmpl:Tag %d ctx %lx cmpl status %s HBA Reset Completion received.\n",
996 cmnd_id, ctx, snic_io_status_to_str(hdr_stat));
997
998 SNIC_SCSI_DBG(snic->shost,
999 "reset_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n",
1000 typ, hdr_stat, cmnd_id, hid, ctx);
1001
1002 /* spl case, host reset issued through ioctl */
1003 if (cmnd_id == SCSI_NO_TAG) {
1004 rqi = (struct snic_req_info *) ctx;
1005 SNIC_HOST_INFO(snic->shost,
1006 "reset_cmpl:Tag %d ctx %lx cmpl stat %s\n",
1007 cmnd_id, ctx, snic_io_status_to_str(hdr_stat));
1008 sc = rqi->sc;
1009
1010 goto ioctl_hba_rst;
1011 }
1012
1013 if (cmnd_id >= snic->max_tag_id) {
1014 SNIC_HOST_ERR(snic->shost,
1015 "reset_cmpl: Tag 0x%x out of Range,HdrStat %s\n",
1016 cmnd_id, snic_io_status_to_str(hdr_stat));
1017 SNIC_BUG_ON(1);
1018
1019 return 1;
1020 }
1021
1022 sc = scsi_host_find_tag(snic->shost, cmnd_id);
1023 ioctl_hba_rst:
1024 if (!sc) {
1025 atomic64_inc(&snic->s_stats.io.sc_null);
1026 SNIC_HOST_ERR(snic->shost,
1027 "reset_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n",
1028 snic_io_status_to_str(hdr_stat), cmnd_id);
1029 ret = 1;
1030
1031 return ret;
1032 }
1033
1034 SNIC_HOST_INFO(snic->shost,
1035 "reset_cmpl: sc %p rqi %p Tag %d flags 0x%llx\n",
1036 sc, rqi, cmnd_id, CMD_FLAGS(sc));
1037
1038 io_lock = snic_io_lock_hash(snic, sc);
1039 spin_lock_irqsave(io_lock, flags);
1040
1041 if (!snic->remove_wait) {
1042 spin_unlock_irqrestore(io_lock, flags);
1043 SNIC_HOST_ERR(snic->shost,
1044 "reset_cmpl:host reset completed after timeout\n");
1045 ret = 1;
1046
1047 return ret;
1048 }
1049
1050 rqi = (struct snic_req_info *) CMD_SP(sc);
1051 WARN_ON_ONCE(!rqi);
1052
1053 if (!rqi) {
1054 atomic64_inc(&snic->s_stats.io.req_null);
1055 spin_unlock_irqrestore(io_lock, flags);
1056 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
1057 SNIC_HOST_ERR(snic->shost,
1058 "reset_cmpl: rqi is null,Hdr stat %s Tag 0x%x sc 0x%p flags 0x%llx\n",
1059 snic_io_status_to_str(hdr_stat), cmnd_id, sc,
1060 CMD_FLAGS(sc));
1061
1062 ret = 1;
1063
1064 return ret;
1065 }
1066 /* stats */
1067 spin_unlock_irqrestore(io_lock, flags);
1068
1069 /* scsi cleanup */
1070 snic_hba_reset_scsi_cleanup(snic, sc);
1071
1072 SNIC_BUG_ON(snic_get_state(snic) != SNIC_OFFLINE &&
1073 snic_get_state(snic) != SNIC_FWRESET);
1074
1075 /* Careful locking between snic_lock and io lock */
1076 spin_lock_irqsave(io_lock, flags);
1077 spin_lock_irqsave(&snic->snic_lock, gflags);
1078 if (snic_get_state(snic) == SNIC_FWRESET)
1079 snic_set_state(snic, SNIC_ONLINE);
1080 spin_unlock_irqrestore(&snic->snic_lock, gflags);
1081
1082 if (snic->remove_wait)
1083 complete(snic->remove_wait);
1084
1085 spin_unlock_irqrestore(io_lock, flags);
1086 atomic64_inc(&snic->s_stats.reset.hba_reset_cmpl);
1087
1088 ret = 0;
1089 /* Rediscovery is for SAN */
1090 if (snic->config.xpt_type == SNIC_DAS)
1091 return ret;
1092
1093 SNIC_SCSI_DBG(snic->shost, "reset_cmpl: Queuing discovery work.\n");
1094 queue_work(snic_glob->event_q, &snic->disc_work);
1095
1096 return ret;
1097 }
1098
1099 static void
1100 snic_msg_ack_handler(struct snic *snic, struct snic_fw_req *fwreq)
1101 {
1102 SNIC_HOST_INFO(snic->shost, "Message Ack Received.\n");
1103
1104 SNIC_ASSERT_NOT_IMPL(1);
1105 }
1106
1107 static void
1108 snic_aen_handler(struct snic *snic, struct snic_fw_req *fwreq)
1109 {
1110 u8 typ, hdr_stat;
1111 u32 cmnd_id, hid;
1112 ulong ctx;
1113 struct snic_async_evnotify *aen = &fwreq->u.async_ev;
1114 u32 event_id = 0;
1115
1116 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
1117 SNIC_SCSI_DBG(snic->shost,
1118 "aen: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n",
1119 typ, hdr_stat, cmnd_id, hid, ctx);
1120
1121 event_id = le32_to_cpu(aen->ev_id);
1122
1123 switch (event_id) {
1124 case SNIC_EV_TGT_OFFLINE:
1125 SNIC_HOST_INFO(snic->shost, "aen:TGT_OFFLINE Event Recvd.\n");
1126 break;
1127
1128 case SNIC_EV_TGT_ONLINE:
1129 SNIC_HOST_INFO(snic->shost, "aen:TGT_ONLINE Event Recvd.\n");
1130 break;
1131
1132 case SNIC_EV_LUN_OFFLINE:
1133 SNIC_HOST_INFO(snic->shost, "aen:LUN_OFFLINE Event Recvd.\n");
1134 break;
1135
1136 case SNIC_EV_LUN_ONLINE:
1137 SNIC_HOST_INFO(snic->shost, "aen:LUN_ONLINE Event Recvd.\n");
1138 break;
1139
1140 case SNIC_EV_CONF_CHG:
1141 SNIC_HOST_INFO(snic->shost, "aen:Config Change Event Recvd.\n");
1142 break;
1143
1144 case SNIC_EV_TGT_ADDED:
1145 SNIC_HOST_INFO(snic->shost, "aen:TGT_ADD Event Recvd.\n");
1146 break;
1147
1148 case SNIC_EV_TGT_DELTD:
1149 SNIC_HOST_INFO(snic->shost, "aen:TGT_DEL Event Recvd.\n");
1150 break;
1151
1152 case SNIC_EV_LUN_ADDED:
1153 SNIC_HOST_INFO(snic->shost, "aen:LUN_ADD Event Recvd.\n");
1154 break;
1155
1156 case SNIC_EV_LUN_DELTD:
1157 SNIC_HOST_INFO(snic->shost, "aen:LUN_DEL Event Recvd.\n");
1158 break;
1159
1160 case SNIC_EV_DISC_CMPL:
1161 SNIC_HOST_INFO(snic->shost, "aen:DISC_CMPL Event Recvd.\n");
1162 break;
1163
1164 default:
1165 SNIC_HOST_INFO(snic->shost, "aen:Unknown Event Recvd.\n");
1166 SNIC_BUG_ON(1);
1167 break;
1168 }
1169
1170 SNIC_ASSERT_NOT_IMPL(1);
1171 } /* end of snic_aen_handler */
1172
1173 /*
1174 * snic_io_cmpl_handler
1175 * Routine to process CQ entries(IO Completions) posted by fw.
1176 */
1177 static int
1178 snic_io_cmpl_handler(struct vnic_dev *vdev,
1179 unsigned int cq_idx,
1180 struct snic_fw_req *fwreq)
1181 {
1182 struct snic *snic = svnic_dev_priv(vdev);
1183 u64 start = jiffies, cmpl_time;
1184
1185 snic_print_desc(__func__, (char *)fwreq, sizeof(*fwreq));
1186
1187 /* Update FW Stats */
1188 if ((fwreq->hdr.type >= SNIC_RSP_REPORT_TGTS_CMPL) &&
1189 (fwreq->hdr.type <= SNIC_RSP_BOOT_LUNS_CMPL))
1190 atomic64_dec(&snic->s_stats.fw.actv_reqs);
1191
1192 SNIC_BUG_ON((fwreq->hdr.type > SNIC_RSP_BOOT_LUNS_CMPL) &&
1193 (fwreq->hdr.type < SNIC_MSG_ASYNC_EVNOTIFY));
1194
1195 /* Check for snic subsys errors */
1196 switch (fwreq->hdr.status) {
1197 case SNIC_STAT_NOT_READY: /* XPT yet to initialize */
1198 SNIC_HOST_ERR(snic->shost,
1199 "sNIC SubSystem is NOT Ready.\n");
1200 break;
1201
1202 case SNIC_STAT_FATAL_ERROR: /* XPT Error */
1203 SNIC_HOST_ERR(snic->shost,
1204 "sNIC SubSystem in Unrecoverable State.\n");
1205 break;
1206 }
1207
1208 switch (fwreq->hdr.type) {
1209 case SNIC_RSP_EXCH_VER_CMPL:
1210 snic_io_exch_ver_cmpl_handler(snic, fwreq);
1211 break;
1212
1213 case SNIC_RSP_REPORT_TGTS_CMPL:
1214 snic_report_tgt_cmpl_handler(snic, fwreq);
1215 break;
1216
1217 case SNIC_RSP_ICMND_CMPL:
1218 snic_icmnd_cmpl_handler(snic, fwreq);
1219 break;
1220
1221 case SNIC_RSP_ITMF_CMPL:
1222 snic_itmf_cmpl_handler(snic, fwreq);
1223 break;
1224
1225 case SNIC_RSP_HBA_RESET_CMPL:
1226 snic_hba_reset_cmpl_handler(snic, fwreq);
1227 break;
1228
1229 case SNIC_MSG_ACK:
1230 snic_msg_ack_handler(snic, fwreq);
1231 break;
1232
1233 case SNIC_MSG_ASYNC_EVNOTIFY:
1234 snic_aen_handler(snic, fwreq);
1235 break;
1236
1237 default:
1238 SNIC_BUG_ON(1);
1239 SNIC_SCSI_DBG(snic->shost,
1240 "Unknown Firmware completion request type %d\n",
1241 fwreq->hdr.type);
1242 break;
1243 }
1244
1245 /* Update Stats */
1246 cmpl_time = jiffies - start;
1247 if (cmpl_time > atomic64_read(&snic->s_stats.io.max_cmpl_time))
1248 atomic64_set(&snic->s_stats.io.max_cmpl_time, cmpl_time);
1249
1250 return 0;
1251 } /* end of snic_io_cmpl_handler */
1252
1253 /*
1254 * snic_fwcq_cmpl_handler
1255 * Routine to process fwCQ
1256 * This CQ is independent, and not associated with wq/rq/wq_copy queues
1257 */
1258 int
1259 snic_fwcq_cmpl_handler(struct snic *snic, int io_cmpl_work)
1260 {
1261 unsigned int num_ent = 0; /* number cq entries processed */
1262 unsigned int cq_idx;
1263 unsigned int nent_per_cq;
1264 struct snic_misc_stats *misc_stats = &snic->s_stats.misc;
1265
1266 for (cq_idx = snic->wq_count; cq_idx < snic->cq_count; cq_idx++) {
1267 nent_per_cq = vnic_cq_fw_service(&snic->cq[cq_idx],
1268 snic_io_cmpl_handler,
1269 io_cmpl_work);
1270 num_ent += nent_per_cq;
1271
1272 if (nent_per_cq > atomic64_read(&misc_stats->max_cq_ents))
1273 atomic64_set(&misc_stats->max_cq_ents, nent_per_cq);
1274 }
1275
1276 return num_ent;
1277 } /* end of snic_fwcq_cmpl_handler */
1278
1279 /*
1280 * snic_queue_itmf_req: Common API to queue Task Management requests.
1281 * Use rqi->tm_tag for passing special tags.
1282 * @req_id : aborted request's tag, -1 for lun reset.
1283 */
1284 static int
1285 snic_queue_itmf_req(struct snic *snic,
1286 struct snic_host_req *tmreq,
1287 struct scsi_cmnd *sc,
1288 u32 tmf,
1289 u32 req_id)
1290 {
1291 struct snic_req_info *rqi = req_to_rqi(tmreq);
1292 struct scsi_lun lun;
1293 int tm_tag = snic_cmd_tag(sc) | rqi->tm_tag;
1294 int ret = 0;
1295
1296 SNIC_BUG_ON(!rqi);
1297 SNIC_BUG_ON(!rqi->tm_tag);
1298
1299 /* fill in lun info */
1300 int_to_scsilun(sc->device->lun, &lun);
1301
1302 /* Initialize snic_host_req: itmf */
1303 snic_itmf_init(tmreq,
1304 tm_tag,
1305 snic->config.hid,
1306 (ulong) rqi,
1307 0 /* flags */,
1308 req_id, /* Command to be aborted. */
1309 rqi->tgt_id,
1310 lun.scsi_lun,
1311 tmf);
1312
1313 /*
1314 * In case of multiple aborts on same cmd,
1315 * use try_wait_for_completion and completion_done() to check
1316 * whether it queues aborts even after completion of abort issued
1317 * prior.SNIC_BUG_ON(completion_done(&rqi->done));
1318 */
1319
1320 ret = snic_queue_wq_desc(snic, tmreq, sizeof(*tmreq));
1321 if (ret)
1322 SNIC_HOST_ERR(snic->shost,
1323 "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d tag %d Failed, ret = %d\n",
1324 tmf, sc, rqi, req_id, snic_cmd_tag(sc), ret);
1325 else
1326 SNIC_SCSI_DBG(snic->shost,
1327 "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d, tag %d (req_id)- Success.",
1328 tmf, sc, rqi, req_id, snic_cmd_tag(sc));
1329
1330 return ret;
1331 } /* end of snic_queue_itmf_req */
1332
1333 static int
1334 snic_issue_tm_req(struct snic *snic,
1335 struct snic_req_info *rqi,
1336 struct scsi_cmnd *sc,
1337 int tmf)
1338 {
1339 struct snic_host_req *tmreq = NULL;
1340 int req_id = 0, tag = snic_cmd_tag(sc);
1341 int ret = 0;
1342
1343 if (snic_get_state(snic) == SNIC_FWRESET)
1344 return -EBUSY;
1345
1346 atomic_inc(&snic->ios_inflight);
1347
1348 SNIC_SCSI_DBG(snic->shost,
1349 "issu_tmreq: Task mgmt req %d. rqi %p w/ tag %x\n",
1350 tmf, rqi, tag);
1351
1352
1353 if (tmf == SNIC_ITMF_LUN_RESET) {
1354 tmreq = snic_dr_req_init(snic, rqi);
1355 req_id = SCSI_NO_TAG;
1356 } else {
1357 tmreq = snic_abort_req_init(snic, rqi);
1358 req_id = tag;
1359 }
1360
1361 if (!tmreq) {
1362 ret = -ENOMEM;
1363
1364 goto tmreq_err;
1365 }
1366
1367 ret = snic_queue_itmf_req(snic, tmreq, sc, tmf, req_id);
1368
1369 tmreq_err:
1370 if (ret) {
1371 SNIC_HOST_ERR(snic->shost,
1372 "issu_tmreq: Queueing ITMF(%d) Req, sc %p rqi %p req_id %d tag %x fails err = %d\n",
1373 tmf, sc, rqi, req_id, tag, ret);
1374 } else {
1375 SNIC_SCSI_DBG(snic->shost,
1376 "issu_tmreq: Queueing ITMF(%d) Req, sc %p, rqi %p, req_id %d tag %x - Success.\n",
1377 tmf, sc, rqi, req_id, tag);
1378 }
1379
1380 atomic_dec(&snic->ios_inflight);
1381
1382 return ret;
1383 }
1384
1385 /*
1386 * snic_queue_abort_req : Queues abort req to WQ
1387 */
1388 static int
1389 snic_queue_abort_req(struct snic *snic,
1390 struct snic_req_info *rqi,
1391 struct scsi_cmnd *sc,
1392 int tmf)
1393 {
1394 SNIC_SCSI_DBG(snic->shost, "q_abtreq: sc %p, rqi %p, tag %x, tmf %d\n",
1395 sc, rqi, snic_cmd_tag(sc), tmf);
1396
1397 /* Add special tag for abort */
1398 rqi->tm_tag |= SNIC_TAG_ABORT;
1399
1400 return snic_issue_tm_req(snic, rqi, sc, tmf);
1401 }
1402
1403 /*
1404 * snic_abort_finish : called by snic_abort_cmd on queuing abort successfully.
1405 */
1406 static int
1407 snic_abort_finish(struct snic *snic, struct scsi_cmnd *sc)
1408 {
1409 struct snic_req_info *rqi = NULL;
1410 spinlock_t *io_lock = NULL;
1411 unsigned long flags;
1412 int ret = 0, tag = snic_cmd_tag(sc);
1413
1414 io_lock = snic_io_lock_hash(snic, sc);
1415 spin_lock_irqsave(io_lock, flags);
1416 rqi = (struct snic_req_info *) CMD_SP(sc);
1417 if (!rqi) {
1418 atomic64_inc(&snic->s_stats.io.req_null);
1419 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
1420
1421 SNIC_SCSI_DBG(snic->shost,
1422 "abt_fini:req info is null tag 0x%x, sc 0x%p flags 0x%llx\n",
1423 tag, sc, CMD_FLAGS(sc));
1424 ret = FAILED;
1425
1426 goto abort_fail;
1427 }
1428
1429 rqi->abts_done = NULL;
1430
1431 ret = FAILED;
1432
1433 /* Check the abort status. */
1434 switch (CMD_ABTS_STATUS(sc)) {
1435 case SNIC_INVALID_CODE:
1436 /* Firmware didn't complete abort req, timedout */
1437 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TIMEDOUT;
1438 atomic64_inc(&snic->s_stats.abts.drv_tmo);
1439 SNIC_SCSI_DBG(snic->shost,
1440 "abt_fini:sc %p Tag %x Driver Timeout.flags 0x%llx\n",
1441 sc, snic_cmd_tag(sc), CMD_FLAGS(sc));
1442 /* do not release snic request in timedout case */
1443 rqi = NULL;
1444
1445 goto abort_fail;
1446
1447 case SNIC_STAT_IO_SUCCESS:
1448 case SNIC_STAT_IO_NOT_FOUND:
1449 ret = SUCCESS;
1450 /*
1451 * If abort path doesn't call scsi_done(),
1452 * the # IO timeouts == 2, will cause the LUN offline.
1453 * Call scsi_done to complete the IO.
1454 */
1455 sc->result = (DID_ERROR << 16);
1456 scsi_done(sc);
1457 break;
1458
1459 default:
1460 /* Firmware completed abort with error */
1461 ret = FAILED;
1462 rqi = NULL;
1463 break;
1464 }
1465
1466 CMD_SP(sc) = NULL;
1467 SNIC_HOST_INFO(snic->shost,
1468 "abt_fini: Tag %x, Cmpl Status %s flags 0x%llx\n",
1469 tag, snic_io_status_to_str(CMD_ABTS_STATUS(sc)),
1470 CMD_FLAGS(sc));
1471
1472 abort_fail:
1473 spin_unlock_irqrestore(io_lock, flags);
1474 if (rqi)
1475 snic_release_req_buf(snic, rqi, sc);
1476
1477 return ret;
1478 } /* end of snic_abort_finish */
1479
1480 /*
1481 * snic_send_abort_and_wait : Issues Abort, and Waits
1482 */
1483 static int
1484 snic_send_abort_and_wait(struct snic *snic, struct scsi_cmnd *sc)
1485 {
1486 struct snic_req_info *rqi = NULL;
1487 enum snic_ioreq_state sv_state;
1488 struct snic_tgt *tgt = NULL;
1489 spinlock_t *io_lock = NULL;
1490 DECLARE_COMPLETION_ONSTACK(tm_done);
1491 unsigned long flags;
1492 int ret = 0, tmf = 0, tag = snic_cmd_tag(sc);
1493
1494 tgt = starget_to_tgt(scsi_target(sc->device));
1495 if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN))
1496 tmf = SNIC_ITMF_ABTS_TASK_TERM;
1497 else
1498 tmf = SNIC_ITMF_ABTS_TASK;
1499
1500 /* stats */
1501
1502 io_lock = snic_io_lock_hash(snic, sc);
1503
1504 /*
1505 * Avoid a race between SCSI issuing the abort and the device
1506 * completing the command.
1507 *
1508 * If the command is already completed by fw_cmpl code,
1509 * we just return SUCCESS from here. This means that the abort
1510 * succeeded. In the SCSI ML, since the timeout for command has
1511 * happend, the completion wont actually complete the command
1512 * and it will be considered as an aborted command
1513 *
1514 * The CMD_SP will not be cleared except while holding io_lock
1515 */
1516 spin_lock_irqsave(io_lock, flags);
1517 rqi = (struct snic_req_info *) CMD_SP(sc);
1518 if (!rqi) {
1519 spin_unlock_irqrestore(io_lock, flags);
1520
1521 SNIC_HOST_ERR(snic->shost,
1522 "abt_cmd: rqi is null. Tag %d flags 0x%llx\n",
1523 tag, CMD_FLAGS(sc));
1524
1525 ret = SUCCESS;
1526
1527 goto send_abts_end;
1528 }
1529
1530 rqi->abts_done = &tm_done;
1531 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
1532 spin_unlock_irqrestore(io_lock, flags);
1533
1534 ret = 0;
1535 goto abts_pending;
1536 }
1537 SNIC_BUG_ON(!rqi->abts_done);
1538
1539 /* Save Command State, should be restored on failed to Queue. */
1540 sv_state = CMD_STATE(sc);
1541
1542 /*
1543 * Command is still pending, need to abort it
1544 * If the fw completes the command after this point,
1545 * the completion won't be done till mid-layer, since abot
1546 * has already started.
1547 */
1548 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
1549 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
1550
1551 SNIC_SCSI_DBG(snic->shost, "send_abt_cmd: TAG 0x%x\n", tag);
1552
1553 spin_unlock_irqrestore(io_lock, flags);
1554
1555 /* Now Queue the abort command to firmware */
1556 ret = snic_queue_abort_req(snic, rqi, sc, tmf);
1557 if (ret) {
1558 atomic64_inc(&snic->s_stats.abts.q_fail);
1559 SNIC_HOST_ERR(snic->shost,
1560 "send_abt_cmd: IO w/ Tag 0x%x fail w/ err %d flags 0x%llx\n",
1561 tag, ret, CMD_FLAGS(sc));
1562
1563 spin_lock_irqsave(io_lock, flags);
1564 /* Restore Command's previous state */
1565 CMD_STATE(sc) = sv_state;
1566 rqi = (struct snic_req_info *) CMD_SP(sc);
1567 if (rqi)
1568 rqi->abts_done = NULL;
1569 spin_unlock_irqrestore(io_lock, flags);
1570 ret = FAILED;
1571
1572 goto send_abts_end;
1573 }
1574
1575 spin_lock_irqsave(io_lock, flags);
1576 if (tmf == SNIC_ITMF_ABTS_TASK) {
1577 CMD_FLAGS(sc) |= SNIC_IO_ABTS_ISSUED;
1578 atomic64_inc(&snic->s_stats.abts.num);
1579 } else {
1580 /* term stats */
1581 CMD_FLAGS(sc) |= SNIC_IO_TERM_ISSUED;
1582 }
1583 spin_unlock_irqrestore(io_lock, flags);
1584
1585 SNIC_SCSI_DBG(snic->shost,
1586 "send_abt_cmd: sc %p Tag %x flags 0x%llx\n",
1587 sc, tag, CMD_FLAGS(sc));
1588
1589
1590 ret = 0;
1591
1592 abts_pending:
1593 /*
1594 * Queued an abort IO, wait for its completion.
1595 * Once the fw completes the abort command, it will
1596 * wakeup this thread.
1597 */
1598 wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT);
1599
1600 send_abts_end:
1601 return ret;
1602 } /* end of snic_send_abort_and_wait */
1603
1604 /*
1605 * This function is exported to SCSI for sending abort cmnds.
1606 * A SCSI IO is represent by snic_ioreq in the driver.
1607 * The snic_ioreq is linked to the SCSI Cmd, thus a link with the ULP'S IO
1608 */
1609 int
1610 snic_abort_cmd(struct scsi_cmnd *sc)
1611 {
1612 struct snic *snic = shost_priv(sc->device->host);
1613 int ret = SUCCESS, tag = snic_cmd_tag(sc);
1614 u32 start_time = jiffies;
1615
1616 SNIC_SCSI_DBG(snic->shost, "abt_cmd:sc %p :0x%x :req = %p :tag = %d\n",
1617 sc, sc->cmnd[0], scsi_cmd_to_rq(sc), tag);
1618
1619 if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) {
1620 SNIC_HOST_ERR(snic->shost,
1621 "abt_cmd: tag %x Parent Devs are not rdy\n",
1622 tag);
1623 ret = FAST_IO_FAIL;
1624
1625 goto abort_end;
1626 }
1627
1628
1629 ret = snic_send_abort_and_wait(snic, sc);
1630 if (ret)
1631 goto abort_end;
1632
1633 ret = snic_abort_finish(snic, sc);
1634
1635 abort_end:
1636 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
1637 jiffies_to_msecs(jiffies - start_time), 0,
1638 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
1639
1640 SNIC_SCSI_DBG(snic->shost,
1641 "abts: Abort Req Status = %s\n",
1642 (ret == SUCCESS) ? "SUCCESS" :
1643 ((ret == FAST_IO_FAIL) ? "FAST_IO_FAIL" : "FAILED"));
1644
1645 return ret;
1646 }
1647
1648
1649
1650 static int
1651 snic_is_abts_pending(struct snic *snic, struct scsi_cmnd *lr_sc)
1652 {
1653 struct snic_req_info *rqi = NULL;
1654 struct scsi_cmnd *sc = NULL;
1655 struct scsi_device *lr_sdev = NULL;
1656 spinlock_t *io_lock = NULL;
1657 u32 tag;
1658 unsigned long flags;
1659
1660 if (lr_sc)
1661 lr_sdev = lr_sc->device;
1662
1663 /* walk through the tag map, an dcheck if IOs are still pending in fw*/
1664 for (tag = 0; tag < snic->max_tag_id; tag++) {
1665 io_lock = snic_io_lock_tag(snic, tag);
1666
1667 spin_lock_irqsave(io_lock, flags);
1668 sc = scsi_host_find_tag(snic->shost, tag);
1669
1670 if (!sc || (lr_sc && (sc->device != lr_sdev || sc == lr_sc))) {
1671 spin_unlock_irqrestore(io_lock, flags);
1672
1673 continue;
1674 }
1675
1676 rqi = (struct snic_req_info *) CMD_SP(sc);
1677 if (!rqi) {
1678 spin_unlock_irqrestore(io_lock, flags);
1679
1680 continue;
1681 }
1682
1683 /*
1684 * Found IO that is still pending w/ firmware and belongs to
1685 * the LUN that is under reset, if lr_sc != NULL
1686 */
1687 SNIC_SCSI_DBG(snic->shost, "Found IO in %s on LUN\n",
1688 snic_ioreq_state_to_str(CMD_STATE(sc)));
1689
1690 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
1691 spin_unlock_irqrestore(io_lock, flags);
1692
1693 return 1;
1694 }
1695
1696 spin_unlock_irqrestore(io_lock, flags);
1697 }
1698
1699 return 0;
1700 } /* end of snic_is_abts_pending */
1701
1702 static int
1703 snic_dr_clean_single_req(struct snic *snic,
1704 u32 tag,
1705 struct scsi_device *lr_sdev)
1706 {
1707 struct snic_req_info *rqi = NULL;
1708 struct snic_tgt *tgt = NULL;
1709 struct scsi_cmnd *sc = NULL;
1710 spinlock_t *io_lock = NULL;
1711 u32 sv_state = 0, tmf = 0;
1712 DECLARE_COMPLETION_ONSTACK(tm_done);
1713 unsigned long flags;
1714 int ret = 0;
1715
1716 io_lock = snic_io_lock_tag(snic, tag);
1717 spin_lock_irqsave(io_lock, flags);
1718 sc = scsi_host_find_tag(snic->shost, tag);
1719
1720 /* Ignore Cmd that don't belong to Lun Reset device */
1721 if (!sc || sc->device != lr_sdev)
1722 goto skip_clean;
1723
1724 rqi = (struct snic_req_info *) CMD_SP(sc);
1725
1726 if (!rqi)
1727 goto skip_clean;
1728
1729
1730 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
1731 goto skip_clean;
1732
1733
1734 if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) &&
1735 (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) {
1736
1737 SNIC_SCSI_DBG(snic->shost,
1738 "clean_single_req: devrst is not pending sc 0x%p\n",
1739 sc);
1740
1741 goto skip_clean;
1742 }
1743
1744 SNIC_SCSI_DBG(snic->shost,
1745 "clean_single_req: Found IO in %s on lun\n",
1746 snic_ioreq_state_to_str(CMD_STATE(sc)));
1747
1748 /* Save Command State */
1749 sv_state = CMD_STATE(sc);
1750
1751 /*
1752 * Any pending IO issued prior to reset is expected to be
1753 * in abts pending state, if not we need to set SNIC_IOREQ_ABTS_PENDING
1754 * to indicate the IO is abort pending.
1755 * When IO is completed, the IO will be handed over and handled
1756 * in this function.
1757 */
1758
1759 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
1760 SNIC_BUG_ON(rqi->abts_done);
1761
1762 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) {
1763 rqi->tm_tag = SNIC_TAG_DEV_RST;
1764
1765 SNIC_SCSI_DBG(snic->shost,
1766 "clean_single_req:devrst sc 0x%p\n", sc);
1767 }
1768
1769 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
1770 rqi->abts_done = &tm_done;
1771 spin_unlock_irqrestore(io_lock, flags);
1772
1773 tgt = starget_to_tgt(scsi_target(sc->device));
1774 if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN))
1775 tmf = SNIC_ITMF_ABTS_TASK_TERM;
1776 else
1777 tmf = SNIC_ITMF_ABTS_TASK;
1778
1779 /* Now queue the abort command to firmware */
1780 ret = snic_queue_abort_req(snic, rqi, sc, tmf);
1781 if (ret) {
1782 SNIC_HOST_ERR(snic->shost,
1783 "clean_single_req_err:sc %p, tag %d abt failed. tm_tag %d flags 0x%llx\n",
1784 sc, tag, rqi->tm_tag, CMD_FLAGS(sc));
1785
1786 spin_lock_irqsave(io_lock, flags);
1787 rqi = (struct snic_req_info *) CMD_SP(sc);
1788 if (rqi)
1789 rqi->abts_done = NULL;
1790
1791 /* Restore Command State */
1792 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
1793 CMD_STATE(sc) = sv_state;
1794
1795 ret = 1;
1796 goto skip_clean;
1797 }
1798
1799 spin_lock_irqsave(io_lock, flags);
1800 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET)
1801 CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED;
1802
1803 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED;
1804 spin_unlock_irqrestore(io_lock, flags);
1805
1806 wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT);
1807
1808 /* Recheck cmd state to check if it now aborted. */
1809 spin_lock_irqsave(io_lock, flags);
1810 rqi = (struct snic_req_info *) CMD_SP(sc);
1811 if (!rqi) {
1812 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
1813 goto skip_clean;
1814 }
1815 rqi->abts_done = NULL;
1816
1817 /* if abort is still pending w/ fw, fail */
1818 if (CMD_ABTS_STATUS(sc) == SNIC_INVALID_CODE) {
1819 SNIC_HOST_ERR(snic->shost,
1820 "clean_single_req_err:sc %p tag %d abt still pending w/ fw, tm_tag %d flags 0x%llx\n",
1821 sc, tag, rqi->tm_tag, CMD_FLAGS(sc));
1822
1823 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE;
1824 ret = 1;
1825
1826 goto skip_clean;
1827 }
1828
1829 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
1830 CMD_SP(sc) = NULL;
1831 spin_unlock_irqrestore(io_lock, flags);
1832
1833 snic_release_req_buf(snic, rqi, sc);
1834
1835 sc->result = (DID_ERROR << 16);
1836 scsi_done(sc);
1837
1838 ret = 0;
1839
1840 return ret;
1841
1842 skip_clean:
1843 spin_unlock_irqrestore(io_lock, flags);
1844
1845 return ret;
1846 } /* end of snic_dr_clean_single_req */
1847
1848 static int
1849 snic_dr_clean_pending_req(struct snic *snic, struct scsi_cmnd *lr_sc)
1850 {
1851 struct scsi_device *lr_sdev = lr_sc->device;
1852 u32 tag = 0;
1853 int ret;
1854
1855 for (tag = 0; tag < snic->max_tag_id; tag++) {
1856 if (tag == snic_cmd_tag(lr_sc))
1857 continue;
1858
1859 ret = snic_dr_clean_single_req(snic, tag, lr_sdev);
1860 if (ret) {
1861 SNIC_HOST_ERR(snic->shost, "clean_err:tag = %d\n", tag);
1862 goto clean_err;
1863 }
1864 }
1865
1866 schedule_timeout(msecs_to_jiffies(100));
1867
1868 /* Walk through all the cmds and check abts status. */
1869 if (snic_is_abts_pending(snic, lr_sc))
1870 goto clean_err;
1871
1872 SNIC_SCSI_DBG(snic->shost, "clean_pending_req: Success.\n");
1873
1874 return 0;
1875
1876 clean_err:
1877 SNIC_HOST_ERR(snic->shost,
1878 "Failed to Clean Pending IOs on %s device.\n",
1879 dev_name(&lr_sdev->sdev_gendev));
1880
1881 return FAILED;
1882
1883 } /* end of snic_dr_clean_pending_req */
1884
1885 /*
1886 * snic_dr_finish : Called by snic_device_reset
1887 */
1888 static int
1889 snic_dr_finish(struct snic *snic, struct scsi_cmnd *sc)
1890 {
1891 struct snic_req_info *rqi = NULL;
1892 spinlock_t *io_lock = NULL;
1893 unsigned long flags;
1894 int lr_res = 0;
1895 int ret = FAILED;
1896
1897 io_lock = snic_io_lock_hash(snic, sc);
1898 spin_lock_irqsave(io_lock, flags);
1899 rqi = (struct snic_req_info *) CMD_SP(sc);
1900 if (!rqi) {
1901 spin_unlock_irqrestore(io_lock, flags);
1902 SNIC_SCSI_DBG(snic->shost,
1903 "dr_fini: rqi is null tag 0x%x sc 0x%p flags 0x%llx\n",
1904 snic_cmd_tag(sc), sc, CMD_FLAGS(sc));
1905
1906 ret = FAILED;
1907 goto dr_fini_end;
1908 }
1909
1910 rqi->dr_done = NULL;
1911
1912 lr_res = CMD_LR_STATUS(sc);
1913
1914 switch (lr_res) {
1915 case SNIC_INVALID_CODE:
1916 /* stats */
1917 SNIC_SCSI_DBG(snic->shost,
1918 "dr_fini: Tag %x Dev Reset Timedout. flags 0x%llx\n",
1919 snic_cmd_tag(sc), CMD_FLAGS(sc));
1920
1921 CMD_FLAGS(sc) |= SNIC_DEV_RST_TIMEDOUT;
1922 ret = FAILED;
1923
1924 goto dr_failed;
1925
1926 case SNIC_STAT_IO_SUCCESS:
1927 SNIC_SCSI_DBG(snic->shost,
1928 "dr_fini: Tag %x Dev Reset cmpl\n",
1929 snic_cmd_tag(sc));
1930 ret = 0;
1931 break;
1932
1933 default:
1934 SNIC_HOST_ERR(snic->shost,
1935 "dr_fini:Device Reset completed& failed.Tag = %x lr_status %s flags 0x%llx\n",
1936 snic_cmd_tag(sc),
1937 snic_io_status_to_str(lr_res), CMD_FLAGS(sc));
1938 ret = FAILED;
1939 goto dr_failed;
1940 }
1941 spin_unlock_irqrestore(io_lock, flags);
1942
1943 /*
1944 * Cleanup any IOs on this LUN that have still not completed.
1945 * If any of these fail, then LUN Reset fails.
1946 * Cleanup cleans all commands on this LUN except
1947 * the lun reset command. If all cmds get cleaned, the LUN Reset
1948 * succeeds.
1949 */
1950
1951 ret = snic_dr_clean_pending_req(snic, sc);
1952 if (ret) {
1953 spin_lock_irqsave(io_lock, flags);
1954 SNIC_SCSI_DBG(snic->shost,
1955 "dr_fini: Device Reset Failed since could not abort all IOs. Tag = %x.\n",
1956 snic_cmd_tag(sc));
1957 rqi = (struct snic_req_info *) CMD_SP(sc);
1958
1959 goto dr_failed;
1960 } else {
1961 /* Cleanup LUN Reset Command */
1962 spin_lock_irqsave(io_lock, flags);
1963 rqi = (struct snic_req_info *) CMD_SP(sc);
1964 if (rqi)
1965 ret = SUCCESS; /* Completed Successfully */
1966 else
1967 ret = FAILED;
1968 }
1969
1970 dr_failed:
1971 lockdep_assert_held(io_lock);
1972 if (rqi)
1973 CMD_SP(sc) = NULL;
1974 spin_unlock_irqrestore(io_lock, flags);
1975
1976 if (rqi)
1977 snic_release_req_buf(snic, rqi, sc);
1978
1979 dr_fini_end:
1980 return ret;
1981 } /* end of snic_dr_finish */
1982
1983 static int
1984 snic_queue_dr_req(struct snic *snic,
1985 struct snic_req_info *rqi,
1986 struct scsi_cmnd *sc)
1987 {
1988 /* Add special tag for device reset */
1989 rqi->tm_tag |= SNIC_TAG_DEV_RST;
1990
1991 return snic_issue_tm_req(snic, rqi, sc, SNIC_ITMF_LUN_RESET);
1992 }
1993
1994 static int
1995 snic_send_dr_and_wait(struct snic *snic, struct scsi_cmnd *sc)
1996 {
1997 struct snic_req_info *rqi = NULL;
1998 enum snic_ioreq_state sv_state;
1999 spinlock_t *io_lock = NULL;
2000 unsigned long flags;
2001 DECLARE_COMPLETION_ONSTACK(tm_done);
2002 int ret = FAILED, tag = snic_cmd_tag(sc);
2003
2004 io_lock = snic_io_lock_hash(snic, sc);
2005 spin_lock_irqsave(io_lock, flags);
2006 CMD_FLAGS(sc) |= SNIC_DEVICE_RESET;
2007 rqi = (struct snic_req_info *) CMD_SP(sc);
2008 if (!rqi) {
2009 SNIC_HOST_ERR(snic->shost,
2010 "send_dr: rqi is null, Tag 0x%x flags 0x%llx\n",
2011 tag, CMD_FLAGS(sc));
2012 spin_unlock_irqrestore(io_lock, flags);
2013
2014 ret = FAILED;
2015 goto send_dr_end;
2016 }
2017
2018 /* Save Command state to restore in case Queuing failed. */
2019 sv_state = CMD_STATE(sc);
2020
2021 CMD_STATE(sc) = SNIC_IOREQ_LR_PENDING;
2022 CMD_LR_STATUS(sc) = SNIC_INVALID_CODE;
2023
2024 SNIC_SCSI_DBG(snic->shost, "dr: TAG = %x\n", tag);
2025
2026 rqi->dr_done = &tm_done;
2027 SNIC_BUG_ON(!rqi->dr_done);
2028
2029 spin_unlock_irqrestore(io_lock, flags);
2030 /*
2031 * The Command state is changed to IOREQ_PENDING,
2032 * in this case, if the command is completed, the icmnd_cmpl will
2033 * mark the cmd as completed.
2034 * This logic still makes LUN Reset is inevitable.
2035 */
2036
2037 ret = snic_queue_dr_req(snic, rqi, sc);
2038 if (ret) {
2039 SNIC_HOST_ERR(snic->shost,
2040 "send_dr: IO w/ Tag 0x%x Failed err = %d. flags 0x%llx\n",
2041 tag, ret, CMD_FLAGS(sc));
2042
2043 spin_lock_irqsave(io_lock, flags);
2044 /* Restore State */
2045 CMD_STATE(sc) = sv_state;
2046 rqi = (struct snic_req_info *) CMD_SP(sc);
2047 if (rqi)
2048 rqi->dr_done = NULL;
2049 /* rqi is freed in caller. */
2050 spin_unlock_irqrestore(io_lock, flags);
2051 ret = FAILED;
2052
2053 goto send_dr_end;
2054 }
2055
2056 spin_lock_irqsave(io_lock, flags);
2057 CMD_FLAGS(sc) |= SNIC_DEV_RST_ISSUED;
2058 spin_unlock_irqrestore(io_lock, flags);
2059
2060 ret = 0;
2061
2062 wait_for_completion_timeout(&tm_done, SNIC_LUN_RESET_TIMEOUT);
2063
2064 send_dr_end:
2065 return ret;
2066 }
2067
2068 /*
2069 * auxillary funciton to check lun reset op is supported or not
2070 * Not supported if returns 0
2071 */
2072 static int
2073 snic_dev_reset_supported(struct scsi_device *sdev)
2074 {
2075 struct snic_tgt *tgt = starget_to_tgt(scsi_target(sdev));
2076
2077 if (tgt->tdata.typ == SNIC_TGT_DAS)
2078 return 0;
2079
2080 return 1;
2081 }
2082
2083 static void
2084 snic_unlink_and_release_req(struct snic *snic, struct scsi_cmnd *sc, int flag)
2085 {
2086 struct snic_req_info *rqi = NULL;
2087 spinlock_t *io_lock = NULL;
2088 unsigned long flags;
2089 u32 start_time = jiffies;
2090
2091 io_lock = snic_io_lock_hash(snic, sc);
2092 spin_lock_irqsave(io_lock, flags);
2093 rqi = (struct snic_req_info *) CMD_SP(sc);
2094 if (rqi) {
2095 start_time = rqi->start_time;
2096 CMD_SP(sc) = NULL;
2097 }
2098
2099 CMD_FLAGS(sc) |= flag;
2100 spin_unlock_irqrestore(io_lock, flags);
2101
2102 if (rqi)
2103 snic_release_req_buf(snic, rqi, sc);
2104
2105 SNIC_TRC(snic->shost->host_no, snic_cmd_tag(sc), (ulong) sc,
2106 jiffies_to_msecs(jiffies - start_time), (ulong) rqi,
2107 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
2108 }
2109
2110 /*
2111 * SCSI Eh thread issues a LUN Reset when one or more commands on a LUN
2112 * fail to get aborted. It calls driver's eh_device_reset with a SCSI
2113 * command on the LUN.
2114 */
2115 int
2116 snic_device_reset(struct scsi_cmnd *sc)
2117 {
2118 struct Scsi_Host *shost = sc->device->host;
2119 struct snic *snic = shost_priv(shost);
2120 struct snic_req_info *rqi = NULL;
2121 int tag = snic_cmd_tag(sc);
2122 int start_time = jiffies;
2123 int ret = FAILED;
2124 int dr_supp = 0;
2125
2126 SNIC_SCSI_DBG(shost, "dev_reset:sc %p :0x%x :req = %p :tag = %d\n",
2127 sc, sc->cmnd[0], scsi_cmd_to_rq(sc),
2128 snic_cmd_tag(sc));
2129 dr_supp = snic_dev_reset_supported(sc->device);
2130 if (!dr_supp) {
2131 /* device reset op is not supported */
2132 SNIC_HOST_INFO(shost, "LUN Reset Op not supported.\n");
2133 snic_unlink_and_release_req(snic, sc, SNIC_DEV_RST_NOTSUP);
2134
2135 goto dev_rst_end;
2136 }
2137
2138 if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) {
2139 snic_unlink_and_release_req(snic, sc, 0);
2140 SNIC_HOST_ERR(shost, "Devrst: Parent Devs are not online.\n");
2141
2142 goto dev_rst_end;
2143 }
2144
2145 /* There is no tag when lun reset is issue through ioctl. */
2146 if (unlikely(tag <= SNIC_NO_TAG)) {
2147 SNIC_HOST_INFO(snic->shost,
2148 "Devrst: LUN Reset Recvd thru IOCTL.\n");
2149
2150 rqi = snic_req_init(snic, 0);
2151 if (!rqi)
2152 goto dev_rst_end;
2153
2154 memset(scsi_cmd_priv(sc), 0,
2155 sizeof(struct snic_internal_io_state));
2156 CMD_SP(sc) = (char *)rqi;
2157 CMD_FLAGS(sc) = SNIC_NO_FLAGS;
2158
2159 /* Add special tag for dr coming from user spc */
2160 rqi->tm_tag = SNIC_TAG_IOCTL_DEV_RST;
2161 rqi->sc = sc;
2162 }
2163
2164 ret = snic_send_dr_and_wait(snic, sc);
2165 if (ret) {
2166 SNIC_HOST_ERR(snic->shost,
2167 "Devrst: IO w/ Tag %x Failed w/ err = %d\n",
2168 tag, ret);
2169
2170 snic_unlink_and_release_req(snic, sc, 0);
2171
2172 goto dev_rst_end;
2173 }
2174
2175 ret = snic_dr_finish(snic, sc);
2176
2177 dev_rst_end:
2178 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
2179 jiffies_to_msecs(jiffies - start_time),
2180 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
2181
2182 SNIC_SCSI_DBG(snic->shost,
2183 "Devrst: Returning from Device Reset : %s\n",
2184 (ret == SUCCESS) ? "SUCCESS" : "FAILED");
2185
2186 return ret;
2187 } /* end of snic_device_reset */
2188
2189 /*
2190 * SCSI Error handling calls driver's eh_host_reset if all prior
2191 * error handling levels return FAILED.
2192 *
2193 * Host Reset is the highest level of error recovery. If this fails, then
2194 * host is offlined by SCSI.
2195 */
2196 /*
2197 * snic_issue_hba_reset : Queues FW Reset Request.
2198 */
2199 static int
2200 snic_issue_hba_reset(struct snic *snic, struct scsi_cmnd *sc)
2201 {
2202 struct snic_req_info *rqi = NULL;
2203 struct snic_host_req *req = NULL;
2204 spinlock_t *io_lock = NULL;
2205 DECLARE_COMPLETION_ONSTACK(wait);
2206 unsigned long flags;
2207 int ret = -ENOMEM;
2208
2209 rqi = snic_req_init(snic, 0);
2210 if (!rqi) {
2211 ret = -ENOMEM;
2212
2213 goto hba_rst_end;
2214 }
2215
2216 if (snic_cmd_tag(sc) == SCSI_NO_TAG) {
2217 memset(scsi_cmd_priv(sc), 0,
2218 sizeof(struct snic_internal_io_state));
2219 SNIC_HOST_INFO(snic->shost, "issu_hr:Host reset thru ioctl.\n");
2220 rqi->sc = sc;
2221 }
2222
2223 req = rqi_to_req(rqi);
2224
2225 io_lock = snic_io_lock_hash(snic, sc);
2226 spin_lock_irqsave(io_lock, flags);
2227 SNIC_BUG_ON(CMD_SP(sc) != NULL);
2228 CMD_STATE(sc) = SNIC_IOREQ_PENDING;
2229 CMD_SP(sc) = (char *) rqi;
2230 CMD_FLAGS(sc) |= SNIC_IO_INITIALIZED;
2231 snic->remove_wait = &wait;
2232 spin_unlock_irqrestore(io_lock, flags);
2233
2234 /* Initialize Request */
2235 snic_io_hdr_enc(&req->hdr, SNIC_REQ_HBA_RESET, 0, snic_cmd_tag(sc),
2236 snic->config.hid, 0, (ulong) rqi);
2237
2238 req->u.reset.flags = 0;
2239
2240 ret = snic_queue_wq_desc(snic, req, sizeof(*req));
2241 if (ret) {
2242 SNIC_HOST_ERR(snic->shost,
2243 "issu_hr:Queuing HBA Reset Failed. w err %d\n",
2244 ret);
2245
2246 goto hba_rst_err;
2247 }
2248
2249 spin_lock_irqsave(io_lock, flags);
2250 CMD_FLAGS(sc) |= SNIC_HOST_RESET_ISSUED;
2251 spin_unlock_irqrestore(io_lock, flags);
2252 atomic64_inc(&snic->s_stats.reset.hba_resets);
2253 SNIC_HOST_INFO(snic->shost, "Queued HBA Reset Successfully.\n");
2254
2255 wait_for_completion_timeout(snic->remove_wait,
2256 SNIC_HOST_RESET_TIMEOUT);
2257
2258 if (snic_get_state(snic) == SNIC_FWRESET) {
2259 SNIC_HOST_ERR(snic->shost, "reset_cmpl: Reset Timedout.\n");
2260 ret = -ETIMEDOUT;
2261
2262 goto hba_rst_err;
2263 }
2264
2265 spin_lock_irqsave(io_lock, flags);
2266 snic->remove_wait = NULL;
2267 rqi = (struct snic_req_info *) CMD_SP(sc);
2268 CMD_SP(sc) = NULL;
2269 spin_unlock_irqrestore(io_lock, flags);
2270
2271 if (rqi)
2272 snic_req_free(snic, rqi);
2273
2274 ret = 0;
2275
2276 return ret;
2277
2278 hba_rst_err:
2279 spin_lock_irqsave(io_lock, flags);
2280 snic->remove_wait = NULL;
2281 rqi = (struct snic_req_info *) CMD_SP(sc);
2282 CMD_SP(sc) = NULL;
2283 spin_unlock_irqrestore(io_lock, flags);
2284
2285 if (rqi)
2286 snic_req_free(snic, rqi);
2287
2288 hba_rst_end:
2289 SNIC_HOST_ERR(snic->shost,
2290 "reset:HBA Reset Failed w/ err = %d.\n",
2291 ret);
2292
2293 return ret;
2294 } /* end of snic_issue_hba_reset */
2295
2296 int
2297 snic_reset(struct Scsi_Host *shost, struct scsi_cmnd *sc)
2298 {
2299 struct snic *snic = shost_priv(shost);
2300 enum snic_state sv_state;
2301 unsigned long flags;
2302 int ret = FAILED;
2303
2304 /* Set snic state as SNIC_FWRESET*/
2305 sv_state = snic_get_state(snic);
2306
2307 spin_lock_irqsave(&snic->snic_lock, flags);
2308 if (snic_get_state(snic) == SNIC_FWRESET) {
2309 spin_unlock_irqrestore(&snic->snic_lock, flags);
2310 SNIC_HOST_INFO(shost, "reset:prev reset is in progress\n");
2311
2312 msleep(SNIC_HOST_RESET_TIMEOUT);
2313 ret = SUCCESS;
2314
2315 goto reset_end;
2316 }
2317
2318 snic_set_state(snic, SNIC_FWRESET);
2319 spin_unlock_irqrestore(&snic->snic_lock, flags);
2320
2321
2322 /* Wait for all the IOs that are entered in Qcmd */
2323 while (atomic_read(&snic->ios_inflight))
2324 schedule_timeout(msecs_to_jiffies(1));
2325
2326 ret = snic_issue_hba_reset(snic, sc);
2327 if (ret) {
2328 SNIC_HOST_ERR(shost,
2329 "reset:Host Reset Failed w/ err %d.\n",
2330 ret);
2331 spin_lock_irqsave(&snic->snic_lock, flags);
2332 snic_set_state(snic, sv_state);
2333 spin_unlock_irqrestore(&snic->snic_lock, flags);
2334 atomic64_inc(&snic->s_stats.reset.hba_reset_fail);
2335 ret = FAILED;
2336
2337 goto reset_end;
2338 }
2339
2340 ret = SUCCESS;
2341
2342 reset_end:
2343 return ret;
2344 } /* end of snic_reset */
2345
2346 /*
2347 * SCSI Error handling calls driver's eh_host_reset if all prior
2348 * error handling levels return FAILED.
2349 *
2350 * Host Reset is the highest level of error recovery. If this fails, then
2351 * host is offlined by SCSI.
2352 */
2353 int
2354 snic_host_reset(struct scsi_cmnd *sc)
2355 {
2356 struct Scsi_Host *shost = sc->device->host;
2357 u32 start_time = jiffies;
2358 int ret;
2359
2360 SNIC_SCSI_DBG(shost,
2361 "host reset:sc %p sc_cmd 0x%x req %p tag %d flags 0x%llx\n",
2362 sc, sc->cmnd[0], scsi_cmd_to_rq(sc),
2363 snic_cmd_tag(sc), CMD_FLAGS(sc));
2364
2365 ret = snic_reset(shost, sc);
2366
2367 SNIC_TRC(shost->host_no, snic_cmd_tag(sc), (ulong) sc,
2368 jiffies_to_msecs(jiffies - start_time),
2369 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
2370
2371 return ret;
2372 } /* end of snic_host_reset */
2373
2374 /*
2375 * snic_cmpl_pending_tmreq : Caller should hold io_lock
2376 */
2377 static void
2378 snic_cmpl_pending_tmreq(struct snic *snic, struct scsi_cmnd *sc)
2379 {
2380 struct snic_req_info *rqi = NULL;
2381
2382 SNIC_SCSI_DBG(snic->shost,
2383 "Completing Pending TM Req sc %p, state %s flags 0x%llx\n",
2384 sc, snic_io_status_to_str(CMD_STATE(sc)), CMD_FLAGS(sc));
2385
2386 /*
2387 * CASE : FW didn't post itmf completion due to PCIe Errors.
2388 * Marking the abort status as Success to call scsi completion
2389 * in snic_abort_finish()
2390 */
2391 CMD_ABTS_STATUS(sc) = SNIC_STAT_IO_SUCCESS;
2392
2393 rqi = (struct snic_req_info *) CMD_SP(sc);
2394 if (!rqi)
2395 return;
2396
2397 if (rqi->dr_done)
2398 complete(rqi->dr_done);
2399 else if (rqi->abts_done)
2400 complete(rqi->abts_done);
2401 }
2402
2403 /*
2404 * snic_scsi_cleanup: Walks through tag map and releases the reqs
2405 */
2406 static void
2407 snic_scsi_cleanup(struct snic *snic, int ex_tag)
2408 {
2409 struct snic_req_info *rqi = NULL;
2410 struct scsi_cmnd *sc = NULL;
2411 spinlock_t *io_lock = NULL;
2412 unsigned long flags;
2413 int tag;
2414 u64 st_time = 0;
2415
2416 SNIC_SCSI_DBG(snic->shost, "sc_clean: scsi cleanup.\n");
2417
2418 for (tag = 0; tag < snic->max_tag_id; tag++) {
2419 /* Skip ex_tag */
2420 if (tag == ex_tag)
2421 continue;
2422
2423 io_lock = snic_io_lock_tag(snic, tag);
2424 spin_lock_irqsave(io_lock, flags);
2425 sc = scsi_host_find_tag(snic->shost, tag);
2426 if (!sc) {
2427 spin_unlock_irqrestore(io_lock, flags);
2428
2429 continue;
2430 }
2431
2432 if (unlikely(snic_tmreq_pending(sc))) {
2433 /*
2434 * When FW Completes reset w/o sending completions
2435 * for outstanding ios.
2436 */
2437 snic_cmpl_pending_tmreq(snic, sc);
2438 spin_unlock_irqrestore(io_lock, flags);
2439
2440 continue;
2441 }
2442
2443 rqi = (struct snic_req_info *) CMD_SP(sc);
2444 if (!rqi) {
2445 spin_unlock_irqrestore(io_lock, flags);
2446
2447 goto cleanup;
2448 }
2449
2450 SNIC_SCSI_DBG(snic->shost,
2451 "sc_clean: sc %p, rqi %p, tag %d flags 0x%llx\n",
2452 sc, rqi, tag, CMD_FLAGS(sc));
2453
2454 CMD_SP(sc) = NULL;
2455 CMD_FLAGS(sc) |= SNIC_SCSI_CLEANUP;
2456 spin_unlock_irqrestore(io_lock, flags);
2457 st_time = rqi->start_time;
2458
2459 SNIC_HOST_INFO(snic->shost,
2460 "sc_clean: Releasing rqi %p : flags 0x%llx\n",
2461 rqi, CMD_FLAGS(sc));
2462
2463 snic_release_req_buf(snic, rqi, sc);
2464
2465 cleanup:
2466 sc->result = DID_TRANSPORT_DISRUPTED << 16;
2467 SNIC_HOST_INFO(snic->shost,
2468 "sc_clean: DID_TRANSPORT_DISRUPTED for sc %p, Tag %d flags 0x%llx rqi %p duration %u msecs\n",
2469 sc, scsi_cmd_to_rq(sc)->tag, CMD_FLAGS(sc), rqi,
2470 jiffies_to_msecs(jiffies - st_time));
2471
2472 /* Update IO stats */
2473 snic_stats_update_io_cmpl(&snic->s_stats);
2474
2475 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
2476 jiffies_to_msecs(jiffies - st_time), 0,
2477 SNIC_TRC_CMD(sc),
2478 SNIC_TRC_CMD_STATE_FLAGS(sc));
2479
2480 scsi_done(sc);
2481 }
2482 } /* end of snic_scsi_cleanup */
2483
2484 void
2485 snic_shutdown_scsi_cleanup(struct snic *snic)
2486 {
2487 SNIC_HOST_INFO(snic->shost, "Shutdown time SCSI Cleanup.\n");
2488
2489 snic_scsi_cleanup(snic, SCSI_NO_TAG);
2490 } /* end of snic_shutdown_scsi_cleanup */
2491
2492 /*
2493 * snic_internal_abort_io
2494 * called by : snic_tgt_scsi_abort_io
2495 */
2496 static int
2497 snic_internal_abort_io(struct snic *snic, struct scsi_cmnd *sc, int tmf)
2498 {
2499 struct snic_req_info *rqi = NULL;
2500 spinlock_t *io_lock = NULL;
2501 unsigned long flags;
2502 u32 sv_state = 0;
2503 int ret = 0;
2504
2505 io_lock = snic_io_lock_hash(snic, sc);
2506 spin_lock_irqsave(io_lock, flags);
2507 rqi = (struct snic_req_info *) CMD_SP(sc);
2508 if (!rqi)
2509 goto skip_internal_abts;
2510
2511 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
2512 goto skip_internal_abts;
2513
2514 if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) &&
2515 (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) {
2516
2517 SNIC_SCSI_DBG(snic->shost,
2518 "internal_abts: dev rst not pending sc 0x%p\n",
2519 sc);
2520
2521 goto skip_internal_abts;
2522 }
2523
2524
2525 if (!(CMD_FLAGS(sc) & SNIC_IO_ISSUED)) {
2526 SNIC_SCSI_DBG(snic->shost,
2527 "internal_abts: IO not yet issued sc 0x%p tag 0x%x flags 0x%llx state %d\n",
2528 sc, snic_cmd_tag(sc), CMD_FLAGS(sc), CMD_STATE(sc));
2529
2530 goto skip_internal_abts;
2531 }
2532
2533 sv_state = CMD_STATE(sc);
2534 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
2535 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
2536 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_PENDING;
2537
2538 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) {
2539 /* stats */
2540 rqi->tm_tag = SNIC_TAG_DEV_RST;
2541 SNIC_SCSI_DBG(snic->shost, "internal_abts:dev rst sc %p\n", sc);
2542 }
2543
2544 SNIC_SCSI_DBG(snic->shost, "internal_abts: Issuing abts tag %x\n",
2545 snic_cmd_tag(sc));
2546 SNIC_BUG_ON(rqi->abts_done);
2547 spin_unlock_irqrestore(io_lock, flags);
2548
2549 ret = snic_queue_abort_req(snic, rqi, sc, tmf);
2550 if (ret) {
2551 SNIC_HOST_ERR(snic->shost,
2552 "internal_abts: Tag = %x , Failed w/ err = %d\n",
2553 snic_cmd_tag(sc), ret);
2554
2555 spin_lock_irqsave(io_lock, flags);
2556
2557 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
2558 CMD_STATE(sc) = sv_state;
2559
2560 goto skip_internal_abts;
2561 }
2562
2563 spin_lock_irqsave(io_lock, flags);
2564 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET)
2565 CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED;
2566 else
2567 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED;
2568
2569 ret = SUCCESS;
2570
2571 skip_internal_abts:
2572 lockdep_assert_held(io_lock);
2573 spin_unlock_irqrestore(io_lock, flags);
2574
2575 return ret;
2576 } /* end of snic_internal_abort_io */
2577
2578 /*
2579 * snic_tgt_scsi_abort_io : called by snic_tgt_del
2580 */
2581 int
2582 snic_tgt_scsi_abort_io(struct snic_tgt *tgt)
2583 {
2584 struct snic *snic = NULL;
2585 struct scsi_cmnd *sc = NULL;
2586 struct snic_tgt *sc_tgt = NULL;
2587 spinlock_t *io_lock = NULL;
2588 unsigned long flags;
2589 int ret = 0, tag, abt_cnt = 0, tmf = 0;
2590
2591 if (!tgt)
2592 return -1;
2593
2594 snic = shost_priv(snic_tgt_to_shost(tgt));
2595 SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: Cleaning Pending IOs.\n");
2596
2597 if (tgt->tdata.typ == SNIC_TGT_DAS)
2598 tmf = SNIC_ITMF_ABTS_TASK;
2599 else
2600 tmf = SNIC_ITMF_ABTS_TASK_TERM;
2601
2602 for (tag = 0; tag < snic->max_tag_id; tag++) {
2603 io_lock = snic_io_lock_tag(snic, tag);
2604
2605 spin_lock_irqsave(io_lock, flags);
2606 sc = scsi_host_find_tag(snic->shost, tag);
2607 if (!sc) {
2608 spin_unlock_irqrestore(io_lock, flags);
2609
2610 continue;
2611 }
2612
2613 sc_tgt = starget_to_tgt(scsi_target(sc->device));
2614 if (sc_tgt != tgt) {
2615 spin_unlock_irqrestore(io_lock, flags);
2616
2617 continue;
2618 }
2619 spin_unlock_irqrestore(io_lock, flags);
2620
2621 ret = snic_internal_abort_io(snic, sc, tmf);
2622 if (ret < 0) {
2623 SNIC_HOST_ERR(snic->shost,
2624 "tgt_abt_io: Tag %x, Failed w err = %d\n",
2625 tag, ret);
2626
2627 continue;
2628 }
2629
2630 if (ret == SUCCESS)
2631 abt_cnt++;
2632 }
2633
2634 SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: abt_cnt = %d\n", abt_cnt);
2635
2636 return 0;
2637 } /* end of snic_tgt_scsi_abort_io */
Kernel DRM miscellaneous fixes and cross-tree changes