?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / scsi / snic / snic_scsi.c
blob2c7b4c321cbe4a55b9cc35288eb4179cbe731ac2
1 /*
2 * Copyright 2014 Cisco Systems, Inc. All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 */
17
18 #include <linux/mempool.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/workqueue.h>
22 #include <linux/pci.h>
23 #include <linux/spinlock.h>
24 #include <linux/delay.h>
25 #include <linux/gfp.h>
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi_device.h>
29 #include <scsi/scsi_cmnd.h>
30 #include <scsi/scsi_tcq.h>
31 #include <scsi/scsi_dbg.h>
32
33 #include "snic_io.h"
34 #include "snic.h"
35
36 #define snic_cmd_tag(sc) (((struct scsi_cmnd *) sc)->request->tag)
37
38 const char *snic_state_str[] = {
39 [SNIC_INIT] = "SNIC_INIT",
40 [SNIC_ERROR] = "SNIC_ERROR",
41 [SNIC_ONLINE] = "SNIC_ONLINE",
42 [SNIC_OFFLINE] = "SNIC_OFFLINE",
43 [SNIC_FWRESET] = "SNIC_FWRESET",
44 };
45
46 static const char * const snic_req_state_str[] = {
47 [SNIC_IOREQ_NOT_INITED] = "SNIC_IOREQ_NOT_INITED",
48 [SNIC_IOREQ_PENDING] = "SNIC_IOREQ_PENDING",
49 [SNIC_IOREQ_ABTS_PENDING] = "SNIC_IOREQ_ABTS_PENDING",
50 [SNIC_IOREQ_ABTS_COMPLETE] = "SNIC_IOREQ_ABTS_COMPELTE",
51 [SNIC_IOREQ_LR_PENDING] = "SNIC_IOREQ_LR_PENDING",
52 [SNIC_IOREQ_LR_COMPLETE] = "SNIC_IOREQ_LR_COMPELTE",
53 [SNIC_IOREQ_COMPLETE] = "SNIC_IOREQ_CMD_COMPELTE",
54 };
55
56 /* snic cmd status strings */
57 static const char * const snic_io_status_str[] = {
58 [SNIC_STAT_IO_SUCCESS] = "SNIC_STAT_IO_SUCCESS", /* 0x0 */
59 [SNIC_STAT_INVALID_HDR] = "SNIC_STAT_INVALID_HDR",
60 [SNIC_STAT_OUT_OF_RES] = "SNIC_STAT_OUT_OF_RES",
61 [SNIC_STAT_INVALID_PARM] = "SNIC_STAT_INVALID_PARM",
62 [SNIC_STAT_REQ_NOT_SUP] = "SNIC_STAT_REQ_NOT_SUP",
63 [SNIC_STAT_IO_NOT_FOUND] = "SNIC_STAT_IO_NOT_FOUND",
64 [SNIC_STAT_ABORTED] = "SNIC_STAT_ABORTED",
65 [SNIC_STAT_TIMEOUT] = "SNIC_STAT_TIMEOUT",
66 [SNIC_STAT_SGL_INVALID] = "SNIC_STAT_SGL_INVALID",
67 [SNIC_STAT_DATA_CNT_MISMATCH] = "SNIC_STAT_DATA_CNT_MISMATCH",
68 [SNIC_STAT_FW_ERR] = "SNIC_STAT_FW_ERR",
69 [SNIC_STAT_ITMF_REJECT] = "SNIC_STAT_ITMF_REJECT",
70 [SNIC_STAT_ITMF_FAIL] = "SNIC_STAT_ITMF_FAIL",
71 [SNIC_STAT_ITMF_INCORRECT_LUN] = "SNIC_STAT_ITMF_INCORRECT_LUN",
72 [SNIC_STAT_CMND_REJECT] = "SNIC_STAT_CMND_REJECT",
73 [SNIC_STAT_DEV_OFFLINE] = "SNIC_STAT_DEV_OFFLINE",
74 [SNIC_STAT_NO_BOOTLUN] = "SNIC_STAT_NO_BOOTLUN",
75 [SNIC_STAT_SCSI_ERR] = "SNIC_STAT_SCSI_ERR",
76 [SNIC_STAT_NOT_READY] = "SNIC_STAT_NOT_READY",
77 [SNIC_STAT_FATAL_ERROR] = "SNIC_STAT_FATAL_ERROR",
78 };
79
80 static void snic_scsi_cleanup(struct snic *, int);
81
82 const char *
83 snic_state_to_str(unsigned int state)
84 {
85 if (state >= ARRAY_SIZE(snic_state_str) || !snic_state_str[state])
86 return "Unknown";
87
88 return snic_state_str[state];
89 }
90
91 static const char *
92 snic_io_status_to_str(unsigned int state)
93 {
94 if ((state >= ARRAY_SIZE(snic_io_status_str)) ||
95 (!snic_io_status_str[state]))
96 return "Unknown";
97
98 return snic_io_status_str[state];
99 }
100
101 static const char *
102 snic_ioreq_state_to_str(unsigned int state)
103 {
104 if (state >= ARRAY_SIZE(snic_req_state_str) ||
105 !snic_req_state_str[state])
106 return "Unknown";
107
108 return snic_req_state_str[state];
109 }
110
111 static inline spinlock_t *
112 snic_io_lock_hash(struct snic *snic, struct scsi_cmnd *sc)
113 {
114 u32 hash = snic_cmd_tag(sc) & (SNIC_IO_LOCKS - 1);
115
116 return &snic->io_req_lock[hash];
117 }
118
119 static inline spinlock_t *
120 snic_io_lock_tag(struct snic *snic, int tag)
121 {
122 return &snic->io_req_lock[tag & (SNIC_IO_LOCKS - 1)];
123 }
124
125 /* snic_release_req_buf : Releases snic_req_info */
126 static void
127 snic_release_req_buf(struct snic *snic,
128 struct snic_req_info *rqi,
129 struct scsi_cmnd *sc)
130 {
131 struct snic_host_req *req = rqi_to_req(rqi);
132
133 /* Freeing cmd without marking completion, not okay */
134 SNIC_BUG_ON(!((CMD_STATE(sc) == SNIC_IOREQ_COMPLETE) ||
135 (CMD_STATE(sc) == SNIC_IOREQ_ABTS_COMPLETE) ||
136 (CMD_FLAGS(sc) & SNIC_DEV_RST_NOTSUP) ||
137 (CMD_FLAGS(sc) & SNIC_IO_INTERNAL_TERM_ISSUED) ||
138 (CMD_FLAGS(sc) & SNIC_DEV_RST_TERM_ISSUED) ||
139 (CMD_FLAGS(sc) & SNIC_SCSI_CLEANUP) ||
140 (CMD_STATE(sc) == SNIC_IOREQ_LR_COMPLETE)));
141
142 SNIC_SCSI_DBG(snic->shost,
143 "Rel_req:sc %p:tag %x:rqi %p:ioreq %p:abt %p:dr %p: state %s:flags 0x%llx\n",
144 sc, snic_cmd_tag(sc), rqi, rqi->req, rqi->abort_req,
145 rqi->dr_req, snic_ioreq_state_to_str(CMD_STATE(sc)),
146 CMD_FLAGS(sc));
147
148 if (req->u.icmnd.sense_addr)
149 pci_unmap_single(snic->pdev,
150 le64_to_cpu(req->u.icmnd.sense_addr),
151 SCSI_SENSE_BUFFERSIZE,
152 PCI_DMA_FROMDEVICE);
153
154 scsi_dma_unmap(sc);
155
156 snic_req_free(snic, rqi);
157 } /* end of snic_release_req_buf */
158
159 /*
160 * snic_queue_icmnd_req : Queues snic_icmnd request
161 */
162 static int
163 snic_queue_icmnd_req(struct snic *snic,
164 struct snic_req_info *rqi,
165 struct scsi_cmnd *sc,
166 int sg_cnt)
167 {
168 struct scatterlist *sg;
169 struct snic_sg_desc *sgd;
170 dma_addr_t pa = 0;
171 struct scsi_lun lun;
172 u16 flags = 0;
173 int ret = 0;
174 unsigned int i;
175
176 if (sg_cnt) {
177 flags = SNIC_ICMND_ESGL;
178 sgd = (struct snic_sg_desc *) req_to_sgl(rqi->req);
179
180 for_each_sg(scsi_sglist(sc), sg, sg_cnt, i) {
181 sgd->addr = cpu_to_le64(sg_dma_address(sg));
182 sgd->len = cpu_to_le32(sg_dma_len(sg));
183 sgd->_resvd = 0;
184 sgd++;
185 }
186 }
187
188 pa = pci_map_single(snic->pdev,
189 sc->sense_buffer,
190 SCSI_SENSE_BUFFERSIZE,
191 PCI_DMA_FROMDEVICE);
192
193 if (pci_dma_mapping_error(snic->pdev, pa)) {
194 SNIC_HOST_ERR(snic->shost,
195 "QIcmnd:PCI Map Failed for sns buf %p tag %x\n",
196 sc->sense_buffer, snic_cmd_tag(sc));
197 ret = -ENOMEM;
198
199 return ret;
200 }
201
202 int_to_scsilun(sc->device->lun, &lun);
203 if (sc->sc_data_direction == DMA_FROM_DEVICE)
204 flags |= SNIC_ICMND_RD;
205 if (sc->sc_data_direction == DMA_TO_DEVICE)
206 flags |= SNIC_ICMND_WR;
207
208 /* Initialize icmnd */
209 snic_icmnd_init(rqi->req,
210 snic_cmd_tag(sc),
211 snic->config.hid, /* hid */
212 (ulong) rqi,
213 flags, /* command flags */
214 rqi->tgt_id,
215 lun.scsi_lun,
216 sc->cmnd,
217 sc->cmd_len,
218 scsi_bufflen(sc),
219 sg_cnt,
220 (ulong) req_to_sgl(rqi->req),
221 pa, /* sense buffer pa */
222 SCSI_SENSE_BUFFERSIZE);
223
224 ret = snic_queue_wq_desc(snic, rqi->req, rqi->req_len);
225 if (ret)
226 SNIC_HOST_ERR(snic->shost,
227 "QIcmnd: Queuing Icmnd Failed. ret = %d\n",
228 ret);
229
230 return ret;
231 } /* end of snic_queue_icmnd_req */
232
233 /*
234 * snic_issue_scsi_req : Prepares IO request and Issues to FW.
235 */
236 static int
237 snic_issue_scsi_req(struct snic *snic,
238 struct snic_tgt *tgt,
239 struct scsi_cmnd *sc)
240 {
241 struct snic_req_info *rqi = NULL;
242 int sg_cnt = 0;
243 int ret = 0;
244 u32 tag = snic_cmd_tag(sc);
245 u64 cmd_trc = 0, cmd_st_flags = 0;
246 spinlock_t *io_lock = NULL;
247 unsigned long flags;
248
249 CMD_STATE(sc) = SNIC_IOREQ_NOT_INITED;
250 CMD_FLAGS(sc) = SNIC_NO_FLAGS;
251 sg_cnt = scsi_dma_map(sc);
252 if (sg_cnt < 0) {
253 SNIC_TRC((u16)snic->shost->host_no, tag, (ulong) sc, 0,
254 sc->cmnd[0], sg_cnt, CMD_STATE(sc));
255
256 SNIC_HOST_ERR(snic->shost, "issue_sc:Failed to map SG List.\n");
257 ret = -ENOMEM;
258
259 goto issue_sc_end;
260 }
261
262 rqi = snic_req_init(snic, sg_cnt);
263 if (!rqi) {
264 scsi_dma_unmap(sc);
265 ret = -ENOMEM;
266
267 goto issue_sc_end;
268 }
269
270 rqi->tgt_id = tgt->id;
271 rqi->sc = sc;
272
273 CMD_STATE(sc) = SNIC_IOREQ_PENDING;
274 CMD_SP(sc) = (char *) rqi;
275 cmd_trc = SNIC_TRC_CMD(sc);
276 CMD_FLAGS(sc) |= (SNIC_IO_INITIALIZED | SNIC_IO_ISSUED);
277 cmd_st_flags = SNIC_TRC_CMD_STATE_FLAGS(sc);
278 io_lock = snic_io_lock_hash(snic, sc);
279
280 /* create wq desc and enqueue it */
281 ret = snic_queue_icmnd_req(snic, rqi, sc, sg_cnt);
282 if (ret) {
283 SNIC_HOST_ERR(snic->shost,
284 "issue_sc: icmnd qing Failed for sc %p, err %d\n",
285 sc, ret);
286
287 spin_lock_irqsave(io_lock, flags);
288 rqi = (struct snic_req_info *) CMD_SP(sc);
289 CMD_SP(sc) = NULL;
290 CMD_STATE(sc) = SNIC_IOREQ_COMPLETE;
291 CMD_FLAGS(sc) &= ~SNIC_IO_ISSUED; /* turn off the flag */
292 spin_unlock_irqrestore(io_lock, flags);
293
294 if (rqi)
295 snic_release_req_buf(snic, rqi, sc);
296
297 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, 0, 0, 0,
298 SNIC_TRC_CMD_STATE_FLAGS(sc));
299 } else {
300 u32 io_sz = scsi_bufflen(sc) >> 9;
301 u32 qtime = jiffies - rqi->start_time;
302 struct snic_io_stats *iostats = &snic->s_stats.io;
303
304 if (io_sz > atomic64_read(&iostats->max_io_sz))
305 atomic64_set(&iostats->max_io_sz, io_sz);
306
307 if (qtime > atomic64_read(&iostats->max_qtime))
308 atomic64_set(&iostats->max_qtime, qtime);
309
310 SNIC_SCSI_DBG(snic->shost,
311 "issue_sc:sc %p, tag %d queued to WQ.\n",
312 sc, tag);
313
314 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, (ulong) rqi,
315 sg_cnt, cmd_trc, cmd_st_flags);
316 }
317
318 issue_sc_end:
319
320 return ret;
321 } /* end of snic_issue_scsi_req */
322
323
324 /*
325 * snic_queuecommand
326 * Routine to send a scsi cdb to LLD
327 * Called with host_lock held and interrupts disabled
328 */
329 int
330 snic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc)
331 {
332 struct snic_tgt *tgt = NULL;
333 struct snic *snic = shost_priv(shost);
334 int ret;
335
336 tgt = starget_to_tgt(scsi_target(sc->device));
337 ret = snic_tgt_chkready(tgt);
338 if (ret) {
339 SNIC_HOST_ERR(shost, "Tgt %p id %d Not Ready.\n", tgt, tgt->id);
340 atomic64_inc(&snic->s_stats.misc.tgt_not_rdy);
341 sc->result = ret;
342 sc->scsi_done(sc);
343
344 return 0;
345 }
346
347 if (snic_get_state(snic) != SNIC_ONLINE) {
348 SNIC_HOST_ERR(shost, "snic state is %s\n",
349 snic_state_str[snic_get_state(snic)]);
350
351 return SCSI_MLQUEUE_HOST_BUSY;
352 }
353 atomic_inc(&snic->ios_inflight);
354
355 SNIC_SCSI_DBG(shost, "sc %p Tag %d (sc %0x) lun %lld in snic_qcmd\n",
356 sc, snic_cmd_tag(sc), sc->cmnd[0], sc->device->lun);
357
358 memset(scsi_cmd_priv(sc), 0, sizeof(struct snic_internal_io_state));
359
360 ret = snic_issue_scsi_req(snic, tgt, sc);
361 if (ret) {
362 SNIC_HOST_ERR(shost, "Failed to Q, Scsi Req w/ err %d.\n", ret);
363 ret = SCSI_MLQUEUE_HOST_BUSY;
364 } else
365 snic_stats_update_active_ios(&snic->s_stats);
366
367 atomic_dec(&snic->ios_inflight);
368
369 return ret;
370 } /* end of snic_queuecommand */
371
372 /*
373 * snic_process_abts_pending_state:
374 * caller should hold IO lock
375 */
376 static void
377 snic_proc_tmreq_pending_state(struct snic *snic,
378 struct scsi_cmnd *sc,
379 u8 cmpl_status)
380 {
381 int state = CMD_STATE(sc);
382
383 if (state == SNIC_IOREQ_ABTS_PENDING)
384 CMD_FLAGS(sc) |= SNIC_IO_ABTS_PENDING;
385 else if (state == SNIC_IOREQ_LR_PENDING)
386 CMD_FLAGS(sc) |= SNIC_DEV_RST_PENDING;
387 else
388 SNIC_BUG_ON(1);
389
390 switch (cmpl_status) {
391 case SNIC_STAT_IO_SUCCESS:
392 CMD_FLAGS(sc) |= SNIC_IO_DONE;
393 break;
394
395 case SNIC_STAT_ABORTED:
396 CMD_FLAGS(sc) |= SNIC_IO_ABORTED;
397 break;
398
399 default:
400 SNIC_BUG_ON(1);
401 }
402 }
403
404 /*
405 * snic_process_io_failed_state:
406 * Processes IO's error states
407 */
408 static void
409 snic_process_io_failed_state(struct snic *snic,
410 struct snic_icmnd_cmpl *icmnd_cmpl,
411 struct scsi_cmnd *sc,
412 u8 cmpl_stat)
413 {
414 int res = 0;
415
416 switch (cmpl_stat) {
417 case SNIC_STAT_TIMEOUT: /* Req was timedout */
418 atomic64_inc(&snic->s_stats.misc.io_tmo);
419 res = DID_TIME_OUT;
420 break;
421
422 case SNIC_STAT_ABORTED: /* Req was aborted */
423 atomic64_inc(&snic->s_stats.misc.io_aborted);
424 res = DID_ABORT;
425 break;
426
427 case SNIC_STAT_DATA_CNT_MISMATCH:/* Recv/Sent more/less data than exp */
428 atomic64_inc(&snic->s_stats.misc.data_cnt_mismat);
429 scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid));
430 res = DID_ERROR;
431 break;
432
433 case SNIC_STAT_OUT_OF_RES: /* Out of resources to complete request */
434 atomic64_inc(&snic->s_stats.fw.out_of_res);
435 res = DID_REQUEUE;
436 break;
437
438 case SNIC_STAT_IO_NOT_FOUND: /* Requested I/O was not found */
439 atomic64_inc(&snic->s_stats.io.io_not_found);
440 res = DID_ERROR;
441 break;
442
443 case SNIC_STAT_SGL_INVALID: /* Req was aborted to due to sgl error*/
444 atomic64_inc(&snic->s_stats.misc.sgl_inval);
445 res = DID_ERROR;
446 break;
447
448 case SNIC_STAT_FW_ERR: /* Req terminated due to FW Error */
449 atomic64_inc(&snic->s_stats.fw.io_errs);
450 res = DID_ERROR;
451 break;
452
453 case SNIC_STAT_SCSI_ERR: /* FW hits SCSI Error */
454 atomic64_inc(&snic->s_stats.fw.scsi_errs);
455 break;
456
457 case SNIC_STAT_NOT_READY: /* XPT yet to initialize */
458 case SNIC_STAT_DEV_OFFLINE: /* Device offline */
459 res = DID_NO_CONNECT;
460 break;
461
462 case SNIC_STAT_INVALID_HDR: /* Hdr contains invalid data */
463 case SNIC_STAT_INVALID_PARM: /* Some param in req is invalid */
464 case SNIC_STAT_REQ_NOT_SUP: /* Req type is not supported */
465 case SNIC_STAT_CMND_REJECT: /* Req rejected */
466 case SNIC_STAT_FATAL_ERROR: /* XPT Error */
467 default:
468 SNIC_SCSI_DBG(snic->shost,
469 "Invalid Hdr/Param or Req Not Supported or Cmnd Rejected or Device Offline. or Unknown\n");
470 res = DID_ERROR;
471 break;
472 }
473
474 SNIC_HOST_ERR(snic->shost, "fw returns failed status %s flags 0x%llx\n",
475 snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc));
476
477 /* Set sc->result */
478 sc->result = (res << 16) | icmnd_cmpl->scsi_status;
479 } /* end of snic_process_io_failed_state */
480
481 /*
482 * snic_tmreq_pending : is task management in progress.
483 */
484 static int
485 snic_tmreq_pending(struct scsi_cmnd *sc)
486 {
487 int state = CMD_STATE(sc);
488
489 return ((state == SNIC_IOREQ_ABTS_PENDING) ||
490 (state == SNIC_IOREQ_LR_PENDING));
491 }
492
493 /*
494 * snic_process_icmnd_cmpl_status:
495 * Caller should hold io_lock
496 */
497 static int
498 snic_process_icmnd_cmpl_status(struct snic *snic,
499 struct snic_icmnd_cmpl *icmnd_cmpl,
500 u8 cmpl_stat,
501 struct scsi_cmnd *sc)
502 {
503 u8 scsi_stat = icmnd_cmpl->scsi_status;
504 u64 xfer_len = 0;
505 int ret = 0;
506
507 /* Mark the IO as complete */
508 CMD_STATE(sc) = SNIC_IOREQ_COMPLETE;
509
510 if (likely(cmpl_stat == SNIC_STAT_IO_SUCCESS)) {
511 sc->result = (DID_OK << 16) | scsi_stat;
512
513 xfer_len = scsi_bufflen(sc);
514
515 /* Update SCSI Cmd with resid value */
516 scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid));
517
518 if (icmnd_cmpl->flags & SNIC_ICMND_CMPL_UNDR_RUN) {
519 xfer_len -= le32_to_cpu(icmnd_cmpl->resid);
520 atomic64_inc(&snic->s_stats.misc.io_under_run);
521 }
522
523 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL)
524 atomic64_inc(&snic->s_stats.misc.qfull);
525
526 ret = 0;
527 } else {
528 snic_process_io_failed_state(snic, icmnd_cmpl, sc, cmpl_stat);
529 atomic64_inc(&snic->s_stats.io.fail);
530 SNIC_HOST_ERR(snic->shost,
531 "icmnd_cmpl: IO Failed : Hdr Status %s flags 0x%llx\n",
532 snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc));
533 ret = 1;
534 }
535
536 return ret;
537 } /* end of snic_process_icmnd_cmpl_status */
538
539
540 /*
541 * snic_icmnd_cmpl_handler
542 * Routine to handle icmnd completions
543 */
544 static void
545 snic_icmnd_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
546 {
547 u8 typ, hdr_stat;
548 u32 cmnd_id, hid;
549 ulong ctx;
550 struct scsi_cmnd *sc = NULL;
551 struct snic_icmnd_cmpl *icmnd_cmpl = NULL;
552 struct snic_host_req *req = NULL;
553 struct snic_req_info *rqi = NULL;
554 unsigned long flags, start_time;
555 spinlock_t *io_lock;
556 u8 sc_stat = 0;
557
558 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
559 icmnd_cmpl = &fwreq->u.icmnd_cmpl;
560 sc_stat = icmnd_cmpl->scsi_status;
561
562 SNIC_SCSI_DBG(snic->shost,
563 "Icmnd_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,i ctx = %lx\n",
564 typ, hdr_stat, cmnd_id, hid, ctx);
565
566 if (cmnd_id >= snic->max_tag_id) {
567 SNIC_HOST_ERR(snic->shost,
568 "Icmnd_cmpl:Tag Error:Out of Range Tag %d, hdr status = %s\n",
569 cmnd_id, snic_io_status_to_str(hdr_stat));
570 return;
571 }
572
573 sc = scsi_host_find_tag(snic->shost, cmnd_id);
574 WARN_ON_ONCE(!sc);
575
576 if (!sc) {
577 atomic64_inc(&snic->s_stats.io.sc_null);
578 SNIC_HOST_ERR(snic->shost,
579 "Icmnd_cmpl: Scsi Cmnd Not found, sc = NULL Hdr Status = %s tag = 0x%x fwreq = 0x%p\n",
580 snic_io_status_to_str(hdr_stat),
581 cmnd_id,
582 fwreq);
583
584 SNIC_TRC(snic->shost->host_no, cmnd_id, 0,
585 ((u64)hdr_stat << 16 |
586 (u64)sc_stat << 8 | (u64)icmnd_cmpl->flags),
587 (ulong) fwreq, le32_to_cpu(icmnd_cmpl->resid), ctx);
588
589 return;
590 }
591
592 io_lock = snic_io_lock_hash(snic, sc);
593
594 spin_lock_irqsave(io_lock, flags);
595 rqi = (struct snic_req_info *) CMD_SP(sc);
596 SNIC_SCSI_DBG(snic->shost,
597 "Icmnd_cmpl:lun %lld sc %p cmd %xtag %d flags 0x%llx rqi %p\n",
598 sc->device->lun, sc, sc->cmnd[0], snic_cmd_tag(sc),
599 CMD_FLAGS(sc), rqi);
600
601 SNIC_BUG_ON(rqi != (struct snic_req_info *)ctx);
602 WARN_ON_ONCE(req);
603 if (!rqi) {
604 atomic64_inc(&snic->s_stats.io.req_null);
605 CMD_FLAGS(sc) |= SNIC_IO_REQ_NULL;
606 spin_unlock_irqrestore(io_lock, flags);
607
608 SNIC_HOST_ERR(snic->shost,
609 "Icmnd_cmpl:Host Req Not Found(null), Hdr Status %s, Tag 0x%x, sc 0x%p flags 0x%llx\n",
610 snic_io_status_to_str(hdr_stat),
611 cmnd_id, sc, CMD_FLAGS(sc));
612 return;
613 }
614
615 rqi = (struct snic_req_info *) ctx;
616 start_time = rqi->start_time;
617
618 /* firmware completed the io */
619 rqi->io_cmpl = 1;
620
621 /*
622 * if SCSI-ML has already issued abort on this command,
623 * ignore completion of the IO. The abts path will clean it up
624 */
625 if (unlikely(snic_tmreq_pending(sc))) {
626 snic_proc_tmreq_pending_state(snic, sc, hdr_stat);
627 spin_unlock_irqrestore(io_lock, flags);
628
629 snic_stats_update_io_cmpl(&snic->s_stats);
630
631 /* Expected value is SNIC_STAT_ABORTED */
632 if (likely(hdr_stat == SNIC_STAT_ABORTED))
633 return;
634
635 SNIC_SCSI_DBG(snic->shost,
636 "icmnd_cmpl:TM Req Pending(%s), Hdr Status %s sc 0x%p scsi status %x resid %d flags 0x%llx\n",
637 snic_ioreq_state_to_str(CMD_STATE(sc)),
638 snic_io_status_to_str(hdr_stat),
639 sc, sc_stat, le32_to_cpu(icmnd_cmpl->resid),
640 CMD_FLAGS(sc));
641
642 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
643 jiffies_to_msecs(jiffies - start_time), (ulong) fwreq,
644 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
645
646 return;
647 }
648
649 if (snic_process_icmnd_cmpl_status(snic, icmnd_cmpl, hdr_stat, sc)) {
650 scsi_print_command(sc);
651 SNIC_HOST_ERR(snic->shost,
652 "icmnd_cmpl:IO Failed, sc 0x%p Tag %d Cmd %x Hdr Status %s flags 0x%llx\n",
653 sc, sc->cmnd[0], cmnd_id,
654 snic_io_status_to_str(hdr_stat), CMD_FLAGS(sc));
655 }
656
657 /* Break link with the SCSI Command */
658 CMD_SP(sc) = NULL;
659 CMD_FLAGS(sc) |= SNIC_IO_DONE;
660
661 spin_unlock_irqrestore(io_lock, flags);
662
663 /* For now, consider only successful IO. */
664 snic_calc_io_process_time(snic, rqi);
665
666 snic_release_req_buf(snic, rqi, sc);
667
668 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
669 jiffies_to_msecs(jiffies - start_time), (ulong) fwreq,
670 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
671
672
673 if (sc->scsi_done)
674 sc->scsi_done(sc);
675
676 snic_stats_update_io_cmpl(&snic->s_stats);
677 } /* end of snic_icmnd_cmpl_handler */
678
679 static void
680 snic_proc_dr_cmpl_locked(struct snic *snic,
681 struct snic_fw_req *fwreq,
682 u8 cmpl_stat,
683 u32 cmnd_id,
684 struct scsi_cmnd *sc)
685 {
686 struct snic_req_info *rqi = (struct snic_req_info *) CMD_SP(sc);
687 u32 start_time = rqi->start_time;
688
689 CMD_LR_STATUS(sc) = cmpl_stat;
690
691 SNIC_SCSI_DBG(snic->shost, "itmf_cmpl: Cmd State = %s\n",
692 snic_ioreq_state_to_str(CMD_STATE(sc)));
693
694 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
695 CMD_FLAGS(sc) |= SNIC_DEV_RST_ABTS_PENDING;
696
697 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
698 jiffies_to_msecs(jiffies - start_time),
699 (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc));
700
701 SNIC_SCSI_DBG(snic->shost,
702 "itmf_cmpl: Terminate Pending Dev Reset Cmpl Recvd.id %x, status %s flags 0x%llx\n",
703 (int)(cmnd_id & SNIC_TAG_MASK),
704 snic_io_status_to_str(cmpl_stat),
705 CMD_FLAGS(sc));
706
707 return;
708 }
709
710
711 if (CMD_FLAGS(sc) & SNIC_DEV_RST_TIMEDOUT) {
712 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
713 jiffies_to_msecs(jiffies - start_time),
714 (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc));
715
716 SNIC_SCSI_DBG(snic->shost,
717 "itmf_cmpl:Dev Reset Completion Received after timeout. id %d cmpl status %s flags 0x%llx\n",
718 (int)(cmnd_id & SNIC_TAG_MASK),
719 snic_io_status_to_str(cmpl_stat),
720 CMD_FLAGS(sc));
721
722 return;
723 }
724
725 CMD_STATE(sc) = SNIC_IOREQ_LR_COMPLETE;
726 CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE;
727
728 SNIC_SCSI_DBG(snic->shost,
729 "itmf_cmpl:Dev Reset Cmpl Recvd id %d cmpl status %s flags 0x%llx\n",
730 (int)(cmnd_id & SNIC_TAG_MASK),
731 snic_io_status_to_str(cmpl_stat),
732 CMD_FLAGS(sc));
733
734 if (rqi->dr_done)
735 complete(rqi->dr_done);
736 } /* end of snic_proc_dr_cmpl_locked */
737
738 /*
739 * snic_update_abort_stats : Updates abort stats based on completion status.
740 */
741 static void
742 snic_update_abort_stats(struct snic *snic, u8 cmpl_stat)
743 {
744 struct snic_abort_stats *abt_stats = &snic->s_stats.abts;
745
746 SNIC_SCSI_DBG(snic->shost, "Updating Abort stats.\n");
747
748 switch (cmpl_stat) {
749 case SNIC_STAT_IO_SUCCESS:
750 break;
751
752 case SNIC_STAT_TIMEOUT:
753 atomic64_inc(&abt_stats->fw_tmo);
754 break;
755
756 case SNIC_STAT_IO_NOT_FOUND:
757 atomic64_inc(&abt_stats->io_not_found);
758 break;
759
760 default:
761 atomic64_inc(&abt_stats->fail);
762 break;
763 }
764 }
765
766 static int
767 snic_process_itmf_cmpl(struct snic *snic,
768 struct snic_fw_req *fwreq,
769 u32 cmnd_id,
770 u8 cmpl_stat,
771 struct scsi_cmnd *sc)
772 {
773 struct snic_req_info *rqi = NULL;
774 u32 tm_tags = 0;
775 spinlock_t *io_lock = NULL;
776 unsigned long flags;
777 u32 start_time = 0;
778 int ret = 0;
779
780 io_lock = snic_io_lock_hash(snic, sc);
781 spin_lock_irqsave(io_lock, flags);
782 rqi = (struct snic_req_info *) CMD_SP(sc);
783 WARN_ON_ONCE(!rqi);
784
785 if (!rqi) {
786 atomic64_inc(&snic->s_stats.io.req_null);
787 spin_unlock_irqrestore(io_lock, flags);
788 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
789 SNIC_HOST_ERR(snic->shost,
790 "itmf_cmpl: rqi is null,Hdr stat = %s Tag = 0x%x sc = 0x%p flags 0x%llx\n",
791 snic_io_status_to_str(cmpl_stat), cmnd_id, sc,
792 CMD_FLAGS(sc));
793
794 return ret;
795 }
796
797 /* Extract task management flags */
798 tm_tags = cmnd_id & ~(SNIC_TAG_MASK);
799
800 start_time = rqi->start_time;
801 cmnd_id &= (SNIC_TAG_MASK);
802
803 switch (tm_tags) {
804 case SNIC_TAG_ABORT:
805 /* Abort only issued on cmd */
806 snic_update_abort_stats(snic, cmpl_stat);
807
808 if (CMD_STATE(sc) != SNIC_IOREQ_ABTS_PENDING) {
809 /* This is a late completion. Ignore it. */
810 ret = -1;
811 spin_unlock_irqrestore(io_lock, flags);
812 break;
813 }
814
815 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
816 CMD_ABTS_STATUS(sc) = cmpl_stat;
817 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE;
818
819 SNIC_SCSI_DBG(snic->shost,
820 "itmf_cmpl:Abort Cmpl Recvd.Tag 0x%x Status %s flags 0x%llx\n",
821 cmnd_id,
822 snic_io_status_to_str(cmpl_stat),
823 CMD_FLAGS(sc));
824
825 /*
826 * If scsi_eh thread is blocked waiting for abts complete,
827 * signal completion to it. IO will be cleaned in the thread,
828 * else clean it in this context.
829 */
830 if (rqi->abts_done) {
831 complete(rqi->abts_done);
832 spin_unlock_irqrestore(io_lock, flags);
833
834 break; /* jump out */
835 }
836
837 CMD_SP(sc) = NULL;
838 sc->result = (DID_ERROR << 16);
839 SNIC_SCSI_DBG(snic->shost,
840 "itmf_cmpl: Completing IO. sc %p flags 0x%llx\n",
841 sc, CMD_FLAGS(sc));
842
843 spin_unlock_irqrestore(io_lock, flags);
844
845 snic_release_req_buf(snic, rqi, sc);
846
847 if (sc->scsi_done) {
848 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc,
849 jiffies_to_msecs(jiffies - start_time),
850 (ulong) fwreq, SNIC_TRC_CMD(sc),
851 SNIC_TRC_CMD_STATE_FLAGS(sc));
852
853 sc->scsi_done(sc);
854 }
855
856 break;
857
858 case SNIC_TAG_DEV_RST:
859 case SNIC_TAG_DEV_RST | SNIC_TAG_IOCTL_DEV_RST:
860 snic_proc_dr_cmpl_locked(snic, fwreq, cmpl_stat, cmnd_id, sc);
861 spin_unlock_irqrestore(io_lock, flags);
862 ret = 0;
863
864 break;
865
866 case SNIC_TAG_ABORT | SNIC_TAG_DEV_RST:
867 /* Abort and terminate completion of device reset req */
868
869 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
870 CMD_ABTS_STATUS(sc) = cmpl_stat;
871 CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE;
872
873 SNIC_SCSI_DBG(snic->shost,
874 "itmf_cmpl:dev reset abts cmpl recvd. id %d status %s flags 0x%llx\n",
875 cmnd_id, snic_io_status_to_str(cmpl_stat),
876 CMD_FLAGS(sc));
877
878 if (rqi->abts_done)
879 complete(rqi->abts_done);
880
881 spin_unlock_irqrestore(io_lock, flags);
882
883 break;
884
885 default:
886 spin_unlock_irqrestore(io_lock, flags);
887 SNIC_HOST_ERR(snic->shost,
888 "itmf_cmpl: Unknown TM tag bit 0x%x\n", tm_tags);
889
890 SNIC_HOST_ERR(snic->shost,
891 "itmf_cmpl:Unexpected itmf io stat %s Tag = 0x%x flags 0x%llx\n",
892 snic_ioreq_state_to_str(CMD_STATE(sc)),
893 cmnd_id,
894 CMD_FLAGS(sc));
895 ret = -1;
896 SNIC_BUG_ON(1);
897
898 break;
899 }
900
901 return ret;
902 } /* end of snic_process_itmf_cmpl_status */
903
904 /*
905 * snic_itmf_cmpl_handler.
906 * Routine to handle itmf completions.
907 */
908 static void
909 snic_itmf_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
910 {
911 struct scsi_cmnd *sc = NULL;
912 struct snic_req_info *rqi = NULL;
913 struct snic_itmf_cmpl *itmf_cmpl = NULL;
914 ulong ctx;
915 u32 cmnd_id;
916 u32 hid;
917 u8 typ;
918 u8 hdr_stat;
919
920 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
921 SNIC_SCSI_DBG(snic->shost,
922 "Itmf_cmpl: %s: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,ctx = %lx\n",
923 __func__, typ, hdr_stat, cmnd_id, hid, ctx);
924
925 itmf_cmpl = &fwreq->u.itmf_cmpl;
926 SNIC_SCSI_DBG(snic->shost,
927 "Itmf_cmpl: nterm %u , flags 0x%x\n",
928 le32_to_cpu(itmf_cmpl->nterminated), itmf_cmpl->flags);
929
930 /* spl case, dev reset issued through ioctl */
931 if (cmnd_id & SNIC_TAG_IOCTL_DEV_RST) {
932 rqi = (struct snic_req_info *) ctx;
933 sc = rqi->sc;
934
935 goto ioctl_dev_rst;
936 }
937
938 if ((cmnd_id & SNIC_TAG_MASK) >= snic->max_tag_id) {
939 SNIC_HOST_ERR(snic->shost,
940 "Itmf_cmpl: Tag 0x%x out of Range,HdrStat %s\n",
941 cmnd_id, snic_io_status_to_str(hdr_stat));
942 SNIC_BUG_ON(1);
943
944 return;
945 }
946
947 sc = scsi_host_find_tag(snic->shost, cmnd_id & SNIC_TAG_MASK);
948 WARN_ON_ONCE(!sc);
949
950 ioctl_dev_rst:
951 if (!sc) {
952 atomic64_inc(&snic->s_stats.io.sc_null);
953 SNIC_HOST_ERR(snic->shost,
954 "Itmf_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n",
955 snic_io_status_to_str(hdr_stat), cmnd_id);
956
957 return;
958 }
959
960 snic_process_itmf_cmpl(snic, fwreq, cmnd_id, hdr_stat, sc);
961 } /* end of snic_itmf_cmpl_handler */
962
963
964
965 static void
966 snic_hba_reset_scsi_cleanup(struct snic *snic, struct scsi_cmnd *sc)
967 {
968 struct snic_stats *st = &snic->s_stats;
969 long act_ios = 0, act_fwreqs = 0;
970
971 SNIC_SCSI_DBG(snic->shost, "HBA Reset scsi cleanup.\n");
972 snic_scsi_cleanup(snic, snic_cmd_tag(sc));
973
974 /* Update stats on pending IOs */
975 act_ios = atomic64_read(&st->io.active);
976 atomic64_add(act_ios, &st->io.compl);
977 atomic64_sub(act_ios, &st->io.active);
978
979 act_fwreqs = atomic64_read(&st->fw.actv_reqs);
980 atomic64_sub(act_fwreqs, &st->fw.actv_reqs);
981 }
982
983 /*
984 * snic_hba_reset_cmpl_handler :
985 *
986 * Notes :
987 * 1. Cleanup all the scsi cmds, release all snic specific cmds
988 * 2. Issue Report Targets in case of SAN targets
989 */
990 static int
991 snic_hba_reset_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
992 {
993 ulong ctx;
994 u32 cmnd_id;
995 u32 hid;
996 u8 typ;
997 u8 hdr_stat;
998 struct scsi_cmnd *sc = NULL;
999 struct snic_req_info *rqi = NULL;
1000 spinlock_t *io_lock = NULL;
1001 unsigned long flags, gflags;
1002 int ret = 0;
1003
1004 SNIC_HOST_INFO(snic->shost,
1005 "reset_cmpl:HBA Reset Completion received.\n");
1006
1007 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
1008 SNIC_SCSI_DBG(snic->shost,
1009 "reset_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n",
1010 typ, hdr_stat, cmnd_id, hid, ctx);
1011
1012 /* spl case, host reset issued through ioctl */
1013 if (cmnd_id == SCSI_NO_TAG) {
1014 rqi = (struct snic_req_info *) ctx;
1015 sc = rqi->sc;
1016
1017 goto ioctl_hba_rst;
1018 }
1019
1020 if (cmnd_id >= snic->max_tag_id) {
1021 SNIC_HOST_ERR(snic->shost,
1022 "reset_cmpl: Tag 0x%x out of Range,HdrStat %s\n",
1023 cmnd_id, snic_io_status_to_str(hdr_stat));
1024 SNIC_BUG_ON(1);
1025
1026 return 1;
1027 }
1028
1029 sc = scsi_host_find_tag(snic->shost, cmnd_id);
1030 ioctl_hba_rst:
1031 if (!sc) {
1032 atomic64_inc(&snic->s_stats.io.sc_null);
1033 SNIC_HOST_ERR(snic->shost,
1034 "reset_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n",
1035 snic_io_status_to_str(hdr_stat), cmnd_id);
1036 ret = 1;
1037
1038 return ret;
1039 }
1040
1041 io_lock = snic_io_lock_hash(snic, sc);
1042 spin_lock_irqsave(io_lock, flags);
1043
1044 if (!snic->remove_wait) {
1045 spin_unlock_irqrestore(io_lock, flags);
1046 SNIC_HOST_ERR(snic->shost,
1047 "reset_cmpl:host reset completed after timout\n");
1048 ret = 1;
1049
1050 return ret;
1051 }
1052
1053 rqi = (struct snic_req_info *) CMD_SP(sc);
1054 WARN_ON_ONCE(!rqi);
1055
1056 if (!rqi) {
1057 atomic64_inc(&snic->s_stats.io.req_null);
1058 spin_unlock_irqrestore(io_lock, flags);
1059 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
1060 SNIC_HOST_ERR(snic->shost,
1061 "reset_cmpl: rqi is null,Hdr stat %s Tag 0x%x sc 0x%p flags 0x%llx\n",
1062 snic_io_status_to_str(hdr_stat), cmnd_id, sc,
1063 CMD_FLAGS(sc));
1064
1065 ret = 1;
1066
1067 return ret;
1068 }
1069 /* stats */
1070 spin_unlock_irqrestore(io_lock, flags);
1071
1072 /* scsi cleanup */
1073 snic_hba_reset_scsi_cleanup(snic, sc);
1074
1075 SNIC_BUG_ON(snic_get_state(snic) != SNIC_OFFLINE &&
1076 snic_get_state(snic) != SNIC_FWRESET);
1077
1078 /* Careful locking between snic_lock and io lock */
1079 spin_lock_irqsave(io_lock, flags);
1080 spin_lock_irqsave(&snic->snic_lock, gflags);
1081 if (snic_get_state(snic) == SNIC_FWRESET)
1082 snic_set_state(snic, SNIC_ONLINE);
1083 spin_unlock_irqrestore(&snic->snic_lock, gflags);
1084
1085 if (snic->remove_wait)
1086 complete(snic->remove_wait);
1087
1088 spin_unlock_irqrestore(io_lock, flags);
1089 atomic64_inc(&snic->s_stats.reset.hba_reset_cmpl);
1090
1091 ret = 0;
1092 /* Rediscovery is for SAN */
1093 if (snic->config.xpt_type == SNIC_DAS)
1094 return ret;
1095
1096 SNIC_SCSI_DBG(snic->shost, "reset_cmpl: Queuing discovery work.\n");
1097 queue_work(snic_glob->event_q, &snic->disc_work);
1098
1099 return ret;
1100 }
1101
1102 static void
1103 snic_msg_ack_handler(struct snic *snic, struct snic_fw_req *fwreq)
1104 {
1105 SNIC_HOST_INFO(snic->shost, "Message Ack Received.\n");
1106
1107 SNIC_ASSERT_NOT_IMPL(1);
1108 }
1109
1110 static void
1111 snic_aen_handler(struct snic *snic, struct snic_fw_req *fwreq)
1112 {
1113 u8 typ, hdr_stat;
1114 u32 cmnd_id, hid;
1115 ulong ctx;
1116 struct snic_async_evnotify *aen = &fwreq->u.async_ev;
1117 u32 event_id = 0;
1118
1119 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
1120 SNIC_SCSI_DBG(snic->shost,
1121 "aen: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n",
1122 typ, hdr_stat, cmnd_id, hid, ctx);
1123
1124 event_id = le32_to_cpu(aen->ev_id);
1125
1126 switch (event_id) {
1127 case SNIC_EV_TGT_OFFLINE:
1128 SNIC_HOST_INFO(snic->shost, "aen:TGT_OFFLINE Event Recvd.\n");
1129 break;
1130
1131 case SNIC_EV_TGT_ONLINE:
1132 SNIC_HOST_INFO(snic->shost, "aen:TGT_ONLINE Event Recvd.\n");
1133 break;
1134
1135 case SNIC_EV_LUN_OFFLINE:
1136 SNIC_HOST_INFO(snic->shost, "aen:LUN_OFFLINE Event Recvd.\n");
1137 break;
1138
1139 case SNIC_EV_LUN_ONLINE:
1140 SNIC_HOST_INFO(snic->shost, "aen:LUN_ONLINE Event Recvd.\n");
1141 break;
1142
1143 case SNIC_EV_CONF_CHG:
1144 SNIC_HOST_INFO(snic->shost, "aen:Config Change Event Recvd.\n");
1145 break;
1146
1147 case SNIC_EV_TGT_ADDED:
1148 SNIC_HOST_INFO(snic->shost, "aen:TGT_ADD Event Recvd.\n");
1149 break;
1150
1151 case SNIC_EV_TGT_DELTD:
1152 SNIC_HOST_INFO(snic->shost, "aen:TGT_DEL Event Recvd.\n");
1153 break;
1154
1155 case SNIC_EV_LUN_ADDED:
1156 SNIC_HOST_INFO(snic->shost, "aen:LUN_ADD Event Recvd.\n");
1157 break;
1158
1159 case SNIC_EV_LUN_DELTD:
1160 SNIC_HOST_INFO(snic->shost, "aen:LUN_DEL Event Recvd.\n");
1161 break;
1162
1163 case SNIC_EV_DISC_CMPL:
1164 SNIC_HOST_INFO(snic->shost, "aen:DISC_CMPL Event Recvd.\n");
1165 break;
1166
1167 default:
1168 SNIC_HOST_INFO(snic->shost, "aen:Unknown Event Recvd.\n");
1169 SNIC_BUG_ON(1);
1170 break;
1171 }
1172
1173 SNIC_ASSERT_NOT_IMPL(1);
1174 } /* end of snic_aen_handler */
1175
1176 /*
1177 * snic_io_cmpl_handler
1178 * Routine to process CQ entries(IO Completions) posted by fw.
1179 */
1180 static int
1181 snic_io_cmpl_handler(struct vnic_dev *vdev,
1182 unsigned int cq_idx,
1183 struct snic_fw_req *fwreq)
1184 {
1185 struct snic *snic = svnic_dev_priv(vdev);
1186 u64 start = jiffies, cmpl_time;
1187
1188 snic_print_desc(__func__, (char *)fwreq, sizeof(*fwreq));
1189
1190 /* Update FW Stats */
1191 if ((fwreq->hdr.type >= SNIC_RSP_REPORT_TGTS_CMPL) &&
1192 (fwreq->hdr.type <= SNIC_RSP_BOOT_LUNS_CMPL))
1193 atomic64_dec(&snic->s_stats.fw.actv_reqs);
1194
1195 SNIC_BUG_ON((fwreq->hdr.type > SNIC_RSP_BOOT_LUNS_CMPL) &&
1196 (fwreq->hdr.type < SNIC_MSG_ASYNC_EVNOTIFY));
1197
1198 /* Check for snic subsys errors */
1199 switch (fwreq->hdr.status) {
1200 case SNIC_STAT_NOT_READY: /* XPT yet to initialize */
1201 SNIC_HOST_ERR(snic->shost,
1202 "sNIC SubSystem is NOT Ready.\n");
1203 break;
1204
1205 case SNIC_STAT_FATAL_ERROR: /* XPT Error */
1206 SNIC_HOST_ERR(snic->shost,
1207 "sNIC SubSystem in Unrecoverable State.\n");
1208 break;
1209 }
1210
1211 switch (fwreq->hdr.type) {
1212 case SNIC_RSP_EXCH_VER_CMPL:
1213 snic_io_exch_ver_cmpl_handler(snic, fwreq);
1214 break;
1215
1216 case SNIC_RSP_REPORT_TGTS_CMPL:
1217 snic_report_tgt_cmpl_handler(snic, fwreq);
1218 break;
1219
1220 case SNIC_RSP_ICMND_CMPL:
1221 snic_icmnd_cmpl_handler(snic, fwreq);
1222 break;
1223
1224 case SNIC_RSP_ITMF_CMPL:
1225 snic_itmf_cmpl_handler(snic, fwreq);
1226 break;
1227
1228 case SNIC_RSP_HBA_RESET_CMPL:
1229 snic_hba_reset_cmpl_handler(snic, fwreq);
1230 break;
1231
1232 case SNIC_MSG_ACK:
1233 snic_msg_ack_handler(snic, fwreq);
1234 break;
1235
1236 case SNIC_MSG_ASYNC_EVNOTIFY:
1237 snic_aen_handler(snic, fwreq);
1238 break;
1239
1240 default:
1241 SNIC_BUG_ON(1);
1242 SNIC_SCSI_DBG(snic->shost,
1243 "Unknown Firmwqre completion request type %d\n",
1244 fwreq->hdr.type);
1245 break;
1246 }
1247
1248 /* Update Stats */
1249 cmpl_time = jiffies - start;
1250 if (cmpl_time > atomic64_read(&snic->s_stats.io.max_cmpl_time))
1251 atomic64_set(&snic->s_stats.io.max_cmpl_time, cmpl_time);
1252
1253 return 0;
1254 } /* end of snic_io_cmpl_handler */
1255
1256 /*
1257 * snic_fwcq_cmpl_handler
1258 * Routine to process fwCQ
1259 * This CQ is independent, and not associated with wq/rq/wq_copy queues
1260 */
1261 int
1262 snic_fwcq_cmpl_handler(struct snic *snic, int io_cmpl_work)
1263 {
1264 unsigned int num_ent = 0; /* number cq entries processed */
1265 unsigned int cq_idx;
1266 unsigned int nent_per_cq;
1267 struct snic_misc_stats *misc_stats = &snic->s_stats.misc;
1268
1269 for (cq_idx = snic->wq_count; cq_idx < snic->cq_count; cq_idx++) {
1270 nent_per_cq = vnic_cq_fw_service(&snic->cq[cq_idx],
1271 snic_io_cmpl_handler,
1272 io_cmpl_work);
1273 num_ent += nent_per_cq;
1274
1275 if (nent_per_cq > atomic64_read(&misc_stats->max_cq_ents))
1276 atomic64_set(&misc_stats->max_cq_ents, nent_per_cq);
1277 }
1278
1279 return num_ent;
1280 } /* end of snic_fwcq_cmpl_handler */
1281
1282 /*
1283 * snic_queue_itmf_req: Common API to queue Task Management requests.
1284 * Use rqi->tm_tag for passing special tags.
1285 * @req_id : aborted request's tag, -1 for lun reset.
1286 */
1287 static int
1288 snic_queue_itmf_req(struct snic *snic,
1289 struct snic_host_req *tmreq,
1290 struct scsi_cmnd *sc,
1291 u32 tmf,
1292 u32 req_id)
1293 {
1294 struct snic_req_info *rqi = req_to_rqi(tmreq);
1295 struct scsi_lun lun;
1296 int tm_tag = snic_cmd_tag(sc) | rqi->tm_tag;
1297 int ret = 0;
1298
1299 SNIC_BUG_ON(!rqi);
1300 SNIC_BUG_ON(!rqi->tm_tag);
1301
1302 /* fill in lun info */
1303 int_to_scsilun(sc->device->lun, &lun);
1304
1305 /* Initialize snic_host_req: itmf */
1306 snic_itmf_init(tmreq,
1307 tm_tag,
1308 snic->config.hid,
1309 (ulong) rqi,
1310 0 /* flags */,
1311 req_id, /* Command to be aborted. */
1312 rqi->tgt_id,
1313 lun.scsi_lun,
1314 tmf);
1315
1316 /*
1317 * In case of multiple aborts on same cmd,
1318 * use try_wait_for_completion and completion_done() to check
1319 * whether it queues aborts even after completion of abort issued
1320 * prior.SNIC_BUG_ON(completion_done(&rqi->done));
1321 */
1322
1323 ret = snic_queue_wq_desc(snic, tmreq, sizeof(*tmreq));
1324 if (ret)
1325 SNIC_HOST_ERR(snic->shost,
1326 "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d tag %d Failed, ret = %d\n",
1327 tmf, sc, rqi, req_id, snic_cmd_tag(sc), ret);
1328 else
1329 SNIC_SCSI_DBG(snic->shost,
1330 "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d, tag %d (req_id)- Success.",
1331 tmf, sc, rqi, req_id, snic_cmd_tag(sc));
1332
1333 return ret;
1334 } /* end of snic_queue_itmf_req */
1335
1336 static int
1337 snic_issue_tm_req(struct snic *snic,
1338 struct snic_req_info *rqi,
1339 struct scsi_cmnd *sc,
1340 int tmf)
1341 {
1342 struct snic_host_req *tmreq = NULL;
1343 int req_id = 0, tag = snic_cmd_tag(sc);
1344 int ret = 0;
1345
1346 if (snic_get_state(snic) == SNIC_FWRESET)
1347 return -EBUSY;
1348
1349 atomic_inc(&snic->ios_inflight);
1350
1351 SNIC_SCSI_DBG(snic->shost,
1352 "issu_tmreq: Task mgmt req %d. rqi %p w/ tag %x\n",
1353 tmf, rqi, tag);
1354
1355
1356 if (tmf == SNIC_ITMF_LUN_RESET) {
1357 tmreq = snic_dr_req_init(snic, rqi);
1358 req_id = SCSI_NO_TAG;
1359 } else {
1360 tmreq = snic_abort_req_init(snic, rqi);
1361 req_id = tag;
1362 }
1363
1364 if (!tmreq) {
1365 ret = -ENOMEM;
1366
1367 goto tmreq_err;
1368 }
1369
1370 ret = snic_queue_itmf_req(snic, tmreq, sc, tmf, req_id);
1371 if (ret)
1372 goto tmreq_err;
1373
1374 ret = 0;
1375
1376 tmreq_err:
1377 if (ret) {
1378 SNIC_HOST_ERR(snic->shost,
1379 "issu_tmreq: Queing ITMF(%d) Req, sc %p rqi %p req_id %d tag %x fails err = %d\n",
1380 tmf, sc, rqi, req_id, tag, ret);
1381 } else {
1382 SNIC_SCSI_DBG(snic->shost,
1383 "issu_tmreq: Queuing ITMF(%d) Req, sc %p, rqi %p, req_id %d tag %x - Success.\n",
1384 tmf, sc, rqi, req_id, tag);
1385 }
1386
1387 atomic_dec(&snic->ios_inflight);
1388
1389 return ret;
1390 }
1391
1392 /*
1393 * snic_queue_abort_req : Queues abort req to WQ
1394 */
1395 static int
1396 snic_queue_abort_req(struct snic *snic,
1397 struct snic_req_info *rqi,
1398 struct scsi_cmnd *sc,
1399 int tmf)
1400 {
1401 SNIC_SCSI_DBG(snic->shost, "q_abtreq: sc %p, rqi %p, tag %x, tmf %d\n",
1402 sc, rqi, snic_cmd_tag(sc), tmf);
1403
1404 /* Add special tag for abort */
1405 rqi->tm_tag |= SNIC_TAG_ABORT;
1406
1407 return snic_issue_tm_req(snic, rqi, sc, tmf);
1408 }
1409
1410 /*
1411 * snic_abort_finish : called by snic_abort_cmd on queuing abort successfully.
1412 */
1413 static int
1414 snic_abort_finish(struct snic *snic, struct scsi_cmnd *sc)
1415 {
1416 struct snic_req_info *rqi = NULL;
1417 spinlock_t *io_lock = NULL;
1418 unsigned long flags;
1419 int ret = 0, tag = snic_cmd_tag(sc);
1420
1421 io_lock = snic_io_lock_hash(snic, sc);
1422 spin_lock_irqsave(io_lock, flags);
1423 rqi = (struct snic_req_info *) CMD_SP(sc);
1424 if (!rqi) {
1425 atomic64_inc(&snic->s_stats.io.req_null);
1426 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
1427
1428 SNIC_SCSI_DBG(snic->shost,
1429 "abt_fini:req info is null tag 0x%x, sc 0x%p flags 0x%llx\n",
1430 tag, sc, CMD_FLAGS(sc));
1431 ret = FAILED;
1432
1433 goto abort_fail;
1434 }
1435
1436 rqi->abts_done = NULL;
1437
1438 ret = FAILED;
1439
1440 /* Check the abort status. */
1441 switch (CMD_ABTS_STATUS(sc)) {
1442 case SNIC_INVALID_CODE:
1443 /* Firmware didn't complete abort req, timedout */
1444 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TIMEDOUT;
1445 atomic64_inc(&snic->s_stats.abts.drv_tmo);
1446 SNIC_SCSI_DBG(snic->shost,
1447 "abt_fini:sc %p Tag %x Driver Timeout.flags 0x%llx\n",
1448 sc, snic_cmd_tag(sc), CMD_FLAGS(sc));
1449 /* do not release snic request in timedout case */
1450 rqi = NULL;
1451
1452 goto abort_fail;
1453
1454 case SNIC_STAT_IO_SUCCESS:
1455 case SNIC_STAT_IO_NOT_FOUND:
1456 ret = SUCCESS;
1457 break;
1458
1459 default:
1460 /* Firmware completed abort with error */
1461 ret = FAILED;
1462 break;
1463 }
1464
1465 CMD_SP(sc) = NULL;
1466 SNIC_HOST_INFO(snic->shost,
1467 "abt_fini: Tag %x, Cmpl Status %s flags 0x%llx\n",
1468 tag, snic_io_status_to_str(CMD_ABTS_STATUS(sc)),
1469 CMD_FLAGS(sc));
1470
1471 abort_fail:
1472 spin_unlock_irqrestore(io_lock, flags);
1473 if (rqi)
1474 snic_release_req_buf(snic, rqi, sc);
1475
1476 return ret;
1477 } /* end of snic_abort_finish */
1478
1479 /*
1480 * snic_send_abort_and_wait : Issues Abort, and Waits
1481 */
1482 static int
1483 snic_send_abort_and_wait(struct snic *snic, struct scsi_cmnd *sc)
1484 {
1485 struct snic_req_info *rqi = NULL;
1486 enum snic_ioreq_state sv_state;
1487 struct snic_tgt *tgt = NULL;
1488 spinlock_t *io_lock = NULL;
1489 DECLARE_COMPLETION_ONSTACK(tm_done);
1490 unsigned long flags;
1491 int ret = 0, tmf = 0, tag = snic_cmd_tag(sc);
1492
1493 tgt = starget_to_tgt(scsi_target(sc->device));
1494 if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN))
1495 tmf = SNIC_ITMF_ABTS_TASK_TERM;
1496 else
1497 tmf = SNIC_ITMF_ABTS_TASK;
1498
1499 /* stats */
1500
1501 io_lock = snic_io_lock_hash(snic, sc);
1502
1503 /*
1504 * Avoid a race between SCSI issuing the abort and the device
1505 * completing the command.
1506 *
1507 * If the command is already completed by fw_cmpl code,
1508 * we just return SUCCESS from here. This means that the abort
1509 * succeeded. In the SCSI ML, since the timeout for command has
1510 * happend, the completion wont actually complete the command
1511 * and it will be considered as an aborted command
1512 *
1513 * The CMD_SP will not be cleared except while holding io_lock
1514 */
1515 spin_lock_irqsave(io_lock, flags);
1516 rqi = (struct snic_req_info *) CMD_SP(sc);
1517 if (!rqi) {
1518 spin_unlock_irqrestore(io_lock, flags);
1519
1520 SNIC_HOST_ERR(snic->shost,
1521 "abt_cmd: rqi is null. Tag %d flags 0x%llx\n",
1522 tag, CMD_FLAGS(sc));
1523
1524 ret = SUCCESS;
1525
1526 goto send_abts_end;
1527 }
1528
1529 rqi->abts_done = &tm_done;
1530 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
1531 spin_unlock_irqrestore(io_lock, flags);
1532
1533 ret = 0;
1534 goto abts_pending;
1535 }
1536 SNIC_BUG_ON(!rqi->abts_done);
1537
1538 /* Save Command State, should be restored on failed to Queue. */
1539 sv_state = CMD_STATE(sc);
1540
1541 /*
1542 * Command is still pending, need to abort it
1543 * If the fw completes the command after this point,
1544 * the completion won't be done till mid-layer, since abot
1545 * has already started.
1546 */
1547 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
1548 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
1549
1550 SNIC_SCSI_DBG(snic->shost, "send_abt_cmd: TAG 0x%x\n", tag);
1551
1552 spin_unlock_irqrestore(io_lock, flags);
1553
1554 /* Now Queue the abort command to firmware */
1555 ret = snic_queue_abort_req(snic, rqi, sc, tmf);
1556 if (ret) {
1557 SNIC_HOST_ERR(snic->shost,
1558 "send_abt_cmd: IO w/ Tag 0x%x fail w/ err %d flags 0x%llx\n",
1559 tag, ret, CMD_FLAGS(sc));
1560
1561 spin_lock_irqsave(io_lock, flags);
1562 /* Restore Command's previous state */
1563 CMD_STATE(sc) = sv_state;
1564 rqi = (struct snic_req_info *) CMD_SP(sc);
1565 if (rqi)
1566 rqi->abts_done = NULL;
1567 spin_unlock_irqrestore(io_lock, flags);
1568 ret = FAILED;
1569
1570 goto send_abts_end;
1571 }
1572
1573 spin_lock_irqsave(io_lock, flags);
1574 if (tmf == SNIC_ITMF_ABTS_TASK) {
1575 CMD_FLAGS(sc) |= SNIC_IO_ABTS_ISSUED;
1576 atomic64_inc(&snic->s_stats.abts.num);
1577 } else {
1578 /* term stats */
1579 CMD_FLAGS(sc) |= SNIC_IO_TERM_ISSUED;
1580 }
1581 spin_unlock_irqrestore(io_lock, flags);
1582
1583 SNIC_SCSI_DBG(snic->shost,
1584 "send_abt_cmd: sc %p Tag %x flags 0x%llx\n",
1585 sc, tag, CMD_FLAGS(sc));
1586
1587
1588 ret = 0;
1589
1590 abts_pending:
1591 /*
1592 * Queued an abort IO, wait for its completion.
1593 * Once the fw completes the abort command, it will
1594 * wakeup this thread.
1595 */
1596 wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT);
1597
1598 send_abts_end:
1599 return ret;
1600 } /* end of snic_send_abort_and_wait */
1601
1602 /*
1603 * This function is exported to SCSI for sending abort cmnds.
1604 * A SCSI IO is represent by snic_ioreq in the driver.
1605 * The snic_ioreq is linked to the SCSI Cmd, thus a link with the ULP'S IO
1606 */
1607 int
1608 snic_abort_cmd(struct scsi_cmnd *sc)
1609 {
1610 struct snic *snic = shost_priv(sc->device->host);
1611 int ret = SUCCESS, tag = snic_cmd_tag(sc);
1612 u32 start_time = jiffies;
1613
1614 SNIC_SCSI_DBG(snic->shost, "abt_cmd:sc %p :0x%x :req = %p :tag = %d\n",
1615 sc, sc->cmnd[0], sc->request, tag);
1616
1617 if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) {
1618 SNIC_HOST_ERR(snic->shost,
1619 "abt_cmd: tag %x Parent Devs are not rdy\n",
1620 tag);
1621 ret = FAST_IO_FAIL;
1622
1623 goto abort_end;
1624 }
1625
1626
1627 ret = snic_send_abort_and_wait(snic, sc);
1628 if (ret)
1629 goto abort_end;
1630
1631 ret = snic_abort_finish(snic, sc);
1632
1633 abort_end:
1634 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
1635 jiffies_to_msecs(jiffies - start_time), 0,
1636 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
1637
1638 SNIC_SCSI_DBG(snic->shost,
1639 "abts: Abort Req Status = %s\n",
1640 (ret == SUCCESS) ? "SUCCESS" :
1641 ((ret == FAST_IO_FAIL) ? "FAST_IO_FAIL" : "FAILED"));
1642
1643 return ret;
1644 }
1645
1646
1647
1648 static int
1649 snic_is_abts_pending(struct snic *snic, struct scsi_cmnd *lr_sc)
1650 {
1651 struct snic_req_info *rqi = NULL;
1652 struct scsi_cmnd *sc = NULL;
1653 struct scsi_device *lr_sdev = NULL;
1654 spinlock_t *io_lock = NULL;
1655 u32 tag;
1656 unsigned long flags;
1657
1658 if (lr_sc)
1659 lr_sdev = lr_sc->device;
1660
1661 /* walk through the tag map, an dcheck if IOs are still pending in fw*/
1662 for (tag = 0; tag < snic->max_tag_id; tag++) {
1663 io_lock = snic_io_lock_tag(snic, tag);
1664
1665 spin_lock_irqsave(io_lock, flags);
1666 sc = scsi_host_find_tag(snic->shost, tag);
1667
1668 if (!sc || (lr_sc && (sc->device != lr_sdev || sc == lr_sc))) {
1669 spin_unlock_irqrestore(io_lock, flags);
1670
1671 continue;
1672 }
1673
1674 rqi = (struct snic_req_info *) CMD_SP(sc);
1675 if (!rqi) {
1676 spin_unlock_irqrestore(io_lock, flags);
1677
1678 continue;
1679 }
1680
1681 /*
1682 * Found IO that is still pending w/ firmware and belongs to
1683 * the LUN that is under reset, if lr_sc != NULL
1684 */
1685 SNIC_SCSI_DBG(snic->shost, "Found IO in %s on LUN\n",
1686 snic_ioreq_state_to_str(CMD_STATE(sc)));
1687
1688 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) {
1689 spin_unlock_irqrestore(io_lock, flags);
1690
1691 return 1;
1692 }
1693
1694 spin_unlock_irqrestore(io_lock, flags);
1695 }
1696
1697 return 0;
1698 } /* end of snic_is_abts_pending */
1699
1700 static int
1701 snic_dr_clean_single_req(struct snic *snic,
1702 u32 tag,
1703 struct scsi_device *lr_sdev)
1704 {
1705 struct snic_req_info *rqi = NULL;
1706 struct snic_tgt *tgt = NULL;
1707 struct scsi_cmnd *sc = NULL;
1708 spinlock_t *io_lock = NULL;
1709 u32 sv_state = 0, tmf = 0;
1710 DECLARE_COMPLETION_ONSTACK(tm_done);
1711 unsigned long flags;
1712 int ret = 0;
1713
1714 io_lock = snic_io_lock_tag(snic, tag);
1715 spin_lock_irqsave(io_lock, flags);
1716 sc = scsi_host_find_tag(snic->shost, tag);
1717
1718 /* Ignore Cmd that don't belong to Lun Reset device */
1719 if (!sc || sc->device != lr_sdev)
1720 goto skip_clean;
1721
1722 rqi = (struct snic_req_info *) CMD_SP(sc);
1723
1724 if (!rqi)
1725 goto skip_clean;
1726
1727
1728 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
1729 goto skip_clean;
1730
1731
1732 if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) &&
1733 (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) {
1734
1735 SNIC_SCSI_DBG(snic->shost,
1736 "clean_single_req: devrst is not pending sc 0x%p\n",
1737 sc);
1738
1739 goto skip_clean;
1740 }
1741
1742 SNIC_SCSI_DBG(snic->shost,
1743 "clean_single_req: Found IO in %s on lun\n",
1744 snic_ioreq_state_to_str(CMD_STATE(sc)));
1745
1746 /* Save Command State */
1747 sv_state = CMD_STATE(sc);
1748
1749 /*
1750 * Any pending IO issued prior to reset is expected to be
1751 * in abts pending state, if not we need to set SNIC_IOREQ_ABTS_PENDING
1752 * to indicate the IO is abort pending.
1753 * When IO is completed, the IO will be handed over and handled
1754 * in this function.
1755 */
1756
1757 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
1758 SNIC_BUG_ON(rqi->abts_done);
1759
1760 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) {
1761 rqi->tm_tag = SNIC_TAG_DEV_RST;
1762
1763 SNIC_SCSI_DBG(snic->shost,
1764 "clean_single_req:devrst sc 0x%p\n", sc);
1765 }
1766
1767 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
1768 rqi->abts_done = &tm_done;
1769 spin_unlock_irqrestore(io_lock, flags);
1770
1771 tgt = starget_to_tgt(scsi_target(sc->device));
1772 if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN))
1773 tmf = SNIC_ITMF_ABTS_TASK_TERM;
1774 else
1775 tmf = SNIC_ITMF_ABTS_TASK;
1776
1777 /* Now queue the abort command to firmware */
1778 ret = snic_queue_abort_req(snic, rqi, sc, tmf);
1779 if (ret) {
1780 SNIC_HOST_ERR(snic->shost,
1781 "clean_single_req_err:sc %p, tag %d abt failed. tm_tag %d flags 0x%llx\n",
1782 sc, tag, rqi->tm_tag, CMD_FLAGS(sc));
1783
1784 spin_lock_irqsave(io_lock, flags);
1785 rqi = (struct snic_req_info *) CMD_SP(sc);
1786 if (rqi)
1787 rqi->abts_done = NULL;
1788
1789 /* Restore Command State */
1790 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
1791 CMD_STATE(sc) = sv_state;
1792
1793 ret = 1;
1794 goto skip_clean;
1795 }
1796
1797 spin_lock_irqsave(io_lock, flags);
1798 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET)
1799 CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED;
1800
1801 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED;
1802 spin_unlock_irqrestore(io_lock, flags);
1803
1804 wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT);
1805
1806 /* Recheck cmd state to check if it now aborted. */
1807 spin_lock_irqsave(io_lock, flags);
1808 rqi = (struct snic_req_info *) CMD_SP(sc);
1809 if (!rqi) {
1810 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL;
1811 goto skip_clean;
1812 }
1813 rqi->abts_done = NULL;
1814
1815 /* if abort is still pending w/ fw, fail */
1816 if (CMD_ABTS_STATUS(sc) == SNIC_INVALID_CODE) {
1817 SNIC_HOST_ERR(snic->shost,
1818 "clean_single_req_err:sc %p tag %d abt still pending w/ fw, tm_tag %d flags 0x%llx\n",
1819 sc, tag, rqi->tm_tag, CMD_FLAGS(sc));
1820
1821 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE;
1822 ret = 1;
1823
1824 goto skip_clean;
1825 }
1826
1827 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE;
1828 CMD_SP(sc) = NULL;
1829 spin_unlock_irqrestore(io_lock, flags);
1830
1831 snic_release_req_buf(snic, rqi, sc);
1832
1833 ret = 0;
1834
1835 return ret;
1836
1837 skip_clean:
1838 spin_unlock_irqrestore(io_lock, flags);
1839
1840 return ret;
1841 } /* end of snic_dr_clean_single_req */
1842
1843 static int
1844 snic_dr_clean_pending_req(struct snic *snic, struct scsi_cmnd *lr_sc)
1845 {
1846 struct scsi_device *lr_sdev = lr_sc->device;
1847 u32 tag = 0;
1848 int ret = FAILED;
1849
1850 for (tag = 0; tag < snic->max_tag_id; tag++) {
1851 if (tag == snic_cmd_tag(lr_sc))
1852 continue;
1853
1854 ret = snic_dr_clean_single_req(snic, tag, lr_sdev);
1855 if (ret) {
1856 SNIC_HOST_ERR(snic->shost, "clean_err:tag = %d\n", tag);
1857
1858 goto clean_err;
1859 }
1860 }
1861
1862 schedule_timeout(msecs_to_jiffies(100));
1863
1864 /* Walk through all the cmds and check abts status. */
1865 if (snic_is_abts_pending(snic, lr_sc)) {
1866 ret = FAILED;
1867
1868 goto clean_err;
1869 }
1870
1871 ret = 0;
1872 SNIC_SCSI_DBG(snic->shost, "clean_pending_req: Success.\n");
1873
1874 return ret;
1875
1876 clean_err:
1877 ret = FAILED;
1878 SNIC_HOST_ERR(snic->shost,
1879 "Failed to Clean Pending IOs on %s device.\n",
1880 dev_name(&lr_sdev->sdev_gendev));
1881
1882 return ret;
1883
1884 } /* end of snic_dr_clean_pending_req */
1885
1886 /*
1887 * snic_dr_finish : Called by snic_device_reset
1888 */
1889 static int
1890 snic_dr_finish(struct snic *snic, struct scsi_cmnd *sc)
1891 {
1892 struct snic_req_info *rqi = NULL;
1893 spinlock_t *io_lock = NULL;
1894 unsigned long flags;
1895 int lr_res = 0;
1896 int ret = FAILED;
1897
1898 io_lock = snic_io_lock_hash(snic, sc);
1899 spin_lock_irqsave(io_lock, flags);
1900 rqi = (struct snic_req_info *) CMD_SP(sc);
1901 if (!rqi) {
1902 spin_unlock_irqrestore(io_lock, flags);
1903 SNIC_SCSI_DBG(snic->shost,
1904 "dr_fini: rqi is null tag 0x%x sc 0x%p flags 0x%llx\n",
1905 snic_cmd_tag(sc), sc, CMD_FLAGS(sc));
1906
1907 ret = FAILED;
1908 goto dr_fini_end;
1909 }
1910
1911 rqi->dr_done = NULL;
1912
1913 lr_res = CMD_LR_STATUS(sc);
1914
1915 switch (lr_res) {
1916 case SNIC_INVALID_CODE:
1917 /* stats */
1918 SNIC_SCSI_DBG(snic->shost,
1919 "dr_fini: Tag %x Dev Reset Timedout. flags 0x%llx\n",
1920 snic_cmd_tag(sc), CMD_FLAGS(sc));
1921
1922 CMD_FLAGS(sc) |= SNIC_DEV_RST_TIMEDOUT;
1923 ret = FAILED;
1924
1925 goto dr_failed;
1926
1927 case SNIC_STAT_IO_SUCCESS:
1928 SNIC_SCSI_DBG(snic->shost,
1929 "dr_fini: Tag %x Dev Reset cmpl\n",
1930 snic_cmd_tag(sc));
1931 ret = 0;
1932 break;
1933
1934 default:
1935 SNIC_HOST_ERR(snic->shost,
1936 "dr_fini:Device Reset completed& failed.Tag = %x lr_status %s flags 0x%llx\n",
1937 snic_cmd_tag(sc),
1938 snic_io_status_to_str(lr_res), CMD_FLAGS(sc));
1939 ret = FAILED;
1940 goto dr_failed;
1941 }
1942 spin_unlock_irqrestore(io_lock, flags);
1943
1944 /*
1945 * Cleanup any IOs on this LUN that have still not completed.
1946 * If any of these fail, then LUN Reset fails.
1947 * Cleanup cleans all commands on this LUN except
1948 * the lun reset command. If all cmds get cleaned, the LUN Reset
1949 * succeeds.
1950 */
1951
1952 ret = snic_dr_clean_pending_req(snic, sc);
1953 if (ret) {
1954 spin_lock_irqsave(io_lock, flags);
1955 SNIC_SCSI_DBG(snic->shost,
1956 "dr_fini: Device Reset Failed since could not abort all IOs. Tag = %x.\n",
1957 snic_cmd_tag(sc));
1958 rqi = (struct snic_req_info *) CMD_SP(sc);
1959
1960 goto dr_failed;
1961 } else {
1962 /* Cleanup LUN Reset Command */
1963 spin_lock_irqsave(io_lock, flags);
1964 rqi = (struct snic_req_info *) CMD_SP(sc);
1965 if (rqi)
1966 ret = SUCCESS; /* Completed Successfully */
1967 else
1968 ret = FAILED;
1969 }
1970
1971 dr_failed:
1972 SNIC_BUG_ON(!spin_is_locked(io_lock));
1973 if (rqi)
1974 CMD_SP(sc) = NULL;
1975 spin_unlock_irqrestore(io_lock, flags);
1976
1977 if (rqi)
1978 snic_release_req_buf(snic, rqi, sc);
1979
1980 dr_fini_end:
1981 return ret;
1982 } /* end of snic_dr_finish */
1983
1984 static int
1985 snic_queue_dr_req(struct snic *snic,
1986 struct snic_req_info *rqi,
1987 struct scsi_cmnd *sc)
1988 {
1989 /* Add special tag for device reset */
1990 rqi->tm_tag |= SNIC_TAG_DEV_RST;
1991
1992 return snic_issue_tm_req(snic, rqi, sc, SNIC_ITMF_LUN_RESET);
1993 }
1994
1995 static int
1996 snic_send_dr_and_wait(struct snic *snic, struct scsi_cmnd *sc)
1997 {
1998 struct snic_req_info *rqi = NULL;
1999 enum snic_ioreq_state sv_state;
2000 spinlock_t *io_lock = NULL;
2001 unsigned long flags;
2002 DECLARE_COMPLETION_ONSTACK(tm_done);
2003 int ret = FAILED, tag = snic_cmd_tag(sc);
2004
2005 io_lock = snic_io_lock_hash(snic, sc);
2006 spin_lock_irqsave(io_lock, flags);
2007 CMD_FLAGS(sc) |= SNIC_DEVICE_RESET;
2008 rqi = (struct snic_req_info *) CMD_SP(sc);
2009 if (!rqi) {
2010 SNIC_HOST_ERR(snic->shost,
2011 "send_dr: rqi is null, Tag 0x%x flags 0x%llx\n",
2012 tag, CMD_FLAGS(sc));
2013 spin_unlock_irqrestore(io_lock, flags);
2014
2015 ret = FAILED;
2016 goto send_dr_end;
2017 }
2018
2019 /* Save Command state to restore in case Queuing failed. */
2020 sv_state = CMD_STATE(sc);
2021
2022 CMD_STATE(sc) = SNIC_IOREQ_LR_PENDING;
2023 CMD_LR_STATUS(sc) = SNIC_INVALID_CODE;
2024
2025 SNIC_SCSI_DBG(snic->shost, "dr: TAG = %x\n", tag);
2026
2027 rqi->dr_done = &tm_done;
2028 SNIC_BUG_ON(!rqi->dr_done);
2029
2030 spin_unlock_irqrestore(io_lock, flags);
2031 /*
2032 * The Command state is changed to IOREQ_PENDING,
2033 * in this case, if the command is completed, the icmnd_cmpl will
2034 * mark the cmd as completed.
2035 * This logic still makes LUN Reset is inevitable.
2036 */
2037
2038 ret = snic_queue_dr_req(snic, rqi, sc);
2039 if (ret) {
2040 SNIC_HOST_ERR(snic->shost,
2041 "send_dr: IO w/ Tag 0x%x Failed err = %d. flags 0x%llx\n",
2042 tag, ret, CMD_FLAGS(sc));
2043
2044 spin_lock_irqsave(io_lock, flags);
2045 /* Restore State */
2046 CMD_STATE(sc) = sv_state;
2047 rqi = (struct snic_req_info *) CMD_SP(sc);
2048 if (rqi)
2049 rqi->dr_done = NULL;
2050 /* rqi is freed in caller. */
2051 spin_unlock_irqrestore(io_lock, flags);
2052 ret = FAILED;
2053
2054 goto send_dr_end;
2055 }
2056
2057 spin_lock_irqsave(io_lock, flags);
2058 CMD_FLAGS(sc) |= SNIC_DEV_RST_ISSUED;
2059 spin_unlock_irqrestore(io_lock, flags);
2060
2061 ret = 0;
2062
2063 wait_for_completion_timeout(&tm_done, SNIC_LUN_RESET_TIMEOUT);
2064
2065 send_dr_end:
2066 return ret;
2067 }
2068
2069 /*
2070 * auxillary funciton to check lun reset op is supported or not
2071 * Not supported if returns 0
2072 */
2073 static int
2074 snic_dev_reset_supported(struct scsi_device *sdev)
2075 {
2076 struct snic_tgt *tgt = starget_to_tgt(scsi_target(sdev));
2077
2078 if (tgt->tdata.typ == SNIC_TGT_DAS)
2079 return 0;
2080
2081 return 1;
2082 }
2083
2084 static void
2085 snic_unlink_and_release_req(struct snic *snic, struct scsi_cmnd *sc, int flag)
2086 {
2087 struct snic_req_info *rqi = NULL;
2088 spinlock_t *io_lock = NULL;
2089 unsigned long flags;
2090 u32 start_time = jiffies;
2091
2092 io_lock = snic_io_lock_hash(snic, sc);
2093 spin_lock_irqsave(io_lock, flags);
2094 rqi = (struct snic_req_info *) CMD_SP(sc);
2095 if (rqi) {
2096 start_time = rqi->start_time;
2097 CMD_SP(sc) = NULL;
2098 }
2099
2100 CMD_FLAGS(sc) |= flag;
2101 spin_unlock_irqrestore(io_lock, flags);
2102
2103 if (rqi)
2104 snic_release_req_buf(snic, rqi, sc);
2105
2106 SNIC_TRC(snic->shost->host_no, snic_cmd_tag(sc), (ulong) sc,
2107 jiffies_to_msecs(jiffies - start_time), (ulong) rqi,
2108 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
2109 }
2110
2111 /*
2112 * SCSI Eh thread issues a LUN Reset when one or more commands on a LUN
2113 * fail to get aborted. It calls driver's eh_device_reset with a SCSI
2114 * command on the LUN.
2115 */
2116 int
2117 snic_device_reset(struct scsi_cmnd *sc)
2118 {
2119 struct Scsi_Host *shost = sc->device->host;
2120 struct snic *snic = shost_priv(shost);
2121 struct snic_req_info *rqi = NULL;
2122 int tag = snic_cmd_tag(sc);
2123 int start_time = jiffies;
2124 int ret = FAILED;
2125 int dr_supp = 0;
2126
2127 SNIC_SCSI_DBG(shost, "dev_reset:sc %p :0x%x :req = %p :tag = %d\n",
2128 sc, sc->cmnd[0], sc->request,
2129 snic_cmd_tag(sc));
2130 dr_supp = snic_dev_reset_supported(sc->device);
2131 if (!dr_supp) {
2132 /* device reset op is not supported */
2133 SNIC_HOST_INFO(shost, "LUN Reset Op not supported.\n");
2134 snic_unlink_and_release_req(snic, sc, SNIC_DEV_RST_NOTSUP);
2135
2136 goto dev_rst_end;
2137 }
2138
2139 if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) {
2140 snic_unlink_and_release_req(snic, sc, 0);
2141 SNIC_HOST_ERR(shost, "Devrst: Parent Devs are not online.\n");
2142
2143 goto dev_rst_end;
2144 }
2145
2146 /* There is no tag when lun reset is issue through ioctl. */
2147 if (unlikely(tag <= SNIC_NO_TAG)) {
2148 SNIC_HOST_INFO(snic->shost,
2149 "Devrst: LUN Reset Recvd thru IOCTL.\n");
2150
2151 rqi = snic_req_init(snic, 0);
2152 if (!rqi)
2153 goto dev_rst_end;
2154
2155 memset(scsi_cmd_priv(sc), 0,
2156 sizeof(struct snic_internal_io_state));
2157 CMD_SP(sc) = (char *)rqi;
2158 CMD_FLAGS(sc) = SNIC_NO_FLAGS;
2159
2160 /* Add special tag for dr coming from user spc */
2161 rqi->tm_tag = SNIC_TAG_IOCTL_DEV_RST;
2162 rqi->sc = sc;
2163 }
2164
2165 ret = snic_send_dr_and_wait(snic, sc);
2166 if (ret) {
2167 SNIC_HOST_ERR(snic->shost,
2168 "Devrst: IO w/ Tag %x Failed w/ err = %d\n",
2169 tag, ret);
2170
2171 snic_unlink_and_release_req(snic, sc, 0);
2172
2173 goto dev_rst_end;
2174 }
2175
2176 ret = snic_dr_finish(snic, sc);
2177
2178 dev_rst_end:
2179 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
2180 jiffies_to_msecs(jiffies - start_time),
2181 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
2182
2183 SNIC_SCSI_DBG(snic->shost,
2184 "Devrst: Returning from Device Reset : %s\n",
2185 (ret == SUCCESS) ? "SUCCESS" : "FAILED");
2186
2187 return ret;
2188 } /* end of snic_device_reset */
2189
2190 /*
2191 * SCSI Error handling calls driver's eh_host_reset if all prior
2192 * error handling levels return FAILED.
2193 *
2194 * Host Reset is the highest level of error recovery. If this fails, then
2195 * host is offlined by SCSI.
2196 */
2197 /*
2198 * snic_issue_hba_reset : Queues FW Reset Request.
2199 */
2200 static int
2201 snic_issue_hba_reset(struct snic *snic, struct scsi_cmnd *sc)
2202 {
2203 struct snic_req_info *rqi = NULL;
2204 struct snic_host_req *req = NULL;
2205 spinlock_t *io_lock = NULL;
2206 DECLARE_COMPLETION_ONSTACK(wait);
2207 unsigned long flags;
2208 int ret = -ENOMEM;
2209
2210 rqi = snic_req_init(snic, 0);
2211 if (!rqi) {
2212 ret = -ENOMEM;
2213
2214 goto hba_rst_end;
2215 }
2216
2217 if (snic_cmd_tag(sc) == SCSI_NO_TAG) {
2218 memset(scsi_cmd_priv(sc), 0,
2219 sizeof(struct snic_internal_io_state));
2220 SNIC_HOST_INFO(snic->shost, "issu_hr:Host reset thru ioctl.\n");
2221 rqi->sc = sc;
2222 }
2223
2224 req = rqi_to_req(rqi);
2225
2226 io_lock = snic_io_lock_hash(snic, sc);
2227 spin_lock_irqsave(io_lock, flags);
2228 SNIC_BUG_ON(CMD_SP(sc) != NULL);
2229 CMD_STATE(sc) = SNIC_IOREQ_PENDING;
2230 CMD_SP(sc) = (char *) rqi;
2231 CMD_FLAGS(sc) |= SNIC_IO_INITIALIZED;
2232 snic->remove_wait = &wait;
2233 spin_unlock_irqrestore(io_lock, flags);
2234
2235 /* Initialize Request */
2236 snic_io_hdr_enc(&req->hdr, SNIC_REQ_HBA_RESET, 0, snic_cmd_tag(sc),
2237 snic->config.hid, 0, (ulong) rqi);
2238
2239 req->u.reset.flags = 0;
2240
2241 ret = snic_queue_wq_desc(snic, req, sizeof(*req));
2242 if (ret) {
2243 SNIC_HOST_ERR(snic->shost,
2244 "issu_hr:Queuing HBA Reset Failed. w err %d\n",
2245 ret);
2246
2247 goto hba_rst_err;
2248 }
2249
2250 spin_lock_irqsave(io_lock, flags);
2251 CMD_FLAGS(sc) |= SNIC_HOST_RESET_ISSUED;
2252 spin_unlock_irqrestore(io_lock, flags);
2253 atomic64_inc(&snic->s_stats.reset.hba_resets);
2254 SNIC_HOST_INFO(snic->shost, "Queued HBA Reset Successfully.\n");
2255
2256 wait_for_completion_timeout(snic->remove_wait,
2257 SNIC_HOST_RESET_TIMEOUT);
2258
2259 if (snic_get_state(snic) == SNIC_FWRESET) {
2260 SNIC_HOST_ERR(snic->shost, "reset_cmpl: Reset Timedout.\n");
2261 ret = -ETIMEDOUT;
2262
2263 goto hba_rst_err;
2264 }
2265
2266 spin_lock_irqsave(io_lock, flags);
2267 snic->remove_wait = NULL;
2268 rqi = (struct snic_req_info *) CMD_SP(sc);
2269 CMD_SP(sc) = NULL;
2270 spin_unlock_irqrestore(io_lock, flags);
2271
2272 if (rqi)
2273 snic_req_free(snic, rqi);
2274
2275 ret = 0;
2276
2277 return ret;
2278
2279 hba_rst_err:
2280 spin_lock_irqsave(io_lock, flags);
2281 snic->remove_wait = NULL;
2282 rqi = (struct snic_req_info *) CMD_SP(sc);
2283 CMD_SP(sc) = NULL;
2284 spin_unlock_irqrestore(io_lock, flags);
2285
2286 if (rqi)
2287 snic_req_free(snic, rqi);
2288
2289 hba_rst_end:
2290 SNIC_HOST_ERR(snic->shost,
2291 "reset:HBA Reset Failed w/ err = %d.\n",
2292 ret);
2293
2294 return ret;
2295 } /* end of snic_issue_hba_reset */
2296
2297 int
2298 snic_reset(struct Scsi_Host *shost, struct scsi_cmnd *sc)
2299 {
2300 struct snic *snic = shost_priv(shost);
2301 enum snic_state sv_state;
2302 unsigned long flags;
2303 int ret = FAILED;
2304
2305 /* Set snic state as SNIC_FWRESET*/
2306 sv_state = snic_get_state(snic);
2307
2308 spin_lock_irqsave(&snic->snic_lock, flags);
2309 if (snic_get_state(snic) == SNIC_FWRESET) {
2310 spin_unlock_irqrestore(&snic->snic_lock, flags);
2311 SNIC_HOST_INFO(shost, "reset:prev reset is in progres\n");
2312
2313 msleep(SNIC_HOST_RESET_TIMEOUT);
2314 ret = SUCCESS;
2315
2316 goto reset_end;
2317 }
2318
2319 snic_set_state(snic, SNIC_FWRESET);
2320 spin_unlock_irqrestore(&snic->snic_lock, flags);
2321
2322
2323 /* Wait for all the IOs that are entered in Qcmd */
2324 while (atomic_read(&snic->ios_inflight))
2325 schedule_timeout(msecs_to_jiffies(1));
2326
2327 ret = snic_issue_hba_reset(snic, sc);
2328 if (ret) {
2329 SNIC_HOST_ERR(shost,
2330 "reset:Host Reset Failed w/ err %d.\n",
2331 ret);
2332 spin_lock_irqsave(&snic->snic_lock, flags);
2333 snic_set_state(snic, sv_state);
2334 spin_unlock_irqrestore(&snic->snic_lock, flags);
2335 atomic64_inc(&snic->s_stats.reset.hba_reset_fail);
2336 ret = FAILED;
2337
2338 goto reset_end;
2339 }
2340
2341 ret = SUCCESS;
2342
2343 reset_end:
2344 return ret;
2345 } /* end of snic_reset */
2346
2347 /*
2348 * SCSI Error handling calls driver's eh_host_reset if all prior
2349 * error handling levels return FAILED.
2350 *
2351 * Host Reset is the highest level of error recovery. If this fails, then
2352 * host is offlined by SCSI.
2353 */
2354 int
2355 snic_host_reset(struct scsi_cmnd *sc)
2356 {
2357 struct Scsi_Host *shost = sc->device->host;
2358 u32 start_time = jiffies;
2359 int ret = FAILED;
2360
2361 SNIC_SCSI_DBG(shost,
2362 "host reset:sc %p sc_cmd 0x%x req %p tag %d flags 0x%llx\n",
2363 sc, sc->cmnd[0], sc->request,
2364 snic_cmd_tag(sc), CMD_FLAGS(sc));
2365
2366 ret = snic_reset(shost, sc);
2367
2368 SNIC_TRC(shost->host_no, snic_cmd_tag(sc), (ulong) sc,
2369 jiffies_to_msecs(jiffies - start_time),
2370 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc));
2371
2372 return ret;
2373 } /* end of snic_host_reset */
2374
2375 /*
2376 * snic_cmpl_pending_tmreq : Caller should hold io_lock
2377 */
2378 static void
2379 snic_cmpl_pending_tmreq(struct snic *snic, struct scsi_cmnd *sc)
2380 {
2381 struct snic_req_info *rqi = NULL;
2382
2383 SNIC_SCSI_DBG(snic->shost,
2384 "Completing Pending TM Req sc %p, state %s flags 0x%llx\n",
2385 sc, snic_io_status_to_str(CMD_STATE(sc)), CMD_FLAGS(sc));
2386
2387 rqi = (struct snic_req_info *) CMD_SP(sc);
2388 if (!rqi)
2389 return;
2390
2391 if (rqi->dr_done)
2392 complete(rqi->dr_done);
2393 else if (rqi->abts_done)
2394 complete(rqi->abts_done);
2395 }
2396
2397 /*
2398 * snic_scsi_cleanup: Walks through tag map and releases the reqs
2399 */
2400 static void
2401 snic_scsi_cleanup(struct snic *snic, int ex_tag)
2402 {
2403 struct snic_req_info *rqi = NULL;
2404 struct scsi_cmnd *sc = NULL;
2405 spinlock_t *io_lock = NULL;
2406 unsigned long flags;
2407 int tag;
2408 u64 st_time = 0;
2409
2410 SNIC_SCSI_DBG(snic->shost, "sc_clean: scsi cleanup.\n");
2411
2412 for (tag = 0; tag < snic->max_tag_id; tag++) {
2413 /* Skip ex_tag */
2414 if (tag == ex_tag)
2415 continue;
2416
2417 io_lock = snic_io_lock_tag(snic, tag);
2418 spin_lock_irqsave(io_lock, flags);
2419 sc = scsi_host_find_tag(snic->shost, tag);
2420 if (!sc) {
2421 spin_unlock_irqrestore(io_lock, flags);
2422
2423 continue;
2424 }
2425
2426 if (unlikely(snic_tmreq_pending(sc))) {
2427 /*
2428 * When FW Completes reset w/o sending completions
2429 * for outstanding ios.
2430 */
2431 snic_cmpl_pending_tmreq(snic, sc);
2432 spin_unlock_irqrestore(io_lock, flags);
2433
2434 continue;
2435 }
2436
2437 rqi = (struct snic_req_info *) CMD_SP(sc);
2438 if (!rqi) {
2439 spin_unlock_irqrestore(io_lock, flags);
2440
2441 goto cleanup;
2442 }
2443
2444 SNIC_SCSI_DBG(snic->shost,
2445 "sc_clean: sc %p, rqi %p, tag %d flags 0x%llx\n",
2446 sc, rqi, tag, CMD_FLAGS(sc));
2447
2448 CMD_SP(sc) = NULL;
2449 CMD_FLAGS(sc) |= SNIC_SCSI_CLEANUP;
2450 spin_unlock_irqrestore(io_lock, flags);
2451 st_time = rqi->start_time;
2452
2453 SNIC_HOST_INFO(snic->shost,
2454 "sc_clean: Releasing rqi %p : flags 0x%llx\n",
2455 rqi, CMD_FLAGS(sc));
2456
2457 snic_release_req_buf(snic, rqi, sc);
2458
2459 cleanup:
2460 sc->result = DID_TRANSPORT_DISRUPTED << 16;
2461 SNIC_HOST_INFO(snic->shost,
2462 "sc_clean: DID_TRANSPORT_DISRUPTED for sc %p. rqi %p duration %llu msecs\n",
2463 sc, rqi, (jiffies - st_time));
2464
2465 /* Update IO stats */
2466 snic_stats_update_io_cmpl(&snic->s_stats);
2467
2468 if (sc->scsi_done) {
2469 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc,
2470 jiffies_to_msecs(jiffies - st_time), 0,
2471 SNIC_TRC_CMD(sc),
2472 SNIC_TRC_CMD_STATE_FLAGS(sc));
2473
2474 sc->scsi_done(sc);
2475 }
2476 }
2477 } /* end of snic_scsi_cleanup */
2478
2479 void
2480 snic_shutdown_scsi_cleanup(struct snic *snic)
2481 {
2482 SNIC_HOST_INFO(snic->shost, "Shutdown time SCSI Cleanup.\n");
2483
2484 snic_scsi_cleanup(snic, SCSI_NO_TAG);
2485 } /* end of snic_shutdown_scsi_cleanup */
2486
2487 /*
2488 * snic_internal_abort_io
2489 * called by : snic_tgt_scsi_abort_io
2490 */
2491 static int
2492 snic_internal_abort_io(struct snic *snic, struct scsi_cmnd *sc, int tmf)
2493 {
2494 struct snic_req_info *rqi = NULL;
2495 spinlock_t *io_lock = NULL;
2496 unsigned long flags;
2497 u32 sv_state = 0;
2498 int ret = 0;
2499
2500 io_lock = snic_io_lock_hash(snic, sc);
2501 spin_lock_irqsave(io_lock, flags);
2502 rqi = (struct snic_req_info *) CMD_SP(sc);
2503 if (!rqi)
2504 goto skip_internal_abts;
2505
2506 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
2507 goto skip_internal_abts;
2508
2509 if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) &&
2510 (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) {
2511
2512 SNIC_SCSI_DBG(snic->shost,
2513 "internal_abts: dev rst not pending sc 0x%p\n",
2514 sc);
2515
2516 goto skip_internal_abts;
2517 }
2518
2519
2520 if (!(CMD_FLAGS(sc) & SNIC_IO_ISSUED)) {
2521 SNIC_SCSI_DBG(snic->shost,
2522 "internal_abts: IO not yet issued sc 0x%p tag 0x%x flags 0x%llx state %d\n",
2523 sc, snic_cmd_tag(sc), CMD_FLAGS(sc), CMD_STATE(sc));
2524
2525 goto skip_internal_abts;
2526 }
2527
2528 sv_state = CMD_STATE(sc);
2529 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING;
2530 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE;
2531 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_PENDING;
2532
2533 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) {
2534 /* stats */
2535 rqi->tm_tag = SNIC_TAG_DEV_RST;
2536 SNIC_SCSI_DBG(snic->shost, "internal_abts:dev rst sc %p\n", sc);
2537 }
2538
2539 SNIC_SCSI_DBG(snic->shost, "internal_abts: Issuing abts tag %x\n",
2540 snic_cmd_tag(sc));
2541 SNIC_BUG_ON(rqi->abts_done);
2542 spin_unlock_irqrestore(io_lock, flags);
2543
2544 ret = snic_queue_abort_req(snic, rqi, sc, tmf);
2545 if (ret) {
2546 SNIC_HOST_ERR(snic->shost,
2547 "internal_abts: Tag = %x , Failed w/ err = %d\n",
2548 snic_cmd_tag(sc), ret);
2549
2550 spin_lock_irqsave(io_lock, flags);
2551
2552 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING)
2553 CMD_STATE(sc) = sv_state;
2554
2555 goto skip_internal_abts;
2556 }
2557
2558 spin_lock_irqsave(io_lock, flags);
2559 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET)
2560 CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED;
2561 else
2562 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED;
2563
2564 ret = SUCCESS;
2565
2566 skip_internal_abts:
2567 SNIC_BUG_ON(!spin_is_locked(io_lock));
2568 spin_unlock_irqrestore(io_lock, flags);
2569
2570 return ret;
2571 } /* end of snic_internal_abort_io */
2572
2573 /*
2574 * snic_tgt_scsi_abort_io : called by snic_tgt_del
2575 */
2576 int
2577 snic_tgt_scsi_abort_io(struct snic_tgt *tgt)
2578 {
2579 struct snic *snic = NULL;
2580 struct scsi_cmnd *sc = NULL;
2581 struct snic_tgt *sc_tgt = NULL;
2582 spinlock_t *io_lock = NULL;
2583 unsigned long flags;
2584 int ret = 0, tag, abt_cnt = 0, tmf = 0;
2585
2586 if (!tgt)
2587 return -1;
2588
2589 snic = shost_priv(snic_tgt_to_shost(tgt));
2590 SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: Cleaning Pending IOs.\n");
2591
2592 if (tgt->tdata.typ == SNIC_TGT_DAS)
2593 tmf = SNIC_ITMF_ABTS_TASK;
2594 else
2595 tmf = SNIC_ITMF_ABTS_TASK_TERM;
2596
2597 for (tag = 0; tag < snic->max_tag_id; tag++) {
2598 io_lock = snic_io_lock_tag(snic, tag);
2599
2600 spin_lock_irqsave(io_lock, flags);
2601 sc = scsi_host_find_tag(snic->shost, tag);
2602 if (!sc) {
2603 spin_unlock_irqrestore(io_lock, flags);
2604
2605 continue;
2606 }
2607
2608 sc_tgt = starget_to_tgt(scsi_target(sc->device));
2609 if (sc_tgt != tgt) {
2610 spin_unlock_irqrestore(io_lock, flags);
2611
2612 continue;
2613 }
2614 spin_unlock_irqrestore(io_lock, flags);
2615
2616 ret = snic_internal_abort_io(snic, sc, tmf);
2617 if (ret < 0) {
2618 SNIC_HOST_ERR(snic->shost,
2619 "tgt_abt_io: Tag %x, Failed w err = %d\n",
2620 tag, ret);
2621
2622 continue;
2623 }
2624
2625 if (ret == SUCCESS)
2626 abt_cnt++;
2627 }
2628
2629 SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: abt_cnt = %d\n", abt_cnt);
2630
2631 return 0;
2632 } /* end of snic_tgt_scsi_abort_io */
Linux with added FPC-III support