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 atomic64_inc(&snic->s_stats.io.active); 225 ret = snic_queue_wq_desc(snic, rqi->req, rqi->req_len); 226 if (ret) { 227 atomic64_dec(&snic->s_stats.io.active); 228 SNIC_HOST_ERR(snic->shost, 229 "QIcmnd: Queuing Icmnd Failed. ret = %d\n", 230 ret); 231 } else 232 snic_stats_update_active_ios(&snic->s_stats); 233 234 return ret; 235 } /* end of snic_queue_icmnd_req */ 236 237 /* 238 * snic_issue_scsi_req : Prepares IO request and Issues to FW. 239 */ 240 static int 241 snic_issue_scsi_req(struct snic *snic, 242 struct snic_tgt *tgt, 243 struct scsi_cmnd *sc) 244 { 245 struct snic_req_info *rqi = NULL; 246 int sg_cnt = 0; 247 int ret = 0; 248 u32 tag = snic_cmd_tag(sc); 249 u64 cmd_trc = 0, cmd_st_flags = 0; 250 spinlock_t *io_lock = NULL; 251 unsigned long flags; 252 253 CMD_STATE(sc) = SNIC_IOREQ_NOT_INITED; 254 CMD_FLAGS(sc) = SNIC_NO_FLAGS; 255 sg_cnt = scsi_dma_map(sc); 256 if (sg_cnt < 0) { 257 SNIC_TRC((u16)snic->shost->host_no, tag, (ulong) sc, 0, 258 sc->cmnd[0], sg_cnt, CMD_STATE(sc)); 259 260 SNIC_HOST_ERR(snic->shost, "issue_sc:Failed to map SG List.\n"); 261 ret = -ENOMEM; 262 263 goto issue_sc_end; 264 } 265 266 rqi = snic_req_init(snic, sg_cnt); 267 if (!rqi) { 268 scsi_dma_unmap(sc); 269 ret = -ENOMEM; 270 271 goto issue_sc_end; 272 } 273 274 rqi->tgt_id = tgt->id; 275 rqi->sc = sc; 276 277 CMD_STATE(sc) = SNIC_IOREQ_PENDING; 278 CMD_SP(sc) = (char *) rqi; 279 cmd_trc = SNIC_TRC_CMD(sc); 280 CMD_FLAGS(sc) |= (SNIC_IO_INITIALIZED | SNIC_IO_ISSUED); 281 cmd_st_flags = SNIC_TRC_CMD_STATE_FLAGS(sc); 282 io_lock = snic_io_lock_hash(snic, sc); 283 284 /* create wq desc and enqueue it */ 285 ret = snic_queue_icmnd_req(snic, rqi, sc, sg_cnt); 286 if (ret) { 287 SNIC_HOST_ERR(snic->shost, 288 "issue_sc: icmnd qing Failed for sc %p, err %d\n", 289 sc, ret); 290 291 spin_lock_irqsave(io_lock, flags); 292 rqi = (struct snic_req_info *) CMD_SP(sc); 293 CMD_SP(sc) = NULL; 294 CMD_STATE(sc) = SNIC_IOREQ_COMPLETE; 295 CMD_FLAGS(sc) &= ~SNIC_IO_ISSUED; /* turn off the flag */ 296 spin_unlock_irqrestore(io_lock, flags); 297 298 if (rqi) 299 snic_release_req_buf(snic, rqi, sc); 300 301 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, 0, 0, 0, 302 SNIC_TRC_CMD_STATE_FLAGS(sc)); 303 } else { 304 u32 io_sz = scsi_bufflen(sc) >> 9; 305 u32 qtime = jiffies - rqi->start_time; 306 struct snic_io_stats *iostats = &snic->s_stats.io; 307 308 if (io_sz > atomic64_read(&iostats->max_io_sz)) 309 atomic64_set(&iostats->max_io_sz, io_sz); 310 311 if (qtime > atomic64_read(&iostats->max_qtime)) 312 atomic64_set(&iostats->max_qtime, qtime); 313 314 SNIC_SCSI_DBG(snic->shost, 315 "issue_sc:sc %p, tag %d queued to WQ.\n", 316 sc, tag); 317 318 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, (ulong) rqi, 319 sg_cnt, cmd_trc, cmd_st_flags); 320 } 321 322 issue_sc_end: 323 324 return ret; 325 } /* end of snic_issue_scsi_req */ 326 327 328 /* 329 * snic_queuecommand 330 * Routine to send a scsi cdb to LLD 331 * Called with host_lock held and interrupts disabled 332 */ 333 int 334 snic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) 335 { 336 struct snic_tgt *tgt = NULL; 337 struct snic *snic = shost_priv(shost); 338 int ret; 339 340 tgt = starget_to_tgt(scsi_target(sc->device)); 341 ret = snic_tgt_chkready(tgt); 342 if (ret) { 343 SNIC_HOST_ERR(shost, "Tgt %p id %d Not Ready.\n", tgt, tgt->id); 344 atomic64_inc(&snic->s_stats.misc.tgt_not_rdy); 345 sc->result = ret; 346 sc->scsi_done(sc); 347 348 return 0; 349 } 350 351 if (snic_get_state(snic) != SNIC_ONLINE) { 352 SNIC_HOST_ERR(shost, "snic state is %s\n", 353 snic_state_str[snic_get_state(snic)]); 354 355 return SCSI_MLQUEUE_HOST_BUSY; 356 } 357 atomic_inc(&snic->ios_inflight); 358 359 SNIC_SCSI_DBG(shost, "sc %p Tag %d (sc %0x) lun %lld in snic_qcmd\n", 360 sc, snic_cmd_tag(sc), sc->cmnd[0], sc->device->lun); 361 362 memset(scsi_cmd_priv(sc), 0, sizeof(struct snic_internal_io_state)); 363 364 ret = snic_issue_scsi_req(snic, tgt, sc); 365 if (ret) { 366 SNIC_HOST_ERR(shost, "Failed to Q, Scsi Req w/ err %d.\n", ret); 367 ret = SCSI_MLQUEUE_HOST_BUSY; 368 } 369 370 atomic_dec(&snic->ios_inflight); 371 372 return ret; 373 } /* end of snic_queuecommand */ 374 375 /* 376 * snic_process_abts_pending_state: 377 * caller should hold IO lock 378 */ 379 static void 380 snic_proc_tmreq_pending_state(struct snic *snic, 381 struct scsi_cmnd *sc, 382 u8 cmpl_status) 383 { 384 int state = CMD_STATE(sc); 385 386 if (state == SNIC_IOREQ_ABTS_PENDING) 387 CMD_FLAGS(sc) |= SNIC_IO_ABTS_PENDING; 388 else if (state == SNIC_IOREQ_LR_PENDING) 389 CMD_FLAGS(sc) |= SNIC_DEV_RST_PENDING; 390 else 391 SNIC_BUG_ON(1); 392 393 switch (cmpl_status) { 394 case SNIC_STAT_IO_SUCCESS: 395 CMD_FLAGS(sc) |= SNIC_IO_DONE; 396 break; 397 398 case SNIC_STAT_ABORTED: 399 CMD_FLAGS(sc) |= SNIC_IO_ABORTED; 400 break; 401 402 default: 403 SNIC_BUG_ON(1); 404 } 405 } 406 407 /* 408 * snic_process_io_failed_state: 409 * Processes IO's error states 410 */ 411 static void 412 snic_process_io_failed_state(struct snic *snic, 413 struct snic_icmnd_cmpl *icmnd_cmpl, 414 struct scsi_cmnd *sc, 415 u8 cmpl_stat) 416 { 417 int res = 0; 418 419 switch (cmpl_stat) { 420 case SNIC_STAT_TIMEOUT: /* Req was timedout */ 421 atomic64_inc(&snic->s_stats.misc.io_tmo); 422 res = DID_TIME_OUT; 423 break; 424 425 case SNIC_STAT_ABORTED: /* Req was aborted */ 426 atomic64_inc(&snic->s_stats.misc.io_aborted); 427 res = DID_ABORT; 428 break; 429 430 case SNIC_STAT_DATA_CNT_MISMATCH:/* Recv/Sent more/less data than exp */ 431 atomic64_inc(&snic->s_stats.misc.data_cnt_mismat); 432 scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid)); 433 res = DID_ERROR; 434 break; 435 436 case SNIC_STAT_OUT_OF_RES: /* Out of resources to complete request */ 437 atomic64_inc(&snic->s_stats.fw.out_of_res); 438 res = DID_REQUEUE; 439 break; 440 441 case SNIC_STAT_IO_NOT_FOUND: /* Requested I/O was not found */ 442 atomic64_inc(&snic->s_stats.io.io_not_found); 443 res = DID_ERROR; 444 break; 445 446 case SNIC_STAT_SGL_INVALID: /* Req was aborted to due to sgl error*/ 447 atomic64_inc(&snic->s_stats.misc.sgl_inval); 448 res = DID_ERROR; 449 break; 450 451 case SNIC_STAT_FW_ERR: /* Req terminated due to FW Error */ 452 atomic64_inc(&snic->s_stats.fw.io_errs); 453 res = DID_ERROR; 454 break; 455 456 case SNIC_STAT_SCSI_ERR: /* FW hits SCSI Error */ 457 atomic64_inc(&snic->s_stats.fw.scsi_errs); 458 break; 459 460 case SNIC_STAT_NOT_READY: /* XPT yet to initialize */ 461 case SNIC_STAT_DEV_OFFLINE: /* Device offline */ 462 res = DID_NO_CONNECT; 463 break; 464 465 case SNIC_STAT_INVALID_HDR: /* Hdr contains invalid data */ 466 case SNIC_STAT_INVALID_PARM: /* Some param in req is invalid */ 467 case SNIC_STAT_REQ_NOT_SUP: /* Req type is not supported */ 468 case SNIC_STAT_CMND_REJECT: /* Req rejected */ 469 case SNIC_STAT_FATAL_ERROR: /* XPT Error */ 470 default: 471 SNIC_SCSI_DBG(snic->shost, 472 "Invalid Hdr/Param or Req Not Supported or Cmnd Rejected or Device Offline. or Unknown\n"); 473 res = DID_ERROR; 474 break; 475 } 476 477 SNIC_HOST_ERR(snic->shost, "fw returns failed status %s flags 0x%llx\n", 478 snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc)); 479 480 /* Set sc->result */ 481 sc->result = (res << 16) | icmnd_cmpl->scsi_status; 482 } /* end of snic_process_io_failed_state */ 483 484 /* 485 * snic_tmreq_pending : is task management in progress. 486 */ 487 static int 488 snic_tmreq_pending(struct scsi_cmnd *sc) 489 { 490 int state = CMD_STATE(sc); 491 492 return ((state == SNIC_IOREQ_ABTS_PENDING) || 493 (state == SNIC_IOREQ_LR_PENDING)); 494 } 495 496 /* 497 * snic_process_icmnd_cmpl_status: 498 * Caller should hold io_lock 499 */ 500 static int 501 snic_process_icmnd_cmpl_status(struct snic *snic, 502 struct snic_icmnd_cmpl *icmnd_cmpl, 503 u8 cmpl_stat, 504 struct scsi_cmnd *sc) 505 { 506 u8 scsi_stat = icmnd_cmpl->scsi_status; 507 u64 xfer_len = 0; 508 int ret = 0; 509 510 /* Mark the IO as complete */ 511 CMD_STATE(sc) = SNIC_IOREQ_COMPLETE; 512 513 if (likely(cmpl_stat == SNIC_STAT_IO_SUCCESS)) { 514 sc->result = (DID_OK << 16) | scsi_stat; 515 516 xfer_len = scsi_bufflen(sc); 517 518 /* Update SCSI Cmd with resid value */ 519 scsi_set_resid(sc, le32_to_cpu(icmnd_cmpl->resid)); 520 521 if (icmnd_cmpl->flags & SNIC_ICMND_CMPL_UNDR_RUN) { 522 xfer_len -= le32_to_cpu(icmnd_cmpl->resid); 523 atomic64_inc(&snic->s_stats.misc.io_under_run); 524 } 525 526 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 527 atomic64_inc(&snic->s_stats.misc.qfull); 528 529 ret = 0; 530 } else { 531 snic_process_io_failed_state(snic, icmnd_cmpl, sc, cmpl_stat); 532 atomic64_inc(&snic->s_stats.io.fail); 533 SNIC_HOST_ERR(snic->shost, 534 "icmnd_cmpl: IO Failed : Hdr Status %s flags 0x%llx\n", 535 snic_io_status_to_str(cmpl_stat), CMD_FLAGS(sc)); 536 ret = 1; 537 } 538 539 return ret; 540 } /* end of snic_process_icmnd_cmpl_status */ 541 542 543 /* 544 * snic_icmnd_cmpl_handler 545 * Routine to handle icmnd completions 546 */ 547 static void 548 snic_icmnd_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq) 549 { 550 u8 typ, hdr_stat; 551 u32 cmnd_id, hid; 552 ulong ctx; 553 struct scsi_cmnd *sc = NULL; 554 struct snic_icmnd_cmpl *icmnd_cmpl = NULL; 555 struct snic_host_req *req = NULL; 556 struct snic_req_info *rqi = NULL; 557 unsigned long flags, start_time; 558 spinlock_t *io_lock; 559 u8 sc_stat = 0; 560 561 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx); 562 icmnd_cmpl = &fwreq->u.icmnd_cmpl; 563 sc_stat = icmnd_cmpl->scsi_status; 564 565 SNIC_SCSI_DBG(snic->shost, 566 "Icmnd_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,i ctx = %lx\n", 567 typ, hdr_stat, cmnd_id, hid, ctx); 568 569 if (cmnd_id >= snic->max_tag_id) { 570 SNIC_HOST_ERR(snic->shost, 571 "Icmnd_cmpl:Tag Error:Out of Range Tag %d, hdr status = %s\n", 572 cmnd_id, snic_io_status_to_str(hdr_stat)); 573 return; 574 } 575 576 sc = scsi_host_find_tag(snic->shost, cmnd_id); 577 WARN_ON_ONCE(!sc); 578 579 if (!sc) { 580 atomic64_inc(&snic->s_stats.io.sc_null); 581 SNIC_HOST_ERR(snic->shost, 582 "Icmnd_cmpl: Scsi Cmnd Not found, sc = NULL Hdr Status = %s tag = 0x%x fwreq = 0x%p\n", 583 snic_io_status_to_str(hdr_stat), 584 cmnd_id, 585 fwreq); 586 587 SNIC_TRC(snic->shost->host_no, cmnd_id, 0, 588 ((u64)hdr_stat << 16 | 589 (u64)sc_stat << 8 | (u64)icmnd_cmpl->flags), 590 (ulong) fwreq, le32_to_cpu(icmnd_cmpl->resid), ctx); 591 592 return; 593 } 594 595 io_lock = snic_io_lock_hash(snic, sc); 596 597 spin_lock_irqsave(io_lock, flags); 598 rqi = (struct snic_req_info *) CMD_SP(sc); 599 SNIC_SCSI_DBG(snic->shost, 600 "Icmnd_cmpl:lun %lld sc %p cmd %xtag %d flags 0x%llx rqi %p\n", 601 sc->device->lun, sc, sc->cmnd[0], snic_cmd_tag(sc), 602 CMD_FLAGS(sc), rqi); 603 604 SNIC_BUG_ON(rqi != (struct snic_req_info *)ctx); 605 WARN_ON_ONCE(req); 606 if (!rqi) { 607 atomic64_inc(&snic->s_stats.io.req_null); 608 CMD_FLAGS(sc) |= SNIC_IO_REQ_NULL; 609 spin_unlock_irqrestore(io_lock, flags); 610 611 SNIC_HOST_ERR(snic->shost, 612 "Icmnd_cmpl:Host Req Not Found(null), Hdr Status %s, Tag 0x%x, sc 0x%p flags 0x%llx\n", 613 snic_io_status_to_str(hdr_stat), 614 cmnd_id, sc, CMD_FLAGS(sc)); 615 return; 616 } 617 618 rqi = (struct snic_req_info *) ctx; 619 start_time = rqi->start_time; 620 621 /* firmware completed the io */ 622 rqi->io_cmpl = 1; 623 624 /* 625 * if SCSI-ML has already issued abort on this command, 626 * ignore completion of the IO. The abts path will clean it up 627 */ 628 if (unlikely(snic_tmreq_pending(sc))) { 629 snic_proc_tmreq_pending_state(snic, sc, hdr_stat); 630 spin_unlock_irqrestore(io_lock, flags); 631 632 snic_stats_update_io_cmpl(&snic->s_stats); 633 634 /* Expected value is SNIC_STAT_ABORTED */ 635 if (likely(hdr_stat == SNIC_STAT_ABORTED)) 636 return; 637 638 SNIC_SCSI_DBG(snic->shost, 639 "icmnd_cmpl:TM Req Pending(%s), Hdr Status %s sc 0x%p scsi status %x resid %d flags 0x%llx\n", 640 snic_ioreq_state_to_str(CMD_STATE(sc)), 641 snic_io_status_to_str(hdr_stat), 642 sc, sc_stat, le32_to_cpu(icmnd_cmpl->resid), 643 CMD_FLAGS(sc)); 644 645 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc, 646 jiffies_to_msecs(jiffies - start_time), (ulong) fwreq, 647 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc)); 648 649 return; 650 } 651 652 if (snic_process_icmnd_cmpl_status(snic, icmnd_cmpl, hdr_stat, sc)) { 653 scsi_print_command(sc); 654 SNIC_HOST_ERR(snic->shost, 655 "icmnd_cmpl:IO Failed, sc 0x%p Tag %d Cmd %x Hdr Status %s flags 0x%llx\n", 656 sc, sc->cmnd[0], cmnd_id, 657 snic_io_status_to_str(hdr_stat), CMD_FLAGS(sc)); 658 } 659 660 /* Break link with the SCSI Command */ 661 CMD_SP(sc) = NULL; 662 CMD_FLAGS(sc) |= SNIC_IO_DONE; 663 664 spin_unlock_irqrestore(io_lock, flags); 665 666 /* For now, consider only successful IO. */ 667 snic_calc_io_process_time(snic, rqi); 668 669 snic_release_req_buf(snic, rqi, sc); 670 671 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc, 672 jiffies_to_msecs(jiffies - start_time), (ulong) fwreq, 673 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc)); 674 675 676 if (sc->scsi_done) 677 sc->scsi_done(sc); 678 679 snic_stats_update_io_cmpl(&snic->s_stats); 680 } /* end of snic_icmnd_cmpl_handler */ 681 682 static void 683 snic_proc_dr_cmpl_locked(struct snic *snic, 684 struct snic_fw_req *fwreq, 685 u8 cmpl_stat, 686 u32 cmnd_id, 687 struct scsi_cmnd *sc) 688 { 689 struct snic_req_info *rqi = (struct snic_req_info *) CMD_SP(sc); 690 u32 start_time = rqi->start_time; 691 692 CMD_LR_STATUS(sc) = cmpl_stat; 693 694 SNIC_SCSI_DBG(snic->shost, "itmf_cmpl: Cmd State = %s\n", 695 snic_ioreq_state_to_str(CMD_STATE(sc))); 696 697 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) { 698 CMD_FLAGS(sc) |= SNIC_DEV_RST_ABTS_PENDING; 699 700 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc, 701 jiffies_to_msecs(jiffies - start_time), 702 (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc)); 703 704 SNIC_SCSI_DBG(snic->shost, 705 "itmf_cmpl: Terminate Pending Dev Reset Cmpl Recvd.id %x, status %s flags 0x%llx\n", 706 (int)(cmnd_id & SNIC_TAG_MASK), 707 snic_io_status_to_str(cmpl_stat), 708 CMD_FLAGS(sc)); 709 710 return; 711 } 712 713 714 if (CMD_FLAGS(sc) & SNIC_DEV_RST_TIMEDOUT) { 715 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc, 716 jiffies_to_msecs(jiffies - start_time), 717 (ulong) fwreq, 0, SNIC_TRC_CMD_STATE_FLAGS(sc)); 718 719 SNIC_SCSI_DBG(snic->shost, 720 "itmf_cmpl:Dev Reset Completion Received after timeout. id %d cmpl status %s flags 0x%llx\n", 721 (int)(cmnd_id & SNIC_TAG_MASK), 722 snic_io_status_to_str(cmpl_stat), 723 CMD_FLAGS(sc)); 724 725 return; 726 } 727 728 CMD_STATE(sc) = SNIC_IOREQ_LR_COMPLETE; 729 CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE; 730 731 SNIC_SCSI_DBG(snic->shost, 732 "itmf_cmpl:Dev Reset Cmpl Recvd id %d cmpl status %s flags 0x%llx\n", 733 (int)(cmnd_id & SNIC_TAG_MASK), 734 snic_io_status_to_str(cmpl_stat), 735 CMD_FLAGS(sc)); 736 737 if (rqi->dr_done) 738 complete(rqi->dr_done); 739 } /* end of snic_proc_dr_cmpl_locked */ 740 741 /* 742 * snic_update_abort_stats : Updates abort stats based on completion status. 743 */ 744 static void 745 snic_update_abort_stats(struct snic *snic, u8 cmpl_stat) 746 { 747 struct snic_abort_stats *abt_stats = &snic->s_stats.abts; 748 749 SNIC_SCSI_DBG(snic->shost, "Updating Abort stats.\n"); 750 751 switch (cmpl_stat) { 752 case SNIC_STAT_IO_SUCCESS: 753 break; 754 755 case SNIC_STAT_TIMEOUT: 756 atomic64_inc(&abt_stats->fw_tmo); 757 break; 758 759 case SNIC_STAT_IO_NOT_FOUND: 760 atomic64_inc(&abt_stats->io_not_found); 761 break; 762 763 default: 764 atomic64_inc(&abt_stats->fail); 765 break; 766 } 767 } 768 769 static int 770 snic_process_itmf_cmpl(struct snic *snic, 771 struct snic_fw_req *fwreq, 772 u32 cmnd_id, 773 u8 cmpl_stat, 774 struct scsi_cmnd *sc) 775 { 776 struct snic_req_info *rqi = NULL; 777 u32 tm_tags = 0; 778 spinlock_t *io_lock = NULL; 779 unsigned long flags; 780 u32 start_time = 0; 781 int ret = 0; 782 783 io_lock = snic_io_lock_hash(snic, sc); 784 spin_lock_irqsave(io_lock, flags); 785 rqi = (struct snic_req_info *) CMD_SP(sc); 786 WARN_ON_ONCE(!rqi); 787 788 if (!rqi) { 789 atomic64_inc(&snic->s_stats.io.req_null); 790 spin_unlock_irqrestore(io_lock, flags); 791 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL; 792 SNIC_HOST_ERR(snic->shost, 793 "itmf_cmpl: rqi is null,Hdr stat = %s Tag = 0x%x sc = 0x%p flags 0x%llx\n", 794 snic_io_status_to_str(cmpl_stat), cmnd_id, sc, 795 CMD_FLAGS(sc)); 796 797 return ret; 798 } 799 800 /* Extract task management flags */ 801 tm_tags = cmnd_id & ~(SNIC_TAG_MASK); 802 803 start_time = rqi->start_time; 804 cmnd_id &= (SNIC_TAG_MASK); 805 806 switch (tm_tags) { 807 case SNIC_TAG_ABORT: 808 /* Abort only issued on cmd */ 809 snic_update_abort_stats(snic, cmpl_stat); 810 811 if (CMD_STATE(sc) != SNIC_IOREQ_ABTS_PENDING) { 812 /* This is a late completion. Ignore it. */ 813 ret = -1; 814 spin_unlock_irqrestore(io_lock, flags); 815 break; 816 } 817 818 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE; 819 CMD_ABTS_STATUS(sc) = cmpl_stat; 820 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE; 821 822 SNIC_SCSI_DBG(snic->shost, 823 "itmf_cmpl:Abort Cmpl Recvd.Tag 0x%x Status %s flags 0x%llx\n", 824 cmnd_id, 825 snic_io_status_to_str(cmpl_stat), 826 CMD_FLAGS(sc)); 827 828 /* 829 * If scsi_eh thread is blocked waiting for abts complete, 830 * signal completion to it. IO will be cleaned in the thread, 831 * else clean it in this context. 832 */ 833 if (rqi->abts_done) { 834 complete(rqi->abts_done); 835 spin_unlock_irqrestore(io_lock, flags); 836 837 break; /* jump out */ 838 } 839 840 CMD_SP(sc) = NULL; 841 sc->result = (DID_ERROR << 16); 842 SNIC_SCSI_DBG(snic->shost, 843 "itmf_cmpl: Completing IO. sc %p flags 0x%llx\n", 844 sc, CMD_FLAGS(sc)); 845 846 spin_unlock_irqrestore(io_lock, flags); 847 848 snic_release_req_buf(snic, rqi, sc); 849 850 if (sc->scsi_done) { 851 SNIC_TRC(snic->shost->host_no, cmnd_id, (ulong) sc, 852 jiffies_to_msecs(jiffies - start_time), 853 (ulong) fwreq, SNIC_TRC_CMD(sc), 854 SNIC_TRC_CMD_STATE_FLAGS(sc)); 855 856 sc->scsi_done(sc); 857 } 858 859 break; 860 861 case SNIC_TAG_DEV_RST: 862 case SNIC_TAG_DEV_RST | SNIC_TAG_IOCTL_DEV_RST: 863 snic_proc_dr_cmpl_locked(snic, fwreq, cmpl_stat, cmnd_id, sc); 864 spin_unlock_irqrestore(io_lock, flags); 865 ret = 0; 866 867 break; 868 869 case SNIC_TAG_ABORT | SNIC_TAG_DEV_RST: 870 /* Abort and terminate completion of device reset req */ 871 872 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE; 873 CMD_ABTS_STATUS(sc) = cmpl_stat; 874 CMD_FLAGS(sc) |= SNIC_DEV_RST_DONE; 875 876 SNIC_SCSI_DBG(snic->shost, 877 "itmf_cmpl:dev reset abts cmpl recvd. id %d status %s flags 0x%llx\n", 878 cmnd_id, snic_io_status_to_str(cmpl_stat), 879 CMD_FLAGS(sc)); 880 881 if (rqi->abts_done) 882 complete(rqi->abts_done); 883 884 spin_unlock_irqrestore(io_lock, flags); 885 886 break; 887 888 default: 889 spin_unlock_irqrestore(io_lock, flags); 890 SNIC_HOST_ERR(snic->shost, 891 "itmf_cmpl: Unknown TM tag bit 0x%x\n", tm_tags); 892 893 SNIC_HOST_ERR(snic->shost, 894 "itmf_cmpl:Unexpected itmf io stat %s Tag = 0x%x flags 0x%llx\n", 895 snic_ioreq_state_to_str(CMD_STATE(sc)), 896 cmnd_id, 897 CMD_FLAGS(sc)); 898 ret = -1; 899 SNIC_BUG_ON(1); 900 901 break; 902 } 903 904 return ret; 905 } /* end of snic_process_itmf_cmpl_status */ 906 907 /* 908 * snic_itmf_cmpl_handler. 909 * Routine to handle itmf completions. 910 */ 911 static void 912 snic_itmf_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq) 913 { 914 struct scsi_cmnd *sc = NULL; 915 struct snic_req_info *rqi = NULL; 916 struct snic_itmf_cmpl *itmf_cmpl = NULL; 917 ulong ctx; 918 u32 cmnd_id; 919 u32 hid; 920 u8 typ; 921 u8 hdr_stat; 922 923 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx); 924 SNIC_SCSI_DBG(snic->shost, 925 "Itmf_cmpl: %s: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x,ctx = %lx\n", 926 __func__, typ, hdr_stat, cmnd_id, hid, ctx); 927 928 itmf_cmpl = &fwreq->u.itmf_cmpl; 929 SNIC_SCSI_DBG(snic->shost, 930 "Itmf_cmpl: nterm %u , flags 0x%x\n", 931 le32_to_cpu(itmf_cmpl->nterminated), itmf_cmpl->flags); 932 933 /* spl case, dev reset issued through ioctl */ 934 if (cmnd_id & SNIC_TAG_IOCTL_DEV_RST) { 935 rqi = (struct snic_req_info *) ctx; 936 sc = rqi->sc; 937 938 goto ioctl_dev_rst; 939 } 940 941 if ((cmnd_id & SNIC_TAG_MASK) >= snic->max_tag_id) { 942 SNIC_HOST_ERR(snic->shost, 943 "Itmf_cmpl: Tag 0x%x out of Range,HdrStat %s\n", 944 cmnd_id, snic_io_status_to_str(hdr_stat)); 945 SNIC_BUG_ON(1); 946 947 return; 948 } 949 950 sc = scsi_host_find_tag(snic->shost, cmnd_id & SNIC_TAG_MASK); 951 WARN_ON_ONCE(!sc); 952 953 ioctl_dev_rst: 954 if (!sc) { 955 atomic64_inc(&snic->s_stats.io.sc_null); 956 SNIC_HOST_ERR(snic->shost, 957 "Itmf_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n", 958 snic_io_status_to_str(hdr_stat), cmnd_id); 959 960 return; 961 } 962 963 snic_process_itmf_cmpl(snic, fwreq, cmnd_id, hdr_stat, sc); 964 } /* end of snic_itmf_cmpl_handler */ 965 966 967 968 static void 969 snic_hba_reset_scsi_cleanup(struct snic *snic, struct scsi_cmnd *sc) 970 { 971 struct snic_stats *st = &snic->s_stats; 972 long act_ios = 0, act_fwreqs = 0; 973 974 SNIC_SCSI_DBG(snic->shost, "HBA Reset scsi cleanup.\n"); 975 snic_scsi_cleanup(snic, snic_cmd_tag(sc)); 976 977 /* Update stats on pending IOs */ 978 act_ios = atomic64_read(&st->io.active); 979 atomic64_add(act_ios, &st->io.compl); 980 atomic64_sub(act_ios, &st->io.active); 981 982 act_fwreqs = atomic64_read(&st->fw.actv_reqs); 983 atomic64_sub(act_fwreqs, &st->fw.actv_reqs); 984 } 985 986 /* 987 * snic_hba_reset_cmpl_handler : 988 * 989 * Notes : 990 * 1. Cleanup all the scsi cmds, release all snic specific cmds 991 * 2. Issue Report Targets in case of SAN targets 992 */ 993 static int 994 snic_hba_reset_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq) 995 { 996 ulong ctx; 997 u32 cmnd_id; 998 u32 hid; 999 u8 typ; 1000 u8 hdr_stat; 1001 struct scsi_cmnd *sc = NULL; 1002 struct snic_req_info *rqi = NULL; 1003 spinlock_t *io_lock = NULL; 1004 unsigned long flags, gflags; 1005 int ret = 0; 1006 1007 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx); 1008 SNIC_HOST_INFO(snic->shost, 1009 "reset_cmpl:Tag %d ctx %lx cmpl status %s HBA Reset Completion received.\n", 1010 cmnd_id, ctx, snic_io_status_to_str(hdr_stat)); 1011 1012 SNIC_SCSI_DBG(snic->shost, 1013 "reset_cmpl: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n", 1014 typ, hdr_stat, cmnd_id, hid, ctx); 1015 1016 /* spl case, host reset issued through ioctl */ 1017 if (cmnd_id == SCSI_NO_TAG) { 1018 rqi = (struct snic_req_info *) ctx; 1019 SNIC_HOST_INFO(snic->shost, 1020 "reset_cmpl:Tag %d ctx %lx cmpl stat %s\n", 1021 cmnd_id, ctx, snic_io_status_to_str(hdr_stat)); 1022 sc = rqi->sc; 1023 1024 goto ioctl_hba_rst; 1025 } 1026 1027 if (cmnd_id >= snic->max_tag_id) { 1028 SNIC_HOST_ERR(snic->shost, 1029 "reset_cmpl: Tag 0x%x out of Range,HdrStat %s\n", 1030 cmnd_id, snic_io_status_to_str(hdr_stat)); 1031 SNIC_BUG_ON(1); 1032 1033 return 1; 1034 } 1035 1036 sc = scsi_host_find_tag(snic->shost, cmnd_id); 1037 ioctl_hba_rst: 1038 if (!sc) { 1039 atomic64_inc(&snic->s_stats.io.sc_null); 1040 SNIC_HOST_ERR(snic->shost, 1041 "reset_cmpl: sc is NULL - Hdr Stat %s Tag 0x%x\n", 1042 snic_io_status_to_str(hdr_stat), cmnd_id); 1043 ret = 1; 1044 1045 return ret; 1046 } 1047 1048 SNIC_HOST_INFO(snic->shost, 1049 "reset_cmpl: sc %p rqi %p Tag %d flags 0x%llx\n", 1050 sc, rqi, cmnd_id, CMD_FLAGS(sc)); 1051 1052 io_lock = snic_io_lock_hash(snic, sc); 1053 spin_lock_irqsave(io_lock, flags); 1054 1055 if (!snic->remove_wait) { 1056 spin_unlock_irqrestore(io_lock, flags); 1057 SNIC_HOST_ERR(snic->shost, 1058 "reset_cmpl:host reset completed after timout\n"); 1059 ret = 1; 1060 1061 return ret; 1062 } 1063 1064 rqi = (struct snic_req_info *) CMD_SP(sc); 1065 WARN_ON_ONCE(!rqi); 1066 1067 if (!rqi) { 1068 atomic64_inc(&snic->s_stats.io.req_null); 1069 spin_unlock_irqrestore(io_lock, flags); 1070 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL; 1071 SNIC_HOST_ERR(snic->shost, 1072 "reset_cmpl: rqi is null,Hdr stat %s Tag 0x%x sc 0x%p flags 0x%llx\n", 1073 snic_io_status_to_str(hdr_stat), cmnd_id, sc, 1074 CMD_FLAGS(sc)); 1075 1076 ret = 1; 1077 1078 return ret; 1079 } 1080 /* stats */ 1081 spin_unlock_irqrestore(io_lock, flags); 1082 1083 /* scsi cleanup */ 1084 snic_hba_reset_scsi_cleanup(snic, sc); 1085 1086 SNIC_BUG_ON(snic_get_state(snic) != SNIC_OFFLINE && 1087 snic_get_state(snic) != SNIC_FWRESET); 1088 1089 /* Careful locking between snic_lock and io lock */ 1090 spin_lock_irqsave(io_lock, flags); 1091 spin_lock_irqsave(&snic->snic_lock, gflags); 1092 if (snic_get_state(snic) == SNIC_FWRESET) 1093 snic_set_state(snic, SNIC_ONLINE); 1094 spin_unlock_irqrestore(&snic->snic_lock, gflags); 1095 1096 if (snic->remove_wait) 1097 complete(snic->remove_wait); 1098 1099 spin_unlock_irqrestore(io_lock, flags); 1100 atomic64_inc(&snic->s_stats.reset.hba_reset_cmpl); 1101 1102 ret = 0; 1103 /* Rediscovery is for SAN */ 1104 if (snic->config.xpt_type == SNIC_DAS) 1105 return ret; 1106 1107 SNIC_SCSI_DBG(snic->shost, "reset_cmpl: Queuing discovery work.\n"); 1108 queue_work(snic_glob->event_q, &snic->disc_work); 1109 1110 return ret; 1111 } 1112 1113 static void 1114 snic_msg_ack_handler(struct snic *snic, struct snic_fw_req *fwreq) 1115 { 1116 SNIC_HOST_INFO(snic->shost, "Message Ack Received.\n"); 1117 1118 SNIC_ASSERT_NOT_IMPL(1); 1119 } 1120 1121 static void 1122 snic_aen_handler(struct snic *snic, struct snic_fw_req *fwreq) 1123 { 1124 u8 typ, hdr_stat; 1125 u32 cmnd_id, hid; 1126 ulong ctx; 1127 struct snic_async_evnotify *aen = &fwreq->u.async_ev; 1128 u32 event_id = 0; 1129 1130 snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx); 1131 SNIC_SCSI_DBG(snic->shost, 1132 "aen: type = %x, hdr_stat = %x, cmnd_id = %x, hid = %x, ctx = %lx\n", 1133 typ, hdr_stat, cmnd_id, hid, ctx); 1134 1135 event_id = le32_to_cpu(aen->ev_id); 1136 1137 switch (event_id) { 1138 case SNIC_EV_TGT_OFFLINE: 1139 SNIC_HOST_INFO(snic->shost, "aen:TGT_OFFLINE Event Recvd.\n"); 1140 break; 1141 1142 case SNIC_EV_TGT_ONLINE: 1143 SNIC_HOST_INFO(snic->shost, "aen:TGT_ONLINE Event Recvd.\n"); 1144 break; 1145 1146 case SNIC_EV_LUN_OFFLINE: 1147 SNIC_HOST_INFO(snic->shost, "aen:LUN_OFFLINE Event Recvd.\n"); 1148 break; 1149 1150 case SNIC_EV_LUN_ONLINE: 1151 SNIC_HOST_INFO(snic->shost, "aen:LUN_ONLINE Event Recvd.\n"); 1152 break; 1153 1154 case SNIC_EV_CONF_CHG: 1155 SNIC_HOST_INFO(snic->shost, "aen:Config Change Event Recvd.\n"); 1156 break; 1157 1158 case SNIC_EV_TGT_ADDED: 1159 SNIC_HOST_INFO(snic->shost, "aen:TGT_ADD Event Recvd.\n"); 1160 break; 1161 1162 case SNIC_EV_TGT_DELTD: 1163 SNIC_HOST_INFO(snic->shost, "aen:TGT_DEL Event Recvd.\n"); 1164 break; 1165 1166 case SNIC_EV_LUN_ADDED: 1167 SNIC_HOST_INFO(snic->shost, "aen:LUN_ADD Event Recvd.\n"); 1168 break; 1169 1170 case SNIC_EV_LUN_DELTD: 1171 SNIC_HOST_INFO(snic->shost, "aen:LUN_DEL Event Recvd.\n"); 1172 break; 1173 1174 case SNIC_EV_DISC_CMPL: 1175 SNIC_HOST_INFO(snic->shost, "aen:DISC_CMPL Event Recvd.\n"); 1176 break; 1177 1178 default: 1179 SNIC_HOST_INFO(snic->shost, "aen:Unknown Event Recvd.\n"); 1180 SNIC_BUG_ON(1); 1181 break; 1182 } 1183 1184 SNIC_ASSERT_NOT_IMPL(1); 1185 } /* end of snic_aen_handler */ 1186 1187 /* 1188 * snic_io_cmpl_handler 1189 * Routine to process CQ entries(IO Completions) posted by fw. 1190 */ 1191 static int 1192 snic_io_cmpl_handler(struct vnic_dev *vdev, 1193 unsigned int cq_idx, 1194 struct snic_fw_req *fwreq) 1195 { 1196 struct snic *snic = svnic_dev_priv(vdev); 1197 u64 start = jiffies, cmpl_time; 1198 1199 snic_print_desc(__func__, (char *)fwreq, sizeof(*fwreq)); 1200 1201 /* Update FW Stats */ 1202 if ((fwreq->hdr.type >= SNIC_RSP_REPORT_TGTS_CMPL) && 1203 (fwreq->hdr.type <= SNIC_RSP_BOOT_LUNS_CMPL)) 1204 atomic64_dec(&snic->s_stats.fw.actv_reqs); 1205 1206 SNIC_BUG_ON((fwreq->hdr.type > SNIC_RSP_BOOT_LUNS_CMPL) && 1207 (fwreq->hdr.type < SNIC_MSG_ASYNC_EVNOTIFY)); 1208 1209 /* Check for snic subsys errors */ 1210 switch (fwreq->hdr.status) { 1211 case SNIC_STAT_NOT_READY: /* XPT yet to initialize */ 1212 SNIC_HOST_ERR(snic->shost, 1213 "sNIC SubSystem is NOT Ready.\n"); 1214 break; 1215 1216 case SNIC_STAT_FATAL_ERROR: /* XPT Error */ 1217 SNIC_HOST_ERR(snic->shost, 1218 "sNIC SubSystem in Unrecoverable State.\n"); 1219 break; 1220 } 1221 1222 switch (fwreq->hdr.type) { 1223 case SNIC_RSP_EXCH_VER_CMPL: 1224 snic_io_exch_ver_cmpl_handler(snic, fwreq); 1225 break; 1226 1227 case SNIC_RSP_REPORT_TGTS_CMPL: 1228 snic_report_tgt_cmpl_handler(snic, fwreq); 1229 break; 1230 1231 case SNIC_RSP_ICMND_CMPL: 1232 snic_icmnd_cmpl_handler(snic, fwreq); 1233 break; 1234 1235 case SNIC_RSP_ITMF_CMPL: 1236 snic_itmf_cmpl_handler(snic, fwreq); 1237 break; 1238 1239 case SNIC_RSP_HBA_RESET_CMPL: 1240 snic_hba_reset_cmpl_handler(snic, fwreq); 1241 break; 1242 1243 case SNIC_MSG_ACK: 1244 snic_msg_ack_handler(snic, fwreq); 1245 break; 1246 1247 case SNIC_MSG_ASYNC_EVNOTIFY: 1248 snic_aen_handler(snic, fwreq); 1249 break; 1250 1251 default: 1252 SNIC_BUG_ON(1); 1253 SNIC_SCSI_DBG(snic->shost, 1254 "Unknown Firmwqre completion request type %d\n", 1255 fwreq->hdr.type); 1256 break; 1257 } 1258 1259 /* Update Stats */ 1260 cmpl_time = jiffies - start; 1261 if (cmpl_time > atomic64_read(&snic->s_stats.io.max_cmpl_time)) 1262 atomic64_set(&snic->s_stats.io.max_cmpl_time, cmpl_time); 1263 1264 return 0; 1265 } /* end of snic_io_cmpl_handler */ 1266 1267 /* 1268 * snic_fwcq_cmpl_handler 1269 * Routine to process fwCQ 1270 * This CQ is independent, and not associated with wq/rq/wq_copy queues 1271 */ 1272 int 1273 snic_fwcq_cmpl_handler(struct snic *snic, int io_cmpl_work) 1274 { 1275 unsigned int num_ent = 0; /* number cq entries processed */ 1276 unsigned int cq_idx; 1277 unsigned int nent_per_cq; 1278 struct snic_misc_stats *misc_stats = &snic->s_stats.misc; 1279 1280 for (cq_idx = snic->wq_count; cq_idx < snic->cq_count; cq_idx++) { 1281 nent_per_cq = vnic_cq_fw_service(&snic->cq[cq_idx], 1282 snic_io_cmpl_handler, 1283 io_cmpl_work); 1284 num_ent += nent_per_cq; 1285 1286 if (nent_per_cq > atomic64_read(&misc_stats->max_cq_ents)) 1287 atomic64_set(&misc_stats->max_cq_ents, nent_per_cq); 1288 } 1289 1290 return num_ent; 1291 } /* end of snic_fwcq_cmpl_handler */ 1292 1293 /* 1294 * snic_queue_itmf_req: Common API to queue Task Management requests. 1295 * Use rqi->tm_tag for passing special tags. 1296 * @req_id : aborted request's tag, -1 for lun reset. 1297 */ 1298 static int 1299 snic_queue_itmf_req(struct snic *snic, 1300 struct snic_host_req *tmreq, 1301 struct scsi_cmnd *sc, 1302 u32 tmf, 1303 u32 req_id) 1304 { 1305 struct snic_req_info *rqi = req_to_rqi(tmreq); 1306 struct scsi_lun lun; 1307 int tm_tag = snic_cmd_tag(sc) | rqi->tm_tag; 1308 int ret = 0; 1309 1310 SNIC_BUG_ON(!rqi); 1311 SNIC_BUG_ON(!rqi->tm_tag); 1312 1313 /* fill in lun info */ 1314 int_to_scsilun(sc->device->lun, &lun); 1315 1316 /* Initialize snic_host_req: itmf */ 1317 snic_itmf_init(tmreq, 1318 tm_tag, 1319 snic->config.hid, 1320 (ulong) rqi, 1321 0 /* flags */, 1322 req_id, /* Command to be aborted. */ 1323 rqi->tgt_id, 1324 lun.scsi_lun, 1325 tmf); 1326 1327 /* 1328 * In case of multiple aborts on same cmd, 1329 * use try_wait_for_completion and completion_done() to check 1330 * whether it queues aborts even after completion of abort issued 1331 * prior.SNIC_BUG_ON(completion_done(&rqi->done)); 1332 */ 1333 1334 ret = snic_queue_wq_desc(snic, tmreq, sizeof(*tmreq)); 1335 if (ret) 1336 SNIC_HOST_ERR(snic->shost, 1337 "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d tag %d Failed, ret = %d\n", 1338 tmf, sc, rqi, req_id, snic_cmd_tag(sc), ret); 1339 else 1340 SNIC_SCSI_DBG(snic->shost, 1341 "qitmf:Queuing ITMF(%d) Req sc %p, rqi %p, req_id %d, tag %d (req_id)- Success.", 1342 tmf, sc, rqi, req_id, snic_cmd_tag(sc)); 1343 1344 return ret; 1345 } /* end of snic_queue_itmf_req */ 1346 1347 static int 1348 snic_issue_tm_req(struct snic *snic, 1349 struct snic_req_info *rqi, 1350 struct scsi_cmnd *sc, 1351 int tmf) 1352 { 1353 struct snic_host_req *tmreq = NULL; 1354 int req_id = 0, tag = snic_cmd_tag(sc); 1355 int ret = 0; 1356 1357 if (snic_get_state(snic) == SNIC_FWRESET) 1358 return -EBUSY; 1359 1360 atomic_inc(&snic->ios_inflight); 1361 1362 SNIC_SCSI_DBG(snic->shost, 1363 "issu_tmreq: Task mgmt req %d. rqi %p w/ tag %x\n", 1364 tmf, rqi, tag); 1365 1366 1367 if (tmf == SNIC_ITMF_LUN_RESET) { 1368 tmreq = snic_dr_req_init(snic, rqi); 1369 req_id = SCSI_NO_TAG; 1370 } else { 1371 tmreq = snic_abort_req_init(snic, rqi); 1372 req_id = tag; 1373 } 1374 1375 if (!tmreq) { 1376 ret = -ENOMEM; 1377 1378 goto tmreq_err; 1379 } 1380 1381 ret = snic_queue_itmf_req(snic, tmreq, sc, tmf, req_id); 1382 if (ret) 1383 goto tmreq_err; 1384 1385 ret = 0; 1386 1387 tmreq_err: 1388 if (ret) { 1389 SNIC_HOST_ERR(snic->shost, 1390 "issu_tmreq: Queing ITMF(%d) Req, sc %p rqi %p req_id %d tag %x fails err = %d\n", 1391 tmf, sc, rqi, req_id, tag, ret); 1392 } else { 1393 SNIC_SCSI_DBG(snic->shost, 1394 "issu_tmreq: Queuing ITMF(%d) Req, sc %p, rqi %p, req_id %d tag %x - Success.\n", 1395 tmf, sc, rqi, req_id, tag); 1396 } 1397 1398 atomic_dec(&snic->ios_inflight); 1399 1400 return ret; 1401 } 1402 1403 /* 1404 * snic_queue_abort_req : Queues abort req to WQ 1405 */ 1406 static int 1407 snic_queue_abort_req(struct snic *snic, 1408 struct snic_req_info *rqi, 1409 struct scsi_cmnd *sc, 1410 int tmf) 1411 { 1412 SNIC_SCSI_DBG(snic->shost, "q_abtreq: sc %p, rqi %p, tag %x, tmf %d\n", 1413 sc, rqi, snic_cmd_tag(sc), tmf); 1414 1415 /* Add special tag for abort */ 1416 rqi->tm_tag |= SNIC_TAG_ABORT; 1417 1418 return snic_issue_tm_req(snic, rqi, sc, tmf); 1419 } 1420 1421 /* 1422 * snic_abort_finish : called by snic_abort_cmd on queuing abort successfully. 1423 */ 1424 static int 1425 snic_abort_finish(struct snic *snic, struct scsi_cmnd *sc) 1426 { 1427 struct snic_req_info *rqi = NULL; 1428 spinlock_t *io_lock = NULL; 1429 unsigned long flags; 1430 int ret = 0, tag = snic_cmd_tag(sc); 1431 1432 io_lock = snic_io_lock_hash(snic, sc); 1433 spin_lock_irqsave(io_lock, flags); 1434 rqi = (struct snic_req_info *) CMD_SP(sc); 1435 if (!rqi) { 1436 atomic64_inc(&snic->s_stats.io.req_null); 1437 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL; 1438 1439 SNIC_SCSI_DBG(snic->shost, 1440 "abt_fini:req info is null tag 0x%x, sc 0x%p flags 0x%llx\n", 1441 tag, sc, CMD_FLAGS(sc)); 1442 ret = FAILED; 1443 1444 goto abort_fail; 1445 } 1446 1447 rqi->abts_done = NULL; 1448 1449 ret = FAILED; 1450 1451 /* Check the abort status. */ 1452 switch (CMD_ABTS_STATUS(sc)) { 1453 case SNIC_INVALID_CODE: 1454 /* Firmware didn't complete abort req, timedout */ 1455 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TIMEDOUT; 1456 atomic64_inc(&snic->s_stats.abts.drv_tmo); 1457 SNIC_SCSI_DBG(snic->shost, 1458 "abt_fini:sc %p Tag %x Driver Timeout.flags 0x%llx\n", 1459 sc, snic_cmd_tag(sc), CMD_FLAGS(sc)); 1460 /* do not release snic request in timedout case */ 1461 rqi = NULL; 1462 1463 goto abort_fail; 1464 1465 case SNIC_STAT_IO_SUCCESS: 1466 case SNIC_STAT_IO_NOT_FOUND: 1467 ret = SUCCESS; 1468 break; 1469 1470 default: 1471 /* Firmware completed abort with error */ 1472 ret = FAILED; 1473 break; 1474 } 1475 1476 CMD_SP(sc) = NULL; 1477 SNIC_HOST_INFO(snic->shost, 1478 "abt_fini: Tag %x, Cmpl Status %s flags 0x%llx\n", 1479 tag, snic_io_status_to_str(CMD_ABTS_STATUS(sc)), 1480 CMD_FLAGS(sc)); 1481 1482 abort_fail: 1483 spin_unlock_irqrestore(io_lock, flags); 1484 if (rqi) 1485 snic_release_req_buf(snic, rqi, sc); 1486 1487 return ret; 1488 } /* end of snic_abort_finish */ 1489 1490 /* 1491 * snic_send_abort_and_wait : Issues Abort, and Waits 1492 */ 1493 static int 1494 snic_send_abort_and_wait(struct snic *snic, struct scsi_cmnd *sc) 1495 { 1496 struct snic_req_info *rqi = NULL; 1497 enum snic_ioreq_state sv_state; 1498 struct snic_tgt *tgt = NULL; 1499 spinlock_t *io_lock = NULL; 1500 DECLARE_COMPLETION_ONSTACK(tm_done); 1501 unsigned long flags; 1502 int ret = 0, tmf = 0, tag = snic_cmd_tag(sc); 1503 1504 tgt = starget_to_tgt(scsi_target(sc->device)); 1505 if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN)) 1506 tmf = SNIC_ITMF_ABTS_TASK_TERM; 1507 else 1508 tmf = SNIC_ITMF_ABTS_TASK; 1509 1510 /* stats */ 1511 1512 io_lock = snic_io_lock_hash(snic, sc); 1513 1514 /* 1515 * Avoid a race between SCSI issuing the abort and the device 1516 * completing the command. 1517 * 1518 * If the command is already completed by fw_cmpl code, 1519 * we just return SUCCESS from here. This means that the abort 1520 * succeeded. In the SCSI ML, since the timeout for command has 1521 * happend, the completion wont actually complete the command 1522 * and it will be considered as an aborted command 1523 * 1524 * The CMD_SP will not be cleared except while holding io_lock 1525 */ 1526 spin_lock_irqsave(io_lock, flags); 1527 rqi = (struct snic_req_info *) CMD_SP(sc); 1528 if (!rqi) { 1529 spin_unlock_irqrestore(io_lock, flags); 1530 1531 SNIC_HOST_ERR(snic->shost, 1532 "abt_cmd: rqi is null. Tag %d flags 0x%llx\n", 1533 tag, CMD_FLAGS(sc)); 1534 1535 ret = SUCCESS; 1536 1537 goto send_abts_end; 1538 } 1539 1540 rqi->abts_done = &tm_done; 1541 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) { 1542 spin_unlock_irqrestore(io_lock, flags); 1543 1544 ret = 0; 1545 goto abts_pending; 1546 } 1547 SNIC_BUG_ON(!rqi->abts_done); 1548 1549 /* Save Command State, should be restored on failed to Queue. */ 1550 sv_state = CMD_STATE(sc); 1551 1552 /* 1553 * Command is still pending, need to abort it 1554 * If the fw completes the command after this point, 1555 * the completion won't be done till mid-layer, since abot 1556 * has already started. 1557 */ 1558 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING; 1559 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE; 1560 1561 SNIC_SCSI_DBG(snic->shost, "send_abt_cmd: TAG 0x%x\n", tag); 1562 1563 spin_unlock_irqrestore(io_lock, flags); 1564 1565 /* Now Queue the abort command to firmware */ 1566 ret = snic_queue_abort_req(snic, rqi, sc, tmf); 1567 if (ret) { 1568 atomic64_inc(&snic->s_stats.abts.q_fail); 1569 SNIC_HOST_ERR(snic->shost, 1570 "send_abt_cmd: IO w/ Tag 0x%x fail w/ err %d flags 0x%llx\n", 1571 tag, ret, CMD_FLAGS(sc)); 1572 1573 spin_lock_irqsave(io_lock, flags); 1574 /* Restore Command's previous state */ 1575 CMD_STATE(sc) = sv_state; 1576 rqi = (struct snic_req_info *) CMD_SP(sc); 1577 if (rqi) 1578 rqi->abts_done = NULL; 1579 spin_unlock_irqrestore(io_lock, flags); 1580 ret = FAILED; 1581 1582 goto send_abts_end; 1583 } 1584 1585 spin_lock_irqsave(io_lock, flags); 1586 if (tmf == SNIC_ITMF_ABTS_TASK) { 1587 CMD_FLAGS(sc) |= SNIC_IO_ABTS_ISSUED; 1588 atomic64_inc(&snic->s_stats.abts.num); 1589 } else { 1590 /* term stats */ 1591 CMD_FLAGS(sc) |= SNIC_IO_TERM_ISSUED; 1592 } 1593 spin_unlock_irqrestore(io_lock, flags); 1594 1595 SNIC_SCSI_DBG(snic->shost, 1596 "send_abt_cmd: sc %p Tag %x flags 0x%llx\n", 1597 sc, tag, CMD_FLAGS(sc)); 1598 1599 1600 ret = 0; 1601 1602 abts_pending: 1603 /* 1604 * Queued an abort IO, wait for its completion. 1605 * Once the fw completes the abort command, it will 1606 * wakeup this thread. 1607 */ 1608 wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT); 1609 1610 send_abts_end: 1611 return ret; 1612 } /* end of snic_send_abort_and_wait */ 1613 1614 /* 1615 * This function is exported to SCSI for sending abort cmnds. 1616 * A SCSI IO is represent by snic_ioreq in the driver. 1617 * The snic_ioreq is linked to the SCSI Cmd, thus a link with the ULP'S IO 1618 */ 1619 int 1620 snic_abort_cmd(struct scsi_cmnd *sc) 1621 { 1622 struct snic *snic = shost_priv(sc->device->host); 1623 int ret = SUCCESS, tag = snic_cmd_tag(sc); 1624 u32 start_time = jiffies; 1625 1626 SNIC_SCSI_DBG(snic->shost, "abt_cmd:sc %p :0x%x :req = %p :tag = %d\n", 1627 sc, sc->cmnd[0], sc->request, tag); 1628 1629 if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) { 1630 SNIC_HOST_ERR(snic->shost, 1631 "abt_cmd: tag %x Parent Devs are not rdy\n", 1632 tag); 1633 ret = FAST_IO_FAIL; 1634 1635 goto abort_end; 1636 } 1637 1638 1639 ret = snic_send_abort_and_wait(snic, sc); 1640 if (ret) 1641 goto abort_end; 1642 1643 ret = snic_abort_finish(snic, sc); 1644 1645 abort_end: 1646 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, 1647 jiffies_to_msecs(jiffies - start_time), 0, 1648 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc)); 1649 1650 SNIC_SCSI_DBG(snic->shost, 1651 "abts: Abort Req Status = %s\n", 1652 (ret == SUCCESS) ? "SUCCESS" : 1653 ((ret == FAST_IO_FAIL) ? "FAST_IO_FAIL" : "FAILED")); 1654 1655 return ret; 1656 } 1657 1658 1659 1660 static int 1661 snic_is_abts_pending(struct snic *snic, struct scsi_cmnd *lr_sc) 1662 { 1663 struct snic_req_info *rqi = NULL; 1664 struct scsi_cmnd *sc = NULL; 1665 struct scsi_device *lr_sdev = NULL; 1666 spinlock_t *io_lock = NULL; 1667 u32 tag; 1668 unsigned long flags; 1669 1670 if (lr_sc) 1671 lr_sdev = lr_sc->device; 1672 1673 /* walk through the tag map, an dcheck if IOs are still pending in fw*/ 1674 for (tag = 0; tag < snic->max_tag_id; tag++) { 1675 io_lock = snic_io_lock_tag(snic, tag); 1676 1677 spin_lock_irqsave(io_lock, flags); 1678 sc = scsi_host_find_tag(snic->shost, tag); 1679 1680 if (!sc || (lr_sc && (sc->device != lr_sdev || sc == lr_sc))) { 1681 spin_unlock_irqrestore(io_lock, flags); 1682 1683 continue; 1684 } 1685 1686 rqi = (struct snic_req_info *) CMD_SP(sc); 1687 if (!rqi) { 1688 spin_unlock_irqrestore(io_lock, flags); 1689 1690 continue; 1691 } 1692 1693 /* 1694 * Found IO that is still pending w/ firmware and belongs to 1695 * the LUN that is under reset, if lr_sc != NULL 1696 */ 1697 SNIC_SCSI_DBG(snic->shost, "Found IO in %s on LUN\n", 1698 snic_ioreq_state_to_str(CMD_STATE(sc))); 1699 1700 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) { 1701 spin_unlock_irqrestore(io_lock, flags); 1702 1703 return 1; 1704 } 1705 1706 spin_unlock_irqrestore(io_lock, flags); 1707 } 1708 1709 return 0; 1710 } /* end of snic_is_abts_pending */ 1711 1712 static int 1713 snic_dr_clean_single_req(struct snic *snic, 1714 u32 tag, 1715 struct scsi_device *lr_sdev) 1716 { 1717 struct snic_req_info *rqi = NULL; 1718 struct snic_tgt *tgt = NULL; 1719 struct scsi_cmnd *sc = NULL; 1720 spinlock_t *io_lock = NULL; 1721 u32 sv_state = 0, tmf = 0; 1722 DECLARE_COMPLETION_ONSTACK(tm_done); 1723 unsigned long flags; 1724 int ret = 0; 1725 1726 io_lock = snic_io_lock_tag(snic, tag); 1727 spin_lock_irqsave(io_lock, flags); 1728 sc = scsi_host_find_tag(snic->shost, tag); 1729 1730 /* Ignore Cmd that don't belong to Lun Reset device */ 1731 if (!sc || sc->device != lr_sdev) 1732 goto skip_clean; 1733 1734 rqi = (struct snic_req_info *) CMD_SP(sc); 1735 1736 if (!rqi) 1737 goto skip_clean; 1738 1739 1740 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) 1741 goto skip_clean; 1742 1743 1744 if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) && 1745 (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) { 1746 1747 SNIC_SCSI_DBG(snic->shost, 1748 "clean_single_req: devrst is not pending sc 0x%p\n", 1749 sc); 1750 1751 goto skip_clean; 1752 } 1753 1754 SNIC_SCSI_DBG(snic->shost, 1755 "clean_single_req: Found IO in %s on lun\n", 1756 snic_ioreq_state_to_str(CMD_STATE(sc))); 1757 1758 /* Save Command State */ 1759 sv_state = CMD_STATE(sc); 1760 1761 /* 1762 * Any pending IO issued prior to reset is expected to be 1763 * in abts pending state, if not we need to set SNIC_IOREQ_ABTS_PENDING 1764 * to indicate the IO is abort pending. 1765 * When IO is completed, the IO will be handed over and handled 1766 * in this function. 1767 */ 1768 1769 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING; 1770 SNIC_BUG_ON(rqi->abts_done); 1771 1772 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) { 1773 rqi->tm_tag = SNIC_TAG_DEV_RST; 1774 1775 SNIC_SCSI_DBG(snic->shost, 1776 "clean_single_req:devrst sc 0x%p\n", sc); 1777 } 1778 1779 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE; 1780 rqi->abts_done = &tm_done; 1781 spin_unlock_irqrestore(io_lock, flags); 1782 1783 tgt = starget_to_tgt(scsi_target(sc->device)); 1784 if ((snic_tgt_chkready(tgt) != 0) && (tgt->tdata.typ == SNIC_TGT_SAN)) 1785 tmf = SNIC_ITMF_ABTS_TASK_TERM; 1786 else 1787 tmf = SNIC_ITMF_ABTS_TASK; 1788 1789 /* Now queue the abort command to firmware */ 1790 ret = snic_queue_abort_req(snic, rqi, sc, tmf); 1791 if (ret) { 1792 SNIC_HOST_ERR(snic->shost, 1793 "clean_single_req_err:sc %p, tag %d abt failed. tm_tag %d flags 0x%llx\n", 1794 sc, tag, rqi->tm_tag, CMD_FLAGS(sc)); 1795 1796 spin_lock_irqsave(io_lock, flags); 1797 rqi = (struct snic_req_info *) CMD_SP(sc); 1798 if (rqi) 1799 rqi->abts_done = NULL; 1800 1801 /* Restore Command State */ 1802 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) 1803 CMD_STATE(sc) = sv_state; 1804 1805 ret = 1; 1806 goto skip_clean; 1807 } 1808 1809 spin_lock_irqsave(io_lock, flags); 1810 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) 1811 CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED; 1812 1813 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED; 1814 spin_unlock_irqrestore(io_lock, flags); 1815 1816 wait_for_completion_timeout(&tm_done, SNIC_ABTS_TIMEOUT); 1817 1818 /* Recheck cmd state to check if it now aborted. */ 1819 spin_lock_irqsave(io_lock, flags); 1820 rqi = (struct snic_req_info *) CMD_SP(sc); 1821 if (!rqi) { 1822 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_REQ_NULL; 1823 goto skip_clean; 1824 } 1825 rqi->abts_done = NULL; 1826 1827 /* if abort is still pending w/ fw, fail */ 1828 if (CMD_ABTS_STATUS(sc) == SNIC_INVALID_CODE) { 1829 SNIC_HOST_ERR(snic->shost, 1830 "clean_single_req_err:sc %p tag %d abt still pending w/ fw, tm_tag %d flags 0x%llx\n", 1831 sc, tag, rqi->tm_tag, CMD_FLAGS(sc)); 1832 1833 CMD_FLAGS(sc) |= SNIC_IO_ABTS_TERM_DONE; 1834 ret = 1; 1835 1836 goto skip_clean; 1837 } 1838 1839 CMD_STATE(sc) = SNIC_IOREQ_ABTS_COMPLETE; 1840 CMD_SP(sc) = NULL; 1841 spin_unlock_irqrestore(io_lock, flags); 1842 1843 snic_release_req_buf(snic, rqi, sc); 1844 1845 ret = 0; 1846 1847 return ret; 1848 1849 skip_clean: 1850 spin_unlock_irqrestore(io_lock, flags); 1851 1852 return ret; 1853 } /* end of snic_dr_clean_single_req */ 1854 1855 static int 1856 snic_dr_clean_pending_req(struct snic *snic, struct scsi_cmnd *lr_sc) 1857 { 1858 struct scsi_device *lr_sdev = lr_sc->device; 1859 u32 tag = 0; 1860 int ret = FAILED; 1861 1862 for (tag = 0; tag < snic->max_tag_id; tag++) { 1863 if (tag == snic_cmd_tag(lr_sc)) 1864 continue; 1865 1866 ret = snic_dr_clean_single_req(snic, tag, lr_sdev); 1867 if (ret) { 1868 SNIC_HOST_ERR(snic->shost, "clean_err:tag = %d\n", tag); 1869 1870 goto clean_err; 1871 } 1872 } 1873 1874 schedule_timeout(msecs_to_jiffies(100)); 1875 1876 /* Walk through all the cmds and check abts status. */ 1877 if (snic_is_abts_pending(snic, lr_sc)) { 1878 ret = FAILED; 1879 1880 goto clean_err; 1881 } 1882 1883 ret = 0; 1884 SNIC_SCSI_DBG(snic->shost, "clean_pending_req: Success.\n"); 1885 1886 return ret; 1887 1888 clean_err: 1889 ret = FAILED; 1890 SNIC_HOST_ERR(snic->shost, 1891 "Failed to Clean Pending IOs on %s device.\n", 1892 dev_name(&lr_sdev->sdev_gendev)); 1893 1894 return ret; 1895 1896 } /* end of snic_dr_clean_pending_req */ 1897 1898 /* 1899 * snic_dr_finish : Called by snic_device_reset 1900 */ 1901 static int 1902 snic_dr_finish(struct snic *snic, struct scsi_cmnd *sc) 1903 { 1904 struct snic_req_info *rqi = NULL; 1905 spinlock_t *io_lock = NULL; 1906 unsigned long flags; 1907 int lr_res = 0; 1908 int ret = FAILED; 1909 1910 io_lock = snic_io_lock_hash(snic, sc); 1911 spin_lock_irqsave(io_lock, flags); 1912 rqi = (struct snic_req_info *) CMD_SP(sc); 1913 if (!rqi) { 1914 spin_unlock_irqrestore(io_lock, flags); 1915 SNIC_SCSI_DBG(snic->shost, 1916 "dr_fini: rqi is null tag 0x%x sc 0x%p flags 0x%llx\n", 1917 snic_cmd_tag(sc), sc, CMD_FLAGS(sc)); 1918 1919 ret = FAILED; 1920 goto dr_fini_end; 1921 } 1922 1923 rqi->dr_done = NULL; 1924 1925 lr_res = CMD_LR_STATUS(sc); 1926 1927 switch (lr_res) { 1928 case SNIC_INVALID_CODE: 1929 /* stats */ 1930 SNIC_SCSI_DBG(snic->shost, 1931 "dr_fini: Tag %x Dev Reset Timedout. flags 0x%llx\n", 1932 snic_cmd_tag(sc), CMD_FLAGS(sc)); 1933 1934 CMD_FLAGS(sc) |= SNIC_DEV_RST_TIMEDOUT; 1935 ret = FAILED; 1936 1937 goto dr_failed; 1938 1939 case SNIC_STAT_IO_SUCCESS: 1940 SNIC_SCSI_DBG(snic->shost, 1941 "dr_fini: Tag %x Dev Reset cmpl\n", 1942 snic_cmd_tag(sc)); 1943 ret = 0; 1944 break; 1945 1946 default: 1947 SNIC_HOST_ERR(snic->shost, 1948 "dr_fini:Device Reset completed& failed.Tag = %x lr_status %s flags 0x%llx\n", 1949 snic_cmd_tag(sc), 1950 snic_io_status_to_str(lr_res), CMD_FLAGS(sc)); 1951 ret = FAILED; 1952 goto dr_failed; 1953 } 1954 spin_unlock_irqrestore(io_lock, flags); 1955 1956 /* 1957 * Cleanup any IOs on this LUN that have still not completed. 1958 * If any of these fail, then LUN Reset fails. 1959 * Cleanup cleans all commands on this LUN except 1960 * the lun reset command. If all cmds get cleaned, the LUN Reset 1961 * succeeds. 1962 */ 1963 1964 ret = snic_dr_clean_pending_req(snic, sc); 1965 if (ret) { 1966 spin_lock_irqsave(io_lock, flags); 1967 SNIC_SCSI_DBG(snic->shost, 1968 "dr_fini: Device Reset Failed since could not abort all IOs. Tag = %x.\n", 1969 snic_cmd_tag(sc)); 1970 rqi = (struct snic_req_info *) CMD_SP(sc); 1971 1972 goto dr_failed; 1973 } else { 1974 /* Cleanup LUN Reset Command */ 1975 spin_lock_irqsave(io_lock, flags); 1976 rqi = (struct snic_req_info *) CMD_SP(sc); 1977 if (rqi) 1978 ret = SUCCESS; /* Completed Successfully */ 1979 else 1980 ret = FAILED; 1981 } 1982 1983 dr_failed: 1984 SNIC_BUG_ON(!spin_is_locked(io_lock)); 1985 if (rqi) 1986 CMD_SP(sc) = NULL; 1987 spin_unlock_irqrestore(io_lock, flags); 1988 1989 if (rqi) 1990 snic_release_req_buf(snic, rqi, sc); 1991 1992 dr_fini_end: 1993 return ret; 1994 } /* end of snic_dr_finish */ 1995 1996 static int 1997 snic_queue_dr_req(struct snic *snic, 1998 struct snic_req_info *rqi, 1999 struct scsi_cmnd *sc) 2000 { 2001 /* Add special tag for device reset */ 2002 rqi->tm_tag |= SNIC_TAG_DEV_RST; 2003 2004 return snic_issue_tm_req(snic, rqi, sc, SNIC_ITMF_LUN_RESET); 2005 } 2006 2007 static int 2008 snic_send_dr_and_wait(struct snic *snic, struct scsi_cmnd *sc) 2009 { 2010 struct snic_req_info *rqi = NULL; 2011 enum snic_ioreq_state sv_state; 2012 spinlock_t *io_lock = NULL; 2013 unsigned long flags; 2014 DECLARE_COMPLETION_ONSTACK(tm_done); 2015 int ret = FAILED, tag = snic_cmd_tag(sc); 2016 2017 io_lock = snic_io_lock_hash(snic, sc); 2018 spin_lock_irqsave(io_lock, flags); 2019 CMD_FLAGS(sc) |= SNIC_DEVICE_RESET; 2020 rqi = (struct snic_req_info *) CMD_SP(sc); 2021 if (!rqi) { 2022 SNIC_HOST_ERR(snic->shost, 2023 "send_dr: rqi is null, Tag 0x%x flags 0x%llx\n", 2024 tag, CMD_FLAGS(sc)); 2025 spin_unlock_irqrestore(io_lock, flags); 2026 2027 ret = FAILED; 2028 goto send_dr_end; 2029 } 2030 2031 /* Save Command state to restore in case Queuing failed. */ 2032 sv_state = CMD_STATE(sc); 2033 2034 CMD_STATE(sc) = SNIC_IOREQ_LR_PENDING; 2035 CMD_LR_STATUS(sc) = SNIC_INVALID_CODE; 2036 2037 SNIC_SCSI_DBG(snic->shost, "dr: TAG = %x\n", tag); 2038 2039 rqi->dr_done = &tm_done; 2040 SNIC_BUG_ON(!rqi->dr_done); 2041 2042 spin_unlock_irqrestore(io_lock, flags); 2043 /* 2044 * The Command state is changed to IOREQ_PENDING, 2045 * in this case, if the command is completed, the icmnd_cmpl will 2046 * mark the cmd as completed. 2047 * This logic still makes LUN Reset is inevitable. 2048 */ 2049 2050 ret = snic_queue_dr_req(snic, rqi, sc); 2051 if (ret) { 2052 SNIC_HOST_ERR(snic->shost, 2053 "send_dr: IO w/ Tag 0x%x Failed err = %d. flags 0x%llx\n", 2054 tag, ret, CMD_FLAGS(sc)); 2055 2056 spin_lock_irqsave(io_lock, flags); 2057 /* Restore State */ 2058 CMD_STATE(sc) = sv_state; 2059 rqi = (struct snic_req_info *) CMD_SP(sc); 2060 if (rqi) 2061 rqi->dr_done = NULL; 2062 /* rqi is freed in caller. */ 2063 spin_unlock_irqrestore(io_lock, flags); 2064 ret = FAILED; 2065 2066 goto send_dr_end; 2067 } 2068 2069 spin_lock_irqsave(io_lock, flags); 2070 CMD_FLAGS(sc) |= SNIC_DEV_RST_ISSUED; 2071 spin_unlock_irqrestore(io_lock, flags); 2072 2073 ret = 0; 2074 2075 wait_for_completion_timeout(&tm_done, SNIC_LUN_RESET_TIMEOUT); 2076 2077 send_dr_end: 2078 return ret; 2079 } 2080 2081 /* 2082 * auxillary funciton to check lun reset op is supported or not 2083 * Not supported if returns 0 2084 */ 2085 static int 2086 snic_dev_reset_supported(struct scsi_device *sdev) 2087 { 2088 struct snic_tgt *tgt = starget_to_tgt(scsi_target(sdev)); 2089 2090 if (tgt->tdata.typ == SNIC_TGT_DAS) 2091 return 0; 2092 2093 return 1; 2094 } 2095 2096 static void 2097 snic_unlink_and_release_req(struct snic *snic, struct scsi_cmnd *sc, int flag) 2098 { 2099 struct snic_req_info *rqi = NULL; 2100 spinlock_t *io_lock = NULL; 2101 unsigned long flags; 2102 u32 start_time = jiffies; 2103 2104 io_lock = snic_io_lock_hash(snic, sc); 2105 spin_lock_irqsave(io_lock, flags); 2106 rqi = (struct snic_req_info *) CMD_SP(sc); 2107 if (rqi) { 2108 start_time = rqi->start_time; 2109 CMD_SP(sc) = NULL; 2110 } 2111 2112 CMD_FLAGS(sc) |= flag; 2113 spin_unlock_irqrestore(io_lock, flags); 2114 2115 if (rqi) 2116 snic_release_req_buf(snic, rqi, sc); 2117 2118 SNIC_TRC(snic->shost->host_no, snic_cmd_tag(sc), (ulong) sc, 2119 jiffies_to_msecs(jiffies - start_time), (ulong) rqi, 2120 SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc)); 2121 } 2122 2123 /* 2124 * SCSI Eh thread issues a LUN Reset when one or more commands on a LUN 2125 * fail to get aborted. It calls driver's eh_device_reset with a SCSI 2126 * command on the LUN. 2127 */ 2128 int 2129 snic_device_reset(struct scsi_cmnd *sc) 2130 { 2131 struct Scsi_Host *shost = sc->device->host; 2132 struct snic *snic = shost_priv(shost); 2133 struct snic_req_info *rqi = NULL; 2134 int tag = snic_cmd_tag(sc); 2135 int start_time = jiffies; 2136 int ret = FAILED; 2137 int dr_supp = 0; 2138 2139 SNIC_SCSI_DBG(shost, "dev_reset:sc %p :0x%x :req = %p :tag = %d\n", 2140 sc, sc->cmnd[0], sc->request, 2141 snic_cmd_tag(sc)); 2142 dr_supp = snic_dev_reset_supported(sc->device); 2143 if (!dr_supp) { 2144 /* device reset op is not supported */ 2145 SNIC_HOST_INFO(shost, "LUN Reset Op not supported.\n"); 2146 snic_unlink_and_release_req(snic, sc, SNIC_DEV_RST_NOTSUP); 2147 2148 goto dev_rst_end; 2149 } 2150 2151 if (unlikely(snic_get_state(snic) != SNIC_ONLINE)) { 2152 snic_unlink_and_release_req(snic, sc, 0); 2153 SNIC_HOST_ERR(shost, "Devrst: Parent Devs are not online.\n"); 2154 2155 goto dev_rst_end; 2156 } 2157 2158 /* There is no tag when lun reset is issue through ioctl. */ 2159 if (unlikely(tag <= SNIC_NO_TAG)) { 2160 SNIC_HOST_INFO(snic->shost, 2161 "Devrst: LUN Reset Recvd thru IOCTL.\n"); 2162 2163 rqi = snic_req_init(snic, 0); 2164 if (!rqi) 2165 goto dev_rst_end; 2166 2167 memset(scsi_cmd_priv(sc), 0, 2168 sizeof(struct snic_internal_io_state)); 2169 CMD_SP(sc) = (char *)rqi; 2170 CMD_FLAGS(sc) = SNIC_NO_FLAGS; 2171 2172 /* Add special tag for dr coming from user spc */ 2173 rqi->tm_tag = SNIC_TAG_IOCTL_DEV_RST; 2174 rqi->sc = sc; 2175 } 2176 2177 ret = snic_send_dr_and_wait(snic, sc); 2178 if (ret) { 2179 SNIC_HOST_ERR(snic->shost, 2180 "Devrst: IO w/ Tag %x Failed w/ err = %d\n", 2181 tag, ret); 2182 2183 snic_unlink_and_release_req(snic, sc, 0); 2184 2185 goto dev_rst_end; 2186 } 2187 2188 ret = snic_dr_finish(snic, sc); 2189 2190 dev_rst_end: 2191 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, 2192 jiffies_to_msecs(jiffies - start_time), 2193 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc)); 2194 2195 SNIC_SCSI_DBG(snic->shost, 2196 "Devrst: Returning from Device Reset : %s\n", 2197 (ret == SUCCESS) ? "SUCCESS" : "FAILED"); 2198 2199 return ret; 2200 } /* end of snic_device_reset */ 2201 2202 /* 2203 * SCSI Error handling calls driver's eh_host_reset if all prior 2204 * error handling levels return FAILED. 2205 * 2206 * Host Reset is the highest level of error recovery. If this fails, then 2207 * host is offlined by SCSI. 2208 */ 2209 /* 2210 * snic_issue_hba_reset : Queues FW Reset Request. 2211 */ 2212 static int 2213 snic_issue_hba_reset(struct snic *snic, struct scsi_cmnd *sc) 2214 { 2215 struct snic_req_info *rqi = NULL; 2216 struct snic_host_req *req = NULL; 2217 spinlock_t *io_lock = NULL; 2218 DECLARE_COMPLETION_ONSTACK(wait); 2219 unsigned long flags; 2220 int ret = -ENOMEM; 2221 2222 rqi = snic_req_init(snic, 0); 2223 if (!rqi) { 2224 ret = -ENOMEM; 2225 2226 goto hba_rst_end; 2227 } 2228 2229 if (snic_cmd_tag(sc) == SCSI_NO_TAG) { 2230 memset(scsi_cmd_priv(sc), 0, 2231 sizeof(struct snic_internal_io_state)); 2232 SNIC_HOST_INFO(snic->shost, "issu_hr:Host reset thru ioctl.\n"); 2233 rqi->sc = sc; 2234 } 2235 2236 req = rqi_to_req(rqi); 2237 2238 io_lock = snic_io_lock_hash(snic, sc); 2239 spin_lock_irqsave(io_lock, flags); 2240 SNIC_BUG_ON(CMD_SP(sc) != NULL); 2241 CMD_STATE(sc) = SNIC_IOREQ_PENDING; 2242 CMD_SP(sc) = (char *) rqi; 2243 CMD_FLAGS(sc) |= SNIC_IO_INITIALIZED; 2244 snic->remove_wait = &wait; 2245 spin_unlock_irqrestore(io_lock, flags); 2246 2247 /* Initialize Request */ 2248 snic_io_hdr_enc(&req->hdr, SNIC_REQ_HBA_RESET, 0, snic_cmd_tag(sc), 2249 snic->config.hid, 0, (ulong) rqi); 2250 2251 req->u.reset.flags = 0; 2252 2253 ret = snic_queue_wq_desc(snic, req, sizeof(*req)); 2254 if (ret) { 2255 SNIC_HOST_ERR(snic->shost, 2256 "issu_hr:Queuing HBA Reset Failed. w err %d\n", 2257 ret); 2258 2259 goto hba_rst_err; 2260 } 2261 2262 spin_lock_irqsave(io_lock, flags); 2263 CMD_FLAGS(sc) |= SNIC_HOST_RESET_ISSUED; 2264 spin_unlock_irqrestore(io_lock, flags); 2265 atomic64_inc(&snic->s_stats.reset.hba_resets); 2266 SNIC_HOST_INFO(snic->shost, "Queued HBA Reset Successfully.\n"); 2267 2268 wait_for_completion_timeout(snic->remove_wait, 2269 SNIC_HOST_RESET_TIMEOUT); 2270 2271 if (snic_get_state(snic) == SNIC_FWRESET) { 2272 SNIC_HOST_ERR(snic->shost, "reset_cmpl: Reset Timedout.\n"); 2273 ret = -ETIMEDOUT; 2274 2275 goto hba_rst_err; 2276 } 2277 2278 spin_lock_irqsave(io_lock, flags); 2279 snic->remove_wait = NULL; 2280 rqi = (struct snic_req_info *) CMD_SP(sc); 2281 CMD_SP(sc) = NULL; 2282 spin_unlock_irqrestore(io_lock, flags); 2283 2284 if (rqi) 2285 snic_req_free(snic, rqi); 2286 2287 ret = 0; 2288 2289 return ret; 2290 2291 hba_rst_err: 2292 spin_lock_irqsave(io_lock, flags); 2293 snic->remove_wait = NULL; 2294 rqi = (struct snic_req_info *) CMD_SP(sc); 2295 CMD_SP(sc) = NULL; 2296 spin_unlock_irqrestore(io_lock, flags); 2297 2298 if (rqi) 2299 snic_req_free(snic, rqi); 2300 2301 hba_rst_end: 2302 SNIC_HOST_ERR(snic->shost, 2303 "reset:HBA Reset Failed w/ err = %d.\n", 2304 ret); 2305 2306 return ret; 2307 } /* end of snic_issue_hba_reset */ 2308 2309 int 2310 snic_reset(struct Scsi_Host *shost, struct scsi_cmnd *sc) 2311 { 2312 struct snic *snic = shost_priv(shost); 2313 enum snic_state sv_state; 2314 unsigned long flags; 2315 int ret = FAILED; 2316 2317 /* Set snic state as SNIC_FWRESET*/ 2318 sv_state = snic_get_state(snic); 2319 2320 spin_lock_irqsave(&snic->snic_lock, flags); 2321 if (snic_get_state(snic) == SNIC_FWRESET) { 2322 spin_unlock_irqrestore(&snic->snic_lock, flags); 2323 SNIC_HOST_INFO(shost, "reset:prev reset is in progres\n"); 2324 2325 msleep(SNIC_HOST_RESET_TIMEOUT); 2326 ret = SUCCESS; 2327 2328 goto reset_end; 2329 } 2330 2331 snic_set_state(snic, SNIC_FWRESET); 2332 spin_unlock_irqrestore(&snic->snic_lock, flags); 2333 2334 2335 /* Wait for all the IOs that are entered in Qcmd */ 2336 while (atomic_read(&snic->ios_inflight)) 2337 schedule_timeout(msecs_to_jiffies(1)); 2338 2339 ret = snic_issue_hba_reset(snic, sc); 2340 if (ret) { 2341 SNIC_HOST_ERR(shost, 2342 "reset:Host Reset Failed w/ err %d.\n", 2343 ret); 2344 spin_lock_irqsave(&snic->snic_lock, flags); 2345 snic_set_state(snic, sv_state); 2346 spin_unlock_irqrestore(&snic->snic_lock, flags); 2347 atomic64_inc(&snic->s_stats.reset.hba_reset_fail); 2348 ret = FAILED; 2349 2350 goto reset_end; 2351 } 2352 2353 ret = SUCCESS; 2354 2355 reset_end: 2356 return ret; 2357 } /* end of snic_reset */ 2358 2359 /* 2360 * SCSI Error handling calls driver's eh_host_reset if all prior 2361 * error handling levels return FAILED. 2362 * 2363 * Host Reset is the highest level of error recovery. If this fails, then 2364 * host is offlined by SCSI. 2365 */ 2366 int 2367 snic_host_reset(struct scsi_cmnd *sc) 2368 { 2369 struct Scsi_Host *shost = sc->device->host; 2370 u32 start_time = jiffies; 2371 int ret = FAILED; 2372 2373 SNIC_SCSI_DBG(shost, 2374 "host reset:sc %p sc_cmd 0x%x req %p tag %d flags 0x%llx\n", 2375 sc, sc->cmnd[0], sc->request, 2376 snic_cmd_tag(sc), CMD_FLAGS(sc)); 2377 2378 ret = snic_reset(shost, sc); 2379 2380 SNIC_TRC(shost->host_no, snic_cmd_tag(sc), (ulong) sc, 2381 jiffies_to_msecs(jiffies - start_time), 2382 0, SNIC_TRC_CMD(sc), SNIC_TRC_CMD_STATE_FLAGS(sc)); 2383 2384 return ret; 2385 } /* end of snic_host_reset */ 2386 2387 /* 2388 * snic_cmpl_pending_tmreq : Caller should hold io_lock 2389 */ 2390 static void 2391 snic_cmpl_pending_tmreq(struct snic *snic, struct scsi_cmnd *sc) 2392 { 2393 struct snic_req_info *rqi = NULL; 2394 2395 SNIC_SCSI_DBG(snic->shost, 2396 "Completing Pending TM Req sc %p, state %s flags 0x%llx\n", 2397 sc, snic_io_status_to_str(CMD_STATE(sc)), CMD_FLAGS(sc)); 2398 2399 rqi = (struct snic_req_info *) CMD_SP(sc); 2400 if (!rqi) 2401 return; 2402 2403 if (rqi->dr_done) 2404 complete(rqi->dr_done); 2405 else if (rqi->abts_done) 2406 complete(rqi->abts_done); 2407 } 2408 2409 /* 2410 * snic_scsi_cleanup: Walks through tag map and releases the reqs 2411 */ 2412 static void 2413 snic_scsi_cleanup(struct snic *snic, int ex_tag) 2414 { 2415 struct snic_req_info *rqi = NULL; 2416 struct scsi_cmnd *sc = NULL; 2417 spinlock_t *io_lock = NULL; 2418 unsigned long flags; 2419 int tag; 2420 u64 st_time = 0; 2421 2422 SNIC_SCSI_DBG(snic->shost, "sc_clean: scsi cleanup.\n"); 2423 2424 for (tag = 0; tag < snic->max_tag_id; tag++) { 2425 /* Skip ex_tag */ 2426 if (tag == ex_tag) 2427 continue; 2428 2429 io_lock = snic_io_lock_tag(snic, tag); 2430 spin_lock_irqsave(io_lock, flags); 2431 sc = scsi_host_find_tag(snic->shost, tag); 2432 if (!sc) { 2433 spin_unlock_irqrestore(io_lock, flags); 2434 2435 continue; 2436 } 2437 2438 if (unlikely(snic_tmreq_pending(sc))) { 2439 /* 2440 * When FW Completes reset w/o sending completions 2441 * for outstanding ios. 2442 */ 2443 snic_cmpl_pending_tmreq(snic, sc); 2444 spin_unlock_irqrestore(io_lock, flags); 2445 2446 continue; 2447 } 2448 2449 rqi = (struct snic_req_info *) CMD_SP(sc); 2450 if (!rqi) { 2451 spin_unlock_irqrestore(io_lock, flags); 2452 2453 goto cleanup; 2454 } 2455 2456 SNIC_SCSI_DBG(snic->shost, 2457 "sc_clean: sc %p, rqi %p, tag %d flags 0x%llx\n", 2458 sc, rqi, tag, CMD_FLAGS(sc)); 2459 2460 CMD_SP(sc) = NULL; 2461 CMD_FLAGS(sc) |= SNIC_SCSI_CLEANUP; 2462 spin_unlock_irqrestore(io_lock, flags); 2463 st_time = rqi->start_time; 2464 2465 SNIC_HOST_INFO(snic->shost, 2466 "sc_clean: Releasing rqi %p : flags 0x%llx\n", 2467 rqi, CMD_FLAGS(sc)); 2468 2469 snic_release_req_buf(snic, rqi, sc); 2470 2471 cleanup: 2472 sc->result = DID_TRANSPORT_DISRUPTED << 16; 2473 SNIC_HOST_INFO(snic->shost, 2474 "sc_clean: DID_TRANSPORT_DISRUPTED for sc %p, Tag %d flags 0x%llx rqi %p duration %u msecs\n", 2475 sc, sc->request->tag, CMD_FLAGS(sc), rqi, 2476 jiffies_to_msecs(jiffies - st_time)); 2477 2478 /* Update IO stats */ 2479 snic_stats_update_io_cmpl(&snic->s_stats); 2480 2481 if (sc->scsi_done) { 2482 SNIC_TRC(snic->shost->host_no, tag, (ulong) sc, 2483 jiffies_to_msecs(jiffies - st_time), 0, 2484 SNIC_TRC_CMD(sc), 2485 SNIC_TRC_CMD_STATE_FLAGS(sc)); 2486 2487 sc->scsi_done(sc); 2488 } 2489 } 2490 } /* end of snic_scsi_cleanup */ 2491 2492 void 2493 snic_shutdown_scsi_cleanup(struct snic *snic) 2494 { 2495 SNIC_HOST_INFO(snic->shost, "Shutdown time SCSI Cleanup.\n"); 2496 2497 snic_scsi_cleanup(snic, SCSI_NO_TAG); 2498 } /* end of snic_shutdown_scsi_cleanup */ 2499 2500 /* 2501 * snic_internal_abort_io 2502 * called by : snic_tgt_scsi_abort_io 2503 */ 2504 static int 2505 snic_internal_abort_io(struct snic *snic, struct scsi_cmnd *sc, int tmf) 2506 { 2507 struct snic_req_info *rqi = NULL; 2508 spinlock_t *io_lock = NULL; 2509 unsigned long flags; 2510 u32 sv_state = 0; 2511 int ret = 0; 2512 2513 io_lock = snic_io_lock_hash(snic, sc); 2514 spin_lock_irqsave(io_lock, flags); 2515 rqi = (struct snic_req_info *) CMD_SP(sc); 2516 if (!rqi) 2517 goto skip_internal_abts; 2518 2519 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) 2520 goto skip_internal_abts; 2521 2522 if ((CMD_FLAGS(sc) & SNIC_DEVICE_RESET) && 2523 (!(CMD_FLAGS(sc) & SNIC_DEV_RST_ISSUED))) { 2524 2525 SNIC_SCSI_DBG(snic->shost, 2526 "internal_abts: dev rst not pending sc 0x%p\n", 2527 sc); 2528 2529 goto skip_internal_abts; 2530 } 2531 2532 2533 if (!(CMD_FLAGS(sc) & SNIC_IO_ISSUED)) { 2534 SNIC_SCSI_DBG(snic->shost, 2535 "internal_abts: IO not yet issued sc 0x%p tag 0x%x flags 0x%llx state %d\n", 2536 sc, snic_cmd_tag(sc), CMD_FLAGS(sc), CMD_STATE(sc)); 2537 2538 goto skip_internal_abts; 2539 } 2540 2541 sv_state = CMD_STATE(sc); 2542 CMD_STATE(sc) = SNIC_IOREQ_ABTS_PENDING; 2543 CMD_ABTS_STATUS(sc) = SNIC_INVALID_CODE; 2544 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_PENDING; 2545 2546 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) { 2547 /* stats */ 2548 rqi->tm_tag = SNIC_TAG_DEV_RST; 2549 SNIC_SCSI_DBG(snic->shost, "internal_abts:dev rst sc %p\n", sc); 2550 } 2551 2552 SNIC_SCSI_DBG(snic->shost, "internal_abts: Issuing abts tag %x\n", 2553 snic_cmd_tag(sc)); 2554 SNIC_BUG_ON(rqi->abts_done); 2555 spin_unlock_irqrestore(io_lock, flags); 2556 2557 ret = snic_queue_abort_req(snic, rqi, sc, tmf); 2558 if (ret) { 2559 SNIC_HOST_ERR(snic->shost, 2560 "internal_abts: Tag = %x , Failed w/ err = %d\n", 2561 snic_cmd_tag(sc), ret); 2562 2563 spin_lock_irqsave(io_lock, flags); 2564 2565 if (CMD_STATE(sc) == SNIC_IOREQ_ABTS_PENDING) 2566 CMD_STATE(sc) = sv_state; 2567 2568 goto skip_internal_abts; 2569 } 2570 2571 spin_lock_irqsave(io_lock, flags); 2572 if (CMD_FLAGS(sc) & SNIC_DEVICE_RESET) 2573 CMD_FLAGS(sc) |= SNIC_DEV_RST_TERM_ISSUED; 2574 else 2575 CMD_FLAGS(sc) |= SNIC_IO_INTERNAL_TERM_ISSUED; 2576 2577 ret = SUCCESS; 2578 2579 skip_internal_abts: 2580 SNIC_BUG_ON(!spin_is_locked(io_lock)); 2581 spin_unlock_irqrestore(io_lock, flags); 2582 2583 return ret; 2584 } /* end of snic_internal_abort_io */ 2585 2586 /* 2587 * snic_tgt_scsi_abort_io : called by snic_tgt_del 2588 */ 2589 int 2590 snic_tgt_scsi_abort_io(struct snic_tgt *tgt) 2591 { 2592 struct snic *snic = NULL; 2593 struct scsi_cmnd *sc = NULL; 2594 struct snic_tgt *sc_tgt = NULL; 2595 spinlock_t *io_lock = NULL; 2596 unsigned long flags; 2597 int ret = 0, tag, abt_cnt = 0, tmf = 0; 2598 2599 if (!tgt) 2600 return -1; 2601 2602 snic = shost_priv(snic_tgt_to_shost(tgt)); 2603 SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: Cleaning Pending IOs.\n"); 2604 2605 if (tgt->tdata.typ == SNIC_TGT_DAS) 2606 tmf = SNIC_ITMF_ABTS_TASK; 2607 else 2608 tmf = SNIC_ITMF_ABTS_TASK_TERM; 2609 2610 for (tag = 0; tag < snic->max_tag_id; tag++) { 2611 io_lock = snic_io_lock_tag(snic, tag); 2612 2613 spin_lock_irqsave(io_lock, flags); 2614 sc = scsi_host_find_tag(snic->shost, tag); 2615 if (!sc) { 2616 spin_unlock_irqrestore(io_lock, flags); 2617 2618 continue; 2619 } 2620 2621 sc_tgt = starget_to_tgt(scsi_target(sc->device)); 2622 if (sc_tgt != tgt) { 2623 spin_unlock_irqrestore(io_lock, flags); 2624 2625 continue; 2626 } 2627 spin_unlock_irqrestore(io_lock, flags); 2628 2629 ret = snic_internal_abort_io(snic, sc, tmf); 2630 if (ret < 0) { 2631 SNIC_HOST_ERR(snic->shost, 2632 "tgt_abt_io: Tag %x, Failed w err = %d\n", 2633 tag, ret); 2634 2635 continue; 2636 } 2637 2638 if (ret == SUCCESS) 2639 abt_cnt++; 2640 } 2641 2642 SNIC_SCSI_DBG(snic->shost, "tgt_abt_io: abt_cnt = %d\n", abt_cnt); 2643 2644 return 0; 2645 } /* end of snic_tgt_scsi_abort_io */ 2646