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