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