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 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, 131 DMA_TO_DEVICE); 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 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa, 139 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); 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 = dma_map_single(&fnic->pdev->dev, 345 io_req->sgl_list, 346 sizeof(io_req->sgl_list[0]) * sg_count, 347 DMA_TO_DEVICE); 348 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) { 349 printk(KERN_ERR "DMA mapping failed\n"); 350 return SCSI_MLQUEUE_HOST_BUSY; 351 } 352 } 353 354 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev, 355 sc->sense_buffer, 356 SCSI_SENSE_BUFFERSIZE, 357 DMA_FROM_DEVICE); 358 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) { 359 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 360 sizeof(io_req->sgl_list[0]) * sg_count, 361 DMA_TO_DEVICE); 362 printk(KERN_ERR "DMA mapping failed\n"); 363 return SCSI_MLQUEUE_HOST_BUSY; 364 } 365 366 int_to_scsilun(sc->device->lun, &fc_lun); 367 368 /* Enqueue the descriptor in the Copy WQ */ 369 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 370 371 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 372 free_wq_copy_descs(fnic, wq); 373 374 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 375 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 376 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 377 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 378 atomic64_inc(&misc_stats->io_cpwq_alloc_failures); 379 return SCSI_MLQUEUE_HOST_BUSY; 380 } 381 382 flags = 0; 383 if (sc->sc_data_direction == DMA_FROM_DEVICE) 384 flags = FCPIO_ICMND_RDDATA; 385 else if (sc->sc_data_direction == DMA_TO_DEVICE) 386 flags = FCPIO_ICMND_WRDATA; 387 388 exch_flags = 0; 389 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 390 (rp->flags & FC_RP_FLAGS_RETRY)) 391 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 392 393 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, 394 0, exch_flags, io_req->sgl_cnt, 395 SCSI_SENSE_BUFFERSIZE, 396 io_req->sgl_list_pa, 397 io_req->sense_buf_pa, 398 0, /* scsi cmd ref, always 0 */ 399 FCPIO_ICMND_PTA_SIMPLE, 400 /* scsi pri and tag */ 401 flags, /* command flags */ 402 sc->cmnd, sc->cmd_len, 403 scsi_bufflen(sc), 404 fc_lun.scsi_lun, io_req->port_id, 405 rport->maxframe_size, rp->r_a_tov, 406 rp->e_d_tov); 407 408 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 409 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 410 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 411 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 412 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 413 414 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 415 return 0; 416 } 417 418 /* 419 * fnic_queuecommand 420 * Routine to send a scsi cdb 421 * Called with host_lock held and interrupts disabled. 422 */ 423 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) 424 { 425 struct fc_lport *lp = shost_priv(sc->device->host); 426 struct fc_rport *rport; 427 struct fnic_io_req *io_req = NULL; 428 struct fnic *fnic = lport_priv(lp); 429 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 430 struct vnic_wq_copy *wq; 431 int ret; 432 u64 cmd_trace; 433 int sg_count = 0; 434 unsigned long flags = 0; 435 unsigned long ptr; 436 spinlock_t *io_lock = NULL; 437 int io_lock_acquired = 0; 438 struct fc_rport_libfc_priv *rp; 439 440 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 441 return SCSI_MLQUEUE_HOST_BUSY; 442 443 rport = starget_to_rport(scsi_target(sc->device)); 444 if (!rport) { 445 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 446 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 447 sc->result = DID_NO_CONNECT << 16; 448 done(sc); 449 return 0; 450 } 451 452 ret = fc_remote_port_chkready(rport); 453 if (ret) { 454 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 455 "rport is not ready\n"); 456 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 457 sc->result = ret; 458 done(sc); 459 return 0; 460 } 461 462 rp = rport->dd_data; 463 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 464 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 465 "rport 0x%x removed, returning DID_NO_CONNECT\n", 466 rport->port_id); 467 468 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 469 sc->result = DID_NO_CONNECT<<16; 470 done(sc); 471 return 0; 472 } 473 474 if (rp->rp_state != RPORT_ST_READY) { 475 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 476 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 477 rport->port_id, rp->rp_state); 478 479 sc->result = DID_IMM_RETRY << 16; 480 done(sc); 481 return 0; 482 } 483 484 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 485 return SCSI_MLQUEUE_HOST_BUSY; 486 487 atomic_inc(&fnic->in_flight); 488 489 /* 490 * Release host lock, use driver resource specific locks from here. 491 * Don't re-enable interrupts in case they were disabled prior to the 492 * caller disabling them. 493 */ 494 spin_unlock(lp->host->host_lock); 495 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 496 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 497 498 /* Get a new io_req for this SCSI IO */ 499 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 500 if (!io_req) { 501 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 502 ret = SCSI_MLQUEUE_HOST_BUSY; 503 goto out; 504 } 505 memset(io_req, 0, sizeof(*io_req)); 506 507 /* Map the data buffer */ 508 sg_count = scsi_dma_map(sc); 509 if (sg_count < 0) { 510 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 511 sc->request->tag, sc, 0, sc->cmnd[0], 512 sg_count, CMD_STATE(sc)); 513 mempool_free(io_req, fnic->io_req_pool); 514 goto out; 515 } 516 517 /* Determine the type of scatter/gather list we need */ 518 io_req->sgl_cnt = sg_count; 519 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 520 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 521 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 522 523 if (sg_count) { 524 io_req->sgl_list = 525 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 526 GFP_ATOMIC); 527 if (!io_req->sgl_list) { 528 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 529 ret = SCSI_MLQUEUE_HOST_BUSY; 530 scsi_dma_unmap(sc); 531 mempool_free(io_req, fnic->io_req_pool); 532 goto out; 533 } 534 535 /* Cache sgl list allocated address before alignment */ 536 io_req->sgl_list_alloc = io_req->sgl_list; 537 ptr = (unsigned long) io_req->sgl_list; 538 if (ptr % FNIC_SG_DESC_ALIGN) { 539 io_req->sgl_list = (struct host_sg_desc *) 540 (((unsigned long) ptr 541 + FNIC_SG_DESC_ALIGN - 1) 542 & ~(FNIC_SG_DESC_ALIGN - 1)); 543 } 544 } 545 546 /* 547 * Will acquire lock defore setting to IO initialized. 548 */ 549 550 io_lock = fnic_io_lock_hash(fnic, sc); 551 spin_lock_irqsave(io_lock, flags); 552 553 /* initialize rest of io_req */ 554 io_lock_acquired = 1; 555 io_req->port_id = rport->port_id; 556 io_req->start_time = jiffies; 557 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 558 CMD_SP(sc) = (char *)io_req; 559 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; 560 sc->scsi_done = done; 561 562 /* create copy wq desc and enqueue it */ 563 wq = &fnic->wq_copy[0]; 564 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 565 if (ret) { 566 /* 567 * In case another thread cancelled the request, 568 * refetch the pointer under the lock. 569 */ 570 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 571 sc->request->tag, sc, 0, 0, 0, 572 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 573 io_req = (struct fnic_io_req *)CMD_SP(sc); 574 CMD_SP(sc) = NULL; 575 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 576 spin_unlock_irqrestore(io_lock, flags); 577 if (io_req) { 578 fnic_release_ioreq_buf(fnic, io_req, sc); 579 mempool_free(io_req, fnic->io_req_pool); 580 } 581 atomic_dec(&fnic->in_flight); 582 /* acquire host lock before returning to SCSI */ 583 spin_lock(lp->host->host_lock); 584 return ret; 585 } else { 586 atomic64_inc(&fnic_stats->io_stats.active_ios); 587 atomic64_inc(&fnic_stats->io_stats.num_ios); 588 if (atomic64_read(&fnic_stats->io_stats.active_ios) > 589 atomic64_read(&fnic_stats->io_stats.max_active_ios)) 590 atomic64_set(&fnic_stats->io_stats.max_active_ios, 591 atomic64_read(&fnic_stats->io_stats.active_ios)); 592 593 /* REVISIT: Use per IO lock in the final code */ 594 CMD_FLAGS(sc) |= FNIC_IO_ISSUED; 595 } 596 out: 597 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 598 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 599 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 600 sc->cmnd[5]); 601 602 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 603 sc->request->tag, sc, io_req, 604 sg_count, cmd_trace, 605 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); 606 607 /* if only we issued IO, will we have the io lock */ 608 if (io_lock_acquired) 609 spin_unlock_irqrestore(io_lock, flags); 610 611 atomic_dec(&fnic->in_flight); 612 /* acquire host lock before returning to SCSI */ 613 spin_lock(lp->host->host_lock); 614 return ret; 615 } 616 617 DEF_SCSI_QCMD(fnic_queuecommand) 618 619 /* 620 * fnic_fcpio_fw_reset_cmpl_handler 621 * Routine to handle fw reset completion 622 */ 623 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 624 struct fcpio_fw_req *desc) 625 { 626 u8 type; 627 u8 hdr_status; 628 struct fcpio_tag tag; 629 int ret = 0; 630 unsigned long flags; 631 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 632 633 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 634 635 atomic64_inc(&reset_stats->fw_reset_completions); 636 637 /* Clean up all outstanding io requests */ 638 fnic_cleanup_io(fnic, SCSI_NO_TAG); 639 640 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 641 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 642 atomic64_set(&fnic->io_cmpl_skip, 0); 643 644 spin_lock_irqsave(&fnic->fnic_lock, flags); 645 646 /* fnic should be in FC_TRANS_ETH_MODE */ 647 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 648 /* Check status of reset completion */ 649 if (!hdr_status) { 650 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 651 "reset cmpl success\n"); 652 /* Ready to send flogi out */ 653 fnic->state = FNIC_IN_ETH_MODE; 654 } else { 655 FNIC_SCSI_DBG(KERN_DEBUG, 656 fnic->lport->host, 657 "fnic fw_reset : failed %s\n", 658 fnic_fcpio_status_to_str(hdr_status)); 659 660 /* 661 * Unable to change to eth mode, cannot send out flogi 662 * Change state to fc mode, so that subsequent Flogi 663 * requests from libFC will cause more attempts to 664 * reset the firmware. Free the cached flogi 665 */ 666 fnic->state = FNIC_IN_FC_MODE; 667 atomic64_inc(&reset_stats->fw_reset_failures); 668 ret = -1; 669 } 670 } else { 671 FNIC_SCSI_DBG(KERN_DEBUG, 672 fnic->lport->host, 673 "Unexpected state %s while processing" 674 " reset cmpl\n", fnic_state_to_str(fnic->state)); 675 atomic64_inc(&reset_stats->fw_reset_failures); 676 ret = -1; 677 } 678 679 /* Thread removing device blocks till firmware reset is complete */ 680 if (fnic->remove_wait) 681 complete(fnic->remove_wait); 682 683 /* 684 * If fnic is being removed, or fw reset failed 685 * free the flogi frame. Else, send it out 686 */ 687 if (fnic->remove_wait || ret) { 688 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 689 skb_queue_purge(&fnic->tx_queue); 690 goto reset_cmpl_handler_end; 691 } 692 693 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 694 695 fnic_flush_tx(fnic); 696 697 reset_cmpl_handler_end: 698 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 699 700 return ret; 701 } 702 703 /* 704 * fnic_fcpio_flogi_reg_cmpl_handler 705 * Routine to handle flogi register completion 706 */ 707 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 708 struct fcpio_fw_req *desc) 709 { 710 u8 type; 711 u8 hdr_status; 712 struct fcpio_tag tag; 713 int ret = 0; 714 unsigned long flags; 715 716 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 717 718 /* Update fnic state based on status of flogi reg completion */ 719 spin_lock_irqsave(&fnic->fnic_lock, flags); 720 721 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 722 723 /* Check flogi registration completion status */ 724 if (!hdr_status) { 725 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 726 "flog reg succeeded\n"); 727 fnic->state = FNIC_IN_FC_MODE; 728 } else { 729 FNIC_SCSI_DBG(KERN_DEBUG, 730 fnic->lport->host, 731 "fnic flogi reg :failed %s\n", 732 fnic_fcpio_status_to_str(hdr_status)); 733 fnic->state = FNIC_IN_ETH_MODE; 734 ret = -1; 735 } 736 } else { 737 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 738 "Unexpected fnic state %s while" 739 " processing flogi reg completion\n", 740 fnic_state_to_str(fnic->state)); 741 ret = -1; 742 } 743 744 if (!ret) { 745 if (fnic->stop_rx_link_events) { 746 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 747 goto reg_cmpl_handler_end; 748 } 749 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 750 751 fnic_flush_tx(fnic); 752 queue_work(fnic_event_queue, &fnic->frame_work); 753 } else { 754 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 755 } 756 757 reg_cmpl_handler_end: 758 return ret; 759 } 760 761 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 762 u16 request_out) 763 { 764 if (wq->to_clean_index <= wq->to_use_index) { 765 /* out of range, stale request_out index */ 766 if (request_out < wq->to_clean_index || 767 request_out >= wq->to_use_index) 768 return 0; 769 } else { 770 /* out of range, stale request_out index */ 771 if (request_out < wq->to_clean_index && 772 request_out >= wq->to_use_index) 773 return 0; 774 } 775 /* request_out index is in range */ 776 return 1; 777 } 778 779 780 /* 781 * Mark that ack received and store the Ack index. If there are multiple 782 * acks received before Tx thread cleans it up, the latest value will be 783 * used which is correct behavior. This state should be in the copy Wq 784 * instead of in the fnic 785 */ 786 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 787 unsigned int cq_index, 788 struct fcpio_fw_req *desc) 789 { 790 struct vnic_wq_copy *wq; 791 u16 request_out = desc->u.ack.request_out; 792 unsigned long flags; 793 u64 *ox_id_tag = (u64 *)(void *)desc; 794 795 /* mark the ack state */ 796 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 797 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 798 799 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 800 if (is_ack_index_in_range(wq, request_out)) { 801 fnic->fw_ack_index[0] = request_out; 802 fnic->fw_ack_recd[0] = 1; 803 } else 804 atomic64_inc( 805 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 806 807 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 808 FNIC_TRACE(fnic_fcpio_ack_handler, 809 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 810 ox_id_tag[4], ox_id_tag[5]); 811 } 812 813 /* 814 * fnic_fcpio_icmnd_cmpl_handler 815 * Routine to handle icmnd completions 816 */ 817 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 818 struct fcpio_fw_req *desc) 819 { 820 u8 type; 821 u8 hdr_status; 822 struct fcpio_tag tag; 823 u32 id; 824 u64 xfer_len = 0; 825 struct fcpio_icmnd_cmpl *icmnd_cmpl; 826 struct fnic_io_req *io_req; 827 struct scsi_cmnd *sc; 828 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 829 unsigned long flags; 830 spinlock_t *io_lock; 831 u64 cmd_trace; 832 unsigned long start_time; 833 unsigned long io_duration_time; 834 835 /* Decode the cmpl description to get the io_req id */ 836 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 837 fcpio_tag_id_dec(&tag, &id); 838 icmnd_cmpl = &desc->u.icmnd_cmpl; 839 840 if (id >= fnic->fnic_max_tag_id) { 841 shost_printk(KERN_ERR, fnic->lport->host, 842 "Tag out of range tag %x hdr status = %s\n", 843 id, fnic_fcpio_status_to_str(hdr_status)); 844 return; 845 } 846 847 sc = scsi_host_find_tag(fnic->lport->host, id); 848 WARN_ON_ONCE(!sc); 849 if (!sc) { 850 atomic64_inc(&fnic_stats->io_stats.sc_null); 851 shost_printk(KERN_ERR, fnic->lport->host, 852 "icmnd_cmpl sc is null - " 853 "hdr status = %s tag = 0x%x desc = 0x%p\n", 854 fnic_fcpio_status_to_str(hdr_status), id, desc); 855 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 856 fnic->lport->host->host_no, id, 857 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 858 (u64)icmnd_cmpl->_resvd0[0]), 859 ((u64)hdr_status << 16 | 860 (u64)icmnd_cmpl->scsi_status << 8 | 861 (u64)icmnd_cmpl->flags), desc, 862 (u64)icmnd_cmpl->residual, 0); 863 return; 864 } 865 866 io_lock = fnic_io_lock_hash(fnic, sc); 867 spin_lock_irqsave(io_lock, flags); 868 io_req = (struct fnic_io_req *)CMD_SP(sc); 869 WARN_ON_ONCE(!io_req); 870 if (!io_req) { 871 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 872 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; 873 spin_unlock_irqrestore(io_lock, flags); 874 shost_printk(KERN_ERR, fnic->lport->host, 875 "icmnd_cmpl io_req is null - " 876 "hdr status = %s tag = 0x%x sc 0x%p\n", 877 fnic_fcpio_status_to_str(hdr_status), id, sc); 878 return; 879 } 880 start_time = io_req->start_time; 881 882 /* firmware completed the io */ 883 io_req->io_completed = 1; 884 885 /* 886 * if SCSI-ML has already issued abort on this command, 887 * set completion of the IO. The abts path will clean it up 888 */ 889 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 890 891 /* 892 * set the FNIC_IO_DONE so that this doesn't get 893 * flagged as 'out of order' if it was not aborted 894 */ 895 CMD_FLAGS(sc) |= FNIC_IO_DONE; 896 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 897 spin_unlock_irqrestore(io_lock, flags); 898 if(FCPIO_ABORTED == hdr_status) 899 CMD_FLAGS(sc) |= FNIC_IO_ABORTED; 900 901 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 902 "icmnd_cmpl abts pending " 903 "hdr status = %s tag = 0x%x sc = 0x%p " 904 "scsi_status = %x residual = %d\n", 905 fnic_fcpio_status_to_str(hdr_status), 906 id, sc, 907 icmnd_cmpl->scsi_status, 908 icmnd_cmpl->residual); 909 return; 910 } 911 912 /* Mark the IO as complete */ 913 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 914 915 icmnd_cmpl = &desc->u.icmnd_cmpl; 916 917 switch (hdr_status) { 918 case FCPIO_SUCCESS: 919 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 920 xfer_len = scsi_bufflen(sc); 921 scsi_set_resid(sc, icmnd_cmpl->residual); 922 923 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) 924 xfer_len -= icmnd_cmpl->residual; 925 926 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) 927 atomic64_inc(&fnic_stats->misc_stats.check_condition); 928 929 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 930 atomic64_inc(&fnic_stats->misc_stats.queue_fulls); 931 break; 932 933 case FCPIO_TIMEOUT: /* request was timed out */ 934 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); 935 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 936 break; 937 938 case FCPIO_ABORTED: /* request was aborted */ 939 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); 940 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 941 break; 942 943 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 944 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); 945 scsi_set_resid(sc, icmnd_cmpl->residual); 946 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 947 break; 948 949 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 950 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); 951 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 952 break; 953 954 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 955 atomic64_inc(&fnic_stats->io_stats.io_not_found); 956 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 957 break; 958 959 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 960 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); 961 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 962 break; 963 964 case FCPIO_FW_ERR: /* request was terminated due fw error */ 965 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); 966 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 967 break; 968 969 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 970 atomic64_inc(&fnic_stats->misc_stats.mss_invalid); 971 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 972 break; 973 974 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 975 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 976 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 977 default: 978 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 979 break; 980 } 981 982 /* Break link with the SCSI command */ 983 CMD_SP(sc) = NULL; 984 CMD_FLAGS(sc) |= FNIC_IO_DONE; 985 986 spin_unlock_irqrestore(io_lock, flags); 987 988 if (hdr_status != FCPIO_SUCCESS) { 989 atomic64_inc(&fnic_stats->io_stats.io_failures); 990 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 991 fnic_fcpio_status_to_str(hdr_status)); 992 } 993 994 fnic_release_ioreq_buf(fnic, io_req, sc); 995 996 mempool_free(io_req, fnic->io_req_pool); 997 998 cmd_trace = ((u64)hdr_status << 56) | 999 (u64)icmnd_cmpl->scsi_status << 48 | 1000 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 1001 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1002 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 1003 1004 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 1005 sc->device->host->host_no, id, sc, 1006 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1007 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1008 jiffies_to_msecs(jiffies - start_time)), 1009 desc, cmd_trace, 1010 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1011 1012 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1013 fnic->lport->host_stats.fcp_input_requests++; 1014 fnic->fcp_input_bytes += xfer_len; 1015 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1016 fnic->lport->host_stats.fcp_output_requests++; 1017 fnic->fcp_output_bytes += xfer_len; 1018 } else 1019 fnic->lport->host_stats.fcp_control_requests++; 1020 1021 atomic64_dec(&fnic_stats->io_stats.active_ios); 1022 if (atomic64_read(&fnic->io_cmpl_skip)) 1023 atomic64_dec(&fnic->io_cmpl_skip); 1024 else 1025 atomic64_inc(&fnic_stats->io_stats.io_completions); 1026 1027 1028 io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1029 1030 if(io_duration_time <= 10) 1031 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1032 else if(io_duration_time <= 100) 1033 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1034 else if(io_duration_time <= 500) 1035 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1036 else if(io_duration_time <= 5000) 1037 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1038 else if(io_duration_time <= 10000) 1039 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1040 else if(io_duration_time <= 30000) 1041 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1042 else { 1043 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1044 1045 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1046 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1047 } 1048 1049 /* Call SCSI completion function to complete the IO */ 1050 if (sc->scsi_done) 1051 sc->scsi_done(sc); 1052 } 1053 1054 /* fnic_fcpio_itmf_cmpl_handler 1055 * Routine to handle itmf completions 1056 */ 1057 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1058 struct fcpio_fw_req *desc) 1059 { 1060 u8 type; 1061 u8 hdr_status; 1062 struct fcpio_tag tag; 1063 u32 id; 1064 struct scsi_cmnd *sc; 1065 struct fnic_io_req *io_req; 1066 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1067 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1068 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1069 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1070 unsigned long flags; 1071 spinlock_t *io_lock; 1072 unsigned long start_time; 1073 1074 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1075 fcpio_tag_id_dec(&tag, &id); 1076 1077 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1078 shost_printk(KERN_ERR, fnic->lport->host, 1079 "Tag out of range tag %x hdr status = %s\n", 1080 id, fnic_fcpio_status_to_str(hdr_status)); 1081 return; 1082 } 1083 1084 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1085 WARN_ON_ONCE(!sc); 1086 if (!sc) { 1087 atomic64_inc(&fnic_stats->io_stats.sc_null); 1088 shost_printk(KERN_ERR, fnic->lport->host, 1089 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1090 fnic_fcpio_status_to_str(hdr_status), id); 1091 return; 1092 } 1093 io_lock = fnic_io_lock_hash(fnic, sc); 1094 spin_lock_irqsave(io_lock, flags); 1095 io_req = (struct fnic_io_req *)CMD_SP(sc); 1096 WARN_ON_ONCE(!io_req); 1097 if (!io_req) { 1098 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1099 spin_unlock_irqrestore(io_lock, flags); 1100 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1101 shost_printk(KERN_ERR, fnic->lport->host, 1102 "itmf_cmpl io_req is null - " 1103 "hdr status = %s tag = 0x%x sc 0x%p\n", 1104 fnic_fcpio_status_to_str(hdr_status), id, sc); 1105 return; 1106 } 1107 start_time = io_req->start_time; 1108 1109 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1110 /* Abort and terminate completion of device reset req */ 1111 /* REVISIT : Add asserts about various flags */ 1112 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1113 "dev reset abts cmpl recd. id %x status %s\n", 1114 id, fnic_fcpio_status_to_str(hdr_status)); 1115 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1116 CMD_ABTS_STATUS(sc) = hdr_status; 1117 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1118 if (io_req->abts_done) 1119 complete(io_req->abts_done); 1120 spin_unlock_irqrestore(io_lock, flags); 1121 } else if (id & FNIC_TAG_ABORT) { 1122 /* Completion of abort cmd */ 1123 switch (hdr_status) { 1124 case FCPIO_SUCCESS: 1125 break; 1126 case FCPIO_TIMEOUT: 1127 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1128 atomic64_inc(&abts_stats->abort_fw_timeouts); 1129 else 1130 atomic64_inc( 1131 &term_stats->terminate_fw_timeouts); 1132 break; 1133 case FCPIO_ITMF_REJECTED: 1134 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1135 "abort reject recd. id %d\n", 1136 (int)(id & FNIC_TAG_MASK)); 1137 break; 1138 case FCPIO_IO_NOT_FOUND: 1139 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1140 atomic64_inc(&abts_stats->abort_io_not_found); 1141 else 1142 atomic64_inc( 1143 &term_stats->terminate_io_not_found); 1144 break; 1145 default: 1146 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1147 atomic64_inc(&abts_stats->abort_failures); 1148 else 1149 atomic64_inc( 1150 &term_stats->terminate_failures); 1151 break; 1152 } 1153 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 1154 /* This is a late completion. Ignore it */ 1155 spin_unlock_irqrestore(io_lock, flags); 1156 return; 1157 } 1158 1159 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1160 CMD_ABTS_STATUS(sc) = hdr_status; 1161 1162 /* If the status is IO not found consider it as success */ 1163 if (hdr_status == FCPIO_IO_NOT_FOUND) 1164 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; 1165 1166 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1167 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1168 1169 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1170 "abts cmpl recd. id %d status %s\n", 1171 (int)(id & FNIC_TAG_MASK), 1172 fnic_fcpio_status_to_str(hdr_status)); 1173 1174 /* 1175 * If scsi_eh thread is blocked waiting for abts to complete, 1176 * signal completion to it. IO will be cleaned in the thread 1177 * else clean it in this context 1178 */ 1179 if (io_req->abts_done) { 1180 complete(io_req->abts_done); 1181 spin_unlock_irqrestore(io_lock, flags); 1182 } else { 1183 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1184 "abts cmpl, completing IO\n"); 1185 CMD_SP(sc) = NULL; 1186 sc->result = (DID_ERROR << 16); 1187 1188 spin_unlock_irqrestore(io_lock, flags); 1189 1190 fnic_release_ioreq_buf(fnic, io_req, sc); 1191 mempool_free(io_req, fnic->io_req_pool); 1192 if (sc->scsi_done) { 1193 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1194 sc->device->host->host_no, id, 1195 sc, 1196 jiffies_to_msecs(jiffies - start_time), 1197 desc, 1198 (((u64)hdr_status << 40) | 1199 (u64)sc->cmnd[0] << 32 | 1200 (u64)sc->cmnd[2] << 24 | 1201 (u64)sc->cmnd[3] << 16 | 1202 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1203 (((u64)CMD_FLAGS(sc) << 32) | 1204 CMD_STATE(sc))); 1205 sc->scsi_done(sc); 1206 atomic64_dec(&fnic_stats->io_stats.active_ios); 1207 if (atomic64_read(&fnic->io_cmpl_skip)) 1208 atomic64_dec(&fnic->io_cmpl_skip); 1209 else 1210 atomic64_inc(&fnic_stats->io_stats.io_completions); 1211 } 1212 } 1213 1214 } else if (id & FNIC_TAG_DEV_RST) { 1215 /* Completion of device reset */ 1216 CMD_LR_STATUS(sc) = hdr_status; 1217 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1218 spin_unlock_irqrestore(io_lock, flags); 1219 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1220 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1221 sc->device->host->host_no, id, sc, 1222 jiffies_to_msecs(jiffies - start_time), 1223 desc, 0, 1224 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1225 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1226 "Terminate pending " 1227 "dev reset cmpl recd. id %d status %s\n", 1228 (int)(id & FNIC_TAG_MASK), 1229 fnic_fcpio_status_to_str(hdr_status)); 1230 return; 1231 } 1232 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1233 /* Need to wait for terminate completion */ 1234 spin_unlock_irqrestore(io_lock, flags); 1235 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1236 sc->device->host->host_no, id, sc, 1237 jiffies_to_msecs(jiffies - start_time), 1238 desc, 0, 1239 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1240 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1241 "dev reset cmpl recd after time out. " 1242 "id %d status %s\n", 1243 (int)(id & FNIC_TAG_MASK), 1244 fnic_fcpio_status_to_str(hdr_status)); 1245 return; 1246 } 1247 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1248 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1249 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1250 "dev reset cmpl recd. id %d status %s\n", 1251 (int)(id & FNIC_TAG_MASK), 1252 fnic_fcpio_status_to_str(hdr_status)); 1253 if (io_req->dr_done) 1254 complete(io_req->dr_done); 1255 spin_unlock_irqrestore(io_lock, flags); 1256 1257 } else { 1258 shost_printk(KERN_ERR, fnic->lport->host, 1259 "Unexpected itmf io state %s tag %x\n", 1260 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1261 spin_unlock_irqrestore(io_lock, flags); 1262 } 1263 1264 } 1265 1266 /* 1267 * fnic_fcpio_cmpl_handler 1268 * Routine to service the cq for wq_copy 1269 */ 1270 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1271 unsigned int cq_index, 1272 struct fcpio_fw_req *desc) 1273 { 1274 struct fnic *fnic = vnic_dev_priv(vdev); 1275 1276 switch (desc->hdr.type) { 1277 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1278 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1279 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1280 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1281 case FCPIO_RESET_CMPL: /* fw completed reset */ 1282 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1283 break; 1284 default: 1285 break; 1286 } 1287 1288 switch (desc->hdr.type) { 1289 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1290 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1291 break; 1292 1293 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1294 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1295 break; 1296 1297 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1298 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1299 break; 1300 1301 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1302 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1303 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1304 break; 1305 1306 case FCPIO_RESET_CMPL: /* fw completed reset */ 1307 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1308 break; 1309 1310 default: 1311 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1312 "firmware completion type %d\n", 1313 desc->hdr.type); 1314 break; 1315 } 1316 1317 return 0; 1318 } 1319 1320 /* 1321 * fnic_wq_copy_cmpl_handler 1322 * Routine to process wq copy 1323 */ 1324 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1325 { 1326 unsigned int wq_work_done = 0; 1327 unsigned int i, cq_index; 1328 unsigned int cur_work_done; 1329 1330 for (i = 0; i < fnic->wq_copy_count; i++) { 1331 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1332 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1333 fnic_fcpio_cmpl_handler, 1334 copy_work_to_do); 1335 wq_work_done += cur_work_done; 1336 } 1337 return wq_work_done; 1338 } 1339 1340 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) 1341 { 1342 int i; 1343 struct fnic_io_req *io_req; 1344 unsigned long flags = 0; 1345 struct scsi_cmnd *sc; 1346 spinlock_t *io_lock; 1347 unsigned long start_time = 0; 1348 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1349 1350 for (i = 0; i < fnic->fnic_max_tag_id; i++) { 1351 if (i == exclude_id) 1352 continue; 1353 1354 io_lock = fnic_io_lock_tag(fnic, i); 1355 spin_lock_irqsave(io_lock, flags); 1356 sc = scsi_host_find_tag(fnic->lport->host, i); 1357 if (!sc) { 1358 spin_unlock_irqrestore(io_lock, flags); 1359 continue; 1360 } 1361 1362 io_req = (struct fnic_io_req *)CMD_SP(sc); 1363 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1364 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1365 /* 1366 * We will be here only when FW completes reset 1367 * without sending completions for outstanding ios. 1368 */ 1369 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1370 if (io_req && io_req->dr_done) 1371 complete(io_req->dr_done); 1372 else if (io_req && io_req->abts_done) 1373 complete(io_req->abts_done); 1374 spin_unlock_irqrestore(io_lock, flags); 1375 continue; 1376 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1377 spin_unlock_irqrestore(io_lock, flags); 1378 continue; 1379 } 1380 if (!io_req) { 1381 spin_unlock_irqrestore(io_lock, flags); 1382 goto cleanup_scsi_cmd; 1383 } 1384 1385 CMD_SP(sc) = NULL; 1386 1387 spin_unlock_irqrestore(io_lock, flags); 1388 1389 /* 1390 * If there is a scsi_cmnd associated with this io_req, then 1391 * free the corresponding state 1392 */ 1393 start_time = io_req->start_time; 1394 fnic_release_ioreq_buf(fnic, io_req, sc); 1395 mempool_free(io_req, fnic->io_req_pool); 1396 1397 cleanup_scsi_cmd: 1398 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1399 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1400 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n", 1401 __func__, (jiffies - start_time)); 1402 1403 if (atomic64_read(&fnic->io_cmpl_skip)) 1404 atomic64_dec(&fnic->io_cmpl_skip); 1405 else 1406 atomic64_inc(&fnic_stats->io_stats.io_completions); 1407 1408 /* Complete the command to SCSI */ 1409 if (sc->scsi_done) { 1410 FNIC_TRACE(fnic_cleanup_io, 1411 sc->device->host->host_no, i, sc, 1412 jiffies_to_msecs(jiffies - start_time), 1413 0, ((u64)sc->cmnd[0] << 32 | 1414 (u64)sc->cmnd[2] << 24 | 1415 (u64)sc->cmnd[3] << 16 | 1416 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1417 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1418 1419 sc->scsi_done(sc); 1420 } 1421 } 1422 } 1423 1424 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1425 struct fcpio_host_req *desc) 1426 { 1427 u32 id; 1428 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1429 struct fnic_io_req *io_req; 1430 struct scsi_cmnd *sc; 1431 unsigned long flags; 1432 spinlock_t *io_lock; 1433 unsigned long start_time = 0; 1434 1435 /* get the tag reference */ 1436 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1437 id &= FNIC_TAG_MASK; 1438 1439 if (id >= fnic->fnic_max_tag_id) 1440 return; 1441 1442 sc = scsi_host_find_tag(fnic->lport->host, id); 1443 if (!sc) 1444 return; 1445 1446 io_lock = fnic_io_lock_hash(fnic, sc); 1447 spin_lock_irqsave(io_lock, flags); 1448 1449 /* Get the IO context which this desc refers to */ 1450 io_req = (struct fnic_io_req *)CMD_SP(sc); 1451 1452 /* fnic interrupts are turned off by now */ 1453 1454 if (!io_req) { 1455 spin_unlock_irqrestore(io_lock, flags); 1456 goto wq_copy_cleanup_scsi_cmd; 1457 } 1458 1459 CMD_SP(sc) = NULL; 1460 1461 spin_unlock_irqrestore(io_lock, flags); 1462 1463 start_time = io_req->start_time; 1464 fnic_release_ioreq_buf(fnic, io_req, sc); 1465 mempool_free(io_req, fnic->io_req_pool); 1466 1467 wq_copy_cleanup_scsi_cmd: 1468 sc->result = DID_NO_CONNECT << 16; 1469 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1470 " DID_NO_CONNECT\n"); 1471 1472 if (sc->scsi_done) { 1473 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1474 sc->device->host->host_no, id, sc, 1475 jiffies_to_msecs(jiffies - start_time), 1476 0, ((u64)sc->cmnd[0] << 32 | 1477 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1478 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1479 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1480 1481 sc->scsi_done(sc); 1482 } 1483 } 1484 1485 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1486 u32 task_req, u8 *fc_lun, 1487 struct fnic_io_req *io_req) 1488 { 1489 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1490 struct Scsi_Host *host = fnic->lport->host; 1491 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1492 unsigned long flags; 1493 1494 spin_lock_irqsave(host->host_lock, flags); 1495 if (unlikely(fnic_chk_state_flags_locked(fnic, 1496 FNIC_FLAGS_IO_BLOCKED))) { 1497 spin_unlock_irqrestore(host->host_lock, flags); 1498 return 1; 1499 } else 1500 atomic_inc(&fnic->in_flight); 1501 spin_unlock_irqrestore(host->host_lock, flags); 1502 1503 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1504 1505 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1506 free_wq_copy_descs(fnic, wq); 1507 1508 if (!vnic_wq_copy_desc_avail(wq)) { 1509 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1510 atomic_dec(&fnic->in_flight); 1511 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1512 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1513 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1514 return 1; 1515 } 1516 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1517 0, task_req, tag, fc_lun, io_req->port_id, 1518 fnic->config.ra_tov, fnic->config.ed_tov); 1519 1520 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1521 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1522 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1523 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1524 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1525 1526 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1527 atomic_dec(&fnic->in_flight); 1528 1529 return 0; 1530 } 1531 1532 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1533 { 1534 int tag; 1535 int abt_tag; 1536 int term_cnt = 0; 1537 struct fnic_io_req *io_req; 1538 spinlock_t *io_lock; 1539 unsigned long flags; 1540 struct scsi_cmnd *sc; 1541 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1542 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1543 struct scsi_lun fc_lun; 1544 enum fnic_ioreq_state old_ioreq_state; 1545 1546 FNIC_SCSI_DBG(KERN_DEBUG, 1547 fnic->lport->host, 1548 "fnic_rport_exch_reset called portid 0x%06x\n", 1549 port_id); 1550 1551 if (fnic->in_remove) 1552 return; 1553 1554 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1555 abt_tag = tag; 1556 io_lock = fnic_io_lock_tag(fnic, tag); 1557 spin_lock_irqsave(io_lock, flags); 1558 sc = scsi_host_find_tag(fnic->lport->host, tag); 1559 if (!sc) { 1560 spin_unlock_irqrestore(io_lock, flags); 1561 continue; 1562 } 1563 1564 io_req = (struct fnic_io_req *)CMD_SP(sc); 1565 1566 if (!io_req || io_req->port_id != port_id) { 1567 spin_unlock_irqrestore(io_lock, flags); 1568 continue; 1569 } 1570 1571 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1572 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1573 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1574 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1575 sc); 1576 spin_unlock_irqrestore(io_lock, flags); 1577 continue; 1578 } 1579 1580 /* 1581 * Found IO that is still pending with firmware and 1582 * belongs to rport that went away 1583 */ 1584 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1585 spin_unlock_irqrestore(io_lock, flags); 1586 continue; 1587 } 1588 if (io_req->abts_done) { 1589 shost_printk(KERN_ERR, fnic->lport->host, 1590 "fnic_rport_exch_reset: io_req->abts_done is set " 1591 "state is %s\n", 1592 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1593 } 1594 1595 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1596 shost_printk(KERN_ERR, fnic->lport->host, 1597 "rport_exch_reset " 1598 "IO not yet issued %p tag 0x%x flags " 1599 "%x state %d\n", 1600 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1601 } 1602 old_ioreq_state = CMD_STATE(sc); 1603 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1604 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1605 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1606 atomic64_inc(&reset_stats->device_reset_terminates); 1607 abt_tag = (tag | FNIC_TAG_DEV_RST); 1608 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1609 "fnic_rport_exch_reset dev rst sc 0x%p\n", 1610 sc); 1611 } 1612 1613 BUG_ON(io_req->abts_done); 1614 1615 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1616 "fnic_rport_reset_exch: Issuing abts\n"); 1617 1618 spin_unlock_irqrestore(io_lock, flags); 1619 1620 /* Now queue the abort command to firmware */ 1621 int_to_scsilun(sc->device->lun, &fc_lun); 1622 1623 if (fnic_queue_abort_io_req(fnic, abt_tag, 1624 FCPIO_ITMF_ABT_TASK_TERM, 1625 fc_lun.scsi_lun, io_req)) { 1626 /* 1627 * Revert the cmd state back to old state, if 1628 * it hasn't changed in between. This cmd will get 1629 * aborted later by scsi_eh, or cleaned up during 1630 * lun reset 1631 */ 1632 spin_lock_irqsave(io_lock, flags); 1633 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1634 CMD_STATE(sc) = old_ioreq_state; 1635 spin_unlock_irqrestore(io_lock, flags); 1636 } else { 1637 spin_lock_irqsave(io_lock, flags); 1638 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1639 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1640 else 1641 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1642 spin_unlock_irqrestore(io_lock, flags); 1643 atomic64_inc(&term_stats->terminates); 1644 term_cnt++; 1645 } 1646 } 1647 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1648 atomic64_set(&term_stats->max_terminates, term_cnt); 1649 1650 } 1651 1652 void fnic_terminate_rport_io(struct fc_rport *rport) 1653 { 1654 int tag; 1655 int abt_tag; 1656 int term_cnt = 0; 1657 struct fnic_io_req *io_req; 1658 spinlock_t *io_lock; 1659 unsigned long flags; 1660 struct scsi_cmnd *sc; 1661 struct scsi_lun fc_lun; 1662 struct fc_rport_libfc_priv *rdata; 1663 struct fc_lport *lport; 1664 struct fnic *fnic; 1665 struct fc_rport *cmd_rport; 1666 struct reset_stats *reset_stats; 1667 struct terminate_stats *term_stats; 1668 enum fnic_ioreq_state old_ioreq_state; 1669 1670 if (!rport) { 1671 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1672 return; 1673 } 1674 rdata = rport->dd_data; 1675 1676 if (!rdata) { 1677 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1678 return; 1679 } 1680 lport = rdata->local_port; 1681 1682 if (!lport) { 1683 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1684 return; 1685 } 1686 fnic = lport_priv(lport); 1687 FNIC_SCSI_DBG(KERN_DEBUG, 1688 fnic->lport->host, "fnic_terminate_rport_io called" 1689 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1690 rport->port_name, rport->node_name, rport, 1691 rport->port_id); 1692 1693 if (fnic->in_remove) 1694 return; 1695 1696 reset_stats = &fnic->fnic_stats.reset_stats; 1697 term_stats = &fnic->fnic_stats.term_stats; 1698 1699 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1700 abt_tag = tag; 1701 io_lock = fnic_io_lock_tag(fnic, tag); 1702 spin_lock_irqsave(io_lock, flags); 1703 sc = scsi_host_find_tag(fnic->lport->host, tag); 1704 if (!sc) { 1705 spin_unlock_irqrestore(io_lock, flags); 1706 continue; 1707 } 1708 1709 cmd_rport = starget_to_rport(scsi_target(sc->device)); 1710 if (rport != cmd_rport) { 1711 spin_unlock_irqrestore(io_lock, flags); 1712 continue; 1713 } 1714 1715 io_req = (struct fnic_io_req *)CMD_SP(sc); 1716 1717 if (!io_req || rport != cmd_rport) { 1718 spin_unlock_irqrestore(io_lock, flags); 1719 continue; 1720 } 1721 1722 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1723 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1724 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1725 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", 1726 sc); 1727 spin_unlock_irqrestore(io_lock, flags); 1728 continue; 1729 } 1730 /* 1731 * Found IO that is still pending with firmware and 1732 * belongs to rport that went away 1733 */ 1734 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1735 spin_unlock_irqrestore(io_lock, flags); 1736 continue; 1737 } 1738 if (io_req->abts_done) { 1739 shost_printk(KERN_ERR, fnic->lport->host, 1740 "fnic_terminate_rport_io: io_req->abts_done is set " 1741 "state is %s\n", 1742 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1743 } 1744 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1745 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1746 "fnic_terminate_rport_io " 1747 "IO not yet issued %p tag 0x%x flags " 1748 "%x state %d\n", 1749 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1750 } 1751 old_ioreq_state = CMD_STATE(sc); 1752 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1753 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1754 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1755 atomic64_inc(&reset_stats->device_reset_terminates); 1756 abt_tag = (tag | FNIC_TAG_DEV_RST); 1757 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1758 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); 1759 } 1760 1761 BUG_ON(io_req->abts_done); 1762 1763 FNIC_SCSI_DBG(KERN_DEBUG, 1764 fnic->lport->host, 1765 "fnic_terminate_rport_io: Issuing abts\n"); 1766 1767 spin_unlock_irqrestore(io_lock, flags); 1768 1769 /* Now queue the abort command to firmware */ 1770 int_to_scsilun(sc->device->lun, &fc_lun); 1771 1772 if (fnic_queue_abort_io_req(fnic, abt_tag, 1773 FCPIO_ITMF_ABT_TASK_TERM, 1774 fc_lun.scsi_lun, io_req)) { 1775 /* 1776 * Revert the cmd state back to old state, if 1777 * it hasn't changed in between. This cmd will get 1778 * aborted later by scsi_eh, or cleaned up during 1779 * lun reset 1780 */ 1781 spin_lock_irqsave(io_lock, flags); 1782 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1783 CMD_STATE(sc) = old_ioreq_state; 1784 spin_unlock_irqrestore(io_lock, flags); 1785 } else { 1786 spin_lock_irqsave(io_lock, flags); 1787 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1788 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1789 else 1790 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1791 spin_unlock_irqrestore(io_lock, flags); 1792 atomic64_inc(&term_stats->terminates); 1793 term_cnt++; 1794 } 1795 } 1796 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1797 atomic64_set(&term_stats->max_terminates, term_cnt); 1798 1799 } 1800 1801 /* 1802 * This function is exported to SCSI for sending abort cmnds. 1803 * A SCSI IO is represented by a io_req in the driver. 1804 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1805 */ 1806 int fnic_abort_cmd(struct scsi_cmnd *sc) 1807 { 1808 struct fc_lport *lp; 1809 struct fnic *fnic; 1810 struct fnic_io_req *io_req = NULL; 1811 struct fc_rport *rport; 1812 spinlock_t *io_lock; 1813 unsigned long flags; 1814 unsigned long start_time = 0; 1815 int ret = SUCCESS; 1816 u32 task_req = 0; 1817 struct scsi_lun fc_lun; 1818 struct fnic_stats *fnic_stats; 1819 struct abort_stats *abts_stats; 1820 struct terminate_stats *term_stats; 1821 enum fnic_ioreq_state old_ioreq_state; 1822 int tag; 1823 unsigned long abt_issued_time; 1824 DECLARE_COMPLETION_ONSTACK(tm_done); 1825 1826 /* Wait for rport to unblock */ 1827 fc_block_scsi_eh(sc); 1828 1829 /* Get local-port, check ready and link up */ 1830 lp = shost_priv(sc->device->host); 1831 1832 fnic = lport_priv(lp); 1833 fnic_stats = &fnic->fnic_stats; 1834 abts_stats = &fnic->fnic_stats.abts_stats; 1835 term_stats = &fnic->fnic_stats.term_stats; 1836 1837 rport = starget_to_rport(scsi_target(sc->device)); 1838 tag = sc->request->tag; 1839 FNIC_SCSI_DBG(KERN_DEBUG, 1840 fnic->lport->host, 1841 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1842 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1843 1844 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1845 1846 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1847 ret = FAILED; 1848 goto fnic_abort_cmd_end; 1849 } 1850 1851 /* 1852 * Avoid a race between SCSI issuing the abort and the device 1853 * completing the command. 1854 * 1855 * If the command is already completed by the fw cmpl code, 1856 * we just return SUCCESS from here. This means that the abort 1857 * succeeded. In the SCSI ML, since the timeout for command has 1858 * happened, the completion wont actually complete the command 1859 * and it will be considered as an aborted command 1860 * 1861 * The CMD_SP will not be cleared except while holding io_req_lock. 1862 */ 1863 io_lock = fnic_io_lock_hash(fnic, sc); 1864 spin_lock_irqsave(io_lock, flags); 1865 io_req = (struct fnic_io_req *)CMD_SP(sc); 1866 if (!io_req) { 1867 spin_unlock_irqrestore(io_lock, flags); 1868 goto fnic_abort_cmd_end; 1869 } 1870 1871 io_req->abts_done = &tm_done; 1872 1873 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1874 spin_unlock_irqrestore(io_lock, flags); 1875 goto wait_pending; 1876 } 1877 1878 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1879 if (abt_issued_time <= 6000) 1880 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1881 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1882 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1883 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1884 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1885 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1886 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1887 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1888 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1889 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1890 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1891 else 1892 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1893 1894 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1895 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1896 /* 1897 * Command is still pending, need to abort it 1898 * If the firmware completes the command after this point, 1899 * the completion wont be done till mid-layer, since abort 1900 * has already started. 1901 */ 1902 old_ioreq_state = CMD_STATE(sc); 1903 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1904 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1905 1906 spin_unlock_irqrestore(io_lock, flags); 1907 1908 /* 1909 * Check readiness of the remote port. If the path to remote 1910 * port is up, then send abts to the remote port to terminate 1911 * the IO. Else, just locally terminate the IO in the firmware 1912 */ 1913 if (fc_remote_port_chkready(rport) == 0) 1914 task_req = FCPIO_ITMF_ABT_TASK; 1915 else { 1916 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1917 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1918 } 1919 1920 /* Now queue the abort command to firmware */ 1921 int_to_scsilun(sc->device->lun, &fc_lun); 1922 1923 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1924 fc_lun.scsi_lun, io_req)) { 1925 spin_lock_irqsave(io_lock, flags); 1926 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1927 CMD_STATE(sc) = old_ioreq_state; 1928 io_req = (struct fnic_io_req *)CMD_SP(sc); 1929 if (io_req) 1930 io_req->abts_done = NULL; 1931 spin_unlock_irqrestore(io_lock, flags); 1932 ret = FAILED; 1933 goto fnic_abort_cmd_end; 1934 } 1935 if (task_req == FCPIO_ITMF_ABT_TASK) { 1936 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1937 atomic64_inc(&fnic_stats->abts_stats.aborts); 1938 } else { 1939 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1940 atomic64_inc(&fnic_stats->term_stats.terminates); 1941 } 1942 1943 /* 1944 * We queued an abort IO, wait for its completion. 1945 * Once the firmware completes the abort command, it will 1946 * wake up this thread. 1947 */ 1948 wait_pending: 1949 wait_for_completion_timeout(&tm_done, 1950 msecs_to_jiffies 1951 (2 * fnic->config.ra_tov + 1952 fnic->config.ed_tov)); 1953 1954 /* Check the abort status */ 1955 spin_lock_irqsave(io_lock, flags); 1956 1957 io_req = (struct fnic_io_req *)CMD_SP(sc); 1958 if (!io_req) { 1959 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1960 spin_unlock_irqrestore(io_lock, flags); 1961 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1962 ret = FAILED; 1963 goto fnic_abort_cmd_end; 1964 } 1965 io_req->abts_done = NULL; 1966 1967 /* fw did not complete abort, timed out */ 1968 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1969 spin_unlock_irqrestore(io_lock, flags); 1970 if (task_req == FCPIO_ITMF_ABT_TASK) { 1971 atomic64_inc(&abts_stats->abort_drv_timeouts); 1972 } else { 1973 atomic64_inc(&term_stats->terminate_drv_timeouts); 1974 } 1975 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 1976 ret = FAILED; 1977 goto fnic_abort_cmd_end; 1978 } 1979 1980 /* IO out of order */ 1981 1982 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1983 spin_unlock_irqrestore(io_lock, flags); 1984 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1985 "Issuing Host reset due to out of order IO\n"); 1986 1987 ret = FAILED; 1988 goto fnic_abort_cmd_end; 1989 } 1990 1991 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1992 1993 start_time = io_req->start_time; 1994 /* 1995 * firmware completed the abort, check the status, 1996 * free the io_req if successful. If abort fails, 1997 * Device reset will clean the I/O. 1998 */ 1999 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) 2000 CMD_SP(sc) = NULL; 2001 else { 2002 ret = FAILED; 2003 spin_unlock_irqrestore(io_lock, flags); 2004 goto fnic_abort_cmd_end; 2005 } 2006 2007 spin_unlock_irqrestore(io_lock, flags); 2008 2009 fnic_release_ioreq_buf(fnic, io_req, sc); 2010 mempool_free(io_req, fnic->io_req_pool); 2011 2012 if (sc->scsi_done) { 2013 /* Call SCSI completion function to complete the IO */ 2014 sc->result = (DID_ABORT << 16); 2015 sc->scsi_done(sc); 2016 atomic64_dec(&fnic_stats->io_stats.active_ios); 2017 if (atomic64_read(&fnic->io_cmpl_skip)) 2018 atomic64_dec(&fnic->io_cmpl_skip); 2019 else 2020 atomic64_inc(&fnic_stats->io_stats.io_completions); 2021 } 2022 2023 fnic_abort_cmd_end: 2024 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 2025 sc->request->tag, sc, 2026 jiffies_to_msecs(jiffies - start_time), 2027 0, ((u64)sc->cmnd[0] << 32 | 2028 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2029 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2030 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2031 2032 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2033 "Returning from abort cmd type %x %s\n", task_req, 2034 (ret == SUCCESS) ? 2035 "SUCCESS" : "FAILED"); 2036 return ret; 2037 } 2038 2039 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 2040 struct scsi_cmnd *sc, 2041 struct fnic_io_req *io_req) 2042 { 2043 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 2044 struct Scsi_Host *host = fnic->lport->host; 2045 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 2046 struct scsi_lun fc_lun; 2047 int ret = 0; 2048 unsigned long intr_flags; 2049 2050 spin_lock_irqsave(host->host_lock, intr_flags); 2051 if (unlikely(fnic_chk_state_flags_locked(fnic, 2052 FNIC_FLAGS_IO_BLOCKED))) { 2053 spin_unlock_irqrestore(host->host_lock, intr_flags); 2054 return FAILED; 2055 } else 2056 atomic_inc(&fnic->in_flight); 2057 spin_unlock_irqrestore(host->host_lock, intr_flags); 2058 2059 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 2060 2061 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 2062 free_wq_copy_descs(fnic, wq); 2063 2064 if (!vnic_wq_copy_desc_avail(wq)) { 2065 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2066 "queue_dr_io_req failure - no descriptors\n"); 2067 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 2068 ret = -EAGAIN; 2069 goto lr_io_req_end; 2070 } 2071 2072 /* fill in the lun info */ 2073 int_to_scsilun(sc->device->lun, &fc_lun); 2074 2075 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 2076 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 2077 fc_lun.scsi_lun, io_req->port_id, 2078 fnic->config.ra_tov, fnic->config.ed_tov); 2079 2080 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 2081 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 2082 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 2083 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 2084 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 2085 2086 lr_io_req_end: 2087 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 2088 atomic_dec(&fnic->in_flight); 2089 2090 return ret; 2091 } 2092 2093 /* 2094 * Clean up any pending aborts on the lun 2095 * For each outstanding IO on this lun, whose abort is not completed by fw, 2096 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2097 * successfully aborted, 1 otherwise 2098 */ 2099 static int fnic_clean_pending_aborts(struct fnic *fnic, 2100 struct scsi_cmnd *lr_sc, 2101 bool new_sc) 2102 2103 { 2104 int tag, abt_tag; 2105 struct fnic_io_req *io_req; 2106 spinlock_t *io_lock; 2107 unsigned long flags; 2108 int ret = 0; 2109 struct scsi_cmnd *sc; 2110 struct scsi_lun fc_lun; 2111 struct scsi_device *lun_dev = lr_sc->device; 2112 DECLARE_COMPLETION_ONSTACK(tm_done); 2113 enum fnic_ioreq_state old_ioreq_state; 2114 2115 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2116 io_lock = fnic_io_lock_tag(fnic, tag); 2117 spin_lock_irqsave(io_lock, flags); 2118 sc = scsi_host_find_tag(fnic->lport->host, tag); 2119 /* 2120 * ignore this lun reset cmd if issued using new SC 2121 * or cmds that do not belong to this lun 2122 */ 2123 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) { 2124 spin_unlock_irqrestore(io_lock, flags); 2125 continue; 2126 } 2127 2128 io_req = (struct fnic_io_req *)CMD_SP(sc); 2129 2130 if (!io_req || sc->device != lun_dev) { 2131 spin_unlock_irqrestore(io_lock, flags); 2132 continue; 2133 } 2134 2135 /* 2136 * Found IO that is still pending with firmware and 2137 * belongs to the LUN that we are resetting 2138 */ 2139 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2140 "Found IO in %s on lun\n", 2141 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2142 2143 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2144 spin_unlock_irqrestore(io_lock, flags); 2145 continue; 2146 } 2147 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 2148 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 2149 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2150 "%s dev rst not pending sc 0x%p\n", __func__, 2151 sc); 2152 spin_unlock_irqrestore(io_lock, flags); 2153 continue; 2154 } 2155 2156 if (io_req->abts_done) 2157 shost_printk(KERN_ERR, fnic->lport->host, 2158 "%s: io_req->abts_done is set state is %s\n", 2159 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 2160 old_ioreq_state = CMD_STATE(sc); 2161 /* 2162 * Any pending IO issued prior to reset is expected to be 2163 * in abts pending state, if not we need to set 2164 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2165 * When IO is completed, the IO will be handed over and 2166 * handled in this function. 2167 */ 2168 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2169 2170 BUG_ON(io_req->abts_done); 2171 2172 abt_tag = tag; 2173 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 2174 abt_tag |= FNIC_TAG_DEV_RST; 2175 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2176 "%s: dev rst sc 0x%p\n", __func__, sc); 2177 } 2178 2179 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 2180 io_req->abts_done = &tm_done; 2181 spin_unlock_irqrestore(io_lock, flags); 2182 2183 /* Now queue the abort command to firmware */ 2184 int_to_scsilun(sc->device->lun, &fc_lun); 2185 2186 if (fnic_queue_abort_io_req(fnic, abt_tag, 2187 FCPIO_ITMF_ABT_TASK_TERM, 2188 fc_lun.scsi_lun, io_req)) { 2189 spin_lock_irqsave(io_lock, flags); 2190 io_req = (struct fnic_io_req *)CMD_SP(sc); 2191 if (io_req) 2192 io_req->abts_done = NULL; 2193 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2194 CMD_STATE(sc) = old_ioreq_state; 2195 spin_unlock_irqrestore(io_lock, flags); 2196 ret = 1; 2197 goto clean_pending_aborts_end; 2198 } else { 2199 spin_lock_irqsave(io_lock, flags); 2200 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 2201 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2202 spin_unlock_irqrestore(io_lock, flags); 2203 } 2204 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 2205 2206 wait_for_completion_timeout(&tm_done, 2207 msecs_to_jiffies 2208 (fnic->config.ed_tov)); 2209 2210 /* Recheck cmd state to check if it is now aborted */ 2211 spin_lock_irqsave(io_lock, flags); 2212 io_req = (struct fnic_io_req *)CMD_SP(sc); 2213 if (!io_req) { 2214 spin_unlock_irqrestore(io_lock, flags); 2215 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 2216 continue; 2217 } 2218 2219 io_req->abts_done = NULL; 2220 2221 /* if abort is still pending with fw, fail */ 2222 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 2223 spin_unlock_irqrestore(io_lock, flags); 2224 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 2225 ret = 1; 2226 goto clean_pending_aborts_end; 2227 } 2228 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2229 2230 /* original sc used for lr is handled by dev reset code */ 2231 if (sc != lr_sc) 2232 CMD_SP(sc) = NULL; 2233 spin_unlock_irqrestore(io_lock, flags); 2234 2235 /* original sc used for lr is handled by dev reset code */ 2236 if (sc != lr_sc) { 2237 fnic_release_ioreq_buf(fnic, io_req, sc); 2238 mempool_free(io_req, fnic->io_req_pool); 2239 } 2240 2241 /* 2242 * Any IO is returned during reset, it needs to call scsi_done 2243 * to return the scsi_cmnd to upper layer. 2244 */ 2245 if (sc->scsi_done) { 2246 /* Set result to let upper SCSI layer retry */ 2247 sc->result = DID_RESET << 16; 2248 sc->scsi_done(sc); 2249 } 2250 } 2251 2252 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2253 2254 /* walk again to check, if IOs are still pending in fw */ 2255 if (fnic_is_abts_pending(fnic, lr_sc)) 2256 ret = FAILED; 2257 2258 clean_pending_aborts_end: 2259 return ret; 2260 } 2261 2262 /** 2263 * fnic_scsi_host_start_tag 2264 * Allocates tagid from host's tag list 2265 **/ 2266 static inline int 2267 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2268 { 2269 struct request_queue *q = sc->request->q; 2270 struct request *dummy; 2271 2272 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); 2273 if (IS_ERR(dummy)) 2274 return SCSI_NO_TAG; 2275 2276 sc->tag = sc->request->tag = dummy->tag; 2277 sc->request->special = sc; 2278 2279 return dummy->tag; 2280 } 2281 2282 /** 2283 * fnic_scsi_host_end_tag 2284 * frees tag allocated by fnic_scsi_host_start_tag. 2285 **/ 2286 static inline void 2287 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2288 { 2289 struct request *dummy = sc->request->special; 2290 2291 blk_mq_free_request(dummy); 2292 } 2293 2294 /* 2295 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2296 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2297 * on the LUN. 2298 */ 2299 int fnic_device_reset(struct scsi_cmnd *sc) 2300 { 2301 struct fc_lport *lp; 2302 struct fnic *fnic; 2303 struct fnic_io_req *io_req = NULL; 2304 struct fc_rport *rport; 2305 int status; 2306 int ret = FAILED; 2307 spinlock_t *io_lock; 2308 unsigned long flags; 2309 unsigned long start_time = 0; 2310 struct scsi_lun fc_lun; 2311 struct fnic_stats *fnic_stats; 2312 struct reset_stats *reset_stats; 2313 int tag = 0; 2314 DECLARE_COMPLETION_ONSTACK(tm_done); 2315 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2316 bool new_sc = 0; 2317 2318 /* Wait for rport to unblock */ 2319 fc_block_scsi_eh(sc); 2320 2321 /* Get local-port, check ready and link up */ 2322 lp = shost_priv(sc->device->host); 2323 2324 fnic = lport_priv(lp); 2325 fnic_stats = &fnic->fnic_stats; 2326 reset_stats = &fnic->fnic_stats.reset_stats; 2327 2328 atomic64_inc(&reset_stats->device_resets); 2329 2330 rport = starget_to_rport(scsi_target(sc->device)); 2331 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2332 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2333 rport->port_id, sc->device->lun, sc); 2334 2335 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2336 goto fnic_device_reset_end; 2337 2338 /* Check if remote port up */ 2339 if (fc_remote_port_chkready(rport)) { 2340 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2341 goto fnic_device_reset_end; 2342 } 2343 2344 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2345 /* Allocate tag if not present */ 2346 2347 tag = sc->request->tag; 2348 if (unlikely(tag < 0)) { 2349 /* 2350 * Really should fix the midlayer to pass in a proper 2351 * request for ioctls... 2352 */ 2353 tag = fnic_scsi_host_start_tag(fnic, sc); 2354 if (unlikely(tag == SCSI_NO_TAG)) 2355 goto fnic_device_reset_end; 2356 tag_gen_flag = 1; 2357 new_sc = 1; 2358 } 2359 io_lock = fnic_io_lock_hash(fnic, sc); 2360 spin_lock_irqsave(io_lock, flags); 2361 io_req = (struct fnic_io_req *)CMD_SP(sc); 2362 2363 /* 2364 * If there is a io_req attached to this command, then use it, 2365 * else allocate a new one. 2366 */ 2367 if (!io_req) { 2368 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2369 if (!io_req) { 2370 spin_unlock_irqrestore(io_lock, flags); 2371 goto fnic_device_reset_end; 2372 } 2373 memset(io_req, 0, sizeof(*io_req)); 2374 io_req->port_id = rport->port_id; 2375 CMD_SP(sc) = (char *)io_req; 2376 } 2377 io_req->dr_done = &tm_done; 2378 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2379 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2380 spin_unlock_irqrestore(io_lock, flags); 2381 2382 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2383 2384 /* 2385 * issue the device reset, if enqueue failed, clean up the ioreq 2386 * and break assoc with scsi cmd 2387 */ 2388 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2389 spin_lock_irqsave(io_lock, flags); 2390 io_req = (struct fnic_io_req *)CMD_SP(sc); 2391 if (io_req) 2392 io_req->dr_done = NULL; 2393 goto fnic_device_reset_clean; 2394 } 2395 spin_lock_irqsave(io_lock, flags); 2396 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2397 spin_unlock_irqrestore(io_lock, flags); 2398 2399 /* 2400 * Wait on the local completion for LUN reset. The io_req may be 2401 * freed while we wait since we hold no lock. 2402 */ 2403 wait_for_completion_timeout(&tm_done, 2404 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2405 2406 spin_lock_irqsave(io_lock, flags); 2407 io_req = (struct fnic_io_req *)CMD_SP(sc); 2408 if (!io_req) { 2409 spin_unlock_irqrestore(io_lock, flags); 2410 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2411 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2412 goto fnic_device_reset_end; 2413 } 2414 io_req->dr_done = NULL; 2415 2416 status = CMD_LR_STATUS(sc); 2417 2418 /* 2419 * If lun reset not completed, bail out with failed. io_req 2420 * gets cleaned up during higher levels of EH 2421 */ 2422 if (status == FCPIO_INVALID_CODE) { 2423 atomic64_inc(&reset_stats->device_reset_timeouts); 2424 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2425 "Device reset timed out\n"); 2426 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2427 spin_unlock_irqrestore(io_lock, flags); 2428 int_to_scsilun(sc->device->lun, &fc_lun); 2429 /* 2430 * Issue abort and terminate on device reset request. 2431 * If q'ing of terminate fails, retry it after a delay. 2432 */ 2433 while (1) { 2434 spin_lock_irqsave(io_lock, flags); 2435 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2436 spin_unlock_irqrestore(io_lock, flags); 2437 break; 2438 } 2439 spin_unlock_irqrestore(io_lock, flags); 2440 if (fnic_queue_abort_io_req(fnic, 2441 tag | FNIC_TAG_DEV_RST, 2442 FCPIO_ITMF_ABT_TASK_TERM, 2443 fc_lun.scsi_lun, io_req)) { 2444 wait_for_completion_timeout(&tm_done, 2445 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2446 } else { 2447 spin_lock_irqsave(io_lock, flags); 2448 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2449 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2450 io_req->abts_done = &tm_done; 2451 spin_unlock_irqrestore(io_lock, flags); 2452 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2453 "Abort and terminate issued on Device reset " 2454 "tag 0x%x sc 0x%p\n", tag, sc); 2455 break; 2456 } 2457 } 2458 while (1) { 2459 spin_lock_irqsave(io_lock, flags); 2460 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2461 spin_unlock_irqrestore(io_lock, flags); 2462 wait_for_completion_timeout(&tm_done, 2463 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2464 break; 2465 } else { 2466 io_req = (struct fnic_io_req *)CMD_SP(sc); 2467 io_req->abts_done = NULL; 2468 goto fnic_device_reset_clean; 2469 } 2470 } 2471 } else { 2472 spin_unlock_irqrestore(io_lock, flags); 2473 } 2474 2475 /* Completed, but not successful, clean up the io_req, return fail */ 2476 if (status != FCPIO_SUCCESS) { 2477 spin_lock_irqsave(io_lock, flags); 2478 FNIC_SCSI_DBG(KERN_DEBUG, 2479 fnic->lport->host, 2480 "Device reset completed - failed\n"); 2481 io_req = (struct fnic_io_req *)CMD_SP(sc); 2482 goto fnic_device_reset_clean; 2483 } 2484 2485 /* 2486 * Clean up any aborts on this lun that have still not 2487 * completed. If any of these fail, then LUN reset fails. 2488 * clean_pending_aborts cleans all cmds on this lun except 2489 * the lun reset cmd. If all cmds get cleaned, the lun reset 2490 * succeeds 2491 */ 2492 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2493 spin_lock_irqsave(io_lock, flags); 2494 io_req = (struct fnic_io_req *)CMD_SP(sc); 2495 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2496 "Device reset failed" 2497 " since could not abort all IOs\n"); 2498 goto fnic_device_reset_clean; 2499 } 2500 2501 /* Clean lun reset command */ 2502 spin_lock_irqsave(io_lock, flags); 2503 io_req = (struct fnic_io_req *)CMD_SP(sc); 2504 if (io_req) 2505 /* Completed, and successful */ 2506 ret = SUCCESS; 2507 2508 fnic_device_reset_clean: 2509 if (io_req) 2510 CMD_SP(sc) = NULL; 2511 2512 spin_unlock_irqrestore(io_lock, flags); 2513 2514 if (io_req) { 2515 start_time = io_req->start_time; 2516 fnic_release_ioreq_buf(fnic, io_req, sc); 2517 mempool_free(io_req, fnic->io_req_pool); 2518 } 2519 2520 fnic_device_reset_end: 2521 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2522 sc->request->tag, sc, 2523 jiffies_to_msecs(jiffies - start_time), 2524 0, ((u64)sc->cmnd[0] << 32 | 2525 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2526 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2527 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2528 2529 /* free tag if it is allocated */ 2530 if (unlikely(tag_gen_flag)) 2531 fnic_scsi_host_end_tag(fnic, sc); 2532 2533 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2534 "Returning from device reset %s\n", 2535 (ret == SUCCESS) ? 2536 "SUCCESS" : "FAILED"); 2537 2538 if (ret == FAILED) 2539 atomic64_inc(&reset_stats->device_reset_failures); 2540 2541 return ret; 2542 } 2543 2544 /* Clean up all IOs, clean up libFC local port */ 2545 int fnic_reset(struct Scsi_Host *shost) 2546 { 2547 struct fc_lport *lp; 2548 struct fnic *fnic; 2549 int ret = 0; 2550 struct reset_stats *reset_stats; 2551 2552 lp = shost_priv(shost); 2553 fnic = lport_priv(lp); 2554 reset_stats = &fnic->fnic_stats.reset_stats; 2555 2556 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2557 "fnic_reset called\n"); 2558 2559 atomic64_inc(&reset_stats->fnic_resets); 2560 2561 /* 2562 * Reset local port, this will clean up libFC exchanges, 2563 * reset remote port sessions, and if link is up, begin flogi 2564 */ 2565 ret = fc_lport_reset(lp); 2566 2567 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2568 "Returning from fnic reset %s\n", 2569 (ret == 0) ? 2570 "SUCCESS" : "FAILED"); 2571 2572 if (ret == 0) 2573 atomic64_inc(&reset_stats->fnic_reset_completions); 2574 else 2575 atomic64_inc(&reset_stats->fnic_reset_failures); 2576 2577 return ret; 2578 } 2579 2580 /* 2581 * SCSI Error handling calls driver's eh_host_reset if all prior 2582 * error handling levels return FAILED. If host reset completes 2583 * successfully, and if link is up, then Fabric login begins. 2584 * 2585 * Host Reset is the highest level of error recovery. If this fails, then 2586 * host is offlined by SCSI. 2587 * 2588 */ 2589 int fnic_host_reset(struct scsi_cmnd *sc) 2590 { 2591 int ret; 2592 unsigned long wait_host_tmo; 2593 struct Scsi_Host *shost = sc->device->host; 2594 struct fc_lport *lp = shost_priv(shost); 2595 struct fnic *fnic = lport_priv(lp); 2596 unsigned long flags; 2597 2598 spin_lock_irqsave(&fnic->fnic_lock, flags); 2599 if (fnic->internal_reset_inprogress == 0) { 2600 fnic->internal_reset_inprogress = 1; 2601 } else { 2602 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2603 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2604 "host reset in progress skipping another host reset\n"); 2605 return SUCCESS; 2606 } 2607 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2608 2609 /* 2610 * If fnic_reset is successful, wait for fabric login to complete 2611 * scsi-ml tries to send a TUR to every device if host reset is 2612 * successful, so before returning to scsi, fabric should be up 2613 */ 2614 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2615 if (ret == SUCCESS) { 2616 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2617 ret = FAILED; 2618 while (time_before(jiffies, wait_host_tmo)) { 2619 if ((lp->state == LPORT_ST_READY) && 2620 (lp->link_up)) { 2621 ret = SUCCESS; 2622 break; 2623 } 2624 ssleep(1); 2625 } 2626 } 2627 2628 spin_lock_irqsave(&fnic->fnic_lock, flags); 2629 fnic->internal_reset_inprogress = 0; 2630 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2631 return ret; 2632 } 2633 2634 /* 2635 * This fxn is called from libFC when host is removed 2636 */ 2637 void fnic_scsi_abort_io(struct fc_lport *lp) 2638 { 2639 int err = 0; 2640 unsigned long flags; 2641 enum fnic_state old_state; 2642 struct fnic *fnic = lport_priv(lp); 2643 DECLARE_COMPLETION_ONSTACK(remove_wait); 2644 2645 /* Issue firmware reset for fnic, wait for reset to complete */ 2646 retry_fw_reset: 2647 spin_lock_irqsave(&fnic->fnic_lock, flags); 2648 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2649 /* fw reset is in progress, poll for its completion */ 2650 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2651 schedule_timeout(msecs_to_jiffies(100)); 2652 goto retry_fw_reset; 2653 } 2654 2655 fnic->remove_wait = &remove_wait; 2656 old_state = fnic->state; 2657 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2658 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2659 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2660 2661 err = fnic_fw_reset_handler(fnic); 2662 if (err) { 2663 spin_lock_irqsave(&fnic->fnic_lock, flags); 2664 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2665 fnic->state = old_state; 2666 fnic->remove_wait = NULL; 2667 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2668 return; 2669 } 2670 2671 /* Wait for firmware reset to complete */ 2672 wait_for_completion_timeout(&remove_wait, 2673 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2674 2675 spin_lock_irqsave(&fnic->fnic_lock, flags); 2676 fnic->remove_wait = NULL; 2677 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2678 "fnic_scsi_abort_io %s\n", 2679 (fnic->state == FNIC_IN_ETH_MODE) ? 2680 "SUCCESS" : "FAILED"); 2681 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2682 2683 } 2684 2685 /* 2686 * This fxn called from libFC to clean up driver IO state on link down 2687 */ 2688 void fnic_scsi_cleanup(struct fc_lport *lp) 2689 { 2690 unsigned long flags; 2691 enum fnic_state old_state; 2692 struct fnic *fnic = lport_priv(lp); 2693 2694 /* issue fw reset */ 2695 retry_fw_reset: 2696 spin_lock_irqsave(&fnic->fnic_lock, flags); 2697 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2698 /* fw reset is in progress, poll for its completion */ 2699 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2700 schedule_timeout(msecs_to_jiffies(100)); 2701 goto retry_fw_reset; 2702 } 2703 old_state = fnic->state; 2704 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2705 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2706 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2707 2708 if (fnic_fw_reset_handler(fnic)) { 2709 spin_lock_irqsave(&fnic->fnic_lock, flags); 2710 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2711 fnic->state = old_state; 2712 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2713 } 2714 2715 } 2716 2717 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2718 { 2719 } 2720 2721 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2722 { 2723 struct fnic *fnic = lport_priv(lp); 2724 2725 /* Non-zero sid, nothing to do */ 2726 if (sid) 2727 goto call_fc_exch_mgr_reset; 2728 2729 if (did) { 2730 fnic_rport_exch_reset(fnic, did); 2731 goto call_fc_exch_mgr_reset; 2732 } 2733 2734 /* 2735 * sid = 0, did = 0 2736 * link down or device being removed 2737 */ 2738 if (!fnic->in_remove) 2739 fnic_scsi_cleanup(lp); 2740 else 2741 fnic_scsi_abort_io(lp); 2742 2743 /* call libFC exch mgr reset to reset its exchanges */ 2744 call_fc_exch_mgr_reset: 2745 fc_exch_mgr_reset(lp, sid, did); 2746 2747 } 2748 2749 /* 2750 * fnic_is_abts_pending() is a helper function that 2751 * walks through tag map to check if there is any IOs pending,if there is one, 2752 * then it returns 1 (true), otherwise 0 (false) 2753 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2754 * otherwise, it checks for all IOs. 2755 */ 2756 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2757 { 2758 int tag; 2759 struct fnic_io_req *io_req; 2760 spinlock_t *io_lock; 2761 unsigned long flags; 2762 int ret = 0; 2763 struct scsi_cmnd *sc; 2764 struct scsi_device *lun_dev = NULL; 2765 2766 if (lr_sc) 2767 lun_dev = lr_sc->device; 2768 2769 /* walk again to check, if IOs are still pending in fw */ 2770 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2771 sc = scsi_host_find_tag(fnic->lport->host, tag); 2772 /* 2773 * ignore this lun reset cmd or cmds that do not belong to 2774 * this lun 2775 */ 2776 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) 2777 continue; 2778 2779 io_lock = fnic_io_lock_hash(fnic, sc); 2780 spin_lock_irqsave(io_lock, flags); 2781 2782 io_req = (struct fnic_io_req *)CMD_SP(sc); 2783 2784 if (!io_req || sc->device != lun_dev) { 2785 spin_unlock_irqrestore(io_lock, flags); 2786 continue; 2787 } 2788 2789 /* 2790 * Found IO that is still pending with firmware and 2791 * belongs to the LUN that we are resetting 2792 */ 2793 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2794 "Found IO in %s on lun\n", 2795 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2796 2797 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2798 ret = 1; 2799 spin_unlock_irqrestore(io_lock, flags); 2800 } 2801 2802 return ret; 2803 } 2804