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 int r; 334 335 if (sg_count) { 336 /* For each SGE, create a device desc entry */ 337 desc = io_req->sgl_list; 338 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 339 desc->addr = cpu_to_le64(sg_dma_address(sg)); 340 desc->len = cpu_to_le32(sg_dma_len(sg)); 341 desc->_resvd = 0; 342 desc++; 343 } 344 345 io_req->sgl_list_pa = pci_map_single 346 (fnic->pdev, 347 io_req->sgl_list, 348 sizeof(io_req->sgl_list[0]) * sg_count, 349 PCI_DMA_TODEVICE); 350 351 r = pci_dma_mapping_error(fnic->pdev, io_req->sgl_list_pa); 352 if (r) { 353 printk(KERN_ERR "PCI mapping failed with error %d\n", r); 354 return SCSI_MLQUEUE_HOST_BUSY; 355 } 356 } 357 358 io_req->sense_buf_pa = pci_map_single(fnic->pdev, 359 sc->sense_buffer, 360 SCSI_SENSE_BUFFERSIZE, 361 PCI_DMA_FROMDEVICE); 362 363 r = pci_dma_mapping_error(fnic->pdev, io_req->sense_buf_pa); 364 if (r) { 365 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa, 366 sizeof(io_req->sgl_list[0]) * sg_count, 367 PCI_DMA_TODEVICE); 368 printk(KERN_ERR "PCI mapping failed with error %d\n", r); 369 return SCSI_MLQUEUE_HOST_BUSY; 370 } 371 372 int_to_scsilun(sc->device->lun, &fc_lun); 373 374 /* Enqueue the descriptor in the Copy WQ */ 375 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 376 377 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 378 free_wq_copy_descs(fnic, wq); 379 380 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 381 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 382 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 383 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 384 atomic64_inc(&misc_stats->io_cpwq_alloc_failures); 385 return SCSI_MLQUEUE_HOST_BUSY; 386 } 387 388 flags = 0; 389 if (sc->sc_data_direction == DMA_FROM_DEVICE) 390 flags = FCPIO_ICMND_RDDATA; 391 else if (sc->sc_data_direction == DMA_TO_DEVICE) 392 flags = FCPIO_ICMND_WRDATA; 393 394 exch_flags = 0; 395 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 396 (rp->flags & FC_RP_FLAGS_RETRY)) 397 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 398 399 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, 400 0, exch_flags, io_req->sgl_cnt, 401 SCSI_SENSE_BUFFERSIZE, 402 io_req->sgl_list_pa, 403 io_req->sense_buf_pa, 404 0, /* scsi cmd ref, always 0 */ 405 FCPIO_ICMND_PTA_SIMPLE, 406 /* scsi pri and tag */ 407 flags, /* command flags */ 408 sc->cmnd, sc->cmd_len, 409 scsi_bufflen(sc), 410 fc_lun.scsi_lun, io_req->port_id, 411 rport->maxframe_size, rp->r_a_tov, 412 rp->e_d_tov); 413 414 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 415 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 416 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 417 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 418 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 419 420 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 421 return 0; 422 } 423 424 /* 425 * fnic_queuecommand 426 * Routine to send a scsi cdb 427 * Called with host_lock held and interrupts disabled. 428 */ 429 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) 430 { 431 struct fc_lport *lp = shost_priv(sc->device->host); 432 struct fc_rport *rport; 433 struct fnic_io_req *io_req = NULL; 434 struct fnic *fnic = lport_priv(lp); 435 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 436 struct vnic_wq_copy *wq; 437 int ret; 438 u64 cmd_trace; 439 int sg_count = 0; 440 unsigned long flags = 0; 441 unsigned long ptr; 442 spinlock_t *io_lock = NULL; 443 int io_lock_acquired = 0; 444 struct fc_rport_libfc_priv *rp; 445 446 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 447 return SCSI_MLQUEUE_HOST_BUSY; 448 449 rport = starget_to_rport(scsi_target(sc->device)); 450 if (!rport) { 451 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 452 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 453 sc->result = DID_NO_CONNECT << 16; 454 done(sc); 455 return 0; 456 } 457 458 ret = fc_remote_port_chkready(rport); 459 if (ret) { 460 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 461 "rport is not ready\n"); 462 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 463 sc->result = ret; 464 done(sc); 465 return 0; 466 } 467 468 rp = rport->dd_data; 469 if (!rp || rp->rp_state != RPORT_ST_READY) { 470 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 471 "returning DID_NO_CONNECT for IO as rport is removed\n"); 472 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 473 sc->result = DID_NO_CONNECT<<16; 474 done(sc); 475 return 0; 476 } 477 478 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 479 return SCSI_MLQUEUE_HOST_BUSY; 480 481 atomic_inc(&fnic->in_flight); 482 483 /* 484 * Release host lock, use driver resource specific locks from here. 485 * Don't re-enable interrupts in case they were disabled prior to the 486 * caller disabling them. 487 */ 488 spin_unlock(lp->host->host_lock); 489 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 490 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 491 492 /* Get a new io_req for this SCSI IO */ 493 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 494 if (!io_req) { 495 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 496 ret = SCSI_MLQUEUE_HOST_BUSY; 497 goto out; 498 } 499 memset(io_req, 0, sizeof(*io_req)); 500 501 /* Map the data buffer */ 502 sg_count = scsi_dma_map(sc); 503 if (sg_count < 0) { 504 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 505 sc->request->tag, sc, 0, sc->cmnd[0], 506 sg_count, CMD_STATE(sc)); 507 mempool_free(io_req, fnic->io_req_pool); 508 goto out; 509 } 510 511 /* Determine the type of scatter/gather list we need */ 512 io_req->sgl_cnt = sg_count; 513 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 514 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 515 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 516 517 if (sg_count) { 518 io_req->sgl_list = 519 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 520 GFP_ATOMIC); 521 if (!io_req->sgl_list) { 522 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 523 ret = SCSI_MLQUEUE_HOST_BUSY; 524 scsi_dma_unmap(sc); 525 mempool_free(io_req, fnic->io_req_pool); 526 goto out; 527 } 528 529 /* Cache sgl list allocated address before alignment */ 530 io_req->sgl_list_alloc = io_req->sgl_list; 531 ptr = (unsigned long) io_req->sgl_list; 532 if (ptr % FNIC_SG_DESC_ALIGN) { 533 io_req->sgl_list = (struct host_sg_desc *) 534 (((unsigned long) ptr 535 + FNIC_SG_DESC_ALIGN - 1) 536 & ~(FNIC_SG_DESC_ALIGN - 1)); 537 } 538 } 539 540 /* 541 * Will acquire lock defore setting to IO initialized. 542 */ 543 544 io_lock = fnic_io_lock_hash(fnic, sc); 545 spin_lock_irqsave(io_lock, flags); 546 547 /* initialize rest of io_req */ 548 io_lock_acquired = 1; 549 io_req->port_id = rport->port_id; 550 io_req->start_time = jiffies; 551 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 552 CMD_SP(sc) = (char *)io_req; 553 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; 554 sc->scsi_done = done; 555 556 /* create copy wq desc and enqueue it */ 557 wq = &fnic->wq_copy[0]; 558 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 559 if (ret) { 560 /* 561 * In case another thread cancelled the request, 562 * refetch the pointer under the lock. 563 */ 564 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 565 sc->request->tag, sc, 0, 0, 0, 566 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 567 io_req = (struct fnic_io_req *)CMD_SP(sc); 568 CMD_SP(sc) = NULL; 569 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 570 spin_unlock_irqrestore(io_lock, flags); 571 if (io_req) { 572 fnic_release_ioreq_buf(fnic, io_req, sc); 573 mempool_free(io_req, fnic->io_req_pool); 574 } 575 atomic_dec(&fnic->in_flight); 576 /* acquire host lock before returning to SCSI */ 577 spin_lock(lp->host->host_lock); 578 return ret; 579 } else { 580 atomic64_inc(&fnic_stats->io_stats.active_ios); 581 atomic64_inc(&fnic_stats->io_stats.num_ios); 582 if (atomic64_read(&fnic_stats->io_stats.active_ios) > 583 atomic64_read(&fnic_stats->io_stats.max_active_ios)) 584 atomic64_set(&fnic_stats->io_stats.max_active_ios, 585 atomic64_read(&fnic_stats->io_stats.active_ios)); 586 587 /* REVISIT: Use per IO lock in the final code */ 588 CMD_FLAGS(sc) |= FNIC_IO_ISSUED; 589 } 590 out: 591 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 592 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 593 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 594 sc->cmnd[5]); 595 596 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 597 sc->request->tag, sc, io_req, 598 sg_count, cmd_trace, 599 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); 600 601 /* if only we issued IO, will we have the io lock */ 602 if (io_lock_acquired) 603 spin_unlock_irqrestore(io_lock, flags); 604 605 atomic_dec(&fnic->in_flight); 606 /* acquire host lock before returning to SCSI */ 607 spin_lock(lp->host->host_lock); 608 return ret; 609 } 610 611 DEF_SCSI_QCMD(fnic_queuecommand) 612 613 /* 614 * fnic_fcpio_fw_reset_cmpl_handler 615 * Routine to handle fw reset completion 616 */ 617 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 618 struct fcpio_fw_req *desc) 619 { 620 u8 type; 621 u8 hdr_status; 622 struct fcpio_tag tag; 623 int ret = 0; 624 unsigned long flags; 625 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 626 627 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 628 629 atomic64_inc(&reset_stats->fw_reset_completions); 630 631 /* Clean up all outstanding io requests */ 632 fnic_cleanup_io(fnic, SCSI_NO_TAG); 633 634 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 635 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 636 637 spin_lock_irqsave(&fnic->fnic_lock, flags); 638 639 /* fnic should be in FC_TRANS_ETH_MODE */ 640 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 641 /* Check status of reset completion */ 642 if (!hdr_status) { 643 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 644 "reset cmpl success\n"); 645 /* Ready to send flogi out */ 646 fnic->state = FNIC_IN_ETH_MODE; 647 } else { 648 FNIC_SCSI_DBG(KERN_DEBUG, 649 fnic->lport->host, 650 "fnic fw_reset : failed %s\n", 651 fnic_fcpio_status_to_str(hdr_status)); 652 653 /* 654 * Unable to change to eth mode, cannot send out flogi 655 * Change state to fc mode, so that subsequent Flogi 656 * requests from libFC will cause more attempts to 657 * reset the firmware. Free the cached flogi 658 */ 659 fnic->state = FNIC_IN_FC_MODE; 660 atomic64_inc(&reset_stats->fw_reset_failures); 661 ret = -1; 662 } 663 } else { 664 FNIC_SCSI_DBG(KERN_DEBUG, 665 fnic->lport->host, 666 "Unexpected state %s while processing" 667 " reset cmpl\n", fnic_state_to_str(fnic->state)); 668 atomic64_inc(&reset_stats->fw_reset_failures); 669 ret = -1; 670 } 671 672 /* Thread removing device blocks till firmware reset is complete */ 673 if (fnic->remove_wait) 674 complete(fnic->remove_wait); 675 676 /* 677 * If fnic is being removed, or fw reset failed 678 * free the flogi frame. Else, send it out 679 */ 680 if (fnic->remove_wait || ret) { 681 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 682 skb_queue_purge(&fnic->tx_queue); 683 goto reset_cmpl_handler_end; 684 } 685 686 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 687 688 fnic_flush_tx(fnic); 689 690 reset_cmpl_handler_end: 691 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 692 693 return ret; 694 } 695 696 /* 697 * fnic_fcpio_flogi_reg_cmpl_handler 698 * Routine to handle flogi register completion 699 */ 700 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 701 struct fcpio_fw_req *desc) 702 { 703 u8 type; 704 u8 hdr_status; 705 struct fcpio_tag tag; 706 int ret = 0; 707 unsigned long flags; 708 709 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 710 711 /* Update fnic state based on status of flogi reg completion */ 712 spin_lock_irqsave(&fnic->fnic_lock, flags); 713 714 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 715 716 /* Check flogi registration completion status */ 717 if (!hdr_status) { 718 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 719 "flog reg succeeded\n"); 720 fnic->state = FNIC_IN_FC_MODE; 721 } else { 722 FNIC_SCSI_DBG(KERN_DEBUG, 723 fnic->lport->host, 724 "fnic flogi reg :failed %s\n", 725 fnic_fcpio_status_to_str(hdr_status)); 726 fnic->state = FNIC_IN_ETH_MODE; 727 ret = -1; 728 } 729 } else { 730 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 731 "Unexpected fnic state %s while" 732 " processing flogi reg completion\n", 733 fnic_state_to_str(fnic->state)); 734 ret = -1; 735 } 736 737 if (!ret) { 738 if (fnic->stop_rx_link_events) { 739 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 740 goto reg_cmpl_handler_end; 741 } 742 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 743 744 fnic_flush_tx(fnic); 745 queue_work(fnic_event_queue, &fnic->frame_work); 746 } else { 747 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 748 } 749 750 reg_cmpl_handler_end: 751 return ret; 752 } 753 754 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 755 u16 request_out) 756 { 757 if (wq->to_clean_index <= wq->to_use_index) { 758 /* out of range, stale request_out index */ 759 if (request_out < wq->to_clean_index || 760 request_out >= wq->to_use_index) 761 return 0; 762 } else { 763 /* out of range, stale request_out index */ 764 if (request_out < wq->to_clean_index && 765 request_out >= wq->to_use_index) 766 return 0; 767 } 768 /* request_out index is in range */ 769 return 1; 770 } 771 772 773 /* 774 * Mark that ack received and store the Ack index. If there are multiple 775 * acks received before Tx thread cleans it up, the latest value will be 776 * used which is correct behavior. This state should be in the copy Wq 777 * instead of in the fnic 778 */ 779 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 780 unsigned int cq_index, 781 struct fcpio_fw_req *desc) 782 { 783 struct vnic_wq_copy *wq; 784 u16 request_out = desc->u.ack.request_out; 785 unsigned long flags; 786 u64 *ox_id_tag = (u64 *)(void *)desc; 787 788 /* mark the ack state */ 789 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 790 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 791 792 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 793 if (is_ack_index_in_range(wq, request_out)) { 794 fnic->fw_ack_index[0] = request_out; 795 fnic->fw_ack_recd[0] = 1; 796 } else 797 atomic64_inc( 798 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 799 800 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 801 FNIC_TRACE(fnic_fcpio_ack_handler, 802 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 803 ox_id_tag[4], ox_id_tag[5]); 804 } 805 806 /* 807 * fnic_fcpio_icmnd_cmpl_handler 808 * Routine to handle icmnd completions 809 */ 810 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 811 struct fcpio_fw_req *desc) 812 { 813 u8 type; 814 u8 hdr_status; 815 struct fcpio_tag tag; 816 u32 id; 817 u64 xfer_len = 0; 818 struct fcpio_icmnd_cmpl *icmnd_cmpl; 819 struct fnic_io_req *io_req; 820 struct scsi_cmnd *sc; 821 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 822 unsigned long flags; 823 spinlock_t *io_lock; 824 u64 cmd_trace; 825 unsigned long start_time; 826 unsigned long io_duration_time; 827 828 /* Decode the cmpl description to get the io_req id */ 829 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 830 fcpio_tag_id_dec(&tag, &id); 831 icmnd_cmpl = &desc->u.icmnd_cmpl; 832 833 if (id >= fnic->fnic_max_tag_id) { 834 shost_printk(KERN_ERR, fnic->lport->host, 835 "Tag out of range tag %x hdr status = %s\n", 836 id, fnic_fcpio_status_to_str(hdr_status)); 837 return; 838 } 839 840 sc = scsi_host_find_tag(fnic->lport->host, id); 841 WARN_ON_ONCE(!sc); 842 if (!sc) { 843 atomic64_inc(&fnic_stats->io_stats.sc_null); 844 shost_printk(KERN_ERR, fnic->lport->host, 845 "icmnd_cmpl sc is null - " 846 "hdr status = %s tag = 0x%x desc = 0x%p\n", 847 fnic_fcpio_status_to_str(hdr_status), id, desc); 848 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 849 fnic->lport->host->host_no, id, 850 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 851 (u64)icmnd_cmpl->_resvd0[0]), 852 ((u64)hdr_status << 16 | 853 (u64)icmnd_cmpl->scsi_status << 8 | 854 (u64)icmnd_cmpl->flags), desc, 855 (u64)icmnd_cmpl->residual, 0); 856 return; 857 } 858 859 io_lock = fnic_io_lock_hash(fnic, sc); 860 spin_lock_irqsave(io_lock, flags); 861 io_req = (struct fnic_io_req *)CMD_SP(sc); 862 WARN_ON_ONCE(!io_req); 863 if (!io_req) { 864 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 865 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; 866 spin_unlock_irqrestore(io_lock, flags); 867 shost_printk(KERN_ERR, fnic->lport->host, 868 "icmnd_cmpl io_req is null - " 869 "hdr status = %s tag = 0x%x sc 0x%p\n", 870 fnic_fcpio_status_to_str(hdr_status), id, sc); 871 return; 872 } 873 start_time = io_req->start_time; 874 875 /* firmware completed the io */ 876 io_req->io_completed = 1; 877 878 /* 879 * if SCSI-ML has already issued abort on this command, 880 * set completion of the IO. The abts path will clean it up 881 */ 882 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 883 884 /* 885 * set the FNIC_IO_DONE so that this doesn't get 886 * flagged as 'out of order' if it was not aborted 887 */ 888 CMD_FLAGS(sc) |= FNIC_IO_DONE; 889 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 890 spin_unlock_irqrestore(io_lock, flags); 891 if(FCPIO_ABORTED == hdr_status) 892 CMD_FLAGS(sc) |= FNIC_IO_ABORTED; 893 894 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 895 "icmnd_cmpl abts pending " 896 "hdr status = %s tag = 0x%x sc = 0x%p" 897 "scsi_status = %x residual = %d\n", 898 fnic_fcpio_status_to_str(hdr_status), 899 id, sc, 900 icmnd_cmpl->scsi_status, 901 icmnd_cmpl->residual); 902 return; 903 } 904 905 /* Mark the IO as complete */ 906 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 907 908 icmnd_cmpl = &desc->u.icmnd_cmpl; 909 910 switch (hdr_status) { 911 case FCPIO_SUCCESS: 912 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 913 xfer_len = scsi_bufflen(sc); 914 scsi_set_resid(sc, icmnd_cmpl->residual); 915 916 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) 917 xfer_len -= icmnd_cmpl->residual; 918 919 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) 920 atomic64_inc(&fnic_stats->misc_stats.check_condition); 921 922 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 923 atomic64_inc(&fnic_stats->misc_stats.queue_fulls); 924 break; 925 926 case FCPIO_TIMEOUT: /* request was timed out */ 927 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); 928 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 929 break; 930 931 case FCPIO_ABORTED: /* request was aborted */ 932 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); 933 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 934 break; 935 936 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 937 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); 938 scsi_set_resid(sc, icmnd_cmpl->residual); 939 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 940 break; 941 942 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 943 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); 944 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 945 break; 946 947 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 948 atomic64_inc(&fnic_stats->io_stats.io_not_found); 949 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 950 break; 951 952 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 953 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); 954 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 955 break; 956 957 case FCPIO_FW_ERR: /* request was terminated due fw error */ 958 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); 959 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 960 break; 961 962 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 963 atomic64_inc(&fnic_stats->misc_stats.mss_invalid); 964 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 965 break; 966 967 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 968 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 969 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 970 default: 971 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 972 break; 973 } 974 975 /* Break link with the SCSI command */ 976 CMD_SP(sc) = NULL; 977 CMD_FLAGS(sc) |= FNIC_IO_DONE; 978 979 spin_unlock_irqrestore(io_lock, flags); 980 981 if (hdr_status != FCPIO_SUCCESS) { 982 atomic64_inc(&fnic_stats->io_stats.io_failures); 983 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 984 fnic_fcpio_status_to_str(hdr_status)); 985 } 986 987 fnic_release_ioreq_buf(fnic, io_req, sc); 988 989 mempool_free(io_req, fnic->io_req_pool); 990 991 cmd_trace = ((u64)hdr_status << 56) | 992 (u64)icmnd_cmpl->scsi_status << 48 | 993 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 994 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 995 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 996 997 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 998 sc->device->host->host_no, id, sc, 999 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1000 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1001 jiffies_to_msecs(jiffies - start_time)), 1002 desc, cmd_trace, 1003 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1004 1005 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1006 fnic->lport->host_stats.fcp_input_requests++; 1007 fnic->fcp_input_bytes += xfer_len; 1008 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1009 fnic->lport->host_stats.fcp_output_requests++; 1010 fnic->fcp_output_bytes += xfer_len; 1011 } else 1012 fnic->lport->host_stats.fcp_control_requests++; 1013 1014 atomic64_dec(&fnic_stats->io_stats.active_ios); 1015 if (atomic64_read(&fnic->io_cmpl_skip)) 1016 atomic64_dec(&fnic->io_cmpl_skip); 1017 else 1018 atomic64_inc(&fnic_stats->io_stats.io_completions); 1019 1020 1021 io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1022 1023 if(io_duration_time <= 10) 1024 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1025 else if(io_duration_time <= 100) 1026 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1027 else if(io_duration_time <= 500) 1028 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1029 else if(io_duration_time <= 5000) 1030 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1031 else if(io_duration_time <= 10000) 1032 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1033 else if(io_duration_time <= 30000) 1034 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1035 else { 1036 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1037 1038 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1039 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1040 } 1041 1042 /* Call SCSI completion function to complete the IO */ 1043 if (sc->scsi_done) 1044 sc->scsi_done(sc); 1045 } 1046 1047 /* fnic_fcpio_itmf_cmpl_handler 1048 * Routine to handle itmf completions 1049 */ 1050 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1051 struct fcpio_fw_req *desc) 1052 { 1053 u8 type; 1054 u8 hdr_status; 1055 struct fcpio_tag tag; 1056 u32 id; 1057 struct scsi_cmnd *sc; 1058 struct fnic_io_req *io_req; 1059 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1060 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1061 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1062 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1063 unsigned long flags; 1064 spinlock_t *io_lock; 1065 unsigned long start_time; 1066 1067 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1068 fcpio_tag_id_dec(&tag, &id); 1069 1070 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1071 shost_printk(KERN_ERR, fnic->lport->host, 1072 "Tag out of range tag %x hdr status = %s\n", 1073 id, fnic_fcpio_status_to_str(hdr_status)); 1074 return; 1075 } 1076 1077 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1078 WARN_ON_ONCE(!sc); 1079 if (!sc) { 1080 atomic64_inc(&fnic_stats->io_stats.sc_null); 1081 shost_printk(KERN_ERR, fnic->lport->host, 1082 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1083 fnic_fcpio_status_to_str(hdr_status), id); 1084 return; 1085 } 1086 io_lock = fnic_io_lock_hash(fnic, sc); 1087 spin_lock_irqsave(io_lock, flags); 1088 io_req = (struct fnic_io_req *)CMD_SP(sc); 1089 WARN_ON_ONCE(!io_req); 1090 if (!io_req) { 1091 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1092 spin_unlock_irqrestore(io_lock, flags); 1093 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1094 shost_printk(KERN_ERR, fnic->lport->host, 1095 "itmf_cmpl io_req is null - " 1096 "hdr status = %s tag = 0x%x sc 0x%p\n", 1097 fnic_fcpio_status_to_str(hdr_status), id, sc); 1098 return; 1099 } 1100 start_time = io_req->start_time; 1101 1102 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1103 /* Abort and terminate completion of device reset req */ 1104 /* REVISIT : Add asserts about various flags */ 1105 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1106 "dev reset abts cmpl recd. id %x status %s\n", 1107 id, fnic_fcpio_status_to_str(hdr_status)); 1108 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1109 CMD_ABTS_STATUS(sc) = hdr_status; 1110 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1111 if (io_req->abts_done) 1112 complete(io_req->abts_done); 1113 spin_unlock_irqrestore(io_lock, flags); 1114 } else if (id & FNIC_TAG_ABORT) { 1115 /* Completion of abort cmd */ 1116 switch (hdr_status) { 1117 case FCPIO_SUCCESS: 1118 break; 1119 case FCPIO_TIMEOUT: 1120 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1121 atomic64_inc(&abts_stats->abort_fw_timeouts); 1122 else 1123 atomic64_inc( 1124 &term_stats->terminate_fw_timeouts); 1125 break; 1126 case FCPIO_ITMF_REJECTED: 1127 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1128 "abort reject recd. id %d\n", 1129 (int)(id & FNIC_TAG_MASK)); 1130 break; 1131 case FCPIO_IO_NOT_FOUND: 1132 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1133 atomic64_inc(&abts_stats->abort_io_not_found); 1134 else 1135 atomic64_inc( 1136 &term_stats->terminate_io_not_found); 1137 break; 1138 default: 1139 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1140 atomic64_inc(&abts_stats->abort_failures); 1141 else 1142 atomic64_inc( 1143 &term_stats->terminate_failures); 1144 break; 1145 } 1146 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 1147 /* This is a late completion. Ignore it */ 1148 spin_unlock_irqrestore(io_lock, flags); 1149 return; 1150 } 1151 1152 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1153 CMD_ABTS_STATUS(sc) = hdr_status; 1154 1155 /* If the status is IO not found consider it as success */ 1156 if (hdr_status == FCPIO_IO_NOT_FOUND) 1157 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; 1158 1159 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1160 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1161 1162 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1163 "abts cmpl recd. id %d status %s\n", 1164 (int)(id & FNIC_TAG_MASK), 1165 fnic_fcpio_status_to_str(hdr_status)); 1166 1167 /* 1168 * If scsi_eh thread is blocked waiting for abts to complete, 1169 * signal completion to it. IO will be cleaned in the thread 1170 * else clean it in this context 1171 */ 1172 if (io_req->abts_done) { 1173 complete(io_req->abts_done); 1174 spin_unlock_irqrestore(io_lock, flags); 1175 } else { 1176 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1177 "abts cmpl, completing IO\n"); 1178 CMD_SP(sc) = NULL; 1179 sc->result = (DID_ERROR << 16); 1180 1181 spin_unlock_irqrestore(io_lock, flags); 1182 1183 fnic_release_ioreq_buf(fnic, io_req, sc); 1184 mempool_free(io_req, fnic->io_req_pool); 1185 if (sc->scsi_done) { 1186 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1187 sc->device->host->host_no, id, 1188 sc, 1189 jiffies_to_msecs(jiffies - start_time), 1190 desc, 1191 (((u64)hdr_status << 40) | 1192 (u64)sc->cmnd[0] << 32 | 1193 (u64)sc->cmnd[2] << 24 | 1194 (u64)sc->cmnd[3] << 16 | 1195 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1196 (((u64)CMD_FLAGS(sc) << 32) | 1197 CMD_STATE(sc))); 1198 sc->scsi_done(sc); 1199 atomic64_dec(&fnic_stats->io_stats.active_ios); 1200 if (atomic64_read(&fnic->io_cmpl_skip)) 1201 atomic64_dec(&fnic->io_cmpl_skip); 1202 else 1203 atomic64_inc(&fnic_stats->io_stats.io_completions); 1204 } 1205 } 1206 1207 } else if (id & FNIC_TAG_DEV_RST) { 1208 /* Completion of device reset */ 1209 CMD_LR_STATUS(sc) = hdr_status; 1210 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1211 spin_unlock_irqrestore(io_lock, flags); 1212 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1213 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1214 sc->device->host->host_no, id, sc, 1215 jiffies_to_msecs(jiffies - start_time), 1216 desc, 0, 1217 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1218 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1219 "Terminate pending " 1220 "dev reset cmpl recd. id %d status %s\n", 1221 (int)(id & FNIC_TAG_MASK), 1222 fnic_fcpio_status_to_str(hdr_status)); 1223 return; 1224 } 1225 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1226 /* Need to wait for terminate completion */ 1227 spin_unlock_irqrestore(io_lock, flags); 1228 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1229 sc->device->host->host_no, id, sc, 1230 jiffies_to_msecs(jiffies - start_time), 1231 desc, 0, 1232 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1233 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1234 "dev reset cmpl recd after time out. " 1235 "id %d status %s\n", 1236 (int)(id & FNIC_TAG_MASK), 1237 fnic_fcpio_status_to_str(hdr_status)); 1238 return; 1239 } 1240 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1241 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1242 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1243 "dev reset cmpl recd. id %d status %s\n", 1244 (int)(id & FNIC_TAG_MASK), 1245 fnic_fcpio_status_to_str(hdr_status)); 1246 if (io_req->dr_done) 1247 complete(io_req->dr_done); 1248 spin_unlock_irqrestore(io_lock, flags); 1249 1250 } else { 1251 shost_printk(KERN_ERR, fnic->lport->host, 1252 "Unexpected itmf io state %s tag %x\n", 1253 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1254 spin_unlock_irqrestore(io_lock, flags); 1255 } 1256 1257 } 1258 1259 /* 1260 * fnic_fcpio_cmpl_handler 1261 * Routine to service the cq for wq_copy 1262 */ 1263 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1264 unsigned int cq_index, 1265 struct fcpio_fw_req *desc) 1266 { 1267 struct fnic *fnic = vnic_dev_priv(vdev); 1268 1269 switch (desc->hdr.type) { 1270 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1271 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1272 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1273 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1274 case FCPIO_RESET_CMPL: /* fw completed reset */ 1275 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1276 break; 1277 default: 1278 break; 1279 } 1280 1281 switch (desc->hdr.type) { 1282 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1283 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1284 break; 1285 1286 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1287 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1288 break; 1289 1290 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1291 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1292 break; 1293 1294 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1295 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1296 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1297 break; 1298 1299 case FCPIO_RESET_CMPL: /* fw completed reset */ 1300 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1301 break; 1302 1303 default: 1304 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1305 "firmware completion type %d\n", 1306 desc->hdr.type); 1307 break; 1308 } 1309 1310 return 0; 1311 } 1312 1313 /* 1314 * fnic_wq_copy_cmpl_handler 1315 * Routine to process wq copy 1316 */ 1317 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1318 { 1319 unsigned int wq_work_done = 0; 1320 unsigned int i, cq_index; 1321 unsigned int cur_work_done; 1322 1323 for (i = 0; i < fnic->wq_copy_count; i++) { 1324 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1325 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1326 fnic_fcpio_cmpl_handler, 1327 copy_work_to_do); 1328 wq_work_done += cur_work_done; 1329 } 1330 return wq_work_done; 1331 } 1332 1333 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) 1334 { 1335 int i; 1336 struct fnic_io_req *io_req; 1337 unsigned long flags = 0; 1338 struct scsi_cmnd *sc; 1339 spinlock_t *io_lock; 1340 unsigned long start_time = 0; 1341 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1342 1343 for (i = 0; i < fnic->fnic_max_tag_id; i++) { 1344 if (i == exclude_id) 1345 continue; 1346 1347 io_lock = fnic_io_lock_tag(fnic, i); 1348 spin_lock_irqsave(io_lock, flags); 1349 sc = scsi_host_find_tag(fnic->lport->host, i); 1350 if (!sc) { 1351 spin_unlock_irqrestore(io_lock, flags); 1352 continue; 1353 } 1354 1355 io_req = (struct fnic_io_req *)CMD_SP(sc); 1356 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1357 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1358 /* 1359 * We will be here only when FW completes reset 1360 * without sending completions for outstanding ios. 1361 */ 1362 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1363 if (io_req && io_req->dr_done) 1364 complete(io_req->dr_done); 1365 else if (io_req && io_req->abts_done) 1366 complete(io_req->abts_done); 1367 spin_unlock_irqrestore(io_lock, flags); 1368 continue; 1369 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1370 spin_unlock_irqrestore(io_lock, flags); 1371 continue; 1372 } 1373 if (!io_req) { 1374 spin_unlock_irqrestore(io_lock, flags); 1375 goto cleanup_scsi_cmd; 1376 } 1377 1378 CMD_SP(sc) = NULL; 1379 1380 spin_unlock_irqrestore(io_lock, flags); 1381 1382 /* 1383 * If there is a scsi_cmnd associated with this io_req, then 1384 * free the corresponding state 1385 */ 1386 start_time = io_req->start_time; 1387 fnic_release_ioreq_buf(fnic, io_req, sc); 1388 mempool_free(io_req, fnic->io_req_pool); 1389 1390 cleanup_scsi_cmd: 1391 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1392 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1393 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n", 1394 __func__, (jiffies - start_time)); 1395 1396 if (atomic64_read(&fnic->io_cmpl_skip)) 1397 atomic64_dec(&fnic->io_cmpl_skip); 1398 else 1399 atomic64_inc(&fnic_stats->io_stats.io_completions); 1400 1401 /* Complete the command to SCSI */ 1402 if (sc->scsi_done) { 1403 FNIC_TRACE(fnic_cleanup_io, 1404 sc->device->host->host_no, i, sc, 1405 jiffies_to_msecs(jiffies - start_time), 1406 0, ((u64)sc->cmnd[0] << 32 | 1407 (u64)sc->cmnd[2] << 24 | 1408 (u64)sc->cmnd[3] << 16 | 1409 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1410 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1411 1412 sc->scsi_done(sc); 1413 } 1414 } 1415 } 1416 1417 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1418 struct fcpio_host_req *desc) 1419 { 1420 u32 id; 1421 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1422 struct fnic_io_req *io_req; 1423 struct scsi_cmnd *sc; 1424 unsigned long flags; 1425 spinlock_t *io_lock; 1426 unsigned long start_time = 0; 1427 1428 /* get the tag reference */ 1429 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1430 id &= FNIC_TAG_MASK; 1431 1432 if (id >= fnic->fnic_max_tag_id) 1433 return; 1434 1435 sc = scsi_host_find_tag(fnic->lport->host, id); 1436 if (!sc) 1437 return; 1438 1439 io_lock = fnic_io_lock_hash(fnic, sc); 1440 spin_lock_irqsave(io_lock, flags); 1441 1442 /* Get the IO context which this desc refers to */ 1443 io_req = (struct fnic_io_req *)CMD_SP(sc); 1444 1445 /* fnic interrupts are turned off by now */ 1446 1447 if (!io_req) { 1448 spin_unlock_irqrestore(io_lock, flags); 1449 goto wq_copy_cleanup_scsi_cmd; 1450 } 1451 1452 CMD_SP(sc) = NULL; 1453 1454 spin_unlock_irqrestore(io_lock, flags); 1455 1456 start_time = io_req->start_time; 1457 fnic_release_ioreq_buf(fnic, io_req, sc); 1458 mempool_free(io_req, fnic->io_req_pool); 1459 1460 wq_copy_cleanup_scsi_cmd: 1461 sc->result = DID_NO_CONNECT << 16; 1462 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1463 " DID_NO_CONNECT\n"); 1464 1465 if (sc->scsi_done) { 1466 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1467 sc->device->host->host_no, id, sc, 1468 jiffies_to_msecs(jiffies - start_time), 1469 0, ((u64)sc->cmnd[0] << 32 | 1470 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1471 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1472 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1473 1474 sc->scsi_done(sc); 1475 } 1476 } 1477 1478 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1479 u32 task_req, u8 *fc_lun, 1480 struct fnic_io_req *io_req) 1481 { 1482 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1483 struct Scsi_Host *host = fnic->lport->host; 1484 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1485 unsigned long flags; 1486 1487 spin_lock_irqsave(host->host_lock, flags); 1488 if (unlikely(fnic_chk_state_flags_locked(fnic, 1489 FNIC_FLAGS_IO_BLOCKED))) { 1490 spin_unlock_irqrestore(host->host_lock, flags); 1491 return 1; 1492 } else 1493 atomic_inc(&fnic->in_flight); 1494 spin_unlock_irqrestore(host->host_lock, flags); 1495 1496 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1497 1498 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1499 free_wq_copy_descs(fnic, wq); 1500 1501 if (!vnic_wq_copy_desc_avail(wq)) { 1502 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1503 atomic_dec(&fnic->in_flight); 1504 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1505 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1506 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1507 return 1; 1508 } 1509 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1510 0, task_req, tag, fc_lun, io_req->port_id, 1511 fnic->config.ra_tov, fnic->config.ed_tov); 1512 1513 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1514 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1515 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1516 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1517 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1518 1519 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1520 atomic_dec(&fnic->in_flight); 1521 1522 return 0; 1523 } 1524 1525 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1526 { 1527 int tag; 1528 int abt_tag; 1529 int term_cnt = 0; 1530 struct fnic_io_req *io_req; 1531 spinlock_t *io_lock; 1532 unsigned long flags; 1533 struct scsi_cmnd *sc; 1534 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1535 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1536 struct scsi_lun fc_lun; 1537 enum fnic_ioreq_state old_ioreq_state; 1538 1539 FNIC_SCSI_DBG(KERN_DEBUG, 1540 fnic->lport->host, 1541 "fnic_rport_exch_reset called portid 0x%06x\n", 1542 port_id); 1543 1544 if (fnic->in_remove) 1545 return; 1546 1547 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1548 abt_tag = tag; 1549 io_lock = fnic_io_lock_tag(fnic, tag); 1550 spin_lock_irqsave(io_lock, flags); 1551 sc = scsi_host_find_tag(fnic->lport->host, tag); 1552 if (!sc) { 1553 spin_unlock_irqrestore(io_lock, flags); 1554 continue; 1555 } 1556 1557 io_req = (struct fnic_io_req *)CMD_SP(sc); 1558 1559 if (!io_req || io_req->port_id != port_id) { 1560 spin_unlock_irqrestore(io_lock, flags); 1561 continue; 1562 } 1563 1564 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1565 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1566 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1567 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1568 sc); 1569 spin_unlock_irqrestore(io_lock, flags); 1570 continue; 1571 } 1572 1573 /* 1574 * Found IO that is still pending with firmware and 1575 * belongs to rport that went away 1576 */ 1577 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1578 spin_unlock_irqrestore(io_lock, flags); 1579 continue; 1580 } 1581 if (io_req->abts_done) { 1582 shost_printk(KERN_ERR, fnic->lport->host, 1583 "fnic_rport_exch_reset: io_req->abts_done is set " 1584 "state is %s\n", 1585 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1586 } 1587 1588 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1589 shost_printk(KERN_ERR, fnic->lport->host, 1590 "rport_exch_reset " 1591 "IO not yet issued %p tag 0x%x flags " 1592 "%x state %d\n", 1593 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1594 } 1595 old_ioreq_state = CMD_STATE(sc); 1596 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1597 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1598 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1599 atomic64_inc(&reset_stats->device_reset_terminates); 1600 abt_tag = (tag | FNIC_TAG_DEV_RST); 1601 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1602 "fnic_rport_exch_reset dev rst sc 0x%p\n", 1603 sc); 1604 } 1605 1606 BUG_ON(io_req->abts_done); 1607 1608 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1609 "fnic_rport_reset_exch: Issuing abts\n"); 1610 1611 spin_unlock_irqrestore(io_lock, flags); 1612 1613 /* Now queue the abort command to firmware */ 1614 int_to_scsilun(sc->device->lun, &fc_lun); 1615 1616 if (fnic_queue_abort_io_req(fnic, abt_tag, 1617 FCPIO_ITMF_ABT_TASK_TERM, 1618 fc_lun.scsi_lun, io_req)) { 1619 /* 1620 * Revert the cmd state back to old state, if 1621 * it hasn't changed in between. This cmd will get 1622 * aborted later by scsi_eh, or cleaned up during 1623 * lun reset 1624 */ 1625 spin_lock_irqsave(io_lock, flags); 1626 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1627 CMD_STATE(sc) = old_ioreq_state; 1628 spin_unlock_irqrestore(io_lock, flags); 1629 } else { 1630 spin_lock_irqsave(io_lock, flags); 1631 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1632 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1633 else 1634 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1635 spin_unlock_irqrestore(io_lock, flags); 1636 atomic64_inc(&term_stats->terminates); 1637 term_cnt++; 1638 } 1639 } 1640 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1641 atomic64_set(&term_stats->max_terminates, term_cnt); 1642 1643 } 1644 1645 void fnic_terminate_rport_io(struct fc_rport *rport) 1646 { 1647 int tag; 1648 int abt_tag; 1649 int term_cnt = 0; 1650 struct fnic_io_req *io_req; 1651 spinlock_t *io_lock; 1652 unsigned long flags; 1653 struct scsi_cmnd *sc; 1654 struct scsi_lun fc_lun; 1655 struct fc_rport_libfc_priv *rdata; 1656 struct fc_lport *lport; 1657 struct fnic *fnic; 1658 struct fc_rport *cmd_rport; 1659 struct reset_stats *reset_stats; 1660 struct terminate_stats *term_stats; 1661 enum fnic_ioreq_state old_ioreq_state; 1662 1663 if (!rport) { 1664 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1665 return; 1666 } 1667 rdata = rport->dd_data; 1668 1669 if (!rdata) { 1670 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1671 return; 1672 } 1673 lport = rdata->local_port; 1674 1675 if (!lport) { 1676 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1677 return; 1678 } 1679 fnic = lport_priv(lport); 1680 FNIC_SCSI_DBG(KERN_DEBUG, 1681 fnic->lport->host, "fnic_terminate_rport_io called" 1682 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1683 rport->port_name, rport->node_name, rport, 1684 rport->port_id); 1685 1686 if (fnic->in_remove) 1687 return; 1688 1689 reset_stats = &fnic->fnic_stats.reset_stats; 1690 term_stats = &fnic->fnic_stats.term_stats; 1691 1692 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1693 abt_tag = tag; 1694 io_lock = fnic_io_lock_tag(fnic, tag); 1695 spin_lock_irqsave(io_lock, flags); 1696 sc = scsi_host_find_tag(fnic->lport->host, tag); 1697 if (!sc) { 1698 spin_unlock_irqrestore(io_lock, flags); 1699 continue; 1700 } 1701 1702 cmd_rport = starget_to_rport(scsi_target(sc->device)); 1703 if (rport != cmd_rport) { 1704 spin_unlock_irqrestore(io_lock, flags); 1705 continue; 1706 } 1707 1708 io_req = (struct fnic_io_req *)CMD_SP(sc); 1709 1710 if (!io_req || rport != cmd_rport) { 1711 spin_unlock_irqrestore(io_lock, flags); 1712 continue; 1713 } 1714 1715 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1716 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1717 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1718 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", 1719 sc); 1720 spin_unlock_irqrestore(io_lock, flags); 1721 continue; 1722 } 1723 /* 1724 * Found IO that is still pending with firmware and 1725 * belongs to rport that went away 1726 */ 1727 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1728 spin_unlock_irqrestore(io_lock, flags); 1729 continue; 1730 } 1731 if (io_req->abts_done) { 1732 shost_printk(KERN_ERR, fnic->lport->host, 1733 "fnic_terminate_rport_io: io_req->abts_done is set " 1734 "state is %s\n", 1735 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1736 } 1737 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1738 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1739 "fnic_terminate_rport_io " 1740 "IO not yet issued %p tag 0x%x flags " 1741 "%x state %d\n", 1742 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1743 } 1744 old_ioreq_state = CMD_STATE(sc); 1745 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1746 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1747 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1748 atomic64_inc(&reset_stats->device_reset_terminates); 1749 abt_tag = (tag | FNIC_TAG_DEV_RST); 1750 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1751 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); 1752 } 1753 1754 BUG_ON(io_req->abts_done); 1755 1756 FNIC_SCSI_DBG(KERN_DEBUG, 1757 fnic->lport->host, 1758 "fnic_terminate_rport_io: Issuing abts\n"); 1759 1760 spin_unlock_irqrestore(io_lock, flags); 1761 1762 /* Now queue the abort command to firmware */ 1763 int_to_scsilun(sc->device->lun, &fc_lun); 1764 1765 if (fnic_queue_abort_io_req(fnic, abt_tag, 1766 FCPIO_ITMF_ABT_TASK_TERM, 1767 fc_lun.scsi_lun, io_req)) { 1768 /* 1769 * Revert the cmd state back to old state, if 1770 * it hasn't changed in between. This cmd will get 1771 * aborted later by scsi_eh, or cleaned up during 1772 * lun reset 1773 */ 1774 spin_lock_irqsave(io_lock, flags); 1775 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1776 CMD_STATE(sc) = old_ioreq_state; 1777 spin_unlock_irqrestore(io_lock, flags); 1778 } else { 1779 spin_lock_irqsave(io_lock, flags); 1780 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1781 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1782 else 1783 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1784 spin_unlock_irqrestore(io_lock, flags); 1785 atomic64_inc(&term_stats->terminates); 1786 term_cnt++; 1787 } 1788 } 1789 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1790 atomic64_set(&term_stats->max_terminates, term_cnt); 1791 1792 } 1793 1794 /* 1795 * This function is exported to SCSI for sending abort cmnds. 1796 * A SCSI IO is represented by a io_req in the driver. 1797 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1798 */ 1799 int fnic_abort_cmd(struct scsi_cmnd *sc) 1800 { 1801 struct fc_lport *lp; 1802 struct fnic *fnic; 1803 struct fnic_io_req *io_req = NULL; 1804 struct fc_rport *rport; 1805 spinlock_t *io_lock; 1806 unsigned long flags; 1807 unsigned long start_time = 0; 1808 int ret = SUCCESS; 1809 u32 task_req = 0; 1810 struct scsi_lun fc_lun; 1811 struct fnic_stats *fnic_stats; 1812 struct abort_stats *abts_stats; 1813 struct terminate_stats *term_stats; 1814 enum fnic_ioreq_state old_ioreq_state; 1815 int tag; 1816 unsigned long abt_issued_time; 1817 DECLARE_COMPLETION_ONSTACK(tm_done); 1818 1819 /* Wait for rport to unblock */ 1820 fc_block_scsi_eh(sc); 1821 1822 /* Get local-port, check ready and link up */ 1823 lp = shost_priv(sc->device->host); 1824 1825 fnic = lport_priv(lp); 1826 fnic_stats = &fnic->fnic_stats; 1827 abts_stats = &fnic->fnic_stats.abts_stats; 1828 term_stats = &fnic->fnic_stats.term_stats; 1829 1830 rport = starget_to_rport(scsi_target(sc->device)); 1831 tag = sc->request->tag; 1832 FNIC_SCSI_DBG(KERN_DEBUG, 1833 fnic->lport->host, 1834 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1835 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1836 1837 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1838 1839 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1840 ret = FAILED; 1841 goto fnic_abort_cmd_end; 1842 } 1843 1844 /* 1845 * Avoid a race between SCSI issuing the abort and the device 1846 * completing the command. 1847 * 1848 * If the command is already completed by the fw cmpl code, 1849 * we just return SUCCESS from here. This means that the abort 1850 * succeeded. In the SCSI ML, since the timeout for command has 1851 * happened, the completion wont actually complete the command 1852 * and it will be considered as an aborted command 1853 * 1854 * The CMD_SP will not be cleared except while holding io_req_lock. 1855 */ 1856 io_lock = fnic_io_lock_hash(fnic, sc); 1857 spin_lock_irqsave(io_lock, flags); 1858 io_req = (struct fnic_io_req *)CMD_SP(sc); 1859 if (!io_req) { 1860 spin_unlock_irqrestore(io_lock, flags); 1861 goto fnic_abort_cmd_end; 1862 } 1863 1864 io_req->abts_done = &tm_done; 1865 1866 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1867 spin_unlock_irqrestore(io_lock, flags); 1868 goto wait_pending; 1869 } 1870 1871 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1872 if (abt_issued_time <= 6000) 1873 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1874 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1875 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1876 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1877 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1878 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1879 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1880 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1881 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1882 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1883 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1884 else 1885 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1886 1887 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1888 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1889 /* 1890 * Command is still pending, need to abort it 1891 * If the firmware completes the command after this point, 1892 * the completion wont be done till mid-layer, since abort 1893 * has already started. 1894 */ 1895 old_ioreq_state = CMD_STATE(sc); 1896 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1897 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1898 1899 spin_unlock_irqrestore(io_lock, flags); 1900 1901 /* 1902 * Check readiness of the remote port. If the path to remote 1903 * port is up, then send abts to the remote port to terminate 1904 * the IO. Else, just locally terminate the IO in the firmware 1905 */ 1906 if (fc_remote_port_chkready(rport) == 0) 1907 task_req = FCPIO_ITMF_ABT_TASK; 1908 else { 1909 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1910 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1911 } 1912 1913 /* Now queue the abort command to firmware */ 1914 int_to_scsilun(sc->device->lun, &fc_lun); 1915 1916 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1917 fc_lun.scsi_lun, io_req)) { 1918 spin_lock_irqsave(io_lock, flags); 1919 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1920 CMD_STATE(sc) = old_ioreq_state; 1921 io_req = (struct fnic_io_req *)CMD_SP(sc); 1922 if (io_req) 1923 io_req->abts_done = NULL; 1924 spin_unlock_irqrestore(io_lock, flags); 1925 ret = FAILED; 1926 goto fnic_abort_cmd_end; 1927 } 1928 if (task_req == FCPIO_ITMF_ABT_TASK) { 1929 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1930 atomic64_inc(&fnic_stats->abts_stats.aborts); 1931 } else { 1932 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1933 atomic64_inc(&fnic_stats->term_stats.terminates); 1934 } 1935 1936 /* 1937 * We queued an abort IO, wait for its completion. 1938 * Once the firmware completes the abort command, it will 1939 * wake up this thread. 1940 */ 1941 wait_pending: 1942 wait_for_completion_timeout(&tm_done, 1943 msecs_to_jiffies 1944 (2 * fnic->config.ra_tov + 1945 fnic->config.ed_tov)); 1946 1947 /* Check the abort status */ 1948 spin_lock_irqsave(io_lock, flags); 1949 1950 io_req = (struct fnic_io_req *)CMD_SP(sc); 1951 if (!io_req) { 1952 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1953 spin_unlock_irqrestore(io_lock, flags); 1954 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1955 ret = FAILED; 1956 goto fnic_abort_cmd_end; 1957 } 1958 io_req->abts_done = NULL; 1959 1960 /* fw did not complete abort, timed out */ 1961 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1962 spin_unlock_irqrestore(io_lock, flags); 1963 if (task_req == FCPIO_ITMF_ABT_TASK) { 1964 atomic64_inc(&abts_stats->abort_drv_timeouts); 1965 } else { 1966 atomic64_inc(&term_stats->terminate_drv_timeouts); 1967 } 1968 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 1969 ret = FAILED; 1970 goto fnic_abort_cmd_end; 1971 } 1972 1973 /* IO out of order */ 1974 1975 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1976 spin_unlock_irqrestore(io_lock, flags); 1977 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1978 "Issuing Host reset due to out of order IO\n"); 1979 1980 if (fnic_host_reset(sc) == FAILED) { 1981 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1982 "fnic_host_reset failed.\n"); 1983 } 1984 ret = FAILED; 1985 goto fnic_abort_cmd_end; 1986 } 1987 1988 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1989 1990 start_time = io_req->start_time; 1991 /* 1992 * firmware completed the abort, check the status, 1993 * free the io_req if successful. If abort fails, 1994 * Device reset will clean the I/O. 1995 */ 1996 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) 1997 CMD_SP(sc) = NULL; 1998 else { 1999 ret = FAILED; 2000 spin_unlock_irqrestore(io_lock, flags); 2001 goto fnic_abort_cmd_end; 2002 } 2003 2004 spin_unlock_irqrestore(io_lock, flags); 2005 2006 fnic_release_ioreq_buf(fnic, io_req, sc); 2007 mempool_free(io_req, fnic->io_req_pool); 2008 2009 if (sc->scsi_done) { 2010 /* Call SCSI completion function to complete the IO */ 2011 sc->result = (DID_ABORT << 16); 2012 sc->scsi_done(sc); 2013 atomic64_dec(&fnic_stats->io_stats.active_ios); 2014 if (atomic64_read(&fnic->io_cmpl_skip)) 2015 atomic64_dec(&fnic->io_cmpl_skip); 2016 else 2017 atomic64_inc(&fnic_stats->io_stats.io_completions); 2018 } 2019 2020 fnic_abort_cmd_end: 2021 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 2022 sc->request->tag, sc, 2023 jiffies_to_msecs(jiffies - start_time), 2024 0, ((u64)sc->cmnd[0] << 32 | 2025 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2026 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2027 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2028 2029 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2030 "Returning from abort cmd type %x %s\n", task_req, 2031 (ret == SUCCESS) ? 2032 "SUCCESS" : "FAILED"); 2033 return ret; 2034 } 2035 2036 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 2037 struct scsi_cmnd *sc, 2038 struct fnic_io_req *io_req) 2039 { 2040 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 2041 struct Scsi_Host *host = fnic->lport->host; 2042 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 2043 struct scsi_lun fc_lun; 2044 int ret = 0; 2045 unsigned long intr_flags; 2046 2047 spin_lock_irqsave(host->host_lock, intr_flags); 2048 if (unlikely(fnic_chk_state_flags_locked(fnic, 2049 FNIC_FLAGS_IO_BLOCKED))) { 2050 spin_unlock_irqrestore(host->host_lock, intr_flags); 2051 return FAILED; 2052 } else 2053 atomic_inc(&fnic->in_flight); 2054 spin_unlock_irqrestore(host->host_lock, intr_flags); 2055 2056 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 2057 2058 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 2059 free_wq_copy_descs(fnic, wq); 2060 2061 if (!vnic_wq_copy_desc_avail(wq)) { 2062 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2063 "queue_dr_io_req failure - no descriptors\n"); 2064 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 2065 ret = -EAGAIN; 2066 goto lr_io_req_end; 2067 } 2068 2069 /* fill in the lun info */ 2070 int_to_scsilun(sc->device->lun, &fc_lun); 2071 2072 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 2073 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 2074 fc_lun.scsi_lun, io_req->port_id, 2075 fnic->config.ra_tov, fnic->config.ed_tov); 2076 2077 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 2078 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 2079 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 2080 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 2081 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 2082 2083 lr_io_req_end: 2084 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 2085 atomic_dec(&fnic->in_flight); 2086 2087 return ret; 2088 } 2089 2090 /* 2091 * Clean up any pending aborts on the lun 2092 * For each outstanding IO on this lun, whose abort is not completed by fw, 2093 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2094 * successfully aborted, 1 otherwise 2095 */ 2096 static int fnic_clean_pending_aborts(struct fnic *fnic, 2097 struct scsi_cmnd *lr_sc, 2098 bool new_sc) 2099 2100 { 2101 int tag, abt_tag; 2102 struct fnic_io_req *io_req; 2103 spinlock_t *io_lock; 2104 unsigned long flags; 2105 int ret = 0; 2106 struct scsi_cmnd *sc; 2107 struct scsi_lun fc_lun; 2108 struct scsi_device *lun_dev = lr_sc->device; 2109 DECLARE_COMPLETION_ONSTACK(tm_done); 2110 enum fnic_ioreq_state old_ioreq_state; 2111 2112 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2113 io_lock = fnic_io_lock_tag(fnic, tag); 2114 spin_lock_irqsave(io_lock, flags); 2115 sc = scsi_host_find_tag(fnic->lport->host, tag); 2116 /* 2117 * ignore this lun reset cmd if issued using new SC 2118 * or cmds that do not belong to this lun 2119 */ 2120 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) { 2121 spin_unlock_irqrestore(io_lock, flags); 2122 continue; 2123 } 2124 2125 io_req = (struct fnic_io_req *)CMD_SP(sc); 2126 2127 if (!io_req || sc->device != lun_dev) { 2128 spin_unlock_irqrestore(io_lock, flags); 2129 continue; 2130 } 2131 2132 /* 2133 * Found IO that is still pending with firmware and 2134 * belongs to the LUN that we are resetting 2135 */ 2136 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2137 "Found IO in %s on lun\n", 2138 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2139 2140 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2141 spin_unlock_irqrestore(io_lock, flags); 2142 continue; 2143 } 2144 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 2145 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 2146 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2147 "%s dev rst not pending sc 0x%p\n", __func__, 2148 sc); 2149 spin_unlock_irqrestore(io_lock, flags); 2150 continue; 2151 } 2152 2153 if (io_req->abts_done) 2154 shost_printk(KERN_ERR, fnic->lport->host, 2155 "%s: io_req->abts_done is set state is %s\n", 2156 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 2157 old_ioreq_state = CMD_STATE(sc); 2158 /* 2159 * Any pending IO issued prior to reset is expected to be 2160 * in abts pending state, if not we need to set 2161 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2162 * When IO is completed, the IO will be handed over and 2163 * handled in this function. 2164 */ 2165 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2166 2167 BUG_ON(io_req->abts_done); 2168 2169 abt_tag = tag; 2170 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 2171 abt_tag |= FNIC_TAG_DEV_RST; 2172 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2173 "%s: dev rst sc 0x%p\n", __func__, sc); 2174 } 2175 2176 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 2177 io_req->abts_done = &tm_done; 2178 spin_unlock_irqrestore(io_lock, flags); 2179 2180 /* Now queue the abort command to firmware */ 2181 int_to_scsilun(sc->device->lun, &fc_lun); 2182 2183 if (fnic_queue_abort_io_req(fnic, abt_tag, 2184 FCPIO_ITMF_ABT_TASK_TERM, 2185 fc_lun.scsi_lun, io_req)) { 2186 spin_lock_irqsave(io_lock, flags); 2187 io_req = (struct fnic_io_req *)CMD_SP(sc); 2188 if (io_req) 2189 io_req->abts_done = NULL; 2190 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2191 CMD_STATE(sc) = old_ioreq_state; 2192 spin_unlock_irqrestore(io_lock, flags); 2193 ret = 1; 2194 goto clean_pending_aborts_end; 2195 } else { 2196 spin_lock_irqsave(io_lock, flags); 2197 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 2198 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2199 spin_unlock_irqrestore(io_lock, flags); 2200 } 2201 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 2202 2203 wait_for_completion_timeout(&tm_done, 2204 msecs_to_jiffies 2205 (fnic->config.ed_tov)); 2206 2207 /* Recheck cmd state to check if it is now aborted */ 2208 spin_lock_irqsave(io_lock, flags); 2209 io_req = (struct fnic_io_req *)CMD_SP(sc); 2210 if (!io_req) { 2211 spin_unlock_irqrestore(io_lock, flags); 2212 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 2213 continue; 2214 } 2215 2216 io_req->abts_done = NULL; 2217 2218 /* if abort is still pending with fw, fail */ 2219 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 2220 spin_unlock_irqrestore(io_lock, flags); 2221 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 2222 ret = 1; 2223 goto clean_pending_aborts_end; 2224 } 2225 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2226 2227 /* original sc used for lr is handled by dev reset code */ 2228 if (sc != lr_sc) 2229 CMD_SP(sc) = NULL; 2230 spin_unlock_irqrestore(io_lock, flags); 2231 2232 /* original sc used for lr is handled by dev reset code */ 2233 if (sc != lr_sc) { 2234 fnic_release_ioreq_buf(fnic, io_req, sc); 2235 mempool_free(io_req, fnic->io_req_pool); 2236 } 2237 2238 /* 2239 * Any IO is returned during reset, it needs to call scsi_done 2240 * to return the scsi_cmnd to upper layer. 2241 */ 2242 if (sc->scsi_done) { 2243 /* Set result to let upper SCSI layer retry */ 2244 sc->result = DID_RESET << 16; 2245 sc->scsi_done(sc); 2246 } 2247 } 2248 2249 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2250 2251 /* walk again to check, if IOs are still pending in fw */ 2252 if (fnic_is_abts_pending(fnic, lr_sc)) 2253 ret = FAILED; 2254 2255 clean_pending_aborts_end: 2256 return ret; 2257 } 2258 2259 /** 2260 * fnic_scsi_host_start_tag 2261 * Allocates tagid from host's tag list 2262 **/ 2263 static inline int 2264 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2265 { 2266 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 2267 int tag, ret = SCSI_NO_TAG; 2268 2269 BUG_ON(!bqt); 2270 if (!bqt) { 2271 pr_err("Tags are not supported\n"); 2272 goto end; 2273 } 2274 2275 do { 2276 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1); 2277 if (tag >= bqt->max_depth) { 2278 pr_err("Tag allocation failure\n"); 2279 goto end; 2280 } 2281 } while (test_and_set_bit(tag, bqt->tag_map)); 2282 2283 bqt->tag_index[tag] = sc->request; 2284 sc->request->tag = tag; 2285 sc->tag = tag; 2286 if (!sc->request->special) 2287 sc->request->special = sc; 2288 2289 ret = tag; 2290 2291 end: 2292 return ret; 2293 } 2294 2295 /** 2296 * fnic_scsi_host_end_tag 2297 * frees tag allocated by fnic_scsi_host_start_tag. 2298 **/ 2299 static inline void 2300 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2301 { 2302 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 2303 int tag = sc->request->tag; 2304 2305 if (tag == SCSI_NO_TAG) 2306 return; 2307 2308 BUG_ON(!bqt || !bqt->tag_index[tag]); 2309 if (!bqt) 2310 return; 2311 2312 bqt->tag_index[tag] = NULL; 2313 clear_bit(tag, bqt->tag_map); 2314 2315 return; 2316 } 2317 2318 /* 2319 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2320 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2321 * on the LUN. 2322 */ 2323 int fnic_device_reset(struct scsi_cmnd *sc) 2324 { 2325 struct fc_lport *lp; 2326 struct fnic *fnic; 2327 struct fnic_io_req *io_req = NULL; 2328 struct fc_rport *rport; 2329 int status; 2330 int ret = FAILED; 2331 spinlock_t *io_lock; 2332 unsigned long flags; 2333 unsigned long start_time = 0; 2334 struct scsi_lun fc_lun; 2335 struct fnic_stats *fnic_stats; 2336 struct reset_stats *reset_stats; 2337 int tag = 0; 2338 DECLARE_COMPLETION_ONSTACK(tm_done); 2339 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2340 bool new_sc = 0; 2341 2342 /* Wait for rport to unblock */ 2343 fc_block_scsi_eh(sc); 2344 2345 /* Get local-port, check ready and link up */ 2346 lp = shost_priv(sc->device->host); 2347 2348 fnic = lport_priv(lp); 2349 fnic_stats = &fnic->fnic_stats; 2350 reset_stats = &fnic->fnic_stats.reset_stats; 2351 2352 atomic64_inc(&reset_stats->device_resets); 2353 2354 rport = starget_to_rport(scsi_target(sc->device)); 2355 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2356 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2357 rport->port_id, sc->device->lun, sc); 2358 2359 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2360 goto fnic_device_reset_end; 2361 2362 /* Check if remote port up */ 2363 if (fc_remote_port_chkready(rport)) { 2364 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2365 goto fnic_device_reset_end; 2366 } 2367 2368 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2369 /* Allocate tag if not present */ 2370 2371 tag = sc->request->tag; 2372 if (unlikely(tag < 0)) { 2373 /* 2374 * XXX(hch): current the midlayer fakes up a struct 2375 * request for the explicit reset ioctls, and those 2376 * don't have a tag allocated to them. The below 2377 * code pokes into midlayer structures to paper over 2378 * this design issue, but that won't work for blk-mq. 2379 * 2380 * Either someone who can actually test the hardware 2381 * will have to come up with a similar hack for the 2382 * blk-mq case, or we'll have to bite the bullet and 2383 * fix the way the EH ioctls work for real, but until 2384 * that happens we fail these explicit requests here. 2385 */ 2386 2387 tag = fnic_scsi_host_start_tag(fnic, sc); 2388 if (unlikely(tag == SCSI_NO_TAG)) 2389 goto fnic_device_reset_end; 2390 tag_gen_flag = 1; 2391 new_sc = 1; 2392 } 2393 io_lock = fnic_io_lock_hash(fnic, sc); 2394 spin_lock_irqsave(io_lock, flags); 2395 io_req = (struct fnic_io_req *)CMD_SP(sc); 2396 2397 /* 2398 * If there is a io_req attached to this command, then use it, 2399 * else allocate a new one. 2400 */ 2401 if (!io_req) { 2402 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2403 if (!io_req) { 2404 spin_unlock_irqrestore(io_lock, flags); 2405 goto fnic_device_reset_end; 2406 } 2407 memset(io_req, 0, sizeof(*io_req)); 2408 io_req->port_id = rport->port_id; 2409 CMD_SP(sc) = (char *)io_req; 2410 } 2411 io_req->dr_done = &tm_done; 2412 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2413 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2414 spin_unlock_irqrestore(io_lock, flags); 2415 2416 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2417 2418 /* 2419 * issue the device reset, if enqueue failed, clean up the ioreq 2420 * and break assoc with scsi cmd 2421 */ 2422 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2423 spin_lock_irqsave(io_lock, flags); 2424 io_req = (struct fnic_io_req *)CMD_SP(sc); 2425 if (io_req) 2426 io_req->dr_done = NULL; 2427 goto fnic_device_reset_clean; 2428 } 2429 spin_lock_irqsave(io_lock, flags); 2430 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2431 spin_unlock_irqrestore(io_lock, flags); 2432 2433 /* 2434 * Wait on the local completion for LUN reset. The io_req may be 2435 * freed while we wait since we hold no lock. 2436 */ 2437 wait_for_completion_timeout(&tm_done, 2438 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2439 2440 spin_lock_irqsave(io_lock, flags); 2441 io_req = (struct fnic_io_req *)CMD_SP(sc); 2442 if (!io_req) { 2443 spin_unlock_irqrestore(io_lock, flags); 2444 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2445 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2446 goto fnic_device_reset_end; 2447 } 2448 io_req->dr_done = NULL; 2449 2450 status = CMD_LR_STATUS(sc); 2451 2452 /* 2453 * If lun reset not completed, bail out with failed. io_req 2454 * gets cleaned up during higher levels of EH 2455 */ 2456 if (status == FCPIO_INVALID_CODE) { 2457 atomic64_inc(&reset_stats->device_reset_timeouts); 2458 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2459 "Device reset timed out\n"); 2460 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2461 spin_unlock_irqrestore(io_lock, flags); 2462 int_to_scsilun(sc->device->lun, &fc_lun); 2463 /* 2464 * Issue abort and terminate on device reset request. 2465 * If q'ing of terminate fails, retry it after a delay. 2466 */ 2467 while (1) { 2468 spin_lock_irqsave(io_lock, flags); 2469 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2470 spin_unlock_irqrestore(io_lock, flags); 2471 break; 2472 } 2473 spin_unlock_irqrestore(io_lock, flags); 2474 if (fnic_queue_abort_io_req(fnic, 2475 tag | FNIC_TAG_DEV_RST, 2476 FCPIO_ITMF_ABT_TASK_TERM, 2477 fc_lun.scsi_lun, io_req)) { 2478 wait_for_completion_timeout(&tm_done, 2479 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2480 } else { 2481 spin_lock_irqsave(io_lock, flags); 2482 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2483 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2484 io_req->abts_done = &tm_done; 2485 spin_unlock_irqrestore(io_lock, flags); 2486 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2487 "Abort and terminate issued on Device reset " 2488 "tag 0x%x sc 0x%p\n", tag, sc); 2489 break; 2490 } 2491 } 2492 while (1) { 2493 spin_lock_irqsave(io_lock, flags); 2494 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2495 spin_unlock_irqrestore(io_lock, flags); 2496 wait_for_completion_timeout(&tm_done, 2497 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2498 break; 2499 } else { 2500 io_req = (struct fnic_io_req *)CMD_SP(sc); 2501 io_req->abts_done = NULL; 2502 goto fnic_device_reset_clean; 2503 } 2504 } 2505 } else { 2506 spin_unlock_irqrestore(io_lock, flags); 2507 } 2508 2509 /* Completed, but not successful, clean up the io_req, return fail */ 2510 if (status != FCPIO_SUCCESS) { 2511 spin_lock_irqsave(io_lock, flags); 2512 FNIC_SCSI_DBG(KERN_DEBUG, 2513 fnic->lport->host, 2514 "Device reset completed - failed\n"); 2515 io_req = (struct fnic_io_req *)CMD_SP(sc); 2516 goto fnic_device_reset_clean; 2517 } 2518 2519 /* 2520 * Clean up any aborts on this lun that have still not 2521 * completed. If any of these fail, then LUN reset fails. 2522 * clean_pending_aborts cleans all cmds on this lun except 2523 * the lun reset cmd. If all cmds get cleaned, the lun reset 2524 * succeeds 2525 */ 2526 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2527 spin_lock_irqsave(io_lock, flags); 2528 io_req = (struct fnic_io_req *)CMD_SP(sc); 2529 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2530 "Device reset failed" 2531 " since could not abort all IOs\n"); 2532 goto fnic_device_reset_clean; 2533 } 2534 2535 /* Clean lun reset command */ 2536 spin_lock_irqsave(io_lock, flags); 2537 io_req = (struct fnic_io_req *)CMD_SP(sc); 2538 if (io_req) 2539 /* Completed, and successful */ 2540 ret = SUCCESS; 2541 2542 fnic_device_reset_clean: 2543 if (io_req) 2544 CMD_SP(sc) = NULL; 2545 2546 spin_unlock_irqrestore(io_lock, flags); 2547 2548 if (io_req) { 2549 start_time = io_req->start_time; 2550 fnic_release_ioreq_buf(fnic, io_req, sc); 2551 mempool_free(io_req, fnic->io_req_pool); 2552 } 2553 2554 fnic_device_reset_end: 2555 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2556 sc->request->tag, sc, 2557 jiffies_to_msecs(jiffies - start_time), 2558 0, ((u64)sc->cmnd[0] << 32 | 2559 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2560 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2561 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2562 2563 /* free tag if it is allocated */ 2564 if (unlikely(tag_gen_flag)) 2565 fnic_scsi_host_end_tag(fnic, sc); 2566 2567 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2568 "Returning from device reset %s\n", 2569 (ret == SUCCESS) ? 2570 "SUCCESS" : "FAILED"); 2571 2572 if (ret == FAILED) 2573 atomic64_inc(&reset_stats->device_reset_failures); 2574 2575 return ret; 2576 } 2577 2578 /* Clean up all IOs, clean up libFC local port */ 2579 int fnic_reset(struct Scsi_Host *shost) 2580 { 2581 struct fc_lport *lp; 2582 struct fnic *fnic; 2583 int ret = 0; 2584 struct reset_stats *reset_stats; 2585 2586 lp = shost_priv(shost); 2587 fnic = lport_priv(lp); 2588 reset_stats = &fnic->fnic_stats.reset_stats; 2589 2590 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2591 "fnic_reset called\n"); 2592 2593 atomic64_inc(&reset_stats->fnic_resets); 2594 2595 /* 2596 * Reset local port, this will clean up libFC exchanges, 2597 * reset remote port sessions, and if link is up, begin flogi 2598 */ 2599 ret = fc_lport_reset(lp); 2600 2601 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2602 "Returning from fnic reset %s\n", 2603 (ret == 0) ? 2604 "SUCCESS" : "FAILED"); 2605 2606 if (ret == 0) 2607 atomic64_inc(&reset_stats->fnic_reset_completions); 2608 else 2609 atomic64_inc(&reset_stats->fnic_reset_failures); 2610 2611 return ret; 2612 } 2613 2614 /* 2615 * SCSI Error handling calls driver's eh_host_reset if all prior 2616 * error handling levels return FAILED. If host reset completes 2617 * successfully, and if link is up, then Fabric login begins. 2618 * 2619 * Host Reset is the highest level of error recovery. If this fails, then 2620 * host is offlined by SCSI. 2621 * 2622 */ 2623 int fnic_host_reset(struct scsi_cmnd *sc) 2624 { 2625 int ret; 2626 unsigned long wait_host_tmo; 2627 struct Scsi_Host *shost = sc->device->host; 2628 struct fc_lport *lp = shost_priv(shost); 2629 struct fnic *fnic = lport_priv(lp); 2630 unsigned long flags; 2631 2632 spin_lock_irqsave(&fnic->fnic_lock, flags); 2633 if (fnic->internal_reset_inprogress == 0) { 2634 fnic->internal_reset_inprogress = 1; 2635 } else { 2636 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2637 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2638 "host reset in progress skipping another host reset\n"); 2639 return SUCCESS; 2640 } 2641 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2642 2643 /* 2644 * If fnic_reset is successful, wait for fabric login to complete 2645 * scsi-ml tries to send a TUR to every device if host reset is 2646 * successful, so before returning to scsi, fabric should be up 2647 */ 2648 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2649 if (ret == SUCCESS) { 2650 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2651 ret = FAILED; 2652 while (time_before(jiffies, wait_host_tmo)) { 2653 if ((lp->state == LPORT_ST_READY) && 2654 (lp->link_up)) { 2655 ret = SUCCESS; 2656 break; 2657 } 2658 ssleep(1); 2659 } 2660 } 2661 2662 spin_lock_irqsave(&fnic->fnic_lock, flags); 2663 fnic->internal_reset_inprogress = 0; 2664 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2665 return ret; 2666 } 2667 2668 /* 2669 * This fxn is called from libFC when host is removed 2670 */ 2671 void fnic_scsi_abort_io(struct fc_lport *lp) 2672 { 2673 int err = 0; 2674 unsigned long flags; 2675 enum fnic_state old_state; 2676 struct fnic *fnic = lport_priv(lp); 2677 DECLARE_COMPLETION_ONSTACK(remove_wait); 2678 2679 /* Issue firmware reset for fnic, wait for reset to complete */ 2680 retry_fw_reset: 2681 spin_lock_irqsave(&fnic->fnic_lock, flags); 2682 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2683 /* fw reset is in progress, poll for its completion */ 2684 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2685 schedule_timeout(msecs_to_jiffies(100)); 2686 goto retry_fw_reset; 2687 } 2688 2689 fnic->remove_wait = &remove_wait; 2690 old_state = fnic->state; 2691 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2692 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2693 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2694 2695 err = fnic_fw_reset_handler(fnic); 2696 if (err) { 2697 spin_lock_irqsave(&fnic->fnic_lock, flags); 2698 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2699 fnic->state = old_state; 2700 fnic->remove_wait = NULL; 2701 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2702 return; 2703 } 2704 2705 /* Wait for firmware reset to complete */ 2706 wait_for_completion_timeout(&remove_wait, 2707 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2708 2709 spin_lock_irqsave(&fnic->fnic_lock, flags); 2710 fnic->remove_wait = NULL; 2711 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2712 "fnic_scsi_abort_io %s\n", 2713 (fnic->state == FNIC_IN_ETH_MODE) ? 2714 "SUCCESS" : "FAILED"); 2715 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2716 2717 } 2718 2719 /* 2720 * This fxn called from libFC to clean up driver IO state on link down 2721 */ 2722 void fnic_scsi_cleanup(struct fc_lport *lp) 2723 { 2724 unsigned long flags; 2725 enum fnic_state old_state; 2726 struct fnic *fnic = lport_priv(lp); 2727 2728 /* issue fw reset */ 2729 retry_fw_reset: 2730 spin_lock_irqsave(&fnic->fnic_lock, flags); 2731 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2732 /* fw reset is in progress, poll for its completion */ 2733 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2734 schedule_timeout(msecs_to_jiffies(100)); 2735 goto retry_fw_reset; 2736 } 2737 old_state = fnic->state; 2738 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2739 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2740 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2741 2742 if (fnic_fw_reset_handler(fnic)) { 2743 spin_lock_irqsave(&fnic->fnic_lock, flags); 2744 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2745 fnic->state = old_state; 2746 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2747 } 2748 2749 } 2750 2751 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2752 { 2753 } 2754 2755 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2756 { 2757 struct fnic *fnic = lport_priv(lp); 2758 2759 /* Non-zero sid, nothing to do */ 2760 if (sid) 2761 goto call_fc_exch_mgr_reset; 2762 2763 if (did) { 2764 fnic_rport_exch_reset(fnic, did); 2765 goto call_fc_exch_mgr_reset; 2766 } 2767 2768 /* 2769 * sid = 0, did = 0 2770 * link down or device being removed 2771 */ 2772 if (!fnic->in_remove) 2773 fnic_scsi_cleanup(lp); 2774 else 2775 fnic_scsi_abort_io(lp); 2776 2777 /* call libFC exch mgr reset to reset its exchanges */ 2778 call_fc_exch_mgr_reset: 2779 fc_exch_mgr_reset(lp, sid, did); 2780 2781 } 2782 2783 /* 2784 * fnic_is_abts_pending() is a helper function that 2785 * walks through tag map to check if there is any IOs pending,if there is one, 2786 * then it returns 1 (true), otherwise 0 (false) 2787 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2788 * otherwise, it checks for all IOs. 2789 */ 2790 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2791 { 2792 int tag; 2793 struct fnic_io_req *io_req; 2794 spinlock_t *io_lock; 2795 unsigned long flags; 2796 int ret = 0; 2797 struct scsi_cmnd *sc; 2798 struct scsi_device *lun_dev = NULL; 2799 2800 if (lr_sc) 2801 lun_dev = lr_sc->device; 2802 2803 /* walk again to check, if IOs are still pending in fw */ 2804 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2805 sc = scsi_host_find_tag(fnic->lport->host, tag); 2806 /* 2807 * ignore this lun reset cmd or cmds that do not belong to 2808 * this lun 2809 */ 2810 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) 2811 continue; 2812 2813 io_lock = fnic_io_lock_hash(fnic, sc); 2814 spin_lock_irqsave(io_lock, flags); 2815 2816 io_req = (struct fnic_io_req *)CMD_SP(sc); 2817 2818 if (!io_req || sc->device != lun_dev) { 2819 spin_unlock_irqrestore(io_lock, flags); 2820 continue; 2821 } 2822 2823 /* 2824 * Found IO that is still pending with firmware and 2825 * belongs to the LUN that we are resetting 2826 */ 2827 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2828 "Found IO in %s on lun\n", 2829 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2830 2831 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2832 ret = 1; 2833 spin_unlock_irqrestore(io_lock, flags); 2834 } 2835 2836 return ret; 2837 } 2838