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