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