1 /* 2 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 */ 18 #include <linux/mempool.h> 19 #include <linux/errno.h> 20 #include <linux/init.h> 21 #include <linux/workqueue.h> 22 #include <linux/pci.h> 23 #include <linux/scatterlist.h> 24 #include <linux/skbuff.h> 25 #include <linux/spinlock.h> 26 #include <linux/if_ether.h> 27 #include <linux/if_vlan.h> 28 #include <linux/delay.h> 29 #include <linux/gfp.h> 30 #include <scsi/scsi.h> 31 #include <scsi/scsi_host.h> 32 #include <scsi/scsi_device.h> 33 #include <scsi/scsi_cmnd.h> 34 #include <scsi/scsi_tcq.h> 35 #include <scsi/fc/fc_els.h> 36 #include <scsi/fc/fc_fcoe.h> 37 #include <scsi/libfc.h> 38 #include <scsi/fc_frame.h> 39 #include "fnic_io.h" 40 #include "fnic.h" 41 42 const char *fnic_state_str[] = { 43 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE", 44 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE", 45 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE", 46 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE", 47 }; 48 49 static const char *fnic_ioreq_state_str[] = { 50 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED", 51 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING", 52 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING", 53 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE", 54 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE", 55 }; 56 57 static const char *fcpio_status_str[] = { 58 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/ 59 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER", 60 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE", 61 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]", 62 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED", 63 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND", 64 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/ 65 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT", 66 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID", 67 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID", 68 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH", 69 [FCPIO_FW_ERR] = "FCPIO_FW_ERR", 70 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED", 71 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED", 72 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN", 73 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED", 74 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL", 75 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED", 76 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", 77 }; 78 79 const char *fnic_state_to_str(unsigned int state) 80 { 81 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) 82 return "unknown"; 83 84 return fnic_state_str[state]; 85 } 86 87 static const char *fnic_ioreq_state_to_str(unsigned int state) 88 { 89 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) || 90 !fnic_ioreq_state_str[state]) 91 return "unknown"; 92 93 return fnic_ioreq_state_str[state]; 94 } 95 96 static const char *fnic_fcpio_status_to_str(unsigned int status) 97 { 98 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status]) 99 return "unknown"; 100 101 return fcpio_status_str[status]; 102 } 103 104 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id); 105 106 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic, 107 struct scsi_cmnd *sc) 108 { 109 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1); 110 111 return &fnic->io_req_lock[hash]; 112 } 113 114 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic, 115 int tag) 116 { 117 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)]; 118 } 119 120 /* 121 * Unmap the data buffer and sense buffer for an io_req, 122 * also unmap and free the device-private scatter/gather list. 123 */ 124 static void fnic_release_ioreq_buf(struct fnic *fnic, 125 struct fnic_io_req *io_req, 126 struct scsi_cmnd *sc) 127 { 128 if (io_req->sgl_list_pa) 129 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa, 130 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, 131 PCI_DMA_TODEVICE); 132 scsi_dma_unmap(sc); 133 134 if (io_req->sgl_cnt) 135 mempool_free(io_req->sgl_list_alloc, 136 fnic->io_sgl_pool[io_req->sgl_type]); 137 if (io_req->sense_buf_pa) 138 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa, 139 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE); 140 } 141 142 /* Free up Copy Wq descriptors. Called with copy_wq lock held */ 143 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq) 144 { 145 /* if no Ack received from firmware, then nothing to clean */ 146 if (!fnic->fw_ack_recd[0]) 147 return 1; 148 149 /* 150 * Update desc_available count based on number of freed descriptors 151 * Account for wraparound 152 */ 153 if (wq->to_clean_index <= fnic->fw_ack_index[0]) 154 wq->ring.desc_avail += (fnic->fw_ack_index[0] 155 - wq->to_clean_index + 1); 156 else 157 wq->ring.desc_avail += (wq->ring.desc_count 158 - wq->to_clean_index 159 + fnic->fw_ack_index[0] + 1); 160 161 /* 162 * just bump clean index to ack_index+1 accounting for wraparound 163 * this will essentially free up all descriptors between 164 * to_clean_index and fw_ack_index, both inclusive 165 */ 166 wq->to_clean_index = 167 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count; 168 169 /* we have processed the acks received so far */ 170 fnic->fw_ack_recd[0] = 0; 171 return 0; 172 } 173 174 175 /** 176 * __fnic_set_state_flags 177 * Sets/Clears bits in fnic's state_flags 178 **/ 179 void 180 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags, 181 unsigned long clearbits) 182 { 183 struct Scsi_Host *host = fnic->lport->host; 184 int sh_locked = spin_is_locked(host->host_lock); 185 unsigned long flags = 0; 186 187 if (!sh_locked) 188 spin_lock_irqsave(host->host_lock, flags); 189 190 if (clearbits) 191 fnic->state_flags &= ~st_flags; 192 else 193 fnic->state_flags |= st_flags; 194 195 if (!sh_locked) 196 spin_unlock_irqrestore(host->host_lock, flags); 197 198 return; 199 } 200 201 202 /* 203 * fnic_fw_reset_handler 204 * Routine to send reset msg to fw 205 */ 206 int fnic_fw_reset_handler(struct fnic *fnic) 207 { 208 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 209 int ret = 0; 210 unsigned long flags; 211 212 /* indicate fwreset to io path */ 213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); 214 215 skb_queue_purge(&fnic->frame_queue); 216 skb_queue_purge(&fnic->tx_queue); 217 218 /* wait for io cmpl */ 219 while (atomic_read(&fnic->in_flight)) 220 schedule_timeout(msecs_to_jiffies(1)); 221 222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 223 224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 225 free_wq_copy_descs(fnic, wq); 226 227 if (!vnic_wq_copy_desc_avail(wq)) 228 ret = -EAGAIN; 229 else { 230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); 231 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 232 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 233 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 234 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 235 atomic64_read( 236 &fnic->fnic_stats.fw_stats.active_fw_reqs)); 237 } 238 239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 240 241 if (!ret) { 242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets); 243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 244 "Issued fw reset\n"); 245 } else { 246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 248 "Failed to issue fw reset\n"); 249 } 250 251 return ret; 252 } 253 254 255 /* 256 * fnic_flogi_reg_handler 257 * Routine to send flogi register msg to fw 258 */ 259 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) 260 { 261 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 262 enum fcpio_flogi_reg_format_type format; 263 struct fc_lport *lp = fnic->lport; 264 u8 gw_mac[ETH_ALEN]; 265 int ret = 0; 266 unsigned long flags; 267 268 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 269 270 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 271 free_wq_copy_descs(fnic, wq); 272 273 if (!vnic_wq_copy_desc_avail(wq)) { 274 ret = -EAGAIN; 275 goto flogi_reg_ioreq_end; 276 } 277 278 if (fnic->ctlr.map_dest) { 279 memset(gw_mac, 0xff, ETH_ALEN); 280 format = FCPIO_FLOGI_REG_DEF_DEST; 281 } else { 282 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); 283 format = FCPIO_FLOGI_REG_GW_DEST; 284 } 285 286 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { 287 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, 288 fc_id, gw_mac, 289 fnic->data_src_addr, 290 lp->r_a_tov, lp->e_d_tov); 291 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 292 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", 293 fc_id, fnic->data_src_addr, gw_mac); 294 } else { 295 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, 296 format, fc_id, gw_mac); 297 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 298 "FLOGI reg issued fcid %x map %d dest %pM\n", 299 fc_id, fnic->ctlr.map_dest, gw_mac); 300 } 301 302 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 303 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 304 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 305 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 306 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 307 308 flogi_reg_ioreq_end: 309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 310 return ret; 311 } 312 313 /* 314 * fnic_queue_wq_copy_desc 315 * Routine to enqueue a wq copy desc 316 */ 317 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, 318 struct vnic_wq_copy *wq, 319 struct fnic_io_req *io_req, 320 struct scsi_cmnd *sc, 321 int sg_count) 322 { 323 struct scatterlist *sg; 324 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); 325 struct fc_rport_libfc_priv *rp = rport->dd_data; 326 struct host_sg_desc *desc; 327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 328 unsigned int i; 329 unsigned long intr_flags; 330 int flags; 331 u8 exch_flags; 332 struct scsi_lun fc_lun; 333 int r; 334 335 if (sg_count) { 336 /* For each SGE, create a device desc entry */ 337 desc = io_req->sgl_list; 338 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 339 desc->addr = cpu_to_le64(sg_dma_address(sg)); 340 desc->len = cpu_to_le32(sg_dma_len(sg)); 341 desc->_resvd = 0; 342 desc++; 343 } 344 345 io_req->sgl_list_pa = pci_map_single 346 (fnic->pdev, 347 io_req->sgl_list, 348 sizeof(io_req->sgl_list[0]) * sg_count, 349 PCI_DMA_TODEVICE); 350 351 r = pci_dma_mapping_error(fnic->pdev, io_req->sgl_list_pa); 352 if (r) { 353 printk(KERN_ERR "PCI mapping failed with error %d\n", r); 354 return SCSI_MLQUEUE_HOST_BUSY; 355 } 356 } 357 358 io_req->sense_buf_pa = pci_map_single(fnic->pdev, 359 sc->sense_buffer, 360 SCSI_SENSE_BUFFERSIZE, 361 PCI_DMA_FROMDEVICE); 362 363 r = pci_dma_mapping_error(fnic->pdev, io_req->sense_buf_pa); 364 if (r) { 365 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa, 366 sizeof(io_req->sgl_list[0]) * sg_count, 367 PCI_DMA_TODEVICE); 368 printk(KERN_ERR "PCI mapping failed with error %d\n", r); 369 return SCSI_MLQUEUE_HOST_BUSY; 370 } 371 372 int_to_scsilun(sc->device->lun, &fc_lun); 373 374 /* Enqueue the descriptor in the Copy WQ */ 375 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 376 377 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 378 free_wq_copy_descs(fnic, wq); 379 380 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 381 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 382 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 383 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 384 atomic64_inc(&misc_stats->io_cpwq_alloc_failures); 385 return SCSI_MLQUEUE_HOST_BUSY; 386 } 387 388 flags = 0; 389 if (sc->sc_data_direction == DMA_FROM_DEVICE) 390 flags = FCPIO_ICMND_RDDATA; 391 else if (sc->sc_data_direction == DMA_TO_DEVICE) 392 flags = FCPIO_ICMND_WRDATA; 393 394 exch_flags = 0; 395 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 396 (rp->flags & FC_RP_FLAGS_RETRY)) 397 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 398 399 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, 400 0, exch_flags, io_req->sgl_cnt, 401 SCSI_SENSE_BUFFERSIZE, 402 io_req->sgl_list_pa, 403 io_req->sense_buf_pa, 404 0, /* scsi cmd ref, always 0 */ 405 FCPIO_ICMND_PTA_SIMPLE, 406 /* scsi pri and tag */ 407 flags, /* command flags */ 408 sc->cmnd, sc->cmd_len, 409 scsi_bufflen(sc), 410 fc_lun.scsi_lun, io_req->port_id, 411 rport->maxframe_size, rp->r_a_tov, 412 rp->e_d_tov); 413 414 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 415 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 416 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 417 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 418 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 419 420 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 421 return 0; 422 } 423 424 /* 425 * fnic_queuecommand 426 * Routine to send a scsi cdb 427 * Called with host_lock held and interrupts disabled. 428 */ 429 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) 430 { 431 struct fc_lport *lp = shost_priv(sc->device->host); 432 struct fc_rport *rport; 433 struct fnic_io_req *io_req = NULL; 434 struct fnic *fnic = lport_priv(lp); 435 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 436 struct vnic_wq_copy *wq; 437 int ret; 438 u64 cmd_trace; 439 int sg_count = 0; 440 unsigned long flags = 0; 441 unsigned long ptr; 442 spinlock_t *io_lock = NULL; 443 int io_lock_acquired = 0; 444 struct fc_rport_libfc_priv *rp; 445 446 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 447 return SCSI_MLQUEUE_HOST_BUSY; 448 449 rport = starget_to_rport(scsi_target(sc->device)); 450 if (!rport) { 451 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 452 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 453 sc->result = DID_NO_CONNECT << 16; 454 done(sc); 455 return 0; 456 } 457 458 ret = fc_remote_port_chkready(rport); 459 if (ret) { 460 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 461 "rport is not ready\n"); 462 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 463 sc->result = ret; 464 done(sc); 465 return 0; 466 } 467 468 rp = rport->dd_data; 469 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 470 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 471 "rport 0x%x removed, returning DID_NO_CONNECT\n", 472 rport->port_id); 473 474 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 475 sc->result = DID_NO_CONNECT<<16; 476 done(sc); 477 return 0; 478 } 479 480 if (rp->rp_state != RPORT_ST_READY) { 481 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 482 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 483 rport->port_id, rp->rp_state); 484 485 sc->result = DID_IMM_RETRY << 16; 486 done(sc); 487 return 0; 488 } 489 490 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 491 return SCSI_MLQUEUE_HOST_BUSY; 492 493 atomic_inc(&fnic->in_flight); 494 495 /* 496 * Release host lock, use driver resource specific locks from here. 497 * Don't re-enable interrupts in case they were disabled prior to the 498 * caller disabling them. 499 */ 500 spin_unlock(lp->host->host_lock); 501 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 502 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 503 504 /* Get a new io_req for this SCSI IO */ 505 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 506 if (!io_req) { 507 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 508 ret = SCSI_MLQUEUE_HOST_BUSY; 509 goto out; 510 } 511 memset(io_req, 0, sizeof(*io_req)); 512 513 /* Map the data buffer */ 514 sg_count = scsi_dma_map(sc); 515 if (sg_count < 0) { 516 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 517 sc->request->tag, sc, 0, sc->cmnd[0], 518 sg_count, CMD_STATE(sc)); 519 mempool_free(io_req, fnic->io_req_pool); 520 goto out; 521 } 522 523 /* Determine the type of scatter/gather list we need */ 524 io_req->sgl_cnt = sg_count; 525 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 526 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 527 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 528 529 if (sg_count) { 530 io_req->sgl_list = 531 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 532 GFP_ATOMIC); 533 if (!io_req->sgl_list) { 534 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 535 ret = SCSI_MLQUEUE_HOST_BUSY; 536 scsi_dma_unmap(sc); 537 mempool_free(io_req, fnic->io_req_pool); 538 goto out; 539 } 540 541 /* Cache sgl list allocated address before alignment */ 542 io_req->sgl_list_alloc = io_req->sgl_list; 543 ptr = (unsigned long) io_req->sgl_list; 544 if (ptr % FNIC_SG_DESC_ALIGN) { 545 io_req->sgl_list = (struct host_sg_desc *) 546 (((unsigned long) ptr 547 + FNIC_SG_DESC_ALIGN - 1) 548 & ~(FNIC_SG_DESC_ALIGN - 1)); 549 } 550 } 551 552 /* 553 * Will acquire lock defore setting to IO initialized. 554 */ 555 556 io_lock = fnic_io_lock_hash(fnic, sc); 557 spin_lock_irqsave(io_lock, flags); 558 559 /* initialize rest of io_req */ 560 io_lock_acquired = 1; 561 io_req->port_id = rport->port_id; 562 io_req->start_time = jiffies; 563 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 564 CMD_SP(sc) = (char *)io_req; 565 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; 566 sc->scsi_done = done; 567 568 /* create copy wq desc and enqueue it */ 569 wq = &fnic->wq_copy[0]; 570 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 571 if (ret) { 572 /* 573 * In case another thread cancelled the request, 574 * refetch the pointer under the lock. 575 */ 576 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 577 sc->request->tag, sc, 0, 0, 0, 578 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 579 io_req = (struct fnic_io_req *)CMD_SP(sc); 580 CMD_SP(sc) = NULL; 581 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 582 spin_unlock_irqrestore(io_lock, flags); 583 if (io_req) { 584 fnic_release_ioreq_buf(fnic, io_req, sc); 585 mempool_free(io_req, fnic->io_req_pool); 586 } 587 atomic_dec(&fnic->in_flight); 588 /* acquire host lock before returning to SCSI */ 589 spin_lock(lp->host->host_lock); 590 return ret; 591 } else { 592 atomic64_inc(&fnic_stats->io_stats.active_ios); 593 atomic64_inc(&fnic_stats->io_stats.num_ios); 594 if (atomic64_read(&fnic_stats->io_stats.active_ios) > 595 atomic64_read(&fnic_stats->io_stats.max_active_ios)) 596 atomic64_set(&fnic_stats->io_stats.max_active_ios, 597 atomic64_read(&fnic_stats->io_stats.active_ios)); 598 599 /* REVISIT: Use per IO lock in the final code */ 600 CMD_FLAGS(sc) |= FNIC_IO_ISSUED; 601 } 602 out: 603 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 604 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 605 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 606 sc->cmnd[5]); 607 608 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 609 sc->request->tag, sc, io_req, 610 sg_count, cmd_trace, 611 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); 612 613 /* if only we issued IO, will we have the io lock */ 614 if (io_lock_acquired) 615 spin_unlock_irqrestore(io_lock, flags); 616 617 atomic_dec(&fnic->in_flight); 618 /* acquire host lock before returning to SCSI */ 619 spin_lock(lp->host->host_lock); 620 return ret; 621 } 622 623 DEF_SCSI_QCMD(fnic_queuecommand) 624 625 /* 626 * fnic_fcpio_fw_reset_cmpl_handler 627 * Routine to handle fw reset completion 628 */ 629 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 630 struct fcpio_fw_req *desc) 631 { 632 u8 type; 633 u8 hdr_status; 634 struct fcpio_tag tag; 635 int ret = 0; 636 unsigned long flags; 637 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 638 639 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 640 641 atomic64_inc(&reset_stats->fw_reset_completions); 642 643 /* Clean up all outstanding io requests */ 644 fnic_cleanup_io(fnic, SCSI_NO_TAG); 645 646 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 647 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 648 atomic64_set(&fnic->io_cmpl_skip, 0); 649 650 spin_lock_irqsave(&fnic->fnic_lock, flags); 651 652 /* fnic should be in FC_TRANS_ETH_MODE */ 653 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 654 /* Check status of reset completion */ 655 if (!hdr_status) { 656 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 657 "reset cmpl success\n"); 658 /* Ready to send flogi out */ 659 fnic->state = FNIC_IN_ETH_MODE; 660 } else { 661 FNIC_SCSI_DBG(KERN_DEBUG, 662 fnic->lport->host, 663 "fnic fw_reset : failed %s\n", 664 fnic_fcpio_status_to_str(hdr_status)); 665 666 /* 667 * Unable to change to eth mode, cannot send out flogi 668 * Change state to fc mode, so that subsequent Flogi 669 * requests from libFC will cause more attempts to 670 * reset the firmware. Free the cached flogi 671 */ 672 fnic->state = FNIC_IN_FC_MODE; 673 atomic64_inc(&reset_stats->fw_reset_failures); 674 ret = -1; 675 } 676 } else { 677 FNIC_SCSI_DBG(KERN_DEBUG, 678 fnic->lport->host, 679 "Unexpected state %s while processing" 680 " reset cmpl\n", fnic_state_to_str(fnic->state)); 681 atomic64_inc(&reset_stats->fw_reset_failures); 682 ret = -1; 683 } 684 685 /* Thread removing device blocks till firmware reset is complete */ 686 if (fnic->remove_wait) 687 complete(fnic->remove_wait); 688 689 /* 690 * If fnic is being removed, or fw reset failed 691 * free the flogi frame. Else, send it out 692 */ 693 if (fnic->remove_wait || ret) { 694 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 695 skb_queue_purge(&fnic->tx_queue); 696 goto reset_cmpl_handler_end; 697 } 698 699 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 700 701 fnic_flush_tx(fnic); 702 703 reset_cmpl_handler_end: 704 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 705 706 return ret; 707 } 708 709 /* 710 * fnic_fcpio_flogi_reg_cmpl_handler 711 * Routine to handle flogi register completion 712 */ 713 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 714 struct fcpio_fw_req *desc) 715 { 716 u8 type; 717 u8 hdr_status; 718 struct fcpio_tag tag; 719 int ret = 0; 720 unsigned long flags; 721 722 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 723 724 /* Update fnic state based on status of flogi reg completion */ 725 spin_lock_irqsave(&fnic->fnic_lock, flags); 726 727 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 728 729 /* Check flogi registration completion status */ 730 if (!hdr_status) { 731 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 732 "flog reg succeeded\n"); 733 fnic->state = FNIC_IN_FC_MODE; 734 } else { 735 FNIC_SCSI_DBG(KERN_DEBUG, 736 fnic->lport->host, 737 "fnic flogi reg :failed %s\n", 738 fnic_fcpio_status_to_str(hdr_status)); 739 fnic->state = FNIC_IN_ETH_MODE; 740 ret = -1; 741 } 742 } else { 743 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 744 "Unexpected fnic state %s while" 745 " processing flogi reg completion\n", 746 fnic_state_to_str(fnic->state)); 747 ret = -1; 748 } 749 750 if (!ret) { 751 if (fnic->stop_rx_link_events) { 752 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 753 goto reg_cmpl_handler_end; 754 } 755 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 756 757 fnic_flush_tx(fnic); 758 queue_work(fnic_event_queue, &fnic->frame_work); 759 } else { 760 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 761 } 762 763 reg_cmpl_handler_end: 764 return ret; 765 } 766 767 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 768 u16 request_out) 769 { 770 if (wq->to_clean_index <= wq->to_use_index) { 771 /* out of range, stale request_out index */ 772 if (request_out < wq->to_clean_index || 773 request_out >= wq->to_use_index) 774 return 0; 775 } else { 776 /* out of range, stale request_out index */ 777 if (request_out < wq->to_clean_index && 778 request_out >= wq->to_use_index) 779 return 0; 780 } 781 /* request_out index is in range */ 782 return 1; 783 } 784 785 786 /* 787 * Mark that ack received and store the Ack index. If there are multiple 788 * acks received before Tx thread cleans it up, the latest value will be 789 * used which is correct behavior. This state should be in the copy Wq 790 * instead of in the fnic 791 */ 792 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 793 unsigned int cq_index, 794 struct fcpio_fw_req *desc) 795 { 796 struct vnic_wq_copy *wq; 797 u16 request_out = desc->u.ack.request_out; 798 unsigned long flags; 799 u64 *ox_id_tag = (u64 *)(void *)desc; 800 801 /* mark the ack state */ 802 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 803 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 804 805 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 806 if (is_ack_index_in_range(wq, request_out)) { 807 fnic->fw_ack_index[0] = request_out; 808 fnic->fw_ack_recd[0] = 1; 809 } else 810 atomic64_inc( 811 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 812 813 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 814 FNIC_TRACE(fnic_fcpio_ack_handler, 815 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 816 ox_id_tag[4], ox_id_tag[5]); 817 } 818 819 /* 820 * fnic_fcpio_icmnd_cmpl_handler 821 * Routine to handle icmnd completions 822 */ 823 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 824 struct fcpio_fw_req *desc) 825 { 826 u8 type; 827 u8 hdr_status; 828 struct fcpio_tag tag; 829 u32 id; 830 u64 xfer_len = 0; 831 struct fcpio_icmnd_cmpl *icmnd_cmpl; 832 struct fnic_io_req *io_req; 833 struct scsi_cmnd *sc; 834 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 835 unsigned long flags; 836 spinlock_t *io_lock; 837 u64 cmd_trace; 838 unsigned long start_time; 839 unsigned long io_duration_time; 840 841 /* Decode the cmpl description to get the io_req id */ 842 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 843 fcpio_tag_id_dec(&tag, &id); 844 icmnd_cmpl = &desc->u.icmnd_cmpl; 845 846 if (id >= fnic->fnic_max_tag_id) { 847 shost_printk(KERN_ERR, fnic->lport->host, 848 "Tag out of range tag %x hdr status = %s\n", 849 id, fnic_fcpio_status_to_str(hdr_status)); 850 return; 851 } 852 853 sc = scsi_host_find_tag(fnic->lport->host, id); 854 WARN_ON_ONCE(!sc); 855 if (!sc) { 856 atomic64_inc(&fnic_stats->io_stats.sc_null); 857 shost_printk(KERN_ERR, fnic->lport->host, 858 "icmnd_cmpl sc is null - " 859 "hdr status = %s tag = 0x%x desc = 0x%p\n", 860 fnic_fcpio_status_to_str(hdr_status), id, desc); 861 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 862 fnic->lport->host->host_no, id, 863 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 864 (u64)icmnd_cmpl->_resvd0[0]), 865 ((u64)hdr_status << 16 | 866 (u64)icmnd_cmpl->scsi_status << 8 | 867 (u64)icmnd_cmpl->flags), desc, 868 (u64)icmnd_cmpl->residual, 0); 869 return; 870 } 871 872 io_lock = fnic_io_lock_hash(fnic, sc); 873 spin_lock_irqsave(io_lock, flags); 874 io_req = (struct fnic_io_req *)CMD_SP(sc); 875 WARN_ON_ONCE(!io_req); 876 if (!io_req) { 877 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 878 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; 879 spin_unlock_irqrestore(io_lock, flags); 880 shost_printk(KERN_ERR, fnic->lport->host, 881 "icmnd_cmpl io_req is null - " 882 "hdr status = %s tag = 0x%x sc 0x%p\n", 883 fnic_fcpio_status_to_str(hdr_status), id, sc); 884 return; 885 } 886 start_time = io_req->start_time; 887 888 /* firmware completed the io */ 889 io_req->io_completed = 1; 890 891 /* 892 * if SCSI-ML has already issued abort on this command, 893 * set completion of the IO. The abts path will clean it up 894 */ 895 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 896 897 /* 898 * set the FNIC_IO_DONE so that this doesn't get 899 * flagged as 'out of order' if it was not aborted 900 */ 901 CMD_FLAGS(sc) |= FNIC_IO_DONE; 902 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 903 spin_unlock_irqrestore(io_lock, flags); 904 if(FCPIO_ABORTED == hdr_status) 905 CMD_FLAGS(sc) |= FNIC_IO_ABORTED; 906 907 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 908 "icmnd_cmpl abts pending " 909 "hdr status = %s tag = 0x%x sc = 0x%p" 910 "scsi_status = %x residual = %d\n", 911 fnic_fcpio_status_to_str(hdr_status), 912 id, sc, 913 icmnd_cmpl->scsi_status, 914 icmnd_cmpl->residual); 915 return; 916 } 917 918 /* Mark the IO as complete */ 919 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 920 921 icmnd_cmpl = &desc->u.icmnd_cmpl; 922 923 switch (hdr_status) { 924 case FCPIO_SUCCESS: 925 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 926 xfer_len = scsi_bufflen(sc); 927 scsi_set_resid(sc, icmnd_cmpl->residual); 928 929 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) 930 xfer_len -= icmnd_cmpl->residual; 931 932 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) 933 atomic64_inc(&fnic_stats->misc_stats.check_condition); 934 935 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 936 atomic64_inc(&fnic_stats->misc_stats.queue_fulls); 937 break; 938 939 case FCPIO_TIMEOUT: /* request was timed out */ 940 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); 941 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 942 break; 943 944 case FCPIO_ABORTED: /* request was aborted */ 945 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); 946 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 947 break; 948 949 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 950 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); 951 scsi_set_resid(sc, icmnd_cmpl->residual); 952 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 953 break; 954 955 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 956 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); 957 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 958 break; 959 960 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 961 atomic64_inc(&fnic_stats->io_stats.io_not_found); 962 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 963 break; 964 965 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 966 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); 967 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 968 break; 969 970 case FCPIO_FW_ERR: /* request was terminated due fw error */ 971 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); 972 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 973 break; 974 975 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 976 atomic64_inc(&fnic_stats->misc_stats.mss_invalid); 977 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 978 break; 979 980 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 981 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 982 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 983 default: 984 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 985 break; 986 } 987 988 /* Break link with the SCSI command */ 989 CMD_SP(sc) = NULL; 990 CMD_FLAGS(sc) |= FNIC_IO_DONE; 991 992 spin_unlock_irqrestore(io_lock, flags); 993 994 if (hdr_status != FCPIO_SUCCESS) { 995 atomic64_inc(&fnic_stats->io_stats.io_failures); 996 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 997 fnic_fcpio_status_to_str(hdr_status)); 998 } 999 1000 fnic_release_ioreq_buf(fnic, io_req, sc); 1001 1002 mempool_free(io_req, fnic->io_req_pool); 1003 1004 cmd_trace = ((u64)hdr_status << 56) | 1005 (u64)icmnd_cmpl->scsi_status << 48 | 1006 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 1007 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1008 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 1009 1010 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 1011 sc->device->host->host_no, id, sc, 1012 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1013 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1014 jiffies_to_msecs(jiffies - start_time)), 1015 desc, cmd_trace, 1016 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1017 1018 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1019 fnic->lport->host_stats.fcp_input_requests++; 1020 fnic->fcp_input_bytes += xfer_len; 1021 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1022 fnic->lport->host_stats.fcp_output_requests++; 1023 fnic->fcp_output_bytes += xfer_len; 1024 } else 1025 fnic->lport->host_stats.fcp_control_requests++; 1026 1027 atomic64_dec(&fnic_stats->io_stats.active_ios); 1028 if (atomic64_read(&fnic->io_cmpl_skip)) 1029 atomic64_dec(&fnic->io_cmpl_skip); 1030 else 1031 atomic64_inc(&fnic_stats->io_stats.io_completions); 1032 1033 1034 io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1035 1036 if(io_duration_time <= 10) 1037 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1038 else if(io_duration_time <= 100) 1039 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1040 else if(io_duration_time <= 500) 1041 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1042 else if(io_duration_time <= 5000) 1043 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1044 else if(io_duration_time <= 10000) 1045 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1046 else if(io_duration_time <= 30000) 1047 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1048 else { 1049 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1050 1051 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1052 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1053 } 1054 1055 /* Call SCSI completion function to complete the IO */ 1056 if (sc->scsi_done) 1057 sc->scsi_done(sc); 1058 } 1059 1060 /* fnic_fcpio_itmf_cmpl_handler 1061 * Routine to handle itmf completions 1062 */ 1063 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1064 struct fcpio_fw_req *desc) 1065 { 1066 u8 type; 1067 u8 hdr_status; 1068 struct fcpio_tag tag; 1069 u32 id; 1070 struct scsi_cmnd *sc; 1071 struct fnic_io_req *io_req; 1072 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1073 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1074 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1075 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1076 unsigned long flags; 1077 spinlock_t *io_lock; 1078 unsigned long start_time; 1079 1080 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1081 fcpio_tag_id_dec(&tag, &id); 1082 1083 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1084 shost_printk(KERN_ERR, fnic->lport->host, 1085 "Tag out of range tag %x hdr status = %s\n", 1086 id, fnic_fcpio_status_to_str(hdr_status)); 1087 return; 1088 } 1089 1090 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1091 WARN_ON_ONCE(!sc); 1092 if (!sc) { 1093 atomic64_inc(&fnic_stats->io_stats.sc_null); 1094 shost_printk(KERN_ERR, fnic->lport->host, 1095 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1096 fnic_fcpio_status_to_str(hdr_status), id); 1097 return; 1098 } 1099 io_lock = fnic_io_lock_hash(fnic, sc); 1100 spin_lock_irqsave(io_lock, flags); 1101 io_req = (struct fnic_io_req *)CMD_SP(sc); 1102 WARN_ON_ONCE(!io_req); 1103 if (!io_req) { 1104 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1105 spin_unlock_irqrestore(io_lock, flags); 1106 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1107 shost_printk(KERN_ERR, fnic->lport->host, 1108 "itmf_cmpl io_req is null - " 1109 "hdr status = %s tag = 0x%x sc 0x%p\n", 1110 fnic_fcpio_status_to_str(hdr_status), id, sc); 1111 return; 1112 } 1113 start_time = io_req->start_time; 1114 1115 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1116 /* Abort and terminate completion of device reset req */ 1117 /* REVISIT : Add asserts about various flags */ 1118 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1119 "dev reset abts cmpl recd. id %x status %s\n", 1120 id, fnic_fcpio_status_to_str(hdr_status)); 1121 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1122 CMD_ABTS_STATUS(sc) = hdr_status; 1123 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1124 if (io_req->abts_done) 1125 complete(io_req->abts_done); 1126 spin_unlock_irqrestore(io_lock, flags); 1127 } else if (id & FNIC_TAG_ABORT) { 1128 /* Completion of abort cmd */ 1129 switch (hdr_status) { 1130 case FCPIO_SUCCESS: 1131 break; 1132 case FCPIO_TIMEOUT: 1133 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1134 atomic64_inc(&abts_stats->abort_fw_timeouts); 1135 else 1136 atomic64_inc( 1137 &term_stats->terminate_fw_timeouts); 1138 break; 1139 case FCPIO_ITMF_REJECTED: 1140 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1141 "abort reject recd. id %d\n", 1142 (int)(id & FNIC_TAG_MASK)); 1143 break; 1144 case FCPIO_IO_NOT_FOUND: 1145 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1146 atomic64_inc(&abts_stats->abort_io_not_found); 1147 else 1148 atomic64_inc( 1149 &term_stats->terminate_io_not_found); 1150 break; 1151 default: 1152 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1153 atomic64_inc(&abts_stats->abort_failures); 1154 else 1155 atomic64_inc( 1156 &term_stats->terminate_failures); 1157 break; 1158 } 1159 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 1160 /* This is a late completion. Ignore it */ 1161 spin_unlock_irqrestore(io_lock, flags); 1162 return; 1163 } 1164 1165 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1166 CMD_ABTS_STATUS(sc) = hdr_status; 1167 1168 /* If the status is IO not found consider it as success */ 1169 if (hdr_status == FCPIO_IO_NOT_FOUND) 1170 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; 1171 1172 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1173 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1174 1175 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1176 "abts cmpl recd. id %d status %s\n", 1177 (int)(id & FNIC_TAG_MASK), 1178 fnic_fcpio_status_to_str(hdr_status)); 1179 1180 /* 1181 * If scsi_eh thread is blocked waiting for abts to complete, 1182 * signal completion to it. IO will be cleaned in the thread 1183 * else clean it in this context 1184 */ 1185 if (io_req->abts_done) { 1186 complete(io_req->abts_done); 1187 spin_unlock_irqrestore(io_lock, flags); 1188 } else { 1189 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1190 "abts cmpl, completing IO\n"); 1191 CMD_SP(sc) = NULL; 1192 sc->result = (DID_ERROR << 16); 1193 1194 spin_unlock_irqrestore(io_lock, flags); 1195 1196 fnic_release_ioreq_buf(fnic, io_req, sc); 1197 mempool_free(io_req, fnic->io_req_pool); 1198 if (sc->scsi_done) { 1199 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1200 sc->device->host->host_no, id, 1201 sc, 1202 jiffies_to_msecs(jiffies - start_time), 1203 desc, 1204 (((u64)hdr_status << 40) | 1205 (u64)sc->cmnd[0] << 32 | 1206 (u64)sc->cmnd[2] << 24 | 1207 (u64)sc->cmnd[3] << 16 | 1208 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1209 (((u64)CMD_FLAGS(sc) << 32) | 1210 CMD_STATE(sc))); 1211 sc->scsi_done(sc); 1212 atomic64_dec(&fnic_stats->io_stats.active_ios); 1213 if (atomic64_read(&fnic->io_cmpl_skip)) 1214 atomic64_dec(&fnic->io_cmpl_skip); 1215 else 1216 atomic64_inc(&fnic_stats->io_stats.io_completions); 1217 } 1218 } 1219 1220 } else if (id & FNIC_TAG_DEV_RST) { 1221 /* Completion of device reset */ 1222 CMD_LR_STATUS(sc) = hdr_status; 1223 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1224 spin_unlock_irqrestore(io_lock, flags); 1225 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1226 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1227 sc->device->host->host_no, id, sc, 1228 jiffies_to_msecs(jiffies - start_time), 1229 desc, 0, 1230 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1231 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1232 "Terminate pending " 1233 "dev reset cmpl recd. id %d status %s\n", 1234 (int)(id & FNIC_TAG_MASK), 1235 fnic_fcpio_status_to_str(hdr_status)); 1236 return; 1237 } 1238 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1239 /* Need to wait for terminate completion */ 1240 spin_unlock_irqrestore(io_lock, flags); 1241 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1242 sc->device->host->host_no, id, sc, 1243 jiffies_to_msecs(jiffies - start_time), 1244 desc, 0, 1245 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1246 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1247 "dev reset cmpl recd after time out. " 1248 "id %d status %s\n", 1249 (int)(id & FNIC_TAG_MASK), 1250 fnic_fcpio_status_to_str(hdr_status)); 1251 return; 1252 } 1253 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1254 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1255 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1256 "dev reset cmpl recd. id %d status %s\n", 1257 (int)(id & FNIC_TAG_MASK), 1258 fnic_fcpio_status_to_str(hdr_status)); 1259 if (io_req->dr_done) 1260 complete(io_req->dr_done); 1261 spin_unlock_irqrestore(io_lock, flags); 1262 1263 } else { 1264 shost_printk(KERN_ERR, fnic->lport->host, 1265 "Unexpected itmf io state %s tag %x\n", 1266 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1267 spin_unlock_irqrestore(io_lock, flags); 1268 } 1269 1270 } 1271 1272 /* 1273 * fnic_fcpio_cmpl_handler 1274 * Routine to service the cq for wq_copy 1275 */ 1276 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1277 unsigned int cq_index, 1278 struct fcpio_fw_req *desc) 1279 { 1280 struct fnic *fnic = vnic_dev_priv(vdev); 1281 1282 switch (desc->hdr.type) { 1283 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1284 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1285 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1286 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1287 case FCPIO_RESET_CMPL: /* fw completed reset */ 1288 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1289 break; 1290 default: 1291 break; 1292 } 1293 1294 switch (desc->hdr.type) { 1295 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1296 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1297 break; 1298 1299 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1300 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1301 break; 1302 1303 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1304 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1305 break; 1306 1307 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1308 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1309 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1310 break; 1311 1312 case FCPIO_RESET_CMPL: /* fw completed reset */ 1313 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1314 break; 1315 1316 default: 1317 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1318 "firmware completion type %d\n", 1319 desc->hdr.type); 1320 break; 1321 } 1322 1323 return 0; 1324 } 1325 1326 /* 1327 * fnic_wq_copy_cmpl_handler 1328 * Routine to process wq copy 1329 */ 1330 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1331 { 1332 unsigned int wq_work_done = 0; 1333 unsigned int i, cq_index; 1334 unsigned int cur_work_done; 1335 1336 for (i = 0; i < fnic->wq_copy_count; i++) { 1337 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1338 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1339 fnic_fcpio_cmpl_handler, 1340 copy_work_to_do); 1341 wq_work_done += cur_work_done; 1342 } 1343 return wq_work_done; 1344 } 1345 1346 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) 1347 { 1348 int i; 1349 struct fnic_io_req *io_req; 1350 unsigned long flags = 0; 1351 struct scsi_cmnd *sc; 1352 spinlock_t *io_lock; 1353 unsigned long start_time = 0; 1354 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1355 1356 for (i = 0; i < fnic->fnic_max_tag_id; i++) { 1357 if (i == exclude_id) 1358 continue; 1359 1360 io_lock = fnic_io_lock_tag(fnic, i); 1361 spin_lock_irqsave(io_lock, flags); 1362 sc = scsi_host_find_tag(fnic->lport->host, i); 1363 if (!sc) { 1364 spin_unlock_irqrestore(io_lock, flags); 1365 continue; 1366 } 1367 1368 io_req = (struct fnic_io_req *)CMD_SP(sc); 1369 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1370 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1371 /* 1372 * We will be here only when FW completes reset 1373 * without sending completions for outstanding ios. 1374 */ 1375 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1376 if (io_req && io_req->dr_done) 1377 complete(io_req->dr_done); 1378 else if (io_req && io_req->abts_done) 1379 complete(io_req->abts_done); 1380 spin_unlock_irqrestore(io_lock, flags); 1381 continue; 1382 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1383 spin_unlock_irqrestore(io_lock, flags); 1384 continue; 1385 } 1386 if (!io_req) { 1387 spin_unlock_irqrestore(io_lock, flags); 1388 goto cleanup_scsi_cmd; 1389 } 1390 1391 CMD_SP(sc) = NULL; 1392 1393 spin_unlock_irqrestore(io_lock, flags); 1394 1395 /* 1396 * If there is a scsi_cmnd associated with this io_req, then 1397 * free the corresponding state 1398 */ 1399 start_time = io_req->start_time; 1400 fnic_release_ioreq_buf(fnic, io_req, sc); 1401 mempool_free(io_req, fnic->io_req_pool); 1402 1403 cleanup_scsi_cmd: 1404 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1405 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1406 "%s: sc duration = %lu DID_TRANSPORT_DISRUPTED\n", 1407 __func__, (jiffies - start_time)); 1408 1409 if (atomic64_read(&fnic->io_cmpl_skip)) 1410 atomic64_dec(&fnic->io_cmpl_skip); 1411 else 1412 atomic64_inc(&fnic_stats->io_stats.io_completions); 1413 1414 /* Complete the command to SCSI */ 1415 if (sc->scsi_done) { 1416 FNIC_TRACE(fnic_cleanup_io, 1417 sc->device->host->host_no, i, sc, 1418 jiffies_to_msecs(jiffies - start_time), 1419 0, ((u64)sc->cmnd[0] << 32 | 1420 (u64)sc->cmnd[2] << 24 | 1421 (u64)sc->cmnd[3] << 16 | 1422 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1423 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1424 1425 sc->scsi_done(sc); 1426 } 1427 } 1428 } 1429 1430 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1431 struct fcpio_host_req *desc) 1432 { 1433 u32 id; 1434 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1435 struct fnic_io_req *io_req; 1436 struct scsi_cmnd *sc; 1437 unsigned long flags; 1438 spinlock_t *io_lock; 1439 unsigned long start_time = 0; 1440 1441 /* get the tag reference */ 1442 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1443 id &= FNIC_TAG_MASK; 1444 1445 if (id >= fnic->fnic_max_tag_id) 1446 return; 1447 1448 sc = scsi_host_find_tag(fnic->lport->host, id); 1449 if (!sc) 1450 return; 1451 1452 io_lock = fnic_io_lock_hash(fnic, sc); 1453 spin_lock_irqsave(io_lock, flags); 1454 1455 /* Get the IO context which this desc refers to */ 1456 io_req = (struct fnic_io_req *)CMD_SP(sc); 1457 1458 /* fnic interrupts are turned off by now */ 1459 1460 if (!io_req) { 1461 spin_unlock_irqrestore(io_lock, flags); 1462 goto wq_copy_cleanup_scsi_cmd; 1463 } 1464 1465 CMD_SP(sc) = NULL; 1466 1467 spin_unlock_irqrestore(io_lock, flags); 1468 1469 start_time = io_req->start_time; 1470 fnic_release_ioreq_buf(fnic, io_req, sc); 1471 mempool_free(io_req, fnic->io_req_pool); 1472 1473 wq_copy_cleanup_scsi_cmd: 1474 sc->result = DID_NO_CONNECT << 16; 1475 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1476 " DID_NO_CONNECT\n"); 1477 1478 if (sc->scsi_done) { 1479 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1480 sc->device->host->host_no, id, sc, 1481 jiffies_to_msecs(jiffies - start_time), 1482 0, ((u64)sc->cmnd[0] << 32 | 1483 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1484 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1485 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1486 1487 sc->scsi_done(sc); 1488 } 1489 } 1490 1491 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1492 u32 task_req, u8 *fc_lun, 1493 struct fnic_io_req *io_req) 1494 { 1495 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1496 struct Scsi_Host *host = fnic->lport->host; 1497 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1498 unsigned long flags; 1499 1500 spin_lock_irqsave(host->host_lock, flags); 1501 if (unlikely(fnic_chk_state_flags_locked(fnic, 1502 FNIC_FLAGS_IO_BLOCKED))) { 1503 spin_unlock_irqrestore(host->host_lock, flags); 1504 return 1; 1505 } else 1506 atomic_inc(&fnic->in_flight); 1507 spin_unlock_irqrestore(host->host_lock, flags); 1508 1509 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1510 1511 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1512 free_wq_copy_descs(fnic, wq); 1513 1514 if (!vnic_wq_copy_desc_avail(wq)) { 1515 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1516 atomic_dec(&fnic->in_flight); 1517 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1518 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1519 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1520 return 1; 1521 } 1522 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1523 0, task_req, tag, fc_lun, io_req->port_id, 1524 fnic->config.ra_tov, fnic->config.ed_tov); 1525 1526 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1527 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1528 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1529 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1530 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1531 1532 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1533 atomic_dec(&fnic->in_flight); 1534 1535 return 0; 1536 } 1537 1538 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1539 { 1540 int tag; 1541 int abt_tag; 1542 int term_cnt = 0; 1543 struct fnic_io_req *io_req; 1544 spinlock_t *io_lock; 1545 unsigned long flags; 1546 struct scsi_cmnd *sc; 1547 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1548 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1549 struct scsi_lun fc_lun; 1550 enum fnic_ioreq_state old_ioreq_state; 1551 1552 FNIC_SCSI_DBG(KERN_DEBUG, 1553 fnic->lport->host, 1554 "fnic_rport_exch_reset called portid 0x%06x\n", 1555 port_id); 1556 1557 if (fnic->in_remove) 1558 return; 1559 1560 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1561 abt_tag = tag; 1562 io_lock = fnic_io_lock_tag(fnic, tag); 1563 spin_lock_irqsave(io_lock, flags); 1564 sc = scsi_host_find_tag(fnic->lport->host, tag); 1565 if (!sc) { 1566 spin_unlock_irqrestore(io_lock, flags); 1567 continue; 1568 } 1569 1570 io_req = (struct fnic_io_req *)CMD_SP(sc); 1571 1572 if (!io_req || io_req->port_id != port_id) { 1573 spin_unlock_irqrestore(io_lock, flags); 1574 continue; 1575 } 1576 1577 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1578 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1579 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1580 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1581 sc); 1582 spin_unlock_irqrestore(io_lock, flags); 1583 continue; 1584 } 1585 1586 /* 1587 * Found IO that is still pending with firmware and 1588 * belongs to rport that went away 1589 */ 1590 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1591 spin_unlock_irqrestore(io_lock, flags); 1592 continue; 1593 } 1594 if (io_req->abts_done) { 1595 shost_printk(KERN_ERR, fnic->lport->host, 1596 "fnic_rport_exch_reset: io_req->abts_done is set " 1597 "state is %s\n", 1598 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1599 } 1600 1601 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1602 shost_printk(KERN_ERR, fnic->lport->host, 1603 "rport_exch_reset " 1604 "IO not yet issued %p tag 0x%x flags " 1605 "%x state %d\n", 1606 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1607 } 1608 old_ioreq_state = CMD_STATE(sc); 1609 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1610 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1611 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1612 atomic64_inc(&reset_stats->device_reset_terminates); 1613 abt_tag = (tag | FNIC_TAG_DEV_RST); 1614 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1615 "fnic_rport_exch_reset dev rst sc 0x%p\n", 1616 sc); 1617 } 1618 1619 BUG_ON(io_req->abts_done); 1620 1621 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1622 "fnic_rport_reset_exch: Issuing abts\n"); 1623 1624 spin_unlock_irqrestore(io_lock, flags); 1625 1626 /* Now queue the abort command to firmware */ 1627 int_to_scsilun(sc->device->lun, &fc_lun); 1628 1629 if (fnic_queue_abort_io_req(fnic, abt_tag, 1630 FCPIO_ITMF_ABT_TASK_TERM, 1631 fc_lun.scsi_lun, io_req)) { 1632 /* 1633 * Revert the cmd state back to old state, if 1634 * it hasn't changed in between. This cmd will get 1635 * aborted later by scsi_eh, or cleaned up during 1636 * lun reset 1637 */ 1638 spin_lock_irqsave(io_lock, flags); 1639 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1640 CMD_STATE(sc) = old_ioreq_state; 1641 spin_unlock_irqrestore(io_lock, flags); 1642 } else { 1643 spin_lock_irqsave(io_lock, flags); 1644 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1645 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1646 else 1647 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1648 spin_unlock_irqrestore(io_lock, flags); 1649 atomic64_inc(&term_stats->terminates); 1650 term_cnt++; 1651 } 1652 } 1653 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1654 atomic64_set(&term_stats->max_terminates, term_cnt); 1655 1656 } 1657 1658 void fnic_terminate_rport_io(struct fc_rport *rport) 1659 { 1660 int tag; 1661 int abt_tag; 1662 int term_cnt = 0; 1663 struct fnic_io_req *io_req; 1664 spinlock_t *io_lock; 1665 unsigned long flags; 1666 struct scsi_cmnd *sc; 1667 struct scsi_lun fc_lun; 1668 struct fc_rport_libfc_priv *rdata; 1669 struct fc_lport *lport; 1670 struct fnic *fnic; 1671 struct fc_rport *cmd_rport; 1672 struct reset_stats *reset_stats; 1673 struct terminate_stats *term_stats; 1674 enum fnic_ioreq_state old_ioreq_state; 1675 1676 if (!rport) { 1677 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1678 return; 1679 } 1680 rdata = rport->dd_data; 1681 1682 if (!rdata) { 1683 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1684 return; 1685 } 1686 lport = rdata->local_port; 1687 1688 if (!lport) { 1689 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1690 return; 1691 } 1692 fnic = lport_priv(lport); 1693 FNIC_SCSI_DBG(KERN_DEBUG, 1694 fnic->lport->host, "fnic_terminate_rport_io called" 1695 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1696 rport->port_name, rport->node_name, rport, 1697 rport->port_id); 1698 1699 if (fnic->in_remove) 1700 return; 1701 1702 reset_stats = &fnic->fnic_stats.reset_stats; 1703 term_stats = &fnic->fnic_stats.term_stats; 1704 1705 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1706 abt_tag = tag; 1707 io_lock = fnic_io_lock_tag(fnic, tag); 1708 spin_lock_irqsave(io_lock, flags); 1709 sc = scsi_host_find_tag(fnic->lport->host, tag); 1710 if (!sc) { 1711 spin_unlock_irqrestore(io_lock, flags); 1712 continue; 1713 } 1714 1715 cmd_rport = starget_to_rport(scsi_target(sc->device)); 1716 if (rport != cmd_rport) { 1717 spin_unlock_irqrestore(io_lock, flags); 1718 continue; 1719 } 1720 1721 io_req = (struct fnic_io_req *)CMD_SP(sc); 1722 1723 if (!io_req || rport != cmd_rport) { 1724 spin_unlock_irqrestore(io_lock, flags); 1725 continue; 1726 } 1727 1728 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1729 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1730 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1731 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", 1732 sc); 1733 spin_unlock_irqrestore(io_lock, flags); 1734 continue; 1735 } 1736 /* 1737 * Found IO that is still pending with firmware and 1738 * belongs to rport that went away 1739 */ 1740 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1741 spin_unlock_irqrestore(io_lock, flags); 1742 continue; 1743 } 1744 if (io_req->abts_done) { 1745 shost_printk(KERN_ERR, fnic->lport->host, 1746 "fnic_terminate_rport_io: io_req->abts_done is set " 1747 "state is %s\n", 1748 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1749 } 1750 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1751 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1752 "fnic_terminate_rport_io " 1753 "IO not yet issued %p tag 0x%x flags " 1754 "%x state %d\n", 1755 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1756 } 1757 old_ioreq_state = CMD_STATE(sc); 1758 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1759 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1760 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1761 atomic64_inc(&reset_stats->device_reset_terminates); 1762 abt_tag = (tag | FNIC_TAG_DEV_RST); 1763 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1764 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); 1765 } 1766 1767 BUG_ON(io_req->abts_done); 1768 1769 FNIC_SCSI_DBG(KERN_DEBUG, 1770 fnic->lport->host, 1771 "fnic_terminate_rport_io: Issuing abts\n"); 1772 1773 spin_unlock_irqrestore(io_lock, flags); 1774 1775 /* Now queue the abort command to firmware */ 1776 int_to_scsilun(sc->device->lun, &fc_lun); 1777 1778 if (fnic_queue_abort_io_req(fnic, abt_tag, 1779 FCPIO_ITMF_ABT_TASK_TERM, 1780 fc_lun.scsi_lun, io_req)) { 1781 /* 1782 * Revert the cmd state back to old state, if 1783 * it hasn't changed in between. This cmd will get 1784 * aborted later by scsi_eh, or cleaned up during 1785 * lun reset 1786 */ 1787 spin_lock_irqsave(io_lock, flags); 1788 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1789 CMD_STATE(sc) = old_ioreq_state; 1790 spin_unlock_irqrestore(io_lock, flags); 1791 } else { 1792 spin_lock_irqsave(io_lock, flags); 1793 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1794 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1795 else 1796 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1797 spin_unlock_irqrestore(io_lock, flags); 1798 atomic64_inc(&term_stats->terminates); 1799 term_cnt++; 1800 } 1801 } 1802 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1803 atomic64_set(&term_stats->max_terminates, term_cnt); 1804 1805 } 1806 1807 /* 1808 * This function is exported to SCSI for sending abort cmnds. 1809 * A SCSI IO is represented by a io_req in the driver. 1810 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1811 */ 1812 int fnic_abort_cmd(struct scsi_cmnd *sc) 1813 { 1814 struct fc_lport *lp; 1815 struct fnic *fnic; 1816 struct fnic_io_req *io_req = NULL; 1817 struct fc_rport *rport; 1818 spinlock_t *io_lock; 1819 unsigned long flags; 1820 unsigned long start_time = 0; 1821 int ret = SUCCESS; 1822 u32 task_req = 0; 1823 struct scsi_lun fc_lun; 1824 struct fnic_stats *fnic_stats; 1825 struct abort_stats *abts_stats; 1826 struct terminate_stats *term_stats; 1827 enum fnic_ioreq_state old_ioreq_state; 1828 int tag; 1829 unsigned long abt_issued_time; 1830 DECLARE_COMPLETION_ONSTACK(tm_done); 1831 1832 /* Wait for rport to unblock */ 1833 fc_block_scsi_eh(sc); 1834 1835 /* Get local-port, check ready and link up */ 1836 lp = shost_priv(sc->device->host); 1837 1838 fnic = lport_priv(lp); 1839 fnic_stats = &fnic->fnic_stats; 1840 abts_stats = &fnic->fnic_stats.abts_stats; 1841 term_stats = &fnic->fnic_stats.term_stats; 1842 1843 rport = starget_to_rport(scsi_target(sc->device)); 1844 tag = sc->request->tag; 1845 FNIC_SCSI_DBG(KERN_DEBUG, 1846 fnic->lport->host, 1847 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1848 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1849 1850 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1851 1852 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1853 ret = FAILED; 1854 goto fnic_abort_cmd_end; 1855 } 1856 1857 /* 1858 * Avoid a race between SCSI issuing the abort and the device 1859 * completing the command. 1860 * 1861 * If the command is already completed by the fw cmpl code, 1862 * we just return SUCCESS from here. This means that the abort 1863 * succeeded. In the SCSI ML, since the timeout for command has 1864 * happened, the completion wont actually complete the command 1865 * and it will be considered as an aborted command 1866 * 1867 * The CMD_SP will not be cleared except while holding io_req_lock. 1868 */ 1869 io_lock = fnic_io_lock_hash(fnic, sc); 1870 spin_lock_irqsave(io_lock, flags); 1871 io_req = (struct fnic_io_req *)CMD_SP(sc); 1872 if (!io_req) { 1873 spin_unlock_irqrestore(io_lock, flags); 1874 goto fnic_abort_cmd_end; 1875 } 1876 1877 io_req->abts_done = &tm_done; 1878 1879 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1880 spin_unlock_irqrestore(io_lock, flags); 1881 goto wait_pending; 1882 } 1883 1884 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1885 if (abt_issued_time <= 6000) 1886 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1887 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1888 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1889 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1890 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1891 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1892 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1893 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1894 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1895 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1896 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1897 else 1898 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1899 1900 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1901 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1902 /* 1903 * Command is still pending, need to abort it 1904 * If the firmware completes the command after this point, 1905 * the completion wont be done till mid-layer, since abort 1906 * has already started. 1907 */ 1908 old_ioreq_state = CMD_STATE(sc); 1909 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1910 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1911 1912 spin_unlock_irqrestore(io_lock, flags); 1913 1914 /* 1915 * Check readiness of the remote port. If the path to remote 1916 * port is up, then send abts to the remote port to terminate 1917 * the IO. Else, just locally terminate the IO in the firmware 1918 */ 1919 if (fc_remote_port_chkready(rport) == 0) 1920 task_req = FCPIO_ITMF_ABT_TASK; 1921 else { 1922 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1923 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1924 } 1925 1926 /* Now queue the abort command to firmware */ 1927 int_to_scsilun(sc->device->lun, &fc_lun); 1928 1929 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1930 fc_lun.scsi_lun, io_req)) { 1931 spin_lock_irqsave(io_lock, flags); 1932 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1933 CMD_STATE(sc) = old_ioreq_state; 1934 io_req = (struct fnic_io_req *)CMD_SP(sc); 1935 if (io_req) 1936 io_req->abts_done = NULL; 1937 spin_unlock_irqrestore(io_lock, flags); 1938 ret = FAILED; 1939 goto fnic_abort_cmd_end; 1940 } 1941 if (task_req == FCPIO_ITMF_ABT_TASK) { 1942 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1943 atomic64_inc(&fnic_stats->abts_stats.aborts); 1944 } else { 1945 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1946 atomic64_inc(&fnic_stats->term_stats.terminates); 1947 } 1948 1949 /* 1950 * We queued an abort IO, wait for its completion. 1951 * Once the firmware completes the abort command, it will 1952 * wake up this thread. 1953 */ 1954 wait_pending: 1955 wait_for_completion_timeout(&tm_done, 1956 msecs_to_jiffies 1957 (2 * fnic->config.ra_tov + 1958 fnic->config.ed_tov)); 1959 1960 /* Check the abort status */ 1961 spin_lock_irqsave(io_lock, flags); 1962 1963 io_req = (struct fnic_io_req *)CMD_SP(sc); 1964 if (!io_req) { 1965 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1966 spin_unlock_irqrestore(io_lock, flags); 1967 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1968 ret = FAILED; 1969 goto fnic_abort_cmd_end; 1970 } 1971 io_req->abts_done = NULL; 1972 1973 /* fw did not complete abort, timed out */ 1974 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1975 spin_unlock_irqrestore(io_lock, flags); 1976 if (task_req == FCPIO_ITMF_ABT_TASK) { 1977 atomic64_inc(&abts_stats->abort_drv_timeouts); 1978 } else { 1979 atomic64_inc(&term_stats->terminate_drv_timeouts); 1980 } 1981 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 1982 ret = FAILED; 1983 goto fnic_abort_cmd_end; 1984 } 1985 1986 /* IO out of order */ 1987 1988 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1989 spin_unlock_irqrestore(io_lock, flags); 1990 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1991 "Issuing Host reset due to out of order IO\n"); 1992 1993 if (fnic_host_reset(sc) == FAILED) { 1994 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1995 "fnic_host_reset failed.\n"); 1996 } 1997 ret = FAILED; 1998 goto fnic_abort_cmd_end; 1999 } 2000 2001 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2002 2003 start_time = io_req->start_time; 2004 /* 2005 * firmware completed the abort, check the status, 2006 * free the io_req if successful. If abort fails, 2007 * Device reset will clean the I/O. 2008 */ 2009 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) 2010 CMD_SP(sc) = NULL; 2011 else { 2012 ret = FAILED; 2013 spin_unlock_irqrestore(io_lock, flags); 2014 goto fnic_abort_cmd_end; 2015 } 2016 2017 spin_unlock_irqrestore(io_lock, flags); 2018 2019 fnic_release_ioreq_buf(fnic, io_req, sc); 2020 mempool_free(io_req, fnic->io_req_pool); 2021 2022 if (sc->scsi_done) { 2023 /* Call SCSI completion function to complete the IO */ 2024 sc->result = (DID_ABORT << 16); 2025 sc->scsi_done(sc); 2026 atomic64_dec(&fnic_stats->io_stats.active_ios); 2027 if (atomic64_read(&fnic->io_cmpl_skip)) 2028 atomic64_dec(&fnic->io_cmpl_skip); 2029 else 2030 atomic64_inc(&fnic_stats->io_stats.io_completions); 2031 } 2032 2033 fnic_abort_cmd_end: 2034 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 2035 sc->request->tag, sc, 2036 jiffies_to_msecs(jiffies - start_time), 2037 0, ((u64)sc->cmnd[0] << 32 | 2038 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2039 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2040 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2041 2042 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2043 "Returning from abort cmd type %x %s\n", task_req, 2044 (ret == SUCCESS) ? 2045 "SUCCESS" : "FAILED"); 2046 return ret; 2047 } 2048 2049 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 2050 struct scsi_cmnd *sc, 2051 struct fnic_io_req *io_req) 2052 { 2053 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 2054 struct Scsi_Host *host = fnic->lport->host; 2055 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 2056 struct scsi_lun fc_lun; 2057 int ret = 0; 2058 unsigned long intr_flags; 2059 2060 spin_lock_irqsave(host->host_lock, intr_flags); 2061 if (unlikely(fnic_chk_state_flags_locked(fnic, 2062 FNIC_FLAGS_IO_BLOCKED))) { 2063 spin_unlock_irqrestore(host->host_lock, intr_flags); 2064 return FAILED; 2065 } else 2066 atomic_inc(&fnic->in_flight); 2067 spin_unlock_irqrestore(host->host_lock, intr_flags); 2068 2069 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 2070 2071 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 2072 free_wq_copy_descs(fnic, wq); 2073 2074 if (!vnic_wq_copy_desc_avail(wq)) { 2075 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2076 "queue_dr_io_req failure - no descriptors\n"); 2077 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 2078 ret = -EAGAIN; 2079 goto lr_io_req_end; 2080 } 2081 2082 /* fill in the lun info */ 2083 int_to_scsilun(sc->device->lun, &fc_lun); 2084 2085 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 2086 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 2087 fc_lun.scsi_lun, io_req->port_id, 2088 fnic->config.ra_tov, fnic->config.ed_tov); 2089 2090 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 2091 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 2092 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 2093 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 2094 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 2095 2096 lr_io_req_end: 2097 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 2098 atomic_dec(&fnic->in_flight); 2099 2100 return ret; 2101 } 2102 2103 /* 2104 * Clean up any pending aborts on the lun 2105 * For each outstanding IO on this lun, whose abort is not completed by fw, 2106 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2107 * successfully aborted, 1 otherwise 2108 */ 2109 static int fnic_clean_pending_aborts(struct fnic *fnic, 2110 struct scsi_cmnd *lr_sc, 2111 bool new_sc) 2112 2113 { 2114 int tag, abt_tag; 2115 struct fnic_io_req *io_req; 2116 spinlock_t *io_lock; 2117 unsigned long flags; 2118 int ret = 0; 2119 struct scsi_cmnd *sc; 2120 struct scsi_lun fc_lun; 2121 struct scsi_device *lun_dev = lr_sc->device; 2122 DECLARE_COMPLETION_ONSTACK(tm_done); 2123 enum fnic_ioreq_state old_ioreq_state; 2124 2125 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2126 io_lock = fnic_io_lock_tag(fnic, tag); 2127 spin_lock_irqsave(io_lock, flags); 2128 sc = scsi_host_find_tag(fnic->lport->host, tag); 2129 /* 2130 * ignore this lun reset cmd if issued using new SC 2131 * or cmds that do not belong to this lun 2132 */ 2133 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) { 2134 spin_unlock_irqrestore(io_lock, flags); 2135 continue; 2136 } 2137 2138 io_req = (struct fnic_io_req *)CMD_SP(sc); 2139 2140 if (!io_req || sc->device != lun_dev) { 2141 spin_unlock_irqrestore(io_lock, flags); 2142 continue; 2143 } 2144 2145 /* 2146 * Found IO that is still pending with firmware and 2147 * belongs to the LUN that we are resetting 2148 */ 2149 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2150 "Found IO in %s on lun\n", 2151 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2152 2153 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2154 spin_unlock_irqrestore(io_lock, flags); 2155 continue; 2156 } 2157 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 2158 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 2159 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2160 "%s dev rst not pending sc 0x%p\n", __func__, 2161 sc); 2162 spin_unlock_irqrestore(io_lock, flags); 2163 continue; 2164 } 2165 2166 if (io_req->abts_done) 2167 shost_printk(KERN_ERR, fnic->lport->host, 2168 "%s: io_req->abts_done is set state is %s\n", 2169 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 2170 old_ioreq_state = CMD_STATE(sc); 2171 /* 2172 * Any pending IO issued prior to reset is expected to be 2173 * in abts pending state, if not we need to set 2174 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2175 * When IO is completed, the IO will be handed over and 2176 * handled in this function. 2177 */ 2178 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2179 2180 BUG_ON(io_req->abts_done); 2181 2182 abt_tag = tag; 2183 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 2184 abt_tag |= FNIC_TAG_DEV_RST; 2185 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2186 "%s: dev rst sc 0x%p\n", __func__, sc); 2187 } 2188 2189 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 2190 io_req->abts_done = &tm_done; 2191 spin_unlock_irqrestore(io_lock, flags); 2192 2193 /* Now queue the abort command to firmware */ 2194 int_to_scsilun(sc->device->lun, &fc_lun); 2195 2196 if (fnic_queue_abort_io_req(fnic, abt_tag, 2197 FCPIO_ITMF_ABT_TASK_TERM, 2198 fc_lun.scsi_lun, io_req)) { 2199 spin_lock_irqsave(io_lock, flags); 2200 io_req = (struct fnic_io_req *)CMD_SP(sc); 2201 if (io_req) 2202 io_req->abts_done = NULL; 2203 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2204 CMD_STATE(sc) = old_ioreq_state; 2205 spin_unlock_irqrestore(io_lock, flags); 2206 ret = 1; 2207 goto clean_pending_aborts_end; 2208 } else { 2209 spin_lock_irqsave(io_lock, flags); 2210 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 2211 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2212 spin_unlock_irqrestore(io_lock, flags); 2213 } 2214 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 2215 2216 wait_for_completion_timeout(&tm_done, 2217 msecs_to_jiffies 2218 (fnic->config.ed_tov)); 2219 2220 /* Recheck cmd state to check if it is now aborted */ 2221 spin_lock_irqsave(io_lock, flags); 2222 io_req = (struct fnic_io_req *)CMD_SP(sc); 2223 if (!io_req) { 2224 spin_unlock_irqrestore(io_lock, flags); 2225 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 2226 continue; 2227 } 2228 2229 io_req->abts_done = NULL; 2230 2231 /* if abort is still pending with fw, fail */ 2232 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 2233 spin_unlock_irqrestore(io_lock, flags); 2234 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 2235 ret = 1; 2236 goto clean_pending_aborts_end; 2237 } 2238 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2239 2240 /* original sc used for lr is handled by dev reset code */ 2241 if (sc != lr_sc) 2242 CMD_SP(sc) = NULL; 2243 spin_unlock_irqrestore(io_lock, flags); 2244 2245 /* original sc used for lr is handled by dev reset code */ 2246 if (sc != lr_sc) { 2247 fnic_release_ioreq_buf(fnic, io_req, sc); 2248 mempool_free(io_req, fnic->io_req_pool); 2249 } 2250 2251 /* 2252 * Any IO is returned during reset, it needs to call scsi_done 2253 * to return the scsi_cmnd to upper layer. 2254 */ 2255 if (sc->scsi_done) { 2256 /* Set result to let upper SCSI layer retry */ 2257 sc->result = DID_RESET << 16; 2258 sc->scsi_done(sc); 2259 } 2260 } 2261 2262 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2263 2264 /* walk again to check, if IOs are still pending in fw */ 2265 if (fnic_is_abts_pending(fnic, lr_sc)) 2266 ret = FAILED; 2267 2268 clean_pending_aborts_end: 2269 return ret; 2270 } 2271 2272 /** 2273 * fnic_scsi_host_start_tag 2274 * Allocates tagid from host's tag list 2275 **/ 2276 static inline int 2277 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2278 { 2279 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 2280 int tag, ret = SCSI_NO_TAG; 2281 2282 BUG_ON(!bqt); 2283 if (!bqt) { 2284 pr_err("Tags are not supported\n"); 2285 goto end; 2286 } 2287 2288 do { 2289 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1); 2290 if (tag >= bqt->max_depth) { 2291 pr_err("Tag allocation failure\n"); 2292 goto end; 2293 } 2294 } while (test_and_set_bit(tag, bqt->tag_map)); 2295 2296 bqt->tag_index[tag] = sc->request; 2297 sc->request->tag = tag; 2298 sc->tag = tag; 2299 if (!sc->request->special) 2300 sc->request->special = sc; 2301 2302 ret = tag; 2303 2304 end: 2305 return ret; 2306 } 2307 2308 /** 2309 * fnic_scsi_host_end_tag 2310 * frees tag allocated by fnic_scsi_host_start_tag. 2311 **/ 2312 static inline void 2313 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2314 { 2315 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 2316 int tag = sc->request->tag; 2317 2318 if (tag == SCSI_NO_TAG) 2319 return; 2320 2321 BUG_ON(!bqt || !bqt->tag_index[tag]); 2322 if (!bqt) 2323 return; 2324 2325 bqt->tag_index[tag] = NULL; 2326 clear_bit(tag, bqt->tag_map); 2327 2328 return; 2329 } 2330 2331 /* 2332 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2333 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2334 * on the LUN. 2335 */ 2336 int fnic_device_reset(struct scsi_cmnd *sc) 2337 { 2338 struct fc_lport *lp; 2339 struct fnic *fnic; 2340 struct fnic_io_req *io_req = NULL; 2341 struct fc_rport *rport; 2342 int status; 2343 int ret = FAILED; 2344 spinlock_t *io_lock; 2345 unsigned long flags; 2346 unsigned long start_time = 0; 2347 struct scsi_lun fc_lun; 2348 struct fnic_stats *fnic_stats; 2349 struct reset_stats *reset_stats; 2350 int tag = 0; 2351 DECLARE_COMPLETION_ONSTACK(tm_done); 2352 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2353 bool new_sc = 0; 2354 2355 /* Wait for rport to unblock */ 2356 fc_block_scsi_eh(sc); 2357 2358 /* Get local-port, check ready and link up */ 2359 lp = shost_priv(sc->device->host); 2360 2361 fnic = lport_priv(lp); 2362 fnic_stats = &fnic->fnic_stats; 2363 reset_stats = &fnic->fnic_stats.reset_stats; 2364 2365 atomic64_inc(&reset_stats->device_resets); 2366 2367 rport = starget_to_rport(scsi_target(sc->device)); 2368 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2369 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2370 rport->port_id, sc->device->lun, sc); 2371 2372 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2373 goto fnic_device_reset_end; 2374 2375 /* Check if remote port up */ 2376 if (fc_remote_port_chkready(rport)) { 2377 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2378 goto fnic_device_reset_end; 2379 } 2380 2381 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2382 /* Allocate tag if not present */ 2383 2384 tag = sc->request->tag; 2385 if (unlikely(tag < 0)) { 2386 /* 2387 * XXX(hch): current the midlayer fakes up a struct 2388 * request for the explicit reset ioctls, and those 2389 * don't have a tag allocated to them. The below 2390 * code pokes into midlayer structures to paper over 2391 * this design issue, but that won't work for blk-mq. 2392 * 2393 * Either someone who can actually test the hardware 2394 * will have to come up with a similar hack for the 2395 * blk-mq case, or we'll have to bite the bullet and 2396 * fix the way the EH ioctls work for real, but until 2397 * that happens we fail these explicit requests here. 2398 */ 2399 2400 tag = fnic_scsi_host_start_tag(fnic, sc); 2401 if (unlikely(tag == SCSI_NO_TAG)) 2402 goto fnic_device_reset_end; 2403 tag_gen_flag = 1; 2404 new_sc = 1; 2405 } 2406 io_lock = fnic_io_lock_hash(fnic, sc); 2407 spin_lock_irqsave(io_lock, flags); 2408 io_req = (struct fnic_io_req *)CMD_SP(sc); 2409 2410 /* 2411 * If there is a io_req attached to this command, then use it, 2412 * else allocate a new one. 2413 */ 2414 if (!io_req) { 2415 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2416 if (!io_req) { 2417 spin_unlock_irqrestore(io_lock, flags); 2418 goto fnic_device_reset_end; 2419 } 2420 memset(io_req, 0, sizeof(*io_req)); 2421 io_req->port_id = rport->port_id; 2422 CMD_SP(sc) = (char *)io_req; 2423 } 2424 io_req->dr_done = &tm_done; 2425 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2426 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2427 spin_unlock_irqrestore(io_lock, flags); 2428 2429 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2430 2431 /* 2432 * issue the device reset, if enqueue failed, clean up the ioreq 2433 * and break assoc with scsi cmd 2434 */ 2435 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2436 spin_lock_irqsave(io_lock, flags); 2437 io_req = (struct fnic_io_req *)CMD_SP(sc); 2438 if (io_req) 2439 io_req->dr_done = NULL; 2440 goto fnic_device_reset_clean; 2441 } 2442 spin_lock_irqsave(io_lock, flags); 2443 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2444 spin_unlock_irqrestore(io_lock, flags); 2445 2446 /* 2447 * Wait on the local completion for LUN reset. The io_req may be 2448 * freed while we wait since we hold no lock. 2449 */ 2450 wait_for_completion_timeout(&tm_done, 2451 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2452 2453 spin_lock_irqsave(io_lock, flags); 2454 io_req = (struct fnic_io_req *)CMD_SP(sc); 2455 if (!io_req) { 2456 spin_unlock_irqrestore(io_lock, flags); 2457 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2458 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2459 goto fnic_device_reset_end; 2460 } 2461 io_req->dr_done = NULL; 2462 2463 status = CMD_LR_STATUS(sc); 2464 2465 /* 2466 * If lun reset not completed, bail out with failed. io_req 2467 * gets cleaned up during higher levels of EH 2468 */ 2469 if (status == FCPIO_INVALID_CODE) { 2470 atomic64_inc(&reset_stats->device_reset_timeouts); 2471 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2472 "Device reset timed out\n"); 2473 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2474 spin_unlock_irqrestore(io_lock, flags); 2475 int_to_scsilun(sc->device->lun, &fc_lun); 2476 /* 2477 * Issue abort and terminate on device reset request. 2478 * If q'ing of terminate fails, retry it after a delay. 2479 */ 2480 while (1) { 2481 spin_lock_irqsave(io_lock, flags); 2482 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2483 spin_unlock_irqrestore(io_lock, flags); 2484 break; 2485 } 2486 spin_unlock_irqrestore(io_lock, flags); 2487 if (fnic_queue_abort_io_req(fnic, 2488 tag | FNIC_TAG_DEV_RST, 2489 FCPIO_ITMF_ABT_TASK_TERM, 2490 fc_lun.scsi_lun, io_req)) { 2491 wait_for_completion_timeout(&tm_done, 2492 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2493 } else { 2494 spin_lock_irqsave(io_lock, flags); 2495 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2496 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2497 io_req->abts_done = &tm_done; 2498 spin_unlock_irqrestore(io_lock, flags); 2499 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2500 "Abort and terminate issued on Device reset " 2501 "tag 0x%x sc 0x%p\n", tag, sc); 2502 break; 2503 } 2504 } 2505 while (1) { 2506 spin_lock_irqsave(io_lock, flags); 2507 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2508 spin_unlock_irqrestore(io_lock, flags); 2509 wait_for_completion_timeout(&tm_done, 2510 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2511 break; 2512 } else { 2513 io_req = (struct fnic_io_req *)CMD_SP(sc); 2514 io_req->abts_done = NULL; 2515 goto fnic_device_reset_clean; 2516 } 2517 } 2518 } else { 2519 spin_unlock_irqrestore(io_lock, flags); 2520 } 2521 2522 /* Completed, but not successful, clean up the io_req, return fail */ 2523 if (status != FCPIO_SUCCESS) { 2524 spin_lock_irqsave(io_lock, flags); 2525 FNIC_SCSI_DBG(KERN_DEBUG, 2526 fnic->lport->host, 2527 "Device reset completed - failed\n"); 2528 io_req = (struct fnic_io_req *)CMD_SP(sc); 2529 goto fnic_device_reset_clean; 2530 } 2531 2532 /* 2533 * Clean up any aborts on this lun that have still not 2534 * completed. If any of these fail, then LUN reset fails. 2535 * clean_pending_aborts cleans all cmds on this lun except 2536 * the lun reset cmd. If all cmds get cleaned, the lun reset 2537 * succeeds 2538 */ 2539 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2540 spin_lock_irqsave(io_lock, flags); 2541 io_req = (struct fnic_io_req *)CMD_SP(sc); 2542 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2543 "Device reset failed" 2544 " since could not abort all IOs\n"); 2545 goto fnic_device_reset_clean; 2546 } 2547 2548 /* Clean lun reset command */ 2549 spin_lock_irqsave(io_lock, flags); 2550 io_req = (struct fnic_io_req *)CMD_SP(sc); 2551 if (io_req) 2552 /* Completed, and successful */ 2553 ret = SUCCESS; 2554 2555 fnic_device_reset_clean: 2556 if (io_req) 2557 CMD_SP(sc) = NULL; 2558 2559 spin_unlock_irqrestore(io_lock, flags); 2560 2561 if (io_req) { 2562 start_time = io_req->start_time; 2563 fnic_release_ioreq_buf(fnic, io_req, sc); 2564 mempool_free(io_req, fnic->io_req_pool); 2565 } 2566 2567 fnic_device_reset_end: 2568 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2569 sc->request->tag, sc, 2570 jiffies_to_msecs(jiffies - start_time), 2571 0, ((u64)sc->cmnd[0] << 32 | 2572 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2573 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2574 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2575 2576 /* free tag if it is allocated */ 2577 if (unlikely(tag_gen_flag)) 2578 fnic_scsi_host_end_tag(fnic, sc); 2579 2580 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2581 "Returning from device reset %s\n", 2582 (ret == SUCCESS) ? 2583 "SUCCESS" : "FAILED"); 2584 2585 if (ret == FAILED) 2586 atomic64_inc(&reset_stats->device_reset_failures); 2587 2588 return ret; 2589 } 2590 2591 /* Clean up all IOs, clean up libFC local port */ 2592 int fnic_reset(struct Scsi_Host *shost) 2593 { 2594 struct fc_lport *lp; 2595 struct fnic *fnic; 2596 int ret = 0; 2597 struct reset_stats *reset_stats; 2598 2599 lp = shost_priv(shost); 2600 fnic = lport_priv(lp); 2601 reset_stats = &fnic->fnic_stats.reset_stats; 2602 2603 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2604 "fnic_reset called\n"); 2605 2606 atomic64_inc(&reset_stats->fnic_resets); 2607 2608 /* 2609 * Reset local port, this will clean up libFC exchanges, 2610 * reset remote port sessions, and if link is up, begin flogi 2611 */ 2612 ret = fc_lport_reset(lp); 2613 2614 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2615 "Returning from fnic reset %s\n", 2616 (ret == 0) ? 2617 "SUCCESS" : "FAILED"); 2618 2619 if (ret == 0) 2620 atomic64_inc(&reset_stats->fnic_reset_completions); 2621 else 2622 atomic64_inc(&reset_stats->fnic_reset_failures); 2623 2624 return ret; 2625 } 2626 2627 /* 2628 * SCSI Error handling calls driver's eh_host_reset if all prior 2629 * error handling levels return FAILED. If host reset completes 2630 * successfully, and if link is up, then Fabric login begins. 2631 * 2632 * Host Reset is the highest level of error recovery. If this fails, then 2633 * host is offlined by SCSI. 2634 * 2635 */ 2636 int fnic_host_reset(struct scsi_cmnd *sc) 2637 { 2638 int ret; 2639 unsigned long wait_host_tmo; 2640 struct Scsi_Host *shost = sc->device->host; 2641 struct fc_lport *lp = shost_priv(shost); 2642 struct fnic *fnic = lport_priv(lp); 2643 unsigned long flags; 2644 2645 spin_lock_irqsave(&fnic->fnic_lock, flags); 2646 if (fnic->internal_reset_inprogress == 0) { 2647 fnic->internal_reset_inprogress = 1; 2648 } else { 2649 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2650 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2651 "host reset in progress skipping another host reset\n"); 2652 return SUCCESS; 2653 } 2654 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2655 2656 /* 2657 * If fnic_reset is successful, wait for fabric login to complete 2658 * scsi-ml tries to send a TUR to every device if host reset is 2659 * successful, so before returning to scsi, fabric should be up 2660 */ 2661 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2662 if (ret == SUCCESS) { 2663 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2664 ret = FAILED; 2665 while (time_before(jiffies, wait_host_tmo)) { 2666 if ((lp->state == LPORT_ST_READY) && 2667 (lp->link_up)) { 2668 ret = SUCCESS; 2669 break; 2670 } 2671 ssleep(1); 2672 } 2673 } 2674 2675 spin_lock_irqsave(&fnic->fnic_lock, flags); 2676 fnic->internal_reset_inprogress = 0; 2677 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2678 return ret; 2679 } 2680 2681 /* 2682 * This fxn is called from libFC when host is removed 2683 */ 2684 void fnic_scsi_abort_io(struct fc_lport *lp) 2685 { 2686 int err = 0; 2687 unsigned long flags; 2688 enum fnic_state old_state; 2689 struct fnic *fnic = lport_priv(lp); 2690 DECLARE_COMPLETION_ONSTACK(remove_wait); 2691 2692 /* Issue firmware reset for fnic, wait for reset to complete */ 2693 retry_fw_reset: 2694 spin_lock_irqsave(&fnic->fnic_lock, flags); 2695 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2696 /* fw reset is in progress, poll for its completion */ 2697 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2698 schedule_timeout(msecs_to_jiffies(100)); 2699 goto retry_fw_reset; 2700 } 2701 2702 fnic->remove_wait = &remove_wait; 2703 old_state = fnic->state; 2704 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2705 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2706 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2707 2708 err = fnic_fw_reset_handler(fnic); 2709 if (err) { 2710 spin_lock_irqsave(&fnic->fnic_lock, flags); 2711 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2712 fnic->state = old_state; 2713 fnic->remove_wait = NULL; 2714 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2715 return; 2716 } 2717 2718 /* Wait for firmware reset to complete */ 2719 wait_for_completion_timeout(&remove_wait, 2720 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2721 2722 spin_lock_irqsave(&fnic->fnic_lock, flags); 2723 fnic->remove_wait = NULL; 2724 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2725 "fnic_scsi_abort_io %s\n", 2726 (fnic->state == FNIC_IN_ETH_MODE) ? 2727 "SUCCESS" : "FAILED"); 2728 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2729 2730 } 2731 2732 /* 2733 * This fxn called from libFC to clean up driver IO state on link down 2734 */ 2735 void fnic_scsi_cleanup(struct fc_lport *lp) 2736 { 2737 unsigned long flags; 2738 enum fnic_state old_state; 2739 struct fnic *fnic = lport_priv(lp); 2740 2741 /* issue fw reset */ 2742 retry_fw_reset: 2743 spin_lock_irqsave(&fnic->fnic_lock, flags); 2744 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2745 /* fw reset is in progress, poll for its completion */ 2746 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2747 schedule_timeout(msecs_to_jiffies(100)); 2748 goto retry_fw_reset; 2749 } 2750 old_state = fnic->state; 2751 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2752 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2753 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2754 2755 if (fnic_fw_reset_handler(fnic)) { 2756 spin_lock_irqsave(&fnic->fnic_lock, flags); 2757 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2758 fnic->state = old_state; 2759 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2760 } 2761 2762 } 2763 2764 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2765 { 2766 } 2767 2768 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2769 { 2770 struct fnic *fnic = lport_priv(lp); 2771 2772 /* Non-zero sid, nothing to do */ 2773 if (sid) 2774 goto call_fc_exch_mgr_reset; 2775 2776 if (did) { 2777 fnic_rport_exch_reset(fnic, did); 2778 goto call_fc_exch_mgr_reset; 2779 } 2780 2781 /* 2782 * sid = 0, did = 0 2783 * link down or device being removed 2784 */ 2785 if (!fnic->in_remove) 2786 fnic_scsi_cleanup(lp); 2787 else 2788 fnic_scsi_abort_io(lp); 2789 2790 /* call libFC exch mgr reset to reset its exchanges */ 2791 call_fc_exch_mgr_reset: 2792 fc_exch_mgr_reset(lp, sid, did); 2793 2794 } 2795 2796 /* 2797 * fnic_is_abts_pending() is a helper function that 2798 * walks through tag map to check if there is any IOs pending,if there is one, 2799 * then it returns 1 (true), otherwise 0 (false) 2800 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2801 * otherwise, it checks for all IOs. 2802 */ 2803 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2804 { 2805 int tag; 2806 struct fnic_io_req *io_req; 2807 spinlock_t *io_lock; 2808 unsigned long flags; 2809 int ret = 0; 2810 struct scsi_cmnd *sc; 2811 struct scsi_device *lun_dev = NULL; 2812 2813 if (lr_sc) 2814 lun_dev = lr_sc->device; 2815 2816 /* walk again to check, if IOs are still pending in fw */ 2817 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2818 sc = scsi_host_find_tag(fnic->lport->host, tag); 2819 /* 2820 * ignore this lun reset cmd or cmds that do not belong to 2821 * this lun 2822 */ 2823 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) 2824 continue; 2825 2826 io_lock = fnic_io_lock_hash(fnic, sc); 2827 spin_lock_irqsave(io_lock, flags); 2828 2829 io_req = (struct fnic_io_req *)CMD_SP(sc); 2830 2831 if (!io_req || sc->device != lun_dev) { 2832 spin_unlock_irqrestore(io_lock, flags); 2833 continue; 2834 } 2835 2836 /* 2837 * Found IO that is still pending with firmware and 2838 * belongs to the LUN that we are resetting 2839 */ 2840 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2841 "Found IO in %s on lun\n", 2842 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2843 2844 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2845 ret = 1; 2846 spin_unlock_irqrestore(io_lock, flags); 2847 } 2848 2849 return ret; 2850 } 2851