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