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