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) - 1028 jiffies_to_msecs(start_time); 1029 1030 if(io_duration_time <= 10) 1031 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1032 else if(io_duration_time <= 100) 1033 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1034 else if(io_duration_time <= 500) 1035 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1036 else if(io_duration_time <= 5000) 1037 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1038 else if(io_duration_time <= 10000) 1039 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1040 else if(io_duration_time <= 30000) 1041 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1042 else { 1043 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1044 1045 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1046 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1047 } 1048 1049 /* Call SCSI completion function to complete the IO */ 1050 if (sc->scsi_done) 1051 sc->scsi_done(sc); 1052 } 1053 1054 /* fnic_fcpio_itmf_cmpl_handler 1055 * Routine to handle itmf completions 1056 */ 1057 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1058 struct fcpio_fw_req *desc) 1059 { 1060 u8 type; 1061 u8 hdr_status; 1062 struct fcpio_tag tag; 1063 u32 id; 1064 struct scsi_cmnd *sc; 1065 struct fnic_io_req *io_req; 1066 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1067 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1068 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1069 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1070 unsigned long flags; 1071 spinlock_t *io_lock; 1072 unsigned long start_time; 1073 1074 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1075 fcpio_tag_id_dec(&tag, &id); 1076 1077 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1078 shost_printk(KERN_ERR, fnic->lport->host, 1079 "Tag out of range tag %x hdr status = %s\n", 1080 id, fnic_fcpio_status_to_str(hdr_status)); 1081 return; 1082 } 1083 1084 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1085 WARN_ON_ONCE(!sc); 1086 if (!sc) { 1087 atomic64_inc(&fnic_stats->io_stats.sc_null); 1088 shost_printk(KERN_ERR, fnic->lport->host, 1089 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1090 fnic_fcpio_status_to_str(hdr_status), id); 1091 return; 1092 } 1093 io_lock = fnic_io_lock_hash(fnic, sc); 1094 spin_lock_irqsave(io_lock, flags); 1095 io_req = (struct fnic_io_req *)CMD_SP(sc); 1096 WARN_ON_ONCE(!io_req); 1097 if (!io_req) { 1098 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1099 spin_unlock_irqrestore(io_lock, flags); 1100 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1101 shost_printk(KERN_ERR, fnic->lport->host, 1102 "itmf_cmpl io_req is null - " 1103 "hdr status = %s tag = 0x%x sc 0x%p\n", 1104 fnic_fcpio_status_to_str(hdr_status), id, sc); 1105 return; 1106 } 1107 start_time = io_req->start_time; 1108 1109 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1110 /* Abort and terminate completion of device reset req */ 1111 /* REVISIT : Add asserts about various flags */ 1112 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1113 "dev reset abts cmpl recd. id %x status %s\n", 1114 id, fnic_fcpio_status_to_str(hdr_status)); 1115 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1116 CMD_ABTS_STATUS(sc) = hdr_status; 1117 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1118 if (io_req->abts_done) 1119 complete(io_req->abts_done); 1120 spin_unlock_irqrestore(io_lock, flags); 1121 } else if (id & FNIC_TAG_ABORT) { 1122 /* Completion of abort cmd */ 1123 switch (hdr_status) { 1124 case FCPIO_SUCCESS: 1125 break; 1126 case FCPIO_TIMEOUT: 1127 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1128 atomic64_inc(&abts_stats->abort_fw_timeouts); 1129 else 1130 atomic64_inc( 1131 &term_stats->terminate_fw_timeouts); 1132 break; 1133 case FCPIO_ITMF_REJECTED: 1134 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1135 "abort reject recd. id %d\n", 1136 (int)(id & FNIC_TAG_MASK)); 1137 break; 1138 case FCPIO_IO_NOT_FOUND: 1139 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1140 atomic64_inc(&abts_stats->abort_io_not_found); 1141 else 1142 atomic64_inc( 1143 &term_stats->terminate_io_not_found); 1144 break; 1145 default: 1146 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1147 atomic64_inc(&abts_stats->abort_failures); 1148 else 1149 atomic64_inc( 1150 &term_stats->terminate_failures); 1151 break; 1152 } 1153 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 1154 /* This is a late completion. Ignore it */ 1155 spin_unlock_irqrestore(io_lock, flags); 1156 return; 1157 } 1158 1159 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1160 CMD_ABTS_STATUS(sc) = hdr_status; 1161 1162 /* If the status is IO not found consider it as success */ 1163 if (hdr_status == FCPIO_IO_NOT_FOUND) 1164 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; 1165 1166 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1167 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1168 1169 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1170 "abts cmpl recd. id %d status %s\n", 1171 (int)(id & FNIC_TAG_MASK), 1172 fnic_fcpio_status_to_str(hdr_status)); 1173 1174 /* 1175 * If scsi_eh thread is blocked waiting for abts to complete, 1176 * signal completion to it. IO will be cleaned in the thread 1177 * else clean it in this context 1178 */ 1179 if (io_req->abts_done) { 1180 complete(io_req->abts_done); 1181 spin_unlock_irqrestore(io_lock, flags); 1182 } else { 1183 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1184 "abts cmpl, completing IO\n"); 1185 CMD_SP(sc) = NULL; 1186 sc->result = (DID_ERROR << 16); 1187 1188 spin_unlock_irqrestore(io_lock, flags); 1189 1190 fnic_release_ioreq_buf(fnic, io_req, sc); 1191 mempool_free(io_req, fnic->io_req_pool); 1192 if (sc->scsi_done) { 1193 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1194 sc->device->host->host_no, id, 1195 sc, 1196 jiffies_to_msecs(jiffies - start_time), 1197 desc, 1198 (((u64)hdr_status << 40) | 1199 (u64)sc->cmnd[0] << 32 | 1200 (u64)sc->cmnd[2] << 24 | 1201 (u64)sc->cmnd[3] << 16 | 1202 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1203 (((u64)CMD_FLAGS(sc) << 32) | 1204 CMD_STATE(sc))); 1205 sc->scsi_done(sc); 1206 atomic64_dec(&fnic_stats->io_stats.active_ios); 1207 if (atomic64_read(&fnic->io_cmpl_skip)) 1208 atomic64_dec(&fnic->io_cmpl_skip); 1209 else 1210 atomic64_inc(&fnic_stats->io_stats.io_completions); 1211 } 1212 } 1213 1214 } else if (id & FNIC_TAG_DEV_RST) { 1215 /* Completion of device reset */ 1216 CMD_LR_STATUS(sc) = hdr_status; 1217 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1218 spin_unlock_irqrestore(io_lock, flags); 1219 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1220 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1221 sc->device->host->host_no, id, sc, 1222 jiffies_to_msecs(jiffies - start_time), 1223 desc, 0, 1224 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1225 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1226 "Terminate pending " 1227 "dev reset cmpl recd. id %d status %s\n", 1228 (int)(id & FNIC_TAG_MASK), 1229 fnic_fcpio_status_to_str(hdr_status)); 1230 return; 1231 } 1232 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1233 /* Need to wait for terminate completion */ 1234 spin_unlock_irqrestore(io_lock, flags); 1235 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1236 sc->device->host->host_no, id, sc, 1237 jiffies_to_msecs(jiffies - start_time), 1238 desc, 0, 1239 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1240 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1241 "dev reset cmpl recd after time out. " 1242 "id %d status %s\n", 1243 (int)(id & FNIC_TAG_MASK), 1244 fnic_fcpio_status_to_str(hdr_status)); 1245 return; 1246 } 1247 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1248 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1249 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1250 "dev reset cmpl recd. id %d status %s\n", 1251 (int)(id & FNIC_TAG_MASK), 1252 fnic_fcpio_status_to_str(hdr_status)); 1253 if (io_req->dr_done) 1254 complete(io_req->dr_done); 1255 spin_unlock_irqrestore(io_lock, flags); 1256 1257 } else { 1258 shost_printk(KERN_ERR, fnic->lport->host, 1259 "Unexpected itmf io state %s tag %x\n", 1260 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1261 spin_unlock_irqrestore(io_lock, flags); 1262 } 1263 1264 } 1265 1266 /* 1267 * fnic_fcpio_cmpl_handler 1268 * Routine to service the cq for wq_copy 1269 */ 1270 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1271 unsigned int cq_index, 1272 struct fcpio_fw_req *desc) 1273 { 1274 struct fnic *fnic = vnic_dev_priv(vdev); 1275 1276 switch (desc->hdr.type) { 1277 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1278 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1279 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1280 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1281 case FCPIO_RESET_CMPL: /* fw completed reset */ 1282 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1283 break; 1284 default: 1285 break; 1286 } 1287 1288 switch (desc->hdr.type) { 1289 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1290 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1291 break; 1292 1293 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1294 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1295 break; 1296 1297 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1298 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1299 break; 1300 1301 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1302 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1303 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1304 break; 1305 1306 case FCPIO_RESET_CMPL: /* fw completed reset */ 1307 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1308 break; 1309 1310 default: 1311 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1312 "firmware completion type %d\n", 1313 desc->hdr.type); 1314 break; 1315 } 1316 1317 return 0; 1318 } 1319 1320 /* 1321 * fnic_wq_copy_cmpl_handler 1322 * Routine to process wq copy 1323 */ 1324 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1325 { 1326 unsigned int wq_work_done = 0; 1327 unsigned int i, cq_index; 1328 unsigned int cur_work_done; 1329 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1330 u64 start_jiffies = 0; 1331 u64 end_jiffies = 0; 1332 u64 delta_jiffies = 0; 1333 u64 delta_ms = 0; 1334 1335 for (i = 0; i < fnic->wq_copy_count; i++) { 1336 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1337 1338 start_jiffies = jiffies; 1339 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1340 fnic_fcpio_cmpl_handler, 1341 copy_work_to_do); 1342 end_jiffies = jiffies; 1343 1344 wq_work_done += cur_work_done; 1345 delta_jiffies = end_jiffies - start_jiffies; 1346 if (delta_jiffies > 1347 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { 1348 atomic64_set(&misc_stats->max_isr_jiffies, 1349 delta_jiffies); 1350 delta_ms = jiffies_to_msecs(delta_jiffies); 1351 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); 1352 atomic64_set(&misc_stats->corr_work_done, 1353 cur_work_done); 1354 } 1355 } 1356 return wq_work_done; 1357 } 1358 1359 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) 1360 { 1361 int i; 1362 struct fnic_io_req *io_req; 1363 unsigned long flags = 0; 1364 struct scsi_cmnd *sc; 1365 spinlock_t *io_lock; 1366 unsigned long start_time = 0; 1367 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1368 1369 for (i = 0; i < fnic->fnic_max_tag_id; i++) { 1370 if (i == exclude_id) 1371 continue; 1372 1373 io_lock = fnic_io_lock_tag(fnic, i); 1374 spin_lock_irqsave(io_lock, flags); 1375 sc = scsi_host_find_tag(fnic->lport->host, i); 1376 if (!sc) { 1377 spin_unlock_irqrestore(io_lock, flags); 1378 continue; 1379 } 1380 1381 io_req = (struct fnic_io_req *)CMD_SP(sc); 1382 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1383 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1384 /* 1385 * We will be here only when FW completes reset 1386 * without sending completions for outstanding ios. 1387 */ 1388 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1389 if (io_req && io_req->dr_done) 1390 complete(io_req->dr_done); 1391 else if (io_req && io_req->abts_done) 1392 complete(io_req->abts_done); 1393 spin_unlock_irqrestore(io_lock, flags); 1394 continue; 1395 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1396 spin_unlock_irqrestore(io_lock, flags); 1397 continue; 1398 } 1399 if (!io_req) { 1400 spin_unlock_irqrestore(io_lock, flags); 1401 goto cleanup_scsi_cmd; 1402 } 1403 1404 CMD_SP(sc) = NULL; 1405 1406 spin_unlock_irqrestore(io_lock, flags); 1407 1408 /* 1409 * If there is a scsi_cmnd associated with this io_req, then 1410 * free the corresponding state 1411 */ 1412 start_time = io_req->start_time; 1413 fnic_release_ioreq_buf(fnic, io_req, sc); 1414 mempool_free(io_req, fnic->io_req_pool); 1415 1416 cleanup_scsi_cmd: 1417 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1418 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1419 "%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", 1420 __func__, sc->request->tag, sc, 1421 (jiffies - start_time)); 1422 1423 if (atomic64_read(&fnic->io_cmpl_skip)) 1424 atomic64_dec(&fnic->io_cmpl_skip); 1425 else 1426 atomic64_inc(&fnic_stats->io_stats.io_completions); 1427 1428 /* Complete the command to SCSI */ 1429 if (sc->scsi_done) { 1430 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) 1431 shost_printk(KERN_ERR, fnic->lport->host, 1432 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", 1433 sc->request->tag, sc); 1434 1435 FNIC_TRACE(fnic_cleanup_io, 1436 sc->device->host->host_no, i, sc, 1437 jiffies_to_msecs(jiffies - start_time), 1438 0, ((u64)sc->cmnd[0] << 32 | 1439 (u64)sc->cmnd[2] << 24 | 1440 (u64)sc->cmnd[3] << 16 | 1441 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1442 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1443 1444 sc->scsi_done(sc); 1445 } 1446 } 1447 } 1448 1449 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1450 struct fcpio_host_req *desc) 1451 { 1452 u32 id; 1453 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1454 struct fnic_io_req *io_req; 1455 struct scsi_cmnd *sc; 1456 unsigned long flags; 1457 spinlock_t *io_lock; 1458 unsigned long start_time = 0; 1459 1460 /* get the tag reference */ 1461 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1462 id &= FNIC_TAG_MASK; 1463 1464 if (id >= fnic->fnic_max_tag_id) 1465 return; 1466 1467 sc = scsi_host_find_tag(fnic->lport->host, id); 1468 if (!sc) 1469 return; 1470 1471 io_lock = fnic_io_lock_hash(fnic, sc); 1472 spin_lock_irqsave(io_lock, flags); 1473 1474 /* Get the IO context which this desc refers to */ 1475 io_req = (struct fnic_io_req *)CMD_SP(sc); 1476 1477 /* fnic interrupts are turned off by now */ 1478 1479 if (!io_req) { 1480 spin_unlock_irqrestore(io_lock, flags); 1481 goto wq_copy_cleanup_scsi_cmd; 1482 } 1483 1484 CMD_SP(sc) = NULL; 1485 1486 spin_unlock_irqrestore(io_lock, flags); 1487 1488 start_time = io_req->start_time; 1489 fnic_release_ioreq_buf(fnic, io_req, sc); 1490 mempool_free(io_req, fnic->io_req_pool); 1491 1492 wq_copy_cleanup_scsi_cmd: 1493 sc->result = DID_NO_CONNECT << 16; 1494 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1495 " DID_NO_CONNECT\n"); 1496 1497 if (sc->scsi_done) { 1498 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1499 sc->device->host->host_no, id, sc, 1500 jiffies_to_msecs(jiffies - start_time), 1501 0, ((u64)sc->cmnd[0] << 32 | 1502 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1503 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1504 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1505 1506 sc->scsi_done(sc); 1507 } 1508 } 1509 1510 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1511 u32 task_req, u8 *fc_lun, 1512 struct fnic_io_req *io_req) 1513 { 1514 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1515 struct Scsi_Host *host = fnic->lport->host; 1516 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1517 unsigned long flags; 1518 1519 spin_lock_irqsave(host->host_lock, flags); 1520 if (unlikely(fnic_chk_state_flags_locked(fnic, 1521 FNIC_FLAGS_IO_BLOCKED))) { 1522 spin_unlock_irqrestore(host->host_lock, flags); 1523 return 1; 1524 } else 1525 atomic_inc(&fnic->in_flight); 1526 spin_unlock_irqrestore(host->host_lock, flags); 1527 1528 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1529 1530 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1531 free_wq_copy_descs(fnic, wq); 1532 1533 if (!vnic_wq_copy_desc_avail(wq)) { 1534 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1535 atomic_dec(&fnic->in_flight); 1536 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1537 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1538 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1539 return 1; 1540 } 1541 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1542 0, task_req, tag, fc_lun, io_req->port_id, 1543 fnic->config.ra_tov, fnic->config.ed_tov); 1544 1545 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1546 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1547 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1548 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1549 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1550 1551 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1552 atomic_dec(&fnic->in_flight); 1553 1554 return 0; 1555 } 1556 1557 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1558 { 1559 int tag; 1560 int abt_tag; 1561 int term_cnt = 0; 1562 struct fnic_io_req *io_req; 1563 spinlock_t *io_lock; 1564 unsigned long flags; 1565 struct scsi_cmnd *sc; 1566 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1567 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1568 struct scsi_lun fc_lun; 1569 enum fnic_ioreq_state old_ioreq_state; 1570 1571 FNIC_SCSI_DBG(KERN_DEBUG, 1572 fnic->lport->host, 1573 "fnic_rport_exch_reset called portid 0x%06x\n", 1574 port_id); 1575 1576 if (fnic->in_remove) 1577 return; 1578 1579 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1580 abt_tag = tag; 1581 io_lock = fnic_io_lock_tag(fnic, tag); 1582 spin_lock_irqsave(io_lock, flags); 1583 sc = scsi_host_find_tag(fnic->lport->host, tag); 1584 if (!sc) { 1585 spin_unlock_irqrestore(io_lock, flags); 1586 continue; 1587 } 1588 1589 io_req = (struct fnic_io_req *)CMD_SP(sc); 1590 1591 if (!io_req || io_req->port_id != port_id) { 1592 spin_unlock_irqrestore(io_lock, flags); 1593 continue; 1594 } 1595 1596 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1597 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1598 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1599 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1600 sc); 1601 spin_unlock_irqrestore(io_lock, flags); 1602 continue; 1603 } 1604 1605 /* 1606 * Found IO that is still pending with firmware and 1607 * belongs to rport that went away 1608 */ 1609 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1610 spin_unlock_irqrestore(io_lock, flags); 1611 continue; 1612 } 1613 if (io_req->abts_done) { 1614 shost_printk(KERN_ERR, fnic->lport->host, 1615 "fnic_rport_exch_reset: io_req->abts_done is set " 1616 "state is %s\n", 1617 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1618 } 1619 1620 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1621 shost_printk(KERN_ERR, fnic->lport->host, 1622 "rport_exch_reset " 1623 "IO not yet issued %p tag 0x%x flags " 1624 "%x state %d\n", 1625 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1626 } 1627 old_ioreq_state = CMD_STATE(sc); 1628 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1629 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1630 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1631 atomic64_inc(&reset_stats->device_reset_terminates); 1632 abt_tag = (tag | FNIC_TAG_DEV_RST); 1633 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1634 "fnic_rport_exch_reset dev rst sc 0x%p\n", 1635 sc); 1636 } 1637 1638 BUG_ON(io_req->abts_done); 1639 1640 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1641 "fnic_rport_reset_exch: Issuing abts\n"); 1642 1643 spin_unlock_irqrestore(io_lock, flags); 1644 1645 /* Now queue the abort command to firmware */ 1646 int_to_scsilun(sc->device->lun, &fc_lun); 1647 1648 if (fnic_queue_abort_io_req(fnic, abt_tag, 1649 FCPIO_ITMF_ABT_TASK_TERM, 1650 fc_lun.scsi_lun, io_req)) { 1651 /* 1652 * Revert the cmd state back to old state, if 1653 * it hasn't changed in between. This cmd will get 1654 * aborted later by scsi_eh, or cleaned up during 1655 * lun reset 1656 */ 1657 spin_lock_irqsave(io_lock, flags); 1658 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1659 CMD_STATE(sc) = old_ioreq_state; 1660 spin_unlock_irqrestore(io_lock, flags); 1661 } else { 1662 spin_lock_irqsave(io_lock, flags); 1663 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1664 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1665 else 1666 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1667 spin_unlock_irqrestore(io_lock, flags); 1668 atomic64_inc(&term_stats->terminates); 1669 term_cnt++; 1670 } 1671 } 1672 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1673 atomic64_set(&term_stats->max_terminates, term_cnt); 1674 1675 } 1676 1677 void fnic_terminate_rport_io(struct fc_rport *rport) 1678 { 1679 int tag; 1680 int abt_tag; 1681 int term_cnt = 0; 1682 struct fnic_io_req *io_req; 1683 spinlock_t *io_lock; 1684 unsigned long flags; 1685 struct scsi_cmnd *sc; 1686 struct scsi_lun fc_lun; 1687 struct fc_rport_libfc_priv *rdata; 1688 struct fc_lport *lport; 1689 struct fnic *fnic; 1690 struct fc_rport *cmd_rport; 1691 struct reset_stats *reset_stats; 1692 struct terminate_stats *term_stats; 1693 enum fnic_ioreq_state old_ioreq_state; 1694 1695 if (!rport) { 1696 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1697 return; 1698 } 1699 rdata = rport->dd_data; 1700 1701 if (!rdata) { 1702 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1703 return; 1704 } 1705 lport = rdata->local_port; 1706 1707 if (!lport) { 1708 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1709 return; 1710 } 1711 fnic = lport_priv(lport); 1712 FNIC_SCSI_DBG(KERN_DEBUG, 1713 fnic->lport->host, "fnic_terminate_rport_io called" 1714 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1715 rport->port_name, rport->node_name, rport, 1716 rport->port_id); 1717 1718 if (fnic->in_remove) 1719 return; 1720 1721 reset_stats = &fnic->fnic_stats.reset_stats; 1722 term_stats = &fnic->fnic_stats.term_stats; 1723 1724 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1725 abt_tag = tag; 1726 io_lock = fnic_io_lock_tag(fnic, tag); 1727 spin_lock_irqsave(io_lock, flags); 1728 sc = scsi_host_find_tag(fnic->lport->host, tag); 1729 if (!sc) { 1730 spin_unlock_irqrestore(io_lock, flags); 1731 continue; 1732 } 1733 1734 cmd_rport = starget_to_rport(scsi_target(sc->device)); 1735 if (rport != cmd_rport) { 1736 spin_unlock_irqrestore(io_lock, flags); 1737 continue; 1738 } 1739 1740 io_req = (struct fnic_io_req *)CMD_SP(sc); 1741 1742 if (!io_req || rport != cmd_rport) { 1743 spin_unlock_irqrestore(io_lock, flags); 1744 continue; 1745 } 1746 1747 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1748 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1749 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1750 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", 1751 sc); 1752 spin_unlock_irqrestore(io_lock, flags); 1753 continue; 1754 } 1755 /* 1756 * Found IO that is still pending with firmware and 1757 * belongs to rport that went away 1758 */ 1759 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1760 spin_unlock_irqrestore(io_lock, flags); 1761 continue; 1762 } 1763 if (io_req->abts_done) { 1764 shost_printk(KERN_ERR, fnic->lport->host, 1765 "fnic_terminate_rport_io: io_req->abts_done is set " 1766 "state is %s\n", 1767 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1768 } 1769 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1770 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1771 "fnic_terminate_rport_io " 1772 "IO not yet issued %p tag 0x%x flags " 1773 "%x state %d\n", 1774 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1775 } 1776 old_ioreq_state = CMD_STATE(sc); 1777 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1778 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1779 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1780 atomic64_inc(&reset_stats->device_reset_terminates); 1781 abt_tag = (tag | FNIC_TAG_DEV_RST); 1782 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1783 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); 1784 } 1785 1786 BUG_ON(io_req->abts_done); 1787 1788 FNIC_SCSI_DBG(KERN_DEBUG, 1789 fnic->lport->host, 1790 "fnic_terminate_rport_io: Issuing abts\n"); 1791 1792 spin_unlock_irqrestore(io_lock, flags); 1793 1794 /* Now queue the abort command to firmware */ 1795 int_to_scsilun(sc->device->lun, &fc_lun); 1796 1797 if (fnic_queue_abort_io_req(fnic, abt_tag, 1798 FCPIO_ITMF_ABT_TASK_TERM, 1799 fc_lun.scsi_lun, io_req)) { 1800 /* 1801 * Revert the cmd state back to old state, if 1802 * it hasn't changed in between. This cmd will get 1803 * aborted later by scsi_eh, or cleaned up during 1804 * lun reset 1805 */ 1806 spin_lock_irqsave(io_lock, flags); 1807 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1808 CMD_STATE(sc) = old_ioreq_state; 1809 spin_unlock_irqrestore(io_lock, flags); 1810 } else { 1811 spin_lock_irqsave(io_lock, flags); 1812 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1813 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1814 else 1815 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1816 spin_unlock_irqrestore(io_lock, flags); 1817 atomic64_inc(&term_stats->terminates); 1818 term_cnt++; 1819 } 1820 } 1821 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1822 atomic64_set(&term_stats->max_terminates, term_cnt); 1823 1824 } 1825 1826 /* 1827 * This function is exported to SCSI for sending abort cmnds. 1828 * A SCSI IO is represented by a io_req in the driver. 1829 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1830 */ 1831 int fnic_abort_cmd(struct scsi_cmnd *sc) 1832 { 1833 struct fc_lport *lp; 1834 struct fnic *fnic; 1835 struct fnic_io_req *io_req = NULL; 1836 struct fc_rport *rport; 1837 spinlock_t *io_lock; 1838 unsigned long flags; 1839 unsigned long start_time = 0; 1840 int ret = SUCCESS; 1841 u32 task_req = 0; 1842 struct scsi_lun fc_lun; 1843 struct fnic_stats *fnic_stats; 1844 struct abort_stats *abts_stats; 1845 struct terminate_stats *term_stats; 1846 enum fnic_ioreq_state old_ioreq_state; 1847 int tag; 1848 unsigned long abt_issued_time; 1849 DECLARE_COMPLETION_ONSTACK(tm_done); 1850 1851 /* Wait for rport to unblock */ 1852 fc_block_scsi_eh(sc); 1853 1854 /* Get local-port, check ready and link up */ 1855 lp = shost_priv(sc->device->host); 1856 1857 fnic = lport_priv(lp); 1858 fnic_stats = &fnic->fnic_stats; 1859 abts_stats = &fnic->fnic_stats.abts_stats; 1860 term_stats = &fnic->fnic_stats.term_stats; 1861 1862 rport = starget_to_rport(scsi_target(sc->device)); 1863 tag = sc->request->tag; 1864 FNIC_SCSI_DBG(KERN_DEBUG, 1865 fnic->lport->host, 1866 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1867 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1868 1869 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1870 1871 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1872 ret = FAILED; 1873 goto fnic_abort_cmd_end; 1874 } 1875 1876 /* 1877 * Avoid a race between SCSI issuing the abort and the device 1878 * completing the command. 1879 * 1880 * If the command is already completed by the fw cmpl code, 1881 * we just return SUCCESS from here. This means that the abort 1882 * succeeded. In the SCSI ML, since the timeout for command has 1883 * happened, the completion wont actually complete the command 1884 * and it will be considered as an aborted command 1885 * 1886 * The CMD_SP will not be cleared except while holding io_req_lock. 1887 */ 1888 io_lock = fnic_io_lock_hash(fnic, sc); 1889 spin_lock_irqsave(io_lock, flags); 1890 io_req = (struct fnic_io_req *)CMD_SP(sc); 1891 if (!io_req) { 1892 spin_unlock_irqrestore(io_lock, flags); 1893 goto fnic_abort_cmd_end; 1894 } 1895 1896 io_req->abts_done = &tm_done; 1897 1898 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1899 spin_unlock_irqrestore(io_lock, flags); 1900 goto wait_pending; 1901 } 1902 1903 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1904 if (abt_issued_time <= 6000) 1905 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1906 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1907 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1908 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1909 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1910 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1911 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1912 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1913 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1914 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1915 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1916 else 1917 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1918 1919 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1920 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1921 /* 1922 * Command is still pending, need to abort it 1923 * If the firmware completes the command after this point, 1924 * the completion wont be done till mid-layer, since abort 1925 * has already started. 1926 */ 1927 old_ioreq_state = CMD_STATE(sc); 1928 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1929 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1930 1931 spin_unlock_irqrestore(io_lock, flags); 1932 1933 /* 1934 * Check readiness of the remote port. If the path to remote 1935 * port is up, then send abts to the remote port to terminate 1936 * the IO. Else, just locally terminate the IO in the firmware 1937 */ 1938 if (fc_remote_port_chkready(rport) == 0) 1939 task_req = FCPIO_ITMF_ABT_TASK; 1940 else { 1941 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1942 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1943 } 1944 1945 /* Now queue the abort command to firmware */ 1946 int_to_scsilun(sc->device->lun, &fc_lun); 1947 1948 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1949 fc_lun.scsi_lun, io_req)) { 1950 spin_lock_irqsave(io_lock, flags); 1951 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1952 CMD_STATE(sc) = old_ioreq_state; 1953 io_req = (struct fnic_io_req *)CMD_SP(sc); 1954 if (io_req) 1955 io_req->abts_done = NULL; 1956 spin_unlock_irqrestore(io_lock, flags); 1957 ret = FAILED; 1958 goto fnic_abort_cmd_end; 1959 } 1960 if (task_req == FCPIO_ITMF_ABT_TASK) { 1961 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1962 atomic64_inc(&fnic_stats->abts_stats.aborts); 1963 } else { 1964 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1965 atomic64_inc(&fnic_stats->term_stats.terminates); 1966 } 1967 1968 /* 1969 * We queued an abort IO, wait for its completion. 1970 * Once the firmware completes the abort command, it will 1971 * wake up this thread. 1972 */ 1973 wait_pending: 1974 wait_for_completion_timeout(&tm_done, 1975 msecs_to_jiffies 1976 (2 * fnic->config.ra_tov + 1977 fnic->config.ed_tov)); 1978 1979 /* Check the abort status */ 1980 spin_lock_irqsave(io_lock, flags); 1981 1982 io_req = (struct fnic_io_req *)CMD_SP(sc); 1983 if (!io_req) { 1984 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1985 spin_unlock_irqrestore(io_lock, flags); 1986 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1987 ret = FAILED; 1988 goto fnic_abort_cmd_end; 1989 } 1990 io_req->abts_done = NULL; 1991 1992 /* fw did not complete abort, timed out */ 1993 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1994 spin_unlock_irqrestore(io_lock, flags); 1995 if (task_req == FCPIO_ITMF_ABT_TASK) { 1996 atomic64_inc(&abts_stats->abort_drv_timeouts); 1997 } else { 1998 atomic64_inc(&term_stats->terminate_drv_timeouts); 1999 } 2000 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 2001 ret = FAILED; 2002 goto fnic_abort_cmd_end; 2003 } 2004 2005 /* IO out of order */ 2006 2007 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 2008 spin_unlock_irqrestore(io_lock, flags); 2009 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2010 "Issuing Host reset due to out of order IO\n"); 2011 2012 ret = FAILED; 2013 goto fnic_abort_cmd_end; 2014 } 2015 2016 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2017 2018 start_time = io_req->start_time; 2019 /* 2020 * firmware completed the abort, check the status, 2021 * free the io_req if successful. If abort fails, 2022 * Device reset will clean the I/O. 2023 */ 2024 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) 2025 CMD_SP(sc) = NULL; 2026 else { 2027 ret = FAILED; 2028 spin_unlock_irqrestore(io_lock, flags); 2029 goto fnic_abort_cmd_end; 2030 } 2031 2032 spin_unlock_irqrestore(io_lock, flags); 2033 2034 fnic_release_ioreq_buf(fnic, io_req, sc); 2035 mempool_free(io_req, fnic->io_req_pool); 2036 2037 if (sc->scsi_done) { 2038 /* Call SCSI completion function to complete the IO */ 2039 sc->result = (DID_ABORT << 16); 2040 sc->scsi_done(sc); 2041 atomic64_dec(&fnic_stats->io_stats.active_ios); 2042 if (atomic64_read(&fnic->io_cmpl_skip)) 2043 atomic64_dec(&fnic->io_cmpl_skip); 2044 else 2045 atomic64_inc(&fnic_stats->io_stats.io_completions); 2046 } 2047 2048 fnic_abort_cmd_end: 2049 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 2050 sc->request->tag, sc, 2051 jiffies_to_msecs(jiffies - start_time), 2052 0, ((u64)sc->cmnd[0] << 32 | 2053 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2054 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2055 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2056 2057 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2058 "Returning from abort cmd type %x %s\n", task_req, 2059 (ret == SUCCESS) ? 2060 "SUCCESS" : "FAILED"); 2061 return ret; 2062 } 2063 2064 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 2065 struct scsi_cmnd *sc, 2066 struct fnic_io_req *io_req) 2067 { 2068 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 2069 struct Scsi_Host *host = fnic->lport->host; 2070 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 2071 struct scsi_lun fc_lun; 2072 int ret = 0; 2073 unsigned long intr_flags; 2074 2075 spin_lock_irqsave(host->host_lock, intr_flags); 2076 if (unlikely(fnic_chk_state_flags_locked(fnic, 2077 FNIC_FLAGS_IO_BLOCKED))) { 2078 spin_unlock_irqrestore(host->host_lock, intr_flags); 2079 return FAILED; 2080 } else 2081 atomic_inc(&fnic->in_flight); 2082 spin_unlock_irqrestore(host->host_lock, intr_flags); 2083 2084 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 2085 2086 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 2087 free_wq_copy_descs(fnic, wq); 2088 2089 if (!vnic_wq_copy_desc_avail(wq)) { 2090 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2091 "queue_dr_io_req failure - no descriptors\n"); 2092 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 2093 ret = -EAGAIN; 2094 goto lr_io_req_end; 2095 } 2096 2097 /* fill in the lun info */ 2098 int_to_scsilun(sc->device->lun, &fc_lun); 2099 2100 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 2101 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 2102 fc_lun.scsi_lun, io_req->port_id, 2103 fnic->config.ra_tov, fnic->config.ed_tov); 2104 2105 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 2106 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 2107 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 2108 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 2109 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 2110 2111 lr_io_req_end: 2112 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 2113 atomic_dec(&fnic->in_flight); 2114 2115 return ret; 2116 } 2117 2118 /* 2119 * Clean up any pending aborts on the lun 2120 * For each outstanding IO on this lun, whose abort is not completed by fw, 2121 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2122 * successfully aborted, 1 otherwise 2123 */ 2124 static int fnic_clean_pending_aborts(struct fnic *fnic, 2125 struct scsi_cmnd *lr_sc, 2126 bool new_sc) 2127 2128 { 2129 int tag, abt_tag; 2130 struct fnic_io_req *io_req; 2131 spinlock_t *io_lock; 2132 unsigned long flags; 2133 int ret = 0; 2134 struct scsi_cmnd *sc; 2135 struct scsi_lun fc_lun; 2136 struct scsi_device *lun_dev = lr_sc->device; 2137 DECLARE_COMPLETION_ONSTACK(tm_done); 2138 enum fnic_ioreq_state old_ioreq_state; 2139 2140 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2141 io_lock = fnic_io_lock_tag(fnic, tag); 2142 spin_lock_irqsave(io_lock, flags); 2143 sc = scsi_host_find_tag(fnic->lport->host, tag); 2144 /* 2145 * ignore this lun reset cmd if issued using new SC 2146 * or cmds that do not belong to this lun 2147 */ 2148 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) { 2149 spin_unlock_irqrestore(io_lock, flags); 2150 continue; 2151 } 2152 2153 io_req = (struct fnic_io_req *)CMD_SP(sc); 2154 2155 if (!io_req || sc->device != lun_dev) { 2156 spin_unlock_irqrestore(io_lock, flags); 2157 continue; 2158 } 2159 2160 /* 2161 * Found IO that is still pending with firmware and 2162 * belongs to the LUN that we are resetting 2163 */ 2164 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2165 "Found IO in %s on lun\n", 2166 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2167 2168 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2169 spin_unlock_irqrestore(io_lock, flags); 2170 continue; 2171 } 2172 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 2173 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 2174 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2175 "%s dev rst not pending sc 0x%p\n", __func__, 2176 sc); 2177 spin_unlock_irqrestore(io_lock, flags); 2178 continue; 2179 } 2180 2181 if (io_req->abts_done) 2182 shost_printk(KERN_ERR, fnic->lport->host, 2183 "%s: io_req->abts_done is set state is %s\n", 2184 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 2185 old_ioreq_state = CMD_STATE(sc); 2186 /* 2187 * Any pending IO issued prior to reset is expected to be 2188 * in abts pending state, if not we need to set 2189 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2190 * When IO is completed, the IO will be handed over and 2191 * handled in this function. 2192 */ 2193 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2194 2195 BUG_ON(io_req->abts_done); 2196 2197 abt_tag = tag; 2198 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 2199 abt_tag |= FNIC_TAG_DEV_RST; 2200 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2201 "%s: dev rst sc 0x%p\n", __func__, sc); 2202 } 2203 2204 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 2205 io_req->abts_done = &tm_done; 2206 spin_unlock_irqrestore(io_lock, flags); 2207 2208 /* Now queue the abort command to firmware */ 2209 int_to_scsilun(sc->device->lun, &fc_lun); 2210 2211 if (fnic_queue_abort_io_req(fnic, abt_tag, 2212 FCPIO_ITMF_ABT_TASK_TERM, 2213 fc_lun.scsi_lun, io_req)) { 2214 spin_lock_irqsave(io_lock, flags); 2215 io_req = (struct fnic_io_req *)CMD_SP(sc); 2216 if (io_req) 2217 io_req->abts_done = NULL; 2218 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2219 CMD_STATE(sc) = old_ioreq_state; 2220 spin_unlock_irqrestore(io_lock, flags); 2221 ret = 1; 2222 goto clean_pending_aborts_end; 2223 } else { 2224 spin_lock_irqsave(io_lock, flags); 2225 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 2226 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2227 spin_unlock_irqrestore(io_lock, flags); 2228 } 2229 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 2230 2231 wait_for_completion_timeout(&tm_done, 2232 msecs_to_jiffies 2233 (fnic->config.ed_tov)); 2234 2235 /* Recheck cmd state to check if it is now aborted */ 2236 spin_lock_irqsave(io_lock, flags); 2237 io_req = (struct fnic_io_req *)CMD_SP(sc); 2238 if (!io_req) { 2239 spin_unlock_irqrestore(io_lock, flags); 2240 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 2241 continue; 2242 } 2243 2244 io_req->abts_done = NULL; 2245 2246 /* if abort is still pending with fw, fail */ 2247 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 2248 spin_unlock_irqrestore(io_lock, flags); 2249 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 2250 ret = 1; 2251 goto clean_pending_aborts_end; 2252 } 2253 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2254 2255 /* original sc used for lr is handled by dev reset code */ 2256 if (sc != lr_sc) 2257 CMD_SP(sc) = NULL; 2258 spin_unlock_irqrestore(io_lock, flags); 2259 2260 /* original sc used for lr is handled by dev reset code */ 2261 if (sc != lr_sc) { 2262 fnic_release_ioreq_buf(fnic, io_req, sc); 2263 mempool_free(io_req, fnic->io_req_pool); 2264 } 2265 2266 /* 2267 * Any IO is returned during reset, it needs to call scsi_done 2268 * to return the scsi_cmnd to upper layer. 2269 */ 2270 if (sc->scsi_done) { 2271 /* Set result to let upper SCSI layer retry */ 2272 sc->result = DID_RESET << 16; 2273 sc->scsi_done(sc); 2274 } 2275 } 2276 2277 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2278 2279 /* walk again to check, if IOs are still pending in fw */ 2280 if (fnic_is_abts_pending(fnic, lr_sc)) 2281 ret = FAILED; 2282 2283 clean_pending_aborts_end: 2284 return ret; 2285 } 2286 2287 /** 2288 * fnic_scsi_host_start_tag 2289 * Allocates tagid from host's tag list 2290 **/ 2291 static inline int 2292 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2293 { 2294 struct request_queue *q = sc->request->q; 2295 struct request *dummy; 2296 2297 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); 2298 if (IS_ERR(dummy)) 2299 return SCSI_NO_TAG; 2300 2301 sc->tag = sc->request->tag = dummy->tag; 2302 sc->host_scribble = (unsigned char *)dummy; 2303 2304 return dummy->tag; 2305 } 2306 2307 /** 2308 * fnic_scsi_host_end_tag 2309 * frees tag allocated by fnic_scsi_host_start_tag. 2310 **/ 2311 static inline void 2312 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2313 { 2314 struct request *dummy = (struct request *)sc->host_scribble; 2315 2316 blk_mq_free_request(dummy); 2317 } 2318 2319 /* 2320 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2321 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2322 * on the LUN. 2323 */ 2324 int fnic_device_reset(struct scsi_cmnd *sc) 2325 { 2326 struct fc_lport *lp; 2327 struct fnic *fnic; 2328 struct fnic_io_req *io_req = NULL; 2329 struct fc_rport *rport; 2330 int status; 2331 int ret = FAILED; 2332 spinlock_t *io_lock; 2333 unsigned long flags; 2334 unsigned long start_time = 0; 2335 struct scsi_lun fc_lun; 2336 struct fnic_stats *fnic_stats; 2337 struct reset_stats *reset_stats; 2338 int tag = 0; 2339 DECLARE_COMPLETION_ONSTACK(tm_done); 2340 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2341 bool new_sc = 0; 2342 2343 /* Wait for rport to unblock */ 2344 fc_block_scsi_eh(sc); 2345 2346 /* Get local-port, check ready and link up */ 2347 lp = shost_priv(sc->device->host); 2348 2349 fnic = lport_priv(lp); 2350 fnic_stats = &fnic->fnic_stats; 2351 reset_stats = &fnic->fnic_stats.reset_stats; 2352 2353 atomic64_inc(&reset_stats->device_resets); 2354 2355 rport = starget_to_rport(scsi_target(sc->device)); 2356 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2357 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2358 rport->port_id, sc->device->lun, sc); 2359 2360 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2361 goto fnic_device_reset_end; 2362 2363 /* Check if remote port up */ 2364 if (fc_remote_port_chkready(rport)) { 2365 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2366 goto fnic_device_reset_end; 2367 } 2368 2369 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2370 /* Allocate tag if not present */ 2371 2372 tag = sc->request->tag; 2373 if (unlikely(tag < 0)) { 2374 /* 2375 * Really should fix the midlayer to pass in a proper 2376 * request for ioctls... 2377 */ 2378 tag = fnic_scsi_host_start_tag(fnic, sc); 2379 if (unlikely(tag == SCSI_NO_TAG)) 2380 goto fnic_device_reset_end; 2381 tag_gen_flag = 1; 2382 new_sc = 1; 2383 } 2384 io_lock = fnic_io_lock_hash(fnic, sc); 2385 spin_lock_irqsave(io_lock, flags); 2386 io_req = (struct fnic_io_req *)CMD_SP(sc); 2387 2388 /* 2389 * If there is a io_req attached to this command, then use it, 2390 * else allocate a new one. 2391 */ 2392 if (!io_req) { 2393 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2394 if (!io_req) { 2395 spin_unlock_irqrestore(io_lock, flags); 2396 goto fnic_device_reset_end; 2397 } 2398 memset(io_req, 0, sizeof(*io_req)); 2399 io_req->port_id = rport->port_id; 2400 CMD_SP(sc) = (char *)io_req; 2401 } 2402 io_req->dr_done = &tm_done; 2403 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2404 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2405 spin_unlock_irqrestore(io_lock, flags); 2406 2407 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2408 2409 /* 2410 * issue the device reset, if enqueue failed, clean up the ioreq 2411 * and break assoc with scsi cmd 2412 */ 2413 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2414 spin_lock_irqsave(io_lock, flags); 2415 io_req = (struct fnic_io_req *)CMD_SP(sc); 2416 if (io_req) 2417 io_req->dr_done = NULL; 2418 goto fnic_device_reset_clean; 2419 } 2420 spin_lock_irqsave(io_lock, flags); 2421 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2422 spin_unlock_irqrestore(io_lock, flags); 2423 2424 /* 2425 * Wait on the local completion for LUN reset. The io_req may be 2426 * freed while we wait since we hold no lock. 2427 */ 2428 wait_for_completion_timeout(&tm_done, 2429 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2430 2431 spin_lock_irqsave(io_lock, flags); 2432 io_req = (struct fnic_io_req *)CMD_SP(sc); 2433 if (!io_req) { 2434 spin_unlock_irqrestore(io_lock, flags); 2435 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2436 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2437 goto fnic_device_reset_end; 2438 } 2439 io_req->dr_done = NULL; 2440 2441 status = CMD_LR_STATUS(sc); 2442 2443 /* 2444 * If lun reset not completed, bail out with failed. io_req 2445 * gets cleaned up during higher levels of EH 2446 */ 2447 if (status == FCPIO_INVALID_CODE) { 2448 atomic64_inc(&reset_stats->device_reset_timeouts); 2449 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2450 "Device reset timed out\n"); 2451 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2452 spin_unlock_irqrestore(io_lock, flags); 2453 int_to_scsilun(sc->device->lun, &fc_lun); 2454 /* 2455 * Issue abort and terminate on device reset request. 2456 * If q'ing of terminate fails, retry it after a delay. 2457 */ 2458 while (1) { 2459 spin_lock_irqsave(io_lock, flags); 2460 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2461 spin_unlock_irqrestore(io_lock, flags); 2462 break; 2463 } 2464 spin_unlock_irqrestore(io_lock, flags); 2465 if (fnic_queue_abort_io_req(fnic, 2466 tag | FNIC_TAG_DEV_RST, 2467 FCPIO_ITMF_ABT_TASK_TERM, 2468 fc_lun.scsi_lun, io_req)) { 2469 wait_for_completion_timeout(&tm_done, 2470 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2471 } else { 2472 spin_lock_irqsave(io_lock, flags); 2473 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2474 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2475 io_req->abts_done = &tm_done; 2476 spin_unlock_irqrestore(io_lock, flags); 2477 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2478 "Abort and terminate issued on Device reset " 2479 "tag 0x%x sc 0x%p\n", tag, sc); 2480 break; 2481 } 2482 } 2483 while (1) { 2484 spin_lock_irqsave(io_lock, flags); 2485 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2486 spin_unlock_irqrestore(io_lock, flags); 2487 wait_for_completion_timeout(&tm_done, 2488 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2489 break; 2490 } else { 2491 io_req = (struct fnic_io_req *)CMD_SP(sc); 2492 io_req->abts_done = NULL; 2493 goto fnic_device_reset_clean; 2494 } 2495 } 2496 } else { 2497 spin_unlock_irqrestore(io_lock, flags); 2498 } 2499 2500 /* Completed, but not successful, clean up the io_req, return fail */ 2501 if (status != FCPIO_SUCCESS) { 2502 spin_lock_irqsave(io_lock, flags); 2503 FNIC_SCSI_DBG(KERN_DEBUG, 2504 fnic->lport->host, 2505 "Device reset completed - failed\n"); 2506 io_req = (struct fnic_io_req *)CMD_SP(sc); 2507 goto fnic_device_reset_clean; 2508 } 2509 2510 /* 2511 * Clean up any aborts on this lun that have still not 2512 * completed. If any of these fail, then LUN reset fails. 2513 * clean_pending_aborts cleans all cmds on this lun except 2514 * the lun reset cmd. If all cmds get cleaned, the lun reset 2515 * succeeds 2516 */ 2517 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2518 spin_lock_irqsave(io_lock, flags); 2519 io_req = (struct fnic_io_req *)CMD_SP(sc); 2520 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2521 "Device reset failed" 2522 " since could not abort all IOs\n"); 2523 goto fnic_device_reset_clean; 2524 } 2525 2526 /* Clean lun reset command */ 2527 spin_lock_irqsave(io_lock, flags); 2528 io_req = (struct fnic_io_req *)CMD_SP(sc); 2529 if (io_req) 2530 /* Completed, and successful */ 2531 ret = SUCCESS; 2532 2533 fnic_device_reset_clean: 2534 if (io_req) 2535 CMD_SP(sc) = NULL; 2536 2537 spin_unlock_irqrestore(io_lock, flags); 2538 2539 if (io_req) { 2540 start_time = io_req->start_time; 2541 fnic_release_ioreq_buf(fnic, io_req, sc); 2542 mempool_free(io_req, fnic->io_req_pool); 2543 } 2544 2545 fnic_device_reset_end: 2546 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2547 sc->request->tag, sc, 2548 jiffies_to_msecs(jiffies - start_time), 2549 0, ((u64)sc->cmnd[0] << 32 | 2550 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2551 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2552 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2553 2554 /* free tag if it is allocated */ 2555 if (unlikely(tag_gen_flag)) 2556 fnic_scsi_host_end_tag(fnic, sc); 2557 2558 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2559 "Returning from device reset %s\n", 2560 (ret == SUCCESS) ? 2561 "SUCCESS" : "FAILED"); 2562 2563 if (ret == FAILED) 2564 atomic64_inc(&reset_stats->device_reset_failures); 2565 2566 return ret; 2567 } 2568 2569 /* Clean up all IOs, clean up libFC local port */ 2570 int fnic_reset(struct Scsi_Host *shost) 2571 { 2572 struct fc_lport *lp; 2573 struct fnic *fnic; 2574 int ret = 0; 2575 struct reset_stats *reset_stats; 2576 2577 lp = shost_priv(shost); 2578 fnic = lport_priv(lp); 2579 reset_stats = &fnic->fnic_stats.reset_stats; 2580 2581 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2582 "fnic_reset called\n"); 2583 2584 atomic64_inc(&reset_stats->fnic_resets); 2585 2586 /* 2587 * Reset local port, this will clean up libFC exchanges, 2588 * reset remote port sessions, and if link is up, begin flogi 2589 */ 2590 ret = fc_lport_reset(lp); 2591 2592 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2593 "Returning from fnic reset %s\n", 2594 (ret == 0) ? 2595 "SUCCESS" : "FAILED"); 2596 2597 if (ret == 0) 2598 atomic64_inc(&reset_stats->fnic_reset_completions); 2599 else 2600 atomic64_inc(&reset_stats->fnic_reset_failures); 2601 2602 return ret; 2603 } 2604 2605 /* 2606 * SCSI Error handling calls driver's eh_host_reset if all prior 2607 * error handling levels return FAILED. If host reset completes 2608 * successfully, and if link is up, then Fabric login begins. 2609 * 2610 * Host Reset is the highest level of error recovery. If this fails, then 2611 * host is offlined by SCSI. 2612 * 2613 */ 2614 int fnic_host_reset(struct scsi_cmnd *sc) 2615 { 2616 int ret; 2617 unsigned long wait_host_tmo; 2618 struct Scsi_Host *shost = sc->device->host; 2619 struct fc_lport *lp = shost_priv(shost); 2620 struct fnic *fnic = lport_priv(lp); 2621 unsigned long flags; 2622 2623 spin_lock_irqsave(&fnic->fnic_lock, flags); 2624 if (fnic->internal_reset_inprogress == 0) { 2625 fnic->internal_reset_inprogress = 1; 2626 } else { 2627 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2628 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2629 "host reset in progress skipping another host reset\n"); 2630 return SUCCESS; 2631 } 2632 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2633 2634 /* 2635 * If fnic_reset is successful, wait for fabric login to complete 2636 * scsi-ml tries to send a TUR to every device if host reset is 2637 * successful, so before returning to scsi, fabric should be up 2638 */ 2639 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2640 if (ret == SUCCESS) { 2641 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2642 ret = FAILED; 2643 while (time_before(jiffies, wait_host_tmo)) { 2644 if ((lp->state == LPORT_ST_READY) && 2645 (lp->link_up)) { 2646 ret = SUCCESS; 2647 break; 2648 } 2649 ssleep(1); 2650 } 2651 } 2652 2653 spin_lock_irqsave(&fnic->fnic_lock, flags); 2654 fnic->internal_reset_inprogress = 0; 2655 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2656 return ret; 2657 } 2658 2659 /* 2660 * This fxn is called from libFC when host is removed 2661 */ 2662 void fnic_scsi_abort_io(struct fc_lport *lp) 2663 { 2664 int err = 0; 2665 unsigned long flags; 2666 enum fnic_state old_state; 2667 struct fnic *fnic = lport_priv(lp); 2668 DECLARE_COMPLETION_ONSTACK(remove_wait); 2669 2670 /* Issue firmware reset for fnic, wait for reset to complete */ 2671 retry_fw_reset: 2672 spin_lock_irqsave(&fnic->fnic_lock, flags); 2673 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2674 /* fw reset is in progress, poll for its completion */ 2675 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2676 schedule_timeout(msecs_to_jiffies(100)); 2677 goto retry_fw_reset; 2678 } 2679 2680 fnic->remove_wait = &remove_wait; 2681 old_state = fnic->state; 2682 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2683 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2684 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2685 2686 err = fnic_fw_reset_handler(fnic); 2687 if (err) { 2688 spin_lock_irqsave(&fnic->fnic_lock, flags); 2689 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2690 fnic->state = old_state; 2691 fnic->remove_wait = NULL; 2692 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2693 return; 2694 } 2695 2696 /* Wait for firmware reset to complete */ 2697 wait_for_completion_timeout(&remove_wait, 2698 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2699 2700 spin_lock_irqsave(&fnic->fnic_lock, flags); 2701 fnic->remove_wait = NULL; 2702 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2703 "fnic_scsi_abort_io %s\n", 2704 (fnic->state == FNIC_IN_ETH_MODE) ? 2705 "SUCCESS" : "FAILED"); 2706 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2707 2708 } 2709 2710 /* 2711 * This fxn called from libFC to clean up driver IO state on link down 2712 */ 2713 void fnic_scsi_cleanup(struct fc_lport *lp) 2714 { 2715 unsigned long flags; 2716 enum fnic_state old_state; 2717 struct fnic *fnic = lport_priv(lp); 2718 2719 /* issue fw reset */ 2720 retry_fw_reset: 2721 spin_lock_irqsave(&fnic->fnic_lock, flags); 2722 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2723 /* fw reset is in progress, poll for its completion */ 2724 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2725 schedule_timeout(msecs_to_jiffies(100)); 2726 goto retry_fw_reset; 2727 } 2728 old_state = fnic->state; 2729 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2730 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2731 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2732 2733 if (fnic_fw_reset_handler(fnic)) { 2734 spin_lock_irqsave(&fnic->fnic_lock, flags); 2735 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2736 fnic->state = old_state; 2737 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2738 } 2739 2740 } 2741 2742 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2743 { 2744 } 2745 2746 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2747 { 2748 struct fnic *fnic = lport_priv(lp); 2749 2750 /* Non-zero sid, nothing to do */ 2751 if (sid) 2752 goto call_fc_exch_mgr_reset; 2753 2754 if (did) { 2755 fnic_rport_exch_reset(fnic, did); 2756 goto call_fc_exch_mgr_reset; 2757 } 2758 2759 /* 2760 * sid = 0, did = 0 2761 * link down or device being removed 2762 */ 2763 if (!fnic->in_remove) 2764 fnic_scsi_cleanup(lp); 2765 else 2766 fnic_scsi_abort_io(lp); 2767 2768 /* call libFC exch mgr reset to reset its exchanges */ 2769 call_fc_exch_mgr_reset: 2770 fc_exch_mgr_reset(lp, sid, did); 2771 2772 } 2773 2774 /* 2775 * fnic_is_abts_pending() is a helper function that 2776 * walks through tag map to check if there is any IOs pending,if there is one, 2777 * then it returns 1 (true), otherwise 0 (false) 2778 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2779 * otherwise, it checks for all IOs. 2780 */ 2781 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2782 { 2783 int tag; 2784 struct fnic_io_req *io_req; 2785 spinlock_t *io_lock; 2786 unsigned long flags; 2787 int ret = 0; 2788 struct scsi_cmnd *sc; 2789 struct scsi_device *lun_dev = NULL; 2790 2791 if (lr_sc) 2792 lun_dev = lr_sc->device; 2793 2794 /* walk again to check, if IOs are still pending in fw */ 2795 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2796 sc = scsi_host_find_tag(fnic->lport->host, tag); 2797 /* 2798 * ignore this lun reset cmd or cmds that do not belong to 2799 * this lun 2800 */ 2801 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) 2802 continue; 2803 2804 io_lock = fnic_io_lock_hash(fnic, sc); 2805 spin_lock_irqsave(io_lock, flags); 2806 2807 io_req = (struct fnic_io_req *)CMD_SP(sc); 2808 2809 if (!io_req || sc->device != lun_dev) { 2810 spin_unlock_irqrestore(io_lock, flags); 2811 continue; 2812 } 2813 2814 /* 2815 * Found IO that is still pending with firmware and 2816 * belongs to the LUN that we are resetting 2817 */ 2818 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2819 "Found IO in %s on lun\n", 2820 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2821 2822 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2823 ret = 1; 2824 spin_unlock_irqrestore(io_lock, flags); 2825 } 2826 2827 return ret; 2828 } 2829