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