1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 4 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 5 */ 6 #include <linux/mempool.h> 7 #include <linux/errno.h> 8 #include <linux/init.h> 9 #include <linux/workqueue.h> 10 #include <linux/pci.h> 11 #include <linux/scatterlist.h> 12 #include <linux/skbuff.h> 13 #include <linux/spinlock.h> 14 #include <linux/etherdevice.h> 15 #include <linux/if_ether.h> 16 #include <linux/if_vlan.h> 17 #include <linux/delay.h> 18 #include <linux/gfp.h> 19 #include <scsi/scsi.h> 20 #include <scsi/scsi_host.h> 21 #include <scsi/scsi_device.h> 22 #include <scsi/scsi_cmnd.h> 23 #include <scsi/scsi_tcq.h> 24 #include <scsi/fc/fc_els.h> 25 #include <scsi/fc/fc_fcoe.h> 26 #include <scsi/libfc.h> 27 #include <scsi/fc_frame.h> 28 #include "fnic_io.h" 29 #include "fnic.h" 30 31 const char *fnic_state_str[] = { 32 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE", 33 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE", 34 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE", 35 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE", 36 }; 37 38 static const char *fnic_ioreq_state_str[] = { 39 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED", 40 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING", 41 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING", 42 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE", 43 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE", 44 }; 45 46 static const char *fcpio_status_str[] = { 47 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/ 48 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER", 49 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE", 50 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]", 51 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED", 52 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND", 53 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/ 54 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT", 55 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID", 56 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID", 57 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH", 58 [FCPIO_FW_ERR] = "FCPIO_FW_ERR", 59 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED", 60 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED", 61 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN", 62 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED", 63 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL", 64 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED", 65 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", 66 }; 67 68 const char *fnic_state_to_str(unsigned int state) 69 { 70 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) 71 return "unknown"; 72 73 return fnic_state_str[state]; 74 } 75 76 static const char *fnic_ioreq_state_to_str(unsigned int state) 77 { 78 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) || 79 !fnic_ioreq_state_str[state]) 80 return "unknown"; 81 82 return fnic_ioreq_state_str[state]; 83 } 84 85 static const char *fnic_fcpio_status_to_str(unsigned int status) 86 { 87 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status]) 88 return "unknown"; 89 90 return fcpio_status_str[status]; 91 } 92 93 static void fnic_cleanup_io(struct fnic *fnic); 94 95 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic, 96 struct scsi_cmnd *sc) 97 { 98 u32 hash = scsi_cmd_to_rq(sc)->tag & (FNIC_IO_LOCKS - 1); 99 100 return &fnic->io_req_lock[hash]; 101 } 102 103 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic, 104 int tag) 105 { 106 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)]; 107 } 108 109 /* 110 * Unmap the data buffer and sense buffer for an io_req, 111 * also unmap and free the device-private scatter/gather list. 112 */ 113 static void fnic_release_ioreq_buf(struct fnic *fnic, 114 struct fnic_io_req *io_req, 115 struct scsi_cmnd *sc) 116 { 117 if (io_req->sgl_list_pa) 118 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 119 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, 120 DMA_TO_DEVICE); 121 scsi_dma_unmap(sc); 122 123 if (io_req->sgl_cnt) 124 mempool_free(io_req->sgl_list_alloc, 125 fnic->io_sgl_pool[io_req->sgl_type]); 126 if (io_req->sense_buf_pa) 127 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa, 128 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); 129 } 130 131 /* Free up Copy Wq descriptors. Called with copy_wq lock held */ 132 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq) 133 { 134 /* if no Ack received from firmware, then nothing to clean */ 135 if (!fnic->fw_ack_recd[0]) 136 return 1; 137 138 /* 139 * Update desc_available count based on number of freed descriptors 140 * Account for wraparound 141 */ 142 if (wq->to_clean_index <= fnic->fw_ack_index[0]) 143 wq->ring.desc_avail += (fnic->fw_ack_index[0] 144 - wq->to_clean_index + 1); 145 else 146 wq->ring.desc_avail += (wq->ring.desc_count 147 - wq->to_clean_index 148 + fnic->fw_ack_index[0] + 1); 149 150 /* 151 * just bump clean index to ack_index+1 accounting for wraparound 152 * this will essentially free up all descriptors between 153 * to_clean_index and fw_ack_index, both inclusive 154 */ 155 wq->to_clean_index = 156 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count; 157 158 /* we have processed the acks received so far */ 159 fnic->fw_ack_recd[0] = 0; 160 return 0; 161 } 162 163 164 /* 165 * __fnic_set_state_flags 166 * Sets/Clears bits in fnic's state_flags 167 **/ 168 void 169 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags, 170 unsigned long clearbits) 171 { 172 unsigned long flags = 0; 173 unsigned long host_lock_flags = 0; 174 175 spin_lock_irqsave(&fnic->fnic_lock, flags); 176 spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags); 177 178 if (clearbits) 179 fnic->state_flags &= ~st_flags; 180 else 181 fnic->state_flags |= st_flags; 182 183 spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags); 184 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 185 186 return; 187 } 188 189 190 /* 191 * fnic_fw_reset_handler 192 * Routine to send reset msg to fw 193 */ 194 int fnic_fw_reset_handler(struct fnic *fnic) 195 { 196 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 197 int ret = 0; 198 unsigned long flags; 199 200 /* indicate fwreset to io path */ 201 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); 202 203 skb_queue_purge(&fnic->frame_queue); 204 skb_queue_purge(&fnic->tx_queue); 205 206 /* wait for io cmpl */ 207 while (atomic_read(&fnic->in_flight)) 208 schedule_timeout(msecs_to_jiffies(1)); 209 210 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 211 212 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 213 free_wq_copy_descs(fnic, wq); 214 215 if (!vnic_wq_copy_desc_avail(wq)) 216 ret = -EAGAIN; 217 else { 218 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); 219 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 220 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 221 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 222 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 223 atomic64_read( 224 &fnic->fnic_stats.fw_stats.active_fw_reqs)); 225 } 226 227 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 228 229 if (!ret) { 230 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets); 231 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 232 "Issued fw reset\n"); 233 } else { 234 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 235 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 236 "Failed to issue fw reset\n"); 237 } 238 239 return ret; 240 } 241 242 243 /* 244 * fnic_flogi_reg_handler 245 * Routine to send flogi register msg to fw 246 */ 247 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) 248 { 249 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 250 enum fcpio_flogi_reg_format_type format; 251 struct fc_lport *lp = fnic->lport; 252 u8 gw_mac[ETH_ALEN]; 253 int ret = 0; 254 unsigned long flags; 255 256 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 257 258 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 259 free_wq_copy_descs(fnic, wq); 260 261 if (!vnic_wq_copy_desc_avail(wq)) { 262 ret = -EAGAIN; 263 goto flogi_reg_ioreq_end; 264 } 265 266 if (fnic->ctlr.map_dest) { 267 eth_broadcast_addr(gw_mac); 268 format = FCPIO_FLOGI_REG_DEF_DEST; 269 } else { 270 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); 271 format = FCPIO_FLOGI_REG_GW_DEST; 272 } 273 274 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { 275 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, 276 fc_id, gw_mac, 277 fnic->data_src_addr, 278 lp->r_a_tov, lp->e_d_tov); 279 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 280 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", 281 fc_id, fnic->data_src_addr, gw_mac); 282 } else { 283 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, 284 format, fc_id, gw_mac); 285 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 286 "FLOGI reg issued fcid %x map %d dest %pM\n", 287 fc_id, fnic->ctlr.map_dest, gw_mac); 288 } 289 290 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 291 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 292 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 293 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 294 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 295 296 flogi_reg_ioreq_end: 297 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 298 return ret; 299 } 300 301 /* 302 * fnic_queue_wq_copy_desc 303 * Routine to enqueue a wq copy desc 304 */ 305 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, 306 struct vnic_wq_copy *wq, 307 struct fnic_io_req *io_req, 308 struct scsi_cmnd *sc, 309 int sg_count) 310 { 311 struct scatterlist *sg; 312 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); 313 struct fc_rport_libfc_priv *rp = rport->dd_data; 314 struct host_sg_desc *desc; 315 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 316 unsigned int i; 317 unsigned long intr_flags; 318 int flags; 319 u8 exch_flags; 320 struct scsi_lun fc_lun; 321 322 if (sg_count) { 323 /* For each SGE, create a device desc entry */ 324 desc = io_req->sgl_list; 325 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 326 desc->addr = cpu_to_le64(sg_dma_address(sg)); 327 desc->len = cpu_to_le32(sg_dma_len(sg)); 328 desc->_resvd = 0; 329 desc++; 330 } 331 332 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev, 333 io_req->sgl_list, 334 sizeof(io_req->sgl_list[0]) * sg_count, 335 DMA_TO_DEVICE); 336 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) { 337 printk(KERN_ERR "DMA mapping failed\n"); 338 return SCSI_MLQUEUE_HOST_BUSY; 339 } 340 } 341 342 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev, 343 sc->sense_buffer, 344 SCSI_SENSE_BUFFERSIZE, 345 DMA_FROM_DEVICE); 346 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) { 347 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 348 sizeof(io_req->sgl_list[0]) * sg_count, 349 DMA_TO_DEVICE); 350 printk(KERN_ERR "DMA mapping failed\n"); 351 return SCSI_MLQUEUE_HOST_BUSY; 352 } 353 354 int_to_scsilun(sc->device->lun, &fc_lun); 355 356 /* Enqueue the descriptor in the Copy WQ */ 357 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 358 359 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 360 free_wq_copy_descs(fnic, wq); 361 362 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 363 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 364 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 365 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 366 atomic64_inc(&misc_stats->io_cpwq_alloc_failures); 367 return SCSI_MLQUEUE_HOST_BUSY; 368 } 369 370 flags = 0; 371 if (sc->sc_data_direction == DMA_FROM_DEVICE) 372 flags = FCPIO_ICMND_RDDATA; 373 else if (sc->sc_data_direction == DMA_TO_DEVICE) 374 flags = FCPIO_ICMND_WRDATA; 375 376 exch_flags = 0; 377 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 378 (rp->flags & FC_RP_FLAGS_RETRY)) 379 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 380 381 fnic_queue_wq_copy_desc_icmnd_16(wq, scsi_cmd_to_rq(sc)->tag, 382 0, exch_flags, io_req->sgl_cnt, 383 SCSI_SENSE_BUFFERSIZE, 384 io_req->sgl_list_pa, 385 io_req->sense_buf_pa, 386 0, /* scsi cmd ref, always 0 */ 387 FCPIO_ICMND_PTA_SIMPLE, 388 /* scsi pri and tag */ 389 flags, /* command flags */ 390 sc->cmnd, sc->cmd_len, 391 scsi_bufflen(sc), 392 fc_lun.scsi_lun, io_req->port_id, 393 rport->maxframe_size, rp->r_a_tov, 394 rp->e_d_tov); 395 396 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 397 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 398 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 399 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 400 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 401 402 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 403 return 0; 404 } 405 406 /* 407 * fnic_queuecommand 408 * Routine to send a scsi cdb 409 * Called with host_lock held and interrupts disabled. 410 */ 411 static int fnic_queuecommand_lck(struct scsi_cmnd *sc) 412 { 413 void (*done)(struct scsi_cmnd *) = scsi_done; 414 const int tag = scsi_cmd_to_rq(sc)->tag; 415 struct fc_lport *lp = shost_priv(sc->device->host); 416 struct fc_rport *rport; 417 struct fnic_io_req *io_req = NULL; 418 struct fnic *fnic = lport_priv(lp); 419 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 420 struct vnic_wq_copy *wq; 421 int ret; 422 u64 cmd_trace; 423 int sg_count = 0; 424 unsigned long flags = 0; 425 unsigned long ptr; 426 spinlock_t *io_lock = NULL; 427 int io_lock_acquired = 0; 428 struct fc_rport_libfc_priv *rp; 429 430 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 431 return SCSI_MLQUEUE_HOST_BUSY; 432 433 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) 434 return SCSI_MLQUEUE_HOST_BUSY; 435 436 rport = starget_to_rport(scsi_target(sc->device)); 437 if (!rport) { 438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 439 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 440 sc->result = DID_NO_CONNECT << 16; 441 done(sc); 442 return 0; 443 } 444 445 ret = fc_remote_port_chkready(rport); 446 if (ret) { 447 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 448 "rport is not ready\n"); 449 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 450 sc->result = ret; 451 done(sc); 452 return 0; 453 } 454 455 rp = rport->dd_data; 456 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 457 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 458 "rport 0x%x removed, returning DID_NO_CONNECT\n", 459 rport->port_id); 460 461 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 462 sc->result = DID_NO_CONNECT<<16; 463 done(sc); 464 return 0; 465 } 466 467 if (rp->rp_state != RPORT_ST_READY) { 468 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 469 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 470 rport->port_id, rp->rp_state); 471 472 sc->result = DID_IMM_RETRY << 16; 473 done(sc); 474 return 0; 475 } 476 477 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 478 return SCSI_MLQUEUE_HOST_BUSY; 479 480 atomic_inc(&fnic->in_flight); 481 482 /* 483 * Release host lock, use driver resource specific locks from here. 484 * Don't re-enable interrupts in case they were disabled prior to the 485 * caller disabling them. 486 */ 487 spin_unlock(lp->host->host_lock); 488 fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED; 489 fnic_priv(sc)->flags = FNIC_NO_FLAGS; 490 491 /* Get a new io_req for this SCSI IO */ 492 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 493 if (!io_req) { 494 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 495 ret = SCSI_MLQUEUE_HOST_BUSY; 496 goto out; 497 } 498 memset(io_req, 0, sizeof(*io_req)); 499 500 /* Map the data buffer */ 501 sg_count = scsi_dma_map(sc); 502 if (sg_count < 0) { 503 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 504 tag, sc, 0, sc->cmnd[0], sg_count, fnic_priv(sc)->state); 505 mempool_free(io_req, fnic->io_req_pool); 506 goto out; 507 } 508 509 /* Determine the type of scatter/gather list we need */ 510 io_req->sgl_cnt = sg_count; 511 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 512 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 513 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 514 515 if (sg_count) { 516 io_req->sgl_list = 517 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 518 GFP_ATOMIC); 519 if (!io_req->sgl_list) { 520 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 521 ret = SCSI_MLQUEUE_HOST_BUSY; 522 scsi_dma_unmap(sc); 523 mempool_free(io_req, fnic->io_req_pool); 524 goto out; 525 } 526 527 /* Cache sgl list allocated address before alignment */ 528 io_req->sgl_list_alloc = io_req->sgl_list; 529 ptr = (unsigned long) io_req->sgl_list; 530 if (ptr % FNIC_SG_DESC_ALIGN) { 531 io_req->sgl_list = (struct host_sg_desc *) 532 (((unsigned long) ptr 533 + FNIC_SG_DESC_ALIGN - 1) 534 & ~(FNIC_SG_DESC_ALIGN - 1)); 535 } 536 } 537 538 /* 539 * Will acquire lock defore setting to IO initialized. 540 */ 541 542 io_lock = fnic_io_lock_hash(fnic, sc); 543 spin_lock_irqsave(io_lock, flags); 544 545 /* initialize rest of io_req */ 546 io_lock_acquired = 1; 547 io_req->port_id = rport->port_id; 548 io_req->start_time = jiffies; 549 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING; 550 fnic_priv(sc)->io_req = io_req; 551 fnic_priv(sc)->flags |= FNIC_IO_INITIALIZED; 552 553 /* create copy wq desc and enqueue it */ 554 wq = &fnic->wq_copy[0]; 555 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 556 if (ret) { 557 /* 558 * In case another thread cancelled the request, 559 * refetch the pointer under the lock. 560 */ 561 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 562 tag, sc, 0, 0, 0, fnic_flags_and_state(sc)); 563 io_req = fnic_priv(sc)->io_req; 564 fnic_priv(sc)->io_req = NULL; 565 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 566 spin_unlock_irqrestore(io_lock, flags); 567 if (io_req) { 568 fnic_release_ioreq_buf(fnic, io_req, sc); 569 mempool_free(io_req, fnic->io_req_pool); 570 } 571 atomic_dec(&fnic->in_flight); 572 /* acquire host lock before returning to SCSI */ 573 spin_lock(lp->host->host_lock); 574 return ret; 575 } else { 576 atomic64_inc(&fnic_stats->io_stats.active_ios); 577 atomic64_inc(&fnic_stats->io_stats.num_ios); 578 if (atomic64_read(&fnic_stats->io_stats.active_ios) > 579 atomic64_read(&fnic_stats->io_stats.max_active_ios)) 580 atomic64_set(&fnic_stats->io_stats.max_active_ios, 581 atomic64_read(&fnic_stats->io_stats.active_ios)); 582 583 /* REVISIT: Use per IO lock in the final code */ 584 fnic_priv(sc)->flags |= FNIC_IO_ISSUED; 585 } 586 out: 587 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 588 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 589 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 590 sc->cmnd[5]); 591 592 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 593 tag, sc, io_req, sg_count, cmd_trace, 594 fnic_flags_and_state(sc)); 595 596 /* if only we issued IO, will we have the io lock */ 597 if (io_lock_acquired) 598 spin_unlock_irqrestore(io_lock, flags); 599 600 atomic_dec(&fnic->in_flight); 601 /* acquire host lock before returning to SCSI */ 602 spin_lock(lp->host->host_lock); 603 return ret; 604 } 605 606 DEF_SCSI_QCMD(fnic_queuecommand) 607 608 /* 609 * fnic_fcpio_fw_reset_cmpl_handler 610 * Routine to handle fw reset completion 611 */ 612 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 613 struct fcpio_fw_req *desc) 614 { 615 u8 type; 616 u8 hdr_status; 617 struct fcpio_tag tag; 618 int ret = 0; 619 unsigned long flags; 620 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 621 622 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 623 624 atomic64_inc(&reset_stats->fw_reset_completions); 625 626 /* Clean up all outstanding io requests */ 627 fnic_cleanup_io(fnic); 628 629 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 630 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 631 atomic64_set(&fnic->io_cmpl_skip, 0); 632 633 spin_lock_irqsave(&fnic->fnic_lock, flags); 634 635 /* fnic should be in FC_TRANS_ETH_MODE */ 636 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 637 /* Check status of reset completion */ 638 if (!hdr_status) { 639 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 640 "reset cmpl success\n"); 641 /* Ready to send flogi out */ 642 fnic->state = FNIC_IN_ETH_MODE; 643 } else { 644 FNIC_SCSI_DBG(KERN_DEBUG, 645 fnic->lport->host, 646 "fnic fw_reset : failed %s\n", 647 fnic_fcpio_status_to_str(hdr_status)); 648 649 /* 650 * Unable to change to eth mode, cannot send out flogi 651 * Change state to fc mode, so that subsequent Flogi 652 * requests from libFC will cause more attempts to 653 * reset the firmware. Free the cached flogi 654 */ 655 fnic->state = FNIC_IN_FC_MODE; 656 atomic64_inc(&reset_stats->fw_reset_failures); 657 ret = -1; 658 } 659 } else { 660 FNIC_SCSI_DBG(KERN_DEBUG, 661 fnic->lport->host, 662 "Unexpected state %s while processing" 663 " reset cmpl\n", fnic_state_to_str(fnic->state)); 664 atomic64_inc(&reset_stats->fw_reset_failures); 665 ret = -1; 666 } 667 668 /* Thread removing device blocks till firmware reset is complete */ 669 if (fnic->remove_wait) 670 complete(fnic->remove_wait); 671 672 /* 673 * If fnic is being removed, or fw reset failed 674 * free the flogi frame. Else, send it out 675 */ 676 if (fnic->remove_wait || ret) { 677 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 678 skb_queue_purge(&fnic->tx_queue); 679 goto reset_cmpl_handler_end; 680 } 681 682 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 683 684 fnic_flush_tx(fnic); 685 686 reset_cmpl_handler_end: 687 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 688 689 return ret; 690 } 691 692 /* 693 * fnic_fcpio_flogi_reg_cmpl_handler 694 * Routine to handle flogi register completion 695 */ 696 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 697 struct fcpio_fw_req *desc) 698 { 699 u8 type; 700 u8 hdr_status; 701 struct fcpio_tag tag; 702 int ret = 0; 703 unsigned long flags; 704 705 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 706 707 /* Update fnic state based on status of flogi reg completion */ 708 spin_lock_irqsave(&fnic->fnic_lock, flags); 709 710 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 711 712 /* Check flogi registration completion status */ 713 if (!hdr_status) { 714 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 715 "flog reg succeeded\n"); 716 fnic->state = FNIC_IN_FC_MODE; 717 } else { 718 FNIC_SCSI_DBG(KERN_DEBUG, 719 fnic->lport->host, 720 "fnic flogi reg :failed %s\n", 721 fnic_fcpio_status_to_str(hdr_status)); 722 fnic->state = FNIC_IN_ETH_MODE; 723 ret = -1; 724 } 725 } else { 726 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 727 "Unexpected fnic state %s while" 728 " processing flogi reg completion\n", 729 fnic_state_to_str(fnic->state)); 730 ret = -1; 731 } 732 733 if (!ret) { 734 if (fnic->stop_rx_link_events) { 735 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 736 goto reg_cmpl_handler_end; 737 } 738 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 739 740 fnic_flush_tx(fnic); 741 queue_work(fnic_event_queue, &fnic->frame_work); 742 } else { 743 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 744 } 745 746 reg_cmpl_handler_end: 747 return ret; 748 } 749 750 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 751 u16 request_out) 752 { 753 if (wq->to_clean_index <= wq->to_use_index) { 754 /* out of range, stale request_out index */ 755 if (request_out < wq->to_clean_index || 756 request_out >= wq->to_use_index) 757 return 0; 758 } else { 759 /* out of range, stale request_out index */ 760 if (request_out < wq->to_clean_index && 761 request_out >= wq->to_use_index) 762 return 0; 763 } 764 /* request_out index is in range */ 765 return 1; 766 } 767 768 769 /* 770 * Mark that ack received and store the Ack index. If there are multiple 771 * acks received before Tx thread cleans it up, the latest value will be 772 * used which is correct behavior. This state should be in the copy Wq 773 * instead of in the fnic 774 */ 775 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 776 unsigned int cq_index, 777 struct fcpio_fw_req *desc) 778 { 779 struct vnic_wq_copy *wq; 780 u16 request_out = desc->u.ack.request_out; 781 unsigned long flags; 782 u64 *ox_id_tag = (u64 *)(void *)desc; 783 784 /* mark the ack state */ 785 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 786 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 787 788 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 789 if (is_ack_index_in_range(wq, request_out)) { 790 fnic->fw_ack_index[0] = request_out; 791 fnic->fw_ack_recd[0] = 1; 792 } else 793 atomic64_inc( 794 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 795 796 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 797 FNIC_TRACE(fnic_fcpio_ack_handler, 798 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 799 ox_id_tag[4], ox_id_tag[5]); 800 } 801 802 /* 803 * fnic_fcpio_icmnd_cmpl_handler 804 * Routine to handle icmnd completions 805 */ 806 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 807 struct fcpio_fw_req *desc) 808 { 809 u8 type; 810 u8 hdr_status; 811 struct fcpio_tag tag; 812 u32 id; 813 u64 xfer_len = 0; 814 struct fcpio_icmnd_cmpl *icmnd_cmpl; 815 struct fnic_io_req *io_req; 816 struct scsi_cmnd *sc; 817 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 818 unsigned long flags; 819 spinlock_t *io_lock; 820 u64 cmd_trace; 821 unsigned long start_time; 822 unsigned long io_duration_time; 823 824 /* Decode the cmpl description to get the io_req id */ 825 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 826 fcpio_tag_id_dec(&tag, &id); 827 icmnd_cmpl = &desc->u.icmnd_cmpl; 828 829 if (id >= fnic->fnic_max_tag_id) { 830 shost_printk(KERN_ERR, fnic->lport->host, 831 "Tag out of range tag %x hdr status = %s\n", 832 id, fnic_fcpio_status_to_str(hdr_status)); 833 return; 834 } 835 836 sc = scsi_host_find_tag(fnic->lport->host, id); 837 WARN_ON_ONCE(!sc); 838 if (!sc) { 839 atomic64_inc(&fnic_stats->io_stats.sc_null); 840 shost_printk(KERN_ERR, fnic->lport->host, 841 "icmnd_cmpl sc is null - " 842 "hdr status = %s tag = 0x%x desc = 0x%p\n", 843 fnic_fcpio_status_to_str(hdr_status), id, desc); 844 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 845 fnic->lport->host->host_no, id, 846 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 847 (u64)icmnd_cmpl->_resvd0[0]), 848 ((u64)hdr_status << 16 | 849 (u64)icmnd_cmpl->scsi_status << 8 | 850 (u64)icmnd_cmpl->flags), desc, 851 (u64)icmnd_cmpl->residual, 0); 852 return; 853 } 854 855 io_lock = fnic_io_lock_hash(fnic, sc); 856 spin_lock_irqsave(io_lock, flags); 857 io_req = fnic_priv(sc)->io_req; 858 WARN_ON_ONCE(!io_req); 859 if (!io_req) { 860 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 861 fnic_priv(sc)->flags |= FNIC_IO_REQ_NULL; 862 spin_unlock_irqrestore(io_lock, flags); 863 shost_printk(KERN_ERR, fnic->lport->host, 864 "icmnd_cmpl io_req is null - " 865 "hdr status = %s tag = 0x%x sc 0x%p\n", 866 fnic_fcpio_status_to_str(hdr_status), id, sc); 867 return; 868 } 869 start_time = io_req->start_time; 870 871 /* firmware completed the io */ 872 io_req->io_completed = 1; 873 874 /* 875 * if SCSI-ML has already issued abort on this command, 876 * set completion of the IO. The abts path will clean it up 877 */ 878 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 879 880 /* 881 * set the FNIC_IO_DONE so that this doesn't get 882 * flagged as 'out of order' if it was not aborted 883 */ 884 fnic_priv(sc)->flags |= FNIC_IO_DONE; 885 fnic_priv(sc)->flags |= FNIC_IO_ABTS_PENDING; 886 spin_unlock_irqrestore(io_lock, flags); 887 if(FCPIO_ABORTED == hdr_status) 888 fnic_priv(sc)->flags |= FNIC_IO_ABORTED; 889 890 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 891 "icmnd_cmpl abts pending " 892 "hdr status = %s tag = 0x%x sc = 0x%p " 893 "scsi_status = %x residual = %d\n", 894 fnic_fcpio_status_to_str(hdr_status), 895 id, sc, 896 icmnd_cmpl->scsi_status, 897 icmnd_cmpl->residual); 898 return; 899 } 900 901 /* Mark the IO as complete */ 902 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 903 904 icmnd_cmpl = &desc->u.icmnd_cmpl; 905 906 switch (hdr_status) { 907 case FCPIO_SUCCESS: 908 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 909 xfer_len = scsi_bufflen(sc); 910 911 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) { 912 xfer_len -= icmnd_cmpl->residual; 913 scsi_set_resid(sc, icmnd_cmpl->residual); 914 } 915 916 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) 917 atomic64_inc(&fnic_stats->misc_stats.check_condition); 918 919 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 920 atomic64_inc(&fnic_stats->misc_stats.queue_fulls); 921 break; 922 923 case FCPIO_TIMEOUT: /* request was timed out */ 924 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); 925 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 926 break; 927 928 case FCPIO_ABORTED: /* request was aborted */ 929 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); 930 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 931 break; 932 933 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 934 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); 935 scsi_set_resid(sc, icmnd_cmpl->residual); 936 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 937 break; 938 939 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 940 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); 941 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 942 break; 943 944 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 945 atomic64_inc(&fnic_stats->io_stats.io_not_found); 946 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 947 break; 948 949 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 950 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); 951 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 952 break; 953 954 case FCPIO_FW_ERR: /* request was terminated due fw error */ 955 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); 956 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 957 break; 958 959 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 960 atomic64_inc(&fnic_stats->misc_stats.mss_invalid); 961 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 962 break; 963 964 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 965 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 966 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 967 default: 968 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 969 break; 970 } 971 972 /* Break link with the SCSI command */ 973 fnic_priv(sc)->io_req = NULL; 974 fnic_priv(sc)->flags |= FNIC_IO_DONE; 975 976 if (hdr_status != FCPIO_SUCCESS) { 977 atomic64_inc(&fnic_stats->io_stats.io_failures); 978 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 979 fnic_fcpio_status_to_str(hdr_status)); 980 } 981 982 fnic_release_ioreq_buf(fnic, io_req, sc); 983 984 cmd_trace = ((u64)hdr_status << 56) | 985 (u64)icmnd_cmpl->scsi_status << 48 | 986 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 987 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 988 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 989 990 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 991 sc->device->host->host_no, id, sc, 992 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 993 (u64)icmnd_cmpl->_resvd0[0] << 48 | 994 jiffies_to_msecs(jiffies - start_time)), 995 desc, cmd_trace, fnic_flags_and_state(sc)); 996 997 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 998 fnic->lport->host_stats.fcp_input_requests++; 999 fnic->fcp_input_bytes += xfer_len; 1000 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1001 fnic->lport->host_stats.fcp_output_requests++; 1002 fnic->fcp_output_bytes += xfer_len; 1003 } else 1004 fnic->lport->host_stats.fcp_control_requests++; 1005 1006 /* Call SCSI completion function to complete the IO */ 1007 scsi_done(sc); 1008 spin_unlock_irqrestore(io_lock, flags); 1009 1010 mempool_free(io_req, fnic->io_req_pool); 1011 1012 atomic64_dec(&fnic_stats->io_stats.active_ios); 1013 if (atomic64_read(&fnic->io_cmpl_skip)) 1014 atomic64_dec(&fnic->io_cmpl_skip); 1015 else 1016 atomic64_inc(&fnic_stats->io_stats.io_completions); 1017 1018 1019 io_duration_time = jiffies_to_msecs(jiffies) - 1020 jiffies_to_msecs(start_time); 1021 1022 if(io_duration_time <= 10) 1023 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1024 else if(io_duration_time <= 100) 1025 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1026 else if(io_duration_time <= 500) 1027 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1028 else if(io_duration_time <= 5000) 1029 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1030 else if(io_duration_time <= 10000) 1031 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1032 else if(io_duration_time <= 30000) 1033 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1034 else { 1035 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1036 1037 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1038 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1039 } 1040 } 1041 1042 /* fnic_fcpio_itmf_cmpl_handler 1043 * Routine to handle itmf completions 1044 */ 1045 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1046 struct fcpio_fw_req *desc) 1047 { 1048 u8 type; 1049 u8 hdr_status; 1050 struct fcpio_tag tag; 1051 u32 id; 1052 struct scsi_cmnd *sc; 1053 struct fnic_io_req *io_req; 1054 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1055 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1056 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1057 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1058 unsigned long flags; 1059 spinlock_t *io_lock; 1060 unsigned long start_time; 1061 1062 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1063 fcpio_tag_id_dec(&tag, &id); 1064 1065 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1066 shost_printk(KERN_ERR, fnic->lport->host, 1067 "Tag out of range tag %x hdr status = %s\n", 1068 id, fnic_fcpio_status_to_str(hdr_status)); 1069 return; 1070 } 1071 1072 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1073 WARN_ON_ONCE(!sc); 1074 if (!sc) { 1075 atomic64_inc(&fnic_stats->io_stats.sc_null); 1076 shost_printk(KERN_ERR, fnic->lport->host, 1077 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1078 fnic_fcpio_status_to_str(hdr_status), id); 1079 return; 1080 } 1081 io_lock = fnic_io_lock_hash(fnic, sc); 1082 spin_lock_irqsave(io_lock, flags); 1083 io_req = fnic_priv(sc)->io_req; 1084 WARN_ON_ONCE(!io_req); 1085 if (!io_req) { 1086 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1087 spin_unlock_irqrestore(io_lock, flags); 1088 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 1089 shost_printk(KERN_ERR, fnic->lport->host, 1090 "itmf_cmpl io_req is null - " 1091 "hdr status = %s tag = 0x%x sc 0x%p\n", 1092 fnic_fcpio_status_to_str(hdr_status), id, sc); 1093 return; 1094 } 1095 start_time = io_req->start_time; 1096 1097 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1098 /* Abort and terminate completion of device reset req */ 1099 /* REVISIT : Add asserts about various flags */ 1100 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1101 "dev reset abts cmpl recd. id %x status %s\n", 1102 id, fnic_fcpio_status_to_str(hdr_status)); 1103 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 1104 fnic_priv(sc)->abts_status = hdr_status; 1105 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1106 if (io_req->abts_done) 1107 complete(io_req->abts_done); 1108 spin_unlock_irqrestore(io_lock, flags); 1109 } else if (id & FNIC_TAG_ABORT) { 1110 /* Completion of abort cmd */ 1111 switch (hdr_status) { 1112 case FCPIO_SUCCESS: 1113 break; 1114 case FCPIO_TIMEOUT: 1115 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1116 atomic64_inc(&abts_stats->abort_fw_timeouts); 1117 else 1118 atomic64_inc( 1119 &term_stats->terminate_fw_timeouts); 1120 break; 1121 case FCPIO_ITMF_REJECTED: 1122 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1123 "abort reject recd. id %d\n", 1124 (int)(id & FNIC_TAG_MASK)); 1125 break; 1126 case FCPIO_IO_NOT_FOUND: 1127 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1128 atomic64_inc(&abts_stats->abort_io_not_found); 1129 else 1130 atomic64_inc( 1131 &term_stats->terminate_io_not_found); 1132 break; 1133 default: 1134 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1135 atomic64_inc(&abts_stats->abort_failures); 1136 else 1137 atomic64_inc( 1138 &term_stats->terminate_failures); 1139 break; 1140 } 1141 if (fnic_priv(sc)->state != FNIC_IOREQ_ABTS_PENDING) { 1142 /* This is a late completion. Ignore it */ 1143 spin_unlock_irqrestore(io_lock, flags); 1144 return; 1145 } 1146 1147 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE; 1148 fnic_priv(sc)->abts_status = hdr_status; 1149 1150 /* If the status is IO not found consider it as success */ 1151 if (hdr_status == FCPIO_IO_NOT_FOUND) 1152 fnic_priv(sc)->abts_status = FCPIO_SUCCESS; 1153 1154 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1155 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1156 1157 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1158 "abts cmpl recd. id %d status %s\n", 1159 (int)(id & FNIC_TAG_MASK), 1160 fnic_fcpio_status_to_str(hdr_status)); 1161 1162 /* 1163 * If scsi_eh thread is blocked waiting for abts to complete, 1164 * signal completion to it. IO will be cleaned in the thread 1165 * else clean it in this context 1166 */ 1167 if (io_req->abts_done) { 1168 complete(io_req->abts_done); 1169 spin_unlock_irqrestore(io_lock, flags); 1170 } else { 1171 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1172 "abts cmpl, completing IO\n"); 1173 fnic_priv(sc)->io_req = NULL; 1174 sc->result = (DID_ERROR << 16); 1175 1176 spin_unlock_irqrestore(io_lock, flags); 1177 1178 fnic_release_ioreq_buf(fnic, io_req, sc); 1179 mempool_free(io_req, fnic->io_req_pool); 1180 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1181 sc->device->host->host_no, id, 1182 sc, 1183 jiffies_to_msecs(jiffies - start_time), 1184 desc, 1185 (((u64)hdr_status << 40) | 1186 (u64)sc->cmnd[0] << 32 | 1187 (u64)sc->cmnd[2] << 24 | 1188 (u64)sc->cmnd[3] << 16 | 1189 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1190 fnic_flags_and_state(sc)); 1191 scsi_done(sc); 1192 atomic64_dec(&fnic_stats->io_stats.active_ios); 1193 if (atomic64_read(&fnic->io_cmpl_skip)) 1194 atomic64_dec(&fnic->io_cmpl_skip); 1195 else 1196 atomic64_inc(&fnic_stats->io_stats.io_completions); 1197 } 1198 } else if (id & FNIC_TAG_DEV_RST) { 1199 /* Completion of device reset */ 1200 fnic_priv(sc)->lr_status = hdr_status; 1201 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1202 spin_unlock_irqrestore(io_lock, flags); 1203 fnic_priv(sc)->flags |= FNIC_DEV_RST_ABTS_PENDING; 1204 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1205 sc->device->host->host_no, id, sc, 1206 jiffies_to_msecs(jiffies - start_time), 1207 desc, 0, fnic_flags_and_state(sc)); 1208 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1209 "Terminate pending " 1210 "dev reset cmpl recd. id %d status %s\n", 1211 (int)(id & FNIC_TAG_MASK), 1212 fnic_fcpio_status_to_str(hdr_status)); 1213 return; 1214 } 1215 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TIMED_OUT) { 1216 /* Need to wait for terminate completion */ 1217 spin_unlock_irqrestore(io_lock, flags); 1218 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1219 sc->device->host->host_no, id, sc, 1220 jiffies_to_msecs(jiffies - start_time), 1221 desc, 0, fnic_flags_and_state(sc)); 1222 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1223 "dev reset cmpl recd after time out. " 1224 "id %d status %s\n", 1225 (int)(id & FNIC_TAG_MASK), 1226 fnic_fcpio_status_to_str(hdr_status)); 1227 return; 1228 } 1229 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 1230 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1231 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1232 "dev reset cmpl recd. id %d status %s\n", 1233 (int)(id & FNIC_TAG_MASK), 1234 fnic_fcpio_status_to_str(hdr_status)); 1235 if (io_req->dr_done) 1236 complete(io_req->dr_done); 1237 spin_unlock_irqrestore(io_lock, flags); 1238 1239 } else { 1240 shost_printk(KERN_ERR, fnic->lport->host, 1241 "Unexpected itmf io state %s tag %x\n", 1242 fnic_ioreq_state_to_str(fnic_priv(sc)->state), id); 1243 spin_unlock_irqrestore(io_lock, flags); 1244 } 1245 1246 } 1247 1248 /* 1249 * fnic_fcpio_cmpl_handler 1250 * Routine to service the cq for wq_copy 1251 */ 1252 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1253 unsigned int cq_index, 1254 struct fcpio_fw_req *desc) 1255 { 1256 struct fnic *fnic = vnic_dev_priv(vdev); 1257 1258 switch (desc->hdr.type) { 1259 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1260 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1261 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1262 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1263 case FCPIO_RESET_CMPL: /* fw completed reset */ 1264 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1265 break; 1266 default: 1267 break; 1268 } 1269 1270 switch (desc->hdr.type) { 1271 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1272 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1273 break; 1274 1275 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1276 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1277 break; 1278 1279 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1280 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1281 break; 1282 1283 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1284 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1285 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1286 break; 1287 1288 case FCPIO_RESET_CMPL: /* fw completed reset */ 1289 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1290 break; 1291 1292 default: 1293 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1294 "firmware completion type %d\n", 1295 desc->hdr.type); 1296 break; 1297 } 1298 1299 return 0; 1300 } 1301 1302 /* 1303 * fnic_wq_copy_cmpl_handler 1304 * Routine to process wq copy 1305 */ 1306 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1307 { 1308 unsigned int wq_work_done = 0; 1309 unsigned int i, cq_index; 1310 unsigned int cur_work_done; 1311 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1312 u64 start_jiffies = 0; 1313 u64 end_jiffies = 0; 1314 u64 delta_jiffies = 0; 1315 u64 delta_ms = 0; 1316 1317 for (i = 0; i < fnic->wq_copy_count; i++) { 1318 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1319 1320 start_jiffies = jiffies; 1321 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1322 fnic_fcpio_cmpl_handler, 1323 copy_work_to_do); 1324 end_jiffies = jiffies; 1325 1326 wq_work_done += cur_work_done; 1327 delta_jiffies = end_jiffies - start_jiffies; 1328 if (delta_jiffies > 1329 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { 1330 atomic64_set(&misc_stats->max_isr_jiffies, 1331 delta_jiffies); 1332 delta_ms = jiffies_to_msecs(delta_jiffies); 1333 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); 1334 atomic64_set(&misc_stats->corr_work_done, 1335 cur_work_done); 1336 } 1337 } 1338 return wq_work_done; 1339 } 1340 1341 static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data) 1342 { 1343 const int tag = scsi_cmd_to_rq(sc)->tag; 1344 struct fnic *fnic = data; 1345 struct fnic_io_req *io_req; 1346 unsigned long flags = 0; 1347 spinlock_t *io_lock; 1348 unsigned long start_time = 0; 1349 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1350 1351 io_lock = fnic_io_lock_tag(fnic, tag); 1352 spin_lock_irqsave(io_lock, flags); 1353 1354 io_req = fnic_priv(sc)->io_req; 1355 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 1356 !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { 1357 /* 1358 * We will be here only when FW completes reset 1359 * without sending completions for outstanding ios. 1360 */ 1361 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1362 if (io_req && io_req->dr_done) 1363 complete(io_req->dr_done); 1364 else if (io_req && io_req->abts_done) 1365 complete(io_req->abts_done); 1366 spin_unlock_irqrestore(io_lock, flags); 1367 return true; 1368 } else if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 1369 spin_unlock_irqrestore(io_lock, flags); 1370 return true; 1371 } 1372 if (!io_req) { 1373 spin_unlock_irqrestore(io_lock, flags); 1374 goto cleanup_scsi_cmd; 1375 } 1376 1377 fnic_priv(sc)->io_req = NULL; 1378 1379 spin_unlock_irqrestore(io_lock, flags); 1380 1381 /* 1382 * If there is a scsi_cmnd associated with this io_req, then 1383 * free the corresponding state 1384 */ 1385 start_time = io_req->start_time; 1386 fnic_release_ioreq_buf(fnic, io_req, sc); 1387 mempool_free(io_req, fnic->io_req_pool); 1388 1389 cleanup_scsi_cmd: 1390 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1391 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1392 "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", 1393 tag, sc, jiffies - start_time); 1394 1395 if (atomic64_read(&fnic->io_cmpl_skip)) 1396 atomic64_dec(&fnic->io_cmpl_skip); 1397 else 1398 atomic64_inc(&fnic_stats->io_stats.io_completions); 1399 1400 /* Complete the command to SCSI */ 1401 if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) 1402 shost_printk(KERN_ERR, fnic->lport->host, 1403 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", 1404 tag, sc); 1405 1406 FNIC_TRACE(fnic_cleanup_io, 1407 sc->device->host->host_no, tag, sc, 1408 jiffies_to_msecs(jiffies - start_time), 1409 0, ((u64)sc->cmnd[0] << 32 | 1410 (u64)sc->cmnd[2] << 24 | 1411 (u64)sc->cmnd[3] << 16 | 1412 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1413 fnic_flags_and_state(sc)); 1414 1415 scsi_done(sc); 1416 1417 return true; 1418 } 1419 1420 static void fnic_cleanup_io(struct fnic *fnic) 1421 { 1422 scsi_host_busy_iter(fnic->lport->host, 1423 fnic_cleanup_io_iter, fnic); 1424 } 1425 1426 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1427 struct fcpio_host_req *desc) 1428 { 1429 u32 id; 1430 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1431 struct fnic_io_req *io_req; 1432 struct scsi_cmnd *sc; 1433 unsigned long flags; 1434 spinlock_t *io_lock; 1435 unsigned long start_time = 0; 1436 1437 /* get the tag reference */ 1438 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1439 id &= FNIC_TAG_MASK; 1440 1441 if (id >= fnic->fnic_max_tag_id) 1442 return; 1443 1444 sc = scsi_host_find_tag(fnic->lport->host, id); 1445 if (!sc) 1446 return; 1447 1448 io_lock = fnic_io_lock_hash(fnic, sc); 1449 spin_lock_irqsave(io_lock, flags); 1450 1451 /* Get the IO context which this desc refers to */ 1452 io_req = fnic_priv(sc)->io_req; 1453 1454 /* fnic interrupts are turned off by now */ 1455 1456 if (!io_req) { 1457 spin_unlock_irqrestore(io_lock, flags); 1458 goto wq_copy_cleanup_scsi_cmd; 1459 } 1460 1461 fnic_priv(sc)->io_req = NULL; 1462 1463 spin_unlock_irqrestore(io_lock, flags); 1464 1465 start_time = io_req->start_time; 1466 fnic_release_ioreq_buf(fnic, io_req, sc); 1467 mempool_free(io_req, fnic->io_req_pool); 1468 1469 wq_copy_cleanup_scsi_cmd: 1470 sc->result = DID_NO_CONNECT << 16; 1471 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1472 " DID_NO_CONNECT\n"); 1473 1474 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1475 sc->device->host->host_no, id, sc, 1476 jiffies_to_msecs(jiffies - start_time), 1477 0, ((u64)sc->cmnd[0] << 32 | 1478 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1479 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1480 fnic_flags_and_state(sc)); 1481 1482 scsi_done(sc); 1483 } 1484 1485 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1486 u32 task_req, u8 *fc_lun, 1487 struct fnic_io_req *io_req) 1488 { 1489 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1490 struct Scsi_Host *host = fnic->lport->host; 1491 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1492 unsigned long flags; 1493 1494 spin_lock_irqsave(host->host_lock, flags); 1495 if (unlikely(fnic_chk_state_flags_locked(fnic, 1496 FNIC_FLAGS_IO_BLOCKED))) { 1497 spin_unlock_irqrestore(host->host_lock, flags); 1498 return 1; 1499 } else 1500 atomic_inc(&fnic->in_flight); 1501 spin_unlock_irqrestore(host->host_lock, flags); 1502 1503 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1504 1505 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1506 free_wq_copy_descs(fnic, wq); 1507 1508 if (!vnic_wq_copy_desc_avail(wq)) { 1509 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1510 atomic_dec(&fnic->in_flight); 1511 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1512 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1513 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1514 return 1; 1515 } 1516 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1517 0, task_req, tag, fc_lun, io_req->port_id, 1518 fnic->config.ra_tov, fnic->config.ed_tov); 1519 1520 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1521 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1522 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1523 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1524 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1525 1526 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1527 atomic_dec(&fnic->in_flight); 1528 1529 return 0; 1530 } 1531 1532 struct fnic_rport_abort_io_iter_data { 1533 struct fnic *fnic; 1534 u32 port_id; 1535 int term_cnt; 1536 }; 1537 1538 static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data) 1539 { 1540 struct fnic_rport_abort_io_iter_data *iter_data = data; 1541 struct fnic *fnic = iter_data->fnic; 1542 int abt_tag = scsi_cmd_to_rq(sc)->tag; 1543 struct fnic_io_req *io_req; 1544 spinlock_t *io_lock; 1545 unsigned long flags; 1546 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1547 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1548 struct scsi_lun fc_lun; 1549 enum fnic_ioreq_state old_ioreq_state; 1550 1551 io_lock = fnic_io_lock_tag(fnic, abt_tag); 1552 spin_lock_irqsave(io_lock, flags); 1553 1554 io_req = fnic_priv(sc)->io_req; 1555 1556 if (!io_req || io_req->port_id != iter_data->port_id) { 1557 spin_unlock_irqrestore(io_lock, flags); 1558 return true; 1559 } 1560 1561 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 1562 !(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED)) { 1563 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1564 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1565 sc); 1566 spin_unlock_irqrestore(io_lock, flags); 1567 return true; 1568 } 1569 1570 /* 1571 * Found IO that is still pending with firmware and 1572 * belongs to rport that went away 1573 */ 1574 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1575 spin_unlock_irqrestore(io_lock, flags); 1576 return true; 1577 } 1578 if (io_req->abts_done) { 1579 shost_printk(KERN_ERR, fnic->lport->host, 1580 "fnic_rport_exch_reset: io_req->abts_done is set " 1581 "state is %s\n", 1582 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 1583 } 1584 1585 if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) { 1586 shost_printk(KERN_ERR, fnic->lport->host, 1587 "rport_exch_reset " 1588 "IO not yet issued %p tag 0x%x flags " 1589 "%x state %d\n", 1590 sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state); 1591 } 1592 old_ioreq_state = fnic_priv(sc)->state; 1593 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 1594 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 1595 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 1596 atomic64_inc(&reset_stats->device_reset_terminates); 1597 abt_tag |= FNIC_TAG_DEV_RST; 1598 } 1599 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1600 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); 1601 BUG_ON(io_req->abts_done); 1602 1603 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1604 "fnic_rport_reset_exch: Issuing abts\n"); 1605 1606 spin_unlock_irqrestore(io_lock, flags); 1607 1608 /* Now queue the abort command to firmware */ 1609 int_to_scsilun(sc->device->lun, &fc_lun); 1610 1611 if (fnic_queue_abort_io_req(fnic, abt_tag, 1612 FCPIO_ITMF_ABT_TASK_TERM, 1613 fc_lun.scsi_lun, io_req)) { 1614 /* 1615 * Revert the cmd state back to old state, if 1616 * it hasn't changed in between. This cmd will get 1617 * aborted later by scsi_eh, or cleaned up during 1618 * lun reset 1619 */ 1620 spin_lock_irqsave(io_lock, flags); 1621 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 1622 fnic_priv(sc)->state = old_ioreq_state; 1623 spin_unlock_irqrestore(io_lock, flags); 1624 } else { 1625 spin_lock_irqsave(io_lock, flags); 1626 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) 1627 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 1628 else 1629 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED; 1630 spin_unlock_irqrestore(io_lock, flags); 1631 atomic64_inc(&term_stats->terminates); 1632 iter_data->term_cnt++; 1633 } 1634 return true; 1635 } 1636 1637 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1638 { 1639 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1640 struct fnic_rport_abort_io_iter_data iter_data = { 1641 .fnic = fnic, 1642 .port_id = port_id, 1643 .term_cnt = 0, 1644 }; 1645 1646 FNIC_SCSI_DBG(KERN_DEBUG, 1647 fnic->lport->host, 1648 "fnic_rport_exch_reset called portid 0x%06x\n", 1649 port_id); 1650 1651 if (fnic->in_remove) 1652 return; 1653 1654 scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter, 1655 &iter_data); 1656 if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates)) 1657 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt); 1658 1659 } 1660 1661 void fnic_terminate_rport_io(struct fc_rport *rport) 1662 { 1663 struct fc_rport_libfc_priv *rdata; 1664 struct fc_lport *lport; 1665 struct fnic *fnic; 1666 1667 if (!rport) { 1668 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1669 return; 1670 } 1671 rdata = rport->dd_data; 1672 1673 if (!rdata) { 1674 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1675 return; 1676 } 1677 lport = rdata->local_port; 1678 1679 if (!lport) { 1680 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1681 return; 1682 } 1683 fnic = lport_priv(lport); 1684 FNIC_SCSI_DBG(KERN_DEBUG, 1685 fnic->lport->host, "fnic_terminate_rport_io called" 1686 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1687 rport->port_name, rport->node_name, rport, 1688 rport->port_id); 1689 1690 if (fnic->in_remove) 1691 return; 1692 1693 fnic_rport_exch_reset(fnic, rport->port_id); 1694 } 1695 1696 /* 1697 * This function is exported to SCSI for sending abort cmnds. 1698 * A SCSI IO is represented by a io_req in the driver. 1699 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1700 */ 1701 int fnic_abort_cmd(struct scsi_cmnd *sc) 1702 { 1703 struct request *const rq = scsi_cmd_to_rq(sc); 1704 struct fc_lport *lp; 1705 struct fnic *fnic; 1706 struct fnic_io_req *io_req = NULL; 1707 struct fc_rport *rport; 1708 spinlock_t *io_lock; 1709 unsigned long flags; 1710 unsigned long start_time = 0; 1711 int ret = SUCCESS; 1712 u32 task_req = 0; 1713 struct scsi_lun fc_lun; 1714 struct fnic_stats *fnic_stats; 1715 struct abort_stats *abts_stats; 1716 struct terminate_stats *term_stats; 1717 enum fnic_ioreq_state old_ioreq_state; 1718 const int tag = rq->tag; 1719 unsigned long abt_issued_time; 1720 DECLARE_COMPLETION_ONSTACK(tm_done); 1721 1722 /* Wait for rport to unblock */ 1723 fc_block_scsi_eh(sc); 1724 1725 /* Get local-port, check ready and link up */ 1726 lp = shost_priv(sc->device->host); 1727 1728 fnic = lport_priv(lp); 1729 fnic_stats = &fnic->fnic_stats; 1730 abts_stats = &fnic->fnic_stats.abts_stats; 1731 term_stats = &fnic->fnic_stats.term_stats; 1732 1733 rport = starget_to_rport(scsi_target(sc->device)); 1734 FNIC_SCSI_DBG(KERN_DEBUG, 1735 fnic->lport->host, 1736 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1737 rport->port_id, sc->device->lun, tag, fnic_priv(sc)->flags); 1738 1739 fnic_priv(sc)->flags = FNIC_NO_FLAGS; 1740 1741 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1742 ret = FAILED; 1743 goto fnic_abort_cmd_end; 1744 } 1745 1746 /* 1747 * Avoid a race between SCSI issuing the abort and the device 1748 * completing the command. 1749 * 1750 * If the command is already completed by the fw cmpl code, 1751 * we just return SUCCESS from here. This means that the abort 1752 * succeeded. In the SCSI ML, since the timeout for command has 1753 * happened, the completion wont actually complete the command 1754 * and it will be considered as an aborted command 1755 * 1756 * .io_req will not be cleared except while holding io_req_lock. 1757 */ 1758 io_lock = fnic_io_lock_hash(fnic, sc); 1759 spin_lock_irqsave(io_lock, flags); 1760 io_req = fnic_priv(sc)->io_req; 1761 if (!io_req) { 1762 spin_unlock_irqrestore(io_lock, flags); 1763 goto fnic_abort_cmd_end; 1764 } 1765 1766 io_req->abts_done = &tm_done; 1767 1768 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1769 spin_unlock_irqrestore(io_lock, flags); 1770 goto wait_pending; 1771 } 1772 1773 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1774 if (abt_issued_time <= 6000) 1775 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1776 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1777 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1778 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1779 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1780 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1781 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1782 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1783 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1784 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1785 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1786 else 1787 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1788 1789 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1790 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1791 /* 1792 * Command is still pending, need to abort it 1793 * If the firmware completes the command after this point, 1794 * the completion wont be done till mid-layer, since abort 1795 * has already started. 1796 */ 1797 old_ioreq_state = fnic_priv(sc)->state; 1798 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 1799 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 1800 1801 spin_unlock_irqrestore(io_lock, flags); 1802 1803 /* 1804 * Check readiness of the remote port. If the path to remote 1805 * port is up, then send abts to the remote port to terminate 1806 * the IO. Else, just locally terminate the IO in the firmware 1807 */ 1808 if (fc_remote_port_chkready(rport) == 0) 1809 task_req = FCPIO_ITMF_ABT_TASK; 1810 else { 1811 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1812 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1813 } 1814 1815 /* Now queue the abort command to firmware */ 1816 int_to_scsilun(sc->device->lun, &fc_lun); 1817 1818 if (fnic_queue_abort_io_req(fnic, tag, task_req, fc_lun.scsi_lun, 1819 io_req)) { 1820 spin_lock_irqsave(io_lock, flags); 1821 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 1822 fnic_priv(sc)->state = old_ioreq_state; 1823 io_req = fnic_priv(sc)->io_req; 1824 if (io_req) 1825 io_req->abts_done = NULL; 1826 spin_unlock_irqrestore(io_lock, flags); 1827 ret = FAILED; 1828 goto fnic_abort_cmd_end; 1829 } 1830 if (task_req == FCPIO_ITMF_ABT_TASK) { 1831 fnic_priv(sc)->flags |= FNIC_IO_ABTS_ISSUED; 1832 atomic64_inc(&fnic_stats->abts_stats.aborts); 1833 } else { 1834 fnic_priv(sc)->flags |= FNIC_IO_TERM_ISSUED; 1835 atomic64_inc(&fnic_stats->term_stats.terminates); 1836 } 1837 1838 /* 1839 * We queued an abort IO, wait for its completion. 1840 * Once the firmware completes the abort command, it will 1841 * wake up this thread. 1842 */ 1843 wait_pending: 1844 wait_for_completion_timeout(&tm_done, 1845 msecs_to_jiffies 1846 (2 * fnic->config.ra_tov + 1847 fnic->config.ed_tov)); 1848 1849 /* Check the abort status */ 1850 spin_lock_irqsave(io_lock, flags); 1851 1852 io_req = fnic_priv(sc)->io_req; 1853 if (!io_req) { 1854 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1855 spin_unlock_irqrestore(io_lock, flags); 1856 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 1857 ret = FAILED; 1858 goto fnic_abort_cmd_end; 1859 } 1860 io_req->abts_done = NULL; 1861 1862 /* fw did not complete abort, timed out */ 1863 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) { 1864 spin_unlock_irqrestore(io_lock, flags); 1865 if (task_req == FCPIO_ITMF_ABT_TASK) { 1866 atomic64_inc(&abts_stats->abort_drv_timeouts); 1867 } else { 1868 atomic64_inc(&term_stats->terminate_drv_timeouts); 1869 } 1870 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_TIMED_OUT; 1871 ret = FAILED; 1872 goto fnic_abort_cmd_end; 1873 } 1874 1875 /* IO out of order */ 1876 1877 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1878 spin_unlock_irqrestore(io_lock, flags); 1879 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1880 "Issuing Host reset due to out of order IO\n"); 1881 1882 ret = FAILED; 1883 goto fnic_abort_cmd_end; 1884 } 1885 1886 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 1887 1888 start_time = io_req->start_time; 1889 /* 1890 * firmware completed the abort, check the status, 1891 * free the io_req if successful. If abort fails, 1892 * Device reset will clean the I/O. 1893 */ 1894 if (fnic_priv(sc)->abts_status == FCPIO_SUCCESS) { 1895 fnic_priv(sc)->io_req = NULL; 1896 } else { 1897 ret = FAILED; 1898 spin_unlock_irqrestore(io_lock, flags); 1899 goto fnic_abort_cmd_end; 1900 } 1901 1902 spin_unlock_irqrestore(io_lock, flags); 1903 1904 fnic_release_ioreq_buf(fnic, io_req, sc); 1905 mempool_free(io_req, fnic->io_req_pool); 1906 1907 /* Call SCSI completion function to complete the IO */ 1908 sc->result = DID_ABORT << 16; 1909 scsi_done(sc); 1910 atomic64_dec(&fnic_stats->io_stats.active_ios); 1911 if (atomic64_read(&fnic->io_cmpl_skip)) 1912 atomic64_dec(&fnic->io_cmpl_skip); 1913 else 1914 atomic64_inc(&fnic_stats->io_stats.io_completions); 1915 1916 fnic_abort_cmd_end: 1917 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, tag, sc, 1918 jiffies_to_msecs(jiffies - start_time), 1919 0, ((u64)sc->cmnd[0] << 32 | 1920 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1921 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1922 fnic_flags_and_state(sc)); 1923 1924 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1925 "Returning from abort cmd type %x %s\n", task_req, 1926 (ret == SUCCESS) ? 1927 "SUCCESS" : "FAILED"); 1928 return ret; 1929 } 1930 1931 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 1932 struct scsi_cmnd *sc, 1933 struct fnic_io_req *io_req) 1934 { 1935 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1936 struct Scsi_Host *host = fnic->lport->host; 1937 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1938 struct scsi_lun fc_lun; 1939 int ret = 0; 1940 unsigned long intr_flags; 1941 1942 spin_lock_irqsave(host->host_lock, intr_flags); 1943 if (unlikely(fnic_chk_state_flags_locked(fnic, 1944 FNIC_FLAGS_IO_BLOCKED))) { 1945 spin_unlock_irqrestore(host->host_lock, intr_flags); 1946 return FAILED; 1947 } else 1948 atomic_inc(&fnic->in_flight); 1949 spin_unlock_irqrestore(host->host_lock, intr_flags); 1950 1951 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 1952 1953 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1954 free_wq_copy_descs(fnic, wq); 1955 1956 if (!vnic_wq_copy_desc_avail(wq)) { 1957 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1958 "queue_dr_io_req failure - no descriptors\n"); 1959 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 1960 ret = -EAGAIN; 1961 goto lr_io_req_end; 1962 } 1963 1964 /* fill in the lun info */ 1965 int_to_scsilun(sc->device->lun, &fc_lun); 1966 1967 fnic_queue_wq_copy_desc_itmf(wq, scsi_cmd_to_rq(sc)->tag | FNIC_TAG_DEV_RST, 1968 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 1969 fc_lun.scsi_lun, io_req->port_id, 1970 fnic->config.ra_tov, fnic->config.ed_tov); 1971 1972 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1973 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1974 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1975 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1976 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1977 1978 lr_io_req_end: 1979 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 1980 atomic_dec(&fnic->in_flight); 1981 1982 return ret; 1983 } 1984 1985 struct fnic_pending_aborts_iter_data { 1986 struct fnic *fnic; 1987 struct scsi_cmnd *lr_sc; 1988 struct scsi_device *lun_dev; 1989 int ret; 1990 }; 1991 1992 static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, void *data) 1993 { 1994 struct fnic_pending_aborts_iter_data *iter_data = data; 1995 struct fnic *fnic = iter_data->fnic; 1996 struct scsi_device *lun_dev = iter_data->lun_dev; 1997 int abt_tag = scsi_cmd_to_rq(sc)->tag; 1998 struct fnic_io_req *io_req; 1999 spinlock_t *io_lock; 2000 unsigned long flags; 2001 struct scsi_lun fc_lun; 2002 DECLARE_COMPLETION_ONSTACK(tm_done); 2003 enum fnic_ioreq_state old_ioreq_state; 2004 2005 if (sc == iter_data->lr_sc || sc->device != lun_dev) 2006 return true; 2007 2008 io_lock = fnic_io_lock_tag(fnic, abt_tag); 2009 spin_lock_irqsave(io_lock, flags); 2010 io_req = fnic_priv(sc)->io_req; 2011 if (!io_req) { 2012 spin_unlock_irqrestore(io_lock, flags); 2013 return true; 2014 } 2015 2016 /* 2017 * Found IO that is still pending with firmware and 2018 * belongs to the LUN that we are resetting 2019 */ 2020 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2021 "Found IO in %s on lun\n", 2022 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2023 2024 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 2025 spin_unlock_irqrestore(io_lock, flags); 2026 return true; 2027 } 2028 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 2029 (!(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED))) { 2030 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2031 "%s dev rst not pending sc 0x%p\n", __func__, 2032 sc); 2033 spin_unlock_irqrestore(io_lock, flags); 2034 return true; 2035 } 2036 2037 if (io_req->abts_done) 2038 shost_printk(KERN_ERR, fnic->lport->host, 2039 "%s: io_req->abts_done is set state is %s\n", 2040 __func__, fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2041 old_ioreq_state = fnic_priv(sc)->state; 2042 /* 2043 * Any pending IO issued prior to reset is expected to be 2044 * in abts pending state, if not we need to set 2045 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2046 * When IO is completed, the IO will be handed over and 2047 * handled in this function. 2048 */ 2049 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 2050 2051 BUG_ON(io_req->abts_done); 2052 2053 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 2054 abt_tag |= FNIC_TAG_DEV_RST; 2055 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2056 "%s: dev rst sc 0x%p\n", __func__, sc); 2057 } 2058 2059 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 2060 io_req->abts_done = &tm_done; 2061 spin_unlock_irqrestore(io_lock, flags); 2062 2063 /* Now queue the abort command to firmware */ 2064 int_to_scsilun(sc->device->lun, &fc_lun); 2065 2066 if (fnic_queue_abort_io_req(fnic, abt_tag, 2067 FCPIO_ITMF_ABT_TASK_TERM, 2068 fc_lun.scsi_lun, io_req)) { 2069 spin_lock_irqsave(io_lock, flags); 2070 io_req = fnic_priv(sc)->io_req; 2071 if (io_req) 2072 io_req->abts_done = NULL; 2073 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 2074 fnic_priv(sc)->state = old_ioreq_state; 2075 spin_unlock_irqrestore(io_lock, flags); 2076 iter_data->ret = FAILED; 2077 return false; 2078 } else { 2079 spin_lock_irqsave(io_lock, flags); 2080 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) 2081 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 2082 spin_unlock_irqrestore(io_lock, flags); 2083 } 2084 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED; 2085 2086 wait_for_completion_timeout(&tm_done, msecs_to_jiffies 2087 (fnic->config.ed_tov)); 2088 2089 /* Recheck cmd state to check if it is now aborted */ 2090 spin_lock_irqsave(io_lock, flags); 2091 io_req = fnic_priv(sc)->io_req; 2092 if (!io_req) { 2093 spin_unlock_irqrestore(io_lock, flags); 2094 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 2095 return true; 2096 } 2097 2098 io_req->abts_done = NULL; 2099 2100 /* if abort is still pending with fw, fail */ 2101 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) { 2102 spin_unlock_irqrestore(io_lock, flags); 2103 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE; 2104 iter_data->ret = FAILED; 2105 return false; 2106 } 2107 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 2108 2109 /* original sc used for lr is handled by dev reset code */ 2110 if (sc != iter_data->lr_sc) 2111 fnic_priv(sc)->io_req = NULL; 2112 spin_unlock_irqrestore(io_lock, flags); 2113 2114 /* original sc used for lr is handled by dev reset code */ 2115 if (sc != iter_data->lr_sc) { 2116 fnic_release_ioreq_buf(fnic, io_req, sc); 2117 mempool_free(io_req, fnic->io_req_pool); 2118 } 2119 2120 /* 2121 * Any IO is returned during reset, it needs to call scsi_done 2122 * to return the scsi_cmnd to upper layer. 2123 */ 2124 /* Set result to let upper SCSI layer retry */ 2125 sc->result = DID_RESET << 16; 2126 scsi_done(sc); 2127 2128 return true; 2129 } 2130 2131 /* 2132 * Clean up any pending aborts on the lun 2133 * For each outstanding IO on this lun, whose abort is not completed by fw, 2134 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2135 * successfully aborted, 1 otherwise 2136 */ 2137 static int fnic_clean_pending_aborts(struct fnic *fnic, 2138 struct scsi_cmnd *lr_sc, 2139 bool new_sc) 2140 2141 { 2142 int ret = SUCCESS; 2143 struct fnic_pending_aborts_iter_data iter_data = { 2144 .fnic = fnic, 2145 .lun_dev = lr_sc->device, 2146 .ret = SUCCESS, 2147 }; 2148 2149 if (new_sc) 2150 iter_data.lr_sc = lr_sc; 2151 2152 scsi_host_busy_iter(fnic->lport->host, 2153 fnic_pending_aborts_iter, &iter_data); 2154 if (iter_data.ret == FAILED) { 2155 ret = iter_data.ret; 2156 goto clean_pending_aborts_end; 2157 } 2158 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2159 2160 /* walk again to check, if IOs are still pending in fw */ 2161 if (fnic_is_abts_pending(fnic, lr_sc)) 2162 ret = FAILED; 2163 2164 clean_pending_aborts_end: 2165 return ret; 2166 } 2167 2168 /* 2169 * fnic_scsi_host_start_tag 2170 * Allocates tagid from host's tag list 2171 **/ 2172 static inline int 2173 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2174 { 2175 struct request *rq = scsi_cmd_to_rq(sc); 2176 struct request_queue *q = rq->q; 2177 struct request *dummy; 2178 2179 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); 2180 if (IS_ERR(dummy)) 2181 return SCSI_NO_TAG; 2182 2183 rq->tag = dummy->tag; 2184 sc->host_scribble = (unsigned char *)dummy; 2185 2186 return dummy->tag; 2187 } 2188 2189 /* 2190 * fnic_scsi_host_end_tag 2191 * frees tag allocated by fnic_scsi_host_start_tag. 2192 **/ 2193 static inline void 2194 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2195 { 2196 struct request *dummy = (struct request *)sc->host_scribble; 2197 2198 blk_mq_free_request(dummy); 2199 } 2200 2201 /* 2202 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2203 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2204 * on the LUN. 2205 */ 2206 int fnic_device_reset(struct scsi_cmnd *sc) 2207 { 2208 struct request *rq = scsi_cmd_to_rq(sc); 2209 struct fc_lport *lp; 2210 struct fnic *fnic; 2211 struct fnic_io_req *io_req = NULL; 2212 struct fc_rport *rport; 2213 int status; 2214 int ret = FAILED; 2215 spinlock_t *io_lock; 2216 unsigned long flags; 2217 unsigned long start_time = 0; 2218 struct scsi_lun fc_lun; 2219 struct fnic_stats *fnic_stats; 2220 struct reset_stats *reset_stats; 2221 int tag = rq->tag; 2222 DECLARE_COMPLETION_ONSTACK(tm_done); 2223 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2224 bool new_sc = 0; 2225 2226 /* Wait for rport to unblock */ 2227 fc_block_scsi_eh(sc); 2228 2229 /* Get local-port, check ready and link up */ 2230 lp = shost_priv(sc->device->host); 2231 2232 fnic = lport_priv(lp); 2233 fnic_stats = &fnic->fnic_stats; 2234 reset_stats = &fnic->fnic_stats.reset_stats; 2235 2236 atomic64_inc(&reset_stats->device_resets); 2237 2238 rport = starget_to_rport(scsi_target(sc->device)); 2239 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2240 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2241 rport->port_id, sc->device->lun, sc); 2242 2243 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2244 goto fnic_device_reset_end; 2245 2246 /* Check if remote port up */ 2247 if (fc_remote_port_chkready(rport)) { 2248 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2249 goto fnic_device_reset_end; 2250 } 2251 2252 fnic_priv(sc)->flags = FNIC_DEVICE_RESET; 2253 /* Allocate tag if not present */ 2254 2255 if (unlikely(tag < 0)) { 2256 /* 2257 * Really should fix the midlayer to pass in a proper 2258 * request for ioctls... 2259 */ 2260 tag = fnic_scsi_host_start_tag(fnic, sc); 2261 if (unlikely(tag == SCSI_NO_TAG)) 2262 goto fnic_device_reset_end; 2263 tag_gen_flag = 1; 2264 new_sc = 1; 2265 } 2266 io_lock = fnic_io_lock_hash(fnic, sc); 2267 spin_lock_irqsave(io_lock, flags); 2268 io_req = fnic_priv(sc)->io_req; 2269 2270 /* 2271 * If there is a io_req attached to this command, then use it, 2272 * else allocate a new one. 2273 */ 2274 if (!io_req) { 2275 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2276 if (!io_req) { 2277 spin_unlock_irqrestore(io_lock, flags); 2278 goto fnic_device_reset_end; 2279 } 2280 memset(io_req, 0, sizeof(*io_req)); 2281 io_req->port_id = rport->port_id; 2282 fnic_priv(sc)->io_req = io_req; 2283 } 2284 io_req->dr_done = &tm_done; 2285 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING; 2286 fnic_priv(sc)->lr_status = FCPIO_INVALID_CODE; 2287 spin_unlock_irqrestore(io_lock, flags); 2288 2289 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2290 2291 /* 2292 * issue the device reset, if enqueue failed, clean up the ioreq 2293 * and break assoc with scsi cmd 2294 */ 2295 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2296 spin_lock_irqsave(io_lock, flags); 2297 io_req = fnic_priv(sc)->io_req; 2298 if (io_req) 2299 io_req->dr_done = NULL; 2300 goto fnic_device_reset_clean; 2301 } 2302 spin_lock_irqsave(io_lock, flags); 2303 fnic_priv(sc)->flags |= FNIC_DEV_RST_ISSUED; 2304 spin_unlock_irqrestore(io_lock, flags); 2305 2306 /* 2307 * Wait on the local completion for LUN reset. The io_req may be 2308 * freed while we wait since we hold no lock. 2309 */ 2310 wait_for_completion_timeout(&tm_done, 2311 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2312 2313 spin_lock_irqsave(io_lock, flags); 2314 io_req = fnic_priv(sc)->io_req; 2315 if (!io_req) { 2316 spin_unlock_irqrestore(io_lock, flags); 2317 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2318 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2319 goto fnic_device_reset_end; 2320 } 2321 io_req->dr_done = NULL; 2322 2323 status = fnic_priv(sc)->lr_status; 2324 2325 /* 2326 * If lun reset not completed, bail out with failed. io_req 2327 * gets cleaned up during higher levels of EH 2328 */ 2329 if (status == FCPIO_INVALID_CODE) { 2330 atomic64_inc(&reset_stats->device_reset_timeouts); 2331 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2332 "Device reset timed out\n"); 2333 fnic_priv(sc)->flags |= FNIC_DEV_RST_TIMED_OUT; 2334 spin_unlock_irqrestore(io_lock, flags); 2335 int_to_scsilun(sc->device->lun, &fc_lun); 2336 /* 2337 * Issue abort and terminate on device reset request. 2338 * If q'ing of terminate fails, retry it after a delay. 2339 */ 2340 while (1) { 2341 spin_lock_irqsave(io_lock, flags); 2342 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TERM_ISSUED) { 2343 spin_unlock_irqrestore(io_lock, flags); 2344 break; 2345 } 2346 spin_unlock_irqrestore(io_lock, flags); 2347 if (fnic_queue_abort_io_req(fnic, 2348 tag | FNIC_TAG_DEV_RST, 2349 FCPIO_ITMF_ABT_TASK_TERM, 2350 fc_lun.scsi_lun, io_req)) { 2351 wait_for_completion_timeout(&tm_done, 2352 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2353 } else { 2354 spin_lock_irqsave(io_lock, flags); 2355 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 2356 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 2357 io_req->abts_done = &tm_done; 2358 spin_unlock_irqrestore(io_lock, flags); 2359 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2360 "Abort and terminate issued on Device reset " 2361 "tag 0x%x sc 0x%p\n", tag, sc); 2362 break; 2363 } 2364 } 2365 while (1) { 2366 spin_lock_irqsave(io_lock, flags); 2367 if (!(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { 2368 spin_unlock_irqrestore(io_lock, flags); 2369 wait_for_completion_timeout(&tm_done, 2370 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2371 break; 2372 } else { 2373 io_req = fnic_priv(sc)->io_req; 2374 io_req->abts_done = NULL; 2375 goto fnic_device_reset_clean; 2376 } 2377 } 2378 } else { 2379 spin_unlock_irqrestore(io_lock, flags); 2380 } 2381 2382 /* Completed, but not successful, clean up the io_req, return fail */ 2383 if (status != FCPIO_SUCCESS) { 2384 spin_lock_irqsave(io_lock, flags); 2385 FNIC_SCSI_DBG(KERN_DEBUG, 2386 fnic->lport->host, 2387 "Device reset completed - failed\n"); 2388 io_req = fnic_priv(sc)->io_req; 2389 goto fnic_device_reset_clean; 2390 } 2391 2392 /* 2393 * Clean up any aborts on this lun that have still not 2394 * completed. If any of these fail, then LUN reset fails. 2395 * clean_pending_aborts cleans all cmds on this lun except 2396 * the lun reset cmd. If all cmds get cleaned, the lun reset 2397 * succeeds 2398 */ 2399 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2400 spin_lock_irqsave(io_lock, flags); 2401 io_req = fnic_priv(sc)->io_req; 2402 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2403 "Device reset failed" 2404 " since could not abort all IOs\n"); 2405 goto fnic_device_reset_clean; 2406 } 2407 2408 /* Clean lun reset command */ 2409 spin_lock_irqsave(io_lock, flags); 2410 io_req = fnic_priv(sc)->io_req; 2411 if (io_req) 2412 /* Completed, and successful */ 2413 ret = SUCCESS; 2414 2415 fnic_device_reset_clean: 2416 if (io_req) 2417 fnic_priv(sc)->io_req = NULL; 2418 2419 spin_unlock_irqrestore(io_lock, flags); 2420 2421 if (io_req) { 2422 start_time = io_req->start_time; 2423 fnic_release_ioreq_buf(fnic, io_req, sc); 2424 mempool_free(io_req, fnic->io_req_pool); 2425 } 2426 2427 fnic_device_reset_end: 2428 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc, 2429 jiffies_to_msecs(jiffies - start_time), 2430 0, ((u64)sc->cmnd[0] << 32 | 2431 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2432 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2433 fnic_flags_and_state(sc)); 2434 2435 /* free tag if it is allocated */ 2436 if (unlikely(tag_gen_flag)) 2437 fnic_scsi_host_end_tag(fnic, sc); 2438 2439 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2440 "Returning from device reset %s\n", 2441 (ret == SUCCESS) ? 2442 "SUCCESS" : "FAILED"); 2443 2444 if (ret == FAILED) 2445 atomic64_inc(&reset_stats->device_reset_failures); 2446 2447 return ret; 2448 } 2449 2450 /* Clean up all IOs, clean up libFC local port */ 2451 int fnic_reset(struct Scsi_Host *shost) 2452 { 2453 struct fc_lport *lp; 2454 struct fnic *fnic; 2455 int ret = 0; 2456 struct reset_stats *reset_stats; 2457 2458 lp = shost_priv(shost); 2459 fnic = lport_priv(lp); 2460 reset_stats = &fnic->fnic_stats.reset_stats; 2461 2462 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2463 "fnic_reset called\n"); 2464 2465 atomic64_inc(&reset_stats->fnic_resets); 2466 2467 /* 2468 * Reset local port, this will clean up libFC exchanges, 2469 * reset remote port sessions, and if link is up, begin flogi 2470 */ 2471 ret = fc_lport_reset(lp); 2472 2473 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2474 "Returning from fnic reset %s\n", 2475 (ret == 0) ? 2476 "SUCCESS" : "FAILED"); 2477 2478 if (ret == 0) 2479 atomic64_inc(&reset_stats->fnic_reset_completions); 2480 else 2481 atomic64_inc(&reset_stats->fnic_reset_failures); 2482 2483 return ret; 2484 } 2485 2486 /* 2487 * SCSI Error handling calls driver's eh_host_reset if all prior 2488 * error handling levels return FAILED. If host reset completes 2489 * successfully, and if link is up, then Fabric login begins. 2490 * 2491 * Host Reset is the highest level of error recovery. If this fails, then 2492 * host is offlined by SCSI. 2493 * 2494 */ 2495 int fnic_host_reset(struct scsi_cmnd *sc) 2496 { 2497 int ret; 2498 unsigned long wait_host_tmo; 2499 struct Scsi_Host *shost = sc->device->host; 2500 struct fc_lport *lp = shost_priv(shost); 2501 struct fnic *fnic = lport_priv(lp); 2502 unsigned long flags; 2503 2504 spin_lock_irqsave(&fnic->fnic_lock, flags); 2505 if (!fnic->internal_reset_inprogress) { 2506 fnic->internal_reset_inprogress = true; 2507 } else { 2508 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2509 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2510 "host reset in progress skipping another host reset\n"); 2511 return SUCCESS; 2512 } 2513 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2514 2515 /* 2516 * If fnic_reset is successful, wait for fabric login to complete 2517 * scsi-ml tries to send a TUR to every device if host reset is 2518 * successful, so before returning to scsi, fabric should be up 2519 */ 2520 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2521 if (ret == SUCCESS) { 2522 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2523 ret = FAILED; 2524 while (time_before(jiffies, wait_host_tmo)) { 2525 if ((lp->state == LPORT_ST_READY) && 2526 (lp->link_up)) { 2527 ret = SUCCESS; 2528 break; 2529 } 2530 ssleep(1); 2531 } 2532 } 2533 2534 spin_lock_irqsave(&fnic->fnic_lock, flags); 2535 fnic->internal_reset_inprogress = false; 2536 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2537 return ret; 2538 } 2539 2540 /* 2541 * This fxn is called from libFC when host is removed 2542 */ 2543 void fnic_scsi_abort_io(struct fc_lport *lp) 2544 { 2545 int err = 0; 2546 unsigned long flags; 2547 enum fnic_state old_state; 2548 struct fnic *fnic = lport_priv(lp); 2549 DECLARE_COMPLETION_ONSTACK(remove_wait); 2550 2551 /* Issue firmware reset for fnic, wait for reset to complete */ 2552 retry_fw_reset: 2553 spin_lock_irqsave(&fnic->fnic_lock, flags); 2554 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) && 2555 fnic->link_events) { 2556 /* fw reset is in progress, poll for its completion */ 2557 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2558 schedule_timeout(msecs_to_jiffies(100)); 2559 goto retry_fw_reset; 2560 } 2561 2562 fnic->remove_wait = &remove_wait; 2563 old_state = fnic->state; 2564 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2565 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2566 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2567 2568 err = fnic_fw_reset_handler(fnic); 2569 if (err) { 2570 spin_lock_irqsave(&fnic->fnic_lock, flags); 2571 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2572 fnic->state = old_state; 2573 fnic->remove_wait = NULL; 2574 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2575 return; 2576 } 2577 2578 /* Wait for firmware reset to complete */ 2579 wait_for_completion_timeout(&remove_wait, 2580 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2581 2582 spin_lock_irqsave(&fnic->fnic_lock, flags); 2583 fnic->remove_wait = NULL; 2584 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2585 "fnic_scsi_abort_io %s\n", 2586 (fnic->state == FNIC_IN_ETH_MODE) ? 2587 "SUCCESS" : "FAILED"); 2588 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2589 2590 } 2591 2592 /* 2593 * This fxn called from libFC to clean up driver IO state on link down 2594 */ 2595 void fnic_scsi_cleanup(struct fc_lport *lp) 2596 { 2597 unsigned long flags; 2598 enum fnic_state old_state; 2599 struct fnic *fnic = lport_priv(lp); 2600 2601 /* issue fw reset */ 2602 retry_fw_reset: 2603 spin_lock_irqsave(&fnic->fnic_lock, flags); 2604 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2605 /* fw reset is in progress, poll for its completion */ 2606 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2607 schedule_timeout(msecs_to_jiffies(100)); 2608 goto retry_fw_reset; 2609 } 2610 old_state = fnic->state; 2611 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2612 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2613 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2614 2615 if (fnic_fw_reset_handler(fnic)) { 2616 spin_lock_irqsave(&fnic->fnic_lock, flags); 2617 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2618 fnic->state = old_state; 2619 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2620 } 2621 2622 } 2623 2624 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2625 { 2626 } 2627 2628 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2629 { 2630 struct fnic *fnic = lport_priv(lp); 2631 2632 /* Non-zero sid, nothing to do */ 2633 if (sid) 2634 goto call_fc_exch_mgr_reset; 2635 2636 if (did) { 2637 fnic_rport_exch_reset(fnic, did); 2638 goto call_fc_exch_mgr_reset; 2639 } 2640 2641 /* 2642 * sid = 0, did = 0 2643 * link down or device being removed 2644 */ 2645 if (!fnic->in_remove) 2646 fnic_scsi_cleanup(lp); 2647 else 2648 fnic_scsi_abort_io(lp); 2649 2650 /* call libFC exch mgr reset to reset its exchanges */ 2651 call_fc_exch_mgr_reset: 2652 fc_exch_mgr_reset(lp, sid, did); 2653 2654 } 2655 2656 static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data) 2657 { 2658 struct fnic_pending_aborts_iter_data *iter_data = data; 2659 struct fnic *fnic = iter_data->fnic; 2660 int cmd_state; 2661 struct fnic_io_req *io_req; 2662 spinlock_t *io_lock; 2663 unsigned long flags; 2664 2665 /* 2666 * ignore this lun reset cmd or cmds that do not belong to 2667 * this lun 2668 */ 2669 if (iter_data->lr_sc && sc == iter_data->lr_sc) 2670 return true; 2671 if (iter_data->lun_dev && sc->device != iter_data->lun_dev) 2672 return true; 2673 2674 io_lock = fnic_io_lock_hash(fnic, sc); 2675 spin_lock_irqsave(io_lock, flags); 2676 2677 io_req = fnic_priv(sc)->io_req; 2678 if (!io_req) { 2679 spin_unlock_irqrestore(io_lock, flags); 2680 return true; 2681 } 2682 2683 /* 2684 * Found IO that is still pending with firmware and 2685 * belongs to the LUN that we are resetting 2686 */ 2687 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2688 "Found IO in %s on lun\n", 2689 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2690 cmd_state = fnic_priv(sc)->state; 2691 spin_unlock_irqrestore(io_lock, flags); 2692 if (cmd_state == FNIC_IOREQ_ABTS_PENDING) 2693 iter_data->ret = 1; 2694 2695 return iter_data->ret ? false : true; 2696 } 2697 2698 /* 2699 * fnic_is_abts_pending() is a helper function that 2700 * walks through tag map to check if there is any IOs pending,if there is one, 2701 * then it returns 1 (true), otherwise 0 (false) 2702 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2703 * otherwise, it checks for all IOs. 2704 */ 2705 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2706 { 2707 struct fnic_pending_aborts_iter_data iter_data = { 2708 .fnic = fnic, 2709 .lun_dev = NULL, 2710 .ret = 0, 2711 }; 2712 2713 if (lr_sc) { 2714 iter_data.lun_dev = lr_sc->device; 2715 iter_data.lr_sc = lr_sc; 2716 } 2717 2718 /* walk again to check, if IOs are still pending in fw */ 2719 scsi_host_busy_iter(fnic->lport->host, 2720 fnic_abts_pending_iter, &iter_data); 2721 2722 return iter_data.ret; 2723 } 2724