1 /* 2 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 */ 18 #include <linux/mempool.h> 19 #include <linux/errno.h> 20 #include <linux/init.h> 21 #include <linux/workqueue.h> 22 #include <linux/pci.h> 23 #include <linux/scatterlist.h> 24 #include <linux/skbuff.h> 25 #include <linux/spinlock.h> 26 #include <linux/etherdevice.h> 27 #include <linux/if_ether.h> 28 #include <linux/if_vlan.h> 29 #include <linux/delay.h> 30 #include <linux/gfp.h> 31 #include <scsi/scsi.h> 32 #include <scsi/scsi_host.h> 33 #include <scsi/scsi_device.h> 34 #include <scsi/scsi_cmnd.h> 35 #include <scsi/scsi_tcq.h> 36 #include <scsi/fc/fc_els.h> 37 #include <scsi/fc/fc_fcoe.h> 38 #include <scsi/libfc.h> 39 #include <scsi/fc_frame.h> 40 #include "fnic_io.h" 41 #include "fnic.h" 42 43 const char *fnic_state_str[] = { 44 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE", 45 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE", 46 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE", 47 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE", 48 }; 49 50 static const char *fnic_ioreq_state_str[] = { 51 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED", 52 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING", 53 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING", 54 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE", 55 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE", 56 }; 57 58 static const char *fcpio_status_str[] = { 59 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/ 60 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER", 61 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE", 62 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]", 63 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED", 64 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND", 65 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/ 66 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT", 67 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID", 68 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID", 69 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH", 70 [FCPIO_FW_ERR] = "FCPIO_FW_ERR", 71 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED", 72 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED", 73 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN", 74 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED", 75 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL", 76 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED", 77 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", 78 }; 79 80 const char *fnic_state_to_str(unsigned int state) 81 { 82 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) 83 return "unknown"; 84 85 return fnic_state_str[state]; 86 } 87 88 static const char *fnic_ioreq_state_to_str(unsigned int state) 89 { 90 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) || 91 !fnic_ioreq_state_str[state]) 92 return "unknown"; 93 94 return fnic_ioreq_state_str[state]; 95 } 96 97 static const char *fnic_fcpio_status_to_str(unsigned int status) 98 { 99 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status]) 100 return "unknown"; 101 102 return fcpio_status_str[status]; 103 } 104 105 static void fnic_cleanup_io(struct fnic *fnic); 106 107 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic, 108 struct scsi_cmnd *sc) 109 { 110 u32 hash = scsi_cmd_to_rq(sc)->tag & (FNIC_IO_LOCKS - 1); 111 112 return &fnic->io_req_lock[hash]; 113 } 114 115 static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic, 116 int tag) 117 { 118 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)]; 119 } 120 121 /* 122 * Unmap the data buffer and sense buffer for an io_req, 123 * also unmap and free the device-private scatter/gather list. 124 */ 125 static void fnic_release_ioreq_buf(struct fnic *fnic, 126 struct fnic_io_req *io_req, 127 struct scsi_cmnd *sc) 128 { 129 if (io_req->sgl_list_pa) 130 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 131 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, 132 DMA_TO_DEVICE); 133 scsi_dma_unmap(sc); 134 135 if (io_req->sgl_cnt) 136 mempool_free(io_req->sgl_list_alloc, 137 fnic->io_sgl_pool[io_req->sgl_type]); 138 if (io_req->sense_buf_pa) 139 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa, 140 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); 141 } 142 143 /* Free up Copy Wq descriptors. Called with copy_wq lock held */ 144 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq) 145 { 146 /* if no Ack received from firmware, then nothing to clean */ 147 if (!fnic->fw_ack_recd[0]) 148 return 1; 149 150 /* 151 * Update desc_available count based on number of freed descriptors 152 * Account for wraparound 153 */ 154 if (wq->to_clean_index <= fnic->fw_ack_index[0]) 155 wq->ring.desc_avail += (fnic->fw_ack_index[0] 156 - wq->to_clean_index + 1); 157 else 158 wq->ring.desc_avail += (wq->ring.desc_count 159 - wq->to_clean_index 160 + fnic->fw_ack_index[0] + 1); 161 162 /* 163 * just bump clean index to ack_index+1 accounting for wraparound 164 * this will essentially free up all descriptors between 165 * to_clean_index and fw_ack_index, both inclusive 166 */ 167 wq->to_clean_index = 168 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count; 169 170 /* we have processed the acks received so far */ 171 fnic->fw_ack_recd[0] = 0; 172 return 0; 173 } 174 175 176 /* 177 * __fnic_set_state_flags 178 * Sets/Clears bits in fnic's state_flags 179 **/ 180 void 181 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags, 182 unsigned long clearbits) 183 { 184 unsigned long flags = 0; 185 unsigned long host_lock_flags = 0; 186 187 spin_lock_irqsave(&fnic->fnic_lock, flags); 188 spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags); 189 190 if (clearbits) 191 fnic->state_flags &= ~st_flags; 192 else 193 fnic->state_flags |= st_flags; 194 195 spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags); 196 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 197 198 return; 199 } 200 201 202 /* 203 * fnic_fw_reset_handler 204 * Routine to send reset msg to fw 205 */ 206 int fnic_fw_reset_handler(struct fnic *fnic) 207 { 208 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 209 int ret = 0; 210 unsigned long flags; 211 212 /* indicate fwreset to io path */ 213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); 214 215 skb_queue_purge(&fnic->frame_queue); 216 skb_queue_purge(&fnic->tx_queue); 217 218 /* wait for io cmpl */ 219 while (atomic_read(&fnic->in_flight)) 220 schedule_timeout(msecs_to_jiffies(1)); 221 222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 223 224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 225 free_wq_copy_descs(fnic, wq); 226 227 if (!vnic_wq_copy_desc_avail(wq)) 228 ret = -EAGAIN; 229 else { 230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); 231 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 232 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 233 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 234 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 235 atomic64_read( 236 &fnic->fnic_stats.fw_stats.active_fw_reqs)); 237 } 238 239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 240 241 if (!ret) { 242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets); 243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 244 "Issued fw reset\n"); 245 } else { 246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 248 "Failed to issue fw reset\n"); 249 } 250 251 return ret; 252 } 253 254 255 /* 256 * fnic_flogi_reg_handler 257 * Routine to send flogi register msg to fw 258 */ 259 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) 260 { 261 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 262 enum fcpio_flogi_reg_format_type format; 263 struct fc_lport *lp = fnic->lport; 264 u8 gw_mac[ETH_ALEN]; 265 int ret = 0; 266 unsigned long flags; 267 268 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 269 270 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 271 free_wq_copy_descs(fnic, wq); 272 273 if (!vnic_wq_copy_desc_avail(wq)) { 274 ret = -EAGAIN; 275 goto flogi_reg_ioreq_end; 276 } 277 278 if (fnic->ctlr.map_dest) { 279 eth_broadcast_addr(gw_mac); 280 format = FCPIO_FLOGI_REG_DEF_DEST; 281 } else { 282 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); 283 format = FCPIO_FLOGI_REG_GW_DEST; 284 } 285 286 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { 287 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, 288 fc_id, gw_mac, 289 fnic->data_src_addr, 290 lp->r_a_tov, lp->e_d_tov); 291 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 292 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", 293 fc_id, fnic->data_src_addr, gw_mac); 294 } else { 295 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, 296 format, fc_id, gw_mac); 297 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 298 "FLOGI reg issued fcid %x map %d dest %pM\n", 299 fc_id, fnic->ctlr.map_dest, gw_mac); 300 } 301 302 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 303 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 304 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 305 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 306 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 307 308 flogi_reg_ioreq_end: 309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 310 return ret; 311 } 312 313 /* 314 * fnic_queue_wq_copy_desc 315 * Routine to enqueue a wq copy desc 316 */ 317 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, 318 struct vnic_wq_copy *wq, 319 struct fnic_io_req *io_req, 320 struct scsi_cmnd *sc, 321 int sg_count) 322 { 323 struct scatterlist *sg; 324 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); 325 struct fc_rport_libfc_priv *rp = rport->dd_data; 326 struct host_sg_desc *desc; 327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 328 unsigned int i; 329 unsigned long intr_flags; 330 int flags; 331 u8 exch_flags; 332 struct scsi_lun fc_lun; 333 334 if (sg_count) { 335 /* For each SGE, create a device desc entry */ 336 desc = io_req->sgl_list; 337 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 338 desc->addr = cpu_to_le64(sg_dma_address(sg)); 339 desc->len = cpu_to_le32(sg_dma_len(sg)); 340 desc->_resvd = 0; 341 desc++; 342 } 343 344 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev, 345 io_req->sgl_list, 346 sizeof(io_req->sgl_list[0]) * sg_count, 347 DMA_TO_DEVICE); 348 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) { 349 printk(KERN_ERR "DMA mapping failed\n"); 350 return SCSI_MLQUEUE_HOST_BUSY; 351 } 352 } 353 354 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev, 355 sc->sense_buffer, 356 SCSI_SENSE_BUFFERSIZE, 357 DMA_FROM_DEVICE); 358 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) { 359 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 360 sizeof(io_req->sgl_list[0]) * sg_count, 361 DMA_TO_DEVICE); 362 printk(KERN_ERR "DMA mapping failed\n"); 363 return SCSI_MLQUEUE_HOST_BUSY; 364 } 365 366 int_to_scsilun(sc->device->lun, &fc_lun); 367 368 /* Enqueue the descriptor in the Copy WQ */ 369 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 370 371 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 372 free_wq_copy_descs(fnic, wq); 373 374 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 375 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 376 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 377 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 378 atomic64_inc(&misc_stats->io_cpwq_alloc_failures); 379 return SCSI_MLQUEUE_HOST_BUSY; 380 } 381 382 flags = 0; 383 if (sc->sc_data_direction == DMA_FROM_DEVICE) 384 flags = FCPIO_ICMND_RDDATA; 385 else if (sc->sc_data_direction == DMA_TO_DEVICE) 386 flags = FCPIO_ICMND_WRDATA; 387 388 exch_flags = 0; 389 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 390 (rp->flags & FC_RP_FLAGS_RETRY)) 391 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 392 393 fnic_queue_wq_copy_desc_icmnd_16(wq, scsi_cmd_to_rq(sc)->tag, 394 0, exch_flags, io_req->sgl_cnt, 395 SCSI_SENSE_BUFFERSIZE, 396 io_req->sgl_list_pa, 397 io_req->sense_buf_pa, 398 0, /* scsi cmd ref, always 0 */ 399 FCPIO_ICMND_PTA_SIMPLE, 400 /* scsi pri and tag */ 401 flags, /* command flags */ 402 sc->cmnd, sc->cmd_len, 403 scsi_bufflen(sc), 404 fc_lun.scsi_lun, io_req->port_id, 405 rport->maxframe_size, rp->r_a_tov, 406 rp->e_d_tov); 407 408 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 409 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 410 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 411 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 412 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 413 414 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 415 return 0; 416 } 417 418 /* 419 * fnic_queuecommand 420 * Routine to send a scsi cdb 421 * Called with host_lock held and interrupts disabled. 422 */ 423 static int fnic_queuecommand_lck(struct scsi_cmnd *sc) 424 { 425 void (*done)(struct scsi_cmnd *) = scsi_done; 426 const int tag = scsi_cmd_to_rq(sc)->tag; 427 struct fc_lport *lp = shost_priv(sc->device->host); 428 struct fc_rport *rport; 429 struct fnic_io_req *io_req = NULL; 430 struct fnic *fnic = lport_priv(lp); 431 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 432 struct vnic_wq_copy *wq; 433 int ret; 434 u64 cmd_trace; 435 int sg_count = 0; 436 unsigned long flags = 0; 437 unsigned long ptr; 438 spinlock_t *io_lock = NULL; 439 int io_lock_acquired = 0; 440 struct fc_rport_libfc_priv *rp; 441 442 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 443 return SCSI_MLQUEUE_HOST_BUSY; 444 445 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) 446 return SCSI_MLQUEUE_HOST_BUSY; 447 448 rport = starget_to_rport(scsi_target(sc->device)); 449 if (!rport) { 450 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 451 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 452 sc->result = DID_NO_CONNECT << 16; 453 done(sc); 454 return 0; 455 } 456 457 ret = fc_remote_port_chkready(rport); 458 if (ret) { 459 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 460 "rport is not ready\n"); 461 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 462 sc->result = ret; 463 done(sc); 464 return 0; 465 } 466 467 rp = rport->dd_data; 468 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 469 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 470 "rport 0x%x removed, returning DID_NO_CONNECT\n", 471 rport->port_id); 472 473 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 474 sc->result = DID_NO_CONNECT<<16; 475 done(sc); 476 return 0; 477 } 478 479 if (rp->rp_state != RPORT_ST_READY) { 480 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 481 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 482 rport->port_id, rp->rp_state); 483 484 sc->result = DID_IMM_RETRY << 16; 485 done(sc); 486 return 0; 487 } 488 489 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 490 return SCSI_MLQUEUE_HOST_BUSY; 491 492 atomic_inc(&fnic->in_flight); 493 494 /* 495 * Release host lock, use driver resource specific locks from here. 496 * Don't re-enable interrupts in case they were disabled prior to the 497 * caller disabling them. 498 */ 499 spin_unlock(lp->host->host_lock); 500 fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED; 501 fnic_priv(sc)->flags = FNIC_NO_FLAGS; 502 503 /* Get a new io_req for this SCSI IO */ 504 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 505 if (!io_req) { 506 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 507 ret = SCSI_MLQUEUE_HOST_BUSY; 508 goto out; 509 } 510 memset(io_req, 0, sizeof(*io_req)); 511 512 /* Map the data buffer */ 513 sg_count = scsi_dma_map(sc); 514 if (sg_count < 0) { 515 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 516 tag, sc, 0, sc->cmnd[0], sg_count, fnic_priv(sc)->state); 517 mempool_free(io_req, fnic->io_req_pool); 518 goto out; 519 } 520 521 /* Determine the type of scatter/gather list we need */ 522 io_req->sgl_cnt = sg_count; 523 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 524 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 525 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 526 527 if (sg_count) { 528 io_req->sgl_list = 529 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 530 GFP_ATOMIC); 531 if (!io_req->sgl_list) { 532 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 533 ret = SCSI_MLQUEUE_HOST_BUSY; 534 scsi_dma_unmap(sc); 535 mempool_free(io_req, fnic->io_req_pool); 536 goto out; 537 } 538 539 /* Cache sgl list allocated address before alignment */ 540 io_req->sgl_list_alloc = io_req->sgl_list; 541 ptr = (unsigned long) io_req->sgl_list; 542 if (ptr % FNIC_SG_DESC_ALIGN) { 543 io_req->sgl_list = (struct host_sg_desc *) 544 (((unsigned long) ptr 545 + FNIC_SG_DESC_ALIGN - 1) 546 & ~(FNIC_SG_DESC_ALIGN - 1)); 547 } 548 } 549 550 /* 551 * Will acquire lock defore setting to IO initialized. 552 */ 553 554 io_lock = fnic_io_lock_hash(fnic, sc); 555 spin_lock_irqsave(io_lock, flags); 556 557 /* initialize rest of io_req */ 558 io_lock_acquired = 1; 559 io_req->port_id = rport->port_id; 560 io_req->start_time = jiffies; 561 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING; 562 fnic_priv(sc)->io_req = io_req; 563 fnic_priv(sc)->flags |= FNIC_IO_INITIALIZED; 564 565 /* create copy wq desc and enqueue it */ 566 wq = &fnic->wq_copy[0]; 567 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 568 if (ret) { 569 /* 570 * In case another thread cancelled the request, 571 * refetch the pointer under the lock. 572 */ 573 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 574 tag, sc, 0, 0, 0, fnic_flags_and_state(sc)); 575 io_req = fnic_priv(sc)->io_req; 576 fnic_priv(sc)->io_req = NULL; 577 fnic_priv(sc)->state = 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 fnic_priv(sc)->flags |= 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 tag, sc, io_req, sg_count, cmd_trace, 606 fnic_flags_and_state(sc)); 607 608 /* if only we issued IO, will we have the io lock */ 609 if (io_lock_acquired) 610 spin_unlock_irqrestore(io_lock, flags); 611 612 atomic_dec(&fnic->in_flight); 613 /* acquire host lock before returning to SCSI */ 614 spin_lock(lp->host->host_lock); 615 return ret; 616 } 617 618 DEF_SCSI_QCMD(fnic_queuecommand) 619 620 /* 621 * fnic_fcpio_fw_reset_cmpl_handler 622 * Routine to handle fw reset completion 623 */ 624 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 625 struct fcpio_fw_req *desc) 626 { 627 u8 type; 628 u8 hdr_status; 629 struct fcpio_tag tag; 630 int ret = 0; 631 unsigned long flags; 632 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 633 634 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 635 636 atomic64_inc(&reset_stats->fw_reset_completions); 637 638 /* Clean up all outstanding io requests */ 639 fnic_cleanup_io(fnic); 640 641 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 642 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 643 atomic64_set(&fnic->io_cmpl_skip, 0); 644 645 spin_lock_irqsave(&fnic->fnic_lock, flags); 646 647 /* fnic should be in FC_TRANS_ETH_MODE */ 648 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 649 /* Check status of reset completion */ 650 if (!hdr_status) { 651 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 652 "reset cmpl success\n"); 653 /* Ready to send flogi out */ 654 fnic->state = FNIC_IN_ETH_MODE; 655 } else { 656 FNIC_SCSI_DBG(KERN_DEBUG, 657 fnic->lport->host, 658 "fnic fw_reset : failed %s\n", 659 fnic_fcpio_status_to_str(hdr_status)); 660 661 /* 662 * Unable to change to eth mode, cannot send out flogi 663 * Change state to fc mode, so that subsequent Flogi 664 * requests from libFC will cause more attempts to 665 * reset the firmware. Free the cached flogi 666 */ 667 fnic->state = FNIC_IN_FC_MODE; 668 atomic64_inc(&reset_stats->fw_reset_failures); 669 ret = -1; 670 } 671 } else { 672 FNIC_SCSI_DBG(KERN_DEBUG, 673 fnic->lport->host, 674 "Unexpected state %s while processing" 675 " reset cmpl\n", fnic_state_to_str(fnic->state)); 676 atomic64_inc(&reset_stats->fw_reset_failures); 677 ret = -1; 678 } 679 680 /* Thread removing device blocks till firmware reset is complete */ 681 if (fnic->remove_wait) 682 complete(fnic->remove_wait); 683 684 /* 685 * If fnic is being removed, or fw reset failed 686 * free the flogi frame. Else, send it out 687 */ 688 if (fnic->remove_wait || ret) { 689 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 690 skb_queue_purge(&fnic->tx_queue); 691 goto reset_cmpl_handler_end; 692 } 693 694 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 695 696 fnic_flush_tx(fnic); 697 698 reset_cmpl_handler_end: 699 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 700 701 return ret; 702 } 703 704 /* 705 * fnic_fcpio_flogi_reg_cmpl_handler 706 * Routine to handle flogi register completion 707 */ 708 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 709 struct fcpio_fw_req *desc) 710 { 711 u8 type; 712 u8 hdr_status; 713 struct fcpio_tag tag; 714 int ret = 0; 715 unsigned long flags; 716 717 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 718 719 /* Update fnic state based on status of flogi reg completion */ 720 spin_lock_irqsave(&fnic->fnic_lock, flags); 721 722 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 723 724 /* Check flogi registration completion status */ 725 if (!hdr_status) { 726 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 727 "flog reg succeeded\n"); 728 fnic->state = FNIC_IN_FC_MODE; 729 } else { 730 FNIC_SCSI_DBG(KERN_DEBUG, 731 fnic->lport->host, 732 "fnic flogi reg :failed %s\n", 733 fnic_fcpio_status_to_str(hdr_status)); 734 fnic->state = FNIC_IN_ETH_MODE; 735 ret = -1; 736 } 737 } else { 738 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 739 "Unexpected fnic state %s while" 740 " processing flogi reg completion\n", 741 fnic_state_to_str(fnic->state)); 742 ret = -1; 743 } 744 745 if (!ret) { 746 if (fnic->stop_rx_link_events) { 747 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 748 goto reg_cmpl_handler_end; 749 } 750 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 751 752 fnic_flush_tx(fnic); 753 queue_work(fnic_event_queue, &fnic->frame_work); 754 } else { 755 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 756 } 757 758 reg_cmpl_handler_end: 759 return ret; 760 } 761 762 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 763 u16 request_out) 764 { 765 if (wq->to_clean_index <= wq->to_use_index) { 766 /* out of range, stale request_out index */ 767 if (request_out < wq->to_clean_index || 768 request_out >= wq->to_use_index) 769 return 0; 770 } else { 771 /* out of range, stale request_out index */ 772 if (request_out < wq->to_clean_index && 773 request_out >= wq->to_use_index) 774 return 0; 775 } 776 /* request_out index is in range */ 777 return 1; 778 } 779 780 781 /* 782 * Mark that ack received and store the Ack index. If there are multiple 783 * acks received before Tx thread cleans it up, the latest value will be 784 * used which is correct behavior. This state should be in the copy Wq 785 * instead of in the fnic 786 */ 787 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 788 unsigned int cq_index, 789 struct fcpio_fw_req *desc) 790 { 791 struct vnic_wq_copy *wq; 792 u16 request_out = desc->u.ack.request_out; 793 unsigned long flags; 794 u64 *ox_id_tag = (u64 *)(void *)desc; 795 796 /* mark the ack state */ 797 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 798 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 799 800 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 801 if (is_ack_index_in_range(wq, request_out)) { 802 fnic->fw_ack_index[0] = request_out; 803 fnic->fw_ack_recd[0] = 1; 804 } else 805 atomic64_inc( 806 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 807 808 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 809 FNIC_TRACE(fnic_fcpio_ack_handler, 810 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 811 ox_id_tag[4], ox_id_tag[5]); 812 } 813 814 /* 815 * fnic_fcpio_icmnd_cmpl_handler 816 * Routine to handle icmnd completions 817 */ 818 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 819 struct fcpio_fw_req *desc) 820 { 821 u8 type; 822 u8 hdr_status; 823 struct fcpio_tag tag; 824 u32 id; 825 u64 xfer_len = 0; 826 struct fcpio_icmnd_cmpl *icmnd_cmpl; 827 struct fnic_io_req *io_req; 828 struct scsi_cmnd *sc; 829 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 830 unsigned long flags; 831 spinlock_t *io_lock; 832 u64 cmd_trace; 833 unsigned long start_time; 834 unsigned long io_duration_time; 835 836 /* Decode the cmpl description to get the io_req id */ 837 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 838 fcpio_tag_id_dec(&tag, &id); 839 icmnd_cmpl = &desc->u.icmnd_cmpl; 840 841 if (id >= fnic->fnic_max_tag_id) { 842 shost_printk(KERN_ERR, fnic->lport->host, 843 "Tag out of range tag %x hdr status = %s\n", 844 id, fnic_fcpio_status_to_str(hdr_status)); 845 return; 846 } 847 848 sc = scsi_host_find_tag(fnic->lport->host, id); 849 WARN_ON_ONCE(!sc); 850 if (!sc) { 851 atomic64_inc(&fnic_stats->io_stats.sc_null); 852 shost_printk(KERN_ERR, fnic->lport->host, 853 "icmnd_cmpl sc is null - " 854 "hdr status = %s tag = 0x%x desc = 0x%p\n", 855 fnic_fcpio_status_to_str(hdr_status), id, desc); 856 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 857 fnic->lport->host->host_no, id, 858 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 859 (u64)icmnd_cmpl->_resvd0[0]), 860 ((u64)hdr_status << 16 | 861 (u64)icmnd_cmpl->scsi_status << 8 | 862 (u64)icmnd_cmpl->flags), desc, 863 (u64)icmnd_cmpl->residual, 0); 864 return; 865 } 866 867 io_lock = fnic_io_lock_hash(fnic, sc); 868 spin_lock_irqsave(io_lock, flags); 869 io_req = fnic_priv(sc)->io_req; 870 WARN_ON_ONCE(!io_req); 871 if (!io_req) { 872 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 873 fnic_priv(sc)->flags |= FNIC_IO_REQ_NULL; 874 spin_unlock_irqrestore(io_lock, flags); 875 shost_printk(KERN_ERR, fnic->lport->host, 876 "icmnd_cmpl io_req is null - " 877 "hdr status = %s tag = 0x%x sc 0x%p\n", 878 fnic_fcpio_status_to_str(hdr_status), id, sc); 879 return; 880 } 881 start_time = io_req->start_time; 882 883 /* firmware completed the io */ 884 io_req->io_completed = 1; 885 886 /* 887 * if SCSI-ML has already issued abort on this command, 888 * set completion of the IO. The abts path will clean it up 889 */ 890 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 891 892 /* 893 * set the FNIC_IO_DONE so that this doesn't get 894 * flagged as 'out of order' if it was not aborted 895 */ 896 fnic_priv(sc)->flags |= FNIC_IO_DONE; 897 fnic_priv(sc)->flags |= FNIC_IO_ABTS_PENDING; 898 spin_unlock_irqrestore(io_lock, flags); 899 if(FCPIO_ABORTED == hdr_status) 900 fnic_priv(sc)->flags |= FNIC_IO_ABORTED; 901 902 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 903 "icmnd_cmpl abts pending " 904 "hdr status = %s tag = 0x%x sc = 0x%p " 905 "scsi_status = %x residual = %d\n", 906 fnic_fcpio_status_to_str(hdr_status), 907 id, sc, 908 icmnd_cmpl->scsi_status, 909 icmnd_cmpl->residual); 910 return; 911 } 912 913 /* Mark the IO as complete */ 914 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 915 916 icmnd_cmpl = &desc->u.icmnd_cmpl; 917 918 switch (hdr_status) { 919 case FCPIO_SUCCESS: 920 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 921 xfer_len = scsi_bufflen(sc); 922 923 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) { 924 xfer_len -= icmnd_cmpl->residual; 925 scsi_set_resid(sc, icmnd_cmpl->residual); 926 } 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 fnic_priv(sc)->io_req = NULL; 986 fnic_priv(sc)->flags |= FNIC_IO_DONE; 987 988 if (hdr_status != FCPIO_SUCCESS) { 989 atomic64_inc(&fnic_stats->io_stats.io_failures); 990 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 991 fnic_fcpio_status_to_str(hdr_status)); 992 } 993 994 fnic_release_ioreq_buf(fnic, io_req, sc); 995 996 cmd_trace = ((u64)hdr_status << 56) | 997 (u64)icmnd_cmpl->scsi_status << 48 | 998 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 999 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1000 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 1001 1002 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 1003 sc->device->host->host_no, id, sc, 1004 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1005 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1006 jiffies_to_msecs(jiffies - start_time)), 1007 desc, cmd_trace, fnic_flags_and_state(sc)); 1008 1009 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1010 fnic->lport->host_stats.fcp_input_requests++; 1011 fnic->fcp_input_bytes += xfer_len; 1012 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1013 fnic->lport->host_stats.fcp_output_requests++; 1014 fnic->fcp_output_bytes += xfer_len; 1015 } else 1016 fnic->lport->host_stats.fcp_control_requests++; 1017 1018 /* Call SCSI completion function to complete the IO */ 1019 scsi_done(sc); 1020 spin_unlock_irqrestore(io_lock, flags); 1021 1022 mempool_free(io_req, fnic->io_req_pool); 1023 1024 atomic64_dec(&fnic_stats->io_stats.active_ios); 1025 if (atomic64_read(&fnic->io_cmpl_skip)) 1026 atomic64_dec(&fnic->io_cmpl_skip); 1027 else 1028 atomic64_inc(&fnic_stats->io_stats.io_completions); 1029 1030 1031 io_duration_time = jiffies_to_msecs(jiffies) - 1032 jiffies_to_msecs(start_time); 1033 1034 if(io_duration_time <= 10) 1035 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1036 else if(io_duration_time <= 100) 1037 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1038 else if(io_duration_time <= 500) 1039 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1040 else if(io_duration_time <= 5000) 1041 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1042 else if(io_duration_time <= 10000) 1043 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1044 else if(io_duration_time <= 30000) 1045 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1046 else { 1047 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1048 1049 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1050 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1051 } 1052 } 1053 1054 /* fnic_fcpio_itmf_cmpl_handler 1055 * Routine to handle itmf completions 1056 */ 1057 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1058 struct fcpio_fw_req *desc) 1059 { 1060 u8 type; 1061 u8 hdr_status; 1062 struct fcpio_tag tag; 1063 u32 id; 1064 struct scsi_cmnd *sc; 1065 struct fnic_io_req *io_req; 1066 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1067 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1068 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1069 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1070 unsigned long flags; 1071 spinlock_t *io_lock; 1072 unsigned long start_time; 1073 1074 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1075 fcpio_tag_id_dec(&tag, &id); 1076 1077 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1078 shost_printk(KERN_ERR, fnic->lport->host, 1079 "Tag out of range tag %x hdr status = %s\n", 1080 id, fnic_fcpio_status_to_str(hdr_status)); 1081 return; 1082 } 1083 1084 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1085 WARN_ON_ONCE(!sc); 1086 if (!sc) { 1087 atomic64_inc(&fnic_stats->io_stats.sc_null); 1088 shost_printk(KERN_ERR, fnic->lport->host, 1089 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1090 fnic_fcpio_status_to_str(hdr_status), id); 1091 return; 1092 } 1093 io_lock = fnic_io_lock_hash(fnic, sc); 1094 spin_lock_irqsave(io_lock, flags); 1095 io_req = fnic_priv(sc)->io_req; 1096 WARN_ON_ONCE(!io_req); 1097 if (!io_req) { 1098 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1099 spin_unlock_irqrestore(io_lock, flags); 1100 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 1101 shost_printk(KERN_ERR, fnic->lport->host, 1102 "itmf_cmpl io_req is null - " 1103 "hdr status = %s tag = 0x%x sc 0x%p\n", 1104 fnic_fcpio_status_to_str(hdr_status), id, sc); 1105 return; 1106 } 1107 start_time = io_req->start_time; 1108 1109 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1110 /* Abort and terminate completion of device reset req */ 1111 /* REVISIT : Add asserts about various flags */ 1112 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1113 "dev reset abts cmpl recd. id %x status %s\n", 1114 id, fnic_fcpio_status_to_str(hdr_status)); 1115 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 1116 fnic_priv(sc)->abts_status = hdr_status; 1117 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1118 if (io_req->abts_done) 1119 complete(io_req->abts_done); 1120 spin_unlock_irqrestore(io_lock, flags); 1121 } else if (id & FNIC_TAG_ABORT) { 1122 /* Completion of abort cmd */ 1123 switch (hdr_status) { 1124 case FCPIO_SUCCESS: 1125 break; 1126 case FCPIO_TIMEOUT: 1127 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1128 atomic64_inc(&abts_stats->abort_fw_timeouts); 1129 else 1130 atomic64_inc( 1131 &term_stats->terminate_fw_timeouts); 1132 break; 1133 case FCPIO_ITMF_REJECTED: 1134 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1135 "abort reject recd. id %d\n", 1136 (int)(id & FNIC_TAG_MASK)); 1137 break; 1138 case FCPIO_IO_NOT_FOUND: 1139 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1140 atomic64_inc(&abts_stats->abort_io_not_found); 1141 else 1142 atomic64_inc( 1143 &term_stats->terminate_io_not_found); 1144 break; 1145 default: 1146 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1147 atomic64_inc(&abts_stats->abort_failures); 1148 else 1149 atomic64_inc( 1150 &term_stats->terminate_failures); 1151 break; 1152 } 1153 if (fnic_priv(sc)->state != FNIC_IOREQ_ABTS_PENDING) { 1154 /* This is a late completion. Ignore it */ 1155 spin_unlock_irqrestore(io_lock, flags); 1156 return; 1157 } 1158 1159 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE; 1160 fnic_priv(sc)->abts_status = hdr_status; 1161 1162 /* If the status is IO not found consider it as success */ 1163 if (hdr_status == FCPIO_IO_NOT_FOUND) 1164 fnic_priv(sc)->abts_status = FCPIO_SUCCESS; 1165 1166 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1167 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1168 1169 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1170 "abts cmpl recd. id %d status %s\n", 1171 (int)(id & FNIC_TAG_MASK), 1172 fnic_fcpio_status_to_str(hdr_status)); 1173 1174 /* 1175 * If scsi_eh thread is blocked waiting for abts to complete, 1176 * signal completion to it. IO will be cleaned in the thread 1177 * else clean it in this context 1178 */ 1179 if (io_req->abts_done) { 1180 complete(io_req->abts_done); 1181 spin_unlock_irqrestore(io_lock, flags); 1182 } else { 1183 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1184 "abts cmpl, completing IO\n"); 1185 fnic_priv(sc)->io_req = NULL; 1186 sc->result = (DID_ERROR << 16); 1187 1188 spin_unlock_irqrestore(io_lock, flags); 1189 1190 fnic_release_ioreq_buf(fnic, io_req, sc); 1191 mempool_free(io_req, fnic->io_req_pool); 1192 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1193 sc->device->host->host_no, id, 1194 sc, 1195 jiffies_to_msecs(jiffies - start_time), 1196 desc, 1197 (((u64)hdr_status << 40) | 1198 (u64)sc->cmnd[0] << 32 | 1199 (u64)sc->cmnd[2] << 24 | 1200 (u64)sc->cmnd[3] << 16 | 1201 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1202 fnic_flags_and_state(sc)); 1203 scsi_done(sc); 1204 atomic64_dec(&fnic_stats->io_stats.active_ios); 1205 if (atomic64_read(&fnic->io_cmpl_skip)) 1206 atomic64_dec(&fnic->io_cmpl_skip); 1207 else 1208 atomic64_inc(&fnic_stats->io_stats.io_completions); 1209 } 1210 } else if (id & FNIC_TAG_DEV_RST) { 1211 /* Completion of device reset */ 1212 fnic_priv(sc)->lr_status = hdr_status; 1213 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1214 spin_unlock_irqrestore(io_lock, flags); 1215 fnic_priv(sc)->flags |= FNIC_DEV_RST_ABTS_PENDING; 1216 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1217 sc->device->host->host_no, id, sc, 1218 jiffies_to_msecs(jiffies - start_time), 1219 desc, 0, fnic_flags_and_state(sc)); 1220 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1221 "Terminate pending " 1222 "dev reset cmpl recd. id %d status %s\n", 1223 (int)(id & FNIC_TAG_MASK), 1224 fnic_fcpio_status_to_str(hdr_status)); 1225 return; 1226 } 1227 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TIMED_OUT) { 1228 /* Need to wait for terminate completion */ 1229 spin_unlock_irqrestore(io_lock, flags); 1230 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1231 sc->device->host->host_no, id, sc, 1232 jiffies_to_msecs(jiffies - start_time), 1233 desc, 0, fnic_flags_and_state(sc)); 1234 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1235 "dev reset cmpl recd after time out. " 1236 "id %d status %s\n", 1237 (int)(id & FNIC_TAG_MASK), 1238 fnic_fcpio_status_to_str(hdr_status)); 1239 return; 1240 } 1241 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 1242 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1244 "dev reset cmpl recd. id %d status %s\n", 1245 (int)(id & FNIC_TAG_MASK), 1246 fnic_fcpio_status_to_str(hdr_status)); 1247 if (io_req->dr_done) 1248 complete(io_req->dr_done); 1249 spin_unlock_irqrestore(io_lock, flags); 1250 1251 } else { 1252 shost_printk(KERN_ERR, fnic->lport->host, 1253 "Unexpected itmf io state %s tag %x\n", 1254 fnic_ioreq_state_to_str(fnic_priv(sc)->state), id); 1255 spin_unlock_irqrestore(io_lock, flags); 1256 } 1257 1258 } 1259 1260 /* 1261 * fnic_fcpio_cmpl_handler 1262 * Routine to service the cq for wq_copy 1263 */ 1264 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1265 unsigned int cq_index, 1266 struct fcpio_fw_req *desc) 1267 { 1268 struct fnic *fnic = vnic_dev_priv(vdev); 1269 1270 switch (desc->hdr.type) { 1271 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1272 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1273 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1274 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1275 case FCPIO_RESET_CMPL: /* fw completed reset */ 1276 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1277 break; 1278 default: 1279 break; 1280 } 1281 1282 switch (desc->hdr.type) { 1283 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1284 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1285 break; 1286 1287 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1288 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1289 break; 1290 1291 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1292 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1293 break; 1294 1295 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1296 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1297 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1298 break; 1299 1300 case FCPIO_RESET_CMPL: /* fw completed reset */ 1301 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1302 break; 1303 1304 default: 1305 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1306 "firmware completion type %d\n", 1307 desc->hdr.type); 1308 break; 1309 } 1310 1311 return 0; 1312 } 1313 1314 /* 1315 * fnic_wq_copy_cmpl_handler 1316 * Routine to process wq copy 1317 */ 1318 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1319 { 1320 unsigned int wq_work_done = 0; 1321 unsigned int i, cq_index; 1322 unsigned int cur_work_done; 1323 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1324 u64 start_jiffies = 0; 1325 u64 end_jiffies = 0; 1326 u64 delta_jiffies = 0; 1327 u64 delta_ms = 0; 1328 1329 for (i = 0; i < fnic->wq_copy_count; i++) { 1330 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1331 1332 start_jiffies = jiffies; 1333 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1334 fnic_fcpio_cmpl_handler, 1335 copy_work_to_do); 1336 end_jiffies = jiffies; 1337 1338 wq_work_done += cur_work_done; 1339 delta_jiffies = end_jiffies - start_jiffies; 1340 if (delta_jiffies > 1341 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { 1342 atomic64_set(&misc_stats->max_isr_jiffies, 1343 delta_jiffies); 1344 delta_ms = jiffies_to_msecs(delta_jiffies); 1345 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); 1346 atomic64_set(&misc_stats->corr_work_done, 1347 cur_work_done); 1348 } 1349 } 1350 return wq_work_done; 1351 } 1352 1353 static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data, 1354 bool reserved) 1355 { 1356 const int tag = scsi_cmd_to_rq(sc)->tag; 1357 struct fnic *fnic = data; 1358 struct fnic_io_req *io_req; 1359 unsigned long flags = 0; 1360 spinlock_t *io_lock; 1361 unsigned long start_time = 0; 1362 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1363 1364 io_lock = fnic_io_lock_tag(fnic, tag); 1365 spin_lock_irqsave(io_lock, flags); 1366 1367 io_req = fnic_priv(sc)->io_req; 1368 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 1369 !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { 1370 /* 1371 * We will be here only when FW completes reset 1372 * without sending completions for outstanding ios. 1373 */ 1374 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1375 if (io_req && io_req->dr_done) 1376 complete(io_req->dr_done); 1377 else if (io_req && io_req->abts_done) 1378 complete(io_req->abts_done); 1379 spin_unlock_irqrestore(io_lock, flags); 1380 return true; 1381 } else if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 1382 spin_unlock_irqrestore(io_lock, flags); 1383 return true; 1384 } 1385 if (!io_req) { 1386 spin_unlock_irqrestore(io_lock, flags); 1387 goto cleanup_scsi_cmd; 1388 } 1389 1390 fnic_priv(sc)->io_req = NULL; 1391 1392 spin_unlock_irqrestore(io_lock, flags); 1393 1394 /* 1395 * If there is a scsi_cmnd associated with this io_req, then 1396 * free the corresponding state 1397 */ 1398 start_time = io_req->start_time; 1399 fnic_release_ioreq_buf(fnic, io_req, sc); 1400 mempool_free(io_req, fnic->io_req_pool); 1401 1402 cleanup_scsi_cmd: 1403 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1404 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1405 "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", 1406 tag, sc, jiffies - start_time); 1407 1408 if (atomic64_read(&fnic->io_cmpl_skip)) 1409 atomic64_dec(&fnic->io_cmpl_skip); 1410 else 1411 atomic64_inc(&fnic_stats->io_stats.io_completions); 1412 1413 /* Complete the command to SCSI */ 1414 if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) 1415 shost_printk(KERN_ERR, fnic->lport->host, 1416 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", 1417 tag, sc); 1418 1419 FNIC_TRACE(fnic_cleanup_io, 1420 sc->device->host->host_no, tag, sc, 1421 jiffies_to_msecs(jiffies - start_time), 1422 0, ((u64)sc->cmnd[0] << 32 | 1423 (u64)sc->cmnd[2] << 24 | 1424 (u64)sc->cmnd[3] << 16 | 1425 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1426 fnic_flags_and_state(sc)); 1427 1428 scsi_done(sc); 1429 1430 return true; 1431 } 1432 1433 static void fnic_cleanup_io(struct fnic *fnic) 1434 { 1435 scsi_host_busy_iter(fnic->lport->host, 1436 fnic_cleanup_io_iter, fnic); 1437 } 1438 1439 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1440 struct fcpio_host_req *desc) 1441 { 1442 u32 id; 1443 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1444 struct fnic_io_req *io_req; 1445 struct scsi_cmnd *sc; 1446 unsigned long flags; 1447 spinlock_t *io_lock; 1448 unsigned long start_time = 0; 1449 1450 /* get the tag reference */ 1451 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1452 id &= FNIC_TAG_MASK; 1453 1454 if (id >= fnic->fnic_max_tag_id) 1455 return; 1456 1457 sc = scsi_host_find_tag(fnic->lport->host, id); 1458 if (!sc) 1459 return; 1460 1461 io_lock = fnic_io_lock_hash(fnic, sc); 1462 spin_lock_irqsave(io_lock, flags); 1463 1464 /* Get the IO context which this desc refers to */ 1465 io_req = fnic_priv(sc)->io_req; 1466 1467 /* fnic interrupts are turned off by now */ 1468 1469 if (!io_req) { 1470 spin_unlock_irqrestore(io_lock, flags); 1471 goto wq_copy_cleanup_scsi_cmd; 1472 } 1473 1474 fnic_priv(sc)->io_req = NULL; 1475 1476 spin_unlock_irqrestore(io_lock, flags); 1477 1478 start_time = io_req->start_time; 1479 fnic_release_ioreq_buf(fnic, io_req, sc); 1480 mempool_free(io_req, fnic->io_req_pool); 1481 1482 wq_copy_cleanup_scsi_cmd: 1483 sc->result = DID_NO_CONNECT << 16; 1484 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1485 " DID_NO_CONNECT\n"); 1486 1487 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1488 sc->device->host->host_no, id, sc, 1489 jiffies_to_msecs(jiffies - start_time), 1490 0, ((u64)sc->cmnd[0] << 32 | 1491 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1492 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1493 fnic_flags_and_state(sc)); 1494 1495 scsi_done(sc); 1496 } 1497 1498 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1499 u32 task_req, u8 *fc_lun, 1500 struct fnic_io_req *io_req) 1501 { 1502 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1503 struct Scsi_Host *host = fnic->lport->host; 1504 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1505 unsigned long flags; 1506 1507 spin_lock_irqsave(host->host_lock, flags); 1508 if (unlikely(fnic_chk_state_flags_locked(fnic, 1509 FNIC_FLAGS_IO_BLOCKED))) { 1510 spin_unlock_irqrestore(host->host_lock, flags); 1511 return 1; 1512 } else 1513 atomic_inc(&fnic->in_flight); 1514 spin_unlock_irqrestore(host->host_lock, flags); 1515 1516 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1517 1518 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1519 free_wq_copy_descs(fnic, wq); 1520 1521 if (!vnic_wq_copy_desc_avail(wq)) { 1522 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1523 atomic_dec(&fnic->in_flight); 1524 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1525 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1526 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1527 return 1; 1528 } 1529 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1530 0, task_req, tag, fc_lun, io_req->port_id, 1531 fnic->config.ra_tov, fnic->config.ed_tov); 1532 1533 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1534 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1535 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1536 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1537 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1538 1539 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1540 atomic_dec(&fnic->in_flight); 1541 1542 return 0; 1543 } 1544 1545 struct fnic_rport_abort_io_iter_data { 1546 struct fnic *fnic; 1547 u32 port_id; 1548 int term_cnt; 1549 }; 1550 1551 static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data, 1552 bool reserved) 1553 { 1554 struct fnic_rport_abort_io_iter_data *iter_data = data; 1555 struct fnic *fnic = iter_data->fnic; 1556 int abt_tag = scsi_cmd_to_rq(sc)->tag; 1557 struct fnic_io_req *io_req; 1558 spinlock_t *io_lock; 1559 unsigned long flags; 1560 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1561 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1562 struct scsi_lun fc_lun; 1563 enum fnic_ioreq_state old_ioreq_state; 1564 1565 io_lock = fnic_io_lock_tag(fnic, abt_tag); 1566 spin_lock_irqsave(io_lock, flags); 1567 1568 io_req = fnic_priv(sc)->io_req; 1569 1570 if (!io_req || io_req->port_id != iter_data->port_id) { 1571 spin_unlock_irqrestore(io_lock, flags); 1572 return true; 1573 } 1574 1575 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 1576 !(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED)) { 1577 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1578 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1579 sc); 1580 spin_unlock_irqrestore(io_lock, flags); 1581 return true; 1582 } 1583 1584 /* 1585 * Found IO that is still pending with firmware and 1586 * belongs to rport that went away 1587 */ 1588 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1589 spin_unlock_irqrestore(io_lock, flags); 1590 return true; 1591 } 1592 if (io_req->abts_done) { 1593 shost_printk(KERN_ERR, fnic->lport->host, 1594 "fnic_rport_exch_reset: io_req->abts_done is set " 1595 "state is %s\n", 1596 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 1597 } 1598 1599 if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) { 1600 shost_printk(KERN_ERR, fnic->lport->host, 1601 "rport_exch_reset " 1602 "IO not yet issued %p tag 0x%x flags " 1603 "%x state %d\n", 1604 sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state); 1605 } 1606 old_ioreq_state = fnic_priv(sc)->state; 1607 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 1608 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 1609 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 1610 atomic64_inc(&reset_stats->device_reset_terminates); 1611 abt_tag |= FNIC_TAG_DEV_RST; 1612 } 1613 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1614 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); 1615 BUG_ON(io_req->abts_done); 1616 1617 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1618 "fnic_rport_reset_exch: Issuing abts\n"); 1619 1620 spin_unlock_irqrestore(io_lock, flags); 1621 1622 /* Now queue the abort command to firmware */ 1623 int_to_scsilun(sc->device->lun, &fc_lun); 1624 1625 if (fnic_queue_abort_io_req(fnic, abt_tag, 1626 FCPIO_ITMF_ABT_TASK_TERM, 1627 fc_lun.scsi_lun, io_req)) { 1628 /* 1629 * Revert the cmd state back to old state, if 1630 * it hasn't changed in between. This cmd will get 1631 * aborted later by scsi_eh, or cleaned up during 1632 * lun reset 1633 */ 1634 spin_lock_irqsave(io_lock, flags); 1635 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 1636 fnic_priv(sc)->state = old_ioreq_state; 1637 spin_unlock_irqrestore(io_lock, flags); 1638 } else { 1639 spin_lock_irqsave(io_lock, flags); 1640 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) 1641 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 1642 else 1643 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED; 1644 spin_unlock_irqrestore(io_lock, flags); 1645 atomic64_inc(&term_stats->terminates); 1646 iter_data->term_cnt++; 1647 } 1648 return true; 1649 } 1650 1651 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1652 { 1653 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1654 struct fnic_rport_abort_io_iter_data iter_data = { 1655 .fnic = fnic, 1656 .port_id = port_id, 1657 .term_cnt = 0, 1658 }; 1659 1660 FNIC_SCSI_DBG(KERN_DEBUG, 1661 fnic->lport->host, 1662 "fnic_rport_exch_reset called portid 0x%06x\n", 1663 port_id); 1664 1665 if (fnic->in_remove) 1666 return; 1667 1668 scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter, 1669 &iter_data); 1670 if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates)) 1671 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt); 1672 1673 } 1674 1675 void fnic_terminate_rport_io(struct fc_rport *rport) 1676 { 1677 struct fc_rport_libfc_priv *rdata; 1678 struct fc_lport *lport; 1679 struct fnic *fnic; 1680 1681 if (!rport) { 1682 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1683 return; 1684 } 1685 rdata = rport->dd_data; 1686 1687 if (!rdata) { 1688 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1689 return; 1690 } 1691 lport = rdata->local_port; 1692 1693 if (!lport) { 1694 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1695 return; 1696 } 1697 fnic = lport_priv(lport); 1698 FNIC_SCSI_DBG(KERN_DEBUG, 1699 fnic->lport->host, "fnic_terminate_rport_io called" 1700 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1701 rport->port_name, rport->node_name, rport, 1702 rport->port_id); 1703 1704 if (fnic->in_remove) 1705 return; 1706 1707 fnic_rport_exch_reset(fnic, rport->port_id); 1708 } 1709 1710 /* 1711 * This function is exported to SCSI for sending abort cmnds. 1712 * A SCSI IO is represented by a io_req in the driver. 1713 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1714 */ 1715 int fnic_abort_cmd(struct scsi_cmnd *sc) 1716 { 1717 struct request *const rq = scsi_cmd_to_rq(sc); 1718 struct fc_lport *lp; 1719 struct fnic *fnic; 1720 struct fnic_io_req *io_req = NULL; 1721 struct fc_rport *rport; 1722 spinlock_t *io_lock; 1723 unsigned long flags; 1724 unsigned long start_time = 0; 1725 int ret = SUCCESS; 1726 u32 task_req = 0; 1727 struct scsi_lun fc_lun; 1728 struct fnic_stats *fnic_stats; 1729 struct abort_stats *abts_stats; 1730 struct terminate_stats *term_stats; 1731 enum fnic_ioreq_state old_ioreq_state; 1732 const int tag = rq->tag; 1733 unsigned long abt_issued_time; 1734 DECLARE_COMPLETION_ONSTACK(tm_done); 1735 1736 /* Wait for rport to unblock */ 1737 fc_block_scsi_eh(sc); 1738 1739 /* Get local-port, check ready and link up */ 1740 lp = shost_priv(sc->device->host); 1741 1742 fnic = lport_priv(lp); 1743 fnic_stats = &fnic->fnic_stats; 1744 abts_stats = &fnic->fnic_stats.abts_stats; 1745 term_stats = &fnic->fnic_stats.term_stats; 1746 1747 rport = starget_to_rport(scsi_target(sc->device)); 1748 FNIC_SCSI_DBG(KERN_DEBUG, 1749 fnic->lport->host, 1750 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1751 rport->port_id, sc->device->lun, tag, fnic_priv(sc)->flags); 1752 1753 fnic_priv(sc)->flags = FNIC_NO_FLAGS; 1754 1755 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1756 ret = FAILED; 1757 goto fnic_abort_cmd_end; 1758 } 1759 1760 /* 1761 * Avoid a race between SCSI issuing the abort and the device 1762 * completing the command. 1763 * 1764 * If the command is already completed by the fw cmpl code, 1765 * we just return SUCCESS from here. This means that the abort 1766 * succeeded. In the SCSI ML, since the timeout for command has 1767 * happened, the completion wont actually complete the command 1768 * and it will be considered as an aborted command 1769 * 1770 * .io_req will not be cleared except while holding io_req_lock. 1771 */ 1772 io_lock = fnic_io_lock_hash(fnic, sc); 1773 spin_lock_irqsave(io_lock, flags); 1774 io_req = fnic_priv(sc)->io_req; 1775 if (!io_req) { 1776 spin_unlock_irqrestore(io_lock, flags); 1777 goto fnic_abort_cmd_end; 1778 } 1779 1780 io_req->abts_done = &tm_done; 1781 1782 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1783 spin_unlock_irqrestore(io_lock, flags); 1784 goto wait_pending; 1785 } 1786 1787 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1788 if (abt_issued_time <= 6000) 1789 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1790 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1791 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1792 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1793 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1794 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1795 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1796 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1797 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1798 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1799 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1800 else 1801 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1802 1803 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1804 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1805 /* 1806 * Command is still pending, need to abort it 1807 * If the firmware completes the command after this point, 1808 * the completion wont be done till mid-layer, since abort 1809 * has already started. 1810 */ 1811 old_ioreq_state = fnic_priv(sc)->state; 1812 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 1813 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 1814 1815 spin_unlock_irqrestore(io_lock, flags); 1816 1817 /* 1818 * Check readiness of the remote port. If the path to remote 1819 * port is up, then send abts to the remote port to terminate 1820 * the IO. Else, just locally terminate the IO in the firmware 1821 */ 1822 if (fc_remote_port_chkready(rport) == 0) 1823 task_req = FCPIO_ITMF_ABT_TASK; 1824 else { 1825 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1826 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1827 } 1828 1829 /* Now queue the abort command to firmware */ 1830 int_to_scsilun(sc->device->lun, &fc_lun); 1831 1832 if (fnic_queue_abort_io_req(fnic, tag, task_req, fc_lun.scsi_lun, 1833 io_req)) { 1834 spin_lock_irqsave(io_lock, flags); 1835 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 1836 fnic_priv(sc)->state = old_ioreq_state; 1837 io_req = fnic_priv(sc)->io_req; 1838 if (io_req) 1839 io_req->abts_done = NULL; 1840 spin_unlock_irqrestore(io_lock, flags); 1841 ret = FAILED; 1842 goto fnic_abort_cmd_end; 1843 } 1844 if (task_req == FCPIO_ITMF_ABT_TASK) { 1845 fnic_priv(sc)->flags |= FNIC_IO_ABTS_ISSUED; 1846 atomic64_inc(&fnic_stats->abts_stats.aborts); 1847 } else { 1848 fnic_priv(sc)->flags |= FNIC_IO_TERM_ISSUED; 1849 atomic64_inc(&fnic_stats->term_stats.terminates); 1850 } 1851 1852 /* 1853 * We queued an abort IO, wait for its completion. 1854 * Once the firmware completes the abort command, it will 1855 * wake up this thread. 1856 */ 1857 wait_pending: 1858 wait_for_completion_timeout(&tm_done, 1859 msecs_to_jiffies 1860 (2 * fnic->config.ra_tov + 1861 fnic->config.ed_tov)); 1862 1863 /* Check the abort status */ 1864 spin_lock_irqsave(io_lock, flags); 1865 1866 io_req = fnic_priv(sc)->io_req; 1867 if (!io_req) { 1868 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1869 spin_unlock_irqrestore(io_lock, flags); 1870 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 1871 ret = FAILED; 1872 goto fnic_abort_cmd_end; 1873 } 1874 io_req->abts_done = NULL; 1875 1876 /* fw did not complete abort, timed out */ 1877 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) { 1878 spin_unlock_irqrestore(io_lock, flags); 1879 if (task_req == FCPIO_ITMF_ABT_TASK) { 1880 atomic64_inc(&abts_stats->abort_drv_timeouts); 1881 } else { 1882 atomic64_inc(&term_stats->terminate_drv_timeouts); 1883 } 1884 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_TIMED_OUT; 1885 ret = FAILED; 1886 goto fnic_abort_cmd_end; 1887 } 1888 1889 /* IO out of order */ 1890 1891 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1892 spin_unlock_irqrestore(io_lock, flags); 1893 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1894 "Issuing Host reset due to out of order IO\n"); 1895 1896 ret = FAILED; 1897 goto fnic_abort_cmd_end; 1898 } 1899 1900 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 1901 1902 start_time = io_req->start_time; 1903 /* 1904 * firmware completed the abort, check the status, 1905 * free the io_req if successful. If abort fails, 1906 * Device reset will clean the I/O. 1907 */ 1908 if (fnic_priv(sc)->abts_status == FCPIO_SUCCESS) { 1909 fnic_priv(sc)->io_req = NULL; 1910 } else { 1911 ret = FAILED; 1912 spin_unlock_irqrestore(io_lock, flags); 1913 goto fnic_abort_cmd_end; 1914 } 1915 1916 spin_unlock_irqrestore(io_lock, flags); 1917 1918 fnic_release_ioreq_buf(fnic, io_req, sc); 1919 mempool_free(io_req, fnic->io_req_pool); 1920 1921 /* Call SCSI completion function to complete the IO */ 1922 sc->result = DID_ABORT << 16; 1923 scsi_done(sc); 1924 atomic64_dec(&fnic_stats->io_stats.active_ios); 1925 if (atomic64_read(&fnic->io_cmpl_skip)) 1926 atomic64_dec(&fnic->io_cmpl_skip); 1927 else 1928 atomic64_inc(&fnic_stats->io_stats.io_completions); 1929 1930 fnic_abort_cmd_end: 1931 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, tag, sc, 1932 jiffies_to_msecs(jiffies - start_time), 1933 0, ((u64)sc->cmnd[0] << 32 | 1934 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1935 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1936 fnic_flags_and_state(sc)); 1937 1938 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1939 "Returning from abort cmd type %x %s\n", task_req, 1940 (ret == SUCCESS) ? 1941 "SUCCESS" : "FAILED"); 1942 return ret; 1943 } 1944 1945 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 1946 struct scsi_cmnd *sc, 1947 struct fnic_io_req *io_req) 1948 { 1949 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1950 struct Scsi_Host *host = fnic->lport->host; 1951 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1952 struct scsi_lun fc_lun; 1953 int ret = 0; 1954 unsigned long intr_flags; 1955 1956 spin_lock_irqsave(host->host_lock, intr_flags); 1957 if (unlikely(fnic_chk_state_flags_locked(fnic, 1958 FNIC_FLAGS_IO_BLOCKED))) { 1959 spin_unlock_irqrestore(host->host_lock, intr_flags); 1960 return FAILED; 1961 } else 1962 atomic_inc(&fnic->in_flight); 1963 spin_unlock_irqrestore(host->host_lock, intr_flags); 1964 1965 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 1966 1967 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1968 free_wq_copy_descs(fnic, wq); 1969 1970 if (!vnic_wq_copy_desc_avail(wq)) { 1971 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1972 "queue_dr_io_req failure - no descriptors\n"); 1973 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 1974 ret = -EAGAIN; 1975 goto lr_io_req_end; 1976 } 1977 1978 /* fill in the lun info */ 1979 int_to_scsilun(sc->device->lun, &fc_lun); 1980 1981 fnic_queue_wq_copy_desc_itmf(wq, scsi_cmd_to_rq(sc)->tag | FNIC_TAG_DEV_RST, 1982 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 1983 fc_lun.scsi_lun, io_req->port_id, 1984 fnic->config.ra_tov, fnic->config.ed_tov); 1985 1986 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1987 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1988 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1989 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1990 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1991 1992 lr_io_req_end: 1993 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 1994 atomic_dec(&fnic->in_flight); 1995 1996 return ret; 1997 } 1998 1999 struct fnic_pending_aborts_iter_data { 2000 struct fnic *fnic; 2001 struct scsi_cmnd *lr_sc; 2002 struct scsi_device *lun_dev; 2003 int ret; 2004 }; 2005 2006 static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, 2007 void *data, bool reserved) 2008 { 2009 struct fnic_pending_aborts_iter_data *iter_data = data; 2010 struct fnic *fnic = iter_data->fnic; 2011 struct scsi_device *lun_dev = iter_data->lun_dev; 2012 int abt_tag = scsi_cmd_to_rq(sc)->tag; 2013 struct fnic_io_req *io_req; 2014 spinlock_t *io_lock; 2015 unsigned long flags; 2016 struct scsi_lun fc_lun; 2017 DECLARE_COMPLETION_ONSTACK(tm_done); 2018 enum fnic_ioreq_state old_ioreq_state; 2019 2020 if (sc == iter_data->lr_sc || sc->device != lun_dev) 2021 return true; 2022 if (reserved) 2023 return true; 2024 2025 io_lock = fnic_io_lock_tag(fnic, abt_tag); 2026 spin_lock_irqsave(io_lock, flags); 2027 io_req = fnic_priv(sc)->io_req; 2028 if (!io_req) { 2029 spin_unlock_irqrestore(io_lock, flags); 2030 return true; 2031 } 2032 2033 /* 2034 * Found IO that is still pending with firmware and 2035 * belongs to the LUN that we are resetting 2036 */ 2037 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2038 "Found IO in %s on lun\n", 2039 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2040 2041 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 2042 spin_unlock_irqrestore(io_lock, flags); 2043 return true; 2044 } 2045 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 2046 (!(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED))) { 2047 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2048 "%s dev rst not pending sc 0x%p\n", __func__, 2049 sc); 2050 spin_unlock_irqrestore(io_lock, flags); 2051 return true; 2052 } 2053 2054 if (io_req->abts_done) 2055 shost_printk(KERN_ERR, fnic->lport->host, 2056 "%s: io_req->abts_done is set state is %s\n", 2057 __func__, fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2058 old_ioreq_state = fnic_priv(sc)->state; 2059 /* 2060 * Any pending IO issued prior to reset is expected to be 2061 * in abts pending state, if not we need to set 2062 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2063 * When IO is completed, the IO will be handed over and 2064 * handled in this function. 2065 */ 2066 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 2067 2068 BUG_ON(io_req->abts_done); 2069 2070 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 2071 abt_tag |= FNIC_TAG_DEV_RST; 2072 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2073 "%s: dev rst sc 0x%p\n", __func__, sc); 2074 } 2075 2076 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 2077 io_req->abts_done = &tm_done; 2078 spin_unlock_irqrestore(io_lock, flags); 2079 2080 /* Now queue the abort command to firmware */ 2081 int_to_scsilun(sc->device->lun, &fc_lun); 2082 2083 if (fnic_queue_abort_io_req(fnic, abt_tag, 2084 FCPIO_ITMF_ABT_TASK_TERM, 2085 fc_lun.scsi_lun, io_req)) { 2086 spin_lock_irqsave(io_lock, flags); 2087 io_req = fnic_priv(sc)->io_req; 2088 if (io_req) 2089 io_req->abts_done = NULL; 2090 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 2091 fnic_priv(sc)->state = old_ioreq_state; 2092 spin_unlock_irqrestore(io_lock, flags); 2093 iter_data->ret = FAILED; 2094 return false; 2095 } else { 2096 spin_lock_irqsave(io_lock, flags); 2097 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) 2098 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 2099 spin_unlock_irqrestore(io_lock, flags); 2100 } 2101 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED; 2102 2103 wait_for_completion_timeout(&tm_done, msecs_to_jiffies 2104 (fnic->config.ed_tov)); 2105 2106 /* Recheck cmd state to check if it is now aborted */ 2107 spin_lock_irqsave(io_lock, flags); 2108 io_req = fnic_priv(sc)->io_req; 2109 if (!io_req) { 2110 spin_unlock_irqrestore(io_lock, flags); 2111 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 2112 return true; 2113 } 2114 2115 io_req->abts_done = NULL; 2116 2117 /* if abort is still pending with fw, fail */ 2118 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) { 2119 spin_unlock_irqrestore(io_lock, flags); 2120 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE; 2121 iter_data->ret = FAILED; 2122 return false; 2123 } 2124 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 2125 2126 /* original sc used for lr is handled by dev reset code */ 2127 if (sc != iter_data->lr_sc) 2128 fnic_priv(sc)->io_req = NULL; 2129 spin_unlock_irqrestore(io_lock, flags); 2130 2131 /* original sc used for lr is handled by dev reset code */ 2132 if (sc != iter_data->lr_sc) { 2133 fnic_release_ioreq_buf(fnic, io_req, sc); 2134 mempool_free(io_req, fnic->io_req_pool); 2135 } 2136 2137 /* 2138 * Any IO is returned during reset, it needs to call scsi_done 2139 * to return the scsi_cmnd to upper layer. 2140 */ 2141 /* Set result to let upper SCSI layer retry */ 2142 sc->result = DID_RESET << 16; 2143 scsi_done(sc); 2144 2145 return true; 2146 } 2147 2148 /* 2149 * Clean up any pending aborts on the lun 2150 * For each outstanding IO on this lun, whose abort is not completed by fw, 2151 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2152 * successfully aborted, 1 otherwise 2153 */ 2154 static int fnic_clean_pending_aborts(struct fnic *fnic, 2155 struct scsi_cmnd *lr_sc, 2156 bool new_sc) 2157 2158 { 2159 int ret = SUCCESS; 2160 struct fnic_pending_aborts_iter_data iter_data = { 2161 .fnic = fnic, 2162 .lun_dev = lr_sc->device, 2163 .ret = SUCCESS, 2164 }; 2165 2166 if (new_sc) 2167 iter_data.lr_sc = lr_sc; 2168 2169 scsi_host_busy_iter(fnic->lport->host, 2170 fnic_pending_aborts_iter, &iter_data); 2171 if (iter_data.ret == FAILED) { 2172 ret = iter_data.ret; 2173 goto clean_pending_aborts_end; 2174 } 2175 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2176 2177 /* walk again to check, if IOs are still pending in fw */ 2178 if (fnic_is_abts_pending(fnic, lr_sc)) 2179 ret = FAILED; 2180 2181 clean_pending_aborts_end: 2182 return ret; 2183 } 2184 2185 /* 2186 * fnic_scsi_host_start_tag 2187 * Allocates tagid from host's tag list 2188 **/ 2189 static inline int 2190 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2191 { 2192 struct request *rq = scsi_cmd_to_rq(sc); 2193 struct request_queue *q = rq->q; 2194 struct request *dummy; 2195 2196 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); 2197 if (IS_ERR(dummy)) 2198 return SCSI_NO_TAG; 2199 2200 rq->tag = dummy->tag; 2201 sc->host_scribble = (unsigned char *)dummy; 2202 2203 return dummy->tag; 2204 } 2205 2206 /* 2207 * fnic_scsi_host_end_tag 2208 * frees tag allocated by fnic_scsi_host_start_tag. 2209 **/ 2210 static inline void 2211 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2212 { 2213 struct request *dummy = (struct request *)sc->host_scribble; 2214 2215 blk_mq_free_request(dummy); 2216 } 2217 2218 /* 2219 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2220 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2221 * on the LUN. 2222 */ 2223 int fnic_device_reset(struct scsi_cmnd *sc) 2224 { 2225 struct request *rq = scsi_cmd_to_rq(sc); 2226 struct fc_lport *lp; 2227 struct fnic *fnic; 2228 struct fnic_io_req *io_req = NULL; 2229 struct fc_rport *rport; 2230 int status; 2231 int ret = FAILED; 2232 spinlock_t *io_lock; 2233 unsigned long flags; 2234 unsigned long start_time = 0; 2235 struct scsi_lun fc_lun; 2236 struct fnic_stats *fnic_stats; 2237 struct reset_stats *reset_stats; 2238 int tag = rq->tag; 2239 DECLARE_COMPLETION_ONSTACK(tm_done); 2240 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2241 bool new_sc = 0; 2242 2243 /* Wait for rport to unblock */ 2244 fc_block_scsi_eh(sc); 2245 2246 /* Get local-port, check ready and link up */ 2247 lp = shost_priv(sc->device->host); 2248 2249 fnic = lport_priv(lp); 2250 fnic_stats = &fnic->fnic_stats; 2251 reset_stats = &fnic->fnic_stats.reset_stats; 2252 2253 atomic64_inc(&reset_stats->device_resets); 2254 2255 rport = starget_to_rport(scsi_target(sc->device)); 2256 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2257 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2258 rport->port_id, sc->device->lun, sc); 2259 2260 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2261 goto fnic_device_reset_end; 2262 2263 /* Check if remote port up */ 2264 if (fc_remote_port_chkready(rport)) { 2265 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2266 goto fnic_device_reset_end; 2267 } 2268 2269 fnic_priv(sc)->flags = FNIC_DEVICE_RESET; 2270 /* Allocate tag if not present */ 2271 2272 if (unlikely(tag < 0)) { 2273 /* 2274 * Really should fix the midlayer to pass in a proper 2275 * request for ioctls... 2276 */ 2277 tag = fnic_scsi_host_start_tag(fnic, sc); 2278 if (unlikely(tag == SCSI_NO_TAG)) 2279 goto fnic_device_reset_end; 2280 tag_gen_flag = 1; 2281 new_sc = 1; 2282 } 2283 io_lock = fnic_io_lock_hash(fnic, sc); 2284 spin_lock_irqsave(io_lock, flags); 2285 io_req = fnic_priv(sc)->io_req; 2286 2287 /* 2288 * If there is a io_req attached to this command, then use it, 2289 * else allocate a new one. 2290 */ 2291 if (!io_req) { 2292 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2293 if (!io_req) { 2294 spin_unlock_irqrestore(io_lock, flags); 2295 goto fnic_device_reset_end; 2296 } 2297 memset(io_req, 0, sizeof(*io_req)); 2298 io_req->port_id = rport->port_id; 2299 fnic_priv(sc)->io_req = io_req; 2300 } 2301 io_req->dr_done = &tm_done; 2302 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING; 2303 fnic_priv(sc)->lr_status = FCPIO_INVALID_CODE; 2304 spin_unlock_irqrestore(io_lock, flags); 2305 2306 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2307 2308 /* 2309 * issue the device reset, if enqueue failed, clean up the ioreq 2310 * and break assoc with scsi cmd 2311 */ 2312 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2313 spin_lock_irqsave(io_lock, flags); 2314 io_req = fnic_priv(sc)->io_req; 2315 if (io_req) 2316 io_req->dr_done = NULL; 2317 goto fnic_device_reset_clean; 2318 } 2319 spin_lock_irqsave(io_lock, flags); 2320 fnic_priv(sc)->flags |= FNIC_DEV_RST_ISSUED; 2321 spin_unlock_irqrestore(io_lock, flags); 2322 2323 /* 2324 * Wait on the local completion for LUN reset. The io_req may be 2325 * freed while we wait since we hold no lock. 2326 */ 2327 wait_for_completion_timeout(&tm_done, 2328 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2329 2330 spin_lock_irqsave(io_lock, flags); 2331 io_req = fnic_priv(sc)->io_req; 2332 if (!io_req) { 2333 spin_unlock_irqrestore(io_lock, flags); 2334 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2335 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2336 goto fnic_device_reset_end; 2337 } 2338 io_req->dr_done = NULL; 2339 2340 status = fnic_priv(sc)->lr_status; 2341 2342 /* 2343 * If lun reset not completed, bail out with failed. io_req 2344 * gets cleaned up during higher levels of EH 2345 */ 2346 if (status == FCPIO_INVALID_CODE) { 2347 atomic64_inc(&reset_stats->device_reset_timeouts); 2348 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2349 "Device reset timed out\n"); 2350 fnic_priv(sc)->flags |= FNIC_DEV_RST_TIMED_OUT; 2351 spin_unlock_irqrestore(io_lock, flags); 2352 int_to_scsilun(sc->device->lun, &fc_lun); 2353 /* 2354 * Issue abort and terminate on device reset request. 2355 * If q'ing of terminate fails, retry it after a delay. 2356 */ 2357 while (1) { 2358 spin_lock_irqsave(io_lock, flags); 2359 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TERM_ISSUED) { 2360 spin_unlock_irqrestore(io_lock, flags); 2361 break; 2362 } 2363 spin_unlock_irqrestore(io_lock, flags); 2364 if (fnic_queue_abort_io_req(fnic, 2365 tag | FNIC_TAG_DEV_RST, 2366 FCPIO_ITMF_ABT_TASK_TERM, 2367 fc_lun.scsi_lun, io_req)) { 2368 wait_for_completion_timeout(&tm_done, 2369 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2370 } else { 2371 spin_lock_irqsave(io_lock, flags); 2372 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 2373 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 2374 io_req->abts_done = &tm_done; 2375 spin_unlock_irqrestore(io_lock, flags); 2376 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2377 "Abort and terminate issued on Device reset " 2378 "tag 0x%x sc 0x%p\n", tag, sc); 2379 break; 2380 } 2381 } 2382 while (1) { 2383 spin_lock_irqsave(io_lock, flags); 2384 if (!(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { 2385 spin_unlock_irqrestore(io_lock, flags); 2386 wait_for_completion_timeout(&tm_done, 2387 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2388 break; 2389 } else { 2390 io_req = fnic_priv(sc)->io_req; 2391 io_req->abts_done = NULL; 2392 goto fnic_device_reset_clean; 2393 } 2394 } 2395 } else { 2396 spin_unlock_irqrestore(io_lock, flags); 2397 } 2398 2399 /* Completed, but not successful, clean up the io_req, return fail */ 2400 if (status != FCPIO_SUCCESS) { 2401 spin_lock_irqsave(io_lock, flags); 2402 FNIC_SCSI_DBG(KERN_DEBUG, 2403 fnic->lport->host, 2404 "Device reset completed - failed\n"); 2405 io_req = fnic_priv(sc)->io_req; 2406 goto fnic_device_reset_clean; 2407 } 2408 2409 /* 2410 * Clean up any aborts on this lun that have still not 2411 * completed. If any of these fail, then LUN reset fails. 2412 * clean_pending_aborts cleans all cmds on this lun except 2413 * the lun reset cmd. If all cmds get cleaned, the lun reset 2414 * succeeds 2415 */ 2416 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2417 spin_lock_irqsave(io_lock, flags); 2418 io_req = fnic_priv(sc)->io_req; 2419 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2420 "Device reset failed" 2421 " since could not abort all IOs\n"); 2422 goto fnic_device_reset_clean; 2423 } 2424 2425 /* Clean lun reset command */ 2426 spin_lock_irqsave(io_lock, flags); 2427 io_req = fnic_priv(sc)->io_req; 2428 if (io_req) 2429 /* Completed, and successful */ 2430 ret = SUCCESS; 2431 2432 fnic_device_reset_clean: 2433 if (io_req) 2434 fnic_priv(sc)->io_req = NULL; 2435 2436 spin_unlock_irqrestore(io_lock, flags); 2437 2438 if (io_req) { 2439 start_time = io_req->start_time; 2440 fnic_release_ioreq_buf(fnic, io_req, sc); 2441 mempool_free(io_req, fnic->io_req_pool); 2442 } 2443 2444 fnic_device_reset_end: 2445 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc, 2446 jiffies_to_msecs(jiffies - start_time), 2447 0, ((u64)sc->cmnd[0] << 32 | 2448 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2449 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2450 fnic_flags_and_state(sc)); 2451 2452 /* free tag if it is allocated */ 2453 if (unlikely(tag_gen_flag)) 2454 fnic_scsi_host_end_tag(fnic, sc); 2455 2456 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2457 "Returning from device reset %s\n", 2458 (ret == SUCCESS) ? 2459 "SUCCESS" : "FAILED"); 2460 2461 if (ret == FAILED) 2462 atomic64_inc(&reset_stats->device_reset_failures); 2463 2464 return ret; 2465 } 2466 2467 /* Clean up all IOs, clean up libFC local port */ 2468 int fnic_reset(struct Scsi_Host *shost) 2469 { 2470 struct fc_lport *lp; 2471 struct fnic *fnic; 2472 int ret = 0; 2473 struct reset_stats *reset_stats; 2474 2475 lp = shost_priv(shost); 2476 fnic = lport_priv(lp); 2477 reset_stats = &fnic->fnic_stats.reset_stats; 2478 2479 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2480 "fnic_reset called\n"); 2481 2482 atomic64_inc(&reset_stats->fnic_resets); 2483 2484 /* 2485 * Reset local port, this will clean up libFC exchanges, 2486 * reset remote port sessions, and if link is up, begin flogi 2487 */ 2488 ret = fc_lport_reset(lp); 2489 2490 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2491 "Returning from fnic reset %s\n", 2492 (ret == 0) ? 2493 "SUCCESS" : "FAILED"); 2494 2495 if (ret == 0) 2496 atomic64_inc(&reset_stats->fnic_reset_completions); 2497 else 2498 atomic64_inc(&reset_stats->fnic_reset_failures); 2499 2500 return ret; 2501 } 2502 2503 /* 2504 * SCSI Error handling calls driver's eh_host_reset if all prior 2505 * error handling levels return FAILED. If host reset completes 2506 * successfully, and if link is up, then Fabric login begins. 2507 * 2508 * Host Reset is the highest level of error recovery. If this fails, then 2509 * host is offlined by SCSI. 2510 * 2511 */ 2512 int fnic_host_reset(struct scsi_cmnd *sc) 2513 { 2514 int ret; 2515 unsigned long wait_host_tmo; 2516 struct Scsi_Host *shost = sc->device->host; 2517 struct fc_lport *lp = shost_priv(shost); 2518 struct fnic *fnic = lport_priv(lp); 2519 unsigned long flags; 2520 2521 spin_lock_irqsave(&fnic->fnic_lock, flags); 2522 if (!fnic->internal_reset_inprogress) { 2523 fnic->internal_reset_inprogress = true; 2524 } else { 2525 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2526 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2527 "host reset in progress skipping another host reset\n"); 2528 return SUCCESS; 2529 } 2530 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2531 2532 /* 2533 * If fnic_reset is successful, wait for fabric login to complete 2534 * scsi-ml tries to send a TUR to every device if host reset is 2535 * successful, so before returning to scsi, fabric should be up 2536 */ 2537 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2538 if (ret == SUCCESS) { 2539 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2540 ret = FAILED; 2541 while (time_before(jiffies, wait_host_tmo)) { 2542 if ((lp->state == LPORT_ST_READY) && 2543 (lp->link_up)) { 2544 ret = SUCCESS; 2545 break; 2546 } 2547 ssleep(1); 2548 } 2549 } 2550 2551 spin_lock_irqsave(&fnic->fnic_lock, flags); 2552 fnic->internal_reset_inprogress = false; 2553 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2554 return ret; 2555 } 2556 2557 /* 2558 * This fxn is called from libFC when host is removed 2559 */ 2560 void fnic_scsi_abort_io(struct fc_lport *lp) 2561 { 2562 int err = 0; 2563 unsigned long flags; 2564 enum fnic_state old_state; 2565 struct fnic *fnic = lport_priv(lp); 2566 DECLARE_COMPLETION_ONSTACK(remove_wait); 2567 2568 /* Issue firmware reset for fnic, wait for reset to complete */ 2569 retry_fw_reset: 2570 spin_lock_irqsave(&fnic->fnic_lock, flags); 2571 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) && 2572 fnic->link_events) { 2573 /* fw reset is in progress, poll for its completion */ 2574 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2575 schedule_timeout(msecs_to_jiffies(100)); 2576 goto retry_fw_reset; 2577 } 2578 2579 fnic->remove_wait = &remove_wait; 2580 old_state = fnic->state; 2581 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2582 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2583 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2584 2585 err = fnic_fw_reset_handler(fnic); 2586 if (err) { 2587 spin_lock_irqsave(&fnic->fnic_lock, flags); 2588 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2589 fnic->state = old_state; 2590 fnic->remove_wait = NULL; 2591 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2592 return; 2593 } 2594 2595 /* Wait for firmware reset to complete */ 2596 wait_for_completion_timeout(&remove_wait, 2597 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2598 2599 spin_lock_irqsave(&fnic->fnic_lock, flags); 2600 fnic->remove_wait = NULL; 2601 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2602 "fnic_scsi_abort_io %s\n", 2603 (fnic->state == FNIC_IN_ETH_MODE) ? 2604 "SUCCESS" : "FAILED"); 2605 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2606 2607 } 2608 2609 /* 2610 * This fxn called from libFC to clean up driver IO state on link down 2611 */ 2612 void fnic_scsi_cleanup(struct fc_lport *lp) 2613 { 2614 unsigned long flags; 2615 enum fnic_state old_state; 2616 struct fnic *fnic = lport_priv(lp); 2617 2618 /* issue fw reset */ 2619 retry_fw_reset: 2620 spin_lock_irqsave(&fnic->fnic_lock, flags); 2621 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2622 /* fw reset is in progress, poll for its completion */ 2623 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2624 schedule_timeout(msecs_to_jiffies(100)); 2625 goto retry_fw_reset; 2626 } 2627 old_state = fnic->state; 2628 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2629 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2630 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2631 2632 if (fnic_fw_reset_handler(fnic)) { 2633 spin_lock_irqsave(&fnic->fnic_lock, flags); 2634 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2635 fnic->state = old_state; 2636 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2637 } 2638 2639 } 2640 2641 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2642 { 2643 } 2644 2645 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2646 { 2647 struct fnic *fnic = lport_priv(lp); 2648 2649 /* Non-zero sid, nothing to do */ 2650 if (sid) 2651 goto call_fc_exch_mgr_reset; 2652 2653 if (did) { 2654 fnic_rport_exch_reset(fnic, did); 2655 goto call_fc_exch_mgr_reset; 2656 } 2657 2658 /* 2659 * sid = 0, did = 0 2660 * link down or device being removed 2661 */ 2662 if (!fnic->in_remove) 2663 fnic_scsi_cleanup(lp); 2664 else 2665 fnic_scsi_abort_io(lp); 2666 2667 /* call libFC exch mgr reset to reset its exchanges */ 2668 call_fc_exch_mgr_reset: 2669 fc_exch_mgr_reset(lp, sid, did); 2670 2671 } 2672 2673 static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data, 2674 bool reserved) 2675 { 2676 struct fnic_pending_aborts_iter_data *iter_data = data; 2677 struct fnic *fnic = iter_data->fnic; 2678 int cmd_state; 2679 struct fnic_io_req *io_req; 2680 spinlock_t *io_lock; 2681 unsigned long flags; 2682 2683 /* 2684 * ignore this lun reset cmd or cmds that do not belong to 2685 * this lun 2686 */ 2687 if (iter_data->lr_sc && sc == iter_data->lr_sc) 2688 return true; 2689 if (iter_data->lun_dev && sc->device != iter_data->lun_dev) 2690 return true; 2691 2692 io_lock = fnic_io_lock_hash(fnic, sc); 2693 spin_lock_irqsave(io_lock, flags); 2694 2695 io_req = fnic_priv(sc)->io_req; 2696 if (!io_req) { 2697 spin_unlock_irqrestore(io_lock, flags); 2698 return true; 2699 } 2700 2701 /* 2702 * Found IO that is still pending with firmware and 2703 * belongs to the LUN that we are resetting 2704 */ 2705 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2706 "Found IO in %s on lun\n", 2707 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2708 cmd_state = fnic_priv(sc)->state; 2709 spin_unlock_irqrestore(io_lock, flags); 2710 if (cmd_state == FNIC_IOREQ_ABTS_PENDING) 2711 iter_data->ret = 1; 2712 2713 return iter_data->ret ? false : true; 2714 } 2715 2716 /* 2717 * fnic_is_abts_pending() is a helper function that 2718 * walks through tag map to check if there is any IOs pending,if there is one, 2719 * then it returns 1 (true), otherwise 0 (false) 2720 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2721 * otherwise, it checks for all IOs. 2722 */ 2723 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2724 { 2725 struct fnic_pending_aborts_iter_data iter_data = { 2726 .fnic = fnic, 2727 .lun_dev = NULL, 2728 .ret = 0, 2729 }; 2730 2731 if (lr_sc) { 2732 iter_data.lun_dev = lr_sc->device; 2733 iter_data.lr_sc = lr_sc; 2734 } 2735 2736 /* walk again to check, if IOs are still pending in fw */ 2737 scsi_host_busy_iter(fnic->lport->host, 2738 fnic_abts_pending_iter, &iter_data); 2739 2740 return iter_data.ret; 2741 } 2742