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