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, void (*done)(struct scsi_cmnd *)) 424 { 425 const int tag = scsi_cmd_to_rq(sc)->tag; 426 struct fc_lport *lp = shost_priv(sc->device->host); 427 struct fc_rport *rport; 428 struct fnic_io_req *io_req = NULL; 429 struct fnic *fnic = lport_priv(lp); 430 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 431 struct vnic_wq_copy *wq; 432 int ret; 433 u64 cmd_trace; 434 int sg_count = 0; 435 unsigned long flags = 0; 436 unsigned long ptr; 437 spinlock_t *io_lock = NULL; 438 int io_lock_acquired = 0; 439 struct fc_rport_libfc_priv *rp; 440 441 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 442 return SCSI_MLQUEUE_HOST_BUSY; 443 444 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) 445 return SCSI_MLQUEUE_HOST_BUSY; 446 447 rport = starget_to_rport(scsi_target(sc->device)); 448 if (!rport) { 449 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 450 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 451 sc->result = DID_NO_CONNECT << 16; 452 done(sc); 453 return 0; 454 } 455 456 ret = fc_remote_port_chkready(rport); 457 if (ret) { 458 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 459 "rport is not ready\n"); 460 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 461 sc->result = ret; 462 done(sc); 463 return 0; 464 } 465 466 rp = rport->dd_data; 467 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 468 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 469 "rport 0x%x removed, returning DID_NO_CONNECT\n", 470 rport->port_id); 471 472 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 473 sc->result = DID_NO_CONNECT<<16; 474 done(sc); 475 return 0; 476 } 477 478 if (rp->rp_state != RPORT_ST_READY) { 479 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 480 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 481 rport->port_id, rp->rp_state); 482 483 sc->result = DID_IMM_RETRY << 16; 484 done(sc); 485 return 0; 486 } 487 488 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 489 return SCSI_MLQUEUE_HOST_BUSY; 490 491 atomic_inc(&fnic->in_flight); 492 493 /* 494 * Release host lock, use driver resource specific locks from here. 495 * Don't re-enable interrupts in case they were disabled prior to the 496 * caller disabling them. 497 */ 498 spin_unlock(lp->host->host_lock); 499 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 500 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 501 502 /* Get a new io_req for this SCSI IO */ 503 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 504 if (!io_req) { 505 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 506 ret = SCSI_MLQUEUE_HOST_BUSY; 507 goto out; 508 } 509 memset(io_req, 0, sizeof(*io_req)); 510 511 /* Map the data buffer */ 512 sg_count = scsi_dma_map(sc); 513 if (sg_count < 0) { 514 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 515 tag, sc, 0, sc->cmnd[0], sg_count, CMD_STATE(sc)); 516 mempool_free(io_req, fnic->io_req_pool); 517 goto out; 518 } 519 520 /* Determine the type of scatter/gather list we need */ 521 io_req->sgl_cnt = sg_count; 522 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 523 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 524 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 525 526 if (sg_count) { 527 io_req->sgl_list = 528 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 529 GFP_ATOMIC); 530 if (!io_req->sgl_list) { 531 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 532 ret = SCSI_MLQUEUE_HOST_BUSY; 533 scsi_dma_unmap(sc); 534 mempool_free(io_req, fnic->io_req_pool); 535 goto out; 536 } 537 538 /* Cache sgl list allocated address before alignment */ 539 io_req->sgl_list_alloc = io_req->sgl_list; 540 ptr = (unsigned long) io_req->sgl_list; 541 if (ptr % FNIC_SG_DESC_ALIGN) { 542 io_req->sgl_list = (struct host_sg_desc *) 543 (((unsigned long) ptr 544 + FNIC_SG_DESC_ALIGN - 1) 545 & ~(FNIC_SG_DESC_ALIGN - 1)); 546 } 547 } 548 549 /* 550 * Will acquire lock defore setting to IO initialized. 551 */ 552 553 io_lock = fnic_io_lock_hash(fnic, sc); 554 spin_lock_irqsave(io_lock, flags); 555 556 /* initialize rest of io_req */ 557 io_lock_acquired = 1; 558 io_req->port_id = rport->port_id; 559 io_req->start_time = jiffies; 560 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 561 CMD_SP(sc) = (char *)io_req; 562 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; 563 564 /* create copy wq desc and enqueue it */ 565 wq = &fnic->wq_copy[0]; 566 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 567 if (ret) { 568 /* 569 * In case another thread cancelled the request, 570 * refetch the pointer under the lock. 571 */ 572 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 573 tag, sc, 0, 0, 0, 574 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 575 io_req = (struct fnic_io_req *)CMD_SP(sc); 576 CMD_SP(sc) = NULL; 577 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 578 spin_unlock_irqrestore(io_lock, flags); 579 if (io_req) { 580 fnic_release_ioreq_buf(fnic, io_req, sc); 581 mempool_free(io_req, fnic->io_req_pool); 582 } 583 atomic_dec(&fnic->in_flight); 584 /* acquire host lock before returning to SCSI */ 585 spin_lock(lp->host->host_lock); 586 return ret; 587 } else { 588 atomic64_inc(&fnic_stats->io_stats.active_ios); 589 atomic64_inc(&fnic_stats->io_stats.num_ios); 590 if (atomic64_read(&fnic_stats->io_stats.active_ios) > 591 atomic64_read(&fnic_stats->io_stats.max_active_ios)) 592 atomic64_set(&fnic_stats->io_stats.max_active_ios, 593 atomic64_read(&fnic_stats->io_stats.active_ios)); 594 595 /* REVISIT: Use per IO lock in the final code */ 596 CMD_FLAGS(sc) |= FNIC_IO_ISSUED; 597 } 598 out: 599 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 600 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 601 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 602 sc->cmnd[5]); 603 604 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 605 tag, sc, io_req, sg_count, cmd_trace, 606 (((u64)CMD_FLAGS(sc) >> 32) | CMD_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 = (struct fnic_io_req *)CMD_SP(sc); 870 WARN_ON_ONCE(!io_req); 871 if (!io_req) { 872 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 873 CMD_FLAGS(sc) |= 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 (CMD_STATE(sc) == 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 CMD_FLAGS(sc) |= FNIC_IO_DONE; 897 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 898 spin_unlock_irqrestore(io_lock, flags); 899 if(FCPIO_ABORTED == hdr_status) 900 CMD_FLAGS(sc) |= 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 CMD_STATE(sc) = 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 CMD_SP(sc) = NULL; 986 CMD_FLAGS(sc) |= FNIC_IO_DONE; 987 988 spin_unlock_irqrestore(io_lock, flags); 989 990 if (hdr_status != FCPIO_SUCCESS) { 991 atomic64_inc(&fnic_stats->io_stats.io_failures); 992 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 993 fnic_fcpio_status_to_str(hdr_status)); 994 } 995 996 fnic_release_ioreq_buf(fnic, io_req, sc); 997 998 mempool_free(io_req, fnic->io_req_pool); 999 1000 cmd_trace = ((u64)hdr_status << 56) | 1001 (u64)icmnd_cmpl->scsi_status << 48 | 1002 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 1003 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1004 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 1005 1006 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 1007 sc->device->host->host_no, id, sc, 1008 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1009 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1010 jiffies_to_msecs(jiffies - start_time)), 1011 desc, cmd_trace, 1012 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1013 1014 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1015 fnic->lport->host_stats.fcp_input_requests++; 1016 fnic->fcp_input_bytes += xfer_len; 1017 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1018 fnic->lport->host_stats.fcp_output_requests++; 1019 fnic->fcp_output_bytes += xfer_len; 1020 } else 1021 fnic->lport->host_stats.fcp_control_requests++; 1022 1023 atomic64_dec(&fnic_stats->io_stats.active_ios); 1024 if (atomic64_read(&fnic->io_cmpl_skip)) 1025 atomic64_dec(&fnic->io_cmpl_skip); 1026 else 1027 atomic64_inc(&fnic_stats->io_stats.io_completions); 1028 1029 1030 io_duration_time = jiffies_to_msecs(jiffies) - 1031 jiffies_to_msecs(start_time); 1032 1033 if(io_duration_time <= 10) 1034 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1035 else if(io_duration_time <= 100) 1036 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1037 else if(io_duration_time <= 500) 1038 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1039 else if(io_duration_time <= 5000) 1040 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1041 else if(io_duration_time <= 10000) 1042 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1043 else if(io_duration_time <= 30000) 1044 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1045 else { 1046 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1047 1048 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1049 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1050 } 1051 1052 /* Call SCSI completion function to complete the IO */ 1053 scsi_done(sc); 1054 } 1055 1056 /* fnic_fcpio_itmf_cmpl_handler 1057 * Routine to handle itmf completions 1058 */ 1059 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1060 struct fcpio_fw_req *desc) 1061 { 1062 u8 type; 1063 u8 hdr_status; 1064 struct fcpio_tag tag; 1065 u32 id; 1066 struct scsi_cmnd *sc; 1067 struct fnic_io_req *io_req; 1068 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1069 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1070 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1071 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1072 unsigned long flags; 1073 spinlock_t *io_lock; 1074 unsigned long start_time; 1075 1076 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1077 fcpio_tag_id_dec(&tag, &id); 1078 1079 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1080 shost_printk(KERN_ERR, fnic->lport->host, 1081 "Tag out of range tag %x hdr status = %s\n", 1082 id, fnic_fcpio_status_to_str(hdr_status)); 1083 return; 1084 } 1085 1086 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1087 WARN_ON_ONCE(!sc); 1088 if (!sc) { 1089 atomic64_inc(&fnic_stats->io_stats.sc_null); 1090 shost_printk(KERN_ERR, fnic->lport->host, 1091 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1092 fnic_fcpio_status_to_str(hdr_status), id); 1093 return; 1094 } 1095 io_lock = fnic_io_lock_hash(fnic, sc); 1096 spin_lock_irqsave(io_lock, flags); 1097 io_req = (struct fnic_io_req *)CMD_SP(sc); 1098 WARN_ON_ONCE(!io_req); 1099 if (!io_req) { 1100 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1101 spin_unlock_irqrestore(io_lock, flags); 1102 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1103 shost_printk(KERN_ERR, fnic->lport->host, 1104 "itmf_cmpl io_req is null - " 1105 "hdr status = %s tag = 0x%x sc 0x%p\n", 1106 fnic_fcpio_status_to_str(hdr_status), id, sc); 1107 return; 1108 } 1109 start_time = io_req->start_time; 1110 1111 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1112 /* Abort and terminate completion of device reset req */ 1113 /* REVISIT : Add asserts about various flags */ 1114 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1115 "dev reset abts cmpl recd. id %x status %s\n", 1116 id, fnic_fcpio_status_to_str(hdr_status)); 1117 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1118 CMD_ABTS_STATUS(sc) = hdr_status; 1119 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1120 if (io_req->abts_done) 1121 complete(io_req->abts_done); 1122 spin_unlock_irqrestore(io_lock, flags); 1123 } else if (id & FNIC_TAG_ABORT) { 1124 /* Completion of abort cmd */ 1125 switch (hdr_status) { 1126 case FCPIO_SUCCESS: 1127 break; 1128 case FCPIO_TIMEOUT: 1129 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1130 atomic64_inc(&abts_stats->abort_fw_timeouts); 1131 else 1132 atomic64_inc( 1133 &term_stats->terminate_fw_timeouts); 1134 break; 1135 case FCPIO_ITMF_REJECTED: 1136 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1137 "abort reject recd. id %d\n", 1138 (int)(id & FNIC_TAG_MASK)); 1139 break; 1140 case FCPIO_IO_NOT_FOUND: 1141 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1142 atomic64_inc(&abts_stats->abort_io_not_found); 1143 else 1144 atomic64_inc( 1145 &term_stats->terminate_io_not_found); 1146 break; 1147 default: 1148 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1149 atomic64_inc(&abts_stats->abort_failures); 1150 else 1151 atomic64_inc( 1152 &term_stats->terminate_failures); 1153 break; 1154 } 1155 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 1156 /* This is a late completion. Ignore it */ 1157 spin_unlock_irqrestore(io_lock, flags); 1158 return; 1159 } 1160 1161 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1162 CMD_ABTS_STATUS(sc) = hdr_status; 1163 1164 /* If the status is IO not found consider it as success */ 1165 if (hdr_status == FCPIO_IO_NOT_FOUND) 1166 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; 1167 1168 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1169 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1170 1171 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1172 "abts cmpl recd. id %d status %s\n", 1173 (int)(id & FNIC_TAG_MASK), 1174 fnic_fcpio_status_to_str(hdr_status)); 1175 1176 /* 1177 * If scsi_eh thread is blocked waiting for abts to complete, 1178 * signal completion to it. IO will be cleaned in the thread 1179 * else clean it in this context 1180 */ 1181 if (io_req->abts_done) { 1182 complete(io_req->abts_done); 1183 spin_unlock_irqrestore(io_lock, flags); 1184 } else { 1185 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1186 "abts cmpl, completing IO\n"); 1187 CMD_SP(sc) = NULL; 1188 sc->result = (DID_ERROR << 16); 1189 1190 spin_unlock_irqrestore(io_lock, flags); 1191 1192 fnic_release_ioreq_buf(fnic, io_req, sc); 1193 mempool_free(io_req, fnic->io_req_pool); 1194 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1195 sc->device->host->host_no, id, 1196 sc, 1197 jiffies_to_msecs(jiffies - start_time), 1198 desc, 1199 (((u64)hdr_status << 40) | 1200 (u64)sc->cmnd[0] << 32 | 1201 (u64)sc->cmnd[2] << 24 | 1202 (u64)sc->cmnd[3] << 16 | 1203 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1204 (((u64)CMD_FLAGS(sc) << 32) | 1205 CMD_STATE(sc))); 1206 scsi_done(sc); 1207 atomic64_dec(&fnic_stats->io_stats.active_ios); 1208 if (atomic64_read(&fnic->io_cmpl_skip)) 1209 atomic64_dec(&fnic->io_cmpl_skip); 1210 else 1211 atomic64_inc(&fnic_stats->io_stats.io_completions); 1212 } 1213 } else if (id & FNIC_TAG_DEV_RST) { 1214 /* Completion of device reset */ 1215 CMD_LR_STATUS(sc) = hdr_status; 1216 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1217 spin_unlock_irqrestore(io_lock, flags); 1218 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1219 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1220 sc->device->host->host_no, id, sc, 1221 jiffies_to_msecs(jiffies - start_time), 1222 desc, 0, 1223 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1224 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1225 "Terminate pending " 1226 "dev reset cmpl recd. id %d status %s\n", 1227 (int)(id & FNIC_TAG_MASK), 1228 fnic_fcpio_status_to_str(hdr_status)); 1229 return; 1230 } 1231 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1232 /* Need to wait for terminate completion */ 1233 spin_unlock_irqrestore(io_lock, flags); 1234 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1235 sc->device->host->host_no, id, sc, 1236 jiffies_to_msecs(jiffies - start_time), 1237 desc, 0, 1238 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1239 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1240 "dev reset cmpl recd after time out. " 1241 "id %d status %s\n", 1242 (int)(id & FNIC_TAG_MASK), 1243 fnic_fcpio_status_to_str(hdr_status)); 1244 return; 1245 } 1246 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1247 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1248 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1249 "dev reset cmpl recd. id %d status %s\n", 1250 (int)(id & FNIC_TAG_MASK), 1251 fnic_fcpio_status_to_str(hdr_status)); 1252 if (io_req->dr_done) 1253 complete(io_req->dr_done); 1254 spin_unlock_irqrestore(io_lock, flags); 1255 1256 } else { 1257 shost_printk(KERN_ERR, fnic->lport->host, 1258 "Unexpected itmf io state %s tag %x\n", 1259 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1260 spin_unlock_irqrestore(io_lock, flags); 1261 } 1262 1263 } 1264 1265 /* 1266 * fnic_fcpio_cmpl_handler 1267 * Routine to service the cq for wq_copy 1268 */ 1269 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1270 unsigned int cq_index, 1271 struct fcpio_fw_req *desc) 1272 { 1273 struct fnic *fnic = vnic_dev_priv(vdev); 1274 1275 switch (desc->hdr.type) { 1276 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1277 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1278 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1279 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1280 case FCPIO_RESET_CMPL: /* fw completed reset */ 1281 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1282 break; 1283 default: 1284 break; 1285 } 1286 1287 switch (desc->hdr.type) { 1288 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1289 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1290 break; 1291 1292 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1293 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1294 break; 1295 1296 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1297 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1298 break; 1299 1300 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1301 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1302 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1303 break; 1304 1305 case FCPIO_RESET_CMPL: /* fw completed reset */ 1306 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1307 break; 1308 1309 default: 1310 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1311 "firmware completion type %d\n", 1312 desc->hdr.type); 1313 break; 1314 } 1315 1316 return 0; 1317 } 1318 1319 /* 1320 * fnic_wq_copy_cmpl_handler 1321 * Routine to process wq copy 1322 */ 1323 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1324 { 1325 unsigned int wq_work_done = 0; 1326 unsigned int i, cq_index; 1327 unsigned int cur_work_done; 1328 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1329 u64 start_jiffies = 0; 1330 u64 end_jiffies = 0; 1331 u64 delta_jiffies = 0; 1332 u64 delta_ms = 0; 1333 1334 for (i = 0; i < fnic->wq_copy_count; i++) { 1335 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1336 1337 start_jiffies = jiffies; 1338 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1339 fnic_fcpio_cmpl_handler, 1340 copy_work_to_do); 1341 end_jiffies = jiffies; 1342 1343 wq_work_done += cur_work_done; 1344 delta_jiffies = end_jiffies - start_jiffies; 1345 if (delta_jiffies > 1346 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { 1347 atomic64_set(&misc_stats->max_isr_jiffies, 1348 delta_jiffies); 1349 delta_ms = jiffies_to_msecs(delta_jiffies); 1350 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); 1351 atomic64_set(&misc_stats->corr_work_done, 1352 cur_work_done); 1353 } 1354 } 1355 return wq_work_done; 1356 } 1357 1358 static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data, 1359 bool reserved) 1360 { 1361 const int tag = scsi_cmd_to_rq(sc)->tag; 1362 struct fnic *fnic = data; 1363 struct fnic_io_req *io_req; 1364 unsigned long flags = 0; 1365 spinlock_t *io_lock; 1366 unsigned long start_time = 0; 1367 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1368 1369 io_lock = fnic_io_lock_tag(fnic, tag); 1370 spin_lock_irqsave(io_lock, flags); 1371 1372 io_req = (struct fnic_io_req *)CMD_SP(sc); 1373 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1374 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1375 /* 1376 * We will be here only when FW completes reset 1377 * without sending completions for outstanding ios. 1378 */ 1379 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1380 if (io_req && io_req->dr_done) 1381 complete(io_req->dr_done); 1382 else if (io_req && io_req->abts_done) 1383 complete(io_req->abts_done); 1384 spin_unlock_irqrestore(io_lock, flags); 1385 return true; 1386 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1387 spin_unlock_irqrestore(io_lock, flags); 1388 return true; 1389 } 1390 if (!io_req) { 1391 spin_unlock_irqrestore(io_lock, flags); 1392 goto cleanup_scsi_cmd; 1393 } 1394 1395 CMD_SP(sc) = NULL; 1396 1397 spin_unlock_irqrestore(io_lock, flags); 1398 1399 /* 1400 * If there is a scsi_cmnd associated with this io_req, then 1401 * free the corresponding state 1402 */ 1403 start_time = io_req->start_time; 1404 fnic_release_ioreq_buf(fnic, io_req, sc); 1405 mempool_free(io_req, fnic->io_req_pool); 1406 1407 cleanup_scsi_cmd: 1408 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1409 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1410 "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", 1411 tag, sc, jiffies - start_time); 1412 1413 if (atomic64_read(&fnic->io_cmpl_skip)) 1414 atomic64_dec(&fnic->io_cmpl_skip); 1415 else 1416 atomic64_inc(&fnic_stats->io_stats.io_completions); 1417 1418 /* Complete the command to SCSI */ 1419 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) 1420 shost_printk(KERN_ERR, fnic->lport->host, 1421 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", 1422 tag, sc); 1423 1424 FNIC_TRACE(fnic_cleanup_io, 1425 sc->device->host->host_no, tag, sc, 1426 jiffies_to_msecs(jiffies - start_time), 1427 0, ((u64)sc->cmnd[0] << 32 | 1428 (u64)sc->cmnd[2] << 24 | 1429 (u64)sc->cmnd[3] << 16 | 1430 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1431 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1432 1433 scsi_done(sc); 1434 1435 return true; 1436 } 1437 1438 static void fnic_cleanup_io(struct fnic *fnic) 1439 { 1440 scsi_host_busy_iter(fnic->lport->host, 1441 fnic_cleanup_io_iter, fnic); 1442 } 1443 1444 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1445 struct fcpio_host_req *desc) 1446 { 1447 u32 id; 1448 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1449 struct fnic_io_req *io_req; 1450 struct scsi_cmnd *sc; 1451 unsigned long flags; 1452 spinlock_t *io_lock; 1453 unsigned long start_time = 0; 1454 1455 /* get the tag reference */ 1456 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1457 id &= FNIC_TAG_MASK; 1458 1459 if (id >= fnic->fnic_max_tag_id) 1460 return; 1461 1462 sc = scsi_host_find_tag(fnic->lport->host, id); 1463 if (!sc) 1464 return; 1465 1466 io_lock = fnic_io_lock_hash(fnic, sc); 1467 spin_lock_irqsave(io_lock, flags); 1468 1469 /* Get the IO context which this desc refers to */ 1470 io_req = (struct fnic_io_req *)CMD_SP(sc); 1471 1472 /* fnic interrupts are turned off by now */ 1473 1474 if (!io_req) { 1475 spin_unlock_irqrestore(io_lock, flags); 1476 goto wq_copy_cleanup_scsi_cmd; 1477 } 1478 1479 CMD_SP(sc) = NULL; 1480 1481 spin_unlock_irqrestore(io_lock, flags); 1482 1483 start_time = io_req->start_time; 1484 fnic_release_ioreq_buf(fnic, io_req, sc); 1485 mempool_free(io_req, fnic->io_req_pool); 1486 1487 wq_copy_cleanup_scsi_cmd: 1488 sc->result = DID_NO_CONNECT << 16; 1489 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1490 " DID_NO_CONNECT\n"); 1491 1492 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1493 sc->device->host->host_no, id, sc, 1494 jiffies_to_msecs(jiffies - start_time), 1495 0, ((u64)sc->cmnd[0] << 32 | 1496 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1497 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1498 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1499 1500 scsi_done(sc); 1501 } 1502 1503 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1504 u32 task_req, u8 *fc_lun, 1505 struct fnic_io_req *io_req) 1506 { 1507 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1508 struct Scsi_Host *host = fnic->lport->host; 1509 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1510 unsigned long flags; 1511 1512 spin_lock_irqsave(host->host_lock, flags); 1513 if (unlikely(fnic_chk_state_flags_locked(fnic, 1514 FNIC_FLAGS_IO_BLOCKED))) { 1515 spin_unlock_irqrestore(host->host_lock, flags); 1516 return 1; 1517 } else 1518 atomic_inc(&fnic->in_flight); 1519 spin_unlock_irqrestore(host->host_lock, flags); 1520 1521 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1522 1523 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1524 free_wq_copy_descs(fnic, wq); 1525 1526 if (!vnic_wq_copy_desc_avail(wq)) { 1527 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1528 atomic_dec(&fnic->in_flight); 1529 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1530 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1531 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1532 return 1; 1533 } 1534 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1535 0, task_req, tag, fc_lun, io_req->port_id, 1536 fnic->config.ra_tov, fnic->config.ed_tov); 1537 1538 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1539 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1540 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1541 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1542 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1543 1544 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1545 atomic_dec(&fnic->in_flight); 1546 1547 return 0; 1548 } 1549 1550 struct fnic_rport_abort_io_iter_data { 1551 struct fnic *fnic; 1552 u32 port_id; 1553 int term_cnt; 1554 }; 1555 1556 static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data, 1557 bool reserved) 1558 { 1559 struct fnic_rport_abort_io_iter_data *iter_data = data; 1560 struct fnic *fnic = iter_data->fnic; 1561 int abt_tag = scsi_cmd_to_rq(sc)->tag; 1562 struct fnic_io_req *io_req; 1563 spinlock_t *io_lock; 1564 unsigned long flags; 1565 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1566 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1567 struct scsi_lun fc_lun; 1568 enum fnic_ioreq_state old_ioreq_state; 1569 1570 io_lock = fnic_io_lock_tag(fnic, abt_tag); 1571 spin_lock_irqsave(io_lock, flags); 1572 1573 io_req = (struct fnic_io_req *)CMD_SP(sc); 1574 1575 if (!io_req || io_req->port_id != iter_data->port_id) { 1576 spin_unlock_irqrestore(io_lock, flags); 1577 return true; 1578 } 1579 1580 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1581 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1582 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1583 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1584 sc); 1585 spin_unlock_irqrestore(io_lock, flags); 1586 return true; 1587 } 1588 1589 /* 1590 * Found IO that is still pending with firmware and 1591 * belongs to rport that went away 1592 */ 1593 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1594 spin_unlock_irqrestore(io_lock, flags); 1595 return true; 1596 } 1597 if (io_req->abts_done) { 1598 shost_printk(KERN_ERR, fnic->lport->host, 1599 "fnic_rport_exch_reset: io_req->abts_done is set " 1600 "state is %s\n", 1601 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1602 } 1603 1604 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1605 shost_printk(KERN_ERR, fnic->lport->host, 1606 "rport_exch_reset " 1607 "IO not yet issued %p tag 0x%x flags " 1608 "%x state %d\n", 1609 sc, abt_tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1610 } 1611 old_ioreq_state = CMD_STATE(sc); 1612 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1613 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1614 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1615 atomic64_inc(&reset_stats->device_reset_terminates); 1616 abt_tag |= FNIC_TAG_DEV_RST; 1617 } 1618 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1619 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); 1620 BUG_ON(io_req->abts_done); 1621 1622 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1623 "fnic_rport_reset_exch: Issuing abts\n"); 1624 1625 spin_unlock_irqrestore(io_lock, flags); 1626 1627 /* Now queue the abort command to firmware */ 1628 int_to_scsilun(sc->device->lun, &fc_lun); 1629 1630 if (fnic_queue_abort_io_req(fnic, abt_tag, 1631 FCPIO_ITMF_ABT_TASK_TERM, 1632 fc_lun.scsi_lun, io_req)) { 1633 /* 1634 * Revert the cmd state back to old state, if 1635 * it hasn't changed in between. This cmd will get 1636 * aborted later by scsi_eh, or cleaned up during 1637 * lun reset 1638 */ 1639 spin_lock_irqsave(io_lock, flags); 1640 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1641 CMD_STATE(sc) = old_ioreq_state; 1642 spin_unlock_irqrestore(io_lock, flags); 1643 } else { 1644 spin_lock_irqsave(io_lock, flags); 1645 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1646 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1647 else 1648 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1649 spin_unlock_irqrestore(io_lock, flags); 1650 atomic64_inc(&term_stats->terminates); 1651 iter_data->term_cnt++; 1652 } 1653 return true; 1654 } 1655 1656 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1657 { 1658 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1659 struct fnic_rport_abort_io_iter_data iter_data = { 1660 .fnic = fnic, 1661 .port_id = port_id, 1662 .term_cnt = 0, 1663 }; 1664 1665 FNIC_SCSI_DBG(KERN_DEBUG, 1666 fnic->lport->host, 1667 "fnic_rport_exch_reset called portid 0x%06x\n", 1668 port_id); 1669 1670 if (fnic->in_remove) 1671 return; 1672 1673 scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter, 1674 &iter_data); 1675 if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates)) 1676 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt); 1677 1678 } 1679 1680 void fnic_terminate_rport_io(struct fc_rport *rport) 1681 { 1682 struct fc_rport_libfc_priv *rdata; 1683 struct fc_lport *lport; 1684 struct fnic *fnic; 1685 1686 if (!rport) { 1687 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1688 return; 1689 } 1690 rdata = rport->dd_data; 1691 1692 if (!rdata) { 1693 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1694 return; 1695 } 1696 lport = rdata->local_port; 1697 1698 if (!lport) { 1699 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1700 return; 1701 } 1702 fnic = lport_priv(lport); 1703 FNIC_SCSI_DBG(KERN_DEBUG, 1704 fnic->lport->host, "fnic_terminate_rport_io called" 1705 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1706 rport->port_name, rport->node_name, rport, 1707 rport->port_id); 1708 1709 if (fnic->in_remove) 1710 return; 1711 1712 fnic_rport_exch_reset(fnic, rport->port_id); 1713 } 1714 1715 /* 1716 * This function is exported to SCSI for sending abort cmnds. 1717 * A SCSI IO is represented by a io_req in the driver. 1718 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1719 */ 1720 int fnic_abort_cmd(struct scsi_cmnd *sc) 1721 { 1722 struct request *const rq = scsi_cmd_to_rq(sc); 1723 struct fc_lport *lp; 1724 struct fnic *fnic; 1725 struct fnic_io_req *io_req = NULL; 1726 struct fc_rport *rport; 1727 spinlock_t *io_lock; 1728 unsigned long flags; 1729 unsigned long start_time = 0; 1730 int ret = SUCCESS; 1731 u32 task_req = 0; 1732 struct scsi_lun fc_lun; 1733 struct fnic_stats *fnic_stats; 1734 struct abort_stats *abts_stats; 1735 struct terminate_stats *term_stats; 1736 enum fnic_ioreq_state old_ioreq_state; 1737 const int tag = rq->tag; 1738 unsigned long abt_issued_time; 1739 DECLARE_COMPLETION_ONSTACK(tm_done); 1740 1741 /* Wait for rport to unblock */ 1742 fc_block_scsi_eh(sc); 1743 1744 /* Get local-port, check ready and link up */ 1745 lp = shost_priv(sc->device->host); 1746 1747 fnic = lport_priv(lp); 1748 fnic_stats = &fnic->fnic_stats; 1749 abts_stats = &fnic->fnic_stats.abts_stats; 1750 term_stats = &fnic->fnic_stats.term_stats; 1751 1752 rport = starget_to_rport(scsi_target(sc->device)); 1753 FNIC_SCSI_DBG(KERN_DEBUG, 1754 fnic->lport->host, 1755 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1756 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1757 1758 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1759 1760 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1761 ret = FAILED; 1762 goto fnic_abort_cmd_end; 1763 } 1764 1765 /* 1766 * Avoid a race between SCSI issuing the abort and the device 1767 * completing the command. 1768 * 1769 * If the command is already completed by the fw cmpl code, 1770 * we just return SUCCESS from here. This means that the abort 1771 * succeeded. In the SCSI ML, since the timeout for command has 1772 * happened, the completion wont actually complete the command 1773 * and it will be considered as an aborted command 1774 * 1775 * The CMD_SP will not be cleared except while holding io_req_lock. 1776 */ 1777 io_lock = fnic_io_lock_hash(fnic, sc); 1778 spin_lock_irqsave(io_lock, flags); 1779 io_req = (struct fnic_io_req *)CMD_SP(sc); 1780 if (!io_req) { 1781 spin_unlock_irqrestore(io_lock, flags); 1782 goto fnic_abort_cmd_end; 1783 } 1784 1785 io_req->abts_done = &tm_done; 1786 1787 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1788 spin_unlock_irqrestore(io_lock, flags); 1789 goto wait_pending; 1790 } 1791 1792 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1793 if (abt_issued_time <= 6000) 1794 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1795 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1796 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1797 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1798 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1799 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1800 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1801 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1802 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1803 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1804 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1805 else 1806 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1807 1808 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1809 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1810 /* 1811 * Command is still pending, need to abort it 1812 * If the firmware completes the command after this point, 1813 * the completion wont be done till mid-layer, since abort 1814 * has already started. 1815 */ 1816 old_ioreq_state = CMD_STATE(sc); 1817 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1818 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1819 1820 spin_unlock_irqrestore(io_lock, flags); 1821 1822 /* 1823 * Check readiness of the remote port. If the path to remote 1824 * port is up, then send abts to the remote port to terminate 1825 * the IO. Else, just locally terminate the IO in the firmware 1826 */ 1827 if (fc_remote_port_chkready(rport) == 0) 1828 task_req = FCPIO_ITMF_ABT_TASK; 1829 else { 1830 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1831 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1832 } 1833 1834 /* Now queue the abort command to firmware */ 1835 int_to_scsilun(sc->device->lun, &fc_lun); 1836 1837 if (fnic_queue_abort_io_req(fnic, tag, task_req, fc_lun.scsi_lun, 1838 io_req)) { 1839 spin_lock_irqsave(io_lock, flags); 1840 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1841 CMD_STATE(sc) = old_ioreq_state; 1842 io_req = (struct fnic_io_req *)CMD_SP(sc); 1843 if (io_req) 1844 io_req->abts_done = NULL; 1845 spin_unlock_irqrestore(io_lock, flags); 1846 ret = FAILED; 1847 goto fnic_abort_cmd_end; 1848 } 1849 if (task_req == FCPIO_ITMF_ABT_TASK) { 1850 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1851 atomic64_inc(&fnic_stats->abts_stats.aborts); 1852 } else { 1853 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1854 atomic64_inc(&fnic_stats->term_stats.terminates); 1855 } 1856 1857 /* 1858 * We queued an abort IO, wait for its completion. 1859 * Once the firmware completes the abort command, it will 1860 * wake up this thread. 1861 */ 1862 wait_pending: 1863 wait_for_completion_timeout(&tm_done, 1864 msecs_to_jiffies 1865 (2 * fnic->config.ra_tov + 1866 fnic->config.ed_tov)); 1867 1868 /* Check the abort status */ 1869 spin_lock_irqsave(io_lock, flags); 1870 1871 io_req = (struct fnic_io_req *)CMD_SP(sc); 1872 if (!io_req) { 1873 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1874 spin_unlock_irqrestore(io_lock, flags); 1875 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1876 ret = FAILED; 1877 goto fnic_abort_cmd_end; 1878 } 1879 io_req->abts_done = NULL; 1880 1881 /* fw did not complete abort, timed out */ 1882 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1883 spin_unlock_irqrestore(io_lock, flags); 1884 if (task_req == FCPIO_ITMF_ABT_TASK) { 1885 atomic64_inc(&abts_stats->abort_drv_timeouts); 1886 } else { 1887 atomic64_inc(&term_stats->terminate_drv_timeouts); 1888 } 1889 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 1890 ret = FAILED; 1891 goto fnic_abort_cmd_end; 1892 } 1893 1894 /* IO out of order */ 1895 1896 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1897 spin_unlock_irqrestore(io_lock, flags); 1898 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1899 "Issuing Host reset due to out of order IO\n"); 1900 1901 ret = FAILED; 1902 goto fnic_abort_cmd_end; 1903 } 1904 1905 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1906 1907 start_time = io_req->start_time; 1908 /* 1909 * firmware completed the abort, check the status, 1910 * free the io_req if successful. If abort fails, 1911 * Device reset will clean the I/O. 1912 */ 1913 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) 1914 CMD_SP(sc) = NULL; 1915 else { 1916 ret = FAILED; 1917 spin_unlock_irqrestore(io_lock, flags); 1918 goto fnic_abort_cmd_end; 1919 } 1920 1921 spin_unlock_irqrestore(io_lock, flags); 1922 1923 fnic_release_ioreq_buf(fnic, io_req, sc); 1924 mempool_free(io_req, fnic->io_req_pool); 1925 1926 /* Call SCSI completion function to complete the IO */ 1927 sc->result = DID_ABORT << 16; 1928 scsi_done(sc); 1929 atomic64_dec(&fnic_stats->io_stats.active_ios); 1930 if (atomic64_read(&fnic->io_cmpl_skip)) 1931 atomic64_dec(&fnic->io_cmpl_skip); 1932 else 1933 atomic64_inc(&fnic_stats->io_stats.io_completions); 1934 1935 fnic_abort_cmd_end: 1936 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, tag, sc, 1937 jiffies_to_msecs(jiffies - start_time), 1938 0, ((u64)sc->cmnd[0] << 32 | 1939 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1940 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1941 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1942 1943 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1944 "Returning from abort cmd type %x %s\n", task_req, 1945 (ret == SUCCESS) ? 1946 "SUCCESS" : "FAILED"); 1947 return ret; 1948 } 1949 1950 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 1951 struct scsi_cmnd *sc, 1952 struct fnic_io_req *io_req) 1953 { 1954 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1955 struct Scsi_Host *host = fnic->lport->host; 1956 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1957 struct scsi_lun fc_lun; 1958 int ret = 0; 1959 unsigned long intr_flags; 1960 1961 spin_lock_irqsave(host->host_lock, intr_flags); 1962 if (unlikely(fnic_chk_state_flags_locked(fnic, 1963 FNIC_FLAGS_IO_BLOCKED))) { 1964 spin_unlock_irqrestore(host->host_lock, intr_flags); 1965 return FAILED; 1966 } else 1967 atomic_inc(&fnic->in_flight); 1968 spin_unlock_irqrestore(host->host_lock, intr_flags); 1969 1970 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 1971 1972 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1973 free_wq_copy_descs(fnic, wq); 1974 1975 if (!vnic_wq_copy_desc_avail(wq)) { 1976 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1977 "queue_dr_io_req failure - no descriptors\n"); 1978 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 1979 ret = -EAGAIN; 1980 goto lr_io_req_end; 1981 } 1982 1983 /* fill in the lun info */ 1984 int_to_scsilun(sc->device->lun, &fc_lun); 1985 1986 fnic_queue_wq_copy_desc_itmf(wq, scsi_cmd_to_rq(sc)->tag | FNIC_TAG_DEV_RST, 1987 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 1988 fc_lun.scsi_lun, io_req->port_id, 1989 fnic->config.ra_tov, fnic->config.ed_tov); 1990 1991 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1992 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1993 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1994 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1995 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1996 1997 lr_io_req_end: 1998 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 1999 atomic_dec(&fnic->in_flight); 2000 2001 return ret; 2002 } 2003 2004 struct fnic_pending_aborts_iter_data { 2005 struct fnic *fnic; 2006 struct scsi_cmnd *lr_sc; 2007 struct scsi_device *lun_dev; 2008 int ret; 2009 }; 2010 2011 static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, 2012 void *data, bool reserved) 2013 { 2014 struct fnic_pending_aborts_iter_data *iter_data = data; 2015 struct fnic *fnic = iter_data->fnic; 2016 struct scsi_device *lun_dev = iter_data->lun_dev; 2017 int abt_tag = scsi_cmd_to_rq(sc)->tag; 2018 struct fnic_io_req *io_req; 2019 spinlock_t *io_lock; 2020 unsigned long flags; 2021 struct scsi_lun fc_lun; 2022 DECLARE_COMPLETION_ONSTACK(tm_done); 2023 enum fnic_ioreq_state old_ioreq_state; 2024 2025 if (sc == iter_data->lr_sc || sc->device != lun_dev) 2026 return true; 2027 if (reserved) 2028 return true; 2029 2030 io_lock = fnic_io_lock_tag(fnic, abt_tag); 2031 spin_lock_irqsave(io_lock, flags); 2032 io_req = (struct fnic_io_req *)CMD_SP(sc); 2033 if (!io_req) { 2034 spin_unlock_irqrestore(io_lock, flags); 2035 return true; 2036 } 2037 2038 /* 2039 * Found IO that is still pending with firmware and 2040 * belongs to the LUN that we are resetting 2041 */ 2042 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2043 "Found IO in %s on lun\n", 2044 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2045 2046 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2047 spin_unlock_irqrestore(io_lock, flags); 2048 return true; 2049 } 2050 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 2051 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 2052 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2053 "%s dev rst not pending sc 0x%p\n", __func__, 2054 sc); 2055 spin_unlock_irqrestore(io_lock, flags); 2056 return true; 2057 } 2058 2059 if (io_req->abts_done) 2060 shost_printk(KERN_ERR, fnic->lport->host, 2061 "%s: io_req->abts_done is set state is %s\n", 2062 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 2063 old_ioreq_state = CMD_STATE(sc); 2064 /* 2065 * Any pending IO issued prior to reset is expected to be 2066 * in abts pending state, if not we need to set 2067 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2068 * When IO is completed, the IO will be handed over and 2069 * handled in this function. 2070 */ 2071 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2072 2073 BUG_ON(io_req->abts_done); 2074 2075 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 2076 abt_tag |= FNIC_TAG_DEV_RST; 2077 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2078 "%s: dev rst sc 0x%p\n", __func__, sc); 2079 } 2080 2081 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 2082 io_req->abts_done = &tm_done; 2083 spin_unlock_irqrestore(io_lock, flags); 2084 2085 /* Now queue the abort command to firmware */ 2086 int_to_scsilun(sc->device->lun, &fc_lun); 2087 2088 if (fnic_queue_abort_io_req(fnic, abt_tag, 2089 FCPIO_ITMF_ABT_TASK_TERM, 2090 fc_lun.scsi_lun, io_req)) { 2091 spin_lock_irqsave(io_lock, flags); 2092 io_req = (struct fnic_io_req *)CMD_SP(sc); 2093 if (io_req) 2094 io_req->abts_done = NULL; 2095 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2096 CMD_STATE(sc) = old_ioreq_state; 2097 spin_unlock_irqrestore(io_lock, flags); 2098 iter_data->ret = FAILED; 2099 return false; 2100 } else { 2101 spin_lock_irqsave(io_lock, flags); 2102 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 2103 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2104 spin_unlock_irqrestore(io_lock, flags); 2105 } 2106 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 2107 2108 wait_for_completion_timeout(&tm_done, msecs_to_jiffies 2109 (fnic->config.ed_tov)); 2110 2111 /* Recheck cmd state to check if it is now aborted */ 2112 spin_lock_irqsave(io_lock, flags); 2113 io_req = (struct fnic_io_req *)CMD_SP(sc); 2114 if (!io_req) { 2115 spin_unlock_irqrestore(io_lock, flags); 2116 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 2117 return true; 2118 } 2119 2120 io_req->abts_done = NULL; 2121 2122 /* if abort is still pending with fw, fail */ 2123 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 2124 spin_unlock_irqrestore(io_lock, flags); 2125 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 2126 iter_data->ret = FAILED; 2127 return false; 2128 } 2129 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2130 2131 /* original sc used for lr is handled by dev reset code */ 2132 if (sc != iter_data->lr_sc) 2133 CMD_SP(sc) = NULL; 2134 spin_unlock_irqrestore(io_lock, flags); 2135 2136 /* original sc used for lr is handled by dev reset code */ 2137 if (sc != iter_data->lr_sc) { 2138 fnic_release_ioreq_buf(fnic, io_req, sc); 2139 mempool_free(io_req, fnic->io_req_pool); 2140 } 2141 2142 /* 2143 * Any IO is returned during reset, it needs to call scsi_done 2144 * to return the scsi_cmnd to upper layer. 2145 */ 2146 /* Set result to let upper SCSI layer retry */ 2147 sc->result = DID_RESET << 16; 2148 scsi_done(sc); 2149 2150 return true; 2151 } 2152 2153 /* 2154 * Clean up any pending aborts on the lun 2155 * For each outstanding IO on this lun, whose abort is not completed by fw, 2156 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2157 * successfully aborted, 1 otherwise 2158 */ 2159 static int fnic_clean_pending_aborts(struct fnic *fnic, 2160 struct scsi_cmnd *lr_sc, 2161 bool new_sc) 2162 2163 { 2164 int ret = SUCCESS; 2165 struct fnic_pending_aborts_iter_data iter_data = { 2166 .fnic = fnic, 2167 .lun_dev = lr_sc->device, 2168 .ret = SUCCESS, 2169 }; 2170 2171 if (new_sc) 2172 iter_data.lr_sc = lr_sc; 2173 2174 scsi_host_busy_iter(fnic->lport->host, 2175 fnic_pending_aborts_iter, &iter_data); 2176 if (iter_data.ret == FAILED) { 2177 ret = iter_data.ret; 2178 goto clean_pending_aborts_end; 2179 } 2180 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2181 2182 /* walk again to check, if IOs are still pending in fw */ 2183 if (fnic_is_abts_pending(fnic, lr_sc)) 2184 ret = FAILED; 2185 2186 clean_pending_aborts_end: 2187 return ret; 2188 } 2189 2190 /* 2191 * fnic_scsi_host_start_tag 2192 * Allocates tagid from host's tag list 2193 **/ 2194 static inline int 2195 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2196 { 2197 struct request *rq = scsi_cmd_to_rq(sc); 2198 struct request_queue *q = rq->q; 2199 struct request *dummy; 2200 2201 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); 2202 if (IS_ERR(dummy)) 2203 return SCSI_NO_TAG; 2204 2205 rq->tag = dummy->tag; 2206 sc->host_scribble = (unsigned char *)dummy; 2207 2208 return dummy->tag; 2209 } 2210 2211 /* 2212 * fnic_scsi_host_end_tag 2213 * frees tag allocated by fnic_scsi_host_start_tag. 2214 **/ 2215 static inline void 2216 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2217 { 2218 struct request *dummy = (struct request *)sc->host_scribble; 2219 2220 blk_mq_free_request(dummy); 2221 } 2222 2223 /* 2224 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2225 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2226 * on the LUN. 2227 */ 2228 int fnic_device_reset(struct scsi_cmnd *sc) 2229 { 2230 struct request *rq = scsi_cmd_to_rq(sc); 2231 struct fc_lport *lp; 2232 struct fnic *fnic; 2233 struct fnic_io_req *io_req = NULL; 2234 struct fc_rport *rport; 2235 int status; 2236 int ret = FAILED; 2237 spinlock_t *io_lock; 2238 unsigned long flags; 2239 unsigned long start_time = 0; 2240 struct scsi_lun fc_lun; 2241 struct fnic_stats *fnic_stats; 2242 struct reset_stats *reset_stats; 2243 int tag = rq->tag; 2244 DECLARE_COMPLETION_ONSTACK(tm_done); 2245 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2246 bool new_sc = 0; 2247 2248 /* Wait for rport to unblock */ 2249 fc_block_scsi_eh(sc); 2250 2251 /* Get local-port, check ready and link up */ 2252 lp = shost_priv(sc->device->host); 2253 2254 fnic = lport_priv(lp); 2255 fnic_stats = &fnic->fnic_stats; 2256 reset_stats = &fnic->fnic_stats.reset_stats; 2257 2258 atomic64_inc(&reset_stats->device_resets); 2259 2260 rport = starget_to_rport(scsi_target(sc->device)); 2261 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2262 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2263 rport->port_id, sc->device->lun, sc); 2264 2265 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2266 goto fnic_device_reset_end; 2267 2268 /* Check if remote port up */ 2269 if (fc_remote_port_chkready(rport)) { 2270 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2271 goto fnic_device_reset_end; 2272 } 2273 2274 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2275 /* Allocate tag if not present */ 2276 2277 if (unlikely(tag < 0)) { 2278 /* 2279 * Really should fix the midlayer to pass in a proper 2280 * request for ioctls... 2281 */ 2282 tag = fnic_scsi_host_start_tag(fnic, sc); 2283 if (unlikely(tag == SCSI_NO_TAG)) 2284 goto fnic_device_reset_end; 2285 tag_gen_flag = 1; 2286 new_sc = 1; 2287 } 2288 io_lock = fnic_io_lock_hash(fnic, sc); 2289 spin_lock_irqsave(io_lock, flags); 2290 io_req = (struct fnic_io_req *)CMD_SP(sc); 2291 2292 /* 2293 * If there is a io_req attached to this command, then use it, 2294 * else allocate a new one. 2295 */ 2296 if (!io_req) { 2297 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2298 if (!io_req) { 2299 spin_unlock_irqrestore(io_lock, flags); 2300 goto fnic_device_reset_end; 2301 } 2302 memset(io_req, 0, sizeof(*io_req)); 2303 io_req->port_id = rport->port_id; 2304 CMD_SP(sc) = (char *)io_req; 2305 } 2306 io_req->dr_done = &tm_done; 2307 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2308 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2309 spin_unlock_irqrestore(io_lock, flags); 2310 2311 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2312 2313 /* 2314 * issue the device reset, if enqueue failed, clean up the ioreq 2315 * and break assoc with scsi cmd 2316 */ 2317 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2318 spin_lock_irqsave(io_lock, flags); 2319 io_req = (struct fnic_io_req *)CMD_SP(sc); 2320 if (io_req) 2321 io_req->dr_done = NULL; 2322 goto fnic_device_reset_clean; 2323 } 2324 spin_lock_irqsave(io_lock, flags); 2325 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2326 spin_unlock_irqrestore(io_lock, flags); 2327 2328 /* 2329 * Wait on the local completion for LUN reset. The io_req may be 2330 * freed while we wait since we hold no lock. 2331 */ 2332 wait_for_completion_timeout(&tm_done, 2333 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2334 2335 spin_lock_irqsave(io_lock, flags); 2336 io_req = (struct fnic_io_req *)CMD_SP(sc); 2337 if (!io_req) { 2338 spin_unlock_irqrestore(io_lock, flags); 2339 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2340 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2341 goto fnic_device_reset_end; 2342 } 2343 io_req->dr_done = NULL; 2344 2345 status = CMD_LR_STATUS(sc); 2346 2347 /* 2348 * If lun reset not completed, bail out with failed. io_req 2349 * gets cleaned up during higher levels of EH 2350 */ 2351 if (status == FCPIO_INVALID_CODE) { 2352 atomic64_inc(&reset_stats->device_reset_timeouts); 2353 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2354 "Device reset timed out\n"); 2355 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2356 spin_unlock_irqrestore(io_lock, flags); 2357 int_to_scsilun(sc->device->lun, &fc_lun); 2358 /* 2359 * Issue abort and terminate on device reset request. 2360 * If q'ing of terminate fails, retry it after a delay. 2361 */ 2362 while (1) { 2363 spin_lock_irqsave(io_lock, flags); 2364 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2365 spin_unlock_irqrestore(io_lock, flags); 2366 break; 2367 } 2368 spin_unlock_irqrestore(io_lock, flags); 2369 if (fnic_queue_abort_io_req(fnic, 2370 tag | FNIC_TAG_DEV_RST, 2371 FCPIO_ITMF_ABT_TASK_TERM, 2372 fc_lun.scsi_lun, io_req)) { 2373 wait_for_completion_timeout(&tm_done, 2374 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2375 } else { 2376 spin_lock_irqsave(io_lock, flags); 2377 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2378 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2379 io_req->abts_done = &tm_done; 2380 spin_unlock_irqrestore(io_lock, flags); 2381 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2382 "Abort and terminate issued on Device reset " 2383 "tag 0x%x sc 0x%p\n", tag, sc); 2384 break; 2385 } 2386 } 2387 while (1) { 2388 spin_lock_irqsave(io_lock, flags); 2389 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2390 spin_unlock_irqrestore(io_lock, flags); 2391 wait_for_completion_timeout(&tm_done, 2392 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2393 break; 2394 } else { 2395 io_req = (struct fnic_io_req *)CMD_SP(sc); 2396 io_req->abts_done = NULL; 2397 goto fnic_device_reset_clean; 2398 } 2399 } 2400 } else { 2401 spin_unlock_irqrestore(io_lock, flags); 2402 } 2403 2404 /* Completed, but not successful, clean up the io_req, return fail */ 2405 if (status != FCPIO_SUCCESS) { 2406 spin_lock_irqsave(io_lock, flags); 2407 FNIC_SCSI_DBG(KERN_DEBUG, 2408 fnic->lport->host, 2409 "Device reset completed - failed\n"); 2410 io_req = (struct fnic_io_req *)CMD_SP(sc); 2411 goto fnic_device_reset_clean; 2412 } 2413 2414 /* 2415 * Clean up any aborts on this lun that have still not 2416 * completed. If any of these fail, then LUN reset fails. 2417 * clean_pending_aborts cleans all cmds on this lun except 2418 * the lun reset cmd. If all cmds get cleaned, the lun reset 2419 * succeeds 2420 */ 2421 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2422 spin_lock_irqsave(io_lock, flags); 2423 io_req = (struct fnic_io_req *)CMD_SP(sc); 2424 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2425 "Device reset failed" 2426 " since could not abort all IOs\n"); 2427 goto fnic_device_reset_clean; 2428 } 2429 2430 /* Clean lun reset command */ 2431 spin_lock_irqsave(io_lock, flags); 2432 io_req = (struct fnic_io_req *)CMD_SP(sc); 2433 if (io_req) 2434 /* Completed, and successful */ 2435 ret = SUCCESS; 2436 2437 fnic_device_reset_clean: 2438 if (io_req) 2439 CMD_SP(sc) = NULL; 2440 2441 spin_unlock_irqrestore(io_lock, flags); 2442 2443 if (io_req) { 2444 start_time = io_req->start_time; 2445 fnic_release_ioreq_buf(fnic, io_req, sc); 2446 mempool_free(io_req, fnic->io_req_pool); 2447 } 2448 2449 fnic_device_reset_end: 2450 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc, 2451 jiffies_to_msecs(jiffies - start_time), 2452 0, ((u64)sc->cmnd[0] << 32 | 2453 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2454 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2455 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2456 2457 /* free tag if it is allocated */ 2458 if (unlikely(tag_gen_flag)) 2459 fnic_scsi_host_end_tag(fnic, sc); 2460 2461 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2462 "Returning from device reset %s\n", 2463 (ret == SUCCESS) ? 2464 "SUCCESS" : "FAILED"); 2465 2466 if (ret == FAILED) 2467 atomic64_inc(&reset_stats->device_reset_failures); 2468 2469 return ret; 2470 } 2471 2472 /* Clean up all IOs, clean up libFC local port */ 2473 int fnic_reset(struct Scsi_Host *shost) 2474 { 2475 struct fc_lport *lp; 2476 struct fnic *fnic; 2477 int ret = 0; 2478 struct reset_stats *reset_stats; 2479 2480 lp = shost_priv(shost); 2481 fnic = lport_priv(lp); 2482 reset_stats = &fnic->fnic_stats.reset_stats; 2483 2484 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2485 "fnic_reset called\n"); 2486 2487 atomic64_inc(&reset_stats->fnic_resets); 2488 2489 /* 2490 * Reset local port, this will clean up libFC exchanges, 2491 * reset remote port sessions, and if link is up, begin flogi 2492 */ 2493 ret = fc_lport_reset(lp); 2494 2495 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2496 "Returning from fnic reset %s\n", 2497 (ret == 0) ? 2498 "SUCCESS" : "FAILED"); 2499 2500 if (ret == 0) 2501 atomic64_inc(&reset_stats->fnic_reset_completions); 2502 else 2503 atomic64_inc(&reset_stats->fnic_reset_failures); 2504 2505 return ret; 2506 } 2507 2508 /* 2509 * SCSI Error handling calls driver's eh_host_reset if all prior 2510 * error handling levels return FAILED. If host reset completes 2511 * successfully, and if link is up, then Fabric login begins. 2512 * 2513 * Host Reset is the highest level of error recovery. If this fails, then 2514 * host is offlined by SCSI. 2515 * 2516 */ 2517 int fnic_host_reset(struct scsi_cmnd *sc) 2518 { 2519 int ret; 2520 unsigned long wait_host_tmo; 2521 struct Scsi_Host *shost = sc->device->host; 2522 struct fc_lport *lp = shost_priv(shost); 2523 struct fnic *fnic = lport_priv(lp); 2524 unsigned long flags; 2525 2526 spin_lock_irqsave(&fnic->fnic_lock, flags); 2527 if (!fnic->internal_reset_inprogress) { 2528 fnic->internal_reset_inprogress = true; 2529 } else { 2530 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2531 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2532 "host reset in progress skipping another host reset\n"); 2533 return SUCCESS; 2534 } 2535 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2536 2537 /* 2538 * If fnic_reset is successful, wait for fabric login to complete 2539 * scsi-ml tries to send a TUR to every device if host reset is 2540 * successful, so before returning to scsi, fabric should be up 2541 */ 2542 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2543 if (ret == SUCCESS) { 2544 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2545 ret = FAILED; 2546 while (time_before(jiffies, wait_host_tmo)) { 2547 if ((lp->state == LPORT_ST_READY) && 2548 (lp->link_up)) { 2549 ret = SUCCESS; 2550 break; 2551 } 2552 ssleep(1); 2553 } 2554 } 2555 2556 spin_lock_irqsave(&fnic->fnic_lock, flags); 2557 fnic->internal_reset_inprogress = false; 2558 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2559 return ret; 2560 } 2561 2562 /* 2563 * This fxn is called from libFC when host is removed 2564 */ 2565 void fnic_scsi_abort_io(struct fc_lport *lp) 2566 { 2567 int err = 0; 2568 unsigned long flags; 2569 enum fnic_state old_state; 2570 struct fnic *fnic = lport_priv(lp); 2571 DECLARE_COMPLETION_ONSTACK(remove_wait); 2572 2573 /* Issue firmware reset for fnic, wait for reset to complete */ 2574 retry_fw_reset: 2575 spin_lock_irqsave(&fnic->fnic_lock, flags); 2576 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) && 2577 fnic->link_events) { 2578 /* fw reset is in progress, poll for its completion */ 2579 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2580 schedule_timeout(msecs_to_jiffies(100)); 2581 goto retry_fw_reset; 2582 } 2583 2584 fnic->remove_wait = &remove_wait; 2585 old_state = fnic->state; 2586 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2587 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2588 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2589 2590 err = fnic_fw_reset_handler(fnic); 2591 if (err) { 2592 spin_lock_irqsave(&fnic->fnic_lock, flags); 2593 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2594 fnic->state = old_state; 2595 fnic->remove_wait = NULL; 2596 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2597 return; 2598 } 2599 2600 /* Wait for firmware reset to complete */ 2601 wait_for_completion_timeout(&remove_wait, 2602 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2603 2604 spin_lock_irqsave(&fnic->fnic_lock, flags); 2605 fnic->remove_wait = NULL; 2606 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2607 "fnic_scsi_abort_io %s\n", 2608 (fnic->state == FNIC_IN_ETH_MODE) ? 2609 "SUCCESS" : "FAILED"); 2610 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2611 2612 } 2613 2614 /* 2615 * This fxn called from libFC to clean up driver IO state on link down 2616 */ 2617 void fnic_scsi_cleanup(struct fc_lport *lp) 2618 { 2619 unsigned long flags; 2620 enum fnic_state old_state; 2621 struct fnic *fnic = lport_priv(lp); 2622 2623 /* issue fw reset */ 2624 retry_fw_reset: 2625 spin_lock_irqsave(&fnic->fnic_lock, flags); 2626 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2627 /* fw reset is in progress, poll for its completion */ 2628 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2629 schedule_timeout(msecs_to_jiffies(100)); 2630 goto retry_fw_reset; 2631 } 2632 old_state = fnic->state; 2633 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2634 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2635 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2636 2637 if (fnic_fw_reset_handler(fnic)) { 2638 spin_lock_irqsave(&fnic->fnic_lock, flags); 2639 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2640 fnic->state = old_state; 2641 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2642 } 2643 2644 } 2645 2646 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2647 { 2648 } 2649 2650 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2651 { 2652 struct fnic *fnic = lport_priv(lp); 2653 2654 /* Non-zero sid, nothing to do */ 2655 if (sid) 2656 goto call_fc_exch_mgr_reset; 2657 2658 if (did) { 2659 fnic_rport_exch_reset(fnic, did); 2660 goto call_fc_exch_mgr_reset; 2661 } 2662 2663 /* 2664 * sid = 0, did = 0 2665 * link down or device being removed 2666 */ 2667 if (!fnic->in_remove) 2668 fnic_scsi_cleanup(lp); 2669 else 2670 fnic_scsi_abort_io(lp); 2671 2672 /* call libFC exch mgr reset to reset its exchanges */ 2673 call_fc_exch_mgr_reset: 2674 fc_exch_mgr_reset(lp, sid, did); 2675 2676 } 2677 2678 static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data, 2679 bool reserved) 2680 { 2681 struct fnic_pending_aborts_iter_data *iter_data = data; 2682 struct fnic *fnic = iter_data->fnic; 2683 int cmd_state; 2684 struct fnic_io_req *io_req; 2685 spinlock_t *io_lock; 2686 unsigned long flags; 2687 2688 /* 2689 * ignore this lun reset cmd or cmds that do not belong to 2690 * this lun 2691 */ 2692 if (iter_data->lr_sc && sc == iter_data->lr_sc) 2693 return true; 2694 if (iter_data->lun_dev && sc->device != iter_data->lun_dev) 2695 return true; 2696 2697 io_lock = fnic_io_lock_hash(fnic, sc); 2698 spin_lock_irqsave(io_lock, flags); 2699 2700 io_req = (struct fnic_io_req *)CMD_SP(sc); 2701 if (!io_req) { 2702 spin_unlock_irqrestore(io_lock, flags); 2703 return true; 2704 } 2705 2706 /* 2707 * Found IO that is still pending with firmware and 2708 * belongs to the LUN that we are resetting 2709 */ 2710 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2711 "Found IO in %s on lun\n", 2712 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2713 cmd_state = CMD_STATE(sc); 2714 spin_unlock_irqrestore(io_lock, flags); 2715 if (cmd_state == FNIC_IOREQ_ABTS_PENDING) 2716 iter_data->ret = 1; 2717 2718 return iter_data->ret ? false : true; 2719 } 2720 2721 /* 2722 * fnic_is_abts_pending() is a helper function that 2723 * walks through tag map to check if there is any IOs pending,if there is one, 2724 * then it returns 1 (true), otherwise 0 (false) 2725 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2726 * otherwise, it checks for all IOs. 2727 */ 2728 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2729 { 2730 struct fnic_pending_aborts_iter_data iter_data = { 2731 .fnic = fnic, 2732 .lun_dev = NULL, 2733 .ret = 0, 2734 }; 2735 2736 if (lr_sc) { 2737 iter_data.lun_dev = lr_sc->device; 2738 iter_data.lr_sc = lr_sc; 2739 } 2740 2741 /* walk again to check, if IOs are still pending in fw */ 2742 scsi_host_busy_iter(fnic->lport->host, 2743 fnic_abts_pending_iter, &iter_data); 2744 2745 return iter_data.ret; 2746 } 2747