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 = sc->request->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, sc->request->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 struct fc_lport *lp = shost_priv(sc->device->host); 426 struct fc_rport *rport; 427 struct fnic_io_req *io_req = NULL; 428 struct fnic *fnic = lport_priv(lp); 429 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 430 struct vnic_wq_copy *wq; 431 int ret; 432 u64 cmd_trace; 433 int sg_count = 0; 434 unsigned long flags = 0; 435 unsigned long ptr; 436 spinlock_t *io_lock = NULL; 437 int io_lock_acquired = 0; 438 struct fc_rport_libfc_priv *rp; 439 440 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 441 return SCSI_MLQUEUE_HOST_BUSY; 442 443 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) 444 return SCSI_MLQUEUE_HOST_BUSY; 445 446 rport = starget_to_rport(scsi_target(sc->device)); 447 if (!rport) { 448 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 449 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 450 sc->result = DID_NO_CONNECT << 16; 451 done(sc); 452 return 0; 453 } 454 455 ret = fc_remote_port_chkready(rport); 456 if (ret) { 457 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 458 "rport is not ready\n"); 459 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 460 sc->result = ret; 461 done(sc); 462 return 0; 463 } 464 465 rp = rport->dd_data; 466 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 467 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 468 "rport 0x%x removed, returning DID_NO_CONNECT\n", 469 rport->port_id); 470 471 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 472 sc->result = DID_NO_CONNECT<<16; 473 done(sc); 474 return 0; 475 } 476 477 if (rp->rp_state != RPORT_ST_READY) { 478 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 479 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 480 rport->port_id, rp->rp_state); 481 482 sc->result = DID_IMM_RETRY << 16; 483 done(sc); 484 return 0; 485 } 486 487 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 488 return SCSI_MLQUEUE_HOST_BUSY; 489 490 atomic_inc(&fnic->in_flight); 491 492 /* 493 * Release host lock, use driver resource specific locks from here. 494 * Don't re-enable interrupts in case they were disabled prior to the 495 * caller disabling them. 496 */ 497 spin_unlock(lp->host->host_lock); 498 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 499 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 500 501 /* Get a new io_req for this SCSI IO */ 502 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 503 if (!io_req) { 504 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 505 ret = SCSI_MLQUEUE_HOST_BUSY; 506 goto out; 507 } 508 memset(io_req, 0, sizeof(*io_req)); 509 510 /* Map the data buffer */ 511 sg_count = scsi_dma_map(sc); 512 if (sg_count < 0) { 513 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 514 sc->request->tag, sc, 0, sc->cmnd[0], 515 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 sc->scsi_done = done; 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 sc->request->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 sc->request->tag, sc, io_req, 607 sg_count, cmd_trace, 608 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); 609 610 /* if only we issued IO, will we have the io lock */ 611 if (io_lock_acquired) 612 spin_unlock_irqrestore(io_lock, flags); 613 614 atomic_dec(&fnic->in_flight); 615 /* acquire host lock before returning to SCSI */ 616 spin_lock(lp->host->host_lock); 617 return ret; 618 } 619 620 DEF_SCSI_QCMD(fnic_queuecommand) 621 622 /* 623 * fnic_fcpio_fw_reset_cmpl_handler 624 * Routine to handle fw reset completion 625 */ 626 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 627 struct fcpio_fw_req *desc) 628 { 629 u8 type; 630 u8 hdr_status; 631 struct fcpio_tag tag; 632 int ret = 0; 633 unsigned long flags; 634 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 635 636 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 637 638 atomic64_inc(&reset_stats->fw_reset_completions); 639 640 /* Clean up all outstanding io requests */ 641 fnic_cleanup_io(fnic); 642 643 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 644 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 645 atomic64_set(&fnic->io_cmpl_skip, 0); 646 647 spin_lock_irqsave(&fnic->fnic_lock, flags); 648 649 /* fnic should be in FC_TRANS_ETH_MODE */ 650 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 651 /* Check status of reset completion */ 652 if (!hdr_status) { 653 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 654 "reset cmpl success\n"); 655 /* Ready to send flogi out */ 656 fnic->state = FNIC_IN_ETH_MODE; 657 } else { 658 FNIC_SCSI_DBG(KERN_DEBUG, 659 fnic->lport->host, 660 "fnic fw_reset : failed %s\n", 661 fnic_fcpio_status_to_str(hdr_status)); 662 663 /* 664 * Unable to change to eth mode, cannot send out flogi 665 * Change state to fc mode, so that subsequent Flogi 666 * requests from libFC will cause more attempts to 667 * reset the firmware. Free the cached flogi 668 */ 669 fnic->state = FNIC_IN_FC_MODE; 670 atomic64_inc(&reset_stats->fw_reset_failures); 671 ret = -1; 672 } 673 } else { 674 FNIC_SCSI_DBG(KERN_DEBUG, 675 fnic->lport->host, 676 "Unexpected state %s while processing" 677 " reset cmpl\n", fnic_state_to_str(fnic->state)); 678 atomic64_inc(&reset_stats->fw_reset_failures); 679 ret = -1; 680 } 681 682 /* Thread removing device blocks till firmware reset is complete */ 683 if (fnic->remove_wait) 684 complete(fnic->remove_wait); 685 686 /* 687 * If fnic is being removed, or fw reset failed 688 * free the flogi frame. Else, send it out 689 */ 690 if (fnic->remove_wait || ret) { 691 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 692 skb_queue_purge(&fnic->tx_queue); 693 goto reset_cmpl_handler_end; 694 } 695 696 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 697 698 fnic_flush_tx(fnic); 699 700 reset_cmpl_handler_end: 701 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 702 703 return ret; 704 } 705 706 /* 707 * fnic_fcpio_flogi_reg_cmpl_handler 708 * Routine to handle flogi register completion 709 */ 710 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 711 struct fcpio_fw_req *desc) 712 { 713 u8 type; 714 u8 hdr_status; 715 struct fcpio_tag tag; 716 int ret = 0; 717 unsigned long flags; 718 719 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 720 721 /* Update fnic state based on status of flogi reg completion */ 722 spin_lock_irqsave(&fnic->fnic_lock, flags); 723 724 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 725 726 /* Check flogi registration completion status */ 727 if (!hdr_status) { 728 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 729 "flog reg succeeded\n"); 730 fnic->state = FNIC_IN_FC_MODE; 731 } else { 732 FNIC_SCSI_DBG(KERN_DEBUG, 733 fnic->lport->host, 734 "fnic flogi reg :failed %s\n", 735 fnic_fcpio_status_to_str(hdr_status)); 736 fnic->state = FNIC_IN_ETH_MODE; 737 ret = -1; 738 } 739 } else { 740 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 741 "Unexpected fnic state %s while" 742 " processing flogi reg completion\n", 743 fnic_state_to_str(fnic->state)); 744 ret = -1; 745 } 746 747 if (!ret) { 748 if (fnic->stop_rx_link_events) { 749 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 750 goto reg_cmpl_handler_end; 751 } 752 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 753 754 fnic_flush_tx(fnic); 755 queue_work(fnic_event_queue, &fnic->frame_work); 756 } else { 757 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 758 } 759 760 reg_cmpl_handler_end: 761 return ret; 762 } 763 764 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 765 u16 request_out) 766 { 767 if (wq->to_clean_index <= wq->to_use_index) { 768 /* out of range, stale request_out index */ 769 if (request_out < wq->to_clean_index || 770 request_out >= wq->to_use_index) 771 return 0; 772 } else { 773 /* out of range, stale request_out index */ 774 if (request_out < wq->to_clean_index && 775 request_out >= wq->to_use_index) 776 return 0; 777 } 778 /* request_out index is in range */ 779 return 1; 780 } 781 782 783 /* 784 * Mark that ack received and store the Ack index. If there are multiple 785 * acks received before Tx thread cleans it up, the latest value will be 786 * used which is correct behavior. This state should be in the copy Wq 787 * instead of in the fnic 788 */ 789 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 790 unsigned int cq_index, 791 struct fcpio_fw_req *desc) 792 { 793 struct vnic_wq_copy *wq; 794 u16 request_out = desc->u.ack.request_out; 795 unsigned long flags; 796 u64 *ox_id_tag = (u64 *)(void *)desc; 797 798 /* mark the ack state */ 799 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 800 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 801 802 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 803 if (is_ack_index_in_range(wq, request_out)) { 804 fnic->fw_ack_index[0] = request_out; 805 fnic->fw_ack_recd[0] = 1; 806 } else 807 atomic64_inc( 808 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 809 810 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 811 FNIC_TRACE(fnic_fcpio_ack_handler, 812 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 813 ox_id_tag[4], ox_id_tag[5]); 814 } 815 816 /* 817 * fnic_fcpio_icmnd_cmpl_handler 818 * Routine to handle icmnd completions 819 */ 820 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 821 struct fcpio_fw_req *desc) 822 { 823 u8 type; 824 u8 hdr_status; 825 struct fcpio_tag tag; 826 u32 id; 827 u64 xfer_len = 0; 828 struct fcpio_icmnd_cmpl *icmnd_cmpl; 829 struct fnic_io_req *io_req; 830 struct scsi_cmnd *sc; 831 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 832 unsigned long flags; 833 spinlock_t *io_lock; 834 u64 cmd_trace; 835 unsigned long start_time; 836 unsigned long io_duration_time; 837 838 /* Decode the cmpl description to get the io_req id */ 839 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 840 fcpio_tag_id_dec(&tag, &id); 841 icmnd_cmpl = &desc->u.icmnd_cmpl; 842 843 if (id >= fnic->fnic_max_tag_id) { 844 shost_printk(KERN_ERR, fnic->lport->host, 845 "Tag out of range tag %x hdr status = %s\n", 846 id, fnic_fcpio_status_to_str(hdr_status)); 847 return; 848 } 849 850 sc = scsi_host_find_tag(fnic->lport->host, id); 851 WARN_ON_ONCE(!sc); 852 if (!sc) { 853 atomic64_inc(&fnic_stats->io_stats.sc_null); 854 shost_printk(KERN_ERR, fnic->lport->host, 855 "icmnd_cmpl sc is null - " 856 "hdr status = %s tag = 0x%x desc = 0x%p\n", 857 fnic_fcpio_status_to_str(hdr_status), id, desc); 858 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 859 fnic->lport->host->host_no, id, 860 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 861 (u64)icmnd_cmpl->_resvd0[0]), 862 ((u64)hdr_status << 16 | 863 (u64)icmnd_cmpl->scsi_status << 8 | 864 (u64)icmnd_cmpl->flags), desc, 865 (u64)icmnd_cmpl->residual, 0); 866 return; 867 } 868 869 io_lock = fnic_io_lock_hash(fnic, sc); 870 spin_lock_irqsave(io_lock, flags); 871 io_req = (struct fnic_io_req *)CMD_SP(sc); 872 WARN_ON_ONCE(!io_req); 873 if (!io_req) { 874 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 875 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; 876 spin_unlock_irqrestore(io_lock, flags); 877 shost_printk(KERN_ERR, fnic->lport->host, 878 "icmnd_cmpl io_req is null - " 879 "hdr status = %s tag = 0x%x sc 0x%p\n", 880 fnic_fcpio_status_to_str(hdr_status), id, sc); 881 return; 882 } 883 start_time = io_req->start_time; 884 885 /* firmware completed the io */ 886 io_req->io_completed = 1; 887 888 /* 889 * if SCSI-ML has already issued abort on this command, 890 * set completion of the IO. The abts path will clean it up 891 */ 892 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 893 894 /* 895 * set the FNIC_IO_DONE so that this doesn't get 896 * flagged as 'out of order' if it was not aborted 897 */ 898 CMD_FLAGS(sc) |= FNIC_IO_DONE; 899 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 900 spin_unlock_irqrestore(io_lock, flags); 901 if(FCPIO_ABORTED == hdr_status) 902 CMD_FLAGS(sc) |= FNIC_IO_ABORTED; 903 904 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 905 "icmnd_cmpl abts pending " 906 "hdr status = %s tag = 0x%x sc = 0x%p " 907 "scsi_status = %x residual = %d\n", 908 fnic_fcpio_status_to_str(hdr_status), 909 id, sc, 910 icmnd_cmpl->scsi_status, 911 icmnd_cmpl->residual); 912 return; 913 } 914 915 /* Mark the IO as complete */ 916 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 917 918 icmnd_cmpl = &desc->u.icmnd_cmpl; 919 920 switch (hdr_status) { 921 case FCPIO_SUCCESS: 922 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 923 xfer_len = scsi_bufflen(sc); 924 925 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) { 926 xfer_len -= icmnd_cmpl->residual; 927 scsi_set_resid(sc, icmnd_cmpl->residual); 928 } 929 930 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) 931 atomic64_inc(&fnic_stats->misc_stats.check_condition); 932 933 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 934 atomic64_inc(&fnic_stats->misc_stats.queue_fulls); 935 break; 936 937 case FCPIO_TIMEOUT: /* request was timed out */ 938 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); 939 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 940 break; 941 942 case FCPIO_ABORTED: /* request was aborted */ 943 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); 944 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 945 break; 946 947 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 948 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); 949 scsi_set_resid(sc, icmnd_cmpl->residual); 950 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 951 break; 952 953 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 954 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); 955 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 956 break; 957 958 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 959 atomic64_inc(&fnic_stats->io_stats.io_not_found); 960 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 961 break; 962 963 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 964 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); 965 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 966 break; 967 968 case FCPIO_FW_ERR: /* request was terminated due fw error */ 969 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); 970 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 971 break; 972 973 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 974 atomic64_inc(&fnic_stats->misc_stats.mss_invalid); 975 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 976 break; 977 978 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 979 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 980 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 981 default: 982 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 983 break; 984 } 985 986 /* Break link with the SCSI command */ 987 CMD_SP(sc) = NULL; 988 CMD_FLAGS(sc) |= FNIC_IO_DONE; 989 990 spin_unlock_irqrestore(io_lock, flags); 991 992 if (hdr_status != FCPIO_SUCCESS) { 993 atomic64_inc(&fnic_stats->io_stats.io_failures); 994 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 995 fnic_fcpio_status_to_str(hdr_status)); 996 } 997 998 fnic_release_ioreq_buf(fnic, io_req, sc); 999 1000 mempool_free(io_req, fnic->io_req_pool); 1001 1002 cmd_trace = ((u64)hdr_status << 56) | 1003 (u64)icmnd_cmpl->scsi_status << 48 | 1004 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 1005 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1006 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 1007 1008 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 1009 sc->device->host->host_no, id, sc, 1010 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1011 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1012 jiffies_to_msecs(jiffies - start_time)), 1013 desc, cmd_trace, 1014 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1015 1016 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1017 fnic->lport->host_stats.fcp_input_requests++; 1018 fnic->fcp_input_bytes += xfer_len; 1019 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1020 fnic->lport->host_stats.fcp_output_requests++; 1021 fnic->fcp_output_bytes += xfer_len; 1022 } else 1023 fnic->lport->host_stats.fcp_control_requests++; 1024 1025 atomic64_dec(&fnic_stats->io_stats.active_ios); 1026 if (atomic64_read(&fnic->io_cmpl_skip)) 1027 atomic64_dec(&fnic->io_cmpl_skip); 1028 else 1029 atomic64_inc(&fnic_stats->io_stats.io_completions); 1030 1031 1032 io_duration_time = jiffies_to_msecs(jiffies) - 1033 jiffies_to_msecs(start_time); 1034 1035 if(io_duration_time <= 10) 1036 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1037 else if(io_duration_time <= 100) 1038 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1039 else if(io_duration_time <= 500) 1040 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1041 else if(io_duration_time <= 5000) 1042 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1043 else if(io_duration_time <= 10000) 1044 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1045 else if(io_duration_time <= 30000) 1046 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1047 else { 1048 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1049 1050 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1051 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1052 } 1053 1054 /* Call SCSI completion function to complete the IO */ 1055 if (sc->scsi_done) 1056 sc->scsi_done(sc); 1057 } 1058 1059 /* fnic_fcpio_itmf_cmpl_handler 1060 * Routine to handle itmf completions 1061 */ 1062 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1063 struct fcpio_fw_req *desc) 1064 { 1065 u8 type; 1066 u8 hdr_status; 1067 struct fcpio_tag tag; 1068 u32 id; 1069 struct scsi_cmnd *sc; 1070 struct fnic_io_req *io_req; 1071 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1072 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1073 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1074 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1075 unsigned long flags; 1076 spinlock_t *io_lock; 1077 unsigned long start_time; 1078 1079 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1080 fcpio_tag_id_dec(&tag, &id); 1081 1082 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1083 shost_printk(KERN_ERR, fnic->lport->host, 1084 "Tag out of range tag %x hdr status = %s\n", 1085 id, fnic_fcpio_status_to_str(hdr_status)); 1086 return; 1087 } 1088 1089 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1090 WARN_ON_ONCE(!sc); 1091 if (!sc) { 1092 atomic64_inc(&fnic_stats->io_stats.sc_null); 1093 shost_printk(KERN_ERR, fnic->lport->host, 1094 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1095 fnic_fcpio_status_to_str(hdr_status), id); 1096 return; 1097 } 1098 io_lock = fnic_io_lock_hash(fnic, sc); 1099 spin_lock_irqsave(io_lock, flags); 1100 io_req = (struct fnic_io_req *)CMD_SP(sc); 1101 WARN_ON_ONCE(!io_req); 1102 if (!io_req) { 1103 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1104 spin_unlock_irqrestore(io_lock, flags); 1105 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1106 shost_printk(KERN_ERR, fnic->lport->host, 1107 "itmf_cmpl io_req is null - " 1108 "hdr status = %s tag = 0x%x sc 0x%p\n", 1109 fnic_fcpio_status_to_str(hdr_status), id, sc); 1110 return; 1111 } 1112 start_time = io_req->start_time; 1113 1114 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1115 /* Abort and terminate completion of device reset req */ 1116 /* REVISIT : Add asserts about various flags */ 1117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1118 "dev reset abts cmpl recd. id %x status %s\n", 1119 id, fnic_fcpio_status_to_str(hdr_status)); 1120 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1121 CMD_ABTS_STATUS(sc) = hdr_status; 1122 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1123 if (io_req->abts_done) 1124 complete(io_req->abts_done); 1125 spin_unlock_irqrestore(io_lock, flags); 1126 } else if (id & FNIC_TAG_ABORT) { 1127 /* Completion of abort cmd */ 1128 switch (hdr_status) { 1129 case FCPIO_SUCCESS: 1130 break; 1131 case FCPIO_TIMEOUT: 1132 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1133 atomic64_inc(&abts_stats->abort_fw_timeouts); 1134 else 1135 atomic64_inc( 1136 &term_stats->terminate_fw_timeouts); 1137 break; 1138 case FCPIO_ITMF_REJECTED: 1139 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1140 "abort reject recd. id %d\n", 1141 (int)(id & FNIC_TAG_MASK)); 1142 break; 1143 case FCPIO_IO_NOT_FOUND: 1144 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1145 atomic64_inc(&abts_stats->abort_io_not_found); 1146 else 1147 atomic64_inc( 1148 &term_stats->terminate_io_not_found); 1149 break; 1150 default: 1151 if (CMD_FLAGS(sc) & FNIC_IO_ABTS_ISSUED) 1152 atomic64_inc(&abts_stats->abort_failures); 1153 else 1154 atomic64_inc( 1155 &term_stats->terminate_failures); 1156 break; 1157 } 1158 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 1159 /* This is a late completion. Ignore it */ 1160 spin_unlock_irqrestore(io_lock, flags); 1161 return; 1162 } 1163 1164 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1165 CMD_ABTS_STATUS(sc) = hdr_status; 1166 1167 /* If the status is IO not found consider it as success */ 1168 if (hdr_status == FCPIO_IO_NOT_FOUND) 1169 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; 1170 1171 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1172 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1173 1174 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1175 "abts cmpl recd. id %d status %s\n", 1176 (int)(id & FNIC_TAG_MASK), 1177 fnic_fcpio_status_to_str(hdr_status)); 1178 1179 /* 1180 * If scsi_eh thread is blocked waiting for abts to complete, 1181 * signal completion to it. IO will be cleaned in the thread 1182 * else clean it in this context 1183 */ 1184 if (io_req->abts_done) { 1185 complete(io_req->abts_done); 1186 spin_unlock_irqrestore(io_lock, flags); 1187 } else { 1188 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1189 "abts cmpl, completing IO\n"); 1190 CMD_SP(sc) = NULL; 1191 sc->result = (DID_ERROR << 16); 1192 1193 spin_unlock_irqrestore(io_lock, flags); 1194 1195 fnic_release_ioreq_buf(fnic, io_req, sc); 1196 mempool_free(io_req, fnic->io_req_pool); 1197 if (sc->scsi_done) { 1198 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1199 sc->device->host->host_no, id, 1200 sc, 1201 jiffies_to_msecs(jiffies - start_time), 1202 desc, 1203 (((u64)hdr_status << 40) | 1204 (u64)sc->cmnd[0] << 32 | 1205 (u64)sc->cmnd[2] << 24 | 1206 (u64)sc->cmnd[3] << 16 | 1207 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1208 (((u64)CMD_FLAGS(sc) << 32) | 1209 CMD_STATE(sc))); 1210 sc->scsi_done(sc); 1211 atomic64_dec(&fnic_stats->io_stats.active_ios); 1212 if (atomic64_read(&fnic->io_cmpl_skip)) 1213 atomic64_dec(&fnic->io_cmpl_skip); 1214 else 1215 atomic64_inc(&fnic_stats->io_stats.io_completions); 1216 } 1217 } 1218 1219 } else if (id & FNIC_TAG_DEV_RST) { 1220 /* Completion of device reset */ 1221 CMD_LR_STATUS(sc) = hdr_status; 1222 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1223 spin_unlock_irqrestore(io_lock, flags); 1224 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1225 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1226 sc->device->host->host_no, id, sc, 1227 jiffies_to_msecs(jiffies - start_time), 1228 desc, 0, 1229 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1230 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1231 "Terminate pending " 1232 "dev reset cmpl recd. id %d status %s\n", 1233 (int)(id & FNIC_TAG_MASK), 1234 fnic_fcpio_status_to_str(hdr_status)); 1235 return; 1236 } 1237 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1238 /* Need to wait for terminate completion */ 1239 spin_unlock_irqrestore(io_lock, flags); 1240 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1241 sc->device->host->host_no, id, sc, 1242 jiffies_to_msecs(jiffies - start_time), 1243 desc, 0, 1244 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1245 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1246 "dev reset cmpl recd after time out. " 1247 "id %d status %s\n", 1248 (int)(id & FNIC_TAG_MASK), 1249 fnic_fcpio_status_to_str(hdr_status)); 1250 return; 1251 } 1252 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1253 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1254 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1255 "dev reset cmpl recd. id %d status %s\n", 1256 (int)(id & FNIC_TAG_MASK), 1257 fnic_fcpio_status_to_str(hdr_status)); 1258 if (io_req->dr_done) 1259 complete(io_req->dr_done); 1260 spin_unlock_irqrestore(io_lock, flags); 1261 1262 } else { 1263 shost_printk(KERN_ERR, fnic->lport->host, 1264 "Unexpected itmf io state %s tag %x\n", 1265 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1266 spin_unlock_irqrestore(io_lock, flags); 1267 } 1268 1269 } 1270 1271 /* 1272 * fnic_fcpio_cmpl_handler 1273 * Routine to service the cq for wq_copy 1274 */ 1275 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1276 unsigned int cq_index, 1277 struct fcpio_fw_req *desc) 1278 { 1279 struct fnic *fnic = vnic_dev_priv(vdev); 1280 1281 switch (desc->hdr.type) { 1282 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1283 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1284 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1285 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1286 case FCPIO_RESET_CMPL: /* fw completed reset */ 1287 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1288 break; 1289 default: 1290 break; 1291 } 1292 1293 switch (desc->hdr.type) { 1294 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1295 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1296 break; 1297 1298 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1299 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1300 break; 1301 1302 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1303 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1304 break; 1305 1306 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1307 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1308 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1309 break; 1310 1311 case FCPIO_RESET_CMPL: /* fw completed reset */ 1312 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1313 break; 1314 1315 default: 1316 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1317 "firmware completion type %d\n", 1318 desc->hdr.type); 1319 break; 1320 } 1321 1322 return 0; 1323 } 1324 1325 /* 1326 * fnic_wq_copy_cmpl_handler 1327 * Routine to process wq copy 1328 */ 1329 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1330 { 1331 unsigned int wq_work_done = 0; 1332 unsigned int i, cq_index; 1333 unsigned int cur_work_done; 1334 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1335 u64 start_jiffies = 0; 1336 u64 end_jiffies = 0; 1337 u64 delta_jiffies = 0; 1338 u64 delta_ms = 0; 1339 1340 for (i = 0; i < fnic->wq_copy_count; i++) { 1341 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1342 1343 start_jiffies = jiffies; 1344 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1345 fnic_fcpio_cmpl_handler, 1346 copy_work_to_do); 1347 end_jiffies = jiffies; 1348 1349 wq_work_done += cur_work_done; 1350 delta_jiffies = end_jiffies - start_jiffies; 1351 if (delta_jiffies > 1352 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { 1353 atomic64_set(&misc_stats->max_isr_jiffies, 1354 delta_jiffies); 1355 delta_ms = jiffies_to_msecs(delta_jiffies); 1356 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); 1357 atomic64_set(&misc_stats->corr_work_done, 1358 cur_work_done); 1359 } 1360 } 1361 return wq_work_done; 1362 } 1363 1364 static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data, 1365 bool reserved) 1366 { 1367 struct fnic *fnic = data; 1368 struct fnic_io_req *io_req; 1369 unsigned long flags = 0; 1370 spinlock_t *io_lock; 1371 unsigned long start_time = 0; 1372 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1373 1374 io_lock = fnic_io_lock_tag(fnic, sc->request->tag); 1375 spin_lock_irqsave(io_lock, flags); 1376 1377 io_req = (struct fnic_io_req *)CMD_SP(sc); 1378 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1379 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1380 /* 1381 * We will be here only when FW completes reset 1382 * without sending completions for outstanding ios. 1383 */ 1384 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1385 if (io_req && io_req->dr_done) 1386 complete(io_req->dr_done); 1387 else if (io_req && io_req->abts_done) 1388 complete(io_req->abts_done); 1389 spin_unlock_irqrestore(io_lock, flags); 1390 return true; 1391 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1392 spin_unlock_irqrestore(io_lock, flags); 1393 return true; 1394 } 1395 if (!io_req) { 1396 spin_unlock_irqrestore(io_lock, flags); 1397 goto cleanup_scsi_cmd; 1398 } 1399 1400 CMD_SP(sc) = NULL; 1401 1402 spin_unlock_irqrestore(io_lock, flags); 1403 1404 /* 1405 * If there is a scsi_cmnd associated with this io_req, then 1406 * free the corresponding state 1407 */ 1408 start_time = io_req->start_time; 1409 fnic_release_ioreq_buf(fnic, io_req, sc); 1410 mempool_free(io_req, fnic->io_req_pool); 1411 1412 cleanup_scsi_cmd: 1413 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1414 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1415 "fnic_cleanup_io: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", 1416 sc->request->tag, sc, (jiffies - start_time)); 1417 1418 if (atomic64_read(&fnic->io_cmpl_skip)) 1419 atomic64_dec(&fnic->io_cmpl_skip); 1420 else 1421 atomic64_inc(&fnic_stats->io_stats.io_completions); 1422 1423 /* Complete the command to SCSI */ 1424 if (sc->scsi_done) { 1425 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) 1426 shost_printk(KERN_ERR, fnic->lport->host, 1427 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", 1428 sc->request->tag, sc); 1429 1430 FNIC_TRACE(fnic_cleanup_io, 1431 sc->device->host->host_no, sc->request->tag, sc, 1432 jiffies_to_msecs(jiffies - start_time), 1433 0, ((u64)sc->cmnd[0] << 32 | 1434 (u64)sc->cmnd[2] << 24 | 1435 (u64)sc->cmnd[3] << 16 | 1436 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1437 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1438 1439 sc->scsi_done(sc); 1440 } 1441 return true; 1442 } 1443 1444 static void fnic_cleanup_io(struct fnic *fnic) 1445 { 1446 scsi_host_busy_iter(fnic->lport->host, 1447 fnic_cleanup_io_iter, fnic); 1448 } 1449 1450 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1451 struct fcpio_host_req *desc) 1452 { 1453 u32 id; 1454 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1455 struct fnic_io_req *io_req; 1456 struct scsi_cmnd *sc; 1457 unsigned long flags; 1458 spinlock_t *io_lock; 1459 unsigned long start_time = 0; 1460 1461 /* get the tag reference */ 1462 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1463 id &= FNIC_TAG_MASK; 1464 1465 if (id >= fnic->fnic_max_tag_id) 1466 return; 1467 1468 sc = scsi_host_find_tag(fnic->lport->host, id); 1469 if (!sc) 1470 return; 1471 1472 io_lock = fnic_io_lock_hash(fnic, sc); 1473 spin_lock_irqsave(io_lock, flags); 1474 1475 /* Get the IO context which this desc refers to */ 1476 io_req = (struct fnic_io_req *)CMD_SP(sc); 1477 1478 /* fnic interrupts are turned off by now */ 1479 1480 if (!io_req) { 1481 spin_unlock_irqrestore(io_lock, flags); 1482 goto wq_copy_cleanup_scsi_cmd; 1483 } 1484 1485 CMD_SP(sc) = NULL; 1486 1487 spin_unlock_irqrestore(io_lock, flags); 1488 1489 start_time = io_req->start_time; 1490 fnic_release_ioreq_buf(fnic, io_req, sc); 1491 mempool_free(io_req, fnic->io_req_pool); 1492 1493 wq_copy_cleanup_scsi_cmd: 1494 sc->result = DID_NO_CONNECT << 16; 1495 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1496 " DID_NO_CONNECT\n"); 1497 1498 if (sc->scsi_done) { 1499 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1500 sc->device->host->host_no, id, sc, 1501 jiffies_to_msecs(jiffies - start_time), 1502 0, ((u64)sc->cmnd[0] << 32 | 1503 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1504 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1505 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1506 1507 sc->scsi_done(sc); 1508 } 1509 } 1510 1511 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1512 u32 task_req, u8 *fc_lun, 1513 struct fnic_io_req *io_req) 1514 { 1515 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1516 struct Scsi_Host *host = fnic->lport->host; 1517 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1518 unsigned long flags; 1519 1520 spin_lock_irqsave(host->host_lock, flags); 1521 if (unlikely(fnic_chk_state_flags_locked(fnic, 1522 FNIC_FLAGS_IO_BLOCKED))) { 1523 spin_unlock_irqrestore(host->host_lock, flags); 1524 return 1; 1525 } else 1526 atomic_inc(&fnic->in_flight); 1527 spin_unlock_irqrestore(host->host_lock, flags); 1528 1529 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1530 1531 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1532 free_wq_copy_descs(fnic, wq); 1533 1534 if (!vnic_wq_copy_desc_avail(wq)) { 1535 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1536 atomic_dec(&fnic->in_flight); 1537 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1538 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1539 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1540 return 1; 1541 } 1542 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1543 0, task_req, tag, fc_lun, io_req->port_id, 1544 fnic->config.ra_tov, fnic->config.ed_tov); 1545 1546 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1547 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1548 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1549 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1550 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1551 1552 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1553 atomic_dec(&fnic->in_flight); 1554 1555 return 0; 1556 } 1557 1558 struct fnic_rport_abort_io_iter_data { 1559 struct fnic *fnic; 1560 u32 port_id; 1561 int term_cnt; 1562 }; 1563 1564 static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data, 1565 bool reserved) 1566 { 1567 struct fnic_rport_abort_io_iter_data *iter_data = data; 1568 struct fnic *fnic = iter_data->fnic; 1569 int abt_tag = sc->request->tag; 1570 struct fnic_io_req *io_req; 1571 spinlock_t *io_lock; 1572 unsigned long flags; 1573 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1574 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1575 struct scsi_lun fc_lun; 1576 enum fnic_ioreq_state old_ioreq_state; 1577 1578 io_lock = fnic_io_lock_tag(fnic, abt_tag); 1579 spin_lock_irqsave(io_lock, flags); 1580 1581 io_req = (struct fnic_io_req *)CMD_SP(sc); 1582 1583 if (!io_req || io_req->port_id != iter_data->port_id) { 1584 spin_unlock_irqrestore(io_lock, flags); 1585 return true; 1586 } 1587 1588 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1589 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1590 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1591 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1592 sc); 1593 spin_unlock_irqrestore(io_lock, flags); 1594 return true; 1595 } 1596 1597 /* 1598 * Found IO that is still pending with firmware and 1599 * belongs to rport that went away 1600 */ 1601 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1602 spin_unlock_irqrestore(io_lock, flags); 1603 return true; 1604 } 1605 if (io_req->abts_done) { 1606 shost_printk(KERN_ERR, fnic->lport->host, 1607 "fnic_rport_exch_reset: io_req->abts_done is set " 1608 "state is %s\n", 1609 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1610 } 1611 1612 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1613 shost_printk(KERN_ERR, fnic->lport->host, 1614 "rport_exch_reset " 1615 "IO not yet issued %p tag 0x%x flags " 1616 "%x state %d\n", 1617 sc, abt_tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1618 } 1619 old_ioreq_state = CMD_STATE(sc); 1620 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1621 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1622 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1623 atomic64_inc(&reset_stats->device_reset_terminates); 1624 abt_tag |= FNIC_TAG_DEV_RST; 1625 } 1626 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1627 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); 1628 BUG_ON(io_req->abts_done); 1629 1630 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1631 "fnic_rport_reset_exch: Issuing abts\n"); 1632 1633 spin_unlock_irqrestore(io_lock, flags); 1634 1635 /* Now queue the abort command to firmware */ 1636 int_to_scsilun(sc->device->lun, &fc_lun); 1637 1638 if (fnic_queue_abort_io_req(fnic, abt_tag, 1639 FCPIO_ITMF_ABT_TASK_TERM, 1640 fc_lun.scsi_lun, io_req)) { 1641 /* 1642 * Revert the cmd state back to old state, if 1643 * it hasn't changed in between. This cmd will get 1644 * aborted later by scsi_eh, or cleaned up during 1645 * lun reset 1646 */ 1647 spin_lock_irqsave(io_lock, flags); 1648 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1649 CMD_STATE(sc) = old_ioreq_state; 1650 spin_unlock_irqrestore(io_lock, flags); 1651 } else { 1652 spin_lock_irqsave(io_lock, flags); 1653 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1654 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1655 else 1656 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1657 spin_unlock_irqrestore(io_lock, flags); 1658 atomic64_inc(&term_stats->terminates); 1659 iter_data->term_cnt++; 1660 } 1661 return true; 1662 } 1663 1664 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1665 { 1666 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1667 struct fnic_rport_abort_io_iter_data iter_data = { 1668 .fnic = fnic, 1669 .port_id = port_id, 1670 .term_cnt = 0, 1671 }; 1672 1673 FNIC_SCSI_DBG(KERN_DEBUG, 1674 fnic->lport->host, 1675 "fnic_rport_exch_reset called portid 0x%06x\n", 1676 port_id); 1677 1678 if (fnic->in_remove) 1679 return; 1680 1681 scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter, 1682 &iter_data); 1683 if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates)) 1684 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt); 1685 1686 } 1687 1688 void fnic_terminate_rport_io(struct fc_rport *rport) 1689 { 1690 struct fc_rport_libfc_priv *rdata; 1691 struct fc_lport *lport; 1692 struct fnic *fnic; 1693 1694 if (!rport) { 1695 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1696 return; 1697 } 1698 rdata = rport->dd_data; 1699 1700 if (!rdata) { 1701 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1702 return; 1703 } 1704 lport = rdata->local_port; 1705 1706 if (!lport) { 1707 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1708 return; 1709 } 1710 fnic = lport_priv(lport); 1711 FNIC_SCSI_DBG(KERN_DEBUG, 1712 fnic->lport->host, "fnic_terminate_rport_io called" 1713 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1714 rport->port_name, rport->node_name, rport, 1715 rport->port_id); 1716 1717 if (fnic->in_remove) 1718 return; 1719 1720 fnic_rport_exch_reset(fnic, rport->port_id); 1721 } 1722 1723 /* 1724 * This function is exported to SCSI for sending abort cmnds. 1725 * A SCSI IO is represented by a io_req in the driver. 1726 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1727 */ 1728 int fnic_abort_cmd(struct scsi_cmnd *sc) 1729 { 1730 struct fc_lport *lp; 1731 struct fnic *fnic; 1732 struct fnic_io_req *io_req = NULL; 1733 struct fc_rport *rport; 1734 spinlock_t *io_lock; 1735 unsigned long flags; 1736 unsigned long start_time = 0; 1737 int ret = SUCCESS; 1738 u32 task_req = 0; 1739 struct scsi_lun fc_lun; 1740 struct fnic_stats *fnic_stats; 1741 struct abort_stats *abts_stats; 1742 struct terminate_stats *term_stats; 1743 enum fnic_ioreq_state old_ioreq_state; 1744 int tag; 1745 unsigned long abt_issued_time; 1746 DECLARE_COMPLETION_ONSTACK(tm_done); 1747 1748 /* Wait for rport to unblock */ 1749 fc_block_scsi_eh(sc); 1750 1751 /* Get local-port, check ready and link up */ 1752 lp = shost_priv(sc->device->host); 1753 1754 fnic = lport_priv(lp); 1755 fnic_stats = &fnic->fnic_stats; 1756 abts_stats = &fnic->fnic_stats.abts_stats; 1757 term_stats = &fnic->fnic_stats.term_stats; 1758 1759 rport = starget_to_rport(scsi_target(sc->device)); 1760 tag = sc->request->tag; 1761 FNIC_SCSI_DBG(KERN_DEBUG, 1762 fnic->lport->host, 1763 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1764 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1765 1766 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1767 1768 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1769 ret = FAILED; 1770 goto fnic_abort_cmd_end; 1771 } 1772 1773 /* 1774 * Avoid a race between SCSI issuing the abort and the device 1775 * completing the command. 1776 * 1777 * If the command is already completed by the fw cmpl code, 1778 * we just return SUCCESS from here. This means that the abort 1779 * succeeded. In the SCSI ML, since the timeout for command has 1780 * happened, the completion wont actually complete the command 1781 * and it will be considered as an aborted command 1782 * 1783 * The CMD_SP will not be cleared except while holding io_req_lock. 1784 */ 1785 io_lock = fnic_io_lock_hash(fnic, sc); 1786 spin_lock_irqsave(io_lock, flags); 1787 io_req = (struct fnic_io_req *)CMD_SP(sc); 1788 if (!io_req) { 1789 spin_unlock_irqrestore(io_lock, flags); 1790 goto fnic_abort_cmd_end; 1791 } 1792 1793 io_req->abts_done = &tm_done; 1794 1795 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1796 spin_unlock_irqrestore(io_lock, flags); 1797 goto wait_pending; 1798 } 1799 1800 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1801 if (abt_issued_time <= 6000) 1802 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1803 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1804 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1805 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1806 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1807 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1808 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1809 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1810 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1811 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1812 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1813 else 1814 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1815 1816 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1817 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1818 /* 1819 * Command is still pending, need to abort it 1820 * If the firmware completes the command after this point, 1821 * the completion wont be done till mid-layer, since abort 1822 * has already started. 1823 */ 1824 old_ioreq_state = CMD_STATE(sc); 1825 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1826 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1827 1828 spin_unlock_irqrestore(io_lock, flags); 1829 1830 /* 1831 * Check readiness of the remote port. If the path to remote 1832 * port is up, then send abts to the remote port to terminate 1833 * the IO. Else, just locally terminate the IO in the firmware 1834 */ 1835 if (fc_remote_port_chkready(rport) == 0) 1836 task_req = FCPIO_ITMF_ABT_TASK; 1837 else { 1838 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1839 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1840 } 1841 1842 /* Now queue the abort command to firmware */ 1843 int_to_scsilun(sc->device->lun, &fc_lun); 1844 1845 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1846 fc_lun.scsi_lun, io_req)) { 1847 spin_lock_irqsave(io_lock, flags); 1848 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1849 CMD_STATE(sc) = old_ioreq_state; 1850 io_req = (struct fnic_io_req *)CMD_SP(sc); 1851 if (io_req) 1852 io_req->abts_done = NULL; 1853 spin_unlock_irqrestore(io_lock, flags); 1854 ret = FAILED; 1855 goto fnic_abort_cmd_end; 1856 } 1857 if (task_req == FCPIO_ITMF_ABT_TASK) { 1858 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1859 atomic64_inc(&fnic_stats->abts_stats.aborts); 1860 } else { 1861 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1862 atomic64_inc(&fnic_stats->term_stats.terminates); 1863 } 1864 1865 /* 1866 * We queued an abort IO, wait for its completion. 1867 * Once the firmware completes the abort command, it will 1868 * wake up this thread. 1869 */ 1870 wait_pending: 1871 wait_for_completion_timeout(&tm_done, 1872 msecs_to_jiffies 1873 (2 * fnic->config.ra_tov + 1874 fnic->config.ed_tov)); 1875 1876 /* Check the abort status */ 1877 spin_lock_irqsave(io_lock, flags); 1878 1879 io_req = (struct fnic_io_req *)CMD_SP(sc); 1880 if (!io_req) { 1881 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1882 spin_unlock_irqrestore(io_lock, flags); 1883 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1884 ret = FAILED; 1885 goto fnic_abort_cmd_end; 1886 } 1887 io_req->abts_done = NULL; 1888 1889 /* fw did not complete abort, timed out */ 1890 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1891 spin_unlock_irqrestore(io_lock, flags); 1892 if (task_req == FCPIO_ITMF_ABT_TASK) { 1893 atomic64_inc(&abts_stats->abort_drv_timeouts); 1894 } else { 1895 atomic64_inc(&term_stats->terminate_drv_timeouts); 1896 } 1897 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 1898 ret = FAILED; 1899 goto fnic_abort_cmd_end; 1900 } 1901 1902 /* IO out of order */ 1903 1904 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1905 spin_unlock_irqrestore(io_lock, flags); 1906 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1907 "Issuing Host reset due to out of order IO\n"); 1908 1909 ret = FAILED; 1910 goto fnic_abort_cmd_end; 1911 } 1912 1913 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1914 1915 start_time = io_req->start_time; 1916 /* 1917 * firmware completed the abort, check the status, 1918 * free the io_req if successful. If abort fails, 1919 * Device reset will clean the I/O. 1920 */ 1921 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) 1922 CMD_SP(sc) = NULL; 1923 else { 1924 ret = FAILED; 1925 spin_unlock_irqrestore(io_lock, flags); 1926 goto fnic_abort_cmd_end; 1927 } 1928 1929 spin_unlock_irqrestore(io_lock, flags); 1930 1931 fnic_release_ioreq_buf(fnic, io_req, sc); 1932 mempool_free(io_req, fnic->io_req_pool); 1933 1934 if (sc->scsi_done) { 1935 /* Call SCSI completion function to complete the IO */ 1936 sc->result = (DID_ABORT << 16); 1937 sc->scsi_done(sc); 1938 atomic64_dec(&fnic_stats->io_stats.active_ios); 1939 if (atomic64_read(&fnic->io_cmpl_skip)) 1940 atomic64_dec(&fnic->io_cmpl_skip); 1941 else 1942 atomic64_inc(&fnic_stats->io_stats.io_completions); 1943 } 1944 1945 fnic_abort_cmd_end: 1946 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 1947 sc->request->tag, sc, 1948 jiffies_to_msecs(jiffies - start_time), 1949 0, ((u64)sc->cmnd[0] << 32 | 1950 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1951 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1952 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1953 1954 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1955 "Returning from abort cmd type %x %s\n", task_req, 1956 (ret == SUCCESS) ? 1957 "SUCCESS" : "FAILED"); 1958 return ret; 1959 } 1960 1961 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 1962 struct scsi_cmnd *sc, 1963 struct fnic_io_req *io_req) 1964 { 1965 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1966 struct Scsi_Host *host = fnic->lport->host; 1967 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1968 struct scsi_lun fc_lun; 1969 int ret = 0; 1970 unsigned long intr_flags; 1971 1972 spin_lock_irqsave(host->host_lock, intr_flags); 1973 if (unlikely(fnic_chk_state_flags_locked(fnic, 1974 FNIC_FLAGS_IO_BLOCKED))) { 1975 spin_unlock_irqrestore(host->host_lock, intr_flags); 1976 return FAILED; 1977 } else 1978 atomic_inc(&fnic->in_flight); 1979 spin_unlock_irqrestore(host->host_lock, intr_flags); 1980 1981 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 1982 1983 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1984 free_wq_copy_descs(fnic, wq); 1985 1986 if (!vnic_wq_copy_desc_avail(wq)) { 1987 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1988 "queue_dr_io_req failure - no descriptors\n"); 1989 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 1990 ret = -EAGAIN; 1991 goto lr_io_req_end; 1992 } 1993 1994 /* fill in the lun info */ 1995 int_to_scsilun(sc->device->lun, &fc_lun); 1996 1997 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 1998 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 1999 fc_lun.scsi_lun, io_req->port_id, 2000 fnic->config.ra_tov, fnic->config.ed_tov); 2001 2002 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 2003 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 2004 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 2005 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 2006 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 2007 2008 lr_io_req_end: 2009 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 2010 atomic_dec(&fnic->in_flight); 2011 2012 return ret; 2013 } 2014 2015 struct fnic_pending_aborts_iter_data { 2016 struct fnic *fnic; 2017 struct scsi_cmnd *lr_sc; 2018 struct scsi_device *lun_dev; 2019 int ret; 2020 }; 2021 2022 static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, 2023 void *data, bool reserved) 2024 { 2025 struct fnic_pending_aborts_iter_data *iter_data = data; 2026 struct fnic *fnic = iter_data->fnic; 2027 struct scsi_device *lun_dev = iter_data->lun_dev; 2028 int abt_tag = sc->request->tag; 2029 struct fnic_io_req *io_req; 2030 spinlock_t *io_lock; 2031 unsigned long flags; 2032 struct scsi_lun fc_lun; 2033 DECLARE_COMPLETION_ONSTACK(tm_done); 2034 enum fnic_ioreq_state old_ioreq_state; 2035 2036 if (sc == iter_data->lr_sc || sc->device != lun_dev) 2037 return true; 2038 if (reserved) 2039 return true; 2040 2041 io_lock = fnic_io_lock_tag(fnic, abt_tag); 2042 spin_lock_irqsave(io_lock, flags); 2043 io_req = (struct fnic_io_req *)CMD_SP(sc); 2044 if (!io_req) { 2045 spin_unlock_irqrestore(io_lock, flags); 2046 return true; 2047 } 2048 2049 /* 2050 * Found IO that is still pending with firmware and 2051 * belongs to the LUN that we are resetting 2052 */ 2053 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2054 "Found IO in %s on lun\n", 2055 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2056 2057 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2058 spin_unlock_irqrestore(io_lock, flags); 2059 return true; 2060 } 2061 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 2062 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 2063 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2064 "%s dev rst not pending sc 0x%p\n", __func__, 2065 sc); 2066 spin_unlock_irqrestore(io_lock, flags); 2067 return true; 2068 } 2069 2070 if (io_req->abts_done) 2071 shost_printk(KERN_ERR, fnic->lport->host, 2072 "%s: io_req->abts_done is set state is %s\n", 2073 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 2074 old_ioreq_state = CMD_STATE(sc); 2075 /* 2076 * Any pending IO issued prior to reset is expected to be 2077 * in abts pending state, if not we need to set 2078 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2079 * When IO is completed, the IO will be handed over and 2080 * handled in this function. 2081 */ 2082 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2083 2084 BUG_ON(io_req->abts_done); 2085 2086 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 2087 abt_tag |= FNIC_TAG_DEV_RST; 2088 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2089 "%s: dev rst sc 0x%p\n", __func__, sc); 2090 } 2091 2092 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 2093 io_req->abts_done = &tm_done; 2094 spin_unlock_irqrestore(io_lock, flags); 2095 2096 /* Now queue the abort command to firmware */ 2097 int_to_scsilun(sc->device->lun, &fc_lun); 2098 2099 if (fnic_queue_abort_io_req(fnic, abt_tag, 2100 FCPIO_ITMF_ABT_TASK_TERM, 2101 fc_lun.scsi_lun, io_req)) { 2102 spin_lock_irqsave(io_lock, flags); 2103 io_req = (struct fnic_io_req *)CMD_SP(sc); 2104 if (io_req) 2105 io_req->abts_done = NULL; 2106 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2107 CMD_STATE(sc) = old_ioreq_state; 2108 spin_unlock_irqrestore(io_lock, flags); 2109 iter_data->ret = FAILED; 2110 return false; 2111 } else { 2112 spin_lock_irqsave(io_lock, flags); 2113 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 2114 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2115 spin_unlock_irqrestore(io_lock, flags); 2116 } 2117 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 2118 2119 wait_for_completion_timeout(&tm_done, msecs_to_jiffies 2120 (fnic->config.ed_tov)); 2121 2122 /* Recheck cmd state to check if it is now aborted */ 2123 spin_lock_irqsave(io_lock, flags); 2124 io_req = (struct fnic_io_req *)CMD_SP(sc); 2125 if (!io_req) { 2126 spin_unlock_irqrestore(io_lock, flags); 2127 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 2128 return true; 2129 } 2130 2131 io_req->abts_done = NULL; 2132 2133 /* if abort is still pending with fw, fail */ 2134 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 2135 spin_unlock_irqrestore(io_lock, flags); 2136 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 2137 iter_data->ret = FAILED; 2138 return false; 2139 } 2140 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2141 2142 /* original sc used for lr is handled by dev reset code */ 2143 if (sc != iter_data->lr_sc) 2144 CMD_SP(sc) = NULL; 2145 spin_unlock_irqrestore(io_lock, flags); 2146 2147 /* original sc used for lr is handled by dev reset code */ 2148 if (sc != iter_data->lr_sc) { 2149 fnic_release_ioreq_buf(fnic, io_req, sc); 2150 mempool_free(io_req, fnic->io_req_pool); 2151 } 2152 2153 /* 2154 * Any IO is returned during reset, it needs to call scsi_done 2155 * to return the scsi_cmnd to upper layer. 2156 */ 2157 if (sc->scsi_done) { 2158 /* Set result to let upper SCSI layer retry */ 2159 sc->result = DID_RESET << 16; 2160 sc->scsi_done(sc); 2161 } 2162 return true; 2163 } 2164 2165 /* 2166 * Clean up any pending aborts on the lun 2167 * For each outstanding IO on this lun, whose abort is not completed by fw, 2168 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2169 * successfully aborted, 1 otherwise 2170 */ 2171 static int fnic_clean_pending_aborts(struct fnic *fnic, 2172 struct scsi_cmnd *lr_sc, 2173 bool new_sc) 2174 2175 { 2176 int ret = SUCCESS; 2177 struct fnic_pending_aborts_iter_data iter_data = { 2178 .fnic = fnic, 2179 .lun_dev = lr_sc->device, 2180 .ret = SUCCESS, 2181 }; 2182 2183 if (new_sc) 2184 iter_data.lr_sc = lr_sc; 2185 2186 scsi_host_busy_iter(fnic->lport->host, 2187 fnic_pending_aborts_iter, &iter_data); 2188 if (iter_data.ret == FAILED) { 2189 ret = iter_data.ret; 2190 goto clean_pending_aborts_end; 2191 } 2192 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2193 2194 /* walk again to check, if IOs are still pending in fw */ 2195 if (fnic_is_abts_pending(fnic, lr_sc)) 2196 ret = FAILED; 2197 2198 clean_pending_aborts_end: 2199 return ret; 2200 } 2201 2202 /* 2203 * fnic_scsi_host_start_tag 2204 * Allocates tagid from host's tag list 2205 **/ 2206 static inline int 2207 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2208 { 2209 struct request_queue *q = sc->request->q; 2210 struct request *dummy; 2211 2212 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); 2213 if (IS_ERR(dummy)) 2214 return SCSI_NO_TAG; 2215 2216 sc->tag = sc->request->tag = dummy->tag; 2217 sc->host_scribble = (unsigned char *)dummy; 2218 2219 return dummy->tag; 2220 } 2221 2222 /* 2223 * fnic_scsi_host_end_tag 2224 * frees tag allocated by fnic_scsi_host_start_tag. 2225 **/ 2226 static inline void 2227 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2228 { 2229 struct request *dummy = (struct request *)sc->host_scribble; 2230 2231 blk_mq_free_request(dummy); 2232 } 2233 2234 /* 2235 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2236 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2237 * on the LUN. 2238 */ 2239 int fnic_device_reset(struct scsi_cmnd *sc) 2240 { 2241 struct fc_lport *lp; 2242 struct fnic *fnic; 2243 struct fnic_io_req *io_req = NULL; 2244 struct fc_rport *rport; 2245 int status; 2246 int ret = FAILED; 2247 spinlock_t *io_lock; 2248 unsigned long flags; 2249 unsigned long start_time = 0; 2250 struct scsi_lun fc_lun; 2251 struct fnic_stats *fnic_stats; 2252 struct reset_stats *reset_stats; 2253 int tag = 0; 2254 DECLARE_COMPLETION_ONSTACK(tm_done); 2255 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2256 bool new_sc = 0; 2257 2258 /* Wait for rport to unblock */ 2259 fc_block_scsi_eh(sc); 2260 2261 /* Get local-port, check ready and link up */ 2262 lp = shost_priv(sc->device->host); 2263 2264 fnic = lport_priv(lp); 2265 fnic_stats = &fnic->fnic_stats; 2266 reset_stats = &fnic->fnic_stats.reset_stats; 2267 2268 atomic64_inc(&reset_stats->device_resets); 2269 2270 rport = starget_to_rport(scsi_target(sc->device)); 2271 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2272 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2273 rport->port_id, sc->device->lun, sc); 2274 2275 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2276 goto fnic_device_reset_end; 2277 2278 /* Check if remote port up */ 2279 if (fc_remote_port_chkready(rport)) { 2280 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2281 goto fnic_device_reset_end; 2282 } 2283 2284 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2285 /* Allocate tag if not present */ 2286 2287 tag = sc->request->tag; 2288 if (unlikely(tag < 0)) { 2289 /* 2290 * Really should fix the midlayer to pass in a proper 2291 * request for ioctls... 2292 */ 2293 tag = fnic_scsi_host_start_tag(fnic, sc); 2294 if (unlikely(tag == SCSI_NO_TAG)) 2295 goto fnic_device_reset_end; 2296 tag_gen_flag = 1; 2297 new_sc = 1; 2298 } 2299 io_lock = fnic_io_lock_hash(fnic, sc); 2300 spin_lock_irqsave(io_lock, flags); 2301 io_req = (struct fnic_io_req *)CMD_SP(sc); 2302 2303 /* 2304 * If there is a io_req attached to this command, then use it, 2305 * else allocate a new one. 2306 */ 2307 if (!io_req) { 2308 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2309 if (!io_req) { 2310 spin_unlock_irqrestore(io_lock, flags); 2311 goto fnic_device_reset_end; 2312 } 2313 memset(io_req, 0, sizeof(*io_req)); 2314 io_req->port_id = rport->port_id; 2315 CMD_SP(sc) = (char *)io_req; 2316 } 2317 io_req->dr_done = &tm_done; 2318 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2319 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2320 spin_unlock_irqrestore(io_lock, flags); 2321 2322 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2323 2324 /* 2325 * issue the device reset, if enqueue failed, clean up the ioreq 2326 * and break assoc with scsi cmd 2327 */ 2328 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2329 spin_lock_irqsave(io_lock, flags); 2330 io_req = (struct fnic_io_req *)CMD_SP(sc); 2331 if (io_req) 2332 io_req->dr_done = NULL; 2333 goto fnic_device_reset_clean; 2334 } 2335 spin_lock_irqsave(io_lock, flags); 2336 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2337 spin_unlock_irqrestore(io_lock, flags); 2338 2339 /* 2340 * Wait on the local completion for LUN reset. The io_req may be 2341 * freed while we wait since we hold no lock. 2342 */ 2343 wait_for_completion_timeout(&tm_done, 2344 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2345 2346 spin_lock_irqsave(io_lock, flags); 2347 io_req = (struct fnic_io_req *)CMD_SP(sc); 2348 if (!io_req) { 2349 spin_unlock_irqrestore(io_lock, flags); 2350 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2351 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2352 goto fnic_device_reset_end; 2353 } 2354 io_req->dr_done = NULL; 2355 2356 status = CMD_LR_STATUS(sc); 2357 2358 /* 2359 * If lun reset not completed, bail out with failed. io_req 2360 * gets cleaned up during higher levels of EH 2361 */ 2362 if (status == FCPIO_INVALID_CODE) { 2363 atomic64_inc(&reset_stats->device_reset_timeouts); 2364 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2365 "Device reset timed out\n"); 2366 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2367 spin_unlock_irqrestore(io_lock, flags); 2368 int_to_scsilun(sc->device->lun, &fc_lun); 2369 /* 2370 * Issue abort and terminate on device reset request. 2371 * If q'ing of terminate fails, retry it after a delay. 2372 */ 2373 while (1) { 2374 spin_lock_irqsave(io_lock, flags); 2375 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2376 spin_unlock_irqrestore(io_lock, flags); 2377 break; 2378 } 2379 spin_unlock_irqrestore(io_lock, flags); 2380 if (fnic_queue_abort_io_req(fnic, 2381 tag | FNIC_TAG_DEV_RST, 2382 FCPIO_ITMF_ABT_TASK_TERM, 2383 fc_lun.scsi_lun, io_req)) { 2384 wait_for_completion_timeout(&tm_done, 2385 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2386 } else { 2387 spin_lock_irqsave(io_lock, flags); 2388 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2389 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2390 io_req->abts_done = &tm_done; 2391 spin_unlock_irqrestore(io_lock, flags); 2392 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2393 "Abort and terminate issued on Device reset " 2394 "tag 0x%x sc 0x%p\n", tag, sc); 2395 break; 2396 } 2397 } 2398 while (1) { 2399 spin_lock_irqsave(io_lock, flags); 2400 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2401 spin_unlock_irqrestore(io_lock, flags); 2402 wait_for_completion_timeout(&tm_done, 2403 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2404 break; 2405 } else { 2406 io_req = (struct fnic_io_req *)CMD_SP(sc); 2407 io_req->abts_done = NULL; 2408 goto fnic_device_reset_clean; 2409 } 2410 } 2411 } else { 2412 spin_unlock_irqrestore(io_lock, flags); 2413 } 2414 2415 /* Completed, but not successful, clean up the io_req, return fail */ 2416 if (status != FCPIO_SUCCESS) { 2417 spin_lock_irqsave(io_lock, flags); 2418 FNIC_SCSI_DBG(KERN_DEBUG, 2419 fnic->lport->host, 2420 "Device reset completed - failed\n"); 2421 io_req = (struct fnic_io_req *)CMD_SP(sc); 2422 goto fnic_device_reset_clean; 2423 } 2424 2425 /* 2426 * Clean up any aborts on this lun that have still not 2427 * completed. If any of these fail, then LUN reset fails. 2428 * clean_pending_aborts cleans all cmds on this lun except 2429 * the lun reset cmd. If all cmds get cleaned, the lun reset 2430 * succeeds 2431 */ 2432 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2433 spin_lock_irqsave(io_lock, flags); 2434 io_req = (struct fnic_io_req *)CMD_SP(sc); 2435 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2436 "Device reset failed" 2437 " since could not abort all IOs\n"); 2438 goto fnic_device_reset_clean; 2439 } 2440 2441 /* Clean lun reset command */ 2442 spin_lock_irqsave(io_lock, flags); 2443 io_req = (struct fnic_io_req *)CMD_SP(sc); 2444 if (io_req) 2445 /* Completed, and successful */ 2446 ret = SUCCESS; 2447 2448 fnic_device_reset_clean: 2449 if (io_req) 2450 CMD_SP(sc) = NULL; 2451 2452 spin_unlock_irqrestore(io_lock, flags); 2453 2454 if (io_req) { 2455 start_time = io_req->start_time; 2456 fnic_release_ioreq_buf(fnic, io_req, sc); 2457 mempool_free(io_req, fnic->io_req_pool); 2458 } 2459 2460 fnic_device_reset_end: 2461 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2462 sc->request->tag, sc, 2463 jiffies_to_msecs(jiffies - start_time), 2464 0, ((u64)sc->cmnd[0] << 32 | 2465 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2466 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2467 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2468 2469 /* free tag if it is allocated */ 2470 if (unlikely(tag_gen_flag)) 2471 fnic_scsi_host_end_tag(fnic, sc); 2472 2473 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2474 "Returning from device reset %s\n", 2475 (ret == SUCCESS) ? 2476 "SUCCESS" : "FAILED"); 2477 2478 if (ret == FAILED) 2479 atomic64_inc(&reset_stats->device_reset_failures); 2480 2481 return ret; 2482 } 2483 2484 /* Clean up all IOs, clean up libFC local port */ 2485 int fnic_reset(struct Scsi_Host *shost) 2486 { 2487 struct fc_lport *lp; 2488 struct fnic *fnic; 2489 int ret = 0; 2490 struct reset_stats *reset_stats; 2491 2492 lp = shost_priv(shost); 2493 fnic = lport_priv(lp); 2494 reset_stats = &fnic->fnic_stats.reset_stats; 2495 2496 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2497 "fnic_reset called\n"); 2498 2499 atomic64_inc(&reset_stats->fnic_resets); 2500 2501 /* 2502 * Reset local port, this will clean up libFC exchanges, 2503 * reset remote port sessions, and if link is up, begin flogi 2504 */ 2505 ret = fc_lport_reset(lp); 2506 2507 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2508 "Returning from fnic reset %s\n", 2509 (ret == 0) ? 2510 "SUCCESS" : "FAILED"); 2511 2512 if (ret == 0) 2513 atomic64_inc(&reset_stats->fnic_reset_completions); 2514 else 2515 atomic64_inc(&reset_stats->fnic_reset_failures); 2516 2517 return ret; 2518 } 2519 2520 /* 2521 * SCSI Error handling calls driver's eh_host_reset if all prior 2522 * error handling levels return FAILED. If host reset completes 2523 * successfully, and if link is up, then Fabric login begins. 2524 * 2525 * Host Reset is the highest level of error recovery. If this fails, then 2526 * host is offlined by SCSI. 2527 * 2528 */ 2529 int fnic_host_reset(struct scsi_cmnd *sc) 2530 { 2531 int ret; 2532 unsigned long wait_host_tmo; 2533 struct Scsi_Host *shost = sc->device->host; 2534 struct fc_lport *lp = shost_priv(shost); 2535 struct fnic *fnic = lport_priv(lp); 2536 unsigned long flags; 2537 2538 spin_lock_irqsave(&fnic->fnic_lock, flags); 2539 if (!fnic->internal_reset_inprogress) { 2540 fnic->internal_reset_inprogress = true; 2541 } else { 2542 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2543 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2544 "host reset in progress skipping another host reset\n"); 2545 return SUCCESS; 2546 } 2547 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2548 2549 /* 2550 * If fnic_reset is successful, wait for fabric login to complete 2551 * scsi-ml tries to send a TUR to every device if host reset is 2552 * successful, so before returning to scsi, fabric should be up 2553 */ 2554 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2555 if (ret == SUCCESS) { 2556 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2557 ret = FAILED; 2558 while (time_before(jiffies, wait_host_tmo)) { 2559 if ((lp->state == LPORT_ST_READY) && 2560 (lp->link_up)) { 2561 ret = SUCCESS; 2562 break; 2563 } 2564 ssleep(1); 2565 } 2566 } 2567 2568 spin_lock_irqsave(&fnic->fnic_lock, flags); 2569 fnic->internal_reset_inprogress = false; 2570 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2571 return ret; 2572 } 2573 2574 /* 2575 * This fxn is called from libFC when host is removed 2576 */ 2577 void fnic_scsi_abort_io(struct fc_lport *lp) 2578 { 2579 int err = 0; 2580 unsigned long flags; 2581 enum fnic_state old_state; 2582 struct fnic *fnic = lport_priv(lp); 2583 DECLARE_COMPLETION_ONSTACK(remove_wait); 2584 2585 /* Issue firmware reset for fnic, wait for reset to complete */ 2586 retry_fw_reset: 2587 spin_lock_irqsave(&fnic->fnic_lock, flags); 2588 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) && 2589 fnic->link_events) { 2590 /* fw reset is in progress, poll for its completion */ 2591 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2592 schedule_timeout(msecs_to_jiffies(100)); 2593 goto retry_fw_reset; 2594 } 2595 2596 fnic->remove_wait = &remove_wait; 2597 old_state = fnic->state; 2598 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2599 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2600 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2601 2602 err = fnic_fw_reset_handler(fnic); 2603 if (err) { 2604 spin_lock_irqsave(&fnic->fnic_lock, flags); 2605 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2606 fnic->state = old_state; 2607 fnic->remove_wait = NULL; 2608 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2609 return; 2610 } 2611 2612 /* Wait for firmware reset to complete */ 2613 wait_for_completion_timeout(&remove_wait, 2614 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2615 2616 spin_lock_irqsave(&fnic->fnic_lock, flags); 2617 fnic->remove_wait = NULL; 2618 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2619 "fnic_scsi_abort_io %s\n", 2620 (fnic->state == FNIC_IN_ETH_MODE) ? 2621 "SUCCESS" : "FAILED"); 2622 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2623 2624 } 2625 2626 /* 2627 * This fxn called from libFC to clean up driver IO state on link down 2628 */ 2629 void fnic_scsi_cleanup(struct fc_lport *lp) 2630 { 2631 unsigned long flags; 2632 enum fnic_state old_state; 2633 struct fnic *fnic = lport_priv(lp); 2634 2635 /* issue fw reset */ 2636 retry_fw_reset: 2637 spin_lock_irqsave(&fnic->fnic_lock, flags); 2638 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2639 /* fw reset is in progress, poll for its completion */ 2640 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2641 schedule_timeout(msecs_to_jiffies(100)); 2642 goto retry_fw_reset; 2643 } 2644 old_state = fnic->state; 2645 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2646 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2647 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2648 2649 if (fnic_fw_reset_handler(fnic)) { 2650 spin_lock_irqsave(&fnic->fnic_lock, flags); 2651 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2652 fnic->state = old_state; 2653 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2654 } 2655 2656 } 2657 2658 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2659 { 2660 } 2661 2662 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2663 { 2664 struct fnic *fnic = lport_priv(lp); 2665 2666 /* Non-zero sid, nothing to do */ 2667 if (sid) 2668 goto call_fc_exch_mgr_reset; 2669 2670 if (did) { 2671 fnic_rport_exch_reset(fnic, did); 2672 goto call_fc_exch_mgr_reset; 2673 } 2674 2675 /* 2676 * sid = 0, did = 0 2677 * link down or device being removed 2678 */ 2679 if (!fnic->in_remove) 2680 fnic_scsi_cleanup(lp); 2681 else 2682 fnic_scsi_abort_io(lp); 2683 2684 /* call libFC exch mgr reset to reset its exchanges */ 2685 call_fc_exch_mgr_reset: 2686 fc_exch_mgr_reset(lp, sid, did); 2687 2688 } 2689 2690 static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data, 2691 bool reserved) 2692 { 2693 struct fnic_pending_aborts_iter_data *iter_data = data; 2694 struct fnic *fnic = iter_data->fnic; 2695 int cmd_state; 2696 struct fnic_io_req *io_req; 2697 spinlock_t *io_lock; 2698 unsigned long flags; 2699 2700 /* 2701 * ignore this lun reset cmd or cmds that do not belong to 2702 * this lun 2703 */ 2704 if (iter_data->lr_sc && sc == iter_data->lr_sc) 2705 return true; 2706 if (iter_data->lun_dev && sc->device != iter_data->lun_dev) 2707 return true; 2708 2709 io_lock = fnic_io_lock_hash(fnic, sc); 2710 spin_lock_irqsave(io_lock, flags); 2711 2712 io_req = (struct fnic_io_req *)CMD_SP(sc); 2713 if (!io_req) { 2714 spin_unlock_irqrestore(io_lock, flags); 2715 return true; 2716 } 2717 2718 /* 2719 * Found IO that is still pending with firmware and 2720 * belongs to the LUN that we are resetting 2721 */ 2722 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2723 "Found IO in %s on lun\n", 2724 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2725 cmd_state = CMD_STATE(sc); 2726 spin_unlock_irqrestore(io_lock, flags); 2727 if (cmd_state == FNIC_IOREQ_ABTS_PENDING) 2728 iter_data->ret = 1; 2729 2730 return iter_data->ret ? false : true; 2731 } 2732 2733 /* 2734 * fnic_is_abts_pending() is a helper function that 2735 * walks through tag map to check if there is any IOs pending,if there is one, 2736 * then it returns 1 (true), otherwise 0 (false) 2737 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2738 * otherwise, it checks for all IOs. 2739 */ 2740 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2741 { 2742 struct fnic_pending_aborts_iter_data iter_data = { 2743 .fnic = fnic, 2744 .lun_dev = NULL, 2745 .ret = 0, 2746 }; 2747 2748 if (lr_sc) { 2749 iter_data.lun_dev = lr_sc->device; 2750 iter_data.lr_sc = lr_sc; 2751 } 2752 2753 /* walk again to check, if IOs are still pending in fw */ 2754 scsi_host_busy_iter(fnic->lport->host, 2755 fnic_abts_pending_iter, &iter_data); 2756 2757 return iter_data.ret; 2758 } 2759