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