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); 231 232 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 233 234 if (!ret) 235 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 236 "Issued fw reset\n"); 237 else { 238 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 239 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 240 "Failed to issue fw reset\n"); 241 } 242 243 return ret; 244 } 245 246 247 /* 248 * fnic_flogi_reg_handler 249 * Routine to send flogi register msg to fw 250 */ 251 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) 252 { 253 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 254 enum fcpio_flogi_reg_format_type format; 255 struct fc_lport *lp = fnic->lport; 256 u8 gw_mac[ETH_ALEN]; 257 int ret = 0; 258 unsigned long flags; 259 260 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 261 262 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 263 free_wq_copy_descs(fnic, wq); 264 265 if (!vnic_wq_copy_desc_avail(wq)) { 266 ret = -EAGAIN; 267 goto flogi_reg_ioreq_end; 268 } 269 270 if (fnic->ctlr.map_dest) { 271 memset(gw_mac, 0xff, ETH_ALEN); 272 format = FCPIO_FLOGI_REG_DEF_DEST; 273 } else { 274 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); 275 format = FCPIO_FLOGI_REG_GW_DEST; 276 } 277 278 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { 279 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, 280 fc_id, gw_mac, 281 fnic->data_src_addr, 282 lp->r_a_tov, lp->e_d_tov); 283 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 284 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", 285 fc_id, fnic->data_src_addr, gw_mac); 286 } else { 287 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, 288 format, fc_id, gw_mac); 289 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 290 "FLOGI reg issued fcid %x map %d dest %pM\n", 291 fc_id, fnic->ctlr.map_dest, gw_mac); 292 } 293 294 flogi_reg_ioreq_end: 295 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 296 return ret; 297 } 298 299 /* 300 * fnic_queue_wq_copy_desc 301 * Routine to enqueue a wq copy desc 302 */ 303 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, 304 struct vnic_wq_copy *wq, 305 struct fnic_io_req *io_req, 306 struct scsi_cmnd *sc, 307 int sg_count) 308 { 309 struct scatterlist *sg; 310 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); 311 struct fc_rport_libfc_priv *rp = rport->dd_data; 312 struct host_sg_desc *desc; 313 u8 pri_tag = 0; 314 unsigned int i; 315 unsigned long intr_flags; 316 int flags; 317 u8 exch_flags; 318 struct scsi_lun fc_lun; 319 char msg[2]; 320 321 if (sg_count) { 322 /* For each SGE, create a device desc entry */ 323 desc = io_req->sgl_list; 324 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 325 desc->addr = cpu_to_le64(sg_dma_address(sg)); 326 desc->len = cpu_to_le32(sg_dma_len(sg)); 327 desc->_resvd = 0; 328 desc++; 329 } 330 331 io_req->sgl_list_pa = pci_map_single 332 (fnic->pdev, 333 io_req->sgl_list, 334 sizeof(io_req->sgl_list[0]) * sg_count, 335 PCI_DMA_TODEVICE); 336 } 337 338 io_req->sense_buf_pa = pci_map_single(fnic->pdev, 339 sc->sense_buffer, 340 SCSI_SENSE_BUFFERSIZE, 341 PCI_DMA_FROMDEVICE); 342 343 int_to_scsilun(sc->device->lun, &fc_lun); 344 345 pri_tag = FCPIO_ICMND_PTA_SIMPLE; 346 msg[0] = MSG_SIMPLE_TAG; 347 scsi_populate_tag_msg(sc, msg); 348 if (msg[0] == MSG_ORDERED_TAG) 349 pri_tag = FCPIO_ICMND_PTA_ORDERED; 350 351 /* Enqueue the descriptor in the Copy WQ */ 352 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 353 354 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 355 free_wq_copy_descs(fnic, wq); 356 357 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 358 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 359 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 360 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 361 return SCSI_MLQUEUE_HOST_BUSY; 362 } 363 364 flags = 0; 365 if (sc->sc_data_direction == DMA_FROM_DEVICE) 366 flags = FCPIO_ICMND_RDDATA; 367 else if (sc->sc_data_direction == DMA_TO_DEVICE) 368 flags = FCPIO_ICMND_WRDATA; 369 370 exch_flags = 0; 371 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 372 (rp->flags & FC_RP_FLAGS_RETRY)) 373 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 374 375 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, 376 0, exch_flags, io_req->sgl_cnt, 377 SCSI_SENSE_BUFFERSIZE, 378 io_req->sgl_list_pa, 379 io_req->sense_buf_pa, 380 0, /* scsi cmd ref, always 0 */ 381 pri_tag, /* scsi pri and tag */ 382 flags, /* command flags */ 383 sc->cmnd, sc->cmd_len, 384 scsi_bufflen(sc), 385 fc_lun.scsi_lun, io_req->port_id, 386 rport->maxframe_size, rp->r_a_tov, 387 rp->e_d_tov); 388 389 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 390 return 0; 391 } 392 393 /* 394 * fnic_queuecommand 395 * Routine to send a scsi cdb 396 * Called with host_lock held and interrupts disabled. 397 */ 398 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) 399 { 400 struct fc_lport *lp = shost_priv(sc->device->host); 401 struct fc_rport *rport; 402 struct fnic_io_req *io_req = NULL; 403 struct fnic *fnic = lport_priv(lp); 404 struct vnic_wq_copy *wq; 405 int ret; 406 u64 cmd_trace; 407 int sg_count = 0; 408 unsigned long flags; 409 unsigned long ptr; 410 411 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 412 return SCSI_MLQUEUE_HOST_BUSY; 413 414 rport = starget_to_rport(scsi_target(sc->device)); 415 ret = fc_remote_port_chkready(rport); 416 if (ret) { 417 sc->result = ret; 418 done(sc); 419 return 0; 420 } 421 422 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 423 return SCSI_MLQUEUE_HOST_BUSY; 424 425 atomic_inc(&fnic->in_flight); 426 427 /* 428 * Release host lock, use driver resource specific locks from here. 429 * Don't re-enable interrupts in case they were disabled prior to the 430 * caller disabling them. 431 */ 432 spin_unlock(lp->host->host_lock); 433 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 434 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 435 436 /* Get a new io_req for this SCSI IO */ 437 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 438 if (!io_req) { 439 ret = SCSI_MLQUEUE_HOST_BUSY; 440 goto out; 441 } 442 memset(io_req, 0, sizeof(*io_req)); 443 444 /* Map the data buffer */ 445 sg_count = scsi_dma_map(sc); 446 if (sg_count < 0) { 447 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 448 sc->request->tag, sc, 0, sc->cmnd[0], 449 sg_count, CMD_STATE(sc)); 450 mempool_free(io_req, fnic->io_req_pool); 451 goto out; 452 } 453 454 /* Determine the type of scatter/gather list we need */ 455 io_req->sgl_cnt = sg_count; 456 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 457 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 458 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 459 460 if (sg_count) { 461 io_req->sgl_list = 462 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 463 GFP_ATOMIC); 464 if (!io_req->sgl_list) { 465 ret = SCSI_MLQUEUE_HOST_BUSY; 466 scsi_dma_unmap(sc); 467 mempool_free(io_req, fnic->io_req_pool); 468 goto out; 469 } 470 471 /* Cache sgl list allocated address before alignment */ 472 io_req->sgl_list_alloc = io_req->sgl_list; 473 ptr = (unsigned long) io_req->sgl_list; 474 if (ptr % FNIC_SG_DESC_ALIGN) { 475 io_req->sgl_list = (struct host_sg_desc *) 476 (((unsigned long) ptr 477 + FNIC_SG_DESC_ALIGN - 1) 478 & ~(FNIC_SG_DESC_ALIGN - 1)); 479 } 480 } 481 482 /* initialize rest of io_req */ 483 io_req->port_id = rport->port_id; 484 io_req->start_time = jiffies; 485 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 486 CMD_SP(sc) = (char *)io_req; 487 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; 488 sc->scsi_done = done; 489 490 /* create copy wq desc and enqueue it */ 491 wq = &fnic->wq_copy[0]; 492 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 493 if (ret) { 494 /* 495 * In case another thread cancelled the request, 496 * refetch the pointer under the lock. 497 */ 498 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc); 499 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 500 sc->request->tag, sc, 0, 0, 0, 501 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 502 spin_lock_irqsave(io_lock, flags); 503 io_req = (struct fnic_io_req *)CMD_SP(sc); 504 CMD_SP(sc) = NULL; 505 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 506 spin_unlock_irqrestore(io_lock, flags); 507 if (io_req) { 508 fnic_release_ioreq_buf(fnic, io_req, sc); 509 mempool_free(io_req, fnic->io_req_pool); 510 } 511 } else { 512 /* REVISIT: Use per IO lock in the final code */ 513 CMD_FLAGS(sc) |= FNIC_IO_ISSUED; 514 } 515 out: 516 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 517 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 518 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 519 sc->cmnd[5]); 520 521 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 522 sc->request->tag, sc, io_req, 523 sg_count, cmd_trace, 524 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); 525 atomic_dec(&fnic->in_flight); 526 /* acquire host lock before returning to SCSI */ 527 spin_lock(lp->host->host_lock); 528 return ret; 529 } 530 531 DEF_SCSI_QCMD(fnic_queuecommand) 532 533 /* 534 * fnic_fcpio_fw_reset_cmpl_handler 535 * Routine to handle fw reset completion 536 */ 537 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 538 struct fcpio_fw_req *desc) 539 { 540 u8 type; 541 u8 hdr_status; 542 struct fcpio_tag tag; 543 int ret = 0; 544 unsigned long flags; 545 546 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 547 548 /* Clean up all outstanding io requests */ 549 fnic_cleanup_io(fnic, SCSI_NO_TAG); 550 551 spin_lock_irqsave(&fnic->fnic_lock, flags); 552 553 /* fnic should be in FC_TRANS_ETH_MODE */ 554 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 555 /* Check status of reset completion */ 556 if (!hdr_status) { 557 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 558 "reset cmpl success\n"); 559 /* Ready to send flogi out */ 560 fnic->state = FNIC_IN_ETH_MODE; 561 } else { 562 FNIC_SCSI_DBG(KERN_DEBUG, 563 fnic->lport->host, 564 "fnic fw_reset : failed %s\n", 565 fnic_fcpio_status_to_str(hdr_status)); 566 567 /* 568 * Unable to change to eth mode, cannot send out flogi 569 * Change state to fc mode, so that subsequent Flogi 570 * requests from libFC will cause more attempts to 571 * reset the firmware. Free the cached flogi 572 */ 573 fnic->state = FNIC_IN_FC_MODE; 574 ret = -1; 575 } 576 } else { 577 FNIC_SCSI_DBG(KERN_DEBUG, 578 fnic->lport->host, 579 "Unexpected state %s while processing" 580 " reset cmpl\n", fnic_state_to_str(fnic->state)); 581 ret = -1; 582 } 583 584 /* Thread removing device blocks till firmware reset is complete */ 585 if (fnic->remove_wait) 586 complete(fnic->remove_wait); 587 588 /* 589 * If fnic is being removed, or fw reset failed 590 * free the flogi frame. Else, send it out 591 */ 592 if (fnic->remove_wait || ret) { 593 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 594 skb_queue_purge(&fnic->tx_queue); 595 goto reset_cmpl_handler_end; 596 } 597 598 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 599 600 fnic_flush_tx(fnic); 601 602 reset_cmpl_handler_end: 603 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 604 605 return ret; 606 } 607 608 /* 609 * fnic_fcpio_flogi_reg_cmpl_handler 610 * Routine to handle flogi register completion 611 */ 612 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 613 struct fcpio_fw_req *desc) 614 { 615 u8 type; 616 u8 hdr_status; 617 struct fcpio_tag tag; 618 int ret = 0; 619 unsigned long flags; 620 621 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 622 623 /* Update fnic state based on status of flogi reg completion */ 624 spin_lock_irqsave(&fnic->fnic_lock, flags); 625 626 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 627 628 /* Check flogi registration completion status */ 629 if (!hdr_status) { 630 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 631 "flog reg succeeded\n"); 632 fnic->state = FNIC_IN_FC_MODE; 633 } else { 634 FNIC_SCSI_DBG(KERN_DEBUG, 635 fnic->lport->host, 636 "fnic flogi reg :failed %s\n", 637 fnic_fcpio_status_to_str(hdr_status)); 638 fnic->state = FNIC_IN_ETH_MODE; 639 ret = -1; 640 } 641 } else { 642 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 643 "Unexpected fnic state %s while" 644 " processing flogi reg completion\n", 645 fnic_state_to_str(fnic->state)); 646 ret = -1; 647 } 648 649 if (!ret) { 650 if (fnic->stop_rx_link_events) { 651 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 652 goto reg_cmpl_handler_end; 653 } 654 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 655 656 fnic_flush_tx(fnic); 657 queue_work(fnic_event_queue, &fnic->frame_work); 658 } else { 659 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 660 } 661 662 reg_cmpl_handler_end: 663 return ret; 664 } 665 666 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 667 u16 request_out) 668 { 669 if (wq->to_clean_index <= wq->to_use_index) { 670 /* out of range, stale request_out index */ 671 if (request_out < wq->to_clean_index || 672 request_out >= wq->to_use_index) 673 return 0; 674 } else { 675 /* out of range, stale request_out index */ 676 if (request_out < wq->to_clean_index && 677 request_out >= wq->to_use_index) 678 return 0; 679 } 680 /* request_out index is in range */ 681 return 1; 682 } 683 684 685 /* 686 * Mark that ack received and store the Ack index. If there are multiple 687 * acks received before Tx thread cleans it up, the latest value will be 688 * used which is correct behavior. This state should be in the copy Wq 689 * instead of in the fnic 690 */ 691 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 692 unsigned int cq_index, 693 struct fcpio_fw_req *desc) 694 { 695 struct vnic_wq_copy *wq; 696 u16 request_out = desc->u.ack.request_out; 697 unsigned long flags; 698 u64 *ox_id_tag = (u64 *)(void *)desc; 699 700 /* mark the ack state */ 701 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 702 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 703 704 if (is_ack_index_in_range(wq, request_out)) { 705 fnic->fw_ack_index[0] = request_out; 706 fnic->fw_ack_recd[0] = 1; 707 } 708 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 709 FNIC_TRACE(fnic_fcpio_ack_handler, 710 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 711 ox_id_tag[4], ox_id_tag[5]); 712 } 713 714 /* 715 * fnic_fcpio_icmnd_cmpl_handler 716 * Routine to handle icmnd completions 717 */ 718 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 719 struct fcpio_fw_req *desc) 720 { 721 u8 type; 722 u8 hdr_status; 723 struct fcpio_tag tag; 724 u32 id; 725 u64 xfer_len = 0; 726 struct fcpio_icmnd_cmpl *icmnd_cmpl; 727 struct fnic_io_req *io_req; 728 struct scsi_cmnd *sc; 729 unsigned long flags; 730 spinlock_t *io_lock; 731 u64 cmd_trace; 732 unsigned long start_time; 733 734 /* Decode the cmpl description to get the io_req id */ 735 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 736 fcpio_tag_id_dec(&tag, &id); 737 icmnd_cmpl = &desc->u.icmnd_cmpl; 738 739 if (id >= fnic->fnic_max_tag_id) { 740 shost_printk(KERN_ERR, fnic->lport->host, 741 "Tag out of range tag %x hdr status = %s\n", 742 id, fnic_fcpio_status_to_str(hdr_status)); 743 return; 744 } 745 746 sc = scsi_host_find_tag(fnic->lport->host, id); 747 WARN_ON_ONCE(!sc); 748 if (!sc) { 749 shost_printk(KERN_ERR, fnic->lport->host, 750 "icmnd_cmpl sc is null - " 751 "hdr status = %s tag = 0x%x desc = 0x%p\n", 752 fnic_fcpio_status_to_str(hdr_status), id, desc); 753 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 754 fnic->lport->host->host_no, id, 755 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 756 (u64)icmnd_cmpl->_resvd0[0]), 757 ((u64)hdr_status << 16 | 758 (u64)icmnd_cmpl->scsi_status << 8 | 759 (u64)icmnd_cmpl->flags), desc, 760 (u64)icmnd_cmpl->residual, 0); 761 return; 762 } 763 764 io_lock = fnic_io_lock_hash(fnic, sc); 765 spin_lock_irqsave(io_lock, flags); 766 io_req = (struct fnic_io_req *)CMD_SP(sc); 767 WARN_ON_ONCE(!io_req); 768 if (!io_req) { 769 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; 770 spin_unlock_irqrestore(io_lock, flags); 771 shost_printk(KERN_ERR, fnic->lport->host, 772 "icmnd_cmpl io_req is null - " 773 "hdr status = %s tag = 0x%x sc 0x%p\n", 774 fnic_fcpio_status_to_str(hdr_status), id, sc); 775 return; 776 } 777 start_time = io_req->start_time; 778 779 /* firmware completed the io */ 780 io_req->io_completed = 1; 781 782 /* 783 * if SCSI-ML has already issued abort on this command, 784 * ignore completion of the IO. The abts path will clean it up 785 */ 786 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 787 spin_unlock_irqrestore(io_lock, flags); 788 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 789 switch (hdr_status) { 790 case FCPIO_SUCCESS: 791 CMD_FLAGS(sc) |= FNIC_IO_DONE; 792 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 793 "icmnd_cmpl ABTS pending hdr status = %s " 794 "sc 0x%p scsi_status %x residual %d\n", 795 fnic_fcpio_status_to_str(hdr_status), sc, 796 icmnd_cmpl->scsi_status, 797 icmnd_cmpl->residual); 798 break; 799 case FCPIO_ABORTED: 800 CMD_FLAGS(sc) |= FNIC_IO_ABORTED; 801 break; 802 default: 803 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 804 "icmnd_cmpl abts pending " 805 "hdr status = %s tag = 0x%x sc = 0x%p\n", 806 fnic_fcpio_status_to_str(hdr_status), 807 id, sc); 808 break; 809 } 810 return; 811 } 812 813 /* Mark the IO as complete */ 814 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 815 816 icmnd_cmpl = &desc->u.icmnd_cmpl; 817 818 switch (hdr_status) { 819 case FCPIO_SUCCESS: 820 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 821 xfer_len = scsi_bufflen(sc); 822 scsi_set_resid(sc, icmnd_cmpl->residual); 823 824 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) 825 xfer_len -= icmnd_cmpl->residual; 826 827 break; 828 829 case FCPIO_TIMEOUT: /* request was timed out */ 830 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 831 break; 832 833 case FCPIO_ABORTED: /* request was aborted */ 834 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 835 break; 836 837 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 838 scsi_set_resid(sc, icmnd_cmpl->residual); 839 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 840 break; 841 842 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 843 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 844 break; 845 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 846 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 847 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 848 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 849 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 850 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 851 case FCPIO_FW_ERR: /* request was terminated due fw error */ 852 default: 853 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 854 fnic_fcpio_status_to_str(hdr_status)); 855 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 856 break; 857 } 858 859 /* Break link with the SCSI command */ 860 CMD_SP(sc) = NULL; 861 CMD_FLAGS(sc) |= FNIC_IO_DONE; 862 863 spin_unlock_irqrestore(io_lock, flags); 864 865 fnic_release_ioreq_buf(fnic, io_req, sc); 866 867 mempool_free(io_req, fnic->io_req_pool); 868 869 cmd_trace = ((u64)hdr_status << 56) | 870 (u64)icmnd_cmpl->scsi_status << 48 | 871 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 872 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 873 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 874 875 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 876 sc->device->host->host_no, id, sc, 877 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 878 (u64)icmnd_cmpl->_resvd0[0] << 48 | 879 jiffies_to_msecs(jiffies - start_time)), 880 desc, cmd_trace, 881 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 882 883 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 884 fnic->lport->host_stats.fcp_input_requests++; 885 fnic->fcp_input_bytes += xfer_len; 886 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 887 fnic->lport->host_stats.fcp_output_requests++; 888 fnic->fcp_output_bytes += xfer_len; 889 } else 890 fnic->lport->host_stats.fcp_control_requests++; 891 892 /* Call SCSI completion function to complete the IO */ 893 if (sc->scsi_done) 894 sc->scsi_done(sc); 895 } 896 897 /* fnic_fcpio_itmf_cmpl_handler 898 * Routine to handle itmf completions 899 */ 900 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 901 struct fcpio_fw_req *desc) 902 { 903 u8 type; 904 u8 hdr_status; 905 struct fcpio_tag tag; 906 u32 id; 907 struct scsi_cmnd *sc; 908 struct fnic_io_req *io_req; 909 unsigned long flags; 910 spinlock_t *io_lock; 911 unsigned long start_time; 912 913 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 914 fcpio_tag_id_dec(&tag, &id); 915 916 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 917 shost_printk(KERN_ERR, fnic->lport->host, 918 "Tag out of range tag %x hdr status = %s\n", 919 id, fnic_fcpio_status_to_str(hdr_status)); 920 return; 921 } 922 923 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 924 WARN_ON_ONCE(!sc); 925 if (!sc) { 926 shost_printk(KERN_ERR, fnic->lport->host, 927 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 928 fnic_fcpio_status_to_str(hdr_status), id); 929 return; 930 } 931 io_lock = fnic_io_lock_hash(fnic, sc); 932 spin_lock_irqsave(io_lock, flags); 933 io_req = (struct fnic_io_req *)CMD_SP(sc); 934 WARN_ON_ONCE(!io_req); 935 if (!io_req) { 936 spin_unlock_irqrestore(io_lock, flags); 937 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 938 shost_printk(KERN_ERR, fnic->lport->host, 939 "itmf_cmpl io_req is null - " 940 "hdr status = %s tag = 0x%x sc 0x%p\n", 941 fnic_fcpio_status_to_str(hdr_status), id, sc); 942 return; 943 } 944 start_time = io_req->start_time; 945 946 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 947 /* Abort and terminate completion of device reset req */ 948 /* REVISIT : Add asserts about various flags */ 949 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 950 "dev reset abts cmpl recd. id %x status %s\n", 951 id, fnic_fcpio_status_to_str(hdr_status)); 952 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 953 CMD_ABTS_STATUS(sc) = hdr_status; 954 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 955 if (io_req->abts_done) 956 complete(io_req->abts_done); 957 spin_unlock_irqrestore(io_lock, flags); 958 } else if (id & FNIC_TAG_ABORT) { 959 /* Completion of abort cmd */ 960 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 961 /* This is a late completion. Ignore it */ 962 spin_unlock_irqrestore(io_lock, flags); 963 return; 964 } 965 CMD_ABTS_STATUS(sc) = hdr_status; 966 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 967 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 968 "abts cmpl recd. id %d status %s\n", 969 (int)(id & FNIC_TAG_MASK), 970 fnic_fcpio_status_to_str(hdr_status)); 971 972 /* 973 * If scsi_eh thread is blocked waiting for abts to complete, 974 * signal completion to it. IO will be cleaned in the thread 975 * else clean it in this context 976 */ 977 if (io_req->abts_done) { 978 complete(io_req->abts_done); 979 spin_unlock_irqrestore(io_lock, flags); 980 } else { 981 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 982 "abts cmpl, completing IO\n"); 983 CMD_SP(sc) = NULL; 984 sc->result = (DID_ERROR << 16); 985 986 spin_unlock_irqrestore(io_lock, flags); 987 988 fnic_release_ioreq_buf(fnic, io_req, sc); 989 mempool_free(io_req, fnic->io_req_pool); 990 if (sc->scsi_done) { 991 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 992 sc->device->host->host_no, id, 993 sc, 994 jiffies_to_msecs(jiffies - start_time), 995 desc, 996 (((u64)hdr_status << 40) | 997 (u64)sc->cmnd[0] << 32 | 998 (u64)sc->cmnd[2] << 24 | 999 (u64)sc->cmnd[3] << 16 | 1000 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1001 (((u64)CMD_FLAGS(sc) << 32) | 1002 CMD_STATE(sc))); 1003 sc->scsi_done(sc); 1004 } 1005 } 1006 1007 } else if (id & FNIC_TAG_DEV_RST) { 1008 /* Completion of device reset */ 1009 CMD_LR_STATUS(sc) = hdr_status; 1010 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1011 spin_unlock_irqrestore(io_lock, flags); 1012 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1013 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1014 sc->device->host->host_no, id, sc, 1015 jiffies_to_msecs(jiffies - start_time), 1016 desc, 0, 1017 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1018 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1019 "Terminate pending " 1020 "dev reset cmpl recd. id %d status %s\n", 1021 (int)(id & FNIC_TAG_MASK), 1022 fnic_fcpio_status_to_str(hdr_status)); 1023 return; 1024 } 1025 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1026 /* Need to wait for terminate completion */ 1027 spin_unlock_irqrestore(io_lock, flags); 1028 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1029 sc->device->host->host_no, id, sc, 1030 jiffies_to_msecs(jiffies - start_time), 1031 desc, 0, 1032 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1033 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1034 "dev reset cmpl recd after time out. " 1035 "id %d status %s\n", 1036 (int)(id & FNIC_TAG_MASK), 1037 fnic_fcpio_status_to_str(hdr_status)); 1038 return; 1039 } 1040 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1041 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1042 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1043 "dev reset cmpl recd. id %d status %s\n", 1044 (int)(id & FNIC_TAG_MASK), 1045 fnic_fcpio_status_to_str(hdr_status)); 1046 if (io_req->dr_done) 1047 complete(io_req->dr_done); 1048 spin_unlock_irqrestore(io_lock, flags); 1049 1050 } else { 1051 shost_printk(KERN_ERR, fnic->lport->host, 1052 "Unexpected itmf io state %s tag %x\n", 1053 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1054 spin_unlock_irqrestore(io_lock, flags); 1055 } 1056 1057 } 1058 1059 /* 1060 * fnic_fcpio_cmpl_handler 1061 * Routine to service the cq for wq_copy 1062 */ 1063 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1064 unsigned int cq_index, 1065 struct fcpio_fw_req *desc) 1066 { 1067 struct fnic *fnic = vnic_dev_priv(vdev); 1068 1069 switch (desc->hdr.type) { 1070 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1071 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1072 break; 1073 1074 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1075 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1076 break; 1077 1078 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1079 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1080 break; 1081 1082 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1083 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1084 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1085 break; 1086 1087 case FCPIO_RESET_CMPL: /* fw completed reset */ 1088 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1089 break; 1090 1091 default: 1092 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1093 "firmware completion type %d\n", 1094 desc->hdr.type); 1095 break; 1096 } 1097 1098 return 0; 1099 } 1100 1101 /* 1102 * fnic_wq_copy_cmpl_handler 1103 * Routine to process wq copy 1104 */ 1105 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1106 { 1107 unsigned int wq_work_done = 0; 1108 unsigned int i, cq_index; 1109 unsigned int cur_work_done; 1110 1111 for (i = 0; i < fnic->wq_copy_count; i++) { 1112 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1113 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1114 fnic_fcpio_cmpl_handler, 1115 copy_work_to_do); 1116 wq_work_done += cur_work_done; 1117 } 1118 return wq_work_done; 1119 } 1120 1121 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) 1122 { 1123 int i; 1124 struct fnic_io_req *io_req; 1125 unsigned long flags = 0; 1126 struct scsi_cmnd *sc; 1127 spinlock_t *io_lock; 1128 unsigned long start_time = 0; 1129 1130 for (i = 0; i < fnic->fnic_max_tag_id; i++) { 1131 if (i == exclude_id) 1132 continue; 1133 1134 io_lock = fnic_io_lock_tag(fnic, i); 1135 spin_lock_irqsave(io_lock, flags); 1136 sc = scsi_host_find_tag(fnic->lport->host, i); 1137 if (!sc) { 1138 spin_unlock_irqrestore(io_lock, flags); 1139 continue; 1140 } 1141 1142 io_req = (struct fnic_io_req *)CMD_SP(sc); 1143 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1144 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1145 /* 1146 * We will be here only when FW completes reset 1147 * without sending completions for outstanding ios. 1148 */ 1149 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1150 if (io_req && io_req->dr_done) 1151 complete(io_req->dr_done); 1152 else if (io_req && io_req->abts_done) 1153 complete(io_req->abts_done); 1154 spin_unlock_irqrestore(io_lock, flags); 1155 continue; 1156 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1157 spin_unlock_irqrestore(io_lock, flags); 1158 continue; 1159 } 1160 if (!io_req) { 1161 spin_unlock_irqrestore(io_lock, flags); 1162 goto cleanup_scsi_cmd; 1163 } 1164 1165 CMD_SP(sc) = NULL; 1166 1167 spin_unlock_irqrestore(io_lock, flags); 1168 1169 /* 1170 * If there is a scsi_cmnd associated with this io_req, then 1171 * free the corresponding state 1172 */ 1173 start_time = io_req->start_time; 1174 fnic_release_ioreq_buf(fnic, io_req, sc); 1175 mempool_free(io_req, fnic->io_req_pool); 1176 1177 cleanup_scsi_cmd: 1178 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1179 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:" 1180 " DID_TRANSPORT_DISRUPTED\n"); 1181 1182 /* Complete the command to SCSI */ 1183 if (sc->scsi_done) { 1184 FNIC_TRACE(fnic_cleanup_io, 1185 sc->device->host->host_no, i, sc, 1186 jiffies_to_msecs(jiffies - start_time), 1187 0, ((u64)sc->cmnd[0] << 32 | 1188 (u64)sc->cmnd[2] << 24 | 1189 (u64)sc->cmnd[3] << 16 | 1190 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1191 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1192 1193 sc->scsi_done(sc); 1194 } 1195 } 1196 } 1197 1198 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1199 struct fcpio_host_req *desc) 1200 { 1201 u32 id; 1202 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1203 struct fnic_io_req *io_req; 1204 struct scsi_cmnd *sc; 1205 unsigned long flags; 1206 spinlock_t *io_lock; 1207 unsigned long start_time = 0; 1208 1209 /* get the tag reference */ 1210 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1211 id &= FNIC_TAG_MASK; 1212 1213 if (id >= fnic->fnic_max_tag_id) 1214 return; 1215 1216 sc = scsi_host_find_tag(fnic->lport->host, id); 1217 if (!sc) 1218 return; 1219 1220 io_lock = fnic_io_lock_hash(fnic, sc); 1221 spin_lock_irqsave(io_lock, flags); 1222 1223 /* Get the IO context which this desc refers to */ 1224 io_req = (struct fnic_io_req *)CMD_SP(sc); 1225 1226 /* fnic interrupts are turned off by now */ 1227 1228 if (!io_req) { 1229 spin_unlock_irqrestore(io_lock, flags); 1230 goto wq_copy_cleanup_scsi_cmd; 1231 } 1232 1233 CMD_SP(sc) = NULL; 1234 1235 spin_unlock_irqrestore(io_lock, flags); 1236 1237 start_time = io_req->start_time; 1238 fnic_release_ioreq_buf(fnic, io_req, sc); 1239 mempool_free(io_req, fnic->io_req_pool); 1240 1241 wq_copy_cleanup_scsi_cmd: 1242 sc->result = DID_NO_CONNECT << 16; 1243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1244 " DID_NO_CONNECT\n"); 1245 1246 if (sc->scsi_done) { 1247 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1248 sc->device->host->host_no, id, sc, 1249 jiffies_to_msecs(jiffies - start_time), 1250 0, ((u64)sc->cmnd[0] << 32 | 1251 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1252 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1253 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1254 1255 sc->scsi_done(sc); 1256 } 1257 } 1258 1259 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1260 u32 task_req, u8 *fc_lun, 1261 struct fnic_io_req *io_req) 1262 { 1263 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1264 struct Scsi_Host *host = fnic->lport->host; 1265 unsigned long flags; 1266 1267 spin_lock_irqsave(host->host_lock, flags); 1268 if (unlikely(fnic_chk_state_flags_locked(fnic, 1269 FNIC_FLAGS_IO_BLOCKED))) { 1270 spin_unlock_irqrestore(host->host_lock, flags); 1271 return 1; 1272 } else 1273 atomic_inc(&fnic->in_flight); 1274 spin_unlock_irqrestore(host->host_lock, flags); 1275 1276 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1277 1278 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1279 free_wq_copy_descs(fnic, wq); 1280 1281 if (!vnic_wq_copy_desc_avail(wq)) { 1282 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1283 atomic_dec(&fnic->in_flight); 1284 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1285 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1286 return 1; 1287 } 1288 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1289 0, task_req, tag, fc_lun, io_req->port_id, 1290 fnic->config.ra_tov, fnic->config.ed_tov); 1291 1292 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1293 atomic_dec(&fnic->in_flight); 1294 1295 return 0; 1296 } 1297 1298 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1299 { 1300 int tag; 1301 int abt_tag; 1302 struct fnic_io_req *io_req; 1303 spinlock_t *io_lock; 1304 unsigned long flags; 1305 struct scsi_cmnd *sc; 1306 struct scsi_lun fc_lun; 1307 enum fnic_ioreq_state old_ioreq_state; 1308 1309 FNIC_SCSI_DBG(KERN_DEBUG, 1310 fnic->lport->host, 1311 "fnic_rport_exch_reset called portid 0x%06x\n", 1312 port_id); 1313 1314 if (fnic->in_remove) 1315 return; 1316 1317 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1318 abt_tag = tag; 1319 io_lock = fnic_io_lock_tag(fnic, tag); 1320 spin_lock_irqsave(io_lock, flags); 1321 sc = scsi_host_find_tag(fnic->lport->host, tag); 1322 if (!sc) { 1323 spin_unlock_irqrestore(io_lock, flags); 1324 continue; 1325 } 1326 1327 io_req = (struct fnic_io_req *)CMD_SP(sc); 1328 1329 if (!io_req || io_req->port_id != port_id) { 1330 spin_unlock_irqrestore(io_lock, flags); 1331 continue; 1332 } 1333 1334 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1335 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1336 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1337 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1338 sc); 1339 spin_unlock_irqrestore(io_lock, flags); 1340 continue; 1341 } 1342 1343 /* 1344 * Found IO that is still pending with firmware and 1345 * belongs to rport that went away 1346 */ 1347 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1348 spin_unlock_irqrestore(io_lock, flags); 1349 continue; 1350 } 1351 if (io_req->abts_done) { 1352 shost_printk(KERN_ERR, fnic->lport->host, 1353 "fnic_rport_exch_reset: io_req->abts_done is set " 1354 "state is %s\n", 1355 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1356 } 1357 1358 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1359 shost_printk(KERN_ERR, fnic->lport->host, 1360 "rport_exch_reset " 1361 "IO not yet issued %p tag 0x%x flags " 1362 "%x state %d\n", 1363 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1364 } 1365 old_ioreq_state = CMD_STATE(sc); 1366 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1367 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1368 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1369 abt_tag = (tag | FNIC_TAG_DEV_RST); 1370 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1371 "fnic_rport_exch_reset dev rst sc 0x%p\n", 1372 sc); 1373 } 1374 1375 BUG_ON(io_req->abts_done); 1376 1377 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1378 "fnic_rport_reset_exch: Issuing abts\n"); 1379 1380 spin_unlock_irqrestore(io_lock, flags); 1381 1382 /* Now queue the abort command to firmware */ 1383 int_to_scsilun(sc->device->lun, &fc_lun); 1384 1385 if (fnic_queue_abort_io_req(fnic, abt_tag, 1386 FCPIO_ITMF_ABT_TASK_TERM, 1387 fc_lun.scsi_lun, io_req)) { 1388 /* 1389 * Revert the cmd state back to old state, if 1390 * it hasn't changed in between. This cmd will get 1391 * aborted later by scsi_eh, or cleaned up during 1392 * lun reset 1393 */ 1394 spin_lock_irqsave(io_lock, flags); 1395 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1396 CMD_STATE(sc) = old_ioreq_state; 1397 spin_unlock_irqrestore(io_lock, flags); 1398 } else { 1399 spin_lock_irqsave(io_lock, flags); 1400 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1401 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1402 else 1403 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1404 spin_unlock_irqrestore(io_lock, flags); 1405 } 1406 } 1407 1408 } 1409 1410 void fnic_terminate_rport_io(struct fc_rport *rport) 1411 { 1412 int tag; 1413 int abt_tag; 1414 struct fnic_io_req *io_req; 1415 spinlock_t *io_lock; 1416 unsigned long flags; 1417 struct scsi_cmnd *sc; 1418 struct scsi_lun fc_lun; 1419 struct fc_rport_libfc_priv *rdata; 1420 struct fc_lport *lport; 1421 struct fnic *fnic; 1422 struct fc_rport *cmd_rport; 1423 enum fnic_ioreq_state old_ioreq_state; 1424 1425 if (!rport) { 1426 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1427 return; 1428 } 1429 rdata = rport->dd_data; 1430 1431 if (!rdata) { 1432 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1433 return; 1434 } 1435 lport = rdata->local_port; 1436 1437 if (!lport) { 1438 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1439 return; 1440 } 1441 fnic = lport_priv(lport); 1442 FNIC_SCSI_DBG(KERN_DEBUG, 1443 fnic->lport->host, "fnic_terminate_rport_io called" 1444 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1445 rport->port_name, rport->node_name, rport, 1446 rport->port_id); 1447 1448 if (fnic->in_remove) 1449 return; 1450 1451 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1452 abt_tag = tag; 1453 io_lock = fnic_io_lock_tag(fnic, tag); 1454 spin_lock_irqsave(io_lock, flags); 1455 sc = scsi_host_find_tag(fnic->lport->host, tag); 1456 if (!sc) { 1457 spin_unlock_irqrestore(io_lock, flags); 1458 continue; 1459 } 1460 1461 cmd_rport = starget_to_rport(scsi_target(sc->device)); 1462 if (rport != cmd_rport) { 1463 spin_unlock_irqrestore(io_lock, flags); 1464 continue; 1465 } 1466 1467 io_req = (struct fnic_io_req *)CMD_SP(sc); 1468 1469 if (!io_req || rport != cmd_rport) { 1470 spin_unlock_irqrestore(io_lock, flags); 1471 continue; 1472 } 1473 1474 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1475 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1476 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1477 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", 1478 sc); 1479 spin_unlock_irqrestore(io_lock, flags); 1480 continue; 1481 } 1482 /* 1483 * Found IO that is still pending with firmware and 1484 * belongs to rport that went away 1485 */ 1486 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1487 spin_unlock_irqrestore(io_lock, flags); 1488 continue; 1489 } 1490 if (io_req->abts_done) { 1491 shost_printk(KERN_ERR, fnic->lport->host, 1492 "fnic_terminate_rport_io: io_req->abts_done is set " 1493 "state is %s\n", 1494 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1495 } 1496 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1497 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1498 "fnic_terminate_rport_io " 1499 "IO not yet issued %p tag 0x%x flags " 1500 "%x state %d\n", 1501 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1502 } 1503 old_ioreq_state = CMD_STATE(sc); 1504 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1505 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1506 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1507 abt_tag = (tag | FNIC_TAG_DEV_RST); 1508 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1509 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); 1510 } 1511 1512 BUG_ON(io_req->abts_done); 1513 1514 FNIC_SCSI_DBG(KERN_DEBUG, 1515 fnic->lport->host, 1516 "fnic_terminate_rport_io: Issuing abts\n"); 1517 1518 spin_unlock_irqrestore(io_lock, flags); 1519 1520 /* Now queue the abort command to firmware */ 1521 int_to_scsilun(sc->device->lun, &fc_lun); 1522 1523 if (fnic_queue_abort_io_req(fnic, abt_tag, 1524 FCPIO_ITMF_ABT_TASK_TERM, 1525 fc_lun.scsi_lun, io_req)) { 1526 /* 1527 * Revert the cmd state back to old state, if 1528 * it hasn't changed in between. This cmd will get 1529 * aborted later by scsi_eh, or cleaned up during 1530 * lun reset 1531 */ 1532 spin_lock_irqsave(io_lock, flags); 1533 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1534 CMD_STATE(sc) = old_ioreq_state; 1535 spin_unlock_irqrestore(io_lock, flags); 1536 } else { 1537 spin_lock_irqsave(io_lock, flags); 1538 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1539 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1540 else 1541 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1542 spin_unlock_irqrestore(io_lock, flags); 1543 } 1544 } 1545 1546 } 1547 1548 /* 1549 * This function is exported to SCSI for sending abort cmnds. 1550 * A SCSI IO is represented by a io_req in the driver. 1551 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1552 */ 1553 int fnic_abort_cmd(struct scsi_cmnd *sc) 1554 { 1555 struct fc_lport *lp; 1556 struct fnic *fnic; 1557 struct fnic_io_req *io_req = NULL; 1558 struct fc_rport *rport; 1559 spinlock_t *io_lock; 1560 unsigned long flags; 1561 unsigned long start_time = 0; 1562 int ret = SUCCESS; 1563 u32 task_req = 0; 1564 struct scsi_lun fc_lun; 1565 int tag; 1566 DECLARE_COMPLETION_ONSTACK(tm_done); 1567 1568 /* Wait for rport to unblock */ 1569 fc_block_scsi_eh(sc); 1570 1571 /* Get local-port, check ready and link up */ 1572 lp = shost_priv(sc->device->host); 1573 1574 fnic = lport_priv(lp); 1575 rport = starget_to_rport(scsi_target(sc->device)); 1576 tag = sc->request->tag; 1577 FNIC_SCSI_DBG(KERN_DEBUG, 1578 fnic->lport->host, 1579 "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %x flags %x\n", 1580 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1581 1582 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1583 1584 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1585 ret = FAILED; 1586 goto fnic_abort_cmd_end; 1587 } 1588 1589 /* 1590 * Avoid a race between SCSI issuing the abort and the device 1591 * completing the command. 1592 * 1593 * If the command is already completed by the fw cmpl code, 1594 * we just return SUCCESS from here. This means that the abort 1595 * succeeded. In the SCSI ML, since the timeout for command has 1596 * happened, the completion wont actually complete the command 1597 * and it will be considered as an aborted command 1598 * 1599 * The CMD_SP will not be cleared except while holding io_req_lock. 1600 */ 1601 io_lock = fnic_io_lock_hash(fnic, sc); 1602 spin_lock_irqsave(io_lock, flags); 1603 io_req = (struct fnic_io_req *)CMD_SP(sc); 1604 if (!io_req) { 1605 spin_unlock_irqrestore(io_lock, flags); 1606 goto fnic_abort_cmd_end; 1607 } 1608 1609 io_req->abts_done = &tm_done; 1610 1611 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1612 spin_unlock_irqrestore(io_lock, flags); 1613 goto wait_pending; 1614 } 1615 /* 1616 * Command is still pending, need to abort it 1617 * If the firmware completes the command after this point, 1618 * the completion wont be done till mid-layer, since abort 1619 * has already started. 1620 */ 1621 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1622 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1623 1624 spin_unlock_irqrestore(io_lock, flags); 1625 1626 /* 1627 * Check readiness of the remote port. If the path to remote 1628 * port is up, then send abts to the remote port to terminate 1629 * the IO. Else, just locally terminate the IO in the firmware 1630 */ 1631 if (fc_remote_port_chkready(rport) == 0) 1632 task_req = FCPIO_ITMF_ABT_TASK; 1633 else 1634 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1635 1636 /* Now queue the abort command to firmware */ 1637 int_to_scsilun(sc->device->lun, &fc_lun); 1638 1639 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1640 fc_lun.scsi_lun, io_req)) { 1641 spin_lock_irqsave(io_lock, flags); 1642 io_req = (struct fnic_io_req *)CMD_SP(sc); 1643 if (io_req) 1644 io_req->abts_done = NULL; 1645 spin_unlock_irqrestore(io_lock, flags); 1646 ret = FAILED; 1647 goto fnic_abort_cmd_end; 1648 } 1649 if (task_req == FCPIO_ITMF_ABT_TASK) 1650 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1651 else 1652 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1653 1654 /* 1655 * We queued an abort IO, wait for its completion. 1656 * Once the firmware completes the abort command, it will 1657 * wake up this thread. 1658 */ 1659 wait_pending: 1660 wait_for_completion_timeout(&tm_done, 1661 msecs_to_jiffies 1662 (2 * fnic->config.ra_tov + 1663 fnic->config.ed_tov)); 1664 1665 /* Check the abort status */ 1666 spin_lock_irqsave(io_lock, flags); 1667 1668 io_req = (struct fnic_io_req *)CMD_SP(sc); 1669 if (!io_req) { 1670 spin_unlock_irqrestore(io_lock, flags); 1671 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1672 ret = FAILED; 1673 goto fnic_abort_cmd_end; 1674 } 1675 io_req->abts_done = NULL; 1676 1677 /* fw did not complete abort, timed out */ 1678 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1679 spin_unlock_irqrestore(io_lock, flags); 1680 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 1681 ret = FAILED; 1682 goto fnic_abort_cmd_end; 1683 } 1684 1685 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1686 1687 /* 1688 * firmware completed the abort, check the status, 1689 * free the io_req irrespective of failure or success 1690 */ 1691 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS) 1692 ret = FAILED; 1693 1694 CMD_SP(sc) = NULL; 1695 1696 spin_unlock_irqrestore(io_lock, flags); 1697 1698 start_time = io_req->start_time; 1699 fnic_release_ioreq_buf(fnic, io_req, sc); 1700 mempool_free(io_req, fnic->io_req_pool); 1701 1702 fnic_abort_cmd_end: 1703 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 1704 sc->request->tag, sc, 1705 jiffies_to_msecs(jiffies - start_time), 1706 0, ((u64)sc->cmnd[0] << 32 | 1707 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1708 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1709 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1710 1711 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1712 "Returning from abort cmd type %x %s\n", task_req, 1713 (ret == SUCCESS) ? 1714 "SUCCESS" : "FAILED"); 1715 return ret; 1716 } 1717 1718 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 1719 struct scsi_cmnd *sc, 1720 struct fnic_io_req *io_req) 1721 { 1722 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1723 struct Scsi_Host *host = fnic->lport->host; 1724 struct scsi_lun fc_lun; 1725 int ret = 0; 1726 unsigned long intr_flags; 1727 1728 spin_lock_irqsave(host->host_lock, intr_flags); 1729 if (unlikely(fnic_chk_state_flags_locked(fnic, 1730 FNIC_FLAGS_IO_BLOCKED))) { 1731 spin_unlock_irqrestore(host->host_lock, intr_flags); 1732 return FAILED; 1733 } else 1734 atomic_inc(&fnic->in_flight); 1735 spin_unlock_irqrestore(host->host_lock, intr_flags); 1736 1737 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 1738 1739 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1740 free_wq_copy_descs(fnic, wq); 1741 1742 if (!vnic_wq_copy_desc_avail(wq)) { 1743 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1744 "queue_dr_io_req failure - no descriptors\n"); 1745 ret = -EAGAIN; 1746 goto lr_io_req_end; 1747 } 1748 1749 /* fill in the lun info */ 1750 int_to_scsilun(sc->device->lun, &fc_lun); 1751 1752 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 1753 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 1754 fc_lun.scsi_lun, io_req->port_id, 1755 fnic->config.ra_tov, fnic->config.ed_tov); 1756 1757 lr_io_req_end: 1758 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 1759 atomic_dec(&fnic->in_flight); 1760 1761 return ret; 1762 } 1763 1764 /* 1765 * Clean up any pending aborts on the lun 1766 * For each outstanding IO on this lun, whose abort is not completed by fw, 1767 * issue a local abort. Wait for abort to complete. Return 0 if all commands 1768 * successfully aborted, 1 otherwise 1769 */ 1770 static int fnic_clean_pending_aborts(struct fnic *fnic, 1771 struct scsi_cmnd *lr_sc) 1772 { 1773 int tag, abt_tag; 1774 struct fnic_io_req *io_req; 1775 spinlock_t *io_lock; 1776 unsigned long flags; 1777 int ret = 0; 1778 struct scsi_cmnd *sc; 1779 struct scsi_lun fc_lun; 1780 struct scsi_device *lun_dev = lr_sc->device; 1781 DECLARE_COMPLETION_ONSTACK(tm_done); 1782 enum fnic_ioreq_state old_ioreq_state; 1783 1784 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1785 io_lock = fnic_io_lock_tag(fnic, tag); 1786 spin_lock_irqsave(io_lock, flags); 1787 sc = scsi_host_find_tag(fnic->lport->host, tag); 1788 /* 1789 * ignore this lun reset cmd or cmds that do not belong to 1790 * this lun 1791 */ 1792 if (!sc || sc == lr_sc || sc->device != lun_dev) { 1793 spin_unlock_irqrestore(io_lock, flags); 1794 continue; 1795 } 1796 1797 io_req = (struct fnic_io_req *)CMD_SP(sc); 1798 1799 if (!io_req || sc->device != lun_dev) { 1800 spin_unlock_irqrestore(io_lock, flags); 1801 continue; 1802 } 1803 1804 /* 1805 * Found IO that is still pending with firmware and 1806 * belongs to the LUN that we are resetting 1807 */ 1808 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1809 "Found IO in %s on lun\n", 1810 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1811 1812 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1813 spin_unlock_irqrestore(io_lock, flags); 1814 continue; 1815 } 1816 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1817 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1818 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1819 "%s dev rst not pending sc 0x%p\n", __func__, 1820 sc); 1821 spin_unlock_irqrestore(io_lock, flags); 1822 continue; 1823 } 1824 1825 if (io_req->abts_done) 1826 shost_printk(KERN_ERR, fnic->lport->host, 1827 "%s: io_req->abts_done is set state is %s\n", 1828 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 1829 old_ioreq_state = CMD_STATE(sc); 1830 /* 1831 * Any pending IO issued prior to reset is expected to be 1832 * in abts pending state, if not we need to set 1833 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 1834 * When IO is completed, the IO will be handed over and 1835 * handled in this function. 1836 */ 1837 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1838 1839 BUG_ON(io_req->abts_done); 1840 1841 abt_tag = tag; 1842 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1843 abt_tag |= FNIC_TAG_DEV_RST; 1844 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1845 "%s: dev rst sc 0x%p\n", __func__, sc); 1846 } 1847 1848 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1849 io_req->abts_done = &tm_done; 1850 spin_unlock_irqrestore(io_lock, flags); 1851 1852 /* Now queue the abort command to firmware */ 1853 int_to_scsilun(sc->device->lun, &fc_lun); 1854 1855 if (fnic_queue_abort_io_req(fnic, abt_tag, 1856 FCPIO_ITMF_ABT_TASK_TERM, 1857 fc_lun.scsi_lun, io_req)) { 1858 spin_lock_irqsave(io_lock, flags); 1859 io_req = (struct fnic_io_req *)CMD_SP(sc); 1860 if (io_req) 1861 io_req->abts_done = NULL; 1862 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1863 CMD_STATE(sc) = old_ioreq_state; 1864 spin_unlock_irqrestore(io_lock, flags); 1865 ret = 1; 1866 goto clean_pending_aborts_end; 1867 } else { 1868 spin_lock_irqsave(io_lock, flags); 1869 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1870 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1871 spin_unlock_irqrestore(io_lock, flags); 1872 } 1873 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1874 1875 wait_for_completion_timeout(&tm_done, 1876 msecs_to_jiffies 1877 (fnic->config.ed_tov)); 1878 1879 /* Recheck cmd state to check if it is now aborted */ 1880 spin_lock_irqsave(io_lock, flags); 1881 io_req = (struct fnic_io_req *)CMD_SP(sc); 1882 if (!io_req) { 1883 spin_unlock_irqrestore(io_lock, flags); 1884 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1885 continue; 1886 } 1887 1888 io_req->abts_done = NULL; 1889 1890 /* if abort is still pending with fw, fail */ 1891 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1892 spin_unlock_irqrestore(io_lock, flags); 1893 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1894 ret = 1; 1895 goto clean_pending_aborts_end; 1896 } 1897 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1898 CMD_SP(sc) = NULL; 1899 spin_unlock_irqrestore(io_lock, flags); 1900 1901 fnic_release_ioreq_buf(fnic, io_req, sc); 1902 mempool_free(io_req, fnic->io_req_pool); 1903 } 1904 1905 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 1906 1907 /* walk again to check, if IOs are still pending in fw */ 1908 if (fnic_is_abts_pending(fnic, lr_sc)) 1909 ret = FAILED; 1910 1911 clean_pending_aborts_end: 1912 return ret; 1913 } 1914 1915 /** 1916 * fnic_scsi_host_start_tag 1917 * Allocates tagid from host's tag list 1918 **/ 1919 static inline int 1920 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 1921 { 1922 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 1923 int tag, ret = SCSI_NO_TAG; 1924 1925 BUG_ON(!bqt); 1926 if (!bqt) { 1927 pr_err("Tags are not supported\n"); 1928 goto end; 1929 } 1930 1931 do { 1932 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1); 1933 if (tag >= bqt->max_depth) { 1934 pr_err("Tag allocation failure\n"); 1935 goto end; 1936 } 1937 } while (test_and_set_bit(tag, bqt->tag_map)); 1938 1939 bqt->tag_index[tag] = sc->request; 1940 sc->request->tag = tag; 1941 sc->tag = tag; 1942 if (!sc->request->special) 1943 sc->request->special = sc; 1944 1945 ret = tag; 1946 1947 end: 1948 return ret; 1949 } 1950 1951 /** 1952 * fnic_scsi_host_end_tag 1953 * frees tag allocated by fnic_scsi_host_start_tag. 1954 **/ 1955 static inline void 1956 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 1957 { 1958 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 1959 int tag = sc->request->tag; 1960 1961 if (tag == SCSI_NO_TAG) 1962 return; 1963 1964 BUG_ON(!bqt || !bqt->tag_index[tag]); 1965 if (!bqt) 1966 return; 1967 1968 bqt->tag_index[tag] = NULL; 1969 clear_bit(tag, bqt->tag_map); 1970 1971 return; 1972 } 1973 1974 /* 1975 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 1976 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 1977 * on the LUN. 1978 */ 1979 int fnic_device_reset(struct scsi_cmnd *sc) 1980 { 1981 struct fc_lport *lp; 1982 struct fnic *fnic; 1983 struct fnic_io_req *io_req = NULL; 1984 struct fc_rport *rport; 1985 int status; 1986 int ret = FAILED; 1987 spinlock_t *io_lock; 1988 unsigned long flags; 1989 unsigned long start_time = 0; 1990 struct scsi_lun fc_lun; 1991 int tag = 0; 1992 DECLARE_COMPLETION_ONSTACK(tm_done); 1993 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 1994 1995 /* Wait for rport to unblock */ 1996 fc_block_scsi_eh(sc); 1997 1998 /* Get local-port, check ready and link up */ 1999 lp = shost_priv(sc->device->host); 2000 2001 fnic = lport_priv(lp); 2002 2003 rport = starget_to_rport(scsi_target(sc->device)); 2004 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2005 "Device reset called FCID 0x%x, LUN 0x%x sc 0x%p\n", 2006 rport->port_id, sc->device->lun, sc); 2007 2008 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2009 goto fnic_device_reset_end; 2010 2011 /* Check if remote port up */ 2012 if (fc_remote_port_chkready(rport)) 2013 goto fnic_device_reset_end; 2014 2015 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2016 /* Allocate tag if not present */ 2017 2018 tag = sc->request->tag; 2019 if (unlikely(tag < 0)) { 2020 tag = fnic_scsi_host_start_tag(fnic, sc); 2021 if (unlikely(tag == SCSI_NO_TAG)) 2022 goto fnic_device_reset_end; 2023 tag_gen_flag = 1; 2024 } 2025 io_lock = fnic_io_lock_hash(fnic, sc); 2026 spin_lock_irqsave(io_lock, flags); 2027 io_req = (struct fnic_io_req *)CMD_SP(sc); 2028 2029 /* 2030 * If there is a io_req attached to this command, then use it, 2031 * else allocate a new one. 2032 */ 2033 if (!io_req) { 2034 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2035 if (!io_req) { 2036 spin_unlock_irqrestore(io_lock, flags); 2037 goto fnic_device_reset_end; 2038 } 2039 memset(io_req, 0, sizeof(*io_req)); 2040 io_req->port_id = rport->port_id; 2041 CMD_SP(sc) = (char *)io_req; 2042 } 2043 io_req->dr_done = &tm_done; 2044 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2045 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2046 spin_unlock_irqrestore(io_lock, flags); 2047 2048 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2049 2050 /* 2051 * issue the device reset, if enqueue failed, clean up the ioreq 2052 * and break assoc with scsi cmd 2053 */ 2054 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2055 spin_lock_irqsave(io_lock, flags); 2056 io_req = (struct fnic_io_req *)CMD_SP(sc); 2057 if (io_req) 2058 io_req->dr_done = NULL; 2059 goto fnic_device_reset_clean; 2060 } 2061 spin_lock_irqsave(io_lock, flags); 2062 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2063 spin_unlock_irqrestore(io_lock, flags); 2064 2065 /* 2066 * Wait on the local completion for LUN reset. The io_req may be 2067 * freed while we wait since we hold no lock. 2068 */ 2069 wait_for_completion_timeout(&tm_done, 2070 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2071 2072 spin_lock_irqsave(io_lock, flags); 2073 io_req = (struct fnic_io_req *)CMD_SP(sc); 2074 if (!io_req) { 2075 spin_unlock_irqrestore(io_lock, flags); 2076 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2077 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2078 goto fnic_device_reset_end; 2079 } 2080 io_req->dr_done = NULL; 2081 2082 status = CMD_LR_STATUS(sc); 2083 2084 /* 2085 * If lun reset not completed, bail out with failed. io_req 2086 * gets cleaned up during higher levels of EH 2087 */ 2088 if (status == FCPIO_INVALID_CODE) { 2089 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2090 "Device reset timed out\n"); 2091 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2092 spin_unlock_irqrestore(io_lock, flags); 2093 int_to_scsilun(sc->device->lun, &fc_lun); 2094 /* 2095 * Issue abort and terminate on device reset request. 2096 * If q'ing of terminate fails, retry it after a delay. 2097 */ 2098 while (1) { 2099 spin_lock_irqsave(io_lock, flags); 2100 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2101 spin_unlock_irqrestore(io_lock, flags); 2102 break; 2103 } 2104 spin_unlock_irqrestore(io_lock, flags); 2105 if (fnic_queue_abort_io_req(fnic, 2106 tag | FNIC_TAG_DEV_RST, 2107 FCPIO_ITMF_ABT_TASK_TERM, 2108 fc_lun.scsi_lun, io_req)) { 2109 wait_for_completion_timeout(&tm_done, 2110 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2111 } else { 2112 spin_lock_irqsave(io_lock, flags); 2113 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2114 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2115 io_req->abts_done = &tm_done; 2116 spin_unlock_irqrestore(io_lock, flags); 2117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2118 "Abort and terminate issued on Device reset " 2119 "tag 0x%x sc 0x%p\n", tag, sc); 2120 break; 2121 } 2122 } 2123 while (1) { 2124 spin_lock_irqsave(io_lock, flags); 2125 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2126 spin_unlock_irqrestore(io_lock, flags); 2127 wait_for_completion_timeout(&tm_done, 2128 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2129 break; 2130 } else { 2131 io_req = (struct fnic_io_req *)CMD_SP(sc); 2132 io_req->abts_done = NULL; 2133 goto fnic_device_reset_clean; 2134 } 2135 } 2136 } else { 2137 spin_unlock_irqrestore(io_lock, flags); 2138 } 2139 2140 /* Completed, but not successful, clean up the io_req, return fail */ 2141 if (status != FCPIO_SUCCESS) { 2142 spin_lock_irqsave(io_lock, flags); 2143 FNIC_SCSI_DBG(KERN_DEBUG, 2144 fnic->lport->host, 2145 "Device reset completed - failed\n"); 2146 io_req = (struct fnic_io_req *)CMD_SP(sc); 2147 goto fnic_device_reset_clean; 2148 } 2149 2150 /* 2151 * Clean up any aborts on this lun that have still not 2152 * completed. If any of these fail, then LUN reset fails. 2153 * clean_pending_aborts cleans all cmds on this lun except 2154 * the lun reset cmd. If all cmds get cleaned, the lun reset 2155 * succeeds 2156 */ 2157 if (fnic_clean_pending_aborts(fnic, sc)) { 2158 spin_lock_irqsave(io_lock, flags); 2159 io_req = (struct fnic_io_req *)CMD_SP(sc); 2160 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2161 "Device reset failed" 2162 " since could not abort all IOs\n"); 2163 goto fnic_device_reset_clean; 2164 } 2165 2166 /* Clean lun reset command */ 2167 spin_lock_irqsave(io_lock, flags); 2168 io_req = (struct fnic_io_req *)CMD_SP(sc); 2169 if (io_req) 2170 /* Completed, and successful */ 2171 ret = SUCCESS; 2172 2173 fnic_device_reset_clean: 2174 if (io_req) 2175 CMD_SP(sc) = NULL; 2176 2177 spin_unlock_irqrestore(io_lock, flags); 2178 2179 if (io_req) { 2180 start_time = io_req->start_time; 2181 fnic_release_ioreq_buf(fnic, io_req, sc); 2182 mempool_free(io_req, fnic->io_req_pool); 2183 } 2184 2185 fnic_device_reset_end: 2186 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2187 sc->request->tag, sc, 2188 jiffies_to_msecs(jiffies - start_time), 2189 0, ((u64)sc->cmnd[0] << 32 | 2190 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2191 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2192 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2193 2194 /* free tag if it is allocated */ 2195 if (unlikely(tag_gen_flag)) 2196 fnic_scsi_host_end_tag(fnic, sc); 2197 2198 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2199 "Returning from device reset %s\n", 2200 (ret == SUCCESS) ? 2201 "SUCCESS" : "FAILED"); 2202 return ret; 2203 } 2204 2205 /* Clean up all IOs, clean up libFC local port */ 2206 int fnic_reset(struct Scsi_Host *shost) 2207 { 2208 struct fc_lport *lp; 2209 struct fnic *fnic; 2210 int ret = SUCCESS; 2211 2212 lp = shost_priv(shost); 2213 fnic = lport_priv(lp); 2214 2215 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2216 "fnic_reset called\n"); 2217 2218 /* 2219 * Reset local port, this will clean up libFC exchanges, 2220 * reset remote port sessions, and if link is up, begin flogi 2221 */ 2222 if (lp->tt.lport_reset(lp)) 2223 ret = FAILED; 2224 2225 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2226 "Returning from fnic reset %s\n", 2227 (ret == SUCCESS) ? 2228 "SUCCESS" : "FAILED"); 2229 2230 return ret; 2231 } 2232 2233 /* 2234 * SCSI Error handling calls driver's eh_host_reset if all prior 2235 * error handling levels return FAILED. If host reset completes 2236 * successfully, and if link is up, then Fabric login begins. 2237 * 2238 * Host Reset is the highest level of error recovery. If this fails, then 2239 * host is offlined by SCSI. 2240 * 2241 */ 2242 int fnic_host_reset(struct scsi_cmnd *sc) 2243 { 2244 int ret; 2245 unsigned long wait_host_tmo; 2246 struct Scsi_Host *shost = sc->device->host; 2247 struct fc_lport *lp = shost_priv(shost); 2248 2249 /* 2250 * If fnic_reset is successful, wait for fabric login to complete 2251 * scsi-ml tries to send a TUR to every device if host reset is 2252 * successful, so before returning to scsi, fabric should be up 2253 */ 2254 ret = fnic_reset(shost); 2255 if (ret == SUCCESS) { 2256 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2257 ret = FAILED; 2258 while (time_before(jiffies, wait_host_tmo)) { 2259 if ((lp->state == LPORT_ST_READY) && 2260 (lp->link_up)) { 2261 ret = SUCCESS; 2262 break; 2263 } 2264 ssleep(1); 2265 } 2266 } 2267 2268 return ret; 2269 } 2270 2271 /* 2272 * This fxn is called from libFC when host is removed 2273 */ 2274 void fnic_scsi_abort_io(struct fc_lport *lp) 2275 { 2276 int err = 0; 2277 unsigned long flags; 2278 enum fnic_state old_state; 2279 struct fnic *fnic = lport_priv(lp); 2280 DECLARE_COMPLETION_ONSTACK(remove_wait); 2281 2282 /* Issue firmware reset for fnic, wait for reset to complete */ 2283 retry_fw_reset: 2284 spin_lock_irqsave(&fnic->fnic_lock, flags); 2285 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2286 /* fw reset is in progress, poll for its completion */ 2287 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2288 schedule_timeout(msecs_to_jiffies(100)); 2289 goto retry_fw_reset; 2290 } 2291 2292 fnic->remove_wait = &remove_wait; 2293 old_state = fnic->state; 2294 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2295 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2296 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2297 2298 err = fnic_fw_reset_handler(fnic); 2299 if (err) { 2300 spin_lock_irqsave(&fnic->fnic_lock, flags); 2301 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2302 fnic->state = old_state; 2303 fnic->remove_wait = NULL; 2304 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2305 return; 2306 } 2307 2308 /* Wait for firmware reset to complete */ 2309 wait_for_completion_timeout(&remove_wait, 2310 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2311 2312 spin_lock_irqsave(&fnic->fnic_lock, flags); 2313 fnic->remove_wait = NULL; 2314 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2315 "fnic_scsi_abort_io %s\n", 2316 (fnic->state == FNIC_IN_ETH_MODE) ? 2317 "SUCCESS" : "FAILED"); 2318 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2319 2320 } 2321 2322 /* 2323 * This fxn called from libFC to clean up driver IO state on link down 2324 */ 2325 void fnic_scsi_cleanup(struct fc_lport *lp) 2326 { 2327 unsigned long flags; 2328 enum fnic_state old_state; 2329 struct fnic *fnic = lport_priv(lp); 2330 2331 /* issue fw reset */ 2332 retry_fw_reset: 2333 spin_lock_irqsave(&fnic->fnic_lock, flags); 2334 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2335 /* fw reset is in progress, poll for its completion */ 2336 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2337 schedule_timeout(msecs_to_jiffies(100)); 2338 goto retry_fw_reset; 2339 } 2340 old_state = fnic->state; 2341 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2342 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2343 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2344 2345 if (fnic_fw_reset_handler(fnic)) { 2346 spin_lock_irqsave(&fnic->fnic_lock, flags); 2347 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2348 fnic->state = old_state; 2349 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2350 } 2351 2352 } 2353 2354 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2355 { 2356 } 2357 2358 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2359 { 2360 struct fnic *fnic = lport_priv(lp); 2361 2362 /* Non-zero sid, nothing to do */ 2363 if (sid) 2364 goto call_fc_exch_mgr_reset; 2365 2366 if (did) { 2367 fnic_rport_exch_reset(fnic, did); 2368 goto call_fc_exch_mgr_reset; 2369 } 2370 2371 /* 2372 * sid = 0, did = 0 2373 * link down or device being removed 2374 */ 2375 if (!fnic->in_remove) 2376 fnic_scsi_cleanup(lp); 2377 else 2378 fnic_scsi_abort_io(lp); 2379 2380 /* call libFC exch mgr reset to reset its exchanges */ 2381 call_fc_exch_mgr_reset: 2382 fc_exch_mgr_reset(lp, sid, did); 2383 2384 } 2385 2386 /* 2387 * fnic_is_abts_pending() is a helper function that 2388 * walks through tag map to check if there is any IOs pending,if there is one, 2389 * then it returns 1 (true), otherwise 0 (false) 2390 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2391 * otherwise, it checks for all IOs. 2392 */ 2393 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2394 { 2395 int tag; 2396 struct fnic_io_req *io_req; 2397 spinlock_t *io_lock; 2398 unsigned long flags; 2399 int ret = 0; 2400 struct scsi_cmnd *sc; 2401 struct scsi_device *lun_dev = NULL; 2402 2403 if (lr_sc) 2404 lun_dev = lr_sc->device; 2405 2406 /* walk again to check, if IOs are still pending in fw */ 2407 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2408 sc = scsi_host_find_tag(fnic->lport->host, tag); 2409 /* 2410 * ignore this lun reset cmd or cmds that do not belong to 2411 * this lun 2412 */ 2413 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) 2414 continue; 2415 2416 io_lock = fnic_io_lock_hash(fnic, sc); 2417 spin_lock_irqsave(io_lock, flags); 2418 2419 io_req = (struct fnic_io_req *)CMD_SP(sc); 2420 2421 if (!io_req || sc->device != lun_dev) { 2422 spin_unlock_irqrestore(io_lock, flags); 2423 continue; 2424 } 2425 2426 /* 2427 * Found IO that is still pending with firmware and 2428 * belongs to the LUN that we are resetting 2429 */ 2430 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2431 "Found IO in %s on lun\n", 2432 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2433 2434 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2435 ret = 1; 2436 spin_unlock_irqrestore(io_lock, flags); 2437 } 2438 2439 return ret; 2440 } 2441