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 /* 115 * Unmap the data buffer and sense buffer for an io_req, 116 * also unmap and free the device-private scatter/gather list. 117 */ 118 static void fnic_release_ioreq_buf(struct fnic *fnic, 119 struct fnic_io_req *io_req, 120 struct scsi_cmnd *sc) 121 { 122 if (io_req->sgl_list_pa) 123 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa, 124 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, 125 PCI_DMA_TODEVICE); 126 scsi_dma_unmap(sc); 127 128 if (io_req->sgl_cnt) 129 mempool_free(io_req->sgl_list_alloc, 130 fnic->io_sgl_pool[io_req->sgl_type]); 131 if (io_req->sense_buf_pa) 132 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa, 133 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE); 134 } 135 136 /* Free up Copy Wq descriptors. Called with copy_wq lock held */ 137 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq) 138 { 139 /* if no Ack received from firmware, then nothing to clean */ 140 if (!fnic->fw_ack_recd[0]) 141 return 1; 142 143 /* 144 * Update desc_available count based on number of freed descriptors 145 * Account for wraparound 146 */ 147 if (wq->to_clean_index <= fnic->fw_ack_index[0]) 148 wq->ring.desc_avail += (fnic->fw_ack_index[0] 149 - wq->to_clean_index + 1); 150 else 151 wq->ring.desc_avail += (wq->ring.desc_count 152 - wq->to_clean_index 153 + fnic->fw_ack_index[0] + 1); 154 155 /* 156 * just bump clean index to ack_index+1 accounting for wraparound 157 * this will essentially free up all descriptors between 158 * to_clean_index and fw_ack_index, both inclusive 159 */ 160 wq->to_clean_index = 161 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count; 162 163 /* we have processed the acks received so far */ 164 fnic->fw_ack_recd[0] = 0; 165 return 0; 166 } 167 168 169 /** 170 * __fnic_set_state_flags 171 * Sets/Clears bits in fnic's state_flags 172 **/ 173 void 174 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags, 175 unsigned long clearbits) 176 { 177 struct Scsi_Host *host = fnic->lport->host; 178 int sh_locked = spin_is_locked(host->host_lock); 179 unsigned long flags = 0; 180 181 if (!sh_locked) 182 spin_lock_irqsave(host->host_lock, flags); 183 184 if (clearbits) 185 fnic->state_flags &= ~st_flags; 186 else 187 fnic->state_flags |= st_flags; 188 189 if (!sh_locked) 190 spin_unlock_irqrestore(host->host_lock, flags); 191 192 return; 193 } 194 195 196 /* 197 * fnic_fw_reset_handler 198 * Routine to send reset msg to fw 199 */ 200 int fnic_fw_reset_handler(struct fnic *fnic) 201 { 202 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 203 int ret = 0; 204 unsigned long flags; 205 206 /* indicate fwreset to io path */ 207 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); 208 209 skb_queue_purge(&fnic->frame_queue); 210 skb_queue_purge(&fnic->tx_queue); 211 212 /* wait for io cmpl */ 213 while (atomic_read(&fnic->in_flight)) 214 schedule_timeout(msecs_to_jiffies(1)); 215 216 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 217 218 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 219 free_wq_copy_descs(fnic, wq); 220 221 if (!vnic_wq_copy_desc_avail(wq)) 222 ret = -EAGAIN; 223 else 224 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); 225 226 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 227 228 if (!ret) 229 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 230 "Issued fw reset\n"); 231 else { 232 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 233 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 234 "Failed to issue fw reset\n"); 235 } 236 237 return ret; 238 } 239 240 241 /* 242 * fnic_flogi_reg_handler 243 * Routine to send flogi register msg to fw 244 */ 245 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) 246 { 247 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 248 enum fcpio_flogi_reg_format_type format; 249 struct fc_lport *lp = fnic->lport; 250 u8 gw_mac[ETH_ALEN]; 251 int ret = 0; 252 unsigned long flags; 253 254 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 255 256 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 257 free_wq_copy_descs(fnic, wq); 258 259 if (!vnic_wq_copy_desc_avail(wq)) { 260 ret = -EAGAIN; 261 goto flogi_reg_ioreq_end; 262 } 263 264 if (fnic->ctlr.map_dest) { 265 memset(gw_mac, 0xff, ETH_ALEN); 266 format = FCPIO_FLOGI_REG_DEF_DEST; 267 } else { 268 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); 269 format = FCPIO_FLOGI_REG_GW_DEST; 270 } 271 272 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { 273 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, 274 fc_id, gw_mac, 275 fnic->data_src_addr, 276 lp->r_a_tov, lp->e_d_tov); 277 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 278 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", 279 fc_id, fnic->data_src_addr, gw_mac); 280 } else { 281 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, 282 format, fc_id, gw_mac); 283 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 284 "FLOGI reg issued fcid %x map %d dest %pM\n", 285 fc_id, fnic->ctlr.map_dest, gw_mac); 286 } 287 288 flogi_reg_ioreq_end: 289 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 290 return ret; 291 } 292 293 /* 294 * fnic_queue_wq_copy_desc 295 * Routine to enqueue a wq copy desc 296 */ 297 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, 298 struct vnic_wq_copy *wq, 299 struct fnic_io_req *io_req, 300 struct scsi_cmnd *sc, 301 int sg_count) 302 { 303 struct scatterlist *sg; 304 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); 305 struct fc_rport_libfc_priv *rp = rport->dd_data; 306 struct host_sg_desc *desc; 307 u8 pri_tag = 0; 308 unsigned int i; 309 unsigned long intr_flags; 310 int flags; 311 u8 exch_flags; 312 struct scsi_lun fc_lun; 313 char msg[2]; 314 315 if (sg_count) { 316 /* For each SGE, create a device desc entry */ 317 desc = io_req->sgl_list; 318 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 319 desc->addr = cpu_to_le64(sg_dma_address(sg)); 320 desc->len = cpu_to_le32(sg_dma_len(sg)); 321 desc->_resvd = 0; 322 desc++; 323 } 324 325 io_req->sgl_list_pa = pci_map_single 326 (fnic->pdev, 327 io_req->sgl_list, 328 sizeof(io_req->sgl_list[0]) * sg_count, 329 PCI_DMA_TODEVICE); 330 } 331 332 io_req->sense_buf_pa = pci_map_single(fnic->pdev, 333 sc->sense_buffer, 334 SCSI_SENSE_BUFFERSIZE, 335 PCI_DMA_FROMDEVICE); 336 337 int_to_scsilun(sc->device->lun, &fc_lun); 338 339 pri_tag = FCPIO_ICMND_PTA_SIMPLE; 340 msg[0] = MSG_SIMPLE_TAG; 341 scsi_populate_tag_msg(sc, msg); 342 if (msg[0] == MSG_ORDERED_TAG) 343 pri_tag = FCPIO_ICMND_PTA_ORDERED; 344 345 /* Enqueue the descriptor in the Copy WQ */ 346 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 347 348 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 349 free_wq_copy_descs(fnic, wq); 350 351 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 352 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 353 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 354 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 355 return SCSI_MLQUEUE_HOST_BUSY; 356 } 357 358 flags = 0; 359 if (sc->sc_data_direction == DMA_FROM_DEVICE) 360 flags = FCPIO_ICMND_RDDATA; 361 else if (sc->sc_data_direction == DMA_TO_DEVICE) 362 flags = FCPIO_ICMND_WRDATA; 363 364 exch_flags = 0; 365 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 366 (rp->flags & FC_RP_FLAGS_RETRY)) 367 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 368 369 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, 370 0, exch_flags, io_req->sgl_cnt, 371 SCSI_SENSE_BUFFERSIZE, 372 io_req->sgl_list_pa, 373 io_req->sense_buf_pa, 374 0, /* scsi cmd ref, always 0 */ 375 pri_tag, /* scsi pri and tag */ 376 flags, /* command flags */ 377 sc->cmnd, sc->cmd_len, 378 scsi_bufflen(sc), 379 fc_lun.scsi_lun, io_req->port_id, 380 rport->maxframe_size, rp->r_a_tov, 381 rp->e_d_tov); 382 383 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 384 return 0; 385 } 386 387 /* 388 * fnic_queuecommand 389 * Routine to send a scsi cdb 390 * Called with host_lock held and interrupts disabled. 391 */ 392 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) 393 { 394 struct fc_lport *lp = shost_priv(sc->device->host); 395 struct fc_rport *rport; 396 struct fnic_io_req *io_req = NULL; 397 struct fnic *fnic = lport_priv(lp); 398 struct vnic_wq_copy *wq; 399 int ret; 400 u64 cmd_trace; 401 int sg_count = 0; 402 unsigned long flags; 403 unsigned long ptr; 404 405 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 406 return SCSI_MLQUEUE_HOST_BUSY; 407 408 rport = starget_to_rport(scsi_target(sc->device)); 409 ret = fc_remote_port_chkready(rport); 410 if (ret) { 411 sc->result = ret; 412 done(sc); 413 return 0; 414 } 415 416 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 417 return SCSI_MLQUEUE_HOST_BUSY; 418 419 atomic_inc(&fnic->in_flight); 420 421 /* 422 * Release host lock, use driver resource specific locks from here. 423 * Don't re-enable interrupts in case they were disabled prior to the 424 * caller disabling them. 425 */ 426 spin_unlock(lp->host->host_lock); 427 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 428 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 429 430 /* Get a new io_req for this SCSI IO */ 431 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 432 if (!io_req) { 433 ret = SCSI_MLQUEUE_HOST_BUSY; 434 goto out; 435 } 436 memset(io_req, 0, sizeof(*io_req)); 437 438 /* Map the data buffer */ 439 sg_count = scsi_dma_map(sc); 440 if (sg_count < 0) { 441 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 442 sc->request->tag, sc, 0, sc->cmnd[0], 443 sg_count, CMD_STATE(sc)); 444 mempool_free(io_req, fnic->io_req_pool); 445 goto out; 446 } 447 448 /* Determine the type of scatter/gather list we need */ 449 io_req->sgl_cnt = sg_count; 450 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 451 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 452 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 453 454 if (sg_count) { 455 io_req->sgl_list = 456 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 457 GFP_ATOMIC); 458 if (!io_req->sgl_list) { 459 ret = SCSI_MLQUEUE_HOST_BUSY; 460 scsi_dma_unmap(sc); 461 mempool_free(io_req, fnic->io_req_pool); 462 goto out; 463 } 464 465 /* Cache sgl list allocated address before alignment */ 466 io_req->sgl_list_alloc = io_req->sgl_list; 467 ptr = (unsigned long) io_req->sgl_list; 468 if (ptr % FNIC_SG_DESC_ALIGN) { 469 io_req->sgl_list = (struct host_sg_desc *) 470 (((unsigned long) ptr 471 + FNIC_SG_DESC_ALIGN - 1) 472 & ~(FNIC_SG_DESC_ALIGN - 1)); 473 } 474 } 475 476 /* initialize rest of io_req */ 477 io_req->port_id = rport->port_id; 478 io_req->start_time = jiffies; 479 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 480 CMD_SP(sc) = (char *)io_req; 481 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; 482 sc->scsi_done = done; 483 484 /* create copy wq desc and enqueue it */ 485 wq = &fnic->wq_copy[0]; 486 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 487 if (ret) { 488 /* 489 * In case another thread cancelled the request, 490 * refetch the pointer under the lock. 491 */ 492 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc); 493 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 494 sc->request->tag, sc, 0, 0, 0, 495 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 496 spin_lock_irqsave(io_lock, flags); 497 io_req = (struct fnic_io_req *)CMD_SP(sc); 498 CMD_SP(sc) = NULL; 499 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 500 spin_unlock_irqrestore(io_lock, flags); 501 if (io_req) { 502 fnic_release_ioreq_buf(fnic, io_req, sc); 503 mempool_free(io_req, fnic->io_req_pool); 504 } 505 } else { 506 /* REVISIT: Use per IO lock in the final code */ 507 CMD_FLAGS(sc) |= FNIC_IO_ISSUED; 508 } 509 out: 510 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 511 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 512 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 513 sc->cmnd[5]); 514 515 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 516 sc->request->tag, sc, io_req, 517 sg_count, cmd_trace, 518 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); 519 atomic_dec(&fnic->in_flight); 520 /* acquire host lock before returning to SCSI */ 521 spin_lock(lp->host->host_lock); 522 return ret; 523 } 524 525 DEF_SCSI_QCMD(fnic_queuecommand) 526 527 /* 528 * fnic_fcpio_fw_reset_cmpl_handler 529 * Routine to handle fw reset completion 530 */ 531 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 532 struct fcpio_fw_req *desc) 533 { 534 u8 type; 535 u8 hdr_status; 536 struct fcpio_tag tag; 537 int ret = 0; 538 unsigned long flags; 539 540 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 541 542 /* Clean up all outstanding io requests */ 543 fnic_cleanup_io(fnic, SCSI_NO_TAG); 544 545 spin_lock_irqsave(&fnic->fnic_lock, flags); 546 547 /* fnic should be in FC_TRANS_ETH_MODE */ 548 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 549 /* Check status of reset completion */ 550 if (!hdr_status) { 551 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 552 "reset cmpl success\n"); 553 /* Ready to send flogi out */ 554 fnic->state = FNIC_IN_ETH_MODE; 555 } else { 556 FNIC_SCSI_DBG(KERN_DEBUG, 557 fnic->lport->host, 558 "fnic fw_reset : failed %s\n", 559 fnic_fcpio_status_to_str(hdr_status)); 560 561 /* 562 * Unable to change to eth mode, cannot send out flogi 563 * Change state to fc mode, so that subsequent Flogi 564 * requests from libFC will cause more attempts to 565 * reset the firmware. Free the cached flogi 566 */ 567 fnic->state = FNIC_IN_FC_MODE; 568 ret = -1; 569 } 570 } else { 571 FNIC_SCSI_DBG(KERN_DEBUG, 572 fnic->lport->host, 573 "Unexpected state %s while processing" 574 " reset cmpl\n", fnic_state_to_str(fnic->state)); 575 ret = -1; 576 } 577 578 /* Thread removing device blocks till firmware reset is complete */ 579 if (fnic->remove_wait) 580 complete(fnic->remove_wait); 581 582 /* 583 * If fnic is being removed, or fw reset failed 584 * free the flogi frame. Else, send it out 585 */ 586 if (fnic->remove_wait || ret) { 587 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 588 skb_queue_purge(&fnic->tx_queue); 589 goto reset_cmpl_handler_end; 590 } 591 592 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 593 594 fnic_flush_tx(fnic); 595 596 reset_cmpl_handler_end: 597 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 598 599 return ret; 600 } 601 602 /* 603 * fnic_fcpio_flogi_reg_cmpl_handler 604 * Routine to handle flogi register completion 605 */ 606 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 607 struct fcpio_fw_req *desc) 608 { 609 u8 type; 610 u8 hdr_status; 611 struct fcpio_tag tag; 612 int ret = 0; 613 unsigned long flags; 614 615 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 616 617 /* Update fnic state based on status of flogi reg completion */ 618 spin_lock_irqsave(&fnic->fnic_lock, flags); 619 620 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 621 622 /* Check flogi registration completion status */ 623 if (!hdr_status) { 624 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 625 "flog reg succeeded\n"); 626 fnic->state = FNIC_IN_FC_MODE; 627 } else { 628 FNIC_SCSI_DBG(KERN_DEBUG, 629 fnic->lport->host, 630 "fnic flogi reg :failed %s\n", 631 fnic_fcpio_status_to_str(hdr_status)); 632 fnic->state = FNIC_IN_ETH_MODE; 633 ret = -1; 634 } 635 } else { 636 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 637 "Unexpected fnic state %s while" 638 " processing flogi reg completion\n", 639 fnic_state_to_str(fnic->state)); 640 ret = -1; 641 } 642 643 if (!ret) { 644 if (fnic->stop_rx_link_events) { 645 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 646 goto reg_cmpl_handler_end; 647 } 648 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 649 650 fnic_flush_tx(fnic); 651 queue_work(fnic_event_queue, &fnic->frame_work); 652 } else { 653 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 654 } 655 656 reg_cmpl_handler_end: 657 return ret; 658 } 659 660 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 661 u16 request_out) 662 { 663 if (wq->to_clean_index <= wq->to_use_index) { 664 /* out of range, stale request_out index */ 665 if (request_out < wq->to_clean_index || 666 request_out >= wq->to_use_index) 667 return 0; 668 } else { 669 /* out of range, stale request_out index */ 670 if (request_out < wq->to_clean_index && 671 request_out >= wq->to_use_index) 672 return 0; 673 } 674 /* request_out index is in range */ 675 return 1; 676 } 677 678 679 /* 680 * Mark that ack received and store the Ack index. If there are multiple 681 * acks received before Tx thread cleans it up, the latest value will be 682 * used which is correct behavior. This state should be in the copy Wq 683 * instead of in the fnic 684 */ 685 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 686 unsigned int cq_index, 687 struct fcpio_fw_req *desc) 688 { 689 struct vnic_wq_copy *wq; 690 u16 request_out = desc->u.ack.request_out; 691 unsigned long flags; 692 u64 *ox_id_tag = (u64 *)(void *)desc; 693 694 /* mark the ack state */ 695 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 696 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 697 698 if (is_ack_index_in_range(wq, request_out)) { 699 fnic->fw_ack_index[0] = request_out; 700 fnic->fw_ack_recd[0] = 1; 701 } 702 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 703 FNIC_TRACE(fnic_fcpio_ack_handler, 704 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 705 ox_id_tag[4], ox_id_tag[5]); 706 } 707 708 /* 709 * fnic_fcpio_icmnd_cmpl_handler 710 * Routine to handle icmnd completions 711 */ 712 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 713 struct fcpio_fw_req *desc) 714 { 715 u8 type; 716 u8 hdr_status; 717 struct fcpio_tag tag; 718 u32 id; 719 u64 xfer_len = 0; 720 struct fcpio_icmnd_cmpl *icmnd_cmpl; 721 struct fnic_io_req *io_req; 722 struct scsi_cmnd *sc; 723 unsigned long flags; 724 spinlock_t *io_lock; 725 u64 cmd_trace; 726 unsigned long start_time; 727 728 /* Decode the cmpl description to get the io_req id */ 729 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 730 fcpio_tag_id_dec(&tag, &id); 731 icmnd_cmpl = &desc->u.icmnd_cmpl; 732 733 if (id >= FNIC_MAX_IO_REQ) { 734 shost_printk(KERN_ERR, fnic->lport->host, 735 "Tag out of range tag %x hdr status = %s\n", 736 id, fnic_fcpio_status_to_str(hdr_status)); 737 return; 738 } 739 740 sc = scsi_host_find_tag(fnic->lport->host, id); 741 WARN_ON_ONCE(!sc); 742 if (!sc) { 743 shost_printk(KERN_ERR, fnic->lport->host, 744 "icmnd_cmpl sc is null - " 745 "hdr status = %s tag = 0x%x desc = 0x%p\n", 746 fnic_fcpio_status_to_str(hdr_status), id, desc); 747 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 748 fnic->lport->host->host_no, id, 749 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 750 (u64)icmnd_cmpl->_resvd0[0]), 751 ((u64)hdr_status << 16 | 752 (u64)icmnd_cmpl->scsi_status << 8 | 753 (u64)icmnd_cmpl->flags), desc, 754 (u64)icmnd_cmpl->residual, 0); 755 return; 756 } 757 758 io_lock = fnic_io_lock_hash(fnic, sc); 759 spin_lock_irqsave(io_lock, flags); 760 io_req = (struct fnic_io_req *)CMD_SP(sc); 761 WARN_ON_ONCE(!io_req); 762 if (!io_req) { 763 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; 764 spin_unlock_irqrestore(io_lock, flags); 765 shost_printk(KERN_ERR, fnic->lport->host, 766 "icmnd_cmpl io_req is null - " 767 "hdr status = %s tag = 0x%x sc 0x%p\n", 768 fnic_fcpio_status_to_str(hdr_status), id, sc); 769 return; 770 } 771 start_time = io_req->start_time; 772 773 /* firmware completed the io */ 774 io_req->io_completed = 1; 775 776 /* 777 * if SCSI-ML has already issued abort on this command, 778 * ignore completion of the IO. The abts path will clean it up 779 */ 780 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 781 spin_unlock_irqrestore(io_lock, flags); 782 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 783 switch (hdr_status) { 784 case FCPIO_SUCCESS: 785 CMD_FLAGS(sc) |= FNIC_IO_DONE; 786 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 787 "icmnd_cmpl ABTS pending hdr status = %s " 788 "sc 0x%p scsi_status %x residual %d\n", 789 fnic_fcpio_status_to_str(hdr_status), sc, 790 icmnd_cmpl->scsi_status, 791 icmnd_cmpl->residual); 792 break; 793 case FCPIO_ABORTED: 794 CMD_FLAGS(sc) |= FNIC_IO_ABORTED; 795 break; 796 default: 797 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 798 "icmnd_cmpl abts pending " 799 "hdr status = %s tag = 0x%x sc = 0x%p\n", 800 fnic_fcpio_status_to_str(hdr_status), 801 id, sc); 802 break; 803 } 804 return; 805 } 806 807 /* Mark the IO as complete */ 808 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 809 810 icmnd_cmpl = &desc->u.icmnd_cmpl; 811 812 switch (hdr_status) { 813 case FCPIO_SUCCESS: 814 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 815 xfer_len = scsi_bufflen(sc); 816 scsi_set_resid(sc, icmnd_cmpl->residual); 817 818 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) 819 xfer_len -= icmnd_cmpl->residual; 820 821 /* 822 * If queue_full, then try to reduce queue depth for all 823 * LUNS on the target. Todo: this should be accompanied 824 * by a periodic queue_depth rampup based on successful 825 * IO completion. 826 */ 827 if (icmnd_cmpl->scsi_status == QUEUE_FULL) { 828 struct scsi_device *t_sdev; 829 int qd = 0; 830 831 shost_for_each_device(t_sdev, sc->device->host) { 832 if (t_sdev->id != sc->device->id) 833 continue; 834 835 if (t_sdev->queue_depth > 1) { 836 qd = scsi_track_queue_full 837 (t_sdev, 838 t_sdev->queue_depth - 1); 839 if (qd == -1) 840 qd = t_sdev->host->cmd_per_lun; 841 shost_printk(KERN_INFO, 842 fnic->lport->host, 843 "scsi[%d:%d:%d:%d" 844 "] queue full detected," 845 "new depth = %d\n", 846 t_sdev->host->host_no, 847 t_sdev->channel, 848 t_sdev->id, t_sdev->lun, 849 t_sdev->queue_depth); 850 } 851 } 852 } 853 break; 854 855 case FCPIO_TIMEOUT: /* request was timed out */ 856 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 857 break; 858 859 case FCPIO_ABORTED: /* request was aborted */ 860 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 861 break; 862 863 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 864 scsi_set_resid(sc, icmnd_cmpl->residual); 865 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 866 break; 867 868 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 869 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 870 break; 871 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 872 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 873 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 874 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 875 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 876 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 877 case FCPIO_FW_ERR: /* request was terminated due fw error */ 878 default: 879 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 880 fnic_fcpio_status_to_str(hdr_status)); 881 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 882 break; 883 } 884 885 /* Break link with the SCSI command */ 886 CMD_SP(sc) = NULL; 887 CMD_FLAGS(sc) |= FNIC_IO_DONE; 888 889 spin_unlock_irqrestore(io_lock, flags); 890 891 fnic_release_ioreq_buf(fnic, io_req, sc); 892 893 mempool_free(io_req, fnic->io_req_pool); 894 895 cmd_trace = ((u64)hdr_status << 56) | 896 (u64)icmnd_cmpl->scsi_status << 48 | 897 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 898 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 899 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 900 901 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 902 sc->device->host->host_no, id, sc, 903 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 904 (u64)icmnd_cmpl->_resvd0[0] << 48 | 905 jiffies_to_msecs(jiffies - start_time)), 906 desc, cmd_trace, 907 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 908 909 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 910 fnic->lport->host_stats.fcp_input_requests++; 911 fnic->fcp_input_bytes += xfer_len; 912 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 913 fnic->lport->host_stats.fcp_output_requests++; 914 fnic->fcp_output_bytes += xfer_len; 915 } else 916 fnic->lport->host_stats.fcp_control_requests++; 917 918 /* Call SCSI completion function to complete the IO */ 919 if (sc->scsi_done) 920 sc->scsi_done(sc); 921 } 922 923 /* fnic_fcpio_itmf_cmpl_handler 924 * Routine to handle itmf completions 925 */ 926 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 927 struct fcpio_fw_req *desc) 928 { 929 u8 type; 930 u8 hdr_status; 931 struct fcpio_tag tag; 932 u32 id; 933 struct scsi_cmnd *sc; 934 struct fnic_io_req *io_req; 935 unsigned long flags; 936 spinlock_t *io_lock; 937 unsigned long start_time; 938 939 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 940 fcpio_tag_id_dec(&tag, &id); 941 942 if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ) { 943 shost_printk(KERN_ERR, fnic->lport->host, 944 "Tag out of range tag %x hdr status = %s\n", 945 id, fnic_fcpio_status_to_str(hdr_status)); 946 return; 947 } 948 949 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 950 WARN_ON_ONCE(!sc); 951 if (!sc) { 952 shost_printk(KERN_ERR, fnic->lport->host, 953 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 954 fnic_fcpio_status_to_str(hdr_status), id); 955 return; 956 } 957 io_lock = fnic_io_lock_hash(fnic, sc); 958 spin_lock_irqsave(io_lock, flags); 959 io_req = (struct fnic_io_req *)CMD_SP(sc); 960 WARN_ON_ONCE(!io_req); 961 if (!io_req) { 962 spin_unlock_irqrestore(io_lock, flags); 963 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 964 shost_printk(KERN_ERR, fnic->lport->host, 965 "itmf_cmpl io_req is null - " 966 "hdr status = %s tag = 0x%x sc 0x%p\n", 967 fnic_fcpio_status_to_str(hdr_status), id, sc); 968 return; 969 } 970 start_time = io_req->start_time; 971 972 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 973 /* Abort and terminate completion of device reset req */ 974 /* REVISIT : Add asserts about various flags */ 975 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 976 "dev reset abts cmpl recd. id %x status %s\n", 977 id, fnic_fcpio_status_to_str(hdr_status)); 978 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 979 CMD_ABTS_STATUS(sc) = hdr_status; 980 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 981 if (io_req->abts_done) 982 complete(io_req->abts_done); 983 spin_unlock_irqrestore(io_lock, flags); 984 } else if (id & FNIC_TAG_ABORT) { 985 /* Completion of abort cmd */ 986 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 987 /* This is a late completion. Ignore it */ 988 spin_unlock_irqrestore(io_lock, flags); 989 return; 990 } 991 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 992 CMD_ABTS_STATUS(sc) = hdr_status; 993 994 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 995 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 996 "abts cmpl recd. id %d status %s\n", 997 (int)(id & FNIC_TAG_MASK), 998 fnic_fcpio_status_to_str(hdr_status)); 999 1000 /* 1001 * If scsi_eh thread is blocked waiting for abts to complete, 1002 * signal completion to it. IO will be cleaned in the thread 1003 * else clean it in this context 1004 */ 1005 if (io_req->abts_done) { 1006 complete(io_req->abts_done); 1007 spin_unlock_irqrestore(io_lock, flags); 1008 } else { 1009 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1010 "abts cmpl, completing IO\n"); 1011 CMD_SP(sc) = NULL; 1012 sc->result = (DID_ERROR << 16); 1013 1014 spin_unlock_irqrestore(io_lock, flags); 1015 1016 fnic_release_ioreq_buf(fnic, io_req, sc); 1017 mempool_free(io_req, fnic->io_req_pool); 1018 if (sc->scsi_done) { 1019 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1020 sc->device->host->host_no, id, 1021 sc, 1022 jiffies_to_msecs(jiffies - start_time), 1023 desc, 1024 (((u64)hdr_status << 40) | 1025 (u64)sc->cmnd[0] << 32 | 1026 (u64)sc->cmnd[2] << 24 | 1027 (u64)sc->cmnd[3] << 16 | 1028 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1029 (((u64)CMD_FLAGS(sc) << 32) | 1030 CMD_STATE(sc))); 1031 sc->scsi_done(sc); 1032 } 1033 } 1034 1035 } else if (id & FNIC_TAG_DEV_RST) { 1036 /* Completion of device reset */ 1037 CMD_LR_STATUS(sc) = hdr_status; 1038 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1039 spin_unlock_irqrestore(io_lock, flags); 1040 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1041 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1042 sc->device->host->host_no, id, sc, 1043 jiffies_to_msecs(jiffies - start_time), 1044 desc, 0, 1045 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1046 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1047 "Terminate pending " 1048 "dev reset cmpl recd. id %d status %s\n", 1049 (int)(id & FNIC_TAG_MASK), 1050 fnic_fcpio_status_to_str(hdr_status)); 1051 return; 1052 } 1053 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1054 /* Need to wait for terminate completion */ 1055 spin_unlock_irqrestore(io_lock, flags); 1056 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1057 sc->device->host->host_no, id, sc, 1058 jiffies_to_msecs(jiffies - start_time), 1059 desc, 0, 1060 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1061 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1062 "dev reset cmpl recd after time out. " 1063 "id %d status %s\n", 1064 (int)(id & FNIC_TAG_MASK), 1065 fnic_fcpio_status_to_str(hdr_status)); 1066 return; 1067 } 1068 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1069 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1070 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1071 "dev reset cmpl recd. id %d status %s\n", 1072 (int)(id & FNIC_TAG_MASK), 1073 fnic_fcpio_status_to_str(hdr_status)); 1074 if (io_req->dr_done) 1075 complete(io_req->dr_done); 1076 spin_unlock_irqrestore(io_lock, flags); 1077 1078 } else { 1079 shost_printk(KERN_ERR, fnic->lport->host, 1080 "Unexpected itmf io state %s tag %x\n", 1081 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1082 spin_unlock_irqrestore(io_lock, flags); 1083 } 1084 1085 } 1086 1087 /* 1088 * fnic_fcpio_cmpl_handler 1089 * Routine to service the cq for wq_copy 1090 */ 1091 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1092 unsigned int cq_index, 1093 struct fcpio_fw_req *desc) 1094 { 1095 struct fnic *fnic = vnic_dev_priv(vdev); 1096 1097 switch (desc->hdr.type) { 1098 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1099 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1100 break; 1101 1102 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1103 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1104 break; 1105 1106 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1107 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1108 break; 1109 1110 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1111 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1112 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1113 break; 1114 1115 case FCPIO_RESET_CMPL: /* fw completed reset */ 1116 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1117 break; 1118 1119 default: 1120 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1121 "firmware completion type %d\n", 1122 desc->hdr.type); 1123 break; 1124 } 1125 1126 return 0; 1127 } 1128 1129 /* 1130 * fnic_wq_copy_cmpl_handler 1131 * Routine to process wq copy 1132 */ 1133 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1134 { 1135 unsigned int wq_work_done = 0; 1136 unsigned int i, cq_index; 1137 unsigned int cur_work_done; 1138 1139 for (i = 0; i < fnic->wq_copy_count; i++) { 1140 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1141 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1142 fnic_fcpio_cmpl_handler, 1143 copy_work_to_do); 1144 wq_work_done += cur_work_done; 1145 } 1146 return wq_work_done; 1147 } 1148 1149 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) 1150 { 1151 unsigned int i; 1152 struct fnic_io_req *io_req; 1153 unsigned long flags = 0; 1154 struct scsi_cmnd *sc; 1155 spinlock_t *io_lock; 1156 unsigned long start_time = 0; 1157 1158 for (i = 0; i < FNIC_MAX_IO_REQ; i++) { 1159 if (i == exclude_id) 1160 continue; 1161 1162 sc = scsi_host_find_tag(fnic->lport->host, i); 1163 if (!sc) 1164 continue; 1165 1166 io_lock = fnic_io_lock_hash(fnic, sc); 1167 spin_lock_irqsave(io_lock, flags); 1168 io_req = (struct fnic_io_req *)CMD_SP(sc); 1169 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1170 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1171 /* 1172 * We will be here only when FW completes reset 1173 * without sending completions for outstanding ios. 1174 */ 1175 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1176 if (io_req && io_req->dr_done) 1177 complete(io_req->dr_done); 1178 else if (io_req && io_req->abts_done) 1179 complete(io_req->abts_done); 1180 spin_unlock_irqrestore(io_lock, flags); 1181 continue; 1182 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1183 spin_unlock_irqrestore(io_lock, flags); 1184 continue; 1185 } 1186 if (!io_req) { 1187 spin_unlock_irqrestore(io_lock, flags); 1188 goto cleanup_scsi_cmd; 1189 } 1190 1191 CMD_SP(sc) = NULL; 1192 1193 spin_unlock_irqrestore(io_lock, flags); 1194 1195 /* 1196 * If there is a scsi_cmnd associated with this io_req, then 1197 * free the corresponding state 1198 */ 1199 start_time = io_req->start_time; 1200 fnic_release_ioreq_buf(fnic, io_req, sc); 1201 mempool_free(io_req, fnic->io_req_pool); 1202 1203 cleanup_scsi_cmd: 1204 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1205 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:" 1206 " DID_TRANSPORT_DISRUPTED\n"); 1207 1208 /* Complete the command to SCSI */ 1209 if (sc->scsi_done) { 1210 FNIC_TRACE(fnic_cleanup_io, 1211 sc->device->host->host_no, i, sc, 1212 jiffies_to_msecs(jiffies - start_time), 1213 0, ((u64)sc->cmnd[0] << 32 | 1214 (u64)sc->cmnd[2] << 24 | 1215 (u64)sc->cmnd[3] << 16 | 1216 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1217 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1218 1219 sc->scsi_done(sc); 1220 } 1221 } 1222 } 1223 1224 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1225 struct fcpio_host_req *desc) 1226 { 1227 u32 id; 1228 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1229 struct fnic_io_req *io_req; 1230 struct scsi_cmnd *sc; 1231 unsigned long flags; 1232 spinlock_t *io_lock; 1233 unsigned long start_time = 0; 1234 1235 /* get the tag reference */ 1236 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1237 id &= FNIC_TAG_MASK; 1238 1239 if (id >= FNIC_MAX_IO_REQ) 1240 return; 1241 1242 sc = scsi_host_find_tag(fnic->lport->host, id); 1243 if (!sc) 1244 return; 1245 1246 io_lock = fnic_io_lock_hash(fnic, sc); 1247 spin_lock_irqsave(io_lock, flags); 1248 1249 /* Get the IO context which this desc refers to */ 1250 io_req = (struct fnic_io_req *)CMD_SP(sc); 1251 1252 /* fnic interrupts are turned off by now */ 1253 1254 if (!io_req) { 1255 spin_unlock_irqrestore(io_lock, flags); 1256 goto wq_copy_cleanup_scsi_cmd; 1257 } 1258 1259 CMD_SP(sc) = NULL; 1260 1261 spin_unlock_irqrestore(io_lock, flags); 1262 1263 start_time = io_req->start_time; 1264 fnic_release_ioreq_buf(fnic, io_req, sc); 1265 mempool_free(io_req, fnic->io_req_pool); 1266 1267 wq_copy_cleanup_scsi_cmd: 1268 sc->result = DID_NO_CONNECT << 16; 1269 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1270 " DID_NO_CONNECT\n"); 1271 1272 if (sc->scsi_done) { 1273 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1274 sc->device->host->host_no, id, sc, 1275 jiffies_to_msecs(jiffies - start_time), 1276 0, ((u64)sc->cmnd[0] << 32 | 1277 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1278 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1279 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1280 1281 sc->scsi_done(sc); 1282 } 1283 } 1284 1285 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1286 u32 task_req, u8 *fc_lun, 1287 struct fnic_io_req *io_req) 1288 { 1289 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1290 struct Scsi_Host *host = fnic->lport->host; 1291 unsigned long flags; 1292 1293 spin_lock_irqsave(host->host_lock, flags); 1294 if (unlikely(fnic_chk_state_flags_locked(fnic, 1295 FNIC_FLAGS_IO_BLOCKED))) { 1296 spin_unlock_irqrestore(host->host_lock, flags); 1297 return 1; 1298 } else 1299 atomic_inc(&fnic->in_flight); 1300 spin_unlock_irqrestore(host->host_lock, flags); 1301 1302 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1303 1304 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1305 free_wq_copy_descs(fnic, wq); 1306 1307 if (!vnic_wq_copy_desc_avail(wq)) { 1308 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1309 atomic_dec(&fnic->in_flight); 1310 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1311 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1312 return 1; 1313 } 1314 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1315 0, task_req, tag, fc_lun, io_req->port_id, 1316 fnic->config.ra_tov, fnic->config.ed_tov); 1317 1318 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1319 atomic_dec(&fnic->in_flight); 1320 1321 return 0; 1322 } 1323 1324 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1325 { 1326 int tag; 1327 int abt_tag; 1328 struct fnic_io_req *io_req; 1329 spinlock_t *io_lock; 1330 unsigned long flags; 1331 struct scsi_cmnd *sc; 1332 struct scsi_lun fc_lun; 1333 enum fnic_ioreq_state old_ioreq_state; 1334 1335 FNIC_SCSI_DBG(KERN_DEBUG, 1336 fnic->lport->host, 1337 "fnic_rport_exch_reset called portid 0x%06x\n", 1338 port_id); 1339 1340 if (fnic->in_remove) 1341 return; 1342 1343 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) { 1344 abt_tag = tag; 1345 sc = scsi_host_find_tag(fnic->lport->host, tag); 1346 if (!sc) 1347 continue; 1348 1349 io_lock = fnic_io_lock_hash(fnic, sc); 1350 spin_lock_irqsave(io_lock, flags); 1351 1352 io_req = (struct fnic_io_req *)CMD_SP(sc); 1353 1354 if (!io_req || io_req->port_id != port_id) { 1355 spin_unlock_irqrestore(io_lock, flags); 1356 continue; 1357 } 1358 1359 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1360 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1361 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1362 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1363 sc); 1364 spin_unlock_irqrestore(io_lock, flags); 1365 continue; 1366 } 1367 1368 /* 1369 * Found IO that is still pending with firmware and 1370 * belongs to rport that went away 1371 */ 1372 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1373 spin_unlock_irqrestore(io_lock, flags); 1374 continue; 1375 } 1376 if (io_req->abts_done) { 1377 shost_printk(KERN_ERR, fnic->lport->host, 1378 "fnic_rport_exch_reset: io_req->abts_done is set " 1379 "state is %s\n", 1380 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1381 } 1382 1383 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1384 shost_printk(KERN_ERR, fnic->lport->host, 1385 "rport_exch_reset " 1386 "IO not yet issued %p tag 0x%x flags " 1387 "%x state %d\n", 1388 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1389 } 1390 old_ioreq_state = CMD_STATE(sc); 1391 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1392 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1393 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1394 abt_tag = (tag | FNIC_TAG_DEV_RST); 1395 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1396 "fnic_rport_exch_reset dev rst sc 0x%p\n", 1397 sc); 1398 } 1399 1400 BUG_ON(io_req->abts_done); 1401 1402 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1403 "fnic_rport_reset_exch: Issuing abts\n"); 1404 1405 spin_unlock_irqrestore(io_lock, flags); 1406 1407 /* Now queue the abort command to firmware */ 1408 int_to_scsilun(sc->device->lun, &fc_lun); 1409 1410 if (fnic_queue_abort_io_req(fnic, abt_tag, 1411 FCPIO_ITMF_ABT_TASK_TERM, 1412 fc_lun.scsi_lun, io_req)) { 1413 /* 1414 * Revert the cmd state back to old state, if 1415 * it hasn't changed in between. This cmd will get 1416 * aborted later by scsi_eh, or cleaned up during 1417 * lun reset 1418 */ 1419 spin_lock_irqsave(io_lock, flags); 1420 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1421 CMD_STATE(sc) = old_ioreq_state; 1422 spin_unlock_irqrestore(io_lock, flags); 1423 } else { 1424 spin_lock_irqsave(io_lock, flags); 1425 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1426 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1427 else 1428 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1429 spin_unlock_irqrestore(io_lock, flags); 1430 } 1431 } 1432 1433 } 1434 1435 void fnic_terminate_rport_io(struct fc_rport *rport) 1436 { 1437 int tag; 1438 int abt_tag; 1439 struct fnic_io_req *io_req; 1440 spinlock_t *io_lock; 1441 unsigned long flags; 1442 struct scsi_cmnd *sc; 1443 struct scsi_lun fc_lun; 1444 struct fc_rport_libfc_priv *rdata = rport->dd_data; 1445 struct fc_lport *lport = rdata->local_port; 1446 struct fnic *fnic = lport_priv(lport); 1447 struct fc_rport *cmd_rport; 1448 enum fnic_ioreq_state old_ioreq_state; 1449 1450 FNIC_SCSI_DBG(KERN_DEBUG, 1451 fnic->lport->host, "fnic_terminate_rport_io called" 1452 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1453 rport->port_name, rport->node_name, rport, 1454 rport->port_id); 1455 1456 if (fnic->in_remove) 1457 return; 1458 1459 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) { 1460 abt_tag = tag; 1461 sc = scsi_host_find_tag(fnic->lport->host, tag); 1462 if (!sc) 1463 continue; 1464 1465 cmd_rport = starget_to_rport(scsi_target(sc->device)); 1466 if (rport != cmd_rport) 1467 continue; 1468 1469 io_lock = fnic_io_lock_hash(fnic, sc); 1470 spin_lock_irqsave(io_lock, flags); 1471 1472 io_req = (struct fnic_io_req *)CMD_SP(sc); 1473 1474 if (!io_req || rport != cmd_rport) { 1475 spin_unlock_irqrestore(io_lock, flags); 1476 continue; 1477 } 1478 1479 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1480 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1481 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1482 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", 1483 sc); 1484 spin_unlock_irqrestore(io_lock, flags); 1485 continue; 1486 } 1487 /* 1488 * Found IO that is still pending with firmware and 1489 * belongs to rport that went away 1490 */ 1491 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1492 spin_unlock_irqrestore(io_lock, flags); 1493 continue; 1494 } 1495 if (io_req->abts_done) { 1496 shost_printk(KERN_ERR, fnic->lport->host, 1497 "fnic_terminate_rport_io: io_req->abts_done is set " 1498 "state is %s\n", 1499 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1500 } 1501 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1502 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1503 "fnic_terminate_rport_io " 1504 "IO not yet issued %p tag 0x%x flags " 1505 "%x state %d\n", 1506 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1507 } 1508 old_ioreq_state = CMD_STATE(sc); 1509 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1510 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1511 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1512 abt_tag = (tag | FNIC_TAG_DEV_RST); 1513 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1514 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); 1515 } 1516 1517 BUG_ON(io_req->abts_done); 1518 1519 FNIC_SCSI_DBG(KERN_DEBUG, 1520 fnic->lport->host, 1521 "fnic_terminate_rport_io: Issuing abts\n"); 1522 1523 spin_unlock_irqrestore(io_lock, flags); 1524 1525 /* Now queue the abort command to firmware */ 1526 int_to_scsilun(sc->device->lun, &fc_lun); 1527 1528 if (fnic_queue_abort_io_req(fnic, abt_tag, 1529 FCPIO_ITMF_ABT_TASK_TERM, 1530 fc_lun.scsi_lun, io_req)) { 1531 /* 1532 * Revert the cmd state back to old state, if 1533 * it hasn't changed in between. This cmd will get 1534 * aborted later by scsi_eh, or cleaned up during 1535 * lun reset 1536 */ 1537 spin_lock_irqsave(io_lock, flags); 1538 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1539 CMD_STATE(sc) = old_ioreq_state; 1540 spin_unlock_irqrestore(io_lock, flags); 1541 } else { 1542 spin_lock_irqsave(io_lock, flags); 1543 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1544 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1545 else 1546 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1547 spin_unlock_irqrestore(io_lock, flags); 1548 } 1549 } 1550 1551 } 1552 1553 /* 1554 * This function is exported to SCSI for sending abort cmnds. 1555 * A SCSI IO is represented by a io_req in the driver. 1556 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1557 */ 1558 int fnic_abort_cmd(struct scsi_cmnd *sc) 1559 { 1560 struct fc_lport *lp; 1561 struct fnic *fnic; 1562 struct fnic_io_req *io_req = NULL; 1563 struct fc_rport *rport; 1564 spinlock_t *io_lock; 1565 unsigned long flags; 1566 unsigned long start_time = 0; 1567 int ret = SUCCESS; 1568 u32 task_req = 0; 1569 struct scsi_lun fc_lun; 1570 int tag; 1571 DECLARE_COMPLETION_ONSTACK(tm_done); 1572 1573 /* Wait for rport to unblock */ 1574 fc_block_scsi_eh(sc); 1575 1576 /* Get local-port, check ready and link up */ 1577 lp = shost_priv(sc->device->host); 1578 1579 fnic = lport_priv(lp); 1580 rport = starget_to_rport(scsi_target(sc->device)); 1581 tag = sc->request->tag; 1582 FNIC_SCSI_DBG(KERN_DEBUG, 1583 fnic->lport->host, 1584 "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %x flags %x\n", 1585 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1586 1587 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1588 1589 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1590 ret = FAILED; 1591 goto fnic_abort_cmd_end; 1592 } 1593 1594 /* 1595 * Avoid a race between SCSI issuing the abort and the device 1596 * completing the command. 1597 * 1598 * If the command is already completed by the fw cmpl code, 1599 * we just return SUCCESS from here. This means that the abort 1600 * succeeded. In the SCSI ML, since the timeout for command has 1601 * happened, the completion wont actually complete the command 1602 * and it will be considered as an aborted command 1603 * 1604 * The CMD_SP will not be cleared except while holding io_req_lock. 1605 */ 1606 io_lock = fnic_io_lock_hash(fnic, sc); 1607 spin_lock_irqsave(io_lock, flags); 1608 io_req = (struct fnic_io_req *)CMD_SP(sc); 1609 if (!io_req) { 1610 spin_unlock_irqrestore(io_lock, flags); 1611 goto fnic_abort_cmd_end; 1612 } 1613 1614 io_req->abts_done = &tm_done; 1615 1616 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1617 spin_unlock_irqrestore(io_lock, flags); 1618 goto wait_pending; 1619 } 1620 /* 1621 * Command is still pending, need to abort it 1622 * If the firmware completes the command after this point, 1623 * the completion wont be done till mid-layer, since abort 1624 * has already started. 1625 */ 1626 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1627 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1628 1629 spin_unlock_irqrestore(io_lock, flags); 1630 1631 /* 1632 * Check readiness of the remote port. If the path to remote 1633 * port is up, then send abts to the remote port to terminate 1634 * the IO. Else, just locally terminate the IO in the firmware 1635 */ 1636 if (fc_remote_port_chkready(rport) == 0) 1637 task_req = FCPIO_ITMF_ABT_TASK; 1638 else 1639 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1640 1641 /* Now queue the abort command to firmware */ 1642 int_to_scsilun(sc->device->lun, &fc_lun); 1643 1644 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1645 fc_lun.scsi_lun, io_req)) { 1646 spin_lock_irqsave(io_lock, flags); 1647 io_req = (struct fnic_io_req *)CMD_SP(sc); 1648 if (io_req) 1649 io_req->abts_done = NULL; 1650 spin_unlock_irqrestore(io_lock, flags); 1651 ret = FAILED; 1652 goto fnic_abort_cmd_end; 1653 } 1654 if (task_req == FCPIO_ITMF_ABT_TASK) 1655 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1656 else 1657 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1658 1659 /* 1660 * We queued an abort IO, wait for its completion. 1661 * Once the firmware completes the abort command, it will 1662 * wake up this thread. 1663 */ 1664 wait_pending: 1665 wait_for_completion_timeout(&tm_done, 1666 msecs_to_jiffies 1667 (2 * fnic->config.ra_tov + 1668 fnic->config.ed_tov)); 1669 1670 /* Check the abort status */ 1671 spin_lock_irqsave(io_lock, flags); 1672 1673 io_req = (struct fnic_io_req *)CMD_SP(sc); 1674 if (!io_req) { 1675 spin_unlock_irqrestore(io_lock, flags); 1676 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1677 ret = FAILED; 1678 goto fnic_abort_cmd_end; 1679 } 1680 io_req->abts_done = NULL; 1681 1682 /* fw did not complete abort, timed out */ 1683 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1684 spin_unlock_irqrestore(io_lock, flags); 1685 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 1686 ret = FAILED; 1687 goto fnic_abort_cmd_end; 1688 } 1689 1690 /* 1691 * firmware completed the abort, check the status, 1692 * free the io_req irrespective of failure or success 1693 */ 1694 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS) 1695 ret = FAILED; 1696 1697 CMD_SP(sc) = NULL; 1698 1699 spin_unlock_irqrestore(io_lock, flags); 1700 1701 start_time = io_req->start_time; 1702 fnic_release_ioreq_buf(fnic, io_req, sc); 1703 mempool_free(io_req, fnic->io_req_pool); 1704 1705 fnic_abort_cmd_end: 1706 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 1707 sc->request->tag, sc, 1708 jiffies_to_msecs(jiffies - start_time), 1709 0, ((u64)sc->cmnd[0] << 32 | 1710 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1711 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1712 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1713 1714 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1715 "Returning from abort cmd type %x %s\n", task_req, 1716 (ret == SUCCESS) ? 1717 "SUCCESS" : "FAILED"); 1718 return ret; 1719 } 1720 1721 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 1722 struct scsi_cmnd *sc, 1723 struct fnic_io_req *io_req) 1724 { 1725 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1726 struct Scsi_Host *host = fnic->lport->host; 1727 struct scsi_lun fc_lun; 1728 int ret = 0; 1729 unsigned long intr_flags; 1730 1731 spin_lock_irqsave(host->host_lock, intr_flags); 1732 if (unlikely(fnic_chk_state_flags_locked(fnic, 1733 FNIC_FLAGS_IO_BLOCKED))) { 1734 spin_unlock_irqrestore(host->host_lock, intr_flags); 1735 return FAILED; 1736 } else 1737 atomic_inc(&fnic->in_flight); 1738 spin_unlock_irqrestore(host->host_lock, intr_flags); 1739 1740 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 1741 1742 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1743 free_wq_copy_descs(fnic, wq); 1744 1745 if (!vnic_wq_copy_desc_avail(wq)) { 1746 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1747 "queue_dr_io_req failure - no descriptors\n"); 1748 ret = -EAGAIN; 1749 goto lr_io_req_end; 1750 } 1751 1752 /* fill in the lun info */ 1753 int_to_scsilun(sc->device->lun, &fc_lun); 1754 1755 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 1756 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 1757 fc_lun.scsi_lun, io_req->port_id, 1758 fnic->config.ra_tov, fnic->config.ed_tov); 1759 1760 lr_io_req_end: 1761 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 1762 atomic_dec(&fnic->in_flight); 1763 1764 return ret; 1765 } 1766 1767 /* 1768 * Clean up any pending aborts on the lun 1769 * For each outstanding IO on this lun, whose abort is not completed by fw, 1770 * issue a local abort. Wait for abort to complete. Return 0 if all commands 1771 * successfully aborted, 1 otherwise 1772 */ 1773 static int fnic_clean_pending_aborts(struct fnic *fnic, 1774 struct scsi_cmnd *lr_sc) 1775 { 1776 int tag, abt_tag; 1777 struct fnic_io_req *io_req; 1778 spinlock_t *io_lock; 1779 unsigned long flags; 1780 int ret = 0; 1781 struct scsi_cmnd *sc; 1782 struct scsi_lun fc_lun; 1783 struct scsi_device *lun_dev = lr_sc->device; 1784 DECLARE_COMPLETION_ONSTACK(tm_done); 1785 enum fnic_ioreq_state old_ioreq_state; 1786 1787 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) { 1788 sc = scsi_host_find_tag(fnic->lport->host, tag); 1789 /* 1790 * ignore this lun reset cmd or cmds that do not belong to 1791 * this lun 1792 */ 1793 if (!sc || sc == lr_sc || sc->device != lun_dev) 1794 continue; 1795 1796 io_lock = fnic_io_lock_hash(fnic, sc); 1797 spin_lock_irqsave(io_lock, flags); 1798 1799 io_req = (struct fnic_io_req *)CMD_SP(sc); 1800 1801 if (!io_req || sc->device != lun_dev) { 1802 spin_unlock_irqrestore(io_lock, flags); 1803 continue; 1804 } 1805 1806 /* 1807 * Found IO that is still pending with firmware and 1808 * belongs to the LUN that we are resetting 1809 */ 1810 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1811 "Found IO in %s on lun\n", 1812 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1813 1814 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1815 spin_unlock_irqrestore(io_lock, flags); 1816 continue; 1817 } 1818 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1819 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1820 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1821 "%s dev rst not pending sc 0x%p\n", __func__, 1822 sc); 1823 spin_unlock_irqrestore(io_lock, flags); 1824 continue; 1825 } 1826 old_ioreq_state = CMD_STATE(sc); 1827 /* 1828 * Any pending IO issued prior to reset is expected to be 1829 * in abts pending state, if not we need to set 1830 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 1831 * When IO is completed, the IO will be handed over and 1832 * handled in this function. 1833 */ 1834 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1835 1836 if (io_req->abts_done) 1837 shost_printk(KERN_ERR, fnic->lport->host, 1838 "%s: io_req->abts_done is set state is %s\n", 1839 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 1840 1841 BUG_ON(io_req->abts_done); 1842 1843 abt_tag = tag; 1844 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1845 abt_tag |= FNIC_TAG_DEV_RST; 1846 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1847 "%s: dev rst sc 0x%p\n", __func__, sc); 1848 } 1849 1850 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1851 io_req->abts_done = &tm_done; 1852 spin_unlock_irqrestore(io_lock, flags); 1853 1854 /* Now queue the abort command to firmware */ 1855 int_to_scsilun(sc->device->lun, &fc_lun); 1856 1857 if (fnic_queue_abort_io_req(fnic, abt_tag, 1858 FCPIO_ITMF_ABT_TASK_TERM, 1859 fc_lun.scsi_lun, io_req)) { 1860 spin_lock_irqsave(io_lock, flags); 1861 io_req = (struct fnic_io_req *)CMD_SP(sc); 1862 if (io_req) 1863 io_req->abts_done = NULL; 1864 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1865 CMD_STATE(sc) = old_ioreq_state; 1866 spin_unlock_irqrestore(io_lock, flags); 1867 ret = 1; 1868 goto clean_pending_aborts_end; 1869 } else { 1870 spin_lock_irqsave(io_lock, flags); 1871 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1872 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1873 spin_unlock_irqrestore(io_lock, flags); 1874 } 1875 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1876 1877 wait_for_completion_timeout(&tm_done, 1878 msecs_to_jiffies 1879 (fnic->config.ed_tov)); 1880 1881 /* Recheck cmd state to check if it is now aborted */ 1882 spin_lock_irqsave(io_lock, flags); 1883 io_req = (struct fnic_io_req *)CMD_SP(sc); 1884 if (!io_req) { 1885 spin_unlock_irqrestore(io_lock, flags); 1886 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1887 continue; 1888 } 1889 1890 io_req->abts_done = NULL; 1891 1892 /* if abort is still pending with fw, fail */ 1893 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1894 spin_unlock_irqrestore(io_lock, flags); 1895 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1896 ret = 1; 1897 goto clean_pending_aborts_end; 1898 } 1899 CMD_SP(sc) = NULL; 1900 spin_unlock_irqrestore(io_lock, flags); 1901 1902 fnic_release_ioreq_buf(fnic, io_req, sc); 1903 mempool_free(io_req, fnic->io_req_pool); 1904 } 1905 1906 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 1907 1908 /* walk again to check, if IOs are still pending in fw */ 1909 if (fnic_is_abts_pending(fnic, lr_sc)) 1910 ret = FAILED; 1911 1912 clean_pending_aborts_end: 1913 return ret; 1914 } 1915 1916 /** 1917 * fnic_scsi_host_start_tag 1918 * Allocates tagid from host's tag list 1919 **/ 1920 static inline int 1921 fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 1922 { 1923 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 1924 int tag, ret = SCSI_NO_TAG; 1925 1926 BUG_ON(!bqt); 1927 if (!bqt) { 1928 pr_err("Tags are not supported\n"); 1929 goto end; 1930 } 1931 1932 do { 1933 tag = find_next_zero_bit(bqt->tag_map, bqt->max_depth, 1); 1934 if (tag >= bqt->max_depth) { 1935 pr_err("Tag allocation failure\n"); 1936 goto end; 1937 } 1938 } while (test_and_set_bit(tag, bqt->tag_map)); 1939 1940 bqt->tag_index[tag] = sc->request; 1941 sc->request->tag = tag; 1942 sc->tag = tag; 1943 if (!sc->request->special) 1944 sc->request->special = sc; 1945 1946 ret = tag; 1947 1948 end: 1949 return ret; 1950 } 1951 1952 /** 1953 * fnic_scsi_host_end_tag 1954 * frees tag allocated by fnic_scsi_host_start_tag. 1955 **/ 1956 static inline void 1957 fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 1958 { 1959 struct blk_queue_tag *bqt = fnic->lport->host->bqt; 1960 int tag = sc->request->tag; 1961 1962 if (tag == SCSI_NO_TAG) 1963 return; 1964 1965 BUG_ON(!bqt || !bqt->tag_index[tag]); 1966 if (!bqt) 1967 return; 1968 1969 bqt->tag_index[tag] = NULL; 1970 clear_bit(tag, bqt->tag_map); 1971 1972 return; 1973 } 1974 1975 /* 1976 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 1977 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 1978 * on the LUN. 1979 */ 1980 int fnic_device_reset(struct scsi_cmnd *sc) 1981 { 1982 struct fc_lport *lp; 1983 struct fnic *fnic; 1984 struct fnic_io_req *io_req = NULL; 1985 struct fc_rport *rport; 1986 int status; 1987 int ret = FAILED; 1988 spinlock_t *io_lock; 1989 unsigned long flags; 1990 unsigned long start_time = 0; 1991 struct scsi_lun fc_lun; 1992 int tag = 0; 1993 DECLARE_COMPLETION_ONSTACK(tm_done); 1994 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 1995 1996 /* Wait for rport to unblock */ 1997 fc_block_scsi_eh(sc); 1998 1999 /* Get local-port, check ready and link up */ 2000 lp = shost_priv(sc->device->host); 2001 2002 fnic = lport_priv(lp); 2003 2004 rport = starget_to_rport(scsi_target(sc->device)); 2005 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2006 "Device reset called FCID 0x%x, LUN 0x%x sc 0x%p\n", 2007 rport->port_id, sc->device->lun, sc); 2008 2009 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2010 goto fnic_device_reset_end; 2011 2012 /* Check if remote port up */ 2013 if (fc_remote_port_chkready(rport)) 2014 goto fnic_device_reset_end; 2015 2016 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2017 /* Allocate tag if not present */ 2018 2019 tag = sc->request->tag; 2020 if (unlikely(tag < 0)) { 2021 tag = fnic_scsi_host_start_tag(fnic, sc); 2022 if (unlikely(tag == SCSI_NO_TAG)) 2023 goto fnic_device_reset_end; 2024 tag_gen_flag = 1; 2025 } 2026 io_lock = fnic_io_lock_hash(fnic, sc); 2027 spin_lock_irqsave(io_lock, flags); 2028 io_req = (struct fnic_io_req *)CMD_SP(sc); 2029 2030 /* 2031 * If there is a io_req attached to this command, then use it, 2032 * else allocate a new one. 2033 */ 2034 if (!io_req) { 2035 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2036 if (!io_req) { 2037 spin_unlock_irqrestore(io_lock, flags); 2038 goto fnic_device_reset_end; 2039 } 2040 memset(io_req, 0, sizeof(*io_req)); 2041 io_req->port_id = rport->port_id; 2042 CMD_SP(sc) = (char *)io_req; 2043 } 2044 io_req->dr_done = &tm_done; 2045 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2046 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2047 spin_unlock_irqrestore(io_lock, flags); 2048 2049 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2050 2051 /* 2052 * issue the device reset, if enqueue failed, clean up the ioreq 2053 * and break assoc with scsi cmd 2054 */ 2055 if (fnic_queue_dr_io_req(fnic, sc, 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->dr_done = NULL; 2060 goto fnic_device_reset_clean; 2061 } 2062 spin_lock_irqsave(io_lock, flags); 2063 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2064 spin_unlock_irqrestore(io_lock, flags); 2065 2066 /* 2067 * Wait on the local completion for LUN reset. The io_req may be 2068 * freed while we wait since we hold no lock. 2069 */ 2070 wait_for_completion_timeout(&tm_done, 2071 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2072 2073 spin_lock_irqsave(io_lock, flags); 2074 io_req = (struct fnic_io_req *)CMD_SP(sc); 2075 if (!io_req) { 2076 spin_unlock_irqrestore(io_lock, flags); 2077 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2078 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2079 goto fnic_device_reset_end; 2080 } 2081 io_req->dr_done = NULL; 2082 2083 status = CMD_LR_STATUS(sc); 2084 2085 /* 2086 * If lun reset not completed, bail out with failed. io_req 2087 * gets cleaned up during higher levels of EH 2088 */ 2089 if (status == FCPIO_INVALID_CODE) { 2090 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2091 "Device reset timed out\n"); 2092 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2093 spin_unlock_irqrestore(io_lock, flags); 2094 int_to_scsilun(sc->device->lun, &fc_lun); 2095 /* 2096 * Issue abort and terminate on the device reset request. 2097 * If q'ing of the abort fails, retry issue it after a delay. 2098 */ 2099 while (1) { 2100 spin_lock_irqsave(io_lock, flags); 2101 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2102 spin_unlock_irqrestore(io_lock, flags); 2103 break; 2104 } 2105 spin_unlock_irqrestore(io_lock, flags); 2106 if (fnic_queue_abort_io_req(fnic, 2107 tag | FNIC_TAG_DEV_RST, 2108 FCPIO_ITMF_ABT_TASK_TERM, 2109 fc_lun.scsi_lun, io_req)) { 2110 wait_for_completion_timeout(&tm_done, 2111 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2112 } else { 2113 spin_lock_irqsave(io_lock, flags); 2114 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2115 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2116 io_req->abts_done = &tm_done; 2117 spin_unlock_irqrestore(io_lock, flags); 2118 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2119 "Abort and terminate issued on Device reset " 2120 "tag 0x%x sc 0x%p\n", tag, sc); 2121 break; 2122 } 2123 } 2124 while (1) { 2125 spin_lock_irqsave(io_lock, flags); 2126 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2127 spin_unlock_irqrestore(io_lock, flags); 2128 wait_for_completion_timeout(&tm_done, 2129 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2130 break; 2131 } else { 2132 io_req = (struct fnic_io_req *)CMD_SP(sc); 2133 io_req->abts_done = NULL; 2134 goto fnic_device_reset_clean; 2135 } 2136 } 2137 } else { 2138 spin_unlock_irqrestore(io_lock, flags); 2139 } 2140 2141 /* Completed, but not successful, clean up the io_req, return fail */ 2142 if (status != FCPIO_SUCCESS) { 2143 spin_lock_irqsave(io_lock, flags); 2144 FNIC_SCSI_DBG(KERN_DEBUG, 2145 fnic->lport->host, 2146 "Device reset completed - failed\n"); 2147 io_req = (struct fnic_io_req *)CMD_SP(sc); 2148 goto fnic_device_reset_clean; 2149 } 2150 2151 /* 2152 * Clean up any aborts on this lun that have still not 2153 * completed. If any of these fail, then LUN reset fails. 2154 * clean_pending_aborts cleans all cmds on this lun except 2155 * the lun reset cmd. If all cmds get cleaned, the lun reset 2156 * succeeds 2157 */ 2158 if (fnic_clean_pending_aborts(fnic, sc)) { 2159 spin_lock_irqsave(io_lock, flags); 2160 io_req = (struct fnic_io_req *)CMD_SP(sc); 2161 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2162 "Device reset failed" 2163 " since could not abort all IOs\n"); 2164 goto fnic_device_reset_clean; 2165 } 2166 2167 /* Clean lun reset command */ 2168 spin_lock_irqsave(io_lock, flags); 2169 io_req = (struct fnic_io_req *)CMD_SP(sc); 2170 if (io_req) 2171 /* Completed, and successful */ 2172 ret = SUCCESS; 2173 2174 fnic_device_reset_clean: 2175 if (io_req) 2176 CMD_SP(sc) = NULL; 2177 2178 spin_unlock_irqrestore(io_lock, flags); 2179 2180 if (io_req) { 2181 start_time = io_req->start_time; 2182 fnic_release_ioreq_buf(fnic, io_req, sc); 2183 mempool_free(io_req, fnic->io_req_pool); 2184 } 2185 2186 fnic_device_reset_end: 2187 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2188 sc->request->tag, sc, 2189 jiffies_to_msecs(jiffies - start_time), 2190 0, ((u64)sc->cmnd[0] << 32 | 2191 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2192 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2193 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2194 2195 /* free tag if it is allocated */ 2196 if (unlikely(tag_gen_flag)) 2197 fnic_scsi_host_end_tag(fnic, sc); 2198 2199 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2200 "Returning from device reset %s\n", 2201 (ret == SUCCESS) ? 2202 "SUCCESS" : "FAILED"); 2203 return ret; 2204 } 2205 2206 /* Clean up all IOs, clean up libFC local port */ 2207 int fnic_reset(struct Scsi_Host *shost) 2208 { 2209 struct fc_lport *lp; 2210 struct fnic *fnic; 2211 int ret = SUCCESS; 2212 2213 lp = shost_priv(shost); 2214 fnic = lport_priv(lp); 2215 2216 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2217 "fnic_reset called\n"); 2218 2219 /* 2220 * Reset local port, this will clean up libFC exchanges, 2221 * reset remote port sessions, and if link is up, begin flogi 2222 */ 2223 if (lp->tt.lport_reset(lp)) 2224 ret = FAILED; 2225 2226 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2227 "Returning from fnic reset %s\n", 2228 (ret == SUCCESS) ? 2229 "SUCCESS" : "FAILED"); 2230 2231 return ret; 2232 } 2233 2234 /* 2235 * SCSI Error handling calls driver's eh_host_reset if all prior 2236 * error handling levels return FAILED. If host reset completes 2237 * successfully, and if link is up, then Fabric login begins. 2238 * 2239 * Host Reset is the highest level of error recovery. If this fails, then 2240 * host is offlined by SCSI. 2241 * 2242 */ 2243 int fnic_host_reset(struct scsi_cmnd *sc) 2244 { 2245 int ret; 2246 unsigned long wait_host_tmo; 2247 struct Scsi_Host *shost = sc->device->host; 2248 struct fc_lport *lp = shost_priv(shost); 2249 2250 /* 2251 * If fnic_reset is successful, wait for fabric login to complete 2252 * scsi-ml tries to send a TUR to every device if host reset is 2253 * successful, so before returning to scsi, fabric should be up 2254 */ 2255 ret = fnic_reset(shost); 2256 if (ret == SUCCESS) { 2257 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2258 ret = FAILED; 2259 while (time_before(jiffies, wait_host_tmo)) { 2260 if ((lp->state == LPORT_ST_READY) && 2261 (lp->link_up)) { 2262 ret = SUCCESS; 2263 break; 2264 } 2265 ssleep(1); 2266 } 2267 } 2268 2269 return ret; 2270 } 2271 2272 /* 2273 * This fxn is called from libFC when host is removed 2274 */ 2275 void fnic_scsi_abort_io(struct fc_lport *lp) 2276 { 2277 int err = 0; 2278 unsigned long flags; 2279 enum fnic_state old_state; 2280 struct fnic *fnic = lport_priv(lp); 2281 DECLARE_COMPLETION_ONSTACK(remove_wait); 2282 2283 /* Issue firmware reset for fnic, wait for reset to complete */ 2284 retry_fw_reset: 2285 spin_lock_irqsave(&fnic->fnic_lock, flags); 2286 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2287 /* fw reset is in progress, poll for its completion */ 2288 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2289 schedule_timeout(msecs_to_jiffies(100)); 2290 goto retry_fw_reset; 2291 } 2292 2293 fnic->remove_wait = &remove_wait; 2294 old_state = fnic->state; 2295 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2296 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2297 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2298 2299 err = fnic_fw_reset_handler(fnic); 2300 if (err) { 2301 spin_lock_irqsave(&fnic->fnic_lock, flags); 2302 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2303 fnic->state = old_state; 2304 fnic->remove_wait = NULL; 2305 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2306 return; 2307 } 2308 2309 /* Wait for firmware reset to complete */ 2310 wait_for_completion_timeout(&remove_wait, 2311 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2312 2313 spin_lock_irqsave(&fnic->fnic_lock, flags); 2314 fnic->remove_wait = NULL; 2315 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2316 "fnic_scsi_abort_io %s\n", 2317 (fnic->state == FNIC_IN_ETH_MODE) ? 2318 "SUCCESS" : "FAILED"); 2319 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2320 2321 } 2322 2323 /* 2324 * This fxn called from libFC to clean up driver IO state on link down 2325 */ 2326 void fnic_scsi_cleanup(struct fc_lport *lp) 2327 { 2328 unsigned long flags; 2329 enum fnic_state old_state; 2330 struct fnic *fnic = lport_priv(lp); 2331 2332 /* issue fw reset */ 2333 retry_fw_reset: 2334 spin_lock_irqsave(&fnic->fnic_lock, flags); 2335 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2336 /* fw reset is in progress, poll for its completion */ 2337 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2338 schedule_timeout(msecs_to_jiffies(100)); 2339 goto retry_fw_reset; 2340 } 2341 old_state = fnic->state; 2342 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2343 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2344 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2345 2346 if (fnic_fw_reset_handler(fnic)) { 2347 spin_lock_irqsave(&fnic->fnic_lock, flags); 2348 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2349 fnic->state = old_state; 2350 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2351 } 2352 2353 } 2354 2355 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2356 { 2357 } 2358 2359 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2360 { 2361 struct fnic *fnic = lport_priv(lp); 2362 2363 /* Non-zero sid, nothing to do */ 2364 if (sid) 2365 goto call_fc_exch_mgr_reset; 2366 2367 if (did) { 2368 fnic_rport_exch_reset(fnic, did); 2369 goto call_fc_exch_mgr_reset; 2370 } 2371 2372 /* 2373 * sid = 0, did = 0 2374 * link down or device being removed 2375 */ 2376 if (!fnic->in_remove) 2377 fnic_scsi_cleanup(lp); 2378 else 2379 fnic_scsi_abort_io(lp); 2380 2381 /* call libFC exch mgr reset to reset its exchanges */ 2382 call_fc_exch_mgr_reset: 2383 fc_exch_mgr_reset(lp, sid, did); 2384 2385 } 2386 2387 /* 2388 * fnic_is_abts_pending() is a helper function that 2389 * walks through tag map to check if there is any IOs pending,if there is one, 2390 * then it returns 1 (true), otherwise 0 (false) 2391 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2392 * otherwise, it checks for all IOs. 2393 */ 2394 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2395 { 2396 int tag; 2397 struct fnic_io_req *io_req; 2398 spinlock_t *io_lock; 2399 unsigned long flags; 2400 int ret = 0; 2401 struct scsi_cmnd *sc; 2402 struct scsi_device *lun_dev = NULL; 2403 2404 if (lr_sc) 2405 lun_dev = lr_sc->device; 2406 2407 /* walk again to check, if IOs are still pending in fw */ 2408 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) { 2409 sc = scsi_host_find_tag(fnic->lport->host, tag); 2410 /* 2411 * ignore this lun reset cmd or cmds that do not belong to 2412 * this lun 2413 */ 2414 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) 2415 continue; 2416 2417 io_lock = fnic_io_lock_hash(fnic, sc); 2418 spin_lock_irqsave(io_lock, flags); 2419 2420 io_req = (struct fnic_io_req *)CMD_SP(sc); 2421 2422 if (!io_req || sc->device != lun_dev) { 2423 spin_unlock_irqrestore(io_lock, flags); 2424 continue; 2425 } 2426 2427 /* 2428 * Found IO that is still pending with firmware and 2429 * belongs to the LUN that we are resetting 2430 */ 2431 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2432 "Found IO in %s on lun\n", 2433 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2434 2435 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2436 spin_unlock_irqrestore(io_lock, flags); 2437 ret = 1; 2438 continue; 2439 } 2440 } 2441 2442 return ret; 2443 } 2444