1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 4 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 5 */ 6 #include <linux/mempool.h> 7 #include <linux/errno.h> 8 #include <linux/init.h> 9 #include <linux/workqueue.h> 10 #include <linux/pci.h> 11 #include <linux/scatterlist.h> 12 #include <linux/skbuff.h> 13 #include <linux/spinlock.h> 14 #include <linux/etherdevice.h> 15 #include <linux/if_ether.h> 16 #include <linux/if_vlan.h> 17 #include <linux/delay.h> 18 #include <linux/gfp.h> 19 #include <scsi/scsi.h> 20 #include <scsi/scsi_host.h> 21 #include <scsi/scsi_device.h> 22 #include <scsi/scsi_cmnd.h> 23 #include <scsi/scsi_tcq.h> 24 #include <scsi/fc/fc_els.h> 25 #include <scsi/fc/fc_fcoe.h> 26 #include <scsi/libfc.h> 27 #include <scsi/fc_frame.h> 28 #include "fnic_io.h" 29 #include "fnic.h" 30 31 const char *fnic_state_str[] = { 32 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE", 33 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE", 34 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE", 35 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE", 36 }; 37 38 static const char *fnic_ioreq_state_str[] = { 39 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED", 40 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING", 41 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING", 42 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE", 43 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE", 44 }; 45 46 static const char *fcpio_status_str[] = { 47 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/ 48 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER", 49 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE", 50 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]", 51 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED", 52 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND", 53 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/ 54 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT", 55 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID", 56 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID", 57 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH", 58 [FCPIO_FW_ERR] = "FCPIO_FW_ERR", 59 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED", 60 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED", 61 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN", 62 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED", 63 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL", 64 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED", 65 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", 66 }; 67 68 const char *fnic_state_to_str(unsigned int state) 69 { 70 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) 71 return "unknown"; 72 73 return fnic_state_str[state]; 74 } 75 76 static const char *fnic_ioreq_state_to_str(unsigned int state) 77 { 78 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) || 79 !fnic_ioreq_state_str[state]) 80 return "unknown"; 81 82 return fnic_ioreq_state_str[state]; 83 } 84 85 static const char *fnic_fcpio_status_to_str(unsigned int status) 86 { 87 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status]) 88 return "unknown"; 89 90 return fcpio_status_str[status]; 91 } 92 93 static void fnic_cleanup_io(struct fnic *fnic); 94 95 /* 96 * Unmap the data buffer and sense buffer for an io_req, 97 * also unmap and free the device-private scatter/gather list. 98 */ 99 static void fnic_release_ioreq_buf(struct fnic *fnic, 100 struct fnic_io_req *io_req, 101 struct scsi_cmnd *sc) 102 { 103 if (io_req->sgl_list_pa) 104 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 105 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, 106 DMA_TO_DEVICE); 107 scsi_dma_unmap(sc); 108 109 if (io_req->sgl_cnt) 110 mempool_free(io_req->sgl_list_alloc, 111 fnic->io_sgl_pool[io_req->sgl_type]); 112 if (io_req->sense_buf_pa) 113 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa, 114 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); 115 } 116 117 /* Free up Copy Wq descriptors. Called with copy_wq lock held */ 118 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq, unsigned int hwq) 119 { 120 /* if no Ack received from firmware, then nothing to clean */ 121 if (!fnic->fw_ack_recd[hwq]) 122 return 1; 123 124 /* 125 * Update desc_available count based on number of freed descriptors 126 * Account for wraparound 127 */ 128 if (wq->to_clean_index <= fnic->fw_ack_index[hwq]) 129 wq->ring.desc_avail += (fnic->fw_ack_index[hwq] 130 - wq->to_clean_index + 1); 131 else 132 wq->ring.desc_avail += (wq->ring.desc_count 133 - wq->to_clean_index 134 + fnic->fw_ack_index[hwq] + 1); 135 136 /* 137 * just bump clean index to ack_index+1 accounting for wraparound 138 * this will essentially free up all descriptors between 139 * to_clean_index and fw_ack_index, both inclusive 140 */ 141 wq->to_clean_index = 142 (fnic->fw_ack_index[hwq] + 1) % wq->ring.desc_count; 143 144 /* we have processed the acks received so far */ 145 fnic->fw_ack_recd[hwq] = 0; 146 return 0; 147 } 148 149 150 /* 151 * __fnic_set_state_flags 152 * Sets/Clears bits in fnic's state_flags 153 **/ 154 void 155 __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags, 156 unsigned long clearbits) 157 { 158 unsigned long flags = 0; 159 160 spin_lock_irqsave(&fnic->fnic_lock, flags); 161 162 if (clearbits) 163 fnic->state_flags &= ~st_flags; 164 else 165 fnic->state_flags |= st_flags; 166 167 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 168 169 return; 170 } 171 172 173 /* 174 * fnic_fw_reset_handler 175 * Routine to send reset msg to fw 176 */ 177 int fnic_fw_reset_handler(struct fnic *fnic) 178 { 179 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0]; 180 int ret = 0; 181 unsigned long flags; 182 183 /* indicate fwreset to io path */ 184 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); 185 186 skb_queue_purge(&fnic->frame_queue); 187 skb_queue_purge(&fnic->tx_queue); 188 189 /* wait for io cmpl */ 190 while (atomic_read(&fnic->in_flight)) 191 schedule_timeout(msecs_to_jiffies(1)); 192 193 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 194 195 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 196 free_wq_copy_descs(fnic, wq, 0); 197 198 if (!vnic_wq_copy_desc_avail(wq)) 199 ret = -EAGAIN; 200 else { 201 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); 202 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 203 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 204 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 205 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 206 atomic64_read( 207 &fnic->fnic_stats.fw_stats.active_fw_reqs)); 208 } 209 210 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 211 212 if (!ret) { 213 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets); 214 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 215 "Issued fw reset\n"); 216 } else { 217 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 218 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 219 "Failed to issue fw reset\n"); 220 } 221 222 return ret; 223 } 224 225 226 /* 227 * fnic_flogi_reg_handler 228 * Routine to send flogi register msg to fw 229 */ 230 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) 231 { 232 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0]; 233 enum fcpio_flogi_reg_format_type format; 234 struct fc_lport *lp = fnic->lport; 235 u8 gw_mac[ETH_ALEN]; 236 int ret = 0; 237 unsigned long flags; 238 239 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 240 241 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 242 free_wq_copy_descs(fnic, wq, 0); 243 244 if (!vnic_wq_copy_desc_avail(wq)) { 245 ret = -EAGAIN; 246 goto flogi_reg_ioreq_end; 247 } 248 249 if (fnic->ctlr.map_dest) { 250 eth_broadcast_addr(gw_mac); 251 format = FCPIO_FLOGI_REG_DEF_DEST; 252 } else { 253 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); 254 format = FCPIO_FLOGI_REG_GW_DEST; 255 } 256 257 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { 258 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, 259 fc_id, gw_mac, 260 fnic->data_src_addr, 261 lp->r_a_tov, lp->e_d_tov); 262 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 263 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", 264 fc_id, fnic->data_src_addr, gw_mac); 265 } else { 266 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, 267 format, fc_id, gw_mac); 268 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 269 "FLOGI reg issued fcid 0x%x map %d dest 0x%p\n", 270 fc_id, fnic->ctlr.map_dest, gw_mac); 271 } 272 273 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 274 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 275 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 276 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 277 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 278 279 flogi_reg_ioreq_end: 280 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 281 return ret; 282 } 283 284 /* 285 * fnic_queue_wq_copy_desc 286 * Routine to enqueue a wq copy desc 287 */ 288 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, 289 struct vnic_wq_copy *wq, 290 struct fnic_io_req *io_req, 291 struct scsi_cmnd *sc, 292 int sg_count, 293 uint32_t mqtag, 294 uint16_t hwq) 295 { 296 struct scatterlist *sg; 297 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); 298 struct fc_rport_libfc_priv *rp = rport->dd_data; 299 struct host_sg_desc *desc; 300 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 301 unsigned int i; 302 int flags; 303 u8 exch_flags; 304 struct scsi_lun fc_lun; 305 306 if (sg_count) { 307 /* For each SGE, create a device desc entry */ 308 desc = io_req->sgl_list; 309 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 310 desc->addr = cpu_to_le64(sg_dma_address(sg)); 311 desc->len = cpu_to_le32(sg_dma_len(sg)); 312 desc->_resvd = 0; 313 desc++; 314 } 315 316 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev, 317 io_req->sgl_list, 318 sizeof(io_req->sgl_list[0]) * sg_count, 319 DMA_TO_DEVICE); 320 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) { 321 printk(KERN_ERR "DMA mapping failed\n"); 322 return SCSI_MLQUEUE_HOST_BUSY; 323 } 324 } 325 326 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev, 327 sc->sense_buffer, 328 SCSI_SENSE_BUFFERSIZE, 329 DMA_FROM_DEVICE); 330 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) { 331 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 332 sizeof(io_req->sgl_list[0]) * sg_count, 333 DMA_TO_DEVICE); 334 printk(KERN_ERR "DMA mapping failed\n"); 335 return SCSI_MLQUEUE_HOST_BUSY; 336 } 337 338 int_to_scsilun(sc->device->lun, &fc_lun); 339 340 /* Enqueue the descriptor in the Copy WQ */ 341 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq]) 342 free_wq_copy_descs(fnic, wq, hwq); 343 344 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 345 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 346 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 347 atomic64_inc(&misc_stats->io_cpwq_alloc_failures); 348 return SCSI_MLQUEUE_HOST_BUSY; 349 } 350 351 flags = 0; 352 if (sc->sc_data_direction == DMA_FROM_DEVICE) 353 flags = FCPIO_ICMND_RDDATA; 354 else if (sc->sc_data_direction == DMA_TO_DEVICE) 355 flags = FCPIO_ICMND_WRDATA; 356 357 exch_flags = 0; 358 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 359 (rp->flags & FC_RP_FLAGS_RETRY)) 360 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 361 362 fnic_queue_wq_copy_desc_icmnd_16(wq, mqtag, 363 0, exch_flags, io_req->sgl_cnt, 364 SCSI_SENSE_BUFFERSIZE, 365 io_req->sgl_list_pa, 366 io_req->sense_buf_pa, 367 0, /* scsi cmd ref, always 0 */ 368 FCPIO_ICMND_PTA_SIMPLE, 369 /* scsi pri and tag */ 370 flags, /* command flags */ 371 sc->cmnd, sc->cmd_len, 372 scsi_bufflen(sc), 373 fc_lun.scsi_lun, io_req->port_id, 374 rport->maxframe_size, rp->r_a_tov, 375 rp->e_d_tov); 376 377 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 378 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 379 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 380 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 381 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 382 383 return 0; 384 } 385 386 int fnic_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc) 387 { 388 struct request *const rq = scsi_cmd_to_rq(sc); 389 uint32_t mqtag = 0; 390 void (*done)(struct scsi_cmnd *) = scsi_done; 391 struct fc_lport *lp = shost_priv(sc->device->host); 392 struct fc_rport *rport; 393 struct fnic_io_req *io_req = NULL; 394 struct fnic *fnic = lport_priv(lp); 395 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 396 struct vnic_wq_copy *wq; 397 int ret = 1; 398 u64 cmd_trace; 399 int sg_count = 0; 400 unsigned long flags = 0; 401 unsigned long ptr; 402 int io_lock_acquired = 0; 403 struct fc_rport_libfc_priv *rp; 404 uint16_t hwq = 0; 405 406 mqtag = blk_mq_unique_tag(rq); 407 spin_lock_irqsave(&fnic->fnic_lock, flags); 408 409 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) { 410 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 411 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 412 "fnic IO blocked flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n", 413 fnic->state_flags); 414 return SCSI_MLQUEUE_HOST_BUSY; 415 } 416 417 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) { 418 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 419 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 420 "fnic flags: 0x%lx. Returning SCSI_MLQUEUE_HOST_BUSY\n", 421 fnic->state_flags); 422 return SCSI_MLQUEUE_HOST_BUSY; 423 } 424 425 rport = starget_to_rport(scsi_target(sc->device)); 426 if (!rport) { 427 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 428 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 429 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 430 sc->result = DID_NO_CONNECT << 16; 431 done(sc); 432 return 0; 433 } 434 435 ret = fc_remote_port_chkready(rport); 436 if (ret) { 437 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 439 "rport is not ready\n"); 440 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 441 sc->result = ret; 442 done(sc); 443 return 0; 444 } 445 446 rp = rport->dd_data; 447 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 448 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 449 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 450 "rport 0x%x removed, returning DID_NO_CONNECT\n", 451 rport->port_id); 452 453 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 454 sc->result = DID_NO_CONNECT<<16; 455 done(sc); 456 return 0; 457 } 458 459 if (rp->rp_state != RPORT_ST_READY) { 460 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 461 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 462 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 463 rport->port_id, rp->rp_state); 464 465 sc->result = DID_IMM_RETRY << 16; 466 done(sc); 467 return 0; 468 } 469 470 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 471 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 472 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 473 "state not ready: %d/link not up: %d Returning HOST_BUSY\n", 474 lp->state, lp->link_up); 475 return SCSI_MLQUEUE_HOST_BUSY; 476 } 477 478 atomic_inc(&fnic->in_flight); 479 480 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 481 fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED; 482 fnic_priv(sc)->flags = FNIC_NO_FLAGS; 483 484 /* Get a new io_req for this SCSI IO */ 485 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 486 if (!io_req) { 487 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 488 ret = SCSI_MLQUEUE_HOST_BUSY; 489 goto out; 490 } 491 memset(io_req, 0, sizeof(*io_req)); 492 493 /* Map the data buffer */ 494 sg_count = scsi_dma_map(sc); 495 if (sg_count < 0) { 496 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 497 mqtag, sc, 0, sc->cmnd[0], sg_count, fnic_priv(sc)->state); 498 mempool_free(io_req, fnic->io_req_pool); 499 goto out; 500 } 501 502 /* Determine the type of scatter/gather list we need */ 503 io_req->sgl_cnt = sg_count; 504 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 505 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 506 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 507 508 if (sg_count) { 509 io_req->sgl_list = 510 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 511 GFP_ATOMIC); 512 if (!io_req->sgl_list) { 513 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 514 ret = SCSI_MLQUEUE_HOST_BUSY; 515 scsi_dma_unmap(sc); 516 mempool_free(io_req, fnic->io_req_pool); 517 goto out; 518 } 519 520 /* Cache sgl list allocated address before alignment */ 521 io_req->sgl_list_alloc = io_req->sgl_list; 522 ptr = (unsigned long) io_req->sgl_list; 523 if (ptr % FNIC_SG_DESC_ALIGN) { 524 io_req->sgl_list = (struct host_sg_desc *) 525 (((unsigned long) ptr 526 + FNIC_SG_DESC_ALIGN - 1) 527 & ~(FNIC_SG_DESC_ALIGN - 1)); 528 } 529 } 530 531 /* 532 * Will acquire lock before setting to IO initialized. 533 */ 534 hwq = blk_mq_unique_tag_to_hwq(mqtag); 535 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 536 537 /* initialize rest of io_req */ 538 io_lock_acquired = 1; 539 io_req->port_id = rport->port_id; 540 io_req->start_time = jiffies; 541 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING; 542 fnic_priv(sc)->io_req = io_req; 543 fnic_priv(sc)->flags |= FNIC_IO_INITIALIZED; 544 io_req->sc = sc; 545 546 if (fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] != NULL) { 547 WARN(1, "fnic<%d>: %s: hwq: %d tag 0x%x already exists\n", 548 fnic->fnic_num, __func__, hwq, blk_mq_unique_tag_to_tag(mqtag)); 549 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 550 return SCSI_MLQUEUE_HOST_BUSY; 551 } 552 553 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = io_req; 554 io_req->tag = mqtag; 555 556 /* create copy wq desc and enqueue it */ 557 wq = &fnic->hw_copy_wq[hwq]; 558 atomic64_inc(&fnic_stats->io_stats.ios[hwq]); 559 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count, mqtag, hwq); 560 if (ret) { 561 /* 562 * In case another thread cancelled the request, 563 * refetch the pointer under the lock. 564 */ 565 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 566 mqtag, sc, 0, 0, 0, fnic_flags_and_state(sc)); 567 io_req = fnic_priv(sc)->io_req; 568 fnic_priv(sc)->io_req = NULL; 569 if (io_req) 570 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = NULL; 571 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 572 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 573 if (io_req) { 574 fnic_release_ioreq_buf(fnic, io_req, sc); 575 mempool_free(io_req, fnic->io_req_pool); 576 } 577 atomic_dec(&fnic->in_flight); 578 return ret; 579 } else { 580 atomic64_inc(&fnic_stats->io_stats.active_ios); 581 atomic64_inc(&fnic_stats->io_stats.num_ios); 582 if (atomic64_read(&fnic_stats->io_stats.active_ios) > 583 atomic64_read(&fnic_stats->io_stats.max_active_ios)) 584 atomic64_set(&fnic_stats->io_stats.max_active_ios, 585 atomic64_read(&fnic_stats->io_stats.active_ios)); 586 587 /* REVISIT: Use per IO lock in the final code */ 588 fnic_priv(sc)->flags |= FNIC_IO_ISSUED; 589 } 590 out: 591 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 592 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 593 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 594 sc->cmnd[5]); 595 596 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 597 mqtag, sc, io_req, sg_count, cmd_trace, 598 fnic_flags_and_state(sc)); 599 600 /* if only we issued IO, will we have the io lock */ 601 if (io_lock_acquired) 602 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 603 604 atomic_dec(&fnic->in_flight); 605 return ret; 606 } 607 608 609 /* 610 * fnic_fcpio_fw_reset_cmpl_handler 611 * Routine to handle fw reset completion 612 */ 613 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 614 struct fcpio_fw_req *desc) 615 { 616 u8 type; 617 u8 hdr_status; 618 struct fcpio_tag tag; 619 int ret = 0; 620 unsigned long flags; 621 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 622 623 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 624 625 atomic64_inc(&reset_stats->fw_reset_completions); 626 627 /* Clean up all outstanding io requests */ 628 fnic_cleanup_io(fnic); 629 630 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 631 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 632 atomic64_set(&fnic->io_cmpl_skip, 0); 633 634 spin_lock_irqsave(&fnic->fnic_lock, flags); 635 636 /* fnic should be in FC_TRANS_ETH_MODE */ 637 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 638 /* Check status of reset completion */ 639 if (!hdr_status) { 640 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 641 "reset cmpl success\n"); 642 /* Ready to send flogi out */ 643 fnic->state = FNIC_IN_ETH_MODE; 644 } else { 645 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 646 "reset failed with header status: %s\n", 647 fnic_fcpio_status_to_str(hdr_status)); 648 649 /* 650 * Unable to change to eth mode, cannot send out flogi 651 * Change state to fc mode, so that subsequent Flogi 652 * requests from libFC will cause more attempts to 653 * reset the firmware. Free the cached flogi 654 */ 655 fnic->state = FNIC_IN_FC_MODE; 656 atomic64_inc(&reset_stats->fw_reset_failures); 657 ret = -1; 658 } 659 } else { 660 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 661 "Unexpected state while processing reset completion: %s\n", 662 fnic_state_to_str(fnic->state)); 663 atomic64_inc(&reset_stats->fw_reset_failures); 664 ret = -1; 665 } 666 667 /* Thread removing device blocks till firmware reset is complete */ 668 if (fnic->remove_wait) 669 complete(fnic->remove_wait); 670 671 /* 672 * If fnic is being removed, or fw reset failed 673 * free the flogi frame. Else, send it out 674 */ 675 if (fnic->remove_wait || ret) { 676 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 677 skb_queue_purge(&fnic->tx_queue); 678 goto reset_cmpl_handler_end; 679 } 680 681 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 682 683 queue_work(fnic_event_queue, &fnic->flush_work); 684 685 reset_cmpl_handler_end: 686 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 687 688 return ret; 689 } 690 691 /* 692 * fnic_fcpio_flogi_reg_cmpl_handler 693 * Routine to handle flogi register completion 694 */ 695 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 696 struct fcpio_fw_req *desc) 697 { 698 u8 type; 699 u8 hdr_status; 700 struct fcpio_tag tag; 701 int ret = 0; 702 unsigned long flags; 703 704 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 705 706 /* Update fnic state based on status of flogi reg completion */ 707 spin_lock_irqsave(&fnic->fnic_lock, flags); 708 709 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 710 711 /* Check flogi registration completion status */ 712 if (!hdr_status) { 713 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 714 "flog reg succeeded\n"); 715 fnic->state = FNIC_IN_FC_MODE; 716 } else { 717 FNIC_SCSI_DBG(KERN_DEBUG, 718 fnic->lport->host, fnic->fnic_num, 719 "fnic flogi reg :failed %s\n", 720 fnic_fcpio_status_to_str(hdr_status)); 721 fnic->state = FNIC_IN_ETH_MODE; 722 ret = -1; 723 } 724 } else { 725 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 726 "Unexpected fnic state %s while" 727 " processing flogi reg completion\n", 728 fnic_state_to_str(fnic->state)); 729 ret = -1; 730 } 731 732 if (!ret) { 733 if (fnic->stop_rx_link_events) { 734 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 735 goto reg_cmpl_handler_end; 736 } 737 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 738 739 queue_work(fnic_event_queue, &fnic->flush_work); 740 queue_work(fnic_event_queue, &fnic->frame_work); 741 } else { 742 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 743 } 744 745 reg_cmpl_handler_end: 746 return ret; 747 } 748 749 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 750 u16 request_out) 751 { 752 if (wq->to_clean_index <= wq->to_use_index) { 753 /* out of range, stale request_out index */ 754 if (request_out < wq->to_clean_index || 755 request_out >= wq->to_use_index) 756 return 0; 757 } else { 758 /* out of range, stale request_out index */ 759 if (request_out < wq->to_clean_index && 760 request_out >= wq->to_use_index) 761 return 0; 762 } 763 /* request_out index is in range */ 764 return 1; 765 } 766 767 768 /* 769 * Mark that ack received and store the Ack index. If there are multiple 770 * acks received before Tx thread cleans it up, the latest value will be 771 * used which is correct behavior. This state should be in the copy Wq 772 * instead of in the fnic 773 */ 774 static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 775 unsigned int cq_index, 776 struct fcpio_fw_req *desc) 777 { 778 struct vnic_wq_copy *wq; 779 u16 request_out = desc->u.ack.request_out; 780 unsigned long flags; 781 u64 *ox_id_tag = (u64 *)(void *)desc; 782 unsigned int wq_index = cq_index; 783 784 /* mark the ack state */ 785 wq = &fnic->hw_copy_wq[cq_index]; 786 spin_lock_irqsave(&fnic->wq_copy_lock[wq_index], flags); 787 788 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 789 if (is_ack_index_in_range(wq, request_out)) { 790 fnic->fw_ack_index[wq_index] = request_out; 791 fnic->fw_ack_recd[wq_index] = 1; 792 } else 793 atomic64_inc( 794 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 795 796 spin_unlock_irqrestore(&fnic->wq_copy_lock[wq_index], flags); 797 FNIC_TRACE(fnic_fcpio_ack_handler, 798 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 799 ox_id_tag[4], ox_id_tag[5]); 800 } 801 802 /* 803 * fnic_fcpio_icmnd_cmpl_handler 804 * Routine to handle icmnd completions 805 */ 806 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, unsigned int cq_index, 807 struct fcpio_fw_req *desc) 808 { 809 u8 type; 810 u8 hdr_status; 811 struct fcpio_tag ftag; 812 u32 id; 813 u64 xfer_len = 0; 814 struct fcpio_icmnd_cmpl *icmnd_cmpl; 815 struct fnic_io_req *io_req; 816 struct scsi_cmnd *sc; 817 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 818 unsigned long flags; 819 u64 cmd_trace; 820 unsigned long start_time; 821 unsigned long io_duration_time; 822 unsigned int hwq = 0; 823 unsigned int mqtag = 0; 824 unsigned int tag = 0; 825 826 /* Decode the cmpl description to get the io_req id */ 827 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &ftag); 828 fcpio_tag_id_dec(&ftag, &id); 829 icmnd_cmpl = &desc->u.icmnd_cmpl; 830 831 mqtag = id; 832 tag = blk_mq_unique_tag_to_tag(mqtag); 833 hwq = blk_mq_unique_tag_to_hwq(mqtag); 834 835 if (hwq != cq_index) { 836 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 837 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ", 838 hwq, mqtag, tag, cq_index); 839 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 840 "hdr status: %s icmnd completion on the wrong queue\n", 841 fnic_fcpio_status_to_str(hdr_status)); 842 } 843 844 if (tag >= fnic->fnic_max_tag_id) { 845 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 846 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ", 847 hwq, mqtag, tag, cq_index); 848 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 849 "hdr status: %s Out of range tag\n", 850 fnic_fcpio_status_to_str(hdr_status)); 851 return; 852 } 853 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 854 855 sc = scsi_host_find_tag(fnic->lport->host, id); 856 WARN_ON_ONCE(!sc); 857 if (!sc) { 858 atomic64_inc(&fnic_stats->io_stats.sc_null); 859 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 860 shost_printk(KERN_ERR, fnic->lport->host, 861 "icmnd_cmpl sc is null - " 862 "hdr status = %s tag = 0x%x desc = 0x%p\n", 863 fnic_fcpio_status_to_str(hdr_status), id, desc); 864 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 865 fnic->lport->host->host_no, id, 866 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 867 (u64)icmnd_cmpl->_resvd0[0]), 868 ((u64)hdr_status << 16 | 869 (u64)icmnd_cmpl->scsi_status << 8 | 870 (u64)icmnd_cmpl->flags), desc, 871 (u64)icmnd_cmpl->residual, 0); 872 return; 873 } 874 875 io_req = fnic_priv(sc)->io_req; 876 if (fnic->sw_copy_wq[hwq].io_req_table[tag] != io_req) { 877 WARN(1, "%s: %d: hwq: %d mqtag: 0x%x tag: 0x%x io_req tag mismatch\n", 878 __func__, __LINE__, hwq, mqtag, tag); 879 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 880 return; 881 } 882 883 WARN_ON_ONCE(!io_req); 884 if (!io_req) { 885 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 886 fnic_priv(sc)->flags |= FNIC_IO_REQ_NULL; 887 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 888 shost_printk(KERN_ERR, fnic->lport->host, 889 "icmnd_cmpl io_req is null - " 890 "hdr status = %s tag = 0x%x sc 0x%p\n", 891 fnic_fcpio_status_to_str(hdr_status), id, sc); 892 return; 893 } 894 start_time = io_req->start_time; 895 896 /* firmware completed the io */ 897 io_req->io_completed = 1; 898 899 /* 900 * if SCSI-ML has already issued abort on this command, 901 * set completion of the IO. The abts path will clean it up 902 */ 903 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 904 905 /* 906 * set the FNIC_IO_DONE so that this doesn't get 907 * flagged as 'out of order' if it was not aborted 908 */ 909 fnic_priv(sc)->flags |= FNIC_IO_DONE; 910 fnic_priv(sc)->flags |= FNIC_IO_ABTS_PENDING; 911 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 912 if(FCPIO_ABORTED == hdr_status) 913 fnic_priv(sc)->flags |= FNIC_IO_ABORTED; 914 915 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 916 "icmnd_cmpl abts pending " 917 "hdr status = %s tag = 0x%x sc = 0x%p " 918 "scsi_status = %x residual = %d\n", 919 fnic_fcpio_status_to_str(hdr_status), 920 id, sc, 921 icmnd_cmpl->scsi_status, 922 icmnd_cmpl->residual); 923 return; 924 } 925 926 /* Mark the IO as complete */ 927 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 928 929 icmnd_cmpl = &desc->u.icmnd_cmpl; 930 931 switch (hdr_status) { 932 case FCPIO_SUCCESS: 933 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 934 xfer_len = scsi_bufflen(sc); 935 936 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) { 937 xfer_len -= icmnd_cmpl->residual; 938 scsi_set_resid(sc, icmnd_cmpl->residual); 939 } 940 941 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) 942 atomic64_inc(&fnic_stats->misc_stats.check_condition); 943 944 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 945 atomic64_inc(&fnic_stats->misc_stats.queue_fulls); 946 break; 947 948 case FCPIO_TIMEOUT: /* request was timed out */ 949 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); 950 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 951 break; 952 953 case FCPIO_ABORTED: /* request was aborted */ 954 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); 955 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 956 break; 957 958 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 959 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); 960 scsi_set_resid(sc, icmnd_cmpl->residual); 961 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 962 break; 963 964 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 965 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); 966 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 967 break; 968 969 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 970 atomic64_inc(&fnic_stats->io_stats.io_not_found); 971 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 972 break; 973 974 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 975 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); 976 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 977 break; 978 979 case FCPIO_FW_ERR: /* request was terminated due fw error */ 980 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); 981 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 982 break; 983 984 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 985 atomic64_inc(&fnic_stats->misc_stats.mss_invalid); 986 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 987 break; 988 989 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 990 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 991 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 992 default: 993 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 994 break; 995 } 996 997 /* Break link with the SCSI command */ 998 fnic_priv(sc)->io_req = NULL; 999 io_req->sc = NULL; 1000 fnic_priv(sc)->flags |= FNIC_IO_DONE; 1001 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL; 1002 1003 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1004 1005 if (hdr_status != FCPIO_SUCCESS) { 1006 atomic64_inc(&fnic_stats->io_stats.io_failures); 1007 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 1008 fnic_fcpio_status_to_str(hdr_status)); 1009 } 1010 1011 fnic_release_ioreq_buf(fnic, io_req, sc); 1012 1013 cmd_trace = ((u64)hdr_status << 56) | 1014 (u64)icmnd_cmpl->scsi_status << 48 | 1015 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 1016 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1017 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 1018 1019 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 1020 sc->device->host->host_no, id, sc, 1021 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1022 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1023 jiffies_to_msecs(jiffies - start_time)), 1024 desc, cmd_trace, fnic_flags_and_state(sc)); 1025 1026 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1027 fnic->lport->host_stats.fcp_input_requests++; 1028 fnic->fcp_input_bytes += xfer_len; 1029 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1030 fnic->lport->host_stats.fcp_output_requests++; 1031 fnic->fcp_output_bytes += xfer_len; 1032 } else 1033 fnic->lport->host_stats.fcp_control_requests++; 1034 1035 /* Call SCSI completion function to complete the IO */ 1036 scsi_done(sc); 1037 1038 mempool_free(io_req, fnic->io_req_pool); 1039 1040 atomic64_dec(&fnic_stats->io_stats.active_ios); 1041 if (atomic64_read(&fnic->io_cmpl_skip)) 1042 atomic64_dec(&fnic->io_cmpl_skip); 1043 else 1044 atomic64_inc(&fnic_stats->io_stats.io_completions); 1045 1046 1047 io_duration_time = jiffies_to_msecs(jiffies) - 1048 jiffies_to_msecs(start_time); 1049 1050 if(io_duration_time <= 10) 1051 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1052 else if(io_duration_time <= 100) 1053 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1054 else if(io_duration_time <= 500) 1055 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1056 else if(io_duration_time <= 5000) 1057 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1058 else if(io_duration_time <= 10000) 1059 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1060 else if(io_duration_time <= 30000) 1061 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1062 else { 1063 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1064 1065 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1066 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1067 } 1068 } 1069 1070 /* fnic_fcpio_itmf_cmpl_handler 1071 * Routine to handle itmf completions 1072 */ 1073 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, unsigned int cq_index, 1074 struct fcpio_fw_req *desc) 1075 { 1076 u8 type; 1077 u8 hdr_status; 1078 struct fcpio_tag ftag; 1079 u32 id; 1080 struct scsi_cmnd *sc = NULL; 1081 struct fnic_io_req *io_req; 1082 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1083 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1084 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1085 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1086 unsigned long flags; 1087 unsigned long start_time; 1088 unsigned int hwq = cq_index; 1089 unsigned int mqtag; 1090 unsigned int tag; 1091 1092 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &ftag); 1093 fcpio_tag_id_dec(&ftag, &id); 1094 1095 mqtag = id & FNIC_TAG_MASK; 1096 tag = blk_mq_unique_tag_to_tag(id & FNIC_TAG_MASK); 1097 hwq = blk_mq_unique_tag_to_hwq(id & FNIC_TAG_MASK); 1098 1099 if (hwq != cq_index) { 1100 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1101 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ", 1102 hwq, mqtag, tag, cq_index); 1103 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1104 "hdr status: %s ITMF completion on the wrong queue\n", 1105 fnic_fcpio_status_to_str(hdr_status)); 1106 } 1107 1108 if (tag > fnic->fnic_max_tag_id) { 1109 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1110 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ", 1111 hwq, mqtag, tag, cq_index); 1112 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1113 "hdr status: %s Tag out of range\n", 1114 fnic_fcpio_status_to_str(hdr_status)); 1115 return; 1116 } else if ((tag == fnic->fnic_max_tag_id) && !(id & FNIC_TAG_DEV_RST)) { 1117 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1118 "hwq: %d mqtag: 0x%x tag: 0x%x cq index: %d ", 1119 hwq, mqtag, tag, cq_index); 1120 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1121 "hdr status: %s Tag out of range\n", 1122 fnic_fcpio_status_to_str(hdr_status)); 1123 return; 1124 } 1125 1126 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1127 1128 /* If it is sg3utils allocated SC then tag_id 1129 * is max_tag_id and SC is retrieved from io_req 1130 */ 1131 if ((mqtag == fnic->fnic_max_tag_id) && (id & FNIC_TAG_DEV_RST)) { 1132 io_req = fnic->sw_copy_wq[hwq].io_req_table[tag]; 1133 if (io_req) 1134 sc = io_req->sc; 1135 } else { 1136 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 1137 } 1138 1139 WARN_ON_ONCE(!sc); 1140 if (!sc) { 1141 atomic64_inc(&fnic_stats->io_stats.sc_null); 1142 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1143 shost_printk(KERN_ERR, fnic->lport->host, 1144 "itmf_cmpl sc is null - hdr status = %s tag = 0x%x\n", 1145 fnic_fcpio_status_to_str(hdr_status), tag); 1146 return; 1147 } 1148 1149 io_req = fnic_priv(sc)->io_req; 1150 WARN_ON_ONCE(!io_req); 1151 if (!io_req) { 1152 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1153 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1154 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 1155 shost_printk(KERN_ERR, fnic->lport->host, 1156 "itmf_cmpl io_req is null - " 1157 "hdr status = %s tag = 0x%x sc 0x%p\n", 1158 fnic_fcpio_status_to_str(hdr_status), tag, sc); 1159 return; 1160 } 1161 start_time = io_req->start_time; 1162 1163 if ((id & FNIC_TAG_ABORT) && (id & FNIC_TAG_DEV_RST)) { 1164 /* Abort and terminate completion of device reset req */ 1165 /* REVISIT : Add asserts about various flags */ 1166 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 1167 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Abt/term completion received\n", 1168 hwq, mqtag, tag, 1169 fnic_fcpio_status_to_str(hdr_status)); 1170 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 1171 fnic_priv(sc)->abts_status = hdr_status; 1172 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1173 if (io_req->abts_done) 1174 complete(io_req->abts_done); 1175 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1176 } else if (id & FNIC_TAG_ABORT) { 1177 /* Completion of abort cmd */ 1178 shost_printk(KERN_DEBUG, fnic->lport->host, 1179 "hwq: %d mqtag: 0x%x tag: 0x%x Abort header status: %s\n", 1180 hwq, mqtag, tag, 1181 fnic_fcpio_status_to_str(hdr_status)); 1182 switch (hdr_status) { 1183 case FCPIO_SUCCESS: 1184 break; 1185 case FCPIO_TIMEOUT: 1186 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1187 atomic64_inc(&abts_stats->abort_fw_timeouts); 1188 else 1189 atomic64_inc( 1190 &term_stats->terminate_fw_timeouts); 1191 break; 1192 case FCPIO_ITMF_REJECTED: 1193 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 1194 "abort reject recd. id %d\n", 1195 (int)(id & FNIC_TAG_MASK)); 1196 break; 1197 case FCPIO_IO_NOT_FOUND: 1198 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1199 atomic64_inc(&abts_stats->abort_io_not_found); 1200 else 1201 atomic64_inc( 1202 &term_stats->terminate_io_not_found); 1203 break; 1204 default: 1205 if (fnic_priv(sc)->flags & FNIC_IO_ABTS_ISSUED) 1206 atomic64_inc(&abts_stats->abort_failures); 1207 else 1208 atomic64_inc( 1209 &term_stats->terminate_failures); 1210 break; 1211 } 1212 if (fnic_priv(sc)->state != FNIC_IOREQ_ABTS_PENDING) { 1213 /* This is a late completion. Ignore it */ 1214 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1215 return; 1216 } 1217 1218 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE; 1219 fnic_priv(sc)->abts_status = hdr_status; 1220 1221 /* If the status is IO not found consider it as success */ 1222 if (hdr_status == FCPIO_IO_NOT_FOUND) 1223 fnic_priv(sc)->abts_status = FCPIO_SUCCESS; 1224 1225 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) 1226 atomic64_inc(&misc_stats->no_icmnd_itmf_cmpls); 1227 1228 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1229 "abts cmpl recd. id %d status %s\n", 1230 (int)(id & FNIC_TAG_MASK), 1231 fnic_fcpio_status_to_str(hdr_status)); 1232 1233 /* 1234 * If scsi_eh thread is blocked waiting for abts to complete, 1235 * signal completion to it. IO will be cleaned in the thread 1236 * else clean it in this context 1237 */ 1238 if (io_req->abts_done) { 1239 complete(io_req->abts_done); 1240 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1241 shost_printk(KERN_INFO, fnic->lport->host, 1242 "hwq: %d mqtag: 0x%x tag: 0x%x Waking up abort thread\n", 1243 hwq, mqtag, tag); 1244 } else { 1245 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1246 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Completing IO\n", 1247 hwq, mqtag, 1248 tag, fnic_fcpio_status_to_str(hdr_status)); 1249 fnic_priv(sc)->io_req = NULL; 1250 sc->result = (DID_ERROR << 16); 1251 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL; 1252 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1253 1254 fnic_release_ioreq_buf(fnic, io_req, sc); 1255 mempool_free(io_req, fnic->io_req_pool); 1256 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1257 sc->device->host->host_no, id, 1258 sc, 1259 jiffies_to_msecs(jiffies - start_time), 1260 desc, 1261 (((u64)hdr_status << 40) | 1262 (u64)sc->cmnd[0] << 32 | 1263 (u64)sc->cmnd[2] << 24 | 1264 (u64)sc->cmnd[3] << 16 | 1265 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1266 fnic_flags_and_state(sc)); 1267 scsi_done(sc); 1268 atomic64_dec(&fnic_stats->io_stats.active_ios); 1269 if (atomic64_read(&fnic->io_cmpl_skip)) 1270 atomic64_dec(&fnic->io_cmpl_skip); 1271 else 1272 atomic64_inc(&fnic_stats->io_stats.io_completions); 1273 } 1274 } else if (id & FNIC_TAG_DEV_RST) { 1275 /* Completion of device reset */ 1276 shost_printk(KERN_INFO, fnic->lport->host, 1277 "hwq: %d mqtag: 0x%x tag: 0x%x DR hst: %s\n", 1278 hwq, mqtag, 1279 tag, fnic_fcpio_status_to_str(hdr_status)); 1280 fnic_priv(sc)->lr_status = hdr_status; 1281 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1282 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1283 fnic_priv(sc)->flags |= FNIC_DEV_RST_ABTS_PENDING; 1284 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1285 sc->device->host->host_no, id, sc, 1286 jiffies_to_msecs(jiffies - start_time), 1287 desc, 0, fnic_flags_and_state(sc)); 1288 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1289 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s Terminate pending\n", 1290 hwq, mqtag, 1291 tag, fnic_fcpio_status_to_str(hdr_status)); 1292 return; 1293 } 1294 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TIMED_OUT) { 1295 /* Need to wait for terminate completion */ 1296 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1297 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1298 sc->device->host->host_no, id, sc, 1299 jiffies_to_msecs(jiffies - start_time), 1300 desc, 0, fnic_flags_and_state(sc)); 1301 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1302 "dev reset cmpl recd after time out. " 1303 "id %d status %s\n", 1304 (int)(id & FNIC_TAG_MASK), 1305 fnic_fcpio_status_to_str(hdr_status)); 1306 return; 1307 } 1308 fnic_priv(sc)->state = FNIC_IOREQ_CMD_COMPLETE; 1309 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1310 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 1311 "hwq: %d mqtag: 0x%x tag: 0x%x hst: %s DR completion received\n", 1312 hwq, mqtag, 1313 tag, fnic_fcpio_status_to_str(hdr_status)); 1314 if (io_req->dr_done) 1315 complete(io_req->dr_done); 1316 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1317 1318 } else { 1319 shost_printk(KERN_ERR, fnic->lport->host, 1320 "%s: Unexpected itmf io state: hwq: %d tag 0x%x %s\n", 1321 __func__, hwq, id, fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 1322 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1323 } 1324 1325 } 1326 1327 /* 1328 * fnic_fcpio_cmpl_handler 1329 * Routine to service the cq for wq_copy 1330 */ 1331 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1332 unsigned int cq_index, 1333 struct fcpio_fw_req *desc) 1334 { 1335 struct fnic *fnic = vnic_dev_priv(vdev); 1336 1337 switch (desc->hdr.type) { 1338 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1339 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1340 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1341 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1342 case FCPIO_RESET_CMPL: /* fw completed reset */ 1343 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1344 break; 1345 default: 1346 break; 1347 } 1348 1349 cq_index -= fnic->copy_wq_base; 1350 1351 switch (desc->hdr.type) { 1352 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1353 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1354 break; 1355 1356 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1357 fnic_fcpio_icmnd_cmpl_handler(fnic, cq_index, desc); 1358 break; 1359 1360 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1361 fnic_fcpio_itmf_cmpl_handler(fnic, cq_index, desc); 1362 break; 1363 1364 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1365 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1366 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1367 break; 1368 1369 case FCPIO_RESET_CMPL: /* fw completed reset */ 1370 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1371 break; 1372 1373 default: 1374 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1375 "firmware completion type %d\n", 1376 desc->hdr.type); 1377 break; 1378 } 1379 1380 return 0; 1381 } 1382 1383 /* 1384 * fnic_wq_copy_cmpl_handler 1385 * Routine to process wq copy 1386 */ 1387 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do, unsigned int cq_index) 1388 { 1389 unsigned int cur_work_done; 1390 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1391 u64 start_jiffies = 0; 1392 u64 end_jiffies = 0; 1393 u64 delta_jiffies = 0; 1394 u64 delta_ms = 0; 1395 1396 start_jiffies = jiffies; 1397 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1398 fnic_fcpio_cmpl_handler, 1399 copy_work_to_do); 1400 end_jiffies = jiffies; 1401 delta_jiffies = end_jiffies - start_jiffies; 1402 if (delta_jiffies > (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { 1403 atomic64_set(&misc_stats->max_isr_jiffies, delta_jiffies); 1404 delta_ms = jiffies_to_msecs(delta_jiffies); 1405 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); 1406 atomic64_set(&misc_stats->corr_work_done, cur_work_done); 1407 } 1408 1409 return cur_work_done; 1410 } 1411 1412 static bool fnic_cleanup_io_iter(struct scsi_cmnd *sc, void *data) 1413 { 1414 struct request *const rq = scsi_cmd_to_rq(sc); 1415 struct fnic *fnic = data; 1416 struct fnic_io_req *io_req; 1417 unsigned long flags = 0; 1418 unsigned long start_time = 0; 1419 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1420 uint16_t hwq = 0; 1421 int tag; 1422 int mqtag; 1423 1424 mqtag = blk_mq_unique_tag(rq); 1425 hwq = blk_mq_unique_tag_to_hwq(mqtag); 1426 tag = blk_mq_unique_tag_to_tag(mqtag); 1427 1428 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1429 1430 fnic->sw_copy_wq[hwq].io_req_table[tag] = NULL; 1431 1432 io_req = fnic_priv(sc)->io_req; 1433 if (!io_req) { 1434 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1435 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1436 "hwq: %d mqtag: 0x%x tag: 0x%x flags: 0x%x No ioreq. Returning\n", 1437 hwq, mqtag, tag, fnic_priv(sc)->flags); 1438 return true; 1439 } 1440 1441 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 1442 !(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { 1443 /* 1444 * We will be here only when FW completes reset 1445 * without sending completions for outstanding ios. 1446 */ 1447 fnic_priv(sc)->flags |= FNIC_DEV_RST_DONE; 1448 if (io_req && io_req->dr_done) 1449 complete(io_req->dr_done); 1450 else if (io_req && io_req->abts_done) 1451 complete(io_req->abts_done); 1452 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1453 return true; 1454 } else if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 1455 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1456 return true; 1457 } 1458 1459 fnic_priv(sc)->io_req = NULL; 1460 io_req->sc = NULL; 1461 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1462 1463 /* 1464 * If there is a scsi_cmnd associated with this io_req, then 1465 * free the corresponding state 1466 */ 1467 start_time = io_req->start_time; 1468 fnic_release_ioreq_buf(fnic, io_req, sc); 1469 mempool_free(io_req, fnic->io_req_pool); 1470 1471 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1472 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1473 "mqtag:0x%x tag: 0x%x sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", 1474 mqtag, tag, sc, (jiffies - start_time)); 1475 1476 if (atomic64_read(&fnic->io_cmpl_skip)) 1477 atomic64_dec(&fnic->io_cmpl_skip); 1478 else 1479 atomic64_inc(&fnic_stats->io_stats.io_completions); 1480 1481 FNIC_TRACE(fnic_cleanup_io, 1482 sc->device->host->host_no, tag, sc, 1483 jiffies_to_msecs(jiffies - start_time), 1484 0, ((u64)sc->cmnd[0] << 32 | 1485 (u64)sc->cmnd[2] << 24 | 1486 (u64)sc->cmnd[3] << 16 | 1487 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1488 fnic_flags_and_state(sc)); 1489 1490 scsi_done(sc); 1491 1492 return true; 1493 } 1494 1495 static void fnic_cleanup_io(struct fnic *fnic) 1496 { 1497 scsi_host_busy_iter(fnic->lport->host, 1498 fnic_cleanup_io_iter, fnic); 1499 } 1500 1501 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1502 struct fcpio_host_req *desc) 1503 { 1504 u32 id; 1505 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1506 struct fnic_io_req *io_req; 1507 struct scsi_cmnd *sc; 1508 unsigned long flags; 1509 unsigned long start_time = 0; 1510 uint16_t hwq; 1511 1512 /* get the tag reference */ 1513 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1514 id &= FNIC_TAG_MASK; 1515 1516 if (id >= fnic->fnic_max_tag_id) 1517 return; 1518 1519 sc = scsi_host_find_tag(fnic->lport->host, id); 1520 if (!sc) 1521 return; 1522 1523 hwq = blk_mq_unique_tag_to_hwq(id); 1524 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1525 1526 /* Get the IO context which this desc refers to */ 1527 io_req = fnic_priv(sc)->io_req; 1528 1529 /* fnic interrupts are turned off by now */ 1530 1531 if (!io_req) { 1532 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1533 goto wq_copy_cleanup_scsi_cmd; 1534 } 1535 1536 fnic_priv(sc)->io_req = NULL; 1537 io_req->sc = NULL; 1538 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(id)] = NULL; 1539 1540 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1541 1542 start_time = io_req->start_time; 1543 fnic_release_ioreq_buf(fnic, io_req, sc); 1544 mempool_free(io_req, fnic->io_req_pool); 1545 1546 wq_copy_cleanup_scsi_cmd: 1547 sc->result = DID_NO_CONNECT << 16; 1548 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, "wq_copy_cleanup_handler:" 1549 " DID_NO_CONNECT\n"); 1550 1551 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1552 sc->device->host->host_no, id, sc, 1553 jiffies_to_msecs(jiffies - start_time), 1554 0, ((u64)sc->cmnd[0] << 32 | 1555 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1556 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1557 fnic_flags_and_state(sc)); 1558 1559 scsi_done(sc); 1560 } 1561 1562 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1563 u32 task_req, u8 *fc_lun, 1564 struct fnic_io_req *io_req, 1565 unsigned int hwq) 1566 { 1567 struct vnic_wq_copy *wq = &fnic->hw_copy_wq[hwq]; 1568 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1569 unsigned long flags; 1570 1571 spin_lock_irqsave(&fnic->fnic_lock, flags); 1572 if (unlikely(fnic_chk_state_flags_locked(fnic, 1573 FNIC_FLAGS_IO_BLOCKED))) { 1574 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1575 return 1; 1576 } else 1577 atomic_inc(&fnic->in_flight); 1578 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1579 1580 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1581 1582 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq]) 1583 free_wq_copy_descs(fnic, wq, hwq); 1584 1585 if (!vnic_wq_copy_desc_avail(wq)) { 1586 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1587 atomic_dec(&fnic->in_flight); 1588 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1589 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1590 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1591 return 1; 1592 } 1593 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1594 0, task_req, tag, fc_lun, io_req->port_id, 1595 fnic->config.ra_tov, fnic->config.ed_tov); 1596 1597 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1598 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1599 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1600 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1601 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1602 1603 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1604 atomic_dec(&fnic->in_flight); 1605 1606 return 0; 1607 } 1608 1609 struct fnic_rport_abort_io_iter_data { 1610 struct fnic *fnic; 1611 u32 port_id; 1612 int term_cnt; 1613 }; 1614 1615 static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data) 1616 { 1617 struct request *const rq = scsi_cmd_to_rq(sc); 1618 struct fnic_rport_abort_io_iter_data *iter_data = data; 1619 struct fnic *fnic = iter_data->fnic; 1620 int abt_tag = 0; 1621 struct fnic_io_req *io_req; 1622 unsigned long flags; 1623 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1624 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1625 struct scsi_lun fc_lun; 1626 enum fnic_ioreq_state old_ioreq_state; 1627 uint16_t hwq = 0; 1628 1629 abt_tag = blk_mq_unique_tag(rq); 1630 hwq = blk_mq_unique_tag_to_hwq(abt_tag); 1631 1632 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1633 1634 io_req = fnic_priv(sc)->io_req; 1635 1636 if (!io_req || io_req->port_id != iter_data->port_id) { 1637 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1638 return true; 1639 } 1640 1641 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 1642 !(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED)) { 1643 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1644 "hwq: %d abt_tag: 0x%x flags: 0x%x Device reset is not pending\n", 1645 hwq, abt_tag, fnic_priv(sc)->flags); 1646 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1647 return true; 1648 } 1649 1650 /* 1651 * Found IO that is still pending with firmware and 1652 * belongs to rport that went away 1653 */ 1654 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1655 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1656 return true; 1657 } 1658 if (io_req->abts_done) { 1659 shost_printk(KERN_ERR, fnic->lport->host, 1660 "fnic_rport_exch_reset: io_req->abts_done is set " 1661 "state is %s\n", 1662 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 1663 } 1664 1665 if (!(fnic_priv(sc)->flags & FNIC_IO_ISSUED)) { 1666 shost_printk(KERN_ERR, fnic->lport->host, 1667 "rport_exch_reset " 1668 "IO not yet issued %p tag 0x%x flags " 1669 "%x state %d\n", 1670 sc, abt_tag, fnic_priv(sc)->flags, fnic_priv(sc)->state); 1671 } 1672 old_ioreq_state = fnic_priv(sc)->state; 1673 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 1674 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 1675 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 1676 atomic64_inc(&reset_stats->device_reset_terminates); 1677 abt_tag |= FNIC_TAG_DEV_RST; 1678 } 1679 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1680 "fnic_rport_exch_reset dev rst sc 0x%p\n", sc); 1681 BUG_ON(io_req->abts_done); 1682 1683 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1684 "fnic_rport_reset_exch: Issuing abts\n"); 1685 1686 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1687 1688 /* Now queue the abort command to firmware */ 1689 int_to_scsilun(sc->device->lun, &fc_lun); 1690 1691 if (fnic_queue_abort_io_req(fnic, abt_tag, 1692 FCPIO_ITMF_ABT_TASK_TERM, 1693 fc_lun.scsi_lun, io_req, hwq)) { 1694 /* 1695 * Revert the cmd state back to old state, if 1696 * it hasn't changed in between. This cmd will get 1697 * aborted later by scsi_eh, or cleaned up during 1698 * lun reset 1699 */ 1700 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1701 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1702 "hwq: %d abt_tag: 0x%x flags: 0x%x Queuing abort failed\n", 1703 hwq, abt_tag, fnic_priv(sc)->flags); 1704 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 1705 fnic_priv(sc)->state = old_ioreq_state; 1706 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1707 } else { 1708 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1709 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) 1710 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 1711 else 1712 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED; 1713 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1714 atomic64_inc(&term_stats->terminates); 1715 iter_data->term_cnt++; 1716 } 1717 return true; 1718 } 1719 1720 static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1721 { 1722 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1723 struct fnic_rport_abort_io_iter_data iter_data = { 1724 .fnic = fnic, 1725 .port_id = port_id, 1726 .term_cnt = 0, 1727 }; 1728 1729 FNIC_SCSI_DBG(KERN_DEBUG, 1730 fnic->lport->host, fnic->fnic_num, 1731 "fnic_rport_exch_reset called portid 0x%06x\n", 1732 port_id); 1733 1734 if (fnic->in_remove) 1735 return; 1736 1737 scsi_host_busy_iter(fnic->lport->host, fnic_rport_abort_io_iter, 1738 &iter_data); 1739 if (iter_data.term_cnt > atomic64_read(&term_stats->max_terminates)) 1740 atomic64_set(&term_stats->max_terminates, iter_data.term_cnt); 1741 1742 } 1743 1744 void fnic_terminate_rport_io(struct fc_rport *rport) 1745 { 1746 struct fc_rport_libfc_priv *rdata; 1747 struct fc_lport *lport; 1748 struct fnic *fnic; 1749 1750 if (!rport) { 1751 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1752 return; 1753 } 1754 rdata = rport->dd_data; 1755 1756 if (!rdata) { 1757 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1758 return; 1759 } 1760 lport = rdata->local_port; 1761 1762 if (!lport) { 1763 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1764 return; 1765 } 1766 fnic = lport_priv(lport); 1767 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1768 "wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1769 rport->port_name, rport->node_name, rport, 1770 rport->port_id); 1771 1772 if (fnic->in_remove) 1773 return; 1774 1775 fnic_rport_exch_reset(fnic, rport->port_id); 1776 } 1777 1778 /* 1779 * This function is exported to SCSI for sending abort cmnds. 1780 * A SCSI IO is represented by a io_req in the driver. 1781 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1782 */ 1783 int fnic_abort_cmd(struct scsi_cmnd *sc) 1784 { 1785 struct request *const rq = scsi_cmd_to_rq(sc); 1786 struct fc_lport *lp; 1787 struct fnic *fnic; 1788 struct fnic_io_req *io_req = NULL; 1789 struct fc_rport *rport; 1790 unsigned long flags; 1791 unsigned long start_time = 0; 1792 int ret = SUCCESS; 1793 u32 task_req = 0; 1794 struct scsi_lun fc_lun; 1795 struct fnic_stats *fnic_stats; 1796 struct abort_stats *abts_stats; 1797 struct terminate_stats *term_stats; 1798 enum fnic_ioreq_state old_ioreq_state; 1799 int mqtag; 1800 unsigned long abt_issued_time; 1801 uint16_t hwq = 0; 1802 1803 DECLARE_COMPLETION_ONSTACK(tm_done); 1804 1805 /* Wait for rport to unblock */ 1806 fc_block_scsi_eh(sc); 1807 1808 /* Get local-port, check ready and link up */ 1809 lp = shost_priv(sc->device->host); 1810 1811 fnic = lport_priv(lp); 1812 1813 spin_lock_irqsave(&fnic->fnic_lock, flags); 1814 fnic_stats = &fnic->fnic_stats; 1815 abts_stats = &fnic->fnic_stats.abts_stats; 1816 term_stats = &fnic->fnic_stats.term_stats; 1817 1818 rport = starget_to_rport(scsi_target(sc->device)); 1819 mqtag = blk_mq_unique_tag(rq); 1820 hwq = blk_mq_unique_tag_to_hwq(mqtag); 1821 1822 fnic_priv(sc)->flags = FNIC_NO_FLAGS; 1823 1824 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1825 ret = FAILED; 1826 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1827 goto fnic_abort_cmd_end; 1828 } 1829 1830 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1831 /* 1832 * Avoid a race between SCSI issuing the abort and the device 1833 * completing the command. 1834 * 1835 * If the command is already completed by the fw cmpl code, 1836 * we just return SUCCESS from here. This means that the abort 1837 * succeeded. In the SCSI ML, since the timeout for command has 1838 * happened, the completion wont actually complete the command 1839 * and it will be considered as an aborted command 1840 * 1841 * .io_req will not be cleared except while holding io_req_lock. 1842 */ 1843 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1844 io_req = fnic_priv(sc)->io_req; 1845 if (!io_req) { 1846 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1847 goto fnic_abort_cmd_end; 1848 } 1849 1850 io_req->abts_done = &tm_done; 1851 1852 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 1853 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1854 goto wait_pending; 1855 } 1856 1857 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1858 if (abt_issued_time <= 6000) 1859 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1860 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1861 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1862 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1863 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1864 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1865 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1866 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1867 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1868 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1869 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1870 else 1871 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1872 1873 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 1874 "CDB Opcode: 0x%02x Abort issued time: %lu msec\n", 1875 sc->cmnd[0], abt_issued_time); 1876 /* 1877 * Command is still pending, need to abort it 1878 * If the firmware completes the command after this point, 1879 * the completion wont be done till mid-layer, since abort 1880 * has already started. 1881 */ 1882 old_ioreq_state = fnic_priv(sc)->state; 1883 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 1884 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 1885 1886 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1887 1888 /* 1889 * Check readiness of the remote port. If the path to remote 1890 * port is up, then send abts to the remote port to terminate 1891 * the IO. Else, just locally terminate the IO in the firmware 1892 */ 1893 if (fc_remote_port_chkready(rport) == 0) 1894 task_req = FCPIO_ITMF_ABT_TASK; 1895 else { 1896 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1897 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1898 } 1899 1900 /* Now queue the abort command to firmware */ 1901 int_to_scsilun(sc->device->lun, &fc_lun); 1902 1903 if (fnic_queue_abort_io_req(fnic, mqtag, task_req, fc_lun.scsi_lun, 1904 io_req, hwq)) { 1905 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1906 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 1907 fnic_priv(sc)->state = old_ioreq_state; 1908 io_req = fnic_priv(sc)->io_req; 1909 if (io_req) 1910 io_req->abts_done = NULL; 1911 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1912 ret = FAILED; 1913 goto fnic_abort_cmd_end; 1914 } 1915 if (task_req == FCPIO_ITMF_ABT_TASK) { 1916 fnic_priv(sc)->flags |= FNIC_IO_ABTS_ISSUED; 1917 atomic64_inc(&fnic_stats->abts_stats.aborts); 1918 } else { 1919 fnic_priv(sc)->flags |= FNIC_IO_TERM_ISSUED; 1920 atomic64_inc(&fnic_stats->term_stats.terminates); 1921 } 1922 1923 /* 1924 * We queued an abort IO, wait for its completion. 1925 * Once the firmware completes the abort command, it will 1926 * wake up this thread. 1927 */ 1928 wait_pending: 1929 wait_for_completion_timeout(&tm_done, 1930 msecs_to_jiffies 1931 (2 * fnic->config.ra_tov + 1932 fnic->config.ed_tov)); 1933 1934 /* Check the abort status */ 1935 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 1936 1937 io_req = fnic_priv(sc)->io_req; 1938 if (!io_req) { 1939 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1940 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1941 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 1942 ret = FAILED; 1943 goto fnic_abort_cmd_end; 1944 } 1945 io_req->abts_done = NULL; 1946 1947 /* fw did not complete abort, timed out */ 1948 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) { 1949 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1950 if (task_req == FCPIO_ITMF_ABT_TASK) { 1951 atomic64_inc(&abts_stats->abort_drv_timeouts); 1952 } else { 1953 atomic64_inc(&term_stats->terminate_drv_timeouts); 1954 } 1955 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_TIMED_OUT; 1956 ret = FAILED; 1957 goto fnic_abort_cmd_end; 1958 } 1959 1960 /* IO out of order */ 1961 1962 if (!(fnic_priv(sc)->flags & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 1963 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1964 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 1965 "Issuing host reset due to out of order IO\n"); 1966 1967 ret = FAILED; 1968 goto fnic_abort_cmd_end; 1969 } 1970 1971 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 1972 1973 start_time = io_req->start_time; 1974 /* 1975 * firmware completed the abort, check the status, 1976 * free the io_req if successful. If abort fails, 1977 * Device reset will clean the I/O. 1978 */ 1979 if (fnic_priv(sc)->abts_status == FCPIO_SUCCESS || 1980 (fnic_priv(sc)->abts_status == FCPIO_ABORTED)) { 1981 fnic_priv(sc)->io_req = NULL; 1982 io_req->sc = NULL; 1983 } else { 1984 ret = FAILED; 1985 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1986 goto fnic_abort_cmd_end; 1987 } 1988 1989 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = NULL; 1990 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 1991 1992 fnic_release_ioreq_buf(fnic, io_req, sc); 1993 mempool_free(io_req, fnic->io_req_pool); 1994 1995 /* Call SCSI completion function to complete the IO */ 1996 sc->result = DID_ABORT << 16; 1997 scsi_done(sc); 1998 atomic64_dec(&fnic_stats->io_stats.active_ios); 1999 if (atomic64_read(&fnic->io_cmpl_skip)) 2000 atomic64_dec(&fnic->io_cmpl_skip); 2001 else 2002 atomic64_inc(&fnic_stats->io_stats.io_completions); 2003 2004 fnic_abort_cmd_end: 2005 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, mqtag, sc, 2006 jiffies_to_msecs(jiffies - start_time), 2007 0, ((u64)sc->cmnd[0] << 32 | 2008 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2009 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2010 fnic_flags_and_state(sc)); 2011 2012 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2013 "Returning from abort cmd type %x %s\n", task_req, 2014 (ret == SUCCESS) ? 2015 "SUCCESS" : "FAILED"); 2016 return ret; 2017 } 2018 2019 static inline int fnic_queue_dr_io_req(struct fnic *fnic, 2020 struct scsi_cmnd *sc, 2021 struct fnic_io_req *io_req) 2022 { 2023 struct vnic_wq_copy *wq; 2024 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 2025 struct scsi_lun fc_lun; 2026 int ret = 0; 2027 unsigned long flags; 2028 uint16_t hwq = 0; 2029 uint32_t tag = 0; 2030 2031 tag = io_req->tag; 2032 hwq = blk_mq_unique_tag_to_hwq(tag); 2033 wq = &fnic->hw_copy_wq[hwq]; 2034 2035 spin_lock_irqsave(&fnic->fnic_lock, flags); 2036 if (unlikely(fnic_chk_state_flags_locked(fnic, 2037 FNIC_FLAGS_IO_BLOCKED))) { 2038 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2039 return FAILED; 2040 } else 2041 atomic_inc(&fnic->in_flight); 2042 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2043 2044 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2045 2046 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[hwq]) 2047 free_wq_copy_descs(fnic, wq, hwq); 2048 2049 if (!vnic_wq_copy_desc_avail(wq)) { 2050 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2051 "queue_dr_io_req failure - no descriptors\n"); 2052 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 2053 ret = -EAGAIN; 2054 goto lr_io_req_end; 2055 } 2056 2057 /* fill in the lun info */ 2058 int_to_scsilun(sc->device->lun, &fc_lun); 2059 2060 tag |= FNIC_TAG_DEV_RST; 2061 fnic_queue_wq_copy_desc_itmf(wq, tag, 2062 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 2063 fc_lun.scsi_lun, io_req->port_id, 2064 fnic->config.ra_tov, fnic->config.ed_tov); 2065 2066 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 2067 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 2068 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 2069 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 2070 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 2071 2072 lr_io_req_end: 2073 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2074 atomic_dec(&fnic->in_flight); 2075 2076 return ret; 2077 } 2078 2079 struct fnic_pending_aborts_iter_data { 2080 struct fnic *fnic; 2081 struct scsi_cmnd *lr_sc; 2082 struct scsi_device *lun_dev; 2083 int ret; 2084 }; 2085 2086 static bool fnic_pending_aborts_iter(struct scsi_cmnd *sc, void *data) 2087 { 2088 struct request *const rq = scsi_cmd_to_rq(sc); 2089 struct fnic_pending_aborts_iter_data *iter_data = data; 2090 struct fnic *fnic = iter_data->fnic; 2091 struct scsi_device *lun_dev = iter_data->lun_dev; 2092 unsigned long abt_tag = 0; 2093 uint16_t hwq = 0; 2094 struct fnic_io_req *io_req; 2095 unsigned long flags; 2096 struct scsi_lun fc_lun; 2097 DECLARE_COMPLETION_ONSTACK(tm_done); 2098 enum fnic_ioreq_state old_ioreq_state; 2099 2100 if (sc == iter_data->lr_sc || sc->device != lun_dev) 2101 return true; 2102 2103 abt_tag = blk_mq_unique_tag(rq); 2104 hwq = blk_mq_unique_tag_to_hwq(abt_tag); 2105 2106 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2107 io_req = fnic_priv(sc)->io_req; 2108 if (!io_req) { 2109 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2110 return true; 2111 } 2112 2113 /* 2114 * Found IO that is still pending with firmware and 2115 * belongs to the LUN that we are resetting 2116 */ 2117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2118 "Found IO in %s on lun\n", 2119 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2120 2121 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) { 2122 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2123 return true; 2124 } 2125 if ((fnic_priv(sc)->flags & FNIC_DEVICE_RESET) && 2126 (!(fnic_priv(sc)->flags & FNIC_DEV_RST_ISSUED))) { 2127 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 2128 "dev rst not pending sc 0x%p\n", sc); 2129 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2130 return true; 2131 } 2132 2133 if (io_req->abts_done) 2134 shost_printk(KERN_ERR, fnic->lport->host, 2135 "%s: io_req->abts_done is set state is %s\n", 2136 __func__, fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2137 old_ioreq_state = fnic_priv(sc)->state; 2138 /* 2139 * Any pending IO issued prior to reset is expected to be 2140 * in abts pending state, if not we need to set 2141 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2142 * When IO is completed, the IO will be handed over and 2143 * handled in this function. 2144 */ 2145 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 2146 2147 BUG_ON(io_req->abts_done); 2148 2149 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) { 2150 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 2151 "dev rst sc 0x%p\n", sc); 2152 } 2153 2154 fnic_priv(sc)->abts_status = FCPIO_INVALID_CODE; 2155 io_req->abts_done = &tm_done; 2156 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2157 2158 /* Now queue the abort command to firmware */ 2159 int_to_scsilun(sc->device->lun, &fc_lun); 2160 2161 if (fnic_queue_abort_io_req(fnic, abt_tag, 2162 FCPIO_ITMF_ABT_TASK_TERM, 2163 fc_lun.scsi_lun, io_req, hwq)) { 2164 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2165 io_req = fnic_priv(sc)->io_req; 2166 if (io_req) 2167 io_req->abts_done = NULL; 2168 if (fnic_priv(sc)->state == FNIC_IOREQ_ABTS_PENDING) 2169 fnic_priv(sc)->state = old_ioreq_state; 2170 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2171 iter_data->ret = FAILED; 2172 FNIC_SCSI_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num, 2173 "hwq: %d abt_tag: 0x%lx Abort could not be queued\n", 2174 hwq, abt_tag); 2175 return false; 2176 } else { 2177 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2178 if (fnic_priv(sc)->flags & FNIC_DEVICE_RESET) 2179 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 2180 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2181 } 2182 fnic_priv(sc)->flags |= FNIC_IO_INTERNAL_TERM_ISSUED; 2183 2184 wait_for_completion_timeout(&tm_done, msecs_to_jiffies 2185 (fnic->config.ed_tov)); 2186 2187 /* Recheck cmd state to check if it is now aborted */ 2188 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2189 io_req = fnic_priv(sc)->io_req; 2190 if (!io_req) { 2191 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2192 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_REQ_NULL; 2193 return true; 2194 } 2195 2196 io_req->abts_done = NULL; 2197 2198 /* if abort is still pending with fw, fail */ 2199 if (fnic_priv(sc)->abts_status == FCPIO_INVALID_CODE) { 2200 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2201 fnic_priv(sc)->flags |= FNIC_IO_ABT_TERM_DONE; 2202 iter_data->ret = FAILED; 2203 return false; 2204 } 2205 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_COMPLETE; 2206 2207 /* original sc used for lr is handled by dev reset code */ 2208 if (sc != iter_data->lr_sc) { 2209 fnic_priv(sc)->io_req = NULL; 2210 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(abt_tag)] = NULL; 2211 } 2212 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2213 2214 /* original sc used for lr is handled by dev reset code */ 2215 if (sc != iter_data->lr_sc) { 2216 fnic_release_ioreq_buf(fnic, io_req, sc); 2217 mempool_free(io_req, fnic->io_req_pool); 2218 } 2219 2220 /* 2221 * Any IO is returned during reset, it needs to call scsi_done 2222 * to return the scsi_cmnd to upper layer. 2223 */ 2224 /* Set result to let upper SCSI layer retry */ 2225 sc->result = DID_RESET << 16; 2226 scsi_done(sc); 2227 2228 return true; 2229 } 2230 2231 /* 2232 * Clean up any pending aborts on the lun 2233 * For each outstanding IO on this lun, whose abort is not completed by fw, 2234 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2235 * successfully aborted, 1 otherwise 2236 */ 2237 static int fnic_clean_pending_aborts(struct fnic *fnic, 2238 struct scsi_cmnd *lr_sc, 2239 bool new_sc) 2240 2241 { 2242 int ret = 0; 2243 struct fnic_pending_aborts_iter_data iter_data = { 2244 .fnic = fnic, 2245 .lun_dev = lr_sc->device, 2246 .ret = SUCCESS, 2247 }; 2248 2249 iter_data.lr_sc = lr_sc; 2250 2251 scsi_host_busy_iter(fnic->lport->host, 2252 fnic_pending_aborts_iter, &iter_data); 2253 if (iter_data.ret == FAILED) { 2254 ret = iter_data.ret; 2255 goto clean_pending_aborts_end; 2256 } 2257 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2258 2259 /* walk again to check, if IOs are still pending in fw */ 2260 if (fnic_is_abts_pending(fnic, lr_sc)) 2261 ret = 1; 2262 2263 clean_pending_aborts_end: 2264 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 2265 "exit status: %d\n", ret); 2266 return ret; 2267 } 2268 2269 /* 2270 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2271 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2272 * on the LUN. 2273 */ 2274 int fnic_device_reset(struct scsi_cmnd *sc) 2275 { 2276 struct request *rq = scsi_cmd_to_rq(sc); 2277 struct fc_lport *lp; 2278 struct fnic *fnic; 2279 struct fnic_io_req *io_req = NULL; 2280 struct fc_rport *rport; 2281 int status; 2282 int ret = FAILED; 2283 unsigned long flags; 2284 unsigned long start_time = 0; 2285 struct scsi_lun fc_lun; 2286 struct fnic_stats *fnic_stats; 2287 struct reset_stats *reset_stats; 2288 int mqtag = rq->tag; 2289 DECLARE_COMPLETION_ONSTACK(tm_done); 2290 bool new_sc = 0; 2291 uint16_t hwq = 0; 2292 2293 /* Wait for rport to unblock */ 2294 fc_block_scsi_eh(sc); 2295 2296 /* Get local-port, check ready and link up */ 2297 lp = shost_priv(sc->device->host); 2298 2299 fnic = lport_priv(lp); 2300 fnic_stats = &fnic->fnic_stats; 2301 reset_stats = &fnic->fnic_stats.reset_stats; 2302 2303 atomic64_inc(&reset_stats->device_resets); 2304 2305 rport = starget_to_rport(scsi_target(sc->device)); 2306 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2307 "fcid: 0x%x lun: 0x%llx hwq: %d mqtag: 0x%x flags: 0x%x Device reset\n", 2308 rport->port_id, sc->device->lun, hwq, mqtag, 2309 fnic_priv(sc)->flags); 2310 2311 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2312 goto fnic_device_reset_end; 2313 2314 /* Check if remote port up */ 2315 if (fc_remote_port_chkready(rport)) { 2316 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2317 goto fnic_device_reset_end; 2318 } 2319 2320 fnic_priv(sc)->flags = FNIC_DEVICE_RESET; 2321 2322 if (unlikely(mqtag < 0)) { 2323 /* 2324 * For device reset issued through sg3utils, we let 2325 * only one LUN_RESET to go through and use a special 2326 * tag equal to max_tag_id so that we don't have to allocate 2327 * or free it. It won't interact with tags 2328 * allocated by mid layer. 2329 */ 2330 mutex_lock(&fnic->sgreset_mutex); 2331 mqtag = fnic->fnic_max_tag_id; 2332 new_sc = 1; 2333 } else { 2334 mqtag = blk_mq_unique_tag(rq); 2335 hwq = blk_mq_unique_tag_to_hwq(mqtag); 2336 } 2337 2338 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2339 io_req = fnic_priv(sc)->io_req; 2340 2341 /* 2342 * If there is a io_req attached to this command, then use it, 2343 * else allocate a new one. 2344 */ 2345 if (!io_req) { 2346 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2347 if (!io_req) { 2348 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2349 goto fnic_device_reset_end; 2350 } 2351 memset(io_req, 0, sizeof(*io_req)); 2352 io_req->port_id = rport->port_id; 2353 io_req->tag = mqtag; 2354 fnic_priv(sc)->io_req = io_req; 2355 io_req->sc = sc; 2356 2357 if (fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] != NULL) 2358 WARN(1, "fnic<%d>: %s: tag 0x%x already exists\n", 2359 fnic->fnic_num, __func__, blk_mq_unique_tag_to_tag(mqtag)); 2360 2361 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(mqtag)] = 2362 io_req; 2363 } 2364 io_req->dr_done = &tm_done; 2365 fnic_priv(sc)->state = FNIC_IOREQ_CMD_PENDING; 2366 fnic_priv(sc)->lr_status = FCPIO_INVALID_CODE; 2367 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2368 2369 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, "TAG %x\n", mqtag); 2370 2371 /* 2372 * issue the device reset, if enqueue failed, clean up the ioreq 2373 * and break assoc with scsi cmd 2374 */ 2375 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2376 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2377 io_req = fnic_priv(sc)->io_req; 2378 if (io_req) 2379 io_req->dr_done = NULL; 2380 goto fnic_device_reset_clean; 2381 } 2382 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2383 fnic_priv(sc)->flags |= FNIC_DEV_RST_ISSUED; 2384 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2385 2386 /* 2387 * Wait on the local completion for LUN reset. The io_req may be 2388 * freed while we wait since we hold no lock. 2389 */ 2390 wait_for_completion_timeout(&tm_done, 2391 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2392 2393 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2394 io_req = fnic_priv(sc)->io_req; 2395 if (!io_req) { 2396 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2397 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2398 "io_req is null mqtag 0x%x sc 0x%p\n", mqtag, sc); 2399 goto fnic_device_reset_end; 2400 } 2401 io_req->dr_done = NULL; 2402 2403 status = fnic_priv(sc)->lr_status; 2404 2405 /* 2406 * If lun reset not completed, bail out with failed. io_req 2407 * gets cleaned up during higher levels of EH 2408 */ 2409 if (status == FCPIO_INVALID_CODE) { 2410 atomic64_inc(&reset_stats->device_reset_timeouts); 2411 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2412 "Device reset timed out\n"); 2413 fnic_priv(sc)->flags |= FNIC_DEV_RST_TIMED_OUT; 2414 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2415 int_to_scsilun(sc->device->lun, &fc_lun); 2416 /* 2417 * Issue abort and terminate on device reset request. 2418 * If q'ing of terminate fails, retry it after a delay. 2419 */ 2420 while (1) { 2421 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2422 if (fnic_priv(sc)->flags & FNIC_DEV_RST_TERM_ISSUED) { 2423 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2424 break; 2425 } 2426 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2427 if (fnic_queue_abort_io_req(fnic, 2428 mqtag | FNIC_TAG_DEV_RST, 2429 FCPIO_ITMF_ABT_TASK_TERM, 2430 fc_lun.scsi_lun, io_req, hwq)) { 2431 wait_for_completion_timeout(&tm_done, 2432 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2433 } else { 2434 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2435 fnic_priv(sc)->flags |= FNIC_DEV_RST_TERM_ISSUED; 2436 fnic_priv(sc)->state = FNIC_IOREQ_ABTS_PENDING; 2437 io_req->abts_done = &tm_done; 2438 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2439 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2440 "Abort and terminate issued on Device reset mqtag 0x%x sc 0x%p\n", 2441 mqtag, sc); 2442 break; 2443 } 2444 } 2445 while (1) { 2446 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2447 if (!(fnic_priv(sc)->flags & FNIC_DEV_RST_DONE)) { 2448 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2449 wait_for_completion_timeout(&tm_done, 2450 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2451 break; 2452 } else { 2453 io_req = fnic_priv(sc)->io_req; 2454 io_req->abts_done = NULL; 2455 goto fnic_device_reset_clean; 2456 } 2457 } 2458 } else { 2459 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2460 } 2461 2462 /* Completed, but not successful, clean up the io_req, return fail */ 2463 if (status != FCPIO_SUCCESS) { 2464 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2465 FNIC_SCSI_DBG(KERN_DEBUG, 2466 fnic->lport->host, fnic->fnic_num, 2467 "Device reset completed - failed\n"); 2468 io_req = fnic_priv(sc)->io_req; 2469 goto fnic_device_reset_clean; 2470 } 2471 2472 /* 2473 * Clean up any aborts on this lun that have still not 2474 * completed. If any of these fail, then LUN reset fails. 2475 * clean_pending_aborts cleans all cmds on this lun except 2476 * the lun reset cmd. If all cmds get cleaned, the lun reset 2477 * succeeds 2478 */ 2479 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2480 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2481 io_req = fnic_priv(sc)->io_req; 2482 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2483 "Device reset failed" 2484 " since could not abort all IOs\n"); 2485 goto fnic_device_reset_clean; 2486 } 2487 2488 /* Clean lun reset command */ 2489 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2490 io_req = fnic_priv(sc)->io_req; 2491 if (io_req) 2492 /* Completed, and successful */ 2493 ret = SUCCESS; 2494 2495 fnic_device_reset_clean: 2496 if (io_req) { 2497 fnic_priv(sc)->io_req = NULL; 2498 io_req->sc = NULL; 2499 fnic->sw_copy_wq[hwq].io_req_table[blk_mq_unique_tag_to_tag(io_req->tag)] = NULL; 2500 } 2501 2502 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2503 2504 if (io_req) { 2505 start_time = io_req->start_time; 2506 fnic_release_ioreq_buf(fnic, io_req, sc); 2507 mempool_free(io_req, fnic->io_req_pool); 2508 } 2509 2510 fnic_device_reset_end: 2511 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, rq->tag, sc, 2512 jiffies_to_msecs(jiffies - start_time), 2513 0, ((u64)sc->cmnd[0] << 32 | 2514 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2515 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2516 fnic_flags_and_state(sc)); 2517 2518 if (new_sc) { 2519 fnic->sgreset_sc = NULL; 2520 mutex_unlock(&fnic->sgreset_mutex); 2521 } 2522 2523 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2524 "Returning from device reset %s\n", 2525 (ret == SUCCESS) ? 2526 "SUCCESS" : "FAILED"); 2527 2528 if (ret == FAILED) 2529 atomic64_inc(&reset_stats->device_reset_failures); 2530 2531 return ret; 2532 } 2533 2534 /* Clean up all IOs, clean up libFC local port */ 2535 int fnic_reset(struct Scsi_Host *shost) 2536 { 2537 struct fc_lport *lp; 2538 struct fnic *fnic; 2539 int ret = 0; 2540 struct reset_stats *reset_stats; 2541 2542 lp = shost_priv(shost); 2543 fnic = lport_priv(lp); 2544 reset_stats = &fnic->fnic_stats.reset_stats; 2545 2546 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 2547 "Issuing fnic reset\n"); 2548 2549 atomic64_inc(&reset_stats->fnic_resets); 2550 2551 /* 2552 * Reset local port, this will clean up libFC exchanges, 2553 * reset remote port sessions, and if link is up, begin flogi 2554 */ 2555 ret = fc_lport_reset(lp); 2556 2557 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 2558 "Returning from fnic reset with: %s\n", 2559 (ret == 0) ? "SUCCESS" : "FAILED"); 2560 2561 if (ret == 0) 2562 atomic64_inc(&reset_stats->fnic_reset_completions); 2563 else 2564 atomic64_inc(&reset_stats->fnic_reset_failures); 2565 2566 return ret; 2567 } 2568 2569 /* 2570 * SCSI Error handling calls driver's eh_host_reset if all prior 2571 * error handling levels return FAILED. If host reset completes 2572 * successfully, and if link is up, then Fabric login begins. 2573 * 2574 * Host Reset is the highest level of error recovery. If this fails, then 2575 * host is offlined by SCSI. 2576 * 2577 */ 2578 int fnic_host_reset(struct scsi_cmnd *sc) 2579 { 2580 int ret; 2581 unsigned long wait_host_tmo; 2582 struct Scsi_Host *shost = sc->device->host; 2583 struct fc_lport *lp = shost_priv(shost); 2584 struct fnic *fnic = lport_priv(lp); 2585 unsigned long flags; 2586 2587 spin_lock_irqsave(&fnic->fnic_lock, flags); 2588 if (!fnic->internal_reset_inprogress) { 2589 fnic->internal_reset_inprogress = true; 2590 } else { 2591 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2592 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2593 "host reset in progress skipping another host reset\n"); 2594 return SUCCESS; 2595 } 2596 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2597 2598 /* 2599 * If fnic_reset is successful, wait for fabric login to complete 2600 * scsi-ml tries to send a TUR to every device if host reset is 2601 * successful, so before returning to scsi, fabric should be up 2602 */ 2603 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2604 if (ret == SUCCESS) { 2605 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2606 ret = FAILED; 2607 while (time_before(jiffies, wait_host_tmo)) { 2608 if ((lp->state == LPORT_ST_READY) && 2609 (lp->link_up)) { 2610 ret = SUCCESS; 2611 break; 2612 } 2613 ssleep(1); 2614 } 2615 } 2616 2617 spin_lock_irqsave(&fnic->fnic_lock, flags); 2618 fnic->internal_reset_inprogress = false; 2619 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2620 return ret; 2621 } 2622 2623 /* 2624 * This fxn is called from libFC when host is removed 2625 */ 2626 void fnic_scsi_abort_io(struct fc_lport *lp) 2627 { 2628 int err = 0; 2629 unsigned long flags; 2630 enum fnic_state old_state; 2631 struct fnic *fnic = lport_priv(lp); 2632 DECLARE_COMPLETION_ONSTACK(remove_wait); 2633 2634 /* Issue firmware reset for fnic, wait for reset to complete */ 2635 retry_fw_reset: 2636 spin_lock_irqsave(&fnic->fnic_lock, flags); 2637 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) && 2638 fnic->link_events) { 2639 /* fw reset is in progress, poll for its completion */ 2640 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2641 schedule_timeout(msecs_to_jiffies(100)); 2642 goto retry_fw_reset; 2643 } 2644 2645 fnic->remove_wait = &remove_wait; 2646 old_state = fnic->state; 2647 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2648 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2649 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2650 2651 err = fnic_fw_reset_handler(fnic); 2652 if (err) { 2653 spin_lock_irqsave(&fnic->fnic_lock, flags); 2654 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2655 fnic->state = old_state; 2656 fnic->remove_wait = NULL; 2657 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2658 return; 2659 } 2660 2661 /* Wait for firmware reset to complete */ 2662 wait_for_completion_timeout(&remove_wait, 2663 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2664 2665 spin_lock_irqsave(&fnic->fnic_lock, flags); 2666 fnic->remove_wait = NULL; 2667 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num, 2668 "fnic_scsi_abort_io %s\n", 2669 (fnic->state == FNIC_IN_ETH_MODE) ? 2670 "SUCCESS" : "FAILED"); 2671 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2672 2673 } 2674 2675 /* 2676 * This fxn called from libFC to clean up driver IO state on link down 2677 */ 2678 void fnic_scsi_cleanup(struct fc_lport *lp) 2679 { 2680 unsigned long flags; 2681 enum fnic_state old_state; 2682 struct fnic *fnic = lport_priv(lp); 2683 2684 /* issue fw reset */ 2685 retry_fw_reset: 2686 spin_lock_irqsave(&fnic->fnic_lock, flags); 2687 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2688 /* fw reset is in progress, poll for its completion */ 2689 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2690 schedule_timeout(msecs_to_jiffies(100)); 2691 goto retry_fw_reset; 2692 } 2693 old_state = fnic->state; 2694 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2695 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2696 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2697 2698 if (fnic_fw_reset_handler(fnic)) { 2699 spin_lock_irqsave(&fnic->fnic_lock, flags); 2700 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2701 fnic->state = old_state; 2702 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2703 } 2704 2705 } 2706 2707 void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2708 { 2709 } 2710 2711 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2712 { 2713 struct fnic *fnic = lport_priv(lp); 2714 2715 /* Non-zero sid, nothing to do */ 2716 if (sid) 2717 goto call_fc_exch_mgr_reset; 2718 2719 if (did) { 2720 fnic_rport_exch_reset(fnic, did); 2721 goto call_fc_exch_mgr_reset; 2722 } 2723 2724 /* 2725 * sid = 0, did = 0 2726 * link down or device being removed 2727 */ 2728 if (!fnic->in_remove) 2729 fnic_scsi_cleanup(lp); 2730 else 2731 fnic_scsi_abort_io(lp); 2732 2733 /* call libFC exch mgr reset to reset its exchanges */ 2734 call_fc_exch_mgr_reset: 2735 fc_exch_mgr_reset(lp, sid, did); 2736 2737 } 2738 2739 static bool fnic_abts_pending_iter(struct scsi_cmnd *sc, void *data) 2740 { 2741 struct request *const rq = scsi_cmd_to_rq(sc); 2742 struct fnic_pending_aborts_iter_data *iter_data = data; 2743 struct fnic *fnic = iter_data->fnic; 2744 int cmd_state; 2745 struct fnic_io_req *io_req; 2746 unsigned long flags; 2747 uint16_t hwq = 0; 2748 int tag; 2749 2750 tag = blk_mq_unique_tag(rq); 2751 hwq = blk_mq_unique_tag_to_hwq(tag); 2752 2753 /* 2754 * ignore this lun reset cmd or cmds that do not belong to 2755 * this lun 2756 */ 2757 if (iter_data->lr_sc && sc == iter_data->lr_sc) 2758 return true; 2759 if (iter_data->lun_dev && sc->device != iter_data->lun_dev) 2760 return true; 2761 2762 spin_lock_irqsave(&fnic->wq_copy_lock[hwq], flags); 2763 2764 io_req = fnic_priv(sc)->io_req; 2765 if (!io_req) { 2766 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2767 return true; 2768 } 2769 2770 /* 2771 * Found IO that is still pending with firmware and 2772 * belongs to the LUN that we are resetting 2773 */ 2774 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num, 2775 "hwq: %d tag: 0x%x Found IO in state: %s on lun\n", 2776 hwq, tag, 2777 fnic_ioreq_state_to_str(fnic_priv(sc)->state)); 2778 cmd_state = fnic_priv(sc)->state; 2779 spin_unlock_irqrestore(&fnic->wq_copy_lock[hwq], flags); 2780 if (cmd_state == FNIC_IOREQ_ABTS_PENDING) 2781 iter_data->ret = 1; 2782 2783 return iter_data->ret ? false : true; 2784 } 2785 2786 /* 2787 * fnic_is_abts_pending() is a helper function that 2788 * walks through tag map to check if there is any IOs pending,if there is one, 2789 * then it returns 1 (true), otherwise 0 (false) 2790 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2791 * otherwise, it checks for all IOs. 2792 */ 2793 int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2794 { 2795 struct fnic_pending_aborts_iter_data iter_data = { 2796 .fnic = fnic, 2797 .lun_dev = NULL, 2798 .ret = 0, 2799 }; 2800 2801 if (lr_sc) { 2802 iter_data.lun_dev = lr_sc->device; 2803 iter_data.lr_sc = lr_sc; 2804 } 2805 2806 /* walk again to check, if IOs are still pending in fw */ 2807 scsi_host_busy_iter(fnic->lport->host, 2808 fnic_abts_pending_iter, &iter_data); 2809 2810 return iter_data.ret; 2811 } 2812