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