1/* 2 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 */ 18#include <linux/mempool.h> 19#include <linux/errno.h> 20#include <linux/init.h> 21#include <linux/workqueue.h> 22#include <linux/pci.h> 23#include <linux/scatterlist.h> 24#include <linux/skbuff.h> 25#include <linux/spinlock.h> 26#include <linux/etherdevice.h> 27#include <linux/if_ether.h> 28#include <linux/if_vlan.h> 29#include <linux/delay.h> 30#include <linux/gfp.h> 31#include <scsi/scsi.h> 32#include <scsi/scsi_host.h> 33#include <scsi/scsi_device.h> 34#include <scsi/scsi_cmnd.h> 35#include <scsi/scsi_tcq.h> 36#include <scsi/fc/fc_els.h> 37#include <scsi/fc/fc_fcoe.h> 38#include <scsi/libfc.h> 39#include <scsi/fc_frame.h> 40#include "fnic_io.h" 41#include "fnic.h" 42 43const char *fnic_state_str[] = { 44 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE", 45 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE", 46 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE", 47 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE", 48}; 49 50static const char *fnic_ioreq_state_str[] = { 51 [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED", 52 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING", 53 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING", 54 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE", 55 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE", 56}; 57 58static const char *fcpio_status_str[] = { 59 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/ 60 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER", 61 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE", 62 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]", 63 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED", 64 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND", 65 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/ 66 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT", 67 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID", 68 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID", 69 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH", 70 [FCPIO_FW_ERR] = "FCPIO_FW_ERR", 71 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED", 72 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED", 73 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN", 74 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED", 75 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL", 76 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED", 77 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND", 78}; 79 80const char *fnic_state_to_str(unsigned int state) 81{ 82 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state]) 83 return "unknown"; 84 85 return fnic_state_str[state]; 86} 87 88static const char *fnic_ioreq_state_to_str(unsigned int state) 89{ 90 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) || 91 !fnic_ioreq_state_str[state]) 92 return "unknown"; 93 94 return fnic_ioreq_state_str[state]; 95} 96 97static const char *fnic_fcpio_status_to_str(unsigned int status) 98{ 99 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status]) 100 return "unknown"; 101 102 return fcpio_status_str[status]; 103} 104 105static void fnic_cleanup_io(struct fnic *fnic, int exclude_id); 106 107static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic, 108 struct scsi_cmnd *sc) 109{ 110 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1); 111 112 return &fnic->io_req_lock[hash]; 113} 114 115static inline spinlock_t *fnic_io_lock_tag(struct fnic *fnic, 116 int tag) 117{ 118 return &fnic->io_req_lock[tag & (FNIC_IO_LOCKS - 1)]; 119} 120 121/* 122 * Unmap the data buffer and sense buffer for an io_req, 123 * also unmap and free the device-private scatter/gather list. 124 */ 125static void fnic_release_ioreq_buf(struct fnic *fnic, 126 struct fnic_io_req *io_req, 127 struct scsi_cmnd *sc) 128{ 129 if (io_req->sgl_list_pa) 130 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 131 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt, 132 DMA_TO_DEVICE); 133 scsi_dma_unmap(sc); 134 135 if (io_req->sgl_cnt) 136 mempool_free(io_req->sgl_list_alloc, 137 fnic->io_sgl_pool[io_req->sgl_type]); 138 if (io_req->sense_buf_pa) 139 dma_unmap_single(&fnic->pdev->dev, io_req->sense_buf_pa, 140 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); 141} 142 143/* Free up Copy Wq descriptors. Called with copy_wq lock held */ 144static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq) 145{ 146 /* if no Ack received from firmware, then nothing to clean */ 147 if (!fnic->fw_ack_recd[0]) 148 return 1; 149 150 /* 151 * Update desc_available count based on number of freed descriptors 152 * Account for wraparound 153 */ 154 if (wq->to_clean_index <= fnic->fw_ack_index[0]) 155 wq->ring.desc_avail += (fnic->fw_ack_index[0] 156 - wq->to_clean_index + 1); 157 else 158 wq->ring.desc_avail += (wq->ring.desc_count 159 - wq->to_clean_index 160 + fnic->fw_ack_index[0] + 1); 161 162 /* 163 * just bump clean index to ack_index+1 accounting for wraparound 164 * this will essentially free up all descriptors between 165 * to_clean_index and fw_ack_index, both inclusive 166 */ 167 wq->to_clean_index = 168 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count; 169 170 /* we have processed the acks received so far */ 171 fnic->fw_ack_recd[0] = 0; 172 return 0; 173} 174 175 176/** 177 * __fnic_set_state_flags 178 * Sets/Clears bits in fnic's state_flags 179 **/ 180void 181__fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags, 182 unsigned long clearbits) 183{ 184 unsigned long flags = 0; 185 unsigned long host_lock_flags = 0; 186 187 spin_lock_irqsave(&fnic->fnic_lock, flags); 188 spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags); 189 190 if (clearbits) 191 fnic->state_flags &= ~st_flags; 192 else 193 fnic->state_flags |= st_flags; 194 195 spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags); 196 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 197 198 return; 199} 200 201 202/* 203 * fnic_fw_reset_handler 204 * Routine to send reset msg to fw 205 */ 206int fnic_fw_reset_handler(struct fnic *fnic) 207{ 208 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 209 int ret = 0; 210 unsigned long flags; 211 212 /* indicate fwreset to io path */ 213 fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET); 214 215 skb_queue_purge(&fnic->frame_queue); 216 skb_queue_purge(&fnic->tx_queue); 217 218 /* wait for io cmpl */ 219 while (atomic_read(&fnic->in_flight)) 220 schedule_timeout(msecs_to_jiffies(1)); 221 222 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 223 224 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 225 free_wq_copy_descs(fnic, wq); 226 227 if (!vnic_wq_copy_desc_avail(wq)) 228 ret = -EAGAIN; 229 else { 230 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG); 231 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 232 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 233 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 234 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 235 atomic64_read( 236 &fnic->fnic_stats.fw_stats.active_fw_reqs)); 237 } 238 239 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 240 241 if (!ret) { 242 atomic64_inc(&fnic->fnic_stats.reset_stats.fw_resets); 243 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 244 "Issued fw reset\n"); 245 } else { 246 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 247 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 248 "Failed to issue fw reset\n"); 249 } 250 251 return ret; 252} 253 254 255/* 256 * fnic_flogi_reg_handler 257 * Routine to send flogi register msg to fw 258 */ 259int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id) 260{ 261 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 262 enum fcpio_flogi_reg_format_type format; 263 struct fc_lport *lp = fnic->lport; 264 u8 gw_mac[ETH_ALEN]; 265 int ret = 0; 266 unsigned long flags; 267 268 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 269 270 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 271 free_wq_copy_descs(fnic, wq); 272 273 if (!vnic_wq_copy_desc_avail(wq)) { 274 ret = -EAGAIN; 275 goto flogi_reg_ioreq_end; 276 } 277 278 if (fnic->ctlr.map_dest) { 279 eth_broadcast_addr(gw_mac); 280 format = FCPIO_FLOGI_REG_DEF_DEST; 281 } else { 282 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN); 283 format = FCPIO_FLOGI_REG_GW_DEST; 284 } 285 286 if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) { 287 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG, 288 fc_id, gw_mac, 289 fnic->data_src_addr, 290 lp->r_a_tov, lp->e_d_tov); 291 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 292 "FLOGI FIP reg issued fcid %x src %pM dest %pM\n", 293 fc_id, fnic->data_src_addr, gw_mac); 294 } else { 295 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG, 296 format, fc_id, gw_mac); 297 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 298 "FLOGI reg issued fcid %x map %d dest %pM\n", 299 fc_id, fnic->ctlr.map_dest, gw_mac); 300 } 301 302 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 303 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 304 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 305 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 306 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 307 308flogi_reg_ioreq_end: 309 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 310 return ret; 311} 312 313/* 314 * fnic_queue_wq_copy_desc 315 * Routine to enqueue a wq copy desc 316 */ 317static inline int fnic_queue_wq_copy_desc(struct fnic *fnic, 318 struct vnic_wq_copy *wq, 319 struct fnic_io_req *io_req, 320 struct scsi_cmnd *sc, 321 int sg_count) 322{ 323 struct scatterlist *sg; 324 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device)); 325 struct fc_rport_libfc_priv *rp = rport->dd_data; 326 struct host_sg_desc *desc; 327 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 328 unsigned int i; 329 unsigned long intr_flags; 330 int flags; 331 u8 exch_flags; 332 struct scsi_lun fc_lun; 333 334 if (sg_count) { 335 /* For each SGE, create a device desc entry */ 336 desc = io_req->sgl_list; 337 for_each_sg(scsi_sglist(sc), sg, sg_count, i) { 338 desc->addr = cpu_to_le64(sg_dma_address(sg)); 339 desc->len = cpu_to_le32(sg_dma_len(sg)); 340 desc->_resvd = 0; 341 desc++; 342 } 343 344 io_req->sgl_list_pa = dma_map_single(&fnic->pdev->dev, 345 io_req->sgl_list, 346 sizeof(io_req->sgl_list[0]) * sg_count, 347 DMA_TO_DEVICE); 348 if (dma_mapping_error(&fnic->pdev->dev, io_req->sgl_list_pa)) { 349 printk(KERN_ERR "DMA mapping failed\n"); 350 return SCSI_MLQUEUE_HOST_BUSY; 351 } 352 } 353 354 io_req->sense_buf_pa = dma_map_single(&fnic->pdev->dev, 355 sc->sense_buffer, 356 SCSI_SENSE_BUFFERSIZE, 357 DMA_FROM_DEVICE); 358 if (dma_mapping_error(&fnic->pdev->dev, io_req->sense_buf_pa)) { 359 dma_unmap_single(&fnic->pdev->dev, io_req->sgl_list_pa, 360 sizeof(io_req->sgl_list[0]) * sg_count, 361 DMA_TO_DEVICE); 362 printk(KERN_ERR "DMA mapping failed\n"); 363 return SCSI_MLQUEUE_HOST_BUSY; 364 } 365 366 int_to_scsilun(sc->device->lun, &fc_lun); 367 368 /* Enqueue the descriptor in the Copy WQ */ 369 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 370 371 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 372 free_wq_copy_descs(fnic, wq); 373 374 if (unlikely(!vnic_wq_copy_desc_avail(wq))) { 375 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 376 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 377 "fnic_queue_wq_copy_desc failure - no descriptors\n"); 378 atomic64_inc(&misc_stats->io_cpwq_alloc_failures); 379 return SCSI_MLQUEUE_HOST_BUSY; 380 } 381 382 flags = 0; 383 if (sc->sc_data_direction == DMA_FROM_DEVICE) 384 flags = FCPIO_ICMND_RDDATA; 385 else if (sc->sc_data_direction == DMA_TO_DEVICE) 386 flags = FCPIO_ICMND_WRDATA; 387 388 exch_flags = 0; 389 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) && 390 (rp->flags & FC_RP_FLAGS_RETRY)) 391 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY; 392 393 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag, 394 0, exch_flags, io_req->sgl_cnt, 395 SCSI_SENSE_BUFFERSIZE, 396 io_req->sgl_list_pa, 397 io_req->sense_buf_pa, 398 0, /* scsi cmd ref, always 0 */ 399 FCPIO_ICMND_PTA_SIMPLE, 400 /* scsi pri and tag */ 401 flags, /* command flags */ 402 sc->cmnd, sc->cmd_len, 403 scsi_bufflen(sc), 404 fc_lun.scsi_lun, io_req->port_id, 405 rport->maxframe_size, rp->r_a_tov, 406 rp->e_d_tov); 407 408 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 409 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 410 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 411 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 412 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 413 414 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 415 return 0; 416} 417 418/* 419 * fnic_queuecommand 420 * Routine to send a scsi cdb 421 * Called with host_lock held and interrupts disabled. 422 */ 423static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)) 424{ 425 struct fc_lport *lp = shost_priv(sc->device->host); 426 struct fc_rport *rport; 427 struct fnic_io_req *io_req = NULL; 428 struct fnic *fnic = lport_priv(lp); 429 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 430 struct vnic_wq_copy *wq; 431 int ret; 432 u64 cmd_trace; 433 int sg_count = 0; 434 unsigned long flags = 0; 435 unsigned long ptr; 436 spinlock_t *io_lock = NULL; 437 int io_lock_acquired = 0; 438 struct fc_rport_libfc_priv *rp; 439 440 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_IO_BLOCKED))) 441 return SCSI_MLQUEUE_HOST_BUSY; 442 443 if (unlikely(fnic_chk_state_flags_locked(fnic, FNIC_FLAGS_FWRESET))) 444 return SCSI_MLQUEUE_HOST_BUSY; 445 446 rport = starget_to_rport(scsi_target(sc->device)); 447 if (!rport) { 448 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 449 "returning DID_NO_CONNECT for IO as rport is NULL\n"); 450 sc->result = DID_NO_CONNECT << 16; 451 done(sc); 452 return 0; 453 } 454 455 ret = fc_remote_port_chkready(rport); 456 if (ret) { 457 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 458 "rport is not ready\n"); 459 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 460 sc->result = ret; 461 done(sc); 462 return 0; 463 } 464 465 rp = rport->dd_data; 466 if (!rp || rp->rp_state == RPORT_ST_DELETE) { 467 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 468 "rport 0x%x removed, returning DID_NO_CONNECT\n", 469 rport->port_id); 470 471 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 472 sc->result = DID_NO_CONNECT<<16; 473 done(sc); 474 return 0; 475 } 476 477 if (rp->rp_state != RPORT_ST_READY) { 478 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 479 "rport 0x%x in state 0x%x, returning DID_IMM_RETRY\n", 480 rport->port_id, rp->rp_state); 481 482 sc->result = DID_IMM_RETRY << 16; 483 done(sc); 484 return 0; 485 } 486 487 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 488 return SCSI_MLQUEUE_HOST_BUSY; 489 490 atomic_inc(&fnic->in_flight); 491 492 /* 493 * Release host lock, use driver resource specific locks from here. 494 * Don't re-enable interrupts in case they were disabled prior to the 495 * caller disabling them. 496 */ 497 spin_unlock(lp->host->host_lock); 498 CMD_STATE(sc) = FNIC_IOREQ_NOT_INITED; 499 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 500 501 /* Get a new io_req for this SCSI IO */ 502 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 503 if (!io_req) { 504 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 505 ret = SCSI_MLQUEUE_HOST_BUSY; 506 goto out; 507 } 508 memset(io_req, 0, sizeof(*io_req)); 509 510 /* Map the data buffer */ 511 sg_count = scsi_dma_map(sc); 512 if (sg_count < 0) { 513 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 514 sc->request->tag, sc, 0, sc->cmnd[0], 515 sg_count, CMD_STATE(sc)); 516 mempool_free(io_req, fnic->io_req_pool); 517 goto out; 518 } 519 520 /* Determine the type of scatter/gather list we need */ 521 io_req->sgl_cnt = sg_count; 522 io_req->sgl_type = FNIC_SGL_CACHE_DFLT; 523 if (sg_count > FNIC_DFLT_SG_DESC_CNT) 524 io_req->sgl_type = FNIC_SGL_CACHE_MAX; 525 526 if (sg_count) { 527 io_req->sgl_list = 528 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type], 529 GFP_ATOMIC); 530 if (!io_req->sgl_list) { 531 atomic64_inc(&fnic_stats->io_stats.alloc_failures); 532 ret = SCSI_MLQUEUE_HOST_BUSY; 533 scsi_dma_unmap(sc); 534 mempool_free(io_req, fnic->io_req_pool); 535 goto out; 536 } 537 538 /* Cache sgl list allocated address before alignment */ 539 io_req->sgl_list_alloc = io_req->sgl_list; 540 ptr = (unsigned long) io_req->sgl_list; 541 if (ptr % FNIC_SG_DESC_ALIGN) { 542 io_req->sgl_list = (struct host_sg_desc *) 543 (((unsigned long) ptr 544 + FNIC_SG_DESC_ALIGN - 1) 545 & ~(FNIC_SG_DESC_ALIGN - 1)); 546 } 547 } 548 549 /* 550 * Will acquire lock defore setting to IO initialized. 551 */ 552 553 io_lock = fnic_io_lock_hash(fnic, sc); 554 spin_lock_irqsave(io_lock, flags); 555 556 /* initialize rest of io_req */ 557 io_lock_acquired = 1; 558 io_req->port_id = rport->port_id; 559 io_req->start_time = jiffies; 560 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 561 CMD_SP(sc) = (char *)io_req; 562 CMD_FLAGS(sc) |= FNIC_IO_INITIALIZED; 563 sc->scsi_done = done; 564 565 /* create copy wq desc and enqueue it */ 566 wq = &fnic->wq_copy[0]; 567 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count); 568 if (ret) { 569 /* 570 * In case another thread cancelled the request, 571 * refetch the pointer under the lock. 572 */ 573 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 574 sc->request->tag, sc, 0, 0, 0, 575 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 576 io_req = (struct fnic_io_req *)CMD_SP(sc); 577 CMD_SP(sc) = NULL; 578 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 579 spin_unlock_irqrestore(io_lock, flags); 580 if (io_req) { 581 fnic_release_ioreq_buf(fnic, io_req, sc); 582 mempool_free(io_req, fnic->io_req_pool); 583 } 584 atomic_dec(&fnic->in_flight); 585 /* acquire host lock before returning to SCSI */ 586 spin_lock(lp->host->host_lock); 587 return ret; 588 } else { 589 atomic64_inc(&fnic_stats->io_stats.active_ios); 590 atomic64_inc(&fnic_stats->io_stats.num_ios); 591 if (atomic64_read(&fnic_stats->io_stats.active_ios) > 592 atomic64_read(&fnic_stats->io_stats.max_active_ios)) 593 atomic64_set(&fnic_stats->io_stats.max_active_ios, 594 atomic64_read(&fnic_stats->io_stats.active_ios)); 595 596 /* REVISIT: Use per IO lock in the final code */ 597 CMD_FLAGS(sc) |= FNIC_IO_ISSUED; 598 } 599out: 600 cmd_trace = ((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | 601 (u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | 602 (u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | 603 sc->cmnd[5]); 604 605 FNIC_TRACE(fnic_queuecommand, sc->device->host->host_no, 606 sc->request->tag, sc, io_req, 607 sg_count, cmd_trace, 608 (((u64)CMD_FLAGS(sc) >> 32) | CMD_STATE(sc))); 609 610 /* if only we issued IO, will we have the io lock */ 611 if (io_lock_acquired) 612 spin_unlock_irqrestore(io_lock, flags); 613 614 atomic_dec(&fnic->in_flight); 615 /* acquire host lock before returning to SCSI */ 616 spin_lock(lp->host->host_lock); 617 return ret; 618} 619 620DEF_SCSI_QCMD(fnic_queuecommand) 621 622/* 623 * fnic_fcpio_fw_reset_cmpl_handler 624 * Routine to handle fw reset completion 625 */ 626static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic, 627 struct fcpio_fw_req *desc) 628{ 629 u8 type; 630 u8 hdr_status; 631 struct fcpio_tag tag; 632 int ret = 0; 633 unsigned long flags; 634 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 635 636 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 637 638 atomic64_inc(&reset_stats->fw_reset_completions); 639 640 /* Clean up all outstanding io requests */ 641 fnic_cleanup_io(fnic, SCSI_NO_TAG); 642 643 atomic64_set(&fnic->fnic_stats.fw_stats.active_fw_reqs, 0); 644 atomic64_set(&fnic->fnic_stats.io_stats.active_ios, 0); 645 atomic64_set(&fnic->io_cmpl_skip, 0); 646 647 spin_lock_irqsave(&fnic->fnic_lock, flags); 648 649 /* fnic should be in FC_TRANS_ETH_MODE */ 650 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) { 651 /* Check status of reset completion */ 652 if (!hdr_status) { 653 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 654 "reset cmpl success\n"); 655 /* Ready to send flogi out */ 656 fnic->state = FNIC_IN_ETH_MODE; 657 } else { 658 FNIC_SCSI_DBG(KERN_DEBUG, 659 fnic->lport->host, 660 "fnic fw_reset : failed %s\n", 661 fnic_fcpio_status_to_str(hdr_status)); 662 663 /* 664 * Unable to change to eth mode, cannot send out flogi 665 * Change state to fc mode, so that subsequent Flogi 666 * requests from libFC will cause more attempts to 667 * reset the firmware. Free the cached flogi 668 */ 669 fnic->state = FNIC_IN_FC_MODE; 670 atomic64_inc(&reset_stats->fw_reset_failures); 671 ret = -1; 672 } 673 } else { 674 FNIC_SCSI_DBG(KERN_DEBUG, 675 fnic->lport->host, 676 "Unexpected state %s while processing" 677 " reset cmpl\n", fnic_state_to_str(fnic->state)); 678 atomic64_inc(&reset_stats->fw_reset_failures); 679 ret = -1; 680 } 681 682 /* Thread removing device blocks till firmware reset is complete */ 683 if (fnic->remove_wait) 684 complete(fnic->remove_wait); 685 686 /* 687 * If fnic is being removed, or fw reset failed 688 * free the flogi frame. Else, send it out 689 */ 690 if (fnic->remove_wait || ret) { 691 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 692 skb_queue_purge(&fnic->tx_queue); 693 goto reset_cmpl_handler_end; 694 } 695 696 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 697 698 fnic_flush_tx(fnic); 699 700 reset_cmpl_handler_end: 701 fnic_clear_state_flags(fnic, FNIC_FLAGS_FWRESET); 702 703 return ret; 704} 705 706/* 707 * fnic_fcpio_flogi_reg_cmpl_handler 708 * Routine to handle flogi register completion 709 */ 710static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic, 711 struct fcpio_fw_req *desc) 712{ 713 u8 type; 714 u8 hdr_status; 715 struct fcpio_tag tag; 716 int ret = 0; 717 unsigned long flags; 718 719 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 720 721 /* Update fnic state based on status of flogi reg completion */ 722 spin_lock_irqsave(&fnic->fnic_lock, flags); 723 724 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) { 725 726 /* Check flogi registration completion status */ 727 if (!hdr_status) { 728 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 729 "flog reg succeeded\n"); 730 fnic->state = FNIC_IN_FC_MODE; 731 } else { 732 FNIC_SCSI_DBG(KERN_DEBUG, 733 fnic->lport->host, 734 "fnic flogi reg :failed %s\n", 735 fnic_fcpio_status_to_str(hdr_status)); 736 fnic->state = FNIC_IN_ETH_MODE; 737 ret = -1; 738 } 739 } else { 740 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 741 "Unexpected fnic state %s while" 742 " processing flogi reg completion\n", 743 fnic_state_to_str(fnic->state)); 744 ret = -1; 745 } 746 747 if (!ret) { 748 if (fnic->stop_rx_link_events) { 749 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 750 goto reg_cmpl_handler_end; 751 } 752 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 753 754 fnic_flush_tx(fnic); 755 queue_work(fnic_event_queue, &fnic->frame_work); 756 } else { 757 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 758 } 759 760reg_cmpl_handler_end: 761 return ret; 762} 763 764static inline int is_ack_index_in_range(struct vnic_wq_copy *wq, 765 u16 request_out) 766{ 767 if (wq->to_clean_index <= wq->to_use_index) { 768 /* out of range, stale request_out index */ 769 if (request_out < wq->to_clean_index || 770 request_out >= wq->to_use_index) 771 return 0; 772 } else { 773 /* out of range, stale request_out index */ 774 if (request_out < wq->to_clean_index && 775 request_out >= wq->to_use_index) 776 return 0; 777 } 778 /* request_out index is in range */ 779 return 1; 780} 781 782 783/* 784 * Mark that ack received and store the Ack index. If there are multiple 785 * acks received before Tx thread cleans it up, the latest value will be 786 * used which is correct behavior. This state should be in the copy Wq 787 * instead of in the fnic 788 */ 789static inline void fnic_fcpio_ack_handler(struct fnic *fnic, 790 unsigned int cq_index, 791 struct fcpio_fw_req *desc) 792{ 793 struct vnic_wq_copy *wq; 794 u16 request_out = desc->u.ack.request_out; 795 unsigned long flags; 796 u64 *ox_id_tag = (u64 *)(void *)desc; 797 798 /* mark the ack state */ 799 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count]; 800 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 801 802 fnic->fnic_stats.misc_stats.last_ack_time = jiffies; 803 if (is_ack_index_in_range(wq, request_out)) { 804 fnic->fw_ack_index[0] = request_out; 805 fnic->fw_ack_recd[0] = 1; 806 } else 807 atomic64_inc( 808 &fnic->fnic_stats.misc_stats.ack_index_out_of_range); 809 810 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 811 FNIC_TRACE(fnic_fcpio_ack_handler, 812 fnic->lport->host->host_no, 0, 0, ox_id_tag[2], ox_id_tag[3], 813 ox_id_tag[4], ox_id_tag[5]); 814} 815 816/* 817 * fnic_fcpio_icmnd_cmpl_handler 818 * Routine to handle icmnd completions 819 */ 820static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, 821 struct fcpio_fw_req *desc) 822{ 823 u8 type; 824 u8 hdr_status; 825 struct fcpio_tag tag; 826 u32 id; 827 u64 xfer_len = 0; 828 struct fcpio_icmnd_cmpl *icmnd_cmpl; 829 struct fnic_io_req *io_req; 830 struct scsi_cmnd *sc; 831 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 832 unsigned long flags; 833 spinlock_t *io_lock; 834 u64 cmd_trace; 835 unsigned long start_time; 836 unsigned long io_duration_time; 837 838 /* Decode the cmpl description to get the io_req id */ 839 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 840 fcpio_tag_id_dec(&tag, &id); 841 icmnd_cmpl = &desc->u.icmnd_cmpl; 842 843 if (id >= fnic->fnic_max_tag_id) { 844 shost_printk(KERN_ERR, fnic->lport->host, 845 "Tag out of range tag %x hdr status = %s\n", 846 id, fnic_fcpio_status_to_str(hdr_status)); 847 return; 848 } 849 850 sc = scsi_host_find_tag(fnic->lport->host, id); 851 WARN_ON_ONCE(!sc); 852 if (!sc) { 853 atomic64_inc(&fnic_stats->io_stats.sc_null); 854 shost_printk(KERN_ERR, fnic->lport->host, 855 "icmnd_cmpl sc is null - " 856 "hdr status = %s tag = 0x%x desc = 0x%p\n", 857 fnic_fcpio_status_to_str(hdr_status), id, desc); 858 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 859 fnic->lport->host->host_no, id, 860 ((u64)icmnd_cmpl->_resvd0[1] << 16 | 861 (u64)icmnd_cmpl->_resvd0[0]), 862 ((u64)hdr_status << 16 | 863 (u64)icmnd_cmpl->scsi_status << 8 | 864 (u64)icmnd_cmpl->flags), desc, 865 (u64)icmnd_cmpl->residual, 0); 866 return; 867 } 868 869 io_lock = fnic_io_lock_hash(fnic, sc); 870 spin_lock_irqsave(io_lock, flags); 871 io_req = (struct fnic_io_req *)CMD_SP(sc); 872 WARN_ON_ONCE(!io_req); 873 if (!io_req) { 874 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 875 CMD_FLAGS(sc) |= FNIC_IO_REQ_NULL; 876 spin_unlock_irqrestore(io_lock, flags); 877 shost_printk(KERN_ERR, fnic->lport->host, 878 "icmnd_cmpl io_req is null - " 879 "hdr status = %s tag = 0x%x sc 0x%p\n", 880 fnic_fcpio_status_to_str(hdr_status), id, sc); 881 return; 882 } 883 start_time = io_req->start_time; 884 885 /* firmware completed the io */ 886 io_req->io_completed = 1; 887 888 /* 889 * if SCSI-ML has already issued abort on this command, 890 * set completion of the IO. The abts path will clean it up 891 */ 892 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 893 894 /* 895 * set the FNIC_IO_DONE so that this doesn't get 896 * flagged as 'out of order' if it was not aborted 897 */ 898 CMD_FLAGS(sc) |= FNIC_IO_DONE; 899 CMD_FLAGS(sc) |= FNIC_IO_ABTS_PENDING; 900 spin_unlock_irqrestore(io_lock, flags); 901 if(FCPIO_ABORTED == hdr_status) 902 CMD_FLAGS(sc) |= FNIC_IO_ABORTED; 903 904 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 905 "icmnd_cmpl abts pending " 906 "hdr status = %s tag = 0x%x sc = 0x%p " 907 "scsi_status = %x residual = %d\n", 908 fnic_fcpio_status_to_str(hdr_status), 909 id, sc, 910 icmnd_cmpl->scsi_status, 911 icmnd_cmpl->residual); 912 return; 913 } 914 915 /* Mark the IO as complete */ 916 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 917 918 icmnd_cmpl = &desc->u.icmnd_cmpl; 919 920 switch (hdr_status) { 921 case FCPIO_SUCCESS: 922 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status; 923 xfer_len = scsi_bufflen(sc); 924 scsi_set_resid(sc, icmnd_cmpl->residual); 925 926 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER) 927 xfer_len -= icmnd_cmpl->residual; 928 929 if (icmnd_cmpl->scsi_status == SAM_STAT_CHECK_CONDITION) 930 atomic64_inc(&fnic_stats->misc_stats.check_condition); 931 932 if (icmnd_cmpl->scsi_status == SAM_STAT_TASK_SET_FULL) 933 atomic64_inc(&fnic_stats->misc_stats.queue_fulls); 934 break; 935 936 case FCPIO_TIMEOUT: /* request was timed out */ 937 atomic64_inc(&fnic_stats->misc_stats.fcpio_timeout); 938 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status; 939 break; 940 941 case FCPIO_ABORTED: /* request was aborted */ 942 atomic64_inc(&fnic_stats->misc_stats.fcpio_aborted); 943 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 944 break; 945 946 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */ 947 atomic64_inc(&fnic_stats->misc_stats.data_count_mismatch); 948 scsi_set_resid(sc, icmnd_cmpl->residual); 949 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 950 break; 951 952 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */ 953 atomic64_inc(&fnic_stats->fw_stats.fw_out_of_resources); 954 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status; 955 break; 956 957 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */ 958 atomic64_inc(&fnic_stats->io_stats.io_not_found); 959 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 960 break; 961 962 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */ 963 atomic64_inc(&fnic_stats->misc_stats.sgl_invalid); 964 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 965 break; 966 967 case FCPIO_FW_ERR: /* request was terminated due fw error */ 968 atomic64_inc(&fnic_stats->fw_stats.io_fw_errs); 969 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 970 break; 971 972 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */ 973 atomic64_inc(&fnic_stats->misc_stats.mss_invalid); 974 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 975 break; 976 977 case FCPIO_INVALID_HEADER: /* header contains invalid data */ 978 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */ 979 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */ 980 default: 981 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status; 982 break; 983 } 984 985 /* Break link with the SCSI command */ 986 CMD_SP(sc) = NULL; 987 CMD_FLAGS(sc) |= FNIC_IO_DONE; 988 989 spin_unlock_irqrestore(io_lock, flags); 990 991 if (hdr_status != FCPIO_SUCCESS) { 992 atomic64_inc(&fnic_stats->io_stats.io_failures); 993 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n", 994 fnic_fcpio_status_to_str(hdr_status)); 995 } 996 997 fnic_release_ioreq_buf(fnic, io_req, sc); 998 999 mempool_free(io_req, fnic->io_req_pool); 1000 1001 cmd_trace = ((u64)hdr_status << 56) | 1002 (u64)icmnd_cmpl->scsi_status << 48 | 1003 (u64)icmnd_cmpl->flags << 40 | (u64)sc->cmnd[0] << 32 | 1004 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1005 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]; 1006 1007 FNIC_TRACE(fnic_fcpio_icmnd_cmpl_handler, 1008 sc->device->host->host_no, id, sc, 1009 ((u64)icmnd_cmpl->_resvd0[1] << 56 | 1010 (u64)icmnd_cmpl->_resvd0[0] << 48 | 1011 jiffies_to_msecs(jiffies - start_time)), 1012 desc, cmd_trace, 1013 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1014 1015 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 1016 fnic->lport->host_stats.fcp_input_requests++; 1017 fnic->fcp_input_bytes += xfer_len; 1018 } else if (sc->sc_data_direction == DMA_TO_DEVICE) { 1019 fnic->lport->host_stats.fcp_output_requests++; 1020 fnic->fcp_output_bytes += xfer_len; 1021 } else 1022 fnic->lport->host_stats.fcp_control_requests++; 1023 1024 atomic64_dec(&fnic_stats->io_stats.active_ios); 1025 if (atomic64_read(&fnic->io_cmpl_skip)) 1026 atomic64_dec(&fnic->io_cmpl_skip); 1027 else 1028 atomic64_inc(&fnic_stats->io_stats.io_completions); 1029 1030 1031 io_duration_time = jiffies_to_msecs(jiffies) - 1032 jiffies_to_msecs(start_time); 1033 1034 if(io_duration_time <= 10) 1035 atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); 1036 else if(io_duration_time <= 100) 1037 atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec); 1038 else if(io_duration_time <= 500) 1039 atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec); 1040 else if(io_duration_time <= 5000) 1041 atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec); 1042 else if(io_duration_time <= 10000) 1043 atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec); 1044 else if(io_duration_time <= 30000) 1045 atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec); 1046 else { 1047 atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec); 1048 1049 if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time)) 1050 atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time); 1051 } 1052 1053 /* Call SCSI completion function to complete the IO */ 1054 if (sc->scsi_done) 1055 sc->scsi_done(sc); 1056} 1057 1058/* fnic_fcpio_itmf_cmpl_handler 1059 * Routine to handle itmf completions 1060 */ 1061static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic, 1062 struct fcpio_fw_req *desc) 1063{ 1064 u8 type; 1065 u8 hdr_status; 1066 struct fcpio_tag tag; 1067 u32 id; 1068 struct scsi_cmnd *sc; 1069 struct fnic_io_req *io_req; 1070 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1071 struct abort_stats *abts_stats = &fnic->fnic_stats.abts_stats; 1072 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1073 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1074 unsigned long flags; 1075 spinlock_t *io_lock; 1076 unsigned long start_time; 1077 1078 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag); 1079 fcpio_tag_id_dec(&tag, &id); 1080 1081 if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) { 1082 shost_printk(KERN_ERR, fnic->lport->host, 1083 "Tag out of range tag %x hdr status = %s\n", 1084 id, fnic_fcpio_status_to_str(hdr_status)); 1085 return; 1086 } 1087 1088 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK); 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), id); 1095 return; 1096 } 1097 io_lock = fnic_io_lock_hash(fnic, sc); 1098 spin_lock_irqsave(io_lock, flags); 1099 io_req = (struct fnic_io_req *)CMD_SP(sc); 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 CMD_FLAGS(sc) |= 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), id, 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 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 1120 CMD_ABTS_STATUS(sc) = hdr_status; 1121 CMD_FLAGS(sc) |= 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 (CMD_FLAGS(sc) & 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 (CMD_FLAGS(sc) & 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 (CMD_FLAGS(sc) & 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 (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) { 1158 /* This is a late completion. Ignore it */ 1159 spin_unlock_irqrestore(io_lock, flags); 1160 return; 1161 } 1162 1163 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 1164 CMD_ABTS_STATUS(sc) = hdr_status; 1165 1166 /* If the status is IO not found consider it as success */ 1167 if (hdr_status == FCPIO_IO_NOT_FOUND) 1168 CMD_ABTS_STATUS(sc) = FCPIO_SUCCESS; 1169 1170 if (!(CMD_FLAGS(sc) & (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 CMD_SP(sc) = 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 if (sc->scsi_done) { 1197 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1198 sc->device->host->host_no, id, 1199 sc, 1200 jiffies_to_msecs(jiffies - start_time), 1201 desc, 1202 (((u64)hdr_status << 40) | 1203 (u64)sc->cmnd[0] << 32 | 1204 (u64)sc->cmnd[2] << 24 | 1205 (u64)sc->cmnd[3] << 16 | 1206 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1207 (((u64)CMD_FLAGS(sc) << 32) | 1208 CMD_STATE(sc))); 1209 sc->scsi_done(sc); 1210 atomic64_dec(&fnic_stats->io_stats.active_ios); 1211 if (atomic64_read(&fnic->io_cmpl_skip)) 1212 atomic64_dec(&fnic->io_cmpl_skip); 1213 else 1214 atomic64_inc(&fnic_stats->io_stats.io_completions); 1215 } 1216 } 1217 1218 } else if (id & FNIC_TAG_DEV_RST) { 1219 /* Completion of device reset */ 1220 CMD_LR_STATUS(sc) = hdr_status; 1221 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1222 spin_unlock_irqrestore(io_lock, flags); 1223 CMD_FLAGS(sc) |= FNIC_DEV_RST_ABTS_PENDING; 1224 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1225 sc->device->host->host_no, id, sc, 1226 jiffies_to_msecs(jiffies - start_time), 1227 desc, 0, 1228 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1229 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1230 "Terminate pending " 1231 "dev reset cmpl recd. id %d status %s\n", 1232 (int)(id & FNIC_TAG_MASK), 1233 fnic_fcpio_status_to_str(hdr_status)); 1234 return; 1235 } 1236 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TIMED_OUT) { 1237 /* Need to wait for terminate completion */ 1238 spin_unlock_irqrestore(io_lock, flags); 1239 FNIC_TRACE(fnic_fcpio_itmf_cmpl_handler, 1240 sc->device->host->host_no, id, sc, 1241 jiffies_to_msecs(jiffies - start_time), 1242 desc, 0, 1243 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1244 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1245 "dev reset cmpl recd after time out. " 1246 "id %d status %s\n", 1247 (int)(id & FNIC_TAG_MASK), 1248 fnic_fcpio_status_to_str(hdr_status)); 1249 return; 1250 } 1251 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE; 1252 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1253 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1254 "dev reset cmpl recd. id %d status %s\n", 1255 (int)(id & FNIC_TAG_MASK), 1256 fnic_fcpio_status_to_str(hdr_status)); 1257 if (io_req->dr_done) 1258 complete(io_req->dr_done); 1259 spin_unlock_irqrestore(io_lock, flags); 1260 1261 } else { 1262 shost_printk(KERN_ERR, fnic->lport->host, 1263 "Unexpected itmf io state %s tag %x\n", 1264 fnic_ioreq_state_to_str(CMD_STATE(sc)), id); 1265 spin_unlock_irqrestore(io_lock, flags); 1266 } 1267 1268} 1269 1270/* 1271 * fnic_fcpio_cmpl_handler 1272 * Routine to service the cq for wq_copy 1273 */ 1274static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev, 1275 unsigned int cq_index, 1276 struct fcpio_fw_req *desc) 1277{ 1278 struct fnic *fnic = vnic_dev_priv(vdev); 1279 1280 switch (desc->hdr.type) { 1281 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1282 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1283 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1284 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1285 case FCPIO_RESET_CMPL: /* fw completed reset */ 1286 atomic64_dec(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1287 break; 1288 default: 1289 break; 1290 } 1291 1292 switch (desc->hdr.type) { 1293 case FCPIO_ACK: /* fw copied copy wq desc to its queue */ 1294 fnic_fcpio_ack_handler(fnic, cq_index, desc); 1295 break; 1296 1297 case FCPIO_ICMND_CMPL: /* fw completed a command */ 1298 fnic_fcpio_icmnd_cmpl_handler(fnic, desc); 1299 break; 1300 1301 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/ 1302 fnic_fcpio_itmf_cmpl_handler(fnic, desc); 1303 break; 1304 1305 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */ 1306 case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */ 1307 fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc); 1308 break; 1309 1310 case FCPIO_RESET_CMPL: /* fw completed reset */ 1311 fnic_fcpio_fw_reset_cmpl_handler(fnic, desc); 1312 break; 1313 1314 default: 1315 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1316 "firmware completion type %d\n", 1317 desc->hdr.type); 1318 break; 1319 } 1320 1321 return 0; 1322} 1323 1324/* 1325 * fnic_wq_copy_cmpl_handler 1326 * Routine to process wq copy 1327 */ 1328int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do) 1329{ 1330 unsigned int wq_work_done = 0; 1331 unsigned int i, cq_index; 1332 unsigned int cur_work_done; 1333 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1334 u64 start_jiffies = 0; 1335 u64 end_jiffies = 0; 1336 u64 delta_jiffies = 0; 1337 u64 delta_ms = 0; 1338 1339 for (i = 0; i < fnic->wq_copy_count; i++) { 1340 cq_index = i + fnic->raw_wq_count + fnic->rq_count; 1341 1342 start_jiffies = jiffies; 1343 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index], 1344 fnic_fcpio_cmpl_handler, 1345 copy_work_to_do); 1346 end_jiffies = jiffies; 1347 1348 wq_work_done += cur_work_done; 1349 delta_jiffies = end_jiffies - start_jiffies; 1350 if (delta_jiffies > 1351 (u64) atomic64_read(&misc_stats->max_isr_jiffies)) { 1352 atomic64_set(&misc_stats->max_isr_jiffies, 1353 delta_jiffies); 1354 delta_ms = jiffies_to_msecs(delta_jiffies); 1355 atomic64_set(&misc_stats->max_isr_time_ms, delta_ms); 1356 atomic64_set(&misc_stats->corr_work_done, 1357 cur_work_done); 1358 } 1359 } 1360 return wq_work_done; 1361} 1362 1363static void fnic_cleanup_io(struct fnic *fnic, int exclude_id) 1364{ 1365 int i; 1366 struct fnic_io_req *io_req; 1367 unsigned long flags = 0; 1368 struct scsi_cmnd *sc; 1369 spinlock_t *io_lock; 1370 unsigned long start_time = 0; 1371 struct fnic_stats *fnic_stats = &fnic->fnic_stats; 1372 1373 for (i = 0; i < fnic->fnic_max_tag_id; i++) { 1374 if (i == exclude_id) 1375 continue; 1376 1377 io_lock = fnic_io_lock_tag(fnic, i); 1378 spin_lock_irqsave(io_lock, flags); 1379 sc = scsi_host_find_tag(fnic->lport->host, i); 1380 if (!sc) { 1381 spin_unlock_irqrestore(io_lock, flags); 1382 continue; 1383 } 1384 1385 io_req = (struct fnic_io_req *)CMD_SP(sc); 1386 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1387 !(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 1388 /* 1389 * We will be here only when FW completes reset 1390 * without sending completions for outstanding ios. 1391 */ 1392 CMD_FLAGS(sc) |= FNIC_DEV_RST_DONE; 1393 if (io_req && io_req->dr_done) 1394 complete(io_req->dr_done); 1395 else if (io_req && io_req->abts_done) 1396 complete(io_req->abts_done); 1397 spin_unlock_irqrestore(io_lock, flags); 1398 continue; 1399 } else if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1400 spin_unlock_irqrestore(io_lock, flags); 1401 continue; 1402 } 1403 if (!io_req) { 1404 spin_unlock_irqrestore(io_lock, flags); 1405 continue; 1406 } 1407 1408 CMD_SP(sc) = NULL; 1409 1410 spin_unlock_irqrestore(io_lock, flags); 1411 1412 /* 1413 * If there is a scsi_cmnd associated with this io_req, then 1414 * free the corresponding state 1415 */ 1416 start_time = io_req->start_time; 1417 fnic_release_ioreq_buf(fnic, io_req, sc); 1418 mempool_free(io_req, fnic->io_req_pool); 1419 1420 sc->result = DID_TRANSPORT_DISRUPTED << 16; 1421 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1422 "%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n", 1423 __func__, sc->request->tag, sc, 1424 (jiffies - start_time)); 1425 1426 if (atomic64_read(&fnic->io_cmpl_skip)) 1427 atomic64_dec(&fnic->io_cmpl_skip); 1428 else 1429 atomic64_inc(&fnic_stats->io_stats.io_completions); 1430 1431 /* Complete the command to SCSI */ 1432 if (sc->scsi_done) { 1433 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) 1434 shost_printk(KERN_ERR, fnic->lport->host, 1435 "Calling done for IO not issued to fw: tag:0x%x sc:0x%p\n", 1436 sc->request->tag, sc); 1437 1438 FNIC_TRACE(fnic_cleanup_io, 1439 sc->device->host->host_no, i, sc, 1440 jiffies_to_msecs(jiffies - start_time), 1441 0, ((u64)sc->cmnd[0] << 32 | 1442 (u64)sc->cmnd[2] << 24 | 1443 (u64)sc->cmnd[3] << 16 | 1444 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1445 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1446 1447 sc->scsi_done(sc); 1448 } 1449 } 1450} 1451 1452void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq, 1453 struct fcpio_host_req *desc) 1454{ 1455 u32 id; 1456 struct fnic *fnic = vnic_dev_priv(wq->vdev); 1457 struct fnic_io_req *io_req; 1458 struct scsi_cmnd *sc; 1459 unsigned long flags; 1460 spinlock_t *io_lock; 1461 unsigned long start_time = 0; 1462 1463 /* get the tag reference */ 1464 fcpio_tag_id_dec(&desc->hdr.tag, &id); 1465 id &= FNIC_TAG_MASK; 1466 1467 if (id >= fnic->fnic_max_tag_id) 1468 return; 1469 1470 sc = scsi_host_find_tag(fnic->lport->host, id); 1471 if (!sc) 1472 return; 1473 1474 io_lock = fnic_io_lock_hash(fnic, sc); 1475 spin_lock_irqsave(io_lock, flags); 1476 1477 /* Get the IO context which this desc refers to */ 1478 io_req = (struct fnic_io_req *)CMD_SP(sc); 1479 1480 /* fnic interrupts are turned off by now */ 1481 1482 if (!io_req) { 1483 spin_unlock_irqrestore(io_lock, flags); 1484 goto wq_copy_cleanup_scsi_cmd; 1485 } 1486 1487 CMD_SP(sc) = NULL; 1488 1489 spin_unlock_irqrestore(io_lock, flags); 1490 1491 start_time = io_req->start_time; 1492 fnic_release_ioreq_buf(fnic, io_req, sc); 1493 mempool_free(io_req, fnic->io_req_pool); 1494 1495wq_copy_cleanup_scsi_cmd: 1496 sc->result = DID_NO_CONNECT << 16; 1497 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:" 1498 " DID_NO_CONNECT\n"); 1499 1500 if (sc->scsi_done) { 1501 FNIC_TRACE(fnic_wq_copy_cleanup_handler, 1502 sc->device->host->host_no, id, sc, 1503 jiffies_to_msecs(jiffies - start_time), 1504 0, ((u64)sc->cmnd[0] << 32 | 1505 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 1506 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 1507 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 1508 1509 sc->scsi_done(sc); 1510 } 1511} 1512 1513static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag, 1514 u32 task_req, u8 *fc_lun, 1515 struct fnic_io_req *io_req) 1516{ 1517 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 1518 struct Scsi_Host *host = fnic->lport->host; 1519 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 1520 unsigned long flags; 1521 1522 spin_lock_irqsave(host->host_lock, flags); 1523 if (unlikely(fnic_chk_state_flags_locked(fnic, 1524 FNIC_FLAGS_IO_BLOCKED))) { 1525 spin_unlock_irqrestore(host->host_lock, flags); 1526 return 1; 1527 } else 1528 atomic_inc(&fnic->in_flight); 1529 spin_unlock_irqrestore(host->host_lock, flags); 1530 1531 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags); 1532 1533 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 1534 free_wq_copy_descs(fnic, wq); 1535 1536 if (!vnic_wq_copy_desc_avail(wq)) { 1537 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1538 atomic_dec(&fnic->in_flight); 1539 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1540 "fnic_queue_abort_io_req: failure: no descriptors\n"); 1541 atomic64_inc(&misc_stats->abts_cpwq_alloc_failures); 1542 return 1; 1543 } 1544 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT, 1545 0, task_req, tag, fc_lun, io_req->port_id, 1546 fnic->config.ra_tov, fnic->config.ed_tov); 1547 1548 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 1549 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 1550 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 1551 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 1552 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 1553 1554 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags); 1555 atomic_dec(&fnic->in_flight); 1556 1557 return 0; 1558} 1559 1560static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id) 1561{ 1562 int tag; 1563 int abt_tag; 1564 int term_cnt = 0; 1565 struct fnic_io_req *io_req; 1566 spinlock_t *io_lock; 1567 unsigned long flags; 1568 struct scsi_cmnd *sc; 1569 struct reset_stats *reset_stats = &fnic->fnic_stats.reset_stats; 1570 struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats; 1571 struct scsi_lun fc_lun; 1572 enum fnic_ioreq_state old_ioreq_state; 1573 1574 FNIC_SCSI_DBG(KERN_DEBUG, 1575 fnic->lport->host, 1576 "fnic_rport_exch_reset called portid 0x%06x\n", 1577 port_id); 1578 1579 if (fnic->in_remove) 1580 return; 1581 1582 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1583 abt_tag = tag; 1584 io_lock = fnic_io_lock_tag(fnic, tag); 1585 spin_lock_irqsave(io_lock, flags); 1586 sc = scsi_host_find_tag(fnic->lport->host, tag); 1587 if (!sc) { 1588 spin_unlock_irqrestore(io_lock, flags); 1589 continue; 1590 } 1591 1592 io_req = (struct fnic_io_req *)CMD_SP(sc); 1593 1594 if (!io_req || io_req->port_id != port_id) { 1595 spin_unlock_irqrestore(io_lock, flags); 1596 continue; 1597 } 1598 1599 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1600 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1601 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1602 "fnic_rport_exch_reset dev rst not pending sc 0x%p\n", 1603 sc); 1604 spin_unlock_irqrestore(io_lock, flags); 1605 continue; 1606 } 1607 1608 /* 1609 * Found IO that is still pending with firmware and 1610 * belongs to rport that went away 1611 */ 1612 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1613 spin_unlock_irqrestore(io_lock, flags); 1614 continue; 1615 } 1616 if (io_req->abts_done) { 1617 shost_printk(KERN_ERR, fnic->lport->host, 1618 "fnic_rport_exch_reset: io_req->abts_done is set " 1619 "state is %s\n", 1620 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1621 } 1622 1623 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1624 shost_printk(KERN_ERR, fnic->lport->host, 1625 "rport_exch_reset " 1626 "IO not yet issued %p tag 0x%x flags " 1627 "%x state %d\n", 1628 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1629 } 1630 old_ioreq_state = CMD_STATE(sc); 1631 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1632 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1633 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1634 atomic64_inc(&reset_stats->device_reset_terminates); 1635 abt_tag = (tag | FNIC_TAG_DEV_RST); 1636 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1637 "fnic_rport_exch_reset dev rst sc 0x%p\n", 1638 sc); 1639 } 1640 1641 BUG_ON(io_req->abts_done); 1642 1643 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1644 "fnic_rport_reset_exch: Issuing abts\n"); 1645 1646 spin_unlock_irqrestore(io_lock, flags); 1647 1648 /* Now queue the abort command to firmware */ 1649 int_to_scsilun(sc->device->lun, &fc_lun); 1650 1651 if (fnic_queue_abort_io_req(fnic, abt_tag, 1652 FCPIO_ITMF_ABT_TASK_TERM, 1653 fc_lun.scsi_lun, io_req)) { 1654 /* 1655 * Revert the cmd state back to old state, if 1656 * it hasn't changed in between. This cmd will get 1657 * aborted later by scsi_eh, or cleaned up during 1658 * lun reset 1659 */ 1660 spin_lock_irqsave(io_lock, flags); 1661 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1662 CMD_STATE(sc) = old_ioreq_state; 1663 spin_unlock_irqrestore(io_lock, flags); 1664 } else { 1665 spin_lock_irqsave(io_lock, flags); 1666 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1667 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1668 else 1669 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1670 spin_unlock_irqrestore(io_lock, flags); 1671 atomic64_inc(&term_stats->terminates); 1672 term_cnt++; 1673 } 1674 } 1675 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1676 atomic64_set(&term_stats->max_terminates, term_cnt); 1677 1678} 1679 1680void fnic_terminate_rport_io(struct fc_rport *rport) 1681{ 1682 int tag; 1683 int abt_tag; 1684 int term_cnt = 0; 1685 struct fnic_io_req *io_req; 1686 spinlock_t *io_lock; 1687 unsigned long flags; 1688 struct scsi_cmnd *sc; 1689 struct scsi_lun fc_lun; 1690 struct fc_rport_libfc_priv *rdata; 1691 struct fc_lport *lport; 1692 struct fnic *fnic; 1693 struct fc_rport *cmd_rport; 1694 struct reset_stats *reset_stats; 1695 struct terminate_stats *term_stats; 1696 enum fnic_ioreq_state old_ioreq_state; 1697 1698 if (!rport) { 1699 printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n"); 1700 return; 1701 } 1702 rdata = rport->dd_data; 1703 1704 if (!rdata) { 1705 printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n"); 1706 return; 1707 } 1708 lport = rdata->local_port; 1709 1710 if (!lport) { 1711 printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n"); 1712 return; 1713 } 1714 fnic = lport_priv(lport); 1715 FNIC_SCSI_DBG(KERN_DEBUG, 1716 fnic->lport->host, "fnic_terminate_rport_io called" 1717 " wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n", 1718 rport->port_name, rport->node_name, rport, 1719 rport->port_id); 1720 1721 if (fnic->in_remove) 1722 return; 1723 1724 reset_stats = &fnic->fnic_stats.reset_stats; 1725 term_stats = &fnic->fnic_stats.term_stats; 1726 1727 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 1728 abt_tag = tag; 1729 io_lock = fnic_io_lock_tag(fnic, tag); 1730 spin_lock_irqsave(io_lock, flags); 1731 sc = scsi_host_find_tag(fnic->lport->host, tag); 1732 if (!sc) { 1733 spin_unlock_irqrestore(io_lock, flags); 1734 continue; 1735 } 1736 1737 cmd_rport = starget_to_rport(scsi_target(sc->device)); 1738 if (rport != cmd_rport) { 1739 spin_unlock_irqrestore(io_lock, flags); 1740 continue; 1741 } 1742 1743 io_req = (struct fnic_io_req *)CMD_SP(sc); 1744 1745 if (!io_req || rport != cmd_rport) { 1746 spin_unlock_irqrestore(io_lock, flags); 1747 continue; 1748 } 1749 1750 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 1751 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 1752 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1753 "fnic_terminate_rport_io dev rst not pending sc 0x%p\n", 1754 sc); 1755 spin_unlock_irqrestore(io_lock, flags); 1756 continue; 1757 } 1758 /* 1759 * Found IO that is still pending with firmware and 1760 * belongs to rport that went away 1761 */ 1762 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1763 spin_unlock_irqrestore(io_lock, flags); 1764 continue; 1765 } 1766 if (io_req->abts_done) { 1767 shost_printk(KERN_ERR, fnic->lport->host, 1768 "fnic_terminate_rport_io: io_req->abts_done is set " 1769 "state is %s\n", 1770 fnic_ioreq_state_to_str(CMD_STATE(sc))); 1771 } 1772 if (!(CMD_FLAGS(sc) & FNIC_IO_ISSUED)) { 1773 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1774 "fnic_terminate_rport_io " 1775 "IO not yet issued %p tag 0x%x flags " 1776 "%x state %d\n", 1777 sc, tag, CMD_FLAGS(sc), CMD_STATE(sc)); 1778 } 1779 old_ioreq_state = CMD_STATE(sc); 1780 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1781 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1782 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 1783 atomic64_inc(&reset_stats->device_reset_terminates); 1784 abt_tag = (tag | FNIC_TAG_DEV_RST); 1785 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 1786 "fnic_terminate_rport_io dev rst sc 0x%p\n", sc); 1787 } 1788 1789 BUG_ON(io_req->abts_done); 1790 1791 FNIC_SCSI_DBG(KERN_DEBUG, 1792 fnic->lport->host, 1793 "fnic_terminate_rport_io: Issuing abts\n"); 1794 1795 spin_unlock_irqrestore(io_lock, flags); 1796 1797 /* Now queue the abort command to firmware */ 1798 int_to_scsilun(sc->device->lun, &fc_lun); 1799 1800 if (fnic_queue_abort_io_req(fnic, abt_tag, 1801 FCPIO_ITMF_ABT_TASK_TERM, 1802 fc_lun.scsi_lun, io_req)) { 1803 /* 1804 * Revert the cmd state back to old state, if 1805 * it hasn't changed in between. This cmd will get 1806 * aborted later by scsi_eh, or cleaned up during 1807 * lun reset 1808 */ 1809 spin_lock_irqsave(io_lock, flags); 1810 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1811 CMD_STATE(sc) = old_ioreq_state; 1812 spin_unlock_irqrestore(io_lock, flags); 1813 } else { 1814 spin_lock_irqsave(io_lock, flags); 1815 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 1816 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 1817 else 1818 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 1819 spin_unlock_irqrestore(io_lock, flags); 1820 atomic64_inc(&term_stats->terminates); 1821 term_cnt++; 1822 } 1823 } 1824 if (term_cnt > atomic64_read(&term_stats->max_terminates)) 1825 atomic64_set(&term_stats->max_terminates, term_cnt); 1826 1827} 1828 1829/* 1830 * This function is exported to SCSI for sending abort cmnds. 1831 * A SCSI IO is represented by a io_req in the driver. 1832 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO. 1833 */ 1834int fnic_abort_cmd(struct scsi_cmnd *sc) 1835{ 1836 struct fc_lport *lp; 1837 struct fnic *fnic; 1838 struct fnic_io_req *io_req = NULL; 1839 struct fc_rport *rport; 1840 spinlock_t *io_lock; 1841 unsigned long flags; 1842 unsigned long start_time = 0; 1843 int ret = SUCCESS; 1844 u32 task_req = 0; 1845 struct scsi_lun fc_lun; 1846 struct fnic_stats *fnic_stats; 1847 struct abort_stats *abts_stats; 1848 struct terminate_stats *term_stats; 1849 enum fnic_ioreq_state old_ioreq_state; 1850 int tag; 1851 unsigned long abt_issued_time; 1852 DECLARE_COMPLETION_ONSTACK(tm_done); 1853 1854 /* Wait for rport to unblock */ 1855 fc_block_scsi_eh(sc); 1856 1857 /* Get local-port, check ready and link up */ 1858 lp = shost_priv(sc->device->host); 1859 1860 fnic = lport_priv(lp); 1861 fnic_stats = &fnic->fnic_stats; 1862 abts_stats = &fnic->fnic_stats.abts_stats; 1863 term_stats = &fnic->fnic_stats.term_stats; 1864 1865 rport = starget_to_rport(scsi_target(sc->device)); 1866 tag = sc->request->tag; 1867 FNIC_SCSI_DBG(KERN_DEBUG, 1868 fnic->lport->host, 1869 "Abort Cmd called FCID 0x%x, LUN 0x%llx TAG %x flags %x\n", 1870 rport->port_id, sc->device->lun, tag, CMD_FLAGS(sc)); 1871 1872 CMD_FLAGS(sc) = FNIC_NO_FLAGS; 1873 1874 if (lp->state != LPORT_ST_READY || !(lp->link_up)) { 1875 ret = FAILED; 1876 goto fnic_abort_cmd_end; 1877 } 1878 1879 /* 1880 * Avoid a race between SCSI issuing the abort and the device 1881 * completing the command. 1882 * 1883 * If the command is already completed by the fw cmpl code, 1884 * we just return SUCCESS from here. This means that the abort 1885 * succeeded. In the SCSI ML, since the timeout for command has 1886 * happened, the completion wont actually complete the command 1887 * and it will be considered as an aborted command 1888 * 1889 * The CMD_SP will not be cleared except while holding io_req_lock. 1890 */ 1891 io_lock = fnic_io_lock_hash(fnic, sc); 1892 spin_lock_irqsave(io_lock, flags); 1893 io_req = (struct fnic_io_req *)CMD_SP(sc); 1894 if (!io_req) { 1895 spin_unlock_irqrestore(io_lock, flags); 1896 goto fnic_abort_cmd_end; 1897 } 1898 1899 io_req->abts_done = &tm_done; 1900 1901 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 1902 spin_unlock_irqrestore(io_lock, flags); 1903 goto wait_pending; 1904 } 1905 1906 abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); 1907 if (abt_issued_time <= 6000) 1908 atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec); 1909 else if (abt_issued_time > 6000 && abt_issued_time <= 20000) 1910 atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec); 1911 else if (abt_issued_time > 20000 && abt_issued_time <= 30000) 1912 atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec); 1913 else if (abt_issued_time > 30000 && abt_issued_time <= 40000) 1914 atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec); 1915 else if (abt_issued_time > 40000 && abt_issued_time <= 50000) 1916 atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec); 1917 else if (abt_issued_time > 50000 && abt_issued_time <= 60000) 1918 atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec); 1919 else 1920 atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec); 1921 1922 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 1923 "CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time); 1924 /* 1925 * Command is still pending, need to abort it 1926 * If the firmware completes the command after this point, 1927 * the completion wont be done till mid-layer, since abort 1928 * has already started. 1929 */ 1930 old_ioreq_state = CMD_STATE(sc); 1931 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 1932 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 1933 1934 spin_unlock_irqrestore(io_lock, flags); 1935 1936 /* 1937 * Check readiness of the remote port. If the path to remote 1938 * port is up, then send abts to the remote port to terminate 1939 * the IO. Else, just locally terminate the IO in the firmware 1940 */ 1941 if (fc_remote_port_chkready(rport) == 0) 1942 task_req = FCPIO_ITMF_ABT_TASK; 1943 else { 1944 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 1945 task_req = FCPIO_ITMF_ABT_TASK_TERM; 1946 } 1947 1948 /* Now queue the abort command to firmware */ 1949 int_to_scsilun(sc->device->lun, &fc_lun); 1950 1951 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req, 1952 fc_lun.scsi_lun, io_req)) { 1953 spin_lock_irqsave(io_lock, flags); 1954 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 1955 CMD_STATE(sc) = old_ioreq_state; 1956 io_req = (struct fnic_io_req *)CMD_SP(sc); 1957 if (io_req) 1958 io_req->abts_done = NULL; 1959 spin_unlock_irqrestore(io_lock, flags); 1960 ret = FAILED; 1961 goto fnic_abort_cmd_end; 1962 } 1963 if (task_req == FCPIO_ITMF_ABT_TASK) { 1964 CMD_FLAGS(sc) |= FNIC_IO_ABTS_ISSUED; 1965 atomic64_inc(&fnic_stats->abts_stats.aborts); 1966 } else { 1967 CMD_FLAGS(sc) |= FNIC_IO_TERM_ISSUED; 1968 atomic64_inc(&fnic_stats->term_stats.terminates); 1969 } 1970 1971 /* 1972 * We queued an abort IO, wait for its completion. 1973 * Once the firmware completes the abort command, it will 1974 * wake up this thread. 1975 */ 1976 wait_pending: 1977 wait_for_completion_timeout(&tm_done, 1978 msecs_to_jiffies 1979 (2 * fnic->config.ra_tov + 1980 fnic->config.ed_tov)); 1981 1982 /* Check the abort status */ 1983 spin_lock_irqsave(io_lock, flags); 1984 1985 io_req = (struct fnic_io_req *)CMD_SP(sc); 1986 if (!io_req) { 1987 atomic64_inc(&fnic_stats->io_stats.ioreq_null); 1988 spin_unlock_irqrestore(io_lock, flags); 1989 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 1990 ret = FAILED; 1991 goto fnic_abort_cmd_end; 1992 } 1993 io_req->abts_done = NULL; 1994 1995 /* fw did not complete abort, timed out */ 1996 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 1997 spin_unlock_irqrestore(io_lock, flags); 1998 if (task_req == FCPIO_ITMF_ABT_TASK) { 1999 atomic64_inc(&abts_stats->abort_drv_timeouts); 2000 } else { 2001 atomic64_inc(&term_stats->terminate_drv_timeouts); 2002 } 2003 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_TIMED_OUT; 2004 ret = FAILED; 2005 goto fnic_abort_cmd_end; 2006 } 2007 2008 /* IO out of order */ 2009 2010 if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) { 2011 spin_unlock_irqrestore(io_lock, flags); 2012 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2013 "Issuing Host reset due to out of order IO\n"); 2014 2015 ret = FAILED; 2016 goto fnic_abort_cmd_end; 2017 } 2018 2019 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2020 2021 start_time = io_req->start_time; 2022 /* 2023 * firmware completed the abort, check the status, 2024 * free the io_req if successful. If abort fails, 2025 * Device reset will clean the I/O. 2026 */ 2027 if (CMD_ABTS_STATUS(sc) == FCPIO_SUCCESS) 2028 CMD_SP(sc) = NULL; 2029 else { 2030 ret = FAILED; 2031 spin_unlock_irqrestore(io_lock, flags); 2032 goto fnic_abort_cmd_end; 2033 } 2034 2035 spin_unlock_irqrestore(io_lock, flags); 2036 2037 fnic_release_ioreq_buf(fnic, io_req, sc); 2038 mempool_free(io_req, fnic->io_req_pool); 2039 2040 if (sc->scsi_done) { 2041 /* Call SCSI completion function to complete the IO */ 2042 sc->result = (DID_ABORT << 16); 2043 sc->scsi_done(sc); 2044 atomic64_dec(&fnic_stats->io_stats.active_ios); 2045 if (atomic64_read(&fnic->io_cmpl_skip)) 2046 atomic64_dec(&fnic->io_cmpl_skip); 2047 else 2048 atomic64_inc(&fnic_stats->io_stats.io_completions); 2049 } 2050 2051fnic_abort_cmd_end: 2052 FNIC_TRACE(fnic_abort_cmd, sc->device->host->host_no, 2053 sc->request->tag, sc, 2054 jiffies_to_msecs(jiffies - start_time), 2055 0, ((u64)sc->cmnd[0] << 32 | 2056 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2057 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2058 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2059 2060 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2061 "Returning from abort cmd type %x %s\n", task_req, 2062 (ret == SUCCESS) ? 2063 "SUCCESS" : "FAILED"); 2064 return ret; 2065} 2066 2067static inline int fnic_queue_dr_io_req(struct fnic *fnic, 2068 struct scsi_cmnd *sc, 2069 struct fnic_io_req *io_req) 2070{ 2071 struct vnic_wq_copy *wq = &fnic->wq_copy[0]; 2072 struct Scsi_Host *host = fnic->lport->host; 2073 struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats; 2074 struct scsi_lun fc_lun; 2075 int ret = 0; 2076 unsigned long intr_flags; 2077 2078 spin_lock_irqsave(host->host_lock, intr_flags); 2079 if (unlikely(fnic_chk_state_flags_locked(fnic, 2080 FNIC_FLAGS_IO_BLOCKED))) { 2081 spin_unlock_irqrestore(host->host_lock, intr_flags); 2082 return FAILED; 2083 } else 2084 atomic_inc(&fnic->in_flight); 2085 spin_unlock_irqrestore(host->host_lock, intr_flags); 2086 2087 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags); 2088 2089 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0]) 2090 free_wq_copy_descs(fnic, wq); 2091 2092 if (!vnic_wq_copy_desc_avail(wq)) { 2093 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2094 "queue_dr_io_req failure - no descriptors\n"); 2095 atomic64_inc(&misc_stats->devrst_cpwq_alloc_failures); 2096 ret = -EAGAIN; 2097 goto lr_io_req_end; 2098 } 2099 2100 /* fill in the lun info */ 2101 int_to_scsilun(sc->device->lun, &fc_lun); 2102 2103 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST, 2104 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG, 2105 fc_lun.scsi_lun, io_req->port_id, 2106 fnic->config.ra_tov, fnic->config.ed_tov); 2107 2108 atomic64_inc(&fnic->fnic_stats.fw_stats.active_fw_reqs); 2109 if (atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs) > 2110 atomic64_read(&fnic->fnic_stats.fw_stats.max_fw_reqs)) 2111 atomic64_set(&fnic->fnic_stats.fw_stats.max_fw_reqs, 2112 atomic64_read(&fnic->fnic_stats.fw_stats.active_fw_reqs)); 2113 2114lr_io_req_end: 2115 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags); 2116 atomic_dec(&fnic->in_flight); 2117 2118 return ret; 2119} 2120 2121/* 2122 * Clean up any pending aborts on the lun 2123 * For each outstanding IO on this lun, whose abort is not completed by fw, 2124 * issue a local abort. Wait for abort to complete. Return 0 if all commands 2125 * successfully aborted, 1 otherwise 2126 */ 2127static int fnic_clean_pending_aborts(struct fnic *fnic, 2128 struct scsi_cmnd *lr_sc, 2129 bool new_sc) 2130 2131{ 2132 int tag, abt_tag; 2133 struct fnic_io_req *io_req; 2134 spinlock_t *io_lock; 2135 unsigned long flags; 2136 int ret = 0; 2137 struct scsi_cmnd *sc; 2138 struct scsi_lun fc_lun; 2139 struct scsi_device *lun_dev = lr_sc->device; 2140 DECLARE_COMPLETION_ONSTACK(tm_done); 2141 enum fnic_ioreq_state old_ioreq_state; 2142 2143 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2144 io_lock = fnic_io_lock_tag(fnic, tag); 2145 spin_lock_irqsave(io_lock, flags); 2146 sc = scsi_host_find_tag(fnic->lport->host, tag); 2147 /* 2148 * ignore this lun reset cmd if issued using new SC 2149 * or cmds that do not belong to this lun 2150 */ 2151 if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) { 2152 spin_unlock_irqrestore(io_lock, flags); 2153 continue; 2154 } 2155 2156 io_req = (struct fnic_io_req *)CMD_SP(sc); 2157 2158 if (!io_req || sc->device != lun_dev) { 2159 spin_unlock_irqrestore(io_lock, flags); 2160 continue; 2161 } 2162 2163 /* 2164 * Found IO that is still pending with firmware and 2165 * belongs to the LUN that we are resetting 2166 */ 2167 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2168 "Found IO in %s on lun\n", 2169 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2170 2171 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) { 2172 spin_unlock_irqrestore(io_lock, flags); 2173 continue; 2174 } 2175 if ((CMD_FLAGS(sc) & FNIC_DEVICE_RESET) && 2176 (!(CMD_FLAGS(sc) & FNIC_DEV_RST_ISSUED))) { 2177 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2178 "%s dev rst not pending sc 0x%p\n", __func__, 2179 sc); 2180 spin_unlock_irqrestore(io_lock, flags); 2181 continue; 2182 } 2183 2184 if (io_req->abts_done) 2185 shost_printk(KERN_ERR, fnic->lport->host, 2186 "%s: io_req->abts_done is set state is %s\n", 2187 __func__, fnic_ioreq_state_to_str(CMD_STATE(sc))); 2188 old_ioreq_state = CMD_STATE(sc); 2189 /* 2190 * Any pending IO issued prior to reset is expected to be 2191 * in abts pending state, if not we need to set 2192 * FNIC_IOREQ_ABTS_PENDING to indicate the IO is abort pending. 2193 * When IO is completed, the IO will be handed over and 2194 * handled in this function. 2195 */ 2196 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2197 2198 BUG_ON(io_req->abts_done); 2199 2200 abt_tag = tag; 2201 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) { 2202 abt_tag |= FNIC_TAG_DEV_RST; 2203 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2204 "%s: dev rst sc 0x%p\n", __func__, sc); 2205 } 2206 2207 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE; 2208 io_req->abts_done = &tm_done; 2209 spin_unlock_irqrestore(io_lock, flags); 2210 2211 /* Now queue the abort command to firmware */ 2212 int_to_scsilun(sc->device->lun, &fc_lun); 2213 2214 if (fnic_queue_abort_io_req(fnic, abt_tag, 2215 FCPIO_ITMF_ABT_TASK_TERM, 2216 fc_lun.scsi_lun, io_req)) { 2217 spin_lock_irqsave(io_lock, flags); 2218 io_req = (struct fnic_io_req *)CMD_SP(sc); 2219 if (io_req) 2220 io_req->abts_done = NULL; 2221 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2222 CMD_STATE(sc) = old_ioreq_state; 2223 spin_unlock_irqrestore(io_lock, flags); 2224 ret = 1; 2225 goto clean_pending_aborts_end; 2226 } else { 2227 spin_lock_irqsave(io_lock, flags); 2228 if (CMD_FLAGS(sc) & FNIC_DEVICE_RESET) 2229 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2230 spin_unlock_irqrestore(io_lock, flags); 2231 } 2232 CMD_FLAGS(sc) |= FNIC_IO_INTERNAL_TERM_ISSUED; 2233 2234 wait_for_completion_timeout(&tm_done, 2235 msecs_to_jiffies 2236 (fnic->config.ed_tov)); 2237 2238 /* Recheck cmd state to check if it is now aborted */ 2239 spin_lock_irqsave(io_lock, flags); 2240 io_req = (struct fnic_io_req *)CMD_SP(sc); 2241 if (!io_req) { 2242 spin_unlock_irqrestore(io_lock, flags); 2243 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_REQ_NULL; 2244 continue; 2245 } 2246 2247 io_req->abts_done = NULL; 2248 2249 /* if abort is still pending with fw, fail */ 2250 if (CMD_ABTS_STATUS(sc) == FCPIO_INVALID_CODE) { 2251 spin_unlock_irqrestore(io_lock, flags); 2252 CMD_FLAGS(sc) |= FNIC_IO_ABT_TERM_DONE; 2253 ret = 1; 2254 goto clean_pending_aborts_end; 2255 } 2256 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE; 2257 2258 /* original sc used for lr is handled by dev reset code */ 2259 if (sc != lr_sc) 2260 CMD_SP(sc) = NULL; 2261 spin_unlock_irqrestore(io_lock, flags); 2262 2263 /* original sc used for lr is handled by dev reset code */ 2264 if (sc != lr_sc) { 2265 fnic_release_ioreq_buf(fnic, io_req, sc); 2266 mempool_free(io_req, fnic->io_req_pool); 2267 } 2268 2269 /* 2270 * Any IO is returned during reset, it needs to call scsi_done 2271 * to return the scsi_cmnd to upper layer. 2272 */ 2273 if (sc->scsi_done) { 2274 /* Set result to let upper SCSI layer retry */ 2275 sc->result = DID_RESET << 16; 2276 sc->scsi_done(sc); 2277 } 2278 } 2279 2280 schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov)); 2281 2282 /* walk again to check, if IOs are still pending in fw */ 2283 if (fnic_is_abts_pending(fnic, lr_sc)) 2284 ret = FAILED; 2285 2286clean_pending_aborts_end: 2287 return ret; 2288} 2289 2290/** 2291 * fnic_scsi_host_start_tag 2292 * Allocates tagid from host's tag list 2293 **/ 2294static inline int 2295fnic_scsi_host_start_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2296{ 2297 struct request_queue *q = sc->request->q; 2298 struct request *dummy; 2299 2300 dummy = blk_mq_alloc_request(q, REQ_OP_WRITE, BLK_MQ_REQ_NOWAIT); 2301 if (IS_ERR(dummy)) 2302 return SCSI_NO_TAG; 2303 2304 sc->tag = sc->request->tag = dummy->tag; 2305 sc->host_scribble = (unsigned char *)dummy; 2306 2307 return dummy->tag; 2308} 2309 2310/** 2311 * fnic_scsi_host_end_tag 2312 * frees tag allocated by fnic_scsi_host_start_tag. 2313 **/ 2314static inline void 2315fnic_scsi_host_end_tag(struct fnic *fnic, struct scsi_cmnd *sc) 2316{ 2317 struct request *dummy = (struct request *)sc->host_scribble; 2318 2319 blk_mq_free_request(dummy); 2320} 2321 2322/* 2323 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN 2324 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command 2325 * on the LUN. 2326 */ 2327int fnic_device_reset(struct scsi_cmnd *sc) 2328{ 2329 struct fc_lport *lp; 2330 struct fnic *fnic; 2331 struct fnic_io_req *io_req = NULL; 2332 struct fc_rport *rport; 2333 int status; 2334 int ret = FAILED; 2335 spinlock_t *io_lock; 2336 unsigned long flags; 2337 unsigned long start_time = 0; 2338 struct scsi_lun fc_lun; 2339 struct fnic_stats *fnic_stats; 2340 struct reset_stats *reset_stats; 2341 int tag = 0; 2342 DECLARE_COMPLETION_ONSTACK(tm_done); 2343 int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/ 2344 bool new_sc = 0; 2345 2346 /* Wait for rport to unblock */ 2347 fc_block_scsi_eh(sc); 2348 2349 /* Get local-port, check ready and link up */ 2350 lp = shost_priv(sc->device->host); 2351 2352 fnic = lport_priv(lp); 2353 fnic_stats = &fnic->fnic_stats; 2354 reset_stats = &fnic->fnic_stats.reset_stats; 2355 2356 atomic64_inc(&reset_stats->device_resets); 2357 2358 rport = starget_to_rport(scsi_target(sc->device)); 2359 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2360 "Device reset called FCID 0x%x, LUN 0x%llx sc 0x%p\n", 2361 rport->port_id, sc->device->lun, sc); 2362 2363 if (lp->state != LPORT_ST_READY || !(lp->link_up)) 2364 goto fnic_device_reset_end; 2365 2366 /* Check if remote port up */ 2367 if (fc_remote_port_chkready(rport)) { 2368 atomic64_inc(&fnic_stats->misc_stats.rport_not_ready); 2369 goto fnic_device_reset_end; 2370 } 2371 2372 CMD_FLAGS(sc) = FNIC_DEVICE_RESET; 2373 /* Allocate tag if not present */ 2374 2375 tag = sc->request->tag; 2376 if (unlikely(tag < 0)) { 2377 /* 2378 * Really should fix the midlayer to pass in a proper 2379 * request for ioctls... 2380 */ 2381 tag = fnic_scsi_host_start_tag(fnic, sc); 2382 if (unlikely(tag == SCSI_NO_TAG)) 2383 goto fnic_device_reset_end; 2384 tag_gen_flag = 1; 2385 new_sc = 1; 2386 } 2387 io_lock = fnic_io_lock_hash(fnic, sc); 2388 spin_lock_irqsave(io_lock, flags); 2389 io_req = (struct fnic_io_req *)CMD_SP(sc); 2390 2391 /* 2392 * If there is a io_req attached to this command, then use it, 2393 * else allocate a new one. 2394 */ 2395 if (!io_req) { 2396 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC); 2397 if (!io_req) { 2398 spin_unlock_irqrestore(io_lock, flags); 2399 goto fnic_device_reset_end; 2400 } 2401 memset(io_req, 0, sizeof(*io_req)); 2402 io_req->port_id = rport->port_id; 2403 CMD_SP(sc) = (char *)io_req; 2404 } 2405 io_req->dr_done = &tm_done; 2406 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING; 2407 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE; 2408 spin_unlock_irqrestore(io_lock, flags); 2409 2410 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %x\n", tag); 2411 2412 /* 2413 * issue the device reset, if enqueue failed, clean up the ioreq 2414 * and break assoc with scsi cmd 2415 */ 2416 if (fnic_queue_dr_io_req(fnic, sc, io_req)) { 2417 spin_lock_irqsave(io_lock, flags); 2418 io_req = (struct fnic_io_req *)CMD_SP(sc); 2419 if (io_req) 2420 io_req->dr_done = NULL; 2421 goto fnic_device_reset_clean; 2422 } 2423 spin_lock_irqsave(io_lock, flags); 2424 CMD_FLAGS(sc) |= FNIC_DEV_RST_ISSUED; 2425 spin_unlock_irqrestore(io_lock, flags); 2426 2427 /* 2428 * Wait on the local completion for LUN reset. The io_req may be 2429 * freed while we wait since we hold no lock. 2430 */ 2431 wait_for_completion_timeout(&tm_done, 2432 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2433 2434 spin_lock_irqsave(io_lock, flags); 2435 io_req = (struct fnic_io_req *)CMD_SP(sc); 2436 if (!io_req) { 2437 spin_unlock_irqrestore(io_lock, flags); 2438 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2439 "io_req is null tag 0x%x sc 0x%p\n", tag, sc); 2440 goto fnic_device_reset_end; 2441 } 2442 io_req->dr_done = NULL; 2443 2444 status = CMD_LR_STATUS(sc); 2445 2446 /* 2447 * If lun reset not completed, bail out with failed. io_req 2448 * gets cleaned up during higher levels of EH 2449 */ 2450 if (status == FCPIO_INVALID_CODE) { 2451 atomic64_inc(&reset_stats->device_reset_timeouts); 2452 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2453 "Device reset timed out\n"); 2454 CMD_FLAGS(sc) |= FNIC_DEV_RST_TIMED_OUT; 2455 spin_unlock_irqrestore(io_lock, flags); 2456 int_to_scsilun(sc->device->lun, &fc_lun); 2457 /* 2458 * Issue abort and terminate on device reset request. 2459 * If q'ing of terminate fails, retry it after a delay. 2460 */ 2461 while (1) { 2462 spin_lock_irqsave(io_lock, flags); 2463 if (CMD_FLAGS(sc) & FNIC_DEV_RST_TERM_ISSUED) { 2464 spin_unlock_irqrestore(io_lock, flags); 2465 break; 2466 } 2467 spin_unlock_irqrestore(io_lock, flags); 2468 if (fnic_queue_abort_io_req(fnic, 2469 tag | FNIC_TAG_DEV_RST, 2470 FCPIO_ITMF_ABT_TASK_TERM, 2471 fc_lun.scsi_lun, io_req)) { 2472 wait_for_completion_timeout(&tm_done, 2473 msecs_to_jiffies(FNIC_ABT_TERM_DELAY_TIMEOUT)); 2474 } else { 2475 spin_lock_irqsave(io_lock, flags); 2476 CMD_FLAGS(sc) |= FNIC_DEV_RST_TERM_ISSUED; 2477 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING; 2478 io_req->abts_done = &tm_done; 2479 spin_unlock_irqrestore(io_lock, flags); 2480 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2481 "Abort and terminate issued on Device reset " 2482 "tag 0x%x sc 0x%p\n", tag, sc); 2483 break; 2484 } 2485 } 2486 while (1) { 2487 spin_lock_irqsave(io_lock, flags); 2488 if (!(CMD_FLAGS(sc) & FNIC_DEV_RST_DONE)) { 2489 spin_unlock_irqrestore(io_lock, flags); 2490 wait_for_completion_timeout(&tm_done, 2491 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT)); 2492 break; 2493 } else { 2494 io_req = (struct fnic_io_req *)CMD_SP(sc); 2495 io_req->abts_done = NULL; 2496 goto fnic_device_reset_clean; 2497 } 2498 } 2499 } else { 2500 spin_unlock_irqrestore(io_lock, flags); 2501 } 2502 2503 /* Completed, but not successful, clean up the io_req, return fail */ 2504 if (status != FCPIO_SUCCESS) { 2505 spin_lock_irqsave(io_lock, flags); 2506 FNIC_SCSI_DBG(KERN_DEBUG, 2507 fnic->lport->host, 2508 "Device reset completed - failed\n"); 2509 io_req = (struct fnic_io_req *)CMD_SP(sc); 2510 goto fnic_device_reset_clean; 2511 } 2512 2513 /* 2514 * Clean up any aborts on this lun that have still not 2515 * completed. If any of these fail, then LUN reset fails. 2516 * clean_pending_aborts cleans all cmds on this lun except 2517 * the lun reset cmd. If all cmds get cleaned, the lun reset 2518 * succeeds 2519 */ 2520 if (fnic_clean_pending_aborts(fnic, sc, new_sc)) { 2521 spin_lock_irqsave(io_lock, flags); 2522 io_req = (struct fnic_io_req *)CMD_SP(sc); 2523 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2524 "Device reset failed" 2525 " since could not abort all IOs\n"); 2526 goto fnic_device_reset_clean; 2527 } 2528 2529 /* Clean lun reset command */ 2530 spin_lock_irqsave(io_lock, flags); 2531 io_req = (struct fnic_io_req *)CMD_SP(sc); 2532 if (io_req) 2533 /* Completed, and successful */ 2534 ret = SUCCESS; 2535 2536fnic_device_reset_clean: 2537 if (io_req) 2538 CMD_SP(sc) = NULL; 2539 2540 spin_unlock_irqrestore(io_lock, flags); 2541 2542 if (io_req) { 2543 start_time = io_req->start_time; 2544 fnic_release_ioreq_buf(fnic, io_req, sc); 2545 mempool_free(io_req, fnic->io_req_pool); 2546 } 2547 2548fnic_device_reset_end: 2549 FNIC_TRACE(fnic_device_reset, sc->device->host->host_no, 2550 sc->request->tag, sc, 2551 jiffies_to_msecs(jiffies - start_time), 2552 0, ((u64)sc->cmnd[0] << 32 | 2553 (u64)sc->cmnd[2] << 24 | (u64)sc->cmnd[3] << 16 | 2554 (u64)sc->cmnd[4] << 8 | sc->cmnd[5]), 2555 (((u64)CMD_FLAGS(sc) << 32) | CMD_STATE(sc))); 2556 2557 /* free tag if it is allocated */ 2558 if (unlikely(tag_gen_flag)) 2559 fnic_scsi_host_end_tag(fnic, sc); 2560 2561 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2562 "Returning from device reset %s\n", 2563 (ret == SUCCESS) ? 2564 "SUCCESS" : "FAILED"); 2565 2566 if (ret == FAILED) 2567 atomic64_inc(&reset_stats->device_reset_failures); 2568 2569 return ret; 2570} 2571 2572/* Clean up all IOs, clean up libFC local port */ 2573int fnic_reset(struct Scsi_Host *shost) 2574{ 2575 struct fc_lport *lp; 2576 struct fnic *fnic; 2577 int ret = 0; 2578 struct reset_stats *reset_stats; 2579 2580 lp = shost_priv(shost); 2581 fnic = lport_priv(lp); 2582 reset_stats = &fnic->fnic_stats.reset_stats; 2583 2584 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2585 "fnic_reset called\n"); 2586 2587 atomic64_inc(&reset_stats->fnic_resets); 2588 2589 /* 2590 * Reset local port, this will clean up libFC exchanges, 2591 * reset remote port sessions, and if link is up, begin flogi 2592 */ 2593 ret = fc_lport_reset(lp); 2594 2595 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2596 "Returning from fnic reset %s\n", 2597 (ret == 0) ? 2598 "SUCCESS" : "FAILED"); 2599 2600 if (ret == 0) 2601 atomic64_inc(&reset_stats->fnic_reset_completions); 2602 else 2603 atomic64_inc(&reset_stats->fnic_reset_failures); 2604 2605 return ret; 2606} 2607 2608/* 2609 * SCSI Error handling calls driver's eh_host_reset if all prior 2610 * error handling levels return FAILED. If host reset completes 2611 * successfully, and if link is up, then Fabric login begins. 2612 * 2613 * Host Reset is the highest level of error recovery. If this fails, then 2614 * host is offlined by SCSI. 2615 * 2616 */ 2617int fnic_host_reset(struct scsi_cmnd *sc) 2618{ 2619 int ret; 2620 unsigned long wait_host_tmo; 2621 struct Scsi_Host *shost = sc->device->host; 2622 struct fc_lport *lp = shost_priv(shost); 2623 struct fnic *fnic = lport_priv(lp); 2624 unsigned long flags; 2625 2626 spin_lock_irqsave(&fnic->fnic_lock, flags); 2627 if (!fnic->internal_reset_inprogress) { 2628 fnic->internal_reset_inprogress = true; 2629 } else { 2630 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2631 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2632 "host reset in progress skipping another host reset\n"); 2633 return SUCCESS; 2634 } 2635 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2636 2637 /* 2638 * If fnic_reset is successful, wait for fabric login to complete 2639 * scsi-ml tries to send a TUR to every device if host reset is 2640 * successful, so before returning to scsi, fabric should be up 2641 */ 2642 ret = (fnic_reset(shost) == 0) ? SUCCESS : FAILED; 2643 if (ret == SUCCESS) { 2644 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ; 2645 ret = FAILED; 2646 while (time_before(jiffies, wait_host_tmo)) { 2647 if ((lp->state == LPORT_ST_READY) && 2648 (lp->link_up)) { 2649 ret = SUCCESS; 2650 break; 2651 } 2652 ssleep(1); 2653 } 2654 } 2655 2656 spin_lock_irqsave(&fnic->fnic_lock, flags); 2657 fnic->internal_reset_inprogress = false; 2658 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2659 return ret; 2660} 2661 2662/* 2663 * This fxn is called from libFC when host is removed 2664 */ 2665void fnic_scsi_abort_io(struct fc_lport *lp) 2666{ 2667 int err = 0; 2668 unsigned long flags; 2669 enum fnic_state old_state; 2670 struct fnic *fnic = lport_priv(lp); 2671 DECLARE_COMPLETION_ONSTACK(remove_wait); 2672 2673 /* Issue firmware reset for fnic, wait for reset to complete */ 2674retry_fw_reset: 2675 spin_lock_irqsave(&fnic->fnic_lock, flags); 2676 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2677 /* fw reset is in progress, poll for its completion */ 2678 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2679 schedule_timeout(msecs_to_jiffies(100)); 2680 goto retry_fw_reset; 2681 } 2682 2683 fnic->remove_wait = &remove_wait; 2684 old_state = fnic->state; 2685 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2686 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2687 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2688 2689 err = fnic_fw_reset_handler(fnic); 2690 if (err) { 2691 spin_lock_irqsave(&fnic->fnic_lock, flags); 2692 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2693 fnic->state = old_state; 2694 fnic->remove_wait = NULL; 2695 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2696 return; 2697 } 2698 2699 /* Wait for firmware reset to complete */ 2700 wait_for_completion_timeout(&remove_wait, 2701 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT)); 2702 2703 spin_lock_irqsave(&fnic->fnic_lock, flags); 2704 fnic->remove_wait = NULL; 2705 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, 2706 "fnic_scsi_abort_io %s\n", 2707 (fnic->state == FNIC_IN_ETH_MODE) ? 2708 "SUCCESS" : "FAILED"); 2709 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2710 2711} 2712 2713/* 2714 * This fxn called from libFC to clean up driver IO state on link down 2715 */ 2716void fnic_scsi_cleanup(struct fc_lport *lp) 2717{ 2718 unsigned long flags; 2719 enum fnic_state old_state; 2720 struct fnic *fnic = lport_priv(lp); 2721 2722 /* issue fw reset */ 2723retry_fw_reset: 2724 spin_lock_irqsave(&fnic->fnic_lock, flags); 2725 if (unlikely(fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)) { 2726 /* fw reset is in progress, poll for its completion */ 2727 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2728 schedule_timeout(msecs_to_jiffies(100)); 2729 goto retry_fw_reset; 2730 } 2731 old_state = fnic->state; 2732 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 2733 fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr); 2734 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2735 2736 if (fnic_fw_reset_handler(fnic)) { 2737 spin_lock_irqsave(&fnic->fnic_lock, flags); 2738 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) 2739 fnic->state = old_state; 2740 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 2741 } 2742 2743} 2744 2745void fnic_empty_scsi_cleanup(struct fc_lport *lp) 2746{ 2747} 2748 2749void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did) 2750{ 2751 struct fnic *fnic = lport_priv(lp); 2752 2753 /* Non-zero sid, nothing to do */ 2754 if (sid) 2755 goto call_fc_exch_mgr_reset; 2756 2757 if (did) { 2758 fnic_rport_exch_reset(fnic, did); 2759 goto call_fc_exch_mgr_reset; 2760 } 2761 2762 /* 2763 * sid = 0, did = 0 2764 * link down or device being removed 2765 */ 2766 if (!fnic->in_remove) 2767 fnic_scsi_cleanup(lp); 2768 else 2769 fnic_scsi_abort_io(lp); 2770 2771 /* call libFC exch mgr reset to reset its exchanges */ 2772call_fc_exch_mgr_reset: 2773 fc_exch_mgr_reset(lp, sid, did); 2774 2775} 2776 2777/* 2778 * fnic_is_abts_pending() is a helper function that 2779 * walks through tag map to check if there is any IOs pending,if there is one, 2780 * then it returns 1 (true), otherwise 0 (false) 2781 * if @lr_sc is non NULL, then it checks IOs specific to particular LUN, 2782 * otherwise, it checks for all IOs. 2783 */ 2784int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc) 2785{ 2786 int tag; 2787 struct fnic_io_req *io_req; 2788 spinlock_t *io_lock; 2789 unsigned long flags; 2790 int ret = 0; 2791 struct scsi_cmnd *sc; 2792 struct scsi_device *lun_dev = NULL; 2793 2794 if (lr_sc) 2795 lun_dev = lr_sc->device; 2796 2797 /* walk again to check, if IOs are still pending in fw */ 2798 for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) { 2799 sc = scsi_host_find_tag(fnic->lport->host, tag); 2800 /* 2801 * ignore this lun reset cmd or cmds that do not belong to 2802 * this lun 2803 */ 2804 if (!sc || (lr_sc && (sc->device != lun_dev || sc == lr_sc))) 2805 continue; 2806 2807 io_lock = fnic_io_lock_hash(fnic, sc); 2808 spin_lock_irqsave(io_lock, flags); 2809 2810 io_req = (struct fnic_io_req *)CMD_SP(sc); 2811 2812 if (!io_req || sc->device != lun_dev) { 2813 spin_unlock_irqrestore(io_lock, flags); 2814 continue; 2815 } 2816 2817 /* 2818 * Found IO that is still pending with firmware and 2819 * belongs to the LUN that we are resetting 2820 */ 2821 FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host, 2822 "Found IO in %s on lun\n", 2823 fnic_ioreq_state_to_str(CMD_STATE(sc))); 2824 2825 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) 2826 ret = 1; 2827 spin_unlock_irqrestore(io_lock, flags); 2828 } 2829 2830 return ret; 2831} 2832