drivers/scsi/fnic/fnic_scsi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   4  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   5  */
   6 #include <linux/mempool.h>
   7 #include <linux/errno.h>
   8 #include <linux/init.h>
   9 #include <linux/workqueue.h>
  10 #include <linux/pci.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/skbuff.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/etherdevice.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/if_vlan.h>
  17 #include <linux/delay.h>
  18 #include <linux/gfp.h>
  19 #include <scsi/scsi.h>
  20 #include <scsi/scsi_host.h>
  21 #include <scsi/scsi_device.h>
  22 #include <scsi/scsi_cmnd.h>
  23 #include <scsi/scsi_tcq.h>
  24 #include <scsi/fc/fc_els.h>
  25 #include <scsi/fc/fc_fcoe.h>
  26 #include <scsi/libfc.h>
  27 #include <scsi/fc_frame.h>
  28 #include "fnic_io.h"
  29 #include "fnic.h"
  30
  31 const char *fnic_state_str[] = {
  32         [FNIC_IN_FC_MODE] =           "FNIC_IN_FC_MODE",
  33         [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
  34         [FNIC_IN_ETH_MODE] =          "FNIC_IN_ETH_MODE",
  35         [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
  36 };
  37
  38 static const char *fnic_ioreq_state_str[] = {
  39         [FNIC_IOREQ_NOT_INITED] = "FNIC_IOREQ_NOT_INITED",
  40         [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
  41         [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
  42         [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
  43         [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
  44 };
  45
  46 static const char *fcpio_status_str[] =  {
  47         [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
  48         [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
  49         [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
  50         [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
  51         [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
  52         [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
  53         [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
  54         [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
  55         [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
  56         [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
  57         [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
  58         [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
  59         [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
  60         [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
  61         [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
  62         [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
  63         [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
  64         [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
  65         [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
  66 };
  67
  68 const char *fnic_state_to_str(unsigned int state)
  69 {
  70         if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
  71                 return "unknown";
  72
  73         return fnic_state_str[state];
  74 }
  75
  76 static const char *fnic_ioreq_state_to_str(unsigned int state)
  77 {
  78         if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
  79             !fnic_ioreq_state_str[state])
  80                 return "unknown";
  81
  82         return fnic_ioreq_state_str[state];
  83 }
  84
  85 static const char *fnic_fcpio_status_to_str(unsigned int status)
  86 {
  87         if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
  88                 return "unknown";
  89
  90         return fcpio_status_str[status];
  91 }
  92
  93 static void fnic_cleanup_io(struct fnic *fnic);
  94
  95 static 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
 103 static 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  */
 113 static 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 */
 132 static 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  **/
 168 void
 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  */
 194 int 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  */
 247 int 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
 296 flogi_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  */
 305 static 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  */
 411 static 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         }
 586 out:
 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
 606 DEF_SCSI_QCMD(fnic_queuecommand)
 607
 608 /*
 609  * fnic_fcpio_fw_reset_cmpl_handler
 610  * Routine to handle fw reset completion
 611  */
 612 static 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  */
 696 static 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
 746 reg_cmpl_handler_end:
 747         return ret;
 748 }
 749
 750 static 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  */
 775 static 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  */
 806 static 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  */
1045 static 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  */
1268 static 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  */
1322 int 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
1357 static 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
1405 cleanup_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
1436 static void fnic_cleanup_io(struct fnic *fnic)
1437 {
1438         scsi_host_busy_iter(fnic->lport->host,
1439                             fnic_cleanup_io_iter, fnic);
1440 }
1441
1442 void 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
1485 wq_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
1501 static 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
1548 struct fnic_rport_abort_io_iter_data {
1549         struct fnic *fnic;
1550         u32 port_id;
1551         int term_cnt;
1552 };
1553
1554 static 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
1653 static 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
1677 void 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  */
1717 int 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
1932 fnic_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
1947 static 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
1999 lr_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
2006 struct 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
2013 static 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  */
2158 static 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
2184 clean_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  */
2195 int 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
2411 fnic_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
2423 fnic_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 */
2448 int 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  */
2492 int 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  */
2540 void 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 */
2549 retry_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  */
2592 void 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 */
2599 retry_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
2621 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
2622 {
2623 }
2624
2625 void 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 */
2648 call_fc_exch_mgr_reset:
2649         fc_exch_mgr_reset(lp, sid, did);
2650
2651 }
2652
2653 static 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  */
2702 int 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 }