drivers/scsi/fnic/fnic_scsi.c

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