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