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 <scsi/scsi.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_cmnd.h>
  33 #include <scsi/scsi_tcq.h>
  34 #include <scsi/fc/fc_els.h>
  35 #include <scsi/fc/fc_fcoe.h>
  36 #include <scsi/libfc.h>
  37 #include <scsi/fc_frame.h>
  38 #include "fnic_io.h"
  39 #include "fnic.h"
  40
  41 const char *fnic_state_str[] = {
  42         [FNIC_IN_FC_MODE] =           "FNIC_IN_FC_MODE",
  43         [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
  44         [FNIC_IN_ETH_MODE] =          "FNIC_IN_ETH_MODE",
  45         [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
  46 };
  47
  48 static const char *fnic_ioreq_state_str[] = {
  49         [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
  50         [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
  51         [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
  52         [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
  53 };
  54
  55 static const char *fcpio_status_str[] =  {
  56         [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
  57         [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
  58         [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
  59         [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
  60         [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
  61         [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
  62         [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
  63         [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
  64         [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
  65         [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
  66         [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
  67         [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
  68         [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
  69         [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
  70         [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
  71         [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
  72         [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
  73         [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
  74         [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
  75 };
  76
  77 const char *fnic_state_to_str(unsigned int state)
  78 {
  79         if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
  80                 return "unknown";
  81
  82         return fnic_state_str[state];
  83 }
  84
  85 static const char *fnic_ioreq_state_to_str(unsigned int state)
  86 {
  87         if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
  88             !fnic_ioreq_state_str[state])
  89                 return "unknown";
  90
  91         return fnic_ioreq_state_str[state];
  92 }
  93
  94 static const char *fnic_fcpio_status_to_str(unsigned int status)
  95 {
  96         if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
  97                 return "unknown";
  98
  99         return fcpio_status_str[status];
 100 }
 101
 102 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
 103
 104 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
 105                                             struct scsi_cmnd *sc)
 106 {
 107         u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
 108
 109         return &fnic->io_req_lock[hash];
 110 }
 111
 112 /*
 113  * Unmap the data buffer and sense buffer for an io_req,
 114  * also unmap and free the device-private scatter/gather list.
 115  */
 116 static void fnic_release_ioreq_buf(struct fnic *fnic,
 117                                    struct fnic_io_req *io_req,
 118                                    struct scsi_cmnd *sc)
 119 {
 120         if (io_req->sgl_list_pa)
 121                 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
 122                                  sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
 123                                  PCI_DMA_TODEVICE);
 124         scsi_dma_unmap(sc);
 125
 126         if (io_req->sgl_cnt)
 127                 mempool_free(io_req->sgl_list_alloc,
 128                              fnic->io_sgl_pool[io_req->sgl_type]);
 129         if (io_req->sense_buf_pa)
 130                 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
 131                                  SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
 132 }
 133
 134 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
 135 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
 136 {
 137         /* if no Ack received from firmware, then nothing to clean */
 138         if (!fnic->fw_ack_recd[0])
 139                 return 1;
 140
 141         /*
 142          * Update desc_available count based on number of freed descriptors
 143          * Account for wraparound
 144          */
 145         if (wq->to_clean_index <= fnic->fw_ack_index[0])
 146                 wq->ring.desc_avail += (fnic->fw_ack_index[0]
 147                                         - wq->to_clean_index + 1);
 148         else
 149                 wq->ring.desc_avail += (wq->ring.desc_count
 150                                         - wq->to_clean_index
 151                                         + fnic->fw_ack_index[0] + 1);
 152
 153         /*
 154          * just bump clean index to ack_index+1 accounting for wraparound
 155          * this will essentially free up all descriptors between
 156          * to_clean_index and fw_ack_index, both inclusive
 157          */
 158         wq->to_clean_index =
 159                 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
 160
 161         /* we have processed the acks received so far */
 162         fnic->fw_ack_recd[0] = 0;
 163         return 0;
 164 }
 165
 166
 167 /*
 168  * fnic_fw_reset_handler
 169  * Routine to send reset msg to fw
 170  */
 171 int fnic_fw_reset_handler(struct fnic *fnic)
 172 {
 173         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
 174         int ret = 0;
 175         unsigned long flags;
 176
 177         skb_queue_purge(&fnic->frame_queue);
 178         skb_queue_purge(&fnic->tx_queue);
 179
 180         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 181
 182         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 183                 free_wq_copy_descs(fnic, wq);
 184
 185         if (!vnic_wq_copy_desc_avail(wq))
 186                 ret = -EAGAIN;
 187         else
 188                 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
 189
 190         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 191
 192         if (!ret)
 193                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 194                               "Issued fw reset\n");
 195         else
 196                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 197                               "Failed to issue fw reset\n");
 198         return ret;
 199 }
 200
 201
 202 /*
 203  * fnic_flogi_reg_handler
 204  * Routine to send flogi register msg to fw
 205  */
 206 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
 207 {
 208         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
 209         enum fcpio_flogi_reg_format_type format;
 210         struct fc_lport *lp = fnic->lport;
 211         u8 gw_mac[ETH_ALEN];
 212         int ret = 0;
 213         unsigned long flags;
 214
 215         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 216
 217         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 218                 free_wq_copy_descs(fnic, wq);
 219
 220         if (!vnic_wq_copy_desc_avail(wq)) {
 221                 ret = -EAGAIN;
 222                 goto flogi_reg_ioreq_end;
 223         }
 224
 225         if (fnic->ctlr.map_dest) {
 226                 memset(gw_mac, 0xff, ETH_ALEN);
 227                 format = FCPIO_FLOGI_REG_DEF_DEST;
 228         } else {
 229                 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
 230                 format = FCPIO_FLOGI_REG_GW_DEST;
 231         }
 232
 233         if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
 234                 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
 235                                                 fc_id, gw_mac,
 236                                                 fnic->data_src_addr,
 237                                                 lp->r_a_tov, lp->e_d_tov);
 238                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 239                               "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
 240                               fc_id, fnic->data_src_addr, gw_mac);
 241         } else {
 242                 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
 243                                                   format, fc_id, gw_mac);
 244                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 245                               "FLOGI reg issued fcid %x map %d dest %pM\n",
 246                               fc_id, fnic->ctlr.map_dest, gw_mac);
 247         }
 248
 249 flogi_reg_ioreq_end:
 250         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 251         return ret;
 252 }
 253
 254 /*
 255  * fnic_queue_wq_copy_desc
 256  * Routine to enqueue a wq copy desc
 257  */
 258 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
 259                                           struct vnic_wq_copy *wq,
 260                                           struct fnic_io_req *io_req,
 261                                           struct scsi_cmnd *sc,
 262                                           int sg_count)
 263 {
 264         struct scatterlist *sg;
 265         struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
 266         struct fc_rport_libfc_priv *rp = rport->dd_data;
 267         struct host_sg_desc *desc;
 268         u8 pri_tag = 0;
 269         unsigned int i;
 270         unsigned long intr_flags;
 271         int flags;
 272         u8 exch_flags;
 273         struct scsi_lun fc_lun;
 274         char msg[2];
 275
 276         if (sg_count) {
 277                 /* For each SGE, create a device desc entry */
 278                 desc = io_req->sgl_list;
 279                 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
 280                         desc->addr = cpu_to_le64(sg_dma_address(sg));
 281                         desc->len = cpu_to_le32(sg_dma_len(sg));
 282                         desc->_resvd = 0;
 283                         desc++;
 284                 }
 285
 286                 io_req->sgl_list_pa = pci_map_single
 287                         (fnic->pdev,
 288                          io_req->sgl_list,
 289                          sizeof(io_req->sgl_list[0]) * sg_count,
 290                          PCI_DMA_TODEVICE);
 291         }
 292
 293         io_req->sense_buf_pa = pci_map_single(fnic->pdev,
 294                                               sc->sense_buffer,
 295                                               SCSI_SENSE_BUFFERSIZE,
 296                                               PCI_DMA_FROMDEVICE);
 297
 298         int_to_scsilun(sc->device->lun, &fc_lun);
 299
 300         pri_tag = FCPIO_ICMND_PTA_SIMPLE;
 301         msg[0] = MSG_SIMPLE_TAG;
 302         scsi_populate_tag_msg(sc, msg);
 303         if (msg[0] == MSG_ORDERED_TAG)
 304                 pri_tag = FCPIO_ICMND_PTA_ORDERED;
 305
 306         /* Enqueue the descriptor in the Copy WQ */
 307         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
 308
 309         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 310                 free_wq_copy_descs(fnic, wq);
 311
 312         if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
 313                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 314                 return SCSI_MLQUEUE_HOST_BUSY;
 315         }
 316
 317         flags = 0;
 318         if (sc->sc_data_direction == DMA_FROM_DEVICE)
 319                 flags = FCPIO_ICMND_RDDATA;
 320         else if (sc->sc_data_direction == DMA_TO_DEVICE)
 321                 flags = FCPIO_ICMND_WRDATA;
 322
 323         exch_flags = 0;
 324         if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
 325             (rp->flags & FC_RP_FLAGS_RETRY))
 326                 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
 327
 328         fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
 329                                          0, exch_flags, io_req->sgl_cnt,
 330                                          SCSI_SENSE_BUFFERSIZE,
 331                                          io_req->sgl_list_pa,
 332                                          io_req->sense_buf_pa,
 333                                          0, /* scsi cmd ref, always 0 */
 334                                          pri_tag, /* scsi pri and tag */
 335                                          flags, /* command flags */
 336                                          sc->cmnd, sc->cmd_len,
 337                                          scsi_bufflen(sc),
 338                                          fc_lun.scsi_lun, io_req->port_id,
 339                                          rport->maxframe_size, rp->r_a_tov,
 340                                          rp->e_d_tov);
 341
 342         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 343         return 0;
 344 }
 345
 346 /*
 347  * fnic_queuecommand
 348  * Routine to send a scsi cdb
 349  * Called with host_lock held and interrupts disabled.
 350  */
 351 int fnic_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
 352 {
 353         struct fc_lport *lp;
 354         struct fc_rport *rport;
 355         struct fnic_io_req *io_req;
 356         struct fnic *fnic;
 357         struct vnic_wq_copy *wq;
 358         int ret;
 359         int sg_count;
 360         unsigned long flags;
 361         unsigned long ptr;
 362
 363         rport = starget_to_rport(scsi_target(sc->device));
 364         ret = fc_remote_port_chkready(rport);
 365         if (ret) {
 366                 sc->result = ret;
 367                 done(sc);
 368                 return 0;
 369         }
 370
 371         lp = shost_priv(sc->device->host);
 372         if (lp->state != LPORT_ST_READY || !(lp->link_up))
 373                 return SCSI_MLQUEUE_HOST_BUSY;
 374
 375         /*
 376          * Release host lock, use driver resource specific locks from here.
 377          * Don't re-enable interrupts in case they were disabled prior to the
 378          * caller disabling them.
 379          */
 380         spin_unlock(lp->host->host_lock);
 381
 382         /* Get a new io_req for this SCSI IO */
 383         fnic = lport_priv(lp);
 384
 385         io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
 386         if (!io_req) {
 387                 ret = SCSI_MLQUEUE_HOST_BUSY;
 388                 goto out;
 389         }
 390         memset(io_req, 0, sizeof(*io_req));
 391
 392         /* Map the data buffer */
 393         sg_count = scsi_dma_map(sc);
 394         if (sg_count < 0) {
 395                 mempool_free(io_req, fnic->io_req_pool);
 396                 goto out;
 397         }
 398
 399         /* Determine the type of scatter/gather list we need */
 400         io_req->sgl_cnt = sg_count;
 401         io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
 402         if (sg_count > FNIC_DFLT_SG_DESC_CNT)
 403                 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
 404
 405         if (sg_count) {
 406                 io_req->sgl_list =
 407                         mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
 408                                       GFP_ATOMIC | GFP_DMA);
 409                 if (!io_req->sgl_list) {
 410                         ret = SCSI_MLQUEUE_HOST_BUSY;
 411                         scsi_dma_unmap(sc);
 412                         mempool_free(io_req, fnic->io_req_pool);
 413                         goto out;
 414                 }
 415
 416                 /* Cache sgl list allocated address before alignment */
 417                 io_req->sgl_list_alloc = io_req->sgl_list;
 418                 ptr = (unsigned long) io_req->sgl_list;
 419                 if (ptr % FNIC_SG_DESC_ALIGN) {
 420                         io_req->sgl_list = (struct host_sg_desc *)
 421                                 (((unsigned long) ptr
 422                                   + FNIC_SG_DESC_ALIGN - 1)
 423                                  & ~(FNIC_SG_DESC_ALIGN - 1));
 424                 }
 425         }
 426
 427         /* initialize rest of io_req */
 428         io_req->port_id = rport->port_id;
 429         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
 430         CMD_SP(sc) = (char *)io_req;
 431         sc->scsi_done = done;
 432
 433         /* create copy wq desc and enqueue it */
 434         wq = &fnic->wq_copy[0];
 435         ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
 436         if (ret) {
 437                 /*
 438                  * In case another thread cancelled the request,
 439                  * refetch the pointer under the lock.
 440                  */
 441                 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
 442
 443                 spin_lock_irqsave(io_lock, flags);
 444                 io_req = (struct fnic_io_req *)CMD_SP(sc);
 445                 CMD_SP(sc) = NULL;
 446                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 447                 spin_unlock_irqrestore(io_lock, flags);
 448                 if (io_req) {
 449                         fnic_release_ioreq_buf(fnic, io_req, sc);
 450                         mempool_free(io_req, fnic->io_req_pool);
 451                 }
 452         }
 453 out:
 454         /* acquire host lock before returning to SCSI */
 455         spin_lock(lp->host->host_lock);
 456         return ret;
 457 }
 458
 459 /*
 460  * fnic_fcpio_fw_reset_cmpl_handler
 461  * Routine to handle fw reset completion
 462  */
 463 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 464                                             struct fcpio_fw_req *desc)
 465 {
 466         u8 type;
 467         u8 hdr_status;
 468         struct fcpio_tag tag;
 469         int ret = 0;
 470         unsigned long flags;
 471
 472         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 473
 474         /* Clean up all outstanding io requests */
 475         fnic_cleanup_io(fnic, SCSI_NO_TAG);
 476
 477         spin_lock_irqsave(&fnic->fnic_lock, flags);
 478
 479         /* fnic should be in FC_TRANS_ETH_MODE */
 480         if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
 481                 /* Check status of reset completion */
 482                 if (!hdr_status) {
 483                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 484                                       "reset cmpl success\n");
 485                         /* Ready to send flogi out */
 486                         fnic->state = FNIC_IN_ETH_MODE;
 487                 } else {
 488                         FNIC_SCSI_DBG(KERN_DEBUG,
 489                                       fnic->lport->host,
 490                                       "fnic fw_reset : failed %s\n",
 491                                       fnic_fcpio_status_to_str(hdr_status));
 492
 493                         /*
 494                          * Unable to change to eth mode, cannot send out flogi
 495                          * Change state to fc mode, so that subsequent Flogi
 496                          * requests from libFC will cause more attempts to
 497                          * reset the firmware. Free the cached flogi
 498                          */
 499                         fnic->state = FNIC_IN_FC_MODE;
 500                         ret = -1;
 501                 }
 502         } else {
 503                 FNIC_SCSI_DBG(KERN_DEBUG,
 504                               fnic->lport->host,
 505                               "Unexpected state %s while processing"
 506                               " reset cmpl\n", fnic_state_to_str(fnic->state));
 507                 ret = -1;
 508         }
 509
 510         /* Thread removing device blocks till firmware reset is complete */
 511         if (fnic->remove_wait)
 512                 complete(fnic->remove_wait);
 513
 514         /*
 515          * If fnic is being removed, or fw reset failed
 516          * free the flogi frame. Else, send it out
 517          */
 518         if (fnic->remove_wait || ret) {
 519                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 520                 skb_queue_purge(&fnic->tx_queue);
 521                 goto reset_cmpl_handler_end;
 522         }
 523
 524         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 525
 526         fnic_flush_tx(fnic);
 527
 528  reset_cmpl_handler_end:
 529         return ret;
 530 }
 531
 532 /*
 533  * fnic_fcpio_flogi_reg_cmpl_handler
 534  * Routine to handle flogi register completion
 535  */
 536 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
 537                                              struct fcpio_fw_req *desc)
 538 {
 539         u8 type;
 540         u8 hdr_status;
 541         struct fcpio_tag tag;
 542         int ret = 0;
 543         unsigned long flags;
 544
 545         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 546
 547         /* Update fnic state based on status of flogi reg completion */
 548         spin_lock_irqsave(&fnic->fnic_lock, flags);
 549
 550         if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
 551
 552                 /* Check flogi registration completion status */
 553                 if (!hdr_status) {
 554                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 555                                       "flog reg succeeded\n");
 556                         fnic->state = FNIC_IN_FC_MODE;
 557                 } else {
 558                         FNIC_SCSI_DBG(KERN_DEBUG,
 559                                       fnic->lport->host,
 560                                       "fnic flogi reg :failed %s\n",
 561                                       fnic_fcpio_status_to_str(hdr_status));
 562                         fnic->state = FNIC_IN_ETH_MODE;
 563                         ret = -1;
 564                 }
 565         } else {
 566                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 567                               "Unexpected fnic state %s while"
 568                               " processing flogi reg completion\n",
 569                               fnic_state_to_str(fnic->state));
 570                 ret = -1;
 571         }
 572
 573         if (!ret) {
 574                 if (fnic->stop_rx_link_events) {
 575                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 576                         goto reg_cmpl_handler_end;
 577                 }
 578                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 579
 580                 fnic_flush_tx(fnic);
 581                 queue_work(fnic_event_queue, &fnic->frame_work);
 582         } else {
 583                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 584         }
 585
 586 reg_cmpl_handler_end:
 587         return ret;
 588 }
 589
 590 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
 591                                         u16 request_out)
 592 {
 593         if (wq->to_clean_index <= wq->to_use_index) {
 594                 /* out of range, stale request_out index */
 595                 if (request_out < wq->to_clean_index ||
 596                     request_out >= wq->to_use_index)
 597                         return 0;
 598         } else {
 599                 /* out of range, stale request_out index */
 600                 if (request_out < wq->to_clean_index &&
 601                     request_out >= wq->to_use_index)
 602                         return 0;
 603         }
 604         /* request_out index is in range */
 605         return 1;
 606 }
 607
 608
 609 /*
 610  * Mark that ack received and store the Ack index. If there are multiple
 611  * acks received before Tx thread cleans it up, the latest value will be
 612  * used which is correct behavior. This state should be in the copy Wq
 613  * instead of in the fnic
 614  */
 615 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
 616                                           unsigned int cq_index,
 617                                           struct fcpio_fw_req *desc)
 618 {
 619         struct vnic_wq_copy *wq;
 620         u16 request_out = desc->u.ack.request_out;
 621         unsigned long flags;
 622
 623         /* mark the ack state */
 624         wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
 625         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 626
 627         if (is_ack_index_in_range(wq, request_out)) {
 628                 fnic->fw_ack_index[0] = request_out;
 629                 fnic->fw_ack_recd[0] = 1;
 630         }
 631         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 632 }
 633
 634 /*
 635  * fnic_fcpio_icmnd_cmpl_handler
 636  * Routine to handle icmnd completions
 637  */
 638 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
 639                                          struct fcpio_fw_req *desc)
 640 {
 641         u8 type;
 642         u8 hdr_status;
 643         struct fcpio_tag tag;
 644         u32 id;
 645         u64 xfer_len = 0;
 646         struct fcpio_icmnd_cmpl *icmnd_cmpl;
 647         struct fnic_io_req *io_req;
 648         struct scsi_cmnd *sc;
 649         unsigned long flags;
 650         spinlock_t *io_lock;
 651
 652         /* Decode the cmpl description to get the io_req id */
 653         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 654         fcpio_tag_id_dec(&tag, &id);
 655
 656         if (id >= FNIC_MAX_IO_REQ)
 657                 return;
 658
 659         sc = scsi_host_find_tag(fnic->lport->host, id);
 660         WARN_ON_ONCE(!sc);
 661         if (!sc)
 662                 return;
 663
 664         io_lock = fnic_io_lock_hash(fnic, sc);
 665         spin_lock_irqsave(io_lock, flags);
 666         io_req = (struct fnic_io_req *)CMD_SP(sc);
 667         WARN_ON_ONCE(!io_req);
 668         if (!io_req) {
 669                 spin_unlock_irqrestore(io_lock, flags);
 670                 return;
 671         }
 672
 673         /* firmware completed the io */
 674         io_req->io_completed = 1;
 675
 676         /*
 677          *  if SCSI-ML has already issued abort on this command,
 678          * ignore completion of the IO. The abts path will clean it up
 679          */
 680         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
 681                 spin_unlock_irqrestore(io_lock, flags);
 682                 return;
 683         }
 684
 685         /* Mark the IO as complete */
 686         CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 687
 688         icmnd_cmpl = &desc->u.icmnd_cmpl;
 689
 690         switch (hdr_status) {
 691         case FCPIO_SUCCESS:
 692                 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
 693                 xfer_len = scsi_bufflen(sc);
 694                 scsi_set_resid(sc, icmnd_cmpl->residual);
 695
 696                 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
 697                         xfer_len -= icmnd_cmpl->residual;
 698
 699                 /*
 700                  * If queue_full, then try to reduce queue depth for all
 701                  * LUNS on the target. Todo: this should be accompanied
 702                  * by a periodic queue_depth rampup based on successful
 703                  * IO completion.
 704                  */
 705                 if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
 706                         struct scsi_device *t_sdev;
 707                         int qd = 0;
 708
 709                         shost_for_each_device(t_sdev, sc->device->host) {
 710                                 if (t_sdev->id != sc->device->id)
 711                                         continue;
 712
 713                                 if (t_sdev->queue_depth > 1) {
 714                                         qd = scsi_track_queue_full
 715                                                 (t_sdev,
 716                                                  t_sdev->queue_depth - 1);
 717                                         if (qd == -1)
 718                                                 qd = t_sdev->host->cmd_per_lun;
 719                                         shost_printk(KERN_INFO,
 720                                                      fnic->lport->host,
 721                                                      "scsi[%d:%d:%d:%d"
 722                                                      "] queue full detected,"
 723                                                      "new depth = %d\n",
 724                                                      t_sdev->host->host_no,
 725                                                      t_sdev->channel,
 726                                                      t_sdev->id, t_sdev->lun,
 727                                                      t_sdev->queue_depth);
 728                                 }
 729                         }
 730                 }
 731                 break;
 732
 733         case FCPIO_TIMEOUT:          /* request was timed out */
 734                 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
 735                 break;
 736
 737         case FCPIO_ABORTED:          /* request was aborted */
 738                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 739                 break;
 740
 741         case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
 742                 scsi_set_resid(sc, icmnd_cmpl->residual);
 743                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 744                 break;
 745
 746         case FCPIO_OUT_OF_RESOURCE:  /* out of resources to complete request */
 747                 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
 748                 break;
 749         case FCPIO_INVALID_HEADER:   /* header contains invalid data */
 750         case FCPIO_INVALID_PARAM:    /* some parameter in request invalid */
 751         case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
 752         case FCPIO_IO_NOT_FOUND:     /* requested I/O was not found */
 753         case FCPIO_SGL_INVALID:      /* request was aborted due to sgl error */
 754         case FCPIO_MSS_INVALID:      /* request was aborted due to mss error */
 755         case FCPIO_FW_ERR:           /* request was terminated due fw error */
 756         default:
 757                 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
 758                              fnic_fcpio_status_to_str(hdr_status));
 759                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 760                 break;
 761         }
 762
 763         /* Break link with the SCSI command */
 764         CMD_SP(sc) = NULL;
 765
 766         spin_unlock_irqrestore(io_lock, flags);
 767
 768         fnic_release_ioreq_buf(fnic, io_req, sc);
 769
 770         mempool_free(io_req, fnic->io_req_pool);
 771
 772         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
 773                 fnic->lport->host_stats.fcp_input_requests++;
 774                 fnic->fcp_input_bytes += xfer_len;
 775         } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
 776                 fnic->lport->host_stats.fcp_output_requests++;
 777                 fnic->fcp_output_bytes += xfer_len;
 778         } else
 779                 fnic->lport->host_stats.fcp_control_requests++;
 780
 781         /* Call SCSI completion function to complete the IO */
 782         if (sc->scsi_done)
 783                 sc->scsi_done(sc);
 784
 785 }
 786
 787 /* fnic_fcpio_itmf_cmpl_handler
 788  * Routine to handle itmf completions
 789  */
 790 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
 791                                         struct fcpio_fw_req *desc)
 792 {
 793         u8 type;
 794         u8 hdr_status;
 795         struct fcpio_tag tag;
 796         u32 id;
 797         struct scsi_cmnd *sc;
 798         struct fnic_io_req *io_req;
 799         unsigned long flags;
 800         spinlock_t *io_lock;
 801
 802         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 803         fcpio_tag_id_dec(&tag, &id);
 804
 805         if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
 806                 return;
 807
 808         sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
 809         WARN_ON_ONCE(!sc);
 810         if (!sc)
 811                 return;
 812
 813         io_lock = fnic_io_lock_hash(fnic, sc);
 814         spin_lock_irqsave(io_lock, flags);
 815         io_req = (struct fnic_io_req *)CMD_SP(sc);
 816         WARN_ON_ONCE(!io_req);
 817         if (!io_req) {
 818                 spin_unlock_irqrestore(io_lock, flags);
 819                 return;
 820         }
 821
 822         if (id & FNIC_TAG_ABORT) {
 823                 /* Completion of abort cmd */
 824                 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
 825                         /* This is a late completion. Ignore it */
 826                         spin_unlock_irqrestore(io_lock, flags);
 827                         return;
 828                 }
 829                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
 830                 CMD_ABTS_STATUS(sc) = hdr_status;
 831
 832                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 833                               "abts cmpl recd. id %d status %s\n",
 834                               (int)(id & FNIC_TAG_MASK),
 835                               fnic_fcpio_status_to_str(hdr_status));
 836
 837                 /*
 838                  * If scsi_eh thread is blocked waiting for abts to complete,
 839                  * signal completion to it. IO will be cleaned in the thread
 840                  * else clean it in this context
 841                  */
 842                 if (io_req->abts_done) {
 843                         complete(io_req->abts_done);
 844                         spin_unlock_irqrestore(io_lock, flags);
 845                 } else {
 846                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 847                                       "abts cmpl, completing IO\n");
 848                         CMD_SP(sc) = NULL;
 849                         sc->result = (DID_ERROR << 16);
 850
 851                         spin_unlock_irqrestore(io_lock, flags);
 852
 853                         fnic_release_ioreq_buf(fnic, io_req, sc);
 854                         mempool_free(io_req, fnic->io_req_pool);
 855                         if (sc->scsi_done)
 856                                 sc->scsi_done(sc);
 857                 }
 858
 859         } else if (id & FNIC_TAG_DEV_RST) {
 860                 /* Completion of device reset */
 861                 CMD_LR_STATUS(sc) = hdr_status;
 862                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 863                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 864                               "dev reset cmpl recd. id %d status %s\n",
 865                               (int)(id & FNIC_TAG_MASK),
 866                               fnic_fcpio_status_to_str(hdr_status));
 867                 if (io_req->dr_done)
 868                         complete(io_req->dr_done);
 869                 spin_unlock_irqrestore(io_lock, flags);
 870
 871         } else {
 872                 shost_printk(KERN_ERR, fnic->lport->host,
 873                              "Unexpected itmf io state %s tag %x\n",
 874                              fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
 875                 spin_unlock_irqrestore(io_lock, flags);
 876         }
 877
 878 }
 879
 880 /*
 881  * fnic_fcpio_cmpl_handler
 882  * Routine to service the cq for wq_copy
 883  */
 884 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
 885                                    unsigned int cq_index,
 886                                    struct fcpio_fw_req *desc)
 887 {
 888         struct fnic *fnic = vnic_dev_priv(vdev);
 889         int ret = 0;
 890
 891         switch (desc->hdr.type) {
 892         case FCPIO_ACK: /* fw copied copy wq desc to its queue */
 893                 fnic_fcpio_ack_handler(fnic, cq_index, desc);
 894                 break;
 895
 896         case FCPIO_ICMND_CMPL: /* fw completed a command */
 897                 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
 898                 break;
 899
 900         case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
 901                 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
 902                 break;
 903
 904         case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
 905         case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
 906                 ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
 907                 break;
 908
 909         case FCPIO_RESET_CMPL: /* fw completed reset */
 910                 ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
 911                 break;
 912
 913         default:
 914                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 915                               "firmware completion type %d\n",
 916                               desc->hdr.type);
 917                 break;
 918         }
 919
 920         return ret;
 921 }
 922
 923 /*
 924  * fnic_wq_copy_cmpl_handler
 925  * Routine to process wq copy
 926  */
 927 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
 928 {
 929         unsigned int wq_work_done = 0;
 930         unsigned int i, cq_index;
 931         unsigned int cur_work_done;
 932
 933         for (i = 0; i < fnic->wq_copy_count; i++) {
 934                 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
 935                 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
 936                                                      fnic_fcpio_cmpl_handler,
 937                                                      copy_work_to_do);
 938                 wq_work_done += cur_work_done;
 939         }
 940         return wq_work_done;
 941 }
 942
 943 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
 944 {
 945         unsigned int i;
 946         struct fnic_io_req *io_req;
 947         unsigned long flags = 0;
 948         struct scsi_cmnd *sc;
 949         spinlock_t *io_lock;
 950
 951         for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
 952                 if (i == exclude_id)
 953                         continue;
 954
 955                 sc = scsi_host_find_tag(fnic->lport->host, i);
 956                 if (!sc)
 957                         continue;
 958
 959                 io_lock = fnic_io_lock_hash(fnic, sc);
 960                 spin_lock_irqsave(io_lock, flags);
 961                 io_req = (struct fnic_io_req *)CMD_SP(sc);
 962                 if (!io_req) {
 963                         spin_unlock_irqrestore(io_lock, flags);
 964                         goto cleanup_scsi_cmd;
 965                 }
 966
 967                 CMD_SP(sc) = NULL;
 968
 969                 spin_unlock_irqrestore(io_lock, flags);
 970
 971                 /*
 972                  * If there is a scsi_cmnd associated with this io_req, then
 973                  * free the corresponding state
 974                  */
 975                 fnic_release_ioreq_buf(fnic, io_req, sc);
 976                 mempool_free(io_req, fnic->io_req_pool);
 977
 978 cleanup_scsi_cmd:
 979                 sc->result = DID_TRANSPORT_DISRUPTED << 16;
 980                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
 981                               " DID_TRANSPORT_DISRUPTED\n");
 982
 983                 /* Complete the command to SCSI */
 984                 if (sc->scsi_done)
 985                         sc->scsi_done(sc);
 986         }
 987 }
 988
 989 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
 990                                   struct fcpio_host_req *desc)
 991 {
 992         u32 id;
 993         struct fnic *fnic = vnic_dev_priv(wq->vdev);
 994         struct fnic_io_req *io_req;
 995         struct scsi_cmnd *sc;
 996         unsigned long flags;
 997         spinlock_t *io_lock;
 998
 999         /* get the tag reference */
1000         fcpio_tag_id_dec(&desc->hdr.tag, &id);
1001         id &= FNIC_TAG_MASK;
1002
1003         if (id >= FNIC_MAX_IO_REQ)
1004                 return;
1005
1006         sc = scsi_host_find_tag(fnic->lport->host, id);
1007         if (!sc)
1008                 return;
1009
1010         io_lock = fnic_io_lock_hash(fnic, sc);
1011         spin_lock_irqsave(io_lock, flags);
1012
1013         /* Get the IO context which this desc refers to */
1014         io_req = (struct fnic_io_req *)CMD_SP(sc);
1015
1016         /* fnic interrupts are turned off by now */
1017
1018         if (!io_req) {
1019                 spin_unlock_irqrestore(io_lock, flags);
1020                 goto wq_copy_cleanup_scsi_cmd;
1021         }
1022
1023         CMD_SP(sc) = NULL;
1024
1025         spin_unlock_irqrestore(io_lock, flags);
1026
1027         fnic_release_ioreq_buf(fnic, io_req, sc);
1028         mempool_free(io_req, fnic->io_req_pool);
1029
1030 wq_copy_cleanup_scsi_cmd:
1031         sc->result = DID_NO_CONNECT << 16;
1032         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1033                       " DID_NO_CONNECT\n");
1034
1035         if (sc->scsi_done)
1036                 sc->scsi_done(sc);
1037 }
1038
1039 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1040                                           u32 task_req, u8 *fc_lun,
1041                                           struct fnic_io_req *io_req)
1042 {
1043         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1044         unsigned long flags;
1045
1046         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1047
1048         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1049                 free_wq_copy_descs(fnic, wq);
1050
1051         if (!vnic_wq_copy_desc_avail(wq)) {
1052                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1053                 return 1;
1054         }
1055         fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1056                                      0, task_req, tag, fc_lun, io_req->port_id,
1057                                      fnic->config.ra_tov, fnic->config.ed_tov);
1058
1059         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1060         return 0;
1061 }
1062
1063 void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1064 {
1065         int tag;
1066         struct fnic_io_req *io_req;
1067         spinlock_t *io_lock;
1068         unsigned long flags;
1069         struct scsi_cmnd *sc;
1070         struct scsi_lun fc_lun;
1071         enum fnic_ioreq_state old_ioreq_state;
1072
1073         FNIC_SCSI_DBG(KERN_DEBUG,
1074                       fnic->lport->host,
1075                       "fnic_rport_reset_exch called portid 0x%06x\n",
1076                       port_id);
1077
1078         if (fnic->in_remove)
1079                 return;
1080
1081         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1082                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1083                 if (!sc)
1084                         continue;
1085
1086                 io_lock = fnic_io_lock_hash(fnic, sc);
1087                 spin_lock_irqsave(io_lock, flags);
1088
1089                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1090
1091                 if (!io_req || io_req->port_id != port_id) {
1092                         spin_unlock_irqrestore(io_lock, flags);
1093                         continue;
1094                 }
1095
1096                 /*
1097                  * Found IO that is still pending with firmware and
1098                  * belongs to rport that went away
1099                  */
1100                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1101                         spin_unlock_irqrestore(io_lock, flags);
1102                         continue;
1103                 }
1104                 old_ioreq_state = CMD_STATE(sc);
1105                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1106                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1107
1108                 BUG_ON(io_req->abts_done);
1109
1110                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1111                               "fnic_rport_reset_exch: Issuing abts\n");
1112
1113                 spin_unlock_irqrestore(io_lock, flags);
1114
1115                 /* Now queue the abort command to firmware */
1116                 int_to_scsilun(sc->device->lun, &fc_lun);
1117
1118                 if (fnic_queue_abort_io_req(fnic, tag,
1119                                             FCPIO_ITMF_ABT_TASK_TERM,
1120                                             fc_lun.scsi_lun, io_req)) {
1121                         /*
1122                          * Revert the cmd state back to old state, if
1123                          * it hasnt changed in between. This cmd will get
1124                          * aborted later by scsi_eh, or cleaned up during
1125                          * lun reset
1126                          */
1127                         io_lock = fnic_io_lock_hash(fnic, sc);
1128
1129                         spin_lock_irqsave(io_lock, flags);
1130                         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1131                                 CMD_STATE(sc) = old_ioreq_state;
1132                         spin_unlock_irqrestore(io_lock, flags);
1133                 }
1134         }
1135
1136 }
1137
1138 void fnic_terminate_rport_io(struct fc_rport *rport)
1139 {
1140         int tag;
1141         struct fnic_io_req *io_req;
1142         spinlock_t *io_lock;
1143         unsigned long flags;
1144         struct scsi_cmnd *sc;
1145         struct scsi_lun fc_lun;
1146         struct fc_rport_libfc_priv *rdata = rport->dd_data;
1147         struct fc_lport *lport = rdata->local_port;
1148         struct fnic *fnic = lport_priv(lport);
1149         struct fc_rport *cmd_rport;
1150         enum fnic_ioreq_state old_ioreq_state;
1151
1152         FNIC_SCSI_DBG(KERN_DEBUG,
1153                       fnic->lport->host, "fnic_terminate_rport_io called"
1154                       " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
1155                       rport->port_name, rport->node_name,
1156                       rport->port_id);
1157
1158         if (fnic->in_remove)
1159                 return;
1160
1161         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1162                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1163                 if (!sc)
1164                         continue;
1165
1166                 cmd_rport = starget_to_rport(scsi_target(sc->device));
1167                 if (rport != cmd_rport)
1168                         continue;
1169
1170                 io_lock = fnic_io_lock_hash(fnic, sc);
1171                 spin_lock_irqsave(io_lock, flags);
1172
1173                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1174
1175                 if (!io_req || rport != cmd_rport) {
1176                         spin_unlock_irqrestore(io_lock, flags);
1177                         continue;
1178                 }
1179
1180                 /*
1181                  * Found IO that is still pending with firmware and
1182                  * belongs to rport that went away
1183                  */
1184                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1185                         spin_unlock_irqrestore(io_lock, flags);
1186                         continue;
1187                 }
1188                 old_ioreq_state = CMD_STATE(sc);
1189                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1190                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1191
1192                 BUG_ON(io_req->abts_done);
1193
1194                 FNIC_SCSI_DBG(KERN_DEBUG,
1195                               fnic->lport->host,
1196                               "fnic_terminate_rport_io: Issuing abts\n");
1197
1198                 spin_unlock_irqrestore(io_lock, flags);
1199
1200                 /* Now queue the abort command to firmware */
1201                 int_to_scsilun(sc->device->lun, &fc_lun);
1202
1203                 if (fnic_queue_abort_io_req(fnic, tag,
1204                                             FCPIO_ITMF_ABT_TASK_TERM,
1205                                             fc_lun.scsi_lun, io_req)) {
1206                         /*
1207                          * Revert the cmd state back to old state, if
1208                          * it hasnt changed in between. This cmd will get
1209                          * aborted later by scsi_eh, or cleaned up during
1210                          * lun reset
1211                          */
1212                         io_lock = fnic_io_lock_hash(fnic, sc);
1213
1214                         spin_lock_irqsave(io_lock, flags);
1215                         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1216                                 CMD_STATE(sc) = old_ioreq_state;
1217                         spin_unlock_irqrestore(io_lock, flags);
1218                 }
1219         }
1220
1221 }
1222
1223 /*
1224  * This function is exported to SCSI for sending abort cmnds.
1225  * A SCSI IO is represented by a io_req in the driver.
1226  * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1227  */
1228 int fnic_abort_cmd(struct scsi_cmnd *sc)
1229 {
1230         struct fc_lport *lp;
1231         struct fnic *fnic;
1232         struct fnic_io_req *io_req;
1233         struct fc_rport *rport;
1234         spinlock_t *io_lock;
1235         unsigned long flags;
1236         int ret = SUCCESS;
1237         u32 task_req;
1238         struct scsi_lun fc_lun;
1239         DECLARE_COMPLETION_ONSTACK(tm_done);
1240
1241         /* Wait for rport to unblock */
1242         fc_block_scsi_eh(sc);
1243
1244         /* Get local-port, check ready and link up */
1245         lp = shost_priv(sc->device->host);
1246
1247         fnic = lport_priv(lp);
1248         FNIC_SCSI_DBG(KERN_DEBUG,
1249                       fnic->lport->host,
1250                       "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
1251                       (starget_to_rport(scsi_target(sc->device)))->port_id,
1252                       sc->device->lun, sc->request->tag);
1253
1254         if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1255                 ret = FAILED;
1256                 goto fnic_abort_cmd_end;
1257         }
1258
1259         /*
1260          * Avoid a race between SCSI issuing the abort and the device
1261          * completing the command.
1262          *
1263          * If the command is already completed by the fw cmpl code,
1264          * we just return SUCCESS from here. This means that the abort
1265          * succeeded. In the SCSI ML, since the timeout for command has
1266          * happened, the completion wont actually complete the command
1267          * and it will be considered as an aborted command
1268          *
1269          * The CMD_SP will not be cleared except while holding io_req_lock.
1270          */
1271         io_lock = fnic_io_lock_hash(fnic, sc);
1272         spin_lock_irqsave(io_lock, flags);
1273         io_req = (struct fnic_io_req *)CMD_SP(sc);
1274         if (!io_req) {
1275                 spin_unlock_irqrestore(io_lock, flags);
1276                 goto fnic_abort_cmd_end;
1277         }
1278
1279         io_req->abts_done = &tm_done;
1280
1281         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1282                 spin_unlock_irqrestore(io_lock, flags);
1283                 goto wait_pending;
1284         }
1285         /*
1286          * Command is still pending, need to abort it
1287          * If the firmware completes the command after this point,
1288          * the completion wont be done till mid-layer, since abort
1289          * has already started.
1290          */
1291         CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1292         CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1293
1294         spin_unlock_irqrestore(io_lock, flags);
1295
1296         /*
1297          * Check readiness of the remote port. If the path to remote
1298          * port is up, then send abts to the remote port to terminate
1299          * the IO. Else, just locally terminate the IO in the firmware
1300          */
1301         rport = starget_to_rport(scsi_target(sc->device));
1302         if (fc_remote_port_chkready(rport) == 0)
1303                 task_req = FCPIO_ITMF_ABT_TASK;
1304         else
1305                 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1306
1307         /* Now queue the abort command to firmware */
1308         int_to_scsilun(sc->device->lun, &fc_lun);
1309
1310         if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1311                                     fc_lun.scsi_lun, io_req)) {
1312                 spin_lock_irqsave(io_lock, flags);
1313                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1314                 if (io_req)
1315                         io_req->abts_done = NULL;
1316                 spin_unlock_irqrestore(io_lock, flags);
1317                 ret = FAILED;
1318                 goto fnic_abort_cmd_end;
1319         }
1320
1321         /*
1322          * We queued an abort IO, wait for its completion.
1323          * Once the firmware completes the abort command, it will
1324          * wake up this thread.
1325          */
1326  wait_pending:
1327         wait_for_completion_timeout(&tm_done,
1328                                     msecs_to_jiffies
1329                                     (2 * fnic->config.ra_tov +
1330                                      fnic->config.ed_tov));
1331
1332         /* Check the abort status */
1333         spin_lock_irqsave(io_lock, flags);
1334
1335         io_req = (struct fnic_io_req *)CMD_SP(sc);
1336         if (!io_req) {
1337                 spin_unlock_irqrestore(io_lock, flags);
1338                 ret = FAILED;
1339                 goto fnic_abort_cmd_end;
1340         }
1341         io_req->abts_done = NULL;
1342
1343         /* fw did not complete abort, timed out */
1344         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1345                 spin_unlock_irqrestore(io_lock, flags);
1346                 ret = FAILED;
1347                 goto fnic_abort_cmd_end;
1348         }
1349
1350         /*
1351          * firmware completed the abort, check the status,
1352          * free the io_req irrespective of failure or success
1353          */
1354         if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1355                 ret = FAILED;
1356
1357         CMD_SP(sc) = NULL;
1358
1359         spin_unlock_irqrestore(io_lock, flags);
1360
1361         fnic_release_ioreq_buf(fnic, io_req, sc);
1362         mempool_free(io_req, fnic->io_req_pool);
1363
1364 fnic_abort_cmd_end:
1365         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1366                       "Returning from abort cmd %s\n",
1367                       (ret == SUCCESS) ?
1368                       "SUCCESS" : "FAILED");
1369         return ret;
1370 }
1371
1372 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1373                                        struct scsi_cmnd *sc,
1374                                        struct fnic_io_req *io_req)
1375 {
1376         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1377         struct scsi_lun fc_lun;
1378         int ret = 0;
1379         unsigned long intr_flags;
1380
1381         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1382
1383         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1384                 free_wq_copy_descs(fnic, wq);
1385
1386         if (!vnic_wq_copy_desc_avail(wq)) {
1387                 ret = -EAGAIN;
1388                 goto lr_io_req_end;
1389         }
1390
1391         /* fill in the lun info */
1392         int_to_scsilun(sc->device->lun, &fc_lun);
1393
1394         fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1395                                      0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1396                                      fc_lun.scsi_lun, io_req->port_id,
1397                                      fnic->config.ra_tov, fnic->config.ed_tov);
1398
1399 lr_io_req_end:
1400         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1401
1402         return ret;
1403 }
1404
1405 /*
1406  * Clean up any pending aborts on the lun
1407  * For each outstanding IO on this lun, whose abort is not completed by fw,
1408  * issue a local abort. Wait for abort to complete. Return 0 if all commands
1409  * successfully aborted, 1 otherwise
1410  */
1411 static int fnic_clean_pending_aborts(struct fnic *fnic,
1412                                      struct scsi_cmnd *lr_sc)
1413 {
1414         int tag;
1415         struct fnic_io_req *io_req;
1416         spinlock_t *io_lock;
1417         unsigned long flags;
1418         int ret = 0;
1419         struct scsi_cmnd *sc;
1420         struct fc_rport *rport;
1421         struct scsi_lun fc_lun;
1422         struct scsi_device *lun_dev = lr_sc->device;
1423         DECLARE_COMPLETION_ONSTACK(tm_done);
1424
1425         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1426                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1427                 /*
1428                  * ignore this lun reset cmd or cmds that do not belong to
1429                  * this lun
1430                  */
1431                 if (!sc || sc == lr_sc || sc->device != lun_dev)
1432                         continue;
1433
1434                 io_lock = fnic_io_lock_hash(fnic, sc);
1435                 spin_lock_irqsave(io_lock, flags);
1436
1437                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1438
1439                 if (!io_req || sc->device != lun_dev) {
1440                         spin_unlock_irqrestore(io_lock, flags);
1441                         continue;
1442                 }
1443
1444                 /*
1445                  * Found IO that is still pending with firmware and
1446                  * belongs to the LUN that we are resetting
1447                  */
1448                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1449                               "Found IO in %s on lun\n",
1450                               fnic_ioreq_state_to_str(CMD_STATE(sc)));
1451
1452                 BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING);
1453
1454                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1455                 io_req->abts_done = &tm_done;
1456                 spin_unlock_irqrestore(io_lock, flags);
1457
1458                 /* Now queue the abort command to firmware */
1459                 int_to_scsilun(sc->device->lun, &fc_lun);
1460                 rport = starget_to_rport(scsi_target(sc->device));
1461
1462                 if (fnic_queue_abort_io_req(fnic, tag,
1463                                             FCPIO_ITMF_ABT_TASK_TERM,
1464                                             fc_lun.scsi_lun, io_req)) {
1465                         spin_lock_irqsave(io_lock, flags);
1466                         io_req = (struct fnic_io_req *)CMD_SP(sc);
1467                         if (io_req)
1468                                 io_req->abts_done = NULL;
1469                         spin_unlock_irqrestore(io_lock, flags);
1470                         ret = 1;
1471                         goto clean_pending_aborts_end;
1472                 }
1473
1474                 wait_for_completion_timeout(&tm_done,
1475                                             msecs_to_jiffies
1476                                             (fnic->config.ed_tov));
1477
1478                 /* Recheck cmd state to check if it is now aborted */
1479                 spin_lock_irqsave(io_lock, flags);
1480                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1481                 if (!io_req) {
1482                         spin_unlock_irqrestore(io_lock, flags);
1483                         ret = 1;
1484                         goto clean_pending_aborts_end;
1485                 }
1486
1487                 io_req->abts_done = NULL;
1488
1489                 /* if abort is still pending with fw, fail */
1490                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1491                         spin_unlock_irqrestore(io_lock, flags);
1492                         ret = 1;
1493                         goto clean_pending_aborts_end;
1494                 }
1495                 CMD_SP(sc) = NULL;
1496                 spin_unlock_irqrestore(io_lock, flags);
1497
1498                 fnic_release_ioreq_buf(fnic, io_req, sc);
1499                 mempool_free(io_req, fnic->io_req_pool);
1500         }
1501
1502 clean_pending_aborts_end:
1503         return ret;
1504 }
1505
1506 /*
1507  * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
1508  * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
1509  * on the LUN.
1510  */
1511 int fnic_device_reset(struct scsi_cmnd *sc)
1512 {
1513         struct fc_lport *lp;
1514         struct fnic *fnic;
1515         struct fnic_io_req *io_req;
1516         struct fc_rport *rport;
1517         int status;
1518         int ret = FAILED;
1519         spinlock_t *io_lock;
1520         unsigned long flags;
1521         DECLARE_COMPLETION_ONSTACK(tm_done);
1522
1523         /* Wait for rport to unblock */
1524         fc_block_scsi_eh(sc);
1525
1526         /* Get local-port, check ready and link up */
1527         lp = shost_priv(sc->device->host);
1528
1529         fnic = lport_priv(lp);
1530         FNIC_SCSI_DBG(KERN_DEBUG,
1531                       fnic->lport->host,
1532                       "Device reset called FCID 0x%x, LUN 0x%x\n",
1533                       (starget_to_rport(scsi_target(sc->device)))->port_id,
1534                       sc->device->lun);
1535
1536
1537         if (lp->state != LPORT_ST_READY || !(lp->link_up))
1538                 goto fnic_device_reset_end;
1539
1540         /* Check if remote port up */
1541         rport = starget_to_rport(scsi_target(sc->device));
1542         if (fc_remote_port_chkready(rport))
1543                 goto fnic_device_reset_end;
1544
1545         io_lock = fnic_io_lock_hash(fnic, sc);
1546         spin_lock_irqsave(io_lock, flags);
1547         io_req = (struct fnic_io_req *)CMD_SP(sc);
1548
1549         /*
1550          * If there is a io_req attached to this command, then use it,
1551          * else allocate a new one.
1552          */
1553         if (!io_req) {
1554                 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
1555                 if (!io_req) {
1556                         spin_unlock_irqrestore(io_lock, flags);
1557                         goto fnic_device_reset_end;
1558                 }
1559                 memset(io_req, 0, sizeof(*io_req));
1560                 io_req->port_id = rport->port_id;
1561                 CMD_SP(sc) = (char *)io_req;
1562         }
1563         io_req->dr_done = &tm_done;
1564         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
1565         CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
1566         spin_unlock_irqrestore(io_lock, flags);
1567
1568         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n",
1569                       sc->request->tag);
1570
1571         /*
1572          * issue the device reset, if enqueue failed, clean up the ioreq
1573          * and break assoc with scsi cmd
1574          */
1575         if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
1576                 spin_lock_irqsave(io_lock, flags);
1577                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1578                 if (io_req)
1579                         io_req->dr_done = NULL;
1580                 goto fnic_device_reset_clean;
1581         }
1582
1583         /*
1584          * Wait on the local completion for LUN reset.  The io_req may be
1585          * freed while we wait since we hold no lock.
1586          */
1587         wait_for_completion_timeout(&tm_done,
1588                                     msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
1589
1590         spin_lock_irqsave(io_lock, flags);
1591         io_req = (struct fnic_io_req *)CMD_SP(sc);
1592         if (!io_req) {
1593                 spin_unlock_irqrestore(io_lock, flags);
1594                 goto fnic_device_reset_end;
1595         }
1596         io_req->dr_done = NULL;
1597
1598         status = CMD_LR_STATUS(sc);
1599         spin_unlock_irqrestore(io_lock, flags);
1600
1601         /*
1602          * If lun reset not completed, bail out with failed. io_req
1603          * gets cleaned up during higher levels of EH
1604          */
1605         if (status == FCPIO_INVALID_CODE) {
1606                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1607                               "Device reset timed out\n");
1608                 goto fnic_device_reset_end;
1609         }
1610
1611         /* Completed, but not successful, clean up the io_req, return fail */
1612         if (status != FCPIO_SUCCESS) {
1613                 spin_lock_irqsave(io_lock, flags);
1614                 FNIC_SCSI_DBG(KERN_DEBUG,
1615                               fnic->lport->host,
1616                               "Device reset completed - failed\n");
1617                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1618                 goto fnic_device_reset_clean;
1619         }
1620
1621         /*
1622          * Clean up any aborts on this lun that have still not
1623          * completed. If any of these fail, then LUN reset fails.
1624          * clean_pending_aborts cleans all cmds on this lun except
1625          * the lun reset cmd. If all cmds get cleaned, the lun reset
1626          * succeeds
1627          */
1628         if (fnic_clean_pending_aborts(fnic, sc)) {
1629                 spin_lock_irqsave(io_lock, flags);
1630                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1631                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1632                               "Device reset failed"
1633                               " since could not abort all IOs\n");
1634                 goto fnic_device_reset_clean;
1635         }
1636
1637         /* Clean lun reset command */
1638         spin_lock_irqsave(io_lock, flags);
1639         io_req = (struct fnic_io_req *)CMD_SP(sc);
1640         if (io_req)
1641                 /* Completed, and successful */
1642                 ret = SUCCESS;
1643
1644 fnic_device_reset_clean:
1645         if (io_req)
1646                 CMD_SP(sc) = NULL;
1647
1648         spin_unlock_irqrestore(io_lock, flags);
1649
1650         if (io_req) {
1651                 fnic_release_ioreq_buf(fnic, io_req, sc);
1652                 mempool_free(io_req, fnic->io_req_pool);
1653         }
1654
1655 fnic_device_reset_end:
1656         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1657                       "Returning from device reset %s\n",
1658                       (ret == SUCCESS) ?
1659                       "SUCCESS" : "FAILED");
1660         return ret;
1661 }
1662
1663 /* Clean up all IOs, clean up libFC local port */
1664 int fnic_reset(struct Scsi_Host *shost)
1665 {
1666         struct fc_lport *lp;
1667         struct fnic *fnic;
1668         int ret = SUCCESS;
1669
1670         lp = shost_priv(shost);
1671         fnic = lport_priv(lp);
1672
1673         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1674                       "fnic_reset called\n");
1675
1676         /*
1677          * Reset local port, this will clean up libFC exchanges,
1678          * reset remote port sessions, and if link is up, begin flogi
1679          */
1680         if (lp->tt.lport_reset(lp))
1681                 ret = FAILED;
1682
1683         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1684                       "Returning from fnic reset %s\n",
1685                       (ret == SUCCESS) ?
1686                       "SUCCESS" : "FAILED");
1687
1688         return ret;
1689 }
1690
1691 /*
1692  * SCSI Error handling calls driver's eh_host_reset if all prior
1693  * error handling levels return FAILED. If host reset completes
1694  * successfully, and if link is up, then Fabric login begins.
1695  *
1696  * Host Reset is the highest level of error recovery. If this fails, then
1697  * host is offlined by SCSI.
1698  *
1699  */
1700 int fnic_host_reset(struct scsi_cmnd *sc)
1701 {
1702         int ret;
1703         unsigned long wait_host_tmo;
1704         struct Scsi_Host *shost = sc->device->host;
1705         struct fc_lport *lp = shost_priv(shost);
1706
1707         /*
1708          * If fnic_reset is successful, wait for fabric login to complete
1709          * scsi-ml tries to send a TUR to every device if host reset is
1710          * successful, so before returning to scsi, fabric should be up
1711          */
1712         ret = fnic_reset(shost);
1713         if (ret == SUCCESS) {
1714                 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
1715                 ret = FAILED;
1716                 while (time_before(jiffies, wait_host_tmo)) {
1717                         if ((lp->state == LPORT_ST_READY) &&
1718                             (lp->link_up)) {
1719                                 ret = SUCCESS;
1720                                 break;
1721                         }
1722                         ssleep(1);
1723                 }
1724         }
1725
1726         return ret;
1727 }
1728
1729 /*
1730  * This fxn is called from libFC when host is removed
1731  */
1732 void fnic_scsi_abort_io(struct fc_lport *lp)
1733 {
1734         int err = 0;
1735         unsigned long flags;
1736         enum fnic_state old_state;
1737         struct fnic *fnic = lport_priv(lp);
1738         DECLARE_COMPLETION_ONSTACK(remove_wait);
1739
1740         /* Issue firmware reset for fnic, wait for reset to complete */
1741         spin_lock_irqsave(&fnic->fnic_lock, flags);
1742         fnic->remove_wait = &remove_wait;
1743         old_state = fnic->state;
1744         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1745         fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
1746         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1747
1748         err = fnic_fw_reset_handler(fnic);
1749         if (err) {
1750                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1751                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1752                         fnic->state = old_state;
1753                 fnic->remove_wait = NULL;
1754                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1755                 return;
1756         }
1757
1758         /* Wait for firmware reset to complete */
1759         wait_for_completion_timeout(&remove_wait,
1760                                     msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
1761
1762         spin_lock_irqsave(&fnic->fnic_lock, flags);
1763         fnic->remove_wait = NULL;
1764         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1765                       "fnic_scsi_abort_io %s\n",
1766                       (fnic->state == FNIC_IN_ETH_MODE) ?
1767                       "SUCCESS" : "FAILED");
1768         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1769
1770 }
1771
1772 /*
1773  * This fxn called from libFC to clean up driver IO state on link down
1774  */
1775 void fnic_scsi_cleanup(struct fc_lport *lp)
1776 {
1777         unsigned long flags;
1778         enum fnic_state old_state;
1779         struct fnic *fnic = lport_priv(lp);
1780
1781         /* issue fw reset */
1782         spin_lock_irqsave(&fnic->fnic_lock, flags);
1783         old_state = fnic->state;
1784         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1785         fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
1786         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1787
1788         if (fnic_fw_reset_handler(fnic)) {
1789                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1790                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1791                         fnic->state = old_state;
1792                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1793         }
1794
1795 }
1796
1797 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
1798 {
1799 }
1800
1801 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
1802 {
1803         struct fnic *fnic = lport_priv(lp);
1804
1805         /* Non-zero sid, nothing to do */
1806         if (sid)
1807                 goto call_fc_exch_mgr_reset;
1808
1809         if (did) {
1810                 fnic_rport_exch_reset(fnic, did);
1811                 goto call_fc_exch_mgr_reset;
1812         }
1813
1814         /*
1815          * sid = 0, did = 0
1816          * link down or device being removed
1817          */
1818         if (!fnic->in_remove)
1819                 fnic_scsi_cleanup(lp);
1820         else
1821                 fnic_scsi_abort_io(lp);
1822
1823         /* call libFC exch mgr reset to reset its exchanges */
1824 call_fc_exch_mgr_reset:
1825         fc_exch_mgr_reset(lp, sid, did);
1826
1827 }