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         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 178
 179         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 180                 free_wq_copy_descs(fnic, wq);
 181
 182         if (!vnic_wq_copy_desc_avail(wq))
 183                 ret = -EAGAIN;
 184         else
 185                 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
 186
 187         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 188
 189         if (!ret)
 190                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 191                               "Issued fw reset\n");
 192         else
 193                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 194                               "Failed to issue fw reset\n");
 195         return ret;
 196 }
 197
 198
 199 /*
 200  * fnic_flogi_reg_handler
 201  * Routine to send flogi register msg to fw
 202  */
 203 int fnic_flogi_reg_handler(struct fnic *fnic)
 204 {
 205         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
 206         u8 gw_mac[ETH_ALEN];
 207         int ret = 0;
 208         unsigned long flags;
 209
 210         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 211
 212         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 213                 free_wq_copy_descs(fnic, wq);
 214
 215         if (!vnic_wq_copy_desc_avail(wq)) {
 216                 ret = -EAGAIN;
 217                 goto flogi_reg_ioreq_end;
 218         }
 219
 220         if (fnic->fcoui_mode)
 221                 memset(gw_mac, 0xff, ETH_ALEN);
 222         else
 223                 memcpy(gw_mac, fnic->dest_addr, ETH_ALEN);
 224
 225         fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
 226                                           FCPIO_FLOGI_REG_GW_DEST,
 227                                           fnic->s_id,
 228                                           gw_mac);
 229
 230 flogi_reg_ioreq_end:
 231         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 232
 233         if (!ret)
 234                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 235                               "flog reg issued\n");
 236
 237         return ret;
 238 }
 239
 240 /*
 241  * fnic_queue_wq_copy_desc
 242  * Routine to enqueue a wq copy desc
 243  */
 244 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
 245                                           struct vnic_wq_copy *wq,
 246                                           struct fnic_io_req *io_req,
 247                                           struct scsi_cmnd *sc,
 248                                           u32 sg_count)
 249 {
 250         struct scatterlist *sg;
 251         struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
 252         struct fc_rport_libfc_priv *rp = rport->dd_data;
 253         struct host_sg_desc *desc;
 254         u8 pri_tag = 0;
 255         unsigned int i;
 256         unsigned long intr_flags;
 257         int flags;
 258         u8 exch_flags;
 259         struct scsi_lun fc_lun;
 260         char msg[2];
 261
 262         if (sg_count) {
 263                 BUG_ON(sg_count < 0);
 264                 BUG_ON(sg_count > FNIC_MAX_SG_DESC_CNT);
 265
 266                 /* For each SGE, create a device desc entry */
 267                 desc = io_req->sgl_list;
 268                 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
 269                         desc->addr = cpu_to_le64(sg_dma_address(sg));
 270                         desc->len = cpu_to_le32(sg_dma_len(sg));
 271                         desc->_resvd = 0;
 272                         desc++;
 273                 }
 274
 275                 io_req->sgl_list_pa = pci_map_single
 276                         (fnic->pdev,
 277                          io_req->sgl_list,
 278                          sizeof(io_req->sgl_list[0]) * sg_count,
 279                          PCI_DMA_TODEVICE);
 280         }
 281
 282         io_req->sense_buf_pa = pci_map_single(fnic->pdev,
 283                                               sc->sense_buffer,
 284                                               SCSI_SENSE_BUFFERSIZE,
 285                                               PCI_DMA_FROMDEVICE);
 286
 287         int_to_scsilun(sc->device->lun, &fc_lun);
 288
 289         pri_tag = FCPIO_ICMND_PTA_SIMPLE;
 290         msg[0] = MSG_SIMPLE_TAG;
 291         scsi_populate_tag_msg(sc, msg);
 292         if (msg[0] == MSG_ORDERED_TAG)
 293                 pri_tag = FCPIO_ICMND_PTA_ORDERED;
 294
 295         /* Enqueue the descriptor in the Copy WQ */
 296         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
 297
 298         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 299                 free_wq_copy_descs(fnic, wq);
 300
 301         if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
 302                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 303                 return SCSI_MLQUEUE_HOST_BUSY;
 304         }
 305
 306         flags = 0;
 307         if (sc->sc_data_direction == DMA_FROM_DEVICE)
 308                 flags = FCPIO_ICMND_RDDATA;
 309         else if (sc->sc_data_direction == DMA_TO_DEVICE)
 310                 flags = FCPIO_ICMND_WRDATA;
 311
 312         exch_flags = 0;
 313         if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
 314             (rp->flags & FC_RP_FLAGS_RETRY))
 315                 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
 316
 317         fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
 318                                          0, exch_flags, io_req->sgl_cnt,
 319                                          SCSI_SENSE_BUFFERSIZE,
 320                                          io_req->sgl_list_pa,
 321                                          io_req->sense_buf_pa,
 322                                          0, /* scsi cmd ref, always 0 */
 323                                          pri_tag, /* scsi pri and tag */
 324                                          flags, /* command flags */
 325                                          sc->cmnd, scsi_bufflen(sc),
 326                                          fc_lun.scsi_lun, io_req->port_id,
 327                                          rport->maxframe_size, rp->r_a_tov,
 328                                          rp->e_d_tov);
 329
 330         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 331         return 0;
 332 }
 333
 334 /*
 335  * fnic_queuecommand
 336  * Routine to send a scsi cdb
 337  * Called with host_lock held and interrupts disabled.
 338  */
 339 int fnic_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
 340 {
 341         struct fc_lport *lp;
 342         struct fc_rport *rport;
 343         struct fnic_io_req *io_req;
 344         struct fnic *fnic;
 345         struct vnic_wq_copy *wq;
 346         int ret;
 347         u32 sg_count;
 348         unsigned long flags;
 349         unsigned long ptr;
 350
 351         rport = starget_to_rport(scsi_target(sc->device));
 352         ret = fc_remote_port_chkready(rport);
 353         if (ret) {
 354                 sc->result = ret;
 355                 done(sc);
 356                 return 0;
 357         }
 358
 359         lp = shost_priv(sc->device->host);
 360         if (lp->state != LPORT_ST_READY || !(lp->link_up))
 361                 return SCSI_MLQUEUE_HOST_BUSY;
 362
 363         /*
 364          * Release host lock, use driver resource specific locks from here.
 365          * Don't re-enable interrupts in case they were disabled prior to the
 366          * caller disabling them.
 367          */
 368         spin_unlock(lp->host->host_lock);
 369
 370         /* Get a new io_req for this SCSI IO */
 371         fnic = lport_priv(lp);
 372
 373         io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
 374         if (!io_req) {
 375                 ret = SCSI_MLQUEUE_HOST_BUSY;
 376                 goto out;
 377         }
 378         memset(io_req, 0, sizeof(*io_req));
 379
 380         /* Map the data buffer */
 381         sg_count = scsi_dma_map(sc);
 382         if (sg_count < 0) {
 383                 mempool_free(io_req, fnic->io_req_pool);
 384                 goto out;
 385         }
 386
 387         /* Determine the type of scatter/gather list we need */
 388         io_req->sgl_cnt = sg_count;
 389         io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
 390         if (sg_count > FNIC_DFLT_SG_DESC_CNT)
 391                 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
 392
 393         if (sg_count) {
 394                 io_req->sgl_list =
 395                         mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
 396                                       GFP_ATOMIC | GFP_DMA);
 397                 if (!io_req->sgl_list) {
 398                         ret = SCSI_MLQUEUE_HOST_BUSY;
 399                         scsi_dma_unmap(sc);
 400                         mempool_free(io_req, fnic->io_req_pool);
 401                         goto out;
 402                 }
 403
 404                 /* Cache sgl list allocated address before alignment */
 405                 io_req->sgl_list_alloc = io_req->sgl_list;
 406                 ptr = (unsigned long) io_req->sgl_list;
 407                 if (ptr % FNIC_SG_DESC_ALIGN) {
 408                         io_req->sgl_list = (struct host_sg_desc *)
 409                                 (((unsigned long) ptr
 410                                   + FNIC_SG_DESC_ALIGN - 1)
 411                                  & ~(FNIC_SG_DESC_ALIGN - 1));
 412                 }
 413         }
 414
 415         /* initialize rest of io_req */
 416         io_req->port_id = rport->port_id;
 417         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
 418         CMD_SP(sc) = (char *)io_req;
 419         sc->scsi_done = done;
 420
 421         /* create copy wq desc and enqueue it */
 422         wq = &fnic->wq_copy[0];
 423         ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
 424         if (ret) {
 425                 /*
 426                  * In case another thread cancelled the request,
 427                  * refetch the pointer under the lock.
 428                  */
 429                 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
 430
 431                 spin_lock_irqsave(io_lock, flags);
 432                 io_req = (struct fnic_io_req *)CMD_SP(sc);
 433                 CMD_SP(sc) = NULL;
 434                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 435                 spin_unlock_irqrestore(io_lock, flags);
 436                 if (io_req) {
 437                         fnic_release_ioreq_buf(fnic, io_req, sc);
 438                         mempool_free(io_req, fnic->io_req_pool);
 439                 }
 440         }
 441 out:
 442         /* acquire host lock before returning to SCSI */
 443         spin_lock(lp->host->host_lock);
 444         return ret;
 445 }
 446
 447 /*
 448  * fnic_fcpio_fw_reset_cmpl_handler
 449  * Routine to handle fw reset completion
 450  */
 451 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 452                                             struct fcpio_fw_req *desc)
 453 {
 454         u8 type;
 455         u8 hdr_status;
 456         struct fcpio_tag tag;
 457         int ret = 0;
 458         struct fc_frame *flogi;
 459         unsigned long flags;
 460
 461         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 462
 463         /* Clean up all outstanding io requests */
 464         fnic_cleanup_io(fnic, SCSI_NO_TAG);
 465
 466         spin_lock_irqsave(&fnic->fnic_lock, flags);
 467
 468         flogi = fnic->flogi;
 469         fnic->flogi = NULL;
 470
 471         /* fnic should be in FC_TRANS_ETH_MODE */
 472         if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
 473                 /* Check status of reset completion */
 474                 if (!hdr_status) {
 475                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 476                                       "reset cmpl success\n");
 477                         /* Ready to send flogi out */
 478                         fnic->state = FNIC_IN_ETH_MODE;
 479                 } else {
 480                         FNIC_SCSI_DBG(KERN_DEBUG,
 481                                       fnic->lport->host,
 482                                       "fnic fw_reset : failed %s\n",
 483                                       fnic_fcpio_status_to_str(hdr_status));
 484
 485                         /*
 486                          * Unable to change to eth mode, cannot send out flogi
 487                          * Change state to fc mode, so that subsequent Flogi
 488                          * requests from libFC will cause more attempts to
 489                          * reset the firmware. Free the cached flogi
 490                          */
 491                         fnic->state = FNIC_IN_FC_MODE;
 492                         ret = -1;
 493                 }
 494         } else {
 495                 FNIC_SCSI_DBG(KERN_DEBUG,
 496                               fnic->lport->host,
 497                               "Unexpected state %s while processing"
 498                               " reset cmpl\n", fnic_state_to_str(fnic->state));
 499                 ret = -1;
 500         }
 501
 502         /* Thread removing device blocks till firmware reset is complete */
 503         if (fnic->remove_wait)
 504                 complete(fnic->remove_wait);
 505
 506         /*
 507          * If fnic is being removed, or fw reset failed
 508          * free the flogi frame. Else, send it out
 509          */
 510         if (fnic->remove_wait || ret) {
 511                 fnic->flogi_oxid = FC_XID_UNKNOWN;
 512                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 513                 if (flogi)
 514                         dev_kfree_skb_irq(fp_skb(flogi));
 515                 goto reset_cmpl_handler_end;
 516         }
 517
 518         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 519
 520         if (flogi)
 521                 ret = fnic_send_frame(fnic, flogi);
 522
 523  reset_cmpl_handler_end:
 524         return ret;
 525 }
 526
 527 /*
 528  * fnic_fcpio_flogi_reg_cmpl_handler
 529  * Routine to handle flogi register completion
 530  */
 531 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
 532                                              struct fcpio_fw_req *desc)
 533 {
 534         u8 type;
 535         u8 hdr_status;
 536         struct fcpio_tag tag;
 537         int ret = 0;
 538         struct fc_frame *flogi_resp = NULL;
 539         unsigned long flags;
 540         struct sk_buff *skb;
 541
 542         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 543
 544         /* Update fnic state based on status of flogi reg completion */
 545         spin_lock_irqsave(&fnic->fnic_lock, flags);
 546
 547         flogi_resp = fnic->flogi_resp;
 548         fnic->flogi_resp = NULL;
 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         /* Successful flogi reg cmpl, pass frame to LibFC */
 574         if (!ret && flogi_resp) {
 575                 if (fnic->stop_rx_link_events) {
 576                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 577                         goto reg_cmpl_handler_end;
 578                 }
 579                 skb = (struct sk_buff *)flogi_resp;
 580                 /* Use fr_flags to indicate whether flogi resp or not */
 581                 fr_flags(flogi_resp) = 1;
 582                 fr_dev(flogi_resp) = fnic->lport;
 583                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 584
 585                 skb_queue_tail(&fnic->frame_queue, skb);
 586                 queue_work(fnic_event_queue, &fnic->frame_work);
 587
 588         } else {
 589                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 590                 if (flogi_resp)
 591                         dev_kfree_skb_irq(fp_skb(flogi_resp));
 592         }
 593
 594 reg_cmpl_handler_end:
 595         return ret;
 596 }
 597
 598 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
 599                                         u16 request_out)
 600 {
 601         if (wq->to_clean_index <= wq->to_use_index) {
 602                 /* out of range, stale request_out index */
 603                 if (request_out < wq->to_clean_index ||
 604                     request_out >= wq->to_use_index)
 605                         return 0;
 606         } else {
 607                 /* out of range, stale request_out index */
 608                 if (request_out < wq->to_clean_index &&
 609                     request_out >= wq->to_use_index)
 610                         return 0;
 611         }
 612         /* request_out index is in range */
 613         return 1;
 614 }
 615
 616
 617 /*
 618  * Mark that ack received and store the Ack index. If there are multiple
 619  * acks received before Tx thread cleans it up, the latest value will be
 620  * used which is correct behavior. This state should be in the copy Wq
 621  * instead of in the fnic
 622  */
 623 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
 624                                           unsigned int cq_index,
 625                                           struct fcpio_fw_req *desc)
 626 {
 627         struct vnic_wq_copy *wq;
 628         u16 request_out = desc->u.ack.request_out;
 629         unsigned long flags;
 630
 631         /* mark the ack state */
 632         wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
 633         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 634
 635         if (is_ack_index_in_range(wq, request_out)) {
 636                 fnic->fw_ack_index[0] = request_out;
 637                 fnic->fw_ack_recd[0] = 1;
 638         }
 639         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 640 }
 641
 642 /*
 643  * fnic_fcpio_icmnd_cmpl_handler
 644  * Routine to handle icmnd completions
 645  */
 646 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
 647                                          struct fcpio_fw_req *desc)
 648 {
 649         u8 type;
 650         u8 hdr_status;
 651         struct fcpio_tag tag;
 652         u32 id;
 653         u64 xfer_len = 0;
 654         struct fcpio_icmnd_cmpl *icmnd_cmpl;
 655         struct fnic_io_req *io_req;
 656         struct scsi_cmnd *sc;
 657         unsigned long flags;
 658         spinlock_t *io_lock;
 659
 660         /* Decode the cmpl description to get the io_req id */
 661         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 662         fcpio_tag_id_dec(&tag, &id);
 663
 664         if (id >= FNIC_MAX_IO_REQ)
 665                 return;
 666
 667         sc = scsi_host_find_tag(fnic->lport->host, id);
 668         WARN_ON_ONCE(!sc);
 669         if (!sc)
 670                 return;
 671
 672         io_lock = fnic_io_lock_hash(fnic, sc);
 673         spin_lock_irqsave(io_lock, flags);
 674         io_req = (struct fnic_io_req *)CMD_SP(sc);
 675         WARN_ON_ONCE(!io_req);
 676         if (!io_req) {
 677                 spin_unlock_irqrestore(io_lock, flags);
 678                 return;
 679         }
 680
 681         /* firmware completed the io */
 682         io_req->io_completed = 1;
 683
 684         /*
 685          *  if SCSI-ML has already issued abort on this command,
 686          * ignore completion of the IO. The abts path will clean it up
 687          */
 688         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
 689                 spin_unlock_irqrestore(io_lock, flags);
 690                 return;
 691         }
 692
 693         /* Mark the IO as complete */
 694         CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 695
 696         icmnd_cmpl = &desc->u.icmnd_cmpl;
 697
 698         switch (hdr_status) {
 699         case FCPIO_SUCCESS:
 700                 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
 701                 xfer_len = scsi_bufflen(sc);
 702                 scsi_set_resid(sc, icmnd_cmpl->residual);
 703
 704                 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
 705                         xfer_len -= icmnd_cmpl->residual;
 706
 707                 /*
 708                  * If queue_full, then try to reduce queue depth for all
 709                  * LUNS on the target. Todo: this should be accompanied
 710                  * by a periodic queue_depth rampup based on successful
 711                  * IO completion.
 712                  */
 713                 if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
 714                         struct scsi_device *t_sdev;
 715                         int qd = 0;
 716
 717                         shost_for_each_device(t_sdev, sc->device->host) {
 718                                 if (t_sdev->id != sc->device->id)
 719                                         continue;
 720
 721                                 if (t_sdev->queue_depth > 1) {
 722                                         qd = scsi_track_queue_full
 723                                                 (t_sdev,
 724                                                  t_sdev->queue_depth - 1);
 725                                         if (qd == -1)
 726                                                 qd = t_sdev->host->cmd_per_lun;
 727                                         shost_printk(KERN_INFO,
 728                                                      fnic->lport->host,
 729                                                      "scsi[%d:%d:%d:%d"
 730                                                      "] queue full detected,"
 731                                                      "new depth = %d\n",
 732                                                      t_sdev->host->host_no,
 733                                                      t_sdev->channel,
 734                                                      t_sdev->id, t_sdev->lun,
 735                                                      t_sdev->queue_depth);
 736                                 }
 737                         }
 738                 }
 739                 break;
 740
 741         case FCPIO_TIMEOUT:          /* request was timed out */
 742                 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
 743                 break;
 744
 745         case FCPIO_ABORTED:          /* request was aborted */
 746                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 747                 break;
 748
 749         case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
 750                 scsi_set_resid(sc, icmnd_cmpl->residual);
 751                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 752                 break;
 753
 754         case FCPIO_OUT_OF_RESOURCE:  /* out of resources to complete request */
 755                 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
 756                 break;
 757         case FCPIO_INVALID_HEADER:   /* header contains invalid data */
 758         case FCPIO_INVALID_PARAM:    /* some parameter in request invalid */
 759         case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
 760         case FCPIO_IO_NOT_FOUND:     /* requested I/O was not found */
 761         case FCPIO_SGL_INVALID:      /* request was aborted due to sgl error */
 762         case FCPIO_MSS_INVALID:      /* request was aborted due to mss error */
 763         case FCPIO_FW_ERR:           /* request was terminated due fw error */
 764         default:
 765                 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
 766                              fnic_fcpio_status_to_str(hdr_status));
 767                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 768                 break;
 769         }
 770
 771         /* Break link with the SCSI command */
 772         CMD_SP(sc) = NULL;
 773
 774         spin_unlock_irqrestore(io_lock, flags);
 775
 776         fnic_release_ioreq_buf(fnic, io_req, sc);
 777
 778         mempool_free(io_req, fnic->io_req_pool);
 779
 780         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
 781                 fnic->lport->host_stats.fcp_input_requests++;
 782                 fnic->fcp_input_bytes += xfer_len;
 783         } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
 784                 fnic->lport->host_stats.fcp_output_requests++;
 785                 fnic->fcp_output_bytes += xfer_len;
 786         } else
 787                 fnic->lport->host_stats.fcp_control_requests++;
 788
 789         /* Call SCSI completion function to complete the IO */
 790         if (sc->scsi_done)
 791                 sc->scsi_done(sc);
 792
 793 }
 794
 795 /* fnic_fcpio_itmf_cmpl_handler
 796  * Routine to handle itmf completions
 797  */
 798 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
 799                                         struct fcpio_fw_req *desc)
 800 {
 801         u8 type;
 802         u8 hdr_status;
 803         struct fcpio_tag tag;
 804         u32 id;
 805         struct scsi_cmnd *sc;
 806         struct fnic_io_req *io_req;
 807         unsigned long flags;
 808         spinlock_t *io_lock;
 809
 810         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 811         fcpio_tag_id_dec(&tag, &id);
 812
 813         if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
 814                 return;
 815
 816         sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
 817         WARN_ON_ONCE(!sc);
 818         if (!sc)
 819                 return;
 820
 821         io_lock = fnic_io_lock_hash(fnic, sc);
 822         spin_lock_irqsave(io_lock, flags);
 823         io_req = (struct fnic_io_req *)CMD_SP(sc);
 824         WARN_ON_ONCE(!io_req);
 825         if (!io_req) {
 826                 spin_unlock_irqrestore(io_lock, flags);
 827                 return;
 828         }
 829
 830         if (id & FNIC_TAG_ABORT) {
 831                 /* Completion of abort cmd */
 832                 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
 833                         /* This is a late completion. Ignore it */
 834                         spin_unlock_irqrestore(io_lock, flags);
 835                         return;
 836                 }
 837                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
 838                 CMD_ABTS_STATUS(sc) = hdr_status;
 839
 840                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 841                               "abts cmpl recd. id %d status %s\n",
 842                               (int)(id & FNIC_TAG_MASK),
 843                               fnic_fcpio_status_to_str(hdr_status));
 844
 845                 /*
 846                  * If scsi_eh thread is blocked waiting for abts to complete,
 847                  * signal completion to it. IO will be cleaned in the thread
 848                  * else clean it in this context
 849                  */
 850                 if (io_req->abts_done) {
 851                         complete(io_req->abts_done);
 852                         spin_unlock_irqrestore(io_lock, flags);
 853                 } else {
 854                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 855                                       "abts cmpl, completing IO\n");
 856                         CMD_SP(sc) = NULL;
 857                         sc->result = (DID_ERROR << 16);
 858
 859                         spin_unlock_irqrestore(io_lock, flags);
 860
 861                         fnic_release_ioreq_buf(fnic, io_req, sc);
 862                         mempool_free(io_req, fnic->io_req_pool);
 863                         if (sc->scsi_done)
 864                                 sc->scsi_done(sc);
 865                 }
 866
 867         } else if (id & FNIC_TAG_DEV_RST) {
 868                 /* Completion of device reset */
 869                 CMD_LR_STATUS(sc) = hdr_status;
 870                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 871                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 872                               "dev reset cmpl recd. id %d status %s\n",
 873                               (int)(id & FNIC_TAG_MASK),
 874                               fnic_fcpio_status_to_str(hdr_status));
 875                 if (io_req->dr_done)
 876                         complete(io_req->dr_done);
 877                 spin_unlock_irqrestore(io_lock, flags);
 878
 879         } else {
 880                 shost_printk(KERN_ERR, fnic->lport->host,
 881                              "Unexpected itmf io state %s tag %x\n",
 882                              fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
 883                 spin_unlock_irqrestore(io_lock, flags);
 884         }
 885
 886 }
 887
 888 /*
 889  * fnic_fcpio_cmpl_handler
 890  * Routine to service the cq for wq_copy
 891  */
 892 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
 893                                    unsigned int cq_index,
 894                                    struct fcpio_fw_req *desc)
 895 {
 896         struct fnic *fnic = vnic_dev_priv(vdev);
 897         int ret = 0;
 898
 899         switch (desc->hdr.type) {
 900         case FCPIO_ACK: /* fw copied copy wq desc to its queue */
 901                 fnic_fcpio_ack_handler(fnic, cq_index, desc);
 902                 break;
 903
 904         case FCPIO_ICMND_CMPL: /* fw completed a command */
 905                 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
 906                 break;
 907
 908         case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
 909                 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
 910                 break;
 911
 912         case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
 913                 ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
 914                 break;
 915
 916         case FCPIO_RESET_CMPL: /* fw completed reset */
 917                 ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
 918                 break;
 919
 920         default:
 921                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 922                               "firmware completion type %d\n",
 923                               desc->hdr.type);
 924                 break;
 925         }
 926
 927         return ret;
 928 }
 929
 930 /*
 931  * fnic_wq_copy_cmpl_handler
 932  * Routine to process wq copy
 933  */
 934 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
 935 {
 936         unsigned int wq_work_done = 0;
 937         unsigned int i, cq_index;
 938         unsigned int cur_work_done;
 939
 940         for (i = 0; i < fnic->wq_copy_count; i++) {
 941                 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
 942                 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
 943                                                      fnic_fcpio_cmpl_handler,
 944                                                      copy_work_to_do);
 945                 wq_work_done += cur_work_done;
 946         }
 947         return wq_work_done;
 948 }
 949
 950 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
 951 {
 952         unsigned int i;
 953         struct fnic_io_req *io_req;
 954         unsigned long flags = 0;
 955         struct scsi_cmnd *sc;
 956         spinlock_t *io_lock;
 957
 958         for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
 959                 if (i == exclude_id)
 960                         continue;
 961
 962                 sc = scsi_host_find_tag(fnic->lport->host, i);
 963                 if (!sc)
 964                         continue;
 965
 966                 io_lock = fnic_io_lock_hash(fnic, sc);
 967                 spin_lock_irqsave(io_lock, flags);
 968                 io_req = (struct fnic_io_req *)CMD_SP(sc);
 969                 if (!io_req) {
 970                         spin_unlock_irqrestore(io_lock, flags);
 971                         goto cleanup_scsi_cmd;
 972                 }
 973
 974                 CMD_SP(sc) = NULL;
 975
 976                 spin_unlock_irqrestore(io_lock, flags);
 977
 978                 /*
 979                  * If there is a scsi_cmnd associated with this io_req, then
 980                  * free the corresponding state
 981                  */
 982                 fnic_release_ioreq_buf(fnic, io_req, sc);
 983                 mempool_free(io_req, fnic->io_req_pool);
 984
 985 cleanup_scsi_cmd:
 986                 sc->result = DID_TRANSPORT_DISRUPTED << 16;
 987                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
 988                               " DID_TRANSPORT_DISRUPTED\n");
 989
 990                 /* Complete the command to SCSI */
 991                 if (sc->scsi_done)
 992                         sc->scsi_done(sc);
 993         }
 994 }
 995
 996 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
 997                                   struct fcpio_host_req *desc)
 998 {
 999         u32 id;
1000         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1001         struct fnic_io_req *io_req;
1002         struct scsi_cmnd *sc;
1003         unsigned long flags;
1004         spinlock_t *io_lock;
1005
1006         /* get the tag reference */
1007         fcpio_tag_id_dec(&desc->hdr.tag, &id);
1008         id &= FNIC_TAG_MASK;
1009
1010         if (id >= FNIC_MAX_IO_REQ)
1011                 return;
1012
1013         sc = scsi_host_find_tag(fnic->lport->host, id);
1014         if (!sc)
1015                 return;
1016
1017         io_lock = fnic_io_lock_hash(fnic, sc);
1018         spin_lock_irqsave(io_lock, flags);
1019
1020         /* Get the IO context which this desc refers to */
1021         io_req = (struct fnic_io_req *)CMD_SP(sc);
1022
1023         /* fnic interrupts are turned off by now */
1024
1025         if (!io_req) {
1026                 spin_unlock_irqrestore(io_lock, flags);
1027                 goto wq_copy_cleanup_scsi_cmd;
1028         }
1029
1030         CMD_SP(sc) = NULL;
1031
1032         spin_unlock_irqrestore(io_lock, flags);
1033
1034         fnic_release_ioreq_buf(fnic, io_req, sc);
1035         mempool_free(io_req, fnic->io_req_pool);
1036
1037 wq_copy_cleanup_scsi_cmd:
1038         sc->result = DID_NO_CONNECT << 16;
1039         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1040                       " DID_NO_CONNECT\n");
1041
1042         if (sc->scsi_done)
1043                 sc->scsi_done(sc);
1044 }
1045
1046 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1047                                           u32 task_req, u8 *fc_lun,
1048                                           struct fnic_io_req *io_req)
1049 {
1050         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1051         unsigned long flags;
1052
1053         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1054
1055         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1056                 free_wq_copy_descs(fnic, wq);
1057
1058         if (!vnic_wq_copy_desc_avail(wq)) {
1059                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1060                 return 1;
1061         }
1062         fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1063                                      0, task_req, tag, fc_lun, io_req->port_id,
1064                                      fnic->config.ra_tov, fnic->config.ed_tov);
1065
1066         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1067         return 0;
1068 }
1069
1070 void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1071 {
1072         int tag;
1073         struct fnic_io_req *io_req;
1074         spinlock_t *io_lock;
1075         unsigned long flags;
1076         struct scsi_cmnd *sc;
1077         struct scsi_lun fc_lun;
1078         enum fnic_ioreq_state old_ioreq_state;
1079
1080         FNIC_SCSI_DBG(KERN_DEBUG,
1081                       fnic->lport->host,
1082                       "fnic_rport_reset_exch called portid 0x%06x\n",
1083                       port_id);
1084
1085         if (fnic->in_remove)
1086                 return;
1087
1088         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1089                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1090                 if (!sc)
1091                         continue;
1092
1093                 io_lock = fnic_io_lock_hash(fnic, sc);
1094                 spin_lock_irqsave(io_lock, flags);
1095
1096                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1097
1098                 if (!io_req || io_req->port_id != port_id) {
1099                         spin_unlock_irqrestore(io_lock, flags);
1100                         continue;
1101                 }
1102
1103                 /*
1104                  * Found IO that is still pending with firmware and
1105                  * belongs to rport that went away
1106                  */
1107                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1108                         spin_unlock_irqrestore(io_lock, flags);
1109                         continue;
1110                 }
1111                 old_ioreq_state = CMD_STATE(sc);
1112                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1113                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1114
1115                 BUG_ON(io_req->abts_done);
1116
1117                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1118                               "fnic_rport_reset_exch: Issuing abts\n");
1119
1120                 spin_unlock_irqrestore(io_lock, flags);
1121
1122                 /* Now queue the abort command to firmware */
1123                 int_to_scsilun(sc->device->lun, &fc_lun);
1124
1125                 if (fnic_queue_abort_io_req(fnic, tag,
1126                                             FCPIO_ITMF_ABT_TASK_TERM,
1127                                             fc_lun.scsi_lun, io_req)) {
1128                         /*
1129                          * Revert the cmd state back to old state, if
1130                          * it hasnt changed in between. This cmd will get
1131                          * aborted later by scsi_eh, or cleaned up during
1132                          * lun reset
1133                          */
1134                         io_lock = fnic_io_lock_hash(fnic, sc);
1135
1136                         spin_lock_irqsave(io_lock, flags);
1137                         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1138                                 CMD_STATE(sc) = old_ioreq_state;
1139                         spin_unlock_irqrestore(io_lock, flags);
1140                 }
1141         }
1142
1143 }
1144
1145 void fnic_terminate_rport_io(struct fc_rport *rport)
1146 {
1147         int tag;
1148         struct fnic_io_req *io_req;
1149         spinlock_t *io_lock;
1150         unsigned long flags;
1151         struct scsi_cmnd *sc;
1152         struct scsi_lun fc_lun;
1153         struct fc_rport_libfc_priv *rdata = rport->dd_data;
1154         struct fc_lport *lport = rdata->local_port;
1155         struct fnic *fnic = lport_priv(lport);
1156         struct fc_rport *cmd_rport;
1157         enum fnic_ioreq_state old_ioreq_state;
1158
1159         FNIC_SCSI_DBG(KERN_DEBUG,
1160                       fnic->lport->host, "fnic_terminate_rport_io called"
1161                       " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
1162                       rport->port_name, rport->node_name,
1163                       rport->port_id);
1164
1165         if (fnic->in_remove)
1166                 return;
1167
1168         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1169                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1170                 if (!sc)
1171                         continue;
1172
1173                 cmd_rport = starget_to_rport(scsi_target(sc->device));
1174                 if (rport != cmd_rport)
1175                         continue;
1176
1177                 io_lock = fnic_io_lock_hash(fnic, sc);
1178                 spin_lock_irqsave(io_lock, flags);
1179
1180                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1181
1182                 if (!io_req || rport != cmd_rport) {
1183                         spin_unlock_irqrestore(io_lock, flags);
1184                         continue;
1185                 }
1186
1187                 /*
1188                  * Found IO that is still pending with firmware and
1189                  * belongs to rport that went away
1190                  */
1191                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1192                         spin_unlock_irqrestore(io_lock, flags);
1193                         continue;
1194                 }
1195                 old_ioreq_state = CMD_STATE(sc);
1196                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1197                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1198
1199                 BUG_ON(io_req->abts_done);
1200
1201                 FNIC_SCSI_DBG(KERN_DEBUG,
1202                               fnic->lport->host,
1203                               "fnic_terminate_rport_io: Issuing abts\n");
1204
1205                 spin_unlock_irqrestore(io_lock, flags);
1206
1207                 /* Now queue the abort command to firmware */
1208                 int_to_scsilun(sc->device->lun, &fc_lun);
1209
1210                 if (fnic_queue_abort_io_req(fnic, tag,
1211                                             FCPIO_ITMF_ABT_TASK_TERM,
1212                                             fc_lun.scsi_lun, io_req)) {
1213                         /*
1214                          * Revert the cmd state back to old state, if
1215                          * it hasnt changed in between. This cmd will get
1216                          * aborted later by scsi_eh, or cleaned up during
1217                          * lun reset
1218                          */
1219                         io_lock = fnic_io_lock_hash(fnic, sc);
1220
1221                         spin_lock_irqsave(io_lock, flags);
1222                         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1223                                 CMD_STATE(sc) = old_ioreq_state;
1224                         spin_unlock_irqrestore(io_lock, flags);
1225                 }
1226         }
1227
1228 }
1229
1230 static void fnic_block_error_handler(struct scsi_cmnd *sc)
1231 {
1232         struct Scsi_Host *shost = sc->device->host;
1233         struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
1234         unsigned long flags;
1235
1236         spin_lock_irqsave(shost->host_lock, flags);
1237         while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1238                 spin_unlock_irqrestore(shost->host_lock, flags);
1239                 msleep(1000);
1240                 spin_lock_irqsave(shost->host_lock, flags);
1241         }
1242         spin_unlock_irqrestore(shost->host_lock, flags);
1243
1244 }
1245
1246 /*
1247  * This function is exported to SCSI for sending abort cmnds.
1248  * A SCSI IO is represented by a io_req in the driver.
1249  * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1250  */
1251 int fnic_abort_cmd(struct scsi_cmnd *sc)
1252 {
1253         struct fc_lport *lp;
1254         struct fnic *fnic;
1255         struct fnic_io_req *io_req;
1256         struct fc_rport *rport;
1257         spinlock_t *io_lock;
1258         unsigned long flags;
1259         int ret = SUCCESS;
1260         u32 task_req;
1261         struct scsi_lun fc_lun;
1262         DECLARE_COMPLETION_ONSTACK(tm_done);
1263
1264         /* Wait for rport to unblock */
1265         fnic_block_error_handler(sc);
1266
1267         /* Get local-port, check ready and link up */
1268         lp = shost_priv(sc->device->host);
1269
1270         fnic = lport_priv(lp);
1271         FNIC_SCSI_DBG(KERN_DEBUG,
1272                       fnic->lport->host,
1273                       "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
1274                       (starget_to_rport(scsi_target(sc->device)))->port_id,
1275                       sc->device->lun, sc->request->tag);
1276
1277         if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1278                 ret = FAILED;
1279                 goto fnic_abort_cmd_end;
1280         }
1281
1282         /*
1283          * Avoid a race between SCSI issuing the abort and the device
1284          * completing the command.
1285          *
1286          * If the command is already completed by the fw cmpl code,
1287          * we just return SUCCESS from here. This means that the abort
1288          * succeeded. In the SCSI ML, since the timeout for command has
1289          * happened, the completion wont actually complete the command
1290          * and it will be considered as an aborted command
1291          *
1292          * The CMD_SP will not be cleared except while holding io_req_lock.
1293          */
1294         io_lock = fnic_io_lock_hash(fnic, sc);
1295         spin_lock_irqsave(io_lock, flags);
1296         io_req = (struct fnic_io_req *)CMD_SP(sc);
1297         if (!io_req) {
1298                 spin_unlock_irqrestore(io_lock, flags);
1299                 goto fnic_abort_cmd_end;
1300         }
1301
1302         io_req->abts_done = &tm_done;
1303
1304         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1305                 spin_unlock_irqrestore(io_lock, flags);
1306                 goto wait_pending;
1307         }
1308         /*
1309          * Command is still pending, need to abort it
1310          * If the firmware completes the command after this point,
1311          * the completion wont be done till mid-layer, since abort
1312          * has already started.
1313          */
1314         CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1315         CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1316
1317         spin_unlock_irqrestore(io_lock, flags);
1318
1319         /*
1320          * Check readiness of the remote port. If the path to remote
1321          * port is up, then send abts to the remote port to terminate
1322          * the IO. Else, just locally terminate the IO in the firmware
1323          */
1324         rport = starget_to_rport(scsi_target(sc->device));
1325         if (fc_remote_port_chkready(rport) == 0)
1326                 task_req = FCPIO_ITMF_ABT_TASK;
1327         else
1328                 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1329
1330         /* Now queue the abort command to firmware */
1331         int_to_scsilun(sc->device->lun, &fc_lun);
1332
1333         if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1334                                     fc_lun.scsi_lun, io_req)) {
1335                 spin_lock_irqsave(io_lock, flags);
1336                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1337                 if (io_req)
1338                         io_req->abts_done = NULL;
1339                 spin_unlock_irqrestore(io_lock, flags);
1340                 ret = FAILED;
1341                 goto fnic_abort_cmd_end;
1342         }
1343
1344         /*
1345          * We queued an abort IO, wait for its completion.
1346          * Once the firmware completes the abort command, it will
1347          * wake up this thread.
1348          */
1349  wait_pending:
1350         wait_for_completion_timeout(&tm_done,
1351                                     msecs_to_jiffies
1352                                     (2 * fnic->config.ra_tov +
1353                                      fnic->config.ed_tov));
1354
1355         /* Check the abort status */
1356         spin_lock_irqsave(io_lock, flags);
1357
1358         io_req = (struct fnic_io_req *)CMD_SP(sc);
1359         if (!io_req) {
1360                 spin_unlock_irqrestore(io_lock, flags);
1361                 ret = FAILED;
1362                 goto fnic_abort_cmd_end;
1363         }
1364         io_req->abts_done = NULL;
1365
1366         /* fw did not complete abort, timed out */
1367         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1368                 spin_unlock_irqrestore(io_lock, flags);
1369                 ret = FAILED;
1370                 goto fnic_abort_cmd_end;
1371         }
1372
1373         /*
1374          * firmware completed the abort, check the status,
1375          * free the io_req irrespective of failure or success
1376          */
1377         if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1378                 ret = FAILED;
1379
1380         CMD_SP(sc) = NULL;
1381
1382         spin_unlock_irqrestore(io_lock, flags);
1383
1384         fnic_release_ioreq_buf(fnic, io_req, sc);
1385         mempool_free(io_req, fnic->io_req_pool);
1386
1387 fnic_abort_cmd_end:
1388         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1389                       "Returning from abort cmd %s\n",
1390                       (ret == SUCCESS) ?
1391                       "SUCCESS" : "FAILED");
1392         return ret;
1393 }
1394
1395 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1396                                        struct scsi_cmnd *sc,
1397                                        struct fnic_io_req *io_req)
1398 {
1399         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1400         struct scsi_lun fc_lun;
1401         int ret = 0;
1402         unsigned long intr_flags;
1403
1404         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1405
1406         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1407                 free_wq_copy_descs(fnic, wq);
1408
1409         if (!vnic_wq_copy_desc_avail(wq)) {
1410                 ret = -EAGAIN;
1411                 goto lr_io_req_end;
1412         }
1413
1414         /* fill in the lun info */
1415         int_to_scsilun(sc->device->lun, &fc_lun);
1416
1417         fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1418                                      0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1419                                      fc_lun.scsi_lun, io_req->port_id,
1420                                      fnic->config.ra_tov, fnic->config.ed_tov);
1421
1422 lr_io_req_end:
1423         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1424
1425         return ret;
1426 }
1427
1428 /*
1429  * Clean up any pending aborts on the lun
1430  * For each outstanding IO on this lun, whose abort is not completed by fw,
1431  * issue a local abort. Wait for abort to complete. Return 0 if all commands
1432  * successfully aborted, 1 otherwise
1433  */
1434 static int fnic_clean_pending_aborts(struct fnic *fnic,
1435                                      struct scsi_cmnd *lr_sc)
1436 {
1437         int tag;
1438         struct fnic_io_req *io_req;
1439         spinlock_t *io_lock;
1440         unsigned long flags;
1441         int ret = 0;
1442         struct scsi_cmnd *sc;
1443         struct fc_rport *rport;
1444         struct scsi_lun fc_lun;
1445         struct scsi_device *lun_dev = lr_sc->device;
1446         DECLARE_COMPLETION_ONSTACK(tm_done);
1447
1448         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1449                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1450                 /*
1451                  * ignore this lun reset cmd or cmds that do not belong to
1452                  * this lun
1453                  */
1454                 if (!sc || sc == lr_sc || sc->device != lun_dev)
1455                         continue;
1456
1457                 io_lock = fnic_io_lock_hash(fnic, sc);
1458                 spin_lock_irqsave(io_lock, flags);
1459
1460                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1461
1462                 if (!io_req || sc->device != lun_dev) {
1463                         spin_unlock_irqrestore(io_lock, flags);
1464                         continue;
1465                 }
1466
1467                 /*
1468                  * Found IO that is still pending with firmware and
1469                  * belongs to the LUN that we are resetting
1470                  */
1471                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1472                               "Found IO in %s on lun\n",
1473                               fnic_ioreq_state_to_str(CMD_STATE(sc)));
1474
1475                 BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING);
1476
1477                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1478                 io_req->abts_done = &tm_done;
1479                 spin_unlock_irqrestore(io_lock, flags);
1480
1481                 /* Now queue the abort command to firmware */
1482                 int_to_scsilun(sc->device->lun, &fc_lun);
1483                 rport = starget_to_rport(scsi_target(sc->device));
1484
1485                 if (fnic_queue_abort_io_req(fnic, tag,
1486                                             FCPIO_ITMF_ABT_TASK_TERM,
1487                                             fc_lun.scsi_lun, io_req)) {
1488                         spin_lock_irqsave(io_lock, flags);
1489                         io_req = (struct fnic_io_req *)CMD_SP(sc);
1490                         if (io_req)
1491                                 io_req->abts_done = NULL;
1492                         spin_unlock_irqrestore(io_lock, flags);
1493                         ret = 1;
1494                         goto clean_pending_aborts_end;
1495                 }
1496
1497                 wait_for_completion_timeout(&tm_done,
1498                                             msecs_to_jiffies
1499                                             (fnic->config.ed_tov));
1500
1501                 /* Recheck cmd state to check if it is now aborted */
1502                 spin_lock_irqsave(io_lock, flags);
1503                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1504                 if (!io_req) {
1505                         spin_unlock_irqrestore(io_lock, flags);
1506                         ret = 1;
1507                         goto clean_pending_aborts_end;
1508                 }
1509
1510                 io_req->abts_done = NULL;
1511
1512                 /* if abort is still pending with fw, fail */
1513                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1514                         spin_unlock_irqrestore(io_lock, flags);
1515                         ret = 1;
1516                         goto clean_pending_aborts_end;
1517                 }
1518                 CMD_SP(sc) = NULL;
1519                 spin_unlock_irqrestore(io_lock, flags);
1520
1521                 fnic_release_ioreq_buf(fnic, io_req, sc);
1522                 mempool_free(io_req, fnic->io_req_pool);
1523         }
1524
1525 clean_pending_aborts_end:
1526         return ret;
1527 }
1528
1529 /*
1530  * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
1531  * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
1532  * on the LUN.
1533  */
1534 int fnic_device_reset(struct scsi_cmnd *sc)
1535 {
1536         struct fc_lport *lp;
1537         struct fnic *fnic;
1538         struct fnic_io_req *io_req;
1539         struct fc_rport *rport;
1540         int status;
1541         int ret = FAILED;
1542         spinlock_t *io_lock;
1543         unsigned long flags;
1544         DECLARE_COMPLETION_ONSTACK(tm_done);
1545
1546         /* Wait for rport to unblock */
1547         fnic_block_error_handler(sc);
1548
1549         /* Get local-port, check ready and link up */
1550         lp = shost_priv(sc->device->host);
1551
1552         fnic = lport_priv(lp);
1553         FNIC_SCSI_DBG(KERN_DEBUG,
1554                       fnic->lport->host,
1555                       "Device reset called FCID 0x%x, LUN 0x%x\n",
1556                       (starget_to_rport(scsi_target(sc->device)))->port_id,
1557                       sc->device->lun);
1558
1559
1560         if (lp->state != LPORT_ST_READY || !(lp->link_up))
1561                 goto fnic_device_reset_end;
1562
1563         /* Check if remote port up */
1564         rport = starget_to_rport(scsi_target(sc->device));
1565         if (fc_remote_port_chkready(rport))
1566                 goto fnic_device_reset_end;
1567
1568         io_lock = fnic_io_lock_hash(fnic, sc);
1569         spin_lock_irqsave(io_lock, flags);
1570         io_req = (struct fnic_io_req *)CMD_SP(sc);
1571
1572         /*
1573          * If there is a io_req attached to this command, then use it,
1574          * else allocate a new one.
1575          */
1576         if (!io_req) {
1577                 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
1578                 if (!io_req) {
1579                         spin_unlock_irqrestore(io_lock, flags);
1580                         goto fnic_device_reset_end;
1581                 }
1582                 memset(io_req, 0, sizeof(*io_req));
1583                 io_req->port_id = rport->port_id;
1584                 CMD_SP(sc) = (char *)io_req;
1585         }
1586         io_req->dr_done = &tm_done;
1587         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
1588         CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
1589         spin_unlock_irqrestore(io_lock, flags);
1590
1591         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n",
1592                       sc->request->tag);
1593
1594         /*
1595          * issue the device reset, if enqueue failed, clean up the ioreq
1596          * and break assoc with scsi cmd
1597          */
1598         if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
1599                 spin_lock_irqsave(io_lock, flags);
1600                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1601                 if (io_req)
1602                         io_req->dr_done = NULL;
1603                 goto fnic_device_reset_clean;
1604         }
1605
1606         /*
1607          * Wait on the local completion for LUN reset.  The io_req may be
1608          * freed while we wait since we hold no lock.
1609          */
1610         wait_for_completion_timeout(&tm_done,
1611                                     msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
1612
1613         spin_lock_irqsave(io_lock, flags);
1614         io_req = (struct fnic_io_req *)CMD_SP(sc);
1615         if (!io_req) {
1616                 spin_unlock_irqrestore(io_lock, flags);
1617                 goto fnic_device_reset_end;
1618         }
1619         io_req->dr_done = NULL;
1620
1621         status = CMD_LR_STATUS(sc);
1622         spin_unlock_irqrestore(io_lock, flags);
1623
1624         /*
1625          * If lun reset not completed, bail out with failed. io_req
1626          * gets cleaned up during higher levels of EH
1627          */
1628         if (status == FCPIO_INVALID_CODE) {
1629                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1630                               "Device reset timed out\n");
1631                 goto fnic_device_reset_end;
1632         }
1633
1634         /* Completed, but not successful, clean up the io_req, return fail */
1635         if (status != FCPIO_SUCCESS) {
1636                 spin_lock_irqsave(io_lock, flags);
1637                 FNIC_SCSI_DBG(KERN_DEBUG,
1638                               fnic->lport->host,
1639                               "Device reset completed - failed\n");
1640                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1641                 goto fnic_device_reset_clean;
1642         }
1643
1644         /*
1645          * Clean up any aborts on this lun that have still not
1646          * completed. If any of these fail, then LUN reset fails.
1647          * clean_pending_aborts cleans all cmds on this lun except
1648          * the lun reset cmd. If all cmds get cleaned, the lun reset
1649          * succeeds
1650          */
1651         if (fnic_clean_pending_aborts(fnic, sc)) {
1652                 spin_lock_irqsave(io_lock, flags);
1653                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1654                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1655                               "Device reset failed"
1656                               " since could not abort all IOs\n");
1657                 goto fnic_device_reset_clean;
1658         }
1659
1660         /* Clean lun reset command */
1661         spin_lock_irqsave(io_lock, flags);
1662         io_req = (struct fnic_io_req *)CMD_SP(sc);
1663         if (io_req)
1664                 /* Completed, and successful */
1665                 ret = SUCCESS;
1666
1667 fnic_device_reset_clean:
1668         if (io_req)
1669                 CMD_SP(sc) = NULL;
1670
1671         spin_unlock_irqrestore(io_lock, flags);
1672
1673         if (io_req) {
1674                 fnic_release_ioreq_buf(fnic, io_req, sc);
1675                 mempool_free(io_req, fnic->io_req_pool);
1676         }
1677
1678 fnic_device_reset_end:
1679         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1680                       "Returning from device reset %s\n",
1681                       (ret == SUCCESS) ?
1682                       "SUCCESS" : "FAILED");
1683         return ret;
1684 }
1685
1686 /* Clean up all IOs, clean up libFC local port */
1687 int fnic_reset(struct Scsi_Host *shost)
1688 {
1689         struct fc_lport *lp;
1690         struct fnic *fnic;
1691         int ret = SUCCESS;
1692
1693         lp = shost_priv(shost);
1694         fnic = lport_priv(lp);
1695
1696         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1697                       "fnic_reset called\n");
1698
1699         /*
1700          * Reset local port, this will clean up libFC exchanges,
1701          * reset remote port sessions, and if link is up, begin flogi
1702          */
1703         if (lp->tt.lport_reset(lp))
1704                 ret = FAILED;
1705
1706         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1707                       "Returning from fnic reset %s\n",
1708                       (ret == SUCCESS) ?
1709                       "SUCCESS" : "FAILED");
1710
1711         return ret;
1712 }
1713
1714 /*
1715  * SCSI Error handling calls driver's eh_host_reset if all prior
1716  * error handling levels return FAILED. If host reset completes
1717  * successfully, and if link is up, then Fabric login begins.
1718  *
1719  * Host Reset is the highest level of error recovery. If this fails, then
1720  * host is offlined by SCSI.
1721  *
1722  */
1723 int fnic_host_reset(struct scsi_cmnd *sc)
1724 {
1725         int ret;
1726         unsigned long wait_host_tmo;
1727         struct Scsi_Host *shost = sc->device->host;
1728         struct fc_lport *lp = shost_priv(shost);
1729
1730         /*
1731          * If fnic_reset is successful, wait for fabric login to complete
1732          * scsi-ml tries to send a TUR to every device if host reset is
1733          * successful, so before returning to scsi, fabric should be up
1734          */
1735         ret = fnic_reset(shost);
1736         if (ret == SUCCESS) {
1737                 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
1738                 ret = FAILED;
1739                 while (time_before(jiffies, wait_host_tmo)) {
1740                         if ((lp->state == LPORT_ST_READY) &&
1741                             (lp->link_up)) {
1742                                 ret = SUCCESS;
1743                                 break;
1744                         }
1745                         ssleep(1);
1746                 }
1747         }
1748
1749         return ret;
1750 }
1751
1752 /*
1753  * This fxn is called from libFC when host is removed
1754  */
1755 void fnic_scsi_abort_io(struct fc_lport *lp)
1756 {
1757         int err = 0;
1758         unsigned long flags;
1759         enum fnic_state old_state;
1760         struct fnic *fnic = lport_priv(lp);
1761         DECLARE_COMPLETION_ONSTACK(remove_wait);
1762
1763         /* Issue firmware reset for fnic, wait for reset to complete */
1764         spin_lock_irqsave(&fnic->fnic_lock, flags);
1765         fnic->remove_wait = &remove_wait;
1766         old_state = fnic->state;
1767         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1768         vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
1769         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1770
1771         err = fnic_fw_reset_handler(fnic);
1772         if (err) {
1773                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1774                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1775                         fnic->state = old_state;
1776                 fnic->remove_wait = NULL;
1777                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1778                 return;
1779         }
1780
1781         /* Wait for firmware reset to complete */
1782         wait_for_completion_timeout(&remove_wait,
1783                                     msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
1784
1785         spin_lock_irqsave(&fnic->fnic_lock, flags);
1786         fnic->remove_wait = NULL;
1787         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1788                       "fnic_scsi_abort_io %s\n",
1789                       (fnic->state == FNIC_IN_ETH_MODE) ?
1790                       "SUCCESS" : "FAILED");
1791         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1792
1793 }
1794
1795 /*
1796  * This fxn called from libFC to clean up driver IO state on link down
1797  */
1798 void fnic_scsi_cleanup(struct fc_lport *lp)
1799 {
1800         unsigned long flags;
1801         enum fnic_state old_state;
1802         struct fnic *fnic = lport_priv(lp);
1803
1804         /* issue fw reset */
1805         spin_lock_irqsave(&fnic->fnic_lock, flags);
1806         old_state = fnic->state;
1807         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1808         vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
1809         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1810
1811         if (fnic_fw_reset_handler(fnic)) {
1812                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1813                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1814                         fnic->state = old_state;
1815                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1816         }
1817
1818 }
1819
1820 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
1821 {
1822 }
1823
1824 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
1825 {
1826         struct fnic *fnic = lport_priv(lp);
1827
1828         /* Non-zero sid, nothing to do */
1829         if (sid)
1830                 goto call_fc_exch_mgr_reset;
1831
1832         if (did) {
1833                 fnic_rport_exch_reset(fnic, did);
1834                 goto call_fc_exch_mgr_reset;
1835         }
1836
1837         /*
1838          * sid = 0, did = 0
1839          * link down or device being removed
1840          */
1841         if (!fnic->in_remove)
1842                 fnic_scsi_cleanup(lp);
1843         else
1844                 fnic_scsi_abort_io(lp);
1845
1846         /* call libFC exch mgr reset to reset its exchanges */
1847 call_fc_exch_mgr_reset:
1848         fc_exch_mgr_reset(lp, sid, did);
1849
1850 }