drivers/scsi/fnic/fnic_scsi.c

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  */
  18 #include <linux/mempool.h>
  19 #include <linux/errno.h>
  20 #include <linux/init.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/pci.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/if_ether.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/delay.h>
  29 #include <linux/gfp.h>
  30 #include <scsi/scsi.h>
  31 #include <scsi/scsi_host.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_cmnd.h>
  34 #include <scsi/scsi_tcq.h>
  35 #include <scsi/fc/fc_els.h>
  36 #include <scsi/fc/fc_fcoe.h>
  37 #include <scsi/libfc.h>
  38 #include <scsi/fc_frame.h>
  39 #include "fnic_io.h"
  40 #include "fnic.h"
  41
  42 const char *fnic_state_str[] = {
  43         [FNIC_IN_FC_MODE] =           "FNIC_IN_FC_MODE",
  44         [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
  45         [FNIC_IN_ETH_MODE] =          "FNIC_IN_ETH_MODE",
  46         [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
  47 };
  48
  49 static const char *fnic_ioreq_state_str[] = {
  50         [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
  51         [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
  52         [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
  53         [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
  54 };
  55
  56 static const char *fcpio_status_str[] =  {
  57         [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
  58         [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
  59         [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
  60         [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
  61         [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
  62         [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
  63         [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
  64         [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
  65         [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
  66         [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
  67         [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
  68         [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
  69         [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
  70         [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
  71         [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
  72         [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
  73         [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
  74         [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
  75         [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
  76 };
  77
  78 const char *fnic_state_to_str(unsigned int state)
  79 {
  80         if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
  81                 return "unknown";
  82
  83         return fnic_state_str[state];
  84 }
  85
  86 static const char *fnic_ioreq_state_to_str(unsigned int state)
  87 {
  88         if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
  89             !fnic_ioreq_state_str[state])
  90                 return "unknown";
  91
  92         return fnic_ioreq_state_str[state];
  93 }
  94
  95 static const char *fnic_fcpio_status_to_str(unsigned int status)
  96 {
  97         if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
  98                 return "unknown";
  99
 100         return fcpio_status_str[status];
 101 }
 102
 103 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
 104
 105 static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
 106                                             struct scsi_cmnd *sc)
 107 {
 108         u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
 109
 110         return &fnic->io_req_lock[hash];
 111 }
 112
 113 /*
 114  * Unmap the data buffer and sense buffer for an io_req,
 115  * also unmap and free the device-private scatter/gather list.
 116  */
 117 static void fnic_release_ioreq_buf(struct fnic *fnic,
 118                                    struct fnic_io_req *io_req,
 119                                    struct scsi_cmnd *sc)
 120 {
 121         if (io_req->sgl_list_pa)
 122                 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
 123                                  sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
 124                                  PCI_DMA_TODEVICE);
 125         scsi_dma_unmap(sc);
 126
 127         if (io_req->sgl_cnt)
 128                 mempool_free(io_req->sgl_list_alloc,
 129                              fnic->io_sgl_pool[io_req->sgl_type]);
 130         if (io_req->sense_buf_pa)
 131                 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
 132                                  SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
 133 }
 134
 135 /* Free up Copy Wq descriptors. Called with copy_wq lock held */
 136 static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
 137 {
 138         /* if no Ack received from firmware, then nothing to clean */
 139         if (!fnic->fw_ack_recd[0])
 140                 return 1;
 141
 142         /*
 143          * Update desc_available count based on number of freed descriptors
 144          * Account for wraparound
 145          */
 146         if (wq->to_clean_index <= fnic->fw_ack_index[0])
 147                 wq->ring.desc_avail += (fnic->fw_ack_index[0]
 148                                         - wq->to_clean_index + 1);
 149         else
 150                 wq->ring.desc_avail += (wq->ring.desc_count
 151                                         - wq->to_clean_index
 152                                         + fnic->fw_ack_index[0] + 1);
 153
 154         /*
 155          * just bump clean index to ack_index+1 accounting for wraparound
 156          * this will essentially free up all descriptors between
 157          * to_clean_index and fw_ack_index, both inclusive
 158          */
 159         wq->to_clean_index =
 160                 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
 161
 162         /* we have processed the acks received so far */
 163         fnic->fw_ack_recd[0] = 0;
 164         return 0;
 165 }
 166
 167
 168 /*
 169  * fnic_fw_reset_handler
 170  * Routine to send reset msg to fw
 171  */
 172 int fnic_fw_reset_handler(struct fnic *fnic)
 173 {
 174         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
 175         int ret = 0;
 176         unsigned long flags;
 177
 178         skb_queue_purge(&fnic->frame_queue);
 179         skb_queue_purge(&fnic->tx_queue);
 180
 181         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 182
 183         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 184                 free_wq_copy_descs(fnic, wq);
 185
 186         if (!vnic_wq_copy_desc_avail(wq))
 187                 ret = -EAGAIN;
 188         else
 189                 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
 190
 191         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 192
 193         if (!ret)
 194                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 195                               "Issued fw reset\n");
 196         else
 197                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 198                               "Failed to issue fw reset\n");
 199         return ret;
 200 }
 201
 202
 203 /*
 204  * fnic_flogi_reg_handler
 205  * Routine to send flogi register msg to fw
 206  */
 207 int fnic_flogi_reg_handler(struct fnic *fnic, u32 fc_id)
 208 {
 209         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
 210         enum fcpio_flogi_reg_format_type format;
 211         struct fc_lport *lp = fnic->lport;
 212         u8 gw_mac[ETH_ALEN];
 213         int ret = 0;
 214         unsigned long flags;
 215
 216         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 217
 218         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 219                 free_wq_copy_descs(fnic, wq);
 220
 221         if (!vnic_wq_copy_desc_avail(wq)) {
 222                 ret = -EAGAIN;
 223                 goto flogi_reg_ioreq_end;
 224         }
 225
 226         if (fnic->ctlr.map_dest) {
 227                 memset(gw_mac, 0xff, ETH_ALEN);
 228                 format = FCPIO_FLOGI_REG_DEF_DEST;
 229         } else {
 230                 memcpy(gw_mac, fnic->ctlr.dest_addr, ETH_ALEN);
 231                 format = FCPIO_FLOGI_REG_GW_DEST;
 232         }
 233
 234         if ((fnic->config.flags & VFCF_FIP_CAPABLE) && !fnic->ctlr.map_dest) {
 235                 fnic_queue_wq_copy_desc_fip_reg(wq, SCSI_NO_TAG,
 236                                                 fc_id, gw_mac,
 237                                                 fnic->data_src_addr,
 238                                                 lp->r_a_tov, lp->e_d_tov);
 239                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 240                               "FLOGI FIP reg issued fcid %x src %pM dest %pM\n",
 241                               fc_id, fnic->data_src_addr, gw_mac);
 242         } else {
 243                 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
 244                                                   format, fc_id, gw_mac);
 245                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 246                               "FLOGI reg issued fcid %x map %d dest %pM\n",
 247                               fc_id, fnic->ctlr.map_dest, gw_mac);
 248         }
 249
 250 flogi_reg_ioreq_end:
 251         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 252         return ret;
 253 }
 254
 255 /*
 256  * fnic_queue_wq_copy_desc
 257  * Routine to enqueue a wq copy desc
 258  */
 259 static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
 260                                           struct vnic_wq_copy *wq,
 261                                           struct fnic_io_req *io_req,
 262                                           struct scsi_cmnd *sc,
 263                                           int sg_count)
 264 {
 265         struct scatterlist *sg;
 266         struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
 267         struct fc_rport_libfc_priv *rp = rport->dd_data;
 268         struct host_sg_desc *desc;
 269         u8 pri_tag = 0;
 270         unsigned int i;
 271         unsigned long intr_flags;
 272         int flags;
 273         u8 exch_flags;
 274         struct scsi_lun fc_lun;
 275         char msg[2];
 276
 277         if (sg_count) {
 278                 /* For each SGE, create a device desc entry */
 279                 desc = io_req->sgl_list;
 280                 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
 281                         desc->addr = cpu_to_le64(sg_dma_address(sg));
 282                         desc->len = cpu_to_le32(sg_dma_len(sg));
 283                         desc->_resvd = 0;
 284                         desc++;
 285                 }
 286
 287                 io_req->sgl_list_pa = pci_map_single
 288                         (fnic->pdev,
 289                          io_req->sgl_list,
 290                          sizeof(io_req->sgl_list[0]) * sg_count,
 291                          PCI_DMA_TODEVICE);
 292         }
 293
 294         io_req->sense_buf_pa = pci_map_single(fnic->pdev,
 295                                               sc->sense_buffer,
 296                                               SCSI_SENSE_BUFFERSIZE,
 297                                               PCI_DMA_FROMDEVICE);
 298
 299         int_to_scsilun(sc->device->lun, &fc_lun);
 300
 301         pri_tag = FCPIO_ICMND_PTA_SIMPLE;
 302         msg[0] = MSG_SIMPLE_TAG;
 303         scsi_populate_tag_msg(sc, msg);
 304         if (msg[0] == MSG_ORDERED_TAG)
 305                 pri_tag = FCPIO_ICMND_PTA_ORDERED;
 306
 307         /* Enqueue the descriptor in the Copy WQ */
 308         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
 309
 310         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
 311                 free_wq_copy_descs(fnic, wq);
 312
 313         if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
 314                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 315                 return SCSI_MLQUEUE_HOST_BUSY;
 316         }
 317
 318         flags = 0;
 319         if (sc->sc_data_direction == DMA_FROM_DEVICE)
 320                 flags = FCPIO_ICMND_RDDATA;
 321         else if (sc->sc_data_direction == DMA_TO_DEVICE)
 322                 flags = FCPIO_ICMND_WRDATA;
 323
 324         exch_flags = 0;
 325         if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
 326             (rp->flags & FC_RP_FLAGS_RETRY))
 327                 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
 328
 329         fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
 330                                          0, exch_flags, io_req->sgl_cnt,
 331                                          SCSI_SENSE_BUFFERSIZE,
 332                                          io_req->sgl_list_pa,
 333                                          io_req->sense_buf_pa,
 334                                          0, /* scsi cmd ref, always 0 */
 335                                          pri_tag, /* scsi pri and tag */
 336                                          flags, /* command flags */
 337                                          sc->cmnd, sc->cmd_len,
 338                                          scsi_bufflen(sc),
 339                                          fc_lun.scsi_lun, io_req->port_id,
 340                                          rport->maxframe_size, rp->r_a_tov,
 341                                          rp->e_d_tov);
 342
 343         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
 344         return 0;
 345 }
 346
 347 /*
 348  * fnic_queuecommand
 349  * Routine to send a scsi cdb
 350  * Called with host_lock held and interrupts disabled.
 351  */
 352 static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
 353 {
 354         struct fc_lport *lp;
 355         struct fc_rport *rport;
 356         struct fnic_io_req *io_req;
 357         struct fnic *fnic;
 358         struct vnic_wq_copy *wq;
 359         int ret;
 360         int sg_count;
 361         unsigned long flags;
 362         unsigned long ptr;
 363
 364         rport = starget_to_rport(scsi_target(sc->device));
 365         ret = fc_remote_port_chkready(rport);
 366         if (ret) {
 367                 sc->result = ret;
 368                 done(sc);
 369                 return 0;
 370         }
 371
 372         lp = shost_priv(sc->device->host);
 373         if (lp->state != LPORT_ST_READY || !(lp->link_up))
 374                 return SCSI_MLQUEUE_HOST_BUSY;
 375
 376         /*
 377          * Release host lock, use driver resource specific locks from here.
 378          * Don't re-enable interrupts in case they were disabled prior to the
 379          * caller disabling them.
 380          */
 381         spin_unlock(lp->host->host_lock);
 382
 383         /* Get a new io_req for this SCSI IO */
 384         fnic = lport_priv(lp);
 385
 386         io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
 387         if (!io_req) {
 388                 ret = SCSI_MLQUEUE_HOST_BUSY;
 389                 goto out;
 390         }
 391         memset(io_req, 0, sizeof(*io_req));
 392
 393         /* Map the data buffer */
 394         sg_count = scsi_dma_map(sc);
 395         if (sg_count < 0) {
 396                 mempool_free(io_req, fnic->io_req_pool);
 397                 goto out;
 398         }
 399
 400         /* Determine the type of scatter/gather list we need */
 401         io_req->sgl_cnt = sg_count;
 402         io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
 403         if (sg_count > FNIC_DFLT_SG_DESC_CNT)
 404                 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
 405
 406         if (sg_count) {
 407                 io_req->sgl_list =
 408                         mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
 409                                       GFP_ATOMIC);
 410                 if (!io_req->sgl_list) {
 411                         ret = SCSI_MLQUEUE_HOST_BUSY;
 412                         scsi_dma_unmap(sc);
 413                         mempool_free(io_req, fnic->io_req_pool);
 414                         goto out;
 415                 }
 416
 417                 /* Cache sgl list allocated address before alignment */
 418                 io_req->sgl_list_alloc = io_req->sgl_list;
 419                 ptr = (unsigned long) io_req->sgl_list;
 420                 if (ptr % FNIC_SG_DESC_ALIGN) {
 421                         io_req->sgl_list = (struct host_sg_desc *)
 422                                 (((unsigned long) ptr
 423                                   + FNIC_SG_DESC_ALIGN - 1)
 424                                  & ~(FNIC_SG_DESC_ALIGN - 1));
 425                 }
 426         }
 427
 428         /* initialize rest of io_req */
 429         io_req->port_id = rport->port_id;
 430         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
 431         CMD_SP(sc) = (char *)io_req;
 432         sc->scsi_done = done;
 433
 434         /* create copy wq desc and enqueue it */
 435         wq = &fnic->wq_copy[0];
 436         ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
 437         if (ret) {
 438                 /*
 439                  * In case another thread cancelled the request,
 440                  * refetch the pointer under the lock.
 441                  */
 442                 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
 443
 444                 spin_lock_irqsave(io_lock, flags);
 445                 io_req = (struct fnic_io_req *)CMD_SP(sc);
 446                 CMD_SP(sc) = NULL;
 447                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 448                 spin_unlock_irqrestore(io_lock, flags);
 449                 if (io_req) {
 450                         fnic_release_ioreq_buf(fnic, io_req, sc);
 451                         mempool_free(io_req, fnic->io_req_pool);
 452                 }
 453         }
 454 out:
 455         /* acquire host lock before returning to SCSI */
 456         spin_lock(lp->host->host_lock);
 457         return ret;
 458 }
 459
 460 DEF_SCSI_QCMD(fnic_queuecommand)
 461
 462 /*
 463  * fnic_fcpio_fw_reset_cmpl_handler
 464  * Routine to handle fw reset completion
 465  */
 466 static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 467                                             struct fcpio_fw_req *desc)
 468 {
 469         u8 type;
 470         u8 hdr_status;
 471         struct fcpio_tag tag;
 472         int ret = 0;
 473         unsigned long flags;
 474
 475         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 476
 477         /* Clean up all outstanding io requests */
 478         fnic_cleanup_io(fnic, SCSI_NO_TAG);
 479
 480         spin_lock_irqsave(&fnic->fnic_lock, flags);
 481
 482         /* fnic should be in FC_TRANS_ETH_MODE */
 483         if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
 484                 /* Check status of reset completion */
 485                 if (!hdr_status) {
 486                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 487                                       "reset cmpl success\n");
 488                         /* Ready to send flogi out */
 489                         fnic->state = FNIC_IN_ETH_MODE;
 490                 } else {
 491                         FNIC_SCSI_DBG(KERN_DEBUG,
 492                                       fnic->lport->host,
 493                                       "fnic fw_reset : failed %s\n",
 494                                       fnic_fcpio_status_to_str(hdr_status));
 495
 496                         /*
 497                          * Unable to change to eth mode, cannot send out flogi
 498                          * Change state to fc mode, so that subsequent Flogi
 499                          * requests from libFC will cause more attempts to
 500                          * reset the firmware. Free the cached flogi
 501                          */
 502                         fnic->state = FNIC_IN_FC_MODE;
 503                         ret = -1;
 504                 }
 505         } else {
 506                 FNIC_SCSI_DBG(KERN_DEBUG,
 507                               fnic->lport->host,
 508                               "Unexpected state %s while processing"
 509                               " reset cmpl\n", fnic_state_to_str(fnic->state));
 510                 ret = -1;
 511         }
 512
 513         /* Thread removing device blocks till firmware reset is complete */
 514         if (fnic->remove_wait)
 515                 complete(fnic->remove_wait);
 516
 517         /*
 518          * If fnic is being removed, or fw reset failed
 519          * free the flogi frame. Else, send it out
 520          */
 521         if (fnic->remove_wait || ret) {
 522                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 523                 skb_queue_purge(&fnic->tx_queue);
 524                 goto reset_cmpl_handler_end;
 525         }
 526
 527         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 528
 529         fnic_flush_tx(fnic);
 530
 531  reset_cmpl_handler_end:
 532         return ret;
 533 }
 534
 535 /*
 536  * fnic_fcpio_flogi_reg_cmpl_handler
 537  * Routine to handle flogi register completion
 538  */
 539 static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
 540                                              struct fcpio_fw_req *desc)
 541 {
 542         u8 type;
 543         u8 hdr_status;
 544         struct fcpio_tag tag;
 545         int ret = 0;
 546         unsigned long flags;
 547
 548         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 549
 550         /* Update fnic state based on status of flogi reg completion */
 551         spin_lock_irqsave(&fnic->fnic_lock, flags);
 552
 553         if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
 554
 555                 /* Check flogi registration completion status */
 556                 if (!hdr_status) {
 557                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 558                                       "flog reg succeeded\n");
 559                         fnic->state = FNIC_IN_FC_MODE;
 560                 } else {
 561                         FNIC_SCSI_DBG(KERN_DEBUG,
 562                                       fnic->lport->host,
 563                                       "fnic flogi reg :failed %s\n",
 564                                       fnic_fcpio_status_to_str(hdr_status));
 565                         fnic->state = FNIC_IN_ETH_MODE;
 566                         ret = -1;
 567                 }
 568         } else {
 569                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 570                               "Unexpected fnic state %s while"
 571                               " processing flogi reg completion\n",
 572                               fnic_state_to_str(fnic->state));
 573                 ret = -1;
 574         }
 575
 576         if (!ret) {
 577                 if (fnic->stop_rx_link_events) {
 578                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 579                         goto reg_cmpl_handler_end;
 580                 }
 581                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 582
 583                 fnic_flush_tx(fnic);
 584                 queue_work(fnic_event_queue, &fnic->frame_work);
 585         } else {
 586                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 587         }
 588
 589 reg_cmpl_handler_end:
 590         return ret;
 591 }
 592
 593 static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
 594                                         u16 request_out)
 595 {
 596         if (wq->to_clean_index <= wq->to_use_index) {
 597                 /* out of range, stale request_out index */
 598                 if (request_out < wq->to_clean_index ||
 599                     request_out >= wq->to_use_index)
 600                         return 0;
 601         } else {
 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         }
 607         /* request_out index is in range */
 608         return 1;
 609 }
 610
 611
 612 /*
 613  * Mark that ack received and store the Ack index. If there are multiple
 614  * acks received before Tx thread cleans it up, the latest value will be
 615  * used which is correct behavior. This state should be in the copy Wq
 616  * instead of in the fnic
 617  */
 618 static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
 619                                           unsigned int cq_index,
 620                                           struct fcpio_fw_req *desc)
 621 {
 622         struct vnic_wq_copy *wq;
 623         u16 request_out = desc->u.ack.request_out;
 624         unsigned long flags;
 625
 626         /* mark the ack state */
 627         wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
 628         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 629
 630         if (is_ack_index_in_range(wq, request_out)) {
 631                 fnic->fw_ack_index[0] = request_out;
 632                 fnic->fw_ack_recd[0] = 1;
 633         }
 634         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
 635 }
 636
 637 /*
 638  * fnic_fcpio_icmnd_cmpl_handler
 639  * Routine to handle icmnd completions
 640  */
 641 static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
 642                                          struct fcpio_fw_req *desc)
 643 {
 644         u8 type;
 645         u8 hdr_status;
 646         struct fcpio_tag tag;
 647         u32 id;
 648         u64 xfer_len = 0;
 649         struct fcpio_icmnd_cmpl *icmnd_cmpl;
 650         struct fnic_io_req *io_req;
 651         struct scsi_cmnd *sc;
 652         unsigned long flags;
 653         spinlock_t *io_lock;
 654
 655         /* Decode the cmpl description to get the io_req id */
 656         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 657         fcpio_tag_id_dec(&tag, &id);
 658
 659         if (id >= FNIC_MAX_IO_REQ)
 660                 return;
 661
 662         sc = scsi_host_find_tag(fnic->lport->host, id);
 663         WARN_ON_ONCE(!sc);
 664         if (!sc)
 665                 return;
 666
 667         io_lock = fnic_io_lock_hash(fnic, sc);
 668         spin_lock_irqsave(io_lock, flags);
 669         io_req = (struct fnic_io_req *)CMD_SP(sc);
 670         WARN_ON_ONCE(!io_req);
 671         if (!io_req) {
 672                 spin_unlock_irqrestore(io_lock, flags);
 673                 return;
 674         }
 675
 676         /* firmware completed the io */
 677         io_req->io_completed = 1;
 678
 679         /*
 680          *  if SCSI-ML has already issued abort on this command,
 681          * ignore completion of the IO. The abts path will clean it up
 682          */
 683         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
 684                 spin_unlock_irqrestore(io_lock, flags);
 685                 return;
 686         }
 687
 688         /* Mark the IO as complete */
 689         CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 690
 691         icmnd_cmpl = &desc->u.icmnd_cmpl;
 692
 693         switch (hdr_status) {
 694         case FCPIO_SUCCESS:
 695                 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
 696                 xfer_len = scsi_bufflen(sc);
 697                 scsi_set_resid(sc, icmnd_cmpl->residual);
 698
 699                 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
 700                         xfer_len -= icmnd_cmpl->residual;
 701
 702                 /*
 703                  * If queue_full, then try to reduce queue depth for all
 704                  * LUNS on the target. Todo: this should be accompanied
 705                  * by a periodic queue_depth rampup based on successful
 706                  * IO completion.
 707                  */
 708                 if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
 709                         struct scsi_device *t_sdev;
 710                         int qd = 0;
 711
 712                         shost_for_each_device(t_sdev, sc->device->host) {
 713                                 if (t_sdev->id != sc->device->id)
 714                                         continue;
 715
 716                                 if (t_sdev->queue_depth > 1) {
 717                                         qd = scsi_track_queue_full
 718                                                 (t_sdev,
 719                                                  t_sdev->queue_depth - 1);
 720                                         if (qd == -1)
 721                                                 qd = t_sdev->host->cmd_per_lun;
 722                                         shost_printk(KERN_INFO,
 723                                                      fnic->lport->host,
 724                                                      "scsi[%d:%d:%d:%d"
 725                                                      "] queue full detected,"
 726                                                      "new depth = %d\n",
 727                                                      t_sdev->host->host_no,
 728                                                      t_sdev->channel,
 729                                                      t_sdev->id, t_sdev->lun,
 730                                                      t_sdev->queue_depth);
 731                                 }
 732                         }
 733                 }
 734                 break;
 735
 736         case FCPIO_TIMEOUT:          /* request was timed out */
 737                 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
 738                 break;
 739
 740         case FCPIO_ABORTED:          /* request was aborted */
 741                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 742                 break;
 743
 744         case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
 745                 scsi_set_resid(sc, icmnd_cmpl->residual);
 746                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 747                 break;
 748
 749         case FCPIO_OUT_OF_RESOURCE:  /* out of resources to complete request */
 750                 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
 751                 break;
 752         case FCPIO_INVALID_HEADER:   /* header contains invalid data */
 753         case FCPIO_INVALID_PARAM:    /* some parameter in request invalid */
 754         case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
 755         case FCPIO_IO_NOT_FOUND:     /* requested I/O was not found */
 756         case FCPIO_SGL_INVALID:      /* request was aborted due to sgl error */
 757         case FCPIO_MSS_INVALID:      /* request was aborted due to mss error */
 758         case FCPIO_FW_ERR:           /* request was terminated due fw error */
 759         default:
 760                 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
 761                              fnic_fcpio_status_to_str(hdr_status));
 762                 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
 763                 break;
 764         }
 765
 766         /* Break link with the SCSI command */
 767         CMD_SP(sc) = NULL;
 768
 769         spin_unlock_irqrestore(io_lock, flags);
 770
 771         fnic_release_ioreq_buf(fnic, io_req, sc);
 772
 773         mempool_free(io_req, fnic->io_req_pool);
 774
 775         if (sc->sc_data_direction == DMA_FROM_DEVICE) {
 776                 fnic->lport->host_stats.fcp_input_requests++;
 777                 fnic->fcp_input_bytes += xfer_len;
 778         } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
 779                 fnic->lport->host_stats.fcp_output_requests++;
 780                 fnic->fcp_output_bytes += xfer_len;
 781         } else
 782                 fnic->lport->host_stats.fcp_control_requests++;
 783
 784         /* Call SCSI completion function to complete the IO */
 785         if (sc->scsi_done)
 786                 sc->scsi_done(sc);
 787
 788 }
 789
 790 /* fnic_fcpio_itmf_cmpl_handler
 791  * Routine to handle itmf completions
 792  */
 793 static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
 794                                         struct fcpio_fw_req *desc)
 795 {
 796         u8 type;
 797         u8 hdr_status;
 798         struct fcpio_tag tag;
 799         u32 id;
 800         struct scsi_cmnd *sc;
 801         struct fnic_io_req *io_req;
 802         unsigned long flags;
 803         spinlock_t *io_lock;
 804
 805         fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
 806         fcpio_tag_id_dec(&tag, &id);
 807
 808         if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
 809                 return;
 810
 811         sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
 812         WARN_ON_ONCE(!sc);
 813         if (!sc)
 814                 return;
 815
 816         io_lock = fnic_io_lock_hash(fnic, sc);
 817         spin_lock_irqsave(io_lock, flags);
 818         io_req = (struct fnic_io_req *)CMD_SP(sc);
 819         WARN_ON_ONCE(!io_req);
 820         if (!io_req) {
 821                 spin_unlock_irqrestore(io_lock, flags);
 822                 return;
 823         }
 824
 825         if (id & FNIC_TAG_ABORT) {
 826                 /* Completion of abort cmd */
 827                 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
 828                         /* This is a late completion. Ignore it */
 829                         spin_unlock_irqrestore(io_lock, flags);
 830                         return;
 831                 }
 832                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
 833                 CMD_ABTS_STATUS(sc) = hdr_status;
 834
 835                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 836                               "abts cmpl recd. id %d status %s\n",
 837                               (int)(id & FNIC_TAG_MASK),
 838                               fnic_fcpio_status_to_str(hdr_status));
 839
 840                 /*
 841                  * If scsi_eh thread is blocked waiting for abts to complete,
 842                  * signal completion to it. IO will be cleaned in the thread
 843                  * else clean it in this context
 844                  */
 845                 if (io_req->abts_done) {
 846                         complete(io_req->abts_done);
 847                         spin_unlock_irqrestore(io_lock, flags);
 848                 } else {
 849                         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 850                                       "abts cmpl, completing IO\n");
 851                         CMD_SP(sc) = NULL;
 852                         sc->result = (DID_ERROR << 16);
 853
 854                         spin_unlock_irqrestore(io_lock, flags);
 855
 856                         fnic_release_ioreq_buf(fnic, io_req, sc);
 857                         mempool_free(io_req, fnic->io_req_pool);
 858                         if (sc->scsi_done)
 859                                 sc->scsi_done(sc);
 860                 }
 861
 862         } else if (id & FNIC_TAG_DEV_RST) {
 863                 /* Completion of device reset */
 864                 CMD_LR_STATUS(sc) = hdr_status;
 865                 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
 866                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 867                               "dev reset cmpl recd. id %d status %s\n",
 868                               (int)(id & FNIC_TAG_MASK),
 869                               fnic_fcpio_status_to_str(hdr_status));
 870                 if (io_req->dr_done)
 871                         complete(io_req->dr_done);
 872                 spin_unlock_irqrestore(io_lock, flags);
 873
 874         } else {
 875                 shost_printk(KERN_ERR, fnic->lport->host,
 876                              "Unexpected itmf io state %s tag %x\n",
 877                              fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
 878                 spin_unlock_irqrestore(io_lock, flags);
 879         }
 880
 881 }
 882
 883 /*
 884  * fnic_fcpio_cmpl_handler
 885  * Routine to service the cq for wq_copy
 886  */
 887 static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
 888                                    unsigned int cq_index,
 889                                    struct fcpio_fw_req *desc)
 890 {
 891         struct fnic *fnic = vnic_dev_priv(vdev);
 892         int ret = 0;
 893
 894         switch (desc->hdr.type) {
 895         case FCPIO_ACK: /* fw copied copy wq desc to its queue */
 896                 fnic_fcpio_ack_handler(fnic, cq_index, desc);
 897                 break;
 898
 899         case FCPIO_ICMND_CMPL: /* fw completed a command */
 900                 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
 901                 break;
 902
 903         case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
 904                 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
 905                 break;
 906
 907         case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
 908         case FCPIO_FLOGI_FIP_REG_CMPL: /* fw completed flogi_fip_reg */
 909                 ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
 910                 break;
 911
 912         case FCPIO_RESET_CMPL: /* fw completed reset */
 913                 ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
 914                 break;
 915
 916         default:
 917                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 918                               "firmware completion type %d\n",
 919                               desc->hdr.type);
 920                 break;
 921         }
 922
 923         return ret;
 924 }
 925
 926 /*
 927  * fnic_wq_copy_cmpl_handler
 928  * Routine to process wq copy
 929  */
 930 int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
 931 {
 932         unsigned int wq_work_done = 0;
 933         unsigned int i, cq_index;
 934         unsigned int cur_work_done;
 935
 936         for (i = 0; i < fnic->wq_copy_count; i++) {
 937                 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
 938                 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
 939                                                      fnic_fcpio_cmpl_handler,
 940                                                      copy_work_to_do);
 941                 wq_work_done += cur_work_done;
 942         }
 943         return wq_work_done;
 944 }
 945
 946 static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
 947 {
 948         unsigned int i;
 949         struct fnic_io_req *io_req;
 950         unsigned long flags = 0;
 951         struct scsi_cmnd *sc;
 952         spinlock_t *io_lock;
 953
 954         for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
 955                 if (i == exclude_id)
 956                         continue;
 957
 958                 sc = scsi_host_find_tag(fnic->lport->host, i);
 959                 if (!sc)
 960                         continue;
 961
 962                 io_lock = fnic_io_lock_hash(fnic, sc);
 963                 spin_lock_irqsave(io_lock, flags);
 964                 io_req = (struct fnic_io_req *)CMD_SP(sc);
 965                 if (!io_req) {
 966                         spin_unlock_irqrestore(io_lock, flags);
 967                         goto cleanup_scsi_cmd;
 968                 }
 969
 970                 CMD_SP(sc) = NULL;
 971
 972                 spin_unlock_irqrestore(io_lock, flags);
 973
 974                 /*
 975                  * If there is a scsi_cmnd associated with this io_req, then
 976                  * free the corresponding state
 977                  */
 978                 fnic_release_ioreq_buf(fnic, io_req, sc);
 979                 mempool_free(io_req, fnic->io_req_pool);
 980
 981 cleanup_scsi_cmd:
 982                 sc->result = DID_TRANSPORT_DISRUPTED << 16;
 983                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
 984                               " DID_TRANSPORT_DISRUPTED\n");
 985
 986                 /* Complete the command to SCSI */
 987                 if (sc->scsi_done)
 988                         sc->scsi_done(sc);
 989         }
 990 }
 991
 992 void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
 993                                   struct fcpio_host_req *desc)
 994 {
 995         u32 id;
 996         struct fnic *fnic = vnic_dev_priv(wq->vdev);
 997         struct fnic_io_req *io_req;
 998         struct scsi_cmnd *sc;
 999         unsigned long flags;
1000         spinlock_t *io_lock;
1001
1002         /* get the tag reference */
1003         fcpio_tag_id_dec(&desc->hdr.tag, &id);
1004         id &= FNIC_TAG_MASK;
1005
1006         if (id >= FNIC_MAX_IO_REQ)
1007                 return;
1008
1009         sc = scsi_host_find_tag(fnic->lport->host, id);
1010         if (!sc)
1011                 return;
1012
1013         io_lock = fnic_io_lock_hash(fnic, sc);
1014         spin_lock_irqsave(io_lock, flags);
1015
1016         /* Get the IO context which this desc refers to */
1017         io_req = (struct fnic_io_req *)CMD_SP(sc);
1018
1019         /* fnic interrupts are turned off by now */
1020
1021         if (!io_req) {
1022                 spin_unlock_irqrestore(io_lock, flags);
1023                 goto wq_copy_cleanup_scsi_cmd;
1024         }
1025
1026         CMD_SP(sc) = NULL;
1027
1028         spin_unlock_irqrestore(io_lock, flags);
1029
1030         fnic_release_ioreq_buf(fnic, io_req, sc);
1031         mempool_free(io_req, fnic->io_req_pool);
1032
1033 wq_copy_cleanup_scsi_cmd:
1034         sc->result = DID_NO_CONNECT << 16;
1035         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1036                       " DID_NO_CONNECT\n");
1037
1038         if (sc->scsi_done)
1039                 sc->scsi_done(sc);
1040 }
1041
1042 static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1043                                           u32 task_req, u8 *fc_lun,
1044                                           struct fnic_io_req *io_req)
1045 {
1046         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1047         unsigned long flags;
1048
1049         spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1050
1051         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1052                 free_wq_copy_descs(fnic, wq);
1053
1054         if (!vnic_wq_copy_desc_avail(wq)) {
1055                 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1056                 return 1;
1057         }
1058         fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1059                                      0, task_req, tag, fc_lun, io_req->port_id,
1060                                      fnic->config.ra_tov, fnic->config.ed_tov);
1061
1062         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1063         return 0;
1064 }
1065
1066 void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1067 {
1068         int tag;
1069         struct fnic_io_req *io_req;
1070         spinlock_t *io_lock;
1071         unsigned long flags;
1072         struct scsi_cmnd *sc;
1073         struct scsi_lun fc_lun;
1074         enum fnic_ioreq_state old_ioreq_state;
1075
1076         FNIC_SCSI_DBG(KERN_DEBUG,
1077                       fnic->lport->host,
1078                       "fnic_rport_reset_exch called portid 0x%06x\n",
1079                       port_id);
1080
1081         if (fnic->in_remove)
1082                 return;
1083
1084         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1085                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1086                 if (!sc)
1087                         continue;
1088
1089                 io_lock = fnic_io_lock_hash(fnic, sc);
1090                 spin_lock_irqsave(io_lock, flags);
1091
1092                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1093
1094                 if (!io_req || io_req->port_id != port_id) {
1095                         spin_unlock_irqrestore(io_lock, flags);
1096                         continue;
1097                 }
1098
1099                 /*
1100                  * Found IO that is still pending with firmware and
1101                  * belongs to rport that went away
1102                  */
1103                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1104                         spin_unlock_irqrestore(io_lock, flags);
1105                         continue;
1106                 }
1107                 old_ioreq_state = CMD_STATE(sc);
1108                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1109                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1110
1111                 BUG_ON(io_req->abts_done);
1112
1113                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1114                               "fnic_rport_reset_exch: Issuing abts\n");
1115
1116                 spin_unlock_irqrestore(io_lock, flags);
1117
1118                 /* Now queue the abort command to firmware */
1119                 int_to_scsilun(sc->device->lun, &fc_lun);
1120
1121                 if (fnic_queue_abort_io_req(fnic, tag,
1122                                             FCPIO_ITMF_ABT_TASK_TERM,
1123                                             fc_lun.scsi_lun, io_req)) {
1124                         /*
1125                          * Revert the cmd state back to old state, if
1126                          * it hasn't changed in between. This cmd will get
1127                          * aborted later by scsi_eh, or cleaned up during
1128                          * lun reset
1129                          */
1130                         io_lock = fnic_io_lock_hash(fnic, sc);
1131
1132                         spin_lock_irqsave(io_lock, flags);
1133                         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1134                                 CMD_STATE(sc) = old_ioreq_state;
1135                         spin_unlock_irqrestore(io_lock, flags);
1136                 }
1137         }
1138
1139 }
1140
1141 void fnic_terminate_rport_io(struct fc_rport *rport)
1142 {
1143         int tag;
1144         struct fnic_io_req *io_req;
1145         spinlock_t *io_lock;
1146         unsigned long flags;
1147         struct scsi_cmnd *sc;
1148         struct scsi_lun fc_lun;
1149         struct fc_rport_libfc_priv *rdata = rport->dd_data;
1150         struct fc_lport *lport = rdata->local_port;
1151         struct fnic *fnic = lport_priv(lport);
1152         struct fc_rport *cmd_rport;
1153         enum fnic_ioreq_state old_ioreq_state;
1154
1155         FNIC_SCSI_DBG(KERN_DEBUG,
1156                       fnic->lport->host, "fnic_terminate_rport_io called"
1157                       " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
1158                       rport->port_name, rport->node_name,
1159                       rport->port_id);
1160
1161         if (fnic->in_remove)
1162                 return;
1163
1164         for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1165                 sc = scsi_host_find_tag(fnic->lport->host, tag);
1166                 if (!sc)
1167                         continue;
1168
1169                 cmd_rport = starget_to_rport(scsi_target(sc->device));
1170                 if (rport != cmd_rport)
1171                         continue;
1172
1173                 io_lock = fnic_io_lock_hash(fnic, sc);
1174                 spin_lock_irqsave(io_lock, flags);
1175
1176                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1177
1178                 if (!io_req || rport != cmd_rport) {
1179                         spin_unlock_irqrestore(io_lock, flags);
1180                         continue;
1181                 }
1182
1183                 /*
1184                  * Found IO that is still pending with firmware and
1185                  * belongs to rport that went away
1186                  */
1187                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1188                         spin_unlock_irqrestore(io_lock, flags);
1189                         continue;
1190                 }
1191                 old_ioreq_state = CMD_STATE(sc);
1192                 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1193                 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1194
1195                 BUG_ON(io_req->abts_done);
1196
1197                 FNIC_SCSI_DBG(KERN_DEBUG,
1198                               fnic->lport->host,
1199                               "fnic_terminate_rport_io: Issuing abts\n");
1200
1201                 spin_unlock_irqrestore(io_lock, flags);
1202
1203                 /* Now queue the abort command to firmware */
1204                 int_to_scsilun(sc->device->lun, &fc_lun);
1205
1206                 if (fnic_queue_abort_io_req(fnic, tag,
1207                                             FCPIO_ITMF_ABT_TASK_TERM,
1208                                             fc_lun.scsi_lun, io_req)) {
1209                         /*
1210                          * Revert the cmd state back to old state, if
1211                          * it hasn't changed in between. This cmd will get
1212                          * aborted later by scsi_eh, or cleaned up during
1213                          * lun reset
1214                          */
1215                         io_lock = fnic_io_lock_hash(fnic, sc);
1216
1217                         spin_lock_irqsave(io_lock, flags);
1218                         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1219                                 CMD_STATE(sc) = old_ioreq_state;
1220                         spin_unlock_irqrestore(io_lock, flags);
1221                 }
1222         }
1223
1224 }
1225
1226 /*
1227  * This function is exported to SCSI for sending abort cmnds.
1228  * A SCSI IO is represented by a io_req in the driver.
1229  * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1230  */
1231 int fnic_abort_cmd(struct scsi_cmnd *sc)
1232 {
1233         struct fc_lport *lp;
1234         struct fnic *fnic;
1235         struct fnic_io_req *io_req;
1236         struct fc_rport *rport;
1237         spinlock_t *io_lock;
1238         unsigned long flags;
1239         int ret = SUCCESS;
1240         u32 task_req;
1241         struct scsi_lun fc_lun;
1242         DECLARE_COMPLETION_ONSTACK(tm_done);
1243
1244         /* Wait for rport to unblock */
1245         fc_block_scsi_eh(sc);
1246
1247         /* Get local-port, check ready and link up */
1248         lp = shost_priv(sc->device->host);
1249
1250         fnic = lport_priv(lp);
1251         rport = starget_to_rport(scsi_target(sc->device));
1252         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1253                         "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
1254                         rport->port_id, sc->device->lun, sc->request->tag);
1255
1256         if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1257                 ret = FAILED;
1258                 goto fnic_abort_cmd_end;
1259         }
1260
1261         /*
1262          * Avoid a race between SCSI issuing the abort and the device
1263          * completing the command.
1264          *
1265          * If the command is already completed by the fw cmpl code,
1266          * we just return SUCCESS from here. This means that the abort
1267          * succeeded. In the SCSI ML, since the timeout for command has
1268          * happened, the completion wont actually complete the command
1269          * and it will be considered as an aborted command
1270          *
1271          * The CMD_SP will not be cleared except while holding io_req_lock.
1272          */
1273         io_lock = fnic_io_lock_hash(fnic, sc);
1274         spin_lock_irqsave(io_lock, flags);
1275         io_req = (struct fnic_io_req *)CMD_SP(sc);
1276         if (!io_req) {
1277                 spin_unlock_irqrestore(io_lock, flags);
1278                 goto fnic_abort_cmd_end;
1279         }
1280
1281         io_req->abts_done = &tm_done;
1282
1283         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1284                 spin_unlock_irqrestore(io_lock, flags);
1285                 goto wait_pending;
1286         }
1287         /*
1288          * Command is still pending, need to abort it
1289          * If the firmware completes the command after this point,
1290          * the completion wont be done till mid-layer, since abort
1291          * has already started.
1292          */
1293         CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1294         CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1295
1296         spin_unlock_irqrestore(io_lock, flags);
1297
1298         /*
1299          * Check readiness of the remote port. If the path to remote
1300          * port is up, then send abts to the remote port to terminate
1301          * the IO. Else, just locally terminate the IO in the firmware
1302          */
1303         if (fc_remote_port_chkready(rport) == 0)
1304                 task_req = FCPIO_ITMF_ABT_TASK;
1305         else
1306                 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1307
1308         /* Now queue the abort command to firmware */
1309         int_to_scsilun(sc->device->lun, &fc_lun);
1310
1311         if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1312                                     fc_lun.scsi_lun, io_req)) {
1313                 spin_lock_irqsave(io_lock, flags);
1314                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1315                 if (io_req)
1316                         io_req->abts_done = NULL;
1317                 spin_unlock_irqrestore(io_lock, flags);
1318                 ret = FAILED;
1319                 goto fnic_abort_cmd_end;
1320         }
1321
1322         /*
1323          * We queued an abort IO, wait for its completion.
1324          * Once the firmware completes the abort command, it will
1325          * wake up this thread.
1326          */
1327  wait_pending:
1328         wait_for_completion_timeout(&tm_done,
1329                                     msecs_to_jiffies
1330                                     (2 * fnic->config.ra_tov +
1331                                      fnic->config.ed_tov));
1332
1333         /* Check the abort status */
1334         spin_lock_irqsave(io_lock, flags);
1335
1336         io_req = (struct fnic_io_req *)CMD_SP(sc);
1337         if (!io_req) {
1338                 spin_unlock_irqrestore(io_lock, flags);
1339                 ret = FAILED;
1340                 goto fnic_abort_cmd_end;
1341         }
1342         io_req->abts_done = NULL;
1343
1344         /* fw did not complete abort, timed out */
1345         if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1346                 spin_unlock_irqrestore(io_lock, flags);
1347                 ret = FAILED;
1348                 goto fnic_abort_cmd_end;
1349         }
1350
1351         /*
1352          * firmware completed the abort, check the status,
1353          * free the io_req irrespective of failure or success
1354          */
1355         if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1356                 ret = FAILED;
1357
1358         CMD_SP(sc) = NULL;
1359
1360         spin_unlock_irqrestore(io_lock, flags);
1361
1362         fnic_release_ioreq_buf(fnic, io_req, sc);
1363         mempool_free(io_req, fnic->io_req_pool);
1364
1365 fnic_abort_cmd_end:
1366         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1367                       "Returning from abort cmd %s\n",
1368                       (ret == SUCCESS) ?
1369                       "SUCCESS" : "FAILED");
1370         return ret;
1371 }
1372
1373 static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1374                                        struct scsi_cmnd *sc,
1375                                        struct fnic_io_req *io_req)
1376 {
1377         struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1378         struct scsi_lun fc_lun;
1379         int ret = 0;
1380         unsigned long intr_flags;
1381
1382         spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1383
1384         if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1385                 free_wq_copy_descs(fnic, wq);
1386
1387         if (!vnic_wq_copy_desc_avail(wq)) {
1388                 ret = -EAGAIN;
1389                 goto lr_io_req_end;
1390         }
1391
1392         /* fill in the lun info */
1393         int_to_scsilun(sc->device->lun, &fc_lun);
1394
1395         fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1396                                      0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1397                                      fc_lun.scsi_lun, io_req->port_id,
1398                                      fnic->config.ra_tov, fnic->config.ed_tov);
1399
1400 lr_io_req_end:
1401         spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1402
1403         return ret;
1404 }
1405
1406 /*
1407  * Clean up any pending aborts on the lun
1408  * For each outstanding IO on this lun, whose abort is not completed by fw,
1409  * issue a local abort. Wait for abort to complete. Return 0 if all commands
1410  * successfully aborted, 1 otherwise
1411  */
1412 static int fnic_clean_pending_aborts(struct fnic *fnic,
1413                                      struct scsi_cmnd *lr_sc)
1414 {
1415         int tag;
1416         struct fnic_io_req *io_req;
1417         spinlock_t *io_lock;
1418         unsigned long flags;
1419         int ret = 0;
1420         struct scsi_cmnd *sc;
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
1461                 if (fnic_queue_abort_io_req(fnic, tag,
1462                                             FCPIO_ITMF_ABT_TASK_TERM,
1463                                             fc_lun.scsi_lun, io_req)) {
1464                         spin_lock_irqsave(io_lock, flags);
1465                         io_req = (struct fnic_io_req *)CMD_SP(sc);
1466                         if (io_req)
1467                                 io_req->abts_done = NULL;
1468                         spin_unlock_irqrestore(io_lock, flags);
1469                         ret = 1;
1470                         goto clean_pending_aborts_end;
1471                 }
1472
1473                 wait_for_completion_timeout(&tm_done,
1474                                             msecs_to_jiffies
1475                                             (fnic->config.ed_tov));
1476
1477                 /* Recheck cmd state to check if it is now aborted */
1478                 spin_lock_irqsave(io_lock, flags);
1479                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1480                 if (!io_req) {
1481                         spin_unlock_irqrestore(io_lock, flags);
1482                         ret = 1;
1483                         goto clean_pending_aborts_end;
1484                 }
1485
1486                 io_req->abts_done = NULL;
1487
1488                 /* if abort is still pending with fw, fail */
1489                 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1490                         spin_unlock_irqrestore(io_lock, flags);
1491                         ret = 1;
1492                         goto clean_pending_aborts_end;
1493                 }
1494                 CMD_SP(sc) = NULL;
1495                 spin_unlock_irqrestore(io_lock, flags);
1496
1497                 fnic_release_ioreq_buf(fnic, io_req, sc);
1498                 mempool_free(io_req, fnic->io_req_pool);
1499         }
1500
1501 clean_pending_aborts_end:
1502         return ret;
1503 }
1504
1505 /*
1506  * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
1507  * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
1508  * on the LUN.
1509  */
1510 int fnic_device_reset(struct scsi_cmnd *sc)
1511 {
1512         struct fc_lport *lp;
1513         struct fnic *fnic;
1514         struct fnic_io_req *io_req;
1515         struct fc_rport *rport;
1516         int status;
1517         int ret = FAILED;
1518         spinlock_t *io_lock;
1519         unsigned long flags;
1520         DECLARE_COMPLETION_ONSTACK(tm_done);
1521
1522         /* Wait for rport to unblock */
1523         fc_block_scsi_eh(sc);
1524
1525         /* Get local-port, check ready and link up */
1526         lp = shost_priv(sc->device->host);
1527
1528         fnic = lport_priv(lp);
1529
1530         rport = starget_to_rport(scsi_target(sc->device));
1531         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1532                         "Device reset called FCID 0x%x, LUN 0x%x\n",
1533                         rport->port_id, sc->device->lun);
1534
1535         if (lp->state != LPORT_ST_READY || !(lp->link_up))
1536                 goto fnic_device_reset_end;
1537
1538         /* Check if remote port up */
1539         if (fc_remote_port_chkready(rport))
1540                 goto fnic_device_reset_end;
1541
1542         io_lock = fnic_io_lock_hash(fnic, sc);
1543         spin_lock_irqsave(io_lock, flags);
1544         io_req = (struct fnic_io_req *)CMD_SP(sc);
1545
1546         /*
1547          * If there is a io_req attached to this command, then use it,
1548          * else allocate a new one.
1549          */
1550         if (!io_req) {
1551                 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
1552                 if (!io_req) {
1553                         spin_unlock_irqrestore(io_lock, flags);
1554                         goto fnic_device_reset_end;
1555                 }
1556                 memset(io_req, 0, sizeof(*io_req));
1557                 io_req->port_id = rport->port_id;
1558                 CMD_SP(sc) = (char *)io_req;
1559         }
1560         io_req->dr_done = &tm_done;
1561         CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
1562         CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
1563         spin_unlock_irqrestore(io_lock, flags);
1564
1565         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n",
1566                       sc->request->tag);
1567
1568         /*
1569          * issue the device reset, if enqueue failed, clean up the ioreq
1570          * and break assoc with scsi cmd
1571          */
1572         if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
1573                 spin_lock_irqsave(io_lock, flags);
1574                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1575                 if (io_req)
1576                         io_req->dr_done = NULL;
1577                 goto fnic_device_reset_clean;
1578         }
1579
1580         /*
1581          * Wait on the local completion for LUN reset.  The io_req may be
1582          * freed while we wait since we hold no lock.
1583          */
1584         wait_for_completion_timeout(&tm_done,
1585                                     msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
1586
1587         spin_lock_irqsave(io_lock, flags);
1588         io_req = (struct fnic_io_req *)CMD_SP(sc);
1589         if (!io_req) {
1590                 spin_unlock_irqrestore(io_lock, flags);
1591                 goto fnic_device_reset_end;
1592         }
1593         io_req->dr_done = NULL;
1594
1595         status = CMD_LR_STATUS(sc);
1596         spin_unlock_irqrestore(io_lock, flags);
1597
1598         /*
1599          * If lun reset not completed, bail out with failed. io_req
1600          * gets cleaned up during higher levels of EH
1601          */
1602         if (status == FCPIO_INVALID_CODE) {
1603                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1604                               "Device reset timed out\n");
1605                 goto fnic_device_reset_end;
1606         }
1607
1608         /* Completed, but not successful, clean up the io_req, return fail */
1609         if (status != FCPIO_SUCCESS) {
1610                 spin_lock_irqsave(io_lock, flags);
1611                 FNIC_SCSI_DBG(KERN_DEBUG,
1612                               fnic->lport->host,
1613                               "Device reset completed - failed\n");
1614                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1615                 goto fnic_device_reset_clean;
1616         }
1617
1618         /*
1619          * Clean up any aborts on this lun that have still not
1620          * completed. If any of these fail, then LUN reset fails.
1621          * clean_pending_aborts cleans all cmds on this lun except
1622          * the lun reset cmd. If all cmds get cleaned, the lun reset
1623          * succeeds
1624          */
1625         if (fnic_clean_pending_aborts(fnic, sc)) {
1626                 spin_lock_irqsave(io_lock, flags);
1627                 io_req = (struct fnic_io_req *)CMD_SP(sc);
1628                 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1629                               "Device reset failed"
1630                               " since could not abort all IOs\n");
1631                 goto fnic_device_reset_clean;
1632         }
1633
1634         /* Clean lun reset command */
1635         spin_lock_irqsave(io_lock, flags);
1636         io_req = (struct fnic_io_req *)CMD_SP(sc);
1637         if (io_req)
1638                 /* Completed, and successful */
1639                 ret = SUCCESS;
1640
1641 fnic_device_reset_clean:
1642         if (io_req)
1643                 CMD_SP(sc) = NULL;
1644
1645         spin_unlock_irqrestore(io_lock, flags);
1646
1647         if (io_req) {
1648                 fnic_release_ioreq_buf(fnic, io_req, sc);
1649                 mempool_free(io_req, fnic->io_req_pool);
1650         }
1651
1652 fnic_device_reset_end:
1653         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1654                       "Returning from device reset %s\n",
1655                       (ret == SUCCESS) ?
1656                       "SUCCESS" : "FAILED");
1657         return ret;
1658 }
1659
1660 /* Clean up all IOs, clean up libFC local port */
1661 int fnic_reset(struct Scsi_Host *shost)
1662 {
1663         struct fc_lport *lp;
1664         struct fnic *fnic;
1665         int ret = SUCCESS;
1666
1667         lp = shost_priv(shost);
1668         fnic = lport_priv(lp);
1669
1670         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1671                       "fnic_reset called\n");
1672
1673         /*
1674          * Reset local port, this will clean up libFC exchanges,
1675          * reset remote port sessions, and if link is up, begin flogi
1676          */
1677         if (lp->tt.lport_reset(lp))
1678                 ret = FAILED;
1679
1680         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1681                       "Returning from fnic reset %s\n",
1682                       (ret == SUCCESS) ?
1683                       "SUCCESS" : "FAILED");
1684
1685         return ret;
1686 }
1687
1688 /*
1689  * SCSI Error handling calls driver's eh_host_reset if all prior
1690  * error handling levels return FAILED. If host reset completes
1691  * successfully, and if link is up, then Fabric login begins.
1692  *
1693  * Host Reset is the highest level of error recovery. If this fails, then
1694  * host is offlined by SCSI.
1695  *
1696  */
1697 int fnic_host_reset(struct scsi_cmnd *sc)
1698 {
1699         int ret;
1700         unsigned long wait_host_tmo;
1701         struct Scsi_Host *shost = sc->device->host;
1702         struct fc_lport *lp = shost_priv(shost);
1703
1704         /*
1705          * If fnic_reset is successful, wait for fabric login to complete
1706          * scsi-ml tries to send a TUR to every device if host reset is
1707          * successful, so before returning to scsi, fabric should be up
1708          */
1709         ret = fnic_reset(shost);
1710         if (ret == SUCCESS) {
1711                 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
1712                 ret = FAILED;
1713                 while (time_before(jiffies, wait_host_tmo)) {
1714                         if ((lp->state == LPORT_ST_READY) &&
1715                             (lp->link_up)) {
1716                                 ret = SUCCESS;
1717                                 break;
1718                         }
1719                         ssleep(1);
1720                 }
1721         }
1722
1723         return ret;
1724 }
1725
1726 /*
1727  * This fxn is called from libFC when host is removed
1728  */
1729 void fnic_scsi_abort_io(struct fc_lport *lp)
1730 {
1731         int err = 0;
1732         unsigned long flags;
1733         enum fnic_state old_state;
1734         struct fnic *fnic = lport_priv(lp);
1735         DECLARE_COMPLETION_ONSTACK(remove_wait);
1736
1737         /* Issue firmware reset for fnic, wait for reset to complete */
1738         spin_lock_irqsave(&fnic->fnic_lock, flags);
1739         fnic->remove_wait = &remove_wait;
1740         old_state = fnic->state;
1741         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1742         fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
1743         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1744
1745         err = fnic_fw_reset_handler(fnic);
1746         if (err) {
1747                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1748                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1749                         fnic->state = old_state;
1750                 fnic->remove_wait = NULL;
1751                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1752                 return;
1753         }
1754
1755         /* Wait for firmware reset to complete */
1756         wait_for_completion_timeout(&remove_wait,
1757                                     msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
1758
1759         spin_lock_irqsave(&fnic->fnic_lock, flags);
1760         fnic->remove_wait = NULL;
1761         FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1762                       "fnic_scsi_abort_io %s\n",
1763                       (fnic->state == FNIC_IN_ETH_MODE) ?
1764                       "SUCCESS" : "FAILED");
1765         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1766
1767 }
1768
1769 /*
1770  * This fxn called from libFC to clean up driver IO state on link down
1771  */
1772 void fnic_scsi_cleanup(struct fc_lport *lp)
1773 {
1774         unsigned long flags;
1775         enum fnic_state old_state;
1776         struct fnic *fnic = lport_priv(lp);
1777
1778         /* issue fw reset */
1779         spin_lock_irqsave(&fnic->fnic_lock, flags);
1780         old_state = fnic->state;
1781         fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1782         fnic_update_mac_locked(fnic, fnic->ctlr.ctl_src_addr);
1783         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1784
1785         if (fnic_fw_reset_handler(fnic)) {
1786                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1787                 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1788                         fnic->state = old_state;
1789                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1790         }
1791
1792 }
1793
1794 void fnic_empty_scsi_cleanup(struct fc_lport *lp)
1795 {
1796 }
1797
1798 void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
1799 {
1800         struct fnic *fnic = lport_priv(lp);
1801
1802         /* Non-zero sid, nothing to do */
1803         if (sid)
1804                 goto call_fc_exch_mgr_reset;
1805
1806         if (did) {
1807                 fnic_rport_exch_reset(fnic, did);
1808                 goto call_fc_exch_mgr_reset;
1809         }
1810
1811         /*
1812          * sid = 0, did = 0
1813          * link down or device being removed
1814          */
1815         if (!fnic->in_remove)
1816                 fnic_scsi_cleanup(lp);
1817         else
1818                 fnic_scsi_abort_io(lp);
1819
1820         /* call libFC exch mgr reset to reset its exchanges */
1821 call_fc_exch_mgr_reset:
1822         fc_exch_mgr_reset(lp, sid, did);
1823
1824 }