drivers/scsi/bnx2fc/bnx2fc_io.c

   1 /* bnx2fc_io.c: QLogic Linux FCoE offload driver.
   2  * IO manager and SCSI IO processing.
   3  *
   4  * Copyright (c) 2008-2013 Broadcom Corporation
   5  * Copyright (c) 2014-2015 QLogic Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation.
  10  *
  11  * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
  12  */
  13
  14 #include "bnx2fc.h"
  15
  16 #define RESERVE_FREE_LIST_INDEX num_possible_cpus()
  17
  18 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
  19                            int bd_index);
  20 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
  21 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
  22 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
  23 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
  24 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
  25                                  struct fcoe_fcp_rsp_payload *fcp_rsp,
  26                                  u8 num_rq);
  27
  28 void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
  29                           unsigned int timer_msec)
  30 {
  31         struct bnx2fc_interface *interface = io_req->port->priv;
  32
  33         if (queue_delayed_work(interface->timer_work_queue,
  34                                &io_req->timeout_work,
  35                                msecs_to_jiffies(timer_msec)))
  36                 kref_get(&io_req->refcount);
  37 }
  38
  39 static void bnx2fc_cmd_timeout(struct work_struct *work)
  40 {
  41         struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd,
  42                                                  timeout_work.work);
  43         u8 cmd_type = io_req->cmd_type;
  44         struct bnx2fc_rport *tgt = io_req->tgt;
  45         int rc;
  46
  47         BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d,"
  48                       "req_flags = %lx\n", cmd_type, io_req->req_flags);
  49
  50         spin_lock_bh(&tgt->tgt_lock);
  51         if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) {
  52                 clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
  53                 /*
  54                  * ideally we should hold the io_req until RRQ complets,
  55                  * and release io_req from timeout hold.
  56                  */
  57                 spin_unlock_bh(&tgt->tgt_lock);
  58                 bnx2fc_send_rrq(io_req);
  59                 return;
  60         }
  61         if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) {
  62                 BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n");
  63                 goto done;
  64         }
  65
  66         switch (cmd_type) {
  67         case BNX2FC_SCSI_CMD:
  68                 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
  69                                                         &io_req->req_flags)) {
  70                         /* Handle eh_abort timeout */
  71                         BNX2FC_IO_DBG(io_req, "eh_abort timed out\n");
  72                         complete(&io_req->tm_done);
  73                 } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS,
  74                                     &io_req->req_flags)) {
  75                         /* Handle internally generated ABTS timeout */
  76                         BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n",
  77                                         io_req->refcount.refcount.counter);
  78                         if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
  79                                                &io_req->req_flags))) {
  80                                 /*
  81                                  * Cleanup and return original command to
  82                                  * mid-layer.
  83                                  */
  84                                 bnx2fc_initiate_cleanup(io_req);
  85                                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
  86                                 spin_unlock_bh(&tgt->tgt_lock);
  87
  88                                 return;
  89                         }
  90                 } else {
  91                         /* Hanlde IO timeout */
  92                         BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n");
  93                         if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL,
  94                                              &io_req->req_flags)) {
  95                                 BNX2FC_IO_DBG(io_req, "IO completed before "
  96                                                            " timer expiry\n");
  97                                 goto done;
  98                         }
  99
 100                         if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
 101                                               &io_req->req_flags)) {
 102                                 rc = bnx2fc_initiate_abts(io_req);
 103                                 if (rc == SUCCESS)
 104                                         goto done;
 105
 106                                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
 107                                 spin_unlock_bh(&tgt->tgt_lock);
 108
 109                                 return;
 110                         } else {
 111                                 BNX2FC_IO_DBG(io_req, "IO already in "
 112                                                       "ABTS processing\n");
 113                         }
 114                 }
 115                 break;
 116         case BNX2FC_ELS:
 117
 118                 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
 119                         BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n");
 120
 121                         if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
 122                                               &io_req->req_flags)) {
 123                                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
 124                                 spin_unlock_bh(&tgt->tgt_lock);
 125
 126                                 return;
 127                         }
 128                 } else {
 129                         /*
 130                          * Handle ELS timeout.
 131                          * tgt_lock is used to sync compl path and timeout
 132                          * path. If els compl path is processing this IO, we
 133                          * have nothing to do here, just release the timer hold
 134                          */
 135                         BNX2FC_IO_DBG(io_req, "ELS timed out\n");
 136                         if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,
 137                                                &io_req->req_flags))
 138                                 goto done;
 139
 140                         /* Indicate the cb_func that this ELS is timed out */
 141                         set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags);
 142
 143                         if ((io_req->cb_func) && (io_req->cb_arg)) {
 144                                 io_req->cb_func(io_req->cb_arg);
 145                                 io_req->cb_arg = NULL;
 146                         }
 147                 }
 148                 break;
 149         default:
 150                 printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n",
 151                         cmd_type);
 152                 break;
 153         }
 154
 155 done:
 156         /* release the cmd that was held when timer was set */
 157         kref_put(&io_req->refcount, bnx2fc_cmd_release);
 158         spin_unlock_bh(&tgt->tgt_lock);
 159 }
 160
 161 static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
 162 {
 163         /* Called with host lock held */
 164         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
 165
 166         /*
 167          * active_cmd_queue may have other command types as well,
 168          * and during flush operation,  we want to error back only
 169          * scsi commands.
 170          */
 171         if (io_req->cmd_type != BNX2FC_SCSI_CMD)
 172                 return;
 173
 174         BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);
 175         if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) {
 176                 /* Do not call scsi done for this IO */
 177                 return;
 178         }
 179
 180         bnx2fc_unmap_sg_list(io_req);
 181         io_req->sc_cmd = NULL;
 182
 183         /* Sanity checks before returning command to mid-layer */
 184         if (!sc_cmd) {
 185                 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
 186                                     "IO(0x%x) already cleaned up\n",
 187                        io_req->xid);
 188                 return;
 189         }
 190         if (!sc_cmd->device) {
 191                 pr_err(PFX "0x%x: sc_cmd->device is NULL.\n", io_req->xid);
 192                 return;
 193         }
 194         if (!sc_cmd->device->host) {
 195                 pr_err(PFX "0x%x: sc_cmd->device->host is NULL.\n",
 196                     io_req->xid);
 197                 return;
 198         }
 199
 200         sc_cmd->result = err_code << 16;
 201
 202         BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
 203                 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
 204                 sc_cmd->allowed);
 205         scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
 206         sc_cmd->SCp.ptr = NULL;
 207         sc_cmd->scsi_done(sc_cmd);
 208 }
 209
 210 struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba)
 211 {
 212         struct bnx2fc_cmd_mgr *cmgr;
 213         struct io_bdt *bdt_info;
 214         struct bnx2fc_cmd *io_req;
 215         size_t len;
 216         u32 mem_size;
 217         u16 xid;
 218         int i;
 219         int num_ios, num_pri_ios;
 220         size_t bd_tbl_sz;
 221         int arr_sz = num_possible_cpus() + 1;
 222         u16 min_xid = BNX2FC_MIN_XID;
 223         u16 max_xid = hba->max_xid;
 224
 225         if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
 226                 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
 227                                         and max_xid 0x%x\n", min_xid, max_xid);
 228                 return NULL;
 229         }
 230         BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
 231
 232         num_ios = max_xid - min_xid + 1;
 233         len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
 234         len += sizeof(struct bnx2fc_cmd_mgr);
 235
 236         cmgr = kzalloc(len, GFP_KERNEL);
 237         if (!cmgr) {
 238                 printk(KERN_ERR PFX "failed to alloc cmgr\n");
 239                 return NULL;
 240         }
 241
 242         cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
 243                                   arr_sz, GFP_KERNEL);
 244         if (!cmgr->free_list) {
 245                 printk(KERN_ERR PFX "failed to alloc free_list\n");
 246                 goto mem_err;
 247         }
 248
 249         cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
 250                                        arr_sz, GFP_KERNEL);
 251         if (!cmgr->free_list_lock) {
 252                 printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
 253                 kfree(cmgr->free_list);
 254                 cmgr->free_list = NULL;
 255                 goto mem_err;
 256         }
 257
 258         cmgr->hba = hba;
 259         cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
 260
 261         for (i = 0; i < arr_sz; i++)  {
 262                 INIT_LIST_HEAD(&cmgr->free_list[i]);
 263                 spin_lock_init(&cmgr->free_list_lock[i]);
 264         }
 265
 266         /*
 267          * Pre-allocated pool of bnx2fc_cmds.
 268          * Last entry in the free list array is the free list
 269          * of slow path requests.
 270          */
 271         xid = BNX2FC_MIN_XID;
 272         num_pri_ios = num_ios - hba->elstm_xids;
 273         for (i = 0; i < num_ios; i++) {
 274                 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
 275
 276                 if (!io_req) {
 277                         printk(KERN_ERR PFX "failed to alloc io_req\n");
 278                         goto mem_err;
 279                 }
 280
 281                 INIT_LIST_HEAD(&io_req->link);
 282                 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
 283
 284                 io_req->xid = xid++;
 285                 if (i < num_pri_ios)
 286                         list_add_tail(&io_req->link,
 287                                 &cmgr->free_list[io_req->xid %
 288                                                  num_possible_cpus()]);
 289                 else
 290                         list_add_tail(&io_req->link,
 291                                 &cmgr->free_list[num_possible_cpus()]);
 292                 io_req++;
 293         }
 294
 295         /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
 296         mem_size = num_ios * sizeof(struct io_bdt *);
 297         cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL);
 298         if (!cmgr->io_bdt_pool) {
 299                 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
 300                 goto mem_err;
 301         }
 302
 303         mem_size = sizeof(struct io_bdt);
 304         for (i = 0; i < num_ios; i++) {
 305                 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
 306                 if (!cmgr->io_bdt_pool[i]) {
 307                         printk(KERN_ERR PFX "failed to alloc "
 308                                 "io_bdt_pool[%d]\n", i);
 309                         goto mem_err;
 310                 }
 311         }
 312
 313         /* Allocate an map fcoe_bdt_ctx structures */
 314         bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
 315         for (i = 0; i < num_ios; i++) {
 316                 bdt_info = cmgr->io_bdt_pool[i];
 317                 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
 318                                                       bd_tbl_sz,
 319                                                       &bdt_info->bd_tbl_dma,
 320                                                       GFP_KERNEL);
 321                 if (!bdt_info->bd_tbl) {
 322                         printk(KERN_ERR PFX "failed to alloc "
 323                                 "bdt_tbl[%d]\n", i);
 324                         goto mem_err;
 325                 }
 326         }
 327
 328         return cmgr;
 329
 330 mem_err:
 331         bnx2fc_cmd_mgr_free(cmgr);
 332         return NULL;
 333 }
 334
 335 void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
 336 {
 337         struct io_bdt *bdt_info;
 338         struct bnx2fc_hba *hba = cmgr->hba;
 339         size_t bd_tbl_sz;
 340         u16 min_xid = BNX2FC_MIN_XID;
 341         u16 max_xid = hba->max_xid;
 342         int num_ios;
 343         int i;
 344
 345         num_ios = max_xid - min_xid + 1;
 346
 347         /* Free fcoe_bdt_ctx structures */
 348         if (!cmgr->io_bdt_pool)
 349                 goto free_cmd_pool;
 350
 351         bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
 352         for (i = 0; i < num_ios; i++) {
 353                 bdt_info = cmgr->io_bdt_pool[i];
 354                 if (bdt_info->bd_tbl) {
 355                         dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
 356                                             bdt_info->bd_tbl,
 357                                             bdt_info->bd_tbl_dma);
 358                         bdt_info->bd_tbl = NULL;
 359                 }
 360         }
 361
 362         /* Destroy io_bdt pool */
 363         for (i = 0; i < num_ios; i++) {
 364                 kfree(cmgr->io_bdt_pool[i]);
 365                 cmgr->io_bdt_pool[i] = NULL;
 366         }
 367
 368         kfree(cmgr->io_bdt_pool);
 369         cmgr->io_bdt_pool = NULL;
 370
 371 free_cmd_pool:
 372         kfree(cmgr->free_list_lock);
 373
 374         /* Destroy cmd pool */
 375         if (!cmgr->free_list)
 376                 goto free_cmgr;
 377
 378         for (i = 0; i < num_possible_cpus() + 1; i++)  {
 379                 struct bnx2fc_cmd *tmp, *io_req;
 380
 381                 list_for_each_entry_safe(io_req, tmp,
 382                                          &cmgr->free_list[i], link) {
 383                         list_del(&io_req->link);
 384                         kfree(io_req);
 385                 }
 386         }
 387         kfree(cmgr->free_list);
 388 free_cmgr:
 389         /* Free command manager itself */
 390         kfree(cmgr);
 391 }
 392
 393 struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
 394 {
 395         struct fcoe_port *port = tgt->port;
 396         struct bnx2fc_interface *interface = port->priv;
 397         struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
 398         struct bnx2fc_cmd *io_req;
 399         struct list_head *listp;
 400         struct io_bdt *bd_tbl;
 401         int index = RESERVE_FREE_LIST_INDEX;
 402         u32 free_sqes;
 403         u32 max_sqes;
 404         u16 xid;
 405
 406         max_sqes = tgt->max_sqes;
 407         switch (type) {
 408         case BNX2FC_TASK_MGMT_CMD:
 409                 max_sqes = BNX2FC_TM_MAX_SQES;
 410                 break;
 411         case BNX2FC_ELS:
 412                 max_sqes = BNX2FC_ELS_MAX_SQES;
 413                 break;
 414         default:
 415                 break;
 416         }
 417
 418         /*
 419          * NOTE: Free list insertions and deletions are protected with
 420          * cmgr lock
 421          */
 422         spin_lock_bh(&cmd_mgr->free_list_lock[index]);
 423         free_sqes = atomic_read(&tgt->free_sqes);
 424         if ((list_empty(&(cmd_mgr->free_list[index]))) ||
 425             (tgt->num_active_ios.counter  >= max_sqes) ||
 426             (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
 427                 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
 428                         "ios(%d):sqes(%d)\n",
 429                         tgt->num_active_ios.counter, tgt->max_sqes);
 430                 if (list_empty(&(cmd_mgr->free_list[index])))
 431                         printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
 432                 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 433                 return NULL;
 434         }
 435
 436         listp = (struct list_head *)
 437                         cmd_mgr->free_list[index].next;
 438         list_del_init(listp);
 439         io_req = (struct bnx2fc_cmd *) listp;
 440         xid = io_req->xid;
 441         cmd_mgr->cmds[xid] = io_req;
 442         atomic_inc(&tgt->num_active_ios);
 443         atomic_dec(&tgt->free_sqes);
 444         spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 445
 446         INIT_LIST_HEAD(&io_req->link);
 447
 448         io_req->port = port;
 449         io_req->cmd_mgr = cmd_mgr;
 450         io_req->req_flags = 0;
 451         io_req->cmd_type = type;
 452
 453         /* Bind io_bdt for this io_req */
 454         /* Have a static link between io_req and io_bdt_pool */
 455         bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
 456         bd_tbl->io_req = io_req;
 457
 458         /* Hold the io_req  against deletion */
 459         kref_init(&io_req->refcount);
 460         return io_req;
 461 }
 462
 463 struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
 464 {
 465         struct fcoe_port *port = tgt->port;
 466         struct bnx2fc_interface *interface = port->priv;
 467         struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
 468         struct bnx2fc_cmd *io_req;
 469         struct list_head *listp;
 470         struct io_bdt *bd_tbl;
 471         u32 free_sqes;
 472         u32 max_sqes;
 473         u16 xid;
 474         int index = get_cpu();
 475
 476         max_sqes = BNX2FC_SCSI_MAX_SQES;
 477         /*
 478          * NOTE: Free list insertions and deletions are protected with
 479          * cmgr lock
 480          */
 481         spin_lock_bh(&cmd_mgr->free_list_lock[index]);
 482         free_sqes = atomic_read(&tgt->free_sqes);
 483         if ((list_empty(&cmd_mgr->free_list[index])) ||
 484             (tgt->num_active_ios.counter  >= max_sqes) ||
 485             (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
 486                 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 487                 put_cpu();
 488                 return NULL;
 489         }
 490
 491         listp = (struct list_head *)
 492                 cmd_mgr->free_list[index].next;
 493         list_del_init(listp);
 494         io_req = (struct bnx2fc_cmd *) listp;
 495         xid = io_req->xid;
 496         cmd_mgr->cmds[xid] = io_req;
 497         atomic_inc(&tgt->num_active_ios);
 498         atomic_dec(&tgt->free_sqes);
 499         spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 500         put_cpu();
 501
 502         INIT_LIST_HEAD(&io_req->link);
 503
 504         io_req->port = port;
 505         io_req->cmd_mgr = cmd_mgr;
 506         io_req->req_flags = 0;
 507
 508         /* Bind io_bdt for this io_req */
 509         /* Have a static link between io_req and io_bdt_pool */
 510         bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
 511         bd_tbl->io_req = io_req;
 512
 513         /* Hold the io_req  against deletion */
 514         kref_init(&io_req->refcount);
 515         return io_req;
 516 }
 517
 518 void bnx2fc_cmd_release(struct kref *ref)
 519 {
 520         struct bnx2fc_cmd *io_req = container_of(ref,
 521                                                 struct bnx2fc_cmd, refcount);
 522         struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
 523         int index;
 524
 525         if (io_req->cmd_type == BNX2FC_SCSI_CMD)
 526                 index = io_req->xid % num_possible_cpus();
 527         else
 528                 index = RESERVE_FREE_LIST_INDEX;
 529
 530
 531         spin_lock_bh(&cmd_mgr->free_list_lock[index]);
 532         if (io_req->cmd_type != BNX2FC_SCSI_CMD)
 533                 bnx2fc_free_mp_resc(io_req);
 534         cmd_mgr->cmds[io_req->xid] = NULL;
 535         /* Delete IO from retire queue */
 536         list_del_init(&io_req->link);
 537         /* Add it to the free list */
 538         list_add(&io_req->link,
 539                         &cmd_mgr->free_list[index]);
 540         atomic_dec(&io_req->tgt->num_active_ios);
 541         spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 542
 543 }
 544
 545 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
 546 {
 547         struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
 548         struct bnx2fc_interface *interface = io_req->port->priv;
 549         struct bnx2fc_hba *hba = interface->hba;
 550         size_t sz = sizeof(struct fcoe_bd_ctx);
 551
 552         /* clear tm flags */
 553         mp_req->tm_flags = 0;
 554         if (mp_req->mp_req_bd) {
 555                 dma_free_coherent(&hba->pcidev->dev, sz,
 556                                      mp_req->mp_req_bd,
 557                                      mp_req->mp_req_bd_dma);
 558                 mp_req->mp_req_bd = NULL;
 559         }
 560         if (mp_req->mp_resp_bd) {
 561                 dma_free_coherent(&hba->pcidev->dev, sz,
 562                                      mp_req->mp_resp_bd,
 563                                      mp_req->mp_resp_bd_dma);
 564                 mp_req->mp_resp_bd = NULL;
 565         }
 566         if (mp_req->req_buf) {
 567                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 568                                      mp_req->req_buf,
 569                                      mp_req->req_buf_dma);
 570                 mp_req->req_buf = NULL;
 571         }
 572         if (mp_req->resp_buf) {
 573                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 574                                      mp_req->resp_buf,
 575                                      mp_req->resp_buf_dma);
 576                 mp_req->resp_buf = NULL;
 577         }
 578 }
 579
 580 int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
 581 {
 582         struct bnx2fc_mp_req *mp_req;
 583         struct fcoe_bd_ctx *mp_req_bd;
 584         struct fcoe_bd_ctx *mp_resp_bd;
 585         struct bnx2fc_interface *interface = io_req->port->priv;
 586         struct bnx2fc_hba *hba = interface->hba;
 587         dma_addr_t addr;
 588         size_t sz;
 589
 590         mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
 591         memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
 592
 593         if (io_req->cmd_type != BNX2FC_ELS) {
 594                 mp_req->req_len = sizeof(struct fcp_cmnd);
 595                 io_req->data_xfer_len = mp_req->req_len;
 596         } else
 597                 mp_req->req_len = io_req->data_xfer_len;
 598
 599         mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 600                                              &mp_req->req_buf_dma,
 601                                              GFP_ATOMIC);
 602         if (!mp_req->req_buf) {
 603                 printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
 604                 bnx2fc_free_mp_resc(io_req);
 605                 return FAILED;
 606         }
 607
 608         mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 609                                               &mp_req->resp_buf_dma,
 610                                               GFP_ATOMIC);
 611         if (!mp_req->resp_buf) {
 612                 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
 613                 bnx2fc_free_mp_resc(io_req);
 614                 return FAILED;
 615         }
 616         memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE);
 617         memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE);
 618
 619         /* Allocate and map mp_req_bd and mp_resp_bd */
 620         sz = sizeof(struct fcoe_bd_ctx);
 621         mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
 622                                                  &mp_req->mp_req_bd_dma,
 623                                                  GFP_ATOMIC);
 624         if (!mp_req->mp_req_bd) {
 625                 printk(KERN_ERR PFX "unable to alloc MP req bd\n");
 626                 bnx2fc_free_mp_resc(io_req);
 627                 return FAILED;
 628         }
 629         mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
 630                                                  &mp_req->mp_resp_bd_dma,
 631                                                  GFP_ATOMIC);
 632         if (!mp_req->mp_resp_bd) {
 633                 printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
 634                 bnx2fc_free_mp_resc(io_req);
 635                 return FAILED;
 636         }
 637         /* Fill bd table */
 638         addr = mp_req->req_buf_dma;
 639         mp_req_bd = mp_req->mp_req_bd;
 640         mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
 641         mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
 642         mp_req_bd->buf_len = CNIC_PAGE_SIZE;
 643         mp_req_bd->flags = 0;
 644
 645         /*
 646          * MP buffer is either a task mgmt command or an ELS.
 647          * So the assumption is that it consumes a single bd
 648          * entry in the bd table
 649          */
 650         mp_resp_bd = mp_req->mp_resp_bd;
 651         addr = mp_req->resp_buf_dma;
 652         mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
 653         mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
 654         mp_resp_bd->buf_len = CNIC_PAGE_SIZE;
 655         mp_resp_bd->flags = 0;
 656
 657         return SUCCESS;
 658 }
 659
 660 static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
 661 {
 662         struct fc_lport *lport;
 663         struct fc_rport *rport;
 664         struct fc_rport_libfc_priv *rp;
 665         struct fcoe_port *port;
 666         struct bnx2fc_interface *interface;
 667         struct bnx2fc_rport *tgt;
 668         struct bnx2fc_cmd *io_req;
 669         struct bnx2fc_mp_req *tm_req;
 670         struct fcoe_task_ctx_entry *task;
 671         struct fcoe_task_ctx_entry *task_page;
 672         struct Scsi_Host *host = sc_cmd->device->host;
 673         struct fc_frame_header *fc_hdr;
 674         struct fcp_cmnd *fcp_cmnd;
 675         int task_idx, index;
 676         int rc = SUCCESS;
 677         u16 xid;
 678         u32 sid, did;
 679         unsigned long start = jiffies;
 680
 681         lport = shost_priv(host);
 682         rport = starget_to_rport(scsi_target(sc_cmd->device));
 683         port = lport_priv(lport);
 684         interface = port->priv;
 685
 686         if (rport == NULL) {
 687                 printk(KERN_ERR PFX "device_reset: rport is NULL\n");
 688                 rc = FAILED;
 689                 goto tmf_err;
 690         }
 691         rp = rport->dd_data;
 692
 693         rc = fc_block_scsi_eh(sc_cmd);
 694         if (rc)
 695                 return rc;
 696
 697         if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
 698                 printk(KERN_ERR PFX "device_reset: link is not ready\n");
 699                 rc = FAILED;
 700                 goto tmf_err;
 701         }
 702         /* rport and tgt are allocated together, so tgt should be non-NULL */
 703         tgt = (struct bnx2fc_rport *)&rp[1];
 704
 705         if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
 706                 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
 707                 rc = FAILED;
 708                 goto tmf_err;
 709         }
 710 retry_tmf:
 711         io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
 712         if (!io_req) {
 713                 if (time_after(jiffies, start + HZ)) {
 714                         printk(KERN_ERR PFX "tmf: Failed TMF");
 715                         rc = FAILED;
 716                         goto tmf_err;
 717                 }
 718                 msleep(20);
 719                 goto retry_tmf;
 720         }
 721         /* Initialize rest of io_req fields */
 722         io_req->sc_cmd = sc_cmd;
 723         io_req->port = port;
 724         io_req->tgt = tgt;
 725
 726         tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
 727
 728         rc = bnx2fc_init_mp_req(io_req);
 729         if (rc == FAILED) {
 730                 printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
 731                 spin_lock_bh(&tgt->tgt_lock);
 732                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
 733                 spin_unlock_bh(&tgt->tgt_lock);
 734                 goto tmf_err;
 735         }
 736
 737         /* Set TM flags */
 738         io_req->io_req_flags = 0;
 739         tm_req->tm_flags = tm_flags;
 740
 741         /* Fill FCP_CMND */
 742         bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
 743         fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
 744         memset(fcp_cmnd->fc_cdb, 0,  sc_cmd->cmd_len);
 745         fcp_cmnd->fc_dl = 0;
 746
 747         /* Fill FC header */
 748         fc_hdr = &(tm_req->req_fc_hdr);
 749         sid = tgt->sid;
 750         did = rport->port_id;
 751         __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,
 752                            FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
 753                            FC_FC_SEQ_INIT, 0);
 754         /* Obtain exchange id */
 755         xid = io_req->xid;
 756
 757         BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
 758         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 759         index = xid % BNX2FC_TASKS_PER_PAGE;
 760
 761         /* Initialize task context for this IO request */
 762         task_page = (struct fcoe_task_ctx_entry *)
 763                         interface->hba->task_ctx[task_idx];
 764         task = &(task_page[index]);
 765         bnx2fc_init_mp_task(io_req, task);
 766
 767         sc_cmd->SCp.ptr = (char *)io_req;
 768
 769         /* Obtain free SQ entry */
 770         spin_lock_bh(&tgt->tgt_lock);
 771         bnx2fc_add_2_sq(tgt, xid);
 772
 773         /* Enqueue the io_req to active_tm_queue */
 774         io_req->on_tmf_queue = 1;
 775         list_add_tail(&io_req->link, &tgt->active_tm_queue);
 776
 777         init_completion(&io_req->tm_done);
 778         io_req->wait_for_comp = 1;
 779
 780         /* Ring doorbell */
 781         bnx2fc_ring_doorbell(tgt);
 782         spin_unlock_bh(&tgt->tgt_lock);
 783
 784         rc = wait_for_completion_timeout(&io_req->tm_done,
 785                                          interface->tm_timeout * HZ);
 786         spin_lock_bh(&tgt->tgt_lock);
 787
 788         io_req->wait_for_comp = 0;
 789         if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) {
 790                 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
 791                 if (io_req->on_tmf_queue) {
 792                         list_del_init(&io_req->link);
 793                         io_req->on_tmf_queue = 0;
 794                 }
 795                 io_req->wait_for_comp = 1;
 796                 bnx2fc_initiate_cleanup(io_req);
 797                 spin_unlock_bh(&tgt->tgt_lock);
 798                 rc = wait_for_completion_timeout(&io_req->tm_done,
 799                                                  BNX2FC_FW_TIMEOUT);
 800                 spin_lock_bh(&tgt->tgt_lock);
 801                 io_req->wait_for_comp = 0;
 802                 if (!rc)
 803                         kref_put(&io_req->refcount, bnx2fc_cmd_release);
 804         }
 805
 806         spin_unlock_bh(&tgt->tgt_lock);
 807
 808         if (!rc) {
 809                 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");
 810                 rc = FAILED;
 811         } else {
 812                 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");
 813                 rc = SUCCESS;
 814         }
 815 tmf_err:
 816         return rc;
 817 }
 818
 819 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
 820 {
 821         struct fc_lport *lport;
 822         struct bnx2fc_rport *tgt = io_req->tgt;
 823         struct fc_rport *rport = tgt->rport;
 824         struct fc_rport_priv *rdata = tgt->rdata;
 825         struct bnx2fc_interface *interface;
 826         struct fcoe_port *port;
 827         struct bnx2fc_cmd *abts_io_req;
 828         struct fcoe_task_ctx_entry *task;
 829         struct fcoe_task_ctx_entry *task_page;
 830         struct fc_frame_header *fc_hdr;
 831         struct bnx2fc_mp_req *abts_req;
 832         int task_idx, index;
 833         u32 sid, did;
 834         u16 xid;
 835         int rc = SUCCESS;
 836         u32 r_a_tov = rdata->r_a_tov;
 837
 838         /* called with tgt_lock held */
 839         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
 840
 841         port = io_req->port;
 842         interface = port->priv;
 843         lport = port->lport;
 844
 845         if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
 846                 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
 847                 rc = FAILED;
 848                 goto abts_err;
 849         }
 850
 851         if (rport == NULL) {
 852                 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");
 853                 rc = FAILED;
 854                 goto abts_err;
 855         }
 856
 857         if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
 858                 printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
 859                 rc = FAILED;
 860                 goto abts_err;
 861         }
 862
 863         abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
 864         if (!abts_io_req) {
 865                 printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
 866                 rc = FAILED;
 867                 goto abts_err;
 868         }
 869
 870         /* Initialize rest of io_req fields */
 871         abts_io_req->sc_cmd = NULL;
 872         abts_io_req->port = port;
 873         abts_io_req->tgt = tgt;
 874         abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
 875
 876         abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
 877         memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
 878
 879         /* Fill FC header */
 880         fc_hdr = &(abts_req->req_fc_hdr);
 881
 882         /* Obtain oxid and rxid for the original exchange to be aborted */
 883         fc_hdr->fh_ox_id = htons(io_req->xid);
 884         fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
 885
 886         sid = tgt->sid;
 887         did = rport->port_id;
 888
 889         __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
 890                            FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
 891                            FC_FC_SEQ_INIT, 0);
 892
 893         xid = abts_io_req->xid;
 894         BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
 895         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 896         index = xid % BNX2FC_TASKS_PER_PAGE;
 897
 898         /* Initialize task context for this IO request */
 899         task_page = (struct fcoe_task_ctx_entry *)
 900                         interface->hba->task_ctx[task_idx];
 901         task = &(task_page[index]);
 902         bnx2fc_init_mp_task(abts_io_req, task);
 903
 904         /*
 905          * ABTS task is a temporary task that will be cleaned up
 906          * irrespective of ABTS response. We need to start the timer
 907          * for the original exchange, as the CQE is posted for the original
 908          * IO request.
 909          *
 910          * Timer for ABTS is started only when it is originated by a
 911          * TM request. For the ABTS issued as part of ULP timeout,
 912          * scsi-ml maintains the timers.
 913          */
 914
 915         /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
 916         bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
 917
 918         /* Obtain free SQ entry */
 919         bnx2fc_add_2_sq(tgt, xid);
 920
 921         /* Ring doorbell */
 922         bnx2fc_ring_doorbell(tgt);
 923
 924 abts_err:
 925         return rc;
 926 }
 927
 928 int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,
 929                                 enum fc_rctl r_ctl)
 930 {
 931         struct fc_lport *lport;
 932         struct bnx2fc_rport *tgt = orig_io_req->tgt;
 933         struct bnx2fc_interface *interface;
 934         struct fcoe_port *port;
 935         struct bnx2fc_cmd *seq_clnp_req;
 936         struct fcoe_task_ctx_entry *task;
 937         struct fcoe_task_ctx_entry *task_page;
 938         struct bnx2fc_els_cb_arg *cb_arg = NULL;
 939         int task_idx, index;
 940         u16 xid;
 941         int rc = 0;
 942
 943         BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n",
 944                    orig_io_req->xid);
 945         kref_get(&orig_io_req->refcount);
 946
 947         port = orig_io_req->port;
 948         interface = port->priv;
 949         lport = port->lport;
 950
 951         cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
 952         if (!cb_arg) {
 953                 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");
 954                 rc = -ENOMEM;
 955                 goto cleanup_err;
 956         }
 957
 958         seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);
 959         if (!seq_clnp_req) {
 960                 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
 961                 rc = -ENOMEM;
 962                 kfree(cb_arg);
 963                 goto cleanup_err;
 964         }
 965         /* Initialize rest of io_req fields */
 966         seq_clnp_req->sc_cmd = NULL;
 967         seq_clnp_req->port = port;
 968         seq_clnp_req->tgt = tgt;
 969         seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */
 970
 971         xid = seq_clnp_req->xid;
 972
 973         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 974         index = xid % BNX2FC_TASKS_PER_PAGE;
 975
 976         /* Initialize task context for this IO request */
 977         task_page = (struct fcoe_task_ctx_entry *)
 978                      interface->hba->task_ctx[task_idx];
 979         task = &(task_page[index]);
 980         cb_arg->aborted_io_req = orig_io_req;
 981         cb_arg->io_req = seq_clnp_req;
 982         cb_arg->r_ctl = r_ctl;
 983         cb_arg->offset = offset;
 984         seq_clnp_req->cb_arg = cb_arg;
 985
 986         printk(KERN_ERR PFX "call init_seq_cleanup_task\n");
 987         bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);
 988
 989         /* Obtain free SQ entry */
 990         bnx2fc_add_2_sq(tgt, xid);
 991
 992         /* Ring doorbell */
 993         bnx2fc_ring_doorbell(tgt);
 994 cleanup_err:
 995         return rc;
 996 }
 997
 998 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
 999 {
1000         struct fc_lport *lport;
1001         struct bnx2fc_rport *tgt = io_req->tgt;
1002         struct bnx2fc_interface *interface;
1003         struct fcoe_port *port;
1004         struct bnx2fc_cmd *cleanup_io_req;
1005         struct fcoe_task_ctx_entry *task;
1006         struct fcoe_task_ctx_entry *task_page;
1007         int task_idx, index;
1008         u16 xid, orig_xid;
1009         int rc = 0;
1010
1011         /* ASSUMPTION: called with tgt_lock held */
1012         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
1013
1014         port = io_req->port;
1015         interface = port->priv;
1016         lport = port->lport;
1017
1018         cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
1019         if (!cleanup_io_req) {
1020                 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
1021                 rc = -1;
1022                 goto cleanup_err;
1023         }
1024
1025         /* Initialize rest of io_req fields */
1026         cleanup_io_req->sc_cmd = NULL;
1027         cleanup_io_req->port = port;
1028         cleanup_io_req->tgt = tgt;
1029         cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
1030
1031         xid = cleanup_io_req->xid;
1032
1033         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1034         index = xid % BNX2FC_TASKS_PER_PAGE;
1035
1036         /* Initialize task context for this IO request */
1037         task_page = (struct fcoe_task_ctx_entry *)
1038                         interface->hba->task_ctx[task_idx];
1039         task = &(task_page[index]);
1040         orig_xid = io_req->xid;
1041
1042         BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
1043
1044         bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
1045
1046         /* Obtain free SQ entry */
1047         bnx2fc_add_2_sq(tgt, xid);
1048
1049         /* Ring doorbell */
1050         bnx2fc_ring_doorbell(tgt);
1051
1052 cleanup_err:
1053         return rc;
1054 }
1055
1056 /**
1057  * bnx2fc_eh_target_reset: Reset a target
1058  *
1059  * @sc_cmd:     SCSI command
1060  *
1061  * Set from SCSI host template to send task mgmt command to the target
1062  *      and wait for the response
1063  */
1064 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
1065 {
1066         return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
1067 }
1068
1069 /**
1070  * bnx2fc_eh_device_reset - Reset a single LUN
1071  *
1072  * @sc_cmd:     SCSI command
1073  *
1074  * Set from SCSI host template to send task mgmt command to the target
1075  *      and wait for the response
1076  */
1077 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1078 {
1079         return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1080 }
1081
1082 int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)
1083 {
1084         struct bnx2fc_rport *tgt = io_req->tgt;
1085         int rc = SUCCESS;
1086
1087         io_req->wait_for_comp = 1;
1088         bnx2fc_initiate_cleanup(io_req);
1089
1090         spin_unlock_bh(&tgt->tgt_lock);
1091
1092         wait_for_completion(&io_req->tm_done);
1093
1094         io_req->wait_for_comp = 0;
1095         /*
1096          * release the reference taken in eh_abort to allow the
1097          * target to re-login after flushing IOs
1098          */
1099         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1100
1101         spin_lock_bh(&tgt->tgt_lock);
1102         return rc;
1103 }
1104 /**
1105  * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1106  *                      SCSI command
1107  *
1108  * @sc_cmd:     SCSI_ML command pointer
1109  *
1110  * SCSI abort request handler
1111  */
1112 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1113 {
1114         struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1115         struct fc_rport_libfc_priv *rp = rport->dd_data;
1116         struct bnx2fc_cmd *io_req;
1117         struct fc_lport *lport;
1118         struct bnx2fc_rport *tgt;
1119         int rc;
1120
1121         rc = fc_block_scsi_eh(sc_cmd);
1122         if (rc)
1123                 return rc;
1124
1125         lport = shost_priv(sc_cmd->device->host);
1126         if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1127                 printk(KERN_ERR PFX "eh_abort: link not ready\n");
1128                 return FAILED;
1129         }
1130
1131         tgt = (struct bnx2fc_rport *)&rp[1];
1132
1133         BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1134
1135         spin_lock_bh(&tgt->tgt_lock);
1136         io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
1137         if (!io_req) {
1138                 /* Command might have just completed */
1139                 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1140                 spin_unlock_bh(&tgt->tgt_lock);
1141                 return SUCCESS;
1142         }
1143         BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
1144                       io_req->refcount.refcount.counter);
1145
1146         /* Hold IO request across abort processing */
1147         kref_get(&io_req->refcount);
1148
1149         BUG_ON(tgt != io_req->tgt);
1150
1151         /* Remove the io_req from the active_q. */
1152         /*
1153          * Task Mgmt functions (LUN RESET & TGT RESET) will not
1154          * issue an ABTS on this particular IO req, as the
1155          * io_req is no longer in the active_q.
1156          */
1157         if (tgt->flush_in_prog) {
1158                 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1159                         "flush in progress\n", io_req->xid);
1160                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1161                 spin_unlock_bh(&tgt->tgt_lock);
1162                 return SUCCESS;
1163         }
1164
1165         if (io_req->on_active_queue == 0) {
1166                 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1167                                 "not on active_q\n", io_req->xid);
1168                 /*
1169                  * This condition can happen only due to the FW bug,
1170                  * where we do not receive cleanup response from
1171                  * the FW. Handle this case gracefully by erroring
1172                  * back the IO request to SCSI-ml
1173                  */
1174                 bnx2fc_scsi_done(io_req, DID_ABORT);
1175
1176                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1177                 spin_unlock_bh(&tgt->tgt_lock);
1178                 return SUCCESS;
1179         }
1180
1181         /*
1182          * Only eh_abort processing will remove the IO from
1183          * active_cmd_q before processing the request. this is
1184          * done to avoid race conditions between IOs aborted
1185          * as part of task management completion and eh_abort
1186          * processing
1187          */
1188         list_del_init(&io_req->link);
1189         io_req->on_active_queue = 0;
1190         /* Move IO req to retire queue */
1191         list_add_tail(&io_req->link, &tgt->io_retire_queue);
1192
1193         init_completion(&io_req->tm_done);
1194
1195         if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
1196                 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1197                                 "already in abts processing\n", io_req->xid);
1198                 if (cancel_delayed_work(&io_req->timeout_work))
1199                         kref_put(&io_req->refcount,
1200                                  bnx2fc_cmd_release); /* drop timer hold */
1201                 rc = bnx2fc_abts_cleanup(io_req);
1202                 /* This only occurs when an task abort was requested while ABTS
1203                    is in progress.  Setting the IO_CLEANUP flag will skip the
1204                    RRQ process in the case when the fw generated SCSI_CMD cmpl
1205                    was a result from the ABTS request rather than the CLEANUP
1206                    request */
1207                 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
1208                 goto out;
1209         }
1210
1211         /* Cancel the current timer running on this io_req */
1212         if (cancel_delayed_work(&io_req->timeout_work))
1213                 kref_put(&io_req->refcount,
1214                          bnx2fc_cmd_release); /* drop timer hold */
1215         set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
1216         io_req->wait_for_comp = 1;
1217         rc = bnx2fc_initiate_abts(io_req);
1218         if (rc == FAILED) {
1219                 bnx2fc_initiate_cleanup(io_req);
1220                 spin_unlock_bh(&tgt->tgt_lock);
1221                 wait_for_completion(&io_req->tm_done);
1222                 spin_lock_bh(&tgt->tgt_lock);
1223                 io_req->wait_for_comp = 0;
1224                 goto done;
1225         }
1226         spin_unlock_bh(&tgt->tgt_lock);
1227
1228         wait_for_completion(&io_req->tm_done);
1229
1230         spin_lock_bh(&tgt->tgt_lock);
1231         io_req->wait_for_comp = 0;
1232         if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1233                 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n");
1234                 rc = SUCCESS;
1235         } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1236                                       &io_req->req_flags))) {
1237                 /* Let the scsi-ml try to recover this command */
1238                 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1239                        io_req->xid);
1240                 rc = bnx2fc_abts_cleanup(io_req);
1241                 goto out;
1242         } else {
1243                 /*
1244                  * We come here even when there was a race condition
1245                  * between timeout and abts completion, and abts
1246                  * completion happens just in time.
1247                  */
1248                 BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1249                 rc = SUCCESS;
1250                 bnx2fc_scsi_done(io_req, DID_ABORT);
1251                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1252         }
1253 done:
1254         /* release the reference taken in eh_abort */
1255         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1256 out:
1257         spin_unlock_bh(&tgt->tgt_lock);
1258         return rc;
1259 }
1260
1261 void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,
1262                                       struct fcoe_task_ctx_entry *task,
1263                                       u8 rx_state)
1264 {
1265         struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;
1266         struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;
1267         u32 offset = cb_arg->offset;
1268         enum fc_rctl r_ctl = cb_arg->r_ctl;
1269         int rc = 0;
1270         struct bnx2fc_rport *tgt = orig_io_req->tgt;
1271
1272         BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"
1273                               "cmd_type = %d\n",
1274                    seq_clnp_req->xid, seq_clnp_req->cmd_type);
1275
1276         if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {
1277                 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",
1278                         seq_clnp_req->xid);
1279                 goto free_cb_arg;
1280         }
1281
1282         spin_unlock_bh(&tgt->tgt_lock);
1283         rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
1284         spin_lock_bh(&tgt->tgt_lock);
1285
1286         if (rc)
1287                 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"
1288                         " IO will abort\n");
1289         seq_clnp_req->cb_arg = NULL;
1290         kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
1291 free_cb_arg:
1292         kfree(cb_arg);
1293         return;
1294 }
1295
1296 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1297                                   struct fcoe_task_ctx_entry *task,
1298                                   u8 num_rq)
1299 {
1300         BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1301                               "refcnt = %d, cmd_type = %d\n",
1302                    io_req->refcount.refcount.counter, io_req->cmd_type);
1303         bnx2fc_scsi_done(io_req, DID_ERROR);
1304         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1305         if (io_req->wait_for_comp)
1306                 complete(&io_req->tm_done);
1307 }
1308
1309 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1310                                struct fcoe_task_ctx_entry *task,
1311                                u8 num_rq)
1312 {
1313         u32 r_ctl;
1314         u32 r_a_tov = FC_DEF_R_A_TOV;
1315         u8 issue_rrq = 0;
1316         struct bnx2fc_rport *tgt = io_req->tgt;
1317
1318         BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1319                               "refcnt = %d, cmd_type = %d\n",
1320                    io_req->xid,
1321                    io_req->refcount.refcount.counter, io_req->cmd_type);
1322
1323         if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1324                                        &io_req->req_flags)) {
1325                 BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1326                                 " this io\n");
1327                 return;
1328         }
1329
1330         /* Do not issue RRQ as this IO is already cleanedup */
1331         if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1332                                 &io_req->req_flags))
1333                 goto io_compl;
1334
1335         /*
1336          * For ABTS issued due to SCSI eh_abort_handler, timeout
1337          * values are maintained by scsi-ml itself. Cancel timeout
1338          * in case ABTS issued as part of task management function
1339          * or due to FW error.
1340          */
1341         if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1342                 if (cancel_delayed_work(&io_req->timeout_work))
1343                         kref_put(&io_req->refcount,
1344                                  bnx2fc_cmd_release); /* drop timer hold */
1345
1346         r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
1347
1348         switch (r_ctl) {
1349         case FC_RCTL_BA_ACC:
1350                 /*
1351                  * Dont release this cmd yet. It will be relesed
1352                  * after we get RRQ response
1353                  */
1354                 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1355                 issue_rrq = 1;
1356                 break;
1357
1358         case FC_RCTL_BA_RJT:
1359                 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1360                 break;
1361         default:
1362                 printk(KERN_ERR PFX "Unknown ABTS response\n");
1363                 break;
1364         }
1365
1366         if (issue_rrq) {
1367                 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1368                 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1369         }
1370         set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1371         bnx2fc_cmd_timer_set(io_req, r_a_tov);
1372
1373 io_compl:
1374         if (io_req->wait_for_comp) {
1375                 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1376                                        &io_req->req_flags))
1377                         complete(&io_req->tm_done);
1378         } else {
1379                 /*
1380                  * We end up here when ABTS is issued as
1381                  * in asynchronous context, i.e., as part
1382                  * of task management completion, or
1383                  * when FW error is received or when the
1384                  * ABTS is issued when the IO is timed
1385                  * out.
1386                  */
1387
1388                 if (io_req->on_active_queue) {
1389                         list_del_init(&io_req->link);
1390                         io_req->on_active_queue = 0;
1391                         /* Move IO req to retire queue */
1392                         list_add_tail(&io_req->link, &tgt->io_retire_queue);
1393                 }
1394                 bnx2fc_scsi_done(io_req, DID_ERROR);
1395                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1396         }
1397 }
1398
1399 static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1400 {
1401         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1402         struct bnx2fc_rport *tgt = io_req->tgt;
1403         struct bnx2fc_cmd *cmd, *tmp;
1404         u64 tm_lun = sc_cmd->device->lun;
1405         u64 lun;
1406         int rc = 0;
1407
1408         /* called with tgt_lock held */
1409         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1410         /*
1411          * Walk thru the active_ios queue and ABORT the IO
1412          * that matches with the LUN that was reset
1413          */
1414         list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1415                 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
1416                 lun = cmd->sc_cmd->device->lun;
1417                 if (lun == tm_lun) {
1418                         /* Initiate ABTS on this cmd */
1419                         if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1420                                               &cmd->req_flags)) {
1421                                 /* cancel the IO timeout */
1422                                 if (cancel_delayed_work(&io_req->timeout_work))
1423                                         kref_put(&io_req->refcount,
1424                                                  bnx2fc_cmd_release);
1425                                                         /* timer hold */
1426                                 rc = bnx2fc_initiate_abts(cmd);
1427                                 /* abts shouldn't fail in this context */
1428                                 WARN_ON(rc != SUCCESS);
1429                         } else
1430                                 printk(KERN_ERR PFX "lun_rst: abts already in"
1431                                         " progress for this IO 0x%x\n",
1432                                         cmd->xid);
1433                 }
1434         }
1435 }
1436
1437 static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1438 {
1439         struct bnx2fc_rport *tgt = io_req->tgt;
1440         struct bnx2fc_cmd *cmd, *tmp;
1441         int rc = 0;
1442
1443         /* called with tgt_lock held */
1444         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1445         /*
1446          * Walk thru the active_ios queue and ABORT the IO
1447          * that matches with the LUN that was reset
1448          */
1449         list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1450                 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
1451                 /* Initiate ABTS */
1452                 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1453                                                         &cmd->req_flags)) {
1454                         /* cancel the IO timeout */
1455                         if (cancel_delayed_work(&io_req->timeout_work))
1456                                 kref_put(&io_req->refcount,
1457                                          bnx2fc_cmd_release); /* timer hold */
1458                         rc = bnx2fc_initiate_abts(cmd);
1459                         /* abts shouldn't fail in this context */
1460                         WARN_ON(rc != SUCCESS);
1461
1462                 } else
1463                         printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1464                                 " for this IO 0x%x\n", cmd->xid);
1465         }
1466 }
1467
1468 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
1469                              struct fcoe_task_ctx_entry *task, u8 num_rq)
1470 {
1471         struct bnx2fc_mp_req *tm_req;
1472         struct fc_frame_header *fc_hdr;
1473         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1474         u64 *hdr;
1475         u64 *temp_hdr;
1476         void *rsp_buf;
1477
1478         /* Called with tgt_lock held */
1479         BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1480
1481         if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1482                 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1483         else {
1484                 /* TM has already timed out and we got
1485                  * delayed completion. Ignore completion
1486                  * processing.
1487                  */
1488                 return;
1489         }
1490
1491         tm_req = &(io_req->mp_req);
1492         fc_hdr = &(tm_req->resp_fc_hdr);
1493         hdr = (u64 *)fc_hdr;
1494         temp_hdr = (u64 *)
1495                 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
1496         hdr[0] = cpu_to_be64(temp_hdr[0]);
1497         hdr[1] = cpu_to_be64(temp_hdr[1]);
1498         hdr[2] = cpu_to_be64(temp_hdr[2]);
1499
1500         tm_req->resp_len =
1501                 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
1502
1503         rsp_buf = tm_req->resp_buf;
1504
1505         if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1506                 bnx2fc_parse_fcp_rsp(io_req,
1507                                      (struct fcoe_fcp_rsp_payload *)
1508                                      rsp_buf, num_rq);
1509                 if (io_req->fcp_rsp_code == 0) {
1510                         /* TM successful */
1511                         if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1512                                 bnx2fc_lun_reset_cmpl(io_req);
1513                         else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1514                                 bnx2fc_tgt_reset_cmpl(io_req);
1515                 }
1516         } else {
1517                 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1518                         fc_hdr->fh_r_ctl);
1519         }
1520         if (!sc_cmd->SCp.ptr) {
1521                 printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n");
1522                 return;
1523         }
1524         switch (io_req->fcp_status) {
1525         case FC_GOOD:
1526                 if (io_req->cdb_status == 0) {
1527                         /* Good IO completion */
1528                         sc_cmd->result = DID_OK << 16;
1529                 } else {
1530                         /* Transport status is good, SCSI status not good */
1531                         sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1532                 }
1533                 if (io_req->fcp_resid)
1534                         scsi_set_resid(sc_cmd, io_req->fcp_resid);
1535                 break;
1536
1537         default:
1538                 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1539                            io_req->fcp_status);
1540                 break;
1541         }
1542
1543         sc_cmd = io_req->sc_cmd;
1544         io_req->sc_cmd = NULL;
1545
1546         /* check if the io_req exists in tgt's tmf_q */
1547         if (io_req->on_tmf_queue) {
1548
1549                 list_del_init(&io_req->link);
1550                 io_req->on_tmf_queue = 0;
1551         } else {
1552
1553                 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");
1554                 return;
1555         }
1556
1557         sc_cmd->SCp.ptr = NULL;
1558         sc_cmd->scsi_done(sc_cmd);
1559
1560         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1561         if (io_req->wait_for_comp) {
1562                 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
1563                 complete(&io_req->tm_done);
1564         }
1565 }
1566
1567 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1568                            int bd_index)
1569 {
1570         struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1571         int frag_size, sg_frags;
1572
1573         sg_frags = 0;
1574         while (sg_len) {
1575                 if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1576                         frag_size = BNX2FC_BD_SPLIT_SZ;
1577                 else
1578                         frag_size = sg_len;
1579                 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1580                 bd[bd_index + sg_frags].buf_addr_hi  = addr >> 32;
1581                 bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1582                 bd[bd_index + sg_frags].flags = 0;
1583
1584                 addr += (u64) frag_size;
1585                 sg_frags++;
1586                 sg_len -= frag_size;
1587         }
1588         return sg_frags;
1589
1590 }
1591
1592 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1593 {
1594         struct bnx2fc_interface *interface = io_req->port->priv;
1595         struct bnx2fc_hba *hba = interface->hba;
1596         struct scsi_cmnd *sc = io_req->sc_cmd;
1597         struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1598         struct scatterlist *sg;
1599         int byte_count = 0;
1600         int sg_count = 0;
1601         int bd_count = 0;
1602         int sg_frags;
1603         unsigned int sg_len;
1604         u64 addr;
1605         int i;
1606
1607         /*
1608          * Use dma_map_sg directly to ensure we're using the correct
1609          * dev struct off of pcidev.
1610          */
1611         sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),
1612                               scsi_sg_count(sc), sc->sc_data_direction);
1613         scsi_for_each_sg(sc, sg, sg_count, i) {
1614                 sg_len = sg_dma_len(sg);
1615                 addr = sg_dma_address(sg);
1616                 if (sg_len > BNX2FC_MAX_BD_LEN) {
1617                         sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1618                                                    bd_count);
1619                 } else {
1620
1621                         sg_frags = 1;
1622                         bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1623                         bd[bd_count].buf_addr_hi  = addr >> 32;
1624                         bd[bd_count].buf_len = (u16)sg_len;
1625                         bd[bd_count].flags = 0;
1626                 }
1627                 bd_count += sg_frags;
1628                 byte_count += sg_len;
1629         }
1630         if (byte_count != scsi_bufflen(sc))
1631                 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1632                         "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1633                         io_req->xid);
1634         return bd_count;
1635 }
1636
1637 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
1638 {
1639         struct scsi_cmnd *sc = io_req->sc_cmd;
1640         struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1641         int bd_count;
1642
1643         if (scsi_sg_count(sc)) {
1644                 bd_count = bnx2fc_map_sg(io_req);
1645                 if (bd_count == 0)
1646                         return -ENOMEM;
1647         } else {
1648                 bd_count = 0;
1649                 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1650                 bd[0].buf_len = bd[0].flags = 0;
1651         }
1652         io_req->bd_tbl->bd_valid = bd_count;
1653
1654         return 0;
1655 }
1656
1657 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1658 {
1659         struct scsi_cmnd *sc = io_req->sc_cmd;
1660         struct bnx2fc_interface *interface = io_req->port->priv;
1661         struct bnx2fc_hba *hba = interface->hba;
1662
1663         /*
1664          * Use dma_unmap_sg directly to ensure we're using the correct
1665          * dev struct off of pcidev.
1666          */
1667         if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
1668                 dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc),
1669                     scsi_sg_count(sc), sc->sc_data_direction);
1670                 io_req->bd_tbl->bd_valid = 0;
1671         }
1672 }
1673
1674 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1675                                   struct fcp_cmnd *fcp_cmnd)
1676 {
1677         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1678
1679         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1680
1681         int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun);
1682
1683         fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1684         memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1685
1686         fcp_cmnd->fc_cmdref = 0;
1687         fcp_cmnd->fc_pri_ta = 0;
1688         fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1689         fcp_cmnd->fc_flags = io_req->io_req_flags;
1690         fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
1691 }
1692
1693 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1694                                  struct fcoe_fcp_rsp_payload *fcp_rsp,
1695                                  u8 num_rq)
1696 {
1697         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1698         struct bnx2fc_rport *tgt = io_req->tgt;
1699         u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1700         u32 rq_buff_len = 0;
1701         int i;
1702         unsigned char *rq_data;
1703         unsigned char *dummy;
1704         int fcp_sns_len = 0;
1705         int fcp_rsp_len = 0;
1706
1707         io_req->fcp_status = FC_GOOD;
1708         io_req->fcp_resid = 0;
1709         if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |
1710             FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))
1711                 io_req->fcp_resid = fcp_rsp->fcp_resid;
1712
1713         io_req->scsi_comp_flags = rsp_flags;
1714         CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
1715                                 fcp_rsp->scsi_status_code;
1716
1717         /* Fetch fcp_rsp_info and fcp_sns_info if available */
1718         if (num_rq) {
1719
1720                 /*
1721                  * We do not anticipate num_rq >1, as the linux defined
1722                  * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1723                  * 256 bytes of single rq buffer is good enough to hold this.
1724                  */
1725
1726                 if (rsp_flags &
1727                     FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1728                         fcp_rsp_len = rq_buff_len
1729                                         = fcp_rsp->fcp_rsp_len;
1730                 }
1731
1732                 if (rsp_flags &
1733                     FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1734                         fcp_sns_len = fcp_rsp->fcp_sns_len;
1735                         rq_buff_len += fcp_rsp->fcp_sns_len;
1736                 }
1737
1738                 io_req->fcp_rsp_len = fcp_rsp_len;
1739                 io_req->fcp_sns_len = fcp_sns_len;
1740
1741                 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1742                         /* Invalid sense sense length. */
1743                         printk(KERN_ERR PFX "invalid sns length %d\n",
1744                                 rq_buff_len);
1745                         /* reset rq_buff_len */
1746                         rq_buff_len =  num_rq * BNX2FC_RQ_BUF_SZ;
1747                 }
1748
1749                 rq_data = bnx2fc_get_next_rqe(tgt, 1);
1750
1751                 if (num_rq > 1) {
1752                         /* We do not need extra sense data */
1753                         for (i = 1; i < num_rq; i++)
1754                                 dummy = bnx2fc_get_next_rqe(tgt, 1);
1755                 }
1756
1757                 /* fetch fcp_rsp_code */
1758                 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1759                         /* Only for task management function */
1760                         io_req->fcp_rsp_code = rq_data[3];
1761                         BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n",
1762                                 io_req->fcp_rsp_code);
1763                 }
1764
1765                 /* fetch sense data */
1766                 rq_data += fcp_rsp_len;
1767
1768                 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
1769                         printk(KERN_ERR PFX "Truncating sense buffer\n");
1770                         fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
1771                 }
1772
1773                 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1774                 if (fcp_sns_len)
1775                         memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
1776
1777                 /* return RQ entries */
1778                 for (i = 0; i < num_rq; i++)
1779                         bnx2fc_return_rqe(tgt, 1);
1780         }
1781 }
1782
1783 /**
1784  * bnx2fc_queuecommand - Queuecommand function of the scsi template
1785  *
1786  * @host:       The Scsi_Host the command was issued to
1787  * @sc_cmd:     struct scsi_cmnd to be executed
1788  *
1789  * This is the IO strategy routine, called by SCSI-ML
1790  **/
1791 int bnx2fc_queuecommand(struct Scsi_Host *host,
1792                         struct scsi_cmnd *sc_cmd)
1793 {
1794         struct fc_lport *lport = shost_priv(host);
1795         struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1796         struct fc_rport_libfc_priv *rp = rport->dd_data;
1797         struct bnx2fc_rport *tgt;
1798         struct bnx2fc_cmd *io_req;
1799         int rc = 0;
1800         int rval;
1801
1802         rval = fc_remote_port_chkready(rport);
1803         if (rval) {
1804                 sc_cmd->result = rval;
1805                 sc_cmd->scsi_done(sc_cmd);
1806                 return 0;
1807         }
1808
1809         if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1810                 rc = SCSI_MLQUEUE_HOST_BUSY;
1811                 goto exit_qcmd;
1812         }
1813
1814         /* rport and tgt are allocated together, so tgt should be non-NULL */
1815         tgt = (struct bnx2fc_rport *)&rp[1];
1816
1817         if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1818                 /*
1819                  * Session is not offloaded yet. Let SCSI-ml retry
1820                  * the command.
1821                  */
1822                 rc = SCSI_MLQUEUE_TARGET_BUSY;
1823                 goto exit_qcmd;
1824         }
1825         if (tgt->retry_delay_timestamp) {
1826                 if (time_after(jiffies, tgt->retry_delay_timestamp)) {
1827                         tgt->retry_delay_timestamp = 0;
1828                 } else {
1829                         /* If retry_delay timer is active, flow off the ML */
1830                         rc = SCSI_MLQUEUE_TARGET_BUSY;
1831                         goto exit_qcmd;
1832                 }
1833         }
1834
1835         spin_lock_bh(&tgt->tgt_lock);
1836
1837         io_req = bnx2fc_cmd_alloc(tgt);
1838         if (!io_req) {
1839                 rc = SCSI_MLQUEUE_HOST_BUSY;
1840                 goto exit_qcmd_tgtlock;
1841         }
1842         io_req->sc_cmd = sc_cmd;
1843
1844         if (bnx2fc_post_io_req(tgt, io_req)) {
1845                 printk(KERN_ERR PFX "Unable to post io_req\n");
1846                 rc = SCSI_MLQUEUE_HOST_BUSY;
1847                 goto exit_qcmd_tgtlock;
1848         }
1849
1850 exit_qcmd_tgtlock:
1851         spin_unlock_bh(&tgt->tgt_lock);
1852 exit_qcmd:
1853         return rc;
1854 }
1855
1856 void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
1857                                    struct fcoe_task_ctx_entry *task,
1858                                    u8 num_rq)
1859 {
1860         struct fcoe_fcp_rsp_payload *fcp_rsp;
1861         struct bnx2fc_rport *tgt = io_req->tgt;
1862         struct scsi_cmnd *sc_cmd;
1863         struct Scsi_Host *host;
1864
1865
1866         /* scsi_cmd_cmpl is called with tgt lock held */
1867
1868         if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1869                 /* we will not receive ABTS response for this IO */
1870                 BNX2FC_IO_DBG(io_req, "Timer context finished processing "
1871                            "this scsi cmd\n");
1872         }
1873
1874         /* Cancel the timeout_work, as we received IO completion */
1875         if (cancel_delayed_work(&io_req->timeout_work))
1876                 kref_put(&io_req->refcount,
1877                          bnx2fc_cmd_release); /* drop timer hold */
1878
1879         sc_cmd = io_req->sc_cmd;
1880         if (sc_cmd == NULL) {
1881                 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
1882                 return;
1883         }
1884
1885         /* Fetch fcp_rsp from task context and perform cmd completion */
1886         fcp_rsp = (struct fcoe_fcp_rsp_payload *)
1887                    &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);
1888
1889         /* parse fcp_rsp and obtain sense data from RQ if available */
1890         bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq);
1891
1892         host = sc_cmd->device->host;
1893         if (!sc_cmd->SCp.ptr) {
1894                 printk(KERN_ERR PFX "SCp.ptr is NULL\n");
1895                 return;
1896         }
1897
1898         if (io_req->on_active_queue) {
1899                 list_del_init(&io_req->link);
1900                 io_req->on_active_queue = 0;
1901                 /* Move IO req to retire queue */
1902                 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1903         } else {
1904                 /* This should not happen, but could have been pulled
1905                  * by bnx2fc_flush_active_ios(), or during a race
1906                  * between command abort and (late) completion.
1907                  */
1908                 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
1909                 if (io_req->wait_for_comp)
1910                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1911                                                &io_req->req_flags))
1912                                 complete(&io_req->tm_done);
1913         }
1914
1915         bnx2fc_unmap_sg_list(io_req);
1916         io_req->sc_cmd = NULL;
1917
1918         switch (io_req->fcp_status) {
1919         case FC_GOOD:
1920                 if (io_req->cdb_status == 0) {
1921                         /* Good IO completion */
1922                         sc_cmd->result = DID_OK << 16;
1923                 } else {
1924                         /* Transport status is good, SCSI status not good */
1925                         BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
1926                                  " fcp_resid = 0x%x\n",
1927                                 io_req->cdb_status, io_req->fcp_resid);
1928                         sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1929
1930                         if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||
1931                             io_req->cdb_status == SAM_STAT_BUSY) {
1932                                 /* Set the jiffies + retry_delay_timer * 100ms
1933                                    for the rport/tgt */
1934                                 tgt->retry_delay_timestamp = jiffies +
1935                                         fcp_rsp->retry_delay_timer * HZ / 10;
1936                         }
1937
1938                 }
1939                 if (io_req->fcp_resid)
1940                         scsi_set_resid(sc_cmd, io_req->fcp_resid);
1941                 break;
1942         default:
1943                 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n",
1944                         io_req->fcp_status);
1945                 break;
1946         }
1947         sc_cmd->SCp.ptr = NULL;
1948         sc_cmd->scsi_done(sc_cmd);
1949         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1950 }
1951
1952 int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
1953                                struct bnx2fc_cmd *io_req)
1954 {
1955         struct fcoe_task_ctx_entry *task;
1956         struct fcoe_task_ctx_entry *task_page;
1957         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1958         struct fcoe_port *port = tgt->port;
1959         struct bnx2fc_interface *interface = port->priv;
1960         struct bnx2fc_hba *hba = interface->hba;
1961         struct fc_lport *lport = port->lport;
1962         struct fc_stats *stats;
1963         int task_idx, index;
1964         u16 xid;
1965
1966         /* bnx2fc_post_io_req() is called with the tgt_lock held */
1967
1968         /* Initialize rest of io_req fields */
1969         io_req->cmd_type = BNX2FC_SCSI_CMD;
1970         io_req->port = port;
1971         io_req->tgt = tgt;
1972         io_req->data_xfer_len = scsi_bufflen(sc_cmd);
1973         sc_cmd->SCp.ptr = (char *)io_req;
1974
1975         stats = per_cpu_ptr(lport->stats, get_cpu());
1976         if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
1977                 io_req->io_req_flags = BNX2FC_READ;
1978                 stats->InputRequests++;
1979                 stats->InputBytes += io_req->data_xfer_len;
1980         } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
1981                 io_req->io_req_flags = BNX2FC_WRITE;
1982                 stats->OutputRequests++;
1983                 stats->OutputBytes += io_req->data_xfer_len;
1984         } else {
1985                 io_req->io_req_flags = 0;
1986                 stats->ControlRequests++;
1987         }
1988         put_cpu();
1989
1990         xid = io_req->xid;
1991
1992         /* Build buffer descriptor list for firmware from sg list */
1993         if (bnx2fc_build_bd_list_from_sg(io_req)) {
1994                 printk(KERN_ERR PFX "BD list creation failed\n");
1995                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1996                 return -EAGAIN;
1997         }
1998
1999         task_idx = xid / BNX2FC_TASKS_PER_PAGE;
2000         index = xid % BNX2FC_TASKS_PER_PAGE;
2001
2002         /* Initialize task context for this IO request */
2003         task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
2004         task = &(task_page[index]);
2005         bnx2fc_init_task(io_req, task);
2006
2007         if (tgt->flush_in_prog) {
2008                 printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
2009                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2010                 return -EAGAIN;
2011         }
2012
2013         if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
2014                 printk(KERN_ERR PFX "Session not ready...post_io\n");
2015                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2016                 return -EAGAIN;
2017         }
2018
2019         /* Time IO req */
2020         if (tgt->io_timeout)
2021                 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
2022         /* Obtain free SQ entry */
2023         bnx2fc_add_2_sq(tgt, xid);
2024
2025         /* Enqueue the io_req to active_cmd_queue */
2026
2027         io_req->on_active_queue = 1;
2028         /* move io_req from pending_queue to active_queue */
2029         list_add_tail(&io_req->link, &tgt->active_cmd_queue);
2030
2031         /* Ring doorbell */
2032         bnx2fc_ring_doorbell(tgt);
2033         return 0;
2034 }