kernel/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         if (!sc_cmd) {
 183                 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
 184                                     "IO(0x%x) already cleaned up\n",
 185                        io_req->xid);
 186                 return;
 187         }
 188         sc_cmd->result = err_code << 16;
 189
 190         BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
 191                 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
 192                 sc_cmd->allowed);
 193         scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
 194         sc_cmd->SCp.ptr = NULL;
 195         sc_cmd->scsi_done(sc_cmd);
 196 }
 197
 198 struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba)
 199 {
 200         struct bnx2fc_cmd_mgr *cmgr;
 201         struct io_bdt *bdt_info;
 202         struct bnx2fc_cmd *io_req;
 203         size_t len;
 204         u32 mem_size;
 205         u16 xid;
 206         int i;
 207         int num_ios, num_pri_ios;
 208         size_t bd_tbl_sz;
 209         int arr_sz = num_possible_cpus() + 1;
 210         u16 min_xid = BNX2FC_MIN_XID;
 211         u16 max_xid = hba->max_xid;
 212
 213         if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
 214                 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
 215                                         and max_xid 0x%x\n", min_xid, max_xid);
 216                 return NULL;
 217         }
 218         BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
 219
 220         num_ios = max_xid - min_xid + 1;
 221         len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
 222         len += sizeof(struct bnx2fc_cmd_mgr);
 223
 224         cmgr = kzalloc(len, GFP_KERNEL);
 225         if (!cmgr) {
 226                 printk(KERN_ERR PFX "failed to alloc cmgr\n");
 227                 return NULL;
 228         }
 229
 230         cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
 231                                   arr_sz, GFP_KERNEL);
 232         if (!cmgr->free_list) {
 233                 printk(KERN_ERR PFX "failed to alloc free_list\n");
 234                 goto mem_err;
 235         }
 236
 237         cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
 238                                        arr_sz, GFP_KERNEL);
 239         if (!cmgr->free_list_lock) {
 240                 printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
 241                 kfree(cmgr->free_list);
 242                 cmgr->free_list = NULL;
 243                 goto mem_err;
 244         }
 245
 246         cmgr->hba = hba;
 247         cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
 248
 249         for (i = 0; i < arr_sz; i++)  {
 250                 INIT_LIST_HEAD(&cmgr->free_list[i]);
 251                 spin_lock_init(&cmgr->free_list_lock[i]);
 252         }
 253
 254         /*
 255          * Pre-allocated pool of bnx2fc_cmds.
 256          * Last entry in the free list array is the free list
 257          * of slow path requests.
 258          */
 259         xid = BNX2FC_MIN_XID;
 260         num_pri_ios = num_ios - hba->elstm_xids;
 261         for (i = 0; i < num_ios; i++) {
 262                 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
 263
 264                 if (!io_req) {
 265                         printk(KERN_ERR PFX "failed to alloc io_req\n");
 266                         goto mem_err;
 267                 }
 268
 269                 INIT_LIST_HEAD(&io_req->link);
 270                 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
 271
 272                 io_req->xid = xid++;
 273                 if (i < num_pri_ios)
 274                         list_add_tail(&io_req->link,
 275                                 &cmgr->free_list[io_req->xid %
 276                                                  num_possible_cpus()]);
 277                 else
 278                         list_add_tail(&io_req->link,
 279                                 &cmgr->free_list[num_possible_cpus()]);
 280                 io_req++;
 281         }
 282
 283         /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
 284         mem_size = num_ios * sizeof(struct io_bdt *);
 285         cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL);
 286         if (!cmgr->io_bdt_pool) {
 287                 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
 288                 goto mem_err;
 289         }
 290
 291         mem_size = sizeof(struct io_bdt);
 292         for (i = 0; i < num_ios; i++) {
 293                 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
 294                 if (!cmgr->io_bdt_pool[i]) {
 295                         printk(KERN_ERR PFX "failed to alloc "
 296                                 "io_bdt_pool[%d]\n", i);
 297                         goto mem_err;
 298                 }
 299         }
 300
 301         /* Allocate an map fcoe_bdt_ctx structures */
 302         bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
 303         for (i = 0; i < num_ios; i++) {
 304                 bdt_info = cmgr->io_bdt_pool[i];
 305                 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
 306                                                       bd_tbl_sz,
 307                                                       &bdt_info->bd_tbl_dma,
 308                                                       GFP_KERNEL);
 309                 if (!bdt_info->bd_tbl) {
 310                         printk(KERN_ERR PFX "failed to alloc "
 311                                 "bdt_tbl[%d]\n", i);
 312                         goto mem_err;
 313                 }
 314         }
 315
 316         return cmgr;
 317
 318 mem_err:
 319         bnx2fc_cmd_mgr_free(cmgr);
 320         return NULL;
 321 }
 322
 323 void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
 324 {
 325         struct io_bdt *bdt_info;
 326         struct bnx2fc_hba *hba = cmgr->hba;
 327         size_t bd_tbl_sz;
 328         u16 min_xid = BNX2FC_MIN_XID;
 329         u16 max_xid = hba->max_xid;
 330         int num_ios;
 331         int i;
 332
 333         num_ios = max_xid - min_xid + 1;
 334
 335         /* Free fcoe_bdt_ctx structures */
 336         if (!cmgr->io_bdt_pool)
 337                 goto free_cmd_pool;
 338
 339         bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
 340         for (i = 0; i < num_ios; i++) {
 341                 bdt_info = cmgr->io_bdt_pool[i];
 342                 if (bdt_info->bd_tbl) {
 343                         dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
 344                                             bdt_info->bd_tbl,
 345                                             bdt_info->bd_tbl_dma);
 346                         bdt_info->bd_tbl = NULL;
 347                 }
 348         }
 349
 350         /* Destroy io_bdt pool */
 351         for (i = 0; i < num_ios; i++) {
 352                 kfree(cmgr->io_bdt_pool[i]);
 353                 cmgr->io_bdt_pool[i] = NULL;
 354         }
 355
 356         kfree(cmgr->io_bdt_pool);
 357         cmgr->io_bdt_pool = NULL;
 358
 359 free_cmd_pool:
 360         kfree(cmgr->free_list_lock);
 361
 362         /* Destroy cmd pool */
 363         if (!cmgr->free_list)
 364                 goto free_cmgr;
 365
 366         for (i = 0; i < num_possible_cpus() + 1; i++)  {
 367                 struct bnx2fc_cmd *tmp, *io_req;
 368
 369                 list_for_each_entry_safe(io_req, tmp,
 370                                          &cmgr->free_list[i], link) {
 371                         list_del(&io_req->link);
 372                         kfree(io_req);
 373                 }
 374         }
 375         kfree(cmgr->free_list);
 376 free_cmgr:
 377         /* Free command manager itself */
 378         kfree(cmgr);
 379 }
 380
 381 struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
 382 {
 383         struct fcoe_port *port = tgt->port;
 384         struct bnx2fc_interface *interface = port->priv;
 385         struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
 386         struct bnx2fc_cmd *io_req;
 387         struct list_head *listp;
 388         struct io_bdt *bd_tbl;
 389         int index = RESERVE_FREE_LIST_INDEX;
 390         u32 free_sqes;
 391         u32 max_sqes;
 392         u16 xid;
 393
 394         max_sqes = tgt->max_sqes;
 395         switch (type) {
 396         case BNX2FC_TASK_MGMT_CMD:
 397                 max_sqes = BNX2FC_TM_MAX_SQES;
 398                 break;
 399         case BNX2FC_ELS:
 400                 max_sqes = BNX2FC_ELS_MAX_SQES;
 401                 break;
 402         default:
 403                 break;
 404         }
 405
 406         /*
 407          * NOTE: Free list insertions and deletions are protected with
 408          * cmgr lock
 409          */
 410         spin_lock_bh(&cmd_mgr->free_list_lock[index]);
 411         free_sqes = atomic_read(&tgt->free_sqes);
 412         if ((list_empty(&(cmd_mgr->free_list[index]))) ||
 413             (tgt->num_active_ios.counter  >= max_sqes) ||
 414             (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
 415                 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
 416                         "ios(%d):sqes(%d)\n",
 417                         tgt->num_active_ios.counter, tgt->max_sqes);
 418                 if (list_empty(&(cmd_mgr->free_list[index])))
 419                         printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
 420                 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 421                 return NULL;
 422         }
 423
 424         listp = (struct list_head *)
 425                         cmd_mgr->free_list[index].next;
 426         list_del_init(listp);
 427         io_req = (struct bnx2fc_cmd *) listp;
 428         xid = io_req->xid;
 429         cmd_mgr->cmds[xid] = io_req;
 430         atomic_inc(&tgt->num_active_ios);
 431         atomic_dec(&tgt->free_sqes);
 432         spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 433
 434         INIT_LIST_HEAD(&io_req->link);
 435
 436         io_req->port = port;
 437         io_req->cmd_mgr = cmd_mgr;
 438         io_req->req_flags = 0;
 439         io_req->cmd_type = type;
 440
 441         /* Bind io_bdt for this io_req */
 442         /* Have a static link between io_req and io_bdt_pool */
 443         bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
 444         bd_tbl->io_req = io_req;
 445
 446         /* Hold the io_req  against deletion */
 447         kref_init(&io_req->refcount);
 448         return io_req;
 449 }
 450
 451 struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
 452 {
 453         struct fcoe_port *port = tgt->port;
 454         struct bnx2fc_interface *interface = port->priv;
 455         struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;
 456         struct bnx2fc_cmd *io_req;
 457         struct list_head *listp;
 458         struct io_bdt *bd_tbl;
 459         u32 free_sqes;
 460         u32 max_sqes;
 461         u16 xid;
 462         int index = get_cpu();
 463
 464         max_sqes = BNX2FC_SCSI_MAX_SQES;
 465         /*
 466          * NOTE: Free list insertions and deletions are protected with
 467          * cmgr lock
 468          */
 469         spin_lock_bh(&cmd_mgr->free_list_lock[index]);
 470         free_sqes = atomic_read(&tgt->free_sqes);
 471         if ((list_empty(&cmd_mgr->free_list[index])) ||
 472             (tgt->num_active_ios.counter  >= max_sqes) ||
 473             (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {
 474                 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 475                 put_cpu();
 476                 return NULL;
 477         }
 478
 479         listp = (struct list_head *)
 480                 cmd_mgr->free_list[index].next;
 481         list_del_init(listp);
 482         io_req = (struct bnx2fc_cmd *) listp;
 483         xid = io_req->xid;
 484         cmd_mgr->cmds[xid] = io_req;
 485         atomic_inc(&tgt->num_active_ios);
 486         atomic_dec(&tgt->free_sqes);
 487         spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 488         put_cpu();
 489
 490         INIT_LIST_HEAD(&io_req->link);
 491
 492         io_req->port = port;
 493         io_req->cmd_mgr = cmd_mgr;
 494         io_req->req_flags = 0;
 495
 496         /* Bind io_bdt for this io_req */
 497         /* Have a static link between io_req and io_bdt_pool */
 498         bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
 499         bd_tbl->io_req = io_req;
 500
 501         /* Hold the io_req  against deletion */
 502         kref_init(&io_req->refcount);
 503         return io_req;
 504 }
 505
 506 void bnx2fc_cmd_release(struct kref *ref)
 507 {
 508         struct bnx2fc_cmd *io_req = container_of(ref,
 509                                                 struct bnx2fc_cmd, refcount);
 510         struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
 511         int index;
 512
 513         if (io_req->cmd_type == BNX2FC_SCSI_CMD)
 514                 index = io_req->xid % num_possible_cpus();
 515         else
 516                 index = RESERVE_FREE_LIST_INDEX;
 517
 518
 519         spin_lock_bh(&cmd_mgr->free_list_lock[index]);
 520         if (io_req->cmd_type != BNX2FC_SCSI_CMD)
 521                 bnx2fc_free_mp_resc(io_req);
 522         cmd_mgr->cmds[io_req->xid] = NULL;
 523         /* Delete IO from retire queue */
 524         list_del_init(&io_req->link);
 525         /* Add it to the free list */
 526         list_add(&io_req->link,
 527                         &cmd_mgr->free_list[index]);
 528         atomic_dec(&io_req->tgt->num_active_ios);
 529         spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
 530
 531 }
 532
 533 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
 534 {
 535         struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
 536         struct bnx2fc_interface *interface = io_req->port->priv;
 537         struct bnx2fc_hba *hba = interface->hba;
 538         size_t sz = sizeof(struct fcoe_bd_ctx);
 539
 540         /* clear tm flags */
 541         mp_req->tm_flags = 0;
 542         if (mp_req->mp_req_bd) {
 543                 dma_free_coherent(&hba->pcidev->dev, sz,
 544                                      mp_req->mp_req_bd,
 545                                      mp_req->mp_req_bd_dma);
 546                 mp_req->mp_req_bd = NULL;
 547         }
 548         if (mp_req->mp_resp_bd) {
 549                 dma_free_coherent(&hba->pcidev->dev, sz,
 550                                      mp_req->mp_resp_bd,
 551                                      mp_req->mp_resp_bd_dma);
 552                 mp_req->mp_resp_bd = NULL;
 553         }
 554         if (mp_req->req_buf) {
 555                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 556                                      mp_req->req_buf,
 557                                      mp_req->req_buf_dma);
 558                 mp_req->req_buf = NULL;
 559         }
 560         if (mp_req->resp_buf) {
 561                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 562                                      mp_req->resp_buf,
 563                                      mp_req->resp_buf_dma);
 564                 mp_req->resp_buf = NULL;
 565         }
 566 }
 567
 568 int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
 569 {
 570         struct bnx2fc_mp_req *mp_req;
 571         struct fcoe_bd_ctx *mp_req_bd;
 572         struct fcoe_bd_ctx *mp_resp_bd;
 573         struct bnx2fc_interface *interface = io_req->port->priv;
 574         struct bnx2fc_hba *hba = interface->hba;
 575         dma_addr_t addr;
 576         size_t sz;
 577
 578         mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
 579         memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
 580
 581         if (io_req->cmd_type != BNX2FC_ELS) {
 582                 mp_req->req_len = sizeof(struct fcp_cmnd);
 583                 io_req->data_xfer_len = mp_req->req_len;
 584         } else
 585                 mp_req->req_len = io_req->data_xfer_len;
 586
 587         mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 588                                              &mp_req->req_buf_dma,
 589                                              GFP_ATOMIC);
 590         if (!mp_req->req_buf) {
 591                 printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
 592                 bnx2fc_free_mp_resc(io_req);
 593                 return FAILED;
 594         }
 595
 596         mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 597                                               &mp_req->resp_buf_dma,
 598                                               GFP_ATOMIC);
 599         if (!mp_req->resp_buf) {
 600                 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
 601                 bnx2fc_free_mp_resc(io_req);
 602                 return FAILED;
 603         }
 604         memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE);
 605         memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE);
 606
 607         /* Allocate and map mp_req_bd and mp_resp_bd */
 608         sz = sizeof(struct fcoe_bd_ctx);
 609         mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
 610                                                  &mp_req->mp_req_bd_dma,
 611                                                  GFP_ATOMIC);
 612         if (!mp_req->mp_req_bd) {
 613                 printk(KERN_ERR PFX "unable to alloc MP req bd\n");
 614                 bnx2fc_free_mp_resc(io_req);
 615                 return FAILED;
 616         }
 617         mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
 618                                                  &mp_req->mp_resp_bd_dma,
 619                                                  GFP_ATOMIC);
 620         if (!mp_req->mp_resp_bd) {
 621                 printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
 622                 bnx2fc_free_mp_resc(io_req);
 623                 return FAILED;
 624         }
 625         /* Fill bd table */
 626         addr = mp_req->req_buf_dma;
 627         mp_req_bd = mp_req->mp_req_bd;
 628         mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
 629         mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
 630         mp_req_bd->buf_len = CNIC_PAGE_SIZE;
 631         mp_req_bd->flags = 0;
 632
 633         /*
 634          * MP buffer is either a task mgmt command or an ELS.
 635          * So the assumption is that it consumes a single bd
 636          * entry in the bd table
 637          */
 638         mp_resp_bd = mp_req->mp_resp_bd;
 639         addr = mp_req->resp_buf_dma;
 640         mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
 641         mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
 642         mp_resp_bd->buf_len = CNIC_PAGE_SIZE;
 643         mp_resp_bd->flags = 0;
 644
 645         return SUCCESS;
 646 }
 647
 648 static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
 649 {
 650         struct fc_lport *lport;
 651         struct fc_rport *rport;
 652         struct fc_rport_libfc_priv *rp;
 653         struct fcoe_port *port;
 654         struct bnx2fc_interface *interface;
 655         struct bnx2fc_rport *tgt;
 656         struct bnx2fc_cmd *io_req;
 657         struct bnx2fc_mp_req *tm_req;
 658         struct fcoe_task_ctx_entry *task;
 659         struct fcoe_task_ctx_entry *task_page;
 660         struct Scsi_Host *host = sc_cmd->device->host;
 661         struct fc_frame_header *fc_hdr;
 662         struct fcp_cmnd *fcp_cmnd;
 663         int task_idx, index;
 664         int rc = SUCCESS;
 665         u16 xid;
 666         u32 sid, did;
 667         unsigned long start = jiffies;
 668
 669         lport = shost_priv(host);
 670         rport = starget_to_rport(scsi_target(sc_cmd->device));
 671         port = lport_priv(lport);
 672         interface = port->priv;
 673
 674         if (rport == NULL) {
 675                 printk(KERN_ERR PFX "device_reset: rport is NULL\n");
 676                 rc = FAILED;
 677                 goto tmf_err;
 678         }
 679         rp = rport->dd_data;
 680
 681         rc = fc_block_scsi_eh(sc_cmd);
 682         if (rc)
 683                 return rc;
 684
 685         if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
 686                 printk(KERN_ERR PFX "device_reset: link is not ready\n");
 687                 rc = FAILED;
 688                 goto tmf_err;
 689         }
 690         /* rport and tgt are allocated together, so tgt should be non-NULL */
 691         tgt = (struct bnx2fc_rport *)&rp[1];
 692
 693         if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
 694                 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
 695                 rc = FAILED;
 696                 goto tmf_err;
 697         }
 698 retry_tmf:
 699         io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
 700         if (!io_req) {
 701                 if (time_after(jiffies, start + HZ)) {
 702                         printk(KERN_ERR PFX "tmf: Failed TMF");
 703                         rc = FAILED;
 704                         goto tmf_err;
 705                 }
 706                 msleep(20);
 707                 goto retry_tmf;
 708         }
 709         /* Initialize rest of io_req fields */
 710         io_req->sc_cmd = sc_cmd;
 711         io_req->port = port;
 712         io_req->tgt = tgt;
 713
 714         tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
 715
 716         rc = bnx2fc_init_mp_req(io_req);
 717         if (rc == FAILED) {
 718                 printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
 719                 spin_lock_bh(&tgt->tgt_lock);
 720                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
 721                 spin_unlock_bh(&tgt->tgt_lock);
 722                 goto tmf_err;
 723         }
 724
 725         /* Set TM flags */
 726         io_req->io_req_flags = 0;
 727         tm_req->tm_flags = tm_flags;
 728
 729         /* Fill FCP_CMND */
 730         bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
 731         fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
 732         memset(fcp_cmnd->fc_cdb, 0,  sc_cmd->cmd_len);
 733         fcp_cmnd->fc_dl = 0;
 734
 735         /* Fill FC header */
 736         fc_hdr = &(tm_req->req_fc_hdr);
 737         sid = tgt->sid;
 738         did = rport->port_id;
 739         __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,
 740                            FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
 741                            FC_FC_SEQ_INIT, 0);
 742         /* Obtain exchange id */
 743         xid = io_req->xid;
 744
 745         BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
 746         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 747         index = xid % BNX2FC_TASKS_PER_PAGE;
 748
 749         /* Initialize task context for this IO request */
 750         task_page = (struct fcoe_task_ctx_entry *)
 751                         interface->hba->task_ctx[task_idx];
 752         task = &(task_page[index]);
 753         bnx2fc_init_mp_task(io_req, task);
 754
 755         sc_cmd->SCp.ptr = (char *)io_req;
 756
 757         /* Obtain free SQ entry */
 758         spin_lock_bh(&tgt->tgt_lock);
 759         bnx2fc_add_2_sq(tgt, xid);
 760
 761         /* Enqueue the io_req to active_tm_queue */
 762         io_req->on_tmf_queue = 1;
 763         list_add_tail(&io_req->link, &tgt->active_tm_queue);
 764
 765         init_completion(&io_req->tm_done);
 766         io_req->wait_for_comp = 1;
 767
 768         /* Ring doorbell */
 769         bnx2fc_ring_doorbell(tgt);
 770         spin_unlock_bh(&tgt->tgt_lock);
 771
 772         rc = wait_for_completion_timeout(&io_req->tm_done,
 773                                          BNX2FC_TM_TIMEOUT * HZ);
 774         spin_lock_bh(&tgt->tgt_lock);
 775
 776         io_req->wait_for_comp = 0;
 777         if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) {
 778                 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
 779                 if (io_req->on_tmf_queue) {
 780                         list_del_init(&io_req->link);
 781                         io_req->on_tmf_queue = 0;
 782                 }
 783                 io_req->wait_for_comp = 1;
 784                 bnx2fc_initiate_cleanup(io_req);
 785                 spin_unlock_bh(&tgt->tgt_lock);
 786                 rc = wait_for_completion_timeout(&io_req->tm_done,
 787                                                  BNX2FC_FW_TIMEOUT);
 788                 spin_lock_bh(&tgt->tgt_lock);
 789                 io_req->wait_for_comp = 0;
 790                 if (!rc)
 791                         kref_put(&io_req->refcount, bnx2fc_cmd_release);
 792         }
 793
 794         spin_unlock_bh(&tgt->tgt_lock);
 795
 796         if (!rc) {
 797                 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");
 798                 rc = FAILED;
 799         } else {
 800                 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");
 801                 rc = SUCCESS;
 802         }
 803 tmf_err:
 804         return rc;
 805 }
 806
 807 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
 808 {
 809         struct fc_lport *lport;
 810         struct bnx2fc_rport *tgt = io_req->tgt;
 811         struct fc_rport *rport = tgt->rport;
 812         struct fc_rport_priv *rdata = tgt->rdata;
 813         struct bnx2fc_interface *interface;
 814         struct fcoe_port *port;
 815         struct bnx2fc_cmd *abts_io_req;
 816         struct fcoe_task_ctx_entry *task;
 817         struct fcoe_task_ctx_entry *task_page;
 818         struct fc_frame_header *fc_hdr;
 819         struct bnx2fc_mp_req *abts_req;
 820         int task_idx, index;
 821         u32 sid, did;
 822         u16 xid;
 823         int rc = SUCCESS;
 824         u32 r_a_tov = rdata->r_a_tov;
 825
 826         /* called with tgt_lock held */
 827         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
 828
 829         port = io_req->port;
 830         interface = port->priv;
 831         lport = port->lport;
 832
 833         if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
 834                 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
 835                 rc = FAILED;
 836                 goto abts_err;
 837         }
 838
 839         if (rport == NULL) {
 840                 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");
 841                 rc = FAILED;
 842                 goto abts_err;
 843         }
 844
 845         if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
 846                 printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
 847                 rc = FAILED;
 848                 goto abts_err;
 849         }
 850
 851         abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
 852         if (!abts_io_req) {
 853                 printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
 854                 rc = FAILED;
 855                 goto abts_err;
 856         }
 857
 858         /* Initialize rest of io_req fields */
 859         abts_io_req->sc_cmd = NULL;
 860         abts_io_req->port = port;
 861         abts_io_req->tgt = tgt;
 862         abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
 863
 864         abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
 865         memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
 866
 867         /* Fill FC header */
 868         fc_hdr = &(abts_req->req_fc_hdr);
 869
 870         /* Obtain oxid and rxid for the original exchange to be aborted */
 871         fc_hdr->fh_ox_id = htons(io_req->xid);
 872         fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
 873
 874         sid = tgt->sid;
 875         did = rport->port_id;
 876
 877         __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
 878                            FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
 879                            FC_FC_SEQ_INIT, 0);
 880
 881         xid = abts_io_req->xid;
 882         BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
 883         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 884         index = xid % BNX2FC_TASKS_PER_PAGE;
 885
 886         /* Initialize task context for this IO request */
 887         task_page = (struct fcoe_task_ctx_entry *)
 888                         interface->hba->task_ctx[task_idx];
 889         task = &(task_page[index]);
 890         bnx2fc_init_mp_task(abts_io_req, task);
 891
 892         /*
 893          * ABTS task is a temporary task that will be cleaned up
 894          * irrespective of ABTS response. We need to start the timer
 895          * for the original exchange, as the CQE is posted for the original
 896          * IO request.
 897          *
 898          * Timer for ABTS is started only when it is originated by a
 899          * TM request. For the ABTS issued as part of ULP timeout,
 900          * scsi-ml maintains the timers.
 901          */
 902
 903         /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
 904         bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
 905
 906         /* Obtain free SQ entry */
 907         bnx2fc_add_2_sq(tgt, xid);
 908
 909         /* Ring doorbell */
 910         bnx2fc_ring_doorbell(tgt);
 911
 912 abts_err:
 913         return rc;
 914 }
 915
 916 int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,
 917                                 enum fc_rctl r_ctl)
 918 {
 919         struct fc_lport *lport;
 920         struct bnx2fc_rport *tgt = orig_io_req->tgt;
 921         struct bnx2fc_interface *interface;
 922         struct fcoe_port *port;
 923         struct bnx2fc_cmd *seq_clnp_req;
 924         struct fcoe_task_ctx_entry *task;
 925         struct fcoe_task_ctx_entry *task_page;
 926         struct bnx2fc_els_cb_arg *cb_arg = NULL;
 927         int task_idx, index;
 928         u16 xid;
 929         int rc = 0;
 930
 931         BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n",
 932                    orig_io_req->xid);
 933         kref_get(&orig_io_req->refcount);
 934
 935         port = orig_io_req->port;
 936         interface = port->priv;
 937         lport = port->lport;
 938
 939         cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
 940         if (!cb_arg) {
 941                 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");
 942                 rc = -ENOMEM;
 943                 goto cleanup_err;
 944         }
 945
 946         seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);
 947         if (!seq_clnp_req) {
 948                 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
 949                 rc = -ENOMEM;
 950                 kfree(cb_arg);
 951                 goto cleanup_err;
 952         }
 953         /* Initialize rest of io_req fields */
 954         seq_clnp_req->sc_cmd = NULL;
 955         seq_clnp_req->port = port;
 956         seq_clnp_req->tgt = tgt;
 957         seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */
 958
 959         xid = seq_clnp_req->xid;
 960
 961         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 962         index = xid % BNX2FC_TASKS_PER_PAGE;
 963
 964         /* Initialize task context for this IO request */
 965         task_page = (struct fcoe_task_ctx_entry *)
 966                      interface->hba->task_ctx[task_idx];
 967         task = &(task_page[index]);
 968         cb_arg->aborted_io_req = orig_io_req;
 969         cb_arg->io_req = seq_clnp_req;
 970         cb_arg->r_ctl = r_ctl;
 971         cb_arg->offset = offset;
 972         seq_clnp_req->cb_arg = cb_arg;
 973
 974         printk(KERN_ERR PFX "call init_seq_cleanup_task\n");
 975         bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);
 976
 977         /* Obtain free SQ entry */
 978         bnx2fc_add_2_sq(tgt, xid);
 979
 980         /* Ring doorbell */
 981         bnx2fc_ring_doorbell(tgt);
 982 cleanup_err:
 983         return rc;
 984 }
 985
 986 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
 987 {
 988         struct fc_lport *lport;
 989         struct bnx2fc_rport *tgt = io_req->tgt;
 990         struct bnx2fc_interface *interface;
 991         struct fcoe_port *port;
 992         struct bnx2fc_cmd *cleanup_io_req;
 993         struct fcoe_task_ctx_entry *task;
 994         struct fcoe_task_ctx_entry *task_page;
 995         int task_idx, index;
 996         u16 xid, orig_xid;
 997         int rc = 0;
 998
 999         /* ASSUMPTION: called with tgt_lock held */
1000         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
1001
1002         port = io_req->port;
1003         interface = port->priv;
1004         lport = port->lport;
1005
1006         cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
1007         if (!cleanup_io_req) {
1008                 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
1009                 rc = -1;
1010                 goto cleanup_err;
1011         }
1012
1013         /* Initialize rest of io_req fields */
1014         cleanup_io_req->sc_cmd = NULL;
1015         cleanup_io_req->port = port;
1016         cleanup_io_req->tgt = tgt;
1017         cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
1018
1019         xid = cleanup_io_req->xid;
1020
1021         task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1022         index = xid % BNX2FC_TASKS_PER_PAGE;
1023
1024         /* Initialize task context for this IO request */
1025         task_page = (struct fcoe_task_ctx_entry *)
1026                         interface->hba->task_ctx[task_idx];
1027         task = &(task_page[index]);
1028         orig_xid = io_req->xid;
1029
1030         BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
1031
1032         bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
1033
1034         /* Obtain free SQ entry */
1035         bnx2fc_add_2_sq(tgt, xid);
1036
1037         /* Ring doorbell */
1038         bnx2fc_ring_doorbell(tgt);
1039
1040 cleanup_err:
1041         return rc;
1042 }
1043
1044 /**
1045  * bnx2fc_eh_target_reset: Reset a target
1046  *
1047  * @sc_cmd:     SCSI command
1048  *
1049  * Set from SCSI host template to send task mgmt command to the target
1050  *      and wait for the response
1051  */
1052 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
1053 {
1054         return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
1055 }
1056
1057 /**
1058  * bnx2fc_eh_device_reset - Reset a single LUN
1059  *
1060  * @sc_cmd:     SCSI command
1061  *
1062  * Set from SCSI host template to send task mgmt command to the target
1063  *      and wait for the response
1064  */
1065 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1066 {
1067         return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1068 }
1069
1070 int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)
1071 {
1072         struct bnx2fc_rport *tgt = io_req->tgt;
1073         int rc = SUCCESS;
1074
1075         io_req->wait_for_comp = 1;
1076         bnx2fc_initiate_cleanup(io_req);
1077
1078         spin_unlock_bh(&tgt->tgt_lock);
1079
1080         wait_for_completion(&io_req->tm_done);
1081
1082         io_req->wait_for_comp = 0;
1083         /*
1084          * release the reference taken in eh_abort to allow the
1085          * target to re-login after flushing IOs
1086          */
1087         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1088
1089         spin_lock_bh(&tgt->tgt_lock);
1090         return rc;
1091 }
1092 /**
1093  * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1094  *                      SCSI command
1095  *
1096  * @sc_cmd:     SCSI_ML command pointer
1097  *
1098  * SCSI abort request handler
1099  */
1100 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1101 {
1102         struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1103         struct fc_rport_libfc_priv *rp = rport->dd_data;
1104         struct bnx2fc_cmd *io_req;
1105         struct fc_lport *lport;
1106         struct bnx2fc_rport *tgt;
1107         int rc = FAILED;
1108
1109
1110         rc = fc_block_scsi_eh(sc_cmd);
1111         if (rc)
1112                 return rc;
1113
1114         lport = shost_priv(sc_cmd->device->host);
1115         if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1116                 printk(KERN_ERR PFX "eh_abort: link not ready\n");
1117                 return rc;
1118         }
1119
1120         tgt = (struct bnx2fc_rport *)&rp[1];
1121
1122         BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1123
1124         spin_lock_bh(&tgt->tgt_lock);
1125         io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
1126         if (!io_req) {
1127                 /* Command might have just completed */
1128                 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1129                 spin_unlock_bh(&tgt->tgt_lock);
1130                 return SUCCESS;
1131         }
1132         BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
1133                       io_req->refcount.refcount.counter);
1134
1135         /* Hold IO request across abort processing */
1136         kref_get(&io_req->refcount);
1137
1138         BUG_ON(tgt != io_req->tgt);
1139
1140         /* Remove the io_req from the active_q. */
1141         /*
1142          * Task Mgmt functions (LUN RESET & TGT RESET) will not
1143          * issue an ABTS on this particular IO req, as the
1144          * io_req is no longer in the active_q.
1145          */
1146         if (tgt->flush_in_prog) {
1147                 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1148                         "flush in progress\n", io_req->xid);
1149                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1150                 spin_unlock_bh(&tgt->tgt_lock);
1151                 return SUCCESS;
1152         }
1153
1154         if (io_req->on_active_queue == 0) {
1155                 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1156                                 "not on active_q\n", io_req->xid);
1157                 /*
1158                  * This condition can happen only due to the FW bug,
1159                  * where we do not receive cleanup response from
1160                  * the FW. Handle this case gracefully by erroring
1161                  * back the IO request to SCSI-ml
1162                  */
1163                 bnx2fc_scsi_done(io_req, DID_ABORT);
1164
1165                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1166                 spin_unlock_bh(&tgt->tgt_lock);
1167                 return SUCCESS;
1168         }
1169
1170         /*
1171          * Only eh_abort processing will remove the IO from
1172          * active_cmd_q before processing the request. this is
1173          * done to avoid race conditions between IOs aborted
1174          * as part of task management completion and eh_abort
1175          * processing
1176          */
1177         list_del_init(&io_req->link);
1178         io_req->on_active_queue = 0;
1179         /* Move IO req to retire queue */
1180         list_add_tail(&io_req->link, &tgt->io_retire_queue);
1181
1182         init_completion(&io_req->tm_done);
1183
1184         if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
1185                 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1186                                 "already in abts processing\n", io_req->xid);
1187                 if (cancel_delayed_work(&io_req->timeout_work))
1188                         kref_put(&io_req->refcount,
1189                                  bnx2fc_cmd_release); /* drop timer hold */
1190                 rc = bnx2fc_abts_cleanup(io_req);
1191                 /* This only occurs when an task abort was requested while ABTS
1192                    is in progress.  Setting the IO_CLEANUP flag will skip the
1193                    RRQ process in the case when the fw generated SCSI_CMD cmpl
1194                    was a result from the ABTS request rather than the CLEANUP
1195                    request */
1196                 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
1197                 goto out;
1198         }
1199
1200         /* Cancel the current timer running on this io_req */
1201         if (cancel_delayed_work(&io_req->timeout_work))
1202                 kref_put(&io_req->refcount,
1203                          bnx2fc_cmd_release); /* drop timer hold */
1204         set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
1205         io_req->wait_for_comp = 1;
1206         rc = bnx2fc_initiate_abts(io_req);
1207         if (rc == FAILED) {
1208                 bnx2fc_initiate_cleanup(io_req);
1209                 spin_unlock_bh(&tgt->tgt_lock);
1210                 wait_for_completion(&io_req->tm_done);
1211                 spin_lock_bh(&tgt->tgt_lock);
1212                 io_req->wait_for_comp = 0;
1213                 goto done;
1214         }
1215         spin_unlock_bh(&tgt->tgt_lock);
1216
1217         wait_for_completion(&io_req->tm_done);
1218
1219         spin_lock_bh(&tgt->tgt_lock);
1220         io_req->wait_for_comp = 0;
1221         if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1222                 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n");
1223                 rc = SUCCESS;
1224         } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1225                                       &io_req->req_flags))) {
1226                 /* Let the scsi-ml try to recover this command */
1227                 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1228                        io_req->xid);
1229                 rc = bnx2fc_abts_cleanup(io_req);
1230                 goto out;
1231         } else {
1232                 /*
1233                  * We come here even when there was a race condition
1234                  * between timeout and abts completion, and abts
1235                  * completion happens just in time.
1236                  */
1237                 BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1238                 rc = SUCCESS;
1239                 bnx2fc_scsi_done(io_req, DID_ABORT);
1240                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1241         }
1242 done:
1243         /* release the reference taken in eh_abort */
1244         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1245 out:
1246         spin_unlock_bh(&tgt->tgt_lock);
1247         return rc;
1248 }
1249
1250 void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,
1251                                       struct fcoe_task_ctx_entry *task,
1252                                       u8 rx_state)
1253 {
1254         struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;
1255         struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;
1256         u32 offset = cb_arg->offset;
1257         enum fc_rctl r_ctl = cb_arg->r_ctl;
1258         int rc = 0;
1259         struct bnx2fc_rport *tgt = orig_io_req->tgt;
1260
1261         BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"
1262                               "cmd_type = %d\n",
1263                    seq_clnp_req->xid, seq_clnp_req->cmd_type);
1264
1265         if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {
1266                 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",
1267                         seq_clnp_req->xid);
1268                 goto free_cb_arg;
1269         }
1270
1271         spin_unlock_bh(&tgt->tgt_lock);
1272         rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
1273         spin_lock_bh(&tgt->tgt_lock);
1274
1275         if (rc)
1276                 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"
1277                         " IO will abort\n");
1278         seq_clnp_req->cb_arg = NULL;
1279         kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
1280 free_cb_arg:
1281         kfree(cb_arg);
1282         return;
1283 }
1284
1285 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1286                                   struct fcoe_task_ctx_entry *task,
1287                                   u8 num_rq)
1288 {
1289         BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1290                               "refcnt = %d, cmd_type = %d\n",
1291                    io_req->refcount.refcount.counter, io_req->cmd_type);
1292         bnx2fc_scsi_done(io_req, DID_ERROR);
1293         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1294         if (io_req->wait_for_comp)
1295                 complete(&io_req->tm_done);
1296 }
1297
1298 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1299                                struct fcoe_task_ctx_entry *task,
1300                                u8 num_rq)
1301 {
1302         u32 r_ctl;
1303         u32 r_a_tov = FC_DEF_R_A_TOV;
1304         u8 issue_rrq = 0;
1305         struct bnx2fc_rport *tgt = io_req->tgt;
1306
1307         BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1308                               "refcnt = %d, cmd_type = %d\n",
1309                    io_req->xid,
1310                    io_req->refcount.refcount.counter, io_req->cmd_type);
1311
1312         if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1313                                        &io_req->req_flags)) {
1314                 BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1315                                 " this io\n");
1316                 return;
1317         }
1318
1319         /* Do not issue RRQ as this IO is already cleanedup */
1320         if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1321                                 &io_req->req_flags))
1322                 goto io_compl;
1323
1324         /*
1325          * For ABTS issued due to SCSI eh_abort_handler, timeout
1326          * values are maintained by scsi-ml itself. Cancel timeout
1327          * in case ABTS issued as part of task management function
1328          * or due to FW error.
1329          */
1330         if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1331                 if (cancel_delayed_work(&io_req->timeout_work))
1332                         kref_put(&io_req->refcount,
1333                                  bnx2fc_cmd_release); /* drop timer hold */
1334
1335         r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
1336
1337         switch (r_ctl) {
1338         case FC_RCTL_BA_ACC:
1339                 /*
1340                  * Dont release this cmd yet. It will be relesed
1341                  * after we get RRQ response
1342                  */
1343                 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1344                 issue_rrq = 1;
1345                 break;
1346
1347         case FC_RCTL_BA_RJT:
1348                 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1349                 break;
1350         default:
1351                 printk(KERN_ERR PFX "Unknown ABTS response\n");
1352                 break;
1353         }
1354
1355         if (issue_rrq) {
1356                 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1357                 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1358         }
1359         set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1360         bnx2fc_cmd_timer_set(io_req, r_a_tov);
1361
1362 io_compl:
1363         if (io_req->wait_for_comp) {
1364                 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1365                                        &io_req->req_flags))
1366                         complete(&io_req->tm_done);
1367         } else {
1368                 /*
1369                  * We end up here when ABTS is issued as
1370                  * in asynchronous context, i.e., as part
1371                  * of task management completion, or
1372                  * when FW error is received or when the
1373                  * ABTS is issued when the IO is timed
1374                  * out.
1375                  */
1376
1377                 if (io_req->on_active_queue) {
1378                         list_del_init(&io_req->link);
1379                         io_req->on_active_queue = 0;
1380                         /* Move IO req to retire queue */
1381                         list_add_tail(&io_req->link, &tgt->io_retire_queue);
1382                 }
1383                 bnx2fc_scsi_done(io_req, DID_ERROR);
1384                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1385         }
1386 }
1387
1388 static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1389 {
1390         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1391         struct bnx2fc_rport *tgt = io_req->tgt;
1392         struct bnx2fc_cmd *cmd, *tmp;
1393         u64 tm_lun = sc_cmd->device->lun;
1394         u64 lun;
1395         int rc = 0;
1396
1397         /* called with tgt_lock held */
1398         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1399         /*
1400          * Walk thru the active_ios queue and ABORT the IO
1401          * that matches with the LUN that was reset
1402          */
1403         list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1404                 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
1405                 lun = cmd->sc_cmd->device->lun;
1406                 if (lun == tm_lun) {
1407                         /* Initiate ABTS on this cmd */
1408                         if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1409                                               &cmd->req_flags)) {
1410                                 /* cancel the IO timeout */
1411                                 if (cancel_delayed_work(&io_req->timeout_work))
1412                                         kref_put(&io_req->refcount,
1413                                                  bnx2fc_cmd_release);
1414                                                         /* timer hold */
1415                                 rc = bnx2fc_initiate_abts(cmd);
1416                                 /* abts shouldn't fail in this context */
1417                                 WARN_ON(rc != SUCCESS);
1418                         } else
1419                                 printk(KERN_ERR PFX "lun_rst: abts already in"
1420                                         " progress for this IO 0x%x\n",
1421                                         cmd->xid);
1422                 }
1423         }
1424 }
1425
1426 static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1427 {
1428         struct bnx2fc_rport *tgt = io_req->tgt;
1429         struct bnx2fc_cmd *cmd, *tmp;
1430         int rc = 0;
1431
1432         /* called with tgt_lock held */
1433         BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1434         /*
1435          * Walk thru the active_ios queue and ABORT the IO
1436          * that matches with the LUN that was reset
1437          */
1438         list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1439                 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
1440                 /* Initiate ABTS */
1441                 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1442                                                         &cmd->req_flags)) {
1443                         /* cancel the IO timeout */
1444                         if (cancel_delayed_work(&io_req->timeout_work))
1445                                 kref_put(&io_req->refcount,
1446                                          bnx2fc_cmd_release); /* timer hold */
1447                         rc = bnx2fc_initiate_abts(cmd);
1448                         /* abts shouldn't fail in this context */
1449                         WARN_ON(rc != SUCCESS);
1450
1451                 } else
1452                         printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1453                                 " for this IO 0x%x\n", cmd->xid);
1454         }
1455 }
1456
1457 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
1458                              struct fcoe_task_ctx_entry *task, u8 num_rq)
1459 {
1460         struct bnx2fc_mp_req *tm_req;
1461         struct fc_frame_header *fc_hdr;
1462         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1463         u64 *hdr;
1464         u64 *temp_hdr;
1465         void *rsp_buf;
1466
1467         /* Called with tgt_lock held */
1468         BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1469
1470         if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1471                 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1472         else {
1473                 /* TM has already timed out and we got
1474                  * delayed completion. Ignore completion
1475                  * processing.
1476                  */
1477                 return;
1478         }
1479
1480         tm_req = &(io_req->mp_req);
1481         fc_hdr = &(tm_req->resp_fc_hdr);
1482         hdr = (u64 *)fc_hdr;
1483         temp_hdr = (u64 *)
1484                 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
1485         hdr[0] = cpu_to_be64(temp_hdr[0]);
1486         hdr[1] = cpu_to_be64(temp_hdr[1]);
1487         hdr[2] = cpu_to_be64(temp_hdr[2]);
1488
1489         tm_req->resp_len =
1490                 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
1491
1492         rsp_buf = tm_req->resp_buf;
1493
1494         if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1495                 bnx2fc_parse_fcp_rsp(io_req,
1496                                      (struct fcoe_fcp_rsp_payload *)
1497                                      rsp_buf, num_rq);
1498                 if (io_req->fcp_rsp_code == 0) {
1499                         /* TM successful */
1500                         if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1501                                 bnx2fc_lun_reset_cmpl(io_req);
1502                         else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1503                                 bnx2fc_tgt_reset_cmpl(io_req);
1504                 }
1505         } else {
1506                 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1507                         fc_hdr->fh_r_ctl);
1508         }
1509         if (!sc_cmd->SCp.ptr) {
1510                 printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n");
1511                 return;
1512         }
1513         switch (io_req->fcp_status) {
1514         case FC_GOOD:
1515                 if (io_req->cdb_status == 0) {
1516                         /* Good IO completion */
1517                         sc_cmd->result = DID_OK << 16;
1518                 } else {
1519                         /* Transport status is good, SCSI status not good */
1520                         sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1521                 }
1522                 if (io_req->fcp_resid)
1523                         scsi_set_resid(sc_cmd, io_req->fcp_resid);
1524                 break;
1525
1526         default:
1527                 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1528                            io_req->fcp_status);
1529                 break;
1530         }
1531
1532         sc_cmd = io_req->sc_cmd;
1533         io_req->sc_cmd = NULL;
1534
1535         /* check if the io_req exists in tgt's tmf_q */
1536         if (io_req->on_tmf_queue) {
1537
1538                 list_del_init(&io_req->link);
1539                 io_req->on_tmf_queue = 0;
1540         } else {
1541
1542                 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");
1543                 return;
1544         }
1545
1546         sc_cmd->SCp.ptr = NULL;
1547         sc_cmd->scsi_done(sc_cmd);
1548
1549         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1550         if (io_req->wait_for_comp) {
1551                 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
1552                 complete(&io_req->tm_done);
1553         }
1554 }
1555
1556 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1557                            int bd_index)
1558 {
1559         struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1560         int frag_size, sg_frags;
1561
1562         sg_frags = 0;
1563         while (sg_len) {
1564                 if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1565                         frag_size = BNX2FC_BD_SPLIT_SZ;
1566                 else
1567                         frag_size = sg_len;
1568                 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1569                 bd[bd_index + sg_frags].buf_addr_hi  = addr >> 32;
1570                 bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1571                 bd[bd_index + sg_frags].flags = 0;
1572
1573                 addr += (u64) frag_size;
1574                 sg_frags++;
1575                 sg_len -= frag_size;
1576         }
1577         return sg_frags;
1578
1579 }
1580
1581 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1582 {
1583         struct bnx2fc_interface *interface = io_req->port->priv;
1584         struct bnx2fc_hba *hba = interface->hba;
1585         struct scsi_cmnd *sc = io_req->sc_cmd;
1586         struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1587         struct scatterlist *sg;
1588         int byte_count = 0;
1589         int sg_count = 0;
1590         int bd_count = 0;
1591         int sg_frags;
1592         unsigned int sg_len;
1593         u64 addr;
1594         int i;
1595
1596         /*
1597          * Use dma_map_sg directly to ensure we're using the correct
1598          * dev struct off of pcidev.
1599          */
1600         sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),
1601                               scsi_sg_count(sc), sc->sc_data_direction);
1602         scsi_for_each_sg(sc, sg, sg_count, i) {
1603                 sg_len = sg_dma_len(sg);
1604                 addr = sg_dma_address(sg);
1605                 if (sg_len > BNX2FC_MAX_BD_LEN) {
1606                         sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1607                                                    bd_count);
1608                 } else {
1609
1610                         sg_frags = 1;
1611                         bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1612                         bd[bd_count].buf_addr_hi  = addr >> 32;
1613                         bd[bd_count].buf_len = (u16)sg_len;
1614                         bd[bd_count].flags = 0;
1615                 }
1616                 bd_count += sg_frags;
1617                 byte_count += sg_len;
1618         }
1619         if (byte_count != scsi_bufflen(sc))
1620                 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1621                         "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1622                         io_req->xid);
1623         return bd_count;
1624 }
1625
1626 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
1627 {
1628         struct scsi_cmnd *sc = io_req->sc_cmd;
1629         struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1630         int bd_count;
1631
1632         if (scsi_sg_count(sc)) {
1633                 bd_count = bnx2fc_map_sg(io_req);
1634                 if (bd_count == 0)
1635                         return -ENOMEM;
1636         } else {
1637                 bd_count = 0;
1638                 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1639                 bd[0].buf_len = bd[0].flags = 0;
1640         }
1641         io_req->bd_tbl->bd_valid = bd_count;
1642
1643         return 0;
1644 }
1645
1646 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1647 {
1648         struct scsi_cmnd *sc = io_req->sc_cmd;
1649         struct bnx2fc_interface *interface = io_req->port->priv;
1650         struct bnx2fc_hba *hba = interface->hba;
1651
1652         /*
1653          * Use dma_unmap_sg directly to ensure we're using the correct
1654          * dev struct off of pcidev.
1655          */
1656         if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
1657                 dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc),
1658                     scsi_sg_count(sc), sc->sc_data_direction);
1659                 io_req->bd_tbl->bd_valid = 0;
1660         }
1661 }
1662
1663 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1664                                   struct fcp_cmnd *fcp_cmnd)
1665 {
1666         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1667
1668         memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1669
1670         int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun);
1671
1672         fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1673         memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1674
1675         fcp_cmnd->fc_cmdref = 0;
1676         fcp_cmnd->fc_pri_ta = 0;
1677         fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1678         fcp_cmnd->fc_flags = io_req->io_req_flags;
1679         fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
1680 }
1681
1682 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1683                                  struct fcoe_fcp_rsp_payload *fcp_rsp,
1684                                  u8 num_rq)
1685 {
1686         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1687         struct bnx2fc_rport *tgt = io_req->tgt;
1688         u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1689         u32 rq_buff_len = 0;
1690         int i;
1691         unsigned char *rq_data;
1692         unsigned char *dummy;
1693         int fcp_sns_len = 0;
1694         int fcp_rsp_len = 0;
1695
1696         io_req->fcp_status = FC_GOOD;
1697         io_req->fcp_resid = 0;
1698         if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |
1699             FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))
1700                 io_req->fcp_resid = fcp_rsp->fcp_resid;
1701
1702         io_req->scsi_comp_flags = rsp_flags;
1703         CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
1704                                 fcp_rsp->scsi_status_code;
1705
1706         /* Fetch fcp_rsp_info and fcp_sns_info if available */
1707         if (num_rq) {
1708
1709                 /*
1710                  * We do not anticipate num_rq >1, as the linux defined
1711                  * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1712                  * 256 bytes of single rq buffer is good enough to hold this.
1713                  */
1714
1715                 if (rsp_flags &
1716                     FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1717                         fcp_rsp_len = rq_buff_len
1718                                         = fcp_rsp->fcp_rsp_len;
1719                 }
1720
1721                 if (rsp_flags &
1722                     FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1723                         fcp_sns_len = fcp_rsp->fcp_sns_len;
1724                         rq_buff_len += fcp_rsp->fcp_sns_len;
1725                 }
1726
1727                 io_req->fcp_rsp_len = fcp_rsp_len;
1728                 io_req->fcp_sns_len = fcp_sns_len;
1729
1730                 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1731                         /* Invalid sense sense length. */
1732                         printk(KERN_ERR PFX "invalid sns length %d\n",
1733                                 rq_buff_len);
1734                         /* reset rq_buff_len */
1735                         rq_buff_len =  num_rq * BNX2FC_RQ_BUF_SZ;
1736                 }
1737
1738                 rq_data = bnx2fc_get_next_rqe(tgt, 1);
1739
1740                 if (num_rq > 1) {
1741                         /* We do not need extra sense data */
1742                         for (i = 1; i < num_rq; i++)
1743                                 dummy = bnx2fc_get_next_rqe(tgt, 1);
1744                 }
1745
1746                 /* fetch fcp_rsp_code */
1747                 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1748                         /* Only for task management function */
1749                         io_req->fcp_rsp_code = rq_data[3];
1750                         printk(KERN_ERR PFX "fcp_rsp_code = %d\n",
1751                                 io_req->fcp_rsp_code);
1752                 }
1753
1754                 /* fetch sense data */
1755                 rq_data += fcp_rsp_len;
1756
1757                 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
1758                         printk(KERN_ERR PFX "Truncating sense buffer\n");
1759                         fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
1760                 }
1761
1762                 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1763                 if (fcp_sns_len)
1764                         memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
1765
1766                 /* return RQ entries */
1767                 for (i = 0; i < num_rq; i++)
1768                         bnx2fc_return_rqe(tgt, 1);
1769         }
1770 }
1771
1772 /**
1773  * bnx2fc_queuecommand - Queuecommand function of the scsi template
1774  *
1775  * @host:       The Scsi_Host the command was issued to
1776  * @sc_cmd:     struct scsi_cmnd to be executed
1777  *
1778  * This is the IO strategy routine, called by SCSI-ML
1779  **/
1780 int bnx2fc_queuecommand(struct Scsi_Host *host,
1781                         struct scsi_cmnd *sc_cmd)
1782 {
1783         struct fc_lport *lport = shost_priv(host);
1784         struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1785         struct fc_rport_libfc_priv *rp = rport->dd_data;
1786         struct bnx2fc_rport *tgt;
1787         struct bnx2fc_cmd *io_req;
1788         int rc = 0;
1789         int rval;
1790
1791         rval = fc_remote_port_chkready(rport);
1792         if (rval) {
1793                 sc_cmd->result = rval;
1794                 sc_cmd->scsi_done(sc_cmd);
1795                 return 0;
1796         }
1797
1798         if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1799                 rc = SCSI_MLQUEUE_HOST_BUSY;
1800                 goto exit_qcmd;
1801         }
1802
1803         /* rport and tgt are allocated together, so tgt should be non-NULL */
1804         tgt = (struct bnx2fc_rport *)&rp[1];
1805
1806         if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
1807                 /*
1808                  * Session is not offloaded yet. Let SCSI-ml retry
1809                  * the command.
1810                  */
1811                 rc = SCSI_MLQUEUE_TARGET_BUSY;
1812                 goto exit_qcmd;
1813         }
1814         if (tgt->retry_delay_timestamp) {
1815                 if (time_after(jiffies, tgt->retry_delay_timestamp)) {
1816                         tgt->retry_delay_timestamp = 0;
1817                 } else {
1818                         /* If retry_delay timer is active, flow off the ML */
1819                         rc = SCSI_MLQUEUE_TARGET_BUSY;
1820                         goto exit_qcmd;
1821                 }
1822         }
1823
1824         spin_lock_bh(&tgt->tgt_lock);
1825
1826         io_req = bnx2fc_cmd_alloc(tgt);
1827         if (!io_req) {
1828                 rc = SCSI_MLQUEUE_HOST_BUSY;
1829                 goto exit_qcmd_tgtlock;
1830         }
1831         io_req->sc_cmd = sc_cmd;
1832
1833         if (bnx2fc_post_io_req(tgt, io_req)) {
1834                 printk(KERN_ERR PFX "Unable to post io_req\n");
1835                 rc = SCSI_MLQUEUE_HOST_BUSY;
1836                 goto exit_qcmd_tgtlock;
1837         }
1838
1839 exit_qcmd_tgtlock:
1840         spin_unlock_bh(&tgt->tgt_lock);
1841 exit_qcmd:
1842         return rc;
1843 }
1844
1845 void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
1846                                    struct fcoe_task_ctx_entry *task,
1847                                    u8 num_rq)
1848 {
1849         struct fcoe_fcp_rsp_payload *fcp_rsp;
1850         struct bnx2fc_rport *tgt = io_req->tgt;
1851         struct scsi_cmnd *sc_cmd;
1852         struct Scsi_Host *host;
1853
1854
1855         /* scsi_cmd_cmpl is called with tgt lock held */
1856
1857         if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1858                 /* we will not receive ABTS response for this IO */
1859                 BNX2FC_IO_DBG(io_req, "Timer context finished processing "
1860                            "this scsi cmd\n");
1861         }
1862
1863         /* Cancel the timeout_work, as we received IO completion */
1864         if (cancel_delayed_work(&io_req->timeout_work))
1865                 kref_put(&io_req->refcount,
1866                          bnx2fc_cmd_release); /* drop timer hold */
1867
1868         sc_cmd = io_req->sc_cmd;
1869         if (sc_cmd == NULL) {
1870                 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
1871                 return;
1872         }
1873
1874         /* Fetch fcp_rsp from task context and perform cmd completion */
1875         fcp_rsp = (struct fcoe_fcp_rsp_payload *)
1876                    &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);
1877
1878         /* parse fcp_rsp and obtain sense data from RQ if available */
1879         bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq);
1880
1881         host = sc_cmd->device->host;
1882         if (!sc_cmd->SCp.ptr) {
1883                 printk(KERN_ERR PFX "SCp.ptr is NULL\n");
1884                 return;
1885         }
1886
1887         if (io_req->on_active_queue) {
1888                 list_del_init(&io_req->link);
1889                 io_req->on_active_queue = 0;
1890                 /* Move IO req to retire queue */
1891                 list_add_tail(&io_req->link, &tgt->io_retire_queue);
1892         } else {
1893                 /* This should not happen, but could have been pulled
1894                  * by bnx2fc_flush_active_ios(), or during a race
1895                  * between command abort and (late) completion.
1896                  */
1897                 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
1898                 if (io_req->wait_for_comp)
1899                         if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1900                                                &io_req->req_flags))
1901                                 complete(&io_req->tm_done);
1902         }
1903
1904         bnx2fc_unmap_sg_list(io_req);
1905         io_req->sc_cmd = NULL;
1906
1907         switch (io_req->fcp_status) {
1908         case FC_GOOD:
1909                 if (io_req->cdb_status == 0) {
1910                         /* Good IO completion */
1911                         sc_cmd->result = DID_OK << 16;
1912                 } else {
1913                         /* Transport status is good, SCSI status not good */
1914                         BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
1915                                  " fcp_resid = 0x%x\n",
1916                                 io_req->cdb_status, io_req->fcp_resid);
1917                         sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1918
1919                         if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||
1920                             io_req->cdb_status == SAM_STAT_BUSY) {
1921                                 /* Set the jiffies + retry_delay_timer * 100ms
1922                                    for the rport/tgt */
1923                                 tgt->retry_delay_timestamp = jiffies +
1924                                         fcp_rsp->retry_delay_timer * HZ / 10;
1925                         }
1926
1927                 }
1928                 if (io_req->fcp_resid)
1929                         scsi_set_resid(sc_cmd, io_req->fcp_resid);
1930                 break;
1931         default:
1932                 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n",
1933                         io_req->fcp_status);
1934                 break;
1935         }
1936         sc_cmd->SCp.ptr = NULL;
1937         sc_cmd->scsi_done(sc_cmd);
1938         kref_put(&io_req->refcount, bnx2fc_cmd_release);
1939 }
1940
1941 int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
1942                                struct bnx2fc_cmd *io_req)
1943 {
1944         struct fcoe_task_ctx_entry *task;
1945         struct fcoe_task_ctx_entry *task_page;
1946         struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1947         struct fcoe_port *port = tgt->port;
1948         struct bnx2fc_interface *interface = port->priv;
1949         struct bnx2fc_hba *hba = interface->hba;
1950         struct fc_lport *lport = port->lport;
1951         struct fc_stats *stats;
1952         int task_idx, index;
1953         u16 xid;
1954
1955         /* bnx2fc_post_io_req() is called with the tgt_lock held */
1956
1957         /* Initialize rest of io_req fields */
1958         io_req->cmd_type = BNX2FC_SCSI_CMD;
1959         io_req->port = port;
1960         io_req->tgt = tgt;
1961         io_req->data_xfer_len = scsi_bufflen(sc_cmd);
1962         sc_cmd->SCp.ptr = (char *)io_req;
1963
1964         stats = per_cpu_ptr(lport->stats, get_cpu());
1965         if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
1966                 io_req->io_req_flags = BNX2FC_READ;
1967                 stats->InputRequests++;
1968                 stats->InputBytes += io_req->data_xfer_len;
1969         } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
1970                 io_req->io_req_flags = BNX2FC_WRITE;
1971                 stats->OutputRequests++;
1972                 stats->OutputBytes += io_req->data_xfer_len;
1973         } else {
1974                 io_req->io_req_flags = 0;
1975                 stats->ControlRequests++;
1976         }
1977         put_cpu();
1978
1979         xid = io_req->xid;
1980
1981         /* Build buffer descriptor list for firmware from sg list */
1982         if (bnx2fc_build_bd_list_from_sg(io_req)) {
1983                 printk(KERN_ERR PFX "BD list creation failed\n");
1984                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1985                 return -EAGAIN;
1986         }
1987
1988         task_idx = xid / BNX2FC_TASKS_PER_PAGE;
1989         index = xid % BNX2FC_TASKS_PER_PAGE;
1990
1991         /* Initialize task context for this IO request */
1992         task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
1993         task = &(task_page[index]);
1994         bnx2fc_init_task(io_req, task);
1995
1996         if (tgt->flush_in_prog) {
1997                 printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
1998                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
1999                 return -EAGAIN;
2000         }
2001
2002         if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
2003                 printk(KERN_ERR PFX "Session not ready...post_io\n");
2004                 kref_put(&io_req->refcount, bnx2fc_cmd_release);
2005                 return -EAGAIN;
2006         }
2007
2008         /* Time IO req */
2009         if (tgt->io_timeout)
2010                 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
2011         /* Obtain free SQ entry */
2012         bnx2fc_add_2_sq(tgt, xid);
2013
2014         /* Enqueue the io_req to active_cmd_queue */
2015
2016         io_req->on_active_queue = 1;
2017         /* move io_req from pending_queue to active_queue */
2018         list_add_tail(&io_req->link, &tgt->active_cmd_queue);
2019
2020         /* Ring doorbell */
2021         bnx2fc_ring_doorbell(tgt);
2022         return 0;
2023 }