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