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/drivers/scsi/bnx2fc/bnx2fc_io.c

http://github.com/mirrors/linux
C | 2106 lines | 1510 code | 279 blank | 317 comment | 223 complexity | 71a63b5b4083420f4256a14aa4d3998c MD5 | raw file

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   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
  19static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
  20			   int bd_index);
  21static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
  22static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
  23static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
  24static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
  25static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
  26				 struct fcoe_fcp_rsp_payload *fcp_rsp,
  27				 u8 num_rq, unsigned char *rq_data);
  28
  29void 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
  40static 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->abts_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
 156done:
 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
 162static 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
 211struct 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->hba = hba;
 244	cmgr->free_list = kcalloc(arr_sz, sizeof(*cmgr->free_list),
 245				  GFP_KERNEL);
 246	if (!cmgr->free_list) {
 247		printk(KERN_ERR PFX "failed to alloc free_list\n");
 248		goto mem_err;
 249	}
 250
 251	cmgr->free_list_lock = kcalloc(arr_sz, sizeof(*cmgr->free_list_lock),
 252				       GFP_KERNEL);
 253	if (!cmgr->free_list_lock) {
 254		printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
 255		kfree(cmgr->free_list);
 256		cmgr->free_list = NULL;
 257		goto mem_err;
 258	}
 259
 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 = kzalloc(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
 331mem_err:
 332	bnx2fc_cmd_mgr_free(cmgr);
 333	return NULL;
 334}
 335
 336void 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
 372free_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);
 389free_cmgr:
 390	/* Free command manager itself */
 391	kfree(cmgr);
 392}
 393
 394struct 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
 464struct 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
 519void 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
 546static 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
 581int 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
 661static 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	}
 711retry_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->abts_done);
 779	io_req->wait_for_abts_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->abts_done,
 786					 interface->tm_timeout * HZ);
 787	spin_lock_bh(&tgt->tgt_lock);
 788
 789	io_req->wait_for_abts_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_cleanup_comp = 1;
 797		init_completion(&io_req->cleanup_done);
 798		bnx2fc_initiate_cleanup(io_req);
 799		spin_unlock_bh(&tgt->tgt_lock);
 800		rc = wait_for_completion_timeout(&io_req->cleanup_done,
 801						 BNX2FC_FW_TIMEOUT);
 802		spin_lock_bh(&tgt->tgt_lock);
 803		io_req->wait_for_cleanup_comp = 0;
 804		if (!rc)
 805			kref_put(&io_req->refcount, bnx2fc_cmd_release);
 806	}
 807
 808	spin_unlock_bh(&tgt->tgt_lock);
 809
 810	if (!rc) {
 811		BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");
 812		rc = FAILED;
 813	} else {
 814		BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");
 815		rc = SUCCESS;
 816	}
 817tmf_err:
 818	return rc;
 819}
 820
 821int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
 822{
 823	struct fc_lport *lport;
 824	struct bnx2fc_rport *tgt = io_req->tgt;
 825	struct fc_rport *rport = tgt->rport;
 826	struct fc_rport_priv *rdata = tgt->rdata;
 827	struct bnx2fc_interface *interface;
 828	struct fcoe_port *port;
 829	struct bnx2fc_cmd *abts_io_req;
 830	struct fcoe_task_ctx_entry *task;
 831	struct fcoe_task_ctx_entry *task_page;
 832	struct fc_frame_header *fc_hdr;
 833	struct bnx2fc_mp_req *abts_req;
 834	int task_idx, index;
 835	u32 sid, did;
 836	u16 xid;
 837	int rc = SUCCESS;
 838	u32 r_a_tov = rdata->r_a_tov;
 839
 840	/* called with tgt_lock held */
 841	BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
 842
 843	port = io_req->port;
 844	interface = port->priv;
 845	lport = port->lport;
 846
 847	if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
 848		printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
 849		rc = FAILED;
 850		goto abts_err;
 851	}
 852
 853	if (rport == NULL) {
 854		printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");
 855		rc = FAILED;
 856		goto abts_err;
 857	}
 858
 859	if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
 860		printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
 861		rc = FAILED;
 862		goto abts_err;
 863	}
 864
 865	abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
 866	if (!abts_io_req) {
 867		printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
 868		rc = FAILED;
 869		goto abts_err;
 870	}
 871
 872	/* Initialize rest of io_req fields */
 873	abts_io_req->sc_cmd = NULL;
 874	abts_io_req->port = port;
 875	abts_io_req->tgt = tgt;
 876	abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
 877
 878	abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
 879	memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
 880
 881	/* Fill FC header */
 882	fc_hdr = &(abts_req->req_fc_hdr);
 883
 884	/* Obtain oxid and rxid for the original exchange to be aborted */
 885	fc_hdr->fh_ox_id = htons(io_req->xid);
 886	fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);
 887
 888	sid = tgt->sid;
 889	did = rport->port_id;
 890
 891	__fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,
 892			   FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
 893			   FC_FC_SEQ_INIT, 0);
 894
 895	xid = abts_io_req->xid;
 896	BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
 897	task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 898	index = xid % BNX2FC_TASKS_PER_PAGE;
 899
 900	/* Initialize task context for this IO request */
 901	task_page = (struct fcoe_task_ctx_entry *)
 902			interface->hba->task_ctx[task_idx];
 903	task = &(task_page[index]);
 904	bnx2fc_init_mp_task(abts_io_req, task);
 905
 906	/*
 907	 * ABTS task is a temporary task that will be cleaned up
 908	 * irrespective of ABTS response. We need to start the timer
 909	 * for the original exchange, as the CQE is posted for the original
 910	 * IO request.
 911	 *
 912	 * Timer for ABTS is started only when it is originated by a
 913	 * TM request. For the ABTS issued as part of ULP timeout,
 914	 * scsi-ml maintains the timers.
 915	 */
 916
 917	/* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
 918	bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
 919
 920	/* Obtain free SQ entry */
 921	bnx2fc_add_2_sq(tgt, xid);
 922
 923	/* Ring doorbell */
 924	bnx2fc_ring_doorbell(tgt);
 925
 926abts_err:
 927	return rc;
 928}
 929
 930int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,
 931				enum fc_rctl r_ctl)
 932{
 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
 951	cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
 952	if (!cb_arg) {
 953		printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");
 954		rc = -ENOMEM;
 955		goto cleanup_err;
 956	}
 957
 958	seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);
 959	if (!seq_clnp_req) {
 960		printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
 961		rc = -ENOMEM;
 962		kfree(cb_arg);
 963		goto cleanup_err;
 964	}
 965	/* Initialize rest of io_req fields */
 966	seq_clnp_req->sc_cmd = NULL;
 967	seq_clnp_req->port = port;
 968	seq_clnp_req->tgt = tgt;
 969	seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */
 970
 971	xid = seq_clnp_req->xid;
 972
 973	task_idx = xid/BNX2FC_TASKS_PER_PAGE;
 974	index = xid % BNX2FC_TASKS_PER_PAGE;
 975
 976	/* Initialize task context for this IO request */
 977	task_page = (struct fcoe_task_ctx_entry *)
 978		     interface->hba->task_ctx[task_idx];
 979	task = &(task_page[index]);
 980	cb_arg->aborted_io_req = orig_io_req;
 981	cb_arg->io_req = seq_clnp_req;
 982	cb_arg->r_ctl = r_ctl;
 983	cb_arg->offset = offset;
 984	seq_clnp_req->cb_arg = cb_arg;
 985
 986	printk(KERN_ERR PFX "call init_seq_cleanup_task\n");
 987	bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);
 988
 989	/* Obtain free SQ entry */
 990	bnx2fc_add_2_sq(tgt, xid);
 991
 992	/* Ring doorbell */
 993	bnx2fc_ring_doorbell(tgt);
 994cleanup_err:
 995	return rc;
 996}
 997
 998int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
 999{
1000	struct bnx2fc_rport *tgt = io_req->tgt;
1001	struct bnx2fc_interface *interface;
1002	struct fcoe_port *port;
1003	struct bnx2fc_cmd *cleanup_io_req;
1004	struct fcoe_task_ctx_entry *task;
1005	struct fcoe_task_ctx_entry *task_page;
1006	int task_idx, index;
1007	u16 xid, orig_xid;
1008	int rc = 0;
1009
1010	/* ASSUMPTION: called with tgt_lock held */
1011	BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
1012
1013	port = io_req->port;
1014	interface = port->priv;
1015
1016	cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
1017	if (!cleanup_io_req) {
1018		printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
1019		rc = -1;
1020		goto cleanup_err;
1021	}
1022
1023	/* Initialize rest of io_req fields */
1024	cleanup_io_req->sc_cmd = NULL;
1025	cleanup_io_req->port = port;
1026	cleanup_io_req->tgt = tgt;
1027	cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
1028
1029	xid = cleanup_io_req->xid;
1030
1031	task_idx = xid/BNX2FC_TASKS_PER_PAGE;
1032	index = xid % BNX2FC_TASKS_PER_PAGE;
1033
1034	/* Initialize task context for this IO request */
1035	task_page = (struct fcoe_task_ctx_entry *)
1036			interface->hba->task_ctx[task_idx];
1037	task = &(task_page[index]);
1038	orig_xid = io_req->xid;
1039
1040	BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
1041
1042	bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
1043
1044	/* Obtain free SQ entry */
1045	bnx2fc_add_2_sq(tgt, xid);
1046
1047	/* Set flag that cleanup request is pending with the firmware */
1048	set_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags);
1049
1050	/* Ring doorbell */
1051	bnx2fc_ring_doorbell(tgt);
1052
1053cleanup_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 */
1065int 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 */
1078int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
1079{
1080	return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
1081}
1082
1083static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)
1084{
1085	struct bnx2fc_rport *tgt = io_req->tgt;
1086	unsigned int time_left;
1087
1088	init_completion(&io_req->cleanup_done);
1089	io_req->wait_for_cleanup_comp = 1;
1090	bnx2fc_initiate_cleanup(io_req);
1091
1092	spin_unlock_bh(&tgt->tgt_lock);
1093
1094	/*
1095	 * Can't wait forever on cleanup response lest we let the SCSI error
1096	 * handler wait forever
1097	 */
1098	time_left = wait_for_completion_timeout(&io_req->cleanup_done,
1099						BNX2FC_FW_TIMEOUT);
1100	if (!time_left) {
1101		BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n",
1102			      __func__);
1103
1104		/*
1105		 * Put the extra reference to the SCSI command since it would
1106		 * not have been returned in this case.
1107		 */
1108		kref_put(&io_req->refcount, bnx2fc_cmd_release);
1109	}
1110
1111	spin_lock_bh(&tgt->tgt_lock);
1112	io_req->wait_for_cleanup_comp = 0;
1113	return SUCCESS;
1114}
1115
1116/**
1117 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
1118 *			SCSI command
1119 *
1120 * @sc_cmd:	SCSI_ML command pointer
1121 *
1122 * SCSI abort request handler
1123 */
1124int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
1125{
1126	struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
1127	struct fc_rport_libfc_priv *rp = rport->dd_data;
1128	struct bnx2fc_cmd *io_req;
1129	struct fc_lport *lport;
1130	struct bnx2fc_rport *tgt;
1131	int rc;
1132	unsigned int time_left;
1133
1134	rc = fc_block_scsi_eh(sc_cmd);
1135	if (rc)
1136		return rc;
1137
1138	lport = shost_priv(sc_cmd->device->host);
1139	if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
1140		printk(KERN_ERR PFX "eh_abort: link not ready\n");
1141		return FAILED;
1142	}
1143
1144	tgt = (struct bnx2fc_rport *)&rp[1];
1145
1146	BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
1147
1148	spin_lock_bh(&tgt->tgt_lock);
1149	io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
1150	if (!io_req) {
1151		/* Command might have just completed */
1152		printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
1153		spin_unlock_bh(&tgt->tgt_lock);
1154		return SUCCESS;
1155	}
1156	BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
1157		      kref_read(&io_req->refcount));
1158
1159	/* Hold IO request across abort processing */
1160	kref_get(&io_req->refcount);
1161
1162	BUG_ON(tgt != io_req->tgt);
1163
1164	/* Remove the io_req from the active_q. */
1165	/*
1166	 * Task Mgmt functions (LUN RESET & TGT RESET) will not
1167	 * issue an ABTS on this particular IO req, as the
1168	 * io_req is no longer in the active_q.
1169	 */
1170	if (tgt->flush_in_prog) {
1171		printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1172			"flush in progress\n", io_req->xid);
1173		kref_put(&io_req->refcount, bnx2fc_cmd_release);
1174		spin_unlock_bh(&tgt->tgt_lock);
1175		return SUCCESS;
1176	}
1177
1178	if (io_req->on_active_queue == 0) {
1179		printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1180				"not on active_q\n", io_req->xid);
1181		/*
1182		 * The IO is still with the FW.
1183		 * Return failure and let SCSI-ml retry eh_abort.
1184		 */
1185		spin_unlock_bh(&tgt->tgt_lock);
1186		return FAILED;
1187	}
1188
1189	/*
1190	 * Only eh_abort processing will remove the IO from
1191	 * active_cmd_q before processing the request. this is
1192	 * done to avoid race conditions between IOs aborted
1193	 * as part of task management completion and eh_abort
1194	 * processing
1195	 */
1196	list_del_init(&io_req->link);
1197	io_req->on_active_queue = 0;
1198	/* Move IO req to retire queue */
1199	list_add_tail(&io_req->link, &tgt->io_retire_queue);
1200
1201	init_completion(&io_req->abts_done);
1202	init_completion(&io_req->cleanup_done);
1203
1204	if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
1205		printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
1206				"already in abts processing\n", io_req->xid);
1207		if (cancel_delayed_work(&io_req->timeout_work))
1208			kref_put(&io_req->refcount,
1209				 bnx2fc_cmd_release); /* drop timer hold */
1210		/*
1211		 * We don't want to hold off the upper layer timer so simply
1212		 * cleanup the command and return that I/O was successfully
1213		 * aborted.
1214		 */
1215		rc = bnx2fc_abts_cleanup(io_req);
1216		/* This only occurs when an task abort was requested while ABTS
1217		   is in progress.  Setting the IO_CLEANUP flag will skip the
1218		   RRQ process in the case when the fw generated SCSI_CMD cmpl
1219		   was a result from the ABTS request rather than the CLEANUP
1220		   request */
1221		set_bit(BNX2FC_FLAG_IO_CLEANUP,	&io_req->req_flags);
1222		goto done;
1223	}
1224
1225	/* Cancel the current timer running on this io_req */
1226	if (cancel_delayed_work(&io_req->timeout_work))
1227		kref_put(&io_req->refcount,
1228			 bnx2fc_cmd_release); /* drop timer hold */
1229	set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
1230	io_req->wait_for_abts_comp = 1;
1231	rc = bnx2fc_initiate_abts(io_req);
1232	if (rc == FAILED) {
1233		io_req->wait_for_cleanup_comp = 1;
1234		bnx2fc_initiate_cleanup(io_req);
1235		spin_unlock_bh(&tgt->tgt_lock);
1236		wait_for_completion(&io_req->cleanup_done);
1237		spin_lock_bh(&tgt->tgt_lock);
1238		io_req->wait_for_cleanup_comp = 0;
1239		goto done;
1240	}
1241	spin_unlock_bh(&tgt->tgt_lock);
1242
1243	/* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */
1244	time_left = wait_for_completion_timeout(&io_req->abts_done,
1245					msecs_to_jiffies(2 * rp->r_a_tov + 1));
1246	if (time_left)
1247		BNX2FC_IO_DBG(io_req,
1248			      "Timed out in eh_abort waiting for abts_done");
1249
1250	spin_lock_bh(&tgt->tgt_lock);
1251	io_req->wait_for_abts_comp = 0;
1252	if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
1253		BNX2FC_IO_DBG(io_req, "IO completed in a different context\n");
1254		rc = SUCCESS;
1255	} else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1256				      &io_req->req_flags))) {
1257		/* Let the scsi-ml try to recover this command */
1258		printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
1259		       io_req->xid);
1260		/*
1261		 * Cleanup firmware residuals before returning control back
1262		 * to SCSI ML.
1263		 */
1264		rc = bnx2fc_abts_cleanup(io_req);
1265		goto done;
1266	} else {
1267		/*
1268		 * We come here even when there was a race condition
1269		 * between timeout and abts completion, and abts
1270		 * completion happens just in time.
1271		 */
1272		BNX2FC_IO_DBG(io_req, "abort succeeded\n");
1273		rc = SUCCESS;
1274		bnx2fc_scsi_done(io_req, DID_ABORT);
1275		kref_put(&io_req->refcount, bnx2fc_cmd_release);
1276	}
1277done:
1278	/* release the reference taken in eh_abort */
1279	kref_put(&io_req->refcount, bnx2fc_cmd_release);
1280	spin_unlock_bh(&tgt->tgt_lock);
1281	return rc;
1282}
1283
1284void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,
1285				      struct fcoe_task_ctx_entry *task,
1286				      u8 rx_state)
1287{
1288	struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;
1289	struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;
1290	u32 offset = cb_arg->offset;
1291	enum fc_rctl r_ctl = cb_arg->r_ctl;
1292	int rc = 0;
1293	struct bnx2fc_rport *tgt = orig_io_req->tgt;
1294
1295	BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"
1296			      "cmd_type = %d\n",
1297		   seq_clnp_req->xid, seq_clnp_req->cmd_type);
1298
1299	if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {
1300		printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",
1301			seq_clnp_req->xid);
1302		goto free_cb_arg;
1303	}
1304
1305	spin_unlock_bh(&tgt->tgt_lock);
1306	rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
1307	spin_lock_bh(&tgt->tgt_lock);
1308
1309	if (rc)
1310		printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"
1311			" IO will abort\n");
1312	seq_clnp_req->cb_arg = NULL;
1313	kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
1314free_cb_arg:
1315	kfree(cb_arg);
1316	return;
1317}
1318
1319void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
1320				  struct fcoe_task_ctx_entry *task,
1321				  u8 num_rq)
1322{
1323	BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
1324			      "refcnt = %d, cmd_type = %d\n",
1325		   kref_read(&io_req->refcount), io_req->cmd_type);
1326	/*
1327	 * Test whether there is a cleanup request pending. If not just
1328	 * exit.
1329	 */
1330	if (!test_and_clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ,
1331				&io_req->req_flags))
1332		return;
1333	/*
1334	 * If we receive a cleanup completion for this request then the
1335	 * firmware will not give us an abort completion for this request
1336	 * so clear any ABTS pending flags.
1337	 */
1338	if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags) &&
1339	    !test_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags)) {
1340		set_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags);
1341		if (io_req->wait_for_abts_comp)
1342			complete(&io_req->abts_done);
1343	}
1344
1345	bnx2fc_scsi_done(io_req, DID_ERROR);
1346	kref_put(&io_req->refcount, bnx2fc_cmd_release);
1347	if (io_req->wait_for_cleanup_comp)
1348		complete(&io_req->cleanup_done);
1349}
1350
1351void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
1352			       struct fcoe_task_ctx_entry *task,
1353			       u8 num_rq)
1354{
1355	u32 r_ctl;
1356	u32 r_a_tov = FC_DEF_R_A_TOV;
1357	u8 issue_rrq = 0;
1358	struct bnx2fc_rport *tgt = io_req->tgt;
1359
1360	BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
1361			      "refcnt = %d, cmd_type = %d\n",
1362		   io_req->xid,
1363		   kref_read(&io_req->refcount), io_req->cmd_type);
1364
1365	if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
1366				       &io_req->req_flags)) {
1367		BNX2FC_IO_DBG(io_req, "Timer context finished processing"
1368				" this io\n");
1369		return;
1370	}
1371
1372	/*
1373	 * If we receive an ABTS completion here then we will not receive
1374	 * a cleanup completion so clear any cleanup pending flags.
1375	 */
1376	if (test_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags)) {
1377		clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags);
1378		if (io_req->wait_for_cleanup_comp)
1379			complete(&io_req->cleanup_done);
1380	}
1381
1382	/* Do not issue RRQ as this IO is already cleanedup */
1383	if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
1384				&io_req->req_flags))
1385		goto io_compl;
1386
1387	/*
1388	 * For ABTS issued due to SCSI eh_abort_handler, timeout
1389	 * values are maintained by scsi-ml itself. Cancel timeout
1390	 * in case ABTS issued as part of task management function
1391	 * or due to FW error.
1392	 */
1393	if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
1394		if (cancel_delayed_work(&io_req->timeout_work))
1395			kref_put(&io_req->refcount,
1396				 bnx2fc_cmd_release); /* drop timer hold */
1397
1398	r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;
1399
1400	switch (r_ctl) {
1401	case FC_RCTL_BA_ACC:
1402		/*
1403		 * Dont release this cmd yet. It will be relesed
1404		 * after we get RRQ response
1405		 */
1406		BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
1407		issue_rrq = 1;
1408		break;
1409
1410	case FC_RCTL_BA_RJT:
1411		BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
1412		break;
1413	default:
1414		printk(KERN_ERR PFX "Unknown ABTS response\n");
1415		break;
1416	}
1417
1418	if (issue_rrq) {
1419		BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
1420		set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
1421	}
1422	set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
1423	bnx2fc_cmd_timer_set(io_req, r_a_tov);
1424
1425io_compl:
1426	if (io_req->wait_for_abts_comp) {
1427		if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
1428				       &io_req->req_flags))
1429			complete(&io_req->abts_done);
1430	} else {
1431		/*
1432		 * We end up here when ABTS is issued as
1433		 * in asynchronous context, i.e., as part
1434		 * of task management completion, or
1435		 * when FW error is received or when the
1436		 * ABTS is issued when the IO is timed
1437		 * out.
1438		 */
1439
1440		if (io_req->on_active_queue) {
1441			list_del_init(&io_req->link);
1442			io_req->on_active_queue = 0;
1443			/* Move IO req to retire queue */
1444			list_add_tail(&io_req->link, &tgt->io_retire_queue);
1445		}
1446		bnx2fc_scsi_done(io_req, DID_ERROR);
1447		kref_put(&io_req->refcount, bnx2fc_cmd_release);
1448	}
1449}
1450
1451static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
1452{
1453	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1454	struct bnx2fc_rport *tgt = io_req->tgt;
1455	struct bnx2fc_cmd *cmd, *tmp;
1456	u64 tm_lun = sc_cmd->device->lun;
1457	u64 lun;
1458	int rc = 0;
1459
1460	/* called with tgt_lock held */
1461	BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
1462	/*
1463	 * Walk thru the active_ios queue and ABORT the IO
1464	 * that matches with the LUN that was reset
1465	 */
1466	list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1467		BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
1468		lun = cmd->sc_cmd->device->lun;
1469		if (lun == tm_lun) {
1470			/* Initiate ABTS on this cmd */
1471			if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1472					      &cmd->req_flags)) {
1473				/* cancel the IO timeout */
1474				if (cancel_delayed_work(&io_req->timeout_work))
1475					kref_put(&io_req->refcount,
1476						 bnx2fc_cmd_release);
1477							/* timer hold */
1478				rc = bnx2fc_initiate_abts(cmd);
1479				/* abts shouldn't fail in this context */
1480				WARN_ON(rc != SUCCESS);
1481			} else
1482				printk(KERN_ERR PFX "lun_rst: abts already in"
1483					" progress for this IO 0x%x\n",
1484					cmd->xid);
1485		}
1486	}
1487}
1488
1489static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
1490{
1491	struct bnx2fc_rport *tgt = io_req->tgt;
1492	struct bnx2fc_cmd *cmd, *tmp;
1493	int rc = 0;
1494
1495	/* called with tgt_lock held */
1496	BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
1497	/*
1498	 * Walk thru the active_ios queue and ABORT the IO
1499	 * that matches with the LUN that was reset
1500	 */
1501	list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
1502		BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
1503		/* Initiate ABTS */
1504		if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
1505							&cmd->req_flags)) {
1506			/* cancel the IO timeout */
1507			if (cancel_delayed_work(&io_req->timeout_work))
1508				kref_put(&io_req->refcount,
1509					 bnx2fc_cmd_release); /* timer hold */
1510			rc = bnx2fc_initiate_abts(cmd);
1511			/* abts shouldn't fail in this context */
1512			WARN_ON(rc != SUCCESS);
1513
1514		} else
1515			printk(KERN_ERR PFX "tgt_rst: abts already in progress"
1516				" for this IO 0x%x\n", cmd->xid);
1517	}
1518}
1519
1520void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
1521			     struct fcoe_task_ctx_entry *task, u8 num_rq,
1522				  unsigned char *rq_data)
1523{
1524	struct bnx2fc_mp_req *tm_req;
1525	struct fc_frame_header *fc_hdr;
1526	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1527	u64 *hdr;
1528	u64 *temp_hdr;
1529	void *rsp_buf;
1530
1531	/* Called with tgt_lock held */
1532	BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
1533
1534	if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
1535		set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
1536	else {
1537		/* TM has already timed out and we got
1538		 * delayed completion. Ignore completion
1539		 * processing.
1540		 */
1541		return;
1542	}
1543
1544	tm_req = &(io_req->mp_req);
1545	fc_hdr = &(tm_req->resp_fc_hdr);
1546	hdr = (u64 *)fc_hdr;
1547	temp_hdr = (u64 *)
1548		&task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;
1549	hdr[0] = cpu_to_be64(temp_hdr[0]);
1550	hdr[1] = cpu_to_be64(temp_hdr[1]);
1551	hdr[2] = cpu_to_be64(temp_hdr[2]);
1552
1553	tm_req->resp_len =
1554		task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;
1555
1556	rsp_buf = tm_req->resp_buf;
1557
1558	if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
1559		bnx2fc_parse_fcp_rsp(io_req,
1560				     (struct fcoe_fcp_rsp_payload *)
1561				     rsp_buf, num_rq, rq_data);
1562		if (io_req->fcp_rsp_code == 0) {
1563			/* TM successful */
1564			if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
1565				bnx2fc_lun_reset_cmpl(io_req);
1566			else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
1567				bnx2fc_tgt_reset_cmpl(io_req);
1568		}
1569	} else {
1570		printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
1571			fc_hdr->fh_r_ctl);
1572	}
1573	if (!sc_cmd->SCp.ptr) {
1574		printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n");
1575		return;
1576	}
1577	switch (io_req->fcp_status) {
1578	case FC_GOOD:
1579		if (io_req->cdb_status == 0) {
1580			/* Good IO completion */
1581			sc_cmd->result = DID_OK << 16;
1582		} else {
1583			/* Transport status is good, SCSI status not good */
1584			sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
1585		}
1586		if (io_req->fcp_resid)
1587			scsi_set_resid(sc_cmd, io_req->fcp_resid);
1588		break;
1589
1590	default:
1591		BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
1592			   io_req->fcp_status);
1593		break;
1594	}
1595
1596	sc_cmd = io_req->sc_cmd;
1597	io_req->sc_cmd = NULL;
1598
1599	/* check if the io_req exists in tgt's tmf_q */
1600	if (io_req->on_tmf_queue) {
1601
1602		list_del_init(&io_req->link);
1603		io_req->on_tmf_queue = 0;
1604	} else {
1605
1606		printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");
1607		return;
1608	}
1609
1610	sc_cmd->SCp.ptr = NULL;
1611	sc_cmd->scsi_done(sc_cmd);
1612
1613	kref_put(&io_req->refcount, bnx2fc_cmd_release);
1614	if (io_req->wait_for_abts_comp) {
1615		BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
1616		complete(&io_req->abts_done);
1617	}
1618}
1619
1620static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
1621			   int bd_index)
1622{
1623	struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1624	int frag_size, sg_frags;
1625
1626	sg_frags = 0;
1627	while (sg_len) {
1628		if (sg_len >= BNX2FC_BD_SPLIT_SZ)
1629			frag_size = BNX2FC_BD_SPLIT_SZ;
1630		else
1631			frag_size = sg_len;
1632		bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
1633		bd[bd_index + sg_frags].buf_addr_hi  = addr >> 32;
1634		bd[bd_index + sg_frags].buf_len = (u16)frag_size;
1635		bd[bd_index + sg_frags].flags = 0;
1636
1637		addr += (u64) frag_size;
1638		sg_frags++;
1639		sg_len -= frag_size;
1640	}
1641	return sg_frags;
1642
1643}
1644
1645static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
1646{
1647	struct bnx2fc_interface *interface = io_req->port->priv;
1648	struct bnx2fc_hba *hba = interface->hba;
1649	struct scsi_cmnd *sc = io_req->sc_cmd;
1650	struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1651	struct scatterlist *sg;
1652	int byte_count = 0;
1653	int sg_count = 0;
1654	int bd_count = 0;
1655	int sg_frags;
1656	unsigned int sg_len;
1657	u64 addr;
1658	int i;
1659
1660	WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD);
1661	/*
1662	 * Use dma_map_sg directly to ensure we're using the correct
1663	 * dev struct off of pcidev.
1664	 */
1665	sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),
1666			      scsi_sg_count(sc), sc->sc_data_direction);
1667	scsi_for_each_sg(sc, sg, sg_count, i) {
1668		sg_len = sg_dma_len(sg);
1669		addr = sg_dma_address(sg);
1670		if (sg_len > BNX2FC_MAX_BD_LEN) {
1671			sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
1672						   bd_count);
1673		} else {
1674
1675			sg_frags = 1;
1676			bd[bd_count].buf_addr_lo = addr & 0xffffffff;
1677			bd[bd_count].buf_addr_hi  = addr >> 32;
1678			bd[bd_count].buf_len = (u16)sg_len;
1679			bd[bd_count].flags = 0;
1680		}
1681		bd_count += sg_frags;
1682		byte_count += sg_len;
1683	}
1684	if (byte_count != scsi_bufflen(sc))
1685		printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
1686			"task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
1687			io_req->xid);
1688	return bd_count;
1689}
1690
1691static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
1692{
1693	struct scsi_cmnd *sc = io_req->sc_cmd;
1694	struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
1695	int bd_count;
1696
1697	if (scsi_sg_count(sc)) {
1698		bd_count = bnx2fc_map_sg(io_req);
1699		if (bd_count == 0)
1700			return -ENOMEM;
1701	} else {
1702		bd_count = 0;
1703		bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
1704		bd[0].buf_len = bd[0].flags = 0;
1705	}
1706	io_req->bd_tbl->bd_valid = bd_count;
1707
1708	/*
1709	 * Return the command to ML if BD count exceeds the max number
1710	 * that can be handled by FW.
1711	 */
1712	if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) {
1713		pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n",
1714		       bd_count, io_req->xid);
1715		return -ENOMEM;
1716	}
1717
1718	return 0;
1719}
1720
1721static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
1722{
1723	struct scsi_cmnd *sc = io_req->sc_cmd;
1724	struct bnx2fc_interface *interface = io_req->port->priv;
1725	struct bnx2fc_hba *hba = interface->hba;
1726
1727	/*
1728	 * Use dma_unmap_sg directly to ensure we're using the correct
1729	 * dev struct off of pcidev.
1730	 */
1731	if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {
1732		dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc),
1733		    scsi_sg_count(sc), sc->sc_data_direction);
1734		io_req->bd_tbl->bd_valid = 0;
1735	}
1736}
1737
1738void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
1739				  struct fcp_cmnd *fcp_cmnd)
1740{
1741	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1742
1743	memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
1744
1745	int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun);
1746
1747	fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
1748	memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
1749
1750	fcp_cmnd->fc_cmdref = 0;
1751	fcp_cmnd->fc_pri_ta = 0;
1752	fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
1753	fcp_cmnd->fc_flags = io_req->io_req_flags;
1754	fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
1755}
1756
1757static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
1758				 struct fcoe_fcp_rsp_payload *fcp_rsp,
1759				 u8 num_rq, unsigned char *rq_data)
1760{
1761	struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
1762	u8 rsp_flags = fcp_rsp->fcp_flags.flags;
1763	u32 rq_buff_len = 0;
1764	int fcp_sns_len = 0;
1765	int fcp_rsp_len = 0;
1766
1767	io_req->fcp_status = FC_GOOD;
1768	io_req->fcp_resid = 0;
1769	if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |
1770	    FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))
1771		io_req->fcp_resid = fcp_rsp->fcp_resid;
1772
1773	io_req->scsi_comp_flags = rsp_flags;
1774	CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
1775				fcp_rsp->scsi_status_code;
1776
1777	/* Fetch fcp_rsp_info and fcp_sns_info if available */
1778	if (num_rq) {
1779
1780		/*
1781		 * We do not anticipate num_rq >1, as the linux defined
1782		 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
1783		 * 256 bytes of single rq buffer is good enough to hold this.
1784		 */
1785
1786		if (rsp_flags &
1787		    FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
1788			fcp_rsp_len = rq_buff_len
1789					= fcp_rsp->fcp_rsp_len;
1790		}
1791
1792		if (rsp_flags &
1793		    FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
1794			fcp_sns_len = fcp_rsp->fcp_sns_len;
1795			rq_buff_len += fcp_rsp->fcp_sns_len;
1796		}
1797
1798		io_req->fcp_rsp_len = fcp_rsp_len;
1799		io_req->fcp_sns_len = fcp_sns_len;
1800
1801		if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
1802			/* Invalid sense sense length. */
1803			printk(KERN_ERR PFX "invalid sns length %d\n",
1804				rq_buff_len);
1805			/* reset rq_buff_len */
1806			rq_buff_len =  num_rq * BNX2FC_RQ_BUF_SZ;
1807		}
1808
1809		/* fetch fcp_rsp_code */
1810		if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
1811			/* Only for task management function */
1812			io_req->fcp_rsp_code = rq_data[3];
1813			BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n",
1814				io_req->fcp_rsp_

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