qla_target.c 194.6 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12
/*
 *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
 *
 *  based on qla2x00t.c code:
 *
 *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
 *  Copyright (C) 2004 - 2005 Leonid Stoljar
 *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
 *  Copyright (C) 2006 - 2010 ID7 Ltd.
 *
 *  Forward port and refactoring to modern qla2xxx and target/configfs
 *
13
 *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation, version 2
 *  of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/workqueue.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>

#include "qla_def.h"
#include "qla_target.h"

45 46 47 48 49
static int ql2xtgt_tape_enable;
module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xtgt_tape_enable,
		"Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");

50 51 52 53 54 55 56 57
static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
module_param(qlini_mode, charp, S_IRUGO);
MODULE_PARM_DESC(qlini_mode,
	"Determines when initiator mode will be enabled. Possible values: "
	"\"exclusive\" - initiator mode will be enabled on load, "
	"disabled on enabling target mode and then on disabling target mode "
	"enabled back; "
	"\"disabled\" - initiator mode will never be enabled; "
58 59
	"\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
	"when ready "
60 61
	"\"enabled\" (default) - initiator mode will always stay enabled.");

62
static int ql_dm_tgt_ex_pct = 0;
63 64 65 66 67 68
module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
	"For Dual Mode (qlini_mode=dual), this parameter determines "
	"the percentage of exchanges/cmds FW will allocate resources "
	"for Target mode.");

69 70 71 72 73 74 75
int ql2xuctrlirq = 1;
module_param(ql2xuctrlirq, int, 0644);
MODULE_PARM_DESC(ql2xuctrlirq,
    "User to control IRQ placement via smp_affinity."
    "Valid with qlini_mode=disabled."
    "1(default): enable");

76
int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
77

78 79
static int qla_sam_status = SAM_STAT_BUSY;
static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
80

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
/*
 * From scsi/fc/fc_fcp.h
 */
enum fcp_resp_rsp_codes {
	FCP_TMF_CMPL = 0,
	FCP_DATA_LEN_INVALID = 1,
	FCP_CMND_FIELDS_INVALID = 2,
	FCP_DATA_PARAM_MISMATCH = 3,
	FCP_TMF_REJECTED = 4,
	FCP_TMF_FAILED = 5,
	FCP_TMF_INVALID_LUN = 9,
};

/*
 * fc_pri_ta from scsi/fc/fc_fcp.h
 */
#define FCP_PTA_SIMPLE      0   /* simple task attribute */
#define FCP_PTA_HEADQ       1   /* head of queue task attribute */
#define FCP_PTA_ORDERED     2   /* ordered task attribute */
100
#define FCP_PTA_ACA         4   /* auto. contingent allegiance */
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119
#define FCP_PTA_MASK        7   /* mask for task attribute field */
#define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
#define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */

/*
 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 * must be called under HW lock and could unlock/lock it inside.
 * It isn't an issue, since in the current implementation on the time when
 * those functions are called:
 *
 *   - Either context is IRQ and only IRQ handler can modify HW data,
 *     including rings related fields,
 *
 *   - Or access to target mode variables from struct qla_tgt doesn't
 *     cross those functions boundaries, except tgt_stop, which
 *     additionally protected by irq_cmd_count.
 */
/* Predefs for callbacks handed to qla2xxx LLD */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
120
	struct atio_from_isp *pkt, uint8_t);
121 122
static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
	response_t *pkt);
123
static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
124
	int fn, void *iocb, int flags);
125
static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
126
	*cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
127 128
static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
	struct atio_from_isp *atio, uint16_t status, int qfull);
129
static void qlt_disable_vha(struct scsi_qla_host *vha);
130
static void qlt_clear_tgt_db(struct qla_tgt *tgt);
131
static void qlt_send_notify_ack(struct qla_qpair *qpair,
132 133 134
	struct imm_ntfy_from_isp *ntfy,
	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
135 136
static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *imm, int ha_locked);
137 138 139
static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
	fc_port_t *fcport, bool local);
void qlt_unreg_sess(struct fc_port *sess);
140 141
static void qlt_24xx_handle_abts(struct scsi_qla_host *,
	struct abts_recv_from_24xx *);
142 143
static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
    uint16_t);
144

145 146 147 148
/*
 * Global Variables
 */
static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
149
struct kmem_cache *qla_tgt_plogi_cachep;
150 151 152 153 154
static mempool_t *qla_tgt_mgmt_cmd_mempool;
static struct workqueue_struct *qla_tgt_wq;
static DEFINE_MUTEX(qla_tgt_mutex);
static LIST_HEAD(qla_tgt_glist);

155 156 157 158 159 160 161 162 163 164 165 166 167 168
static const char *prot_op_str(u32 prot_op)
{
	switch (prot_op) {
	case TARGET_PROT_NORMAL:	return "NORMAL";
	case TARGET_PROT_DIN_INSERT:	return "DIN_INSERT";
	case TARGET_PROT_DOUT_INSERT:	return "DOUT_INSERT";
	case TARGET_PROT_DIN_STRIP:	return "DIN_STRIP";
	case TARGET_PROT_DOUT_STRIP:	return "DOUT_STRIP";
	case TARGET_PROT_DIN_PASS:	return "DIN_PASS";
	case TARGET_PROT_DOUT_PASS:	return "DOUT_PASS";
	default:			return "UNKNOWN";
	}
}

169 170 171 172 173 174 175 176 177 178
/* This API intentionally takes dest as a parameter, rather than returning
 * int value to avoid caller forgetting to issue wmb() after the store */
void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
{
	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
	*dest = atomic_inc_return(&base_vha->generation_tick);
	/* memory barrier */
	wmb();
}

179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198
/* Might release hw lock, then reaquire!! */
static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
{
	/* Send marker if required */
	if (unlikely(vha->marker_needed != 0)) {
		int rc = qla2x00_issue_marker(vha, vha_locked);
		if (rc != QLA_SUCCESS) {
			ql_dbg(ql_dbg_tgt, vha, 0xe03d,
			    "qla_target(%d): issue_marker() failed\n",
			    vha->vp_idx);
		}
		return rc;
	}
	return QLA_SUCCESS;
}

static inline
struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
	uint8_t *d_id)
{
199 200
	struct scsi_qla_host *host;
	uint32_t key = 0;
201

202 203
	if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
	    (vha->d_id.b.al_pa == d_id[2]))
204 205
		return vha;

206 207 208
	key  = (uint32_t)d_id[0] << 16;
	key |= (uint32_t)d_id[1] <<  8;
	key |= (uint32_t)d_id[2];
209

210 211
	host = btree_lookup32(&vha->hw->tgt.host_map, key);
	if (!host)
212
		ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
213
		    "Unable to find host %06x\n", key);
214 215

	return host;
216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233
}

static inline
struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
	uint16_t vp_idx)
{
	struct qla_hw_data *ha = vha->hw;

	if (vha->vp_idx == vp_idx)
		return vha;

	BUG_ON(ha->tgt.tgt_vp_map == NULL);
	if (likely(test_bit(vp_idx, ha->vp_idx_map)))
		return ha->tgt.tgt_vp_map[vp_idx].vha;

	return NULL;
}

234 235 236 237 238 239 240
static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
{
	unsigned long flags;

	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);

	vha->hw->tgt.num_pend_cmds++;
241 242
	if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
		vha->qla_stats.stat_max_pend_cmds =
243 244 245 246 247 248 249 250 251 252 253 254
			vha->hw->tgt.num_pend_cmds;
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
}
static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
{
	unsigned long flags;

	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
	vha->hw->tgt.num_pend_cmds--;
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
}

255 256

static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
257
	struct atio_from_isp *atio, uint8_t ha_locked)
258 259 260 261 262 263
{
	struct qla_tgt_sess_op *u;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	unsigned long flags;

	if (tgt->tgt_stop) {
264 265 266
		ql_dbg(ql_dbg_async, vha, 0x502c,
		    "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
		    vha->vp_idx);
267 268 269 270
		goto out_term;
	}

	u = kzalloc(sizeof(*u), GFP_ATOMIC);
271
	if (u == NULL)
272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287
		goto out_term;

	u->vha = vha;
	memcpy(&u->atio, atio, sizeof(*atio));
	INIT_LIST_HEAD(&u->cmd_list);

	spin_lock_irqsave(&vha->cmd_list_lock, flags);
	list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);

	schedule_delayed_work(&vha->unknown_atio_work, 1);

out:
	return;

out_term:
288
	qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
289 290 291 292 293 294 295 296 297 298 299 300 301 302
	goto out;
}

static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
	uint8_t ha_locked)
{
	struct qla_tgt_sess_op *u, *t;
	scsi_qla_host_t *host;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	unsigned long flags;
	uint8_t queued = 0;

	list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
		if (u->aborted) {
303 304
			ql_dbg(ql_dbg_async, vha, 0x502e,
			    "Freeing unknown %s %p, because of Abort\n",
305
			    "ATIO_TYPE7", u);
306 307
			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
			    &u->atio, ha_locked, 0);
308 309 310 311 312
			goto abort;
		}

		host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
		if (host != NULL) {
313
			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
314
			    "Requeuing unknown ATIO_TYPE7 %p\n", u);
315 316
			qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
		} else if (tgt->tgt_stop) {
317
			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
318 319
			    "Freeing unknown %s %p, because tgt is being stopped\n",
			    "ATIO_TYPE7", u);
320 321
			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
			    &u->atio, ha_locked, 0);
322
		} else {
323
			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
324
			    "Reschedule u %p, vha %p, host %p\n", u, vha, host);
325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348
			if (!queued) {
				queued = 1;
				schedule_delayed_work(&vha->unknown_atio_work,
				    1);
			}
			continue;
		}

abort:
		spin_lock_irqsave(&vha->cmd_list_lock, flags);
		list_del(&u->cmd_list);
		spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
		kfree(u);
	}
}

void qlt_unknown_atio_work_fn(struct work_struct *work)
{
	struct scsi_qla_host *vha = container_of(to_delayed_work(work),
	    struct scsi_qla_host, unknown_atio_work);

	qlt_try_to_dequeue_unknown_atios(vha, 0);
}

349
static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
350
	struct atio_from_isp *atio, uint8_t ha_locked)
351
{
352 353 354 355 356
	ql_dbg(ql_dbg_tgt, vha, 0xe072,
		"%s: qla_target(%d): type %x ox_id %04x\n",
		__func__, vha->vp_idx, atio->u.raw.entry_type,
		be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));

357 358 359 360 361 362 363 364 365 366 367 368
	switch (atio->u.raw.entry_type) {
	case ATIO_TYPE7:
	{
		struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
		    atio->u.isp24.fcp_hdr.d_id);
		if (unlikely(NULL == host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe03e,
			    "qla_target(%d): Received ATIO_TYPE7 "
			    "with unknown d_id %x:%x:%x\n", vha->vp_idx,
			    atio->u.isp24.fcp_hdr.d_id[0],
			    atio->u.isp24.fcp_hdr.d_id[1],
			    atio->u.isp24.fcp_hdr.d_id[2]);
369 370 371


			qlt_queue_unknown_atio(vha, atio, ha_locked);
372 373
			break;
		}
374 375 376
		if (unlikely(!list_empty(&vha->unknown_atio_list)))
			qlt_try_to_dequeue_unknown_atios(vha, ha_locked);

377
		qlt_24xx_atio_pkt(host, atio, ha_locked);
378 379 380 381 382 383 384 385 386
		break;
	}

	case IMMED_NOTIFY_TYPE:
	{
		struct scsi_qla_host *host = vha;
		struct imm_ntfy_from_isp *entry =
		    (struct imm_ntfy_from_isp *)atio;

387 388
		qlt_issue_marker(vha, ha_locked);

389 390 391 392 393 394 395 396 397 398 399 400 401
		if ((entry->u.isp24.vp_index != 0xFF) &&
		    (entry->u.isp24.nport_handle != 0xFFFF)) {
			host = qlt_find_host_by_vp_idx(vha,
			    entry->u.isp24.vp_index);
			if (unlikely(!host)) {
				ql_dbg(ql_dbg_tgt, vha, 0xe03f,
				    "qla_target(%d): Received "
				    "ATIO (IMMED_NOTIFY_TYPE) "
				    "with unknown vp_index %d\n",
				    vha->vp_idx, entry->u.isp24.vp_index);
				break;
			}
		}
402
		qlt_24xx_atio_pkt(host, atio, ha_locked);
403 404 405
		break;
	}

406 407 408 409 410 411 412 413 414 415 416
	case VP_RPT_ID_IOCB_TYPE:
		qla24xx_report_id_acquisition(vha,
			(struct vp_rpt_id_entry_24xx *)atio);
		break;

	case ABTS_RECV_24XX:
	{
		struct abts_recv_from_24xx *entry =
			(struct abts_recv_from_24xx *)atio;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
			entry->vp_index);
417 418
		unsigned long flags;

419
		if (unlikely(!host)) {
420
			ql_dbg(ql_dbg_tgt, vha, 0xe00a,
421 422 423 424 425
			    "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
			    "received, with unknown vp_index %d\n",
			    vha->vp_idx, entry->vp_index);
			break;
		}
426 427 428 429 430
		if (!ha_locked)
			spin_lock_irqsave(&host->hw->hardware_lock, flags);
		qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
		if (!ha_locked)
			spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
431 432 433 434 435
		break;
	}

	/* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */

436 437 438 439 440 441 442
	default:
		ql_dbg(ql_dbg_tgt, vha, 0xe040,
		    "qla_target(%d): Received unknown ATIO atio "
		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
		break;
	}

443
	return false;
444 445
}

446 447
void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
	struct rsp_que *rsp, response_t *pkt)
448 449
{
	switch (pkt->entry_type) {
450 451 452 453
	case CTIO_CRC2:
		ql_dbg(ql_dbg_tgt, vha, 0xe073,
			"qla_target(%d):%s: CRC2 Response pkt\n",
			vha->vp_idx, __func__);
454
		/* fall through */
455 456 457 458 459 460 461 462 463 464 465 466
	case CTIO_TYPE7:
	{
		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
		    entry->vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe041,
			    "qla_target(%d): Response pkt (CTIO_TYPE7) "
			    "received, with unknown vp_index %d\n",
			    vha->vp_idx, entry->vp_index);
			break;
		}
467
		qlt_response_pkt(host, rsp, pkt);
468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484
		break;
	}

	case IMMED_NOTIFY_TYPE:
	{
		struct scsi_qla_host *host = vha;
		struct imm_ntfy_from_isp *entry =
		    (struct imm_ntfy_from_isp *)pkt;

		host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe042,
			    "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
			    "received, with unknown vp_index %d\n",
			    vha->vp_idx, entry->u.isp24.vp_index);
			break;
		}
485
		qlt_response_pkt(host, rsp, pkt);
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506
		break;
	}

	case NOTIFY_ACK_TYPE:
	{
		struct scsi_qla_host *host = vha;
		struct nack_to_isp *entry = (struct nack_to_isp *)pkt;

		if (0xFF != entry->u.isp24.vp_index) {
			host = qlt_find_host_by_vp_idx(vha,
			    entry->u.isp24.vp_index);
			if (unlikely(!host)) {
				ql_dbg(ql_dbg_tgt, vha, 0xe043,
				    "qla_target(%d): Response "
				    "pkt (NOTIFY_ACK_TYPE) "
				    "received, with unknown "
				    "vp_index %d\n", vha->vp_idx,
				    entry->u.isp24.vp_index);
				break;
			}
		}
507
		qlt_response_pkt(host, rsp, pkt);
508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523
		break;
	}

	case ABTS_RECV_24XX:
	{
		struct abts_recv_from_24xx *entry =
		    (struct abts_recv_from_24xx *)pkt;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
		    entry->vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe044,
			    "qla_target(%d): Response pkt "
			    "(ABTS_RECV_24XX) received, with unknown "
			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
			break;
		}
524
		qlt_response_pkt(host, rsp, pkt);
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540
		break;
	}

	case ABTS_RESP_24XX:
	{
		struct abts_resp_to_24xx *entry =
		    (struct abts_resp_to_24xx *)pkt;
		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
		    entry->vp_index);
		if (unlikely(!host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe045,
			    "qla_target(%d): Response pkt "
			    "(ABTS_RECV_24XX) received, with unknown "
			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
			break;
		}
541
		qlt_response_pkt(host, rsp, pkt);
542 543 544 545
		break;
	}

	default:
546
		qlt_response_pkt(vha, rsp, pkt);
547 548 549 550 551
		break;
	}

}

552 553 554
/*
 * All qlt_plogi_ack_t operations are protected by hardware_lock
 */
555 556 557 558 559 560 561 562 563 564 565 566 567 568 569
static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
	struct imm_ntfy_from_isp *ntfy, int type)
{
	struct qla_work_evt *e;
	e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
	if (!e)
		return QLA_FUNCTION_FAILED;

	e->u.nack.fcport = fcport;
	e->u.nack.type = type;
	memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
	return qla2x00_post_work(vha, e);
}

static
570
void qla2x00_async_nack_sp_done(void *s, int res)
571 572
{
	struct srb *sp = (struct srb *)s;
573
	struct scsi_qla_host *vha = sp->vha;
574 575
	unsigned long flags;

576 577 578
	ql_dbg(ql_dbg_disc, vha, 0x20f2,
	    "Async done-%s res %x %8phC  type %d\n",
	    sp->name, res, sp->fcport->port_name, sp->type);
579 580 581

	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
	sp->fcport->flags &= ~FCF_ASYNC_SENT;
582
	sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
583 584 585 586 587 588

	switch (sp->type) {
	case SRB_NACK_PLOGI:
		sp->fcport->login_gen++;
		sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
		sp->fcport->logout_on_delete = 1;
589
		sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
590
		sp->fcport->send_els_logo = 0;
591 592 593 594 595
		break;

	case SRB_NACK_PRLI:
		sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
		sp->fcport->deleted = 0;
596
		sp->fcport->send_els_logo = 0;
597 598 599 600 601 602 603

		if (!sp->fcport->login_succ &&
		    !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
			sp->fcport->login_succ = 1;

			vha->fcport_count++;

604 605 606 607 608 609 610 611 612 613 614 615
			ql_dbg(ql_dbg_disc, vha, 0x20f3,
			    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
			    __func__, __LINE__,
			    sp->fcport->port_name,
			    vha->fcport_count);
			sp->fcport->disc_state = DSC_UPD_FCPORT;
			qla24xx_post_upd_fcport_work(vha, sp->fcport);
		} else {
			sp->fcport->login_retry = 0;
			sp->fcport->disc_state = DSC_LOGIN_COMPLETE;
			sp->fcport->deleted = 0;
			sp->fcport->logout_on_delete = 1;
616 617 618 619 620 621 622 623 624 625 626
		}
		break;

	case SRB_NACK_LOGO:
		sp->fcport->login_gen++;
		sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
		qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
		break;
	}
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);

627
	sp->free(sp);
628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644
}

int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
	struct imm_ntfy_from_isp *ntfy, int type)
{
	int rval = QLA_FUNCTION_FAILED;
	srb_t *sp;
	char *c = NULL;

	fcport->flags |= FCF_ASYNC_SENT;
	switch (type) {
	case SRB_NACK_PLOGI:
		fcport->fw_login_state = DSC_LS_PLOGI_PEND;
		c = "PLOGI";
		break;
	case SRB_NACK_PRLI:
		fcport->fw_login_state = DSC_LS_PRLI_PEND;
645
		fcport->deleted = 0;
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660
		c = "PRLI";
		break;
	case SRB_NACK_LOGO:
		fcport->fw_login_state = DSC_LS_LOGO_PEND;
		c = "LOGO";
		break;
	}

	sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
	if (!sp)
		goto done;

	sp->type = type;
	sp->name = "nack";

661
	sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
662 663 664 665 666 667 668 669 670
	qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);

	sp->u.iocb_cmd.u.nack.ntfy = ntfy;
	sp->done = qla2x00_async_nack_sp_done;

	rval = qla2x00_start_sp(sp);
	if (rval != QLA_SUCCESS)
		goto done_free_sp;

671 672 673
	ql_dbg(ql_dbg_disc, vha, 0x20f4,
	    "Async-%s %8phC hndl %x %s\n",
	    sp->name, fcport->port_name, sp->handle, c);
674 675 676 677

	return rval;

done_free_sp:
678
	sp->free(sp);
679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694
done:
	fcport->flags &= ~FCF_ASYNC_SENT;
	return rval;
}

void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
{
	fc_port_t *t;
	unsigned long flags;

	switch (e->u.nack.type) {
	case SRB_NACK_PRLI:
		mutex_lock(&vha->vha_tgt.tgt_mutex);
		t = qlt_create_sess(vha, e->u.nack.fcport, 0);
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
		if (t) {
695
			ql_log(ql_log_info, vha, 0xd034,
696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763
			    "%s create sess success %p", __func__, t);
			spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
			/* create sess has an extra kref */
			vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
			spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
		}
		break;
	}
	qla24xx_async_notify_ack(vha, e->u.nack.fcport,
	    (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
}

void qla24xx_delete_sess_fn(struct work_struct *work)
{
	fc_port_t *fcport = container_of(work, struct fc_port, del_work);
	struct qla_hw_data *ha = fcport->vha->hw;
	unsigned long flags;

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);

	if (fcport->se_sess) {
		ha->tgt.tgt_ops->shutdown_sess(fcport);
		ha->tgt.tgt_ops->put_sess(fcport);
	} else {
		qlt_unreg_sess(fcport);
	}
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
}

/*
 * Called from qla2x00_reg_remote_port()
 */
void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	struct fc_port *sess = fcport;
	unsigned long flags;

	if (!vha->hw->tgt.tgt_ops)
		return;

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	if (tgt->tgt_stop) {
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
		return;
	}

	if (fcport->disc_state == DSC_DELETE_PEND) {
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
		return;
	}

	if (!sess->se_sess) {
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

		mutex_lock(&vha->vha_tgt.tgt_mutex);
		sess = qlt_create_sess(vha, fcport, false);
		mutex_unlock(&vha->vha_tgt.tgt_mutex);

		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	} else {
		if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
			return;
		}

		if (!kref_get_unless_zero(&sess->sess_kref)) {
764
			ql_dbg(ql_dbg_disc, vha, 0x2107,
765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793
			    "%s: kref_get fail sess %8phC \n",
			    __func__, sess->port_name);
			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
			return;
		}

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
		    "qla_target(%u): %ssession for port %8phC "
		    "(loop ID %d) reappeared\n", vha->vp_idx,
		    sess->local ? "local " : "", sess->port_name, sess->loop_id);

		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
		    "Reappeared sess %p\n", sess);

		ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
		    fcport->loop_id,
		    (fcport->flags & FCF_CONF_COMP_SUPPORTED));
	}

	if (sess && sess->local) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
		    "qla_target(%u): local session for "
		    "port %8phC (loop ID %d) became global\n", vha->vp_idx,
		    fcport->port_name, sess->loop_id);
		sess->local = 0;
	}
	ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
}
794 795 796 797 798 799

/*
 * This is a zero-base ref-counting solution, since hardware_lock
 * guarantees that ref_count is not modified concurrently.
 * Upon successful return content of iocb is undefined
 */
800
static struct qlt_plogi_ack_t *
801 802 803
qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
		       struct imm_ntfy_from_isp *iocb)
{
804
	struct qlt_plogi_ack_t *pla;
805 806 807 808

	list_for_each_entry(pla, &vha->plogi_ack_list, list) {
		if (pla->id.b24 == id->b24) {
			qlt_send_term_imm_notif(vha, &pla->iocb, 1);
809
			memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
810 811 812 813 814 815 816 817 818 819 820 821
			return pla;
		}
	}

	pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
	if (!pla) {
		ql_dbg(ql_dbg_async, vha, 0x5088,
		       "qla_target(%d): Allocation of plogi_ack failed\n",
		       vha->vp_idx);
		return NULL;
	}

822
	memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
823 824 825 826 827 828
	pla->id = *id;
	list_add_tail(&pla->list, &vha->plogi_ack_list);

	return pla;
}

829
void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
830
    struct qlt_plogi_ack_t *pla)
831
{
832
	struct imm_ntfy_from_isp *iocb = &pla->iocb;
833 834 835 836
	port_id_t port_id;
	uint16_t loop_id;
	fc_port_t *fcport = pla->fcport;

837 838 839 840 841 842
	BUG_ON(!pla->ref_count);
	pla->ref_count--;

	if (pla->ref_count)
		return;

843
	ql_dbg(ql_dbg_disc, vha, 0x5089,
844
	    "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
845 846 847 848 849
	    " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
	    iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
	    iocb->u.isp24.port_id[0],
	    le16_to_cpu(iocb->u.isp24.nport_handle),
	    iocb->u.isp24.exchange_address, iocb->ox_id);
850 851 852 853 854 855 856 857 858 859

	port_id.b.domain = iocb->u.isp24.port_id[2];
	port_id.b.area   = iocb->u.isp24.port_id[1];
	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
	port_id.b.rsvd_1 = 0;

	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);

	fcport->loop_id = loop_id;
	fcport->d_id = port_id;
860 861 862 863
	if (iocb->u.isp24.status_subcode == ELS_PLOGI)
		qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
	else
		qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
864 865 866 867 868 869 870

	list_for_each_entry(fcport, &vha->vp_fcports, list) {
		if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
			fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
		if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
			fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
	}
871 872 873 874 875

	list_del(&pla->list);
	kmem_cache_free(qla_tgt_plogi_cachep, pla);
}

876
void
877 878
qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
    struct fc_port *sess, enum qlt_plogi_link_t link)
879
{
880
	struct imm_ntfy_from_isp *iocb = &pla->iocb;
881 882 883
	/* Inc ref_count first because link might already be pointing at pla */
	pla->ref_count++;

884 885 886 887 888 889 890 891
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
		"Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
		" s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
		sess, link, sess->port_name,
		iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
		pla->ref_count, pla, link);

892 893 894 895 896 897 898 899 900 901 902
	if (link == QLT_PLOGI_LINK_CONFLICT) {
		switch (sess->disc_state) {
		case DSC_DELETED:
		case DSC_DELETE_PEND:
			pla->ref_count--;
			return;
		default:
			break;
		}
	}

903 904 905
	if (sess->plogi_link[link])
		qlt_plogi_ack_unref(vha, sess->plogi_link[link]);

906 907
	if (link == QLT_PLOGI_LINK_SAME_WWN)
		pla->fcport = sess;
908 909 910 911

	sess->plogi_link[link] = pla;
}

912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951
typedef struct {
	/* These fields must be initialized by the caller */
	port_id_t id;
	/*
	 * number of cmds dropped while we were waiting for
	 * initiator to ack LOGO initialize to 1 if LOGO is
	 * triggered by a command, otherwise, to 0
	 */
	int cmd_count;

	/* These fields are used by callee */
	struct list_head list;
} qlt_port_logo_t;

static void
qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
{
	qlt_port_logo_t *tmp;
	int res;

	mutex_lock(&vha->vha_tgt.tgt_mutex);

	list_for_each_entry(tmp, &vha->logo_list, list) {
		if (tmp->id.b24 == logo->id.b24) {
			tmp->cmd_count += logo->cmd_count;
			mutex_unlock(&vha->vha_tgt.tgt_mutex);
			return;
		}
	}

	list_add_tail(&logo->list, &vha->logo_list);

	mutex_unlock(&vha->vha_tgt.tgt_mutex);

	res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);

	mutex_lock(&vha->vha_tgt.tgt_mutex);
	list_del(&logo->list);
	mutex_unlock(&vha->vha_tgt.tgt_mutex);

952 953 954 955
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
	    "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
	    logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
	    logo->cmd_count, res);
956 957
}

958
void qlt_free_session_done(struct work_struct *work)
959
{
960
	struct fc_port *sess = container_of(work, struct fc_port,
961 962 963 964
	    free_work);
	struct qla_tgt *tgt = sess->tgt;
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;
965 966
	unsigned long flags;
	bool logout_started = false;
967
	scsi_qla_host_t *base_vha;
968 969
	struct qlt_plogi_ack_t *own =
		sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
970 971 972

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
		"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
973
		" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
974
		__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
975
		sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
976
		sess->logout_on_delete, sess->keep_nport_handle,
977
		sess->send_els_logo);
978

979
	if (!IS_SW_RESV_ADDR(sess->d_id)) {
980 981
		if (sess->send_els_logo) {
			qlt_port_logo_t logo;
982

983 984
			logo.id = sess->d_id;
			logo.cmd_count = 0;
985
			sess->send_els_logo = 0;
986 987 988
			qlt_send_first_logo(vha, &logo);
		}

989
		if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
990 991
			int rc;

992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
			if (!own ||
			    (own &&
			     (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
				rc = qla2x00_post_async_logout_work(vha, sess,
				    NULL);
				if (rc != QLA_SUCCESS)
					ql_log(ql_log_warn, vha, 0xf085,
					    "Schedule logo failed sess %p rc %d\n",
					    sess, rc);
				else
					logout_started = true;
			} else if (own && (own->iocb.u.isp24.status_subcode ==
				ELS_PRLI) && ha->flags.rida_fmt2) {
				rc = qla2x00_post_async_prlo_work(vha, sess,
				    NULL);
				if (rc != QLA_SUCCESS)
					ql_log(ql_log_warn, vha, 0xf085,
					    "Schedule PRLO failed sess %p rc %d\n",
					    sess, rc);
				else
					logout_started = true;
			}
1014
		}
1015
	}
1016

1017 1018 1019 1020 1021 1022
	/*
	 * Release the target session for FC Nexus from fabric module code.
	 */
	if (sess->se_sess != NULL)
		ha->tgt.tgt_ops->free_session(sess);

1023 1024 1025
	if (logout_started) {
		bool traced = false;

1026
		while (!READ_ONCE(sess->logout_completed)) {
1027 1028 1029 1030 1031 1032 1033 1034 1035
			if (!traced) {
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
					"%s: waiting for sess %p logout\n",
					__func__, sess);
				traced = true;
			}
			msleep(100);
		}

1036
		ql_dbg(ql_dbg_disc, vha, 0xf087,
1037
		    "%s: sess %p logout completed\n", __func__, sess);
1038 1039 1040 1041 1042 1043
	}

	if (sess->logo_ack_needed) {
		sess->logo_ack_needed = 0;
		qla24xx_async_notify_ack(vha, sess,
			(struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1044 1045
	}

1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	if (sess->se_sess) {
		sess->se_sess = NULL;
		if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
			tgt->sess_count--;
	}

	sess->disc_state = DSC_DELETED;
	sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
	sess->deleted = QLA_SESS_DELETED;
	sess->login_retry = vha->hw->login_retry_count;

	if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
		vha->fcport_count--;
		sess->login_succ = 0;
	}

1063
	qla2x00_clear_loop_id(sess);
1064 1065 1066 1067 1068 1069 1070 1071

	if (sess->conflict) {
		sess->conflict->login_pause = 0;
		sess->conflict = NULL;
		if (!test_bit(UNLOADING, &vha->dpc_flags))
			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
	}

1072
	{
1073
		struct qlt_plogi_ack_t *con =
1074
		    sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1075
		struct imm_ntfy_from_isp *iocb;
1076 1077

		if (con) {
1078
			iocb = &con->iocb;
1079
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1080 1081 1082 1083 1084 1085
				 "se_sess %p / sess %p port %8phC is gone,"
				 " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
				 sess->se_sess, sess, sess->port_name,
				 own ? "releasing own PLOGI" : "no own PLOGI pending",
				 own ? own->ref_count : -1,
				 iocb->u.isp24.port_name, con->ref_count);
1086
			qlt_plogi_ack_unref(vha, con);
1087
			sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1088 1089 1090 1091 1092 1093 1094 1095 1096
		} else {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
			    "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
			    sess->se_sess, sess, sess->port_name,
			    own ? "releasing own PLOGI" :
			    "no own PLOGI pending",
			    own ? own->ref_count : -1);
		}

1097 1098
		if (own) {
			sess->fw_login_state = DSC_LS_PLOGI_PEND;
1099
			qlt_plogi_ack_unref(vha, own);
1100 1101
			sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
		}
1102
	}
1103

1104 1105
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

1106
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1107 1108
	    "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
		sess, sess->port_name, vha->fcport_count);
1109

1110
	if (tgt && (tgt->sess_count == 0))
1111
		wake_up_all(&tgt->waitQ);
1112 1113 1114 1115

	if (vha->fcport_count == 0)
		wake_up_all(&vha->fcport_waitQ);

1116
	base_vha = pci_get_drvdata(ha->pdev);
1117 1118 1119

	sess->free_pending = 0;

1120 1121 1122
	if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
		return;

1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134
	if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
		switch (vha->host->active_mode) {
		case MODE_INITIATOR:
		case MODE_DUAL:
			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
			qla2xxx_wake_dpc(vha);
			break;
		case MODE_TARGET:
		default:
			/* no-op */
			break;
		}
1135
	}
1136 1137
}

1138
/* ha->tgt.sess_lock supposed to be held on entry */
1139
void qlt_unreg_sess(struct fc_port *sess)
1140 1141
{
	struct scsi_qla_host *vha = sess->vha;
1142
	unsigned long flags;
1143

1144
	ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1145 1146 1147
	    "%s sess %p for deletion %8phC\n",
	    __func__, sess, sess->port_name);

1148 1149 1150 1151 1152 1153 1154 1155
	spin_lock_irqsave(&sess->vha->work_lock, flags);
	if (sess->free_pending) {
		spin_unlock_irqrestore(&sess->vha->work_lock, flags);
		return;
	}
	sess->free_pending = 1;
	spin_unlock_irqrestore(&sess->vha->work_lock, flags);

1156 1157
	if (sess->se_sess)
		vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1158

1159 1160
	qla2x00_mark_device_lost(vha, sess, 1, 1);

1161
	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1162 1163 1164
	sess->disc_state = DSC_DELETE_PEND;
	sess->last_rscn_gen = sess->rscn_gen;
	sess->last_login_gen = sess->login_gen;
1165

1166 1167 1168
	if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
	    !(sess->nvme_flag & NVME_FLAG_DELETING)) {
		sess->nvme_flag |= NVME_FLAG_DELETING;
1169
		schedule_work(&sess->nvme_del_work);
1170 1171 1172 1173
	} else {
		INIT_WORK(&sess->free_work, qlt_free_session_done);
		schedule_work(&sess->free_work);
	}
1174
}
1175
EXPORT_SYMBOL(qlt_unreg_sess);
1176

1177 1178 1179
static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
{
	struct qla_hw_data *ha = vha->hw;
1180
	struct fc_port *sess = NULL;
1181 1182 1183
	uint16_t loop_id;
	int res = 0;
	struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1184
	unsigned long flags;
1185 1186 1187 1188

	loop_id = le16_to_cpu(n->u.isp24.nport_handle);
	if (loop_id == 0xFFFF) {
		/* Global event */
1189
		atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1190
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1191
		qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1192
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1193
	} else {
1194
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1195
		sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1196
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
	}

	ql_dbg(ql_dbg_tgt, vha, 0xe000,
	    "Using sess for qla_tgt_reset: %p\n", sess);
	if (!sess) {
		res = -ESRCH;
		return res;
	}

	ql_dbg(ql_dbg_tgt, vha, 0xe047,
1207 1208
	    "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
	    "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1209 1210
	    mcmd, loop_id);

1211
	return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1212 1213
}

1214 1215
static void qla24xx_chk_fcp_state(struct fc_port *sess)
{
1216
	if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1217 1218 1219 1220 1221 1222 1223
		sess->logout_on_delete = 0;
		sess->logo_ack_needed = 0;
		sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
		sess->scan_state = 0;
	}
}

1224
void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1225 1226
{
	struct qla_tgt *tgt = sess->tgt;
1227
	struct qla_hw_data *ha = sess->vha->hw;
1228
	unsigned long flags;
1229

1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240
	if (sess->disc_state == DSC_DELETE_PEND)
		return;

	if (sess->disc_state == DSC_DELETED) {
		if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
			wake_up_all(&tgt->waitQ);
		if (sess->vha->fcport_count == 0)
			wake_up_all(&sess->vha->fcport_waitQ);

		if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
			!sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1241 1242
			return;
	}
1243

1244
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1245 1246 1247
	if (sess->deleted == QLA_SESS_DELETED)
		sess->logout_on_delete = 0;

1248
	if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1249
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1250 1251
		return;
	}
1252
	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1253
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1254 1255 1256

	sess->disc_state = DSC_DELETE_PEND;

1257
	qla24xx_chk_fcp_state(sess);
1258

1259 1260
	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
	    "Scheduling sess %p for deletion\n", sess);
1261

1262
	INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1263
	WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1264
}
1265

J
Joern Engel 已提交
1266
static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1267
{
1268 1269
	struct fc_port *sess;
	scsi_qla_host_t *vha = tgt->vha;
1270

1271 1272
	list_for_each_entry(sess, &vha->vp_fcports, list) {
		if (sess->se_sess)
1273
			qlt_schedule_sess_for_deletion(sess);
1274
	}
1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298

	/* At this point tgt could be already dead */
}

static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
	uint16_t *loop_id)
{
	struct qla_hw_data *ha = vha->hw;
	dma_addr_t gid_list_dma;
	struct gid_list_info *gid_list;
	char *id_iter;
	int res, rc, i;
	uint16_t entries;

	gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
	    &gid_list_dma, GFP_KERNEL);
	if (!gid_list) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
		    "qla_target(%d): DMA Alloc failed of %u\n",
		    vha->vp_idx, qla2x00_gid_list_size(ha));
		return -ENOMEM;
	}

	/* Get list of logged in devices */
1299
	rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1300 1301 1302 1303
	if (rc != QLA_SUCCESS) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
		    "qla_target(%d): get_id_list() failed: %x\n",
		    vha->vp_idx, rc);
1304
		res = -EBUSY;
1305 1306 1307 1308
		goto out_free_id_list;
	}

	id_iter = (char *)gid_list;
1309
	res = -ENOENT;
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331
	for (i = 0; i < entries; i++) {
		struct gid_list_info *gid = (struct gid_list_info *)id_iter;
		if ((gid->al_pa == s_id[2]) &&
		    (gid->area == s_id[1]) &&
		    (gid->domain == s_id[0])) {
			*loop_id = le16_to_cpu(gid->loop_id);
			res = 0;
			break;
		}
		id_iter += ha->gid_list_info_size;
	}

out_free_id_list:
	dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
	    gid_list, gid_list_dma);
	return res;
}

/*
 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 * Caller must put it.
 */
1332
static struct fc_port *qlt_create_sess(
1333 1334 1335 1336 1337
	struct scsi_qla_host *vha,
	fc_port_t *fcport,
	bool local)
{
	struct qla_hw_data *ha = vha->hw;
1338
	struct fc_port *sess = fcport;
1339 1340
	unsigned long flags;

1341 1342
	if (vha->vha_tgt.qla_tgt->tgt_stop)
		return NULL;
1343

1344 1345
	if (fcport->se_sess) {
		if (!kref_get_unless_zero(&sess->sess_kref)) {
1346
			ql_dbg(ql_dbg_disc, vha, 0x20f6,
1347 1348 1349
			    "%s: kref_get_unless_zero failed for %8phC\n",
			    __func__, sess->port_name);
			return NULL;
1350
		}
1351
		return fcport;
1352
	}
1353
	sess->tgt = vha->vha_tgt.qla_tgt;
1354
	sess->local = local;
1355

1356 1357
	/*
	 * Under normal circumstances we want to logout from firmware when
1358 1359
	 * session eventually ends and release corresponding nport handle.
	 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1360 1361
	 * code will adjust these flags as necessary.
	 */
1362 1363
	sess->logout_on_delete = 1;
	sess->keep_nport_handle = 0;
1364
	sess->logout_completed = 0;
1365

1366 1367
	if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
	    &fcport->port_name[0], sess) < 0) {
1368
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1369 1370 1371 1372 1373 1374 1375 1376 1377 1378
		    "(%d) %8phC check_initiator_node_acl failed\n",
		    vha->vp_idx, fcport->port_name);
		return NULL;
	} else {
		kref_init(&fcport->sess_kref);
		/*
		 * Take an extra reference to ->sess_kref here to handle
		 * fc_port access across ->tgt.sess_lock reaquire.
		 */
		if (!kref_get_unless_zero(&sess->sess_kref)) {
1379
			ql_dbg(ql_dbg_disc, vha, 0x20f7,
1380 1381 1382 1383
			    "%s: kref_get_unless_zero failed for %8phC\n",
			    __func__, sess->port_name);
			return NULL;
		}
1384

1385 1386 1387
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		if (!IS_SW_RESV_ADDR(sess->d_id))
			vha->vha_tgt.qla_tgt->sess_count++;
1388

1389 1390 1391 1392 1393 1394 1395 1396
		qlt_do_generation_tick(vha, &sess->generation);
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
	}

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
	    "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
	    sess, sess->se_sess, vha->vha_tgt.qla_tgt,
	    vha->vha_tgt.qla_tgt->sess_count);
1397 1398

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1399 1400 1401
	    "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
	    "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
	    vha->vp_idx, local ?  "local " : "", fcport->port_name,
1402 1403
	    fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
	    sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1404 1405 1406 1407

	return sess;
}

1408 1409 1410 1411 1412 1413
/*
 * max_gen - specifies maximum session generation
 * at which this deletion requestion is still valid
 */
void
qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1414
{
1415
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1416
	struct fc_port *sess = fcport;
1417
	unsigned long flags;
1418 1419 1420 1421

	if (!vha->hw->tgt.tgt_ops)
		return;

1422
	if (!tgt)
1423 1424
		return;

1425
	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1426
	if (tgt->tgt_stop) {
1427
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1428 1429
		return;
	}
1430
	if (!sess->se_sess) {
1431
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1432 1433 1434
		return;
	}

1435
	if (max_gen - sess->generation < 0) {
1436
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1437 1438 1439 1440 1441 1442 1443 1444
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
		    "Ignoring stale deletion request for se_sess %p / sess %p"
		    " for port %8phC, req_gen %d, sess_gen %d\n",
		    sess->se_sess, sess, sess->port_name, max_gen,
		    sess->generation);
		return;
	}

1445 1446 1447
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);

	sess->local = 1;
1448
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1449
	qlt_schedule_sess_for_deletion(sess);
1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460
}

static inline int test_tgt_sess_count(struct qla_tgt *tgt)
{
	struct qla_hw_data *ha = tgt->ha;
	unsigned long flags;
	int res;
	/*
	 * We need to protect against race, when tgt is freed before or
	 * inside wake_up()
	 */
1461
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1462
	ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1463 1464
	    "tgt %p, sess_count=%d\n",
	    tgt, tgt->sess_count);
1465
	res = (tgt->sess_count == 0);
1466
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1467 1468 1469 1470 1471

	return res;
}

/* Called by tcm_qla2xxx configfs code */
1472
int qlt_stop_phase1(struct qla_tgt *tgt)
1473 1474 1475 1476 1477
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = tgt->ha;
	unsigned long flags;

1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
	mutex_lock(&qla_tgt_mutex);
	if (!vha->fc_vport) {
		struct Scsi_Host *sh = vha->host;
		struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
		bool npiv_vports;

		spin_lock_irqsave(sh->host_lock, flags);
		npiv_vports = (fc_host->npiv_vports_inuse);
		spin_unlock_irqrestore(sh->host_lock, flags);

		if (npiv_vports) {
			mutex_unlock(&qla_tgt_mutex);
1490 1491
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
			    "NPIV is in use. Can not stop target\n");
1492 1493 1494
			return -EPERM;
		}
	}
1495 1496 1497
	if (tgt->tgt_stop || tgt->tgt_stopped) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
		    "Already in tgt->tgt_stop or tgt_stopped state\n");
1498 1499
		mutex_unlock(&qla_tgt_mutex);
		return -EPERM;
1500 1501
	}

1502
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1503 1504 1505 1506 1507
	    vha->host_no, vha);
	/*
	 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
	 * Lock is needed, because we still can get an incoming packet.
	 */
1508
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1509
	tgt->tgt_stop = 1;
J
Joern Engel 已提交
1510
	qlt_clear_tgt_db(tgt);
1511
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1512
	mutex_unlock(&qla_tgt_mutex);
1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
	    "Waiting for sess works (tgt %p)", tgt);
	spin_lock_irqsave(&tgt->sess_work_lock, flags);
	while (!list_empty(&tgt->sess_works_list)) {
		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
		flush_scheduled_work();
		spin_lock_irqsave(&tgt->sess_work_lock, flags);
	}
	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1525
	    "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1526

1527
	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1528 1529

	/* Big hammer */
1530 1531
	if (!ha->flags.host_shutting_down &&
	    (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1532 1533 1534
		qlt_disable_vha(vha);

	/* Wait for sessions to clear out (just in case) */
1535
	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1536
	return 0;
1537 1538 1539 1540 1541 1542
}
EXPORT_SYMBOL(qlt_stop_phase1);

/* Called by tcm_qla2xxx configfs code */
void qlt_stop_phase2(struct qla_tgt *tgt)
{
1543
	scsi_qla_host_t *vha = tgt->vha;
1544 1545

	if (tgt->tgt_stopped) {
1546
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1547 1548 1549 1550
		    "Already in tgt->tgt_stopped state\n");
		dump_stack();
		return;
	}
1551 1552 1553 1554 1555 1556
	if (!tgt->tgt_stop) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
		    "%s: phase1 stop is not completed\n", __func__);
		dump_stack();
		return;
	}
1557

1558
	mutex_lock(&vha->vha_tgt.tgt_mutex);
1559 1560
	tgt->tgt_stop = 0;
	tgt->tgt_stopped = 1;
1561
	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1562

1563
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1564 1565 1566 1567 1568
	    tgt);
}
EXPORT_SYMBOL(qlt_stop_phase2);

/* Called from qlt_remove_target() -> qla2x00_remove_one() */
1569
static void qlt_release(struct qla_tgt *tgt)
1570
{
1571
	scsi_qla_host_t *vha = tgt->vha;
1572 1573 1574 1575
	void *node;
	u64 key = 0;
	u16 i;
	struct qla_qpair_hint *h;
1576
	struct qla_hw_data *ha = vha->hw;
1577

1578 1579 1580 1581
	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
	    !tgt->tgt_stopped)
		qlt_stop_phase1(tgt);

1582
	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1583 1584
		qlt_stop_phase2(tgt);

1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
	for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
		unsigned long flags;

		h = &tgt->qphints[i];
		if (h->qpair) {
			spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
			list_del(&h->hint_elem);
			spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
			h->qpair = NULL;
		}
	}
	kfree(tgt->qphints);
1597 1598 1599
	mutex_lock(&qla_tgt_mutex);
	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
	mutex_unlock(&qla_tgt_mutex);
1600 1601 1602 1603 1604 1605

	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
		btree_remove64(&tgt->lun_qpair_map, key);

	btree_destroy64(&tgt->lun_qpair_map);

1606 1607 1608 1609 1610
	if (vha->vp_idx)
		if (ha->tgt.tgt_ops &&
		    ha->tgt.tgt_ops->remove_target &&
		    vha->vha_tgt.target_lport_ptr)
			ha->tgt.tgt_ops->remove_target(vha);
1611

1612
	vha->vha_tgt.qla_tgt = NULL;
1613

1614
	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654
	    "Release of tgt %p finished\n", tgt);

	kfree(tgt);
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
	const void *param, unsigned int param_size)
{
	struct qla_tgt_sess_work_param *prm;
	unsigned long flags;

	prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
	if (!prm) {
		ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
		    "qla_target(%d): Unable to create session "
		    "work, command will be refused", 0);
		return -ENOMEM;
	}

	ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
	    "Scheduling work (type %d, prm %p)"
	    " to find session for param %p (size %d, tgt %p)\n",
	    type, prm, param, param_size, tgt);

	prm->type = type;
	memcpy(&prm->tm_iocb, param, param_size);

	spin_lock_irqsave(&tgt->sess_work_lock, flags);
	list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);

	schedule_work(&tgt->sess_work);

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
1655
static void qlt_send_notify_ack(struct qla_qpair *qpair,
1656 1657 1658 1659
	struct imm_ntfy_from_isp *ntfy,
	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
{
1660
	struct scsi_qla_host *vha = qpair->vha;
1661 1662 1663 1664
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	struct nack_to_isp *nack;

1665 1666 1667
	if (!ha->flags.fw_started)
		return;

1668 1669
	ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);

1670
	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1671 1672 1673 1674 1675 1676 1677
	if (!pkt) {
		ql_dbg(ql_dbg_tgt, vha, 0xe049,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", vha->vp_idx, __func__);
		return;
	}

1678 1679
	if (vha->vha_tgt.qla_tgt != NULL)
		vha->vha_tgt.qla_tgt->notify_ack_expected++;
1680 1681 1682 1683 1684 1685 1686

	pkt->entry_type = NOTIFY_ACK_TYPE;
	pkt->entry_count = 1;

	nack = (struct nack_to_isp *)pkt;
	nack->ox_id = ntfy->ox_id;

1687
	nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1688 1689 1690
	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
		nack->u.isp24.flags = ntfy->u.isp24.flags &
1691
			cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1692 1693 1694 1695
	}
	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
	nack->u.isp24.status = ntfy->u.isp24.status;
	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1696
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
	nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
	nack->u.isp24.srr_reject_code = srr_reject_code;
	nack->u.isp24.srr_reject_code_expl = srr_explan;
	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;

	ql_dbg(ql_dbg_tgt, vha, 0xe005,
	    "qla_target(%d): Sending 24xx Notify Ack %d\n",
	    vha->vp_idx, nack->u.isp24.status);

1709 1710
	/* Memory Barrier */
	wmb();
1711
	qla2x00_start_iocbs(vha, qpair->req);
1712 1713 1714 1715 1716
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
1717
static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1718 1719 1720
	struct abts_recv_from_24xx *abts, uint32_t status,
	bool ids_reversed)
{
1721
	struct scsi_qla_host *vha = qpair->vha;
1722 1723 1724 1725 1726 1727 1728 1729 1730
	struct qla_hw_data *ha = vha->hw;
	struct abts_resp_to_24xx *resp;
	uint32_t f_ctl;
	uint8_t *p;

	ql_dbg(ql_dbg_tgt, vha, 0xe006,
	    "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
	    ha, abts, status);

1731 1732
	resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
	    NULL);
1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
	if (!resp) {
		ql_dbg(ql_dbg_tgt, vha, 0xe04a,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet", vha->vp_idx, __func__);
		return;
	}

	resp->entry_type = ABTS_RESP_24XX;
	resp->entry_count = 1;
	resp->nport_handle = abts->nport_handle;
	resp->vp_index = vha->vp_idx;
	resp->sof_type = abts->sof_type;
	resp->exchange_address = abts->exchange_address;
	resp->fcp_hdr_le = abts->fcp_hdr_le;
1747
	f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783
	    F_CTL_LAST_SEQ | F_CTL_END_SEQ |
	    F_CTL_SEQ_INITIATIVE);
	p = (uint8_t *)&f_ctl;
	resp->fcp_hdr_le.f_ctl[0] = *p++;
	resp->fcp_hdr_le.f_ctl[1] = *p++;
	resp->fcp_hdr_le.f_ctl[2] = *p;
	if (ids_reversed) {
		resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
		resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
		resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
		resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
		resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
		resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
	} else {
		resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
		resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
		resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
		resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
		resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
		resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
	}
	resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
	if (status == FCP_TMF_CMPL) {
		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
		resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
		resp->payload.ba_acct.low_seq_cnt = 0x0000;
		resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
		resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
		resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
	} else {
		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
		resp->payload.ba_rjt.reason_code =
			BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
		/* Other bytes are zero */
	}

1784
	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1785

1786 1787
	/* Memory Barrier */
	wmb();
1788 1789 1790 1791
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
	struct abts_resp_from_24xx_fw *entry)
{
	struct ctio7_to_24xx *ctio;

	ql_dbg(ql_dbg_tgt, vha, 0xe007,
	    "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);

1805 1806
	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
	    vha->hw->base_qpair, NULL);
1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822
	if (ctio == NULL) {
		ql_dbg(ql_dbg_tgt, vha, 0xe04b,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", vha->vp_idx, __func__);
		return;
	}

	/*
	 * We've got on entrance firmware's response on by us generated
	 * ABTS response. So, in it ID fields are reversed.
	 */

	ctio->entry_type = CTIO_TYPE7;
	ctio->entry_count = 1;
	ctio->nport_handle = entry->nport_handle;
	ctio->handle = QLA_TGT_SKIP_HANDLE |	CTIO_COMPLETION_HANDLE_MARK;
1823
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1824 1825 1826 1827 1828
	ctio->vp_index = vha->vp_idx;
	ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
	ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
	ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
	ctio->exchange_addr = entry->exchange_addr_to_abort;
1829 1830
	ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
					    CTIO7_FLAGS_TERMINATE);
1831
	ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1832

1833 1834
	/* Memory Barrier */
	wmb();
1835 1836
	qla2x00_start_iocbs(vha, vha->req);

1837 1838
	qlt_24xx_send_abts_resp(vha->hw->base_qpair,
	    (struct abts_recv_from_24xx *)entry,
1839 1840 1841
	    FCP_TMF_CMPL, true);
}

1842 1843 1844 1845
static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;
1846
	unsigned long flags;
1847

1848
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
1849 1850 1851
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		if (tag == op->atio.u.isp24.exchange_addr) {
			op->aborted = true;
1852
			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1853 1854 1855 1856
			return 1;
		}
	}

1857 1858 1859
	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
		if (tag == op->atio.u.isp24.exchange_addr) {
			op->aborted = true;
1860
			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1861 1862 1863 1864
			return 1;
		}
	}

1865 1866
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		if (tag == cmd->atio.u.isp24.exchange_addr) {
1867
			cmd->aborted = 1;
1868
			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1869 1870 1871
			return 1;
		}
	}
1872
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1873 1874 1875 1876 1877 1878 1879 1880 1881 1882

	return 0;
}

/* drop cmds for the given lun
 * XXX only looks for cmds on the port through which lun reset was recieved
 * XXX does not go through the list of other port (which may have cmds
 *     for the same lun)
 */
static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1883
			        u64 lun, uint8_t *s_id)
1884 1885 1886 1887
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;
	uint32_t key;
1888
	unsigned long flags;
1889 1890

	key = sid_to_key(s_id);
1891
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
1892 1893
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		uint32_t op_key;
1894
		u64 op_lun;
1895 1896 1897 1898 1899 1900 1901

		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		op_lun = scsilun_to_int(
			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
		if (op_key == key && op_lun == lun)
			op->aborted = true;
	}
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913

	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
		uint32_t op_key;
		u64 op_lun;

		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		op_lun = scsilun_to_int(
			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
		if (op_key == key && op_lun == lun)
			op->aborted = true;
	}

1914 1915
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		uint32_t cmd_key;
1916
		u64 cmd_lun;
1917 1918 1919 1920 1921

		cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
		cmd_lun = scsilun_to_int(
			(struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
		if (cmd_key == key && cmd_lun == lun)
1922
			cmd->aborted = 1;
1923
	}
1924
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1925 1926
}

1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
    uint64_t unpacked_lun)
{
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	struct qla_qpair_hint *h = NULL;

	if (vha->flags.qpairs_available) {
		h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
		if (!h)
			h = &tgt->qphints[0];
	} else {
		h = &tgt->qphints[0];
	}

	return h;
}

static void qlt_do_tmr_work(struct work_struct *work)
{
	struct qla_tgt_mgmt_cmd *mcmd =
		container_of(work, struct qla_tgt_mgmt_cmd, work);
	struct qla_hw_data *ha = mcmd->vha->hw;
	int rc = EIO;
	uint32_t tag;
	unsigned long flags;

	switch (mcmd->tmr_func) {
	case QLA_TGT_ABTS:
		tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
		break;
	default:
		tag = 0;
		break;
	}

	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
	    mcmd->tmr_func, tag);

	if (rc != 0) {
		spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
		switch (mcmd->tmr_func) {
		case QLA_TGT_ABTS:
			qlt_24xx_send_abts_resp(mcmd->qpair,
			    &mcmd->orig_iocb.abts,
			    FCP_TMF_REJECTED, false);
			break;
		case QLA_TGT_LUN_RESET:
		case QLA_TGT_CLEAR_TS:
		case QLA_TGT_ABORT_TS:
		case QLA_TGT_CLEAR_ACA:
		case QLA_TGT_TARGET_RESET:
			qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
			    qla_sam_status);
			break;

		case QLA_TGT_ABORT_ALL:
		case QLA_TGT_NEXUS_LOSS_SESS:
		case QLA_TGT_NEXUS_LOSS:
			qlt_send_notify_ack(mcmd->qpair,
			    &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
			break;
		}
		spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);

		ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
		    "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
		    mcmd->vha->vp_idx, rc);
		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
	}
}

1998 1999
/* ha->hardware_lock supposed to be held on entry */
static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2000
	struct abts_recv_from_24xx *abts, struct fc_port *sess)
2001 2002 2003
{
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
2004
	struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2005

2006 2007
	if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
		/* send TASK_ABORT response immediately */
2008
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
2009
		return 0;
2010
	}
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
	    "qla_target(%d): task abort (tag=%d)\n",
	    vha->vp_idx, abts->exchange_addr_to_abort);

	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
	if (mcmd == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
		    "qla_target(%d): %s: Allocation of ABORT cmd failed",
		    vha->vp_idx, __func__);
		return -ENOMEM;
	}
	memset(mcmd, 0, sizeof(*mcmd));

	mcmd->sess = sess;
	memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2027
	mcmd->reset_count = ha->base_qpair->chip_reset;
2028
	mcmd->tmr_func = QLA_TGT_ABTS;
2029
	mcmd->qpair = h->qpair;
2030
	mcmd->vha = vha;
2031

2032 2033 2034 2035
	/*
	 * LUN is looked up by target-core internally based on the passed
	 * abts->exchange_addr_to_abort tag.
	 */
2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046
	mcmd->se_cmd.cpuid = h->cpuid;

	if (ha->tgt.tgt_ops->find_cmd_by_tag) {
		struct qla_tgt_cmd *abort_cmd;

		abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
		    abts->exchange_addr_to_abort);
		if (abort_cmd && abort_cmd->qpair) {
			mcmd->qpair = abort_cmd->qpair;
			mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
		}
2047 2048
	}

2049 2050 2051
	INIT_WORK(&mcmd->work, qlt_do_tmr_work);
	queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);

2052 2053 2054 2055 2056 2057 2058 2059 2060 2061
	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
	struct abts_recv_from_24xx *abts)
{
	struct qla_hw_data *ha = vha->hw;
2062
	struct fc_port *sess;
2063 2064 2065
	uint32_t tag = abts->exchange_addr_to_abort;
	uint8_t s_id[3];
	int rc;
2066
	unsigned long flags;
2067 2068 2069 2070 2071

	if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
		    "qla_target(%d): ABTS: Abort Sequence not "
		    "supported\n", vha->vp_idx);
2072 2073
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
2074 2075 2076 2077 2078 2079 2080
		return;
	}

	if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
		    "qla_target(%d): ABTS: Unknown Exchange "
		    "Address received\n", vha->vp_idx);
2081 2082
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095
		return;
	}

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
	    "qla_target(%d): task abort (s_id=%x:%x:%x, "
	    "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
	    abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
	    le32_to_cpu(abts->fcp_hdr_le.parameter));

	s_id[0] = abts->fcp_hdr_le.s_id[2];
	s_id[1] = abts->fcp_hdr_le.s_id[1];
	s_id[2] = abts->fcp_hdr_le.s_id[0];

2096
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2097 2098 2099
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
	if (!sess) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2100
		    "qla_target(%d): task abort for non-existent session\n",
2101
		    vha->vp_idx);
2102 2103
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

2104 2105
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
			    false);
2106 2107
		return;
	}
2108 2109
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

2110

2111
	if (sess->deleted) {
2112 2113
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
2114 2115 2116
		return;
	}

2117 2118 2119 2120 2121
	rc = __qlt_24xx_handle_abts(vha, abts, sess);
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
		    "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
		    vha->vp_idx, rc);
2122 2123
		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
		    false);
2124 2125 2126 2127 2128 2129 2130
		return;
	}
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
2131
static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2132 2133
	struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
{
2134
	struct scsi_qla_host *ha = mcmd->vha;
2135 2136
	struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
	struct ctio7_to_24xx *ctio;
2137
	uint16_t temp;
2138 2139 2140 2141 2142 2143

	ql_dbg(ql_dbg_tgt, ha, 0xe008,
	    "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
	    ha, atio, resp_code);


2144
	ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
	if (ctio == NULL) {
		ql_dbg(ql_dbg_tgt, ha, 0xe04c,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", ha->vp_idx, __func__);
		return;
	}

	ctio->entry_type = CTIO_TYPE7;
	ctio->entry_count = 1;
	ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
	ctio->nport_handle = mcmd->sess->loop_id;
2156
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2157 2158 2159 2160 2161
	ctio->vp_index = ha->vp_idx;
	ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio->exchange_addr = atio->u.isp24.exchange_addr;
2162 2163 2164
	temp = (atio->u.isp24.attr << 9)|
		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
	ctio->u.status1.flags = cpu_to_le16(temp);
2165 2166
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio->u.status1.ox_id = cpu_to_le16(temp);
2167
	ctio->u.status1.scsi_status =
2168 2169
	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
	ctio->u.status1.response_len = cpu_to_le16(8);
2170
	ctio->u.status1.sense_data[0] = resp_code;
2171

2172 2173
	/* Memory Barrier */
	wmb();
2174 2175 2176 2177
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(ha, qpair->req);
2178 2179 2180 2181 2182 2183 2184 2185
}

void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
{
	mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
}
EXPORT_SYMBOL(qlt_free_mcmd);

2186 2187 2188 2189
/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then
 * reacquire
 */
2190
void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2191 2192 2193 2194 2195
    uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
{
	struct atio_from_isp *atio = &cmd->atio;
	struct ctio7_to_24xx *ctio;
	uint16_t temp;
2196
	struct scsi_qla_host *vha = cmd->vha;
2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220

	ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
	    "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
	    "sense_key=%02x, asc=%02x, ascq=%02x",
	    vha, atio, scsi_status, sense_key, asc, ascq);

	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
	if (!ctio) {
		ql_dbg(ql_dbg_async, vha, 0x3067,
		    "qla2x00t(%ld): %s failed: unable to allocate request packet",
		    vha->host_no, __func__);
		goto out;
	}

	ctio->entry_type = CTIO_TYPE7;
	ctio->entry_count = 1;
	ctio->handle = QLA_TGT_SKIP_HANDLE;
	ctio->nport_handle = cmd->sess->loop_id;
	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
	ctio->vp_index = vha->vp_idx;
	ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio->exchange_addr = atio->u.isp24.exchange_addr;
2221 2222 2223
	temp = (atio->u.isp24.attr << 9) |
	    CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
	ctio->u.status1.flags = cpu_to_le16(temp);
2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio->u.status1.ox_id = cpu_to_le16(temp);
	ctio->u.status1.scsi_status =
	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
	ctio->u.status1.response_len = cpu_to_le16(18);
	ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));

	if (ctio->u.status1.residual != 0)
		ctio->u.status1.scsi_status |=
		    cpu_to_le16(SS_RESIDUAL_UNDER);

	/* Response code and sense key */
	put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
	    (&ctio->u.status1.sense_data)[0]);
	/* Additional sense length */
	put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
	/* ASC and ASCQ */
	put_unaligned_le32(((asc << 24) | (ascq << 16)),
	    (&ctio->u.status1.sense_data)[3]);

	/* Memory Barrier */
	wmb();

2247 2248 2249 2250 2251
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);

2252 2253 2254 2255
out:
	return;
}

2256 2257 2258 2259 2260 2261
/* callback from target fabric module code */
void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
{
	struct scsi_qla_host *vha = mcmd->sess->vha;
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;
2262
	struct qla_qpair *qpair = mcmd->qpair;
2263 2264 2265 2266 2267

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
	    "TM response mcmd (%p) status %#x state %#x",
	    mcmd, mcmd->fc_tm_rsp, mcmd->flags);

2268
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2269

2270
	if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2271
		/*
2272
		 * Either the port is not online or this request was from
2273 2274 2275
		 * previous life, just abort the processing.
		 */
		ql_dbg(ql_dbg_async, vha, 0xe100,
2276 2277
			"RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
2278
			mcmd->reset_count, qpair->chip_reset);
2279
		ha->tgt.tgt_ops->free_mcmd(mcmd);
2280
		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2281 2282 2283
		return;
	}

2284 2285
	if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
		if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2286 2287 2288 2289 2290
		    ELS_LOGO ||
		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
		    ELS_PRLO ||
		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
		    ELS_TPRLO) {
2291
			ql_dbg(ql_dbg_disc, vha, 0x2106,
2292 2293 2294
			    "TM response logo %phC status %#x state %#x",
			    mcmd->sess->port_name, mcmd->fc_tm_rsp,
			    mcmd->flags);
2295
			qlt_schedule_sess_for_deletion(mcmd->sess);
2296
		} else {
2297 2298
			qlt_send_notify_ack(vha->hw->base_qpair,
			    &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2299 2300
		}
	} else {
2301
		if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2302
			qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2303 2304
			    mcmd->fc_tm_rsp, false);
		else
2305
			qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316
			    mcmd->fc_tm_rsp);
	}
	/*
	 * Make the callback for ->free_mcmd() to queue_work() and invoke
	 * target_put_sess_cmd() to drop cmd_kref to 1.  The final
	 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
	 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
	 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
	 * qlt_xmit_tm_rsp() returns here..
	 */
	ha->tgt.tgt_ops->free_mcmd(mcmd);
2317
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328
}
EXPORT_SYMBOL(qlt_xmit_tm_rsp);

/* No locks */
static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
{
	struct qla_tgt_cmd *cmd = prm->cmd;

	BUG_ON(cmd->sg_cnt == 0);

	prm->sg = (struct scatterlist *)cmd->sg;
2329
	prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2330 2331 2332 2333 2334 2335
	    cmd->sg_cnt, cmd->dma_data_direction);
	if (unlikely(prm->seg_cnt == 0))
		goto out_err;

	prm->cmd->sg_mapped = 1;

2336 2337 2338 2339 2340
	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
		/*
		 * If greater than four sg entries then we need to allocate
		 * the continuation entries
		 */
2341
		if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2342
			prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2343 2344
			QLA_TGT_DATASEGS_PER_CMD_24XX,
			QLA_TGT_DATASEGS_PER_CONT_24XX);
2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355
	} else {
		/* DIF */
		if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
		    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
			prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
			prm->tot_dsds = prm->seg_cnt;
		} else
			prm->tot_dsds = prm->seg_cnt;

		if (cmd->prot_sg_cnt) {
			prm->prot_sg      = cmd->prot_sg;
2356
			prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371
				cmd->prot_sg, cmd->prot_sg_cnt,
				cmd->dma_data_direction);
			if (unlikely(prm->prot_seg_cnt == 0))
				goto out_err;

			if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
			    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
				/* Dif Bundling not support here */
				prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
								cmd->blk_sz);
				prm->tot_dsds += prm->prot_seg_cnt;
			} else
				prm->tot_dsds += prm->prot_seg_cnt;
		}
	}
2372 2373 2374 2375

	return 0;

out_err:
2376
	ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2377 2378 2379 2380 2381
	    "qla_target(%d): PCI mapping failed: sg_cnt=%d",
	    0, prm->cmd->sg_cnt);
	return -1;
}

J
Joern Engel 已提交
2382
static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2383
{
2384 2385
	struct qla_hw_data *ha;
	struct qla_qpair *qpair;
J
Joern Engel 已提交
2386 2387 2388
	if (!cmd->sg_mapped)
		return;

2389 2390 2391 2392
	qpair = cmd->qpair;

	pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
	    cmd->dma_data_direction);
2393
	cmd->sg_mapped = 0;
2394 2395

	if (cmd->prot_sg_cnt)
2396
		pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2397 2398
			cmd->dma_data_direction);

2399 2400
	if (!cmd->ctx)
		return;
2401
	ha = vha->hw;
2402
	if (cmd->ctx_dsd_alloced)
2403
		qla2x00_clean_dsd_pool(ha, cmd->ctx);
2404

2405
	dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2406 2407
}

2408
static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2409 2410
	uint32_t req_cnt)
{
2411
	uint32_t cnt;
2412
	struct req_que *req = qpair->req;
2413

2414
	if (req->cnt < (req_cnt + 2)) {
2415 2416
		cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
		    RD_REG_DWORD_RELAXED(req->req_q_out));
2417

2418 2419
		if  (req->ring_index < cnt)
			req->cnt = cnt - req->ring_index;
2420
		else
2421
			req->cnt = req->length - (req->ring_index - cnt);
2422

2423
		if (unlikely(req->cnt < (req_cnt + 2)))
2424
			return -EAGAIN;
2425
	}
2426

2427
	req->cnt -= req_cnt;
2428 2429 2430 2431 2432 2433 2434

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
2435
static inline void *qlt_get_req_pkt(struct req_que *req)
2436 2437
{
	/* Adjust ring index. */
2438 2439 2440 2441
	req->ring_index++;
	if (req->ring_index == req->length) {
		req->ring_index = 0;
		req->ring_ptr = req->ring;
2442
	} else {
2443
		req->ring_ptr++;
2444
	}
2445
	return (cont_entry_t *)req->ring_ptr;
2446 2447 2448
}

/* ha->hardware_lock supposed to be held on entry */
2449
static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2450 2451
{
	uint32_t h;
2452 2453
	int index;
	uint8_t found = 0;
2454
	struct req_que *req = qpair->req;
2455 2456

	h = req->current_outstanding_cmd;
2457

2458 2459 2460 2461 2462 2463 2464 2465 2466 2467
	for (index = 1; index < req->num_outstanding_cmds; index++) {
		h++;
		if (h == req->num_outstanding_cmds)
			h = 1;

		if (h == QLA_TGT_SKIP_HANDLE)
			continue;

		if (!req->outstanding_cmds[h]) {
			found = 1;
2468 2469
			break;
		}
2470
	}
2471

2472 2473 2474
	if (found) {
		req->current_outstanding_cmd = h;
	} else {
2475 2476 2477
		ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
		    "qla_target(%d): Ran out of empty cmd slots\n",
		    qpair->vha->vp_idx);
2478 2479
		h = QLA_TGT_NULL_HANDLE;
	}
2480 2481 2482 2483 2484

	return h;
}

/* ha->hardware_lock supposed to be held on entry */
2485 2486
static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
	struct qla_tgt_prm *prm)
2487 2488 2489 2490
{
	uint32_t h;
	struct ctio7_to_24xx *pkt;
	struct atio_from_isp *atio = &prm->cmd->atio;
2491
	uint16_t temp;
2492

2493
	pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2494 2495 2496 2497 2498
	prm->pkt = pkt;
	memset(pkt, 0, sizeof(*pkt));

	pkt->entry_type = CTIO_TYPE7;
	pkt->entry_count = (uint8_t)prm->req_cnt;
2499
	pkt->vp_index = prm->cmd->vp_idx;
2500

2501
	h = qlt_make_handle(qpair);
2502 2503 2504 2505 2506 2507 2508
	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
		/*
		 * CTIO type 7 from the firmware doesn't provide a way to
		 * know the initiator's LOOP ID, hence we can't find
		 * the session and, so, the command.
		 */
		return -EAGAIN;
2509 2510
	} else
		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2511

2512 2513 2514
	pkt->handle = MAKE_HANDLE(qpair->req->id, h);
	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2515
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2516 2517 2518 2519
	pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	pkt->exchange_addr = atio->u.isp24.exchange_addr;
2520 2521
	temp = atio->u.isp24.attr << 9;
	pkt->u.status0.flags |= cpu_to_le16(temp);
2522 2523
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	pkt->u.status0.ox_id = cpu_to_le16(temp);
2524 2525 2526 2527 2528 2529 2530 2531 2532
	pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);

	return 0;
}

/*
 * ha->hardware_lock supposed to be held on entry. We have already made sure
 * that there is sufficient amount of request entries to not drop it.
 */
2533
static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2534 2535 2536 2537 2538 2539 2540
{
	int cnt;
	uint32_t *dword_ptr;

	/* Build continuation packets */
	while (prm->seg_cnt > 0) {
		cont_a64_entry_t *cont_pkt64 =
2541 2542
			(cont_a64_entry_t *)qlt_get_req_pkt(
			   prm->cmd->qpair->req);
2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555

		/*
		 * Make sure that from cont_pkt64 none of
		 * 64-bit specific fields used for 32-bit
		 * addressing. Cast to (cont_entry_t *) for
		 * that.
		 */

		memset(cont_pkt64, 0, sizeof(*cont_pkt64));

		cont_pkt64->entry_count = 1;
		cont_pkt64->sys_define = 0;

2556 2557
		cont_pkt64->entry_type = CONTINUE_A64_TYPE;
		dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2558 2559 2560

		/* Load continuation entry data segments */
		for (cnt = 0;
2561
		    cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2562 2563 2564 2565
		    cnt++, prm->seg_cnt--) {
			*dword_ptr++ =
			    cpu_to_le32(pci_dma_lo32
				(sg_dma_address(prm->sg)));
2566 2567
			*dword_ptr++ = cpu_to_le32(pci_dma_hi32
			    (sg_dma_address(prm->sg)));
2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578
			*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));

			prm->sg = sg_next(prm->sg);
		}
	}
}

/*
 * ha->hardware_lock supposed to be held on entry. We have already made sure
 * that there is sufficient amount of request entries to not drop it.
 */
2579
static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604
{
	int cnt;
	uint32_t *dword_ptr;
	struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;

	pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);

	/* Setup packet address segment pointer */
	dword_ptr = pkt24->u.status0.dseg_0_address;

	/* Set total data segment count */
	if (prm->seg_cnt)
		pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);

	if (prm->seg_cnt == 0) {
		/* No data transfer */
		*dword_ptr++ = 0;
		*dword_ptr = 0;
		return;
	}

	/* If scatter gather */

	/* Load command entry data segments */
	for (cnt = 0;
2605
	    (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2606 2607 2608
	    cnt++, prm->seg_cnt--) {
		*dword_ptr++ =
		    cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2609 2610 2611 2612

		*dword_ptr++ = cpu_to_le32(pci_dma_hi32(
			sg_dma_address(prm->sg)));

2613 2614 2615 2616 2617
		*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));

		prm->sg = sg_next(prm->sg);
	}

2618
	qlt_load_cont_data_segments(prm);
2619 2620 2621 2622 2623 2624 2625
}

static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
{
	return cmd->bufflen > 0;
}

2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637
static void qlt_print_dif_err(struct qla_tgt_prm *prm)
{
	struct qla_tgt_cmd *cmd;
	struct scsi_qla_host *vha;

	/* asc 0x10=dif error */
	if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
		cmd = prm->cmd;
		vha = cmd->vha;
		/* ASCQ */
		switch (prm->sense_buffer[13]) {
		case 1:
2638
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2639 2640 2641 2642 2643 2644
			    "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		case 2:
2645
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2646 2647 2648 2649 2650 2651
			    "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		case 3:
2652
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2653 2654 2655 2656 2657 2658
			    "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		default:
2659
			ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2660 2661 2662 2663 2664 2665
			    "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
			    "se_cmd=%p tag[%x]",
			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
			    cmd->atio.u.isp24.exchange_addr);
			break;
		}
2666
		ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2667 2668 2669
	}
}

2670 2671 2672 2673 2674 2675 2676 2677
/*
 * Called without ha->hardware_lock held
 */
static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
	struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
	uint32_t *full_req_cnt)
{
	struct se_cmd *se_cmd = &cmd->se_cmd;
2678
	struct qla_qpair *qpair = cmd->qpair;
2679 2680

	prm->cmd = cmd;
2681 2682
	prm->tgt = cmd->tgt;
	prm->pkt = NULL;
2683 2684 2685 2686 2687 2688
	prm->rq_result = scsi_status;
	prm->sense_buffer = &cmd->sense_buffer[0];
	prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
	prm->sg = NULL;
	prm->seg_cnt = -1;
	prm->req_cnt = 1;
2689
	prm->residual = 0;
2690
	prm->add_status_pkt = 0;
2691 2692 2693
	prm->prot_sg = NULL;
	prm->prot_seg_cnt = 0;
	prm->tot_dsds = 0;
2694 2695 2696 2697 2698 2699 2700 2701 2702 2703

	if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
		if  (qlt_pci_map_calc_cnt(prm) != 0)
			return -EAGAIN;
	}

	*full_req_cnt = prm->req_cnt;

	if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
		prm->residual = se_cmd->residual_count;
2704
		ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2705 2706 2707 2708
		    "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
		       prm->residual, se_cmd->tag,
		       se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
		       cmd->bufflen, prm->rq_result);
2709 2710 2711
		prm->rq_result |= SS_RESIDUAL_UNDER;
	} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
		prm->residual = se_cmd->residual_count;
2712
		ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2713 2714 2715
		    "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
		       prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
		       se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2716 2717 2718 2719 2720 2721 2722 2723 2724 2725
		prm->rq_result |= SS_RESIDUAL_OVER;
	}

	if (xmit_type & QLA_TGT_XMIT_STATUS) {
		/*
		 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
		 * ignored in *xmit_response() below
		 */
		if (qlt_has_data(cmd)) {
			if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2726
			    (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2727 2728 2729 2730 2731 2732 2733 2734 2735 2736
			    (prm->rq_result != 0))) {
				prm->add_status_pkt = 1;
				(*full_req_cnt)++;
			}
		}
	}

	return 0;
}

2737 2738
static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
    int sending_sense)
2739
{
2740
	if (cmd->qpair->enable_class_2)
2741 2742 2743 2744 2745
		return 0;

	if (sending_sense)
		return cmd->conf_compl_supported;
	else
2746 2747
		return cmd->qpair->enable_explicit_conf &&
                    cmd->conf_compl_supported;
2748 2749 2750 2751 2752 2753 2754
}

static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
	struct qla_tgt_prm *prm)
{
	prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
	    (uint32_t)sizeof(ctio->u.status1.sense_data));
2755
	ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2756
	if (qlt_need_explicit_conf(prm->cmd, 0)) {
2757
		ctio->u.status0.flags |= cpu_to_le16(
2758 2759 2760 2761 2762 2763 2764 2765
		    CTIO7_FLAGS_EXPLICIT_CONFORM |
		    CTIO7_FLAGS_CONFORM_REQ);
	}
	ctio->u.status0.residual = cpu_to_le32(prm->residual);
	ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
	if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
		int i;

2766
		if (qlt_need_explicit_conf(prm->cmd, 1)) {
2767
			if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2768
				ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2769 2770 2771 2772 2773
				    "Skipping EXPLICIT_CONFORM and "
				    "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
				    "non GOOD status\n");
				goto skip_explict_conf;
			}
2774
			ctio->u.status1.flags |= cpu_to_le16(
2775 2776 2777 2778 2779
			    CTIO7_FLAGS_EXPLICIT_CONFORM |
			    CTIO7_FLAGS_CONFORM_REQ);
		}
skip_explict_conf:
		ctio->u.status1.flags &=
2780
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2781
		ctio->u.status1.flags |=
2782
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2783
		ctio->u.status1.scsi_status |=
2784
		    cpu_to_le16(SS_SENSE_LEN_VALID);
2785 2786 2787 2788 2789
		ctio->u.status1.sense_length =
		    cpu_to_le16(prm->sense_buffer_len);
		for (i = 0; i < prm->sense_buffer_len/4; i++)
			((uint32_t *)ctio->u.status1.sense_data)[i] =
				cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2790 2791 2792

		qlt_print_dif_err(prm);

2793 2794
	} else {
		ctio->u.status1.flags &=
2795
		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2796
		ctio->u.status1.flags |=
2797
		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2798 2799 2800 2801 2802 2803 2804 2805
		ctio->u.status1.sense_length = 0;
		memset(ctio->u.status1.sense_data, 0,
		    sizeof(ctio->u.status1.sense_data));
	}

	/* Sense with len > 24, is it possible ??? */
}

2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828
static inline int
qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
{
	switch (se_cmd->prot_op) {
	case TARGET_PROT_DOUT_INSERT:
	case TARGET_PROT_DIN_STRIP:
		if (ql2xenablehba_err_chk >= 1)
			return 1;
		break;
	case TARGET_PROT_DOUT_PASS:
	case TARGET_PROT_DIN_PASS:
		if (ql2xenablehba_err_chk >= 2)
			return 1;
		break;
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_STRIP:
		return 1;
	default:
		break;
	}
	return 0;
}

2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845
static inline int
qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
{
	switch (se_cmd->prot_op) {
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_INSERT:
	case TARGET_PROT_DIN_STRIP:
	case TARGET_PROT_DOUT_STRIP:
	case TARGET_PROT_DIN_PASS:
	case TARGET_PROT_DOUT_PASS:
	    return 1;
	default:
	    return 0;
	}
	return 0;
}

2846
/*
2847
 * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2848
 */
2849 2850 2851
static void
qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
    uint16_t *pfw_prot_opts)
2852
{
2853
	struct se_cmd *se_cmd = &cmd->se_cmd;
2854
	uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2855 2856 2857
	scsi_qla_host_t *vha = cmd->tgt->vha;
	struct qla_hw_data *ha = vha->hw;
	uint32_t t32 = 0;
2858

2859 2860
	/*
	 * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2861 2862 2863
	 * have been immplemented by TCM, before AppTag is avail.
	 * Look for modesense_handlers[]
	 */
2864
	ctx->app_tag = 0;
2865 2866 2867
	ctx->app_tag_mask[0] = 0x0;
	ctx->app_tag_mask[1] = 0x0;

2868 2869 2870 2871 2872 2873 2874 2875 2876 2877
	if (IS_PI_UNINIT_CAPABLE(ha)) {
		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
			*pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
			*pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
	}

	t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);

2878 2879 2880
	switch (se_cmd->prot_type) {
	case TARGET_DIF_TYPE0_PROT:
		/*
2881 2882 2883
		 * No check for ql2xenablehba_err_chk, as it
		 * would be an I/O error if hba tag generation
		 * is not done.
2884 2885 2886 2887 2888 2889 2890 2891 2892
		 */
		ctx->ref_tag = cpu_to_le32(lba);
		/* enable ALL bytes of the ref tag */
		ctx->ref_tag_mask[0] = 0xff;
		ctx->ref_tag_mask[1] = 0xff;
		ctx->ref_tag_mask[2] = 0xff;
		ctx->ref_tag_mask[3] = 0xff;
		break;
	case TARGET_DIF_TYPE1_PROT:
2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908
	    /*
	     * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
	     * REF tag, and 16 bit app tag.
	     */
	    ctx->ref_tag = cpu_to_le32(lba);
	    if (!qla_tgt_ref_mask_check(se_cmd) ||
		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
		    break;
	    }
	    /* enable ALL bytes of the ref tag */
	    ctx->ref_tag_mask[0] = 0xff;
	    ctx->ref_tag_mask[1] = 0xff;
	    ctx->ref_tag_mask[2] = 0xff;
	    ctx->ref_tag_mask[3] = 0xff;
	    break;
2909
	case TARGET_DIF_TYPE2_PROT:
2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925
	    /*
	     * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
	     * tag has to match LBA in CDB + N
	     */
	    ctx->ref_tag = cpu_to_le32(lba);
	    if (!qla_tgt_ref_mask_check(se_cmd) ||
		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
		    break;
	    }
	    /* enable ALL bytes of the ref tag */
	    ctx->ref_tag_mask[0] = 0xff;
	    ctx->ref_tag_mask[1] = 0xff;
	    ctx->ref_tag_mask[2] = 0xff;
	    ctx->ref_tag_mask[3] = 0xff;
	    break;
2926
	case TARGET_DIF_TYPE3_PROT:
2927 2928 2929 2930 2931
	    /* For TYPE 3 protection: 16 bit GUARD only */
	    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
	    ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
		ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
	    break;
2932 2933 2934 2935
	}
}

static inline int
2936
qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951
{
	uint32_t		*cur_dsd;
	uint32_t		transfer_length = 0;
	uint32_t		data_bytes;
	uint32_t		dif_bytes;
	uint8_t			bundling = 1;
	struct crc_context	*crc_ctx_pkt = NULL;
	struct qla_hw_data	*ha;
	struct ctio_crc2_to_fw	*pkt;
	dma_addr_t		crc_ctx_dma;
	uint16_t		fw_prot_opts = 0;
	struct qla_tgt_cmd	*cmd = prm->cmd;
	struct se_cmd		*se_cmd = &cmd->se_cmd;
	uint32_t h;
	struct atio_from_isp *atio = &prm->cmd->atio;
2952
	struct qla_tc_param	tc;
2953
	uint16_t t16;
2954
	scsi_qla_host_t *vha = cmd->vha;
2955 2956 2957

	ha = vha->hw;

2958
	pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2959 2960 2961
	prm->pkt = pkt;
	memset(pkt, 0, sizeof(*pkt));

2962
	ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2963
		"qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2964
		cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978
		prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);

	if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
	    (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
		bundling = 0;

	/* Compute dif len and adjust data len to incude protection */
	data_bytes = cmd->bufflen;
	dif_bytes  = (data_bytes / cmd->blk_sz) * 8;

	switch (se_cmd->prot_op) {
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_STRIP:
		transfer_length = data_bytes;
2979 2980
		if (cmd->prot_sg_cnt)
			data_bytes += dif_bytes;
2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026
		break;
	case TARGET_PROT_DIN_STRIP:
	case TARGET_PROT_DOUT_INSERT:
	case TARGET_PROT_DIN_PASS:
	case TARGET_PROT_DOUT_PASS:
		transfer_length = data_bytes + dif_bytes;
		break;
	default:
		BUG();
		break;
	}

	if (!qlt_hba_err_chk_enabled(se_cmd))
		fw_prot_opts |= 0x10; /* Disable Guard tag checking */
	/* HBA error checking enabled */
	else if (IS_PI_UNINIT_CAPABLE(ha)) {
		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
			fw_prot_opts |= PO_DIS_VALD_APP_ESC;
		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
			fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
	}

	switch (se_cmd->prot_op) {
	case TARGET_PROT_DIN_INSERT:
	case TARGET_PROT_DOUT_INSERT:
		fw_prot_opts |= PO_MODE_DIF_INSERT;
		break;
	case TARGET_PROT_DIN_STRIP:
	case TARGET_PROT_DOUT_STRIP:
		fw_prot_opts |= PO_MODE_DIF_REMOVE;
		break;
	case TARGET_PROT_DIN_PASS:
	case TARGET_PROT_DOUT_PASS:
		fw_prot_opts |= PO_MODE_DIF_PASS;
		/* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
		break;
	default:/* Normal Request */
		fw_prot_opts |= PO_MODE_DIF_PASS;
		break;
	}

	/* ---- PKT ---- */
	/* Update entry type to indicate Command Type CRC_2 IOCB */
	pkt->entry_type  = CTIO_CRC2;
	pkt->entry_count = 1;
3027
	pkt->vp_index = cmd->vp_idx;
3028

3029
	h = qlt_make_handle(qpair);
3030 3031 3032 3033 3034 3035 3036 3037
	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
		/*
		 * CTIO type 7 from the firmware doesn't provide a way to
		 * know the initiator's LOOP ID, hence we can't find
		 * the session and, so, the command.
		 */
		return -EAGAIN;
	} else
3038
		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3039

3040 3041
	pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3042
	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3043
	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3044 3045 3046 3047
	pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3048 3049 3050 3051 3052 3053 3054

	/* silence compile warning */
	t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	pkt->ox_id  = cpu_to_le16(t16);

	t16 = (atio->u.isp24.attr << 9);
	pkt->flags |= cpu_to_le16(t16);
3055 3056 3057 3058
	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);

	/* Set transfer direction */
	if (cmd->dma_data_direction == DMA_TO_DEVICE)
3059
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3060
	else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3061
		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3062 3063 3064 3065 3066 3067 3068 3069 3070

	pkt->dseg_count = prm->tot_dsds;
	/* Fibre channel byte count */
	pkt->transfer_length = cpu_to_le32(transfer_length);

	/* ----- CRC context -------- */

	/* Allocate CRC context from global pool */
	crc_ctx_pkt = cmd->ctx =
3071
	    dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3072 3073 3074 3075 3076 3077 3078 3079 3080 3081

	if (!crc_ctx_pkt)
		goto crc_queuing_error;

	crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
	INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);

	/* Set handle */
	crc_ctx_pkt->handle = pkt->handle;

3082
	qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105

	pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
	pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
	pkt->crc_context_len = CRC_CONTEXT_LEN_FW;

	if (!bundling) {
		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
	} else {
		/*
		 * Configure Bundling if we need to fetch interlaving
		 * protection PCI accesses
		 */
		fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
		crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
		crc_ctx_pkt->u.bundling.dseg_count =
			cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
	}

	/* Finish the common fields of CRC pkt */
	crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
	crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
	crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3106
	crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3107

3108 3109 3110 3111 3112 3113 3114 3115
	memset((uint8_t *)&tc, 0 , sizeof(tc));
	tc.vha = vha;
	tc.blk_sz = cmd->blk_sz;
	tc.bufflen = cmd->bufflen;
	tc.sg = cmd->sg;
	tc.prot_sg = cmd->prot_sg;
	tc.ctx = crc_ctx_pkt;
	tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3116 3117

	/* Walks data segments */
3118
	pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3119 3120 3121

	if (!bundling && prm->prot_seg_cnt) {
		if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3122
			prm->tot_dsds, &tc))
3123 3124
			goto crc_queuing_error;
	} else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3125
		(prm->tot_dsds - prm->prot_seg_cnt), &tc))
3126 3127 3128 3129
		goto crc_queuing_error;

	if (bundling && prm->prot_seg_cnt) {
		/* Walks dif segments */
3130
		pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3131 3132 3133

		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
		if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3134
			prm->prot_seg_cnt, &tc))
3135 3136 3137 3138 3139 3140
			goto crc_queuing_error;
	}
	return QLA_SUCCESS;

crc_queuing_error:
	/* Cleanup will be performed by the caller */
3141
	qpair->req->outstanding_cmds[h] = NULL;
3142 3143 3144 3145

	return QLA_FUNCTION_FAILED;
}

3146 3147 3148 3149 3150 3151 3152 3153
/*
 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
 */
int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
	uint8_t scsi_status)
{
	struct scsi_qla_host *vha = cmd->vha;
3154
	struct qla_qpair *qpair = cmd->qpair;
3155 3156 3157 3158 3159 3160
	struct ctio7_to_24xx *pkt;
	struct qla_tgt_prm prm;
	uint32_t full_req_cnt = 0;
	unsigned long flags = 0;
	int res;

3161
	if (cmd->sess && cmd->sess->deleted) {
3162 3163 3164 3165 3166
		cmd->state = QLA_TGT_STATE_PROCESSED;
		if (cmd->sess->logout_completed)
			/* no need to terminate. FW already freed exchange. */
			qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
		else
3167
			qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3168 3169 3170
		return 0;
	}

3171
	ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3172
	    "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3173 3174
	    (xmit_type & QLA_TGT_XMIT_STATUS) ?
	    1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3175
	    &cmd->se_cmd, qpair->id);
3176 3177 3178 3179 3180 3181 3182

	res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
	    &full_req_cnt);
	if (unlikely(res != 0)) {
		return res;
	}

3183
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3184

3185
	if (xmit_type == QLA_TGT_XMIT_STATUS)
3186
		qpair->tgt_counters.core_qla_snd_status++;
3187
	else
3188
		qpair->tgt_counters.core_qla_que_buf++;
3189

3190
	if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3191
		/*
3192
		 * Either the port is not online or this request was from
3193 3194 3195 3196
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_PROCESSED;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3197
		ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3198 3199
			"RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
3200
			cmd->reset_count, qpair->chip_reset);
3201
		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3202 3203 3204
		return 0;
	}

3205
	/* Does F/W have an IOCBs for this request */
3206
	res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3207 3208 3209
	if (unlikely(res))
		goto out_unmap_unlock;

3210
	if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3211
		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3212
	else
3213
		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3214
	if (unlikely(res != 0)) {
3215
		qpair->req->cnt += full_req_cnt;
3216
		goto out_unmap_unlock;
3217
	}
3218 3219 3220 3221 3222

	pkt = (struct ctio7_to_24xx *)prm.pkt;

	if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
		pkt->u.status0.flags |=
3223
		    cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3224 3225
			CTIO7_FLAGS_STATUS_MODE_0);

3226
		if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3227
			qlt_load_data_segments(&prm);
3228 3229 3230 3231 3232 3233 3234

		if (prm.add_status_pkt == 0) {
			if (xmit_type & QLA_TGT_XMIT_STATUS) {
				pkt->u.status0.scsi_status =
				    cpu_to_le16(prm.rq_result);
				pkt->u.status0.residual =
				    cpu_to_le32(prm.residual);
3235
				pkt->u.status0.flags |= cpu_to_le16(
3236
				    CTIO7_FLAGS_SEND_STATUS);
3237
				if (qlt_need_explicit_conf(cmd, 0)) {
3238
					pkt->u.status0.flags |=
3239
					    cpu_to_le16(
3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251
						CTIO7_FLAGS_EXPLICIT_CONFORM |
						CTIO7_FLAGS_CONFORM_REQ);
				}
			}

		} else {
			/*
			 * We have already made sure that there is sufficient
			 * amount of request entries to not drop HW lock in
			 * req_pkt().
			 */
			struct ctio7_to_24xx *ctio =
3252 3253
				(struct ctio7_to_24xx *)qlt_get_req_pkt(
				    qpair->req);
3254

3255
			ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3256 3257
			    "Building additional status packet 0x%p.\n",
			    ctio);
3258

3259 3260 3261 3262
			/*
			 * T10Dif: ctio_crc2_to_fw overlay ontop of
			 * ctio7_to_24xx
			 */
3263
			memcpy(ctio, pkt, sizeof(*ctio));
3264
			/* reset back to CTIO7 */
3265
			ctio->entry_count = 1;
3266
			ctio->entry_type = CTIO_TYPE7;
3267
			ctio->dseg_count = 0;
3268
			ctio->u.status1.flags &= ~cpu_to_le16(
3269 3270 3271 3272
			    CTIO7_FLAGS_DATA_IN);

			/* Real finish is ctio_m1's finish */
			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3273
			pkt->u.status0.flags |= cpu_to_le16(
3274
			    CTIO7_FLAGS_DONT_RET_CTIO);
3275 3276 3277 3278 3279

			/* qlt_24xx_init_ctio_to_isp will correct
			 * all neccessary fields that's part of CTIO7.
			 * There should be no residual of CTIO-CRC2 data.
			 */
3280 3281 3282 3283 3284 3285 3286 3287
			qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
			    &prm);
		}
	} else
		qlt_24xx_init_ctio_to_isp(pkt, &prm);


	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3288
	cmd->cmd_sent_to_fw = 1;
3289

3290 3291
	/* Memory Barrier */
	wmb();
3292 3293 3294 3295
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
3296
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3297 3298 3299 3300

	return 0;

out_unmap_unlock:
J
Joern Engel 已提交
3301
	qlt_unmap_sg(vha, cmd);
3302
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313

	return res;
}
EXPORT_SYMBOL(qlt_xmit_response);

int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
{
	struct ctio7_to_24xx *pkt;
	struct scsi_qla_host *vha = cmd->vha;
	struct qla_tgt *tgt = cmd->tgt;
	struct qla_tgt_prm prm;
3314
	unsigned long flags = 0;
3315
	int res = 0;
3316
	struct qla_qpair *qpair = cmd->qpair;
3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327

	memset(&prm, 0, sizeof(prm));
	prm.cmd = cmd;
	prm.tgt = tgt;
	prm.sg = NULL;
	prm.req_cnt = 1;

	/* Calculate number of entries and segments required */
	if (qlt_pci_map_calc_cnt(&prm) != 0)
		return -EAGAIN;

3328
	if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3329
	    (cmd->sess && cmd->sess->deleted)) {
3330
		/*
3331
		 * Either the port is not online or this request was from
3332 3333 3334 3335
		 * previous life, just abort the processing.
		 */
		cmd->state = QLA_TGT_STATE_NEED_DATA;
		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3336
		ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3337 3338
			"RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
			vha->flags.online, qla2x00_reset_active(vha),
3339
			cmd->reset_count, qpair->chip_reset);
3340 3341 3342
		return 0;
	}

3343
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3344
	/* Does F/W have an IOCBs for this request */
3345
	res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3346 3347
	if (res != 0)
		goto out_unlock_free_unmap;
3348
	if (cmd->se_cmd.prot_op)
3349
		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3350
	else
3351
		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3352

3353
	if (unlikely(res != 0)) {
3354
		qpair->req->cnt += prm.req_cnt;
3355
		goto out_unlock_free_unmap;
3356 3357
	}

3358
	pkt = (struct ctio7_to_24xx *)prm.pkt;
3359
	pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3360
	    CTIO7_FLAGS_STATUS_MODE_0);
3361 3362

	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3363
		qlt_load_data_segments(&prm);
3364 3365

	cmd->state = QLA_TGT_STATE_NEED_DATA;
3366
	cmd->cmd_sent_to_fw = 1;
3367

3368 3369
	/* Memory Barrier */
	wmb();
3370 3371 3372 3373
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
3374
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3375 3376 3377 3378

	return res;

out_unlock_free_unmap:
J
Joern Engel 已提交
3379
	qlt_unmap_sg(vha, cmd);
3380
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3381 3382 3383 3384 3385

	return res;
}
EXPORT_SYMBOL(qlt_rdy_to_xfer);

3386 3387

/*
3388
 * it is assumed either hardware_lock or qpair lock is held.
3389
 */
3390
static void
3391
qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3392
	struct ctio_crc_from_fw *sts)
3393 3394 3395 3396
{
	uint8_t		*ap = &sts->actual_dif[0];
	uint8_t		*ep = &sts->expected_dif[0];
	uint64_t	lba = cmd->se_cmd.t_task_lba;
3397 3398
	uint8_t scsi_status, sense_key, asc, ascq;
	unsigned long flags;
3399
	struct scsi_qla_host *vha = cmd->vha;
3400

3401
	cmd->trc_flags |= TRC_DIF_ERR;
3402

3403 3404 3405
	cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
	cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
	cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3406

3407 3408 3409
	cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
	cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
	cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3410

3411 3412
	ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
	    "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3413

3414
	scsi_status = sense_key = asc = ascq = 0;
3415

3416 3417
	/* check appl tag */
	if (cmd->e_app_tag != cmd->a_app_tag) {
3418 3419 3420 3421 3422 3423
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
		    "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3424 3425 3426 3427 3428 3429

		cmd->dif_err_code = DIF_ERR_APP;
		scsi_status = SAM_STAT_CHECK_CONDITION;
		sense_key = ABORTED_COMMAND;
		asc = 0x10;
		ascq = 0x2;
3430 3431 3432
	}

	/* check ref tag */
3433
	if (cmd->e_ref_tag != cmd->a_ref_tag) {
3434 3435 3436 3437 3438 3439
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
		    "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3440 3441 3442 3443 3444 3445

		cmd->dif_err_code = DIF_ERR_REF;
		scsi_status = SAM_STAT_CHECK_CONDITION;
		sense_key = ABORTED_COMMAND;
		asc = 0x10;
		ascq = 0x3;
3446 3447 3448
		goto out;
	}

3449 3450
	/* check guard */
	if (cmd->e_guard != cmd->a_guard) {
3451 3452 3453 3454 3455 3456 3457
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
		    "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
		    cmd->atio.u.isp24.fcp_hdr.ox_id);

3458 3459 3460 3461 3462
		cmd->dif_err_code = DIF_ERR_GRD;
		scsi_status = SAM_STAT_CHECK_CONDITION;
		sense_key = ABORTED_COMMAND;
		asc = 0x10;
		ascq = 0x1;
3463 3464
	}
out:
3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478
	switch (cmd->state) {
	case QLA_TGT_STATE_NEED_DATA:
		/* handle_data will load DIF error code  */
		cmd->state = QLA_TGT_STATE_DATA_IN;
		vha->hw->tgt.tgt_ops->handle_data(cmd);
		break;
	default:
		spin_lock_irqsave(&cmd->cmd_lock, flags);
		if (cmd->aborted) {
			spin_unlock_irqrestore(&cmd->cmd_lock, flags);
			vha->hw->tgt.tgt_ops->free_cmd(cmd);
			break;
		}
		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3479

3480 3481
		qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
		    ascq);
3482 3483 3484 3485 3486 3487 3488
		/* assume scsi status gets out on the wire.
		 * Will not wait for completion.
		 */
		vha->hw->tgt.tgt_ops->free_cmd(cmd);
		break;
	}
}
3489

3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502
/* If hardware_lock held on entry, might drop it, then reaquire */
/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *ntfy)
{
	struct nack_to_isp *nack;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	int ret = 0;

	ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
	    "Sending TERM ELS CTIO (ha=%p)\n", ha);

3503
	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3504 3505 3506 3507 3508 3509 3510 3511 3512
	if (pkt == NULL) {
		ql_dbg(ql_dbg_tgt, vha, 0xe080,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", vha->vp_idx, __func__);
		return -ENOMEM;
	}

	pkt->entry_type = NOTIFY_ACK_TYPE;
	pkt->entry_count = 1;
3513
	pkt->handle = QLA_TGT_SKIP_HANDLE;
3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552

	nack = (struct nack_to_isp *)pkt;
	nack->ox_id = ntfy->ox_id;

	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
		nack->u.isp24.flags = ntfy->u.isp24.flags &
			__constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
	}

	/* terminate */
	nack->u.isp24.flags |=
		__constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);

	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
	nack->u.isp24.status = ntfy->u.isp24.status;
	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;

	qla2x00_start_iocbs(vha, vha->req);
	return ret;
}

static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *imm, int ha_locked)
{
	unsigned long flags = 0;
	int rc;

	if (ha_locked) {
		rc = __qlt_send_term_imm_notif(vha, imm);

#if 0	/* Todo  */
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3553 3554 3555
#else
		if (rc) {
		}
3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572
#endif
		goto done;
	}

	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
	rc = __qlt_send_term_imm_notif(vha, imm);

#if 0	/* Todo */
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, imm, 0, 0);
#endif

done:
	if (!ha_locked)
		spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
}

3573 3574 3575 3576
/*
 * If hardware_lock held on entry, might drop it, then reaquire
 * This function sends the appropriate CTIO to ISP 2xxx or 24xx
 */
3577
static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3578 3579 3580
	struct qla_tgt_cmd *cmd,
	struct atio_from_isp *atio)
{
3581
	struct scsi_qla_host *vha = qpair->vha;
3582 3583 3584 3585
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
	int ret = 0;
3586
	uint16_t temp;
3587

3588
	ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3589

3590 3591 3592
	if (cmd)
		vha = cmd->vha;

3593
	pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610
	if (pkt == NULL) {
		ql_dbg(ql_dbg_tgt, vha, 0xe050,
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet\n", vha->vp_idx, __func__);
		return -ENOMEM;
	}

	if (cmd != NULL) {
		if (cmd->state < QLA_TGT_STATE_PROCESSED) {
			ql_dbg(ql_dbg_tgt, vha, 0xe051,
			    "qla_target(%d): Terminating cmd %p with "
			    "incorrect state %d\n", vha->vp_idx, cmd,
			    cmd->state);
		} else
			ret = 1;
	}

3611
	qpair->tgt_counters.num_term_xchg_sent++;
3612 3613 3614 3615 3616
	pkt->entry_count = 1;
	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;

	ctio24 = (struct ctio7_to_24xx *)pkt;
	ctio24->entry_type = CTIO_TYPE7;
3617
	ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3618
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3619 3620 3621 3622 3623
	ctio24->vp_index = vha->vp_idx;
	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3624 3625 3626
	temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
		CTIO7_FLAGS_TERMINATE;
	ctio24->u.status1.flags = cpu_to_le16(temp);
3627 3628
	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.ox_id = cpu_to_le16(temp);
3629

3630 3631
	/* Memory Barrier */
	wmb();
3632 3633 3634 3635
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
3636 3637 3638
	return ret;
}

3639
static void qlt_send_term_exchange(struct qla_qpair *qpair,
3640 3641
	struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
	int ul_abort)
3642
{
3643
	struct scsi_qla_host *vha;
3644
	unsigned long flags = 0;
3645 3646
	int rc;

3647 3648 3649 3650 3651
	/* why use different vha? NPIV */
	if (cmd)
		vha = cmd->vha;
	else
		vha = qpair->vha;
3652 3653

	if (ha_locked) {
3654
		rc = __qlt_send_term_exchange(qpair, cmd, atio);
3655 3656
		if (rc == -ENOMEM)
			qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3657 3658
		goto done;
	}
3659 3660
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
	rc = __qlt_send_term_exchange(qpair, cmd, atio);
3661 3662
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3663

3664
done:
3665
	if (cmd && !ul_abort && !cmd->aborted) {
3666 3667
		if (cmd->sg_mapped)
			qlt_unmap_sg(vha, cmd);
3668 3669
		vha->hw->tgt.tgt_ops->free_cmd(cmd);
	}
3670 3671

	if (!ha_locked)
3672
		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3673

3674
	return;
3675 3676
}

3677 3678 3679 3680 3681 3682
static void qlt_init_term_exchange(struct scsi_qla_host *vha)
{
	struct list_head free_list;
	struct qla_tgt_cmd *cmd, *tcmd;

	vha->hw->tgt.leak_exchg_thresh_hold =
3683
	    (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712

	cmd = tcmd = NULL;
	if (!list_empty(&vha->hw->tgt.q_full_list)) {
		INIT_LIST_HEAD(&free_list);
		list_splice_init(&vha->hw->tgt.q_full_list, &free_list);

		list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
			list_del(&cmd->cmd_list);
			/* This cmd was never sent to TCM.  There is no need
			 * to schedule free or call free_cmd
			 */
			qlt_free_cmd(cmd);
			vha->hw->tgt.num_qfull_cmds_alloc--;
		}
	}
	vha->hw->tgt.num_qfull_cmds_dropped = 0;
}

static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
{
	uint32_t total_leaked;

	total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;

	if (vha->hw->tgt.leak_exchg_thresh_hold &&
	    (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {

		ql_dbg(ql_dbg_tgt, vha, 0xe079,
		    "Chip reset due to exchange starvation: %d/%d.\n",
3713
		    total_leaked, vha->hw->cur_fw_xcb_count);
3714 3715 3716 3717 3718 3719 3720 3721 3722 3723

		if (IS_P3P_TYPE(vha->hw))
			set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
		else
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		qla2xxx_wake_dpc(vha);
	}

}

3724
int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3725 3726 3727 3728
{
	struct qla_tgt *tgt = cmd->tgt;
	struct scsi_qla_host *vha = tgt->vha;
	struct se_cmd *se_cmd = &cmd->se_cmd;
3729
	unsigned long flags;
3730 3731 3732 3733 3734 3735

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
	    "qla_target(%d): terminating exchange for aborted cmd=%p "
	    "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
	    se_cmd->tag);

3736 3737 3738 3739 3740 3741 3742 3743
	spin_lock_irqsave(&cmd->cmd_lock, flags);
	if (cmd->aborted) {
		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
		/*
		 * It's normal to see 2 calls in this path:
		 *  1) XFER Rdy completion + CMD_T_ABORT
		 *  2) TCM TMR - drain_state_list
		 */
3744 3745 3746 3747
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
		    "multiple abort. %p transport_state %x, t_state %x, "
		    "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
		    cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3748 3749
		return EIO;
	}
3750
	cmd->aborted = 1;
3751
	cmd->trc_flags |= TRC_ABORT;
3752
	spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3753

3754
	qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3755
	return 0;
3756 3757 3758
}
EXPORT_SYMBOL(qlt_abort_cmd);

3759 3760
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
3761
	struct fc_port *sess = cmd->sess;
3762

3763 3764 3765 3766
	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
	    "%s: se_cmd[%p] ox_id %04x\n",
	    __func__, &cmd->se_cmd,
	    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3767

3768 3769
	BUG_ON(cmd->cmd_in_wq);

3770 3771 3772
	if (cmd->sg_mapped)
		qlt_unmap_sg(cmd->vha, cmd);

3773 3774 3775
	if (!cmd->q_full)
		qlt_decr_num_pend_cmds(cmd->vha);

3776
	BUG_ON(cmd->sg_mapped);
3777
	cmd->jiffies_at_free = get_jiffies_64();
3778 3779
	if (unlikely(cmd->free_sg))
		kfree(cmd->sg);
3780 3781 3782 3783 3784

	if (!sess || !sess->se_sess) {
		WARN_ON(1);
		return;
	}
3785
	cmd->jiffies_at_free = get_jiffies_64();
3786
	target_free_tag(sess->se_sess, &cmd->se_cmd);
3787 3788 3789 3790 3791 3792
}
EXPORT_SYMBOL(qlt_free_cmd);

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
3793
static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3794 3795 3796
	struct qla_tgt_cmd *cmd, uint32_t status)
{
	int term = 0;
3797
	struct scsi_qla_host *vha = qpair->vha;
3798

3799
	if (cmd->se_cmd.prot_op)
3800
		ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3801 3802 3803 3804 3805 3806 3807 3808
		    "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
		    "se_cmd=%p tag[%x] op %#x/%s",
		     cmd->lba, cmd->lba,
		     cmd->num_blks, &cmd->se_cmd,
		     cmd->atio.u.isp24.exchange_addr,
		     cmd->se_cmd.prot_op,
		     prot_op_str(cmd->se_cmd.prot_op));

3809 3810 3811
	if (ctio != NULL) {
		struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
		term = !(c->flags &
3812
		    cpu_to_le16(OF_TERM_EXCH));
3813 3814 3815 3816
	} else
		term = 1;

	if (term)
3817
		qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3818 3819 3820 3821 3822 3823 3824

	return term;
}


/* ha->hardware_lock supposed to be held on entry */
static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3825
	struct rsp_que *rsp, uint32_t handle, void *ctio)
3826 3827
{
	struct qla_tgt_cmd *cmd = NULL;
3828 3829 3830
	struct req_que *req;
	int qid = GET_QID(handle);
	uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3831

3832 3833
	if (unlikely(h == QLA_TGT_SKIP_HANDLE))
		return NULL;
3834

3835 3836 3837 3838 3839 3840 3841 3842 3843 3844
	if (qid == rsp->req->id) {
		req = rsp->req;
	} else if (vha->hw->req_q_map[qid]) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
		    "qla_target(%d): CTIO completion with different QID %d handle %x\n",
		    vha->vp_idx, rsp->id, handle);
		req = vha->hw->req_q_map[qid];
	} else {
		return NULL;
	}
3845

3846
	h &= QLA_CMD_HANDLE_MASK;
3847

3848
	if (h != QLA_TGT_NULL_HANDLE) {
3849
		if (unlikely(h >= req->num_outstanding_cmds)) {
3850 3851 3852 3853 3854
			ql_dbg(ql_dbg_tgt, vha, 0xe052,
			    "qla_target(%d): Wrong handle %x received\n",
			    vha->vp_idx, handle);
			return NULL;
		}
3855 3856 3857

		cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
		if (unlikely(cmd == NULL)) {
3858
			ql_dbg(ql_dbg_async, vha, 0xe053,
3859 3860
			    "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
				vha->vp_idx, handle, req->id, rsp->id);
3861 3862
			return NULL;
		}
3863
		req->outstanding_cmds[h] = NULL;
3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874
	} else if (ctio != NULL) {
		/* We can't get loop ID from CTIO7 */
		ql_dbg(ql_dbg_tgt, vha, 0xe054,
		    "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
		    "support NULL handles\n", vha->vp_idx);
		return NULL;
	}

	return cmd;
}

3875
/* hardware_lock should be held by caller. */
3876
void
3877 3878 3879 3880 3881 3882 3883 3884 3885 3886
qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
{
	struct qla_hw_data *ha = vha->hw;

	if (cmd->sg_mapped)
		qlt_unmap_sg(vha, cmd);

	/* TODO: fix debug message type and ids. */
	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
		ql_dbg(ql_dbg_io, vha, 0xff00,
3887
		    "HOST-ABORT: state=PROCESSED.\n");
3888 3889 3890 3891 3892
	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->write_data_transferred = 0;
		cmd->state = QLA_TGT_STATE_DATA_IN;

		ql_dbg(ql_dbg_io, vha, 0xff01,
3893
		    "HOST-ABORT: state=DATA_IN.\n");
3894 3895 3896 3897 3898

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
	} else {
		ql_dbg(ql_dbg_io, vha, 0xff03,
3899
		    "HOST-ABORT: state=BAD(%d).\n",
3900 3901 3902 3903
		    cmd->state);
		dump_stack();
	}

3904
	cmd->trc_flags |= TRC_FLUSH;
3905 3906 3907
	ha->tgt.tgt_ops->free_cmd(cmd);
}

3908 3909 3910
/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
3911 3912
static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
    struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3913 3914 3915 3916
{
	struct qla_hw_data *ha = vha->hw;
	struct se_cmd *se_cmd;
	struct qla_tgt_cmd *cmd;
3917
	struct qla_qpair *qpair = rsp->qpair;
3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928

	if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
		/* That could happen only in case of an error/reset/abort */
		if (status != CTIO_SUCCESS) {
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
			    "Intermediate CTIO received"
			    " (status %x)\n", status);
		}
		return;
	}

3929
	cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3930
	if (cmd == NULL)
3931
		return;
3932

3933
	se_cmd = &cmd->se_cmd;
3934
	cmd->cmd_sent_to_fw = 0;
3935

J
Joern Engel 已提交
3936
	qlt_unmap_sg(vha, cmd);
3937 3938 3939 3940 3941 3942

	if (unlikely(status != CTIO_SUCCESS)) {
		switch (status & 0xFFFF) {
		case CTIO_LIP_RESET:
		case CTIO_TARGET_RESET:
		case CTIO_ABORTED:
3943
			/* driver request abort via Terminate exchange */
3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956
		case CTIO_TIMEOUT:
		case CTIO_INVALID_RX_ID:
			/* They are OK */
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
			    "qla_target(%d): CTIO with "
			    "status %#x received, state %x, se_cmd %p, "
			    "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
			    "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
			    status, cmd->state, se_cmd);
			break;

		case CTIO_PORT_LOGGED_OUT:
		case CTIO_PORT_UNAVAILABLE:
3957
		{
3958 3959 3960
			int logged_out =
				(status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;

3961
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3962
			    "qla_target(%d): CTIO with %s status %x "
3963
			    "received (state %x, se_cmd %p)\n", vha->vp_idx,
3964
			    logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3965 3966
			    status, cmd->state, se_cmd);

3967 3968 3969 3970 3971 3972 3973
			if (logged_out && cmd->sess) {
				/*
				 * Session is already logged out, but we need
				 * to notify initiator, who's not aware of this
				 */
				cmd->sess->logout_on_delete = 0;
				cmd->sess->send_els_logo = 1;
3974
				ql_dbg(ql_dbg_disc, vha, 0x20f8,
3975 3976 3977
				    "%s %d %8phC post del sess\n",
				    __func__, __LINE__, cmd->sess->port_name);

3978
				qlt_schedule_sess_for_deletion(cmd->sess);
3979 3980 3981
			}
			break;
		}
3982 3983 3984 3985
		case CTIO_DIF_ERROR: {
			struct ctio_crc_from_fw *crc =
				(struct ctio_crc_from_fw *)ctio;
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3986 3987 3988
			    "qla_target(%d): CTIO with DIF_ERROR status %x "
			    "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
			    "expect_dif[0x%llx]\n",
3989 3990 3991 3992
			    vha->vp_idx, status, cmd->state, se_cmd,
			    *((u64 *)&crc->actual_dif[0]),
			    *((u64 *)&crc->expected_dif[0]));

3993
			qlt_handle_dif_error(qpair, cmd, ctio);
3994
			return;
3995
		}
3996 3997
		default:
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3998
			    "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3999 4000 4001 4002
			    vha->vp_idx, status, cmd->state, se_cmd);
			break;
		}

4003

4004
		/* "cmd->aborted" means
4005 4006 4007 4008 4009 4010
		 * cmd is already aborted/terminated, we don't
		 * need to terminate again.  The exchange is already
		 * cleaned up/freed at FW level.  Just cleanup at driver
		 * level.
		 */
		if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4011
		    (!cmd->aborted)) {
4012
			cmd->trc_flags |= TRC_CTIO_ERR;
4013
			if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4014
				return;
4015
		}
4016 4017 4018
	}

	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4019
		cmd->trc_flags |= TRC_CTIO_DONE;
4020 4021 4022
	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
		cmd->state = QLA_TGT_STATE_DATA_IN;

4023
		if (status == CTIO_SUCCESS)
4024 4025 4026 4027
			cmd->write_data_transferred = 1;

		ha->tgt.tgt_ops->handle_data(cmd);
		return;
4028
	} else if (cmd->aborted) {
4029
		cmd->trc_flags |= TRC_CTIO_ABORTED;
4030
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4031
		  "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4032
	} else {
4033
		cmd->trc_flags |= TRC_CTIO_STRANGE;
4034 4035 4036 4037 4038
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
		    "qla_target(%d): A command in state (%d) should "
		    "not return a CTIO complete\n", vha->vp_idx, cmd->state);
	}

4039
	if (unlikely(status != CTIO_SUCCESS) &&
4040
		!cmd->aborted) {
4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
		dump_stack();
	}

	ha->tgt.tgt_ops->free_cmd(cmd);
}

static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
	uint8_t task_codes)
{
	int fcp_task_attr;

	switch (task_codes) {
	case ATIO_SIMPLE_QUEUE:
C
Christoph Hellwig 已提交
4055
		fcp_task_attr = TCM_SIMPLE_TAG;
4056 4057
		break;
	case ATIO_HEAD_OF_QUEUE:
C
Christoph Hellwig 已提交
4058
		fcp_task_attr = TCM_HEAD_TAG;
4059 4060
		break;
	case ATIO_ORDERED_QUEUE:
C
Christoph Hellwig 已提交
4061
		fcp_task_attr = TCM_ORDERED_TAG;
4062 4063
		break;
	case ATIO_ACA_QUEUE:
C
Christoph Hellwig 已提交
4064
		fcp_task_attr = TCM_ACA_TAG;
4065 4066
		break;
	case ATIO_UNTAGGED:
C
Christoph Hellwig 已提交
4067
		fcp_task_attr = TCM_SIMPLE_TAG;
4068 4069 4070 4071 4072
		break;
	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
		    "qla_target: unknown task code %x, use ORDERED instead\n",
		    task_codes);
C
Christoph Hellwig 已提交
4073
		fcp_task_attr = TCM_ORDERED_TAG;
4074 4075 4076 4077 4078 4079
		break;
	}

	return fcp_task_attr;
}

4080
static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4081 4082 4083 4084
					uint8_t *);
/*
 * Process context for I/O path into tcm_qla2xxx code
 */
4085
static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4086 4087 4088
{
	scsi_qla_host_t *vha = cmd->vha;
	struct qla_hw_data *ha = vha->hw;
4089
	struct fc_port *sess = cmd->sess;
4090 4091 4092 4093 4094
	struct atio_from_isp *atio = &cmd->atio;
	unsigned char *cdb;
	unsigned long flags;
	uint32_t data_length;
	int ret, fcp_task_attr, data_dir, bidi = 0;
4095
	struct qla_qpair *qpair = cmd->qpair;
4096

4097
	cmd->cmd_in_wq = 0;
4098
	cmd->trc_flags |= TRC_DO_WORK;
4099

4100
	if (cmd->aborted) {
4101 4102 4103 4104 4105 4106
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
		    "cmd with tag %u is aborted\n",
		    cmd->atio.u.isp24.exchange_addr);
		goto out_term;
	}

4107
	spin_lock_init(&cmd->cmd_lock);
4108
	cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4109
	cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123

	if (atio->u.isp24.fcp_cmnd.rddata &&
	    atio->u.isp24.fcp_cmnd.wrdata) {
		bidi = 1;
		data_dir = DMA_TO_DEVICE;
	} else if (atio->u.isp24.fcp_cmnd.rddata)
		data_dir = DMA_FROM_DEVICE;
	else if (atio->u.isp24.fcp_cmnd.wrdata)
		data_dir = DMA_TO_DEVICE;
	else
		data_dir = DMA_NONE;

	fcp_task_attr = qlt_get_fcp_task_attr(vha,
	    atio->u.isp24.fcp_cmnd.task_attr);
4124
	data_length = get_datalen_for_atio(atio);
4125

4126 4127
	ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
				          fcp_task_attr, data_dir, bidi);
4128 4129 4130 4131 4132
	if (ret != 0)
		goto out_term;
	/*
	 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
	 */
4133
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4134
	ha->tgt.tgt_ops->put_sess(sess);
4135
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4136 4137 4138
	return;

out_term:
4139
	ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4140
	/*
4141 4142
	 * cmd has not sent to target yet, so pass NULL as the second
	 * argument to qlt_send_term_exchange() and free the memory here.
4143
	 */
4144
	cmd->trc_flags |= TRC_DO_WORK_ERR;
4145 4146
	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
	qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4147 4148

	qlt_decr_num_pend_cmds(vha);
4149
	target_free_tag(sess->se_sess, &cmd->se_cmd);
4150
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4151 4152

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4153
	ha->tgt.tgt_ops->put_sess(sess);
4154
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4155 4156 4157 4158 4159
}

static void qlt_do_work(struct work_struct *work)
{
	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4160 4161 4162 4163 4164 4165
	scsi_qla_host_t *vha = cmd->vha;
	unsigned long flags;

	spin_lock_irqsave(&vha->cmd_list_lock, flags);
	list_del(&cmd->cmd_list);
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4166 4167 4168 4169

	__qlt_do_work(cmd);
}

4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194
void qlt_clr_qp_table(struct scsi_qla_host *vha)
{
	unsigned long flags;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	void *node;
	u64 key = 0;

	ql_log(ql_log_info, vha, 0x706c,
	    "User update Number of Active Qpairs %d\n",
	    ha->tgt.num_act_qpairs);

	spin_lock_irqsave(&ha->tgt.atio_lock, flags);

	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
		btree_remove64(&tgt->lun_qpair_map, key);

	ha->base_qpair->lun_cnt = 0;
	for (key = 0; key < ha->max_qpairs; key++)
		if (ha->queue_pair_map[key])
			ha->queue_pair_map[key]->lun_cnt = 0;

	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
}

4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273
static void qlt_assign_qpair(struct scsi_qla_host *vha,
	struct qla_tgt_cmd *cmd)
{
	struct qla_qpair *qpair, *qp;
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	struct qla_qpair_hint *h;

	if (vha->flags.qpairs_available) {
		h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
		if (unlikely(!h)) {
			/* spread lun to qpair ratio evently */
			int lcnt = 0, rc;
			struct scsi_qla_host *base_vha =
				pci_get_drvdata(vha->hw->pdev);

			qpair = vha->hw->base_qpair;
			if (qpair->lun_cnt == 0) {
				qpair->lun_cnt++;
				h = qla_qpair_to_hint(tgt, qpair);
				BUG_ON(!h);
				rc = btree_insert64(&tgt->lun_qpair_map,
					cmd->unpacked_lun, h, GFP_ATOMIC);
				if (rc) {
					qpair->lun_cnt--;
					ql_log(ql_log_info, vha, 0xd037,
					    "Unable to insert lun %llx into lun_qpair_map\n",
					    cmd->unpacked_lun);
				}
				goto out;
			} else {
				lcnt = qpair->lun_cnt;
			}

			h = NULL;
			list_for_each_entry(qp, &base_vha->qp_list,
			    qp_list_elem) {
				if (qp->lun_cnt == 0) {
					qp->lun_cnt++;
					h = qla_qpair_to_hint(tgt, qp);
					BUG_ON(!h);
					rc = btree_insert64(&tgt->lun_qpair_map,
					    cmd->unpacked_lun, h, GFP_ATOMIC);
					if (rc) {
						qp->lun_cnt--;
						ql_log(ql_log_info, vha, 0xd038,
							"Unable to insert lun %llx into lun_qpair_map\n",
							cmd->unpacked_lun);
					}
					qpair = qp;
					goto out;
				} else {
					if (qp->lun_cnt < lcnt) {
						lcnt = qp->lun_cnt;
						qpair = qp;
						continue;
					}
				}
			}
			BUG_ON(!qpair);
			qpair->lun_cnt++;
			h = qla_qpair_to_hint(tgt, qpair);
			BUG_ON(!h);
			rc = btree_insert64(&tgt->lun_qpair_map,
				cmd->unpacked_lun, h, GFP_ATOMIC);
			if (rc) {
				qpair->lun_cnt--;
				ql_log(ql_log_info, vha, 0xd039,
				   "Unable to insert lun %llx into lun_qpair_map\n",
				   cmd->unpacked_lun);
			}
		}
	} else {
		h = &tgt->qphints[0];
	}
out:
	cmd->qpair = h->qpair;
	cmd->se_cmd.cpuid = h->cpuid;
}

4274
static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4275
				       struct fc_port *sess,
4276 4277 4278 4279
				       struct atio_from_isp *atio)
{
	struct se_session *se_sess = sess->se_sess;
	struct qla_tgt_cmd *cmd;
4280
	int tag, cpu;
4281

4282
	tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
4283 4284 4285 4286 4287
	if (tag < 0)
		return NULL;

	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
	memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4288
	cmd->cmd_type = TYPE_TGT_CMD;
4289 4290 4291
	memcpy(&cmd->atio, atio, sizeof(*atio));
	cmd->state = QLA_TGT_STATE_NEW;
	cmd->tgt = vha->vha_tgt.qla_tgt;
4292
	qlt_incr_num_pend_cmds(vha);
4293 4294
	cmd->vha = vha;
	cmd->se_cmd.map_tag = tag;
4295
	cmd->se_cmd.map_cpu = cpu;
4296 4297 4298 4299
	cmd->sess = sess;
	cmd->loop_id = sess->loop_id;
	cmd->conf_compl_supported = sess->conf_compl_supported;

4300
	cmd->trc_flags = 0;
4301 4302
	cmd->jiffies_at_alloc = get_jiffies_64();

4303 4304 4305
	cmd->unpacked_lun = scsilun_to_int(
	    (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
	qlt_assign_qpair(vha, cmd);
4306
	cmd->reset_count = vha->hw->base_qpair->chip_reset;
4307
	cmd->vp_idx = vha->vp_idx;
4308

4309 4310 4311
	return cmd;
}

4312 4313 4314 4315
/* ha->hardware_lock supposed to be held on entry */
static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
	struct atio_from_isp *atio)
{
4316
	struct qla_hw_data *ha = vha->hw;
4317
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4318
	struct fc_port *sess;
4319
	struct qla_tgt_cmd *cmd;
4320
	unsigned long flags;
4321
	port_id_t id;
4322 4323

	if (unlikely(tgt->tgt_stop)) {
4324
		ql_dbg(ql_dbg_io, vha, 0x3061,
4325
		    "New command while device %p is shutting down\n", tgt);
4326
		return -ENODEV;
4327 4328
	}

4329 4330 4331 4332 4333 4334
	id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
	id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
	id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
	if (IS_SW_RESV_ADDR(id))
		return -EBUSY;

4335
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4336 4337
	if (unlikely(!sess))
		return -EFAULT;
4338 4339 4340

	/* Another WWN used to have our s_id. Our PLOGI scheduled its
	 * session deletion, but it's still in sess_del_work wq */
4341
	if (sess->deleted) {
4342
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4343 4344 4345 4346 4347
		    "New command while old session %p is being deleted\n",
		    sess);
		return -EFAULT;
	}

4348 4349 4350
	/*
	 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
	 */
4351
	if (!kref_get_unless_zero(&sess->sess_kref)) {
4352
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4353 4354 4355 4356 4357
		    "%s: kref_get fail, %8phC oxid %x \n",
		    __func__, sess->port_name,
		     be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
		return -EFAULT;
	}
4358 4359

	cmd = qlt_get_tag(vha, sess, atio);
4360
	if (!cmd) {
4361
		ql_dbg(ql_dbg_io, vha, 0x3062,
4362
		    "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4363 4364 4365
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		ha->tgt.tgt_ops->put_sess(sess);
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4366
		return -EBUSY;
4367 4368
	}

4369
	cmd->cmd_in_wq = 1;
4370
	cmd->trc_flags |= TRC_NEW_CMD;
4371

4372
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4373
	list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4374
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4375

4376
	INIT_WORK(&cmd->work, qlt_do_work);
4377 4378 4379
	if (vha->flags.qpairs_available) {
		queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
	} else if (ha->msix_count) {
4380 4381 4382 4383 4384 4385 4386 4387 4388
		if (cmd->atio.u.isp24.fcp_cmnd.rddata)
			queue_work_on(smp_processor_id(), qla_tgt_wq,
			    &cmd->work);
		else
			queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
			    &cmd->work);
	} else {
		queue_work(qla_tgt_wq, &cmd->work);
	}
4389

4390
	return 0;
4391 4392 4393
}

/* ha->hardware_lock supposed to be held on entry */
4394
static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4395 4396 4397 4398 4399
	int fn, void *iocb, int flags)
{
	struct scsi_qla_host *vha = sess->vha;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
4400
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4401
	struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419

	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
	if (!mcmd) {
		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
		    "qla_target(%d): Allocation of management "
		    "command failed, some commands and their data could "
		    "leak\n", vha->vp_idx);
		return -ENOMEM;
	}
	memset(mcmd, 0, sizeof(*mcmd));
	mcmd->sess = sess;

	if (iocb) {
		memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
		    sizeof(mcmd->orig_iocb.imm_ntfy));
	}
	mcmd->tmr_func = fn;
	mcmd->flags = flags;
4420
	mcmd->reset_count = ha->base_qpair->chip_reset;
4421
	mcmd->qpair = h->qpair;
4422
	mcmd->vha = vha;
4423 4424
	mcmd->se_cmd.cpuid = h->cpuid;
	mcmd->unpacked_lun = lun;
4425 4426 4427

	switch (fn) {
	case QLA_TGT_LUN_RESET:
4428 4429 4430 4431 4432 4433 4434 4435 4436
	case QLA_TGT_CLEAR_TS:
	case QLA_TGT_ABORT_TS:
		abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
		/* drop through */
	case QLA_TGT_CLEAR_ACA:
		h = qlt_find_qphint(vha, mcmd->unpacked_lun);
		mcmd->qpair = h->qpair;
		mcmd->se_cmd.cpuid = h->cpuid;
		break;
4437

4438 4439 4440 4441 4442 4443 4444
	case QLA_TGT_TARGET_RESET:
	case QLA_TGT_NEXUS_LOSS_SESS:
	case QLA_TGT_NEXUS_LOSS:
	case QLA_TGT_ABORT_ALL:
	default:
		/* no-op */
		break;
4445 4446
	}

4447 4448 4449 4450
	INIT_WORK(&mcmd->work, qlt_do_tmr_work);
	queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
	    &mcmd->work);

4451 4452 4453 4454 4455 4456 4457 4458
	return 0;
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
{
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
	struct qla_hw_data *ha = vha->hw;
4459
	struct fc_port *sess;
4460
	u64 unpacked_lun;
4461
	int fn;
4462
	unsigned long flags;
4463 4464

	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4465 4466

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4467 4468
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    a->u.isp24.fcp_hdr.s_id);
4469 4470
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4471 4472
	unpacked_lun =
	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4473

4474
	if (sess == NULL || sess->deleted)
4475 4476
		return -EFAULT;

4477 4478 4479 4480 4481
	return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
}

/* ha->hardware_lock supposed to be held on entry */
static int __qlt_abort_task(struct scsi_qla_host *vha,
4482
	struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4483 4484 4485 4486
{
	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
	struct qla_hw_data *ha = vha->hw;
	struct qla_tgt_mgmt_cmd *mcmd;
4487
	u64 unpacked_lun;
4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502
	int rc;

	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
	if (mcmd == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
		    "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
		    vha->vp_idx, __func__);
		return -ENOMEM;
	}
	memset(mcmd, 0, sizeof(*mcmd));

	mcmd->sess = sess;
	memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
	    sizeof(mcmd->orig_iocb.imm_ntfy));

4503 4504
	unpacked_lun =
	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4505
	mcmd->reset_count = ha->base_qpair->chip_reset;
4506
	mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4507
	mcmd->qpair = ha->base_qpair;
4508

4509
	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526
	    le16_to_cpu(iocb->u.isp2x.seq_id));
	if (rc != 0) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
		    "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
		    vha->vp_idx, rc);
		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
		return -EFAULT;
	}

	return 0;
}

/* ha->hardware_lock supposed to be held on entry */
static int qlt_abort_task(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	struct qla_hw_data *ha = vha->hw;
4527
	struct fc_port *sess;
4528
	int loop_id;
4529
	unsigned long flags;
4530 4531 4532

	loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);

4533
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4534
	sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4535 4536
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

4537 4538 4539 4540
	if (sess == NULL) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
		    "qla_target(%d): task abort for unexisting "
		    "session\n", vha->vp_idx);
4541
		return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4542 4543 4544 4545 4546 4547
		    QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
	}

	return __qlt_abort_task(vha, iocb, sess);
}

4548 4549
void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
{
4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563
	if (rc != MBS_COMMAND_COMPLETE) {
		ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
			"%s: se_sess %p / sess %p from"
			" port %8phC loop_id %#04x s_id %02x:%02x:%02x"
			" LOGO failed: %#x\n",
			__func__,
			fcport->se_sess,
			fcport,
			fcport->port_name, fcport->loop_id,
			fcport->d_id.b.domain, fcport->d_id.b.area,
			fcport->d_id.b.al_pa, rc);
	}

	fcport->logout_completed = 1;
4564 4565 4566 4567 4568 4569 4570 4571 4572
}

/*
* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
*
* Schedules sessions with matching port_id/loop_id but different wwn for
* deletion. Returns existing session with matching wwn if present.
* Null otherwise.
*/
4573 4574
struct fc_port *
qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4575
    port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4576
{
4577
	struct fc_port *sess = NULL, *other_sess;
4578 4579
	uint64_t other_wwn;

4580 4581
	*conflict_sess = NULL;

4582
	list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4583 4584 4585 4586 4587 4588 4589 4590 4591 4592

		other_wwn = wwn_to_u64(other_sess->port_name);

		if (wwn == other_wwn) {
			WARN_ON(sess);
			sess = other_sess;
			continue;
		}

		/* find other sess with nport_id collision */
4593
		if (port_id.b24 == other_sess->d_id.b24) {
4594
			if (loop_id != other_sess->loop_id) {
4595
				ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4596 4597 4598 4599 4600 4601 4602 4603 4604
				    "Invalidating sess %p loop_id %d wwn %llx.\n",
				    other_sess, other_sess->loop_id, other_wwn);

				/*
				 * logout_on_delete is set by default, but another
				 * session that has the same s_id/loop_id combo
				 * might have cleared it when requested this session
				 * deletion, so don't touch it
				 */
4605
				qlt_schedule_sess_for_deletion(other_sess);
4606 4607 4608
			} else {
				/*
				 * Another wwn used to have our s_id/loop_id
4609
				 * kill the session, but don't free the loop_id
4610
				 */
4611
				ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4612 4613 4614
				    "Invalidating sess %p loop_id %d wwn %llx.\n",
				    other_sess, other_sess->loop_id, other_wwn);

4615
				other_sess->keep_nport_handle = 1;
4616 4617
				if (other_sess->disc_state != DSC_DELETED)
					*conflict_sess = other_sess;
4618
				qlt_schedule_sess_for_deletion(other_sess);
4619 4620 4621 4622 4623
			}
			continue;
		}

		/* find other sess with nport handle collision */
4624 4625 4626
		if ((loop_id == other_sess->loop_id) &&
			(loop_id != FC_NO_LOOP_ID)) {
			ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4627 4628 4629 4630 4631
			       "Invalidating sess %p loop_id %d wwn %llx.\n",
			       other_sess, other_sess->loop_id, other_wwn);

			/* Same loop_id but different s_id
			 * Ok to kill and logout */
4632
			qlt_schedule_sess_for_deletion(other_sess);
4633 4634 4635 4636 4637 4638
		}
	}

	return sess;
}

4639 4640 4641 4642 4643 4644 4645
/* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
{
	struct qla_tgt_sess_op *op;
	struct qla_tgt_cmd *cmd;
	uint32_t key;
	int count = 0;
4646
	unsigned long flags;
4647 4648 4649 4650 4651

	key = (((u32)s_id->b.domain << 16) |
	       ((u32)s_id->b.area   <<  8) |
	       ((u32)s_id->b.al_pa));

4652
	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4653 4654
	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4655

4656 4657 4658 4659 4660
		if (op_key == key) {
			op->aborted = true;
			count++;
		}
	}
4661 4662 4663 4664 4665 4666 4667 4668 4669

	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
		if (op_key == key) {
			op->aborted = true;
			count++;
		}
	}

4670 4671 4672
	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
		uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
		if (cmd_key == key) {
4673
			cmd->aborted = 1;
4674 4675 4676
			count++;
		}
	}
4677
	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4678 4679 4680 4681

	return count;
}

4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733
static int qlt_handle_login(struct scsi_qla_host *vha,
    struct imm_ntfy_from_isp *iocb)
{
	struct fc_port *sess = NULL, *conflict_sess = NULL;
	uint64_t wwn;
	port_id_t port_id;
	uint16_t loop_id, wd3_lo;
	int res = 0;
	struct qlt_plogi_ack_t *pla;
	unsigned long flags;

	wwn = wwn_to_u64(iocb->u.isp24.port_name);

	port_id.b.domain = iocb->u.isp24.port_id[2];
	port_id.b.area   = iocb->u.isp24.port_id[1];
	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
	port_id.b.rsvd_1 = 0;

	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);

	/* Mark all stale commands sitting in qla_tgt_wq for deletion */
	abort_cmds_for_s_id(vha, &port_id);

	if (wwn) {
		spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
		sess = qlt_find_sess_invalidate_other(vha, wwn,
		    port_id, loop_id, &conflict_sess);
		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
	}

	if (IS_SW_RESV_ADDR(port_id)) {
		res = 1;
		goto out;
	}

	pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
	if (!pla) {
		qlt_send_term_imm_notif(vha, iocb, 1);
		goto out;
	}

	if (conflict_sess) {
		conflict_sess->login_gen++;
		qlt_plogi_ack_link(vha, pla, conflict_sess,
		    QLT_PLOGI_LINK_CONFLICT);
	}

	if (!sess) {
		pla->ref_count++;
		ql_dbg(ql_dbg_disc, vha, 0xffff,
		    "%s %d %8phC post new sess\n",
		    __func__, __LINE__, iocb->u.isp24.port_name);
4734 4735 4736 4737 4738 4739 4740 4741 4742 4743
		if (iocb->u.isp24.status_subcode == ELS_PLOGI)
			qla24xx_post_newsess_work(vha, &port_id,
			    iocb->u.isp24.port_name,
			    iocb->u.isp24.u.plogi.node_name,
			    pla, FC4_TYPE_UNKNOWN);
		else
			qla24xx_post_newsess_work(vha, &port_id,
			    iocb->u.isp24.port_name, NULL,
			    pla, FC4_TYPE_UNKNOWN);

4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806
		goto out;
	}

	qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
	sess->d_id = port_id;
	sess->login_gen++;

	if (iocb->u.isp24.status_subcode == ELS_PRLI) {
		sess->fw_login_state = DSC_LS_PRLI_PEND;
		sess->local = 0;
		sess->loop_id = loop_id;
		sess->d_id = port_id;
		sess->fw_login_state = DSC_LS_PRLI_PEND;
		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);

		if (wd3_lo & BIT_7)
			sess->conf_compl_supported = 1;

		if ((wd3_lo & BIT_4) == 0)
			sess->port_type = FCT_INITIATOR;
		else
			sess->port_type = FCT_TARGET;

	} else
		sess->fw_login_state = DSC_LS_PLOGI_PEND;


	ql_dbg(ql_dbg_disc, vha, 0x20f9,
	    "%s %d %8phC  DS %d\n",
	    __func__, __LINE__, sess->port_name, sess->disc_state);

	switch (sess->disc_state) {
	case DSC_DELETED:
		qlt_plogi_ack_unref(vha, pla);
		break;

	default:
		/*
		 * Under normal circumstances we want to release nport handle
		 * during LOGO process to avoid nport handle leaks inside FW.
		 * The exception is when LOGO is done while another PLOGI with
		 * the same nport handle is waiting as might be the case here.
		 * Note: there is always a possibily of a race where session
		 * deletion has already started for other reasons (e.g. ACL
		 * removal) and now PLOGI arrives:
		 * 1. if PLOGI arrived in FW after nport handle has been freed,
		 *    FW must have assigned this PLOGI a new/same handle and we
		 *    can proceed ACK'ing it as usual when session deletion
		 *    completes.
		 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
		 *    bit reached it, the handle has now been released. We'll
		 *    get an error when we ACK this PLOGI. Nothing will be sent
		 *    back to initiator. Initiator should eventually retry
		 *    PLOGI and situation will correct itself.
		 */
		sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
		    (sess->d_id.b24 == port_id.b24));

		ql_dbg(ql_dbg_disc, vha, 0x20f9,
		    "%s %d %8phC post del sess\n",
		    __func__, __LINE__, sess->port_name);


4807
		qlt_schedule_sess_for_deletion(sess);
4808 4809 4810 4811 4812 4813
		break;
	}
out:
	return res;
}

4814 4815 4816 4817 4818 4819
/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
4820
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4821
	struct qla_hw_data *ha = vha->hw;
4822
	struct fc_port *sess = NULL, *conflict_sess = NULL;
4823 4824 4825 4826
	uint64_t wwn;
	port_id_t port_id;
	uint16_t loop_id;
	uint16_t wd3_lo;
4827
	int res = 0;
4828
	unsigned long flags;
4829

4830 4831 4832 4833 4834 4835 4836 4837 4838
	wwn = wwn_to_u64(iocb->u.isp24.port_name);

	port_id.b.domain = iocb->u.isp24.port_id[2];
	port_id.b.area   = iocb->u.isp24.port_id[1];
	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
	port_id.b.rsvd_1 = 0;

	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);

4839 4840 4841 4842 4843 4844
	ql_dbg(ql_dbg_disc, vha, 0xf026,
	    "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
	    vha->vp_idx, iocb->u.isp24.port_id[2],
		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
		   iocb->u.isp24.status_subcode, loop_id,
		iocb->u.isp24.port_name);
4845

4846 4847 4848
	/* res = 1 means ack at the end of thread
	 * res = 0 means ack async/later.
	 */
4849 4850
	switch (iocb->u.isp24.status_subcode) {
	case ELS_PLOGI:
4851 4852
		res = qlt_handle_login(vha, iocb);
		break;
4853

4854 4855 4856 4857
	case ELS_PRLI:
		if (N2N_TOPO(ha)) {
			sess = qla2x00_find_fcport_by_wwpn(vha,
			    iocb->u.isp24.port_name, 1);
4858

4859 4860 4861 4862 4863 4864 4865 4866
			if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
				ql_dbg(ql_dbg_disc, vha, 0xffff,
				    "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
				    __func__, __LINE__,
				    iocb->u.isp24.port_name);
				qlt_send_term_imm_notif(vha, iocb, 1);
				break;
			}
4867

4868
			res = qlt_handle_login(vha, iocb);
4869 4870 4871
			break;
		}

4872 4873 4874 4875 4876
		if (IS_SW_RESV_ADDR(port_id)) {
			res = 1;
			break;
		}

4877 4878
		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);

4879 4880
		if (wwn) {
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4881 4882
			sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
				loop_id, &conflict_sess);
4883 4884
			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
		}
4885 4886

		if (conflict_sess) {
4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900
			switch (conflict_sess->disc_state) {
			case DSC_DELETED:
			case DSC_DELETE_PEND:
				break;
			default:
				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
				    "PRLI with conflicting sess %p port %8phC\n",
				    conflict_sess, conflict_sess->port_name);
				conflict_sess->fw_login_state =
				    DSC_LS_PORT_UNAVAIL;
				qlt_send_term_imm_notif(vha, iocb, 1);
				res = 0;
				break;
			}
4901
		}
4902 4903

		if (sess != NULL) {
4904
			bool delete = false;
4905 4906
			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
			switch (sess->fw_login_state) {
4907
			case DSC_LS_PLOGI_PEND:
4908 4909 4910 4911
			case DSC_LS_PLOGI_COMP:
			case DSC_LS_PRLI_COMP:
				break;
			default:
4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928
				delete = true;
				break;
			}

			switch (sess->disc_state) {
			case DSC_LOGIN_PEND:
			case DSC_GPDB:
			case DSC_UPD_FCPORT:
			case DSC_LOGIN_COMPLETE:
			case DSC_ADISC:
				delete = false;
				break;
			default:
				break;
			}

			if (delete) {
4929 4930
				spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
				    flags);
4931 4932 4933 4934 4935
				/*
				 * Impatient initiator sent PRLI before last
				 * PLOGI could finish. Will force him to re-try,
				 * while last one finishes.
				 */
4936
				ql_log(ql_log_warn, sess->vha, 0xf095,
4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947
				    "sess %p PRLI received, before plogi ack.\n",
				    sess);
				qlt_send_term_imm_notif(vha, iocb, 1);
				res = 0;
				break;
			}

			/*
			 * This shouldn't happen under normal circumstances,
			 * since we have deleted the old session during PLOGI
			 */
4948
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4949 4950 4951 4952 4953
			    "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
			    sess->loop_id, sess, iocb->u.isp24.nport_handle);

			sess->local = 0;
			sess->loop_id = loop_id;
4954
			sess->d_id = port_id;
4955
			sess->fw_login_state = DSC_LS_PRLI_PEND;
4956 4957 4958 4959

			if (wd3_lo & BIT_7)
				sess->conf_compl_supported = 1;

4960 4961 4962 4963
			if ((wd3_lo & BIT_4) == 0)
				sess->port_type = FCT_INITIATOR;
			else
				sess->port_type = FCT_TARGET;
4964 4965

			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4966 4967 4968 4969 4970
		}
		res = 1; /* send notify ack */

		/* Make session global (not used in fabric mode) */
		if (ha->current_topology != ISP_CFG_F) {
4971
			if (sess) {
4972
				ql_dbg(ql_dbg_disc, vha, 0x20fa,
4973 4974 4975 4976 4977 4978 4979 4980 4981 4982
				    "%s %d %8phC post nack\n",
				    __func__, __LINE__, sess->port_name);
				qla24xx_post_nack_work(vha, sess, iocb,
					SRB_NACK_PRLI);
				res = 0;
			} else {
				set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
				qla2xxx_wake_dpc(vha);
			}
4983
		} else {
4984
			if (sess) {
4985
				ql_dbg(ql_dbg_disc, vha, 0x20fb,
4986 4987
				    "%s %d %8phC post nack\n",
				    __func__, __LINE__, sess->port_name);
4988 4989 4990 4991 4992
				qla24xx_post_nack_work(vha, sess, iocb,
					SRB_NACK_PRLI);
				res = 0;
			}
		}
4993 4994
		break;

4995 4996 4997 4998 4999 5000 5001 5002
	case ELS_TPRLO:
		if (le16_to_cpu(iocb->u.isp24.flags) &
			NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
			loop_id = 0xFFFF;
			qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
			res = 1;
			break;
		}
5003
		/* fall through */
5004 5005
	case ELS_LOGO:
	case ELS_PRLO:
5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
		sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

		if (sess) {
			sess->login_gen++;
			sess->fw_login_state = DSC_LS_LOGO_PEND;
			sess->logo_ack_needed = 1;
			memcpy(sess->iocb, iocb, IOCB_SIZE);
		}

5017
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5018

5019
		ql_dbg(ql_dbg_disc, vha, 0x20fc,
5020 5021 5022
		    "%s: logo %llx res %d sess %p ",
		    __func__, wwn, res, sess);
		if (res == 0) {
5023 5024 5025 5026
			/*
			 * cmd went upper layer, look for qlt_xmit_tm_rsp()
			 * for LOGO_ACK & sess delete
			 */
5027 5028 5029
			BUG_ON(!sess);
			res = 0;
		} else {
5030
			/* cmd did not go to upper layer. */
5031
			if (sess) {
5032
				qlt_schedule_sess_for_deletion(sess);
5033 5034 5035 5036
				res = 0;
			}
			/* else logo will be ack */
		}
5037 5038 5039 5040
		break;
	case ELS_PDISC:
	case ELS_ADISC:
	{
5041
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5042
		if (tgt->link_reinit_iocb_pending) {
5043 5044
			qlt_send_notify_ack(ha->base_qpair,
			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5045 5046
			tgt->link_reinit_iocb_pending = 0;
		}
5047 5048 5049 5050

		sess = qla2x00_find_fcport_by_wwpn(vha,
		    iocb->u.isp24.port_name, 1);
		if (sess) {
5051
			ql_dbg(ql_dbg_disc, vha, 0x20fd,
5052 5053 5054 5055 5056
				"sess %p lid %d|%d DS %d LS %d\n",
				sess, sess->loop_id, loop_id,
				sess->disc_state, sess->fw_login_state);
		}

5057 5058 5059 5060
		res = 1; /* send notify ack */
		break;
	}

5061
	case ELS_FLOGI:	/* should never happen */
5062 5063 5064 5065 5066 5067 5068 5069
	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
		    "qla_target(%d): Unsupported ELS command %x "
		    "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
		break;
	}

5070 5071 5072 5073
	ql_dbg(ql_dbg_disc, vha, 0xf026,
	    "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
	    vha->vp_idx, iocb->u.isp24.status_subcode, res);

5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103
	return res;
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
	struct imm_ntfy_from_isp *iocb)
{
	struct qla_hw_data *ha = vha->hw;
	uint32_t add_flags = 0;
	int send_notify_ack = 1;
	uint16_t status;

	status = le16_to_cpu(iocb->u.isp2x.status);
	switch (status) {
	case IMM_NTFY_LIP_RESET:
	{
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
		    "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
		    vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
		    iocb->u.isp24.status_subcode);

		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
			send_notify_ack = 0;
		break;
	}

	case IMM_NTFY_LIP_LINK_REINIT:
	{
5104
		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5105 5106 5107 5108 5109 5110
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
		    "qla_target(%d): LINK REINIT (loop %#x, "
		    "subcode %x)\n", vha->vp_idx,
		    le16_to_cpu(iocb->u.isp24.nport_handle),
		    iocb->u.isp24.status_subcode);
		if (tgt->link_reinit_iocb_pending) {
5111 5112
			qlt_send_notify_ack(ha->base_qpair,
			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203
		}
		memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
		tgt->link_reinit_iocb_pending = 1;
		/*
		 * QLogic requires to wait after LINK REINIT for possible
		 * PDISC or ADISC ELS commands
		 */
		send_notify_ack = 0;
		break;
	}

	case IMM_NTFY_PORT_LOGOUT:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
		    "qla_target(%d): Port logout (loop "
		    "%#x, subcode %x)\n", vha->vp_idx,
		    le16_to_cpu(iocb->u.isp24.nport_handle),
		    iocb->u.isp24.status_subcode);

		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
			send_notify_ack = 0;
		/* The sessions will be cleared in the callback, if needed */
		break;

	case IMM_NTFY_GLBL_TPRLO:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
		    "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
			send_notify_ack = 0;
		/* The sessions will be cleared in the callback, if needed */
		break;

	case IMM_NTFY_PORT_CONFIG:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
		    "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
		    status);
		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
			send_notify_ack = 0;
		/* The sessions will be cleared in the callback, if needed */
		break;

	case IMM_NTFY_GLBL_LOGO:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
		    "qla_target(%d): Link failure detected\n",
		    vha->vp_idx);
		/* I_T nexus loss */
		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
			send_notify_ack = 0;
		break;

	case IMM_NTFY_IOCB_OVERFLOW:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
		    "qla_target(%d): Cannot provide requested "
		    "capability (IOCB overflowed the immediate notify "
		    "resource count)\n", vha->vp_idx);
		break;

	case IMM_NTFY_ABORT_TASK:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
		    "qla_target(%d): Abort Task (S %08x I %#x -> "
		    "L %#x)\n", vha->vp_idx,
		    le16_to_cpu(iocb->u.isp2x.seq_id),
		    GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
		    le16_to_cpu(iocb->u.isp2x.lun));
		if (qlt_abort_task(vha, iocb) == 0)
			send_notify_ack = 0;
		break;

	case IMM_NTFY_RESOURCE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
		    "qla_target(%d): Out of resources, host %ld\n",
		    vha->vp_idx, vha->host_no);
		break;

	case IMM_NTFY_MSG_RX:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
		    "qla_target(%d): Immediate notify task %x\n",
		    vha->vp_idx, iocb->u.isp2x.task_flags);
		break;

	case IMM_NTFY_ELS:
		if (qlt_24xx_handle_els(vha, iocb) == 0)
			send_notify_ack = 0;
		break;
	default:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
		    "qla_target(%d): Received unknown immediate "
		    "notify status %x\n", vha->vp_idx, status);
		break;
	}

	if (send_notify_ack)
5204 5205
		qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
		    0, 0);
5206 5207 5208 5209 5210 5211
}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 * This function sends busy to ISP 2xxx or 24xx.
 */
5212
static int __qlt_send_busy(struct qla_qpair *qpair,
5213 5214
	struct atio_from_isp *atio, uint16_t status)
{
5215
	struct scsi_qla_host *vha = qpair->vha;
5216 5217 5218
	struct ctio7_to_24xx *ctio24;
	struct qla_hw_data *ha = vha->hw;
	request_t *pkt;
5219
	struct fc_port *sess = NULL;
5220
	unsigned long flags;
5221
	u16 temp;
5222 5223 5224 5225 5226 5227
	port_id_t id;

	id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
	id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
	id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
	id.b.rsvd_1 = 0;
5228

5229
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5230
	sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5231
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5232
	if (!sess) {
5233
		qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5234
		return 0;
5235 5236 5237
	}
	/* Sending marker isn't necessary, since we called from ISR */

5238
	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5239
	if (!pkt) {
5240
		ql_dbg(ql_dbg_io, vha, 0x3063,
5241 5242
		    "qla_target(%d): %s failed: unable to allocate "
		    "request packet", vha->vp_idx, __func__);
5243
		return -ENOMEM;
5244 5245
	}

5246
	qpair->tgt_counters.num_q_full_sent++;
5247 5248 5249 5250 5251 5252
	pkt->entry_count = 1;
	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;

	ctio24 = (struct ctio7_to_24xx *)pkt;
	ctio24->entry_type = CTIO_TYPE7;
	ctio24->nport_handle = sess->loop_id;
5253
	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5254 5255 5256 5257 5258
	ctio24->vp_index = vha->vp_idx;
	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5259
	temp = (atio->u.isp24.attr << 9) |
5260
		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5261 5262
		CTIO7_FLAGS_DONT_RET_CTIO;
	ctio24->u.status1.flags = cpu_to_le16(temp);
5263 5264 5265 5266 5267 5268
	/*
	 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
	 * if the explicit conformation is used.
	 */
	ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
	ctio24->u.status1.scsi_status = cpu_to_le16(status);
5269 5270 5271 5272 5273 5274

	ctio24->u.status1.residual = get_datalen_for_atio(atio);

	if (ctio24->u.status1.residual != 0)
		ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;

5275 5276
	/* Memory Barrier */
	wmb();
5277 5278 5279 5280
	if (qpair->reqq_start_iocbs)
		qpair->reqq_start_iocbs(qpair);
	else
		qla2x00_start_iocbs(vha, qpair->req);
5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294
	return 0;
}

/*
 * This routine is used to allocate a command for either a QFull condition
 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
 * out previously.
 */
static void
qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
	struct atio_from_isp *atio, uint16_t status, int qfull)
{
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
	struct qla_hw_data *ha = vha->hw;
5295
	struct fc_port *sess;
5296 5297
	struct se_session *se_sess;
	struct qla_tgt_cmd *cmd;
5298
	int tag, cpu;
5299
	unsigned long flags;
5300 5301 5302 5303 5304 5305 5306 5307 5308 5309

	if (unlikely(tgt->tgt_stop)) {
		ql_dbg(ql_dbg_io, vha, 0x300a,
			"New command while device %p is shutting down\n", tgt);
		return;
	}

	if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
		vha->hw->tgt.num_qfull_cmds_dropped++;
		if (vha->hw->tgt.num_qfull_cmds_dropped >
5310 5311
			vha->qla_stats.stat_max_qfull_cmds_dropped)
			vha->qla_stats.stat_max_qfull_cmds_dropped =
5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329
				vha->hw->tgt.num_qfull_cmds_dropped;

		ql_dbg(ql_dbg_io, vha, 0x3068,
			"qla_target(%d): %s: QFull CMD dropped[%d]\n",
			vha->vp_idx, __func__,
			vha->hw->tgt.num_qfull_cmds_dropped);

		qlt_chk_exch_leak_thresh_hold(vha);
		return;
	}

	sess = ha->tgt.tgt_ops->find_sess_by_s_id
		(vha, atio->u.isp24.fcp_hdr.s_id);
	if (!sess)
		return;

	se_sess = sess->se_sess;

5330
	tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341
	if (tag < 0)
		return;

	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
	if (!cmd) {
		ql_dbg(ql_dbg_io, vha, 0x3009,
			"qla_target(%d): %s: Allocation of cmd failed\n",
			vha->vp_idx, __func__);

		vha->hw->tgt.num_qfull_cmds_dropped++;
		if (vha->hw->tgt.num_qfull_cmds_dropped >
5342 5343
			vha->qla_stats.stat_max_qfull_cmds_dropped)
			vha->qla_stats.stat_max_qfull_cmds_dropped =
5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357
				vha->hw->tgt.num_qfull_cmds_dropped;

		qlt_chk_exch_leak_thresh_hold(vha);
		return;
	}

	memset(cmd, 0, sizeof(struct qla_tgt_cmd));

	qlt_incr_num_pend_cmds(vha);
	INIT_LIST_HEAD(&cmd->cmd_list);
	memcpy(&cmd->atio, atio, sizeof(*atio));

	cmd->tgt = vha->vha_tgt.qla_tgt;
	cmd->vha = vha;
5358
	cmd->reset_count = ha->base_qpair->chip_reset;
5359
	cmd->q_full = 1;
5360
	cmd->qpair = ha->base_qpair;
5361
	cmd->se_cmd.map_cpu = cpu;
5362 5363 5364 5365 5366 5367 5368 5369

	if (qfull) {
		cmd->q_full = 1;
		/* NOTE: borrowing the state field to carry the status */
		cmd->state = status;
	} else
		cmd->term_exchg = 1;

5370
	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5371 5372 5373 5374
	list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);

	vha->hw->tgt.num_qfull_cmds_alloc++;
	if (vha->hw->tgt.num_qfull_cmds_alloc >
5375 5376
		vha->qla_stats.stat_max_qfull_cmds_alloc)
		vha->qla_stats.stat_max_qfull_cmds_alloc =
5377
			vha->hw->tgt.num_qfull_cmds_alloc;
5378
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5379 5380 5381
}

int
5382
qlt_free_qfull_cmds(struct qla_qpair *qpair)
5383
{
5384
	struct scsi_qla_host *vha = qpair->vha;
5385 5386 5387
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;
	struct qla_tgt_cmd *cmd, *tcmd;
5388
	struct list_head free_list, q_full_list;
5389 5390 5391 5392 5393 5394
	int rc = 0;

	if (list_empty(&ha->tgt.q_full_list))
		return 0;

	INIT_LIST_HEAD(&free_list);
5395
	INIT_LIST_HEAD(&q_full_list);
5396

5397
	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5398
	if (list_empty(&ha->tgt.q_full_list)) {
5399
		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5400 5401 5402
		return 0;
	}

5403 5404 5405 5406 5407
	list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);

	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
	list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5408 5409
		if (cmd->q_full)
			/* cmd->state is a borrowed field to hold status */
5410
			rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5411
		else if (cmd->term_exchg)
5412
			rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435

		if (rc == -ENOMEM)
			break;

		if (cmd->q_full)
			ql_dbg(ql_dbg_io, vha, 0x3006,
			    "%s: busy sent for ox_id[%04x]\n", __func__,
			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
		else if (cmd->term_exchg)
			ql_dbg(ql_dbg_io, vha, 0x3007,
			    "%s: Term exchg sent for ox_id[%04x]\n", __func__,
			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
		else
			ql_dbg(ql_dbg_io, vha, 0x3008,
			    "%s: Unexpected cmd in QFull list %p\n", __func__,
			    cmd);

		list_del(&cmd->cmd_list);
		list_add_tail(&cmd->cmd_list, &free_list);

		/* piggy back on hardware_lock for protection */
		vha->hw->tgt.num_qfull_cmds_alloc--;
	}
5436
	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5437 5438 5439 5440 5441 5442 5443 5444 5445 5446

	cmd = NULL;

	list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
		list_del(&cmd->cmd_list);
		/* This cmd was never sent to TCM.  There is no need
		 * to schedule free or call free_cmd
		 */
		qlt_free_cmd(cmd);
	}
5447 5448 5449 5450 5451 5452 5453

	if (!list_empty(&q_full_list)) {
		spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
		list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
	}

5454 5455 5456 5457
	return rc;
}

static void
5458 5459
qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
    uint16_t status)
5460 5461
{
	int rc = 0;
5462
	struct scsi_qla_host *vha = qpair->vha;
5463

5464
	rc = __qlt_send_busy(qpair, atio, status);
5465 5466 5467 5468 5469
	if (rc == -ENOMEM)
		qlt_alloc_qfull_cmd(vha, atio, status, 1);
}

static int
5470 5471
qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
	struct atio_from_isp *atio, uint8_t ha_locked)
5472 5473
{
	struct qla_hw_data *ha = vha->hw;
5474
	unsigned long flags;
5475 5476 5477 5478

	if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
		return 0;

5479 5480
	if (!ha_locked)
		spin_lock_irqsave(&ha->hardware_lock, flags);
5481
	qlt_send_busy(qpair, atio, qla_sam_status);
5482 5483 5484
	if (!ha_locked)
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

5485
	return 1;
5486 5487 5488 5489 5490
}

/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5491
	struct atio_from_isp *atio, uint8_t ha_locked)
5492 5493
{
	struct qla_hw_data *ha = vha->hw;
5494
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5495
	int rc;
5496
	unsigned long flags = 0;
5497 5498

	if (unlikely(tgt == NULL)) {
5499
		ql_dbg(ql_dbg_tgt, vha, 0x3064,
5500 5501 5502 5503 5504 5505 5506 5507
		    "ATIO pkt, but no tgt (ha %p)", ha);
		return;
	}
	/*
	 * In tgt_stop mode we also should allow all requests to pass.
	 * Otherwise, some commands can stuck.
	 */

5508
	tgt->atio_irq_cmd_count++;
5509 5510 5511 5512 5513

	switch (atio->u.raw.entry_type) {
	case ATIO_TYPE7:
		if (unlikely(atio->u.isp24.exchange_addr ==
		    ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5514
			ql_dbg(ql_dbg_io, vha, 0x3065,
5515 5516 5517
			    "qla_target(%d): ATIO_TYPE7 "
			    "received with UNKNOWN exchange address, "
			    "sending QUEUE_FULL\n", vha->vp_idx);
5518 5519
			if (!ha_locked)
				spin_lock_irqsave(&ha->hardware_lock, flags);
5520
			qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5521
			if (!ha_locked)
5522 5523
				spin_unlock_irqrestore(&ha->hardware_lock,
				    flags);
5524 5525
			break;
		}
5526 5527

		if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5528 5529
			rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
			    atio, ha_locked);
5530
			if (rc != 0) {
5531
				tgt->atio_irq_cmd_count--;
5532 5533
				return;
			}
5534
			rc = qlt_handle_cmd_for_atio(vha, atio);
5535
		} else {
5536
			rc = qlt_handle_task_mgmt(vha, atio);
5537
		}
5538
		if (unlikely(rc != 0)) {
5539 5540 5541 5542 5543 5544 5545 5546 5547 5548
			if (!ha_locked)
				spin_lock_irqsave(&ha->hardware_lock, flags);
			switch (rc) {
			case -ENODEV:
				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
				    "qla_target: Unable to send command to target\n");
				break;
			case -EBADF:
				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
				    "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5549 5550
				qlt_send_term_exchange(ha->base_qpair, NULL,
				    atio, 1, 0);
5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565
				break;
			case -EBUSY:
				ql_dbg(ql_dbg_tgt, vha, 0xe060,
				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
				    vha->vp_idx);
				qlt_send_busy(ha->base_qpair, atio,
				    tc_sam_status);
				break;
			default:
				ql_dbg(ql_dbg_tgt, vha, 0xe060,
				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
				    vha->vp_idx);
				qlt_send_busy(ha->base_qpair, atio,
				    qla_sam_status);
				break;
5566
			}
5567 5568 5569
			if (!ha_locked)
				spin_unlock_irqrestore(&ha->hardware_lock,
				    flags);
5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583
		}
		break;

	case IMMED_NOTIFY_TYPE:
	{
		if (unlikely(atio->u.isp2x.entry_status != 0)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe05b,
			    "qla_target(%d): Received ATIO packet %x "
			    "with error status %x\n", vha->vp_idx,
			    atio->u.raw.entry_type,
			    atio->u.isp2x.entry_status);
			break;
		}
		ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5584 5585 5586

		if (!ha_locked)
			spin_lock_irqsave(&ha->hardware_lock, flags);
5587
		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5588 5589
		if (!ha_locked)
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
5590 5591 5592 5593 5594 5595 5596 5597 5598 5599
		break;
	}

	default:
		ql_dbg(ql_dbg_tgt, vha, 0xe05c,
		    "qla_target(%d): Received unknown ATIO atio "
		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
		break;
	}

5600
	tgt->atio_irq_cmd_count--;
5601 5602 5603 5604
}

/* ha->hardware_lock supposed to be held on entry */
/* called via callback from qla2xxx */
5605 5606
static void qlt_response_pkt(struct scsi_qla_host *vha,
	struct rsp_que *rsp, response_t *pkt)
5607
{
5608
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5609 5610 5611

	if (unlikely(tgt == NULL)) {
		ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5612 5613
		    "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
		    vha->vp_idx, pkt->entry_type, vha->hw);
5614 5615 5616 5617 5618 5619 5620 5621 5622
		return;
	}

	/*
	 * In tgt_stop mode we also should allow all requests to pass.
	 * Otherwise, some commands can stuck.
	 */

	switch (pkt->entry_type) {
5623
	case CTIO_CRC2:
5624 5625 5626
	case CTIO_TYPE7:
	{
		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5627
		qlt_do_ctio_completion(vha, rsp, entry->handle,
5628 5629 5630 5631 5632 5633 5634 5635 5636 5637
		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
		    entry);
		break;
	}

	case ACCEPT_TGT_IO_TYPE:
	{
		struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
		int rc;
		if (atio->u.isp2x.status !=
5638
		    cpu_to_le16(ATIO_CDB_VALID)) {
5639 5640 5641 5642 5643 5644 5645
			ql_dbg(ql_dbg_tgt, vha, 0xe05e,
			    "qla_target(%d): ATIO with error "
			    "status %x received\n", vha->vp_idx,
			    le16_to_cpu(atio->u.isp2x.status));
			break;
		}

5646
		rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5647
		if (rc != 0)
5648 5649
			return;

5650 5651
		rc = qlt_handle_cmd_for_atio(vha, atio);
		if (unlikely(rc != 0)) {
5652 5653 5654 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676
			switch (rc) {
			case -ENODEV:
				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
				    "qla_target: Unable to send command to target\n");
				break;
			case -EBADF:
				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
				    "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
				qlt_send_term_exchange(rsp->qpair, NULL,
				    atio, 1, 0);
				break;
			case -EBUSY:
				ql_dbg(ql_dbg_tgt, vha, 0xe060,
				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
				    vha->vp_idx);
				qlt_send_busy(rsp->qpair, atio,
				    tc_sam_status);
				break;
			default:
				ql_dbg(ql_dbg_tgt, vha, 0xe060,
				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
				    vha->vp_idx);
				qlt_send_busy(rsp->qpair, atio,
				    qla_sam_status);
				break;
5677 5678 5679 5680 5681 5682 5683 5684
			}
		}
	}
	break;

	case CONTINUE_TGT_IO_TYPE:
	{
		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5685
		qlt_do_ctio_completion(vha, rsp, entry->handle,
5686 5687 5688 5689 5690 5691 5692 5693
		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
		    entry);
		break;
	}

	case CTIO_A64_TYPE:
	{
		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5694
		qlt_do_ctio_completion(vha, rsp, entry->handle,
5695 5696 5697 5698 5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713
		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
		    entry);
		break;
	}

	case IMMED_NOTIFY_TYPE:
		ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
		break;

	case NOTIFY_ACK_TYPE:
		if (tgt->notify_ack_expected > 0) {
			struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
			ql_dbg(ql_dbg_tgt, vha, 0xe036,
			    "NOTIFY_ACK seq %08x status %x\n",
			    le16_to_cpu(entry->u.isp2x.seq_id),
			    le16_to_cpu(entry->u.isp2x.status));
			tgt->notify_ack_expected--;
			if (entry->u.isp2x.status !=
5714
			    cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5715 5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792
				ql_dbg(ql_dbg_tgt, vha, 0xe061,
				    "qla_target(%d): NOTIFY_ACK "
				    "failed %x\n", vha->vp_idx,
				    le16_to_cpu(entry->u.isp2x.status));
			}
		} else {
			ql_dbg(ql_dbg_tgt, vha, 0xe062,
			    "qla_target(%d): Unexpected NOTIFY_ACK received\n",
			    vha->vp_idx);
		}
		break;

	case ABTS_RECV_24XX:
		ql_dbg(ql_dbg_tgt, vha, 0xe037,
		    "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
		qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
		break;

	case ABTS_RESP_24XX:
		if (tgt->abts_resp_expected > 0) {
			struct abts_resp_from_24xx_fw *entry =
				(struct abts_resp_from_24xx_fw *)pkt;
			ql_dbg(ql_dbg_tgt, vha, 0xe038,
			    "ABTS_RESP_24XX: compl_status %x\n",
			    entry->compl_status);
			tgt->abts_resp_expected--;
			if (le16_to_cpu(entry->compl_status) !=
			    ABTS_RESP_COMPL_SUCCESS) {
				if ((entry->error_subcode1 == 0x1E) &&
				    (entry->error_subcode2 == 0)) {
					/*
					 * We've got a race here: aborted
					 * exchange not terminated, i.e.
					 * response for the aborted command was
					 * sent between the abort request was
					 * received and processed.
					 * Unfortunately, the firmware has a
					 * silly requirement that all aborted
					 * exchanges must be explicitely
					 * terminated, otherwise it refuses to
					 * send responses for the abort
					 * requests. So, we have to
					 * (re)terminate the exchange and retry
					 * the abort response.
					 */
					qlt_24xx_retry_term_exchange(vha,
					    entry);
				} else
					ql_dbg(ql_dbg_tgt, vha, 0xe063,
					    "qla_target(%d): ABTS_RESP_24XX "
					    "failed %x (subcode %x:%x)",
					    vha->vp_idx, entry->compl_status,
					    entry->error_subcode1,
					    entry->error_subcode2);
			}
		} else {
			ql_dbg(ql_dbg_tgt, vha, 0xe064,
			    "qla_target(%d): Unexpected ABTS_RESP_24XX "
			    "received\n", vha->vp_idx);
		}
		break;

	default:
		ql_dbg(ql_dbg_tgt, vha, 0xe065,
		    "qla_target(%d): Received unknown response pkt "
		    "type %x\n", vha->vp_idx, pkt->entry_type);
		break;
	}

}

/*
 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 */
void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
	uint16_t *mailbox)
{
	struct qla_hw_data *ha = vha->hw;
5793
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5794
	int login_code;
5795

5796
	if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814
		return;

	if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
	    IS_QLA2100(ha))
		return;
	/*
	 * In tgt_stop mode we also should allow all requests to pass.
	 * Otherwise, some commands can stuck.
	 */


	switch (code) {
	case MBA_RESET:			/* Reset */
	case MBA_SYSTEM_ERR:		/* System Error */
	case MBA_REQ_TRANSFER_ERR:	/* Request Transfer Error */
	case MBA_RSP_TRANSFER_ERR:	/* Response Transfer Error */
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
		    "qla_target(%d): System error async event %#x "
5815
		    "occurred", vha->vp_idx, code);
5816 5817 5818 5819 5820 5821 5822 5823
		break;
	case MBA_WAKEUP_THRES:		/* Request Queue Wake-up. */
		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		break;

	case MBA_LOOP_UP:
	{
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5824
		    "qla_target(%d): Async LOOP_UP occurred "
5825 5826 5827
		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5828
		if (tgt->link_reinit_iocb_pending) {
5829 5830
			qlt_send_notify_ack(ha->base_qpair,
			    (void *)&tgt->link_reinit_iocb,
5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841
			    0, 0, 0, 0, 0, 0);
			tgt->link_reinit_iocb_pending = 0;
		}
		break;
	}

	case MBA_LIP_OCCURRED:
	case MBA_LOOP_DOWN:
	case MBA_LIP_RESET:
	case MBA_RSCN_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5842
		    "qla_target(%d): Async event %#x occurred "
5843 5844 5845
		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5846 5847
		break;

5848
	case MBA_REJECTED_FCP_CMD:
5849 5850 5851 5852 5853
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
		    "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
		    vha->vp_idx,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5854 5855 5856 5857 5858

		if (le16_to_cpu(mailbox[3]) == 1) {
			/* exchange starvation. */
			vha->hw->exch_starvation++;
			if (vha->hw->exch_starvation > 5) {
5859
				ql_log(ql_log_warn, vha, 0xd03a,
5860 5861 5862 5863 5864 5865 5866 5867 5868 5869 5870 5871 5872 5873
				    "Exchange starvation-. Resetting RISC\n");

				vha->hw->exch_starvation = 0;
				if (IS_P3P_TYPE(vha->hw))
					set_bit(FCOE_CTX_RESET_NEEDED,
					    &vha->dpc_flags);
				else
					set_bit(ISP_ABORT_NEEDED,
					    &vha->dpc_flags);
				qla2xxx_wake_dpc(vha);
			}
		}
		break;

5874 5875 5876
	case MBA_PORT_UPDATE:
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
		    "qla_target(%d): Port update async event %#x "
5877
		    "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5878 5879 5880 5881 5882
		    "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));

		login_code = le16_to_cpu(mailbox[2]);
5883
		if (login_code == 0x4) {
5884 5885
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
			    "Async MB 2: Got PLOGI Complete\n");
5886 5887
			vha->hw->exch_starvation = 0;
		} else if (login_code == 0x7)
5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
			    "Async MB 2: Port Logged Out\n");
		break;
	default:
		break;
	}

}

static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
	uint16_t loop_id)
{
5900
	fc_port_t *fcport, *tfcp, *del;
5901
	int rc;
5902 5903
	unsigned long flags;
	u8 newfcport = 0;
5904

5905
	fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5906 5907 5908 5909 5910 5911 5912 5913 5914
	if (!fcport) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
		    "qla_target(%d): Allocation of tmp FC port failed",
		    vha->vp_idx);
		return NULL;
	}

	fcport->loop_id = loop_id;

5915
	rc = qla24xx_gpdb_wait(vha, fcport, 0);
5916 5917 5918 5919 5920 5921 5922 5923 5924
	if (rc != QLA_SUCCESS) {
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
		    "qla_target(%d): Failed to retrieve fcport "
		    "information -- get_port_database() returned %x "
		    "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
		kfree(fcport);
		return NULL;
	}

5925 5926 5927 5928 5929 5930 5931 5932 5933
	del = NULL;
	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
	tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);

	if (tfcp) {
		tfcp->d_id = fcport->d_id;
		tfcp->port_type = fcport->port_type;
		tfcp->supported_classes = fcport->supported_classes;
		tfcp->flags |= fcport->flags;
5934
		tfcp->scan_state = QLA_FCPORT_FOUND;
5935 5936 5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958

		del = fcport;
		fcport = tfcp;
	} else {
		if (vha->hw->current_topology == ISP_CFG_F)
			fcport->flags |= FCF_FABRIC_DEVICE;

		list_add_tail(&fcport->list, &vha->vp_fcports);
		if (!IS_SW_RESV_ADDR(fcport->d_id))
		   vha->fcport_count++;
		fcport->login_gen++;
		fcport->disc_state = DSC_LOGIN_COMPLETE;
		fcport->login_succ = 1;
		newfcport = 1;
	}

	fcport->deleted = 0;
	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);

	switch (vha->host->active_mode) {
	case MODE_INITIATOR:
	case MODE_DUAL:
		if (newfcport) {
			if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5959
				ql_dbg(ql_dbg_disc, vha, 0x20fe,
5960 5961 5962 5963
				   "%s %d %8phC post upd_fcport fcp_cnt %d\n",
				   __func__, __LINE__, fcport->port_name, vha->fcport_count);
				qla24xx_post_upd_fcport_work(vha, fcport);
			} else {
5964
				ql_dbg(ql_dbg_disc, vha, 0x20ff,
5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975 5976 5977 5978
				   "%s %d %8phC post gpsc fcp_cnt %d\n",
				   __func__, __LINE__, fcport->port_name, vha->fcport_count);
				qla24xx_post_gpsc_work(vha, fcport);
			}
		}
		break;

	case MODE_TARGET:
	default:
		break;
	}
	if (del)
		qla2x00_free_fcport(del);

5979 5980 5981 5982
	return fcport;
}

/* Must be called under tgt_mutex */
5983
static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5984 5985
	uint8_t *s_id)
{
5986
	struct fc_port *sess = NULL;
5987 5988 5989 5990
	fc_port_t *fcport = NULL;
	int rc, global_resets;
	uint16_t loop_id = 0;

5991 5992 5993 5994 5995 5996 5997 5998 5999 6000 6001
	if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
		/*
		 * This is Domain Controller, so it should be
		 * OK to drop SCSI commands from it.
		 */
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
		    "Unable to find initiator with S_ID %x:%x:%x",
		    s_id[0], s_id[1], s_id[2]);
		return NULL;
	}

6002 6003
	mutex_lock(&vha->vha_tgt.tgt_mutex);

6004
retry:
6005 6006
	global_resets =
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6007 6008 6009

	rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
	if (rc != 0) {
6010 6011
		mutex_unlock(&vha->vha_tgt.tgt_mutex);

6012 6013 6014 6015 6016
		ql_log(ql_log_info, vha, 0xf071,
		    "qla_target(%d): Unable to find "
		    "initiator with S_ID %x:%x:%x",
		    vha->vp_idx, s_id[0], s_id[1],
		    s_id[2]);
6017 6018 6019 6020 6021 6022 6023 6024

		if (rc == -ENOENT) {
			qlt_port_logo_t logo;
			sid_to_portid(s_id, &logo.id);
			logo.cmd_count = 1;
			qlt_send_first_logo(vha, &logo);
		}

6025 6026 6027 6028
		return NULL;
	}

	fcport = qlt_get_port_database(vha, loop_id);
6029 6030
	if (!fcport) {
		mutex_unlock(&vha->vha_tgt.tgt_mutex);
6031
		return NULL;
6032
	}
6033 6034

	if (global_resets !=
6035
	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6036 6037 6038 6039
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
		    "qla_target(%d): global reset during session discovery "
		    "(counter was %d, new %d), retrying", vha->vp_idx,
		    global_resets,
6040 6041
		    atomic_read(&vha->vha_tgt.
			qla_tgt->tgt_global_resets_count));
6042 6043 6044 6045 6046
		goto retry;
	}

	sess = qlt_create_sess(vha, fcport, true);

6047 6048
	mutex_unlock(&vha->vha_tgt.tgt_mutex);

6049 6050 6051 6052 6053 6054 6055 6056
	return sess;
}

static void qlt_abort_work(struct qla_tgt *tgt,
	struct qla_tgt_sess_work_param *prm)
{
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
6057
	struct fc_port *sess = NULL;
6058
	unsigned long flags = 0, flags2 = 0;
6059 6060 6061 6062
	uint32_t be_s_id;
	uint8_t s_id[3];
	int rc;

6063
	spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6064 6065

	if (tgt->tgt_stop)
6066
		goto out_term2;
6067 6068 6069 6070 6071 6072 6073 6074

	s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
	s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
	s_id[2] = prm->abts.fcp_hdr_le.s_id[0];

	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
	    (unsigned char *)&be_s_id);
	if (!sess) {
6075
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6076 6077 6078 6079

		sess = qlt_make_local_sess(vha, s_id);
		/* sess has got an extra creation ref */

6080
		spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6081
		if (!sess)
6082
			goto out_term2;
6083
	} else {
6084
		if (sess->deleted) {
6085
			sess = NULL;
6086
			goto out_term2;
6087 6088
		}

6089
		if (!kref_get_unless_zero(&sess->sess_kref)) {
6090
			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6091 6092 6093 6094 6095
			    "%s: kref_get fail %8phC \n",
			     __func__, sess->port_name);
			sess = NULL;
			goto out_term2;
		}
6096 6097 6098
	}

	rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6099 6100 6101
	ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);

6102 6103 6104 6105
	if (rc != 0)
		goto out_term;
	return;

6106
out_term2:
6107 6108 6109
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6110

6111
out_term:
6112
	spin_lock_irqsave(&ha->hardware_lock, flags);
6113 6114
	qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
	    FCP_TMF_REJECTED, false);
6115
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6116 6117 6118 6119 6120 6121 6122 6123
}

static void qlt_tmr_work(struct qla_tgt *tgt,
	struct qla_tgt_sess_work_param *prm)
{
	struct atio_from_isp *a = &prm->tm_iocb2;
	struct scsi_qla_host *vha = tgt->vha;
	struct qla_hw_data *ha = vha->hw;
6124
	struct fc_port *sess = NULL;
6125 6126 6127
	unsigned long flags;
	uint8_t *s_id = NULL; /* to hide compiler warnings */
	int rc;
6128
	u64 unpacked_lun;
6129
	int fn;
6130 6131
	void *iocb;

6132
	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6133 6134

	if (tgt->tgt_stop)
6135
		goto out_term2;
6136 6137 6138 6139

	s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
	if (!sess) {
6140
		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6141 6142 6143 6144

		sess = qlt_make_local_sess(vha, s_id);
		/* sess has got an extra creation ref */

6145
		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6146
		if (!sess)
6147
			goto out_term2;
6148
	} else {
6149
		if (sess->deleted) {
6150
			sess = NULL;
6151
			goto out_term2;
6152 6153
		}

6154
		if (!kref_get_unless_zero(&sess->sess_kref)) {
6155
			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6156 6157 6158
			    "%s: kref_get fail %8phC\n",
			     __func__, sess->port_name);
			sess = NULL;
6159
			goto out_term2;
6160
		}
6161 6162 6163 6164
	}

	iocb = a;
	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6165 6166
	unpacked_lun =
	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6167 6168

	rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6169
	ha->tgt.tgt_ops->put_sess(sess);
6170
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6171 6172 6173

	if (rc != 0)
		goto out_term;
6174 6175
	return;

6176 6177 6178 6179
out_term2:
	if (sess)
		ha->tgt.tgt_ops->put_sess(sess);
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6180
out_term:
6181
	qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228
}

static void qlt_sess_work_fn(struct work_struct *work)
{
	struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
	struct scsi_qla_host *vha = tgt->vha;
	unsigned long flags;

	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);

	spin_lock_irqsave(&tgt->sess_work_lock, flags);
	while (!list_empty(&tgt->sess_works_list)) {
		struct qla_tgt_sess_work_param *prm = list_entry(
		    tgt->sess_works_list.next, typeof(*prm),
		    sess_works_list_entry);

		/*
		 * This work can be scheduled on several CPUs at time, so we
		 * must delete the entry to eliminate double processing
		 */
		list_del(&prm->sess_works_list_entry);

		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);

		switch (prm->type) {
		case QLA_TGT_SESS_WORK_ABORT:
			qlt_abort_work(tgt, prm);
			break;
		case QLA_TGT_SESS_WORK_TM:
			qlt_tmr_work(tgt, prm);
			break;
		default:
			BUG_ON(1);
			break;
		}

		spin_lock_irqsave(&tgt->sess_work_lock, flags);

		kfree(prm);
	}
	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
}

/* Must be called under tgt_host_action_mutex */
int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
{
	struct qla_tgt *tgt;
6229 6230
	int rc, i;
	struct qla_qpair_hint *h;
6231 6232 6233 6234

	if (!QLA_TGT_MODE_ENABLED())
		return 0;

6235 6236 6237 6238 6239 6240
	if (!IS_TGT_MODE_CAPABLE(ha)) {
		ql_log(ql_log_warn, base_vha, 0xe070,
		    "This adapter does not support target mode.\n");
		return 0;
	}

6241
	ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6242
	    "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6243

6244
	BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6245 6246 6247 6248 6249 6250 6251 6252

	tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
	if (!tgt) {
		ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
		    "Unable to allocate struct qla_tgt\n");
		return -ENOMEM;
	}

K
Kees Cook 已提交
6253 6254 6255
	tgt->qphints = kcalloc(ha->max_qpairs + 1,
			       sizeof(struct qla_qpair_hint),
			       GFP_KERNEL);
6256 6257 6258 6259 6260 6261 6262
	if (!tgt->qphints) {
		kfree(tgt);
		ql_log(ql_log_warn, base_vha, 0x0197,
		    "Unable to allocate qpair hints.\n");
		return -ENOMEM;
	}

6263 6264 6265
	if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
		base_vha->host->hostt->supported_mode |= MODE_TARGET;

6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292 6293 6294
	rc = btree_init64(&tgt->lun_qpair_map);
	if (rc) {
		kfree(tgt->qphints);
		kfree(tgt);
		ql_log(ql_log_info, base_vha, 0x0198,
			"Unable to initialize lun_qpair_map btree\n");
		return -EIO;
	}
	h = &tgt->qphints[0];
	h->qpair = ha->base_qpair;
	INIT_LIST_HEAD(&h->hint_elem);
	h->cpuid = ha->base_qpair->cpuid;
	list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);

	for (i = 0; i < ha->max_qpairs; i++) {
		unsigned long flags;

		struct qla_qpair *qpair = ha->queue_pair_map[i];
		h = &tgt->qphints[i + 1];
		INIT_LIST_HEAD(&h->hint_elem);
		if (qpair) {
			h->qpair = qpair;
			spin_lock_irqsave(qpair->qp_lock_ptr, flags);
			list_add_tail(&h->hint_elem, &qpair->hints_list);
			spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
			h->cpuid = qpair->cpuid;
		}
	}

6295 6296 6297 6298 6299 6300 6301 6302 6303
	tgt->ha = ha;
	tgt->vha = base_vha;
	init_waitqueue_head(&tgt->waitQ);
	INIT_LIST_HEAD(&tgt->del_sess_list);
	spin_lock_init(&tgt->sess_work_lock);
	INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
	INIT_LIST_HEAD(&tgt->sess_works_list);
	atomic_set(&tgt->tgt_global_resets_count, 0);

6304
	base_vha->vha_tgt.qla_tgt = tgt;
6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315

	ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
		"qla_target(%d): using 64 Bit PCI addressing",
		base_vha->vp_idx);
	/* 3 is reserved */
	tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);

	mutex_lock(&qla_tgt_mutex);
	list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
	mutex_unlock(&qla_tgt_mutex);

6316 6317 6318
	if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
		ha->tgt.tgt_ops->add_target(base_vha);

6319 6320 6321 6322 6323 6324
	return 0;
}

/* Must be called under tgt_host_action_mutex */
int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
{
6325
	if (!vha->vha_tgt.qla_tgt)
6326 6327
		return 0;

6328 6329 6330 6331
	if (vha->fc_vport) {
		qlt_release(vha->vha_tgt.qla_tgt);
		return 0;
	}
6332 6333 6334 6335

	/* free left over qfull cmds */
	qlt_init_term_exchange(vha);

6336 6337
	ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
	    vha->host_no, ha);
6338
	qlt_release(vha->vha_tgt.qla_tgt);
6339 6340 6341 6342

	return 0;
}

6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353
void qlt_remove_target_resources(struct qla_hw_data *ha)
{
	struct scsi_qla_host *node;
	u32 key = 0;

	btree_for_each_safe32(&ha->tgt.host_map, key, node)
		btree_remove32(&ha->tgt.host_map, key);

	btree_destroy32(&ha->tgt.host_map);
}

6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378
static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
	unsigned char *b)
{
	int i;

	pr_debug("qla2xxx HW vha->node_name: ");
	for (i = 0; i < WWN_SIZE; i++)
		pr_debug("%02x ", vha->node_name[i]);
	pr_debug("\n");
	pr_debug("qla2xxx HW vha->port_name: ");
	for (i = 0; i < WWN_SIZE; i++)
		pr_debug("%02x ", vha->port_name[i]);
	pr_debug("\n");

	pr_debug("qla2xxx passed configfs WWPN: ");
	put_unaligned_be64(wwpn, b);
	for (i = 0; i < WWN_SIZE; i++)
		pr_debug("%02x ", b[i]);
	pr_debug("\n");
}

/**
 * qla_tgt_lport_register - register lport with external module
 *
 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6379 6380 6381 6382
 * @phys_wwpn:
 * @npiv_wwpn:
 * @npiv_wwnn:
 * @callback:  lport initialization callback for tcm_qla2xxx code
6383
 */
6384 6385 6386
int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
		       u64 npiv_wwpn, u64 npiv_wwnn,
		       int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408
{
	struct qla_tgt *tgt;
	struct scsi_qla_host *vha;
	struct qla_hw_data *ha;
	struct Scsi_Host *host;
	unsigned long flags;
	int rc;
	u8 b[WWN_SIZE];

	mutex_lock(&qla_tgt_mutex);
	list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
		vha = tgt->vha;
		ha = vha->hw;

		host = vha->host;
		if (!host)
			continue;

		if (!(host->hostt->supported_mode & MODE_TARGET))
			continue;

		spin_lock_irqsave(&ha->hardware_lock, flags);
6409
		if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6410 6411 6412 6413 6414
			pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
			    host->host_no);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			continue;
		}
6415 6416 6417 6418 6419 6420
		if (tgt->tgt_stop) {
			pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
				 host->host_no);
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			continue;
		}
6421 6422 6423 6424 6425 6426 6427 6428
		spin_unlock_irqrestore(&ha->hardware_lock, flags);

		if (!scsi_host_get(host)) {
			ql_dbg(ql_dbg_tgt, vha, 0xe068,
			    "Unable to scsi_host_get() for"
			    " qla2xxx scsi_host\n");
			continue;
		}
6429
		qlt_lport_dump(vha, phys_wwpn, b);
6430 6431 6432 6433 6434

		if (memcmp(vha->port_name, b, WWN_SIZE)) {
			scsi_host_put(host);
			continue;
		}
6435 6436 6437 6438
		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
		if (rc != 0)
			scsi_host_put(host);

6439
		mutex_unlock(&qla_tgt_mutex);
6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459
		return rc;
	}
	mutex_unlock(&qla_tgt_mutex);

	return -ENODEV;
}
EXPORT_SYMBOL(qlt_lport_register);

/**
 * qla_tgt_lport_deregister - Degister lport
 *
 * @vha:  Registered scsi_qla_host pointer
 */
void qlt_lport_deregister(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
	struct Scsi_Host *sh = vha->host;
	/*
	 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
	 */
6460
	vha->vha_tgt.target_lport_ptr = NULL;
6461 6462 6463 6464 6465 6466 6467 6468 6469
	ha->tgt.tgt_ops = NULL;
	/*
	 * Release the Scsi_Host reference for the underlying qla2xxx host
	 */
	scsi_host_put(sh);
}
EXPORT_SYMBOL(qlt_lport_deregister);

/* Must be called under HW lock */
6470
static void qlt_set_mode(struct scsi_qla_host *vha)
6471 6472 6473 6474 6475 6476 6477
{
	switch (ql2x_ini_mode) {
	case QLA2XXX_INI_MODE_DISABLED:
	case QLA2XXX_INI_MODE_EXCLUSIVE:
		vha->host->active_mode = MODE_TARGET;
		break;
	case QLA2XXX_INI_MODE_ENABLED:
6478 6479 6480 6481
		vha->host->active_mode = MODE_UNKNOWN;
		break;
	case QLA2XXX_INI_MODE_DUAL:
		vha->host->active_mode = MODE_DUAL;
6482 6483 6484 6485 6486 6487 6488
		break;
	default:
		break;
	}
}

/* Must be called under HW lock */
6489
static void qlt_clear_mode(struct scsi_qla_host *vha)
6490 6491 6492 6493 6494 6495 6496 6497 6498
{
	switch (ql2x_ini_mode) {
	case QLA2XXX_INI_MODE_DISABLED:
		vha->host->active_mode = MODE_UNKNOWN;
		break;
	case QLA2XXX_INI_MODE_EXCLUSIVE:
		vha->host->active_mode = MODE_INITIATOR;
		break;
	case QLA2XXX_INI_MODE_ENABLED:
6499 6500
	case QLA2XXX_INI_MODE_DUAL:
		vha->host->active_mode = MODE_INITIATOR;
6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515
		break;
	default:
		break;
	}
}

/*
 * qla_tgt_enable_vha - NO LOCK HELD
 *
 * host_reset, bring up w/ Target Mode Enabled
 */
void
qlt_enable_vha(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
6516
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6517
	unsigned long flags;
6518
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532

	if (!tgt) {
		ql_dbg(ql_dbg_tgt, vha, 0xe069,
		    "Unable to locate qla_tgt pointer from"
		    " struct qla_hw_data\n");
		dump_stack();
		return;
	}

	spin_lock_irqsave(&ha->hardware_lock, flags);
	tgt->tgt_stopped = 0;
	qlt_set_mode(vha);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

6533 6534 6535 6536 6537 6538 6539 6540
	if (vha->vp_idx) {
		qla24xx_disable_vp(vha);
		qla24xx_enable_vp(vha);
	} else {
		set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
		qla2xxx_wake_dpc(base_vha);
		qla2x00_wait_for_hba_online(base_vha);
	}
6541 6542 6543 6544 6545 6546 6547 6548
}
EXPORT_SYMBOL(qlt_enable_vha);

/*
 * qla_tgt_disable_vha - NO LOCK HELD
 *
 * Disable Target Mode and reset the adapter
 */
6549
static void qlt_disable_vha(struct scsi_qla_host *vha)
6550 6551
{
	struct qla_hw_data *ha = vha->hw;
6552
	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579
	unsigned long flags;

	if (!tgt) {
		ql_dbg(ql_dbg_tgt, vha, 0xe06a,
		    "Unable to locate qla_tgt pointer from"
		    " struct qla_hw_data\n");
		dump_stack();
		return;
	}

	spin_lock_irqsave(&ha->hardware_lock, flags);
	qlt_clear_mode(vha);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
	qla2xxx_wake_dpc(vha);
	qla2x00_wait_for_hba_online(vha);
}

/*
 * Called from qla_init.c:qla24xx_vport_create() contex to setup
 * the target mode specific struct scsi_qla_host and struct qla_hw_data
 * members.
 */
void
qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
{
6580 6581 6582 6583
	vha->vha_tgt.qla_tgt = NULL;

	mutex_init(&vha->vha_tgt.tgt_mutex);
	mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6584 6585 6586 6587 6588 6589 6590 6591 6592 6593

	qlt_clear_mode(vha);

	/*
	 * NOTE: Currently the value is kept the same for <24xx and
	 * >=24xx ISPs. If it is necessary to change it,
	 * the check should be added for specific ISPs,
	 * assigning the value appropriately.
	 */
	ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6594 6595

	qlt_add_target(ha, vha);
6596 6597
}

6598 6599
u8
qlt_rff_id(struct scsi_qla_host *vha)
6600
{
6601
	u8 fc4_feature = 0;
6602 6603 6604 6605
	/*
	 * FC-4 Feature bit 0 indicates target functionality to the name server.
	 */
	if (qla_tgt_mode_enabled(vha)) {
6606
		fc4_feature = BIT_0;
6607
	} else if (qla_ini_mode_enabled(vha)) {
6608
		fc4_feature = BIT_1;
6609
	} else if (qla_dual_mode_enabled(vha))
6610 6611 6612
		fc4_feature = BIT_0 | BIT_1;

	return fc4_feature;
6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630
}

/*
 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
 * @ha: HA context
 *
 * Beginning of ATIO ring has initialization control block already built
 * by nvram config routine.
 *
 * Returns 0 on success.
 */
void
qlt_init_atio_q_entries(struct scsi_qla_host *vha)
{
	struct qla_hw_data *ha = vha->hw;
	uint16_t cnt;
	struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;

6631
	if (qla_ini_mode_enabled(vha))
6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645
		return;

	for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
		pkt->u.raw.signature = ATIO_PROCESSED;
		pkt++;
	}

}

/*
 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
 * @ha: SCSI driver HA context
 */
void
6646
qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6647 6648 6649 6650 6651
{
	struct qla_hw_data *ha = vha->hw;
	struct atio_from_isp *pkt;
	int cnt, i;

6652
	if (!ha->flags.fw_started)
6653 6654
		return;

6655 6656
	while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
	    fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6657 6658 6659
		pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
		cnt = pkt->u.raw.entry_count;

6660 6661 6662 6663 6664 6665
		if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
			/*
			 * This packet is corrupted. The header + payload
			 * can not be trusted. There is no point in passing
			 * it further up.
			 */
6666
			ql_log(ql_log_warn, vha, 0xd03c,
6667 6668 6669 6670 6671 6672
			    "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
			    pkt->u.isp24.fcp_hdr.s_id,
			    be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
			    le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);

			adjust_corrupted_atio(pkt);
6673 6674
			qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
			    ha_locked, 0);
6675 6676 6677 6678
		} else {
			qlt_24xx_atio_pkt_all_vps(vha,
			    (struct atio_from_isp *)pkt, ha_locked);
		}
6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694

		for (i = 0; i < cnt; i++) {
			ha->tgt.atio_ring_index++;
			if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
				ha->tgt.atio_ring_index = 0;
				ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
			} else
				ha->tgt.atio_ring_ptr++;

			pkt->u.raw.signature = ATIO_PROCESSED;
			pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
		}
		wmb();
	}

	/* Adjust ring index */
6695
	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6696 6697 6698
}

void
6699
qlt_24xx_config_rings(struct scsi_qla_host *vha)
6700 6701
{
	struct qla_hw_data *ha = vha->hw;
6702 6703 6704
	struct qla_msix_entry *msix = &ha->msix_entries[2];
	struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;

6705 6706
	if (!QLA_TGT_MODE_ENABLED())
		return;
6707

6708 6709 6710 6711
	WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
	RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));

6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733
	if (ha->flags.msix_enabled) {
		if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
			if (IS_QLA2071(ha)) {
				/* 4 ports Baker: Enable Interrupt Handshake */
				icb->msix_atio = 0;
				icb->firmware_options_2 |= BIT_26;
			} else {
				icb->msix_atio = cpu_to_le16(msix->entry);
				icb->firmware_options_2 &= ~BIT_26;
			}
			ql_dbg(ql_dbg_init, vha, 0xf072,
			    "Registering ICB vector 0x%x for atio que.\n",
			    msix->entry);
		}
	} else {
		/* INTx|MSI */
		if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
			icb->msix_atio = 0;
			icb->firmware_options_2 |= BIT_26;
			ql_dbg(ql_dbg_init, vha, 0xf072,
			    "%s: Use INTx for ATIOQ.\n", __func__);
		}
6734 6735 6736 6737 6738 6739 6740
	}
}

void
qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
{
	struct qla_hw_data *ha = vha->hw;
6741
	u32 tmp;
6742 6743 6744

	if (!QLA_TGT_MODE_ENABLED())
		return;
6745

6746
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758
		if (!ha->tgt.saved_set) {
			/* We save only once */
			ha->tgt.saved_exchange_count = nv->exchange_count;
			ha->tgt.saved_firmware_options_1 =
			    nv->firmware_options_1;
			ha->tgt.saved_firmware_options_2 =
			    nv->firmware_options_2;
			ha->tgt.saved_firmware_options_3 =
			    nv->firmware_options_3;
			ha->tgt.saved_set = 1;
		}

6759
		if (qla_tgt_mode_enabled(vha))
6760
			nv->exchange_count = cpu_to_le16(0xFFFF);
6761 6762
		else			/* dual */
			nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6763 6764

		/* Enable target mode */
6765
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6766 6767

		/* Disable ini mode, if requested */
6768
		if (qla_tgt_mode_enabled(vha))
6769
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6770 6771

		/* Disable Full Login after LIP */
6772
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6773
		/* Enable initial LIP */
6774
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6775 6776 6777 6778 6779 6780 6781
		if (ql2xtgt_tape_enable)
			/* Enable FC Tape support */
			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
		else
			/* Disable FC Tape support */
			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);

6782
		/* Disable Full Login after LIP */
6783
		nv->host_p &= cpu_to_le32(~BIT_10);
6784 6785 6786 6787 6788 6789 6790

		/*
		 * clear BIT 15 explicitly as we have seen at least
		 * a couple of instances where this was set and this
		 * was causing the firmware to not be initialized.
		 */
		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6791
		/* Enable target PRLI control */
6792
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6793 6794 6795 6796 6797 6798 6799 6800

		if (IS_QLA25XX(ha)) {
			/* Change Loop-prefer to Pt-Pt */
			tmp = ~(BIT_4|BIT_5|BIT_6);
			nv->firmware_options_2 &= cpu_to_le32(tmp);
			tmp = P2P << 4;
			nv->firmware_options_2 |= cpu_to_le32(tmp);
		}
6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813
	} else {
		if (ha->tgt.saved_set) {
			nv->exchange_count = ha->tgt.saved_exchange_count;
			nv->firmware_options_1 =
			    ha->tgt.saved_firmware_options_1;
			nv->firmware_options_2 =
			    ha->tgt.saved_firmware_options_2;
			nv->firmware_options_3 =
			    ha->tgt.saved_firmware_options_3;
		}
		return;
	}

6814
	if (ha->base_qpair->enable_class_2) {
6815 6816 6817 6818
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) =
				FC_COS_CLASS2 | FC_COS_CLASS3;

6819
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6820 6821 6822 6823
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6824
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6825 6826 6827 6828 6829 6830 6831 6832 6833
	}
}

void
qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
	struct init_cb_24xx *icb)
{
	struct qla_hw_data *ha = vha->hw;

Q
Quinn Tran 已提交
6834 6835 6836
	if (!QLA_TGT_MODE_ENABLED())
		return;

6837 6838
	if (ha->tgt.node_name_set) {
		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6839
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6840
	}
Q
Quinn Tran 已提交
6841 6842 6843 6844 6845 6846 6847 6848

	/* disable ZIO at start time. */
	if (!vha->flags.init_done) {
		uint32_t tmp;
		tmp = le32_to_cpu(icb->firmware_options_2);
		tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
		icb->firmware_options_2 = cpu_to_le32(tmp);
	}
6849 6850
}

6851 6852 6853 6854
void
qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
{
	struct qla_hw_data *ha = vha->hw;
6855
	u32 tmp;
6856 6857 6858 6859

	if (!QLA_TGT_MODE_ENABLED())
		return;

6860
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872
		if (!ha->tgt.saved_set) {
			/* We save only once */
			ha->tgt.saved_exchange_count = nv->exchange_count;
			ha->tgt.saved_firmware_options_1 =
			    nv->firmware_options_1;
			ha->tgt.saved_firmware_options_2 =
			    nv->firmware_options_2;
			ha->tgt.saved_firmware_options_3 =
			    nv->firmware_options_3;
			ha->tgt.saved_set = 1;
		}

6873
		if (qla_tgt_mode_enabled(vha))
6874
			nv->exchange_count = cpu_to_le16(0xFFFF);
6875 6876
		else			/* dual */
			nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6877 6878

		/* Enable target mode */
6879
		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6880 6881

		/* Disable ini mode, if requested */
6882
		if (qla_tgt_mode_enabled(vha))
6883
			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6884
		/* Disable Full Login after LIP */
6885
		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6886
		/* Enable initial LIP */
6887
		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6888 6889 6890 6891 6892 6893 6894
		/*
		 * clear BIT 15 explicitly as we have seen at
		 * least a couple of instances where this was set
		 * and this was causing the firmware to not be
		 * initialized.
		 */
		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6895 6896 6897 6898 6899 6900 6901
		if (ql2xtgt_tape_enable)
			/* Enable FC tape support */
			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
		else
			/* Disable FC tape support */
			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);

6902
		/* Disable Full Login after LIP */
6903
		nv->host_p &= cpu_to_le32(~BIT_10);
6904
		/* Enable target PRLI control */
6905
		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6906 6907 6908 6909 6910 6911

		/* Change Loop-prefer to Pt-Pt */
		tmp = ~(BIT_4|BIT_5|BIT_6);
		nv->firmware_options_2 &= cpu_to_le32(tmp);
		tmp = P2P << 4;
		nv->firmware_options_2 |= cpu_to_le32(tmp);
6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924
	} else {
		if (ha->tgt.saved_set) {
			nv->exchange_count = ha->tgt.saved_exchange_count;
			nv->firmware_options_1 =
			    ha->tgt.saved_firmware_options_1;
			nv->firmware_options_2 =
			    ha->tgt.saved_firmware_options_2;
			nv->firmware_options_3 =
			    ha->tgt.saved_firmware_options_3;
		}
		return;
	}

6925
	if (ha->base_qpair->enable_class_2) {
6926 6927 6928 6929
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) =
				FC_COS_CLASS2 | FC_COS_CLASS3;

6930
		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6931 6932 6933 6934
	} else {
		if (vha->flags.init_done)
			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;

6935
		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6936 6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947 6948 6949
	}
}

void
qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
	struct init_cb_81xx *icb)
{
	struct qla_hw_data *ha = vha->hw;

	if (!QLA_TGT_MODE_ENABLED())
		return;

	if (ha->tgt.node_name_set) {
		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6950
		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6951
	}
Q
Quinn Tran 已提交
6952 6953 6954 6955 6956 6957 6958 6959 6960

	/* disable ZIO at start time. */
	if (!vha->flags.init_done) {
		uint32_t tmp;
		tmp = le32_to_cpu(icb->firmware_options_2);
		tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
		icb->firmware_options_2 = cpu_to_le32(tmp);
	}

6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971
}

void
qlt_83xx_iospace_config(struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

	ha->msix_count += 1; /* For ATIO Q */
}

6972 6973 6974 6975 6976

void
qlt_modify_vp_config(struct scsi_qla_host *vha,
	struct vp_config_entry_24xx *vpmod)
{
6977 6978
	/* enable target mode.  Bit5 = 1 => disable */
	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6979
		vpmod->options_idx1 &= ~BIT_5;
6980

6981
	/* Disable ini mode, if requested.  bit4 = 1 => disable */
6982
	if (qla_tgt_mode_enabled(vha))
6983 6984 6985 6986 6987 6988
		vpmod->options_idx1 &= ~BIT_4;
}

void
qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
{
6989 6990
	int rc;

6991 6992 6993
	if (!QLA_TGT_MODE_ENABLED())
		return;

6994
	if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6995 6996 6997 6998 6999 7000 7001
		ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
		ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
	} else {
		ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
		ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
	}

7002 7003
	mutex_init(&base_vha->vha_tgt.tgt_mutex);
	mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7004 7005 7006 7007 7008

	INIT_LIST_HEAD(&base_vha->unknown_atio_list);
	INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
	    qlt_unknown_atio_work_fn);

7009
	qlt_clear_mode(base_vha);
7010 7011 7012

	rc = btree_init32(&ha->tgt.host_map);
	if (rc)
7013
		ql_log(ql_log_info, base_vha, 0xd03d,
7014 7015 7016
		    "Unable to initialize ha->host_map btree\n");

	qlt_update_vp_map(base_vha, SET_VP_IDX);
7017 7018
}

7019 7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030
irqreturn_t
qla83xx_msix_atio_q(int irq, void *dev_id)
{
	struct rsp_que *rsp;
	scsi_qla_host_t	*vha;
	struct qla_hw_data *ha;
	unsigned long flags;

	rsp = (struct rsp_que *) dev_id;
	ha = rsp->hw;
	vha = pci_get_drvdata(ha->pdev);

7031
	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7032

7033
	qlt_24xx_process_atio_queue(vha, 0);
7034

7035
	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7036 7037 7038 7039

	return IRQ_HANDLED;
}

7040 7041 7042 7043 7044 7045 7046 7047 7048
static void
qlt_handle_abts_recv_work(struct work_struct *work)
{
	struct qla_tgt_sess_op *op = container_of(work,
		struct qla_tgt_sess_op, work);
	scsi_qla_host_t *vha = op->vha;
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;

7049 7050
	if (qla2x00_reset_active(vha) ||
	    (op->chip_reset != ha->base_qpair->chip_reset))
7051 7052 7053 7054 7055 7056 7057
		return;

	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
	qlt_24xx_process_atio_queue(vha, 0);
	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);

	spin_lock_irqsave(&ha->hardware_lock, flags);
7058
	qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7059
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
7060 7061

	kfree(op);
7062 7063 7064
}

void
7065 7066
qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
    response_t *pkt)
7067 7068 7069 7070 7071 7072 7073 7074 7075
{
	struct qla_tgt_sess_op *op;

	op = kzalloc(sizeof(*op), GFP_ATOMIC);

	if (!op) {
		/* do not reach for ATIO queue here.  This is best effort err
		 * recovery at this point.
		 */
7076
		qlt_response_pkt_all_vps(vha, rsp, pkt);
7077 7078 7079 7080 7081
		return;
	}

	memcpy(&op->atio, pkt, sizeof(*pkt));
	op->vha = vha;
7082
	op->chip_reset = vha->hw->base_qpair->chip_reset;
7083
	op->rsp = rsp;
7084 7085 7086 7087 7088
	INIT_WORK(&op->work, qlt_handle_abts_recv_work);
	queue_work(qla_tgt_wq, &op->work);
	return;
}

7089 7090 7091 7092 7093 7094
int
qlt_mem_alloc(struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return 0;

K
Kees Cook 已提交
7095 7096 7097
	ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
				     sizeof(struct qla_tgt_vp_map),
				     GFP_KERNEL);
7098 7099 7100 7101 7102 7103 7104 7105 7106 7107 7108 7109 7110 7111 7112 7113 7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128
	if (!ha->tgt.tgt_vp_map)
		return -ENOMEM;

	ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
	    (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
	    &ha->tgt.atio_dma, GFP_KERNEL);
	if (!ha->tgt.atio_ring) {
		kfree(ha->tgt.tgt_vp_map);
		return -ENOMEM;
	}
	return 0;
}

void
qlt_mem_free(struct qla_hw_data *ha)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

	if (ha->tgt.atio_ring) {
		dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
		    sizeof(struct atio_from_isp), ha->tgt.atio_ring,
		    ha->tgt.atio_dma);
	}
	kfree(ha->tgt.tgt_vp_map);
}

/* vport_slock to be held by the caller */
void
qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
{
7129 7130 7131 7132
	void *slot;
	u32 key;
	int rc;

7133 7134 7135
	if (!QLA_TGT_MODE_ENABLED())
		return;

7136 7137
	key = vha->d_id.b24;

7138 7139 7140 7141 7142
	switch (cmd) {
	case SET_VP_IDX:
		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
		break;
	case SET_AL_PA:
7143 7144
		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
		if (!slot) {
7145
			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7146 7147 7148 7149
			    "Save vha in host_map %p %06x\n", vha, key);
			rc = btree_insert32(&vha->hw->tgt.host_map,
				key, vha, GFP_ATOMIC);
			if (rc)
7150
				ql_log(ql_log_info, vha, 0xd03e,
7151 7152 7153 7154
				    "Unable to insert s_id into host_map: %06x\n",
				    key);
			return;
		}
7155 7156
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
		    "replace existing vha in host_map %p %06x\n", vha, key);
7157
		btree_update32(&vha->hw->tgt.host_map, key, vha);
7158 7159 7160 7161 7162
		break;
	case RESET_VP_IDX:
		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
		break;
	case RESET_AL_PA:
7163
		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7164 7165 7166 7167 7168
		   "clear vha in host_map %p %06x\n", vha, key);
		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
		if (slot)
			btree_remove32(&vha->hw->tgt.host_map, key);
		vha->d_id.b24 = 0;
7169 7170 7171 7172
		break;
	}
}

7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185
void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
{

	if (!vha->d_id.b24) {
		vha->d_id = id;
		qlt_update_vp_map(vha, SET_AL_PA);
	} else if (vha->d_id.b24 != id.b24) {
		qlt_update_vp_map(vha, RESET_AL_PA);
		vha->d_id = id;
		qlt_update_vp_map(vha, SET_AL_PA);
	}
}

7186 7187 7188 7189 7190 7191 7192 7193
static int __init qlt_parse_ini_mode(void)
{
	if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7194 7195
	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
		ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7196 7197 7198 7199 7200 7201 7202 7203 7204 7205 7206 7207 7208 7209 7210 7211 7212 7213 7214 7215 7216 7217 7218
	else
		return false;

	return true;
}

int __init qlt_init(void)
{
	int ret;

	if (!qlt_parse_ini_mode()) {
		ql_log(ql_log_fatal, NULL, 0xe06b,
		    "qlt_parse_ini_mode() failed\n");
		return -EINVAL;
	}

	if (!QLA_TGT_MODE_ENABLED())
		return 0;

	qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
	    sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
	    qla_tgt_mgmt_cmd), 0, NULL);
	if (!qla_tgt_mgmt_cmd_cachep) {
7219
		ql_log(ql_log_fatal, NULL, 0xd04b,
7220
		    "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7221
		return -ENOMEM;
7222 7223
	}

7224
	qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7225 7226
	    sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
	    0, NULL);
7227 7228 7229 7230 7231 7232 7233 7234

	if (!qla_tgt_plogi_cachep) {
		ql_log(ql_log_fatal, NULL, 0xe06d,
		    "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
		ret = -ENOMEM;
		goto out_mgmt_cmd_cachep;
	}

7235 7236 7237 7238 7239 7240
	qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
	    mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
	if (!qla_tgt_mgmt_cmd_mempool) {
		ql_log(ql_log_fatal, NULL, 0xe06e,
		    "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
		ret = -ENOMEM;
7241
		goto out_plogi_cachep;
7242 7243 7244 7245 7246 7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257
	}

	qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
	if (!qla_tgt_wq) {
		ql_log(ql_log_fatal, NULL, 0xe06f,
		    "alloc_workqueue for qla_tgt_wq failed\n");
		ret = -ENOMEM;
		goto out_cmd_mempool;
	}
	/*
	 * Return 1 to signal that initiator-mode is being disabled
	 */
	return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;

out_cmd_mempool:
	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7258 7259
out_plogi_cachep:
	kmem_cache_destroy(qla_tgt_plogi_cachep);
7260 7261 7262 7263 7264 7265 7266 7267 7268 7269 7270 7271
out_mgmt_cmd_cachep:
	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
	return ret;
}

void qlt_exit(void)
{
	if (!QLA_TGT_MODE_ENABLED())
		return;

	destroy_workqueue(qla_tgt_wq);
	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7272
	kmem_cache_destroy(qla_tgt_plogi_cachep);
7273 7274
	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
}