1 /*
2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
3  *
4  *  based on qla2x00t.c code:
5  *
6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
10  *
11  *  Forward port and refactoring to modern qla2xxx and target/configfs
12  *
13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
14  *
15  *  This program is free software; you can redistribute it and/or
16  *  modify it under the terms of the GNU General Public License
17  *  as published by the Free Software Foundation, version 2
18  *  of the License.
19  *
20  *  This program is distributed in the hope that it will be useful,
21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23  *  GNU General Public License for more details.
24  */
25 
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/blkdev.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/delay.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <asm/unaligned.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_tcq.h>
39 #include <target/target_core_base.h>
40 #include <target/target_core_fabric.h>
41 
42 #include "qla_def.h"
43 #include "qla_target.h"
44 
45 static int ql2xtgt_tape_enable;
46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
48 		"Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
49 
50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
51 module_param(qlini_mode, charp, S_IRUGO);
52 MODULE_PARM_DESC(qlini_mode,
53 	"Determines when initiator mode will be enabled. Possible values: "
54 	"\"exclusive\" - initiator mode will be enabled on load, "
55 	"disabled on enabling target mode and then on disabling target mode "
56 	"enabled back; "
57 	"\"disabled\" - initiator mode will never be enabled; "
58 	"\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
59 	"when ready "
60 	"\"enabled\" (default) - initiator mode will always stay enabled.");
61 
62 static int ql_dm_tgt_ex_pct = 0;
63 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
64 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
65 	"For Dual Mode (qlini_mode=dual), this parameter determines "
66 	"the percentage of exchanges/cmds FW will allocate resources "
67 	"for Target mode.");
68 
69 int ql2xuctrlirq = 1;
70 module_param(ql2xuctrlirq, int, 0644);
71 MODULE_PARM_DESC(ql2xuctrlirq,
72     "User to control IRQ placement via smp_affinity."
73     "Valid with qlini_mode=disabled."
74     "1(default): enable");
75 
76 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
77 
78 static int qla_sam_status = SAM_STAT_BUSY;
79 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
80 
81 /*
82  * From scsi/fc/fc_fcp.h
83  */
84 enum fcp_resp_rsp_codes {
85 	FCP_TMF_CMPL = 0,
86 	FCP_DATA_LEN_INVALID = 1,
87 	FCP_CMND_FIELDS_INVALID = 2,
88 	FCP_DATA_PARAM_MISMATCH = 3,
89 	FCP_TMF_REJECTED = 4,
90 	FCP_TMF_FAILED = 5,
91 	FCP_TMF_INVALID_LUN = 9,
92 };
93 
94 /*
95  * fc_pri_ta from scsi/fc/fc_fcp.h
96  */
97 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
98 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
99 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
100 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
101 #define FCP_PTA_MASK        7   /* mask for task attribute field */
102 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
103 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
104 
105 /*
106  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
107  * must be called under HW lock and could unlock/lock it inside.
108  * It isn't an issue, since in the current implementation on the time when
109  * those functions are called:
110  *
111  *   - Either context is IRQ and only IRQ handler can modify HW data,
112  *     including rings related fields,
113  *
114  *   - Or access to target mode variables from struct qla_tgt doesn't
115  *     cross those functions boundaries, except tgt_stop, which
116  *     additionally protected by irq_cmd_count.
117  */
118 /* Predefs for callbacks handed to qla2xxx LLD */
119 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
120 	struct atio_from_isp *pkt, uint8_t);
121 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
122 	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 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
128 	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 	struct imm_ntfy_from_isp *ntfy,
133 	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
134 	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
135 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
136 	struct imm_ntfy_from_isp *imm, int ha_locked);
137 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
138 	fc_port_t *fcport, bool local);
139 void qlt_unreg_sess(struct fc_port *sess);
140 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
141 	struct abts_recv_from_24xx *);
142 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
143     uint16_t);
144 
145 /*
146  * Global Variables
147  */
148 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
149 struct kmem_cache *qla_tgt_plogi_cachep;
150 static mempool_t *qla_tgt_mgmt_cmd_mempool;
151 static struct workqueue_struct *qla_tgt_wq;
152 static DEFINE_MUTEX(qla_tgt_mutex);
153 static LIST_HEAD(qla_tgt_glist);
154 
155 static const char *prot_op_str(u32 prot_op)
156 {
157 	switch (prot_op) {
158 	case TARGET_PROT_NORMAL:	return "NORMAL";
159 	case TARGET_PROT_DIN_INSERT:	return "DIN_INSERT";
160 	case TARGET_PROT_DOUT_INSERT:	return "DOUT_INSERT";
161 	case TARGET_PROT_DIN_STRIP:	return "DIN_STRIP";
162 	case TARGET_PROT_DOUT_STRIP:	return "DOUT_STRIP";
163 	case TARGET_PROT_DIN_PASS:	return "DIN_PASS";
164 	case TARGET_PROT_DOUT_PASS:	return "DOUT_PASS";
165 	default:			return "UNKNOWN";
166 	}
167 }
168 
169 /* This API intentionally takes dest as a parameter, rather than returning
170  * int value to avoid caller forgetting to issue wmb() after the store */
171 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
172 {
173 	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
174 	*dest = atomic_inc_return(&base_vha->generation_tick);
175 	/* memory barrier */
176 	wmb();
177 }
178 
179 /* Might release hw lock, then reaquire!! */
180 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
181 {
182 	/* Send marker if required */
183 	if (unlikely(vha->marker_needed != 0)) {
184 		int rc = qla2x00_issue_marker(vha, vha_locked);
185 		if (rc != QLA_SUCCESS) {
186 			ql_dbg(ql_dbg_tgt, vha, 0xe03d,
187 			    "qla_target(%d): issue_marker() failed\n",
188 			    vha->vp_idx);
189 		}
190 		return rc;
191 	}
192 	return QLA_SUCCESS;
193 }
194 
195 static inline
196 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
197 	uint8_t *d_id)
198 {
199 	struct scsi_qla_host *host;
200 	uint32_t key = 0;
201 
202 	if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
203 	    (vha->d_id.b.al_pa == d_id[2]))
204 		return vha;
205 
206 	key  = (uint32_t)d_id[0] << 16;
207 	key |= (uint32_t)d_id[1] <<  8;
208 	key |= (uint32_t)d_id[2];
209 
210 	host = btree_lookup32(&vha->hw->tgt.host_map, key);
211 	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 static inline
219 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
220 	uint16_t vp_idx)
221 {
222 	struct qla_hw_data *ha = vha->hw;
223 
224 	if (vha->vp_idx == vp_idx)
225 		return vha;
226 
227 	BUG_ON(ha->tgt.tgt_vp_map == NULL);
228 	if (likely(test_bit(vp_idx, ha->vp_idx_map)))
229 		return ha->tgt.tgt_vp_map[vp_idx].vha;
230 
231 	return NULL;
232 }
233 
234 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
235 {
236 	unsigned long flags;
237 
238 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
239 
240 	vha->hw->tgt.num_pend_cmds++;
241 	if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
242 		vha->qla_stats.stat_max_pend_cmds =
243 			vha->hw->tgt.num_pend_cmds;
244 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
245 }
246 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
247 {
248 	unsigned long flags;
249 
250 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
251 	vha->hw->tgt.num_pend_cmds--;
252 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
253 }
254 
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 	struct qla_tgt_sess_op *u;
260 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
261 	unsigned long flags;
262 
263 	if (tgt->tgt_stop) {
264 		ql_dbg(ql_dbg_async, vha, 0x502c,
265 		    "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
266 		    vha->vp_idx);
267 		goto out_term;
268 	}
269 
270 	u = kzalloc(sizeof(*u), GFP_ATOMIC);
271 	if (u == NULL)
272 		goto out_term;
273 
274 	u->vha = vha;
275 	memcpy(&u->atio, atio, sizeof(*atio));
276 	INIT_LIST_HEAD(&u->cmd_list);
277 
278 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
279 	list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
280 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
281 
282 	schedule_delayed_work(&vha->unknown_atio_work, 1);
283 
284 out:
285 	return;
286 
287 out_term:
288 	qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
289 	goto out;
290 }
291 
292 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
293 	uint8_t ha_locked)
294 {
295 	struct qla_tgt_sess_op *u, *t;
296 	scsi_qla_host_t *host;
297 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
298 	unsigned long flags;
299 	uint8_t queued = 0;
300 
301 	list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
302 		if (u->aborted) {
303 			ql_dbg(ql_dbg_async, vha, 0x502e,
304 			    "Freeing unknown %s %p, because of Abort\n",
305 			    "ATIO_TYPE7", u);
306 			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
307 			    &u->atio, ha_locked, 0);
308 			goto abort;
309 		}
310 
311 		host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
312 		if (host != NULL) {
313 			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
314 			    "Requeuing unknown ATIO_TYPE7 %p\n", u);
315 			qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
316 		} else if (tgt->tgt_stop) {
317 			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
318 			    "Freeing unknown %s %p, because tgt is being stopped\n",
319 			    "ATIO_TYPE7", u);
320 			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
321 			    &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 			if (!queued) {
326 				queued = 1;
327 				schedule_delayed_work(&vha->unknown_atio_work,
328 				    1);
329 			}
330 			continue;
331 		}
332 
333 abort:
334 		spin_lock_irqsave(&vha->cmd_list_lock, flags);
335 		list_del(&u->cmd_list);
336 		spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
337 		kfree(u);
338 	}
339 }
340 
341 void qlt_unknown_atio_work_fn(struct work_struct *work)
342 {
343 	struct scsi_qla_host *vha = container_of(to_delayed_work(work),
344 	    struct scsi_qla_host, unknown_atio_work);
345 
346 	qlt_try_to_dequeue_unknown_atios(vha, 0);
347 }
348 
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 	ql_dbg(ql_dbg_tgt, vha, 0xe072,
353 		"%s: qla_target(%d): type %x ox_id %04x\n",
354 		__func__, vha->vp_idx, atio->u.raw.entry_type,
355 		be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
356 
357 	switch (atio->u.raw.entry_type) {
358 	case ATIO_TYPE7:
359 	{
360 		struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
361 		    atio->u.isp24.fcp_hdr.d_id);
362 		if (unlikely(NULL == host)) {
363 			ql_dbg(ql_dbg_tgt, vha, 0xe03e,
364 			    "qla_target(%d): Received ATIO_TYPE7 "
365 			    "with unknown d_id %x:%x:%x\n", vha->vp_idx,
366 			    atio->u.isp24.fcp_hdr.d_id[0],
367 			    atio->u.isp24.fcp_hdr.d_id[1],
368 			    atio->u.isp24.fcp_hdr.d_id[2]);
369 
370 
371 			qlt_queue_unknown_atio(vha, atio, ha_locked);
372 			break;
373 		}
374 		if (unlikely(!list_empty(&vha->unknown_atio_list)))
375 			qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
376 
377 		qlt_24xx_atio_pkt(host, atio, ha_locked);
378 		break;
379 	}
380 
381 	case IMMED_NOTIFY_TYPE:
382 	{
383 		struct scsi_qla_host *host = vha;
384 		struct imm_ntfy_from_isp *entry =
385 		    (struct imm_ntfy_from_isp *)atio;
386 
387 		qlt_issue_marker(vha, ha_locked);
388 
389 		if ((entry->u.isp24.vp_index != 0xFF) &&
390 		    (entry->u.isp24.nport_handle != 0xFFFF)) {
391 			host = qlt_find_host_by_vp_idx(vha,
392 			    entry->u.isp24.vp_index);
393 			if (unlikely(!host)) {
394 				ql_dbg(ql_dbg_tgt, vha, 0xe03f,
395 				    "qla_target(%d): Received "
396 				    "ATIO (IMMED_NOTIFY_TYPE) "
397 				    "with unknown vp_index %d\n",
398 				    vha->vp_idx, entry->u.isp24.vp_index);
399 				break;
400 			}
401 		}
402 		qlt_24xx_atio_pkt(host, atio, ha_locked);
403 		break;
404 	}
405 
406 	case VP_RPT_ID_IOCB_TYPE:
407 		qla24xx_report_id_acquisition(vha,
408 			(struct vp_rpt_id_entry_24xx *)atio);
409 		break;
410 
411 	case ABTS_RECV_24XX:
412 	{
413 		struct abts_recv_from_24xx *entry =
414 			(struct abts_recv_from_24xx *)atio;
415 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
416 			entry->vp_index);
417 		unsigned long flags;
418 
419 		if (unlikely(!host)) {
420 			ql_dbg(ql_dbg_tgt, vha, 0xe00a,
421 			    "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
422 			    "received, with unknown vp_index %d\n",
423 			    vha->vp_idx, entry->vp_index);
424 			break;
425 		}
426 		if (!ha_locked)
427 			spin_lock_irqsave(&host->hw->hardware_lock, flags);
428 		qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
429 		if (!ha_locked)
430 			spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
431 		break;
432 	}
433 
434 	/* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
435 
436 	default:
437 		ql_dbg(ql_dbg_tgt, vha, 0xe040,
438 		    "qla_target(%d): Received unknown ATIO atio "
439 		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
440 		break;
441 	}
442 
443 	return false;
444 }
445 
446 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
447 	struct rsp_que *rsp, response_t *pkt)
448 {
449 	switch (pkt->entry_type) {
450 	case CTIO_CRC2:
451 		ql_dbg(ql_dbg_tgt, vha, 0xe073,
452 			"qla_target(%d):%s: CRC2 Response pkt\n",
453 			vha->vp_idx, __func__);
454 		/* fall through */
455 	case CTIO_TYPE7:
456 	{
457 		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
458 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
459 		    entry->vp_index);
460 		if (unlikely(!host)) {
461 			ql_dbg(ql_dbg_tgt, vha, 0xe041,
462 			    "qla_target(%d): Response pkt (CTIO_TYPE7) "
463 			    "received, with unknown vp_index %d\n",
464 			    vha->vp_idx, entry->vp_index);
465 			break;
466 		}
467 		qlt_response_pkt(host, rsp, pkt);
468 		break;
469 	}
470 
471 	case IMMED_NOTIFY_TYPE:
472 	{
473 		struct scsi_qla_host *host = vha;
474 		struct imm_ntfy_from_isp *entry =
475 		    (struct imm_ntfy_from_isp *)pkt;
476 
477 		host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
478 		if (unlikely(!host)) {
479 			ql_dbg(ql_dbg_tgt, vha, 0xe042,
480 			    "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
481 			    "received, with unknown vp_index %d\n",
482 			    vha->vp_idx, entry->u.isp24.vp_index);
483 			break;
484 		}
485 		qlt_response_pkt(host, rsp, pkt);
486 		break;
487 	}
488 
489 	case NOTIFY_ACK_TYPE:
490 	{
491 		struct scsi_qla_host *host = vha;
492 		struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
493 
494 		if (0xFF != entry->u.isp24.vp_index) {
495 			host = qlt_find_host_by_vp_idx(vha,
496 			    entry->u.isp24.vp_index);
497 			if (unlikely(!host)) {
498 				ql_dbg(ql_dbg_tgt, vha, 0xe043,
499 				    "qla_target(%d): Response "
500 				    "pkt (NOTIFY_ACK_TYPE) "
501 				    "received, with unknown "
502 				    "vp_index %d\n", vha->vp_idx,
503 				    entry->u.isp24.vp_index);
504 				break;
505 			}
506 		}
507 		qlt_response_pkt(host, rsp, pkt);
508 		break;
509 	}
510 
511 	case ABTS_RECV_24XX:
512 	{
513 		struct abts_recv_from_24xx *entry =
514 		    (struct abts_recv_from_24xx *)pkt;
515 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
516 		    entry->vp_index);
517 		if (unlikely(!host)) {
518 			ql_dbg(ql_dbg_tgt, vha, 0xe044,
519 			    "qla_target(%d): Response pkt "
520 			    "(ABTS_RECV_24XX) received, with unknown "
521 			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
522 			break;
523 		}
524 		qlt_response_pkt(host, rsp, pkt);
525 		break;
526 	}
527 
528 	case ABTS_RESP_24XX:
529 	{
530 		struct abts_resp_to_24xx *entry =
531 		    (struct abts_resp_to_24xx *)pkt;
532 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
533 		    entry->vp_index);
534 		if (unlikely(!host)) {
535 			ql_dbg(ql_dbg_tgt, vha, 0xe045,
536 			    "qla_target(%d): Response pkt "
537 			    "(ABTS_RECV_24XX) received, with unknown "
538 			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
539 			break;
540 		}
541 		qlt_response_pkt(host, rsp, pkt);
542 		break;
543 	}
544 
545 	default:
546 		qlt_response_pkt(vha, rsp, pkt);
547 		break;
548 	}
549 
550 }
551 
552 /*
553  * All qlt_plogi_ack_t operations are protected by hardware_lock
554  */
555 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
556 	struct imm_ntfy_from_isp *ntfy, int type)
557 {
558 	struct qla_work_evt *e;
559 	e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
560 	if (!e)
561 		return QLA_FUNCTION_FAILED;
562 
563 	e->u.nack.fcport = fcport;
564 	e->u.nack.type = type;
565 	memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
566 	return qla2x00_post_work(vha, e);
567 }
568 
569 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 	unsigned long flags;
575 
576 	ql_dbg(ql_dbg_disc, vha, 0x20f2,
577 	    "Async done-%s res %x %8phC  type %d\n",
578 	    sp->name, res, sp->fcport->port_name, sp->type);
579 
580 	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
581 	sp->fcport->flags &= ~FCF_ASYNC_SENT;
582 	sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
583 
584 	switch (sp->type) {
585 	case SRB_NACK_PLOGI:
586 		sp->fcport->login_gen++;
587 		sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
588 		sp->fcport->logout_on_delete = 1;
589 		sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
590 		sp->fcport->send_els_logo = 0;
591 		break;
592 
593 	case SRB_NACK_PRLI:
594 		sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
595 		sp->fcport->deleted = 0;
596 		sp->fcport->send_els_logo = 0;
597 
598 		if (!sp->fcport->login_succ &&
599 		    !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
600 			sp->fcport->login_succ = 1;
601 
602 			vha->fcport_count++;
603 
604 			if (!IS_IIDMA_CAPABLE(vha->hw) ||
605 			    !vha->hw->flags.gpsc_supported) {
606 				ql_dbg(ql_dbg_disc, vha, 0x20f3,
607 				    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
608 				    __func__, __LINE__,
609 				    sp->fcport->port_name,
610 				    vha->fcport_count);
611 				sp->fcport->disc_state = DSC_UPD_FCPORT;
612 				qla24xx_post_upd_fcport_work(vha, sp->fcport);
613 			} else {
614 				ql_dbg(ql_dbg_disc, vha, 0x20f5,
615 				    "%s %d %8phC post gpsc fcp_cnt %d\n",
616 				    __func__, __LINE__,
617 				    sp->fcport->port_name,
618 				    vha->fcport_count);
619 
620 				qla24xx_post_gpsc_work(vha, sp->fcport);
621 			}
622 		}
623 		break;
624 
625 	case SRB_NACK_LOGO:
626 		sp->fcport->login_gen++;
627 		sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
628 		qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
629 		break;
630 	}
631 	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
632 
633 	sp->free(sp);
634 }
635 
636 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
637 	struct imm_ntfy_from_isp *ntfy, int type)
638 {
639 	int rval = QLA_FUNCTION_FAILED;
640 	srb_t *sp;
641 	char *c = NULL;
642 
643 	fcport->flags |= FCF_ASYNC_SENT;
644 	switch (type) {
645 	case SRB_NACK_PLOGI:
646 		fcport->fw_login_state = DSC_LS_PLOGI_PEND;
647 		c = "PLOGI";
648 		break;
649 	case SRB_NACK_PRLI:
650 		fcport->fw_login_state = DSC_LS_PRLI_PEND;
651 		fcport->deleted = 0;
652 		c = "PRLI";
653 		break;
654 	case SRB_NACK_LOGO:
655 		fcport->fw_login_state = DSC_LS_LOGO_PEND;
656 		c = "LOGO";
657 		break;
658 	}
659 
660 	sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
661 	if (!sp)
662 		goto done;
663 
664 	sp->type = type;
665 	sp->name = "nack";
666 
667 	sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
668 	qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
669 
670 	sp->u.iocb_cmd.u.nack.ntfy = ntfy;
671 	sp->done = qla2x00_async_nack_sp_done;
672 
673 	rval = qla2x00_start_sp(sp);
674 	if (rval != QLA_SUCCESS)
675 		goto done_free_sp;
676 
677 	ql_dbg(ql_dbg_disc, vha, 0x20f4,
678 	    "Async-%s %8phC hndl %x %s\n",
679 	    sp->name, fcport->port_name, sp->handle, c);
680 
681 	return rval;
682 
683 done_free_sp:
684 	sp->free(sp);
685 done:
686 	fcport->flags &= ~FCF_ASYNC_SENT;
687 	return rval;
688 }
689 
690 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
691 {
692 	fc_port_t *t;
693 	unsigned long flags;
694 
695 	switch (e->u.nack.type) {
696 	case SRB_NACK_PRLI:
697 		mutex_lock(&vha->vha_tgt.tgt_mutex);
698 		t = qlt_create_sess(vha, e->u.nack.fcport, 0);
699 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
700 		if (t) {
701 			ql_log(ql_log_info, vha, 0xd034,
702 			    "%s create sess success %p", __func__, t);
703 			spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
704 			/* create sess has an extra kref */
705 			vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
706 			spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
707 		}
708 		break;
709 	}
710 	qla24xx_async_notify_ack(vha, e->u.nack.fcport,
711 	    (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
712 }
713 
714 void qla24xx_delete_sess_fn(struct work_struct *work)
715 {
716 	fc_port_t *fcport = container_of(work, struct fc_port, del_work);
717 	struct qla_hw_data *ha = fcport->vha->hw;
718 	unsigned long flags;
719 
720 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
721 
722 	if (fcport->se_sess) {
723 		ha->tgt.tgt_ops->shutdown_sess(fcport);
724 		ha->tgt.tgt_ops->put_sess(fcport);
725 	} else {
726 		qlt_unreg_sess(fcport);
727 	}
728 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
729 }
730 
731 /*
732  * Called from qla2x00_reg_remote_port()
733  */
734 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
735 {
736 	struct qla_hw_data *ha = vha->hw;
737 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
738 	struct fc_port *sess = fcport;
739 	unsigned long flags;
740 
741 	if (!vha->hw->tgt.tgt_ops)
742 		return;
743 
744 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
745 	if (tgt->tgt_stop) {
746 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
747 		return;
748 	}
749 
750 	if (fcport->disc_state == DSC_DELETE_PEND) {
751 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
752 		return;
753 	}
754 
755 	if (!sess->se_sess) {
756 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
757 
758 		mutex_lock(&vha->vha_tgt.tgt_mutex);
759 		sess = qlt_create_sess(vha, fcport, false);
760 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
761 
762 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
763 	} else {
764 		if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
765 			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
766 			return;
767 		}
768 
769 		if (!kref_get_unless_zero(&sess->sess_kref)) {
770 			ql_dbg(ql_dbg_disc, vha, 0x2107,
771 			    "%s: kref_get fail sess %8phC \n",
772 			    __func__, sess->port_name);
773 			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
774 			return;
775 		}
776 
777 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
778 		    "qla_target(%u): %ssession for port %8phC "
779 		    "(loop ID %d) reappeared\n", vha->vp_idx,
780 		    sess->local ? "local " : "", sess->port_name, sess->loop_id);
781 
782 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
783 		    "Reappeared sess %p\n", sess);
784 
785 		ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
786 		    fcport->loop_id,
787 		    (fcport->flags & FCF_CONF_COMP_SUPPORTED));
788 	}
789 
790 	if (sess && sess->local) {
791 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
792 		    "qla_target(%u): local session for "
793 		    "port %8phC (loop ID %d) became global\n", vha->vp_idx,
794 		    fcport->port_name, sess->loop_id);
795 		sess->local = 0;
796 	}
797 	ha->tgt.tgt_ops->put_sess(sess);
798 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
799 }
800 
801 /*
802  * This is a zero-base ref-counting solution, since hardware_lock
803  * guarantees that ref_count is not modified concurrently.
804  * Upon successful return content of iocb is undefined
805  */
806 static struct qlt_plogi_ack_t *
807 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
808 		       struct imm_ntfy_from_isp *iocb)
809 {
810 	struct qlt_plogi_ack_t *pla;
811 
812 	list_for_each_entry(pla, &vha->plogi_ack_list, list) {
813 		if (pla->id.b24 == id->b24) {
814 			qlt_send_term_imm_notif(vha, &pla->iocb, 1);
815 			memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
816 			return pla;
817 		}
818 	}
819 
820 	pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
821 	if (!pla) {
822 		ql_dbg(ql_dbg_async, vha, 0x5088,
823 		       "qla_target(%d): Allocation of plogi_ack failed\n",
824 		       vha->vp_idx);
825 		return NULL;
826 	}
827 
828 	memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
829 	pla->id = *id;
830 	list_add_tail(&pla->list, &vha->plogi_ack_list);
831 
832 	return pla;
833 }
834 
835 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
836     struct qlt_plogi_ack_t *pla)
837 {
838 	struct imm_ntfy_from_isp *iocb = &pla->iocb;
839 	port_id_t port_id;
840 	uint16_t loop_id;
841 	fc_port_t *fcport = pla->fcport;
842 
843 	BUG_ON(!pla->ref_count);
844 	pla->ref_count--;
845 
846 	if (pla->ref_count)
847 		return;
848 
849 	ql_dbg(ql_dbg_disc, vha, 0x5089,
850 	    "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
851 	    " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
852 	    iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
853 	    iocb->u.isp24.port_id[0],
854 	    le16_to_cpu(iocb->u.isp24.nport_handle),
855 	    iocb->u.isp24.exchange_address, iocb->ox_id);
856 
857 	port_id.b.domain = iocb->u.isp24.port_id[2];
858 	port_id.b.area   = iocb->u.isp24.port_id[1];
859 	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
860 	port_id.b.rsvd_1 = 0;
861 
862 	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
863 
864 	fcport->loop_id = loop_id;
865 	fcport->d_id = port_id;
866 	if (iocb->u.isp24.status_subcode == ELS_PLOGI)
867 		qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
868 	else
869 		qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
870 
871 	list_for_each_entry(fcport, &vha->vp_fcports, list) {
872 		if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
873 			fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
874 		if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
875 			fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
876 	}
877 
878 	list_del(&pla->list);
879 	kmem_cache_free(qla_tgt_plogi_cachep, pla);
880 }
881 
882 void
883 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
884     struct fc_port *sess, enum qlt_plogi_link_t link)
885 {
886 	struct imm_ntfy_from_isp *iocb = &pla->iocb;
887 	/* Inc ref_count first because link might already be pointing at pla */
888 	pla->ref_count++;
889 
890 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
891 		"Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
892 		" s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
893 		sess, link, sess->port_name,
894 		iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
895 		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
896 		pla->ref_count, pla, link);
897 
898 	if (link == QLT_PLOGI_LINK_CONFLICT) {
899 		switch (sess->disc_state) {
900 		case DSC_DELETED:
901 		case DSC_DELETE_PEND:
902 			pla->ref_count--;
903 			return;
904 		default:
905 			break;
906 		}
907 	}
908 
909 	if (sess->plogi_link[link])
910 		qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
911 
912 	if (link == QLT_PLOGI_LINK_SAME_WWN)
913 		pla->fcport = sess;
914 
915 	sess->plogi_link[link] = pla;
916 }
917 
918 typedef struct {
919 	/* These fields must be initialized by the caller */
920 	port_id_t id;
921 	/*
922 	 * number of cmds dropped while we were waiting for
923 	 * initiator to ack LOGO initialize to 1 if LOGO is
924 	 * triggered by a command, otherwise, to 0
925 	 */
926 	int cmd_count;
927 
928 	/* These fields are used by callee */
929 	struct list_head list;
930 } qlt_port_logo_t;
931 
932 static void
933 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
934 {
935 	qlt_port_logo_t *tmp;
936 	int res;
937 
938 	mutex_lock(&vha->vha_tgt.tgt_mutex);
939 
940 	list_for_each_entry(tmp, &vha->logo_list, list) {
941 		if (tmp->id.b24 == logo->id.b24) {
942 			tmp->cmd_count += logo->cmd_count;
943 			mutex_unlock(&vha->vha_tgt.tgt_mutex);
944 			return;
945 		}
946 	}
947 
948 	list_add_tail(&logo->list, &vha->logo_list);
949 
950 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
951 
952 	res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
953 
954 	mutex_lock(&vha->vha_tgt.tgt_mutex);
955 	list_del(&logo->list);
956 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
957 
958 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
959 	    "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
960 	    logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
961 	    logo->cmd_count, res);
962 }
963 
964 void qlt_free_session_done(struct work_struct *work)
965 {
966 	struct fc_port *sess = container_of(work, struct fc_port,
967 	    free_work);
968 	struct qla_tgt *tgt = sess->tgt;
969 	struct scsi_qla_host *vha = sess->vha;
970 	struct qla_hw_data *ha = vha->hw;
971 	unsigned long flags;
972 	bool logout_started = false;
973 	scsi_qla_host_t *base_vha;
974 	struct qlt_plogi_ack_t *own =
975 		sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
976 
977 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
978 		"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
979 		" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
980 		__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
981 		sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
982 		sess->logout_on_delete, sess->keep_nport_handle,
983 		sess->send_els_logo);
984 
985 	if (!IS_SW_RESV_ADDR(sess->d_id)) {
986 		if (sess->send_els_logo) {
987 			qlt_port_logo_t logo;
988 
989 			logo.id = sess->d_id;
990 			logo.cmd_count = 0;
991 			sess->send_els_logo = 0;
992 			qlt_send_first_logo(vha, &logo);
993 		}
994 
995 		if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
996 			int rc;
997 
998 			if (!own ||
999 			    (own &&
1000 			     (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
1001 				rc = qla2x00_post_async_logout_work(vha, sess,
1002 				    NULL);
1003 				if (rc != QLA_SUCCESS)
1004 					ql_log(ql_log_warn, vha, 0xf085,
1005 					    "Schedule logo failed sess %p rc %d\n",
1006 					    sess, rc);
1007 				else
1008 					logout_started = true;
1009 			} else if (own && (own->iocb.u.isp24.status_subcode ==
1010 				ELS_PRLI) && ha->flags.rida_fmt2) {
1011 				rc = qla2x00_post_async_prlo_work(vha, sess,
1012 				    NULL);
1013 				if (rc != QLA_SUCCESS)
1014 					ql_log(ql_log_warn, vha, 0xf085,
1015 					    "Schedule PRLO failed sess %p rc %d\n",
1016 					    sess, rc);
1017 				else
1018 					logout_started = true;
1019 			}
1020 		}
1021 	}
1022 
1023 	/*
1024 	 * Release the target session for FC Nexus from fabric module code.
1025 	 */
1026 	if (sess->se_sess != NULL)
1027 		ha->tgt.tgt_ops->free_session(sess);
1028 
1029 	if (logout_started) {
1030 		bool traced = false;
1031 
1032 		while (!READ_ONCE(sess->logout_completed)) {
1033 			if (!traced) {
1034 				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1035 					"%s: waiting for sess %p logout\n",
1036 					__func__, sess);
1037 				traced = true;
1038 			}
1039 			msleep(100);
1040 		}
1041 
1042 		ql_dbg(ql_dbg_disc, vha, 0xf087,
1043 		    "%s: sess %p logout completed\n", __func__, sess);
1044 	}
1045 
1046 	if (sess->logo_ack_needed) {
1047 		sess->logo_ack_needed = 0;
1048 		qla24xx_async_notify_ack(vha, sess,
1049 			(struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1050 	}
1051 
1052 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1053 	if (sess->se_sess) {
1054 		sess->se_sess = NULL;
1055 		if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1056 			tgt->sess_count--;
1057 	}
1058 
1059 	sess->disc_state = DSC_DELETED;
1060 	sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1061 	sess->deleted = QLA_SESS_DELETED;
1062 	sess->login_retry = vha->hw->login_retry_count;
1063 
1064 	if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1065 		vha->fcport_count--;
1066 		sess->login_succ = 0;
1067 	}
1068 
1069 	qla2x00_clear_loop_id(sess);
1070 
1071 	if (sess->conflict) {
1072 		sess->conflict->login_pause = 0;
1073 		sess->conflict = NULL;
1074 		if (!test_bit(UNLOADING, &vha->dpc_flags))
1075 			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1076 	}
1077 
1078 	{
1079 		struct qlt_plogi_ack_t *con =
1080 		    sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1081 		struct imm_ntfy_from_isp *iocb;
1082 
1083 		if (con) {
1084 			iocb = &con->iocb;
1085 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1086 				 "se_sess %p / sess %p port %8phC is gone,"
1087 				 " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1088 				 sess->se_sess, sess, sess->port_name,
1089 				 own ? "releasing own PLOGI" : "no own PLOGI pending",
1090 				 own ? own->ref_count : -1,
1091 				 iocb->u.isp24.port_name, con->ref_count);
1092 			qlt_plogi_ack_unref(vha, con);
1093 			sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1094 		} else {
1095 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1096 			    "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1097 			    sess->se_sess, sess, sess->port_name,
1098 			    own ? "releasing own PLOGI" :
1099 			    "no own PLOGI pending",
1100 			    own ? own->ref_count : -1);
1101 		}
1102 
1103 		if (own) {
1104 			sess->fw_login_state = DSC_LS_PLOGI_PEND;
1105 			qlt_plogi_ack_unref(vha, own);
1106 			sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1107 		}
1108 	}
1109 
1110 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1111 
1112 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1113 	    "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1114 		sess, sess->port_name, vha->fcport_count);
1115 
1116 	if (tgt && (tgt->sess_count == 0))
1117 		wake_up_all(&tgt->waitQ);
1118 
1119 	if (vha->fcport_count == 0)
1120 		wake_up_all(&vha->fcport_waitQ);
1121 
1122 	base_vha = pci_get_drvdata(ha->pdev);
1123 
1124 	sess->free_pending = 0;
1125 
1126 	if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1127 		return;
1128 
1129 	if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1130 		switch (vha->host->active_mode) {
1131 		case MODE_INITIATOR:
1132 		case MODE_DUAL:
1133 			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1134 			qla2xxx_wake_dpc(vha);
1135 			break;
1136 		case MODE_TARGET:
1137 		default:
1138 			/* no-op */
1139 			break;
1140 		}
1141 	}
1142 }
1143 
1144 /* ha->tgt.sess_lock supposed to be held on entry */
1145 void qlt_unreg_sess(struct fc_port *sess)
1146 {
1147 	struct scsi_qla_host *vha = sess->vha;
1148 	unsigned long flags;
1149 
1150 	ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1151 	    "%s sess %p for deletion %8phC\n",
1152 	    __func__, sess, sess->port_name);
1153 
1154 	spin_lock_irqsave(&sess->vha->work_lock, flags);
1155 	if (sess->free_pending) {
1156 		spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1157 		return;
1158 	}
1159 	sess->free_pending = 1;
1160 	spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1161 
1162 	if (sess->se_sess)
1163 		vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1164 
1165 	qla2x00_mark_device_lost(vha, sess, 1, 1);
1166 
1167 	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1168 	sess->disc_state = DSC_DELETE_PEND;
1169 	sess->last_rscn_gen = sess->rscn_gen;
1170 	sess->last_login_gen = sess->login_gen;
1171 
1172 	if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1173 	    !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1174 		sess->nvme_flag |= NVME_FLAG_DELETING;
1175 		schedule_work(&sess->nvme_del_work);
1176 	} else {
1177 		INIT_WORK(&sess->free_work, qlt_free_session_done);
1178 		schedule_work(&sess->free_work);
1179 	}
1180 }
1181 EXPORT_SYMBOL(qlt_unreg_sess);
1182 
1183 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1184 {
1185 	struct qla_hw_data *ha = vha->hw;
1186 	struct fc_port *sess = NULL;
1187 	uint16_t loop_id;
1188 	int res = 0;
1189 	struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1190 	unsigned long flags;
1191 
1192 	loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1193 	if (loop_id == 0xFFFF) {
1194 		/* Global event */
1195 		atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1196 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1197 		qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1198 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1199 	} else {
1200 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1201 		sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1202 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1203 	}
1204 
1205 	ql_dbg(ql_dbg_tgt, vha, 0xe000,
1206 	    "Using sess for qla_tgt_reset: %p\n", sess);
1207 	if (!sess) {
1208 		res = -ESRCH;
1209 		return res;
1210 	}
1211 
1212 	ql_dbg(ql_dbg_tgt, vha, 0xe047,
1213 	    "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1214 	    "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1215 	    mcmd, loop_id);
1216 
1217 	return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1218 }
1219 
1220 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1221 {
1222 	if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1223 		sess->logout_on_delete = 0;
1224 		sess->logo_ack_needed = 0;
1225 		sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1226 		sess->scan_state = 0;
1227 	}
1228 }
1229 
1230 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1231 {
1232 	struct qla_tgt *tgt = sess->tgt;
1233 	struct qla_hw_data *ha = sess->vha->hw;
1234 	unsigned long flags;
1235 
1236 	if (sess->disc_state == DSC_DELETE_PEND)
1237 		return;
1238 
1239 	if (sess->disc_state == DSC_DELETED) {
1240 		if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1241 			wake_up_all(&tgt->waitQ);
1242 		if (sess->vha->fcport_count == 0)
1243 			wake_up_all(&sess->vha->fcport_waitQ);
1244 
1245 		if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1246 			!sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1247 			return;
1248 	}
1249 
1250 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1251 	if (sess->deleted == QLA_SESS_DELETED)
1252 		sess->logout_on_delete = 0;
1253 
1254 	if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1255 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1256 		return;
1257 	}
1258 	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1259 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1260 
1261 	sess->disc_state = DSC_DELETE_PEND;
1262 
1263 	qla24xx_chk_fcp_state(sess);
1264 
1265 	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1266 	    "Scheduling sess %p for deletion\n", sess);
1267 
1268 	INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1269 	WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1270 }
1271 
1272 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1273 {
1274 	struct fc_port *sess;
1275 	scsi_qla_host_t *vha = tgt->vha;
1276 
1277 	list_for_each_entry(sess, &vha->vp_fcports, list) {
1278 		if (sess->se_sess)
1279 			qlt_schedule_sess_for_deletion(sess);
1280 	}
1281 
1282 	/* At this point tgt could be already dead */
1283 }
1284 
1285 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1286 	uint16_t *loop_id)
1287 {
1288 	struct qla_hw_data *ha = vha->hw;
1289 	dma_addr_t gid_list_dma;
1290 	struct gid_list_info *gid_list;
1291 	char *id_iter;
1292 	int res, rc, i;
1293 	uint16_t entries;
1294 
1295 	gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1296 	    &gid_list_dma, GFP_KERNEL);
1297 	if (!gid_list) {
1298 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1299 		    "qla_target(%d): DMA Alloc failed of %u\n",
1300 		    vha->vp_idx, qla2x00_gid_list_size(ha));
1301 		return -ENOMEM;
1302 	}
1303 
1304 	/* Get list of logged in devices */
1305 	rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1306 	if (rc != QLA_SUCCESS) {
1307 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1308 		    "qla_target(%d): get_id_list() failed: %x\n",
1309 		    vha->vp_idx, rc);
1310 		res = -EBUSY;
1311 		goto out_free_id_list;
1312 	}
1313 
1314 	id_iter = (char *)gid_list;
1315 	res = -ENOENT;
1316 	for (i = 0; i < entries; i++) {
1317 		struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1318 		if ((gid->al_pa == s_id[2]) &&
1319 		    (gid->area == s_id[1]) &&
1320 		    (gid->domain == s_id[0])) {
1321 			*loop_id = le16_to_cpu(gid->loop_id);
1322 			res = 0;
1323 			break;
1324 		}
1325 		id_iter += ha->gid_list_info_size;
1326 	}
1327 
1328 out_free_id_list:
1329 	dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1330 	    gid_list, gid_list_dma);
1331 	return res;
1332 }
1333 
1334 /*
1335  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1336  * Caller must put it.
1337  */
1338 static struct fc_port *qlt_create_sess(
1339 	struct scsi_qla_host *vha,
1340 	fc_port_t *fcport,
1341 	bool local)
1342 {
1343 	struct qla_hw_data *ha = vha->hw;
1344 	struct fc_port *sess = fcport;
1345 	unsigned long flags;
1346 
1347 	if (vha->vha_tgt.qla_tgt->tgt_stop)
1348 		return NULL;
1349 
1350 	if (fcport->se_sess) {
1351 		if (!kref_get_unless_zero(&sess->sess_kref)) {
1352 			ql_dbg(ql_dbg_disc, vha, 0x20f6,
1353 			    "%s: kref_get_unless_zero failed for %8phC\n",
1354 			    __func__, sess->port_name);
1355 			return NULL;
1356 		}
1357 		return fcport;
1358 	}
1359 	sess->tgt = vha->vha_tgt.qla_tgt;
1360 	sess->local = local;
1361 
1362 	/*
1363 	 * Under normal circumstances we want to logout from firmware when
1364 	 * session eventually ends and release corresponding nport handle.
1365 	 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1366 	 * code will adjust these flags as necessary.
1367 	 */
1368 	sess->logout_on_delete = 1;
1369 	sess->keep_nport_handle = 0;
1370 	sess->logout_completed = 0;
1371 
1372 	if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1373 	    &fcport->port_name[0], sess) < 0) {
1374 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1375 		    "(%d) %8phC check_initiator_node_acl failed\n",
1376 		    vha->vp_idx, fcport->port_name);
1377 		return NULL;
1378 	} else {
1379 		kref_init(&fcport->sess_kref);
1380 		/*
1381 		 * Take an extra reference to ->sess_kref here to handle
1382 		 * fc_port access across ->tgt.sess_lock reaquire.
1383 		 */
1384 		if (!kref_get_unless_zero(&sess->sess_kref)) {
1385 			ql_dbg(ql_dbg_disc, vha, 0x20f7,
1386 			    "%s: kref_get_unless_zero failed for %8phC\n",
1387 			    __func__, sess->port_name);
1388 			return NULL;
1389 		}
1390 
1391 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1392 		if (!IS_SW_RESV_ADDR(sess->d_id))
1393 			vha->vha_tgt.qla_tgt->sess_count++;
1394 
1395 		qlt_do_generation_tick(vha, &sess->generation);
1396 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1397 	}
1398 
1399 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1400 	    "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1401 	    sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1402 	    vha->vha_tgt.qla_tgt->sess_count);
1403 
1404 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1405 	    "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1406 	    "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1407 	    vha->vp_idx, local ?  "local " : "", fcport->port_name,
1408 	    fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1409 	    sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1410 
1411 	return sess;
1412 }
1413 
1414 /*
1415  * max_gen - specifies maximum session generation
1416  * at which this deletion requestion is still valid
1417  */
1418 void
1419 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1420 {
1421 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1422 	struct fc_port *sess = fcport;
1423 	unsigned long flags;
1424 
1425 	if (!vha->hw->tgt.tgt_ops)
1426 		return;
1427 
1428 	if (!tgt)
1429 		return;
1430 
1431 	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1432 	if (tgt->tgt_stop) {
1433 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1434 		return;
1435 	}
1436 	if (!sess->se_sess) {
1437 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1438 		return;
1439 	}
1440 
1441 	if (max_gen - sess->generation < 0) {
1442 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1443 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1444 		    "Ignoring stale deletion request for se_sess %p / sess %p"
1445 		    " for port %8phC, req_gen %d, sess_gen %d\n",
1446 		    sess->se_sess, sess, sess->port_name, max_gen,
1447 		    sess->generation);
1448 		return;
1449 	}
1450 
1451 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1452 
1453 	sess->local = 1;
1454 	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1455 	qlt_schedule_sess_for_deletion(sess);
1456 }
1457 
1458 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1459 {
1460 	struct qla_hw_data *ha = tgt->ha;
1461 	unsigned long flags;
1462 	int res;
1463 	/*
1464 	 * We need to protect against race, when tgt is freed before or
1465 	 * inside wake_up()
1466 	 */
1467 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1468 	ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1469 	    "tgt %p, sess_count=%d\n",
1470 	    tgt, tgt->sess_count);
1471 	res = (tgt->sess_count == 0);
1472 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1473 
1474 	return res;
1475 }
1476 
1477 /* Called by tcm_qla2xxx configfs code */
1478 int qlt_stop_phase1(struct qla_tgt *tgt)
1479 {
1480 	struct scsi_qla_host *vha = tgt->vha;
1481 	struct qla_hw_data *ha = tgt->ha;
1482 	unsigned long flags;
1483 
1484 	mutex_lock(&qla_tgt_mutex);
1485 	if (!vha->fc_vport) {
1486 		struct Scsi_Host *sh = vha->host;
1487 		struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1488 		bool npiv_vports;
1489 
1490 		spin_lock_irqsave(sh->host_lock, flags);
1491 		npiv_vports = (fc_host->npiv_vports_inuse);
1492 		spin_unlock_irqrestore(sh->host_lock, flags);
1493 
1494 		if (npiv_vports) {
1495 			mutex_unlock(&qla_tgt_mutex);
1496 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1497 			    "NPIV is in use. Can not stop target\n");
1498 			return -EPERM;
1499 		}
1500 	}
1501 	if (tgt->tgt_stop || tgt->tgt_stopped) {
1502 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1503 		    "Already in tgt->tgt_stop or tgt_stopped state\n");
1504 		mutex_unlock(&qla_tgt_mutex);
1505 		return -EPERM;
1506 	}
1507 
1508 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1509 	    vha->host_no, vha);
1510 	/*
1511 	 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1512 	 * Lock is needed, because we still can get an incoming packet.
1513 	 */
1514 	mutex_lock(&vha->vha_tgt.tgt_mutex);
1515 	tgt->tgt_stop = 1;
1516 	qlt_clear_tgt_db(tgt);
1517 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1518 	mutex_unlock(&qla_tgt_mutex);
1519 
1520 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1521 	    "Waiting for sess works (tgt %p)", tgt);
1522 	spin_lock_irqsave(&tgt->sess_work_lock, flags);
1523 	while (!list_empty(&tgt->sess_works_list)) {
1524 		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1525 		flush_scheduled_work();
1526 		spin_lock_irqsave(&tgt->sess_work_lock, flags);
1527 	}
1528 	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1529 
1530 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1531 	    "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1532 
1533 	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1534 
1535 	/* Big hammer */
1536 	if (!ha->flags.host_shutting_down &&
1537 	    (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1538 		qlt_disable_vha(vha);
1539 
1540 	/* Wait for sessions to clear out (just in case) */
1541 	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1542 	return 0;
1543 }
1544 EXPORT_SYMBOL(qlt_stop_phase1);
1545 
1546 /* Called by tcm_qla2xxx configfs code */
1547 void qlt_stop_phase2(struct qla_tgt *tgt)
1548 {
1549 	scsi_qla_host_t *vha = tgt->vha;
1550 
1551 	if (tgt->tgt_stopped) {
1552 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1553 		    "Already in tgt->tgt_stopped state\n");
1554 		dump_stack();
1555 		return;
1556 	}
1557 	if (!tgt->tgt_stop) {
1558 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1559 		    "%s: phase1 stop is not completed\n", __func__);
1560 		dump_stack();
1561 		return;
1562 	}
1563 
1564 	mutex_lock(&vha->vha_tgt.tgt_mutex);
1565 	tgt->tgt_stop = 0;
1566 	tgt->tgt_stopped = 1;
1567 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1568 
1569 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1570 	    tgt);
1571 }
1572 EXPORT_SYMBOL(qlt_stop_phase2);
1573 
1574 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1575 static void qlt_release(struct qla_tgt *tgt)
1576 {
1577 	scsi_qla_host_t *vha = tgt->vha;
1578 	void *node;
1579 	u64 key = 0;
1580 	u16 i;
1581 	struct qla_qpair_hint *h;
1582 	struct qla_hw_data *ha = vha->hw;
1583 
1584 	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1585 	    !tgt->tgt_stopped)
1586 		qlt_stop_phase1(tgt);
1587 
1588 	if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1589 		qlt_stop_phase2(tgt);
1590 
1591 	for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1592 		unsigned long flags;
1593 
1594 		h = &tgt->qphints[i];
1595 		if (h->qpair) {
1596 			spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1597 			list_del(&h->hint_elem);
1598 			spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1599 			h->qpair = NULL;
1600 		}
1601 	}
1602 	kfree(tgt->qphints);
1603 	mutex_lock(&qla_tgt_mutex);
1604 	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1605 	mutex_unlock(&qla_tgt_mutex);
1606 
1607 	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1608 		btree_remove64(&tgt->lun_qpair_map, key);
1609 
1610 	btree_destroy64(&tgt->lun_qpair_map);
1611 
1612 	if (vha->vp_idx)
1613 		if (ha->tgt.tgt_ops &&
1614 		    ha->tgt.tgt_ops->remove_target &&
1615 		    vha->vha_tgt.target_lport_ptr)
1616 			ha->tgt.tgt_ops->remove_target(vha);
1617 
1618 	vha->vha_tgt.qla_tgt = NULL;
1619 
1620 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1621 	    "Release of tgt %p finished\n", tgt);
1622 
1623 	kfree(tgt);
1624 }
1625 
1626 /* ha->hardware_lock supposed to be held on entry */
1627 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1628 	const void *param, unsigned int param_size)
1629 {
1630 	struct qla_tgt_sess_work_param *prm;
1631 	unsigned long flags;
1632 
1633 	prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1634 	if (!prm) {
1635 		ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1636 		    "qla_target(%d): Unable to create session "
1637 		    "work, command will be refused", 0);
1638 		return -ENOMEM;
1639 	}
1640 
1641 	ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1642 	    "Scheduling work (type %d, prm %p)"
1643 	    " to find session for param %p (size %d, tgt %p)\n",
1644 	    type, prm, param, param_size, tgt);
1645 
1646 	prm->type = type;
1647 	memcpy(&prm->tm_iocb, param, param_size);
1648 
1649 	spin_lock_irqsave(&tgt->sess_work_lock, flags);
1650 	list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1651 	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1652 
1653 	schedule_work(&tgt->sess_work);
1654 
1655 	return 0;
1656 }
1657 
1658 /*
1659  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1660  */
1661 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1662 	struct imm_ntfy_from_isp *ntfy,
1663 	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1664 	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1665 {
1666 	struct scsi_qla_host *vha = qpair->vha;
1667 	struct qla_hw_data *ha = vha->hw;
1668 	request_t *pkt;
1669 	struct nack_to_isp *nack;
1670 
1671 	if (!ha->flags.fw_started)
1672 		return;
1673 
1674 	ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1675 
1676 	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1677 	if (!pkt) {
1678 		ql_dbg(ql_dbg_tgt, vha, 0xe049,
1679 		    "qla_target(%d): %s failed: unable to allocate "
1680 		    "request packet\n", vha->vp_idx, __func__);
1681 		return;
1682 	}
1683 
1684 	if (vha->vha_tgt.qla_tgt != NULL)
1685 		vha->vha_tgt.qla_tgt->notify_ack_expected++;
1686 
1687 	pkt->entry_type = NOTIFY_ACK_TYPE;
1688 	pkt->entry_count = 1;
1689 
1690 	nack = (struct nack_to_isp *)pkt;
1691 	nack->ox_id = ntfy->ox_id;
1692 
1693 	nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1694 	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1695 	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1696 		nack->u.isp24.flags = ntfy->u.isp24.flags &
1697 			cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1698 	}
1699 	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1700 	nack->u.isp24.status = ntfy->u.isp24.status;
1701 	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1702 	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1703 	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1704 	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1705 	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1706 	nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1707 	nack->u.isp24.srr_reject_code = srr_reject_code;
1708 	nack->u.isp24.srr_reject_code_expl = srr_explan;
1709 	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1710 
1711 	ql_dbg(ql_dbg_tgt, vha, 0xe005,
1712 	    "qla_target(%d): Sending 24xx Notify Ack %d\n",
1713 	    vha->vp_idx, nack->u.isp24.status);
1714 
1715 	/* Memory Barrier */
1716 	wmb();
1717 	qla2x00_start_iocbs(vha, qpair->req);
1718 }
1719 
1720 /*
1721  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1722  */
1723 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1724 	struct abts_recv_from_24xx *abts, uint32_t status,
1725 	bool ids_reversed)
1726 {
1727 	struct scsi_qla_host *vha = qpair->vha;
1728 	struct qla_hw_data *ha = vha->hw;
1729 	struct abts_resp_to_24xx *resp;
1730 	uint32_t f_ctl;
1731 	uint8_t *p;
1732 
1733 	ql_dbg(ql_dbg_tgt, vha, 0xe006,
1734 	    "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1735 	    ha, abts, status);
1736 
1737 	resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1738 	    NULL);
1739 	if (!resp) {
1740 		ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1741 		    "qla_target(%d): %s failed: unable to allocate "
1742 		    "request packet", vha->vp_idx, __func__);
1743 		return;
1744 	}
1745 
1746 	resp->entry_type = ABTS_RESP_24XX;
1747 	resp->entry_count = 1;
1748 	resp->nport_handle = abts->nport_handle;
1749 	resp->vp_index = vha->vp_idx;
1750 	resp->sof_type = abts->sof_type;
1751 	resp->exchange_address = abts->exchange_address;
1752 	resp->fcp_hdr_le = abts->fcp_hdr_le;
1753 	f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1754 	    F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1755 	    F_CTL_SEQ_INITIATIVE);
1756 	p = (uint8_t *)&f_ctl;
1757 	resp->fcp_hdr_le.f_ctl[0] = *p++;
1758 	resp->fcp_hdr_le.f_ctl[1] = *p++;
1759 	resp->fcp_hdr_le.f_ctl[2] = *p;
1760 	if (ids_reversed) {
1761 		resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1762 		resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1763 		resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1764 		resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1765 		resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1766 		resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1767 	} else {
1768 		resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1769 		resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1770 		resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1771 		resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1772 		resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1773 		resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1774 	}
1775 	resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1776 	if (status == FCP_TMF_CMPL) {
1777 		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1778 		resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1779 		resp->payload.ba_acct.low_seq_cnt = 0x0000;
1780 		resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1781 		resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1782 		resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1783 	} else {
1784 		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1785 		resp->payload.ba_rjt.reason_code =
1786 			BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1787 		/* Other bytes are zero */
1788 	}
1789 
1790 	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1791 
1792 	/* Memory Barrier */
1793 	wmb();
1794 	if (qpair->reqq_start_iocbs)
1795 		qpair->reqq_start_iocbs(qpair);
1796 	else
1797 		qla2x00_start_iocbs(vha, qpair->req);
1798 }
1799 
1800 /*
1801  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1802  */
1803 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1804 	struct abts_resp_from_24xx_fw *entry)
1805 {
1806 	struct ctio7_to_24xx *ctio;
1807 
1808 	ql_dbg(ql_dbg_tgt, vha, 0xe007,
1809 	    "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1810 
1811 	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1812 	    vha->hw->base_qpair, NULL);
1813 	if (ctio == NULL) {
1814 		ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1815 		    "qla_target(%d): %s failed: unable to allocate "
1816 		    "request packet\n", vha->vp_idx, __func__);
1817 		return;
1818 	}
1819 
1820 	/*
1821 	 * We've got on entrance firmware's response on by us generated
1822 	 * ABTS response. So, in it ID fields are reversed.
1823 	 */
1824 
1825 	ctio->entry_type = CTIO_TYPE7;
1826 	ctio->entry_count = 1;
1827 	ctio->nport_handle = entry->nport_handle;
1828 	ctio->handle = QLA_TGT_SKIP_HANDLE |	CTIO_COMPLETION_HANDLE_MARK;
1829 	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1830 	ctio->vp_index = vha->vp_idx;
1831 	ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1832 	ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1833 	ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1834 	ctio->exchange_addr = entry->exchange_addr_to_abort;
1835 	ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1836 					    CTIO7_FLAGS_TERMINATE);
1837 	ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1838 
1839 	/* Memory Barrier */
1840 	wmb();
1841 	qla2x00_start_iocbs(vha, vha->req);
1842 
1843 	qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1844 	    (struct abts_recv_from_24xx *)entry,
1845 	    FCP_TMF_CMPL, true);
1846 }
1847 
1848 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1849 {
1850 	struct qla_tgt_sess_op *op;
1851 	struct qla_tgt_cmd *cmd;
1852 	unsigned long flags;
1853 
1854 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
1855 	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1856 		if (tag == op->atio.u.isp24.exchange_addr) {
1857 			op->aborted = true;
1858 			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1859 			return 1;
1860 		}
1861 	}
1862 
1863 	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1864 		if (tag == op->atio.u.isp24.exchange_addr) {
1865 			op->aborted = true;
1866 			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1867 			return 1;
1868 		}
1869 	}
1870 
1871 	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1872 		if (tag == cmd->atio.u.isp24.exchange_addr) {
1873 			cmd->aborted = 1;
1874 			spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1875 			return 1;
1876 		}
1877 	}
1878 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1879 
1880 	return 0;
1881 }
1882 
1883 /* drop cmds for the given lun
1884  * XXX only looks for cmds on the port through which lun reset was recieved
1885  * XXX does not go through the list of other port (which may have cmds
1886  *     for the same lun)
1887  */
1888 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1889 			        u64 lun, uint8_t *s_id)
1890 {
1891 	struct qla_tgt_sess_op *op;
1892 	struct qla_tgt_cmd *cmd;
1893 	uint32_t key;
1894 	unsigned long flags;
1895 
1896 	key = sid_to_key(s_id);
1897 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
1898 	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1899 		uint32_t op_key;
1900 		u64 op_lun;
1901 
1902 		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1903 		op_lun = scsilun_to_int(
1904 			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1905 		if (op_key == key && op_lun == lun)
1906 			op->aborted = true;
1907 	}
1908 
1909 	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1910 		uint32_t op_key;
1911 		u64 op_lun;
1912 
1913 		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1914 		op_lun = scsilun_to_int(
1915 			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1916 		if (op_key == key && op_lun == lun)
1917 			op->aborted = true;
1918 	}
1919 
1920 	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1921 		uint32_t cmd_key;
1922 		u64 cmd_lun;
1923 
1924 		cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1925 		cmd_lun = scsilun_to_int(
1926 			(struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1927 		if (cmd_key == key && cmd_lun == lun)
1928 			cmd->aborted = 1;
1929 	}
1930 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1931 }
1932 
1933 /* ha->hardware_lock supposed to be held on entry */
1934 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1935 	struct abts_recv_from_24xx *abts, struct fc_port *sess)
1936 {
1937 	struct qla_hw_data *ha = vha->hw;
1938 	struct qla_tgt_mgmt_cmd *mcmd;
1939 	int rc;
1940 
1941 	if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1942 		/* send TASK_ABORT response immediately */
1943 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
1944 		return 0;
1945 	}
1946 
1947 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1948 	    "qla_target(%d): task abort (tag=%d)\n",
1949 	    vha->vp_idx, abts->exchange_addr_to_abort);
1950 
1951 	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1952 	if (mcmd == NULL) {
1953 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1954 		    "qla_target(%d): %s: Allocation of ABORT cmd failed",
1955 		    vha->vp_idx, __func__);
1956 		return -ENOMEM;
1957 	}
1958 	memset(mcmd, 0, sizeof(*mcmd));
1959 
1960 	mcmd->sess = sess;
1961 	memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1962 	mcmd->reset_count = ha->base_qpair->chip_reset;
1963 	mcmd->tmr_func = QLA_TGT_ABTS;
1964 	mcmd->qpair = ha->base_qpair;
1965 	mcmd->vha = vha;
1966 
1967 	/*
1968 	 * LUN is looked up by target-core internally based on the passed
1969 	 * abts->exchange_addr_to_abort tag.
1970 	 */
1971 	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
1972 	    abts->exchange_addr_to_abort);
1973 	if (rc != 0) {
1974 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1975 		    "qla_target(%d):  tgt_ops->handle_tmr()"
1976 		    " failed: %d", vha->vp_idx, rc);
1977 		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1978 		return -EFAULT;
1979 	}
1980 
1981 	return 0;
1982 }
1983 
1984 /*
1985  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1986  */
1987 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1988 	struct abts_recv_from_24xx *abts)
1989 {
1990 	struct qla_hw_data *ha = vha->hw;
1991 	struct fc_port *sess;
1992 	uint32_t tag = abts->exchange_addr_to_abort;
1993 	uint8_t s_id[3];
1994 	int rc;
1995 	unsigned long flags;
1996 
1997 	if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1998 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1999 		    "qla_target(%d): ABTS: Abort Sequence not "
2000 		    "supported\n", vha->vp_idx);
2001 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2002 		    false);
2003 		return;
2004 	}
2005 
2006 	if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2007 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2008 		    "qla_target(%d): ABTS: Unknown Exchange "
2009 		    "Address received\n", vha->vp_idx);
2010 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2011 		    false);
2012 		return;
2013 	}
2014 
2015 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2016 	    "qla_target(%d): task abort (s_id=%x:%x:%x, "
2017 	    "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
2018 	    abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
2019 	    le32_to_cpu(abts->fcp_hdr_le.parameter));
2020 
2021 	s_id[0] = abts->fcp_hdr_le.s_id[2];
2022 	s_id[1] = abts->fcp_hdr_le.s_id[1];
2023 	s_id[2] = abts->fcp_hdr_le.s_id[0];
2024 
2025 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2026 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2027 	if (!sess) {
2028 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2029 		    "qla_target(%d): task abort for non-existent session\n",
2030 		    vha->vp_idx);
2031 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2032 
2033 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2034 			    false);
2035 		return;
2036 	}
2037 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2038 
2039 
2040 	if (sess->deleted) {
2041 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2042 		    false);
2043 		return;
2044 	}
2045 
2046 	rc = __qlt_24xx_handle_abts(vha, abts, sess);
2047 	if (rc != 0) {
2048 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2049 		    "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2050 		    vha->vp_idx, rc);
2051 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2052 		    false);
2053 		return;
2054 	}
2055 }
2056 
2057 /*
2058  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2059  */
2060 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2061 	struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2062 {
2063 	struct scsi_qla_host *ha = mcmd->vha;
2064 	struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2065 	struct ctio7_to_24xx *ctio;
2066 	uint16_t temp;
2067 
2068 	ql_dbg(ql_dbg_tgt, ha, 0xe008,
2069 	    "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2070 	    ha, atio, resp_code);
2071 
2072 
2073 	ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2074 	if (ctio == NULL) {
2075 		ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2076 		    "qla_target(%d): %s failed: unable to allocate "
2077 		    "request packet\n", ha->vp_idx, __func__);
2078 		return;
2079 	}
2080 
2081 	ctio->entry_type = CTIO_TYPE7;
2082 	ctio->entry_count = 1;
2083 	ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2084 	ctio->nport_handle = mcmd->sess->loop_id;
2085 	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2086 	ctio->vp_index = ha->vp_idx;
2087 	ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2088 	ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2089 	ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2090 	ctio->exchange_addr = atio->u.isp24.exchange_addr;
2091 	temp = (atio->u.isp24.attr << 9)|
2092 		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2093 	ctio->u.status1.flags = cpu_to_le16(temp);
2094 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2095 	ctio->u.status1.ox_id = cpu_to_le16(temp);
2096 	ctio->u.status1.scsi_status =
2097 	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2098 	ctio->u.status1.response_len = cpu_to_le16(8);
2099 	ctio->u.status1.sense_data[0] = resp_code;
2100 
2101 	/* Memory Barrier */
2102 	wmb();
2103 	if (qpair->reqq_start_iocbs)
2104 		qpair->reqq_start_iocbs(qpair);
2105 	else
2106 		qla2x00_start_iocbs(ha, qpair->req);
2107 }
2108 
2109 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2110 {
2111 	mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2112 }
2113 EXPORT_SYMBOL(qlt_free_mcmd);
2114 
2115 /*
2116  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2117  * reacquire
2118  */
2119 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2120     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2121 {
2122 	struct atio_from_isp *atio = &cmd->atio;
2123 	struct ctio7_to_24xx *ctio;
2124 	uint16_t temp;
2125 	struct scsi_qla_host *vha = cmd->vha;
2126 
2127 	ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2128 	    "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2129 	    "sense_key=%02x, asc=%02x, ascq=%02x",
2130 	    vha, atio, scsi_status, sense_key, asc, ascq);
2131 
2132 	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2133 	if (!ctio) {
2134 		ql_dbg(ql_dbg_async, vha, 0x3067,
2135 		    "qla2x00t(%ld): %s failed: unable to allocate request packet",
2136 		    vha->host_no, __func__);
2137 		goto out;
2138 	}
2139 
2140 	ctio->entry_type = CTIO_TYPE7;
2141 	ctio->entry_count = 1;
2142 	ctio->handle = QLA_TGT_SKIP_HANDLE;
2143 	ctio->nport_handle = cmd->sess->loop_id;
2144 	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2145 	ctio->vp_index = vha->vp_idx;
2146 	ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2147 	ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2148 	ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2149 	ctio->exchange_addr = atio->u.isp24.exchange_addr;
2150 	temp = (atio->u.isp24.attr << 9) |
2151 	    CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2152 	ctio->u.status1.flags = cpu_to_le16(temp);
2153 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2154 	ctio->u.status1.ox_id = cpu_to_le16(temp);
2155 	ctio->u.status1.scsi_status =
2156 	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2157 	ctio->u.status1.response_len = cpu_to_le16(18);
2158 	ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2159 
2160 	if (ctio->u.status1.residual != 0)
2161 		ctio->u.status1.scsi_status |=
2162 		    cpu_to_le16(SS_RESIDUAL_UNDER);
2163 
2164 	/* Response code and sense key */
2165 	put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2166 	    (&ctio->u.status1.sense_data)[0]);
2167 	/* Additional sense length */
2168 	put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2169 	/* ASC and ASCQ */
2170 	put_unaligned_le32(((asc << 24) | (ascq << 16)),
2171 	    (&ctio->u.status1.sense_data)[3]);
2172 
2173 	/* Memory Barrier */
2174 	wmb();
2175 
2176 	if (qpair->reqq_start_iocbs)
2177 		qpair->reqq_start_iocbs(qpair);
2178 	else
2179 		qla2x00_start_iocbs(vha, qpair->req);
2180 
2181 out:
2182 	return;
2183 }
2184 
2185 /* callback from target fabric module code */
2186 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2187 {
2188 	struct scsi_qla_host *vha = mcmd->sess->vha;
2189 	struct qla_hw_data *ha = vha->hw;
2190 	unsigned long flags;
2191 	struct qla_qpair *qpair = mcmd->qpair;
2192 
2193 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2194 	    "TM response mcmd (%p) status %#x state %#x",
2195 	    mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2196 
2197 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2198 
2199 	if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2200 		/*
2201 		 * Either the port is not online or this request was from
2202 		 * previous life, just abort the processing.
2203 		 */
2204 		ql_dbg(ql_dbg_async, vha, 0xe100,
2205 			"RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2206 			vha->flags.online, qla2x00_reset_active(vha),
2207 			mcmd->reset_count, qpair->chip_reset);
2208 		ha->tgt.tgt_ops->free_mcmd(mcmd);
2209 		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2210 		return;
2211 	}
2212 
2213 	if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2214 		if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2215 		    ELS_LOGO ||
2216 		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2217 		    ELS_PRLO ||
2218 		    mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2219 		    ELS_TPRLO) {
2220 			ql_dbg(ql_dbg_disc, vha, 0x2106,
2221 			    "TM response logo %phC status %#x state %#x",
2222 			    mcmd->sess->port_name, mcmd->fc_tm_rsp,
2223 			    mcmd->flags);
2224 			qlt_schedule_sess_for_deletion(mcmd->sess);
2225 		} else {
2226 			qlt_send_notify_ack(vha->hw->base_qpair,
2227 			    &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2228 		}
2229 	} else {
2230 		if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2231 			qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2232 			    mcmd->fc_tm_rsp, false);
2233 		else
2234 			qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2235 			    mcmd->fc_tm_rsp);
2236 	}
2237 	/*
2238 	 * Make the callback for ->free_mcmd() to queue_work() and invoke
2239 	 * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2240 	 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2241 	 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2242 	 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2243 	 * qlt_xmit_tm_rsp() returns here..
2244 	 */
2245 	ha->tgt.tgt_ops->free_mcmd(mcmd);
2246 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2247 }
2248 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2249 
2250 /* No locks */
2251 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2252 {
2253 	struct qla_tgt_cmd *cmd = prm->cmd;
2254 
2255 	BUG_ON(cmd->sg_cnt == 0);
2256 
2257 	prm->sg = (struct scatterlist *)cmd->sg;
2258 	prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2259 	    cmd->sg_cnt, cmd->dma_data_direction);
2260 	if (unlikely(prm->seg_cnt == 0))
2261 		goto out_err;
2262 
2263 	prm->cmd->sg_mapped = 1;
2264 
2265 	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2266 		/*
2267 		 * If greater than four sg entries then we need to allocate
2268 		 * the continuation entries
2269 		 */
2270 		if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2271 			prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2272 			QLA_TGT_DATASEGS_PER_CMD_24XX,
2273 			QLA_TGT_DATASEGS_PER_CONT_24XX);
2274 	} else {
2275 		/* DIF */
2276 		if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2277 		    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2278 			prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2279 			prm->tot_dsds = prm->seg_cnt;
2280 		} else
2281 			prm->tot_dsds = prm->seg_cnt;
2282 
2283 		if (cmd->prot_sg_cnt) {
2284 			prm->prot_sg      = cmd->prot_sg;
2285 			prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2286 				cmd->prot_sg, cmd->prot_sg_cnt,
2287 				cmd->dma_data_direction);
2288 			if (unlikely(prm->prot_seg_cnt == 0))
2289 				goto out_err;
2290 
2291 			if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2292 			    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2293 				/* Dif Bundling not support here */
2294 				prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2295 								cmd->blk_sz);
2296 				prm->tot_dsds += prm->prot_seg_cnt;
2297 			} else
2298 				prm->tot_dsds += prm->prot_seg_cnt;
2299 		}
2300 	}
2301 
2302 	return 0;
2303 
2304 out_err:
2305 	ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2306 	    "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2307 	    0, prm->cmd->sg_cnt);
2308 	return -1;
2309 }
2310 
2311 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2312 {
2313 	struct qla_hw_data *ha;
2314 	struct qla_qpair *qpair;
2315 	if (!cmd->sg_mapped)
2316 		return;
2317 
2318 	qpair = cmd->qpair;
2319 
2320 	pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2321 	    cmd->dma_data_direction);
2322 	cmd->sg_mapped = 0;
2323 
2324 	if (cmd->prot_sg_cnt)
2325 		pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2326 			cmd->dma_data_direction);
2327 
2328 	if (!cmd->ctx)
2329 		return;
2330 	ha = vha->hw;
2331 	if (cmd->ctx_dsd_alloced)
2332 		qla2x00_clean_dsd_pool(ha, cmd->ctx);
2333 
2334 	dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2335 }
2336 
2337 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2338 	uint32_t req_cnt)
2339 {
2340 	uint32_t cnt;
2341 	struct req_que *req = qpair->req;
2342 
2343 	if (req->cnt < (req_cnt + 2)) {
2344 		cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2345 		    RD_REG_DWORD_RELAXED(req->req_q_out));
2346 
2347 		if  (req->ring_index < cnt)
2348 			req->cnt = cnt - req->ring_index;
2349 		else
2350 			req->cnt = req->length - (req->ring_index - cnt);
2351 
2352 		if (unlikely(req->cnt < (req_cnt + 2)))
2353 			return -EAGAIN;
2354 	}
2355 
2356 	req->cnt -= req_cnt;
2357 
2358 	return 0;
2359 }
2360 
2361 /*
2362  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2363  */
2364 static inline void *qlt_get_req_pkt(struct req_que *req)
2365 {
2366 	/* Adjust ring index. */
2367 	req->ring_index++;
2368 	if (req->ring_index == req->length) {
2369 		req->ring_index = 0;
2370 		req->ring_ptr = req->ring;
2371 	} else {
2372 		req->ring_ptr++;
2373 	}
2374 	return (cont_entry_t *)req->ring_ptr;
2375 }
2376 
2377 /* ha->hardware_lock supposed to be held on entry */
2378 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2379 {
2380 	uint32_t h;
2381 	int index;
2382 	uint8_t found = 0;
2383 	struct req_que *req = qpair->req;
2384 
2385 	h = req->current_outstanding_cmd;
2386 
2387 	for (index = 1; index < req->num_outstanding_cmds; index++) {
2388 		h++;
2389 		if (h == req->num_outstanding_cmds)
2390 			h = 1;
2391 
2392 		if (h == QLA_TGT_SKIP_HANDLE)
2393 			continue;
2394 
2395 		if (!req->outstanding_cmds[h]) {
2396 			found = 1;
2397 			break;
2398 		}
2399 	}
2400 
2401 	if (found) {
2402 		req->current_outstanding_cmd = h;
2403 	} else {
2404 		ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2405 		    "qla_target(%d): Ran out of empty cmd slots\n",
2406 		    qpair->vha->vp_idx);
2407 		h = QLA_TGT_NULL_HANDLE;
2408 	}
2409 
2410 	return h;
2411 }
2412 
2413 /* ha->hardware_lock supposed to be held on entry */
2414 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2415 	struct qla_tgt_prm *prm)
2416 {
2417 	uint32_t h;
2418 	struct ctio7_to_24xx *pkt;
2419 	struct atio_from_isp *atio = &prm->cmd->atio;
2420 	uint16_t temp;
2421 
2422 	pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2423 	prm->pkt = pkt;
2424 	memset(pkt, 0, sizeof(*pkt));
2425 
2426 	pkt->entry_type = CTIO_TYPE7;
2427 	pkt->entry_count = (uint8_t)prm->req_cnt;
2428 	pkt->vp_index = prm->cmd->vp_idx;
2429 
2430 	h = qlt_make_handle(qpair);
2431 	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2432 		/*
2433 		 * CTIO type 7 from the firmware doesn't provide a way to
2434 		 * know the initiator's LOOP ID, hence we can't find
2435 		 * the session and, so, the command.
2436 		 */
2437 		return -EAGAIN;
2438 	} else
2439 		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2440 
2441 	pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2442 	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2443 	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2444 	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2445 	pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2446 	pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2447 	pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2448 	pkt->exchange_addr = atio->u.isp24.exchange_addr;
2449 	temp = atio->u.isp24.attr << 9;
2450 	pkt->u.status0.flags |= cpu_to_le16(temp);
2451 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2452 	pkt->u.status0.ox_id = cpu_to_le16(temp);
2453 	pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2454 
2455 	return 0;
2456 }
2457 
2458 /*
2459  * ha->hardware_lock supposed to be held on entry. We have already made sure
2460  * that there is sufficient amount of request entries to not drop it.
2461  */
2462 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2463 {
2464 	int cnt;
2465 	uint32_t *dword_ptr;
2466 
2467 	/* Build continuation packets */
2468 	while (prm->seg_cnt > 0) {
2469 		cont_a64_entry_t *cont_pkt64 =
2470 			(cont_a64_entry_t *)qlt_get_req_pkt(
2471 			   prm->cmd->qpair->req);
2472 
2473 		/*
2474 		 * Make sure that from cont_pkt64 none of
2475 		 * 64-bit specific fields used for 32-bit
2476 		 * addressing. Cast to (cont_entry_t *) for
2477 		 * that.
2478 		 */
2479 
2480 		memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2481 
2482 		cont_pkt64->entry_count = 1;
2483 		cont_pkt64->sys_define = 0;
2484 
2485 		cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2486 		dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2487 
2488 		/* Load continuation entry data segments */
2489 		for (cnt = 0;
2490 		    cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2491 		    cnt++, prm->seg_cnt--) {
2492 			*dword_ptr++ =
2493 			    cpu_to_le32(pci_dma_lo32
2494 				(sg_dma_address(prm->sg)));
2495 			*dword_ptr++ = cpu_to_le32(pci_dma_hi32
2496 			    (sg_dma_address(prm->sg)));
2497 			*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2498 
2499 			prm->sg = sg_next(prm->sg);
2500 		}
2501 	}
2502 }
2503 
2504 /*
2505  * ha->hardware_lock supposed to be held on entry. We have already made sure
2506  * that there is sufficient amount of request entries to not drop it.
2507  */
2508 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2509 {
2510 	int cnt;
2511 	uint32_t *dword_ptr;
2512 	struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2513 
2514 	pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2515 
2516 	/* Setup packet address segment pointer */
2517 	dword_ptr = pkt24->u.status0.dseg_0_address;
2518 
2519 	/* Set total data segment count */
2520 	if (prm->seg_cnt)
2521 		pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2522 
2523 	if (prm->seg_cnt == 0) {
2524 		/* No data transfer */
2525 		*dword_ptr++ = 0;
2526 		*dword_ptr = 0;
2527 		return;
2528 	}
2529 
2530 	/* If scatter gather */
2531 
2532 	/* Load command entry data segments */
2533 	for (cnt = 0;
2534 	    (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2535 	    cnt++, prm->seg_cnt--) {
2536 		*dword_ptr++ =
2537 		    cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2538 
2539 		*dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2540 			sg_dma_address(prm->sg)));
2541 
2542 		*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2543 
2544 		prm->sg = sg_next(prm->sg);
2545 	}
2546 
2547 	qlt_load_cont_data_segments(prm);
2548 }
2549 
2550 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2551 {
2552 	return cmd->bufflen > 0;
2553 }
2554 
2555 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2556 {
2557 	struct qla_tgt_cmd *cmd;
2558 	struct scsi_qla_host *vha;
2559 
2560 	/* asc 0x10=dif error */
2561 	if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2562 		cmd = prm->cmd;
2563 		vha = cmd->vha;
2564 		/* ASCQ */
2565 		switch (prm->sense_buffer[13]) {
2566 		case 1:
2567 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2568 			    "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2569 			    "se_cmd=%p tag[%x]",
2570 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2571 			    cmd->atio.u.isp24.exchange_addr);
2572 			break;
2573 		case 2:
2574 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2575 			    "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2576 			    "se_cmd=%p tag[%x]",
2577 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2578 			    cmd->atio.u.isp24.exchange_addr);
2579 			break;
2580 		case 3:
2581 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2582 			    "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2583 			    "se_cmd=%p tag[%x]",
2584 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2585 			    cmd->atio.u.isp24.exchange_addr);
2586 			break;
2587 		default:
2588 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2589 			    "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2590 			    "se_cmd=%p tag[%x]",
2591 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2592 			    cmd->atio.u.isp24.exchange_addr);
2593 			break;
2594 		}
2595 		ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2596 	}
2597 }
2598 
2599 /*
2600  * Called without ha->hardware_lock held
2601  */
2602 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2603 	struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2604 	uint32_t *full_req_cnt)
2605 {
2606 	struct se_cmd *se_cmd = &cmd->se_cmd;
2607 	struct qla_qpair *qpair = cmd->qpair;
2608 
2609 	prm->cmd = cmd;
2610 	prm->tgt = cmd->tgt;
2611 	prm->pkt = NULL;
2612 	prm->rq_result = scsi_status;
2613 	prm->sense_buffer = &cmd->sense_buffer[0];
2614 	prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2615 	prm->sg = NULL;
2616 	prm->seg_cnt = -1;
2617 	prm->req_cnt = 1;
2618 	prm->residual = 0;
2619 	prm->add_status_pkt = 0;
2620 	prm->prot_sg = NULL;
2621 	prm->prot_seg_cnt = 0;
2622 	prm->tot_dsds = 0;
2623 
2624 	if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2625 		if  (qlt_pci_map_calc_cnt(prm) != 0)
2626 			return -EAGAIN;
2627 	}
2628 
2629 	*full_req_cnt = prm->req_cnt;
2630 
2631 	if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2632 		prm->residual = se_cmd->residual_count;
2633 		ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2634 		    "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2635 		       prm->residual, se_cmd->tag,
2636 		       se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2637 		       cmd->bufflen, prm->rq_result);
2638 		prm->rq_result |= SS_RESIDUAL_UNDER;
2639 	} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2640 		prm->residual = se_cmd->residual_count;
2641 		ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2642 		    "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2643 		       prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2644 		       se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2645 		prm->rq_result |= SS_RESIDUAL_OVER;
2646 	}
2647 
2648 	if (xmit_type & QLA_TGT_XMIT_STATUS) {
2649 		/*
2650 		 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2651 		 * ignored in *xmit_response() below
2652 		 */
2653 		if (qlt_has_data(cmd)) {
2654 			if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2655 			    (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2656 			    (prm->rq_result != 0))) {
2657 				prm->add_status_pkt = 1;
2658 				(*full_req_cnt)++;
2659 			}
2660 		}
2661 	}
2662 
2663 	return 0;
2664 }
2665 
2666 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2667     int sending_sense)
2668 {
2669 	if (cmd->qpair->enable_class_2)
2670 		return 0;
2671 
2672 	if (sending_sense)
2673 		return cmd->conf_compl_supported;
2674 	else
2675 		return cmd->qpair->enable_explicit_conf &&
2676                     cmd->conf_compl_supported;
2677 }
2678 
2679 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2680 	struct qla_tgt_prm *prm)
2681 {
2682 	prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2683 	    (uint32_t)sizeof(ctio->u.status1.sense_data));
2684 	ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2685 	if (qlt_need_explicit_conf(prm->cmd, 0)) {
2686 		ctio->u.status0.flags |= cpu_to_le16(
2687 		    CTIO7_FLAGS_EXPLICIT_CONFORM |
2688 		    CTIO7_FLAGS_CONFORM_REQ);
2689 	}
2690 	ctio->u.status0.residual = cpu_to_le32(prm->residual);
2691 	ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2692 	if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2693 		int i;
2694 
2695 		if (qlt_need_explicit_conf(prm->cmd, 1)) {
2696 			if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2697 				ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2698 				    "Skipping EXPLICIT_CONFORM and "
2699 				    "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2700 				    "non GOOD status\n");
2701 				goto skip_explict_conf;
2702 			}
2703 			ctio->u.status1.flags |= cpu_to_le16(
2704 			    CTIO7_FLAGS_EXPLICIT_CONFORM |
2705 			    CTIO7_FLAGS_CONFORM_REQ);
2706 		}
2707 skip_explict_conf:
2708 		ctio->u.status1.flags &=
2709 		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2710 		ctio->u.status1.flags |=
2711 		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2712 		ctio->u.status1.scsi_status |=
2713 		    cpu_to_le16(SS_SENSE_LEN_VALID);
2714 		ctio->u.status1.sense_length =
2715 		    cpu_to_le16(prm->sense_buffer_len);
2716 		for (i = 0; i < prm->sense_buffer_len/4; i++)
2717 			((uint32_t *)ctio->u.status1.sense_data)[i] =
2718 				cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2719 
2720 		qlt_print_dif_err(prm);
2721 
2722 	} else {
2723 		ctio->u.status1.flags &=
2724 		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2725 		ctio->u.status1.flags |=
2726 		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2727 		ctio->u.status1.sense_length = 0;
2728 		memset(ctio->u.status1.sense_data, 0,
2729 		    sizeof(ctio->u.status1.sense_data));
2730 	}
2731 
2732 	/* Sense with len > 24, is it possible ??? */
2733 }
2734 
2735 static inline int
2736 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2737 {
2738 	switch (se_cmd->prot_op) {
2739 	case TARGET_PROT_DOUT_INSERT:
2740 	case TARGET_PROT_DIN_STRIP:
2741 		if (ql2xenablehba_err_chk >= 1)
2742 			return 1;
2743 		break;
2744 	case TARGET_PROT_DOUT_PASS:
2745 	case TARGET_PROT_DIN_PASS:
2746 		if (ql2xenablehba_err_chk >= 2)
2747 			return 1;
2748 		break;
2749 	case TARGET_PROT_DIN_INSERT:
2750 	case TARGET_PROT_DOUT_STRIP:
2751 		return 1;
2752 	default:
2753 		break;
2754 	}
2755 	return 0;
2756 }
2757 
2758 static inline int
2759 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2760 {
2761 	switch (se_cmd->prot_op) {
2762 	case TARGET_PROT_DIN_INSERT:
2763 	case TARGET_PROT_DOUT_INSERT:
2764 	case TARGET_PROT_DIN_STRIP:
2765 	case TARGET_PROT_DOUT_STRIP:
2766 	case TARGET_PROT_DIN_PASS:
2767 	case TARGET_PROT_DOUT_PASS:
2768 	    return 1;
2769 	default:
2770 	    return 0;
2771 	}
2772 	return 0;
2773 }
2774 
2775 /*
2776  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2777  */
2778 static void
2779 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2780     uint16_t *pfw_prot_opts)
2781 {
2782 	struct se_cmd *se_cmd = &cmd->se_cmd;
2783 	uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2784 	scsi_qla_host_t *vha = cmd->tgt->vha;
2785 	struct qla_hw_data *ha = vha->hw;
2786 	uint32_t t32 = 0;
2787 
2788 	/*
2789 	 * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2790 	 * have been immplemented by TCM, before AppTag is avail.
2791 	 * Look for modesense_handlers[]
2792 	 */
2793 	ctx->app_tag = 0;
2794 	ctx->app_tag_mask[0] = 0x0;
2795 	ctx->app_tag_mask[1] = 0x0;
2796 
2797 	if (IS_PI_UNINIT_CAPABLE(ha)) {
2798 		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2799 		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2800 			*pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2801 		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2802 			*pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2803 	}
2804 
2805 	t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2806 
2807 	switch (se_cmd->prot_type) {
2808 	case TARGET_DIF_TYPE0_PROT:
2809 		/*
2810 		 * No check for ql2xenablehba_err_chk, as it
2811 		 * would be an I/O error if hba tag generation
2812 		 * is not done.
2813 		 */
2814 		ctx->ref_tag = cpu_to_le32(lba);
2815 		/* enable ALL bytes of the ref tag */
2816 		ctx->ref_tag_mask[0] = 0xff;
2817 		ctx->ref_tag_mask[1] = 0xff;
2818 		ctx->ref_tag_mask[2] = 0xff;
2819 		ctx->ref_tag_mask[3] = 0xff;
2820 		break;
2821 	case TARGET_DIF_TYPE1_PROT:
2822 	    /*
2823 	     * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2824 	     * REF tag, and 16 bit app tag.
2825 	     */
2826 	    ctx->ref_tag = cpu_to_le32(lba);
2827 	    if (!qla_tgt_ref_mask_check(se_cmd) ||
2828 		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2829 		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2830 		    break;
2831 	    }
2832 	    /* enable ALL bytes of the ref tag */
2833 	    ctx->ref_tag_mask[0] = 0xff;
2834 	    ctx->ref_tag_mask[1] = 0xff;
2835 	    ctx->ref_tag_mask[2] = 0xff;
2836 	    ctx->ref_tag_mask[3] = 0xff;
2837 	    break;
2838 	case TARGET_DIF_TYPE2_PROT:
2839 	    /*
2840 	     * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2841 	     * tag has to match LBA in CDB + N
2842 	     */
2843 	    ctx->ref_tag = cpu_to_le32(lba);
2844 	    if (!qla_tgt_ref_mask_check(se_cmd) ||
2845 		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2846 		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2847 		    break;
2848 	    }
2849 	    /* enable ALL bytes of the ref tag */
2850 	    ctx->ref_tag_mask[0] = 0xff;
2851 	    ctx->ref_tag_mask[1] = 0xff;
2852 	    ctx->ref_tag_mask[2] = 0xff;
2853 	    ctx->ref_tag_mask[3] = 0xff;
2854 	    break;
2855 	case TARGET_DIF_TYPE3_PROT:
2856 	    /* For TYPE 3 protection: 16 bit GUARD only */
2857 	    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2858 	    ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2859 		ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2860 	    break;
2861 	}
2862 }
2863 
2864 static inline int
2865 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2866 {
2867 	uint32_t		*cur_dsd;
2868 	uint32_t		transfer_length = 0;
2869 	uint32_t		data_bytes;
2870 	uint32_t		dif_bytes;
2871 	uint8_t			bundling = 1;
2872 	struct crc_context	*crc_ctx_pkt = NULL;
2873 	struct qla_hw_data	*ha;
2874 	struct ctio_crc2_to_fw	*pkt;
2875 	dma_addr_t		crc_ctx_dma;
2876 	uint16_t		fw_prot_opts = 0;
2877 	struct qla_tgt_cmd	*cmd = prm->cmd;
2878 	struct se_cmd		*se_cmd = &cmd->se_cmd;
2879 	uint32_t h;
2880 	struct atio_from_isp *atio = &prm->cmd->atio;
2881 	struct qla_tc_param	tc;
2882 	uint16_t t16;
2883 	scsi_qla_host_t *vha = cmd->vha;
2884 
2885 	ha = vha->hw;
2886 
2887 	pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2888 	prm->pkt = pkt;
2889 	memset(pkt, 0, sizeof(*pkt));
2890 
2891 	ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2892 		"qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2893 		cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2894 		prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2895 
2896 	if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2897 	    (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2898 		bundling = 0;
2899 
2900 	/* Compute dif len and adjust data len to incude protection */
2901 	data_bytes = cmd->bufflen;
2902 	dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2903 
2904 	switch (se_cmd->prot_op) {
2905 	case TARGET_PROT_DIN_INSERT:
2906 	case TARGET_PROT_DOUT_STRIP:
2907 		transfer_length = data_bytes;
2908 		if (cmd->prot_sg_cnt)
2909 			data_bytes += dif_bytes;
2910 		break;
2911 	case TARGET_PROT_DIN_STRIP:
2912 	case TARGET_PROT_DOUT_INSERT:
2913 	case TARGET_PROT_DIN_PASS:
2914 	case TARGET_PROT_DOUT_PASS:
2915 		transfer_length = data_bytes + dif_bytes;
2916 		break;
2917 	default:
2918 		BUG();
2919 		break;
2920 	}
2921 
2922 	if (!qlt_hba_err_chk_enabled(se_cmd))
2923 		fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2924 	/* HBA error checking enabled */
2925 	else if (IS_PI_UNINIT_CAPABLE(ha)) {
2926 		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2927 		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2928 			fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2929 		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2930 			fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2931 	}
2932 
2933 	switch (se_cmd->prot_op) {
2934 	case TARGET_PROT_DIN_INSERT:
2935 	case TARGET_PROT_DOUT_INSERT:
2936 		fw_prot_opts |= PO_MODE_DIF_INSERT;
2937 		break;
2938 	case TARGET_PROT_DIN_STRIP:
2939 	case TARGET_PROT_DOUT_STRIP:
2940 		fw_prot_opts |= PO_MODE_DIF_REMOVE;
2941 		break;
2942 	case TARGET_PROT_DIN_PASS:
2943 	case TARGET_PROT_DOUT_PASS:
2944 		fw_prot_opts |= PO_MODE_DIF_PASS;
2945 		/* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2946 		break;
2947 	default:/* Normal Request */
2948 		fw_prot_opts |= PO_MODE_DIF_PASS;
2949 		break;
2950 	}
2951 
2952 	/* ---- PKT ---- */
2953 	/* Update entry type to indicate Command Type CRC_2 IOCB */
2954 	pkt->entry_type  = CTIO_CRC2;
2955 	pkt->entry_count = 1;
2956 	pkt->vp_index = cmd->vp_idx;
2957 
2958 	h = qlt_make_handle(qpair);
2959 	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2960 		/*
2961 		 * CTIO type 7 from the firmware doesn't provide a way to
2962 		 * know the initiator's LOOP ID, hence we can't find
2963 		 * the session and, so, the command.
2964 		 */
2965 		return -EAGAIN;
2966 	} else
2967 		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2968 
2969 	pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
2970 	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2971 	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2972 	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2973 	pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2974 	pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2975 	pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2976 	pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2977 
2978 	/* silence compile warning */
2979 	t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2980 	pkt->ox_id  = cpu_to_le16(t16);
2981 
2982 	t16 = (atio->u.isp24.attr << 9);
2983 	pkt->flags |= cpu_to_le16(t16);
2984 	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2985 
2986 	/* Set transfer direction */
2987 	if (cmd->dma_data_direction == DMA_TO_DEVICE)
2988 		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2989 	else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2990 		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2991 
2992 	pkt->dseg_count = prm->tot_dsds;
2993 	/* Fibre channel byte count */
2994 	pkt->transfer_length = cpu_to_le32(transfer_length);
2995 
2996 	/* ----- CRC context -------- */
2997 
2998 	/* Allocate CRC context from global pool */
2999 	crc_ctx_pkt = cmd->ctx =
3000 	    dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3001 
3002 	if (!crc_ctx_pkt)
3003 		goto crc_queuing_error;
3004 
3005 	crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3006 	INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3007 
3008 	/* Set handle */
3009 	crc_ctx_pkt->handle = pkt->handle;
3010 
3011 	qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3012 
3013 	pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
3014 	pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
3015 	pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3016 
3017 	if (!bundling) {
3018 		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
3019 	} else {
3020 		/*
3021 		 * Configure Bundling if we need to fetch interlaving
3022 		 * protection PCI accesses
3023 		 */
3024 		fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3025 		crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3026 		crc_ctx_pkt->u.bundling.dseg_count =
3027 			cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3028 		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
3029 	}
3030 
3031 	/* Finish the common fields of CRC pkt */
3032 	crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3033 	crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3034 	crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3035 	crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3036 
3037 	memset((uint8_t *)&tc, 0 , sizeof(tc));
3038 	tc.vha = vha;
3039 	tc.blk_sz = cmd->blk_sz;
3040 	tc.bufflen = cmd->bufflen;
3041 	tc.sg = cmd->sg;
3042 	tc.prot_sg = cmd->prot_sg;
3043 	tc.ctx = crc_ctx_pkt;
3044 	tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3045 
3046 	/* Walks data segments */
3047 	pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3048 
3049 	if (!bundling && prm->prot_seg_cnt) {
3050 		if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3051 			prm->tot_dsds, &tc))
3052 			goto crc_queuing_error;
3053 	} else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3054 		(prm->tot_dsds - prm->prot_seg_cnt), &tc))
3055 		goto crc_queuing_error;
3056 
3057 	if (bundling && prm->prot_seg_cnt) {
3058 		/* Walks dif segments */
3059 		pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3060 
3061 		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3062 		if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3063 			prm->prot_seg_cnt, &tc))
3064 			goto crc_queuing_error;
3065 	}
3066 	return QLA_SUCCESS;
3067 
3068 crc_queuing_error:
3069 	/* Cleanup will be performed by the caller */
3070 	qpair->req->outstanding_cmds[h] = NULL;
3071 
3072 	return QLA_FUNCTION_FAILED;
3073 }
3074 
3075 /*
3076  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3077  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3078  */
3079 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3080 	uint8_t scsi_status)
3081 {
3082 	struct scsi_qla_host *vha = cmd->vha;
3083 	struct qla_qpair *qpair = cmd->qpair;
3084 	struct ctio7_to_24xx *pkt;
3085 	struct qla_tgt_prm prm;
3086 	uint32_t full_req_cnt = 0;
3087 	unsigned long flags = 0;
3088 	int res;
3089 
3090 	if (cmd->sess && cmd->sess->deleted) {
3091 		cmd->state = QLA_TGT_STATE_PROCESSED;
3092 		if (cmd->sess->logout_completed)
3093 			/* no need to terminate. FW already freed exchange. */
3094 			qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3095 		else
3096 			qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3097 		return 0;
3098 	}
3099 
3100 	ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3101 	    "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3102 	    (xmit_type & QLA_TGT_XMIT_STATUS) ?
3103 	    1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3104 	    &cmd->se_cmd, qpair->id);
3105 
3106 	res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3107 	    &full_req_cnt);
3108 	if (unlikely(res != 0)) {
3109 		return res;
3110 	}
3111 
3112 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3113 
3114 	if (xmit_type == QLA_TGT_XMIT_STATUS)
3115 		qpair->tgt_counters.core_qla_snd_status++;
3116 	else
3117 		qpair->tgt_counters.core_qla_que_buf++;
3118 
3119 	if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3120 		/*
3121 		 * Either the port is not online or this request was from
3122 		 * previous life, just abort the processing.
3123 		 */
3124 		cmd->state = QLA_TGT_STATE_PROCESSED;
3125 		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3126 		ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3127 			"RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3128 			vha->flags.online, qla2x00_reset_active(vha),
3129 			cmd->reset_count, qpair->chip_reset);
3130 		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3131 		return 0;
3132 	}
3133 
3134 	/* Does F/W have an IOCBs for this request */
3135 	res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3136 	if (unlikely(res))
3137 		goto out_unmap_unlock;
3138 
3139 	if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3140 		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3141 	else
3142 		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3143 	if (unlikely(res != 0)) {
3144 		qpair->req->cnt += full_req_cnt;
3145 		goto out_unmap_unlock;
3146 	}
3147 
3148 	pkt = (struct ctio7_to_24xx *)prm.pkt;
3149 
3150 	if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3151 		pkt->u.status0.flags |=
3152 		    cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3153 			CTIO7_FLAGS_STATUS_MODE_0);
3154 
3155 		if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3156 			qlt_load_data_segments(&prm);
3157 
3158 		if (prm.add_status_pkt == 0) {
3159 			if (xmit_type & QLA_TGT_XMIT_STATUS) {
3160 				pkt->u.status0.scsi_status =
3161 				    cpu_to_le16(prm.rq_result);
3162 				pkt->u.status0.residual =
3163 				    cpu_to_le32(prm.residual);
3164 				pkt->u.status0.flags |= cpu_to_le16(
3165 				    CTIO7_FLAGS_SEND_STATUS);
3166 				if (qlt_need_explicit_conf(cmd, 0)) {
3167 					pkt->u.status0.flags |=
3168 					    cpu_to_le16(
3169 						CTIO7_FLAGS_EXPLICIT_CONFORM |
3170 						CTIO7_FLAGS_CONFORM_REQ);
3171 				}
3172 			}
3173 
3174 		} else {
3175 			/*
3176 			 * We have already made sure that there is sufficient
3177 			 * amount of request entries to not drop HW lock in
3178 			 * req_pkt().
3179 			 */
3180 			struct ctio7_to_24xx *ctio =
3181 				(struct ctio7_to_24xx *)qlt_get_req_pkt(
3182 				    qpair->req);
3183 
3184 			ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3185 			    "Building additional status packet 0x%p.\n",
3186 			    ctio);
3187 
3188 			/*
3189 			 * T10Dif: ctio_crc2_to_fw overlay ontop of
3190 			 * ctio7_to_24xx
3191 			 */
3192 			memcpy(ctio, pkt, sizeof(*ctio));
3193 			/* reset back to CTIO7 */
3194 			ctio->entry_count = 1;
3195 			ctio->entry_type = CTIO_TYPE7;
3196 			ctio->dseg_count = 0;
3197 			ctio->u.status1.flags &= ~cpu_to_le16(
3198 			    CTIO7_FLAGS_DATA_IN);
3199 
3200 			/* Real finish is ctio_m1's finish */
3201 			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3202 			pkt->u.status0.flags |= cpu_to_le16(
3203 			    CTIO7_FLAGS_DONT_RET_CTIO);
3204 
3205 			/* qlt_24xx_init_ctio_to_isp will correct
3206 			 * all neccessary fields that's part of CTIO7.
3207 			 * There should be no residual of CTIO-CRC2 data.
3208 			 */
3209 			qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3210 			    &prm);
3211 		}
3212 	} else
3213 		qlt_24xx_init_ctio_to_isp(pkt, &prm);
3214 
3215 
3216 	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3217 	cmd->cmd_sent_to_fw = 1;
3218 
3219 	/* Memory Barrier */
3220 	wmb();
3221 	if (qpair->reqq_start_iocbs)
3222 		qpair->reqq_start_iocbs(qpair);
3223 	else
3224 		qla2x00_start_iocbs(vha, qpair->req);
3225 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3226 
3227 	return 0;
3228 
3229 out_unmap_unlock:
3230 	qlt_unmap_sg(vha, cmd);
3231 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3232 
3233 	return res;
3234 }
3235 EXPORT_SYMBOL(qlt_xmit_response);
3236 
3237 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3238 {
3239 	struct ctio7_to_24xx *pkt;
3240 	struct scsi_qla_host *vha = cmd->vha;
3241 	struct qla_tgt *tgt = cmd->tgt;
3242 	struct qla_tgt_prm prm;
3243 	unsigned long flags = 0;
3244 	int res = 0;
3245 	struct qla_qpair *qpair = cmd->qpair;
3246 
3247 	memset(&prm, 0, sizeof(prm));
3248 	prm.cmd = cmd;
3249 	prm.tgt = tgt;
3250 	prm.sg = NULL;
3251 	prm.req_cnt = 1;
3252 
3253 	/* Calculate number of entries and segments required */
3254 	if (qlt_pci_map_calc_cnt(&prm) != 0)
3255 		return -EAGAIN;
3256 
3257 	if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3258 	    (cmd->sess && cmd->sess->deleted)) {
3259 		/*
3260 		 * Either the port is not online or this request was from
3261 		 * previous life, just abort the processing.
3262 		 */
3263 		cmd->state = QLA_TGT_STATE_NEED_DATA;
3264 		qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3265 		ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3266 			"RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3267 			vha->flags.online, qla2x00_reset_active(vha),
3268 			cmd->reset_count, qpair->chip_reset);
3269 		return 0;
3270 	}
3271 
3272 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3273 	/* Does F/W have an IOCBs for this request */
3274 	res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3275 	if (res != 0)
3276 		goto out_unlock_free_unmap;
3277 	if (cmd->se_cmd.prot_op)
3278 		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3279 	else
3280 		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3281 
3282 	if (unlikely(res != 0)) {
3283 		qpair->req->cnt += prm.req_cnt;
3284 		goto out_unlock_free_unmap;
3285 	}
3286 
3287 	pkt = (struct ctio7_to_24xx *)prm.pkt;
3288 	pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3289 	    CTIO7_FLAGS_STATUS_MODE_0);
3290 
3291 	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3292 		qlt_load_data_segments(&prm);
3293 
3294 	cmd->state = QLA_TGT_STATE_NEED_DATA;
3295 	cmd->cmd_sent_to_fw = 1;
3296 
3297 	/* Memory Barrier */
3298 	wmb();
3299 	if (qpair->reqq_start_iocbs)
3300 		qpair->reqq_start_iocbs(qpair);
3301 	else
3302 		qla2x00_start_iocbs(vha, qpair->req);
3303 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3304 
3305 	return res;
3306 
3307 out_unlock_free_unmap:
3308 	qlt_unmap_sg(vha, cmd);
3309 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3310 
3311 	return res;
3312 }
3313 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3314 
3315 
3316 /*
3317  * it is assumed either hardware_lock or qpair lock is held.
3318  */
3319 static void
3320 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3321 	struct ctio_crc_from_fw *sts)
3322 {
3323 	uint8_t		*ap = &sts->actual_dif[0];
3324 	uint8_t		*ep = &sts->expected_dif[0];
3325 	uint64_t	lba = cmd->se_cmd.t_task_lba;
3326 	uint8_t scsi_status, sense_key, asc, ascq;
3327 	unsigned long flags;
3328 	struct scsi_qla_host *vha = cmd->vha;
3329 
3330 	cmd->trc_flags |= TRC_DIF_ERR;
3331 
3332 	cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3333 	cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3334 	cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3335 
3336 	cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3337 	cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3338 	cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3339 
3340 	ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3341 	    "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3342 
3343 	scsi_status = sense_key = asc = ascq = 0;
3344 
3345 	/* check appl tag */
3346 	if (cmd->e_app_tag != cmd->a_app_tag) {
3347 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3348 		    "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]",
3349 		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3350 		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3351 		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3352 		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3353 
3354 		cmd->dif_err_code = DIF_ERR_APP;
3355 		scsi_status = SAM_STAT_CHECK_CONDITION;
3356 		sense_key = ABORTED_COMMAND;
3357 		asc = 0x10;
3358 		ascq = 0x2;
3359 	}
3360 
3361 	/* check ref tag */
3362 	if (cmd->e_ref_tag != cmd->a_ref_tag) {
3363 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3364 		    "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] ",
3365 		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3366 		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3367 		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3368 		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3369 
3370 		cmd->dif_err_code = DIF_ERR_REF;
3371 		scsi_status = SAM_STAT_CHECK_CONDITION;
3372 		sense_key = ABORTED_COMMAND;
3373 		asc = 0x10;
3374 		ascq = 0x3;
3375 		goto out;
3376 	}
3377 
3378 	/* check guard */
3379 	if (cmd->e_guard != cmd->a_guard) {
3380 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3381 		    "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]",
3382 		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3383 		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3384 		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3385 		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3386 
3387 		cmd->dif_err_code = DIF_ERR_GRD;
3388 		scsi_status = SAM_STAT_CHECK_CONDITION;
3389 		sense_key = ABORTED_COMMAND;
3390 		asc = 0x10;
3391 		ascq = 0x1;
3392 	}
3393 out:
3394 	switch (cmd->state) {
3395 	case QLA_TGT_STATE_NEED_DATA:
3396 		/* handle_data will load DIF error code  */
3397 		cmd->state = QLA_TGT_STATE_DATA_IN;
3398 		vha->hw->tgt.tgt_ops->handle_data(cmd);
3399 		break;
3400 	default:
3401 		spin_lock_irqsave(&cmd->cmd_lock, flags);
3402 		if (cmd->aborted) {
3403 			spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3404 			vha->hw->tgt.tgt_ops->free_cmd(cmd);
3405 			break;
3406 		}
3407 		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3408 
3409 		qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3410 		    ascq);
3411 		/* assume scsi status gets out on the wire.
3412 		 * Will not wait for completion.
3413 		 */
3414 		vha->hw->tgt.tgt_ops->free_cmd(cmd);
3415 		break;
3416 	}
3417 }
3418 
3419 /* If hardware_lock held on entry, might drop it, then reaquire */
3420 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3421 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3422 	struct imm_ntfy_from_isp *ntfy)
3423 {
3424 	struct nack_to_isp *nack;
3425 	struct qla_hw_data *ha = vha->hw;
3426 	request_t *pkt;
3427 	int ret = 0;
3428 
3429 	ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3430 	    "Sending TERM ELS CTIO (ha=%p)\n", ha);
3431 
3432 	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3433 	if (pkt == NULL) {
3434 		ql_dbg(ql_dbg_tgt, vha, 0xe080,
3435 		    "qla_target(%d): %s failed: unable to allocate "
3436 		    "request packet\n", vha->vp_idx, __func__);
3437 		return -ENOMEM;
3438 	}
3439 
3440 	pkt->entry_type = NOTIFY_ACK_TYPE;
3441 	pkt->entry_count = 1;
3442 	pkt->handle = QLA_TGT_SKIP_HANDLE;
3443 
3444 	nack = (struct nack_to_isp *)pkt;
3445 	nack->ox_id = ntfy->ox_id;
3446 
3447 	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3448 	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3449 		nack->u.isp24.flags = ntfy->u.isp24.flags &
3450 			__constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3451 	}
3452 
3453 	/* terminate */
3454 	nack->u.isp24.flags |=
3455 		__constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3456 
3457 	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3458 	nack->u.isp24.status = ntfy->u.isp24.status;
3459 	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3460 	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3461 	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3462 	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3463 	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3464 	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3465 
3466 	qla2x00_start_iocbs(vha, vha->req);
3467 	return ret;
3468 }
3469 
3470 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3471 	struct imm_ntfy_from_isp *imm, int ha_locked)
3472 {
3473 	unsigned long flags = 0;
3474 	int rc;
3475 
3476 	if (ha_locked) {
3477 		rc = __qlt_send_term_imm_notif(vha, imm);
3478 
3479 #if 0	/* Todo  */
3480 		if (rc == -ENOMEM)
3481 			qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3482 #else
3483 		if (rc) {
3484 		}
3485 #endif
3486 		goto done;
3487 	}
3488 
3489 	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3490 	rc = __qlt_send_term_imm_notif(vha, imm);
3491 
3492 #if 0	/* Todo */
3493 	if (rc == -ENOMEM)
3494 		qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3495 #endif
3496 
3497 done:
3498 	if (!ha_locked)
3499 		spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3500 }
3501 
3502 /*
3503  * If hardware_lock held on entry, might drop it, then reaquire
3504  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3505  */
3506 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3507 	struct qla_tgt_cmd *cmd,
3508 	struct atio_from_isp *atio)
3509 {
3510 	struct scsi_qla_host *vha = qpair->vha;
3511 	struct ctio7_to_24xx *ctio24;
3512 	struct qla_hw_data *ha = vha->hw;
3513 	request_t *pkt;
3514 	int ret = 0;
3515 	uint16_t temp;
3516 
3517 	ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3518 
3519 	if (cmd)
3520 		vha = cmd->vha;
3521 
3522 	pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3523 	if (pkt == NULL) {
3524 		ql_dbg(ql_dbg_tgt, vha, 0xe050,
3525 		    "qla_target(%d): %s failed: unable to allocate "
3526 		    "request packet\n", vha->vp_idx, __func__);
3527 		return -ENOMEM;
3528 	}
3529 
3530 	if (cmd != NULL) {
3531 		if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3532 			ql_dbg(ql_dbg_tgt, vha, 0xe051,
3533 			    "qla_target(%d): Terminating cmd %p with "
3534 			    "incorrect state %d\n", vha->vp_idx, cmd,
3535 			    cmd->state);
3536 		} else
3537 			ret = 1;
3538 	}
3539 
3540 	qpair->tgt_counters.num_term_xchg_sent++;
3541 	pkt->entry_count = 1;
3542 	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3543 
3544 	ctio24 = (struct ctio7_to_24xx *)pkt;
3545 	ctio24->entry_type = CTIO_TYPE7;
3546 	ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3547 	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3548 	ctio24->vp_index = vha->vp_idx;
3549 	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3550 	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3551 	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3552 	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3553 	temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3554 		CTIO7_FLAGS_TERMINATE;
3555 	ctio24->u.status1.flags = cpu_to_le16(temp);
3556 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3557 	ctio24->u.status1.ox_id = cpu_to_le16(temp);
3558 
3559 	/* Most likely, it isn't needed */
3560 	ctio24->u.status1.residual = get_unaligned((uint32_t *)
3561 	    &atio->u.isp24.fcp_cmnd.add_cdb[
3562 	    atio->u.isp24.fcp_cmnd.add_cdb_len]);
3563 	if (ctio24->u.status1.residual != 0)
3564 		ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3565 
3566 	/* Memory Barrier */
3567 	wmb();
3568 	if (qpair->reqq_start_iocbs)
3569 		qpair->reqq_start_iocbs(qpair);
3570 	else
3571 		qla2x00_start_iocbs(vha, qpair->req);
3572 	return ret;
3573 }
3574 
3575 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3576 	struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3577 	int ul_abort)
3578 {
3579 	struct scsi_qla_host *vha;
3580 	unsigned long flags = 0;
3581 	int rc;
3582 
3583 	/* why use different vha? NPIV */
3584 	if (cmd)
3585 		vha = cmd->vha;
3586 	else
3587 		vha = qpair->vha;
3588 
3589 	if (ha_locked) {
3590 		rc = __qlt_send_term_exchange(qpair, cmd, atio);
3591 		if (rc == -ENOMEM)
3592 			qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3593 		goto done;
3594 	}
3595 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3596 	rc = __qlt_send_term_exchange(qpair, cmd, atio);
3597 	if (rc == -ENOMEM)
3598 		qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3599 
3600 done:
3601 	if (cmd && !ul_abort && !cmd->aborted) {
3602 		if (cmd->sg_mapped)
3603 			qlt_unmap_sg(vha, cmd);
3604 		vha->hw->tgt.tgt_ops->free_cmd(cmd);
3605 	}
3606 
3607 	if (!ha_locked)
3608 		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3609 
3610 	return;
3611 }
3612 
3613 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3614 {
3615 	struct list_head free_list;
3616 	struct qla_tgt_cmd *cmd, *tcmd;
3617 
3618 	vha->hw->tgt.leak_exchg_thresh_hold =
3619 	    (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3620 
3621 	cmd = tcmd = NULL;
3622 	if (!list_empty(&vha->hw->tgt.q_full_list)) {
3623 		INIT_LIST_HEAD(&free_list);
3624 		list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3625 
3626 		list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3627 			list_del(&cmd->cmd_list);
3628 			/* This cmd was never sent to TCM.  There is no need
3629 			 * to schedule free or call free_cmd
3630 			 */
3631 			qlt_free_cmd(cmd);
3632 			vha->hw->tgt.num_qfull_cmds_alloc--;
3633 		}
3634 	}
3635 	vha->hw->tgt.num_qfull_cmds_dropped = 0;
3636 }
3637 
3638 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3639 {
3640 	uint32_t total_leaked;
3641 
3642 	total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3643 
3644 	if (vha->hw->tgt.leak_exchg_thresh_hold &&
3645 	    (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3646 
3647 		ql_dbg(ql_dbg_tgt, vha, 0xe079,
3648 		    "Chip reset due to exchange starvation: %d/%d.\n",
3649 		    total_leaked, vha->hw->cur_fw_xcb_count);
3650 
3651 		if (IS_P3P_TYPE(vha->hw))
3652 			set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3653 		else
3654 			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3655 		qla2xxx_wake_dpc(vha);
3656 	}
3657 
3658 }
3659 
3660 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3661 {
3662 	struct qla_tgt *tgt = cmd->tgt;
3663 	struct scsi_qla_host *vha = tgt->vha;
3664 	struct se_cmd *se_cmd = &cmd->se_cmd;
3665 	unsigned long flags;
3666 
3667 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3668 	    "qla_target(%d): terminating exchange for aborted cmd=%p "
3669 	    "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3670 	    se_cmd->tag);
3671 
3672 	spin_lock_irqsave(&cmd->cmd_lock, flags);
3673 	if (cmd->aborted) {
3674 		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3675 		/*
3676 		 * It's normal to see 2 calls in this path:
3677 		 *  1) XFER Rdy completion + CMD_T_ABORT
3678 		 *  2) TCM TMR - drain_state_list
3679 		 */
3680 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3681 		    "multiple abort. %p transport_state %x, t_state %x, "
3682 		    "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3683 		    cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3684 		return EIO;
3685 	}
3686 	cmd->aborted = 1;
3687 	cmd->trc_flags |= TRC_ABORT;
3688 	spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3689 
3690 	qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3691 	return 0;
3692 }
3693 EXPORT_SYMBOL(qlt_abort_cmd);
3694 
3695 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3696 {
3697 	struct fc_port *sess = cmd->sess;
3698 
3699 	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3700 	    "%s: se_cmd[%p] ox_id %04x\n",
3701 	    __func__, &cmd->se_cmd,
3702 	    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3703 
3704 	BUG_ON(cmd->cmd_in_wq);
3705 
3706 	if (cmd->sg_mapped)
3707 		qlt_unmap_sg(cmd->vha, cmd);
3708 
3709 	if (!cmd->q_full)
3710 		qlt_decr_num_pend_cmds(cmd->vha);
3711 
3712 	BUG_ON(cmd->sg_mapped);
3713 	cmd->jiffies_at_free = get_jiffies_64();
3714 	if (unlikely(cmd->free_sg))
3715 		kfree(cmd->sg);
3716 
3717 	if (!sess || !sess->se_sess) {
3718 		WARN_ON(1);
3719 		return;
3720 	}
3721 	cmd->jiffies_at_free = get_jiffies_64();
3722 	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3723 }
3724 EXPORT_SYMBOL(qlt_free_cmd);
3725 
3726 /*
3727  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3728  */
3729 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3730 	struct qla_tgt_cmd *cmd, uint32_t status)
3731 {
3732 	int term = 0;
3733 	struct scsi_qla_host *vha = qpair->vha;
3734 
3735 	if (cmd->se_cmd.prot_op)
3736 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3737 		    "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3738 		    "se_cmd=%p tag[%x] op %#x/%s",
3739 		     cmd->lba, cmd->lba,
3740 		     cmd->num_blks, &cmd->se_cmd,
3741 		     cmd->atio.u.isp24.exchange_addr,
3742 		     cmd->se_cmd.prot_op,
3743 		     prot_op_str(cmd->se_cmd.prot_op));
3744 
3745 	if (ctio != NULL) {
3746 		struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3747 		term = !(c->flags &
3748 		    cpu_to_le16(OF_TERM_EXCH));
3749 	} else
3750 		term = 1;
3751 
3752 	if (term)
3753 		qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3754 
3755 	return term;
3756 }
3757 
3758 
3759 /* ha->hardware_lock supposed to be held on entry */
3760 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3761 	struct rsp_que *rsp, uint32_t handle, void *ctio)
3762 {
3763 	struct qla_tgt_cmd *cmd = NULL;
3764 	struct req_que *req;
3765 	int qid = GET_QID(handle);
3766 	uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3767 
3768 	if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3769 		return NULL;
3770 
3771 	if (qid == rsp->req->id) {
3772 		req = rsp->req;
3773 	} else if (vha->hw->req_q_map[qid]) {
3774 		ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3775 		    "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3776 		    vha->vp_idx, rsp->id, handle);
3777 		req = vha->hw->req_q_map[qid];
3778 	} else {
3779 		return NULL;
3780 	}
3781 
3782 	h &= QLA_CMD_HANDLE_MASK;
3783 
3784 	if (h != QLA_TGT_NULL_HANDLE) {
3785 		if (unlikely(h >= req->num_outstanding_cmds)) {
3786 			ql_dbg(ql_dbg_tgt, vha, 0xe052,
3787 			    "qla_target(%d): Wrong handle %x received\n",
3788 			    vha->vp_idx, handle);
3789 			return NULL;
3790 		}
3791 
3792 		cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3793 		if (unlikely(cmd == NULL)) {
3794 			ql_dbg(ql_dbg_async, vha, 0xe053,
3795 			    "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3796 				vha->vp_idx, handle, req->id, rsp->id);
3797 			return NULL;
3798 		}
3799 		req->outstanding_cmds[h] = NULL;
3800 	} else if (ctio != NULL) {
3801 		/* We can't get loop ID from CTIO7 */
3802 		ql_dbg(ql_dbg_tgt, vha, 0xe054,
3803 		    "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3804 		    "support NULL handles\n", vha->vp_idx);
3805 		return NULL;
3806 	}
3807 
3808 	return cmd;
3809 }
3810 
3811 /* hardware_lock should be held by caller. */
3812 void
3813 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3814 {
3815 	struct qla_hw_data *ha = vha->hw;
3816 
3817 	if (cmd->sg_mapped)
3818 		qlt_unmap_sg(vha, cmd);
3819 
3820 	/* TODO: fix debug message type and ids. */
3821 	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3822 		ql_dbg(ql_dbg_io, vha, 0xff00,
3823 		    "HOST-ABORT: state=PROCESSED.\n");
3824 	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3825 		cmd->write_data_transferred = 0;
3826 		cmd->state = QLA_TGT_STATE_DATA_IN;
3827 
3828 		ql_dbg(ql_dbg_io, vha, 0xff01,
3829 		    "HOST-ABORT: state=DATA_IN.\n");
3830 
3831 		ha->tgt.tgt_ops->handle_data(cmd);
3832 		return;
3833 	} else {
3834 		ql_dbg(ql_dbg_io, vha, 0xff03,
3835 		    "HOST-ABORT: state=BAD(%d).\n",
3836 		    cmd->state);
3837 		dump_stack();
3838 	}
3839 
3840 	cmd->trc_flags |= TRC_FLUSH;
3841 	ha->tgt.tgt_ops->free_cmd(cmd);
3842 }
3843 
3844 /*
3845  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3846  */
3847 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3848     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3849 {
3850 	struct qla_hw_data *ha = vha->hw;
3851 	struct se_cmd *se_cmd;
3852 	struct qla_tgt_cmd *cmd;
3853 	struct qla_qpair *qpair = rsp->qpair;
3854 
3855 	if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3856 		/* That could happen only in case of an error/reset/abort */
3857 		if (status != CTIO_SUCCESS) {
3858 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3859 			    "Intermediate CTIO received"
3860 			    " (status %x)\n", status);
3861 		}
3862 		return;
3863 	}
3864 
3865 	cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3866 	if (cmd == NULL)
3867 		return;
3868 
3869 	se_cmd = &cmd->se_cmd;
3870 	cmd->cmd_sent_to_fw = 0;
3871 
3872 	qlt_unmap_sg(vha, cmd);
3873 
3874 	if (unlikely(status != CTIO_SUCCESS)) {
3875 		switch (status & 0xFFFF) {
3876 		case CTIO_LIP_RESET:
3877 		case CTIO_TARGET_RESET:
3878 		case CTIO_ABORTED:
3879 			/* driver request abort via Terminate exchange */
3880 		case CTIO_TIMEOUT:
3881 		case CTIO_INVALID_RX_ID:
3882 			/* They are OK */
3883 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3884 			    "qla_target(%d): CTIO with "
3885 			    "status %#x received, state %x, se_cmd %p, "
3886 			    "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3887 			    "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3888 			    status, cmd->state, se_cmd);
3889 			break;
3890 
3891 		case CTIO_PORT_LOGGED_OUT:
3892 		case CTIO_PORT_UNAVAILABLE:
3893 		{
3894 			int logged_out =
3895 				(status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3896 
3897 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3898 			    "qla_target(%d): CTIO with %s status %x "
3899 			    "received (state %x, se_cmd %p)\n", vha->vp_idx,
3900 			    logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3901 			    status, cmd->state, se_cmd);
3902 
3903 			if (logged_out && cmd->sess) {
3904 				/*
3905 				 * Session is already logged out, but we need
3906 				 * to notify initiator, who's not aware of this
3907 				 */
3908 				cmd->sess->logout_on_delete = 0;
3909 				cmd->sess->send_els_logo = 1;
3910 				ql_dbg(ql_dbg_disc, vha, 0x20f8,
3911 				    "%s %d %8phC post del sess\n",
3912 				    __func__, __LINE__, cmd->sess->port_name);
3913 
3914 				qlt_schedule_sess_for_deletion(cmd->sess);
3915 			}
3916 			break;
3917 		}
3918 		case CTIO_DIF_ERROR: {
3919 			struct ctio_crc_from_fw *crc =
3920 				(struct ctio_crc_from_fw *)ctio;
3921 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3922 			    "qla_target(%d): CTIO with DIF_ERROR status %x "
3923 			    "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3924 			    "expect_dif[0x%llx]\n",
3925 			    vha->vp_idx, status, cmd->state, se_cmd,
3926 			    *((u64 *)&crc->actual_dif[0]),
3927 			    *((u64 *)&crc->expected_dif[0]));
3928 
3929 			qlt_handle_dif_error(qpair, cmd, ctio);
3930 			return;
3931 		}
3932 		default:
3933 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3934 			    "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3935 			    vha->vp_idx, status, cmd->state, se_cmd);
3936 			break;
3937 		}
3938 
3939 
3940 		/* "cmd->aborted" means
3941 		 * cmd is already aborted/terminated, we don't
3942 		 * need to terminate again.  The exchange is already
3943 		 * cleaned up/freed at FW level.  Just cleanup at driver
3944 		 * level.
3945 		 */
3946 		if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3947 		    (!cmd->aborted)) {
3948 			cmd->trc_flags |= TRC_CTIO_ERR;
3949 			if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
3950 				return;
3951 		}
3952 	}
3953 
3954 	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3955 		cmd->trc_flags |= TRC_CTIO_DONE;
3956 	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3957 		cmd->state = QLA_TGT_STATE_DATA_IN;
3958 
3959 		if (status == CTIO_SUCCESS)
3960 			cmd->write_data_transferred = 1;
3961 
3962 		ha->tgt.tgt_ops->handle_data(cmd);
3963 		return;
3964 	} else if (cmd->aborted) {
3965 		cmd->trc_flags |= TRC_CTIO_ABORTED;
3966 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3967 		  "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3968 	} else {
3969 		cmd->trc_flags |= TRC_CTIO_STRANGE;
3970 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3971 		    "qla_target(%d): A command in state (%d) should "
3972 		    "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3973 	}
3974 
3975 	if (unlikely(status != CTIO_SUCCESS) &&
3976 		!cmd->aborted) {
3977 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3978 		dump_stack();
3979 	}
3980 
3981 	ha->tgt.tgt_ops->free_cmd(cmd);
3982 }
3983 
3984 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3985 	uint8_t task_codes)
3986 {
3987 	int fcp_task_attr;
3988 
3989 	switch (task_codes) {
3990 	case ATIO_SIMPLE_QUEUE:
3991 		fcp_task_attr = TCM_SIMPLE_TAG;
3992 		break;
3993 	case ATIO_HEAD_OF_QUEUE:
3994 		fcp_task_attr = TCM_HEAD_TAG;
3995 		break;
3996 	case ATIO_ORDERED_QUEUE:
3997 		fcp_task_attr = TCM_ORDERED_TAG;
3998 		break;
3999 	case ATIO_ACA_QUEUE:
4000 		fcp_task_attr = TCM_ACA_TAG;
4001 		break;
4002 	case ATIO_UNTAGGED:
4003 		fcp_task_attr = TCM_SIMPLE_TAG;
4004 		break;
4005 	default:
4006 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4007 		    "qla_target: unknown task code %x, use ORDERED instead\n",
4008 		    task_codes);
4009 		fcp_task_attr = TCM_ORDERED_TAG;
4010 		break;
4011 	}
4012 
4013 	return fcp_task_attr;
4014 }
4015 
4016 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4017 					uint8_t *);
4018 /*
4019  * Process context for I/O path into tcm_qla2xxx code
4020  */
4021 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4022 {
4023 	scsi_qla_host_t *vha = cmd->vha;
4024 	struct qla_hw_data *ha = vha->hw;
4025 	struct fc_port *sess = cmd->sess;
4026 	struct atio_from_isp *atio = &cmd->atio;
4027 	unsigned char *cdb;
4028 	unsigned long flags;
4029 	uint32_t data_length;
4030 	int ret, fcp_task_attr, data_dir, bidi = 0;
4031 	struct qla_qpair *qpair = cmd->qpair;
4032 
4033 	cmd->cmd_in_wq = 0;
4034 	cmd->trc_flags |= TRC_DO_WORK;
4035 
4036 	if (cmd->aborted) {
4037 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4038 		    "cmd with tag %u is aborted\n",
4039 		    cmd->atio.u.isp24.exchange_addr);
4040 		goto out_term;
4041 	}
4042 
4043 	spin_lock_init(&cmd->cmd_lock);
4044 	cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4045 	cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4046 
4047 	if (atio->u.isp24.fcp_cmnd.rddata &&
4048 	    atio->u.isp24.fcp_cmnd.wrdata) {
4049 		bidi = 1;
4050 		data_dir = DMA_TO_DEVICE;
4051 	} else if (atio->u.isp24.fcp_cmnd.rddata)
4052 		data_dir = DMA_FROM_DEVICE;
4053 	else if (atio->u.isp24.fcp_cmnd.wrdata)
4054 		data_dir = DMA_TO_DEVICE;
4055 	else
4056 		data_dir = DMA_NONE;
4057 
4058 	fcp_task_attr = qlt_get_fcp_task_attr(vha,
4059 	    atio->u.isp24.fcp_cmnd.task_attr);
4060 	data_length = be32_to_cpu(get_unaligned((uint32_t *)
4061 	    &atio->u.isp24.fcp_cmnd.add_cdb[
4062 	    atio->u.isp24.fcp_cmnd.add_cdb_len]));
4063 
4064 	ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4065 				          fcp_task_attr, data_dir, bidi);
4066 	if (ret != 0)
4067 		goto out_term;
4068 	/*
4069 	 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4070 	 */
4071 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4072 	ha->tgt.tgt_ops->put_sess(sess);
4073 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4074 	return;
4075 
4076 out_term:
4077 	ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4078 	/*
4079 	 * cmd has not sent to target yet, so pass NULL as the second
4080 	 * argument to qlt_send_term_exchange() and free the memory here.
4081 	 */
4082 	cmd->trc_flags |= TRC_DO_WORK_ERR;
4083 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4084 	qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4085 
4086 	qlt_decr_num_pend_cmds(vha);
4087 	percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4088 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4089 
4090 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4091 	ha->tgt.tgt_ops->put_sess(sess);
4092 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4093 }
4094 
4095 static void qlt_do_work(struct work_struct *work)
4096 {
4097 	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4098 	scsi_qla_host_t *vha = cmd->vha;
4099 	unsigned long flags;
4100 
4101 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4102 	list_del(&cmd->cmd_list);
4103 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4104 
4105 	__qlt_do_work(cmd);
4106 }
4107 
4108 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4109 {
4110 	unsigned long flags;
4111 	struct qla_hw_data *ha = vha->hw;
4112 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4113 	void *node;
4114 	u64 key = 0;
4115 
4116 	ql_log(ql_log_info, vha, 0x706c,
4117 	    "User update Number of Active Qpairs %d\n",
4118 	    ha->tgt.num_act_qpairs);
4119 
4120 	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4121 
4122 	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4123 		btree_remove64(&tgt->lun_qpair_map, key);
4124 
4125 	ha->base_qpair->lun_cnt = 0;
4126 	for (key = 0; key < ha->max_qpairs; key++)
4127 		if (ha->queue_pair_map[key])
4128 			ha->queue_pair_map[key]->lun_cnt = 0;
4129 
4130 	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4131 }
4132 
4133 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4134 	struct qla_tgt_cmd *cmd)
4135 {
4136 	struct qla_qpair *qpair, *qp;
4137 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4138 	struct qla_qpair_hint *h;
4139 
4140 	if (vha->flags.qpairs_available) {
4141 		h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4142 		if (unlikely(!h)) {
4143 			/* spread lun to qpair ratio evently */
4144 			int lcnt = 0, rc;
4145 			struct scsi_qla_host *base_vha =
4146 				pci_get_drvdata(vha->hw->pdev);
4147 
4148 			qpair = vha->hw->base_qpair;
4149 			if (qpair->lun_cnt == 0) {
4150 				qpair->lun_cnt++;
4151 				h = qla_qpair_to_hint(tgt, qpair);
4152 				BUG_ON(!h);
4153 				rc = btree_insert64(&tgt->lun_qpair_map,
4154 					cmd->unpacked_lun, h, GFP_ATOMIC);
4155 				if (rc) {
4156 					qpair->lun_cnt--;
4157 					ql_log(ql_log_info, vha, 0xd037,
4158 					    "Unable to insert lun %llx into lun_qpair_map\n",
4159 					    cmd->unpacked_lun);
4160 				}
4161 				goto out;
4162 			} else {
4163 				lcnt = qpair->lun_cnt;
4164 			}
4165 
4166 			h = NULL;
4167 			list_for_each_entry(qp, &base_vha->qp_list,
4168 			    qp_list_elem) {
4169 				if (qp->lun_cnt == 0) {
4170 					qp->lun_cnt++;
4171 					h = qla_qpair_to_hint(tgt, qp);
4172 					BUG_ON(!h);
4173 					rc = btree_insert64(&tgt->lun_qpair_map,
4174 					    cmd->unpacked_lun, h, GFP_ATOMIC);
4175 					if (rc) {
4176 						qp->lun_cnt--;
4177 						ql_log(ql_log_info, vha, 0xd038,
4178 							"Unable to insert lun %llx into lun_qpair_map\n",
4179 							cmd->unpacked_lun);
4180 					}
4181 					qpair = qp;
4182 					goto out;
4183 				} else {
4184 					if (qp->lun_cnt < lcnt) {
4185 						lcnt = qp->lun_cnt;
4186 						qpair = qp;
4187 						continue;
4188 					}
4189 				}
4190 			}
4191 			BUG_ON(!qpair);
4192 			qpair->lun_cnt++;
4193 			h = qla_qpair_to_hint(tgt, qpair);
4194 			BUG_ON(!h);
4195 			rc = btree_insert64(&tgt->lun_qpair_map,
4196 				cmd->unpacked_lun, h, GFP_ATOMIC);
4197 			if (rc) {
4198 				qpair->lun_cnt--;
4199 				ql_log(ql_log_info, vha, 0xd039,
4200 				   "Unable to insert lun %llx into lun_qpair_map\n",
4201 				   cmd->unpacked_lun);
4202 			}
4203 		}
4204 	} else {
4205 		h = &tgt->qphints[0];
4206 	}
4207 out:
4208 	cmd->qpair = h->qpair;
4209 	cmd->se_cmd.cpuid = h->cpuid;
4210 }
4211 
4212 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4213 				       struct fc_port *sess,
4214 				       struct atio_from_isp *atio)
4215 {
4216 	struct se_session *se_sess = sess->se_sess;
4217 	struct qla_tgt_cmd *cmd;
4218 	int tag;
4219 
4220 	tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4221 	if (tag < 0)
4222 		return NULL;
4223 
4224 	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4225 	memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4226 	cmd->cmd_type = TYPE_TGT_CMD;
4227 	memcpy(&cmd->atio, atio, sizeof(*atio));
4228 	cmd->state = QLA_TGT_STATE_NEW;
4229 	cmd->tgt = vha->vha_tgt.qla_tgt;
4230 	qlt_incr_num_pend_cmds(vha);
4231 	cmd->vha = vha;
4232 	cmd->se_cmd.map_tag = tag;
4233 	cmd->sess = sess;
4234 	cmd->loop_id = sess->loop_id;
4235 	cmd->conf_compl_supported = sess->conf_compl_supported;
4236 
4237 	cmd->trc_flags = 0;
4238 	cmd->jiffies_at_alloc = get_jiffies_64();
4239 
4240 	cmd->unpacked_lun = scsilun_to_int(
4241 	    (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4242 	qlt_assign_qpair(vha, cmd);
4243 	cmd->reset_count = vha->hw->base_qpair->chip_reset;
4244 	cmd->vp_idx = vha->vp_idx;
4245 
4246 	return cmd;
4247 }
4248 
4249 /* ha->hardware_lock supposed to be held on entry */
4250 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4251 	struct atio_from_isp *atio)
4252 {
4253 	struct qla_hw_data *ha = vha->hw;
4254 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4255 	struct fc_port *sess;
4256 	struct qla_tgt_cmd *cmd;
4257 	unsigned long flags;
4258 	port_id_t id;
4259 
4260 	if (unlikely(tgt->tgt_stop)) {
4261 		ql_dbg(ql_dbg_io, vha, 0x3061,
4262 		    "New command while device %p is shutting down\n", tgt);
4263 		return -ENODEV;
4264 	}
4265 
4266 	id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
4267 	id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
4268 	id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
4269 	if (IS_SW_RESV_ADDR(id))
4270 		return -EBUSY;
4271 
4272 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4273 	if (unlikely(!sess))
4274 		return -EFAULT;
4275 
4276 	/* Another WWN used to have our s_id. Our PLOGI scheduled its
4277 	 * session deletion, but it's still in sess_del_work wq */
4278 	if (sess->deleted) {
4279 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4280 		    "New command while old session %p is being deleted\n",
4281 		    sess);
4282 		return -EFAULT;
4283 	}
4284 
4285 	/*
4286 	 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4287 	 */
4288 	if (!kref_get_unless_zero(&sess->sess_kref)) {
4289 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4290 		    "%s: kref_get fail, %8phC oxid %x \n",
4291 		    __func__, sess->port_name,
4292 		     be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4293 		return -EFAULT;
4294 	}
4295 
4296 	cmd = qlt_get_tag(vha, sess, atio);
4297 	if (!cmd) {
4298 		ql_dbg(ql_dbg_io, vha, 0x3062,
4299 		    "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4300 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4301 		ha->tgt.tgt_ops->put_sess(sess);
4302 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4303 		return -EBUSY;
4304 	}
4305 
4306 	cmd->cmd_in_wq = 1;
4307 	cmd->trc_flags |= TRC_NEW_CMD;
4308 
4309 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4310 	list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4311 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4312 
4313 	INIT_WORK(&cmd->work, qlt_do_work);
4314 	if (vha->flags.qpairs_available) {
4315 		queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4316 	} else if (ha->msix_count) {
4317 		if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4318 			queue_work_on(smp_processor_id(), qla_tgt_wq,
4319 			    &cmd->work);
4320 		else
4321 			queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4322 			    &cmd->work);
4323 	} else {
4324 		queue_work(qla_tgt_wq, &cmd->work);
4325 	}
4326 
4327 	return 0;
4328 }
4329 
4330 /* ha->hardware_lock supposed to be held on entry */
4331 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4332 	int fn, void *iocb, int flags)
4333 {
4334 	struct scsi_qla_host *vha = sess->vha;
4335 	struct qla_hw_data *ha = vha->hw;
4336 	struct qla_tgt_mgmt_cmd *mcmd;
4337 	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4338 	int res;
4339 
4340 	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4341 	if (!mcmd) {
4342 		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4343 		    "qla_target(%d): Allocation of management "
4344 		    "command failed, some commands and their data could "
4345 		    "leak\n", vha->vp_idx);
4346 		return -ENOMEM;
4347 	}
4348 	memset(mcmd, 0, sizeof(*mcmd));
4349 	mcmd->sess = sess;
4350 
4351 	if (iocb) {
4352 		memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4353 		    sizeof(mcmd->orig_iocb.imm_ntfy));
4354 	}
4355 	mcmd->tmr_func = fn;
4356 	mcmd->flags = flags;
4357 	mcmd->reset_count = ha->base_qpair->chip_reset;
4358 	mcmd->qpair = ha->base_qpair;
4359 	mcmd->vha = vha;
4360 
4361 	switch (fn) {
4362 	case QLA_TGT_LUN_RESET:
4363 	    abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4364 	    break;
4365 	}
4366 
4367 	res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4368 	if (res != 0) {
4369 		ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4370 		    "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4371 		    sess->vha->vp_idx, res);
4372 		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4373 		return -EFAULT;
4374 	}
4375 
4376 	return 0;
4377 }
4378 
4379 /* ha->hardware_lock supposed to be held on entry */
4380 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4381 {
4382 	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4383 	struct qla_hw_data *ha = vha->hw;
4384 	struct fc_port *sess;
4385 	u64 unpacked_lun;
4386 	int fn;
4387 	unsigned long flags;
4388 
4389 	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4390 
4391 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4392 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4393 	    a->u.isp24.fcp_hdr.s_id);
4394 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4395 
4396 	unpacked_lun =
4397 	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4398 
4399 	if (sess == NULL || sess->deleted)
4400 		return -EFAULT;
4401 
4402 	return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4403 }
4404 
4405 /* ha->hardware_lock supposed to be held on entry */
4406 static int __qlt_abort_task(struct scsi_qla_host *vha,
4407 	struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4408 {
4409 	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4410 	struct qla_hw_data *ha = vha->hw;
4411 	struct qla_tgt_mgmt_cmd *mcmd;
4412 	u64 unpacked_lun;
4413 	int rc;
4414 
4415 	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4416 	if (mcmd == NULL) {
4417 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4418 		    "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4419 		    vha->vp_idx, __func__);
4420 		return -ENOMEM;
4421 	}
4422 	memset(mcmd, 0, sizeof(*mcmd));
4423 
4424 	mcmd->sess = sess;
4425 	memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4426 	    sizeof(mcmd->orig_iocb.imm_ntfy));
4427 
4428 	unpacked_lun =
4429 	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4430 	mcmd->reset_count = ha->base_qpair->chip_reset;
4431 	mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4432 	mcmd->qpair = ha->base_qpair;
4433 
4434 	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4435 	    le16_to_cpu(iocb->u.isp2x.seq_id));
4436 	if (rc != 0) {
4437 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4438 		    "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4439 		    vha->vp_idx, rc);
4440 		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4441 		return -EFAULT;
4442 	}
4443 
4444 	return 0;
4445 }
4446 
4447 /* ha->hardware_lock supposed to be held on entry */
4448 static int qlt_abort_task(struct scsi_qla_host *vha,
4449 	struct imm_ntfy_from_isp *iocb)
4450 {
4451 	struct qla_hw_data *ha = vha->hw;
4452 	struct fc_port *sess;
4453 	int loop_id;
4454 	unsigned long flags;
4455 
4456 	loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4457 
4458 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4459 	sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4460 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4461 
4462 	if (sess == NULL) {
4463 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4464 		    "qla_target(%d): task abort for unexisting "
4465 		    "session\n", vha->vp_idx);
4466 		return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4467 		    QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4468 	}
4469 
4470 	return __qlt_abort_task(vha, iocb, sess);
4471 }
4472 
4473 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4474 {
4475 	if (rc != MBS_COMMAND_COMPLETE) {
4476 		ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4477 			"%s: se_sess %p / sess %p from"
4478 			" port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4479 			" LOGO failed: %#x\n",
4480 			__func__,
4481 			fcport->se_sess,
4482 			fcport,
4483 			fcport->port_name, fcport->loop_id,
4484 			fcport->d_id.b.domain, fcport->d_id.b.area,
4485 			fcport->d_id.b.al_pa, rc);
4486 	}
4487 
4488 	fcport->logout_completed = 1;
4489 }
4490 
4491 /*
4492 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4493 *
4494 * Schedules sessions with matching port_id/loop_id but different wwn for
4495 * deletion. Returns existing session with matching wwn if present.
4496 * Null otherwise.
4497 */
4498 struct fc_port *
4499 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4500     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4501 {
4502 	struct fc_port *sess = NULL, *other_sess;
4503 	uint64_t other_wwn;
4504 
4505 	*conflict_sess = NULL;
4506 
4507 	list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4508 
4509 		other_wwn = wwn_to_u64(other_sess->port_name);
4510 
4511 		if (wwn == other_wwn) {
4512 			WARN_ON(sess);
4513 			sess = other_sess;
4514 			continue;
4515 		}
4516 
4517 		/* find other sess with nport_id collision */
4518 		if (port_id.b24 == other_sess->d_id.b24) {
4519 			if (loop_id != other_sess->loop_id) {
4520 				ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4521 				    "Invalidating sess %p loop_id %d wwn %llx.\n",
4522 				    other_sess, other_sess->loop_id, other_wwn);
4523 
4524 				/*
4525 				 * logout_on_delete is set by default, but another
4526 				 * session that has the same s_id/loop_id combo
4527 				 * might have cleared it when requested this session
4528 				 * deletion, so don't touch it
4529 				 */
4530 				qlt_schedule_sess_for_deletion(other_sess);
4531 			} else {
4532 				/*
4533 				 * Another wwn used to have our s_id/loop_id
4534 				 * kill the session, but don't free the loop_id
4535 				 */
4536 				ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4537 				    "Invalidating sess %p loop_id %d wwn %llx.\n",
4538 				    other_sess, other_sess->loop_id, other_wwn);
4539 
4540 				other_sess->keep_nport_handle = 1;
4541 				if (other_sess->disc_state != DSC_DELETED)
4542 					*conflict_sess = other_sess;
4543 				qlt_schedule_sess_for_deletion(other_sess);
4544 			}
4545 			continue;
4546 		}
4547 
4548 		/* find other sess with nport handle collision */
4549 		if ((loop_id == other_sess->loop_id) &&
4550 			(loop_id != FC_NO_LOOP_ID)) {
4551 			ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4552 			       "Invalidating sess %p loop_id %d wwn %llx.\n",
4553 			       other_sess, other_sess->loop_id, other_wwn);
4554 
4555 			/* Same loop_id but different s_id
4556 			 * Ok to kill and logout */
4557 			qlt_schedule_sess_for_deletion(other_sess);
4558 		}
4559 	}
4560 
4561 	return sess;
4562 }
4563 
4564 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4565 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4566 {
4567 	struct qla_tgt_sess_op *op;
4568 	struct qla_tgt_cmd *cmd;
4569 	uint32_t key;
4570 	int count = 0;
4571 	unsigned long flags;
4572 
4573 	key = (((u32)s_id->b.domain << 16) |
4574 	       ((u32)s_id->b.area   <<  8) |
4575 	       ((u32)s_id->b.al_pa));
4576 
4577 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4578 	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4579 		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4580 
4581 		if (op_key == key) {
4582 			op->aborted = true;
4583 			count++;
4584 		}
4585 	}
4586 
4587 	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4588 		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4589 		if (op_key == key) {
4590 			op->aborted = true;
4591 			count++;
4592 		}
4593 	}
4594 
4595 	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4596 		uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4597 		if (cmd_key == key) {
4598 			cmd->aborted = 1;
4599 			count++;
4600 		}
4601 	}
4602 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4603 
4604 	return count;
4605 }
4606 
4607 static int qlt_handle_login(struct scsi_qla_host *vha,
4608     struct imm_ntfy_from_isp *iocb)
4609 {
4610 	struct fc_port *sess = NULL, *conflict_sess = NULL;
4611 	uint64_t wwn;
4612 	port_id_t port_id;
4613 	uint16_t loop_id, wd3_lo;
4614 	int res = 0;
4615 	struct qlt_plogi_ack_t *pla;
4616 	unsigned long flags;
4617 
4618 	wwn = wwn_to_u64(iocb->u.isp24.port_name);
4619 
4620 	port_id.b.domain = iocb->u.isp24.port_id[2];
4621 	port_id.b.area   = iocb->u.isp24.port_id[1];
4622 	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4623 	port_id.b.rsvd_1 = 0;
4624 
4625 	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4626 
4627 	/* Mark all stale commands sitting in qla_tgt_wq for deletion */
4628 	abort_cmds_for_s_id(vha, &port_id);
4629 
4630 	if (wwn) {
4631 		spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4632 		sess = qlt_find_sess_invalidate_other(vha, wwn,
4633 		    port_id, loop_id, &conflict_sess);
4634 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4635 	}
4636 
4637 	if (IS_SW_RESV_ADDR(port_id)) {
4638 		res = 1;
4639 		goto out;
4640 	}
4641 
4642 	pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4643 	if (!pla) {
4644 		qlt_send_term_imm_notif(vha, iocb, 1);
4645 		goto out;
4646 	}
4647 
4648 	if (conflict_sess) {
4649 		conflict_sess->login_gen++;
4650 		qlt_plogi_ack_link(vha, pla, conflict_sess,
4651 		    QLT_PLOGI_LINK_CONFLICT);
4652 	}
4653 
4654 	if (!sess) {
4655 		pla->ref_count++;
4656 		ql_dbg(ql_dbg_disc, vha, 0xffff,
4657 		    "%s %d %8phC post new sess\n",
4658 		    __func__, __LINE__, iocb->u.isp24.port_name);
4659 		if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4660 			qla24xx_post_newsess_work(vha, &port_id,
4661 			    iocb->u.isp24.port_name,
4662 			    iocb->u.isp24.u.plogi.node_name,
4663 			    pla, FC4_TYPE_UNKNOWN);
4664 		else
4665 			qla24xx_post_newsess_work(vha, &port_id,
4666 			    iocb->u.isp24.port_name, NULL,
4667 			    pla, FC4_TYPE_UNKNOWN);
4668 
4669 		goto out;
4670 	}
4671 
4672 	qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4673 	sess->d_id = port_id;
4674 	sess->login_gen++;
4675 
4676 	if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4677 		sess->fw_login_state = DSC_LS_PRLI_PEND;
4678 		sess->local = 0;
4679 		sess->loop_id = loop_id;
4680 		sess->d_id = port_id;
4681 		sess->fw_login_state = DSC_LS_PRLI_PEND;
4682 		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4683 
4684 		if (wd3_lo & BIT_7)
4685 			sess->conf_compl_supported = 1;
4686 
4687 		if ((wd3_lo & BIT_4) == 0)
4688 			sess->port_type = FCT_INITIATOR;
4689 		else
4690 			sess->port_type = FCT_TARGET;
4691 
4692 	} else
4693 		sess->fw_login_state = DSC_LS_PLOGI_PEND;
4694 
4695 
4696 	ql_dbg(ql_dbg_disc, vha, 0x20f9,
4697 	    "%s %d %8phC  DS %d\n",
4698 	    __func__, __LINE__, sess->port_name, sess->disc_state);
4699 
4700 	switch (sess->disc_state) {
4701 	case DSC_DELETED:
4702 		qlt_plogi_ack_unref(vha, pla);
4703 		break;
4704 
4705 	default:
4706 		/*
4707 		 * Under normal circumstances we want to release nport handle
4708 		 * during LOGO process to avoid nport handle leaks inside FW.
4709 		 * The exception is when LOGO is done while another PLOGI with
4710 		 * the same nport handle is waiting as might be the case here.
4711 		 * Note: there is always a possibily of a race where session
4712 		 * deletion has already started for other reasons (e.g. ACL
4713 		 * removal) and now PLOGI arrives:
4714 		 * 1. if PLOGI arrived in FW after nport handle has been freed,
4715 		 *    FW must have assigned this PLOGI a new/same handle and we
4716 		 *    can proceed ACK'ing it as usual when session deletion
4717 		 *    completes.
4718 		 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4719 		 *    bit reached it, the handle has now been released. We'll
4720 		 *    get an error when we ACK this PLOGI. Nothing will be sent
4721 		 *    back to initiator. Initiator should eventually retry
4722 		 *    PLOGI and situation will correct itself.
4723 		 */
4724 		sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4725 		    (sess->d_id.b24 == port_id.b24));
4726 
4727 		ql_dbg(ql_dbg_disc, vha, 0x20f9,
4728 		    "%s %d %8phC post del sess\n",
4729 		    __func__, __LINE__, sess->port_name);
4730 
4731 
4732 		qlt_schedule_sess_for_deletion(sess);
4733 		break;
4734 	}
4735 out:
4736 	return res;
4737 }
4738 
4739 /*
4740  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4741  */
4742 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4743 	struct imm_ntfy_from_isp *iocb)
4744 {
4745 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4746 	struct qla_hw_data *ha = vha->hw;
4747 	struct fc_port *sess = NULL, *conflict_sess = NULL;
4748 	uint64_t wwn;
4749 	port_id_t port_id;
4750 	uint16_t loop_id;
4751 	uint16_t wd3_lo;
4752 	int res = 0;
4753 	unsigned long flags;
4754 
4755 	wwn = wwn_to_u64(iocb->u.isp24.port_name);
4756 
4757 	port_id.b.domain = iocb->u.isp24.port_id[2];
4758 	port_id.b.area   = iocb->u.isp24.port_id[1];
4759 	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4760 	port_id.b.rsvd_1 = 0;
4761 
4762 	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4763 
4764 	ql_dbg(ql_dbg_disc, vha, 0xf026,
4765 	    "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4766 	    vha->vp_idx, iocb->u.isp24.port_id[2],
4767 		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4768 		   iocb->u.isp24.status_subcode, loop_id,
4769 		iocb->u.isp24.port_name);
4770 
4771 	/* res = 1 means ack at the end of thread
4772 	 * res = 0 means ack async/later.
4773 	 */
4774 	switch (iocb->u.isp24.status_subcode) {
4775 	case ELS_PLOGI:
4776 		res = qlt_handle_login(vha, iocb);
4777 		break;
4778 
4779 	case ELS_PRLI:
4780 		if (N2N_TOPO(ha)) {
4781 			sess = qla2x00_find_fcport_by_wwpn(vha,
4782 			    iocb->u.isp24.port_name, 1);
4783 
4784 			if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4785 				ql_dbg(ql_dbg_disc, vha, 0xffff,
4786 				    "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4787 				    __func__, __LINE__,
4788 				    iocb->u.isp24.port_name);
4789 				qlt_send_term_imm_notif(vha, iocb, 1);
4790 				break;
4791 			}
4792 
4793 			res = qlt_handle_login(vha, iocb);
4794 			break;
4795 		}
4796 
4797 		if (IS_SW_RESV_ADDR(port_id)) {
4798 			res = 1;
4799 			break;
4800 		}
4801 
4802 		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4803 
4804 		if (wwn) {
4805 			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4806 			sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4807 				loop_id, &conflict_sess);
4808 			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4809 		}
4810 
4811 		if (conflict_sess) {
4812 			switch (conflict_sess->disc_state) {
4813 			case DSC_DELETED:
4814 			case DSC_DELETE_PEND:
4815 				break;
4816 			default:
4817 				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4818 				    "PRLI with conflicting sess %p port %8phC\n",
4819 				    conflict_sess, conflict_sess->port_name);
4820 				conflict_sess->fw_login_state =
4821 				    DSC_LS_PORT_UNAVAIL;
4822 				qlt_send_term_imm_notif(vha, iocb, 1);
4823 				res = 0;
4824 				break;
4825 			}
4826 		}
4827 
4828 		if (sess != NULL) {
4829 			bool delete = false;
4830 			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4831 			switch (sess->fw_login_state) {
4832 			case DSC_LS_PLOGI_PEND:
4833 			case DSC_LS_PLOGI_COMP:
4834 			case DSC_LS_PRLI_COMP:
4835 				break;
4836 			default:
4837 				delete = true;
4838 				break;
4839 			}
4840 
4841 			switch (sess->disc_state) {
4842 			case DSC_LOGIN_PEND:
4843 			case DSC_GPDB:
4844 			case DSC_GPSC:
4845 			case DSC_UPD_FCPORT:
4846 			case DSC_LOGIN_COMPLETE:
4847 			case DSC_ADISC:
4848 				delete = false;
4849 				break;
4850 			default:
4851 				break;
4852 			}
4853 
4854 			if (delete) {
4855 				spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4856 				    flags);
4857 				/*
4858 				 * Impatient initiator sent PRLI before last
4859 				 * PLOGI could finish. Will force him to re-try,
4860 				 * while last one finishes.
4861 				 */
4862 				ql_log(ql_log_warn, sess->vha, 0xf095,
4863 				    "sess %p PRLI received, before plogi ack.\n",
4864 				    sess);
4865 				qlt_send_term_imm_notif(vha, iocb, 1);
4866 				res = 0;
4867 				break;
4868 			}
4869 
4870 			/*
4871 			 * This shouldn't happen under normal circumstances,
4872 			 * since we have deleted the old session during PLOGI
4873 			 */
4874 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4875 			    "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4876 			    sess->loop_id, sess, iocb->u.isp24.nport_handle);
4877 
4878 			sess->local = 0;
4879 			sess->loop_id = loop_id;
4880 			sess->d_id = port_id;
4881 			sess->fw_login_state = DSC_LS_PRLI_PEND;
4882 
4883 			if (wd3_lo & BIT_7)
4884 				sess->conf_compl_supported = 1;
4885 
4886 			if ((wd3_lo & BIT_4) == 0)
4887 				sess->port_type = FCT_INITIATOR;
4888 			else
4889 				sess->port_type = FCT_TARGET;
4890 
4891 			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4892 		}
4893 		res = 1; /* send notify ack */
4894 
4895 		/* Make session global (not used in fabric mode) */
4896 		if (ha->current_topology != ISP_CFG_F) {
4897 			if (sess) {
4898 				ql_dbg(ql_dbg_disc, vha, 0x20fa,
4899 				    "%s %d %8phC post nack\n",
4900 				    __func__, __LINE__, sess->port_name);
4901 				qla24xx_post_nack_work(vha, sess, iocb,
4902 					SRB_NACK_PRLI);
4903 				res = 0;
4904 			} else {
4905 				set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4906 				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4907 				qla2xxx_wake_dpc(vha);
4908 			}
4909 		} else {
4910 			if (sess) {
4911 				ql_dbg(ql_dbg_disc, vha, 0x20fb,
4912 				    "%s %d %8phC post nack\n",
4913 				    __func__, __LINE__, sess->port_name);
4914 				qla24xx_post_nack_work(vha, sess, iocb,
4915 					SRB_NACK_PRLI);
4916 				res = 0;
4917 			}
4918 		}
4919 		break;
4920 
4921 	case ELS_TPRLO:
4922 		if (le16_to_cpu(iocb->u.isp24.flags) &
4923 			NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4924 			loop_id = 0xFFFF;
4925 			qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4926 			res = 1;
4927 			break;
4928 		}
4929 		/* fall through */
4930 	case ELS_LOGO:
4931 	case ELS_PRLO:
4932 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4933 		sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4934 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4935 
4936 		if (sess) {
4937 			sess->login_gen++;
4938 			sess->fw_login_state = DSC_LS_LOGO_PEND;
4939 			sess->logo_ack_needed = 1;
4940 			memcpy(sess->iocb, iocb, IOCB_SIZE);
4941 		}
4942 
4943 		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4944 
4945 		ql_dbg(ql_dbg_disc, vha, 0x20fc,
4946 		    "%s: logo %llx res %d sess %p ",
4947 		    __func__, wwn, res, sess);
4948 		if (res == 0) {
4949 			/*
4950 			 * cmd went upper layer, look for qlt_xmit_tm_rsp()
4951 			 * for LOGO_ACK & sess delete
4952 			 */
4953 			BUG_ON(!sess);
4954 			res = 0;
4955 		} else {
4956 			/* cmd did not go to upper layer. */
4957 			if (sess) {
4958 				qlt_schedule_sess_for_deletion(sess);
4959 				res = 0;
4960 			}
4961 			/* else logo will be ack */
4962 		}
4963 		break;
4964 	case ELS_PDISC:
4965 	case ELS_ADISC:
4966 	{
4967 		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4968 		if (tgt->link_reinit_iocb_pending) {
4969 			qlt_send_notify_ack(ha->base_qpair,
4970 			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4971 			tgt->link_reinit_iocb_pending = 0;
4972 		}
4973 
4974 		sess = qla2x00_find_fcport_by_wwpn(vha,
4975 		    iocb->u.isp24.port_name, 1);
4976 		if (sess) {
4977 			ql_dbg(ql_dbg_disc, vha, 0x20fd,
4978 				"sess %p lid %d|%d DS %d LS %d\n",
4979 				sess, sess->loop_id, loop_id,
4980 				sess->disc_state, sess->fw_login_state);
4981 		}
4982 
4983 		res = 1; /* send notify ack */
4984 		break;
4985 	}
4986 
4987 	case ELS_FLOGI:	/* should never happen */
4988 	default:
4989 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4990 		    "qla_target(%d): Unsupported ELS command %x "
4991 		    "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4992 		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4993 		break;
4994 	}
4995 
4996 	ql_dbg(ql_dbg_disc, vha, 0xf026,
4997 	    "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
4998 	    vha->vp_idx, iocb->u.isp24.status_subcode, res);
4999 
5000 	return res;
5001 }
5002 
5003 /*
5004  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5005  */
5006 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5007 	struct imm_ntfy_from_isp *iocb)
5008 {
5009 	struct qla_hw_data *ha = vha->hw;
5010 	uint32_t add_flags = 0;
5011 	int send_notify_ack = 1;
5012 	uint16_t status;
5013 
5014 	status = le16_to_cpu(iocb->u.isp2x.status);
5015 	switch (status) {
5016 	case IMM_NTFY_LIP_RESET:
5017 	{
5018 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5019 		    "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5020 		    vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5021 		    iocb->u.isp24.status_subcode);
5022 
5023 		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5024 			send_notify_ack = 0;
5025 		break;
5026 	}
5027 
5028 	case IMM_NTFY_LIP_LINK_REINIT:
5029 	{
5030 		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5031 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5032 		    "qla_target(%d): LINK REINIT (loop %#x, "
5033 		    "subcode %x)\n", vha->vp_idx,
5034 		    le16_to_cpu(iocb->u.isp24.nport_handle),
5035 		    iocb->u.isp24.status_subcode);
5036 		if (tgt->link_reinit_iocb_pending) {
5037 			qlt_send_notify_ack(ha->base_qpair,
5038 			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5039 		}
5040 		memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5041 		tgt->link_reinit_iocb_pending = 1;
5042 		/*
5043 		 * QLogic requires to wait after LINK REINIT for possible
5044 		 * PDISC or ADISC ELS commands
5045 		 */
5046 		send_notify_ack = 0;
5047 		break;
5048 	}
5049 
5050 	case IMM_NTFY_PORT_LOGOUT:
5051 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5052 		    "qla_target(%d): Port logout (loop "
5053 		    "%#x, subcode %x)\n", vha->vp_idx,
5054 		    le16_to_cpu(iocb->u.isp24.nport_handle),
5055 		    iocb->u.isp24.status_subcode);
5056 
5057 		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5058 			send_notify_ack = 0;
5059 		/* The sessions will be cleared in the callback, if needed */
5060 		break;
5061 
5062 	case IMM_NTFY_GLBL_TPRLO:
5063 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5064 		    "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5065 		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5066 			send_notify_ack = 0;
5067 		/* The sessions will be cleared in the callback, if needed */
5068 		break;
5069 
5070 	case IMM_NTFY_PORT_CONFIG:
5071 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5072 		    "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5073 		    status);
5074 		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5075 			send_notify_ack = 0;
5076 		/* The sessions will be cleared in the callback, if needed */
5077 		break;
5078 
5079 	case IMM_NTFY_GLBL_LOGO:
5080 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5081 		    "qla_target(%d): Link failure detected\n",
5082 		    vha->vp_idx);
5083 		/* I_T nexus loss */
5084 		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5085 			send_notify_ack = 0;
5086 		break;
5087 
5088 	case IMM_NTFY_IOCB_OVERFLOW:
5089 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5090 		    "qla_target(%d): Cannot provide requested "
5091 		    "capability (IOCB overflowed the immediate notify "
5092 		    "resource count)\n", vha->vp_idx);
5093 		break;
5094 
5095 	case IMM_NTFY_ABORT_TASK:
5096 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5097 		    "qla_target(%d): Abort Task (S %08x I %#x -> "
5098 		    "L %#x)\n", vha->vp_idx,
5099 		    le16_to_cpu(iocb->u.isp2x.seq_id),
5100 		    GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5101 		    le16_to_cpu(iocb->u.isp2x.lun));
5102 		if (qlt_abort_task(vha, iocb) == 0)
5103 			send_notify_ack = 0;
5104 		break;
5105 
5106 	case IMM_NTFY_RESOURCE:
5107 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5108 		    "qla_target(%d): Out of resources, host %ld\n",
5109 		    vha->vp_idx, vha->host_no);
5110 		break;
5111 
5112 	case IMM_NTFY_MSG_RX:
5113 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5114 		    "qla_target(%d): Immediate notify task %x\n",
5115 		    vha->vp_idx, iocb->u.isp2x.task_flags);
5116 		if (qlt_handle_task_mgmt(vha, iocb) == 0)
5117 			send_notify_ack = 0;
5118 		break;
5119 
5120 	case IMM_NTFY_ELS:
5121 		if (qlt_24xx_handle_els(vha, iocb) == 0)
5122 			send_notify_ack = 0;
5123 		break;
5124 	default:
5125 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5126 		    "qla_target(%d): Received unknown immediate "
5127 		    "notify status %x\n", vha->vp_idx, status);
5128 		break;
5129 	}
5130 
5131 	if (send_notify_ack)
5132 		qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5133 		    0, 0);
5134 }
5135 
5136 /*
5137  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5138  * This function sends busy to ISP 2xxx or 24xx.
5139  */
5140 static int __qlt_send_busy(struct qla_qpair *qpair,
5141 	struct atio_from_isp *atio, uint16_t status)
5142 {
5143 	struct scsi_qla_host *vha = qpair->vha;
5144 	struct ctio7_to_24xx *ctio24;
5145 	struct qla_hw_data *ha = vha->hw;
5146 	request_t *pkt;
5147 	struct fc_port *sess = NULL;
5148 	unsigned long flags;
5149 	u16 temp;
5150 
5151 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5152 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5153 	    atio->u.isp24.fcp_hdr.s_id);
5154 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5155 	if (!sess) {
5156 		qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5157 		return 0;
5158 	}
5159 	/* Sending marker isn't necessary, since we called from ISR */
5160 
5161 	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5162 	if (!pkt) {
5163 		ql_dbg(ql_dbg_io, vha, 0x3063,
5164 		    "qla_target(%d): %s failed: unable to allocate "
5165 		    "request packet", vha->vp_idx, __func__);
5166 		return -ENOMEM;
5167 	}
5168 
5169 	qpair->tgt_counters.num_q_full_sent++;
5170 	pkt->entry_count = 1;
5171 	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5172 
5173 	ctio24 = (struct ctio7_to_24xx *)pkt;
5174 	ctio24->entry_type = CTIO_TYPE7;
5175 	ctio24->nport_handle = sess->loop_id;
5176 	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5177 	ctio24->vp_index = vha->vp_idx;
5178 	ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5179 	ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5180 	ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5181 	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5182 	temp = (atio->u.isp24.attr << 9) |
5183 		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5184 		CTIO7_FLAGS_DONT_RET_CTIO;
5185 	ctio24->u.status1.flags = cpu_to_le16(temp);
5186 	/*
5187 	 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5188 	 * if the explicit conformation is used.
5189 	 */
5190 	ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5191 	ctio24->u.status1.scsi_status = cpu_to_le16(status);
5192 	/* Memory Barrier */
5193 	wmb();
5194 	if (qpair->reqq_start_iocbs)
5195 		qpair->reqq_start_iocbs(qpair);
5196 	else
5197 		qla2x00_start_iocbs(vha, qpair->req);
5198 	return 0;
5199 }
5200 
5201 /*
5202  * This routine is used to allocate a command for either a QFull condition
5203  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5204  * out previously.
5205  */
5206 static void
5207 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5208 	struct atio_from_isp *atio, uint16_t status, int qfull)
5209 {
5210 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5211 	struct qla_hw_data *ha = vha->hw;
5212 	struct fc_port *sess;
5213 	struct se_session *se_sess;
5214 	struct qla_tgt_cmd *cmd;
5215 	int tag;
5216 	unsigned long flags;
5217 
5218 	if (unlikely(tgt->tgt_stop)) {
5219 		ql_dbg(ql_dbg_io, vha, 0x300a,
5220 			"New command while device %p is shutting down\n", tgt);
5221 		return;
5222 	}
5223 
5224 	if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5225 		vha->hw->tgt.num_qfull_cmds_dropped++;
5226 		if (vha->hw->tgt.num_qfull_cmds_dropped >
5227 			vha->qla_stats.stat_max_qfull_cmds_dropped)
5228 			vha->qla_stats.stat_max_qfull_cmds_dropped =
5229 				vha->hw->tgt.num_qfull_cmds_dropped;
5230 
5231 		ql_dbg(ql_dbg_io, vha, 0x3068,
5232 			"qla_target(%d): %s: QFull CMD dropped[%d]\n",
5233 			vha->vp_idx, __func__,
5234 			vha->hw->tgt.num_qfull_cmds_dropped);
5235 
5236 		qlt_chk_exch_leak_thresh_hold(vha);
5237 		return;
5238 	}
5239 
5240 	sess = ha->tgt.tgt_ops->find_sess_by_s_id
5241 		(vha, atio->u.isp24.fcp_hdr.s_id);
5242 	if (!sess)
5243 		return;
5244 
5245 	se_sess = sess->se_sess;
5246 
5247 	tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5248 	if (tag < 0)
5249 		return;
5250 
5251 	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5252 	if (!cmd) {
5253 		ql_dbg(ql_dbg_io, vha, 0x3009,
5254 			"qla_target(%d): %s: Allocation of cmd failed\n",
5255 			vha->vp_idx, __func__);
5256 
5257 		vha->hw->tgt.num_qfull_cmds_dropped++;
5258 		if (vha->hw->tgt.num_qfull_cmds_dropped >
5259 			vha->qla_stats.stat_max_qfull_cmds_dropped)
5260 			vha->qla_stats.stat_max_qfull_cmds_dropped =
5261 				vha->hw->tgt.num_qfull_cmds_dropped;
5262 
5263 		qlt_chk_exch_leak_thresh_hold(vha);
5264 		return;
5265 	}
5266 
5267 	memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5268 
5269 	qlt_incr_num_pend_cmds(vha);
5270 	INIT_LIST_HEAD(&cmd->cmd_list);
5271 	memcpy(&cmd->atio, atio, sizeof(*atio));
5272 
5273 	cmd->tgt = vha->vha_tgt.qla_tgt;
5274 	cmd->vha = vha;
5275 	cmd->reset_count = ha->base_qpair->chip_reset;
5276 	cmd->q_full = 1;
5277 	cmd->qpair = ha->base_qpair;
5278 
5279 	if (qfull) {
5280 		cmd->q_full = 1;
5281 		/* NOTE: borrowing the state field to carry the status */
5282 		cmd->state = status;
5283 	} else
5284 		cmd->term_exchg = 1;
5285 
5286 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5287 	list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5288 
5289 	vha->hw->tgt.num_qfull_cmds_alloc++;
5290 	if (vha->hw->tgt.num_qfull_cmds_alloc >
5291 		vha->qla_stats.stat_max_qfull_cmds_alloc)
5292 		vha->qla_stats.stat_max_qfull_cmds_alloc =
5293 			vha->hw->tgt.num_qfull_cmds_alloc;
5294 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5295 }
5296 
5297 int
5298 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5299 {
5300 	struct scsi_qla_host *vha = qpair->vha;
5301 	struct qla_hw_data *ha = vha->hw;
5302 	unsigned long flags;
5303 	struct qla_tgt_cmd *cmd, *tcmd;
5304 	struct list_head free_list, q_full_list;
5305 	int rc = 0;
5306 
5307 	if (list_empty(&ha->tgt.q_full_list))
5308 		return 0;
5309 
5310 	INIT_LIST_HEAD(&free_list);
5311 	INIT_LIST_HEAD(&q_full_list);
5312 
5313 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5314 	if (list_empty(&ha->tgt.q_full_list)) {
5315 		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5316 		return 0;
5317 	}
5318 
5319 	list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5320 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5321 
5322 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5323 	list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5324 		if (cmd->q_full)
5325 			/* cmd->state is a borrowed field to hold status */
5326 			rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5327 		else if (cmd->term_exchg)
5328 			rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5329 
5330 		if (rc == -ENOMEM)
5331 			break;
5332 
5333 		if (cmd->q_full)
5334 			ql_dbg(ql_dbg_io, vha, 0x3006,
5335 			    "%s: busy sent for ox_id[%04x]\n", __func__,
5336 			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5337 		else if (cmd->term_exchg)
5338 			ql_dbg(ql_dbg_io, vha, 0x3007,
5339 			    "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5340 			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5341 		else
5342 			ql_dbg(ql_dbg_io, vha, 0x3008,
5343 			    "%s: Unexpected cmd in QFull list %p\n", __func__,
5344 			    cmd);
5345 
5346 		list_del(&cmd->cmd_list);
5347 		list_add_tail(&cmd->cmd_list, &free_list);
5348 
5349 		/* piggy back on hardware_lock for protection */
5350 		vha->hw->tgt.num_qfull_cmds_alloc--;
5351 	}
5352 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5353 
5354 	cmd = NULL;
5355 
5356 	list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5357 		list_del(&cmd->cmd_list);
5358 		/* This cmd was never sent to TCM.  There is no need
5359 		 * to schedule free or call free_cmd
5360 		 */
5361 		qlt_free_cmd(cmd);
5362 	}
5363 
5364 	if (!list_empty(&q_full_list)) {
5365 		spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5366 		list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5367 		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5368 	}
5369 
5370 	return rc;
5371 }
5372 
5373 static void
5374 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5375     uint16_t status)
5376 {
5377 	int rc = 0;
5378 	struct scsi_qla_host *vha = qpair->vha;
5379 
5380 	rc = __qlt_send_busy(qpair, atio, status);
5381 	if (rc == -ENOMEM)
5382 		qlt_alloc_qfull_cmd(vha, atio, status, 1);
5383 }
5384 
5385 static int
5386 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5387 	struct atio_from_isp *atio, uint8_t ha_locked)
5388 {
5389 	struct qla_hw_data *ha = vha->hw;
5390 	unsigned long flags;
5391 
5392 	if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5393 		return 0;
5394 
5395 	if (!ha_locked)
5396 		spin_lock_irqsave(&ha->hardware_lock, flags);
5397 	qlt_send_busy(qpair, atio, qla_sam_status);
5398 	if (!ha_locked)
5399 		spin_unlock_irqrestore(&ha->hardware_lock, flags);
5400 
5401 	return 1;
5402 }
5403 
5404 /* ha->hardware_lock supposed to be held on entry */
5405 /* called via callback from qla2xxx */
5406 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5407 	struct atio_from_isp *atio, uint8_t ha_locked)
5408 {
5409 	struct qla_hw_data *ha = vha->hw;
5410 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5411 	int rc;
5412 	unsigned long flags = 0;
5413 
5414 	if (unlikely(tgt == NULL)) {
5415 		ql_dbg(ql_dbg_tgt, vha, 0x3064,
5416 		    "ATIO pkt, but no tgt (ha %p)", ha);
5417 		return;
5418 	}
5419 	/*
5420 	 * In tgt_stop mode we also should allow all requests to pass.
5421 	 * Otherwise, some commands can stuck.
5422 	 */
5423 
5424 	tgt->atio_irq_cmd_count++;
5425 
5426 	switch (atio->u.raw.entry_type) {
5427 	case ATIO_TYPE7:
5428 		if (unlikely(atio->u.isp24.exchange_addr ==
5429 		    ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5430 			ql_dbg(ql_dbg_io, vha, 0x3065,
5431 			    "qla_target(%d): ATIO_TYPE7 "
5432 			    "received with UNKNOWN exchange address, "
5433 			    "sending QUEUE_FULL\n", vha->vp_idx);
5434 			if (!ha_locked)
5435 				spin_lock_irqsave(&ha->hardware_lock, flags);
5436 			qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5437 			if (!ha_locked)
5438 				spin_unlock_irqrestore(&ha->hardware_lock,
5439 				    flags);
5440 			break;
5441 		}
5442 
5443 		if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5444 			rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5445 			    atio, ha_locked);
5446 			if (rc != 0) {
5447 				tgt->atio_irq_cmd_count--;
5448 				return;
5449 			}
5450 			rc = qlt_handle_cmd_for_atio(vha, atio);
5451 		} else {
5452 			rc = qlt_handle_task_mgmt(vha, atio);
5453 		}
5454 		if (unlikely(rc != 0)) {
5455 			if (!ha_locked)
5456 				spin_lock_irqsave(&ha->hardware_lock, flags);
5457 			switch (rc) {
5458 			case -ENODEV:
5459 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5460 				    "qla_target: Unable to send command to target\n");
5461 				break;
5462 			case -EBADF:
5463 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5464 				    "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5465 				qlt_send_term_exchange(ha->base_qpair, NULL,
5466 				    atio, 1, 0);
5467 				break;
5468 			case -EBUSY:
5469 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5470 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5471 				    vha->vp_idx);
5472 				qlt_send_busy(ha->base_qpair, atio,
5473 				    tc_sam_status);
5474 				break;
5475 			default:
5476 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5477 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5478 				    vha->vp_idx);
5479 				qlt_send_busy(ha->base_qpair, atio,
5480 				    qla_sam_status);
5481 				break;
5482 			}
5483 			if (!ha_locked)
5484 				spin_unlock_irqrestore(&ha->hardware_lock,
5485 				    flags);
5486 		}
5487 		break;
5488 
5489 	case IMMED_NOTIFY_TYPE:
5490 	{
5491 		if (unlikely(atio->u.isp2x.entry_status != 0)) {
5492 			ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5493 			    "qla_target(%d): Received ATIO packet %x "
5494 			    "with error status %x\n", vha->vp_idx,
5495 			    atio->u.raw.entry_type,
5496 			    atio->u.isp2x.entry_status);
5497 			break;
5498 		}
5499 		ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5500 
5501 		if (!ha_locked)
5502 			spin_lock_irqsave(&ha->hardware_lock, flags);
5503 		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5504 		if (!ha_locked)
5505 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
5506 		break;
5507 	}
5508 
5509 	default:
5510 		ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5511 		    "qla_target(%d): Received unknown ATIO atio "
5512 		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5513 		break;
5514 	}
5515 
5516 	tgt->atio_irq_cmd_count--;
5517 }
5518 
5519 /* ha->hardware_lock supposed to be held on entry */
5520 /* called via callback from qla2xxx */
5521 static void qlt_response_pkt(struct scsi_qla_host *vha,
5522 	struct rsp_que *rsp, response_t *pkt)
5523 {
5524 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5525 
5526 	if (unlikely(tgt == NULL)) {
5527 		ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5528 		    "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5529 		    vha->vp_idx, pkt->entry_type, vha->hw);
5530 		return;
5531 	}
5532 
5533 	/*
5534 	 * In tgt_stop mode we also should allow all requests to pass.
5535 	 * Otherwise, some commands can stuck.
5536 	 */
5537 
5538 	switch (pkt->entry_type) {
5539 	case CTIO_CRC2:
5540 	case CTIO_TYPE7:
5541 	{
5542 		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5543 		qlt_do_ctio_completion(vha, rsp, entry->handle,
5544 		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5545 		    entry);
5546 		break;
5547 	}
5548 
5549 	case ACCEPT_TGT_IO_TYPE:
5550 	{
5551 		struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5552 		int rc;
5553 		if (atio->u.isp2x.status !=
5554 		    cpu_to_le16(ATIO_CDB_VALID)) {
5555 			ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5556 			    "qla_target(%d): ATIO with error "
5557 			    "status %x received\n", vha->vp_idx,
5558 			    le16_to_cpu(atio->u.isp2x.status));
5559 			break;
5560 		}
5561 
5562 		rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5563 		if (rc != 0)
5564 			return;
5565 
5566 		rc = qlt_handle_cmd_for_atio(vha, atio);
5567 		if (unlikely(rc != 0)) {
5568 			switch (rc) {
5569 			case -ENODEV:
5570 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5571 				    "qla_target: Unable to send command to target\n");
5572 				break;
5573 			case -EBADF:
5574 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5575 				    "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5576 				qlt_send_term_exchange(rsp->qpair, NULL,
5577 				    atio, 1, 0);
5578 				break;
5579 			case -EBUSY:
5580 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5581 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5582 				    vha->vp_idx);
5583 				qlt_send_busy(rsp->qpair, atio,
5584 				    tc_sam_status);
5585 				break;
5586 			default:
5587 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5588 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5589 				    vha->vp_idx);
5590 				qlt_send_busy(rsp->qpair, atio,
5591 				    qla_sam_status);
5592 				break;
5593 			}
5594 		}
5595 	}
5596 	break;
5597 
5598 	case CONTINUE_TGT_IO_TYPE:
5599 	{
5600 		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5601 		qlt_do_ctio_completion(vha, rsp, entry->handle,
5602 		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5603 		    entry);
5604 		break;
5605 	}
5606 
5607 	case CTIO_A64_TYPE:
5608 	{
5609 		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5610 		qlt_do_ctio_completion(vha, rsp, entry->handle,
5611 		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5612 		    entry);
5613 		break;
5614 	}
5615 
5616 	case IMMED_NOTIFY_TYPE:
5617 		ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5618 		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5619 		break;
5620 
5621 	case NOTIFY_ACK_TYPE:
5622 		if (tgt->notify_ack_expected > 0) {
5623 			struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5624 			ql_dbg(ql_dbg_tgt, vha, 0xe036,
5625 			    "NOTIFY_ACK seq %08x status %x\n",
5626 			    le16_to_cpu(entry->u.isp2x.seq_id),
5627 			    le16_to_cpu(entry->u.isp2x.status));
5628 			tgt->notify_ack_expected--;
5629 			if (entry->u.isp2x.status !=
5630 			    cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5631 				ql_dbg(ql_dbg_tgt, vha, 0xe061,
5632 				    "qla_target(%d): NOTIFY_ACK "
5633 				    "failed %x\n", vha->vp_idx,
5634 				    le16_to_cpu(entry->u.isp2x.status));
5635 			}
5636 		} else {
5637 			ql_dbg(ql_dbg_tgt, vha, 0xe062,
5638 			    "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5639 			    vha->vp_idx);
5640 		}
5641 		break;
5642 
5643 	case ABTS_RECV_24XX:
5644 		ql_dbg(ql_dbg_tgt, vha, 0xe037,
5645 		    "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5646 		qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5647 		break;
5648 
5649 	case ABTS_RESP_24XX:
5650 		if (tgt->abts_resp_expected > 0) {
5651 			struct abts_resp_from_24xx_fw *entry =
5652 				(struct abts_resp_from_24xx_fw *)pkt;
5653 			ql_dbg(ql_dbg_tgt, vha, 0xe038,
5654 			    "ABTS_RESP_24XX: compl_status %x\n",
5655 			    entry->compl_status);
5656 			tgt->abts_resp_expected--;
5657 			if (le16_to_cpu(entry->compl_status) !=
5658 			    ABTS_RESP_COMPL_SUCCESS) {
5659 				if ((entry->error_subcode1 == 0x1E) &&
5660 				    (entry->error_subcode2 == 0)) {
5661 					/*
5662 					 * We've got a race here: aborted
5663 					 * exchange not terminated, i.e.
5664 					 * response for the aborted command was
5665 					 * sent between the abort request was
5666 					 * received and processed.
5667 					 * Unfortunately, the firmware has a
5668 					 * silly requirement that all aborted
5669 					 * exchanges must be explicitely
5670 					 * terminated, otherwise it refuses to
5671 					 * send responses for the abort
5672 					 * requests. So, we have to
5673 					 * (re)terminate the exchange and retry
5674 					 * the abort response.
5675 					 */
5676 					qlt_24xx_retry_term_exchange(vha,
5677 					    entry);
5678 				} else
5679 					ql_dbg(ql_dbg_tgt, vha, 0xe063,
5680 					    "qla_target(%d): ABTS_RESP_24XX "
5681 					    "failed %x (subcode %x:%x)",
5682 					    vha->vp_idx, entry->compl_status,
5683 					    entry->error_subcode1,
5684 					    entry->error_subcode2);
5685 			}
5686 		} else {
5687 			ql_dbg(ql_dbg_tgt, vha, 0xe064,
5688 			    "qla_target(%d): Unexpected ABTS_RESP_24XX "
5689 			    "received\n", vha->vp_idx);
5690 		}
5691 		break;
5692 
5693 	default:
5694 		ql_dbg(ql_dbg_tgt, vha, 0xe065,
5695 		    "qla_target(%d): Received unknown response pkt "
5696 		    "type %x\n", vha->vp_idx, pkt->entry_type);
5697 		break;
5698 	}
5699 
5700 }
5701 
5702 /*
5703  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5704  */
5705 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5706 	uint16_t *mailbox)
5707 {
5708 	struct qla_hw_data *ha = vha->hw;
5709 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5710 	int login_code;
5711 
5712 	if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5713 		return;
5714 
5715 	if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5716 	    IS_QLA2100(ha))
5717 		return;
5718 	/*
5719 	 * In tgt_stop mode we also should allow all requests to pass.
5720 	 * Otherwise, some commands can stuck.
5721 	 */
5722 
5723 
5724 	switch (code) {
5725 	case MBA_RESET:			/* Reset */
5726 	case MBA_SYSTEM_ERR:		/* System Error */
5727 	case MBA_REQ_TRANSFER_ERR:	/* Request Transfer Error */
5728 	case MBA_RSP_TRANSFER_ERR:	/* Response Transfer Error */
5729 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5730 		    "qla_target(%d): System error async event %#x "
5731 		    "occurred", vha->vp_idx, code);
5732 		break;
5733 	case MBA_WAKEUP_THRES:		/* Request Queue Wake-up. */
5734 		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5735 		break;
5736 
5737 	case MBA_LOOP_UP:
5738 	{
5739 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5740 		    "qla_target(%d): Async LOOP_UP occurred "
5741 		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5742 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5743 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5744 		if (tgt->link_reinit_iocb_pending) {
5745 			qlt_send_notify_ack(ha->base_qpair,
5746 			    (void *)&tgt->link_reinit_iocb,
5747 			    0, 0, 0, 0, 0, 0);
5748 			tgt->link_reinit_iocb_pending = 0;
5749 		}
5750 		break;
5751 	}
5752 
5753 	case MBA_LIP_OCCURRED:
5754 	case MBA_LOOP_DOWN:
5755 	case MBA_LIP_RESET:
5756 	case MBA_RSCN_UPDATE:
5757 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5758 		    "qla_target(%d): Async event %#x occurred "
5759 		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5760 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5761 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5762 		break;
5763 
5764 	case MBA_REJECTED_FCP_CMD:
5765 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5766 		    "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5767 		    vha->vp_idx,
5768 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5769 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5770 
5771 		if (le16_to_cpu(mailbox[3]) == 1) {
5772 			/* exchange starvation. */
5773 			vha->hw->exch_starvation++;
5774 			if (vha->hw->exch_starvation > 5) {
5775 				ql_log(ql_log_warn, vha, 0xd03a,
5776 				    "Exchange starvation-. Resetting RISC\n");
5777 
5778 				vha->hw->exch_starvation = 0;
5779 				if (IS_P3P_TYPE(vha->hw))
5780 					set_bit(FCOE_CTX_RESET_NEEDED,
5781 					    &vha->dpc_flags);
5782 				else
5783 					set_bit(ISP_ABORT_NEEDED,
5784 					    &vha->dpc_flags);
5785 				qla2xxx_wake_dpc(vha);
5786 			}
5787 		}
5788 		break;
5789 
5790 	case MBA_PORT_UPDATE:
5791 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5792 		    "qla_target(%d): Port update async event %#x "
5793 		    "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5794 		    "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5795 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5796 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5797 
5798 		login_code = le16_to_cpu(mailbox[2]);
5799 		if (login_code == 0x4) {
5800 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5801 			    "Async MB 2: Got PLOGI Complete\n");
5802 			vha->hw->exch_starvation = 0;
5803 		} else if (login_code == 0x7)
5804 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5805 			    "Async MB 2: Port Logged Out\n");
5806 		break;
5807 	default:
5808 		break;
5809 	}
5810 
5811 }
5812 
5813 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5814 	uint16_t loop_id)
5815 {
5816 	fc_port_t *fcport, *tfcp, *del;
5817 	int rc;
5818 	unsigned long flags;
5819 	u8 newfcport = 0;
5820 
5821 	fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5822 	if (!fcport) {
5823 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5824 		    "qla_target(%d): Allocation of tmp FC port failed",
5825 		    vha->vp_idx);
5826 		return NULL;
5827 	}
5828 
5829 	fcport->loop_id = loop_id;
5830 
5831 	rc = qla24xx_gpdb_wait(vha, fcport, 0);
5832 	if (rc != QLA_SUCCESS) {
5833 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5834 		    "qla_target(%d): Failed to retrieve fcport "
5835 		    "information -- get_port_database() returned %x "
5836 		    "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5837 		kfree(fcport);
5838 		return NULL;
5839 	}
5840 
5841 	del = NULL;
5842 	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5843 	tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5844 
5845 	if (tfcp) {
5846 		tfcp->d_id = fcport->d_id;
5847 		tfcp->port_type = fcport->port_type;
5848 		tfcp->supported_classes = fcport->supported_classes;
5849 		tfcp->flags |= fcport->flags;
5850 		tfcp->scan_state = QLA_FCPORT_FOUND;
5851 
5852 		del = fcport;
5853 		fcport = tfcp;
5854 	} else {
5855 		if (vha->hw->current_topology == ISP_CFG_F)
5856 			fcport->flags |= FCF_FABRIC_DEVICE;
5857 
5858 		list_add_tail(&fcport->list, &vha->vp_fcports);
5859 		if (!IS_SW_RESV_ADDR(fcport->d_id))
5860 		   vha->fcport_count++;
5861 		fcport->login_gen++;
5862 		fcport->disc_state = DSC_LOGIN_COMPLETE;
5863 		fcport->login_succ = 1;
5864 		newfcport = 1;
5865 	}
5866 
5867 	fcport->deleted = 0;
5868 	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5869 
5870 	switch (vha->host->active_mode) {
5871 	case MODE_INITIATOR:
5872 	case MODE_DUAL:
5873 		if (newfcport) {
5874 			if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5875 				ql_dbg(ql_dbg_disc, vha, 0x20fe,
5876 				   "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5877 				   __func__, __LINE__, fcport->port_name, vha->fcport_count);
5878 				qla24xx_post_upd_fcport_work(vha, fcport);
5879 			} else {
5880 				ql_dbg(ql_dbg_disc, vha, 0x20ff,
5881 				   "%s %d %8phC post gpsc fcp_cnt %d\n",
5882 				   __func__, __LINE__, fcport->port_name, vha->fcport_count);
5883 				qla24xx_post_gpsc_work(vha, fcport);
5884 			}
5885 		}
5886 		break;
5887 
5888 	case MODE_TARGET:
5889 	default:
5890 		break;
5891 	}
5892 	if (del)
5893 		qla2x00_free_fcport(del);
5894 
5895 	return fcport;
5896 }
5897 
5898 /* Must be called under tgt_mutex */
5899 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5900 	uint8_t *s_id)
5901 {
5902 	struct fc_port *sess = NULL;
5903 	fc_port_t *fcport = NULL;
5904 	int rc, global_resets;
5905 	uint16_t loop_id = 0;
5906 
5907 	if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5908 		/*
5909 		 * This is Domain Controller, so it should be
5910 		 * OK to drop SCSI commands from it.
5911 		 */
5912 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5913 		    "Unable to find initiator with S_ID %x:%x:%x",
5914 		    s_id[0], s_id[1], s_id[2]);
5915 		return NULL;
5916 	}
5917 
5918 	mutex_lock(&vha->vha_tgt.tgt_mutex);
5919 
5920 retry:
5921 	global_resets =
5922 	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5923 
5924 	rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5925 	if (rc != 0) {
5926 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
5927 
5928 		ql_log(ql_log_info, vha, 0xf071,
5929 		    "qla_target(%d): Unable to find "
5930 		    "initiator with S_ID %x:%x:%x",
5931 		    vha->vp_idx, s_id[0], s_id[1],
5932 		    s_id[2]);
5933 
5934 		if (rc == -ENOENT) {
5935 			qlt_port_logo_t logo;
5936 			sid_to_portid(s_id, &logo.id);
5937 			logo.cmd_count = 1;
5938 			qlt_send_first_logo(vha, &logo);
5939 		}
5940 
5941 		return NULL;
5942 	}
5943 
5944 	fcport = qlt_get_port_database(vha, loop_id);
5945 	if (!fcport) {
5946 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
5947 		return NULL;
5948 	}
5949 
5950 	if (global_resets !=
5951 	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5952 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5953 		    "qla_target(%d): global reset during session discovery "
5954 		    "(counter was %d, new %d), retrying", vha->vp_idx,
5955 		    global_resets,
5956 		    atomic_read(&vha->vha_tgt.
5957 			qla_tgt->tgt_global_resets_count));
5958 		goto retry;
5959 	}
5960 
5961 	sess = qlt_create_sess(vha, fcport, true);
5962 
5963 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
5964 
5965 	return sess;
5966 }
5967 
5968 static void qlt_abort_work(struct qla_tgt *tgt,
5969 	struct qla_tgt_sess_work_param *prm)
5970 {
5971 	struct scsi_qla_host *vha = tgt->vha;
5972 	struct qla_hw_data *ha = vha->hw;
5973 	struct fc_port *sess = NULL;
5974 	unsigned long flags = 0, flags2 = 0;
5975 	uint32_t be_s_id;
5976 	uint8_t s_id[3];
5977 	int rc;
5978 
5979 	spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5980 
5981 	if (tgt->tgt_stop)
5982 		goto out_term2;
5983 
5984 	s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5985 	s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5986 	s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5987 
5988 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5989 	    (unsigned char *)&be_s_id);
5990 	if (!sess) {
5991 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5992 
5993 		sess = qlt_make_local_sess(vha, s_id);
5994 		/* sess has got an extra creation ref */
5995 
5996 		spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5997 		if (!sess)
5998 			goto out_term2;
5999 	} else {
6000 		if (sess->deleted) {
6001 			sess = NULL;
6002 			goto out_term2;
6003 		}
6004 
6005 		if (!kref_get_unless_zero(&sess->sess_kref)) {
6006 			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6007 			    "%s: kref_get fail %8phC \n",
6008 			     __func__, sess->port_name);
6009 			sess = NULL;
6010 			goto out_term2;
6011 		}
6012 	}
6013 
6014 	rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6015 	ha->tgt.tgt_ops->put_sess(sess);
6016 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6017 
6018 	if (rc != 0)
6019 		goto out_term;
6020 	return;
6021 
6022 out_term2:
6023 	if (sess)
6024 		ha->tgt.tgt_ops->put_sess(sess);
6025 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6026 
6027 out_term:
6028 	spin_lock_irqsave(&ha->hardware_lock, flags);
6029 	qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6030 	    FCP_TMF_REJECTED, false);
6031 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6032 }
6033 
6034 static void qlt_tmr_work(struct qla_tgt *tgt,
6035 	struct qla_tgt_sess_work_param *prm)
6036 {
6037 	struct atio_from_isp *a = &prm->tm_iocb2;
6038 	struct scsi_qla_host *vha = tgt->vha;
6039 	struct qla_hw_data *ha = vha->hw;
6040 	struct fc_port *sess = NULL;
6041 	unsigned long flags;
6042 	uint8_t *s_id = NULL; /* to hide compiler warnings */
6043 	int rc;
6044 	u64 unpacked_lun;
6045 	int fn;
6046 	void *iocb;
6047 
6048 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6049 
6050 	if (tgt->tgt_stop)
6051 		goto out_term2;
6052 
6053 	s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6054 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6055 	if (!sess) {
6056 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6057 
6058 		sess = qlt_make_local_sess(vha, s_id);
6059 		/* sess has got an extra creation ref */
6060 
6061 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6062 		if (!sess)
6063 			goto out_term2;
6064 	} else {
6065 		if (sess->deleted) {
6066 			sess = NULL;
6067 			goto out_term2;
6068 		}
6069 
6070 		if (!kref_get_unless_zero(&sess->sess_kref)) {
6071 			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6072 			    "%s: kref_get fail %8phC\n",
6073 			     __func__, sess->port_name);
6074 			sess = NULL;
6075 			goto out_term2;
6076 		}
6077 	}
6078 
6079 	iocb = a;
6080 	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6081 	unpacked_lun =
6082 	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6083 
6084 	rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6085 	ha->tgt.tgt_ops->put_sess(sess);
6086 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6087 
6088 	if (rc != 0)
6089 		goto out_term;
6090 	return;
6091 
6092 out_term2:
6093 	if (sess)
6094 		ha->tgt.tgt_ops->put_sess(sess);
6095 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6096 out_term:
6097 	qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6098 }
6099 
6100 static void qlt_sess_work_fn(struct work_struct *work)
6101 {
6102 	struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6103 	struct scsi_qla_host *vha = tgt->vha;
6104 	unsigned long flags;
6105 
6106 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6107 
6108 	spin_lock_irqsave(&tgt->sess_work_lock, flags);
6109 	while (!list_empty(&tgt->sess_works_list)) {
6110 		struct qla_tgt_sess_work_param *prm = list_entry(
6111 		    tgt->sess_works_list.next, typeof(*prm),
6112 		    sess_works_list_entry);
6113 
6114 		/*
6115 		 * This work can be scheduled on several CPUs at time, so we
6116 		 * must delete the entry to eliminate double processing
6117 		 */
6118 		list_del(&prm->sess_works_list_entry);
6119 
6120 		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6121 
6122 		switch (prm->type) {
6123 		case QLA_TGT_SESS_WORK_ABORT:
6124 			qlt_abort_work(tgt, prm);
6125 			break;
6126 		case QLA_TGT_SESS_WORK_TM:
6127 			qlt_tmr_work(tgt, prm);
6128 			break;
6129 		default:
6130 			BUG_ON(1);
6131 			break;
6132 		}
6133 
6134 		spin_lock_irqsave(&tgt->sess_work_lock, flags);
6135 
6136 		kfree(prm);
6137 	}
6138 	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6139 }
6140 
6141 /* Must be called under tgt_host_action_mutex */
6142 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6143 {
6144 	struct qla_tgt *tgt;
6145 	int rc, i;
6146 	struct qla_qpair_hint *h;
6147 
6148 	if (!QLA_TGT_MODE_ENABLED())
6149 		return 0;
6150 
6151 	if (!IS_TGT_MODE_CAPABLE(ha)) {
6152 		ql_log(ql_log_warn, base_vha, 0xe070,
6153 		    "This adapter does not support target mode.\n");
6154 		return 0;
6155 	}
6156 
6157 	ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6158 	    "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6159 
6160 	BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6161 
6162 	tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6163 	if (!tgt) {
6164 		ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6165 		    "Unable to allocate struct qla_tgt\n");
6166 		return -ENOMEM;
6167 	}
6168 
6169 	tgt->qphints = kzalloc((ha->max_qpairs + 1) *
6170 	    sizeof(struct qla_qpair_hint), GFP_KERNEL);
6171 	if (!tgt->qphints) {
6172 		kfree(tgt);
6173 		ql_log(ql_log_warn, base_vha, 0x0197,
6174 		    "Unable to allocate qpair hints.\n");
6175 		return -ENOMEM;
6176 	}
6177 
6178 	if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6179 		base_vha->host->hostt->supported_mode |= MODE_TARGET;
6180 
6181 	rc = btree_init64(&tgt->lun_qpair_map);
6182 	if (rc) {
6183 		kfree(tgt->qphints);
6184 		kfree(tgt);
6185 		ql_log(ql_log_info, base_vha, 0x0198,
6186 			"Unable to initialize lun_qpair_map btree\n");
6187 		return -EIO;
6188 	}
6189 	h = &tgt->qphints[0];
6190 	h->qpair = ha->base_qpair;
6191 	INIT_LIST_HEAD(&h->hint_elem);
6192 	h->cpuid = ha->base_qpair->cpuid;
6193 	list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6194 
6195 	for (i = 0; i < ha->max_qpairs; i++) {
6196 		unsigned long flags;
6197 
6198 		struct qla_qpair *qpair = ha->queue_pair_map[i];
6199 		h = &tgt->qphints[i + 1];
6200 		INIT_LIST_HEAD(&h->hint_elem);
6201 		if (qpair) {
6202 			h->qpair = qpair;
6203 			spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6204 			list_add_tail(&h->hint_elem, &qpair->hints_list);
6205 			spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6206 			h->cpuid = qpair->cpuid;
6207 		}
6208 	}
6209 
6210 	tgt->ha = ha;
6211 	tgt->vha = base_vha;
6212 	init_waitqueue_head(&tgt->waitQ);
6213 	INIT_LIST_HEAD(&tgt->del_sess_list);
6214 	spin_lock_init(&tgt->sess_work_lock);
6215 	INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6216 	INIT_LIST_HEAD(&tgt->sess_works_list);
6217 	atomic_set(&tgt->tgt_global_resets_count, 0);
6218 
6219 	base_vha->vha_tgt.qla_tgt = tgt;
6220 
6221 	ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6222 		"qla_target(%d): using 64 Bit PCI addressing",
6223 		base_vha->vp_idx);
6224 	/* 3 is reserved */
6225 	tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6226 
6227 	mutex_lock(&qla_tgt_mutex);
6228 	list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6229 	mutex_unlock(&qla_tgt_mutex);
6230 
6231 	if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6232 		ha->tgt.tgt_ops->add_target(base_vha);
6233 
6234 	return 0;
6235 }
6236 
6237 /* Must be called under tgt_host_action_mutex */
6238 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6239 {
6240 	if (!vha->vha_tgt.qla_tgt)
6241 		return 0;
6242 
6243 	if (vha->fc_vport) {
6244 		qlt_release(vha->vha_tgt.qla_tgt);
6245 		return 0;
6246 	}
6247 
6248 	/* free left over qfull cmds */
6249 	qlt_init_term_exchange(vha);
6250 
6251 	ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6252 	    vha->host_no, ha);
6253 	qlt_release(vha->vha_tgt.qla_tgt);
6254 
6255 	return 0;
6256 }
6257 
6258 void qlt_remove_target_resources(struct qla_hw_data *ha)
6259 {
6260 	struct scsi_qla_host *node;
6261 	u32 key = 0;
6262 
6263 	btree_for_each_safe32(&ha->tgt.host_map, key, node)
6264 		btree_remove32(&ha->tgt.host_map, key);
6265 
6266 	btree_destroy32(&ha->tgt.host_map);
6267 }
6268 
6269 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6270 	unsigned char *b)
6271 {
6272 	int i;
6273 
6274 	pr_debug("qla2xxx HW vha->node_name: ");
6275 	for (i = 0; i < WWN_SIZE; i++)
6276 		pr_debug("%02x ", vha->node_name[i]);
6277 	pr_debug("\n");
6278 	pr_debug("qla2xxx HW vha->port_name: ");
6279 	for (i = 0; i < WWN_SIZE; i++)
6280 		pr_debug("%02x ", vha->port_name[i]);
6281 	pr_debug("\n");
6282 
6283 	pr_debug("qla2xxx passed configfs WWPN: ");
6284 	put_unaligned_be64(wwpn, b);
6285 	for (i = 0; i < WWN_SIZE; i++)
6286 		pr_debug("%02x ", b[i]);
6287 	pr_debug("\n");
6288 }
6289 
6290 /**
6291  * qla_tgt_lport_register - register lport with external module
6292  *
6293  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6294  * @phys_wwpn:
6295  * @npiv_wwpn:
6296  * @npiv_wwnn:
6297  * @callback:  lport initialization callback for tcm_qla2xxx code
6298  */
6299 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6300 		       u64 npiv_wwpn, u64 npiv_wwnn,
6301 		       int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6302 {
6303 	struct qla_tgt *tgt;
6304 	struct scsi_qla_host *vha;
6305 	struct qla_hw_data *ha;
6306 	struct Scsi_Host *host;
6307 	unsigned long flags;
6308 	int rc;
6309 	u8 b[WWN_SIZE];
6310 
6311 	mutex_lock(&qla_tgt_mutex);
6312 	list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6313 		vha = tgt->vha;
6314 		ha = vha->hw;
6315 
6316 		host = vha->host;
6317 		if (!host)
6318 			continue;
6319 
6320 		if (!(host->hostt->supported_mode & MODE_TARGET))
6321 			continue;
6322 
6323 		spin_lock_irqsave(&ha->hardware_lock, flags);
6324 		if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6325 			pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6326 			    host->host_no);
6327 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
6328 			continue;
6329 		}
6330 		if (tgt->tgt_stop) {
6331 			pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6332 				 host->host_no);
6333 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
6334 			continue;
6335 		}
6336 		spin_unlock_irqrestore(&ha->hardware_lock, flags);
6337 
6338 		if (!scsi_host_get(host)) {
6339 			ql_dbg(ql_dbg_tgt, vha, 0xe068,
6340 			    "Unable to scsi_host_get() for"
6341 			    " qla2xxx scsi_host\n");
6342 			continue;
6343 		}
6344 		qlt_lport_dump(vha, phys_wwpn, b);
6345 
6346 		if (memcmp(vha->port_name, b, WWN_SIZE)) {
6347 			scsi_host_put(host);
6348 			continue;
6349 		}
6350 		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6351 		if (rc != 0)
6352 			scsi_host_put(host);
6353 
6354 		mutex_unlock(&qla_tgt_mutex);
6355 		return rc;
6356 	}
6357 	mutex_unlock(&qla_tgt_mutex);
6358 
6359 	return -ENODEV;
6360 }
6361 EXPORT_SYMBOL(qlt_lport_register);
6362 
6363 /**
6364  * qla_tgt_lport_deregister - Degister lport
6365  *
6366  * @vha:  Registered scsi_qla_host pointer
6367  */
6368 void qlt_lport_deregister(struct scsi_qla_host *vha)
6369 {
6370 	struct qla_hw_data *ha = vha->hw;
6371 	struct Scsi_Host *sh = vha->host;
6372 	/*
6373 	 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6374 	 */
6375 	vha->vha_tgt.target_lport_ptr = NULL;
6376 	ha->tgt.tgt_ops = NULL;
6377 	/*
6378 	 * Release the Scsi_Host reference for the underlying qla2xxx host
6379 	 */
6380 	scsi_host_put(sh);
6381 }
6382 EXPORT_SYMBOL(qlt_lport_deregister);
6383 
6384 /* Must be called under HW lock */
6385 static void qlt_set_mode(struct scsi_qla_host *vha)
6386 {
6387 	switch (ql2x_ini_mode) {
6388 	case QLA2XXX_INI_MODE_DISABLED:
6389 	case QLA2XXX_INI_MODE_EXCLUSIVE:
6390 		vha->host->active_mode = MODE_TARGET;
6391 		break;
6392 	case QLA2XXX_INI_MODE_ENABLED:
6393 		vha->host->active_mode = MODE_UNKNOWN;
6394 		break;
6395 	case QLA2XXX_INI_MODE_DUAL:
6396 		vha->host->active_mode = MODE_DUAL;
6397 		break;
6398 	default:
6399 		break;
6400 	}
6401 }
6402 
6403 /* Must be called under HW lock */
6404 static void qlt_clear_mode(struct scsi_qla_host *vha)
6405 {
6406 	switch (ql2x_ini_mode) {
6407 	case QLA2XXX_INI_MODE_DISABLED:
6408 		vha->host->active_mode = MODE_UNKNOWN;
6409 		break;
6410 	case QLA2XXX_INI_MODE_EXCLUSIVE:
6411 		vha->host->active_mode = MODE_INITIATOR;
6412 		break;
6413 	case QLA2XXX_INI_MODE_ENABLED:
6414 	case QLA2XXX_INI_MODE_DUAL:
6415 		vha->host->active_mode = MODE_INITIATOR;
6416 		break;
6417 	default:
6418 		break;
6419 	}
6420 }
6421 
6422 /*
6423  * qla_tgt_enable_vha - NO LOCK HELD
6424  *
6425  * host_reset, bring up w/ Target Mode Enabled
6426  */
6427 void
6428 qlt_enable_vha(struct scsi_qla_host *vha)
6429 {
6430 	struct qla_hw_data *ha = vha->hw;
6431 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6432 	unsigned long flags;
6433 	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6434 
6435 	if (!tgt) {
6436 		ql_dbg(ql_dbg_tgt, vha, 0xe069,
6437 		    "Unable to locate qla_tgt pointer from"
6438 		    " struct qla_hw_data\n");
6439 		dump_stack();
6440 		return;
6441 	}
6442 
6443 	spin_lock_irqsave(&ha->hardware_lock, flags);
6444 	tgt->tgt_stopped = 0;
6445 	qlt_set_mode(vha);
6446 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6447 
6448 	if (vha->vp_idx) {
6449 		qla24xx_disable_vp(vha);
6450 		qla24xx_enable_vp(vha);
6451 	} else {
6452 		set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6453 		qla2xxx_wake_dpc(base_vha);
6454 		qla2x00_wait_for_hba_online(base_vha);
6455 	}
6456 }
6457 EXPORT_SYMBOL(qlt_enable_vha);
6458 
6459 /*
6460  * qla_tgt_disable_vha - NO LOCK HELD
6461  *
6462  * Disable Target Mode and reset the adapter
6463  */
6464 static void qlt_disable_vha(struct scsi_qla_host *vha)
6465 {
6466 	struct qla_hw_data *ha = vha->hw;
6467 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6468 	unsigned long flags;
6469 
6470 	if (!tgt) {
6471 		ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6472 		    "Unable to locate qla_tgt pointer from"
6473 		    " struct qla_hw_data\n");
6474 		dump_stack();
6475 		return;
6476 	}
6477 
6478 	spin_lock_irqsave(&ha->hardware_lock, flags);
6479 	qlt_clear_mode(vha);
6480 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6481 
6482 	set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6483 	qla2xxx_wake_dpc(vha);
6484 	qla2x00_wait_for_hba_online(vha);
6485 }
6486 
6487 /*
6488  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6489  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6490  * members.
6491  */
6492 void
6493 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6494 {
6495 	vha->vha_tgt.qla_tgt = NULL;
6496 
6497 	mutex_init(&vha->vha_tgt.tgt_mutex);
6498 	mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6499 
6500 	qlt_clear_mode(vha);
6501 
6502 	/*
6503 	 * NOTE: Currently the value is kept the same for <24xx and
6504 	 * >=24xx ISPs. If it is necessary to change it,
6505 	 * the check should be added for specific ISPs,
6506 	 * assigning the value appropriately.
6507 	 */
6508 	ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6509 
6510 	qlt_add_target(ha, vha);
6511 }
6512 
6513 u8
6514 qlt_rff_id(struct scsi_qla_host *vha)
6515 {
6516 	u8 fc4_feature = 0;
6517 	/*
6518 	 * FC-4 Feature bit 0 indicates target functionality to the name server.
6519 	 */
6520 	if (qla_tgt_mode_enabled(vha)) {
6521 		fc4_feature = BIT_0;
6522 	} else if (qla_ini_mode_enabled(vha)) {
6523 		fc4_feature = BIT_1;
6524 	} else if (qla_dual_mode_enabled(vha))
6525 		fc4_feature = BIT_0 | BIT_1;
6526 
6527 	return fc4_feature;
6528 }
6529 
6530 /*
6531  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6532  * @ha: HA context
6533  *
6534  * Beginning of ATIO ring has initialization control block already built
6535  * by nvram config routine.
6536  *
6537  * Returns 0 on success.
6538  */
6539 void
6540 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6541 {
6542 	struct qla_hw_data *ha = vha->hw;
6543 	uint16_t cnt;
6544 	struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6545 
6546 	if (qla_ini_mode_enabled(vha))
6547 		return;
6548 
6549 	for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6550 		pkt->u.raw.signature = ATIO_PROCESSED;
6551 		pkt++;
6552 	}
6553 
6554 }
6555 
6556 /*
6557  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6558  * @ha: SCSI driver HA context
6559  */
6560 void
6561 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6562 {
6563 	struct qla_hw_data *ha = vha->hw;
6564 	struct atio_from_isp *pkt;
6565 	int cnt, i;
6566 
6567 	if (!ha->flags.fw_started)
6568 		return;
6569 
6570 	while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6571 	    fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6572 		pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6573 		cnt = pkt->u.raw.entry_count;
6574 
6575 		if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6576 			/*
6577 			 * This packet is corrupted. The header + payload
6578 			 * can not be trusted. There is no point in passing
6579 			 * it further up.
6580 			 */
6581 			ql_log(ql_log_warn, vha, 0xd03c,
6582 			    "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6583 			    pkt->u.isp24.fcp_hdr.s_id,
6584 			    be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6585 			    le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6586 
6587 			adjust_corrupted_atio(pkt);
6588 			qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6589 			    ha_locked, 0);
6590 		} else {
6591 			qlt_24xx_atio_pkt_all_vps(vha,
6592 			    (struct atio_from_isp *)pkt, ha_locked);
6593 		}
6594 
6595 		for (i = 0; i < cnt; i++) {
6596 			ha->tgt.atio_ring_index++;
6597 			if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6598 				ha->tgt.atio_ring_index = 0;
6599 				ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6600 			} else
6601 				ha->tgt.atio_ring_ptr++;
6602 
6603 			pkt->u.raw.signature = ATIO_PROCESSED;
6604 			pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6605 		}
6606 		wmb();
6607 	}
6608 
6609 	/* Adjust ring index */
6610 	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6611 }
6612 
6613 void
6614 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6615 {
6616 	struct qla_hw_data *ha = vha->hw;
6617 	struct qla_msix_entry *msix = &ha->msix_entries[2];
6618 	struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6619 
6620 	if (!QLA_TGT_MODE_ENABLED())
6621 		return;
6622 
6623 	WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6624 	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6625 	RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6626 
6627 	if (ha->flags.msix_enabled) {
6628 		if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6629 			if (IS_QLA2071(ha)) {
6630 				/* 4 ports Baker: Enable Interrupt Handshake */
6631 				icb->msix_atio = 0;
6632 				icb->firmware_options_2 |= BIT_26;
6633 			} else {
6634 				icb->msix_atio = cpu_to_le16(msix->entry);
6635 				icb->firmware_options_2 &= ~BIT_26;
6636 			}
6637 			ql_dbg(ql_dbg_init, vha, 0xf072,
6638 			    "Registering ICB vector 0x%x for atio que.\n",
6639 			    msix->entry);
6640 		}
6641 	} else {
6642 		/* INTx|MSI */
6643 		if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6644 			icb->msix_atio = 0;
6645 			icb->firmware_options_2 |= BIT_26;
6646 			ql_dbg(ql_dbg_init, vha, 0xf072,
6647 			    "%s: Use INTx for ATIOQ.\n", __func__);
6648 		}
6649 	}
6650 }
6651 
6652 void
6653 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6654 {
6655 	struct qla_hw_data *ha = vha->hw;
6656 	u32 tmp;
6657 
6658 	if (!QLA_TGT_MODE_ENABLED())
6659 		return;
6660 
6661 	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6662 		if (!ha->tgt.saved_set) {
6663 			/* We save only once */
6664 			ha->tgt.saved_exchange_count = nv->exchange_count;
6665 			ha->tgt.saved_firmware_options_1 =
6666 			    nv->firmware_options_1;
6667 			ha->tgt.saved_firmware_options_2 =
6668 			    nv->firmware_options_2;
6669 			ha->tgt.saved_firmware_options_3 =
6670 			    nv->firmware_options_3;
6671 			ha->tgt.saved_set = 1;
6672 		}
6673 
6674 		if (qla_tgt_mode_enabled(vha))
6675 			nv->exchange_count = cpu_to_le16(0xFFFF);
6676 		else			/* dual */
6677 			nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6678 
6679 		/* Enable target mode */
6680 		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6681 
6682 		/* Disable ini mode, if requested */
6683 		if (qla_tgt_mode_enabled(vha))
6684 			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6685 
6686 		/* Disable Full Login after LIP */
6687 		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6688 		/* Enable initial LIP */
6689 		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6690 		if (ql2xtgt_tape_enable)
6691 			/* Enable FC Tape support */
6692 			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6693 		else
6694 			/* Disable FC Tape support */
6695 			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6696 
6697 		/* Disable Full Login after LIP */
6698 		nv->host_p &= cpu_to_le32(~BIT_10);
6699 
6700 		/*
6701 		 * clear BIT 15 explicitly as we have seen at least
6702 		 * a couple of instances where this was set and this
6703 		 * was causing the firmware to not be initialized.
6704 		 */
6705 		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6706 		/* Enable target PRLI control */
6707 		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6708 
6709 		if (IS_QLA25XX(ha)) {
6710 			/* Change Loop-prefer to Pt-Pt */
6711 			tmp = ~(BIT_4|BIT_5|BIT_6);
6712 			nv->firmware_options_2 &= cpu_to_le32(tmp);
6713 			tmp = P2P << 4;
6714 			nv->firmware_options_2 |= cpu_to_le32(tmp);
6715 		}
6716 	} else {
6717 		if (ha->tgt.saved_set) {
6718 			nv->exchange_count = ha->tgt.saved_exchange_count;
6719 			nv->firmware_options_1 =
6720 			    ha->tgt.saved_firmware_options_1;
6721 			nv->firmware_options_2 =
6722 			    ha->tgt.saved_firmware_options_2;
6723 			nv->firmware_options_3 =
6724 			    ha->tgt.saved_firmware_options_3;
6725 		}
6726 		return;
6727 	}
6728 
6729 	if (ha->base_qpair->enable_class_2) {
6730 		if (vha->flags.init_done)
6731 			fc_host_supported_classes(vha->host) =
6732 				FC_COS_CLASS2 | FC_COS_CLASS3;
6733 
6734 		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6735 	} else {
6736 		if (vha->flags.init_done)
6737 			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6738 
6739 		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6740 	}
6741 }
6742 
6743 void
6744 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6745 	struct init_cb_24xx *icb)
6746 {
6747 	struct qla_hw_data *ha = vha->hw;
6748 
6749 	if (!QLA_TGT_MODE_ENABLED())
6750 		return;
6751 
6752 	if (ha->tgt.node_name_set) {
6753 		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6754 		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6755 	}
6756 
6757 	/* disable ZIO at start time. */
6758 	if (!vha->flags.init_done) {
6759 		uint32_t tmp;
6760 		tmp = le32_to_cpu(icb->firmware_options_2);
6761 		tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6762 		icb->firmware_options_2 = cpu_to_le32(tmp);
6763 	}
6764 }
6765 
6766 void
6767 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6768 {
6769 	struct qla_hw_data *ha = vha->hw;
6770 	u32 tmp;
6771 
6772 	if (!QLA_TGT_MODE_ENABLED())
6773 		return;
6774 
6775 	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6776 		if (!ha->tgt.saved_set) {
6777 			/* We save only once */
6778 			ha->tgt.saved_exchange_count = nv->exchange_count;
6779 			ha->tgt.saved_firmware_options_1 =
6780 			    nv->firmware_options_1;
6781 			ha->tgt.saved_firmware_options_2 =
6782 			    nv->firmware_options_2;
6783 			ha->tgt.saved_firmware_options_3 =
6784 			    nv->firmware_options_3;
6785 			ha->tgt.saved_set = 1;
6786 		}
6787 
6788 		if (qla_tgt_mode_enabled(vha))
6789 			nv->exchange_count = cpu_to_le16(0xFFFF);
6790 		else			/* dual */
6791 			nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6792 
6793 		/* Enable target mode */
6794 		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6795 
6796 		/* Disable ini mode, if requested */
6797 		if (qla_tgt_mode_enabled(vha))
6798 			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6799 		/* Disable Full Login after LIP */
6800 		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6801 		/* Enable initial LIP */
6802 		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6803 		/*
6804 		 * clear BIT 15 explicitly as we have seen at
6805 		 * least a couple of instances where this was set
6806 		 * and this was causing the firmware to not be
6807 		 * initialized.
6808 		 */
6809 		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6810 		if (ql2xtgt_tape_enable)
6811 			/* Enable FC tape support */
6812 			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6813 		else
6814 			/* Disable FC tape support */
6815 			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6816 
6817 		/* Disable Full Login after LIP */
6818 		nv->host_p &= cpu_to_le32(~BIT_10);
6819 		/* Enable target PRLI control */
6820 		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6821 
6822 		/* Change Loop-prefer to Pt-Pt */
6823 		tmp = ~(BIT_4|BIT_5|BIT_6);
6824 		nv->firmware_options_2 &= cpu_to_le32(tmp);
6825 		tmp = P2P << 4;
6826 		nv->firmware_options_2 |= cpu_to_le32(tmp);
6827 	} else {
6828 		if (ha->tgt.saved_set) {
6829 			nv->exchange_count = ha->tgt.saved_exchange_count;
6830 			nv->firmware_options_1 =
6831 			    ha->tgt.saved_firmware_options_1;
6832 			nv->firmware_options_2 =
6833 			    ha->tgt.saved_firmware_options_2;
6834 			nv->firmware_options_3 =
6835 			    ha->tgt.saved_firmware_options_3;
6836 		}
6837 		return;
6838 	}
6839 
6840 	if (ha->base_qpair->enable_class_2) {
6841 		if (vha->flags.init_done)
6842 			fc_host_supported_classes(vha->host) =
6843 				FC_COS_CLASS2 | FC_COS_CLASS3;
6844 
6845 		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6846 	} else {
6847 		if (vha->flags.init_done)
6848 			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6849 
6850 		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6851 	}
6852 }
6853 
6854 void
6855 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6856 	struct init_cb_81xx *icb)
6857 {
6858 	struct qla_hw_data *ha = vha->hw;
6859 
6860 	if (!QLA_TGT_MODE_ENABLED())
6861 		return;
6862 
6863 	if (ha->tgt.node_name_set) {
6864 		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6865 		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6866 	}
6867 
6868 	/* disable ZIO at start time. */
6869 	if (!vha->flags.init_done) {
6870 		uint32_t tmp;
6871 		tmp = le32_to_cpu(icb->firmware_options_2);
6872 		tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6873 		icb->firmware_options_2 = cpu_to_le32(tmp);
6874 	}
6875 
6876 }
6877 
6878 void
6879 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6880 {
6881 	if (!QLA_TGT_MODE_ENABLED())
6882 		return;
6883 
6884 	ha->msix_count += 1; /* For ATIO Q */
6885 }
6886 
6887 
6888 void
6889 qlt_modify_vp_config(struct scsi_qla_host *vha,
6890 	struct vp_config_entry_24xx *vpmod)
6891 {
6892 	/* enable target mode.  Bit5 = 1 => disable */
6893 	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6894 		vpmod->options_idx1 &= ~BIT_5;
6895 
6896 	/* Disable ini mode, if requested.  bit4 = 1 => disable */
6897 	if (qla_tgt_mode_enabled(vha))
6898 		vpmod->options_idx1 &= ~BIT_4;
6899 }
6900 
6901 void
6902 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6903 {
6904 	int rc;
6905 
6906 	if (!QLA_TGT_MODE_ENABLED())
6907 		return;
6908 
6909 	if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6910 		ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6911 		ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6912 	} else {
6913 		ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6914 		ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6915 	}
6916 
6917 	mutex_init(&base_vha->vha_tgt.tgt_mutex);
6918 	mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6919 
6920 	INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6921 	INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6922 	    qlt_unknown_atio_work_fn);
6923 
6924 	qlt_clear_mode(base_vha);
6925 
6926 	rc = btree_init32(&ha->tgt.host_map);
6927 	if (rc)
6928 		ql_log(ql_log_info, base_vha, 0xd03d,
6929 		    "Unable to initialize ha->host_map btree\n");
6930 
6931 	qlt_update_vp_map(base_vha, SET_VP_IDX);
6932 }
6933 
6934 irqreturn_t
6935 qla83xx_msix_atio_q(int irq, void *dev_id)
6936 {
6937 	struct rsp_que *rsp;
6938 	scsi_qla_host_t	*vha;
6939 	struct qla_hw_data *ha;
6940 	unsigned long flags;
6941 
6942 	rsp = (struct rsp_que *) dev_id;
6943 	ha = rsp->hw;
6944 	vha = pci_get_drvdata(ha->pdev);
6945 
6946 	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6947 
6948 	qlt_24xx_process_atio_queue(vha, 0);
6949 
6950 	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6951 
6952 	return IRQ_HANDLED;
6953 }
6954 
6955 static void
6956 qlt_handle_abts_recv_work(struct work_struct *work)
6957 {
6958 	struct qla_tgt_sess_op *op = container_of(work,
6959 		struct qla_tgt_sess_op, work);
6960 	scsi_qla_host_t *vha = op->vha;
6961 	struct qla_hw_data *ha = vha->hw;
6962 	unsigned long flags;
6963 
6964 	if (qla2x00_reset_active(vha) ||
6965 	    (op->chip_reset != ha->base_qpair->chip_reset))
6966 		return;
6967 
6968 	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6969 	qlt_24xx_process_atio_queue(vha, 0);
6970 	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6971 
6972 	spin_lock_irqsave(&ha->hardware_lock, flags);
6973 	qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
6974 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6975 
6976 	kfree(op);
6977 }
6978 
6979 void
6980 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
6981     response_t *pkt)
6982 {
6983 	struct qla_tgt_sess_op *op;
6984 
6985 	op = kzalloc(sizeof(*op), GFP_ATOMIC);
6986 
6987 	if (!op) {
6988 		/* do not reach for ATIO queue here.  This is best effort err
6989 		 * recovery at this point.
6990 		 */
6991 		qlt_response_pkt_all_vps(vha, rsp, pkt);
6992 		return;
6993 	}
6994 
6995 	memcpy(&op->atio, pkt, sizeof(*pkt));
6996 	op->vha = vha;
6997 	op->chip_reset = vha->hw->base_qpair->chip_reset;
6998 	op->rsp = rsp;
6999 	INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7000 	queue_work(qla_tgt_wq, &op->work);
7001 	return;
7002 }
7003 
7004 int
7005 qlt_mem_alloc(struct qla_hw_data *ha)
7006 {
7007 	if (!QLA_TGT_MODE_ENABLED())
7008 		return 0;
7009 
7010 	ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
7011 	    MAX_MULTI_ID_FABRIC, GFP_KERNEL);
7012 	if (!ha->tgt.tgt_vp_map)
7013 		return -ENOMEM;
7014 
7015 	ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7016 	    (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7017 	    &ha->tgt.atio_dma, GFP_KERNEL);
7018 	if (!ha->tgt.atio_ring) {
7019 		kfree(ha->tgt.tgt_vp_map);
7020 		return -ENOMEM;
7021 	}
7022 	return 0;
7023 }
7024 
7025 void
7026 qlt_mem_free(struct qla_hw_data *ha)
7027 {
7028 	if (!QLA_TGT_MODE_ENABLED())
7029 		return;
7030 
7031 	if (ha->tgt.atio_ring) {
7032 		dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7033 		    sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7034 		    ha->tgt.atio_dma);
7035 	}
7036 	kfree(ha->tgt.tgt_vp_map);
7037 }
7038 
7039 /* vport_slock to be held by the caller */
7040 void
7041 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7042 {
7043 	void *slot;
7044 	u32 key;
7045 	int rc;
7046 
7047 	if (!QLA_TGT_MODE_ENABLED())
7048 		return;
7049 
7050 	key = vha->d_id.b24;
7051 
7052 	switch (cmd) {
7053 	case SET_VP_IDX:
7054 		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7055 		break;
7056 	case SET_AL_PA:
7057 		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7058 		if (!slot) {
7059 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7060 			    "Save vha in host_map %p %06x\n", vha, key);
7061 			rc = btree_insert32(&vha->hw->tgt.host_map,
7062 				key, vha, GFP_ATOMIC);
7063 			if (rc)
7064 				ql_log(ql_log_info, vha, 0xd03e,
7065 				    "Unable to insert s_id into host_map: %06x\n",
7066 				    key);
7067 			return;
7068 		}
7069 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7070 		    "replace existing vha in host_map %p %06x\n", vha, key);
7071 		btree_update32(&vha->hw->tgt.host_map, key, vha);
7072 		break;
7073 	case RESET_VP_IDX:
7074 		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7075 		break;
7076 	case RESET_AL_PA:
7077 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7078 		   "clear vha in host_map %p %06x\n", vha, key);
7079 		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7080 		if (slot)
7081 			btree_remove32(&vha->hw->tgt.host_map, key);
7082 		vha->d_id.b24 = 0;
7083 		break;
7084 	}
7085 }
7086 
7087 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7088 {
7089 
7090 	if (!vha->d_id.b24) {
7091 		vha->d_id = id;
7092 		qlt_update_vp_map(vha, SET_AL_PA);
7093 	} else if (vha->d_id.b24 != id.b24) {
7094 		qlt_update_vp_map(vha, RESET_AL_PA);
7095 		vha->d_id = id;
7096 		qlt_update_vp_map(vha, SET_AL_PA);
7097 	}
7098 }
7099 
7100 static int __init qlt_parse_ini_mode(void)
7101 {
7102 	if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7103 		ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7104 	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7105 		ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7106 	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7107 		ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7108 	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7109 		ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7110 	else
7111 		return false;
7112 
7113 	return true;
7114 }
7115 
7116 int __init qlt_init(void)
7117 {
7118 	int ret;
7119 
7120 	if (!qlt_parse_ini_mode()) {
7121 		ql_log(ql_log_fatal, NULL, 0xe06b,
7122 		    "qlt_parse_ini_mode() failed\n");
7123 		return -EINVAL;
7124 	}
7125 
7126 	if (!QLA_TGT_MODE_ENABLED())
7127 		return 0;
7128 
7129 	qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7130 	    sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7131 	    qla_tgt_mgmt_cmd), 0, NULL);
7132 	if (!qla_tgt_mgmt_cmd_cachep) {
7133 		ql_log(ql_log_fatal, NULL, 0xd04b,
7134 		    "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7135 		return -ENOMEM;
7136 	}
7137 
7138 	qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7139 	    sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7140 	    0, NULL);
7141 
7142 	if (!qla_tgt_plogi_cachep) {
7143 		ql_log(ql_log_fatal, NULL, 0xe06d,
7144 		    "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7145 		ret = -ENOMEM;
7146 		goto out_mgmt_cmd_cachep;
7147 	}
7148 
7149 	qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7150 	    mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7151 	if (!qla_tgt_mgmt_cmd_mempool) {
7152 		ql_log(ql_log_fatal, NULL, 0xe06e,
7153 		    "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7154 		ret = -ENOMEM;
7155 		goto out_plogi_cachep;
7156 	}
7157 
7158 	qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7159 	if (!qla_tgt_wq) {
7160 		ql_log(ql_log_fatal, NULL, 0xe06f,
7161 		    "alloc_workqueue for qla_tgt_wq failed\n");
7162 		ret = -ENOMEM;
7163 		goto out_cmd_mempool;
7164 	}
7165 	/*
7166 	 * Return 1 to signal that initiator-mode is being disabled
7167 	 */
7168 	return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7169 
7170 out_cmd_mempool:
7171 	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7172 out_plogi_cachep:
7173 	kmem_cache_destroy(qla_tgt_plogi_cachep);
7174 out_mgmt_cmd_cachep:
7175 	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7176 	return ret;
7177 }
7178 
7179 void qlt_exit(void)
7180 {
7181 	if (!QLA_TGT_MODE_ENABLED())
7182 		return;
7183 
7184 	destroy_workqueue(qla_tgt_wq);
7185 	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7186 	kmem_cache_destroy(qla_tgt_plogi_cachep);
7187 	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7188 }
7189