1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
4  *
5  *  based on qla2x00t.c code:
6  *
7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
11  *
12  *  Forward port and refactoring to modern qla2xxx and target/configfs
13  *
14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
15  */
16 
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/types.h>
20 #include <linux/blkdev.h>
21 #include <linux/interrupt.h>
22 #include <linux/pci.h>
23 #include <linux/delay.h>
24 #include <linux/list.h>
25 #include <linux/workqueue.h>
26 #include <asm/unaligned.h>
27 #include <scsi/scsi.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_tcq.h>
30 #include <target/target_core_base.h>
31 #include <target/target_core_fabric.h>
32 
33 #include "qla_def.h"
34 #include "qla_target.h"
35 
36 static int ql2xtgt_tape_enable;
37 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
38 MODULE_PARM_DESC(ql2xtgt_tape_enable,
39 		"Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
40 
41 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
42 module_param(qlini_mode, charp, S_IRUGO);
43 MODULE_PARM_DESC(qlini_mode,
44 	"Determines when initiator mode will be enabled. Possible values: "
45 	"\"exclusive\" - initiator mode will be enabled on load, "
46 	"disabled on enabling target mode and then on disabling target mode "
47 	"enabled back; "
48 	"\"disabled\" - initiator mode will never be enabled; "
49 	"\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
50 	"when ready "
51 	"\"enabled\" (default) - initiator mode will always stay enabled.");
52 
53 static int ql_dm_tgt_ex_pct = 0;
54 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
55 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
56 	"For Dual Mode (qlini_mode=dual), this parameter determines "
57 	"the percentage of exchanges/cmds FW will allocate resources "
58 	"for Target mode.");
59 
60 int ql2xuctrlirq = 1;
61 module_param(ql2xuctrlirq, int, 0644);
62 MODULE_PARM_DESC(ql2xuctrlirq,
63     "User to control IRQ placement via smp_affinity."
64     "Valid with qlini_mode=disabled."
65     "1(default): enable");
66 
67 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
68 
69 static int qla_sam_status = SAM_STAT_BUSY;
70 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
71 
72 /*
73  * From scsi/fc/fc_fcp.h
74  */
75 enum fcp_resp_rsp_codes {
76 	FCP_TMF_CMPL = 0,
77 	FCP_DATA_LEN_INVALID = 1,
78 	FCP_CMND_FIELDS_INVALID = 2,
79 	FCP_DATA_PARAM_MISMATCH = 3,
80 	FCP_TMF_REJECTED = 4,
81 	FCP_TMF_FAILED = 5,
82 	FCP_TMF_INVALID_LUN = 9,
83 };
84 
85 /*
86  * fc_pri_ta from scsi/fc/fc_fcp.h
87  */
88 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
89 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
90 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
91 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
92 #define FCP_PTA_MASK        7   /* mask for task attribute field */
93 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
94 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
95 
96 /*
97  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
98  * must be called under HW lock and could unlock/lock it inside.
99  * It isn't an issue, since in the current implementation on the time when
100  * those functions are called:
101  *
102  *   - Either context is IRQ and only IRQ handler can modify HW data,
103  *     including rings related fields,
104  *
105  *   - Or access to target mode variables from struct qla_tgt doesn't
106  *     cross those functions boundaries, except tgt_stop, which
107  *     additionally protected by irq_cmd_count.
108  */
109 /* Predefs for callbacks handed to qla2xxx LLD */
110 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
111 	struct atio_from_isp *pkt, uint8_t);
112 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
113 	response_t *pkt);
114 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
115 	int fn, void *iocb, int flags);
116 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
117 	*cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
118 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
119 	struct atio_from_isp *atio, uint16_t status, int qfull);
120 static void qlt_disable_vha(struct scsi_qla_host *vha);
121 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
122 static void qlt_send_notify_ack(struct qla_qpair *qpair,
123 	struct imm_ntfy_from_isp *ntfy,
124 	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
125 	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
126 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
127 	struct imm_ntfy_from_isp *imm, int ha_locked);
128 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
129 	fc_port_t *fcport, bool local);
130 void qlt_unreg_sess(struct fc_port *sess);
131 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
132 	struct abts_recv_from_24xx *);
133 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
134     uint16_t);
135 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
136 static inline uint32_t qlt_make_handle(struct qla_qpair *);
137 
138 /*
139  * Global Variables
140  */
141 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
142 struct kmem_cache *qla_tgt_plogi_cachep;
143 static mempool_t *qla_tgt_mgmt_cmd_mempool;
144 static struct workqueue_struct *qla_tgt_wq;
145 static DEFINE_MUTEX(qla_tgt_mutex);
146 static LIST_HEAD(qla_tgt_glist);
147 
148 static const char *prot_op_str(u32 prot_op)
149 {
150 	switch (prot_op) {
151 	case TARGET_PROT_NORMAL:	return "NORMAL";
152 	case TARGET_PROT_DIN_INSERT:	return "DIN_INSERT";
153 	case TARGET_PROT_DOUT_INSERT:	return "DOUT_INSERT";
154 	case TARGET_PROT_DIN_STRIP:	return "DIN_STRIP";
155 	case TARGET_PROT_DOUT_STRIP:	return "DOUT_STRIP";
156 	case TARGET_PROT_DIN_PASS:	return "DIN_PASS";
157 	case TARGET_PROT_DOUT_PASS:	return "DOUT_PASS";
158 	default:			return "UNKNOWN";
159 	}
160 }
161 
162 /* This API intentionally takes dest as a parameter, rather than returning
163  * int value to avoid caller forgetting to issue wmb() after the store */
164 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
165 {
166 	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
167 	*dest = atomic_inc_return(&base_vha->generation_tick);
168 	/* memory barrier */
169 	wmb();
170 }
171 
172 /* Might release hw lock, then reaquire!! */
173 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
174 {
175 	/* Send marker if required */
176 	if (unlikely(vha->marker_needed != 0)) {
177 		int rc = qla2x00_issue_marker(vha, vha_locked);
178 
179 		if (rc != QLA_SUCCESS) {
180 			ql_dbg(ql_dbg_tgt, vha, 0xe03d,
181 			    "qla_target(%d): issue_marker() failed\n",
182 			    vha->vp_idx);
183 		}
184 		return rc;
185 	}
186 	return QLA_SUCCESS;
187 }
188 
189 static inline
190 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
191 					    be_id_t d_id)
192 {
193 	struct scsi_qla_host *host;
194 	uint32_t key;
195 
196 	if (vha->d_id.b.area == d_id.area &&
197 	    vha->d_id.b.domain == d_id.domain &&
198 	    vha->d_id.b.al_pa == d_id.al_pa)
199 		return vha;
200 
201 	key = be_to_port_id(d_id).b24;
202 
203 	host = btree_lookup32(&vha->hw->tgt.host_map, key);
204 	if (!host)
205 		ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
206 		    "Unable to find host %06x\n", key);
207 
208 	return host;
209 }
210 
211 static inline
212 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
213 	uint16_t vp_idx)
214 {
215 	struct qla_hw_data *ha = vha->hw;
216 
217 	if (vha->vp_idx == vp_idx)
218 		return vha;
219 
220 	BUG_ON(ha->tgt.tgt_vp_map == NULL);
221 	if (likely(test_bit(vp_idx, ha->vp_idx_map)))
222 		return ha->tgt.tgt_vp_map[vp_idx].vha;
223 
224 	return NULL;
225 }
226 
227 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
228 {
229 	unsigned long flags;
230 
231 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
232 
233 	vha->hw->tgt.num_pend_cmds++;
234 	if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
235 		vha->qla_stats.stat_max_pend_cmds =
236 			vha->hw->tgt.num_pend_cmds;
237 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
238 }
239 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
240 {
241 	unsigned long flags;
242 
243 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
244 	vha->hw->tgt.num_pend_cmds--;
245 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
246 }
247 
248 
249 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
250 	struct atio_from_isp *atio, uint8_t ha_locked)
251 {
252 	struct qla_tgt_sess_op *u;
253 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
254 	unsigned long flags;
255 
256 	if (tgt->tgt_stop) {
257 		ql_dbg(ql_dbg_async, vha, 0x502c,
258 		    "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
259 		    vha->vp_idx);
260 		goto out_term;
261 	}
262 
263 	u = kzalloc(sizeof(*u), GFP_ATOMIC);
264 	if (u == NULL)
265 		goto out_term;
266 
267 	u->vha = vha;
268 	memcpy(&u->atio, atio, sizeof(*atio));
269 	INIT_LIST_HEAD(&u->cmd_list);
270 
271 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
272 	list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
273 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
274 
275 	schedule_delayed_work(&vha->unknown_atio_work, 1);
276 
277 out:
278 	return;
279 
280 out_term:
281 	qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
282 	goto out;
283 }
284 
285 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
286 	uint8_t ha_locked)
287 {
288 	struct qla_tgt_sess_op *u, *t;
289 	scsi_qla_host_t *host;
290 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
291 	unsigned long flags;
292 	uint8_t queued = 0;
293 
294 	list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
295 		if (u->aborted) {
296 			ql_dbg(ql_dbg_async, vha, 0x502e,
297 			    "Freeing unknown %s %p, because of Abort\n",
298 			    "ATIO_TYPE7", u);
299 			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
300 			    &u->atio, ha_locked, 0);
301 			goto abort;
302 		}
303 
304 		host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
305 		if (host != NULL) {
306 			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
307 			    "Requeuing unknown ATIO_TYPE7 %p\n", u);
308 			qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
309 		} else if (tgt->tgt_stop) {
310 			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
311 			    "Freeing unknown %s %p, because tgt is being stopped\n",
312 			    "ATIO_TYPE7", u);
313 			qlt_send_term_exchange(vha->hw->base_qpair, NULL,
314 			    &u->atio, ha_locked, 0);
315 		} else {
316 			ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
317 			    "Reschedule u %p, vha %p, host %p\n", u, vha, host);
318 			if (!queued) {
319 				queued = 1;
320 				schedule_delayed_work(&vha->unknown_atio_work,
321 				    1);
322 			}
323 			continue;
324 		}
325 
326 abort:
327 		spin_lock_irqsave(&vha->cmd_list_lock, flags);
328 		list_del(&u->cmd_list);
329 		spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
330 		kfree(u);
331 	}
332 }
333 
334 void qlt_unknown_atio_work_fn(struct work_struct *work)
335 {
336 	struct scsi_qla_host *vha = container_of(to_delayed_work(work),
337 	    struct scsi_qla_host, unknown_atio_work);
338 
339 	qlt_try_to_dequeue_unknown_atios(vha, 0);
340 }
341 
342 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
343 	struct atio_from_isp *atio, uint8_t ha_locked)
344 {
345 	ql_dbg(ql_dbg_tgt, vha, 0xe072,
346 		"%s: qla_target(%d): type %x ox_id %04x\n",
347 		__func__, vha->vp_idx, atio->u.raw.entry_type,
348 		be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
349 
350 	switch (atio->u.raw.entry_type) {
351 	case ATIO_TYPE7:
352 	{
353 		struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
354 		    atio->u.isp24.fcp_hdr.d_id);
355 		if (unlikely(NULL == host)) {
356 			ql_dbg(ql_dbg_tgt, vha, 0xe03e,
357 			    "qla_target(%d): Received ATIO_TYPE7 "
358 			    "with unknown d_id %x:%x:%x\n", vha->vp_idx,
359 			    atio->u.isp24.fcp_hdr.d_id.domain,
360 			    atio->u.isp24.fcp_hdr.d_id.area,
361 			    atio->u.isp24.fcp_hdr.d_id.al_pa);
362 
363 
364 			qlt_queue_unknown_atio(vha, atio, ha_locked);
365 			break;
366 		}
367 		if (unlikely(!list_empty(&vha->unknown_atio_list)))
368 			qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
369 
370 		qlt_24xx_atio_pkt(host, atio, ha_locked);
371 		break;
372 	}
373 
374 	case IMMED_NOTIFY_TYPE:
375 	{
376 		struct scsi_qla_host *host = vha;
377 		struct imm_ntfy_from_isp *entry =
378 		    (struct imm_ntfy_from_isp *)atio;
379 
380 		qlt_issue_marker(vha, ha_locked);
381 
382 		if ((entry->u.isp24.vp_index != 0xFF) &&
383 		    (entry->u.isp24.nport_handle != 0xFFFF)) {
384 			host = qlt_find_host_by_vp_idx(vha,
385 			    entry->u.isp24.vp_index);
386 			if (unlikely(!host)) {
387 				ql_dbg(ql_dbg_tgt, vha, 0xe03f,
388 				    "qla_target(%d): Received "
389 				    "ATIO (IMMED_NOTIFY_TYPE) "
390 				    "with unknown vp_index %d\n",
391 				    vha->vp_idx, entry->u.isp24.vp_index);
392 				break;
393 			}
394 		}
395 		qlt_24xx_atio_pkt(host, atio, ha_locked);
396 		break;
397 	}
398 
399 	case VP_RPT_ID_IOCB_TYPE:
400 		qla24xx_report_id_acquisition(vha,
401 			(struct vp_rpt_id_entry_24xx *)atio);
402 		break;
403 
404 	case ABTS_RECV_24XX:
405 	{
406 		struct abts_recv_from_24xx *entry =
407 			(struct abts_recv_from_24xx *)atio;
408 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
409 			entry->vp_index);
410 		unsigned long flags;
411 
412 		if (unlikely(!host)) {
413 			ql_dbg(ql_dbg_tgt, vha, 0xe00a,
414 			    "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
415 			    "received, with unknown vp_index %d\n",
416 			    vha->vp_idx, entry->vp_index);
417 			break;
418 		}
419 		if (!ha_locked)
420 			spin_lock_irqsave(&host->hw->hardware_lock, flags);
421 		qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
422 		if (!ha_locked)
423 			spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
424 		break;
425 	}
426 
427 	/* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
428 
429 	default:
430 		ql_dbg(ql_dbg_tgt, vha, 0xe040,
431 		    "qla_target(%d): Received unknown ATIO atio "
432 		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
433 		break;
434 	}
435 
436 	return false;
437 }
438 
439 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
440 	struct rsp_que *rsp, response_t *pkt)
441 {
442 	switch (pkt->entry_type) {
443 	case CTIO_CRC2:
444 		ql_dbg(ql_dbg_tgt, vha, 0xe073,
445 			"qla_target(%d):%s: CRC2 Response pkt\n",
446 			vha->vp_idx, __func__);
447 		/* fall through */
448 	case CTIO_TYPE7:
449 	{
450 		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
451 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
452 		    entry->vp_index);
453 		if (unlikely(!host)) {
454 			ql_dbg(ql_dbg_tgt, vha, 0xe041,
455 			    "qla_target(%d): Response pkt (CTIO_TYPE7) "
456 			    "received, with unknown vp_index %d\n",
457 			    vha->vp_idx, entry->vp_index);
458 			break;
459 		}
460 		qlt_response_pkt(host, rsp, pkt);
461 		break;
462 	}
463 
464 	case IMMED_NOTIFY_TYPE:
465 	{
466 		struct scsi_qla_host *host = vha;
467 		struct imm_ntfy_from_isp *entry =
468 		    (struct imm_ntfy_from_isp *)pkt;
469 
470 		host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
471 		if (unlikely(!host)) {
472 			ql_dbg(ql_dbg_tgt, vha, 0xe042,
473 			    "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
474 			    "received, with unknown vp_index %d\n",
475 			    vha->vp_idx, entry->u.isp24.vp_index);
476 			break;
477 		}
478 		qlt_response_pkt(host, rsp, pkt);
479 		break;
480 	}
481 
482 	case NOTIFY_ACK_TYPE:
483 	{
484 		struct scsi_qla_host *host = vha;
485 		struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
486 
487 		if (0xFF != entry->u.isp24.vp_index) {
488 			host = qlt_find_host_by_vp_idx(vha,
489 			    entry->u.isp24.vp_index);
490 			if (unlikely(!host)) {
491 				ql_dbg(ql_dbg_tgt, vha, 0xe043,
492 				    "qla_target(%d): Response "
493 				    "pkt (NOTIFY_ACK_TYPE) "
494 				    "received, with unknown "
495 				    "vp_index %d\n", vha->vp_idx,
496 				    entry->u.isp24.vp_index);
497 				break;
498 			}
499 		}
500 		qlt_response_pkt(host, rsp, pkt);
501 		break;
502 	}
503 
504 	case ABTS_RECV_24XX:
505 	{
506 		struct abts_recv_from_24xx *entry =
507 		    (struct abts_recv_from_24xx *)pkt;
508 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
509 		    entry->vp_index);
510 		if (unlikely(!host)) {
511 			ql_dbg(ql_dbg_tgt, vha, 0xe044,
512 			    "qla_target(%d): Response pkt "
513 			    "(ABTS_RECV_24XX) received, with unknown "
514 			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
515 			break;
516 		}
517 		qlt_response_pkt(host, rsp, pkt);
518 		break;
519 	}
520 
521 	case ABTS_RESP_24XX:
522 	{
523 		struct abts_resp_to_24xx *entry =
524 		    (struct abts_resp_to_24xx *)pkt;
525 		struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
526 		    entry->vp_index);
527 		if (unlikely(!host)) {
528 			ql_dbg(ql_dbg_tgt, vha, 0xe045,
529 			    "qla_target(%d): Response pkt "
530 			    "(ABTS_RECV_24XX) received, with unknown "
531 			    "vp_index %d\n", vha->vp_idx, entry->vp_index);
532 			break;
533 		}
534 		qlt_response_pkt(host, rsp, pkt);
535 		break;
536 	}
537 	default:
538 		qlt_response_pkt(vha, rsp, pkt);
539 		break;
540 	}
541 
542 }
543 
544 /*
545  * All qlt_plogi_ack_t operations are protected by hardware_lock
546  */
547 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
548 	struct imm_ntfy_from_isp *ntfy, int type)
549 {
550 	struct qla_work_evt *e;
551 
552 	e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
553 	if (!e)
554 		return QLA_FUNCTION_FAILED;
555 
556 	e->u.nack.fcport = fcport;
557 	e->u.nack.type = type;
558 	memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
559 	return qla2x00_post_work(vha, e);
560 }
561 
562 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
563 {
564 	struct scsi_qla_host *vha = sp->vha;
565 	unsigned long flags;
566 
567 	ql_dbg(ql_dbg_disc, vha, 0x20f2,
568 	    "Async done-%s res %x %8phC  type %d\n",
569 	    sp->name, res, sp->fcport->port_name, sp->type);
570 
571 	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
572 	sp->fcport->flags &= ~FCF_ASYNC_SENT;
573 	sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
574 
575 	switch (sp->type) {
576 	case SRB_NACK_PLOGI:
577 		sp->fcport->login_gen++;
578 		sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
579 		sp->fcport->logout_on_delete = 1;
580 		sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
581 		sp->fcport->send_els_logo = 0;
582 		break;
583 
584 	case SRB_NACK_PRLI:
585 		sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
586 		sp->fcport->deleted = 0;
587 		sp->fcport->send_els_logo = 0;
588 
589 		if (!sp->fcport->login_succ &&
590 		    !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
591 			sp->fcport->login_succ = 1;
592 
593 			vha->fcport_count++;
594 			spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
595 			qla24xx_sched_upd_fcport(sp->fcport);
596 			spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
597 		} else {
598 			sp->fcport->login_retry = 0;
599 			sp->fcport->disc_state = DSC_LOGIN_COMPLETE;
600 			sp->fcport->deleted = 0;
601 			sp->fcport->logout_on_delete = 1;
602 		}
603 		break;
604 
605 	case SRB_NACK_LOGO:
606 		sp->fcport->login_gen++;
607 		sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
608 		qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
609 		break;
610 	}
611 	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
612 
613 	sp->free(sp);
614 }
615 
616 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
617 	struct imm_ntfy_from_isp *ntfy, int type)
618 {
619 	int rval = QLA_FUNCTION_FAILED;
620 	srb_t *sp;
621 	char *c = NULL;
622 
623 	fcport->flags |= FCF_ASYNC_SENT;
624 	switch (type) {
625 	case SRB_NACK_PLOGI:
626 		fcport->fw_login_state = DSC_LS_PLOGI_PEND;
627 		c = "PLOGI";
628 		break;
629 	case SRB_NACK_PRLI:
630 		fcport->fw_login_state = DSC_LS_PRLI_PEND;
631 		fcport->deleted = 0;
632 		c = "PRLI";
633 		break;
634 	case SRB_NACK_LOGO:
635 		fcport->fw_login_state = DSC_LS_LOGO_PEND;
636 		c = "LOGO";
637 		break;
638 	}
639 
640 	sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
641 	if (!sp)
642 		goto done;
643 
644 	sp->type = type;
645 	sp->name = "nack";
646 
647 	sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
648 	qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
649 
650 	sp->u.iocb_cmd.u.nack.ntfy = ntfy;
651 	sp->done = qla2x00_async_nack_sp_done;
652 
653 	ql_dbg(ql_dbg_disc, vha, 0x20f4,
654 	    "Async-%s %8phC hndl %x %s\n",
655 	    sp->name, fcport->port_name, sp->handle, c);
656 
657 	rval = qla2x00_start_sp(sp);
658 	if (rval != QLA_SUCCESS)
659 		goto done_free_sp;
660 
661 	return rval;
662 
663 done_free_sp:
664 	sp->free(sp);
665 done:
666 	fcport->flags &= ~FCF_ASYNC_SENT;
667 	return rval;
668 }
669 
670 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
671 {
672 	fc_port_t *t;
673 
674 	switch (e->u.nack.type) {
675 	case SRB_NACK_PRLI:
676 		t = e->u.nack.fcport;
677 		flush_work(&t->del_work);
678 		flush_work(&t->free_work);
679 		mutex_lock(&vha->vha_tgt.tgt_mutex);
680 		t = qlt_create_sess(vha, e->u.nack.fcport, 0);
681 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
682 		if (t) {
683 			ql_log(ql_log_info, vha, 0xd034,
684 			    "%s create sess success %p", __func__, t);
685 			/* create sess has an extra kref */
686 			vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
687 		}
688 		break;
689 	}
690 	qla24xx_async_notify_ack(vha, e->u.nack.fcport,
691 	    (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
692 }
693 
694 void qla24xx_delete_sess_fn(struct work_struct *work)
695 {
696 	fc_port_t *fcport = container_of(work, struct fc_port, del_work);
697 	struct qla_hw_data *ha = fcport->vha->hw;
698 
699 	if (fcport->se_sess) {
700 		ha->tgt.tgt_ops->shutdown_sess(fcport);
701 		ha->tgt.tgt_ops->put_sess(fcport);
702 	} else {
703 		qlt_unreg_sess(fcport);
704 	}
705 }
706 
707 /*
708  * Called from qla2x00_reg_remote_port()
709  */
710 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
711 {
712 	struct qla_hw_data *ha = vha->hw;
713 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
714 	struct fc_port *sess = fcport;
715 	unsigned long flags;
716 
717 	if (!vha->hw->tgt.tgt_ops)
718 		return;
719 
720 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
721 	if (tgt->tgt_stop) {
722 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
723 		return;
724 	}
725 
726 	if (fcport->disc_state == DSC_DELETE_PEND) {
727 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
728 		return;
729 	}
730 
731 	if (!sess->se_sess) {
732 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
733 
734 		mutex_lock(&vha->vha_tgt.tgt_mutex);
735 		sess = qlt_create_sess(vha, fcport, false);
736 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
737 
738 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
739 	} else {
740 		if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
741 			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
742 			return;
743 		}
744 
745 		if (!kref_get_unless_zero(&sess->sess_kref)) {
746 			ql_dbg(ql_dbg_disc, vha, 0x2107,
747 			    "%s: kref_get fail sess %8phC \n",
748 			    __func__, sess->port_name);
749 			spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
750 			return;
751 		}
752 
753 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
754 		    "qla_target(%u): %ssession for port %8phC "
755 		    "(loop ID %d) reappeared\n", vha->vp_idx,
756 		    sess->local ? "local " : "", sess->port_name, sess->loop_id);
757 
758 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
759 		    "Reappeared sess %p\n", sess);
760 
761 		ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
762 		    fcport->loop_id,
763 		    (fcport->flags & FCF_CONF_COMP_SUPPORTED));
764 	}
765 
766 	if (sess && sess->local) {
767 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
768 		    "qla_target(%u): local session for "
769 		    "port %8phC (loop ID %d) became global\n", vha->vp_idx,
770 		    fcport->port_name, sess->loop_id);
771 		sess->local = 0;
772 	}
773 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
774 
775 	ha->tgt.tgt_ops->put_sess(sess);
776 }
777 
778 /*
779  * This is a zero-base ref-counting solution, since hardware_lock
780  * guarantees that ref_count is not modified concurrently.
781  * Upon successful return content of iocb is undefined
782  */
783 static struct qlt_plogi_ack_t *
784 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
785 		       struct imm_ntfy_from_isp *iocb)
786 {
787 	struct qlt_plogi_ack_t *pla;
788 
789 	lockdep_assert_held(&vha->hw->hardware_lock);
790 
791 	list_for_each_entry(pla, &vha->plogi_ack_list, list) {
792 		if (pla->id.b24 == id->b24) {
793 			ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
794 			    "%s %d %8phC Term INOT due to new INOT",
795 			    __func__, __LINE__,
796 			    pla->iocb.u.isp24.port_name);
797 			qlt_send_term_imm_notif(vha, &pla->iocb, 1);
798 			memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
799 			return pla;
800 		}
801 	}
802 
803 	pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
804 	if (!pla) {
805 		ql_dbg(ql_dbg_async, vha, 0x5088,
806 		       "qla_target(%d): Allocation of plogi_ack failed\n",
807 		       vha->vp_idx);
808 		return NULL;
809 	}
810 
811 	memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
812 	pla->id = *id;
813 	list_add_tail(&pla->list, &vha->plogi_ack_list);
814 
815 	return pla;
816 }
817 
818 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
819     struct qlt_plogi_ack_t *pla)
820 {
821 	struct imm_ntfy_from_isp *iocb = &pla->iocb;
822 	port_id_t port_id;
823 	uint16_t loop_id;
824 	fc_port_t *fcport = pla->fcport;
825 
826 	BUG_ON(!pla->ref_count);
827 	pla->ref_count--;
828 
829 	if (pla->ref_count)
830 		return;
831 
832 	ql_dbg(ql_dbg_disc, vha, 0x5089,
833 	    "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
834 	    " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
835 	    iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
836 	    iocb->u.isp24.port_id[0],
837 	    le16_to_cpu(iocb->u.isp24.nport_handle),
838 	    iocb->u.isp24.exchange_address, iocb->ox_id);
839 
840 	port_id.b.domain = iocb->u.isp24.port_id[2];
841 	port_id.b.area   = iocb->u.isp24.port_id[1];
842 	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
843 	port_id.b.rsvd_1 = 0;
844 
845 	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
846 
847 	fcport->loop_id = loop_id;
848 	fcport->d_id = port_id;
849 	if (iocb->u.isp24.status_subcode == ELS_PLOGI)
850 		qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
851 	else
852 		qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
853 
854 	list_for_each_entry(fcport, &vha->vp_fcports, list) {
855 		if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
856 			fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
857 		if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
858 			fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
859 	}
860 
861 	list_del(&pla->list);
862 	kmem_cache_free(qla_tgt_plogi_cachep, pla);
863 }
864 
865 void
866 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
867     struct fc_port *sess, enum qlt_plogi_link_t link)
868 {
869 	struct imm_ntfy_from_isp *iocb = &pla->iocb;
870 	/* Inc ref_count first because link might already be pointing at pla */
871 	pla->ref_count++;
872 
873 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
874 		"Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
875 		" s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
876 		sess, link, sess->port_name,
877 		iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
878 		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
879 		pla->ref_count, pla, link);
880 
881 	if (link == QLT_PLOGI_LINK_CONFLICT) {
882 		switch (sess->disc_state) {
883 		case DSC_DELETED:
884 		case DSC_DELETE_PEND:
885 			pla->ref_count--;
886 			return;
887 		default:
888 			break;
889 		}
890 	}
891 
892 	if (sess->plogi_link[link])
893 		qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
894 
895 	if (link == QLT_PLOGI_LINK_SAME_WWN)
896 		pla->fcport = sess;
897 
898 	sess->plogi_link[link] = pla;
899 }
900 
901 typedef struct {
902 	/* These fields must be initialized by the caller */
903 	port_id_t id;
904 	/*
905 	 * number of cmds dropped while we were waiting for
906 	 * initiator to ack LOGO initialize to 1 if LOGO is
907 	 * triggered by a command, otherwise, to 0
908 	 */
909 	int cmd_count;
910 
911 	/* These fields are used by callee */
912 	struct list_head list;
913 } qlt_port_logo_t;
914 
915 static void
916 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
917 {
918 	qlt_port_logo_t *tmp;
919 	int res;
920 
921 	mutex_lock(&vha->vha_tgt.tgt_mutex);
922 
923 	list_for_each_entry(tmp, &vha->logo_list, list) {
924 		if (tmp->id.b24 == logo->id.b24) {
925 			tmp->cmd_count += logo->cmd_count;
926 			mutex_unlock(&vha->vha_tgt.tgt_mutex);
927 			return;
928 		}
929 	}
930 
931 	list_add_tail(&logo->list, &vha->logo_list);
932 
933 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
934 
935 	res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
936 
937 	mutex_lock(&vha->vha_tgt.tgt_mutex);
938 	list_del(&logo->list);
939 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
940 
941 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
942 	    "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
943 	    logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
944 	    logo->cmd_count, res);
945 }
946 
947 void qlt_free_session_done(struct work_struct *work)
948 {
949 	struct fc_port *sess = container_of(work, struct fc_port,
950 	    free_work);
951 	struct qla_tgt *tgt = sess->tgt;
952 	struct scsi_qla_host *vha = sess->vha;
953 	struct qla_hw_data *ha = vha->hw;
954 	unsigned long flags;
955 	bool logout_started = false;
956 	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
957 	struct qlt_plogi_ack_t *own =
958 		sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
959 
960 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
961 		"%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
962 		" s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
963 		__func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
964 		sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
965 		sess->logout_on_delete, sess->keep_nport_handle,
966 		sess->send_els_logo);
967 
968 	if (!IS_SW_RESV_ADDR(sess->d_id)) {
969 		qla2x00_mark_device_lost(vha, sess, 0, 0);
970 
971 		if (sess->send_els_logo) {
972 			qlt_port_logo_t logo;
973 
974 			logo.id = sess->d_id;
975 			logo.cmd_count = 0;
976 			if (!own)
977 				qlt_send_first_logo(vha, &logo);
978 			sess->send_els_logo = 0;
979 		}
980 
981 		if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
982 			int rc;
983 
984 			if (!own ||
985 			    (own &&
986 			     (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
987 				rc = qla2x00_post_async_logout_work(vha, sess,
988 				    NULL);
989 				if (rc != QLA_SUCCESS)
990 					ql_log(ql_log_warn, vha, 0xf085,
991 					    "Schedule logo failed sess %p rc %d\n",
992 					    sess, rc);
993 				else
994 					logout_started = true;
995 			} else if (own && (own->iocb.u.isp24.status_subcode ==
996 				ELS_PRLI) && ha->flags.rida_fmt2) {
997 				rc = qla2x00_post_async_prlo_work(vha, sess,
998 				    NULL);
999 				if (rc != QLA_SUCCESS)
1000 					ql_log(ql_log_warn, vha, 0xf085,
1001 					    "Schedule PRLO failed sess %p rc %d\n",
1002 					    sess, rc);
1003 				else
1004 					logout_started = true;
1005 			}
1006 		} /* if sess->logout_on_delete */
1007 
1008 		if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1009 		    !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1010 			sess->nvme_flag |= NVME_FLAG_DELETING;
1011 			qla_nvme_unregister_remote_port(sess);
1012 		}
1013 	}
1014 
1015 	/*
1016 	 * Release the target session for FC Nexus from fabric module code.
1017 	 */
1018 	if (sess->se_sess != NULL)
1019 		ha->tgt.tgt_ops->free_session(sess);
1020 
1021 	if (logout_started) {
1022 		bool traced = false;
1023 		u16 cnt = 0;
1024 
1025 		while (!READ_ONCE(sess->logout_completed)) {
1026 			if (!traced) {
1027 				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1028 					"%s: waiting for sess %p logout\n",
1029 					__func__, sess);
1030 				traced = true;
1031 			}
1032 			msleep(100);
1033 			cnt++;
1034 			if (cnt > 200)
1035 				break;
1036 		}
1037 
1038 		ql_dbg(ql_dbg_disc, vha, 0xf087,
1039 		    "%s: sess %p logout completed\n", __func__, sess);
1040 	}
1041 
1042 	if (sess->logo_ack_needed) {
1043 		sess->logo_ack_needed = 0;
1044 		qla24xx_async_notify_ack(vha, sess,
1045 			(struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1046 	}
1047 
1048 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1049 	if (sess->se_sess) {
1050 		sess->se_sess = NULL;
1051 		if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1052 			tgt->sess_count--;
1053 	}
1054 
1055 	sess->disc_state = DSC_DELETED;
1056 	sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1057 	sess->deleted = QLA_SESS_DELETED;
1058 
1059 	if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1060 		vha->fcport_count--;
1061 		sess->login_succ = 0;
1062 	}
1063 
1064 	qla2x00_clear_loop_id(sess);
1065 
1066 	if (sess->conflict) {
1067 		sess->conflict->login_pause = 0;
1068 		sess->conflict = NULL;
1069 		if (!test_bit(UNLOADING, &vha->dpc_flags))
1070 			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1071 	}
1072 
1073 	{
1074 		struct qlt_plogi_ack_t *con =
1075 		    sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1076 		struct imm_ntfy_from_isp *iocb;
1077 
1078 		own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1079 
1080 		if (con) {
1081 			iocb = &con->iocb;
1082 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1083 				 "se_sess %p / sess %p port %8phC is gone,"
1084 				 " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1085 				 sess->se_sess, sess, sess->port_name,
1086 				 own ? "releasing own PLOGI" : "no own PLOGI pending",
1087 				 own ? own->ref_count : -1,
1088 				 iocb->u.isp24.port_name, con->ref_count);
1089 			qlt_plogi_ack_unref(vha, con);
1090 			sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1091 		} else {
1092 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1093 			    "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1094 			    sess->se_sess, sess, sess->port_name,
1095 			    own ? "releasing own PLOGI" :
1096 			    "no own PLOGI pending",
1097 			    own ? own->ref_count : -1);
1098 		}
1099 
1100 		if (own) {
1101 			sess->fw_login_state = DSC_LS_PLOGI_PEND;
1102 			qlt_plogi_ack_unref(vha, own);
1103 			sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1104 		}
1105 	}
1106 
1107 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1108 	sess->free_pending = 0;
1109 
1110 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1111 	    "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1112 		sess, sess->port_name, vha->fcport_count);
1113 
1114 	if (tgt && (tgt->sess_count == 0))
1115 		wake_up_all(&tgt->waitQ);
1116 
1117 	if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1118 	    !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1119 	    (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1120 		switch (vha->host->active_mode) {
1121 		case MODE_INITIATOR:
1122 		case MODE_DUAL:
1123 			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1124 			qla2xxx_wake_dpc(vha);
1125 			break;
1126 		case MODE_TARGET:
1127 		default:
1128 			/* no-op */
1129 			break;
1130 		}
1131 	}
1132 
1133 	if (vha->fcport_count == 0)
1134 		wake_up_all(&vha->fcport_waitQ);
1135 }
1136 
1137 /* ha->tgt.sess_lock supposed to be held on entry */
1138 void qlt_unreg_sess(struct fc_port *sess)
1139 {
1140 	struct scsi_qla_host *vha = sess->vha;
1141 	unsigned long flags;
1142 
1143 	ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1144 	    "%s sess %p for deletion %8phC\n",
1145 	    __func__, sess, sess->port_name);
1146 
1147 	spin_lock_irqsave(&sess->vha->work_lock, flags);
1148 	if (sess->free_pending) {
1149 		spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1150 		return;
1151 	}
1152 	sess->free_pending = 1;
1153 	spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1154 
1155 	if (sess->se_sess)
1156 		vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1157 
1158 	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1159 	sess->disc_state = DSC_DELETE_PEND;
1160 	sess->last_rscn_gen = sess->rscn_gen;
1161 	sess->last_login_gen = sess->login_gen;
1162 
1163 	INIT_WORK(&sess->free_work, qlt_free_session_done);
1164 	queue_work(sess->vha->hw->wq, &sess->free_work);
1165 }
1166 EXPORT_SYMBOL(qlt_unreg_sess);
1167 
1168 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1169 {
1170 	struct qla_hw_data *ha = vha->hw;
1171 	struct fc_port *sess = NULL;
1172 	uint16_t loop_id;
1173 	int res = 0;
1174 	struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1175 	unsigned long flags;
1176 
1177 	loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1178 	if (loop_id == 0xFFFF) {
1179 		/* Global event */
1180 		atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1181 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1182 		qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1183 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1184 	} else {
1185 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1186 		sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1187 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1188 	}
1189 
1190 	ql_dbg(ql_dbg_tgt, vha, 0xe000,
1191 	    "Using sess for qla_tgt_reset: %p\n", sess);
1192 	if (!sess) {
1193 		res = -ESRCH;
1194 		return res;
1195 	}
1196 
1197 	ql_dbg(ql_dbg_tgt, vha, 0xe047,
1198 	    "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1199 	    "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1200 	    mcmd, loop_id);
1201 
1202 	return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1203 }
1204 
1205 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1206 {
1207 	if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1208 		sess->logout_on_delete = 0;
1209 		sess->logo_ack_needed = 0;
1210 		sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1211 	}
1212 }
1213 
1214 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1215 {
1216 	struct qla_tgt *tgt = sess->tgt;
1217 	unsigned long flags;
1218 	u16 sec;
1219 
1220 	switch (sess->disc_state) {
1221 	case DSC_DELETE_PEND:
1222 		return;
1223 	case DSC_DELETED:
1224 		if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1225 			wake_up_all(&tgt->waitQ);
1226 		if (sess->vha->fcport_count == 0)
1227 			wake_up_all(&sess->vha->fcport_waitQ);
1228 
1229 		if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1230 			!sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1231 			return;
1232 		break;
1233 	case DSC_UPD_FCPORT:
1234 		/*
1235 		 * This port is not done reporting to upper layer.
1236 		 * let it finish
1237 		 */
1238 		sess->next_disc_state = DSC_DELETE_PEND;
1239 		sec = jiffies_to_msecs(jiffies -
1240 		    sess->jiffies_at_registration)/1000;
1241 		if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1242 			sess->sec_since_registration = sec;
1243 			ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1244 			    "%s %8phC : Slow Rport registration(%d Sec)\n",
1245 			    __func__, sess->port_name, sec);
1246 		}
1247 		return;
1248 	default:
1249 		break;
1250 	}
1251 
1252 	spin_lock_irqsave(&sess->vha->work_lock, flags);
1253 	if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1254 		spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1255 		return;
1256 	}
1257 	sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1258 	spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1259 
1260 	sess->disc_state = DSC_DELETE_PEND;
1261 
1262 	qla24xx_chk_fcp_state(sess);
1263 
1264 	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1265 	    "Scheduling sess %p for deletion %8phC\n",
1266 	    sess, sess->port_name);
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, be_id_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, *gid;
1291 	int res, rc, i;
1292 	uint16_t entries;
1293 
1294 	gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1295 	    &gid_list_dma, GFP_KERNEL);
1296 	if (!gid_list) {
1297 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1298 		    "qla_target(%d): DMA Alloc failed of %u\n",
1299 		    vha->vp_idx, qla2x00_gid_list_size(ha));
1300 		return -ENOMEM;
1301 	}
1302 
1303 	/* Get list of logged in devices */
1304 	rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1305 	if (rc != QLA_SUCCESS) {
1306 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1307 		    "qla_target(%d): get_id_list() failed: %x\n",
1308 		    vha->vp_idx, rc);
1309 		res = -EBUSY;
1310 		goto out_free_id_list;
1311 	}
1312 
1313 	gid = gid_list;
1314 	res = -ENOENT;
1315 	for (i = 0; i < entries; i++) {
1316 		if (gid->al_pa == s_id.al_pa &&
1317 		    gid->area == s_id.area &&
1318 		    gid->domain == s_id.domain) {
1319 			*loop_id = le16_to_cpu(gid->loop_id);
1320 			res = 0;
1321 			break;
1322 		}
1323 		gid = (void *)gid + ha->gid_list_info_size;
1324 	}
1325 
1326 out_free_id_list:
1327 	dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1328 	    gid_list, gid_list_dma);
1329 	return res;
1330 }
1331 
1332 /*
1333  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1334  * Caller must put it.
1335  */
1336 static struct fc_port *qlt_create_sess(
1337 	struct scsi_qla_host *vha,
1338 	fc_port_t *fcport,
1339 	bool local)
1340 {
1341 	struct qla_hw_data *ha = vha->hw;
1342 	struct fc_port *sess = fcport;
1343 	unsigned long flags;
1344 
1345 	if (vha->vha_tgt.qla_tgt->tgt_stop)
1346 		return NULL;
1347 
1348 	if (fcport->se_sess) {
1349 		if (!kref_get_unless_zero(&sess->sess_kref)) {
1350 			ql_dbg(ql_dbg_disc, vha, 0x20f6,
1351 			    "%s: kref_get_unless_zero failed for %8phC\n",
1352 			    __func__, sess->port_name);
1353 			return NULL;
1354 		}
1355 		return fcport;
1356 	}
1357 	sess->tgt = vha->vha_tgt.qla_tgt;
1358 	sess->local = local;
1359 
1360 	/*
1361 	 * Under normal circumstances we want to logout from firmware when
1362 	 * session eventually ends and release corresponding nport handle.
1363 	 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1364 	 * code will adjust these flags as necessary.
1365 	 */
1366 	sess->logout_on_delete = 1;
1367 	sess->keep_nport_handle = 0;
1368 	sess->logout_completed = 0;
1369 
1370 	if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1371 	    &fcport->port_name[0], sess) < 0) {
1372 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1373 		    "(%d) %8phC check_initiator_node_acl failed\n",
1374 		    vha->vp_idx, fcport->port_name);
1375 		return NULL;
1376 	} else {
1377 		kref_init(&fcport->sess_kref);
1378 		/*
1379 		 * Take an extra reference to ->sess_kref here to handle
1380 		 * fc_port access across ->tgt.sess_lock reaquire.
1381 		 */
1382 		if (!kref_get_unless_zero(&sess->sess_kref)) {
1383 			ql_dbg(ql_dbg_disc, vha, 0x20f7,
1384 			    "%s: kref_get_unless_zero failed for %8phC\n",
1385 			    __func__, sess->port_name);
1386 			return NULL;
1387 		}
1388 
1389 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1390 		if (!IS_SW_RESV_ADDR(sess->d_id))
1391 			vha->vha_tgt.qla_tgt->sess_count++;
1392 
1393 		qlt_do_generation_tick(vha, &sess->generation);
1394 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1395 	}
1396 
1397 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1398 	    "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1399 	    sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1400 	    vha->vha_tgt.qla_tgt->sess_count);
1401 
1402 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1403 	    "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1404 	    "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1405 	    vha->vp_idx, local ?  "local " : "", fcport->port_name,
1406 	    fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1407 	    sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1408 
1409 	return sess;
1410 }
1411 
1412 /*
1413  * max_gen - specifies maximum session generation
1414  * at which this deletion requestion is still valid
1415  */
1416 void
1417 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1418 {
1419 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1420 	struct fc_port *sess = fcport;
1421 	unsigned long flags;
1422 
1423 	if (!vha->hw->tgt.tgt_ops)
1424 		return;
1425 
1426 	if (!tgt)
1427 		return;
1428 
1429 	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1430 	if (tgt->tgt_stop) {
1431 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1432 		return;
1433 	}
1434 	if (!sess->se_sess) {
1435 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1436 		return;
1437 	}
1438 
1439 	if (max_gen - sess->generation < 0) {
1440 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1441 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1442 		    "Ignoring stale deletion request for se_sess %p / sess %p"
1443 		    " for port %8phC, req_gen %d, sess_gen %d\n",
1444 		    sess->se_sess, sess, sess->port_name, max_gen,
1445 		    sess->generation);
1446 		return;
1447 	}
1448 
1449 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1450 
1451 	sess->local = 1;
1452 	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1453 	qlt_schedule_sess_for_deletion(sess);
1454 }
1455 
1456 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1457 {
1458 	struct qla_hw_data *ha = tgt->ha;
1459 	unsigned long flags;
1460 	int res;
1461 	/*
1462 	 * We need to protect against race, when tgt is freed before or
1463 	 * inside wake_up()
1464 	 */
1465 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1466 	ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1467 	    "tgt %p, sess_count=%d\n",
1468 	    tgt, tgt->sess_count);
1469 	res = (tgt->sess_count == 0);
1470 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1471 
1472 	return res;
1473 }
1474 
1475 /* Called by tcm_qla2xxx configfs code */
1476 int qlt_stop_phase1(struct qla_tgt *tgt)
1477 {
1478 	struct scsi_qla_host *vha = tgt->vha;
1479 	struct qla_hw_data *ha = tgt->ha;
1480 	unsigned long flags;
1481 
1482 	mutex_lock(&ha->optrom_mutex);
1483 	mutex_lock(&qla_tgt_mutex);
1484 
1485 	if (tgt->tgt_stop || tgt->tgt_stopped) {
1486 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1487 		    "Already in tgt->tgt_stop or tgt_stopped state\n");
1488 		mutex_unlock(&qla_tgt_mutex);
1489 		mutex_unlock(&ha->optrom_mutex);
1490 		return -EPERM;
1491 	}
1492 
1493 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1494 	    vha->host_no, vha);
1495 	/*
1496 	 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1497 	 * Lock is needed, because we still can get an incoming packet.
1498 	 */
1499 	mutex_lock(&vha->vha_tgt.tgt_mutex);
1500 	tgt->tgt_stop = 1;
1501 	qlt_clear_tgt_db(tgt);
1502 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1503 	mutex_unlock(&qla_tgt_mutex);
1504 
1505 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1506 	    "Waiting for sess works (tgt %p)", tgt);
1507 	spin_lock_irqsave(&tgt->sess_work_lock, flags);
1508 	while (!list_empty(&tgt->sess_works_list)) {
1509 		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1510 		flush_scheduled_work();
1511 		spin_lock_irqsave(&tgt->sess_work_lock, flags);
1512 	}
1513 	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1514 
1515 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1516 	    "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1517 
1518 	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1519 
1520 	/* Big hammer */
1521 	if (!ha->flags.host_shutting_down &&
1522 	    (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1523 		qlt_disable_vha(vha);
1524 
1525 	/* Wait for sessions to clear out (just in case) */
1526 	wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1527 	mutex_unlock(&ha->optrom_mutex);
1528 
1529 	return 0;
1530 }
1531 EXPORT_SYMBOL(qlt_stop_phase1);
1532 
1533 /* Called by tcm_qla2xxx configfs code */
1534 void qlt_stop_phase2(struct qla_tgt *tgt)
1535 {
1536 	scsi_qla_host_t *vha = tgt->vha;
1537 
1538 	if (tgt->tgt_stopped) {
1539 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1540 		    "Already in tgt->tgt_stopped state\n");
1541 		dump_stack();
1542 		return;
1543 	}
1544 	if (!tgt->tgt_stop) {
1545 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1546 		    "%s: phase1 stop is not completed\n", __func__);
1547 		dump_stack();
1548 		return;
1549 	}
1550 
1551 	mutex_lock(&vha->vha_tgt.tgt_mutex);
1552 	tgt->tgt_stop = 0;
1553 	tgt->tgt_stopped = 1;
1554 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
1555 
1556 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1557 	    tgt);
1558 
1559 	switch (vha->qlini_mode) {
1560 	case QLA2XXX_INI_MODE_EXCLUSIVE:
1561 		vha->flags.online = 1;
1562 		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1563 		break;
1564 	default:
1565 		break;
1566 	}
1567 }
1568 EXPORT_SYMBOL(qlt_stop_phase2);
1569 
1570 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1571 static void qlt_release(struct qla_tgt *tgt)
1572 {
1573 	scsi_qla_host_t *vha = tgt->vha;
1574 	void *node;
1575 	u64 key = 0;
1576 	u16 i;
1577 	struct qla_qpair_hint *h;
1578 	struct qla_hw_data *ha = vha->hw;
1579 
1580 	if (!tgt->tgt_stop && !tgt->tgt_stopped)
1581 		qlt_stop_phase1(tgt);
1582 
1583 	if (!tgt->tgt_stopped)
1584 		qlt_stop_phase2(tgt);
1585 
1586 	for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1587 		unsigned long flags;
1588 
1589 		h = &tgt->qphints[i];
1590 		if (h->qpair) {
1591 			spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1592 			list_del(&h->hint_elem);
1593 			spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1594 			h->qpair = NULL;
1595 		}
1596 	}
1597 	kfree(tgt->qphints);
1598 	mutex_lock(&qla_tgt_mutex);
1599 	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1600 	mutex_unlock(&qla_tgt_mutex);
1601 
1602 	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1603 		btree_remove64(&tgt->lun_qpair_map, key);
1604 
1605 	btree_destroy64(&tgt->lun_qpair_map);
1606 
1607 	if (vha->vp_idx)
1608 		if (ha->tgt.tgt_ops &&
1609 		    ha->tgt.tgt_ops->remove_target &&
1610 		    vha->vha_tgt.target_lport_ptr)
1611 			ha->tgt.tgt_ops->remove_target(vha);
1612 
1613 	vha->vha_tgt.qla_tgt = NULL;
1614 
1615 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1616 	    "Release of tgt %p finished\n", tgt);
1617 
1618 	kfree(tgt);
1619 }
1620 
1621 /* ha->hardware_lock supposed to be held on entry */
1622 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1623 	const void *param, unsigned int param_size)
1624 {
1625 	struct qla_tgt_sess_work_param *prm;
1626 	unsigned long flags;
1627 
1628 	prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1629 	if (!prm) {
1630 		ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1631 		    "qla_target(%d): Unable to create session "
1632 		    "work, command will be refused", 0);
1633 		return -ENOMEM;
1634 	}
1635 
1636 	ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1637 	    "Scheduling work (type %d, prm %p)"
1638 	    " to find session for param %p (size %d, tgt %p)\n",
1639 	    type, prm, param, param_size, tgt);
1640 
1641 	prm->type = type;
1642 	memcpy(&prm->tm_iocb, param, param_size);
1643 
1644 	spin_lock_irqsave(&tgt->sess_work_lock, flags);
1645 	list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1646 	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1647 
1648 	schedule_work(&tgt->sess_work);
1649 
1650 	return 0;
1651 }
1652 
1653 /*
1654  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1655  */
1656 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1657 	struct imm_ntfy_from_isp *ntfy,
1658 	uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1659 	uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1660 {
1661 	struct scsi_qla_host *vha = qpair->vha;
1662 	struct qla_hw_data *ha = vha->hw;
1663 	request_t *pkt;
1664 	struct nack_to_isp *nack;
1665 
1666 	if (!ha->flags.fw_started)
1667 		return;
1668 
1669 	ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1670 
1671 	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1672 	if (!pkt) {
1673 		ql_dbg(ql_dbg_tgt, vha, 0xe049,
1674 		    "qla_target(%d): %s failed: unable to allocate "
1675 		    "request packet\n", vha->vp_idx, __func__);
1676 		return;
1677 	}
1678 
1679 	if (vha->vha_tgt.qla_tgt != NULL)
1680 		vha->vha_tgt.qla_tgt->notify_ack_expected++;
1681 
1682 	pkt->entry_type = NOTIFY_ACK_TYPE;
1683 	pkt->entry_count = 1;
1684 
1685 	nack = (struct nack_to_isp *)pkt;
1686 	nack->ox_id = ntfy->ox_id;
1687 
1688 	nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1689 	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1690 	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1691 		nack->u.isp24.flags = ntfy->u.isp24.flags &
1692 			cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1693 	}
1694 	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1695 	nack->u.isp24.status = ntfy->u.isp24.status;
1696 	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1697 	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1698 	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1699 	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1700 	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1701 	nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1702 	nack->u.isp24.srr_reject_code = srr_reject_code;
1703 	nack->u.isp24.srr_reject_code_expl = srr_explan;
1704 	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1705 
1706 	ql_dbg(ql_dbg_tgt, vha, 0xe005,
1707 	    "qla_target(%d): Sending 24xx Notify Ack %d\n",
1708 	    vha->vp_idx, nack->u.isp24.status);
1709 
1710 	/* Memory Barrier */
1711 	wmb();
1712 	qla2x00_start_iocbs(vha, qpair->req);
1713 }
1714 
1715 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1716 {
1717 	struct scsi_qla_host *vha = mcmd->vha;
1718 	struct qla_hw_data *ha = vha->hw;
1719 	struct abts_resp_to_24xx *resp;
1720 	uint32_t f_ctl, h;
1721 	uint8_t *p;
1722 	int rc;
1723 	struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1724 	struct qla_qpair *qpair = mcmd->qpair;
1725 
1726 	ql_dbg(ql_dbg_tgt, vha, 0xe006,
1727 	    "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1728 	    ha, mcmd->fc_tm_rsp);
1729 
1730 	rc = qlt_check_reserve_free_req(qpair, 1);
1731 	if (rc) {
1732 		ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1733 		    "qla_target(%d): %s failed: unable to allocate request packet\n",
1734 		    vha->vp_idx, __func__);
1735 		return -EAGAIN;
1736 	}
1737 
1738 	resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1739 	memset(resp, 0, sizeof(*resp));
1740 
1741 	h = qlt_make_handle(qpair);
1742 	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1743 		/*
1744 		 * CTIO type 7 from the firmware doesn't provide a way to
1745 		 * know the initiator's LOOP ID, hence we can't find
1746 		 * the session and, so, the command.
1747 		 */
1748 		return -EAGAIN;
1749 	} else {
1750 		qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1751 	}
1752 
1753 	resp->handle = MAKE_HANDLE(qpair->req->id, h);
1754 	resp->entry_type = ABTS_RESP_24XX;
1755 	resp->entry_count = 1;
1756 	resp->nport_handle = abts->nport_handle;
1757 	resp->vp_index = vha->vp_idx;
1758 	resp->sof_type = abts->sof_type;
1759 	resp->exchange_address = abts->exchange_address;
1760 	resp->fcp_hdr_le = abts->fcp_hdr_le;
1761 	f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1762 	    F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1763 	    F_CTL_SEQ_INITIATIVE);
1764 	p = (uint8_t *)&f_ctl;
1765 	resp->fcp_hdr_le.f_ctl[0] = *p++;
1766 	resp->fcp_hdr_le.f_ctl[1] = *p++;
1767 	resp->fcp_hdr_le.f_ctl[2] = *p;
1768 
1769 	resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1770 	resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1771 
1772 	resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1773 	if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1774 		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1775 		resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1776 		resp->payload.ba_acct.low_seq_cnt = 0x0000;
1777 		resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1778 		resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1779 		resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1780 	} else {
1781 		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1782 		resp->payload.ba_rjt.reason_code =
1783 			BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1784 		/* Other bytes are zero */
1785 	}
1786 
1787 	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1788 
1789 	/* Memory Barrier */
1790 	wmb();
1791 	if (qpair->reqq_start_iocbs)
1792 		qpair->reqq_start_iocbs(qpair);
1793 	else
1794 		qla2x00_start_iocbs(vha, qpair->req);
1795 
1796 	return rc;
1797 }
1798 
1799 /*
1800  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1801  */
1802 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1803 	struct abts_recv_from_24xx *abts, uint32_t status,
1804 	bool ids_reversed)
1805 {
1806 	struct scsi_qla_host *vha = qpair->vha;
1807 	struct qla_hw_data *ha = vha->hw;
1808 	struct abts_resp_to_24xx *resp;
1809 	uint32_t f_ctl;
1810 	uint8_t *p;
1811 
1812 	ql_dbg(ql_dbg_tgt, vha, 0xe006,
1813 	    "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1814 	    ha, abts, status);
1815 
1816 	resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1817 	    NULL);
1818 	if (!resp) {
1819 		ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1820 		    "qla_target(%d): %s failed: unable to allocate "
1821 		    "request packet", vha->vp_idx, __func__);
1822 		return;
1823 	}
1824 
1825 	resp->entry_type = ABTS_RESP_24XX;
1826 	resp->handle = QLA_TGT_SKIP_HANDLE;
1827 	resp->entry_count = 1;
1828 	resp->nport_handle = abts->nport_handle;
1829 	resp->vp_index = vha->vp_idx;
1830 	resp->sof_type = abts->sof_type;
1831 	resp->exchange_address = abts->exchange_address;
1832 	resp->fcp_hdr_le = abts->fcp_hdr_le;
1833 	f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1834 	    F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1835 	    F_CTL_SEQ_INITIATIVE);
1836 	p = (uint8_t *)&f_ctl;
1837 	resp->fcp_hdr_le.f_ctl[0] = *p++;
1838 	resp->fcp_hdr_le.f_ctl[1] = *p++;
1839 	resp->fcp_hdr_le.f_ctl[2] = *p;
1840 	if (ids_reversed) {
1841 		resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1842 		resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1843 	} else {
1844 		resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1845 		resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1846 	}
1847 	resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1848 	if (status == FCP_TMF_CMPL) {
1849 		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1850 		resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1851 		resp->payload.ba_acct.low_seq_cnt = 0x0000;
1852 		resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1853 		resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1854 		resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1855 	} else {
1856 		resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1857 		resp->payload.ba_rjt.reason_code =
1858 			BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1859 		/* Other bytes are zero */
1860 	}
1861 
1862 	vha->vha_tgt.qla_tgt->abts_resp_expected++;
1863 
1864 	/* Memory Barrier */
1865 	wmb();
1866 	if (qpair->reqq_start_iocbs)
1867 		qpair->reqq_start_iocbs(qpair);
1868 	else
1869 		qla2x00_start_iocbs(vha, qpair->req);
1870 }
1871 
1872 /*
1873  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1874  */
1875 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1876     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1877 {
1878 	struct ctio7_to_24xx *ctio;
1879 	u16 tmp;
1880 	struct abts_recv_from_24xx *entry;
1881 
1882 	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1883 	if (ctio == NULL) {
1884 		ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1885 		    "qla_target(%d): %s failed: unable to allocate "
1886 		    "request packet\n", vha->vp_idx, __func__);
1887 		return;
1888 	}
1889 
1890 	if (mcmd)
1891 		/* abts from remote port */
1892 		entry = &mcmd->orig_iocb.abts;
1893 	else
1894 		/* abts from this driver.  */
1895 		entry = (struct abts_recv_from_24xx *)pkt;
1896 
1897 	/*
1898 	 * We've got on entrance firmware's response on by us generated
1899 	 * ABTS response. So, in it ID fields are reversed.
1900 	 */
1901 
1902 	ctio->entry_type = CTIO_TYPE7;
1903 	ctio->entry_count = 1;
1904 	ctio->nport_handle = entry->nport_handle;
1905 	ctio->handle = QLA_TGT_SKIP_HANDLE |	CTIO_COMPLETION_HANDLE_MARK;
1906 	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1907 	ctio->vp_index = vha->vp_idx;
1908 	ctio->exchange_addr = entry->exchange_addr_to_abort;
1909 	tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1910 
1911 	if (mcmd) {
1912 		ctio->initiator_id = entry->fcp_hdr_le.s_id;
1913 
1914 		if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1915 			tmp |= (mcmd->abort_io_attr << 9);
1916 		else if (qpair->retry_term_cnt & 1)
1917 			tmp |= (0x4 << 9);
1918 	} else {
1919 		ctio->initiator_id = entry->fcp_hdr_le.d_id;
1920 
1921 		if (qpair->retry_term_cnt & 1)
1922 			tmp |= (0x4 << 9);
1923 	}
1924 	ctio->u.status1.flags = cpu_to_le16(tmp);
1925 	ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1926 
1927 	ql_dbg(ql_dbg_tgt, vha, 0xe007,
1928 	    "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1929 	    le16_to_cpu(ctio->u.status1.flags),
1930 	    le16_to_cpu(ctio->u.status1.ox_id),
1931 	    (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1932 
1933 	/* Memory Barrier */
1934 	wmb();
1935 	if (qpair->reqq_start_iocbs)
1936 		qpair->reqq_start_iocbs(qpair);
1937 	else
1938 		qla2x00_start_iocbs(vha, qpair->req);
1939 
1940 	if (mcmd)
1941 		qlt_build_abts_resp_iocb(mcmd);
1942 	else
1943 		qlt_24xx_send_abts_resp(qpair,
1944 		    (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1945 
1946 }
1947 
1948 /* drop cmds for the given lun
1949  * XXX only looks for cmds on the port through which lun reset was recieved
1950  * XXX does not go through the list of other port (which may have cmds
1951  *     for the same lun)
1952  */
1953 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
1954 {
1955 	struct qla_tgt_sess_op *op;
1956 	struct qla_tgt_cmd *cmd;
1957 	uint32_t key;
1958 	unsigned long flags;
1959 
1960 	key = sid_to_key(s_id);
1961 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
1962 	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1963 		uint32_t op_key;
1964 		u64 op_lun;
1965 
1966 		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1967 		op_lun = scsilun_to_int(
1968 			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1969 		if (op_key == key && op_lun == lun)
1970 			op->aborted = true;
1971 	}
1972 
1973 	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1974 		uint32_t op_key;
1975 		u64 op_lun;
1976 
1977 		op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1978 		op_lun = scsilun_to_int(
1979 			(struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1980 		if (op_key == key && op_lun == lun)
1981 			op->aborted = true;
1982 	}
1983 
1984 	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1985 		uint32_t cmd_key;
1986 		u64 cmd_lun;
1987 
1988 		cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1989 		cmd_lun = scsilun_to_int(
1990 			(struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1991 		if (cmd_key == key && cmd_lun == lun)
1992 			cmd->aborted = 1;
1993 	}
1994 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1995 }
1996 
1997 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
1998     uint64_t unpacked_lun)
1999 {
2000 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2001 	struct qla_qpair_hint *h = NULL;
2002 
2003 	if (vha->flags.qpairs_available) {
2004 		h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2005 		if (!h)
2006 			h = &tgt->qphints[0];
2007 	} else {
2008 		h = &tgt->qphints[0];
2009 	}
2010 
2011 	return h;
2012 }
2013 
2014 static void qlt_do_tmr_work(struct work_struct *work)
2015 {
2016 	struct qla_tgt_mgmt_cmd *mcmd =
2017 		container_of(work, struct qla_tgt_mgmt_cmd, work);
2018 	struct qla_hw_data *ha = mcmd->vha->hw;
2019 	int rc = EIO;
2020 	uint32_t tag;
2021 	unsigned long flags;
2022 
2023 	switch (mcmd->tmr_func) {
2024 	case QLA_TGT_ABTS:
2025 		tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
2026 		break;
2027 	default:
2028 		tag = 0;
2029 		break;
2030 	}
2031 
2032 	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2033 	    mcmd->tmr_func, tag);
2034 
2035 	if (rc != 0) {
2036 		spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2037 		switch (mcmd->tmr_func) {
2038 		case QLA_TGT_ABTS:
2039 			mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2040 			qlt_build_abts_resp_iocb(mcmd);
2041 			break;
2042 		case QLA_TGT_LUN_RESET:
2043 		case QLA_TGT_CLEAR_TS:
2044 		case QLA_TGT_ABORT_TS:
2045 		case QLA_TGT_CLEAR_ACA:
2046 		case QLA_TGT_TARGET_RESET:
2047 			qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2048 			    qla_sam_status);
2049 			break;
2050 
2051 		case QLA_TGT_ABORT_ALL:
2052 		case QLA_TGT_NEXUS_LOSS_SESS:
2053 		case QLA_TGT_NEXUS_LOSS:
2054 			qlt_send_notify_ack(mcmd->qpair,
2055 			    &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2056 			break;
2057 		}
2058 		spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2059 
2060 		ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2061 		    "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2062 		    mcmd->vha->vp_idx, rc);
2063 		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2064 	}
2065 }
2066 
2067 /* ha->hardware_lock supposed to be held on entry */
2068 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2069 	struct abts_recv_from_24xx *abts, struct fc_port *sess)
2070 {
2071 	struct qla_hw_data *ha = vha->hw;
2072 	struct qla_tgt_mgmt_cmd *mcmd;
2073 	struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2074 
2075 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2076 	    "qla_target(%d): task abort (tag=%d)\n",
2077 	    vha->vp_idx, abts->exchange_addr_to_abort);
2078 
2079 	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2080 	if (mcmd == NULL) {
2081 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2082 		    "qla_target(%d): %s: Allocation of ABORT cmd failed",
2083 		    vha->vp_idx, __func__);
2084 		return -ENOMEM;
2085 	}
2086 	memset(mcmd, 0, sizeof(*mcmd));
2087 	mcmd->cmd_type = TYPE_TGT_TMCMD;
2088 	mcmd->sess = sess;
2089 	memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2090 	mcmd->reset_count = ha->base_qpair->chip_reset;
2091 	mcmd->tmr_func = QLA_TGT_ABTS;
2092 	mcmd->qpair = h->qpair;
2093 	mcmd->vha = vha;
2094 
2095 	/*
2096 	 * LUN is looked up by target-core internally based on the passed
2097 	 * abts->exchange_addr_to_abort tag.
2098 	 */
2099 	mcmd->se_cmd.cpuid = h->cpuid;
2100 
2101 	if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2102 		struct qla_tgt_cmd *abort_cmd;
2103 
2104 		abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2105 		    abts->exchange_addr_to_abort);
2106 		if (abort_cmd && abort_cmd->qpair) {
2107 			mcmd->qpair = abort_cmd->qpair;
2108 			mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2109 			mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2110 			mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2111 		}
2112 	}
2113 
2114 	INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2115 	queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2116 
2117 	return 0;
2118 }
2119 
2120 /*
2121  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2122  */
2123 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2124 	struct abts_recv_from_24xx *abts)
2125 {
2126 	struct qla_hw_data *ha = vha->hw;
2127 	struct fc_port *sess;
2128 	uint32_t tag = abts->exchange_addr_to_abort;
2129 	be_id_t s_id;
2130 	int rc;
2131 	unsigned long flags;
2132 
2133 	if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2134 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2135 		    "qla_target(%d): ABTS: Abort Sequence not "
2136 		    "supported\n", vha->vp_idx);
2137 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2138 		    false);
2139 		return;
2140 	}
2141 
2142 	if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2143 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2144 		    "qla_target(%d): ABTS: Unknown Exchange "
2145 		    "Address received\n", vha->vp_idx);
2146 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2147 		    false);
2148 		return;
2149 	}
2150 
2151 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2152 	    "qla_target(%d): task abort (s_id=%x:%x:%x, "
2153 	    "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2154 	    abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2155 	    le32_to_cpu(abts->fcp_hdr_le.parameter));
2156 
2157 	s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2158 
2159 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2160 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2161 	if (!sess) {
2162 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2163 		    "qla_target(%d): task abort for non-existent session\n",
2164 		    vha->vp_idx);
2165 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2166 
2167 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2168 			    false);
2169 		return;
2170 	}
2171 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2172 
2173 
2174 	if (sess->deleted) {
2175 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2176 		    false);
2177 		return;
2178 	}
2179 
2180 	rc = __qlt_24xx_handle_abts(vha, abts, sess);
2181 	if (rc != 0) {
2182 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2183 		    "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2184 		    vha->vp_idx, rc);
2185 		qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2186 		    false);
2187 		return;
2188 	}
2189 }
2190 
2191 /*
2192  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2193  */
2194 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2195 	struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2196 {
2197 	struct scsi_qla_host *ha = mcmd->vha;
2198 	struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2199 	struct ctio7_to_24xx *ctio;
2200 	uint16_t temp;
2201 
2202 	ql_dbg(ql_dbg_tgt, ha, 0xe008,
2203 	    "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2204 	    ha, atio, resp_code);
2205 
2206 
2207 	ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2208 	if (ctio == NULL) {
2209 		ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2210 		    "qla_target(%d): %s failed: unable to allocate "
2211 		    "request packet\n", ha->vp_idx, __func__);
2212 		return;
2213 	}
2214 
2215 	ctio->entry_type = CTIO_TYPE7;
2216 	ctio->entry_count = 1;
2217 	ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2218 	ctio->nport_handle = mcmd->sess->loop_id;
2219 	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2220 	ctio->vp_index = ha->vp_idx;
2221 	ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2222 	ctio->exchange_addr = atio->u.isp24.exchange_addr;
2223 	temp = (atio->u.isp24.attr << 9)|
2224 		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2225 	ctio->u.status1.flags = cpu_to_le16(temp);
2226 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2227 	ctio->u.status1.ox_id = cpu_to_le16(temp);
2228 	ctio->u.status1.scsi_status =
2229 	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2230 	ctio->u.status1.response_len = cpu_to_le16(8);
2231 	ctio->u.status1.sense_data[0] = resp_code;
2232 
2233 	/* Memory Barrier */
2234 	wmb();
2235 	if (qpair->reqq_start_iocbs)
2236 		qpair->reqq_start_iocbs(qpair);
2237 	else
2238 		qla2x00_start_iocbs(ha, qpair->req);
2239 }
2240 
2241 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2242 {
2243 	mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2244 }
2245 EXPORT_SYMBOL(qlt_free_mcmd);
2246 
2247 /*
2248  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2249  * reacquire
2250  */
2251 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2252     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2253 {
2254 	struct atio_from_isp *atio = &cmd->atio;
2255 	struct ctio7_to_24xx *ctio;
2256 	uint16_t temp;
2257 	struct scsi_qla_host *vha = cmd->vha;
2258 
2259 	ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2260 	    "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2261 	    "sense_key=%02x, asc=%02x, ascq=%02x",
2262 	    vha, atio, scsi_status, sense_key, asc, ascq);
2263 
2264 	ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2265 	if (!ctio) {
2266 		ql_dbg(ql_dbg_async, vha, 0x3067,
2267 		    "qla2x00t(%ld): %s failed: unable to allocate request packet",
2268 		    vha->host_no, __func__);
2269 		goto out;
2270 	}
2271 
2272 	ctio->entry_type = CTIO_TYPE7;
2273 	ctio->entry_count = 1;
2274 	ctio->handle = QLA_TGT_SKIP_HANDLE;
2275 	ctio->nport_handle = cmd->sess->loop_id;
2276 	ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2277 	ctio->vp_index = vha->vp_idx;
2278 	ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2279 	ctio->exchange_addr = atio->u.isp24.exchange_addr;
2280 	temp = (atio->u.isp24.attr << 9) |
2281 	    CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2282 	ctio->u.status1.flags = cpu_to_le16(temp);
2283 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2284 	ctio->u.status1.ox_id = cpu_to_le16(temp);
2285 	ctio->u.status1.scsi_status =
2286 	    cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2287 	ctio->u.status1.response_len = cpu_to_le16(18);
2288 	ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2289 
2290 	if (ctio->u.status1.residual != 0)
2291 		ctio->u.status1.scsi_status |=
2292 		    cpu_to_le16(SS_RESIDUAL_UNDER);
2293 
2294 	/* Fixed format sense data. */
2295 	ctio->u.status1.sense_data[0] = 0x70;
2296 	ctio->u.status1.sense_data[2] = sense_key;
2297 	/* Additional sense length */
2298 	ctio->u.status1.sense_data[7] = 0xa;
2299 	/* ASC and ASCQ */
2300 	ctio->u.status1.sense_data[12] = asc;
2301 	ctio->u.status1.sense_data[13] = ascq;
2302 
2303 	/* Memory Barrier */
2304 	wmb();
2305 
2306 	if (qpair->reqq_start_iocbs)
2307 		qpair->reqq_start_iocbs(qpair);
2308 	else
2309 		qla2x00_start_iocbs(vha, qpair->req);
2310 
2311 out:
2312 	return;
2313 }
2314 
2315 /* callback from target fabric module code */
2316 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2317 {
2318 	struct scsi_qla_host *vha = mcmd->sess->vha;
2319 	struct qla_hw_data *ha = vha->hw;
2320 	unsigned long flags;
2321 	struct qla_qpair *qpair = mcmd->qpair;
2322 	bool free_mcmd = true;
2323 
2324 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2325 	    "TM response mcmd (%p) status %#x state %#x",
2326 	    mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2327 
2328 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2329 
2330 	if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2331 		/*
2332 		 * Either the port is not online or this request was from
2333 		 * previous life, just abort the processing.
2334 		 */
2335 		ql_dbg(ql_dbg_async, vha, 0xe100,
2336 			"RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2337 			vha->flags.online, qla2x00_reset_active(vha),
2338 			mcmd->reset_count, qpair->chip_reset);
2339 		ha->tgt.tgt_ops->free_mcmd(mcmd);
2340 		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2341 		return;
2342 	}
2343 
2344 	if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2345 		switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2346 		case ELS_LOGO:
2347 		case ELS_PRLO:
2348 		case ELS_TPRLO:
2349 			ql_dbg(ql_dbg_disc, vha, 0x2106,
2350 			    "TM response logo %8phC status %#x state %#x",
2351 			    mcmd->sess->port_name, mcmd->fc_tm_rsp,
2352 			    mcmd->flags);
2353 			qlt_schedule_sess_for_deletion(mcmd->sess);
2354 			break;
2355 		default:
2356 			qlt_send_notify_ack(vha->hw->base_qpair,
2357 			    &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2358 			break;
2359 		}
2360 	} else {
2361 		if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2362 			qlt_build_abts_resp_iocb(mcmd);
2363 			free_mcmd = false;
2364 		} else
2365 			qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2366 			    mcmd->fc_tm_rsp);
2367 	}
2368 	/*
2369 	 * Make the callback for ->free_mcmd() to queue_work() and invoke
2370 	 * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2371 	 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2372 	 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2373 	 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2374 	 * qlt_xmit_tm_rsp() returns here..
2375 	 */
2376 	if (free_mcmd)
2377 		ha->tgt.tgt_ops->free_mcmd(mcmd);
2378 
2379 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2380 }
2381 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2382 
2383 /* No locks */
2384 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2385 {
2386 	struct qla_tgt_cmd *cmd = prm->cmd;
2387 
2388 	BUG_ON(cmd->sg_cnt == 0);
2389 
2390 	prm->sg = (struct scatterlist *)cmd->sg;
2391 	prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2392 	    cmd->sg_cnt, cmd->dma_data_direction);
2393 	if (unlikely(prm->seg_cnt == 0))
2394 		goto out_err;
2395 
2396 	prm->cmd->sg_mapped = 1;
2397 
2398 	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2399 		/*
2400 		 * If greater than four sg entries then we need to allocate
2401 		 * the continuation entries
2402 		 */
2403 		if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2404 			prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2405 			QLA_TGT_DATASEGS_PER_CMD_24XX,
2406 			QLA_TGT_DATASEGS_PER_CONT_24XX);
2407 	} else {
2408 		/* DIF */
2409 		if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2410 		    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2411 			prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2412 			prm->tot_dsds = prm->seg_cnt;
2413 		} else
2414 			prm->tot_dsds = prm->seg_cnt;
2415 
2416 		if (cmd->prot_sg_cnt) {
2417 			prm->prot_sg      = cmd->prot_sg;
2418 			prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2419 				cmd->prot_sg, cmd->prot_sg_cnt,
2420 				cmd->dma_data_direction);
2421 			if (unlikely(prm->prot_seg_cnt == 0))
2422 				goto out_err;
2423 
2424 			if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2425 			    (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2426 				/* Dif Bundling not support here */
2427 				prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2428 								cmd->blk_sz);
2429 				prm->tot_dsds += prm->prot_seg_cnt;
2430 			} else
2431 				prm->tot_dsds += prm->prot_seg_cnt;
2432 		}
2433 	}
2434 
2435 	return 0;
2436 
2437 out_err:
2438 	ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2439 	    "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2440 	    0, prm->cmd->sg_cnt);
2441 	return -1;
2442 }
2443 
2444 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2445 {
2446 	struct qla_hw_data *ha;
2447 	struct qla_qpair *qpair;
2448 
2449 	if (!cmd->sg_mapped)
2450 		return;
2451 
2452 	qpair = cmd->qpair;
2453 
2454 	dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2455 	    cmd->dma_data_direction);
2456 	cmd->sg_mapped = 0;
2457 
2458 	if (cmd->prot_sg_cnt)
2459 		dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2460 			cmd->dma_data_direction);
2461 
2462 	if (!cmd->ctx)
2463 		return;
2464 	ha = vha->hw;
2465 	if (cmd->ctx_dsd_alloced)
2466 		qla2x00_clean_dsd_pool(ha, cmd->ctx);
2467 
2468 	dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2469 }
2470 
2471 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2472 	uint32_t req_cnt)
2473 {
2474 	uint32_t cnt;
2475 	struct req_que *req = qpair->req;
2476 
2477 	if (req->cnt < (req_cnt + 2)) {
2478 		cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2479 		    RD_REG_DWORD_RELAXED(req->req_q_out));
2480 
2481 		if  (req->ring_index < cnt)
2482 			req->cnt = cnt - req->ring_index;
2483 		else
2484 			req->cnt = req->length - (req->ring_index - cnt);
2485 
2486 		if (unlikely(req->cnt < (req_cnt + 2)))
2487 			return -EAGAIN;
2488 	}
2489 
2490 	req->cnt -= req_cnt;
2491 
2492 	return 0;
2493 }
2494 
2495 /*
2496  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2497  */
2498 static inline void *qlt_get_req_pkt(struct req_que *req)
2499 {
2500 	/* Adjust ring index. */
2501 	req->ring_index++;
2502 	if (req->ring_index == req->length) {
2503 		req->ring_index = 0;
2504 		req->ring_ptr = req->ring;
2505 	} else {
2506 		req->ring_ptr++;
2507 	}
2508 	return (cont_entry_t *)req->ring_ptr;
2509 }
2510 
2511 /* ha->hardware_lock supposed to be held on entry */
2512 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2513 {
2514 	uint32_t h;
2515 	int index;
2516 	uint8_t found = 0;
2517 	struct req_que *req = qpair->req;
2518 
2519 	h = req->current_outstanding_cmd;
2520 
2521 	for (index = 1; index < req->num_outstanding_cmds; index++) {
2522 		h++;
2523 		if (h == req->num_outstanding_cmds)
2524 			h = 1;
2525 
2526 		if (h == QLA_TGT_SKIP_HANDLE)
2527 			continue;
2528 
2529 		if (!req->outstanding_cmds[h]) {
2530 			found = 1;
2531 			break;
2532 		}
2533 	}
2534 
2535 	if (found) {
2536 		req->current_outstanding_cmd = h;
2537 	} else {
2538 		ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2539 		    "qla_target(%d): Ran out of empty cmd slots\n",
2540 		    qpair->vha->vp_idx);
2541 		h = QLA_TGT_NULL_HANDLE;
2542 	}
2543 
2544 	return h;
2545 }
2546 
2547 /* ha->hardware_lock supposed to be held on entry */
2548 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2549 	struct qla_tgt_prm *prm)
2550 {
2551 	uint32_t h;
2552 	struct ctio7_to_24xx *pkt;
2553 	struct atio_from_isp *atio = &prm->cmd->atio;
2554 	uint16_t temp;
2555 
2556 	pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2557 	prm->pkt = pkt;
2558 	memset(pkt, 0, sizeof(*pkt));
2559 
2560 	pkt->entry_type = CTIO_TYPE7;
2561 	pkt->entry_count = (uint8_t)prm->req_cnt;
2562 	pkt->vp_index = prm->cmd->vp_idx;
2563 
2564 	h = qlt_make_handle(qpair);
2565 	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2566 		/*
2567 		 * CTIO type 7 from the firmware doesn't provide a way to
2568 		 * know the initiator's LOOP ID, hence we can't find
2569 		 * the session and, so, the command.
2570 		 */
2571 		return -EAGAIN;
2572 	} else
2573 		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2574 
2575 	pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2576 	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2577 	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2578 	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2579 	pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2580 	pkt->exchange_addr = atio->u.isp24.exchange_addr;
2581 	temp = atio->u.isp24.attr << 9;
2582 	pkt->u.status0.flags |= cpu_to_le16(temp);
2583 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2584 	pkt->u.status0.ox_id = cpu_to_le16(temp);
2585 	pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2586 
2587 	return 0;
2588 }
2589 
2590 /*
2591  * ha->hardware_lock supposed to be held on entry. We have already made sure
2592  * that there is sufficient amount of request entries to not drop it.
2593  */
2594 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2595 {
2596 	int cnt;
2597 	struct dsd64 *cur_dsd;
2598 
2599 	/* Build continuation packets */
2600 	while (prm->seg_cnt > 0) {
2601 		cont_a64_entry_t *cont_pkt64 =
2602 			(cont_a64_entry_t *)qlt_get_req_pkt(
2603 			   prm->cmd->qpair->req);
2604 
2605 		/*
2606 		 * Make sure that from cont_pkt64 none of
2607 		 * 64-bit specific fields used for 32-bit
2608 		 * addressing. Cast to (cont_entry_t *) for
2609 		 * that.
2610 		 */
2611 
2612 		memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2613 
2614 		cont_pkt64->entry_count = 1;
2615 		cont_pkt64->sys_define = 0;
2616 
2617 		cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2618 		cur_dsd = cont_pkt64->dsd;
2619 
2620 		/* Load continuation entry data segments */
2621 		for (cnt = 0;
2622 		    cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2623 		    cnt++, prm->seg_cnt--) {
2624 			append_dsd64(&cur_dsd, prm->sg);
2625 			prm->sg = sg_next(prm->sg);
2626 		}
2627 	}
2628 }
2629 
2630 /*
2631  * ha->hardware_lock supposed to be held on entry. We have already made sure
2632  * that there is sufficient amount of request entries to not drop it.
2633  */
2634 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2635 {
2636 	int cnt;
2637 	struct dsd64 *cur_dsd;
2638 	struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2639 
2640 	pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2641 
2642 	/* Setup packet address segment pointer */
2643 	cur_dsd = &pkt24->u.status0.dsd;
2644 
2645 	/* Set total data segment count */
2646 	if (prm->seg_cnt)
2647 		pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2648 
2649 	if (prm->seg_cnt == 0) {
2650 		/* No data transfer */
2651 		cur_dsd->address = 0;
2652 		cur_dsd->length = 0;
2653 		return;
2654 	}
2655 
2656 	/* If scatter gather */
2657 
2658 	/* Load command entry data segments */
2659 	for (cnt = 0;
2660 	    (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2661 	    cnt++, prm->seg_cnt--) {
2662 		append_dsd64(&cur_dsd, prm->sg);
2663 		prm->sg = sg_next(prm->sg);
2664 	}
2665 
2666 	qlt_load_cont_data_segments(prm);
2667 }
2668 
2669 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2670 {
2671 	return cmd->bufflen > 0;
2672 }
2673 
2674 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2675 {
2676 	struct qla_tgt_cmd *cmd;
2677 	struct scsi_qla_host *vha;
2678 
2679 	/* asc 0x10=dif error */
2680 	if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2681 		cmd = prm->cmd;
2682 		vha = cmd->vha;
2683 		/* ASCQ */
2684 		switch (prm->sense_buffer[13]) {
2685 		case 1:
2686 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2687 			    "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2688 			    "se_cmd=%p tag[%x]",
2689 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2690 			    cmd->atio.u.isp24.exchange_addr);
2691 			break;
2692 		case 2:
2693 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2694 			    "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2695 			    "se_cmd=%p tag[%x]",
2696 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2697 			    cmd->atio.u.isp24.exchange_addr);
2698 			break;
2699 		case 3:
2700 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2701 			    "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2702 			    "se_cmd=%p tag[%x]",
2703 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2704 			    cmd->atio.u.isp24.exchange_addr);
2705 			break;
2706 		default:
2707 			ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2708 			    "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2709 			    "se_cmd=%p tag[%x]",
2710 			    cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2711 			    cmd->atio.u.isp24.exchange_addr);
2712 			break;
2713 		}
2714 		ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2715 	}
2716 }
2717 
2718 /*
2719  * Called without ha->hardware_lock held
2720  */
2721 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2722 	struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2723 	uint32_t *full_req_cnt)
2724 {
2725 	struct se_cmd *se_cmd = &cmd->se_cmd;
2726 	struct qla_qpair *qpair = cmd->qpair;
2727 
2728 	prm->cmd = cmd;
2729 	prm->tgt = cmd->tgt;
2730 	prm->pkt = NULL;
2731 	prm->rq_result = scsi_status;
2732 	prm->sense_buffer = &cmd->sense_buffer[0];
2733 	prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2734 	prm->sg = NULL;
2735 	prm->seg_cnt = -1;
2736 	prm->req_cnt = 1;
2737 	prm->residual = 0;
2738 	prm->add_status_pkt = 0;
2739 	prm->prot_sg = NULL;
2740 	prm->prot_seg_cnt = 0;
2741 	prm->tot_dsds = 0;
2742 
2743 	if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2744 		if  (qlt_pci_map_calc_cnt(prm) != 0)
2745 			return -EAGAIN;
2746 	}
2747 
2748 	*full_req_cnt = prm->req_cnt;
2749 
2750 	if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2751 		prm->residual = se_cmd->residual_count;
2752 		ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2753 		    "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2754 		       prm->residual, se_cmd->tag,
2755 		       se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2756 		       cmd->bufflen, prm->rq_result);
2757 		prm->rq_result |= SS_RESIDUAL_UNDER;
2758 	} else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2759 		prm->residual = se_cmd->residual_count;
2760 		ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2761 		    "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2762 		       prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2763 		       se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2764 		prm->rq_result |= SS_RESIDUAL_OVER;
2765 	}
2766 
2767 	if (xmit_type & QLA_TGT_XMIT_STATUS) {
2768 		/*
2769 		 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2770 		 * ignored in *xmit_response() below
2771 		 */
2772 		if (qlt_has_data(cmd)) {
2773 			if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2774 			    (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2775 			    (prm->rq_result != 0))) {
2776 				prm->add_status_pkt = 1;
2777 				(*full_req_cnt)++;
2778 			}
2779 		}
2780 	}
2781 
2782 	return 0;
2783 }
2784 
2785 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2786     int sending_sense)
2787 {
2788 	if (cmd->qpair->enable_class_2)
2789 		return 0;
2790 
2791 	if (sending_sense)
2792 		return cmd->conf_compl_supported;
2793 	else
2794 		return cmd->qpair->enable_explicit_conf &&
2795                     cmd->conf_compl_supported;
2796 }
2797 
2798 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2799 	struct qla_tgt_prm *prm)
2800 {
2801 	prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2802 	    (uint32_t)sizeof(ctio->u.status1.sense_data));
2803 	ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2804 	if (qlt_need_explicit_conf(prm->cmd, 0)) {
2805 		ctio->u.status0.flags |= cpu_to_le16(
2806 		    CTIO7_FLAGS_EXPLICIT_CONFORM |
2807 		    CTIO7_FLAGS_CONFORM_REQ);
2808 	}
2809 	ctio->u.status0.residual = cpu_to_le32(prm->residual);
2810 	ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2811 	if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2812 		int i;
2813 
2814 		if (qlt_need_explicit_conf(prm->cmd, 1)) {
2815 			if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2816 				ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2817 				    "Skipping EXPLICIT_CONFORM and "
2818 				    "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2819 				    "non GOOD status\n");
2820 				goto skip_explict_conf;
2821 			}
2822 			ctio->u.status1.flags |= cpu_to_le16(
2823 			    CTIO7_FLAGS_EXPLICIT_CONFORM |
2824 			    CTIO7_FLAGS_CONFORM_REQ);
2825 		}
2826 skip_explict_conf:
2827 		ctio->u.status1.flags &=
2828 		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2829 		ctio->u.status1.flags |=
2830 		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2831 		ctio->u.status1.scsi_status |=
2832 		    cpu_to_le16(SS_SENSE_LEN_VALID);
2833 		ctio->u.status1.sense_length =
2834 		    cpu_to_le16(prm->sense_buffer_len);
2835 		for (i = 0; i < prm->sense_buffer_len/4; i++)
2836 			((uint32_t *)ctio->u.status1.sense_data)[i] =
2837 				cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2838 
2839 		qlt_print_dif_err(prm);
2840 
2841 	} else {
2842 		ctio->u.status1.flags &=
2843 		    ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2844 		ctio->u.status1.flags |=
2845 		    cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2846 		ctio->u.status1.sense_length = 0;
2847 		memset(ctio->u.status1.sense_data, 0,
2848 		    sizeof(ctio->u.status1.sense_data));
2849 	}
2850 
2851 	/* Sense with len > 24, is it possible ??? */
2852 }
2853 
2854 static inline int
2855 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2856 {
2857 	switch (se_cmd->prot_op) {
2858 	case TARGET_PROT_DOUT_INSERT:
2859 	case TARGET_PROT_DIN_STRIP:
2860 		if (ql2xenablehba_err_chk >= 1)
2861 			return 1;
2862 		break;
2863 	case TARGET_PROT_DOUT_PASS:
2864 	case TARGET_PROT_DIN_PASS:
2865 		if (ql2xenablehba_err_chk >= 2)
2866 			return 1;
2867 		break;
2868 	case TARGET_PROT_DIN_INSERT:
2869 	case TARGET_PROT_DOUT_STRIP:
2870 		return 1;
2871 	default:
2872 		break;
2873 	}
2874 	return 0;
2875 }
2876 
2877 static inline int
2878 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2879 {
2880 	switch (se_cmd->prot_op) {
2881 	case TARGET_PROT_DIN_INSERT:
2882 	case TARGET_PROT_DOUT_INSERT:
2883 	case TARGET_PROT_DIN_STRIP:
2884 	case TARGET_PROT_DOUT_STRIP:
2885 	case TARGET_PROT_DIN_PASS:
2886 	case TARGET_PROT_DOUT_PASS:
2887 	    return 1;
2888 	default:
2889 	    return 0;
2890 	}
2891 	return 0;
2892 }
2893 
2894 /*
2895  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2896  */
2897 static void
2898 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2899     uint16_t *pfw_prot_opts)
2900 {
2901 	struct se_cmd *se_cmd = &cmd->se_cmd;
2902 	uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2903 	scsi_qla_host_t *vha = cmd->tgt->vha;
2904 	struct qla_hw_data *ha = vha->hw;
2905 	uint32_t t32 = 0;
2906 
2907 	/*
2908 	 * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2909 	 * have been immplemented by TCM, before AppTag is avail.
2910 	 * Look for modesense_handlers[]
2911 	 */
2912 	ctx->app_tag = 0;
2913 	ctx->app_tag_mask[0] = 0x0;
2914 	ctx->app_tag_mask[1] = 0x0;
2915 
2916 	if (IS_PI_UNINIT_CAPABLE(ha)) {
2917 		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2918 		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2919 			*pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2920 		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2921 			*pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2922 	}
2923 
2924 	t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2925 
2926 	switch (se_cmd->prot_type) {
2927 	case TARGET_DIF_TYPE0_PROT:
2928 		/*
2929 		 * No check for ql2xenablehba_err_chk, as it
2930 		 * would be an I/O error if hba tag generation
2931 		 * is not done.
2932 		 */
2933 		ctx->ref_tag = cpu_to_le32(lba);
2934 		/* enable ALL bytes of the ref tag */
2935 		ctx->ref_tag_mask[0] = 0xff;
2936 		ctx->ref_tag_mask[1] = 0xff;
2937 		ctx->ref_tag_mask[2] = 0xff;
2938 		ctx->ref_tag_mask[3] = 0xff;
2939 		break;
2940 	case TARGET_DIF_TYPE1_PROT:
2941 	    /*
2942 	     * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2943 	     * REF tag, and 16 bit app tag.
2944 	     */
2945 	    ctx->ref_tag = cpu_to_le32(lba);
2946 	    if (!qla_tgt_ref_mask_check(se_cmd) ||
2947 		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2948 		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2949 		    break;
2950 	    }
2951 	    /* enable ALL bytes of the ref tag */
2952 	    ctx->ref_tag_mask[0] = 0xff;
2953 	    ctx->ref_tag_mask[1] = 0xff;
2954 	    ctx->ref_tag_mask[2] = 0xff;
2955 	    ctx->ref_tag_mask[3] = 0xff;
2956 	    break;
2957 	case TARGET_DIF_TYPE2_PROT:
2958 	    /*
2959 	     * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2960 	     * tag has to match LBA in CDB + N
2961 	     */
2962 	    ctx->ref_tag = cpu_to_le32(lba);
2963 	    if (!qla_tgt_ref_mask_check(se_cmd) ||
2964 		!(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2965 		    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2966 		    break;
2967 	    }
2968 	    /* enable ALL bytes of the ref tag */
2969 	    ctx->ref_tag_mask[0] = 0xff;
2970 	    ctx->ref_tag_mask[1] = 0xff;
2971 	    ctx->ref_tag_mask[2] = 0xff;
2972 	    ctx->ref_tag_mask[3] = 0xff;
2973 	    break;
2974 	case TARGET_DIF_TYPE3_PROT:
2975 	    /* For TYPE 3 protection: 16 bit GUARD only */
2976 	    *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2977 	    ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2978 		ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2979 	    break;
2980 	}
2981 }
2982 
2983 static inline int
2984 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2985 {
2986 	struct dsd64		*cur_dsd;
2987 	uint32_t		transfer_length = 0;
2988 	uint32_t		data_bytes;
2989 	uint32_t		dif_bytes;
2990 	uint8_t			bundling = 1;
2991 	struct crc_context	*crc_ctx_pkt = NULL;
2992 	struct qla_hw_data	*ha;
2993 	struct ctio_crc2_to_fw	*pkt;
2994 	dma_addr_t		crc_ctx_dma;
2995 	uint16_t		fw_prot_opts = 0;
2996 	struct qla_tgt_cmd	*cmd = prm->cmd;
2997 	struct se_cmd		*se_cmd = &cmd->se_cmd;
2998 	uint32_t h;
2999 	struct atio_from_isp *atio = &prm->cmd->atio;
3000 	struct qla_tc_param	tc;
3001 	uint16_t t16;
3002 	scsi_qla_host_t *vha = cmd->vha;
3003 
3004 	ha = vha->hw;
3005 
3006 	pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3007 	prm->pkt = pkt;
3008 	memset(pkt, 0, sizeof(*pkt));
3009 
3010 	ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3011 		"qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3012 		cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3013 		prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3014 
3015 	if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3016 	    (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3017 		bundling = 0;
3018 
3019 	/* Compute dif len and adjust data len to incude protection */
3020 	data_bytes = cmd->bufflen;
3021 	dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3022 
3023 	switch (se_cmd->prot_op) {
3024 	case TARGET_PROT_DIN_INSERT:
3025 	case TARGET_PROT_DOUT_STRIP:
3026 		transfer_length = data_bytes;
3027 		if (cmd->prot_sg_cnt)
3028 			data_bytes += dif_bytes;
3029 		break;
3030 	case TARGET_PROT_DIN_STRIP:
3031 	case TARGET_PROT_DOUT_INSERT:
3032 	case TARGET_PROT_DIN_PASS:
3033 	case TARGET_PROT_DOUT_PASS:
3034 		transfer_length = data_bytes + dif_bytes;
3035 		break;
3036 	default:
3037 		BUG();
3038 		break;
3039 	}
3040 
3041 	if (!qlt_hba_err_chk_enabled(se_cmd))
3042 		fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3043 	/* HBA error checking enabled */
3044 	else if (IS_PI_UNINIT_CAPABLE(ha)) {
3045 		if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3046 		    (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3047 			fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3048 		else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3049 			fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3050 	}
3051 
3052 	switch (se_cmd->prot_op) {
3053 	case TARGET_PROT_DIN_INSERT:
3054 	case TARGET_PROT_DOUT_INSERT:
3055 		fw_prot_opts |= PO_MODE_DIF_INSERT;
3056 		break;
3057 	case TARGET_PROT_DIN_STRIP:
3058 	case TARGET_PROT_DOUT_STRIP:
3059 		fw_prot_opts |= PO_MODE_DIF_REMOVE;
3060 		break;
3061 	case TARGET_PROT_DIN_PASS:
3062 	case TARGET_PROT_DOUT_PASS:
3063 		fw_prot_opts |= PO_MODE_DIF_PASS;
3064 		/* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3065 		break;
3066 	default:/* Normal Request */
3067 		fw_prot_opts |= PO_MODE_DIF_PASS;
3068 		break;
3069 	}
3070 
3071 	/* ---- PKT ---- */
3072 	/* Update entry type to indicate Command Type CRC_2 IOCB */
3073 	pkt->entry_type  = CTIO_CRC2;
3074 	pkt->entry_count = 1;
3075 	pkt->vp_index = cmd->vp_idx;
3076 
3077 	h = qlt_make_handle(qpair);
3078 	if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3079 		/*
3080 		 * CTIO type 7 from the firmware doesn't provide a way to
3081 		 * know the initiator's LOOP ID, hence we can't find
3082 		 * the session and, so, the command.
3083 		 */
3084 		return -EAGAIN;
3085 	} else
3086 		qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3087 
3088 	pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3089 	pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3090 	pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3091 	pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3092 	pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3093 	pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3094 
3095 	/* silence compile warning */
3096 	t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3097 	pkt->ox_id  = cpu_to_le16(t16);
3098 
3099 	t16 = (atio->u.isp24.attr << 9);
3100 	pkt->flags |= cpu_to_le16(t16);
3101 	pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3102 
3103 	/* Set transfer direction */
3104 	if (cmd->dma_data_direction == DMA_TO_DEVICE)
3105 		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3106 	else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3107 		pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3108 
3109 	pkt->dseg_count = prm->tot_dsds;
3110 	/* Fibre channel byte count */
3111 	pkt->transfer_length = cpu_to_le32(transfer_length);
3112 
3113 	/* ----- CRC context -------- */
3114 
3115 	/* Allocate CRC context from global pool */
3116 	crc_ctx_pkt = cmd->ctx =
3117 	    dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3118 
3119 	if (!crc_ctx_pkt)
3120 		goto crc_queuing_error;
3121 
3122 	crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3123 	INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3124 
3125 	/* Set handle */
3126 	crc_ctx_pkt->handle = pkt->handle;
3127 
3128 	qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3129 
3130 	put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3131 	pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3132 
3133 	if (!bundling) {
3134 		cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3135 	} else {
3136 		/*
3137 		 * Configure Bundling if we need to fetch interlaving
3138 		 * protection PCI accesses
3139 		 */
3140 		fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3141 		crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3142 		crc_ctx_pkt->u.bundling.dseg_count =
3143 			cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3144 		cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3145 	}
3146 
3147 	/* Finish the common fields of CRC pkt */
3148 	crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3149 	crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3150 	crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3151 	crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3152 
3153 	memset((uint8_t *)&tc, 0 , sizeof(tc));
3154 	tc.vha = vha;
3155 	tc.blk_sz = cmd->blk_sz;
3156 	tc.bufflen = cmd->bufflen;
3157 	tc.sg = cmd->sg;
3158 	tc.prot_sg = cmd->prot_sg;
3159 	tc.ctx = crc_ctx_pkt;
3160 	tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3161 
3162 	/* Walks data segments */
3163 	pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3164 
3165 	if (!bundling && prm->prot_seg_cnt) {
3166 		if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3167 			prm->tot_dsds, &tc))
3168 			goto crc_queuing_error;
3169 	} else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3170 		(prm->tot_dsds - prm->prot_seg_cnt), &tc))
3171 		goto crc_queuing_error;
3172 
3173 	if (bundling && prm->prot_seg_cnt) {
3174 		/* Walks dif segments */
3175 		pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3176 
3177 		cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3178 		if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3179 			prm->prot_seg_cnt, cmd))
3180 			goto crc_queuing_error;
3181 	}
3182 	return QLA_SUCCESS;
3183 
3184 crc_queuing_error:
3185 	/* Cleanup will be performed by the caller */
3186 	qpair->req->outstanding_cmds[h] = NULL;
3187 
3188 	return QLA_FUNCTION_FAILED;
3189 }
3190 
3191 /*
3192  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3193  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3194  */
3195 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3196 	uint8_t scsi_status)
3197 {
3198 	struct scsi_qla_host *vha = cmd->vha;
3199 	struct qla_qpair *qpair = cmd->qpair;
3200 	struct ctio7_to_24xx *pkt;
3201 	struct qla_tgt_prm prm;
3202 	uint32_t full_req_cnt = 0;
3203 	unsigned long flags = 0;
3204 	int res;
3205 
3206 	if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3207 	    (cmd->sess && cmd->sess->deleted)) {
3208 		cmd->state = QLA_TGT_STATE_PROCESSED;
3209 		res = 0;
3210 		goto free;
3211 	}
3212 
3213 	ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3214 	    "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3215 	    (xmit_type & QLA_TGT_XMIT_STATUS) ?
3216 	    1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3217 	    &cmd->se_cmd, qpair->id);
3218 
3219 	res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3220 	    &full_req_cnt);
3221 	if (unlikely(res != 0))
3222 		goto free;
3223 
3224 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3225 
3226 	if (xmit_type == QLA_TGT_XMIT_STATUS)
3227 		qpair->tgt_counters.core_qla_snd_status++;
3228 	else
3229 		qpair->tgt_counters.core_qla_que_buf++;
3230 
3231 	if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3232 		/*
3233 		 * Either the port is not online or this request was from
3234 		 * previous life, just abort the processing.
3235 		 */
3236 		cmd->state = QLA_TGT_STATE_PROCESSED;
3237 		ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3238 			"RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3239 			vha->flags.online, qla2x00_reset_active(vha),
3240 			cmd->reset_count, qpair->chip_reset);
3241 		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3242 		res = 0;
3243 		goto free;
3244 	}
3245 
3246 	/* Does F/W have an IOCBs for this request */
3247 	res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3248 	if (unlikely(res))
3249 		goto out_unmap_unlock;
3250 
3251 	if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3252 		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3253 	else
3254 		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3255 	if (unlikely(res != 0)) {
3256 		qpair->req->cnt += full_req_cnt;
3257 		goto out_unmap_unlock;
3258 	}
3259 
3260 	pkt = (struct ctio7_to_24xx *)prm.pkt;
3261 
3262 	if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3263 		pkt->u.status0.flags |=
3264 		    cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3265 			CTIO7_FLAGS_STATUS_MODE_0);
3266 
3267 		if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3268 			qlt_load_data_segments(&prm);
3269 
3270 		if (prm.add_status_pkt == 0) {
3271 			if (xmit_type & QLA_TGT_XMIT_STATUS) {
3272 				pkt->u.status0.scsi_status =
3273 				    cpu_to_le16(prm.rq_result);
3274 				pkt->u.status0.residual =
3275 				    cpu_to_le32(prm.residual);
3276 				pkt->u.status0.flags |= cpu_to_le16(
3277 				    CTIO7_FLAGS_SEND_STATUS);
3278 				if (qlt_need_explicit_conf(cmd, 0)) {
3279 					pkt->u.status0.flags |=
3280 					    cpu_to_le16(
3281 						CTIO7_FLAGS_EXPLICIT_CONFORM |
3282 						CTIO7_FLAGS_CONFORM_REQ);
3283 				}
3284 			}
3285 
3286 		} else {
3287 			/*
3288 			 * We have already made sure that there is sufficient
3289 			 * amount of request entries to not drop HW lock in
3290 			 * req_pkt().
3291 			 */
3292 			struct ctio7_to_24xx *ctio =
3293 				(struct ctio7_to_24xx *)qlt_get_req_pkt(
3294 				    qpair->req);
3295 
3296 			ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3297 			    "Building additional status packet 0x%p.\n",
3298 			    ctio);
3299 
3300 			/*
3301 			 * T10Dif: ctio_crc2_to_fw overlay ontop of
3302 			 * ctio7_to_24xx
3303 			 */
3304 			memcpy(ctio, pkt, sizeof(*ctio));
3305 			/* reset back to CTIO7 */
3306 			ctio->entry_count = 1;
3307 			ctio->entry_type = CTIO_TYPE7;
3308 			ctio->dseg_count = 0;
3309 			ctio->u.status1.flags &= ~cpu_to_le16(
3310 			    CTIO7_FLAGS_DATA_IN);
3311 
3312 			/* Real finish is ctio_m1's finish */
3313 			pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3314 			pkt->u.status0.flags |= cpu_to_le16(
3315 			    CTIO7_FLAGS_DONT_RET_CTIO);
3316 
3317 			/* qlt_24xx_init_ctio_to_isp will correct
3318 			 * all neccessary fields that's part of CTIO7.
3319 			 * There should be no residual of CTIO-CRC2 data.
3320 			 */
3321 			qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3322 			    &prm);
3323 		}
3324 	} else
3325 		qlt_24xx_init_ctio_to_isp(pkt, &prm);
3326 
3327 
3328 	cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3329 	cmd->cmd_sent_to_fw = 1;
3330 	cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3331 
3332 	/* Memory Barrier */
3333 	wmb();
3334 	if (qpair->reqq_start_iocbs)
3335 		qpair->reqq_start_iocbs(qpair);
3336 	else
3337 		qla2x00_start_iocbs(vha, qpair->req);
3338 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3339 
3340 	return 0;
3341 
3342 out_unmap_unlock:
3343 	qlt_unmap_sg(vha, cmd);
3344 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3345 
3346 free:
3347 	vha->hw->tgt.tgt_ops->free_cmd(cmd);
3348 	return res;
3349 }
3350 EXPORT_SYMBOL(qlt_xmit_response);
3351 
3352 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3353 {
3354 	struct ctio7_to_24xx *pkt;
3355 	struct scsi_qla_host *vha = cmd->vha;
3356 	struct qla_tgt *tgt = cmd->tgt;
3357 	struct qla_tgt_prm prm;
3358 	unsigned long flags = 0;
3359 	int res = 0;
3360 	struct qla_qpair *qpair = cmd->qpair;
3361 
3362 	memset(&prm, 0, sizeof(prm));
3363 	prm.cmd = cmd;
3364 	prm.tgt = tgt;
3365 	prm.sg = NULL;
3366 	prm.req_cnt = 1;
3367 
3368 	/* Calculate number of entries and segments required */
3369 	if (qlt_pci_map_calc_cnt(&prm) != 0)
3370 		return -EAGAIN;
3371 
3372 	if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3373 	    (cmd->sess && cmd->sess->deleted)) {
3374 		/*
3375 		 * Either the port is not online or this request was from
3376 		 * previous life, just abort the processing.
3377 		 */
3378 		cmd->aborted = 1;
3379 		cmd->write_data_transferred = 0;
3380 		cmd->state = QLA_TGT_STATE_DATA_IN;
3381 		vha->hw->tgt.tgt_ops->handle_data(cmd);
3382 		ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3383 			"RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3384 			vha->flags.online, qla2x00_reset_active(vha),
3385 			cmd->reset_count, qpair->chip_reset);
3386 		return 0;
3387 	}
3388 
3389 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3390 	/* Does F/W have an IOCBs for this request */
3391 	res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3392 	if (res != 0)
3393 		goto out_unlock_free_unmap;
3394 	if (cmd->se_cmd.prot_op)
3395 		res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3396 	else
3397 		res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3398 
3399 	if (unlikely(res != 0)) {
3400 		qpair->req->cnt += prm.req_cnt;
3401 		goto out_unlock_free_unmap;
3402 	}
3403 
3404 	pkt = (struct ctio7_to_24xx *)prm.pkt;
3405 	pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3406 	    CTIO7_FLAGS_STATUS_MODE_0);
3407 
3408 	if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3409 		qlt_load_data_segments(&prm);
3410 
3411 	cmd->state = QLA_TGT_STATE_NEED_DATA;
3412 	cmd->cmd_sent_to_fw = 1;
3413 	cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3414 
3415 	/* Memory Barrier */
3416 	wmb();
3417 	if (qpair->reqq_start_iocbs)
3418 		qpair->reqq_start_iocbs(qpair);
3419 	else
3420 		qla2x00_start_iocbs(vha, qpair->req);
3421 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3422 
3423 	return res;
3424 
3425 out_unlock_free_unmap:
3426 	qlt_unmap_sg(vha, cmd);
3427 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3428 
3429 	return res;
3430 }
3431 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3432 
3433 
3434 /*
3435  * it is assumed either hardware_lock or qpair lock is held.
3436  */
3437 static void
3438 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3439 	struct ctio_crc_from_fw *sts)
3440 {
3441 	uint8_t		*ap = &sts->actual_dif[0];
3442 	uint8_t		*ep = &sts->expected_dif[0];
3443 	uint64_t	lba = cmd->se_cmd.t_task_lba;
3444 	uint8_t scsi_status, sense_key, asc, ascq;
3445 	unsigned long flags;
3446 	struct scsi_qla_host *vha = cmd->vha;
3447 
3448 	cmd->trc_flags |= TRC_DIF_ERR;
3449 
3450 	cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3451 	cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3452 	cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3453 
3454 	cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3455 	cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3456 	cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3457 
3458 	ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3459 	    "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3460 
3461 	scsi_status = sense_key = asc = ascq = 0;
3462 
3463 	/* check appl tag */
3464 	if (cmd->e_app_tag != cmd->a_app_tag) {
3465 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3466 		    "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]",
3467 		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3468 		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3469 		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3470 		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3471 
3472 		cmd->dif_err_code = DIF_ERR_APP;
3473 		scsi_status = SAM_STAT_CHECK_CONDITION;
3474 		sense_key = ABORTED_COMMAND;
3475 		asc = 0x10;
3476 		ascq = 0x2;
3477 	}
3478 
3479 	/* check ref tag */
3480 	if (cmd->e_ref_tag != cmd->a_ref_tag) {
3481 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3482 		    "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] ",
3483 		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3484 		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3485 		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3486 		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3487 
3488 		cmd->dif_err_code = DIF_ERR_REF;
3489 		scsi_status = SAM_STAT_CHECK_CONDITION;
3490 		sense_key = ABORTED_COMMAND;
3491 		asc = 0x10;
3492 		ascq = 0x3;
3493 		goto out;
3494 	}
3495 
3496 	/* check guard */
3497 	if (cmd->e_guard != cmd->a_guard) {
3498 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3499 		    "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]",
3500 		    cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3501 		    cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3502 		    cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3503 		    cmd->atio.u.isp24.fcp_hdr.ox_id);
3504 
3505 		cmd->dif_err_code = DIF_ERR_GRD;
3506 		scsi_status = SAM_STAT_CHECK_CONDITION;
3507 		sense_key = ABORTED_COMMAND;
3508 		asc = 0x10;
3509 		ascq = 0x1;
3510 	}
3511 out:
3512 	switch (cmd->state) {
3513 	case QLA_TGT_STATE_NEED_DATA:
3514 		/* handle_data will load DIF error code  */
3515 		cmd->state = QLA_TGT_STATE_DATA_IN;
3516 		vha->hw->tgt.tgt_ops->handle_data(cmd);
3517 		break;
3518 	default:
3519 		spin_lock_irqsave(&cmd->cmd_lock, flags);
3520 		if (cmd->aborted) {
3521 			spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3522 			vha->hw->tgt.tgt_ops->free_cmd(cmd);
3523 			break;
3524 		}
3525 		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3526 
3527 		qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3528 		    ascq);
3529 		/* assume scsi status gets out on the wire.
3530 		 * Will not wait for completion.
3531 		 */
3532 		vha->hw->tgt.tgt_ops->free_cmd(cmd);
3533 		break;
3534 	}
3535 }
3536 
3537 /* If hardware_lock held on entry, might drop it, then reaquire */
3538 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3539 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3540 	struct imm_ntfy_from_isp *ntfy)
3541 {
3542 	struct nack_to_isp *nack;
3543 	struct qla_hw_data *ha = vha->hw;
3544 	request_t *pkt;
3545 	int ret = 0;
3546 
3547 	ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3548 	    "Sending TERM ELS CTIO (ha=%p)\n", ha);
3549 
3550 	pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3551 	if (pkt == NULL) {
3552 		ql_dbg(ql_dbg_tgt, vha, 0xe080,
3553 		    "qla_target(%d): %s failed: unable to allocate "
3554 		    "request packet\n", vha->vp_idx, __func__);
3555 		return -ENOMEM;
3556 	}
3557 
3558 	pkt->entry_type = NOTIFY_ACK_TYPE;
3559 	pkt->entry_count = 1;
3560 	pkt->handle = QLA_TGT_SKIP_HANDLE;
3561 
3562 	nack = (struct nack_to_isp *)pkt;
3563 	nack->ox_id = ntfy->ox_id;
3564 
3565 	nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3566 	if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3567 		nack->u.isp24.flags = ntfy->u.isp24.flags &
3568 			__constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3569 	}
3570 
3571 	/* terminate */
3572 	nack->u.isp24.flags |=
3573 		__constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3574 
3575 	nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3576 	nack->u.isp24.status = ntfy->u.isp24.status;
3577 	nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3578 	nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3579 	nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3580 	nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3581 	nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3582 	nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3583 
3584 	qla2x00_start_iocbs(vha, vha->req);
3585 	return ret;
3586 }
3587 
3588 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3589 	struct imm_ntfy_from_isp *imm, int ha_locked)
3590 {
3591 	int rc;
3592 
3593 	WARN_ON_ONCE(!ha_locked);
3594 	rc = __qlt_send_term_imm_notif(vha, imm);
3595 	pr_debug("rc = %d\n", rc);
3596 }
3597 
3598 /*
3599  * If hardware_lock held on entry, might drop it, then reaquire
3600  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3601  */
3602 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3603 	struct qla_tgt_cmd *cmd,
3604 	struct atio_from_isp *atio)
3605 {
3606 	struct scsi_qla_host *vha = qpair->vha;
3607 	struct ctio7_to_24xx *ctio24;
3608 	struct qla_hw_data *ha = vha->hw;
3609 	request_t *pkt;
3610 	int ret = 0;
3611 	uint16_t temp;
3612 
3613 	ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3614 
3615 	if (cmd)
3616 		vha = cmd->vha;
3617 
3618 	pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3619 	if (pkt == NULL) {
3620 		ql_dbg(ql_dbg_tgt, vha, 0xe050,
3621 		    "qla_target(%d): %s failed: unable to allocate "
3622 		    "request packet\n", vha->vp_idx, __func__);
3623 		return -ENOMEM;
3624 	}
3625 
3626 	if (cmd != NULL) {
3627 		if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3628 			ql_dbg(ql_dbg_tgt, vha, 0xe051,
3629 			    "qla_target(%d): Terminating cmd %p with "
3630 			    "incorrect state %d\n", vha->vp_idx, cmd,
3631 			    cmd->state);
3632 		} else
3633 			ret = 1;
3634 	}
3635 
3636 	qpair->tgt_counters.num_term_xchg_sent++;
3637 	pkt->entry_count = 1;
3638 	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3639 
3640 	ctio24 = (struct ctio7_to_24xx *)pkt;
3641 	ctio24->entry_type = CTIO_TYPE7;
3642 	ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3643 	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3644 	ctio24->vp_index = vha->vp_idx;
3645 	ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3646 	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3647 	temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3648 		CTIO7_FLAGS_TERMINATE;
3649 	ctio24->u.status1.flags = cpu_to_le16(temp);
3650 	temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3651 	ctio24->u.status1.ox_id = cpu_to_le16(temp);
3652 
3653 	/* Memory Barrier */
3654 	wmb();
3655 	if (qpair->reqq_start_iocbs)
3656 		qpair->reqq_start_iocbs(qpair);
3657 	else
3658 		qla2x00_start_iocbs(vha, qpair->req);
3659 	return ret;
3660 }
3661 
3662 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3663 	struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3664 	int ul_abort)
3665 {
3666 	struct scsi_qla_host *vha;
3667 	unsigned long flags = 0;
3668 	int rc;
3669 
3670 	/* why use different vha? NPIV */
3671 	if (cmd)
3672 		vha = cmd->vha;
3673 	else
3674 		vha = qpair->vha;
3675 
3676 	if (ha_locked) {
3677 		rc = __qlt_send_term_exchange(qpair, cmd, atio);
3678 		if (rc == -ENOMEM)
3679 			qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3680 		goto done;
3681 	}
3682 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3683 	rc = __qlt_send_term_exchange(qpair, cmd, atio);
3684 	if (rc == -ENOMEM)
3685 		qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3686 
3687 done:
3688 	if (cmd && !ul_abort && !cmd->aborted) {
3689 		if (cmd->sg_mapped)
3690 			qlt_unmap_sg(vha, cmd);
3691 		vha->hw->tgt.tgt_ops->free_cmd(cmd);
3692 	}
3693 
3694 	if (!ha_locked)
3695 		spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3696 
3697 	return;
3698 }
3699 
3700 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3701 {
3702 	struct list_head free_list;
3703 	struct qla_tgt_cmd *cmd, *tcmd;
3704 
3705 	vha->hw->tgt.leak_exchg_thresh_hold =
3706 	    (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3707 
3708 	cmd = tcmd = NULL;
3709 	if (!list_empty(&vha->hw->tgt.q_full_list)) {
3710 		INIT_LIST_HEAD(&free_list);
3711 		list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3712 
3713 		list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3714 			list_del(&cmd->cmd_list);
3715 			/* This cmd was never sent to TCM.  There is no need
3716 			 * to schedule free or call free_cmd
3717 			 */
3718 			qlt_free_cmd(cmd);
3719 			vha->hw->tgt.num_qfull_cmds_alloc--;
3720 		}
3721 	}
3722 	vha->hw->tgt.num_qfull_cmds_dropped = 0;
3723 }
3724 
3725 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3726 {
3727 	uint32_t total_leaked;
3728 
3729 	total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3730 
3731 	if (vha->hw->tgt.leak_exchg_thresh_hold &&
3732 	    (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3733 
3734 		ql_dbg(ql_dbg_tgt, vha, 0xe079,
3735 		    "Chip reset due to exchange starvation: %d/%d.\n",
3736 		    total_leaked, vha->hw->cur_fw_xcb_count);
3737 
3738 		if (IS_P3P_TYPE(vha->hw))
3739 			set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3740 		else
3741 			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3742 		qla2xxx_wake_dpc(vha);
3743 	}
3744 
3745 }
3746 
3747 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3748 {
3749 	struct qla_tgt *tgt = cmd->tgt;
3750 	struct scsi_qla_host *vha = tgt->vha;
3751 	struct se_cmd *se_cmd = &cmd->se_cmd;
3752 	unsigned long flags;
3753 
3754 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3755 	    "qla_target(%d): terminating exchange for aborted cmd=%p "
3756 	    "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3757 	    se_cmd->tag);
3758 
3759 	spin_lock_irqsave(&cmd->cmd_lock, flags);
3760 	if (cmd->aborted) {
3761 		spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3762 		/*
3763 		 * It's normal to see 2 calls in this path:
3764 		 *  1) XFER Rdy completion + CMD_T_ABORT
3765 		 *  2) TCM TMR - drain_state_list
3766 		 */
3767 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3768 		    "multiple abort. %p transport_state %x, t_state %x, "
3769 		    "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3770 		    cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3771 		return EIO;
3772 	}
3773 	cmd->aborted = 1;
3774 	cmd->trc_flags |= TRC_ABORT;
3775 	spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3776 
3777 	qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3778 	return 0;
3779 }
3780 EXPORT_SYMBOL(qlt_abort_cmd);
3781 
3782 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3783 {
3784 	struct fc_port *sess = cmd->sess;
3785 
3786 	ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3787 	    "%s: se_cmd[%p] ox_id %04x\n",
3788 	    __func__, &cmd->se_cmd,
3789 	    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3790 
3791 	BUG_ON(cmd->cmd_in_wq);
3792 
3793 	if (cmd->sg_mapped)
3794 		qlt_unmap_sg(cmd->vha, cmd);
3795 
3796 	if (!cmd->q_full)
3797 		qlt_decr_num_pend_cmds(cmd->vha);
3798 
3799 	BUG_ON(cmd->sg_mapped);
3800 	cmd->jiffies_at_free = get_jiffies_64();
3801 	if (unlikely(cmd->free_sg))
3802 		kfree(cmd->sg);
3803 
3804 	if (!sess || !sess->se_sess) {
3805 		WARN_ON(1);
3806 		return;
3807 	}
3808 	cmd->jiffies_at_free = get_jiffies_64();
3809 	target_free_tag(sess->se_sess, &cmd->se_cmd);
3810 }
3811 EXPORT_SYMBOL(qlt_free_cmd);
3812 
3813 /*
3814  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3815  */
3816 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3817 	struct qla_tgt_cmd *cmd, uint32_t status)
3818 {
3819 	int term = 0;
3820 	struct scsi_qla_host *vha = qpair->vha;
3821 
3822 	if (cmd->se_cmd.prot_op)
3823 		ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3824 		    "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3825 		    "se_cmd=%p tag[%x] op %#x/%s",
3826 		     cmd->lba, cmd->lba,
3827 		     cmd->num_blks, &cmd->se_cmd,
3828 		     cmd->atio.u.isp24.exchange_addr,
3829 		     cmd->se_cmd.prot_op,
3830 		     prot_op_str(cmd->se_cmd.prot_op));
3831 
3832 	if (ctio != NULL) {
3833 		struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3834 
3835 		term = !(c->flags &
3836 		    cpu_to_le16(OF_TERM_EXCH));
3837 	} else
3838 		term = 1;
3839 
3840 	if (term)
3841 		qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3842 
3843 	return term;
3844 }
3845 
3846 
3847 /* ha->hardware_lock supposed to be held on entry */
3848 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3849 	struct rsp_que *rsp, uint32_t handle, void *ctio)
3850 {
3851 	void *cmd = NULL;
3852 	struct req_que *req;
3853 	int qid = GET_QID(handle);
3854 	uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3855 
3856 	if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3857 		return NULL;
3858 
3859 	if (qid == rsp->req->id) {
3860 		req = rsp->req;
3861 	} else if (vha->hw->req_q_map[qid]) {
3862 		ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3863 		    "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3864 		    vha->vp_idx, rsp->id, handle);
3865 		req = vha->hw->req_q_map[qid];
3866 	} else {
3867 		return NULL;
3868 	}
3869 
3870 	h &= QLA_CMD_HANDLE_MASK;
3871 
3872 	if (h != QLA_TGT_NULL_HANDLE) {
3873 		if (unlikely(h >= req->num_outstanding_cmds)) {
3874 			ql_dbg(ql_dbg_tgt, vha, 0xe052,
3875 			    "qla_target(%d): Wrong handle %x received\n",
3876 			    vha->vp_idx, handle);
3877 			return NULL;
3878 		}
3879 
3880 		cmd = (void *) req->outstanding_cmds[h];
3881 		if (unlikely(cmd == NULL)) {
3882 			ql_dbg(ql_dbg_async, vha, 0xe053,
3883 			    "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3884 				vha->vp_idx, handle, req->id, rsp->id);
3885 			return NULL;
3886 		}
3887 		req->outstanding_cmds[h] = NULL;
3888 	} else if (ctio != NULL) {
3889 		/* We can't get loop ID from CTIO7 */
3890 		ql_dbg(ql_dbg_tgt, vha, 0xe054,
3891 		    "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3892 		    "support NULL handles\n", vha->vp_idx);
3893 		return NULL;
3894 	}
3895 
3896 	return cmd;
3897 }
3898 
3899 /*
3900  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3901  */
3902 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3903     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3904 {
3905 	struct qla_hw_data *ha = vha->hw;
3906 	struct se_cmd *se_cmd;
3907 	struct qla_tgt_cmd *cmd;
3908 	struct qla_qpair *qpair = rsp->qpair;
3909 
3910 	if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3911 		/* That could happen only in case of an error/reset/abort */
3912 		if (status != CTIO_SUCCESS) {
3913 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3914 			    "Intermediate CTIO received"
3915 			    " (status %x)\n", status);
3916 		}
3917 		return;
3918 	}
3919 
3920 	cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3921 	if (cmd == NULL)
3922 		return;
3923 
3924 	se_cmd = &cmd->se_cmd;
3925 	cmd->cmd_sent_to_fw = 0;
3926 
3927 	qlt_unmap_sg(vha, cmd);
3928 
3929 	if (unlikely(status != CTIO_SUCCESS)) {
3930 		switch (status & 0xFFFF) {
3931 		case CTIO_INVALID_RX_ID:
3932 			if (printk_ratelimit())
3933 				dev_info(&vha->hw->pdev->dev,
3934 				    "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3935 				    vha->vp_idx, cmd->atio.u.isp24.attr,
3936 				    ((cmd->ctio_flags >> 9) & 0xf),
3937 				    cmd->ctio_flags);
3938 
3939 			break;
3940 		case CTIO_LIP_RESET:
3941 		case CTIO_TARGET_RESET:
3942 		case CTIO_ABORTED:
3943 			/* driver request abort via Terminate exchange */
3944 		case CTIO_TIMEOUT:
3945 			/* They are OK */
3946 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3947 			    "qla_target(%d): CTIO with "
3948 			    "status %#x received, state %x, se_cmd %p, "
3949 			    "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3950 			    "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3951 			    status, cmd->state, se_cmd);
3952 			break;
3953 
3954 		case CTIO_PORT_LOGGED_OUT:
3955 		case CTIO_PORT_UNAVAILABLE:
3956 		{
3957 			int logged_out =
3958 				(status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3959 
3960 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3961 			    "qla_target(%d): CTIO with %s status %x "
3962 			    "received (state %x, se_cmd %p)\n", vha->vp_idx,
3963 			    logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3964 			    status, cmd->state, se_cmd);
3965 
3966 			if (logged_out && cmd->sess) {
3967 				/*
3968 				 * Session is already logged out, but we need
3969 				 * to notify initiator, who's not aware of this
3970 				 */
3971 				cmd->sess->send_els_logo = 1;
3972 				ql_dbg(ql_dbg_disc, vha, 0x20f8,
3973 				    "%s %d %8phC post del sess\n",
3974 				    __func__, __LINE__, cmd->sess->port_name);
3975 
3976 				qlt_schedule_sess_for_deletion(cmd->sess);
3977 			}
3978 			break;
3979 		}
3980 		case CTIO_DIF_ERROR: {
3981 			struct ctio_crc_from_fw *crc =
3982 				(struct ctio_crc_from_fw *)ctio;
3983 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3984 			    "qla_target(%d): CTIO with DIF_ERROR status %x "
3985 			    "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3986 			    "expect_dif[0x%llx]\n",
3987 			    vha->vp_idx, status, cmd->state, se_cmd,
3988 			    *((u64 *)&crc->actual_dif[0]),
3989 			    *((u64 *)&crc->expected_dif[0]));
3990 
3991 			qlt_handle_dif_error(qpair, cmd, ctio);
3992 			return;
3993 		}
3994 		default:
3995 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3996 			    "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3997 			    vha->vp_idx, status, cmd->state, se_cmd);
3998 			break;
3999 		}
4000 
4001 
4002 		/* "cmd->aborted" means
4003 		 * cmd is already aborted/terminated, we don't
4004 		 * need to terminate again.  The exchange is already
4005 		 * cleaned up/freed at FW level.  Just cleanup at driver
4006 		 * level.
4007 		 */
4008 		if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4009 		    (!cmd->aborted)) {
4010 			cmd->trc_flags |= TRC_CTIO_ERR;
4011 			if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4012 				return;
4013 		}
4014 	}
4015 
4016 	if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4017 		cmd->trc_flags |= TRC_CTIO_DONE;
4018 	} else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4019 		cmd->state = QLA_TGT_STATE_DATA_IN;
4020 
4021 		if (status == CTIO_SUCCESS)
4022 			cmd->write_data_transferred = 1;
4023 
4024 		ha->tgt.tgt_ops->handle_data(cmd);
4025 		return;
4026 	} else if (cmd->aborted) {
4027 		cmd->trc_flags |= TRC_CTIO_ABORTED;
4028 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4029 		  "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4030 	} else {
4031 		cmd->trc_flags |= TRC_CTIO_STRANGE;
4032 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4033 		    "qla_target(%d): A command in state (%d) should "
4034 		    "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4035 	}
4036 
4037 	if (unlikely(status != CTIO_SUCCESS) &&
4038 		!cmd->aborted) {
4039 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4040 		dump_stack();
4041 	}
4042 
4043 	ha->tgt.tgt_ops->free_cmd(cmd);
4044 }
4045 
4046 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4047 	uint8_t task_codes)
4048 {
4049 	int fcp_task_attr;
4050 
4051 	switch (task_codes) {
4052 	case ATIO_SIMPLE_QUEUE:
4053 		fcp_task_attr = TCM_SIMPLE_TAG;
4054 		break;
4055 	case ATIO_HEAD_OF_QUEUE:
4056 		fcp_task_attr = TCM_HEAD_TAG;
4057 		break;
4058 	case ATIO_ORDERED_QUEUE:
4059 		fcp_task_attr = TCM_ORDERED_TAG;
4060 		break;
4061 	case ATIO_ACA_QUEUE:
4062 		fcp_task_attr = TCM_ACA_TAG;
4063 		break;
4064 	case ATIO_UNTAGGED:
4065 		fcp_task_attr = TCM_SIMPLE_TAG;
4066 		break;
4067 	default:
4068 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4069 		    "qla_target: unknown task code %x, use ORDERED instead\n",
4070 		    task_codes);
4071 		fcp_task_attr = TCM_ORDERED_TAG;
4072 		break;
4073 	}
4074 
4075 	return fcp_task_attr;
4076 }
4077 
4078 /*
4079  * Process context for I/O path into tcm_qla2xxx code
4080  */
4081 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4082 {
4083 	scsi_qla_host_t *vha = cmd->vha;
4084 	struct qla_hw_data *ha = vha->hw;
4085 	struct fc_port *sess = cmd->sess;
4086 	struct atio_from_isp *atio = &cmd->atio;
4087 	unsigned char *cdb;
4088 	unsigned long flags;
4089 	uint32_t data_length;
4090 	int ret, fcp_task_attr, data_dir, bidi = 0;
4091 	struct qla_qpair *qpair = cmd->qpair;
4092 
4093 	cmd->cmd_in_wq = 0;
4094 	cmd->trc_flags |= TRC_DO_WORK;
4095 
4096 	if (cmd->aborted) {
4097 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4098 		    "cmd with tag %u is aborted\n",
4099 		    cmd->atio.u.isp24.exchange_addr);
4100 		goto out_term;
4101 	}
4102 
4103 	spin_lock_init(&cmd->cmd_lock);
4104 	cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4105 	cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4106 
4107 	if (atio->u.isp24.fcp_cmnd.rddata &&
4108 	    atio->u.isp24.fcp_cmnd.wrdata) {
4109 		bidi = 1;
4110 		data_dir = DMA_TO_DEVICE;
4111 	} else if (atio->u.isp24.fcp_cmnd.rddata)
4112 		data_dir = DMA_FROM_DEVICE;
4113 	else if (atio->u.isp24.fcp_cmnd.wrdata)
4114 		data_dir = DMA_TO_DEVICE;
4115 	else
4116 		data_dir = DMA_NONE;
4117 
4118 	fcp_task_attr = qlt_get_fcp_task_attr(vha,
4119 	    atio->u.isp24.fcp_cmnd.task_attr);
4120 	data_length = get_datalen_for_atio(atio);
4121 
4122 	ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4123 				          fcp_task_attr, data_dir, bidi);
4124 	if (ret != 0)
4125 		goto out_term;
4126 	/*
4127 	 * Drop extra session reference from qlt_handle_cmd_for_atio().
4128 	 */
4129 	ha->tgt.tgt_ops->put_sess(sess);
4130 	return;
4131 
4132 out_term:
4133 	ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4134 	/*
4135 	 * cmd has not sent to target yet, so pass NULL as the second
4136 	 * argument to qlt_send_term_exchange() and free the memory here.
4137 	 */
4138 	cmd->trc_flags |= TRC_DO_WORK_ERR;
4139 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4140 	qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4141 
4142 	qlt_decr_num_pend_cmds(vha);
4143 	target_free_tag(sess->se_sess, &cmd->se_cmd);
4144 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4145 
4146 	ha->tgt.tgt_ops->put_sess(sess);
4147 }
4148 
4149 static void qlt_do_work(struct work_struct *work)
4150 {
4151 	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4152 	scsi_qla_host_t *vha = cmd->vha;
4153 	unsigned long flags;
4154 
4155 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4156 	list_del(&cmd->cmd_list);
4157 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4158 
4159 	__qlt_do_work(cmd);
4160 }
4161 
4162 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4163 {
4164 	unsigned long flags;
4165 	struct qla_hw_data *ha = vha->hw;
4166 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4167 	void *node;
4168 	u64 key = 0;
4169 
4170 	ql_log(ql_log_info, vha, 0x706c,
4171 	    "User update Number of Active Qpairs %d\n",
4172 	    ha->tgt.num_act_qpairs);
4173 
4174 	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4175 
4176 	btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4177 		btree_remove64(&tgt->lun_qpair_map, key);
4178 
4179 	ha->base_qpair->lun_cnt = 0;
4180 	for (key = 0; key < ha->max_qpairs; key++)
4181 		if (ha->queue_pair_map[key])
4182 			ha->queue_pair_map[key]->lun_cnt = 0;
4183 
4184 	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4185 }
4186 
4187 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4188 	struct qla_tgt_cmd *cmd)
4189 {
4190 	struct qla_qpair *qpair, *qp;
4191 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4192 	struct qla_qpair_hint *h;
4193 
4194 	if (vha->flags.qpairs_available) {
4195 		h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4196 		if (unlikely(!h)) {
4197 			/* spread lun to qpair ratio evently */
4198 			int lcnt = 0, rc;
4199 			struct scsi_qla_host *base_vha =
4200 				pci_get_drvdata(vha->hw->pdev);
4201 
4202 			qpair = vha->hw->base_qpair;
4203 			if (qpair->lun_cnt == 0) {
4204 				qpair->lun_cnt++;
4205 				h = qla_qpair_to_hint(tgt, qpair);
4206 				BUG_ON(!h);
4207 				rc = btree_insert64(&tgt->lun_qpair_map,
4208 					cmd->unpacked_lun, h, GFP_ATOMIC);
4209 				if (rc) {
4210 					qpair->lun_cnt--;
4211 					ql_log(ql_log_info, vha, 0xd037,
4212 					    "Unable to insert lun %llx into lun_qpair_map\n",
4213 					    cmd->unpacked_lun);
4214 				}
4215 				goto out;
4216 			} else {
4217 				lcnt = qpair->lun_cnt;
4218 			}
4219 
4220 			h = NULL;
4221 			list_for_each_entry(qp, &base_vha->qp_list,
4222 			    qp_list_elem) {
4223 				if (qp->lun_cnt == 0) {
4224 					qp->lun_cnt++;
4225 					h = qla_qpair_to_hint(tgt, qp);
4226 					BUG_ON(!h);
4227 					rc = btree_insert64(&tgt->lun_qpair_map,
4228 					    cmd->unpacked_lun, h, GFP_ATOMIC);
4229 					if (rc) {
4230 						qp->lun_cnt--;
4231 						ql_log(ql_log_info, vha, 0xd038,
4232 							"Unable to insert lun %llx into lun_qpair_map\n",
4233 							cmd->unpacked_lun);
4234 					}
4235 					qpair = qp;
4236 					goto out;
4237 				} else {
4238 					if (qp->lun_cnt < lcnt) {
4239 						lcnt = qp->lun_cnt;
4240 						qpair = qp;
4241 						continue;
4242 					}
4243 				}
4244 			}
4245 			BUG_ON(!qpair);
4246 			qpair->lun_cnt++;
4247 			h = qla_qpair_to_hint(tgt, qpair);
4248 			BUG_ON(!h);
4249 			rc = btree_insert64(&tgt->lun_qpair_map,
4250 				cmd->unpacked_lun, h, GFP_ATOMIC);
4251 			if (rc) {
4252 				qpair->lun_cnt--;
4253 				ql_log(ql_log_info, vha, 0xd039,
4254 				   "Unable to insert lun %llx into lun_qpair_map\n",
4255 				   cmd->unpacked_lun);
4256 			}
4257 		}
4258 	} else {
4259 		h = &tgt->qphints[0];
4260 	}
4261 out:
4262 	cmd->qpair = h->qpair;
4263 	cmd->se_cmd.cpuid = h->cpuid;
4264 }
4265 
4266 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4267 				       struct fc_port *sess,
4268 				       struct atio_from_isp *atio)
4269 {
4270 	struct se_session *se_sess = sess->se_sess;
4271 	struct qla_tgt_cmd *cmd;
4272 	int tag, cpu;
4273 
4274 	tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
4275 	if (tag < 0)
4276 		return NULL;
4277 
4278 	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4279 	memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4280 	cmd->cmd_type = TYPE_TGT_CMD;
4281 	memcpy(&cmd->atio, atio, sizeof(*atio));
4282 	cmd->state = QLA_TGT_STATE_NEW;
4283 	cmd->tgt = vha->vha_tgt.qla_tgt;
4284 	qlt_incr_num_pend_cmds(vha);
4285 	cmd->vha = vha;
4286 	cmd->se_cmd.map_tag = tag;
4287 	cmd->se_cmd.map_cpu = cpu;
4288 	cmd->sess = sess;
4289 	cmd->loop_id = sess->loop_id;
4290 	cmd->conf_compl_supported = sess->conf_compl_supported;
4291 
4292 	cmd->trc_flags = 0;
4293 	cmd->jiffies_at_alloc = get_jiffies_64();
4294 
4295 	cmd->unpacked_lun = scsilun_to_int(
4296 	    (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4297 	qlt_assign_qpair(vha, cmd);
4298 	cmd->reset_count = vha->hw->base_qpair->chip_reset;
4299 	cmd->vp_idx = vha->vp_idx;
4300 
4301 	return cmd;
4302 }
4303 
4304 /* ha->hardware_lock supposed to be held on entry */
4305 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4306 	struct atio_from_isp *atio)
4307 {
4308 	struct qla_hw_data *ha = vha->hw;
4309 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4310 	struct fc_port *sess;
4311 	struct qla_tgt_cmd *cmd;
4312 	unsigned long flags;
4313 	port_id_t id;
4314 
4315 	if (unlikely(tgt->tgt_stop)) {
4316 		ql_dbg(ql_dbg_io, vha, 0x3061,
4317 		    "New command while device %p is shutting down\n", tgt);
4318 		return -ENODEV;
4319 	}
4320 
4321 	id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4322 	if (IS_SW_RESV_ADDR(id))
4323 		return -EBUSY;
4324 
4325 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4326 	if (unlikely(!sess))
4327 		return -EFAULT;
4328 
4329 	/* Another WWN used to have our s_id. Our PLOGI scheduled its
4330 	 * session deletion, but it's still in sess_del_work wq */
4331 	if (sess->deleted) {
4332 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4333 		    "New command while old session %p is being deleted\n",
4334 		    sess);
4335 		return -EFAULT;
4336 	}
4337 
4338 	/*
4339 	 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4340 	 */
4341 	if (!kref_get_unless_zero(&sess->sess_kref)) {
4342 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4343 		    "%s: kref_get fail, %8phC oxid %x \n",
4344 		    __func__, sess->port_name,
4345 		     be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4346 		return -EFAULT;
4347 	}
4348 
4349 	cmd = qlt_get_tag(vha, sess, atio);
4350 	if (!cmd) {
4351 		ql_dbg(ql_dbg_io, vha, 0x3062,
4352 		    "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4353 		ha->tgt.tgt_ops->put_sess(sess);
4354 		return -EBUSY;
4355 	}
4356 
4357 	cmd->cmd_in_wq = 1;
4358 	cmd->trc_flags |= TRC_NEW_CMD;
4359 
4360 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4361 	list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4362 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4363 
4364 	INIT_WORK(&cmd->work, qlt_do_work);
4365 	if (vha->flags.qpairs_available) {
4366 		queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4367 	} else if (ha->msix_count) {
4368 		if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4369 			queue_work_on(smp_processor_id(), qla_tgt_wq,
4370 			    &cmd->work);
4371 		else
4372 			queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4373 			    &cmd->work);
4374 	} else {
4375 		queue_work(qla_tgt_wq, &cmd->work);
4376 	}
4377 
4378 	return 0;
4379 }
4380 
4381 /* ha->hardware_lock supposed to be held on entry */
4382 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4383 	int fn, void *iocb, int flags)
4384 {
4385 	struct scsi_qla_host *vha = sess->vha;
4386 	struct qla_hw_data *ha = vha->hw;
4387 	struct qla_tgt_mgmt_cmd *mcmd;
4388 	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4389 	struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4390 
4391 	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4392 	if (!mcmd) {
4393 		ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4394 		    "qla_target(%d): Allocation of management "
4395 		    "command failed, some commands and their data could "
4396 		    "leak\n", vha->vp_idx);
4397 		return -ENOMEM;
4398 	}
4399 	memset(mcmd, 0, sizeof(*mcmd));
4400 	mcmd->sess = sess;
4401 
4402 	if (iocb) {
4403 		memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4404 		    sizeof(mcmd->orig_iocb.imm_ntfy));
4405 	}
4406 	mcmd->tmr_func = fn;
4407 	mcmd->flags = flags;
4408 	mcmd->reset_count = ha->base_qpair->chip_reset;
4409 	mcmd->qpair = h->qpair;
4410 	mcmd->vha = vha;
4411 	mcmd->se_cmd.cpuid = h->cpuid;
4412 	mcmd->unpacked_lun = lun;
4413 
4414 	switch (fn) {
4415 	case QLA_TGT_LUN_RESET:
4416 	case QLA_TGT_CLEAR_TS:
4417 	case QLA_TGT_ABORT_TS:
4418 		abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4419 		/* fall through */
4420 	case QLA_TGT_CLEAR_ACA:
4421 		h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4422 		mcmd->qpair = h->qpair;
4423 		mcmd->se_cmd.cpuid = h->cpuid;
4424 		break;
4425 
4426 	case QLA_TGT_TARGET_RESET:
4427 	case QLA_TGT_NEXUS_LOSS_SESS:
4428 	case QLA_TGT_NEXUS_LOSS:
4429 	case QLA_TGT_ABORT_ALL:
4430 	default:
4431 		/* no-op */
4432 		break;
4433 	}
4434 
4435 	INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4436 	queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4437 	    &mcmd->work);
4438 
4439 	return 0;
4440 }
4441 
4442 /* ha->hardware_lock supposed to be held on entry */
4443 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4444 {
4445 	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4446 	struct qla_hw_data *ha = vha->hw;
4447 	struct fc_port *sess;
4448 	u64 unpacked_lun;
4449 	int fn;
4450 	unsigned long flags;
4451 
4452 	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4453 
4454 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4455 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4456 	    a->u.isp24.fcp_hdr.s_id);
4457 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4458 
4459 	unpacked_lun =
4460 	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4461 
4462 	if (sess == NULL || sess->deleted)
4463 		return -EFAULT;
4464 
4465 	return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4466 }
4467 
4468 /* ha->hardware_lock supposed to be held on entry */
4469 static int __qlt_abort_task(struct scsi_qla_host *vha,
4470 	struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4471 {
4472 	struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4473 	struct qla_hw_data *ha = vha->hw;
4474 	struct qla_tgt_mgmt_cmd *mcmd;
4475 	u64 unpacked_lun;
4476 	int rc;
4477 
4478 	mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4479 	if (mcmd == NULL) {
4480 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4481 		    "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4482 		    vha->vp_idx, __func__);
4483 		return -ENOMEM;
4484 	}
4485 	memset(mcmd, 0, sizeof(*mcmd));
4486 
4487 	mcmd->sess = sess;
4488 	memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4489 	    sizeof(mcmd->orig_iocb.imm_ntfy));
4490 
4491 	unpacked_lun =
4492 	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4493 	mcmd->reset_count = ha->base_qpair->chip_reset;
4494 	mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4495 	mcmd->qpair = ha->base_qpair;
4496 
4497 	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4498 	    le16_to_cpu(iocb->u.isp2x.seq_id));
4499 	if (rc != 0) {
4500 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4501 		    "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4502 		    vha->vp_idx, rc);
4503 		mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4504 		return -EFAULT;
4505 	}
4506 
4507 	return 0;
4508 }
4509 
4510 /* ha->hardware_lock supposed to be held on entry */
4511 static int qlt_abort_task(struct scsi_qla_host *vha,
4512 	struct imm_ntfy_from_isp *iocb)
4513 {
4514 	struct qla_hw_data *ha = vha->hw;
4515 	struct fc_port *sess;
4516 	int loop_id;
4517 	unsigned long flags;
4518 
4519 	loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4520 
4521 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4522 	sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4523 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4524 
4525 	if (sess == NULL) {
4526 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4527 		    "qla_target(%d): task abort for unexisting "
4528 		    "session\n", vha->vp_idx);
4529 		return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4530 		    QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4531 	}
4532 
4533 	return __qlt_abort_task(vha, iocb, sess);
4534 }
4535 
4536 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4537 {
4538 	if (rc != MBS_COMMAND_COMPLETE) {
4539 		ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4540 			"%s: se_sess %p / sess %p from"
4541 			" port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4542 			" LOGO failed: %#x\n",
4543 			__func__,
4544 			fcport->se_sess,
4545 			fcport,
4546 			fcport->port_name, fcport->loop_id,
4547 			fcport->d_id.b.domain, fcport->d_id.b.area,
4548 			fcport->d_id.b.al_pa, rc);
4549 	}
4550 
4551 	fcport->logout_completed = 1;
4552 }
4553 
4554 /*
4555 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4556 *
4557 * Schedules sessions with matching port_id/loop_id but different wwn for
4558 * deletion. Returns existing session with matching wwn if present.
4559 * Null otherwise.
4560 */
4561 struct fc_port *
4562 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4563     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4564 {
4565 	struct fc_port *sess = NULL, *other_sess;
4566 	uint64_t other_wwn;
4567 
4568 	*conflict_sess = NULL;
4569 
4570 	list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4571 
4572 		other_wwn = wwn_to_u64(other_sess->port_name);
4573 
4574 		if (wwn == other_wwn) {
4575 			WARN_ON(sess);
4576 			sess = other_sess;
4577 			continue;
4578 		}
4579 
4580 		/* find other sess with nport_id collision */
4581 		if (port_id.b24 == other_sess->d_id.b24) {
4582 			if (loop_id != other_sess->loop_id) {
4583 				ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4584 				    "Invalidating sess %p loop_id %d wwn %llx.\n",
4585 				    other_sess, other_sess->loop_id, other_wwn);
4586 
4587 				/*
4588 				 * logout_on_delete is set by default, but another
4589 				 * session that has the same s_id/loop_id combo
4590 				 * might have cleared it when requested this session
4591 				 * deletion, so don't touch it
4592 				 */
4593 				qlt_schedule_sess_for_deletion(other_sess);
4594 			} else {
4595 				/*
4596 				 * Another wwn used to have our s_id/loop_id
4597 				 * kill the session, but don't free the loop_id
4598 				 */
4599 				ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4600 				    "Invalidating sess %p loop_id %d wwn %llx.\n",
4601 				    other_sess, other_sess->loop_id, other_wwn);
4602 
4603 				other_sess->keep_nport_handle = 1;
4604 				if (other_sess->disc_state != DSC_DELETED)
4605 					*conflict_sess = other_sess;
4606 				qlt_schedule_sess_for_deletion(other_sess);
4607 			}
4608 			continue;
4609 		}
4610 
4611 		/* find other sess with nport handle collision */
4612 		if ((loop_id == other_sess->loop_id) &&
4613 			(loop_id != FC_NO_LOOP_ID)) {
4614 			ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4615 			       "Invalidating sess %p loop_id %d wwn %llx.\n",
4616 			       other_sess, other_sess->loop_id, other_wwn);
4617 
4618 			/* Same loop_id but different s_id
4619 			 * Ok to kill and logout */
4620 			qlt_schedule_sess_for_deletion(other_sess);
4621 		}
4622 	}
4623 
4624 	return sess;
4625 }
4626 
4627 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4628 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4629 {
4630 	struct qla_tgt_sess_op *op;
4631 	struct qla_tgt_cmd *cmd;
4632 	uint32_t key;
4633 	int count = 0;
4634 	unsigned long flags;
4635 
4636 	key = (((u32)s_id->b.domain << 16) |
4637 	       ((u32)s_id->b.area   <<  8) |
4638 	       ((u32)s_id->b.al_pa));
4639 
4640 	spin_lock_irqsave(&vha->cmd_list_lock, flags);
4641 	list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4642 		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4643 
4644 		if (op_key == key) {
4645 			op->aborted = true;
4646 			count++;
4647 		}
4648 	}
4649 
4650 	list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4651 		uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4652 
4653 		if (op_key == key) {
4654 			op->aborted = true;
4655 			count++;
4656 		}
4657 	}
4658 
4659 	list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4660 		uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4661 
4662 		if (cmd_key == key) {
4663 			cmd->aborted = 1;
4664 			count++;
4665 		}
4666 	}
4667 	spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4668 
4669 	return count;
4670 }
4671 
4672 static int qlt_handle_login(struct scsi_qla_host *vha,
4673     struct imm_ntfy_from_isp *iocb)
4674 {
4675 	struct fc_port *sess = NULL, *conflict_sess = NULL;
4676 	uint64_t wwn;
4677 	port_id_t port_id;
4678 	uint16_t loop_id, wd3_lo;
4679 	int res = 0;
4680 	struct qlt_plogi_ack_t *pla;
4681 	unsigned long flags;
4682 
4683 	lockdep_assert_held(&vha->hw->hardware_lock);
4684 
4685 	wwn = wwn_to_u64(iocb->u.isp24.port_name);
4686 
4687 	port_id.b.domain = iocb->u.isp24.port_id[2];
4688 	port_id.b.area   = iocb->u.isp24.port_id[1];
4689 	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4690 	port_id.b.rsvd_1 = 0;
4691 
4692 	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4693 
4694 	/* Mark all stale commands sitting in qla_tgt_wq for deletion */
4695 	abort_cmds_for_s_id(vha, &port_id);
4696 
4697 	if (wwn) {
4698 		spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4699 		sess = qlt_find_sess_invalidate_other(vha, wwn,
4700 		    port_id, loop_id, &conflict_sess);
4701 		spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4702 	} else {
4703 		ql_dbg(ql_dbg_disc, vha, 0xffff,
4704 		    "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4705 		    __func__, __LINE__, loop_id, port_id.b24);
4706 		qlt_send_term_imm_notif(vha, iocb, 1);
4707 		goto out;
4708 	}
4709 
4710 	if (IS_SW_RESV_ADDR(port_id)) {
4711 		res = 1;
4712 		goto out;
4713 	}
4714 
4715 	pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4716 	if (!pla) {
4717 		ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4718 		    "%s %d %8phC Term INOT due to mem alloc fail",
4719 		    __func__, __LINE__,
4720 		    iocb->u.isp24.port_name);
4721 		qlt_send_term_imm_notif(vha, iocb, 1);
4722 		goto out;
4723 	}
4724 
4725 	if (conflict_sess) {
4726 		conflict_sess->login_gen++;
4727 		qlt_plogi_ack_link(vha, pla, conflict_sess,
4728 		    QLT_PLOGI_LINK_CONFLICT);
4729 	}
4730 
4731 	if (!sess) {
4732 		pla->ref_count++;
4733 		ql_dbg(ql_dbg_disc, vha, 0xffff,
4734 		    "%s %d %8phC post new sess\n",
4735 		    __func__, __LINE__, iocb->u.isp24.port_name);
4736 		if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4737 			qla24xx_post_newsess_work(vha, &port_id,
4738 			    iocb->u.isp24.port_name,
4739 			    iocb->u.isp24.u.plogi.node_name,
4740 			    pla, FC4_TYPE_UNKNOWN);
4741 		else
4742 			qla24xx_post_newsess_work(vha, &port_id,
4743 			    iocb->u.isp24.port_name, NULL,
4744 			    pla, FC4_TYPE_UNKNOWN);
4745 
4746 		goto out;
4747 	}
4748 
4749 	if (sess->disc_state == DSC_UPD_FCPORT) {
4750 		u16 sec;
4751 
4752 		/*
4753 		 * Remote port registration is still going on from
4754 		 * previous login. Allow it to finish before we
4755 		 * accept the new login.
4756 		 */
4757 		sess->next_disc_state = DSC_DELETE_PEND;
4758 		sec = jiffies_to_msecs(jiffies -
4759 		    sess->jiffies_at_registration) / 1000;
4760 		if (sess->sec_since_registration < sec && sec &&
4761 		    !(sec % 5)) {
4762 			sess->sec_since_registration = sec;
4763 			ql_dbg(ql_dbg_disc, vha, 0xffff,
4764 			    "%s %8phC - Slow Rport registration (%d Sec)\n",
4765 			    __func__, sess->port_name, sec);
4766 		}
4767 
4768 		if (!conflict_sess) {
4769 			list_del(&pla->list);
4770 			kmem_cache_free(qla_tgt_plogi_cachep, pla);
4771 		}
4772 
4773 		qlt_send_term_imm_notif(vha, iocb, 1);
4774 		goto out;
4775 	}
4776 
4777 	qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4778 	sess->d_id = port_id;
4779 	sess->login_gen++;
4780 
4781 	if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4782 		sess->fw_login_state = DSC_LS_PRLI_PEND;
4783 		sess->local = 0;
4784 		sess->loop_id = loop_id;
4785 		sess->d_id = port_id;
4786 		sess->fw_login_state = DSC_LS_PRLI_PEND;
4787 		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4788 
4789 		if (wd3_lo & BIT_7)
4790 			sess->conf_compl_supported = 1;
4791 
4792 		if ((wd3_lo & BIT_4) == 0)
4793 			sess->port_type = FCT_INITIATOR;
4794 		else
4795 			sess->port_type = FCT_TARGET;
4796 
4797 	} else
4798 		sess->fw_login_state = DSC_LS_PLOGI_PEND;
4799 
4800 
4801 	ql_dbg(ql_dbg_disc, vha, 0x20f9,
4802 	    "%s %d %8phC  DS %d\n",
4803 	    __func__, __LINE__, sess->port_name, sess->disc_state);
4804 
4805 	switch (sess->disc_state) {
4806 	case DSC_DELETED:
4807 		qlt_plogi_ack_unref(vha, pla);
4808 		break;
4809 
4810 	default:
4811 		/*
4812 		 * Under normal circumstances we want to release nport handle
4813 		 * during LOGO process to avoid nport handle leaks inside FW.
4814 		 * The exception is when LOGO is done while another PLOGI with
4815 		 * the same nport handle is waiting as might be the case here.
4816 		 * Note: there is always a possibily of a race where session
4817 		 * deletion has already started for other reasons (e.g. ACL
4818 		 * removal) and now PLOGI arrives:
4819 		 * 1. if PLOGI arrived in FW after nport handle has been freed,
4820 		 *    FW must have assigned this PLOGI a new/same handle and we
4821 		 *    can proceed ACK'ing it as usual when session deletion
4822 		 *    completes.
4823 		 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4824 		 *    bit reached it, the handle has now been released. We'll
4825 		 *    get an error when we ACK this PLOGI. Nothing will be sent
4826 		 *    back to initiator. Initiator should eventually retry
4827 		 *    PLOGI and situation will correct itself.
4828 		 */
4829 		sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4830 		    (sess->d_id.b24 == port_id.b24));
4831 
4832 		ql_dbg(ql_dbg_disc, vha, 0x20f9,
4833 		    "%s %d %8phC post del sess\n",
4834 		    __func__, __LINE__, sess->port_name);
4835 
4836 
4837 		qlt_schedule_sess_for_deletion(sess);
4838 		break;
4839 	}
4840 out:
4841 	return res;
4842 }
4843 
4844 /*
4845  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4846  */
4847 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4848 	struct imm_ntfy_from_isp *iocb)
4849 {
4850 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4851 	struct qla_hw_data *ha = vha->hw;
4852 	struct fc_port *sess = NULL, *conflict_sess = NULL;
4853 	uint64_t wwn;
4854 	port_id_t port_id;
4855 	uint16_t loop_id;
4856 	uint16_t wd3_lo;
4857 	int res = 0;
4858 	unsigned long flags;
4859 
4860 	lockdep_assert_held(&ha->hardware_lock);
4861 
4862 	wwn = wwn_to_u64(iocb->u.isp24.port_name);
4863 
4864 	port_id.b.domain = iocb->u.isp24.port_id[2];
4865 	port_id.b.area   = iocb->u.isp24.port_id[1];
4866 	port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4867 	port_id.b.rsvd_1 = 0;
4868 
4869 	loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4870 
4871 	ql_dbg(ql_dbg_disc, vha, 0xf026,
4872 	    "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4873 	    vha->vp_idx, iocb->u.isp24.port_id[2],
4874 		iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4875 		   iocb->u.isp24.status_subcode, loop_id,
4876 		iocb->u.isp24.port_name);
4877 
4878 	/* res = 1 means ack at the end of thread
4879 	 * res = 0 means ack async/later.
4880 	 */
4881 	switch (iocb->u.isp24.status_subcode) {
4882 	case ELS_PLOGI:
4883 		res = qlt_handle_login(vha, iocb);
4884 		break;
4885 
4886 	case ELS_PRLI:
4887 		if (N2N_TOPO(ha)) {
4888 			sess = qla2x00_find_fcport_by_wwpn(vha,
4889 			    iocb->u.isp24.port_name, 1);
4890 
4891 			if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4892 				ql_dbg(ql_dbg_disc, vha, 0xffff,
4893 				    "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4894 				    __func__, __LINE__,
4895 				    iocb->u.isp24.port_name);
4896 				qlt_send_term_imm_notif(vha, iocb, 1);
4897 				break;
4898 			}
4899 
4900 			res = qlt_handle_login(vha, iocb);
4901 			break;
4902 		}
4903 
4904 		if (IS_SW_RESV_ADDR(port_id)) {
4905 			res = 1;
4906 			break;
4907 		}
4908 
4909 		wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4910 
4911 		if (wwn) {
4912 			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4913 			sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4914 				loop_id, &conflict_sess);
4915 			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4916 		}
4917 
4918 		if (conflict_sess) {
4919 			switch (conflict_sess->disc_state) {
4920 			case DSC_DELETED:
4921 			case DSC_DELETE_PEND:
4922 				break;
4923 			default:
4924 				ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4925 				    "PRLI with conflicting sess %p port %8phC\n",
4926 				    conflict_sess, conflict_sess->port_name);
4927 				conflict_sess->fw_login_state =
4928 				    DSC_LS_PORT_UNAVAIL;
4929 				qlt_send_term_imm_notif(vha, iocb, 1);
4930 				res = 0;
4931 				break;
4932 			}
4933 		}
4934 
4935 		if (sess != NULL) {
4936 			bool delete = false;
4937 			int sec;
4938 
4939 			spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4940 			switch (sess->fw_login_state) {
4941 			case DSC_LS_PLOGI_PEND:
4942 			case DSC_LS_PLOGI_COMP:
4943 			case DSC_LS_PRLI_COMP:
4944 				break;
4945 			default:
4946 				delete = true;
4947 				break;
4948 			}
4949 
4950 			switch (sess->disc_state) {
4951 			case DSC_UPD_FCPORT:
4952 				spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4953 				    flags);
4954 
4955 				sec = jiffies_to_msecs(jiffies -
4956 				    sess->jiffies_at_registration)/1000;
4957 				if (sess->sec_since_registration < sec && sec &&
4958 				    !(sec % 5)) {
4959 					sess->sec_since_registration = sec;
4960 					ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4961 					    "%s %8phC : Slow Rport registration(%d Sec)\n",
4962 					    __func__, sess->port_name, sec);
4963 				}
4964 				qlt_send_term_imm_notif(vha, iocb, 1);
4965 				return 0;
4966 
4967 			case DSC_LOGIN_PEND:
4968 			case DSC_GPDB:
4969 			case DSC_LOGIN_COMPLETE:
4970 			case DSC_ADISC:
4971 				delete = false;
4972 				break;
4973 			default:
4974 				break;
4975 			}
4976 
4977 			if (delete) {
4978 				spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4979 				    flags);
4980 				/*
4981 				 * Impatient initiator sent PRLI before last
4982 				 * PLOGI could finish. Will force him to re-try,
4983 				 * while last one finishes.
4984 				 */
4985 				ql_log(ql_log_warn, sess->vha, 0xf095,
4986 				    "sess %p PRLI received, before plogi ack.\n",
4987 				    sess);
4988 				qlt_send_term_imm_notif(vha, iocb, 1);
4989 				res = 0;
4990 				break;
4991 			}
4992 
4993 			/*
4994 			 * This shouldn't happen under normal circumstances,
4995 			 * since we have deleted the old session during PLOGI
4996 			 */
4997 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4998 			    "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4999 			    sess->loop_id, sess, iocb->u.isp24.nport_handle);
5000 
5001 			sess->local = 0;
5002 			sess->loop_id = loop_id;
5003 			sess->d_id = port_id;
5004 			sess->fw_login_state = DSC_LS_PRLI_PEND;
5005 
5006 			if (wd3_lo & BIT_7)
5007 				sess->conf_compl_supported = 1;
5008 
5009 			if ((wd3_lo & BIT_4) == 0)
5010 				sess->port_type = FCT_INITIATOR;
5011 			else
5012 				sess->port_type = FCT_TARGET;
5013 
5014 			spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5015 		}
5016 		res = 1; /* send notify ack */
5017 
5018 		/* Make session global (not used in fabric mode) */
5019 		if (ha->current_topology != ISP_CFG_F) {
5020 			if (sess) {
5021 				ql_dbg(ql_dbg_disc, vha, 0x20fa,
5022 				    "%s %d %8phC post nack\n",
5023 				    __func__, __LINE__, sess->port_name);
5024 				qla24xx_post_nack_work(vha, sess, iocb,
5025 					SRB_NACK_PRLI);
5026 				res = 0;
5027 			} else {
5028 				set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5029 				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5030 				qla2xxx_wake_dpc(vha);
5031 			}
5032 		} else {
5033 			if (sess) {
5034 				ql_dbg(ql_dbg_disc, vha, 0x20fb,
5035 				    "%s %d %8phC post nack\n",
5036 				    __func__, __LINE__, sess->port_name);
5037 				qla24xx_post_nack_work(vha, sess, iocb,
5038 					SRB_NACK_PRLI);
5039 				res = 0;
5040 			}
5041 		}
5042 		break;
5043 
5044 	case ELS_TPRLO:
5045 		if (le16_to_cpu(iocb->u.isp24.flags) &
5046 			NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5047 			loop_id = 0xFFFF;
5048 			qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5049 			res = 1;
5050 			break;
5051 		}
5052 		/* fall through */
5053 	case ELS_LOGO:
5054 	case ELS_PRLO:
5055 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5056 		sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5057 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5058 
5059 		if (sess) {
5060 			sess->login_gen++;
5061 			sess->fw_login_state = DSC_LS_LOGO_PEND;
5062 			sess->logo_ack_needed = 1;
5063 			memcpy(sess->iocb, iocb, IOCB_SIZE);
5064 		}
5065 
5066 		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5067 
5068 		ql_dbg(ql_dbg_disc, vha, 0x20fc,
5069 		    "%s: logo %llx res %d sess %p ",
5070 		    __func__, wwn, res, sess);
5071 		if (res == 0) {
5072 			/*
5073 			 * cmd went upper layer, look for qlt_xmit_tm_rsp()
5074 			 * for LOGO_ACK & sess delete
5075 			 */
5076 			BUG_ON(!sess);
5077 			res = 0;
5078 		} else {
5079 			/* cmd did not go to upper layer. */
5080 			if (sess) {
5081 				qlt_schedule_sess_for_deletion(sess);
5082 				res = 0;
5083 			}
5084 			/* else logo will be ack */
5085 		}
5086 		break;
5087 	case ELS_PDISC:
5088 	case ELS_ADISC:
5089 	{
5090 		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5091 
5092 		if (tgt->link_reinit_iocb_pending) {
5093 			qlt_send_notify_ack(ha->base_qpair,
5094 			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5095 			tgt->link_reinit_iocb_pending = 0;
5096 		}
5097 
5098 		sess = qla2x00_find_fcport_by_wwpn(vha,
5099 		    iocb->u.isp24.port_name, 1);
5100 		if (sess) {
5101 			ql_dbg(ql_dbg_disc, vha, 0x20fd,
5102 				"sess %p lid %d|%d DS %d LS %d\n",
5103 				sess, sess->loop_id, loop_id,
5104 				sess->disc_state, sess->fw_login_state);
5105 		}
5106 
5107 		res = 1; /* send notify ack */
5108 		break;
5109 	}
5110 
5111 	case ELS_FLOGI:	/* should never happen */
5112 	default:
5113 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5114 		    "qla_target(%d): Unsupported ELS command %x "
5115 		    "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5116 		res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5117 		break;
5118 	}
5119 
5120 	ql_dbg(ql_dbg_disc, vha, 0xf026,
5121 	    "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5122 	    vha->vp_idx, iocb->u.isp24.status_subcode, res);
5123 
5124 	return res;
5125 }
5126 
5127 /*
5128  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5129  */
5130 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5131 	struct imm_ntfy_from_isp *iocb)
5132 {
5133 	struct qla_hw_data *ha = vha->hw;
5134 	uint32_t add_flags = 0;
5135 	int send_notify_ack = 1;
5136 	uint16_t status;
5137 
5138 	lockdep_assert_held(&ha->hardware_lock);
5139 
5140 	status = le16_to_cpu(iocb->u.isp2x.status);
5141 	switch (status) {
5142 	case IMM_NTFY_LIP_RESET:
5143 	{
5144 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5145 		    "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5146 		    vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5147 		    iocb->u.isp24.status_subcode);
5148 
5149 		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5150 			send_notify_ack = 0;
5151 		break;
5152 	}
5153 
5154 	case IMM_NTFY_LIP_LINK_REINIT:
5155 	{
5156 		struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5157 
5158 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5159 		    "qla_target(%d): LINK REINIT (loop %#x, "
5160 		    "subcode %x)\n", vha->vp_idx,
5161 		    le16_to_cpu(iocb->u.isp24.nport_handle),
5162 		    iocb->u.isp24.status_subcode);
5163 		if (tgt->link_reinit_iocb_pending) {
5164 			qlt_send_notify_ack(ha->base_qpair,
5165 			    &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5166 		}
5167 		memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5168 		tgt->link_reinit_iocb_pending = 1;
5169 		/*
5170 		 * QLogic requires to wait after LINK REINIT for possible
5171 		 * PDISC or ADISC ELS commands
5172 		 */
5173 		send_notify_ack = 0;
5174 		break;
5175 	}
5176 
5177 	case IMM_NTFY_PORT_LOGOUT:
5178 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5179 		    "qla_target(%d): Port logout (loop "
5180 		    "%#x, subcode %x)\n", vha->vp_idx,
5181 		    le16_to_cpu(iocb->u.isp24.nport_handle),
5182 		    iocb->u.isp24.status_subcode);
5183 
5184 		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5185 			send_notify_ack = 0;
5186 		/* The sessions will be cleared in the callback, if needed */
5187 		break;
5188 
5189 	case IMM_NTFY_GLBL_TPRLO:
5190 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5191 		    "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5192 		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5193 			send_notify_ack = 0;
5194 		/* The sessions will be cleared in the callback, if needed */
5195 		break;
5196 
5197 	case IMM_NTFY_PORT_CONFIG:
5198 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5199 		    "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5200 		    status);
5201 		if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5202 			send_notify_ack = 0;
5203 		/* The sessions will be cleared in the callback, if needed */
5204 		break;
5205 
5206 	case IMM_NTFY_GLBL_LOGO:
5207 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5208 		    "qla_target(%d): Link failure detected\n",
5209 		    vha->vp_idx);
5210 		/* I_T nexus loss */
5211 		if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5212 			send_notify_ack = 0;
5213 		break;
5214 
5215 	case IMM_NTFY_IOCB_OVERFLOW:
5216 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5217 		    "qla_target(%d): Cannot provide requested "
5218 		    "capability (IOCB overflowed the immediate notify "
5219 		    "resource count)\n", vha->vp_idx);
5220 		break;
5221 
5222 	case IMM_NTFY_ABORT_TASK:
5223 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5224 		    "qla_target(%d): Abort Task (S %08x I %#x -> "
5225 		    "L %#x)\n", vha->vp_idx,
5226 		    le16_to_cpu(iocb->u.isp2x.seq_id),
5227 		    GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5228 		    le16_to_cpu(iocb->u.isp2x.lun));
5229 		if (qlt_abort_task(vha, iocb) == 0)
5230 			send_notify_ack = 0;
5231 		break;
5232 
5233 	case IMM_NTFY_RESOURCE:
5234 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5235 		    "qla_target(%d): Out of resources, host %ld\n",
5236 		    vha->vp_idx, vha->host_no);
5237 		break;
5238 
5239 	case IMM_NTFY_MSG_RX:
5240 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5241 		    "qla_target(%d): Immediate notify task %x\n",
5242 		    vha->vp_idx, iocb->u.isp2x.task_flags);
5243 		break;
5244 
5245 	case IMM_NTFY_ELS:
5246 		if (qlt_24xx_handle_els(vha, iocb) == 0)
5247 			send_notify_ack = 0;
5248 		break;
5249 	default:
5250 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5251 		    "qla_target(%d): Received unknown immediate "
5252 		    "notify status %x\n", vha->vp_idx, status);
5253 		break;
5254 	}
5255 
5256 	if (send_notify_ack)
5257 		qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5258 		    0, 0);
5259 }
5260 
5261 /*
5262  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5263  * This function sends busy to ISP 2xxx or 24xx.
5264  */
5265 static int __qlt_send_busy(struct qla_qpair *qpair,
5266 	struct atio_from_isp *atio, uint16_t status)
5267 {
5268 	struct scsi_qla_host *vha = qpair->vha;
5269 	struct ctio7_to_24xx *ctio24;
5270 	struct qla_hw_data *ha = vha->hw;
5271 	request_t *pkt;
5272 	struct fc_port *sess = NULL;
5273 	unsigned long flags;
5274 	u16 temp;
5275 	port_id_t id;
5276 
5277 	id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5278 
5279 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5280 	sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5281 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5282 	if (!sess) {
5283 		qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5284 		return 0;
5285 	}
5286 	/* Sending marker isn't necessary, since we called from ISR */
5287 
5288 	pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5289 	if (!pkt) {
5290 		ql_dbg(ql_dbg_io, vha, 0x3063,
5291 		    "qla_target(%d): %s failed: unable to allocate "
5292 		    "request packet", vha->vp_idx, __func__);
5293 		return -ENOMEM;
5294 	}
5295 
5296 	qpair->tgt_counters.num_q_full_sent++;
5297 	pkt->entry_count = 1;
5298 	pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5299 
5300 	ctio24 = (struct ctio7_to_24xx *)pkt;
5301 	ctio24->entry_type = CTIO_TYPE7;
5302 	ctio24->nport_handle = sess->loop_id;
5303 	ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5304 	ctio24->vp_index = vha->vp_idx;
5305 	ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5306 	ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5307 	temp = (atio->u.isp24.attr << 9) |
5308 		CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5309 		CTIO7_FLAGS_DONT_RET_CTIO;
5310 	ctio24->u.status1.flags = cpu_to_le16(temp);
5311 	/*
5312 	 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5313 	 * if the explicit conformation is used.
5314 	 */
5315 	ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5316 	ctio24->u.status1.scsi_status = cpu_to_le16(status);
5317 
5318 	ctio24->u.status1.residual = get_datalen_for_atio(atio);
5319 
5320 	if (ctio24->u.status1.residual != 0)
5321 		ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5322 
5323 	/* Memory Barrier */
5324 	wmb();
5325 	if (qpair->reqq_start_iocbs)
5326 		qpair->reqq_start_iocbs(qpair);
5327 	else
5328 		qla2x00_start_iocbs(vha, qpair->req);
5329 	return 0;
5330 }
5331 
5332 /*
5333  * This routine is used to allocate a command for either a QFull condition
5334  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5335  * out previously.
5336  */
5337 static void
5338 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5339 	struct atio_from_isp *atio, uint16_t status, int qfull)
5340 {
5341 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5342 	struct qla_hw_data *ha = vha->hw;
5343 	struct fc_port *sess;
5344 	struct se_session *se_sess;
5345 	struct qla_tgt_cmd *cmd;
5346 	int tag, cpu;
5347 	unsigned long flags;
5348 
5349 	if (unlikely(tgt->tgt_stop)) {
5350 		ql_dbg(ql_dbg_io, vha, 0x300a,
5351 			"New command while device %p is shutting down\n", tgt);
5352 		return;
5353 	}
5354 
5355 	if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5356 		vha->hw->tgt.num_qfull_cmds_dropped++;
5357 		if (vha->hw->tgt.num_qfull_cmds_dropped >
5358 			vha->qla_stats.stat_max_qfull_cmds_dropped)
5359 			vha->qla_stats.stat_max_qfull_cmds_dropped =
5360 				vha->hw->tgt.num_qfull_cmds_dropped;
5361 
5362 		ql_dbg(ql_dbg_io, vha, 0x3068,
5363 			"qla_target(%d): %s: QFull CMD dropped[%d]\n",
5364 			vha->vp_idx, __func__,
5365 			vha->hw->tgt.num_qfull_cmds_dropped);
5366 
5367 		qlt_chk_exch_leak_thresh_hold(vha);
5368 		return;
5369 	}
5370 
5371 	sess = ha->tgt.tgt_ops->find_sess_by_s_id
5372 		(vha, atio->u.isp24.fcp_hdr.s_id);
5373 	if (!sess)
5374 		return;
5375 
5376 	se_sess = sess->se_sess;
5377 
5378 	tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
5379 	if (tag < 0) {
5380 		ql_dbg(ql_dbg_io, vha, 0x3009,
5381 			"qla_target(%d): %s: Allocation of cmd failed\n",
5382 			vha->vp_idx, __func__);
5383 
5384 		vha->hw->tgt.num_qfull_cmds_dropped++;
5385 		if (vha->hw->tgt.num_qfull_cmds_dropped >
5386 			vha->qla_stats.stat_max_qfull_cmds_dropped)
5387 			vha->qla_stats.stat_max_qfull_cmds_dropped =
5388 				vha->hw->tgt.num_qfull_cmds_dropped;
5389 
5390 		qlt_chk_exch_leak_thresh_hold(vha);
5391 		return;
5392 	}
5393 
5394 	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5395 	memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5396 
5397 	qlt_incr_num_pend_cmds(vha);
5398 	INIT_LIST_HEAD(&cmd->cmd_list);
5399 	memcpy(&cmd->atio, atio, sizeof(*atio));
5400 
5401 	cmd->tgt = vha->vha_tgt.qla_tgt;
5402 	cmd->vha = vha;
5403 	cmd->reset_count = ha->base_qpair->chip_reset;
5404 	cmd->q_full = 1;
5405 	cmd->qpair = ha->base_qpair;
5406 	cmd->se_cmd.map_cpu = cpu;
5407 
5408 	if (qfull) {
5409 		cmd->q_full = 1;
5410 		/* NOTE: borrowing the state field to carry the status */
5411 		cmd->state = status;
5412 	} else
5413 		cmd->term_exchg = 1;
5414 
5415 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5416 	list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5417 
5418 	vha->hw->tgt.num_qfull_cmds_alloc++;
5419 	if (vha->hw->tgt.num_qfull_cmds_alloc >
5420 		vha->qla_stats.stat_max_qfull_cmds_alloc)
5421 		vha->qla_stats.stat_max_qfull_cmds_alloc =
5422 			vha->hw->tgt.num_qfull_cmds_alloc;
5423 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5424 }
5425 
5426 int
5427 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5428 {
5429 	struct scsi_qla_host *vha = qpair->vha;
5430 	struct qla_hw_data *ha = vha->hw;
5431 	unsigned long flags;
5432 	struct qla_tgt_cmd *cmd, *tcmd;
5433 	struct list_head free_list, q_full_list;
5434 	int rc = 0;
5435 
5436 	if (list_empty(&ha->tgt.q_full_list))
5437 		return 0;
5438 
5439 	INIT_LIST_HEAD(&free_list);
5440 	INIT_LIST_HEAD(&q_full_list);
5441 
5442 	spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5443 	if (list_empty(&ha->tgt.q_full_list)) {
5444 		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5445 		return 0;
5446 	}
5447 
5448 	list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5449 	spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5450 
5451 	spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5452 	list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5453 		if (cmd->q_full)
5454 			/* cmd->state is a borrowed field to hold status */
5455 			rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5456 		else if (cmd->term_exchg)
5457 			rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5458 
5459 		if (rc == -ENOMEM)
5460 			break;
5461 
5462 		if (cmd->q_full)
5463 			ql_dbg(ql_dbg_io, vha, 0x3006,
5464 			    "%s: busy sent for ox_id[%04x]\n", __func__,
5465 			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5466 		else if (cmd->term_exchg)
5467 			ql_dbg(ql_dbg_io, vha, 0x3007,
5468 			    "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5469 			    be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5470 		else
5471 			ql_dbg(ql_dbg_io, vha, 0x3008,
5472 			    "%s: Unexpected cmd in QFull list %p\n", __func__,
5473 			    cmd);
5474 
5475 		list_del(&cmd->cmd_list);
5476 		list_add_tail(&cmd->cmd_list, &free_list);
5477 
5478 		/* piggy back on hardware_lock for protection */
5479 		vha->hw->tgt.num_qfull_cmds_alloc--;
5480 	}
5481 	spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5482 
5483 	cmd = NULL;
5484 
5485 	list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5486 		list_del(&cmd->cmd_list);
5487 		/* This cmd was never sent to TCM.  There is no need
5488 		 * to schedule free or call free_cmd
5489 		 */
5490 		qlt_free_cmd(cmd);
5491 	}
5492 
5493 	if (!list_empty(&q_full_list)) {
5494 		spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5495 		list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5496 		spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5497 	}
5498 
5499 	return rc;
5500 }
5501 
5502 static void
5503 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5504     uint16_t status)
5505 {
5506 	int rc = 0;
5507 	struct scsi_qla_host *vha = qpair->vha;
5508 
5509 	rc = __qlt_send_busy(qpair, atio, status);
5510 	if (rc == -ENOMEM)
5511 		qlt_alloc_qfull_cmd(vha, atio, status, 1);
5512 }
5513 
5514 static int
5515 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5516 	struct atio_from_isp *atio, uint8_t ha_locked)
5517 {
5518 	struct qla_hw_data *ha = vha->hw;
5519 	unsigned long flags;
5520 
5521 	if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5522 		return 0;
5523 
5524 	if (!ha_locked)
5525 		spin_lock_irqsave(&ha->hardware_lock, flags);
5526 	qlt_send_busy(qpair, atio, qla_sam_status);
5527 	if (!ha_locked)
5528 		spin_unlock_irqrestore(&ha->hardware_lock, flags);
5529 
5530 	return 1;
5531 }
5532 
5533 /* ha->hardware_lock supposed to be held on entry */
5534 /* called via callback from qla2xxx */
5535 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5536 	struct atio_from_isp *atio, uint8_t ha_locked)
5537 {
5538 	struct qla_hw_data *ha = vha->hw;
5539 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5540 	int rc;
5541 	unsigned long flags = 0;
5542 
5543 	if (unlikely(tgt == NULL)) {
5544 		ql_dbg(ql_dbg_tgt, vha, 0x3064,
5545 		    "ATIO pkt, but no tgt (ha %p)", ha);
5546 		return;
5547 	}
5548 	/*
5549 	 * In tgt_stop mode we also should allow all requests to pass.
5550 	 * Otherwise, some commands can stuck.
5551 	 */
5552 
5553 	tgt->atio_irq_cmd_count++;
5554 
5555 	switch (atio->u.raw.entry_type) {
5556 	case ATIO_TYPE7:
5557 		if (unlikely(atio->u.isp24.exchange_addr ==
5558 		    ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5559 			ql_dbg(ql_dbg_io, vha, 0x3065,
5560 			    "qla_target(%d): ATIO_TYPE7 "
5561 			    "received with UNKNOWN exchange address, "
5562 			    "sending QUEUE_FULL\n", vha->vp_idx);
5563 			if (!ha_locked)
5564 				spin_lock_irqsave(&ha->hardware_lock, flags);
5565 			qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5566 			if (!ha_locked)
5567 				spin_unlock_irqrestore(&ha->hardware_lock,
5568 				    flags);
5569 			break;
5570 		}
5571 
5572 		if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5573 			rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5574 			    atio, ha_locked);
5575 			if (rc != 0) {
5576 				tgt->atio_irq_cmd_count--;
5577 				return;
5578 			}
5579 			rc = qlt_handle_cmd_for_atio(vha, atio);
5580 		} else {
5581 			rc = qlt_handle_task_mgmt(vha, atio);
5582 		}
5583 		if (unlikely(rc != 0)) {
5584 			if (!ha_locked)
5585 				spin_lock_irqsave(&ha->hardware_lock, flags);
5586 			switch (rc) {
5587 			case -ENODEV:
5588 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5589 				    "qla_target: Unable to send command to target\n");
5590 				break;
5591 			case -EBADF:
5592 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5593 				    "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5594 				qlt_send_term_exchange(ha->base_qpair, NULL,
5595 				    atio, 1, 0);
5596 				break;
5597 			case -EBUSY:
5598 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5599 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5600 				    vha->vp_idx);
5601 				qlt_send_busy(ha->base_qpair, atio,
5602 				    tc_sam_status);
5603 				break;
5604 			default:
5605 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5606 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5607 				    vha->vp_idx);
5608 				qlt_send_busy(ha->base_qpair, atio,
5609 				    qla_sam_status);
5610 				break;
5611 			}
5612 			if (!ha_locked)
5613 				spin_unlock_irqrestore(&ha->hardware_lock,
5614 				    flags);
5615 		}
5616 		break;
5617 
5618 	case IMMED_NOTIFY_TYPE:
5619 	{
5620 		if (unlikely(atio->u.isp2x.entry_status != 0)) {
5621 			ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5622 			    "qla_target(%d): Received ATIO packet %x "
5623 			    "with error status %x\n", vha->vp_idx,
5624 			    atio->u.raw.entry_type,
5625 			    atio->u.isp2x.entry_status);
5626 			break;
5627 		}
5628 		ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5629 
5630 		if (!ha_locked)
5631 			spin_lock_irqsave(&ha->hardware_lock, flags);
5632 		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5633 		if (!ha_locked)
5634 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
5635 		break;
5636 	}
5637 
5638 	default:
5639 		ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5640 		    "qla_target(%d): Received unknown ATIO atio "
5641 		    "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5642 		break;
5643 	}
5644 
5645 	tgt->atio_irq_cmd_count--;
5646 }
5647 
5648 /*
5649  * qpair lock is assume to be held
5650  * rc = 0 : send terminate & abts respond
5651  * rc != 0: do not send term & abts respond
5652  */
5653 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5654     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5655 {
5656 	struct qla_hw_data *ha = vha->hw;
5657 	int rc = 0;
5658 
5659 	/*
5660 	 * Detect unresolved exchange. If the same ABTS is unable
5661 	 * to terminate an existing command and the same ABTS loops
5662 	 * between FW & Driver, then force FW dump. Under 1 jiff,
5663 	 * we should see multiple loops.
5664 	 */
5665 	if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5666 	    qpair->retry_term_jiff == jiffies) {
5667 		/* found existing exchange */
5668 		qpair->retry_term_cnt++;
5669 		if (qpair->retry_term_cnt >= 5) {
5670 			rc = EIO;
5671 			qpair->retry_term_cnt = 0;
5672 			ql_log(ql_log_warn, vha, 0xffff,
5673 			    "Unable to send ABTS Respond. Dumping firmware.\n");
5674 			ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5675 			    vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5676 
5677 			if (qpair == ha->base_qpair)
5678 				ha->isp_ops->fw_dump(vha, 1);
5679 			else
5680 				ha->isp_ops->fw_dump(vha, 0);
5681 
5682 			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5683 			qla2xxx_wake_dpc(vha);
5684 		}
5685 	} else if (qpair->retry_term_jiff != jiffies) {
5686 		qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5687 		qpair->retry_term_cnt = 0;
5688 		qpair->retry_term_jiff = jiffies;
5689 	}
5690 
5691 	return rc;
5692 }
5693 
5694 
5695 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5696 	struct rsp_que *rsp, response_t *pkt)
5697 {
5698 	struct abts_resp_from_24xx_fw *entry =
5699 		(struct abts_resp_from_24xx_fw *)pkt;
5700 	u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5701 	struct qla_tgt_mgmt_cmd *mcmd;
5702 	struct qla_hw_data *ha = vha->hw;
5703 
5704 	mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5705 	if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5706 		ql_dbg(ql_dbg_async, vha, 0xe064,
5707 		    "qla_target(%d): ABTS Comp without mcmd\n",
5708 		    vha->vp_idx);
5709 		return;
5710 	}
5711 
5712 	if (mcmd)
5713 		vha  = mcmd->vha;
5714 	vha->vha_tgt.qla_tgt->abts_resp_expected--;
5715 
5716 	ql_dbg(ql_dbg_tgt, vha, 0xe038,
5717 	    "ABTS_RESP_24XX: compl_status %x\n",
5718 	    entry->compl_status);
5719 
5720 	if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5721 		if ((entry->error_subcode1 == 0x1E) &&
5722 		    (entry->error_subcode2 == 0)) {
5723 			if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5724 				ha->tgt.tgt_ops->free_mcmd(mcmd);
5725 				return;
5726 			}
5727 			qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5728 			    pkt, mcmd);
5729 		} else {
5730 			ql_dbg(ql_dbg_tgt, vha, 0xe063,
5731 			    "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5732 			    vha->vp_idx, entry->compl_status,
5733 			    entry->error_subcode1,
5734 			    entry->error_subcode2);
5735 			ha->tgt.tgt_ops->free_mcmd(mcmd);
5736 		}
5737 	} else if (mcmd) {
5738 		ha->tgt.tgt_ops->free_mcmd(mcmd);
5739 	}
5740 }
5741 
5742 /* ha->hardware_lock supposed to be held on entry */
5743 /* called via callback from qla2xxx */
5744 static void qlt_response_pkt(struct scsi_qla_host *vha,
5745 	struct rsp_que *rsp, response_t *pkt)
5746 {
5747 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5748 
5749 	if (unlikely(tgt == NULL)) {
5750 		ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5751 		    "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5752 		    vha->vp_idx, pkt->entry_type, vha->hw);
5753 		return;
5754 	}
5755 
5756 	/*
5757 	 * In tgt_stop mode we also should allow all requests to pass.
5758 	 * Otherwise, some commands can stuck.
5759 	 */
5760 
5761 	switch (pkt->entry_type) {
5762 	case CTIO_CRC2:
5763 	case CTIO_TYPE7:
5764 	{
5765 		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5766 
5767 		qlt_do_ctio_completion(vha, rsp, entry->handle,
5768 		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5769 		    entry);
5770 		break;
5771 	}
5772 
5773 	case ACCEPT_TGT_IO_TYPE:
5774 	{
5775 		struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5776 		int rc;
5777 
5778 		if (atio->u.isp2x.status !=
5779 		    cpu_to_le16(ATIO_CDB_VALID)) {
5780 			ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5781 			    "qla_target(%d): ATIO with error "
5782 			    "status %x received\n", vha->vp_idx,
5783 			    le16_to_cpu(atio->u.isp2x.status));
5784 			break;
5785 		}
5786 
5787 		rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5788 		if (rc != 0)
5789 			return;
5790 
5791 		rc = qlt_handle_cmd_for_atio(vha, atio);
5792 		if (unlikely(rc != 0)) {
5793 			switch (rc) {
5794 			case -ENODEV:
5795 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5796 				    "qla_target: Unable to send command to target\n");
5797 				break;
5798 			case -EBADF:
5799 				ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5800 				    "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5801 				qlt_send_term_exchange(rsp->qpair, NULL,
5802 				    atio, 1, 0);
5803 				break;
5804 			case -EBUSY:
5805 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5806 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5807 				    vha->vp_idx);
5808 				qlt_send_busy(rsp->qpair, atio,
5809 				    tc_sam_status);
5810 				break;
5811 			default:
5812 				ql_dbg(ql_dbg_tgt, vha, 0xe060,
5813 				    "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5814 				    vha->vp_idx);
5815 				qlt_send_busy(rsp->qpair, atio,
5816 				    qla_sam_status);
5817 				break;
5818 			}
5819 		}
5820 	}
5821 	break;
5822 
5823 	case CONTINUE_TGT_IO_TYPE:
5824 	{
5825 		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5826 
5827 		qlt_do_ctio_completion(vha, rsp, entry->handle,
5828 		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5829 		    entry);
5830 		break;
5831 	}
5832 
5833 	case CTIO_A64_TYPE:
5834 	{
5835 		struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5836 
5837 		qlt_do_ctio_completion(vha, rsp, entry->handle,
5838 		    le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5839 		    entry);
5840 		break;
5841 	}
5842 
5843 	case IMMED_NOTIFY_TYPE:
5844 		ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5845 		qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5846 		break;
5847 
5848 	case NOTIFY_ACK_TYPE:
5849 		if (tgt->notify_ack_expected > 0) {
5850 			struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5851 
5852 			ql_dbg(ql_dbg_tgt, vha, 0xe036,
5853 			    "NOTIFY_ACK seq %08x status %x\n",
5854 			    le16_to_cpu(entry->u.isp2x.seq_id),
5855 			    le16_to_cpu(entry->u.isp2x.status));
5856 			tgt->notify_ack_expected--;
5857 			if (entry->u.isp2x.status !=
5858 			    cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5859 				ql_dbg(ql_dbg_tgt, vha, 0xe061,
5860 				    "qla_target(%d): NOTIFY_ACK "
5861 				    "failed %x\n", vha->vp_idx,
5862 				    le16_to_cpu(entry->u.isp2x.status));
5863 			}
5864 		} else {
5865 			ql_dbg(ql_dbg_tgt, vha, 0xe062,
5866 			    "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5867 			    vha->vp_idx);
5868 		}
5869 		break;
5870 
5871 	case ABTS_RECV_24XX:
5872 		ql_dbg(ql_dbg_tgt, vha, 0xe037,
5873 		    "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5874 		qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5875 		break;
5876 
5877 	case ABTS_RESP_24XX:
5878 		if (tgt->abts_resp_expected > 0) {
5879 			qlt_handle_abts_completion(vha, rsp, pkt);
5880 		} else {
5881 			ql_dbg(ql_dbg_tgt, vha, 0xe064,
5882 			    "qla_target(%d): Unexpected ABTS_RESP_24XX "
5883 			    "received\n", vha->vp_idx);
5884 		}
5885 		break;
5886 
5887 	default:
5888 		ql_dbg(ql_dbg_tgt, vha, 0xe065,
5889 		    "qla_target(%d): Received unknown response pkt "
5890 		    "type %x\n", vha->vp_idx, pkt->entry_type);
5891 		break;
5892 	}
5893 
5894 }
5895 
5896 /*
5897  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5898  */
5899 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5900 	uint16_t *mailbox)
5901 {
5902 	struct qla_hw_data *ha = vha->hw;
5903 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5904 	int login_code;
5905 
5906 	if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5907 		return;
5908 
5909 	if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5910 	    IS_QLA2100(ha))
5911 		return;
5912 	/*
5913 	 * In tgt_stop mode we also should allow all requests to pass.
5914 	 * Otherwise, some commands can stuck.
5915 	 */
5916 
5917 
5918 	switch (code) {
5919 	case MBA_RESET:			/* Reset */
5920 	case MBA_SYSTEM_ERR:		/* System Error */
5921 	case MBA_REQ_TRANSFER_ERR:	/* Request Transfer Error */
5922 	case MBA_RSP_TRANSFER_ERR:	/* Response Transfer Error */
5923 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5924 		    "qla_target(%d): System error async event %#x "
5925 		    "occurred", vha->vp_idx, code);
5926 		break;
5927 	case MBA_WAKEUP_THRES:		/* Request Queue Wake-up. */
5928 		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5929 		break;
5930 
5931 	case MBA_LOOP_UP:
5932 	{
5933 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5934 		    "qla_target(%d): Async LOOP_UP occurred "
5935 		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5936 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5937 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5938 		if (tgt->link_reinit_iocb_pending) {
5939 			qlt_send_notify_ack(ha->base_qpair,
5940 			    (void *)&tgt->link_reinit_iocb,
5941 			    0, 0, 0, 0, 0, 0);
5942 			tgt->link_reinit_iocb_pending = 0;
5943 		}
5944 		break;
5945 	}
5946 
5947 	case MBA_LIP_OCCURRED:
5948 	case MBA_LOOP_DOWN:
5949 	case MBA_LIP_RESET:
5950 	case MBA_RSCN_UPDATE:
5951 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5952 		    "qla_target(%d): Async event %#x occurred "
5953 		    "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5954 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5955 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5956 		break;
5957 
5958 	case MBA_REJECTED_FCP_CMD:
5959 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5960 		    "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5961 		    vha->vp_idx,
5962 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5963 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5964 
5965 		if (le16_to_cpu(mailbox[3]) == 1) {
5966 			/* exchange starvation. */
5967 			vha->hw->exch_starvation++;
5968 			if (vha->hw->exch_starvation > 5) {
5969 				ql_log(ql_log_warn, vha, 0xd03a,
5970 				    "Exchange starvation-. Resetting RISC\n");
5971 
5972 				vha->hw->exch_starvation = 0;
5973 				if (IS_P3P_TYPE(vha->hw))
5974 					set_bit(FCOE_CTX_RESET_NEEDED,
5975 					    &vha->dpc_flags);
5976 				else
5977 					set_bit(ISP_ABORT_NEEDED,
5978 					    &vha->dpc_flags);
5979 				qla2xxx_wake_dpc(vha);
5980 			}
5981 		}
5982 		break;
5983 
5984 	case MBA_PORT_UPDATE:
5985 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5986 		    "qla_target(%d): Port update async event %#x "
5987 		    "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5988 		    "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5989 		    le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5990 		    le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5991 
5992 		login_code = le16_to_cpu(mailbox[2]);
5993 		if (login_code == 0x4) {
5994 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5995 			    "Async MB 2: Got PLOGI Complete\n");
5996 			vha->hw->exch_starvation = 0;
5997 		} else if (login_code == 0x7)
5998 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5999 			    "Async MB 2: Port Logged Out\n");
6000 		break;
6001 	default:
6002 		break;
6003 	}
6004 
6005 }
6006 
6007 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6008 	uint16_t loop_id)
6009 {
6010 	fc_port_t *fcport, *tfcp, *del;
6011 	int rc;
6012 	unsigned long flags;
6013 	u8 newfcport = 0;
6014 
6015 	fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6016 	if (!fcport) {
6017 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6018 		    "qla_target(%d): Allocation of tmp FC port failed",
6019 		    vha->vp_idx);
6020 		return NULL;
6021 	}
6022 
6023 	fcport->loop_id = loop_id;
6024 
6025 	rc = qla24xx_gpdb_wait(vha, fcport, 0);
6026 	if (rc != QLA_SUCCESS) {
6027 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6028 		    "qla_target(%d): Failed to retrieve fcport "
6029 		    "information -- get_port_database() returned %x "
6030 		    "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6031 		kfree(fcport);
6032 		return NULL;
6033 	}
6034 
6035 	del = NULL;
6036 	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6037 	tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6038 
6039 	if (tfcp) {
6040 		tfcp->d_id = fcport->d_id;
6041 		tfcp->port_type = fcport->port_type;
6042 		tfcp->supported_classes = fcport->supported_classes;
6043 		tfcp->flags |= fcport->flags;
6044 		tfcp->scan_state = QLA_FCPORT_FOUND;
6045 
6046 		del = fcport;
6047 		fcport = tfcp;
6048 	} else {
6049 		if (vha->hw->current_topology == ISP_CFG_F)
6050 			fcport->flags |= FCF_FABRIC_DEVICE;
6051 
6052 		list_add_tail(&fcport->list, &vha->vp_fcports);
6053 		if (!IS_SW_RESV_ADDR(fcport->d_id))
6054 		   vha->fcport_count++;
6055 		fcport->login_gen++;
6056 		fcport->disc_state = DSC_LOGIN_COMPLETE;
6057 		fcport->login_succ = 1;
6058 		newfcport = 1;
6059 	}
6060 
6061 	fcport->deleted = 0;
6062 	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6063 
6064 	switch (vha->host->active_mode) {
6065 	case MODE_INITIATOR:
6066 	case MODE_DUAL:
6067 		if (newfcport) {
6068 			if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6069 				qla24xx_sched_upd_fcport(fcport);
6070 			} else {
6071 				ql_dbg(ql_dbg_disc, vha, 0x20ff,
6072 				   "%s %d %8phC post gpsc fcp_cnt %d\n",
6073 				   __func__, __LINE__, fcport->port_name, vha->fcport_count);
6074 				qla24xx_post_gpsc_work(vha, fcport);
6075 			}
6076 		}
6077 		break;
6078 
6079 	case MODE_TARGET:
6080 	default:
6081 		break;
6082 	}
6083 	if (del)
6084 		qla2x00_free_fcport(del);
6085 
6086 	return fcport;
6087 }
6088 
6089 /* Must be called under tgt_mutex */
6090 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6091 					   be_id_t s_id)
6092 {
6093 	struct fc_port *sess = NULL;
6094 	fc_port_t *fcport = NULL;
6095 	int rc, global_resets;
6096 	uint16_t loop_id = 0;
6097 
6098 	if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6099 		/*
6100 		 * This is Domain Controller, so it should be
6101 		 * OK to drop SCSI commands from it.
6102 		 */
6103 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6104 		    "Unable to find initiator with S_ID %x:%x:%x",
6105 		    s_id.domain, s_id.area, s_id.al_pa);
6106 		return NULL;
6107 	}
6108 
6109 	mutex_lock(&vha->vha_tgt.tgt_mutex);
6110 
6111 retry:
6112 	global_resets =
6113 	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6114 
6115 	rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6116 	if (rc != 0) {
6117 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
6118 
6119 		ql_log(ql_log_info, vha, 0xf071,
6120 		    "qla_target(%d): Unable to find "
6121 		    "initiator with S_ID %x:%x:%x",
6122 		    vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6123 
6124 		if (rc == -ENOENT) {
6125 			qlt_port_logo_t logo;
6126 
6127 			logo.id = be_to_port_id(s_id);
6128 			logo.cmd_count = 1;
6129 			qlt_send_first_logo(vha, &logo);
6130 		}
6131 
6132 		return NULL;
6133 	}
6134 
6135 	fcport = qlt_get_port_database(vha, loop_id);
6136 	if (!fcport) {
6137 		mutex_unlock(&vha->vha_tgt.tgt_mutex);
6138 		return NULL;
6139 	}
6140 
6141 	if (global_resets !=
6142 	    atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6143 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6144 		    "qla_target(%d): global reset during session discovery "
6145 		    "(counter was %d, new %d), retrying", vha->vp_idx,
6146 		    global_resets,
6147 		    atomic_read(&vha->vha_tgt.
6148 			qla_tgt->tgt_global_resets_count));
6149 		goto retry;
6150 	}
6151 
6152 	sess = qlt_create_sess(vha, fcport, true);
6153 
6154 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
6155 
6156 	return sess;
6157 }
6158 
6159 static void qlt_abort_work(struct qla_tgt *tgt,
6160 	struct qla_tgt_sess_work_param *prm)
6161 {
6162 	struct scsi_qla_host *vha = tgt->vha;
6163 	struct qla_hw_data *ha = vha->hw;
6164 	struct fc_port *sess = NULL;
6165 	unsigned long flags = 0, flags2 = 0;
6166 	be_id_t s_id;
6167 	int rc;
6168 
6169 	spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6170 
6171 	if (tgt->tgt_stop)
6172 		goto out_term2;
6173 
6174 	s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6175 
6176 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6177 	if (!sess) {
6178 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6179 
6180 		sess = qlt_make_local_sess(vha, s_id);
6181 		/* sess has got an extra creation ref */
6182 
6183 		spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6184 		if (!sess)
6185 			goto out_term2;
6186 	} else {
6187 		if (sess->deleted) {
6188 			sess = NULL;
6189 			goto out_term2;
6190 		}
6191 
6192 		if (!kref_get_unless_zero(&sess->sess_kref)) {
6193 			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6194 			    "%s: kref_get fail %8phC \n",
6195 			     __func__, sess->port_name);
6196 			sess = NULL;
6197 			goto out_term2;
6198 		}
6199 	}
6200 
6201 	rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6202 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6203 
6204 	ha->tgt.tgt_ops->put_sess(sess);
6205 
6206 	if (rc != 0)
6207 		goto out_term;
6208 	return;
6209 
6210 out_term2:
6211 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6212 
6213 out_term:
6214 	spin_lock_irqsave(&ha->hardware_lock, flags);
6215 	qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6216 	    FCP_TMF_REJECTED, false);
6217 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6218 }
6219 
6220 static void qlt_tmr_work(struct qla_tgt *tgt,
6221 	struct qla_tgt_sess_work_param *prm)
6222 {
6223 	struct atio_from_isp *a = &prm->tm_iocb2;
6224 	struct scsi_qla_host *vha = tgt->vha;
6225 	struct qla_hw_data *ha = vha->hw;
6226 	struct fc_port *sess;
6227 	unsigned long flags;
6228 	be_id_t s_id;
6229 	int rc;
6230 	u64 unpacked_lun;
6231 	int fn;
6232 	void *iocb;
6233 
6234 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6235 
6236 	if (tgt->tgt_stop)
6237 		goto out_term2;
6238 
6239 	s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6240 	sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6241 	if (!sess) {
6242 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6243 
6244 		sess = qlt_make_local_sess(vha, s_id);
6245 		/* sess has got an extra creation ref */
6246 
6247 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6248 		if (!sess)
6249 			goto out_term2;
6250 	} else {
6251 		if (sess->deleted) {
6252 			goto out_term2;
6253 		}
6254 
6255 		if (!kref_get_unless_zero(&sess->sess_kref)) {
6256 			ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6257 			    "%s: kref_get fail %8phC\n",
6258 			     __func__, sess->port_name);
6259 			goto out_term2;
6260 		}
6261 	}
6262 
6263 	iocb = a;
6264 	fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6265 	unpacked_lun =
6266 	    scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6267 
6268 	rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6269 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6270 
6271 	ha->tgt.tgt_ops->put_sess(sess);
6272 
6273 	if (rc != 0)
6274 		goto out_term;
6275 	return;
6276 
6277 out_term2:
6278 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6279 out_term:
6280 	qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6281 }
6282 
6283 static void qlt_sess_work_fn(struct work_struct *work)
6284 {
6285 	struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6286 	struct scsi_qla_host *vha = tgt->vha;
6287 	unsigned long flags;
6288 
6289 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6290 
6291 	spin_lock_irqsave(&tgt->sess_work_lock, flags);
6292 	while (!list_empty(&tgt->sess_works_list)) {
6293 		struct qla_tgt_sess_work_param *prm = list_entry(
6294 		    tgt->sess_works_list.next, typeof(*prm),
6295 		    sess_works_list_entry);
6296 
6297 		/*
6298 		 * This work can be scheduled on several CPUs at time, so we
6299 		 * must delete the entry to eliminate double processing
6300 		 */
6301 		list_del(&prm->sess_works_list_entry);
6302 
6303 		spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6304 
6305 		switch (prm->type) {
6306 		case QLA_TGT_SESS_WORK_ABORT:
6307 			qlt_abort_work(tgt, prm);
6308 			break;
6309 		case QLA_TGT_SESS_WORK_TM:
6310 			qlt_tmr_work(tgt, prm);
6311 			break;
6312 		default:
6313 			BUG_ON(1);
6314 			break;
6315 		}
6316 
6317 		spin_lock_irqsave(&tgt->sess_work_lock, flags);
6318 
6319 		kfree(prm);
6320 	}
6321 	spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6322 }
6323 
6324 /* Must be called under tgt_host_action_mutex */
6325 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6326 {
6327 	struct qla_tgt *tgt;
6328 	int rc, i;
6329 	struct qla_qpair_hint *h;
6330 
6331 	if (!QLA_TGT_MODE_ENABLED())
6332 		return 0;
6333 
6334 	if (!IS_TGT_MODE_CAPABLE(ha)) {
6335 		ql_log(ql_log_warn, base_vha, 0xe070,
6336 		    "This adapter does not support target mode.\n");
6337 		return 0;
6338 	}
6339 
6340 	ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6341 	    "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6342 
6343 	BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6344 
6345 	tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6346 	if (!tgt) {
6347 		ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6348 		    "Unable to allocate struct qla_tgt\n");
6349 		return -ENOMEM;
6350 	}
6351 
6352 	tgt->qphints = kcalloc(ha->max_qpairs + 1,
6353 			       sizeof(struct qla_qpair_hint),
6354 			       GFP_KERNEL);
6355 	if (!tgt->qphints) {
6356 		kfree(tgt);
6357 		ql_log(ql_log_warn, base_vha, 0x0197,
6358 		    "Unable to allocate qpair hints.\n");
6359 		return -ENOMEM;
6360 	}
6361 
6362 	if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6363 		base_vha->host->hostt->supported_mode |= MODE_TARGET;
6364 
6365 	rc = btree_init64(&tgt->lun_qpair_map);
6366 	if (rc) {
6367 		kfree(tgt->qphints);
6368 		kfree(tgt);
6369 		ql_log(ql_log_info, base_vha, 0x0198,
6370 			"Unable to initialize lun_qpair_map btree\n");
6371 		return -EIO;
6372 	}
6373 	h = &tgt->qphints[0];
6374 	h->qpair = ha->base_qpair;
6375 	INIT_LIST_HEAD(&h->hint_elem);
6376 	h->cpuid = ha->base_qpair->cpuid;
6377 	list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6378 
6379 	for (i = 0; i < ha->max_qpairs; i++) {
6380 		unsigned long flags;
6381 
6382 		struct qla_qpair *qpair = ha->queue_pair_map[i];
6383 
6384 		h = &tgt->qphints[i + 1];
6385 		INIT_LIST_HEAD(&h->hint_elem);
6386 		if (qpair) {
6387 			h->qpair = qpair;
6388 			spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6389 			list_add_tail(&h->hint_elem, &qpair->hints_list);
6390 			spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6391 			h->cpuid = qpair->cpuid;
6392 		}
6393 	}
6394 
6395 	tgt->ha = ha;
6396 	tgt->vha = base_vha;
6397 	init_waitqueue_head(&tgt->waitQ);
6398 	INIT_LIST_HEAD(&tgt->del_sess_list);
6399 	spin_lock_init(&tgt->sess_work_lock);
6400 	INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6401 	INIT_LIST_HEAD(&tgt->sess_works_list);
6402 	atomic_set(&tgt->tgt_global_resets_count, 0);
6403 
6404 	base_vha->vha_tgt.qla_tgt = tgt;
6405 
6406 	ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6407 		"qla_target(%d): using 64 Bit PCI addressing",
6408 		base_vha->vp_idx);
6409 	/* 3 is reserved */
6410 	tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6411 
6412 	mutex_lock(&qla_tgt_mutex);
6413 	list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6414 	mutex_unlock(&qla_tgt_mutex);
6415 
6416 	if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6417 		ha->tgt.tgt_ops->add_target(base_vha);
6418 
6419 	return 0;
6420 }
6421 
6422 /* Must be called under tgt_host_action_mutex */
6423 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6424 {
6425 	if (!vha->vha_tgt.qla_tgt)
6426 		return 0;
6427 
6428 	if (vha->fc_vport) {
6429 		qlt_release(vha->vha_tgt.qla_tgt);
6430 		return 0;
6431 	}
6432 
6433 	/* free left over qfull cmds */
6434 	qlt_init_term_exchange(vha);
6435 
6436 	ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6437 	    vha->host_no, ha);
6438 	qlt_release(vha->vha_tgt.qla_tgt);
6439 
6440 	return 0;
6441 }
6442 
6443 void qlt_remove_target_resources(struct qla_hw_data *ha)
6444 {
6445 	struct scsi_qla_host *node;
6446 	u32 key = 0;
6447 
6448 	btree_for_each_safe32(&ha->tgt.host_map, key, node)
6449 		btree_remove32(&ha->tgt.host_map, key);
6450 
6451 	btree_destroy32(&ha->tgt.host_map);
6452 }
6453 
6454 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6455 	unsigned char *b)
6456 {
6457 	pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6458 	pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6459 	put_unaligned_be64(wwpn, b);
6460 	pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6461 }
6462 
6463 /**
6464  * qla_tgt_lport_register - register lport with external module
6465  *
6466  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6467  * @phys_wwpn: physical port WWPN
6468  * @npiv_wwpn: NPIV WWPN
6469  * @npiv_wwnn: NPIV WWNN
6470  * @callback:  lport initialization callback for tcm_qla2xxx code
6471  */
6472 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6473 		       u64 npiv_wwpn, u64 npiv_wwnn,
6474 		       int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6475 {
6476 	struct qla_tgt *tgt;
6477 	struct scsi_qla_host *vha;
6478 	struct qla_hw_data *ha;
6479 	struct Scsi_Host *host;
6480 	unsigned long flags;
6481 	int rc;
6482 	u8 b[WWN_SIZE];
6483 
6484 	mutex_lock(&qla_tgt_mutex);
6485 	list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6486 		vha = tgt->vha;
6487 		ha = vha->hw;
6488 
6489 		host = vha->host;
6490 		if (!host)
6491 			continue;
6492 
6493 		if (!(host->hostt->supported_mode & MODE_TARGET))
6494 			continue;
6495 
6496 		if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6497 			continue;
6498 
6499 		spin_lock_irqsave(&ha->hardware_lock, flags);
6500 		if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6501 			pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6502 			    host->host_no);
6503 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
6504 			continue;
6505 		}
6506 		if (tgt->tgt_stop) {
6507 			pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6508 				 host->host_no);
6509 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
6510 			continue;
6511 		}
6512 		spin_unlock_irqrestore(&ha->hardware_lock, flags);
6513 
6514 		if (!scsi_host_get(host)) {
6515 			ql_dbg(ql_dbg_tgt, vha, 0xe068,
6516 			    "Unable to scsi_host_get() for"
6517 			    " qla2xxx scsi_host\n");
6518 			continue;
6519 		}
6520 		qlt_lport_dump(vha, phys_wwpn, b);
6521 
6522 		if (memcmp(vha->port_name, b, WWN_SIZE)) {
6523 			scsi_host_put(host);
6524 			continue;
6525 		}
6526 		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6527 		if (rc != 0)
6528 			scsi_host_put(host);
6529 
6530 		mutex_unlock(&qla_tgt_mutex);
6531 		return rc;
6532 	}
6533 	mutex_unlock(&qla_tgt_mutex);
6534 
6535 	return -ENODEV;
6536 }
6537 EXPORT_SYMBOL(qlt_lport_register);
6538 
6539 /**
6540  * qla_tgt_lport_deregister - Degister lport
6541  *
6542  * @vha:  Registered scsi_qla_host pointer
6543  */
6544 void qlt_lport_deregister(struct scsi_qla_host *vha)
6545 {
6546 	struct qla_hw_data *ha = vha->hw;
6547 	struct Scsi_Host *sh = vha->host;
6548 	/*
6549 	 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6550 	 */
6551 	vha->vha_tgt.target_lport_ptr = NULL;
6552 	ha->tgt.tgt_ops = NULL;
6553 	/*
6554 	 * Release the Scsi_Host reference for the underlying qla2xxx host
6555 	 */
6556 	scsi_host_put(sh);
6557 }
6558 EXPORT_SYMBOL(qlt_lport_deregister);
6559 
6560 /* Must be called under HW lock */
6561 void qlt_set_mode(struct scsi_qla_host *vha)
6562 {
6563 	switch (vha->qlini_mode) {
6564 	case QLA2XXX_INI_MODE_DISABLED:
6565 	case QLA2XXX_INI_MODE_EXCLUSIVE:
6566 		vha->host->active_mode = MODE_TARGET;
6567 		break;
6568 	case QLA2XXX_INI_MODE_ENABLED:
6569 		vha->host->active_mode = MODE_INITIATOR;
6570 		break;
6571 	case QLA2XXX_INI_MODE_DUAL:
6572 		vha->host->active_mode = MODE_DUAL;
6573 		break;
6574 	default:
6575 		break;
6576 	}
6577 }
6578 
6579 /* Must be called under HW lock */
6580 static void qlt_clear_mode(struct scsi_qla_host *vha)
6581 {
6582 	switch (vha->qlini_mode) {
6583 	case QLA2XXX_INI_MODE_DISABLED:
6584 		vha->host->active_mode = MODE_UNKNOWN;
6585 		break;
6586 	case QLA2XXX_INI_MODE_EXCLUSIVE:
6587 		vha->host->active_mode = MODE_INITIATOR;
6588 		break;
6589 	case QLA2XXX_INI_MODE_ENABLED:
6590 	case QLA2XXX_INI_MODE_DUAL:
6591 		vha->host->active_mode = MODE_INITIATOR;
6592 		break;
6593 	default:
6594 		break;
6595 	}
6596 }
6597 
6598 /*
6599  * qla_tgt_enable_vha - NO LOCK HELD
6600  *
6601  * host_reset, bring up w/ Target Mode Enabled
6602  */
6603 void
6604 qlt_enable_vha(struct scsi_qla_host *vha)
6605 {
6606 	struct qla_hw_data *ha = vha->hw;
6607 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6608 	unsigned long flags;
6609 	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6610 
6611 	if (!tgt) {
6612 		ql_dbg(ql_dbg_tgt, vha, 0xe069,
6613 		    "Unable to locate qla_tgt pointer from"
6614 		    " struct qla_hw_data\n");
6615 		dump_stack();
6616 		return;
6617 	}
6618 	if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6619 		return;
6620 
6621 	if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6622 		ha->tgt.num_act_qpairs = ha->max_qpairs;
6623 	spin_lock_irqsave(&ha->hardware_lock, flags);
6624 	tgt->tgt_stopped = 0;
6625 	qlt_set_mode(vha);
6626 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6627 
6628 	mutex_lock(&ha->optrom_mutex);
6629 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6630 	    "%s.\n", __func__);
6631 	if (vha->vp_idx) {
6632 		qla24xx_disable_vp(vha);
6633 		qla24xx_enable_vp(vha);
6634 	} else {
6635 		set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6636 		qla2xxx_wake_dpc(base_vha);
6637 		WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6638 			     QLA_SUCCESS);
6639 	}
6640 	mutex_unlock(&ha->optrom_mutex);
6641 }
6642 EXPORT_SYMBOL(qlt_enable_vha);
6643 
6644 /*
6645  * qla_tgt_disable_vha - NO LOCK HELD
6646  *
6647  * Disable Target Mode and reset the adapter
6648  */
6649 static void qlt_disable_vha(struct scsi_qla_host *vha)
6650 {
6651 	struct qla_hw_data *ha = vha->hw;
6652 	struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6653 	unsigned long flags;
6654 
6655 	if (!tgt) {
6656 		ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6657 		    "Unable to locate qla_tgt pointer from"
6658 		    " struct qla_hw_data\n");
6659 		dump_stack();
6660 		return;
6661 	}
6662 
6663 	spin_lock_irqsave(&ha->hardware_lock, flags);
6664 	qlt_clear_mode(vha);
6665 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
6666 
6667 	set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6668 	qla2xxx_wake_dpc(vha);
6669 	if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6670 		ql_dbg(ql_dbg_tgt, vha, 0xe081,
6671 		       "qla2x00_wait_for_hba_online() failed\n");
6672 }
6673 
6674 /*
6675  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6676  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6677  * members.
6678  */
6679 void
6680 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6681 {
6682 	vha->vha_tgt.qla_tgt = NULL;
6683 
6684 	mutex_init(&vha->vha_tgt.tgt_mutex);
6685 	mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6686 
6687 	qlt_clear_mode(vha);
6688 
6689 	/*
6690 	 * NOTE: Currently the value is kept the same for <24xx and
6691 	 * >=24xx ISPs. If it is necessary to change it,
6692 	 * the check should be added for specific ISPs,
6693 	 * assigning the value appropriately.
6694 	 */
6695 	ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6696 
6697 	qlt_add_target(ha, vha);
6698 }
6699 
6700 u8
6701 qlt_rff_id(struct scsi_qla_host *vha)
6702 {
6703 	u8 fc4_feature = 0;
6704 	/*
6705 	 * FC-4 Feature bit 0 indicates target functionality to the name server.
6706 	 */
6707 	if (qla_tgt_mode_enabled(vha)) {
6708 		fc4_feature = BIT_0;
6709 	} else if (qla_ini_mode_enabled(vha)) {
6710 		fc4_feature = BIT_1;
6711 	} else if (qla_dual_mode_enabled(vha))
6712 		fc4_feature = BIT_0 | BIT_1;
6713 
6714 	return fc4_feature;
6715 }
6716 
6717 /*
6718  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6719  * @ha: HA context
6720  *
6721  * Beginning of ATIO ring has initialization control block already built
6722  * by nvram config routine.
6723  *
6724  * Returns 0 on success.
6725  */
6726 void
6727 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6728 {
6729 	struct qla_hw_data *ha = vha->hw;
6730 	uint16_t cnt;
6731 	struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6732 
6733 	if (qla_ini_mode_enabled(vha))
6734 		return;
6735 
6736 	for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6737 		pkt->u.raw.signature = ATIO_PROCESSED;
6738 		pkt++;
6739 	}
6740 
6741 }
6742 
6743 /*
6744  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6745  * @ha: SCSI driver HA context
6746  */
6747 void
6748 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6749 {
6750 	struct qla_hw_data *ha = vha->hw;
6751 	struct atio_from_isp *pkt;
6752 	int cnt, i;
6753 
6754 	if (!ha->flags.fw_started)
6755 		return;
6756 
6757 	while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6758 	    fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6759 		pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6760 		cnt = pkt->u.raw.entry_count;
6761 
6762 		if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6763 			/*
6764 			 * This packet is corrupted. The header + payload
6765 			 * can not be trusted. There is no point in passing
6766 			 * it further up.
6767 			 */
6768 			ql_log(ql_log_warn, vha, 0xd03c,
6769 			    "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6770 			    &pkt->u.isp24.fcp_hdr.s_id,
6771 			    be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6772 			    le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6773 
6774 			adjust_corrupted_atio(pkt);
6775 			qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6776 			    ha_locked, 0);
6777 		} else {
6778 			qlt_24xx_atio_pkt_all_vps(vha,
6779 			    (struct atio_from_isp *)pkt, ha_locked);
6780 		}
6781 
6782 		for (i = 0; i < cnt; i++) {
6783 			ha->tgt.atio_ring_index++;
6784 			if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6785 				ha->tgt.atio_ring_index = 0;
6786 				ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6787 			} else
6788 				ha->tgt.atio_ring_ptr++;
6789 
6790 			pkt->u.raw.signature = ATIO_PROCESSED;
6791 			pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6792 		}
6793 		wmb();
6794 	}
6795 
6796 	/* Adjust ring index */
6797 	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6798 }
6799 
6800 void
6801 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6802 {
6803 	struct qla_hw_data *ha = vha->hw;
6804 	struct qla_msix_entry *msix = &ha->msix_entries[2];
6805 	struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6806 
6807 	if (!QLA_TGT_MODE_ENABLED())
6808 		return;
6809 
6810 	WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6811 	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6812 	RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6813 
6814 	if (ha->flags.msix_enabled) {
6815 		if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6816 			if (IS_QLA2071(ha)) {
6817 				/* 4 ports Baker: Enable Interrupt Handshake */
6818 				icb->msix_atio = 0;
6819 				icb->firmware_options_2 |= BIT_26;
6820 			} else {
6821 				icb->msix_atio = cpu_to_le16(msix->entry);
6822 				icb->firmware_options_2 &= ~BIT_26;
6823 			}
6824 			ql_dbg(ql_dbg_init, vha, 0xf072,
6825 			    "Registering ICB vector 0x%x for atio que.\n",
6826 			    msix->entry);
6827 		}
6828 	} else {
6829 		/* INTx|MSI */
6830 		if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6831 			icb->msix_atio = 0;
6832 			icb->firmware_options_2 |= BIT_26;
6833 			ql_dbg(ql_dbg_init, vha, 0xf072,
6834 			    "%s: Use INTx for ATIOQ.\n", __func__);
6835 		}
6836 	}
6837 }
6838 
6839 void
6840 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6841 {
6842 	struct qla_hw_data *ha = vha->hw;
6843 	u32 tmp;
6844 
6845 	if (!QLA_TGT_MODE_ENABLED())
6846 		return;
6847 
6848 	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6849 		if (!ha->tgt.saved_set) {
6850 			/* We save only once */
6851 			ha->tgt.saved_exchange_count = nv->exchange_count;
6852 			ha->tgt.saved_firmware_options_1 =
6853 			    nv->firmware_options_1;
6854 			ha->tgt.saved_firmware_options_2 =
6855 			    nv->firmware_options_2;
6856 			ha->tgt.saved_firmware_options_3 =
6857 			    nv->firmware_options_3;
6858 			ha->tgt.saved_set = 1;
6859 		}
6860 
6861 		if (qla_tgt_mode_enabled(vha))
6862 			nv->exchange_count = cpu_to_le16(0xFFFF);
6863 		else			/* dual */
6864 			nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6865 
6866 		/* Enable target mode */
6867 		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6868 
6869 		/* Disable ini mode, if requested */
6870 		if (qla_tgt_mode_enabled(vha))
6871 			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6872 
6873 		/* Disable Full Login after LIP */
6874 		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6875 		/* Enable initial LIP */
6876 		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6877 		if (ql2xtgt_tape_enable)
6878 			/* Enable FC Tape support */
6879 			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6880 		else
6881 			/* Disable FC Tape support */
6882 			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6883 
6884 		/* Disable Full Login after LIP */
6885 		nv->host_p &= cpu_to_le32(~BIT_10);
6886 
6887 		/*
6888 		 * clear BIT 15 explicitly as we have seen at least
6889 		 * a couple of instances where this was set and this
6890 		 * was causing the firmware to not be initialized.
6891 		 */
6892 		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6893 		/* Enable target PRLI control */
6894 		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6895 
6896 		if (IS_QLA25XX(ha)) {
6897 			/* Change Loop-prefer to Pt-Pt */
6898 			tmp = ~(BIT_4|BIT_5|BIT_6);
6899 			nv->firmware_options_2 &= cpu_to_le32(tmp);
6900 			tmp = P2P << 4;
6901 			nv->firmware_options_2 |= cpu_to_le32(tmp);
6902 		}
6903 	} else {
6904 		if (ha->tgt.saved_set) {
6905 			nv->exchange_count = ha->tgt.saved_exchange_count;
6906 			nv->firmware_options_1 =
6907 			    ha->tgt.saved_firmware_options_1;
6908 			nv->firmware_options_2 =
6909 			    ha->tgt.saved_firmware_options_2;
6910 			nv->firmware_options_3 =
6911 			    ha->tgt.saved_firmware_options_3;
6912 		}
6913 		return;
6914 	}
6915 
6916 	if (ha->base_qpair->enable_class_2) {
6917 		if (vha->flags.init_done)
6918 			fc_host_supported_classes(vha->host) =
6919 				FC_COS_CLASS2 | FC_COS_CLASS3;
6920 
6921 		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6922 	} else {
6923 		if (vha->flags.init_done)
6924 			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6925 
6926 		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6927 	}
6928 }
6929 
6930 void
6931 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6932 	struct init_cb_24xx *icb)
6933 {
6934 	struct qla_hw_data *ha = vha->hw;
6935 
6936 	if (!QLA_TGT_MODE_ENABLED())
6937 		return;
6938 
6939 	if (ha->tgt.node_name_set) {
6940 		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6941 		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6942 	}
6943 }
6944 
6945 void
6946 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6947 {
6948 	struct qla_hw_data *ha = vha->hw;
6949 	u32 tmp;
6950 
6951 	if (!QLA_TGT_MODE_ENABLED())
6952 		return;
6953 
6954 	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6955 		if (!ha->tgt.saved_set) {
6956 			/* We save only once */
6957 			ha->tgt.saved_exchange_count = nv->exchange_count;
6958 			ha->tgt.saved_firmware_options_1 =
6959 			    nv->firmware_options_1;
6960 			ha->tgt.saved_firmware_options_2 =
6961 			    nv->firmware_options_2;
6962 			ha->tgt.saved_firmware_options_3 =
6963 			    nv->firmware_options_3;
6964 			ha->tgt.saved_set = 1;
6965 		}
6966 
6967 		if (qla_tgt_mode_enabled(vha))
6968 			nv->exchange_count = cpu_to_le16(0xFFFF);
6969 		else			/* dual */
6970 			nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6971 
6972 		/* Enable target mode */
6973 		nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6974 
6975 		/* Disable ini mode, if requested */
6976 		if (qla_tgt_mode_enabled(vha))
6977 			nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6978 		/* Disable Full Login after LIP */
6979 		nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6980 		/* Enable initial LIP */
6981 		nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6982 		/*
6983 		 * clear BIT 15 explicitly as we have seen at
6984 		 * least a couple of instances where this was set
6985 		 * and this was causing the firmware to not be
6986 		 * initialized.
6987 		 */
6988 		nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6989 		if (ql2xtgt_tape_enable)
6990 			/* Enable FC tape support */
6991 			nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6992 		else
6993 			/* Disable FC tape support */
6994 			nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6995 
6996 		/* Disable Full Login after LIP */
6997 		nv->host_p &= cpu_to_le32(~BIT_10);
6998 		/* Enable target PRLI control */
6999 		nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7000 
7001 		/* Change Loop-prefer to Pt-Pt */
7002 		tmp = ~(BIT_4|BIT_5|BIT_6);
7003 		nv->firmware_options_2 &= cpu_to_le32(tmp);
7004 		tmp = P2P << 4;
7005 		nv->firmware_options_2 |= cpu_to_le32(tmp);
7006 	} else {
7007 		if (ha->tgt.saved_set) {
7008 			nv->exchange_count = ha->tgt.saved_exchange_count;
7009 			nv->firmware_options_1 =
7010 			    ha->tgt.saved_firmware_options_1;
7011 			nv->firmware_options_2 =
7012 			    ha->tgt.saved_firmware_options_2;
7013 			nv->firmware_options_3 =
7014 			    ha->tgt.saved_firmware_options_3;
7015 		}
7016 		return;
7017 	}
7018 
7019 	if (ha->base_qpair->enable_class_2) {
7020 		if (vha->flags.init_done)
7021 			fc_host_supported_classes(vha->host) =
7022 				FC_COS_CLASS2 | FC_COS_CLASS3;
7023 
7024 		nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7025 	} else {
7026 		if (vha->flags.init_done)
7027 			fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7028 
7029 		nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7030 	}
7031 }
7032 
7033 void
7034 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7035 	struct init_cb_81xx *icb)
7036 {
7037 	struct qla_hw_data *ha = vha->hw;
7038 
7039 	if (!QLA_TGT_MODE_ENABLED())
7040 		return;
7041 
7042 	if (ha->tgt.node_name_set) {
7043 		memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7044 		icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7045 	}
7046 }
7047 
7048 void
7049 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7050 {
7051 	if (!QLA_TGT_MODE_ENABLED())
7052 		return;
7053 
7054 	ha->msix_count += 1; /* For ATIO Q */
7055 }
7056 
7057 
7058 void
7059 qlt_modify_vp_config(struct scsi_qla_host *vha,
7060 	struct vp_config_entry_24xx *vpmod)
7061 {
7062 	/* enable target mode.  Bit5 = 1 => disable */
7063 	if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7064 		vpmod->options_idx1 &= ~BIT_5;
7065 
7066 	/* Disable ini mode, if requested.  bit4 = 1 => disable */
7067 	if (qla_tgt_mode_enabled(vha))
7068 		vpmod->options_idx1 &= ~BIT_4;
7069 }
7070 
7071 void
7072 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7073 {
7074 	int rc;
7075 
7076 	if (!QLA_TGT_MODE_ENABLED())
7077 		return;
7078 
7079 	if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7080 	    IS_QLA28XX(ha)) {
7081 		ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7082 		ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7083 	} else {
7084 		ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7085 		ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7086 	}
7087 
7088 	mutex_init(&base_vha->vha_tgt.tgt_mutex);
7089 	mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7090 
7091 	INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7092 	INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7093 	    qlt_unknown_atio_work_fn);
7094 
7095 	qlt_clear_mode(base_vha);
7096 
7097 	rc = btree_init32(&ha->tgt.host_map);
7098 	if (rc)
7099 		ql_log(ql_log_info, base_vha, 0xd03d,
7100 		    "Unable to initialize ha->host_map btree\n");
7101 
7102 	qlt_update_vp_map(base_vha, SET_VP_IDX);
7103 }
7104 
7105 irqreturn_t
7106 qla83xx_msix_atio_q(int irq, void *dev_id)
7107 {
7108 	struct rsp_que *rsp;
7109 	scsi_qla_host_t	*vha;
7110 	struct qla_hw_data *ha;
7111 	unsigned long flags;
7112 
7113 	rsp = (struct rsp_que *) dev_id;
7114 	ha = rsp->hw;
7115 	vha = pci_get_drvdata(ha->pdev);
7116 
7117 	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7118 
7119 	qlt_24xx_process_atio_queue(vha, 0);
7120 
7121 	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7122 
7123 	return IRQ_HANDLED;
7124 }
7125 
7126 static void
7127 qlt_handle_abts_recv_work(struct work_struct *work)
7128 {
7129 	struct qla_tgt_sess_op *op = container_of(work,
7130 		struct qla_tgt_sess_op, work);
7131 	scsi_qla_host_t *vha = op->vha;
7132 	struct qla_hw_data *ha = vha->hw;
7133 	unsigned long flags;
7134 
7135 	if (qla2x00_reset_active(vha) ||
7136 	    (op->chip_reset != ha->base_qpair->chip_reset))
7137 		return;
7138 
7139 	spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7140 	qlt_24xx_process_atio_queue(vha, 0);
7141 	spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7142 
7143 	spin_lock_irqsave(&ha->hardware_lock, flags);
7144 	qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7145 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
7146 
7147 	kfree(op);
7148 }
7149 
7150 void
7151 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7152     response_t *pkt)
7153 {
7154 	struct qla_tgt_sess_op *op;
7155 
7156 	op = kzalloc(sizeof(*op), GFP_ATOMIC);
7157 
7158 	if (!op) {
7159 		/* do not reach for ATIO queue here.  This is best effort err
7160 		 * recovery at this point.
7161 		 */
7162 		qlt_response_pkt_all_vps(vha, rsp, pkt);
7163 		return;
7164 	}
7165 
7166 	memcpy(&op->atio, pkt, sizeof(*pkt));
7167 	op->vha = vha;
7168 	op->chip_reset = vha->hw->base_qpair->chip_reset;
7169 	op->rsp = rsp;
7170 	INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7171 	queue_work(qla_tgt_wq, &op->work);
7172 	return;
7173 }
7174 
7175 int
7176 qlt_mem_alloc(struct qla_hw_data *ha)
7177 {
7178 	if (!QLA_TGT_MODE_ENABLED())
7179 		return 0;
7180 
7181 	ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7182 				     sizeof(struct qla_tgt_vp_map),
7183 				     GFP_KERNEL);
7184 	if (!ha->tgt.tgt_vp_map)
7185 		return -ENOMEM;
7186 
7187 	ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7188 	    (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7189 	    &ha->tgt.atio_dma, GFP_KERNEL);
7190 	if (!ha->tgt.atio_ring) {
7191 		kfree(ha->tgt.tgt_vp_map);
7192 		return -ENOMEM;
7193 	}
7194 	return 0;
7195 }
7196 
7197 void
7198 qlt_mem_free(struct qla_hw_data *ha)
7199 {
7200 	if (!QLA_TGT_MODE_ENABLED())
7201 		return;
7202 
7203 	if (ha->tgt.atio_ring) {
7204 		dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7205 		    sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7206 		    ha->tgt.atio_dma);
7207 	}
7208 	ha->tgt.atio_ring = NULL;
7209 	ha->tgt.atio_dma = 0;
7210 	kfree(ha->tgt.tgt_vp_map);
7211 	ha->tgt.tgt_vp_map = NULL;
7212 }
7213 
7214 /* vport_slock to be held by the caller */
7215 void
7216 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7217 {
7218 	void *slot;
7219 	u32 key;
7220 	int rc;
7221 
7222 	if (!QLA_TGT_MODE_ENABLED())
7223 		return;
7224 
7225 	key = vha->d_id.b24;
7226 
7227 	switch (cmd) {
7228 	case SET_VP_IDX:
7229 		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7230 		break;
7231 	case SET_AL_PA:
7232 		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7233 		if (!slot) {
7234 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7235 			    "Save vha in host_map %p %06x\n", vha, key);
7236 			rc = btree_insert32(&vha->hw->tgt.host_map,
7237 				key, vha, GFP_ATOMIC);
7238 			if (rc)
7239 				ql_log(ql_log_info, vha, 0xd03e,
7240 				    "Unable to insert s_id into host_map: %06x\n",
7241 				    key);
7242 			return;
7243 		}
7244 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7245 		    "replace existing vha in host_map %p %06x\n", vha, key);
7246 		btree_update32(&vha->hw->tgt.host_map, key, vha);
7247 		break;
7248 	case RESET_VP_IDX:
7249 		vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7250 		break;
7251 	case RESET_AL_PA:
7252 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7253 		   "clear vha in host_map %p %06x\n", vha, key);
7254 		slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7255 		if (slot)
7256 			btree_remove32(&vha->hw->tgt.host_map, key);
7257 		vha->d_id.b24 = 0;
7258 		break;
7259 	}
7260 }
7261 
7262 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7263 {
7264 
7265 	if (!vha->d_id.b24) {
7266 		vha->d_id = id;
7267 		qlt_update_vp_map(vha, SET_AL_PA);
7268 	} else if (vha->d_id.b24 != id.b24) {
7269 		qlt_update_vp_map(vha, RESET_AL_PA);
7270 		vha->d_id = id;
7271 		qlt_update_vp_map(vha, SET_AL_PA);
7272 	}
7273 }
7274 
7275 static int __init qlt_parse_ini_mode(void)
7276 {
7277 	if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7278 		ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7279 	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7280 		ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7281 	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7282 		ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7283 	else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7284 		ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7285 	else
7286 		return false;
7287 
7288 	return true;
7289 }
7290 
7291 int __init qlt_init(void)
7292 {
7293 	int ret;
7294 
7295 	BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7296 	BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7297 
7298 	if (!qlt_parse_ini_mode()) {
7299 		ql_log(ql_log_fatal, NULL, 0xe06b,
7300 		    "qlt_parse_ini_mode() failed\n");
7301 		return -EINVAL;
7302 	}
7303 
7304 	if (!QLA_TGT_MODE_ENABLED())
7305 		return 0;
7306 
7307 	qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7308 	    sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7309 	    qla_tgt_mgmt_cmd), 0, NULL);
7310 	if (!qla_tgt_mgmt_cmd_cachep) {
7311 		ql_log(ql_log_fatal, NULL, 0xd04b,
7312 		    "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7313 		return -ENOMEM;
7314 	}
7315 
7316 	qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7317 	    sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7318 	    0, NULL);
7319 
7320 	if (!qla_tgt_plogi_cachep) {
7321 		ql_log(ql_log_fatal, NULL, 0xe06d,
7322 		    "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7323 		ret = -ENOMEM;
7324 		goto out_mgmt_cmd_cachep;
7325 	}
7326 
7327 	qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7328 	    mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7329 	if (!qla_tgt_mgmt_cmd_mempool) {
7330 		ql_log(ql_log_fatal, NULL, 0xe06e,
7331 		    "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7332 		ret = -ENOMEM;
7333 		goto out_plogi_cachep;
7334 	}
7335 
7336 	qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7337 	if (!qla_tgt_wq) {
7338 		ql_log(ql_log_fatal, NULL, 0xe06f,
7339 		    "alloc_workqueue for qla_tgt_wq failed\n");
7340 		ret = -ENOMEM;
7341 		goto out_cmd_mempool;
7342 	}
7343 	/*
7344 	 * Return 1 to signal that initiator-mode is being disabled
7345 	 */
7346 	return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7347 
7348 out_cmd_mempool:
7349 	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7350 out_plogi_cachep:
7351 	kmem_cache_destroy(qla_tgt_plogi_cachep);
7352 out_mgmt_cmd_cachep:
7353 	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7354 	return ret;
7355 }
7356 
7357 void qlt_exit(void)
7358 {
7359 	if (!QLA_TGT_MODE_ENABLED())
7360 		return;
7361 
7362 	destroy_workqueue(qla_tgt_wq);
7363 	mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7364 	kmem_cache_destroy(qla_tgt_plogi_cachep);
7365 	kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7366 }
7367