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qla2xxx: Fix scsi_host leak on qlt_lport_register callback failure
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / qla2xxx / qla_target.c
CommitLineData
2d70c103
NB		 1/*
2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
3 *
4 * based on qla2x00t.c code:
5 *
6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
7 * Copyright (C) 2004 - 2005 Leonid Stoljar
8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
9 * Copyright (C) 2006 - 2010 ID7 Ltd.
10 *
11 * Forward port and refactoring to modern qla2xxx and target/configfs
12 *
4c76251e 13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
2d70c103
NB		 14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation, version 2
18 * of the License.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 */
25
26#include <linux/module.h>
27#include <linux/init.h>
28#include <linux/types.h>
2d70c103
NB		 29#include <linux/blkdev.h>
30#include <linux/interrupt.h>
31#include <linux/pci.h>
32#include <linux/delay.h>
33#include <linux/list.h>
34#include <linux/workqueue.h>
35#include <asm/unaligned.h>
36#include <scsi/scsi.h>
37#include <scsi/scsi_host.h>
38#include <scsi/scsi_tcq.h>
39#include <target/target_core_base.h>
40#include <target/target_core_fabric.h>
41
42#include "qla_def.h"
43#include "qla_target.h"
44
45static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
46module_param(qlini_mode, charp, S_IRUGO);
47MODULE_PARM_DESC(qlini_mode,
48 "Determines when initiator mode will be enabled. Possible values: "
49 "\"exclusive\" - initiator mode will be enabled on load, "
50 "disabled on enabling target mode and then on disabling target mode "
51 "enabled back; "
52 "\"disabled\" - initiator mode will never be enabled; "
53 "\"enabled\" (default) - initiator mode will always stay enabled.");
54
aa230bc5 55int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
2d70c103
NB		 56
57/*
58 * From scsi/fc/fc_fcp.h
59 */
60enum fcp_resp_rsp_codes {
61 FCP_TMF_CMPL = 0,
62 FCP_DATA_LEN_INVALID = 1,
63 FCP_CMND_FIELDS_INVALID = 2,
64 FCP_DATA_PARAM_MISMATCH = 3,
65 FCP_TMF_REJECTED = 4,
66 FCP_TMF_FAILED = 5,
67 FCP_TMF_INVALID_LUN = 9,
68};
69
70/*
71 * fc_pri_ta from scsi/fc/fc_fcp.h
72 */
73#define FCP_PTA_SIMPLE 0 /* simple task attribute */
74#define FCP_PTA_HEADQ 1 /* head of queue task attribute */
75#define FCP_PTA_ORDERED 2 /* ordered task attribute */
6efb3c0a 76#define FCP_PTA_ACA 4 /* auto. contingent allegiance */
2d70c103
NB		 77#define FCP_PTA_MASK 7 /* mask for task attribute field */
78#define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */
79#define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */
80
81/*
82 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
83 * must be called under HW lock and could unlock/lock it inside.
84 * It isn't an issue, since in the current implementation on the time when
85 * those functions are called:
86 *
87 * - Either context is IRQ and only IRQ handler can modify HW data,
88 * including rings related fields,
89 *
90 * - Or access to target mode variables from struct qla_tgt doesn't
91 * cross those functions boundaries, except tgt_stop, which
92 * additionally protected by irq_cmd_count.
93 */
94/* Predefs for callbacks handed to qla2xxx LLD */
95static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
96 struct atio_from_isp *pkt);
97static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
98static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
99 int fn, void *iocb, int flags);
100static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
101 *cmd, struct atio_from_isp *atio, int ha_locked);
102static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
103 struct qla_tgt_srr_imm *imm, int ha_lock);
104/*
105 * Global Variables
106 */
107static struct kmem_cache *qla_tgt_cmd_cachep;
108static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
109static mempool_t *qla_tgt_mgmt_cmd_mempool;
110static struct workqueue_struct *qla_tgt_wq;
111static DEFINE_MUTEX(qla_tgt_mutex);
112static LIST_HEAD(qla_tgt_glist);
113
114/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
115static struct qla_tgt_sess *qlt_find_sess_by_port_name(
116 struct qla_tgt *tgt,
117 const uint8_t *port_name)
118{
119 struct qla_tgt_sess *sess;
120
121 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
122 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
123 return sess;
124 }
125
126 return NULL;
127}
128
129/* Might release hw lock, then reaquire!! */
130static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
131{
132 /* Send marker if required */
133 if (unlikely(vha->marker_needed != 0)) {
134 int rc = qla2x00_issue_marker(vha, vha_locked);
135 if (rc != QLA_SUCCESS) {
136 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
137 "qla_target(%d): issue_marker() failed\n",
138 vha->vp_idx);
139 }
140 return rc;
141 }
142 return QLA_SUCCESS;
143}
144
145static inline
146struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
147 uint8_t *d_id)
148{
149 struct qla_hw_data *ha = vha->hw;
150 uint8_t vp_idx;
151
152 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
153 return NULL;
154
155 if (vha->d_id.b.al_pa == d_id[2])
156 return vha;
157
158 BUG_ON(ha->tgt.tgt_vp_map == NULL);
159 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
160 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
161 return ha->tgt.tgt_vp_map[vp_idx].vha;
162
163 return NULL;
164}
165
166static inline
167struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
168 uint16_t vp_idx)
169{
170 struct qla_hw_data *ha = vha->hw;
171
172 if (vha->vp_idx == vp_idx)
173 return vha;
174
175 BUG_ON(ha->tgt.tgt_vp_map == NULL);
176 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
177 return ha->tgt.tgt_vp_map[vp_idx].vha;
178
179 return NULL;
180}
181
182void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
183 struct atio_from_isp *atio)
184{
185 switch (atio->u.raw.entry_type) {
186 case ATIO_TYPE7:
187 {
188 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
189 atio->u.isp24.fcp_hdr.d_id);
190 if (unlikely(NULL == host)) {
191 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
192 "qla_target(%d): Received ATIO_TYPE7 "
193 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
194 atio->u.isp24.fcp_hdr.d_id[0],
195 atio->u.isp24.fcp_hdr.d_id[1],
196 atio->u.isp24.fcp_hdr.d_id[2]);
197 break;
198 }
199 qlt_24xx_atio_pkt(host, atio);
200 break;
201 }
202
203 case IMMED_NOTIFY_TYPE:
204 {
205 struct scsi_qla_host *host = vha;
206 struct imm_ntfy_from_isp *entry =
207 (struct imm_ntfy_from_isp *)atio;
208
209 if ((entry->u.isp24.vp_index != 0xFF) &&
210 (entry->u.isp24.nport_handle != 0xFFFF)) {
211 host = qlt_find_host_by_vp_idx(vha,
212 entry->u.isp24.vp_index);
213 if (unlikely(!host)) {
214 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
215 "qla_target(%d): Received "
216 "ATIO (IMMED_NOTIFY_TYPE) "
217 "with unknown vp_index %d\n",
218 vha->vp_idx, entry->u.isp24.vp_index);
219 break;
220 }
221 }
222 qlt_24xx_atio_pkt(host, atio);
223 break;
224 }
225
226 default:
227 ql_dbg(ql_dbg_tgt, vha, 0xe040,
228 "qla_target(%d): Received unknown ATIO atio "
229 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
230 break;
231 }
232
233 return;
234}
235
236void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
237{
238 switch (pkt->entry_type) {
239 case CTIO_TYPE7:
240 {
241 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
242 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
243 entry->vp_index);
244 if (unlikely(!host)) {
245 ql_dbg(ql_dbg_tgt, vha, 0xe041,
246 "qla_target(%d): Response pkt (CTIO_TYPE7) "
247 "received, with unknown vp_index %d\n",
248 vha->vp_idx, entry->vp_index);
249 break;
250 }
251 qlt_response_pkt(host, pkt);
252 break;
253 }
254
255 case IMMED_NOTIFY_TYPE:
256 {
257 struct scsi_qla_host *host = vha;
258 struct imm_ntfy_from_isp *entry =
259 (struct imm_ntfy_from_isp *)pkt;
260
261 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
262 if (unlikely(!host)) {
263 ql_dbg(ql_dbg_tgt, vha, 0xe042,
264 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
265 "received, with unknown vp_index %d\n",
266 vha->vp_idx, entry->u.isp24.vp_index);
267 break;
268 }
269 qlt_response_pkt(host, pkt);
270 break;
271 }
272
273 case NOTIFY_ACK_TYPE:
274 {
275 struct scsi_qla_host *host = vha;
276 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
277
278 if (0xFF != entry->u.isp24.vp_index) {
279 host = qlt_find_host_by_vp_idx(vha,
280 entry->u.isp24.vp_index);
281 if (unlikely(!host)) {
282 ql_dbg(ql_dbg_tgt, vha, 0xe043,
283 "qla_target(%d): Response "
284 "pkt (NOTIFY_ACK_TYPE) "
285 "received, with unknown "
286 "vp_index %d\n", vha->vp_idx,
287 entry->u.isp24.vp_index);
288 break;
289 }
290 }
291 qlt_response_pkt(host, pkt);
292 break;
293 }
294
295 case ABTS_RECV_24XX:
296 {
297 struct abts_recv_from_24xx *entry =
298 (struct abts_recv_from_24xx *)pkt;
299 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
300 entry->vp_index);
301 if (unlikely(!host)) {
302 ql_dbg(ql_dbg_tgt, vha, 0xe044,
303 "qla_target(%d): Response pkt "
304 "(ABTS_RECV_24XX) received, with unknown "
305 "vp_index %d\n", vha->vp_idx, entry->vp_index);
306 break;
307 }
308 qlt_response_pkt(host, pkt);
309 break;
310 }
311
312 case ABTS_RESP_24XX:
313 {
314 struct abts_resp_to_24xx *entry =
315 (struct abts_resp_to_24xx *)pkt;
316 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
317 entry->vp_index);
318 if (unlikely(!host)) {
319 ql_dbg(ql_dbg_tgt, vha, 0xe045,
320 "qla_target(%d): Response pkt "
321 "(ABTS_RECV_24XX) received, with unknown "
322 "vp_index %d\n", vha->vp_idx, entry->vp_index);
323 break;
324 }
325 qlt_response_pkt(host, pkt);
326 break;
327 }
328
329 default:
330 qlt_response_pkt(vha, pkt);
331 break;
332 }
333
334}
335
336static void qlt_free_session_done(struct work_struct *work)
337{
338 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
339 free_work);
340 struct qla_tgt *tgt = sess->tgt;
341 struct scsi_qla_host *vha = sess->vha;
342 struct qla_hw_data *ha = vha->hw;
343
344 BUG_ON(!tgt);
345 /*
346 * Release the target session for FC Nexus from fabric module code.
347 */
348 if (sess->se_sess != NULL)
349 ha->tgt.tgt_ops->free_session(sess);
350
351 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
352 "Unregistration of sess %p finished\n", sess);
353
354 kfree(sess);
355 /*
356 * We need to protect against race, when tgt is freed before or
357 * inside wake_up()
358 */
359 tgt->sess_count--;
360 if (tgt->sess_count == 0)
361 wake_up_all(&tgt->waitQ);
362}
363
364/* ha->hardware_lock supposed to be held on entry */
365void qlt_unreg_sess(struct qla_tgt_sess *sess)
366{
367 struct scsi_qla_host *vha = sess->vha;
368
369 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
370
371 list_del(&sess->sess_list_entry);
372 if (sess->deleted)
373 list_del(&sess->del_list_entry);
374
375 INIT_WORK(&sess->free_work, qlt_free_session_done);
376 schedule_work(&sess->free_work);
377}
378EXPORT_SYMBOL(qlt_unreg_sess);
379
380/* ha->hardware_lock supposed to be held on entry */
381static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
382{
383 struct qla_hw_data *ha = vha->hw;
384 struct qla_tgt_sess *sess = NULL;
385 uint32_t unpacked_lun, lun = 0;
386 uint16_t loop_id;
387 int res = 0;
388 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
389 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
390
391 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
392 if (loop_id == 0xFFFF) {
393#if 0 /* FIXME: Re-enable Global event handling.. */
394 /* Global event */
395 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
396 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
397 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
398 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
399 typeof(*sess), sess_list_entry);
400 switch (mcmd) {
401 case QLA_TGT_NEXUS_LOSS_SESS:
402 mcmd = QLA_TGT_NEXUS_LOSS;
403 break;
404 case QLA_TGT_ABORT_ALL_SESS:
405 mcmd = QLA_TGT_ABORT_ALL;
406 break;
407 case QLA_TGT_NEXUS_LOSS:
408 case QLA_TGT_ABORT_ALL:
409 break;
410 default:
411 ql_dbg(ql_dbg_tgt, vha, 0xe046,
412 "qla_target(%d): Not allowed "
413 "command %x in %s", vha->vp_idx,
414 mcmd, __func__);
415 sess = NULL;
416 break;
417 }
418 } else
419 sess = NULL;
420#endif
421 } else {
422 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
423 }
424
425 ql_dbg(ql_dbg_tgt, vha, 0xe000,
426 "Using sess for qla_tgt_reset: %p\n", sess);
427 if (!sess) {
428 res = -ESRCH;
429 return res;
430 }
431
432 ql_dbg(ql_dbg_tgt, vha, 0xe047,
7b833558
OK		 433 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
434 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
2d70c103
NB		 435 mcmd, loop_id);
436
437 lun = a->u.isp24.fcp_cmnd.lun;
438 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
439
440 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
441 iocb, QLA24XX_MGMT_SEND_NACK);
442}
443
444/* ha->hardware_lock supposed to be held on entry */
445static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
446 bool immediate)
447{
448 struct qla_tgt *tgt = sess->tgt;
449 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
450
451 if (sess->deleted)
452 return;
453
454 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
455 "Scheduling sess %p for deletion\n", sess);
456 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
457 sess->deleted = 1;
458
459 if (immediate)
460 dev_loss_tmo = 0;
461
462 sess->expires = jiffies + dev_loss_tmo * HZ;
463
464 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
7b833558 465 "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
2d70c103 466 "deletion in %u secs (expires: %lu) immed: %d\n",
7b833558
OK		 467 sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
468 sess->expires, immediate);
2d70c103
NB		 469
470 if (immediate)
471 schedule_delayed_work(&tgt->sess_del_work, 0);
472 else
473 schedule_delayed_work(&tgt->sess_del_work,
474 jiffies - sess->expires);
475}
476
477/* ha->hardware_lock supposed to be held on entry */
478static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
479{
480 struct qla_tgt_sess *sess;
481
482 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
483 qlt_schedule_sess_for_deletion(sess, true);
484
485 /* At this point tgt could be already dead */
486}
487
488static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
489 uint16_t *loop_id)
490{
491 struct qla_hw_data *ha = vha->hw;
492 dma_addr_t gid_list_dma;
493 struct gid_list_info *gid_list;
494 char *id_iter;
495 int res, rc, i;
496 uint16_t entries;
497
498 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
499 &gid_list_dma, GFP_KERNEL);
500 if (!gid_list) {
501 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
502 "qla_target(%d): DMA Alloc failed of %u\n",
503 vha->vp_idx, qla2x00_gid_list_size(ha));
504 return -ENOMEM;
505 }
506
507 /* Get list of logged in devices */
508 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
509 if (rc != QLA_SUCCESS) {
510 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
511 "qla_target(%d): get_id_list() failed: %x\n",
512 vha->vp_idx, rc);
513 res = -1;
514 goto out_free_id_list;
515 }
516
517 id_iter = (char *)gid_list;
518 res = -1;
519 for (i = 0; i < entries; i++) {
520 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
521 if ((gid->al_pa == s_id[2]) &&
522 (gid->area == s_id[1]) &&
523 (gid->domain == s_id[0])) {
524 *loop_id = le16_to_cpu(gid->loop_id);
525 res = 0;
526 break;
527 }
528 id_iter += ha->gid_list_info_size;
529 }
530
531out_free_id_list:
532 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
533 gid_list, gid_list_dma);
534 return res;
535}
536
2d70c103
NB		 537/* ha->hardware_lock supposed to be held on entry */
538static void qlt_undelete_sess(struct qla_tgt_sess *sess)
539{
540 BUG_ON(!sess->deleted);
541
542 list_del(&sess->del_list_entry);
543 sess->deleted = 0;
544}
545
546static void qlt_del_sess_work_fn(struct delayed_work *work)
547{
548 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
549 sess_del_work);
550 struct scsi_qla_host *vha = tgt->vha;
551 struct qla_hw_data *ha = vha->hw;
552 struct qla_tgt_sess *sess;
553 unsigned long flags;
554
555 spin_lock_irqsave(&ha->hardware_lock, flags);
556 while (!list_empty(&tgt->del_sess_list)) {
557 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
558 del_list_entry);
559 if (time_after_eq(jiffies, sess->expires)) {
2d70c103
NB		 560 qlt_undelete_sess(sess);
561
08234e3a
JE		 562 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
563 "Timeout: sess %p about to be deleted\n",
564 sess);
565 ha->tgt.tgt_ops->shutdown_sess(sess);
566 ha->tgt.tgt_ops->put_sess(sess);
2d70c103
NB		 567 } else {
568 schedule_delayed_work(&tgt->sess_del_work,
569 jiffies - sess->expires);
570 break;
571 }
572 }
573 spin_unlock_irqrestore(&ha->hardware_lock, flags);
574}
575
576/*
577 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
578 * Caller must put it.
579 */
580static struct qla_tgt_sess *qlt_create_sess(
581 struct scsi_qla_host *vha,
582 fc_port_t *fcport,
583 bool local)
584{
585 struct qla_hw_data *ha = vha->hw;
586 struct qla_tgt_sess *sess;
587 unsigned long flags;
588 unsigned char be_sid[3];
589
590 /* Check to avoid double sessions */
591 spin_lock_irqsave(&ha->hardware_lock, flags);
592 list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
593 sess_list_entry) {
594 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
595 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
596 "Double sess %p found (s_id %x:%x:%x, "
597 "loop_id %d), updating to d_id %x:%x:%x, "
598 "loop_id %d", sess, sess->s_id.b.domain,
599 sess->s_id.b.al_pa, sess->s_id.b.area,
600 sess->loop_id, fcport->d_id.b.domain,
601 fcport->d_id.b.al_pa, fcport->d_id.b.area,
602 fcport->loop_id);
603
604 if (sess->deleted)
605 qlt_undelete_sess(sess);
606
607 kref_get(&sess->se_sess->sess_kref);
c8292d1d
RD		 608 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
609 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
610
2d70c103
NB		 611 if (sess->local && !local)
612 sess->local = 0;
613 spin_unlock_irqrestore(&ha->hardware_lock, flags);
614
615 return sess;
616 }
617 }
618 spin_unlock_irqrestore(&ha->hardware_lock, flags);
619
620 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
621 if (!sess) {
622 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
7b833558
OK		 623 "qla_target(%u): session allocation failed, all commands "
624 "from port %8phC will be refused", vha->vp_idx,
625 fcport->port_name);
2d70c103
NB		 626
627 return NULL;
628 }
629 sess->tgt = ha->tgt.qla_tgt;
630 sess->vha = vha;
631 sess->s_id = fcport->d_id;
632 sess->loop_id = fcport->loop_id;
633 sess->local = local;
634
635 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
636 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
637 sess, ha->tgt.qla_tgt);
638
639 be_sid[0] = sess->s_id.b.domain;
640 be_sid[1] = sess->s_id.b.area;
641 be_sid[2] = sess->s_id.b.al_pa;
642 /*
643 * Determine if this fc_port->port_name is allowed to access
644 * target mode using explict NodeACLs+MappedLUNs, or using
645 * TPG demo mode. If this is successful a target mode FC nexus
646 * is created.
647 */
648 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
649 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
650 kfree(sess);
651 return NULL;
652 }
653 /*
654 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
655 * access across ->hardware_lock reaquire.
656 */
657 kref_get(&sess->se_sess->sess_kref);
658
c8292d1d 659 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
2d70c103
NB		 660 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
661 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
662
663 spin_lock_irqsave(&ha->hardware_lock, flags);
664 list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
665 ha->tgt.qla_tgt->sess_count++;
666 spin_unlock_irqrestore(&ha->hardware_lock, flags);
667
668 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
7b833558
OK		 669 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
670 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
671 vha->vp_idx, local ? "local " : "", fcport->port_name,
672 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
673 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
2d70c103
NB		 674
675 return sess;
676}
677
678/*
679 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
680 */
681void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
682{
683 struct qla_hw_data *ha = vha->hw;
684 struct qla_tgt *tgt = ha->tgt.qla_tgt;
685 struct qla_tgt_sess *sess;
686 unsigned long flags;
687
688 if (!vha->hw->tgt.tgt_ops)
689 return;
690
691 if (!tgt || (fcport->port_type != FCT_INITIATOR))
692 return;
693
694 spin_lock_irqsave(&ha->hardware_lock, flags);
695 if (tgt->tgt_stop) {
696 spin_unlock_irqrestore(&ha->hardware_lock, flags);
697 return;
698 }
699 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
700 if (!sess) {
701 spin_unlock_irqrestore(&ha->hardware_lock, flags);
702
703 mutex_lock(&ha->tgt.tgt_mutex);
704 sess = qlt_create_sess(vha, fcport, false);
705 mutex_unlock(&ha->tgt.tgt_mutex);
706
707 spin_lock_irqsave(&ha->hardware_lock, flags);
708 } else {
709 kref_get(&sess->se_sess->sess_kref);
710
711 if (sess->deleted) {
712 qlt_undelete_sess(sess);
713
714 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
7b833558
OK		 715 "qla_target(%u): %ssession for port %8phC "
716 "(loop ID %d) reappeared\n", vha->vp_idx,
717 sess->local ? "local " : "", sess->port_name,
2d70c103
NB		 718 sess->loop_id);
719
720 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
721 "Reappeared sess %p\n", sess);
722 }
c8292d1d
RD		 723 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
724 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
2d70c103
NB		 725 }
726
727 if (sess && sess->local) {
728 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
729 "qla_target(%u): local session for "
7b833558
OK		 730 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
731 fcport->port_name, sess->loop_id);
2d70c103
NB		 732 sess->local = 0;
733 }
2d70c103 734 ha->tgt.tgt_ops->put_sess(sess);
08234e3a 735 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 736}
737
738void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
739{
740 struct qla_hw_data *ha = vha->hw;
741 struct qla_tgt *tgt = ha->tgt.qla_tgt;
742 struct qla_tgt_sess *sess;
743 unsigned long flags;
744
745 if (!vha->hw->tgt.tgt_ops)
746 return;
747
748 if (!tgt || (fcport->port_type != FCT_INITIATOR))
749 return;
750
751 spin_lock_irqsave(&ha->hardware_lock, flags);
752 if (tgt->tgt_stop) {
753 spin_unlock_irqrestore(&ha->hardware_lock, flags);
754 return;
755 }
756 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
757 if (!sess) {
758 spin_unlock_irqrestore(&ha->hardware_lock, flags);
759 return;
760 }
761
762 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
763
764 sess->local = 1;
765 qlt_schedule_sess_for_deletion(sess, false);
766 spin_unlock_irqrestore(&ha->hardware_lock, flags);
767}
768
769static inline int test_tgt_sess_count(struct qla_tgt *tgt)
770{
771 struct qla_hw_data *ha = tgt->ha;
772 unsigned long flags;
773 int res;
774 /*
775 * We need to protect against race, when tgt is freed before or
776 * inside wake_up()
777 */
778 spin_lock_irqsave(&ha->hardware_lock, flags);
779 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
780 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
781 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
782 res = (tgt->sess_count == 0);
783 spin_unlock_irqrestore(&ha->hardware_lock, flags);
784
785 return res;
786}
787
788/* Called by tcm_qla2xxx configfs code */
789void qlt_stop_phase1(struct qla_tgt *tgt)
790{
791 struct scsi_qla_host *vha = tgt->vha;
792 struct qla_hw_data *ha = tgt->ha;
793 unsigned long flags;
794
795 if (tgt->tgt_stop || tgt->tgt_stopped) {
796 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
797 "Already in tgt->tgt_stop or tgt_stopped state\n");
798 dump_stack();
799 return;
800 }
801
802 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
803 vha->host_no, vha);
804 /*
805 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
806 * Lock is needed, because we still can get an incoming packet.
807 */
808 mutex_lock(&ha->tgt.tgt_mutex);
809 spin_lock_irqsave(&ha->hardware_lock, flags);
810 tgt->tgt_stop = 1;
811 qlt_clear_tgt_db(tgt, true);
812 spin_unlock_irqrestore(&ha->hardware_lock, flags);
813 mutex_unlock(&ha->tgt.tgt_mutex);
814
43829731 815 flush_delayed_work(&tgt->sess_del_work);
2d70c103
NB		 816
817 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
818 "Waiting for sess works (tgt %p)", tgt);
819 spin_lock_irqsave(&tgt->sess_work_lock, flags);
820 while (!list_empty(&tgt->sess_works_list)) {
821 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
822 flush_scheduled_work();
823 spin_lock_irqsave(&tgt->sess_work_lock, flags);
824 }
825 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
826
827 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
828 "Waiting for tgt %p: list_empty(sess_list)=%d "
829 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
830 tgt->sess_count);
831
832 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
833
834 /* Big hammer */
835 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
836 qlt_disable_vha(vha);
837
838 /* Wait for sessions to clear out (just in case) */
839 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
840}
841EXPORT_SYMBOL(qlt_stop_phase1);
842
843/* Called by tcm_qla2xxx configfs code */
844void qlt_stop_phase2(struct qla_tgt *tgt)
845{
846 struct qla_hw_data *ha = tgt->ha;
847 unsigned long flags;
848
849 if (tgt->tgt_stopped) {
850 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
851 "Already in tgt->tgt_stopped state\n");
852 dump_stack();
853 return;
854 }
855
856 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
857 "Waiting for %d IRQ commands to complete (tgt %p)",
858 tgt->irq_cmd_count, tgt);
859
860 mutex_lock(&ha->tgt.tgt_mutex);
861 spin_lock_irqsave(&ha->hardware_lock, flags);
862 while (tgt->irq_cmd_count != 0) {
863 spin_unlock_irqrestore(&ha->hardware_lock, flags);
864 udelay(2);
865 spin_lock_irqsave(&ha->hardware_lock, flags);
866 }
867 tgt->tgt_stop = 0;
868 tgt->tgt_stopped = 1;
869 spin_unlock_irqrestore(&ha->hardware_lock, flags);
870 mutex_unlock(&ha->tgt.tgt_mutex);
871
872 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
873 tgt);
874}
875EXPORT_SYMBOL(qlt_stop_phase2);
876
877/* Called from qlt_remove_target() -> qla2x00_remove_one() */
fa492630 878static void qlt_release(struct qla_tgt *tgt)
2d70c103
NB		 879{
880 struct qla_hw_data *ha = tgt->ha;
881
882 if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
883 qlt_stop_phase2(tgt);
884
885 ha->tgt.qla_tgt = NULL;
886
887 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
888 "Release of tgt %p finished\n", tgt);
889
890 kfree(tgt);
891}
892
893/* ha->hardware_lock supposed to be held on entry */
894static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
895 const void *param, unsigned int param_size)
896{
897 struct qla_tgt_sess_work_param *prm;
898 unsigned long flags;
899
900 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
901 if (!prm) {
902 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
903 "qla_target(%d): Unable to create session "
904 "work, command will be refused", 0);
905 return -ENOMEM;
906 }
907
908 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
909 "Scheduling work (type %d, prm %p)"
910 " to find session for param %p (size %d, tgt %p)\n",
911 type, prm, param, param_size, tgt);
912
913 prm->type = type;
914 memcpy(&prm->tm_iocb, param, param_size);
915
916 spin_lock_irqsave(&tgt->sess_work_lock, flags);
917 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
918 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
919
920 schedule_work(&tgt->sess_work);
921
922 return 0;
923}
924
925/*
926 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
927 */
928static void qlt_send_notify_ack(struct scsi_qla_host *vha,
929 struct imm_ntfy_from_isp *ntfy,
930 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
931 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
932{
933 struct qla_hw_data *ha = vha->hw;
934 request_t *pkt;
935 struct nack_to_isp *nack;
936
937 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
938
939 /* Send marker if required */
940 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
941 return;
942
943 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
944 if (!pkt) {
945 ql_dbg(ql_dbg_tgt, vha, 0xe049,
946 "qla_target(%d): %s failed: unable to allocate "
947 "request packet\n", vha->vp_idx, __func__);
948 return;
949 }
950
951 if (ha->tgt.qla_tgt != NULL)
952 ha->tgt.qla_tgt->notify_ack_expected++;
953
954 pkt->entry_type = NOTIFY_ACK_TYPE;
955 pkt->entry_count = 1;
956
957 nack = (struct nack_to_isp *)pkt;
958 nack->ox_id = ntfy->ox_id;
959
960 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
961 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
962 nack->u.isp24.flags = ntfy->u.isp24.flags &
963 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
964 }
965 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
966 nack->u.isp24.status = ntfy->u.isp24.status;
967 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
aa230bc5 968 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
2d70c103
NB		 969 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
970 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
971 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
972 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
973 nack->u.isp24.srr_reject_code = srr_reject_code;
974 nack->u.isp24.srr_reject_code_expl = srr_explan;
975 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
976
977 ql_dbg(ql_dbg_tgt, vha, 0xe005,
978 "qla_target(%d): Sending 24xx Notify Ack %d\n",
979 vha->vp_idx, nack->u.isp24.status);
980
981 qla2x00_start_iocbs(vha, vha->req);
982}
983
984/*
985 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
986 */
987static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
988 struct abts_recv_from_24xx *abts, uint32_t status,
989 bool ids_reversed)
990{
991 struct qla_hw_data *ha = vha->hw;
992 struct abts_resp_to_24xx *resp;
993 uint32_t f_ctl;
994 uint8_t *p;
995
996 ql_dbg(ql_dbg_tgt, vha, 0xe006,
997 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
998 ha, abts, status);
999
1000 /* Send marker if required */
1001 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1002 return;
1003
1004 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1005 if (!resp) {
1006 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1007 "qla_target(%d): %s failed: unable to allocate "
1008 "request packet", vha->vp_idx, __func__);
1009 return;
1010 }
1011
1012 resp->entry_type = ABTS_RESP_24XX;
1013 resp->entry_count = 1;
1014 resp->nport_handle = abts->nport_handle;
1015 resp->vp_index = vha->vp_idx;
1016 resp->sof_type = abts->sof_type;
1017 resp->exchange_address = abts->exchange_address;
1018 resp->fcp_hdr_le = abts->fcp_hdr_le;
1019 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1020 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1021 F_CTL_SEQ_INITIATIVE);
1022 p = (uint8_t *)&f_ctl;
1023 resp->fcp_hdr_le.f_ctl[0] = *p++;
1024 resp->fcp_hdr_le.f_ctl[1] = *p++;
1025 resp->fcp_hdr_le.f_ctl[2] = *p;
1026 if (ids_reversed) {
1027 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1028 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1029 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1030 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1031 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1032 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1033 } else {
1034 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1035 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1036 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1037 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1038 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1039 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1040 }
1041 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1042 if (status == FCP_TMF_CMPL) {
1043 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1044 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1045 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1046 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1047 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1048 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1049 } else {
1050 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1051 resp->payload.ba_rjt.reason_code =
1052 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1053 /* Other bytes are zero */
1054 }
1055
1056 ha->tgt.qla_tgt->abts_resp_expected++;
1057
1058 qla2x00_start_iocbs(vha, vha->req);
1059}
1060
1061/*
1062 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1063 */
1064static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1065 struct abts_resp_from_24xx_fw *entry)
1066{
1067 struct ctio7_to_24xx *ctio;
1068
1069 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1070 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1071 /* Send marker if required */
1072 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1073 return;
1074
1075 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1076 if (ctio == NULL) {
1077 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1078 "qla_target(%d): %s failed: unable to allocate "
1079 "request packet\n", vha->vp_idx, __func__);
1080 return;
1081 }
1082
1083 /*
1084 * We've got on entrance firmware's response on by us generated
1085 * ABTS response. So, in it ID fields are reversed.
1086 */
1087
1088 ctio->entry_type = CTIO_TYPE7;
1089 ctio->entry_count = 1;
1090 ctio->nport_handle = entry->nport_handle;
1091 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1092 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1093 ctio->vp_index = vha->vp_idx;
1094 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1095 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1096 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1097 ctio->exchange_addr = entry->exchange_addr_to_abort;
1098 ctio->u.status1.flags =
1099 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1100 CTIO7_FLAGS_TERMINATE);
1101 ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1102
1103 qla2x00_start_iocbs(vha, vha->req);
1104
1105 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1106 FCP_TMF_CMPL, true);
1107}
1108
1109/* ha->hardware_lock supposed to be held on entry */
1110static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1111 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1112{
1113 struct qla_hw_data *ha = vha->hw;
06e97b48 1114 struct se_session *se_sess = sess->se_sess;
2d70c103 1115 struct qla_tgt_mgmt_cmd *mcmd;
06e97b48
SH		 1116 struct se_cmd *se_cmd;
1117 u32 lun = 0;
2d70c103 1118 int rc;
06e97b48
SH		 1119 bool found_lun = false;
1120
1121 spin_lock(&se_sess->sess_cmd_lock);
1122 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1123 struct qla_tgt_cmd *cmd =
1124 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1125 if (cmd->tag == abts->exchange_addr_to_abort) {
1126 lun = cmd->unpacked_lun;
1127 found_lun = true;
1128 break;
1129 }
1130 }
1131 spin_unlock(&se_sess->sess_cmd_lock);
1132
1133 if (!found_lun)
1134 return -ENOENT;
2d70c103
NB		 1135
1136 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1137 "qla_target(%d): task abort (tag=%d)\n",
1138 vha->vp_idx, abts->exchange_addr_to_abort);
1139
1140 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1141 if (mcmd == NULL) {
1142 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1143 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1144 vha->vp_idx, __func__);
1145 return -ENOMEM;
1146 }
1147 memset(mcmd, 0, sizeof(*mcmd));
1148
1149 mcmd->sess = sess;
1150 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1151
06e97b48 1152 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
2d70c103
NB		 1153 abts->exchange_addr_to_abort);
1154 if (rc != 0) {
1155 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1156 "qla_target(%d): tgt_ops->handle_tmr()"
1157 " failed: %d", vha->vp_idx, rc);
1158 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1159 return -EFAULT;
1160 }
1161
1162 return 0;
1163}
1164
1165/*
1166 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1167 */
1168static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1169 struct abts_recv_from_24xx *abts)
1170{
1171 struct qla_hw_data *ha = vha->hw;
1172 struct qla_tgt_sess *sess;
1173 uint32_t tag = abts->exchange_addr_to_abort;
1174 uint8_t s_id[3];
1175 int rc;
1176
1177 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1178 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1179 "qla_target(%d): ABTS: Abort Sequence not "
1180 "supported\n", vha->vp_idx);
1181 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1182 return;
1183 }
1184
1185 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1186 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1187 "qla_target(%d): ABTS: Unknown Exchange "
1188 "Address received\n", vha->vp_idx);
1189 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1190 return;
1191 }
1192
1193 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1194 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1195 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1196 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1197 le32_to_cpu(abts->fcp_hdr_le.parameter));
1198
1199 s_id[0] = abts->fcp_hdr_le.s_id[2];
1200 s_id[1] = abts->fcp_hdr_le.s_id[1];
1201 s_id[2] = abts->fcp_hdr_le.s_id[0];
1202
1203 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1204 if (!sess) {
1205 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1206 "qla_target(%d): task abort for non-existant session\n",
1207 vha->vp_idx);
1208 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1209 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1210 if (rc != 0) {
1211 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1212 false);
1213 }
1214 return;
1215 }
1216
1217 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1218 if (rc != 0) {
1219 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1220 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1221 vha->vp_idx, rc);
1222 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1223 return;
1224 }
1225}
1226
1227/*
1228 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1229 */
1230static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1231 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1232{
1233 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1234 struct ctio7_to_24xx *ctio;
1235
1236 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1237 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1238 ha, atio, resp_code);
1239
1240 /* Send marker if required */
1241 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1242 return;
1243
1244 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1245 if (ctio == NULL) {
1246 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1247 "qla_target(%d): %s failed: unable to allocate "
1248 "request packet\n", ha->vp_idx, __func__);
1249 return;
1250 }
1251
1252 ctio->entry_type = CTIO_TYPE7;
1253 ctio->entry_count = 1;
1254 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1255 ctio->nport_handle = mcmd->sess->loop_id;
1256 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1257 ctio->vp_index = ha->vp_idx;
1258 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1259 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1260 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1261 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1262 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1263 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1264 CTIO7_FLAGS_SEND_STATUS);
1265 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1266 ctio->u.status1.scsi_status =
1267 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1268 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
e4b11b89 1269 ctio->u.status1.sense_data[0] = resp_code;
2d70c103
NB		 1270
1271 qla2x00_start_iocbs(ha, ha->req);
1272}
1273
1274void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1275{
1276 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1277}
1278EXPORT_SYMBOL(qlt_free_mcmd);
1279
1280/* callback from target fabric module code */
1281void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1282{
1283 struct scsi_qla_host *vha = mcmd->sess->vha;
1284 struct qla_hw_data *ha = vha->hw;
1285 unsigned long flags;
1286
1287 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1288 "TM response mcmd (%p) status %#x state %#x",
1289 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1290
1291 spin_lock_irqsave(&ha->hardware_lock, flags);
1292 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1293 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1294 0, 0, 0, 0, 0, 0);
1295 else {
1296 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1297 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1298 mcmd->fc_tm_rsp, false);
1299 else
1300 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1301 mcmd->fc_tm_rsp);
1302 }
1303 /*
1304 * Make the callback for ->free_mcmd() to queue_work() and invoke
1305 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1306 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1307 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1308 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1309 * qlt_xmit_tm_rsp() returns here..
1310 */
1311 ha->tgt.tgt_ops->free_mcmd(mcmd);
1312 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1313}
1314EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1315
1316/* No locks */
1317static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1318{
1319 struct qla_tgt_cmd *cmd = prm->cmd;
1320
1321 BUG_ON(cmd->sg_cnt == 0);
1322
1323 prm->sg = (struct scatterlist *)cmd->sg;
1324 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1325 cmd->sg_cnt, cmd->dma_data_direction);
1326 if (unlikely(prm->seg_cnt == 0))
1327 goto out_err;
1328
1329 prm->cmd->sg_mapped = 1;
1330
1331 /*
1332 * If greater than four sg entries then we need to allocate
1333 * the continuation entries
1334 */
1335 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1336 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1337 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1338
1339 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1340 prm->seg_cnt, prm->req_cnt);
1341 return 0;
1342
1343out_err:
1344 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1345 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1346 0, prm->cmd->sg_cnt);
1347 return -1;
1348}
1349
1350static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1351 struct qla_tgt_cmd *cmd)
1352{
1353 struct qla_hw_data *ha = vha->hw;
1354
1355 BUG_ON(!cmd->sg_mapped);
1356 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1357 cmd->sg_mapped = 0;
1358}
1359
1360static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1361 uint32_t req_cnt)
1362{
1363 struct qla_hw_data *ha = vha->hw;
1364 device_reg_t __iomem *reg = ha->iobase;
1365 uint32_t cnt;
1366
1367 if (vha->req->cnt < (req_cnt + 2)) {
1368 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1369
1370 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1371 "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1372 "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1373 vha->req->ring_index, vha->req->cnt, req_cnt);
1374 if (vha->req->ring_index < cnt)
1375 vha->req->cnt = cnt - vha->req->ring_index;
1376 else
1377 vha->req->cnt = vha->req->length -
1378 (vha->req->ring_index - cnt);
1379 }
1380
1381 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1382 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1383 "qla_target(%d): There is no room in the "
1384 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1385 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1386 vha->req->cnt, req_cnt);
1387 return -EAGAIN;
1388 }
1389 vha->req->cnt -= req_cnt;
1390
1391 return 0;
1392}
1393
1394/*
1395 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1396 */
1397static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1398{
1399 /* Adjust ring index. */
1400 vha->req->ring_index++;
1401 if (vha->req->ring_index == vha->req->length) {
1402 vha->req->ring_index = 0;
1403 vha->req->ring_ptr = vha->req->ring;
1404 } else {
1405 vha->req->ring_ptr++;
1406 }
1407 return (cont_entry_t *)vha->req->ring_ptr;
1408}
1409
1410/* ha->hardware_lock supposed to be held on entry */
1411static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1412{
1413 struct qla_hw_data *ha = vha->hw;
1414 uint32_t h;
1415
1416 h = ha->tgt.current_handle;
1417 /* always increment cmd handle */
1418 do {
1419 ++h;
8d93f550 1420 if (h > DEFAULT_OUTSTANDING_COMMANDS)
2d70c103
NB		 1421 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1422 if (h == ha->tgt.current_handle) {
1423 ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1424 "qla_target(%d): Ran out of "
1425 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1426 h = QLA_TGT_NULL_HANDLE;
1427 break;
1428 }
1429 } while ((h == QLA_TGT_NULL_HANDLE) ||
1430 (h == QLA_TGT_SKIP_HANDLE) ||
1431 (ha->tgt.cmds[h-1] != NULL));
1432
1433 if (h != QLA_TGT_NULL_HANDLE)
1434 ha->tgt.current_handle = h;
1435
1436 return h;
1437}
1438
1439/* ha->hardware_lock supposed to be held on entry */
1440static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1441 struct scsi_qla_host *vha)
1442{
1443 uint32_t h;
1444 struct ctio7_to_24xx *pkt;
1445 struct qla_hw_data *ha = vha->hw;
1446 struct atio_from_isp *atio = &prm->cmd->atio;
1447
1448 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1449 prm->pkt = pkt;
1450 memset(pkt, 0, sizeof(*pkt));
1451
1452 pkt->entry_type = CTIO_TYPE7;
1453 pkt->entry_count = (uint8_t)prm->req_cnt;
1454 pkt->vp_index = vha->vp_idx;
1455
1456 h = qlt_make_handle(vha);
1457 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1458 /*
1459 * CTIO type 7 from the firmware doesn't provide a way to
1460 * know the initiator's LOOP ID, hence we can't find
1461 * the session and, so, the command.
1462 */
1463 return -EAGAIN;
1464 } else
1465 ha->tgt.cmds[h-1] = prm->cmd;
1466
1467 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1468 pkt->nport_handle = prm->cmd->loop_id;
1469 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1470 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1471 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1472 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1473 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1474 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1475 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1476 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1477
1478 ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1479 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1480 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1481 le16_to_cpu(pkt->u.status0.ox_id));
1482 return 0;
1483}
1484
1485/*
1486 * ha->hardware_lock supposed to be held on entry. We have already made sure
1487 * that there is sufficient amount of request entries to not drop it.
1488 */
1489static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1490 struct scsi_qla_host *vha)
1491{
1492 int cnt;
1493 uint32_t *dword_ptr;
1494 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1495
1496 /* Build continuation packets */
1497 while (prm->seg_cnt > 0) {
1498 cont_a64_entry_t *cont_pkt64 =
1499 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1500
1501 /*
1502 * Make sure that from cont_pkt64 none of
1503 * 64-bit specific fields used for 32-bit
1504 * addressing. Cast to (cont_entry_t *) for
1505 * that.
1506 */
1507
1508 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1509
1510 cont_pkt64->entry_count = 1;
1511 cont_pkt64->sys_define = 0;
1512
1513 if (enable_64bit_addressing) {
1514 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1515 dword_ptr =
1516 (uint32_t *)&cont_pkt64->dseg_0_address;
1517 } else {
1518 cont_pkt64->entry_type = CONTINUE_TYPE;
1519 dword_ptr =
1520 (uint32_t *)&((cont_entry_t *)
1521 cont_pkt64)->dseg_0_address;
1522 }
1523
1524 /* Load continuation entry data segments */
1525 for (cnt = 0;
1526 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1527 cnt++, prm->seg_cnt--) {
1528 *dword_ptr++ =
1529 cpu_to_le32(pci_dma_lo32
1530 (sg_dma_address(prm->sg)));
1531 if (enable_64bit_addressing) {
1532 *dword_ptr++ =
1533 cpu_to_le32(pci_dma_hi32
1534 (sg_dma_address
1535 (prm->sg)));
1536 }
1537 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1538
1539 ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1540 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1541 (long long unsigned int)
1542 pci_dma_hi32(sg_dma_address(prm->sg)),
1543 (long long unsigned int)
1544 pci_dma_lo32(sg_dma_address(prm->sg)),
1545 (int)sg_dma_len(prm->sg));
1546
1547 prm->sg = sg_next(prm->sg);
1548 }
1549 }
1550}
1551
1552/*
1553 * ha->hardware_lock supposed to be held on entry. We have already made sure
1554 * that there is sufficient amount of request entries to not drop it.
1555 */
1556static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1557 struct scsi_qla_host *vha)
1558{
1559 int cnt;
1560 uint32_t *dword_ptr;
1561 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1562 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1563
1564 ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1565 "iocb->scsi_status=%x, iocb->flags=%x\n",
1566 le16_to_cpu(pkt24->u.status0.scsi_status),
1567 le16_to_cpu(pkt24->u.status0.flags));
1568
1569 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1570
1571 /* Setup packet address segment pointer */
1572 dword_ptr = pkt24->u.status0.dseg_0_address;
1573
1574 /* Set total data segment count */
1575 if (prm->seg_cnt)
1576 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1577
1578 if (prm->seg_cnt == 0) {
1579 /* No data transfer */
1580 *dword_ptr++ = 0;
1581 *dword_ptr = 0;
1582 return;
1583 }
1584
1585 /* If scatter gather */
1586 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1587
1588 /* Load command entry data segments */
1589 for (cnt = 0;
1590 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1591 cnt++, prm->seg_cnt--) {
1592 *dword_ptr++ =
1593 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1594 if (enable_64bit_addressing) {
1595 *dword_ptr++ =
1596 cpu_to_le32(pci_dma_hi32(
1597 sg_dma_address(prm->sg)));
1598 }
1599 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1600
1601 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1602 "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1603 (long long unsigned int)pci_dma_hi32(sg_dma_address(
1604 prm->sg)),
1605 (long long unsigned int)pci_dma_lo32(sg_dma_address(
1606 prm->sg)),
1607 (int)sg_dma_len(prm->sg));
1608
1609 prm->sg = sg_next(prm->sg);
1610 }
1611
1612 qlt_load_cont_data_segments(prm, vha);
1613}
1614
1615static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1616{
1617 return cmd->bufflen > 0;
1618}
1619
1620/*
1621 * Called without ha->hardware_lock held
1622 */
1623static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1624 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1625 uint32_t *full_req_cnt)
1626{
1627 struct qla_tgt *tgt = cmd->tgt;
1628 struct scsi_qla_host *vha = tgt->vha;
1629 struct qla_hw_data *ha = vha->hw;
1630 struct se_cmd *se_cmd = &cmd->se_cmd;
1631
1632 if (unlikely(cmd->aborted)) {
1633 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1634 "qla_target(%d): terminating exchange "
1635 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1636 se_cmd, cmd->tag);
1637
1638 cmd->state = QLA_TGT_STATE_ABORTED;
1639
1640 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1641
1642 /* !! At this point cmd could be already freed !! */
1643 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1644 }
1645
1646 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1647 vha->vp_idx, cmd->tag);
1648
1649 prm->cmd = cmd;
1650 prm->tgt = tgt;
1651 prm->rq_result = scsi_status;
1652 prm->sense_buffer = &cmd->sense_buffer[0];
1653 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1654 prm->sg = NULL;
1655 prm->seg_cnt = -1;
1656 prm->req_cnt = 1;
1657 prm->add_status_pkt = 0;
1658
1659 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1660 prm->rq_result, xmit_type);
1661
1662 /* Send marker if required */
1663 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1664 return -EFAULT;
1665
1666 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1667
1668 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1669 if (qlt_pci_map_calc_cnt(prm) != 0)
1670 return -EAGAIN;
1671 }
1672
1673 *full_req_cnt = prm->req_cnt;
1674
1675 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1676 prm->residual = se_cmd->residual_count;
1677 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1678 "Residual underflow: %d (tag %d, "
1679 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1680 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1681 cmd->bufflen, prm->rq_result);
1682 prm->rq_result |= SS_RESIDUAL_UNDER;
1683 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1684 prm->residual = se_cmd->residual_count;
1685 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1686 "Residual overflow: %d (tag %d, "
1687 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1688 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1689 cmd->bufflen, prm->rq_result);
1690 prm->rq_result |= SS_RESIDUAL_OVER;
1691 }
1692
1693 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1694 /*
1695 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1696 * ignored in *xmit_response() below
1697 */
1698 if (qlt_has_data(cmd)) {
1699 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1700 (IS_FWI2_CAPABLE(ha) &&
1701 (prm->rq_result != 0))) {
1702 prm->add_status_pkt = 1;
1703 (*full_req_cnt)++;
1704 }
1705 }
1706 }
1707
1708 ql_dbg(ql_dbg_tgt, vha, 0xe016,
1709 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1710 prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1711
1712 return 0;
1713}
1714
1715static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1716 struct qla_tgt_cmd *cmd, int sending_sense)
1717{
1718 if (ha->tgt.enable_class_2)
1719 return 0;
1720
1721 if (sending_sense)
1722 return cmd->conf_compl_supported;
1723 else
1724 return ha->tgt.enable_explicit_conf &&
1725 cmd->conf_compl_supported;
1726}
1727
1728#ifdef CONFIG_QLA_TGT_DEBUG_SRR
1729/*
1730 * Original taken from the XFS code
1731 */
1732static unsigned long qlt_srr_random(void)
1733{
1734 static int Inited;
1735 static unsigned long RandomValue;
1736 static DEFINE_SPINLOCK(lock);
1737 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1738 register long rv;
1739 register long lo;
1740 register long hi;
1741 unsigned long flags;
1742
1743 spin_lock_irqsave(&lock, flags);
1744 if (!Inited) {
1745 RandomValue = jiffies;
1746 Inited = 1;
1747 }
1748 rv = RandomValue;
1749 hi = rv / 127773;
1750 lo = rv % 127773;
1751 rv = 16807 * lo - 2836 * hi;
1752 if (rv <= 0)
1753 rv += 2147483647;
1754 RandomValue = rv;
1755 spin_unlock_irqrestore(&lock, flags);
1756 return rv;
1757}
1758
1759static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1760{
1761#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1762 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1763 == 50) {
1764 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1765 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1766 "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1767 }
1768#endif
1769 /*
1770 * It's currently not possible to simulate SRRs for FCP_WRITE without
1771 * a physical link layer failure, so don't even try here..
1772 */
1773 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1774 return;
1775
1776 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1777 ((qlt_srr_random() % 100) == 20)) {
1778 int i, leave = 0;
1779 unsigned int tot_len = 0;
1780
1781 while (leave == 0)
1782 leave = qlt_srr_random() % cmd->sg_cnt;
1783
1784 for (i = 0; i < leave; i++)
1785 tot_len += cmd->sg[i].length;
1786
1787 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1788 "Cutting cmd %p (tag %d) buffer"
1789 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1790 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1791 cmd->bufflen, cmd->sg_cnt);
1792
1793 cmd->bufflen = tot_len;
1794 cmd->sg_cnt = leave;
1795 }
1796
1797 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1798 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1799
1800 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1801 "Cutting cmd %p (tag %d) buffer head "
1802 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1803 cmd->bufflen);
1804 if (offset == 0)
1805 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1806 else if (qlt_set_data_offset(cmd, offset)) {
1807 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1808 "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1809 }
1810 }
1811}
1812#else
1813static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1814{}
1815#endif
1816
1817static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1818 struct qla_tgt_prm *prm)
1819{
1820 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1821 (uint32_t)sizeof(ctio->u.status1.sense_data));
1822 ctio->u.status0.flags |=
1823 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1824 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1825 ctio->u.status0.flags |= __constant_cpu_to_le16(
1826 CTIO7_FLAGS_EXPLICIT_CONFORM |
1827 CTIO7_FLAGS_CONFORM_REQ);
1828 }
1829 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1830 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1831 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1832 int i;
1833
1834 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1835 if (prm->cmd->se_cmd.scsi_status != 0) {
1836 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1837 "Skipping EXPLICIT_CONFORM and "
1838 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1839 "non GOOD status\n");
1840 goto skip_explict_conf;
1841 }
1842 ctio->u.status1.flags |= __constant_cpu_to_le16(
1843 CTIO7_FLAGS_EXPLICIT_CONFORM |
1844 CTIO7_FLAGS_CONFORM_REQ);
1845 }
1846skip_explict_conf:
1847 ctio->u.status1.flags &=
1848 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1849 ctio->u.status1.flags |=
1850 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1851 ctio->u.status1.scsi_status |=
1852 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1853 ctio->u.status1.sense_length =
1854 cpu_to_le16(prm->sense_buffer_len);
1855 for (i = 0; i < prm->sense_buffer_len/4; i++)
1856 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1857 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1858#if 0
1859 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1860 static int q;
1861 if (q < 10) {
1862 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1863 "qla_target(%d): %d bytes of sense "
1864 "lost", prm->tgt->ha->vp_idx,
1865 prm->sense_buffer_len % 4);
1866 q++;
1867 }
1868 }
1869#endif
1870 } else {
1871 ctio->u.status1.flags &=
1872 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1873 ctio->u.status1.flags |=
1874 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1875 ctio->u.status1.sense_length = 0;
1876 memset(ctio->u.status1.sense_data, 0,
1877 sizeof(ctio->u.status1.sense_data));
1878 }
1879
1880 /* Sense with len > 24, is it possible ??? */
1881}
1882
1883/*
1884 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
1885 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
1886 */
1887int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
1888 uint8_t scsi_status)
1889{
1890 struct scsi_qla_host *vha = cmd->vha;
1891 struct qla_hw_data *ha = vha->hw;
1892 struct ctio7_to_24xx *pkt;
1893 struct qla_tgt_prm prm;
1894 uint32_t full_req_cnt = 0;
1895 unsigned long flags = 0;
1896 int res;
1897
1898 memset(&prm, 0, sizeof(prm));
1899 qlt_check_srr_debug(cmd, &xmit_type);
1900
1901 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
1902 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
1903 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1904 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
1905
1906 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
1907 &full_req_cnt);
1908 if (unlikely(res != 0)) {
1909 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
1910 return 0;
1911
1912 return res;
1913 }
1914
1915 spin_lock_irqsave(&ha->hardware_lock, flags);
1916
1917 /* Does F/W have an IOCBs for this request */
1918 res = qlt_check_reserve_free_req(vha, full_req_cnt);
1919 if (unlikely(res))
1920 goto out_unmap_unlock;
1921
1922 res = qlt_24xx_build_ctio_pkt(&prm, vha);
1923 if (unlikely(res != 0))
1924 goto out_unmap_unlock;
1925
1926
1927 pkt = (struct ctio7_to_24xx *)prm.pkt;
1928
1929 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
1930 pkt->u.status0.flags |=
1931 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
1932 CTIO7_FLAGS_STATUS_MODE_0);
1933
1934 qlt_load_data_segments(&prm, vha);
1935
1936 if (prm.add_status_pkt == 0) {
1937 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1938 pkt->u.status0.scsi_status =
1939 cpu_to_le16(prm.rq_result);
1940 pkt->u.status0.residual =
1941 cpu_to_le32(prm.residual);
1942 pkt->u.status0.flags |= __constant_cpu_to_le16(
1943 CTIO7_FLAGS_SEND_STATUS);
1944 if (qlt_need_explicit_conf(ha, cmd, 0)) {
1945 pkt->u.status0.flags |=
1946 __constant_cpu_to_le16(
1947 CTIO7_FLAGS_EXPLICIT_CONFORM |
1948 CTIO7_FLAGS_CONFORM_REQ);
1949 }
1950 }
1951
1952 } else {
1953 /*
1954 * We have already made sure that there is sufficient
1955 * amount of request entries to not drop HW lock in
1956 * req_pkt().
1957 */
1958 struct ctio7_to_24xx *ctio =
1959 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
1960
1961 ql_dbg(ql_dbg_tgt, vha, 0xe019,
1962 "Building additional status packet\n");
1963
1964 memcpy(ctio, pkt, sizeof(*ctio));
1965 ctio->entry_count = 1;
1966 ctio->dseg_count = 0;
1967 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
1968 CTIO7_FLAGS_DATA_IN);
1969
1970 /* Real finish is ctio_m1's finish */
1971 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
1972 pkt->u.status0.flags |= __constant_cpu_to_le16(
1973 CTIO7_FLAGS_DONT_RET_CTIO);
1974 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
1975 &prm);
1976 pr_debug("Status CTIO7: %p\n", ctio);
1977 }
1978 } else
1979 qlt_24xx_init_ctio_to_isp(pkt, &prm);
1980
1981
1982 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
1983
1984 ql_dbg(ql_dbg_tgt, vha, 0xe01a,
1985 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
1986 pkt, scsi_status);
1987
1988 qla2x00_start_iocbs(vha, vha->req);
1989 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1990
1991 return 0;
1992
1993out_unmap_unlock:
1994 if (cmd->sg_mapped)
1995 qlt_unmap_sg(vha, cmd);
1996 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1997
1998 return res;
1999}
2000EXPORT_SYMBOL(qlt_xmit_response);
2001
2002int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2003{
2004 struct ctio7_to_24xx *pkt;
2005 struct scsi_qla_host *vha = cmd->vha;
2006 struct qla_hw_data *ha = vha->hw;
2007 struct qla_tgt *tgt = cmd->tgt;
2008 struct qla_tgt_prm prm;
2009 unsigned long flags;
2010 int res = 0;
2011
2012 memset(&prm, 0, sizeof(prm));
2013 prm.cmd = cmd;
2014 prm.tgt = tgt;
2015 prm.sg = NULL;
2016 prm.req_cnt = 1;
2017
2018 /* Send marker if required */
2019 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2020 return -EIO;
2021
2022 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2023 (int)vha->vp_idx);
2024
2025 /* Calculate number of entries and segments required */
2026 if (qlt_pci_map_calc_cnt(&prm) != 0)
2027 return -EAGAIN;
2028
2029 spin_lock_irqsave(&ha->hardware_lock, flags);
2030
2031 /* Does F/W have an IOCBs for this request */
2032 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2033 if (res != 0)
2034 goto out_unlock_free_unmap;
2035
2036 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2037 if (unlikely(res != 0))
2038 goto out_unlock_free_unmap;
2039 pkt = (struct ctio7_to_24xx *)prm.pkt;
2040 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2041 CTIO7_FLAGS_STATUS_MODE_0);
2042 qlt_load_data_segments(&prm, vha);
2043
2044 cmd->state = QLA_TGT_STATE_NEED_DATA;
2045
2046 qla2x00_start_iocbs(vha, vha->req);
2047 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2048
2049 return res;
2050
2051out_unlock_free_unmap:
2052 if (cmd->sg_mapped)
2053 qlt_unmap_sg(vha, cmd);
2054 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2055
2056 return res;
2057}
2058EXPORT_SYMBOL(qlt_rdy_to_xfer);
2059
2060/* If hardware_lock held on entry, might drop it, then reaquire */
2061/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2062static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2063 struct qla_tgt_cmd *cmd,
2064 struct atio_from_isp *atio)
2065{
2066 struct ctio7_to_24xx *ctio24;
2067 struct qla_hw_data *ha = vha->hw;
2068 request_t *pkt;
2069 int ret = 0;
2070
2071 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2072
2073 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2074 if (pkt == NULL) {
2075 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2076 "qla_target(%d): %s failed: unable to allocate "
2077 "request packet\n", vha->vp_idx, __func__);
2078 return -ENOMEM;
2079 }
2080
2081 if (cmd != NULL) {
2082 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2083 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2084 "qla_target(%d): Terminating cmd %p with "
2085 "incorrect state %d\n", vha->vp_idx, cmd,
2086 cmd->state);
2087 } else
2088 ret = 1;
2089 }
2090
2091 pkt->entry_count = 1;
2092 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2093
2094 ctio24 = (struct ctio7_to_24xx *)pkt;
2095 ctio24->entry_type = CTIO_TYPE7;
2096 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2097 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2098 ctio24->vp_index = vha->vp_idx;
2099 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2100 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2101 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2102 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2103 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2104 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2105 CTIO7_FLAGS_TERMINATE);
2106 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2107
2108 /* Most likely, it isn't needed */
2109 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2110 &atio->u.isp24.fcp_cmnd.add_cdb[
2111 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2112 if (ctio24->u.status1.residual != 0)
2113 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2114
2115 qla2x00_start_iocbs(vha, vha->req);
2116 return ret;
2117}
2118
2119static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2120 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2121{
2122 unsigned long flags;
2123 int rc;
2124
2125 if (qlt_issue_marker(vha, ha_locked) < 0)
2126 return;
2127
2128 if (ha_locked) {
2129 rc = __qlt_send_term_exchange(vha, cmd, atio);
2130 goto done;
2131 }
2132 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2133 rc = __qlt_send_term_exchange(vha, cmd, atio);
2134 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2135done:
2136 if (rc == 1) {
2137 if (!ha_locked && !in_interrupt())
2138 msleep(250); /* just in case */
2139
2140 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2141 }
2142}
2143
2144void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2145{
2146 BUG_ON(cmd->sg_mapped);
2147
2148 if (unlikely(cmd->free_sg))
2149 kfree(cmd->sg);
2150 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2151}
2152EXPORT_SYMBOL(qlt_free_cmd);
2153
2154/* ha->hardware_lock supposed to be held on entry */
2155static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2156 struct qla_tgt_cmd *cmd, void *ctio)
2157{
2158 struct qla_tgt_srr_ctio *sc;
2159 struct qla_hw_data *ha = vha->hw;
2160 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2161 struct qla_tgt_srr_imm *imm;
2162
2163 tgt->ctio_srr_id++;
2164
2165 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2166 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2167
2168 if (!ctio) {
2169 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2170 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2171 vha->vp_idx);
2172 return -EINVAL;
2173 }
2174
2175 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2176 if (sc != NULL) {
2177 sc->cmd = cmd;
2178 /* IRQ is already OFF */
2179 spin_lock(&tgt->srr_lock);
2180 sc->srr_id = tgt->ctio_srr_id;
2181 list_add_tail(&sc->srr_list_entry,
2182 &tgt->srr_ctio_list);
2183 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2184 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2185 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2186 int found = 0;
2187 list_for_each_entry(imm, &tgt->srr_imm_list,
2188 srr_list_entry) {
2189 if (imm->srr_id == sc->srr_id) {
2190 found = 1;
2191 break;
2192 }
2193 }
2194 if (found) {
2195 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2196 "Scheduling srr work\n");
2197 schedule_work(&tgt->srr_work);
2198 } else {
2199 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2200 "qla_target(%d): imm_srr_id "
2201 "== ctio_srr_id (%d), but there is no "
2202 "corresponding SRR IMM, deleting CTIO "
2203 "SRR %p\n", vha->vp_idx,
2204 tgt->ctio_srr_id, sc);
2205 list_del(&sc->srr_list_entry);
2206 spin_unlock(&tgt->srr_lock);
2207
2208 kfree(sc);
2209 return -EINVAL;
2210 }
2211 }
2212 spin_unlock(&tgt->srr_lock);
2213 } else {
2214 struct qla_tgt_srr_imm *ti;
2215
2216 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2217 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2218 vha->vp_idx);
2219 spin_lock(&tgt->srr_lock);
2220 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2221 srr_list_entry) {
2222 if (imm->srr_id == tgt->ctio_srr_id) {
2223 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2224 "IMM SRR %p deleted (id %d)\n",
2225 imm, imm->srr_id);
2226 list_del(&imm->srr_list_entry);
2227 qlt_reject_free_srr_imm(vha, imm, 1);
2228 }
2229 }
2230 spin_unlock(&tgt->srr_lock);
2231
2232 return -ENOMEM;
2233 }
2234
2235 return 0;
2236}
2237
2238/*
2239 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2240 */
2241static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2242 struct qla_tgt_cmd *cmd, uint32_t status)
2243{
2244 int term = 0;
2245
2246 if (ctio != NULL) {
2247 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2248 term = !(c->flags &
2249 __constant_cpu_to_le16(OF_TERM_EXCH));
2250 } else
2251 term = 1;
2252
2253 if (term)
2254 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2255
2256 return term;
2257}
2258
2259/* ha->hardware_lock supposed to be held on entry */
2260static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2261 uint32_t handle)
2262{
2263 struct qla_hw_data *ha = vha->hw;
2264
2265 handle--;
2266 if (ha->tgt.cmds[handle] != NULL) {
2267 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2268 ha->tgt.cmds[handle] = NULL;
2269 return cmd;
2270 } else
2271 return NULL;
2272}
2273
2274/* ha->hardware_lock supposed to be held on entry */
2275static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2276 uint32_t handle, void *ctio)
2277{
2278 struct qla_tgt_cmd *cmd = NULL;
2279
2280 /* Clear out internal marks */
2281 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2282 CTIO_INTERMEDIATE_HANDLE_MARK);
2283
2284 if (handle != QLA_TGT_NULL_HANDLE) {
2285 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2286 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2287 "SKIP_HANDLE CTIO\n");
2288 return NULL;
2289 }
2290 /* handle-1 is actually used */
8d93f550 2291 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2d70c103
NB		 2292 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2293 "qla_target(%d): Wrong handle %x received\n",
2294 vha->vp_idx, handle);
2295 return NULL;
2296 }
2297 cmd = qlt_get_cmd(vha, handle);
2298 if (unlikely(cmd == NULL)) {
2299 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2300 "qla_target(%d): Suspicious: unable to "
2301 "find the command with handle %x\n", vha->vp_idx,
2302 handle);
2303 return NULL;
2304 }
2305 } else if (ctio != NULL) {
2306 /* We can't get loop ID from CTIO7 */
2307 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2308 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2309 "support NULL handles\n", vha->vp_idx);
2310 return NULL;
2311 }
2312
2313 return cmd;
2314}
2315
2316/*
2317 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2318 */
2319static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2320 uint32_t status, void *ctio)
2321{
2322 struct qla_hw_data *ha = vha->hw;
2323 struct se_cmd *se_cmd;
2324 struct target_core_fabric_ops *tfo;
2325 struct qla_tgt_cmd *cmd;
2326
2327 ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2328 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2329 vha->vp_idx, ctio, status, handle);
2330
2331 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2332 /* That could happen only in case of an error/reset/abort */
2333 if (status != CTIO_SUCCESS) {
2334 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2335 "Intermediate CTIO received"
2336 " (status %x)\n", status);
2337 }
2338 return;
2339 }
2340
2341 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
092e1dc3 2342 if (cmd == NULL)
2d70c103 2343 return;
092e1dc3 2344
2d70c103
NB		 2345 se_cmd = &cmd->se_cmd;
2346 tfo = se_cmd->se_tfo;
2347
2348 if (cmd->sg_mapped)
2349 qlt_unmap_sg(vha, cmd);
2350
2351 if (unlikely(status != CTIO_SUCCESS)) {
2352 switch (status & 0xFFFF) {
2353 case CTIO_LIP_RESET:
2354 case CTIO_TARGET_RESET:
2355 case CTIO_ABORTED:
2356 case CTIO_TIMEOUT:
2357 case CTIO_INVALID_RX_ID:
2358 /* They are OK */
2359 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2360 "qla_target(%d): CTIO with "
2361 "status %#x received, state %x, se_cmd %p, "
2362 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2363 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2364 status, cmd->state, se_cmd);
2365 break;
2366
2367 case CTIO_PORT_LOGGED_OUT:
2368 case CTIO_PORT_UNAVAILABLE:
2369 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2370 "qla_target(%d): CTIO with PORT LOGGED "
2371 "OUT (29) or PORT UNAVAILABLE (28) status %x "
2372 "received (state %x, se_cmd %p)\n", vha->vp_idx,
2373 status, cmd->state, se_cmd);
2374 break;
2375
2376 case CTIO_SRR_RECEIVED:
2377 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2378 "qla_target(%d): CTIO with SRR_RECEIVED"
2379 " status %x received (state %x, se_cmd %p)\n",
2380 vha->vp_idx, status, cmd->state, se_cmd);
2381 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2382 break;
2383 else
2384 return;
2385
2386 default:
2387 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2388 "qla_target(%d): CTIO with error status "
2389 "0x%x received (state %x, se_cmd %p\n",
2390 vha->vp_idx, status, cmd->state, se_cmd);
2391 break;
2392 }
2393
2394 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2395 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2396 return;
2397 }
2398
2399 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2400 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2401 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2402 int rx_status = 0;
2403
2404 cmd->state = QLA_TGT_STATE_DATA_IN;
2405
2406 if (unlikely(status != CTIO_SUCCESS))
2407 rx_status = -EIO;
2408 else
2409 cmd->write_data_transferred = 1;
2410
2411 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2412 "Data received, context %x, rx_status %d\n",
2413 0x0, rx_status);
2414
2415 ha->tgt.tgt_ops->handle_data(cmd);
2416 return;
2417 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2418 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2419 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2420 } else {
2421 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2422 "qla_target(%d): A command in state (%d) should "
2423 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2424 }
2425
2426 if (unlikely(status != CTIO_SUCCESS)) {
2427 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2428 dump_stack();
2429 }
2430
2431 ha->tgt.tgt_ops->free_cmd(cmd);
2432}
2433
2d70c103
NB		 2434static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2435 uint8_t task_codes)
2436{
2437 int fcp_task_attr;
2438
2439 switch (task_codes) {
2440 case ATIO_SIMPLE_QUEUE:
2441 fcp_task_attr = MSG_SIMPLE_TAG;
2442 break;
2443 case ATIO_HEAD_OF_QUEUE:
2444 fcp_task_attr = MSG_HEAD_TAG;
2445 break;
2446 case ATIO_ORDERED_QUEUE:
2447 fcp_task_attr = MSG_ORDERED_TAG;
2448 break;
2449 case ATIO_ACA_QUEUE:
2450 fcp_task_attr = MSG_ACA_TAG;
2451 break;
2452 case ATIO_UNTAGGED:
2453 fcp_task_attr = MSG_SIMPLE_TAG;
2454 break;
2455 default:
2456 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2457 "qla_target: unknown task code %x, use ORDERED instead\n",
2458 task_codes);
2459 fcp_task_attr = MSG_ORDERED_TAG;
2460 break;
2461 }
2462
2463 return fcp_task_attr;
2464}
2465
2466static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2467 uint8_t *);
2468/*
2469 * Process context for I/O path into tcm_qla2xxx code
2470 */
2471static void qlt_do_work(struct work_struct *work)
2472{
2473 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2474 scsi_qla_host_t *vha = cmd->vha;
2475 struct qla_hw_data *ha = vha->hw;
2476 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2477 struct qla_tgt_sess *sess = NULL;
2478 struct atio_from_isp *atio = &cmd->atio;
2479 unsigned char *cdb;
2480 unsigned long flags;
2481 uint32_t data_length;
2482 int ret, fcp_task_attr, data_dir, bidi = 0;
2483
2484 if (tgt->tgt_stop)
2485 goto out_term;
2486
2487 spin_lock_irqsave(&ha->hardware_lock, flags);
2488 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2489 atio->u.isp24.fcp_hdr.s_id);
e1013f14
RD		 2490 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2491 if (sess)
2492 kref_get(&sess->se_sess->sess_kref);
2d70c103
NB		 2493 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2494
2495 if (unlikely(!sess)) {
2496 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2497
2498 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2499 "qla_target(%d): Unable to find wwn login"
2500 " (s_id %x:%x:%x), trying to create it manually\n",
2501 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2502
2503 if (atio->u.raw.entry_count > 1) {
2504 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2505 "Dropping multy entry cmd %p\n", cmd);
2506 goto out_term;
2507 }
2508
2509 mutex_lock(&ha->tgt.tgt_mutex);
2510 sess = qlt_make_local_sess(vha, s_id);
2511 /* sess has an extra creation ref. */
2512 mutex_unlock(&ha->tgt.tgt_mutex);
2513
2514 if (!sess)
2515 goto out_term;
2516 }
2517
2518 cmd->sess = sess;
2519 cmd->loop_id = sess->loop_id;
2520 cmd->conf_compl_supported = sess->conf_compl_supported;
2521
2522 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2523 cmd->tag = atio->u.isp24.exchange_addr;
2524 cmd->unpacked_lun = scsilun_to_int(
2525 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2526
2527 if (atio->u.isp24.fcp_cmnd.rddata &&
2528 atio->u.isp24.fcp_cmnd.wrdata) {
2529 bidi = 1;
2530 data_dir = DMA_TO_DEVICE;
2531 } else if (atio->u.isp24.fcp_cmnd.rddata)
2532 data_dir = DMA_FROM_DEVICE;
2533 else if (atio->u.isp24.fcp_cmnd.wrdata)
2534 data_dir = DMA_TO_DEVICE;
2535 else
2536 data_dir = DMA_NONE;
2537
2538 fcp_task_attr = qlt_get_fcp_task_attr(vha,
2539 atio->u.isp24.fcp_cmnd.task_attr);
2540 data_length = be32_to_cpu(get_unaligned((uint32_t *)
2541 &atio->u.isp24.fcp_cmnd.add_cdb[
2542 atio->u.isp24.fcp_cmnd.add_cdb_len]));
2543
2544 ql_dbg(ql_dbg_tgt, vha, 0xe022,
2545 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2546 cmd, cmd->unpacked_lun, cmd->tag);
2547
2548 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2549 fcp_task_attr, data_dir, bidi);
2550 if (ret != 0)
2551 goto out_term;
2552 /*
2553 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2554 */
08234e3a 2555 spin_lock_irqsave(&ha->hardware_lock, flags);
2d70c103 2556 ha->tgt.tgt_ops->put_sess(sess);
08234e3a 2557 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 2558 return;
2559
2560out_term:
2561 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2562 /*
fae9eaf8
RD		 2563 * cmd has not sent to target yet, so pass NULL as the second
2564 * argument to qlt_send_term_exchange() and free the memory here.
2d70c103
NB		 2565 */
2566 spin_lock_irqsave(&ha->hardware_lock, flags);
2567 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
fae9eaf8 2568 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2d70c103
NB		 2569 if (sess)
2570 ha->tgt.tgt_ops->put_sess(sess);
08234e3a 2571 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 2572}
2573
2574/* ha->hardware_lock supposed to be held on entry */
2575static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2576 struct atio_from_isp *atio)
2577{
2578 struct qla_hw_data *ha = vha->hw;
2579 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2580 struct qla_tgt_cmd *cmd;
2581
2582 if (unlikely(tgt->tgt_stop)) {
2583 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2584 "New command while device %p is shutting down\n", tgt);
2585 return -EFAULT;
2586 }
2587
2588 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2589 if (!cmd) {
2590 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2591 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2592 return -ENOMEM;
2593 }
2594
2595 INIT_LIST_HEAD(&cmd->cmd_list);
2596
2597 memcpy(&cmd->atio, atio, sizeof(*atio));
2598 cmd->state = QLA_TGT_STATE_NEW;
2599 cmd->tgt = ha->tgt.qla_tgt;
2600 cmd->vha = vha;
2601
2602 INIT_WORK(&cmd->work, qlt_do_work);
2603 queue_work(qla_tgt_wq, &cmd->work);
2604 return 0;
2605
2606}
2607
2608/* ha->hardware_lock supposed to be held on entry */
2609static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2610 int fn, void *iocb, int flags)
2611{
2612 struct scsi_qla_host *vha = sess->vha;
2613 struct qla_hw_data *ha = vha->hw;
2614 struct qla_tgt_mgmt_cmd *mcmd;
2615 int res;
2616 uint8_t tmr_func;
2617
2618 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2619 if (!mcmd) {
2620 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2621 "qla_target(%d): Allocation of management "
2622 "command failed, some commands and their data could "
2623 "leak\n", vha->vp_idx);
2624 return -ENOMEM;
2625 }
2626 memset(mcmd, 0, sizeof(*mcmd));
2627 mcmd->sess = sess;
2628
2629 if (iocb) {
2630 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2631 sizeof(mcmd->orig_iocb.imm_ntfy));
2632 }
2633 mcmd->tmr_func = fn;
2634 mcmd->flags = flags;
2635
2636 switch (fn) {
2637 case QLA_TGT_CLEAR_ACA:
2638 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2639 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2640 tmr_func = TMR_CLEAR_ACA;
2641 break;
2642
2643 case QLA_TGT_TARGET_RESET:
2644 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2645 "qla_target(%d): TARGET_RESET received\n",
2646 sess->vha->vp_idx);
2647 tmr_func = TMR_TARGET_WARM_RESET;
2648 break;
2649
2650 case QLA_TGT_LUN_RESET:
2651 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2652 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2653 tmr_func = TMR_LUN_RESET;
2654 break;
2655
2656 case QLA_TGT_CLEAR_TS:
2657 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2658 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2659 tmr_func = TMR_CLEAR_TASK_SET;
2660 break;
2661
2662 case QLA_TGT_ABORT_TS:
2663 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2664 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2665 tmr_func = TMR_ABORT_TASK_SET;
2666 break;
2667#if 0
2668 case QLA_TGT_ABORT_ALL:
2669 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2670 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2671 sess->vha->vp_idx);
2672 tmr_func = 0;
2673 break;
2674
2675 case QLA_TGT_ABORT_ALL_SESS:
2676 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2677 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2678 sess->vha->vp_idx);
2679 tmr_func = 0;
2680 break;
2681
2682 case QLA_TGT_NEXUS_LOSS_SESS:
2683 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2684 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2685 sess->vha->vp_idx);
2686 tmr_func = 0;
2687 break;
2688
2689 case QLA_TGT_NEXUS_LOSS:
2690 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2691 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2692 tmr_func = 0;
2693 break;
2694#endif
2695 default:
2696 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2697 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2698 sess->vha->vp_idx, fn);
2699 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2700 return -ENOSYS;
2701 }
2702
2703 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2704 if (res != 0) {
2705 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2706 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2707 sess->vha->vp_idx, res);
2708 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2709 return -EFAULT;
2710 }
2711
2712 return 0;
2713}
2714
2715/* ha->hardware_lock supposed to be held on entry */
2716static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2717{
2718 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2719 struct qla_hw_data *ha = vha->hw;
2720 struct qla_tgt *tgt;
2721 struct qla_tgt_sess *sess;
2722 uint32_t lun, unpacked_lun;
2723 int lun_size, fn;
2724
2725 tgt = ha->tgt.qla_tgt;
2726
2727 lun = a->u.isp24.fcp_cmnd.lun;
2728 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2729 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2730 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2731 a->u.isp24.fcp_hdr.s_id);
2732 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2733
2734 if (!sess) {
2735 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2736 "qla_target(%d): task mgmt fn 0x%x for "
2737 "non-existant session\n", vha->vp_idx, fn);
2738 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2739 sizeof(struct atio_from_isp));
2740 }
2741
2742 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2743}
2744
2745/* ha->hardware_lock supposed to be held on entry */
2746static int __qlt_abort_task(struct scsi_qla_host *vha,
2747 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2748{
2749 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2750 struct qla_hw_data *ha = vha->hw;
2751 struct qla_tgt_mgmt_cmd *mcmd;
2752 uint32_t lun, unpacked_lun;
2753 int rc;
2754
2755 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2756 if (mcmd == NULL) {
2757 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2758 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2759 vha->vp_idx, __func__);
2760 return -ENOMEM;
2761 }
2762 memset(mcmd, 0, sizeof(*mcmd));
2763
2764 mcmd->sess = sess;
2765 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2766 sizeof(mcmd->orig_iocb.imm_ntfy));
2767
2768 lun = a->u.isp24.fcp_cmnd.lun;
2769 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2770
2771 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2772 le16_to_cpu(iocb->u.isp2x.seq_id));
2773 if (rc != 0) {
2774 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2775 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2776 vha->vp_idx, rc);
2777 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2778 return -EFAULT;
2779 }
2780
2781 return 0;
2782}
2783
2784/* ha->hardware_lock supposed to be held on entry */
2785static int qlt_abort_task(struct scsi_qla_host *vha,
2786 struct imm_ntfy_from_isp *iocb)
2787{
2788 struct qla_hw_data *ha = vha->hw;
2789 struct qla_tgt_sess *sess;
2790 int loop_id;
2791
2792 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2793
2794 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2795 if (sess == NULL) {
2796 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2797 "qla_target(%d): task abort for unexisting "
2798 "session\n", vha->vp_idx);
2799 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2800 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2801 }
2802
2803 return __qlt_abort_task(vha, iocb, sess);
2804}
2805
2806/*
2807 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2808 */
2809static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2810 struct imm_ntfy_from_isp *iocb)
2811{
2812 struct qla_hw_data *ha = vha->hw;
2813 int res = 0;
2814
2815 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
7b833558
OK		 2816 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
2817 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
2d70c103
NB		 2818
2819 switch (iocb->u.isp24.status_subcode) {
2820 case ELS_PLOGI:
2821 case ELS_FLOGI:
2822 case ELS_PRLI:
2823 case ELS_LOGO:
2824 case ELS_PRLO:
2825 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2826 break;
2827 case ELS_PDISC:
2828 case ELS_ADISC:
2829 {
2830 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2831 if (tgt->link_reinit_iocb_pending) {
2832 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2833 0, 0, 0, 0, 0, 0);
2834 tgt->link_reinit_iocb_pending = 0;
2835 }
2836 res = 1; /* send notify ack */
2837 break;
2838 }
2839
2840 default:
2841 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2842 "qla_target(%d): Unsupported ELS command %x "
2843 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2844 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2845 break;
2846 }
2847
2848 return res;
2849}
2850
2851static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
2852{
2853 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
2854 size_t first_offset = 0, rem_offset = offset, tmp = 0;
2855 int i, sg_srr_cnt, bufflen = 0;
2856
2857 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
2858 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
2859 "cmd->sg_cnt: %u, direction: %d\n",
2860 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2861
2862 /*
2863 * FIXME: Reject non zero SRR relative offset until we can test
2864 * this code properly.
2865 */
2866 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
2867 return -1;
2868
2869 if (!cmd->sg || !cmd->sg_cnt) {
2870 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
2871 "Missing cmd->sg or zero cmd->sg_cnt in"
2872 " qla_tgt_set_data_offset\n");
2873 return -EINVAL;
2874 }
2875 /*
2876 * Walk the current cmd->sg list until we locate the new sg_srr_start
2877 */
2878 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
2879 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
2880 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
2881 i, sg, sg_page(sg), sg->length, sg->offset);
2882
2883 if ((sg->length + tmp) > offset) {
2884 first_offset = rem_offset;
2885 sg_srr_start = sg;
2886 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
2887 "Found matching sg[%d], using %p as sg_srr_start, "
2888 "and using first_offset: %zu\n", i, sg,
2889 first_offset);
2890 break;
2891 }
2892 tmp += sg->length;
2893 rem_offset -= sg->length;
2894 }
2895
2896 if (!sg_srr_start) {
2897 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
2898 "Unable to locate sg_srr_start for offset: %u\n", offset);
2899 return -EINVAL;
2900 }
2901 sg_srr_cnt = (cmd->sg_cnt - i);
2902
2903 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
2904 if (!sg_srr) {
2905 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
2906 "Unable to allocate sgp\n");
2907 return -ENOMEM;
2908 }
2909 sg_init_table(sg_srr, sg_srr_cnt);
2910 sgp = &sg_srr[0];
2911 /*
2912 * Walk the remaining list for sg_srr_start, mapping to the newly
2913 * allocated sg_srr taking first_offset into account.
2914 */
2915 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
2916 if (first_offset) {
2917 sg_set_page(sgp, sg_page(sg),
2918 (sg->length - first_offset), first_offset);
2919 first_offset = 0;
2920 } else {
2921 sg_set_page(sgp, sg_page(sg), sg->length, 0);
2922 }
2923 bufflen += sgp->length;
2924
2925 sgp = sg_next(sgp);
2926 if (!sgp)
2927 break;
2928 }
2929
2930 cmd->sg = sg_srr;
2931 cmd->sg_cnt = sg_srr_cnt;
2932 cmd->bufflen = bufflen;
2933 cmd->offset += offset;
2934 cmd->free_sg = 1;
2935
2936 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
2937 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
2938 cmd->sg_cnt);
2939 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
2940 cmd->bufflen);
2941 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
2942 cmd->offset);
2943
2944 if (cmd->sg_cnt < 0)
2945 BUG();
2946
2947 if (cmd->bufflen < 0)
2948 BUG();
2949
2950 return 0;
2951}
2952
2953static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
2954 uint32_t srr_rel_offs, int *xmit_type)
2955{
2956 int res = 0, rel_offs;
2957
2958 rel_offs = srr_rel_offs - cmd->offset;
2959 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
2960 srr_rel_offs, rel_offs);
2961
2962 *xmit_type = QLA_TGT_XMIT_ALL;
2963
2964 if (rel_offs < 0) {
2965 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
2966 "qla_target(%d): SRR rel_offs (%d) < 0",
2967 cmd->vha->vp_idx, rel_offs);
2968 res = -1;
2969 } else if (rel_offs == cmd->bufflen)
2970 *xmit_type = QLA_TGT_XMIT_STATUS;
2971 else if (rel_offs > 0)
2972 res = qlt_set_data_offset(cmd, rel_offs);
2973
2974 return res;
2975}
2976
2977/* No locks, thread context */
2978static void qlt_handle_srr(struct scsi_qla_host *vha,
2979 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
2980{
2981 struct imm_ntfy_from_isp *ntfy =
2982 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
2983 struct qla_hw_data *ha = vha->hw;
2984 struct qla_tgt_cmd *cmd = sctio->cmd;
2985 struct se_cmd *se_cmd = &cmd->se_cmd;
2986 unsigned long flags;
2987 int xmit_type = 0, resp = 0;
2988 uint32_t offset;
2989 uint16_t srr_ui;
2990
2991 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
2992 srr_ui = ntfy->u.isp24.srr_ui;
2993
2994 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
2995 cmd, srr_ui);
2996
2997 switch (srr_ui) {
2998 case SRR_IU_STATUS:
2999 spin_lock_irqsave(&ha->hardware_lock, flags);
3000 qlt_send_notify_ack(vha, ntfy,
3001 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3002 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3003 xmit_type = QLA_TGT_XMIT_STATUS;
3004 resp = 1;
3005 break;
3006 case SRR_IU_DATA_IN:
3007 if (!cmd->sg || !cmd->sg_cnt) {
3008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3009 "Unable to process SRR_IU_DATA_IN due to"
3010 " missing cmd->sg, state: %d\n", cmd->state);
3011 dump_stack();
3012 goto out_reject;
3013 }
3014 if (se_cmd->scsi_status != 0) {
3015 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3016 "Rejecting SRR_IU_DATA_IN with non GOOD "
3017 "scsi_status\n");
3018 goto out_reject;
3019 }
3020 cmd->bufflen = se_cmd->data_length;
3021
3022 if (qlt_has_data(cmd)) {
3023 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3024 goto out_reject;
3025 spin_lock_irqsave(&ha->hardware_lock, flags);
3026 qlt_send_notify_ack(vha, ntfy,
3027 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3028 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3029 resp = 1;
3030 } else {
3031 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3032 "qla_target(%d): SRR for in data for cmd "
3033 "without them (tag %d, SCSI status %d), "
3034 "reject", vha->vp_idx, cmd->tag,
3035 cmd->se_cmd.scsi_status);
3036 goto out_reject;
3037 }
3038 break;
3039 case SRR_IU_DATA_OUT:
3040 if (!cmd->sg || !cmd->sg_cnt) {
3041 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3042 "Unable to process SRR_IU_DATA_OUT due to"
3043 " missing cmd->sg\n");
3044 dump_stack();
3045 goto out_reject;
3046 }
3047 if (se_cmd->scsi_status != 0) {
3048 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3049 "Rejecting SRR_IU_DATA_OUT"
3050 " with non GOOD scsi_status\n");
3051 goto out_reject;
3052 }
3053 cmd->bufflen = se_cmd->data_length;
3054
3055 if (qlt_has_data(cmd)) {
3056 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3057 goto out_reject;
3058 spin_lock_irqsave(&ha->hardware_lock, flags);
3059 qlt_send_notify_ack(vha, ntfy,
3060 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3061 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3062 if (xmit_type & QLA_TGT_XMIT_DATA)
3063 qlt_rdy_to_xfer(cmd);
3064 } else {
3065 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3066 "qla_target(%d): SRR for out data for cmd "
3067 "without them (tag %d, SCSI status %d), "
3068 "reject", vha->vp_idx, cmd->tag,
3069 cmd->se_cmd.scsi_status);
3070 goto out_reject;
3071 }
3072 break;
3073 default:
3074 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3075 "qla_target(%d): Unknown srr_ui value %x",
3076 vha->vp_idx, srr_ui);
3077 goto out_reject;
3078 }
3079
3080 /* Transmit response in case of status and data-in cases */
3081 if (resp)
3082 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3083
3084 return;
3085
3086out_reject:
3087 spin_lock_irqsave(&ha->hardware_lock, flags);
3088 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3089 NOTIFY_ACK_SRR_FLAGS_REJECT,
3090 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3091 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3092 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3093 cmd->state = QLA_TGT_STATE_DATA_IN;
3094 dump_stack();
3095 } else
3096 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3097 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3098}
3099
3100static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3101 struct qla_tgt_srr_imm *imm, int ha_locked)
3102{
3103 struct qla_hw_data *ha = vha->hw;
3104 unsigned long flags = 0;
3105
3106 if (!ha_locked)
3107 spin_lock_irqsave(&ha->hardware_lock, flags);
3108
3109 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3110 NOTIFY_ACK_SRR_FLAGS_REJECT,
3111 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3112 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3113
3114 if (!ha_locked)
3115 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3116
3117 kfree(imm);
3118}
3119
3120static void qlt_handle_srr_work(struct work_struct *work)
3121{
3122 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3123 struct scsi_qla_host *vha = tgt->vha;
3124 struct qla_tgt_srr_ctio *sctio;
3125 unsigned long flags;
3126
3127 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3128 tgt);
3129
3130restart:
3131 spin_lock_irqsave(&tgt->srr_lock, flags);
3132 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3133 struct qla_tgt_srr_imm *imm, *i, *ti;
3134 struct qla_tgt_cmd *cmd;
3135 struct se_cmd *se_cmd;
3136
3137 imm = NULL;
3138 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3139 srr_list_entry) {
3140 if (i->srr_id == sctio->srr_id) {
3141 list_del(&i->srr_list_entry);
3142 if (imm) {
3143 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3144 "qla_target(%d): There must be "
3145 "only one IMM SRR per CTIO SRR "
3146 "(IMM SRR %p, id %d, CTIO %p\n",
3147 vha->vp_idx, i, i->srr_id, sctio);
3148 qlt_reject_free_srr_imm(tgt->vha, i, 0);
3149 } else
3150 imm = i;
3151 }
3152 }
3153
3154 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3155 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3156 sctio->srr_id);
3157
3158 if (imm == NULL) {
3159 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3160 "Not found matching IMM for SRR CTIO (id %d)\n",
3161 sctio->srr_id);
3162 continue;
3163 } else
3164 list_del(&sctio->srr_list_entry);
3165
3166 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3167
3168 cmd = sctio->cmd;
3169 /*
3170 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3171 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3172 * logic..
3173 */
3174 cmd->offset = 0;
3175 if (cmd->free_sg) {
3176 kfree(cmd->sg);
3177 cmd->sg = NULL;
3178 cmd->free_sg = 0;
3179 }
3180 se_cmd = &cmd->se_cmd;
3181
3182 cmd->sg_cnt = se_cmd->t_data_nents;
3183 cmd->sg = se_cmd->t_data_sg;
3184
3185 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3186 "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3187 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3188 se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3189
3190 qlt_handle_srr(vha, sctio, imm);
3191
3192 kfree(imm);
3193 kfree(sctio);
3194 goto restart;
3195 }
3196 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3197}
3198
3199/* ha->hardware_lock supposed to be held on entry */
3200static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3201 struct imm_ntfy_from_isp *iocb)
3202{
3203 struct qla_tgt_srr_imm *imm;
3204 struct qla_hw_data *ha = vha->hw;
3205 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3206 struct qla_tgt_srr_ctio *sctio;
3207
3208 tgt->imm_srr_id++;
3209
3210 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3211 vha->vp_idx);
3212
3213 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3214 if (imm != NULL) {
3215 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3216
3217 /* IRQ is already OFF */
3218 spin_lock(&tgt->srr_lock);
3219 imm->srr_id = tgt->imm_srr_id;
3220 list_add_tail(&imm->srr_list_entry,
3221 &tgt->srr_imm_list);
3222 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3223 "IMM NTFY SRR %p added (id %d, ui %x)\n",
3224 imm, imm->srr_id, iocb->u.isp24.srr_ui);
3225 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3226 int found = 0;
3227 list_for_each_entry(sctio, &tgt->srr_ctio_list,
3228 srr_list_entry) {
3229 if (sctio->srr_id == imm->srr_id) {
3230 found = 1;
3231 break;
3232 }
3233 }
3234 if (found) {
3235 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3236 "Scheduling srr work\n");
3237 schedule_work(&tgt->srr_work);
3238 } else {
3239 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3240 "qla_target(%d): imm_srr_id "
3241 "== ctio_srr_id (%d), but there is no "
3242 "corresponding SRR CTIO, deleting IMM "
3243 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3244 imm);
3245 list_del(&imm->srr_list_entry);
3246
3247 kfree(imm);
3248
3249 spin_unlock(&tgt->srr_lock);
3250 goto out_reject;
3251 }
3252 }
3253 spin_unlock(&tgt->srr_lock);
3254 } else {
3255 struct qla_tgt_srr_ctio *ts;
3256
3257 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3258 "qla_target(%d): Unable to allocate SRR IMM "
3259 "entry, SRR request will be rejected\n", vha->vp_idx);
3260
3261 /* IRQ is already OFF */
3262 spin_lock(&tgt->srr_lock);
3263 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3264 srr_list_entry) {
3265 if (sctio->srr_id == tgt->imm_srr_id) {
3266 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3267 "CTIO SRR %p deleted (id %d)\n",
3268 sctio, sctio->srr_id);
3269 list_del(&sctio->srr_list_entry);
3270 qlt_send_term_exchange(vha, sctio->cmd,
3271 &sctio->cmd->atio, 1);
3272 kfree(sctio);
3273 }
3274 }
3275 spin_unlock(&tgt->srr_lock);
3276 goto out_reject;
3277 }
3278
3279 return;
3280
3281out_reject:
3282 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3283 NOTIFY_ACK_SRR_FLAGS_REJECT,
3284 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3285 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3286}
3287
3288/*
3289 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3290 */
3291static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3292 struct imm_ntfy_from_isp *iocb)
3293{
3294 struct qla_hw_data *ha = vha->hw;
3295 uint32_t add_flags = 0;
3296 int send_notify_ack = 1;
3297 uint16_t status;
3298
3299 status = le16_to_cpu(iocb->u.isp2x.status);
3300 switch (status) {
3301 case IMM_NTFY_LIP_RESET:
3302 {
3303 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3304 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3305 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3306 iocb->u.isp24.status_subcode);
3307
3308 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3309 send_notify_ack = 0;
3310 break;
3311 }
3312
3313 case IMM_NTFY_LIP_LINK_REINIT:
3314 {
3315 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3316 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3317 "qla_target(%d): LINK REINIT (loop %#x, "
3318 "subcode %x)\n", vha->vp_idx,
3319 le16_to_cpu(iocb->u.isp24.nport_handle),
3320 iocb->u.isp24.status_subcode);
3321 if (tgt->link_reinit_iocb_pending) {
3322 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3323 0, 0, 0, 0, 0, 0);
3324 }
3325 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3326 tgt->link_reinit_iocb_pending = 1;
3327 /*
3328 * QLogic requires to wait after LINK REINIT for possible
3329 * PDISC or ADISC ELS commands
3330 */
3331 send_notify_ack = 0;
3332 break;
3333 }
3334
3335 case IMM_NTFY_PORT_LOGOUT:
3336 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3337 "qla_target(%d): Port logout (loop "
3338 "%#x, subcode %x)\n", vha->vp_idx,
3339 le16_to_cpu(iocb->u.isp24.nport_handle),
3340 iocb->u.isp24.status_subcode);
3341
3342 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3343 send_notify_ack = 0;
3344 /* The sessions will be cleared in the callback, if needed */
3345 break;
3346
3347 case IMM_NTFY_GLBL_TPRLO:
3348 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3349 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3350 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3351 send_notify_ack = 0;
3352 /* The sessions will be cleared in the callback, if needed */
3353 break;
3354
3355 case IMM_NTFY_PORT_CONFIG:
3356 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3357 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3358 status);
3359 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3360 send_notify_ack = 0;
3361 /* The sessions will be cleared in the callback, if needed */
3362 break;
3363
3364 case IMM_NTFY_GLBL_LOGO:
3365 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3366 "qla_target(%d): Link failure detected\n",
3367 vha->vp_idx);
3368 /* I_T nexus loss */
3369 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3370 send_notify_ack = 0;
3371 break;
3372
3373 case IMM_NTFY_IOCB_OVERFLOW:
3374 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3375 "qla_target(%d): Cannot provide requested "
3376 "capability (IOCB overflowed the immediate notify "
3377 "resource count)\n", vha->vp_idx);
3378 break;
3379
3380 case IMM_NTFY_ABORT_TASK:
3381 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3382 "qla_target(%d): Abort Task (S %08x I %#x -> "
3383 "L %#x)\n", vha->vp_idx,
3384 le16_to_cpu(iocb->u.isp2x.seq_id),
3385 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3386 le16_to_cpu(iocb->u.isp2x.lun));
3387 if (qlt_abort_task(vha, iocb) == 0)
3388 send_notify_ack = 0;
3389 break;
3390
3391 case IMM_NTFY_RESOURCE:
3392 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3393 "qla_target(%d): Out of resources, host %ld\n",
3394 vha->vp_idx, vha->host_no);
3395 break;
3396
3397 case IMM_NTFY_MSG_RX:
3398 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3399 "qla_target(%d): Immediate notify task %x\n",
3400 vha->vp_idx, iocb->u.isp2x.task_flags);
3401 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3402 send_notify_ack = 0;
3403 break;
3404
3405 case IMM_NTFY_ELS:
3406 if (qlt_24xx_handle_els(vha, iocb) == 0)
3407 send_notify_ack = 0;
3408 break;
3409
3410 case IMM_NTFY_SRR:
3411 qlt_prepare_srr_imm(vha, iocb);
3412 send_notify_ack = 0;
3413 break;
3414
3415 default:
3416 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3417 "qla_target(%d): Received unknown immediate "
3418 "notify status %x\n", vha->vp_idx, status);
3419 break;
3420 }
3421
3422 if (send_notify_ack)
3423 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3424}
3425
3426/*
3427 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3428 * This function sends busy to ISP 2xxx or 24xx.
3429 */
3430static void qlt_send_busy(struct scsi_qla_host *vha,
3431 struct atio_from_isp *atio, uint16_t status)
3432{
3433 struct ctio7_to_24xx *ctio24;
3434 struct qla_hw_data *ha = vha->hw;
3435 request_t *pkt;
3436 struct qla_tgt_sess *sess = NULL;
3437
3438 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3439 atio->u.isp24.fcp_hdr.s_id);
3440 if (!sess) {
3441 qlt_send_term_exchange(vha, NULL, atio, 1);
3442 return;
3443 }
3444 /* Sending marker isn't necessary, since we called from ISR */
3445
3446 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3447 if (!pkt) {
3448 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3449 "qla_target(%d): %s failed: unable to allocate "
3450 "request packet", vha->vp_idx, __func__);
3451 return;
3452 }
3453
3454 pkt->entry_count = 1;
3455 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3456
3457 ctio24 = (struct ctio7_to_24xx *)pkt;
3458 ctio24->entry_type = CTIO_TYPE7;
3459 ctio24->nport_handle = sess->loop_id;
3460 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3461 ctio24->vp_index = vha->vp_idx;
3462 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3463 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3464 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3465 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3466 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3467 __constant_cpu_to_le16(
3468 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3469 CTIO7_FLAGS_DONT_RET_CTIO);
3470 /*
3471 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3472 * if the explicit conformation is used.
3473 */
3474 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3475 ctio24->u.status1.scsi_status = cpu_to_le16(status);
3476 ctio24->u.status1.residual = get_unaligned((uint32_t *)
3477 &atio->u.isp24.fcp_cmnd.add_cdb[
3478 atio->u.isp24.fcp_cmnd.add_cdb_len]);
3479 if (ctio24->u.status1.residual != 0)
3480 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3481
3482 qla2x00_start_iocbs(vha, vha->req);
3483}
3484
3485/* ha->hardware_lock supposed to be held on entry */
3486/* called via callback from qla2xxx */
3487static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3488 struct atio_from_isp *atio)
3489{
3490 struct qla_hw_data *ha = vha->hw;
3491 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3492 int rc;
3493
3494 if (unlikely(tgt == NULL)) {
3495 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3496 "ATIO pkt, but no tgt (ha %p)", ha);
3497 return;
3498 }
3499 ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3500 "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3501 vha->vp_idx, atio, atio->u.raw.entry_type,
3502 atio->u.raw.entry_count);
3503 /*
3504 * In tgt_stop mode we also should allow all requests to pass.
3505 * Otherwise, some commands can stuck.
3506 */
3507
3508 tgt->irq_cmd_count++;
3509
3510 switch (atio->u.raw.entry_type) {
3511 case ATIO_TYPE7:
3512 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3513 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3514 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3515 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3516 atio->u.isp24.fcp_cmnd.rddata,
3517 atio->u.isp24.fcp_cmnd.wrdata,
3518 atio->u.isp24.fcp_cmnd.add_cdb_len,
3519 be32_to_cpu(get_unaligned((uint32_t *)
3520 &atio->u.isp24.fcp_cmnd.add_cdb[
3521 atio->u.isp24.fcp_cmnd.add_cdb_len])),
3522 atio->u.isp24.fcp_hdr.s_id[0],
3523 atio->u.isp24.fcp_hdr.s_id[1],
3524 atio->u.isp24.fcp_hdr.s_id[2]);
3525
3526 if (unlikely(atio->u.isp24.exchange_addr ==
3527 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3528 ql_dbg(ql_dbg_tgt, vha, 0xe058,
3529 "qla_target(%d): ATIO_TYPE7 "
3530 "received with UNKNOWN exchange address, "
3531 "sending QUEUE_FULL\n", vha->vp_idx);
3532 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3533 break;
3534 }
3535 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3536 rc = qlt_handle_cmd_for_atio(vha, atio);
3537 else
3538 rc = qlt_handle_task_mgmt(vha, atio);
3539 if (unlikely(rc != 0)) {
3540 if (rc == -ESRCH) {
3541#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3542 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3543#else
3544 qlt_send_term_exchange(vha, NULL, atio, 1);
3545#endif
3546 } else {
3547 if (tgt->tgt_stop) {
3548 ql_dbg(ql_dbg_tgt, vha, 0xe059,
3549 "qla_target: Unable to send "
3550 "command to target for req, "
3551 "ignoring.\n");
3552 } else {
3553 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3554 "qla_target(%d): Unable to send "
3555 "command to target, sending BUSY "
3556 "status.\n", vha->vp_idx);
3557 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3558 }
3559 }
3560 }
3561 break;
3562
3563 case IMMED_NOTIFY_TYPE:
3564 {
3565 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3566 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3567 "qla_target(%d): Received ATIO packet %x "
3568 "with error status %x\n", vha->vp_idx,
3569 atio->u.raw.entry_type,
3570 atio->u.isp2x.entry_status);
3571 break;
3572 }
3573 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3574 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3575 break;
3576 }
3577
3578 default:
3579 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3580 "qla_target(%d): Received unknown ATIO atio "
3581 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3582 break;
3583 }
3584
3585 tgt->irq_cmd_count--;
3586}
3587
3588/* ha->hardware_lock supposed to be held on entry */
3589/* called via callback from qla2xxx */
3590static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3591{
3592 struct qla_hw_data *ha = vha->hw;
3593 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3594
3595 if (unlikely(tgt == NULL)) {
3596 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3597 "qla_target(%d): Response pkt %x received, but no "
3598 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3599 return;
3600 }
3601
3602 ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3603 "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3604 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3605 pkt->entry_count, pkt->entry_status, pkt->handle);
3606
3607 /*
3608 * In tgt_stop mode we also should allow all requests to pass.
3609 * Otherwise, some commands can stuck.
3610 */
3611
3612 tgt->irq_cmd_count++;
3613
3614 switch (pkt->entry_type) {
3615 case CTIO_TYPE7:
3616 {
3617 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3618 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3619 vha->vp_idx);
3620 qlt_do_ctio_completion(vha, entry->handle,
3621 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3622 entry);
3623 break;
3624 }
3625
3626 case ACCEPT_TGT_IO_TYPE:
3627 {
3628 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3629 int rc;
3630 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3631 "ACCEPT_TGT_IO instance %d status %04x "
3632 "lun %04x read/write %d data_length %04x "
3633 "target_id %02x rx_id %04x\n ", vha->vp_idx,
3634 le16_to_cpu(atio->u.isp2x.status),
3635 le16_to_cpu(atio->u.isp2x.lun),
3636 atio->u.isp2x.execution_codes,
3637 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3638 atio), atio->u.isp2x.rx_id);
3639 if (atio->u.isp2x.status !=
3640 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3641 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3642 "qla_target(%d): ATIO with error "
3643 "status %x received\n", vha->vp_idx,
3644 le16_to_cpu(atio->u.isp2x.status));
3645 break;
3646 }
3647 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3648 "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3649 atio->u.isp2x.cdb[0], (unsigned long
3650 int)sizeof(atio->u.isp2x.cdb));
3651
3652 rc = qlt_handle_cmd_for_atio(vha, atio);
3653 if (unlikely(rc != 0)) {
3654 if (rc == -ESRCH) {
3655#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3656 qlt_send_busy(vha, atio, 0);
3657#else
3658 qlt_send_term_exchange(vha, NULL, atio, 1);
3659#endif
3660 } else {
3661 if (tgt->tgt_stop) {
3662 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3663 "qla_target: Unable to send "
3664 "command to target, sending TERM "
3665 "EXCHANGE for rsp\n");
3666 qlt_send_term_exchange(vha, NULL,
3667 atio, 1);
3668 } else {
3669 ql_dbg(ql_dbg_tgt, vha, 0xe060,
3670 "qla_target(%d): Unable to send "
3671 "command to target, sending BUSY "
3672 "status\n", vha->vp_idx);
3673 qlt_send_busy(vha, atio, 0);
3674 }
3675 }
3676 }
3677 }
3678 break;
3679
3680 case CONTINUE_TGT_IO_TYPE:
3681 {
3682 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3683 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3684 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3685 qlt_do_ctio_completion(vha, entry->handle,
3686 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3687 entry);
3688 break;
3689 }
3690
3691 case CTIO_A64_TYPE:
3692 {
3693 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3694 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3695 vha->vp_idx);
3696 qlt_do_ctio_completion(vha, entry->handle,
3697 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3698 entry);
3699 break;
3700 }
3701
3702 case IMMED_NOTIFY_TYPE:
3703 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3704 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3705 break;
3706
3707 case NOTIFY_ACK_TYPE:
3708 if (tgt->notify_ack_expected > 0) {
3709 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3710 ql_dbg(ql_dbg_tgt, vha, 0xe036,
3711 "NOTIFY_ACK seq %08x status %x\n",
3712 le16_to_cpu(entry->u.isp2x.seq_id),
3713 le16_to_cpu(entry->u.isp2x.status));
3714 tgt->notify_ack_expected--;
3715 if (entry->u.isp2x.status !=
3716 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3717 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3718 "qla_target(%d): NOTIFY_ACK "
3719 "failed %x\n", vha->vp_idx,
3720 le16_to_cpu(entry->u.isp2x.status));
3721 }
3722 } else {
3723 ql_dbg(ql_dbg_tgt, vha, 0xe062,
3724 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3725 vha->vp_idx);
3726 }
3727 break;
3728
3729 case ABTS_RECV_24XX:
3730 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3731 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3732 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3733 break;
3734
3735 case ABTS_RESP_24XX:
3736 if (tgt->abts_resp_expected > 0) {
3737 struct abts_resp_from_24xx_fw *entry =
3738 (struct abts_resp_from_24xx_fw *)pkt;
3739 ql_dbg(ql_dbg_tgt, vha, 0xe038,
3740 "ABTS_RESP_24XX: compl_status %x\n",
3741 entry->compl_status);
3742 tgt->abts_resp_expected--;
3743 if (le16_to_cpu(entry->compl_status) !=
3744 ABTS_RESP_COMPL_SUCCESS) {
3745 if ((entry->error_subcode1 == 0x1E) &&
3746 (entry->error_subcode2 == 0)) {
3747 /*
3748 * We've got a race here: aborted
3749 * exchange not terminated, i.e.
3750 * response for the aborted command was
3751 * sent between the abort request was
3752 * received and processed.
3753 * Unfortunately, the firmware has a
3754 * silly requirement that all aborted
3755 * exchanges must be explicitely
3756 * terminated, otherwise it refuses to
3757 * send responses for the abort
3758 * requests. So, we have to
3759 * (re)terminate the exchange and retry
3760 * the abort response.
3761 */
3762 qlt_24xx_retry_term_exchange(vha,
3763 entry);
3764 } else
3765 ql_dbg(ql_dbg_tgt, vha, 0xe063,
3766 "qla_target(%d): ABTS_RESP_24XX "
3767 "failed %x (subcode %x:%x)",
3768 vha->vp_idx, entry->compl_status,
3769 entry->error_subcode1,
3770 entry->error_subcode2);
3771 }
3772 } else {
3773 ql_dbg(ql_dbg_tgt, vha, 0xe064,
3774 "qla_target(%d): Unexpected ABTS_RESP_24XX "
3775 "received\n", vha->vp_idx);
3776 }
3777 break;
3778
3779 default:
3780 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3781 "qla_target(%d): Received unknown response pkt "
3782 "type %x\n", vha->vp_idx, pkt->entry_type);
3783 break;
3784 }
3785
3786 tgt->irq_cmd_count--;
3787}
3788
3789/*
3790 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3791 */
3792void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3793 uint16_t *mailbox)
3794{
3795 struct qla_hw_data *ha = vha->hw;
3796 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4f1d0f19 3797 int login_code;
2d70c103
NB		 3798
3799 ql_dbg(ql_dbg_tgt, vha, 0xe039,
3800 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3801 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3802 ha->operating_mode, ha->current_topology);
3803
3804 if (!ha->tgt.tgt_ops)
3805 return;
3806
3807 if (unlikely(tgt == NULL)) {
3808 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3809 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3810 return;
3811 }
3812
3813 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3814 IS_QLA2100(ha))
3815 return;
3816 /*
3817 * In tgt_stop mode we also should allow all requests to pass.
3818 * Otherwise, some commands can stuck.
3819 */
3820
3821 tgt->irq_cmd_count++;
3822
3823 switch (code) {
3824 case MBA_RESET: /* Reset */
3825 case MBA_SYSTEM_ERR: /* System Error */
3826 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
3827 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
3828 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3829 "qla_target(%d): System error async event %#x "
6efb3c0a 3830 "occurred", vha->vp_idx, code);
2d70c103
NB		 3831 break;
3832 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
3833 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3834 break;
3835
3836 case MBA_LOOP_UP:
3837 {
3838 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6efb3c0a 3839 "qla_target(%d): Async LOOP_UP occurred "
4f1d0f19
AC		 3840 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3841 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3842 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 3843 if (tgt->link_reinit_iocb_pending) {
3844 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3845 0, 0, 0, 0, 0, 0);
3846 tgt->link_reinit_iocb_pending = 0;
3847 }
3848 break;
3849 }
3850
3851 case MBA_LIP_OCCURRED:
3852 case MBA_LOOP_DOWN:
3853 case MBA_LIP_RESET:
3854 case MBA_RSCN_UPDATE:
3855 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6efb3c0a 3856 "qla_target(%d): Async event %#x occurred "
4f1d0f19
AC		 3857 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3858 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3859 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 3860 break;
3861
3862 case MBA_PORT_UPDATE:
3863 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
3864 "qla_target(%d): Port update async event %#x "
6efb3c0a 3865 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4f1d0f19
AC		 3866 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3867 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3868 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3869
3870 login_code = le16_to_cpu(mailbox[2]);
3871 if (login_code == 0x4)
2d70c103
NB		 3872 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
3873 "Async MB 2: Got PLOGI Complete\n");
4f1d0f19 3874 else if (login_code == 0x7)
2d70c103
NB		 3875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
3876 "Async MB 2: Port Logged Out\n");
3877 break;
3878
3879 default:
3880 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
6efb3c0a 3881 "qla_target(%d): Async event %#x occurred: "
4f1d0f19
AC		 3882 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3883 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3884 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 3885 break;
3886 }
3887
3888 tgt->irq_cmd_count--;
3889}
3890
3891static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
3892 uint16_t loop_id)
3893{
3894 fc_port_t *fcport;
3895 int rc;
3896
3897 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
3898 if (!fcport) {
3899 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
3900 "qla_target(%d): Allocation of tmp FC port failed",
3901 vha->vp_idx);
3902 return NULL;
3903 }
3904
3905 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
3906
3907 fcport->loop_id = loop_id;
3908
3909 rc = qla2x00_get_port_database(vha, fcport, 0);
3910 if (rc != QLA_SUCCESS) {
3911 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
3912 "qla_target(%d): Failed to retrieve fcport "
3913 "information -- get_port_database() returned %x "
3914 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
3915 kfree(fcport);
3916 return NULL;
3917 }
3918
3919 return fcport;
3920}
3921
3922/* Must be called under tgt_mutex */
3923static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
3924 uint8_t *s_id)
3925{
3926 struct qla_hw_data *ha = vha->hw;
3927 struct qla_tgt_sess *sess = NULL;
3928 fc_port_t *fcport = NULL;
3929 int rc, global_resets;
3930 uint16_t loop_id = 0;
3931
3932retry:
3933 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
3934
3935 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
3936 if (rc != 0) {
3937 if ((s_id[0] == 0xFF) &&
3938 (s_id[1] == 0xFC)) {
3939 /*
3940 * This is Domain Controller, so it should be
3941 * OK to drop SCSI commands from it.
3942 */
3943 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
3944 "Unable to find initiator with S_ID %x:%x:%x",
3945 s_id[0], s_id[1], s_id[2]);
3946 } else
3947 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
3948 "qla_target(%d): Unable to find "
3949 "initiator with S_ID %x:%x:%x",
3950 vha->vp_idx, s_id[0], s_id[1],
3951 s_id[2]);
3952 return NULL;
3953 }
3954
3955 fcport = qlt_get_port_database(vha, loop_id);
3956 if (!fcport)
3957 return NULL;
3958
3959 if (global_resets !=
3960 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
3961 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
3962 "qla_target(%d): global reset during session discovery "
3963 "(counter was %d, new %d), retrying", vha->vp_idx,
3964 global_resets,
3965 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
3966 goto retry;
3967 }
3968
3969 sess = qlt_create_sess(vha, fcport, true);
3970
3971 kfree(fcport);
3972 return sess;
3973}
3974
3975static void qlt_abort_work(struct qla_tgt *tgt,
3976 struct qla_tgt_sess_work_param *prm)
3977{
3978 struct scsi_qla_host *vha = tgt->vha;
3979 struct qla_hw_data *ha = vha->hw;
3980 struct qla_tgt_sess *sess = NULL;
3981 unsigned long flags;
3982 uint32_t be_s_id;
3983 uint8_t s_id[3];
3984 int rc;
3985
3986 spin_lock_irqsave(&ha->hardware_lock, flags);
3987
3988 if (tgt->tgt_stop)
3989 goto out_term;
3990
3991 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
3992 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
3993 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
3994
3995 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3996 (unsigned char *)&be_s_id);
3997 if (!sess) {
3998 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3999
4000 mutex_lock(&ha->tgt.tgt_mutex);
4001 sess = qlt_make_local_sess(vha, s_id);
4002 /* sess has got an extra creation ref */
4003 mutex_unlock(&ha->tgt.tgt_mutex);
4004
4005 spin_lock_irqsave(&ha->hardware_lock, flags);
4006 if (!sess)
4007 goto out_term;
4008 } else {
4009 kref_get(&sess->se_sess->sess_kref);
4010 }
4011
4012 if (tgt->tgt_stop)
4013 goto out_term;
4014
4015 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4016 if (rc != 0)
4017 goto out_term;
2d70c103
NB		 4018
4019 ha->tgt.tgt_ops->put_sess(sess);
08234e3a 4020 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 4021 return;
4022
4023out_term:
4024 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
2d70c103
NB		 4025 if (sess)
4026 ha->tgt.tgt_ops->put_sess(sess);
08234e3a 4027 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 4028}
4029
4030static void qlt_tmr_work(struct qla_tgt *tgt,
4031 struct qla_tgt_sess_work_param *prm)
4032{
4033 struct atio_from_isp *a = &prm->tm_iocb2;
4034 struct scsi_qla_host *vha = tgt->vha;
4035 struct qla_hw_data *ha = vha->hw;
4036 struct qla_tgt_sess *sess = NULL;
4037 unsigned long flags;
4038 uint8_t *s_id = NULL; /* to hide compiler warnings */
4039 int rc;
4040 uint32_t lun, unpacked_lun;
4041 int lun_size, fn;
4042 void *iocb;
4043
4044 spin_lock_irqsave(&ha->hardware_lock, flags);
4045
4046 if (tgt->tgt_stop)
4047 goto out_term;
4048
4049 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4050 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4051 if (!sess) {
4052 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4053
4054 mutex_lock(&ha->tgt.tgt_mutex);
4055 sess = qlt_make_local_sess(vha, s_id);
4056 /* sess has got an extra creation ref */
4057 mutex_unlock(&ha->tgt.tgt_mutex);
4058
4059 spin_lock_irqsave(&ha->hardware_lock, flags);
4060 if (!sess)
4061 goto out_term;
4062 } else {
4063 kref_get(&sess->se_sess->sess_kref);
4064 }
4065
4066 iocb = a;
4067 lun = a->u.isp24.fcp_cmnd.lun;
4068 lun_size = sizeof(lun);
4069 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4070 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4071
4072 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4073 if (rc != 0)
4074 goto out_term;
2d70c103
NB		 4075
4076 ha->tgt.tgt_ops->put_sess(sess);
08234e3a 4077 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 4078 return;
4079
4080out_term:
4081 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
2d70c103
NB		 4082 if (sess)
4083 ha->tgt.tgt_ops->put_sess(sess);
08234e3a 4084 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 4085}
4086
4087static void qlt_sess_work_fn(struct work_struct *work)
4088{
4089 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4090 struct scsi_qla_host *vha = tgt->vha;
4091 unsigned long flags;
4092
4093 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4094
4095 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4096 while (!list_empty(&tgt->sess_works_list)) {
4097 struct qla_tgt_sess_work_param *prm = list_entry(
4098 tgt->sess_works_list.next, typeof(*prm),
4099 sess_works_list_entry);
4100
4101 /*
4102 * This work can be scheduled on several CPUs at time, so we
4103 * must delete the entry to eliminate double processing
4104 */
4105 list_del(&prm->sess_works_list_entry);
4106
4107 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4108
4109 switch (prm->type) {
4110 case QLA_TGT_SESS_WORK_ABORT:
4111 qlt_abort_work(tgt, prm);
4112 break;
4113 case QLA_TGT_SESS_WORK_TM:
4114 qlt_tmr_work(tgt, prm);
4115 break;
4116 default:
4117 BUG_ON(1);
4118 break;
4119 }
4120
4121 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4122
4123 kfree(prm);
4124 }
4125 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4126}
4127
4128/* Must be called under tgt_host_action_mutex */
4129int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4130{
4131 struct qla_tgt *tgt;
4132
4133 if (!QLA_TGT_MODE_ENABLED())
4134 return 0;
4135
33c36c0a
AE		 4136 if (!IS_TGT_MODE_CAPABLE(ha)) {
4137 ql_log(ql_log_warn, base_vha, 0xe070,
4138 "This adapter does not support target mode.\n");
4139 return 0;
4140 }
4141
2d70c103
NB		 4142 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4143 "Registering target for host %ld(%p)", base_vha->host_no, ha);
4144
4145 BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4146
4147 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4148 if (!tgt) {
4149 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4150 "Unable to allocate struct qla_tgt\n");
4151 return -ENOMEM;
4152 }
4153
4154 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4155 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4156
4157 tgt->ha = ha;
4158 tgt->vha = base_vha;
4159 init_waitqueue_head(&tgt->waitQ);
4160 INIT_LIST_HEAD(&tgt->sess_list);
4161 INIT_LIST_HEAD(&tgt->del_sess_list);
4162 INIT_DELAYED_WORK(&tgt->sess_del_work,
4163 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4164 spin_lock_init(&tgt->sess_work_lock);
4165 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4166 INIT_LIST_HEAD(&tgt->sess_works_list);
4167 spin_lock_init(&tgt->srr_lock);
4168 INIT_LIST_HEAD(&tgt->srr_ctio_list);
4169 INIT_LIST_HEAD(&tgt->srr_imm_list);
4170 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4171 atomic_set(&tgt->tgt_global_resets_count, 0);
4172
4173 ha->tgt.qla_tgt = tgt;
4174
4175 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4176 "qla_target(%d): using 64 Bit PCI addressing",
4177 base_vha->vp_idx);
4178 tgt->tgt_enable_64bit_addr = 1;
4179 /* 3 is reserved */
4180 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4181 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4182 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4183
4184 mutex_lock(&qla_tgt_mutex);
4185 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4186 mutex_unlock(&qla_tgt_mutex);
4187
4188 return 0;
4189}
4190
4191/* Must be called under tgt_host_action_mutex */
4192int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4193{
4194 if (!ha->tgt.qla_tgt)
4195 return 0;
4196
4197 mutex_lock(&qla_tgt_mutex);
4198 list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4199 mutex_unlock(&qla_tgt_mutex);
4200
4201 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4202 vha->host_no, ha);
4203 qlt_release(ha->tgt.qla_tgt);
4204
4205 return 0;
4206}
4207
4208static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4209 unsigned char *b)
4210{
4211 int i;
4212
4213 pr_debug("qla2xxx HW vha->node_name: ");
4214 for (i = 0; i < WWN_SIZE; i++)
4215 pr_debug("%02x ", vha->node_name[i]);
4216 pr_debug("\n");
4217 pr_debug("qla2xxx HW vha->port_name: ");
4218 for (i = 0; i < WWN_SIZE; i++)
4219 pr_debug("%02x ", vha->port_name[i]);
4220 pr_debug("\n");
4221
4222 pr_debug("qla2xxx passed configfs WWPN: ");
4223 put_unaligned_be64(wwpn, b);
4224 for (i = 0; i < WWN_SIZE; i++)
4225 pr_debug("%02x ", b[i]);
4226 pr_debug("\n");
4227}
4228
4229/**
4230 * qla_tgt_lport_register - register lport with external module
4231 *
4232 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4233 * @wwpn: Passwd FC target WWPN
4234 * @callback: lport initialization callback for tcm_qla2xxx code
4235 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4236 */
4237int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4238 int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4239{
4240 struct qla_tgt *tgt;
4241 struct scsi_qla_host *vha;
4242 struct qla_hw_data *ha;
4243 struct Scsi_Host *host;
4244 unsigned long flags;
4245 int rc;
4246 u8 b[WWN_SIZE];
4247
4248 mutex_lock(&qla_tgt_mutex);
4249 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4250 vha = tgt->vha;
4251 ha = vha->hw;
4252
4253 host = vha->host;
4254 if (!host)
4255 continue;
4256
4257 if (ha->tgt.tgt_ops != NULL)
4258 continue;
4259
4260 if (!(host->hostt->supported_mode & MODE_TARGET))
4261 continue;
4262
4263 spin_lock_irqsave(&ha->hardware_lock, flags);
4264 if (host->active_mode & MODE_TARGET) {
4265 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4266 host->host_no);
4267 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4268 continue;
4269 }
4270 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4271
4272 if (!scsi_host_get(host)) {
4273 ql_dbg(ql_dbg_tgt, vha, 0xe068,
4274 "Unable to scsi_host_get() for"
4275 " qla2xxx scsi_host\n");
4276 continue;
4277 }
4278 qlt_lport_dump(vha, wwpn, b);
4279
4280 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4281 scsi_host_put(host);
4282 continue;
4283 }
4284 /*
4285 * Setup passed parameters ahead of invoking callback
4286 */
4287 ha->tgt.tgt_ops = qla_tgt_ops;
4288 ha->tgt.target_lport_ptr = target_lport_ptr;
4289 rc = (*callback)(vha);
4290 if (rc != 0) {
4291 ha->tgt.tgt_ops = NULL;
4292 ha->tgt.target_lport_ptr = NULL;
2930d441 4293 scsi_host_put(host);
2d70c103
NB		 4294 }
4295 mutex_unlock(&qla_tgt_mutex);
4296 return rc;
4297 }
4298 mutex_unlock(&qla_tgt_mutex);
4299
4300 return -ENODEV;
4301}
4302EXPORT_SYMBOL(qlt_lport_register);
4303
4304/**
4305 * qla_tgt_lport_deregister - Degister lport
4306 *
4307 * @vha: Registered scsi_qla_host pointer
4308 */
4309void qlt_lport_deregister(struct scsi_qla_host *vha)
4310{
4311 struct qla_hw_data *ha = vha->hw;
4312 struct Scsi_Host *sh = vha->host;
4313 /*
4314 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4315 */
4316 ha->tgt.target_lport_ptr = NULL;
4317 ha->tgt.tgt_ops = NULL;
4318 /*
4319 * Release the Scsi_Host reference for the underlying qla2xxx host
4320 */
4321 scsi_host_put(sh);
4322}
4323EXPORT_SYMBOL(qlt_lport_deregister);
4324
4325/* Must be called under HW lock */
4326void qlt_set_mode(struct scsi_qla_host *vha)
4327{
4328 struct qla_hw_data *ha = vha->hw;
4329
4330 switch (ql2x_ini_mode) {
4331 case QLA2XXX_INI_MODE_DISABLED:
4332 case QLA2XXX_INI_MODE_EXCLUSIVE:
4333 vha->host->active_mode = MODE_TARGET;
4334 break;
4335 case QLA2XXX_INI_MODE_ENABLED:
4336 vha->host->active_mode |= MODE_TARGET;
4337 break;
4338 default:
4339 break;
4340 }
4341
4342 if (ha->tgt.ini_mode_force_reverse)
4343 qla_reverse_ini_mode(vha);
4344}
4345
4346/* Must be called under HW lock */
4347void qlt_clear_mode(struct scsi_qla_host *vha)
4348{
4349 struct qla_hw_data *ha = vha->hw;
4350
4351 switch (ql2x_ini_mode) {
4352 case QLA2XXX_INI_MODE_DISABLED:
4353 vha->host->active_mode = MODE_UNKNOWN;
4354 break;
4355 case QLA2XXX_INI_MODE_EXCLUSIVE:
4356 vha->host->active_mode = MODE_INITIATOR;
4357 break;
4358 case QLA2XXX_INI_MODE_ENABLED:
4359 vha->host->active_mode &= ~MODE_TARGET;
4360 break;
4361 default:
4362 break;
4363 }
4364
4365 if (ha->tgt.ini_mode_force_reverse)
4366 qla_reverse_ini_mode(vha);
4367}
4368
4369/*
4370 * qla_tgt_enable_vha - NO LOCK HELD
4371 *
4372 * host_reset, bring up w/ Target Mode Enabled
4373 */
4374void
4375qlt_enable_vha(struct scsi_qla_host *vha)
4376{
4377 struct qla_hw_data *ha = vha->hw;
4378 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4379 unsigned long flags;
4380
4381 if (!tgt) {
4382 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4383 "Unable to locate qla_tgt pointer from"
4384 " struct qla_hw_data\n");
4385 dump_stack();
4386 return;
4387 }
4388
4389 spin_lock_irqsave(&ha->hardware_lock, flags);
4390 tgt->tgt_stopped = 0;
4391 qlt_set_mode(vha);
4392 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4393
4394 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4395 qla2xxx_wake_dpc(vha);
4396 qla2x00_wait_for_hba_online(vha);
4397}
4398EXPORT_SYMBOL(qlt_enable_vha);
4399
4400/*
4401 * qla_tgt_disable_vha - NO LOCK HELD
4402 *
4403 * Disable Target Mode and reset the adapter
4404 */
4405void
4406qlt_disable_vha(struct scsi_qla_host *vha)
4407{
4408 struct qla_hw_data *ha = vha->hw;
4409 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4410 unsigned long flags;
4411
4412 if (!tgt) {
4413 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4414 "Unable to locate qla_tgt pointer from"
4415 " struct qla_hw_data\n");
4416 dump_stack();
4417 return;
4418 }
4419
4420 spin_lock_irqsave(&ha->hardware_lock, flags);
4421 qlt_clear_mode(vha);
4422 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4423
4424 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4425 qla2xxx_wake_dpc(vha);
4426 qla2x00_wait_for_hba_online(vha);
4427}
4428
4429/*
4430 * Called from qla_init.c:qla24xx_vport_create() contex to setup
4431 * the target mode specific struct scsi_qla_host and struct qla_hw_data
4432 * members.
4433 */
4434void
4435qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4436{
4437 if (!qla_tgt_mode_enabled(vha))
4438 return;
4439
4440 mutex_init(&ha->tgt.tgt_mutex);
4441 mutex_init(&ha->tgt.tgt_host_action_mutex);
4442
4443 qlt_clear_mode(vha);
4444
4445 /*
4446 * NOTE: Currently the value is kept the same for <24xx and
4447 * >=24xx ISPs. If it is necessary to change it,
4448 * the check should be added for specific ISPs,
4449 * assigning the value appropriately.
4450 */
4451 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4452}
4453
4454void
4455qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4456{
4457 /*
4458 * FC-4 Feature bit 0 indicates target functionality to the name server.
4459 */
4460 if (qla_tgt_mode_enabled(vha)) {
4461 if (qla_ini_mode_enabled(vha))
4462 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4463 else
4464 ct_req->req.rff_id.fc4_feature = BIT_0;
4465 } else if (qla_ini_mode_enabled(vha)) {
4466 ct_req->req.rff_id.fc4_feature = BIT_1;
4467 }
4468}
4469
4470/*
4471 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4472 * @ha: HA context
4473 *
4474 * Beginning of ATIO ring has initialization control block already built
4475 * by nvram config routine.
4476 *
4477 * Returns 0 on success.
4478 */
4479void
4480qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4481{
4482 struct qla_hw_data *ha = vha->hw;
4483 uint16_t cnt;
4484 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4485
4486 if (!qla_tgt_mode_enabled(vha))
4487 return;
4488
4489 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4490 pkt->u.raw.signature = ATIO_PROCESSED;
4491 pkt++;
4492 }
4493
4494}
4495
4496/*
4497 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4498 * @ha: SCSI driver HA context
4499 */
4500void
4501qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4502{
4503 struct qla_hw_data *ha = vha->hw;
2d70c103
NB		 4504 struct atio_from_isp *pkt;
4505 int cnt, i;
4506
4507 if (!vha->flags.online)
4508 return;
4509
4510 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4511 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4512 cnt = pkt->u.raw.entry_count;
4513
4514 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4515
4516 for (i = 0; i < cnt; i++) {
4517 ha->tgt.atio_ring_index++;
4518 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4519 ha->tgt.atio_ring_index = 0;
4520 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4521 } else
4522 ha->tgt.atio_ring_ptr++;
4523
4524 pkt->u.raw.signature = ATIO_PROCESSED;
4525 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4526 }
4527 wmb();
4528 }
4529
4530 /* Adjust ring index */
aa230bc5 4531 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
2d70c103
NB		 4532}
4533
4534void
aa230bc5 4535qlt_24xx_config_rings(struct scsi_qla_host *vha)
2d70c103
NB		 4536{
4537 struct qla_hw_data *ha = vha->hw;
aa230bc5
AE		 4538 if (!QLA_TGT_MODE_ENABLED())
4539 return;
2d70c103 4540
aa230bc5
AE		 4541 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4542 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4543 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4544
4545 if (IS_ATIO_MSIX_CAPABLE(ha)) {
4546 struct qla_msix_entry *msix = &ha->msix_entries[2];
4547 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4548
4549 icb->msix_atio = cpu_to_le16(msix->entry);
4550 ql_dbg(ql_dbg_init, vha, 0xf072,
4551 "Registering ICB vector 0x%x for atio que.\n",
4552 msix->entry);
2d70c103
NB		 4553 }
4554}
4555
4556void
4557qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4558{
4559 struct qla_hw_data *ha = vha->hw;
4560
4561 if (qla_tgt_mode_enabled(vha)) {
4562 if (!ha->tgt.saved_set) {
4563 /* We save only once */
4564 ha->tgt.saved_exchange_count = nv->exchange_count;
4565 ha->tgt.saved_firmware_options_1 =
4566 nv->firmware_options_1;
4567 ha->tgt.saved_firmware_options_2 =
4568 nv->firmware_options_2;
4569 ha->tgt.saved_firmware_options_3 =
4570 nv->firmware_options_3;
4571 ha->tgt.saved_set = 1;
4572 }
4573
4574 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4575
4576 /* Enable target mode */
4577 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4578
4579 /* Disable ini mode, if requested */
4580 if (!qla_ini_mode_enabled(vha))
4581 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4582
4583 /* Disable Full Login after LIP */
4584 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4585 /* Enable initial LIP */
4586 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4587 /* Enable FC tapes support */
4588 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4589 /* Disable Full Login after LIP */
4590 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4591 /* Enable target PRLI control */
4592 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4593 } else {
4594 if (ha->tgt.saved_set) {
4595 nv->exchange_count = ha->tgt.saved_exchange_count;
4596 nv->firmware_options_1 =
4597 ha->tgt.saved_firmware_options_1;
4598 nv->firmware_options_2 =
4599 ha->tgt.saved_firmware_options_2;
4600 nv->firmware_options_3 =
4601 ha->tgt.saved_firmware_options_3;
4602 }
4603 return;
4604 }
4605
4606 /* out-of-order frames reassembly */
4607 nv->firmware_options_3 |= BIT_6|BIT_9;
4608
4609 if (ha->tgt.enable_class_2) {
4610 if (vha->flags.init_done)
4611 fc_host_supported_classes(vha->host) =
4612 FC_COS_CLASS2 | FC_COS_CLASS3;
4613
4614 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4615 } else {
4616 if (vha->flags.init_done)
4617 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4618
4619 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4620 }
4621}
4622
4623void
4624qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4625 struct init_cb_24xx *icb)
4626{
4627 struct qla_hw_data *ha = vha->hw;
4628
4629 if (ha->tgt.node_name_set) {
4630 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4631 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4632 }
4633}
4634
aa230bc5
AE		 4635void
4636qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4637{
4638 struct qla_hw_data *ha = vha->hw;
4639
4640 if (!QLA_TGT_MODE_ENABLED())
4641 return;
4642
4643 if (qla_tgt_mode_enabled(vha)) {
4644 if (!ha->tgt.saved_set) {
4645 /* We save only once */
4646 ha->tgt.saved_exchange_count = nv->exchange_count;
4647 ha->tgt.saved_firmware_options_1 =
4648 nv->firmware_options_1;
4649 ha->tgt.saved_firmware_options_2 =
4650 nv->firmware_options_2;
4651 ha->tgt.saved_firmware_options_3 =
4652 nv->firmware_options_3;
4653 ha->tgt.saved_set = 1;
4654 }
4655
4656 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4657
4658 /* Enable target mode */
4659 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4660
4661 /* Disable ini mode, if requested */
4662 if (!qla_ini_mode_enabled(vha))
4663 nv->firmware_options_1 |=
4664 __constant_cpu_to_le32(BIT_5);
4665
4666 /* Disable Full Login after LIP */
4667 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4668 /* Enable initial LIP */
4669 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4670 /* Enable FC tapes support */
4671 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4672 /* Disable Full Login after LIP */
4673 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4674 /* Enable target PRLI control */
4675 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4676 } else {
4677 if (ha->tgt.saved_set) {
4678 nv->exchange_count = ha->tgt.saved_exchange_count;
4679 nv->firmware_options_1 =
4680 ha->tgt.saved_firmware_options_1;
4681 nv->firmware_options_2 =
4682 ha->tgt.saved_firmware_options_2;
4683 nv->firmware_options_3 =
4684 ha->tgt.saved_firmware_options_3;
4685 }
4686 return;
4687 }
4688
4689 /* out-of-order frames reassembly */
4690 nv->firmware_options_3 |= BIT_6|BIT_9;
4691
4692 if (ha->tgt.enable_class_2) {
4693 if (vha->flags.init_done)
4694 fc_host_supported_classes(vha->host) =
4695 FC_COS_CLASS2 | FC_COS_CLASS3;
4696
4697 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4698 } else {
4699 if (vha->flags.init_done)
4700 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4701
4702 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4703 }
4704}
4705
4706void
4707qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4708 struct init_cb_81xx *icb)
4709{
4710 struct qla_hw_data *ha = vha->hw;
4711
4712 if (!QLA_TGT_MODE_ENABLED())
4713 return;
4714
4715 if (ha->tgt.node_name_set) {
4716 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4717 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4718 }
4719}
4720
4721void
4722qlt_83xx_iospace_config(struct qla_hw_data *ha)
4723{
4724 if (!QLA_TGT_MODE_ENABLED())
4725 return;
4726
4727 ha->msix_count += 1; /* For ATIO Q */
4728}
4729
2d70c103
NB		 4730int
4731qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4732 struct sts_entry_24xx *pkt)
4733{
4734 switch (pkt->entry_type) {
4735 case ABTS_RECV_24XX:
4736 case ABTS_RESP_24XX:
4737 case CTIO_TYPE7:
4738 case NOTIFY_ACK_TYPE:
4739 return 1;
4740 default:
4741 return 0;
4742 }
4743}
4744
4745void
4746qlt_modify_vp_config(struct scsi_qla_host *vha,
4747 struct vp_config_entry_24xx *vpmod)
4748{
4749 if (qla_tgt_mode_enabled(vha))
4750 vpmod->options_idx1 &= ~BIT_5;
4751 /* Disable ini mode, if requested */
4752 if (!qla_ini_mode_enabled(vha))
4753 vpmod->options_idx1 &= ~BIT_4;
4754}
4755
4756void
4757qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4758{
4759 if (!QLA_TGT_MODE_ENABLED())
4760 return;
4761
aa230bc5
AE		 4762 if (ha->mqenable || IS_QLA83XX(ha)) {
4763 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4764 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4765 } else {
4766 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4767 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4768 }
4769
2d70c103
NB		 4770 mutex_init(&ha->tgt.tgt_mutex);
4771 mutex_init(&ha->tgt.tgt_host_action_mutex);
4772 qlt_clear_mode(base_vha);
4773}
4774
aa230bc5
AE		 4775irqreturn_t
4776qla83xx_msix_atio_q(int irq, void *dev_id)
4777{
4778 struct rsp_que *rsp;
4779 scsi_qla_host_t *vha;
4780 struct qla_hw_data *ha;
4781 unsigned long flags;
4782
4783 rsp = (struct rsp_que *) dev_id;
4784 ha = rsp->hw;
4785 vha = pci_get_drvdata(ha->pdev);
4786
4787 spin_lock_irqsave(&ha->hardware_lock, flags);
4788
4789 qlt_24xx_process_atio_queue(vha);
4790 qla24xx_process_response_queue(vha, rsp);
4791
4792 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4793
4794 return IRQ_HANDLED;
4795}
4796
2d70c103
NB		 4797int
4798qlt_mem_alloc(struct qla_hw_data *ha)
4799{
4800 if (!QLA_TGT_MODE_ENABLED())
4801 return 0;
4802
4803 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4804 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4805 if (!ha->tgt.tgt_vp_map)
4806 return -ENOMEM;
4807
4808 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4809 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4810 &ha->tgt.atio_dma, GFP_KERNEL);
4811 if (!ha->tgt.atio_ring) {
4812 kfree(ha->tgt.tgt_vp_map);
4813 return -ENOMEM;
4814 }
4815 return 0;
4816}
4817
4818void
4819qlt_mem_free(struct qla_hw_data *ha)
4820{
4821 if (!QLA_TGT_MODE_ENABLED())
4822 return;
4823
4824 if (ha->tgt.atio_ring) {
4825 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4826 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4827 ha->tgt.atio_dma);
4828 }
4829 kfree(ha->tgt.tgt_vp_map);
4830}
4831
4832/* vport_slock to be held by the caller */
4833void
4834qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4835{
4836 if (!QLA_TGT_MODE_ENABLED())
4837 return;
4838
4839 switch (cmd) {
4840 case SET_VP_IDX:
4841 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4842 break;
4843 case SET_AL_PA:
4844 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4845 break;
4846 case RESET_VP_IDX:
4847 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4848 break;
4849 case RESET_AL_PA:
4850 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4851 break;
4852 }
4853}
4854
4855static int __init qlt_parse_ini_mode(void)
4856{
4857 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4858 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4859 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4860 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4861 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4862 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4863 else
4864 return false;
4865
4866 return true;
4867}
4868
4869int __init qlt_init(void)
4870{
4871 int ret;
4872
4873 if (!qlt_parse_ini_mode()) {
4874 ql_log(ql_log_fatal, NULL, 0xe06b,
4875 "qlt_parse_ini_mode() failed\n");
4876 return -EINVAL;
4877 }
4878
4879 if (!QLA_TGT_MODE_ENABLED())
4880 return 0;
4881
4882 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4883 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4884 NULL);
4885 if (!qla_tgt_cmd_cachep) {
4886 ql_log(ql_log_fatal, NULL, 0xe06c,
4887 "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4888 return -ENOMEM;
4889 }
4890
4891 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4892 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4893 qla_tgt_mgmt_cmd), 0, NULL);
4894 if (!qla_tgt_mgmt_cmd_cachep) {
4895 ql_log(ql_log_fatal, NULL, 0xe06d,
4896 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4897 ret = -ENOMEM;
4898 goto out;
4899 }
4900
4901 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4902 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4903 if (!qla_tgt_mgmt_cmd_mempool) {
4904 ql_log(ql_log_fatal, NULL, 0xe06e,
4905 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4906 ret = -ENOMEM;
4907 goto out_mgmt_cmd_cachep;
4908 }
4909
4910 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4911 if (!qla_tgt_wq) {
4912 ql_log(ql_log_fatal, NULL, 0xe06f,
4913 "alloc_workqueue for qla_tgt_wq failed\n");
4914 ret = -ENOMEM;
4915 goto out_cmd_mempool;
4916 }
4917 /*
4918 * Return 1 to signal that initiator-mode is being disabled
4919 */
4920 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4921
4922out_cmd_mempool:
4923 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4924out_mgmt_cmd_cachep:
4925 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4926out:
4927 kmem_cache_destroy(qla_tgt_cmd_cachep);
4928 return ret;
4929}
4930
4931void qlt_exit(void)
4932{
4933 if (!QLA_TGT_MODE_ENABLED())
4934 return;
4935
4936 destroy_workqueue(qla_tgt_wq);
4937 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4938 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4939 kmem_cache_destroy(qla_tgt_cmd_cachep);
4940}
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