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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...
[deliverable/linux.git] / drivers / scsi / qla2xxx / qla_target.c
1 /*
2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
3 *
4 * based on qla2x00t.c code:
5 *
6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
7 * Copyright (C) 2004 - 2005 Leonid Stoljar
8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
9 * Copyright (C) 2006 - 2010 ID7 Ltd.
10 *
11 * Forward port and refactoring to modern qla2xxx and target/configfs
12 *
13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation, version 2
18 * of the License.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 */
25
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/blkdev.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/delay.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <asm/unaligned.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_tcq.h>
39 #include <target/target_core_base.h>
40 #include <target/target_core_fabric.h>
41
42 #include "qla_def.h"
43 #include "qla_target.h"
44
45 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
46 module_param(qlini_mode, charp, S_IRUGO);
47 MODULE_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
55 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
56
57 /*
58 * From scsi/fc/fc_fcp.h
59 */
60 enum 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 */
76 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */
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 */
95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
96 struct atio_from_isp *pkt);
97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
99 int fn, void *iocb, int flags);
100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
101 *cmd, struct atio_from_isp *atio, int ha_locked);
102 static 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 */
107 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
108 static mempool_t *qla_tgt_mgmt_cmd_mempool;
109 static struct workqueue_struct *qla_tgt_wq;
110 static DEFINE_MUTEX(qla_tgt_mutex);
111 static LIST_HEAD(qla_tgt_glist);
112
113 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
114 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
115 struct qla_tgt *tgt,
116 const uint8_t *port_name)
117 {
118 struct qla_tgt_sess *sess;
119
120 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
121 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
122 return sess;
123 }
124
125 return NULL;
126 }
127
128 /* Might release hw lock, then reaquire!! */
129 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
130 {
131 /* Send marker if required */
132 if (unlikely(vha->marker_needed != 0)) {
133 int rc = qla2x00_issue_marker(vha, vha_locked);
134 if (rc != QLA_SUCCESS) {
135 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
136 "qla_target(%d): issue_marker() failed\n",
137 vha->vp_idx);
138 }
139 return rc;
140 }
141 return QLA_SUCCESS;
142 }
143
144 static inline
145 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
146 uint8_t *d_id)
147 {
148 struct qla_hw_data *ha = vha->hw;
149 uint8_t vp_idx;
150
151 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
152 return NULL;
153
154 if (vha->d_id.b.al_pa == d_id[2])
155 return vha;
156
157 BUG_ON(ha->tgt.tgt_vp_map == NULL);
158 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
159 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
160 return ha->tgt.tgt_vp_map[vp_idx].vha;
161
162 return NULL;
163 }
164
165 static inline
166 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
167 uint16_t vp_idx)
168 {
169 struct qla_hw_data *ha = vha->hw;
170
171 if (vha->vp_idx == vp_idx)
172 return vha;
173
174 BUG_ON(ha->tgt.tgt_vp_map == NULL);
175 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
176 return ha->tgt.tgt_vp_map[vp_idx].vha;
177
178 return NULL;
179 }
180
181 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
182 struct atio_from_isp *atio)
183 {
184 ql_dbg(ql_dbg_tgt, vha, 0xe072,
185 "%s: qla_target(%d): type %x ox_id %04x\n",
186 __func__, vha->vp_idx, atio->u.raw.entry_type,
187 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
188
189 switch (atio->u.raw.entry_type) {
190 case ATIO_TYPE7:
191 {
192 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
193 atio->u.isp24.fcp_hdr.d_id);
194 if (unlikely(NULL == host)) {
195 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
196 "qla_target(%d): Received ATIO_TYPE7 "
197 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
198 atio->u.isp24.fcp_hdr.d_id[0],
199 atio->u.isp24.fcp_hdr.d_id[1],
200 atio->u.isp24.fcp_hdr.d_id[2]);
201 break;
202 }
203 qlt_24xx_atio_pkt(host, atio);
204 break;
205 }
206
207 case IMMED_NOTIFY_TYPE:
208 {
209 struct scsi_qla_host *host = vha;
210 struct imm_ntfy_from_isp *entry =
211 (struct imm_ntfy_from_isp *)atio;
212
213 if ((entry->u.isp24.vp_index != 0xFF) &&
214 (entry->u.isp24.nport_handle != 0xFFFF)) {
215 host = qlt_find_host_by_vp_idx(vha,
216 entry->u.isp24.vp_index);
217 if (unlikely(!host)) {
218 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
219 "qla_target(%d): Received "
220 "ATIO (IMMED_NOTIFY_TYPE) "
221 "with unknown vp_index %d\n",
222 vha->vp_idx, entry->u.isp24.vp_index);
223 break;
224 }
225 }
226 qlt_24xx_atio_pkt(host, atio);
227 break;
228 }
229
230 default:
231 ql_dbg(ql_dbg_tgt, vha, 0xe040,
232 "qla_target(%d): Received unknown ATIO atio "
233 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
234 break;
235 }
236
237 return;
238 }
239
240 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
241 {
242 switch (pkt->entry_type) {
243 case CTIO_CRC2:
244 ql_dbg(ql_dbg_tgt, vha, 0xe073,
245 "qla_target(%d):%s: CRC2 Response pkt\n",
246 vha->vp_idx, __func__);
247 case CTIO_TYPE7:
248 {
249 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
250 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
251 entry->vp_index);
252 if (unlikely(!host)) {
253 ql_dbg(ql_dbg_tgt, vha, 0xe041,
254 "qla_target(%d): Response pkt (CTIO_TYPE7) "
255 "received, with unknown vp_index %d\n",
256 vha->vp_idx, entry->vp_index);
257 break;
258 }
259 qlt_response_pkt(host, pkt);
260 break;
261 }
262
263 case IMMED_NOTIFY_TYPE:
264 {
265 struct scsi_qla_host *host = vha;
266 struct imm_ntfy_from_isp *entry =
267 (struct imm_ntfy_from_isp *)pkt;
268
269 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
270 if (unlikely(!host)) {
271 ql_dbg(ql_dbg_tgt, vha, 0xe042,
272 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
273 "received, with unknown vp_index %d\n",
274 vha->vp_idx, entry->u.isp24.vp_index);
275 break;
276 }
277 qlt_response_pkt(host, pkt);
278 break;
279 }
280
281 case NOTIFY_ACK_TYPE:
282 {
283 struct scsi_qla_host *host = vha;
284 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
285
286 if (0xFF != entry->u.isp24.vp_index) {
287 host = qlt_find_host_by_vp_idx(vha,
288 entry->u.isp24.vp_index);
289 if (unlikely(!host)) {
290 ql_dbg(ql_dbg_tgt, vha, 0xe043,
291 "qla_target(%d): Response "
292 "pkt (NOTIFY_ACK_TYPE) "
293 "received, with unknown "
294 "vp_index %d\n", vha->vp_idx,
295 entry->u.isp24.vp_index);
296 break;
297 }
298 }
299 qlt_response_pkt(host, pkt);
300 break;
301 }
302
303 case ABTS_RECV_24XX:
304 {
305 struct abts_recv_from_24xx *entry =
306 (struct abts_recv_from_24xx *)pkt;
307 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
308 entry->vp_index);
309 if (unlikely(!host)) {
310 ql_dbg(ql_dbg_tgt, vha, 0xe044,
311 "qla_target(%d): Response pkt "
312 "(ABTS_RECV_24XX) received, with unknown "
313 "vp_index %d\n", vha->vp_idx, entry->vp_index);
314 break;
315 }
316 qlt_response_pkt(host, pkt);
317 break;
318 }
319
320 case ABTS_RESP_24XX:
321 {
322 struct abts_resp_to_24xx *entry =
323 (struct abts_resp_to_24xx *)pkt;
324 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
325 entry->vp_index);
326 if (unlikely(!host)) {
327 ql_dbg(ql_dbg_tgt, vha, 0xe045,
328 "qla_target(%d): Response pkt "
329 "(ABTS_RECV_24XX) received, with unknown "
330 "vp_index %d\n", vha->vp_idx, entry->vp_index);
331 break;
332 }
333 qlt_response_pkt(host, pkt);
334 break;
335 }
336
337 default:
338 qlt_response_pkt(vha, pkt);
339 break;
340 }
341
342 }
343
344 static void qlt_free_session_done(struct work_struct *work)
345 {
346 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
347 free_work);
348 struct qla_tgt *tgt = sess->tgt;
349 struct scsi_qla_host *vha = sess->vha;
350 struct qla_hw_data *ha = vha->hw;
351
352 BUG_ON(!tgt);
353 /*
354 * Release the target session for FC Nexus from fabric module code.
355 */
356 if (sess->se_sess != NULL)
357 ha->tgt.tgt_ops->free_session(sess);
358
359 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
360 "Unregistration of sess %p finished\n", sess);
361
362 kfree(sess);
363 /*
364 * We need to protect against race, when tgt is freed before or
365 * inside wake_up()
366 */
367 tgt->sess_count--;
368 if (tgt->sess_count == 0)
369 wake_up_all(&tgt->waitQ);
370 }
371
372 /* ha->hardware_lock supposed to be held on entry */
373 void qlt_unreg_sess(struct qla_tgt_sess *sess)
374 {
375 struct scsi_qla_host *vha = sess->vha;
376
377 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
378
379 list_del(&sess->sess_list_entry);
380 if (sess->deleted)
381 list_del(&sess->del_list_entry);
382
383 INIT_WORK(&sess->free_work, qlt_free_session_done);
384 schedule_work(&sess->free_work);
385 }
386 EXPORT_SYMBOL(qlt_unreg_sess);
387
388 /* ha->hardware_lock supposed to be held on entry */
389 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
390 {
391 struct qla_hw_data *ha = vha->hw;
392 struct qla_tgt_sess *sess = NULL;
393 uint32_t unpacked_lun, lun = 0;
394 uint16_t loop_id;
395 int res = 0;
396 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
397 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
398
399 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
400 if (loop_id == 0xFFFF) {
401 #if 0 /* FIXME: Re-enable Global event handling.. */
402 /* Global event */
403 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
404 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
405 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
406 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
407 typeof(*sess), sess_list_entry);
408 switch (mcmd) {
409 case QLA_TGT_NEXUS_LOSS_SESS:
410 mcmd = QLA_TGT_NEXUS_LOSS;
411 break;
412 case QLA_TGT_ABORT_ALL_SESS:
413 mcmd = QLA_TGT_ABORT_ALL;
414 break;
415 case QLA_TGT_NEXUS_LOSS:
416 case QLA_TGT_ABORT_ALL:
417 break;
418 default:
419 ql_dbg(ql_dbg_tgt, vha, 0xe046,
420 "qla_target(%d): Not allowed "
421 "command %x in %s", vha->vp_idx,
422 mcmd, __func__);
423 sess = NULL;
424 break;
425 }
426 } else
427 sess = NULL;
428 #endif
429 } else {
430 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
431 }
432
433 ql_dbg(ql_dbg_tgt, vha, 0xe000,
434 "Using sess for qla_tgt_reset: %p\n", sess);
435 if (!sess) {
436 res = -ESRCH;
437 return res;
438 }
439
440 ql_dbg(ql_dbg_tgt, vha, 0xe047,
441 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
442 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
443 mcmd, loop_id);
444
445 lun = a->u.isp24.fcp_cmnd.lun;
446 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
447
448 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
449 iocb, QLA24XX_MGMT_SEND_NACK);
450 }
451
452 /* ha->hardware_lock supposed to be held on entry */
453 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
454 bool immediate)
455 {
456 struct qla_tgt *tgt = sess->tgt;
457 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
458
459 if (sess->deleted)
460 return;
461
462 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
463 "Scheduling sess %p for deletion\n", sess);
464 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
465 sess->deleted = 1;
466
467 if (immediate)
468 dev_loss_tmo = 0;
469
470 sess->expires = jiffies + dev_loss_tmo * HZ;
471
472 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
473 "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
474 "deletion in %u secs (expires: %lu) immed: %d\n",
475 sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
476 sess->expires, immediate);
477
478 if (immediate)
479 schedule_delayed_work(&tgt->sess_del_work, 0);
480 else
481 schedule_delayed_work(&tgt->sess_del_work,
482 sess->expires - jiffies);
483 }
484
485 /* ha->hardware_lock supposed to be held on entry */
486 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
487 {
488 struct qla_tgt_sess *sess;
489
490 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
491 qlt_schedule_sess_for_deletion(sess, true);
492
493 /* At this point tgt could be already dead */
494 }
495
496 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
497 uint16_t *loop_id)
498 {
499 struct qla_hw_data *ha = vha->hw;
500 dma_addr_t gid_list_dma;
501 struct gid_list_info *gid_list;
502 char *id_iter;
503 int res, rc, i;
504 uint16_t entries;
505
506 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
507 &gid_list_dma, GFP_KERNEL);
508 if (!gid_list) {
509 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
510 "qla_target(%d): DMA Alloc failed of %u\n",
511 vha->vp_idx, qla2x00_gid_list_size(ha));
512 return -ENOMEM;
513 }
514
515 /* Get list of logged in devices */
516 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
517 if (rc != QLA_SUCCESS) {
518 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
519 "qla_target(%d): get_id_list() failed: %x\n",
520 vha->vp_idx, rc);
521 res = -1;
522 goto out_free_id_list;
523 }
524
525 id_iter = (char *)gid_list;
526 res = -1;
527 for (i = 0; i < entries; i++) {
528 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
529 if ((gid->al_pa == s_id[2]) &&
530 (gid->area == s_id[1]) &&
531 (gid->domain == s_id[0])) {
532 *loop_id = le16_to_cpu(gid->loop_id);
533 res = 0;
534 break;
535 }
536 id_iter += ha->gid_list_info_size;
537 }
538
539 out_free_id_list:
540 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
541 gid_list, gid_list_dma);
542 return res;
543 }
544
545 /* ha->hardware_lock supposed to be held on entry */
546 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
547 {
548 BUG_ON(!sess->deleted);
549
550 list_del(&sess->del_list_entry);
551 sess->deleted = 0;
552 }
553
554 static void qlt_del_sess_work_fn(struct delayed_work *work)
555 {
556 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
557 sess_del_work);
558 struct scsi_qla_host *vha = tgt->vha;
559 struct qla_hw_data *ha = vha->hw;
560 struct qla_tgt_sess *sess;
561 unsigned long flags, elapsed;
562
563 spin_lock_irqsave(&ha->hardware_lock, flags);
564 while (!list_empty(&tgt->del_sess_list)) {
565 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
566 del_list_entry);
567 elapsed = jiffies;
568 if (time_after_eq(elapsed, sess->expires)) {
569 qlt_undelete_sess(sess);
570
571 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
572 "Timeout: sess %p about to be deleted\n",
573 sess);
574 ha->tgt.tgt_ops->shutdown_sess(sess);
575 ha->tgt.tgt_ops->put_sess(sess);
576 } else {
577 schedule_delayed_work(&tgt->sess_del_work,
578 sess->expires - elapsed);
579 break;
580 }
581 }
582 spin_unlock_irqrestore(&ha->hardware_lock, flags);
583 }
584
585 /*
586 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
587 * Caller must put it.
588 */
589 static struct qla_tgt_sess *qlt_create_sess(
590 struct scsi_qla_host *vha,
591 fc_port_t *fcport,
592 bool local)
593 {
594 struct qla_hw_data *ha = vha->hw;
595 struct qla_tgt_sess *sess;
596 unsigned long flags;
597 unsigned char be_sid[3];
598
599 /* Check to avoid double sessions */
600 spin_lock_irqsave(&ha->hardware_lock, flags);
601 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
602 sess_list_entry) {
603 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
604 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
605 "Double sess %p found (s_id %x:%x:%x, "
606 "loop_id %d), updating to d_id %x:%x:%x, "
607 "loop_id %d", sess, sess->s_id.b.domain,
608 sess->s_id.b.al_pa, sess->s_id.b.area,
609 sess->loop_id, fcport->d_id.b.domain,
610 fcport->d_id.b.al_pa, fcport->d_id.b.area,
611 fcport->loop_id);
612
613 if (sess->deleted)
614 qlt_undelete_sess(sess);
615
616 kref_get(&sess->se_sess->sess_kref);
617 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
618 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
619
620 if (sess->local && !local)
621 sess->local = 0;
622 spin_unlock_irqrestore(&ha->hardware_lock, flags);
623
624 return sess;
625 }
626 }
627 spin_unlock_irqrestore(&ha->hardware_lock, flags);
628
629 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
630 if (!sess) {
631 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
632 "qla_target(%u): session allocation failed, all commands "
633 "from port %8phC will be refused", vha->vp_idx,
634 fcport->port_name);
635
636 return NULL;
637 }
638 sess->tgt = vha->vha_tgt.qla_tgt;
639 sess->vha = vha;
640 sess->s_id = fcport->d_id;
641 sess->loop_id = fcport->loop_id;
642 sess->local = local;
643
644 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
645 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
646 sess, vha->vha_tgt.qla_tgt);
647
648 be_sid[0] = sess->s_id.b.domain;
649 be_sid[1] = sess->s_id.b.area;
650 be_sid[2] = sess->s_id.b.al_pa;
651 /*
652 * Determine if this fc_port->port_name is allowed to access
653 * target mode using explict NodeACLs+MappedLUNs, or using
654 * TPG demo mode. If this is successful a target mode FC nexus
655 * is created.
656 */
657 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
658 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
659 kfree(sess);
660 return NULL;
661 }
662 /*
663 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
664 * access across ->hardware_lock reaquire.
665 */
666 kref_get(&sess->se_sess->sess_kref);
667
668 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
669 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
670 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
671
672 spin_lock_irqsave(&ha->hardware_lock, flags);
673 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
674 vha->vha_tgt.qla_tgt->sess_count++;
675 spin_unlock_irqrestore(&ha->hardware_lock, flags);
676
677 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
678 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
679 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
680 vha->vp_idx, local ? "local " : "", fcport->port_name,
681 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
682 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
683
684 return sess;
685 }
686
687 /*
688 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
689 */
690 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
691 {
692 struct qla_hw_data *ha = vha->hw;
693 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
694 struct qla_tgt_sess *sess;
695 unsigned long flags;
696
697 if (!vha->hw->tgt.tgt_ops)
698 return;
699
700 if (!tgt || (fcport->port_type != FCT_INITIATOR))
701 return;
702
703 if (qla_ini_mode_enabled(vha))
704 return;
705
706 spin_lock_irqsave(&ha->hardware_lock, flags);
707 if (tgt->tgt_stop) {
708 spin_unlock_irqrestore(&ha->hardware_lock, flags);
709 return;
710 }
711 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
712 if (!sess) {
713 spin_unlock_irqrestore(&ha->hardware_lock, flags);
714
715 mutex_lock(&vha->vha_tgt.tgt_mutex);
716 sess = qlt_create_sess(vha, fcport, false);
717 mutex_unlock(&vha->vha_tgt.tgt_mutex);
718
719 spin_lock_irqsave(&ha->hardware_lock, flags);
720 } else {
721 kref_get(&sess->se_sess->sess_kref);
722
723 if (sess->deleted) {
724 qlt_undelete_sess(sess);
725
726 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
727 "qla_target(%u): %ssession for port %8phC "
728 "(loop ID %d) reappeared\n", vha->vp_idx,
729 sess->local ? "local " : "", sess->port_name,
730 sess->loop_id);
731
732 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
733 "Reappeared sess %p\n", sess);
734 }
735 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
736 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
737 }
738
739 if (sess && sess->local) {
740 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
741 "qla_target(%u): local session for "
742 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
743 fcport->port_name, sess->loop_id);
744 sess->local = 0;
745 }
746 ha->tgt.tgt_ops->put_sess(sess);
747 spin_unlock_irqrestore(&ha->hardware_lock, flags);
748 }
749
750 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
751 {
752 struct qla_hw_data *ha = vha->hw;
753 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
754 struct qla_tgt_sess *sess;
755 unsigned long flags;
756
757 if (!vha->hw->tgt.tgt_ops)
758 return;
759
760 if (!tgt || (fcport->port_type != FCT_INITIATOR))
761 return;
762
763 spin_lock_irqsave(&ha->hardware_lock, flags);
764 if (tgt->tgt_stop) {
765 spin_unlock_irqrestore(&ha->hardware_lock, flags);
766 return;
767 }
768 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
769 if (!sess) {
770 spin_unlock_irqrestore(&ha->hardware_lock, flags);
771 return;
772 }
773
774 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
775
776 sess->local = 1;
777 qlt_schedule_sess_for_deletion(sess, false);
778 spin_unlock_irqrestore(&ha->hardware_lock, flags);
779 }
780
781 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
782 {
783 struct qla_hw_data *ha = tgt->ha;
784 unsigned long flags;
785 int res;
786 /*
787 * We need to protect against race, when tgt is freed before or
788 * inside wake_up()
789 */
790 spin_lock_irqsave(&ha->hardware_lock, flags);
791 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
792 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
793 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
794 res = (tgt->sess_count == 0);
795 spin_unlock_irqrestore(&ha->hardware_lock, flags);
796
797 return res;
798 }
799
800 /* Called by tcm_qla2xxx configfs code */
801 int qlt_stop_phase1(struct qla_tgt *tgt)
802 {
803 struct scsi_qla_host *vha = tgt->vha;
804 struct qla_hw_data *ha = tgt->ha;
805 unsigned long flags;
806
807 mutex_lock(&qla_tgt_mutex);
808 if (!vha->fc_vport) {
809 struct Scsi_Host *sh = vha->host;
810 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
811 bool npiv_vports;
812
813 spin_lock_irqsave(sh->host_lock, flags);
814 npiv_vports = (fc_host->npiv_vports_inuse);
815 spin_unlock_irqrestore(sh->host_lock, flags);
816
817 if (npiv_vports) {
818 mutex_unlock(&qla_tgt_mutex);
819 return -EPERM;
820 }
821 }
822 if (tgt->tgt_stop || tgt->tgt_stopped) {
823 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
824 "Already in tgt->tgt_stop or tgt_stopped state\n");
825 mutex_unlock(&qla_tgt_mutex);
826 return -EPERM;
827 }
828
829 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
830 vha->host_no, vha);
831 /*
832 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
833 * Lock is needed, because we still can get an incoming packet.
834 */
835 mutex_lock(&vha->vha_tgt.tgt_mutex);
836 spin_lock_irqsave(&ha->hardware_lock, flags);
837 tgt->tgt_stop = 1;
838 qlt_clear_tgt_db(tgt, true);
839 spin_unlock_irqrestore(&ha->hardware_lock, flags);
840 mutex_unlock(&vha->vha_tgt.tgt_mutex);
841 mutex_unlock(&qla_tgt_mutex);
842
843 flush_delayed_work(&tgt->sess_del_work);
844
845 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
846 "Waiting for sess works (tgt %p)", tgt);
847 spin_lock_irqsave(&tgt->sess_work_lock, flags);
848 while (!list_empty(&tgt->sess_works_list)) {
849 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
850 flush_scheduled_work();
851 spin_lock_irqsave(&tgt->sess_work_lock, flags);
852 }
853 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
854
855 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
856 "Waiting for tgt %p: list_empty(sess_list)=%d "
857 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
858 tgt->sess_count);
859
860 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
861
862 /* Big hammer */
863 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
864 qlt_disable_vha(vha);
865
866 /* Wait for sessions to clear out (just in case) */
867 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
868 return 0;
869 }
870 EXPORT_SYMBOL(qlt_stop_phase1);
871
872 /* Called by tcm_qla2xxx configfs code */
873 void qlt_stop_phase2(struct qla_tgt *tgt)
874 {
875 struct qla_hw_data *ha = tgt->ha;
876 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
877 unsigned long flags;
878
879 if (tgt->tgt_stopped) {
880 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
881 "Already in tgt->tgt_stopped state\n");
882 dump_stack();
883 return;
884 }
885
886 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
887 "Waiting for %d IRQ commands to complete (tgt %p)",
888 tgt->irq_cmd_count, tgt);
889
890 mutex_lock(&vha->vha_tgt.tgt_mutex);
891 spin_lock_irqsave(&ha->hardware_lock, flags);
892 while (tgt->irq_cmd_count != 0) {
893 spin_unlock_irqrestore(&ha->hardware_lock, flags);
894 udelay(2);
895 spin_lock_irqsave(&ha->hardware_lock, flags);
896 }
897 tgt->tgt_stop = 0;
898 tgt->tgt_stopped = 1;
899 spin_unlock_irqrestore(&ha->hardware_lock, flags);
900 mutex_unlock(&vha->vha_tgt.tgt_mutex);
901
902 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
903 tgt);
904 }
905 EXPORT_SYMBOL(qlt_stop_phase2);
906
907 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
908 static void qlt_release(struct qla_tgt *tgt)
909 {
910 scsi_qla_host_t *vha = tgt->vha;
911
912 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
913 qlt_stop_phase2(tgt);
914
915 vha->vha_tgt.qla_tgt = NULL;
916
917 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
918 "Release of tgt %p finished\n", tgt);
919
920 kfree(tgt);
921 }
922
923 /* ha->hardware_lock supposed to be held on entry */
924 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
925 const void *param, unsigned int param_size)
926 {
927 struct qla_tgt_sess_work_param *prm;
928 unsigned long flags;
929
930 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
931 if (!prm) {
932 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
933 "qla_target(%d): Unable to create session "
934 "work, command will be refused", 0);
935 return -ENOMEM;
936 }
937
938 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
939 "Scheduling work (type %d, prm %p)"
940 " to find session for param %p (size %d, tgt %p)\n",
941 type, prm, param, param_size, tgt);
942
943 prm->type = type;
944 memcpy(&prm->tm_iocb, param, param_size);
945
946 spin_lock_irqsave(&tgt->sess_work_lock, flags);
947 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
948 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
949
950 schedule_work(&tgt->sess_work);
951
952 return 0;
953 }
954
955 /*
956 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
957 */
958 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
959 struct imm_ntfy_from_isp *ntfy,
960 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
961 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
962 {
963 struct qla_hw_data *ha = vha->hw;
964 request_t *pkt;
965 struct nack_to_isp *nack;
966
967 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
968
969 /* Send marker if required */
970 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
971 return;
972
973 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
974 if (!pkt) {
975 ql_dbg(ql_dbg_tgt, vha, 0xe049,
976 "qla_target(%d): %s failed: unable to allocate "
977 "request packet\n", vha->vp_idx, __func__);
978 return;
979 }
980
981 if (vha->vha_tgt.qla_tgt != NULL)
982 vha->vha_tgt.qla_tgt->notify_ack_expected++;
983
984 pkt->entry_type = NOTIFY_ACK_TYPE;
985 pkt->entry_count = 1;
986
987 nack = (struct nack_to_isp *)pkt;
988 nack->ox_id = ntfy->ox_id;
989
990 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
991 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
992 nack->u.isp24.flags = ntfy->u.isp24.flags &
993 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
994 }
995 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
996 nack->u.isp24.status = ntfy->u.isp24.status;
997 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
998 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
999 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1000 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1001 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1002 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1003 nack->u.isp24.srr_reject_code = srr_reject_code;
1004 nack->u.isp24.srr_reject_code_expl = srr_explan;
1005 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1006
1007 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1008 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1009 vha->vp_idx, nack->u.isp24.status);
1010
1011 qla2x00_start_iocbs(vha, vha->req);
1012 }
1013
1014 /*
1015 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1016 */
1017 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1018 struct abts_recv_from_24xx *abts, uint32_t status,
1019 bool ids_reversed)
1020 {
1021 struct qla_hw_data *ha = vha->hw;
1022 struct abts_resp_to_24xx *resp;
1023 uint32_t f_ctl;
1024 uint8_t *p;
1025
1026 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1027 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1028 ha, abts, status);
1029
1030 /* Send marker if required */
1031 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1032 return;
1033
1034 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1035 if (!resp) {
1036 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1037 "qla_target(%d): %s failed: unable to allocate "
1038 "request packet", vha->vp_idx, __func__);
1039 return;
1040 }
1041
1042 resp->entry_type = ABTS_RESP_24XX;
1043 resp->entry_count = 1;
1044 resp->nport_handle = abts->nport_handle;
1045 resp->vp_index = vha->vp_idx;
1046 resp->sof_type = abts->sof_type;
1047 resp->exchange_address = abts->exchange_address;
1048 resp->fcp_hdr_le = abts->fcp_hdr_le;
1049 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1050 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1051 F_CTL_SEQ_INITIATIVE);
1052 p = (uint8_t *)&f_ctl;
1053 resp->fcp_hdr_le.f_ctl[0] = *p++;
1054 resp->fcp_hdr_le.f_ctl[1] = *p++;
1055 resp->fcp_hdr_le.f_ctl[2] = *p;
1056 if (ids_reversed) {
1057 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1058 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1059 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1060 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1061 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1062 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1063 } else {
1064 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1065 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1066 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1067 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1068 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1069 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1070 }
1071 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1072 if (status == FCP_TMF_CMPL) {
1073 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1074 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1075 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1076 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1077 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1078 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1079 } else {
1080 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1081 resp->payload.ba_rjt.reason_code =
1082 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1083 /* Other bytes are zero */
1084 }
1085
1086 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1087
1088 qla2x00_start_iocbs(vha, vha->req);
1089 }
1090
1091 /*
1092 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1093 */
1094 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1095 struct abts_resp_from_24xx_fw *entry)
1096 {
1097 struct ctio7_to_24xx *ctio;
1098
1099 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1100 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1101 /* Send marker if required */
1102 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1103 return;
1104
1105 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1106 if (ctio == NULL) {
1107 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1108 "qla_target(%d): %s failed: unable to allocate "
1109 "request packet\n", vha->vp_idx, __func__);
1110 return;
1111 }
1112
1113 /*
1114 * We've got on entrance firmware's response on by us generated
1115 * ABTS response. So, in it ID fields are reversed.
1116 */
1117
1118 ctio->entry_type = CTIO_TYPE7;
1119 ctio->entry_count = 1;
1120 ctio->nport_handle = entry->nport_handle;
1121 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1122 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1123 ctio->vp_index = vha->vp_idx;
1124 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1125 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1126 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1127 ctio->exchange_addr = entry->exchange_addr_to_abort;
1128 ctio->u.status1.flags =
1129 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1130 CTIO7_FLAGS_TERMINATE);
1131 ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1132
1133 qla2x00_start_iocbs(vha, vha->req);
1134
1135 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1136 FCP_TMF_CMPL, true);
1137 }
1138
1139 /* ha->hardware_lock supposed to be held on entry */
1140 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1141 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1142 {
1143 struct qla_hw_data *ha = vha->hw;
1144 struct se_session *se_sess = sess->se_sess;
1145 struct qla_tgt_mgmt_cmd *mcmd;
1146 struct se_cmd *se_cmd;
1147 u32 lun = 0;
1148 int rc;
1149 bool found_lun = false;
1150
1151 spin_lock(&se_sess->sess_cmd_lock);
1152 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1153 struct qla_tgt_cmd *cmd =
1154 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1155 if (cmd->tag == abts->exchange_addr_to_abort) {
1156 lun = cmd->unpacked_lun;
1157 found_lun = true;
1158 break;
1159 }
1160 }
1161 spin_unlock(&se_sess->sess_cmd_lock);
1162
1163 if (!found_lun)
1164 return -ENOENT;
1165
1166 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1167 "qla_target(%d): task abort (tag=%d)\n",
1168 vha->vp_idx, abts->exchange_addr_to_abort);
1169
1170 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1171 if (mcmd == NULL) {
1172 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1173 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1174 vha->vp_idx, __func__);
1175 return -ENOMEM;
1176 }
1177 memset(mcmd, 0, sizeof(*mcmd));
1178
1179 mcmd->sess = sess;
1180 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1181
1182 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1183 abts->exchange_addr_to_abort);
1184 if (rc != 0) {
1185 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1186 "qla_target(%d): tgt_ops->handle_tmr()"
1187 " failed: %d", vha->vp_idx, rc);
1188 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1189 return -EFAULT;
1190 }
1191
1192 return 0;
1193 }
1194
1195 /*
1196 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1197 */
1198 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1199 struct abts_recv_from_24xx *abts)
1200 {
1201 struct qla_hw_data *ha = vha->hw;
1202 struct qla_tgt_sess *sess;
1203 uint32_t tag = abts->exchange_addr_to_abort;
1204 uint8_t s_id[3];
1205 int rc;
1206
1207 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1208 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1209 "qla_target(%d): ABTS: Abort Sequence not "
1210 "supported\n", vha->vp_idx);
1211 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1212 return;
1213 }
1214
1215 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1216 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1217 "qla_target(%d): ABTS: Unknown Exchange "
1218 "Address received\n", vha->vp_idx);
1219 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1220 return;
1221 }
1222
1223 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1224 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1225 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1226 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1227 le32_to_cpu(abts->fcp_hdr_le.parameter));
1228
1229 s_id[0] = abts->fcp_hdr_le.s_id[2];
1230 s_id[1] = abts->fcp_hdr_le.s_id[1];
1231 s_id[2] = abts->fcp_hdr_le.s_id[0];
1232
1233 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1234 if (!sess) {
1235 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1236 "qla_target(%d): task abort for non-existant session\n",
1237 vha->vp_idx);
1238 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1239 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1240 if (rc != 0) {
1241 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1242 false);
1243 }
1244 return;
1245 }
1246
1247 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1248 if (rc != 0) {
1249 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1250 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1251 vha->vp_idx, rc);
1252 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1253 return;
1254 }
1255 }
1256
1257 /*
1258 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1259 */
1260 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1261 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1262 {
1263 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1264 struct ctio7_to_24xx *ctio;
1265
1266 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1267 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1268 ha, atio, resp_code);
1269
1270 /* Send marker if required */
1271 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1272 return;
1273
1274 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1275 if (ctio == NULL) {
1276 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1277 "qla_target(%d): %s failed: unable to allocate "
1278 "request packet\n", ha->vp_idx, __func__);
1279 return;
1280 }
1281
1282 ctio->entry_type = CTIO_TYPE7;
1283 ctio->entry_count = 1;
1284 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1285 ctio->nport_handle = mcmd->sess->loop_id;
1286 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1287 ctio->vp_index = ha->vp_idx;
1288 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1289 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1290 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1291 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1292 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1293 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1294 CTIO7_FLAGS_SEND_STATUS);
1295 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1296 ctio->u.status1.scsi_status =
1297 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1298 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1299 ctio->u.status1.sense_data[0] = resp_code;
1300
1301 qla2x00_start_iocbs(ha, ha->req);
1302 }
1303
1304 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1305 {
1306 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1307 }
1308 EXPORT_SYMBOL(qlt_free_mcmd);
1309
1310 /* callback from target fabric module code */
1311 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1312 {
1313 struct scsi_qla_host *vha = mcmd->sess->vha;
1314 struct qla_hw_data *ha = vha->hw;
1315 unsigned long flags;
1316
1317 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1318 "TM response mcmd (%p) status %#x state %#x",
1319 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1320
1321 spin_lock_irqsave(&ha->hardware_lock, flags);
1322 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1323 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1324 0, 0, 0, 0, 0, 0);
1325 else {
1326 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1327 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1328 mcmd->fc_tm_rsp, false);
1329 else
1330 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1331 mcmd->fc_tm_rsp);
1332 }
1333 /*
1334 * Make the callback for ->free_mcmd() to queue_work() and invoke
1335 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1336 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1337 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1338 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1339 * qlt_xmit_tm_rsp() returns here..
1340 */
1341 ha->tgt.tgt_ops->free_mcmd(mcmd);
1342 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1343 }
1344 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1345
1346 /* No locks */
1347 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1348 {
1349 struct qla_tgt_cmd *cmd = prm->cmd;
1350
1351 BUG_ON(cmd->sg_cnt == 0);
1352
1353 prm->sg = (struct scatterlist *)cmd->sg;
1354 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1355 cmd->sg_cnt, cmd->dma_data_direction);
1356 if (unlikely(prm->seg_cnt == 0))
1357 goto out_err;
1358
1359 prm->cmd->sg_mapped = 1;
1360
1361 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1362 /*
1363 * If greater than four sg entries then we need to allocate
1364 * the continuation entries
1365 */
1366 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1367 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1368 prm->tgt->datasegs_per_cmd,
1369 prm->tgt->datasegs_per_cont);
1370 } else {
1371 /* DIF */
1372 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1373 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1374 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1375 prm->tot_dsds = prm->seg_cnt;
1376 } else
1377 prm->tot_dsds = prm->seg_cnt;
1378
1379 if (cmd->prot_sg_cnt) {
1380 prm->prot_sg = cmd->prot_sg;
1381 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1382 cmd->prot_sg, cmd->prot_sg_cnt,
1383 cmd->dma_data_direction);
1384 if (unlikely(prm->prot_seg_cnt == 0))
1385 goto out_err;
1386
1387 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1388 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1389 /* Dif Bundling not support here */
1390 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1391 cmd->blk_sz);
1392 prm->tot_dsds += prm->prot_seg_cnt;
1393 } else
1394 prm->tot_dsds += prm->prot_seg_cnt;
1395 }
1396 }
1397
1398 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1399 prm->seg_cnt, prm->req_cnt);
1400 return 0;
1401
1402 out_err:
1403 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1404 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1405 0, prm->cmd->sg_cnt);
1406 return -1;
1407 }
1408
1409 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1410 struct qla_tgt_cmd *cmd)
1411 {
1412 struct qla_hw_data *ha = vha->hw;
1413
1414 BUG_ON(!cmd->sg_mapped);
1415 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1416 cmd->sg_mapped = 0;
1417
1418 if (cmd->prot_sg_cnt)
1419 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1420 cmd->dma_data_direction);
1421
1422 if (cmd->ctx_dsd_alloced)
1423 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1424
1425 if (cmd->ctx)
1426 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1427 }
1428
1429 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1430 uint32_t req_cnt)
1431 {
1432 struct qla_hw_data *ha = vha->hw;
1433 device_reg_t __iomem *reg = ha->iobase;
1434 uint32_t cnt;
1435
1436 if (vha->req->cnt < (req_cnt + 2)) {
1437 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1438
1439 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1440 "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1441 "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1442 vha->req->ring_index, vha->req->cnt, req_cnt);
1443 if (vha->req->ring_index < cnt)
1444 vha->req->cnt = cnt - vha->req->ring_index;
1445 else
1446 vha->req->cnt = vha->req->length -
1447 (vha->req->ring_index - cnt);
1448 }
1449
1450 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1451 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1452 "qla_target(%d): There is no room in the "
1453 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1454 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1455 vha->req->cnt, req_cnt);
1456 return -EAGAIN;
1457 }
1458 vha->req->cnt -= req_cnt;
1459
1460 return 0;
1461 }
1462
1463 /*
1464 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1465 */
1466 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1467 {
1468 /* Adjust ring index. */
1469 vha->req->ring_index++;
1470 if (vha->req->ring_index == vha->req->length) {
1471 vha->req->ring_index = 0;
1472 vha->req->ring_ptr = vha->req->ring;
1473 } else {
1474 vha->req->ring_ptr++;
1475 }
1476 return (cont_entry_t *)vha->req->ring_ptr;
1477 }
1478
1479 /* ha->hardware_lock supposed to be held on entry */
1480 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1481 {
1482 struct qla_hw_data *ha = vha->hw;
1483 uint32_t h;
1484
1485 h = ha->tgt.current_handle;
1486 /* always increment cmd handle */
1487 do {
1488 ++h;
1489 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1490 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1491 if (h == ha->tgt.current_handle) {
1492 ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1493 "qla_target(%d): Ran out of "
1494 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1495 h = QLA_TGT_NULL_HANDLE;
1496 break;
1497 }
1498 } while ((h == QLA_TGT_NULL_HANDLE) ||
1499 (h == QLA_TGT_SKIP_HANDLE) ||
1500 (ha->tgt.cmds[h-1] != NULL));
1501
1502 if (h != QLA_TGT_NULL_HANDLE)
1503 ha->tgt.current_handle = h;
1504
1505 return h;
1506 }
1507
1508 /* ha->hardware_lock supposed to be held on entry */
1509 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1510 struct scsi_qla_host *vha)
1511 {
1512 uint32_t h;
1513 struct ctio7_to_24xx *pkt;
1514 struct qla_hw_data *ha = vha->hw;
1515 struct atio_from_isp *atio = &prm->cmd->atio;
1516
1517 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1518 prm->pkt = pkt;
1519 memset(pkt, 0, sizeof(*pkt));
1520
1521 pkt->entry_type = CTIO_TYPE7;
1522 pkt->entry_count = (uint8_t)prm->req_cnt;
1523 pkt->vp_index = vha->vp_idx;
1524
1525 h = qlt_make_handle(vha);
1526 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1527 /*
1528 * CTIO type 7 from the firmware doesn't provide a way to
1529 * know the initiator's LOOP ID, hence we can't find
1530 * the session and, so, the command.
1531 */
1532 return -EAGAIN;
1533 } else
1534 ha->tgt.cmds[h-1] = prm->cmd;
1535
1536 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1537 pkt->nport_handle = prm->cmd->loop_id;
1538 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1539 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1540 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1541 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1542 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1543 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1544 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1545 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1546
1547 ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1548 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1549 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1550 le16_to_cpu(pkt->u.status0.ox_id));
1551 return 0;
1552 }
1553
1554 /*
1555 * ha->hardware_lock supposed to be held on entry. We have already made sure
1556 * that there is sufficient amount of request entries to not drop it.
1557 */
1558 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1559 struct scsi_qla_host *vha)
1560 {
1561 int cnt;
1562 uint32_t *dword_ptr;
1563 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1564
1565 /* Build continuation packets */
1566 while (prm->seg_cnt > 0) {
1567 cont_a64_entry_t *cont_pkt64 =
1568 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1569
1570 /*
1571 * Make sure that from cont_pkt64 none of
1572 * 64-bit specific fields used for 32-bit
1573 * addressing. Cast to (cont_entry_t *) for
1574 * that.
1575 */
1576
1577 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1578
1579 cont_pkt64->entry_count = 1;
1580 cont_pkt64->sys_define = 0;
1581
1582 if (enable_64bit_addressing) {
1583 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1584 dword_ptr =
1585 (uint32_t *)&cont_pkt64->dseg_0_address;
1586 } else {
1587 cont_pkt64->entry_type = CONTINUE_TYPE;
1588 dword_ptr =
1589 (uint32_t *)&((cont_entry_t *)
1590 cont_pkt64)->dseg_0_address;
1591 }
1592
1593 /* Load continuation entry data segments */
1594 for (cnt = 0;
1595 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1596 cnt++, prm->seg_cnt--) {
1597 *dword_ptr++ =
1598 cpu_to_le32(pci_dma_lo32
1599 (sg_dma_address(prm->sg)));
1600 if (enable_64bit_addressing) {
1601 *dword_ptr++ =
1602 cpu_to_le32(pci_dma_hi32
1603 (sg_dma_address
1604 (prm->sg)));
1605 }
1606 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1607
1608 ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1609 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1610 (long long unsigned int)
1611 pci_dma_hi32(sg_dma_address(prm->sg)),
1612 (long long unsigned int)
1613 pci_dma_lo32(sg_dma_address(prm->sg)),
1614 (int)sg_dma_len(prm->sg));
1615
1616 prm->sg = sg_next(prm->sg);
1617 }
1618 }
1619 }
1620
1621 /*
1622 * ha->hardware_lock supposed to be held on entry. We have already made sure
1623 * that there is sufficient amount of request entries to not drop it.
1624 */
1625 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1626 struct scsi_qla_host *vha)
1627 {
1628 int cnt;
1629 uint32_t *dword_ptr;
1630 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1631 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1632
1633 ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1634 "iocb->scsi_status=%x, iocb->flags=%x\n",
1635 le16_to_cpu(pkt24->u.status0.scsi_status),
1636 le16_to_cpu(pkt24->u.status0.flags));
1637
1638 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1639
1640 /* Setup packet address segment pointer */
1641 dword_ptr = pkt24->u.status0.dseg_0_address;
1642
1643 /* Set total data segment count */
1644 if (prm->seg_cnt)
1645 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1646
1647 if (prm->seg_cnt == 0) {
1648 /* No data transfer */
1649 *dword_ptr++ = 0;
1650 *dword_ptr = 0;
1651 return;
1652 }
1653
1654 /* If scatter gather */
1655 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1656
1657 /* Load command entry data segments */
1658 for (cnt = 0;
1659 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1660 cnt++, prm->seg_cnt--) {
1661 *dword_ptr++ =
1662 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1663 if (enable_64bit_addressing) {
1664 *dword_ptr++ =
1665 cpu_to_le32(pci_dma_hi32(
1666 sg_dma_address(prm->sg)));
1667 }
1668 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1669
1670 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1671 "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1672 (long long unsigned int)pci_dma_hi32(sg_dma_address(
1673 prm->sg)),
1674 (long long unsigned int)pci_dma_lo32(sg_dma_address(
1675 prm->sg)),
1676 (int)sg_dma_len(prm->sg));
1677
1678 prm->sg = sg_next(prm->sg);
1679 }
1680
1681 qlt_load_cont_data_segments(prm, vha);
1682 }
1683
1684 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1685 {
1686 return cmd->bufflen > 0;
1687 }
1688
1689 /*
1690 * Called without ha->hardware_lock held
1691 */
1692 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1693 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1694 uint32_t *full_req_cnt)
1695 {
1696 struct qla_tgt *tgt = cmd->tgt;
1697 struct scsi_qla_host *vha = tgt->vha;
1698 struct qla_hw_data *ha = vha->hw;
1699 struct se_cmd *se_cmd = &cmd->se_cmd;
1700
1701 if (unlikely(cmd->aborted)) {
1702 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1703 "qla_target(%d): terminating exchange "
1704 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1705 se_cmd, cmd->tag);
1706
1707 cmd->state = QLA_TGT_STATE_ABORTED;
1708
1709 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1710
1711 /* !! At this point cmd could be already freed !! */
1712 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1713 }
1714
1715 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u ox_id %04x\n",
1716 vha->vp_idx, cmd->tag,
1717 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
1718
1719 prm->cmd = cmd;
1720 prm->tgt = tgt;
1721 prm->rq_result = scsi_status;
1722 prm->sense_buffer = &cmd->sense_buffer[0];
1723 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1724 prm->sg = NULL;
1725 prm->seg_cnt = -1;
1726 prm->req_cnt = 1;
1727 prm->add_status_pkt = 0;
1728
1729 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1730 prm->rq_result, xmit_type);
1731
1732 /* Send marker if required */
1733 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1734 return -EFAULT;
1735
1736 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1737
1738 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1739 if (qlt_pci_map_calc_cnt(prm) != 0)
1740 return -EAGAIN;
1741 }
1742
1743 *full_req_cnt = prm->req_cnt;
1744
1745 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1746 prm->residual = se_cmd->residual_count;
1747 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1748 "Residual underflow: %d (tag %d, "
1749 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1750 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1751 cmd->bufflen, prm->rq_result);
1752 prm->rq_result |= SS_RESIDUAL_UNDER;
1753 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1754 prm->residual = se_cmd->residual_count;
1755 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1756 "Residual overflow: %d (tag %d, "
1757 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1758 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1759 cmd->bufflen, prm->rq_result);
1760 prm->rq_result |= SS_RESIDUAL_OVER;
1761 }
1762
1763 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1764 /*
1765 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1766 * ignored in *xmit_response() below
1767 */
1768 if (qlt_has_data(cmd)) {
1769 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1770 (IS_FWI2_CAPABLE(ha) &&
1771 (prm->rq_result != 0))) {
1772 prm->add_status_pkt = 1;
1773 (*full_req_cnt)++;
1774 }
1775 }
1776 }
1777
1778 ql_dbg(ql_dbg_tgt, vha, 0xe016,
1779 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1780 prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1781
1782 return 0;
1783 }
1784
1785 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1786 struct qla_tgt_cmd *cmd, int sending_sense)
1787 {
1788 if (ha->tgt.enable_class_2)
1789 return 0;
1790
1791 if (sending_sense)
1792 return cmd->conf_compl_supported;
1793 else
1794 return ha->tgt.enable_explicit_conf &&
1795 cmd->conf_compl_supported;
1796 }
1797
1798 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1799 /*
1800 * Original taken from the XFS code
1801 */
1802 static unsigned long qlt_srr_random(void)
1803 {
1804 static int Inited;
1805 static unsigned long RandomValue;
1806 static DEFINE_SPINLOCK(lock);
1807 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1808 register long rv;
1809 register long lo;
1810 register long hi;
1811 unsigned long flags;
1812
1813 spin_lock_irqsave(&lock, flags);
1814 if (!Inited) {
1815 RandomValue = jiffies;
1816 Inited = 1;
1817 }
1818 rv = RandomValue;
1819 hi = rv / 127773;
1820 lo = rv % 127773;
1821 rv = 16807 * lo - 2836 * hi;
1822 if (rv <= 0)
1823 rv += 2147483647;
1824 RandomValue = rv;
1825 spin_unlock_irqrestore(&lock, flags);
1826 return rv;
1827 }
1828
1829 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1830 {
1831 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1832 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1833 == 50) {
1834 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1835 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1836 "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1837 }
1838 #endif
1839 /*
1840 * It's currently not possible to simulate SRRs for FCP_WRITE without
1841 * a physical link layer failure, so don't even try here..
1842 */
1843 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1844 return;
1845
1846 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1847 ((qlt_srr_random() % 100) == 20)) {
1848 int i, leave = 0;
1849 unsigned int tot_len = 0;
1850
1851 while (leave == 0)
1852 leave = qlt_srr_random() % cmd->sg_cnt;
1853
1854 for (i = 0; i < leave; i++)
1855 tot_len += cmd->sg[i].length;
1856
1857 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1858 "Cutting cmd %p (tag %d) buffer"
1859 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1860 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1861 cmd->bufflen, cmd->sg_cnt);
1862
1863 cmd->bufflen = tot_len;
1864 cmd->sg_cnt = leave;
1865 }
1866
1867 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1868 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1869
1870 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1871 "Cutting cmd %p (tag %d) buffer head "
1872 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1873 cmd->bufflen);
1874 if (offset == 0)
1875 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1876 else if (qlt_set_data_offset(cmd, offset)) {
1877 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1878 "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1879 }
1880 }
1881 }
1882 #else
1883 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1884 {}
1885 #endif
1886
1887 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1888 struct qla_tgt_prm *prm)
1889 {
1890 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1891 (uint32_t)sizeof(ctio->u.status1.sense_data));
1892 ctio->u.status0.flags |=
1893 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1894 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1895 ctio->u.status0.flags |= __constant_cpu_to_le16(
1896 CTIO7_FLAGS_EXPLICIT_CONFORM |
1897 CTIO7_FLAGS_CONFORM_REQ);
1898 }
1899 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1900 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1901 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1902 int i;
1903
1904 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1905 if (prm->cmd->se_cmd.scsi_status != 0) {
1906 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1907 "Skipping EXPLICIT_CONFORM and "
1908 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1909 "non GOOD status\n");
1910 goto skip_explict_conf;
1911 }
1912 ctio->u.status1.flags |= __constant_cpu_to_le16(
1913 CTIO7_FLAGS_EXPLICIT_CONFORM |
1914 CTIO7_FLAGS_CONFORM_REQ);
1915 }
1916 skip_explict_conf:
1917 ctio->u.status1.flags &=
1918 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1919 ctio->u.status1.flags |=
1920 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1921 ctio->u.status1.scsi_status |=
1922 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1923 ctio->u.status1.sense_length =
1924 cpu_to_le16(prm->sense_buffer_len);
1925 for (i = 0; i < prm->sense_buffer_len/4; i++)
1926 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1927 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1928 #if 0
1929 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1930 static int q;
1931 if (q < 10) {
1932 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1933 "qla_target(%d): %d bytes of sense "
1934 "lost", prm->tgt->ha->vp_idx,
1935 prm->sense_buffer_len % 4);
1936 q++;
1937 }
1938 }
1939 #endif
1940 } else {
1941 ctio->u.status1.flags &=
1942 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1943 ctio->u.status1.flags |=
1944 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1945 ctio->u.status1.sense_length = 0;
1946 memset(ctio->u.status1.sense_data, 0,
1947 sizeof(ctio->u.status1.sense_data));
1948 }
1949
1950 /* Sense with len > 24, is it possible ??? */
1951 }
1952
1953
1954
1955 /* diff */
1956 static inline int
1957 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1958 {
1959 /*
1960 * Uncomment when corresponding SCSI changes are done.
1961 *
1962 if (!sp->cmd->prot_chk)
1963 return 0;
1964 *
1965 */
1966 switch (se_cmd->prot_op) {
1967 case TARGET_PROT_DOUT_INSERT:
1968 case TARGET_PROT_DIN_STRIP:
1969 if (ql2xenablehba_err_chk >= 1)
1970 return 1;
1971 break;
1972 case TARGET_PROT_DOUT_PASS:
1973 case TARGET_PROT_DIN_PASS:
1974 if (ql2xenablehba_err_chk >= 2)
1975 return 1;
1976 break;
1977 case TARGET_PROT_DIN_INSERT:
1978 case TARGET_PROT_DOUT_STRIP:
1979 return 1;
1980 default:
1981 break;
1982 }
1983 return 0;
1984 }
1985
1986 /*
1987 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
1988 *
1989 */
1990 static inline void
1991 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
1992 {
1993 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
1994
1995 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
1996 * have been immplemented by TCM, before AppTag is avail.
1997 * Look for modesense_handlers[]
1998 */
1999 ctx->app_tag = __constant_cpu_to_le16(0);
2000 ctx->app_tag_mask[0] = 0x0;
2001 ctx->app_tag_mask[1] = 0x0;
2002
2003 switch (se_cmd->prot_type) {
2004 case TARGET_DIF_TYPE0_PROT:
2005 /*
2006 * No check for ql2xenablehba_err_chk, as it would be an
2007 * I/O error if hba tag generation is not done.
2008 */
2009 ctx->ref_tag = cpu_to_le32(lba);
2010
2011 if (!qlt_hba_err_chk_enabled(se_cmd))
2012 break;
2013
2014 /* enable ALL bytes of the ref tag */
2015 ctx->ref_tag_mask[0] = 0xff;
2016 ctx->ref_tag_mask[1] = 0xff;
2017 ctx->ref_tag_mask[2] = 0xff;
2018 ctx->ref_tag_mask[3] = 0xff;
2019 break;
2020 /*
2021 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2022 * 16 bit app tag.
2023 */
2024 case TARGET_DIF_TYPE1_PROT:
2025 ctx->ref_tag = cpu_to_le32(lba);
2026
2027 if (!qlt_hba_err_chk_enabled(se_cmd))
2028 break;
2029
2030 /* enable ALL bytes of the ref tag */
2031 ctx->ref_tag_mask[0] = 0xff;
2032 ctx->ref_tag_mask[1] = 0xff;
2033 ctx->ref_tag_mask[2] = 0xff;
2034 ctx->ref_tag_mask[3] = 0xff;
2035 break;
2036 /*
2037 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2038 * match LBA in CDB + N
2039 */
2040 case TARGET_DIF_TYPE2_PROT:
2041 ctx->ref_tag = cpu_to_le32(lba);
2042
2043 if (!qlt_hba_err_chk_enabled(se_cmd))
2044 break;
2045
2046 /* enable ALL bytes of the ref tag */
2047 ctx->ref_tag_mask[0] = 0xff;
2048 ctx->ref_tag_mask[1] = 0xff;
2049 ctx->ref_tag_mask[2] = 0xff;
2050 ctx->ref_tag_mask[3] = 0xff;
2051 break;
2052
2053 /* For Type 3 protection: 16 bit GUARD only */
2054 case TARGET_DIF_TYPE3_PROT:
2055 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2056 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2057 break;
2058 }
2059 }
2060
2061
2062 static inline int
2063 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2064 {
2065 uint32_t *cur_dsd;
2066 int sgc;
2067 uint32_t transfer_length = 0;
2068 uint32_t data_bytes;
2069 uint32_t dif_bytes;
2070 uint8_t bundling = 1;
2071 uint8_t *clr_ptr;
2072 struct crc_context *crc_ctx_pkt = NULL;
2073 struct qla_hw_data *ha;
2074 struct ctio_crc2_to_fw *pkt;
2075 dma_addr_t crc_ctx_dma;
2076 uint16_t fw_prot_opts = 0;
2077 struct qla_tgt_cmd *cmd = prm->cmd;
2078 struct se_cmd *se_cmd = &cmd->se_cmd;
2079 uint32_t h;
2080 struct atio_from_isp *atio = &prm->cmd->atio;
2081
2082 sgc = 0;
2083 ha = vha->hw;
2084
2085 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2086 prm->pkt = pkt;
2087 memset(pkt, 0, sizeof(*pkt));
2088
2089 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2090 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2091 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2092 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2093
2094 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2095 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2096 bundling = 0;
2097
2098 /* Compute dif len and adjust data len to incude protection */
2099 data_bytes = cmd->bufflen;
2100 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2101
2102 switch (se_cmd->prot_op) {
2103 case TARGET_PROT_DIN_INSERT:
2104 case TARGET_PROT_DOUT_STRIP:
2105 transfer_length = data_bytes;
2106 data_bytes += dif_bytes;
2107 break;
2108
2109 case TARGET_PROT_DIN_STRIP:
2110 case TARGET_PROT_DOUT_INSERT:
2111 case TARGET_PROT_DIN_PASS:
2112 case TARGET_PROT_DOUT_PASS:
2113 transfer_length = data_bytes + dif_bytes;
2114 break;
2115
2116 default:
2117 BUG();
2118 break;
2119 }
2120
2121 if (!qlt_hba_err_chk_enabled(se_cmd))
2122 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2123 /* HBA error checking enabled */
2124 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2125 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2126 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2127 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2128 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2129 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2130 }
2131
2132 switch (se_cmd->prot_op) {
2133 case TARGET_PROT_DIN_INSERT:
2134 case TARGET_PROT_DOUT_INSERT:
2135 fw_prot_opts |= PO_MODE_DIF_INSERT;
2136 break;
2137 case TARGET_PROT_DIN_STRIP:
2138 case TARGET_PROT_DOUT_STRIP:
2139 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2140 break;
2141 case TARGET_PROT_DIN_PASS:
2142 case TARGET_PROT_DOUT_PASS:
2143 fw_prot_opts |= PO_MODE_DIF_PASS;
2144 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2145 break;
2146 default:/* Normal Request */
2147 fw_prot_opts |= PO_MODE_DIF_PASS;
2148 break;
2149 }
2150
2151
2152 /* ---- PKT ---- */
2153 /* Update entry type to indicate Command Type CRC_2 IOCB */
2154 pkt->entry_type = CTIO_CRC2;
2155 pkt->entry_count = 1;
2156 pkt->vp_index = vha->vp_idx;
2157
2158 h = qlt_make_handle(vha);
2159 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2160 /*
2161 * CTIO type 7 from the firmware doesn't provide a way to
2162 * know the initiator's LOOP ID, hence we can't find
2163 * the session and, so, the command.
2164 */
2165 return -EAGAIN;
2166 } else
2167 ha->tgt.cmds[h-1] = prm->cmd;
2168
2169
2170 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2171 pkt->nport_handle = prm->cmd->loop_id;
2172 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2173 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2174 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2175 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2176 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2177 pkt->ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2178 pkt->flags |= (atio->u.isp24.attr << 9);
2179 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2180
2181 /* Set transfer direction */
2182 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2183 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2184 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2185 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2186
2187
2188 pkt->dseg_count = prm->tot_dsds;
2189 /* Fibre channel byte count */
2190 pkt->transfer_length = cpu_to_le32(transfer_length);
2191
2192
2193 /* ----- CRC context -------- */
2194
2195 /* Allocate CRC context from global pool */
2196 crc_ctx_pkt = cmd->ctx =
2197 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2198
2199 if (!crc_ctx_pkt)
2200 goto crc_queuing_error;
2201
2202 /* Zero out CTX area. */
2203 clr_ptr = (uint8_t *)crc_ctx_pkt;
2204 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2205
2206 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2207 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2208
2209 /* Set handle */
2210 crc_ctx_pkt->handle = pkt->handle;
2211
2212 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2213
2214 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2215 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2216 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2217
2218
2219 if (!bundling) {
2220 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2221 } else {
2222 /*
2223 * Configure Bundling if we need to fetch interlaving
2224 * protection PCI accesses
2225 */
2226 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2227 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2228 crc_ctx_pkt->u.bundling.dseg_count =
2229 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2230 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2231 }
2232
2233 /* Finish the common fields of CRC pkt */
2234 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2235 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2236 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2237 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2238
2239
2240 /* Walks data segments */
2241 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2242
2243 if (!bundling && prm->prot_seg_cnt) {
2244 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2245 prm->tot_dsds, cmd))
2246 goto crc_queuing_error;
2247 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2248 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2249 goto crc_queuing_error;
2250
2251 if (bundling && prm->prot_seg_cnt) {
2252 /* Walks dif segments */
2253 pkt->add_flags |=
2254 __constant_cpu_to_le16(CTIO_CRC2_AF_DIF_DSD_ENA);
2255
2256 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2257 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2258 prm->prot_seg_cnt, cmd))
2259 goto crc_queuing_error;
2260 }
2261 return QLA_SUCCESS;
2262
2263 crc_queuing_error:
2264 /* Cleanup will be performed by the caller */
2265
2266 return QLA_FUNCTION_FAILED;
2267 }
2268
2269
2270 /*
2271 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2272 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2273 */
2274 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2275 uint8_t scsi_status)
2276 {
2277 struct scsi_qla_host *vha = cmd->vha;
2278 struct qla_hw_data *ha = vha->hw;
2279 struct ctio7_to_24xx *pkt;
2280 struct qla_tgt_prm prm;
2281 uint32_t full_req_cnt = 0;
2282 unsigned long flags = 0;
2283 int res;
2284
2285 memset(&prm, 0, sizeof(prm));
2286 qlt_check_srr_debug(cmd, &xmit_type);
2287
2288 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2289 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2290 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2291 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2292 &cmd->se_cmd);
2293
2294 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2295 &full_req_cnt);
2296 if (unlikely(res != 0)) {
2297 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2298 return 0;
2299
2300 return res;
2301 }
2302
2303 spin_lock_irqsave(&ha->hardware_lock, flags);
2304
2305 /* Does F/W have an IOCBs for this request */
2306 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2307 if (unlikely(res))
2308 goto out_unmap_unlock;
2309
2310 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2311 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2312 else
2313 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2314 if (unlikely(res != 0))
2315 goto out_unmap_unlock;
2316
2317
2318 pkt = (struct ctio7_to_24xx *)prm.pkt;
2319
2320 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2321 pkt->u.status0.flags |=
2322 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2323 CTIO7_FLAGS_STATUS_MODE_0);
2324
2325 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2326 qlt_load_data_segments(&prm, vha);
2327
2328 if (prm.add_status_pkt == 0) {
2329 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2330 pkt->u.status0.scsi_status =
2331 cpu_to_le16(prm.rq_result);
2332 pkt->u.status0.residual =
2333 cpu_to_le32(prm.residual);
2334 pkt->u.status0.flags |= __constant_cpu_to_le16(
2335 CTIO7_FLAGS_SEND_STATUS);
2336 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2337 pkt->u.status0.flags |=
2338 __constant_cpu_to_le16(
2339 CTIO7_FLAGS_EXPLICIT_CONFORM |
2340 CTIO7_FLAGS_CONFORM_REQ);
2341 }
2342 }
2343
2344 } else {
2345 /*
2346 * We have already made sure that there is sufficient
2347 * amount of request entries to not drop HW lock in
2348 * req_pkt().
2349 */
2350 struct ctio7_to_24xx *ctio =
2351 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2352
2353 ql_dbg(ql_dbg_tgt, vha, 0xe019,
2354 "Building additional status packet\n");
2355
2356 /*
2357 * T10Dif: ctio_crc2_to_fw overlay ontop of
2358 * ctio7_to_24xx
2359 */
2360 memcpy(ctio, pkt, sizeof(*ctio));
2361 /* reset back to CTIO7 */
2362 ctio->entry_count = 1;
2363 ctio->entry_type = CTIO_TYPE7;
2364 ctio->dseg_count = 0;
2365 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2366 CTIO7_FLAGS_DATA_IN);
2367
2368 /* Real finish is ctio_m1's finish */
2369 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2370 pkt->u.status0.flags |= __constant_cpu_to_le16(
2371 CTIO7_FLAGS_DONT_RET_CTIO);
2372
2373 /* qlt_24xx_init_ctio_to_isp will correct
2374 * all neccessary fields that's part of CTIO7.
2375 * There should be no residual of CTIO-CRC2 data.
2376 */
2377 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2378 &prm);
2379 pr_debug("Status CTIO7: %p\n", ctio);
2380 }
2381 } else
2382 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2383
2384
2385 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2386
2387 ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2388 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2389 pkt, scsi_status);
2390
2391 qla2x00_start_iocbs(vha, vha->req);
2392 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2393
2394 return 0;
2395
2396 out_unmap_unlock:
2397 if (cmd->sg_mapped)
2398 qlt_unmap_sg(vha, cmd);
2399 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2400
2401 return res;
2402 }
2403 EXPORT_SYMBOL(qlt_xmit_response);
2404
2405 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2406 {
2407 struct ctio7_to_24xx *pkt;
2408 struct scsi_qla_host *vha = cmd->vha;
2409 struct qla_hw_data *ha = vha->hw;
2410 struct qla_tgt *tgt = cmd->tgt;
2411 struct qla_tgt_prm prm;
2412 unsigned long flags;
2413 int res = 0;
2414
2415 memset(&prm, 0, sizeof(prm));
2416 prm.cmd = cmd;
2417 prm.tgt = tgt;
2418 prm.sg = NULL;
2419 prm.req_cnt = 1;
2420
2421 /* Send marker if required */
2422 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2423 return -EIO;
2424
2425 ql_dbg(ql_dbg_tgt, vha, 0xe01b,
2426 "%s: CTIO_start: vha(%d) se_cmd %p ox_id %04x\n",
2427 __func__, (int)vha->vp_idx, &cmd->se_cmd,
2428 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2429
2430 /* Calculate number of entries and segments required */
2431 if (qlt_pci_map_calc_cnt(&prm) != 0)
2432 return -EAGAIN;
2433
2434 spin_lock_irqsave(&ha->hardware_lock, flags);
2435
2436 /* Does F/W have an IOCBs for this request */
2437 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2438 if (res != 0)
2439 goto out_unlock_free_unmap;
2440 if (cmd->se_cmd.prot_op)
2441 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2442 else
2443 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2444
2445 if (unlikely(res != 0))
2446 goto out_unlock_free_unmap;
2447 pkt = (struct ctio7_to_24xx *)prm.pkt;
2448 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2449 CTIO7_FLAGS_STATUS_MODE_0);
2450
2451 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2452 qlt_load_data_segments(&prm, vha);
2453
2454 cmd->state = QLA_TGT_STATE_NEED_DATA;
2455
2456 qla2x00_start_iocbs(vha, vha->req);
2457 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2458
2459 return res;
2460
2461 out_unlock_free_unmap:
2462 if (cmd->sg_mapped)
2463 qlt_unmap_sg(vha, cmd);
2464 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2465
2466 return res;
2467 }
2468 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2469
2470
2471 /*
2472 * Checks the guard or meta-data for the type of error
2473 * detected by the HBA.
2474 */
2475 static inline int
2476 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2477 struct ctio_crc_from_fw *sts)
2478 {
2479 uint8_t *ap = &sts->actual_dif[0];
2480 uint8_t *ep = &sts->expected_dif[0];
2481 uint32_t e_ref_tag, a_ref_tag;
2482 uint16_t e_app_tag, a_app_tag;
2483 uint16_t e_guard, a_guard;
2484 uint64_t lba = cmd->se_cmd.t_task_lba;
2485
2486 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2487 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2488 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2489
2490 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2491 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2492 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2493
2494 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2495 "iocb(s) %p Returned STATUS.\n", sts);
2496
2497 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2498 "dif check TGT cdb 0x%x lba 0x%llu: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2499 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2500 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2501
2502 /*
2503 * Ignore sector if:
2504 * For type 3: ref & app tag is all 'f's
2505 * For type 0,1,2: app tag is all 'f's
2506 */
2507 if ((a_app_tag == 0xffff) &&
2508 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2509 (a_ref_tag == 0xffffffff))) {
2510 uint32_t blocks_done;
2511
2512 /* 2TB boundary case covered automatically with this */
2513 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2514 cmd->se_cmd.bad_sector = e_ref_tag;
2515 cmd->se_cmd.pi_err = 0;
2516 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2517 "need to return scsi good\n");
2518
2519 /* Update protection tag */
2520 if (cmd->prot_sg_cnt) {
2521 uint32_t i, j = 0, k = 0, num_ent;
2522 struct scatterlist *sg, *sgl;
2523
2524
2525 sgl = cmd->prot_sg;
2526
2527 /* Patch the corresponding protection tags */
2528 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2529 num_ent = sg_dma_len(sg) / 8;
2530 if (k + num_ent < blocks_done) {
2531 k += num_ent;
2532 continue;
2533 }
2534 j = blocks_done - k - 1;
2535 k = blocks_done;
2536 break;
2537 }
2538
2539 if (k != blocks_done) {
2540 ql_log(ql_log_warn, vha, 0xf076,
2541 "unexpected tag values tag:lba=%u:%llu)\n",
2542 e_ref_tag, (unsigned long long)lba);
2543 goto out;
2544 }
2545
2546 #if 0
2547 struct sd_dif_tuple *spt;
2548 /* TODO:
2549 * This section came from initiator. Is it valid here?
2550 * should ulp be override with actual val???
2551 */
2552 spt = page_address(sg_page(sg)) + sg->offset;
2553 spt += j;
2554
2555 spt->app_tag = 0xffff;
2556 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2557 spt->ref_tag = 0xffffffff;
2558 #endif
2559 }
2560
2561 return 0;
2562 }
2563
2564 /* check guard */
2565 if (e_guard != a_guard) {
2566 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2567 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2568
2569 ql_log(ql_log_warn, vha, 0xe076,
2570 "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2571 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2572 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2573 a_guard, e_guard, cmd);
2574 goto out;
2575 }
2576
2577 /* check ref tag */
2578 if (e_ref_tag != a_ref_tag) {
2579 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2580 cmd->se_cmd.bad_sector = e_ref_tag;
2581
2582 ql_log(ql_log_warn, vha, 0xe077,
2583 "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2584 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2585 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2586 a_guard, e_guard, cmd);
2587 goto out;
2588 }
2589
2590 /* check appl tag */
2591 if (e_app_tag != a_app_tag) {
2592 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2593 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2594
2595 ql_log(ql_log_warn, vha, 0xe078,
2596 "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2597 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2598 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2599 a_guard, e_guard, cmd);
2600 goto out;
2601 }
2602 out:
2603 return 1;
2604 }
2605
2606
2607 /* If hardware_lock held on entry, might drop it, then reaquire */
2608 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2609 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2610 struct qla_tgt_cmd *cmd,
2611 struct atio_from_isp *atio)
2612 {
2613 struct ctio7_to_24xx *ctio24;
2614 struct qla_hw_data *ha = vha->hw;
2615 request_t *pkt;
2616 int ret = 0;
2617
2618 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2619
2620 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2621 if (pkt == NULL) {
2622 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2623 "qla_target(%d): %s failed: unable to allocate "
2624 "request packet\n", vha->vp_idx, __func__);
2625 return -ENOMEM;
2626 }
2627
2628 if (cmd != NULL) {
2629 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2630 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2631 "qla_target(%d): Terminating cmd %p with "
2632 "incorrect state %d\n", vha->vp_idx, cmd,
2633 cmd->state);
2634 } else
2635 ret = 1;
2636 }
2637
2638 pkt->entry_count = 1;
2639 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2640
2641 ctio24 = (struct ctio7_to_24xx *)pkt;
2642 ctio24->entry_type = CTIO_TYPE7;
2643 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2644 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2645 ctio24->vp_index = vha->vp_idx;
2646 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2647 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2648 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2649 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2650 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2651 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2652 CTIO7_FLAGS_TERMINATE);
2653 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2654
2655 /* Most likely, it isn't needed */
2656 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2657 &atio->u.isp24.fcp_cmnd.add_cdb[
2658 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2659 if (ctio24->u.status1.residual != 0)
2660 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2661
2662 qla2x00_start_iocbs(vha, vha->req);
2663 return ret;
2664 }
2665
2666 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2667 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2668 {
2669 unsigned long flags;
2670 int rc;
2671
2672 if (qlt_issue_marker(vha, ha_locked) < 0)
2673 return;
2674
2675 if (ha_locked) {
2676 rc = __qlt_send_term_exchange(vha, cmd, atio);
2677 goto done;
2678 }
2679 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2680 rc = __qlt_send_term_exchange(vha, cmd, atio);
2681 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2682 done:
2683 /*
2684 * Terminate exchange will tell fw to release any active CTIO
2685 * that's in FW posession and cleanup the exchange.
2686 *
2687 * "cmd->state == QLA_TGT_STATE_ABORTED" means CTIO is still
2688 * down at FW. Free the cmd later when CTIO comes back later
2689 * w/aborted(0x2) status.
2690 *
2691 * "cmd->state != QLA_TGT_STATE_ABORTED" means CTIO is already
2692 * back w/some err. Free the cmd now.
2693 */
2694 if ((rc == 1) && (cmd->state != QLA_TGT_STATE_ABORTED)) {
2695 if (!ha_locked && !in_interrupt())
2696 msleep(250); /* just in case */
2697
2698 if (cmd->sg_mapped)
2699 qlt_unmap_sg(vha, cmd);
2700 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2701 }
2702 return;
2703 }
2704
2705 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2706 {
2707 struct qla_tgt_sess *sess = cmd->sess;
2708
2709 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2710 "%s: se_cmd[%p] ox_id %04x\n",
2711 __func__, &cmd->se_cmd,
2712 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2713
2714 BUG_ON(cmd->sg_mapped);
2715 if (unlikely(cmd->free_sg))
2716 kfree(cmd->sg);
2717
2718 if (!sess || !sess->se_sess) {
2719 WARN_ON(1);
2720 return;
2721 }
2722 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2723 }
2724 EXPORT_SYMBOL(qlt_free_cmd);
2725
2726 /* ha->hardware_lock supposed to be held on entry */
2727 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2728 struct qla_tgt_cmd *cmd, void *ctio)
2729 {
2730 struct qla_tgt_srr_ctio *sc;
2731 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2732 struct qla_tgt_srr_imm *imm;
2733
2734 tgt->ctio_srr_id++;
2735
2736 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2737 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2738
2739 if (!ctio) {
2740 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2741 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2742 vha->vp_idx);
2743 return -EINVAL;
2744 }
2745
2746 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2747 if (sc != NULL) {
2748 sc->cmd = cmd;
2749 /* IRQ is already OFF */
2750 spin_lock(&tgt->srr_lock);
2751 sc->srr_id = tgt->ctio_srr_id;
2752 list_add_tail(&sc->srr_list_entry,
2753 &tgt->srr_ctio_list);
2754 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2755 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2756 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2757 int found = 0;
2758 list_for_each_entry(imm, &tgt->srr_imm_list,
2759 srr_list_entry) {
2760 if (imm->srr_id == sc->srr_id) {
2761 found = 1;
2762 break;
2763 }
2764 }
2765 if (found) {
2766 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2767 "Scheduling srr work\n");
2768 schedule_work(&tgt->srr_work);
2769 } else {
2770 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2771 "qla_target(%d): imm_srr_id "
2772 "== ctio_srr_id (%d), but there is no "
2773 "corresponding SRR IMM, deleting CTIO "
2774 "SRR %p\n", vha->vp_idx,
2775 tgt->ctio_srr_id, sc);
2776 list_del(&sc->srr_list_entry);
2777 spin_unlock(&tgt->srr_lock);
2778
2779 kfree(sc);
2780 return -EINVAL;
2781 }
2782 }
2783 spin_unlock(&tgt->srr_lock);
2784 } else {
2785 struct qla_tgt_srr_imm *ti;
2786
2787 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2788 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2789 vha->vp_idx);
2790 spin_lock(&tgt->srr_lock);
2791 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2792 srr_list_entry) {
2793 if (imm->srr_id == tgt->ctio_srr_id) {
2794 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2795 "IMM SRR %p deleted (id %d)\n",
2796 imm, imm->srr_id);
2797 list_del(&imm->srr_list_entry);
2798 qlt_reject_free_srr_imm(vha, imm, 1);
2799 }
2800 }
2801 spin_unlock(&tgt->srr_lock);
2802
2803 return -ENOMEM;
2804 }
2805
2806 return 0;
2807 }
2808
2809 /*
2810 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2811 */
2812 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2813 struct qla_tgt_cmd *cmd, uint32_t status)
2814 {
2815 int term = 0;
2816
2817 if (ctio != NULL) {
2818 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2819 term = !(c->flags &
2820 __constant_cpu_to_le16(OF_TERM_EXCH));
2821 } else
2822 term = 1;
2823
2824 if (term)
2825 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2826
2827 return term;
2828 }
2829
2830 /* ha->hardware_lock supposed to be held on entry */
2831 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2832 uint32_t handle)
2833 {
2834 struct qla_hw_data *ha = vha->hw;
2835
2836 handle--;
2837 if (ha->tgt.cmds[handle] != NULL) {
2838 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2839 ha->tgt.cmds[handle] = NULL;
2840 return cmd;
2841 } else
2842 return NULL;
2843 }
2844
2845 /* ha->hardware_lock supposed to be held on entry */
2846 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2847 uint32_t handle, void *ctio)
2848 {
2849 struct qla_tgt_cmd *cmd = NULL;
2850
2851 /* Clear out internal marks */
2852 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2853 CTIO_INTERMEDIATE_HANDLE_MARK);
2854
2855 if (handle != QLA_TGT_NULL_HANDLE) {
2856 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2857 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2858 "SKIP_HANDLE CTIO\n");
2859 return NULL;
2860 }
2861 /* handle-1 is actually used */
2862 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2863 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2864 "qla_target(%d): Wrong handle %x received\n",
2865 vha->vp_idx, handle);
2866 return NULL;
2867 }
2868 cmd = qlt_get_cmd(vha, handle);
2869 if (unlikely(cmd == NULL)) {
2870 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2871 "qla_target(%d): Suspicious: unable to "
2872 "find the command with handle %x\n", vha->vp_idx,
2873 handle);
2874 return NULL;
2875 }
2876 } else if (ctio != NULL) {
2877 /* We can't get loop ID from CTIO7 */
2878 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2879 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2880 "support NULL handles\n", vha->vp_idx);
2881 return NULL;
2882 }
2883
2884 return cmd;
2885 }
2886
2887 /*
2888 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2889 */
2890 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2891 uint32_t status, void *ctio)
2892 {
2893 struct qla_hw_data *ha = vha->hw;
2894 struct se_cmd *se_cmd;
2895 struct target_core_fabric_ops *tfo;
2896 struct qla_tgt_cmd *cmd;
2897
2898 ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2899 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2900 vha->vp_idx, ctio, status, handle);
2901
2902 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2903 /* That could happen only in case of an error/reset/abort */
2904 if (status != CTIO_SUCCESS) {
2905 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2906 "Intermediate CTIO received"
2907 " (status %x)\n", status);
2908 }
2909 return;
2910 }
2911
2912 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2913 if (cmd == NULL)
2914 return;
2915
2916 se_cmd = &cmd->se_cmd;
2917 tfo = se_cmd->se_tfo;
2918
2919 if (cmd->sg_mapped)
2920 qlt_unmap_sg(vha, cmd);
2921
2922 if (unlikely(status != CTIO_SUCCESS)) {
2923 switch (status & 0xFFFF) {
2924 case CTIO_LIP_RESET:
2925 case CTIO_TARGET_RESET:
2926 case CTIO_ABORTED:
2927 /* driver request abort via Terminate exchange */
2928 case CTIO_TIMEOUT:
2929 case CTIO_INVALID_RX_ID:
2930 /* They are OK */
2931 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2932 "qla_target(%d): CTIO with "
2933 "status %#x received, state %x, se_cmd %p, "
2934 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2935 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2936 status, cmd->state, se_cmd);
2937 break;
2938
2939 case CTIO_PORT_LOGGED_OUT:
2940 case CTIO_PORT_UNAVAILABLE:
2941 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2942 "qla_target(%d): CTIO with PORT LOGGED "
2943 "OUT (29) or PORT UNAVAILABLE (28) status %x "
2944 "received (state %x, se_cmd %p)\n", vha->vp_idx,
2945 status, cmd->state, se_cmd);
2946 break;
2947
2948 case CTIO_SRR_RECEIVED:
2949 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2950 "qla_target(%d): CTIO with SRR_RECEIVED"
2951 " status %x received (state %x, se_cmd %p)\n",
2952 vha->vp_idx, status, cmd->state, se_cmd);
2953 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2954 break;
2955 else
2956 return;
2957
2958 case CTIO_DIF_ERROR: {
2959 struct ctio_crc_from_fw *crc =
2960 (struct ctio_crc_from_fw *)ctio;
2961 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
2962 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
2963 vha->vp_idx, status, cmd->state, se_cmd,
2964 *((u64 *)&crc->actual_dif[0]),
2965 *((u64 *)&crc->expected_dif[0]));
2966
2967 if (qlt_handle_dif_error(vha, cmd, ctio)) {
2968 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2969 /* scsi Write/xfer rdy complete */
2970 goto skip_term;
2971 } else {
2972 /* scsi read/xmit respond complete
2973 * call handle dif to send scsi status
2974 * rather than terminate exchange.
2975 */
2976 cmd->state = QLA_TGT_STATE_PROCESSED;
2977 ha->tgt.tgt_ops->handle_dif_err(cmd);
2978 return;
2979 }
2980 } else {
2981 /* Need to generate a SCSI good completion.
2982 * because FW did not send scsi status.
2983 */
2984 status = 0;
2985 goto skip_term;
2986 }
2987 break;
2988 }
2989 default:
2990 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2991 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
2992 vha->vp_idx, status, cmd->state, se_cmd);
2993 break;
2994 }
2995
2996
2997 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
2998 * cmd is already aborted/terminated, we don't
2999 * need to terminate again. The exchange is already
3000 * cleaned up/freed at FW level. Just cleanup at driver
3001 * level.
3002 */
3003 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3004 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3005 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3006 return;
3007 }
3008 }
3009 skip_term:
3010
3011 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3012 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
3013 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3014 int rx_status = 0;
3015
3016 cmd->state = QLA_TGT_STATE_DATA_IN;
3017
3018 if (unlikely(status != CTIO_SUCCESS))
3019 rx_status = -EIO;
3020 else
3021 cmd->write_data_transferred = 1;
3022
3023 ql_dbg(ql_dbg_tgt, vha, 0xe020,
3024 "Data received, context %x, rx_status %d\n",
3025 0x0, rx_status);
3026
3027 ha->tgt.tgt_ops->handle_data(cmd);
3028 return;
3029 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3030 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3031 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
3032 } else {
3033 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3034 "qla_target(%d): A command in state (%d) should "
3035 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3036 }
3037
3038 if (unlikely(status != CTIO_SUCCESS) &&
3039 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3040 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3041 dump_stack();
3042 }
3043
3044 ha->tgt.tgt_ops->free_cmd(cmd);
3045 }
3046
3047 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3048 uint8_t task_codes)
3049 {
3050 int fcp_task_attr;
3051
3052 switch (task_codes) {
3053 case ATIO_SIMPLE_QUEUE:
3054 fcp_task_attr = MSG_SIMPLE_TAG;
3055 break;
3056 case ATIO_HEAD_OF_QUEUE:
3057 fcp_task_attr = MSG_HEAD_TAG;
3058 break;
3059 case ATIO_ORDERED_QUEUE:
3060 fcp_task_attr = MSG_ORDERED_TAG;
3061 break;
3062 case ATIO_ACA_QUEUE:
3063 fcp_task_attr = MSG_ACA_TAG;
3064 break;
3065 case ATIO_UNTAGGED:
3066 fcp_task_attr = MSG_SIMPLE_TAG;
3067 break;
3068 default:
3069 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3070 "qla_target: unknown task code %x, use ORDERED instead\n",
3071 task_codes);
3072 fcp_task_attr = MSG_ORDERED_TAG;
3073 break;
3074 }
3075
3076 return fcp_task_attr;
3077 }
3078
3079 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3080 uint8_t *);
3081 /*
3082 * Process context for I/O path into tcm_qla2xxx code
3083 */
3084 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3085 {
3086 scsi_qla_host_t *vha = cmd->vha;
3087 struct qla_hw_data *ha = vha->hw;
3088 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3089 struct qla_tgt_sess *sess = cmd->sess;
3090 struct atio_from_isp *atio = &cmd->atio;
3091 unsigned char *cdb;
3092 unsigned long flags;
3093 uint32_t data_length;
3094 int ret, fcp_task_attr, data_dir, bidi = 0;
3095
3096 if (tgt->tgt_stop)
3097 goto out_term;
3098
3099 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3100 cmd->tag = atio->u.isp24.exchange_addr;
3101 cmd->unpacked_lun = scsilun_to_int(
3102 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3103
3104 if (atio->u.isp24.fcp_cmnd.rddata &&
3105 atio->u.isp24.fcp_cmnd.wrdata) {
3106 bidi = 1;
3107 data_dir = DMA_TO_DEVICE;
3108 } else if (atio->u.isp24.fcp_cmnd.rddata)
3109 data_dir = DMA_FROM_DEVICE;
3110 else if (atio->u.isp24.fcp_cmnd.wrdata)
3111 data_dir = DMA_TO_DEVICE;
3112 else
3113 data_dir = DMA_NONE;
3114
3115 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3116 atio->u.isp24.fcp_cmnd.task_attr);
3117 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3118 &atio->u.isp24.fcp_cmnd.add_cdb[
3119 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3120
3121 ql_dbg(ql_dbg_tgt, vha, 0xe022,
3122 "qla_target: START qla cmd: %p se_cmd %p lun: 0x%04x (tag %d) len(%d) ox_id %x\n",
3123 cmd, &cmd->se_cmd, cmd->unpacked_lun, cmd->tag, data_length,
3124 cmd->atio.u.isp24.fcp_hdr.ox_id);
3125
3126 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3127 fcp_task_attr, data_dir, bidi);
3128 if (ret != 0)
3129 goto out_term;
3130 /*
3131 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3132 */
3133 spin_lock_irqsave(&ha->hardware_lock, flags);
3134 ha->tgt.tgt_ops->put_sess(sess);
3135 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3136 return;
3137
3138 out_term:
3139 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
3140 /*
3141 * cmd has not sent to target yet, so pass NULL as the second
3142 * argument to qlt_send_term_exchange() and free the memory here.
3143 */
3144 spin_lock_irqsave(&ha->hardware_lock, flags);
3145 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3146 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3147 ha->tgt.tgt_ops->put_sess(sess);
3148 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3149 }
3150
3151 static void qlt_do_work(struct work_struct *work)
3152 {
3153 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3154
3155 __qlt_do_work(cmd);
3156 }
3157
3158 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3159 struct qla_tgt_sess *sess,
3160 struct atio_from_isp *atio)
3161 {
3162 struct se_session *se_sess = sess->se_sess;
3163 struct qla_tgt_cmd *cmd;
3164 int tag;
3165
3166 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3167 if (tag < 0)
3168 return NULL;
3169
3170 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3171 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3172
3173 memcpy(&cmd->atio, atio, sizeof(*atio));
3174 cmd->state = QLA_TGT_STATE_NEW;
3175 cmd->tgt = vha->vha_tgt.qla_tgt;
3176 cmd->vha = vha;
3177 cmd->se_cmd.map_tag = tag;
3178 cmd->sess = sess;
3179 cmd->loop_id = sess->loop_id;
3180 cmd->conf_compl_supported = sess->conf_compl_supported;
3181
3182 return cmd;
3183 }
3184
3185 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3186 uint16_t);
3187
3188 static void qlt_create_sess_from_atio(struct work_struct *work)
3189 {
3190 struct qla_tgt_sess_op *op = container_of(work,
3191 struct qla_tgt_sess_op, work);
3192 scsi_qla_host_t *vha = op->vha;
3193 struct qla_hw_data *ha = vha->hw;
3194 struct qla_tgt_sess *sess;
3195 struct qla_tgt_cmd *cmd;
3196 unsigned long flags;
3197 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3198
3199 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3200 "qla_target(%d): Unable to find wwn login"
3201 " (s_id %x:%x:%x), trying to create it manually\n",
3202 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3203
3204 if (op->atio.u.raw.entry_count > 1) {
3205 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3206 "Dropping multy entry atio %p\n", &op->atio);
3207 goto out_term;
3208 }
3209
3210 mutex_lock(&vha->vha_tgt.tgt_mutex);
3211 sess = qlt_make_local_sess(vha, s_id);
3212 /* sess has an extra creation ref. */
3213 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3214
3215 if (!sess)
3216 goto out_term;
3217 /*
3218 * Now obtain a pre-allocated session tag using the original op->atio
3219 * packet header, and dispatch into __qlt_do_work() using the existing
3220 * process context.
3221 */
3222 cmd = qlt_get_tag(vha, sess, &op->atio);
3223 if (!cmd) {
3224 spin_lock_irqsave(&ha->hardware_lock, flags);
3225 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3226 ha->tgt.tgt_ops->put_sess(sess);
3227 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3228 kfree(op);
3229 return;
3230 }
3231 /*
3232 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3233 * the extra reference taken above by qlt_make_local_sess()
3234 */
3235 __qlt_do_work(cmd);
3236 kfree(op);
3237 return;
3238
3239 out_term:
3240 spin_lock_irqsave(&ha->hardware_lock, flags);
3241 qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3242 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3243 kfree(op);
3244
3245 }
3246
3247 /* ha->hardware_lock supposed to be held on entry */
3248 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3249 struct atio_from_isp *atio)
3250 {
3251 struct qla_hw_data *ha = vha->hw;
3252 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3253 struct qla_tgt_sess *sess;
3254 struct qla_tgt_cmd *cmd;
3255
3256 if (unlikely(tgt->tgt_stop)) {
3257 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
3258 "New command while device %p is shutting down\n", tgt);
3259 return -EFAULT;
3260 }
3261
3262 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3263 if (unlikely(!sess)) {
3264 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3265 GFP_ATOMIC);
3266 if (!op)
3267 return -ENOMEM;
3268
3269 memcpy(&op->atio, atio, sizeof(*atio));
3270 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3271 queue_work(qla_tgt_wq, &op->work);
3272 return 0;
3273 }
3274 /*
3275 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3276 */
3277 kref_get(&sess->se_sess->sess_kref);
3278
3279 cmd = qlt_get_tag(vha, sess, atio);
3280 if (!cmd) {
3281 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
3282 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3283 ha->tgt.tgt_ops->put_sess(sess);
3284 return -ENOMEM;
3285 }
3286
3287 INIT_WORK(&cmd->work, qlt_do_work);
3288 queue_work(qla_tgt_wq, &cmd->work);
3289 return 0;
3290
3291 }
3292
3293 /* ha->hardware_lock supposed to be held on entry */
3294 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3295 int fn, void *iocb, int flags)
3296 {
3297 struct scsi_qla_host *vha = sess->vha;
3298 struct qla_hw_data *ha = vha->hw;
3299 struct qla_tgt_mgmt_cmd *mcmd;
3300 int res;
3301 uint8_t tmr_func;
3302
3303 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3304 if (!mcmd) {
3305 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3306 "qla_target(%d): Allocation of management "
3307 "command failed, some commands and their data could "
3308 "leak\n", vha->vp_idx);
3309 return -ENOMEM;
3310 }
3311 memset(mcmd, 0, sizeof(*mcmd));
3312 mcmd->sess = sess;
3313
3314 if (iocb) {
3315 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3316 sizeof(mcmd->orig_iocb.imm_ntfy));
3317 }
3318 mcmd->tmr_func = fn;
3319 mcmd->flags = flags;
3320
3321 switch (fn) {
3322 case QLA_TGT_CLEAR_ACA:
3323 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3324 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3325 tmr_func = TMR_CLEAR_ACA;
3326 break;
3327
3328 case QLA_TGT_TARGET_RESET:
3329 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3330 "qla_target(%d): TARGET_RESET received\n",
3331 sess->vha->vp_idx);
3332 tmr_func = TMR_TARGET_WARM_RESET;
3333 break;
3334
3335 case QLA_TGT_LUN_RESET:
3336 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3337 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3338 tmr_func = TMR_LUN_RESET;
3339 break;
3340
3341 case QLA_TGT_CLEAR_TS:
3342 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3343 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3344 tmr_func = TMR_CLEAR_TASK_SET;
3345 break;
3346
3347 case QLA_TGT_ABORT_TS:
3348 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3349 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3350 tmr_func = TMR_ABORT_TASK_SET;
3351 break;
3352 #if 0
3353 case QLA_TGT_ABORT_ALL:
3354 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3355 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3356 sess->vha->vp_idx);
3357 tmr_func = 0;
3358 break;
3359
3360 case QLA_TGT_ABORT_ALL_SESS:
3361 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3362 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3363 sess->vha->vp_idx);
3364 tmr_func = 0;
3365 break;
3366
3367 case QLA_TGT_NEXUS_LOSS_SESS:
3368 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3369 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3370 sess->vha->vp_idx);
3371 tmr_func = 0;
3372 break;
3373
3374 case QLA_TGT_NEXUS_LOSS:
3375 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3376 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3377 tmr_func = 0;
3378 break;
3379 #endif
3380 default:
3381 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3382 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3383 sess->vha->vp_idx, fn);
3384 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3385 return -ENOSYS;
3386 }
3387
3388 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3389 if (res != 0) {
3390 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3391 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3392 sess->vha->vp_idx, res);
3393 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3394 return -EFAULT;
3395 }
3396
3397 return 0;
3398 }
3399
3400 /* ha->hardware_lock supposed to be held on entry */
3401 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3402 {
3403 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3404 struct qla_hw_data *ha = vha->hw;
3405 struct qla_tgt *tgt;
3406 struct qla_tgt_sess *sess;
3407 uint32_t lun, unpacked_lun;
3408 int lun_size, fn;
3409
3410 tgt = vha->vha_tgt.qla_tgt;
3411
3412 lun = a->u.isp24.fcp_cmnd.lun;
3413 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3414 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3415 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3416 a->u.isp24.fcp_hdr.s_id);
3417 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3418
3419 if (!sess) {
3420 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3421 "qla_target(%d): task mgmt fn 0x%x for "
3422 "non-existant session\n", vha->vp_idx, fn);
3423 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3424 sizeof(struct atio_from_isp));
3425 }
3426
3427 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3428 }
3429
3430 /* ha->hardware_lock supposed to be held on entry */
3431 static int __qlt_abort_task(struct scsi_qla_host *vha,
3432 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3433 {
3434 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3435 struct qla_hw_data *ha = vha->hw;
3436 struct qla_tgt_mgmt_cmd *mcmd;
3437 uint32_t lun, unpacked_lun;
3438 int rc;
3439
3440 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3441 if (mcmd == NULL) {
3442 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3443 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3444 vha->vp_idx, __func__);
3445 return -ENOMEM;
3446 }
3447 memset(mcmd, 0, sizeof(*mcmd));
3448
3449 mcmd->sess = sess;
3450 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3451 sizeof(mcmd->orig_iocb.imm_ntfy));
3452
3453 lun = a->u.isp24.fcp_cmnd.lun;
3454 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3455
3456 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3457 le16_to_cpu(iocb->u.isp2x.seq_id));
3458 if (rc != 0) {
3459 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3460 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3461 vha->vp_idx, rc);
3462 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3463 return -EFAULT;
3464 }
3465
3466 return 0;
3467 }
3468
3469 /* ha->hardware_lock supposed to be held on entry */
3470 static int qlt_abort_task(struct scsi_qla_host *vha,
3471 struct imm_ntfy_from_isp *iocb)
3472 {
3473 struct qla_hw_data *ha = vha->hw;
3474 struct qla_tgt_sess *sess;
3475 int loop_id;
3476
3477 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3478
3479 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3480 if (sess == NULL) {
3481 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3482 "qla_target(%d): task abort for unexisting "
3483 "session\n", vha->vp_idx);
3484 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3485 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3486 }
3487
3488 return __qlt_abort_task(vha, iocb, sess);
3489 }
3490
3491 /*
3492 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3493 */
3494 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3495 struct imm_ntfy_from_isp *iocb)
3496 {
3497 int res = 0;
3498
3499 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3500 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3501 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3502
3503 switch (iocb->u.isp24.status_subcode) {
3504 case ELS_PLOGI:
3505 case ELS_FLOGI:
3506 case ELS_PRLI:
3507 case ELS_LOGO:
3508 case ELS_PRLO:
3509 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3510 break;
3511 case ELS_PDISC:
3512 case ELS_ADISC:
3513 {
3514 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3515 if (tgt->link_reinit_iocb_pending) {
3516 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3517 0, 0, 0, 0, 0, 0);
3518 tgt->link_reinit_iocb_pending = 0;
3519 }
3520 res = 1; /* send notify ack */
3521 break;
3522 }
3523
3524 default:
3525 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3526 "qla_target(%d): Unsupported ELS command %x "
3527 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3528 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3529 break;
3530 }
3531
3532 return res;
3533 }
3534
3535 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3536 {
3537 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3538 size_t first_offset = 0, rem_offset = offset, tmp = 0;
3539 int i, sg_srr_cnt, bufflen = 0;
3540
3541 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3542 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3543 "cmd->sg_cnt: %u, direction: %d\n",
3544 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3545
3546 /*
3547 * FIXME: Reject non zero SRR relative offset until we can test
3548 * this code properly.
3549 */
3550 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3551 return -1;
3552
3553 if (!cmd->sg || !cmd->sg_cnt) {
3554 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3555 "Missing cmd->sg or zero cmd->sg_cnt in"
3556 " qla_tgt_set_data_offset\n");
3557 return -EINVAL;
3558 }
3559 /*
3560 * Walk the current cmd->sg list until we locate the new sg_srr_start
3561 */
3562 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3563 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3564 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3565 i, sg, sg_page(sg), sg->length, sg->offset);
3566
3567 if ((sg->length + tmp) > offset) {
3568 first_offset = rem_offset;
3569 sg_srr_start = sg;
3570 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3571 "Found matching sg[%d], using %p as sg_srr_start, "
3572 "and using first_offset: %zu\n", i, sg,
3573 first_offset);
3574 break;
3575 }
3576 tmp += sg->length;
3577 rem_offset -= sg->length;
3578 }
3579
3580 if (!sg_srr_start) {
3581 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3582 "Unable to locate sg_srr_start for offset: %u\n", offset);
3583 return -EINVAL;
3584 }
3585 sg_srr_cnt = (cmd->sg_cnt - i);
3586
3587 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3588 if (!sg_srr) {
3589 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3590 "Unable to allocate sgp\n");
3591 return -ENOMEM;
3592 }
3593 sg_init_table(sg_srr, sg_srr_cnt);
3594 sgp = &sg_srr[0];
3595 /*
3596 * Walk the remaining list for sg_srr_start, mapping to the newly
3597 * allocated sg_srr taking first_offset into account.
3598 */
3599 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3600 if (first_offset) {
3601 sg_set_page(sgp, sg_page(sg),
3602 (sg->length - first_offset), first_offset);
3603 first_offset = 0;
3604 } else {
3605 sg_set_page(sgp, sg_page(sg), sg->length, 0);
3606 }
3607 bufflen += sgp->length;
3608
3609 sgp = sg_next(sgp);
3610 if (!sgp)
3611 break;
3612 }
3613
3614 cmd->sg = sg_srr;
3615 cmd->sg_cnt = sg_srr_cnt;
3616 cmd->bufflen = bufflen;
3617 cmd->offset += offset;
3618 cmd->free_sg = 1;
3619
3620 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3621 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3622 cmd->sg_cnt);
3623 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3624 cmd->bufflen);
3625 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3626 cmd->offset);
3627
3628 if (cmd->sg_cnt < 0)
3629 BUG();
3630
3631 if (cmd->bufflen < 0)
3632 BUG();
3633
3634 return 0;
3635 }
3636
3637 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3638 uint32_t srr_rel_offs, int *xmit_type)
3639 {
3640 int res = 0, rel_offs;
3641
3642 rel_offs = srr_rel_offs - cmd->offset;
3643 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3644 srr_rel_offs, rel_offs);
3645
3646 *xmit_type = QLA_TGT_XMIT_ALL;
3647
3648 if (rel_offs < 0) {
3649 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3650 "qla_target(%d): SRR rel_offs (%d) < 0",
3651 cmd->vha->vp_idx, rel_offs);
3652 res = -1;
3653 } else if (rel_offs == cmd->bufflen)
3654 *xmit_type = QLA_TGT_XMIT_STATUS;
3655 else if (rel_offs > 0)
3656 res = qlt_set_data_offset(cmd, rel_offs);
3657
3658 return res;
3659 }
3660
3661 /* No locks, thread context */
3662 static void qlt_handle_srr(struct scsi_qla_host *vha,
3663 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3664 {
3665 struct imm_ntfy_from_isp *ntfy =
3666 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3667 struct qla_hw_data *ha = vha->hw;
3668 struct qla_tgt_cmd *cmd = sctio->cmd;
3669 struct se_cmd *se_cmd = &cmd->se_cmd;
3670 unsigned long flags;
3671 int xmit_type = 0, resp = 0;
3672 uint32_t offset;
3673 uint16_t srr_ui;
3674
3675 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3676 srr_ui = ntfy->u.isp24.srr_ui;
3677
3678 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3679 cmd, srr_ui);
3680
3681 switch (srr_ui) {
3682 case SRR_IU_STATUS:
3683 spin_lock_irqsave(&ha->hardware_lock, flags);
3684 qlt_send_notify_ack(vha, ntfy,
3685 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3686 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3687 xmit_type = QLA_TGT_XMIT_STATUS;
3688 resp = 1;
3689 break;
3690 case SRR_IU_DATA_IN:
3691 if (!cmd->sg || !cmd->sg_cnt) {
3692 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3693 "Unable to process SRR_IU_DATA_IN due to"
3694 " missing cmd->sg, state: %d\n", cmd->state);
3695 dump_stack();
3696 goto out_reject;
3697 }
3698 if (se_cmd->scsi_status != 0) {
3699 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3700 "Rejecting SRR_IU_DATA_IN with non GOOD "
3701 "scsi_status\n");
3702 goto out_reject;
3703 }
3704 cmd->bufflen = se_cmd->data_length;
3705
3706 if (qlt_has_data(cmd)) {
3707 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3708 goto out_reject;
3709 spin_lock_irqsave(&ha->hardware_lock, flags);
3710 qlt_send_notify_ack(vha, ntfy,
3711 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3712 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3713 resp = 1;
3714 } else {
3715 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3716 "qla_target(%d): SRR for in data for cmd "
3717 "without them (tag %d, SCSI status %d), "
3718 "reject", vha->vp_idx, cmd->tag,
3719 cmd->se_cmd.scsi_status);
3720 goto out_reject;
3721 }
3722 break;
3723 case SRR_IU_DATA_OUT:
3724 if (!cmd->sg || !cmd->sg_cnt) {
3725 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3726 "Unable to process SRR_IU_DATA_OUT due to"
3727 " missing cmd->sg\n");
3728 dump_stack();
3729 goto out_reject;
3730 }
3731 if (se_cmd->scsi_status != 0) {
3732 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3733 "Rejecting SRR_IU_DATA_OUT"
3734 " with non GOOD scsi_status\n");
3735 goto out_reject;
3736 }
3737 cmd->bufflen = se_cmd->data_length;
3738
3739 if (qlt_has_data(cmd)) {
3740 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3741 goto out_reject;
3742 spin_lock_irqsave(&ha->hardware_lock, flags);
3743 qlt_send_notify_ack(vha, ntfy,
3744 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3745 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3746 if (xmit_type & QLA_TGT_XMIT_DATA)
3747 qlt_rdy_to_xfer(cmd);
3748 } else {
3749 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3750 "qla_target(%d): SRR for out data for cmd "
3751 "without them (tag %d, SCSI status %d), "
3752 "reject", vha->vp_idx, cmd->tag,
3753 cmd->se_cmd.scsi_status);
3754 goto out_reject;
3755 }
3756 break;
3757 default:
3758 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3759 "qla_target(%d): Unknown srr_ui value %x",
3760 vha->vp_idx, srr_ui);
3761 goto out_reject;
3762 }
3763
3764 /* Transmit response in case of status and data-in cases */
3765 if (resp)
3766 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3767
3768 return;
3769
3770 out_reject:
3771 spin_lock_irqsave(&ha->hardware_lock, flags);
3772 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3773 NOTIFY_ACK_SRR_FLAGS_REJECT,
3774 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3775 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3776 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3777 cmd->state = QLA_TGT_STATE_DATA_IN;
3778 dump_stack();
3779 } else
3780 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3781 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3782 }
3783
3784 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3785 struct qla_tgt_srr_imm *imm, int ha_locked)
3786 {
3787 struct qla_hw_data *ha = vha->hw;
3788 unsigned long flags = 0;
3789
3790 if (!ha_locked)
3791 spin_lock_irqsave(&ha->hardware_lock, flags);
3792
3793 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3794 NOTIFY_ACK_SRR_FLAGS_REJECT,
3795 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3796 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3797
3798 if (!ha_locked)
3799 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3800
3801 kfree(imm);
3802 }
3803
3804 static void qlt_handle_srr_work(struct work_struct *work)
3805 {
3806 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3807 struct scsi_qla_host *vha = tgt->vha;
3808 struct qla_tgt_srr_ctio *sctio;
3809 unsigned long flags;
3810
3811 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3812 tgt);
3813
3814 restart:
3815 spin_lock_irqsave(&tgt->srr_lock, flags);
3816 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3817 struct qla_tgt_srr_imm *imm, *i, *ti;
3818 struct qla_tgt_cmd *cmd;
3819 struct se_cmd *se_cmd;
3820
3821 imm = NULL;
3822 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3823 srr_list_entry) {
3824 if (i->srr_id == sctio->srr_id) {
3825 list_del(&i->srr_list_entry);
3826 if (imm) {
3827 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3828 "qla_target(%d): There must be "
3829 "only one IMM SRR per CTIO SRR "
3830 "(IMM SRR %p, id %d, CTIO %p\n",
3831 vha->vp_idx, i, i->srr_id, sctio);
3832 qlt_reject_free_srr_imm(tgt->vha, i, 0);
3833 } else
3834 imm = i;
3835 }
3836 }
3837
3838 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3839 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3840 sctio->srr_id);
3841
3842 if (imm == NULL) {
3843 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3844 "Not found matching IMM for SRR CTIO (id %d)\n",
3845 sctio->srr_id);
3846 continue;
3847 } else
3848 list_del(&sctio->srr_list_entry);
3849
3850 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3851
3852 cmd = sctio->cmd;
3853 /*
3854 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3855 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3856 * logic..
3857 */
3858 cmd->offset = 0;
3859 if (cmd->free_sg) {
3860 kfree(cmd->sg);
3861 cmd->sg = NULL;
3862 cmd->free_sg = 0;
3863 }
3864 se_cmd = &cmd->se_cmd;
3865
3866 cmd->sg_cnt = se_cmd->t_data_nents;
3867 cmd->sg = se_cmd->t_data_sg;
3868
3869 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3870 "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3871 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3872 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
3873 cmd->sg_cnt, cmd->offset);
3874
3875 qlt_handle_srr(vha, sctio, imm);
3876
3877 kfree(imm);
3878 kfree(sctio);
3879 goto restart;
3880 }
3881 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3882 }
3883
3884 /* ha->hardware_lock supposed to be held on entry */
3885 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3886 struct imm_ntfy_from_isp *iocb)
3887 {
3888 struct qla_tgt_srr_imm *imm;
3889 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3890 struct qla_tgt_srr_ctio *sctio;
3891
3892 tgt->imm_srr_id++;
3893
3894 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3895 vha->vp_idx);
3896
3897 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3898 if (imm != NULL) {
3899 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3900
3901 /* IRQ is already OFF */
3902 spin_lock(&tgt->srr_lock);
3903 imm->srr_id = tgt->imm_srr_id;
3904 list_add_tail(&imm->srr_list_entry,
3905 &tgt->srr_imm_list);
3906 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3907 "IMM NTFY SRR %p added (id %d, ui %x)\n",
3908 imm, imm->srr_id, iocb->u.isp24.srr_ui);
3909 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3910 int found = 0;
3911 list_for_each_entry(sctio, &tgt->srr_ctio_list,
3912 srr_list_entry) {
3913 if (sctio->srr_id == imm->srr_id) {
3914 found = 1;
3915 break;
3916 }
3917 }
3918 if (found) {
3919 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3920 "Scheduling srr work\n");
3921 schedule_work(&tgt->srr_work);
3922 } else {
3923 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3924 "qla_target(%d): imm_srr_id "
3925 "== ctio_srr_id (%d), but there is no "
3926 "corresponding SRR CTIO, deleting IMM "
3927 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3928 imm);
3929 list_del(&imm->srr_list_entry);
3930
3931 kfree(imm);
3932
3933 spin_unlock(&tgt->srr_lock);
3934 goto out_reject;
3935 }
3936 }
3937 spin_unlock(&tgt->srr_lock);
3938 } else {
3939 struct qla_tgt_srr_ctio *ts;
3940
3941 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3942 "qla_target(%d): Unable to allocate SRR IMM "
3943 "entry, SRR request will be rejected\n", vha->vp_idx);
3944
3945 /* IRQ is already OFF */
3946 spin_lock(&tgt->srr_lock);
3947 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3948 srr_list_entry) {
3949 if (sctio->srr_id == tgt->imm_srr_id) {
3950 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3951 "CTIO SRR %p deleted (id %d)\n",
3952 sctio, sctio->srr_id);
3953 list_del(&sctio->srr_list_entry);
3954 qlt_send_term_exchange(vha, sctio->cmd,
3955 &sctio->cmd->atio, 1);
3956 kfree(sctio);
3957 }
3958 }
3959 spin_unlock(&tgt->srr_lock);
3960 goto out_reject;
3961 }
3962
3963 return;
3964
3965 out_reject:
3966 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3967 NOTIFY_ACK_SRR_FLAGS_REJECT,
3968 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3969 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3970 }
3971
3972 /*
3973 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3974 */
3975 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3976 struct imm_ntfy_from_isp *iocb)
3977 {
3978 struct qla_hw_data *ha = vha->hw;
3979 uint32_t add_flags = 0;
3980 int send_notify_ack = 1;
3981 uint16_t status;
3982
3983 status = le16_to_cpu(iocb->u.isp2x.status);
3984 switch (status) {
3985 case IMM_NTFY_LIP_RESET:
3986 {
3987 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3988 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3989 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3990 iocb->u.isp24.status_subcode);
3991
3992 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3993 send_notify_ack = 0;
3994 break;
3995 }
3996
3997 case IMM_NTFY_LIP_LINK_REINIT:
3998 {
3999 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4000 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4001 "qla_target(%d): LINK REINIT (loop %#x, "
4002 "subcode %x)\n", vha->vp_idx,
4003 le16_to_cpu(iocb->u.isp24.nport_handle),
4004 iocb->u.isp24.status_subcode);
4005 if (tgt->link_reinit_iocb_pending) {
4006 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4007 0, 0, 0, 0, 0, 0);
4008 }
4009 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4010 tgt->link_reinit_iocb_pending = 1;
4011 /*
4012 * QLogic requires to wait after LINK REINIT for possible
4013 * PDISC or ADISC ELS commands
4014 */
4015 send_notify_ack = 0;
4016 break;
4017 }
4018
4019 case IMM_NTFY_PORT_LOGOUT:
4020 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4021 "qla_target(%d): Port logout (loop "
4022 "%#x, subcode %x)\n", vha->vp_idx,
4023 le16_to_cpu(iocb->u.isp24.nport_handle),
4024 iocb->u.isp24.status_subcode);
4025
4026 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4027 send_notify_ack = 0;
4028 /* The sessions will be cleared in the callback, if needed */
4029 break;
4030
4031 case IMM_NTFY_GLBL_TPRLO:
4032 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4033 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4034 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4035 send_notify_ack = 0;
4036 /* The sessions will be cleared in the callback, if needed */
4037 break;
4038
4039 case IMM_NTFY_PORT_CONFIG:
4040 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4041 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4042 status);
4043 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4044 send_notify_ack = 0;
4045 /* The sessions will be cleared in the callback, if needed */
4046 break;
4047
4048 case IMM_NTFY_GLBL_LOGO:
4049 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4050 "qla_target(%d): Link failure detected\n",
4051 vha->vp_idx);
4052 /* I_T nexus loss */
4053 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4054 send_notify_ack = 0;
4055 break;
4056
4057 case IMM_NTFY_IOCB_OVERFLOW:
4058 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4059 "qla_target(%d): Cannot provide requested "
4060 "capability (IOCB overflowed the immediate notify "
4061 "resource count)\n", vha->vp_idx);
4062 break;
4063
4064 case IMM_NTFY_ABORT_TASK:
4065 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4066 "qla_target(%d): Abort Task (S %08x I %#x -> "
4067 "L %#x)\n", vha->vp_idx,
4068 le16_to_cpu(iocb->u.isp2x.seq_id),
4069 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4070 le16_to_cpu(iocb->u.isp2x.lun));
4071 if (qlt_abort_task(vha, iocb) == 0)
4072 send_notify_ack = 0;
4073 break;
4074
4075 case IMM_NTFY_RESOURCE:
4076 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4077 "qla_target(%d): Out of resources, host %ld\n",
4078 vha->vp_idx, vha->host_no);
4079 break;
4080
4081 case IMM_NTFY_MSG_RX:
4082 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4083 "qla_target(%d): Immediate notify task %x\n",
4084 vha->vp_idx, iocb->u.isp2x.task_flags);
4085 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4086 send_notify_ack = 0;
4087 break;
4088
4089 case IMM_NTFY_ELS:
4090 if (qlt_24xx_handle_els(vha, iocb) == 0)
4091 send_notify_ack = 0;
4092 break;
4093
4094 case IMM_NTFY_SRR:
4095 qlt_prepare_srr_imm(vha, iocb);
4096 send_notify_ack = 0;
4097 break;
4098
4099 default:
4100 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4101 "qla_target(%d): Received unknown immediate "
4102 "notify status %x\n", vha->vp_idx, status);
4103 break;
4104 }
4105
4106 if (send_notify_ack)
4107 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4108 }
4109
4110 /*
4111 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4112 * This function sends busy to ISP 2xxx or 24xx.
4113 */
4114 static void qlt_send_busy(struct scsi_qla_host *vha,
4115 struct atio_from_isp *atio, uint16_t status)
4116 {
4117 struct ctio7_to_24xx *ctio24;
4118 struct qla_hw_data *ha = vha->hw;
4119 request_t *pkt;
4120 struct qla_tgt_sess *sess = NULL;
4121
4122 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4123 atio->u.isp24.fcp_hdr.s_id);
4124 if (!sess) {
4125 qlt_send_term_exchange(vha, NULL, atio, 1);
4126 return;
4127 }
4128 /* Sending marker isn't necessary, since we called from ISR */
4129
4130 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4131 if (!pkt) {
4132 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
4133 "qla_target(%d): %s failed: unable to allocate "
4134 "request packet", vha->vp_idx, __func__);
4135 return;
4136 }
4137
4138 pkt->entry_count = 1;
4139 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4140
4141 ctio24 = (struct ctio7_to_24xx *)pkt;
4142 ctio24->entry_type = CTIO_TYPE7;
4143 ctio24->nport_handle = sess->loop_id;
4144 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4145 ctio24->vp_index = vha->vp_idx;
4146 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4147 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4148 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4149 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4150 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4151 __constant_cpu_to_le16(
4152 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4153 CTIO7_FLAGS_DONT_RET_CTIO);
4154 /*
4155 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4156 * if the explicit conformation is used.
4157 */
4158 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4159 ctio24->u.status1.scsi_status = cpu_to_le16(status);
4160 ctio24->u.status1.residual = get_unaligned((uint32_t *)
4161 &atio->u.isp24.fcp_cmnd.add_cdb[
4162 atio->u.isp24.fcp_cmnd.add_cdb_len]);
4163 if (ctio24->u.status1.residual != 0)
4164 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
4165
4166 qla2x00_start_iocbs(vha, vha->req);
4167 }
4168
4169 /* ha->hardware_lock supposed to be held on entry */
4170 /* called via callback from qla2xxx */
4171 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4172 struct atio_from_isp *atio)
4173 {
4174 struct qla_hw_data *ha = vha->hw;
4175 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4176 int rc;
4177
4178 if (unlikely(tgt == NULL)) {
4179 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
4180 "ATIO pkt, but no tgt (ha %p)", ha);
4181 return;
4182 }
4183 ql_dbg(ql_dbg_tgt, vha, 0xe02c,
4184 "qla_target(%d): ATIO pkt %p: type %02x count %02x",
4185 vha->vp_idx, atio, atio->u.raw.entry_type,
4186 atio->u.raw.entry_count);
4187 /*
4188 * In tgt_stop mode we also should allow all requests to pass.
4189 * Otherwise, some commands can stuck.
4190 */
4191
4192 tgt->irq_cmd_count++;
4193
4194 switch (atio->u.raw.entry_type) {
4195 case ATIO_TYPE7:
4196 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
4197 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, cdb %x, add_cdb_len %x, data_length %04x, s_id %02x%02x%02x\n",
4198 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
4199 atio->u.isp24.fcp_cmnd.rddata,
4200 atio->u.isp24.fcp_cmnd.wrdata,
4201 atio->u.isp24.fcp_cmnd.cdb[0],
4202 atio->u.isp24.fcp_cmnd.add_cdb_len,
4203 be32_to_cpu(get_unaligned((uint32_t *)
4204 &atio->u.isp24.fcp_cmnd.add_cdb[
4205 atio->u.isp24.fcp_cmnd.add_cdb_len])),
4206 atio->u.isp24.fcp_hdr.s_id[0],
4207 atio->u.isp24.fcp_hdr.s_id[1],
4208 atio->u.isp24.fcp_hdr.s_id[2]);
4209
4210 if (unlikely(atio->u.isp24.exchange_addr ==
4211 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4212 ql_dbg(ql_dbg_tgt, vha, 0xe058,
4213 "qla_target(%d): ATIO_TYPE7 "
4214 "received with UNKNOWN exchange address, "
4215 "sending QUEUE_FULL\n", vha->vp_idx);
4216 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4217 break;
4218 }
4219 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
4220 rc = qlt_handle_cmd_for_atio(vha, atio);
4221 else
4222 rc = qlt_handle_task_mgmt(vha, atio);
4223 if (unlikely(rc != 0)) {
4224 if (rc == -ESRCH) {
4225 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4226 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4227 #else
4228 qlt_send_term_exchange(vha, NULL, atio, 1);
4229 #endif
4230 } else {
4231 if (tgt->tgt_stop) {
4232 ql_dbg(ql_dbg_tgt, vha, 0xe059,
4233 "qla_target: Unable to send "
4234 "command to target for req, "
4235 "ignoring.\n");
4236 } else {
4237 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4238 "qla_target(%d): Unable to send "
4239 "command to target, sending BUSY "
4240 "status.\n", vha->vp_idx);
4241 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4242 }
4243 }
4244 }
4245 break;
4246
4247 case IMMED_NOTIFY_TYPE:
4248 {
4249 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4250 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4251 "qla_target(%d): Received ATIO packet %x "
4252 "with error status %x\n", vha->vp_idx,
4253 atio->u.raw.entry_type,
4254 atio->u.isp2x.entry_status);
4255 break;
4256 }
4257 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4258 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4259 break;
4260 }
4261
4262 default:
4263 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4264 "qla_target(%d): Received unknown ATIO atio "
4265 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4266 break;
4267 }
4268
4269 tgt->irq_cmd_count--;
4270 }
4271
4272 /* ha->hardware_lock supposed to be held on entry */
4273 /* called via callback from qla2xxx */
4274 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4275 {
4276 struct qla_hw_data *ha = vha->hw;
4277 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4278
4279 if (unlikely(tgt == NULL)) {
4280 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4281 "qla_target(%d): Response pkt %x received, but no "
4282 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4283 return;
4284 }
4285
4286 ql_dbg(ql_dbg_tgt, vha, 0xe02f,
4287 "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
4288 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
4289 pkt->entry_count, pkt->entry_status, pkt->handle);
4290
4291 /*
4292 * In tgt_stop mode we also should allow all requests to pass.
4293 * Otherwise, some commands can stuck.
4294 */
4295
4296 tgt->irq_cmd_count++;
4297
4298 switch (pkt->entry_type) {
4299 case CTIO_CRC2:
4300 case CTIO_TYPE7:
4301 {
4302 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4303 ql_dbg(ql_dbg_tgt, vha, 0xe030,
4304 "CTIO[0x%x] 12/CTIO7 7A/CRC2: instance %d\n",
4305 entry->entry_type, vha->vp_idx);
4306 qlt_do_ctio_completion(vha, entry->handle,
4307 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4308 entry);
4309 break;
4310 }
4311
4312 case ACCEPT_TGT_IO_TYPE:
4313 {
4314 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4315 int rc;
4316 ql_dbg(ql_dbg_tgt, vha, 0xe031,
4317 "ACCEPT_TGT_IO instance %d status %04x "
4318 "lun %04x read/write %d data_length %04x "
4319 "target_id %02x rx_id %04x\n ", vha->vp_idx,
4320 le16_to_cpu(atio->u.isp2x.status),
4321 le16_to_cpu(atio->u.isp2x.lun),
4322 atio->u.isp2x.execution_codes,
4323 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
4324 atio), atio->u.isp2x.rx_id);
4325 if (atio->u.isp2x.status !=
4326 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4327 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4328 "qla_target(%d): ATIO with error "
4329 "status %x received\n", vha->vp_idx,
4330 le16_to_cpu(atio->u.isp2x.status));
4331 break;
4332 }
4333 ql_dbg(ql_dbg_tgt, vha, 0xe032,
4334 "FCP CDB: 0x%02x, sizeof(cdb): %lu",
4335 atio->u.isp2x.cdb[0], (unsigned long
4336 int)sizeof(atio->u.isp2x.cdb));
4337
4338 rc = qlt_handle_cmd_for_atio(vha, atio);
4339 if (unlikely(rc != 0)) {
4340 if (rc == -ESRCH) {
4341 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4342 qlt_send_busy(vha, atio, 0);
4343 #else
4344 qlt_send_term_exchange(vha, NULL, atio, 1);
4345 #endif
4346 } else {
4347 if (tgt->tgt_stop) {
4348 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4349 "qla_target: Unable to send "
4350 "command to target, sending TERM "
4351 "EXCHANGE for rsp\n");
4352 qlt_send_term_exchange(vha, NULL,
4353 atio, 1);
4354 } else {
4355 ql_dbg(ql_dbg_tgt, vha, 0xe060,
4356 "qla_target(%d): Unable to send "
4357 "command to target, sending BUSY "
4358 "status\n", vha->vp_idx);
4359 qlt_send_busy(vha, atio, 0);
4360 }
4361 }
4362 }
4363 }
4364 break;
4365
4366 case CONTINUE_TGT_IO_TYPE:
4367 {
4368 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4369 ql_dbg(ql_dbg_tgt, vha, 0xe033,
4370 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
4371 qlt_do_ctio_completion(vha, entry->handle,
4372 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4373 entry);
4374 break;
4375 }
4376
4377 case CTIO_A64_TYPE:
4378 {
4379 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4380 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
4381 vha->vp_idx);
4382 qlt_do_ctio_completion(vha, entry->handle,
4383 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4384 entry);
4385 break;
4386 }
4387
4388 case IMMED_NOTIFY_TYPE:
4389 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4390 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4391 break;
4392
4393 case NOTIFY_ACK_TYPE:
4394 if (tgt->notify_ack_expected > 0) {
4395 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4396 ql_dbg(ql_dbg_tgt, vha, 0xe036,
4397 "NOTIFY_ACK seq %08x status %x\n",
4398 le16_to_cpu(entry->u.isp2x.seq_id),
4399 le16_to_cpu(entry->u.isp2x.status));
4400 tgt->notify_ack_expected--;
4401 if (entry->u.isp2x.status !=
4402 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4403 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4404 "qla_target(%d): NOTIFY_ACK "
4405 "failed %x\n", vha->vp_idx,
4406 le16_to_cpu(entry->u.isp2x.status));
4407 }
4408 } else {
4409 ql_dbg(ql_dbg_tgt, vha, 0xe062,
4410 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4411 vha->vp_idx);
4412 }
4413 break;
4414
4415 case ABTS_RECV_24XX:
4416 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4417 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4418 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4419 break;
4420
4421 case ABTS_RESP_24XX:
4422 if (tgt->abts_resp_expected > 0) {
4423 struct abts_resp_from_24xx_fw *entry =
4424 (struct abts_resp_from_24xx_fw *)pkt;
4425 ql_dbg(ql_dbg_tgt, vha, 0xe038,
4426 "ABTS_RESP_24XX: compl_status %x\n",
4427 entry->compl_status);
4428 tgt->abts_resp_expected--;
4429 if (le16_to_cpu(entry->compl_status) !=
4430 ABTS_RESP_COMPL_SUCCESS) {
4431 if ((entry->error_subcode1 == 0x1E) &&
4432 (entry->error_subcode2 == 0)) {
4433 /*
4434 * We've got a race here: aborted
4435 * exchange not terminated, i.e.
4436 * response for the aborted command was
4437 * sent between the abort request was
4438 * received and processed.
4439 * Unfortunately, the firmware has a
4440 * silly requirement that all aborted
4441 * exchanges must be explicitely
4442 * terminated, otherwise it refuses to
4443 * send responses for the abort
4444 * requests. So, we have to
4445 * (re)terminate the exchange and retry
4446 * the abort response.
4447 */
4448 qlt_24xx_retry_term_exchange(vha,
4449 entry);
4450 } else
4451 ql_dbg(ql_dbg_tgt, vha, 0xe063,
4452 "qla_target(%d): ABTS_RESP_24XX "
4453 "failed %x (subcode %x:%x)",
4454 vha->vp_idx, entry->compl_status,
4455 entry->error_subcode1,
4456 entry->error_subcode2);
4457 }
4458 } else {
4459 ql_dbg(ql_dbg_tgt, vha, 0xe064,
4460 "qla_target(%d): Unexpected ABTS_RESP_24XX "
4461 "received\n", vha->vp_idx);
4462 }
4463 break;
4464
4465 default:
4466 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4467 "qla_target(%d): Received unknown response pkt "
4468 "type %x\n", vha->vp_idx, pkt->entry_type);
4469 break;
4470 }
4471
4472 tgt->irq_cmd_count--;
4473 }
4474
4475 /*
4476 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4477 */
4478 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4479 uint16_t *mailbox)
4480 {
4481 struct qla_hw_data *ha = vha->hw;
4482 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4483 int login_code;
4484
4485 ql_dbg(ql_dbg_tgt, vha, 0xe039,
4486 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
4487 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
4488 ha->operating_mode, ha->current_topology);
4489
4490 if (!ha->tgt.tgt_ops)
4491 return;
4492
4493 if (unlikely(tgt == NULL)) {
4494 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4495 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4496 return;
4497 }
4498
4499 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4500 IS_QLA2100(ha))
4501 return;
4502 /*
4503 * In tgt_stop mode we also should allow all requests to pass.
4504 * Otherwise, some commands can stuck.
4505 */
4506
4507 tgt->irq_cmd_count++;
4508
4509 switch (code) {
4510 case MBA_RESET: /* Reset */
4511 case MBA_SYSTEM_ERR: /* System Error */
4512 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
4513 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
4514 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4515 "qla_target(%d): System error async event %#x "
4516 "occurred", vha->vp_idx, code);
4517 break;
4518 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
4519 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4520 break;
4521
4522 case MBA_LOOP_UP:
4523 {
4524 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4525 "qla_target(%d): Async LOOP_UP occurred "
4526 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4527 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4528 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4529 if (tgt->link_reinit_iocb_pending) {
4530 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4531 0, 0, 0, 0, 0, 0);
4532 tgt->link_reinit_iocb_pending = 0;
4533 }
4534 break;
4535 }
4536
4537 case MBA_LIP_OCCURRED:
4538 case MBA_LOOP_DOWN:
4539 case MBA_LIP_RESET:
4540 case MBA_RSCN_UPDATE:
4541 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4542 "qla_target(%d): Async event %#x occurred "
4543 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4544 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4545 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4546 break;
4547
4548 case MBA_PORT_UPDATE:
4549 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4550 "qla_target(%d): Port update async event %#x "
4551 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4552 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4553 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4554 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4555
4556 login_code = le16_to_cpu(mailbox[2]);
4557 if (login_code == 0x4)
4558 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4559 "Async MB 2: Got PLOGI Complete\n");
4560 else if (login_code == 0x7)
4561 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4562 "Async MB 2: Port Logged Out\n");
4563 break;
4564
4565 default:
4566 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4567 "qla_target(%d): Async event %#x occurred: "
4568 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4569 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4570 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4571 break;
4572 }
4573
4574 tgt->irq_cmd_count--;
4575 }
4576
4577 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4578 uint16_t loop_id)
4579 {
4580 fc_port_t *fcport;
4581 int rc;
4582
4583 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4584 if (!fcport) {
4585 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4586 "qla_target(%d): Allocation of tmp FC port failed",
4587 vha->vp_idx);
4588 return NULL;
4589 }
4590
4591 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4592
4593 fcport->loop_id = loop_id;
4594
4595 rc = qla2x00_get_port_database(vha, fcport, 0);
4596 if (rc != QLA_SUCCESS) {
4597 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4598 "qla_target(%d): Failed to retrieve fcport "
4599 "information -- get_port_database() returned %x "
4600 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4601 kfree(fcport);
4602 return NULL;
4603 }
4604
4605 return fcport;
4606 }
4607
4608 /* Must be called under tgt_mutex */
4609 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4610 uint8_t *s_id)
4611 {
4612 struct qla_tgt_sess *sess = NULL;
4613 fc_port_t *fcport = NULL;
4614 int rc, global_resets;
4615 uint16_t loop_id = 0;
4616
4617 retry:
4618 global_resets =
4619 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4620
4621 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4622 if (rc != 0) {
4623 if ((s_id[0] == 0xFF) &&
4624 (s_id[1] == 0xFC)) {
4625 /*
4626 * This is Domain Controller, so it should be
4627 * OK to drop SCSI commands from it.
4628 */
4629 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4630 "Unable to find initiator with S_ID %x:%x:%x",
4631 s_id[0], s_id[1], s_id[2]);
4632 } else
4633 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4634 "qla_target(%d): Unable to find "
4635 "initiator with S_ID %x:%x:%x",
4636 vha->vp_idx, s_id[0], s_id[1],
4637 s_id[2]);
4638 return NULL;
4639 }
4640
4641 fcport = qlt_get_port_database(vha, loop_id);
4642 if (!fcport)
4643 return NULL;
4644
4645 if (global_resets !=
4646 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4647 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4648 "qla_target(%d): global reset during session discovery "
4649 "(counter was %d, new %d), retrying", vha->vp_idx,
4650 global_resets,
4651 atomic_read(&vha->vha_tgt.
4652 qla_tgt->tgt_global_resets_count));
4653 goto retry;
4654 }
4655
4656 sess = qlt_create_sess(vha, fcport, true);
4657
4658 kfree(fcport);
4659 return sess;
4660 }
4661
4662 static void qlt_abort_work(struct qla_tgt *tgt,
4663 struct qla_tgt_sess_work_param *prm)
4664 {
4665 struct scsi_qla_host *vha = tgt->vha;
4666 struct qla_hw_data *ha = vha->hw;
4667 struct qla_tgt_sess *sess = NULL;
4668 unsigned long flags;
4669 uint32_t be_s_id;
4670 uint8_t s_id[3];
4671 int rc;
4672
4673 spin_lock_irqsave(&ha->hardware_lock, flags);
4674
4675 if (tgt->tgt_stop)
4676 goto out_term;
4677
4678 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4679 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4680 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4681
4682 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4683 (unsigned char *)&be_s_id);
4684 if (!sess) {
4685 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4686
4687 mutex_lock(&vha->vha_tgt.tgt_mutex);
4688 sess = qlt_make_local_sess(vha, s_id);
4689 /* sess has got an extra creation ref */
4690 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4691
4692 spin_lock_irqsave(&ha->hardware_lock, flags);
4693 if (!sess)
4694 goto out_term;
4695 } else {
4696 kref_get(&sess->se_sess->sess_kref);
4697 }
4698
4699 if (tgt->tgt_stop)
4700 goto out_term;
4701
4702 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4703 if (rc != 0)
4704 goto out_term;
4705
4706 ha->tgt.tgt_ops->put_sess(sess);
4707 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4708 return;
4709
4710 out_term:
4711 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4712 if (sess)
4713 ha->tgt.tgt_ops->put_sess(sess);
4714 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4715 }
4716
4717 static void qlt_tmr_work(struct qla_tgt *tgt,
4718 struct qla_tgt_sess_work_param *prm)
4719 {
4720 struct atio_from_isp *a = &prm->tm_iocb2;
4721 struct scsi_qla_host *vha = tgt->vha;
4722 struct qla_hw_data *ha = vha->hw;
4723 struct qla_tgt_sess *sess = NULL;
4724 unsigned long flags;
4725 uint8_t *s_id = NULL; /* to hide compiler warnings */
4726 int rc;
4727 uint32_t lun, unpacked_lun;
4728 int lun_size, fn;
4729 void *iocb;
4730
4731 spin_lock_irqsave(&ha->hardware_lock, flags);
4732
4733 if (tgt->tgt_stop)
4734 goto out_term;
4735
4736 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4737 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4738 if (!sess) {
4739 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4740
4741 mutex_lock(&vha->vha_tgt.tgt_mutex);
4742 sess = qlt_make_local_sess(vha, s_id);
4743 /* sess has got an extra creation ref */
4744 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4745
4746 spin_lock_irqsave(&ha->hardware_lock, flags);
4747 if (!sess)
4748 goto out_term;
4749 } else {
4750 kref_get(&sess->se_sess->sess_kref);
4751 }
4752
4753 iocb = a;
4754 lun = a->u.isp24.fcp_cmnd.lun;
4755 lun_size = sizeof(lun);
4756 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4757 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4758
4759 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4760 if (rc != 0)
4761 goto out_term;
4762
4763 ha->tgt.tgt_ops->put_sess(sess);
4764 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4765 return;
4766
4767 out_term:
4768 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4769 if (sess)
4770 ha->tgt.tgt_ops->put_sess(sess);
4771 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4772 }
4773
4774 static void qlt_sess_work_fn(struct work_struct *work)
4775 {
4776 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4777 struct scsi_qla_host *vha = tgt->vha;
4778 unsigned long flags;
4779
4780 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4781
4782 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4783 while (!list_empty(&tgt->sess_works_list)) {
4784 struct qla_tgt_sess_work_param *prm = list_entry(
4785 tgt->sess_works_list.next, typeof(*prm),
4786 sess_works_list_entry);
4787
4788 /*
4789 * This work can be scheduled on several CPUs at time, so we
4790 * must delete the entry to eliminate double processing
4791 */
4792 list_del(&prm->sess_works_list_entry);
4793
4794 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4795
4796 switch (prm->type) {
4797 case QLA_TGT_SESS_WORK_ABORT:
4798 qlt_abort_work(tgt, prm);
4799 break;
4800 case QLA_TGT_SESS_WORK_TM:
4801 qlt_tmr_work(tgt, prm);
4802 break;
4803 default:
4804 BUG_ON(1);
4805 break;
4806 }
4807
4808 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4809
4810 kfree(prm);
4811 }
4812 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4813 }
4814
4815 /* Must be called under tgt_host_action_mutex */
4816 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4817 {
4818 struct qla_tgt *tgt;
4819
4820 if (!QLA_TGT_MODE_ENABLED())
4821 return 0;
4822
4823 if (!IS_TGT_MODE_CAPABLE(ha)) {
4824 ql_log(ql_log_warn, base_vha, 0xe070,
4825 "This adapter does not support target mode.\n");
4826 return 0;
4827 }
4828
4829 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4830 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
4831
4832 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
4833
4834 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4835 if (!tgt) {
4836 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4837 "Unable to allocate struct qla_tgt\n");
4838 return -ENOMEM;
4839 }
4840
4841 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4842 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4843
4844 tgt->ha = ha;
4845 tgt->vha = base_vha;
4846 init_waitqueue_head(&tgt->waitQ);
4847 INIT_LIST_HEAD(&tgt->sess_list);
4848 INIT_LIST_HEAD(&tgt->del_sess_list);
4849 INIT_DELAYED_WORK(&tgt->sess_del_work,
4850 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4851 spin_lock_init(&tgt->sess_work_lock);
4852 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4853 INIT_LIST_HEAD(&tgt->sess_works_list);
4854 spin_lock_init(&tgt->srr_lock);
4855 INIT_LIST_HEAD(&tgt->srr_ctio_list);
4856 INIT_LIST_HEAD(&tgt->srr_imm_list);
4857 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4858 atomic_set(&tgt->tgt_global_resets_count, 0);
4859
4860 base_vha->vha_tgt.qla_tgt = tgt;
4861
4862 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4863 "qla_target(%d): using 64 Bit PCI addressing",
4864 base_vha->vp_idx);
4865 tgt->tgt_enable_64bit_addr = 1;
4866 /* 3 is reserved */
4867 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4868 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4869 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4870
4871 if (base_vha->fc_vport)
4872 return 0;
4873
4874 mutex_lock(&qla_tgt_mutex);
4875 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4876 mutex_unlock(&qla_tgt_mutex);
4877
4878 return 0;
4879 }
4880
4881 /* Must be called under tgt_host_action_mutex */
4882 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4883 {
4884 if (!vha->vha_tgt.qla_tgt)
4885 return 0;
4886
4887 if (vha->fc_vport) {
4888 qlt_release(vha->vha_tgt.qla_tgt);
4889 return 0;
4890 }
4891 mutex_lock(&qla_tgt_mutex);
4892 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
4893 mutex_unlock(&qla_tgt_mutex);
4894
4895 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4896 vha->host_no, ha);
4897 qlt_release(vha->vha_tgt.qla_tgt);
4898
4899 return 0;
4900 }
4901
4902 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4903 unsigned char *b)
4904 {
4905 int i;
4906
4907 pr_debug("qla2xxx HW vha->node_name: ");
4908 for (i = 0; i < WWN_SIZE; i++)
4909 pr_debug("%02x ", vha->node_name[i]);
4910 pr_debug("\n");
4911 pr_debug("qla2xxx HW vha->port_name: ");
4912 for (i = 0; i < WWN_SIZE; i++)
4913 pr_debug("%02x ", vha->port_name[i]);
4914 pr_debug("\n");
4915
4916 pr_debug("qla2xxx passed configfs WWPN: ");
4917 put_unaligned_be64(wwpn, b);
4918 for (i = 0; i < WWN_SIZE; i++)
4919 pr_debug("%02x ", b[i]);
4920 pr_debug("\n");
4921 }
4922
4923 /**
4924 * qla_tgt_lport_register - register lport with external module
4925 *
4926 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4927 * @wwpn: Passwd FC target WWPN
4928 * @callback: lport initialization callback for tcm_qla2xxx code
4929 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4930 */
4931 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
4932 u64 npiv_wwpn, u64 npiv_wwnn,
4933 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
4934 {
4935 struct qla_tgt *tgt;
4936 struct scsi_qla_host *vha;
4937 struct qla_hw_data *ha;
4938 struct Scsi_Host *host;
4939 unsigned long flags;
4940 int rc;
4941 u8 b[WWN_SIZE];
4942
4943 mutex_lock(&qla_tgt_mutex);
4944 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4945 vha = tgt->vha;
4946 ha = vha->hw;
4947
4948 host = vha->host;
4949 if (!host)
4950 continue;
4951
4952 if (!(host->hostt->supported_mode & MODE_TARGET))
4953 continue;
4954
4955 spin_lock_irqsave(&ha->hardware_lock, flags);
4956 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
4957 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4958 host->host_no);
4959 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4960 continue;
4961 }
4962 if (tgt->tgt_stop) {
4963 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
4964 host->host_no);
4965 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4966 continue;
4967 }
4968 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4969
4970 if (!scsi_host_get(host)) {
4971 ql_dbg(ql_dbg_tgt, vha, 0xe068,
4972 "Unable to scsi_host_get() for"
4973 " qla2xxx scsi_host\n");
4974 continue;
4975 }
4976 qlt_lport_dump(vha, phys_wwpn, b);
4977
4978 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4979 scsi_host_put(host);
4980 continue;
4981 }
4982 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
4983 if (rc != 0)
4984 scsi_host_put(host);
4985
4986 mutex_unlock(&qla_tgt_mutex);
4987 return rc;
4988 }
4989 mutex_unlock(&qla_tgt_mutex);
4990
4991 return -ENODEV;
4992 }
4993 EXPORT_SYMBOL(qlt_lport_register);
4994
4995 /**
4996 * qla_tgt_lport_deregister - Degister lport
4997 *
4998 * @vha: Registered scsi_qla_host pointer
4999 */
5000 void qlt_lport_deregister(struct scsi_qla_host *vha)
5001 {
5002 struct qla_hw_data *ha = vha->hw;
5003 struct Scsi_Host *sh = vha->host;
5004 /*
5005 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5006 */
5007 vha->vha_tgt.target_lport_ptr = NULL;
5008 ha->tgt.tgt_ops = NULL;
5009 /*
5010 * Release the Scsi_Host reference for the underlying qla2xxx host
5011 */
5012 scsi_host_put(sh);
5013 }
5014 EXPORT_SYMBOL(qlt_lport_deregister);
5015
5016 /* Must be called under HW lock */
5017 void qlt_set_mode(struct scsi_qla_host *vha)
5018 {
5019 struct qla_hw_data *ha = vha->hw;
5020
5021 switch (ql2x_ini_mode) {
5022 case QLA2XXX_INI_MODE_DISABLED:
5023 case QLA2XXX_INI_MODE_EXCLUSIVE:
5024 vha->host->active_mode = MODE_TARGET;
5025 break;
5026 case QLA2XXX_INI_MODE_ENABLED:
5027 vha->host->active_mode |= MODE_TARGET;
5028 break;
5029 default:
5030 break;
5031 }
5032
5033 if (ha->tgt.ini_mode_force_reverse)
5034 qla_reverse_ini_mode(vha);
5035 }
5036
5037 /* Must be called under HW lock */
5038 void qlt_clear_mode(struct scsi_qla_host *vha)
5039 {
5040 struct qla_hw_data *ha = vha->hw;
5041
5042 switch (ql2x_ini_mode) {
5043 case QLA2XXX_INI_MODE_DISABLED:
5044 vha->host->active_mode = MODE_UNKNOWN;
5045 break;
5046 case QLA2XXX_INI_MODE_EXCLUSIVE:
5047 vha->host->active_mode = MODE_INITIATOR;
5048 break;
5049 case QLA2XXX_INI_MODE_ENABLED:
5050 vha->host->active_mode &= ~MODE_TARGET;
5051 break;
5052 default:
5053 break;
5054 }
5055
5056 if (ha->tgt.ini_mode_force_reverse)
5057 qla_reverse_ini_mode(vha);
5058 }
5059
5060 /*
5061 * qla_tgt_enable_vha - NO LOCK HELD
5062 *
5063 * host_reset, bring up w/ Target Mode Enabled
5064 */
5065 void
5066 qlt_enable_vha(struct scsi_qla_host *vha)
5067 {
5068 struct qla_hw_data *ha = vha->hw;
5069 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5070 unsigned long flags;
5071 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5072
5073 if (!tgt) {
5074 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5075 "Unable to locate qla_tgt pointer from"
5076 " struct qla_hw_data\n");
5077 dump_stack();
5078 return;
5079 }
5080
5081 spin_lock_irqsave(&ha->hardware_lock, flags);
5082 tgt->tgt_stopped = 0;
5083 qlt_set_mode(vha);
5084 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5085
5086 if (vha->vp_idx) {
5087 qla24xx_disable_vp(vha);
5088 qla24xx_enable_vp(vha);
5089 } else {
5090 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5091 qla2xxx_wake_dpc(base_vha);
5092 qla2x00_wait_for_hba_online(base_vha);
5093 }
5094 }
5095 EXPORT_SYMBOL(qlt_enable_vha);
5096
5097 /*
5098 * qla_tgt_disable_vha - NO LOCK HELD
5099 *
5100 * Disable Target Mode and reset the adapter
5101 */
5102 void
5103 qlt_disable_vha(struct scsi_qla_host *vha)
5104 {
5105 struct qla_hw_data *ha = vha->hw;
5106 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5107 unsigned long flags;
5108
5109 if (!tgt) {
5110 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5111 "Unable to locate qla_tgt pointer from"
5112 " struct qla_hw_data\n");
5113 dump_stack();
5114 return;
5115 }
5116
5117 spin_lock_irqsave(&ha->hardware_lock, flags);
5118 qlt_clear_mode(vha);
5119 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5120
5121 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5122 qla2xxx_wake_dpc(vha);
5123 qla2x00_wait_for_hba_online(vha);
5124 }
5125
5126 /*
5127 * Called from qla_init.c:qla24xx_vport_create() contex to setup
5128 * the target mode specific struct scsi_qla_host and struct qla_hw_data
5129 * members.
5130 */
5131 void
5132 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5133 {
5134 if (!qla_tgt_mode_enabled(vha))
5135 return;
5136
5137 vha->vha_tgt.qla_tgt = NULL;
5138
5139 mutex_init(&vha->vha_tgt.tgt_mutex);
5140 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5141
5142 qlt_clear_mode(vha);
5143
5144 /*
5145 * NOTE: Currently the value is kept the same for <24xx and
5146 * >=24xx ISPs. If it is necessary to change it,
5147 * the check should be added for specific ISPs,
5148 * assigning the value appropriately.
5149 */
5150 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5151
5152 qlt_add_target(ha, vha);
5153 }
5154
5155 void
5156 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5157 {
5158 /*
5159 * FC-4 Feature bit 0 indicates target functionality to the name server.
5160 */
5161 if (qla_tgt_mode_enabled(vha)) {
5162 if (qla_ini_mode_enabled(vha))
5163 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5164 else
5165 ct_req->req.rff_id.fc4_feature = BIT_0;
5166 } else if (qla_ini_mode_enabled(vha)) {
5167 ct_req->req.rff_id.fc4_feature = BIT_1;
5168 }
5169 }
5170
5171 /*
5172 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5173 * @ha: HA context
5174 *
5175 * Beginning of ATIO ring has initialization control block already built
5176 * by nvram config routine.
5177 *
5178 * Returns 0 on success.
5179 */
5180 void
5181 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5182 {
5183 struct qla_hw_data *ha = vha->hw;
5184 uint16_t cnt;
5185 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5186
5187 if (!qla_tgt_mode_enabled(vha))
5188 return;
5189
5190 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5191 pkt->u.raw.signature = ATIO_PROCESSED;
5192 pkt++;
5193 }
5194
5195 }
5196
5197 /*
5198 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5199 * @ha: SCSI driver HA context
5200 */
5201 void
5202 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5203 {
5204 struct qla_hw_data *ha = vha->hw;
5205 struct atio_from_isp *pkt;
5206 int cnt, i;
5207
5208 if (!vha->flags.online)
5209 return;
5210
5211 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5212 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5213 cnt = pkt->u.raw.entry_count;
5214
5215 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5216
5217 for (i = 0; i < cnt; i++) {
5218 ha->tgt.atio_ring_index++;
5219 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5220 ha->tgt.atio_ring_index = 0;
5221 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5222 } else
5223 ha->tgt.atio_ring_ptr++;
5224
5225 pkt->u.raw.signature = ATIO_PROCESSED;
5226 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5227 }
5228 wmb();
5229 }
5230
5231 /* Adjust ring index */
5232 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5233 }
5234
5235 void
5236 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5237 {
5238 struct qla_hw_data *ha = vha->hw;
5239 if (!QLA_TGT_MODE_ENABLED())
5240 return;
5241
5242 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5243 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5244 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5245
5246 if (IS_ATIO_MSIX_CAPABLE(ha)) {
5247 struct qla_msix_entry *msix = &ha->msix_entries[2];
5248 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5249
5250 icb->msix_atio = cpu_to_le16(msix->entry);
5251 ql_dbg(ql_dbg_init, vha, 0xf072,
5252 "Registering ICB vector 0x%x for atio que.\n",
5253 msix->entry);
5254 }
5255 }
5256
5257 void
5258 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5259 {
5260 struct qla_hw_data *ha = vha->hw;
5261
5262 if (qla_tgt_mode_enabled(vha)) {
5263 if (!ha->tgt.saved_set) {
5264 /* We save only once */
5265 ha->tgt.saved_exchange_count = nv->exchange_count;
5266 ha->tgt.saved_firmware_options_1 =
5267 nv->firmware_options_1;
5268 ha->tgt.saved_firmware_options_2 =
5269 nv->firmware_options_2;
5270 ha->tgt.saved_firmware_options_3 =
5271 nv->firmware_options_3;
5272 ha->tgt.saved_set = 1;
5273 }
5274
5275 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5276
5277 /* Enable target mode */
5278 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5279
5280 /* Disable ini mode, if requested */
5281 if (!qla_ini_mode_enabled(vha))
5282 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5283
5284 /* Disable Full Login after LIP */
5285 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5286 /* Enable initial LIP */
5287 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5288 /* Enable FC tapes support */
5289 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
5290 /* Disable Full Login after LIP */
5291 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5292 /* Enable target PRLI control */
5293 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5294 } else {
5295 if (ha->tgt.saved_set) {
5296 nv->exchange_count = ha->tgt.saved_exchange_count;
5297 nv->firmware_options_1 =
5298 ha->tgt.saved_firmware_options_1;
5299 nv->firmware_options_2 =
5300 ha->tgt.saved_firmware_options_2;
5301 nv->firmware_options_3 =
5302 ha->tgt.saved_firmware_options_3;
5303 }
5304 return;
5305 }
5306
5307 /* out-of-order frames reassembly */
5308 nv->firmware_options_3 |= BIT_6|BIT_9;
5309
5310 if (ha->tgt.enable_class_2) {
5311 if (vha->flags.init_done)
5312 fc_host_supported_classes(vha->host) =
5313 FC_COS_CLASS2 | FC_COS_CLASS3;
5314
5315 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5316 } else {
5317 if (vha->flags.init_done)
5318 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5319
5320 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5321 }
5322 }
5323
5324 void
5325 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5326 struct init_cb_24xx *icb)
5327 {
5328 struct qla_hw_data *ha = vha->hw;
5329
5330 if (ha->tgt.node_name_set) {
5331 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5332 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5333 }
5334 }
5335
5336 void
5337 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5338 {
5339 struct qla_hw_data *ha = vha->hw;
5340
5341 if (!QLA_TGT_MODE_ENABLED())
5342 return;
5343
5344 if (qla_tgt_mode_enabled(vha)) {
5345 if (!ha->tgt.saved_set) {
5346 /* We save only once */
5347 ha->tgt.saved_exchange_count = nv->exchange_count;
5348 ha->tgt.saved_firmware_options_1 =
5349 nv->firmware_options_1;
5350 ha->tgt.saved_firmware_options_2 =
5351 nv->firmware_options_2;
5352 ha->tgt.saved_firmware_options_3 =
5353 nv->firmware_options_3;
5354 ha->tgt.saved_set = 1;
5355 }
5356
5357 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5358
5359 /* Enable target mode */
5360 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5361
5362 /* Disable ini mode, if requested */
5363 if (!qla_ini_mode_enabled(vha))
5364 nv->firmware_options_1 |=
5365 __constant_cpu_to_le32(BIT_5);
5366
5367 /* Disable Full Login after LIP */
5368 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5369 /* Enable initial LIP */
5370 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5371 /* Enable FC tapes support */
5372 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
5373 /* Disable Full Login after LIP */
5374 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5375 /* Enable target PRLI control */
5376 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5377 } else {
5378 if (ha->tgt.saved_set) {
5379 nv->exchange_count = ha->tgt.saved_exchange_count;
5380 nv->firmware_options_1 =
5381 ha->tgt.saved_firmware_options_1;
5382 nv->firmware_options_2 =
5383 ha->tgt.saved_firmware_options_2;
5384 nv->firmware_options_3 =
5385 ha->tgt.saved_firmware_options_3;
5386 }
5387 return;
5388 }
5389
5390 /* out-of-order frames reassembly */
5391 nv->firmware_options_3 |= BIT_6|BIT_9;
5392
5393 if (ha->tgt.enable_class_2) {
5394 if (vha->flags.init_done)
5395 fc_host_supported_classes(vha->host) =
5396 FC_COS_CLASS2 | FC_COS_CLASS3;
5397
5398 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5399 } else {
5400 if (vha->flags.init_done)
5401 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5402
5403 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5404 }
5405 }
5406
5407 void
5408 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5409 struct init_cb_81xx *icb)
5410 {
5411 struct qla_hw_data *ha = vha->hw;
5412
5413 if (!QLA_TGT_MODE_ENABLED())
5414 return;
5415
5416 if (ha->tgt.node_name_set) {
5417 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5418 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5419 }
5420 }
5421
5422 void
5423 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5424 {
5425 if (!QLA_TGT_MODE_ENABLED())
5426 return;
5427
5428 ha->msix_count += 1; /* For ATIO Q */
5429 }
5430
5431 int
5432 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5433 struct sts_entry_24xx *pkt)
5434 {
5435 switch (pkt->entry_type) {
5436 case ABTS_RECV_24XX:
5437 case ABTS_RESP_24XX:
5438 case CTIO_TYPE7:
5439 case NOTIFY_ACK_TYPE:
5440 case CTIO_CRC2:
5441 return 1;
5442 default:
5443 return 0;
5444 }
5445 }
5446
5447 void
5448 qlt_modify_vp_config(struct scsi_qla_host *vha,
5449 struct vp_config_entry_24xx *vpmod)
5450 {
5451 if (qla_tgt_mode_enabled(vha))
5452 vpmod->options_idx1 &= ~BIT_5;
5453 /* Disable ini mode, if requested */
5454 if (!qla_ini_mode_enabled(vha))
5455 vpmod->options_idx1 &= ~BIT_4;
5456 }
5457
5458 void
5459 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5460 {
5461 if (!QLA_TGT_MODE_ENABLED())
5462 return;
5463
5464 if (ha->mqenable || IS_QLA83XX(ha)) {
5465 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5466 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5467 } else {
5468 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5469 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5470 }
5471
5472 mutex_init(&base_vha->vha_tgt.tgt_mutex);
5473 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5474 qlt_clear_mode(base_vha);
5475 }
5476
5477 irqreturn_t
5478 qla83xx_msix_atio_q(int irq, void *dev_id)
5479 {
5480 struct rsp_que *rsp;
5481 scsi_qla_host_t *vha;
5482 struct qla_hw_data *ha;
5483 unsigned long flags;
5484
5485 rsp = (struct rsp_que *) dev_id;
5486 ha = rsp->hw;
5487 vha = pci_get_drvdata(ha->pdev);
5488
5489 spin_lock_irqsave(&ha->hardware_lock, flags);
5490
5491 qlt_24xx_process_atio_queue(vha);
5492 qla24xx_process_response_queue(vha, rsp);
5493
5494 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5495
5496 return IRQ_HANDLED;
5497 }
5498
5499 int
5500 qlt_mem_alloc(struct qla_hw_data *ha)
5501 {
5502 if (!QLA_TGT_MODE_ENABLED())
5503 return 0;
5504
5505 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5506 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5507 if (!ha->tgt.tgt_vp_map)
5508 return -ENOMEM;
5509
5510 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5511 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5512 &ha->tgt.atio_dma, GFP_KERNEL);
5513 if (!ha->tgt.atio_ring) {
5514 kfree(ha->tgt.tgt_vp_map);
5515 return -ENOMEM;
5516 }
5517 return 0;
5518 }
5519
5520 void
5521 qlt_mem_free(struct qla_hw_data *ha)
5522 {
5523 if (!QLA_TGT_MODE_ENABLED())
5524 return;
5525
5526 if (ha->tgt.atio_ring) {
5527 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5528 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5529 ha->tgt.atio_dma);
5530 }
5531 kfree(ha->tgt.tgt_vp_map);
5532 }
5533
5534 /* vport_slock to be held by the caller */
5535 void
5536 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5537 {
5538 if (!QLA_TGT_MODE_ENABLED())
5539 return;
5540
5541 switch (cmd) {
5542 case SET_VP_IDX:
5543 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5544 break;
5545 case SET_AL_PA:
5546 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5547 break;
5548 case RESET_VP_IDX:
5549 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5550 break;
5551 case RESET_AL_PA:
5552 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5553 break;
5554 }
5555 }
5556
5557 static int __init qlt_parse_ini_mode(void)
5558 {
5559 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5560 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5561 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5562 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5563 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5564 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5565 else
5566 return false;
5567
5568 return true;
5569 }
5570
5571 int __init qlt_init(void)
5572 {
5573 int ret;
5574
5575 if (!qlt_parse_ini_mode()) {
5576 ql_log(ql_log_fatal, NULL, 0xe06b,
5577 "qlt_parse_ini_mode() failed\n");
5578 return -EINVAL;
5579 }
5580
5581 if (!QLA_TGT_MODE_ENABLED())
5582 return 0;
5583
5584 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5585 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5586 qla_tgt_mgmt_cmd), 0, NULL);
5587 if (!qla_tgt_mgmt_cmd_cachep) {
5588 ql_log(ql_log_fatal, NULL, 0xe06d,
5589 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5590 return -ENOMEM;
5591 }
5592
5593 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5594 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5595 if (!qla_tgt_mgmt_cmd_mempool) {
5596 ql_log(ql_log_fatal, NULL, 0xe06e,
5597 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5598 ret = -ENOMEM;
5599 goto out_mgmt_cmd_cachep;
5600 }
5601
5602 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5603 if (!qla_tgt_wq) {
5604 ql_log(ql_log_fatal, NULL, 0xe06f,
5605 "alloc_workqueue for qla_tgt_wq failed\n");
5606 ret = -ENOMEM;
5607 goto out_cmd_mempool;
5608 }
5609 /*
5610 * Return 1 to signal that initiator-mode is being disabled
5611 */
5612 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5613
5614 out_cmd_mempool:
5615 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5616 out_mgmt_cmd_cachep:
5617 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5618 return ret;
5619 }
5620
5621 void qlt_exit(void)
5622 {
5623 if (!QLA_TGT_MODE_ENABLED())
5624 return;
5625
5626 destroy_workqueue(qla_tgt_wq);
5627 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5628 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5629 }
Linux kernel - Deliverables
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