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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / scsi / qla2xxx / qla_target.c
blob2eb97d7e8d122e21f7d3128270846754b4561313
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_cmd_cachep;
108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
109 static mempool_t *qla_tgt_mgmt_cmd_mempool;
110 static struct workqueue_struct *qla_tgt_wq;
111 static DEFINE_MUTEX(qla_tgt_mutex);
112 static LIST_HEAD(qla_tgt_glist);
113
114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
115 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
116 struct qla_tgt *tgt,
117 const uint8_t *port_name)
118 {
119 struct qla_tgt_sess *sess;
120
121 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
122 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
123 return sess;
124 }
125
126 return NULL;
127 }
128
129 /* Might release hw lock, then reaquire!! */
130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
131 {
132 /* Send marker if required */
133 if (unlikely(vha->marker_needed != 0)) {
134 int rc = qla2x00_issue_marker(vha, vha_locked);
135 if (rc != QLA_SUCCESS) {
136 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
137 "qla_target(%d): issue_marker() failed\n",
138 vha->vp_idx);
139 }
140 return rc;
141 }
142 return QLA_SUCCESS;
143 }
144
145 static inline
146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
147 uint8_t *d_id)
148 {
149 struct qla_hw_data *ha = vha->hw;
150 uint8_t vp_idx;
151
152 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
153 return NULL;
154
155 if (vha->d_id.b.al_pa == d_id[2])
156 return vha;
157
158 BUG_ON(ha->tgt.tgt_vp_map == NULL);
159 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
160 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
161 return ha->tgt.tgt_vp_map[vp_idx].vha;
162
163 return NULL;
164 }
165
166 static inline
167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
168 uint16_t vp_idx)
169 {
170 struct qla_hw_data *ha = vha->hw;
171
172 if (vha->vp_idx == vp_idx)
173 return vha;
174
175 BUG_ON(ha->tgt.tgt_vp_map == NULL);
176 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
177 return ha->tgt.tgt_vp_map[vp_idx].vha;
178
179 return NULL;
180 }
181
182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
183 struct atio_from_isp *atio)
184 {
185 switch (atio->u.raw.entry_type) {
186 case ATIO_TYPE7:
187 {
188 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
189 atio->u.isp24.fcp_hdr.d_id);
190 if (unlikely(NULL == host)) {
191 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
192 "qla_target(%d): Received ATIO_TYPE7 "
193 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
194 atio->u.isp24.fcp_hdr.d_id[0],
195 atio->u.isp24.fcp_hdr.d_id[1],
196 atio->u.isp24.fcp_hdr.d_id[2]);
197 break;
198 }
199 qlt_24xx_atio_pkt(host, atio);
200 break;
201 }
202
203 case IMMED_NOTIFY_TYPE:
204 {
205 struct scsi_qla_host *host = vha;
206 struct imm_ntfy_from_isp *entry =
207 (struct imm_ntfy_from_isp *)atio;
208
209 if ((entry->u.isp24.vp_index != 0xFF) &&
210 (entry->u.isp24.nport_handle != 0xFFFF)) {
211 host = qlt_find_host_by_vp_idx(vha,
212 entry->u.isp24.vp_index);
213 if (unlikely(!host)) {
214 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
215 "qla_target(%d): Received "
216 "ATIO (IMMED_NOTIFY_TYPE) "
217 "with unknown vp_index %d\n",
218 vha->vp_idx, entry->u.isp24.vp_index);
219 break;
220 }
221 }
222 qlt_24xx_atio_pkt(host, atio);
223 break;
224 }
225
226 default:
227 ql_dbg(ql_dbg_tgt, vha, 0xe040,
228 "qla_target(%d): Received unknown ATIO atio "
229 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
230 break;
231 }
232
233 return;
234 }
235
236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
237 {
238 switch (pkt->entry_type) {
239 case CTIO_TYPE7:
240 {
241 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
242 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
243 entry->vp_index);
244 if (unlikely(!host)) {
245 ql_dbg(ql_dbg_tgt, vha, 0xe041,
246 "qla_target(%d): Response pkt (CTIO_TYPE7) "
247 "received, with unknown vp_index %d\n",
248 vha->vp_idx, entry->vp_index);
249 break;
250 }
251 qlt_response_pkt(host, pkt);
252 break;
253 }
254
255 case IMMED_NOTIFY_TYPE:
256 {
257 struct scsi_qla_host *host = vha;
258 struct imm_ntfy_from_isp *entry =
259 (struct imm_ntfy_from_isp *)pkt;
260
261 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
262 if (unlikely(!host)) {
263 ql_dbg(ql_dbg_tgt, vha, 0xe042,
264 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
265 "received, with unknown vp_index %d\n",
266 vha->vp_idx, entry->u.isp24.vp_index);
267 break;
268 }
269 qlt_response_pkt(host, pkt);
270 break;
271 }
272
273 case NOTIFY_ACK_TYPE:
274 {
275 struct scsi_qla_host *host = vha;
276 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
277
278 if (0xFF != entry->u.isp24.vp_index) {
279 host = qlt_find_host_by_vp_idx(vha,
280 entry->u.isp24.vp_index);
281 if (unlikely(!host)) {
282 ql_dbg(ql_dbg_tgt, vha, 0xe043,
283 "qla_target(%d): Response "
284 "pkt (NOTIFY_ACK_TYPE) "
285 "received, with unknown "
286 "vp_index %d\n", vha->vp_idx,
287 entry->u.isp24.vp_index);
288 break;
289 }
290 }
291 qlt_response_pkt(host, pkt);
292 break;
293 }
294
295 case ABTS_RECV_24XX:
296 {
297 struct abts_recv_from_24xx *entry =
298 (struct abts_recv_from_24xx *)pkt;
299 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
300 entry->vp_index);
301 if (unlikely(!host)) {
302 ql_dbg(ql_dbg_tgt, vha, 0xe044,
303 "qla_target(%d): Response pkt "
304 "(ABTS_RECV_24XX) received, with unknown "
305 "vp_index %d\n", vha->vp_idx, entry->vp_index);
306 break;
307 }
308 qlt_response_pkt(host, pkt);
309 break;
310 }
311
312 case ABTS_RESP_24XX:
313 {
314 struct abts_resp_to_24xx *entry =
315 (struct abts_resp_to_24xx *)pkt;
316 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
317 entry->vp_index);
318 if (unlikely(!host)) {
319 ql_dbg(ql_dbg_tgt, vha, 0xe045,
320 "qla_target(%d): Response pkt "
321 "(ABTS_RECV_24XX) received, with unknown "
322 "vp_index %d\n", vha->vp_idx, entry->vp_index);
323 break;
324 }
325 qlt_response_pkt(host, pkt);
326 break;
327 }
328
329 default:
330 qlt_response_pkt(vha, pkt);
331 break;
332 }
333
334 }
335
336 static void qlt_free_session_done(struct work_struct *work)
337 {
338 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
339 free_work);
340 struct qla_tgt *tgt = sess->tgt;
341 struct scsi_qla_host *vha = sess->vha;
342 struct qla_hw_data *ha = vha->hw;
343
344 BUG_ON(!tgt);
345 /*
346 * Release the target session for FC Nexus from fabric module code.
347 */
348 if (sess->se_sess != NULL)
349 ha->tgt.tgt_ops->free_session(sess);
350
351 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
352 "Unregistration of sess %p finished\n", sess);
353
354 kfree(sess);
355 /*
356 * We need to protect against race, when tgt is freed before or
357 * inside wake_up()
358 */
359 tgt->sess_count--;
360 if (tgt->sess_count == 0)
361 wake_up_all(&tgt->waitQ);
362 }
363
364 /* ha->hardware_lock supposed to be held on entry */
365 void qlt_unreg_sess(struct qla_tgt_sess *sess)
366 {
367 struct scsi_qla_host *vha = sess->vha;
368
369 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
370
371 list_del(&sess->sess_list_entry);
372 if (sess->deleted)
373 list_del(&sess->del_list_entry);
374
375 INIT_WORK(&sess->free_work, qlt_free_session_done);
376 schedule_work(&sess->free_work);
377 }
378 EXPORT_SYMBOL(qlt_unreg_sess);
379
380 /* ha->hardware_lock supposed to be held on entry */
381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
382 {
383 struct qla_hw_data *ha = vha->hw;
384 struct qla_tgt_sess *sess = NULL;
385 uint32_t unpacked_lun, lun = 0;
386 uint16_t loop_id;
387 int res = 0;
388 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
389 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
390
391 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
392 if (loop_id == 0xFFFF) {
393 #if 0 /* FIXME: Re-enable Global event handling.. */
394 /* Global event */
395 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
396 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
397 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
398 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
399 typeof(*sess), sess_list_entry);
400 switch (mcmd) {
401 case QLA_TGT_NEXUS_LOSS_SESS:
402 mcmd = QLA_TGT_NEXUS_LOSS;
403 break;
404 case QLA_TGT_ABORT_ALL_SESS:
405 mcmd = QLA_TGT_ABORT_ALL;
406 break;
407 case QLA_TGT_NEXUS_LOSS:
408 case QLA_TGT_ABORT_ALL:
409 break;
410 default:
411 ql_dbg(ql_dbg_tgt, vha, 0xe046,
412 "qla_target(%d): Not allowed "
413 "command %x in %s", vha->vp_idx,
414 mcmd, __func__);
415 sess = NULL;
416 break;
417 }
418 } else
419 sess = NULL;
420 #endif
421 } else {
422 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
423 }
424
425 ql_dbg(ql_dbg_tgt, vha, 0xe000,
426 "Using sess for qla_tgt_reset: %p\n", sess);
427 if (!sess) {
428 res = -ESRCH;
429 return res;
430 }
431
432 ql_dbg(ql_dbg_tgt, vha, 0xe047,
433 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
434 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
435 mcmd, loop_id);
436
437 lun = a->u.isp24.fcp_cmnd.lun;
438 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
439
440 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
441 iocb, QLA24XX_MGMT_SEND_NACK);
442 }
443
444 /* ha->hardware_lock supposed to be held on entry */
445 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
446 bool immediate)
447 {
448 struct qla_tgt *tgt = sess->tgt;
449 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
450
451 if (sess->deleted)
452 return;
453
454 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
455 "Scheduling sess %p for deletion\n", sess);
456 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
457 sess->deleted = 1;
458
459 if (immediate)
460 dev_loss_tmo = 0;
461
462 sess->expires = jiffies + dev_loss_tmo * HZ;
463
464 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
465 "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
466 "deletion in %u secs (expires: %lu) immed: %d\n",
467 sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
468 sess->expires, immediate);
469
470 if (immediate)
471 schedule_delayed_work(&tgt->sess_del_work, 0);
472 else
473 schedule_delayed_work(&tgt->sess_del_work,
474 sess->expires - jiffies);
475 }
476
477 /* ha->hardware_lock supposed to be held on entry */
478 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
479 {
480 struct qla_tgt_sess *sess;
481
482 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
483 qlt_schedule_sess_for_deletion(sess, true);
484
485 /* At this point tgt could be already dead */
486 }
487
488 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
489 uint16_t *loop_id)
490 {
491 struct qla_hw_data *ha = vha->hw;
492 dma_addr_t gid_list_dma;
493 struct gid_list_info *gid_list;
494 char *id_iter;
495 int res, rc, i;
496 uint16_t entries;
497
498 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
499 &gid_list_dma, GFP_KERNEL);
500 if (!gid_list) {
501 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
502 "qla_target(%d): DMA Alloc failed of %u\n",
503 vha->vp_idx, qla2x00_gid_list_size(ha));
504 return -ENOMEM;
505 }
506
507 /* Get list of logged in devices */
508 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
509 if (rc != QLA_SUCCESS) {
510 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
511 "qla_target(%d): get_id_list() failed: %x\n",
512 vha->vp_idx, rc);
513 res = -1;
514 goto out_free_id_list;
515 }
516
517 id_iter = (char *)gid_list;
518 res = -1;
519 for (i = 0; i < entries; i++) {
520 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
521 if ((gid->al_pa == s_id[2]) &&
522 (gid->area == s_id[1]) &&
523 (gid->domain == s_id[0])) {
524 *loop_id = le16_to_cpu(gid->loop_id);
525 res = 0;
526 break;
527 }
528 id_iter += ha->gid_list_info_size;
529 }
530
531 out_free_id_list:
532 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
533 gid_list, gid_list_dma);
534 return res;
535 }
536
537 /* ha->hardware_lock supposed to be held on entry */
538 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
539 {
540 BUG_ON(!sess->deleted);
541
542 list_del(&sess->del_list_entry);
543 sess->deleted = 0;
544 }
545
546 static void qlt_del_sess_work_fn(struct delayed_work *work)
547 {
548 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
549 sess_del_work);
550 struct scsi_qla_host *vha = tgt->vha;
551 struct qla_hw_data *ha = vha->hw;
552 struct qla_tgt_sess *sess;
553 unsigned long flags, elapsed;
554
555 spin_lock_irqsave(&ha->hardware_lock, flags);
556 while (!list_empty(&tgt->del_sess_list)) {
557 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
558 del_list_entry);
559 elapsed = jiffies;
560 if (time_after_eq(elapsed, sess->expires)) {
561 qlt_undelete_sess(sess);
562
563 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
564 "Timeout: sess %p about to be deleted\n",
565 sess);
566 ha->tgt.tgt_ops->shutdown_sess(sess);
567 ha->tgt.tgt_ops->put_sess(sess);
568 } else {
569 schedule_delayed_work(&tgt->sess_del_work,
570 sess->expires - elapsed);
571 break;
572 }
573 }
574 spin_unlock_irqrestore(&ha->hardware_lock, flags);
575 }
576
577 /*
578 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
579 * Caller must put it.
580 */
581 static struct qla_tgt_sess *qlt_create_sess(
582 struct scsi_qla_host *vha,
583 fc_port_t *fcport,
584 bool local)
585 {
586 struct qla_hw_data *ha = vha->hw;
587 struct qla_tgt_sess *sess;
588 unsigned long flags;
589 unsigned char be_sid[3];
590
591 /* Check to avoid double sessions */
592 spin_lock_irqsave(&ha->hardware_lock, flags);
593 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
594 sess_list_entry) {
595 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
596 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
597 "Double sess %p found (s_id %x:%x:%x, "
598 "loop_id %d), updating to d_id %x:%x:%x, "
599 "loop_id %d", sess, sess->s_id.b.domain,
600 sess->s_id.b.al_pa, sess->s_id.b.area,
601 sess->loop_id, fcport->d_id.b.domain,
602 fcport->d_id.b.al_pa, fcport->d_id.b.area,
603 fcport->loop_id);
604
605 if (sess->deleted)
606 qlt_undelete_sess(sess);
607
608 kref_get(&sess->se_sess->sess_kref);
609 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
610 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
611
612 if (sess->local && !local)
613 sess->local = 0;
614 spin_unlock_irqrestore(&ha->hardware_lock, flags);
615
616 return sess;
617 }
618 }
619 spin_unlock_irqrestore(&ha->hardware_lock, flags);
620
621 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
622 if (!sess) {
623 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
624 "qla_target(%u): session allocation failed, all commands "
625 "from port %8phC will be refused", vha->vp_idx,
626 fcport->port_name);
627
628 return NULL;
629 }
630 sess->tgt = vha->vha_tgt.qla_tgt;
631 sess->vha = vha;
632 sess->s_id = fcport->d_id;
633 sess->loop_id = fcport->loop_id;
634 sess->local = local;
635
636 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
637 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
638 sess, vha->vha_tgt.qla_tgt);
639
640 be_sid[0] = sess->s_id.b.domain;
641 be_sid[1] = sess->s_id.b.area;
642 be_sid[2] = sess->s_id.b.al_pa;
643 /*
644 * Determine if this fc_port->port_name is allowed to access
645 * target mode using explict NodeACLs+MappedLUNs, or using
646 * TPG demo mode. If this is successful a target mode FC nexus
647 * is created.
648 */
649 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
650 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
651 kfree(sess);
652 return NULL;
653 }
654 /*
655 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
656 * access across ->hardware_lock reaquire.
657 */
658 kref_get(&sess->se_sess->sess_kref);
659
660 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
661 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
662 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
663
664 spin_lock_irqsave(&ha->hardware_lock, flags);
665 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
666 vha->vha_tgt.qla_tgt->sess_count++;
667 spin_unlock_irqrestore(&ha->hardware_lock, flags);
668
669 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
670 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
671 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
672 vha->vp_idx, local ? "local " : "", fcport->port_name,
673 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
674 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
675
676 return sess;
677 }
678
679 /*
680 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
681 */
682 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
683 {
684 struct qla_hw_data *ha = vha->hw;
685 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
686 struct qla_tgt_sess *sess;
687 unsigned long flags;
688
689 if (!vha->hw->tgt.tgt_ops)
690 return;
691
692 if (!tgt || (fcport->port_type != FCT_INITIATOR))
693 return;
694
695 if (qla_ini_mode_enabled(vha))
696 return;
697
698 spin_lock_irqsave(&ha->hardware_lock, flags);
699 if (tgt->tgt_stop) {
700 spin_unlock_irqrestore(&ha->hardware_lock, flags);
701 return;
702 }
703 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
704 if (!sess) {
705 spin_unlock_irqrestore(&ha->hardware_lock, flags);
706
707 mutex_lock(&vha->vha_tgt.tgt_mutex);
708 sess = qlt_create_sess(vha, fcport, false);
709 mutex_unlock(&vha->vha_tgt.tgt_mutex);
710
711 spin_lock_irqsave(&ha->hardware_lock, flags);
712 } else {
713 kref_get(&sess->se_sess->sess_kref);
714
715 if (sess->deleted) {
716 qlt_undelete_sess(sess);
717
718 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
719 "qla_target(%u): %ssession for port %8phC "
720 "(loop ID %d) reappeared\n", vha->vp_idx,
721 sess->local ? "local " : "", sess->port_name,
722 sess->loop_id);
723
724 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
725 "Reappeared sess %p\n", sess);
726 }
727 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
728 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
729 }
730
731 if (sess && sess->local) {
732 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
733 "qla_target(%u): local session for "
734 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
735 fcport->port_name, sess->loop_id);
736 sess->local = 0;
737 }
738 ha->tgt.tgt_ops->put_sess(sess);
739 spin_unlock_irqrestore(&ha->hardware_lock, flags);
740 }
741
742 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
743 {
744 struct qla_hw_data *ha = vha->hw;
745 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
746 struct qla_tgt_sess *sess;
747 unsigned long flags;
748
749 if (!vha->hw->tgt.tgt_ops)
750 return;
751
752 if (!tgt || (fcport->port_type != FCT_INITIATOR))
753 return;
754
755 spin_lock_irqsave(&ha->hardware_lock, flags);
756 if (tgt->tgt_stop) {
757 spin_unlock_irqrestore(&ha->hardware_lock, flags);
758 return;
759 }
760 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
761 if (!sess) {
762 spin_unlock_irqrestore(&ha->hardware_lock, flags);
763 return;
764 }
765
766 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
767
768 sess->local = 1;
769 qlt_schedule_sess_for_deletion(sess, false);
770 spin_unlock_irqrestore(&ha->hardware_lock, flags);
771 }
772
773 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
774 {
775 struct qla_hw_data *ha = tgt->ha;
776 unsigned long flags;
777 int res;
778 /*
779 * We need to protect against race, when tgt is freed before or
780 * inside wake_up()
781 */
782 spin_lock_irqsave(&ha->hardware_lock, flags);
783 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
784 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
785 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
786 res = (tgt->sess_count == 0);
787 spin_unlock_irqrestore(&ha->hardware_lock, flags);
788
789 return res;
790 }
791
792 /* Called by tcm_qla2xxx configfs code */
793 void qlt_stop_phase1(struct qla_tgt *tgt)
794 {
795 struct scsi_qla_host *vha = tgt->vha;
796 struct qla_hw_data *ha = tgt->ha;
797 unsigned long flags;
798
799 if (tgt->tgt_stop || tgt->tgt_stopped) {
800 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
801 "Already in tgt->tgt_stop or tgt_stopped state\n");
802 dump_stack();
803 return;
804 }
805
806 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
807 vha->host_no, vha);
808 /*
809 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
810 * Lock is needed, because we still can get an incoming packet.
811 */
812 mutex_lock(&vha->vha_tgt.tgt_mutex);
813 spin_lock_irqsave(&ha->hardware_lock, flags);
814 tgt->tgt_stop = 1;
815 qlt_clear_tgt_db(tgt, true);
816 spin_unlock_irqrestore(&ha->hardware_lock, flags);
817 mutex_unlock(&vha->vha_tgt.tgt_mutex);
818
819 flush_delayed_work(&tgt->sess_del_work);
820
821 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
822 "Waiting for sess works (tgt %p)", tgt);
823 spin_lock_irqsave(&tgt->sess_work_lock, flags);
824 while (!list_empty(&tgt->sess_works_list)) {
825 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
826 flush_scheduled_work();
827 spin_lock_irqsave(&tgt->sess_work_lock, flags);
828 }
829 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
830
831 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
832 "Waiting for tgt %p: list_empty(sess_list)=%d "
833 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
834 tgt->sess_count);
835
836 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
837
838 /* Big hammer */
839 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
840 qlt_disable_vha(vha);
841
842 /* Wait for sessions to clear out (just in case) */
843 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
844 }
845 EXPORT_SYMBOL(qlt_stop_phase1);
846
847 /* Called by tcm_qla2xxx configfs code */
848 void qlt_stop_phase2(struct qla_tgt *tgt)
849 {
850 struct qla_hw_data *ha = tgt->ha;
851 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
852 unsigned long flags;
853
854 if (tgt->tgt_stopped) {
855 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
856 "Already in tgt->tgt_stopped state\n");
857 dump_stack();
858 return;
859 }
860
861 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
862 "Waiting for %d IRQ commands to complete (tgt %p)",
863 tgt->irq_cmd_count, tgt);
864
865 mutex_lock(&vha->vha_tgt.tgt_mutex);
866 spin_lock_irqsave(&ha->hardware_lock, flags);
867 while (tgt->irq_cmd_count != 0) {
868 spin_unlock_irqrestore(&ha->hardware_lock, flags);
869 udelay(2);
870 spin_lock_irqsave(&ha->hardware_lock, flags);
871 }
872 tgt->tgt_stop = 0;
873 tgt->tgt_stopped = 1;
874 spin_unlock_irqrestore(&ha->hardware_lock, flags);
875 mutex_unlock(&vha->vha_tgt.tgt_mutex);
876
877 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
878 tgt);
879 }
880 EXPORT_SYMBOL(qlt_stop_phase2);
881
882 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
883 static void qlt_release(struct qla_tgt *tgt)
884 {
885 scsi_qla_host_t *vha = tgt->vha;
886
887 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
888 qlt_stop_phase2(tgt);
889
890 vha->vha_tgt.qla_tgt = NULL;
891
892 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
893 "Release of tgt %p finished\n", tgt);
894
895 kfree(tgt);
896 }
897
898 /* ha->hardware_lock supposed to be held on entry */
899 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
900 const void *param, unsigned int param_size)
901 {
902 struct qla_tgt_sess_work_param *prm;
903 unsigned long flags;
904
905 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
906 if (!prm) {
907 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
908 "qla_target(%d): Unable to create session "
909 "work, command will be refused", 0);
910 return -ENOMEM;
911 }
912
913 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
914 "Scheduling work (type %d, prm %p)"
915 " to find session for param %p (size %d, tgt %p)\n",
916 type, prm, param, param_size, tgt);
917
918 prm->type = type;
919 memcpy(&prm->tm_iocb, param, param_size);
920
921 spin_lock_irqsave(&tgt->sess_work_lock, flags);
922 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
923 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
924
925 schedule_work(&tgt->sess_work);
926
927 return 0;
928 }
929
930 /*
931 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
932 */
933 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
934 struct imm_ntfy_from_isp *ntfy,
935 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
936 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
937 {
938 struct qla_hw_data *ha = vha->hw;
939 request_t *pkt;
940 struct nack_to_isp *nack;
941
942 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
943
944 /* Send marker if required */
945 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
946 return;
947
948 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
949 if (!pkt) {
950 ql_dbg(ql_dbg_tgt, vha, 0xe049,
951 "qla_target(%d): %s failed: unable to allocate "
952 "request packet\n", vha->vp_idx, __func__);
953 return;
954 }
955
956 if (vha->vha_tgt.qla_tgt != NULL)
957 vha->vha_tgt.qla_tgt->notify_ack_expected++;
958
959 pkt->entry_type = NOTIFY_ACK_TYPE;
960 pkt->entry_count = 1;
961
962 nack = (struct nack_to_isp *)pkt;
963 nack->ox_id = ntfy->ox_id;
964
965 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
966 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
967 nack->u.isp24.flags = ntfy->u.isp24.flags &
968 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
969 }
970 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
971 nack->u.isp24.status = ntfy->u.isp24.status;
972 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
973 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
974 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
975 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
976 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
977 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
978 nack->u.isp24.srr_reject_code = srr_reject_code;
979 nack->u.isp24.srr_reject_code_expl = srr_explan;
980 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
981
982 ql_dbg(ql_dbg_tgt, vha, 0xe005,
983 "qla_target(%d): Sending 24xx Notify Ack %d\n",
984 vha->vp_idx, nack->u.isp24.status);
985
986 qla2x00_start_iocbs(vha, vha->req);
987 }
988
989 /*
990 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
991 */
992 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
993 struct abts_recv_from_24xx *abts, uint32_t status,
994 bool ids_reversed)
995 {
996 struct qla_hw_data *ha = vha->hw;
997 struct abts_resp_to_24xx *resp;
998 uint32_t f_ctl;
999 uint8_t *p;
1000
1001 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1002 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1003 ha, abts, status);
1004
1005 /* Send marker if required */
1006 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1007 return;
1008
1009 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1010 if (!resp) {
1011 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1012 "qla_target(%d): %s failed: unable to allocate "
1013 "request packet", vha->vp_idx, __func__);
1014 return;
1015 }
1016
1017 resp->entry_type = ABTS_RESP_24XX;
1018 resp->entry_count = 1;
1019 resp->nport_handle = abts->nport_handle;
1020 resp->vp_index = vha->vp_idx;
1021 resp->sof_type = abts->sof_type;
1022 resp->exchange_address = abts->exchange_address;
1023 resp->fcp_hdr_le = abts->fcp_hdr_le;
1024 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1025 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1026 F_CTL_SEQ_INITIATIVE);
1027 p = (uint8_t *)&f_ctl;
1028 resp->fcp_hdr_le.f_ctl[0] = *p++;
1029 resp->fcp_hdr_le.f_ctl[1] = *p++;
1030 resp->fcp_hdr_le.f_ctl[2] = *p;
1031 if (ids_reversed) {
1032 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1033 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1034 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1035 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1036 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1037 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1038 } else {
1039 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1040 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1041 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1042 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1043 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1044 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1045 }
1046 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1047 if (status == FCP_TMF_CMPL) {
1048 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1049 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1050 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1051 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1052 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1053 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1054 } else {
1055 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1056 resp->payload.ba_rjt.reason_code =
1057 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1058 /* Other bytes are zero */
1059 }
1060
1061 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1062
1063 qla2x00_start_iocbs(vha, vha->req);
1064 }
1065
1066 /*
1067 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1068 */
1069 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1070 struct abts_resp_from_24xx_fw *entry)
1071 {
1072 struct ctio7_to_24xx *ctio;
1073
1074 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1075 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1076 /* Send marker if required */
1077 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1078 return;
1079
1080 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1081 if (ctio == NULL) {
1082 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1083 "qla_target(%d): %s failed: unable to allocate "
1084 "request packet\n", vha->vp_idx, __func__);
1085 return;
1086 }
1087
1088 /*
1089 * We've got on entrance firmware's response on by us generated
1090 * ABTS response. So, in it ID fields are reversed.
1091 */
1092
1093 ctio->entry_type = CTIO_TYPE7;
1094 ctio->entry_count = 1;
1095 ctio->nport_handle = entry->nport_handle;
1096 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1097 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1098 ctio->vp_index = vha->vp_idx;
1099 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1100 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1101 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1102 ctio->exchange_addr = entry->exchange_addr_to_abort;
1103 ctio->u.status1.flags =
1104 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1105 CTIO7_FLAGS_TERMINATE);
1106 ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1107
1108 qla2x00_start_iocbs(vha, vha->req);
1109
1110 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1111 FCP_TMF_CMPL, true);
1112 }
1113
1114 /* ha->hardware_lock supposed to be held on entry */
1115 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1116 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1117 {
1118 struct qla_hw_data *ha = vha->hw;
1119 struct se_session *se_sess = sess->se_sess;
1120 struct qla_tgt_mgmt_cmd *mcmd;
1121 struct se_cmd *se_cmd;
1122 u32 lun = 0;
1123 int rc;
1124 bool found_lun = false;
1125
1126 spin_lock(&se_sess->sess_cmd_lock);
1127 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1128 struct qla_tgt_cmd *cmd =
1129 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1130 if (cmd->tag == abts->exchange_addr_to_abort) {
1131 lun = cmd->unpacked_lun;
1132 found_lun = true;
1133 break;
1134 }
1135 }
1136 spin_unlock(&se_sess->sess_cmd_lock);
1137
1138 if (!found_lun)
1139 return -ENOENT;
1140
1141 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1142 "qla_target(%d): task abort (tag=%d)\n",
1143 vha->vp_idx, abts->exchange_addr_to_abort);
1144
1145 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1146 if (mcmd == NULL) {
1147 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1148 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1149 vha->vp_idx, __func__);
1150 return -ENOMEM;
1151 }
1152 memset(mcmd, 0, sizeof(*mcmd));
1153
1154 mcmd->sess = sess;
1155 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1156
1157 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1158 abts->exchange_addr_to_abort);
1159 if (rc != 0) {
1160 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1161 "qla_target(%d): tgt_ops->handle_tmr()"
1162 " failed: %d", vha->vp_idx, rc);
1163 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1164 return -EFAULT;
1165 }
1166
1167 return 0;
1168 }
1169
1170 /*
1171 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1172 */
1173 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1174 struct abts_recv_from_24xx *abts)
1175 {
1176 struct qla_hw_data *ha = vha->hw;
1177 struct qla_tgt_sess *sess;
1178 uint32_t tag = abts->exchange_addr_to_abort;
1179 uint8_t s_id[3];
1180 int rc;
1181
1182 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1183 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1184 "qla_target(%d): ABTS: Abort Sequence not "
1185 "supported\n", vha->vp_idx);
1186 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1187 return;
1188 }
1189
1190 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1191 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1192 "qla_target(%d): ABTS: Unknown Exchange "
1193 "Address received\n", vha->vp_idx);
1194 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1195 return;
1196 }
1197
1198 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1199 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1200 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1201 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1202 le32_to_cpu(abts->fcp_hdr_le.parameter));
1203
1204 s_id[0] = abts->fcp_hdr_le.s_id[2];
1205 s_id[1] = abts->fcp_hdr_le.s_id[1];
1206 s_id[2] = abts->fcp_hdr_le.s_id[0];
1207
1208 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1209 if (!sess) {
1210 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1211 "qla_target(%d): task abort for non-existant session\n",
1212 vha->vp_idx);
1213 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1214 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1215 if (rc != 0) {
1216 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1217 false);
1218 }
1219 return;
1220 }
1221
1222 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1223 if (rc != 0) {
1224 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1225 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1226 vha->vp_idx, rc);
1227 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1228 return;
1229 }
1230 }
1231
1232 /*
1233 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1234 */
1235 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1236 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1237 {
1238 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1239 struct ctio7_to_24xx *ctio;
1240
1241 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1242 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1243 ha, atio, resp_code);
1244
1245 /* Send marker if required */
1246 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1247 return;
1248
1249 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1250 if (ctio == NULL) {
1251 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1252 "qla_target(%d): %s failed: unable to allocate "
1253 "request packet\n", ha->vp_idx, __func__);
1254 return;
1255 }
1256
1257 ctio->entry_type = CTIO_TYPE7;
1258 ctio->entry_count = 1;
1259 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1260 ctio->nport_handle = mcmd->sess->loop_id;
1261 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1262 ctio->vp_index = ha->vp_idx;
1263 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1264 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1265 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1266 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1267 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1268 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1269 CTIO7_FLAGS_SEND_STATUS);
1270 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1271 ctio->u.status1.scsi_status =
1272 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1273 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1274 ctio->u.status1.sense_data[0] = resp_code;
1275
1276 qla2x00_start_iocbs(ha, ha->req);
1277 }
1278
1279 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1280 {
1281 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1282 }
1283 EXPORT_SYMBOL(qlt_free_mcmd);
1284
1285 /* callback from target fabric module code */
1286 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1287 {
1288 struct scsi_qla_host *vha = mcmd->sess->vha;
1289 struct qla_hw_data *ha = vha->hw;
1290 unsigned long flags;
1291
1292 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1293 "TM response mcmd (%p) status %#x state %#x",
1294 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1295
1296 spin_lock_irqsave(&ha->hardware_lock, flags);
1297 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1298 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1299 0, 0, 0, 0, 0, 0);
1300 else {
1301 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1302 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1303 mcmd->fc_tm_rsp, false);
1304 else
1305 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1306 mcmd->fc_tm_rsp);
1307 }
1308 /*
1309 * Make the callback for ->free_mcmd() to queue_work() and invoke
1310 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1311 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1312 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1313 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1314 * qlt_xmit_tm_rsp() returns here..
1315 */
1316 ha->tgt.tgt_ops->free_mcmd(mcmd);
1317 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1318 }
1319 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1320
1321 /* No locks */
1322 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1323 {
1324 struct qla_tgt_cmd *cmd = prm->cmd;
1325
1326 BUG_ON(cmd->sg_cnt == 0);
1327
1328 prm->sg = (struct scatterlist *)cmd->sg;
1329 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1330 cmd->sg_cnt, cmd->dma_data_direction);
1331 if (unlikely(prm->seg_cnt == 0))
1332 goto out_err;
1333
1334 prm->cmd->sg_mapped = 1;
1335
1336 /*
1337 * If greater than four sg entries then we need to allocate
1338 * the continuation entries
1339 */
1340 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1341 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1342 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1343
1344 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1345 prm->seg_cnt, prm->req_cnt);
1346 return 0;
1347
1348 out_err:
1349 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1350 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1351 0, prm->cmd->sg_cnt);
1352 return -1;
1353 }
1354
1355 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1356 struct qla_tgt_cmd *cmd)
1357 {
1358 struct qla_hw_data *ha = vha->hw;
1359
1360 BUG_ON(!cmd->sg_mapped);
1361 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1362 cmd->sg_mapped = 0;
1363 }
1364
1365 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1366 uint32_t req_cnt)
1367 {
1368 struct qla_hw_data *ha = vha->hw;
1369 device_reg_t __iomem *reg = ha->iobase;
1370 uint32_t cnt;
1371
1372 if (vha->req->cnt < (req_cnt + 2)) {
1373 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1374
1375 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1376 "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1377 "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1378 vha->req->ring_index, vha->req->cnt, req_cnt);
1379 if (vha->req->ring_index < cnt)
1380 vha->req->cnt = cnt - vha->req->ring_index;
1381 else
1382 vha->req->cnt = vha->req->length -
1383 (vha->req->ring_index - cnt);
1384 }
1385
1386 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1387 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1388 "qla_target(%d): There is no room in the "
1389 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1390 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1391 vha->req->cnt, req_cnt);
1392 return -EAGAIN;
1393 }
1394 vha->req->cnt -= req_cnt;
1395
1396 return 0;
1397 }
1398
1399 /*
1400 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1401 */
1402 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1403 {
1404 /* Adjust ring index. */
1405 vha->req->ring_index++;
1406 if (vha->req->ring_index == vha->req->length) {
1407 vha->req->ring_index = 0;
1408 vha->req->ring_ptr = vha->req->ring;
1409 } else {
1410 vha->req->ring_ptr++;
1411 }
1412 return (cont_entry_t *)vha->req->ring_ptr;
1413 }
1414
1415 /* ha->hardware_lock supposed to be held on entry */
1416 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1417 {
1418 struct qla_hw_data *ha = vha->hw;
1419 uint32_t h;
1420
1421 h = ha->tgt.current_handle;
1422 /* always increment cmd handle */
1423 do {
1424 ++h;
1425 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1426 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1427 if (h == ha->tgt.current_handle) {
1428 ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1429 "qla_target(%d): Ran out of "
1430 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1431 h = QLA_TGT_NULL_HANDLE;
1432 break;
1433 }
1434 } while ((h == QLA_TGT_NULL_HANDLE) ||
1435 (h == QLA_TGT_SKIP_HANDLE) ||
1436 (ha->tgt.cmds[h-1] != NULL));
1437
1438 if (h != QLA_TGT_NULL_HANDLE)
1439 ha->tgt.current_handle = h;
1440
1441 return h;
1442 }
1443
1444 /* ha->hardware_lock supposed to be held on entry */
1445 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1446 struct scsi_qla_host *vha)
1447 {
1448 uint32_t h;
1449 struct ctio7_to_24xx *pkt;
1450 struct qla_hw_data *ha = vha->hw;
1451 struct atio_from_isp *atio = &prm->cmd->atio;
1452
1453 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1454 prm->pkt = pkt;
1455 memset(pkt, 0, sizeof(*pkt));
1456
1457 pkt->entry_type = CTIO_TYPE7;
1458 pkt->entry_count = (uint8_t)prm->req_cnt;
1459 pkt->vp_index = vha->vp_idx;
1460
1461 h = qlt_make_handle(vha);
1462 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1463 /*
1464 * CTIO type 7 from the firmware doesn't provide a way to
1465 * know the initiator's LOOP ID, hence we can't find
1466 * the session and, so, the command.
1467 */
1468 return -EAGAIN;
1469 } else
1470 ha->tgt.cmds[h-1] = prm->cmd;
1471
1472 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1473 pkt->nport_handle = prm->cmd->loop_id;
1474 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1475 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1476 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1477 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1478 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1479 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1480 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1481 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1482
1483 ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1484 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1485 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1486 le16_to_cpu(pkt->u.status0.ox_id));
1487 return 0;
1488 }
1489
1490 /*
1491 * ha->hardware_lock supposed to be held on entry. We have already made sure
1492 * that there is sufficient amount of request entries to not drop it.
1493 */
1494 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1495 struct scsi_qla_host *vha)
1496 {
1497 int cnt;
1498 uint32_t *dword_ptr;
1499 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1500
1501 /* Build continuation packets */
1502 while (prm->seg_cnt > 0) {
1503 cont_a64_entry_t *cont_pkt64 =
1504 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1505
1506 /*
1507 * Make sure that from cont_pkt64 none of
1508 * 64-bit specific fields used for 32-bit
1509 * addressing. Cast to (cont_entry_t *) for
1510 * that.
1511 */
1512
1513 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1514
1515 cont_pkt64->entry_count = 1;
1516 cont_pkt64->sys_define = 0;
1517
1518 if (enable_64bit_addressing) {
1519 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1520 dword_ptr =
1521 (uint32_t *)&cont_pkt64->dseg_0_address;
1522 } else {
1523 cont_pkt64->entry_type = CONTINUE_TYPE;
1524 dword_ptr =
1525 (uint32_t *)&((cont_entry_t *)
1526 cont_pkt64)->dseg_0_address;
1527 }
1528
1529 /* Load continuation entry data segments */
1530 for (cnt = 0;
1531 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1532 cnt++, prm->seg_cnt--) {
1533 *dword_ptr++ =
1534 cpu_to_le32(pci_dma_lo32
1535 (sg_dma_address(prm->sg)));
1536 if (enable_64bit_addressing) {
1537 *dword_ptr++ =
1538 cpu_to_le32(pci_dma_hi32
1539 (sg_dma_address
1540 (prm->sg)));
1541 }
1542 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1543
1544 ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1545 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1546 (long long unsigned int)
1547 pci_dma_hi32(sg_dma_address(prm->sg)),
1548 (long long unsigned int)
1549 pci_dma_lo32(sg_dma_address(prm->sg)),
1550 (int)sg_dma_len(prm->sg));
1551
1552 prm->sg = sg_next(prm->sg);
1553 }
1554 }
1555 }
1556
1557 /*
1558 * ha->hardware_lock supposed to be held on entry. We have already made sure
1559 * that there is sufficient amount of request entries to not drop it.
1560 */
1561 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1562 struct scsi_qla_host *vha)
1563 {
1564 int cnt;
1565 uint32_t *dword_ptr;
1566 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1567 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1568
1569 ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1570 "iocb->scsi_status=%x, iocb->flags=%x\n",
1571 le16_to_cpu(pkt24->u.status0.scsi_status),
1572 le16_to_cpu(pkt24->u.status0.flags));
1573
1574 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1575
1576 /* Setup packet address segment pointer */
1577 dword_ptr = pkt24->u.status0.dseg_0_address;
1578
1579 /* Set total data segment count */
1580 if (prm->seg_cnt)
1581 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1582
1583 if (prm->seg_cnt == 0) {
1584 /* No data transfer */
1585 *dword_ptr++ = 0;
1586 *dword_ptr = 0;
1587 return;
1588 }
1589
1590 /* If scatter gather */
1591 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1592
1593 /* Load command entry data segments */
1594 for (cnt = 0;
1595 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1596 cnt++, prm->seg_cnt--) {
1597 *dword_ptr++ =
1598 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1599 if (enable_64bit_addressing) {
1600 *dword_ptr++ =
1601 cpu_to_le32(pci_dma_hi32(
1602 sg_dma_address(prm->sg)));
1603 }
1604 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1605
1606 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1607 "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1608 (long long unsigned int)pci_dma_hi32(sg_dma_address(
1609 prm->sg)),
1610 (long long unsigned int)pci_dma_lo32(sg_dma_address(
1611 prm->sg)),
1612 (int)sg_dma_len(prm->sg));
1613
1614 prm->sg = sg_next(prm->sg);
1615 }
1616
1617 qlt_load_cont_data_segments(prm, vha);
1618 }
1619
1620 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1621 {
1622 return cmd->bufflen > 0;
1623 }
1624
1625 /*
1626 * Called without ha->hardware_lock held
1627 */
1628 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1629 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1630 uint32_t *full_req_cnt)
1631 {
1632 struct qla_tgt *tgt = cmd->tgt;
1633 struct scsi_qla_host *vha = tgt->vha;
1634 struct qla_hw_data *ha = vha->hw;
1635 struct se_cmd *se_cmd = &cmd->se_cmd;
1636
1637 if (unlikely(cmd->aborted)) {
1638 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1639 "qla_target(%d): terminating exchange "
1640 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1641 se_cmd, cmd->tag);
1642
1643 cmd->state = QLA_TGT_STATE_ABORTED;
1644
1645 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1646
1647 /* !! At this point cmd could be already freed !! */
1648 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1649 }
1650
1651 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1652 vha->vp_idx, cmd->tag);
1653
1654 prm->cmd = cmd;
1655 prm->tgt = tgt;
1656 prm->rq_result = scsi_status;
1657 prm->sense_buffer = &cmd->sense_buffer[0];
1658 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1659 prm->sg = NULL;
1660 prm->seg_cnt = -1;
1661 prm->req_cnt = 1;
1662 prm->add_status_pkt = 0;
1663
1664 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1665 prm->rq_result, xmit_type);
1666
1667 /* Send marker if required */
1668 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1669 return -EFAULT;
1670
1671 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1672
1673 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1674 if (qlt_pci_map_calc_cnt(prm) != 0)
1675 return -EAGAIN;
1676 }
1677
1678 *full_req_cnt = prm->req_cnt;
1679
1680 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1681 prm->residual = se_cmd->residual_count;
1682 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1683 "Residual underflow: %d (tag %d, "
1684 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1685 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1686 cmd->bufflen, prm->rq_result);
1687 prm->rq_result |= SS_RESIDUAL_UNDER;
1688 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1689 prm->residual = se_cmd->residual_count;
1690 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1691 "Residual overflow: %d (tag %d, "
1692 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1693 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1694 cmd->bufflen, prm->rq_result);
1695 prm->rq_result |= SS_RESIDUAL_OVER;
1696 }
1697
1698 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1699 /*
1700 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1701 * ignored in *xmit_response() below
1702 */
1703 if (qlt_has_data(cmd)) {
1704 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1705 (IS_FWI2_CAPABLE(ha) &&
1706 (prm->rq_result != 0))) {
1707 prm->add_status_pkt = 1;
1708 (*full_req_cnt)++;
1709 }
1710 }
1711 }
1712
1713 ql_dbg(ql_dbg_tgt, vha, 0xe016,
1714 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1715 prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1716
1717 return 0;
1718 }
1719
1720 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1721 struct qla_tgt_cmd *cmd, int sending_sense)
1722 {
1723 if (ha->tgt.enable_class_2)
1724 return 0;
1725
1726 if (sending_sense)
1727 return cmd->conf_compl_supported;
1728 else
1729 return ha->tgt.enable_explicit_conf &&
1730 cmd->conf_compl_supported;
1731 }
1732
1733 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1734 /*
1735 * Original taken from the XFS code
1736 */
1737 static unsigned long qlt_srr_random(void)
1738 {
1739 static int Inited;
1740 static unsigned long RandomValue;
1741 static DEFINE_SPINLOCK(lock);
1742 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1743 register long rv;
1744 register long lo;
1745 register long hi;
1746 unsigned long flags;
1747
1748 spin_lock_irqsave(&lock, flags);
1749 if (!Inited) {
1750 RandomValue = jiffies;
1751 Inited = 1;
1752 }
1753 rv = RandomValue;
1754 hi = rv / 127773;
1755 lo = rv % 127773;
1756 rv = 16807 * lo - 2836 * hi;
1757 if (rv <= 0)
1758 rv += 2147483647;
1759 RandomValue = rv;
1760 spin_unlock_irqrestore(&lock, flags);
1761 return rv;
1762 }
1763
1764 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1765 {
1766 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1767 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1768 == 50) {
1769 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1770 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1771 "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1772 }
1773 #endif
1774 /*
1775 * It's currently not possible to simulate SRRs for FCP_WRITE without
1776 * a physical link layer failure, so don't even try here..
1777 */
1778 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1779 return;
1780
1781 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1782 ((qlt_srr_random() % 100) == 20)) {
1783 int i, leave = 0;
1784 unsigned int tot_len = 0;
1785
1786 while (leave == 0)
1787 leave = qlt_srr_random() % cmd->sg_cnt;
1788
1789 for (i = 0; i < leave; i++)
1790 tot_len += cmd->sg[i].length;
1791
1792 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1793 "Cutting cmd %p (tag %d) buffer"
1794 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1795 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1796 cmd->bufflen, cmd->sg_cnt);
1797
1798 cmd->bufflen = tot_len;
1799 cmd->sg_cnt = leave;
1800 }
1801
1802 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1803 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1804
1805 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1806 "Cutting cmd %p (tag %d) buffer head "
1807 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1808 cmd->bufflen);
1809 if (offset == 0)
1810 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1811 else if (qlt_set_data_offset(cmd, offset)) {
1812 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1813 "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1814 }
1815 }
1816 }
1817 #else
1818 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1819 {}
1820 #endif
1821
1822 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1823 struct qla_tgt_prm *prm)
1824 {
1825 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1826 (uint32_t)sizeof(ctio->u.status1.sense_data));
1827 ctio->u.status0.flags |=
1828 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1829 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1830 ctio->u.status0.flags |= __constant_cpu_to_le16(
1831 CTIO7_FLAGS_EXPLICIT_CONFORM |
1832 CTIO7_FLAGS_CONFORM_REQ);
1833 }
1834 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1835 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1836 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1837 int i;
1838
1839 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1840 if (prm->cmd->se_cmd.scsi_status != 0) {
1841 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1842 "Skipping EXPLICIT_CONFORM and "
1843 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1844 "non GOOD status\n");
1845 goto skip_explict_conf;
1846 }
1847 ctio->u.status1.flags |= __constant_cpu_to_le16(
1848 CTIO7_FLAGS_EXPLICIT_CONFORM |
1849 CTIO7_FLAGS_CONFORM_REQ);
1850 }
1851 skip_explict_conf:
1852 ctio->u.status1.flags &=
1853 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1854 ctio->u.status1.flags |=
1855 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1856 ctio->u.status1.scsi_status |=
1857 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1858 ctio->u.status1.sense_length =
1859 cpu_to_le16(prm->sense_buffer_len);
1860 for (i = 0; i < prm->sense_buffer_len/4; i++)
1861 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1862 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1863 #if 0
1864 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1865 static int q;
1866 if (q < 10) {
1867 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1868 "qla_target(%d): %d bytes of sense "
1869 "lost", prm->tgt->ha->vp_idx,
1870 prm->sense_buffer_len % 4);
1871 q++;
1872 }
1873 }
1874 #endif
1875 } else {
1876 ctio->u.status1.flags &=
1877 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1878 ctio->u.status1.flags |=
1879 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1880 ctio->u.status1.sense_length = 0;
1881 memset(ctio->u.status1.sense_data, 0,
1882 sizeof(ctio->u.status1.sense_data));
1883 }
1884
1885 /* Sense with len > 24, is it possible ??? */
1886 }
1887
1888 /*
1889 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
1890 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
1891 */
1892 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
1893 uint8_t scsi_status)
1894 {
1895 struct scsi_qla_host *vha = cmd->vha;
1896 struct qla_hw_data *ha = vha->hw;
1897 struct ctio7_to_24xx *pkt;
1898 struct qla_tgt_prm prm;
1899 uint32_t full_req_cnt = 0;
1900 unsigned long flags = 0;
1901 int res;
1902
1903 memset(&prm, 0, sizeof(prm));
1904 qlt_check_srr_debug(cmd, &xmit_type);
1905
1906 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
1907 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
1908 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1909 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
1910
1911 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
1912 &full_req_cnt);
1913 if (unlikely(res != 0)) {
1914 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
1915 return 0;
1916
1917 return res;
1918 }
1919
1920 spin_lock_irqsave(&ha->hardware_lock, flags);
1921
1922 /* Does F/W have an IOCBs for this request */
1923 res = qlt_check_reserve_free_req(vha, full_req_cnt);
1924 if (unlikely(res))
1925 goto out_unmap_unlock;
1926
1927 res = qlt_24xx_build_ctio_pkt(&prm, vha);
1928 if (unlikely(res != 0))
1929 goto out_unmap_unlock;
1930
1931
1932 pkt = (struct ctio7_to_24xx *)prm.pkt;
1933
1934 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
1935 pkt->u.status0.flags |=
1936 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
1937 CTIO7_FLAGS_STATUS_MODE_0);
1938
1939 qlt_load_data_segments(&prm, vha);
1940
1941 if (prm.add_status_pkt == 0) {
1942 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1943 pkt->u.status0.scsi_status =
1944 cpu_to_le16(prm.rq_result);
1945 pkt->u.status0.residual =
1946 cpu_to_le32(prm.residual);
1947 pkt->u.status0.flags |= __constant_cpu_to_le16(
1948 CTIO7_FLAGS_SEND_STATUS);
1949 if (qlt_need_explicit_conf(ha, cmd, 0)) {
1950 pkt->u.status0.flags |=
1951 __constant_cpu_to_le16(
1952 CTIO7_FLAGS_EXPLICIT_CONFORM |
1953 CTIO7_FLAGS_CONFORM_REQ);
1954 }
1955 }
1956
1957 } else {
1958 /*
1959 * We have already made sure that there is sufficient
1960 * amount of request entries to not drop HW lock in
1961 * req_pkt().
1962 */
1963 struct ctio7_to_24xx *ctio =
1964 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
1965
1966 ql_dbg(ql_dbg_tgt, vha, 0xe019,
1967 "Building additional status packet\n");
1968
1969 memcpy(ctio, pkt, sizeof(*ctio));
1970 ctio->entry_count = 1;
1971 ctio->dseg_count = 0;
1972 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
1973 CTIO7_FLAGS_DATA_IN);
1974
1975 /* Real finish is ctio_m1's finish */
1976 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
1977 pkt->u.status0.flags |= __constant_cpu_to_le16(
1978 CTIO7_FLAGS_DONT_RET_CTIO);
1979 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
1980 &prm);
1981 pr_debug("Status CTIO7: %p\n", ctio);
1982 }
1983 } else
1984 qlt_24xx_init_ctio_to_isp(pkt, &prm);
1985
1986
1987 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
1988
1989 ql_dbg(ql_dbg_tgt, vha, 0xe01a,
1990 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
1991 pkt, scsi_status);
1992
1993 qla2x00_start_iocbs(vha, vha->req);
1994 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1995
1996 return 0;
1997
1998 out_unmap_unlock:
1999 if (cmd->sg_mapped)
2000 qlt_unmap_sg(vha, cmd);
2001 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2002
2003 return res;
2004 }
2005 EXPORT_SYMBOL(qlt_xmit_response);
2006
2007 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2008 {
2009 struct ctio7_to_24xx *pkt;
2010 struct scsi_qla_host *vha = cmd->vha;
2011 struct qla_hw_data *ha = vha->hw;
2012 struct qla_tgt *tgt = cmd->tgt;
2013 struct qla_tgt_prm prm;
2014 unsigned long flags;
2015 int res = 0;
2016
2017 memset(&prm, 0, sizeof(prm));
2018 prm.cmd = cmd;
2019 prm.tgt = tgt;
2020 prm.sg = NULL;
2021 prm.req_cnt = 1;
2022
2023 /* Send marker if required */
2024 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2025 return -EIO;
2026
2027 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2028 (int)vha->vp_idx);
2029
2030 /* Calculate number of entries and segments required */
2031 if (qlt_pci_map_calc_cnt(&prm) != 0)
2032 return -EAGAIN;
2033
2034 spin_lock_irqsave(&ha->hardware_lock, flags);
2035
2036 /* Does F/W have an IOCBs for this request */
2037 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2038 if (res != 0)
2039 goto out_unlock_free_unmap;
2040
2041 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2042 if (unlikely(res != 0))
2043 goto out_unlock_free_unmap;
2044 pkt = (struct ctio7_to_24xx *)prm.pkt;
2045 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2046 CTIO7_FLAGS_STATUS_MODE_0);
2047 qlt_load_data_segments(&prm, vha);
2048
2049 cmd->state = QLA_TGT_STATE_NEED_DATA;
2050
2051 qla2x00_start_iocbs(vha, vha->req);
2052 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2053
2054 return res;
2055
2056 out_unlock_free_unmap:
2057 if (cmd->sg_mapped)
2058 qlt_unmap_sg(vha, cmd);
2059 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2060
2061 return res;
2062 }
2063 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2064
2065 /* If hardware_lock held on entry, might drop it, then reaquire */
2066 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2067 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2068 struct qla_tgt_cmd *cmd,
2069 struct atio_from_isp *atio)
2070 {
2071 struct ctio7_to_24xx *ctio24;
2072 struct qla_hw_data *ha = vha->hw;
2073 request_t *pkt;
2074 int ret = 0;
2075
2076 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2077
2078 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2079 if (pkt == NULL) {
2080 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2081 "qla_target(%d): %s failed: unable to allocate "
2082 "request packet\n", vha->vp_idx, __func__);
2083 return -ENOMEM;
2084 }
2085
2086 if (cmd != NULL) {
2087 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2088 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2089 "qla_target(%d): Terminating cmd %p with "
2090 "incorrect state %d\n", vha->vp_idx, cmd,
2091 cmd->state);
2092 } else
2093 ret = 1;
2094 }
2095
2096 pkt->entry_count = 1;
2097 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2098
2099 ctio24 = (struct ctio7_to_24xx *)pkt;
2100 ctio24->entry_type = CTIO_TYPE7;
2101 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2102 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2103 ctio24->vp_index = vha->vp_idx;
2104 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2105 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2106 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2107 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2108 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2109 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2110 CTIO7_FLAGS_TERMINATE);
2111 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2112
2113 /* Most likely, it isn't needed */
2114 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2115 &atio->u.isp24.fcp_cmnd.add_cdb[
2116 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2117 if (ctio24->u.status1.residual != 0)
2118 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2119
2120 qla2x00_start_iocbs(vha, vha->req);
2121 return ret;
2122 }
2123
2124 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2125 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2126 {
2127 unsigned long flags;
2128 int rc;
2129
2130 if (qlt_issue_marker(vha, ha_locked) < 0)
2131 return;
2132
2133 if (ha_locked) {
2134 rc = __qlt_send_term_exchange(vha, cmd, atio);
2135 goto done;
2136 }
2137 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2138 rc = __qlt_send_term_exchange(vha, cmd, atio);
2139 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2140 done:
2141 if (rc == 1) {
2142 if (!ha_locked && !in_interrupt())
2143 msleep(250); /* just in case */
2144
2145 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2146 }
2147 }
2148
2149 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2150 {
2151 BUG_ON(cmd->sg_mapped);
2152
2153 if (unlikely(cmd->free_sg))
2154 kfree(cmd->sg);
2155 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2156 }
2157 EXPORT_SYMBOL(qlt_free_cmd);
2158
2159 /* ha->hardware_lock supposed to be held on entry */
2160 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2161 struct qla_tgt_cmd *cmd, void *ctio)
2162 {
2163 struct qla_tgt_srr_ctio *sc;
2164 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2165 struct qla_tgt_srr_imm *imm;
2166
2167 tgt->ctio_srr_id++;
2168
2169 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2170 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2171
2172 if (!ctio) {
2173 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2174 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2175 vha->vp_idx);
2176 return -EINVAL;
2177 }
2178
2179 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2180 if (sc != NULL) {
2181 sc->cmd = cmd;
2182 /* IRQ is already OFF */
2183 spin_lock(&tgt->srr_lock);
2184 sc->srr_id = tgt->ctio_srr_id;
2185 list_add_tail(&sc->srr_list_entry,
2186 &tgt->srr_ctio_list);
2187 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2188 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2189 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2190 int found = 0;
2191 list_for_each_entry(imm, &tgt->srr_imm_list,
2192 srr_list_entry) {
2193 if (imm->srr_id == sc->srr_id) {
2194 found = 1;
2195 break;
2196 }
2197 }
2198 if (found) {
2199 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2200 "Scheduling srr work\n");
2201 schedule_work(&tgt->srr_work);
2202 } else {
2203 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2204 "qla_target(%d): imm_srr_id "
2205 "== ctio_srr_id (%d), but there is no "
2206 "corresponding SRR IMM, deleting CTIO "
2207 "SRR %p\n", vha->vp_idx,
2208 tgt->ctio_srr_id, sc);
2209 list_del(&sc->srr_list_entry);
2210 spin_unlock(&tgt->srr_lock);
2211
2212 kfree(sc);
2213 return -EINVAL;
2214 }
2215 }
2216 spin_unlock(&tgt->srr_lock);
2217 } else {
2218 struct qla_tgt_srr_imm *ti;
2219
2220 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2221 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2222 vha->vp_idx);
2223 spin_lock(&tgt->srr_lock);
2224 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2225 srr_list_entry) {
2226 if (imm->srr_id == tgt->ctio_srr_id) {
2227 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2228 "IMM SRR %p deleted (id %d)\n",
2229 imm, imm->srr_id);
2230 list_del(&imm->srr_list_entry);
2231 qlt_reject_free_srr_imm(vha, imm, 1);
2232 }
2233 }
2234 spin_unlock(&tgt->srr_lock);
2235
2236 return -ENOMEM;
2237 }
2238
2239 return 0;
2240 }
2241
2242 /*
2243 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2244 */
2245 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2246 struct qla_tgt_cmd *cmd, uint32_t status)
2247 {
2248 int term = 0;
2249
2250 if (ctio != NULL) {
2251 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2252 term = !(c->flags &
2253 __constant_cpu_to_le16(OF_TERM_EXCH));
2254 } else
2255 term = 1;
2256
2257 if (term)
2258 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2259
2260 return term;
2261 }
2262
2263 /* ha->hardware_lock supposed to be held on entry */
2264 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2265 uint32_t handle)
2266 {
2267 struct qla_hw_data *ha = vha->hw;
2268
2269 handle--;
2270 if (ha->tgt.cmds[handle] != NULL) {
2271 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2272 ha->tgt.cmds[handle] = NULL;
2273 return cmd;
2274 } else
2275 return NULL;
2276 }
2277
2278 /* ha->hardware_lock supposed to be held on entry */
2279 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2280 uint32_t handle, void *ctio)
2281 {
2282 struct qla_tgt_cmd *cmd = NULL;
2283
2284 /* Clear out internal marks */
2285 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2286 CTIO_INTERMEDIATE_HANDLE_MARK);
2287
2288 if (handle != QLA_TGT_NULL_HANDLE) {
2289 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2290 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2291 "SKIP_HANDLE CTIO\n");
2292 return NULL;
2293 }
2294 /* handle-1 is actually used */
2295 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2296 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2297 "qla_target(%d): Wrong handle %x received\n",
2298 vha->vp_idx, handle);
2299 return NULL;
2300 }
2301 cmd = qlt_get_cmd(vha, handle);
2302 if (unlikely(cmd == NULL)) {
2303 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2304 "qla_target(%d): Suspicious: unable to "
2305 "find the command with handle %x\n", vha->vp_idx,
2306 handle);
2307 return NULL;
2308 }
2309 } else if (ctio != NULL) {
2310 /* We can't get loop ID from CTIO7 */
2311 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2312 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2313 "support NULL handles\n", vha->vp_idx);
2314 return NULL;
2315 }
2316
2317 return cmd;
2318 }
2319
2320 /*
2321 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2322 */
2323 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2324 uint32_t status, void *ctio)
2325 {
2326 struct qla_hw_data *ha = vha->hw;
2327 struct se_cmd *se_cmd;
2328 struct target_core_fabric_ops *tfo;
2329 struct qla_tgt_cmd *cmd;
2330
2331 ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2332 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2333 vha->vp_idx, ctio, status, handle);
2334
2335 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2336 /* That could happen only in case of an error/reset/abort */
2337 if (status != CTIO_SUCCESS) {
2338 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2339 "Intermediate CTIO received"
2340 " (status %x)\n", status);
2341 }
2342 return;
2343 }
2344
2345 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2346 if (cmd == NULL)
2347 return;
2348
2349 se_cmd = &cmd->se_cmd;
2350 tfo = se_cmd->se_tfo;
2351
2352 if (cmd->sg_mapped)
2353 qlt_unmap_sg(vha, cmd);
2354
2355 if (unlikely(status != CTIO_SUCCESS)) {
2356 switch (status & 0xFFFF) {
2357 case CTIO_LIP_RESET:
2358 case CTIO_TARGET_RESET:
2359 case CTIO_ABORTED:
2360 case CTIO_TIMEOUT:
2361 case CTIO_INVALID_RX_ID:
2362 /* They are OK */
2363 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2364 "qla_target(%d): CTIO with "
2365 "status %#x received, state %x, se_cmd %p, "
2366 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2367 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2368 status, cmd->state, se_cmd);
2369 break;
2370
2371 case CTIO_PORT_LOGGED_OUT:
2372 case CTIO_PORT_UNAVAILABLE:
2373 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2374 "qla_target(%d): CTIO with PORT LOGGED "
2375 "OUT (29) or PORT UNAVAILABLE (28) status %x "
2376 "received (state %x, se_cmd %p)\n", vha->vp_idx,
2377 status, cmd->state, se_cmd);
2378 break;
2379
2380 case CTIO_SRR_RECEIVED:
2381 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2382 "qla_target(%d): CTIO with SRR_RECEIVED"
2383 " status %x received (state %x, se_cmd %p)\n",
2384 vha->vp_idx, status, cmd->state, se_cmd);
2385 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2386 break;
2387 else
2388 return;
2389
2390 default:
2391 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2392 "qla_target(%d): CTIO with error status "
2393 "0x%x received (state %x, se_cmd %p\n",
2394 vha->vp_idx, status, cmd->state, se_cmd);
2395 break;
2396 }
2397
2398 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2399 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2400 return;
2401 }
2402
2403 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2404 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2405 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2406 int rx_status = 0;
2407
2408 cmd->state = QLA_TGT_STATE_DATA_IN;
2409
2410 if (unlikely(status != CTIO_SUCCESS))
2411 rx_status = -EIO;
2412 else
2413 cmd->write_data_transferred = 1;
2414
2415 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2416 "Data received, context %x, rx_status %d\n",
2417 0x0, rx_status);
2418
2419 ha->tgt.tgt_ops->handle_data(cmd);
2420 return;
2421 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2422 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2423 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2424 } else {
2425 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2426 "qla_target(%d): A command in state (%d) should "
2427 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2428 }
2429
2430 if (unlikely(status != CTIO_SUCCESS)) {
2431 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2432 dump_stack();
2433 }
2434
2435 ha->tgt.tgt_ops->free_cmd(cmd);
2436 }
2437
2438 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2439 uint8_t task_codes)
2440 {
2441 int fcp_task_attr;
2442
2443 switch (task_codes) {
2444 case ATIO_SIMPLE_QUEUE:
2445 fcp_task_attr = MSG_SIMPLE_TAG;
2446 break;
2447 case ATIO_HEAD_OF_QUEUE:
2448 fcp_task_attr = MSG_HEAD_TAG;
2449 break;
2450 case ATIO_ORDERED_QUEUE:
2451 fcp_task_attr = MSG_ORDERED_TAG;
2452 break;
2453 case ATIO_ACA_QUEUE:
2454 fcp_task_attr = MSG_ACA_TAG;
2455 break;
2456 case ATIO_UNTAGGED:
2457 fcp_task_attr = MSG_SIMPLE_TAG;
2458 break;
2459 default:
2460 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2461 "qla_target: unknown task code %x, use ORDERED instead\n",
2462 task_codes);
2463 fcp_task_attr = MSG_ORDERED_TAG;
2464 break;
2465 }
2466
2467 return fcp_task_attr;
2468 }
2469
2470 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2471 uint8_t *);
2472 /*
2473 * Process context for I/O path into tcm_qla2xxx code
2474 */
2475 static void qlt_do_work(struct work_struct *work)
2476 {
2477 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2478 scsi_qla_host_t *vha = cmd->vha;
2479 struct qla_hw_data *ha = vha->hw;
2480 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2481 struct qla_tgt_sess *sess = NULL;
2482 struct atio_from_isp *atio = &cmd->atio;
2483 unsigned char *cdb;
2484 unsigned long flags;
2485 uint32_t data_length;
2486 int ret, fcp_task_attr, data_dir, bidi = 0;
2487
2488 if (tgt->tgt_stop)
2489 goto out_term;
2490
2491 spin_lock_irqsave(&ha->hardware_lock, flags);
2492 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2493 atio->u.isp24.fcp_hdr.s_id);
2494 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2495 if (sess)
2496 kref_get(&sess->se_sess->sess_kref);
2497 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2498
2499 if (unlikely(!sess)) {
2500 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2501
2502 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2503 "qla_target(%d): Unable to find wwn login"
2504 " (s_id %x:%x:%x), trying to create it manually\n",
2505 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2506
2507 if (atio->u.raw.entry_count > 1) {
2508 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2509 "Dropping multy entry cmd %p\n", cmd);
2510 goto out_term;
2511 }
2512
2513 mutex_lock(&vha->vha_tgt.tgt_mutex);
2514 sess = qlt_make_local_sess(vha, s_id);
2515 /* sess has an extra creation ref. */
2516 mutex_unlock(&vha->vha_tgt.tgt_mutex);
2517
2518 if (!sess)
2519 goto out_term;
2520 }
2521
2522 cmd->sess = sess;
2523 cmd->loop_id = sess->loop_id;
2524 cmd->conf_compl_supported = sess->conf_compl_supported;
2525
2526 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2527 cmd->tag = atio->u.isp24.exchange_addr;
2528 cmd->unpacked_lun = scsilun_to_int(
2529 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2530
2531 if (atio->u.isp24.fcp_cmnd.rddata &&
2532 atio->u.isp24.fcp_cmnd.wrdata) {
2533 bidi = 1;
2534 data_dir = DMA_TO_DEVICE;
2535 } else if (atio->u.isp24.fcp_cmnd.rddata)
2536 data_dir = DMA_FROM_DEVICE;
2537 else if (atio->u.isp24.fcp_cmnd.wrdata)
2538 data_dir = DMA_TO_DEVICE;
2539 else
2540 data_dir = DMA_NONE;
2541
2542 fcp_task_attr = qlt_get_fcp_task_attr(vha,
2543 atio->u.isp24.fcp_cmnd.task_attr);
2544 data_length = be32_to_cpu(get_unaligned((uint32_t *)
2545 &atio->u.isp24.fcp_cmnd.add_cdb[
2546 atio->u.isp24.fcp_cmnd.add_cdb_len]));
2547
2548 ql_dbg(ql_dbg_tgt, vha, 0xe022,
2549 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2550 cmd, cmd->unpacked_lun, cmd->tag);
2551
2552 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2553 fcp_task_attr, data_dir, bidi);
2554 if (ret != 0)
2555 goto out_term;
2556 /*
2557 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2558 */
2559 spin_lock_irqsave(&ha->hardware_lock, flags);
2560 ha->tgt.tgt_ops->put_sess(sess);
2561 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2562 return;
2563
2564 out_term:
2565 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2566 /*
2567 * cmd has not sent to target yet, so pass NULL as the second
2568 * argument to qlt_send_term_exchange() and free the memory here.
2569 */
2570 spin_lock_irqsave(&ha->hardware_lock, flags);
2571 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2572 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2573 if (sess)
2574 ha->tgt.tgt_ops->put_sess(sess);
2575 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2576 }
2577
2578 /* ha->hardware_lock supposed to be held on entry */
2579 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2580 struct atio_from_isp *atio)
2581 {
2582 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2583 struct qla_tgt_cmd *cmd;
2584
2585 if (unlikely(tgt->tgt_stop)) {
2586 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2587 "New command while device %p is shutting down\n", tgt);
2588 return -EFAULT;
2589 }
2590
2591 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2592 if (!cmd) {
2593 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2594 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2595 return -ENOMEM;
2596 }
2597
2598 memcpy(&cmd->atio, atio, sizeof(*atio));
2599 cmd->state = QLA_TGT_STATE_NEW;
2600 cmd->tgt = vha->vha_tgt.qla_tgt;
2601 cmd->vha = vha;
2602
2603 INIT_WORK(&cmd->work, qlt_do_work);
2604 queue_work(qla_tgt_wq, &cmd->work);
2605 return 0;
2606
2607 }
2608
2609 /* ha->hardware_lock supposed to be held on entry */
2610 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2611 int fn, void *iocb, int flags)
2612 {
2613 struct scsi_qla_host *vha = sess->vha;
2614 struct qla_hw_data *ha = vha->hw;
2615 struct qla_tgt_mgmt_cmd *mcmd;
2616 int res;
2617 uint8_t tmr_func;
2618
2619 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2620 if (!mcmd) {
2621 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2622 "qla_target(%d): Allocation of management "
2623 "command failed, some commands and their data could "
2624 "leak\n", vha->vp_idx);
2625 return -ENOMEM;
2626 }
2627 memset(mcmd, 0, sizeof(*mcmd));
2628 mcmd->sess = sess;
2629
2630 if (iocb) {
2631 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2632 sizeof(mcmd->orig_iocb.imm_ntfy));
2633 }
2634 mcmd->tmr_func = fn;
2635 mcmd->flags = flags;
2636
2637 switch (fn) {
2638 case QLA_TGT_CLEAR_ACA:
2639 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2640 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2641 tmr_func = TMR_CLEAR_ACA;
2642 break;
2643
2644 case QLA_TGT_TARGET_RESET:
2645 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2646 "qla_target(%d): TARGET_RESET received\n",
2647 sess->vha->vp_idx);
2648 tmr_func = TMR_TARGET_WARM_RESET;
2649 break;
2650
2651 case QLA_TGT_LUN_RESET:
2652 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2653 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2654 tmr_func = TMR_LUN_RESET;
2655 break;
2656
2657 case QLA_TGT_CLEAR_TS:
2658 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2659 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2660 tmr_func = TMR_CLEAR_TASK_SET;
2661 break;
2662
2663 case QLA_TGT_ABORT_TS:
2664 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2665 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2666 tmr_func = TMR_ABORT_TASK_SET;
2667 break;
2668 #if 0
2669 case QLA_TGT_ABORT_ALL:
2670 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2671 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2672 sess->vha->vp_idx);
2673 tmr_func = 0;
2674 break;
2675
2676 case QLA_TGT_ABORT_ALL_SESS:
2677 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2678 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2679 sess->vha->vp_idx);
2680 tmr_func = 0;
2681 break;
2682
2683 case QLA_TGT_NEXUS_LOSS_SESS:
2684 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2685 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2686 sess->vha->vp_idx);
2687 tmr_func = 0;
2688 break;
2689
2690 case QLA_TGT_NEXUS_LOSS:
2691 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2692 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2693 tmr_func = 0;
2694 break;
2695 #endif
2696 default:
2697 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2698 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2699 sess->vha->vp_idx, fn);
2700 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2701 return -ENOSYS;
2702 }
2703
2704 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2705 if (res != 0) {
2706 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2707 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2708 sess->vha->vp_idx, res);
2709 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2710 return -EFAULT;
2711 }
2712
2713 return 0;
2714 }
2715
2716 /* ha->hardware_lock supposed to be held on entry */
2717 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2718 {
2719 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2720 struct qla_hw_data *ha = vha->hw;
2721 struct qla_tgt *tgt;
2722 struct qla_tgt_sess *sess;
2723 uint32_t lun, unpacked_lun;
2724 int lun_size, fn;
2725
2726 tgt = vha->vha_tgt.qla_tgt;
2727
2728 lun = a->u.isp24.fcp_cmnd.lun;
2729 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2730 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2731 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2732 a->u.isp24.fcp_hdr.s_id);
2733 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2734
2735 if (!sess) {
2736 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2737 "qla_target(%d): task mgmt fn 0x%x for "
2738 "non-existant session\n", vha->vp_idx, fn);
2739 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2740 sizeof(struct atio_from_isp));
2741 }
2742
2743 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2744 }
2745
2746 /* ha->hardware_lock supposed to be held on entry */
2747 static int __qlt_abort_task(struct scsi_qla_host *vha,
2748 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2749 {
2750 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2751 struct qla_hw_data *ha = vha->hw;
2752 struct qla_tgt_mgmt_cmd *mcmd;
2753 uint32_t lun, unpacked_lun;
2754 int rc;
2755
2756 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2757 if (mcmd == NULL) {
2758 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2759 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2760 vha->vp_idx, __func__);
2761 return -ENOMEM;
2762 }
2763 memset(mcmd, 0, sizeof(*mcmd));
2764
2765 mcmd->sess = sess;
2766 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2767 sizeof(mcmd->orig_iocb.imm_ntfy));
2768
2769 lun = a->u.isp24.fcp_cmnd.lun;
2770 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2771
2772 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2773 le16_to_cpu(iocb->u.isp2x.seq_id));
2774 if (rc != 0) {
2775 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2776 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2777 vha->vp_idx, rc);
2778 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2779 return -EFAULT;
2780 }
2781
2782 return 0;
2783 }
2784
2785 /* ha->hardware_lock supposed to be held on entry */
2786 static int qlt_abort_task(struct scsi_qla_host *vha,
2787 struct imm_ntfy_from_isp *iocb)
2788 {
2789 struct qla_hw_data *ha = vha->hw;
2790 struct qla_tgt_sess *sess;
2791 int loop_id;
2792
2793 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2794
2795 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2796 if (sess == NULL) {
2797 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2798 "qla_target(%d): task abort for unexisting "
2799 "session\n", vha->vp_idx);
2800 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
2801 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2802 }
2803
2804 return __qlt_abort_task(vha, iocb, sess);
2805 }
2806
2807 /*
2808 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2809 */
2810 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2811 struct imm_ntfy_from_isp *iocb)
2812 {
2813 int res = 0;
2814
2815 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2816 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
2817 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
2818
2819 switch (iocb->u.isp24.status_subcode) {
2820 case ELS_PLOGI:
2821 case ELS_FLOGI:
2822 case ELS_PRLI:
2823 case ELS_LOGO:
2824 case ELS_PRLO:
2825 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2826 break;
2827 case ELS_PDISC:
2828 case ELS_ADISC:
2829 {
2830 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2831 if (tgt->link_reinit_iocb_pending) {
2832 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2833 0, 0, 0, 0, 0, 0);
2834 tgt->link_reinit_iocb_pending = 0;
2835 }
2836 res = 1; /* send notify ack */
2837 break;
2838 }
2839
2840 default:
2841 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2842 "qla_target(%d): Unsupported ELS command %x "
2843 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2844 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2845 break;
2846 }
2847
2848 return res;
2849 }
2850
2851 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
2852 {
2853 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
2854 size_t first_offset = 0, rem_offset = offset, tmp = 0;
2855 int i, sg_srr_cnt, bufflen = 0;
2856
2857 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
2858 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
2859 "cmd->sg_cnt: %u, direction: %d\n",
2860 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2861
2862 /*
2863 * FIXME: Reject non zero SRR relative offset until we can test
2864 * this code properly.
2865 */
2866 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
2867 return -1;
2868
2869 if (!cmd->sg || !cmd->sg_cnt) {
2870 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
2871 "Missing cmd->sg or zero cmd->sg_cnt in"
2872 " qla_tgt_set_data_offset\n");
2873 return -EINVAL;
2874 }
2875 /*
2876 * Walk the current cmd->sg list until we locate the new sg_srr_start
2877 */
2878 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
2879 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
2880 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
2881 i, sg, sg_page(sg), sg->length, sg->offset);
2882
2883 if ((sg->length + tmp) > offset) {
2884 first_offset = rem_offset;
2885 sg_srr_start = sg;
2886 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
2887 "Found matching sg[%d], using %p as sg_srr_start, "
2888 "and using first_offset: %zu\n", i, sg,
2889 first_offset);
2890 break;
2891 }
2892 tmp += sg->length;
2893 rem_offset -= sg->length;
2894 }
2895
2896 if (!sg_srr_start) {
2897 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
2898 "Unable to locate sg_srr_start for offset: %u\n", offset);
2899 return -EINVAL;
2900 }
2901 sg_srr_cnt = (cmd->sg_cnt - i);
2902
2903 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
2904 if (!sg_srr) {
2905 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
2906 "Unable to allocate sgp\n");
2907 return -ENOMEM;
2908 }
2909 sg_init_table(sg_srr, sg_srr_cnt);
2910 sgp = &sg_srr[0];
2911 /*
2912 * Walk the remaining list for sg_srr_start, mapping to the newly
2913 * allocated sg_srr taking first_offset into account.
2914 */
2915 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
2916 if (first_offset) {
2917 sg_set_page(sgp, sg_page(sg),
2918 (sg->length - first_offset), first_offset);
2919 first_offset = 0;
2920 } else {
2921 sg_set_page(sgp, sg_page(sg), sg->length, 0);
2922 }
2923 bufflen += sgp->length;
2924
2925 sgp = sg_next(sgp);
2926 if (!sgp)
2927 break;
2928 }
2929
2930 cmd->sg = sg_srr;
2931 cmd->sg_cnt = sg_srr_cnt;
2932 cmd->bufflen = bufflen;
2933 cmd->offset += offset;
2934 cmd->free_sg = 1;
2935
2936 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
2937 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
2938 cmd->sg_cnt);
2939 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
2940 cmd->bufflen);
2941 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
2942 cmd->offset);
2943
2944 if (cmd->sg_cnt < 0)
2945 BUG();
2946
2947 if (cmd->bufflen < 0)
2948 BUG();
2949
2950 return 0;
2951 }
2952
2953 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
2954 uint32_t srr_rel_offs, int *xmit_type)
2955 {
2956 int res = 0, rel_offs;
2957
2958 rel_offs = srr_rel_offs - cmd->offset;
2959 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
2960 srr_rel_offs, rel_offs);
2961
2962 *xmit_type = QLA_TGT_XMIT_ALL;
2963
2964 if (rel_offs < 0) {
2965 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
2966 "qla_target(%d): SRR rel_offs (%d) < 0",
2967 cmd->vha->vp_idx, rel_offs);
2968 res = -1;
2969 } else if (rel_offs == cmd->bufflen)
2970 *xmit_type = QLA_TGT_XMIT_STATUS;
2971 else if (rel_offs > 0)
2972 res = qlt_set_data_offset(cmd, rel_offs);
2973
2974 return res;
2975 }
2976
2977 /* No locks, thread context */
2978 static void qlt_handle_srr(struct scsi_qla_host *vha,
2979 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
2980 {
2981 struct imm_ntfy_from_isp *ntfy =
2982 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
2983 struct qla_hw_data *ha = vha->hw;
2984 struct qla_tgt_cmd *cmd = sctio->cmd;
2985 struct se_cmd *se_cmd = &cmd->se_cmd;
2986 unsigned long flags;
2987 int xmit_type = 0, resp = 0;
2988 uint32_t offset;
2989 uint16_t srr_ui;
2990
2991 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
2992 srr_ui = ntfy->u.isp24.srr_ui;
2993
2994 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
2995 cmd, srr_ui);
2996
2997 switch (srr_ui) {
2998 case SRR_IU_STATUS:
2999 spin_lock_irqsave(&ha->hardware_lock, flags);
3000 qlt_send_notify_ack(vha, ntfy,
3001 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3002 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3003 xmit_type = QLA_TGT_XMIT_STATUS;
3004 resp = 1;
3005 break;
3006 case SRR_IU_DATA_IN:
3007 if (!cmd->sg || !cmd->sg_cnt) {
3008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3009 "Unable to process SRR_IU_DATA_IN due to"
3010 " missing cmd->sg, state: %d\n", cmd->state);
3011 dump_stack();
3012 goto out_reject;
3013 }
3014 if (se_cmd->scsi_status != 0) {
3015 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3016 "Rejecting SRR_IU_DATA_IN with non GOOD "
3017 "scsi_status\n");
3018 goto out_reject;
3019 }
3020 cmd->bufflen = se_cmd->data_length;
3021
3022 if (qlt_has_data(cmd)) {
3023 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3024 goto out_reject;
3025 spin_lock_irqsave(&ha->hardware_lock, flags);
3026 qlt_send_notify_ack(vha, ntfy,
3027 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3028 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3029 resp = 1;
3030 } else {
3031 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3032 "qla_target(%d): SRR for in data for cmd "
3033 "without them (tag %d, SCSI status %d), "
3034 "reject", vha->vp_idx, cmd->tag,
3035 cmd->se_cmd.scsi_status);
3036 goto out_reject;
3037 }
3038 break;
3039 case SRR_IU_DATA_OUT:
3040 if (!cmd->sg || !cmd->sg_cnt) {
3041 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3042 "Unable to process SRR_IU_DATA_OUT due to"
3043 " missing cmd->sg\n");
3044 dump_stack();
3045 goto out_reject;
3046 }
3047 if (se_cmd->scsi_status != 0) {
3048 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3049 "Rejecting SRR_IU_DATA_OUT"
3050 " with non GOOD scsi_status\n");
3051 goto out_reject;
3052 }
3053 cmd->bufflen = se_cmd->data_length;
3054
3055 if (qlt_has_data(cmd)) {
3056 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3057 goto out_reject;
3058 spin_lock_irqsave(&ha->hardware_lock, flags);
3059 qlt_send_notify_ack(vha, ntfy,
3060 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3061 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3062 if (xmit_type & QLA_TGT_XMIT_DATA)
3063 qlt_rdy_to_xfer(cmd);
3064 } else {
3065 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3066 "qla_target(%d): SRR for out data for cmd "
3067 "without them (tag %d, SCSI status %d), "
3068 "reject", vha->vp_idx, cmd->tag,
3069 cmd->se_cmd.scsi_status);
3070 goto out_reject;
3071 }
3072 break;
3073 default:
3074 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3075 "qla_target(%d): Unknown srr_ui value %x",
3076 vha->vp_idx, srr_ui);
3077 goto out_reject;
3078 }
3079
3080 /* Transmit response in case of status and data-in cases */
3081 if (resp)
3082 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3083
3084 return;
3085
3086 out_reject:
3087 spin_lock_irqsave(&ha->hardware_lock, flags);
3088 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3089 NOTIFY_ACK_SRR_FLAGS_REJECT,
3090 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3091 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3092 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3093 cmd->state = QLA_TGT_STATE_DATA_IN;
3094 dump_stack();
3095 } else
3096 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3097 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3098 }
3099
3100 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3101 struct qla_tgt_srr_imm *imm, int ha_locked)
3102 {
3103 struct qla_hw_data *ha = vha->hw;
3104 unsigned long flags = 0;
3105
3106 if (!ha_locked)
3107 spin_lock_irqsave(&ha->hardware_lock, flags);
3108
3109 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3110 NOTIFY_ACK_SRR_FLAGS_REJECT,
3111 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3112 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3113
3114 if (!ha_locked)
3115 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3116
3117 kfree(imm);
3118 }
3119
3120 static void qlt_handle_srr_work(struct work_struct *work)
3121 {
3122 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3123 struct scsi_qla_host *vha = tgt->vha;
3124 struct qla_tgt_srr_ctio *sctio;
3125 unsigned long flags;
3126
3127 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3128 tgt);
3129
3130 restart:
3131 spin_lock_irqsave(&tgt->srr_lock, flags);
3132 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3133 struct qla_tgt_srr_imm *imm, *i, *ti;
3134 struct qla_tgt_cmd *cmd;
3135 struct se_cmd *se_cmd;
3136
3137 imm = NULL;
3138 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3139 srr_list_entry) {
3140 if (i->srr_id == sctio->srr_id) {
3141 list_del(&i->srr_list_entry);
3142 if (imm) {
3143 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3144 "qla_target(%d): There must be "
3145 "only one IMM SRR per CTIO SRR "
3146 "(IMM SRR %p, id %d, CTIO %p\n",
3147 vha->vp_idx, i, i->srr_id, sctio);
3148 qlt_reject_free_srr_imm(tgt->vha, i, 0);
3149 } else
3150 imm = i;
3151 }
3152 }
3153
3154 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3155 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3156 sctio->srr_id);
3157
3158 if (imm == NULL) {
3159 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3160 "Not found matching IMM for SRR CTIO (id %d)\n",
3161 sctio->srr_id);
3162 continue;
3163 } else
3164 list_del(&sctio->srr_list_entry);
3165
3166 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3167
3168 cmd = sctio->cmd;
3169 /*
3170 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3171 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3172 * logic..
3173 */
3174 cmd->offset = 0;
3175 if (cmd->free_sg) {
3176 kfree(cmd->sg);
3177 cmd->sg = NULL;
3178 cmd->free_sg = 0;
3179 }
3180 se_cmd = &cmd->se_cmd;
3181
3182 cmd->sg_cnt = se_cmd->t_data_nents;
3183 cmd->sg = se_cmd->t_data_sg;
3184
3185 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3186 "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3187 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3188 se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3189
3190 qlt_handle_srr(vha, sctio, imm);
3191
3192 kfree(imm);
3193 kfree(sctio);
3194 goto restart;
3195 }
3196 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3197 }
3198
3199 /* ha->hardware_lock supposed to be held on entry */
3200 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3201 struct imm_ntfy_from_isp *iocb)
3202 {
3203 struct qla_tgt_srr_imm *imm;
3204 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3205 struct qla_tgt_srr_ctio *sctio;
3206
3207 tgt->imm_srr_id++;
3208
3209 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3210 vha->vp_idx);
3211
3212 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3213 if (imm != NULL) {
3214 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3215
3216 /* IRQ is already OFF */
3217 spin_lock(&tgt->srr_lock);
3218 imm->srr_id = tgt->imm_srr_id;
3219 list_add_tail(&imm->srr_list_entry,
3220 &tgt->srr_imm_list);
3221 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3222 "IMM NTFY SRR %p added (id %d, ui %x)\n",
3223 imm, imm->srr_id, iocb->u.isp24.srr_ui);
3224 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3225 int found = 0;
3226 list_for_each_entry(sctio, &tgt->srr_ctio_list,
3227 srr_list_entry) {
3228 if (sctio->srr_id == imm->srr_id) {
3229 found = 1;
3230 break;
3231 }
3232 }
3233 if (found) {
3234 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3235 "Scheduling srr work\n");
3236 schedule_work(&tgt->srr_work);
3237 } else {
3238 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3239 "qla_target(%d): imm_srr_id "
3240 "== ctio_srr_id (%d), but there is no "
3241 "corresponding SRR CTIO, deleting IMM "
3242 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3243 imm);
3244 list_del(&imm->srr_list_entry);
3245
3246 kfree(imm);
3247
3248 spin_unlock(&tgt->srr_lock);
3249 goto out_reject;
3250 }
3251 }
3252 spin_unlock(&tgt->srr_lock);
3253 } else {
3254 struct qla_tgt_srr_ctio *ts;
3255
3256 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3257 "qla_target(%d): Unable to allocate SRR IMM "
3258 "entry, SRR request will be rejected\n", vha->vp_idx);
3259
3260 /* IRQ is already OFF */
3261 spin_lock(&tgt->srr_lock);
3262 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3263 srr_list_entry) {
3264 if (sctio->srr_id == tgt->imm_srr_id) {
3265 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3266 "CTIO SRR %p deleted (id %d)\n",
3267 sctio, sctio->srr_id);
3268 list_del(&sctio->srr_list_entry);
3269 qlt_send_term_exchange(vha, sctio->cmd,
3270 &sctio->cmd->atio, 1);
3271 kfree(sctio);
3272 }
3273 }
3274 spin_unlock(&tgt->srr_lock);
3275 goto out_reject;
3276 }
3277
3278 return;
3279
3280 out_reject:
3281 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3282 NOTIFY_ACK_SRR_FLAGS_REJECT,
3283 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3284 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3285 }
3286
3287 /*
3288 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3289 */
3290 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3291 struct imm_ntfy_from_isp *iocb)
3292 {
3293 struct qla_hw_data *ha = vha->hw;
3294 uint32_t add_flags = 0;
3295 int send_notify_ack = 1;
3296 uint16_t status;
3297
3298 status = le16_to_cpu(iocb->u.isp2x.status);
3299 switch (status) {
3300 case IMM_NTFY_LIP_RESET:
3301 {
3302 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3303 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3304 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3305 iocb->u.isp24.status_subcode);
3306
3307 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3308 send_notify_ack = 0;
3309 break;
3310 }
3311
3312 case IMM_NTFY_LIP_LINK_REINIT:
3313 {
3314 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3315 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3316 "qla_target(%d): LINK REINIT (loop %#x, "
3317 "subcode %x)\n", vha->vp_idx,
3318 le16_to_cpu(iocb->u.isp24.nport_handle),
3319 iocb->u.isp24.status_subcode);
3320 if (tgt->link_reinit_iocb_pending) {
3321 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3322 0, 0, 0, 0, 0, 0);
3323 }
3324 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3325 tgt->link_reinit_iocb_pending = 1;
3326 /*
3327 * QLogic requires to wait after LINK REINIT for possible
3328 * PDISC or ADISC ELS commands
3329 */
3330 send_notify_ack = 0;
3331 break;
3332 }
3333
3334 case IMM_NTFY_PORT_LOGOUT:
3335 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3336 "qla_target(%d): Port logout (loop "
3337 "%#x, subcode %x)\n", vha->vp_idx,
3338 le16_to_cpu(iocb->u.isp24.nport_handle),
3339 iocb->u.isp24.status_subcode);
3340
3341 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3342 send_notify_ack = 0;
3343 /* The sessions will be cleared in the callback, if needed */
3344 break;
3345
3346 case IMM_NTFY_GLBL_TPRLO:
3347 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3348 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3349 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3350 send_notify_ack = 0;
3351 /* The sessions will be cleared in the callback, if needed */
3352 break;
3353
3354 case IMM_NTFY_PORT_CONFIG:
3355 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3356 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3357 status);
3358 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3359 send_notify_ack = 0;
3360 /* The sessions will be cleared in the callback, if needed */
3361 break;
3362
3363 case IMM_NTFY_GLBL_LOGO:
3364 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3365 "qla_target(%d): Link failure detected\n",
3366 vha->vp_idx);
3367 /* I_T nexus loss */
3368 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3369 send_notify_ack = 0;
3370 break;
3371
3372 case IMM_NTFY_IOCB_OVERFLOW:
3373 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3374 "qla_target(%d): Cannot provide requested "
3375 "capability (IOCB overflowed the immediate notify "
3376 "resource count)\n", vha->vp_idx);
3377 break;
3378
3379 case IMM_NTFY_ABORT_TASK:
3380 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3381 "qla_target(%d): Abort Task (S %08x I %#x -> "
3382 "L %#x)\n", vha->vp_idx,
3383 le16_to_cpu(iocb->u.isp2x.seq_id),
3384 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3385 le16_to_cpu(iocb->u.isp2x.lun));
3386 if (qlt_abort_task(vha, iocb) == 0)
3387 send_notify_ack = 0;
3388 break;
3389
3390 case IMM_NTFY_RESOURCE:
3391 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3392 "qla_target(%d): Out of resources, host %ld\n",
3393 vha->vp_idx, vha->host_no);
3394 break;
3395
3396 case IMM_NTFY_MSG_RX:
3397 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3398 "qla_target(%d): Immediate notify task %x\n",
3399 vha->vp_idx, iocb->u.isp2x.task_flags);
3400 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3401 send_notify_ack = 0;
3402 break;
3403
3404 case IMM_NTFY_ELS:
3405 if (qlt_24xx_handle_els(vha, iocb) == 0)
3406 send_notify_ack = 0;
3407 break;
3408
3409 case IMM_NTFY_SRR:
3410 qlt_prepare_srr_imm(vha, iocb);
3411 send_notify_ack = 0;
3412 break;
3413
3414 default:
3415 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3416 "qla_target(%d): Received unknown immediate "
3417 "notify status %x\n", vha->vp_idx, status);
3418 break;
3419 }
3420
3421 if (send_notify_ack)
3422 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3423 }
3424
3425 /*
3426 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3427 * This function sends busy to ISP 2xxx or 24xx.
3428 */
3429 static void qlt_send_busy(struct scsi_qla_host *vha,
3430 struct atio_from_isp *atio, uint16_t status)
3431 {
3432 struct ctio7_to_24xx *ctio24;
3433 struct qla_hw_data *ha = vha->hw;
3434 request_t *pkt;
3435 struct qla_tgt_sess *sess = NULL;
3436
3437 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3438 atio->u.isp24.fcp_hdr.s_id);
3439 if (!sess) {
3440 qlt_send_term_exchange(vha, NULL, atio, 1);
3441 return;
3442 }
3443 /* Sending marker isn't necessary, since we called from ISR */
3444
3445 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3446 if (!pkt) {
3447 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3448 "qla_target(%d): %s failed: unable to allocate "
3449 "request packet", vha->vp_idx, __func__);
3450 return;
3451 }
3452
3453 pkt->entry_count = 1;
3454 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3455
3456 ctio24 = (struct ctio7_to_24xx *)pkt;
3457 ctio24->entry_type = CTIO_TYPE7;
3458 ctio24->nport_handle = sess->loop_id;
3459 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3460 ctio24->vp_index = vha->vp_idx;
3461 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3462 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3463 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3464 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3465 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3466 __constant_cpu_to_le16(
3467 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3468 CTIO7_FLAGS_DONT_RET_CTIO);
3469 /*
3470 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3471 * if the explicit conformation is used.
3472 */
3473 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3474 ctio24->u.status1.scsi_status = cpu_to_le16(status);
3475 ctio24->u.status1.residual = get_unaligned((uint32_t *)
3476 &atio->u.isp24.fcp_cmnd.add_cdb[
3477 atio->u.isp24.fcp_cmnd.add_cdb_len]);
3478 if (ctio24->u.status1.residual != 0)
3479 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3480
3481 qla2x00_start_iocbs(vha, vha->req);
3482 }
3483
3484 /* ha->hardware_lock supposed to be held on entry */
3485 /* called via callback from qla2xxx */
3486 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3487 struct atio_from_isp *atio)
3488 {
3489 struct qla_hw_data *ha = vha->hw;
3490 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3491 int rc;
3492
3493 if (unlikely(tgt == NULL)) {
3494 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3495 "ATIO pkt, but no tgt (ha %p)", ha);
3496 return;
3497 }
3498 ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3499 "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3500 vha->vp_idx, atio, atio->u.raw.entry_type,
3501 atio->u.raw.entry_count);
3502 /*
3503 * In tgt_stop mode we also should allow all requests to pass.
3504 * Otherwise, some commands can stuck.
3505 */
3506
3507 tgt->irq_cmd_count++;
3508
3509 switch (atio->u.raw.entry_type) {
3510 case ATIO_TYPE7:
3511 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3512 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3513 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3514 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3515 atio->u.isp24.fcp_cmnd.rddata,
3516 atio->u.isp24.fcp_cmnd.wrdata,
3517 atio->u.isp24.fcp_cmnd.add_cdb_len,
3518 be32_to_cpu(get_unaligned((uint32_t *)
3519 &atio->u.isp24.fcp_cmnd.add_cdb[
3520 atio->u.isp24.fcp_cmnd.add_cdb_len])),
3521 atio->u.isp24.fcp_hdr.s_id[0],
3522 atio->u.isp24.fcp_hdr.s_id[1],
3523 atio->u.isp24.fcp_hdr.s_id[2]);
3524
3525 if (unlikely(atio->u.isp24.exchange_addr ==
3526 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3527 ql_dbg(ql_dbg_tgt, vha, 0xe058,
3528 "qla_target(%d): ATIO_TYPE7 "
3529 "received with UNKNOWN exchange address, "
3530 "sending QUEUE_FULL\n", vha->vp_idx);
3531 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3532 break;
3533 }
3534 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3535 rc = qlt_handle_cmd_for_atio(vha, atio);
3536 else
3537 rc = qlt_handle_task_mgmt(vha, atio);
3538 if (unlikely(rc != 0)) {
3539 if (rc == -ESRCH) {
3540 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3541 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3542 #else
3543 qlt_send_term_exchange(vha, NULL, atio, 1);
3544 #endif
3545 } else {
3546 if (tgt->tgt_stop) {
3547 ql_dbg(ql_dbg_tgt, vha, 0xe059,
3548 "qla_target: Unable to send "
3549 "command to target for req, "
3550 "ignoring.\n");
3551 } else {
3552 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3553 "qla_target(%d): Unable to send "
3554 "command to target, sending BUSY "
3555 "status.\n", vha->vp_idx);
3556 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3557 }
3558 }
3559 }
3560 break;
3561
3562 case IMMED_NOTIFY_TYPE:
3563 {
3564 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3565 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3566 "qla_target(%d): Received ATIO packet %x "
3567 "with error status %x\n", vha->vp_idx,
3568 atio->u.raw.entry_type,
3569 atio->u.isp2x.entry_status);
3570 break;
3571 }
3572 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3573 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3574 break;
3575 }
3576
3577 default:
3578 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3579 "qla_target(%d): Received unknown ATIO atio "
3580 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3581 break;
3582 }
3583
3584 tgt->irq_cmd_count--;
3585 }
3586
3587 /* ha->hardware_lock supposed to be held on entry */
3588 /* called via callback from qla2xxx */
3589 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3590 {
3591 struct qla_hw_data *ha = vha->hw;
3592 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3593
3594 if (unlikely(tgt == NULL)) {
3595 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3596 "qla_target(%d): Response pkt %x received, but no "
3597 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3598 return;
3599 }
3600
3601 ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3602 "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3603 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3604 pkt->entry_count, pkt->entry_status, pkt->handle);
3605
3606 /*
3607 * In tgt_stop mode we also should allow all requests to pass.
3608 * Otherwise, some commands can stuck.
3609 */
3610
3611 tgt->irq_cmd_count++;
3612
3613 switch (pkt->entry_type) {
3614 case CTIO_TYPE7:
3615 {
3616 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3617 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3618 vha->vp_idx);
3619 qlt_do_ctio_completion(vha, entry->handle,
3620 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3621 entry);
3622 break;
3623 }
3624
3625 case ACCEPT_TGT_IO_TYPE:
3626 {
3627 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3628 int rc;
3629 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3630 "ACCEPT_TGT_IO instance %d status %04x "
3631 "lun %04x read/write %d data_length %04x "
3632 "target_id %02x rx_id %04x\n ", vha->vp_idx,
3633 le16_to_cpu(atio->u.isp2x.status),
3634 le16_to_cpu(atio->u.isp2x.lun),
3635 atio->u.isp2x.execution_codes,
3636 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3637 atio), atio->u.isp2x.rx_id);
3638 if (atio->u.isp2x.status !=
3639 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3640 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3641 "qla_target(%d): ATIO with error "
3642 "status %x received\n", vha->vp_idx,
3643 le16_to_cpu(atio->u.isp2x.status));
3644 break;
3645 }
3646 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3647 "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3648 atio->u.isp2x.cdb[0], (unsigned long
3649 int)sizeof(atio->u.isp2x.cdb));
3650
3651 rc = qlt_handle_cmd_for_atio(vha, atio);
3652 if (unlikely(rc != 0)) {
3653 if (rc == -ESRCH) {
3654 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3655 qlt_send_busy(vha, atio, 0);
3656 #else
3657 qlt_send_term_exchange(vha, NULL, atio, 1);
3658 #endif
3659 } else {
3660 if (tgt->tgt_stop) {
3661 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3662 "qla_target: Unable to send "
3663 "command to target, sending TERM "
3664 "EXCHANGE for rsp\n");
3665 qlt_send_term_exchange(vha, NULL,
3666 atio, 1);
3667 } else {
3668 ql_dbg(ql_dbg_tgt, vha, 0xe060,
3669 "qla_target(%d): Unable to send "
3670 "command to target, sending BUSY "
3671 "status\n", vha->vp_idx);
3672 qlt_send_busy(vha, atio, 0);
3673 }
3674 }
3675 }
3676 }
3677 break;
3678
3679 case CONTINUE_TGT_IO_TYPE:
3680 {
3681 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3682 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3683 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3684 qlt_do_ctio_completion(vha, entry->handle,
3685 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3686 entry);
3687 break;
3688 }
3689
3690 case CTIO_A64_TYPE:
3691 {
3692 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3693 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3694 vha->vp_idx);
3695 qlt_do_ctio_completion(vha, entry->handle,
3696 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3697 entry);
3698 break;
3699 }
3700
3701 case IMMED_NOTIFY_TYPE:
3702 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3703 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3704 break;
3705
3706 case NOTIFY_ACK_TYPE:
3707 if (tgt->notify_ack_expected > 0) {
3708 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3709 ql_dbg(ql_dbg_tgt, vha, 0xe036,
3710 "NOTIFY_ACK seq %08x status %x\n",
3711 le16_to_cpu(entry->u.isp2x.seq_id),
3712 le16_to_cpu(entry->u.isp2x.status));
3713 tgt->notify_ack_expected--;
3714 if (entry->u.isp2x.status !=
3715 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3716 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3717 "qla_target(%d): NOTIFY_ACK "
3718 "failed %x\n", vha->vp_idx,
3719 le16_to_cpu(entry->u.isp2x.status));
3720 }
3721 } else {
3722 ql_dbg(ql_dbg_tgt, vha, 0xe062,
3723 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3724 vha->vp_idx);
3725 }
3726 break;
3727
3728 case ABTS_RECV_24XX:
3729 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3730 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3731 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3732 break;
3733
3734 case ABTS_RESP_24XX:
3735 if (tgt->abts_resp_expected > 0) {
3736 struct abts_resp_from_24xx_fw *entry =
3737 (struct abts_resp_from_24xx_fw *)pkt;
3738 ql_dbg(ql_dbg_tgt, vha, 0xe038,
3739 "ABTS_RESP_24XX: compl_status %x\n",
3740 entry->compl_status);
3741 tgt->abts_resp_expected--;
3742 if (le16_to_cpu(entry->compl_status) !=
3743 ABTS_RESP_COMPL_SUCCESS) {
3744 if ((entry->error_subcode1 == 0x1E) &&
3745 (entry->error_subcode2 == 0)) {
3746 /*
3747 * We've got a race here: aborted
3748 * exchange not terminated, i.e.
3749 * response for the aborted command was
3750 * sent between the abort request was
3751 * received and processed.
3752 * Unfortunately, the firmware has a
3753 * silly requirement that all aborted
3754 * exchanges must be explicitely
3755 * terminated, otherwise it refuses to
3756 * send responses for the abort
3757 * requests. So, we have to
3758 * (re)terminate the exchange and retry
3759 * the abort response.
3760 */
3761 qlt_24xx_retry_term_exchange(vha,
3762 entry);
3763 } else
3764 ql_dbg(ql_dbg_tgt, vha, 0xe063,
3765 "qla_target(%d): ABTS_RESP_24XX "
3766 "failed %x (subcode %x:%x)",
3767 vha->vp_idx, entry->compl_status,
3768 entry->error_subcode1,
3769 entry->error_subcode2);
3770 }
3771 } else {
3772 ql_dbg(ql_dbg_tgt, vha, 0xe064,
3773 "qla_target(%d): Unexpected ABTS_RESP_24XX "
3774 "received\n", vha->vp_idx);
3775 }
3776 break;
3777
3778 default:
3779 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3780 "qla_target(%d): Received unknown response pkt "
3781 "type %x\n", vha->vp_idx, pkt->entry_type);
3782 break;
3783 }
3784
3785 tgt->irq_cmd_count--;
3786 }
3787
3788 /*
3789 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3790 */
3791 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3792 uint16_t *mailbox)
3793 {
3794 struct qla_hw_data *ha = vha->hw;
3795 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3796 int login_code;
3797
3798 ql_dbg(ql_dbg_tgt, vha, 0xe039,
3799 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3800 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3801 ha->operating_mode, ha->current_topology);
3802
3803 if (!ha->tgt.tgt_ops)
3804 return;
3805
3806 if (unlikely(tgt == NULL)) {
3807 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3808 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3809 return;
3810 }
3811
3812 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3813 IS_QLA2100(ha))
3814 return;
3815 /*
3816 * In tgt_stop mode we also should allow all requests to pass.
3817 * Otherwise, some commands can stuck.
3818 */
3819
3820 tgt->irq_cmd_count++;
3821
3822 switch (code) {
3823 case MBA_RESET: /* Reset */
3824 case MBA_SYSTEM_ERR: /* System Error */
3825 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
3826 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
3827 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3828 "qla_target(%d): System error async event %#x "
3829 "occurred", vha->vp_idx, code);
3830 break;
3831 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
3832 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3833 break;
3834
3835 case MBA_LOOP_UP:
3836 {
3837 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3838 "qla_target(%d): Async LOOP_UP occurred "
3839 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3840 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3841 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3842 if (tgt->link_reinit_iocb_pending) {
3843 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3844 0, 0, 0, 0, 0, 0);
3845 tgt->link_reinit_iocb_pending = 0;
3846 }
3847 break;
3848 }
3849
3850 case MBA_LIP_OCCURRED:
3851 case MBA_LOOP_DOWN:
3852 case MBA_LIP_RESET:
3853 case MBA_RSCN_UPDATE:
3854 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
3855 "qla_target(%d): Async event %#x occurred "
3856 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3857 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3858 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3859 break;
3860
3861 case MBA_PORT_UPDATE:
3862 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
3863 "qla_target(%d): Port update async event %#x "
3864 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
3865 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3866 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3867 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3868
3869 login_code = le16_to_cpu(mailbox[2]);
3870 if (login_code == 0x4)
3871 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
3872 "Async MB 2: Got PLOGI Complete\n");
3873 else if (login_code == 0x7)
3874 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
3875 "Async MB 2: Port Logged Out\n");
3876 break;
3877
3878 default:
3879 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
3880 "qla_target(%d): Async event %#x occurred: "
3881 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3882 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3883 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3884 break;
3885 }
3886
3887 tgt->irq_cmd_count--;
3888 }
3889
3890 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
3891 uint16_t loop_id)
3892 {
3893 fc_port_t *fcport;
3894 int rc;
3895
3896 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
3897 if (!fcport) {
3898 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
3899 "qla_target(%d): Allocation of tmp FC port failed",
3900 vha->vp_idx);
3901 return NULL;
3902 }
3903
3904 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
3905
3906 fcport->loop_id = loop_id;
3907
3908 rc = qla2x00_get_port_database(vha, fcport, 0);
3909 if (rc != QLA_SUCCESS) {
3910 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
3911 "qla_target(%d): Failed to retrieve fcport "
3912 "information -- get_port_database() returned %x "
3913 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
3914 kfree(fcport);
3915 return NULL;
3916 }
3917
3918 return fcport;
3919 }
3920
3921 /* Must be called under tgt_mutex */
3922 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
3923 uint8_t *s_id)
3924 {
3925 struct qla_tgt_sess *sess = NULL;
3926 fc_port_t *fcport = NULL;
3927 int rc, global_resets;
3928 uint16_t loop_id = 0;
3929
3930 retry:
3931 global_resets =
3932 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
3933
3934 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
3935 if (rc != 0) {
3936 if ((s_id[0] == 0xFF) &&
3937 (s_id[1] == 0xFC)) {
3938 /*
3939 * This is Domain Controller, so it should be
3940 * OK to drop SCSI commands from it.
3941 */
3942 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
3943 "Unable to find initiator with S_ID %x:%x:%x",
3944 s_id[0], s_id[1], s_id[2]);
3945 } else
3946 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
3947 "qla_target(%d): Unable to find "
3948 "initiator with S_ID %x:%x:%x",
3949 vha->vp_idx, s_id[0], s_id[1],
3950 s_id[2]);
3951 return NULL;
3952 }
3953
3954 fcport = qlt_get_port_database(vha, loop_id);
3955 if (!fcport)
3956 return NULL;
3957
3958 if (global_resets !=
3959 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
3960 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
3961 "qla_target(%d): global reset during session discovery "
3962 "(counter was %d, new %d), retrying", vha->vp_idx,
3963 global_resets,
3964 atomic_read(&vha->vha_tgt.
3965 qla_tgt->tgt_global_resets_count));
3966 goto retry;
3967 }
3968
3969 sess = qlt_create_sess(vha, fcport, true);
3970
3971 kfree(fcport);
3972 return sess;
3973 }
3974
3975 static void qlt_abort_work(struct qla_tgt *tgt,
3976 struct qla_tgt_sess_work_param *prm)
3977 {
3978 struct scsi_qla_host *vha = tgt->vha;
3979 struct qla_hw_data *ha = vha->hw;
3980 struct qla_tgt_sess *sess = NULL;
3981 unsigned long flags;
3982 uint32_t be_s_id;
3983 uint8_t s_id[3];
3984 int rc;
3985
3986 spin_lock_irqsave(&ha->hardware_lock, flags);
3987
3988 if (tgt->tgt_stop)
3989 goto out_term;
3990
3991 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
3992 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
3993 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
3994
3995 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3996 (unsigned char *)&be_s_id);
3997 if (!sess) {
3998 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3999
4000 mutex_lock(&vha->vha_tgt.tgt_mutex);
4001 sess = qlt_make_local_sess(vha, s_id);
4002 /* sess has got an extra creation ref */
4003 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4004
4005 spin_lock_irqsave(&ha->hardware_lock, flags);
4006 if (!sess)
4007 goto out_term;
4008 } else {
4009 kref_get(&sess->se_sess->sess_kref);
4010 }
4011
4012 if (tgt->tgt_stop)
4013 goto out_term;
4014
4015 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4016 if (rc != 0)
4017 goto out_term;
4018
4019 ha->tgt.tgt_ops->put_sess(sess);
4020 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4021 return;
4022
4023 out_term:
4024 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4025 if (sess)
4026 ha->tgt.tgt_ops->put_sess(sess);
4027 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4028 }
4029
4030 static void qlt_tmr_work(struct qla_tgt *tgt,
4031 struct qla_tgt_sess_work_param *prm)
4032 {
4033 struct atio_from_isp *a = &prm->tm_iocb2;
4034 struct scsi_qla_host *vha = tgt->vha;
4035 struct qla_hw_data *ha = vha->hw;
4036 struct qla_tgt_sess *sess = NULL;
4037 unsigned long flags;
4038 uint8_t *s_id = NULL; /* to hide compiler warnings */
4039 int rc;
4040 uint32_t lun, unpacked_lun;
4041 int lun_size, fn;
4042 void *iocb;
4043
4044 spin_lock_irqsave(&ha->hardware_lock, flags);
4045
4046 if (tgt->tgt_stop)
4047 goto out_term;
4048
4049 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4050 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4051 if (!sess) {
4052 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4053
4054 mutex_lock(&vha->vha_tgt.tgt_mutex);
4055 sess = qlt_make_local_sess(vha, s_id);
4056 /* sess has got an extra creation ref */
4057 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4058
4059 spin_lock_irqsave(&ha->hardware_lock, flags);
4060 if (!sess)
4061 goto out_term;
4062 } else {
4063 kref_get(&sess->se_sess->sess_kref);
4064 }
4065
4066 iocb = a;
4067 lun = a->u.isp24.fcp_cmnd.lun;
4068 lun_size = sizeof(lun);
4069 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4070 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4071
4072 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4073 if (rc != 0)
4074 goto out_term;
4075
4076 ha->tgt.tgt_ops->put_sess(sess);
4077 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4078 return;
4079
4080 out_term:
4081 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4082 if (sess)
4083 ha->tgt.tgt_ops->put_sess(sess);
4084 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4085 }
4086
4087 static void qlt_sess_work_fn(struct work_struct *work)
4088 {
4089 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4090 struct scsi_qla_host *vha = tgt->vha;
4091 unsigned long flags;
4092
4093 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4094
4095 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4096 while (!list_empty(&tgt->sess_works_list)) {
4097 struct qla_tgt_sess_work_param *prm = list_entry(
4098 tgt->sess_works_list.next, typeof(*prm),
4099 sess_works_list_entry);
4100
4101 /*
4102 * This work can be scheduled on several CPUs at time, so we
4103 * must delete the entry to eliminate double processing
4104 */
4105 list_del(&prm->sess_works_list_entry);
4106
4107 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4108
4109 switch (prm->type) {
4110 case QLA_TGT_SESS_WORK_ABORT:
4111 qlt_abort_work(tgt, prm);
4112 break;
4113 case QLA_TGT_SESS_WORK_TM:
4114 qlt_tmr_work(tgt, prm);
4115 break;
4116 default:
4117 BUG_ON(1);
4118 break;
4119 }
4120
4121 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4122
4123 kfree(prm);
4124 }
4125 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4126 }
4127
4128 /* Must be called under tgt_host_action_mutex */
4129 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4130 {
4131 struct qla_tgt *tgt;
4132
4133 if (!QLA_TGT_MODE_ENABLED())
4134 return 0;
4135
4136 if (!IS_TGT_MODE_CAPABLE(ha)) {
4137 ql_log(ql_log_warn, base_vha, 0xe070,
4138 "This adapter does not support target mode.\n");
4139 return 0;
4140 }
4141
4142 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4143 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
4144
4145 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
4146
4147 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4148 if (!tgt) {
4149 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4150 "Unable to allocate struct qla_tgt\n");
4151 return -ENOMEM;
4152 }
4153
4154 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4155 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4156
4157 tgt->ha = ha;
4158 tgt->vha = base_vha;
4159 init_waitqueue_head(&tgt->waitQ);
4160 INIT_LIST_HEAD(&tgt->sess_list);
4161 INIT_LIST_HEAD(&tgt->del_sess_list);
4162 INIT_DELAYED_WORK(&tgt->sess_del_work,
4163 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4164 spin_lock_init(&tgt->sess_work_lock);
4165 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4166 INIT_LIST_HEAD(&tgt->sess_works_list);
4167 spin_lock_init(&tgt->srr_lock);
4168 INIT_LIST_HEAD(&tgt->srr_ctio_list);
4169 INIT_LIST_HEAD(&tgt->srr_imm_list);
4170 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4171 atomic_set(&tgt->tgt_global_resets_count, 0);
4172
4173 base_vha->vha_tgt.qla_tgt = tgt;
4174
4175 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4176 "qla_target(%d): using 64 Bit PCI addressing",
4177 base_vha->vp_idx);
4178 tgt->tgt_enable_64bit_addr = 1;
4179 /* 3 is reserved */
4180 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4181 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4182 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4183
4184 mutex_lock(&qla_tgt_mutex);
4185 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4186 mutex_unlock(&qla_tgt_mutex);
4187
4188 return 0;
4189 }
4190
4191 /* Must be called under tgt_host_action_mutex */
4192 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4193 {
4194 if (!vha->vha_tgt.qla_tgt)
4195 return 0;
4196
4197 mutex_lock(&qla_tgt_mutex);
4198 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
4199 mutex_unlock(&qla_tgt_mutex);
4200
4201 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4202 vha->host_no, ha);
4203 qlt_release(vha->vha_tgt.qla_tgt);
4204
4205 return 0;
4206 }
4207
4208 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4209 unsigned char *b)
4210 {
4211 int i;
4212
4213 pr_debug("qla2xxx HW vha->node_name: ");
4214 for (i = 0; i < WWN_SIZE; i++)
4215 pr_debug("%02x ", vha->node_name[i]);
4216 pr_debug("\n");
4217 pr_debug("qla2xxx HW vha->port_name: ");
4218 for (i = 0; i < WWN_SIZE; i++)
4219 pr_debug("%02x ", vha->port_name[i]);
4220 pr_debug("\n");
4221
4222 pr_debug("qla2xxx passed configfs WWPN: ");
4223 put_unaligned_be64(wwpn, b);
4224 for (i = 0; i < WWN_SIZE; i++)
4225 pr_debug("%02x ", b[i]);
4226 pr_debug("\n");
4227 }
4228
4229 /**
4230 * qla_tgt_lport_register - register lport with external module
4231 *
4232 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4233 * @wwpn: Passwd FC target WWPN
4234 * @callback: lport initialization callback for tcm_qla2xxx code
4235 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4236 */
4237 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
4238 u64 npiv_wwpn, u64 npiv_wwnn,
4239 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
4240 {
4241 struct qla_tgt *tgt;
4242 struct scsi_qla_host *vha;
4243 struct qla_hw_data *ha;
4244 struct Scsi_Host *host;
4245 unsigned long flags;
4246 int rc;
4247 u8 b[WWN_SIZE];
4248
4249 mutex_lock(&qla_tgt_mutex);
4250 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4251 vha = tgt->vha;
4252 ha = vha->hw;
4253
4254 host = vha->host;
4255 if (!host)
4256 continue;
4257
4258 if (!(host->hostt->supported_mode & MODE_TARGET))
4259 continue;
4260
4261 spin_lock_irqsave(&ha->hardware_lock, flags);
4262 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
4263 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4264 host->host_no);
4265 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4266 continue;
4267 }
4268 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4269
4270 if (!scsi_host_get(host)) {
4271 ql_dbg(ql_dbg_tgt, vha, 0xe068,
4272 "Unable to scsi_host_get() for"
4273 " qla2xxx scsi_host\n");
4274 continue;
4275 }
4276 qlt_lport_dump(vha, phys_wwpn, b);
4277
4278 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4279 scsi_host_put(host);
4280 continue;
4281 }
4282 mutex_unlock(&qla_tgt_mutex);
4283
4284 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
4285 if (rc != 0)
4286 scsi_host_put(host);
4287
4288 return rc;
4289 }
4290 mutex_unlock(&qla_tgt_mutex);
4291
4292 return -ENODEV;
4293 }
4294 EXPORT_SYMBOL(qlt_lport_register);
4295
4296 /**
4297 * qla_tgt_lport_deregister - Degister lport
4298 *
4299 * @vha: Registered scsi_qla_host pointer
4300 */
4301 void qlt_lport_deregister(struct scsi_qla_host *vha)
4302 {
4303 struct qla_hw_data *ha = vha->hw;
4304 struct Scsi_Host *sh = vha->host;
4305 /*
4306 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4307 */
4308 vha->vha_tgt.target_lport_ptr = NULL;
4309 ha->tgt.tgt_ops = NULL;
4310 /*
4311 * Release the Scsi_Host reference for the underlying qla2xxx host
4312 */
4313 scsi_host_put(sh);
4314 }
4315 EXPORT_SYMBOL(qlt_lport_deregister);
4316
4317 /* Must be called under HW lock */
4318 void qlt_set_mode(struct scsi_qla_host *vha)
4319 {
4320 struct qla_hw_data *ha = vha->hw;
4321
4322 switch (ql2x_ini_mode) {
4323 case QLA2XXX_INI_MODE_DISABLED:
4324 case QLA2XXX_INI_MODE_EXCLUSIVE:
4325 vha->host->active_mode = MODE_TARGET;
4326 break;
4327 case QLA2XXX_INI_MODE_ENABLED:
4328 vha->host->active_mode |= MODE_TARGET;
4329 break;
4330 default:
4331 break;
4332 }
4333
4334 if (ha->tgt.ini_mode_force_reverse)
4335 qla_reverse_ini_mode(vha);
4336 }
4337
4338 /* Must be called under HW lock */
4339 void qlt_clear_mode(struct scsi_qla_host *vha)
4340 {
4341 struct qla_hw_data *ha = vha->hw;
4342
4343 switch (ql2x_ini_mode) {
4344 case QLA2XXX_INI_MODE_DISABLED:
4345 vha->host->active_mode = MODE_UNKNOWN;
4346 break;
4347 case QLA2XXX_INI_MODE_EXCLUSIVE:
4348 vha->host->active_mode = MODE_INITIATOR;
4349 break;
4350 case QLA2XXX_INI_MODE_ENABLED:
4351 vha->host->active_mode &= ~MODE_TARGET;
4352 break;
4353 default:
4354 break;
4355 }
4356
4357 if (ha->tgt.ini_mode_force_reverse)
4358 qla_reverse_ini_mode(vha);
4359 }
4360
4361 /*
4362 * qla_tgt_enable_vha - NO LOCK HELD
4363 *
4364 * host_reset, bring up w/ Target Mode Enabled
4365 */
4366 void
4367 qlt_enable_vha(struct scsi_qla_host *vha)
4368 {
4369 struct qla_hw_data *ha = vha->hw;
4370 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4371 unsigned long flags;
4372 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
4373
4374 if (!tgt) {
4375 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4376 "Unable to locate qla_tgt pointer from"
4377 " struct qla_hw_data\n");
4378 dump_stack();
4379 return;
4380 }
4381
4382 spin_lock_irqsave(&ha->hardware_lock, flags);
4383 tgt->tgt_stopped = 0;
4384 qlt_set_mode(vha);
4385 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4386
4387 if (vha->vp_idx) {
4388 qla24xx_disable_vp(vha);
4389 qla24xx_enable_vp(vha);
4390 } else {
4391 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
4392 qla2xxx_wake_dpc(base_vha);
4393 qla2x00_wait_for_hba_online(base_vha);
4394 }
4395 }
4396 EXPORT_SYMBOL(qlt_enable_vha);
4397
4398 /*
4399 * qla_tgt_disable_vha - NO LOCK HELD
4400 *
4401 * Disable Target Mode and reset the adapter
4402 */
4403 void
4404 qlt_disable_vha(struct scsi_qla_host *vha)
4405 {
4406 struct qla_hw_data *ha = vha->hw;
4407 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4408 unsigned long flags;
4409
4410 if (!tgt) {
4411 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4412 "Unable to locate qla_tgt pointer from"
4413 " struct qla_hw_data\n");
4414 dump_stack();
4415 return;
4416 }
4417
4418 spin_lock_irqsave(&ha->hardware_lock, flags);
4419 qlt_clear_mode(vha);
4420 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4421
4422 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4423 qla2xxx_wake_dpc(vha);
4424 qla2x00_wait_for_hba_online(vha);
4425 }
4426
4427 /*
4428 * Called from qla_init.c:qla24xx_vport_create() contex to setup
4429 * the target mode specific struct scsi_qla_host and struct qla_hw_data
4430 * members.
4431 */
4432 void
4433 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4434 {
4435 if (!qla_tgt_mode_enabled(vha))
4436 return;
4437
4438 vha->vha_tgt.qla_tgt = NULL;
4439
4440 mutex_init(&vha->vha_tgt.tgt_mutex);
4441 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
4442
4443 qlt_clear_mode(vha);
4444
4445 /*
4446 * NOTE: Currently the value is kept the same for <24xx and
4447 * >=24xx ISPs. If it is necessary to change it,
4448 * the check should be added for specific ISPs,
4449 * assigning the value appropriately.
4450 */
4451 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4452
4453 qlt_add_target(ha, vha);
4454 }
4455
4456 void
4457 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4458 {
4459 /*
4460 * FC-4 Feature bit 0 indicates target functionality to the name server.
4461 */
4462 if (qla_tgt_mode_enabled(vha)) {
4463 if (qla_ini_mode_enabled(vha))
4464 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4465 else
4466 ct_req->req.rff_id.fc4_feature = BIT_0;
4467 } else if (qla_ini_mode_enabled(vha)) {
4468 ct_req->req.rff_id.fc4_feature = BIT_1;
4469 }
4470 }
4471
4472 /*
4473 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4474 * @ha: HA context
4475 *
4476 * Beginning of ATIO ring has initialization control block already built
4477 * by nvram config routine.
4478 *
4479 * Returns 0 on success.
4480 */
4481 void
4482 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4483 {
4484 struct qla_hw_data *ha = vha->hw;
4485 uint16_t cnt;
4486 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4487
4488 if (!qla_tgt_mode_enabled(vha))
4489 return;
4490
4491 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4492 pkt->u.raw.signature = ATIO_PROCESSED;
4493 pkt++;
4494 }
4495
4496 }
4497
4498 /*
4499 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4500 * @ha: SCSI driver HA context
4501 */
4502 void
4503 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4504 {
4505 struct qla_hw_data *ha = vha->hw;
4506 struct atio_from_isp *pkt;
4507 int cnt, i;
4508
4509 if (!vha->flags.online)
4510 return;
4511
4512 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4513 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4514 cnt = pkt->u.raw.entry_count;
4515
4516 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4517
4518 for (i = 0; i < cnt; i++) {
4519 ha->tgt.atio_ring_index++;
4520 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4521 ha->tgt.atio_ring_index = 0;
4522 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4523 } else
4524 ha->tgt.atio_ring_ptr++;
4525
4526 pkt->u.raw.signature = ATIO_PROCESSED;
4527 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4528 }
4529 wmb();
4530 }
4531
4532 /* Adjust ring index */
4533 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
4534 }
4535
4536 void
4537 qlt_24xx_config_rings(struct scsi_qla_host *vha)
4538 {
4539 struct qla_hw_data *ha = vha->hw;
4540 if (!QLA_TGT_MODE_ENABLED())
4541 return;
4542
4543 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4544 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4545 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4546
4547 if (IS_ATIO_MSIX_CAPABLE(ha)) {
4548 struct qla_msix_entry *msix = &ha->msix_entries[2];
4549 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4550
4551 icb->msix_atio = cpu_to_le16(msix->entry);
4552 ql_dbg(ql_dbg_init, vha, 0xf072,
4553 "Registering ICB vector 0x%x for atio que.\n",
4554 msix->entry);
4555 }
4556 }
4557
4558 void
4559 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4560 {
4561 struct qla_hw_data *ha = vha->hw;
4562
4563 if (qla_tgt_mode_enabled(vha)) {
4564 if (!ha->tgt.saved_set) {
4565 /* We save only once */
4566 ha->tgt.saved_exchange_count = nv->exchange_count;
4567 ha->tgt.saved_firmware_options_1 =
4568 nv->firmware_options_1;
4569 ha->tgt.saved_firmware_options_2 =
4570 nv->firmware_options_2;
4571 ha->tgt.saved_firmware_options_3 =
4572 nv->firmware_options_3;
4573 ha->tgt.saved_set = 1;
4574 }
4575
4576 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4577
4578 /* Enable target mode */
4579 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4580
4581 /* Disable ini mode, if requested */
4582 if (!qla_ini_mode_enabled(vha))
4583 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4584
4585 /* Disable Full Login after LIP */
4586 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4587 /* Enable initial LIP */
4588 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4589 /* Enable FC tapes support */
4590 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4591 /* Disable Full Login after LIP */
4592 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4593 /* Enable target PRLI control */
4594 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4595 } else {
4596 if (ha->tgt.saved_set) {
4597 nv->exchange_count = ha->tgt.saved_exchange_count;
4598 nv->firmware_options_1 =
4599 ha->tgt.saved_firmware_options_1;
4600 nv->firmware_options_2 =
4601 ha->tgt.saved_firmware_options_2;
4602 nv->firmware_options_3 =
4603 ha->tgt.saved_firmware_options_3;
4604 }
4605 return;
4606 }
4607
4608 /* out-of-order frames reassembly */
4609 nv->firmware_options_3 |= BIT_6|BIT_9;
4610
4611 if (ha->tgt.enable_class_2) {
4612 if (vha->flags.init_done)
4613 fc_host_supported_classes(vha->host) =
4614 FC_COS_CLASS2 | FC_COS_CLASS3;
4615
4616 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4617 } else {
4618 if (vha->flags.init_done)
4619 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4620
4621 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4622 }
4623 }
4624
4625 void
4626 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4627 struct init_cb_24xx *icb)
4628 {
4629 struct qla_hw_data *ha = vha->hw;
4630
4631 if (ha->tgt.node_name_set) {
4632 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4633 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4634 }
4635 }
4636
4637 void
4638 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4639 {
4640 struct qla_hw_data *ha = vha->hw;
4641
4642 if (!QLA_TGT_MODE_ENABLED())
4643 return;
4644
4645 if (qla_tgt_mode_enabled(vha)) {
4646 if (!ha->tgt.saved_set) {
4647 /* We save only once */
4648 ha->tgt.saved_exchange_count = nv->exchange_count;
4649 ha->tgt.saved_firmware_options_1 =
4650 nv->firmware_options_1;
4651 ha->tgt.saved_firmware_options_2 =
4652 nv->firmware_options_2;
4653 ha->tgt.saved_firmware_options_3 =
4654 nv->firmware_options_3;
4655 ha->tgt.saved_set = 1;
4656 }
4657
4658 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4659
4660 /* Enable target mode */
4661 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4662
4663 /* Disable ini mode, if requested */
4664 if (!qla_ini_mode_enabled(vha))
4665 nv->firmware_options_1 |=
4666 __constant_cpu_to_le32(BIT_5);
4667
4668 /* Disable Full Login after LIP */
4669 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4670 /* Enable initial LIP */
4671 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4672 /* Enable FC tapes support */
4673 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4674 /* Disable Full Login after LIP */
4675 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4676 /* Enable target PRLI control */
4677 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4678 } else {
4679 if (ha->tgt.saved_set) {
4680 nv->exchange_count = ha->tgt.saved_exchange_count;
4681 nv->firmware_options_1 =
4682 ha->tgt.saved_firmware_options_1;
4683 nv->firmware_options_2 =
4684 ha->tgt.saved_firmware_options_2;
4685 nv->firmware_options_3 =
4686 ha->tgt.saved_firmware_options_3;
4687 }
4688 return;
4689 }
4690
4691 /* out-of-order frames reassembly */
4692 nv->firmware_options_3 |= BIT_6|BIT_9;
4693
4694 if (ha->tgt.enable_class_2) {
4695 if (vha->flags.init_done)
4696 fc_host_supported_classes(vha->host) =
4697 FC_COS_CLASS2 | FC_COS_CLASS3;
4698
4699 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4700 } else {
4701 if (vha->flags.init_done)
4702 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4703
4704 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4705 }
4706 }
4707
4708 void
4709 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4710 struct init_cb_81xx *icb)
4711 {
4712 struct qla_hw_data *ha = vha->hw;
4713
4714 if (!QLA_TGT_MODE_ENABLED())
4715 return;
4716
4717 if (ha->tgt.node_name_set) {
4718 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4719 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4720 }
4721 }
4722
4723 void
4724 qlt_83xx_iospace_config(struct qla_hw_data *ha)
4725 {
4726 if (!QLA_TGT_MODE_ENABLED())
4727 return;
4728
4729 ha->msix_count += 1; /* For ATIO Q */
4730 }
4731
4732 int
4733 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4734 struct sts_entry_24xx *pkt)
4735 {
4736 switch (pkt->entry_type) {
4737 case ABTS_RECV_24XX:
4738 case ABTS_RESP_24XX:
4739 case CTIO_TYPE7:
4740 case NOTIFY_ACK_TYPE:
4741 return 1;
4742 default:
4743 return 0;
4744 }
4745 }
4746
4747 void
4748 qlt_modify_vp_config(struct scsi_qla_host *vha,
4749 struct vp_config_entry_24xx *vpmod)
4750 {
4751 if (qla_tgt_mode_enabled(vha))
4752 vpmod->options_idx1 &= ~BIT_5;
4753 /* Disable ini mode, if requested */
4754 if (!qla_ini_mode_enabled(vha))
4755 vpmod->options_idx1 &= ~BIT_4;
4756 }
4757
4758 void
4759 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4760 {
4761 if (!QLA_TGT_MODE_ENABLED())
4762 return;
4763
4764 if (ha->mqenable || IS_QLA83XX(ha)) {
4765 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4766 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4767 } else {
4768 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4769 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4770 }
4771
4772 mutex_init(&base_vha->vha_tgt.tgt_mutex);
4773 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
4774 qlt_clear_mode(base_vha);
4775 }
4776
4777 irqreturn_t
4778 qla83xx_msix_atio_q(int irq, void *dev_id)
4779 {
4780 struct rsp_que *rsp;
4781 scsi_qla_host_t *vha;
4782 struct qla_hw_data *ha;
4783 unsigned long flags;
4784
4785 rsp = (struct rsp_que *) dev_id;
4786 ha = rsp->hw;
4787 vha = pci_get_drvdata(ha->pdev);
4788
4789 spin_lock_irqsave(&ha->hardware_lock, flags);
4790
4791 qlt_24xx_process_atio_queue(vha);
4792 qla24xx_process_response_queue(vha, rsp);
4793
4794 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4795
4796 return IRQ_HANDLED;
4797 }
4798
4799 int
4800 qlt_mem_alloc(struct qla_hw_data *ha)
4801 {
4802 if (!QLA_TGT_MODE_ENABLED())
4803 return 0;
4804
4805 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4806 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4807 if (!ha->tgt.tgt_vp_map)
4808 return -ENOMEM;
4809
4810 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4811 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4812 &ha->tgt.atio_dma, GFP_KERNEL);
4813 if (!ha->tgt.atio_ring) {
4814 kfree(ha->tgt.tgt_vp_map);
4815 return -ENOMEM;
4816 }
4817 return 0;
4818 }
4819
4820 void
4821 qlt_mem_free(struct qla_hw_data *ha)
4822 {
4823 if (!QLA_TGT_MODE_ENABLED())
4824 return;
4825
4826 if (ha->tgt.atio_ring) {
4827 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4828 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4829 ha->tgt.atio_dma);
4830 }
4831 kfree(ha->tgt.tgt_vp_map);
4832 }
4833
4834 /* vport_slock to be held by the caller */
4835 void
4836 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4837 {
4838 if (!QLA_TGT_MODE_ENABLED())
4839 return;
4840
4841 switch (cmd) {
4842 case SET_VP_IDX:
4843 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4844 break;
4845 case SET_AL_PA:
4846 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4847 break;
4848 case RESET_VP_IDX:
4849 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4850 break;
4851 case RESET_AL_PA:
4852 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4853 break;
4854 }
4855 }
4856
4857 static int __init qlt_parse_ini_mode(void)
4858 {
4859 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4860 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4861 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4862 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4863 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4864 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4865 else
4866 return false;
4867
4868 return true;
4869 }
4870
4871 int __init qlt_init(void)
4872 {
4873 int ret;
4874
4875 if (!qlt_parse_ini_mode()) {
4876 ql_log(ql_log_fatal, NULL, 0xe06b,
4877 "qlt_parse_ini_mode() failed\n");
4878 return -EINVAL;
4879 }
4880
4881 if (!QLA_TGT_MODE_ENABLED())
4882 return 0;
4883
4884 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4885 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4886 NULL);
4887 if (!qla_tgt_cmd_cachep) {
4888 ql_log(ql_log_fatal, NULL, 0xe06c,
4889 "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4890 return -ENOMEM;
4891 }
4892
4893 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4894 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4895 qla_tgt_mgmt_cmd), 0, NULL);
4896 if (!qla_tgt_mgmt_cmd_cachep) {
4897 ql_log(ql_log_fatal, NULL, 0xe06d,
4898 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4899 ret = -ENOMEM;
4900 goto out;
4901 }
4902
4903 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4904 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4905 if (!qla_tgt_mgmt_cmd_mempool) {
4906 ql_log(ql_log_fatal, NULL, 0xe06e,
4907 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4908 ret = -ENOMEM;
4909 goto out_mgmt_cmd_cachep;
4910 }
4911
4912 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4913 if (!qla_tgt_wq) {
4914 ql_log(ql_log_fatal, NULL, 0xe06f,
4915 "alloc_workqueue for qla_tgt_wq failed\n");
4916 ret = -ENOMEM;
4917 goto out_cmd_mempool;
4918 }
4919 /*
4920 * Return 1 to signal that initiator-mode is being disabled
4921 */
4922 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4923
4924 out_cmd_mempool:
4925 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4926 out_mgmt_cmd_cachep:
4927 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4928 out:
4929 kmem_cache_destroy(qla_tgt_cmd_cachep);
4930 return ret;
4931 }
4932
4933 void qlt_exit(void)
4934 {
4935 if (!QLA_TGT_MODE_ENABLED())
4936 return;
4937
4938 destroy_workqueue(qla_tgt_wq);
4939 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4940 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4941 kmem_cache_destroy(qla_tgt_cmd_cachep);
4942 }
Linux with added FPC-III support