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Lynx framebuffers multidomain implementation.
[linux/elbrus.git] / drivers / scsi / qla2xxx / qla_target.c
blob2f264ac79546959da7d74893da569b9de0041348
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 int 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 mutex_lock(&qla_tgt_mutex);
800 if (!vha->fc_vport) {
801 struct Scsi_Host *sh = vha->host;
802 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
803 bool npiv_vports;
804
805 spin_lock_irqsave(sh->host_lock, flags);
806 npiv_vports = (fc_host->npiv_vports_inuse);
807 spin_unlock_irqrestore(sh->host_lock, flags);
808
809 if (npiv_vports) {
810 mutex_unlock(&qla_tgt_mutex);
811 return -EPERM;
812 }
813 }
814 if (tgt->tgt_stop || tgt->tgt_stopped) {
815 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
816 "Already in tgt->tgt_stop or tgt_stopped state\n");
817 mutex_unlock(&qla_tgt_mutex);
818 return -EPERM;
819 }
820
821 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
822 vha->host_no, vha);
823 /*
824 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
825 * Lock is needed, because we still can get an incoming packet.
826 */
827 mutex_lock(&vha->vha_tgt.tgt_mutex);
828 spin_lock_irqsave(&ha->hardware_lock, flags);
829 tgt->tgt_stop = 1;
830 qlt_clear_tgt_db(tgt, true);
831 spin_unlock_irqrestore(&ha->hardware_lock, flags);
832 mutex_unlock(&vha->vha_tgt.tgt_mutex);
833 mutex_unlock(&qla_tgt_mutex);
834
835 flush_delayed_work(&tgt->sess_del_work);
836
837 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
838 "Waiting for sess works (tgt %p)", tgt);
839 spin_lock_irqsave(&tgt->sess_work_lock, flags);
840 while (!list_empty(&tgt->sess_works_list)) {
841 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
842 flush_scheduled_work();
843 spin_lock_irqsave(&tgt->sess_work_lock, flags);
844 }
845 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
846
847 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
848 "Waiting for tgt %p: list_empty(sess_list)=%d "
849 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
850 tgt->sess_count);
851
852 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
853
854 /* Big hammer */
855 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
856 qlt_disable_vha(vha);
857
858 /* Wait for sessions to clear out (just in case) */
859 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
860 return 0;
861 }
862 EXPORT_SYMBOL(qlt_stop_phase1);
863
864 /* Called by tcm_qla2xxx configfs code */
865 void qlt_stop_phase2(struct qla_tgt *tgt)
866 {
867 struct qla_hw_data *ha = tgt->ha;
868 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
869 unsigned long flags;
870
871 if (tgt->tgt_stopped) {
872 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
873 "Already in tgt->tgt_stopped state\n");
874 dump_stack();
875 return;
876 }
877
878 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
879 "Waiting for %d IRQ commands to complete (tgt %p)",
880 tgt->irq_cmd_count, tgt);
881
882 mutex_lock(&vha->vha_tgt.tgt_mutex);
883 spin_lock_irqsave(&ha->hardware_lock, flags);
884 while (tgt->irq_cmd_count != 0) {
885 spin_unlock_irqrestore(&ha->hardware_lock, flags);
886 udelay(2);
887 spin_lock_irqsave(&ha->hardware_lock, flags);
888 }
889 tgt->tgt_stop = 0;
890 tgt->tgt_stopped = 1;
891 spin_unlock_irqrestore(&ha->hardware_lock, flags);
892 mutex_unlock(&vha->vha_tgt.tgt_mutex);
893
894 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
895 tgt);
896 }
897 EXPORT_SYMBOL(qlt_stop_phase2);
898
899 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
900 static void qlt_release(struct qla_tgt *tgt)
901 {
902 scsi_qla_host_t *vha = tgt->vha;
903
904 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
905 qlt_stop_phase2(tgt);
906
907 vha->vha_tgt.qla_tgt = NULL;
908
909 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
910 "Release of tgt %p finished\n", tgt);
911
912 kfree(tgt);
913 }
914
915 /* ha->hardware_lock supposed to be held on entry */
916 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
917 const void *param, unsigned int param_size)
918 {
919 struct qla_tgt_sess_work_param *prm;
920 unsigned long flags;
921
922 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
923 if (!prm) {
924 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
925 "qla_target(%d): Unable to create session "
926 "work, command will be refused", 0);
927 return -ENOMEM;
928 }
929
930 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
931 "Scheduling work (type %d, prm %p)"
932 " to find session for param %p (size %d, tgt %p)\n",
933 type, prm, param, param_size, tgt);
934
935 prm->type = type;
936 memcpy(&prm->tm_iocb, param, param_size);
937
938 spin_lock_irqsave(&tgt->sess_work_lock, flags);
939 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
940 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
941
942 schedule_work(&tgt->sess_work);
943
944 return 0;
945 }
946
947 /*
948 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
949 */
950 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
951 struct imm_ntfy_from_isp *ntfy,
952 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
953 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
954 {
955 struct qla_hw_data *ha = vha->hw;
956 request_t *pkt;
957 struct nack_to_isp *nack;
958
959 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
960
961 /* Send marker if required */
962 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
963 return;
964
965 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
966 if (!pkt) {
967 ql_dbg(ql_dbg_tgt, vha, 0xe049,
968 "qla_target(%d): %s failed: unable to allocate "
969 "request packet\n", vha->vp_idx, __func__);
970 return;
971 }
972
973 if (vha->vha_tgt.qla_tgt != NULL)
974 vha->vha_tgt.qla_tgt->notify_ack_expected++;
975
976 pkt->entry_type = NOTIFY_ACK_TYPE;
977 pkt->entry_count = 1;
978
979 nack = (struct nack_to_isp *)pkt;
980 nack->ox_id = ntfy->ox_id;
981
982 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
983 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
984 nack->u.isp24.flags = ntfy->u.isp24.flags &
985 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
986 }
987 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
988 nack->u.isp24.status = ntfy->u.isp24.status;
989 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
990 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
991 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
992 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
993 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
994 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
995 nack->u.isp24.srr_reject_code = srr_reject_code;
996 nack->u.isp24.srr_reject_code_expl = srr_explan;
997 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
998
999 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1000 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1001 vha->vp_idx, nack->u.isp24.status);
1002
1003 qla2x00_start_iocbs(vha, vha->req);
1004 }
1005
1006 /*
1007 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1008 */
1009 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1010 struct abts_recv_from_24xx *abts, uint32_t status,
1011 bool ids_reversed)
1012 {
1013 struct qla_hw_data *ha = vha->hw;
1014 struct abts_resp_to_24xx *resp;
1015 uint32_t f_ctl;
1016 uint8_t *p;
1017
1018 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1019 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1020 ha, abts, status);
1021
1022 /* Send marker if required */
1023 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1024 return;
1025
1026 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1027 if (!resp) {
1028 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1029 "qla_target(%d): %s failed: unable to allocate "
1030 "request packet", vha->vp_idx, __func__);
1031 return;
1032 }
1033
1034 resp->entry_type = ABTS_RESP_24XX;
1035 resp->entry_count = 1;
1036 resp->nport_handle = abts->nport_handle;
1037 resp->vp_index = vha->vp_idx;
1038 resp->sof_type = abts->sof_type;
1039 resp->exchange_address = abts->exchange_address;
1040 resp->fcp_hdr_le = abts->fcp_hdr_le;
1041 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1042 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1043 F_CTL_SEQ_INITIATIVE);
1044 p = (uint8_t *)&f_ctl;
1045 resp->fcp_hdr_le.f_ctl[0] = *p++;
1046 resp->fcp_hdr_le.f_ctl[1] = *p++;
1047 resp->fcp_hdr_le.f_ctl[2] = *p;
1048 if (ids_reversed) {
1049 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1050 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1051 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1052 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1053 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1054 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1055 } else {
1056 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1057 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1058 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1059 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1060 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1061 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1062 }
1063 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1064 if (status == FCP_TMF_CMPL) {
1065 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1066 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1067 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1068 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1069 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1070 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1071 } else {
1072 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1073 resp->payload.ba_rjt.reason_code =
1074 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1075 /* Other bytes are zero */
1076 }
1077
1078 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1079
1080 qla2x00_start_iocbs(vha, vha->req);
1081 }
1082
1083 /*
1084 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1085 */
1086 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1087 struct abts_resp_from_24xx_fw *entry)
1088 {
1089 struct ctio7_to_24xx *ctio;
1090
1091 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1092 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1093 /* Send marker if required */
1094 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1095 return;
1096
1097 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1098 if (ctio == NULL) {
1099 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1100 "qla_target(%d): %s failed: unable to allocate "
1101 "request packet\n", vha->vp_idx, __func__);
1102 return;
1103 }
1104
1105 /*
1106 * We've got on entrance firmware's response on by us generated
1107 * ABTS response. So, in it ID fields are reversed.
1108 */
1109
1110 ctio->entry_type = CTIO_TYPE7;
1111 ctio->entry_count = 1;
1112 ctio->nport_handle = entry->nport_handle;
1113 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1114 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1115 ctio->vp_index = vha->vp_idx;
1116 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1117 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1118 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1119 ctio->exchange_addr = entry->exchange_addr_to_abort;
1120 ctio->u.status1.flags =
1121 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1122 CTIO7_FLAGS_TERMINATE);
1123 ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1124
1125 qla2x00_start_iocbs(vha, vha->req);
1126
1127 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1128 FCP_TMF_CMPL, true);
1129 }
1130
1131 /* ha->hardware_lock supposed to be held on entry */
1132 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1133 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1134 {
1135 struct qla_hw_data *ha = vha->hw;
1136 struct se_session *se_sess = sess->se_sess;
1137 struct qla_tgt_mgmt_cmd *mcmd;
1138 struct se_cmd *se_cmd;
1139 u32 lun = 0;
1140 int rc;
1141 bool found_lun = false;
1142
1143 spin_lock(&se_sess->sess_cmd_lock);
1144 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1145 struct qla_tgt_cmd *cmd =
1146 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1147 if (cmd->tag == abts->exchange_addr_to_abort) {
1148 lun = cmd->unpacked_lun;
1149 found_lun = true;
1150 break;
1151 }
1152 }
1153 spin_unlock(&se_sess->sess_cmd_lock);
1154
1155 if (!found_lun)
1156 return -ENOENT;
1157
1158 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1159 "qla_target(%d): task abort (tag=%d)\n",
1160 vha->vp_idx, abts->exchange_addr_to_abort);
1161
1162 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1163 if (mcmd == NULL) {
1164 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1165 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1166 vha->vp_idx, __func__);
1167 return -ENOMEM;
1168 }
1169 memset(mcmd, 0, sizeof(*mcmd));
1170
1171 mcmd->sess = sess;
1172 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1173
1174 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1175 abts->exchange_addr_to_abort);
1176 if (rc != 0) {
1177 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1178 "qla_target(%d): tgt_ops->handle_tmr()"
1179 " failed: %d", vha->vp_idx, rc);
1180 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1181 return -EFAULT;
1182 }
1183
1184 return 0;
1185 }
1186
1187 /*
1188 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1189 */
1190 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1191 struct abts_recv_from_24xx *abts)
1192 {
1193 struct qla_hw_data *ha = vha->hw;
1194 struct qla_tgt_sess *sess;
1195 uint32_t tag = abts->exchange_addr_to_abort;
1196 uint8_t s_id[3];
1197 int rc;
1198
1199 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1200 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1201 "qla_target(%d): ABTS: Abort Sequence not "
1202 "supported\n", vha->vp_idx);
1203 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1204 return;
1205 }
1206
1207 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1208 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1209 "qla_target(%d): ABTS: Unknown Exchange "
1210 "Address received\n", vha->vp_idx);
1211 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1212 return;
1213 }
1214
1215 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1216 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1217 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1218 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1219 le32_to_cpu(abts->fcp_hdr_le.parameter));
1220
1221 s_id[0] = abts->fcp_hdr_le.s_id[2];
1222 s_id[1] = abts->fcp_hdr_le.s_id[1];
1223 s_id[2] = abts->fcp_hdr_le.s_id[0];
1224
1225 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1226 if (!sess) {
1227 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1228 "qla_target(%d): task abort for non-existant session\n",
1229 vha->vp_idx);
1230 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1231 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1232 if (rc != 0) {
1233 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1234 false);
1235 }
1236 return;
1237 }
1238
1239 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1240 if (rc != 0) {
1241 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1242 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1243 vha->vp_idx, rc);
1244 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1245 return;
1246 }
1247 }
1248
1249 /*
1250 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1251 */
1252 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1253 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1254 {
1255 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1256 struct ctio7_to_24xx *ctio;
1257
1258 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1259 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1260 ha, atio, resp_code);
1261
1262 /* Send marker if required */
1263 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1264 return;
1265
1266 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1267 if (ctio == NULL) {
1268 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1269 "qla_target(%d): %s failed: unable to allocate "
1270 "request packet\n", ha->vp_idx, __func__);
1271 return;
1272 }
1273
1274 ctio->entry_type = CTIO_TYPE7;
1275 ctio->entry_count = 1;
1276 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1277 ctio->nport_handle = mcmd->sess->loop_id;
1278 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1279 ctio->vp_index = ha->vp_idx;
1280 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1281 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1282 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1283 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1284 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1285 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1286 CTIO7_FLAGS_SEND_STATUS);
1287 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1288 ctio->u.status1.scsi_status =
1289 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1290 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1291 ctio->u.status1.sense_data[0] = resp_code;
1292
1293 qla2x00_start_iocbs(ha, ha->req);
1294 }
1295
1296 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1297 {
1298 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1299 }
1300 EXPORT_SYMBOL(qlt_free_mcmd);
1301
1302 /* callback from target fabric module code */
1303 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1304 {
1305 struct scsi_qla_host *vha = mcmd->sess->vha;
1306 struct qla_hw_data *ha = vha->hw;
1307 unsigned long flags;
1308
1309 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1310 "TM response mcmd (%p) status %#x state %#x",
1311 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1312
1313 spin_lock_irqsave(&ha->hardware_lock, flags);
1314 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1315 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1316 0, 0, 0, 0, 0, 0);
1317 else {
1318 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1319 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1320 mcmd->fc_tm_rsp, false);
1321 else
1322 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1323 mcmd->fc_tm_rsp);
1324 }
1325 /*
1326 * Make the callback for ->free_mcmd() to queue_work() and invoke
1327 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1328 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1329 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1330 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1331 * qlt_xmit_tm_rsp() returns here..
1332 */
1333 ha->tgt.tgt_ops->free_mcmd(mcmd);
1334 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1335 }
1336 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1337
1338 /* No locks */
1339 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1340 {
1341 struct qla_tgt_cmd *cmd = prm->cmd;
1342
1343 BUG_ON(cmd->sg_cnt == 0);
1344
1345 prm->sg = (struct scatterlist *)cmd->sg;
1346 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1347 cmd->sg_cnt, cmd->dma_data_direction);
1348 if (unlikely(prm->seg_cnt == 0))
1349 goto out_err;
1350
1351 prm->cmd->sg_mapped = 1;
1352
1353 /*
1354 * If greater than four sg entries then we need to allocate
1355 * the continuation entries
1356 */
1357 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1358 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1359 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1360
1361 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1362 prm->seg_cnt, prm->req_cnt);
1363 return 0;
1364
1365 out_err:
1366 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1367 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1368 0, prm->cmd->sg_cnt);
1369 return -1;
1370 }
1371
1372 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1373 struct qla_tgt_cmd *cmd)
1374 {
1375 struct qla_hw_data *ha = vha->hw;
1376
1377 BUG_ON(!cmd->sg_mapped);
1378 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1379 cmd->sg_mapped = 0;
1380 }
1381
1382 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1383 uint32_t req_cnt)
1384 {
1385 uint32_t cnt;
1386
1387 if (vha->req->cnt < (req_cnt + 2)) {
1388 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1389
1390 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1391 "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1392 "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1393 vha->req->ring_index, vha->req->cnt, req_cnt);
1394 if (vha->req->ring_index < cnt)
1395 vha->req->cnt = cnt - vha->req->ring_index;
1396 else
1397 vha->req->cnt = vha->req->length -
1398 (vha->req->ring_index - cnt);
1399 }
1400
1401 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1402 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1403 "qla_target(%d): There is no room in the "
1404 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1405 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1406 vha->req->cnt, req_cnt);
1407 return -EAGAIN;
1408 }
1409 vha->req->cnt -= req_cnt;
1410
1411 return 0;
1412 }
1413
1414 /*
1415 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1416 */
1417 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1418 {
1419 /* Adjust ring index. */
1420 vha->req->ring_index++;
1421 if (vha->req->ring_index == vha->req->length) {
1422 vha->req->ring_index = 0;
1423 vha->req->ring_ptr = vha->req->ring;
1424 } else {
1425 vha->req->ring_ptr++;
1426 }
1427 return (cont_entry_t *)vha->req->ring_ptr;
1428 }
1429
1430 /* ha->hardware_lock supposed to be held on entry */
1431 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1432 {
1433 struct qla_hw_data *ha = vha->hw;
1434 uint32_t h;
1435
1436 h = ha->tgt.current_handle;
1437 /* always increment cmd handle */
1438 do {
1439 ++h;
1440 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1441 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1442 if (h == ha->tgt.current_handle) {
1443 ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1444 "qla_target(%d): Ran out of "
1445 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1446 h = QLA_TGT_NULL_HANDLE;
1447 break;
1448 }
1449 } while ((h == QLA_TGT_NULL_HANDLE) ||
1450 (h == QLA_TGT_SKIP_HANDLE) ||
1451 (ha->tgt.cmds[h-1] != NULL));
1452
1453 if (h != QLA_TGT_NULL_HANDLE)
1454 ha->tgt.current_handle = h;
1455
1456 return h;
1457 }
1458
1459 /* ha->hardware_lock supposed to be held on entry */
1460 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1461 struct scsi_qla_host *vha)
1462 {
1463 uint32_t h;
1464 struct ctio7_to_24xx *pkt;
1465 struct qla_hw_data *ha = vha->hw;
1466 struct atio_from_isp *atio = &prm->cmd->atio;
1467
1468 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1469 prm->pkt = pkt;
1470 memset(pkt, 0, sizeof(*pkt));
1471
1472 pkt->entry_type = CTIO_TYPE7;
1473 pkt->entry_count = (uint8_t)prm->req_cnt;
1474 pkt->vp_index = vha->vp_idx;
1475
1476 h = qlt_make_handle(vha);
1477 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1478 /*
1479 * CTIO type 7 from the firmware doesn't provide a way to
1480 * know the initiator's LOOP ID, hence we can't find
1481 * the session and, so, the command.
1482 */
1483 return -EAGAIN;
1484 } else
1485 ha->tgt.cmds[h-1] = prm->cmd;
1486
1487 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1488 pkt->nport_handle = prm->cmd->loop_id;
1489 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1490 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1491 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1492 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1493 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1494 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1495 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1496 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1497
1498 ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1499 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1500 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1501 le16_to_cpu(pkt->u.status0.ox_id));
1502 return 0;
1503 }
1504
1505 /*
1506 * ha->hardware_lock supposed to be held on entry. We have already made sure
1507 * that there is sufficient amount of request entries to not drop it.
1508 */
1509 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1510 struct scsi_qla_host *vha)
1511 {
1512 int cnt;
1513 uint32_t *dword_ptr;
1514 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1515
1516 /* Build continuation packets */
1517 while (prm->seg_cnt > 0) {
1518 cont_a64_entry_t *cont_pkt64 =
1519 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1520
1521 /*
1522 * Make sure that from cont_pkt64 none of
1523 * 64-bit specific fields used for 32-bit
1524 * addressing. Cast to (cont_entry_t *) for
1525 * that.
1526 */
1527
1528 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1529
1530 cont_pkt64->entry_count = 1;
1531 cont_pkt64->sys_define = 0;
1532
1533 if (enable_64bit_addressing) {
1534 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1535 dword_ptr =
1536 (uint32_t *)&cont_pkt64->dseg_0_address;
1537 } else {
1538 cont_pkt64->entry_type = CONTINUE_TYPE;
1539 dword_ptr =
1540 (uint32_t *)&((cont_entry_t *)
1541 cont_pkt64)->dseg_0_address;
1542 }
1543
1544 /* Load continuation entry data segments */
1545 for (cnt = 0;
1546 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1547 cnt++, prm->seg_cnt--) {
1548 *dword_ptr++ =
1549 cpu_to_le32(pci_dma_lo32
1550 (sg_dma_address(prm->sg)));
1551 if (enable_64bit_addressing) {
1552 *dword_ptr++ =
1553 cpu_to_le32(pci_dma_hi32
1554 (sg_dma_address
1555 (prm->sg)));
1556 }
1557 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1558
1559 ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1560 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1561 (long long unsigned int)
1562 pci_dma_hi32(sg_dma_address(prm->sg)),
1563 (long long unsigned int)
1564 pci_dma_lo32(sg_dma_address(prm->sg)),
1565 (int)sg_dma_len(prm->sg));
1566
1567 prm->sg = sg_next(prm->sg);
1568 }
1569 }
1570 }
1571
1572 /*
1573 * ha->hardware_lock supposed to be held on entry. We have already made sure
1574 * that there is sufficient amount of request entries to not drop it.
1575 */
1576 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1577 struct scsi_qla_host *vha)
1578 {
1579 int cnt;
1580 uint32_t *dword_ptr;
1581 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1582 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1583
1584 ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1585 "iocb->scsi_status=%x, iocb->flags=%x\n",
1586 le16_to_cpu(pkt24->u.status0.scsi_status),
1587 le16_to_cpu(pkt24->u.status0.flags));
1588
1589 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1590
1591 /* Setup packet address segment pointer */
1592 dword_ptr = pkt24->u.status0.dseg_0_address;
1593
1594 /* Set total data segment count */
1595 if (prm->seg_cnt)
1596 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1597
1598 if (prm->seg_cnt == 0) {
1599 /* No data transfer */
1600 *dword_ptr++ = 0;
1601 *dword_ptr = 0;
1602 return;
1603 }
1604
1605 /* If scatter gather */
1606 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1607
1608 /* Load command entry data segments */
1609 for (cnt = 0;
1610 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1611 cnt++, prm->seg_cnt--) {
1612 *dword_ptr++ =
1613 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1614 if (enable_64bit_addressing) {
1615 *dword_ptr++ =
1616 cpu_to_le32(pci_dma_hi32(
1617 sg_dma_address(prm->sg)));
1618 }
1619 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1620
1621 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1622 "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1623 (long long unsigned int)pci_dma_hi32(sg_dma_address(
1624 prm->sg)),
1625 (long long unsigned int)pci_dma_lo32(sg_dma_address(
1626 prm->sg)),
1627 (int)sg_dma_len(prm->sg));
1628
1629 prm->sg = sg_next(prm->sg);
1630 }
1631
1632 qlt_load_cont_data_segments(prm, vha);
1633 }
1634
1635 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1636 {
1637 return cmd->bufflen > 0;
1638 }
1639
1640 /*
1641 * Called without ha->hardware_lock held
1642 */
1643 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1644 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1645 uint32_t *full_req_cnt)
1646 {
1647 struct qla_tgt *tgt = cmd->tgt;
1648 struct scsi_qla_host *vha = tgt->vha;
1649 struct qla_hw_data *ha = vha->hw;
1650 struct se_cmd *se_cmd = &cmd->se_cmd;
1651
1652 if (unlikely(cmd->aborted)) {
1653 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1654 "qla_target(%d): terminating exchange "
1655 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1656 se_cmd, cmd->tag);
1657
1658 cmd->state = QLA_TGT_STATE_ABORTED;
1659
1660 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1661
1662 /* !! At this point cmd could be already freed !! */
1663 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1664 }
1665
1666 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1667 vha->vp_idx, cmd->tag);
1668
1669 prm->cmd = cmd;
1670 prm->tgt = tgt;
1671 prm->rq_result = scsi_status;
1672 prm->sense_buffer = &cmd->sense_buffer[0];
1673 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1674 prm->sg = NULL;
1675 prm->seg_cnt = -1;
1676 prm->req_cnt = 1;
1677 prm->add_status_pkt = 0;
1678
1679 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1680 prm->rq_result, xmit_type);
1681
1682 /* Send marker if required */
1683 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1684 return -EFAULT;
1685
1686 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1687
1688 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1689 if (qlt_pci_map_calc_cnt(prm) != 0)
1690 return -EAGAIN;
1691 }
1692
1693 *full_req_cnt = prm->req_cnt;
1694
1695 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1696 prm->residual = se_cmd->residual_count;
1697 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1698 "Residual underflow: %d (tag %d, "
1699 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1700 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1701 cmd->bufflen, prm->rq_result);
1702 prm->rq_result |= SS_RESIDUAL_UNDER;
1703 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1704 prm->residual = se_cmd->residual_count;
1705 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1706 "Residual overflow: %d (tag %d, "
1707 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1708 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1709 cmd->bufflen, prm->rq_result);
1710 prm->rq_result |= SS_RESIDUAL_OVER;
1711 }
1712
1713 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1714 /*
1715 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1716 * ignored in *xmit_response() below
1717 */
1718 if (qlt_has_data(cmd)) {
1719 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1720 (IS_FWI2_CAPABLE(ha) &&
1721 (prm->rq_result != 0))) {
1722 prm->add_status_pkt = 1;
1723 (*full_req_cnt)++;
1724 }
1725 }
1726 }
1727
1728 ql_dbg(ql_dbg_tgt, vha, 0xe016,
1729 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1730 prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1731
1732 return 0;
1733 }
1734
1735 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1736 struct qla_tgt_cmd *cmd, int sending_sense)
1737 {
1738 if (ha->tgt.enable_class_2)
1739 return 0;
1740
1741 if (sending_sense)
1742 return cmd->conf_compl_supported;
1743 else
1744 return ha->tgt.enable_explicit_conf &&
1745 cmd->conf_compl_supported;
1746 }
1747
1748 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1749 /*
1750 * Original taken from the XFS code
1751 */
1752 static unsigned long qlt_srr_random(void)
1753 {
1754 static int Inited;
1755 static unsigned long RandomValue;
1756 static DEFINE_SPINLOCK(lock);
1757 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1758 register long rv;
1759 register long lo;
1760 register long hi;
1761 unsigned long flags;
1762
1763 spin_lock_irqsave(&lock, flags);
1764 if (!Inited) {
1765 RandomValue = jiffies;
1766 Inited = 1;
1767 }
1768 rv = RandomValue;
1769 hi = rv / 127773;
1770 lo = rv % 127773;
1771 rv = 16807 * lo - 2836 * hi;
1772 if (rv <= 0)
1773 rv += 2147483647;
1774 RandomValue = rv;
1775 spin_unlock_irqrestore(&lock, flags);
1776 return rv;
1777 }
1778
1779 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1780 {
1781 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1782 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1783 == 50) {
1784 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1785 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1786 "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1787 }
1788 #endif
1789 /*
1790 * It's currently not possible to simulate SRRs for FCP_WRITE without
1791 * a physical link layer failure, so don't even try here..
1792 */
1793 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1794 return;
1795
1796 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1797 ((qlt_srr_random() % 100) == 20)) {
1798 int i, leave = 0;
1799 unsigned int tot_len = 0;
1800
1801 while (leave == 0)
1802 leave = qlt_srr_random() % cmd->sg_cnt;
1803
1804 for (i = 0; i < leave; i++)
1805 tot_len += cmd->sg[i].length;
1806
1807 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1808 "Cutting cmd %p (tag %d) buffer"
1809 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1810 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1811 cmd->bufflen, cmd->sg_cnt);
1812
1813 cmd->bufflen = tot_len;
1814 cmd->sg_cnt = leave;
1815 }
1816
1817 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1818 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1819
1820 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1821 "Cutting cmd %p (tag %d) buffer head "
1822 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1823 cmd->bufflen);
1824 if (offset == 0)
1825 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1826 else if (qlt_set_data_offset(cmd, offset)) {
1827 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1828 "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1829 }
1830 }
1831 }
1832 #else
1833 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1834 {}
1835 #endif
1836
1837 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1838 struct qla_tgt_prm *prm)
1839 {
1840 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1841 (uint32_t)sizeof(ctio->u.status1.sense_data));
1842 ctio->u.status0.flags |=
1843 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1844 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1845 ctio->u.status0.flags |= __constant_cpu_to_le16(
1846 CTIO7_FLAGS_EXPLICIT_CONFORM |
1847 CTIO7_FLAGS_CONFORM_REQ);
1848 }
1849 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1850 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1851 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1852 int i;
1853
1854 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1855 if (prm->cmd->se_cmd.scsi_status != 0) {
1856 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1857 "Skipping EXPLICIT_CONFORM and "
1858 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1859 "non GOOD status\n");
1860 goto skip_explict_conf;
1861 }
1862 ctio->u.status1.flags |= __constant_cpu_to_le16(
1863 CTIO7_FLAGS_EXPLICIT_CONFORM |
1864 CTIO7_FLAGS_CONFORM_REQ);
1865 }
1866 skip_explict_conf:
1867 ctio->u.status1.flags &=
1868 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1869 ctio->u.status1.flags |=
1870 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1871 ctio->u.status1.scsi_status |=
1872 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1873 ctio->u.status1.sense_length =
1874 cpu_to_le16(prm->sense_buffer_len);
1875 for (i = 0; i < prm->sense_buffer_len/4; i++)
1876 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1877 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1878 #if 0
1879 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1880 static int q;
1881 if (q < 10) {
1882 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1883 "qla_target(%d): %d bytes of sense "
1884 "lost", prm->tgt->ha->vp_idx,
1885 prm->sense_buffer_len % 4);
1886 q++;
1887 }
1888 }
1889 #endif
1890 } else {
1891 ctio->u.status1.flags &=
1892 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1893 ctio->u.status1.flags |=
1894 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1895 ctio->u.status1.sense_length = 0;
1896 memset(ctio->u.status1.sense_data, 0,
1897 sizeof(ctio->u.status1.sense_data));
1898 }
1899
1900 /* Sense with len > 24, is it possible ??? */
1901 }
1902
1903 /*
1904 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
1905 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
1906 */
1907 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
1908 uint8_t scsi_status)
1909 {
1910 struct scsi_qla_host *vha = cmd->vha;
1911 struct qla_hw_data *ha = vha->hw;
1912 struct ctio7_to_24xx *pkt;
1913 struct qla_tgt_prm prm;
1914 uint32_t full_req_cnt = 0;
1915 unsigned long flags = 0;
1916 int res;
1917
1918 memset(&prm, 0, sizeof(prm));
1919 qlt_check_srr_debug(cmd, &xmit_type);
1920
1921 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
1922 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
1923 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1924 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
1925
1926 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
1927 &full_req_cnt);
1928 if (unlikely(res != 0)) {
1929 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
1930 return 0;
1931
1932 return res;
1933 }
1934
1935 spin_lock_irqsave(&ha->hardware_lock, flags);
1936
1937 /* Does F/W have an IOCBs for this request */
1938 res = qlt_check_reserve_free_req(vha, full_req_cnt);
1939 if (unlikely(res))
1940 goto out_unmap_unlock;
1941
1942 res = qlt_24xx_build_ctio_pkt(&prm, vha);
1943 if (unlikely(res != 0))
1944 goto out_unmap_unlock;
1945
1946
1947 pkt = (struct ctio7_to_24xx *)prm.pkt;
1948
1949 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
1950 pkt->u.status0.flags |=
1951 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
1952 CTIO7_FLAGS_STATUS_MODE_0);
1953
1954 qlt_load_data_segments(&prm, vha);
1955
1956 if (prm.add_status_pkt == 0) {
1957 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1958 pkt->u.status0.scsi_status =
1959 cpu_to_le16(prm.rq_result);
1960 pkt->u.status0.residual =
1961 cpu_to_le32(prm.residual);
1962 pkt->u.status0.flags |= __constant_cpu_to_le16(
1963 CTIO7_FLAGS_SEND_STATUS);
1964 if (qlt_need_explicit_conf(ha, cmd, 0)) {
1965 pkt->u.status0.flags |=
1966 __constant_cpu_to_le16(
1967 CTIO7_FLAGS_EXPLICIT_CONFORM |
1968 CTIO7_FLAGS_CONFORM_REQ);
1969 }
1970 }
1971
1972 } else {
1973 /*
1974 * We have already made sure that there is sufficient
1975 * amount of request entries to not drop HW lock in
1976 * req_pkt().
1977 */
1978 struct ctio7_to_24xx *ctio =
1979 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
1980
1981 ql_dbg(ql_dbg_tgt, vha, 0xe019,
1982 "Building additional status packet\n");
1983
1984 memcpy(ctio, pkt, sizeof(*ctio));
1985 ctio->entry_count = 1;
1986 ctio->dseg_count = 0;
1987 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
1988 CTIO7_FLAGS_DATA_IN);
1989
1990 /* Real finish is ctio_m1's finish */
1991 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
1992 pkt->u.status0.flags |= __constant_cpu_to_le16(
1993 CTIO7_FLAGS_DONT_RET_CTIO);
1994 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
1995 &prm);
1996 pr_debug("Status CTIO7: %p\n", ctio);
1997 }
1998 } else
1999 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2000
2001
2002 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2003
2004 ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2005 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2006 pkt, scsi_status);
2007
2008 qla2x00_start_iocbs(vha, vha->req);
2009 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2010
2011 return 0;
2012
2013 out_unmap_unlock:
2014 if (cmd->sg_mapped)
2015 qlt_unmap_sg(vha, cmd);
2016 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2017
2018 return res;
2019 }
2020 EXPORT_SYMBOL(qlt_xmit_response);
2021
2022 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2023 {
2024 struct ctio7_to_24xx *pkt;
2025 struct scsi_qla_host *vha = cmd->vha;
2026 struct qla_hw_data *ha = vha->hw;
2027 struct qla_tgt *tgt = cmd->tgt;
2028 struct qla_tgt_prm prm;
2029 unsigned long flags;
2030 int res = 0;
2031
2032 memset(&prm, 0, sizeof(prm));
2033 prm.cmd = cmd;
2034 prm.tgt = tgt;
2035 prm.sg = NULL;
2036 prm.req_cnt = 1;
2037
2038 /* Send marker if required */
2039 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2040 return -EIO;
2041
2042 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2043 (int)vha->vp_idx);
2044
2045 /* Calculate number of entries and segments required */
2046 if (qlt_pci_map_calc_cnt(&prm) != 0)
2047 return -EAGAIN;
2048
2049 spin_lock_irqsave(&ha->hardware_lock, flags);
2050
2051 /* Does F/W have an IOCBs for this request */
2052 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2053 if (res != 0)
2054 goto out_unlock_free_unmap;
2055
2056 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2057 if (unlikely(res != 0))
2058 goto out_unlock_free_unmap;
2059 pkt = (struct ctio7_to_24xx *)prm.pkt;
2060 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2061 CTIO7_FLAGS_STATUS_MODE_0);
2062 qlt_load_data_segments(&prm, vha);
2063
2064 cmd->state = QLA_TGT_STATE_NEED_DATA;
2065
2066 qla2x00_start_iocbs(vha, vha->req);
2067 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2068
2069 return res;
2070
2071 out_unlock_free_unmap:
2072 if (cmd->sg_mapped)
2073 qlt_unmap_sg(vha, cmd);
2074 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2075
2076 return res;
2077 }
2078 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2079
2080 /* If hardware_lock held on entry, might drop it, then reaquire */
2081 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2082 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2083 struct qla_tgt_cmd *cmd,
2084 struct atio_from_isp *atio)
2085 {
2086 struct ctio7_to_24xx *ctio24;
2087 struct qla_hw_data *ha = vha->hw;
2088 request_t *pkt;
2089 int ret = 0;
2090
2091 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2092
2093 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2094 if (pkt == NULL) {
2095 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2096 "qla_target(%d): %s failed: unable to allocate "
2097 "request packet\n", vha->vp_idx, __func__);
2098 return -ENOMEM;
2099 }
2100
2101 if (cmd != NULL) {
2102 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2103 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2104 "qla_target(%d): Terminating cmd %p with "
2105 "incorrect state %d\n", vha->vp_idx, cmd,
2106 cmd->state);
2107 } else
2108 ret = 1;
2109 }
2110
2111 pkt->entry_count = 1;
2112 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2113
2114 ctio24 = (struct ctio7_to_24xx *)pkt;
2115 ctio24->entry_type = CTIO_TYPE7;
2116 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2117 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2118 ctio24->vp_index = vha->vp_idx;
2119 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2120 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2121 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2122 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2123 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2124 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2125 CTIO7_FLAGS_TERMINATE);
2126 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2127
2128 /* Most likely, it isn't needed */
2129 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2130 &atio->u.isp24.fcp_cmnd.add_cdb[
2131 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2132 if (ctio24->u.status1.residual != 0)
2133 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2134
2135 qla2x00_start_iocbs(vha, vha->req);
2136 return ret;
2137 }
2138
2139 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2140 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2141 {
2142 unsigned long flags;
2143 int rc;
2144
2145 if (qlt_issue_marker(vha, ha_locked) < 0)
2146 return;
2147
2148 if (ha_locked) {
2149 rc = __qlt_send_term_exchange(vha, cmd, atio);
2150 goto done;
2151 }
2152 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2153 rc = __qlt_send_term_exchange(vha, cmd, atio);
2154 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2155 done:
2156 if (rc == 1) {
2157 if (!ha_locked && !in_interrupt())
2158 msleep(250); /* just in case */
2159
2160 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2161 }
2162 }
2163
2164 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2165 {
2166 BUG_ON(cmd->sg_mapped);
2167
2168 if (unlikely(cmd->free_sg))
2169 kfree(cmd->sg);
2170 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2171 }
2172 EXPORT_SYMBOL(qlt_free_cmd);
2173
2174 /* ha->hardware_lock supposed to be held on entry */
2175 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2176 struct qla_tgt_cmd *cmd, void *ctio)
2177 {
2178 struct qla_tgt_srr_ctio *sc;
2179 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2180 struct qla_tgt_srr_imm *imm;
2181
2182 tgt->ctio_srr_id++;
2183
2184 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2185 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2186
2187 if (!ctio) {
2188 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2189 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2190 vha->vp_idx);
2191 return -EINVAL;
2192 }
2193
2194 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2195 if (sc != NULL) {
2196 sc->cmd = cmd;
2197 /* IRQ is already OFF */
2198 spin_lock(&tgt->srr_lock);
2199 sc->srr_id = tgt->ctio_srr_id;
2200 list_add_tail(&sc->srr_list_entry,
2201 &tgt->srr_ctio_list);
2202 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2203 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2204 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2205 int found = 0;
2206 list_for_each_entry(imm, &tgt->srr_imm_list,
2207 srr_list_entry) {
2208 if (imm->srr_id == sc->srr_id) {
2209 found = 1;
2210 break;
2211 }
2212 }
2213 if (found) {
2214 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2215 "Scheduling srr work\n");
2216 schedule_work(&tgt->srr_work);
2217 } else {
2218 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2219 "qla_target(%d): imm_srr_id "
2220 "== ctio_srr_id (%d), but there is no "
2221 "corresponding SRR IMM, deleting CTIO "
2222 "SRR %p\n", vha->vp_idx,
2223 tgt->ctio_srr_id, sc);
2224 list_del(&sc->srr_list_entry);
2225 spin_unlock(&tgt->srr_lock);
2226
2227 kfree(sc);
2228 return -EINVAL;
2229 }
2230 }
2231 spin_unlock(&tgt->srr_lock);
2232 } else {
2233 struct qla_tgt_srr_imm *ti;
2234
2235 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2236 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2237 vha->vp_idx);
2238 spin_lock(&tgt->srr_lock);
2239 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2240 srr_list_entry) {
2241 if (imm->srr_id == tgt->ctio_srr_id) {
2242 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2243 "IMM SRR %p deleted (id %d)\n",
2244 imm, imm->srr_id);
2245 list_del(&imm->srr_list_entry);
2246 qlt_reject_free_srr_imm(vha, imm, 1);
2247 }
2248 }
2249 spin_unlock(&tgt->srr_lock);
2250
2251 return -ENOMEM;
2252 }
2253
2254 return 0;
2255 }
2256
2257 /*
2258 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2259 */
2260 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2261 struct qla_tgt_cmd *cmd, uint32_t status)
2262 {
2263 int term = 0;
2264
2265 if (ctio != NULL) {
2266 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2267 term = !(c->flags &
2268 __constant_cpu_to_le16(OF_TERM_EXCH));
2269 } else
2270 term = 1;
2271
2272 if (term)
2273 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2274
2275 return term;
2276 }
2277
2278 /* ha->hardware_lock supposed to be held on entry */
2279 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2280 uint32_t handle)
2281 {
2282 struct qla_hw_data *ha = vha->hw;
2283
2284 handle--;
2285 if (ha->tgt.cmds[handle] != NULL) {
2286 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2287 ha->tgt.cmds[handle] = NULL;
2288 return cmd;
2289 } else
2290 return NULL;
2291 }
2292
2293 /* ha->hardware_lock supposed to be held on entry */
2294 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2295 uint32_t handle, void *ctio)
2296 {
2297 struct qla_tgt_cmd *cmd = NULL;
2298
2299 /* Clear out internal marks */
2300 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2301 CTIO_INTERMEDIATE_HANDLE_MARK);
2302
2303 if (handle != QLA_TGT_NULL_HANDLE) {
2304 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2305 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2306 "SKIP_HANDLE CTIO\n");
2307 return NULL;
2308 }
2309 /* handle-1 is actually used */
2310 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2311 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2312 "qla_target(%d): Wrong handle %x received\n",
2313 vha->vp_idx, handle);
2314 return NULL;
2315 }
2316 cmd = qlt_get_cmd(vha, handle);
2317 if (unlikely(cmd == NULL)) {
2318 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2319 "qla_target(%d): Suspicious: unable to "
2320 "find the command with handle %x\n", vha->vp_idx,
2321 handle);
2322 return NULL;
2323 }
2324 } else if (ctio != NULL) {
2325 /* We can't get loop ID from CTIO7 */
2326 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2327 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2328 "support NULL handles\n", vha->vp_idx);
2329 return NULL;
2330 }
2331
2332 return cmd;
2333 }
2334
2335 /*
2336 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2337 */
2338 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2339 uint32_t status, void *ctio)
2340 {
2341 struct qla_hw_data *ha = vha->hw;
2342 struct se_cmd *se_cmd;
2343 struct target_core_fabric_ops *tfo;
2344 struct qla_tgt_cmd *cmd;
2345
2346 ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2347 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2348 vha->vp_idx, ctio, status, handle);
2349
2350 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2351 /* That could happen only in case of an error/reset/abort */
2352 if (status != CTIO_SUCCESS) {
2353 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2354 "Intermediate CTIO received"
2355 " (status %x)\n", status);
2356 }
2357 return;
2358 }
2359
2360 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2361 if (cmd == NULL)
2362 return;
2363
2364 se_cmd = &cmd->se_cmd;
2365 tfo = se_cmd->se_tfo;
2366
2367 if (cmd->sg_mapped)
2368 qlt_unmap_sg(vha, cmd);
2369
2370 if (unlikely(status != CTIO_SUCCESS)) {
2371 switch (status & 0xFFFF) {
2372 case CTIO_LIP_RESET:
2373 case CTIO_TARGET_RESET:
2374 case CTIO_ABORTED:
2375 case CTIO_TIMEOUT:
2376 case CTIO_INVALID_RX_ID:
2377 /* They are OK */
2378 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2379 "qla_target(%d): CTIO with "
2380 "status %#x received, state %x, se_cmd %p, "
2381 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2382 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2383 status, cmd->state, se_cmd);
2384 break;
2385
2386 case CTIO_PORT_LOGGED_OUT:
2387 case CTIO_PORT_UNAVAILABLE:
2388 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2389 "qla_target(%d): CTIO with PORT LOGGED "
2390 "OUT (29) or PORT UNAVAILABLE (28) status %x "
2391 "received (state %x, se_cmd %p)\n", vha->vp_idx,
2392 status, cmd->state, se_cmd);
2393 break;
2394
2395 case CTIO_SRR_RECEIVED:
2396 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2397 "qla_target(%d): CTIO with SRR_RECEIVED"
2398 " status %x received (state %x, se_cmd %p)\n",
2399 vha->vp_idx, status, cmd->state, se_cmd);
2400 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2401 break;
2402 else
2403 return;
2404
2405 default:
2406 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2407 "qla_target(%d): CTIO with error status "
2408 "0x%x received (state %x, se_cmd %p\n",
2409 vha->vp_idx, status, cmd->state, se_cmd);
2410 break;
2411 }
2412
2413 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2414 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2415 return;
2416 }
2417
2418 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2419 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2420 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2421 int rx_status = 0;
2422
2423 cmd->state = QLA_TGT_STATE_DATA_IN;
2424
2425 if (unlikely(status != CTIO_SUCCESS))
2426 rx_status = -EIO;
2427 else
2428 cmd->write_data_transferred = 1;
2429
2430 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2431 "Data received, context %x, rx_status %d\n",
2432 0x0, rx_status);
2433
2434 ha->tgt.tgt_ops->handle_data(cmd);
2435 return;
2436 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2437 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2438 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2439 } else {
2440 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2441 "qla_target(%d): A command in state (%d) should "
2442 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2443 }
2444
2445 if (unlikely(status != CTIO_SUCCESS)) {
2446 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2447 dump_stack();
2448 }
2449
2450 ha->tgt.tgt_ops->free_cmd(cmd);
2451 }
2452
2453 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2454 uint8_t task_codes)
2455 {
2456 int fcp_task_attr;
2457
2458 switch (task_codes) {
2459 case ATIO_SIMPLE_QUEUE:
2460 fcp_task_attr = MSG_SIMPLE_TAG;
2461 break;
2462 case ATIO_HEAD_OF_QUEUE:
2463 fcp_task_attr = MSG_HEAD_TAG;
2464 break;
2465 case ATIO_ORDERED_QUEUE:
2466 fcp_task_attr = MSG_ORDERED_TAG;
2467 break;
2468 case ATIO_ACA_QUEUE:
2469 fcp_task_attr = MSG_ACA_TAG;
2470 break;
2471 case ATIO_UNTAGGED:
2472 fcp_task_attr = MSG_SIMPLE_TAG;
2473 break;
2474 default:
2475 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2476 "qla_target: unknown task code %x, use ORDERED instead\n",
2477 task_codes);
2478 fcp_task_attr = MSG_ORDERED_TAG;
2479 break;
2480 }
2481
2482 return fcp_task_attr;
2483 }
2484
2485 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2486 uint8_t *);
2487 /*
2488 * Process context for I/O path into tcm_qla2xxx code
2489 */
2490 static void qlt_do_work(struct work_struct *work)
2491 {
2492 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2493 scsi_qla_host_t *vha = cmd->vha;
2494 struct qla_hw_data *ha = vha->hw;
2495 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2496 struct qla_tgt_sess *sess = NULL;
2497 struct atio_from_isp *atio = &cmd->atio;
2498 unsigned char *cdb;
2499 unsigned long flags;
2500 uint32_t data_length;
2501 int ret, fcp_task_attr, data_dir, bidi = 0;
2502
2503 if (tgt->tgt_stop)
2504 goto out_term;
2505
2506 spin_lock_irqsave(&ha->hardware_lock, flags);
2507 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2508 atio->u.isp24.fcp_hdr.s_id);
2509 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2510 if (sess)
2511 kref_get(&sess->se_sess->sess_kref);
2512 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2513
2514 if (unlikely(!sess)) {
2515 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2516
2517 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2518 "qla_target(%d): Unable to find wwn login"
2519 " (s_id %x:%x:%x), trying to create it manually\n",
2520 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2521
2522 if (atio->u.raw.entry_count > 1) {
2523 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2524 "Dropping multy entry cmd %p\n", cmd);
2525 goto out_term;
2526 }
2527
2528 mutex_lock(&vha->vha_tgt.tgt_mutex);
2529 sess = qlt_make_local_sess(vha, s_id);
2530 /* sess has an extra creation ref. */
2531 mutex_unlock(&vha->vha_tgt.tgt_mutex);
2532
2533 if (!sess)
2534 goto out_term;
2535 }
2536
2537 cmd->sess = sess;
2538 cmd->loop_id = sess->loop_id;
2539 cmd->conf_compl_supported = sess->conf_compl_supported;
2540
2541 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2542 cmd->tag = atio->u.isp24.exchange_addr;
2543 cmd->unpacked_lun = scsilun_to_int(
2544 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2545
2546 if (atio->u.isp24.fcp_cmnd.rddata &&
2547 atio->u.isp24.fcp_cmnd.wrdata) {
2548 bidi = 1;
2549 data_dir = DMA_TO_DEVICE;
2550 } else if (atio->u.isp24.fcp_cmnd.rddata)
2551 data_dir = DMA_FROM_DEVICE;
2552 else if (atio->u.isp24.fcp_cmnd.wrdata)
2553 data_dir = DMA_TO_DEVICE;
2554 else
2555 data_dir = DMA_NONE;
2556
2557 fcp_task_attr = qlt_get_fcp_task_attr(vha,
2558 atio->u.isp24.fcp_cmnd.task_attr);
2559 data_length = be32_to_cpu(get_unaligned((uint32_t *)
2560 &atio->u.isp24.fcp_cmnd.add_cdb[
2561 atio->u.isp24.fcp_cmnd.add_cdb_len]));
2562
2563 ql_dbg(ql_dbg_tgt, vha, 0xe022,
2564 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2565 cmd, cmd->unpacked_lun, cmd->tag);
2566
2567 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2568 fcp_task_attr, data_dir, bidi);
2569 if (ret != 0)
2570 goto out_term;
2571 /*
2572 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2573 */
2574 spin_lock_irqsave(&ha->hardware_lock, flags);
2575 ha->tgt.tgt_ops->put_sess(sess);
2576 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2577 return;
2578
2579 out_term:
2580 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2581 /*
2582 * cmd has not sent to target yet, so pass NULL as the second
2583 * argument to qlt_send_term_exchange() and free the memory here.
2584 */
2585 spin_lock_irqsave(&ha->hardware_lock, flags);
2586 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2587 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2588 if (sess)
2589 ha->tgt.tgt_ops->put_sess(sess);
2590 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2591 }
2592
2593 /* ha->hardware_lock supposed to be held on entry */
2594 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2595 struct atio_from_isp *atio)
2596 {
2597 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2598 struct qla_tgt_cmd *cmd;
2599
2600 if (unlikely(tgt->tgt_stop)) {
2601 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2602 "New command while device %p is shutting down\n", tgt);
2603 return -EFAULT;
2604 }
2605
2606 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2607 if (!cmd) {
2608 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2609 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2610 return -ENOMEM;
2611 }
2612
2613 memcpy(&cmd->atio, atio, sizeof(*atio));
2614 cmd->state = QLA_TGT_STATE_NEW;
2615 cmd->tgt = vha->vha_tgt.qla_tgt;
2616 cmd->vha = vha;
2617
2618 INIT_WORK(&cmd->work, qlt_do_work);
2619 queue_work(qla_tgt_wq, &cmd->work);
2620 return 0;
2621
2622 }
2623
2624 /* ha->hardware_lock supposed to be held on entry */
2625 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2626 int fn, void *iocb, int flags)
2627 {
2628 struct scsi_qla_host *vha = sess->vha;
2629 struct qla_hw_data *ha = vha->hw;
2630 struct qla_tgt_mgmt_cmd *mcmd;
2631 int res;
2632 uint8_t tmr_func;
2633
2634 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2635 if (!mcmd) {
2636 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2637 "qla_target(%d): Allocation of management "
2638 "command failed, some commands and their data could "
2639 "leak\n", vha->vp_idx);
2640 return -ENOMEM;
2641 }
2642 memset(mcmd, 0, sizeof(*mcmd));
2643 mcmd->sess = sess;
2644
2645 if (iocb) {
2646 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2647 sizeof(mcmd->orig_iocb.imm_ntfy));
2648 }
2649 mcmd->tmr_func = fn;
2650 mcmd->flags = flags;
2651
2652 switch (fn) {
2653 case QLA_TGT_CLEAR_ACA:
2654 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2655 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2656 tmr_func = TMR_CLEAR_ACA;
2657 break;
2658
2659 case QLA_TGT_TARGET_RESET:
2660 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2661 "qla_target(%d): TARGET_RESET received\n",
2662 sess->vha->vp_idx);
2663 tmr_func = TMR_TARGET_WARM_RESET;
2664 break;
2665
2666 case QLA_TGT_LUN_RESET:
2667 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2668 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2669 tmr_func = TMR_LUN_RESET;
2670 break;
2671
2672 case QLA_TGT_CLEAR_TS:
2673 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2674 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2675 tmr_func = TMR_CLEAR_TASK_SET;
2676 break;
2677
2678 case QLA_TGT_ABORT_TS:
2679 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2680 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2681 tmr_func = TMR_ABORT_TASK_SET;
2682 break;
2683 #if 0
2684 case QLA_TGT_ABORT_ALL:
2685 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2686 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2687 sess->vha->vp_idx);
2688 tmr_func = 0;
2689 break;
2690
2691 case QLA_TGT_ABORT_ALL_SESS:
2692 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2693 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2694 sess->vha->vp_idx);
2695 tmr_func = 0;
2696 break;
2697
2698 case QLA_TGT_NEXUS_LOSS_SESS:
2699 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2700 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2701 sess->vha->vp_idx);
2702 tmr_func = 0;
2703 break;
2704
2705 case QLA_TGT_NEXUS_LOSS:
2706 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2707 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2708 tmr_func = 0;
2709 break;
2710 #endif
2711 default:
2712 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2713 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2714 sess->vha->vp_idx, fn);
2715 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2716 return -ENOSYS;
2717 }
2718
2719 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2720 if (res != 0) {
2721 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2722 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2723 sess->vha->vp_idx, res);
2724 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2725 return -EFAULT;
2726 }
2727
2728 return 0;
2729 }
2730
2731 /* ha->hardware_lock supposed to be held on entry */
2732 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2733 {
2734 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2735 struct qla_hw_data *ha = vha->hw;
2736 struct qla_tgt *tgt;
2737 struct qla_tgt_sess *sess;
2738 uint32_t lun, unpacked_lun;
2739 int lun_size, fn;
2740
2741 tgt = vha->vha_tgt.qla_tgt;
2742
2743 lun = a->u.isp24.fcp_cmnd.lun;
2744 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2745 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2746 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2747 a->u.isp24.fcp_hdr.s_id);
2748 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2749
2750 if (!sess) {
2751 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2752 "qla_target(%d): task mgmt fn 0x%x for "
2753 "non-existant session\n", vha->vp_idx, fn);
2754 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2755 sizeof(struct atio_from_isp));
2756 }
2757
2758 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2759 }
2760
2761 /* ha->hardware_lock supposed to be held on entry */
2762 static int __qlt_abort_task(struct scsi_qla_host *vha,
2763 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2764 {
2765 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2766 struct qla_hw_data *ha = vha->hw;
2767 struct qla_tgt_mgmt_cmd *mcmd;
2768 uint32_t lun, unpacked_lun;
2769 int rc;
2770
2771 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2772 if (mcmd == NULL) {
2773 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2774 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2775 vha->vp_idx, __func__);
2776 return -ENOMEM;
2777 }
2778 memset(mcmd, 0, sizeof(*mcmd));
2779
2780 mcmd->sess = sess;
2781 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2782 sizeof(mcmd->orig_iocb.imm_ntfy));
2783
2784 lun = a->u.isp24.fcp_cmnd.lun;
2785 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2786
2787 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2788 le16_to_cpu(iocb->u.isp2x.seq_id));
2789 if (rc != 0) {
2790 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2791 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2792 vha->vp_idx, rc);
2793 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2794 return -EFAULT;
2795 }
2796
2797 return 0;
2798 }
2799
2800 /* ha->hardware_lock supposed to be held on entry */
2801 static int qlt_abort_task(struct scsi_qla_host *vha,
2802 struct imm_ntfy_from_isp *iocb)
2803 {
2804 struct qla_hw_data *ha = vha->hw;
2805 struct qla_tgt_sess *sess;
2806 int loop_id;
2807
2808 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2809
2810 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2811 if (sess == NULL) {
2812 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2813 "qla_target(%d): task abort for unexisting "
2814 "session\n", vha->vp_idx);
2815 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
2816 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2817 }
2818
2819 return __qlt_abort_task(vha, iocb, sess);
2820 }
2821
2822 /*
2823 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2824 */
2825 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2826 struct imm_ntfy_from_isp *iocb)
2827 {
2828 int res = 0;
2829
2830 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2831 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
2832 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
2833
2834 switch (iocb->u.isp24.status_subcode) {
2835 case ELS_PLOGI:
2836 case ELS_FLOGI:
2837 case ELS_PRLI:
2838 case ELS_LOGO:
2839 case ELS_PRLO:
2840 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2841 break;
2842 case ELS_PDISC:
2843 case ELS_ADISC:
2844 {
2845 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2846 if (tgt->link_reinit_iocb_pending) {
2847 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2848 0, 0, 0, 0, 0, 0);
2849 tgt->link_reinit_iocb_pending = 0;
2850 }
2851 res = 1; /* send notify ack */
2852 break;
2853 }
2854
2855 default:
2856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2857 "qla_target(%d): Unsupported ELS command %x "
2858 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2859 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2860 break;
2861 }
2862
2863 return res;
2864 }
2865
2866 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
2867 {
2868 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
2869 size_t first_offset = 0, rem_offset = offset, tmp = 0;
2870 int i, sg_srr_cnt, bufflen = 0;
2871
2872 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
2873 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
2874 "cmd->sg_cnt: %u, direction: %d\n",
2875 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2876
2877 /*
2878 * FIXME: Reject non zero SRR relative offset until we can test
2879 * this code properly.
2880 */
2881 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
2882 return -1;
2883
2884 if (!cmd->sg || !cmd->sg_cnt) {
2885 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
2886 "Missing cmd->sg or zero cmd->sg_cnt in"
2887 " qla_tgt_set_data_offset\n");
2888 return -EINVAL;
2889 }
2890 /*
2891 * Walk the current cmd->sg list until we locate the new sg_srr_start
2892 */
2893 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
2894 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
2895 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
2896 i, sg, sg_page(sg), sg->length, sg->offset);
2897
2898 if ((sg->length + tmp) > offset) {
2899 first_offset = rem_offset;
2900 sg_srr_start = sg;
2901 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
2902 "Found matching sg[%d], using %p as sg_srr_start, "
2903 "and using first_offset: %zu\n", i, sg,
2904 first_offset);
2905 break;
2906 }
2907 tmp += sg->length;
2908 rem_offset -= sg->length;
2909 }
2910
2911 if (!sg_srr_start) {
2912 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
2913 "Unable to locate sg_srr_start for offset: %u\n", offset);
2914 return -EINVAL;
2915 }
2916 sg_srr_cnt = (cmd->sg_cnt - i);
2917
2918 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
2919 if (!sg_srr) {
2920 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
2921 "Unable to allocate sgp\n");
2922 return -ENOMEM;
2923 }
2924 sg_init_table(sg_srr, sg_srr_cnt);
2925 sgp = &sg_srr[0];
2926 /*
2927 * Walk the remaining list for sg_srr_start, mapping to the newly
2928 * allocated sg_srr taking first_offset into account.
2929 */
2930 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
2931 if (first_offset) {
2932 sg_set_page(sgp, sg_page(sg),
2933 (sg->length - first_offset), first_offset);
2934 first_offset = 0;
2935 } else {
2936 sg_set_page(sgp, sg_page(sg), sg->length, 0);
2937 }
2938 bufflen += sgp->length;
2939
2940 sgp = sg_next(sgp);
2941 if (!sgp)
2942 break;
2943 }
2944
2945 cmd->sg = sg_srr;
2946 cmd->sg_cnt = sg_srr_cnt;
2947 cmd->bufflen = bufflen;
2948 cmd->offset += offset;
2949 cmd->free_sg = 1;
2950
2951 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
2952 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
2953 cmd->sg_cnt);
2954 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
2955 cmd->bufflen);
2956 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
2957 cmd->offset);
2958
2959 if (cmd->sg_cnt < 0)
2960 BUG();
2961
2962 if (cmd->bufflen < 0)
2963 BUG();
2964
2965 return 0;
2966 }
2967
2968 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
2969 uint32_t srr_rel_offs, int *xmit_type)
2970 {
2971 int res = 0, rel_offs;
2972
2973 rel_offs = srr_rel_offs - cmd->offset;
2974 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
2975 srr_rel_offs, rel_offs);
2976
2977 *xmit_type = QLA_TGT_XMIT_ALL;
2978
2979 if (rel_offs < 0) {
2980 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
2981 "qla_target(%d): SRR rel_offs (%d) < 0",
2982 cmd->vha->vp_idx, rel_offs);
2983 res = -1;
2984 } else if (rel_offs == cmd->bufflen)
2985 *xmit_type = QLA_TGT_XMIT_STATUS;
2986 else if (rel_offs > 0)
2987 res = qlt_set_data_offset(cmd, rel_offs);
2988
2989 return res;
2990 }
2991
2992 /* No locks, thread context */
2993 static void qlt_handle_srr(struct scsi_qla_host *vha,
2994 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
2995 {
2996 struct imm_ntfy_from_isp *ntfy =
2997 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
2998 struct qla_hw_data *ha = vha->hw;
2999 struct qla_tgt_cmd *cmd = sctio->cmd;
3000 struct se_cmd *se_cmd = &cmd->se_cmd;
3001 unsigned long flags;
3002 int xmit_type = 0, resp = 0;
3003 uint32_t offset;
3004 uint16_t srr_ui;
3005
3006 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3007 srr_ui = ntfy->u.isp24.srr_ui;
3008
3009 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3010 cmd, srr_ui);
3011
3012 switch (srr_ui) {
3013 case SRR_IU_STATUS:
3014 spin_lock_irqsave(&ha->hardware_lock, flags);
3015 qlt_send_notify_ack(vha, ntfy,
3016 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3017 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3018 xmit_type = QLA_TGT_XMIT_STATUS;
3019 resp = 1;
3020 break;
3021 case SRR_IU_DATA_IN:
3022 if (!cmd->sg || !cmd->sg_cnt) {
3023 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3024 "Unable to process SRR_IU_DATA_IN due to"
3025 " missing cmd->sg, state: %d\n", cmd->state);
3026 dump_stack();
3027 goto out_reject;
3028 }
3029 if (se_cmd->scsi_status != 0) {
3030 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3031 "Rejecting SRR_IU_DATA_IN with non GOOD "
3032 "scsi_status\n");
3033 goto out_reject;
3034 }
3035 cmd->bufflen = se_cmd->data_length;
3036
3037 if (qlt_has_data(cmd)) {
3038 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3039 goto out_reject;
3040 spin_lock_irqsave(&ha->hardware_lock, flags);
3041 qlt_send_notify_ack(vha, ntfy,
3042 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3043 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3044 resp = 1;
3045 } else {
3046 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3047 "qla_target(%d): SRR for in data for cmd "
3048 "without them (tag %d, SCSI status %d), "
3049 "reject", vha->vp_idx, cmd->tag,
3050 cmd->se_cmd.scsi_status);
3051 goto out_reject;
3052 }
3053 break;
3054 case SRR_IU_DATA_OUT:
3055 if (!cmd->sg || !cmd->sg_cnt) {
3056 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3057 "Unable to process SRR_IU_DATA_OUT due to"
3058 " missing cmd->sg\n");
3059 dump_stack();
3060 goto out_reject;
3061 }
3062 if (se_cmd->scsi_status != 0) {
3063 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3064 "Rejecting SRR_IU_DATA_OUT"
3065 " with non GOOD scsi_status\n");
3066 goto out_reject;
3067 }
3068 cmd->bufflen = se_cmd->data_length;
3069
3070 if (qlt_has_data(cmd)) {
3071 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3072 goto out_reject;
3073 spin_lock_irqsave(&ha->hardware_lock, flags);
3074 qlt_send_notify_ack(vha, ntfy,
3075 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3076 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3077 if (xmit_type & QLA_TGT_XMIT_DATA)
3078 qlt_rdy_to_xfer(cmd);
3079 } else {
3080 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3081 "qla_target(%d): SRR for out data for cmd "
3082 "without them (tag %d, SCSI status %d), "
3083 "reject", vha->vp_idx, cmd->tag,
3084 cmd->se_cmd.scsi_status);
3085 goto out_reject;
3086 }
3087 break;
3088 default:
3089 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3090 "qla_target(%d): Unknown srr_ui value %x",
3091 vha->vp_idx, srr_ui);
3092 goto out_reject;
3093 }
3094
3095 /* Transmit response in case of status and data-in cases */
3096 if (resp)
3097 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3098
3099 return;
3100
3101 out_reject:
3102 spin_lock_irqsave(&ha->hardware_lock, flags);
3103 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3104 NOTIFY_ACK_SRR_FLAGS_REJECT,
3105 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3106 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3107 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3108 cmd->state = QLA_TGT_STATE_DATA_IN;
3109 dump_stack();
3110 } else
3111 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3112 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3113 }
3114
3115 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3116 struct qla_tgt_srr_imm *imm, int ha_locked)
3117 {
3118 struct qla_hw_data *ha = vha->hw;
3119 unsigned long flags = 0;
3120
3121 if (!ha_locked)
3122 spin_lock_irqsave(&ha->hardware_lock, flags);
3123
3124 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3125 NOTIFY_ACK_SRR_FLAGS_REJECT,
3126 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3127 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3128
3129 if (!ha_locked)
3130 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3131
3132 kfree(imm);
3133 }
3134
3135 static void qlt_handle_srr_work(struct work_struct *work)
3136 {
3137 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3138 struct scsi_qla_host *vha = tgt->vha;
3139 struct qla_tgt_srr_ctio *sctio;
3140 unsigned long flags;
3141
3142 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3143 tgt);
3144
3145 restart:
3146 spin_lock_irqsave(&tgt->srr_lock, flags);
3147 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3148 struct qla_tgt_srr_imm *imm, *i, *ti;
3149 struct qla_tgt_cmd *cmd;
3150 struct se_cmd *se_cmd;
3151
3152 imm = NULL;
3153 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3154 srr_list_entry) {
3155 if (i->srr_id == sctio->srr_id) {
3156 list_del(&i->srr_list_entry);
3157 if (imm) {
3158 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3159 "qla_target(%d): There must be "
3160 "only one IMM SRR per CTIO SRR "
3161 "(IMM SRR %p, id %d, CTIO %p\n",
3162 vha->vp_idx, i, i->srr_id, sctio);
3163 qlt_reject_free_srr_imm(tgt->vha, i, 0);
3164 } else
3165 imm = i;
3166 }
3167 }
3168
3169 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3170 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3171 sctio->srr_id);
3172
3173 if (imm == NULL) {
3174 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3175 "Not found matching IMM for SRR CTIO (id %d)\n",
3176 sctio->srr_id);
3177 continue;
3178 } else
3179 list_del(&sctio->srr_list_entry);
3180
3181 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3182
3183 cmd = sctio->cmd;
3184 /*
3185 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3186 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3187 * logic..
3188 */
3189 cmd->offset = 0;
3190 if (cmd->free_sg) {
3191 kfree(cmd->sg);
3192 cmd->sg = NULL;
3193 cmd->free_sg = 0;
3194 }
3195 se_cmd = &cmd->se_cmd;
3196
3197 cmd->sg_cnt = se_cmd->t_data_nents;
3198 cmd->sg = se_cmd->t_data_sg;
3199
3200 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3201 "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3202 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3203 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
3204 cmd->sg_cnt, cmd->offset);
3205
3206 qlt_handle_srr(vha, sctio, imm);
3207
3208 kfree(imm);
3209 kfree(sctio);
3210 goto restart;
3211 }
3212 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3213 }
3214
3215 /* ha->hardware_lock supposed to be held on entry */
3216 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3217 struct imm_ntfy_from_isp *iocb)
3218 {
3219 struct qla_tgt_srr_imm *imm;
3220 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3221 struct qla_tgt_srr_ctio *sctio;
3222
3223 tgt->imm_srr_id++;
3224
3225 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3226 vha->vp_idx);
3227
3228 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3229 if (imm != NULL) {
3230 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3231
3232 /* IRQ is already OFF */
3233 spin_lock(&tgt->srr_lock);
3234 imm->srr_id = tgt->imm_srr_id;
3235 list_add_tail(&imm->srr_list_entry,
3236 &tgt->srr_imm_list);
3237 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3238 "IMM NTFY SRR %p added (id %d, ui %x)\n",
3239 imm, imm->srr_id, iocb->u.isp24.srr_ui);
3240 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3241 int found = 0;
3242 list_for_each_entry(sctio, &tgt->srr_ctio_list,
3243 srr_list_entry) {
3244 if (sctio->srr_id == imm->srr_id) {
3245 found = 1;
3246 break;
3247 }
3248 }
3249 if (found) {
3250 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3251 "Scheduling srr work\n");
3252 schedule_work(&tgt->srr_work);
3253 } else {
3254 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3255 "qla_target(%d): imm_srr_id "
3256 "== ctio_srr_id (%d), but there is no "
3257 "corresponding SRR CTIO, deleting IMM "
3258 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3259 imm);
3260 list_del(&imm->srr_list_entry);
3261
3262 kfree(imm);
3263
3264 spin_unlock(&tgt->srr_lock);
3265 goto out_reject;
3266 }
3267 }
3268 spin_unlock(&tgt->srr_lock);
3269 } else {
3270 struct qla_tgt_srr_ctio *ts;
3271
3272 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3273 "qla_target(%d): Unable to allocate SRR IMM "
3274 "entry, SRR request will be rejected\n", vha->vp_idx);
3275
3276 /* IRQ is already OFF */
3277 spin_lock(&tgt->srr_lock);
3278 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3279 srr_list_entry) {
3280 if (sctio->srr_id == tgt->imm_srr_id) {
3281 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3282 "CTIO SRR %p deleted (id %d)\n",
3283 sctio, sctio->srr_id);
3284 list_del(&sctio->srr_list_entry);
3285 qlt_send_term_exchange(vha, sctio->cmd,
3286 &sctio->cmd->atio, 1);
3287 kfree(sctio);
3288 }
3289 }
3290 spin_unlock(&tgt->srr_lock);
3291 goto out_reject;
3292 }
3293
3294 return;
3295
3296 out_reject:
3297 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3298 NOTIFY_ACK_SRR_FLAGS_REJECT,
3299 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3300 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3301 }
3302
3303 /*
3304 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3305 */
3306 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3307 struct imm_ntfy_from_isp *iocb)
3308 {
3309 struct qla_hw_data *ha = vha->hw;
3310 uint32_t add_flags = 0;
3311 int send_notify_ack = 1;
3312 uint16_t status;
3313
3314 status = le16_to_cpu(iocb->u.isp2x.status);
3315 switch (status) {
3316 case IMM_NTFY_LIP_RESET:
3317 {
3318 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3319 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3320 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3321 iocb->u.isp24.status_subcode);
3322
3323 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3324 send_notify_ack = 0;
3325 break;
3326 }
3327
3328 case IMM_NTFY_LIP_LINK_REINIT:
3329 {
3330 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3331 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3332 "qla_target(%d): LINK REINIT (loop %#x, "
3333 "subcode %x)\n", vha->vp_idx,
3334 le16_to_cpu(iocb->u.isp24.nport_handle),
3335 iocb->u.isp24.status_subcode);
3336 if (tgt->link_reinit_iocb_pending) {
3337 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3338 0, 0, 0, 0, 0, 0);
3339 }
3340 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3341 tgt->link_reinit_iocb_pending = 1;
3342 /*
3343 * QLogic requires to wait after LINK REINIT for possible
3344 * PDISC or ADISC ELS commands
3345 */
3346 send_notify_ack = 0;
3347 break;
3348 }
3349
3350 case IMM_NTFY_PORT_LOGOUT:
3351 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3352 "qla_target(%d): Port logout (loop "
3353 "%#x, subcode %x)\n", vha->vp_idx,
3354 le16_to_cpu(iocb->u.isp24.nport_handle),
3355 iocb->u.isp24.status_subcode);
3356
3357 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3358 send_notify_ack = 0;
3359 /* The sessions will be cleared in the callback, if needed */
3360 break;
3361
3362 case IMM_NTFY_GLBL_TPRLO:
3363 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3364 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3365 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3366 send_notify_ack = 0;
3367 /* The sessions will be cleared in the callback, if needed */
3368 break;
3369
3370 case IMM_NTFY_PORT_CONFIG:
3371 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3372 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3373 status);
3374 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3375 send_notify_ack = 0;
3376 /* The sessions will be cleared in the callback, if needed */
3377 break;
3378
3379 case IMM_NTFY_GLBL_LOGO:
3380 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3381 "qla_target(%d): Link failure detected\n",
3382 vha->vp_idx);
3383 /* I_T nexus loss */
3384 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3385 send_notify_ack = 0;
3386 break;
3387
3388 case IMM_NTFY_IOCB_OVERFLOW:
3389 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3390 "qla_target(%d): Cannot provide requested "
3391 "capability (IOCB overflowed the immediate notify "
3392 "resource count)\n", vha->vp_idx);
3393 break;
3394
3395 case IMM_NTFY_ABORT_TASK:
3396 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3397 "qla_target(%d): Abort Task (S %08x I %#x -> "
3398 "L %#x)\n", vha->vp_idx,
3399 le16_to_cpu(iocb->u.isp2x.seq_id),
3400 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3401 le16_to_cpu(iocb->u.isp2x.lun));
3402 if (qlt_abort_task(vha, iocb) == 0)
3403 send_notify_ack = 0;
3404 break;
3405
3406 case IMM_NTFY_RESOURCE:
3407 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3408 "qla_target(%d): Out of resources, host %ld\n",
3409 vha->vp_idx, vha->host_no);
3410 break;
3411
3412 case IMM_NTFY_MSG_RX:
3413 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3414 "qla_target(%d): Immediate notify task %x\n",
3415 vha->vp_idx, iocb->u.isp2x.task_flags);
3416 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3417 send_notify_ack = 0;
3418 break;
3419
3420 case IMM_NTFY_ELS:
3421 if (qlt_24xx_handle_els(vha, iocb) == 0)
3422 send_notify_ack = 0;
3423 break;
3424
3425 case IMM_NTFY_SRR:
3426 qlt_prepare_srr_imm(vha, iocb);
3427 send_notify_ack = 0;
3428 break;
3429
3430 default:
3431 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3432 "qla_target(%d): Received unknown immediate "
3433 "notify status %x\n", vha->vp_idx, status);
3434 break;
3435 }
3436
3437 if (send_notify_ack)
3438 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3439 }
3440
3441 /*
3442 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3443 * This function sends busy to ISP 2xxx or 24xx.
3444 */
3445 static void qlt_send_busy(struct scsi_qla_host *vha,
3446 struct atio_from_isp *atio, uint16_t status)
3447 {
3448 struct ctio7_to_24xx *ctio24;
3449 struct qla_hw_data *ha = vha->hw;
3450 request_t *pkt;
3451 struct qla_tgt_sess *sess = NULL;
3452
3453 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3454 atio->u.isp24.fcp_hdr.s_id);
3455 if (!sess) {
3456 qlt_send_term_exchange(vha, NULL, atio, 1);
3457 return;
3458 }
3459 /* Sending marker isn't necessary, since we called from ISR */
3460
3461 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3462 if (!pkt) {
3463 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3464 "qla_target(%d): %s failed: unable to allocate "
3465 "request packet", vha->vp_idx, __func__);
3466 return;
3467 }
3468
3469 pkt->entry_count = 1;
3470 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3471
3472 ctio24 = (struct ctio7_to_24xx *)pkt;
3473 ctio24->entry_type = CTIO_TYPE7;
3474 ctio24->nport_handle = sess->loop_id;
3475 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3476 ctio24->vp_index = vha->vp_idx;
3477 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3478 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3479 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3480 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3481 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3482 __constant_cpu_to_le16(
3483 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3484 CTIO7_FLAGS_DONT_RET_CTIO);
3485 /*
3486 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3487 * if the explicit conformation is used.
3488 */
3489 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3490 ctio24->u.status1.scsi_status = cpu_to_le16(status);
3491 ctio24->u.status1.residual = get_unaligned((uint32_t *)
3492 &atio->u.isp24.fcp_cmnd.add_cdb[
3493 atio->u.isp24.fcp_cmnd.add_cdb_len]);
3494 if (ctio24->u.status1.residual != 0)
3495 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3496
3497 qla2x00_start_iocbs(vha, vha->req);
3498 }
3499
3500 /* ha->hardware_lock supposed to be held on entry */
3501 /* called via callback from qla2xxx */
3502 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3503 struct atio_from_isp *atio)
3504 {
3505 struct qla_hw_data *ha = vha->hw;
3506 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3507 int rc;
3508
3509 if (unlikely(tgt == NULL)) {
3510 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3511 "ATIO pkt, but no tgt (ha %p)", ha);
3512 return;
3513 }
3514 ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3515 "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3516 vha->vp_idx, atio, atio->u.raw.entry_type,
3517 atio->u.raw.entry_count);
3518 /*
3519 * In tgt_stop mode we also should allow all requests to pass.
3520 * Otherwise, some commands can stuck.
3521 */
3522
3523 tgt->irq_cmd_count++;
3524
3525 switch (atio->u.raw.entry_type) {
3526 case ATIO_TYPE7:
3527 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3528 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3529 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3530 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3531 atio->u.isp24.fcp_cmnd.rddata,
3532 atio->u.isp24.fcp_cmnd.wrdata,
3533 atio->u.isp24.fcp_cmnd.add_cdb_len,
3534 be32_to_cpu(get_unaligned((uint32_t *)
3535 &atio->u.isp24.fcp_cmnd.add_cdb[
3536 atio->u.isp24.fcp_cmnd.add_cdb_len])),
3537 atio->u.isp24.fcp_hdr.s_id[0],
3538 atio->u.isp24.fcp_hdr.s_id[1],
3539 atio->u.isp24.fcp_hdr.s_id[2]);
3540
3541 if (unlikely(atio->u.isp24.exchange_addr ==
3542 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3543 ql_dbg(ql_dbg_tgt, vha, 0xe058,
3544 "qla_target(%d): ATIO_TYPE7 "
3545 "received with UNKNOWN exchange address, "
3546 "sending QUEUE_FULL\n", vha->vp_idx);
3547 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3548 break;
3549 }
3550 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3551 rc = qlt_handle_cmd_for_atio(vha, atio);
3552 else
3553 rc = qlt_handle_task_mgmt(vha, atio);
3554 if (unlikely(rc != 0)) {
3555 if (rc == -ESRCH) {
3556 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3557 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3558 #else
3559 qlt_send_term_exchange(vha, NULL, atio, 1);
3560 #endif
3561 } else {
3562 if (tgt->tgt_stop) {
3563 ql_dbg(ql_dbg_tgt, vha, 0xe059,
3564 "qla_target: Unable to send "
3565 "command to target for req, "
3566 "ignoring.\n");
3567 } else {
3568 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3569 "qla_target(%d): Unable to send "
3570 "command to target, sending BUSY "
3571 "status.\n", vha->vp_idx);
3572 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3573 }
3574 }
3575 }
3576 break;
3577
3578 case IMMED_NOTIFY_TYPE:
3579 {
3580 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3581 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3582 "qla_target(%d): Received ATIO packet %x "
3583 "with error status %x\n", vha->vp_idx,
3584 atio->u.raw.entry_type,
3585 atio->u.isp2x.entry_status);
3586 break;
3587 }
3588 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3589 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3590 break;
3591 }
3592
3593 default:
3594 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3595 "qla_target(%d): Received unknown ATIO atio "
3596 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3597 break;
3598 }
3599
3600 tgt->irq_cmd_count--;
3601 }
3602
3603 /* ha->hardware_lock supposed to be held on entry */
3604 /* called via callback from qla2xxx */
3605 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3606 {
3607 struct qla_hw_data *ha = vha->hw;
3608 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3609
3610 if (unlikely(tgt == NULL)) {
3611 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3612 "qla_target(%d): Response pkt %x received, but no "
3613 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3614 return;
3615 }
3616
3617 ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3618 "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3619 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3620 pkt->entry_count, pkt->entry_status, pkt->handle);
3621
3622 /*
3623 * In tgt_stop mode we also should allow all requests to pass.
3624 * Otherwise, some commands can stuck.
3625 */
3626
3627 tgt->irq_cmd_count++;
3628
3629 switch (pkt->entry_type) {
3630 case CTIO_TYPE7:
3631 {
3632 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3633 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3634 vha->vp_idx);
3635 qlt_do_ctio_completion(vha, entry->handle,
3636 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3637 entry);
3638 break;
3639 }
3640
3641 case ACCEPT_TGT_IO_TYPE:
3642 {
3643 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3644 int rc;
3645 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3646 "ACCEPT_TGT_IO instance %d status %04x "
3647 "lun %04x read/write %d data_length %04x "
3648 "target_id %02x rx_id %04x\n ", vha->vp_idx,
3649 le16_to_cpu(atio->u.isp2x.status),
3650 le16_to_cpu(atio->u.isp2x.lun),
3651 atio->u.isp2x.execution_codes,
3652 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3653 atio), atio->u.isp2x.rx_id);
3654 if (atio->u.isp2x.status !=
3655 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3656 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3657 "qla_target(%d): ATIO with error "
3658 "status %x received\n", vha->vp_idx,
3659 le16_to_cpu(atio->u.isp2x.status));
3660 break;
3661 }
3662 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3663 "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3664 atio->u.isp2x.cdb[0], (unsigned long
3665 int)sizeof(atio->u.isp2x.cdb));
3666
3667 rc = qlt_handle_cmd_for_atio(vha, atio);
3668 if (unlikely(rc != 0)) {
3669 if (rc == -ESRCH) {
3670 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3671 qlt_send_busy(vha, atio, 0);
3672 #else
3673 qlt_send_term_exchange(vha, NULL, atio, 1);
3674 #endif
3675 } else {
3676 if (tgt->tgt_stop) {
3677 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3678 "qla_target: Unable to send "
3679 "command to target, sending TERM "
3680 "EXCHANGE for rsp\n");
3681 qlt_send_term_exchange(vha, NULL,
3682 atio, 1);
3683 } else {
3684 ql_dbg(ql_dbg_tgt, vha, 0xe060,
3685 "qla_target(%d): Unable to send "
3686 "command to target, sending BUSY "
3687 "status\n", vha->vp_idx);
3688 qlt_send_busy(vha, atio, 0);
3689 }
3690 }
3691 }
3692 }
3693 break;
3694
3695 case CONTINUE_TGT_IO_TYPE:
3696 {
3697 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3698 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3699 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3700 qlt_do_ctio_completion(vha, entry->handle,
3701 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3702 entry);
3703 break;
3704 }
3705
3706 case CTIO_A64_TYPE:
3707 {
3708 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3709 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3710 vha->vp_idx);
3711 qlt_do_ctio_completion(vha, entry->handle,
3712 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3713 entry);
3714 break;
3715 }
3716
3717 case IMMED_NOTIFY_TYPE:
3718 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3719 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3720 break;
3721
3722 case NOTIFY_ACK_TYPE:
3723 if (tgt->notify_ack_expected > 0) {
3724 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3725 ql_dbg(ql_dbg_tgt, vha, 0xe036,
3726 "NOTIFY_ACK seq %08x status %x\n",
3727 le16_to_cpu(entry->u.isp2x.seq_id),
3728 le16_to_cpu(entry->u.isp2x.status));
3729 tgt->notify_ack_expected--;
3730 if (entry->u.isp2x.status !=
3731 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3732 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3733 "qla_target(%d): NOTIFY_ACK "
3734 "failed %x\n", vha->vp_idx,
3735 le16_to_cpu(entry->u.isp2x.status));
3736 }
3737 } else {
3738 ql_dbg(ql_dbg_tgt, vha, 0xe062,
3739 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3740 vha->vp_idx);
3741 }
3742 break;
3743
3744 case ABTS_RECV_24XX:
3745 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3746 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3747 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3748 break;
3749
3750 case ABTS_RESP_24XX:
3751 if (tgt->abts_resp_expected > 0) {
3752 struct abts_resp_from_24xx_fw *entry =
3753 (struct abts_resp_from_24xx_fw *)pkt;
3754 ql_dbg(ql_dbg_tgt, vha, 0xe038,
3755 "ABTS_RESP_24XX: compl_status %x\n",
3756 entry->compl_status);
3757 tgt->abts_resp_expected--;
3758 if (le16_to_cpu(entry->compl_status) !=
3759 ABTS_RESP_COMPL_SUCCESS) {
3760 if ((entry->error_subcode1 == 0x1E) &&
3761 (entry->error_subcode2 == 0)) {
3762 /*
3763 * We've got a race here: aborted
3764 * exchange not terminated, i.e.
3765 * response for the aborted command was
3766 * sent between the abort request was
3767 * received and processed.
3768 * Unfortunately, the firmware has a
3769 * silly requirement that all aborted
3770 * exchanges must be explicitely
3771 * terminated, otherwise it refuses to
3772 * send responses for the abort
3773 * requests. So, we have to
3774 * (re)terminate the exchange and retry
3775 * the abort response.
3776 */
3777 qlt_24xx_retry_term_exchange(vha,
3778 entry);
3779 } else
3780 ql_dbg(ql_dbg_tgt, vha, 0xe063,
3781 "qla_target(%d): ABTS_RESP_24XX "
3782 "failed %x (subcode %x:%x)",
3783 vha->vp_idx, entry->compl_status,
3784 entry->error_subcode1,
3785 entry->error_subcode2);
3786 }
3787 } else {
3788 ql_dbg(ql_dbg_tgt, vha, 0xe064,
3789 "qla_target(%d): Unexpected ABTS_RESP_24XX "
3790 "received\n", vha->vp_idx);
3791 }
3792 break;
3793
3794 default:
3795 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3796 "qla_target(%d): Received unknown response pkt "
3797 "type %x\n", vha->vp_idx, pkt->entry_type);
3798 break;
3799 }
3800
3801 tgt->irq_cmd_count--;
3802 }
3803
3804 /*
3805 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3806 */
3807 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3808 uint16_t *mailbox)
3809 {
3810 struct qla_hw_data *ha = vha->hw;
3811 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3812 int login_code;
3813
3814 ql_dbg(ql_dbg_tgt, vha, 0xe039,
3815 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3816 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3817 ha->operating_mode, ha->current_topology);
3818
3819 if (!ha->tgt.tgt_ops)
3820 return;
3821
3822 if (unlikely(tgt == NULL)) {
3823 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3824 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3825 return;
3826 }
3827
3828 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3829 IS_QLA2100(ha))
3830 return;
3831 /*
3832 * In tgt_stop mode we also should allow all requests to pass.
3833 * Otherwise, some commands can stuck.
3834 */
3835
3836 tgt->irq_cmd_count++;
3837
3838 switch (code) {
3839 case MBA_RESET: /* Reset */
3840 case MBA_SYSTEM_ERR: /* System Error */
3841 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
3842 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
3843 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3844 "qla_target(%d): System error async event %#x "
3845 "occurred", vha->vp_idx, code);
3846 break;
3847 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
3848 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3849 break;
3850
3851 case MBA_LOOP_UP:
3852 {
3853 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3854 "qla_target(%d): Async LOOP_UP occurred "
3855 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3856 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3857 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3858 if (tgt->link_reinit_iocb_pending) {
3859 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3860 0, 0, 0, 0, 0, 0);
3861 tgt->link_reinit_iocb_pending = 0;
3862 }
3863 break;
3864 }
3865
3866 case MBA_LIP_OCCURRED:
3867 case MBA_LOOP_DOWN:
3868 case MBA_LIP_RESET:
3869 case MBA_RSCN_UPDATE:
3870 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
3871 "qla_target(%d): Async event %#x occurred "
3872 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3873 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3874 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3875 break;
3876
3877 case MBA_PORT_UPDATE:
3878 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
3879 "qla_target(%d): Port update async event %#x "
3880 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
3881 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3882 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3883 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3884
3885 login_code = le16_to_cpu(mailbox[2]);
3886 if (login_code == 0x4)
3887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
3888 "Async MB 2: Got PLOGI Complete\n");
3889 else if (login_code == 0x7)
3890 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
3891 "Async MB 2: Port Logged Out\n");
3892 break;
3893
3894 default:
3895 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
3896 "qla_target(%d): Async event %#x occurred: "
3897 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3898 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3899 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3900 break;
3901 }
3902
3903 tgt->irq_cmd_count--;
3904 }
3905
3906 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
3907 uint16_t loop_id)
3908 {
3909 fc_port_t *fcport;
3910 int rc;
3911
3912 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
3913 if (!fcport) {
3914 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
3915 "qla_target(%d): Allocation of tmp FC port failed",
3916 vha->vp_idx);
3917 return NULL;
3918 }
3919
3920 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
3921
3922 fcport->loop_id = loop_id;
3923
3924 rc = qla2x00_get_port_database(vha, fcport, 0);
3925 if (rc != QLA_SUCCESS) {
3926 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
3927 "qla_target(%d): Failed to retrieve fcport "
3928 "information -- get_port_database() returned %x "
3929 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
3930 kfree(fcport);
3931 return NULL;
3932 }
3933
3934 return fcport;
3935 }
3936
3937 /* Must be called under tgt_mutex */
3938 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
3939 uint8_t *s_id)
3940 {
3941 struct qla_tgt_sess *sess = NULL;
3942 fc_port_t *fcport = NULL;
3943 int rc, global_resets;
3944 uint16_t loop_id = 0;
3945
3946 retry:
3947 global_resets =
3948 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
3949
3950 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
3951 if (rc != 0) {
3952 if ((s_id[0] == 0xFF) &&
3953 (s_id[1] == 0xFC)) {
3954 /*
3955 * This is Domain Controller, so it should be
3956 * OK to drop SCSI commands from it.
3957 */
3958 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
3959 "Unable to find initiator with S_ID %x:%x:%x",
3960 s_id[0], s_id[1], s_id[2]);
3961 } else
3962 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
3963 "qla_target(%d): Unable to find "
3964 "initiator with S_ID %x:%x:%x",
3965 vha->vp_idx, s_id[0], s_id[1],
3966 s_id[2]);
3967 return NULL;
3968 }
3969
3970 fcport = qlt_get_port_database(vha, loop_id);
3971 if (!fcport)
3972 return NULL;
3973
3974 if (global_resets !=
3975 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
3976 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
3977 "qla_target(%d): global reset during session discovery "
3978 "(counter was %d, new %d), retrying", vha->vp_idx,
3979 global_resets,
3980 atomic_read(&vha->vha_tgt.
3981 qla_tgt->tgt_global_resets_count));
3982 goto retry;
3983 }
3984
3985 sess = qlt_create_sess(vha, fcport, true);
3986
3987 kfree(fcport);
3988 return sess;
3989 }
3990
3991 static void qlt_abort_work(struct qla_tgt *tgt,
3992 struct qla_tgt_sess_work_param *prm)
3993 {
3994 struct scsi_qla_host *vha = tgt->vha;
3995 struct qla_hw_data *ha = vha->hw;
3996 struct qla_tgt_sess *sess = NULL;
3997 unsigned long flags;
3998 uint32_t be_s_id;
3999 uint8_t s_id[3];
4000 int rc;
4001
4002 spin_lock_irqsave(&ha->hardware_lock, flags);
4003
4004 if (tgt->tgt_stop)
4005 goto out_term;
4006
4007 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4008 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4009 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4010
4011 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4012 (unsigned char *)&be_s_id);
4013 if (!sess) {
4014 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4015
4016 mutex_lock(&vha->vha_tgt.tgt_mutex);
4017 sess = qlt_make_local_sess(vha, s_id);
4018 /* sess has got an extra creation ref */
4019 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4020
4021 spin_lock_irqsave(&ha->hardware_lock, flags);
4022 if (!sess)
4023 goto out_term;
4024 } else {
4025 kref_get(&sess->se_sess->sess_kref);
4026 }
4027
4028 if (tgt->tgt_stop)
4029 goto out_term;
4030
4031 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4032 if (rc != 0)
4033 goto out_term;
4034
4035 ha->tgt.tgt_ops->put_sess(sess);
4036 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4037 return;
4038
4039 out_term:
4040 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4041 if (sess)
4042 ha->tgt.tgt_ops->put_sess(sess);
4043 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4044 }
4045
4046 static void qlt_tmr_work(struct qla_tgt *tgt,
4047 struct qla_tgt_sess_work_param *prm)
4048 {
4049 struct atio_from_isp *a = &prm->tm_iocb2;
4050 struct scsi_qla_host *vha = tgt->vha;
4051 struct qla_hw_data *ha = vha->hw;
4052 struct qla_tgt_sess *sess = NULL;
4053 unsigned long flags;
4054 uint8_t *s_id = NULL; /* to hide compiler warnings */
4055 int rc;
4056 uint32_t lun, unpacked_lun;
4057 int lun_size, fn;
4058 void *iocb;
4059
4060 spin_lock_irqsave(&ha->hardware_lock, flags);
4061
4062 if (tgt->tgt_stop)
4063 goto out_term;
4064
4065 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4066 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4067 if (!sess) {
4068 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4069
4070 mutex_lock(&vha->vha_tgt.tgt_mutex);
4071 sess = qlt_make_local_sess(vha, s_id);
4072 /* sess has got an extra creation ref */
4073 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4074
4075 spin_lock_irqsave(&ha->hardware_lock, flags);
4076 if (!sess)
4077 goto out_term;
4078 } else {
4079 kref_get(&sess->se_sess->sess_kref);
4080 }
4081
4082 iocb = a;
4083 lun = a->u.isp24.fcp_cmnd.lun;
4084 lun_size = sizeof(lun);
4085 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4086 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4087
4088 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4089 if (rc != 0)
4090 goto out_term;
4091
4092 ha->tgt.tgt_ops->put_sess(sess);
4093 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4094 return;
4095
4096 out_term:
4097 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4098 if (sess)
4099 ha->tgt.tgt_ops->put_sess(sess);
4100 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4101 }
4102
4103 static void qlt_sess_work_fn(struct work_struct *work)
4104 {
4105 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4106 struct scsi_qla_host *vha = tgt->vha;
4107 unsigned long flags;
4108
4109 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4110
4111 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4112 while (!list_empty(&tgt->sess_works_list)) {
4113 struct qla_tgt_sess_work_param *prm = list_entry(
4114 tgt->sess_works_list.next, typeof(*prm),
4115 sess_works_list_entry);
4116
4117 /*
4118 * This work can be scheduled on several CPUs at time, so we
4119 * must delete the entry to eliminate double processing
4120 */
4121 list_del(&prm->sess_works_list_entry);
4122
4123 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4124
4125 switch (prm->type) {
4126 case QLA_TGT_SESS_WORK_ABORT:
4127 qlt_abort_work(tgt, prm);
4128 break;
4129 case QLA_TGT_SESS_WORK_TM:
4130 qlt_tmr_work(tgt, prm);
4131 break;
4132 default:
4133 BUG_ON(1);
4134 break;
4135 }
4136
4137 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4138
4139 kfree(prm);
4140 }
4141 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4142 }
4143
4144 /* Must be called under tgt_host_action_mutex */
4145 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4146 {
4147 struct qla_tgt *tgt;
4148
4149 if (!QLA_TGT_MODE_ENABLED())
4150 return 0;
4151
4152 if (!IS_TGT_MODE_CAPABLE(ha)) {
4153 ql_log(ql_log_warn, base_vha, 0xe070,
4154 "This adapter does not support target mode.\n");
4155 return 0;
4156 }
4157
4158 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4159 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
4160
4161 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
4162
4163 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4164 if (!tgt) {
4165 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4166 "Unable to allocate struct qla_tgt\n");
4167 return -ENOMEM;
4168 }
4169
4170 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4171 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4172
4173 tgt->ha = ha;
4174 tgt->vha = base_vha;
4175 init_waitqueue_head(&tgt->waitQ);
4176 INIT_LIST_HEAD(&tgt->sess_list);
4177 INIT_LIST_HEAD(&tgt->del_sess_list);
4178 INIT_DELAYED_WORK(&tgt->sess_del_work,
4179 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4180 spin_lock_init(&tgt->sess_work_lock);
4181 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4182 INIT_LIST_HEAD(&tgt->sess_works_list);
4183 spin_lock_init(&tgt->srr_lock);
4184 INIT_LIST_HEAD(&tgt->srr_ctio_list);
4185 INIT_LIST_HEAD(&tgt->srr_imm_list);
4186 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4187 atomic_set(&tgt->tgt_global_resets_count, 0);
4188
4189 base_vha->vha_tgt.qla_tgt = tgt;
4190
4191 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4192 "qla_target(%d): using 64 Bit PCI addressing",
4193 base_vha->vp_idx);
4194 tgt->tgt_enable_64bit_addr = 1;
4195 /* 3 is reserved */
4196 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4197 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4198 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4199
4200 if (base_vha->fc_vport)
4201 return 0;
4202
4203 mutex_lock(&qla_tgt_mutex);
4204 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4205 mutex_unlock(&qla_tgt_mutex);
4206
4207 return 0;
4208 }
4209
4210 /* Must be called under tgt_host_action_mutex */
4211 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4212 {
4213 if (!vha->vha_tgt.qla_tgt)
4214 return 0;
4215
4216 if (vha->fc_vport) {
4217 qlt_release(vha->vha_tgt.qla_tgt);
4218 return 0;
4219 }
4220 mutex_lock(&qla_tgt_mutex);
4221 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
4222 mutex_unlock(&qla_tgt_mutex);
4223
4224 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4225 vha->host_no, ha);
4226 qlt_release(vha->vha_tgt.qla_tgt);
4227
4228 return 0;
4229 }
4230
4231 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4232 unsigned char *b)
4233 {
4234 int i;
4235
4236 pr_debug("qla2xxx HW vha->node_name: ");
4237 for (i = 0; i < WWN_SIZE; i++)
4238 pr_debug("%02x ", vha->node_name[i]);
4239 pr_debug("\n");
4240 pr_debug("qla2xxx HW vha->port_name: ");
4241 for (i = 0; i < WWN_SIZE; i++)
4242 pr_debug("%02x ", vha->port_name[i]);
4243 pr_debug("\n");
4244
4245 pr_debug("qla2xxx passed configfs WWPN: ");
4246 put_unaligned_be64(wwpn, b);
4247 for (i = 0; i < WWN_SIZE; i++)
4248 pr_debug("%02x ", b[i]);
4249 pr_debug("\n");
4250 }
4251
4252 /**
4253 * qla_tgt_lport_register - register lport with external module
4254 *
4255 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4256 * @wwpn: Passwd FC target WWPN
4257 * @callback: lport initialization callback for tcm_qla2xxx code
4258 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4259 */
4260 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
4261 u64 npiv_wwpn, u64 npiv_wwnn,
4262 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
4263 {
4264 struct qla_tgt *tgt;
4265 struct scsi_qla_host *vha;
4266 struct qla_hw_data *ha;
4267 struct Scsi_Host *host;
4268 unsigned long flags;
4269 int rc;
4270 u8 b[WWN_SIZE];
4271
4272 mutex_lock(&qla_tgt_mutex);
4273 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4274 vha = tgt->vha;
4275 ha = vha->hw;
4276
4277 host = vha->host;
4278 if (!host)
4279 continue;
4280
4281 if (!(host->hostt->supported_mode & MODE_TARGET))
4282 continue;
4283
4284 spin_lock_irqsave(&ha->hardware_lock, flags);
4285 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
4286 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4287 host->host_no);
4288 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4289 continue;
4290 }
4291 if (tgt->tgt_stop) {
4292 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
4293 host->host_no);
4294 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4295 continue;
4296 }
4297 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4298
4299 if (!scsi_host_get(host)) {
4300 ql_dbg(ql_dbg_tgt, vha, 0xe068,
4301 "Unable to scsi_host_get() for"
4302 " qla2xxx scsi_host\n");
4303 continue;
4304 }
4305 qlt_lport_dump(vha, phys_wwpn, b);
4306
4307 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4308 scsi_host_put(host);
4309 continue;
4310 }
4311 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
4312 if (rc != 0)
4313 scsi_host_put(host);
4314
4315 mutex_unlock(&qla_tgt_mutex);
4316 return rc;
4317 }
4318 mutex_unlock(&qla_tgt_mutex);
4319
4320 return -ENODEV;
4321 }
4322 EXPORT_SYMBOL(qlt_lport_register);
4323
4324 /**
4325 * qla_tgt_lport_deregister - Degister lport
4326 *
4327 * @vha: Registered scsi_qla_host pointer
4328 */
4329 void qlt_lport_deregister(struct scsi_qla_host *vha)
4330 {
4331 struct qla_hw_data *ha = vha->hw;
4332 struct Scsi_Host *sh = vha->host;
4333 /*
4334 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4335 */
4336 vha->vha_tgt.target_lport_ptr = NULL;
4337 ha->tgt.tgt_ops = NULL;
4338 /*
4339 * Release the Scsi_Host reference for the underlying qla2xxx host
4340 */
4341 scsi_host_put(sh);
4342 }
4343 EXPORT_SYMBOL(qlt_lport_deregister);
4344
4345 /* Must be called under HW lock */
4346 void qlt_set_mode(struct scsi_qla_host *vha)
4347 {
4348 struct qla_hw_data *ha = vha->hw;
4349
4350 switch (ql2x_ini_mode) {
4351 case QLA2XXX_INI_MODE_DISABLED:
4352 case QLA2XXX_INI_MODE_EXCLUSIVE:
4353 vha->host->active_mode = MODE_TARGET;
4354 break;
4355 case QLA2XXX_INI_MODE_ENABLED:
4356 vha->host->active_mode |= MODE_TARGET;
4357 break;
4358 default:
4359 break;
4360 }
4361
4362 if (ha->tgt.ini_mode_force_reverse)
4363 qla_reverse_ini_mode(vha);
4364 }
4365
4366 /* Must be called under HW lock */
4367 void qlt_clear_mode(struct scsi_qla_host *vha)
4368 {
4369 struct qla_hw_data *ha = vha->hw;
4370
4371 switch (ql2x_ini_mode) {
4372 case QLA2XXX_INI_MODE_DISABLED:
4373 vha->host->active_mode = MODE_UNKNOWN;
4374 break;
4375 case QLA2XXX_INI_MODE_EXCLUSIVE:
4376 vha->host->active_mode = MODE_INITIATOR;
4377 break;
4378 case QLA2XXX_INI_MODE_ENABLED:
4379 vha->host->active_mode &= ~MODE_TARGET;
4380 break;
4381 default:
4382 break;
4383 }
4384
4385 if (ha->tgt.ini_mode_force_reverse)
4386 qla_reverse_ini_mode(vha);
4387 }
4388
4389 /*
4390 * qla_tgt_enable_vha - NO LOCK HELD
4391 *
4392 * host_reset, bring up w/ Target Mode Enabled
4393 */
4394 void
4395 qlt_enable_vha(struct scsi_qla_host *vha)
4396 {
4397 struct qla_hw_data *ha = vha->hw;
4398 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4399 unsigned long flags;
4400 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
4401
4402 if (!tgt) {
4403 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4404 "Unable to locate qla_tgt pointer from"
4405 " struct qla_hw_data\n");
4406 dump_stack();
4407 return;
4408 }
4409
4410 spin_lock_irqsave(&ha->hardware_lock, flags);
4411 tgt->tgt_stopped = 0;
4412 qlt_set_mode(vha);
4413 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4414
4415 if (vha->vp_idx) {
4416 qla24xx_disable_vp(vha);
4417 qla24xx_enable_vp(vha);
4418 } else {
4419 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
4420 qla2xxx_wake_dpc(base_vha);
4421 qla2x00_wait_for_hba_online(base_vha);
4422 }
4423 }
4424 EXPORT_SYMBOL(qlt_enable_vha);
4425
4426 /*
4427 * qla_tgt_disable_vha - NO LOCK HELD
4428 *
4429 * Disable Target Mode and reset the adapter
4430 */
4431 void
4432 qlt_disable_vha(struct scsi_qla_host *vha)
4433 {
4434 struct qla_hw_data *ha = vha->hw;
4435 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4436 unsigned long flags;
4437
4438 if (!tgt) {
4439 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4440 "Unable to locate qla_tgt pointer from"
4441 " struct qla_hw_data\n");
4442 dump_stack();
4443 return;
4444 }
4445
4446 spin_lock_irqsave(&ha->hardware_lock, flags);
4447 qlt_clear_mode(vha);
4448 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4449
4450 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4451 qla2xxx_wake_dpc(vha);
4452 qla2x00_wait_for_hba_online(vha);
4453 }
4454
4455 /*
4456 * Called from qla_init.c:qla24xx_vport_create() contex to setup
4457 * the target mode specific struct scsi_qla_host and struct qla_hw_data
4458 * members.
4459 */
4460 void
4461 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4462 {
4463 if (!qla_tgt_mode_enabled(vha))
4464 return;
4465
4466 vha->vha_tgt.qla_tgt = NULL;
4467
4468 mutex_init(&vha->vha_tgt.tgt_mutex);
4469 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
4470
4471 qlt_clear_mode(vha);
4472
4473 /*
4474 * NOTE: Currently the value is kept the same for <24xx and
4475 * >=24xx ISPs. If it is necessary to change it,
4476 * the check should be added for specific ISPs,
4477 * assigning the value appropriately.
4478 */
4479 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4480
4481 qlt_add_target(ha, vha);
4482 }
4483
4484 void
4485 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4486 {
4487 /*
4488 * FC-4 Feature bit 0 indicates target functionality to the name server.
4489 */
4490 if (qla_tgt_mode_enabled(vha)) {
4491 if (qla_ini_mode_enabled(vha))
4492 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4493 else
4494 ct_req->req.rff_id.fc4_feature = BIT_0;
4495 } else if (qla_ini_mode_enabled(vha)) {
4496 ct_req->req.rff_id.fc4_feature = BIT_1;
4497 }
4498 }
4499
4500 /*
4501 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4502 * @ha: HA context
4503 *
4504 * Beginning of ATIO ring has initialization control block already built
4505 * by nvram config routine.
4506 *
4507 * Returns 0 on success.
4508 */
4509 void
4510 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4511 {
4512 struct qla_hw_data *ha = vha->hw;
4513 uint16_t cnt;
4514 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4515
4516 if (!qla_tgt_mode_enabled(vha))
4517 return;
4518
4519 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4520 pkt->u.raw.signature = ATIO_PROCESSED;
4521 pkt++;
4522 }
4523
4524 }
4525
4526 /*
4527 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4528 * @ha: SCSI driver HA context
4529 */
4530 void
4531 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4532 {
4533 struct qla_hw_data *ha = vha->hw;
4534 struct atio_from_isp *pkt;
4535 int cnt, i;
4536
4537 if (!vha->flags.online)
4538 return;
4539
4540 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4541 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4542 cnt = pkt->u.raw.entry_count;
4543
4544 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4545
4546 for (i = 0; i < cnt; i++) {
4547 ha->tgt.atio_ring_index++;
4548 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4549 ha->tgt.atio_ring_index = 0;
4550 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4551 } else
4552 ha->tgt.atio_ring_ptr++;
4553
4554 pkt->u.raw.signature = ATIO_PROCESSED;
4555 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4556 }
4557 wmb();
4558 }
4559
4560 /* Adjust ring index */
4561 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
4562 }
4563
4564 void
4565 qlt_24xx_config_rings(struct scsi_qla_host *vha)
4566 {
4567 struct qla_hw_data *ha = vha->hw;
4568 if (!QLA_TGT_MODE_ENABLED())
4569 return;
4570
4571 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4572 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4573 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4574
4575 if (IS_ATIO_MSIX_CAPABLE(ha)) {
4576 struct qla_msix_entry *msix = &ha->msix_entries[2];
4577 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4578
4579 icb->msix_atio = cpu_to_le16(msix->entry);
4580 ql_dbg(ql_dbg_init, vha, 0xf072,
4581 "Registering ICB vector 0x%x for atio que.\n",
4582 msix->entry);
4583 }
4584 }
4585
4586 void
4587 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4588 {
4589 struct qla_hw_data *ha = vha->hw;
4590
4591 if (qla_tgt_mode_enabled(vha)) {
4592 if (!ha->tgt.saved_set) {
4593 /* We save only once */
4594 ha->tgt.saved_exchange_count = nv->exchange_count;
4595 ha->tgt.saved_firmware_options_1 =
4596 nv->firmware_options_1;
4597 ha->tgt.saved_firmware_options_2 =
4598 nv->firmware_options_2;
4599 ha->tgt.saved_firmware_options_3 =
4600 nv->firmware_options_3;
4601 ha->tgt.saved_set = 1;
4602 }
4603
4604 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4605
4606 /* Enable target mode */
4607 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4608
4609 /* Disable ini mode, if requested */
4610 if (!qla_ini_mode_enabled(vha))
4611 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4612
4613 /* Disable Full Login after LIP */
4614 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4615 /* Enable initial LIP */
4616 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4617 /* Enable FC tapes support */
4618 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4619 /* Disable Full Login after LIP */
4620 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4621 /* Enable target PRLI control */
4622 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4623 } else {
4624 if (ha->tgt.saved_set) {
4625 nv->exchange_count = ha->tgt.saved_exchange_count;
4626 nv->firmware_options_1 =
4627 ha->tgt.saved_firmware_options_1;
4628 nv->firmware_options_2 =
4629 ha->tgt.saved_firmware_options_2;
4630 nv->firmware_options_3 =
4631 ha->tgt.saved_firmware_options_3;
4632 }
4633 return;
4634 }
4635
4636 /* out-of-order frames reassembly */
4637 nv->firmware_options_3 |= BIT_6|BIT_9;
4638
4639 if (ha->tgt.enable_class_2) {
4640 if (vha->flags.init_done)
4641 fc_host_supported_classes(vha->host) =
4642 FC_COS_CLASS2 | FC_COS_CLASS3;
4643
4644 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4645 } else {
4646 if (vha->flags.init_done)
4647 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4648
4649 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4650 }
4651 }
4652
4653 void
4654 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4655 struct init_cb_24xx *icb)
4656 {
4657 struct qla_hw_data *ha = vha->hw;
4658
4659 if (ha->tgt.node_name_set) {
4660 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4661 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4662 }
4663 }
4664
4665 void
4666 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4667 {
4668 struct qla_hw_data *ha = vha->hw;
4669
4670 if (!QLA_TGT_MODE_ENABLED())
4671 return;
4672
4673 if (qla_tgt_mode_enabled(vha)) {
4674 if (!ha->tgt.saved_set) {
4675 /* We save only once */
4676 ha->tgt.saved_exchange_count = nv->exchange_count;
4677 ha->tgt.saved_firmware_options_1 =
4678 nv->firmware_options_1;
4679 ha->tgt.saved_firmware_options_2 =
4680 nv->firmware_options_2;
4681 ha->tgt.saved_firmware_options_3 =
4682 nv->firmware_options_3;
4683 ha->tgt.saved_set = 1;
4684 }
4685
4686 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4687
4688 /* Enable target mode */
4689 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4690
4691 /* Disable ini mode, if requested */
4692 if (!qla_ini_mode_enabled(vha))
4693 nv->firmware_options_1 |=
4694 __constant_cpu_to_le32(BIT_5);
4695
4696 /* Disable Full Login after LIP */
4697 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4698 /* Enable initial LIP */
4699 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4700 /* Enable FC tapes support */
4701 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4702 /* Disable Full Login after LIP */
4703 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4704 /* Enable target PRLI control */
4705 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4706 } else {
4707 if (ha->tgt.saved_set) {
4708 nv->exchange_count = ha->tgt.saved_exchange_count;
4709 nv->firmware_options_1 =
4710 ha->tgt.saved_firmware_options_1;
4711 nv->firmware_options_2 =
4712 ha->tgt.saved_firmware_options_2;
4713 nv->firmware_options_3 =
4714 ha->tgt.saved_firmware_options_3;
4715 }
4716 return;
4717 }
4718
4719 /* out-of-order frames reassembly */
4720 nv->firmware_options_3 |= BIT_6|BIT_9;
4721
4722 if (ha->tgt.enable_class_2) {
4723 if (vha->flags.init_done)
4724 fc_host_supported_classes(vha->host) =
4725 FC_COS_CLASS2 | FC_COS_CLASS3;
4726
4727 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4728 } else {
4729 if (vha->flags.init_done)
4730 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4731
4732 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4733 }
4734 }
4735
4736 void
4737 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4738 struct init_cb_81xx *icb)
4739 {
4740 struct qla_hw_data *ha = vha->hw;
4741
4742 if (!QLA_TGT_MODE_ENABLED())
4743 return;
4744
4745 if (ha->tgt.node_name_set) {
4746 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4747 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4748 }
4749 }
4750
4751 void
4752 qlt_83xx_iospace_config(struct qla_hw_data *ha)
4753 {
4754 if (!QLA_TGT_MODE_ENABLED())
4755 return;
4756
4757 ha->msix_count += 1; /* For ATIO Q */
4758 }
4759
4760 int
4761 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4762 struct sts_entry_24xx *pkt)
4763 {
4764 switch (pkt->entry_type) {
4765 case ABTS_RECV_24XX:
4766 case ABTS_RESP_24XX:
4767 case CTIO_TYPE7:
4768 case NOTIFY_ACK_TYPE:
4769 return 1;
4770 default:
4771 return 0;
4772 }
4773 }
4774
4775 void
4776 qlt_modify_vp_config(struct scsi_qla_host *vha,
4777 struct vp_config_entry_24xx *vpmod)
4778 {
4779 if (qla_tgt_mode_enabled(vha))
4780 vpmod->options_idx1 &= ~BIT_5;
4781 /* Disable ini mode, if requested */
4782 if (!qla_ini_mode_enabled(vha))
4783 vpmod->options_idx1 &= ~BIT_4;
4784 }
4785
4786 void
4787 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4788 {
4789 if (!QLA_TGT_MODE_ENABLED())
4790 return;
4791
4792 if (ha->mqenable || IS_QLA83XX(ha)) {
4793 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4794 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4795 } else {
4796 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4797 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4798 }
4799
4800 mutex_init(&base_vha->vha_tgt.tgt_mutex);
4801 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
4802 qlt_clear_mode(base_vha);
4803 }
4804
4805 irqreturn_t
4806 qla83xx_msix_atio_q(int irq, void *dev_id)
4807 {
4808 struct rsp_que *rsp;
4809 scsi_qla_host_t *vha;
4810 struct qla_hw_data *ha;
4811 unsigned long flags;
4812
4813 rsp = (struct rsp_que *) dev_id;
4814 ha = rsp->hw;
4815 vha = pci_get_drvdata(ha->pdev);
4816
4817 spin_lock_irqsave(&ha->hardware_lock, flags);
4818
4819 qlt_24xx_process_atio_queue(vha);
4820 qla24xx_process_response_queue(vha, rsp);
4821
4822 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4823
4824 return IRQ_HANDLED;
4825 }
4826
4827 int
4828 qlt_mem_alloc(struct qla_hw_data *ha)
4829 {
4830 if (!QLA_TGT_MODE_ENABLED())
4831 return 0;
4832
4833 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4834 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4835 if (!ha->tgt.tgt_vp_map)
4836 return -ENOMEM;
4837
4838 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4839 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4840 &ha->tgt.atio_dma, GFP_KERNEL);
4841 if (!ha->tgt.atio_ring) {
4842 kfree(ha->tgt.tgt_vp_map);
4843 return -ENOMEM;
4844 }
4845 return 0;
4846 }
4847
4848 void
4849 qlt_mem_free(struct qla_hw_data *ha)
4850 {
4851 if (!QLA_TGT_MODE_ENABLED())
4852 return;
4853
4854 if (ha->tgt.atio_ring) {
4855 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4856 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4857 ha->tgt.atio_dma);
4858 }
4859 kfree(ha->tgt.tgt_vp_map);
4860 }
4861
4862 /* vport_slock to be held by the caller */
4863 void
4864 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4865 {
4866 if (!QLA_TGT_MODE_ENABLED())
4867 return;
4868
4869 switch (cmd) {
4870 case SET_VP_IDX:
4871 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4872 break;
4873 case SET_AL_PA:
4874 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4875 break;
4876 case RESET_VP_IDX:
4877 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4878 break;
4879 case RESET_AL_PA:
4880 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4881 break;
4882 }
4883 }
4884
4885 static int __init qlt_parse_ini_mode(void)
4886 {
4887 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4888 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4889 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4890 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4891 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4892 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4893 else
4894 return false;
4895
4896 return true;
4897 }
4898
4899 int __init qlt_init(void)
4900 {
4901 int ret;
4902
4903 if (!qlt_parse_ini_mode()) {
4904 ql_log(ql_log_fatal, NULL, 0xe06b,
4905 "qlt_parse_ini_mode() failed\n");
4906 return -EINVAL;
4907 }
4908
4909 if (!QLA_TGT_MODE_ENABLED())
4910 return 0;
4911
4912 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4913 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4914 NULL);
4915 if (!qla_tgt_cmd_cachep) {
4916 ql_log(ql_log_fatal, NULL, 0xe06c,
4917 "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4918 return -ENOMEM;
4919 }
4920
4921 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4922 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4923 qla_tgt_mgmt_cmd), 0, NULL);
4924 if (!qla_tgt_mgmt_cmd_cachep) {
4925 ql_log(ql_log_fatal, NULL, 0xe06d,
4926 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4927 ret = -ENOMEM;
4928 goto out;
4929 }
4930
4931 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4932 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4933 if (!qla_tgt_mgmt_cmd_mempool) {
4934 ql_log(ql_log_fatal, NULL, 0xe06e,
4935 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4936 ret = -ENOMEM;
4937 goto out_mgmt_cmd_cachep;
4938 }
4939
4940 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4941 if (!qla_tgt_wq) {
4942 ql_log(ql_log_fatal, NULL, 0xe06f,
4943 "alloc_workqueue for qla_tgt_wq failed\n");
4944 ret = -ENOMEM;
4945 goto out_cmd_mempool;
4946 }
4947 /*
4948 * Return 1 to signal that initiator-mode is being disabled
4949 */
4950 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4951
4952 out_cmd_mempool:
4953 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4954 out_mgmt_cmd_cachep:
4955 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4956 out:
4957 kmem_cache_destroy(qla_tgt_cmd_cachep);
4958 return ret;
4959 }
4960
4961 void qlt_exit(void)
4962 {
4963 if (!QLA_TGT_MODE_ENABLED())
4964 return;
4965
4966 destroy_workqueue(qla_tgt_wq);
4967 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4968 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4969 kmem_cache_destroy(qla_tgt_cmd_cachep);
4970 }
Linux for the MCST Elbrus 2000 architecture