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KVM: x86: zero apic_arb_prio on reset
[deliverable/linux.git] / drivers / scsi / qla2xxx / qla_target.c
1 /*
2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
3 *
4 * based on qla2x00t.c code:
5 *
6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
7 * Copyright (C) 2004 - 2005 Leonid Stoljar
8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
9 * Copyright (C) 2006 - 2010 ID7 Ltd.
10 *
11 * Forward port and refactoring to modern qla2xxx and target/configfs
12 *
13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation, version 2
18 * of the License.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 */
25
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/blkdev.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/delay.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <asm/unaligned.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_tcq.h>
39 #include <target/target_core_base.h>
40 #include <target/target_core_fabric.h>
41
42 #include "qla_def.h"
43 #include "qla_target.h"
44
45 static int ql2xtgt_tape_enable;
46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
48 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
49
50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
51 module_param(qlini_mode, charp, S_IRUGO);
52 MODULE_PARM_DESC(qlini_mode,
53 "Determines when initiator mode will be enabled. Possible values: "
54 "\"exclusive\" - initiator mode will be enabled on load, "
55 "disabled on enabling target mode and then on disabling target mode "
56 "enabled back; "
57 "\"disabled\" - initiator mode will never be enabled; "
58 "\"enabled\" (default) - initiator mode will always stay enabled.");
59
60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
61
62 static int temp_sam_status = SAM_STAT_BUSY;
63
64 /*
65 * From scsi/fc/fc_fcp.h
66 */
67 enum fcp_resp_rsp_codes {
68 FCP_TMF_CMPL = 0,
69 FCP_DATA_LEN_INVALID = 1,
70 FCP_CMND_FIELDS_INVALID = 2,
71 FCP_DATA_PARAM_MISMATCH = 3,
72 FCP_TMF_REJECTED = 4,
73 FCP_TMF_FAILED = 5,
74 FCP_TMF_INVALID_LUN = 9,
75 };
76
77 /*
78 * fc_pri_ta from scsi/fc/fc_fcp.h
79 */
80 #define FCP_PTA_SIMPLE 0 /* simple task attribute */
81 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */
82 #define FCP_PTA_ORDERED 2 /* ordered task attribute */
83 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */
84 #define FCP_PTA_MASK 7 /* mask for task attribute field */
85 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */
86 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */
87
88 /*
89 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
90 * must be called under HW lock and could unlock/lock it inside.
91 * It isn't an issue, since in the current implementation on the time when
92 * those functions are called:
93 *
94 * - Either context is IRQ and only IRQ handler can modify HW data,
95 * including rings related fields,
96 *
97 * - Or access to target mode variables from struct qla_tgt doesn't
98 * cross those functions boundaries, except tgt_stop, which
99 * additionally protected by irq_cmd_count.
100 */
101 /* Predefs for callbacks handed to qla2xxx LLD */
102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
103 struct atio_from_isp *pkt);
104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
106 int fn, void *iocb, int flags);
107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
108 *cmd, struct atio_from_isp *atio, int ha_locked);
109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
110 struct qla_tgt_srr_imm *imm, int ha_lock);
111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
112 struct qla_tgt_cmd *cmd);
113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
114 struct atio_from_isp *atio, uint16_t status, int qfull);
115 static void qlt_disable_vha(struct scsi_qla_host *vha);
116 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
117 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
118 struct imm_ntfy_from_isp *ntfy,
119 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
120 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
121 /*
122 * Global Variables
123 */
124 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
125 static mempool_t *qla_tgt_mgmt_cmd_mempool;
126 static struct workqueue_struct *qla_tgt_wq;
127 static DEFINE_MUTEX(qla_tgt_mutex);
128 static LIST_HEAD(qla_tgt_glist);
129
130 /* This API intentionally takes dest as a parameter, rather than returning
131 * int value to avoid caller forgetting to issue wmb() after the store */
132 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
133 {
134 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
135 *dest = atomic_inc_return(&base_vha->generation_tick);
136 /* memory barrier */
137 wmb();
138 }
139
140 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
141 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
142 struct qla_tgt *tgt,
143 const uint8_t *port_name)
144 {
145 struct qla_tgt_sess *sess;
146
147 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
148 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
149 return sess;
150 }
151
152 return NULL;
153 }
154
155 /* Might release hw lock, then reaquire!! */
156 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
157 {
158 /* Send marker if required */
159 if (unlikely(vha->marker_needed != 0)) {
160 int rc = qla2x00_issue_marker(vha, vha_locked);
161 if (rc != QLA_SUCCESS) {
162 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
163 "qla_target(%d): issue_marker() failed\n",
164 vha->vp_idx);
165 }
166 return rc;
167 }
168 return QLA_SUCCESS;
169 }
170
171 static inline
172 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
173 uint8_t *d_id)
174 {
175 struct qla_hw_data *ha = vha->hw;
176 uint8_t vp_idx;
177
178 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
179 return NULL;
180
181 if (vha->d_id.b.al_pa == d_id[2])
182 return vha;
183
184 BUG_ON(ha->tgt.tgt_vp_map == NULL);
185 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
186 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
187 return ha->tgt.tgt_vp_map[vp_idx].vha;
188
189 return NULL;
190 }
191
192 static inline
193 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
194 uint16_t vp_idx)
195 {
196 struct qla_hw_data *ha = vha->hw;
197
198 if (vha->vp_idx == vp_idx)
199 return vha;
200
201 BUG_ON(ha->tgt.tgt_vp_map == NULL);
202 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
203 return ha->tgt.tgt_vp_map[vp_idx].vha;
204
205 return NULL;
206 }
207
208 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
209 {
210 unsigned long flags;
211
212 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
213
214 vha->hw->tgt.num_pend_cmds++;
215 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
216 vha->hw->qla_stats.stat_max_pend_cmds =
217 vha->hw->tgt.num_pend_cmds;
218 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
219 }
220 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
221 {
222 unsigned long flags;
223
224 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
225 vha->hw->tgt.num_pend_cmds--;
226 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
227 }
228
229 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
230 struct atio_from_isp *atio)
231 {
232 ql_dbg(ql_dbg_tgt, vha, 0xe072,
233 "%s: qla_target(%d): type %x ox_id %04x\n",
234 __func__, vha->vp_idx, atio->u.raw.entry_type,
235 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
236
237 switch (atio->u.raw.entry_type) {
238 case ATIO_TYPE7:
239 {
240 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
241 atio->u.isp24.fcp_hdr.d_id);
242 if (unlikely(NULL == host)) {
243 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
244 "qla_target(%d): Received ATIO_TYPE7 "
245 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
246 atio->u.isp24.fcp_hdr.d_id[0],
247 atio->u.isp24.fcp_hdr.d_id[1],
248 atio->u.isp24.fcp_hdr.d_id[2]);
249 break;
250 }
251 qlt_24xx_atio_pkt(host, atio);
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 *)atio;
260
261 if ((entry->u.isp24.vp_index != 0xFF) &&
262 (entry->u.isp24.nport_handle != 0xFFFF)) {
263 host = qlt_find_host_by_vp_idx(vha,
264 entry->u.isp24.vp_index);
265 if (unlikely(!host)) {
266 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
267 "qla_target(%d): Received "
268 "ATIO (IMMED_NOTIFY_TYPE) "
269 "with unknown vp_index %d\n",
270 vha->vp_idx, entry->u.isp24.vp_index);
271 break;
272 }
273 }
274 qlt_24xx_atio_pkt(host, atio);
275 break;
276 }
277
278 default:
279 ql_dbg(ql_dbg_tgt, vha, 0xe040,
280 "qla_target(%d): Received unknown ATIO atio "
281 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
282 break;
283 }
284
285 return;
286 }
287
288 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
289 {
290 switch (pkt->entry_type) {
291 case CTIO_CRC2:
292 ql_dbg(ql_dbg_tgt, vha, 0xe073,
293 "qla_target(%d):%s: CRC2 Response pkt\n",
294 vha->vp_idx, __func__);
295 case CTIO_TYPE7:
296 {
297 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
298 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
299 entry->vp_index);
300 if (unlikely(!host)) {
301 ql_dbg(ql_dbg_tgt, vha, 0xe041,
302 "qla_target(%d): Response pkt (CTIO_TYPE7) "
303 "received, with unknown vp_index %d\n",
304 vha->vp_idx, entry->vp_index);
305 break;
306 }
307 qlt_response_pkt(host, pkt);
308 break;
309 }
310
311 case IMMED_NOTIFY_TYPE:
312 {
313 struct scsi_qla_host *host = vha;
314 struct imm_ntfy_from_isp *entry =
315 (struct imm_ntfy_from_isp *)pkt;
316
317 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
318 if (unlikely(!host)) {
319 ql_dbg(ql_dbg_tgt, vha, 0xe042,
320 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
321 "received, with unknown vp_index %d\n",
322 vha->vp_idx, entry->u.isp24.vp_index);
323 break;
324 }
325 qlt_response_pkt(host, pkt);
326 break;
327 }
328
329 case NOTIFY_ACK_TYPE:
330 {
331 struct scsi_qla_host *host = vha;
332 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
333
334 if (0xFF != entry->u.isp24.vp_index) {
335 host = qlt_find_host_by_vp_idx(vha,
336 entry->u.isp24.vp_index);
337 if (unlikely(!host)) {
338 ql_dbg(ql_dbg_tgt, vha, 0xe043,
339 "qla_target(%d): Response "
340 "pkt (NOTIFY_ACK_TYPE) "
341 "received, with unknown "
342 "vp_index %d\n", vha->vp_idx,
343 entry->u.isp24.vp_index);
344 break;
345 }
346 }
347 qlt_response_pkt(host, pkt);
348 break;
349 }
350
351 case ABTS_RECV_24XX:
352 {
353 struct abts_recv_from_24xx *entry =
354 (struct abts_recv_from_24xx *)pkt;
355 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
356 entry->vp_index);
357 if (unlikely(!host)) {
358 ql_dbg(ql_dbg_tgt, vha, 0xe044,
359 "qla_target(%d): Response pkt "
360 "(ABTS_RECV_24XX) received, with unknown "
361 "vp_index %d\n", vha->vp_idx, entry->vp_index);
362 break;
363 }
364 qlt_response_pkt(host, pkt);
365 break;
366 }
367
368 case ABTS_RESP_24XX:
369 {
370 struct abts_resp_to_24xx *entry =
371 (struct abts_resp_to_24xx *)pkt;
372 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
373 entry->vp_index);
374 if (unlikely(!host)) {
375 ql_dbg(ql_dbg_tgt, vha, 0xe045,
376 "qla_target(%d): Response pkt "
377 "(ABTS_RECV_24XX) received, with unknown "
378 "vp_index %d\n", vha->vp_idx, entry->vp_index);
379 break;
380 }
381 qlt_response_pkt(host, pkt);
382 break;
383 }
384
385 default:
386 qlt_response_pkt(vha, pkt);
387 break;
388 }
389
390 }
391
392 static void qlt_free_session_done(struct work_struct *work)
393 {
394 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
395 free_work);
396 struct qla_tgt *tgt = sess->tgt;
397 struct scsi_qla_host *vha = sess->vha;
398 struct qla_hw_data *ha = vha->hw;
399 unsigned long flags;
400 bool logout_started = false;
401 fc_port_t fcport;
402
403 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
404 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
405 " s_id %02x:%02x:%02x logout %d keep %d plogi %d\n",
406 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
407 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
408 sess->logout_on_delete, sess->keep_nport_handle,
409 sess->plogi_ack_needed);
410
411 BUG_ON(!tgt);
412
413 if (sess->logout_on_delete) {
414 int rc;
415
416 memset(&fcport, 0, sizeof(fcport));
417 fcport.loop_id = sess->loop_id;
418 fcport.d_id = sess->s_id;
419 memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
420 fcport.vha = vha;
421 fcport.tgt_session = sess;
422
423 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
424 if (rc != QLA_SUCCESS)
425 ql_log(ql_log_warn, vha, 0xf085,
426 "Schedule logo failed sess %p rc %d\n",
427 sess, rc);
428 else
429 logout_started = true;
430 }
431
432 /*
433 * Release the target session for FC Nexus from fabric module code.
434 */
435 if (sess->se_sess != NULL)
436 ha->tgt.tgt_ops->free_session(sess);
437
438 if (logout_started) {
439 bool traced = false;
440
441 while (!ACCESS_ONCE(sess->logout_completed)) {
442 if (!traced) {
443 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
444 "%s: waiting for sess %p logout\n",
445 __func__, sess);
446 traced = true;
447 }
448 msleep(100);
449 }
450
451 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
452 "%s: sess %p logout completed\n",
453 __func__, sess);
454 }
455
456 spin_lock_irqsave(&ha->hardware_lock, flags);
457
458 if (sess->plogi_ack_needed)
459 qlt_send_notify_ack(vha, &sess->tm_iocb,
460 0, 0, 0, 0, 0, 0);
461
462 list_del(&sess->sess_list_entry);
463
464 spin_unlock_irqrestore(&ha->hardware_lock, flags);
465
466 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
467 "Unregistration of sess %p finished\n", sess);
468
469 kfree(sess);
470 /*
471 * We need to protect against race, when tgt is freed before or
472 * inside wake_up()
473 */
474 tgt->sess_count--;
475 if (tgt->sess_count == 0)
476 wake_up_all(&tgt->waitQ);
477 }
478
479 /* ha->hardware_lock supposed to be held on entry */
480 void qlt_unreg_sess(struct qla_tgt_sess *sess)
481 {
482 struct scsi_qla_host *vha = sess->vha;
483
484 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
485
486 if (!list_empty(&sess->del_list_entry))
487 list_del_init(&sess->del_list_entry);
488 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
489
490 INIT_WORK(&sess->free_work, qlt_free_session_done);
491 schedule_work(&sess->free_work);
492 }
493 EXPORT_SYMBOL(qlt_unreg_sess);
494
495 /* ha->hardware_lock supposed to be held on entry */
496 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
497 {
498 struct qla_hw_data *ha = vha->hw;
499 struct qla_tgt_sess *sess = NULL;
500 uint32_t unpacked_lun, lun = 0;
501 uint16_t loop_id;
502 int res = 0;
503 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
504 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
505
506 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
507 if (loop_id == 0xFFFF) {
508 /* Global event */
509 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
510 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
511 #if 0 /* FIXME: do we need to choose a session here? */
512 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
513 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
514 typeof(*sess), sess_list_entry);
515 switch (mcmd) {
516 case QLA_TGT_NEXUS_LOSS_SESS:
517 mcmd = QLA_TGT_NEXUS_LOSS;
518 break;
519 case QLA_TGT_ABORT_ALL_SESS:
520 mcmd = QLA_TGT_ABORT_ALL;
521 break;
522 case QLA_TGT_NEXUS_LOSS:
523 case QLA_TGT_ABORT_ALL:
524 break;
525 default:
526 ql_dbg(ql_dbg_tgt, vha, 0xe046,
527 "qla_target(%d): Not allowed "
528 "command %x in %s", vha->vp_idx,
529 mcmd, __func__);
530 sess = NULL;
531 break;
532 }
533 } else
534 sess = NULL;
535 #endif
536 } else {
537 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
538 }
539
540 ql_dbg(ql_dbg_tgt, vha, 0xe000,
541 "Using sess for qla_tgt_reset: %p\n", sess);
542 if (!sess) {
543 res = -ESRCH;
544 return res;
545 }
546
547 ql_dbg(ql_dbg_tgt, vha, 0xe047,
548 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
549 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
550 mcmd, loop_id);
551
552 lun = a->u.isp24.fcp_cmnd.lun;
553 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
554
555 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
556 iocb, QLA24XX_MGMT_SEND_NACK);
557 }
558
559 /* ha->hardware_lock supposed to be held on entry */
560 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
561 bool immediate)
562 {
563 struct qla_tgt *tgt = sess->tgt;
564 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
565
566 if (sess->deleted) {
567 /* Upgrade to unconditional deletion in case it was temporary */
568 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
569 list_del(&sess->del_list_entry);
570 else
571 return;
572 }
573
574 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
575 "Scheduling sess %p for deletion\n", sess);
576
577 if (immediate) {
578 dev_loss_tmo = 0;
579 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
580 list_add(&sess->del_list_entry, &tgt->del_sess_list);
581 } else {
582 sess->deleted = QLA_SESS_DELETION_PENDING;
583 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
584 }
585
586 sess->expires = jiffies + dev_loss_tmo * HZ;
587
588 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
589 "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
590 " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
591 sess->vha->vp_idx, sess->port_name, sess->loop_id,
592 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
593 dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
594 sess->generation);
595
596 if (immediate)
597 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
598 else
599 schedule_delayed_work(&tgt->sess_del_work,
600 sess->expires - jiffies);
601 }
602
603 /* ha->hardware_lock supposed to be held on entry */
604 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
605 {
606 struct qla_tgt_sess *sess;
607
608 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
609 qlt_schedule_sess_for_deletion(sess, true);
610
611 /* At this point tgt could be already dead */
612 }
613
614 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
615 uint16_t *loop_id)
616 {
617 struct qla_hw_data *ha = vha->hw;
618 dma_addr_t gid_list_dma;
619 struct gid_list_info *gid_list;
620 char *id_iter;
621 int res, rc, i;
622 uint16_t entries;
623
624 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
625 &gid_list_dma, GFP_KERNEL);
626 if (!gid_list) {
627 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
628 "qla_target(%d): DMA Alloc failed of %u\n",
629 vha->vp_idx, qla2x00_gid_list_size(ha));
630 return -ENOMEM;
631 }
632
633 /* Get list of logged in devices */
634 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
635 if (rc != QLA_SUCCESS) {
636 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
637 "qla_target(%d): get_id_list() failed: %x\n",
638 vha->vp_idx, rc);
639 res = -1;
640 goto out_free_id_list;
641 }
642
643 id_iter = (char *)gid_list;
644 res = -1;
645 for (i = 0; i < entries; i++) {
646 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
647 if ((gid->al_pa == s_id[2]) &&
648 (gid->area == s_id[1]) &&
649 (gid->domain == s_id[0])) {
650 *loop_id = le16_to_cpu(gid->loop_id);
651 res = 0;
652 break;
653 }
654 id_iter += ha->gid_list_info_size;
655 }
656
657 out_free_id_list:
658 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
659 gid_list, gid_list_dma);
660 return res;
661 }
662
663 /* ha->hardware_lock supposed to be held on entry */
664 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
665 {
666 BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
667
668 list_del_init(&sess->del_list_entry);
669 sess->deleted = 0;
670 }
671
672 static void qlt_del_sess_work_fn(struct delayed_work *work)
673 {
674 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
675 sess_del_work);
676 struct scsi_qla_host *vha = tgt->vha;
677 struct qla_hw_data *ha = vha->hw;
678 struct qla_tgt_sess *sess;
679 unsigned long flags, elapsed;
680
681 spin_lock_irqsave(&ha->hardware_lock, flags);
682 while (!list_empty(&tgt->del_sess_list)) {
683 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
684 del_list_entry);
685 elapsed = jiffies;
686 if (time_after_eq(elapsed, sess->expires)) {
687 /* No turning back */
688 list_del_init(&sess->del_list_entry);
689 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
690
691 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
692 "Timeout: sess %p about to be deleted\n",
693 sess);
694 ha->tgt.tgt_ops->shutdown_sess(sess);
695 ha->tgt.tgt_ops->put_sess(sess);
696 } else {
697 schedule_delayed_work(&tgt->sess_del_work,
698 sess->expires - elapsed);
699 break;
700 }
701 }
702 spin_unlock_irqrestore(&ha->hardware_lock, flags);
703 }
704
705 /*
706 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
707 * Caller must put it.
708 */
709 static struct qla_tgt_sess *qlt_create_sess(
710 struct scsi_qla_host *vha,
711 fc_port_t *fcport,
712 bool local)
713 {
714 struct qla_hw_data *ha = vha->hw;
715 struct qla_tgt_sess *sess;
716 unsigned long flags;
717 unsigned char be_sid[3];
718
719 /* Check to avoid double sessions */
720 spin_lock_irqsave(&ha->hardware_lock, flags);
721 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
722 sess_list_entry) {
723 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
724 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
725 "Double sess %p found (s_id %x:%x:%x, "
726 "loop_id %d), updating to d_id %x:%x:%x, "
727 "loop_id %d", sess, sess->s_id.b.domain,
728 sess->s_id.b.al_pa, sess->s_id.b.area,
729 sess->loop_id, fcport->d_id.b.domain,
730 fcport->d_id.b.al_pa, fcport->d_id.b.area,
731 fcport->loop_id);
732
733 /* Cannot undelete at this point */
734 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
735 spin_unlock_irqrestore(&ha->hardware_lock,
736 flags);
737 return NULL;
738 }
739
740 if (sess->deleted)
741 qlt_undelete_sess(sess);
742
743 kref_get(&sess->se_sess->sess_kref);
744 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
745 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
746
747 if (sess->local && !local)
748 sess->local = 0;
749
750 qlt_do_generation_tick(vha, &sess->generation);
751
752 spin_unlock_irqrestore(&ha->hardware_lock, flags);
753
754 return sess;
755 }
756 }
757 spin_unlock_irqrestore(&ha->hardware_lock, flags);
758
759 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
760 if (!sess) {
761 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
762 "qla_target(%u): session allocation failed, all commands "
763 "from port %8phC will be refused", vha->vp_idx,
764 fcport->port_name);
765
766 return NULL;
767 }
768 sess->tgt = vha->vha_tgt.qla_tgt;
769 sess->vha = vha;
770 sess->s_id = fcport->d_id;
771 sess->loop_id = fcport->loop_id;
772 sess->local = local;
773 INIT_LIST_HEAD(&sess->del_list_entry);
774
775 /* Under normal circumstances we want to logout from firmware when
776 * session eventually ends and release corresponding nport handle.
777 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
778 * code will adjust these flags as necessary. */
779 sess->logout_on_delete = 1;
780 sess->keep_nport_handle = 0;
781
782 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
783 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
784 sess, vha->vha_tgt.qla_tgt);
785
786 be_sid[0] = sess->s_id.b.domain;
787 be_sid[1] = sess->s_id.b.area;
788 be_sid[2] = sess->s_id.b.al_pa;
789 /*
790 * Determine if this fc_port->port_name is allowed to access
791 * target mode using explict NodeACLs+MappedLUNs, or using
792 * TPG demo mode. If this is successful a target mode FC nexus
793 * is created.
794 */
795 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
796 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
797 kfree(sess);
798 return NULL;
799 }
800 /*
801 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
802 * access across ->hardware_lock reaquire.
803 */
804 kref_get(&sess->se_sess->sess_kref);
805
806 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
807 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
808 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
809
810 spin_lock_irqsave(&ha->hardware_lock, flags);
811 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
812 vha->vha_tgt.qla_tgt->sess_count++;
813 qlt_do_generation_tick(vha, &sess->generation);
814 spin_unlock_irqrestore(&ha->hardware_lock, flags);
815
816 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
817 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
818 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
819 vha->vp_idx, local ? "local " : "", fcport->port_name,
820 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
821 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
822
823 return sess;
824 }
825
826 /*
827 * Called from qla2x00_reg_remote_port()
828 */
829 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
830 {
831 struct qla_hw_data *ha = vha->hw;
832 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
833 struct qla_tgt_sess *sess;
834 unsigned long flags;
835
836 if (!vha->hw->tgt.tgt_ops)
837 return;
838
839 if (!tgt || (fcport->port_type != FCT_INITIATOR))
840 return;
841
842 if (qla_ini_mode_enabled(vha))
843 return;
844
845 spin_lock_irqsave(&ha->hardware_lock, flags);
846 if (tgt->tgt_stop) {
847 spin_unlock_irqrestore(&ha->hardware_lock, flags);
848 return;
849 }
850 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
851 if (!sess) {
852 spin_unlock_irqrestore(&ha->hardware_lock, flags);
853
854 mutex_lock(&vha->vha_tgt.tgt_mutex);
855 sess = qlt_create_sess(vha, fcport, false);
856 mutex_unlock(&vha->vha_tgt.tgt_mutex);
857
858 spin_lock_irqsave(&ha->hardware_lock, flags);
859 } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
860 /* Point of no return */
861 spin_unlock_irqrestore(&ha->hardware_lock, flags);
862 return;
863 } else {
864 kref_get(&sess->se_sess->sess_kref);
865
866 if (sess->deleted) {
867 qlt_undelete_sess(sess);
868
869 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
870 "qla_target(%u): %ssession for port %8phC "
871 "(loop ID %d) reappeared\n", vha->vp_idx,
872 sess->local ? "local " : "", sess->port_name,
873 sess->loop_id);
874
875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
876 "Reappeared sess %p\n", sess);
877 }
878 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
879 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
880 }
881
882 if (sess && sess->local) {
883 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
884 "qla_target(%u): local session for "
885 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
886 fcport->port_name, sess->loop_id);
887 sess->local = 0;
888 }
889 ha->tgt.tgt_ops->put_sess(sess);
890 spin_unlock_irqrestore(&ha->hardware_lock, flags);
891 }
892
893 /*
894 * max_gen - specifies maximum session generation
895 * at which this deletion requestion is still valid
896 */
897 void
898 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
899 {
900 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
901 struct qla_tgt_sess *sess;
902
903 if (!vha->hw->tgt.tgt_ops)
904 return;
905
906 if (!tgt)
907 return;
908
909 if (tgt->tgt_stop) {
910 return;
911 }
912 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
913 if (!sess) {
914 return;
915 }
916
917 if (max_gen - sess->generation < 0) {
918 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
919 "Ignoring stale deletion request for se_sess %p / sess %p"
920 " for port %8phC, req_gen %d, sess_gen %d\n",
921 sess->se_sess, sess, sess->port_name, max_gen,
922 sess->generation);
923 return;
924 }
925
926 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
927
928 sess->local = 1;
929 qlt_schedule_sess_for_deletion(sess, false);
930 }
931
932 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
933 {
934 struct qla_hw_data *ha = tgt->ha;
935 unsigned long flags;
936 int res;
937 /*
938 * We need to protect against race, when tgt is freed before or
939 * inside wake_up()
940 */
941 spin_lock_irqsave(&ha->hardware_lock, flags);
942 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
943 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
944 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
945 res = (tgt->sess_count == 0);
946 spin_unlock_irqrestore(&ha->hardware_lock, flags);
947
948 return res;
949 }
950
951 /* Called by tcm_qla2xxx configfs code */
952 int qlt_stop_phase1(struct qla_tgt *tgt)
953 {
954 struct scsi_qla_host *vha = tgt->vha;
955 struct qla_hw_data *ha = tgt->ha;
956 unsigned long flags;
957
958 mutex_lock(&qla_tgt_mutex);
959 if (!vha->fc_vport) {
960 struct Scsi_Host *sh = vha->host;
961 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
962 bool npiv_vports;
963
964 spin_lock_irqsave(sh->host_lock, flags);
965 npiv_vports = (fc_host->npiv_vports_inuse);
966 spin_unlock_irqrestore(sh->host_lock, flags);
967
968 if (npiv_vports) {
969 mutex_unlock(&qla_tgt_mutex);
970 return -EPERM;
971 }
972 }
973 if (tgt->tgt_stop || tgt->tgt_stopped) {
974 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
975 "Already in tgt->tgt_stop or tgt_stopped state\n");
976 mutex_unlock(&qla_tgt_mutex);
977 return -EPERM;
978 }
979
980 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
981 vha->host_no, vha);
982 /*
983 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
984 * Lock is needed, because we still can get an incoming packet.
985 */
986 mutex_lock(&vha->vha_tgt.tgt_mutex);
987 spin_lock_irqsave(&ha->hardware_lock, flags);
988 tgt->tgt_stop = 1;
989 qlt_clear_tgt_db(tgt);
990 spin_unlock_irqrestore(&ha->hardware_lock, flags);
991 mutex_unlock(&vha->vha_tgt.tgt_mutex);
992 mutex_unlock(&qla_tgt_mutex);
993
994 flush_delayed_work(&tgt->sess_del_work);
995
996 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
997 "Waiting for sess works (tgt %p)", tgt);
998 spin_lock_irqsave(&tgt->sess_work_lock, flags);
999 while (!list_empty(&tgt->sess_works_list)) {
1000 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1001 flush_scheduled_work();
1002 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1003 }
1004 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1005
1006 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1007 "Waiting for tgt %p: list_empty(sess_list)=%d "
1008 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1009 tgt->sess_count);
1010
1011 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1012
1013 /* Big hammer */
1014 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1015 qlt_disable_vha(vha);
1016
1017 /* Wait for sessions to clear out (just in case) */
1018 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1019 return 0;
1020 }
1021 EXPORT_SYMBOL(qlt_stop_phase1);
1022
1023 /* Called by tcm_qla2xxx configfs code */
1024 void qlt_stop_phase2(struct qla_tgt *tgt)
1025 {
1026 struct qla_hw_data *ha = tgt->ha;
1027 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1028 unsigned long flags;
1029
1030 if (tgt->tgt_stopped) {
1031 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1032 "Already in tgt->tgt_stopped state\n");
1033 dump_stack();
1034 return;
1035 }
1036
1037 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1038 "Waiting for %d IRQ commands to complete (tgt %p)",
1039 tgt->irq_cmd_count, tgt);
1040
1041 mutex_lock(&vha->vha_tgt.tgt_mutex);
1042 spin_lock_irqsave(&ha->hardware_lock, flags);
1043 while (tgt->irq_cmd_count != 0) {
1044 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1045 udelay(2);
1046 spin_lock_irqsave(&ha->hardware_lock, flags);
1047 }
1048 tgt->tgt_stop = 0;
1049 tgt->tgt_stopped = 1;
1050 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1051 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1052
1053 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1054 tgt);
1055 }
1056 EXPORT_SYMBOL(qlt_stop_phase2);
1057
1058 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1059 static void qlt_release(struct qla_tgt *tgt)
1060 {
1061 scsi_qla_host_t *vha = tgt->vha;
1062
1063 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1064 qlt_stop_phase2(tgt);
1065
1066 vha->vha_tgt.qla_tgt = NULL;
1067
1068 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1069 "Release of tgt %p finished\n", tgt);
1070
1071 kfree(tgt);
1072 }
1073
1074 /* ha->hardware_lock supposed to be held on entry */
1075 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1076 const void *param, unsigned int param_size)
1077 {
1078 struct qla_tgt_sess_work_param *prm;
1079 unsigned long flags;
1080
1081 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1082 if (!prm) {
1083 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1084 "qla_target(%d): Unable to create session "
1085 "work, command will be refused", 0);
1086 return -ENOMEM;
1087 }
1088
1089 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1090 "Scheduling work (type %d, prm %p)"
1091 " to find session for param %p (size %d, tgt %p)\n",
1092 type, prm, param, param_size, tgt);
1093
1094 prm->type = type;
1095 memcpy(&prm->tm_iocb, param, param_size);
1096
1097 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1098 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1099 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1100
1101 schedule_work(&tgt->sess_work);
1102
1103 return 0;
1104 }
1105
1106 /*
1107 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1108 */
1109 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1110 struct imm_ntfy_from_isp *ntfy,
1111 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1112 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1113 {
1114 struct qla_hw_data *ha = vha->hw;
1115 request_t *pkt;
1116 struct nack_to_isp *nack;
1117
1118 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1119
1120 /* Send marker if required */
1121 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1122 return;
1123
1124 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1125 if (!pkt) {
1126 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1127 "qla_target(%d): %s failed: unable to allocate "
1128 "request packet\n", vha->vp_idx, __func__);
1129 return;
1130 }
1131
1132 if (vha->vha_tgt.qla_tgt != NULL)
1133 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1134
1135 pkt->entry_type = NOTIFY_ACK_TYPE;
1136 pkt->entry_count = 1;
1137
1138 nack = (struct nack_to_isp *)pkt;
1139 nack->ox_id = ntfy->ox_id;
1140
1141 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1142 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1143 nack->u.isp24.flags = ntfy->u.isp24.flags &
1144 cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1145 }
1146 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1147 nack->u.isp24.status = ntfy->u.isp24.status;
1148 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1149 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1150 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1151 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1152 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1153 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1154 nack->u.isp24.srr_reject_code = srr_reject_code;
1155 nack->u.isp24.srr_reject_code_expl = srr_explan;
1156 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1157
1158 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1159 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1160 vha->vp_idx, nack->u.isp24.status);
1161
1162 /* Memory Barrier */
1163 wmb();
1164 qla2x00_start_iocbs(vha, vha->req);
1165 }
1166
1167 /*
1168 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1169 */
1170 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1171 struct abts_recv_from_24xx *abts, uint32_t status,
1172 bool ids_reversed)
1173 {
1174 struct qla_hw_data *ha = vha->hw;
1175 struct abts_resp_to_24xx *resp;
1176 uint32_t f_ctl;
1177 uint8_t *p;
1178
1179 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1180 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1181 ha, abts, status);
1182
1183 /* Send marker if required */
1184 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1185 return;
1186
1187 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1188 if (!resp) {
1189 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1190 "qla_target(%d): %s failed: unable to allocate "
1191 "request packet", vha->vp_idx, __func__);
1192 return;
1193 }
1194
1195 resp->entry_type = ABTS_RESP_24XX;
1196 resp->entry_count = 1;
1197 resp->nport_handle = abts->nport_handle;
1198 resp->vp_index = vha->vp_idx;
1199 resp->sof_type = abts->sof_type;
1200 resp->exchange_address = abts->exchange_address;
1201 resp->fcp_hdr_le = abts->fcp_hdr_le;
1202 f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1203 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1204 F_CTL_SEQ_INITIATIVE);
1205 p = (uint8_t *)&f_ctl;
1206 resp->fcp_hdr_le.f_ctl[0] = *p++;
1207 resp->fcp_hdr_le.f_ctl[1] = *p++;
1208 resp->fcp_hdr_le.f_ctl[2] = *p;
1209 if (ids_reversed) {
1210 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1211 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1212 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1213 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1214 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1215 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1216 } else {
1217 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1218 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1219 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1220 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1221 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1222 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1223 }
1224 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1225 if (status == FCP_TMF_CMPL) {
1226 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1227 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1228 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1229 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1230 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1231 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1232 } else {
1233 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1234 resp->payload.ba_rjt.reason_code =
1235 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1236 /* Other bytes are zero */
1237 }
1238
1239 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1240
1241 /* Memory Barrier */
1242 wmb();
1243 qla2x00_start_iocbs(vha, vha->req);
1244 }
1245
1246 /*
1247 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1248 */
1249 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1250 struct abts_resp_from_24xx_fw *entry)
1251 {
1252 struct ctio7_to_24xx *ctio;
1253
1254 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1255 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1256 /* Send marker if required */
1257 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1258 return;
1259
1260 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1261 if (ctio == NULL) {
1262 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1263 "qla_target(%d): %s failed: unable to allocate "
1264 "request packet\n", vha->vp_idx, __func__);
1265 return;
1266 }
1267
1268 /*
1269 * We've got on entrance firmware's response on by us generated
1270 * ABTS response. So, in it ID fields are reversed.
1271 */
1272
1273 ctio->entry_type = CTIO_TYPE7;
1274 ctio->entry_count = 1;
1275 ctio->nport_handle = entry->nport_handle;
1276 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1277 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1278 ctio->vp_index = vha->vp_idx;
1279 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1280 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1281 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1282 ctio->exchange_addr = entry->exchange_addr_to_abort;
1283 ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1284 CTIO7_FLAGS_TERMINATE);
1285 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1286
1287 /* Memory Barrier */
1288 wmb();
1289 qla2x00_start_iocbs(vha, vha->req);
1290
1291 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1292 FCP_TMF_CMPL, true);
1293 }
1294
1295 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1296 {
1297 struct qla_tgt_sess_op *op;
1298 struct qla_tgt_cmd *cmd;
1299
1300 spin_lock(&vha->cmd_list_lock);
1301
1302 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1303 if (tag == op->atio.u.isp24.exchange_addr) {
1304 op->aborted = true;
1305 spin_unlock(&vha->cmd_list_lock);
1306 return 1;
1307 }
1308 }
1309
1310 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1311 if (tag == cmd->atio.u.isp24.exchange_addr) {
1312 cmd->state = QLA_TGT_STATE_ABORTED;
1313 spin_unlock(&vha->cmd_list_lock);
1314 return 1;
1315 }
1316 }
1317
1318 spin_unlock(&vha->cmd_list_lock);
1319 return 0;
1320 }
1321
1322 /* drop cmds for the given lun
1323 * XXX only looks for cmds on the port through which lun reset was recieved
1324 * XXX does not go through the list of other port (which may have cmds
1325 * for the same lun)
1326 */
1327 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1328 uint32_t lun, uint8_t *s_id)
1329 {
1330 struct qla_tgt_sess_op *op;
1331 struct qla_tgt_cmd *cmd;
1332 uint32_t key;
1333
1334 key = sid_to_key(s_id);
1335 spin_lock(&vha->cmd_list_lock);
1336 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1337 uint32_t op_key;
1338 uint32_t op_lun;
1339
1340 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1341 op_lun = scsilun_to_int(
1342 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1343 if (op_key == key && op_lun == lun)
1344 op->aborted = true;
1345 }
1346 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1347 uint32_t cmd_key;
1348 uint32_t cmd_lun;
1349
1350 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1351 cmd_lun = scsilun_to_int(
1352 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1353 if (cmd_key == key && cmd_lun == lun)
1354 cmd->state = QLA_TGT_STATE_ABORTED;
1355 }
1356 spin_unlock(&vha->cmd_list_lock);
1357 }
1358
1359 /* ha->hardware_lock supposed to be held on entry */
1360 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1361 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1362 {
1363 struct qla_hw_data *ha = vha->hw;
1364 struct se_session *se_sess = sess->se_sess;
1365 struct qla_tgt_mgmt_cmd *mcmd;
1366 struct se_cmd *se_cmd;
1367 u32 lun = 0;
1368 int rc;
1369 bool found_lun = false;
1370
1371 spin_lock(&se_sess->sess_cmd_lock);
1372 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1373 struct qla_tgt_cmd *cmd =
1374 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1375 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1376 lun = cmd->unpacked_lun;
1377 found_lun = true;
1378 break;
1379 }
1380 }
1381 spin_unlock(&se_sess->sess_cmd_lock);
1382
1383 /* cmd not in LIO lists, look in qla list */
1384 if (!found_lun) {
1385 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1386 /* send TASK_ABORT response immediately */
1387 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1388 return 0;
1389 } else {
1390 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1391 "unable to find cmd in driver or LIO for tag 0x%x\n",
1392 abts->exchange_addr_to_abort);
1393 return -ENOENT;
1394 }
1395 }
1396
1397 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1398 "qla_target(%d): task abort (tag=%d)\n",
1399 vha->vp_idx, abts->exchange_addr_to_abort);
1400
1401 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1402 if (mcmd == NULL) {
1403 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1404 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1405 vha->vp_idx, __func__);
1406 return -ENOMEM;
1407 }
1408 memset(mcmd, 0, sizeof(*mcmd));
1409
1410 mcmd->sess = sess;
1411 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1412 mcmd->reset_count = vha->hw->chip_reset;
1413
1414 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1415 abts->exchange_addr_to_abort);
1416 if (rc != 0) {
1417 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1418 "qla_target(%d): tgt_ops->handle_tmr()"
1419 " failed: %d", vha->vp_idx, rc);
1420 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1421 return -EFAULT;
1422 }
1423
1424 return 0;
1425 }
1426
1427 /*
1428 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1429 */
1430 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1431 struct abts_recv_from_24xx *abts)
1432 {
1433 struct qla_hw_data *ha = vha->hw;
1434 struct qla_tgt_sess *sess;
1435 uint32_t tag = abts->exchange_addr_to_abort;
1436 uint8_t s_id[3];
1437 int rc;
1438
1439 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1440 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1441 "qla_target(%d): ABTS: Abort Sequence not "
1442 "supported\n", vha->vp_idx);
1443 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1444 return;
1445 }
1446
1447 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1448 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1449 "qla_target(%d): ABTS: Unknown Exchange "
1450 "Address received\n", vha->vp_idx);
1451 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1452 return;
1453 }
1454
1455 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1456 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1457 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1458 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1459 le32_to_cpu(abts->fcp_hdr_le.parameter));
1460
1461 s_id[0] = abts->fcp_hdr_le.s_id[2];
1462 s_id[1] = abts->fcp_hdr_le.s_id[1];
1463 s_id[2] = abts->fcp_hdr_le.s_id[0];
1464
1465 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1466 if (!sess) {
1467 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1468 "qla_target(%d): task abort for non-existant session\n",
1469 vha->vp_idx);
1470 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1471 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1472 if (rc != 0) {
1473 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1474 false);
1475 }
1476 return;
1477 }
1478
1479 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1480 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1481 return;
1482 }
1483
1484 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1485 if (rc != 0) {
1486 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1487 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1488 vha->vp_idx, rc);
1489 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1490 return;
1491 }
1492 }
1493
1494 /*
1495 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1496 */
1497 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1498 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1499 {
1500 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1501 struct ctio7_to_24xx *ctio;
1502 uint16_t temp;
1503
1504 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1505 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1506 ha, atio, resp_code);
1507
1508 /* Send marker if required */
1509 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1510 return;
1511
1512 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1513 if (ctio == NULL) {
1514 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1515 "qla_target(%d): %s failed: unable to allocate "
1516 "request packet\n", ha->vp_idx, __func__);
1517 return;
1518 }
1519
1520 ctio->entry_type = CTIO_TYPE7;
1521 ctio->entry_count = 1;
1522 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1523 ctio->nport_handle = mcmd->sess->loop_id;
1524 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1525 ctio->vp_index = ha->vp_idx;
1526 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1527 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1528 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1529 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1530 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1531 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1532 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1533 ctio->u.status1.ox_id = cpu_to_le16(temp);
1534 ctio->u.status1.scsi_status =
1535 cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1536 ctio->u.status1.response_len = cpu_to_le16(8);
1537 ctio->u.status1.sense_data[0] = resp_code;
1538
1539 /* Memory Barrier */
1540 wmb();
1541 qla2x00_start_iocbs(ha, ha->req);
1542 }
1543
1544 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1545 {
1546 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1547 }
1548 EXPORT_SYMBOL(qlt_free_mcmd);
1549
1550 /* callback from target fabric module code */
1551 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1552 {
1553 struct scsi_qla_host *vha = mcmd->sess->vha;
1554 struct qla_hw_data *ha = vha->hw;
1555 unsigned long flags;
1556
1557 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1558 "TM response mcmd (%p) status %#x state %#x",
1559 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1560
1561 spin_lock_irqsave(&ha->hardware_lock, flags);
1562
1563 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1564 /*
1565 * Either a chip reset is active or this request was from
1566 * previous life, just abort the processing.
1567 */
1568 ql_dbg(ql_dbg_async, vha, 0xe100,
1569 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1570 qla2x00_reset_active(vha), mcmd->reset_count,
1571 ha->chip_reset);
1572 ha->tgt.tgt_ops->free_mcmd(mcmd);
1573 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1574 return;
1575 }
1576
1577 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1578 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1579 0, 0, 0, 0, 0, 0);
1580 else {
1581 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1582 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1583 mcmd->fc_tm_rsp, false);
1584 else
1585 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1586 mcmd->fc_tm_rsp);
1587 }
1588 /*
1589 * Make the callback for ->free_mcmd() to queue_work() and invoke
1590 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1591 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1592 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1593 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1594 * qlt_xmit_tm_rsp() returns here..
1595 */
1596 ha->tgt.tgt_ops->free_mcmd(mcmd);
1597 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1598 }
1599 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1600
1601 /* No locks */
1602 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1603 {
1604 struct qla_tgt_cmd *cmd = prm->cmd;
1605
1606 BUG_ON(cmd->sg_cnt == 0);
1607
1608 prm->sg = (struct scatterlist *)cmd->sg;
1609 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1610 cmd->sg_cnt, cmd->dma_data_direction);
1611 if (unlikely(prm->seg_cnt == 0))
1612 goto out_err;
1613
1614 prm->cmd->sg_mapped = 1;
1615
1616 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1617 /*
1618 * If greater than four sg entries then we need to allocate
1619 * the continuation entries
1620 */
1621 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1622 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1623 prm->tgt->datasegs_per_cmd,
1624 prm->tgt->datasegs_per_cont);
1625 } else {
1626 /* DIF */
1627 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1628 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1629 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1630 prm->tot_dsds = prm->seg_cnt;
1631 } else
1632 prm->tot_dsds = prm->seg_cnt;
1633
1634 if (cmd->prot_sg_cnt) {
1635 prm->prot_sg = cmd->prot_sg;
1636 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1637 cmd->prot_sg, cmd->prot_sg_cnt,
1638 cmd->dma_data_direction);
1639 if (unlikely(prm->prot_seg_cnt == 0))
1640 goto out_err;
1641
1642 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1643 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1644 /* Dif Bundling not support here */
1645 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1646 cmd->blk_sz);
1647 prm->tot_dsds += prm->prot_seg_cnt;
1648 } else
1649 prm->tot_dsds += prm->prot_seg_cnt;
1650 }
1651 }
1652
1653 return 0;
1654
1655 out_err:
1656 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1657 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1658 0, prm->cmd->sg_cnt);
1659 return -1;
1660 }
1661
1662 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1663 {
1664 struct qla_hw_data *ha = vha->hw;
1665
1666 if (!cmd->sg_mapped)
1667 return;
1668
1669 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1670 cmd->sg_mapped = 0;
1671
1672 if (cmd->prot_sg_cnt)
1673 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1674 cmd->dma_data_direction);
1675
1676 if (cmd->ctx_dsd_alloced)
1677 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1678
1679 if (cmd->ctx)
1680 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1681 }
1682
1683 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1684 uint32_t req_cnt)
1685 {
1686 uint32_t cnt, cnt_in;
1687
1688 if (vha->req->cnt < (req_cnt + 2)) {
1689 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1690 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1691
1692 if (vha->req->ring_index < cnt)
1693 vha->req->cnt = cnt - vha->req->ring_index;
1694 else
1695 vha->req->cnt = vha->req->length -
1696 (vha->req->ring_index - cnt);
1697 }
1698
1699 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1700 ql_dbg(ql_dbg_io, vha, 0x305a,
1701 "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1702 vha->vp_idx, vha->req->ring_index,
1703 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1704 return -EAGAIN;
1705 }
1706 vha->req->cnt -= req_cnt;
1707
1708 return 0;
1709 }
1710
1711 /*
1712 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1713 */
1714 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1715 {
1716 /* Adjust ring index. */
1717 vha->req->ring_index++;
1718 if (vha->req->ring_index == vha->req->length) {
1719 vha->req->ring_index = 0;
1720 vha->req->ring_ptr = vha->req->ring;
1721 } else {
1722 vha->req->ring_ptr++;
1723 }
1724 return (cont_entry_t *)vha->req->ring_ptr;
1725 }
1726
1727 /* ha->hardware_lock supposed to be held on entry */
1728 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1729 {
1730 struct qla_hw_data *ha = vha->hw;
1731 uint32_t h;
1732
1733 h = ha->tgt.current_handle;
1734 /* always increment cmd handle */
1735 do {
1736 ++h;
1737 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1738 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1739 if (h == ha->tgt.current_handle) {
1740 ql_dbg(ql_dbg_io, vha, 0x305b,
1741 "qla_target(%d): Ran out of "
1742 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1743 h = QLA_TGT_NULL_HANDLE;
1744 break;
1745 }
1746 } while ((h == QLA_TGT_NULL_HANDLE) ||
1747 (h == QLA_TGT_SKIP_HANDLE) ||
1748 (ha->tgt.cmds[h-1] != NULL));
1749
1750 if (h != QLA_TGT_NULL_HANDLE)
1751 ha->tgt.current_handle = h;
1752
1753 return h;
1754 }
1755
1756 /* ha->hardware_lock supposed to be held on entry */
1757 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1758 struct scsi_qla_host *vha)
1759 {
1760 uint32_t h;
1761 struct ctio7_to_24xx *pkt;
1762 struct qla_hw_data *ha = vha->hw;
1763 struct atio_from_isp *atio = &prm->cmd->atio;
1764 uint16_t temp;
1765
1766 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1767 prm->pkt = pkt;
1768 memset(pkt, 0, sizeof(*pkt));
1769
1770 pkt->entry_type = CTIO_TYPE7;
1771 pkt->entry_count = (uint8_t)prm->req_cnt;
1772 pkt->vp_index = vha->vp_idx;
1773
1774 h = qlt_make_handle(vha);
1775 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1776 /*
1777 * CTIO type 7 from the firmware doesn't provide a way to
1778 * know the initiator's LOOP ID, hence we can't find
1779 * the session and, so, the command.
1780 */
1781 return -EAGAIN;
1782 } else
1783 ha->tgt.cmds[h-1] = prm->cmd;
1784
1785 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1786 pkt->nport_handle = prm->cmd->loop_id;
1787 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1788 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1789 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1790 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1791 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1792 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1793 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1794 pkt->u.status0.ox_id = cpu_to_le16(temp);
1795 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1796
1797 return 0;
1798 }
1799
1800 /*
1801 * ha->hardware_lock supposed to be held on entry. We have already made sure
1802 * that there is sufficient amount of request entries to not drop it.
1803 */
1804 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1805 struct scsi_qla_host *vha)
1806 {
1807 int cnt;
1808 uint32_t *dword_ptr;
1809 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1810
1811 /* Build continuation packets */
1812 while (prm->seg_cnt > 0) {
1813 cont_a64_entry_t *cont_pkt64 =
1814 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1815
1816 /*
1817 * Make sure that from cont_pkt64 none of
1818 * 64-bit specific fields used for 32-bit
1819 * addressing. Cast to (cont_entry_t *) for
1820 * that.
1821 */
1822
1823 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1824
1825 cont_pkt64->entry_count = 1;
1826 cont_pkt64->sys_define = 0;
1827
1828 if (enable_64bit_addressing) {
1829 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1830 dword_ptr =
1831 (uint32_t *)&cont_pkt64->dseg_0_address;
1832 } else {
1833 cont_pkt64->entry_type = CONTINUE_TYPE;
1834 dword_ptr =
1835 (uint32_t *)&((cont_entry_t *)
1836 cont_pkt64)->dseg_0_address;
1837 }
1838
1839 /* Load continuation entry data segments */
1840 for (cnt = 0;
1841 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1842 cnt++, prm->seg_cnt--) {
1843 *dword_ptr++ =
1844 cpu_to_le32(pci_dma_lo32
1845 (sg_dma_address(prm->sg)));
1846 if (enable_64bit_addressing) {
1847 *dword_ptr++ =
1848 cpu_to_le32(pci_dma_hi32
1849 (sg_dma_address
1850 (prm->sg)));
1851 }
1852 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1853
1854 prm->sg = sg_next(prm->sg);
1855 }
1856 }
1857 }
1858
1859 /*
1860 * ha->hardware_lock supposed to be held on entry. We have already made sure
1861 * that there is sufficient amount of request entries to not drop it.
1862 */
1863 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1864 struct scsi_qla_host *vha)
1865 {
1866 int cnt;
1867 uint32_t *dword_ptr;
1868 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1869 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1870
1871 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1872
1873 /* Setup packet address segment pointer */
1874 dword_ptr = pkt24->u.status0.dseg_0_address;
1875
1876 /* Set total data segment count */
1877 if (prm->seg_cnt)
1878 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1879
1880 if (prm->seg_cnt == 0) {
1881 /* No data transfer */
1882 *dword_ptr++ = 0;
1883 *dword_ptr = 0;
1884 return;
1885 }
1886
1887 /* If scatter gather */
1888
1889 /* Load command entry data segments */
1890 for (cnt = 0;
1891 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1892 cnt++, prm->seg_cnt--) {
1893 *dword_ptr++ =
1894 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1895 if (enable_64bit_addressing) {
1896 *dword_ptr++ =
1897 cpu_to_le32(pci_dma_hi32(
1898 sg_dma_address(prm->sg)));
1899 }
1900 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1901
1902 prm->sg = sg_next(prm->sg);
1903 }
1904
1905 qlt_load_cont_data_segments(prm, vha);
1906 }
1907
1908 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1909 {
1910 return cmd->bufflen > 0;
1911 }
1912
1913 /*
1914 * Called without ha->hardware_lock held
1915 */
1916 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1917 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1918 uint32_t *full_req_cnt)
1919 {
1920 struct qla_tgt *tgt = cmd->tgt;
1921 struct scsi_qla_host *vha = tgt->vha;
1922 struct qla_hw_data *ha = vha->hw;
1923 struct se_cmd *se_cmd = &cmd->se_cmd;
1924
1925 prm->cmd = cmd;
1926 prm->tgt = tgt;
1927 prm->rq_result = scsi_status;
1928 prm->sense_buffer = &cmd->sense_buffer[0];
1929 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1930 prm->sg = NULL;
1931 prm->seg_cnt = -1;
1932 prm->req_cnt = 1;
1933 prm->add_status_pkt = 0;
1934
1935 /* Send marker if required */
1936 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1937 return -EFAULT;
1938
1939 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1940 if (qlt_pci_map_calc_cnt(prm) != 0)
1941 return -EAGAIN;
1942 }
1943
1944 *full_req_cnt = prm->req_cnt;
1945
1946 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1947 prm->residual = se_cmd->residual_count;
1948 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1949 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1950 prm->residual, se_cmd->tag,
1951 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1952 cmd->bufflen, prm->rq_result);
1953 prm->rq_result |= SS_RESIDUAL_UNDER;
1954 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1955 prm->residual = se_cmd->residual_count;
1956 ql_dbg(ql_dbg_io, vha, 0x305d,
1957 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1958 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1959 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1960 prm->rq_result |= SS_RESIDUAL_OVER;
1961 }
1962
1963 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1964 /*
1965 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1966 * ignored in *xmit_response() below
1967 */
1968 if (qlt_has_data(cmd)) {
1969 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1970 (IS_FWI2_CAPABLE(ha) &&
1971 (prm->rq_result != 0))) {
1972 prm->add_status_pkt = 1;
1973 (*full_req_cnt)++;
1974 }
1975 }
1976 }
1977
1978 return 0;
1979 }
1980
1981 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1982 struct qla_tgt_cmd *cmd, int sending_sense)
1983 {
1984 if (ha->tgt.enable_class_2)
1985 return 0;
1986
1987 if (sending_sense)
1988 return cmd->conf_compl_supported;
1989 else
1990 return ha->tgt.enable_explicit_conf &&
1991 cmd->conf_compl_supported;
1992 }
1993
1994 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1995 /*
1996 * Original taken from the XFS code
1997 */
1998 static unsigned long qlt_srr_random(void)
1999 {
2000 static int Inited;
2001 static unsigned long RandomValue;
2002 static DEFINE_SPINLOCK(lock);
2003 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2004 register long rv;
2005 register long lo;
2006 register long hi;
2007 unsigned long flags;
2008
2009 spin_lock_irqsave(&lock, flags);
2010 if (!Inited) {
2011 RandomValue = jiffies;
2012 Inited = 1;
2013 }
2014 rv = RandomValue;
2015 hi = rv / 127773;
2016 lo = rv % 127773;
2017 rv = 16807 * lo - 2836 * hi;
2018 if (rv <= 0)
2019 rv += 2147483647;
2020 RandomValue = rv;
2021 spin_unlock_irqrestore(&lock, flags);
2022 return rv;
2023 }
2024
2025 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2026 {
2027 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2028 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2029 == 50) {
2030 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2031 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2032 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2033 }
2034 #endif
2035 /*
2036 * It's currently not possible to simulate SRRs for FCP_WRITE without
2037 * a physical link layer failure, so don't even try here..
2038 */
2039 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2040 return;
2041
2042 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2043 ((qlt_srr_random() % 100) == 20)) {
2044 int i, leave = 0;
2045 unsigned int tot_len = 0;
2046
2047 while (leave == 0)
2048 leave = qlt_srr_random() % cmd->sg_cnt;
2049
2050 for (i = 0; i < leave; i++)
2051 tot_len += cmd->sg[i].length;
2052
2053 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2054 "Cutting cmd %p (tag %d) buffer"
2055 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2056 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2057 cmd->bufflen, cmd->sg_cnt);
2058
2059 cmd->bufflen = tot_len;
2060 cmd->sg_cnt = leave;
2061 }
2062
2063 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2064 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2065
2066 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2067 "Cutting cmd %p (tag %d) buffer head "
2068 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2069 cmd->bufflen);
2070 if (offset == 0)
2071 *xmit_type &= ~QLA_TGT_XMIT_DATA;
2072 else if (qlt_set_data_offset(cmd, offset)) {
2073 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2074 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2075 }
2076 }
2077 }
2078 #else
2079 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2080 {}
2081 #endif
2082
2083 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2084 struct qla_tgt_prm *prm)
2085 {
2086 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2087 (uint32_t)sizeof(ctio->u.status1.sense_data));
2088 ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2089 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2090 ctio->u.status0.flags |= cpu_to_le16(
2091 CTIO7_FLAGS_EXPLICIT_CONFORM |
2092 CTIO7_FLAGS_CONFORM_REQ);
2093 }
2094 ctio->u.status0.residual = cpu_to_le32(prm->residual);
2095 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2096 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2097 int i;
2098
2099 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2100 if (prm->cmd->se_cmd.scsi_status != 0) {
2101 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2102 "Skipping EXPLICIT_CONFORM and "
2103 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2104 "non GOOD status\n");
2105 goto skip_explict_conf;
2106 }
2107 ctio->u.status1.flags |= cpu_to_le16(
2108 CTIO7_FLAGS_EXPLICIT_CONFORM |
2109 CTIO7_FLAGS_CONFORM_REQ);
2110 }
2111 skip_explict_conf:
2112 ctio->u.status1.flags &=
2113 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2114 ctio->u.status1.flags |=
2115 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2116 ctio->u.status1.scsi_status |=
2117 cpu_to_le16(SS_SENSE_LEN_VALID);
2118 ctio->u.status1.sense_length =
2119 cpu_to_le16(prm->sense_buffer_len);
2120 for (i = 0; i < prm->sense_buffer_len/4; i++)
2121 ((uint32_t *)ctio->u.status1.sense_data)[i] =
2122 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2123 #if 0
2124 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2125 static int q;
2126 if (q < 10) {
2127 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2128 "qla_target(%d): %d bytes of sense "
2129 "lost", prm->tgt->ha->vp_idx,
2130 prm->sense_buffer_len % 4);
2131 q++;
2132 }
2133 }
2134 #endif
2135 } else {
2136 ctio->u.status1.flags &=
2137 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2138 ctio->u.status1.flags |=
2139 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2140 ctio->u.status1.sense_length = 0;
2141 memset(ctio->u.status1.sense_data, 0,
2142 sizeof(ctio->u.status1.sense_data));
2143 }
2144
2145 /* Sense with len > 24, is it possible ??? */
2146 }
2147
2148
2149
2150 /* diff */
2151 static inline int
2152 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2153 {
2154 /*
2155 * Uncomment when corresponding SCSI changes are done.
2156 *
2157 if (!sp->cmd->prot_chk)
2158 return 0;
2159 *
2160 */
2161 switch (se_cmd->prot_op) {
2162 case TARGET_PROT_DOUT_INSERT:
2163 case TARGET_PROT_DIN_STRIP:
2164 if (ql2xenablehba_err_chk >= 1)
2165 return 1;
2166 break;
2167 case TARGET_PROT_DOUT_PASS:
2168 case TARGET_PROT_DIN_PASS:
2169 if (ql2xenablehba_err_chk >= 2)
2170 return 1;
2171 break;
2172 case TARGET_PROT_DIN_INSERT:
2173 case TARGET_PROT_DOUT_STRIP:
2174 return 1;
2175 default:
2176 break;
2177 }
2178 return 0;
2179 }
2180
2181 /*
2182 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2183 *
2184 */
2185 static inline void
2186 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2187 {
2188 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2189
2190 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2191 * have been immplemented by TCM, before AppTag is avail.
2192 * Look for modesense_handlers[]
2193 */
2194 ctx->app_tag = 0;
2195 ctx->app_tag_mask[0] = 0x0;
2196 ctx->app_tag_mask[1] = 0x0;
2197
2198 switch (se_cmd->prot_type) {
2199 case TARGET_DIF_TYPE0_PROT:
2200 /*
2201 * No check for ql2xenablehba_err_chk, as it would be an
2202 * I/O error if hba tag generation is not done.
2203 */
2204 ctx->ref_tag = cpu_to_le32(lba);
2205
2206 if (!qlt_hba_err_chk_enabled(se_cmd))
2207 break;
2208
2209 /* enable ALL bytes of the ref tag */
2210 ctx->ref_tag_mask[0] = 0xff;
2211 ctx->ref_tag_mask[1] = 0xff;
2212 ctx->ref_tag_mask[2] = 0xff;
2213 ctx->ref_tag_mask[3] = 0xff;
2214 break;
2215 /*
2216 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2217 * 16 bit app tag.
2218 */
2219 case TARGET_DIF_TYPE1_PROT:
2220 ctx->ref_tag = cpu_to_le32(lba);
2221
2222 if (!qlt_hba_err_chk_enabled(se_cmd))
2223 break;
2224
2225 /* enable ALL bytes of the ref tag */
2226 ctx->ref_tag_mask[0] = 0xff;
2227 ctx->ref_tag_mask[1] = 0xff;
2228 ctx->ref_tag_mask[2] = 0xff;
2229 ctx->ref_tag_mask[3] = 0xff;
2230 break;
2231 /*
2232 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2233 * match LBA in CDB + N
2234 */
2235 case TARGET_DIF_TYPE2_PROT:
2236 ctx->ref_tag = cpu_to_le32(lba);
2237
2238 if (!qlt_hba_err_chk_enabled(se_cmd))
2239 break;
2240
2241 /* enable ALL bytes of the ref tag */
2242 ctx->ref_tag_mask[0] = 0xff;
2243 ctx->ref_tag_mask[1] = 0xff;
2244 ctx->ref_tag_mask[2] = 0xff;
2245 ctx->ref_tag_mask[3] = 0xff;
2246 break;
2247
2248 /* For Type 3 protection: 16 bit GUARD only */
2249 case TARGET_DIF_TYPE3_PROT:
2250 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2251 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2252 break;
2253 }
2254 }
2255
2256
2257 static inline int
2258 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2259 {
2260 uint32_t *cur_dsd;
2261 uint32_t transfer_length = 0;
2262 uint32_t data_bytes;
2263 uint32_t dif_bytes;
2264 uint8_t bundling = 1;
2265 uint8_t *clr_ptr;
2266 struct crc_context *crc_ctx_pkt = NULL;
2267 struct qla_hw_data *ha;
2268 struct ctio_crc2_to_fw *pkt;
2269 dma_addr_t crc_ctx_dma;
2270 uint16_t fw_prot_opts = 0;
2271 struct qla_tgt_cmd *cmd = prm->cmd;
2272 struct se_cmd *se_cmd = &cmd->se_cmd;
2273 uint32_t h;
2274 struct atio_from_isp *atio = &prm->cmd->atio;
2275 uint16_t t16;
2276
2277 ha = vha->hw;
2278
2279 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2280 prm->pkt = pkt;
2281 memset(pkt, 0, sizeof(*pkt));
2282
2283 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2284 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2285 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2286 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2287
2288 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2289 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2290 bundling = 0;
2291
2292 /* Compute dif len and adjust data len to incude protection */
2293 data_bytes = cmd->bufflen;
2294 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2295
2296 switch (se_cmd->prot_op) {
2297 case TARGET_PROT_DIN_INSERT:
2298 case TARGET_PROT_DOUT_STRIP:
2299 transfer_length = data_bytes;
2300 data_bytes += dif_bytes;
2301 break;
2302
2303 case TARGET_PROT_DIN_STRIP:
2304 case TARGET_PROT_DOUT_INSERT:
2305 case TARGET_PROT_DIN_PASS:
2306 case TARGET_PROT_DOUT_PASS:
2307 transfer_length = data_bytes + dif_bytes;
2308 break;
2309
2310 default:
2311 BUG();
2312 break;
2313 }
2314
2315 if (!qlt_hba_err_chk_enabled(se_cmd))
2316 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2317 /* HBA error checking enabled */
2318 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2319 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2320 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2321 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2322 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2323 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2324 }
2325
2326 switch (se_cmd->prot_op) {
2327 case TARGET_PROT_DIN_INSERT:
2328 case TARGET_PROT_DOUT_INSERT:
2329 fw_prot_opts |= PO_MODE_DIF_INSERT;
2330 break;
2331 case TARGET_PROT_DIN_STRIP:
2332 case TARGET_PROT_DOUT_STRIP:
2333 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2334 break;
2335 case TARGET_PROT_DIN_PASS:
2336 case TARGET_PROT_DOUT_PASS:
2337 fw_prot_opts |= PO_MODE_DIF_PASS;
2338 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2339 break;
2340 default:/* Normal Request */
2341 fw_prot_opts |= PO_MODE_DIF_PASS;
2342 break;
2343 }
2344
2345
2346 /* ---- PKT ---- */
2347 /* Update entry type to indicate Command Type CRC_2 IOCB */
2348 pkt->entry_type = CTIO_CRC2;
2349 pkt->entry_count = 1;
2350 pkt->vp_index = vha->vp_idx;
2351
2352 h = qlt_make_handle(vha);
2353 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2354 /*
2355 * CTIO type 7 from the firmware doesn't provide a way to
2356 * know the initiator's LOOP ID, hence we can't find
2357 * the session and, so, the command.
2358 */
2359 return -EAGAIN;
2360 } else
2361 ha->tgt.cmds[h-1] = prm->cmd;
2362
2363
2364 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2365 pkt->nport_handle = prm->cmd->loop_id;
2366 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2367 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2368 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2369 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2370 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2371
2372 /* silence compile warning */
2373 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2374 pkt->ox_id = cpu_to_le16(t16);
2375
2376 t16 = (atio->u.isp24.attr << 9);
2377 pkt->flags |= cpu_to_le16(t16);
2378 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2379
2380 /* Set transfer direction */
2381 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2382 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2383 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2384 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2385
2386
2387 pkt->dseg_count = prm->tot_dsds;
2388 /* Fibre channel byte count */
2389 pkt->transfer_length = cpu_to_le32(transfer_length);
2390
2391
2392 /* ----- CRC context -------- */
2393
2394 /* Allocate CRC context from global pool */
2395 crc_ctx_pkt = cmd->ctx =
2396 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2397
2398 if (!crc_ctx_pkt)
2399 goto crc_queuing_error;
2400
2401 /* Zero out CTX area. */
2402 clr_ptr = (uint8_t *)crc_ctx_pkt;
2403 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2404
2405 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2406 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2407
2408 /* Set handle */
2409 crc_ctx_pkt->handle = pkt->handle;
2410
2411 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2412
2413 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2414 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2415 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2416
2417
2418 if (!bundling) {
2419 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2420 } else {
2421 /*
2422 * Configure Bundling if we need to fetch interlaving
2423 * protection PCI accesses
2424 */
2425 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2426 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2427 crc_ctx_pkt->u.bundling.dseg_count =
2428 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2429 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2430 }
2431
2432 /* Finish the common fields of CRC pkt */
2433 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2434 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2435 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2436 crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2437
2438
2439 /* Walks data segments */
2440 pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2441
2442 if (!bundling && prm->prot_seg_cnt) {
2443 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2444 prm->tot_dsds, cmd))
2445 goto crc_queuing_error;
2446 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2447 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2448 goto crc_queuing_error;
2449
2450 if (bundling && prm->prot_seg_cnt) {
2451 /* Walks dif segments */
2452 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2453
2454 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2455 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2456 prm->prot_seg_cnt, cmd))
2457 goto crc_queuing_error;
2458 }
2459 return QLA_SUCCESS;
2460
2461 crc_queuing_error:
2462 /* Cleanup will be performed by the caller */
2463
2464 return QLA_FUNCTION_FAILED;
2465 }
2466
2467
2468 /*
2469 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2470 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2471 */
2472 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2473 uint8_t scsi_status)
2474 {
2475 struct scsi_qla_host *vha = cmd->vha;
2476 struct qla_hw_data *ha = vha->hw;
2477 struct ctio7_to_24xx *pkt;
2478 struct qla_tgt_prm prm;
2479 uint32_t full_req_cnt = 0;
2480 unsigned long flags = 0;
2481 int res;
2482
2483 spin_lock_irqsave(&ha->hardware_lock, flags);
2484 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2485 cmd->state = QLA_TGT_STATE_PROCESSED;
2486 if (cmd->sess->logout_completed)
2487 /* no need to terminate. FW already freed exchange. */
2488 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2489 else
2490 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2491 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2492 return 0;
2493 }
2494 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2495
2496 memset(&prm, 0, sizeof(prm));
2497 qlt_check_srr_debug(cmd, &xmit_type);
2498
2499 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2500 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2501 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2502 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2503 &cmd->se_cmd);
2504
2505 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2506 &full_req_cnt);
2507 if (unlikely(res != 0)) {
2508 return res;
2509 }
2510
2511 spin_lock_irqsave(&ha->hardware_lock, flags);
2512
2513 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2514 /*
2515 * Either a chip reset is active or this request was from
2516 * previous life, just abort the processing.
2517 */
2518 cmd->state = QLA_TGT_STATE_PROCESSED;
2519 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2520 ql_dbg(ql_dbg_async, vha, 0xe101,
2521 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2522 qla2x00_reset_active(vha), cmd->reset_count,
2523 ha->chip_reset);
2524 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2525 return 0;
2526 }
2527
2528 /* Does F/W have an IOCBs for this request */
2529 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2530 if (unlikely(res))
2531 goto out_unmap_unlock;
2532
2533 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2534 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2535 else
2536 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2537 if (unlikely(res != 0)) {
2538 vha->req->cnt += full_req_cnt;
2539 goto out_unmap_unlock;
2540 }
2541
2542 pkt = (struct ctio7_to_24xx *)prm.pkt;
2543
2544 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2545 pkt->u.status0.flags |=
2546 cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2547 CTIO7_FLAGS_STATUS_MODE_0);
2548
2549 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2550 qlt_load_data_segments(&prm, vha);
2551
2552 if (prm.add_status_pkt == 0) {
2553 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2554 pkt->u.status0.scsi_status =
2555 cpu_to_le16(prm.rq_result);
2556 pkt->u.status0.residual =
2557 cpu_to_le32(prm.residual);
2558 pkt->u.status0.flags |= cpu_to_le16(
2559 CTIO7_FLAGS_SEND_STATUS);
2560 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2561 pkt->u.status0.flags |=
2562 cpu_to_le16(
2563 CTIO7_FLAGS_EXPLICIT_CONFORM |
2564 CTIO7_FLAGS_CONFORM_REQ);
2565 }
2566 }
2567
2568 } else {
2569 /*
2570 * We have already made sure that there is sufficient
2571 * amount of request entries to not drop HW lock in
2572 * req_pkt().
2573 */
2574 struct ctio7_to_24xx *ctio =
2575 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2576
2577 ql_dbg(ql_dbg_io, vha, 0x305e,
2578 "Building additional status packet 0x%p.\n",
2579 ctio);
2580
2581 /*
2582 * T10Dif: ctio_crc2_to_fw overlay ontop of
2583 * ctio7_to_24xx
2584 */
2585 memcpy(ctio, pkt, sizeof(*ctio));
2586 /* reset back to CTIO7 */
2587 ctio->entry_count = 1;
2588 ctio->entry_type = CTIO_TYPE7;
2589 ctio->dseg_count = 0;
2590 ctio->u.status1.flags &= ~cpu_to_le16(
2591 CTIO7_FLAGS_DATA_IN);
2592
2593 /* Real finish is ctio_m1's finish */
2594 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2595 pkt->u.status0.flags |= cpu_to_le16(
2596 CTIO7_FLAGS_DONT_RET_CTIO);
2597
2598 /* qlt_24xx_init_ctio_to_isp will correct
2599 * all neccessary fields that's part of CTIO7.
2600 * There should be no residual of CTIO-CRC2 data.
2601 */
2602 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2603 &prm);
2604 pr_debug("Status CTIO7: %p\n", ctio);
2605 }
2606 } else
2607 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2608
2609
2610 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2611 cmd->cmd_sent_to_fw = 1;
2612
2613 /* Memory Barrier */
2614 wmb();
2615 qla2x00_start_iocbs(vha, vha->req);
2616 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2617
2618 return 0;
2619
2620 out_unmap_unlock:
2621 qlt_unmap_sg(vha, cmd);
2622 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2623
2624 return res;
2625 }
2626 EXPORT_SYMBOL(qlt_xmit_response);
2627
2628 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2629 {
2630 struct ctio7_to_24xx *pkt;
2631 struct scsi_qla_host *vha = cmd->vha;
2632 struct qla_hw_data *ha = vha->hw;
2633 struct qla_tgt *tgt = cmd->tgt;
2634 struct qla_tgt_prm prm;
2635 unsigned long flags;
2636 int res = 0;
2637
2638 memset(&prm, 0, sizeof(prm));
2639 prm.cmd = cmd;
2640 prm.tgt = tgt;
2641 prm.sg = NULL;
2642 prm.req_cnt = 1;
2643
2644 /* Send marker if required */
2645 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2646 return -EIO;
2647
2648 /* Calculate number of entries and segments required */
2649 if (qlt_pci_map_calc_cnt(&prm) != 0)
2650 return -EAGAIN;
2651
2652 spin_lock_irqsave(&ha->hardware_lock, flags);
2653
2654 if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) ||
2655 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2656 /*
2657 * Either a chip reset is active or this request was from
2658 * previous life, just abort the processing.
2659 */
2660 cmd->state = QLA_TGT_STATE_NEED_DATA;
2661 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2662 ql_dbg(ql_dbg_async, vha, 0xe102,
2663 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2664 qla2x00_reset_active(vha), cmd->reset_count,
2665 ha->chip_reset);
2666 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2667 return 0;
2668 }
2669
2670 /* Does F/W have an IOCBs for this request */
2671 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2672 if (res != 0)
2673 goto out_unlock_free_unmap;
2674 if (cmd->se_cmd.prot_op)
2675 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2676 else
2677 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2678
2679 if (unlikely(res != 0)) {
2680 vha->req->cnt += prm.req_cnt;
2681 goto out_unlock_free_unmap;
2682 }
2683
2684 pkt = (struct ctio7_to_24xx *)prm.pkt;
2685 pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2686 CTIO7_FLAGS_STATUS_MODE_0);
2687
2688 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2689 qlt_load_data_segments(&prm, vha);
2690
2691 cmd->state = QLA_TGT_STATE_NEED_DATA;
2692 cmd->cmd_sent_to_fw = 1;
2693
2694 /* Memory Barrier */
2695 wmb();
2696 qla2x00_start_iocbs(vha, vha->req);
2697 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2698
2699 return res;
2700
2701 out_unlock_free_unmap:
2702 qlt_unmap_sg(vha, cmd);
2703 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2704
2705 return res;
2706 }
2707 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2708
2709
2710 /*
2711 * Checks the guard or meta-data for the type of error
2712 * detected by the HBA.
2713 */
2714 static inline int
2715 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2716 struct ctio_crc_from_fw *sts)
2717 {
2718 uint8_t *ap = &sts->actual_dif[0];
2719 uint8_t *ep = &sts->expected_dif[0];
2720 uint32_t e_ref_tag, a_ref_tag;
2721 uint16_t e_app_tag, a_app_tag;
2722 uint16_t e_guard, a_guard;
2723 uint64_t lba = cmd->se_cmd.t_task_lba;
2724
2725 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2726 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2727 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2728
2729 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2730 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2731 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2732
2733 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2734 "iocb(s) %p Returned STATUS.\n", sts);
2735
2736 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2737 "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2738 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2739 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2740
2741 /*
2742 * Ignore sector if:
2743 * For type 3: ref & app tag is all 'f's
2744 * For type 0,1,2: app tag is all 'f's
2745 */
2746 if ((a_app_tag == 0xffff) &&
2747 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2748 (a_ref_tag == 0xffffffff))) {
2749 uint32_t blocks_done;
2750
2751 /* 2TB boundary case covered automatically with this */
2752 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2753 cmd->se_cmd.bad_sector = e_ref_tag;
2754 cmd->se_cmd.pi_err = 0;
2755 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2756 "need to return scsi good\n");
2757
2758 /* Update protection tag */
2759 if (cmd->prot_sg_cnt) {
2760 uint32_t i, k = 0, num_ent;
2761 struct scatterlist *sg, *sgl;
2762
2763
2764 sgl = cmd->prot_sg;
2765
2766 /* Patch the corresponding protection tags */
2767 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2768 num_ent = sg_dma_len(sg) / 8;
2769 if (k + num_ent < blocks_done) {
2770 k += num_ent;
2771 continue;
2772 }
2773 k = blocks_done;
2774 break;
2775 }
2776
2777 if (k != blocks_done) {
2778 ql_log(ql_log_warn, vha, 0xf076,
2779 "unexpected tag values tag:lba=%u:%llu)\n",
2780 e_ref_tag, (unsigned long long)lba);
2781 goto out;
2782 }
2783
2784 #if 0
2785 struct sd_dif_tuple *spt;
2786 /* TODO:
2787 * This section came from initiator. Is it valid here?
2788 * should ulp be override with actual val???
2789 */
2790 spt = page_address(sg_page(sg)) + sg->offset;
2791 spt += j;
2792
2793 spt->app_tag = 0xffff;
2794 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2795 spt->ref_tag = 0xffffffff;
2796 #endif
2797 }
2798
2799 return 0;
2800 }
2801
2802 /* check guard */
2803 if (e_guard != a_guard) {
2804 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2805 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2806
2807 ql_log(ql_log_warn, vha, 0xe076,
2808 "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2809 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2810 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2811 a_guard, e_guard, cmd);
2812 goto out;
2813 }
2814
2815 /* check ref tag */
2816 if (e_ref_tag != a_ref_tag) {
2817 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2818 cmd->se_cmd.bad_sector = e_ref_tag;
2819
2820 ql_log(ql_log_warn, vha, 0xe077,
2821 "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2822 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2823 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2824 a_guard, e_guard, cmd);
2825 goto out;
2826 }
2827
2828 /* check appl tag */
2829 if (e_app_tag != a_app_tag) {
2830 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2831 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2832
2833 ql_log(ql_log_warn, vha, 0xe078,
2834 "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2835 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2836 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2837 a_guard, e_guard, cmd);
2838 goto out;
2839 }
2840 out:
2841 return 1;
2842 }
2843
2844
2845 /* If hardware_lock held on entry, might drop it, then reaquire */
2846 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2847 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2848 struct imm_ntfy_from_isp *ntfy)
2849 {
2850 struct nack_to_isp *nack;
2851 struct qla_hw_data *ha = vha->hw;
2852 request_t *pkt;
2853 int ret = 0;
2854
2855 ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
2856 "Sending TERM ELS CTIO (ha=%p)\n", ha);
2857
2858 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2859 if (pkt == NULL) {
2860 ql_dbg(ql_dbg_tgt, vha, 0xe080,
2861 "qla_target(%d): %s failed: unable to allocate "
2862 "request packet\n", vha->vp_idx, __func__);
2863 return -ENOMEM;
2864 }
2865
2866 pkt->entry_type = NOTIFY_ACK_TYPE;
2867 pkt->entry_count = 1;
2868 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2869
2870 nack = (struct nack_to_isp *)pkt;
2871 nack->ox_id = ntfy->ox_id;
2872
2873 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
2874 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
2875 nack->u.isp24.flags = ntfy->u.isp24.flags &
2876 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
2877 }
2878
2879 /* terminate */
2880 nack->u.isp24.flags |=
2881 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
2882
2883 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
2884 nack->u.isp24.status = ntfy->u.isp24.status;
2885 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
2886 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
2887 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
2888 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
2889 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
2890 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
2891
2892 qla2x00_start_iocbs(vha, vha->req);
2893 return ret;
2894 }
2895
2896 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2897 struct imm_ntfy_from_isp *imm, int ha_locked)
2898 {
2899 unsigned long flags = 0;
2900 int rc;
2901
2902 if (qlt_issue_marker(vha, ha_locked) < 0)
2903 return;
2904
2905 if (ha_locked) {
2906 rc = __qlt_send_term_imm_notif(vha, imm);
2907
2908 #if 0 /* Todo */
2909 if (rc == -ENOMEM)
2910 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2911 #endif
2912 goto done;
2913 }
2914
2915 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2916 rc = __qlt_send_term_imm_notif(vha, imm);
2917
2918 #if 0 /* Todo */
2919 if (rc == -ENOMEM)
2920 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2921 #endif
2922
2923 done:
2924 if (!ha_locked)
2925 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2926 }
2927
2928 /* If hardware_lock held on entry, might drop it, then reaquire */
2929 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2930 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2931 struct qla_tgt_cmd *cmd,
2932 struct atio_from_isp *atio)
2933 {
2934 struct ctio7_to_24xx *ctio24;
2935 struct qla_hw_data *ha = vha->hw;
2936 request_t *pkt;
2937 int ret = 0;
2938 uint16_t temp;
2939
2940 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2941
2942 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2943 if (pkt == NULL) {
2944 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2945 "qla_target(%d): %s failed: unable to allocate "
2946 "request packet\n", vha->vp_idx, __func__);
2947 return -ENOMEM;
2948 }
2949
2950 if (cmd != NULL) {
2951 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2952 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2953 "qla_target(%d): Terminating cmd %p with "
2954 "incorrect state %d\n", vha->vp_idx, cmd,
2955 cmd->state);
2956 } else
2957 ret = 1;
2958 }
2959
2960 pkt->entry_count = 1;
2961 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2962
2963 ctio24 = (struct ctio7_to_24xx *)pkt;
2964 ctio24->entry_type = CTIO_TYPE7;
2965 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2966 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2967 ctio24->vp_index = vha->vp_idx;
2968 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2969 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2970 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2971 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2972 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2973 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2974 CTIO7_FLAGS_TERMINATE);
2975 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2976 ctio24->u.status1.ox_id = cpu_to_le16(temp);
2977
2978 /* Most likely, it isn't needed */
2979 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2980 &atio->u.isp24.fcp_cmnd.add_cdb[
2981 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2982 if (ctio24->u.status1.residual != 0)
2983 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2984
2985 /* Memory Barrier */
2986 wmb();
2987 qla2x00_start_iocbs(vha, vha->req);
2988 return ret;
2989 }
2990
2991 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2992 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2993 {
2994 unsigned long flags = 0;
2995 int rc;
2996
2997 if (qlt_issue_marker(vha, ha_locked) < 0)
2998 return;
2999
3000 if (ha_locked) {
3001 rc = __qlt_send_term_exchange(vha, cmd, atio);
3002 if (rc == -ENOMEM)
3003 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3004 goto done;
3005 }
3006 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3007 rc = __qlt_send_term_exchange(vha, cmd, atio);
3008 if (rc == -ENOMEM)
3009 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3010
3011 done:
3012 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
3013 !cmd->cmd_sent_to_fw)) {
3014 if (cmd->sg_mapped)
3015 qlt_unmap_sg(vha, cmd);
3016 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3017 }
3018
3019 if (!ha_locked)
3020 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3021
3022 return;
3023 }
3024
3025 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3026 {
3027 struct list_head free_list;
3028 struct qla_tgt_cmd *cmd, *tcmd;
3029
3030 vha->hw->tgt.leak_exchg_thresh_hold =
3031 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3032
3033 cmd = tcmd = NULL;
3034 if (!list_empty(&vha->hw->tgt.q_full_list)) {
3035 INIT_LIST_HEAD(&free_list);
3036 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3037
3038 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3039 list_del(&cmd->cmd_list);
3040 /* This cmd was never sent to TCM. There is no need
3041 * to schedule free or call free_cmd
3042 */
3043 qlt_free_cmd(cmd);
3044 vha->hw->tgt.num_qfull_cmds_alloc--;
3045 }
3046 }
3047 vha->hw->tgt.num_qfull_cmds_dropped = 0;
3048 }
3049
3050 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3051 {
3052 uint32_t total_leaked;
3053
3054 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3055
3056 if (vha->hw->tgt.leak_exchg_thresh_hold &&
3057 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3058
3059 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3060 "Chip reset due to exchange starvation: %d/%d.\n",
3061 total_leaked, vha->hw->fw_xcb_count);
3062
3063 if (IS_P3P_TYPE(vha->hw))
3064 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3065 else
3066 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3067 qla2xxx_wake_dpc(vha);
3068 }
3069
3070 }
3071
3072 void qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3073 {
3074 struct qla_tgt *tgt = cmd->tgt;
3075 struct scsi_qla_host *vha = tgt->vha;
3076 struct se_cmd *se_cmd = &cmd->se_cmd;
3077
3078 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3079 "qla_target(%d): terminating exchange for aborted cmd=%p "
3080 "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3081 se_cmd->tag);
3082
3083 cmd->state = QLA_TGT_STATE_ABORTED;
3084 cmd->cmd_flags |= BIT_6;
3085
3086 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
3087 }
3088 EXPORT_SYMBOL(qlt_abort_cmd);
3089
3090 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3091 {
3092 struct qla_tgt_sess *sess = cmd->sess;
3093
3094 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3095 "%s: se_cmd[%p] ox_id %04x\n",
3096 __func__, &cmd->se_cmd,
3097 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3098
3099 BUG_ON(cmd->cmd_in_wq);
3100
3101 if (!cmd->q_full)
3102 qlt_decr_num_pend_cmds(cmd->vha);
3103
3104 BUG_ON(cmd->sg_mapped);
3105 cmd->jiffies_at_free = get_jiffies_64();
3106 if (unlikely(cmd->free_sg))
3107 kfree(cmd->sg);
3108
3109 if (!sess || !sess->se_sess) {
3110 WARN_ON(1);
3111 return;
3112 }
3113 cmd->jiffies_at_free = get_jiffies_64();
3114 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3115 }
3116 EXPORT_SYMBOL(qlt_free_cmd);
3117
3118 /* ha->hardware_lock supposed to be held on entry */
3119 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3120 struct qla_tgt_cmd *cmd, void *ctio)
3121 {
3122 struct qla_tgt_srr_ctio *sc;
3123 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3124 struct qla_tgt_srr_imm *imm;
3125
3126 tgt->ctio_srr_id++;
3127 cmd->cmd_flags |= BIT_15;
3128
3129 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3130 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3131
3132 if (!ctio) {
3133 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3134 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3135 vha->vp_idx);
3136 return -EINVAL;
3137 }
3138
3139 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3140 if (sc != NULL) {
3141 sc->cmd = cmd;
3142 /* IRQ is already OFF */
3143 spin_lock(&tgt->srr_lock);
3144 sc->srr_id = tgt->ctio_srr_id;
3145 list_add_tail(&sc->srr_list_entry,
3146 &tgt->srr_ctio_list);
3147 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3148 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3149 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3150 int found = 0;
3151 list_for_each_entry(imm, &tgt->srr_imm_list,
3152 srr_list_entry) {
3153 if (imm->srr_id == sc->srr_id) {
3154 found = 1;
3155 break;
3156 }
3157 }
3158 if (found) {
3159 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3160 "Scheduling srr work\n");
3161 schedule_work(&tgt->srr_work);
3162 } else {
3163 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3164 "qla_target(%d): imm_srr_id "
3165 "== ctio_srr_id (%d), but there is no "
3166 "corresponding SRR IMM, deleting CTIO "
3167 "SRR %p\n", vha->vp_idx,
3168 tgt->ctio_srr_id, sc);
3169 list_del(&sc->srr_list_entry);
3170 spin_unlock(&tgt->srr_lock);
3171
3172 kfree(sc);
3173 return -EINVAL;
3174 }
3175 }
3176 spin_unlock(&tgt->srr_lock);
3177 } else {
3178 struct qla_tgt_srr_imm *ti;
3179
3180 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3181 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3182 vha->vp_idx);
3183 spin_lock(&tgt->srr_lock);
3184 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3185 srr_list_entry) {
3186 if (imm->srr_id == tgt->ctio_srr_id) {
3187 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3188 "IMM SRR %p deleted (id %d)\n",
3189 imm, imm->srr_id);
3190 list_del(&imm->srr_list_entry);
3191 qlt_reject_free_srr_imm(vha, imm, 1);
3192 }
3193 }
3194 spin_unlock(&tgt->srr_lock);
3195
3196 return -ENOMEM;
3197 }
3198
3199 return 0;
3200 }
3201
3202 /*
3203 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3204 */
3205 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3206 struct qla_tgt_cmd *cmd, uint32_t status)
3207 {
3208 int term = 0;
3209
3210 if (ctio != NULL) {
3211 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3212 term = !(c->flags &
3213 cpu_to_le16(OF_TERM_EXCH));
3214 } else
3215 term = 1;
3216
3217 if (term)
3218 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3219
3220 return term;
3221 }
3222
3223 /* ha->hardware_lock supposed to be held on entry */
3224 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3225 uint32_t handle)
3226 {
3227 struct qla_hw_data *ha = vha->hw;
3228
3229 handle--;
3230 if (ha->tgt.cmds[handle] != NULL) {
3231 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3232 ha->tgt.cmds[handle] = NULL;
3233 return cmd;
3234 } else
3235 return NULL;
3236 }
3237
3238 /* ha->hardware_lock supposed to be held on entry */
3239 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3240 uint32_t handle, void *ctio)
3241 {
3242 struct qla_tgt_cmd *cmd = NULL;
3243
3244 /* Clear out internal marks */
3245 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3246 CTIO_INTERMEDIATE_HANDLE_MARK);
3247
3248 if (handle != QLA_TGT_NULL_HANDLE) {
3249 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3250 return NULL;
3251
3252 /* handle-1 is actually used */
3253 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3254 ql_dbg(ql_dbg_tgt, vha, 0xe052,
3255 "qla_target(%d): Wrong handle %x received\n",
3256 vha->vp_idx, handle);
3257 return NULL;
3258 }
3259 cmd = qlt_get_cmd(vha, handle);
3260 if (unlikely(cmd == NULL)) {
3261 ql_dbg(ql_dbg_tgt, vha, 0xe053,
3262 "qla_target(%d): Suspicious: unable to "
3263 "find the command with handle %x\n", vha->vp_idx,
3264 handle);
3265 return NULL;
3266 }
3267 } else if (ctio != NULL) {
3268 /* We can't get loop ID from CTIO7 */
3269 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3270 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3271 "support NULL handles\n", vha->vp_idx);
3272 return NULL;
3273 }
3274
3275 return cmd;
3276 }
3277
3278 /* hardware_lock should be held by caller. */
3279 static void
3280 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3281 {
3282 struct qla_hw_data *ha = vha->hw;
3283 uint32_t handle;
3284
3285 if (cmd->sg_mapped)
3286 qlt_unmap_sg(vha, cmd);
3287
3288 handle = qlt_make_handle(vha);
3289
3290 /* TODO: fix debug message type and ids. */
3291 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3292 ql_dbg(ql_dbg_io, vha, 0xff00,
3293 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3294 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3295 cmd->write_data_transferred = 0;
3296 cmd->state = QLA_TGT_STATE_DATA_IN;
3297
3298 ql_dbg(ql_dbg_io, vha, 0xff01,
3299 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3300
3301 ha->tgt.tgt_ops->handle_data(cmd);
3302 return;
3303 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3304 ql_dbg(ql_dbg_io, vha, 0xff02,
3305 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3306 } else {
3307 ql_dbg(ql_dbg_io, vha, 0xff03,
3308 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3309 cmd->state);
3310 dump_stack();
3311 }
3312
3313 cmd->cmd_flags |= BIT_17;
3314 ha->tgt.tgt_ops->free_cmd(cmd);
3315 }
3316
3317 void
3318 qlt_host_reset_handler(struct qla_hw_data *ha)
3319 {
3320 struct qla_tgt_cmd *cmd;
3321 unsigned long flags;
3322 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3323 scsi_qla_host_t *vha = NULL;
3324 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3325 uint32_t i;
3326
3327 if (!base_vha->hw->tgt.tgt_ops)
3328 return;
3329
3330 if (!tgt || qla_ini_mode_enabled(base_vha)) {
3331 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3332 "Target mode disabled\n");
3333 return;
3334 }
3335
3336 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3337 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3338 base_vha->dpc_flags);
3339
3340 spin_lock_irqsave(&ha->hardware_lock, flags);
3341 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3342 cmd = qlt_get_cmd(base_vha, i);
3343 if (!cmd)
3344 continue;
3345 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3346 vha = cmd->vha;
3347 qlt_abort_cmd_on_host_reset(vha, cmd);
3348 }
3349 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3350 }
3351
3352
3353 /*
3354 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3355 */
3356 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3357 uint32_t status, void *ctio)
3358 {
3359 struct qla_hw_data *ha = vha->hw;
3360 struct se_cmd *se_cmd;
3361 struct qla_tgt_cmd *cmd;
3362
3363 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3364 /* That could happen only in case of an error/reset/abort */
3365 if (status != CTIO_SUCCESS) {
3366 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3367 "Intermediate CTIO received"
3368 " (status %x)\n", status);
3369 }
3370 return;
3371 }
3372
3373 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3374 if (cmd == NULL)
3375 return;
3376
3377 se_cmd = &cmd->se_cmd;
3378 cmd->cmd_sent_to_fw = 0;
3379
3380 qlt_unmap_sg(vha, cmd);
3381
3382 if (unlikely(status != CTIO_SUCCESS)) {
3383 switch (status & 0xFFFF) {
3384 case CTIO_LIP_RESET:
3385 case CTIO_TARGET_RESET:
3386 case CTIO_ABORTED:
3387 /* driver request abort via Terminate exchange */
3388 case CTIO_TIMEOUT:
3389 case CTIO_INVALID_RX_ID:
3390 /* They are OK */
3391 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3392 "qla_target(%d): CTIO with "
3393 "status %#x received, state %x, se_cmd %p, "
3394 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3395 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3396 status, cmd->state, se_cmd);
3397 break;
3398
3399 case CTIO_PORT_LOGGED_OUT:
3400 case CTIO_PORT_UNAVAILABLE:
3401 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3402 "qla_target(%d): CTIO with PORT LOGGED "
3403 "OUT (29) or PORT UNAVAILABLE (28) status %x "
3404 "received (state %x, se_cmd %p)\n", vha->vp_idx,
3405 status, cmd->state, se_cmd);
3406 break;
3407
3408 case CTIO_SRR_RECEIVED:
3409 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3410 "qla_target(%d): CTIO with SRR_RECEIVED"
3411 " status %x received (state %x, se_cmd %p)\n",
3412 vha->vp_idx, status, cmd->state, se_cmd);
3413 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3414 break;
3415 else
3416 return;
3417
3418 case CTIO_DIF_ERROR: {
3419 struct ctio_crc_from_fw *crc =
3420 (struct ctio_crc_from_fw *)ctio;
3421 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3422 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3423 vha->vp_idx, status, cmd->state, se_cmd,
3424 *((u64 *)&crc->actual_dif[0]),
3425 *((u64 *)&crc->expected_dif[0]));
3426
3427 if (qlt_handle_dif_error(vha, cmd, ctio)) {
3428 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3429 /* scsi Write/xfer rdy complete */
3430 goto skip_term;
3431 } else {
3432 /* scsi read/xmit respond complete
3433 * call handle dif to send scsi status
3434 * rather than terminate exchange.
3435 */
3436 cmd->state = QLA_TGT_STATE_PROCESSED;
3437 ha->tgt.tgt_ops->handle_dif_err(cmd);
3438 return;
3439 }
3440 } else {
3441 /* Need to generate a SCSI good completion.
3442 * because FW did not send scsi status.
3443 */
3444 status = 0;
3445 goto skip_term;
3446 }
3447 break;
3448 }
3449 default:
3450 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3451 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3452 vha->vp_idx, status, cmd->state, se_cmd);
3453 break;
3454 }
3455
3456
3457 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3458 * cmd is already aborted/terminated, we don't
3459 * need to terminate again. The exchange is already
3460 * cleaned up/freed at FW level. Just cleanup at driver
3461 * level.
3462 */
3463 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3464 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3465 cmd->cmd_flags |= BIT_13;
3466 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3467 return;
3468 }
3469 }
3470 skip_term:
3471
3472 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3473 cmd->cmd_flags |= BIT_12;
3474 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3475 cmd->state = QLA_TGT_STATE_DATA_IN;
3476
3477 if (status == CTIO_SUCCESS)
3478 cmd->write_data_transferred = 1;
3479
3480 ha->tgt.tgt_ops->handle_data(cmd);
3481 return;
3482 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3483 cmd->cmd_flags |= BIT_18;
3484 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3485 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3486 } else {
3487 cmd->cmd_flags |= BIT_19;
3488 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3489 "qla_target(%d): A command in state (%d) should "
3490 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3491 }
3492
3493 if (unlikely(status != CTIO_SUCCESS) &&
3494 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3495 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3496 dump_stack();
3497 }
3498
3499 ha->tgt.tgt_ops->free_cmd(cmd);
3500 }
3501
3502 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3503 uint8_t task_codes)
3504 {
3505 int fcp_task_attr;
3506
3507 switch (task_codes) {
3508 case ATIO_SIMPLE_QUEUE:
3509 fcp_task_attr = TCM_SIMPLE_TAG;
3510 break;
3511 case ATIO_HEAD_OF_QUEUE:
3512 fcp_task_attr = TCM_HEAD_TAG;
3513 break;
3514 case ATIO_ORDERED_QUEUE:
3515 fcp_task_attr = TCM_ORDERED_TAG;
3516 break;
3517 case ATIO_ACA_QUEUE:
3518 fcp_task_attr = TCM_ACA_TAG;
3519 break;
3520 case ATIO_UNTAGGED:
3521 fcp_task_attr = TCM_SIMPLE_TAG;
3522 break;
3523 default:
3524 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3525 "qla_target: unknown task code %x, use ORDERED instead\n",
3526 task_codes);
3527 fcp_task_attr = TCM_ORDERED_TAG;
3528 break;
3529 }
3530
3531 return fcp_task_attr;
3532 }
3533
3534 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3535 uint8_t *);
3536 /*
3537 * Process context for I/O path into tcm_qla2xxx code
3538 */
3539 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3540 {
3541 scsi_qla_host_t *vha = cmd->vha;
3542 struct qla_hw_data *ha = vha->hw;
3543 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3544 struct qla_tgt_sess *sess = cmd->sess;
3545 struct atio_from_isp *atio = &cmd->atio;
3546 unsigned char *cdb;
3547 unsigned long flags;
3548 uint32_t data_length;
3549 int ret, fcp_task_attr, data_dir, bidi = 0;
3550
3551 cmd->cmd_in_wq = 0;
3552 cmd->cmd_flags |= BIT_1;
3553 if (tgt->tgt_stop)
3554 goto out_term;
3555
3556 if (cmd->state == QLA_TGT_STATE_ABORTED) {
3557 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3558 "cmd with tag %u is aborted\n",
3559 cmd->atio.u.isp24.exchange_addr);
3560 goto out_term;
3561 }
3562
3563 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3564 cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3565 cmd->unpacked_lun = scsilun_to_int(
3566 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3567
3568 if (atio->u.isp24.fcp_cmnd.rddata &&
3569 atio->u.isp24.fcp_cmnd.wrdata) {
3570 bidi = 1;
3571 data_dir = DMA_TO_DEVICE;
3572 } else if (atio->u.isp24.fcp_cmnd.rddata)
3573 data_dir = DMA_FROM_DEVICE;
3574 else if (atio->u.isp24.fcp_cmnd.wrdata)
3575 data_dir = DMA_TO_DEVICE;
3576 else
3577 data_dir = DMA_NONE;
3578
3579 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3580 atio->u.isp24.fcp_cmnd.task_attr);
3581 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3582 &atio->u.isp24.fcp_cmnd.add_cdb[
3583 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3584
3585 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3586 fcp_task_attr, data_dir, bidi);
3587 if (ret != 0)
3588 goto out_term;
3589 /*
3590 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3591 */
3592 spin_lock_irqsave(&ha->hardware_lock, flags);
3593 ha->tgt.tgt_ops->put_sess(sess);
3594 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3595 return;
3596
3597 out_term:
3598 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3599 /*
3600 * cmd has not sent to target yet, so pass NULL as the second
3601 * argument to qlt_send_term_exchange() and free the memory here.
3602 */
3603 cmd->cmd_flags |= BIT_2;
3604 spin_lock_irqsave(&ha->hardware_lock, flags);
3605 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3606
3607 qlt_decr_num_pend_cmds(vha);
3608 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3609 ha->tgt.tgt_ops->put_sess(sess);
3610 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3611 }
3612
3613 static void qlt_do_work(struct work_struct *work)
3614 {
3615 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3616 scsi_qla_host_t *vha = cmd->vha;
3617 unsigned long flags;
3618
3619 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3620 list_del(&cmd->cmd_list);
3621 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3622
3623 __qlt_do_work(cmd);
3624 }
3625
3626 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3627 struct qla_tgt_sess *sess,
3628 struct atio_from_isp *atio)
3629 {
3630 struct se_session *se_sess = sess->se_sess;
3631 struct qla_tgt_cmd *cmd;
3632 int tag;
3633
3634 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3635 if (tag < 0)
3636 return NULL;
3637
3638 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3639 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3640
3641 memcpy(&cmd->atio, atio, sizeof(*atio));
3642 cmd->state = QLA_TGT_STATE_NEW;
3643 cmd->tgt = vha->vha_tgt.qla_tgt;
3644 qlt_incr_num_pend_cmds(vha);
3645 cmd->vha = vha;
3646 cmd->se_cmd.map_tag = tag;
3647 cmd->sess = sess;
3648 cmd->loop_id = sess->loop_id;
3649 cmd->conf_compl_supported = sess->conf_compl_supported;
3650
3651 cmd->cmd_flags = 0;
3652 cmd->jiffies_at_alloc = get_jiffies_64();
3653
3654 cmd->reset_count = vha->hw->chip_reset;
3655
3656 return cmd;
3657 }
3658
3659 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3660 uint16_t);
3661
3662 static void qlt_create_sess_from_atio(struct work_struct *work)
3663 {
3664 struct qla_tgt_sess_op *op = container_of(work,
3665 struct qla_tgt_sess_op, work);
3666 scsi_qla_host_t *vha = op->vha;
3667 struct qla_hw_data *ha = vha->hw;
3668 struct qla_tgt_sess *sess;
3669 struct qla_tgt_cmd *cmd;
3670 unsigned long flags;
3671 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3672
3673 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3674 list_del(&op->cmd_list);
3675 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3676
3677 if (op->aborted) {
3678 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3679 "sess_op with tag %u is aborted\n",
3680 op->atio.u.isp24.exchange_addr);
3681 goto out_term;
3682 }
3683
3684 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3685 "qla_target(%d): Unable to find wwn login"
3686 " (s_id %x:%x:%x), trying to create it manually\n",
3687 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3688
3689 if (op->atio.u.raw.entry_count > 1) {
3690 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3691 "Dropping multy entry atio %p\n", &op->atio);
3692 goto out_term;
3693 }
3694
3695 mutex_lock(&vha->vha_tgt.tgt_mutex);
3696 sess = qlt_make_local_sess(vha, s_id);
3697 /* sess has an extra creation ref. */
3698 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3699
3700 if (!sess)
3701 goto out_term;
3702 /*
3703 * Now obtain a pre-allocated session tag using the original op->atio
3704 * packet header, and dispatch into __qlt_do_work() using the existing
3705 * process context.
3706 */
3707 cmd = qlt_get_tag(vha, sess, &op->atio);
3708 if (!cmd) {
3709 spin_lock_irqsave(&ha->hardware_lock, flags);
3710 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3711 ha->tgt.tgt_ops->put_sess(sess);
3712 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3713 kfree(op);
3714 return;
3715 }
3716 /*
3717 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3718 * the extra reference taken above by qlt_make_local_sess()
3719 */
3720 __qlt_do_work(cmd);
3721 kfree(op);
3722 return;
3723
3724 out_term:
3725 spin_lock_irqsave(&ha->hardware_lock, flags);
3726 qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3727 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3728 kfree(op);
3729
3730 }
3731
3732 /* ha->hardware_lock supposed to be held on entry */
3733 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3734 struct atio_from_isp *atio)
3735 {
3736 struct qla_hw_data *ha = vha->hw;
3737 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3738 struct qla_tgt_sess *sess;
3739 struct qla_tgt_cmd *cmd;
3740
3741 if (unlikely(tgt->tgt_stop)) {
3742 ql_dbg(ql_dbg_io, vha, 0x3061,
3743 "New command while device %p is shutting down\n", tgt);
3744 return -EFAULT;
3745 }
3746
3747 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3748 if (unlikely(!sess)) {
3749 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3750 GFP_ATOMIC);
3751 if (!op)
3752 return -ENOMEM;
3753
3754 memcpy(&op->atio, atio, sizeof(*atio));
3755 op->vha = vha;
3756
3757 spin_lock(&vha->cmd_list_lock);
3758 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3759 spin_unlock(&vha->cmd_list_lock);
3760
3761 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3762 queue_work(qla_tgt_wq, &op->work);
3763 return 0;
3764 }
3765
3766 /* Another WWN used to have our s_id. Our PLOGI scheduled its
3767 * session deletion, but it's still in sess_del_work wq */
3768 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3769 ql_dbg(ql_dbg_io, vha, 0x3061,
3770 "New command while old session %p is being deleted\n",
3771 sess);
3772 return -EFAULT;
3773 }
3774
3775 /*
3776 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3777 */
3778 kref_get(&sess->se_sess->sess_kref);
3779
3780 cmd = qlt_get_tag(vha, sess, atio);
3781 if (!cmd) {
3782 ql_dbg(ql_dbg_io, vha, 0x3062,
3783 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3784 ha->tgt.tgt_ops->put_sess(sess);
3785 return -ENOMEM;
3786 }
3787
3788 cmd->cmd_in_wq = 1;
3789 cmd->cmd_flags |= BIT_0;
3790
3791 spin_lock(&vha->cmd_list_lock);
3792 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
3793 spin_unlock(&vha->cmd_list_lock);
3794
3795 INIT_WORK(&cmd->work, qlt_do_work);
3796 queue_work(qla_tgt_wq, &cmd->work);
3797 return 0;
3798
3799 }
3800
3801 /* ha->hardware_lock supposed to be held on entry */
3802 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3803 int fn, void *iocb, int flags)
3804 {
3805 struct scsi_qla_host *vha = sess->vha;
3806 struct qla_hw_data *ha = vha->hw;
3807 struct qla_tgt_mgmt_cmd *mcmd;
3808 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3809 int res;
3810 uint8_t tmr_func;
3811
3812 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3813 if (!mcmd) {
3814 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3815 "qla_target(%d): Allocation of management "
3816 "command failed, some commands and their data could "
3817 "leak\n", vha->vp_idx);
3818 return -ENOMEM;
3819 }
3820 memset(mcmd, 0, sizeof(*mcmd));
3821 mcmd->sess = sess;
3822
3823 if (iocb) {
3824 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3825 sizeof(mcmd->orig_iocb.imm_ntfy));
3826 }
3827 mcmd->tmr_func = fn;
3828 mcmd->flags = flags;
3829 mcmd->reset_count = vha->hw->chip_reset;
3830
3831 switch (fn) {
3832 case QLA_TGT_CLEAR_ACA:
3833 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3834 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3835 tmr_func = TMR_CLEAR_ACA;
3836 break;
3837
3838 case QLA_TGT_TARGET_RESET:
3839 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3840 "qla_target(%d): TARGET_RESET received\n",
3841 sess->vha->vp_idx);
3842 tmr_func = TMR_TARGET_WARM_RESET;
3843 break;
3844
3845 case QLA_TGT_LUN_RESET:
3846 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3847 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3848 tmr_func = TMR_LUN_RESET;
3849 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
3850 break;
3851
3852 case QLA_TGT_CLEAR_TS:
3853 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3854 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3855 tmr_func = TMR_CLEAR_TASK_SET;
3856 break;
3857
3858 case QLA_TGT_ABORT_TS:
3859 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3860 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3861 tmr_func = TMR_ABORT_TASK_SET;
3862 break;
3863 #if 0
3864 case QLA_TGT_ABORT_ALL:
3865 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3866 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3867 sess->vha->vp_idx);
3868 tmr_func = 0;
3869 break;
3870
3871 case QLA_TGT_ABORT_ALL_SESS:
3872 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3873 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3874 sess->vha->vp_idx);
3875 tmr_func = 0;
3876 break;
3877
3878 case QLA_TGT_NEXUS_LOSS_SESS:
3879 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3880 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3881 sess->vha->vp_idx);
3882 tmr_func = 0;
3883 break;
3884
3885 case QLA_TGT_NEXUS_LOSS:
3886 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3887 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3888 tmr_func = 0;
3889 break;
3890 #endif
3891 default:
3892 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3893 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3894 sess->vha->vp_idx, fn);
3895 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3896 return -ENOSYS;
3897 }
3898
3899 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3900 if (res != 0) {
3901 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3902 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3903 sess->vha->vp_idx, res);
3904 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3905 return -EFAULT;
3906 }
3907
3908 return 0;
3909 }
3910
3911 /* ha->hardware_lock supposed to be held on entry */
3912 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3913 {
3914 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3915 struct qla_hw_data *ha = vha->hw;
3916 struct qla_tgt *tgt;
3917 struct qla_tgt_sess *sess;
3918 uint32_t lun, unpacked_lun;
3919 int fn;
3920
3921 tgt = vha->vha_tgt.qla_tgt;
3922
3923 lun = a->u.isp24.fcp_cmnd.lun;
3924 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3925 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3926 a->u.isp24.fcp_hdr.s_id);
3927 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3928
3929 if (!sess) {
3930 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3931 "qla_target(%d): task mgmt fn 0x%x for "
3932 "non-existant session\n", vha->vp_idx, fn);
3933 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3934 sizeof(struct atio_from_isp));
3935 }
3936
3937 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
3938 return -EFAULT;
3939
3940 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3941 }
3942
3943 /* ha->hardware_lock supposed to be held on entry */
3944 static int __qlt_abort_task(struct scsi_qla_host *vha,
3945 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3946 {
3947 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3948 struct qla_hw_data *ha = vha->hw;
3949 struct qla_tgt_mgmt_cmd *mcmd;
3950 uint32_t lun, unpacked_lun;
3951 int rc;
3952
3953 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3954 if (mcmd == NULL) {
3955 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3956 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3957 vha->vp_idx, __func__);
3958 return -ENOMEM;
3959 }
3960 memset(mcmd, 0, sizeof(*mcmd));
3961
3962 mcmd->sess = sess;
3963 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3964 sizeof(mcmd->orig_iocb.imm_ntfy));
3965
3966 lun = a->u.isp24.fcp_cmnd.lun;
3967 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3968 mcmd->reset_count = vha->hw->chip_reset;
3969
3970 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3971 le16_to_cpu(iocb->u.isp2x.seq_id));
3972 if (rc != 0) {
3973 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3974 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3975 vha->vp_idx, rc);
3976 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3977 return -EFAULT;
3978 }
3979
3980 return 0;
3981 }
3982
3983 /* ha->hardware_lock supposed to be held on entry */
3984 static int qlt_abort_task(struct scsi_qla_host *vha,
3985 struct imm_ntfy_from_isp *iocb)
3986 {
3987 struct qla_hw_data *ha = vha->hw;
3988 struct qla_tgt_sess *sess;
3989 int loop_id;
3990
3991 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3992
3993 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3994 if (sess == NULL) {
3995 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3996 "qla_target(%d): task abort for unexisting "
3997 "session\n", vha->vp_idx);
3998 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3999 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4000 }
4001
4002 return __qlt_abort_task(vha, iocb, sess);
4003 }
4004
4005 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4006 {
4007 if (fcport->tgt_session) {
4008 if (rc != MBS_COMMAND_COMPLETE) {
4009 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4010 "%s: se_sess %p / sess %p from"
4011 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4012 " LOGO failed: %#x\n",
4013 __func__,
4014 fcport->tgt_session->se_sess,
4015 fcport->tgt_session,
4016 fcport->port_name, fcport->loop_id,
4017 fcport->d_id.b.domain, fcport->d_id.b.area,
4018 fcport->d_id.b.al_pa, rc);
4019 }
4020
4021 fcport->tgt_session->logout_completed = 1;
4022 }
4023 }
4024
4025 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a,
4026 struct imm_ntfy_from_isp *b)
4027 {
4028 struct imm_ntfy_from_isp tmp;
4029 memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp));
4030 memcpy(a, b, sizeof(struct imm_ntfy_from_isp));
4031 memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp));
4032 }
4033
4034 /*
4035 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4036 *
4037 * Schedules sessions with matching port_id/loop_id but different wwn for
4038 * deletion. Returns existing session with matching wwn if present.
4039 * Null otherwise.
4040 */
4041 static struct qla_tgt_sess *
4042 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4043 port_id_t port_id, uint16_t loop_id)
4044 {
4045 struct qla_tgt_sess *sess = NULL, *other_sess;
4046 uint64_t other_wwn;
4047
4048 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4049
4050 other_wwn = wwn_to_u64(other_sess->port_name);
4051
4052 if (wwn == other_wwn) {
4053 WARN_ON(sess);
4054 sess = other_sess;
4055 continue;
4056 }
4057
4058 /* find other sess with nport_id collision */
4059 if (port_id.b24 == other_sess->s_id.b24) {
4060 if (loop_id != other_sess->loop_id) {
4061 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4062 "Invalidating sess %p loop_id %d wwn %llx.\n",
4063 other_sess, other_sess->loop_id, other_wwn);
4064
4065 /*
4066 * logout_on_delete is set by default, but another
4067 * session that has the same s_id/loop_id combo
4068 * might have cleared it when requested this session
4069 * deletion, so don't touch it
4070 */
4071 qlt_schedule_sess_for_deletion(other_sess, true);
4072 } else {
4073 /*
4074 * Another wwn used to have our s_id/loop_id
4075 * combo - kill the session, but don't log out
4076 */
4077 sess->logout_on_delete = 0;
4078 qlt_schedule_sess_for_deletion(other_sess,
4079 true);
4080 }
4081 continue;
4082 }
4083
4084 /* find other sess with nport handle collision */
4085 if (loop_id == other_sess->loop_id) {
4086 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4087 "Invalidating sess %p loop_id %d wwn %llx.\n",
4088 other_sess, other_sess->loop_id, other_wwn);
4089
4090 /* Same loop_id but different s_id
4091 * Ok to kill and logout */
4092 qlt_schedule_sess_for_deletion(other_sess, true);
4093 }
4094 }
4095
4096 return sess;
4097 }
4098
4099 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4100 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4101 {
4102 struct qla_tgt_sess_op *op;
4103 struct qla_tgt_cmd *cmd;
4104 uint32_t key;
4105 int count = 0;
4106
4107 key = (((u32)s_id->b.domain << 16) |
4108 ((u32)s_id->b.area << 8) |
4109 ((u32)s_id->b.al_pa));
4110
4111 spin_lock(&vha->cmd_list_lock);
4112 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4113 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4114 if (op_key == key) {
4115 op->aborted = true;
4116 count++;
4117 }
4118 }
4119 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4120 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4121 if (cmd_key == key) {
4122 cmd->state = QLA_TGT_STATE_ABORTED;
4123 count++;
4124 }
4125 }
4126 spin_unlock(&vha->cmd_list_lock);
4127
4128 return count;
4129 }
4130
4131 /*
4132 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4133 */
4134 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4135 struct imm_ntfy_from_isp *iocb)
4136 {
4137 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4138 struct qla_hw_data *ha = vha->hw;
4139 struct qla_tgt_sess *sess = NULL;
4140 uint64_t wwn;
4141 port_id_t port_id;
4142 uint16_t loop_id;
4143 uint16_t wd3_lo;
4144 int res = 0;
4145
4146 wwn = wwn_to_u64(iocb->u.isp24.port_name);
4147
4148 port_id.b.domain = iocb->u.isp24.port_id[2];
4149 port_id.b.area = iocb->u.isp24.port_id[1];
4150 port_id.b.al_pa = iocb->u.isp24.port_id[0];
4151 port_id.b.rsvd_1 = 0;
4152
4153 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4154
4155 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4156 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4157 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4158
4159 /* res = 1 means ack at the end of thread
4160 * res = 0 means ack async/later.
4161 */
4162 switch (iocb->u.isp24.status_subcode) {
4163 case ELS_PLOGI:
4164
4165 /* Mark all stale commands in qla_tgt_wq for deletion */
4166 abort_cmds_for_s_id(vha, &port_id);
4167
4168 if (wwn)
4169 sess = qlt_find_sess_invalidate_other(tgt, wwn,
4170 port_id, loop_id);
4171
4172 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) {
4173 res = 1;
4174 break;
4175 }
4176
4177 if (sess->plogi_ack_needed) {
4178 /*
4179 * Initiator sent another PLOGI before last PLOGI could
4180 * finish. Swap plogi iocbs and terminate old one
4181 * without acking, new one will get acked when session
4182 * deletion completes.
4183 */
4184 ql_log(ql_log_warn, sess->vha, 0xf094,
4185 "sess %p received double plogi.\n", sess);
4186
4187 qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb);
4188
4189 qlt_send_term_imm_notif(vha, iocb, 1);
4190
4191 res = 0;
4192 break;
4193 }
4194
4195 res = 0;
4196
4197 /*
4198 * Save immediate Notif IOCB for Ack when sess is done
4199 * and being deleted.
4200 */
4201 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb));
4202 sess->plogi_ack_needed = 1;
4203
4204 /*
4205 * Under normal circumstances we want to release nport handle
4206 * during LOGO process to avoid nport handle leaks inside FW.
4207 * The exception is when LOGO is done while another PLOGI with
4208 * the same nport handle is waiting as might be the case here.
4209 * Note: there is always a possibily of a race where session
4210 * deletion has already started for other reasons (e.g. ACL
4211 * removal) and now PLOGI arrives:
4212 * 1. if PLOGI arrived in FW after nport handle has been freed,
4213 * FW must have assigned this PLOGI a new/same handle and we
4214 * can proceed ACK'ing it as usual when session deletion
4215 * completes.
4216 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4217 * bit reached it, the handle has now been released. We'll
4218 * get an error when we ACK this PLOGI. Nothing will be sent
4219 * back to initiator. Initiator should eventually retry
4220 * PLOGI and situation will correct itself.
4221 */
4222 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4223 (sess->s_id.b24 == port_id.b24));
4224 qlt_schedule_sess_for_deletion(sess, true);
4225 break;
4226
4227 case ELS_PRLI:
4228 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4229
4230 if (wwn)
4231 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4232 loop_id);
4233
4234 if (sess != NULL) {
4235 if (sess->deleted) {
4236 /*
4237 * Impatient initiator sent PRLI before last
4238 * PLOGI could finish. Will force him to re-try,
4239 * while last one finishes.
4240 */
4241 ql_log(ql_log_warn, sess->vha, 0xf095,
4242 "sess %p PRLI received, before plogi ack.\n",
4243 sess);
4244 qlt_send_term_imm_notif(vha, iocb, 1);
4245 res = 0;
4246 break;
4247 }
4248
4249 /*
4250 * This shouldn't happen under normal circumstances,
4251 * since we have deleted the old session during PLOGI
4252 */
4253 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4254 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4255 sess->loop_id, sess, iocb->u.isp24.nport_handle);
4256
4257 sess->local = 0;
4258 sess->loop_id = loop_id;
4259 sess->s_id = port_id;
4260
4261 if (wd3_lo & BIT_7)
4262 sess->conf_compl_supported = 1;
4263
4264 }
4265 res = 1; /* send notify ack */
4266
4267 /* Make session global (not used in fabric mode) */
4268 if (ha->current_topology != ISP_CFG_F) {
4269 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4270 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4271 qla2xxx_wake_dpc(vha);
4272 } else {
4273 /* todo: else - create sess here. */
4274 res = 1; /* send notify ack */
4275 }
4276
4277 break;
4278
4279 case ELS_LOGO:
4280 case ELS_PRLO:
4281 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4282 break;
4283 case ELS_PDISC:
4284 case ELS_ADISC:
4285 {
4286 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4287 if (tgt->link_reinit_iocb_pending) {
4288 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4289 0, 0, 0, 0, 0, 0);
4290 tgt->link_reinit_iocb_pending = 0;
4291 }
4292 res = 1; /* send notify ack */
4293 break;
4294 }
4295
4296 case ELS_FLOGI: /* should never happen */
4297 default:
4298 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4299 "qla_target(%d): Unsupported ELS command %x "
4300 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4301 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4302 break;
4303 }
4304
4305 return res;
4306 }
4307
4308 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4309 {
4310 #if 1
4311 /*
4312 * FIXME: Reject non zero SRR relative offset until we can test
4313 * this code properly.
4314 */
4315 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4316 return -1;
4317 #else
4318 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4319 size_t first_offset = 0, rem_offset = offset, tmp = 0;
4320 int i, sg_srr_cnt, bufflen = 0;
4321
4322 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4323 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4324 "cmd->sg_cnt: %u, direction: %d\n",
4325 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4326
4327 if (!cmd->sg || !cmd->sg_cnt) {
4328 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4329 "Missing cmd->sg or zero cmd->sg_cnt in"
4330 " qla_tgt_set_data_offset\n");
4331 return -EINVAL;
4332 }
4333 /*
4334 * Walk the current cmd->sg list until we locate the new sg_srr_start
4335 */
4336 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4337 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4338 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4339 i, sg, sg_page(sg), sg->length, sg->offset);
4340
4341 if ((sg->length + tmp) > offset) {
4342 first_offset = rem_offset;
4343 sg_srr_start = sg;
4344 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4345 "Found matching sg[%d], using %p as sg_srr_start, "
4346 "and using first_offset: %zu\n", i, sg,
4347 first_offset);
4348 break;
4349 }
4350 tmp += sg->length;
4351 rem_offset -= sg->length;
4352 }
4353
4354 if (!sg_srr_start) {
4355 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4356 "Unable to locate sg_srr_start for offset: %u\n", offset);
4357 return -EINVAL;
4358 }
4359 sg_srr_cnt = (cmd->sg_cnt - i);
4360
4361 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4362 if (!sg_srr) {
4363 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4364 "Unable to allocate sgp\n");
4365 return -ENOMEM;
4366 }
4367 sg_init_table(sg_srr, sg_srr_cnt);
4368 sgp = &sg_srr[0];
4369 /*
4370 * Walk the remaining list for sg_srr_start, mapping to the newly
4371 * allocated sg_srr taking first_offset into account.
4372 */
4373 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4374 if (first_offset) {
4375 sg_set_page(sgp, sg_page(sg),
4376 (sg->length - first_offset), first_offset);
4377 first_offset = 0;
4378 } else {
4379 sg_set_page(sgp, sg_page(sg), sg->length, 0);
4380 }
4381 bufflen += sgp->length;
4382
4383 sgp = sg_next(sgp);
4384 if (!sgp)
4385 break;
4386 }
4387
4388 cmd->sg = sg_srr;
4389 cmd->sg_cnt = sg_srr_cnt;
4390 cmd->bufflen = bufflen;
4391 cmd->offset += offset;
4392 cmd->free_sg = 1;
4393
4394 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4395 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4396 cmd->sg_cnt);
4397 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4398 cmd->bufflen);
4399 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4400 cmd->offset);
4401
4402 if (cmd->sg_cnt < 0)
4403 BUG();
4404
4405 if (cmd->bufflen < 0)
4406 BUG();
4407
4408 return 0;
4409 #endif
4410 }
4411
4412 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4413 uint32_t srr_rel_offs, int *xmit_type)
4414 {
4415 int res = 0, rel_offs;
4416
4417 rel_offs = srr_rel_offs - cmd->offset;
4418 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4419 srr_rel_offs, rel_offs);
4420
4421 *xmit_type = QLA_TGT_XMIT_ALL;
4422
4423 if (rel_offs < 0) {
4424 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4425 "qla_target(%d): SRR rel_offs (%d) < 0",
4426 cmd->vha->vp_idx, rel_offs);
4427 res = -1;
4428 } else if (rel_offs == cmd->bufflen)
4429 *xmit_type = QLA_TGT_XMIT_STATUS;
4430 else if (rel_offs > 0)
4431 res = qlt_set_data_offset(cmd, rel_offs);
4432
4433 return res;
4434 }
4435
4436 /* No locks, thread context */
4437 static void qlt_handle_srr(struct scsi_qla_host *vha,
4438 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4439 {
4440 struct imm_ntfy_from_isp *ntfy =
4441 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4442 struct qla_hw_data *ha = vha->hw;
4443 struct qla_tgt_cmd *cmd = sctio->cmd;
4444 struct se_cmd *se_cmd = &cmd->se_cmd;
4445 unsigned long flags;
4446 int xmit_type = 0, resp = 0;
4447 uint32_t offset;
4448 uint16_t srr_ui;
4449
4450 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4451 srr_ui = ntfy->u.isp24.srr_ui;
4452
4453 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4454 cmd, srr_ui);
4455
4456 switch (srr_ui) {
4457 case SRR_IU_STATUS:
4458 spin_lock_irqsave(&ha->hardware_lock, flags);
4459 qlt_send_notify_ack(vha, ntfy,
4460 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4461 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4462 xmit_type = QLA_TGT_XMIT_STATUS;
4463 resp = 1;
4464 break;
4465 case SRR_IU_DATA_IN:
4466 if (!cmd->sg || !cmd->sg_cnt) {
4467 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4468 "Unable to process SRR_IU_DATA_IN due to"
4469 " missing cmd->sg, state: %d\n", cmd->state);
4470 dump_stack();
4471 goto out_reject;
4472 }
4473 if (se_cmd->scsi_status != 0) {
4474 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4475 "Rejecting SRR_IU_DATA_IN with non GOOD "
4476 "scsi_status\n");
4477 goto out_reject;
4478 }
4479 cmd->bufflen = se_cmd->data_length;
4480
4481 if (qlt_has_data(cmd)) {
4482 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4483 goto out_reject;
4484 spin_lock_irqsave(&ha->hardware_lock, flags);
4485 qlt_send_notify_ack(vha, ntfy,
4486 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4487 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4488 resp = 1;
4489 } else {
4490 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4491 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4492 vha->vp_idx, se_cmd->tag,
4493 cmd->se_cmd.scsi_status);
4494 goto out_reject;
4495 }
4496 break;
4497 case SRR_IU_DATA_OUT:
4498 if (!cmd->sg || !cmd->sg_cnt) {
4499 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4500 "Unable to process SRR_IU_DATA_OUT due to"
4501 " missing cmd->sg\n");
4502 dump_stack();
4503 goto out_reject;
4504 }
4505 if (se_cmd->scsi_status != 0) {
4506 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4507 "Rejecting SRR_IU_DATA_OUT"
4508 " with non GOOD scsi_status\n");
4509 goto out_reject;
4510 }
4511 cmd->bufflen = se_cmd->data_length;
4512
4513 if (qlt_has_data(cmd)) {
4514 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4515 goto out_reject;
4516 spin_lock_irqsave(&ha->hardware_lock, flags);
4517 qlt_send_notify_ack(vha, ntfy,
4518 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4519 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4520 if (xmit_type & QLA_TGT_XMIT_DATA) {
4521 cmd->cmd_flags |= BIT_8;
4522 qlt_rdy_to_xfer(cmd);
4523 }
4524 } else {
4525 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4526 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4527 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4528 goto out_reject;
4529 }
4530 break;
4531 default:
4532 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4533 "qla_target(%d): Unknown srr_ui value %x",
4534 vha->vp_idx, srr_ui);
4535 goto out_reject;
4536 }
4537
4538 /* Transmit response in case of status and data-in cases */
4539 if (resp) {
4540 cmd->cmd_flags |= BIT_7;
4541 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4542 }
4543
4544 return;
4545
4546 out_reject:
4547 spin_lock_irqsave(&ha->hardware_lock, flags);
4548 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4549 NOTIFY_ACK_SRR_FLAGS_REJECT,
4550 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4551 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4552 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4553 cmd->state = QLA_TGT_STATE_DATA_IN;
4554 dump_stack();
4555 } else {
4556 cmd->cmd_flags |= BIT_9;
4557 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
4558 }
4559 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4560 }
4561
4562 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4563 struct qla_tgt_srr_imm *imm, int ha_locked)
4564 {
4565 struct qla_hw_data *ha = vha->hw;
4566 unsigned long flags = 0;
4567
4568 #ifndef __CHECKER__
4569 if (!ha_locked)
4570 spin_lock_irqsave(&ha->hardware_lock, flags);
4571 #endif
4572
4573 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4574 NOTIFY_ACK_SRR_FLAGS_REJECT,
4575 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4576 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4577
4578 #ifndef __CHECKER__
4579 if (!ha_locked)
4580 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4581 #endif
4582
4583 kfree(imm);
4584 }
4585
4586 static void qlt_handle_srr_work(struct work_struct *work)
4587 {
4588 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4589 struct scsi_qla_host *vha = tgt->vha;
4590 struct qla_tgt_srr_ctio *sctio;
4591 unsigned long flags;
4592
4593 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4594 tgt);
4595
4596 restart:
4597 spin_lock_irqsave(&tgt->srr_lock, flags);
4598 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4599 struct qla_tgt_srr_imm *imm, *i, *ti;
4600 struct qla_tgt_cmd *cmd;
4601 struct se_cmd *se_cmd;
4602
4603 imm = NULL;
4604 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4605 srr_list_entry) {
4606 if (i->srr_id == sctio->srr_id) {
4607 list_del(&i->srr_list_entry);
4608 if (imm) {
4609 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4610 "qla_target(%d): There must be "
4611 "only one IMM SRR per CTIO SRR "
4612 "(IMM SRR %p, id %d, CTIO %p\n",
4613 vha->vp_idx, i, i->srr_id, sctio);
4614 qlt_reject_free_srr_imm(tgt->vha, i, 0);
4615 } else
4616 imm = i;
4617 }
4618 }
4619
4620 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4621 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4622 sctio->srr_id);
4623
4624 if (imm == NULL) {
4625 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4626 "Not found matching IMM for SRR CTIO (id %d)\n",
4627 sctio->srr_id);
4628 continue;
4629 } else
4630 list_del(&sctio->srr_list_entry);
4631
4632 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4633
4634 cmd = sctio->cmd;
4635 /*
4636 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4637 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4638 * logic..
4639 */
4640 cmd->offset = 0;
4641 if (cmd->free_sg) {
4642 kfree(cmd->sg);
4643 cmd->sg = NULL;
4644 cmd->free_sg = 0;
4645 }
4646 se_cmd = &cmd->se_cmd;
4647
4648 cmd->sg_cnt = se_cmd->t_data_nents;
4649 cmd->sg = se_cmd->t_data_sg;
4650
4651 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4652 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4653 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4654 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4655
4656 qlt_handle_srr(vha, sctio, imm);
4657
4658 kfree(imm);
4659 kfree(sctio);
4660 goto restart;
4661 }
4662 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4663 }
4664
4665 /* ha->hardware_lock supposed to be held on entry */
4666 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4667 struct imm_ntfy_from_isp *iocb)
4668 {
4669 struct qla_tgt_srr_imm *imm;
4670 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4671 struct qla_tgt_srr_ctio *sctio;
4672
4673 tgt->imm_srr_id++;
4674
4675 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4676 vha->vp_idx);
4677
4678 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4679 if (imm != NULL) {
4680 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4681
4682 /* IRQ is already OFF */
4683 spin_lock(&tgt->srr_lock);
4684 imm->srr_id = tgt->imm_srr_id;
4685 list_add_tail(&imm->srr_list_entry,
4686 &tgt->srr_imm_list);
4687 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4688 "IMM NTFY SRR %p added (id %d, ui %x)\n",
4689 imm, imm->srr_id, iocb->u.isp24.srr_ui);
4690 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4691 int found = 0;
4692 list_for_each_entry(sctio, &tgt->srr_ctio_list,
4693 srr_list_entry) {
4694 if (sctio->srr_id == imm->srr_id) {
4695 found = 1;
4696 break;
4697 }
4698 }
4699 if (found) {
4700 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4701 "Scheduling srr work\n");
4702 schedule_work(&tgt->srr_work);
4703 } else {
4704 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4705 "qla_target(%d): imm_srr_id "
4706 "== ctio_srr_id (%d), but there is no "
4707 "corresponding SRR CTIO, deleting IMM "
4708 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4709 imm);
4710 list_del(&imm->srr_list_entry);
4711
4712 kfree(imm);
4713
4714 spin_unlock(&tgt->srr_lock);
4715 goto out_reject;
4716 }
4717 }
4718 spin_unlock(&tgt->srr_lock);
4719 } else {
4720 struct qla_tgt_srr_ctio *ts;
4721
4722 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4723 "qla_target(%d): Unable to allocate SRR IMM "
4724 "entry, SRR request will be rejected\n", vha->vp_idx);
4725
4726 /* IRQ is already OFF */
4727 spin_lock(&tgt->srr_lock);
4728 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4729 srr_list_entry) {
4730 if (sctio->srr_id == tgt->imm_srr_id) {
4731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4732 "CTIO SRR %p deleted (id %d)\n",
4733 sctio, sctio->srr_id);
4734 list_del(&sctio->srr_list_entry);
4735 qlt_send_term_exchange(vha, sctio->cmd,
4736 &sctio->cmd->atio, 1);
4737 kfree(sctio);
4738 }
4739 }
4740 spin_unlock(&tgt->srr_lock);
4741 goto out_reject;
4742 }
4743
4744 return;
4745
4746 out_reject:
4747 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4748 NOTIFY_ACK_SRR_FLAGS_REJECT,
4749 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4750 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4751 }
4752
4753 /*
4754 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4755 */
4756 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4757 struct imm_ntfy_from_isp *iocb)
4758 {
4759 struct qla_hw_data *ha = vha->hw;
4760 uint32_t add_flags = 0;
4761 int send_notify_ack = 1;
4762 uint16_t status;
4763
4764 status = le16_to_cpu(iocb->u.isp2x.status);
4765 switch (status) {
4766 case IMM_NTFY_LIP_RESET:
4767 {
4768 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4769 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4770 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4771 iocb->u.isp24.status_subcode);
4772
4773 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4774 send_notify_ack = 0;
4775 break;
4776 }
4777
4778 case IMM_NTFY_LIP_LINK_REINIT:
4779 {
4780 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4781 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4782 "qla_target(%d): LINK REINIT (loop %#x, "
4783 "subcode %x)\n", vha->vp_idx,
4784 le16_to_cpu(iocb->u.isp24.nport_handle),
4785 iocb->u.isp24.status_subcode);
4786 if (tgt->link_reinit_iocb_pending) {
4787 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4788 0, 0, 0, 0, 0, 0);
4789 }
4790 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4791 tgt->link_reinit_iocb_pending = 1;
4792 /*
4793 * QLogic requires to wait after LINK REINIT for possible
4794 * PDISC or ADISC ELS commands
4795 */
4796 send_notify_ack = 0;
4797 break;
4798 }
4799
4800 case IMM_NTFY_PORT_LOGOUT:
4801 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4802 "qla_target(%d): Port logout (loop "
4803 "%#x, subcode %x)\n", vha->vp_idx,
4804 le16_to_cpu(iocb->u.isp24.nport_handle),
4805 iocb->u.isp24.status_subcode);
4806
4807 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4808 send_notify_ack = 0;
4809 /* The sessions will be cleared in the callback, if needed */
4810 break;
4811
4812 case IMM_NTFY_GLBL_TPRLO:
4813 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4814 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4815 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4816 send_notify_ack = 0;
4817 /* The sessions will be cleared in the callback, if needed */
4818 break;
4819
4820 case IMM_NTFY_PORT_CONFIG:
4821 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4822 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4823 status);
4824 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4825 send_notify_ack = 0;
4826 /* The sessions will be cleared in the callback, if needed */
4827 break;
4828
4829 case IMM_NTFY_GLBL_LOGO:
4830 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4831 "qla_target(%d): Link failure detected\n",
4832 vha->vp_idx);
4833 /* I_T nexus loss */
4834 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4835 send_notify_ack = 0;
4836 break;
4837
4838 case IMM_NTFY_IOCB_OVERFLOW:
4839 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4840 "qla_target(%d): Cannot provide requested "
4841 "capability (IOCB overflowed the immediate notify "
4842 "resource count)\n", vha->vp_idx);
4843 break;
4844
4845 case IMM_NTFY_ABORT_TASK:
4846 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4847 "qla_target(%d): Abort Task (S %08x I %#x -> "
4848 "L %#x)\n", vha->vp_idx,
4849 le16_to_cpu(iocb->u.isp2x.seq_id),
4850 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4851 le16_to_cpu(iocb->u.isp2x.lun));
4852 if (qlt_abort_task(vha, iocb) == 0)
4853 send_notify_ack = 0;
4854 break;
4855
4856 case IMM_NTFY_RESOURCE:
4857 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4858 "qla_target(%d): Out of resources, host %ld\n",
4859 vha->vp_idx, vha->host_no);
4860 break;
4861
4862 case IMM_NTFY_MSG_RX:
4863 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4864 "qla_target(%d): Immediate notify task %x\n",
4865 vha->vp_idx, iocb->u.isp2x.task_flags);
4866 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4867 send_notify_ack = 0;
4868 break;
4869
4870 case IMM_NTFY_ELS:
4871 if (qlt_24xx_handle_els(vha, iocb) == 0)
4872 send_notify_ack = 0;
4873 break;
4874
4875 case IMM_NTFY_SRR:
4876 qlt_prepare_srr_imm(vha, iocb);
4877 send_notify_ack = 0;
4878 break;
4879
4880 default:
4881 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4882 "qla_target(%d): Received unknown immediate "
4883 "notify status %x\n", vha->vp_idx, status);
4884 break;
4885 }
4886
4887 if (send_notify_ack)
4888 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4889 }
4890
4891 /*
4892 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4893 * This function sends busy to ISP 2xxx or 24xx.
4894 */
4895 static int __qlt_send_busy(struct scsi_qla_host *vha,
4896 struct atio_from_isp *atio, uint16_t status)
4897 {
4898 struct ctio7_to_24xx *ctio24;
4899 struct qla_hw_data *ha = vha->hw;
4900 request_t *pkt;
4901 struct qla_tgt_sess *sess = NULL;
4902
4903 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4904 atio->u.isp24.fcp_hdr.s_id);
4905 if (!sess) {
4906 qlt_send_term_exchange(vha, NULL, atio, 1);
4907 return 0;
4908 }
4909 /* Sending marker isn't necessary, since we called from ISR */
4910
4911 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4912 if (!pkt) {
4913 ql_dbg(ql_dbg_io, vha, 0x3063,
4914 "qla_target(%d): %s failed: unable to allocate "
4915 "request packet", vha->vp_idx, __func__);
4916 return -ENOMEM;
4917 }
4918
4919 pkt->entry_count = 1;
4920 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4921
4922 ctio24 = (struct ctio7_to_24xx *)pkt;
4923 ctio24->entry_type = CTIO_TYPE7;
4924 ctio24->nport_handle = sess->loop_id;
4925 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
4926 ctio24->vp_index = vha->vp_idx;
4927 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4928 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4929 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4930 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4931 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4932 cpu_to_le16(
4933 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4934 CTIO7_FLAGS_DONT_RET_CTIO);
4935 /*
4936 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4937 * if the explicit conformation is used.
4938 */
4939 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4940 ctio24->u.status1.scsi_status = cpu_to_le16(status);
4941 /* Memory Barrier */
4942 wmb();
4943 qla2x00_start_iocbs(vha, vha->req);
4944 return 0;
4945 }
4946
4947 /*
4948 * This routine is used to allocate a command for either a QFull condition
4949 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4950 * out previously.
4951 */
4952 static void
4953 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4954 struct atio_from_isp *atio, uint16_t status, int qfull)
4955 {
4956 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4957 struct qla_hw_data *ha = vha->hw;
4958 struct qla_tgt_sess *sess;
4959 struct se_session *se_sess;
4960 struct qla_tgt_cmd *cmd;
4961 int tag;
4962
4963 if (unlikely(tgt->tgt_stop)) {
4964 ql_dbg(ql_dbg_io, vha, 0x300a,
4965 "New command while device %p is shutting down\n", tgt);
4966 return;
4967 }
4968
4969 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4970 vha->hw->tgt.num_qfull_cmds_dropped++;
4971 if (vha->hw->tgt.num_qfull_cmds_dropped >
4972 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4973 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4974 vha->hw->tgt.num_qfull_cmds_dropped;
4975
4976 ql_dbg(ql_dbg_io, vha, 0x3068,
4977 "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4978 vha->vp_idx, __func__,
4979 vha->hw->tgt.num_qfull_cmds_dropped);
4980
4981 qlt_chk_exch_leak_thresh_hold(vha);
4982 return;
4983 }
4984
4985 sess = ha->tgt.tgt_ops->find_sess_by_s_id
4986 (vha, atio->u.isp24.fcp_hdr.s_id);
4987 if (!sess)
4988 return;
4989
4990 se_sess = sess->se_sess;
4991
4992 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4993 if (tag < 0)
4994 return;
4995
4996 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4997 if (!cmd) {
4998 ql_dbg(ql_dbg_io, vha, 0x3009,
4999 "qla_target(%d): %s: Allocation of cmd failed\n",
5000 vha->vp_idx, __func__);
5001
5002 vha->hw->tgt.num_qfull_cmds_dropped++;
5003 if (vha->hw->tgt.num_qfull_cmds_dropped >
5004 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5005 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5006 vha->hw->tgt.num_qfull_cmds_dropped;
5007
5008 qlt_chk_exch_leak_thresh_hold(vha);
5009 return;
5010 }
5011
5012 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5013
5014 qlt_incr_num_pend_cmds(vha);
5015 INIT_LIST_HEAD(&cmd->cmd_list);
5016 memcpy(&cmd->atio, atio, sizeof(*atio));
5017
5018 cmd->tgt = vha->vha_tgt.qla_tgt;
5019 cmd->vha = vha;
5020 cmd->reset_count = vha->hw->chip_reset;
5021 cmd->q_full = 1;
5022
5023 if (qfull) {
5024 cmd->q_full = 1;
5025 /* NOTE: borrowing the state field to carry the status */
5026 cmd->state = status;
5027 } else
5028 cmd->term_exchg = 1;
5029
5030 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5031
5032 vha->hw->tgt.num_qfull_cmds_alloc++;
5033 if (vha->hw->tgt.num_qfull_cmds_alloc >
5034 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5035 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5036 vha->hw->tgt.num_qfull_cmds_alloc;
5037 }
5038
5039 int
5040 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5041 {
5042 struct qla_hw_data *ha = vha->hw;
5043 unsigned long flags;
5044 struct qla_tgt_cmd *cmd, *tcmd;
5045 struct list_head free_list;
5046 int rc = 0;
5047
5048 if (list_empty(&ha->tgt.q_full_list))
5049 return 0;
5050
5051 INIT_LIST_HEAD(&free_list);
5052
5053 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5054
5055 if (list_empty(&ha->tgt.q_full_list)) {
5056 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5057 return 0;
5058 }
5059
5060 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5061 if (cmd->q_full)
5062 /* cmd->state is a borrowed field to hold status */
5063 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5064 else if (cmd->term_exchg)
5065 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5066
5067 if (rc == -ENOMEM)
5068 break;
5069
5070 if (cmd->q_full)
5071 ql_dbg(ql_dbg_io, vha, 0x3006,
5072 "%s: busy sent for ox_id[%04x]\n", __func__,
5073 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5074 else if (cmd->term_exchg)
5075 ql_dbg(ql_dbg_io, vha, 0x3007,
5076 "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5077 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5078 else
5079 ql_dbg(ql_dbg_io, vha, 0x3008,
5080 "%s: Unexpected cmd in QFull list %p\n", __func__,
5081 cmd);
5082
5083 list_del(&cmd->cmd_list);
5084 list_add_tail(&cmd->cmd_list, &free_list);
5085
5086 /* piggy back on hardware_lock for protection */
5087 vha->hw->tgt.num_qfull_cmds_alloc--;
5088 }
5089 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5090
5091 cmd = NULL;
5092
5093 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5094 list_del(&cmd->cmd_list);
5095 /* This cmd was never sent to TCM. There is no need
5096 * to schedule free or call free_cmd
5097 */
5098 qlt_free_cmd(cmd);
5099 }
5100 return rc;
5101 }
5102
5103 static void
5104 qlt_send_busy(struct scsi_qla_host *vha,
5105 struct atio_from_isp *atio, uint16_t status)
5106 {
5107 int rc = 0;
5108
5109 rc = __qlt_send_busy(vha, atio, status);
5110 if (rc == -ENOMEM)
5111 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5112 }
5113
5114 static int
5115 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5116 struct atio_from_isp *atio)
5117 {
5118 struct qla_hw_data *ha = vha->hw;
5119 uint16_t status;
5120
5121 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5122 return 0;
5123
5124 status = temp_sam_status;
5125 qlt_send_busy(vha, atio, status);
5126 return 1;
5127 }
5128
5129 /* ha->hardware_lock supposed to be held on entry */
5130 /* called via callback from qla2xxx */
5131 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5132 struct atio_from_isp *atio)
5133 {
5134 struct qla_hw_data *ha = vha->hw;
5135 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5136 int rc;
5137
5138 if (unlikely(tgt == NULL)) {
5139 ql_dbg(ql_dbg_io, vha, 0x3064,
5140 "ATIO pkt, but no tgt (ha %p)", ha);
5141 return;
5142 }
5143 /*
5144 * In tgt_stop mode we also should allow all requests to pass.
5145 * Otherwise, some commands can stuck.
5146 */
5147
5148 tgt->irq_cmd_count++;
5149
5150 switch (atio->u.raw.entry_type) {
5151 case ATIO_TYPE7:
5152 if (unlikely(atio->u.isp24.exchange_addr ==
5153 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5154 ql_dbg(ql_dbg_io, vha, 0x3065,
5155 "qla_target(%d): ATIO_TYPE7 "
5156 "received with UNKNOWN exchange address, "
5157 "sending QUEUE_FULL\n", vha->vp_idx);
5158 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5159 break;
5160 }
5161
5162
5163
5164 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5165 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5166 if (rc != 0) {
5167 tgt->irq_cmd_count--;
5168 return;
5169 }
5170 rc = qlt_handle_cmd_for_atio(vha, atio);
5171 } else {
5172 rc = qlt_handle_task_mgmt(vha, atio);
5173 }
5174 if (unlikely(rc != 0)) {
5175 if (rc == -ESRCH) {
5176 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5177 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5178 #else
5179 qlt_send_term_exchange(vha, NULL, atio, 1);
5180 #endif
5181 } else {
5182 if (tgt->tgt_stop) {
5183 ql_dbg(ql_dbg_tgt, vha, 0xe059,
5184 "qla_target: Unable to send "
5185 "command to target for req, "
5186 "ignoring.\n");
5187 } else {
5188 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5189 "qla_target(%d): Unable to send "
5190 "command to target, sending BUSY "
5191 "status.\n", vha->vp_idx);
5192 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5193 }
5194 }
5195 }
5196 break;
5197
5198 case IMMED_NOTIFY_TYPE:
5199 {
5200 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5201 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5202 "qla_target(%d): Received ATIO packet %x "
5203 "with error status %x\n", vha->vp_idx,
5204 atio->u.raw.entry_type,
5205 atio->u.isp2x.entry_status);
5206 break;
5207 }
5208 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5209 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5210 break;
5211 }
5212
5213 default:
5214 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5215 "qla_target(%d): Received unknown ATIO atio "
5216 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5217 break;
5218 }
5219
5220 tgt->irq_cmd_count--;
5221 }
5222
5223 /* ha->hardware_lock supposed to be held on entry */
5224 /* called via callback from qla2xxx */
5225 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5226 {
5227 struct qla_hw_data *ha = vha->hw;
5228 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5229
5230 if (unlikely(tgt == NULL)) {
5231 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5232 "qla_target(%d): Response pkt %x received, but no "
5233 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5234 return;
5235 }
5236
5237 /*
5238 * In tgt_stop mode we also should allow all requests to pass.
5239 * Otherwise, some commands can stuck.
5240 */
5241
5242 tgt->irq_cmd_count++;
5243
5244 switch (pkt->entry_type) {
5245 case CTIO_CRC2:
5246 case CTIO_TYPE7:
5247 {
5248 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5249 qlt_do_ctio_completion(vha, entry->handle,
5250 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5251 entry);
5252 break;
5253 }
5254
5255 case ACCEPT_TGT_IO_TYPE:
5256 {
5257 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5258 int rc;
5259 if (atio->u.isp2x.status !=
5260 cpu_to_le16(ATIO_CDB_VALID)) {
5261 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5262 "qla_target(%d): ATIO with error "
5263 "status %x received\n", vha->vp_idx,
5264 le16_to_cpu(atio->u.isp2x.status));
5265 break;
5266 }
5267
5268 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5269 if (rc != 0) {
5270 tgt->irq_cmd_count--;
5271 return;
5272 }
5273
5274 rc = qlt_handle_cmd_for_atio(vha, atio);
5275 if (unlikely(rc != 0)) {
5276 if (rc == -ESRCH) {
5277 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5278 qlt_send_busy(vha, atio, 0);
5279 #else
5280 qlt_send_term_exchange(vha, NULL, atio, 1);
5281 #endif
5282 } else {
5283 if (tgt->tgt_stop) {
5284 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5285 "qla_target: Unable to send "
5286 "command to target, sending TERM "
5287 "EXCHANGE for rsp\n");
5288 qlt_send_term_exchange(vha, NULL,
5289 atio, 1);
5290 } else {
5291 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5292 "qla_target(%d): Unable to send "
5293 "command to target, sending BUSY "
5294 "status\n", vha->vp_idx);
5295 qlt_send_busy(vha, atio, 0);
5296 }
5297 }
5298 }
5299 }
5300 break;
5301
5302 case CONTINUE_TGT_IO_TYPE:
5303 {
5304 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5305 qlt_do_ctio_completion(vha, entry->handle,
5306 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5307 entry);
5308 break;
5309 }
5310
5311 case CTIO_A64_TYPE:
5312 {
5313 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5314 qlt_do_ctio_completion(vha, entry->handle,
5315 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5316 entry);
5317 break;
5318 }
5319
5320 case IMMED_NOTIFY_TYPE:
5321 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5322 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5323 break;
5324
5325 case NOTIFY_ACK_TYPE:
5326 if (tgt->notify_ack_expected > 0) {
5327 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5328 ql_dbg(ql_dbg_tgt, vha, 0xe036,
5329 "NOTIFY_ACK seq %08x status %x\n",
5330 le16_to_cpu(entry->u.isp2x.seq_id),
5331 le16_to_cpu(entry->u.isp2x.status));
5332 tgt->notify_ack_expected--;
5333 if (entry->u.isp2x.status !=
5334 cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5335 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5336 "qla_target(%d): NOTIFY_ACK "
5337 "failed %x\n", vha->vp_idx,
5338 le16_to_cpu(entry->u.isp2x.status));
5339 }
5340 } else {
5341 ql_dbg(ql_dbg_tgt, vha, 0xe062,
5342 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5343 vha->vp_idx);
5344 }
5345 break;
5346
5347 case ABTS_RECV_24XX:
5348 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5349 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5350 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5351 break;
5352
5353 case ABTS_RESP_24XX:
5354 if (tgt->abts_resp_expected > 0) {
5355 struct abts_resp_from_24xx_fw *entry =
5356 (struct abts_resp_from_24xx_fw *)pkt;
5357 ql_dbg(ql_dbg_tgt, vha, 0xe038,
5358 "ABTS_RESP_24XX: compl_status %x\n",
5359 entry->compl_status);
5360 tgt->abts_resp_expected--;
5361 if (le16_to_cpu(entry->compl_status) !=
5362 ABTS_RESP_COMPL_SUCCESS) {
5363 if ((entry->error_subcode1 == 0x1E) &&
5364 (entry->error_subcode2 == 0)) {
5365 /*
5366 * We've got a race here: aborted
5367 * exchange not terminated, i.e.
5368 * response for the aborted command was
5369 * sent between the abort request was
5370 * received and processed.
5371 * Unfortunately, the firmware has a
5372 * silly requirement that all aborted
5373 * exchanges must be explicitely
5374 * terminated, otherwise it refuses to
5375 * send responses for the abort
5376 * requests. So, we have to
5377 * (re)terminate the exchange and retry
5378 * the abort response.
5379 */
5380 qlt_24xx_retry_term_exchange(vha,
5381 entry);
5382 } else
5383 ql_dbg(ql_dbg_tgt, vha, 0xe063,
5384 "qla_target(%d): ABTS_RESP_24XX "
5385 "failed %x (subcode %x:%x)",
5386 vha->vp_idx, entry->compl_status,
5387 entry->error_subcode1,
5388 entry->error_subcode2);
5389 }
5390 } else {
5391 ql_dbg(ql_dbg_tgt, vha, 0xe064,
5392 "qla_target(%d): Unexpected ABTS_RESP_24XX "
5393 "received\n", vha->vp_idx);
5394 }
5395 break;
5396
5397 default:
5398 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5399 "qla_target(%d): Received unknown response pkt "
5400 "type %x\n", vha->vp_idx, pkt->entry_type);
5401 break;
5402 }
5403
5404 tgt->irq_cmd_count--;
5405 }
5406
5407 /*
5408 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5409 */
5410 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5411 uint16_t *mailbox)
5412 {
5413 struct qla_hw_data *ha = vha->hw;
5414 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5415 int login_code;
5416
5417 if (!ha->tgt.tgt_ops)
5418 return;
5419
5420 if (unlikely(tgt == NULL)) {
5421 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5422 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5423 return;
5424 }
5425
5426 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5427 IS_QLA2100(ha))
5428 return;
5429 /*
5430 * In tgt_stop mode we also should allow all requests to pass.
5431 * Otherwise, some commands can stuck.
5432 */
5433
5434 tgt->irq_cmd_count++;
5435
5436 switch (code) {
5437 case MBA_RESET: /* Reset */
5438 case MBA_SYSTEM_ERR: /* System Error */
5439 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
5440 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
5441 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5442 "qla_target(%d): System error async event %#x "
5443 "occurred", vha->vp_idx, code);
5444 break;
5445 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
5446 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5447 break;
5448
5449 case MBA_LOOP_UP:
5450 {
5451 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5452 "qla_target(%d): Async LOOP_UP occurred "
5453 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5454 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5455 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5456 if (tgt->link_reinit_iocb_pending) {
5457 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5458 0, 0, 0, 0, 0, 0);
5459 tgt->link_reinit_iocb_pending = 0;
5460 }
5461 break;
5462 }
5463
5464 case MBA_LIP_OCCURRED:
5465 case MBA_LOOP_DOWN:
5466 case MBA_LIP_RESET:
5467 case MBA_RSCN_UPDATE:
5468 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5469 "qla_target(%d): Async event %#x occurred "
5470 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5471 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5472 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5473 break;
5474
5475 case MBA_PORT_UPDATE:
5476 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5477 "qla_target(%d): Port update async event %#x "
5478 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5479 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5480 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5481 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5482
5483 login_code = le16_to_cpu(mailbox[2]);
5484 if (login_code == 0x4)
5485 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5486 "Async MB 2: Got PLOGI Complete\n");
5487 else if (login_code == 0x7)
5488 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5489 "Async MB 2: Port Logged Out\n");
5490 break;
5491
5492 default:
5493 break;
5494 }
5495
5496 tgt->irq_cmd_count--;
5497 }
5498
5499 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5500 uint16_t loop_id)
5501 {
5502 fc_port_t *fcport;
5503 int rc;
5504
5505 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5506 if (!fcport) {
5507 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5508 "qla_target(%d): Allocation of tmp FC port failed",
5509 vha->vp_idx);
5510 return NULL;
5511 }
5512
5513 fcport->loop_id = loop_id;
5514
5515 rc = qla2x00_get_port_database(vha, fcport, 0);
5516 if (rc != QLA_SUCCESS) {
5517 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5518 "qla_target(%d): Failed to retrieve fcport "
5519 "information -- get_port_database() returned %x "
5520 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5521 kfree(fcport);
5522 return NULL;
5523 }
5524
5525 return fcport;
5526 }
5527
5528 /* Must be called under tgt_mutex */
5529 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5530 uint8_t *s_id)
5531 {
5532 struct qla_tgt_sess *sess = NULL;
5533 fc_port_t *fcport = NULL;
5534 int rc, global_resets;
5535 uint16_t loop_id = 0;
5536
5537 retry:
5538 global_resets =
5539 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5540
5541 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5542 if (rc != 0) {
5543 if ((s_id[0] == 0xFF) &&
5544 (s_id[1] == 0xFC)) {
5545 /*
5546 * This is Domain Controller, so it should be
5547 * OK to drop SCSI commands from it.
5548 */
5549 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5550 "Unable to find initiator with S_ID %x:%x:%x",
5551 s_id[0], s_id[1], s_id[2]);
5552 } else
5553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
5554 "qla_target(%d): Unable to find "
5555 "initiator with S_ID %x:%x:%x",
5556 vha->vp_idx, s_id[0], s_id[1],
5557 s_id[2]);
5558 return NULL;
5559 }
5560
5561 fcport = qlt_get_port_database(vha, loop_id);
5562 if (!fcport)
5563 return NULL;
5564
5565 if (global_resets !=
5566 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5567 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5568 "qla_target(%d): global reset during session discovery "
5569 "(counter was %d, new %d), retrying", vha->vp_idx,
5570 global_resets,
5571 atomic_read(&vha->vha_tgt.
5572 qla_tgt->tgt_global_resets_count));
5573 goto retry;
5574 }
5575
5576 sess = qlt_create_sess(vha, fcport, true);
5577
5578 kfree(fcport);
5579 return sess;
5580 }
5581
5582 static void qlt_abort_work(struct qla_tgt *tgt,
5583 struct qla_tgt_sess_work_param *prm)
5584 {
5585 struct scsi_qla_host *vha = tgt->vha;
5586 struct qla_hw_data *ha = vha->hw;
5587 struct qla_tgt_sess *sess = NULL;
5588 unsigned long flags;
5589 uint32_t be_s_id;
5590 uint8_t s_id[3];
5591 int rc;
5592
5593 spin_lock_irqsave(&ha->hardware_lock, flags);
5594
5595 if (tgt->tgt_stop)
5596 goto out_term;
5597
5598 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5599 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5600 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5601
5602 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5603 (unsigned char *)&be_s_id);
5604 if (!sess) {
5605 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5606
5607 mutex_lock(&vha->vha_tgt.tgt_mutex);
5608 sess = qlt_make_local_sess(vha, s_id);
5609 /* sess has got an extra creation ref */
5610 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5611
5612 spin_lock_irqsave(&ha->hardware_lock, flags);
5613 if (!sess)
5614 goto out_term;
5615 } else {
5616 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5617 sess = NULL;
5618 goto out_term;
5619 }
5620
5621 kref_get(&sess->se_sess->sess_kref);
5622 }
5623
5624 if (tgt->tgt_stop)
5625 goto out_term;
5626
5627 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5628 if (rc != 0)
5629 goto out_term;
5630
5631 ha->tgt.tgt_ops->put_sess(sess);
5632 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5633 return;
5634
5635 out_term:
5636 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5637 if (sess)
5638 ha->tgt.tgt_ops->put_sess(sess);
5639 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5640 }
5641
5642 static void qlt_tmr_work(struct qla_tgt *tgt,
5643 struct qla_tgt_sess_work_param *prm)
5644 {
5645 struct atio_from_isp *a = &prm->tm_iocb2;
5646 struct scsi_qla_host *vha = tgt->vha;
5647 struct qla_hw_data *ha = vha->hw;
5648 struct qla_tgt_sess *sess = NULL;
5649 unsigned long flags;
5650 uint8_t *s_id = NULL; /* to hide compiler warnings */
5651 int rc;
5652 uint32_t lun, unpacked_lun;
5653 int fn;
5654 void *iocb;
5655
5656 spin_lock_irqsave(&ha->hardware_lock, flags);
5657
5658 if (tgt->tgt_stop)
5659 goto out_term;
5660
5661 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5662 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5663 if (!sess) {
5664 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5665
5666 mutex_lock(&vha->vha_tgt.tgt_mutex);
5667 sess = qlt_make_local_sess(vha, s_id);
5668 /* sess has got an extra creation ref */
5669 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5670
5671 spin_lock_irqsave(&ha->hardware_lock, flags);
5672 if (!sess)
5673 goto out_term;
5674 } else {
5675 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5676 sess = NULL;
5677 goto out_term;
5678 }
5679
5680 kref_get(&sess->se_sess->sess_kref);
5681 }
5682
5683 iocb = a;
5684 lun = a->u.isp24.fcp_cmnd.lun;
5685 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5686 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5687
5688 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5689 if (rc != 0)
5690 goto out_term;
5691
5692 ha->tgt.tgt_ops->put_sess(sess);
5693 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5694 return;
5695
5696 out_term:
5697 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5698 if (sess)
5699 ha->tgt.tgt_ops->put_sess(sess);
5700 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5701 }
5702
5703 static void qlt_sess_work_fn(struct work_struct *work)
5704 {
5705 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5706 struct scsi_qla_host *vha = tgt->vha;
5707 unsigned long flags;
5708
5709 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5710
5711 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5712 while (!list_empty(&tgt->sess_works_list)) {
5713 struct qla_tgt_sess_work_param *prm = list_entry(
5714 tgt->sess_works_list.next, typeof(*prm),
5715 sess_works_list_entry);
5716
5717 /*
5718 * This work can be scheduled on several CPUs at time, so we
5719 * must delete the entry to eliminate double processing
5720 */
5721 list_del(&prm->sess_works_list_entry);
5722
5723 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5724
5725 switch (prm->type) {
5726 case QLA_TGT_SESS_WORK_ABORT:
5727 qlt_abort_work(tgt, prm);
5728 break;
5729 case QLA_TGT_SESS_WORK_TM:
5730 qlt_tmr_work(tgt, prm);
5731 break;
5732 default:
5733 BUG_ON(1);
5734 break;
5735 }
5736
5737 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5738
5739 kfree(prm);
5740 }
5741 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5742 }
5743
5744 /* Must be called under tgt_host_action_mutex */
5745 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5746 {
5747 struct qla_tgt *tgt;
5748
5749 if (!QLA_TGT_MODE_ENABLED())
5750 return 0;
5751
5752 if (!IS_TGT_MODE_CAPABLE(ha)) {
5753 ql_log(ql_log_warn, base_vha, 0xe070,
5754 "This adapter does not support target mode.\n");
5755 return 0;
5756 }
5757
5758 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5759 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5760
5761 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5762
5763 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5764 if (!tgt) {
5765 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5766 "Unable to allocate struct qla_tgt\n");
5767 return -ENOMEM;
5768 }
5769
5770 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5771 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5772
5773 tgt->ha = ha;
5774 tgt->vha = base_vha;
5775 init_waitqueue_head(&tgt->waitQ);
5776 INIT_LIST_HEAD(&tgt->sess_list);
5777 INIT_LIST_HEAD(&tgt->del_sess_list);
5778 INIT_DELAYED_WORK(&tgt->sess_del_work,
5779 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5780 spin_lock_init(&tgt->sess_work_lock);
5781 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5782 INIT_LIST_HEAD(&tgt->sess_works_list);
5783 spin_lock_init(&tgt->srr_lock);
5784 INIT_LIST_HEAD(&tgt->srr_ctio_list);
5785 INIT_LIST_HEAD(&tgt->srr_imm_list);
5786 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5787 atomic_set(&tgt->tgt_global_resets_count, 0);
5788
5789 base_vha->vha_tgt.qla_tgt = tgt;
5790
5791 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5792 "qla_target(%d): using 64 Bit PCI addressing",
5793 base_vha->vp_idx);
5794 tgt->tgt_enable_64bit_addr = 1;
5795 /* 3 is reserved */
5796 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5797 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5798 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5799
5800 if (base_vha->fc_vport)
5801 return 0;
5802
5803 mutex_lock(&qla_tgt_mutex);
5804 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5805 mutex_unlock(&qla_tgt_mutex);
5806
5807 return 0;
5808 }
5809
5810 /* Must be called under tgt_host_action_mutex */
5811 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5812 {
5813 if (!vha->vha_tgt.qla_tgt)
5814 return 0;
5815
5816 if (vha->fc_vport) {
5817 qlt_release(vha->vha_tgt.qla_tgt);
5818 return 0;
5819 }
5820
5821 /* free left over qfull cmds */
5822 qlt_init_term_exchange(vha);
5823
5824 mutex_lock(&qla_tgt_mutex);
5825 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5826 mutex_unlock(&qla_tgt_mutex);
5827
5828 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5829 vha->host_no, ha);
5830 qlt_release(vha->vha_tgt.qla_tgt);
5831
5832 return 0;
5833 }
5834
5835 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5836 unsigned char *b)
5837 {
5838 int i;
5839
5840 pr_debug("qla2xxx HW vha->node_name: ");
5841 for (i = 0; i < WWN_SIZE; i++)
5842 pr_debug("%02x ", vha->node_name[i]);
5843 pr_debug("\n");
5844 pr_debug("qla2xxx HW vha->port_name: ");
5845 for (i = 0; i < WWN_SIZE; i++)
5846 pr_debug("%02x ", vha->port_name[i]);
5847 pr_debug("\n");
5848
5849 pr_debug("qla2xxx passed configfs WWPN: ");
5850 put_unaligned_be64(wwpn, b);
5851 for (i = 0; i < WWN_SIZE; i++)
5852 pr_debug("%02x ", b[i]);
5853 pr_debug("\n");
5854 }
5855
5856 /**
5857 * qla_tgt_lport_register - register lport with external module
5858 *
5859 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5860 * @wwpn: Passwd FC target WWPN
5861 * @callback: lport initialization callback for tcm_qla2xxx code
5862 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5863 */
5864 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5865 u64 npiv_wwpn, u64 npiv_wwnn,
5866 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5867 {
5868 struct qla_tgt *tgt;
5869 struct scsi_qla_host *vha;
5870 struct qla_hw_data *ha;
5871 struct Scsi_Host *host;
5872 unsigned long flags;
5873 int rc;
5874 u8 b[WWN_SIZE];
5875
5876 mutex_lock(&qla_tgt_mutex);
5877 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5878 vha = tgt->vha;
5879 ha = vha->hw;
5880
5881 host = vha->host;
5882 if (!host)
5883 continue;
5884
5885 if (!(host->hostt->supported_mode & MODE_TARGET))
5886 continue;
5887
5888 spin_lock_irqsave(&ha->hardware_lock, flags);
5889 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5890 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5891 host->host_no);
5892 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5893 continue;
5894 }
5895 if (tgt->tgt_stop) {
5896 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5897 host->host_no);
5898 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5899 continue;
5900 }
5901 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5902
5903 if (!scsi_host_get(host)) {
5904 ql_dbg(ql_dbg_tgt, vha, 0xe068,
5905 "Unable to scsi_host_get() for"
5906 " qla2xxx scsi_host\n");
5907 continue;
5908 }
5909 qlt_lport_dump(vha, phys_wwpn, b);
5910
5911 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5912 scsi_host_put(host);
5913 continue;
5914 }
5915 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5916 if (rc != 0)
5917 scsi_host_put(host);
5918
5919 mutex_unlock(&qla_tgt_mutex);
5920 return rc;
5921 }
5922 mutex_unlock(&qla_tgt_mutex);
5923
5924 return -ENODEV;
5925 }
5926 EXPORT_SYMBOL(qlt_lport_register);
5927
5928 /**
5929 * qla_tgt_lport_deregister - Degister lport
5930 *
5931 * @vha: Registered scsi_qla_host pointer
5932 */
5933 void qlt_lport_deregister(struct scsi_qla_host *vha)
5934 {
5935 struct qla_hw_data *ha = vha->hw;
5936 struct Scsi_Host *sh = vha->host;
5937 /*
5938 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5939 */
5940 vha->vha_tgt.target_lport_ptr = NULL;
5941 ha->tgt.tgt_ops = NULL;
5942 /*
5943 * Release the Scsi_Host reference for the underlying qla2xxx host
5944 */
5945 scsi_host_put(sh);
5946 }
5947 EXPORT_SYMBOL(qlt_lport_deregister);
5948
5949 /* Must be called under HW lock */
5950 static void qlt_set_mode(struct scsi_qla_host *vha)
5951 {
5952 struct qla_hw_data *ha = vha->hw;
5953
5954 switch (ql2x_ini_mode) {
5955 case QLA2XXX_INI_MODE_DISABLED:
5956 case QLA2XXX_INI_MODE_EXCLUSIVE:
5957 vha->host->active_mode = MODE_TARGET;
5958 break;
5959 case QLA2XXX_INI_MODE_ENABLED:
5960 vha->host->active_mode |= MODE_TARGET;
5961 break;
5962 default:
5963 break;
5964 }
5965
5966 if (ha->tgt.ini_mode_force_reverse)
5967 qla_reverse_ini_mode(vha);
5968 }
5969
5970 /* Must be called under HW lock */
5971 static void qlt_clear_mode(struct scsi_qla_host *vha)
5972 {
5973 struct qla_hw_data *ha = vha->hw;
5974
5975 switch (ql2x_ini_mode) {
5976 case QLA2XXX_INI_MODE_DISABLED:
5977 vha->host->active_mode = MODE_UNKNOWN;
5978 break;
5979 case QLA2XXX_INI_MODE_EXCLUSIVE:
5980 vha->host->active_mode = MODE_INITIATOR;
5981 break;
5982 case QLA2XXX_INI_MODE_ENABLED:
5983 vha->host->active_mode &= ~MODE_TARGET;
5984 break;
5985 default:
5986 break;
5987 }
5988
5989 if (ha->tgt.ini_mode_force_reverse)
5990 qla_reverse_ini_mode(vha);
5991 }
5992
5993 /*
5994 * qla_tgt_enable_vha - NO LOCK HELD
5995 *
5996 * host_reset, bring up w/ Target Mode Enabled
5997 */
5998 void
5999 qlt_enable_vha(struct scsi_qla_host *vha)
6000 {
6001 struct qla_hw_data *ha = vha->hw;
6002 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6003 unsigned long flags;
6004 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6005
6006 if (!tgt) {
6007 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6008 "Unable to locate qla_tgt pointer from"
6009 " struct qla_hw_data\n");
6010 dump_stack();
6011 return;
6012 }
6013
6014 spin_lock_irqsave(&ha->hardware_lock, flags);
6015 tgt->tgt_stopped = 0;
6016 qlt_set_mode(vha);
6017 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6018
6019 if (vha->vp_idx) {
6020 qla24xx_disable_vp(vha);
6021 qla24xx_enable_vp(vha);
6022 } else {
6023 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6024 qla2xxx_wake_dpc(base_vha);
6025 qla2x00_wait_for_hba_online(base_vha);
6026 }
6027 }
6028 EXPORT_SYMBOL(qlt_enable_vha);
6029
6030 /*
6031 * qla_tgt_disable_vha - NO LOCK HELD
6032 *
6033 * Disable Target Mode and reset the adapter
6034 */
6035 static void qlt_disable_vha(struct scsi_qla_host *vha)
6036 {
6037 struct qla_hw_data *ha = vha->hw;
6038 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6039 unsigned long flags;
6040
6041 if (!tgt) {
6042 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6043 "Unable to locate qla_tgt pointer from"
6044 " struct qla_hw_data\n");
6045 dump_stack();
6046 return;
6047 }
6048
6049 spin_lock_irqsave(&ha->hardware_lock, flags);
6050 qlt_clear_mode(vha);
6051 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6052
6053 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6054 qla2xxx_wake_dpc(vha);
6055 qla2x00_wait_for_hba_online(vha);
6056 }
6057
6058 /*
6059 * Called from qla_init.c:qla24xx_vport_create() contex to setup
6060 * the target mode specific struct scsi_qla_host and struct qla_hw_data
6061 * members.
6062 */
6063 void
6064 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6065 {
6066 if (!qla_tgt_mode_enabled(vha))
6067 return;
6068
6069 vha->vha_tgt.qla_tgt = NULL;
6070
6071 mutex_init(&vha->vha_tgt.tgt_mutex);
6072 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6073
6074 qlt_clear_mode(vha);
6075
6076 /*
6077 * NOTE: Currently the value is kept the same for <24xx and
6078 * >=24xx ISPs. If it is necessary to change it,
6079 * the check should be added for specific ISPs,
6080 * assigning the value appropriately.
6081 */
6082 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6083
6084 qlt_add_target(ha, vha);
6085 }
6086
6087 void
6088 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6089 {
6090 /*
6091 * FC-4 Feature bit 0 indicates target functionality to the name server.
6092 */
6093 if (qla_tgt_mode_enabled(vha)) {
6094 if (qla_ini_mode_enabled(vha))
6095 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6096 else
6097 ct_req->req.rff_id.fc4_feature = BIT_0;
6098 } else if (qla_ini_mode_enabled(vha)) {
6099 ct_req->req.rff_id.fc4_feature = BIT_1;
6100 }
6101 }
6102
6103 /*
6104 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6105 * @ha: HA context
6106 *
6107 * Beginning of ATIO ring has initialization control block already built
6108 * by nvram config routine.
6109 *
6110 * Returns 0 on success.
6111 */
6112 void
6113 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6114 {
6115 struct qla_hw_data *ha = vha->hw;
6116 uint16_t cnt;
6117 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6118
6119 if (!qla_tgt_mode_enabled(vha))
6120 return;
6121
6122 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6123 pkt->u.raw.signature = ATIO_PROCESSED;
6124 pkt++;
6125 }
6126
6127 }
6128
6129 /*
6130 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6131 * @ha: SCSI driver HA context
6132 */
6133 void
6134 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
6135 {
6136 struct qla_hw_data *ha = vha->hw;
6137 struct atio_from_isp *pkt;
6138 int cnt, i;
6139
6140 if (!vha->flags.online)
6141 return;
6142
6143 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6144 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6145 cnt = pkt->u.raw.entry_count;
6146
6147 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
6148
6149 for (i = 0; i < cnt; i++) {
6150 ha->tgt.atio_ring_index++;
6151 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6152 ha->tgt.atio_ring_index = 0;
6153 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6154 } else
6155 ha->tgt.atio_ring_ptr++;
6156
6157 pkt->u.raw.signature = ATIO_PROCESSED;
6158 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6159 }
6160 wmb();
6161 }
6162
6163 /* Adjust ring index */
6164 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6165 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6166 }
6167
6168 void
6169 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6170 {
6171 struct qla_hw_data *ha = vha->hw;
6172 if (!QLA_TGT_MODE_ENABLED())
6173 return;
6174
6175 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6176 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6177 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6178
6179 if (IS_ATIO_MSIX_CAPABLE(ha)) {
6180 struct qla_msix_entry *msix = &ha->msix_entries[2];
6181 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6182
6183 icb->msix_atio = cpu_to_le16(msix->entry);
6184 ql_dbg(ql_dbg_init, vha, 0xf072,
6185 "Registering ICB vector 0x%x for atio que.\n",
6186 msix->entry);
6187 }
6188 }
6189
6190 void
6191 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6192 {
6193 struct qla_hw_data *ha = vha->hw;
6194
6195 if (qla_tgt_mode_enabled(vha)) {
6196 if (!ha->tgt.saved_set) {
6197 /* We save only once */
6198 ha->tgt.saved_exchange_count = nv->exchange_count;
6199 ha->tgt.saved_firmware_options_1 =
6200 nv->firmware_options_1;
6201 ha->tgt.saved_firmware_options_2 =
6202 nv->firmware_options_2;
6203 ha->tgt.saved_firmware_options_3 =
6204 nv->firmware_options_3;
6205 ha->tgt.saved_set = 1;
6206 }
6207
6208 nv->exchange_count = cpu_to_le16(0xFFFF);
6209
6210 /* Enable target mode */
6211 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6212
6213 /* Disable ini mode, if requested */
6214 if (!qla_ini_mode_enabled(vha))
6215 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6216
6217 /* Disable Full Login after LIP */
6218 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6219 /* Enable initial LIP */
6220 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6221 if (ql2xtgt_tape_enable)
6222 /* Enable FC Tape support */
6223 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6224 else
6225 /* Disable FC Tape support */
6226 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6227
6228 /* Disable Full Login after LIP */
6229 nv->host_p &= cpu_to_le32(~BIT_10);
6230 /* Enable target PRLI control */
6231 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6232 } else {
6233 if (ha->tgt.saved_set) {
6234 nv->exchange_count = ha->tgt.saved_exchange_count;
6235 nv->firmware_options_1 =
6236 ha->tgt.saved_firmware_options_1;
6237 nv->firmware_options_2 =
6238 ha->tgt.saved_firmware_options_2;
6239 nv->firmware_options_3 =
6240 ha->tgt.saved_firmware_options_3;
6241 }
6242 return;
6243 }
6244
6245 /* out-of-order frames reassembly */
6246 nv->firmware_options_3 |= BIT_6|BIT_9;
6247
6248 if (ha->tgt.enable_class_2) {
6249 if (vha->flags.init_done)
6250 fc_host_supported_classes(vha->host) =
6251 FC_COS_CLASS2 | FC_COS_CLASS3;
6252
6253 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6254 } else {
6255 if (vha->flags.init_done)
6256 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6257
6258 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6259 }
6260 }
6261
6262 void
6263 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6264 struct init_cb_24xx *icb)
6265 {
6266 struct qla_hw_data *ha = vha->hw;
6267
6268 if (ha->tgt.node_name_set) {
6269 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6270 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6271 }
6272 }
6273
6274 void
6275 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6276 {
6277 struct qla_hw_data *ha = vha->hw;
6278
6279 if (!QLA_TGT_MODE_ENABLED())
6280 return;
6281
6282 if (qla_tgt_mode_enabled(vha)) {
6283 if (!ha->tgt.saved_set) {
6284 /* We save only once */
6285 ha->tgt.saved_exchange_count = nv->exchange_count;
6286 ha->tgt.saved_firmware_options_1 =
6287 nv->firmware_options_1;
6288 ha->tgt.saved_firmware_options_2 =
6289 nv->firmware_options_2;
6290 ha->tgt.saved_firmware_options_3 =
6291 nv->firmware_options_3;
6292 ha->tgt.saved_set = 1;
6293 }
6294
6295 nv->exchange_count = cpu_to_le16(0xFFFF);
6296
6297 /* Enable target mode */
6298 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6299
6300 /* Disable ini mode, if requested */
6301 if (!qla_ini_mode_enabled(vha))
6302 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6303
6304 /* Disable Full Login after LIP */
6305 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6306 /* Enable initial LIP */
6307 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6308 if (ql2xtgt_tape_enable)
6309 /* Enable FC tape support */
6310 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6311 else
6312 /* Disable FC tape support */
6313 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6314
6315 /* Disable Full Login after LIP */
6316 nv->host_p &= cpu_to_le32(~BIT_10);
6317 /* Enable target PRLI control */
6318 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6319 } else {
6320 if (ha->tgt.saved_set) {
6321 nv->exchange_count = ha->tgt.saved_exchange_count;
6322 nv->firmware_options_1 =
6323 ha->tgt.saved_firmware_options_1;
6324 nv->firmware_options_2 =
6325 ha->tgt.saved_firmware_options_2;
6326 nv->firmware_options_3 =
6327 ha->tgt.saved_firmware_options_3;
6328 }
6329 return;
6330 }
6331
6332 /* out-of-order frames reassembly */
6333 nv->firmware_options_3 |= BIT_6|BIT_9;
6334
6335 if (ha->tgt.enable_class_2) {
6336 if (vha->flags.init_done)
6337 fc_host_supported_classes(vha->host) =
6338 FC_COS_CLASS2 | FC_COS_CLASS3;
6339
6340 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6341 } else {
6342 if (vha->flags.init_done)
6343 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6344
6345 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6346 }
6347 }
6348
6349 void
6350 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6351 struct init_cb_81xx *icb)
6352 {
6353 struct qla_hw_data *ha = vha->hw;
6354
6355 if (!QLA_TGT_MODE_ENABLED())
6356 return;
6357
6358 if (ha->tgt.node_name_set) {
6359 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6360 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6361 }
6362 }
6363
6364 void
6365 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6366 {
6367 if (!QLA_TGT_MODE_ENABLED())
6368 return;
6369
6370 ha->msix_count += 1; /* For ATIO Q */
6371 }
6372
6373 int
6374 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6375 struct sts_entry_24xx *pkt)
6376 {
6377 switch (pkt->entry_type) {
6378 case ABTS_RECV_24XX:
6379 case ABTS_RESP_24XX:
6380 case CTIO_TYPE7:
6381 case NOTIFY_ACK_TYPE:
6382 case CTIO_CRC2:
6383 return 1;
6384 default:
6385 return 0;
6386 }
6387 }
6388
6389 void
6390 qlt_modify_vp_config(struct scsi_qla_host *vha,
6391 struct vp_config_entry_24xx *vpmod)
6392 {
6393 if (qla_tgt_mode_enabled(vha))
6394 vpmod->options_idx1 &= ~BIT_5;
6395 /* Disable ini mode, if requested */
6396 if (!qla_ini_mode_enabled(vha))
6397 vpmod->options_idx1 &= ~BIT_4;
6398 }
6399
6400 void
6401 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6402 {
6403 if (!QLA_TGT_MODE_ENABLED())
6404 return;
6405
6406 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6407 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6408 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6409 } else {
6410 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6411 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6412 }
6413
6414 mutex_init(&base_vha->vha_tgt.tgt_mutex);
6415 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6416 qlt_clear_mode(base_vha);
6417 }
6418
6419 irqreturn_t
6420 qla83xx_msix_atio_q(int irq, void *dev_id)
6421 {
6422 struct rsp_que *rsp;
6423 scsi_qla_host_t *vha;
6424 struct qla_hw_data *ha;
6425 unsigned long flags;
6426
6427 rsp = (struct rsp_que *) dev_id;
6428 ha = rsp->hw;
6429 vha = pci_get_drvdata(ha->pdev);
6430
6431 spin_lock_irqsave(&ha->hardware_lock, flags);
6432
6433 qlt_24xx_process_atio_queue(vha);
6434 qla24xx_process_response_queue(vha, rsp);
6435
6436 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6437
6438 return IRQ_HANDLED;
6439 }
6440
6441 int
6442 qlt_mem_alloc(struct qla_hw_data *ha)
6443 {
6444 if (!QLA_TGT_MODE_ENABLED())
6445 return 0;
6446
6447 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6448 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6449 if (!ha->tgt.tgt_vp_map)
6450 return -ENOMEM;
6451
6452 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6453 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6454 &ha->tgt.atio_dma, GFP_KERNEL);
6455 if (!ha->tgt.atio_ring) {
6456 kfree(ha->tgt.tgt_vp_map);
6457 return -ENOMEM;
6458 }
6459 return 0;
6460 }
6461
6462 void
6463 qlt_mem_free(struct qla_hw_data *ha)
6464 {
6465 if (!QLA_TGT_MODE_ENABLED())
6466 return;
6467
6468 if (ha->tgt.atio_ring) {
6469 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6470 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6471 ha->tgt.atio_dma);
6472 }
6473 kfree(ha->tgt.tgt_vp_map);
6474 }
6475
6476 /* vport_slock to be held by the caller */
6477 void
6478 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6479 {
6480 if (!QLA_TGT_MODE_ENABLED())
6481 return;
6482
6483 switch (cmd) {
6484 case SET_VP_IDX:
6485 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6486 break;
6487 case SET_AL_PA:
6488 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6489 break;
6490 case RESET_VP_IDX:
6491 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6492 break;
6493 case RESET_AL_PA:
6494 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6495 break;
6496 }
6497 }
6498
6499 static int __init qlt_parse_ini_mode(void)
6500 {
6501 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6502 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6503 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6504 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6505 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6506 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6507 else
6508 return false;
6509
6510 return true;
6511 }
6512
6513 int __init qlt_init(void)
6514 {
6515 int ret;
6516
6517 if (!qlt_parse_ini_mode()) {
6518 ql_log(ql_log_fatal, NULL, 0xe06b,
6519 "qlt_parse_ini_mode() failed\n");
6520 return -EINVAL;
6521 }
6522
6523 if (!QLA_TGT_MODE_ENABLED())
6524 return 0;
6525
6526 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6527 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6528 qla_tgt_mgmt_cmd), 0, NULL);
6529 if (!qla_tgt_mgmt_cmd_cachep) {
6530 ql_log(ql_log_fatal, NULL, 0xe06d,
6531 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6532 return -ENOMEM;
6533 }
6534
6535 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6536 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6537 if (!qla_tgt_mgmt_cmd_mempool) {
6538 ql_log(ql_log_fatal, NULL, 0xe06e,
6539 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6540 ret = -ENOMEM;
6541 goto out_mgmt_cmd_cachep;
6542 }
6543
6544 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6545 if (!qla_tgt_wq) {
6546 ql_log(ql_log_fatal, NULL, 0xe06f,
6547 "alloc_workqueue for qla_tgt_wq failed\n");
6548 ret = -ENOMEM;
6549 goto out_cmd_mempool;
6550 }
6551 /*
6552 * Return 1 to signal that initiator-mode is being disabled
6553 */
6554 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6555
6556 out_cmd_mempool:
6557 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6558 out_mgmt_cmd_cachep:
6559 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6560 return ret;
6561 }
6562
6563 void qlt_exit(void)
6564 {
6565 if (!QLA_TGT_MODE_ENABLED())
6566 return;
6567
6568 destroy_workqueue(qla_tgt_wq);
6569 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6570 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6571 }
Linux kernel - Deliverables
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