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Merge branches 'pm-sleep', 'pm-domains' and 'pm-avs'
[GitHub/LineageOS/android_kernel_motorola_exynos9610.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 __constant_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 = __constant_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 = __constant_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 =
1284 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1285 CTIO7_FLAGS_TERMINATE);
1286 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1287
1288 /* Memory Barrier */
1289 wmb();
1290 qla2x00_start_iocbs(vha, vha->req);
1291
1292 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1293 FCP_TMF_CMPL, true);
1294 }
1295
1296 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1297 {
1298 struct qla_tgt_sess_op *op;
1299 struct qla_tgt_cmd *cmd;
1300
1301 spin_lock(&vha->cmd_list_lock);
1302
1303 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1304 if (tag == op->atio.u.isp24.exchange_addr) {
1305 op->aborted = true;
1306 spin_unlock(&vha->cmd_list_lock);
1307 return 1;
1308 }
1309 }
1310
1311 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1312 if (tag == cmd->atio.u.isp24.exchange_addr) {
1313 cmd->state = QLA_TGT_STATE_ABORTED;
1314 spin_unlock(&vha->cmd_list_lock);
1315 return 1;
1316 }
1317 }
1318
1319 spin_unlock(&vha->cmd_list_lock);
1320 return 0;
1321 }
1322
1323 /* drop cmds for the given lun
1324 * XXX only looks for cmds on the port through which lun reset was recieved
1325 * XXX does not go through the list of other port (which may have cmds
1326 * for the same lun)
1327 */
1328 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1329 uint32_t lun, uint8_t *s_id)
1330 {
1331 struct qla_tgt_sess_op *op;
1332 struct qla_tgt_cmd *cmd;
1333 uint32_t key;
1334
1335 key = sid_to_key(s_id);
1336 spin_lock(&vha->cmd_list_lock);
1337 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1338 uint32_t op_key;
1339 uint32_t op_lun;
1340
1341 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1342 op_lun = scsilun_to_int(
1343 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1344 if (op_key == key && op_lun == lun)
1345 op->aborted = true;
1346 }
1347 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1348 uint32_t cmd_key;
1349 uint32_t cmd_lun;
1350
1351 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1352 cmd_lun = scsilun_to_int(
1353 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1354 if (cmd_key == key && cmd_lun == lun)
1355 cmd->state = QLA_TGT_STATE_ABORTED;
1356 }
1357 spin_unlock(&vha->cmd_list_lock);
1358 }
1359
1360 /* ha->hardware_lock supposed to be held on entry */
1361 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1362 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1363 {
1364 struct qla_hw_data *ha = vha->hw;
1365 struct se_session *se_sess = sess->se_sess;
1366 struct qla_tgt_mgmt_cmd *mcmd;
1367 struct se_cmd *se_cmd;
1368 u32 lun = 0;
1369 int rc;
1370 bool found_lun = false;
1371
1372 spin_lock(&se_sess->sess_cmd_lock);
1373 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1374 struct qla_tgt_cmd *cmd =
1375 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1376 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1377 lun = cmd->unpacked_lun;
1378 found_lun = true;
1379 break;
1380 }
1381 }
1382 spin_unlock(&se_sess->sess_cmd_lock);
1383
1384 /* cmd not in LIO lists, look in qla list */
1385 if (!found_lun) {
1386 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1387 /* send TASK_ABORT response immediately */
1388 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1389 return 0;
1390 } else {
1391 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1392 "unable to find cmd in driver or LIO for tag 0x%x\n",
1393 abts->exchange_addr_to_abort);
1394 return -ENOENT;
1395 }
1396 }
1397
1398 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1399 "qla_target(%d): task abort (tag=%d)\n",
1400 vha->vp_idx, abts->exchange_addr_to_abort);
1401
1402 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1403 if (mcmd == NULL) {
1404 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1405 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1406 vha->vp_idx, __func__);
1407 return -ENOMEM;
1408 }
1409 memset(mcmd, 0, sizeof(*mcmd));
1410
1411 mcmd->sess = sess;
1412 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1413 mcmd->reset_count = vha->hw->chip_reset;
1414
1415 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1416 abts->exchange_addr_to_abort);
1417 if (rc != 0) {
1418 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1419 "qla_target(%d): tgt_ops->handle_tmr()"
1420 " failed: %d", vha->vp_idx, rc);
1421 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1422 return -EFAULT;
1423 }
1424
1425 return 0;
1426 }
1427
1428 /*
1429 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1430 */
1431 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1432 struct abts_recv_from_24xx *abts)
1433 {
1434 struct qla_hw_data *ha = vha->hw;
1435 struct qla_tgt_sess *sess;
1436 uint32_t tag = abts->exchange_addr_to_abort;
1437 uint8_t s_id[3];
1438 int rc;
1439
1440 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1441 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1442 "qla_target(%d): ABTS: Abort Sequence not "
1443 "supported\n", vha->vp_idx);
1444 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1445 return;
1446 }
1447
1448 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1449 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1450 "qla_target(%d): ABTS: Unknown Exchange "
1451 "Address received\n", vha->vp_idx);
1452 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1453 return;
1454 }
1455
1456 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1457 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1458 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1459 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1460 le32_to_cpu(abts->fcp_hdr_le.parameter));
1461
1462 s_id[0] = abts->fcp_hdr_le.s_id[2];
1463 s_id[1] = abts->fcp_hdr_le.s_id[1];
1464 s_id[2] = abts->fcp_hdr_le.s_id[0];
1465
1466 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1467 if (!sess) {
1468 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1469 "qla_target(%d): task abort for non-existant session\n",
1470 vha->vp_idx);
1471 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1472 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1473 if (rc != 0) {
1474 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1475 false);
1476 }
1477 return;
1478 }
1479
1480 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1481 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1482 return;
1483 }
1484
1485 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1486 if (rc != 0) {
1487 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1488 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1489 vha->vp_idx, rc);
1490 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1491 return;
1492 }
1493 }
1494
1495 /*
1496 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1497 */
1498 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1499 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1500 {
1501 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1502 struct ctio7_to_24xx *ctio;
1503 uint16_t temp;
1504
1505 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1506 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1507 ha, atio, resp_code);
1508
1509 /* Send marker if required */
1510 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1511 return;
1512
1513 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1514 if (ctio == NULL) {
1515 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1516 "qla_target(%d): %s failed: unable to allocate "
1517 "request packet\n", ha->vp_idx, __func__);
1518 return;
1519 }
1520
1521 ctio->entry_type = CTIO_TYPE7;
1522 ctio->entry_count = 1;
1523 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1524 ctio->nport_handle = mcmd->sess->loop_id;
1525 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1526 ctio->vp_index = ha->vp_idx;
1527 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1528 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1529 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1530 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1531 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1532 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1533 CTIO7_FLAGS_SEND_STATUS);
1534 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1535 ctio->u.status1.ox_id = cpu_to_le16(temp);
1536 ctio->u.status1.scsi_status =
1537 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1538 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1539 ctio->u.status1.sense_data[0] = resp_code;
1540
1541 /* Memory Barrier */
1542 wmb();
1543 qla2x00_start_iocbs(ha, ha->req);
1544 }
1545
1546 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1547 {
1548 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1549 }
1550 EXPORT_SYMBOL(qlt_free_mcmd);
1551
1552 /* callback from target fabric module code */
1553 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1554 {
1555 struct scsi_qla_host *vha = mcmd->sess->vha;
1556 struct qla_hw_data *ha = vha->hw;
1557 unsigned long flags;
1558
1559 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1560 "TM response mcmd (%p) status %#x state %#x",
1561 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1562
1563 spin_lock_irqsave(&ha->hardware_lock, flags);
1564
1565 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1566 /*
1567 * Either a chip reset is active or this request was from
1568 * previous life, just abort the processing.
1569 */
1570 ql_dbg(ql_dbg_async, vha, 0xe100,
1571 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1572 qla2x00_reset_active(vha), mcmd->reset_count,
1573 ha->chip_reset);
1574 ha->tgt.tgt_ops->free_mcmd(mcmd);
1575 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1576 return;
1577 }
1578
1579 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1580 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1581 0, 0, 0, 0, 0, 0);
1582 else {
1583 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1584 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1585 mcmd->fc_tm_rsp, false);
1586 else
1587 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1588 mcmd->fc_tm_rsp);
1589 }
1590 /*
1591 * Make the callback for ->free_mcmd() to queue_work() and invoke
1592 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1593 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1594 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1595 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1596 * qlt_xmit_tm_rsp() returns here..
1597 */
1598 ha->tgt.tgt_ops->free_mcmd(mcmd);
1599 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1600 }
1601 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1602
1603 /* No locks */
1604 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1605 {
1606 struct qla_tgt_cmd *cmd = prm->cmd;
1607
1608 BUG_ON(cmd->sg_cnt == 0);
1609
1610 prm->sg = (struct scatterlist *)cmd->sg;
1611 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1612 cmd->sg_cnt, cmd->dma_data_direction);
1613 if (unlikely(prm->seg_cnt == 0))
1614 goto out_err;
1615
1616 prm->cmd->sg_mapped = 1;
1617
1618 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1619 /*
1620 * If greater than four sg entries then we need to allocate
1621 * the continuation entries
1622 */
1623 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1624 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1625 prm->tgt->datasegs_per_cmd,
1626 prm->tgt->datasegs_per_cont);
1627 } else {
1628 /* DIF */
1629 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1630 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1631 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1632 prm->tot_dsds = prm->seg_cnt;
1633 } else
1634 prm->tot_dsds = prm->seg_cnt;
1635
1636 if (cmd->prot_sg_cnt) {
1637 prm->prot_sg = cmd->prot_sg;
1638 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1639 cmd->prot_sg, cmd->prot_sg_cnt,
1640 cmd->dma_data_direction);
1641 if (unlikely(prm->prot_seg_cnt == 0))
1642 goto out_err;
1643
1644 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1645 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1646 /* Dif Bundling not support here */
1647 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1648 cmd->blk_sz);
1649 prm->tot_dsds += prm->prot_seg_cnt;
1650 } else
1651 prm->tot_dsds += prm->prot_seg_cnt;
1652 }
1653 }
1654
1655 return 0;
1656
1657 out_err:
1658 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1659 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1660 0, prm->cmd->sg_cnt);
1661 return -1;
1662 }
1663
1664 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1665 {
1666 struct qla_hw_data *ha = vha->hw;
1667
1668 if (!cmd->sg_mapped)
1669 return;
1670
1671 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1672 cmd->sg_mapped = 0;
1673
1674 if (cmd->prot_sg_cnt)
1675 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1676 cmd->dma_data_direction);
1677
1678 if (cmd->ctx_dsd_alloced)
1679 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1680
1681 if (cmd->ctx)
1682 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1683 }
1684
1685 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1686 uint32_t req_cnt)
1687 {
1688 uint32_t cnt, cnt_in;
1689
1690 if (vha->req->cnt < (req_cnt + 2)) {
1691 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1692 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1693
1694 if (vha->req->ring_index < cnt)
1695 vha->req->cnt = cnt - vha->req->ring_index;
1696 else
1697 vha->req->cnt = vha->req->length -
1698 (vha->req->ring_index - cnt);
1699 }
1700
1701 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1702 ql_dbg(ql_dbg_io, vha, 0x305a,
1703 "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",
1704 vha->vp_idx, vha->req->ring_index,
1705 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1706 return -EAGAIN;
1707 }
1708 vha->req->cnt -= req_cnt;
1709
1710 return 0;
1711 }
1712
1713 /*
1714 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1715 */
1716 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1717 {
1718 /* Adjust ring index. */
1719 vha->req->ring_index++;
1720 if (vha->req->ring_index == vha->req->length) {
1721 vha->req->ring_index = 0;
1722 vha->req->ring_ptr = vha->req->ring;
1723 } else {
1724 vha->req->ring_ptr++;
1725 }
1726 return (cont_entry_t *)vha->req->ring_ptr;
1727 }
1728
1729 /* ha->hardware_lock supposed to be held on entry */
1730 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1731 {
1732 struct qla_hw_data *ha = vha->hw;
1733 uint32_t h;
1734
1735 h = ha->tgt.current_handle;
1736 /* always increment cmd handle */
1737 do {
1738 ++h;
1739 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1740 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1741 if (h == ha->tgt.current_handle) {
1742 ql_dbg(ql_dbg_io, vha, 0x305b,
1743 "qla_target(%d): Ran out of "
1744 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1745 h = QLA_TGT_NULL_HANDLE;
1746 break;
1747 }
1748 } while ((h == QLA_TGT_NULL_HANDLE) ||
1749 (h == QLA_TGT_SKIP_HANDLE) ||
1750 (ha->tgt.cmds[h-1] != NULL));
1751
1752 if (h != QLA_TGT_NULL_HANDLE)
1753 ha->tgt.current_handle = h;
1754
1755 return h;
1756 }
1757
1758 /* ha->hardware_lock supposed to be held on entry */
1759 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1760 struct scsi_qla_host *vha)
1761 {
1762 uint32_t h;
1763 struct ctio7_to_24xx *pkt;
1764 struct qla_hw_data *ha = vha->hw;
1765 struct atio_from_isp *atio = &prm->cmd->atio;
1766 uint16_t temp;
1767
1768 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1769 prm->pkt = pkt;
1770 memset(pkt, 0, sizeof(*pkt));
1771
1772 pkt->entry_type = CTIO_TYPE7;
1773 pkt->entry_count = (uint8_t)prm->req_cnt;
1774 pkt->vp_index = vha->vp_idx;
1775
1776 h = qlt_make_handle(vha);
1777 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1778 /*
1779 * CTIO type 7 from the firmware doesn't provide a way to
1780 * know the initiator's LOOP ID, hence we can't find
1781 * the session and, so, the command.
1782 */
1783 return -EAGAIN;
1784 } else
1785 ha->tgt.cmds[h-1] = prm->cmd;
1786
1787 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1788 pkt->nport_handle = prm->cmd->loop_id;
1789 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1790 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1791 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1792 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1793 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1794 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1795 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1796 pkt->u.status0.ox_id = cpu_to_le16(temp);
1797 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1798
1799 return 0;
1800 }
1801
1802 /*
1803 * ha->hardware_lock supposed to be held on entry. We have already made sure
1804 * that there is sufficient amount of request entries to not drop it.
1805 */
1806 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1807 struct scsi_qla_host *vha)
1808 {
1809 int cnt;
1810 uint32_t *dword_ptr;
1811 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1812
1813 /* Build continuation packets */
1814 while (prm->seg_cnt > 0) {
1815 cont_a64_entry_t *cont_pkt64 =
1816 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1817
1818 /*
1819 * Make sure that from cont_pkt64 none of
1820 * 64-bit specific fields used for 32-bit
1821 * addressing. Cast to (cont_entry_t *) for
1822 * that.
1823 */
1824
1825 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1826
1827 cont_pkt64->entry_count = 1;
1828 cont_pkt64->sys_define = 0;
1829
1830 if (enable_64bit_addressing) {
1831 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1832 dword_ptr =
1833 (uint32_t *)&cont_pkt64->dseg_0_address;
1834 } else {
1835 cont_pkt64->entry_type = CONTINUE_TYPE;
1836 dword_ptr =
1837 (uint32_t *)&((cont_entry_t *)
1838 cont_pkt64)->dseg_0_address;
1839 }
1840
1841 /* Load continuation entry data segments */
1842 for (cnt = 0;
1843 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1844 cnt++, prm->seg_cnt--) {
1845 *dword_ptr++ =
1846 cpu_to_le32(pci_dma_lo32
1847 (sg_dma_address(prm->sg)));
1848 if (enable_64bit_addressing) {
1849 *dword_ptr++ =
1850 cpu_to_le32(pci_dma_hi32
1851 (sg_dma_address
1852 (prm->sg)));
1853 }
1854 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1855
1856 prm->sg = sg_next(prm->sg);
1857 }
1858 }
1859 }
1860
1861 /*
1862 * ha->hardware_lock supposed to be held on entry. We have already made sure
1863 * that there is sufficient amount of request entries to not drop it.
1864 */
1865 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1866 struct scsi_qla_host *vha)
1867 {
1868 int cnt;
1869 uint32_t *dword_ptr;
1870 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1871 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1872
1873 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1874
1875 /* Setup packet address segment pointer */
1876 dword_ptr = pkt24->u.status0.dseg_0_address;
1877
1878 /* Set total data segment count */
1879 if (prm->seg_cnt)
1880 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1881
1882 if (prm->seg_cnt == 0) {
1883 /* No data transfer */
1884 *dword_ptr++ = 0;
1885 *dword_ptr = 0;
1886 return;
1887 }
1888
1889 /* If scatter gather */
1890
1891 /* Load command entry data segments */
1892 for (cnt = 0;
1893 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1894 cnt++, prm->seg_cnt--) {
1895 *dword_ptr++ =
1896 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1897 if (enable_64bit_addressing) {
1898 *dword_ptr++ =
1899 cpu_to_le32(pci_dma_hi32(
1900 sg_dma_address(prm->sg)));
1901 }
1902 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1903
1904 prm->sg = sg_next(prm->sg);
1905 }
1906
1907 qlt_load_cont_data_segments(prm, vha);
1908 }
1909
1910 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1911 {
1912 return cmd->bufflen > 0;
1913 }
1914
1915 /*
1916 * Called without ha->hardware_lock held
1917 */
1918 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1919 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1920 uint32_t *full_req_cnt)
1921 {
1922 struct qla_tgt *tgt = cmd->tgt;
1923 struct scsi_qla_host *vha = tgt->vha;
1924 struct qla_hw_data *ha = vha->hw;
1925 struct se_cmd *se_cmd = &cmd->se_cmd;
1926
1927 prm->cmd = cmd;
1928 prm->tgt = tgt;
1929 prm->rq_result = scsi_status;
1930 prm->sense_buffer = &cmd->sense_buffer[0];
1931 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1932 prm->sg = NULL;
1933 prm->seg_cnt = -1;
1934 prm->req_cnt = 1;
1935 prm->add_status_pkt = 0;
1936
1937 /* Send marker if required */
1938 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1939 return -EFAULT;
1940
1941 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1942 if (qlt_pci_map_calc_cnt(prm) != 0)
1943 return -EAGAIN;
1944 }
1945
1946 *full_req_cnt = prm->req_cnt;
1947
1948 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1949 prm->residual = se_cmd->residual_count;
1950 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1951 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1952 prm->residual, se_cmd->tag,
1953 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1954 cmd->bufflen, prm->rq_result);
1955 prm->rq_result |= SS_RESIDUAL_UNDER;
1956 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1957 prm->residual = se_cmd->residual_count;
1958 ql_dbg(ql_dbg_io, vha, 0x305d,
1959 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1960 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1961 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1962 prm->rq_result |= SS_RESIDUAL_OVER;
1963 }
1964
1965 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1966 /*
1967 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1968 * ignored in *xmit_response() below
1969 */
1970 if (qlt_has_data(cmd)) {
1971 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1972 (IS_FWI2_CAPABLE(ha) &&
1973 (prm->rq_result != 0))) {
1974 prm->add_status_pkt = 1;
1975 (*full_req_cnt)++;
1976 }
1977 }
1978 }
1979
1980 return 0;
1981 }
1982
1983 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1984 struct qla_tgt_cmd *cmd, int sending_sense)
1985 {
1986 if (ha->tgt.enable_class_2)
1987 return 0;
1988
1989 if (sending_sense)
1990 return cmd->conf_compl_supported;
1991 else
1992 return ha->tgt.enable_explicit_conf &&
1993 cmd->conf_compl_supported;
1994 }
1995
1996 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1997 /*
1998 * Original taken from the XFS code
1999 */
2000 static unsigned long qlt_srr_random(void)
2001 {
2002 static int Inited;
2003 static unsigned long RandomValue;
2004 static DEFINE_SPINLOCK(lock);
2005 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2006 register long rv;
2007 register long lo;
2008 register long hi;
2009 unsigned long flags;
2010
2011 spin_lock_irqsave(&lock, flags);
2012 if (!Inited) {
2013 RandomValue = jiffies;
2014 Inited = 1;
2015 }
2016 rv = RandomValue;
2017 hi = rv / 127773;
2018 lo = rv % 127773;
2019 rv = 16807 * lo - 2836 * hi;
2020 if (rv <= 0)
2021 rv += 2147483647;
2022 RandomValue = rv;
2023 spin_unlock_irqrestore(&lock, flags);
2024 return rv;
2025 }
2026
2027 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2028 {
2029 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2030 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2031 == 50) {
2032 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2033 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2034 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2035 }
2036 #endif
2037 /*
2038 * It's currently not possible to simulate SRRs for FCP_WRITE without
2039 * a physical link layer failure, so don't even try here..
2040 */
2041 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2042 return;
2043
2044 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2045 ((qlt_srr_random() % 100) == 20)) {
2046 int i, leave = 0;
2047 unsigned int tot_len = 0;
2048
2049 while (leave == 0)
2050 leave = qlt_srr_random() % cmd->sg_cnt;
2051
2052 for (i = 0; i < leave; i++)
2053 tot_len += cmd->sg[i].length;
2054
2055 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2056 "Cutting cmd %p (tag %d) buffer"
2057 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2058 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2059 cmd->bufflen, cmd->sg_cnt);
2060
2061 cmd->bufflen = tot_len;
2062 cmd->sg_cnt = leave;
2063 }
2064
2065 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2066 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2067
2068 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2069 "Cutting cmd %p (tag %d) buffer head "
2070 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2071 cmd->bufflen);
2072 if (offset == 0)
2073 *xmit_type &= ~QLA_TGT_XMIT_DATA;
2074 else if (qlt_set_data_offset(cmd, offset)) {
2075 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2076 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2077 }
2078 }
2079 }
2080 #else
2081 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2082 {}
2083 #endif
2084
2085 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2086 struct qla_tgt_prm *prm)
2087 {
2088 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2089 (uint32_t)sizeof(ctio->u.status1.sense_data));
2090 ctio->u.status0.flags |=
2091 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2092 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2093 ctio->u.status0.flags |= __constant_cpu_to_le16(
2094 CTIO7_FLAGS_EXPLICIT_CONFORM |
2095 CTIO7_FLAGS_CONFORM_REQ);
2096 }
2097 ctio->u.status0.residual = cpu_to_le32(prm->residual);
2098 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2099 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2100 int i;
2101
2102 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2103 if (prm->cmd->se_cmd.scsi_status != 0) {
2104 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2105 "Skipping EXPLICIT_CONFORM and "
2106 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2107 "non GOOD status\n");
2108 goto skip_explict_conf;
2109 }
2110 ctio->u.status1.flags |= __constant_cpu_to_le16(
2111 CTIO7_FLAGS_EXPLICIT_CONFORM |
2112 CTIO7_FLAGS_CONFORM_REQ);
2113 }
2114 skip_explict_conf:
2115 ctio->u.status1.flags &=
2116 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2117 ctio->u.status1.flags |=
2118 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2119 ctio->u.status1.scsi_status |=
2120 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
2121 ctio->u.status1.sense_length =
2122 cpu_to_le16(prm->sense_buffer_len);
2123 for (i = 0; i < prm->sense_buffer_len/4; i++)
2124 ((uint32_t *)ctio->u.status1.sense_data)[i] =
2125 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2126 #if 0
2127 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2128 static int q;
2129 if (q < 10) {
2130 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2131 "qla_target(%d): %d bytes of sense "
2132 "lost", prm->tgt->ha->vp_idx,
2133 prm->sense_buffer_len % 4);
2134 q++;
2135 }
2136 }
2137 #endif
2138 } else {
2139 ctio->u.status1.flags &=
2140 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2141 ctio->u.status1.flags |=
2142 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2143 ctio->u.status1.sense_length = 0;
2144 memset(ctio->u.status1.sense_data, 0,
2145 sizeof(ctio->u.status1.sense_data));
2146 }
2147
2148 /* Sense with len > 24, is it possible ??? */
2149 }
2150
2151
2152
2153 /* diff */
2154 static inline int
2155 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2156 {
2157 /*
2158 * Uncomment when corresponding SCSI changes are done.
2159 *
2160 if (!sp->cmd->prot_chk)
2161 return 0;
2162 *
2163 */
2164 switch (se_cmd->prot_op) {
2165 case TARGET_PROT_DOUT_INSERT:
2166 case TARGET_PROT_DIN_STRIP:
2167 if (ql2xenablehba_err_chk >= 1)
2168 return 1;
2169 break;
2170 case TARGET_PROT_DOUT_PASS:
2171 case TARGET_PROT_DIN_PASS:
2172 if (ql2xenablehba_err_chk >= 2)
2173 return 1;
2174 break;
2175 case TARGET_PROT_DIN_INSERT:
2176 case TARGET_PROT_DOUT_STRIP:
2177 return 1;
2178 default:
2179 break;
2180 }
2181 return 0;
2182 }
2183
2184 /*
2185 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2186 *
2187 */
2188 static inline void
2189 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2190 {
2191 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2192
2193 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2194 * have been immplemented by TCM, before AppTag is avail.
2195 * Look for modesense_handlers[]
2196 */
2197 ctx->app_tag = 0;
2198 ctx->app_tag_mask[0] = 0x0;
2199 ctx->app_tag_mask[1] = 0x0;
2200
2201 switch (se_cmd->prot_type) {
2202 case TARGET_DIF_TYPE0_PROT:
2203 /*
2204 * No check for ql2xenablehba_err_chk, as it would be an
2205 * I/O error if hba tag generation is not done.
2206 */
2207 ctx->ref_tag = cpu_to_le32(lba);
2208
2209 if (!qlt_hba_err_chk_enabled(se_cmd))
2210 break;
2211
2212 /* enable ALL bytes of the ref tag */
2213 ctx->ref_tag_mask[0] = 0xff;
2214 ctx->ref_tag_mask[1] = 0xff;
2215 ctx->ref_tag_mask[2] = 0xff;
2216 ctx->ref_tag_mask[3] = 0xff;
2217 break;
2218 /*
2219 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2220 * 16 bit app tag.
2221 */
2222 case TARGET_DIF_TYPE1_PROT:
2223 ctx->ref_tag = cpu_to_le32(lba);
2224
2225 if (!qlt_hba_err_chk_enabled(se_cmd))
2226 break;
2227
2228 /* enable ALL bytes of the ref tag */
2229 ctx->ref_tag_mask[0] = 0xff;
2230 ctx->ref_tag_mask[1] = 0xff;
2231 ctx->ref_tag_mask[2] = 0xff;
2232 ctx->ref_tag_mask[3] = 0xff;
2233 break;
2234 /*
2235 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2236 * match LBA in CDB + N
2237 */
2238 case TARGET_DIF_TYPE2_PROT:
2239 ctx->ref_tag = cpu_to_le32(lba);
2240
2241 if (!qlt_hba_err_chk_enabled(se_cmd))
2242 break;
2243
2244 /* enable ALL bytes of the ref tag */
2245 ctx->ref_tag_mask[0] = 0xff;
2246 ctx->ref_tag_mask[1] = 0xff;
2247 ctx->ref_tag_mask[2] = 0xff;
2248 ctx->ref_tag_mask[3] = 0xff;
2249 break;
2250
2251 /* For Type 3 protection: 16 bit GUARD only */
2252 case TARGET_DIF_TYPE3_PROT:
2253 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2254 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2255 break;
2256 }
2257 }
2258
2259
2260 static inline int
2261 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2262 {
2263 uint32_t *cur_dsd;
2264 int sgc;
2265 uint32_t transfer_length = 0;
2266 uint32_t data_bytes;
2267 uint32_t dif_bytes;
2268 uint8_t bundling = 1;
2269 uint8_t *clr_ptr;
2270 struct crc_context *crc_ctx_pkt = NULL;
2271 struct qla_hw_data *ha;
2272 struct ctio_crc2_to_fw *pkt;
2273 dma_addr_t crc_ctx_dma;
2274 uint16_t fw_prot_opts = 0;
2275 struct qla_tgt_cmd *cmd = prm->cmd;
2276 struct se_cmd *se_cmd = &cmd->se_cmd;
2277 uint32_t h;
2278 struct atio_from_isp *atio = &prm->cmd->atio;
2279 uint16_t t16;
2280
2281 sgc = 0;
2282 ha = vha->hw;
2283
2284 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2285 prm->pkt = pkt;
2286 memset(pkt, 0, sizeof(*pkt));
2287
2288 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2289 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2290 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2291 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2292
2293 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2294 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2295 bundling = 0;
2296
2297 /* Compute dif len and adjust data len to incude protection */
2298 data_bytes = cmd->bufflen;
2299 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2300
2301 switch (se_cmd->prot_op) {
2302 case TARGET_PROT_DIN_INSERT:
2303 case TARGET_PROT_DOUT_STRIP:
2304 transfer_length = data_bytes;
2305 data_bytes += dif_bytes;
2306 break;
2307
2308 case TARGET_PROT_DIN_STRIP:
2309 case TARGET_PROT_DOUT_INSERT:
2310 case TARGET_PROT_DIN_PASS:
2311 case TARGET_PROT_DOUT_PASS:
2312 transfer_length = data_bytes + dif_bytes;
2313 break;
2314
2315 default:
2316 BUG();
2317 break;
2318 }
2319
2320 if (!qlt_hba_err_chk_enabled(se_cmd))
2321 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2322 /* HBA error checking enabled */
2323 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2324 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2325 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2326 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2327 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2328 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2329 }
2330
2331 switch (se_cmd->prot_op) {
2332 case TARGET_PROT_DIN_INSERT:
2333 case TARGET_PROT_DOUT_INSERT:
2334 fw_prot_opts |= PO_MODE_DIF_INSERT;
2335 break;
2336 case TARGET_PROT_DIN_STRIP:
2337 case TARGET_PROT_DOUT_STRIP:
2338 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2339 break;
2340 case TARGET_PROT_DIN_PASS:
2341 case TARGET_PROT_DOUT_PASS:
2342 fw_prot_opts |= PO_MODE_DIF_PASS;
2343 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2344 break;
2345 default:/* Normal Request */
2346 fw_prot_opts |= PO_MODE_DIF_PASS;
2347 break;
2348 }
2349
2350
2351 /* ---- PKT ---- */
2352 /* Update entry type to indicate Command Type CRC_2 IOCB */
2353 pkt->entry_type = CTIO_CRC2;
2354 pkt->entry_count = 1;
2355 pkt->vp_index = vha->vp_idx;
2356
2357 h = qlt_make_handle(vha);
2358 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2359 /*
2360 * CTIO type 7 from the firmware doesn't provide a way to
2361 * know the initiator's LOOP ID, hence we can't find
2362 * the session and, so, the command.
2363 */
2364 return -EAGAIN;
2365 } else
2366 ha->tgt.cmds[h-1] = prm->cmd;
2367
2368
2369 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2370 pkt->nport_handle = prm->cmd->loop_id;
2371 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2372 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2373 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2374 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2375 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2376
2377 /* silence compile warning */
2378 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2379 pkt->ox_id = cpu_to_le16(t16);
2380
2381 t16 = (atio->u.isp24.attr << 9);
2382 pkt->flags |= cpu_to_le16(t16);
2383 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2384
2385 /* Set transfer direction */
2386 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2387 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2388 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2389 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2390
2391
2392 pkt->dseg_count = prm->tot_dsds;
2393 /* Fibre channel byte count */
2394 pkt->transfer_length = cpu_to_le32(transfer_length);
2395
2396
2397 /* ----- CRC context -------- */
2398
2399 /* Allocate CRC context from global pool */
2400 crc_ctx_pkt = cmd->ctx =
2401 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2402
2403 if (!crc_ctx_pkt)
2404 goto crc_queuing_error;
2405
2406 /* Zero out CTX area. */
2407 clr_ptr = (uint8_t *)crc_ctx_pkt;
2408 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2409
2410 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2411 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2412
2413 /* Set handle */
2414 crc_ctx_pkt->handle = pkt->handle;
2415
2416 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2417
2418 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2419 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2420 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2421
2422
2423 if (!bundling) {
2424 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2425 } else {
2426 /*
2427 * Configure Bundling if we need to fetch interlaving
2428 * protection PCI accesses
2429 */
2430 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2431 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2432 crc_ctx_pkt->u.bundling.dseg_count =
2433 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2434 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2435 }
2436
2437 /* Finish the common fields of CRC pkt */
2438 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2439 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2440 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2441 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2442
2443
2444 /* Walks data segments */
2445 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2446
2447 if (!bundling && prm->prot_seg_cnt) {
2448 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2449 prm->tot_dsds, cmd))
2450 goto crc_queuing_error;
2451 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2452 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2453 goto crc_queuing_error;
2454
2455 if (bundling && prm->prot_seg_cnt) {
2456 /* Walks dif segments */
2457 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2458
2459 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2460 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2461 prm->prot_seg_cnt, cmd))
2462 goto crc_queuing_error;
2463 }
2464 return QLA_SUCCESS;
2465
2466 crc_queuing_error:
2467 /* Cleanup will be performed by the caller */
2468
2469 return QLA_FUNCTION_FAILED;
2470 }
2471
2472
2473 /*
2474 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2475 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2476 */
2477 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2478 uint8_t scsi_status)
2479 {
2480 struct scsi_qla_host *vha = cmd->vha;
2481 struct qla_hw_data *ha = vha->hw;
2482 struct ctio7_to_24xx *pkt;
2483 struct qla_tgt_prm prm;
2484 uint32_t full_req_cnt = 0;
2485 unsigned long flags = 0;
2486 int res;
2487
2488 spin_lock_irqsave(&ha->hardware_lock, flags);
2489 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2490 cmd->state = QLA_TGT_STATE_PROCESSED;
2491 if (cmd->sess->logout_completed)
2492 /* no need to terminate. FW already freed exchange. */
2493 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2494 else
2495 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2496 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2497 return 0;
2498 }
2499 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2500
2501 memset(&prm, 0, sizeof(prm));
2502 qlt_check_srr_debug(cmd, &xmit_type);
2503
2504 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2505 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2506 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2507 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2508 &cmd->se_cmd);
2509
2510 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2511 &full_req_cnt);
2512 if (unlikely(res != 0)) {
2513 return res;
2514 }
2515
2516 spin_lock_irqsave(&ha->hardware_lock, flags);
2517
2518 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2519 /*
2520 * Either a chip reset is active or this request was from
2521 * previous life, just abort the processing.
2522 */
2523 cmd->state = QLA_TGT_STATE_PROCESSED;
2524 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2525 ql_dbg(ql_dbg_async, vha, 0xe101,
2526 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2527 qla2x00_reset_active(vha), cmd->reset_count,
2528 ha->chip_reset);
2529 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2530 return 0;
2531 }
2532
2533 /* Does F/W have an IOCBs for this request */
2534 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2535 if (unlikely(res))
2536 goto out_unmap_unlock;
2537
2538 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2539 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2540 else
2541 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2542 if (unlikely(res != 0)) {
2543 vha->req->cnt += full_req_cnt;
2544 goto out_unmap_unlock;
2545 }
2546
2547 pkt = (struct ctio7_to_24xx *)prm.pkt;
2548
2549 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2550 pkt->u.status0.flags |=
2551 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2552 CTIO7_FLAGS_STATUS_MODE_0);
2553
2554 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2555 qlt_load_data_segments(&prm, vha);
2556
2557 if (prm.add_status_pkt == 0) {
2558 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2559 pkt->u.status0.scsi_status =
2560 cpu_to_le16(prm.rq_result);
2561 pkt->u.status0.residual =
2562 cpu_to_le32(prm.residual);
2563 pkt->u.status0.flags |= __constant_cpu_to_le16(
2564 CTIO7_FLAGS_SEND_STATUS);
2565 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2566 pkt->u.status0.flags |=
2567 __constant_cpu_to_le16(
2568 CTIO7_FLAGS_EXPLICIT_CONFORM |
2569 CTIO7_FLAGS_CONFORM_REQ);
2570 }
2571 }
2572
2573 } else {
2574 /*
2575 * We have already made sure that there is sufficient
2576 * amount of request entries to not drop HW lock in
2577 * req_pkt().
2578 */
2579 struct ctio7_to_24xx *ctio =
2580 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2581
2582 ql_dbg(ql_dbg_io, vha, 0x305e,
2583 "Building additional status packet 0x%p.\n",
2584 ctio);
2585
2586 /*
2587 * T10Dif: ctio_crc2_to_fw overlay ontop of
2588 * ctio7_to_24xx
2589 */
2590 memcpy(ctio, pkt, sizeof(*ctio));
2591 /* reset back to CTIO7 */
2592 ctio->entry_count = 1;
2593 ctio->entry_type = CTIO_TYPE7;
2594 ctio->dseg_count = 0;
2595 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2596 CTIO7_FLAGS_DATA_IN);
2597
2598 /* Real finish is ctio_m1's finish */
2599 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2600 pkt->u.status0.flags |= __constant_cpu_to_le16(
2601 CTIO7_FLAGS_DONT_RET_CTIO);
2602
2603 /* qlt_24xx_init_ctio_to_isp will correct
2604 * all neccessary fields that's part of CTIO7.
2605 * There should be no residual of CTIO-CRC2 data.
2606 */
2607 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2608 &prm);
2609 pr_debug("Status CTIO7: %p\n", ctio);
2610 }
2611 } else
2612 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2613
2614
2615 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2616 cmd->cmd_sent_to_fw = 1;
2617
2618 /* Memory Barrier */
2619 wmb();
2620 qla2x00_start_iocbs(vha, vha->req);
2621 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2622
2623 return 0;
2624
2625 out_unmap_unlock:
2626 qlt_unmap_sg(vha, cmd);
2627 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2628
2629 return res;
2630 }
2631 EXPORT_SYMBOL(qlt_xmit_response);
2632
2633 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2634 {
2635 struct ctio7_to_24xx *pkt;
2636 struct scsi_qla_host *vha = cmd->vha;
2637 struct qla_hw_data *ha = vha->hw;
2638 struct qla_tgt *tgt = cmd->tgt;
2639 struct qla_tgt_prm prm;
2640 unsigned long flags;
2641 int res = 0;
2642
2643 memset(&prm, 0, sizeof(prm));
2644 prm.cmd = cmd;
2645 prm.tgt = tgt;
2646 prm.sg = NULL;
2647 prm.req_cnt = 1;
2648
2649 /* Send marker if required */
2650 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2651 return -EIO;
2652
2653 /* Calculate number of entries and segments required */
2654 if (qlt_pci_map_calc_cnt(&prm) != 0)
2655 return -EAGAIN;
2656
2657 spin_lock_irqsave(&ha->hardware_lock, flags);
2658
2659 if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) ||
2660 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2661 /*
2662 * Either a chip reset is active or this request was from
2663 * previous life, just abort the processing.
2664 */
2665 cmd->state = QLA_TGT_STATE_NEED_DATA;
2666 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2667 ql_dbg(ql_dbg_async, vha, 0xe102,
2668 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2669 qla2x00_reset_active(vha), cmd->reset_count,
2670 ha->chip_reset);
2671 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2672 return 0;
2673 }
2674
2675 /* Does F/W have an IOCBs for this request */
2676 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2677 if (res != 0)
2678 goto out_unlock_free_unmap;
2679 if (cmd->se_cmd.prot_op)
2680 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2681 else
2682 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2683
2684 if (unlikely(res != 0)) {
2685 vha->req->cnt += prm.req_cnt;
2686 goto out_unlock_free_unmap;
2687 }
2688
2689 pkt = (struct ctio7_to_24xx *)prm.pkt;
2690 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2691 CTIO7_FLAGS_STATUS_MODE_0);
2692
2693 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2694 qlt_load_data_segments(&prm, vha);
2695
2696 cmd->state = QLA_TGT_STATE_NEED_DATA;
2697 cmd->cmd_sent_to_fw = 1;
2698
2699 /* Memory Barrier */
2700 wmb();
2701 qla2x00_start_iocbs(vha, vha->req);
2702 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2703
2704 return res;
2705
2706 out_unlock_free_unmap:
2707 qlt_unmap_sg(vha, cmd);
2708 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2709
2710 return res;
2711 }
2712 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2713
2714
2715 /*
2716 * Checks the guard or meta-data for the type of error
2717 * detected by the HBA.
2718 */
2719 static inline int
2720 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2721 struct ctio_crc_from_fw *sts)
2722 {
2723 uint8_t *ap = &sts->actual_dif[0];
2724 uint8_t *ep = &sts->expected_dif[0];
2725 uint32_t e_ref_tag, a_ref_tag;
2726 uint16_t e_app_tag, a_app_tag;
2727 uint16_t e_guard, a_guard;
2728 uint64_t lba = cmd->se_cmd.t_task_lba;
2729
2730 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2731 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2732 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2733
2734 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2735 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2736 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2737
2738 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2739 "iocb(s) %p Returned STATUS.\n", sts);
2740
2741 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2742 "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",
2743 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2744 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2745
2746 /*
2747 * Ignore sector if:
2748 * For type 3: ref & app tag is all 'f's
2749 * For type 0,1,2: app tag is all 'f's
2750 */
2751 if ((a_app_tag == 0xffff) &&
2752 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2753 (a_ref_tag == 0xffffffff))) {
2754 uint32_t blocks_done;
2755
2756 /* 2TB boundary case covered automatically with this */
2757 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2758 cmd->se_cmd.bad_sector = e_ref_tag;
2759 cmd->se_cmd.pi_err = 0;
2760 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2761 "need to return scsi good\n");
2762
2763 /* Update protection tag */
2764 if (cmd->prot_sg_cnt) {
2765 uint32_t i, j = 0, k = 0, num_ent;
2766 struct scatterlist *sg, *sgl;
2767
2768
2769 sgl = cmd->prot_sg;
2770
2771 /* Patch the corresponding protection tags */
2772 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2773 num_ent = sg_dma_len(sg) / 8;
2774 if (k + num_ent < blocks_done) {
2775 k += num_ent;
2776 continue;
2777 }
2778 j = blocks_done - k - 1;
2779 k = blocks_done;
2780 break;
2781 }
2782
2783 if (k != blocks_done) {
2784 ql_log(ql_log_warn, vha, 0xf076,
2785 "unexpected tag values tag:lba=%u:%llu)\n",
2786 e_ref_tag, (unsigned long long)lba);
2787 goto out;
2788 }
2789
2790 #if 0
2791 struct sd_dif_tuple *spt;
2792 /* TODO:
2793 * This section came from initiator. Is it valid here?
2794 * should ulp be override with actual val???
2795 */
2796 spt = page_address(sg_page(sg)) + sg->offset;
2797 spt += j;
2798
2799 spt->app_tag = 0xffff;
2800 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2801 spt->ref_tag = 0xffffffff;
2802 #endif
2803 }
2804
2805 return 0;
2806 }
2807
2808 /* check guard */
2809 if (e_guard != a_guard) {
2810 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2811 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2812
2813 ql_log(ql_log_warn, vha, 0xe076,
2814 "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",
2815 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2816 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2817 a_guard, e_guard, cmd);
2818 goto out;
2819 }
2820
2821 /* check ref tag */
2822 if (e_ref_tag != a_ref_tag) {
2823 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2824 cmd->se_cmd.bad_sector = e_ref_tag;
2825
2826 ql_log(ql_log_warn, vha, 0xe077,
2827 "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",
2828 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2829 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2830 a_guard, e_guard, cmd);
2831 goto out;
2832 }
2833
2834 /* check appl tag */
2835 if (e_app_tag != a_app_tag) {
2836 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2837 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2838
2839 ql_log(ql_log_warn, vha, 0xe078,
2840 "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",
2841 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2842 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2843 a_guard, e_guard, cmd);
2844 goto out;
2845 }
2846 out:
2847 return 1;
2848 }
2849
2850
2851 /* If hardware_lock held on entry, might drop it, then reaquire */
2852 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2853 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2854 struct imm_ntfy_from_isp *ntfy)
2855 {
2856 struct nack_to_isp *nack;
2857 struct qla_hw_data *ha = vha->hw;
2858 request_t *pkt;
2859 int ret = 0;
2860
2861 ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
2862 "Sending TERM ELS CTIO (ha=%p)\n", ha);
2863
2864 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2865 if (pkt == NULL) {
2866 ql_dbg(ql_dbg_tgt, vha, 0xe080,
2867 "qla_target(%d): %s failed: unable to allocate "
2868 "request packet\n", vha->vp_idx, __func__);
2869 return -ENOMEM;
2870 }
2871
2872 pkt->entry_type = NOTIFY_ACK_TYPE;
2873 pkt->entry_count = 1;
2874 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2875
2876 nack = (struct nack_to_isp *)pkt;
2877 nack->ox_id = ntfy->ox_id;
2878
2879 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
2880 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
2881 nack->u.isp24.flags = ntfy->u.isp24.flags &
2882 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
2883 }
2884
2885 /* terminate */
2886 nack->u.isp24.flags |=
2887 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
2888
2889 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
2890 nack->u.isp24.status = ntfy->u.isp24.status;
2891 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
2892 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
2893 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
2894 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
2895 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
2896 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
2897
2898 qla2x00_start_iocbs(vha, vha->req);
2899 return ret;
2900 }
2901
2902 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2903 struct imm_ntfy_from_isp *imm, int ha_locked)
2904 {
2905 unsigned long flags = 0;
2906 int rc;
2907
2908 if (qlt_issue_marker(vha, ha_locked) < 0)
2909 return;
2910
2911 if (ha_locked) {
2912 rc = __qlt_send_term_imm_notif(vha, imm);
2913
2914 #if 0 /* Todo */
2915 if (rc == -ENOMEM)
2916 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2917 #endif
2918 goto done;
2919 }
2920
2921 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2922 rc = __qlt_send_term_imm_notif(vha, imm);
2923
2924 #if 0 /* Todo */
2925 if (rc == -ENOMEM)
2926 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2927 #endif
2928
2929 done:
2930 if (!ha_locked)
2931 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2932 }
2933
2934 /* If hardware_lock held on entry, might drop it, then reaquire */
2935 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2936 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2937 struct qla_tgt_cmd *cmd,
2938 struct atio_from_isp *atio)
2939 {
2940 struct ctio7_to_24xx *ctio24;
2941 struct qla_hw_data *ha = vha->hw;
2942 request_t *pkt;
2943 int ret = 0;
2944 uint16_t temp;
2945
2946 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2947
2948 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2949 if (pkt == NULL) {
2950 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2951 "qla_target(%d): %s failed: unable to allocate "
2952 "request packet\n", vha->vp_idx, __func__);
2953 return -ENOMEM;
2954 }
2955
2956 if (cmd != NULL) {
2957 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2958 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2959 "qla_target(%d): Terminating cmd %p with "
2960 "incorrect state %d\n", vha->vp_idx, cmd,
2961 cmd->state);
2962 } else
2963 ret = 1;
2964 }
2965
2966 pkt->entry_count = 1;
2967 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2968
2969 ctio24 = (struct ctio7_to_24xx *)pkt;
2970 ctio24->entry_type = CTIO_TYPE7;
2971 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2972 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2973 ctio24->vp_index = vha->vp_idx;
2974 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2975 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2976 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2977 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2978 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2979 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2980 CTIO7_FLAGS_TERMINATE);
2981 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2982 ctio24->u.status1.ox_id = cpu_to_le16(temp);
2983
2984 /* Most likely, it isn't needed */
2985 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2986 &atio->u.isp24.fcp_cmnd.add_cdb[
2987 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2988 if (ctio24->u.status1.residual != 0)
2989 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2990
2991 /* Memory Barrier */
2992 wmb();
2993 qla2x00_start_iocbs(vha, vha->req);
2994 return ret;
2995 }
2996
2997 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2998 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2999 {
3000 unsigned long flags = 0;
3001 int rc;
3002
3003 if (qlt_issue_marker(vha, ha_locked) < 0)
3004 return;
3005
3006 if (ha_locked) {
3007 rc = __qlt_send_term_exchange(vha, cmd, atio);
3008 if (rc == -ENOMEM)
3009 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3010 goto done;
3011 }
3012 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3013 rc = __qlt_send_term_exchange(vha, cmd, atio);
3014 if (rc == -ENOMEM)
3015 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3016
3017 done:
3018 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
3019 !cmd->cmd_sent_to_fw)) {
3020 if (cmd->sg_mapped)
3021 qlt_unmap_sg(vha, cmd);
3022 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3023 }
3024
3025 if (!ha_locked)
3026 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3027
3028 return;
3029 }
3030
3031 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3032 {
3033 struct list_head free_list;
3034 struct qla_tgt_cmd *cmd, *tcmd;
3035
3036 vha->hw->tgt.leak_exchg_thresh_hold =
3037 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3038
3039 cmd = tcmd = NULL;
3040 if (!list_empty(&vha->hw->tgt.q_full_list)) {
3041 INIT_LIST_HEAD(&free_list);
3042 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3043
3044 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3045 list_del(&cmd->cmd_list);
3046 /* This cmd was never sent to TCM. There is no need
3047 * to schedule free or call free_cmd
3048 */
3049 qlt_free_cmd(cmd);
3050 vha->hw->tgt.num_qfull_cmds_alloc--;
3051 }
3052 }
3053 vha->hw->tgt.num_qfull_cmds_dropped = 0;
3054 }
3055
3056 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3057 {
3058 uint32_t total_leaked;
3059
3060 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3061
3062 if (vha->hw->tgt.leak_exchg_thresh_hold &&
3063 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3064
3065 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3066 "Chip reset due to exchange starvation: %d/%d.\n",
3067 total_leaked, vha->hw->fw_xcb_count);
3068
3069 if (IS_P3P_TYPE(vha->hw))
3070 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3071 else
3072 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3073 qla2xxx_wake_dpc(vha);
3074 }
3075
3076 }
3077
3078 void qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3079 {
3080 struct qla_tgt *tgt = cmd->tgt;
3081 struct scsi_qla_host *vha = tgt->vha;
3082 struct se_cmd *se_cmd = &cmd->se_cmd;
3083
3084 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3085 "qla_target(%d): terminating exchange for aborted cmd=%p "
3086 "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3087 se_cmd->tag);
3088
3089 cmd->state = QLA_TGT_STATE_ABORTED;
3090 cmd->cmd_flags |= BIT_6;
3091
3092 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
3093 }
3094 EXPORT_SYMBOL(qlt_abort_cmd);
3095
3096 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3097 {
3098 struct qla_tgt_sess *sess = cmd->sess;
3099
3100 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3101 "%s: se_cmd[%p] ox_id %04x\n",
3102 __func__, &cmd->se_cmd,
3103 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3104
3105 BUG_ON(cmd->cmd_in_wq);
3106
3107 if (!cmd->q_full)
3108 qlt_decr_num_pend_cmds(cmd->vha);
3109
3110 BUG_ON(cmd->sg_mapped);
3111 cmd->jiffies_at_free = get_jiffies_64();
3112 if (unlikely(cmd->free_sg))
3113 kfree(cmd->sg);
3114
3115 if (!sess || !sess->se_sess) {
3116 WARN_ON(1);
3117 return;
3118 }
3119 cmd->jiffies_at_free = get_jiffies_64();
3120 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3121 }
3122 EXPORT_SYMBOL(qlt_free_cmd);
3123
3124 /* ha->hardware_lock supposed to be held on entry */
3125 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3126 struct qla_tgt_cmd *cmd, void *ctio)
3127 {
3128 struct qla_tgt_srr_ctio *sc;
3129 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3130 struct qla_tgt_srr_imm *imm;
3131
3132 tgt->ctio_srr_id++;
3133 cmd->cmd_flags |= BIT_15;
3134
3135 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3136 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3137
3138 if (!ctio) {
3139 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3140 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3141 vha->vp_idx);
3142 return -EINVAL;
3143 }
3144
3145 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3146 if (sc != NULL) {
3147 sc->cmd = cmd;
3148 /* IRQ is already OFF */
3149 spin_lock(&tgt->srr_lock);
3150 sc->srr_id = tgt->ctio_srr_id;
3151 list_add_tail(&sc->srr_list_entry,
3152 &tgt->srr_ctio_list);
3153 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3154 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3155 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3156 int found = 0;
3157 list_for_each_entry(imm, &tgt->srr_imm_list,
3158 srr_list_entry) {
3159 if (imm->srr_id == sc->srr_id) {
3160 found = 1;
3161 break;
3162 }
3163 }
3164 if (found) {
3165 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3166 "Scheduling srr work\n");
3167 schedule_work(&tgt->srr_work);
3168 } else {
3169 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3170 "qla_target(%d): imm_srr_id "
3171 "== ctio_srr_id (%d), but there is no "
3172 "corresponding SRR IMM, deleting CTIO "
3173 "SRR %p\n", vha->vp_idx,
3174 tgt->ctio_srr_id, sc);
3175 list_del(&sc->srr_list_entry);
3176 spin_unlock(&tgt->srr_lock);
3177
3178 kfree(sc);
3179 return -EINVAL;
3180 }
3181 }
3182 spin_unlock(&tgt->srr_lock);
3183 } else {
3184 struct qla_tgt_srr_imm *ti;
3185
3186 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3187 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3188 vha->vp_idx);
3189 spin_lock(&tgt->srr_lock);
3190 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3191 srr_list_entry) {
3192 if (imm->srr_id == tgt->ctio_srr_id) {
3193 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3194 "IMM SRR %p deleted (id %d)\n",
3195 imm, imm->srr_id);
3196 list_del(&imm->srr_list_entry);
3197 qlt_reject_free_srr_imm(vha, imm, 1);
3198 }
3199 }
3200 spin_unlock(&tgt->srr_lock);
3201
3202 return -ENOMEM;
3203 }
3204
3205 return 0;
3206 }
3207
3208 /*
3209 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3210 */
3211 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3212 struct qla_tgt_cmd *cmd, uint32_t status)
3213 {
3214 int term = 0;
3215
3216 if (ctio != NULL) {
3217 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3218 term = !(c->flags &
3219 __constant_cpu_to_le16(OF_TERM_EXCH));
3220 } else
3221 term = 1;
3222
3223 if (term)
3224 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3225
3226 return term;
3227 }
3228
3229 /* ha->hardware_lock supposed to be held on entry */
3230 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3231 uint32_t handle)
3232 {
3233 struct qla_hw_data *ha = vha->hw;
3234
3235 handle--;
3236 if (ha->tgt.cmds[handle] != NULL) {
3237 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3238 ha->tgt.cmds[handle] = NULL;
3239 return cmd;
3240 } else
3241 return NULL;
3242 }
3243
3244 /* ha->hardware_lock supposed to be held on entry */
3245 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3246 uint32_t handle, void *ctio)
3247 {
3248 struct qla_tgt_cmd *cmd = NULL;
3249
3250 /* Clear out internal marks */
3251 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3252 CTIO_INTERMEDIATE_HANDLE_MARK);
3253
3254 if (handle != QLA_TGT_NULL_HANDLE) {
3255 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3256 return NULL;
3257
3258 /* handle-1 is actually used */
3259 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3260 ql_dbg(ql_dbg_tgt, vha, 0xe052,
3261 "qla_target(%d): Wrong handle %x received\n",
3262 vha->vp_idx, handle);
3263 return NULL;
3264 }
3265 cmd = qlt_get_cmd(vha, handle);
3266 if (unlikely(cmd == NULL)) {
3267 ql_dbg(ql_dbg_tgt, vha, 0xe053,
3268 "qla_target(%d): Suspicious: unable to "
3269 "find the command with handle %x\n", vha->vp_idx,
3270 handle);
3271 return NULL;
3272 }
3273 } else if (ctio != NULL) {
3274 /* We can't get loop ID from CTIO7 */
3275 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3276 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3277 "support NULL handles\n", vha->vp_idx);
3278 return NULL;
3279 }
3280
3281 return cmd;
3282 }
3283
3284 /* hardware_lock should be held by caller. */
3285 static void
3286 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3287 {
3288 struct qla_hw_data *ha = vha->hw;
3289 uint32_t handle;
3290
3291 if (cmd->sg_mapped)
3292 qlt_unmap_sg(vha, cmd);
3293
3294 handle = qlt_make_handle(vha);
3295
3296 /* TODO: fix debug message type and ids. */
3297 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3298 ql_dbg(ql_dbg_io, vha, 0xff00,
3299 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3300 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3301 cmd->write_data_transferred = 0;
3302 cmd->state = QLA_TGT_STATE_DATA_IN;
3303
3304 ql_dbg(ql_dbg_io, vha, 0xff01,
3305 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3306
3307 ha->tgt.tgt_ops->handle_data(cmd);
3308 return;
3309 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3310 ql_dbg(ql_dbg_io, vha, 0xff02,
3311 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3312 } else {
3313 ql_dbg(ql_dbg_io, vha, 0xff03,
3314 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3315 cmd->state);
3316 dump_stack();
3317 }
3318
3319 cmd->cmd_flags |= BIT_17;
3320 ha->tgt.tgt_ops->free_cmd(cmd);
3321 }
3322
3323 void
3324 qlt_host_reset_handler(struct qla_hw_data *ha)
3325 {
3326 struct qla_tgt_cmd *cmd;
3327 unsigned long flags;
3328 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3329 scsi_qla_host_t *vha = NULL;
3330 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3331 uint32_t i;
3332
3333 if (!base_vha->hw->tgt.tgt_ops)
3334 return;
3335
3336 if (!tgt || qla_ini_mode_enabled(base_vha)) {
3337 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3338 "Target mode disabled\n");
3339 return;
3340 }
3341
3342 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3343 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3344 base_vha->dpc_flags);
3345
3346 spin_lock_irqsave(&ha->hardware_lock, flags);
3347 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3348 cmd = qlt_get_cmd(base_vha, i);
3349 if (!cmd)
3350 continue;
3351 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3352 vha = cmd->vha;
3353 qlt_abort_cmd_on_host_reset(vha, cmd);
3354 }
3355 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3356 }
3357
3358
3359 /*
3360 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3361 */
3362 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3363 uint32_t status, void *ctio)
3364 {
3365 struct qla_hw_data *ha = vha->hw;
3366 struct se_cmd *se_cmd;
3367 const struct target_core_fabric_ops *tfo;
3368 struct qla_tgt_cmd *cmd;
3369
3370 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3371 /* That could happen only in case of an error/reset/abort */
3372 if (status != CTIO_SUCCESS) {
3373 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3374 "Intermediate CTIO received"
3375 " (status %x)\n", status);
3376 }
3377 return;
3378 }
3379
3380 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3381 if (cmd == NULL)
3382 return;
3383
3384 se_cmd = &cmd->se_cmd;
3385 tfo = se_cmd->se_tfo;
3386 cmd->cmd_sent_to_fw = 0;
3387
3388 qlt_unmap_sg(vha, cmd);
3389
3390 if (unlikely(status != CTIO_SUCCESS)) {
3391 switch (status & 0xFFFF) {
3392 case CTIO_LIP_RESET:
3393 case CTIO_TARGET_RESET:
3394 case CTIO_ABORTED:
3395 /* driver request abort via Terminate exchange */
3396 case CTIO_TIMEOUT:
3397 case CTIO_INVALID_RX_ID:
3398 /* They are OK */
3399 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3400 "qla_target(%d): CTIO with "
3401 "status %#x received, state %x, se_cmd %p, "
3402 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3403 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3404 status, cmd->state, se_cmd);
3405 break;
3406
3407 case CTIO_PORT_LOGGED_OUT:
3408 case CTIO_PORT_UNAVAILABLE:
3409 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3410 "qla_target(%d): CTIO with PORT LOGGED "
3411 "OUT (29) or PORT UNAVAILABLE (28) status %x "
3412 "received (state %x, se_cmd %p)\n", vha->vp_idx,
3413 status, cmd->state, se_cmd);
3414 break;
3415
3416 case CTIO_SRR_RECEIVED:
3417 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3418 "qla_target(%d): CTIO with SRR_RECEIVED"
3419 " status %x received (state %x, se_cmd %p)\n",
3420 vha->vp_idx, status, cmd->state, se_cmd);
3421 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3422 break;
3423 else
3424 return;
3425
3426 case CTIO_DIF_ERROR: {
3427 struct ctio_crc_from_fw *crc =
3428 (struct ctio_crc_from_fw *)ctio;
3429 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3430 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3431 vha->vp_idx, status, cmd->state, se_cmd,
3432 *((u64 *)&crc->actual_dif[0]),
3433 *((u64 *)&crc->expected_dif[0]));
3434
3435 if (qlt_handle_dif_error(vha, cmd, ctio)) {
3436 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3437 /* scsi Write/xfer rdy complete */
3438 goto skip_term;
3439 } else {
3440 /* scsi read/xmit respond complete
3441 * call handle dif to send scsi status
3442 * rather than terminate exchange.
3443 */
3444 cmd->state = QLA_TGT_STATE_PROCESSED;
3445 ha->tgt.tgt_ops->handle_dif_err(cmd);
3446 return;
3447 }
3448 } else {
3449 /* Need to generate a SCSI good completion.
3450 * because FW did not send scsi status.
3451 */
3452 status = 0;
3453 goto skip_term;
3454 }
3455 break;
3456 }
3457 default:
3458 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3459 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3460 vha->vp_idx, status, cmd->state, se_cmd);
3461 break;
3462 }
3463
3464
3465 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3466 * cmd is already aborted/terminated, we don't
3467 * need to terminate again. The exchange is already
3468 * cleaned up/freed at FW level. Just cleanup at driver
3469 * level.
3470 */
3471 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3472 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3473 cmd->cmd_flags |= BIT_13;
3474 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3475 return;
3476 }
3477 }
3478 skip_term:
3479
3480 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3481 cmd->cmd_flags |= BIT_12;
3482 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3483 int rx_status = 0;
3484
3485 cmd->state = QLA_TGT_STATE_DATA_IN;
3486
3487 if (unlikely(status != CTIO_SUCCESS))
3488 rx_status = -EIO;
3489 else
3490 cmd->write_data_transferred = 1;
3491
3492 ha->tgt.tgt_ops->handle_data(cmd);
3493 return;
3494 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3495 cmd->cmd_flags |= BIT_18;
3496 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3497 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3498 } else {
3499 cmd->cmd_flags |= BIT_19;
3500 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3501 "qla_target(%d): A command in state (%d) should "
3502 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3503 }
3504
3505 if (unlikely(status != CTIO_SUCCESS) &&
3506 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3507 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3508 dump_stack();
3509 }
3510
3511 ha->tgt.tgt_ops->free_cmd(cmd);
3512 }
3513
3514 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3515 uint8_t task_codes)
3516 {
3517 int fcp_task_attr;
3518
3519 switch (task_codes) {
3520 case ATIO_SIMPLE_QUEUE:
3521 fcp_task_attr = TCM_SIMPLE_TAG;
3522 break;
3523 case ATIO_HEAD_OF_QUEUE:
3524 fcp_task_attr = TCM_HEAD_TAG;
3525 break;
3526 case ATIO_ORDERED_QUEUE:
3527 fcp_task_attr = TCM_ORDERED_TAG;
3528 break;
3529 case ATIO_ACA_QUEUE:
3530 fcp_task_attr = TCM_ACA_TAG;
3531 break;
3532 case ATIO_UNTAGGED:
3533 fcp_task_attr = TCM_SIMPLE_TAG;
3534 break;
3535 default:
3536 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3537 "qla_target: unknown task code %x, use ORDERED instead\n",
3538 task_codes);
3539 fcp_task_attr = TCM_ORDERED_TAG;
3540 break;
3541 }
3542
3543 return fcp_task_attr;
3544 }
3545
3546 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3547 uint8_t *);
3548 /*
3549 * Process context for I/O path into tcm_qla2xxx code
3550 */
3551 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3552 {
3553 scsi_qla_host_t *vha = cmd->vha;
3554 struct qla_hw_data *ha = vha->hw;
3555 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3556 struct qla_tgt_sess *sess = cmd->sess;
3557 struct atio_from_isp *atio = &cmd->atio;
3558 unsigned char *cdb;
3559 unsigned long flags;
3560 uint32_t data_length;
3561 int ret, fcp_task_attr, data_dir, bidi = 0;
3562
3563 cmd->cmd_in_wq = 0;
3564 cmd->cmd_flags |= BIT_1;
3565 if (tgt->tgt_stop)
3566 goto out_term;
3567
3568 if (cmd->state == QLA_TGT_STATE_ABORTED) {
3569 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3570 "cmd with tag %u is aborted\n",
3571 cmd->atio.u.isp24.exchange_addr);
3572 goto out_term;
3573 }
3574
3575 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3576 cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3577 cmd->unpacked_lun = scsilun_to_int(
3578 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3579
3580 if (atio->u.isp24.fcp_cmnd.rddata &&
3581 atio->u.isp24.fcp_cmnd.wrdata) {
3582 bidi = 1;
3583 data_dir = DMA_TO_DEVICE;
3584 } else if (atio->u.isp24.fcp_cmnd.rddata)
3585 data_dir = DMA_FROM_DEVICE;
3586 else if (atio->u.isp24.fcp_cmnd.wrdata)
3587 data_dir = DMA_TO_DEVICE;
3588 else
3589 data_dir = DMA_NONE;
3590
3591 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3592 atio->u.isp24.fcp_cmnd.task_attr);
3593 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3594 &atio->u.isp24.fcp_cmnd.add_cdb[
3595 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3596
3597 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3598 fcp_task_attr, data_dir, bidi);
3599 if (ret != 0)
3600 goto out_term;
3601 /*
3602 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3603 */
3604 spin_lock_irqsave(&ha->hardware_lock, flags);
3605 ha->tgt.tgt_ops->put_sess(sess);
3606 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3607 return;
3608
3609 out_term:
3610 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3611 /*
3612 * cmd has not sent to target yet, so pass NULL as the second
3613 * argument to qlt_send_term_exchange() and free the memory here.
3614 */
3615 cmd->cmd_flags |= BIT_2;
3616 spin_lock_irqsave(&ha->hardware_lock, flags);
3617 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3618
3619 qlt_decr_num_pend_cmds(vha);
3620 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3621 ha->tgt.tgt_ops->put_sess(sess);
3622 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3623 }
3624
3625 static void qlt_do_work(struct work_struct *work)
3626 {
3627 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3628 scsi_qla_host_t *vha = cmd->vha;
3629 unsigned long flags;
3630
3631 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3632 list_del(&cmd->cmd_list);
3633 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3634
3635 __qlt_do_work(cmd);
3636 }
3637
3638 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3639 struct qla_tgt_sess *sess,
3640 struct atio_from_isp *atio)
3641 {
3642 struct se_session *se_sess = sess->se_sess;
3643 struct qla_tgt_cmd *cmd;
3644 int tag;
3645
3646 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3647 if (tag < 0)
3648 return NULL;
3649
3650 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3651 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3652
3653 memcpy(&cmd->atio, atio, sizeof(*atio));
3654 cmd->state = QLA_TGT_STATE_NEW;
3655 cmd->tgt = vha->vha_tgt.qla_tgt;
3656 qlt_incr_num_pend_cmds(vha);
3657 cmd->vha = vha;
3658 cmd->se_cmd.map_tag = tag;
3659 cmd->sess = sess;
3660 cmd->loop_id = sess->loop_id;
3661 cmd->conf_compl_supported = sess->conf_compl_supported;
3662
3663 cmd->cmd_flags = 0;
3664 cmd->jiffies_at_alloc = get_jiffies_64();
3665
3666 cmd->reset_count = vha->hw->chip_reset;
3667
3668 return cmd;
3669 }
3670
3671 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3672 uint16_t);
3673
3674 static void qlt_create_sess_from_atio(struct work_struct *work)
3675 {
3676 struct qla_tgt_sess_op *op = container_of(work,
3677 struct qla_tgt_sess_op, work);
3678 scsi_qla_host_t *vha = op->vha;
3679 struct qla_hw_data *ha = vha->hw;
3680 struct qla_tgt_sess *sess;
3681 struct qla_tgt_cmd *cmd;
3682 unsigned long flags;
3683 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3684
3685 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3686 list_del(&op->cmd_list);
3687 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3688
3689 if (op->aborted) {
3690 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3691 "sess_op with tag %u is aborted\n",
3692 op->atio.u.isp24.exchange_addr);
3693 goto out_term;
3694 }
3695
3696 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3697 "qla_target(%d): Unable to find wwn login"
3698 " (s_id %x:%x:%x), trying to create it manually\n",
3699 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3700
3701 if (op->atio.u.raw.entry_count > 1) {
3702 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3703 "Dropping multy entry atio %p\n", &op->atio);
3704 goto out_term;
3705 }
3706
3707 mutex_lock(&vha->vha_tgt.tgt_mutex);
3708 sess = qlt_make_local_sess(vha, s_id);
3709 /* sess has an extra creation ref. */
3710 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3711
3712 if (!sess)
3713 goto out_term;
3714 /*
3715 * Now obtain a pre-allocated session tag using the original op->atio
3716 * packet header, and dispatch into __qlt_do_work() using the existing
3717 * process context.
3718 */
3719 cmd = qlt_get_tag(vha, sess, &op->atio);
3720 if (!cmd) {
3721 spin_lock_irqsave(&ha->hardware_lock, flags);
3722 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3723 ha->tgt.tgt_ops->put_sess(sess);
3724 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3725 kfree(op);
3726 return;
3727 }
3728 /*
3729 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3730 * the extra reference taken above by qlt_make_local_sess()
3731 */
3732 __qlt_do_work(cmd);
3733 kfree(op);
3734 return;
3735
3736 out_term:
3737 spin_lock_irqsave(&ha->hardware_lock, flags);
3738 qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3739 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3740 kfree(op);
3741
3742 }
3743
3744 /* ha->hardware_lock supposed to be held on entry */
3745 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3746 struct atio_from_isp *atio)
3747 {
3748 struct qla_hw_data *ha = vha->hw;
3749 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3750 struct qla_tgt_sess *sess;
3751 struct qla_tgt_cmd *cmd;
3752
3753 if (unlikely(tgt->tgt_stop)) {
3754 ql_dbg(ql_dbg_io, vha, 0x3061,
3755 "New command while device %p is shutting down\n", tgt);
3756 return -EFAULT;
3757 }
3758
3759 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3760 if (unlikely(!sess)) {
3761 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3762 GFP_ATOMIC);
3763 if (!op)
3764 return -ENOMEM;
3765
3766 memcpy(&op->atio, atio, sizeof(*atio));
3767 op->vha = vha;
3768
3769 spin_lock(&vha->cmd_list_lock);
3770 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3771 spin_unlock(&vha->cmd_list_lock);
3772
3773 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3774 queue_work(qla_tgt_wq, &op->work);
3775 return 0;
3776 }
3777
3778 /* Another WWN used to have our s_id. Our PLOGI scheduled its
3779 * session deletion, but it's still in sess_del_work wq */
3780 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3781 ql_dbg(ql_dbg_io, vha, 0x3061,
3782 "New command while old session %p is being deleted\n",
3783 sess);
3784 return -EFAULT;
3785 }
3786
3787 /*
3788 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3789 */
3790 kref_get(&sess->se_sess->sess_kref);
3791
3792 cmd = qlt_get_tag(vha, sess, atio);
3793 if (!cmd) {
3794 ql_dbg(ql_dbg_io, vha, 0x3062,
3795 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3796 ha->tgt.tgt_ops->put_sess(sess);
3797 return -ENOMEM;
3798 }
3799
3800 cmd->cmd_in_wq = 1;
3801 cmd->cmd_flags |= BIT_0;
3802
3803 spin_lock(&vha->cmd_list_lock);
3804 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
3805 spin_unlock(&vha->cmd_list_lock);
3806
3807 INIT_WORK(&cmd->work, qlt_do_work);
3808 queue_work(qla_tgt_wq, &cmd->work);
3809 return 0;
3810
3811 }
3812
3813 /* ha->hardware_lock supposed to be held on entry */
3814 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3815 int fn, void *iocb, int flags)
3816 {
3817 struct scsi_qla_host *vha = sess->vha;
3818 struct qla_hw_data *ha = vha->hw;
3819 struct qla_tgt_mgmt_cmd *mcmd;
3820 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3821 int res;
3822 uint8_t tmr_func;
3823
3824 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3825 if (!mcmd) {
3826 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3827 "qla_target(%d): Allocation of management "
3828 "command failed, some commands and their data could "
3829 "leak\n", vha->vp_idx);
3830 return -ENOMEM;
3831 }
3832 memset(mcmd, 0, sizeof(*mcmd));
3833 mcmd->sess = sess;
3834
3835 if (iocb) {
3836 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3837 sizeof(mcmd->orig_iocb.imm_ntfy));
3838 }
3839 mcmd->tmr_func = fn;
3840 mcmd->flags = flags;
3841 mcmd->reset_count = vha->hw->chip_reset;
3842
3843 switch (fn) {
3844 case QLA_TGT_CLEAR_ACA:
3845 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3846 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3847 tmr_func = TMR_CLEAR_ACA;
3848 break;
3849
3850 case QLA_TGT_TARGET_RESET:
3851 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3852 "qla_target(%d): TARGET_RESET received\n",
3853 sess->vha->vp_idx);
3854 tmr_func = TMR_TARGET_WARM_RESET;
3855 break;
3856
3857 case QLA_TGT_LUN_RESET:
3858 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3859 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3860 tmr_func = TMR_LUN_RESET;
3861 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
3862 break;
3863
3864 case QLA_TGT_CLEAR_TS:
3865 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3866 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3867 tmr_func = TMR_CLEAR_TASK_SET;
3868 break;
3869
3870 case QLA_TGT_ABORT_TS:
3871 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3872 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3873 tmr_func = TMR_ABORT_TASK_SET;
3874 break;
3875 #if 0
3876 case QLA_TGT_ABORT_ALL:
3877 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3878 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3879 sess->vha->vp_idx);
3880 tmr_func = 0;
3881 break;
3882
3883 case QLA_TGT_ABORT_ALL_SESS:
3884 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3885 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3886 sess->vha->vp_idx);
3887 tmr_func = 0;
3888 break;
3889
3890 case QLA_TGT_NEXUS_LOSS_SESS:
3891 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3892 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3893 sess->vha->vp_idx);
3894 tmr_func = 0;
3895 break;
3896
3897 case QLA_TGT_NEXUS_LOSS:
3898 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3899 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3900 tmr_func = 0;
3901 break;
3902 #endif
3903 default:
3904 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3905 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3906 sess->vha->vp_idx, fn);
3907 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3908 return -ENOSYS;
3909 }
3910
3911 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3912 if (res != 0) {
3913 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3914 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3915 sess->vha->vp_idx, res);
3916 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3917 return -EFAULT;
3918 }
3919
3920 return 0;
3921 }
3922
3923 /* ha->hardware_lock supposed to be held on entry */
3924 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3925 {
3926 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3927 struct qla_hw_data *ha = vha->hw;
3928 struct qla_tgt *tgt;
3929 struct qla_tgt_sess *sess;
3930 uint32_t lun, unpacked_lun;
3931 int lun_size, fn;
3932
3933 tgt = vha->vha_tgt.qla_tgt;
3934
3935 lun = a->u.isp24.fcp_cmnd.lun;
3936 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3937 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3938 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3939 a->u.isp24.fcp_hdr.s_id);
3940 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3941
3942 if (!sess) {
3943 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3944 "qla_target(%d): task mgmt fn 0x%x for "
3945 "non-existant session\n", vha->vp_idx, fn);
3946 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3947 sizeof(struct atio_from_isp));
3948 }
3949
3950 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
3951 return -EFAULT;
3952
3953 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3954 }
3955
3956 /* ha->hardware_lock supposed to be held on entry */
3957 static int __qlt_abort_task(struct scsi_qla_host *vha,
3958 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3959 {
3960 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3961 struct qla_hw_data *ha = vha->hw;
3962 struct qla_tgt_mgmt_cmd *mcmd;
3963 uint32_t lun, unpacked_lun;
3964 int rc;
3965
3966 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3967 if (mcmd == NULL) {
3968 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3969 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3970 vha->vp_idx, __func__);
3971 return -ENOMEM;
3972 }
3973 memset(mcmd, 0, sizeof(*mcmd));
3974
3975 mcmd->sess = sess;
3976 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3977 sizeof(mcmd->orig_iocb.imm_ntfy));
3978
3979 lun = a->u.isp24.fcp_cmnd.lun;
3980 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3981 mcmd->reset_count = vha->hw->chip_reset;
3982
3983 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3984 le16_to_cpu(iocb->u.isp2x.seq_id));
3985 if (rc != 0) {
3986 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3987 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3988 vha->vp_idx, rc);
3989 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3990 return -EFAULT;
3991 }
3992
3993 return 0;
3994 }
3995
3996 /* ha->hardware_lock supposed to be held on entry */
3997 static int qlt_abort_task(struct scsi_qla_host *vha,
3998 struct imm_ntfy_from_isp *iocb)
3999 {
4000 struct qla_hw_data *ha = vha->hw;
4001 struct qla_tgt_sess *sess;
4002 int loop_id;
4003
4004 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4005
4006 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4007 if (sess == NULL) {
4008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4009 "qla_target(%d): task abort for unexisting "
4010 "session\n", vha->vp_idx);
4011 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4012 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4013 }
4014
4015 return __qlt_abort_task(vha, iocb, sess);
4016 }
4017
4018 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4019 {
4020 if (fcport->tgt_session) {
4021 if (rc != MBS_COMMAND_COMPLETE) {
4022 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4023 "%s: se_sess %p / sess %p from"
4024 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4025 " LOGO failed: %#x\n",
4026 __func__,
4027 fcport->tgt_session->se_sess,
4028 fcport->tgt_session,
4029 fcport->port_name, fcport->loop_id,
4030 fcport->d_id.b.domain, fcport->d_id.b.area,
4031 fcport->d_id.b.al_pa, rc);
4032 }
4033
4034 fcport->tgt_session->logout_completed = 1;
4035 }
4036 }
4037
4038 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a,
4039 struct imm_ntfy_from_isp *b)
4040 {
4041 struct imm_ntfy_from_isp tmp;
4042 memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp));
4043 memcpy(a, b, sizeof(struct imm_ntfy_from_isp));
4044 memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp));
4045 }
4046
4047 /*
4048 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4049 *
4050 * Schedules sessions with matching port_id/loop_id but different wwn for
4051 * deletion. Returns existing session with matching wwn if present.
4052 * Null otherwise.
4053 */
4054 static struct qla_tgt_sess *
4055 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4056 port_id_t port_id, uint16_t loop_id)
4057 {
4058 struct qla_tgt_sess *sess = NULL, *other_sess;
4059 uint64_t other_wwn;
4060
4061 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4062
4063 other_wwn = wwn_to_u64(other_sess->port_name);
4064
4065 if (wwn == other_wwn) {
4066 WARN_ON(sess);
4067 sess = other_sess;
4068 continue;
4069 }
4070
4071 /* find other sess with nport_id collision */
4072 if (port_id.b24 == other_sess->s_id.b24) {
4073 if (loop_id != other_sess->loop_id) {
4074 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4075 "Invalidating sess %p loop_id %d wwn %llx.\n",
4076 other_sess, other_sess->loop_id, other_wwn);
4077
4078 /*
4079 * logout_on_delete is set by default, but another
4080 * session that has the same s_id/loop_id combo
4081 * might have cleared it when requested this session
4082 * deletion, so don't touch it
4083 */
4084 qlt_schedule_sess_for_deletion(other_sess, true);
4085 } else {
4086 /*
4087 * Another wwn used to have our s_id/loop_id
4088 * combo - kill the session, but don't log out
4089 */
4090 sess->logout_on_delete = 0;
4091 qlt_schedule_sess_for_deletion(other_sess,
4092 true);
4093 }
4094 continue;
4095 }
4096
4097 /* find other sess with nport handle collision */
4098 if (loop_id == other_sess->loop_id) {
4099 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4100 "Invalidating sess %p loop_id %d wwn %llx.\n",
4101 other_sess, other_sess->loop_id, other_wwn);
4102
4103 /* Same loop_id but different s_id
4104 * Ok to kill and logout */
4105 qlt_schedule_sess_for_deletion(other_sess, true);
4106 }
4107 }
4108
4109 return sess;
4110 }
4111
4112 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4113 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4114 {
4115 struct qla_tgt_sess_op *op;
4116 struct qla_tgt_cmd *cmd;
4117 uint32_t key;
4118 int count = 0;
4119
4120 key = (((u32)s_id->b.domain << 16) |
4121 ((u32)s_id->b.area << 8) |
4122 ((u32)s_id->b.al_pa));
4123
4124 spin_lock(&vha->cmd_list_lock);
4125 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4126 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4127 if (op_key == key) {
4128 op->aborted = true;
4129 count++;
4130 }
4131 }
4132 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4133 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4134 if (cmd_key == key) {
4135 cmd->state = QLA_TGT_STATE_ABORTED;
4136 count++;
4137 }
4138 }
4139 spin_unlock(&vha->cmd_list_lock);
4140
4141 return count;
4142 }
4143
4144 /*
4145 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4146 */
4147 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4148 struct imm_ntfy_from_isp *iocb)
4149 {
4150 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4151 struct qla_hw_data *ha = vha->hw;
4152 struct qla_tgt_sess *sess = NULL;
4153 uint64_t wwn;
4154 port_id_t port_id;
4155 uint16_t loop_id;
4156 uint16_t wd3_lo;
4157 int res = 0;
4158
4159 wwn = wwn_to_u64(iocb->u.isp24.port_name);
4160
4161 port_id.b.domain = iocb->u.isp24.port_id[2];
4162 port_id.b.area = iocb->u.isp24.port_id[1];
4163 port_id.b.al_pa = iocb->u.isp24.port_id[0];
4164 port_id.b.rsvd_1 = 0;
4165
4166 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4167
4168 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4169 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4170 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4171
4172 /* res = 1 means ack at the end of thread
4173 * res = 0 means ack async/later.
4174 */
4175 switch (iocb->u.isp24.status_subcode) {
4176 case ELS_PLOGI:
4177
4178 /* Mark all stale commands in qla_tgt_wq for deletion */
4179 abort_cmds_for_s_id(vha, &port_id);
4180
4181 if (wwn)
4182 sess = qlt_find_sess_invalidate_other(tgt, wwn,
4183 port_id, loop_id);
4184
4185 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) {
4186 res = 1;
4187 break;
4188 }
4189
4190 if (sess->plogi_ack_needed) {
4191 /*
4192 * Initiator sent another PLOGI before last PLOGI could
4193 * finish. Swap plogi iocbs and terminate old one
4194 * without acking, new one will get acked when session
4195 * deletion completes.
4196 */
4197 ql_log(ql_log_warn, sess->vha, 0xf094,
4198 "sess %p received double plogi.\n", sess);
4199
4200 qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb);
4201
4202 qlt_send_term_imm_notif(vha, iocb, 1);
4203
4204 res = 0;
4205 break;
4206 }
4207
4208 res = 0;
4209
4210 /*
4211 * Save immediate Notif IOCB for Ack when sess is done
4212 * and being deleted.
4213 */
4214 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb));
4215 sess->plogi_ack_needed = 1;
4216
4217 /*
4218 * Under normal circumstances we want to release nport handle
4219 * during LOGO process to avoid nport handle leaks inside FW.
4220 * The exception is when LOGO is done while another PLOGI with
4221 * the same nport handle is waiting as might be the case here.
4222 * Note: there is always a possibily of a race where session
4223 * deletion has already started for other reasons (e.g. ACL
4224 * removal) and now PLOGI arrives:
4225 * 1. if PLOGI arrived in FW after nport handle has been freed,
4226 * FW must have assigned this PLOGI a new/same handle and we
4227 * can proceed ACK'ing it as usual when session deletion
4228 * completes.
4229 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4230 * bit reached it, the handle has now been released. We'll
4231 * get an error when we ACK this PLOGI. Nothing will be sent
4232 * back to initiator. Initiator should eventually retry
4233 * PLOGI and situation will correct itself.
4234 */
4235 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4236 (sess->s_id.b24 == port_id.b24));
4237 qlt_schedule_sess_for_deletion(sess, true);
4238 break;
4239
4240 case ELS_PRLI:
4241 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4242
4243 if (wwn)
4244 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4245 loop_id);
4246
4247 if (sess != NULL) {
4248 if (sess->deleted) {
4249 /*
4250 * Impatient initiator sent PRLI before last
4251 * PLOGI could finish. Will force him to re-try,
4252 * while last one finishes.
4253 */
4254 ql_log(ql_log_warn, sess->vha, 0xf095,
4255 "sess %p PRLI received, before plogi ack.\n",
4256 sess);
4257 qlt_send_term_imm_notif(vha, iocb, 1);
4258 res = 0;
4259 break;
4260 }
4261
4262 /*
4263 * This shouldn't happen under normal circumstances,
4264 * since we have deleted the old session during PLOGI
4265 */
4266 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4267 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4268 sess->loop_id, sess, iocb->u.isp24.nport_handle);
4269
4270 sess->local = 0;
4271 sess->loop_id = loop_id;
4272 sess->s_id = port_id;
4273
4274 if (wd3_lo & BIT_7)
4275 sess->conf_compl_supported = 1;
4276
4277 }
4278 res = 1; /* send notify ack */
4279
4280 /* Make session global (not used in fabric mode) */
4281 if (ha->current_topology != ISP_CFG_F) {
4282 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4283 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4284 qla2xxx_wake_dpc(vha);
4285 } else {
4286 /* todo: else - create sess here. */
4287 res = 1; /* send notify ack */
4288 }
4289
4290 break;
4291
4292 case ELS_LOGO:
4293 case ELS_PRLO:
4294 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4295 break;
4296 case ELS_PDISC:
4297 case ELS_ADISC:
4298 {
4299 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4300 if (tgt->link_reinit_iocb_pending) {
4301 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4302 0, 0, 0, 0, 0, 0);
4303 tgt->link_reinit_iocb_pending = 0;
4304 }
4305 res = 1; /* send notify ack */
4306 break;
4307 }
4308
4309 case ELS_FLOGI: /* should never happen */
4310 default:
4311 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4312 "qla_target(%d): Unsupported ELS command %x "
4313 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4314 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4315 break;
4316 }
4317
4318 return res;
4319 }
4320
4321 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4322 {
4323 #if 1
4324 /*
4325 * FIXME: Reject non zero SRR relative offset until we can test
4326 * this code properly.
4327 */
4328 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4329 return -1;
4330 #else
4331 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4332 size_t first_offset = 0, rem_offset = offset, tmp = 0;
4333 int i, sg_srr_cnt, bufflen = 0;
4334
4335 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4336 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4337 "cmd->sg_cnt: %u, direction: %d\n",
4338 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4339
4340 if (!cmd->sg || !cmd->sg_cnt) {
4341 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4342 "Missing cmd->sg or zero cmd->sg_cnt in"
4343 " qla_tgt_set_data_offset\n");
4344 return -EINVAL;
4345 }
4346 /*
4347 * Walk the current cmd->sg list until we locate the new sg_srr_start
4348 */
4349 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4350 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4351 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4352 i, sg, sg_page(sg), sg->length, sg->offset);
4353
4354 if ((sg->length + tmp) > offset) {
4355 first_offset = rem_offset;
4356 sg_srr_start = sg;
4357 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4358 "Found matching sg[%d], using %p as sg_srr_start, "
4359 "and using first_offset: %zu\n", i, sg,
4360 first_offset);
4361 break;
4362 }
4363 tmp += sg->length;
4364 rem_offset -= sg->length;
4365 }
4366
4367 if (!sg_srr_start) {
4368 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4369 "Unable to locate sg_srr_start for offset: %u\n", offset);
4370 return -EINVAL;
4371 }
4372 sg_srr_cnt = (cmd->sg_cnt - i);
4373
4374 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4375 if (!sg_srr) {
4376 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4377 "Unable to allocate sgp\n");
4378 return -ENOMEM;
4379 }
4380 sg_init_table(sg_srr, sg_srr_cnt);
4381 sgp = &sg_srr[0];
4382 /*
4383 * Walk the remaining list for sg_srr_start, mapping to the newly
4384 * allocated sg_srr taking first_offset into account.
4385 */
4386 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4387 if (first_offset) {
4388 sg_set_page(sgp, sg_page(sg),
4389 (sg->length - first_offset), first_offset);
4390 first_offset = 0;
4391 } else {
4392 sg_set_page(sgp, sg_page(sg), sg->length, 0);
4393 }
4394 bufflen += sgp->length;
4395
4396 sgp = sg_next(sgp);
4397 if (!sgp)
4398 break;
4399 }
4400
4401 cmd->sg = sg_srr;
4402 cmd->sg_cnt = sg_srr_cnt;
4403 cmd->bufflen = bufflen;
4404 cmd->offset += offset;
4405 cmd->free_sg = 1;
4406
4407 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4408 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4409 cmd->sg_cnt);
4410 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4411 cmd->bufflen);
4412 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4413 cmd->offset);
4414
4415 if (cmd->sg_cnt < 0)
4416 BUG();
4417
4418 if (cmd->bufflen < 0)
4419 BUG();
4420
4421 return 0;
4422 #endif
4423 }
4424
4425 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4426 uint32_t srr_rel_offs, int *xmit_type)
4427 {
4428 int res = 0, rel_offs;
4429
4430 rel_offs = srr_rel_offs - cmd->offset;
4431 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4432 srr_rel_offs, rel_offs);
4433
4434 *xmit_type = QLA_TGT_XMIT_ALL;
4435
4436 if (rel_offs < 0) {
4437 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4438 "qla_target(%d): SRR rel_offs (%d) < 0",
4439 cmd->vha->vp_idx, rel_offs);
4440 res = -1;
4441 } else if (rel_offs == cmd->bufflen)
4442 *xmit_type = QLA_TGT_XMIT_STATUS;
4443 else if (rel_offs > 0)
4444 res = qlt_set_data_offset(cmd, rel_offs);
4445
4446 return res;
4447 }
4448
4449 /* No locks, thread context */
4450 static void qlt_handle_srr(struct scsi_qla_host *vha,
4451 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4452 {
4453 struct imm_ntfy_from_isp *ntfy =
4454 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4455 struct qla_hw_data *ha = vha->hw;
4456 struct qla_tgt_cmd *cmd = sctio->cmd;
4457 struct se_cmd *se_cmd = &cmd->se_cmd;
4458 unsigned long flags;
4459 int xmit_type = 0, resp = 0;
4460 uint32_t offset;
4461 uint16_t srr_ui;
4462
4463 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4464 srr_ui = ntfy->u.isp24.srr_ui;
4465
4466 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4467 cmd, srr_ui);
4468
4469 switch (srr_ui) {
4470 case SRR_IU_STATUS:
4471 spin_lock_irqsave(&ha->hardware_lock, flags);
4472 qlt_send_notify_ack(vha, ntfy,
4473 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4474 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4475 xmit_type = QLA_TGT_XMIT_STATUS;
4476 resp = 1;
4477 break;
4478 case SRR_IU_DATA_IN:
4479 if (!cmd->sg || !cmd->sg_cnt) {
4480 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4481 "Unable to process SRR_IU_DATA_IN due to"
4482 " missing cmd->sg, state: %d\n", cmd->state);
4483 dump_stack();
4484 goto out_reject;
4485 }
4486 if (se_cmd->scsi_status != 0) {
4487 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4488 "Rejecting SRR_IU_DATA_IN with non GOOD "
4489 "scsi_status\n");
4490 goto out_reject;
4491 }
4492 cmd->bufflen = se_cmd->data_length;
4493
4494 if (qlt_has_data(cmd)) {
4495 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4496 goto out_reject;
4497 spin_lock_irqsave(&ha->hardware_lock, flags);
4498 qlt_send_notify_ack(vha, ntfy,
4499 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4500 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4501 resp = 1;
4502 } else {
4503 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4504 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4505 vha->vp_idx, se_cmd->tag,
4506 cmd->se_cmd.scsi_status);
4507 goto out_reject;
4508 }
4509 break;
4510 case SRR_IU_DATA_OUT:
4511 if (!cmd->sg || !cmd->sg_cnt) {
4512 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4513 "Unable to process SRR_IU_DATA_OUT due to"
4514 " missing cmd->sg\n");
4515 dump_stack();
4516 goto out_reject;
4517 }
4518 if (se_cmd->scsi_status != 0) {
4519 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4520 "Rejecting SRR_IU_DATA_OUT"
4521 " with non GOOD scsi_status\n");
4522 goto out_reject;
4523 }
4524 cmd->bufflen = se_cmd->data_length;
4525
4526 if (qlt_has_data(cmd)) {
4527 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4528 goto out_reject;
4529 spin_lock_irqsave(&ha->hardware_lock, flags);
4530 qlt_send_notify_ack(vha, ntfy,
4531 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4532 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4533 if (xmit_type & QLA_TGT_XMIT_DATA) {
4534 cmd->cmd_flags |= BIT_8;
4535 qlt_rdy_to_xfer(cmd);
4536 }
4537 } else {
4538 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4539 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4540 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4541 goto out_reject;
4542 }
4543 break;
4544 default:
4545 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4546 "qla_target(%d): Unknown srr_ui value %x",
4547 vha->vp_idx, srr_ui);
4548 goto out_reject;
4549 }
4550
4551 /* Transmit response in case of status and data-in cases */
4552 if (resp) {
4553 cmd->cmd_flags |= BIT_7;
4554 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4555 }
4556
4557 return;
4558
4559 out_reject:
4560 spin_lock_irqsave(&ha->hardware_lock, flags);
4561 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4562 NOTIFY_ACK_SRR_FLAGS_REJECT,
4563 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4564 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4565 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4566 cmd->state = QLA_TGT_STATE_DATA_IN;
4567 dump_stack();
4568 } else {
4569 cmd->cmd_flags |= BIT_9;
4570 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
4571 }
4572 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4573 }
4574
4575 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4576 struct qla_tgt_srr_imm *imm, int ha_locked)
4577 {
4578 struct qla_hw_data *ha = vha->hw;
4579 unsigned long flags = 0;
4580
4581 if (!ha_locked)
4582 spin_lock_irqsave(&ha->hardware_lock, flags);
4583
4584 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4585 NOTIFY_ACK_SRR_FLAGS_REJECT,
4586 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4587 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4588
4589 if (!ha_locked)
4590 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4591
4592 kfree(imm);
4593 }
4594
4595 static void qlt_handle_srr_work(struct work_struct *work)
4596 {
4597 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4598 struct scsi_qla_host *vha = tgt->vha;
4599 struct qla_tgt_srr_ctio *sctio;
4600 unsigned long flags;
4601
4602 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4603 tgt);
4604
4605 restart:
4606 spin_lock_irqsave(&tgt->srr_lock, flags);
4607 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4608 struct qla_tgt_srr_imm *imm, *i, *ti;
4609 struct qla_tgt_cmd *cmd;
4610 struct se_cmd *se_cmd;
4611
4612 imm = NULL;
4613 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4614 srr_list_entry) {
4615 if (i->srr_id == sctio->srr_id) {
4616 list_del(&i->srr_list_entry);
4617 if (imm) {
4618 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4619 "qla_target(%d): There must be "
4620 "only one IMM SRR per CTIO SRR "
4621 "(IMM SRR %p, id %d, CTIO %p\n",
4622 vha->vp_idx, i, i->srr_id, sctio);
4623 qlt_reject_free_srr_imm(tgt->vha, i, 0);
4624 } else
4625 imm = i;
4626 }
4627 }
4628
4629 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4630 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4631 sctio->srr_id);
4632
4633 if (imm == NULL) {
4634 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4635 "Not found matching IMM for SRR CTIO (id %d)\n",
4636 sctio->srr_id);
4637 continue;
4638 } else
4639 list_del(&sctio->srr_list_entry);
4640
4641 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4642
4643 cmd = sctio->cmd;
4644 /*
4645 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4646 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4647 * logic..
4648 */
4649 cmd->offset = 0;
4650 if (cmd->free_sg) {
4651 kfree(cmd->sg);
4652 cmd->sg = NULL;
4653 cmd->free_sg = 0;
4654 }
4655 se_cmd = &cmd->se_cmd;
4656
4657 cmd->sg_cnt = se_cmd->t_data_nents;
4658 cmd->sg = se_cmd->t_data_sg;
4659
4660 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4661 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4662 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4663 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4664
4665 qlt_handle_srr(vha, sctio, imm);
4666
4667 kfree(imm);
4668 kfree(sctio);
4669 goto restart;
4670 }
4671 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4672 }
4673
4674 /* ha->hardware_lock supposed to be held on entry */
4675 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4676 struct imm_ntfy_from_isp *iocb)
4677 {
4678 struct qla_tgt_srr_imm *imm;
4679 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4680 struct qla_tgt_srr_ctio *sctio;
4681
4682 tgt->imm_srr_id++;
4683
4684 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4685 vha->vp_idx);
4686
4687 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4688 if (imm != NULL) {
4689 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4690
4691 /* IRQ is already OFF */
4692 spin_lock(&tgt->srr_lock);
4693 imm->srr_id = tgt->imm_srr_id;
4694 list_add_tail(&imm->srr_list_entry,
4695 &tgt->srr_imm_list);
4696 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4697 "IMM NTFY SRR %p added (id %d, ui %x)\n",
4698 imm, imm->srr_id, iocb->u.isp24.srr_ui);
4699 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4700 int found = 0;
4701 list_for_each_entry(sctio, &tgt->srr_ctio_list,
4702 srr_list_entry) {
4703 if (sctio->srr_id == imm->srr_id) {
4704 found = 1;
4705 break;
4706 }
4707 }
4708 if (found) {
4709 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4710 "Scheduling srr work\n");
4711 schedule_work(&tgt->srr_work);
4712 } else {
4713 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4714 "qla_target(%d): imm_srr_id "
4715 "== ctio_srr_id (%d), but there is no "
4716 "corresponding SRR CTIO, deleting IMM "
4717 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4718 imm);
4719 list_del(&imm->srr_list_entry);
4720
4721 kfree(imm);
4722
4723 spin_unlock(&tgt->srr_lock);
4724 goto out_reject;
4725 }
4726 }
4727 spin_unlock(&tgt->srr_lock);
4728 } else {
4729 struct qla_tgt_srr_ctio *ts;
4730
4731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4732 "qla_target(%d): Unable to allocate SRR IMM "
4733 "entry, SRR request will be rejected\n", vha->vp_idx);
4734
4735 /* IRQ is already OFF */
4736 spin_lock(&tgt->srr_lock);
4737 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4738 srr_list_entry) {
4739 if (sctio->srr_id == tgt->imm_srr_id) {
4740 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4741 "CTIO SRR %p deleted (id %d)\n",
4742 sctio, sctio->srr_id);
4743 list_del(&sctio->srr_list_entry);
4744 qlt_send_term_exchange(vha, sctio->cmd,
4745 &sctio->cmd->atio, 1);
4746 kfree(sctio);
4747 }
4748 }
4749 spin_unlock(&tgt->srr_lock);
4750 goto out_reject;
4751 }
4752
4753 return;
4754
4755 out_reject:
4756 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4757 NOTIFY_ACK_SRR_FLAGS_REJECT,
4758 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4759 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4760 }
4761
4762 /*
4763 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4764 */
4765 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4766 struct imm_ntfy_from_isp *iocb)
4767 {
4768 struct qla_hw_data *ha = vha->hw;
4769 uint32_t add_flags = 0;
4770 int send_notify_ack = 1;
4771 uint16_t status;
4772
4773 status = le16_to_cpu(iocb->u.isp2x.status);
4774 switch (status) {
4775 case IMM_NTFY_LIP_RESET:
4776 {
4777 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4778 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4779 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4780 iocb->u.isp24.status_subcode);
4781
4782 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4783 send_notify_ack = 0;
4784 break;
4785 }
4786
4787 case IMM_NTFY_LIP_LINK_REINIT:
4788 {
4789 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4790 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4791 "qla_target(%d): LINK REINIT (loop %#x, "
4792 "subcode %x)\n", vha->vp_idx,
4793 le16_to_cpu(iocb->u.isp24.nport_handle),
4794 iocb->u.isp24.status_subcode);
4795 if (tgt->link_reinit_iocb_pending) {
4796 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4797 0, 0, 0, 0, 0, 0);
4798 }
4799 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4800 tgt->link_reinit_iocb_pending = 1;
4801 /*
4802 * QLogic requires to wait after LINK REINIT for possible
4803 * PDISC or ADISC ELS commands
4804 */
4805 send_notify_ack = 0;
4806 break;
4807 }
4808
4809 case IMM_NTFY_PORT_LOGOUT:
4810 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4811 "qla_target(%d): Port logout (loop "
4812 "%#x, subcode %x)\n", vha->vp_idx,
4813 le16_to_cpu(iocb->u.isp24.nport_handle),
4814 iocb->u.isp24.status_subcode);
4815
4816 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4817 send_notify_ack = 0;
4818 /* The sessions will be cleared in the callback, if needed */
4819 break;
4820
4821 case IMM_NTFY_GLBL_TPRLO:
4822 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4823 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4824 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4825 send_notify_ack = 0;
4826 /* The sessions will be cleared in the callback, if needed */
4827 break;
4828
4829 case IMM_NTFY_PORT_CONFIG:
4830 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4831 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4832 status);
4833 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4834 send_notify_ack = 0;
4835 /* The sessions will be cleared in the callback, if needed */
4836 break;
4837
4838 case IMM_NTFY_GLBL_LOGO:
4839 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4840 "qla_target(%d): Link failure detected\n",
4841 vha->vp_idx);
4842 /* I_T nexus loss */
4843 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4844 send_notify_ack = 0;
4845 break;
4846
4847 case IMM_NTFY_IOCB_OVERFLOW:
4848 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4849 "qla_target(%d): Cannot provide requested "
4850 "capability (IOCB overflowed the immediate notify "
4851 "resource count)\n", vha->vp_idx);
4852 break;
4853
4854 case IMM_NTFY_ABORT_TASK:
4855 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4856 "qla_target(%d): Abort Task (S %08x I %#x -> "
4857 "L %#x)\n", vha->vp_idx,
4858 le16_to_cpu(iocb->u.isp2x.seq_id),
4859 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4860 le16_to_cpu(iocb->u.isp2x.lun));
4861 if (qlt_abort_task(vha, iocb) == 0)
4862 send_notify_ack = 0;
4863 break;
4864
4865 case IMM_NTFY_RESOURCE:
4866 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4867 "qla_target(%d): Out of resources, host %ld\n",
4868 vha->vp_idx, vha->host_no);
4869 break;
4870
4871 case IMM_NTFY_MSG_RX:
4872 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4873 "qla_target(%d): Immediate notify task %x\n",
4874 vha->vp_idx, iocb->u.isp2x.task_flags);
4875 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4876 send_notify_ack = 0;
4877 break;
4878
4879 case IMM_NTFY_ELS:
4880 if (qlt_24xx_handle_els(vha, iocb) == 0)
4881 send_notify_ack = 0;
4882 break;
4883
4884 case IMM_NTFY_SRR:
4885 qlt_prepare_srr_imm(vha, iocb);
4886 send_notify_ack = 0;
4887 break;
4888
4889 default:
4890 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4891 "qla_target(%d): Received unknown immediate "
4892 "notify status %x\n", vha->vp_idx, status);
4893 break;
4894 }
4895
4896 if (send_notify_ack)
4897 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4898 }
4899
4900 /*
4901 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4902 * This function sends busy to ISP 2xxx or 24xx.
4903 */
4904 static int __qlt_send_busy(struct scsi_qla_host *vha,
4905 struct atio_from_isp *atio, uint16_t status)
4906 {
4907 struct ctio7_to_24xx *ctio24;
4908 struct qla_hw_data *ha = vha->hw;
4909 request_t *pkt;
4910 struct qla_tgt_sess *sess = NULL;
4911
4912 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4913 atio->u.isp24.fcp_hdr.s_id);
4914 if (!sess) {
4915 qlt_send_term_exchange(vha, NULL, atio, 1);
4916 return 0;
4917 }
4918 /* Sending marker isn't necessary, since we called from ISR */
4919
4920 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4921 if (!pkt) {
4922 ql_dbg(ql_dbg_io, vha, 0x3063,
4923 "qla_target(%d): %s failed: unable to allocate "
4924 "request packet", vha->vp_idx, __func__);
4925 return -ENOMEM;
4926 }
4927
4928 pkt->entry_count = 1;
4929 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4930
4931 ctio24 = (struct ctio7_to_24xx *)pkt;
4932 ctio24->entry_type = CTIO_TYPE7;
4933 ctio24->nport_handle = sess->loop_id;
4934 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4935 ctio24->vp_index = vha->vp_idx;
4936 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4937 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4938 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4939 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4940 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4941 __constant_cpu_to_le16(
4942 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4943 CTIO7_FLAGS_DONT_RET_CTIO);
4944 /*
4945 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4946 * if the explicit conformation is used.
4947 */
4948 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4949 ctio24->u.status1.scsi_status = cpu_to_le16(status);
4950 /* Memory Barrier */
4951 wmb();
4952 qla2x00_start_iocbs(vha, vha->req);
4953 return 0;
4954 }
4955
4956 /*
4957 * This routine is used to allocate a command for either a QFull condition
4958 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4959 * out previously.
4960 */
4961 static void
4962 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4963 struct atio_from_isp *atio, uint16_t status, int qfull)
4964 {
4965 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4966 struct qla_hw_data *ha = vha->hw;
4967 struct qla_tgt_sess *sess;
4968 struct se_session *se_sess;
4969 struct qla_tgt_cmd *cmd;
4970 int tag;
4971
4972 if (unlikely(tgt->tgt_stop)) {
4973 ql_dbg(ql_dbg_io, vha, 0x300a,
4974 "New command while device %p is shutting down\n", tgt);
4975 return;
4976 }
4977
4978 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4979 vha->hw->tgt.num_qfull_cmds_dropped++;
4980 if (vha->hw->tgt.num_qfull_cmds_dropped >
4981 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4982 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4983 vha->hw->tgt.num_qfull_cmds_dropped;
4984
4985 ql_dbg(ql_dbg_io, vha, 0x3068,
4986 "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4987 vha->vp_idx, __func__,
4988 vha->hw->tgt.num_qfull_cmds_dropped);
4989
4990 qlt_chk_exch_leak_thresh_hold(vha);
4991 return;
4992 }
4993
4994 sess = ha->tgt.tgt_ops->find_sess_by_s_id
4995 (vha, atio->u.isp24.fcp_hdr.s_id);
4996 if (!sess)
4997 return;
4998
4999 se_sess = sess->se_sess;
5000
5001 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5002 if (tag < 0)
5003 return;
5004
5005 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5006 if (!cmd) {
5007 ql_dbg(ql_dbg_io, vha, 0x3009,
5008 "qla_target(%d): %s: Allocation of cmd failed\n",
5009 vha->vp_idx, __func__);
5010
5011 vha->hw->tgt.num_qfull_cmds_dropped++;
5012 if (vha->hw->tgt.num_qfull_cmds_dropped >
5013 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5014 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5015 vha->hw->tgt.num_qfull_cmds_dropped;
5016
5017 qlt_chk_exch_leak_thresh_hold(vha);
5018 return;
5019 }
5020
5021 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5022
5023 qlt_incr_num_pend_cmds(vha);
5024 INIT_LIST_HEAD(&cmd->cmd_list);
5025 memcpy(&cmd->atio, atio, sizeof(*atio));
5026
5027 cmd->tgt = vha->vha_tgt.qla_tgt;
5028 cmd->vha = vha;
5029 cmd->reset_count = vha->hw->chip_reset;
5030 cmd->q_full = 1;
5031
5032 if (qfull) {
5033 cmd->q_full = 1;
5034 /* NOTE: borrowing the state field to carry the status */
5035 cmd->state = status;
5036 } else
5037 cmd->term_exchg = 1;
5038
5039 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5040
5041 vha->hw->tgt.num_qfull_cmds_alloc++;
5042 if (vha->hw->tgt.num_qfull_cmds_alloc >
5043 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5044 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5045 vha->hw->tgt.num_qfull_cmds_alloc;
5046 }
5047
5048 int
5049 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5050 {
5051 struct qla_hw_data *ha = vha->hw;
5052 unsigned long flags;
5053 struct qla_tgt_cmd *cmd, *tcmd;
5054 struct list_head free_list;
5055 int rc = 0;
5056
5057 if (list_empty(&ha->tgt.q_full_list))
5058 return 0;
5059
5060 INIT_LIST_HEAD(&free_list);
5061
5062 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5063
5064 if (list_empty(&ha->tgt.q_full_list)) {
5065 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5066 return 0;
5067 }
5068
5069 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5070 if (cmd->q_full)
5071 /* cmd->state is a borrowed field to hold status */
5072 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5073 else if (cmd->term_exchg)
5074 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5075
5076 if (rc == -ENOMEM)
5077 break;
5078
5079 if (cmd->q_full)
5080 ql_dbg(ql_dbg_io, vha, 0x3006,
5081 "%s: busy sent for ox_id[%04x]\n", __func__,
5082 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5083 else if (cmd->term_exchg)
5084 ql_dbg(ql_dbg_io, vha, 0x3007,
5085 "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5086 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5087 else
5088 ql_dbg(ql_dbg_io, vha, 0x3008,
5089 "%s: Unexpected cmd in QFull list %p\n", __func__,
5090 cmd);
5091
5092 list_del(&cmd->cmd_list);
5093 list_add_tail(&cmd->cmd_list, &free_list);
5094
5095 /* piggy back on hardware_lock for protection */
5096 vha->hw->tgt.num_qfull_cmds_alloc--;
5097 }
5098 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5099
5100 cmd = NULL;
5101
5102 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5103 list_del(&cmd->cmd_list);
5104 /* This cmd was never sent to TCM. There is no need
5105 * to schedule free or call free_cmd
5106 */
5107 qlt_free_cmd(cmd);
5108 }
5109 return rc;
5110 }
5111
5112 static void
5113 qlt_send_busy(struct scsi_qla_host *vha,
5114 struct atio_from_isp *atio, uint16_t status)
5115 {
5116 int rc = 0;
5117
5118 rc = __qlt_send_busy(vha, atio, status);
5119 if (rc == -ENOMEM)
5120 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5121 }
5122
5123 static int
5124 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5125 struct atio_from_isp *atio)
5126 {
5127 struct qla_hw_data *ha = vha->hw;
5128 uint16_t status;
5129
5130 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5131 return 0;
5132
5133 status = temp_sam_status;
5134 qlt_send_busy(vha, atio, status);
5135 return 1;
5136 }
5137
5138 /* ha->hardware_lock supposed to be held on entry */
5139 /* called via callback from qla2xxx */
5140 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5141 struct atio_from_isp *atio)
5142 {
5143 struct qla_hw_data *ha = vha->hw;
5144 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5145 int rc;
5146
5147 if (unlikely(tgt == NULL)) {
5148 ql_dbg(ql_dbg_io, vha, 0x3064,
5149 "ATIO pkt, but no tgt (ha %p)", ha);
5150 return;
5151 }
5152 /*
5153 * In tgt_stop mode we also should allow all requests to pass.
5154 * Otherwise, some commands can stuck.
5155 */
5156
5157 tgt->irq_cmd_count++;
5158
5159 switch (atio->u.raw.entry_type) {
5160 case ATIO_TYPE7:
5161 if (unlikely(atio->u.isp24.exchange_addr ==
5162 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5163 ql_dbg(ql_dbg_io, vha, 0x3065,
5164 "qla_target(%d): ATIO_TYPE7 "
5165 "received with UNKNOWN exchange address, "
5166 "sending QUEUE_FULL\n", vha->vp_idx);
5167 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5168 break;
5169 }
5170
5171
5172
5173 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5174 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5175 if (rc != 0) {
5176 tgt->irq_cmd_count--;
5177 return;
5178 }
5179 rc = qlt_handle_cmd_for_atio(vha, atio);
5180 } else {
5181 rc = qlt_handle_task_mgmt(vha, atio);
5182 }
5183 if (unlikely(rc != 0)) {
5184 if (rc == -ESRCH) {
5185 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5186 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5187 #else
5188 qlt_send_term_exchange(vha, NULL, atio, 1);
5189 #endif
5190 } else {
5191 if (tgt->tgt_stop) {
5192 ql_dbg(ql_dbg_tgt, vha, 0xe059,
5193 "qla_target: Unable to send "
5194 "command to target for req, "
5195 "ignoring.\n");
5196 } else {
5197 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5198 "qla_target(%d): Unable to send "
5199 "command to target, sending BUSY "
5200 "status.\n", vha->vp_idx);
5201 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5202 }
5203 }
5204 }
5205 break;
5206
5207 case IMMED_NOTIFY_TYPE:
5208 {
5209 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5210 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5211 "qla_target(%d): Received ATIO packet %x "
5212 "with error status %x\n", vha->vp_idx,
5213 atio->u.raw.entry_type,
5214 atio->u.isp2x.entry_status);
5215 break;
5216 }
5217 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5218 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5219 break;
5220 }
5221
5222 default:
5223 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5224 "qla_target(%d): Received unknown ATIO atio "
5225 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5226 break;
5227 }
5228
5229 tgt->irq_cmd_count--;
5230 }
5231
5232 /* ha->hardware_lock supposed to be held on entry */
5233 /* called via callback from qla2xxx */
5234 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5235 {
5236 struct qla_hw_data *ha = vha->hw;
5237 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5238
5239 if (unlikely(tgt == NULL)) {
5240 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5241 "qla_target(%d): Response pkt %x received, but no "
5242 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5243 return;
5244 }
5245
5246 /*
5247 * In tgt_stop mode we also should allow all requests to pass.
5248 * Otherwise, some commands can stuck.
5249 */
5250
5251 tgt->irq_cmd_count++;
5252
5253 switch (pkt->entry_type) {
5254 case CTIO_CRC2:
5255 case CTIO_TYPE7:
5256 {
5257 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5258 qlt_do_ctio_completion(vha, entry->handle,
5259 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5260 entry);
5261 break;
5262 }
5263
5264 case ACCEPT_TGT_IO_TYPE:
5265 {
5266 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5267 int rc;
5268 if (atio->u.isp2x.status !=
5269 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
5270 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5271 "qla_target(%d): ATIO with error "
5272 "status %x received\n", vha->vp_idx,
5273 le16_to_cpu(atio->u.isp2x.status));
5274 break;
5275 }
5276
5277 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5278 if (rc != 0) {
5279 tgt->irq_cmd_count--;
5280 return;
5281 }
5282
5283 rc = qlt_handle_cmd_for_atio(vha, atio);
5284 if (unlikely(rc != 0)) {
5285 if (rc == -ESRCH) {
5286 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5287 qlt_send_busy(vha, atio, 0);
5288 #else
5289 qlt_send_term_exchange(vha, NULL, atio, 1);
5290 #endif
5291 } else {
5292 if (tgt->tgt_stop) {
5293 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5294 "qla_target: Unable to send "
5295 "command to target, sending TERM "
5296 "EXCHANGE for rsp\n");
5297 qlt_send_term_exchange(vha, NULL,
5298 atio, 1);
5299 } else {
5300 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5301 "qla_target(%d): Unable to send "
5302 "command to target, sending BUSY "
5303 "status\n", vha->vp_idx);
5304 qlt_send_busy(vha, atio, 0);
5305 }
5306 }
5307 }
5308 }
5309 break;
5310
5311 case CONTINUE_TGT_IO_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 CTIO_A64_TYPE:
5321 {
5322 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5323 qlt_do_ctio_completion(vha, entry->handle,
5324 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5325 entry);
5326 break;
5327 }
5328
5329 case IMMED_NOTIFY_TYPE:
5330 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5331 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5332 break;
5333
5334 case NOTIFY_ACK_TYPE:
5335 if (tgt->notify_ack_expected > 0) {
5336 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5337 ql_dbg(ql_dbg_tgt, vha, 0xe036,
5338 "NOTIFY_ACK seq %08x status %x\n",
5339 le16_to_cpu(entry->u.isp2x.seq_id),
5340 le16_to_cpu(entry->u.isp2x.status));
5341 tgt->notify_ack_expected--;
5342 if (entry->u.isp2x.status !=
5343 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5344 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5345 "qla_target(%d): NOTIFY_ACK "
5346 "failed %x\n", vha->vp_idx,
5347 le16_to_cpu(entry->u.isp2x.status));
5348 }
5349 } else {
5350 ql_dbg(ql_dbg_tgt, vha, 0xe062,
5351 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5352 vha->vp_idx);
5353 }
5354 break;
5355
5356 case ABTS_RECV_24XX:
5357 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5358 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5359 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5360 break;
5361
5362 case ABTS_RESP_24XX:
5363 if (tgt->abts_resp_expected > 0) {
5364 struct abts_resp_from_24xx_fw *entry =
5365 (struct abts_resp_from_24xx_fw *)pkt;
5366 ql_dbg(ql_dbg_tgt, vha, 0xe038,
5367 "ABTS_RESP_24XX: compl_status %x\n",
5368 entry->compl_status);
5369 tgt->abts_resp_expected--;
5370 if (le16_to_cpu(entry->compl_status) !=
5371 ABTS_RESP_COMPL_SUCCESS) {
5372 if ((entry->error_subcode1 == 0x1E) &&
5373 (entry->error_subcode2 == 0)) {
5374 /*
5375 * We've got a race here: aborted
5376 * exchange not terminated, i.e.
5377 * response for the aborted command was
5378 * sent between the abort request was
5379 * received and processed.
5380 * Unfortunately, the firmware has a
5381 * silly requirement that all aborted
5382 * exchanges must be explicitely
5383 * terminated, otherwise it refuses to
5384 * send responses for the abort
5385 * requests. So, we have to
5386 * (re)terminate the exchange and retry
5387 * the abort response.
5388 */
5389 qlt_24xx_retry_term_exchange(vha,
5390 entry);
5391 } else
5392 ql_dbg(ql_dbg_tgt, vha, 0xe063,
5393 "qla_target(%d): ABTS_RESP_24XX "
5394 "failed %x (subcode %x:%x)",
5395 vha->vp_idx, entry->compl_status,
5396 entry->error_subcode1,
5397 entry->error_subcode2);
5398 }
5399 } else {
5400 ql_dbg(ql_dbg_tgt, vha, 0xe064,
5401 "qla_target(%d): Unexpected ABTS_RESP_24XX "
5402 "received\n", vha->vp_idx);
5403 }
5404 break;
5405
5406 default:
5407 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5408 "qla_target(%d): Received unknown response pkt "
5409 "type %x\n", vha->vp_idx, pkt->entry_type);
5410 break;
5411 }
5412
5413 tgt->irq_cmd_count--;
5414 }
5415
5416 /*
5417 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5418 */
5419 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5420 uint16_t *mailbox)
5421 {
5422 struct qla_hw_data *ha = vha->hw;
5423 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5424 int login_code;
5425
5426 if (!ha->tgt.tgt_ops)
5427 return;
5428
5429 if (unlikely(tgt == NULL)) {
5430 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5431 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5432 return;
5433 }
5434
5435 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5436 IS_QLA2100(ha))
5437 return;
5438 /*
5439 * In tgt_stop mode we also should allow all requests to pass.
5440 * Otherwise, some commands can stuck.
5441 */
5442
5443 tgt->irq_cmd_count++;
5444
5445 switch (code) {
5446 case MBA_RESET: /* Reset */
5447 case MBA_SYSTEM_ERR: /* System Error */
5448 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
5449 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
5450 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5451 "qla_target(%d): System error async event %#x "
5452 "occurred", vha->vp_idx, code);
5453 break;
5454 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
5455 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5456 break;
5457
5458 case MBA_LOOP_UP:
5459 {
5460 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5461 "qla_target(%d): Async LOOP_UP occurred "
5462 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5463 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5464 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5465 if (tgt->link_reinit_iocb_pending) {
5466 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5467 0, 0, 0, 0, 0, 0);
5468 tgt->link_reinit_iocb_pending = 0;
5469 }
5470 break;
5471 }
5472
5473 case MBA_LIP_OCCURRED:
5474 case MBA_LOOP_DOWN:
5475 case MBA_LIP_RESET:
5476 case MBA_RSCN_UPDATE:
5477 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5478 "qla_target(%d): Async event %#x occurred "
5479 "(m[0]=%x, m[1]=%x, 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 break;
5483
5484 case MBA_PORT_UPDATE:
5485 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5486 "qla_target(%d): Port update async event %#x "
5487 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5488 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5489 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5490 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5491
5492 login_code = le16_to_cpu(mailbox[2]);
5493 if (login_code == 0x4)
5494 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5495 "Async MB 2: Got PLOGI Complete\n");
5496 else if (login_code == 0x7)
5497 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5498 "Async MB 2: Port Logged Out\n");
5499 break;
5500
5501 default:
5502 break;
5503 }
5504
5505 tgt->irq_cmd_count--;
5506 }
5507
5508 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5509 uint16_t loop_id)
5510 {
5511 fc_port_t *fcport;
5512 int rc;
5513
5514 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5515 if (!fcport) {
5516 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5517 "qla_target(%d): Allocation of tmp FC port failed",
5518 vha->vp_idx);
5519 return NULL;
5520 }
5521
5522 fcport->loop_id = loop_id;
5523
5524 rc = qla2x00_get_port_database(vha, fcport, 0);
5525 if (rc != QLA_SUCCESS) {
5526 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5527 "qla_target(%d): Failed to retrieve fcport "
5528 "information -- get_port_database() returned %x "
5529 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5530 kfree(fcport);
5531 return NULL;
5532 }
5533
5534 return fcport;
5535 }
5536
5537 /* Must be called under tgt_mutex */
5538 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5539 uint8_t *s_id)
5540 {
5541 struct qla_tgt_sess *sess = NULL;
5542 fc_port_t *fcport = NULL;
5543 int rc, global_resets;
5544 uint16_t loop_id = 0;
5545
5546 retry:
5547 global_resets =
5548 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5549
5550 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5551 if (rc != 0) {
5552 if ((s_id[0] == 0xFF) &&
5553 (s_id[1] == 0xFC)) {
5554 /*
5555 * This is Domain Controller, so it should be
5556 * OK to drop SCSI commands from it.
5557 */
5558 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5559 "Unable to find initiator with S_ID %x:%x:%x",
5560 s_id[0], s_id[1], s_id[2]);
5561 } else
5562 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
5563 "qla_target(%d): Unable to find "
5564 "initiator with S_ID %x:%x:%x",
5565 vha->vp_idx, s_id[0], s_id[1],
5566 s_id[2]);
5567 return NULL;
5568 }
5569
5570 fcport = qlt_get_port_database(vha, loop_id);
5571 if (!fcport)
5572 return NULL;
5573
5574 if (global_resets !=
5575 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5576 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5577 "qla_target(%d): global reset during session discovery "
5578 "(counter was %d, new %d), retrying", vha->vp_idx,
5579 global_resets,
5580 atomic_read(&vha->vha_tgt.
5581 qla_tgt->tgt_global_resets_count));
5582 goto retry;
5583 }
5584
5585 sess = qlt_create_sess(vha, fcport, true);
5586
5587 kfree(fcport);
5588 return sess;
5589 }
5590
5591 static void qlt_abort_work(struct qla_tgt *tgt,
5592 struct qla_tgt_sess_work_param *prm)
5593 {
5594 struct scsi_qla_host *vha = tgt->vha;
5595 struct qla_hw_data *ha = vha->hw;
5596 struct qla_tgt_sess *sess = NULL;
5597 unsigned long flags;
5598 uint32_t be_s_id;
5599 uint8_t s_id[3];
5600 int rc;
5601
5602 spin_lock_irqsave(&ha->hardware_lock, flags);
5603
5604 if (tgt->tgt_stop)
5605 goto out_term;
5606
5607 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5608 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5609 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5610
5611 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5612 (unsigned char *)&be_s_id);
5613 if (!sess) {
5614 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5615
5616 mutex_lock(&vha->vha_tgt.tgt_mutex);
5617 sess = qlt_make_local_sess(vha, s_id);
5618 /* sess has got an extra creation ref */
5619 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5620
5621 spin_lock_irqsave(&ha->hardware_lock, flags);
5622 if (!sess)
5623 goto out_term;
5624 } else {
5625 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5626 sess = NULL;
5627 goto out_term;
5628 }
5629
5630 kref_get(&sess->se_sess->sess_kref);
5631 }
5632
5633 if (tgt->tgt_stop)
5634 goto out_term;
5635
5636 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5637 if (rc != 0)
5638 goto out_term;
5639
5640 ha->tgt.tgt_ops->put_sess(sess);
5641 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5642 return;
5643
5644 out_term:
5645 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5646 if (sess)
5647 ha->tgt.tgt_ops->put_sess(sess);
5648 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5649 }
5650
5651 static void qlt_tmr_work(struct qla_tgt *tgt,
5652 struct qla_tgt_sess_work_param *prm)
5653 {
5654 struct atio_from_isp *a = &prm->tm_iocb2;
5655 struct scsi_qla_host *vha = tgt->vha;
5656 struct qla_hw_data *ha = vha->hw;
5657 struct qla_tgt_sess *sess = NULL;
5658 unsigned long flags;
5659 uint8_t *s_id = NULL; /* to hide compiler warnings */
5660 int rc;
5661 uint32_t lun, unpacked_lun;
5662 int lun_size, fn;
5663 void *iocb;
5664
5665 spin_lock_irqsave(&ha->hardware_lock, flags);
5666
5667 if (tgt->tgt_stop)
5668 goto out_term;
5669
5670 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5671 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5672 if (!sess) {
5673 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5674
5675 mutex_lock(&vha->vha_tgt.tgt_mutex);
5676 sess = qlt_make_local_sess(vha, s_id);
5677 /* sess has got an extra creation ref */
5678 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5679
5680 spin_lock_irqsave(&ha->hardware_lock, flags);
5681 if (!sess)
5682 goto out_term;
5683 } else {
5684 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5685 sess = NULL;
5686 goto out_term;
5687 }
5688
5689 kref_get(&sess->se_sess->sess_kref);
5690 }
5691
5692 iocb = a;
5693 lun = a->u.isp24.fcp_cmnd.lun;
5694 lun_size = sizeof(lun);
5695 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5696 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5697
5698 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5699 if (rc != 0)
5700 goto out_term;
5701
5702 ha->tgt.tgt_ops->put_sess(sess);
5703 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5704 return;
5705
5706 out_term:
5707 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5708 if (sess)
5709 ha->tgt.tgt_ops->put_sess(sess);
5710 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5711 }
5712
5713 static void qlt_sess_work_fn(struct work_struct *work)
5714 {
5715 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5716 struct scsi_qla_host *vha = tgt->vha;
5717 unsigned long flags;
5718
5719 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5720
5721 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5722 while (!list_empty(&tgt->sess_works_list)) {
5723 struct qla_tgt_sess_work_param *prm = list_entry(
5724 tgt->sess_works_list.next, typeof(*prm),
5725 sess_works_list_entry);
5726
5727 /*
5728 * This work can be scheduled on several CPUs at time, so we
5729 * must delete the entry to eliminate double processing
5730 */
5731 list_del(&prm->sess_works_list_entry);
5732
5733 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5734
5735 switch (prm->type) {
5736 case QLA_TGT_SESS_WORK_ABORT:
5737 qlt_abort_work(tgt, prm);
5738 break;
5739 case QLA_TGT_SESS_WORK_TM:
5740 qlt_tmr_work(tgt, prm);
5741 break;
5742 default:
5743 BUG_ON(1);
5744 break;
5745 }
5746
5747 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5748
5749 kfree(prm);
5750 }
5751 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5752 }
5753
5754 /* Must be called under tgt_host_action_mutex */
5755 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5756 {
5757 struct qla_tgt *tgt;
5758
5759 if (!QLA_TGT_MODE_ENABLED())
5760 return 0;
5761
5762 if (!IS_TGT_MODE_CAPABLE(ha)) {
5763 ql_log(ql_log_warn, base_vha, 0xe070,
5764 "This adapter does not support target mode.\n");
5765 return 0;
5766 }
5767
5768 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5769 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5770
5771 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5772
5773 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5774 if (!tgt) {
5775 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5776 "Unable to allocate struct qla_tgt\n");
5777 return -ENOMEM;
5778 }
5779
5780 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5781 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5782
5783 tgt->ha = ha;
5784 tgt->vha = base_vha;
5785 init_waitqueue_head(&tgt->waitQ);
5786 INIT_LIST_HEAD(&tgt->sess_list);
5787 INIT_LIST_HEAD(&tgt->del_sess_list);
5788 INIT_DELAYED_WORK(&tgt->sess_del_work,
5789 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5790 spin_lock_init(&tgt->sess_work_lock);
5791 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5792 INIT_LIST_HEAD(&tgt->sess_works_list);
5793 spin_lock_init(&tgt->srr_lock);
5794 INIT_LIST_HEAD(&tgt->srr_ctio_list);
5795 INIT_LIST_HEAD(&tgt->srr_imm_list);
5796 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5797 atomic_set(&tgt->tgt_global_resets_count, 0);
5798
5799 base_vha->vha_tgt.qla_tgt = tgt;
5800
5801 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5802 "qla_target(%d): using 64 Bit PCI addressing",
5803 base_vha->vp_idx);
5804 tgt->tgt_enable_64bit_addr = 1;
5805 /* 3 is reserved */
5806 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5807 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5808 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5809
5810 if (base_vha->fc_vport)
5811 return 0;
5812
5813 mutex_lock(&qla_tgt_mutex);
5814 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5815 mutex_unlock(&qla_tgt_mutex);
5816
5817 return 0;
5818 }
5819
5820 /* Must be called under tgt_host_action_mutex */
5821 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5822 {
5823 if (!vha->vha_tgt.qla_tgt)
5824 return 0;
5825
5826 if (vha->fc_vport) {
5827 qlt_release(vha->vha_tgt.qla_tgt);
5828 return 0;
5829 }
5830
5831 /* free left over qfull cmds */
5832 qlt_init_term_exchange(vha);
5833
5834 mutex_lock(&qla_tgt_mutex);
5835 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5836 mutex_unlock(&qla_tgt_mutex);
5837
5838 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5839 vha->host_no, ha);
5840 qlt_release(vha->vha_tgt.qla_tgt);
5841
5842 return 0;
5843 }
5844
5845 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5846 unsigned char *b)
5847 {
5848 int i;
5849
5850 pr_debug("qla2xxx HW vha->node_name: ");
5851 for (i = 0; i < WWN_SIZE; i++)
5852 pr_debug("%02x ", vha->node_name[i]);
5853 pr_debug("\n");
5854 pr_debug("qla2xxx HW vha->port_name: ");
5855 for (i = 0; i < WWN_SIZE; i++)
5856 pr_debug("%02x ", vha->port_name[i]);
5857 pr_debug("\n");
5858
5859 pr_debug("qla2xxx passed configfs WWPN: ");
5860 put_unaligned_be64(wwpn, b);
5861 for (i = 0; i < WWN_SIZE; i++)
5862 pr_debug("%02x ", b[i]);
5863 pr_debug("\n");
5864 }
5865
5866 /**
5867 * qla_tgt_lport_register - register lport with external module
5868 *
5869 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5870 * @wwpn: Passwd FC target WWPN
5871 * @callback: lport initialization callback for tcm_qla2xxx code
5872 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5873 */
5874 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5875 u64 npiv_wwpn, u64 npiv_wwnn,
5876 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5877 {
5878 struct qla_tgt *tgt;
5879 struct scsi_qla_host *vha;
5880 struct qla_hw_data *ha;
5881 struct Scsi_Host *host;
5882 unsigned long flags;
5883 int rc;
5884 u8 b[WWN_SIZE];
5885
5886 mutex_lock(&qla_tgt_mutex);
5887 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5888 vha = tgt->vha;
5889 ha = vha->hw;
5890
5891 host = vha->host;
5892 if (!host)
5893 continue;
5894
5895 if (!(host->hostt->supported_mode & MODE_TARGET))
5896 continue;
5897
5898 spin_lock_irqsave(&ha->hardware_lock, flags);
5899 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5900 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5901 host->host_no);
5902 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5903 continue;
5904 }
5905 if (tgt->tgt_stop) {
5906 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5907 host->host_no);
5908 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5909 continue;
5910 }
5911 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5912
5913 if (!scsi_host_get(host)) {
5914 ql_dbg(ql_dbg_tgt, vha, 0xe068,
5915 "Unable to scsi_host_get() for"
5916 " qla2xxx scsi_host\n");
5917 continue;
5918 }
5919 qlt_lport_dump(vha, phys_wwpn, b);
5920
5921 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5922 scsi_host_put(host);
5923 continue;
5924 }
5925 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5926 if (rc != 0)
5927 scsi_host_put(host);
5928
5929 mutex_unlock(&qla_tgt_mutex);
5930 return rc;
5931 }
5932 mutex_unlock(&qla_tgt_mutex);
5933
5934 return -ENODEV;
5935 }
5936 EXPORT_SYMBOL(qlt_lport_register);
5937
5938 /**
5939 * qla_tgt_lport_deregister - Degister lport
5940 *
5941 * @vha: Registered scsi_qla_host pointer
5942 */
5943 void qlt_lport_deregister(struct scsi_qla_host *vha)
5944 {
5945 struct qla_hw_data *ha = vha->hw;
5946 struct Scsi_Host *sh = vha->host;
5947 /*
5948 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5949 */
5950 vha->vha_tgt.target_lport_ptr = NULL;
5951 ha->tgt.tgt_ops = NULL;
5952 /*
5953 * Release the Scsi_Host reference for the underlying qla2xxx host
5954 */
5955 scsi_host_put(sh);
5956 }
5957 EXPORT_SYMBOL(qlt_lport_deregister);
5958
5959 /* Must be called under HW lock */
5960 static void qlt_set_mode(struct scsi_qla_host *vha)
5961 {
5962 struct qla_hw_data *ha = vha->hw;
5963
5964 switch (ql2x_ini_mode) {
5965 case QLA2XXX_INI_MODE_DISABLED:
5966 case QLA2XXX_INI_MODE_EXCLUSIVE:
5967 vha->host->active_mode = MODE_TARGET;
5968 break;
5969 case QLA2XXX_INI_MODE_ENABLED:
5970 vha->host->active_mode |= MODE_TARGET;
5971 break;
5972 default:
5973 break;
5974 }
5975
5976 if (ha->tgt.ini_mode_force_reverse)
5977 qla_reverse_ini_mode(vha);
5978 }
5979
5980 /* Must be called under HW lock */
5981 static void qlt_clear_mode(struct scsi_qla_host *vha)
5982 {
5983 struct qla_hw_data *ha = vha->hw;
5984
5985 switch (ql2x_ini_mode) {
5986 case QLA2XXX_INI_MODE_DISABLED:
5987 vha->host->active_mode = MODE_UNKNOWN;
5988 break;
5989 case QLA2XXX_INI_MODE_EXCLUSIVE:
5990 vha->host->active_mode = MODE_INITIATOR;
5991 break;
5992 case QLA2XXX_INI_MODE_ENABLED:
5993 vha->host->active_mode &= ~MODE_TARGET;
5994 break;
5995 default:
5996 break;
5997 }
5998
5999 if (ha->tgt.ini_mode_force_reverse)
6000 qla_reverse_ini_mode(vha);
6001 }
6002
6003 /*
6004 * qla_tgt_enable_vha - NO LOCK HELD
6005 *
6006 * host_reset, bring up w/ Target Mode Enabled
6007 */
6008 void
6009 qlt_enable_vha(struct scsi_qla_host *vha)
6010 {
6011 struct qla_hw_data *ha = vha->hw;
6012 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6013 unsigned long flags;
6014 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6015
6016 if (!tgt) {
6017 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6018 "Unable to locate qla_tgt pointer from"
6019 " struct qla_hw_data\n");
6020 dump_stack();
6021 return;
6022 }
6023
6024 spin_lock_irqsave(&ha->hardware_lock, flags);
6025 tgt->tgt_stopped = 0;
6026 qlt_set_mode(vha);
6027 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6028
6029 if (vha->vp_idx) {
6030 qla24xx_disable_vp(vha);
6031 qla24xx_enable_vp(vha);
6032 } else {
6033 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6034 qla2xxx_wake_dpc(base_vha);
6035 qla2x00_wait_for_hba_online(base_vha);
6036 }
6037 }
6038 EXPORT_SYMBOL(qlt_enable_vha);
6039
6040 /*
6041 * qla_tgt_disable_vha - NO LOCK HELD
6042 *
6043 * Disable Target Mode and reset the adapter
6044 */
6045 static void qlt_disable_vha(struct scsi_qla_host *vha)
6046 {
6047 struct qla_hw_data *ha = vha->hw;
6048 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6049 unsigned long flags;
6050
6051 if (!tgt) {
6052 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6053 "Unable to locate qla_tgt pointer from"
6054 " struct qla_hw_data\n");
6055 dump_stack();
6056 return;
6057 }
6058
6059 spin_lock_irqsave(&ha->hardware_lock, flags);
6060 qlt_clear_mode(vha);
6061 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6062
6063 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6064 qla2xxx_wake_dpc(vha);
6065 qla2x00_wait_for_hba_online(vha);
6066 }
6067
6068 /*
6069 * Called from qla_init.c:qla24xx_vport_create() contex to setup
6070 * the target mode specific struct scsi_qla_host and struct qla_hw_data
6071 * members.
6072 */
6073 void
6074 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6075 {
6076 if (!qla_tgt_mode_enabled(vha))
6077 return;
6078
6079 vha->vha_tgt.qla_tgt = NULL;
6080
6081 mutex_init(&vha->vha_tgt.tgt_mutex);
6082 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6083
6084 qlt_clear_mode(vha);
6085
6086 /*
6087 * NOTE: Currently the value is kept the same for <24xx and
6088 * >=24xx ISPs. If it is necessary to change it,
6089 * the check should be added for specific ISPs,
6090 * assigning the value appropriately.
6091 */
6092 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6093
6094 qlt_add_target(ha, vha);
6095 }
6096
6097 void
6098 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6099 {
6100 /*
6101 * FC-4 Feature bit 0 indicates target functionality to the name server.
6102 */
6103 if (qla_tgt_mode_enabled(vha)) {
6104 if (qla_ini_mode_enabled(vha))
6105 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6106 else
6107 ct_req->req.rff_id.fc4_feature = BIT_0;
6108 } else if (qla_ini_mode_enabled(vha)) {
6109 ct_req->req.rff_id.fc4_feature = BIT_1;
6110 }
6111 }
6112
6113 /*
6114 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6115 * @ha: HA context
6116 *
6117 * Beginning of ATIO ring has initialization control block already built
6118 * by nvram config routine.
6119 *
6120 * Returns 0 on success.
6121 */
6122 void
6123 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6124 {
6125 struct qla_hw_data *ha = vha->hw;
6126 uint16_t cnt;
6127 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6128
6129 if (!qla_tgt_mode_enabled(vha))
6130 return;
6131
6132 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6133 pkt->u.raw.signature = ATIO_PROCESSED;
6134 pkt++;
6135 }
6136
6137 }
6138
6139 /*
6140 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6141 * @ha: SCSI driver HA context
6142 */
6143 void
6144 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
6145 {
6146 struct qla_hw_data *ha = vha->hw;
6147 struct atio_from_isp *pkt;
6148 int cnt, i;
6149
6150 if (!vha->flags.online)
6151 return;
6152
6153 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6154 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6155 cnt = pkt->u.raw.entry_count;
6156
6157 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
6158
6159 for (i = 0; i < cnt; i++) {
6160 ha->tgt.atio_ring_index++;
6161 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6162 ha->tgt.atio_ring_index = 0;
6163 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6164 } else
6165 ha->tgt.atio_ring_ptr++;
6166
6167 pkt->u.raw.signature = ATIO_PROCESSED;
6168 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6169 }
6170 wmb();
6171 }
6172
6173 /* Adjust ring index */
6174 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6175 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6176 }
6177
6178 void
6179 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6180 {
6181 struct qla_hw_data *ha = vha->hw;
6182 if (!QLA_TGT_MODE_ENABLED())
6183 return;
6184
6185 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6186 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6187 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6188
6189 if (IS_ATIO_MSIX_CAPABLE(ha)) {
6190 struct qla_msix_entry *msix = &ha->msix_entries[2];
6191 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6192
6193 icb->msix_atio = cpu_to_le16(msix->entry);
6194 ql_dbg(ql_dbg_init, vha, 0xf072,
6195 "Registering ICB vector 0x%x for atio que.\n",
6196 msix->entry);
6197 }
6198 }
6199
6200 void
6201 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6202 {
6203 struct qla_hw_data *ha = vha->hw;
6204
6205 if (qla_tgt_mode_enabled(vha)) {
6206 if (!ha->tgt.saved_set) {
6207 /* We save only once */
6208 ha->tgt.saved_exchange_count = nv->exchange_count;
6209 ha->tgt.saved_firmware_options_1 =
6210 nv->firmware_options_1;
6211 ha->tgt.saved_firmware_options_2 =
6212 nv->firmware_options_2;
6213 ha->tgt.saved_firmware_options_3 =
6214 nv->firmware_options_3;
6215 ha->tgt.saved_set = 1;
6216 }
6217
6218 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
6219
6220 /* Enable target mode */
6221 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
6222
6223 /* Disable ini mode, if requested */
6224 if (!qla_ini_mode_enabled(vha))
6225 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
6226
6227 /* Disable Full Login after LIP */
6228 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
6229 /* Enable initial LIP */
6230 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
6231 if (ql2xtgt_tape_enable)
6232 /* Enable FC Tape support */
6233 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6234 else
6235 /* Disable FC Tape support */
6236 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6237
6238 /* Disable Full Login after LIP */
6239 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
6240 /* Enable target PRLI control */
6241 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
6242 } else {
6243 if (ha->tgt.saved_set) {
6244 nv->exchange_count = ha->tgt.saved_exchange_count;
6245 nv->firmware_options_1 =
6246 ha->tgt.saved_firmware_options_1;
6247 nv->firmware_options_2 =
6248 ha->tgt.saved_firmware_options_2;
6249 nv->firmware_options_3 =
6250 ha->tgt.saved_firmware_options_3;
6251 }
6252 return;
6253 }
6254
6255 /* out-of-order frames reassembly */
6256 nv->firmware_options_3 |= BIT_6|BIT_9;
6257
6258 if (ha->tgt.enable_class_2) {
6259 if (vha->flags.init_done)
6260 fc_host_supported_classes(vha->host) =
6261 FC_COS_CLASS2 | FC_COS_CLASS3;
6262
6263 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
6264 } else {
6265 if (vha->flags.init_done)
6266 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6267
6268 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
6269 }
6270 }
6271
6272 void
6273 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6274 struct init_cb_24xx *icb)
6275 {
6276 struct qla_hw_data *ha = vha->hw;
6277
6278 if (ha->tgt.node_name_set) {
6279 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6280 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
6281 }
6282 }
6283
6284 void
6285 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6286 {
6287 struct qla_hw_data *ha = vha->hw;
6288
6289 if (!QLA_TGT_MODE_ENABLED())
6290 return;
6291
6292 if (qla_tgt_mode_enabled(vha)) {
6293 if (!ha->tgt.saved_set) {
6294 /* We save only once */
6295 ha->tgt.saved_exchange_count = nv->exchange_count;
6296 ha->tgt.saved_firmware_options_1 =
6297 nv->firmware_options_1;
6298 ha->tgt.saved_firmware_options_2 =
6299 nv->firmware_options_2;
6300 ha->tgt.saved_firmware_options_3 =
6301 nv->firmware_options_3;
6302 ha->tgt.saved_set = 1;
6303 }
6304
6305 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
6306
6307 /* Enable target mode */
6308 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
6309
6310 /* Disable ini mode, if requested */
6311 if (!qla_ini_mode_enabled(vha))
6312 nv->firmware_options_1 |=
6313 __constant_cpu_to_le32(BIT_5);
6314
6315 /* Disable Full Login after LIP */
6316 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
6317 /* Enable initial LIP */
6318 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
6319 if (ql2xtgt_tape_enable)
6320 /* Enable FC tape support */
6321 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6322 else
6323 /* Disable FC tape support */
6324 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6325
6326 /* Disable Full Login after LIP */
6327 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
6328 /* Enable target PRLI control */
6329 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
6330 } else {
6331 if (ha->tgt.saved_set) {
6332 nv->exchange_count = ha->tgt.saved_exchange_count;
6333 nv->firmware_options_1 =
6334 ha->tgt.saved_firmware_options_1;
6335 nv->firmware_options_2 =
6336 ha->tgt.saved_firmware_options_2;
6337 nv->firmware_options_3 =
6338 ha->tgt.saved_firmware_options_3;
6339 }
6340 return;
6341 }
6342
6343 /* out-of-order frames reassembly */
6344 nv->firmware_options_3 |= BIT_6|BIT_9;
6345
6346 if (ha->tgt.enable_class_2) {
6347 if (vha->flags.init_done)
6348 fc_host_supported_classes(vha->host) =
6349 FC_COS_CLASS2 | FC_COS_CLASS3;
6350
6351 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
6352 } else {
6353 if (vha->flags.init_done)
6354 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6355
6356 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
6357 }
6358 }
6359
6360 void
6361 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6362 struct init_cb_81xx *icb)
6363 {
6364 struct qla_hw_data *ha = vha->hw;
6365
6366 if (!QLA_TGT_MODE_ENABLED())
6367 return;
6368
6369 if (ha->tgt.node_name_set) {
6370 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6371 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
6372 }
6373 }
6374
6375 void
6376 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6377 {
6378 if (!QLA_TGT_MODE_ENABLED())
6379 return;
6380
6381 ha->msix_count += 1; /* For ATIO Q */
6382 }
6383
6384 int
6385 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6386 struct sts_entry_24xx *pkt)
6387 {
6388 switch (pkt->entry_type) {
6389 case ABTS_RECV_24XX:
6390 case ABTS_RESP_24XX:
6391 case CTIO_TYPE7:
6392 case NOTIFY_ACK_TYPE:
6393 case CTIO_CRC2:
6394 return 1;
6395 default:
6396 return 0;
6397 }
6398 }
6399
6400 void
6401 qlt_modify_vp_config(struct scsi_qla_host *vha,
6402 struct vp_config_entry_24xx *vpmod)
6403 {
6404 if (qla_tgt_mode_enabled(vha))
6405 vpmod->options_idx1 &= ~BIT_5;
6406 /* Disable ini mode, if requested */
6407 if (!qla_ini_mode_enabled(vha))
6408 vpmod->options_idx1 &= ~BIT_4;
6409 }
6410
6411 void
6412 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6413 {
6414 if (!QLA_TGT_MODE_ENABLED())
6415 return;
6416
6417 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6418 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6419 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6420 } else {
6421 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6422 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6423 }
6424
6425 mutex_init(&base_vha->vha_tgt.tgt_mutex);
6426 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6427 qlt_clear_mode(base_vha);
6428 }
6429
6430 irqreturn_t
6431 qla83xx_msix_atio_q(int irq, void *dev_id)
6432 {
6433 struct rsp_que *rsp;
6434 scsi_qla_host_t *vha;
6435 struct qla_hw_data *ha;
6436 unsigned long flags;
6437
6438 rsp = (struct rsp_que *) dev_id;
6439 ha = rsp->hw;
6440 vha = pci_get_drvdata(ha->pdev);
6441
6442 spin_lock_irqsave(&ha->hardware_lock, flags);
6443
6444 qlt_24xx_process_atio_queue(vha);
6445 qla24xx_process_response_queue(vha, rsp);
6446
6447 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6448
6449 return IRQ_HANDLED;
6450 }
6451
6452 int
6453 qlt_mem_alloc(struct qla_hw_data *ha)
6454 {
6455 if (!QLA_TGT_MODE_ENABLED())
6456 return 0;
6457
6458 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6459 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6460 if (!ha->tgt.tgt_vp_map)
6461 return -ENOMEM;
6462
6463 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6464 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6465 &ha->tgt.atio_dma, GFP_KERNEL);
6466 if (!ha->tgt.atio_ring) {
6467 kfree(ha->tgt.tgt_vp_map);
6468 return -ENOMEM;
6469 }
6470 return 0;
6471 }
6472
6473 void
6474 qlt_mem_free(struct qla_hw_data *ha)
6475 {
6476 if (!QLA_TGT_MODE_ENABLED())
6477 return;
6478
6479 if (ha->tgt.atio_ring) {
6480 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6481 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6482 ha->tgt.atio_dma);
6483 }
6484 kfree(ha->tgt.tgt_vp_map);
6485 }
6486
6487 /* vport_slock to be held by the caller */
6488 void
6489 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6490 {
6491 if (!QLA_TGT_MODE_ENABLED())
6492 return;
6493
6494 switch (cmd) {
6495 case SET_VP_IDX:
6496 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6497 break;
6498 case SET_AL_PA:
6499 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6500 break;
6501 case RESET_VP_IDX:
6502 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6503 break;
6504 case RESET_AL_PA:
6505 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6506 break;
6507 }
6508 }
6509
6510 static int __init qlt_parse_ini_mode(void)
6511 {
6512 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6513 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6514 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6515 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6516 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6517 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6518 else
6519 return false;
6520
6521 return true;
6522 }
6523
6524 int __init qlt_init(void)
6525 {
6526 int ret;
6527
6528 if (!qlt_parse_ini_mode()) {
6529 ql_log(ql_log_fatal, NULL, 0xe06b,
6530 "qlt_parse_ini_mode() failed\n");
6531 return -EINVAL;
6532 }
6533
6534 if (!QLA_TGT_MODE_ENABLED())
6535 return 0;
6536
6537 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6538 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6539 qla_tgt_mgmt_cmd), 0, NULL);
6540 if (!qla_tgt_mgmt_cmd_cachep) {
6541 ql_log(ql_log_fatal, NULL, 0xe06d,
6542 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6543 return -ENOMEM;
6544 }
6545
6546 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6547 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6548 if (!qla_tgt_mgmt_cmd_mempool) {
6549 ql_log(ql_log_fatal, NULL, 0xe06e,
6550 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6551 ret = -ENOMEM;
6552 goto out_mgmt_cmd_cachep;
6553 }
6554
6555 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6556 if (!qla_tgt_wq) {
6557 ql_log(ql_log_fatal, NULL, 0xe06f,
6558 "alloc_workqueue for qla_tgt_wq failed\n");
6559 ret = -ENOMEM;
6560 goto out_cmd_mempool;
6561 }
6562 /*
6563 * Return 1 to signal that initiator-mode is being disabled
6564 */
6565 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6566
6567 out_cmd_mempool:
6568 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6569 out_mgmt_cmd_cachep:
6570 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6571 return ret;
6572 }
6573
6574 void qlt_exit(void)
6575 {
6576 if (!QLA_TGT_MODE_ENABLED())
6577 return;
6578
6579 destroy_workqueue(qla_tgt_wq);
6580 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6581 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6582 }