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 */
qlt_do_generation_tick(struct scsi_qla_host * vha,int * dest)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) */
qlt_find_sess_by_port_name(struct qla_tgt * tgt,const uint8_t * port_name)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!! */
qlt_issue_marker(struct scsi_qla_host * vha,int vha_locked)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
qlt_find_host_by_d_id(struct scsi_qla_host * vha,uint8_t * d_id)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
qlt_find_host_by_vp_idx(struct scsi_qla_host * vha,uint16_t vp_idx)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
qlt_incr_num_pend_cmds(struct scsi_qla_host * vha)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 }
qlt_decr_num_pend_cmds(struct scsi_qla_host * vha)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
qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host * vha,struct atio_from_isp * atio)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
qlt_response_pkt_all_vps(struct scsi_qla_host * vha,response_t * pkt)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
qlt_free_session_done(struct work_struct * work)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 u16 cnt = 0;
441
442 while (!ACCESS_ONCE(sess->logout_completed)) {
443 if (!traced) {
444 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
445 "%s: waiting for sess %p logout\n",
446 __func__, sess);
447 traced = true;
448 }
449 msleep(100);
450 cnt++;
451 if (cnt > 200)
452 break;
453 }
454
455 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
456 "%s: sess %p logout completed\n",
457 __func__, sess);
458 }
459
460 spin_lock_irqsave(&ha->hardware_lock, flags);
461
462 if (sess->plogi_ack_needed)
463 qlt_send_notify_ack(vha, &sess->tm_iocb,
464 0, 0, 0, 0, 0, 0);
465
466 list_del(&sess->sess_list_entry);
467
468 spin_unlock_irqrestore(&ha->hardware_lock, flags);
469
470 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
471 "Unregistration of sess %p finished\n", sess);
472
473 kfree(sess);
474 /*
475 * We need to protect against race, when tgt is freed before or
476 * inside wake_up()
477 */
478 tgt->sess_count--;
479 if (tgt->sess_count == 0)
480 wake_up_all(&tgt->waitQ);
481 }
482
483 /* ha->hardware_lock supposed to be held on entry */
qlt_unreg_sess(struct qla_tgt_sess * sess)484 void qlt_unreg_sess(struct qla_tgt_sess *sess)
485 {
486 struct scsi_qla_host *vha = sess->vha;
487
488 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
489
490 if (!list_empty(&sess->del_list_entry))
491 list_del_init(&sess->del_list_entry);
492 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
493
494 INIT_WORK(&sess->free_work, qlt_free_session_done);
495 schedule_work(&sess->free_work);
496 }
497 EXPORT_SYMBOL(qlt_unreg_sess);
498
499 /* ha->hardware_lock supposed to be held on entry */
qlt_reset(struct scsi_qla_host * vha,void * iocb,int mcmd)500 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
501 {
502 struct qla_hw_data *ha = vha->hw;
503 struct qla_tgt_sess *sess = NULL;
504 uint32_t unpacked_lun, lun = 0;
505 uint16_t loop_id;
506 int res = 0;
507 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
508 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
509
510 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
511 if (loop_id == 0xFFFF) {
512 /* Global event */
513 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
514 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
515 #if 0 /* FIXME: do we need to choose a session here? */
516 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
517 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
518 typeof(*sess), sess_list_entry);
519 switch (mcmd) {
520 case QLA_TGT_NEXUS_LOSS_SESS:
521 mcmd = QLA_TGT_NEXUS_LOSS;
522 break;
523 case QLA_TGT_ABORT_ALL_SESS:
524 mcmd = QLA_TGT_ABORT_ALL;
525 break;
526 case QLA_TGT_NEXUS_LOSS:
527 case QLA_TGT_ABORT_ALL:
528 break;
529 default:
530 ql_dbg(ql_dbg_tgt, vha, 0xe046,
531 "qla_target(%d): Not allowed "
532 "command %x in %s", vha->vp_idx,
533 mcmd, __func__);
534 sess = NULL;
535 break;
536 }
537 } else
538 sess = NULL;
539 #endif
540 } else {
541 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
542 }
543
544 ql_dbg(ql_dbg_tgt, vha, 0xe000,
545 "Using sess for qla_tgt_reset: %p\n", sess);
546 if (!sess) {
547 res = -ESRCH;
548 return res;
549 }
550
551 ql_dbg(ql_dbg_tgt, vha, 0xe047,
552 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
553 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
554 mcmd, loop_id);
555
556 lun = a->u.isp24.fcp_cmnd.lun;
557 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
558
559 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
560 iocb, QLA24XX_MGMT_SEND_NACK);
561 }
562
563 /* ha->hardware_lock supposed to be held on entry */
qlt_schedule_sess_for_deletion(struct qla_tgt_sess * sess,bool immediate)564 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
565 bool immediate)
566 {
567 struct qla_tgt *tgt = sess->tgt;
568 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
569
570 if (sess->deleted) {
571 /* Upgrade to unconditional deletion in case it was temporary */
572 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
573 list_del(&sess->del_list_entry);
574 else
575 return;
576 }
577
578 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
579 "Scheduling sess %p for deletion\n", sess);
580
581 if (immediate) {
582 dev_loss_tmo = 0;
583 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
584 list_add(&sess->del_list_entry, &tgt->del_sess_list);
585 } else {
586 sess->deleted = QLA_SESS_DELETION_PENDING;
587 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
588 }
589
590 sess->expires = jiffies + dev_loss_tmo * HZ;
591
592 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
593 "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
594 " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
595 sess->vha->vp_idx, sess->port_name, sess->loop_id,
596 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
597 dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
598 sess->generation);
599
600 if (immediate)
601 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
602 else
603 schedule_delayed_work(&tgt->sess_del_work,
604 sess->expires - jiffies);
605 }
606
607 /* ha->hardware_lock supposed to be held on entry */
qlt_clear_tgt_db(struct qla_tgt * tgt)608 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
609 {
610 struct qla_tgt_sess *sess;
611
612 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
613 qlt_schedule_sess_for_deletion(sess, true);
614
615 /* At this point tgt could be already dead */
616 }
617
qla24xx_get_loop_id(struct scsi_qla_host * vha,const uint8_t * s_id,uint16_t * loop_id)618 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
619 uint16_t *loop_id)
620 {
621 struct qla_hw_data *ha = vha->hw;
622 dma_addr_t gid_list_dma;
623 struct gid_list_info *gid_list;
624 char *id_iter;
625 int res, rc, i;
626 uint16_t entries;
627
628 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
629 &gid_list_dma, GFP_KERNEL);
630 if (!gid_list) {
631 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
632 "qla_target(%d): DMA Alloc failed of %u\n",
633 vha->vp_idx, qla2x00_gid_list_size(ha));
634 return -ENOMEM;
635 }
636
637 /* Get list of logged in devices */
638 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
639 if (rc != QLA_SUCCESS) {
640 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
641 "qla_target(%d): get_id_list() failed: %x\n",
642 vha->vp_idx, rc);
643 res = -1;
644 goto out_free_id_list;
645 }
646
647 id_iter = (char *)gid_list;
648 res = -1;
649 for (i = 0; i < entries; i++) {
650 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
651 if ((gid->al_pa == s_id[2]) &&
652 (gid->area == s_id[1]) &&
653 (gid->domain == s_id[0])) {
654 *loop_id = le16_to_cpu(gid->loop_id);
655 res = 0;
656 break;
657 }
658 id_iter += ha->gid_list_info_size;
659 }
660
661 out_free_id_list:
662 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
663 gid_list, gid_list_dma);
664 return res;
665 }
666
667 /* ha->hardware_lock supposed to be held on entry */
qlt_undelete_sess(struct qla_tgt_sess * sess)668 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
669 {
670 BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
671
672 list_del_init(&sess->del_list_entry);
673 sess->deleted = 0;
674 }
675
qlt_del_sess_work_fn(struct delayed_work * work)676 static void qlt_del_sess_work_fn(struct delayed_work *work)
677 {
678 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
679 sess_del_work);
680 struct scsi_qla_host *vha = tgt->vha;
681 struct qla_hw_data *ha = vha->hw;
682 struct qla_tgt_sess *sess;
683 unsigned long flags, elapsed;
684
685 spin_lock_irqsave(&ha->hardware_lock, flags);
686 while (!list_empty(&tgt->del_sess_list)) {
687 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
688 del_list_entry);
689 elapsed = jiffies;
690 if (time_after_eq(elapsed, sess->expires)) {
691 /* No turning back */
692 list_del_init(&sess->del_list_entry);
693 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
694
695 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
696 "Timeout: sess %p about to be deleted\n",
697 sess);
698 ha->tgt.tgt_ops->shutdown_sess(sess);
699 ha->tgt.tgt_ops->put_sess(sess);
700 } else {
701 schedule_delayed_work(&tgt->sess_del_work,
702 sess->expires - elapsed);
703 break;
704 }
705 }
706 spin_unlock_irqrestore(&ha->hardware_lock, flags);
707 }
708
709 /*
710 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
711 * Caller must put it.
712 */
qlt_create_sess(struct scsi_qla_host * vha,fc_port_t * fcport,bool local)713 static struct qla_tgt_sess *qlt_create_sess(
714 struct scsi_qla_host *vha,
715 fc_port_t *fcport,
716 bool local)
717 {
718 struct qla_hw_data *ha = vha->hw;
719 struct qla_tgt_sess *sess;
720 unsigned long flags;
721 unsigned char be_sid[3];
722
723 /* Check to avoid double sessions */
724 spin_lock_irqsave(&ha->hardware_lock, flags);
725 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
726 sess_list_entry) {
727 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
728 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
729 "Double sess %p found (s_id %x:%x:%x, "
730 "loop_id %d), updating to d_id %x:%x:%x, "
731 "loop_id %d", sess, sess->s_id.b.domain,
732 sess->s_id.b.al_pa, sess->s_id.b.area,
733 sess->loop_id, fcport->d_id.b.domain,
734 fcport->d_id.b.al_pa, fcport->d_id.b.area,
735 fcport->loop_id);
736
737 /* Cannot undelete at this point */
738 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
739 spin_unlock_irqrestore(&ha->hardware_lock,
740 flags);
741 return NULL;
742 }
743
744 if (sess->deleted)
745 qlt_undelete_sess(sess);
746
747 kref_get(&sess->se_sess->sess_kref);
748 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
749 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
750
751 if (sess->local && !local)
752 sess->local = 0;
753
754 qlt_do_generation_tick(vha, &sess->generation);
755
756 spin_unlock_irqrestore(&ha->hardware_lock, flags);
757
758 return sess;
759 }
760 }
761 spin_unlock_irqrestore(&ha->hardware_lock, flags);
762
763 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
764 if (!sess) {
765 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
766 "qla_target(%u): session allocation failed, all commands "
767 "from port %8phC will be refused", vha->vp_idx,
768 fcport->port_name);
769
770 return NULL;
771 }
772 sess->tgt = vha->vha_tgt.qla_tgt;
773 sess->vha = vha;
774 sess->s_id = fcport->d_id;
775 sess->loop_id = fcport->loop_id;
776 sess->local = local;
777 INIT_LIST_HEAD(&sess->del_list_entry);
778
779 /* Under normal circumstances we want to logout from firmware when
780 * session eventually ends and release corresponding nport handle.
781 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
782 * code will adjust these flags as necessary. */
783 sess->logout_on_delete = 1;
784 sess->keep_nport_handle = 0;
785
786 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
787 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
788 sess, vha->vha_tgt.qla_tgt);
789
790 be_sid[0] = sess->s_id.b.domain;
791 be_sid[1] = sess->s_id.b.area;
792 be_sid[2] = sess->s_id.b.al_pa;
793 /*
794 * Determine if this fc_port->port_name is allowed to access
795 * target mode using explict NodeACLs+MappedLUNs, or using
796 * TPG demo mode. If this is successful a target mode FC nexus
797 * is created.
798 */
799 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
800 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
801 kfree(sess);
802 return NULL;
803 }
804 /*
805 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
806 * access across ->hardware_lock reaquire.
807 */
808 kref_get(&sess->se_sess->sess_kref);
809
810 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
811 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
812 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
813
814 spin_lock_irqsave(&ha->hardware_lock, flags);
815 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
816 vha->vha_tgt.qla_tgt->sess_count++;
817 qlt_do_generation_tick(vha, &sess->generation);
818 spin_unlock_irqrestore(&ha->hardware_lock, flags);
819
820 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
821 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
822 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
823 vha->vp_idx, local ? "local " : "", fcport->port_name,
824 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
825 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
826
827 return sess;
828 }
829
830 /*
831 * Called from qla2x00_reg_remote_port()
832 */
qlt_fc_port_added(struct scsi_qla_host * vha,fc_port_t * fcport)833 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
834 {
835 struct qla_hw_data *ha = vha->hw;
836 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
837 struct qla_tgt_sess *sess;
838 unsigned long flags;
839
840 if (!vha->hw->tgt.tgt_ops)
841 return;
842
843 if (!tgt || (fcport->port_type != FCT_INITIATOR))
844 return;
845
846 if (qla_ini_mode_enabled(vha))
847 return;
848
849 spin_lock_irqsave(&ha->hardware_lock, flags);
850 if (tgt->tgt_stop) {
851 spin_unlock_irqrestore(&ha->hardware_lock, flags);
852 return;
853 }
854 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
855 if (!sess) {
856 spin_unlock_irqrestore(&ha->hardware_lock, flags);
857
858 mutex_lock(&vha->vha_tgt.tgt_mutex);
859 sess = qlt_create_sess(vha, fcport, false);
860 mutex_unlock(&vha->vha_tgt.tgt_mutex);
861
862 spin_lock_irqsave(&ha->hardware_lock, flags);
863 } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
864 /* Point of no return */
865 spin_unlock_irqrestore(&ha->hardware_lock, flags);
866 return;
867 } else {
868 kref_get(&sess->se_sess->sess_kref);
869
870 if (sess->deleted) {
871 qlt_undelete_sess(sess);
872
873 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
874 "qla_target(%u): %ssession for port %8phC "
875 "(loop ID %d) reappeared\n", vha->vp_idx,
876 sess->local ? "local " : "", sess->port_name,
877 sess->loop_id);
878
879 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
880 "Reappeared sess %p\n", sess);
881 }
882 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
883 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
884 }
885
886 if (sess && sess->local) {
887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
888 "qla_target(%u): local session for "
889 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
890 fcport->port_name, sess->loop_id);
891 sess->local = 0;
892 }
893 ha->tgt.tgt_ops->put_sess(sess);
894 spin_unlock_irqrestore(&ha->hardware_lock, flags);
895 }
896
897 /*
898 * max_gen - specifies maximum session generation
899 * at which this deletion requestion is still valid
900 */
901 void
qlt_fc_port_deleted(struct scsi_qla_host * vha,fc_port_t * fcport,int max_gen)902 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
903 {
904 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
905 struct qla_tgt_sess *sess;
906
907 if (!vha->hw->tgt.tgt_ops)
908 return;
909
910 if (!tgt)
911 return;
912
913 if (tgt->tgt_stop) {
914 return;
915 }
916 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
917 if (!sess) {
918 return;
919 }
920
921 if (max_gen - sess->generation < 0) {
922 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
923 "Ignoring stale deletion request for se_sess %p / sess %p"
924 " for port %8phC, req_gen %d, sess_gen %d\n",
925 sess->se_sess, sess, sess->port_name, max_gen,
926 sess->generation);
927 return;
928 }
929
930 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
931
932 sess->local = 1;
933 qlt_schedule_sess_for_deletion(sess, false);
934 }
935
test_tgt_sess_count(struct qla_tgt * tgt)936 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
937 {
938 struct qla_hw_data *ha = tgt->ha;
939 unsigned long flags;
940 int res;
941 /*
942 * We need to protect against race, when tgt is freed before or
943 * inside wake_up()
944 */
945 spin_lock_irqsave(&ha->hardware_lock, flags);
946 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
947 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
948 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
949 res = (tgt->sess_count == 0);
950 spin_unlock_irqrestore(&ha->hardware_lock, flags);
951
952 return res;
953 }
954
955 /* Called by tcm_qla2xxx configfs code */
qlt_stop_phase1(struct qla_tgt * tgt)956 int qlt_stop_phase1(struct qla_tgt *tgt)
957 {
958 struct scsi_qla_host *vha = tgt->vha;
959 struct qla_hw_data *ha = tgt->ha;
960 unsigned long flags;
961
962 mutex_lock(&qla_tgt_mutex);
963 if (!vha->fc_vport) {
964 struct Scsi_Host *sh = vha->host;
965 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
966 bool npiv_vports;
967
968 spin_lock_irqsave(sh->host_lock, flags);
969 npiv_vports = (fc_host->npiv_vports_inuse);
970 spin_unlock_irqrestore(sh->host_lock, flags);
971
972 if (npiv_vports) {
973 mutex_unlock(&qla_tgt_mutex);
974 return -EPERM;
975 }
976 }
977 if (tgt->tgt_stop || tgt->tgt_stopped) {
978 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
979 "Already in tgt->tgt_stop or tgt_stopped state\n");
980 mutex_unlock(&qla_tgt_mutex);
981 return -EPERM;
982 }
983
984 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
985 vha->host_no, vha);
986 /*
987 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
988 * Lock is needed, because we still can get an incoming packet.
989 */
990 mutex_lock(&vha->vha_tgt.tgt_mutex);
991 spin_lock_irqsave(&ha->hardware_lock, flags);
992 tgt->tgt_stop = 1;
993 qlt_clear_tgt_db(tgt);
994 spin_unlock_irqrestore(&ha->hardware_lock, flags);
995 mutex_unlock(&vha->vha_tgt.tgt_mutex);
996 mutex_unlock(&qla_tgt_mutex);
997
998 flush_delayed_work(&tgt->sess_del_work);
999
1000 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1001 "Waiting for sess works (tgt %p)", tgt);
1002 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1003 while (!list_empty(&tgt->sess_works_list)) {
1004 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1005 flush_scheduled_work();
1006 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1007 }
1008 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1009
1010 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1011 "Waiting for tgt %p: list_empty(sess_list)=%d "
1012 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1013 tgt->sess_count);
1014
1015 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1016
1017 /* Big hammer */
1018 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1019 qlt_disable_vha(vha);
1020
1021 /* Wait for sessions to clear out (just in case) */
1022 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1023 return 0;
1024 }
1025 EXPORT_SYMBOL(qlt_stop_phase1);
1026
1027 /* Called by tcm_qla2xxx configfs code */
qlt_stop_phase2(struct qla_tgt * tgt)1028 void qlt_stop_phase2(struct qla_tgt *tgt)
1029 {
1030 struct qla_hw_data *ha = tgt->ha;
1031 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1032 unsigned long flags;
1033
1034 if (tgt->tgt_stopped) {
1035 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1036 "Already in tgt->tgt_stopped state\n");
1037 dump_stack();
1038 return;
1039 }
1040
1041 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1042 "Waiting for %d IRQ commands to complete (tgt %p)",
1043 tgt->irq_cmd_count, tgt);
1044
1045 mutex_lock(&tgt->ha->optrom_mutex);
1046 mutex_lock(&vha->vha_tgt.tgt_mutex);
1047 spin_lock_irqsave(&ha->hardware_lock, flags);
1048 while (tgt->irq_cmd_count != 0) {
1049 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1050 udelay(2);
1051 spin_lock_irqsave(&ha->hardware_lock, flags);
1052 }
1053 tgt->tgt_stop = 0;
1054 tgt->tgt_stopped = 1;
1055 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1056 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1057 mutex_unlock(&tgt->ha->optrom_mutex);
1058
1059 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1060 tgt);
1061 }
1062 EXPORT_SYMBOL(qlt_stop_phase2);
1063
1064 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
qlt_release(struct qla_tgt * tgt)1065 static void qlt_release(struct qla_tgt *tgt)
1066 {
1067 scsi_qla_host_t *vha = tgt->vha;
1068
1069 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1070 qlt_stop_phase2(tgt);
1071
1072 vha->vha_tgt.qla_tgt = NULL;
1073
1074 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1075 "Release of tgt %p finished\n", tgt);
1076
1077 kfree(tgt);
1078 }
1079
1080 /* ha->hardware_lock supposed to be held on entry */
qlt_sched_sess_work(struct qla_tgt * tgt,int type,const void * param,unsigned int param_size)1081 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1082 const void *param, unsigned int param_size)
1083 {
1084 struct qla_tgt_sess_work_param *prm;
1085 unsigned long flags;
1086
1087 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1088 if (!prm) {
1089 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1090 "qla_target(%d): Unable to create session "
1091 "work, command will be refused", 0);
1092 return -ENOMEM;
1093 }
1094
1095 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1096 "Scheduling work (type %d, prm %p)"
1097 " to find session for param %p (size %d, tgt %p)\n",
1098 type, prm, param, param_size, tgt);
1099
1100 prm->type = type;
1101 memcpy(&prm->tm_iocb, param, param_size);
1102
1103 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1104 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1105 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1106
1107 schedule_work(&tgt->sess_work);
1108
1109 return 0;
1110 }
1111
1112 /*
1113 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1114 */
qlt_send_notify_ack(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * ntfy,uint32_t add_flags,uint16_t resp_code,int resp_code_valid,uint16_t srr_flags,uint16_t srr_reject_code,uint8_t srr_explan)1115 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1116 struct imm_ntfy_from_isp *ntfy,
1117 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1118 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1119 {
1120 struct qla_hw_data *ha = vha->hw;
1121 request_t *pkt;
1122 struct nack_to_isp *nack;
1123
1124 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1125
1126 /* Send marker if required */
1127 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1128 return;
1129
1130 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1131 if (!pkt) {
1132 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1133 "qla_target(%d): %s failed: unable to allocate "
1134 "request packet\n", vha->vp_idx, __func__);
1135 return;
1136 }
1137
1138 if (vha->vha_tgt.qla_tgt != NULL)
1139 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1140
1141 pkt->entry_type = NOTIFY_ACK_TYPE;
1142 pkt->entry_count = 1;
1143
1144 nack = (struct nack_to_isp *)pkt;
1145 nack->ox_id = ntfy->ox_id;
1146
1147 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1148 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1149 nack->u.isp24.flags = ntfy->u.isp24.flags &
1150 cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1151 }
1152 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1153 nack->u.isp24.status = ntfy->u.isp24.status;
1154 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1155 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1156 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1157 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1158 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1159 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1160 nack->u.isp24.srr_reject_code = srr_reject_code;
1161 nack->u.isp24.srr_reject_code_expl = srr_explan;
1162 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1163
1164 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1165 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1166 vha->vp_idx, nack->u.isp24.status);
1167
1168 /* Memory Barrier */
1169 wmb();
1170 qla2x00_start_iocbs(vha, vha->req);
1171 }
1172
1173 /*
1174 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1175 */
qlt_24xx_send_abts_resp(struct scsi_qla_host * vha,struct abts_recv_from_24xx * abts,uint32_t status,bool ids_reversed)1176 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1177 struct abts_recv_from_24xx *abts, uint32_t status,
1178 bool ids_reversed)
1179 {
1180 struct qla_hw_data *ha = vha->hw;
1181 struct abts_resp_to_24xx *resp;
1182 uint32_t f_ctl;
1183 uint8_t *p;
1184
1185 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1186 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1187 ha, abts, status);
1188
1189 /* Send marker if required */
1190 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1191 return;
1192
1193 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1194 if (!resp) {
1195 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1196 "qla_target(%d): %s failed: unable to allocate "
1197 "request packet", vha->vp_idx, __func__);
1198 return;
1199 }
1200
1201 resp->entry_type = ABTS_RESP_24XX;
1202 resp->entry_count = 1;
1203 resp->nport_handle = abts->nport_handle;
1204 resp->vp_index = vha->vp_idx;
1205 resp->sof_type = abts->sof_type;
1206 resp->exchange_address = abts->exchange_address;
1207 resp->fcp_hdr_le = abts->fcp_hdr_le;
1208 f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1209 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1210 F_CTL_SEQ_INITIATIVE);
1211 p = (uint8_t *)&f_ctl;
1212 resp->fcp_hdr_le.f_ctl[0] = *p++;
1213 resp->fcp_hdr_le.f_ctl[1] = *p++;
1214 resp->fcp_hdr_le.f_ctl[2] = *p;
1215 if (ids_reversed) {
1216 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1217 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1218 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1219 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1220 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1221 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1222 } else {
1223 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1224 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1225 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1226 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1227 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1228 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1229 }
1230 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1231 if (status == FCP_TMF_CMPL) {
1232 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1233 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1234 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1235 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1236 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1237 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1238 } else {
1239 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1240 resp->payload.ba_rjt.reason_code =
1241 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1242 /* Other bytes are zero */
1243 }
1244
1245 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1246
1247 /* Memory Barrier */
1248 wmb();
1249 qla2x00_start_iocbs(vha, vha->req);
1250 }
1251
1252 /*
1253 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1254 */
qlt_24xx_retry_term_exchange(struct scsi_qla_host * vha,struct abts_resp_from_24xx_fw * entry)1255 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1256 struct abts_resp_from_24xx_fw *entry)
1257 {
1258 struct ctio7_to_24xx *ctio;
1259
1260 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1261 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1262 /* Send marker if required */
1263 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1264 return;
1265
1266 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1267 if (ctio == NULL) {
1268 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1269 "qla_target(%d): %s failed: unable to allocate "
1270 "request packet\n", vha->vp_idx, __func__);
1271 return;
1272 }
1273
1274 /*
1275 * We've got on entrance firmware's response on by us generated
1276 * ABTS response. So, in it ID fields are reversed.
1277 */
1278
1279 ctio->entry_type = CTIO_TYPE7;
1280 ctio->entry_count = 1;
1281 ctio->nport_handle = entry->nport_handle;
1282 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1283 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1284 ctio->vp_index = vha->vp_idx;
1285 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1286 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1287 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1288 ctio->exchange_addr = entry->exchange_addr_to_abort;
1289 ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1290 CTIO7_FLAGS_TERMINATE);
1291 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1292
1293 /* Memory Barrier */
1294 wmb();
1295 qla2x00_start_iocbs(vha, vha->req);
1296
1297 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1298 FCP_TMF_CMPL, true);
1299 }
1300
abort_cmd_for_tag(struct scsi_qla_host * vha,uint32_t tag)1301 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1302 {
1303 struct qla_tgt_sess_op *op;
1304 struct qla_tgt_cmd *cmd;
1305
1306 spin_lock(&vha->cmd_list_lock);
1307
1308 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1309 if (tag == op->atio.u.isp24.exchange_addr) {
1310 op->aborted = true;
1311 spin_unlock(&vha->cmd_list_lock);
1312 return 1;
1313 }
1314 }
1315
1316 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1317 if (tag == cmd->atio.u.isp24.exchange_addr) {
1318 cmd->state = QLA_TGT_STATE_ABORTED;
1319 spin_unlock(&vha->cmd_list_lock);
1320 return 1;
1321 }
1322 }
1323
1324 spin_unlock(&vha->cmd_list_lock);
1325 return 0;
1326 }
1327
1328 /* drop cmds for the given lun
1329 * XXX only looks for cmds on the port through which lun reset was recieved
1330 * XXX does not go through the list of other port (which may have cmds
1331 * for the same lun)
1332 */
abort_cmds_for_lun(struct scsi_qla_host * vha,uint32_t lun,uint8_t * s_id)1333 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1334 uint32_t lun, uint8_t *s_id)
1335 {
1336 struct qla_tgt_sess_op *op;
1337 struct qla_tgt_cmd *cmd;
1338 uint32_t key;
1339
1340 key = sid_to_key(s_id);
1341 spin_lock(&vha->cmd_list_lock);
1342 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1343 uint32_t op_key;
1344 uint32_t op_lun;
1345
1346 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1347 op_lun = scsilun_to_int(
1348 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1349 if (op_key == key && op_lun == lun)
1350 op->aborted = true;
1351 }
1352 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1353 uint32_t cmd_key;
1354 uint32_t cmd_lun;
1355
1356 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1357 cmd_lun = scsilun_to_int(
1358 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1359 if (cmd_key == key && cmd_lun == lun)
1360 cmd->state = QLA_TGT_STATE_ABORTED;
1361 }
1362 spin_unlock(&vha->cmd_list_lock);
1363 }
1364
1365 /* ha->hardware_lock supposed to be held on entry */
__qlt_24xx_handle_abts(struct scsi_qla_host * vha,struct abts_recv_from_24xx * abts,struct qla_tgt_sess * sess)1366 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1367 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1368 {
1369 struct qla_hw_data *ha = vha->hw;
1370 struct se_session *se_sess = sess->se_sess;
1371 struct qla_tgt_mgmt_cmd *mcmd;
1372 struct se_cmd *se_cmd;
1373 u32 lun = 0;
1374 int rc;
1375 bool found_lun = false;
1376
1377 spin_lock(&se_sess->sess_cmd_lock);
1378 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1379 struct qla_tgt_cmd *cmd =
1380 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1381 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1382 lun = cmd->unpacked_lun;
1383 found_lun = true;
1384 break;
1385 }
1386 }
1387 spin_unlock(&se_sess->sess_cmd_lock);
1388
1389 /* cmd not in LIO lists, look in qla list */
1390 if (!found_lun) {
1391 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1392 /* send TASK_ABORT response immediately */
1393 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1394 return 0;
1395 } else {
1396 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1397 "unable to find cmd in driver or LIO for tag 0x%x\n",
1398 abts->exchange_addr_to_abort);
1399 return -ENOENT;
1400 }
1401 }
1402
1403 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1404 "qla_target(%d): task abort (tag=%d)\n",
1405 vha->vp_idx, abts->exchange_addr_to_abort);
1406
1407 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1408 if (mcmd == NULL) {
1409 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1410 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1411 vha->vp_idx, __func__);
1412 return -ENOMEM;
1413 }
1414 memset(mcmd, 0, sizeof(*mcmd));
1415
1416 mcmd->sess = sess;
1417 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1418 mcmd->reset_count = vha->hw->chip_reset;
1419
1420 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1421 abts->exchange_addr_to_abort);
1422 if (rc != 0) {
1423 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1424 "qla_target(%d): tgt_ops->handle_tmr()"
1425 " failed: %d", vha->vp_idx, rc);
1426 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1427 return -EFAULT;
1428 }
1429
1430 return 0;
1431 }
1432
1433 /*
1434 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1435 */
qlt_24xx_handle_abts(struct scsi_qla_host * vha,struct abts_recv_from_24xx * abts)1436 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1437 struct abts_recv_from_24xx *abts)
1438 {
1439 struct qla_hw_data *ha = vha->hw;
1440 struct qla_tgt_sess *sess;
1441 uint32_t tag = abts->exchange_addr_to_abort;
1442 uint8_t s_id[3];
1443 int rc;
1444
1445 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1446 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1447 "qla_target(%d): ABTS: Abort Sequence not "
1448 "supported\n", vha->vp_idx);
1449 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1450 return;
1451 }
1452
1453 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1454 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1455 "qla_target(%d): ABTS: Unknown Exchange "
1456 "Address received\n", vha->vp_idx);
1457 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1458 return;
1459 }
1460
1461 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1462 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1463 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1464 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1465 le32_to_cpu(abts->fcp_hdr_le.parameter));
1466
1467 s_id[0] = abts->fcp_hdr_le.s_id[2];
1468 s_id[1] = abts->fcp_hdr_le.s_id[1];
1469 s_id[2] = abts->fcp_hdr_le.s_id[0];
1470
1471 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1472 if (!sess) {
1473 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1474 "qla_target(%d): task abort for non-existant session\n",
1475 vha->vp_idx);
1476 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1477 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1478 if (rc != 0) {
1479 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1480 false);
1481 }
1482 return;
1483 }
1484
1485 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1486 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1487 return;
1488 }
1489
1490 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1491 if (rc != 0) {
1492 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1493 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1494 vha->vp_idx, rc);
1495 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1496 return;
1497 }
1498 }
1499
1500 /*
1501 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1502 */
qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host * ha,struct qla_tgt_mgmt_cmd * mcmd,uint32_t resp_code)1503 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1504 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1505 {
1506 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1507 struct ctio7_to_24xx *ctio;
1508 uint16_t temp;
1509
1510 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1511 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1512 ha, atio, resp_code);
1513
1514 /* Send marker if required */
1515 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1516 return;
1517
1518 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1519 if (ctio == NULL) {
1520 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1521 "qla_target(%d): %s failed: unable to allocate "
1522 "request packet\n", ha->vp_idx, __func__);
1523 return;
1524 }
1525
1526 ctio->entry_type = CTIO_TYPE7;
1527 ctio->entry_count = 1;
1528 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1529 ctio->nport_handle = mcmd->sess->loop_id;
1530 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1531 ctio->vp_index = ha->vp_idx;
1532 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1533 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1534 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1535 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1536 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1537 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1538 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1539 ctio->u.status1.ox_id = cpu_to_le16(temp);
1540 ctio->u.status1.scsi_status =
1541 cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1542 ctio->u.status1.response_len = cpu_to_le16(8);
1543 ctio->u.status1.sense_data[0] = resp_code;
1544
1545 /* Memory Barrier */
1546 wmb();
1547 qla2x00_start_iocbs(ha, ha->req);
1548 }
1549
qlt_free_mcmd(struct qla_tgt_mgmt_cmd * mcmd)1550 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1551 {
1552 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1553 }
1554 EXPORT_SYMBOL(qlt_free_mcmd);
1555
1556 /* callback from target fabric module code */
qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd * mcmd)1557 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1558 {
1559 struct scsi_qla_host *vha = mcmd->sess->vha;
1560 struct qla_hw_data *ha = vha->hw;
1561 unsigned long flags;
1562
1563 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1564 "TM response mcmd (%p) status %#x state %#x",
1565 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1566
1567 spin_lock_irqsave(&ha->hardware_lock, flags);
1568
1569 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1570 /*
1571 * Either a chip reset is active or this request was from
1572 * previous life, just abort the processing.
1573 */
1574 ql_dbg(ql_dbg_async, vha, 0xe100,
1575 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1576 qla2x00_reset_active(vha), mcmd->reset_count,
1577 ha->chip_reset);
1578 ha->tgt.tgt_ops->free_mcmd(mcmd);
1579 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1580 return;
1581 }
1582
1583 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1584 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1585 0, 0, 0, 0, 0, 0);
1586 else {
1587 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1588 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1589 mcmd->fc_tm_rsp, false);
1590 else
1591 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1592 mcmd->fc_tm_rsp);
1593 }
1594 /*
1595 * Make the callback for ->free_mcmd() to queue_work() and invoke
1596 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1597 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1598 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1599 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1600 * qlt_xmit_tm_rsp() returns here..
1601 */
1602 ha->tgt.tgt_ops->free_mcmd(mcmd);
1603 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1604 }
1605 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1606
1607 /* No locks */
qlt_pci_map_calc_cnt(struct qla_tgt_prm * prm)1608 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1609 {
1610 struct qla_tgt_cmd *cmd = prm->cmd;
1611
1612 BUG_ON(cmd->sg_cnt == 0);
1613
1614 prm->sg = (struct scatterlist *)cmd->sg;
1615 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1616 cmd->sg_cnt, cmd->dma_data_direction);
1617 if (unlikely(prm->seg_cnt == 0))
1618 goto out_err;
1619
1620 prm->cmd->sg_mapped = 1;
1621
1622 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1623 /*
1624 * If greater than four sg entries then we need to allocate
1625 * the continuation entries
1626 */
1627 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1628 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1629 prm->tgt->datasegs_per_cmd,
1630 prm->tgt->datasegs_per_cont);
1631 } else {
1632 /* DIF */
1633 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1634 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1635 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1636 prm->tot_dsds = prm->seg_cnt;
1637 } else
1638 prm->tot_dsds = prm->seg_cnt;
1639
1640 if (cmd->prot_sg_cnt) {
1641 prm->prot_sg = cmd->prot_sg;
1642 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1643 cmd->prot_sg, cmd->prot_sg_cnt,
1644 cmd->dma_data_direction);
1645 if (unlikely(prm->prot_seg_cnt == 0))
1646 goto out_err;
1647
1648 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1649 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1650 /* Dif Bundling not support here */
1651 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1652 cmd->blk_sz);
1653 prm->tot_dsds += prm->prot_seg_cnt;
1654 } else
1655 prm->tot_dsds += prm->prot_seg_cnt;
1656 }
1657 }
1658
1659 return 0;
1660
1661 out_err:
1662 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1663 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1664 0, prm->cmd->sg_cnt);
1665 return -1;
1666 }
1667
qlt_unmap_sg(struct scsi_qla_host * vha,struct qla_tgt_cmd * cmd)1668 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1669 {
1670 struct qla_hw_data *ha = vha->hw;
1671
1672 if (!cmd->sg_mapped)
1673 return;
1674
1675 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1676 cmd->sg_mapped = 0;
1677
1678 if (cmd->prot_sg_cnt)
1679 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1680 cmd->dma_data_direction);
1681
1682 if (cmd->ctx_dsd_alloced)
1683 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1684
1685 if (cmd->ctx)
1686 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1687 }
1688
qlt_check_reserve_free_req(struct scsi_qla_host * vha,uint32_t req_cnt)1689 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1690 uint32_t req_cnt)
1691 {
1692 uint32_t cnt, cnt_in;
1693
1694 if (vha->req->cnt < (req_cnt + 2)) {
1695 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1696 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1697
1698 if (vha->req->ring_index < cnt)
1699 vha->req->cnt = cnt - vha->req->ring_index;
1700 else
1701 vha->req->cnt = vha->req->length -
1702 (vha->req->ring_index - cnt);
1703 }
1704
1705 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1706 ql_dbg(ql_dbg_io, vha, 0x305a,
1707 "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",
1708 vha->vp_idx, vha->req->ring_index,
1709 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1710 return -EAGAIN;
1711 }
1712 vha->req->cnt -= req_cnt;
1713
1714 return 0;
1715 }
1716
1717 /*
1718 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1719 */
qlt_get_req_pkt(struct scsi_qla_host * vha)1720 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1721 {
1722 /* Adjust ring index. */
1723 vha->req->ring_index++;
1724 if (vha->req->ring_index == vha->req->length) {
1725 vha->req->ring_index = 0;
1726 vha->req->ring_ptr = vha->req->ring;
1727 } else {
1728 vha->req->ring_ptr++;
1729 }
1730 return (cont_entry_t *)vha->req->ring_ptr;
1731 }
1732
1733 /* ha->hardware_lock supposed to be held on entry */
qlt_make_handle(struct scsi_qla_host * vha)1734 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1735 {
1736 struct qla_hw_data *ha = vha->hw;
1737 uint32_t h;
1738
1739 h = ha->tgt.current_handle;
1740 /* always increment cmd handle */
1741 do {
1742 ++h;
1743 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1744 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1745 if (h == ha->tgt.current_handle) {
1746 ql_dbg(ql_dbg_io, vha, 0x305b,
1747 "qla_target(%d): Ran out of "
1748 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1749 h = QLA_TGT_NULL_HANDLE;
1750 break;
1751 }
1752 } while ((h == QLA_TGT_NULL_HANDLE) ||
1753 (h == QLA_TGT_SKIP_HANDLE) ||
1754 (ha->tgt.cmds[h-1] != NULL));
1755
1756 if (h != QLA_TGT_NULL_HANDLE)
1757 ha->tgt.current_handle = h;
1758
1759 return h;
1760 }
1761
1762 /* ha->hardware_lock supposed to be held on entry */
qlt_24xx_build_ctio_pkt(struct qla_tgt_prm * prm,struct scsi_qla_host * vha)1763 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1764 struct scsi_qla_host *vha)
1765 {
1766 uint32_t h;
1767 struct ctio7_to_24xx *pkt;
1768 struct qla_hw_data *ha = vha->hw;
1769 struct atio_from_isp *atio = &prm->cmd->atio;
1770 uint16_t temp;
1771
1772 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1773 prm->pkt = pkt;
1774 memset(pkt, 0, sizeof(*pkt));
1775
1776 pkt->entry_type = CTIO_TYPE7;
1777 pkt->entry_count = (uint8_t)prm->req_cnt;
1778 pkt->vp_index = vha->vp_idx;
1779
1780 h = qlt_make_handle(vha);
1781 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1782 /*
1783 * CTIO type 7 from the firmware doesn't provide a way to
1784 * know the initiator's LOOP ID, hence we can't find
1785 * the session and, so, the command.
1786 */
1787 return -EAGAIN;
1788 } else
1789 ha->tgt.cmds[h-1] = prm->cmd;
1790
1791 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1792 pkt->nport_handle = prm->cmd->loop_id;
1793 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1794 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1795 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1796 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1797 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1798 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1799 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1800 pkt->u.status0.ox_id = cpu_to_le16(temp);
1801 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1802
1803 return 0;
1804 }
1805
1806 /*
1807 * ha->hardware_lock supposed to be held on entry. We have already made sure
1808 * that there is sufficient amount of request entries to not drop it.
1809 */
qlt_load_cont_data_segments(struct qla_tgt_prm * prm,struct scsi_qla_host * vha)1810 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1811 struct scsi_qla_host *vha)
1812 {
1813 int cnt;
1814 uint32_t *dword_ptr;
1815 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1816
1817 /* Build continuation packets */
1818 while (prm->seg_cnt > 0) {
1819 cont_a64_entry_t *cont_pkt64 =
1820 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1821
1822 /*
1823 * Make sure that from cont_pkt64 none of
1824 * 64-bit specific fields used for 32-bit
1825 * addressing. Cast to (cont_entry_t *) for
1826 * that.
1827 */
1828
1829 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1830
1831 cont_pkt64->entry_count = 1;
1832 cont_pkt64->sys_define = 0;
1833
1834 if (enable_64bit_addressing) {
1835 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1836 dword_ptr =
1837 (uint32_t *)&cont_pkt64->dseg_0_address;
1838 } else {
1839 cont_pkt64->entry_type = CONTINUE_TYPE;
1840 dword_ptr =
1841 (uint32_t *)&((cont_entry_t *)
1842 cont_pkt64)->dseg_0_address;
1843 }
1844
1845 /* Load continuation entry data segments */
1846 for (cnt = 0;
1847 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1848 cnt++, prm->seg_cnt--) {
1849 *dword_ptr++ =
1850 cpu_to_le32(pci_dma_lo32
1851 (sg_dma_address(prm->sg)));
1852 if (enable_64bit_addressing) {
1853 *dword_ptr++ =
1854 cpu_to_le32(pci_dma_hi32
1855 (sg_dma_address
1856 (prm->sg)));
1857 }
1858 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1859
1860 prm->sg = sg_next(prm->sg);
1861 }
1862 }
1863 }
1864
1865 /*
1866 * ha->hardware_lock supposed to be held on entry. We have already made sure
1867 * that there is sufficient amount of request entries to not drop it.
1868 */
qlt_load_data_segments(struct qla_tgt_prm * prm,struct scsi_qla_host * vha)1869 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1870 struct scsi_qla_host *vha)
1871 {
1872 int cnt;
1873 uint32_t *dword_ptr;
1874 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1875 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1876
1877 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1878
1879 /* Setup packet address segment pointer */
1880 dword_ptr = pkt24->u.status0.dseg_0_address;
1881
1882 /* Set total data segment count */
1883 if (prm->seg_cnt)
1884 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1885
1886 if (prm->seg_cnt == 0) {
1887 /* No data transfer */
1888 *dword_ptr++ = 0;
1889 *dword_ptr = 0;
1890 return;
1891 }
1892
1893 /* If scatter gather */
1894
1895 /* Load command entry data segments */
1896 for (cnt = 0;
1897 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1898 cnt++, prm->seg_cnt--) {
1899 *dword_ptr++ =
1900 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1901 if (enable_64bit_addressing) {
1902 *dword_ptr++ =
1903 cpu_to_le32(pci_dma_hi32(
1904 sg_dma_address(prm->sg)));
1905 }
1906 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1907
1908 prm->sg = sg_next(prm->sg);
1909 }
1910
1911 qlt_load_cont_data_segments(prm, vha);
1912 }
1913
qlt_has_data(struct qla_tgt_cmd * cmd)1914 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1915 {
1916 return cmd->bufflen > 0;
1917 }
1918
1919 /*
1920 * Called without ha->hardware_lock held
1921 */
qlt_pre_xmit_response(struct qla_tgt_cmd * cmd,struct qla_tgt_prm * prm,int xmit_type,uint8_t scsi_status,uint32_t * full_req_cnt)1922 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1923 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1924 uint32_t *full_req_cnt)
1925 {
1926 struct qla_tgt *tgt = cmd->tgt;
1927 struct scsi_qla_host *vha = tgt->vha;
1928 struct qla_hw_data *ha = vha->hw;
1929 struct se_cmd *se_cmd = &cmd->se_cmd;
1930
1931 prm->cmd = cmd;
1932 prm->tgt = tgt;
1933 prm->rq_result = scsi_status;
1934 prm->sense_buffer = &cmd->sense_buffer[0];
1935 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1936 prm->sg = NULL;
1937 prm->seg_cnt = -1;
1938 prm->req_cnt = 1;
1939 prm->add_status_pkt = 0;
1940
1941 /* Send marker if required */
1942 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1943 return -EFAULT;
1944
1945 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1946 if (qlt_pci_map_calc_cnt(prm) != 0)
1947 return -EAGAIN;
1948 }
1949
1950 *full_req_cnt = prm->req_cnt;
1951
1952 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1953 prm->residual = se_cmd->residual_count;
1954 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1955 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1956 prm->residual, se_cmd->tag,
1957 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1958 cmd->bufflen, prm->rq_result);
1959 prm->rq_result |= SS_RESIDUAL_UNDER;
1960 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1961 prm->residual = se_cmd->residual_count;
1962 ql_dbg(ql_dbg_io, vha, 0x305d,
1963 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1964 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1965 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1966 prm->rq_result |= SS_RESIDUAL_OVER;
1967 }
1968
1969 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1970 /*
1971 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1972 * ignored in *xmit_response() below
1973 */
1974 if (qlt_has_data(cmd)) {
1975 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1976 (IS_FWI2_CAPABLE(ha) &&
1977 (prm->rq_result != 0))) {
1978 prm->add_status_pkt = 1;
1979 (*full_req_cnt)++;
1980 }
1981 }
1982 }
1983
1984 return 0;
1985 }
1986
qlt_need_explicit_conf(struct qla_hw_data * ha,struct qla_tgt_cmd * cmd,int sending_sense)1987 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1988 struct qla_tgt_cmd *cmd, int sending_sense)
1989 {
1990 if (ha->tgt.enable_class_2)
1991 return 0;
1992
1993 if (sending_sense)
1994 return cmd->conf_compl_supported;
1995 else
1996 return ha->tgt.enable_explicit_conf &&
1997 cmd->conf_compl_supported;
1998 }
1999
2000 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2001 /*
2002 * Original taken from the XFS code
2003 */
qlt_srr_random(void)2004 static unsigned long qlt_srr_random(void)
2005 {
2006 static int Inited;
2007 static unsigned long RandomValue;
2008 static DEFINE_SPINLOCK(lock);
2009 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2010 register long rv;
2011 register long lo;
2012 register long hi;
2013 unsigned long flags;
2014
2015 spin_lock_irqsave(&lock, flags);
2016 if (!Inited) {
2017 RandomValue = jiffies;
2018 Inited = 1;
2019 }
2020 rv = RandomValue;
2021 hi = rv / 127773;
2022 lo = rv % 127773;
2023 rv = 16807 * lo - 2836 * hi;
2024 if (rv <= 0)
2025 rv += 2147483647;
2026 RandomValue = rv;
2027 spin_unlock_irqrestore(&lock, flags);
2028 return rv;
2029 }
2030
qlt_check_srr_debug(struct qla_tgt_cmd * cmd,int * xmit_type)2031 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2032 {
2033 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2034 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2035 == 50) {
2036 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2037 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2038 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2039 }
2040 #endif
2041 /*
2042 * It's currently not possible to simulate SRRs for FCP_WRITE without
2043 * a physical link layer failure, so don't even try here..
2044 */
2045 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2046 return;
2047
2048 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2049 ((qlt_srr_random() % 100) == 20)) {
2050 int i, leave = 0;
2051 unsigned int tot_len = 0;
2052
2053 while (leave == 0)
2054 leave = qlt_srr_random() % cmd->sg_cnt;
2055
2056 for (i = 0; i < leave; i++)
2057 tot_len += cmd->sg[i].length;
2058
2059 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2060 "Cutting cmd %p (tag %d) buffer"
2061 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2062 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2063 cmd->bufflen, cmd->sg_cnt);
2064
2065 cmd->bufflen = tot_len;
2066 cmd->sg_cnt = leave;
2067 }
2068
2069 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2070 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2071
2072 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2073 "Cutting cmd %p (tag %d) buffer head "
2074 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2075 cmd->bufflen);
2076 if (offset == 0)
2077 *xmit_type &= ~QLA_TGT_XMIT_DATA;
2078 else if (qlt_set_data_offset(cmd, offset)) {
2079 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2080 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2081 }
2082 }
2083 }
2084 #else
qlt_check_srr_debug(struct qla_tgt_cmd * cmd,int * xmit_type)2085 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2086 {}
2087 #endif
2088
qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx * ctio,struct qla_tgt_prm * prm)2089 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2090 struct qla_tgt_prm *prm)
2091 {
2092 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2093 (uint32_t)sizeof(ctio->u.status1.sense_data));
2094 ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2095 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2096 ctio->u.status0.flags |= cpu_to_le16(
2097 CTIO7_FLAGS_EXPLICIT_CONFORM |
2098 CTIO7_FLAGS_CONFORM_REQ);
2099 }
2100 ctio->u.status0.residual = cpu_to_le32(prm->residual);
2101 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2102 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2103 int i;
2104
2105 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2106 if (prm->cmd->se_cmd.scsi_status != 0) {
2107 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2108 "Skipping EXPLICIT_CONFORM and "
2109 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2110 "non GOOD status\n");
2111 goto skip_explict_conf;
2112 }
2113 ctio->u.status1.flags |= cpu_to_le16(
2114 CTIO7_FLAGS_EXPLICIT_CONFORM |
2115 CTIO7_FLAGS_CONFORM_REQ);
2116 }
2117 skip_explict_conf:
2118 ctio->u.status1.flags &=
2119 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2120 ctio->u.status1.flags |=
2121 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2122 ctio->u.status1.scsi_status |=
2123 cpu_to_le16(SS_SENSE_LEN_VALID);
2124 ctio->u.status1.sense_length =
2125 cpu_to_le16(prm->sense_buffer_len);
2126 for (i = 0; i < prm->sense_buffer_len/4; i++)
2127 ((uint32_t *)ctio->u.status1.sense_data)[i] =
2128 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2129 #if 0
2130 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2131 static int q;
2132 if (q < 10) {
2133 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2134 "qla_target(%d): %d bytes of sense "
2135 "lost", prm->tgt->ha->vp_idx,
2136 prm->sense_buffer_len % 4);
2137 q++;
2138 }
2139 }
2140 #endif
2141 } else {
2142 ctio->u.status1.flags &=
2143 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2144 ctio->u.status1.flags |=
2145 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2146 ctio->u.status1.sense_length = 0;
2147 memset(ctio->u.status1.sense_data, 0,
2148 sizeof(ctio->u.status1.sense_data));
2149 }
2150
2151 /* Sense with len > 24, is it possible ??? */
2152 }
2153
2154
2155
2156 /* diff */
2157 static inline int
qlt_hba_err_chk_enabled(struct se_cmd * se_cmd)2158 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2159 {
2160 /*
2161 * Uncomment when corresponding SCSI changes are done.
2162 *
2163 if (!sp->cmd->prot_chk)
2164 return 0;
2165 *
2166 */
2167 switch (se_cmd->prot_op) {
2168 case TARGET_PROT_DOUT_INSERT:
2169 case TARGET_PROT_DIN_STRIP:
2170 if (ql2xenablehba_err_chk >= 1)
2171 return 1;
2172 break;
2173 case TARGET_PROT_DOUT_PASS:
2174 case TARGET_PROT_DIN_PASS:
2175 if (ql2xenablehba_err_chk >= 2)
2176 return 1;
2177 break;
2178 case TARGET_PROT_DIN_INSERT:
2179 case TARGET_PROT_DOUT_STRIP:
2180 return 1;
2181 default:
2182 break;
2183 }
2184 return 0;
2185 }
2186
2187 /*
2188 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2189 *
2190 */
2191 static inline void
qlt_set_t10dif_tags(struct se_cmd * se_cmd,struct crc_context * ctx)2192 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2193 {
2194 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2195
2196 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2197 * have been immplemented by TCM, before AppTag is avail.
2198 * Look for modesense_handlers[]
2199 */
2200 ctx->app_tag = 0;
2201 ctx->app_tag_mask[0] = 0x0;
2202 ctx->app_tag_mask[1] = 0x0;
2203
2204 switch (se_cmd->prot_type) {
2205 case TARGET_DIF_TYPE0_PROT:
2206 /*
2207 * No check for ql2xenablehba_err_chk, as it would be an
2208 * I/O error if hba tag generation is not done.
2209 */
2210 ctx->ref_tag = cpu_to_le32(lba);
2211
2212 if (!qlt_hba_err_chk_enabled(se_cmd))
2213 break;
2214
2215 /* enable ALL bytes of the ref tag */
2216 ctx->ref_tag_mask[0] = 0xff;
2217 ctx->ref_tag_mask[1] = 0xff;
2218 ctx->ref_tag_mask[2] = 0xff;
2219 ctx->ref_tag_mask[3] = 0xff;
2220 break;
2221 /*
2222 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2223 * 16 bit app tag.
2224 */
2225 case TARGET_DIF_TYPE1_PROT:
2226 ctx->ref_tag = cpu_to_le32(lba);
2227
2228 if (!qlt_hba_err_chk_enabled(se_cmd))
2229 break;
2230
2231 /* enable ALL bytes of the ref tag */
2232 ctx->ref_tag_mask[0] = 0xff;
2233 ctx->ref_tag_mask[1] = 0xff;
2234 ctx->ref_tag_mask[2] = 0xff;
2235 ctx->ref_tag_mask[3] = 0xff;
2236 break;
2237 /*
2238 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2239 * match LBA in CDB + N
2240 */
2241 case TARGET_DIF_TYPE2_PROT:
2242 ctx->ref_tag = cpu_to_le32(lba);
2243
2244 if (!qlt_hba_err_chk_enabled(se_cmd))
2245 break;
2246
2247 /* enable ALL bytes of the ref tag */
2248 ctx->ref_tag_mask[0] = 0xff;
2249 ctx->ref_tag_mask[1] = 0xff;
2250 ctx->ref_tag_mask[2] = 0xff;
2251 ctx->ref_tag_mask[3] = 0xff;
2252 break;
2253
2254 /* For Type 3 protection: 16 bit GUARD only */
2255 case TARGET_DIF_TYPE3_PROT:
2256 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2257 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2258 break;
2259 }
2260 }
2261
2262
2263 static inline int
qlt_build_ctio_crc2_pkt(struct qla_tgt_prm * prm,scsi_qla_host_t * vha)2264 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2265 {
2266 uint32_t *cur_dsd;
2267 uint32_t transfer_length = 0;
2268 uint32_t data_bytes;
2269 uint32_t dif_bytes;
2270 uint8_t bundling = 1;
2271 uint8_t *clr_ptr;
2272 struct crc_context *crc_ctx_pkt = NULL;
2273 struct qla_hw_data *ha;
2274 struct ctio_crc2_to_fw *pkt;
2275 dma_addr_t crc_ctx_dma;
2276 uint16_t fw_prot_opts = 0;
2277 struct qla_tgt_cmd *cmd = prm->cmd;
2278 struct se_cmd *se_cmd = &cmd->se_cmd;
2279 uint32_t h;
2280 struct atio_from_isp *atio = &prm->cmd->atio;
2281 uint16_t t16;
2282
2283 ha = vha->hw;
2284
2285 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2286 prm->pkt = pkt;
2287 memset(pkt, 0, sizeof(*pkt));
2288
2289 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2290 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2291 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2292 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2293
2294 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2295 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2296 bundling = 0;
2297
2298 /* Compute dif len and adjust data len to incude protection */
2299 data_bytes = cmd->bufflen;
2300 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2301
2302 switch (se_cmd->prot_op) {
2303 case TARGET_PROT_DIN_INSERT:
2304 case TARGET_PROT_DOUT_STRIP:
2305 transfer_length = data_bytes;
2306 data_bytes += dif_bytes;
2307 break;
2308
2309 case TARGET_PROT_DIN_STRIP:
2310 case TARGET_PROT_DOUT_INSERT:
2311 case TARGET_PROT_DIN_PASS:
2312 case TARGET_PROT_DOUT_PASS:
2313 transfer_length = data_bytes + dif_bytes;
2314 break;
2315
2316 default:
2317 BUG();
2318 break;
2319 }
2320
2321 if (!qlt_hba_err_chk_enabled(se_cmd))
2322 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2323 /* HBA error checking enabled */
2324 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2325 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2326 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2327 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2328 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2329 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2330 }
2331
2332 switch (se_cmd->prot_op) {
2333 case TARGET_PROT_DIN_INSERT:
2334 case TARGET_PROT_DOUT_INSERT:
2335 fw_prot_opts |= PO_MODE_DIF_INSERT;
2336 break;
2337 case TARGET_PROT_DIN_STRIP:
2338 case TARGET_PROT_DOUT_STRIP:
2339 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2340 break;
2341 case TARGET_PROT_DIN_PASS:
2342 case TARGET_PROT_DOUT_PASS:
2343 fw_prot_opts |= PO_MODE_DIF_PASS;
2344 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2345 break;
2346 default:/* Normal Request */
2347 fw_prot_opts |= PO_MODE_DIF_PASS;
2348 break;
2349 }
2350
2351
2352 /* ---- PKT ---- */
2353 /* Update entry type to indicate Command Type CRC_2 IOCB */
2354 pkt->entry_type = CTIO_CRC2;
2355 pkt->entry_count = 1;
2356 pkt->vp_index = vha->vp_idx;
2357
2358 h = qlt_make_handle(vha);
2359 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2360 /*
2361 * CTIO type 7 from the firmware doesn't provide a way to
2362 * know the initiator's LOOP ID, hence we can't find
2363 * the session and, so, the command.
2364 */
2365 return -EAGAIN;
2366 } else
2367 ha->tgt.cmds[h-1] = prm->cmd;
2368
2369
2370 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2371 pkt->nport_handle = prm->cmd->loop_id;
2372 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2373 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2374 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2375 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2376 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2377
2378 /* silence compile warning */
2379 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2380 pkt->ox_id = cpu_to_le16(t16);
2381
2382 t16 = (atio->u.isp24.attr << 9);
2383 pkt->flags |= cpu_to_le16(t16);
2384 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2385
2386 /* Set transfer direction */
2387 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2388 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2389 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2390 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2391
2392
2393 pkt->dseg_count = prm->tot_dsds;
2394 /* Fibre channel byte count */
2395 pkt->transfer_length = cpu_to_le32(transfer_length);
2396
2397
2398 /* ----- CRC context -------- */
2399
2400 /* Allocate CRC context from global pool */
2401 crc_ctx_pkt = cmd->ctx =
2402 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2403
2404 if (!crc_ctx_pkt)
2405 goto crc_queuing_error;
2406
2407 /* Zero out CTX area. */
2408 clr_ptr = (uint8_t *)crc_ctx_pkt;
2409 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2410
2411 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2412 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2413
2414 /* Set handle */
2415 crc_ctx_pkt->handle = pkt->handle;
2416
2417 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2418
2419 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2420 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2421 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2422
2423
2424 if (!bundling) {
2425 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2426 } else {
2427 /*
2428 * Configure Bundling if we need to fetch interlaving
2429 * protection PCI accesses
2430 */
2431 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2432 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2433 crc_ctx_pkt->u.bundling.dseg_count =
2434 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2435 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2436 }
2437
2438 /* Finish the common fields of CRC pkt */
2439 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2440 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2441 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2442 crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2443
2444
2445 /* Walks data segments */
2446 pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2447
2448 if (!bundling && prm->prot_seg_cnt) {
2449 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2450 prm->tot_dsds, cmd))
2451 goto crc_queuing_error;
2452 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2453 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2454 goto crc_queuing_error;
2455
2456 if (bundling && prm->prot_seg_cnt) {
2457 /* Walks dif segments */
2458 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2459
2460 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2461 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2462 prm->prot_seg_cnt, cmd))
2463 goto crc_queuing_error;
2464 }
2465 return QLA_SUCCESS;
2466
2467 crc_queuing_error:
2468 /* Cleanup will be performed by the caller */
2469
2470 return QLA_FUNCTION_FAILED;
2471 }
2472
2473
2474 /*
2475 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2476 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2477 */
qlt_xmit_response(struct qla_tgt_cmd * cmd,int xmit_type,uint8_t scsi_status)2478 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2479 uint8_t scsi_status)
2480 {
2481 struct scsi_qla_host *vha = cmd->vha;
2482 struct qla_hw_data *ha = vha->hw;
2483 struct ctio7_to_24xx *pkt;
2484 struct qla_tgt_prm prm;
2485 uint32_t full_req_cnt = 0;
2486 unsigned long flags = 0;
2487 int res;
2488
2489 spin_lock_irqsave(&ha->hardware_lock, flags);
2490 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2491 cmd->state = QLA_TGT_STATE_PROCESSED;
2492 if (cmd->sess->logout_completed)
2493 /* no need to terminate. FW already freed exchange. */
2494 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2495 else
2496 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2497 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2498 return 0;
2499 }
2500 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2501
2502 memset(&prm, 0, sizeof(prm));
2503 qlt_check_srr_debug(cmd, &xmit_type);
2504
2505 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2506 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2507 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2508 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2509 &cmd->se_cmd);
2510
2511 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2512 &full_req_cnt);
2513 if (unlikely(res != 0)) {
2514 return res;
2515 }
2516
2517 spin_lock_irqsave(&ha->hardware_lock, flags);
2518
2519 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2520 /*
2521 * Either a chip reset is active or this request was from
2522 * previous life, just abort the processing.
2523 */
2524 cmd->state = QLA_TGT_STATE_PROCESSED;
2525 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2526 ql_dbg(ql_dbg_async, vha, 0xe101,
2527 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2528 qla2x00_reset_active(vha), cmd->reset_count,
2529 ha->chip_reset);
2530 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2531 return 0;
2532 }
2533
2534 /* Does F/W have an IOCBs for this request */
2535 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2536 if (unlikely(res))
2537 goto out_unmap_unlock;
2538
2539 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2540 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2541 else
2542 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2543 if (unlikely(res != 0)) {
2544 vha->req->cnt += full_req_cnt;
2545 goto out_unmap_unlock;
2546 }
2547
2548 pkt = (struct ctio7_to_24xx *)prm.pkt;
2549
2550 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2551 pkt->u.status0.flags |=
2552 cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2553 CTIO7_FLAGS_STATUS_MODE_0);
2554
2555 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2556 qlt_load_data_segments(&prm, vha);
2557
2558 if (prm.add_status_pkt == 0) {
2559 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2560 pkt->u.status0.scsi_status =
2561 cpu_to_le16(prm.rq_result);
2562 pkt->u.status0.residual =
2563 cpu_to_le32(prm.residual);
2564 pkt->u.status0.flags |= cpu_to_le16(
2565 CTIO7_FLAGS_SEND_STATUS);
2566 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2567 pkt->u.status0.flags |=
2568 cpu_to_le16(
2569 CTIO7_FLAGS_EXPLICIT_CONFORM |
2570 CTIO7_FLAGS_CONFORM_REQ);
2571 }
2572 }
2573
2574 } else {
2575 /*
2576 * We have already made sure that there is sufficient
2577 * amount of request entries to not drop HW lock in
2578 * req_pkt().
2579 */
2580 struct ctio7_to_24xx *ctio =
2581 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2582
2583 ql_dbg(ql_dbg_io, vha, 0x305e,
2584 "Building additional status packet 0x%p.\n",
2585 ctio);
2586
2587 /*
2588 * T10Dif: ctio_crc2_to_fw overlay ontop of
2589 * ctio7_to_24xx
2590 */
2591 memcpy(ctio, pkt, sizeof(*ctio));
2592 /* reset back to CTIO7 */
2593 ctio->entry_count = 1;
2594 ctio->entry_type = CTIO_TYPE7;
2595 ctio->dseg_count = 0;
2596 ctio->u.status1.flags &= ~cpu_to_le16(
2597 CTIO7_FLAGS_DATA_IN);
2598
2599 /* Real finish is ctio_m1's finish */
2600 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2601 pkt->u.status0.flags |= cpu_to_le16(
2602 CTIO7_FLAGS_DONT_RET_CTIO);
2603
2604 /* qlt_24xx_init_ctio_to_isp will correct
2605 * all neccessary fields that's part of CTIO7.
2606 * There should be no residual of CTIO-CRC2 data.
2607 */
2608 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2609 &prm);
2610 pr_debug("Status CTIO7: %p\n", ctio);
2611 }
2612 } else
2613 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2614
2615
2616 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2617 cmd->cmd_sent_to_fw = 1;
2618
2619 /* Memory Barrier */
2620 wmb();
2621 qla2x00_start_iocbs(vha, vha->req);
2622 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2623
2624 return 0;
2625
2626 out_unmap_unlock:
2627 qlt_unmap_sg(vha, cmd);
2628 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2629
2630 return res;
2631 }
2632 EXPORT_SYMBOL(qlt_xmit_response);
2633
qlt_rdy_to_xfer(struct qla_tgt_cmd * cmd)2634 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2635 {
2636 struct ctio7_to_24xx *pkt;
2637 struct scsi_qla_host *vha = cmd->vha;
2638 struct qla_hw_data *ha = vha->hw;
2639 struct qla_tgt *tgt = cmd->tgt;
2640 struct qla_tgt_prm prm;
2641 unsigned long flags;
2642 int res = 0;
2643
2644 memset(&prm, 0, sizeof(prm));
2645 prm.cmd = cmd;
2646 prm.tgt = tgt;
2647 prm.sg = NULL;
2648 prm.req_cnt = 1;
2649
2650 /* Send marker if required */
2651 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2652 return -EIO;
2653
2654 /* Calculate number of entries and segments required */
2655 if (qlt_pci_map_calc_cnt(&prm) != 0)
2656 return -EAGAIN;
2657
2658 spin_lock_irqsave(&ha->hardware_lock, flags);
2659
2660 if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) ||
2661 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2662 /*
2663 * Either a chip reset is active or this request was from
2664 * previous life, just abort the processing.
2665 */
2666 cmd->state = QLA_TGT_STATE_NEED_DATA;
2667 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2668 ql_dbg(ql_dbg_async, vha, 0xe102,
2669 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2670 qla2x00_reset_active(vha), cmd->reset_count,
2671 ha->chip_reset);
2672 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2673 return 0;
2674 }
2675
2676 /* Does F/W have an IOCBs for this request */
2677 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2678 if (res != 0)
2679 goto out_unlock_free_unmap;
2680 if (cmd->se_cmd.prot_op)
2681 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2682 else
2683 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2684
2685 if (unlikely(res != 0)) {
2686 vha->req->cnt += prm.req_cnt;
2687 goto out_unlock_free_unmap;
2688 }
2689
2690 pkt = (struct ctio7_to_24xx *)prm.pkt;
2691 pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2692 CTIO7_FLAGS_STATUS_MODE_0);
2693
2694 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2695 qlt_load_data_segments(&prm, vha);
2696
2697 cmd->state = QLA_TGT_STATE_NEED_DATA;
2698 cmd->cmd_sent_to_fw = 1;
2699
2700 /* Memory Barrier */
2701 wmb();
2702 qla2x00_start_iocbs(vha, vha->req);
2703 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2704
2705 return res;
2706
2707 out_unlock_free_unmap:
2708 qlt_unmap_sg(vha, cmd);
2709 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2710
2711 return res;
2712 }
2713 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2714
2715
2716 /*
2717 * Checks the guard or meta-data for the type of error
2718 * detected by the HBA.
2719 */
2720 static inline int
qlt_handle_dif_error(struct scsi_qla_host * vha,struct qla_tgt_cmd * cmd,struct ctio_crc_from_fw * sts)2721 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2722 struct ctio_crc_from_fw *sts)
2723 {
2724 uint8_t *ap = &sts->actual_dif[0];
2725 uint8_t *ep = &sts->expected_dif[0];
2726 uint32_t e_ref_tag, a_ref_tag;
2727 uint16_t e_app_tag, a_app_tag;
2728 uint16_t e_guard, a_guard;
2729 uint64_t lba = cmd->se_cmd.t_task_lba;
2730
2731 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2732 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2733 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2734
2735 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2736 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2737 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2738
2739 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2740 "iocb(s) %p Returned STATUS.\n", sts);
2741
2742 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2743 "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",
2744 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2745 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2746
2747 /*
2748 * Ignore sector if:
2749 * For type 3: ref & app tag is all 'f's
2750 * For type 0,1,2: app tag is all 'f's
2751 */
2752 if ((a_app_tag == 0xffff) &&
2753 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2754 (a_ref_tag == 0xffffffff))) {
2755 uint32_t blocks_done;
2756
2757 /* 2TB boundary case covered automatically with this */
2758 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2759 cmd->se_cmd.bad_sector = e_ref_tag;
2760 cmd->se_cmd.pi_err = 0;
2761 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2762 "need to return scsi good\n");
2763
2764 /* Update protection tag */
2765 if (cmd->prot_sg_cnt) {
2766 uint32_t i, k = 0, num_ent;
2767 struct scatterlist *sg, *sgl;
2768
2769
2770 sgl = cmd->prot_sg;
2771
2772 /* Patch the corresponding protection tags */
2773 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2774 num_ent = sg_dma_len(sg) / 8;
2775 if (k + num_ent < blocks_done) {
2776 k += num_ent;
2777 continue;
2778 }
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 */
__qlt_send_term_imm_notif(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * ntfy)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;
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
qlt_send_term_imm_notif(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * imm,int ha_locked)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 */
__qlt_send_term_exchange(struct scsi_qla_host * vha,struct qla_tgt_cmd * cmd,struct atio_from_isp * atio)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 = 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 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
qlt_send_term_exchange(struct scsi_qla_host * vha,struct qla_tgt_cmd * cmd,struct atio_from_isp * atio,int ha_locked)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
qlt_init_term_exchange(struct scsi_qla_host * vha)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
qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host * vha)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
qlt_abort_cmd(struct qla_tgt_cmd * cmd)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
qlt_free_cmd(struct qla_tgt_cmd * cmd)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 */
qlt_prepare_srr_ctio(struct scsi_qla_host * vha,struct qla_tgt_cmd * cmd,void * ctio)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 */
qlt_term_ctio_exchange(struct scsi_qla_host * vha,void * ctio,struct qla_tgt_cmd * cmd,uint32_t status)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 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 */
qlt_get_cmd(struct scsi_qla_host * vha,uint32_t handle)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 */
qlt_ctio_to_cmd(struct scsi_qla_host * vha,uint32_t handle,void * ctio)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
qlt_abort_cmd_on_host_reset(struct scsi_qla_host * vha,struct qla_tgt_cmd * cmd)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
qlt_host_reset_handler(struct qla_hw_data * ha)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 */
qlt_do_ctio_completion(struct scsi_qla_host * vha,uint32_t handle,uint32_t status,void * ctio)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 struct qla_tgt_cmd *cmd;
3368
3369 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3370 /* That could happen only in case of an error/reset/abort */
3371 if (status != CTIO_SUCCESS) {
3372 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3373 "Intermediate CTIO received"
3374 " (status %x)\n", status);
3375 }
3376 return;
3377 }
3378
3379 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3380 if (cmd == NULL)
3381 return;
3382
3383 se_cmd = &cmd->se_cmd;
3384 cmd->cmd_sent_to_fw = 0;
3385
3386 qlt_unmap_sg(vha, cmd);
3387
3388 if (unlikely(status != CTIO_SUCCESS)) {
3389 switch (status & 0xFFFF) {
3390 case CTIO_LIP_RESET:
3391 case CTIO_TARGET_RESET:
3392 case CTIO_ABORTED:
3393 /* driver request abort via Terminate exchange */
3394 case CTIO_TIMEOUT:
3395 case CTIO_INVALID_RX_ID:
3396 /* They are OK */
3397 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3398 "qla_target(%d): CTIO with "
3399 "status %#x received, state %x, se_cmd %p, "
3400 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3401 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3402 status, cmd->state, se_cmd);
3403 break;
3404
3405 case CTIO_PORT_LOGGED_OUT:
3406 case CTIO_PORT_UNAVAILABLE:
3407 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3408 "qla_target(%d): CTIO with PORT LOGGED "
3409 "OUT (29) or PORT UNAVAILABLE (28) status %x "
3410 "received (state %x, se_cmd %p)\n", vha->vp_idx,
3411 status, cmd->state, se_cmd);
3412 break;
3413
3414 case CTIO_SRR_RECEIVED:
3415 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3416 "qla_target(%d): CTIO with SRR_RECEIVED"
3417 " status %x received (state %x, se_cmd %p)\n",
3418 vha->vp_idx, status, cmd->state, se_cmd);
3419 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3420 break;
3421 else
3422 return;
3423
3424 case CTIO_DIF_ERROR: {
3425 struct ctio_crc_from_fw *crc =
3426 (struct ctio_crc_from_fw *)ctio;
3427 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3428 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3429 vha->vp_idx, status, cmd->state, se_cmd,
3430 *((u64 *)&crc->actual_dif[0]),
3431 *((u64 *)&crc->expected_dif[0]));
3432
3433 if (qlt_handle_dif_error(vha, cmd, ctio)) {
3434 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3435 /* scsi Write/xfer rdy complete */
3436 goto skip_term;
3437 } else {
3438 /* scsi read/xmit respond complete
3439 * call handle dif to send scsi status
3440 * rather than terminate exchange.
3441 */
3442 cmd->state = QLA_TGT_STATE_PROCESSED;
3443 ha->tgt.tgt_ops->handle_dif_err(cmd);
3444 return;
3445 }
3446 } else {
3447 /* Need to generate a SCSI good completion.
3448 * because FW did not send scsi status.
3449 */
3450 status = 0;
3451 goto skip_term;
3452 }
3453 break;
3454 }
3455 default:
3456 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3457 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3458 vha->vp_idx, status, cmd->state, se_cmd);
3459 break;
3460 }
3461
3462
3463 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3464 * cmd is already aborted/terminated, we don't
3465 * need to terminate again. The exchange is already
3466 * cleaned up/freed at FW level. Just cleanup at driver
3467 * level.
3468 */
3469 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3470 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3471 cmd->cmd_flags |= BIT_13;
3472 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3473 return;
3474 }
3475 }
3476 skip_term:
3477
3478 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3479 cmd->cmd_flags |= BIT_12;
3480 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3481 cmd->state = QLA_TGT_STATE_DATA_IN;
3482
3483 if (status == CTIO_SUCCESS)
3484 cmd->write_data_transferred = 1;
3485
3486 ha->tgt.tgt_ops->handle_data(cmd);
3487 return;
3488 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3489 cmd->cmd_flags |= BIT_18;
3490 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3491 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3492 } else {
3493 cmd->cmd_flags |= BIT_19;
3494 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3495 "qla_target(%d): A command in state (%d) should "
3496 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3497 }
3498
3499 if (unlikely(status != CTIO_SUCCESS) &&
3500 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3501 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3502 dump_stack();
3503 }
3504
3505 ha->tgt.tgt_ops->free_cmd(cmd);
3506 }
3507
qlt_get_fcp_task_attr(struct scsi_qla_host * vha,uint8_t task_codes)3508 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3509 uint8_t task_codes)
3510 {
3511 int fcp_task_attr;
3512
3513 switch (task_codes) {
3514 case ATIO_SIMPLE_QUEUE:
3515 fcp_task_attr = TCM_SIMPLE_TAG;
3516 break;
3517 case ATIO_HEAD_OF_QUEUE:
3518 fcp_task_attr = TCM_HEAD_TAG;
3519 break;
3520 case ATIO_ORDERED_QUEUE:
3521 fcp_task_attr = TCM_ORDERED_TAG;
3522 break;
3523 case ATIO_ACA_QUEUE:
3524 fcp_task_attr = TCM_ACA_TAG;
3525 break;
3526 case ATIO_UNTAGGED:
3527 fcp_task_attr = TCM_SIMPLE_TAG;
3528 break;
3529 default:
3530 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3531 "qla_target: unknown task code %x, use ORDERED instead\n",
3532 task_codes);
3533 fcp_task_attr = TCM_ORDERED_TAG;
3534 break;
3535 }
3536
3537 return fcp_task_attr;
3538 }
3539
3540 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3541 uint8_t *);
3542 /*
3543 * Process context for I/O path into tcm_qla2xxx code
3544 */
__qlt_do_work(struct qla_tgt_cmd * cmd)3545 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3546 {
3547 scsi_qla_host_t *vha = cmd->vha;
3548 struct qla_hw_data *ha = vha->hw;
3549 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3550 struct qla_tgt_sess *sess = cmd->sess;
3551 struct atio_from_isp *atio = &cmd->atio;
3552 unsigned char *cdb;
3553 unsigned long flags;
3554 uint32_t data_length;
3555 int ret, fcp_task_attr, data_dir, bidi = 0;
3556
3557 cmd->cmd_in_wq = 0;
3558 cmd->cmd_flags |= BIT_1;
3559 if (tgt->tgt_stop)
3560 goto out_term;
3561
3562 if (cmd->state == QLA_TGT_STATE_ABORTED) {
3563 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3564 "cmd with tag %u is aborted\n",
3565 cmd->atio.u.isp24.exchange_addr);
3566 goto out_term;
3567 }
3568
3569 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3570 cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3571 cmd->unpacked_lun = scsilun_to_int(
3572 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3573
3574 if (atio->u.isp24.fcp_cmnd.rddata &&
3575 atio->u.isp24.fcp_cmnd.wrdata) {
3576 bidi = 1;
3577 data_dir = DMA_TO_DEVICE;
3578 } else if (atio->u.isp24.fcp_cmnd.rddata)
3579 data_dir = DMA_FROM_DEVICE;
3580 else if (atio->u.isp24.fcp_cmnd.wrdata)
3581 data_dir = DMA_TO_DEVICE;
3582 else
3583 data_dir = DMA_NONE;
3584
3585 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3586 atio->u.isp24.fcp_cmnd.task_attr);
3587 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3588 &atio->u.isp24.fcp_cmnd.add_cdb[
3589 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3590
3591 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3592 fcp_task_attr, data_dir, bidi);
3593 if (ret != 0)
3594 goto out_term;
3595 /*
3596 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3597 */
3598 spin_lock_irqsave(&ha->hardware_lock, flags);
3599 ha->tgt.tgt_ops->put_sess(sess);
3600 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3601 return;
3602
3603 out_term:
3604 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3605 /*
3606 * cmd has not sent to target yet, so pass NULL as the second
3607 * argument to qlt_send_term_exchange() and free the memory here.
3608 */
3609 cmd->cmd_flags |= BIT_2;
3610 spin_lock_irqsave(&ha->hardware_lock, flags);
3611 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3612
3613 qlt_decr_num_pend_cmds(vha);
3614 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3615 ha->tgt.tgt_ops->put_sess(sess);
3616 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3617 }
3618
qlt_do_work(struct work_struct * work)3619 static void qlt_do_work(struct work_struct *work)
3620 {
3621 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3622 scsi_qla_host_t *vha = cmd->vha;
3623 unsigned long flags;
3624
3625 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3626 list_del(&cmd->cmd_list);
3627 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3628
3629 __qlt_do_work(cmd);
3630 }
3631
qlt_get_tag(scsi_qla_host_t * vha,struct qla_tgt_sess * sess,struct atio_from_isp * atio)3632 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3633 struct qla_tgt_sess *sess,
3634 struct atio_from_isp *atio)
3635 {
3636 struct se_session *se_sess = sess->se_sess;
3637 struct qla_tgt_cmd *cmd;
3638 int tag;
3639
3640 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3641 if (tag < 0)
3642 return NULL;
3643
3644 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3645 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3646
3647 memcpy(&cmd->atio, atio, sizeof(*atio));
3648 cmd->state = QLA_TGT_STATE_NEW;
3649 cmd->tgt = vha->vha_tgt.qla_tgt;
3650 qlt_incr_num_pend_cmds(vha);
3651 cmd->vha = vha;
3652 cmd->se_cmd.map_tag = tag;
3653 cmd->sess = sess;
3654 cmd->loop_id = sess->loop_id;
3655 cmd->conf_compl_supported = sess->conf_compl_supported;
3656
3657 cmd->cmd_flags = 0;
3658 cmd->jiffies_at_alloc = get_jiffies_64();
3659
3660 cmd->reset_count = vha->hw->chip_reset;
3661
3662 return cmd;
3663 }
3664
3665 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3666 uint16_t);
3667
qlt_create_sess_from_atio(struct work_struct * work)3668 static void qlt_create_sess_from_atio(struct work_struct *work)
3669 {
3670 struct qla_tgt_sess_op *op = container_of(work,
3671 struct qla_tgt_sess_op, work);
3672 scsi_qla_host_t *vha = op->vha;
3673 struct qla_hw_data *ha = vha->hw;
3674 struct qla_tgt_sess *sess;
3675 struct qla_tgt_cmd *cmd;
3676 unsigned long flags;
3677 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3678
3679 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3680 list_del(&op->cmd_list);
3681 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3682
3683 if (op->aborted) {
3684 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3685 "sess_op with tag %u is aborted\n",
3686 op->atio.u.isp24.exchange_addr);
3687 goto out_term;
3688 }
3689
3690 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3691 "qla_target(%d): Unable to find wwn login"
3692 " (s_id %x:%x:%x), trying to create it manually\n",
3693 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3694
3695 if (op->atio.u.raw.entry_count > 1) {
3696 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3697 "Dropping multy entry atio %p\n", &op->atio);
3698 goto out_term;
3699 }
3700
3701 mutex_lock(&vha->vha_tgt.tgt_mutex);
3702 sess = qlt_make_local_sess(vha, s_id);
3703 /* sess has an extra creation ref. */
3704 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3705
3706 if (!sess)
3707 goto out_term;
3708 /*
3709 * Now obtain a pre-allocated session tag using the original op->atio
3710 * packet header, and dispatch into __qlt_do_work() using the existing
3711 * process context.
3712 */
3713 cmd = qlt_get_tag(vha, sess, &op->atio);
3714 if (!cmd) {
3715 spin_lock_irqsave(&ha->hardware_lock, flags);
3716 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3717 ha->tgt.tgt_ops->put_sess(sess);
3718 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3719 kfree(op);
3720 return;
3721 }
3722 /*
3723 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3724 * the extra reference taken above by qlt_make_local_sess()
3725 */
3726 __qlt_do_work(cmd);
3727 kfree(op);
3728 return;
3729
3730 out_term:
3731 spin_lock_irqsave(&ha->hardware_lock, flags);
3732 qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3733 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3734 kfree(op);
3735
3736 }
3737
3738 /* ha->hardware_lock supposed to be held on entry */
qlt_handle_cmd_for_atio(struct scsi_qla_host * vha,struct atio_from_isp * atio)3739 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3740 struct atio_from_isp *atio)
3741 {
3742 struct qla_hw_data *ha = vha->hw;
3743 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3744 struct qla_tgt_sess *sess;
3745 struct qla_tgt_cmd *cmd;
3746
3747 if (unlikely(tgt->tgt_stop)) {
3748 ql_dbg(ql_dbg_io, vha, 0x3061,
3749 "New command while device %p is shutting down\n", tgt);
3750 return -EFAULT;
3751 }
3752
3753 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3754 if (unlikely(!sess)) {
3755 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3756 GFP_ATOMIC);
3757 if (!op)
3758 return -ENOMEM;
3759
3760 memcpy(&op->atio, atio, sizeof(*atio));
3761 op->vha = vha;
3762
3763 spin_lock(&vha->cmd_list_lock);
3764 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3765 spin_unlock(&vha->cmd_list_lock);
3766
3767 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3768 queue_work(qla_tgt_wq, &op->work);
3769 return 0;
3770 }
3771
3772 /* Another WWN used to have our s_id. Our PLOGI scheduled its
3773 * session deletion, but it's still in sess_del_work wq */
3774 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3775 ql_dbg(ql_dbg_io, vha, 0x3061,
3776 "New command while old session %p is being deleted\n",
3777 sess);
3778 return -EFAULT;
3779 }
3780
3781 /*
3782 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3783 */
3784 kref_get(&sess->se_sess->sess_kref);
3785
3786 cmd = qlt_get_tag(vha, sess, atio);
3787 if (!cmd) {
3788 ql_dbg(ql_dbg_io, vha, 0x3062,
3789 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3790 ha->tgt.tgt_ops->put_sess(sess);
3791 return -ENOMEM;
3792 }
3793
3794 cmd->cmd_in_wq = 1;
3795 cmd->cmd_flags |= BIT_0;
3796
3797 spin_lock(&vha->cmd_list_lock);
3798 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
3799 spin_unlock(&vha->cmd_list_lock);
3800
3801 INIT_WORK(&cmd->work, qlt_do_work);
3802 queue_work(qla_tgt_wq, &cmd->work);
3803 return 0;
3804
3805 }
3806
3807 /* ha->hardware_lock supposed to be held on entry */
qlt_issue_task_mgmt(struct qla_tgt_sess * sess,uint32_t lun,int fn,void * iocb,int flags)3808 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3809 int fn, void *iocb, int flags)
3810 {
3811 struct scsi_qla_host *vha = sess->vha;
3812 struct qla_hw_data *ha = vha->hw;
3813 struct qla_tgt_mgmt_cmd *mcmd;
3814 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3815 int res;
3816 uint8_t tmr_func;
3817
3818 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3819 if (!mcmd) {
3820 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3821 "qla_target(%d): Allocation of management "
3822 "command failed, some commands and their data could "
3823 "leak\n", vha->vp_idx);
3824 return -ENOMEM;
3825 }
3826 memset(mcmd, 0, sizeof(*mcmd));
3827 mcmd->sess = sess;
3828
3829 if (iocb) {
3830 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3831 sizeof(mcmd->orig_iocb.imm_ntfy));
3832 }
3833 mcmd->tmr_func = fn;
3834 mcmd->flags = flags;
3835 mcmd->reset_count = vha->hw->chip_reset;
3836
3837 switch (fn) {
3838 case QLA_TGT_CLEAR_ACA:
3839 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3840 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3841 tmr_func = TMR_CLEAR_ACA;
3842 break;
3843
3844 case QLA_TGT_TARGET_RESET:
3845 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3846 "qla_target(%d): TARGET_RESET received\n",
3847 sess->vha->vp_idx);
3848 tmr_func = TMR_TARGET_WARM_RESET;
3849 break;
3850
3851 case QLA_TGT_LUN_RESET:
3852 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3853 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3854 tmr_func = TMR_LUN_RESET;
3855 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
3856 break;
3857
3858 case QLA_TGT_CLEAR_TS:
3859 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3860 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3861 tmr_func = TMR_CLEAR_TASK_SET;
3862 break;
3863
3864 case QLA_TGT_ABORT_TS:
3865 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3866 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3867 tmr_func = TMR_ABORT_TASK_SET;
3868 break;
3869 #if 0
3870 case QLA_TGT_ABORT_ALL:
3871 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3872 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3873 sess->vha->vp_idx);
3874 tmr_func = 0;
3875 break;
3876
3877 case QLA_TGT_ABORT_ALL_SESS:
3878 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3879 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3880 sess->vha->vp_idx);
3881 tmr_func = 0;
3882 break;
3883
3884 case QLA_TGT_NEXUS_LOSS_SESS:
3885 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3886 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3887 sess->vha->vp_idx);
3888 tmr_func = 0;
3889 break;
3890
3891 case QLA_TGT_NEXUS_LOSS:
3892 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3893 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3894 tmr_func = 0;
3895 break;
3896 #endif
3897 default:
3898 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3899 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3900 sess->vha->vp_idx, fn);
3901 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3902 return -ENOSYS;
3903 }
3904
3905 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3906 if (res != 0) {
3907 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3908 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3909 sess->vha->vp_idx, res);
3910 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3911 return -EFAULT;
3912 }
3913
3914 return 0;
3915 }
3916
3917 /* ha->hardware_lock supposed to be held on entry */
qlt_handle_task_mgmt(struct scsi_qla_host * vha,void * iocb)3918 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3919 {
3920 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3921 struct qla_hw_data *ha = vha->hw;
3922 struct qla_tgt *tgt;
3923 struct qla_tgt_sess *sess;
3924 uint32_t lun, unpacked_lun;
3925 int fn;
3926
3927 tgt = vha->vha_tgt.qla_tgt;
3928
3929 lun = a->u.isp24.fcp_cmnd.lun;
3930 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3931 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3932 a->u.isp24.fcp_hdr.s_id);
3933 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3934
3935 if (!sess) {
3936 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3937 "qla_target(%d): task mgmt fn 0x%x for "
3938 "non-existant session\n", vha->vp_idx, fn);
3939 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3940 sizeof(struct atio_from_isp));
3941 }
3942
3943 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
3944 return -EFAULT;
3945
3946 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3947 }
3948
3949 /* ha->hardware_lock supposed to be held on entry */
__qlt_abort_task(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * iocb,struct qla_tgt_sess * sess)3950 static int __qlt_abort_task(struct scsi_qla_host *vha,
3951 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3952 {
3953 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3954 struct qla_hw_data *ha = vha->hw;
3955 struct qla_tgt_mgmt_cmd *mcmd;
3956 uint32_t lun, unpacked_lun;
3957 int rc;
3958
3959 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3960 if (mcmd == NULL) {
3961 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3962 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3963 vha->vp_idx, __func__);
3964 return -ENOMEM;
3965 }
3966 memset(mcmd, 0, sizeof(*mcmd));
3967
3968 mcmd->sess = sess;
3969 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3970 sizeof(mcmd->orig_iocb.imm_ntfy));
3971
3972 lun = a->u.isp24.fcp_cmnd.lun;
3973 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3974 mcmd->reset_count = vha->hw->chip_reset;
3975
3976 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3977 le16_to_cpu(iocb->u.isp2x.seq_id));
3978 if (rc != 0) {
3979 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3980 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3981 vha->vp_idx, rc);
3982 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3983 return -EFAULT;
3984 }
3985
3986 return 0;
3987 }
3988
3989 /* ha->hardware_lock supposed to be held on entry */
qlt_abort_task(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * iocb)3990 static int qlt_abort_task(struct scsi_qla_host *vha,
3991 struct imm_ntfy_from_isp *iocb)
3992 {
3993 struct qla_hw_data *ha = vha->hw;
3994 struct qla_tgt_sess *sess;
3995 int loop_id;
3996
3997 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3998
3999 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4000 if (sess == NULL) {
4001 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4002 "qla_target(%d): task abort for unexisting "
4003 "session\n", vha->vp_idx);
4004 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4005 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4006 }
4007
4008 return __qlt_abort_task(vha, iocb, sess);
4009 }
4010
qlt_logo_completion_handler(fc_port_t * fcport,int rc)4011 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4012 {
4013 if (fcport->tgt_session) {
4014 if (rc != MBS_COMMAND_COMPLETE) {
4015 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4016 "%s: se_sess %p / sess %p from"
4017 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4018 " LOGO failed: %#x\n",
4019 __func__,
4020 fcport->tgt_session->se_sess,
4021 fcport->tgt_session,
4022 fcport->port_name, fcport->loop_id,
4023 fcport->d_id.b.domain, fcport->d_id.b.area,
4024 fcport->d_id.b.al_pa, rc);
4025 }
4026
4027 fcport->tgt_session->logout_completed = 1;
4028 }
4029 }
4030
qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp * a,struct imm_ntfy_from_isp * b)4031 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a,
4032 struct imm_ntfy_from_isp *b)
4033 {
4034 struct imm_ntfy_from_isp tmp;
4035 memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp));
4036 memcpy(a, b, sizeof(struct imm_ntfy_from_isp));
4037 memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp));
4038 }
4039
4040 /*
4041 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4042 *
4043 * Schedules sessions with matching port_id/loop_id but different wwn for
4044 * deletion. Returns existing session with matching wwn if present.
4045 * Null otherwise.
4046 */
4047 static struct qla_tgt_sess *
qlt_find_sess_invalidate_other(struct qla_tgt * tgt,uint64_t wwn,port_id_t port_id,uint16_t loop_id)4048 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4049 port_id_t port_id, uint16_t loop_id)
4050 {
4051 struct qla_tgt_sess *sess = NULL, *other_sess;
4052 uint64_t other_wwn;
4053
4054 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4055
4056 other_wwn = wwn_to_u64(other_sess->port_name);
4057
4058 if (wwn == other_wwn) {
4059 WARN_ON(sess);
4060 sess = other_sess;
4061 continue;
4062 }
4063
4064 /* find other sess with nport_id collision */
4065 if (port_id.b24 == other_sess->s_id.b24) {
4066 if (loop_id != other_sess->loop_id) {
4067 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4068 "Invalidating sess %p loop_id %d wwn %llx.\n",
4069 other_sess, other_sess->loop_id, other_wwn);
4070
4071 /*
4072 * logout_on_delete is set by default, but another
4073 * session that has the same s_id/loop_id combo
4074 * might have cleared it when requested this session
4075 * deletion, so don't touch it
4076 */
4077 qlt_schedule_sess_for_deletion(other_sess, true);
4078 } else {
4079 /*
4080 * Another wwn used to have our s_id/loop_id
4081 * combo - kill the session, but don't log out
4082 */
4083 sess->logout_on_delete = 0;
4084 qlt_schedule_sess_for_deletion(other_sess,
4085 true);
4086 }
4087 continue;
4088 }
4089
4090 /* find other sess with nport handle collision */
4091 if (loop_id == other_sess->loop_id) {
4092 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4093 "Invalidating sess %p loop_id %d wwn %llx.\n",
4094 other_sess, other_sess->loop_id, other_wwn);
4095
4096 /* Same loop_id but different s_id
4097 * Ok to kill and logout */
4098 qlt_schedule_sess_for_deletion(other_sess, true);
4099 }
4100 }
4101
4102 return sess;
4103 }
4104
4105 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
abort_cmds_for_s_id(struct scsi_qla_host * vha,port_id_t * s_id)4106 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4107 {
4108 struct qla_tgt_sess_op *op;
4109 struct qla_tgt_cmd *cmd;
4110 uint32_t key;
4111 int count = 0;
4112
4113 key = (((u32)s_id->b.domain << 16) |
4114 ((u32)s_id->b.area << 8) |
4115 ((u32)s_id->b.al_pa));
4116
4117 spin_lock(&vha->cmd_list_lock);
4118 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4119 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4120 if (op_key == key) {
4121 op->aborted = true;
4122 count++;
4123 }
4124 }
4125 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4126 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4127 if (cmd_key == key) {
4128 cmd->state = QLA_TGT_STATE_ABORTED;
4129 count++;
4130 }
4131 }
4132 spin_unlock(&vha->cmd_list_lock);
4133
4134 return count;
4135 }
4136
4137 /*
4138 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4139 */
qlt_24xx_handle_els(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * iocb)4140 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4141 struct imm_ntfy_from_isp *iocb)
4142 {
4143 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4144 struct qla_hw_data *ha = vha->hw;
4145 struct qla_tgt_sess *sess = NULL;
4146 uint64_t wwn;
4147 port_id_t port_id;
4148 uint16_t loop_id;
4149 uint16_t wd3_lo;
4150 int res = 0;
4151
4152 wwn = wwn_to_u64(iocb->u.isp24.port_name);
4153
4154 port_id.b.domain = iocb->u.isp24.port_id[2];
4155 port_id.b.area = iocb->u.isp24.port_id[1];
4156 port_id.b.al_pa = iocb->u.isp24.port_id[0];
4157 port_id.b.rsvd_1 = 0;
4158
4159 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4160
4161 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4162 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4163 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4164
4165 /* res = 1 means ack at the end of thread
4166 * res = 0 means ack async/later.
4167 */
4168 switch (iocb->u.isp24.status_subcode) {
4169 case ELS_PLOGI:
4170
4171 /* Mark all stale commands in qla_tgt_wq for deletion */
4172 abort_cmds_for_s_id(vha, &port_id);
4173
4174 if (wwn)
4175 sess = qlt_find_sess_invalidate_other(tgt, wwn,
4176 port_id, loop_id);
4177
4178 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) {
4179 res = 1;
4180 break;
4181 }
4182
4183 if (sess->plogi_ack_needed) {
4184 /*
4185 * Initiator sent another PLOGI before last PLOGI could
4186 * finish. Swap plogi iocbs and terminate old one
4187 * without acking, new one will get acked when session
4188 * deletion completes.
4189 */
4190 ql_log(ql_log_warn, sess->vha, 0xf094,
4191 "sess %p received double plogi.\n", sess);
4192
4193 qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb);
4194
4195 qlt_send_term_imm_notif(vha, iocb, 1);
4196
4197 res = 0;
4198 break;
4199 }
4200
4201 res = 0;
4202
4203 /*
4204 * Save immediate Notif IOCB for Ack when sess is done
4205 * and being deleted.
4206 */
4207 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb));
4208 sess->plogi_ack_needed = 1;
4209
4210 /*
4211 * Under normal circumstances we want to release nport handle
4212 * during LOGO process to avoid nport handle leaks inside FW.
4213 * The exception is when LOGO is done while another PLOGI with
4214 * the same nport handle is waiting as might be the case here.
4215 * Note: there is always a possibily of a race where session
4216 * deletion has already started for other reasons (e.g. ACL
4217 * removal) and now PLOGI arrives:
4218 * 1. if PLOGI arrived in FW after nport handle has been freed,
4219 * FW must have assigned this PLOGI a new/same handle and we
4220 * can proceed ACK'ing it as usual when session deletion
4221 * completes.
4222 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4223 * bit reached it, the handle has now been released. We'll
4224 * get an error when we ACK this PLOGI. Nothing will be sent
4225 * back to initiator. Initiator should eventually retry
4226 * PLOGI and situation will correct itself.
4227 */
4228 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4229 (sess->s_id.b24 == port_id.b24));
4230 qlt_schedule_sess_for_deletion(sess, true);
4231 break;
4232
4233 case ELS_PRLI:
4234 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4235
4236 if (wwn)
4237 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4238 loop_id);
4239
4240 if (sess != NULL) {
4241 if (sess->deleted) {
4242 /*
4243 * Impatient initiator sent PRLI before last
4244 * PLOGI could finish. Will force him to re-try,
4245 * while last one finishes.
4246 */
4247 ql_log(ql_log_warn, sess->vha, 0xf095,
4248 "sess %p PRLI received, before plogi ack.\n",
4249 sess);
4250 qlt_send_term_imm_notif(vha, iocb, 1);
4251 res = 0;
4252 break;
4253 }
4254
4255 /*
4256 * This shouldn't happen under normal circumstances,
4257 * since we have deleted the old session during PLOGI
4258 */
4259 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4260 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4261 sess->loop_id, sess, iocb->u.isp24.nport_handle);
4262
4263 sess->local = 0;
4264 sess->loop_id = loop_id;
4265 sess->s_id = port_id;
4266
4267 if (wd3_lo & BIT_7)
4268 sess->conf_compl_supported = 1;
4269
4270 }
4271 res = 1; /* send notify ack */
4272
4273 /* Make session global (not used in fabric mode) */
4274 if (ha->current_topology != ISP_CFG_F) {
4275 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4276 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4277 qla2xxx_wake_dpc(vha);
4278 } else {
4279 /* todo: else - create sess here. */
4280 res = 1; /* send notify ack */
4281 }
4282
4283 break;
4284
4285 case ELS_LOGO:
4286 case ELS_PRLO:
4287 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4288 break;
4289 case ELS_PDISC:
4290 case ELS_ADISC:
4291 {
4292 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4293 if (tgt->link_reinit_iocb_pending) {
4294 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4295 0, 0, 0, 0, 0, 0);
4296 tgt->link_reinit_iocb_pending = 0;
4297 }
4298 res = 1; /* send notify ack */
4299 break;
4300 }
4301
4302 case ELS_FLOGI: /* should never happen */
4303 default:
4304 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4305 "qla_target(%d): Unsupported ELS command %x "
4306 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4307 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4308 break;
4309 }
4310
4311 return res;
4312 }
4313
qlt_set_data_offset(struct qla_tgt_cmd * cmd,uint32_t offset)4314 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4315 {
4316 #if 1
4317 /*
4318 * FIXME: Reject non zero SRR relative offset until we can test
4319 * this code properly.
4320 */
4321 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4322 return -1;
4323 #else
4324 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4325 size_t first_offset = 0, rem_offset = offset, tmp = 0;
4326 int i, sg_srr_cnt, bufflen = 0;
4327
4328 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4329 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4330 "cmd->sg_cnt: %u, direction: %d\n",
4331 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4332
4333 if (!cmd->sg || !cmd->sg_cnt) {
4334 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4335 "Missing cmd->sg or zero cmd->sg_cnt in"
4336 " qla_tgt_set_data_offset\n");
4337 return -EINVAL;
4338 }
4339 /*
4340 * Walk the current cmd->sg list until we locate the new sg_srr_start
4341 */
4342 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4343 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4344 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4345 i, sg, sg_page(sg), sg->length, sg->offset);
4346
4347 if ((sg->length + tmp) > offset) {
4348 first_offset = rem_offset;
4349 sg_srr_start = sg;
4350 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4351 "Found matching sg[%d], using %p as sg_srr_start, "
4352 "and using first_offset: %zu\n", i, sg,
4353 first_offset);
4354 break;
4355 }
4356 tmp += sg->length;
4357 rem_offset -= sg->length;
4358 }
4359
4360 if (!sg_srr_start) {
4361 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4362 "Unable to locate sg_srr_start for offset: %u\n", offset);
4363 return -EINVAL;
4364 }
4365 sg_srr_cnt = (cmd->sg_cnt - i);
4366
4367 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4368 if (!sg_srr) {
4369 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4370 "Unable to allocate sgp\n");
4371 return -ENOMEM;
4372 }
4373 sg_init_table(sg_srr, sg_srr_cnt);
4374 sgp = &sg_srr[0];
4375 /*
4376 * Walk the remaining list for sg_srr_start, mapping to the newly
4377 * allocated sg_srr taking first_offset into account.
4378 */
4379 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4380 if (first_offset) {
4381 sg_set_page(sgp, sg_page(sg),
4382 (sg->length - first_offset), first_offset);
4383 first_offset = 0;
4384 } else {
4385 sg_set_page(sgp, sg_page(sg), sg->length, 0);
4386 }
4387 bufflen += sgp->length;
4388
4389 sgp = sg_next(sgp);
4390 if (!sgp)
4391 break;
4392 }
4393
4394 cmd->sg = sg_srr;
4395 cmd->sg_cnt = sg_srr_cnt;
4396 cmd->bufflen = bufflen;
4397 cmd->offset += offset;
4398 cmd->free_sg = 1;
4399
4400 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4401 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4402 cmd->sg_cnt);
4403 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4404 cmd->bufflen);
4405 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4406 cmd->offset);
4407
4408 if (cmd->sg_cnt < 0)
4409 BUG();
4410
4411 if (cmd->bufflen < 0)
4412 BUG();
4413
4414 return 0;
4415 #endif
4416 }
4417
qlt_srr_adjust_data(struct qla_tgt_cmd * cmd,uint32_t srr_rel_offs,int * xmit_type)4418 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4419 uint32_t srr_rel_offs, int *xmit_type)
4420 {
4421 int res = 0, rel_offs;
4422
4423 rel_offs = srr_rel_offs - cmd->offset;
4424 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4425 srr_rel_offs, rel_offs);
4426
4427 *xmit_type = QLA_TGT_XMIT_ALL;
4428
4429 if (rel_offs < 0) {
4430 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4431 "qla_target(%d): SRR rel_offs (%d) < 0",
4432 cmd->vha->vp_idx, rel_offs);
4433 res = -1;
4434 } else if (rel_offs == cmd->bufflen)
4435 *xmit_type = QLA_TGT_XMIT_STATUS;
4436 else if (rel_offs > 0)
4437 res = qlt_set_data_offset(cmd, rel_offs);
4438
4439 return res;
4440 }
4441
4442 /* No locks, thread context */
qlt_handle_srr(struct scsi_qla_host * vha,struct qla_tgt_srr_ctio * sctio,struct qla_tgt_srr_imm * imm)4443 static void qlt_handle_srr(struct scsi_qla_host *vha,
4444 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4445 {
4446 struct imm_ntfy_from_isp *ntfy =
4447 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4448 struct qla_hw_data *ha = vha->hw;
4449 struct qla_tgt_cmd *cmd = sctio->cmd;
4450 struct se_cmd *se_cmd = &cmd->se_cmd;
4451 unsigned long flags;
4452 int xmit_type = 0, resp = 0;
4453 uint32_t offset;
4454 uint16_t srr_ui;
4455
4456 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4457 srr_ui = ntfy->u.isp24.srr_ui;
4458
4459 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4460 cmd, srr_ui);
4461
4462 switch (srr_ui) {
4463 case SRR_IU_STATUS:
4464 spin_lock_irqsave(&ha->hardware_lock, flags);
4465 qlt_send_notify_ack(vha, ntfy,
4466 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4467 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4468 xmit_type = QLA_TGT_XMIT_STATUS;
4469 resp = 1;
4470 break;
4471 case SRR_IU_DATA_IN:
4472 if (!cmd->sg || !cmd->sg_cnt) {
4473 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4474 "Unable to process SRR_IU_DATA_IN due to"
4475 " missing cmd->sg, state: %d\n", cmd->state);
4476 dump_stack();
4477 goto out_reject;
4478 }
4479 if (se_cmd->scsi_status != 0) {
4480 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4481 "Rejecting SRR_IU_DATA_IN with non GOOD "
4482 "scsi_status\n");
4483 goto out_reject;
4484 }
4485 cmd->bufflen = se_cmd->data_length;
4486
4487 if (qlt_has_data(cmd)) {
4488 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4489 goto out_reject;
4490 spin_lock_irqsave(&ha->hardware_lock, flags);
4491 qlt_send_notify_ack(vha, ntfy,
4492 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4493 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4494 resp = 1;
4495 } else {
4496 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4497 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4498 vha->vp_idx, se_cmd->tag,
4499 cmd->se_cmd.scsi_status);
4500 goto out_reject;
4501 }
4502 break;
4503 case SRR_IU_DATA_OUT:
4504 if (!cmd->sg || !cmd->sg_cnt) {
4505 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4506 "Unable to process SRR_IU_DATA_OUT due to"
4507 " missing cmd->sg\n");
4508 dump_stack();
4509 goto out_reject;
4510 }
4511 if (se_cmd->scsi_status != 0) {
4512 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4513 "Rejecting SRR_IU_DATA_OUT"
4514 " with non GOOD scsi_status\n");
4515 goto out_reject;
4516 }
4517 cmd->bufflen = se_cmd->data_length;
4518
4519 if (qlt_has_data(cmd)) {
4520 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4521 goto out_reject;
4522 spin_lock_irqsave(&ha->hardware_lock, flags);
4523 qlt_send_notify_ack(vha, ntfy,
4524 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4525 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4526 if (xmit_type & QLA_TGT_XMIT_DATA) {
4527 cmd->cmd_flags |= BIT_8;
4528 qlt_rdy_to_xfer(cmd);
4529 }
4530 } else {
4531 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4532 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4533 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4534 goto out_reject;
4535 }
4536 break;
4537 default:
4538 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4539 "qla_target(%d): Unknown srr_ui value %x",
4540 vha->vp_idx, srr_ui);
4541 goto out_reject;
4542 }
4543
4544 /* Transmit response in case of status and data-in cases */
4545 if (resp) {
4546 cmd->cmd_flags |= BIT_7;
4547 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4548 }
4549
4550 return;
4551
4552 out_reject:
4553 spin_lock_irqsave(&ha->hardware_lock, flags);
4554 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4555 NOTIFY_ACK_SRR_FLAGS_REJECT,
4556 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4557 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4558 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4559 cmd->state = QLA_TGT_STATE_DATA_IN;
4560 dump_stack();
4561 } else {
4562 cmd->cmd_flags |= BIT_9;
4563 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
4564 }
4565 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4566 }
4567
qlt_reject_free_srr_imm(struct scsi_qla_host * vha,struct qla_tgt_srr_imm * imm,int ha_locked)4568 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4569 struct qla_tgt_srr_imm *imm, int ha_locked)
4570 {
4571 struct qla_hw_data *ha = vha->hw;
4572 unsigned long flags = 0;
4573
4574 #ifndef __CHECKER__
4575 if (!ha_locked)
4576 spin_lock_irqsave(&ha->hardware_lock, flags);
4577 #endif
4578
4579 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4580 NOTIFY_ACK_SRR_FLAGS_REJECT,
4581 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4582 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4583
4584 #ifndef __CHECKER__
4585 if (!ha_locked)
4586 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4587 #endif
4588
4589 kfree(imm);
4590 }
4591
qlt_handle_srr_work(struct work_struct * work)4592 static void qlt_handle_srr_work(struct work_struct *work)
4593 {
4594 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4595 struct scsi_qla_host *vha = tgt->vha;
4596 struct qla_tgt_srr_ctio *sctio;
4597 unsigned long flags;
4598
4599 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4600 tgt);
4601
4602 restart:
4603 spin_lock_irqsave(&tgt->srr_lock, flags);
4604 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4605 struct qla_tgt_srr_imm *imm, *i, *ti;
4606 struct qla_tgt_cmd *cmd;
4607 struct se_cmd *se_cmd;
4608
4609 imm = NULL;
4610 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4611 srr_list_entry) {
4612 if (i->srr_id == sctio->srr_id) {
4613 list_del(&i->srr_list_entry);
4614 if (imm) {
4615 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4616 "qla_target(%d): There must be "
4617 "only one IMM SRR per CTIO SRR "
4618 "(IMM SRR %p, id %d, CTIO %p\n",
4619 vha->vp_idx, i, i->srr_id, sctio);
4620 qlt_reject_free_srr_imm(tgt->vha, i, 0);
4621 } else
4622 imm = i;
4623 }
4624 }
4625
4626 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4627 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4628 sctio->srr_id);
4629
4630 if (imm == NULL) {
4631 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4632 "Not found matching IMM for SRR CTIO (id %d)\n",
4633 sctio->srr_id);
4634 continue;
4635 } else
4636 list_del(&sctio->srr_list_entry);
4637
4638 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4639
4640 cmd = sctio->cmd;
4641 /*
4642 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4643 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4644 * logic..
4645 */
4646 cmd->offset = 0;
4647 if (cmd->free_sg) {
4648 kfree(cmd->sg);
4649 cmd->sg = NULL;
4650 cmd->free_sg = 0;
4651 }
4652 se_cmd = &cmd->se_cmd;
4653
4654 cmd->sg_cnt = se_cmd->t_data_nents;
4655 cmd->sg = se_cmd->t_data_sg;
4656
4657 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4658 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4659 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4660 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4661
4662 qlt_handle_srr(vha, sctio, imm);
4663
4664 kfree(imm);
4665 kfree(sctio);
4666 goto restart;
4667 }
4668 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4669 }
4670
4671 /* ha->hardware_lock supposed to be held on entry */
qlt_prepare_srr_imm(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * iocb)4672 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4673 struct imm_ntfy_from_isp *iocb)
4674 {
4675 struct qla_tgt_srr_imm *imm;
4676 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4677 struct qla_tgt_srr_ctio *sctio;
4678
4679 tgt->imm_srr_id++;
4680
4681 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4682 vha->vp_idx);
4683
4684 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4685 if (imm != NULL) {
4686 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4687
4688 /* IRQ is already OFF */
4689 spin_lock(&tgt->srr_lock);
4690 imm->srr_id = tgt->imm_srr_id;
4691 list_add_tail(&imm->srr_list_entry,
4692 &tgt->srr_imm_list);
4693 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4694 "IMM NTFY SRR %p added (id %d, ui %x)\n",
4695 imm, imm->srr_id, iocb->u.isp24.srr_ui);
4696 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4697 int found = 0;
4698 list_for_each_entry(sctio, &tgt->srr_ctio_list,
4699 srr_list_entry) {
4700 if (sctio->srr_id == imm->srr_id) {
4701 found = 1;
4702 break;
4703 }
4704 }
4705 if (found) {
4706 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4707 "Scheduling srr work\n");
4708 schedule_work(&tgt->srr_work);
4709 } else {
4710 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4711 "qla_target(%d): imm_srr_id "
4712 "== ctio_srr_id (%d), but there is no "
4713 "corresponding SRR CTIO, deleting IMM "
4714 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4715 imm);
4716 list_del(&imm->srr_list_entry);
4717
4718 kfree(imm);
4719
4720 spin_unlock(&tgt->srr_lock);
4721 goto out_reject;
4722 }
4723 }
4724 spin_unlock(&tgt->srr_lock);
4725 } else {
4726 struct qla_tgt_srr_ctio *ts;
4727
4728 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4729 "qla_target(%d): Unable to allocate SRR IMM "
4730 "entry, SRR request will be rejected\n", vha->vp_idx);
4731
4732 /* IRQ is already OFF */
4733 spin_lock(&tgt->srr_lock);
4734 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4735 srr_list_entry) {
4736 if (sctio->srr_id == tgt->imm_srr_id) {
4737 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4738 "CTIO SRR %p deleted (id %d)\n",
4739 sctio, sctio->srr_id);
4740 list_del(&sctio->srr_list_entry);
4741 qlt_send_term_exchange(vha, sctio->cmd,
4742 &sctio->cmd->atio, 1);
4743 kfree(sctio);
4744 }
4745 }
4746 spin_unlock(&tgt->srr_lock);
4747 goto out_reject;
4748 }
4749
4750 return;
4751
4752 out_reject:
4753 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4754 NOTIFY_ACK_SRR_FLAGS_REJECT,
4755 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4756 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4757 }
4758
4759 /*
4760 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4761 */
qlt_handle_imm_notify(struct scsi_qla_host * vha,struct imm_ntfy_from_isp * iocb)4762 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4763 struct imm_ntfy_from_isp *iocb)
4764 {
4765 struct qla_hw_data *ha = vha->hw;
4766 uint32_t add_flags = 0;
4767 int send_notify_ack = 1;
4768 uint16_t status;
4769
4770 status = le16_to_cpu(iocb->u.isp2x.status);
4771 switch (status) {
4772 case IMM_NTFY_LIP_RESET:
4773 {
4774 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4775 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4776 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4777 iocb->u.isp24.status_subcode);
4778
4779 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4780 send_notify_ack = 0;
4781 break;
4782 }
4783
4784 case IMM_NTFY_LIP_LINK_REINIT:
4785 {
4786 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4787 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4788 "qla_target(%d): LINK REINIT (loop %#x, "
4789 "subcode %x)\n", vha->vp_idx,
4790 le16_to_cpu(iocb->u.isp24.nport_handle),
4791 iocb->u.isp24.status_subcode);
4792 if (tgt->link_reinit_iocb_pending) {
4793 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4794 0, 0, 0, 0, 0, 0);
4795 }
4796 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4797 tgt->link_reinit_iocb_pending = 1;
4798 /*
4799 * QLogic requires to wait after LINK REINIT for possible
4800 * PDISC or ADISC ELS commands
4801 */
4802 send_notify_ack = 0;
4803 break;
4804 }
4805
4806 case IMM_NTFY_PORT_LOGOUT:
4807 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4808 "qla_target(%d): Port logout (loop "
4809 "%#x, subcode %x)\n", vha->vp_idx,
4810 le16_to_cpu(iocb->u.isp24.nport_handle),
4811 iocb->u.isp24.status_subcode);
4812
4813 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4814 send_notify_ack = 0;
4815 /* The sessions will be cleared in the callback, if needed */
4816 break;
4817
4818 case IMM_NTFY_GLBL_TPRLO:
4819 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4820 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4821 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4822 send_notify_ack = 0;
4823 /* The sessions will be cleared in the callback, if needed */
4824 break;
4825
4826 case IMM_NTFY_PORT_CONFIG:
4827 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4828 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4829 status);
4830 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4831 send_notify_ack = 0;
4832 /* The sessions will be cleared in the callback, if needed */
4833 break;
4834
4835 case IMM_NTFY_GLBL_LOGO:
4836 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4837 "qla_target(%d): Link failure detected\n",
4838 vha->vp_idx);
4839 /* I_T nexus loss */
4840 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4841 send_notify_ack = 0;
4842 break;
4843
4844 case IMM_NTFY_IOCB_OVERFLOW:
4845 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4846 "qla_target(%d): Cannot provide requested "
4847 "capability (IOCB overflowed the immediate notify "
4848 "resource count)\n", vha->vp_idx);
4849 break;
4850
4851 case IMM_NTFY_ABORT_TASK:
4852 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4853 "qla_target(%d): Abort Task (S %08x I %#x -> "
4854 "L %#x)\n", vha->vp_idx,
4855 le16_to_cpu(iocb->u.isp2x.seq_id),
4856 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4857 le16_to_cpu(iocb->u.isp2x.lun));
4858 if (qlt_abort_task(vha, iocb) == 0)
4859 send_notify_ack = 0;
4860 break;
4861
4862 case IMM_NTFY_RESOURCE:
4863 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4864 "qla_target(%d): Out of resources, host %ld\n",
4865 vha->vp_idx, vha->host_no);
4866 break;
4867
4868 case IMM_NTFY_MSG_RX:
4869 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4870 "qla_target(%d): Immediate notify task %x\n",
4871 vha->vp_idx, iocb->u.isp2x.task_flags);
4872 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4873 send_notify_ack = 0;
4874 break;
4875
4876 case IMM_NTFY_ELS:
4877 if (qlt_24xx_handle_els(vha, iocb) == 0)
4878 send_notify_ack = 0;
4879 break;
4880
4881 case IMM_NTFY_SRR:
4882 qlt_prepare_srr_imm(vha, iocb);
4883 send_notify_ack = 0;
4884 break;
4885
4886 default:
4887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4888 "qla_target(%d): Received unknown immediate "
4889 "notify status %x\n", vha->vp_idx, status);
4890 break;
4891 }
4892
4893 if (send_notify_ack)
4894 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4895 }
4896
4897 /*
4898 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4899 * This function sends busy to ISP 2xxx or 24xx.
4900 */
__qlt_send_busy(struct scsi_qla_host * vha,struct atio_from_isp * atio,uint16_t status)4901 static int __qlt_send_busy(struct scsi_qla_host *vha,
4902 struct atio_from_isp *atio, uint16_t status)
4903 {
4904 struct ctio7_to_24xx *ctio24;
4905 struct qla_hw_data *ha = vha->hw;
4906 request_t *pkt;
4907 struct qla_tgt_sess *sess = NULL;
4908
4909 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4910 atio->u.isp24.fcp_hdr.s_id);
4911 if (!sess) {
4912 qlt_send_term_exchange(vha, NULL, atio, 1);
4913 return 0;
4914 }
4915 /* Sending marker isn't necessary, since we called from ISR */
4916
4917 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4918 if (!pkt) {
4919 ql_dbg(ql_dbg_io, vha, 0x3063,
4920 "qla_target(%d): %s failed: unable to allocate "
4921 "request packet", vha->vp_idx, __func__);
4922 return -ENOMEM;
4923 }
4924
4925 pkt->entry_count = 1;
4926 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4927
4928 ctio24 = (struct ctio7_to_24xx *)pkt;
4929 ctio24->entry_type = CTIO_TYPE7;
4930 ctio24->nport_handle = sess->loop_id;
4931 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
4932 ctio24->vp_index = vha->vp_idx;
4933 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4934 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4935 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4936 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4937 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4938 cpu_to_le16(
4939 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4940 CTIO7_FLAGS_DONT_RET_CTIO);
4941 /*
4942 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4943 * if the explicit conformation is used.
4944 */
4945 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4946 ctio24->u.status1.scsi_status = cpu_to_le16(status);
4947 /* Memory Barrier */
4948 wmb();
4949 qla2x00_start_iocbs(vha, vha->req);
4950 return 0;
4951 }
4952
4953 /*
4954 * This routine is used to allocate a command for either a QFull condition
4955 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4956 * out previously.
4957 */
4958 static void
qlt_alloc_qfull_cmd(struct scsi_qla_host * vha,struct atio_from_isp * atio,uint16_t status,int qfull)4959 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4960 struct atio_from_isp *atio, uint16_t status, int qfull)
4961 {
4962 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4963 struct qla_hw_data *ha = vha->hw;
4964 struct qla_tgt_sess *sess;
4965 struct se_session *se_sess;
4966 struct qla_tgt_cmd *cmd;
4967 int tag;
4968
4969 if (unlikely(tgt->tgt_stop)) {
4970 ql_dbg(ql_dbg_io, vha, 0x300a,
4971 "New command while device %p is shutting down\n", tgt);
4972 return;
4973 }
4974
4975 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4976 vha->hw->tgt.num_qfull_cmds_dropped++;
4977 if (vha->hw->tgt.num_qfull_cmds_dropped >
4978 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4979 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4980 vha->hw->tgt.num_qfull_cmds_dropped;
4981
4982 ql_dbg(ql_dbg_io, vha, 0x3068,
4983 "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4984 vha->vp_idx, __func__,
4985 vha->hw->tgt.num_qfull_cmds_dropped);
4986
4987 qlt_chk_exch_leak_thresh_hold(vha);
4988 return;
4989 }
4990
4991 sess = ha->tgt.tgt_ops->find_sess_by_s_id
4992 (vha, atio->u.isp24.fcp_hdr.s_id);
4993 if (!sess)
4994 return;
4995
4996 se_sess = sess->se_sess;
4997
4998 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4999 if (tag < 0)
5000 return;
5001
5002 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5003 if (!cmd) {
5004 ql_dbg(ql_dbg_io, vha, 0x3009,
5005 "qla_target(%d): %s: Allocation of cmd failed\n",
5006 vha->vp_idx, __func__);
5007
5008 vha->hw->tgt.num_qfull_cmds_dropped++;
5009 if (vha->hw->tgt.num_qfull_cmds_dropped >
5010 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5011 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5012 vha->hw->tgt.num_qfull_cmds_dropped;
5013
5014 qlt_chk_exch_leak_thresh_hold(vha);
5015 return;
5016 }
5017
5018 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5019
5020 qlt_incr_num_pend_cmds(vha);
5021 INIT_LIST_HEAD(&cmd->cmd_list);
5022 memcpy(&cmd->atio, atio, sizeof(*atio));
5023
5024 cmd->tgt = vha->vha_tgt.qla_tgt;
5025 cmd->vha = vha;
5026 cmd->reset_count = vha->hw->chip_reset;
5027 cmd->q_full = 1;
5028
5029 if (qfull) {
5030 cmd->q_full = 1;
5031 /* NOTE: borrowing the state field to carry the status */
5032 cmd->state = status;
5033 } else
5034 cmd->term_exchg = 1;
5035
5036 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5037
5038 vha->hw->tgt.num_qfull_cmds_alloc++;
5039 if (vha->hw->tgt.num_qfull_cmds_alloc >
5040 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5041 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5042 vha->hw->tgt.num_qfull_cmds_alloc;
5043 }
5044
5045 int
qlt_free_qfull_cmds(struct scsi_qla_host * vha)5046 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5047 {
5048 struct qla_hw_data *ha = vha->hw;
5049 unsigned long flags;
5050 struct qla_tgt_cmd *cmd, *tcmd;
5051 struct list_head free_list;
5052 int rc = 0;
5053
5054 if (list_empty(&ha->tgt.q_full_list))
5055 return 0;
5056
5057 INIT_LIST_HEAD(&free_list);
5058
5059 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5060
5061 if (list_empty(&ha->tgt.q_full_list)) {
5062 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5063 return 0;
5064 }
5065
5066 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5067 if (cmd->q_full)
5068 /* cmd->state is a borrowed field to hold status */
5069 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5070 else if (cmd->term_exchg)
5071 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5072
5073 if (rc == -ENOMEM)
5074 break;
5075
5076 if (cmd->q_full)
5077 ql_dbg(ql_dbg_io, vha, 0x3006,
5078 "%s: busy sent for ox_id[%04x]\n", __func__,
5079 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5080 else if (cmd->term_exchg)
5081 ql_dbg(ql_dbg_io, vha, 0x3007,
5082 "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5083 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5084 else
5085 ql_dbg(ql_dbg_io, vha, 0x3008,
5086 "%s: Unexpected cmd in QFull list %p\n", __func__,
5087 cmd);
5088
5089 list_del(&cmd->cmd_list);
5090 list_add_tail(&cmd->cmd_list, &free_list);
5091
5092 /* piggy back on hardware_lock for protection */
5093 vha->hw->tgt.num_qfull_cmds_alloc--;
5094 }
5095 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5096
5097 cmd = NULL;
5098
5099 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5100 list_del(&cmd->cmd_list);
5101 /* This cmd was never sent to TCM. There is no need
5102 * to schedule free or call free_cmd
5103 */
5104 qlt_free_cmd(cmd);
5105 }
5106 return rc;
5107 }
5108
5109 static void
qlt_send_busy(struct scsi_qla_host * vha,struct atio_from_isp * atio,uint16_t status)5110 qlt_send_busy(struct scsi_qla_host *vha,
5111 struct atio_from_isp *atio, uint16_t status)
5112 {
5113 int rc = 0;
5114
5115 rc = __qlt_send_busy(vha, atio, status);
5116 if (rc == -ENOMEM)
5117 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5118 }
5119
5120 static int
qlt_chk_qfull_thresh_hold(struct scsi_qla_host * vha,struct atio_from_isp * atio)5121 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5122 struct atio_from_isp *atio)
5123 {
5124 struct qla_hw_data *ha = vha->hw;
5125 uint16_t status;
5126
5127 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5128 return 0;
5129
5130 status = temp_sam_status;
5131 qlt_send_busy(vha, atio, status);
5132 return 1;
5133 }
5134
5135 /* ha->hardware_lock supposed to be held on entry */
5136 /* called via callback from qla2xxx */
qlt_24xx_atio_pkt(struct scsi_qla_host * vha,struct atio_from_isp * atio)5137 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5138 struct atio_from_isp *atio)
5139 {
5140 struct qla_hw_data *ha = vha->hw;
5141 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5142 int rc;
5143
5144 if (unlikely(tgt == NULL)) {
5145 ql_dbg(ql_dbg_io, vha, 0x3064,
5146 "ATIO pkt, but no tgt (ha %p)", ha);
5147 return;
5148 }
5149 /*
5150 * In tgt_stop mode we also should allow all requests to pass.
5151 * Otherwise, some commands can stuck.
5152 */
5153
5154 tgt->irq_cmd_count++;
5155
5156 switch (atio->u.raw.entry_type) {
5157 case ATIO_TYPE7:
5158 if (unlikely(atio->u.isp24.exchange_addr ==
5159 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5160 ql_dbg(ql_dbg_io, vha, 0x3065,
5161 "qla_target(%d): ATIO_TYPE7 "
5162 "received with UNKNOWN exchange address, "
5163 "sending QUEUE_FULL\n", vha->vp_idx);
5164 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5165 break;
5166 }
5167
5168
5169
5170 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5171 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5172 if (rc != 0) {
5173 tgt->irq_cmd_count--;
5174 return;
5175 }
5176 rc = qlt_handle_cmd_for_atio(vha, atio);
5177 } else {
5178 rc = qlt_handle_task_mgmt(vha, atio);
5179 }
5180 if (unlikely(rc != 0)) {
5181 if (rc == -ESRCH) {
5182 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5183 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5184 #else
5185 qlt_send_term_exchange(vha, NULL, atio, 1);
5186 #endif
5187 } else {
5188 if (tgt->tgt_stop) {
5189 ql_dbg(ql_dbg_tgt, vha, 0xe059,
5190 "qla_target: Unable to send "
5191 "command to target for req, "
5192 "ignoring.\n");
5193 } else {
5194 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5195 "qla_target(%d): Unable to send "
5196 "command to target, sending BUSY "
5197 "status.\n", vha->vp_idx);
5198 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5199 }
5200 }
5201 }
5202 break;
5203
5204 case IMMED_NOTIFY_TYPE:
5205 {
5206 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5207 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5208 "qla_target(%d): Received ATIO packet %x "
5209 "with error status %x\n", vha->vp_idx,
5210 atio->u.raw.entry_type,
5211 atio->u.isp2x.entry_status);
5212 break;
5213 }
5214 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5215 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5216 break;
5217 }
5218
5219 default:
5220 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5221 "qla_target(%d): Received unknown ATIO atio "
5222 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5223 break;
5224 }
5225
5226 tgt->irq_cmd_count--;
5227 }
5228
5229 /* ha->hardware_lock supposed to be held on entry */
5230 /* called via callback from qla2xxx */
qlt_response_pkt(struct scsi_qla_host * vha,response_t * pkt)5231 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5232 {
5233 struct qla_hw_data *ha = vha->hw;
5234 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5235
5236 if (unlikely(tgt == NULL)) {
5237 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5238 "qla_target(%d): Response pkt %x received, but no "
5239 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5240 return;
5241 }
5242
5243 /*
5244 * In tgt_stop mode we also should allow all requests to pass.
5245 * Otherwise, some commands can stuck.
5246 */
5247
5248 tgt->irq_cmd_count++;
5249
5250 switch (pkt->entry_type) {
5251 case CTIO_CRC2:
5252 case CTIO_TYPE7:
5253 {
5254 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5255 qlt_do_ctio_completion(vha, entry->handle,
5256 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5257 entry);
5258 break;
5259 }
5260
5261 case ACCEPT_TGT_IO_TYPE:
5262 {
5263 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5264 int rc;
5265 if (atio->u.isp2x.status !=
5266 cpu_to_le16(ATIO_CDB_VALID)) {
5267 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5268 "qla_target(%d): ATIO with error "
5269 "status %x received\n", vha->vp_idx,
5270 le16_to_cpu(atio->u.isp2x.status));
5271 break;
5272 }
5273
5274 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5275 if (rc != 0) {
5276 tgt->irq_cmd_count--;
5277 return;
5278 }
5279
5280 rc = qlt_handle_cmd_for_atio(vha, atio);
5281 if (unlikely(rc != 0)) {
5282 if (rc == -ESRCH) {
5283 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5284 qlt_send_busy(vha, atio, 0);
5285 #else
5286 qlt_send_term_exchange(vha, NULL, atio, 1);
5287 #endif
5288 } else {
5289 if (tgt->tgt_stop) {
5290 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5291 "qla_target: Unable to send "
5292 "command to target, sending TERM "
5293 "EXCHANGE for rsp\n");
5294 qlt_send_term_exchange(vha, NULL,
5295 atio, 1);
5296 } else {
5297 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5298 "qla_target(%d): Unable to send "
5299 "command to target, sending BUSY "
5300 "status\n", vha->vp_idx);
5301 qlt_send_busy(vha, atio, 0);
5302 }
5303 }
5304 }
5305 }
5306 break;
5307
5308 case CONTINUE_TGT_IO_TYPE:
5309 {
5310 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5311 qlt_do_ctio_completion(vha, entry->handle,
5312 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5313 entry);
5314 break;
5315 }
5316
5317 case CTIO_A64_TYPE:
5318 {
5319 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5320 qlt_do_ctio_completion(vha, entry->handle,
5321 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5322 entry);
5323 break;
5324 }
5325
5326 case IMMED_NOTIFY_TYPE:
5327 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5328 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5329 break;
5330
5331 case NOTIFY_ACK_TYPE:
5332 if (tgt->notify_ack_expected > 0) {
5333 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5334 ql_dbg(ql_dbg_tgt, vha, 0xe036,
5335 "NOTIFY_ACK seq %08x status %x\n",
5336 le16_to_cpu(entry->u.isp2x.seq_id),
5337 le16_to_cpu(entry->u.isp2x.status));
5338 tgt->notify_ack_expected--;
5339 if (entry->u.isp2x.status !=
5340 cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5341 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5342 "qla_target(%d): NOTIFY_ACK "
5343 "failed %x\n", vha->vp_idx,
5344 le16_to_cpu(entry->u.isp2x.status));
5345 }
5346 } else {
5347 ql_dbg(ql_dbg_tgt, vha, 0xe062,
5348 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5349 vha->vp_idx);
5350 }
5351 break;
5352
5353 case ABTS_RECV_24XX:
5354 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5355 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5356 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5357 break;
5358
5359 case ABTS_RESP_24XX:
5360 if (tgt->abts_resp_expected > 0) {
5361 struct abts_resp_from_24xx_fw *entry =
5362 (struct abts_resp_from_24xx_fw *)pkt;
5363 ql_dbg(ql_dbg_tgt, vha, 0xe038,
5364 "ABTS_RESP_24XX: compl_status %x\n",
5365 entry->compl_status);
5366 tgt->abts_resp_expected--;
5367 if (le16_to_cpu(entry->compl_status) !=
5368 ABTS_RESP_COMPL_SUCCESS) {
5369 if ((entry->error_subcode1 == 0x1E) &&
5370 (entry->error_subcode2 == 0)) {
5371 /*
5372 * We've got a race here: aborted
5373 * exchange not terminated, i.e.
5374 * response for the aborted command was
5375 * sent between the abort request was
5376 * received and processed.
5377 * Unfortunately, the firmware has a
5378 * silly requirement that all aborted
5379 * exchanges must be explicitely
5380 * terminated, otherwise it refuses to
5381 * send responses for the abort
5382 * requests. So, we have to
5383 * (re)terminate the exchange and retry
5384 * the abort response.
5385 */
5386 qlt_24xx_retry_term_exchange(vha,
5387 entry);
5388 } else
5389 ql_dbg(ql_dbg_tgt, vha, 0xe063,
5390 "qla_target(%d): ABTS_RESP_24XX "
5391 "failed %x (subcode %x:%x)",
5392 vha->vp_idx, entry->compl_status,
5393 entry->error_subcode1,
5394 entry->error_subcode2);
5395 }
5396 } else {
5397 ql_dbg(ql_dbg_tgt, vha, 0xe064,
5398 "qla_target(%d): Unexpected ABTS_RESP_24XX "
5399 "received\n", vha->vp_idx);
5400 }
5401 break;
5402
5403 default:
5404 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5405 "qla_target(%d): Received unknown response pkt "
5406 "type %x\n", vha->vp_idx, pkt->entry_type);
5407 break;
5408 }
5409
5410 tgt->irq_cmd_count--;
5411 }
5412
5413 /*
5414 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5415 */
qlt_async_event(uint16_t code,struct scsi_qla_host * vha,uint16_t * mailbox)5416 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5417 uint16_t *mailbox)
5418 {
5419 struct qla_hw_data *ha = vha->hw;
5420 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5421 int login_code;
5422
5423 if (!ha->tgt.tgt_ops)
5424 return;
5425
5426 if (unlikely(tgt == NULL)) {
5427 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5428 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5429 return;
5430 }
5431
5432 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5433 IS_QLA2100(ha))
5434 return;
5435 /*
5436 * In tgt_stop mode we also should allow all requests to pass.
5437 * Otherwise, some commands can stuck.
5438 */
5439
5440 tgt->irq_cmd_count++;
5441
5442 switch (code) {
5443 case MBA_RESET: /* Reset */
5444 case MBA_SYSTEM_ERR: /* System Error */
5445 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
5446 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
5447 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5448 "qla_target(%d): System error async event %#x "
5449 "occurred", vha->vp_idx, code);
5450 break;
5451 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
5452 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5453 break;
5454
5455 case MBA_LOOP_UP:
5456 {
5457 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5458 "qla_target(%d): Async LOOP_UP occurred "
5459 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5460 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5461 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5462 if (tgt->link_reinit_iocb_pending) {
5463 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5464 0, 0, 0, 0, 0, 0);
5465 tgt->link_reinit_iocb_pending = 0;
5466 }
5467 break;
5468 }
5469
5470 case MBA_LIP_OCCURRED:
5471 case MBA_LOOP_DOWN:
5472 case MBA_LIP_RESET:
5473 case MBA_RSCN_UPDATE:
5474 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5475 "qla_target(%d): Async event %#x occurred "
5476 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5477 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5478 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5479 break;
5480
5481 case MBA_PORT_UPDATE:
5482 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5483 "qla_target(%d): Port update async event %#x "
5484 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5485 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5486 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5487 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5488
5489 login_code = le16_to_cpu(mailbox[2]);
5490 if (login_code == 0x4)
5491 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5492 "Async MB 2: Got PLOGI Complete\n");
5493 else if (login_code == 0x7)
5494 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5495 "Async MB 2: Port Logged Out\n");
5496 break;
5497
5498 default:
5499 break;
5500 }
5501
5502 tgt->irq_cmd_count--;
5503 }
5504
qlt_get_port_database(struct scsi_qla_host * vha,uint16_t loop_id)5505 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5506 uint16_t loop_id)
5507 {
5508 fc_port_t *fcport;
5509 int rc;
5510
5511 fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5512 if (!fcport) {
5513 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5514 "qla_target(%d): Allocation of tmp FC port failed",
5515 vha->vp_idx);
5516 return NULL;
5517 }
5518
5519 fcport->loop_id = loop_id;
5520
5521 rc = qla2x00_get_port_database(vha, fcport, 0);
5522 if (rc != QLA_SUCCESS) {
5523 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5524 "qla_target(%d): Failed to retrieve fcport "
5525 "information -- get_port_database() returned %x "
5526 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5527 kfree(fcport);
5528 return NULL;
5529 }
5530
5531 return fcport;
5532 }
5533
5534 /* Must be called under tgt_mutex */
qlt_make_local_sess(struct scsi_qla_host * vha,uint8_t * s_id)5535 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5536 uint8_t *s_id)
5537 {
5538 struct qla_tgt_sess *sess = NULL;
5539 fc_port_t *fcport = NULL;
5540 int rc, global_resets;
5541 uint16_t loop_id = 0;
5542
5543 retry:
5544 global_resets =
5545 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5546
5547 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5548 if (rc != 0) {
5549 if ((s_id[0] == 0xFF) &&
5550 (s_id[1] == 0xFC)) {
5551 /*
5552 * This is Domain Controller, so it should be
5553 * OK to drop SCSI commands from it.
5554 */
5555 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5556 "Unable to find initiator with S_ID %x:%x:%x",
5557 s_id[0], s_id[1], s_id[2]);
5558 } else
5559 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
5560 "qla_target(%d): Unable to find "
5561 "initiator with S_ID %x:%x:%x",
5562 vha->vp_idx, s_id[0], s_id[1],
5563 s_id[2]);
5564 return NULL;
5565 }
5566
5567 fcport = qlt_get_port_database(vha, loop_id);
5568 if (!fcport)
5569 return NULL;
5570
5571 if (global_resets !=
5572 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5573 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5574 "qla_target(%d): global reset during session discovery "
5575 "(counter was %d, new %d), retrying", vha->vp_idx,
5576 global_resets,
5577 atomic_read(&vha->vha_tgt.
5578 qla_tgt->tgt_global_resets_count));
5579 goto retry;
5580 }
5581
5582 sess = qlt_create_sess(vha, fcport, true);
5583
5584 kfree(fcport);
5585 return sess;
5586 }
5587
qlt_abort_work(struct qla_tgt * tgt,struct qla_tgt_sess_work_param * prm)5588 static void qlt_abort_work(struct qla_tgt *tgt,
5589 struct qla_tgt_sess_work_param *prm)
5590 {
5591 struct scsi_qla_host *vha = tgt->vha;
5592 struct qla_hw_data *ha = vha->hw;
5593 struct qla_tgt_sess *sess = NULL;
5594 unsigned long flags;
5595 uint32_t be_s_id;
5596 uint8_t s_id[3];
5597 int rc;
5598
5599 spin_lock_irqsave(&ha->hardware_lock, flags);
5600
5601 if (tgt->tgt_stop)
5602 goto out_term;
5603
5604 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5605 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5606 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5607
5608 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5609 (unsigned char *)&be_s_id);
5610 if (!sess) {
5611 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5612
5613 mutex_lock(&vha->vha_tgt.tgt_mutex);
5614 sess = qlt_make_local_sess(vha, s_id);
5615 /* sess has got an extra creation ref */
5616 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5617
5618 spin_lock_irqsave(&ha->hardware_lock, flags);
5619 if (!sess)
5620 goto out_term;
5621 } else {
5622 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5623 sess = NULL;
5624 goto out_term;
5625 }
5626
5627 kref_get(&sess->se_sess->sess_kref);
5628 }
5629
5630 if (tgt->tgt_stop)
5631 goto out_term;
5632
5633 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5634 if (rc != 0)
5635 goto out_term;
5636
5637 ha->tgt.tgt_ops->put_sess(sess);
5638 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5639 return;
5640
5641 out_term:
5642 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5643 if (sess)
5644 ha->tgt.tgt_ops->put_sess(sess);
5645 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5646 }
5647
qlt_tmr_work(struct qla_tgt * tgt,struct qla_tgt_sess_work_param * prm)5648 static void qlt_tmr_work(struct qla_tgt *tgt,
5649 struct qla_tgt_sess_work_param *prm)
5650 {
5651 struct atio_from_isp *a = &prm->tm_iocb2;
5652 struct scsi_qla_host *vha = tgt->vha;
5653 struct qla_hw_data *ha = vha->hw;
5654 struct qla_tgt_sess *sess = NULL;
5655 unsigned long flags;
5656 uint8_t *s_id = NULL; /* to hide compiler warnings */
5657 int rc;
5658 uint32_t lun, unpacked_lun;
5659 int fn;
5660 void *iocb;
5661
5662 spin_lock_irqsave(&ha->hardware_lock, flags);
5663
5664 if (tgt->tgt_stop)
5665 goto out_term;
5666
5667 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5668 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5669 if (!sess) {
5670 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5671
5672 mutex_lock(&vha->vha_tgt.tgt_mutex);
5673 sess = qlt_make_local_sess(vha, s_id);
5674 /* sess has got an extra creation ref */
5675 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5676
5677 spin_lock_irqsave(&ha->hardware_lock, flags);
5678 if (!sess)
5679 goto out_term;
5680 } else {
5681 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5682 sess = NULL;
5683 goto out_term;
5684 }
5685
5686 kref_get(&sess->se_sess->sess_kref);
5687 }
5688
5689 iocb = a;
5690 lun = a->u.isp24.fcp_cmnd.lun;
5691 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5692 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5693
5694 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5695 if (rc != 0)
5696 goto out_term;
5697
5698 ha->tgt.tgt_ops->put_sess(sess);
5699 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5700 return;
5701
5702 out_term:
5703 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5704 if (sess)
5705 ha->tgt.tgt_ops->put_sess(sess);
5706 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5707 }
5708
qlt_sess_work_fn(struct work_struct * work)5709 static void qlt_sess_work_fn(struct work_struct *work)
5710 {
5711 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5712 struct scsi_qla_host *vha = tgt->vha;
5713 unsigned long flags;
5714
5715 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5716
5717 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5718 while (!list_empty(&tgt->sess_works_list)) {
5719 struct qla_tgt_sess_work_param *prm = list_entry(
5720 tgt->sess_works_list.next, typeof(*prm),
5721 sess_works_list_entry);
5722
5723 /*
5724 * This work can be scheduled on several CPUs at time, so we
5725 * must delete the entry to eliminate double processing
5726 */
5727 list_del(&prm->sess_works_list_entry);
5728
5729 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5730
5731 switch (prm->type) {
5732 case QLA_TGT_SESS_WORK_ABORT:
5733 qlt_abort_work(tgt, prm);
5734 break;
5735 case QLA_TGT_SESS_WORK_TM:
5736 qlt_tmr_work(tgt, prm);
5737 break;
5738 default:
5739 BUG_ON(1);
5740 break;
5741 }
5742
5743 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5744
5745 kfree(prm);
5746 }
5747 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5748 }
5749
5750 /* Must be called under tgt_host_action_mutex */
qlt_add_target(struct qla_hw_data * ha,struct scsi_qla_host * base_vha)5751 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5752 {
5753 struct qla_tgt *tgt;
5754
5755 if (!QLA_TGT_MODE_ENABLED())
5756 return 0;
5757
5758 if (!IS_TGT_MODE_CAPABLE(ha)) {
5759 ql_log(ql_log_warn, base_vha, 0xe070,
5760 "This adapter does not support target mode.\n");
5761 return 0;
5762 }
5763
5764 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5765 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5766
5767 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5768
5769 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5770 if (!tgt) {
5771 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5772 "Unable to allocate struct qla_tgt\n");
5773 return -ENOMEM;
5774 }
5775
5776 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5777 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5778
5779 tgt->ha = ha;
5780 tgt->vha = base_vha;
5781 init_waitqueue_head(&tgt->waitQ);
5782 INIT_LIST_HEAD(&tgt->sess_list);
5783 INIT_LIST_HEAD(&tgt->del_sess_list);
5784 INIT_DELAYED_WORK(&tgt->sess_del_work,
5785 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5786 spin_lock_init(&tgt->sess_work_lock);
5787 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5788 INIT_LIST_HEAD(&tgt->sess_works_list);
5789 spin_lock_init(&tgt->srr_lock);
5790 INIT_LIST_HEAD(&tgt->srr_ctio_list);
5791 INIT_LIST_HEAD(&tgt->srr_imm_list);
5792 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5793 atomic_set(&tgt->tgt_global_resets_count, 0);
5794
5795 base_vha->vha_tgt.qla_tgt = tgt;
5796
5797 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5798 "qla_target(%d): using 64 Bit PCI addressing",
5799 base_vha->vp_idx);
5800 tgt->tgt_enable_64bit_addr = 1;
5801 /* 3 is reserved */
5802 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5803 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5804 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5805
5806 if (base_vha->fc_vport)
5807 return 0;
5808
5809 mutex_lock(&qla_tgt_mutex);
5810 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5811 mutex_unlock(&qla_tgt_mutex);
5812
5813 return 0;
5814 }
5815
5816 /* Must be called under tgt_host_action_mutex */
qlt_remove_target(struct qla_hw_data * ha,struct scsi_qla_host * vha)5817 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5818 {
5819 if (!vha->vha_tgt.qla_tgt)
5820 return 0;
5821
5822 if (vha->fc_vport) {
5823 qlt_release(vha->vha_tgt.qla_tgt);
5824 return 0;
5825 }
5826
5827 /* free left over qfull cmds */
5828 qlt_init_term_exchange(vha);
5829
5830 mutex_lock(&qla_tgt_mutex);
5831 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5832 mutex_unlock(&qla_tgt_mutex);
5833
5834 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5835 vha->host_no, ha);
5836 qlt_release(vha->vha_tgt.qla_tgt);
5837
5838 return 0;
5839 }
5840
qlt_lport_dump(struct scsi_qla_host * vha,u64 wwpn,unsigned char * b)5841 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5842 unsigned char *b)
5843 {
5844 int i;
5845
5846 pr_debug("qla2xxx HW vha->node_name: ");
5847 for (i = 0; i < WWN_SIZE; i++)
5848 pr_debug("%02x ", vha->node_name[i]);
5849 pr_debug("\n");
5850 pr_debug("qla2xxx HW vha->port_name: ");
5851 for (i = 0; i < WWN_SIZE; i++)
5852 pr_debug("%02x ", vha->port_name[i]);
5853 pr_debug("\n");
5854
5855 pr_debug("qla2xxx passed configfs WWPN: ");
5856 put_unaligned_be64(wwpn, b);
5857 for (i = 0; i < WWN_SIZE; i++)
5858 pr_debug("%02x ", b[i]);
5859 pr_debug("\n");
5860 }
5861
5862 /**
5863 * qla_tgt_lport_register - register lport with external module
5864 *
5865 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5866 * @wwpn: Passwd FC target WWPN
5867 * @callback: lport initialization callback for tcm_qla2xxx code
5868 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5869 */
qlt_lport_register(void * target_lport_ptr,u64 phys_wwpn,u64 npiv_wwpn,u64 npiv_wwnn,int (* callback)(struct scsi_qla_host *,void *,u64,u64))5870 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5871 u64 npiv_wwpn, u64 npiv_wwnn,
5872 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5873 {
5874 struct qla_tgt *tgt;
5875 struct scsi_qla_host *vha;
5876 struct qla_hw_data *ha;
5877 struct Scsi_Host *host;
5878 unsigned long flags;
5879 int rc;
5880 u8 b[WWN_SIZE];
5881
5882 mutex_lock(&qla_tgt_mutex);
5883 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5884 vha = tgt->vha;
5885 ha = vha->hw;
5886
5887 host = vha->host;
5888 if (!host)
5889 continue;
5890
5891 if (!(host->hostt->supported_mode & MODE_TARGET))
5892 continue;
5893
5894 spin_lock_irqsave(&ha->hardware_lock, flags);
5895 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5896 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5897 host->host_no);
5898 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5899 continue;
5900 }
5901 if (tgt->tgt_stop) {
5902 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5903 host->host_no);
5904 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5905 continue;
5906 }
5907 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5908
5909 if (!scsi_host_get(host)) {
5910 ql_dbg(ql_dbg_tgt, vha, 0xe068,
5911 "Unable to scsi_host_get() for"
5912 " qla2xxx scsi_host\n");
5913 continue;
5914 }
5915 qlt_lport_dump(vha, phys_wwpn, b);
5916
5917 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5918 scsi_host_put(host);
5919 continue;
5920 }
5921 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5922 if (rc != 0)
5923 scsi_host_put(host);
5924
5925 mutex_unlock(&qla_tgt_mutex);
5926 return rc;
5927 }
5928 mutex_unlock(&qla_tgt_mutex);
5929
5930 return -ENODEV;
5931 }
5932 EXPORT_SYMBOL(qlt_lport_register);
5933
5934 /**
5935 * qla_tgt_lport_deregister - Degister lport
5936 *
5937 * @vha: Registered scsi_qla_host pointer
5938 */
qlt_lport_deregister(struct scsi_qla_host * vha)5939 void qlt_lport_deregister(struct scsi_qla_host *vha)
5940 {
5941 struct qla_hw_data *ha = vha->hw;
5942 struct Scsi_Host *sh = vha->host;
5943 /*
5944 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5945 */
5946 vha->vha_tgt.target_lport_ptr = NULL;
5947 ha->tgt.tgt_ops = NULL;
5948 /*
5949 * Release the Scsi_Host reference for the underlying qla2xxx host
5950 */
5951 scsi_host_put(sh);
5952 }
5953 EXPORT_SYMBOL(qlt_lport_deregister);
5954
5955 /* Must be called under HW lock */
qlt_set_mode(struct scsi_qla_host * vha)5956 static void qlt_set_mode(struct scsi_qla_host *vha)
5957 {
5958 struct qla_hw_data *ha = vha->hw;
5959
5960 switch (ql2x_ini_mode) {
5961 case QLA2XXX_INI_MODE_DISABLED:
5962 case QLA2XXX_INI_MODE_EXCLUSIVE:
5963 vha->host->active_mode = MODE_TARGET;
5964 break;
5965 case QLA2XXX_INI_MODE_ENABLED:
5966 vha->host->active_mode |= MODE_TARGET;
5967 break;
5968 default:
5969 break;
5970 }
5971
5972 if (ha->tgt.ini_mode_force_reverse)
5973 qla_reverse_ini_mode(vha);
5974 }
5975
5976 /* Must be called under HW lock */
qlt_clear_mode(struct scsi_qla_host * vha)5977 static void qlt_clear_mode(struct scsi_qla_host *vha)
5978 {
5979 struct qla_hw_data *ha = vha->hw;
5980
5981 switch (ql2x_ini_mode) {
5982 case QLA2XXX_INI_MODE_DISABLED:
5983 vha->host->active_mode = MODE_UNKNOWN;
5984 break;
5985 case QLA2XXX_INI_MODE_EXCLUSIVE:
5986 vha->host->active_mode = MODE_INITIATOR;
5987 break;
5988 case QLA2XXX_INI_MODE_ENABLED:
5989 vha->host->active_mode &= ~MODE_TARGET;
5990 break;
5991 default:
5992 break;
5993 }
5994
5995 if (ha->tgt.ini_mode_force_reverse)
5996 qla_reverse_ini_mode(vha);
5997 }
5998
5999 /*
6000 * qla_tgt_enable_vha - NO LOCK HELD
6001 *
6002 * host_reset, bring up w/ Target Mode Enabled
6003 */
6004 void
qlt_enable_vha(struct scsi_qla_host * vha)6005 qlt_enable_vha(struct scsi_qla_host *vha)
6006 {
6007 struct qla_hw_data *ha = vha->hw;
6008 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6009 unsigned long flags;
6010 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6011
6012 if (!tgt) {
6013 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6014 "Unable to locate qla_tgt pointer from"
6015 " struct qla_hw_data\n");
6016 dump_stack();
6017 return;
6018 }
6019
6020 spin_lock_irqsave(&ha->hardware_lock, flags);
6021 tgt->tgt_stopped = 0;
6022 qlt_set_mode(vha);
6023 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6024
6025 if (vha->vp_idx) {
6026 qla24xx_disable_vp(vha);
6027 qla24xx_enable_vp(vha);
6028 } else {
6029 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6030 qla2xxx_wake_dpc(base_vha);
6031 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6032 QLA_SUCCESS);
6033 }
6034 }
6035 EXPORT_SYMBOL(qlt_enable_vha);
6036
6037 /*
6038 * qla_tgt_disable_vha - NO LOCK HELD
6039 *
6040 * Disable Target Mode and reset the adapter
6041 */
qlt_disable_vha(struct scsi_qla_host * vha)6042 static void qlt_disable_vha(struct scsi_qla_host *vha)
6043 {
6044 struct qla_hw_data *ha = vha->hw;
6045 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6046 unsigned long flags;
6047
6048 if (!tgt) {
6049 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6050 "Unable to locate qla_tgt pointer from"
6051 " struct qla_hw_data\n");
6052 dump_stack();
6053 return;
6054 }
6055
6056 spin_lock_irqsave(&ha->hardware_lock, flags);
6057 qlt_clear_mode(vha);
6058 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6059
6060 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6061 qla2xxx_wake_dpc(vha);
6062 if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6063 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6064 "qla2x00_wait_for_hba_online() failed\n");
6065 }
6066
6067 /*
6068 * Called from qla_init.c:qla24xx_vport_create() contex to setup
6069 * the target mode specific struct scsi_qla_host and struct qla_hw_data
6070 * members.
6071 */
6072 void
qlt_vport_create(struct scsi_qla_host * vha,struct qla_hw_data * ha)6073 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6074 {
6075 if (!qla_tgt_mode_enabled(vha))
6076 return;
6077
6078 vha->vha_tgt.qla_tgt = NULL;
6079
6080 mutex_init(&vha->vha_tgt.tgt_mutex);
6081 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6082
6083 qlt_clear_mode(vha);
6084
6085 /*
6086 * NOTE: Currently the value is kept the same for <24xx and
6087 * >=24xx ISPs. If it is necessary to change it,
6088 * the check should be added for specific ISPs,
6089 * assigning the value appropriately.
6090 */
6091 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6092
6093 qlt_add_target(ha, vha);
6094 }
6095
6096 void
qlt_rff_id(struct scsi_qla_host * vha,struct ct_sns_req * ct_req)6097 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6098 {
6099 /*
6100 * FC-4 Feature bit 0 indicates target functionality to the name server.
6101 */
6102 if (qla_tgt_mode_enabled(vha)) {
6103 if (qla_ini_mode_enabled(vha))
6104 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6105 else
6106 ct_req->req.rff_id.fc4_feature = BIT_0;
6107 } else if (qla_ini_mode_enabled(vha)) {
6108 ct_req->req.rff_id.fc4_feature = BIT_1;
6109 }
6110 }
6111
6112 /*
6113 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6114 * @ha: HA context
6115 *
6116 * Beginning of ATIO ring has initialization control block already built
6117 * by nvram config routine.
6118 *
6119 * Returns 0 on success.
6120 */
6121 void
qlt_init_atio_q_entries(struct scsi_qla_host * vha)6122 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6123 {
6124 struct qla_hw_data *ha = vha->hw;
6125 uint16_t cnt;
6126 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6127
6128 if (!qla_tgt_mode_enabled(vha))
6129 return;
6130
6131 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6132 pkt->u.raw.signature = ATIO_PROCESSED;
6133 pkt++;
6134 }
6135
6136 }
6137
6138 /*
6139 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6140 * @ha: SCSI driver HA context
6141 */
6142 void
qlt_24xx_process_atio_queue(struct scsi_qla_host * vha)6143 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
6144 {
6145 struct qla_hw_data *ha = vha->hw;
6146 struct atio_from_isp *pkt;
6147 int cnt, i;
6148
6149 if (!vha->flags.online)
6150 return;
6151
6152 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6153 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6154 cnt = pkt->u.raw.entry_count;
6155
6156 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
6157
6158 for (i = 0; i < cnt; i++) {
6159 ha->tgt.atio_ring_index++;
6160 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6161 ha->tgt.atio_ring_index = 0;
6162 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6163 } else
6164 ha->tgt.atio_ring_ptr++;
6165
6166 pkt->u.raw.signature = ATIO_PROCESSED;
6167 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6168 }
6169 wmb();
6170 }
6171
6172 /* Adjust ring index */
6173 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6174 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6175 }
6176
6177 void
qlt_24xx_config_rings(struct scsi_qla_host * vha)6178 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6179 {
6180 struct qla_hw_data *ha = vha->hw;
6181 if (!QLA_TGT_MODE_ENABLED())
6182 return;
6183
6184 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6185 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6186 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6187
6188 if (IS_ATIO_MSIX_CAPABLE(ha)) {
6189 struct qla_msix_entry *msix = &ha->msix_entries[2];
6190 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6191
6192 icb->msix_atio = cpu_to_le16(msix->entry);
6193 ql_dbg(ql_dbg_init, vha, 0xf072,
6194 "Registering ICB vector 0x%x for atio que.\n",
6195 msix->entry);
6196 }
6197 }
6198
6199 void
qlt_24xx_config_nvram_stage1(struct scsi_qla_host * vha,struct nvram_24xx * nv)6200 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6201 {
6202 struct qla_hw_data *ha = vha->hw;
6203
6204 if (qla_tgt_mode_enabled(vha)) {
6205 if (!ha->tgt.saved_set) {
6206 /* We save only once */
6207 ha->tgt.saved_exchange_count = nv->exchange_count;
6208 ha->tgt.saved_firmware_options_1 =
6209 nv->firmware_options_1;
6210 ha->tgt.saved_firmware_options_2 =
6211 nv->firmware_options_2;
6212 ha->tgt.saved_firmware_options_3 =
6213 nv->firmware_options_3;
6214 ha->tgt.saved_set = 1;
6215 }
6216
6217 nv->exchange_count = cpu_to_le16(0xFFFF);
6218
6219 /* Enable target mode */
6220 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6221
6222 /* Disable ini mode, if requested */
6223 if (!qla_ini_mode_enabled(vha))
6224 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6225
6226 /* Disable Full Login after LIP */
6227 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6228 /* Enable initial LIP */
6229 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6230 if (ql2xtgt_tape_enable)
6231 /* Enable FC Tape support */
6232 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6233 else
6234 /* Disable FC Tape support */
6235 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6236
6237 /* Disable Full Login after LIP */
6238 nv->host_p &= cpu_to_le32(~BIT_10);
6239 /* Enable target PRLI control */
6240 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6241 } else {
6242 if (ha->tgt.saved_set) {
6243 nv->exchange_count = ha->tgt.saved_exchange_count;
6244 nv->firmware_options_1 =
6245 ha->tgt.saved_firmware_options_1;
6246 nv->firmware_options_2 =
6247 ha->tgt.saved_firmware_options_2;
6248 nv->firmware_options_3 =
6249 ha->tgt.saved_firmware_options_3;
6250 }
6251 return;
6252 }
6253
6254 /* out-of-order frames reassembly */
6255 nv->firmware_options_3 |= BIT_6|BIT_9;
6256
6257 if (ha->tgt.enable_class_2) {
6258 if (vha->flags.init_done)
6259 fc_host_supported_classes(vha->host) =
6260 FC_COS_CLASS2 | FC_COS_CLASS3;
6261
6262 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6263 } else {
6264 if (vha->flags.init_done)
6265 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6266
6267 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6268 }
6269 }
6270
6271 void
qlt_24xx_config_nvram_stage2(struct scsi_qla_host * vha,struct init_cb_24xx * icb)6272 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6273 struct init_cb_24xx *icb)
6274 {
6275 struct qla_hw_data *ha = vha->hw;
6276
6277 if (ha->tgt.node_name_set) {
6278 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6279 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6280 }
6281 }
6282
6283 void
qlt_81xx_config_nvram_stage1(struct scsi_qla_host * vha,struct nvram_81xx * nv)6284 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6285 {
6286 struct qla_hw_data *ha = vha->hw;
6287
6288 if (!QLA_TGT_MODE_ENABLED())
6289 return;
6290
6291 if (qla_tgt_mode_enabled(vha)) {
6292 if (!ha->tgt.saved_set) {
6293 /* We save only once */
6294 ha->tgt.saved_exchange_count = nv->exchange_count;
6295 ha->tgt.saved_firmware_options_1 =
6296 nv->firmware_options_1;
6297 ha->tgt.saved_firmware_options_2 =
6298 nv->firmware_options_2;
6299 ha->tgt.saved_firmware_options_3 =
6300 nv->firmware_options_3;
6301 ha->tgt.saved_set = 1;
6302 }
6303
6304 nv->exchange_count = cpu_to_le16(0xFFFF);
6305
6306 /* Enable target mode */
6307 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6308
6309 /* Disable ini mode, if requested */
6310 if (!qla_ini_mode_enabled(vha))
6311 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6312
6313 /* Disable Full Login after LIP */
6314 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6315 /* Enable initial LIP */
6316 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6317 if (ql2xtgt_tape_enable)
6318 /* Enable FC tape support */
6319 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6320 else
6321 /* Disable FC tape support */
6322 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6323
6324 /* Disable Full Login after LIP */
6325 nv->host_p &= cpu_to_le32(~BIT_10);
6326 /* Enable target PRLI control */
6327 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6328 } else {
6329 if (ha->tgt.saved_set) {
6330 nv->exchange_count = ha->tgt.saved_exchange_count;
6331 nv->firmware_options_1 =
6332 ha->tgt.saved_firmware_options_1;
6333 nv->firmware_options_2 =
6334 ha->tgt.saved_firmware_options_2;
6335 nv->firmware_options_3 =
6336 ha->tgt.saved_firmware_options_3;
6337 }
6338 return;
6339 }
6340
6341 /* out-of-order frames reassembly */
6342 nv->firmware_options_3 |= BIT_6|BIT_9;
6343
6344 if (ha->tgt.enable_class_2) {
6345 if (vha->flags.init_done)
6346 fc_host_supported_classes(vha->host) =
6347 FC_COS_CLASS2 | FC_COS_CLASS3;
6348
6349 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6350 } else {
6351 if (vha->flags.init_done)
6352 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6353
6354 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6355 }
6356 }
6357
6358 void
qlt_81xx_config_nvram_stage2(struct scsi_qla_host * vha,struct init_cb_81xx * icb)6359 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6360 struct init_cb_81xx *icb)
6361 {
6362 struct qla_hw_data *ha = vha->hw;
6363
6364 if (!QLA_TGT_MODE_ENABLED())
6365 return;
6366
6367 if (ha->tgt.node_name_set) {
6368 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6369 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6370 }
6371 }
6372
6373 void
qlt_83xx_iospace_config(struct qla_hw_data * ha)6374 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6375 {
6376 if (!QLA_TGT_MODE_ENABLED())
6377 return;
6378
6379 ha->msix_count += 1; /* For ATIO Q */
6380 }
6381
6382 int
qlt_24xx_process_response_error(struct scsi_qla_host * vha,struct sts_entry_24xx * pkt)6383 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6384 struct sts_entry_24xx *pkt)
6385 {
6386 switch (pkt->entry_type) {
6387 case ABTS_RECV_24XX:
6388 case ABTS_RESP_24XX:
6389 case CTIO_TYPE7:
6390 case NOTIFY_ACK_TYPE:
6391 case CTIO_CRC2:
6392 return 1;
6393 default:
6394 return 0;
6395 }
6396 }
6397
6398 void
qlt_modify_vp_config(struct scsi_qla_host * vha,struct vp_config_entry_24xx * vpmod)6399 qlt_modify_vp_config(struct scsi_qla_host *vha,
6400 struct vp_config_entry_24xx *vpmod)
6401 {
6402 if (qla_tgt_mode_enabled(vha))
6403 vpmod->options_idx1 &= ~BIT_5;
6404 /* Disable ini mode, if requested */
6405 if (!qla_ini_mode_enabled(vha))
6406 vpmod->options_idx1 &= ~BIT_4;
6407 }
6408
6409 void
qlt_probe_one_stage1(struct scsi_qla_host * base_vha,struct qla_hw_data * ha)6410 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6411 {
6412 if (!QLA_TGT_MODE_ENABLED())
6413 return;
6414
6415 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6416 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6417 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6418 } else {
6419 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6420 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6421 }
6422
6423 mutex_init(&base_vha->vha_tgt.tgt_mutex);
6424 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6425 qlt_clear_mode(base_vha);
6426 }
6427
6428 irqreturn_t
qla83xx_msix_atio_q(int irq,void * dev_id)6429 qla83xx_msix_atio_q(int irq, void *dev_id)
6430 {
6431 struct rsp_que *rsp;
6432 scsi_qla_host_t *vha;
6433 struct qla_hw_data *ha;
6434 unsigned long flags;
6435
6436 rsp = (struct rsp_que *) dev_id;
6437 ha = rsp->hw;
6438 vha = pci_get_drvdata(ha->pdev);
6439
6440 spin_lock_irqsave(&ha->hardware_lock, flags);
6441
6442 qlt_24xx_process_atio_queue(vha);
6443 qla24xx_process_response_queue(vha, rsp);
6444
6445 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6446
6447 return IRQ_HANDLED;
6448 }
6449
6450 int
qlt_mem_alloc(struct qla_hw_data * ha)6451 qlt_mem_alloc(struct qla_hw_data *ha)
6452 {
6453 if (!QLA_TGT_MODE_ENABLED())
6454 return 0;
6455
6456 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6457 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6458 if (!ha->tgt.tgt_vp_map)
6459 return -ENOMEM;
6460
6461 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6462 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6463 &ha->tgt.atio_dma, GFP_KERNEL);
6464 if (!ha->tgt.atio_ring) {
6465 kfree(ha->tgt.tgt_vp_map);
6466 return -ENOMEM;
6467 }
6468 return 0;
6469 }
6470
6471 void
qlt_mem_free(struct qla_hw_data * ha)6472 qlt_mem_free(struct qla_hw_data *ha)
6473 {
6474 if (!QLA_TGT_MODE_ENABLED())
6475 return;
6476
6477 if (ha->tgt.atio_ring) {
6478 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6479 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6480 ha->tgt.atio_dma);
6481 }
6482 kfree(ha->tgt.tgt_vp_map);
6483 }
6484
6485 /* vport_slock to be held by the caller */
6486 void
qlt_update_vp_map(struct scsi_qla_host * vha,int cmd)6487 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6488 {
6489 if (!QLA_TGT_MODE_ENABLED())
6490 return;
6491
6492 switch (cmd) {
6493 case SET_VP_IDX:
6494 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6495 break;
6496 case SET_AL_PA:
6497 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6498 break;
6499 case RESET_VP_IDX:
6500 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6501 break;
6502 case RESET_AL_PA:
6503 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6504 break;
6505 }
6506 }
6507
qlt_parse_ini_mode(void)6508 static int __init qlt_parse_ini_mode(void)
6509 {
6510 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6511 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6512 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6513 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6514 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6515 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6516 else
6517 return false;
6518
6519 return true;
6520 }
6521
qlt_init(void)6522 int __init qlt_init(void)
6523 {
6524 int ret;
6525
6526 if (!qlt_parse_ini_mode()) {
6527 ql_log(ql_log_fatal, NULL, 0xe06b,
6528 "qlt_parse_ini_mode() failed\n");
6529 return -EINVAL;
6530 }
6531
6532 if (!QLA_TGT_MODE_ENABLED())
6533 return 0;
6534
6535 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6536 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6537 qla_tgt_mgmt_cmd), 0, NULL);
6538 if (!qla_tgt_mgmt_cmd_cachep) {
6539 ql_log(ql_log_fatal, NULL, 0xe06d,
6540 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6541 return -ENOMEM;
6542 }
6543
6544 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6545 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6546 if (!qla_tgt_mgmt_cmd_mempool) {
6547 ql_log(ql_log_fatal, NULL, 0xe06e,
6548 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6549 ret = -ENOMEM;
6550 goto out_mgmt_cmd_cachep;
6551 }
6552
6553 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6554 if (!qla_tgt_wq) {
6555 ql_log(ql_log_fatal, NULL, 0xe06f,
6556 "alloc_workqueue for qla_tgt_wq failed\n");
6557 ret = -ENOMEM;
6558 goto out_cmd_mempool;
6559 }
6560 /*
6561 * Return 1 to signal that initiator-mode is being disabled
6562 */
6563 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6564
6565 out_cmd_mempool:
6566 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6567 out_mgmt_cmd_cachep:
6568 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6569 return ret;
6570 }
6571
qlt_exit(void)6572 void qlt_exit(void)
6573 {
6574 if (!QLA_TGT_MODE_ENABLED())
6575 return;
6576
6577 destroy_workqueue(qla_tgt_wq);
6578 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6579 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6580 }
6581