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[mirror_ubuntu-artful-kernel.git] / drivers / scsi / qla2xxx / qla_target.c
1 /*
2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
3 *
4 * based on qla2x00t.c code:
5 *
6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
7 * Copyright (C) 2004 - 2005 Leonid Stoljar
8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
9 * Copyright (C) 2006 - 2010 ID7 Ltd.
10 *
11 * Forward port and refactoring to modern qla2xxx and target/configfs
12 *
13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation, version 2
18 * of the License.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 */
25
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/blkdev.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/delay.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <asm/unaligned.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_tcq.h>
39 #include <target/target_core_base.h>
40 #include <target/target_core_fabric.h>
41
42 #include "qla_def.h"
43 #include "qla_target.h"
44
45 static int ql2xtgt_tape_enable;
46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
48 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
49
50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
51 module_param(qlini_mode, charp, S_IRUGO);
52 MODULE_PARM_DESC(qlini_mode,
53 "Determines when initiator mode will be enabled. Possible values: "
54 "\"exclusive\" - initiator mode will be enabled on load, "
55 "disabled on enabling target mode and then on disabling target mode "
56 "enabled back; "
57 "\"disabled\" - initiator mode will never be enabled; "
58 "\"enabled\" (default) - initiator mode will always stay enabled.");
59
60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
61
62 static int temp_sam_status = SAM_STAT_BUSY;
63
64 /*
65 * From scsi/fc/fc_fcp.h
66 */
67 enum fcp_resp_rsp_codes {
68 FCP_TMF_CMPL = 0,
69 FCP_DATA_LEN_INVALID = 1,
70 FCP_CMND_FIELDS_INVALID = 2,
71 FCP_DATA_PARAM_MISMATCH = 3,
72 FCP_TMF_REJECTED = 4,
73 FCP_TMF_FAILED = 5,
74 FCP_TMF_INVALID_LUN = 9,
75 };
76
77 /*
78 * fc_pri_ta from scsi/fc/fc_fcp.h
79 */
80 #define FCP_PTA_SIMPLE 0 /* simple task attribute */
81 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */
82 #define FCP_PTA_ORDERED 2 /* ordered task attribute */
83 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */
84 #define FCP_PTA_MASK 7 /* mask for task attribute field */
85 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */
86 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */
87
88 /*
89 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
90 * must be called under HW lock and could unlock/lock it inside.
91 * It isn't an issue, since in the current implementation on the time when
92 * those functions are called:
93 *
94 * - Either context is IRQ and only IRQ handler can modify HW data,
95 * including rings related fields,
96 *
97 * - Or access to target mode variables from struct qla_tgt doesn't
98 * cross those functions boundaries, except tgt_stop, which
99 * additionally protected by irq_cmd_count.
100 */
101 /* Predefs for callbacks handed to qla2xxx LLD */
102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
103 struct atio_from_isp *pkt, uint8_t);
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, int ul_abort);
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 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
122 struct imm_ntfy_from_isp *imm, int ha_locked);
123 /*
124 * Global Variables
125 */
126 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
127 static struct kmem_cache *qla_tgt_plogi_cachep;
128 static mempool_t *qla_tgt_mgmt_cmd_mempool;
129 static struct workqueue_struct *qla_tgt_wq;
130 static DEFINE_MUTEX(qla_tgt_mutex);
131 static LIST_HEAD(qla_tgt_glist);
132
133 /* This API intentionally takes dest as a parameter, rather than returning
134 * int value to avoid caller forgetting to issue wmb() after the store */
135 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
136 {
137 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
138 *dest = atomic_inc_return(&base_vha->generation_tick);
139 /* memory barrier */
140 wmb();
141 }
142
143 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
144 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
145 struct qla_tgt *tgt,
146 const uint8_t *port_name)
147 {
148 struct qla_tgt_sess *sess;
149
150 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
151 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
152 return sess;
153 }
154
155 return NULL;
156 }
157
158 /* Might release hw lock, then reaquire!! */
159 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
160 {
161 /* Send marker if required */
162 if (unlikely(vha->marker_needed != 0)) {
163 int rc = qla2x00_issue_marker(vha, vha_locked);
164 if (rc != QLA_SUCCESS) {
165 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
166 "qla_target(%d): issue_marker() failed\n",
167 vha->vp_idx);
168 }
169 return rc;
170 }
171 return QLA_SUCCESS;
172 }
173
174 static inline
175 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
176 uint8_t *d_id)
177 {
178 struct qla_hw_data *ha = vha->hw;
179 uint8_t vp_idx;
180
181 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
182 return NULL;
183
184 if (vha->d_id.b.al_pa == d_id[2])
185 return vha;
186
187 BUG_ON(ha->tgt.tgt_vp_map == NULL);
188 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
189 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
190 return ha->tgt.tgt_vp_map[vp_idx].vha;
191
192 return NULL;
193 }
194
195 static inline
196 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
197 uint16_t vp_idx)
198 {
199 struct qla_hw_data *ha = vha->hw;
200
201 if (vha->vp_idx == vp_idx)
202 return vha;
203
204 BUG_ON(ha->tgt.tgt_vp_map == NULL);
205 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
206 return ha->tgt.tgt_vp_map[vp_idx].vha;
207
208 return NULL;
209 }
210
211 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
212 {
213 unsigned long flags;
214
215 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
216
217 vha->hw->tgt.num_pend_cmds++;
218 if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
219 vha->qla_stats.stat_max_pend_cmds =
220 vha->hw->tgt.num_pend_cmds;
221 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
222 }
223 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
224 {
225 unsigned long flags;
226
227 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
228 vha->hw->tgt.num_pend_cmds--;
229 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
230 }
231
232 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
233 struct atio_from_isp *atio, uint8_t ha_locked)
234 {
235 ql_dbg(ql_dbg_tgt, vha, 0xe072,
236 "%s: qla_target(%d): type %x ox_id %04x\n",
237 __func__, vha->vp_idx, atio->u.raw.entry_type,
238 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
239
240 switch (atio->u.raw.entry_type) {
241 case ATIO_TYPE7:
242 {
243 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
244 atio->u.isp24.fcp_hdr.d_id);
245 if (unlikely(NULL == host)) {
246 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
247 "qla_target(%d): Received ATIO_TYPE7 "
248 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
249 atio->u.isp24.fcp_hdr.d_id[0],
250 atio->u.isp24.fcp_hdr.d_id[1],
251 atio->u.isp24.fcp_hdr.d_id[2]);
252 break;
253 }
254 qlt_24xx_atio_pkt(host, atio, ha_locked);
255 break;
256 }
257
258 case IMMED_NOTIFY_TYPE:
259 {
260 struct scsi_qla_host *host = vha;
261 struct imm_ntfy_from_isp *entry =
262 (struct imm_ntfy_from_isp *)atio;
263
264 if ((entry->u.isp24.vp_index != 0xFF) &&
265 (entry->u.isp24.nport_handle != 0xFFFF)) {
266 host = qlt_find_host_by_vp_idx(vha,
267 entry->u.isp24.vp_index);
268 if (unlikely(!host)) {
269 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
270 "qla_target(%d): Received "
271 "ATIO (IMMED_NOTIFY_TYPE) "
272 "with unknown vp_index %d\n",
273 vha->vp_idx, entry->u.isp24.vp_index);
274 break;
275 }
276 }
277 qlt_24xx_atio_pkt(host, atio, ha_locked);
278 break;
279 }
280
281 default:
282 ql_dbg(ql_dbg_tgt, vha, 0xe040,
283 "qla_target(%d): Received unknown ATIO atio "
284 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
285 break;
286 }
287
288 return false;
289 }
290
291 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
292 {
293 switch (pkt->entry_type) {
294 case CTIO_CRC2:
295 ql_dbg(ql_dbg_tgt, vha, 0xe073,
296 "qla_target(%d):%s: CRC2 Response pkt\n",
297 vha->vp_idx, __func__);
298 case CTIO_TYPE7:
299 {
300 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
301 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
302 entry->vp_index);
303 if (unlikely(!host)) {
304 ql_dbg(ql_dbg_tgt, vha, 0xe041,
305 "qla_target(%d): Response pkt (CTIO_TYPE7) "
306 "received, with unknown vp_index %d\n",
307 vha->vp_idx, entry->vp_index);
308 break;
309 }
310 qlt_response_pkt(host, pkt);
311 break;
312 }
313
314 case IMMED_NOTIFY_TYPE:
315 {
316 struct scsi_qla_host *host = vha;
317 struct imm_ntfy_from_isp *entry =
318 (struct imm_ntfy_from_isp *)pkt;
319
320 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
321 if (unlikely(!host)) {
322 ql_dbg(ql_dbg_tgt, vha, 0xe042,
323 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
324 "received, with unknown vp_index %d\n",
325 vha->vp_idx, entry->u.isp24.vp_index);
326 break;
327 }
328 qlt_response_pkt(host, pkt);
329 break;
330 }
331
332 case NOTIFY_ACK_TYPE:
333 {
334 struct scsi_qla_host *host = vha;
335 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
336
337 if (0xFF != entry->u.isp24.vp_index) {
338 host = qlt_find_host_by_vp_idx(vha,
339 entry->u.isp24.vp_index);
340 if (unlikely(!host)) {
341 ql_dbg(ql_dbg_tgt, vha, 0xe043,
342 "qla_target(%d): Response "
343 "pkt (NOTIFY_ACK_TYPE) "
344 "received, with unknown "
345 "vp_index %d\n", vha->vp_idx,
346 entry->u.isp24.vp_index);
347 break;
348 }
349 }
350 qlt_response_pkt(host, pkt);
351 break;
352 }
353
354 case ABTS_RECV_24XX:
355 {
356 struct abts_recv_from_24xx *entry =
357 (struct abts_recv_from_24xx *)pkt;
358 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
359 entry->vp_index);
360 if (unlikely(!host)) {
361 ql_dbg(ql_dbg_tgt, vha, 0xe044,
362 "qla_target(%d): Response pkt "
363 "(ABTS_RECV_24XX) received, with unknown "
364 "vp_index %d\n", vha->vp_idx, entry->vp_index);
365 break;
366 }
367 qlt_response_pkt(host, pkt);
368 break;
369 }
370
371 case ABTS_RESP_24XX:
372 {
373 struct abts_resp_to_24xx *entry =
374 (struct abts_resp_to_24xx *)pkt;
375 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
376 entry->vp_index);
377 if (unlikely(!host)) {
378 ql_dbg(ql_dbg_tgt, vha, 0xe045,
379 "qla_target(%d): Response pkt "
380 "(ABTS_RECV_24XX) received, with unknown "
381 "vp_index %d\n", vha->vp_idx, entry->vp_index);
382 break;
383 }
384 qlt_response_pkt(host, pkt);
385 break;
386 }
387
388 default:
389 qlt_response_pkt(vha, pkt);
390 break;
391 }
392
393 }
394
395 /*
396 * All qlt_plogi_ack_t operations are protected by hardware_lock
397 */
398
399 /*
400 * This is a zero-base ref-counting solution, since hardware_lock
401 * guarantees that ref_count is not modified concurrently.
402 * Upon successful return content of iocb is undefined
403 */
404 static qlt_plogi_ack_t *
405 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
406 struct imm_ntfy_from_isp *iocb)
407 {
408 qlt_plogi_ack_t *pla;
409
410 list_for_each_entry(pla, &vha->plogi_ack_list, list) {
411 if (pla->id.b24 == id->b24) {
412 qlt_send_term_imm_notif(vha, &pla->iocb, 1);
413 pla->iocb = *iocb;
414 return pla;
415 }
416 }
417
418 pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
419 if (!pla) {
420 ql_dbg(ql_dbg_async, vha, 0x5088,
421 "qla_target(%d): Allocation of plogi_ack failed\n",
422 vha->vp_idx);
423 return NULL;
424 }
425
426 pla->iocb = *iocb;
427 pla->id = *id;
428 list_add_tail(&pla->list, &vha->plogi_ack_list);
429
430 return pla;
431 }
432
433 static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla)
434 {
435 BUG_ON(!pla->ref_count);
436 pla->ref_count--;
437
438 if (pla->ref_count)
439 return;
440
441 ql_dbg(ql_dbg_async, vha, 0x5089,
442 "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
443 " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name,
444 pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1],
445 pla->iocb.u.isp24.port_id[0],
446 le16_to_cpu(pla->iocb.u.isp24.nport_handle),
447 pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id);
448 qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0);
449
450 list_del(&pla->list);
451 kmem_cache_free(qla_tgt_plogi_cachep, pla);
452 }
453
454 static void
455 qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla,
456 struct qla_tgt_sess *sess, qlt_plogi_link_t link)
457 {
458 /* Inc ref_count first because link might already be pointing at pla */
459 pla->ref_count++;
460
461 if (sess->plogi_link[link])
462 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
463
464 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
465 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
466 " s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name,
467 pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2],
468 pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0],
469 pla->ref_count);
470
471 sess->plogi_link[link] = pla;
472 }
473
474 typedef struct {
475 /* These fields must be initialized by the caller */
476 port_id_t id;
477 /*
478 * number of cmds dropped while we were waiting for
479 * initiator to ack LOGO initialize to 1 if LOGO is
480 * triggered by a command, otherwise, to 0
481 */
482 int cmd_count;
483
484 /* These fields are used by callee */
485 struct list_head list;
486 } qlt_port_logo_t;
487
488 static void
489 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
490 {
491 qlt_port_logo_t *tmp;
492 int res;
493
494 mutex_lock(&vha->vha_tgt.tgt_mutex);
495
496 list_for_each_entry(tmp, &vha->logo_list, list) {
497 if (tmp->id.b24 == logo->id.b24) {
498 tmp->cmd_count += logo->cmd_count;
499 mutex_unlock(&vha->vha_tgt.tgt_mutex);
500 return;
501 }
502 }
503
504 list_add_tail(&logo->list, &vha->logo_list);
505
506 mutex_unlock(&vha->vha_tgt.tgt_mutex);
507
508 res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
509
510 mutex_lock(&vha->vha_tgt.tgt_mutex);
511 list_del(&logo->list);
512 mutex_unlock(&vha->vha_tgt.tgt_mutex);
513
514 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
515 "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
516 logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
517 logo->cmd_count, res);
518 }
519
520 static void qlt_free_session_done(struct work_struct *work)
521 {
522 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
523 free_work);
524 struct qla_tgt *tgt = sess->tgt;
525 struct scsi_qla_host *vha = sess->vha;
526 struct qla_hw_data *ha = vha->hw;
527 unsigned long flags;
528 bool logout_started = false;
529 fc_port_t fcport;
530
531 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
532 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
533 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
534 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
535 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
536 sess->logout_on_delete, sess->keep_nport_handle,
537 sess->send_els_logo);
538
539 BUG_ON(!tgt);
540
541 if (sess->send_els_logo) {
542 qlt_port_logo_t logo;
543 logo.id = sess->s_id;
544 logo.cmd_count = 0;
545 qlt_send_first_logo(vha, &logo);
546 }
547
548 if (sess->logout_on_delete) {
549 int rc;
550
551 memset(&fcport, 0, sizeof(fcport));
552 fcport.loop_id = sess->loop_id;
553 fcport.d_id = sess->s_id;
554 memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
555 fcport.vha = vha;
556 fcport.tgt_session = sess;
557
558 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
559 if (rc != QLA_SUCCESS)
560 ql_log(ql_log_warn, vha, 0xf085,
561 "Schedule logo failed sess %p rc %d\n",
562 sess, rc);
563 else
564 logout_started = true;
565 }
566
567 /*
568 * Release the target session for FC Nexus from fabric module code.
569 */
570 if (sess->se_sess != NULL)
571 ha->tgt.tgt_ops->free_session(sess);
572
573 if (logout_started) {
574 bool traced = false;
575
576 while (!ACCESS_ONCE(sess->logout_completed)) {
577 if (!traced) {
578 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
579 "%s: waiting for sess %p logout\n",
580 __func__, sess);
581 traced = true;
582 }
583 msleep(100);
584 }
585
586 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
587 "%s: sess %p logout completed\n",
588 __func__, sess);
589 }
590
591 spin_lock_irqsave(&ha->hardware_lock, flags);
592
593 {
594 qlt_plogi_ack_t *own =
595 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
596 qlt_plogi_ack_t *con =
597 sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
598
599 if (con) {
600 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
601 "se_sess %p / sess %p port %8phC is gone,"
602 " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
603 sess->se_sess, sess, sess->port_name,
604 own ? "releasing own PLOGI" :
605 "no own PLOGI pending",
606 own ? own->ref_count : -1,
607 con->iocb.u.isp24.port_name, con->ref_count);
608 qlt_plogi_ack_unref(vha, con);
609 } else {
610 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
611 "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
612 sess->se_sess, sess, sess->port_name,
613 own ? "releasing own PLOGI" :
614 "no own PLOGI pending",
615 own ? own->ref_count : -1);
616 }
617
618 if (own)
619 qlt_plogi_ack_unref(vha, own);
620 }
621
622 list_del(&sess->sess_list_entry);
623
624 spin_unlock_irqrestore(&ha->hardware_lock, flags);
625
626 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
627 "Unregistration of sess %p finished\n", sess);
628
629 kfree(sess);
630 /*
631 * We need to protect against race, when tgt is freed before or
632 * inside wake_up()
633 */
634 tgt->sess_count--;
635 if (tgt->sess_count == 0)
636 wake_up_all(&tgt->waitQ);
637 }
638
639 /* ha->tgt.sess_lock supposed to be held on entry */
640 static void qlt_release_session(struct kref *kref)
641 {
642 struct qla_tgt_sess *sess =
643 container_of(kref, struct qla_tgt_sess, sess_kref);
644 struct scsi_qla_host *vha = sess->vha;
645
646 if (sess->se_sess)
647 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
648
649 if (!list_empty(&sess->del_list_entry))
650 list_del_init(&sess->del_list_entry);
651 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
652
653 INIT_WORK(&sess->free_work, qlt_free_session_done);
654 schedule_work(&sess->free_work);
655 }
656
657 void qlt_put_sess(struct qla_tgt_sess *sess)
658 {
659 if (!sess)
660 return;
661
662 assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
663 kref_put(&sess->sess_kref, qlt_release_session);
664 }
665 EXPORT_SYMBOL(qlt_put_sess);
666
667 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
668 {
669 struct qla_hw_data *ha = vha->hw;
670 struct qla_tgt_sess *sess = NULL;
671 uint16_t loop_id;
672 int res = 0;
673 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
674 unsigned long flags;
675
676 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
677 if (loop_id == 0xFFFF) {
678 /* Global event */
679 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
680 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
681 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
682 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
683 #if 0 /* FIXME: do we need to choose a session here? */
684 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
685 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
686 typeof(*sess), sess_list_entry);
687 switch (mcmd) {
688 case QLA_TGT_NEXUS_LOSS_SESS:
689 mcmd = QLA_TGT_NEXUS_LOSS;
690 break;
691 case QLA_TGT_ABORT_ALL_SESS:
692 mcmd = QLA_TGT_ABORT_ALL;
693 break;
694 case QLA_TGT_NEXUS_LOSS:
695 case QLA_TGT_ABORT_ALL:
696 break;
697 default:
698 ql_dbg(ql_dbg_tgt, vha, 0xe046,
699 "qla_target(%d): Not allowed "
700 "command %x in %s", vha->vp_idx,
701 mcmd, __func__);
702 sess = NULL;
703 break;
704 }
705 } else
706 sess = NULL;
707 #endif
708 } else {
709 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
710 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
711 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
712 }
713
714 ql_dbg(ql_dbg_tgt, vha, 0xe000,
715 "Using sess for qla_tgt_reset: %p\n", sess);
716 if (!sess) {
717 res = -ESRCH;
718 return res;
719 }
720
721 ql_dbg(ql_dbg_tgt, vha, 0xe047,
722 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
723 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
724 mcmd, loop_id);
725
726 return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
727 }
728
729 /* ha->tgt.sess_lock supposed to be held on entry */
730 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
731 bool immediate)
732 {
733 struct qla_tgt *tgt = sess->tgt;
734 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
735
736 if (sess->deleted) {
737 /* Upgrade to unconditional deletion in case it was temporary */
738 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
739 list_del(&sess->del_list_entry);
740 else
741 return;
742 }
743
744 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
745 "Scheduling sess %p for deletion\n", sess);
746
747 if (immediate) {
748 dev_loss_tmo = 0;
749 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
750 list_add(&sess->del_list_entry, &tgt->del_sess_list);
751 } else {
752 sess->deleted = QLA_SESS_DELETION_PENDING;
753 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
754 }
755
756 sess->expires = jiffies + dev_loss_tmo * HZ;
757
758 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
759 "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
760 " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
761 sess->vha->vp_idx, sess->port_name, sess->loop_id,
762 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
763 dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
764 sess->generation);
765
766 if (immediate)
767 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
768 else
769 schedule_delayed_work(&tgt->sess_del_work,
770 sess->expires - jiffies);
771 }
772
773 /* ha->tgt.sess_lock supposed to be held on entry */
774 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
775 {
776 struct qla_tgt_sess *sess;
777
778 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
779 qlt_schedule_sess_for_deletion(sess, true);
780
781 /* At this point tgt could be already dead */
782 }
783
784 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
785 uint16_t *loop_id)
786 {
787 struct qla_hw_data *ha = vha->hw;
788 dma_addr_t gid_list_dma;
789 struct gid_list_info *gid_list;
790 char *id_iter;
791 int res, rc, i;
792 uint16_t entries;
793
794 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
795 &gid_list_dma, GFP_KERNEL);
796 if (!gid_list) {
797 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
798 "qla_target(%d): DMA Alloc failed of %u\n",
799 vha->vp_idx, qla2x00_gid_list_size(ha));
800 return -ENOMEM;
801 }
802
803 /* Get list of logged in devices */
804 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
805 if (rc != QLA_SUCCESS) {
806 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
807 "qla_target(%d): get_id_list() failed: %x\n",
808 vha->vp_idx, rc);
809 res = -EBUSY;
810 goto out_free_id_list;
811 }
812
813 id_iter = (char *)gid_list;
814 res = -ENOENT;
815 for (i = 0; i < entries; i++) {
816 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
817 if ((gid->al_pa == s_id[2]) &&
818 (gid->area == s_id[1]) &&
819 (gid->domain == s_id[0])) {
820 *loop_id = le16_to_cpu(gid->loop_id);
821 res = 0;
822 break;
823 }
824 id_iter += ha->gid_list_info_size;
825 }
826
827 out_free_id_list:
828 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
829 gid_list, gid_list_dma);
830 return res;
831 }
832
833 /* ha->tgt.sess_lock supposed to be held on entry */
834 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
835 {
836 BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
837
838 list_del_init(&sess->del_list_entry);
839 sess->deleted = 0;
840 }
841
842 static void qlt_del_sess_work_fn(struct delayed_work *work)
843 {
844 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
845 sess_del_work);
846 struct scsi_qla_host *vha = tgt->vha;
847 struct qla_hw_data *ha = vha->hw;
848 struct qla_tgt_sess *sess;
849 unsigned long flags, elapsed;
850
851 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
852 while (!list_empty(&tgt->del_sess_list)) {
853 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
854 del_list_entry);
855 elapsed = jiffies;
856 if (time_after_eq(elapsed, sess->expires)) {
857 /* No turning back */
858 list_del_init(&sess->del_list_entry);
859 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
860
861 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
862 "Timeout: sess %p about to be deleted\n",
863 sess);
864 if (sess->se_sess)
865 ha->tgt.tgt_ops->shutdown_sess(sess);
866 qlt_put_sess(sess);
867 } else {
868 schedule_delayed_work(&tgt->sess_del_work,
869 sess->expires - elapsed);
870 break;
871 }
872 }
873 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
874 }
875
876 /*
877 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
878 * Caller must put it.
879 */
880 static struct qla_tgt_sess *qlt_create_sess(
881 struct scsi_qla_host *vha,
882 fc_port_t *fcport,
883 bool local)
884 {
885 struct qla_hw_data *ha = vha->hw;
886 struct qla_tgt_sess *sess;
887 unsigned long flags;
888
889 /* Check to avoid double sessions */
890 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
891 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
892 sess_list_entry) {
893 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
894 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
895 "Double sess %p found (s_id %x:%x:%x, "
896 "loop_id %d), updating to d_id %x:%x:%x, "
897 "loop_id %d", sess, sess->s_id.b.domain,
898 sess->s_id.b.al_pa, sess->s_id.b.area,
899 sess->loop_id, fcport->d_id.b.domain,
900 fcport->d_id.b.al_pa, fcport->d_id.b.area,
901 fcport->loop_id);
902
903 /* Cannot undelete at this point */
904 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
905 spin_unlock_irqrestore(&ha->tgt.sess_lock,
906 flags);
907 return NULL;
908 }
909
910 if (sess->deleted)
911 qlt_undelete_sess(sess);
912
913 if (!sess->se_sess) {
914 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
915 &sess->port_name[0], sess) < 0) {
916 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
917 return NULL;
918 }
919 }
920
921 kref_get(&sess->sess_kref);
922 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
923 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
924
925 if (sess->local && !local)
926 sess->local = 0;
927
928 qlt_do_generation_tick(vha, &sess->generation);
929
930 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
931
932 return sess;
933 }
934 }
935 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
936
937 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
938 if (!sess) {
939 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
940 "qla_target(%u): session allocation failed, all commands "
941 "from port %8phC will be refused", vha->vp_idx,
942 fcport->port_name);
943
944 return NULL;
945 }
946 sess->tgt = vha->vha_tgt.qla_tgt;
947 sess->vha = vha;
948 sess->s_id = fcport->d_id;
949 sess->loop_id = fcport->loop_id;
950 sess->local = local;
951 kref_init(&sess->sess_kref);
952 INIT_LIST_HEAD(&sess->del_list_entry);
953
954 /* Under normal circumstances we want to logout from firmware when
955 * session eventually ends and release corresponding nport handle.
956 * In the exception cases (e.g. when new PLOGI is waiting) corresponding
957 * code will adjust these flags as necessary. */
958 sess->logout_on_delete = 1;
959 sess->keep_nport_handle = 0;
960
961 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
962 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
963 sess, vha->vha_tgt.qla_tgt);
964
965 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
966 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
967 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
968
969 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
970 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
971 vha->vha_tgt.qla_tgt->sess_count++;
972 qlt_do_generation_tick(vha, &sess->generation);
973 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
974
975 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
976 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
977 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
978 vha->vp_idx, local ? "local " : "", fcport->port_name,
979 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
980 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
981
982 /*
983 * Determine if this fc_port->port_name is allowed to access
984 * target mode using explict NodeACLs+MappedLUNs, or using
985 * TPG demo mode. If this is successful a target mode FC nexus
986 * is created.
987 */
988 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
989 &fcport->port_name[0], sess) < 0) {
990 return NULL;
991 } else {
992 /*
993 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
994 * access across ->tgt.sess_lock reaquire.
995 */
996 kref_get(&sess->sess_kref);
997 }
998
999 return sess;
1000 }
1001
1002 /*
1003 * Called from qla2x00_reg_remote_port()
1004 */
1005 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
1006 {
1007 struct qla_hw_data *ha = vha->hw;
1008 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1009 struct qla_tgt_sess *sess;
1010 unsigned long flags;
1011
1012 if (!vha->hw->tgt.tgt_ops)
1013 return;
1014
1015 if (!tgt || (fcport->port_type != FCT_INITIATOR))
1016 return;
1017
1018 if (qla_ini_mode_enabled(vha))
1019 return;
1020
1021 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1022 if (tgt->tgt_stop) {
1023 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1024 return;
1025 }
1026 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1027 if (!sess) {
1028 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1029
1030 mutex_lock(&vha->vha_tgt.tgt_mutex);
1031 sess = qlt_create_sess(vha, fcport, false);
1032 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1033
1034 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1035 } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1036 /* Point of no return */
1037 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1038 return;
1039 } else {
1040 kref_get(&sess->sess_kref);
1041
1042 if (sess->deleted) {
1043 qlt_undelete_sess(sess);
1044
1045 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
1046 "qla_target(%u): %ssession for port %8phC "
1047 "(loop ID %d) reappeared\n", vha->vp_idx,
1048 sess->local ? "local " : "", sess->port_name,
1049 sess->loop_id);
1050
1051 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
1052 "Reappeared sess %p\n", sess);
1053 }
1054 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
1055 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
1056 }
1057
1058 if (sess && sess->local) {
1059 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
1060 "qla_target(%u): local session for "
1061 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
1062 fcport->port_name, sess->loop_id);
1063 sess->local = 0;
1064 }
1065 qlt_put_sess(sess);
1066 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1067 }
1068
1069 /*
1070 * max_gen - specifies maximum session generation
1071 * at which this deletion requestion is still valid
1072 */
1073 void
1074 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1075 {
1076 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1077 struct qla_tgt_sess *sess;
1078 unsigned long flags;
1079
1080 if (!vha->hw->tgt.tgt_ops)
1081 return;
1082
1083 if (!tgt)
1084 return;
1085
1086 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1087 if (tgt->tgt_stop) {
1088 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1089 return;
1090 }
1091 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1092 if (!sess) {
1093 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1094 return;
1095 }
1096
1097 if (max_gen - sess->generation < 0) {
1098 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1099 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1100 "Ignoring stale deletion request for se_sess %p / sess %p"
1101 " for port %8phC, req_gen %d, sess_gen %d\n",
1102 sess->se_sess, sess, sess->port_name, max_gen,
1103 sess->generation);
1104 return;
1105 }
1106
1107 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1108
1109 sess->local = 1;
1110 qlt_schedule_sess_for_deletion(sess, false);
1111 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1112 }
1113
1114 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1115 {
1116 struct qla_hw_data *ha = tgt->ha;
1117 unsigned long flags;
1118 int res;
1119 /*
1120 * We need to protect against race, when tgt is freed before or
1121 * inside wake_up()
1122 */
1123 spin_lock_irqsave(&ha->hardware_lock, flags);
1124 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1125 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
1126 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
1127 res = (tgt->sess_count == 0);
1128 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1129
1130 return res;
1131 }
1132
1133 /* Called by tcm_qla2xxx configfs code */
1134 int qlt_stop_phase1(struct qla_tgt *tgt)
1135 {
1136 struct scsi_qla_host *vha = tgt->vha;
1137 struct qla_hw_data *ha = tgt->ha;
1138 unsigned long flags;
1139
1140 mutex_lock(&qla_tgt_mutex);
1141 if (!vha->fc_vport) {
1142 struct Scsi_Host *sh = vha->host;
1143 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1144 bool npiv_vports;
1145
1146 spin_lock_irqsave(sh->host_lock, flags);
1147 npiv_vports = (fc_host->npiv_vports_inuse);
1148 spin_unlock_irqrestore(sh->host_lock, flags);
1149
1150 if (npiv_vports) {
1151 mutex_unlock(&qla_tgt_mutex);
1152 return -EPERM;
1153 }
1154 }
1155 if (tgt->tgt_stop || tgt->tgt_stopped) {
1156 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1157 "Already in tgt->tgt_stop or tgt_stopped state\n");
1158 mutex_unlock(&qla_tgt_mutex);
1159 return -EPERM;
1160 }
1161
1162 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1163 vha->host_no, vha);
1164 /*
1165 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1166 * Lock is needed, because we still can get an incoming packet.
1167 */
1168 mutex_lock(&vha->vha_tgt.tgt_mutex);
1169 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1170 tgt->tgt_stop = 1;
1171 qlt_clear_tgt_db(tgt);
1172 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1173 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1174 mutex_unlock(&qla_tgt_mutex);
1175
1176 flush_delayed_work(&tgt->sess_del_work);
1177
1178 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1179 "Waiting for sess works (tgt %p)", tgt);
1180 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1181 while (!list_empty(&tgt->sess_works_list)) {
1182 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1183 flush_scheduled_work();
1184 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1185 }
1186 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1187
1188 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1189 "Waiting for tgt %p: list_empty(sess_list)=%d "
1190 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1191 tgt->sess_count);
1192
1193 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1194
1195 /* Big hammer */
1196 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1197 qlt_disable_vha(vha);
1198
1199 /* Wait for sessions to clear out (just in case) */
1200 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1201 return 0;
1202 }
1203 EXPORT_SYMBOL(qlt_stop_phase1);
1204
1205 /* Called by tcm_qla2xxx configfs code */
1206 void qlt_stop_phase2(struct qla_tgt *tgt)
1207 {
1208 struct qla_hw_data *ha = tgt->ha;
1209 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1210 unsigned long flags;
1211
1212 if (tgt->tgt_stopped) {
1213 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1214 "Already in tgt->tgt_stopped state\n");
1215 dump_stack();
1216 return;
1217 }
1218
1219 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1220 "Waiting for %d IRQ commands to complete (tgt %p)",
1221 tgt->irq_cmd_count, tgt);
1222
1223 mutex_lock(&vha->vha_tgt.tgt_mutex);
1224 spin_lock_irqsave(&ha->hardware_lock, flags);
1225 while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1226 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1227 udelay(2);
1228 spin_lock_irqsave(&ha->hardware_lock, flags);
1229 }
1230 tgt->tgt_stop = 0;
1231 tgt->tgt_stopped = 1;
1232 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1233 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1234
1235 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1236 tgt);
1237 }
1238 EXPORT_SYMBOL(qlt_stop_phase2);
1239
1240 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1241 static void qlt_release(struct qla_tgt *tgt)
1242 {
1243 scsi_qla_host_t *vha = tgt->vha;
1244
1245 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1246 qlt_stop_phase2(tgt);
1247
1248 vha->vha_tgt.qla_tgt = NULL;
1249
1250 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1251 "Release of tgt %p finished\n", tgt);
1252
1253 kfree(tgt);
1254 }
1255
1256 /* ha->hardware_lock supposed to be held on entry */
1257 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1258 const void *param, unsigned int param_size)
1259 {
1260 struct qla_tgt_sess_work_param *prm;
1261 unsigned long flags;
1262
1263 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1264 if (!prm) {
1265 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1266 "qla_target(%d): Unable to create session "
1267 "work, command will be refused", 0);
1268 return -ENOMEM;
1269 }
1270
1271 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1272 "Scheduling work (type %d, prm %p)"
1273 " to find session for param %p (size %d, tgt %p)\n",
1274 type, prm, param, param_size, tgt);
1275
1276 prm->type = type;
1277 memcpy(&prm->tm_iocb, param, param_size);
1278
1279 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1280 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1281 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1282
1283 schedule_work(&tgt->sess_work);
1284
1285 return 0;
1286 }
1287
1288 /*
1289 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1290 */
1291 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1292 struct imm_ntfy_from_isp *ntfy,
1293 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1294 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1295 {
1296 struct qla_hw_data *ha = vha->hw;
1297 request_t *pkt;
1298 struct nack_to_isp *nack;
1299
1300 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1301
1302 /* Send marker if required */
1303 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1304 return;
1305
1306 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1307 if (!pkt) {
1308 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1309 "qla_target(%d): %s failed: unable to allocate "
1310 "request packet\n", vha->vp_idx, __func__);
1311 return;
1312 }
1313
1314 if (vha->vha_tgt.qla_tgt != NULL)
1315 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1316
1317 pkt->entry_type = NOTIFY_ACK_TYPE;
1318 pkt->entry_count = 1;
1319
1320 nack = (struct nack_to_isp *)pkt;
1321 nack->ox_id = ntfy->ox_id;
1322
1323 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1324 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1325 nack->u.isp24.flags = ntfy->u.isp24.flags &
1326 cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1327 }
1328 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1329 nack->u.isp24.status = ntfy->u.isp24.status;
1330 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1331 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1332 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1333 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1334 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1335 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1336 nack->u.isp24.srr_reject_code = srr_reject_code;
1337 nack->u.isp24.srr_reject_code_expl = srr_explan;
1338 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1339
1340 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1341 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1342 vha->vp_idx, nack->u.isp24.status);
1343
1344 /* Memory Barrier */
1345 wmb();
1346 qla2x00_start_iocbs(vha, vha->req);
1347 }
1348
1349 /*
1350 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1351 */
1352 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1353 struct abts_recv_from_24xx *abts, uint32_t status,
1354 bool ids_reversed)
1355 {
1356 struct qla_hw_data *ha = vha->hw;
1357 struct abts_resp_to_24xx *resp;
1358 uint32_t f_ctl;
1359 uint8_t *p;
1360
1361 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1362 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1363 ha, abts, status);
1364
1365 /* Send marker if required */
1366 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1367 return;
1368
1369 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1370 if (!resp) {
1371 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1372 "qla_target(%d): %s failed: unable to allocate "
1373 "request packet", vha->vp_idx, __func__);
1374 return;
1375 }
1376
1377 resp->entry_type = ABTS_RESP_24XX;
1378 resp->entry_count = 1;
1379 resp->nport_handle = abts->nport_handle;
1380 resp->vp_index = vha->vp_idx;
1381 resp->sof_type = abts->sof_type;
1382 resp->exchange_address = abts->exchange_address;
1383 resp->fcp_hdr_le = abts->fcp_hdr_le;
1384 f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1385 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1386 F_CTL_SEQ_INITIATIVE);
1387 p = (uint8_t *)&f_ctl;
1388 resp->fcp_hdr_le.f_ctl[0] = *p++;
1389 resp->fcp_hdr_le.f_ctl[1] = *p++;
1390 resp->fcp_hdr_le.f_ctl[2] = *p;
1391 if (ids_reversed) {
1392 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1393 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1394 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1395 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1396 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1397 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1398 } else {
1399 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1400 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1401 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1402 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1403 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1404 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1405 }
1406 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1407 if (status == FCP_TMF_CMPL) {
1408 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1409 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1410 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1411 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1412 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1413 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1414 } else {
1415 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1416 resp->payload.ba_rjt.reason_code =
1417 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1418 /* Other bytes are zero */
1419 }
1420
1421 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1422
1423 /* Memory Barrier */
1424 wmb();
1425 qla2x00_start_iocbs(vha, vha->req);
1426 }
1427
1428 /*
1429 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1430 */
1431 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1432 struct abts_resp_from_24xx_fw *entry)
1433 {
1434 struct ctio7_to_24xx *ctio;
1435
1436 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1437 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1438 /* Send marker if required */
1439 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1440 return;
1441
1442 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1443 if (ctio == NULL) {
1444 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1445 "qla_target(%d): %s failed: unable to allocate "
1446 "request packet\n", vha->vp_idx, __func__);
1447 return;
1448 }
1449
1450 /*
1451 * We've got on entrance firmware's response on by us generated
1452 * ABTS response. So, in it ID fields are reversed.
1453 */
1454
1455 ctio->entry_type = CTIO_TYPE7;
1456 ctio->entry_count = 1;
1457 ctio->nport_handle = entry->nport_handle;
1458 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1459 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1460 ctio->vp_index = vha->vp_idx;
1461 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1462 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1463 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1464 ctio->exchange_addr = entry->exchange_addr_to_abort;
1465 ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1466 CTIO7_FLAGS_TERMINATE);
1467 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1468
1469 /* Memory Barrier */
1470 wmb();
1471 qla2x00_start_iocbs(vha, vha->req);
1472
1473 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1474 FCP_TMF_CMPL, true);
1475 }
1476
1477 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1478 {
1479 struct qla_tgt_sess_op *op;
1480 struct qla_tgt_cmd *cmd;
1481
1482 spin_lock(&vha->cmd_list_lock);
1483
1484 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1485 if (tag == op->atio.u.isp24.exchange_addr) {
1486 op->aborted = true;
1487 spin_unlock(&vha->cmd_list_lock);
1488 return 1;
1489 }
1490 }
1491
1492 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1493 if (tag == cmd->atio.u.isp24.exchange_addr) {
1494 cmd->aborted = 1;
1495 spin_unlock(&vha->cmd_list_lock);
1496 return 1;
1497 }
1498 }
1499
1500 spin_unlock(&vha->cmd_list_lock);
1501 return 0;
1502 }
1503
1504 /* drop cmds for the given lun
1505 * XXX only looks for cmds on the port through which lun reset was recieved
1506 * XXX does not go through the list of other port (which may have cmds
1507 * for the same lun)
1508 */
1509 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1510 uint32_t lun, uint8_t *s_id)
1511 {
1512 struct qla_tgt_sess_op *op;
1513 struct qla_tgt_cmd *cmd;
1514 uint32_t key;
1515
1516 key = sid_to_key(s_id);
1517 spin_lock(&vha->cmd_list_lock);
1518 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1519 uint32_t op_key;
1520 uint32_t op_lun;
1521
1522 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1523 op_lun = scsilun_to_int(
1524 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1525 if (op_key == key && op_lun == lun)
1526 op->aborted = true;
1527 }
1528 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1529 uint32_t cmd_key;
1530 uint32_t cmd_lun;
1531
1532 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1533 cmd_lun = scsilun_to_int(
1534 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1535 if (cmd_key == key && cmd_lun == lun)
1536 cmd->aborted = 1;
1537 }
1538 spin_unlock(&vha->cmd_list_lock);
1539 }
1540
1541 /* ha->hardware_lock supposed to be held on entry */
1542 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1543 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1544 {
1545 struct qla_hw_data *ha = vha->hw;
1546 struct se_session *se_sess = sess->se_sess;
1547 struct qla_tgt_mgmt_cmd *mcmd;
1548 struct se_cmd *se_cmd;
1549 u32 lun = 0;
1550 int rc;
1551 bool found_lun = false;
1552
1553 spin_lock(&se_sess->sess_cmd_lock);
1554 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1555 struct qla_tgt_cmd *cmd =
1556 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1557 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1558 lun = cmd->unpacked_lun;
1559 found_lun = true;
1560 break;
1561 }
1562 }
1563 spin_unlock(&se_sess->sess_cmd_lock);
1564
1565 /* cmd not in LIO lists, look in qla list */
1566 if (!found_lun) {
1567 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1568 /* send TASK_ABORT response immediately */
1569 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1570 return 0;
1571 } else {
1572 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1573 "unable to find cmd in driver or LIO for tag 0x%x\n",
1574 abts->exchange_addr_to_abort);
1575 return -ENOENT;
1576 }
1577 }
1578
1579 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1580 "qla_target(%d): task abort (tag=%d)\n",
1581 vha->vp_idx, abts->exchange_addr_to_abort);
1582
1583 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1584 if (mcmd == NULL) {
1585 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1586 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1587 vha->vp_idx, __func__);
1588 return -ENOMEM;
1589 }
1590 memset(mcmd, 0, sizeof(*mcmd));
1591
1592 mcmd->sess = sess;
1593 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1594 mcmd->reset_count = vha->hw->chip_reset;
1595
1596 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1597 abts->exchange_addr_to_abort);
1598 if (rc != 0) {
1599 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1600 "qla_target(%d): tgt_ops->handle_tmr()"
1601 " failed: %d", vha->vp_idx, rc);
1602 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1603 return -EFAULT;
1604 }
1605
1606 return 0;
1607 }
1608
1609 /*
1610 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1611 */
1612 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1613 struct abts_recv_from_24xx *abts)
1614 {
1615 struct qla_hw_data *ha = vha->hw;
1616 struct qla_tgt_sess *sess;
1617 uint32_t tag = abts->exchange_addr_to_abort;
1618 uint8_t s_id[3];
1619 int rc;
1620 unsigned long flags;
1621
1622 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1623 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1624 "qla_target(%d): ABTS: Abort Sequence not "
1625 "supported\n", vha->vp_idx);
1626 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1627 return;
1628 }
1629
1630 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1631 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1632 "qla_target(%d): ABTS: Unknown Exchange "
1633 "Address received\n", vha->vp_idx);
1634 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1635 return;
1636 }
1637
1638 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1639 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1640 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1641 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1642 le32_to_cpu(abts->fcp_hdr_le.parameter));
1643
1644 s_id[0] = abts->fcp_hdr_le.s_id[2];
1645 s_id[1] = abts->fcp_hdr_le.s_id[1];
1646 s_id[2] = abts->fcp_hdr_le.s_id[0];
1647
1648 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1649 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1650 if (!sess) {
1651 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1652 "qla_target(%d): task abort for non-existant session\n",
1653 vha->vp_idx);
1654 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1655 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1656
1657 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1658
1659 if (rc != 0) {
1660 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1661 false);
1662 }
1663 return;
1664 }
1665 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1666
1667
1668 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1669 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1670 return;
1671 }
1672
1673 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1674 if (rc != 0) {
1675 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1676 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1677 vha->vp_idx, rc);
1678 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1679 return;
1680 }
1681 }
1682
1683 /*
1684 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1685 */
1686 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1687 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1688 {
1689 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1690 struct ctio7_to_24xx *ctio;
1691 uint16_t temp;
1692
1693 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1694 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1695 ha, atio, resp_code);
1696
1697 /* Send marker if required */
1698 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1699 return;
1700
1701 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1702 if (ctio == NULL) {
1703 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1704 "qla_target(%d): %s failed: unable to allocate "
1705 "request packet\n", ha->vp_idx, __func__);
1706 return;
1707 }
1708
1709 ctio->entry_type = CTIO_TYPE7;
1710 ctio->entry_count = 1;
1711 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1712 ctio->nport_handle = mcmd->sess->loop_id;
1713 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1714 ctio->vp_index = ha->vp_idx;
1715 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1716 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1717 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1718 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1719 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1720 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1721 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1722 ctio->u.status1.ox_id = cpu_to_le16(temp);
1723 ctio->u.status1.scsi_status =
1724 cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1725 ctio->u.status1.response_len = cpu_to_le16(8);
1726 ctio->u.status1.sense_data[0] = resp_code;
1727
1728 /* Memory Barrier */
1729 wmb();
1730 qla2x00_start_iocbs(ha, ha->req);
1731 }
1732
1733 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1734 {
1735 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1736 }
1737 EXPORT_SYMBOL(qlt_free_mcmd);
1738
1739 /* callback from target fabric module code */
1740 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1741 {
1742 struct scsi_qla_host *vha = mcmd->sess->vha;
1743 struct qla_hw_data *ha = vha->hw;
1744 unsigned long flags;
1745
1746 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1747 "TM response mcmd (%p) status %#x state %#x",
1748 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1749
1750 spin_lock_irqsave(&ha->hardware_lock, flags);
1751
1752 if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
1753 /*
1754 * Either the port is not online or this request was from
1755 * previous life, just abort the processing.
1756 */
1757 ql_dbg(ql_dbg_async, vha, 0xe100,
1758 "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
1759 vha->flags.online, qla2x00_reset_active(vha),
1760 mcmd->reset_count, ha->chip_reset);
1761 ha->tgt.tgt_ops->free_mcmd(mcmd);
1762 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1763 return;
1764 }
1765
1766 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1767 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1768 0, 0, 0, 0, 0, 0);
1769 else {
1770 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1771 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1772 mcmd->fc_tm_rsp, false);
1773 else
1774 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1775 mcmd->fc_tm_rsp);
1776 }
1777 /*
1778 * Make the callback for ->free_mcmd() to queue_work() and invoke
1779 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1780 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1781 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1782 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1783 * qlt_xmit_tm_rsp() returns here..
1784 */
1785 ha->tgt.tgt_ops->free_mcmd(mcmd);
1786 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1787 }
1788 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1789
1790 /* No locks */
1791 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1792 {
1793 struct qla_tgt_cmd *cmd = prm->cmd;
1794
1795 BUG_ON(cmd->sg_cnt == 0);
1796
1797 prm->sg = (struct scatterlist *)cmd->sg;
1798 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1799 cmd->sg_cnt, cmd->dma_data_direction);
1800 if (unlikely(prm->seg_cnt == 0))
1801 goto out_err;
1802
1803 prm->cmd->sg_mapped = 1;
1804
1805 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1806 /*
1807 * If greater than four sg entries then we need to allocate
1808 * the continuation entries
1809 */
1810 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1811 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1812 prm->tgt->datasegs_per_cmd,
1813 prm->tgt->datasegs_per_cont);
1814 } else {
1815 /* DIF */
1816 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1817 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1818 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1819 prm->tot_dsds = prm->seg_cnt;
1820 } else
1821 prm->tot_dsds = prm->seg_cnt;
1822
1823 if (cmd->prot_sg_cnt) {
1824 prm->prot_sg = cmd->prot_sg;
1825 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1826 cmd->prot_sg, cmd->prot_sg_cnt,
1827 cmd->dma_data_direction);
1828 if (unlikely(prm->prot_seg_cnt == 0))
1829 goto out_err;
1830
1831 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1832 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1833 /* Dif Bundling not support here */
1834 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1835 cmd->blk_sz);
1836 prm->tot_dsds += prm->prot_seg_cnt;
1837 } else
1838 prm->tot_dsds += prm->prot_seg_cnt;
1839 }
1840 }
1841
1842 return 0;
1843
1844 out_err:
1845 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1846 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1847 0, prm->cmd->sg_cnt);
1848 return -1;
1849 }
1850
1851 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1852 {
1853 struct qla_hw_data *ha = vha->hw;
1854
1855 if (!cmd->sg_mapped)
1856 return;
1857
1858 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1859 cmd->sg_mapped = 0;
1860
1861 if (cmd->prot_sg_cnt)
1862 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1863 cmd->dma_data_direction);
1864
1865 if (cmd->ctx_dsd_alloced)
1866 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1867
1868 if (cmd->ctx)
1869 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1870 }
1871
1872 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1873 uint32_t req_cnt)
1874 {
1875 uint32_t cnt, cnt_in;
1876
1877 if (vha->req->cnt < (req_cnt + 2)) {
1878 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1879 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1880
1881 if (vha->req->ring_index < cnt)
1882 vha->req->cnt = cnt - vha->req->ring_index;
1883 else
1884 vha->req->cnt = vha->req->length -
1885 (vha->req->ring_index - cnt);
1886
1887 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1888 ql_dbg(ql_dbg_io, vha, 0x305a,
1889 "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",
1890 vha->vp_idx, vha->req->ring_index,
1891 vha->req->cnt, req_cnt, cnt, cnt_in,
1892 vha->req->length);
1893 return -EAGAIN;
1894 }
1895 }
1896
1897 vha->req->cnt -= req_cnt;
1898
1899 return 0;
1900 }
1901
1902 /*
1903 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1904 */
1905 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1906 {
1907 /* Adjust ring index. */
1908 vha->req->ring_index++;
1909 if (vha->req->ring_index == vha->req->length) {
1910 vha->req->ring_index = 0;
1911 vha->req->ring_ptr = vha->req->ring;
1912 } else {
1913 vha->req->ring_ptr++;
1914 }
1915 return (cont_entry_t *)vha->req->ring_ptr;
1916 }
1917
1918 /* ha->hardware_lock supposed to be held on entry */
1919 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1920 {
1921 struct qla_hw_data *ha = vha->hw;
1922 uint32_t h;
1923
1924 h = ha->tgt.current_handle;
1925 /* always increment cmd handle */
1926 do {
1927 ++h;
1928 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1929 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1930 if (h == ha->tgt.current_handle) {
1931 ql_dbg(ql_dbg_io, vha, 0x305b,
1932 "qla_target(%d): Ran out of "
1933 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1934 h = QLA_TGT_NULL_HANDLE;
1935 break;
1936 }
1937 } while ((h == QLA_TGT_NULL_HANDLE) ||
1938 (h == QLA_TGT_SKIP_HANDLE) ||
1939 (ha->tgt.cmds[h-1] != NULL));
1940
1941 if (h != QLA_TGT_NULL_HANDLE)
1942 ha->tgt.current_handle = h;
1943
1944 return h;
1945 }
1946
1947 /* ha->hardware_lock supposed to be held on entry */
1948 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1949 struct scsi_qla_host *vha)
1950 {
1951 uint32_t h;
1952 struct ctio7_to_24xx *pkt;
1953 struct qla_hw_data *ha = vha->hw;
1954 struct atio_from_isp *atio = &prm->cmd->atio;
1955 uint16_t temp;
1956
1957 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1958 prm->pkt = pkt;
1959 memset(pkt, 0, sizeof(*pkt));
1960
1961 pkt->entry_type = CTIO_TYPE7;
1962 pkt->entry_count = (uint8_t)prm->req_cnt;
1963 pkt->vp_index = vha->vp_idx;
1964
1965 h = qlt_make_handle(vha);
1966 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1967 /*
1968 * CTIO type 7 from the firmware doesn't provide a way to
1969 * know the initiator's LOOP ID, hence we can't find
1970 * the session and, so, the command.
1971 */
1972 return -EAGAIN;
1973 } else
1974 ha->tgt.cmds[h-1] = prm->cmd;
1975
1976 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1977 pkt->nport_handle = prm->cmd->loop_id;
1978 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1979 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1980 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1981 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1982 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1983 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1984 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1985 pkt->u.status0.ox_id = cpu_to_le16(temp);
1986 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1987
1988 return 0;
1989 }
1990
1991 /*
1992 * ha->hardware_lock supposed to be held on entry. We have already made sure
1993 * that there is sufficient amount of request entries to not drop it.
1994 */
1995 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1996 struct scsi_qla_host *vha)
1997 {
1998 int cnt;
1999 uint32_t *dword_ptr;
2000 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2001
2002 /* Build continuation packets */
2003 while (prm->seg_cnt > 0) {
2004 cont_a64_entry_t *cont_pkt64 =
2005 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2006
2007 /*
2008 * Make sure that from cont_pkt64 none of
2009 * 64-bit specific fields used for 32-bit
2010 * addressing. Cast to (cont_entry_t *) for
2011 * that.
2012 */
2013
2014 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2015
2016 cont_pkt64->entry_count = 1;
2017 cont_pkt64->sys_define = 0;
2018
2019 if (enable_64bit_addressing) {
2020 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2021 dword_ptr =
2022 (uint32_t *)&cont_pkt64->dseg_0_address;
2023 } else {
2024 cont_pkt64->entry_type = CONTINUE_TYPE;
2025 dword_ptr =
2026 (uint32_t *)&((cont_entry_t *)
2027 cont_pkt64)->dseg_0_address;
2028 }
2029
2030 /* Load continuation entry data segments */
2031 for (cnt = 0;
2032 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2033 cnt++, prm->seg_cnt--) {
2034 *dword_ptr++ =
2035 cpu_to_le32(pci_dma_lo32
2036 (sg_dma_address(prm->sg)));
2037 if (enable_64bit_addressing) {
2038 *dword_ptr++ =
2039 cpu_to_le32(pci_dma_hi32
2040 (sg_dma_address
2041 (prm->sg)));
2042 }
2043 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2044
2045 prm->sg = sg_next(prm->sg);
2046 }
2047 }
2048 }
2049
2050 /*
2051 * ha->hardware_lock supposed to be held on entry. We have already made sure
2052 * that there is sufficient amount of request entries to not drop it.
2053 */
2054 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2055 struct scsi_qla_host *vha)
2056 {
2057 int cnt;
2058 uint32_t *dword_ptr;
2059 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2060 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2061
2062 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2063
2064 /* Setup packet address segment pointer */
2065 dword_ptr = pkt24->u.status0.dseg_0_address;
2066
2067 /* Set total data segment count */
2068 if (prm->seg_cnt)
2069 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2070
2071 if (prm->seg_cnt == 0) {
2072 /* No data transfer */
2073 *dword_ptr++ = 0;
2074 *dword_ptr = 0;
2075 return;
2076 }
2077
2078 /* If scatter gather */
2079
2080 /* Load command entry data segments */
2081 for (cnt = 0;
2082 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2083 cnt++, prm->seg_cnt--) {
2084 *dword_ptr++ =
2085 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2086 if (enable_64bit_addressing) {
2087 *dword_ptr++ =
2088 cpu_to_le32(pci_dma_hi32(
2089 sg_dma_address(prm->sg)));
2090 }
2091 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2092
2093 prm->sg = sg_next(prm->sg);
2094 }
2095
2096 qlt_load_cont_data_segments(prm, vha);
2097 }
2098
2099 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2100 {
2101 return cmd->bufflen > 0;
2102 }
2103
2104 /*
2105 * Called without ha->hardware_lock held
2106 */
2107 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2108 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2109 uint32_t *full_req_cnt)
2110 {
2111 struct qla_tgt *tgt = cmd->tgt;
2112 struct scsi_qla_host *vha = tgt->vha;
2113 struct qla_hw_data *ha = vha->hw;
2114 struct se_cmd *se_cmd = &cmd->se_cmd;
2115
2116 prm->cmd = cmd;
2117 prm->tgt = tgt;
2118 prm->rq_result = scsi_status;
2119 prm->sense_buffer = &cmd->sense_buffer[0];
2120 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2121 prm->sg = NULL;
2122 prm->seg_cnt = -1;
2123 prm->req_cnt = 1;
2124 prm->add_status_pkt = 0;
2125
2126 /* Send marker if required */
2127 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2128 return -EFAULT;
2129
2130 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2131 if (qlt_pci_map_calc_cnt(prm) != 0)
2132 return -EAGAIN;
2133 }
2134
2135 *full_req_cnt = prm->req_cnt;
2136
2137 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2138 prm->residual = se_cmd->residual_count;
2139 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2140 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2141 prm->residual, se_cmd->tag,
2142 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2143 cmd->bufflen, prm->rq_result);
2144 prm->rq_result |= SS_RESIDUAL_UNDER;
2145 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2146 prm->residual = se_cmd->residual_count;
2147 ql_dbg(ql_dbg_io, vha, 0x305d,
2148 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2149 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2150 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2151 prm->rq_result |= SS_RESIDUAL_OVER;
2152 }
2153
2154 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2155 /*
2156 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2157 * ignored in *xmit_response() below
2158 */
2159 if (qlt_has_data(cmd)) {
2160 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2161 (IS_FWI2_CAPABLE(ha) &&
2162 (prm->rq_result != 0))) {
2163 prm->add_status_pkt = 1;
2164 (*full_req_cnt)++;
2165 }
2166 }
2167 }
2168
2169 return 0;
2170 }
2171
2172 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2173 struct qla_tgt_cmd *cmd, int sending_sense)
2174 {
2175 if (ha->tgt.enable_class_2)
2176 return 0;
2177
2178 if (sending_sense)
2179 return cmd->conf_compl_supported;
2180 else
2181 return ha->tgt.enable_explicit_conf &&
2182 cmd->conf_compl_supported;
2183 }
2184
2185 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2186 /*
2187 * Original taken from the XFS code
2188 */
2189 static unsigned long qlt_srr_random(void)
2190 {
2191 static int Inited;
2192 static unsigned long RandomValue;
2193 static DEFINE_SPINLOCK(lock);
2194 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2195 register long rv;
2196 register long lo;
2197 register long hi;
2198 unsigned long flags;
2199
2200 spin_lock_irqsave(&lock, flags);
2201 if (!Inited) {
2202 RandomValue = jiffies;
2203 Inited = 1;
2204 }
2205 rv = RandomValue;
2206 hi = rv / 127773;
2207 lo = rv % 127773;
2208 rv = 16807 * lo - 2836 * hi;
2209 if (rv <= 0)
2210 rv += 2147483647;
2211 RandomValue = rv;
2212 spin_unlock_irqrestore(&lock, flags);
2213 return rv;
2214 }
2215
2216 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2217 {
2218 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2219 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2220 == 50) {
2221 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2222 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2223 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2224 }
2225 #endif
2226 /*
2227 * It's currently not possible to simulate SRRs for FCP_WRITE without
2228 * a physical link layer failure, so don't even try here..
2229 */
2230 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2231 return;
2232
2233 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2234 ((qlt_srr_random() % 100) == 20)) {
2235 int i, leave = 0;
2236 unsigned int tot_len = 0;
2237
2238 while (leave == 0)
2239 leave = qlt_srr_random() % cmd->sg_cnt;
2240
2241 for (i = 0; i < leave; i++)
2242 tot_len += cmd->sg[i].length;
2243
2244 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2245 "Cutting cmd %p (tag %d) buffer"
2246 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2247 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2248 cmd->bufflen, cmd->sg_cnt);
2249
2250 cmd->bufflen = tot_len;
2251 cmd->sg_cnt = leave;
2252 }
2253
2254 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2255 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2256
2257 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2258 "Cutting cmd %p (tag %d) buffer head "
2259 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2260 cmd->bufflen);
2261 if (offset == 0)
2262 *xmit_type &= ~QLA_TGT_XMIT_DATA;
2263 else if (qlt_set_data_offset(cmd, offset)) {
2264 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2265 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2266 }
2267 }
2268 }
2269 #else
2270 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2271 {}
2272 #endif
2273
2274 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2275 struct qla_tgt_prm *prm)
2276 {
2277 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2278 (uint32_t)sizeof(ctio->u.status1.sense_data));
2279 ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2280 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2281 ctio->u.status0.flags |= cpu_to_le16(
2282 CTIO7_FLAGS_EXPLICIT_CONFORM |
2283 CTIO7_FLAGS_CONFORM_REQ);
2284 }
2285 ctio->u.status0.residual = cpu_to_le32(prm->residual);
2286 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2287 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2288 int i;
2289
2290 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2291 if (prm->cmd->se_cmd.scsi_status != 0) {
2292 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2293 "Skipping EXPLICIT_CONFORM and "
2294 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2295 "non GOOD status\n");
2296 goto skip_explict_conf;
2297 }
2298 ctio->u.status1.flags |= cpu_to_le16(
2299 CTIO7_FLAGS_EXPLICIT_CONFORM |
2300 CTIO7_FLAGS_CONFORM_REQ);
2301 }
2302 skip_explict_conf:
2303 ctio->u.status1.flags &=
2304 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2305 ctio->u.status1.flags |=
2306 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2307 ctio->u.status1.scsi_status |=
2308 cpu_to_le16(SS_SENSE_LEN_VALID);
2309 ctio->u.status1.sense_length =
2310 cpu_to_le16(prm->sense_buffer_len);
2311 for (i = 0; i < prm->sense_buffer_len/4; i++)
2312 ((uint32_t *)ctio->u.status1.sense_data)[i] =
2313 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2314 #if 0
2315 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2316 static int q;
2317 if (q < 10) {
2318 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2319 "qla_target(%d): %d bytes of sense "
2320 "lost", prm->tgt->ha->vp_idx,
2321 prm->sense_buffer_len % 4);
2322 q++;
2323 }
2324 }
2325 #endif
2326 } else {
2327 ctio->u.status1.flags &=
2328 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2329 ctio->u.status1.flags |=
2330 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2331 ctio->u.status1.sense_length = 0;
2332 memset(ctio->u.status1.sense_data, 0,
2333 sizeof(ctio->u.status1.sense_data));
2334 }
2335
2336 /* Sense with len > 24, is it possible ??? */
2337 }
2338
2339
2340
2341 /* diff */
2342 static inline int
2343 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2344 {
2345 /*
2346 * Uncomment when corresponding SCSI changes are done.
2347 *
2348 if (!sp->cmd->prot_chk)
2349 return 0;
2350 *
2351 */
2352 switch (se_cmd->prot_op) {
2353 case TARGET_PROT_DOUT_INSERT:
2354 case TARGET_PROT_DIN_STRIP:
2355 if (ql2xenablehba_err_chk >= 1)
2356 return 1;
2357 break;
2358 case TARGET_PROT_DOUT_PASS:
2359 case TARGET_PROT_DIN_PASS:
2360 if (ql2xenablehba_err_chk >= 2)
2361 return 1;
2362 break;
2363 case TARGET_PROT_DIN_INSERT:
2364 case TARGET_PROT_DOUT_STRIP:
2365 return 1;
2366 default:
2367 break;
2368 }
2369 return 0;
2370 }
2371
2372 /*
2373 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2374 *
2375 */
2376 static inline void
2377 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2378 {
2379 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2380
2381 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2382 * have been immplemented by TCM, before AppTag is avail.
2383 * Look for modesense_handlers[]
2384 */
2385 ctx->app_tag = 0;
2386 ctx->app_tag_mask[0] = 0x0;
2387 ctx->app_tag_mask[1] = 0x0;
2388
2389 switch (se_cmd->prot_type) {
2390 case TARGET_DIF_TYPE0_PROT:
2391 /*
2392 * No check for ql2xenablehba_err_chk, as it would be an
2393 * I/O error if hba tag generation is not done.
2394 */
2395 ctx->ref_tag = cpu_to_le32(lba);
2396
2397 if (!qlt_hba_err_chk_enabled(se_cmd))
2398 break;
2399
2400 /* enable ALL bytes of the ref tag */
2401 ctx->ref_tag_mask[0] = 0xff;
2402 ctx->ref_tag_mask[1] = 0xff;
2403 ctx->ref_tag_mask[2] = 0xff;
2404 ctx->ref_tag_mask[3] = 0xff;
2405 break;
2406 /*
2407 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2408 * 16 bit app tag.
2409 */
2410 case TARGET_DIF_TYPE1_PROT:
2411 ctx->ref_tag = cpu_to_le32(lba);
2412
2413 if (!qlt_hba_err_chk_enabled(se_cmd))
2414 break;
2415
2416 /* enable ALL bytes of the ref tag */
2417 ctx->ref_tag_mask[0] = 0xff;
2418 ctx->ref_tag_mask[1] = 0xff;
2419 ctx->ref_tag_mask[2] = 0xff;
2420 ctx->ref_tag_mask[3] = 0xff;
2421 break;
2422 /*
2423 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2424 * match LBA in CDB + N
2425 */
2426 case TARGET_DIF_TYPE2_PROT:
2427 ctx->ref_tag = cpu_to_le32(lba);
2428
2429 if (!qlt_hba_err_chk_enabled(se_cmd))
2430 break;
2431
2432 /* enable ALL bytes of the ref tag */
2433 ctx->ref_tag_mask[0] = 0xff;
2434 ctx->ref_tag_mask[1] = 0xff;
2435 ctx->ref_tag_mask[2] = 0xff;
2436 ctx->ref_tag_mask[3] = 0xff;
2437 break;
2438
2439 /* For Type 3 protection: 16 bit GUARD only */
2440 case TARGET_DIF_TYPE3_PROT:
2441 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2442 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2443 break;
2444 }
2445 }
2446
2447
2448 static inline int
2449 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2450 {
2451 uint32_t *cur_dsd;
2452 uint32_t transfer_length = 0;
2453 uint32_t data_bytes;
2454 uint32_t dif_bytes;
2455 uint8_t bundling = 1;
2456 uint8_t *clr_ptr;
2457 struct crc_context *crc_ctx_pkt = NULL;
2458 struct qla_hw_data *ha;
2459 struct ctio_crc2_to_fw *pkt;
2460 dma_addr_t crc_ctx_dma;
2461 uint16_t fw_prot_opts = 0;
2462 struct qla_tgt_cmd *cmd = prm->cmd;
2463 struct se_cmd *se_cmd = &cmd->se_cmd;
2464 uint32_t h;
2465 struct atio_from_isp *atio = &prm->cmd->atio;
2466 uint16_t t16;
2467
2468 ha = vha->hw;
2469
2470 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2471 prm->pkt = pkt;
2472 memset(pkt, 0, sizeof(*pkt));
2473
2474 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2475 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2476 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2477 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2478
2479 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2480 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2481 bundling = 0;
2482
2483 /* Compute dif len and adjust data len to incude protection */
2484 data_bytes = cmd->bufflen;
2485 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2486
2487 switch (se_cmd->prot_op) {
2488 case TARGET_PROT_DIN_INSERT:
2489 case TARGET_PROT_DOUT_STRIP:
2490 transfer_length = data_bytes;
2491 data_bytes += dif_bytes;
2492 break;
2493
2494 case TARGET_PROT_DIN_STRIP:
2495 case TARGET_PROT_DOUT_INSERT:
2496 case TARGET_PROT_DIN_PASS:
2497 case TARGET_PROT_DOUT_PASS:
2498 transfer_length = data_bytes + dif_bytes;
2499 break;
2500
2501 default:
2502 BUG();
2503 break;
2504 }
2505
2506 if (!qlt_hba_err_chk_enabled(se_cmd))
2507 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2508 /* HBA error checking enabled */
2509 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2510 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2511 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2512 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2513 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2514 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2515 }
2516
2517 switch (se_cmd->prot_op) {
2518 case TARGET_PROT_DIN_INSERT:
2519 case TARGET_PROT_DOUT_INSERT:
2520 fw_prot_opts |= PO_MODE_DIF_INSERT;
2521 break;
2522 case TARGET_PROT_DIN_STRIP:
2523 case TARGET_PROT_DOUT_STRIP:
2524 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2525 break;
2526 case TARGET_PROT_DIN_PASS:
2527 case TARGET_PROT_DOUT_PASS:
2528 fw_prot_opts |= PO_MODE_DIF_PASS;
2529 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2530 break;
2531 default:/* Normal Request */
2532 fw_prot_opts |= PO_MODE_DIF_PASS;
2533 break;
2534 }
2535
2536
2537 /* ---- PKT ---- */
2538 /* Update entry type to indicate Command Type CRC_2 IOCB */
2539 pkt->entry_type = CTIO_CRC2;
2540 pkt->entry_count = 1;
2541 pkt->vp_index = vha->vp_idx;
2542
2543 h = qlt_make_handle(vha);
2544 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2545 /*
2546 * CTIO type 7 from the firmware doesn't provide a way to
2547 * know the initiator's LOOP ID, hence we can't find
2548 * the session and, so, the command.
2549 */
2550 return -EAGAIN;
2551 } else
2552 ha->tgt.cmds[h-1] = prm->cmd;
2553
2554
2555 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2556 pkt->nport_handle = prm->cmd->loop_id;
2557 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2558 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2559 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2560 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2561 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2562
2563 /* silence compile warning */
2564 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2565 pkt->ox_id = cpu_to_le16(t16);
2566
2567 t16 = (atio->u.isp24.attr << 9);
2568 pkt->flags |= cpu_to_le16(t16);
2569 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2570
2571 /* Set transfer direction */
2572 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2573 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2574 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2575 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2576
2577
2578 pkt->dseg_count = prm->tot_dsds;
2579 /* Fibre channel byte count */
2580 pkt->transfer_length = cpu_to_le32(transfer_length);
2581
2582
2583 /* ----- CRC context -------- */
2584
2585 /* Allocate CRC context from global pool */
2586 crc_ctx_pkt = cmd->ctx =
2587 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2588
2589 if (!crc_ctx_pkt)
2590 goto crc_queuing_error;
2591
2592 /* Zero out CTX area. */
2593 clr_ptr = (uint8_t *)crc_ctx_pkt;
2594 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2595
2596 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2597 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2598
2599 /* Set handle */
2600 crc_ctx_pkt->handle = pkt->handle;
2601
2602 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2603
2604 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2605 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2606 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2607
2608
2609 if (!bundling) {
2610 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2611 } else {
2612 /*
2613 * Configure Bundling if we need to fetch interlaving
2614 * protection PCI accesses
2615 */
2616 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2617 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2618 crc_ctx_pkt->u.bundling.dseg_count =
2619 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2620 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2621 }
2622
2623 /* Finish the common fields of CRC pkt */
2624 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2625 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2626 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2627 crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2628
2629
2630 /* Walks data segments */
2631 pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2632
2633 if (!bundling && prm->prot_seg_cnt) {
2634 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2635 prm->tot_dsds, cmd))
2636 goto crc_queuing_error;
2637 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2638 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2639 goto crc_queuing_error;
2640
2641 if (bundling && prm->prot_seg_cnt) {
2642 /* Walks dif segments */
2643 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2644
2645 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2646 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2647 prm->prot_seg_cnt, cmd))
2648 goto crc_queuing_error;
2649 }
2650 return QLA_SUCCESS;
2651
2652 crc_queuing_error:
2653 /* Cleanup will be performed by the caller */
2654
2655 return QLA_FUNCTION_FAILED;
2656 }
2657
2658
2659 /*
2660 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2661 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2662 */
2663 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2664 uint8_t scsi_status)
2665 {
2666 struct scsi_qla_host *vha = cmd->vha;
2667 struct qla_hw_data *ha = vha->hw;
2668 struct ctio7_to_24xx *pkt;
2669 struct qla_tgt_prm prm;
2670 uint32_t full_req_cnt = 0;
2671 unsigned long flags = 0;
2672 int res;
2673
2674 spin_lock_irqsave(&ha->hardware_lock, flags);
2675 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2676 cmd->state = QLA_TGT_STATE_PROCESSED;
2677 if (cmd->sess->logout_completed)
2678 /* no need to terminate. FW already freed exchange. */
2679 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2680 else
2681 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2682 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2683 return 0;
2684 }
2685 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2686
2687 memset(&prm, 0, sizeof(prm));
2688 qlt_check_srr_debug(cmd, &xmit_type);
2689
2690 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2691 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2692 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2693 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2694 &cmd->se_cmd);
2695
2696 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2697 &full_req_cnt);
2698 if (unlikely(res != 0)) {
2699 return res;
2700 }
2701
2702 spin_lock_irqsave(&ha->hardware_lock, flags);
2703
2704 if (xmit_type == QLA_TGT_XMIT_STATUS)
2705 vha->tgt_counters.core_qla_snd_status++;
2706 else
2707 vha->tgt_counters.core_qla_que_buf++;
2708
2709 if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2710 /*
2711 * Either the port is not online or this request was from
2712 * previous life, just abort the processing.
2713 */
2714 cmd->state = QLA_TGT_STATE_PROCESSED;
2715 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2716 ql_dbg(ql_dbg_async, vha, 0xe101,
2717 "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
2718 vha->flags.online, qla2x00_reset_active(vha),
2719 cmd->reset_count, ha->chip_reset);
2720 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2721 return 0;
2722 }
2723
2724 /* Does F/W have an IOCBs for this request */
2725 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2726 if (unlikely(res))
2727 goto out_unmap_unlock;
2728
2729 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2730 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2731 else
2732 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2733 if (unlikely(res != 0)) {
2734 vha->req->cnt += full_req_cnt;
2735 goto out_unmap_unlock;
2736 }
2737
2738 pkt = (struct ctio7_to_24xx *)prm.pkt;
2739
2740 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2741 pkt->u.status0.flags |=
2742 cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2743 CTIO7_FLAGS_STATUS_MODE_0);
2744
2745 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2746 qlt_load_data_segments(&prm, vha);
2747
2748 if (prm.add_status_pkt == 0) {
2749 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2750 pkt->u.status0.scsi_status =
2751 cpu_to_le16(prm.rq_result);
2752 pkt->u.status0.residual =
2753 cpu_to_le32(prm.residual);
2754 pkt->u.status0.flags |= cpu_to_le16(
2755 CTIO7_FLAGS_SEND_STATUS);
2756 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2757 pkt->u.status0.flags |=
2758 cpu_to_le16(
2759 CTIO7_FLAGS_EXPLICIT_CONFORM |
2760 CTIO7_FLAGS_CONFORM_REQ);
2761 }
2762 }
2763
2764 } else {
2765 /*
2766 * We have already made sure that there is sufficient
2767 * amount of request entries to not drop HW lock in
2768 * req_pkt().
2769 */
2770 struct ctio7_to_24xx *ctio =
2771 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2772
2773 ql_dbg(ql_dbg_io, vha, 0x305e,
2774 "Building additional status packet 0x%p.\n",
2775 ctio);
2776
2777 /*
2778 * T10Dif: ctio_crc2_to_fw overlay ontop of
2779 * ctio7_to_24xx
2780 */
2781 memcpy(ctio, pkt, sizeof(*ctio));
2782 /* reset back to CTIO7 */
2783 ctio->entry_count = 1;
2784 ctio->entry_type = CTIO_TYPE7;
2785 ctio->dseg_count = 0;
2786 ctio->u.status1.flags &= ~cpu_to_le16(
2787 CTIO7_FLAGS_DATA_IN);
2788
2789 /* Real finish is ctio_m1's finish */
2790 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2791 pkt->u.status0.flags |= cpu_to_le16(
2792 CTIO7_FLAGS_DONT_RET_CTIO);
2793
2794 /* qlt_24xx_init_ctio_to_isp will correct
2795 * all neccessary fields that's part of CTIO7.
2796 * There should be no residual of CTIO-CRC2 data.
2797 */
2798 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2799 &prm);
2800 pr_debug("Status CTIO7: %p\n", ctio);
2801 }
2802 } else
2803 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2804
2805
2806 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2807 cmd->cmd_sent_to_fw = 1;
2808
2809 /* Memory Barrier */
2810 wmb();
2811 qla2x00_start_iocbs(vha, vha->req);
2812 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2813
2814 return 0;
2815
2816 out_unmap_unlock:
2817 qlt_unmap_sg(vha, cmd);
2818 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2819
2820 return res;
2821 }
2822 EXPORT_SYMBOL(qlt_xmit_response);
2823
2824 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2825 {
2826 struct ctio7_to_24xx *pkt;
2827 struct scsi_qla_host *vha = cmd->vha;
2828 struct qla_hw_data *ha = vha->hw;
2829 struct qla_tgt *tgt = cmd->tgt;
2830 struct qla_tgt_prm prm;
2831 unsigned long flags;
2832 int res = 0;
2833
2834 memset(&prm, 0, sizeof(prm));
2835 prm.cmd = cmd;
2836 prm.tgt = tgt;
2837 prm.sg = NULL;
2838 prm.req_cnt = 1;
2839
2840 /* Send marker if required */
2841 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2842 return -EIO;
2843
2844 /* Calculate number of entries and segments required */
2845 if (qlt_pci_map_calc_cnt(&prm) != 0)
2846 return -EAGAIN;
2847
2848 spin_lock_irqsave(&ha->hardware_lock, flags);
2849
2850 if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
2851 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2852 /*
2853 * Either the port is not online or this request was from
2854 * previous life, just abort the processing.
2855 */
2856 cmd->state = QLA_TGT_STATE_NEED_DATA;
2857 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2858 ql_dbg(ql_dbg_async, vha, 0xe102,
2859 "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2860 vha->flags.online, qla2x00_reset_active(vha),
2861 cmd->reset_count, ha->chip_reset);
2862 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2863 return 0;
2864 }
2865
2866 /* Does F/W have an IOCBs for this request */
2867 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2868 if (res != 0)
2869 goto out_unlock_free_unmap;
2870 if (cmd->se_cmd.prot_op)
2871 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2872 else
2873 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2874
2875 if (unlikely(res != 0)) {
2876 vha->req->cnt += prm.req_cnt;
2877 goto out_unlock_free_unmap;
2878 }
2879
2880 pkt = (struct ctio7_to_24xx *)prm.pkt;
2881 pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2882 CTIO7_FLAGS_STATUS_MODE_0);
2883
2884 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2885 qlt_load_data_segments(&prm, vha);
2886
2887 cmd->state = QLA_TGT_STATE_NEED_DATA;
2888 cmd->cmd_sent_to_fw = 1;
2889
2890 /* Memory Barrier */
2891 wmb();
2892 qla2x00_start_iocbs(vha, vha->req);
2893 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2894
2895 return res;
2896
2897 out_unlock_free_unmap:
2898 qlt_unmap_sg(vha, cmd);
2899 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2900
2901 return res;
2902 }
2903 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2904
2905
2906 /*
2907 * Checks the guard or meta-data for the type of error
2908 * detected by the HBA.
2909 */
2910 static inline int
2911 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2912 struct ctio_crc_from_fw *sts)
2913 {
2914 uint8_t *ap = &sts->actual_dif[0];
2915 uint8_t *ep = &sts->expected_dif[0];
2916 uint32_t e_ref_tag, a_ref_tag;
2917 uint16_t e_app_tag, a_app_tag;
2918 uint16_t e_guard, a_guard;
2919 uint64_t lba = cmd->se_cmd.t_task_lba;
2920
2921 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2922 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2923 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2924
2925 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2926 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2927 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2928
2929 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2930 "iocb(s) %p Returned STATUS.\n", sts);
2931
2932 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2933 "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",
2934 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2935 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2936
2937 /*
2938 * Ignore sector if:
2939 * For type 3: ref & app tag is all 'f's
2940 * For type 0,1,2: app tag is all 'f's
2941 */
2942 if ((a_app_tag == 0xffff) &&
2943 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2944 (a_ref_tag == 0xffffffff))) {
2945 uint32_t blocks_done;
2946
2947 /* 2TB boundary case covered automatically with this */
2948 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2949 cmd->se_cmd.bad_sector = e_ref_tag;
2950 cmd->se_cmd.pi_err = 0;
2951 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2952 "need to return scsi good\n");
2953
2954 /* Update protection tag */
2955 if (cmd->prot_sg_cnt) {
2956 uint32_t i, k = 0, num_ent;
2957 struct scatterlist *sg, *sgl;
2958
2959
2960 sgl = cmd->prot_sg;
2961
2962 /* Patch the corresponding protection tags */
2963 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2964 num_ent = sg_dma_len(sg) / 8;
2965 if (k + num_ent < blocks_done) {
2966 k += num_ent;
2967 continue;
2968 }
2969 k = blocks_done;
2970 break;
2971 }
2972
2973 if (k != blocks_done) {
2974 ql_log(ql_log_warn, vha, 0xf076,
2975 "unexpected tag values tag:lba=%u:%llu)\n",
2976 e_ref_tag, (unsigned long long)lba);
2977 goto out;
2978 }
2979
2980 #if 0
2981 struct sd_dif_tuple *spt;
2982 /* TODO:
2983 * This section came from initiator. Is it valid here?
2984 * should ulp be override with actual val???
2985 */
2986 spt = page_address(sg_page(sg)) + sg->offset;
2987 spt += j;
2988
2989 spt->app_tag = 0xffff;
2990 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2991 spt->ref_tag = 0xffffffff;
2992 #endif
2993 }
2994
2995 return 0;
2996 }
2997
2998 /* check guard */
2999 if (e_guard != a_guard) {
3000 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
3001 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3002
3003 ql_log(ql_log_warn, vha, 0xe076,
3004 "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",
3005 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3006 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3007 a_guard, e_guard, cmd);
3008 goto out;
3009 }
3010
3011 /* check ref tag */
3012 if (e_ref_tag != a_ref_tag) {
3013 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
3014 cmd->se_cmd.bad_sector = e_ref_tag;
3015
3016 ql_log(ql_log_warn, vha, 0xe077,
3017 "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",
3018 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3019 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3020 a_guard, e_guard, cmd);
3021 goto out;
3022 }
3023
3024 /* check appl tag */
3025 if (e_app_tag != a_app_tag) {
3026 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
3027 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3028
3029 ql_log(ql_log_warn, vha, 0xe078,
3030 "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",
3031 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3032 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3033 a_guard, e_guard, cmd);
3034 goto out;
3035 }
3036 out:
3037 return 1;
3038 }
3039
3040
3041 /* If hardware_lock held on entry, might drop it, then reaquire */
3042 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3043 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3044 struct imm_ntfy_from_isp *ntfy)
3045 {
3046 struct nack_to_isp *nack;
3047 struct qla_hw_data *ha = vha->hw;
3048 request_t *pkt;
3049 int ret = 0;
3050
3051 ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3052 "Sending TERM ELS CTIO (ha=%p)\n", ha);
3053
3054 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3055 if (pkt == NULL) {
3056 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3057 "qla_target(%d): %s failed: unable to allocate "
3058 "request packet\n", vha->vp_idx, __func__);
3059 return -ENOMEM;
3060 }
3061
3062 pkt->entry_type = NOTIFY_ACK_TYPE;
3063 pkt->entry_count = 1;
3064 pkt->handle = QLA_TGT_SKIP_HANDLE;
3065
3066 nack = (struct nack_to_isp *)pkt;
3067 nack->ox_id = ntfy->ox_id;
3068
3069 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3070 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3071 nack->u.isp24.flags = ntfy->u.isp24.flags &
3072 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3073 }
3074
3075 /* terminate */
3076 nack->u.isp24.flags |=
3077 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3078
3079 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3080 nack->u.isp24.status = ntfy->u.isp24.status;
3081 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3082 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3083 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3084 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3085 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3086 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3087
3088 qla2x00_start_iocbs(vha, vha->req);
3089 return ret;
3090 }
3091
3092 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3093 struct imm_ntfy_from_isp *imm, int ha_locked)
3094 {
3095 unsigned long flags = 0;
3096 int rc;
3097
3098 if (qlt_issue_marker(vha, ha_locked) < 0)
3099 return;
3100
3101 if (ha_locked) {
3102 rc = __qlt_send_term_imm_notif(vha, imm);
3103
3104 #if 0 /* Todo */
3105 if (rc == -ENOMEM)
3106 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3107 #else
3108 if (rc) {
3109 }
3110 #endif
3111 goto done;
3112 }
3113
3114 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3115 rc = __qlt_send_term_imm_notif(vha, imm);
3116
3117 #if 0 /* Todo */
3118 if (rc == -ENOMEM)
3119 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3120 #endif
3121
3122 done:
3123 if (!ha_locked)
3124 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3125 }
3126
3127 /* If hardware_lock held on entry, might drop it, then reaquire */
3128 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3129 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3130 struct qla_tgt_cmd *cmd,
3131 struct atio_from_isp *atio)
3132 {
3133 struct ctio7_to_24xx *ctio24;
3134 struct qla_hw_data *ha = vha->hw;
3135 request_t *pkt;
3136 int ret = 0;
3137 uint16_t temp;
3138
3139 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3140
3141 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3142 if (pkt == NULL) {
3143 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3144 "qla_target(%d): %s failed: unable to allocate "
3145 "request packet\n", vha->vp_idx, __func__);
3146 return -ENOMEM;
3147 }
3148
3149 if (cmd != NULL) {
3150 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3151 ql_dbg(ql_dbg_tgt, vha, 0xe051,
3152 "qla_target(%d): Terminating cmd %p with "
3153 "incorrect state %d\n", vha->vp_idx, cmd,
3154 cmd->state);
3155 } else
3156 ret = 1;
3157 }
3158
3159 vha->tgt_counters.num_term_xchg_sent++;
3160 pkt->entry_count = 1;
3161 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3162
3163 ctio24 = (struct ctio7_to_24xx *)pkt;
3164 ctio24->entry_type = CTIO_TYPE7;
3165 ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3166 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3167 ctio24->vp_index = vha->vp_idx;
3168 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3169 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3170 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3171 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3172 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3173 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3174 CTIO7_FLAGS_TERMINATE);
3175 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3176 ctio24->u.status1.ox_id = cpu_to_le16(temp);
3177
3178 /* Most likely, it isn't needed */
3179 ctio24->u.status1.residual = get_unaligned((uint32_t *)
3180 &atio->u.isp24.fcp_cmnd.add_cdb[
3181 atio->u.isp24.fcp_cmnd.add_cdb_len]);
3182 if (ctio24->u.status1.residual != 0)
3183 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3184
3185 /* Memory Barrier */
3186 wmb();
3187 qla2x00_start_iocbs(vha, vha->req);
3188 return ret;
3189 }
3190
3191 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3192 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3193 int ul_abort)
3194 {
3195 unsigned long flags = 0;
3196 int rc;
3197
3198 if (qlt_issue_marker(vha, ha_locked) < 0)
3199 return;
3200
3201 if (ha_locked) {
3202 rc = __qlt_send_term_exchange(vha, cmd, atio);
3203 if (rc == -ENOMEM)
3204 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3205 goto done;
3206 }
3207 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3208 rc = __qlt_send_term_exchange(vha, cmd, atio);
3209 if (rc == -ENOMEM)
3210 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3211
3212 done:
3213 if (cmd && !ul_abort && !cmd->aborted) {
3214 if (cmd->sg_mapped)
3215 qlt_unmap_sg(vha, cmd);
3216 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3217 }
3218
3219 if (!ha_locked)
3220 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3221
3222 return;
3223 }
3224
3225 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3226 {
3227 struct list_head free_list;
3228 struct qla_tgt_cmd *cmd, *tcmd;
3229
3230 vha->hw->tgt.leak_exchg_thresh_hold =
3231 (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3232
3233 cmd = tcmd = NULL;
3234 if (!list_empty(&vha->hw->tgt.q_full_list)) {
3235 INIT_LIST_HEAD(&free_list);
3236 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3237
3238 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3239 list_del(&cmd->cmd_list);
3240 /* This cmd was never sent to TCM. There is no need
3241 * to schedule free or call free_cmd
3242 */
3243 qlt_free_cmd(cmd);
3244 vha->hw->tgt.num_qfull_cmds_alloc--;
3245 }
3246 }
3247 vha->hw->tgt.num_qfull_cmds_dropped = 0;
3248 }
3249
3250 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3251 {
3252 uint32_t total_leaked;
3253
3254 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3255
3256 if (vha->hw->tgt.leak_exchg_thresh_hold &&
3257 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3258
3259 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3260 "Chip reset due to exchange starvation: %d/%d.\n",
3261 total_leaked, vha->hw->cur_fw_xcb_count);
3262
3263 if (IS_P3P_TYPE(vha->hw))
3264 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3265 else
3266 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3267 qla2xxx_wake_dpc(vha);
3268 }
3269
3270 }
3271
3272 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3273 {
3274 struct qla_tgt *tgt = cmd->tgt;
3275 struct scsi_qla_host *vha = tgt->vha;
3276 struct se_cmd *se_cmd = &cmd->se_cmd;
3277 unsigned long flags;
3278
3279 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3280 "qla_target(%d): terminating exchange for aborted cmd=%p "
3281 "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3282 se_cmd->tag);
3283
3284 spin_lock_irqsave(&cmd->cmd_lock, flags);
3285 if (cmd->aborted) {
3286 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3287 /*
3288 * It's normal to see 2 calls in this path:
3289 * 1) XFER Rdy completion + CMD_T_ABORT
3290 * 2) TCM TMR - drain_state_list
3291 */
3292 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3293 "multiple abort. %p transport_state %x, t_state %x,"
3294 " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3295 cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3296 return EIO;
3297 }
3298 cmd->aborted = 1;
3299 cmd->cmd_flags |= BIT_6;
3300 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3301
3302 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3303 return 0;
3304 }
3305 EXPORT_SYMBOL(qlt_abort_cmd);
3306
3307 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3308 {
3309 struct qla_tgt_sess *sess = cmd->sess;
3310
3311 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3312 "%s: se_cmd[%p] ox_id %04x\n",
3313 __func__, &cmd->se_cmd,
3314 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3315
3316 BUG_ON(cmd->cmd_in_wq);
3317
3318 if (cmd->sg_mapped)
3319 qlt_unmap_sg(cmd->vha, cmd);
3320
3321 if (!cmd->q_full)
3322 qlt_decr_num_pend_cmds(cmd->vha);
3323
3324 BUG_ON(cmd->sg_mapped);
3325 cmd->jiffies_at_free = get_jiffies_64();
3326 if (unlikely(cmd->free_sg))
3327 kfree(cmd->sg);
3328
3329 if (!sess || !sess->se_sess) {
3330 WARN_ON(1);
3331 return;
3332 }
3333 cmd->jiffies_at_free = get_jiffies_64();
3334 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3335 }
3336 EXPORT_SYMBOL(qlt_free_cmd);
3337
3338 /* ha->hardware_lock supposed to be held on entry */
3339 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3340 struct qla_tgt_cmd *cmd, void *ctio)
3341 {
3342 struct qla_tgt_srr_ctio *sc;
3343 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3344 struct qla_tgt_srr_imm *imm;
3345
3346 tgt->ctio_srr_id++;
3347 cmd->cmd_flags |= BIT_15;
3348
3349 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3350 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3351
3352 if (!ctio) {
3353 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3354 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3355 vha->vp_idx);
3356 return -EINVAL;
3357 }
3358
3359 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3360 if (sc != NULL) {
3361 sc->cmd = cmd;
3362 /* IRQ is already OFF */
3363 spin_lock(&tgt->srr_lock);
3364 sc->srr_id = tgt->ctio_srr_id;
3365 list_add_tail(&sc->srr_list_entry,
3366 &tgt->srr_ctio_list);
3367 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3368 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3369 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3370 int found = 0;
3371 list_for_each_entry(imm, &tgt->srr_imm_list,
3372 srr_list_entry) {
3373 if (imm->srr_id == sc->srr_id) {
3374 found = 1;
3375 break;
3376 }
3377 }
3378 if (found) {
3379 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3380 "Scheduling srr work\n");
3381 schedule_work(&tgt->srr_work);
3382 } else {
3383 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3384 "qla_target(%d): imm_srr_id "
3385 "== ctio_srr_id (%d), but there is no "
3386 "corresponding SRR IMM, deleting CTIO "
3387 "SRR %p\n", vha->vp_idx,
3388 tgt->ctio_srr_id, sc);
3389 list_del(&sc->srr_list_entry);
3390 spin_unlock(&tgt->srr_lock);
3391
3392 kfree(sc);
3393 return -EINVAL;
3394 }
3395 }
3396 spin_unlock(&tgt->srr_lock);
3397 } else {
3398 struct qla_tgt_srr_imm *ti;
3399
3400 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3401 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3402 vha->vp_idx);
3403 spin_lock(&tgt->srr_lock);
3404 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3405 srr_list_entry) {
3406 if (imm->srr_id == tgt->ctio_srr_id) {
3407 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3408 "IMM SRR %p deleted (id %d)\n",
3409 imm, imm->srr_id);
3410 list_del(&imm->srr_list_entry);
3411 qlt_reject_free_srr_imm(vha, imm, 1);
3412 }
3413 }
3414 spin_unlock(&tgt->srr_lock);
3415
3416 return -ENOMEM;
3417 }
3418
3419 return 0;
3420 }
3421
3422 /*
3423 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3424 */
3425 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3426 struct qla_tgt_cmd *cmd, uint32_t status)
3427 {
3428 int term = 0;
3429
3430 if (ctio != NULL) {
3431 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3432 term = !(c->flags &
3433 cpu_to_le16(OF_TERM_EXCH));
3434 } else
3435 term = 1;
3436
3437 if (term)
3438 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3439
3440 return term;
3441 }
3442
3443 /* ha->hardware_lock supposed to be held on entry */
3444 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3445 uint32_t handle)
3446 {
3447 struct qla_hw_data *ha = vha->hw;
3448
3449 handle--;
3450 if (ha->tgt.cmds[handle] != NULL) {
3451 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3452 ha->tgt.cmds[handle] = NULL;
3453 return cmd;
3454 } else
3455 return NULL;
3456 }
3457
3458 /* ha->hardware_lock supposed to be held on entry */
3459 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3460 uint32_t handle, void *ctio)
3461 {
3462 struct qla_tgt_cmd *cmd = NULL;
3463
3464 /* Clear out internal marks */
3465 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3466 CTIO_INTERMEDIATE_HANDLE_MARK);
3467
3468 if (handle != QLA_TGT_NULL_HANDLE) {
3469 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3470 return NULL;
3471
3472 /* handle-1 is actually used */
3473 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3474 ql_dbg(ql_dbg_tgt, vha, 0xe052,
3475 "qla_target(%d): Wrong handle %x received\n",
3476 vha->vp_idx, handle);
3477 return NULL;
3478 }
3479 cmd = qlt_get_cmd(vha, handle);
3480 if (unlikely(cmd == NULL)) {
3481 ql_dbg(ql_dbg_tgt, vha, 0xe053,
3482 "qla_target(%d): Suspicious: unable to "
3483 "find the command with handle %x\n", vha->vp_idx,
3484 handle);
3485 return NULL;
3486 }
3487 } else if (ctio != NULL) {
3488 /* We can't get loop ID from CTIO7 */
3489 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3490 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3491 "support NULL handles\n", vha->vp_idx);
3492 return NULL;
3493 }
3494
3495 return cmd;
3496 }
3497
3498 /* hardware_lock should be held by caller. */
3499 static void
3500 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3501 {
3502 struct qla_hw_data *ha = vha->hw;
3503 uint32_t handle;
3504
3505 if (cmd->sg_mapped)
3506 qlt_unmap_sg(vha, cmd);
3507
3508 handle = qlt_make_handle(vha);
3509
3510 /* TODO: fix debug message type and ids. */
3511 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3512 ql_dbg(ql_dbg_io, vha, 0xff00,
3513 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3514 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3515 cmd->write_data_transferred = 0;
3516 cmd->state = QLA_TGT_STATE_DATA_IN;
3517
3518 ql_dbg(ql_dbg_io, vha, 0xff01,
3519 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3520
3521 ha->tgt.tgt_ops->handle_data(cmd);
3522 return;
3523 } else {
3524 ql_dbg(ql_dbg_io, vha, 0xff03,
3525 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3526 cmd->state);
3527 dump_stack();
3528 }
3529
3530 cmd->cmd_flags |= BIT_17;
3531 ha->tgt.tgt_ops->free_cmd(cmd);
3532 }
3533
3534 void
3535 qlt_host_reset_handler(struct qla_hw_data *ha)
3536 {
3537 struct qla_tgt_cmd *cmd;
3538 unsigned long flags;
3539 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3540 scsi_qla_host_t *vha = NULL;
3541 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3542 uint32_t i;
3543
3544 if (!base_vha->hw->tgt.tgt_ops)
3545 return;
3546
3547 if (!tgt || qla_ini_mode_enabled(base_vha)) {
3548 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3549 "Target mode disabled\n");
3550 return;
3551 }
3552
3553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3554 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3555 base_vha->dpc_flags);
3556
3557 spin_lock_irqsave(&ha->hardware_lock, flags);
3558 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3559 cmd = qlt_get_cmd(base_vha, i);
3560 if (!cmd)
3561 continue;
3562 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3563 vha = cmd->vha;
3564 qlt_abort_cmd_on_host_reset(vha, cmd);
3565 }
3566 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3567 }
3568
3569
3570 /*
3571 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3572 */
3573 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3574 uint32_t status, void *ctio)
3575 {
3576 struct qla_hw_data *ha = vha->hw;
3577 struct se_cmd *se_cmd;
3578 struct qla_tgt_cmd *cmd;
3579
3580 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3581 /* That could happen only in case of an error/reset/abort */
3582 if (status != CTIO_SUCCESS) {
3583 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3584 "Intermediate CTIO received"
3585 " (status %x)\n", status);
3586 }
3587 return;
3588 }
3589
3590 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3591 if (cmd == NULL)
3592 return;
3593
3594 se_cmd = &cmd->se_cmd;
3595 cmd->cmd_sent_to_fw = 0;
3596
3597 qlt_unmap_sg(vha, cmd);
3598
3599 if (unlikely(status != CTIO_SUCCESS)) {
3600 switch (status & 0xFFFF) {
3601 case CTIO_LIP_RESET:
3602 case CTIO_TARGET_RESET:
3603 case CTIO_ABORTED:
3604 /* driver request abort via Terminate exchange */
3605 case CTIO_TIMEOUT:
3606 case CTIO_INVALID_RX_ID:
3607 /* They are OK */
3608 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3609 "qla_target(%d): CTIO with "
3610 "status %#x received, state %x, se_cmd %p, "
3611 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3612 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3613 status, cmd->state, se_cmd);
3614 break;
3615
3616 case CTIO_PORT_LOGGED_OUT:
3617 case CTIO_PORT_UNAVAILABLE:
3618 {
3619 int logged_out =
3620 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3621
3622 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3623 "qla_target(%d): CTIO with %s status %x "
3624 "received (state %x, se_cmd %p)\n", vha->vp_idx,
3625 logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3626 status, cmd->state, se_cmd);
3627
3628 if (logged_out && cmd->sess) {
3629 /*
3630 * Session is already logged out, but we need
3631 * to notify initiator, who's not aware of this
3632 */
3633 cmd->sess->logout_on_delete = 0;
3634 cmd->sess->send_els_logo = 1;
3635 qlt_schedule_sess_for_deletion(cmd->sess, true);
3636 }
3637 break;
3638 }
3639 case CTIO_SRR_RECEIVED:
3640 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3641 "qla_target(%d): CTIO with SRR_RECEIVED"
3642 " status %x received (state %x, se_cmd %p)\n",
3643 vha->vp_idx, status, cmd->state, se_cmd);
3644 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3645 break;
3646 else
3647 return;
3648
3649 case CTIO_DIF_ERROR: {
3650 struct ctio_crc_from_fw *crc =
3651 (struct ctio_crc_from_fw *)ctio;
3652 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3653 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3654 vha->vp_idx, status, cmd->state, se_cmd,
3655 *((u64 *)&crc->actual_dif[0]),
3656 *((u64 *)&crc->expected_dif[0]));
3657
3658 if (qlt_handle_dif_error(vha, cmd, ctio)) {
3659 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3660 /* scsi Write/xfer rdy complete */
3661 goto skip_term;
3662 } else {
3663 /* scsi read/xmit respond complete
3664 * call handle dif to send scsi status
3665 * rather than terminate exchange.
3666 */
3667 cmd->state = QLA_TGT_STATE_PROCESSED;
3668 ha->tgt.tgt_ops->handle_dif_err(cmd);
3669 return;
3670 }
3671 } else {
3672 /* Need to generate a SCSI good completion.
3673 * because FW did not send scsi status.
3674 */
3675 status = 0;
3676 goto skip_term;
3677 }
3678 break;
3679 }
3680 default:
3681 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3682 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3683 vha->vp_idx, status, cmd->state, se_cmd);
3684 break;
3685 }
3686
3687
3688 /* "cmd->aborted" means
3689 * cmd is already aborted/terminated, we don't
3690 * need to terminate again. The exchange is already
3691 * cleaned up/freed at FW level. Just cleanup at driver
3692 * level.
3693 */
3694 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3695 (!cmd->aborted)) {
3696 cmd->cmd_flags |= BIT_13;
3697 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3698 return;
3699 }
3700 }
3701 skip_term:
3702
3703 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3704 cmd->cmd_flags |= BIT_12;
3705 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3706 cmd->state = QLA_TGT_STATE_DATA_IN;
3707
3708 if (status == CTIO_SUCCESS)
3709 cmd->write_data_transferred = 1;
3710
3711 ha->tgt.tgt_ops->handle_data(cmd);
3712 return;
3713 } else if (cmd->aborted) {
3714 cmd->cmd_flags |= BIT_18;
3715 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3716 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3717 } else {
3718 cmd->cmd_flags |= BIT_19;
3719 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3720 "qla_target(%d): A command in state (%d) should "
3721 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3722 }
3723
3724 if (unlikely(status != CTIO_SUCCESS) &&
3725 !cmd->aborted) {
3726 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3727 dump_stack();
3728 }
3729
3730 ha->tgt.tgt_ops->free_cmd(cmd);
3731 }
3732
3733 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3734 uint8_t task_codes)
3735 {
3736 int fcp_task_attr;
3737
3738 switch (task_codes) {
3739 case ATIO_SIMPLE_QUEUE:
3740 fcp_task_attr = TCM_SIMPLE_TAG;
3741 break;
3742 case ATIO_HEAD_OF_QUEUE:
3743 fcp_task_attr = TCM_HEAD_TAG;
3744 break;
3745 case ATIO_ORDERED_QUEUE:
3746 fcp_task_attr = TCM_ORDERED_TAG;
3747 break;
3748 case ATIO_ACA_QUEUE:
3749 fcp_task_attr = TCM_ACA_TAG;
3750 break;
3751 case ATIO_UNTAGGED:
3752 fcp_task_attr = TCM_SIMPLE_TAG;
3753 break;
3754 default:
3755 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3756 "qla_target: unknown task code %x, use ORDERED instead\n",
3757 task_codes);
3758 fcp_task_attr = TCM_ORDERED_TAG;
3759 break;
3760 }
3761
3762 return fcp_task_attr;
3763 }
3764
3765 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3766 uint8_t *);
3767 /*
3768 * Process context for I/O path into tcm_qla2xxx code
3769 */
3770 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3771 {
3772 scsi_qla_host_t *vha = cmd->vha;
3773 struct qla_hw_data *ha = vha->hw;
3774 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3775 struct qla_tgt_sess *sess = cmd->sess;
3776 struct atio_from_isp *atio = &cmd->atio;
3777 unsigned char *cdb;
3778 unsigned long flags;
3779 uint32_t data_length;
3780 int ret, fcp_task_attr, data_dir, bidi = 0;
3781
3782 cmd->cmd_in_wq = 0;
3783 cmd->cmd_flags |= BIT_1;
3784 if (tgt->tgt_stop)
3785 goto out_term;
3786
3787 if (cmd->aborted) {
3788 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3789 "cmd with tag %u is aborted\n",
3790 cmd->atio.u.isp24.exchange_addr);
3791 goto out_term;
3792 }
3793
3794 spin_lock_init(&cmd->cmd_lock);
3795 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3796 cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3797 cmd->unpacked_lun = scsilun_to_int(
3798 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3799
3800 if (atio->u.isp24.fcp_cmnd.rddata &&
3801 atio->u.isp24.fcp_cmnd.wrdata) {
3802 bidi = 1;
3803 data_dir = DMA_TO_DEVICE;
3804 } else if (atio->u.isp24.fcp_cmnd.rddata)
3805 data_dir = DMA_FROM_DEVICE;
3806 else if (atio->u.isp24.fcp_cmnd.wrdata)
3807 data_dir = DMA_TO_DEVICE;
3808 else
3809 data_dir = DMA_NONE;
3810
3811 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3812 atio->u.isp24.fcp_cmnd.task_attr);
3813 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3814 &atio->u.isp24.fcp_cmnd.add_cdb[
3815 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3816
3817 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3818 fcp_task_attr, data_dir, bidi);
3819 if (ret != 0)
3820 goto out_term;
3821 /*
3822 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3823 */
3824 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3825 qlt_put_sess(sess);
3826 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3827 return;
3828
3829 out_term:
3830 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3831 /*
3832 * cmd has not sent to target yet, so pass NULL as the second
3833 * argument to qlt_send_term_exchange() and free the memory here.
3834 */
3835 cmd->cmd_flags |= BIT_2;
3836 spin_lock_irqsave(&ha->hardware_lock, flags);
3837 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3838
3839 qlt_decr_num_pend_cmds(vha);
3840 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3841 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3842
3843 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3844 qlt_put_sess(sess);
3845 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3846 }
3847
3848 static void qlt_do_work(struct work_struct *work)
3849 {
3850 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3851 scsi_qla_host_t *vha = cmd->vha;
3852 unsigned long flags;
3853
3854 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3855 list_del(&cmd->cmd_list);
3856 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3857
3858 __qlt_do_work(cmd);
3859 }
3860
3861 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3862 struct qla_tgt_sess *sess,
3863 struct atio_from_isp *atio)
3864 {
3865 struct se_session *se_sess = sess->se_sess;
3866 struct qla_tgt_cmd *cmd;
3867 int tag;
3868
3869 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3870 if (tag < 0)
3871 return NULL;
3872
3873 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3874 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3875
3876 memcpy(&cmd->atio, atio, sizeof(*atio));
3877 cmd->state = QLA_TGT_STATE_NEW;
3878 cmd->tgt = vha->vha_tgt.qla_tgt;
3879 qlt_incr_num_pend_cmds(vha);
3880 cmd->vha = vha;
3881 cmd->se_cmd.map_tag = tag;
3882 cmd->sess = sess;
3883 cmd->loop_id = sess->loop_id;
3884 cmd->conf_compl_supported = sess->conf_compl_supported;
3885
3886 cmd->cmd_flags = 0;
3887 cmd->jiffies_at_alloc = get_jiffies_64();
3888
3889 cmd->reset_count = vha->hw->chip_reset;
3890
3891 return cmd;
3892 }
3893
3894 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3895 uint16_t);
3896
3897 static void qlt_create_sess_from_atio(struct work_struct *work)
3898 {
3899 struct qla_tgt_sess_op *op = container_of(work,
3900 struct qla_tgt_sess_op, work);
3901 scsi_qla_host_t *vha = op->vha;
3902 struct qla_hw_data *ha = vha->hw;
3903 struct qla_tgt_sess *sess;
3904 struct qla_tgt_cmd *cmd;
3905 unsigned long flags;
3906 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3907
3908 spin_lock_irqsave(&vha->cmd_list_lock, flags);
3909 list_del(&op->cmd_list);
3910 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3911
3912 if (op->aborted) {
3913 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3914 "sess_op with tag %u is aborted\n",
3915 op->atio.u.isp24.exchange_addr);
3916 goto out_term;
3917 }
3918
3919 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3920 "qla_target(%d): Unable to find wwn login"
3921 " (s_id %x:%x:%x), trying to create it manually\n",
3922 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3923
3924 if (op->atio.u.raw.entry_count > 1) {
3925 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3926 "Dropping multy entry atio %p\n", &op->atio);
3927 goto out_term;
3928 }
3929
3930 sess = qlt_make_local_sess(vha, s_id);
3931 /* sess has an extra creation ref. */
3932
3933 if (!sess)
3934 goto out_term;
3935 /*
3936 * Now obtain a pre-allocated session tag using the original op->atio
3937 * packet header, and dispatch into __qlt_do_work() using the existing
3938 * process context.
3939 */
3940 cmd = qlt_get_tag(vha, sess, &op->atio);
3941 if (!cmd) {
3942 spin_lock_irqsave(&ha->hardware_lock, flags);
3943 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3944 qlt_put_sess(sess);
3945 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3946 kfree(op);
3947 return;
3948 }
3949 /*
3950 * __qlt_do_work() will call qlt_put_sess() to release
3951 * the extra reference taken above by qlt_make_local_sess()
3952 */
3953 __qlt_do_work(cmd);
3954 kfree(op);
3955 return;
3956
3957 out_term:
3958 spin_lock_irqsave(&ha->hardware_lock, flags);
3959 qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
3960 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3961 kfree(op);
3962
3963 }
3964
3965 /* ha->hardware_lock supposed to be held on entry */
3966 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3967 struct atio_from_isp *atio)
3968 {
3969 struct qla_hw_data *ha = vha->hw;
3970 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3971 struct qla_tgt_sess *sess;
3972 struct qla_tgt_cmd *cmd;
3973
3974 if (unlikely(tgt->tgt_stop)) {
3975 ql_dbg(ql_dbg_io, vha, 0x3061,
3976 "New command while device %p is shutting down\n", tgt);
3977 return -EFAULT;
3978 }
3979
3980 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3981 if (unlikely(!sess)) {
3982 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3983 GFP_ATOMIC);
3984 if (!op)
3985 return -ENOMEM;
3986
3987 memcpy(&op->atio, atio, sizeof(*atio));
3988 op->vha = vha;
3989
3990 spin_lock(&vha->cmd_list_lock);
3991 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3992 spin_unlock(&vha->cmd_list_lock);
3993
3994 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3995 queue_work(qla_tgt_wq, &op->work);
3996 return 0;
3997 }
3998
3999 /* Another WWN used to have our s_id. Our PLOGI scheduled its
4000 * session deletion, but it's still in sess_del_work wq */
4001 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
4002 ql_dbg(ql_dbg_io, vha, 0x3061,
4003 "New command while old session %p is being deleted\n",
4004 sess);
4005 return -EFAULT;
4006 }
4007
4008 /*
4009 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4010 */
4011 kref_get(&sess->sess_kref);
4012
4013 cmd = qlt_get_tag(vha, sess, atio);
4014 if (!cmd) {
4015 ql_dbg(ql_dbg_io, vha, 0x3062,
4016 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4017 qlt_put_sess(sess);
4018 return -ENOMEM;
4019 }
4020
4021 cmd->cmd_in_wq = 1;
4022 cmd->cmd_flags |= BIT_0;
4023 cmd->se_cmd.cpuid = ha->msix_count ?
4024 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4025
4026 spin_lock(&vha->cmd_list_lock);
4027 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4028 spin_unlock(&vha->cmd_list_lock);
4029
4030 INIT_WORK(&cmd->work, qlt_do_work);
4031 if (ha->msix_count) {
4032 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4033 queue_work_on(smp_processor_id(), qla_tgt_wq,
4034 &cmd->work);
4035 else
4036 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4037 &cmd->work);
4038 } else {
4039 queue_work(qla_tgt_wq, &cmd->work);
4040 }
4041 return 0;
4042
4043 }
4044
4045 /* ha->hardware_lock supposed to be held on entry */
4046 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
4047 int fn, void *iocb, int flags)
4048 {
4049 struct scsi_qla_host *vha = sess->vha;
4050 struct qla_hw_data *ha = vha->hw;
4051 struct qla_tgt_mgmt_cmd *mcmd;
4052 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4053 int res;
4054 uint8_t tmr_func;
4055
4056 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4057 if (!mcmd) {
4058 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4059 "qla_target(%d): Allocation of management "
4060 "command failed, some commands and their data could "
4061 "leak\n", vha->vp_idx);
4062 return -ENOMEM;
4063 }
4064 memset(mcmd, 0, sizeof(*mcmd));
4065 mcmd->sess = sess;
4066
4067 if (iocb) {
4068 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4069 sizeof(mcmd->orig_iocb.imm_ntfy));
4070 }
4071 mcmd->tmr_func = fn;
4072 mcmd->flags = flags;
4073 mcmd->reset_count = vha->hw->chip_reset;
4074
4075 switch (fn) {
4076 case QLA_TGT_CLEAR_ACA:
4077 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
4078 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
4079 tmr_func = TMR_CLEAR_ACA;
4080 break;
4081
4082 case QLA_TGT_TARGET_RESET:
4083 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
4084 "qla_target(%d): TARGET_RESET received\n",
4085 sess->vha->vp_idx);
4086 tmr_func = TMR_TARGET_WARM_RESET;
4087 break;
4088
4089 case QLA_TGT_LUN_RESET:
4090 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
4091 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
4092 tmr_func = TMR_LUN_RESET;
4093 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4094 break;
4095
4096 case QLA_TGT_CLEAR_TS:
4097 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
4098 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
4099 tmr_func = TMR_CLEAR_TASK_SET;
4100 break;
4101
4102 case QLA_TGT_ABORT_TS:
4103 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
4104 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
4105 tmr_func = TMR_ABORT_TASK_SET;
4106 break;
4107 #if 0
4108 case QLA_TGT_ABORT_ALL:
4109 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
4110 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
4111 sess->vha->vp_idx);
4112 tmr_func = 0;
4113 break;
4114
4115 case QLA_TGT_ABORT_ALL_SESS:
4116 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
4117 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
4118 sess->vha->vp_idx);
4119 tmr_func = 0;
4120 break;
4121
4122 case QLA_TGT_NEXUS_LOSS_SESS:
4123 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
4124 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
4125 sess->vha->vp_idx);
4126 tmr_func = 0;
4127 break;
4128
4129 case QLA_TGT_NEXUS_LOSS:
4130 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
4131 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
4132 tmr_func = 0;
4133 break;
4134 #endif
4135 default:
4136 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
4137 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
4138 sess->vha->vp_idx, fn);
4139 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4140 return -ENOSYS;
4141 }
4142
4143 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
4144 if (res != 0) {
4145 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4146 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4147 sess->vha->vp_idx, res);
4148 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4149 return -EFAULT;
4150 }
4151
4152 return 0;
4153 }
4154
4155 /* ha->hardware_lock supposed to be held on entry */
4156 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4157 {
4158 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4159 struct qla_hw_data *ha = vha->hw;
4160 struct qla_tgt *tgt;
4161 struct qla_tgt_sess *sess;
4162 uint32_t lun, unpacked_lun;
4163 int fn;
4164 unsigned long flags;
4165
4166 tgt = vha->vha_tgt.qla_tgt;
4167
4168 lun = a->u.isp24.fcp_cmnd.lun;
4169 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4170
4171 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4172 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4173 a->u.isp24.fcp_hdr.s_id);
4174 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4175
4176 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4177
4178 if (!sess) {
4179 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4180 "qla_target(%d): task mgmt fn 0x%x for "
4181 "non-existant session\n", vha->vp_idx, fn);
4182 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4183 sizeof(struct atio_from_isp));
4184 }
4185
4186 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
4187 return -EFAULT;
4188
4189 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4190 }
4191
4192 /* ha->hardware_lock supposed to be held on entry */
4193 static int __qlt_abort_task(struct scsi_qla_host *vha,
4194 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
4195 {
4196 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4197 struct qla_hw_data *ha = vha->hw;
4198 struct qla_tgt_mgmt_cmd *mcmd;
4199 uint32_t lun, unpacked_lun;
4200 int rc;
4201
4202 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4203 if (mcmd == NULL) {
4204 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4205 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4206 vha->vp_idx, __func__);
4207 return -ENOMEM;
4208 }
4209 memset(mcmd, 0, sizeof(*mcmd));
4210
4211 mcmd->sess = sess;
4212 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4213 sizeof(mcmd->orig_iocb.imm_ntfy));
4214
4215 lun = a->u.isp24.fcp_cmnd.lun;
4216 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4217 mcmd->reset_count = vha->hw->chip_reset;
4218
4219 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
4220 le16_to_cpu(iocb->u.isp2x.seq_id));
4221 if (rc != 0) {
4222 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4223 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4224 vha->vp_idx, rc);
4225 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4226 return -EFAULT;
4227 }
4228
4229 return 0;
4230 }
4231
4232 /* ha->hardware_lock supposed to be held on entry */
4233 static int qlt_abort_task(struct scsi_qla_host *vha,
4234 struct imm_ntfy_from_isp *iocb)
4235 {
4236 struct qla_hw_data *ha = vha->hw;
4237 struct qla_tgt_sess *sess;
4238 int loop_id;
4239 unsigned long flags;
4240
4241 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4242
4243 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4244 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4245 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4246
4247 if (sess == NULL) {
4248 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4249 "qla_target(%d): task abort for unexisting "
4250 "session\n", vha->vp_idx);
4251 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4252 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4253 }
4254
4255 return __qlt_abort_task(vha, iocb, sess);
4256 }
4257
4258 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4259 {
4260 if (fcport->tgt_session) {
4261 if (rc != MBS_COMMAND_COMPLETE) {
4262 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4263 "%s: se_sess %p / sess %p from"
4264 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4265 " LOGO failed: %#x\n",
4266 __func__,
4267 fcport->tgt_session->se_sess,
4268 fcport->tgt_session,
4269 fcport->port_name, fcport->loop_id,
4270 fcport->d_id.b.domain, fcport->d_id.b.area,
4271 fcport->d_id.b.al_pa, rc);
4272 }
4273
4274 fcport->tgt_session->logout_completed = 1;
4275 }
4276 }
4277
4278 /*
4279 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4280 *
4281 * Schedules sessions with matching port_id/loop_id but different wwn for
4282 * deletion. Returns existing session with matching wwn if present.
4283 * Null otherwise.
4284 */
4285 static struct qla_tgt_sess *
4286 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4287 port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess)
4288 {
4289 struct qla_tgt_sess *sess = NULL, *other_sess;
4290 uint64_t other_wwn;
4291
4292 *conflict_sess = NULL;
4293
4294 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4295
4296 other_wwn = wwn_to_u64(other_sess->port_name);
4297
4298 if (wwn == other_wwn) {
4299 WARN_ON(sess);
4300 sess = other_sess;
4301 continue;
4302 }
4303
4304 /* find other sess with nport_id collision */
4305 if (port_id.b24 == other_sess->s_id.b24) {
4306 if (loop_id != other_sess->loop_id) {
4307 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4308 "Invalidating sess %p loop_id %d wwn %llx.\n",
4309 other_sess, other_sess->loop_id, other_wwn);
4310
4311 /*
4312 * logout_on_delete is set by default, but another
4313 * session that has the same s_id/loop_id combo
4314 * might have cleared it when requested this session
4315 * deletion, so don't touch it
4316 */
4317 qlt_schedule_sess_for_deletion(other_sess, true);
4318 } else {
4319 /*
4320 * Another wwn used to have our s_id/loop_id
4321 * kill the session, but don't free the loop_id
4322 */
4323 other_sess->keep_nport_handle = 1;
4324 *conflict_sess = other_sess;
4325 qlt_schedule_sess_for_deletion(other_sess,
4326 true);
4327 }
4328 continue;
4329 }
4330
4331 /* find other sess with nport handle collision */
4332 if (loop_id == other_sess->loop_id) {
4333 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4334 "Invalidating sess %p loop_id %d wwn %llx.\n",
4335 other_sess, other_sess->loop_id, other_wwn);
4336
4337 /* Same loop_id but different s_id
4338 * Ok to kill and logout */
4339 qlt_schedule_sess_for_deletion(other_sess, true);
4340 }
4341 }
4342
4343 return sess;
4344 }
4345
4346 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4347 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4348 {
4349 struct qla_tgt_sess_op *op;
4350 struct qla_tgt_cmd *cmd;
4351 uint32_t key;
4352 int count = 0;
4353
4354 key = (((u32)s_id->b.domain << 16) |
4355 ((u32)s_id->b.area << 8) |
4356 ((u32)s_id->b.al_pa));
4357
4358 spin_lock(&vha->cmd_list_lock);
4359 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4360 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4361 if (op_key == key) {
4362 op->aborted = true;
4363 count++;
4364 }
4365 }
4366 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4367 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4368 if (cmd_key == key) {
4369 cmd->aborted = 1;
4370 count++;
4371 }
4372 }
4373 spin_unlock(&vha->cmd_list_lock);
4374
4375 return count;
4376 }
4377
4378 /*
4379 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4380 */
4381 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4382 struct imm_ntfy_from_isp *iocb)
4383 {
4384 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4385 struct qla_hw_data *ha = vha->hw;
4386 struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL;
4387 uint64_t wwn;
4388 port_id_t port_id;
4389 uint16_t loop_id;
4390 uint16_t wd3_lo;
4391 int res = 0;
4392 qlt_plogi_ack_t *pla;
4393 unsigned long flags;
4394
4395 wwn = wwn_to_u64(iocb->u.isp24.port_name);
4396
4397 port_id.b.domain = iocb->u.isp24.port_id[2];
4398 port_id.b.area = iocb->u.isp24.port_id[1];
4399 port_id.b.al_pa = iocb->u.isp24.port_id[0];
4400 port_id.b.rsvd_1 = 0;
4401
4402 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4403
4404 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4405 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4406 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4407
4408 /* res = 1 means ack at the end of thread
4409 * res = 0 means ack async/later.
4410 */
4411 switch (iocb->u.isp24.status_subcode) {
4412 case ELS_PLOGI:
4413
4414 /* Mark all stale commands in qla_tgt_wq for deletion */
4415 abort_cmds_for_s_id(vha, &port_id);
4416
4417 if (wwn) {
4418 spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4419 sess = qlt_find_sess_invalidate_other(tgt, wwn,
4420 port_id, loop_id, &conflict_sess);
4421 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4422 }
4423
4424 if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) {
4425 res = 1;
4426 break;
4427 }
4428
4429 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4430 if (!pla) {
4431 qlt_send_term_imm_notif(vha, iocb, 1);
4432
4433 res = 0;
4434 break;
4435 }
4436
4437 res = 0;
4438
4439 if (conflict_sess)
4440 qlt_plogi_ack_link(vha, pla, conflict_sess,
4441 QLT_PLOGI_LINK_CONFLICT);
4442
4443 if (!sess)
4444 break;
4445
4446 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4447 /*
4448 * Under normal circumstances we want to release nport handle
4449 * during LOGO process to avoid nport handle leaks inside FW.
4450 * The exception is when LOGO is done while another PLOGI with
4451 * the same nport handle is waiting as might be the case here.
4452 * Note: there is always a possibily of a race where session
4453 * deletion has already started for other reasons (e.g. ACL
4454 * removal) and now PLOGI arrives:
4455 * 1. if PLOGI arrived in FW after nport handle has been freed,
4456 * FW must have assigned this PLOGI a new/same handle and we
4457 * can proceed ACK'ing it as usual when session deletion
4458 * completes.
4459 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4460 * bit reached it, the handle has now been released. We'll
4461 * get an error when we ACK this PLOGI. Nothing will be sent
4462 * back to initiator. Initiator should eventually retry
4463 * PLOGI and situation will correct itself.
4464 */
4465 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4466 (sess->s_id.b24 == port_id.b24));
4467 qlt_schedule_sess_for_deletion(sess, true);
4468 break;
4469
4470 case ELS_PRLI:
4471 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4472
4473 if (wwn) {
4474 spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4475 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4476 loop_id, &conflict_sess);
4477 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4478 }
4479
4480 if (conflict_sess) {
4481 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4482 "PRLI with conflicting sess %p port %8phC\n",
4483 conflict_sess, conflict_sess->port_name);
4484 qlt_send_term_imm_notif(vha, iocb, 1);
4485 res = 0;
4486 break;
4487 }
4488
4489 if (sess != NULL) {
4490 if (sess->deleted) {
4491 /*
4492 * Impatient initiator sent PRLI before last
4493 * PLOGI could finish. Will force him to re-try,
4494 * while last one finishes.
4495 */
4496 ql_log(ql_log_warn, sess->vha, 0xf095,
4497 "sess %p PRLI received, before plogi ack.\n",
4498 sess);
4499 qlt_send_term_imm_notif(vha, iocb, 1);
4500 res = 0;
4501 break;
4502 }
4503
4504 /*
4505 * This shouldn't happen under normal circumstances,
4506 * since we have deleted the old session during PLOGI
4507 */
4508 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4509 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4510 sess->loop_id, sess, iocb->u.isp24.nport_handle);
4511
4512 sess->local = 0;
4513 sess->loop_id = loop_id;
4514 sess->s_id = port_id;
4515
4516 if (wd3_lo & BIT_7)
4517 sess->conf_compl_supported = 1;
4518
4519 }
4520 res = 1; /* send notify ack */
4521
4522 /* Make session global (not used in fabric mode) */
4523 if (ha->current_topology != ISP_CFG_F) {
4524 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4525 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4526 qla2xxx_wake_dpc(vha);
4527 } else {
4528 /* todo: else - create sess here. */
4529 res = 1; /* send notify ack */
4530 }
4531
4532 break;
4533
4534 case ELS_LOGO:
4535 case ELS_PRLO:
4536 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4537 break;
4538 case ELS_PDISC:
4539 case ELS_ADISC:
4540 {
4541 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4542 if (tgt->link_reinit_iocb_pending) {
4543 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4544 0, 0, 0, 0, 0, 0);
4545 tgt->link_reinit_iocb_pending = 0;
4546 }
4547 res = 1; /* send notify ack */
4548 break;
4549 }
4550
4551 case ELS_FLOGI: /* should never happen */
4552 default:
4553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4554 "qla_target(%d): Unsupported ELS command %x "
4555 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4556 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4557 break;
4558 }
4559
4560 return res;
4561 }
4562
4563 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4564 {
4565 #if 1
4566 /*
4567 * FIXME: Reject non zero SRR relative offset until we can test
4568 * this code properly.
4569 */
4570 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4571 return -1;
4572 #else
4573 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4574 size_t first_offset = 0, rem_offset = offset, tmp = 0;
4575 int i, sg_srr_cnt, bufflen = 0;
4576
4577 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4578 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4579 "cmd->sg_cnt: %u, direction: %d\n",
4580 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4581
4582 if (!cmd->sg || !cmd->sg_cnt) {
4583 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4584 "Missing cmd->sg or zero cmd->sg_cnt in"
4585 " qla_tgt_set_data_offset\n");
4586 return -EINVAL;
4587 }
4588 /*
4589 * Walk the current cmd->sg list until we locate the new sg_srr_start
4590 */
4591 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4592 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4593 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4594 i, sg, sg_page(sg), sg->length, sg->offset);
4595
4596 if ((sg->length + tmp) > offset) {
4597 first_offset = rem_offset;
4598 sg_srr_start = sg;
4599 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4600 "Found matching sg[%d], using %p as sg_srr_start, "
4601 "and using first_offset: %zu\n", i, sg,
4602 first_offset);
4603 break;
4604 }
4605 tmp += sg->length;
4606 rem_offset -= sg->length;
4607 }
4608
4609 if (!sg_srr_start) {
4610 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4611 "Unable to locate sg_srr_start for offset: %u\n", offset);
4612 return -EINVAL;
4613 }
4614 sg_srr_cnt = (cmd->sg_cnt - i);
4615
4616 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4617 if (!sg_srr) {
4618 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4619 "Unable to allocate sgp\n");
4620 return -ENOMEM;
4621 }
4622 sg_init_table(sg_srr, sg_srr_cnt);
4623 sgp = &sg_srr[0];
4624 /*
4625 * Walk the remaining list for sg_srr_start, mapping to the newly
4626 * allocated sg_srr taking first_offset into account.
4627 */
4628 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4629 if (first_offset) {
4630 sg_set_page(sgp, sg_page(sg),
4631 (sg->length - first_offset), first_offset);
4632 first_offset = 0;
4633 } else {
4634 sg_set_page(sgp, sg_page(sg), sg->length, 0);
4635 }
4636 bufflen += sgp->length;
4637
4638 sgp = sg_next(sgp);
4639 if (!sgp)
4640 break;
4641 }
4642
4643 cmd->sg = sg_srr;
4644 cmd->sg_cnt = sg_srr_cnt;
4645 cmd->bufflen = bufflen;
4646 cmd->offset += offset;
4647 cmd->free_sg = 1;
4648
4649 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4650 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4651 cmd->sg_cnt);
4652 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4653 cmd->bufflen);
4654 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4655 cmd->offset);
4656
4657 if (cmd->sg_cnt < 0)
4658 BUG();
4659
4660 if (cmd->bufflen < 0)
4661 BUG();
4662
4663 return 0;
4664 #endif
4665 }
4666
4667 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4668 uint32_t srr_rel_offs, int *xmit_type)
4669 {
4670 int res = 0, rel_offs;
4671
4672 rel_offs = srr_rel_offs - cmd->offset;
4673 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4674 srr_rel_offs, rel_offs);
4675
4676 *xmit_type = QLA_TGT_XMIT_ALL;
4677
4678 if (rel_offs < 0) {
4679 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4680 "qla_target(%d): SRR rel_offs (%d) < 0",
4681 cmd->vha->vp_idx, rel_offs);
4682 res = -1;
4683 } else if (rel_offs == cmd->bufflen)
4684 *xmit_type = QLA_TGT_XMIT_STATUS;
4685 else if (rel_offs > 0)
4686 res = qlt_set_data_offset(cmd, rel_offs);
4687
4688 return res;
4689 }
4690
4691 /* No locks, thread context */
4692 static void qlt_handle_srr(struct scsi_qla_host *vha,
4693 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4694 {
4695 struct imm_ntfy_from_isp *ntfy =
4696 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4697 struct qla_hw_data *ha = vha->hw;
4698 struct qla_tgt_cmd *cmd = sctio->cmd;
4699 struct se_cmd *se_cmd = &cmd->se_cmd;
4700 unsigned long flags;
4701 int xmit_type = 0, resp = 0;
4702 uint32_t offset;
4703 uint16_t srr_ui;
4704
4705 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4706 srr_ui = ntfy->u.isp24.srr_ui;
4707
4708 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4709 cmd, srr_ui);
4710
4711 switch (srr_ui) {
4712 case SRR_IU_STATUS:
4713 spin_lock_irqsave(&ha->hardware_lock, flags);
4714 qlt_send_notify_ack(vha, ntfy,
4715 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4716 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4717 xmit_type = QLA_TGT_XMIT_STATUS;
4718 resp = 1;
4719 break;
4720 case SRR_IU_DATA_IN:
4721 if (!cmd->sg || !cmd->sg_cnt) {
4722 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4723 "Unable to process SRR_IU_DATA_IN due to"
4724 " missing cmd->sg, state: %d\n", cmd->state);
4725 dump_stack();
4726 goto out_reject;
4727 }
4728 if (se_cmd->scsi_status != 0) {
4729 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4730 "Rejecting SRR_IU_DATA_IN with non GOOD "
4731 "scsi_status\n");
4732 goto out_reject;
4733 }
4734 cmd->bufflen = se_cmd->data_length;
4735
4736 if (qlt_has_data(cmd)) {
4737 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4738 goto out_reject;
4739 spin_lock_irqsave(&ha->hardware_lock, flags);
4740 qlt_send_notify_ack(vha, ntfy,
4741 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4742 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4743 resp = 1;
4744 } else {
4745 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4746 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4747 vha->vp_idx, se_cmd->tag,
4748 cmd->se_cmd.scsi_status);
4749 goto out_reject;
4750 }
4751 break;
4752 case SRR_IU_DATA_OUT:
4753 if (!cmd->sg || !cmd->sg_cnt) {
4754 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4755 "Unable to process SRR_IU_DATA_OUT due to"
4756 " missing cmd->sg\n");
4757 dump_stack();
4758 goto out_reject;
4759 }
4760 if (se_cmd->scsi_status != 0) {
4761 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4762 "Rejecting SRR_IU_DATA_OUT"
4763 " with non GOOD scsi_status\n");
4764 goto out_reject;
4765 }
4766 cmd->bufflen = se_cmd->data_length;
4767
4768 if (qlt_has_data(cmd)) {
4769 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4770 goto out_reject;
4771 spin_lock_irqsave(&ha->hardware_lock, flags);
4772 qlt_send_notify_ack(vha, ntfy,
4773 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4774 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4775 if (xmit_type & QLA_TGT_XMIT_DATA) {
4776 cmd->cmd_flags |= BIT_8;
4777 qlt_rdy_to_xfer(cmd);
4778 }
4779 } else {
4780 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4781 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4782 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4783 goto out_reject;
4784 }
4785 break;
4786 default:
4787 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4788 "qla_target(%d): Unknown srr_ui value %x",
4789 vha->vp_idx, srr_ui);
4790 goto out_reject;
4791 }
4792
4793 /* Transmit response in case of status and data-in cases */
4794 if (resp) {
4795 cmd->cmd_flags |= BIT_7;
4796 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4797 }
4798
4799 return;
4800
4801 out_reject:
4802 spin_lock_irqsave(&ha->hardware_lock, flags);
4803 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4804 NOTIFY_ACK_SRR_FLAGS_REJECT,
4805 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4806 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4807 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4808 cmd->state = QLA_TGT_STATE_DATA_IN;
4809 dump_stack();
4810 } else {
4811 cmd->cmd_flags |= BIT_9;
4812 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
4813 }
4814 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4815 }
4816
4817 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4818 struct qla_tgt_srr_imm *imm, int ha_locked)
4819 {
4820 struct qla_hw_data *ha = vha->hw;
4821 unsigned long flags = 0;
4822
4823 #ifndef __CHECKER__
4824 if (!ha_locked)
4825 spin_lock_irqsave(&ha->hardware_lock, flags);
4826 #endif
4827
4828 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4829 NOTIFY_ACK_SRR_FLAGS_REJECT,
4830 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4831 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4832
4833 #ifndef __CHECKER__
4834 if (!ha_locked)
4835 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4836 #endif
4837
4838 kfree(imm);
4839 }
4840
4841 static void qlt_handle_srr_work(struct work_struct *work)
4842 {
4843 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4844 struct scsi_qla_host *vha = tgt->vha;
4845 struct qla_tgt_srr_ctio *sctio;
4846 unsigned long flags;
4847
4848 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4849 tgt);
4850
4851 restart:
4852 spin_lock_irqsave(&tgt->srr_lock, flags);
4853 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4854 struct qla_tgt_srr_imm *imm, *i, *ti;
4855 struct qla_tgt_cmd *cmd;
4856 struct se_cmd *se_cmd;
4857
4858 imm = NULL;
4859 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4860 srr_list_entry) {
4861 if (i->srr_id == sctio->srr_id) {
4862 list_del(&i->srr_list_entry);
4863 if (imm) {
4864 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4865 "qla_target(%d): There must be "
4866 "only one IMM SRR per CTIO SRR "
4867 "(IMM SRR %p, id %d, CTIO %p\n",
4868 vha->vp_idx, i, i->srr_id, sctio);
4869 qlt_reject_free_srr_imm(tgt->vha, i, 0);
4870 } else
4871 imm = i;
4872 }
4873 }
4874
4875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4876 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4877 sctio->srr_id);
4878
4879 if (imm == NULL) {
4880 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4881 "Not found matching IMM for SRR CTIO (id %d)\n",
4882 sctio->srr_id);
4883 continue;
4884 } else
4885 list_del(&sctio->srr_list_entry);
4886
4887 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4888
4889 cmd = sctio->cmd;
4890 /*
4891 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4892 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4893 * logic..
4894 */
4895 cmd->offset = 0;
4896 if (cmd->free_sg) {
4897 kfree(cmd->sg);
4898 cmd->sg = NULL;
4899 cmd->free_sg = 0;
4900 }
4901 se_cmd = &cmd->se_cmd;
4902
4903 cmd->sg_cnt = se_cmd->t_data_nents;
4904 cmd->sg = se_cmd->t_data_sg;
4905
4906 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4907 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4908 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4909 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4910
4911 qlt_handle_srr(vha, sctio, imm);
4912
4913 kfree(imm);
4914 kfree(sctio);
4915 goto restart;
4916 }
4917 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4918 }
4919
4920 /* ha->hardware_lock supposed to be held on entry */
4921 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4922 struct imm_ntfy_from_isp *iocb)
4923 {
4924 struct qla_tgt_srr_imm *imm;
4925 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4926 struct qla_tgt_srr_ctio *sctio;
4927
4928 tgt->imm_srr_id++;
4929
4930 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4931 vha->vp_idx);
4932
4933 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4934 if (imm != NULL) {
4935 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4936
4937 /* IRQ is already OFF */
4938 spin_lock(&tgt->srr_lock);
4939 imm->srr_id = tgt->imm_srr_id;
4940 list_add_tail(&imm->srr_list_entry,
4941 &tgt->srr_imm_list);
4942 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4943 "IMM NTFY SRR %p added (id %d, ui %x)\n",
4944 imm, imm->srr_id, iocb->u.isp24.srr_ui);
4945 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4946 int found = 0;
4947 list_for_each_entry(sctio, &tgt->srr_ctio_list,
4948 srr_list_entry) {
4949 if (sctio->srr_id == imm->srr_id) {
4950 found = 1;
4951 break;
4952 }
4953 }
4954 if (found) {
4955 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4956 "Scheduling srr work\n");
4957 schedule_work(&tgt->srr_work);
4958 } else {
4959 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4960 "qla_target(%d): imm_srr_id "
4961 "== ctio_srr_id (%d), but there is no "
4962 "corresponding SRR CTIO, deleting IMM "
4963 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4964 imm);
4965 list_del(&imm->srr_list_entry);
4966
4967 kfree(imm);
4968
4969 spin_unlock(&tgt->srr_lock);
4970 goto out_reject;
4971 }
4972 }
4973 spin_unlock(&tgt->srr_lock);
4974 } else {
4975 struct qla_tgt_srr_ctio *ts;
4976
4977 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4978 "qla_target(%d): Unable to allocate SRR IMM "
4979 "entry, SRR request will be rejected\n", vha->vp_idx);
4980
4981 /* IRQ is already OFF */
4982 spin_lock(&tgt->srr_lock);
4983 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4984 srr_list_entry) {
4985 if (sctio->srr_id == tgt->imm_srr_id) {
4986 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4987 "CTIO SRR %p deleted (id %d)\n",
4988 sctio, sctio->srr_id);
4989 list_del(&sctio->srr_list_entry);
4990 qlt_send_term_exchange(vha, sctio->cmd,
4991 &sctio->cmd->atio, 1, 0);
4992 kfree(sctio);
4993 }
4994 }
4995 spin_unlock(&tgt->srr_lock);
4996 goto out_reject;
4997 }
4998
4999 return;
5000
5001 out_reject:
5002 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
5003 NOTIFY_ACK_SRR_FLAGS_REJECT,
5004 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
5005 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
5006 }
5007
5008 /*
5009 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5010 */
5011 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5012 struct imm_ntfy_from_isp *iocb)
5013 {
5014 struct qla_hw_data *ha = vha->hw;
5015 uint32_t add_flags = 0;
5016 int send_notify_ack = 1;
5017 uint16_t status;
5018
5019 status = le16_to_cpu(iocb->u.isp2x.status);
5020 switch (status) {
5021 case IMM_NTFY_LIP_RESET:
5022 {
5023 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5024 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5025 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5026 iocb->u.isp24.status_subcode);
5027
5028 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5029 send_notify_ack = 0;
5030 break;
5031 }
5032
5033 case IMM_NTFY_LIP_LINK_REINIT:
5034 {
5035 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5036 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5037 "qla_target(%d): LINK REINIT (loop %#x, "
5038 "subcode %x)\n", vha->vp_idx,
5039 le16_to_cpu(iocb->u.isp24.nport_handle),
5040 iocb->u.isp24.status_subcode);
5041 if (tgt->link_reinit_iocb_pending) {
5042 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
5043 0, 0, 0, 0, 0, 0);
5044 }
5045 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5046 tgt->link_reinit_iocb_pending = 1;
5047 /*
5048 * QLogic requires to wait after LINK REINIT for possible
5049 * PDISC or ADISC ELS commands
5050 */
5051 send_notify_ack = 0;
5052 break;
5053 }
5054
5055 case IMM_NTFY_PORT_LOGOUT:
5056 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5057 "qla_target(%d): Port logout (loop "
5058 "%#x, subcode %x)\n", vha->vp_idx,
5059 le16_to_cpu(iocb->u.isp24.nport_handle),
5060 iocb->u.isp24.status_subcode);
5061
5062 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5063 send_notify_ack = 0;
5064 /* The sessions will be cleared in the callback, if needed */
5065 break;
5066
5067 case IMM_NTFY_GLBL_TPRLO:
5068 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5069 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5070 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5071 send_notify_ack = 0;
5072 /* The sessions will be cleared in the callback, if needed */
5073 break;
5074
5075 case IMM_NTFY_PORT_CONFIG:
5076 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5077 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5078 status);
5079 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5080 send_notify_ack = 0;
5081 /* The sessions will be cleared in the callback, if needed */
5082 break;
5083
5084 case IMM_NTFY_GLBL_LOGO:
5085 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5086 "qla_target(%d): Link failure detected\n",
5087 vha->vp_idx);
5088 /* I_T nexus loss */
5089 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5090 send_notify_ack = 0;
5091 break;
5092
5093 case IMM_NTFY_IOCB_OVERFLOW:
5094 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5095 "qla_target(%d): Cannot provide requested "
5096 "capability (IOCB overflowed the immediate notify "
5097 "resource count)\n", vha->vp_idx);
5098 break;
5099
5100 case IMM_NTFY_ABORT_TASK:
5101 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5102 "qla_target(%d): Abort Task (S %08x I %#x -> "
5103 "L %#x)\n", vha->vp_idx,
5104 le16_to_cpu(iocb->u.isp2x.seq_id),
5105 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5106 le16_to_cpu(iocb->u.isp2x.lun));
5107 if (qlt_abort_task(vha, iocb) == 0)
5108 send_notify_ack = 0;
5109 break;
5110
5111 case IMM_NTFY_RESOURCE:
5112 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5113 "qla_target(%d): Out of resources, host %ld\n",
5114 vha->vp_idx, vha->host_no);
5115 break;
5116
5117 case IMM_NTFY_MSG_RX:
5118 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5119 "qla_target(%d): Immediate notify task %x\n",
5120 vha->vp_idx, iocb->u.isp2x.task_flags);
5121 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5122 send_notify_ack = 0;
5123 break;
5124
5125 case IMM_NTFY_ELS:
5126 if (qlt_24xx_handle_els(vha, iocb) == 0)
5127 send_notify_ack = 0;
5128 break;
5129
5130 case IMM_NTFY_SRR:
5131 qlt_prepare_srr_imm(vha, iocb);
5132 send_notify_ack = 0;
5133 break;
5134
5135 default:
5136 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5137 "qla_target(%d): Received unknown immediate "
5138 "notify status %x\n", vha->vp_idx, status);
5139 break;
5140 }
5141
5142 if (send_notify_ack)
5143 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
5144 }
5145
5146 /*
5147 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5148 * This function sends busy to ISP 2xxx or 24xx.
5149 */
5150 static int __qlt_send_busy(struct scsi_qla_host *vha,
5151 struct atio_from_isp *atio, uint16_t status)
5152 {
5153 struct ctio7_to_24xx *ctio24;
5154 struct qla_hw_data *ha = vha->hw;
5155 request_t *pkt;
5156 struct qla_tgt_sess *sess = NULL;
5157 unsigned long flags;
5158
5159 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5160 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5161 atio->u.isp24.fcp_hdr.s_id);
5162 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5163 if (!sess) {
5164 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5165 return 0;
5166 }
5167 /* Sending marker isn't necessary, since we called from ISR */
5168
5169 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
5170 if (!pkt) {
5171 ql_dbg(ql_dbg_io, vha, 0x3063,
5172 "qla_target(%d): %s failed: unable to allocate "
5173 "request packet", vha->vp_idx, __func__);
5174 return -ENOMEM;
5175 }
5176
5177 vha->tgt_counters.num_q_full_sent++;
5178 pkt->entry_count = 1;
5179 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5180
5181 ctio24 = (struct ctio7_to_24xx *)pkt;
5182 ctio24->entry_type = CTIO_TYPE7;
5183 ctio24->nport_handle = sess->loop_id;
5184 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5185 ctio24->vp_index = vha->vp_idx;
5186 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5187 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5188 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5189 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5190 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5191 cpu_to_le16(
5192 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5193 CTIO7_FLAGS_DONT_RET_CTIO);
5194 /*
5195 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5196 * if the explicit conformation is used.
5197 */
5198 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5199 ctio24->u.status1.scsi_status = cpu_to_le16(status);
5200 /* Memory Barrier */
5201 wmb();
5202 qla2x00_start_iocbs(vha, vha->req);
5203 return 0;
5204 }
5205
5206 /*
5207 * This routine is used to allocate a command for either a QFull condition
5208 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5209 * out previously.
5210 */
5211 static void
5212 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5213 struct atio_from_isp *atio, uint16_t status, int qfull)
5214 {
5215 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5216 struct qla_hw_data *ha = vha->hw;
5217 struct qla_tgt_sess *sess;
5218 struct se_session *se_sess;
5219 struct qla_tgt_cmd *cmd;
5220 int tag;
5221
5222 if (unlikely(tgt->tgt_stop)) {
5223 ql_dbg(ql_dbg_io, vha, 0x300a,
5224 "New command while device %p is shutting down\n", tgt);
5225 return;
5226 }
5227
5228 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5229 vha->hw->tgt.num_qfull_cmds_dropped++;
5230 if (vha->hw->tgt.num_qfull_cmds_dropped >
5231 vha->qla_stats.stat_max_qfull_cmds_dropped)
5232 vha->qla_stats.stat_max_qfull_cmds_dropped =
5233 vha->hw->tgt.num_qfull_cmds_dropped;
5234
5235 ql_dbg(ql_dbg_io, vha, 0x3068,
5236 "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5237 vha->vp_idx, __func__,
5238 vha->hw->tgt.num_qfull_cmds_dropped);
5239
5240 qlt_chk_exch_leak_thresh_hold(vha);
5241 return;
5242 }
5243
5244 sess = ha->tgt.tgt_ops->find_sess_by_s_id
5245 (vha, atio->u.isp24.fcp_hdr.s_id);
5246 if (!sess)
5247 return;
5248
5249 se_sess = sess->se_sess;
5250
5251 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5252 if (tag < 0)
5253 return;
5254
5255 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5256 if (!cmd) {
5257 ql_dbg(ql_dbg_io, vha, 0x3009,
5258 "qla_target(%d): %s: Allocation of cmd failed\n",
5259 vha->vp_idx, __func__);
5260
5261 vha->hw->tgt.num_qfull_cmds_dropped++;
5262 if (vha->hw->tgt.num_qfull_cmds_dropped >
5263 vha->qla_stats.stat_max_qfull_cmds_dropped)
5264 vha->qla_stats.stat_max_qfull_cmds_dropped =
5265 vha->hw->tgt.num_qfull_cmds_dropped;
5266
5267 qlt_chk_exch_leak_thresh_hold(vha);
5268 return;
5269 }
5270
5271 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5272
5273 qlt_incr_num_pend_cmds(vha);
5274 INIT_LIST_HEAD(&cmd->cmd_list);
5275 memcpy(&cmd->atio, atio, sizeof(*atio));
5276
5277 cmd->tgt = vha->vha_tgt.qla_tgt;
5278 cmd->vha = vha;
5279 cmd->reset_count = vha->hw->chip_reset;
5280 cmd->q_full = 1;
5281
5282 if (qfull) {
5283 cmd->q_full = 1;
5284 /* NOTE: borrowing the state field to carry the status */
5285 cmd->state = status;
5286 } else
5287 cmd->term_exchg = 1;
5288
5289 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5290
5291 vha->hw->tgt.num_qfull_cmds_alloc++;
5292 if (vha->hw->tgt.num_qfull_cmds_alloc >
5293 vha->qla_stats.stat_max_qfull_cmds_alloc)
5294 vha->qla_stats.stat_max_qfull_cmds_alloc =
5295 vha->hw->tgt.num_qfull_cmds_alloc;
5296 }
5297
5298 int
5299 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5300 {
5301 struct qla_hw_data *ha = vha->hw;
5302 unsigned long flags;
5303 struct qla_tgt_cmd *cmd, *tcmd;
5304 struct list_head free_list;
5305 int rc = 0;
5306
5307 if (list_empty(&ha->tgt.q_full_list))
5308 return 0;
5309
5310 INIT_LIST_HEAD(&free_list);
5311
5312 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5313
5314 if (list_empty(&ha->tgt.q_full_list)) {
5315 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5316 return 0;
5317 }
5318
5319 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5320 if (cmd->q_full)
5321 /* cmd->state is a borrowed field to hold status */
5322 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5323 else if (cmd->term_exchg)
5324 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5325
5326 if (rc == -ENOMEM)
5327 break;
5328
5329 if (cmd->q_full)
5330 ql_dbg(ql_dbg_io, vha, 0x3006,
5331 "%s: busy sent for ox_id[%04x]\n", __func__,
5332 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5333 else if (cmd->term_exchg)
5334 ql_dbg(ql_dbg_io, vha, 0x3007,
5335 "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5336 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5337 else
5338 ql_dbg(ql_dbg_io, vha, 0x3008,
5339 "%s: Unexpected cmd in QFull list %p\n", __func__,
5340 cmd);
5341
5342 list_del(&cmd->cmd_list);
5343 list_add_tail(&cmd->cmd_list, &free_list);
5344
5345 /* piggy back on hardware_lock for protection */
5346 vha->hw->tgt.num_qfull_cmds_alloc--;
5347 }
5348 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5349
5350 cmd = NULL;
5351
5352 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5353 list_del(&cmd->cmd_list);
5354 /* This cmd was never sent to TCM. There is no need
5355 * to schedule free or call free_cmd
5356 */
5357 qlt_free_cmd(cmd);
5358 }
5359 return rc;
5360 }
5361
5362 static void
5363 qlt_send_busy(struct scsi_qla_host *vha,
5364 struct atio_from_isp *atio, uint16_t status)
5365 {
5366 int rc = 0;
5367
5368 rc = __qlt_send_busy(vha, atio, status);
5369 if (rc == -ENOMEM)
5370 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5371 }
5372
5373 static int
5374 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5375 struct atio_from_isp *atio)
5376 {
5377 struct qla_hw_data *ha = vha->hw;
5378 uint16_t status;
5379
5380 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5381 return 0;
5382
5383 status = temp_sam_status;
5384 qlt_send_busy(vha, atio, status);
5385 return 1;
5386 }
5387
5388 /* ha->hardware_lock supposed to be held on entry */
5389 /* called via callback from qla2xxx */
5390 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5391 struct atio_from_isp *atio, uint8_t ha_locked)
5392 {
5393 struct qla_hw_data *ha = vha->hw;
5394 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5395 int rc;
5396 unsigned long flags;
5397
5398 if (unlikely(tgt == NULL)) {
5399 ql_dbg(ql_dbg_io, vha, 0x3064,
5400 "ATIO pkt, but no tgt (ha %p)", ha);
5401 return;
5402 }
5403 /*
5404 * In tgt_stop mode we also should allow all requests to pass.
5405 * Otherwise, some commands can stuck.
5406 */
5407
5408 tgt->atio_irq_cmd_count++;
5409
5410 switch (atio->u.raw.entry_type) {
5411 case ATIO_TYPE7:
5412 if (unlikely(atio->u.isp24.exchange_addr ==
5413 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5414 ql_dbg(ql_dbg_io, vha, 0x3065,
5415 "qla_target(%d): ATIO_TYPE7 "
5416 "received with UNKNOWN exchange address, "
5417 "sending QUEUE_FULL\n", vha->vp_idx);
5418 if (!ha_locked)
5419 spin_lock_irqsave(&ha->hardware_lock, flags);
5420 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5421 if (!ha_locked)
5422 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5423 break;
5424 }
5425
5426
5427
5428 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5429 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5430 if (rc != 0) {
5431 tgt->atio_irq_cmd_count--;
5432 return;
5433 }
5434 rc = qlt_handle_cmd_for_atio(vha, atio);
5435 } else {
5436 rc = qlt_handle_task_mgmt(vha, atio);
5437 }
5438 if (unlikely(rc != 0)) {
5439 if (rc == -ESRCH) {
5440 if (!ha_locked)
5441 spin_lock_irqsave
5442 (&ha->hardware_lock, flags);
5443
5444 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5445 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5446 #else
5447 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5448 #endif
5449
5450 if (!ha_locked)
5451 spin_unlock_irqrestore
5452 (&ha->hardware_lock, flags);
5453
5454 } else {
5455 if (tgt->tgt_stop) {
5456 ql_dbg(ql_dbg_tgt, vha, 0xe059,
5457 "qla_target: Unable to send "
5458 "command to target for req, "
5459 "ignoring.\n");
5460 } else {
5461 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5462 "qla_target(%d): Unable to send "
5463 "command to target, sending BUSY "
5464 "status.\n", vha->vp_idx);
5465 if (!ha_locked)
5466 spin_lock_irqsave(
5467 &ha->hardware_lock, flags);
5468 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5469 if (!ha_locked)
5470 spin_unlock_irqrestore(
5471 &ha->hardware_lock, flags);
5472 }
5473 }
5474 }
5475 break;
5476
5477 case IMMED_NOTIFY_TYPE:
5478 {
5479 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5480 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5481 "qla_target(%d): Received ATIO packet %x "
5482 "with error status %x\n", vha->vp_idx,
5483 atio->u.raw.entry_type,
5484 atio->u.isp2x.entry_status);
5485 break;
5486 }
5487 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5488
5489 if (!ha_locked)
5490 spin_lock_irqsave(&ha->hardware_lock, flags);
5491 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5492 if (!ha_locked)
5493 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5494 break;
5495 }
5496
5497 default:
5498 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5499 "qla_target(%d): Received unknown ATIO atio "
5500 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5501 break;
5502 }
5503
5504 tgt->atio_irq_cmd_count--;
5505 }
5506
5507 /* ha->hardware_lock supposed to be held on entry */
5508 /* called via callback from qla2xxx */
5509 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5510 {
5511 struct qla_hw_data *ha = vha->hw;
5512 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5513
5514 if (unlikely(tgt == NULL)) {
5515 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5516 "qla_target(%d): Response pkt %x received, but no "
5517 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5518 return;
5519 }
5520
5521 /*
5522 * In tgt_stop mode we also should allow all requests to pass.
5523 * Otherwise, some commands can stuck.
5524 */
5525
5526 tgt->irq_cmd_count++;
5527
5528 switch (pkt->entry_type) {
5529 case CTIO_CRC2:
5530 case CTIO_TYPE7:
5531 {
5532 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5533 qlt_do_ctio_completion(vha, entry->handle,
5534 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5535 entry);
5536 break;
5537 }
5538
5539 case ACCEPT_TGT_IO_TYPE:
5540 {
5541 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5542 int rc;
5543 if (atio->u.isp2x.status !=
5544 cpu_to_le16(ATIO_CDB_VALID)) {
5545 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5546 "qla_target(%d): ATIO with error "
5547 "status %x received\n", vha->vp_idx,
5548 le16_to_cpu(atio->u.isp2x.status));
5549 break;
5550 }
5551
5552 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5553 if (rc != 0) {
5554 tgt->irq_cmd_count--;
5555 return;
5556 }
5557
5558 rc = qlt_handle_cmd_for_atio(vha, atio);
5559 if (unlikely(rc != 0)) {
5560 if (rc == -ESRCH) {
5561 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5562 qlt_send_busy(vha, atio, 0);
5563 #else
5564 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5565 #endif
5566 } else {
5567 if (tgt->tgt_stop) {
5568 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5569 "qla_target: Unable to send "
5570 "command to target, sending TERM "
5571 "EXCHANGE for rsp\n");
5572 qlt_send_term_exchange(vha, NULL,
5573 atio, 1, 0);
5574 } else {
5575 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5576 "qla_target(%d): Unable to send "
5577 "command to target, sending BUSY "
5578 "status\n", vha->vp_idx);
5579 qlt_send_busy(vha, atio, 0);
5580 }
5581 }
5582 }
5583 }
5584 break;
5585
5586 case CONTINUE_TGT_IO_TYPE:
5587 {
5588 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5589 qlt_do_ctio_completion(vha, entry->handle,
5590 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5591 entry);
5592 break;
5593 }
5594
5595 case CTIO_A64_TYPE:
5596 {
5597 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5598 qlt_do_ctio_completion(vha, entry->handle,
5599 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5600 entry);
5601 break;
5602 }
5603
5604 case IMMED_NOTIFY_TYPE:
5605 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5606 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5607 break;
5608
5609 case NOTIFY_ACK_TYPE:
5610 if (tgt->notify_ack_expected > 0) {
5611 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5612 ql_dbg(ql_dbg_tgt, vha, 0xe036,
5613 "NOTIFY_ACK seq %08x status %x\n",
5614 le16_to_cpu(entry->u.isp2x.seq_id),
5615 le16_to_cpu(entry->u.isp2x.status));
5616 tgt->notify_ack_expected--;
5617 if (entry->u.isp2x.status !=
5618 cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5619 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5620 "qla_target(%d): NOTIFY_ACK "
5621 "failed %x\n", vha->vp_idx,
5622 le16_to_cpu(entry->u.isp2x.status));
5623 }
5624 } else {
5625 ql_dbg(ql_dbg_tgt, vha, 0xe062,
5626 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5627 vha->vp_idx);
5628 }
5629 break;
5630
5631 case ABTS_RECV_24XX:
5632 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5633 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5634 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5635 break;
5636
5637 case ABTS_RESP_24XX:
5638 if (tgt->abts_resp_expected > 0) {
5639 struct abts_resp_from_24xx_fw *entry =
5640 (struct abts_resp_from_24xx_fw *)pkt;
5641 ql_dbg(ql_dbg_tgt, vha, 0xe038,
5642 "ABTS_RESP_24XX: compl_status %x\n",
5643 entry->compl_status);
5644 tgt->abts_resp_expected--;
5645 if (le16_to_cpu(entry->compl_status) !=
5646 ABTS_RESP_COMPL_SUCCESS) {
5647 if ((entry->error_subcode1 == 0x1E) &&
5648 (entry->error_subcode2 == 0)) {
5649 /*
5650 * We've got a race here: aborted
5651 * exchange not terminated, i.e.
5652 * response for the aborted command was
5653 * sent between the abort request was
5654 * received and processed.
5655 * Unfortunately, the firmware has a
5656 * silly requirement that all aborted
5657 * exchanges must be explicitely
5658 * terminated, otherwise it refuses to
5659 * send responses for the abort
5660 * requests. So, we have to
5661 * (re)terminate the exchange and retry
5662 * the abort response.
5663 */
5664 qlt_24xx_retry_term_exchange(vha,
5665 entry);
5666 } else
5667 ql_dbg(ql_dbg_tgt, vha, 0xe063,
5668 "qla_target(%d): ABTS_RESP_24XX "
5669 "failed %x (subcode %x:%x)",
5670 vha->vp_idx, entry->compl_status,
5671 entry->error_subcode1,
5672 entry->error_subcode2);
5673 }
5674 } else {
5675 ql_dbg(ql_dbg_tgt, vha, 0xe064,
5676 "qla_target(%d): Unexpected ABTS_RESP_24XX "
5677 "received\n", vha->vp_idx);
5678 }
5679 break;
5680
5681 default:
5682 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5683 "qla_target(%d): Received unknown response pkt "
5684 "type %x\n", vha->vp_idx, pkt->entry_type);
5685 break;
5686 }
5687
5688 tgt->irq_cmd_count--;
5689 }
5690
5691 /*
5692 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5693 */
5694 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5695 uint16_t *mailbox)
5696 {
5697 struct qla_hw_data *ha = vha->hw;
5698 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5699 int login_code;
5700
5701 if (!ha->tgt.tgt_ops)
5702 return;
5703
5704 if (unlikely(tgt == NULL)) {
5705 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5706 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5707 return;
5708 }
5709
5710 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5711 IS_QLA2100(ha))
5712 return;
5713 /*
5714 * In tgt_stop mode we also should allow all requests to pass.
5715 * Otherwise, some commands can stuck.
5716 */
5717
5718 tgt->irq_cmd_count++;
5719
5720 switch (code) {
5721 case MBA_RESET: /* Reset */
5722 case MBA_SYSTEM_ERR: /* System Error */
5723 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
5724 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
5725 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5726 "qla_target(%d): System error async event %#x "
5727 "occurred", vha->vp_idx, code);
5728 break;
5729 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
5730 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5731 break;
5732
5733 case MBA_LOOP_UP:
5734 {
5735 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5736 "qla_target(%d): Async LOOP_UP occurred "
5737 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5738 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5739 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5740 if (tgt->link_reinit_iocb_pending) {
5741 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5742 0, 0, 0, 0, 0, 0);
5743 tgt->link_reinit_iocb_pending = 0;
5744 }
5745 break;
5746 }
5747
5748 case MBA_LIP_OCCURRED:
5749 case MBA_LOOP_DOWN:
5750 case MBA_LIP_RESET:
5751 case MBA_RSCN_UPDATE:
5752 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5753 "qla_target(%d): Async event %#x occurred "
5754 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5755 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5756 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5757 break;
5758
5759 case MBA_PORT_UPDATE:
5760 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5761 "qla_target(%d): Port update async event %#x "
5762 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5763 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5764 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5765 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5766
5767 login_code = le16_to_cpu(mailbox[2]);
5768 if (login_code == 0x4)
5769 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5770 "Async MB 2: Got PLOGI Complete\n");
5771 else if (login_code == 0x7)
5772 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5773 "Async MB 2: Port Logged Out\n");
5774 break;
5775
5776 default:
5777 break;
5778 }
5779
5780 tgt->irq_cmd_count--;
5781 }
5782
5783 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5784 uint16_t loop_id)
5785 {
5786 fc_port_t *fcport;
5787 int rc;
5788
5789 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5790 if (!fcport) {
5791 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5792 "qla_target(%d): Allocation of tmp FC port failed",
5793 vha->vp_idx);
5794 return NULL;
5795 }
5796
5797 fcport->loop_id = loop_id;
5798
5799 rc = qla2x00_get_port_database(vha, fcport, 0);
5800 if (rc != QLA_SUCCESS) {
5801 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5802 "qla_target(%d): Failed to retrieve fcport "
5803 "information -- get_port_database() returned %x "
5804 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5805 kfree(fcport);
5806 return NULL;
5807 }
5808
5809 return fcport;
5810 }
5811
5812 /* Must be called under tgt_mutex */
5813 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5814 uint8_t *s_id)
5815 {
5816 struct qla_tgt_sess *sess = NULL;
5817 fc_port_t *fcport = NULL;
5818 int rc, global_resets;
5819 uint16_t loop_id = 0;
5820
5821 mutex_lock(&vha->vha_tgt.tgt_mutex);
5822
5823 retry:
5824 global_resets =
5825 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5826
5827 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5828 if (rc != 0) {
5829 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5830
5831 if ((s_id[0] == 0xFF) &&
5832 (s_id[1] == 0xFC)) {
5833 /*
5834 * This is Domain Controller, so it should be
5835 * OK to drop SCSI commands from it.
5836 */
5837 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5838 "Unable to find initiator with S_ID %x:%x:%x",
5839 s_id[0], s_id[1], s_id[2]);
5840 } else
5841 ql_log(ql_log_info, vha, 0xf071,
5842 "qla_target(%d): Unable to find "
5843 "initiator with S_ID %x:%x:%x",
5844 vha->vp_idx, s_id[0], s_id[1],
5845 s_id[2]);
5846
5847 if (rc == -ENOENT) {
5848 qlt_port_logo_t logo;
5849 sid_to_portid(s_id, &logo.id);
5850 logo.cmd_count = 1;
5851 qlt_send_first_logo(vha, &logo);
5852 }
5853
5854 return NULL;
5855 }
5856
5857 fcport = qlt_get_port_database(vha, loop_id);
5858 if (!fcport) {
5859 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5860 return NULL;
5861 }
5862
5863 if (global_resets !=
5864 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5865 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5866 "qla_target(%d): global reset during session discovery "
5867 "(counter was %d, new %d), retrying", vha->vp_idx,
5868 global_resets,
5869 atomic_read(&vha->vha_tgt.
5870 qla_tgt->tgt_global_resets_count));
5871 goto retry;
5872 }
5873
5874 sess = qlt_create_sess(vha, fcport, true);
5875
5876 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5877
5878 kfree(fcport);
5879 return sess;
5880 }
5881
5882 static void qlt_abort_work(struct qla_tgt *tgt,
5883 struct qla_tgt_sess_work_param *prm)
5884 {
5885 struct scsi_qla_host *vha = tgt->vha;
5886 struct qla_hw_data *ha = vha->hw;
5887 struct qla_tgt_sess *sess = NULL;
5888 unsigned long flags = 0, flags2 = 0;
5889 uint32_t be_s_id;
5890 uint8_t s_id[3];
5891 int rc;
5892
5893 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5894
5895 if (tgt->tgt_stop)
5896 goto out_term2;
5897
5898 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5899 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5900 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5901
5902 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5903 (unsigned char *)&be_s_id);
5904 if (!sess) {
5905 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5906
5907 sess = qlt_make_local_sess(vha, s_id);
5908 /* sess has got an extra creation ref */
5909
5910 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5911 if (!sess)
5912 goto out_term2;
5913 } else {
5914 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5915 sess = NULL;
5916 goto out_term2;
5917 }
5918
5919 kref_get(&sess->sess_kref);
5920 }
5921
5922 spin_lock_irqsave(&ha->hardware_lock, flags);
5923
5924 if (tgt->tgt_stop)
5925 goto out_term;
5926
5927 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5928 if (rc != 0)
5929 goto out_term;
5930 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5931
5932 qlt_put_sess(sess);
5933 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5934 return;
5935
5936 out_term2:
5937 spin_lock_irqsave(&ha->hardware_lock, flags);
5938
5939 out_term:
5940 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5941 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5942
5943 qlt_put_sess(sess);
5944 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5945 }
5946
5947 static void qlt_tmr_work(struct qla_tgt *tgt,
5948 struct qla_tgt_sess_work_param *prm)
5949 {
5950 struct atio_from_isp *a = &prm->tm_iocb2;
5951 struct scsi_qla_host *vha = tgt->vha;
5952 struct qla_hw_data *ha = vha->hw;
5953 struct qla_tgt_sess *sess = NULL;
5954 unsigned long flags;
5955 uint8_t *s_id = NULL; /* to hide compiler warnings */
5956 int rc;
5957 uint32_t lun, unpacked_lun;
5958 int fn;
5959 void *iocb;
5960
5961 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5962
5963 if (tgt->tgt_stop)
5964 goto out_term;
5965
5966 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5967 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5968 if (!sess) {
5969 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5970
5971 sess = qlt_make_local_sess(vha, s_id);
5972 /* sess has got an extra creation ref */
5973
5974 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5975 if (!sess)
5976 goto out_term;
5977 } else {
5978 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5979 sess = NULL;
5980 goto out_term;
5981 }
5982
5983 kref_get(&sess->sess_kref);
5984 }
5985
5986 iocb = a;
5987 lun = a->u.isp24.fcp_cmnd.lun;
5988 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5989 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5990
5991 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5992 if (rc != 0)
5993 goto out_term;
5994
5995 qlt_put_sess(sess);
5996 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5997 return;
5998
5999 out_term:
6000 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
6001 qlt_put_sess(sess);
6002 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6003 }
6004
6005 static void qlt_sess_work_fn(struct work_struct *work)
6006 {
6007 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6008 struct scsi_qla_host *vha = tgt->vha;
6009 unsigned long flags;
6010
6011 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6012
6013 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6014 while (!list_empty(&tgt->sess_works_list)) {
6015 struct qla_tgt_sess_work_param *prm = list_entry(
6016 tgt->sess_works_list.next, typeof(*prm),
6017 sess_works_list_entry);
6018
6019 /*
6020 * This work can be scheduled on several CPUs at time, so we
6021 * must delete the entry to eliminate double processing
6022 */
6023 list_del(&prm->sess_works_list_entry);
6024
6025 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6026
6027 switch (prm->type) {
6028 case QLA_TGT_SESS_WORK_ABORT:
6029 qlt_abort_work(tgt, prm);
6030 break;
6031 case QLA_TGT_SESS_WORK_TM:
6032 qlt_tmr_work(tgt, prm);
6033 break;
6034 default:
6035 BUG_ON(1);
6036 break;
6037 }
6038
6039 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6040
6041 kfree(prm);
6042 }
6043 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6044 }
6045
6046 /* Must be called under tgt_host_action_mutex */
6047 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6048 {
6049 struct qla_tgt *tgt;
6050
6051 if (!QLA_TGT_MODE_ENABLED())
6052 return 0;
6053
6054 if (!IS_TGT_MODE_CAPABLE(ha)) {
6055 ql_log(ql_log_warn, base_vha, 0xe070,
6056 "This adapter does not support target mode.\n");
6057 return 0;
6058 }
6059
6060 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6061 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6062
6063 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6064
6065 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6066 if (!tgt) {
6067 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6068 "Unable to allocate struct qla_tgt\n");
6069 return -ENOMEM;
6070 }
6071
6072 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6073 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6074
6075 tgt->ha = ha;
6076 tgt->vha = base_vha;
6077 init_waitqueue_head(&tgt->waitQ);
6078 INIT_LIST_HEAD(&tgt->sess_list);
6079 INIT_LIST_HEAD(&tgt->del_sess_list);
6080 INIT_DELAYED_WORK(&tgt->sess_del_work,
6081 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
6082 spin_lock_init(&tgt->sess_work_lock);
6083 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6084 INIT_LIST_HEAD(&tgt->sess_works_list);
6085 spin_lock_init(&tgt->srr_lock);
6086 INIT_LIST_HEAD(&tgt->srr_ctio_list);
6087 INIT_LIST_HEAD(&tgt->srr_imm_list);
6088 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
6089 atomic_set(&tgt->tgt_global_resets_count, 0);
6090
6091 base_vha->vha_tgt.qla_tgt = tgt;
6092
6093 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6094 "qla_target(%d): using 64 Bit PCI addressing",
6095 base_vha->vp_idx);
6096 tgt->tgt_enable_64bit_addr = 1;
6097 /* 3 is reserved */
6098 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6099 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
6100 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
6101
6102 if (base_vha->fc_vport)
6103 return 0;
6104
6105 mutex_lock(&qla_tgt_mutex);
6106 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6107 mutex_unlock(&qla_tgt_mutex);
6108
6109 return 0;
6110 }
6111
6112 /* Must be called under tgt_host_action_mutex */
6113 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6114 {
6115 if (!vha->vha_tgt.qla_tgt)
6116 return 0;
6117
6118 if (vha->fc_vport) {
6119 qlt_release(vha->vha_tgt.qla_tgt);
6120 return 0;
6121 }
6122
6123 /* free left over qfull cmds */
6124 qlt_init_term_exchange(vha);
6125
6126 mutex_lock(&qla_tgt_mutex);
6127 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6128 mutex_unlock(&qla_tgt_mutex);
6129
6130 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6131 vha->host_no, ha);
6132 qlt_release(vha->vha_tgt.qla_tgt);
6133
6134 return 0;
6135 }
6136
6137 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6138 unsigned char *b)
6139 {
6140 int i;
6141
6142 pr_debug("qla2xxx HW vha->node_name: ");
6143 for (i = 0; i < WWN_SIZE; i++)
6144 pr_debug("%02x ", vha->node_name[i]);
6145 pr_debug("\n");
6146 pr_debug("qla2xxx HW vha->port_name: ");
6147 for (i = 0; i < WWN_SIZE; i++)
6148 pr_debug("%02x ", vha->port_name[i]);
6149 pr_debug("\n");
6150
6151 pr_debug("qla2xxx passed configfs WWPN: ");
6152 put_unaligned_be64(wwpn, b);
6153 for (i = 0; i < WWN_SIZE; i++)
6154 pr_debug("%02x ", b[i]);
6155 pr_debug("\n");
6156 }
6157
6158 /**
6159 * qla_tgt_lport_register - register lport with external module
6160 *
6161 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6162 * @wwpn: Passwd FC target WWPN
6163 * @callback: lport initialization callback for tcm_qla2xxx code
6164 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6165 */
6166 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6167 u64 npiv_wwpn, u64 npiv_wwnn,
6168 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6169 {
6170 struct qla_tgt *tgt;
6171 struct scsi_qla_host *vha;
6172 struct qla_hw_data *ha;
6173 struct Scsi_Host *host;
6174 unsigned long flags;
6175 int rc;
6176 u8 b[WWN_SIZE];
6177
6178 mutex_lock(&qla_tgt_mutex);
6179 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6180 vha = tgt->vha;
6181 ha = vha->hw;
6182
6183 host = vha->host;
6184 if (!host)
6185 continue;
6186
6187 if (!(host->hostt->supported_mode & MODE_TARGET))
6188 continue;
6189
6190 spin_lock_irqsave(&ha->hardware_lock, flags);
6191 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6192 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6193 host->host_no);
6194 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6195 continue;
6196 }
6197 if (tgt->tgt_stop) {
6198 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6199 host->host_no);
6200 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6201 continue;
6202 }
6203 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6204
6205 if (!scsi_host_get(host)) {
6206 ql_dbg(ql_dbg_tgt, vha, 0xe068,
6207 "Unable to scsi_host_get() for"
6208 " qla2xxx scsi_host\n");
6209 continue;
6210 }
6211 qlt_lport_dump(vha, phys_wwpn, b);
6212
6213 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6214 scsi_host_put(host);
6215 continue;
6216 }
6217 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6218 if (rc != 0)
6219 scsi_host_put(host);
6220
6221 mutex_unlock(&qla_tgt_mutex);
6222 return rc;
6223 }
6224 mutex_unlock(&qla_tgt_mutex);
6225
6226 return -ENODEV;
6227 }
6228 EXPORT_SYMBOL(qlt_lport_register);
6229
6230 /**
6231 * qla_tgt_lport_deregister - Degister lport
6232 *
6233 * @vha: Registered scsi_qla_host pointer
6234 */
6235 void qlt_lport_deregister(struct scsi_qla_host *vha)
6236 {
6237 struct qla_hw_data *ha = vha->hw;
6238 struct Scsi_Host *sh = vha->host;
6239 /*
6240 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6241 */
6242 vha->vha_tgt.target_lport_ptr = NULL;
6243 ha->tgt.tgt_ops = NULL;
6244 /*
6245 * Release the Scsi_Host reference for the underlying qla2xxx host
6246 */
6247 scsi_host_put(sh);
6248 }
6249 EXPORT_SYMBOL(qlt_lport_deregister);
6250
6251 /* Must be called under HW lock */
6252 static void qlt_set_mode(struct scsi_qla_host *vha)
6253 {
6254 struct qla_hw_data *ha = vha->hw;
6255
6256 switch (ql2x_ini_mode) {
6257 case QLA2XXX_INI_MODE_DISABLED:
6258 case QLA2XXX_INI_MODE_EXCLUSIVE:
6259 vha->host->active_mode = MODE_TARGET;
6260 break;
6261 case QLA2XXX_INI_MODE_ENABLED:
6262 vha->host->active_mode |= MODE_TARGET;
6263 break;
6264 default:
6265 break;
6266 }
6267
6268 if (ha->tgt.ini_mode_force_reverse)
6269 qla_reverse_ini_mode(vha);
6270 }
6271
6272 /* Must be called under HW lock */
6273 static void qlt_clear_mode(struct scsi_qla_host *vha)
6274 {
6275 struct qla_hw_data *ha = vha->hw;
6276
6277 switch (ql2x_ini_mode) {
6278 case QLA2XXX_INI_MODE_DISABLED:
6279 vha->host->active_mode = MODE_UNKNOWN;
6280 break;
6281 case QLA2XXX_INI_MODE_EXCLUSIVE:
6282 vha->host->active_mode = MODE_INITIATOR;
6283 break;
6284 case QLA2XXX_INI_MODE_ENABLED:
6285 vha->host->active_mode &= ~MODE_TARGET;
6286 break;
6287 default:
6288 break;
6289 }
6290
6291 if (ha->tgt.ini_mode_force_reverse)
6292 qla_reverse_ini_mode(vha);
6293 }
6294
6295 /*
6296 * qla_tgt_enable_vha - NO LOCK HELD
6297 *
6298 * host_reset, bring up w/ Target Mode Enabled
6299 */
6300 void
6301 qlt_enable_vha(struct scsi_qla_host *vha)
6302 {
6303 struct qla_hw_data *ha = vha->hw;
6304 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6305 unsigned long flags;
6306 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6307 int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6308
6309 if (!tgt) {
6310 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6311 "Unable to locate qla_tgt pointer from"
6312 " struct qla_hw_data\n");
6313 dump_stack();
6314 return;
6315 }
6316
6317 spin_lock_irqsave(&ha->hardware_lock, flags);
6318 tgt->tgt_stopped = 0;
6319 qlt_set_mode(vha);
6320 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6321
6322 if (vha->vp_idx) {
6323 qla24xx_disable_vp(vha);
6324 qla24xx_enable_vp(vha);
6325 } else {
6326 if (ha->msix_entries) {
6327 ql_dbg(ql_dbg_tgt, vha, 0xffff,
6328 "%s: host%ld : vector %d cpu %d\n",
6329 __func__, vha->host_no,
6330 ha->msix_entries[rspq_ent].vector,
6331 ha->msix_entries[rspq_ent].cpuid);
6332
6333 ha->tgt.rspq_vector_cpuid =
6334 ha->msix_entries[rspq_ent].cpuid;
6335 }
6336
6337 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6338 qla2xxx_wake_dpc(base_vha);
6339 qla2x00_wait_for_hba_online(base_vha);
6340 }
6341 }
6342 EXPORT_SYMBOL(qlt_enable_vha);
6343
6344 /*
6345 * qla_tgt_disable_vha - NO LOCK HELD
6346 *
6347 * Disable Target Mode and reset the adapter
6348 */
6349 static void qlt_disable_vha(struct scsi_qla_host *vha)
6350 {
6351 struct qla_hw_data *ha = vha->hw;
6352 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6353 unsigned long flags;
6354
6355 if (!tgt) {
6356 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6357 "Unable to locate qla_tgt pointer from"
6358 " struct qla_hw_data\n");
6359 dump_stack();
6360 return;
6361 }
6362
6363 spin_lock_irqsave(&ha->hardware_lock, flags);
6364 qlt_clear_mode(vha);
6365 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6366
6367 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6368 qla2xxx_wake_dpc(vha);
6369 qla2x00_wait_for_hba_online(vha);
6370 }
6371
6372 /*
6373 * Called from qla_init.c:qla24xx_vport_create() contex to setup
6374 * the target mode specific struct scsi_qla_host and struct qla_hw_data
6375 * members.
6376 */
6377 void
6378 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6379 {
6380 if (!qla_tgt_mode_enabled(vha))
6381 return;
6382
6383 vha->vha_tgt.qla_tgt = NULL;
6384
6385 mutex_init(&vha->vha_tgt.tgt_mutex);
6386 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6387
6388 qlt_clear_mode(vha);
6389
6390 /*
6391 * NOTE: Currently the value is kept the same for <24xx and
6392 * >=24xx ISPs. If it is necessary to change it,
6393 * the check should be added for specific ISPs,
6394 * assigning the value appropriately.
6395 */
6396 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6397
6398 qlt_add_target(ha, vha);
6399 }
6400
6401 void
6402 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6403 {
6404 /*
6405 * FC-4 Feature bit 0 indicates target functionality to the name server.
6406 */
6407 if (qla_tgt_mode_enabled(vha)) {
6408 if (qla_ini_mode_enabled(vha))
6409 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6410 else
6411 ct_req->req.rff_id.fc4_feature = BIT_0;
6412 } else if (qla_ini_mode_enabled(vha)) {
6413 ct_req->req.rff_id.fc4_feature = BIT_1;
6414 }
6415 }
6416
6417 /*
6418 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6419 * @ha: HA context
6420 *
6421 * Beginning of ATIO ring has initialization control block already built
6422 * by nvram config routine.
6423 *
6424 * Returns 0 on success.
6425 */
6426 void
6427 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6428 {
6429 struct qla_hw_data *ha = vha->hw;
6430 uint16_t cnt;
6431 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6432
6433 if (!qla_tgt_mode_enabled(vha))
6434 return;
6435
6436 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6437 pkt->u.raw.signature = ATIO_PROCESSED;
6438 pkt++;
6439 }
6440
6441 }
6442
6443 /*
6444 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6445 * @ha: SCSI driver HA context
6446 */
6447 void
6448 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6449 {
6450 struct qla_hw_data *ha = vha->hw;
6451 struct atio_from_isp *pkt;
6452 int cnt, i;
6453
6454 if (!vha->flags.online)
6455 return;
6456
6457 while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6458 fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6459 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6460 cnt = pkt->u.raw.entry_count;
6461
6462 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6463 /*
6464 * This packet is corrupted. The header + payload
6465 * can not be trusted. There is no point in passing
6466 * it further up.
6467 */
6468 ql_log(ql_log_warn, vha, 0xffff,
6469 "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6470 pkt->u.isp24.fcp_hdr.s_id,
6471 be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6472 le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6473
6474 adjust_corrupted_atio(pkt);
6475 qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
6476 } else {
6477 qlt_24xx_atio_pkt_all_vps(vha,
6478 (struct atio_from_isp *)pkt, ha_locked);
6479 }
6480
6481 for (i = 0; i < cnt; i++) {
6482 ha->tgt.atio_ring_index++;
6483 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6484 ha->tgt.atio_ring_index = 0;
6485 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6486 } else
6487 ha->tgt.atio_ring_ptr++;
6488
6489 pkt->u.raw.signature = ATIO_PROCESSED;
6490 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6491 }
6492 wmb();
6493 }
6494
6495 /* Adjust ring index */
6496 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6497 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6498 }
6499
6500 void
6501 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6502 {
6503 struct qla_hw_data *ha = vha->hw;
6504 if (!QLA_TGT_MODE_ENABLED())
6505 return;
6506
6507 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6508 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6509 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6510
6511 if (IS_ATIO_MSIX_CAPABLE(ha)) {
6512 struct qla_msix_entry *msix = &ha->msix_entries[2];
6513 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6514
6515 icb->msix_atio = cpu_to_le16(msix->entry);
6516 ql_dbg(ql_dbg_init, vha, 0xf072,
6517 "Registering ICB vector 0x%x for atio que.\n",
6518 msix->entry);
6519 }
6520 }
6521
6522 void
6523 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6524 {
6525 struct qla_hw_data *ha = vha->hw;
6526
6527 if (qla_tgt_mode_enabled(vha)) {
6528 if (!ha->tgt.saved_set) {
6529 /* We save only once */
6530 ha->tgt.saved_exchange_count = nv->exchange_count;
6531 ha->tgt.saved_firmware_options_1 =
6532 nv->firmware_options_1;
6533 ha->tgt.saved_firmware_options_2 =
6534 nv->firmware_options_2;
6535 ha->tgt.saved_firmware_options_3 =
6536 nv->firmware_options_3;
6537 ha->tgt.saved_set = 1;
6538 }
6539
6540 nv->exchange_count = cpu_to_le16(0xFFFF);
6541
6542 /* Enable target mode */
6543 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6544
6545 /* Disable ini mode, if requested */
6546 if (!qla_ini_mode_enabled(vha))
6547 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6548
6549 /* Disable Full Login after LIP */
6550 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6551 /* Enable initial LIP */
6552 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6553 if (ql2xtgt_tape_enable)
6554 /* Enable FC Tape support */
6555 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6556 else
6557 /* Disable FC Tape support */
6558 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6559
6560 /* Disable Full Login after LIP */
6561 nv->host_p &= cpu_to_le32(~BIT_10);
6562
6563 /*
6564 * clear BIT 15 explicitly as we have seen at least
6565 * a couple of instances where this was set and this
6566 * was causing the firmware to not be initialized.
6567 */
6568 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6569 /* Enable target PRLI control */
6570 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6571 } else {
6572 if (ha->tgt.saved_set) {
6573 nv->exchange_count = ha->tgt.saved_exchange_count;
6574 nv->firmware_options_1 =
6575 ha->tgt.saved_firmware_options_1;
6576 nv->firmware_options_2 =
6577 ha->tgt.saved_firmware_options_2;
6578 nv->firmware_options_3 =
6579 ha->tgt.saved_firmware_options_3;
6580 }
6581 return;
6582 }
6583
6584 if (ha->tgt.enable_class_2) {
6585 if (vha->flags.init_done)
6586 fc_host_supported_classes(vha->host) =
6587 FC_COS_CLASS2 | FC_COS_CLASS3;
6588
6589 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6590 } else {
6591 if (vha->flags.init_done)
6592 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6593
6594 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6595 }
6596 }
6597
6598 void
6599 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6600 struct init_cb_24xx *icb)
6601 {
6602 struct qla_hw_data *ha = vha->hw;
6603
6604 if (!QLA_TGT_MODE_ENABLED())
6605 return;
6606
6607 if (ha->tgt.node_name_set) {
6608 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6609 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6610 }
6611
6612 /* disable ZIO at start time. */
6613 if (!vha->flags.init_done) {
6614 uint32_t tmp;
6615 tmp = le32_to_cpu(icb->firmware_options_2);
6616 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6617 icb->firmware_options_2 = cpu_to_le32(tmp);
6618 }
6619 }
6620
6621 void
6622 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6623 {
6624 struct qla_hw_data *ha = vha->hw;
6625
6626 if (!QLA_TGT_MODE_ENABLED())
6627 return;
6628
6629 if (qla_tgt_mode_enabled(vha)) {
6630 if (!ha->tgt.saved_set) {
6631 /* We save only once */
6632 ha->tgt.saved_exchange_count = nv->exchange_count;
6633 ha->tgt.saved_firmware_options_1 =
6634 nv->firmware_options_1;
6635 ha->tgt.saved_firmware_options_2 =
6636 nv->firmware_options_2;
6637 ha->tgt.saved_firmware_options_3 =
6638 nv->firmware_options_3;
6639 ha->tgt.saved_set = 1;
6640 }
6641
6642 nv->exchange_count = cpu_to_le16(0xFFFF);
6643
6644 /* Enable target mode */
6645 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6646
6647 /* Disable ini mode, if requested */
6648 if (!qla_ini_mode_enabled(vha))
6649 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6650 /* Disable Full Login after LIP */
6651 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6652 /* Enable initial LIP */
6653 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6654 /*
6655 * clear BIT 15 explicitly as we have seen at
6656 * least a couple of instances where this was set
6657 * and this was causing the firmware to not be
6658 * initialized.
6659 */
6660 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6661 if (ql2xtgt_tape_enable)
6662 /* Enable FC tape support */
6663 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6664 else
6665 /* Disable FC tape support */
6666 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6667
6668 /* Disable Full Login after LIP */
6669 nv->host_p &= cpu_to_le32(~BIT_10);
6670 /* Enable target PRLI control */
6671 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6672 } else {
6673 if (ha->tgt.saved_set) {
6674 nv->exchange_count = ha->tgt.saved_exchange_count;
6675 nv->firmware_options_1 =
6676 ha->tgt.saved_firmware_options_1;
6677 nv->firmware_options_2 =
6678 ha->tgt.saved_firmware_options_2;
6679 nv->firmware_options_3 =
6680 ha->tgt.saved_firmware_options_3;
6681 }
6682 return;
6683 }
6684
6685 if (ha->tgt.enable_class_2) {
6686 if (vha->flags.init_done)
6687 fc_host_supported_classes(vha->host) =
6688 FC_COS_CLASS2 | FC_COS_CLASS3;
6689
6690 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6691 } else {
6692 if (vha->flags.init_done)
6693 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6694
6695 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6696 }
6697 }
6698
6699 void
6700 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6701 struct init_cb_81xx *icb)
6702 {
6703 struct qla_hw_data *ha = vha->hw;
6704
6705 if (!QLA_TGT_MODE_ENABLED())
6706 return;
6707
6708 if (ha->tgt.node_name_set) {
6709 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6710 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6711 }
6712
6713 /* disable ZIO at start time. */
6714 if (!vha->flags.init_done) {
6715 uint32_t tmp;
6716 tmp = le32_to_cpu(icb->firmware_options_2);
6717 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6718 icb->firmware_options_2 = cpu_to_le32(tmp);
6719 }
6720
6721 }
6722
6723 void
6724 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6725 {
6726 if (!QLA_TGT_MODE_ENABLED())
6727 return;
6728
6729 ha->msix_count += 1; /* For ATIO Q */
6730 }
6731
6732 int
6733 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6734 struct sts_entry_24xx *pkt)
6735 {
6736 switch (pkt->entry_type) {
6737 case ABTS_RECV_24XX:
6738 case ABTS_RESP_24XX:
6739 case CTIO_TYPE7:
6740 case NOTIFY_ACK_TYPE:
6741 case CTIO_CRC2:
6742 return 1;
6743 default:
6744 return 0;
6745 }
6746 }
6747
6748 void
6749 qlt_modify_vp_config(struct scsi_qla_host *vha,
6750 struct vp_config_entry_24xx *vpmod)
6751 {
6752 if (qla_tgt_mode_enabled(vha))
6753 vpmod->options_idx1 &= ~BIT_5;
6754 /* Disable ini mode, if requested */
6755 if (!qla_ini_mode_enabled(vha))
6756 vpmod->options_idx1 &= ~BIT_4;
6757 }
6758
6759 void
6760 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6761 {
6762 if (!QLA_TGT_MODE_ENABLED())
6763 return;
6764
6765 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6766 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6767 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6768 } else {
6769 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6770 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6771 }
6772
6773 mutex_init(&base_vha->vha_tgt.tgt_mutex);
6774 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6775 qlt_clear_mode(base_vha);
6776 }
6777
6778 irqreturn_t
6779 qla83xx_msix_atio_q(int irq, void *dev_id)
6780 {
6781 struct rsp_que *rsp;
6782 scsi_qla_host_t *vha;
6783 struct qla_hw_data *ha;
6784 unsigned long flags;
6785
6786 rsp = (struct rsp_que *) dev_id;
6787 ha = rsp->hw;
6788 vha = pci_get_drvdata(ha->pdev);
6789
6790 spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6791
6792 qlt_24xx_process_atio_queue(vha, 0);
6793
6794 spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6795
6796 return IRQ_HANDLED;
6797 }
6798
6799 static void
6800 qlt_handle_abts_recv_work(struct work_struct *work)
6801 {
6802 struct qla_tgt_sess_op *op = container_of(work,
6803 struct qla_tgt_sess_op, work);
6804 scsi_qla_host_t *vha = op->vha;
6805 struct qla_hw_data *ha = vha->hw;
6806 unsigned long flags;
6807
6808 if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6809 return;
6810
6811 spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6812 qlt_24xx_process_atio_queue(vha, 0);
6813 spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6814
6815 spin_lock_irqsave(&ha->hardware_lock, flags);
6816 qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6817 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6818 }
6819
6820 void
6821 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6822 {
6823 struct qla_tgt_sess_op *op;
6824
6825 op = kzalloc(sizeof(*op), GFP_ATOMIC);
6826
6827 if (!op) {
6828 /* do not reach for ATIO queue here. This is best effort err
6829 * recovery at this point.
6830 */
6831 qlt_response_pkt_all_vps(vha, pkt);
6832 return;
6833 }
6834
6835 memcpy(&op->atio, pkt, sizeof(*pkt));
6836 op->vha = vha;
6837 op->chip_reset = vha->hw->chip_reset;
6838 INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6839 queue_work(qla_tgt_wq, &op->work);
6840 return;
6841 }
6842
6843 int
6844 qlt_mem_alloc(struct qla_hw_data *ha)
6845 {
6846 if (!QLA_TGT_MODE_ENABLED())
6847 return 0;
6848
6849 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6850 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6851 if (!ha->tgt.tgt_vp_map)
6852 return -ENOMEM;
6853
6854 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6855 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6856 &ha->tgt.atio_dma, GFP_KERNEL);
6857 if (!ha->tgt.atio_ring) {
6858 kfree(ha->tgt.tgt_vp_map);
6859 return -ENOMEM;
6860 }
6861 return 0;
6862 }
6863
6864 void
6865 qlt_mem_free(struct qla_hw_data *ha)
6866 {
6867 if (!QLA_TGT_MODE_ENABLED())
6868 return;
6869
6870 if (ha->tgt.atio_ring) {
6871 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6872 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6873 ha->tgt.atio_dma);
6874 }
6875 kfree(ha->tgt.tgt_vp_map);
6876 }
6877
6878 /* vport_slock to be held by the caller */
6879 void
6880 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6881 {
6882 if (!QLA_TGT_MODE_ENABLED())
6883 return;
6884
6885 switch (cmd) {
6886 case SET_VP_IDX:
6887 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6888 break;
6889 case SET_AL_PA:
6890 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6891 break;
6892 case RESET_VP_IDX:
6893 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6894 break;
6895 case RESET_AL_PA:
6896 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6897 break;
6898 }
6899 }
6900
6901 static int __init qlt_parse_ini_mode(void)
6902 {
6903 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6904 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6905 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6906 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6907 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6908 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6909 else
6910 return false;
6911
6912 return true;
6913 }
6914
6915 int __init qlt_init(void)
6916 {
6917 int ret;
6918
6919 if (!qlt_parse_ini_mode()) {
6920 ql_log(ql_log_fatal, NULL, 0xe06b,
6921 "qlt_parse_ini_mode() failed\n");
6922 return -EINVAL;
6923 }
6924
6925 if (!QLA_TGT_MODE_ENABLED())
6926 return 0;
6927
6928 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6929 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6930 qla_tgt_mgmt_cmd), 0, NULL);
6931 if (!qla_tgt_mgmt_cmd_cachep) {
6932 ql_log(ql_log_fatal, NULL, 0xe06d,
6933 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6934 return -ENOMEM;
6935 }
6936
6937 qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6938 sizeof(qlt_plogi_ack_t),
6939 __alignof__(qlt_plogi_ack_t),
6940 0, NULL);
6941
6942 if (!qla_tgt_plogi_cachep) {
6943 ql_log(ql_log_fatal, NULL, 0xe06d,
6944 "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6945 ret = -ENOMEM;
6946 goto out_mgmt_cmd_cachep;
6947 }
6948
6949 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6950 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6951 if (!qla_tgt_mgmt_cmd_mempool) {
6952 ql_log(ql_log_fatal, NULL, 0xe06e,
6953 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6954 ret = -ENOMEM;
6955 goto out_plogi_cachep;
6956 }
6957
6958 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6959 if (!qla_tgt_wq) {
6960 ql_log(ql_log_fatal, NULL, 0xe06f,
6961 "alloc_workqueue for qla_tgt_wq failed\n");
6962 ret = -ENOMEM;
6963 goto out_cmd_mempool;
6964 }
6965 /*
6966 * Return 1 to signal that initiator-mode is being disabled
6967 */
6968 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6969
6970 out_cmd_mempool:
6971 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6972 out_plogi_cachep:
6973 kmem_cache_destroy(qla_tgt_plogi_cachep);
6974 out_mgmt_cmd_cachep:
6975 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6976 return ret;
6977 }
6978
6979 void qlt_exit(void)
6980 {
6981 if (!QLA_TGT_MODE_ENABLED())
6982 return;
6983
6984 destroy_workqueue(qla_tgt_wq);
6985 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6986 kmem_cache_destroy(qla_tgt_plogi_cachep);
6987 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6988 }
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