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Merge branch 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[mirror_ubuntu-bionic-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);
104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
106 int fn, void *iocb, int flags);
107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
108 *cmd, struct atio_from_isp *atio, int ha_locked);
109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
110 struct qla_tgt_srr_imm *imm, int ha_lock);
111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
112 struct qla_tgt_cmd *cmd);
113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
114 struct atio_from_isp *atio, uint16_t status, int qfull);
115 static void qlt_disable_vha(struct scsi_qla_host *vha);
116 /*
117 * Global Variables
118 */
119 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
120 static mempool_t *qla_tgt_mgmt_cmd_mempool;
121 static struct workqueue_struct *qla_tgt_wq;
122 static DEFINE_MUTEX(qla_tgt_mutex);
123 static LIST_HEAD(qla_tgt_glist);
124
125 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
126 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
127 struct qla_tgt *tgt,
128 const uint8_t *port_name)
129 {
130 struct qla_tgt_sess *sess;
131
132 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
133 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
134 return sess;
135 }
136
137 return NULL;
138 }
139
140 /* Might release hw lock, then reaquire!! */
141 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
142 {
143 /* Send marker if required */
144 if (unlikely(vha->marker_needed != 0)) {
145 int rc = qla2x00_issue_marker(vha, vha_locked);
146 if (rc != QLA_SUCCESS) {
147 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
148 "qla_target(%d): issue_marker() failed\n",
149 vha->vp_idx);
150 }
151 return rc;
152 }
153 return QLA_SUCCESS;
154 }
155
156 static inline
157 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
158 uint8_t *d_id)
159 {
160 struct qla_hw_data *ha = vha->hw;
161 uint8_t vp_idx;
162
163 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
164 return NULL;
165
166 if (vha->d_id.b.al_pa == d_id[2])
167 return vha;
168
169 BUG_ON(ha->tgt.tgt_vp_map == NULL);
170 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
171 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
172 return ha->tgt.tgt_vp_map[vp_idx].vha;
173
174 return NULL;
175 }
176
177 static inline
178 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
179 uint16_t vp_idx)
180 {
181 struct qla_hw_data *ha = vha->hw;
182
183 if (vha->vp_idx == vp_idx)
184 return vha;
185
186 BUG_ON(ha->tgt.tgt_vp_map == NULL);
187 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
188 return ha->tgt.tgt_vp_map[vp_idx].vha;
189
190 return NULL;
191 }
192
193 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
194 {
195 unsigned long flags;
196
197 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
198
199 vha->hw->tgt.num_pend_cmds++;
200 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
201 vha->hw->qla_stats.stat_max_pend_cmds =
202 vha->hw->tgt.num_pend_cmds;
203 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
204 }
205 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
206 {
207 unsigned long flags;
208
209 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
210 vha->hw->tgt.num_pend_cmds--;
211 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
212 }
213
214 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
215 struct atio_from_isp *atio)
216 {
217 ql_dbg(ql_dbg_tgt, vha, 0xe072,
218 "%s: qla_target(%d): type %x ox_id %04x\n",
219 __func__, vha->vp_idx, atio->u.raw.entry_type,
220 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
221
222 switch (atio->u.raw.entry_type) {
223 case ATIO_TYPE7:
224 {
225 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
226 atio->u.isp24.fcp_hdr.d_id);
227 if (unlikely(NULL == host)) {
228 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
229 "qla_target(%d): Received ATIO_TYPE7 "
230 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
231 atio->u.isp24.fcp_hdr.d_id[0],
232 atio->u.isp24.fcp_hdr.d_id[1],
233 atio->u.isp24.fcp_hdr.d_id[2]);
234 break;
235 }
236 qlt_24xx_atio_pkt(host, atio);
237 break;
238 }
239
240 case IMMED_NOTIFY_TYPE:
241 {
242 struct scsi_qla_host *host = vha;
243 struct imm_ntfy_from_isp *entry =
244 (struct imm_ntfy_from_isp *)atio;
245
246 if ((entry->u.isp24.vp_index != 0xFF) &&
247 (entry->u.isp24.nport_handle != 0xFFFF)) {
248 host = qlt_find_host_by_vp_idx(vha,
249 entry->u.isp24.vp_index);
250 if (unlikely(!host)) {
251 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
252 "qla_target(%d): Received "
253 "ATIO (IMMED_NOTIFY_TYPE) "
254 "with unknown vp_index %d\n",
255 vha->vp_idx, entry->u.isp24.vp_index);
256 break;
257 }
258 }
259 qlt_24xx_atio_pkt(host, atio);
260 break;
261 }
262
263 default:
264 ql_dbg(ql_dbg_tgt, vha, 0xe040,
265 "qla_target(%d): Received unknown ATIO atio "
266 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
267 break;
268 }
269
270 return;
271 }
272
273 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
274 {
275 switch (pkt->entry_type) {
276 case CTIO_CRC2:
277 ql_dbg(ql_dbg_tgt, vha, 0xe073,
278 "qla_target(%d):%s: CRC2 Response pkt\n",
279 vha->vp_idx, __func__);
280 case CTIO_TYPE7:
281 {
282 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
283 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
284 entry->vp_index);
285 if (unlikely(!host)) {
286 ql_dbg(ql_dbg_tgt, vha, 0xe041,
287 "qla_target(%d): Response pkt (CTIO_TYPE7) "
288 "received, with unknown vp_index %d\n",
289 vha->vp_idx, entry->vp_index);
290 break;
291 }
292 qlt_response_pkt(host, pkt);
293 break;
294 }
295
296 case IMMED_NOTIFY_TYPE:
297 {
298 struct scsi_qla_host *host = vha;
299 struct imm_ntfy_from_isp *entry =
300 (struct imm_ntfy_from_isp *)pkt;
301
302 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
303 if (unlikely(!host)) {
304 ql_dbg(ql_dbg_tgt, vha, 0xe042,
305 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
306 "received, with unknown vp_index %d\n",
307 vha->vp_idx, entry->u.isp24.vp_index);
308 break;
309 }
310 qlt_response_pkt(host, pkt);
311 break;
312 }
313
314 case NOTIFY_ACK_TYPE:
315 {
316 struct scsi_qla_host *host = vha;
317 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
318
319 if (0xFF != entry->u.isp24.vp_index) {
320 host = qlt_find_host_by_vp_idx(vha,
321 entry->u.isp24.vp_index);
322 if (unlikely(!host)) {
323 ql_dbg(ql_dbg_tgt, vha, 0xe043,
324 "qla_target(%d): Response "
325 "pkt (NOTIFY_ACK_TYPE) "
326 "received, with unknown "
327 "vp_index %d\n", vha->vp_idx,
328 entry->u.isp24.vp_index);
329 break;
330 }
331 }
332 qlt_response_pkt(host, pkt);
333 break;
334 }
335
336 case ABTS_RECV_24XX:
337 {
338 struct abts_recv_from_24xx *entry =
339 (struct abts_recv_from_24xx *)pkt;
340 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
341 entry->vp_index);
342 if (unlikely(!host)) {
343 ql_dbg(ql_dbg_tgt, vha, 0xe044,
344 "qla_target(%d): Response pkt "
345 "(ABTS_RECV_24XX) received, with unknown "
346 "vp_index %d\n", vha->vp_idx, entry->vp_index);
347 break;
348 }
349 qlt_response_pkt(host, pkt);
350 break;
351 }
352
353 case ABTS_RESP_24XX:
354 {
355 struct abts_resp_to_24xx *entry =
356 (struct abts_resp_to_24xx *)pkt;
357 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
358 entry->vp_index);
359 if (unlikely(!host)) {
360 ql_dbg(ql_dbg_tgt, vha, 0xe045,
361 "qla_target(%d): Response pkt "
362 "(ABTS_RECV_24XX) received, with unknown "
363 "vp_index %d\n", vha->vp_idx, entry->vp_index);
364 break;
365 }
366 qlt_response_pkt(host, pkt);
367 break;
368 }
369
370 default:
371 qlt_response_pkt(vha, pkt);
372 break;
373 }
374
375 }
376
377 static void qlt_free_session_done(struct work_struct *work)
378 {
379 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
380 free_work);
381 struct qla_tgt *tgt = sess->tgt;
382 struct scsi_qla_host *vha = sess->vha;
383 struct qla_hw_data *ha = vha->hw;
384
385 BUG_ON(!tgt);
386 /*
387 * Release the target session for FC Nexus from fabric module code.
388 */
389 if (sess->se_sess != NULL)
390 ha->tgt.tgt_ops->free_session(sess);
391
392 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
393 "Unregistration of sess %p finished\n", sess);
394
395 kfree(sess);
396 /*
397 * We need to protect against race, when tgt is freed before or
398 * inside wake_up()
399 */
400 tgt->sess_count--;
401 if (tgt->sess_count == 0)
402 wake_up_all(&tgt->waitQ);
403 }
404
405 /* ha->hardware_lock supposed to be held on entry */
406 void qlt_unreg_sess(struct qla_tgt_sess *sess)
407 {
408 struct scsi_qla_host *vha = sess->vha;
409
410 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
411
412 list_del(&sess->sess_list_entry);
413 if (sess->deleted)
414 list_del(&sess->del_list_entry);
415
416 INIT_WORK(&sess->free_work, qlt_free_session_done);
417 schedule_work(&sess->free_work);
418 }
419 EXPORT_SYMBOL(qlt_unreg_sess);
420
421 /* ha->hardware_lock supposed to be held on entry */
422 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
423 {
424 struct qla_hw_data *ha = vha->hw;
425 struct qla_tgt_sess *sess = NULL;
426 uint32_t unpacked_lun, lun = 0;
427 uint16_t loop_id;
428 int res = 0;
429 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
430 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
431
432 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
433 if (loop_id == 0xFFFF) {
434 #if 0 /* FIXME: Re-enable Global event handling.. */
435 /* Global event */
436 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
437 qlt_clear_tgt_db(ha->tgt.qla_tgt);
438 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
439 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
440 typeof(*sess), sess_list_entry);
441 switch (mcmd) {
442 case QLA_TGT_NEXUS_LOSS_SESS:
443 mcmd = QLA_TGT_NEXUS_LOSS;
444 break;
445 case QLA_TGT_ABORT_ALL_SESS:
446 mcmd = QLA_TGT_ABORT_ALL;
447 break;
448 case QLA_TGT_NEXUS_LOSS:
449 case QLA_TGT_ABORT_ALL:
450 break;
451 default:
452 ql_dbg(ql_dbg_tgt, vha, 0xe046,
453 "qla_target(%d): Not allowed "
454 "command %x in %s", vha->vp_idx,
455 mcmd, __func__);
456 sess = NULL;
457 break;
458 }
459 } else
460 sess = NULL;
461 #endif
462 } else {
463 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
464 }
465
466 ql_dbg(ql_dbg_tgt, vha, 0xe000,
467 "Using sess for qla_tgt_reset: %p\n", sess);
468 if (!sess) {
469 res = -ESRCH;
470 return res;
471 }
472
473 ql_dbg(ql_dbg_tgt, vha, 0xe047,
474 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
475 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
476 mcmd, loop_id);
477
478 lun = a->u.isp24.fcp_cmnd.lun;
479 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
480
481 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
482 iocb, QLA24XX_MGMT_SEND_NACK);
483 }
484
485 /* ha->hardware_lock supposed to be held on entry */
486 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
487 bool immediate)
488 {
489 struct qla_tgt *tgt = sess->tgt;
490 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
491
492 if (sess->deleted)
493 return;
494
495 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
496 "Scheduling sess %p for deletion\n", sess);
497 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
498 sess->deleted = 1;
499
500 if (immediate)
501 dev_loss_tmo = 0;
502
503 sess->expires = jiffies + dev_loss_tmo * HZ;
504
505 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
506 "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
507 "deletion in %u secs (expires: %lu) immed: %d\n",
508 sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
509 sess->expires, immediate);
510
511 if (immediate)
512 schedule_delayed_work(&tgt->sess_del_work, 0);
513 else
514 schedule_delayed_work(&tgt->sess_del_work,
515 sess->expires - jiffies);
516 }
517
518 /* ha->hardware_lock supposed to be held on entry */
519 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
520 {
521 struct qla_tgt_sess *sess;
522
523 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
524 qlt_schedule_sess_for_deletion(sess, true);
525
526 /* At this point tgt could be already dead */
527 }
528
529 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
530 uint16_t *loop_id)
531 {
532 struct qla_hw_data *ha = vha->hw;
533 dma_addr_t gid_list_dma;
534 struct gid_list_info *gid_list;
535 char *id_iter;
536 int res, rc, i;
537 uint16_t entries;
538
539 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
540 &gid_list_dma, GFP_KERNEL);
541 if (!gid_list) {
542 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
543 "qla_target(%d): DMA Alloc failed of %u\n",
544 vha->vp_idx, qla2x00_gid_list_size(ha));
545 return -ENOMEM;
546 }
547
548 /* Get list of logged in devices */
549 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
550 if (rc != QLA_SUCCESS) {
551 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
552 "qla_target(%d): get_id_list() failed: %x\n",
553 vha->vp_idx, rc);
554 res = -1;
555 goto out_free_id_list;
556 }
557
558 id_iter = (char *)gid_list;
559 res = -1;
560 for (i = 0; i < entries; i++) {
561 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
562 if ((gid->al_pa == s_id[2]) &&
563 (gid->area == s_id[1]) &&
564 (gid->domain == s_id[0])) {
565 *loop_id = le16_to_cpu(gid->loop_id);
566 res = 0;
567 break;
568 }
569 id_iter += ha->gid_list_info_size;
570 }
571
572 out_free_id_list:
573 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
574 gid_list, gid_list_dma);
575 return res;
576 }
577
578 /* ha->hardware_lock supposed to be held on entry */
579 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
580 {
581 BUG_ON(!sess->deleted);
582
583 list_del(&sess->del_list_entry);
584 sess->deleted = 0;
585 }
586
587 static void qlt_del_sess_work_fn(struct delayed_work *work)
588 {
589 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
590 sess_del_work);
591 struct scsi_qla_host *vha = tgt->vha;
592 struct qla_hw_data *ha = vha->hw;
593 struct qla_tgt_sess *sess;
594 unsigned long flags, elapsed;
595
596 spin_lock_irqsave(&ha->hardware_lock, flags);
597 while (!list_empty(&tgt->del_sess_list)) {
598 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
599 del_list_entry);
600 elapsed = jiffies;
601 if (time_after_eq(elapsed, sess->expires)) {
602 qlt_undelete_sess(sess);
603
604 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
605 "Timeout: sess %p about to be deleted\n",
606 sess);
607 ha->tgt.tgt_ops->shutdown_sess(sess);
608 ha->tgt.tgt_ops->put_sess(sess);
609 } else {
610 schedule_delayed_work(&tgt->sess_del_work,
611 sess->expires - elapsed);
612 break;
613 }
614 }
615 spin_unlock_irqrestore(&ha->hardware_lock, flags);
616 }
617
618 /*
619 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
620 * Caller must put it.
621 */
622 static struct qla_tgt_sess *qlt_create_sess(
623 struct scsi_qla_host *vha,
624 fc_port_t *fcport,
625 bool local)
626 {
627 struct qla_hw_data *ha = vha->hw;
628 struct qla_tgt_sess *sess;
629 unsigned long flags;
630 unsigned char be_sid[3];
631
632 /* Check to avoid double sessions */
633 spin_lock_irqsave(&ha->hardware_lock, flags);
634 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
635 sess_list_entry) {
636 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
637 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
638 "Double sess %p found (s_id %x:%x:%x, "
639 "loop_id %d), updating to d_id %x:%x:%x, "
640 "loop_id %d", sess, sess->s_id.b.domain,
641 sess->s_id.b.al_pa, sess->s_id.b.area,
642 sess->loop_id, fcport->d_id.b.domain,
643 fcport->d_id.b.al_pa, fcport->d_id.b.area,
644 fcport->loop_id);
645
646 if (sess->deleted)
647 qlt_undelete_sess(sess);
648
649 kref_get(&sess->se_sess->sess_kref);
650 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
651 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
652
653 if (sess->local && !local)
654 sess->local = 0;
655 spin_unlock_irqrestore(&ha->hardware_lock, flags);
656
657 return sess;
658 }
659 }
660 spin_unlock_irqrestore(&ha->hardware_lock, flags);
661
662 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
663 if (!sess) {
664 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
665 "qla_target(%u): session allocation failed, all commands "
666 "from port %8phC will be refused", vha->vp_idx,
667 fcport->port_name);
668
669 return NULL;
670 }
671 sess->tgt = vha->vha_tgt.qla_tgt;
672 sess->vha = vha;
673 sess->s_id = fcport->d_id;
674 sess->loop_id = fcport->loop_id;
675 sess->local = local;
676
677 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
678 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
679 sess, vha->vha_tgt.qla_tgt);
680
681 be_sid[0] = sess->s_id.b.domain;
682 be_sid[1] = sess->s_id.b.area;
683 be_sid[2] = sess->s_id.b.al_pa;
684 /*
685 * Determine if this fc_port->port_name is allowed to access
686 * target mode using explict NodeACLs+MappedLUNs, or using
687 * TPG demo mode. If this is successful a target mode FC nexus
688 * is created.
689 */
690 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
691 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
692 kfree(sess);
693 return NULL;
694 }
695 /*
696 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
697 * access across ->hardware_lock reaquire.
698 */
699 kref_get(&sess->se_sess->sess_kref);
700
701 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
702 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
703 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
704
705 spin_lock_irqsave(&ha->hardware_lock, flags);
706 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
707 vha->vha_tgt.qla_tgt->sess_count++;
708 spin_unlock_irqrestore(&ha->hardware_lock, flags);
709
710 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
711 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
712 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
713 vha->vp_idx, local ? "local " : "", fcport->port_name,
714 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
715 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
716
717 return sess;
718 }
719
720 /*
721 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
722 */
723 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
724 {
725 struct qla_hw_data *ha = vha->hw;
726 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
727 struct qla_tgt_sess *sess;
728 unsigned long flags;
729
730 if (!vha->hw->tgt.tgt_ops)
731 return;
732
733 if (!tgt || (fcport->port_type != FCT_INITIATOR))
734 return;
735
736 if (qla_ini_mode_enabled(vha))
737 return;
738
739 spin_lock_irqsave(&ha->hardware_lock, flags);
740 if (tgt->tgt_stop) {
741 spin_unlock_irqrestore(&ha->hardware_lock, flags);
742 return;
743 }
744 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
745 if (!sess) {
746 spin_unlock_irqrestore(&ha->hardware_lock, flags);
747
748 mutex_lock(&vha->vha_tgt.tgt_mutex);
749 sess = qlt_create_sess(vha, fcport, false);
750 mutex_unlock(&vha->vha_tgt.tgt_mutex);
751
752 spin_lock_irqsave(&ha->hardware_lock, flags);
753 } else {
754 kref_get(&sess->se_sess->sess_kref);
755
756 if (sess->deleted) {
757 qlt_undelete_sess(sess);
758
759 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
760 "qla_target(%u): %ssession for port %8phC "
761 "(loop ID %d) reappeared\n", vha->vp_idx,
762 sess->local ? "local " : "", sess->port_name,
763 sess->loop_id);
764
765 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
766 "Reappeared sess %p\n", sess);
767 }
768 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
769 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
770 }
771
772 if (sess && sess->local) {
773 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
774 "qla_target(%u): local session for "
775 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
776 fcport->port_name, sess->loop_id);
777 sess->local = 0;
778 }
779 ha->tgt.tgt_ops->put_sess(sess);
780 spin_unlock_irqrestore(&ha->hardware_lock, flags);
781 }
782
783 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
784 {
785 struct qla_hw_data *ha = vha->hw;
786 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
787 struct qla_tgt_sess *sess;
788 unsigned long flags;
789
790 if (!vha->hw->tgt.tgt_ops)
791 return;
792
793 if (!tgt || (fcport->port_type != FCT_INITIATOR))
794 return;
795
796 spin_lock_irqsave(&ha->hardware_lock, flags);
797 if (tgt->tgt_stop) {
798 spin_unlock_irqrestore(&ha->hardware_lock, flags);
799 return;
800 }
801 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
802 if (!sess) {
803 spin_unlock_irqrestore(&ha->hardware_lock, flags);
804 return;
805 }
806
807 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
808
809 sess->local = 1;
810 qlt_schedule_sess_for_deletion(sess, false);
811 spin_unlock_irqrestore(&ha->hardware_lock, flags);
812 }
813
814 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
815 {
816 struct qla_hw_data *ha = tgt->ha;
817 unsigned long flags;
818 int res;
819 /*
820 * We need to protect against race, when tgt is freed before or
821 * inside wake_up()
822 */
823 spin_lock_irqsave(&ha->hardware_lock, flags);
824 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
825 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
826 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
827 res = (tgt->sess_count == 0);
828 spin_unlock_irqrestore(&ha->hardware_lock, flags);
829
830 return res;
831 }
832
833 /* Called by tcm_qla2xxx configfs code */
834 int qlt_stop_phase1(struct qla_tgt *tgt)
835 {
836 struct scsi_qla_host *vha = tgt->vha;
837 struct qla_hw_data *ha = tgt->ha;
838 unsigned long flags;
839
840 mutex_lock(&qla_tgt_mutex);
841 if (!vha->fc_vport) {
842 struct Scsi_Host *sh = vha->host;
843 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
844 bool npiv_vports;
845
846 spin_lock_irqsave(sh->host_lock, flags);
847 npiv_vports = (fc_host->npiv_vports_inuse);
848 spin_unlock_irqrestore(sh->host_lock, flags);
849
850 if (npiv_vports) {
851 mutex_unlock(&qla_tgt_mutex);
852 return -EPERM;
853 }
854 }
855 if (tgt->tgt_stop || tgt->tgt_stopped) {
856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
857 "Already in tgt->tgt_stop or tgt_stopped state\n");
858 mutex_unlock(&qla_tgt_mutex);
859 return -EPERM;
860 }
861
862 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
863 vha->host_no, vha);
864 /*
865 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
866 * Lock is needed, because we still can get an incoming packet.
867 */
868 mutex_lock(&vha->vha_tgt.tgt_mutex);
869 spin_lock_irqsave(&ha->hardware_lock, flags);
870 tgt->tgt_stop = 1;
871 qlt_clear_tgt_db(tgt);
872 spin_unlock_irqrestore(&ha->hardware_lock, flags);
873 mutex_unlock(&vha->vha_tgt.tgt_mutex);
874 mutex_unlock(&qla_tgt_mutex);
875
876 flush_delayed_work(&tgt->sess_del_work);
877
878 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
879 "Waiting for sess works (tgt %p)", tgt);
880 spin_lock_irqsave(&tgt->sess_work_lock, flags);
881 while (!list_empty(&tgt->sess_works_list)) {
882 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
883 flush_scheduled_work();
884 spin_lock_irqsave(&tgt->sess_work_lock, flags);
885 }
886 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
887
888 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
889 "Waiting for tgt %p: list_empty(sess_list)=%d "
890 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
891 tgt->sess_count);
892
893 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
894
895 /* Big hammer */
896 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
897 qlt_disable_vha(vha);
898
899 /* Wait for sessions to clear out (just in case) */
900 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
901 return 0;
902 }
903 EXPORT_SYMBOL(qlt_stop_phase1);
904
905 /* Called by tcm_qla2xxx configfs code */
906 void qlt_stop_phase2(struct qla_tgt *tgt)
907 {
908 struct qla_hw_data *ha = tgt->ha;
909 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
910 unsigned long flags;
911
912 if (tgt->tgt_stopped) {
913 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
914 "Already in tgt->tgt_stopped state\n");
915 dump_stack();
916 return;
917 }
918
919 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
920 "Waiting for %d IRQ commands to complete (tgt %p)",
921 tgt->irq_cmd_count, tgt);
922
923 mutex_lock(&vha->vha_tgt.tgt_mutex);
924 spin_lock_irqsave(&ha->hardware_lock, flags);
925 while (tgt->irq_cmd_count != 0) {
926 spin_unlock_irqrestore(&ha->hardware_lock, flags);
927 udelay(2);
928 spin_lock_irqsave(&ha->hardware_lock, flags);
929 }
930 tgt->tgt_stop = 0;
931 tgt->tgt_stopped = 1;
932 spin_unlock_irqrestore(&ha->hardware_lock, flags);
933 mutex_unlock(&vha->vha_tgt.tgt_mutex);
934
935 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
936 tgt);
937 }
938 EXPORT_SYMBOL(qlt_stop_phase2);
939
940 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
941 static void qlt_release(struct qla_tgt *tgt)
942 {
943 scsi_qla_host_t *vha = tgt->vha;
944
945 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
946 qlt_stop_phase2(tgt);
947
948 vha->vha_tgt.qla_tgt = NULL;
949
950 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
951 "Release of tgt %p finished\n", tgt);
952
953 kfree(tgt);
954 }
955
956 /* ha->hardware_lock supposed to be held on entry */
957 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
958 const void *param, unsigned int param_size)
959 {
960 struct qla_tgt_sess_work_param *prm;
961 unsigned long flags;
962
963 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
964 if (!prm) {
965 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
966 "qla_target(%d): Unable to create session "
967 "work, command will be refused", 0);
968 return -ENOMEM;
969 }
970
971 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
972 "Scheduling work (type %d, prm %p)"
973 " to find session for param %p (size %d, tgt %p)\n",
974 type, prm, param, param_size, tgt);
975
976 prm->type = type;
977 memcpy(&prm->tm_iocb, param, param_size);
978
979 spin_lock_irqsave(&tgt->sess_work_lock, flags);
980 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
981 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
982
983 schedule_work(&tgt->sess_work);
984
985 return 0;
986 }
987
988 /*
989 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
990 */
991 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
992 struct imm_ntfy_from_isp *ntfy,
993 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
994 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
995 {
996 struct qla_hw_data *ha = vha->hw;
997 request_t *pkt;
998 struct nack_to_isp *nack;
999
1000 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1001
1002 /* Send marker if required */
1003 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1004 return;
1005
1006 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1007 if (!pkt) {
1008 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1009 "qla_target(%d): %s failed: unable to allocate "
1010 "request packet\n", vha->vp_idx, __func__);
1011 return;
1012 }
1013
1014 if (vha->vha_tgt.qla_tgt != NULL)
1015 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1016
1017 pkt->entry_type = NOTIFY_ACK_TYPE;
1018 pkt->entry_count = 1;
1019
1020 nack = (struct nack_to_isp *)pkt;
1021 nack->ox_id = ntfy->ox_id;
1022
1023 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1024 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1025 nack->u.isp24.flags = ntfy->u.isp24.flags &
1026 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1027 }
1028 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1029 nack->u.isp24.status = ntfy->u.isp24.status;
1030 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1031 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1032 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1033 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1034 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1035 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1036 nack->u.isp24.srr_reject_code = srr_reject_code;
1037 nack->u.isp24.srr_reject_code_expl = srr_explan;
1038 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1039
1040 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1041 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1042 vha->vp_idx, nack->u.isp24.status);
1043
1044 /* Memory Barrier */
1045 wmb();
1046 qla2x00_start_iocbs(vha, vha->req);
1047 }
1048
1049 /*
1050 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1051 */
1052 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1053 struct abts_recv_from_24xx *abts, uint32_t status,
1054 bool ids_reversed)
1055 {
1056 struct qla_hw_data *ha = vha->hw;
1057 struct abts_resp_to_24xx *resp;
1058 uint32_t f_ctl;
1059 uint8_t *p;
1060
1061 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1062 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1063 ha, abts, status);
1064
1065 /* Send marker if required */
1066 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1067 return;
1068
1069 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1070 if (!resp) {
1071 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1072 "qla_target(%d): %s failed: unable to allocate "
1073 "request packet", vha->vp_idx, __func__);
1074 return;
1075 }
1076
1077 resp->entry_type = ABTS_RESP_24XX;
1078 resp->entry_count = 1;
1079 resp->nport_handle = abts->nport_handle;
1080 resp->vp_index = vha->vp_idx;
1081 resp->sof_type = abts->sof_type;
1082 resp->exchange_address = abts->exchange_address;
1083 resp->fcp_hdr_le = abts->fcp_hdr_le;
1084 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1085 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1086 F_CTL_SEQ_INITIATIVE);
1087 p = (uint8_t *)&f_ctl;
1088 resp->fcp_hdr_le.f_ctl[0] = *p++;
1089 resp->fcp_hdr_le.f_ctl[1] = *p++;
1090 resp->fcp_hdr_le.f_ctl[2] = *p;
1091 if (ids_reversed) {
1092 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1093 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1094 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1095 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1096 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1097 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1098 } else {
1099 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1100 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1101 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1102 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1103 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1104 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1105 }
1106 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1107 if (status == FCP_TMF_CMPL) {
1108 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1109 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1110 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1111 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1112 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1113 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1114 } else {
1115 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1116 resp->payload.ba_rjt.reason_code =
1117 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1118 /* Other bytes are zero */
1119 }
1120
1121 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1122
1123 /* Memory Barrier */
1124 wmb();
1125 qla2x00_start_iocbs(vha, vha->req);
1126 }
1127
1128 /*
1129 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1130 */
1131 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1132 struct abts_resp_from_24xx_fw *entry)
1133 {
1134 struct ctio7_to_24xx *ctio;
1135
1136 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1137 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1138 /* Send marker if required */
1139 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1140 return;
1141
1142 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1143 if (ctio == NULL) {
1144 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1145 "qla_target(%d): %s failed: unable to allocate "
1146 "request packet\n", vha->vp_idx, __func__);
1147 return;
1148 }
1149
1150 /*
1151 * We've got on entrance firmware's response on by us generated
1152 * ABTS response. So, in it ID fields are reversed.
1153 */
1154
1155 ctio->entry_type = CTIO_TYPE7;
1156 ctio->entry_count = 1;
1157 ctio->nport_handle = entry->nport_handle;
1158 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1159 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1160 ctio->vp_index = vha->vp_idx;
1161 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1162 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1163 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1164 ctio->exchange_addr = entry->exchange_addr_to_abort;
1165 ctio->u.status1.flags =
1166 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1167 CTIO7_FLAGS_TERMINATE);
1168 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1169
1170 /* Memory Barrier */
1171 wmb();
1172 qla2x00_start_iocbs(vha, vha->req);
1173
1174 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1175 FCP_TMF_CMPL, true);
1176 }
1177
1178 /* ha->hardware_lock supposed to be held on entry */
1179 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1180 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1181 {
1182 struct qla_hw_data *ha = vha->hw;
1183 struct se_session *se_sess = sess->se_sess;
1184 struct qla_tgt_mgmt_cmd *mcmd;
1185 struct se_cmd *se_cmd;
1186 u32 lun = 0;
1187 int rc;
1188 bool found_lun = false;
1189
1190 spin_lock(&se_sess->sess_cmd_lock);
1191 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1192 struct qla_tgt_cmd *cmd =
1193 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1194 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1195 lun = cmd->unpacked_lun;
1196 found_lun = true;
1197 break;
1198 }
1199 }
1200 spin_unlock(&se_sess->sess_cmd_lock);
1201
1202 if (!found_lun)
1203 return -ENOENT;
1204
1205 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1206 "qla_target(%d): task abort (tag=%d)\n",
1207 vha->vp_idx, abts->exchange_addr_to_abort);
1208
1209 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1210 if (mcmd == NULL) {
1211 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1212 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1213 vha->vp_idx, __func__);
1214 return -ENOMEM;
1215 }
1216 memset(mcmd, 0, sizeof(*mcmd));
1217
1218 mcmd->sess = sess;
1219 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1220 mcmd->reset_count = vha->hw->chip_reset;
1221
1222 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1223 abts->exchange_addr_to_abort);
1224 if (rc != 0) {
1225 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1226 "qla_target(%d): tgt_ops->handle_tmr()"
1227 " failed: %d", vha->vp_idx, rc);
1228 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1229 return -EFAULT;
1230 }
1231
1232 return 0;
1233 }
1234
1235 /*
1236 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1237 */
1238 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1239 struct abts_recv_from_24xx *abts)
1240 {
1241 struct qla_hw_data *ha = vha->hw;
1242 struct qla_tgt_sess *sess;
1243 uint32_t tag = abts->exchange_addr_to_abort;
1244 uint8_t s_id[3];
1245 int rc;
1246
1247 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1248 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1249 "qla_target(%d): ABTS: Abort Sequence not "
1250 "supported\n", vha->vp_idx);
1251 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1252 return;
1253 }
1254
1255 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1256 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1257 "qla_target(%d): ABTS: Unknown Exchange "
1258 "Address received\n", vha->vp_idx);
1259 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1260 return;
1261 }
1262
1263 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1264 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1265 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1266 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1267 le32_to_cpu(abts->fcp_hdr_le.parameter));
1268
1269 s_id[0] = abts->fcp_hdr_le.s_id[2];
1270 s_id[1] = abts->fcp_hdr_le.s_id[1];
1271 s_id[2] = abts->fcp_hdr_le.s_id[0];
1272
1273 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1274 if (!sess) {
1275 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1276 "qla_target(%d): task abort for non-existant session\n",
1277 vha->vp_idx);
1278 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1279 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1280 if (rc != 0) {
1281 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1282 false);
1283 }
1284 return;
1285 }
1286
1287 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1288 if (rc != 0) {
1289 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1290 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1291 vha->vp_idx, rc);
1292 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1293 return;
1294 }
1295 }
1296
1297 /*
1298 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1299 */
1300 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1301 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1302 {
1303 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1304 struct ctio7_to_24xx *ctio;
1305 uint16_t temp;
1306
1307 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1308 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1309 ha, atio, resp_code);
1310
1311 /* Send marker if required */
1312 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1313 return;
1314
1315 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1316 if (ctio == NULL) {
1317 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1318 "qla_target(%d): %s failed: unable to allocate "
1319 "request packet\n", ha->vp_idx, __func__);
1320 return;
1321 }
1322
1323 ctio->entry_type = CTIO_TYPE7;
1324 ctio->entry_count = 1;
1325 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1326 ctio->nport_handle = mcmd->sess->loop_id;
1327 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1328 ctio->vp_index = ha->vp_idx;
1329 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1330 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1331 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1332 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1333 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1334 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1335 CTIO7_FLAGS_SEND_STATUS);
1336 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1337 ctio->u.status1.ox_id = cpu_to_le16(temp);
1338 ctio->u.status1.scsi_status =
1339 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1340 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1341 ctio->u.status1.sense_data[0] = resp_code;
1342
1343 /* Memory Barrier */
1344 wmb();
1345 qla2x00_start_iocbs(ha, ha->req);
1346 }
1347
1348 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1349 {
1350 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1351 }
1352 EXPORT_SYMBOL(qlt_free_mcmd);
1353
1354 /* callback from target fabric module code */
1355 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1356 {
1357 struct scsi_qla_host *vha = mcmd->sess->vha;
1358 struct qla_hw_data *ha = vha->hw;
1359 unsigned long flags;
1360
1361 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1362 "TM response mcmd (%p) status %#x state %#x",
1363 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1364
1365 spin_lock_irqsave(&ha->hardware_lock, flags);
1366
1367 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1368 /*
1369 * Either a chip reset is active or this request was from
1370 * previous life, just abort the processing.
1371 */
1372 ql_dbg(ql_dbg_async, vha, 0xe100,
1373 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1374 qla2x00_reset_active(vha), mcmd->reset_count,
1375 ha->chip_reset);
1376 ha->tgt.tgt_ops->free_mcmd(mcmd);
1377 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1378 return;
1379 }
1380
1381 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1382 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1383 0, 0, 0, 0, 0, 0);
1384 else {
1385 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1386 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1387 mcmd->fc_tm_rsp, false);
1388 else
1389 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1390 mcmd->fc_tm_rsp);
1391 }
1392 /*
1393 * Make the callback for ->free_mcmd() to queue_work() and invoke
1394 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1395 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1396 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1397 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1398 * qlt_xmit_tm_rsp() returns here..
1399 */
1400 ha->tgt.tgt_ops->free_mcmd(mcmd);
1401 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1402 }
1403 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1404
1405 /* No locks */
1406 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1407 {
1408 struct qla_tgt_cmd *cmd = prm->cmd;
1409
1410 BUG_ON(cmd->sg_cnt == 0);
1411
1412 prm->sg = (struct scatterlist *)cmd->sg;
1413 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1414 cmd->sg_cnt, cmd->dma_data_direction);
1415 if (unlikely(prm->seg_cnt == 0))
1416 goto out_err;
1417
1418 prm->cmd->sg_mapped = 1;
1419
1420 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1421 /*
1422 * If greater than four sg entries then we need to allocate
1423 * the continuation entries
1424 */
1425 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1426 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1427 prm->tgt->datasegs_per_cmd,
1428 prm->tgt->datasegs_per_cont);
1429 } else {
1430 /* DIF */
1431 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1432 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1433 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1434 prm->tot_dsds = prm->seg_cnt;
1435 } else
1436 prm->tot_dsds = prm->seg_cnt;
1437
1438 if (cmd->prot_sg_cnt) {
1439 prm->prot_sg = cmd->prot_sg;
1440 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1441 cmd->prot_sg, cmd->prot_sg_cnt,
1442 cmd->dma_data_direction);
1443 if (unlikely(prm->prot_seg_cnt == 0))
1444 goto out_err;
1445
1446 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1447 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1448 /* Dif Bundling not support here */
1449 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1450 cmd->blk_sz);
1451 prm->tot_dsds += prm->prot_seg_cnt;
1452 } else
1453 prm->tot_dsds += prm->prot_seg_cnt;
1454 }
1455 }
1456
1457 return 0;
1458
1459 out_err:
1460 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1461 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1462 0, prm->cmd->sg_cnt);
1463 return -1;
1464 }
1465
1466 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1467 {
1468 struct qla_hw_data *ha = vha->hw;
1469
1470 if (!cmd->sg_mapped)
1471 return;
1472
1473 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1474 cmd->sg_mapped = 0;
1475
1476 if (cmd->prot_sg_cnt)
1477 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1478 cmd->dma_data_direction);
1479
1480 if (cmd->ctx_dsd_alloced)
1481 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1482
1483 if (cmd->ctx)
1484 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1485 }
1486
1487 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1488 uint32_t req_cnt)
1489 {
1490 uint32_t cnt, cnt_in;
1491
1492 if (vha->req->cnt < (req_cnt + 2)) {
1493 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1494 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1495
1496 if (vha->req->ring_index < cnt)
1497 vha->req->cnt = cnt - vha->req->ring_index;
1498 else
1499 vha->req->cnt = vha->req->length -
1500 (vha->req->ring_index - cnt);
1501 }
1502
1503 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1504 ql_dbg(ql_dbg_io, vha, 0x305a,
1505 "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",
1506 vha->vp_idx, vha->req->ring_index,
1507 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1508 return -EAGAIN;
1509 }
1510 vha->req->cnt -= req_cnt;
1511
1512 return 0;
1513 }
1514
1515 /*
1516 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1517 */
1518 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1519 {
1520 /* Adjust ring index. */
1521 vha->req->ring_index++;
1522 if (vha->req->ring_index == vha->req->length) {
1523 vha->req->ring_index = 0;
1524 vha->req->ring_ptr = vha->req->ring;
1525 } else {
1526 vha->req->ring_ptr++;
1527 }
1528 return (cont_entry_t *)vha->req->ring_ptr;
1529 }
1530
1531 /* ha->hardware_lock supposed to be held on entry */
1532 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1533 {
1534 struct qla_hw_data *ha = vha->hw;
1535 uint32_t h;
1536
1537 h = ha->tgt.current_handle;
1538 /* always increment cmd handle */
1539 do {
1540 ++h;
1541 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1542 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1543 if (h == ha->tgt.current_handle) {
1544 ql_dbg(ql_dbg_io, vha, 0x305b,
1545 "qla_target(%d): Ran out of "
1546 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1547 h = QLA_TGT_NULL_HANDLE;
1548 break;
1549 }
1550 } while ((h == QLA_TGT_NULL_HANDLE) ||
1551 (h == QLA_TGT_SKIP_HANDLE) ||
1552 (ha->tgt.cmds[h-1] != NULL));
1553
1554 if (h != QLA_TGT_NULL_HANDLE)
1555 ha->tgt.current_handle = h;
1556
1557 return h;
1558 }
1559
1560 /* ha->hardware_lock supposed to be held on entry */
1561 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1562 struct scsi_qla_host *vha)
1563 {
1564 uint32_t h;
1565 struct ctio7_to_24xx *pkt;
1566 struct qla_hw_data *ha = vha->hw;
1567 struct atio_from_isp *atio = &prm->cmd->atio;
1568 uint16_t temp;
1569
1570 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1571 prm->pkt = pkt;
1572 memset(pkt, 0, sizeof(*pkt));
1573
1574 pkt->entry_type = CTIO_TYPE7;
1575 pkt->entry_count = (uint8_t)prm->req_cnt;
1576 pkt->vp_index = vha->vp_idx;
1577
1578 h = qlt_make_handle(vha);
1579 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1580 /*
1581 * CTIO type 7 from the firmware doesn't provide a way to
1582 * know the initiator's LOOP ID, hence we can't find
1583 * the session and, so, the command.
1584 */
1585 return -EAGAIN;
1586 } else
1587 ha->tgt.cmds[h-1] = prm->cmd;
1588
1589 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1590 pkt->nport_handle = prm->cmd->loop_id;
1591 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1592 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1593 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1594 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1595 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1596 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1597 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1598 pkt->u.status0.ox_id = cpu_to_le16(temp);
1599 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1600
1601 return 0;
1602 }
1603
1604 /*
1605 * ha->hardware_lock supposed to be held on entry. We have already made sure
1606 * that there is sufficient amount of request entries to not drop it.
1607 */
1608 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1609 struct scsi_qla_host *vha)
1610 {
1611 int cnt;
1612 uint32_t *dword_ptr;
1613 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1614
1615 /* Build continuation packets */
1616 while (prm->seg_cnt > 0) {
1617 cont_a64_entry_t *cont_pkt64 =
1618 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1619
1620 /*
1621 * Make sure that from cont_pkt64 none of
1622 * 64-bit specific fields used for 32-bit
1623 * addressing. Cast to (cont_entry_t *) for
1624 * that.
1625 */
1626
1627 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1628
1629 cont_pkt64->entry_count = 1;
1630 cont_pkt64->sys_define = 0;
1631
1632 if (enable_64bit_addressing) {
1633 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1634 dword_ptr =
1635 (uint32_t *)&cont_pkt64->dseg_0_address;
1636 } else {
1637 cont_pkt64->entry_type = CONTINUE_TYPE;
1638 dword_ptr =
1639 (uint32_t *)&((cont_entry_t *)
1640 cont_pkt64)->dseg_0_address;
1641 }
1642
1643 /* Load continuation entry data segments */
1644 for (cnt = 0;
1645 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1646 cnt++, prm->seg_cnt--) {
1647 *dword_ptr++ =
1648 cpu_to_le32(pci_dma_lo32
1649 (sg_dma_address(prm->sg)));
1650 if (enable_64bit_addressing) {
1651 *dword_ptr++ =
1652 cpu_to_le32(pci_dma_hi32
1653 (sg_dma_address
1654 (prm->sg)));
1655 }
1656 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1657
1658 prm->sg = sg_next(prm->sg);
1659 }
1660 }
1661 }
1662
1663 /*
1664 * ha->hardware_lock supposed to be held on entry. We have already made sure
1665 * that there is sufficient amount of request entries to not drop it.
1666 */
1667 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1668 struct scsi_qla_host *vha)
1669 {
1670 int cnt;
1671 uint32_t *dword_ptr;
1672 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1673 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1674
1675 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1676
1677 /* Setup packet address segment pointer */
1678 dword_ptr = pkt24->u.status0.dseg_0_address;
1679
1680 /* Set total data segment count */
1681 if (prm->seg_cnt)
1682 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1683
1684 if (prm->seg_cnt == 0) {
1685 /* No data transfer */
1686 *dword_ptr++ = 0;
1687 *dword_ptr = 0;
1688 return;
1689 }
1690
1691 /* If scatter gather */
1692
1693 /* Load command entry data segments */
1694 for (cnt = 0;
1695 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1696 cnt++, prm->seg_cnt--) {
1697 *dword_ptr++ =
1698 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1699 if (enable_64bit_addressing) {
1700 *dword_ptr++ =
1701 cpu_to_le32(pci_dma_hi32(
1702 sg_dma_address(prm->sg)));
1703 }
1704 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1705
1706 prm->sg = sg_next(prm->sg);
1707 }
1708
1709 qlt_load_cont_data_segments(prm, vha);
1710 }
1711
1712 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1713 {
1714 return cmd->bufflen > 0;
1715 }
1716
1717 /*
1718 * Called without ha->hardware_lock held
1719 */
1720 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1721 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1722 uint32_t *full_req_cnt)
1723 {
1724 struct qla_tgt *tgt = cmd->tgt;
1725 struct scsi_qla_host *vha = tgt->vha;
1726 struct qla_hw_data *ha = vha->hw;
1727 struct se_cmd *se_cmd = &cmd->se_cmd;
1728
1729 if (unlikely(cmd->aborted)) {
1730 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1731 "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)",
1732 vha->vp_idx, cmd, se_cmd, se_cmd->tag);
1733
1734 cmd->state = QLA_TGT_STATE_ABORTED;
1735 cmd->cmd_flags |= BIT_6;
1736
1737 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1738
1739 /* !! At this point cmd could be already freed !! */
1740 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1741 }
1742
1743 prm->cmd = cmd;
1744 prm->tgt = tgt;
1745 prm->rq_result = scsi_status;
1746 prm->sense_buffer = &cmd->sense_buffer[0];
1747 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1748 prm->sg = NULL;
1749 prm->seg_cnt = -1;
1750 prm->req_cnt = 1;
1751 prm->add_status_pkt = 0;
1752
1753 /* Send marker if required */
1754 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1755 return -EFAULT;
1756
1757 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1758 if (qlt_pci_map_calc_cnt(prm) != 0)
1759 return -EAGAIN;
1760 }
1761
1762 *full_req_cnt = prm->req_cnt;
1763
1764 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1765 prm->residual = se_cmd->residual_count;
1766 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1767 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1768 prm->residual, se_cmd->tag,
1769 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1770 cmd->bufflen, prm->rq_result);
1771 prm->rq_result |= SS_RESIDUAL_UNDER;
1772 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1773 prm->residual = se_cmd->residual_count;
1774 ql_dbg(ql_dbg_io, vha, 0x305d,
1775 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1776 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1777 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1778 prm->rq_result |= SS_RESIDUAL_OVER;
1779 }
1780
1781 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1782 /*
1783 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1784 * ignored in *xmit_response() below
1785 */
1786 if (qlt_has_data(cmd)) {
1787 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1788 (IS_FWI2_CAPABLE(ha) &&
1789 (prm->rq_result != 0))) {
1790 prm->add_status_pkt = 1;
1791 (*full_req_cnt)++;
1792 }
1793 }
1794 }
1795
1796 return 0;
1797 }
1798
1799 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1800 struct qla_tgt_cmd *cmd, int sending_sense)
1801 {
1802 if (ha->tgt.enable_class_2)
1803 return 0;
1804
1805 if (sending_sense)
1806 return cmd->conf_compl_supported;
1807 else
1808 return ha->tgt.enable_explicit_conf &&
1809 cmd->conf_compl_supported;
1810 }
1811
1812 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1813 /*
1814 * Original taken from the XFS code
1815 */
1816 static unsigned long qlt_srr_random(void)
1817 {
1818 static int Inited;
1819 static unsigned long RandomValue;
1820 static DEFINE_SPINLOCK(lock);
1821 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1822 register long rv;
1823 register long lo;
1824 register long hi;
1825 unsigned long flags;
1826
1827 spin_lock_irqsave(&lock, flags);
1828 if (!Inited) {
1829 RandomValue = jiffies;
1830 Inited = 1;
1831 }
1832 rv = RandomValue;
1833 hi = rv / 127773;
1834 lo = rv % 127773;
1835 rv = 16807 * lo - 2836 * hi;
1836 if (rv <= 0)
1837 rv += 2147483647;
1838 RandomValue = rv;
1839 spin_unlock_irqrestore(&lock, flags);
1840 return rv;
1841 }
1842
1843 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1844 {
1845 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1846 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1847 == 50) {
1848 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1849 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1850 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
1851 }
1852 #endif
1853 /*
1854 * It's currently not possible to simulate SRRs for FCP_WRITE without
1855 * a physical link layer failure, so don't even try here..
1856 */
1857 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1858 return;
1859
1860 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1861 ((qlt_srr_random() % 100) == 20)) {
1862 int i, leave = 0;
1863 unsigned int tot_len = 0;
1864
1865 while (leave == 0)
1866 leave = qlt_srr_random() % cmd->sg_cnt;
1867
1868 for (i = 0; i < leave; i++)
1869 tot_len += cmd->sg[i].length;
1870
1871 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1872 "Cutting cmd %p (tag %d) buffer"
1873 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1874 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
1875 cmd->bufflen, cmd->sg_cnt);
1876
1877 cmd->bufflen = tot_len;
1878 cmd->sg_cnt = leave;
1879 }
1880
1881 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1882 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1883
1884 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1885 "Cutting cmd %p (tag %d) buffer head "
1886 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
1887 cmd->bufflen);
1888 if (offset == 0)
1889 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1890 else if (qlt_set_data_offset(cmd, offset)) {
1891 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1892 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
1893 }
1894 }
1895 }
1896 #else
1897 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1898 {}
1899 #endif
1900
1901 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1902 struct qla_tgt_prm *prm)
1903 {
1904 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1905 (uint32_t)sizeof(ctio->u.status1.sense_data));
1906 ctio->u.status0.flags |=
1907 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1908 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1909 ctio->u.status0.flags |= __constant_cpu_to_le16(
1910 CTIO7_FLAGS_EXPLICIT_CONFORM |
1911 CTIO7_FLAGS_CONFORM_REQ);
1912 }
1913 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1914 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1915 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1916 int i;
1917
1918 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1919 if (prm->cmd->se_cmd.scsi_status != 0) {
1920 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1921 "Skipping EXPLICIT_CONFORM and "
1922 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1923 "non GOOD status\n");
1924 goto skip_explict_conf;
1925 }
1926 ctio->u.status1.flags |= __constant_cpu_to_le16(
1927 CTIO7_FLAGS_EXPLICIT_CONFORM |
1928 CTIO7_FLAGS_CONFORM_REQ);
1929 }
1930 skip_explict_conf:
1931 ctio->u.status1.flags &=
1932 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1933 ctio->u.status1.flags |=
1934 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1935 ctio->u.status1.scsi_status |=
1936 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1937 ctio->u.status1.sense_length =
1938 cpu_to_le16(prm->sense_buffer_len);
1939 for (i = 0; i < prm->sense_buffer_len/4; i++)
1940 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1941 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1942 #if 0
1943 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1944 static int q;
1945 if (q < 10) {
1946 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1947 "qla_target(%d): %d bytes of sense "
1948 "lost", prm->tgt->ha->vp_idx,
1949 prm->sense_buffer_len % 4);
1950 q++;
1951 }
1952 }
1953 #endif
1954 } else {
1955 ctio->u.status1.flags &=
1956 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1957 ctio->u.status1.flags |=
1958 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1959 ctio->u.status1.sense_length = 0;
1960 memset(ctio->u.status1.sense_data, 0,
1961 sizeof(ctio->u.status1.sense_data));
1962 }
1963
1964 /* Sense with len > 24, is it possible ??? */
1965 }
1966
1967
1968
1969 /* diff */
1970 static inline int
1971 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1972 {
1973 /*
1974 * Uncomment when corresponding SCSI changes are done.
1975 *
1976 if (!sp->cmd->prot_chk)
1977 return 0;
1978 *
1979 */
1980 switch (se_cmd->prot_op) {
1981 case TARGET_PROT_DOUT_INSERT:
1982 case TARGET_PROT_DIN_STRIP:
1983 if (ql2xenablehba_err_chk >= 1)
1984 return 1;
1985 break;
1986 case TARGET_PROT_DOUT_PASS:
1987 case TARGET_PROT_DIN_PASS:
1988 if (ql2xenablehba_err_chk >= 2)
1989 return 1;
1990 break;
1991 case TARGET_PROT_DIN_INSERT:
1992 case TARGET_PROT_DOUT_STRIP:
1993 return 1;
1994 default:
1995 break;
1996 }
1997 return 0;
1998 }
1999
2000 /*
2001 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2002 *
2003 */
2004 static inline void
2005 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2006 {
2007 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2008
2009 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2010 * have been immplemented by TCM, before AppTag is avail.
2011 * Look for modesense_handlers[]
2012 */
2013 ctx->app_tag = 0;
2014 ctx->app_tag_mask[0] = 0x0;
2015 ctx->app_tag_mask[1] = 0x0;
2016
2017 switch (se_cmd->prot_type) {
2018 case TARGET_DIF_TYPE0_PROT:
2019 /*
2020 * No check for ql2xenablehba_err_chk, as it would be an
2021 * I/O error if hba tag generation is not done.
2022 */
2023 ctx->ref_tag = cpu_to_le32(lba);
2024
2025 if (!qlt_hba_err_chk_enabled(se_cmd))
2026 break;
2027
2028 /* enable ALL bytes of the ref tag */
2029 ctx->ref_tag_mask[0] = 0xff;
2030 ctx->ref_tag_mask[1] = 0xff;
2031 ctx->ref_tag_mask[2] = 0xff;
2032 ctx->ref_tag_mask[3] = 0xff;
2033 break;
2034 /*
2035 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2036 * 16 bit app tag.
2037 */
2038 case TARGET_DIF_TYPE1_PROT:
2039 ctx->ref_tag = cpu_to_le32(lba);
2040
2041 if (!qlt_hba_err_chk_enabled(se_cmd))
2042 break;
2043
2044 /* enable ALL bytes of the ref tag */
2045 ctx->ref_tag_mask[0] = 0xff;
2046 ctx->ref_tag_mask[1] = 0xff;
2047 ctx->ref_tag_mask[2] = 0xff;
2048 ctx->ref_tag_mask[3] = 0xff;
2049 break;
2050 /*
2051 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2052 * match LBA in CDB + N
2053 */
2054 case TARGET_DIF_TYPE2_PROT:
2055 ctx->ref_tag = cpu_to_le32(lba);
2056
2057 if (!qlt_hba_err_chk_enabled(se_cmd))
2058 break;
2059
2060 /* enable ALL bytes of the ref tag */
2061 ctx->ref_tag_mask[0] = 0xff;
2062 ctx->ref_tag_mask[1] = 0xff;
2063 ctx->ref_tag_mask[2] = 0xff;
2064 ctx->ref_tag_mask[3] = 0xff;
2065 break;
2066
2067 /* For Type 3 protection: 16 bit GUARD only */
2068 case TARGET_DIF_TYPE3_PROT:
2069 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2070 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2071 break;
2072 }
2073 }
2074
2075
2076 static inline int
2077 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2078 {
2079 uint32_t *cur_dsd;
2080 int sgc;
2081 uint32_t transfer_length = 0;
2082 uint32_t data_bytes;
2083 uint32_t dif_bytes;
2084 uint8_t bundling = 1;
2085 uint8_t *clr_ptr;
2086 struct crc_context *crc_ctx_pkt = NULL;
2087 struct qla_hw_data *ha;
2088 struct ctio_crc2_to_fw *pkt;
2089 dma_addr_t crc_ctx_dma;
2090 uint16_t fw_prot_opts = 0;
2091 struct qla_tgt_cmd *cmd = prm->cmd;
2092 struct se_cmd *se_cmd = &cmd->se_cmd;
2093 uint32_t h;
2094 struct atio_from_isp *atio = &prm->cmd->atio;
2095 uint16_t t16;
2096
2097 sgc = 0;
2098 ha = vha->hw;
2099
2100 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2101 prm->pkt = pkt;
2102 memset(pkt, 0, sizeof(*pkt));
2103
2104 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2105 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2106 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2107 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2108
2109 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2110 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2111 bundling = 0;
2112
2113 /* Compute dif len and adjust data len to incude protection */
2114 data_bytes = cmd->bufflen;
2115 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2116
2117 switch (se_cmd->prot_op) {
2118 case TARGET_PROT_DIN_INSERT:
2119 case TARGET_PROT_DOUT_STRIP:
2120 transfer_length = data_bytes;
2121 data_bytes += dif_bytes;
2122 break;
2123
2124 case TARGET_PROT_DIN_STRIP:
2125 case TARGET_PROT_DOUT_INSERT:
2126 case TARGET_PROT_DIN_PASS:
2127 case TARGET_PROT_DOUT_PASS:
2128 transfer_length = data_bytes + dif_bytes;
2129 break;
2130
2131 default:
2132 BUG();
2133 break;
2134 }
2135
2136 if (!qlt_hba_err_chk_enabled(se_cmd))
2137 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2138 /* HBA error checking enabled */
2139 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2140 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2141 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2142 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2143 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2144 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2145 }
2146
2147 switch (se_cmd->prot_op) {
2148 case TARGET_PROT_DIN_INSERT:
2149 case TARGET_PROT_DOUT_INSERT:
2150 fw_prot_opts |= PO_MODE_DIF_INSERT;
2151 break;
2152 case TARGET_PROT_DIN_STRIP:
2153 case TARGET_PROT_DOUT_STRIP:
2154 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2155 break;
2156 case TARGET_PROT_DIN_PASS:
2157 case TARGET_PROT_DOUT_PASS:
2158 fw_prot_opts |= PO_MODE_DIF_PASS;
2159 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2160 break;
2161 default:/* Normal Request */
2162 fw_prot_opts |= PO_MODE_DIF_PASS;
2163 break;
2164 }
2165
2166
2167 /* ---- PKT ---- */
2168 /* Update entry type to indicate Command Type CRC_2 IOCB */
2169 pkt->entry_type = CTIO_CRC2;
2170 pkt->entry_count = 1;
2171 pkt->vp_index = vha->vp_idx;
2172
2173 h = qlt_make_handle(vha);
2174 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2175 /*
2176 * CTIO type 7 from the firmware doesn't provide a way to
2177 * know the initiator's LOOP ID, hence we can't find
2178 * the session and, so, the command.
2179 */
2180 return -EAGAIN;
2181 } else
2182 ha->tgt.cmds[h-1] = prm->cmd;
2183
2184
2185 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2186 pkt->nport_handle = prm->cmd->loop_id;
2187 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2188 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2189 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2190 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2191 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2192
2193 /* silence compile warning */
2194 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2195 pkt->ox_id = cpu_to_le16(t16);
2196
2197 t16 = (atio->u.isp24.attr << 9);
2198 pkt->flags |= cpu_to_le16(t16);
2199 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2200
2201 /* Set transfer direction */
2202 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2203 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2204 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2205 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2206
2207
2208 pkt->dseg_count = prm->tot_dsds;
2209 /* Fibre channel byte count */
2210 pkt->transfer_length = cpu_to_le32(transfer_length);
2211
2212
2213 /* ----- CRC context -------- */
2214
2215 /* Allocate CRC context from global pool */
2216 crc_ctx_pkt = cmd->ctx =
2217 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2218
2219 if (!crc_ctx_pkt)
2220 goto crc_queuing_error;
2221
2222 /* Zero out CTX area. */
2223 clr_ptr = (uint8_t *)crc_ctx_pkt;
2224 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2225
2226 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2227 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2228
2229 /* Set handle */
2230 crc_ctx_pkt->handle = pkt->handle;
2231
2232 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2233
2234 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2235 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2236 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2237
2238
2239 if (!bundling) {
2240 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2241 } else {
2242 /*
2243 * Configure Bundling if we need to fetch interlaving
2244 * protection PCI accesses
2245 */
2246 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2247 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2248 crc_ctx_pkt->u.bundling.dseg_count =
2249 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2250 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2251 }
2252
2253 /* Finish the common fields of CRC pkt */
2254 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2255 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2256 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2257 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2258
2259
2260 /* Walks data segments */
2261 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2262
2263 if (!bundling && prm->prot_seg_cnt) {
2264 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2265 prm->tot_dsds, cmd))
2266 goto crc_queuing_error;
2267 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2268 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2269 goto crc_queuing_error;
2270
2271 if (bundling && prm->prot_seg_cnt) {
2272 /* Walks dif segments */
2273 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2274
2275 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2276 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2277 prm->prot_seg_cnt, cmd))
2278 goto crc_queuing_error;
2279 }
2280 return QLA_SUCCESS;
2281
2282 crc_queuing_error:
2283 /* Cleanup will be performed by the caller */
2284
2285 return QLA_FUNCTION_FAILED;
2286 }
2287
2288
2289 /*
2290 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2291 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2292 */
2293 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2294 uint8_t scsi_status)
2295 {
2296 struct scsi_qla_host *vha = cmd->vha;
2297 struct qla_hw_data *ha = vha->hw;
2298 struct ctio7_to_24xx *pkt;
2299 struct qla_tgt_prm prm;
2300 uint32_t full_req_cnt = 0;
2301 unsigned long flags = 0;
2302 int res;
2303
2304 memset(&prm, 0, sizeof(prm));
2305 qlt_check_srr_debug(cmd, &xmit_type);
2306
2307 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2308 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2309 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2310 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2311 &cmd->se_cmd);
2312
2313 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2314 &full_req_cnt);
2315 if (unlikely(res != 0)) {
2316 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2317 return 0;
2318
2319 return res;
2320 }
2321
2322 spin_lock_irqsave(&ha->hardware_lock, flags);
2323
2324 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2325 /*
2326 * Either a chip reset is active or this request was from
2327 * previous life, just abort the processing.
2328 */
2329 cmd->state = QLA_TGT_STATE_PROCESSED;
2330 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2331 ql_dbg(ql_dbg_async, vha, 0xe101,
2332 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2333 qla2x00_reset_active(vha), cmd->reset_count,
2334 ha->chip_reset);
2335 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2336 return 0;
2337 }
2338
2339 /* Does F/W have an IOCBs for this request */
2340 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2341 if (unlikely(res))
2342 goto out_unmap_unlock;
2343
2344 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2345 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2346 else
2347 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2348 if (unlikely(res != 0))
2349 goto out_unmap_unlock;
2350
2351
2352 pkt = (struct ctio7_to_24xx *)prm.pkt;
2353
2354 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2355 pkt->u.status0.flags |=
2356 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2357 CTIO7_FLAGS_STATUS_MODE_0);
2358
2359 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2360 qlt_load_data_segments(&prm, vha);
2361
2362 if (prm.add_status_pkt == 0) {
2363 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2364 pkt->u.status0.scsi_status =
2365 cpu_to_le16(prm.rq_result);
2366 pkt->u.status0.residual =
2367 cpu_to_le32(prm.residual);
2368 pkt->u.status0.flags |= __constant_cpu_to_le16(
2369 CTIO7_FLAGS_SEND_STATUS);
2370 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2371 pkt->u.status0.flags |=
2372 __constant_cpu_to_le16(
2373 CTIO7_FLAGS_EXPLICIT_CONFORM |
2374 CTIO7_FLAGS_CONFORM_REQ);
2375 }
2376 }
2377
2378 } else {
2379 /*
2380 * We have already made sure that there is sufficient
2381 * amount of request entries to not drop HW lock in
2382 * req_pkt().
2383 */
2384 struct ctio7_to_24xx *ctio =
2385 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2386
2387 ql_dbg(ql_dbg_io, vha, 0x305e,
2388 "Building additional status packet 0x%p.\n",
2389 ctio);
2390
2391 /*
2392 * T10Dif: ctio_crc2_to_fw overlay ontop of
2393 * ctio7_to_24xx
2394 */
2395 memcpy(ctio, pkt, sizeof(*ctio));
2396 /* reset back to CTIO7 */
2397 ctio->entry_count = 1;
2398 ctio->entry_type = CTIO_TYPE7;
2399 ctio->dseg_count = 0;
2400 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2401 CTIO7_FLAGS_DATA_IN);
2402
2403 /* Real finish is ctio_m1's finish */
2404 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2405 pkt->u.status0.flags |= __constant_cpu_to_le16(
2406 CTIO7_FLAGS_DONT_RET_CTIO);
2407
2408 /* qlt_24xx_init_ctio_to_isp will correct
2409 * all neccessary fields that's part of CTIO7.
2410 * There should be no residual of CTIO-CRC2 data.
2411 */
2412 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2413 &prm);
2414 pr_debug("Status CTIO7: %p\n", ctio);
2415 }
2416 } else
2417 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2418
2419
2420 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2421 cmd->cmd_sent_to_fw = 1;
2422
2423 /* Memory Barrier */
2424 wmb();
2425 qla2x00_start_iocbs(vha, vha->req);
2426 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2427
2428 return 0;
2429
2430 out_unmap_unlock:
2431 qlt_unmap_sg(vha, cmd);
2432 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2433
2434 return res;
2435 }
2436 EXPORT_SYMBOL(qlt_xmit_response);
2437
2438 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2439 {
2440 struct ctio7_to_24xx *pkt;
2441 struct scsi_qla_host *vha = cmd->vha;
2442 struct qla_hw_data *ha = vha->hw;
2443 struct qla_tgt *tgt = cmd->tgt;
2444 struct qla_tgt_prm prm;
2445 unsigned long flags;
2446 int res = 0;
2447
2448 memset(&prm, 0, sizeof(prm));
2449 prm.cmd = cmd;
2450 prm.tgt = tgt;
2451 prm.sg = NULL;
2452 prm.req_cnt = 1;
2453
2454 /* Send marker if required */
2455 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2456 return -EIO;
2457
2458 /* Calculate number of entries and segments required */
2459 if (qlt_pci_map_calc_cnt(&prm) != 0)
2460 return -EAGAIN;
2461
2462 spin_lock_irqsave(&ha->hardware_lock, flags);
2463
2464 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2465 /*
2466 * Either a chip reset is active or this request was from
2467 * previous life, just abort the processing.
2468 */
2469 cmd->state = QLA_TGT_STATE_NEED_DATA;
2470 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2471 ql_dbg(ql_dbg_async, vha, 0xe102,
2472 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2473 qla2x00_reset_active(vha), cmd->reset_count,
2474 ha->chip_reset);
2475 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2476 return 0;
2477 }
2478
2479 /* Does F/W have an IOCBs for this request */
2480 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2481 if (res != 0)
2482 goto out_unlock_free_unmap;
2483 if (cmd->se_cmd.prot_op)
2484 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2485 else
2486 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2487
2488 if (unlikely(res != 0))
2489 goto out_unlock_free_unmap;
2490 pkt = (struct ctio7_to_24xx *)prm.pkt;
2491 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2492 CTIO7_FLAGS_STATUS_MODE_0);
2493
2494 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2495 qlt_load_data_segments(&prm, vha);
2496
2497 cmd->state = QLA_TGT_STATE_NEED_DATA;
2498 cmd->cmd_sent_to_fw = 1;
2499
2500 /* Memory Barrier */
2501 wmb();
2502 qla2x00_start_iocbs(vha, vha->req);
2503 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2504
2505 return res;
2506
2507 out_unlock_free_unmap:
2508 qlt_unmap_sg(vha, cmd);
2509 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2510
2511 return res;
2512 }
2513 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2514
2515
2516 /*
2517 * Checks the guard or meta-data for the type of error
2518 * detected by the HBA.
2519 */
2520 static inline int
2521 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2522 struct ctio_crc_from_fw *sts)
2523 {
2524 uint8_t *ap = &sts->actual_dif[0];
2525 uint8_t *ep = &sts->expected_dif[0];
2526 uint32_t e_ref_tag, a_ref_tag;
2527 uint16_t e_app_tag, a_app_tag;
2528 uint16_t e_guard, a_guard;
2529 uint64_t lba = cmd->se_cmd.t_task_lba;
2530
2531 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2532 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2533 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2534
2535 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2536 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2537 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2538
2539 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2540 "iocb(s) %p Returned STATUS.\n", sts);
2541
2542 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2543 "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",
2544 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2545 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2546
2547 /*
2548 * Ignore sector if:
2549 * For type 3: ref & app tag is all 'f's
2550 * For type 0,1,2: app tag is all 'f's
2551 */
2552 if ((a_app_tag == 0xffff) &&
2553 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2554 (a_ref_tag == 0xffffffff))) {
2555 uint32_t blocks_done;
2556
2557 /* 2TB boundary case covered automatically with this */
2558 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2559 cmd->se_cmd.bad_sector = e_ref_tag;
2560 cmd->se_cmd.pi_err = 0;
2561 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2562 "need to return scsi good\n");
2563
2564 /* Update protection tag */
2565 if (cmd->prot_sg_cnt) {
2566 uint32_t i, j = 0, k = 0, num_ent;
2567 struct scatterlist *sg, *sgl;
2568
2569
2570 sgl = cmd->prot_sg;
2571
2572 /* Patch the corresponding protection tags */
2573 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2574 num_ent = sg_dma_len(sg) / 8;
2575 if (k + num_ent < blocks_done) {
2576 k += num_ent;
2577 continue;
2578 }
2579 j = blocks_done - k - 1;
2580 k = blocks_done;
2581 break;
2582 }
2583
2584 if (k != blocks_done) {
2585 ql_log(ql_log_warn, vha, 0xf076,
2586 "unexpected tag values tag:lba=%u:%llu)\n",
2587 e_ref_tag, (unsigned long long)lba);
2588 goto out;
2589 }
2590
2591 #if 0
2592 struct sd_dif_tuple *spt;
2593 /* TODO:
2594 * This section came from initiator. Is it valid here?
2595 * should ulp be override with actual val???
2596 */
2597 spt = page_address(sg_page(sg)) + sg->offset;
2598 spt += j;
2599
2600 spt->app_tag = 0xffff;
2601 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2602 spt->ref_tag = 0xffffffff;
2603 #endif
2604 }
2605
2606 return 0;
2607 }
2608
2609 /* check guard */
2610 if (e_guard != a_guard) {
2611 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2612 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2613
2614 ql_log(ql_log_warn, vha, 0xe076,
2615 "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",
2616 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2617 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2618 a_guard, e_guard, cmd);
2619 goto out;
2620 }
2621
2622 /* check ref tag */
2623 if (e_ref_tag != a_ref_tag) {
2624 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2625 cmd->se_cmd.bad_sector = e_ref_tag;
2626
2627 ql_log(ql_log_warn, vha, 0xe077,
2628 "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",
2629 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2630 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2631 a_guard, e_guard, cmd);
2632 goto out;
2633 }
2634
2635 /* check appl tag */
2636 if (e_app_tag != a_app_tag) {
2637 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2638 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2639
2640 ql_log(ql_log_warn, vha, 0xe078,
2641 "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",
2642 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2643 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2644 a_guard, e_guard, cmd);
2645 goto out;
2646 }
2647 out:
2648 return 1;
2649 }
2650
2651
2652 /* If hardware_lock held on entry, might drop it, then reaquire */
2653 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2654 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2655 struct qla_tgt_cmd *cmd,
2656 struct atio_from_isp *atio)
2657 {
2658 struct ctio7_to_24xx *ctio24;
2659 struct qla_hw_data *ha = vha->hw;
2660 request_t *pkt;
2661 int ret = 0;
2662 uint16_t temp;
2663
2664 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2665
2666 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2667 if (pkt == NULL) {
2668 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2669 "qla_target(%d): %s failed: unable to allocate "
2670 "request packet\n", vha->vp_idx, __func__);
2671 return -ENOMEM;
2672 }
2673
2674 if (cmd != NULL) {
2675 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2676 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2677 "qla_target(%d): Terminating cmd %p with "
2678 "incorrect state %d\n", vha->vp_idx, cmd,
2679 cmd->state);
2680 } else
2681 ret = 1;
2682 }
2683
2684 pkt->entry_count = 1;
2685 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2686
2687 ctio24 = (struct ctio7_to_24xx *)pkt;
2688 ctio24->entry_type = CTIO_TYPE7;
2689 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2690 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2691 ctio24->vp_index = vha->vp_idx;
2692 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2693 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2694 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2695 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2696 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2697 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2698 CTIO7_FLAGS_TERMINATE);
2699 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2700 ctio24->u.status1.ox_id = cpu_to_le16(temp);
2701
2702 /* Most likely, it isn't needed */
2703 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2704 &atio->u.isp24.fcp_cmnd.add_cdb[
2705 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2706 if (ctio24->u.status1.residual != 0)
2707 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2708
2709 /* Memory Barrier */
2710 wmb();
2711 qla2x00_start_iocbs(vha, vha->req);
2712 return ret;
2713 }
2714
2715 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2716 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2717 {
2718 unsigned long flags;
2719 int rc;
2720
2721 if (qlt_issue_marker(vha, ha_locked) < 0)
2722 return;
2723
2724 if (ha_locked) {
2725 rc = __qlt_send_term_exchange(vha, cmd, atio);
2726 if (rc == -ENOMEM)
2727 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2728 goto done;
2729 }
2730 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2731 rc = __qlt_send_term_exchange(vha, cmd, atio);
2732 if (rc == -ENOMEM)
2733 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2734 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2735
2736 done:
2737 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2738 !cmd->cmd_sent_to_fw)) {
2739 if (!ha_locked && !in_interrupt())
2740 msleep(250); /* just in case */
2741
2742 qlt_unmap_sg(vha, cmd);
2743 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2744 }
2745 return;
2746 }
2747
2748 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2749 {
2750 struct list_head free_list;
2751 struct qla_tgt_cmd *cmd, *tcmd;
2752
2753 vha->hw->tgt.leak_exchg_thresh_hold =
2754 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2755
2756 cmd = tcmd = NULL;
2757 if (!list_empty(&vha->hw->tgt.q_full_list)) {
2758 INIT_LIST_HEAD(&free_list);
2759 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2760
2761 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2762 list_del(&cmd->cmd_list);
2763 /* This cmd was never sent to TCM. There is no need
2764 * to schedule free or call free_cmd
2765 */
2766 qlt_free_cmd(cmd);
2767 vha->hw->tgt.num_qfull_cmds_alloc--;
2768 }
2769 }
2770 vha->hw->tgt.num_qfull_cmds_dropped = 0;
2771 }
2772
2773 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2774 {
2775 uint32_t total_leaked;
2776
2777 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2778
2779 if (vha->hw->tgt.leak_exchg_thresh_hold &&
2780 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2781
2782 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2783 "Chip reset due to exchange starvation: %d/%d.\n",
2784 total_leaked, vha->hw->fw_xcb_count);
2785
2786 if (IS_P3P_TYPE(vha->hw))
2787 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2788 else
2789 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2790 qla2xxx_wake_dpc(vha);
2791 }
2792
2793 }
2794
2795 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2796 {
2797 struct qla_tgt_sess *sess = cmd->sess;
2798
2799 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2800 "%s: se_cmd[%p] ox_id %04x\n",
2801 __func__, &cmd->se_cmd,
2802 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2803
2804 BUG_ON(cmd->cmd_in_wq);
2805
2806 if (!cmd->q_full)
2807 qlt_decr_num_pend_cmds(cmd->vha);
2808
2809 BUG_ON(cmd->sg_mapped);
2810 cmd->jiffies_at_free = get_jiffies_64();
2811 if (unlikely(cmd->free_sg))
2812 kfree(cmd->sg);
2813
2814 if (!sess || !sess->se_sess) {
2815 WARN_ON(1);
2816 return;
2817 }
2818 cmd->jiffies_at_free = get_jiffies_64();
2819 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2820 }
2821 EXPORT_SYMBOL(qlt_free_cmd);
2822
2823 /* ha->hardware_lock supposed to be held on entry */
2824 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2825 struct qla_tgt_cmd *cmd, void *ctio)
2826 {
2827 struct qla_tgt_srr_ctio *sc;
2828 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2829 struct qla_tgt_srr_imm *imm;
2830
2831 tgt->ctio_srr_id++;
2832 cmd->cmd_flags |= BIT_15;
2833
2834 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2835 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2836
2837 if (!ctio) {
2838 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2839 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2840 vha->vp_idx);
2841 return -EINVAL;
2842 }
2843
2844 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2845 if (sc != NULL) {
2846 sc->cmd = cmd;
2847 /* IRQ is already OFF */
2848 spin_lock(&tgt->srr_lock);
2849 sc->srr_id = tgt->ctio_srr_id;
2850 list_add_tail(&sc->srr_list_entry,
2851 &tgt->srr_ctio_list);
2852 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2853 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2854 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2855 int found = 0;
2856 list_for_each_entry(imm, &tgt->srr_imm_list,
2857 srr_list_entry) {
2858 if (imm->srr_id == sc->srr_id) {
2859 found = 1;
2860 break;
2861 }
2862 }
2863 if (found) {
2864 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2865 "Scheduling srr work\n");
2866 schedule_work(&tgt->srr_work);
2867 } else {
2868 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2869 "qla_target(%d): imm_srr_id "
2870 "== ctio_srr_id (%d), but there is no "
2871 "corresponding SRR IMM, deleting CTIO "
2872 "SRR %p\n", vha->vp_idx,
2873 tgt->ctio_srr_id, sc);
2874 list_del(&sc->srr_list_entry);
2875 spin_unlock(&tgt->srr_lock);
2876
2877 kfree(sc);
2878 return -EINVAL;
2879 }
2880 }
2881 spin_unlock(&tgt->srr_lock);
2882 } else {
2883 struct qla_tgt_srr_imm *ti;
2884
2885 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2886 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2887 vha->vp_idx);
2888 spin_lock(&tgt->srr_lock);
2889 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2890 srr_list_entry) {
2891 if (imm->srr_id == tgt->ctio_srr_id) {
2892 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2893 "IMM SRR %p deleted (id %d)\n",
2894 imm, imm->srr_id);
2895 list_del(&imm->srr_list_entry);
2896 qlt_reject_free_srr_imm(vha, imm, 1);
2897 }
2898 }
2899 spin_unlock(&tgt->srr_lock);
2900
2901 return -ENOMEM;
2902 }
2903
2904 return 0;
2905 }
2906
2907 /*
2908 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2909 */
2910 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2911 struct qla_tgt_cmd *cmd, uint32_t status)
2912 {
2913 int term = 0;
2914
2915 if (ctio != NULL) {
2916 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2917 term = !(c->flags &
2918 __constant_cpu_to_le16(OF_TERM_EXCH));
2919 } else
2920 term = 1;
2921
2922 if (term)
2923 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2924
2925 return term;
2926 }
2927
2928 /* ha->hardware_lock supposed to be held on entry */
2929 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2930 uint32_t handle)
2931 {
2932 struct qla_hw_data *ha = vha->hw;
2933
2934 handle--;
2935 if (ha->tgt.cmds[handle] != NULL) {
2936 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2937 ha->tgt.cmds[handle] = NULL;
2938 return cmd;
2939 } else
2940 return NULL;
2941 }
2942
2943 /* ha->hardware_lock supposed to be held on entry */
2944 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2945 uint32_t handle, void *ctio)
2946 {
2947 struct qla_tgt_cmd *cmd = NULL;
2948
2949 /* Clear out internal marks */
2950 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2951 CTIO_INTERMEDIATE_HANDLE_MARK);
2952
2953 if (handle != QLA_TGT_NULL_HANDLE) {
2954 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2955 return NULL;
2956
2957 /* handle-1 is actually used */
2958 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2959 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2960 "qla_target(%d): Wrong handle %x received\n",
2961 vha->vp_idx, handle);
2962 return NULL;
2963 }
2964 cmd = qlt_get_cmd(vha, handle);
2965 if (unlikely(cmd == NULL)) {
2966 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2967 "qla_target(%d): Suspicious: unable to "
2968 "find the command with handle %x\n", vha->vp_idx,
2969 handle);
2970 return NULL;
2971 }
2972 } else if (ctio != NULL) {
2973 /* We can't get loop ID from CTIO7 */
2974 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2975 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2976 "support NULL handles\n", vha->vp_idx);
2977 return NULL;
2978 }
2979
2980 return cmd;
2981 }
2982
2983 /* hardware_lock should be held by caller. */
2984 static void
2985 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2986 {
2987 struct qla_hw_data *ha = vha->hw;
2988 uint32_t handle;
2989
2990 if (cmd->sg_mapped)
2991 qlt_unmap_sg(vha, cmd);
2992
2993 handle = qlt_make_handle(vha);
2994
2995 /* TODO: fix debug message type and ids. */
2996 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2997 ql_dbg(ql_dbg_io, vha, 0xff00,
2998 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
2999 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3000 cmd->write_data_transferred = 0;
3001 cmd->state = QLA_TGT_STATE_DATA_IN;
3002
3003 ql_dbg(ql_dbg_io, vha, 0xff01,
3004 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3005
3006 ha->tgt.tgt_ops->handle_data(cmd);
3007 return;
3008 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3009 ql_dbg(ql_dbg_io, vha, 0xff02,
3010 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3011 } else {
3012 ql_dbg(ql_dbg_io, vha, 0xff03,
3013 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3014 cmd->state);
3015 dump_stack();
3016 }
3017
3018 cmd->cmd_flags |= BIT_12;
3019 ha->tgt.tgt_ops->free_cmd(cmd);
3020 }
3021
3022 void
3023 qlt_host_reset_handler(struct qla_hw_data *ha)
3024 {
3025 struct qla_tgt_cmd *cmd;
3026 unsigned long flags;
3027 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3028 scsi_qla_host_t *vha = NULL;
3029 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3030 uint32_t i;
3031
3032 if (!base_vha->hw->tgt.tgt_ops)
3033 return;
3034
3035 if (!tgt || qla_ini_mode_enabled(base_vha)) {
3036 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3037 "Target mode disabled\n");
3038 return;
3039 }
3040
3041 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3042 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3043 base_vha->dpc_flags);
3044
3045 spin_lock_irqsave(&ha->hardware_lock, flags);
3046 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3047 cmd = qlt_get_cmd(base_vha, i);
3048 if (!cmd)
3049 continue;
3050 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3051 vha = cmd->vha;
3052 qlt_abort_cmd_on_host_reset(vha, cmd);
3053 }
3054 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3055 }
3056
3057
3058 /*
3059 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3060 */
3061 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3062 uint32_t status, void *ctio)
3063 {
3064 struct qla_hw_data *ha = vha->hw;
3065 struct se_cmd *se_cmd;
3066 const struct target_core_fabric_ops *tfo;
3067 struct qla_tgt_cmd *cmd;
3068
3069 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3070 /* That could happen only in case of an error/reset/abort */
3071 if (status != CTIO_SUCCESS) {
3072 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3073 "Intermediate CTIO received"
3074 " (status %x)\n", status);
3075 }
3076 return;
3077 }
3078
3079 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3080 if (cmd == NULL)
3081 return;
3082
3083 se_cmd = &cmd->se_cmd;
3084 tfo = se_cmd->se_tfo;
3085 cmd->cmd_sent_to_fw = 0;
3086
3087 qlt_unmap_sg(vha, cmd);
3088
3089 if (unlikely(status != CTIO_SUCCESS)) {
3090 switch (status & 0xFFFF) {
3091 case CTIO_LIP_RESET:
3092 case CTIO_TARGET_RESET:
3093 case CTIO_ABORTED:
3094 /* driver request abort via Terminate exchange */
3095 case CTIO_TIMEOUT:
3096 case CTIO_INVALID_RX_ID:
3097 /* They are OK */
3098 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3099 "qla_target(%d): CTIO with "
3100 "status %#x received, state %x, se_cmd %p, "
3101 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3102 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3103 status, cmd->state, se_cmd);
3104 break;
3105
3106 case CTIO_PORT_LOGGED_OUT:
3107 case CTIO_PORT_UNAVAILABLE:
3108 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3109 "qla_target(%d): CTIO with PORT LOGGED "
3110 "OUT (29) or PORT UNAVAILABLE (28) status %x "
3111 "received (state %x, se_cmd %p)\n", vha->vp_idx,
3112 status, cmd->state, se_cmd);
3113 break;
3114
3115 case CTIO_SRR_RECEIVED:
3116 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3117 "qla_target(%d): CTIO with SRR_RECEIVED"
3118 " status %x received (state %x, se_cmd %p)\n",
3119 vha->vp_idx, status, cmd->state, se_cmd);
3120 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3121 break;
3122 else
3123 return;
3124
3125 case CTIO_DIF_ERROR: {
3126 struct ctio_crc_from_fw *crc =
3127 (struct ctio_crc_from_fw *)ctio;
3128 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3129 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3130 vha->vp_idx, status, cmd->state, se_cmd,
3131 *((u64 *)&crc->actual_dif[0]),
3132 *((u64 *)&crc->expected_dif[0]));
3133
3134 if (qlt_handle_dif_error(vha, cmd, ctio)) {
3135 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3136 /* scsi Write/xfer rdy complete */
3137 goto skip_term;
3138 } else {
3139 /* scsi read/xmit respond complete
3140 * call handle dif to send scsi status
3141 * rather than terminate exchange.
3142 */
3143 cmd->state = QLA_TGT_STATE_PROCESSED;
3144 ha->tgt.tgt_ops->handle_dif_err(cmd);
3145 return;
3146 }
3147 } else {
3148 /* Need to generate a SCSI good completion.
3149 * because FW did not send scsi status.
3150 */
3151 status = 0;
3152 goto skip_term;
3153 }
3154 break;
3155 }
3156 default:
3157 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3158 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3159 vha->vp_idx, status, cmd->state, se_cmd);
3160 break;
3161 }
3162
3163
3164 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3165 * cmd is already aborted/terminated, we don't
3166 * need to terminate again. The exchange is already
3167 * cleaned up/freed at FW level. Just cleanup at driver
3168 * level.
3169 */
3170 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3171 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3172 cmd->cmd_flags |= BIT_13;
3173 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3174 return;
3175 }
3176 }
3177 skip_term:
3178
3179 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3180 ;
3181 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3182 int rx_status = 0;
3183
3184 cmd->state = QLA_TGT_STATE_DATA_IN;
3185
3186 if (unlikely(status != CTIO_SUCCESS))
3187 rx_status = -EIO;
3188 else
3189 cmd->write_data_transferred = 1;
3190
3191 ha->tgt.tgt_ops->handle_data(cmd);
3192 return;
3193 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3194 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3195 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3196 } else {
3197 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3198 "qla_target(%d): A command in state (%d) should "
3199 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3200 }
3201
3202 if (unlikely(status != CTIO_SUCCESS) &&
3203 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3204 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3205 dump_stack();
3206 }
3207
3208
3209 ha->tgt.tgt_ops->free_cmd(cmd);
3210 }
3211
3212 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3213 uint8_t task_codes)
3214 {
3215 int fcp_task_attr;
3216
3217 switch (task_codes) {
3218 case ATIO_SIMPLE_QUEUE:
3219 fcp_task_attr = TCM_SIMPLE_TAG;
3220 break;
3221 case ATIO_HEAD_OF_QUEUE:
3222 fcp_task_attr = TCM_HEAD_TAG;
3223 break;
3224 case ATIO_ORDERED_QUEUE:
3225 fcp_task_attr = TCM_ORDERED_TAG;
3226 break;
3227 case ATIO_ACA_QUEUE:
3228 fcp_task_attr = TCM_ACA_TAG;
3229 break;
3230 case ATIO_UNTAGGED:
3231 fcp_task_attr = TCM_SIMPLE_TAG;
3232 break;
3233 default:
3234 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3235 "qla_target: unknown task code %x, use ORDERED instead\n",
3236 task_codes);
3237 fcp_task_attr = TCM_ORDERED_TAG;
3238 break;
3239 }
3240
3241 return fcp_task_attr;
3242 }
3243
3244 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3245 uint8_t *);
3246 /*
3247 * Process context for I/O path into tcm_qla2xxx code
3248 */
3249 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3250 {
3251 scsi_qla_host_t *vha = cmd->vha;
3252 struct qla_hw_data *ha = vha->hw;
3253 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3254 struct qla_tgt_sess *sess = cmd->sess;
3255 struct atio_from_isp *atio = &cmd->atio;
3256 unsigned char *cdb;
3257 unsigned long flags;
3258 uint32_t data_length;
3259 int ret, fcp_task_attr, data_dir, bidi = 0;
3260
3261 cmd->cmd_in_wq = 0;
3262 cmd->cmd_flags |= BIT_1;
3263 if (tgt->tgt_stop)
3264 goto out_term;
3265
3266 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3267 cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3268 cmd->unpacked_lun = scsilun_to_int(
3269 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3270
3271 if (atio->u.isp24.fcp_cmnd.rddata &&
3272 atio->u.isp24.fcp_cmnd.wrdata) {
3273 bidi = 1;
3274 data_dir = DMA_TO_DEVICE;
3275 } else if (atio->u.isp24.fcp_cmnd.rddata)
3276 data_dir = DMA_FROM_DEVICE;
3277 else if (atio->u.isp24.fcp_cmnd.wrdata)
3278 data_dir = DMA_TO_DEVICE;
3279 else
3280 data_dir = DMA_NONE;
3281
3282 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3283 atio->u.isp24.fcp_cmnd.task_attr);
3284 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3285 &atio->u.isp24.fcp_cmnd.add_cdb[
3286 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3287
3288 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3289 fcp_task_attr, data_dir, bidi);
3290 if (ret != 0)
3291 goto out_term;
3292 /*
3293 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3294 */
3295 spin_lock_irqsave(&ha->hardware_lock, flags);
3296 ha->tgt.tgt_ops->put_sess(sess);
3297 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3298 return;
3299
3300 out_term:
3301 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3302 /*
3303 * cmd has not sent to target yet, so pass NULL as the second
3304 * argument to qlt_send_term_exchange() and free the memory here.
3305 */
3306 cmd->cmd_flags |= BIT_2;
3307 spin_lock_irqsave(&ha->hardware_lock, flags);
3308 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3309
3310 qlt_decr_num_pend_cmds(vha);
3311 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3312 ha->tgt.tgt_ops->put_sess(sess);
3313 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3314 }
3315
3316 static void qlt_do_work(struct work_struct *work)
3317 {
3318 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3319
3320 __qlt_do_work(cmd);
3321 }
3322
3323 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3324 struct qla_tgt_sess *sess,
3325 struct atio_from_isp *atio)
3326 {
3327 struct se_session *se_sess = sess->se_sess;
3328 struct qla_tgt_cmd *cmd;
3329 int tag;
3330
3331 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3332 if (tag < 0)
3333 return NULL;
3334
3335 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3336 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3337
3338 memcpy(&cmd->atio, atio, sizeof(*atio));
3339 cmd->state = QLA_TGT_STATE_NEW;
3340 cmd->tgt = vha->vha_tgt.qla_tgt;
3341 qlt_incr_num_pend_cmds(vha);
3342 cmd->vha = vha;
3343 cmd->se_cmd.map_tag = tag;
3344 cmd->sess = sess;
3345 cmd->loop_id = sess->loop_id;
3346 cmd->conf_compl_supported = sess->conf_compl_supported;
3347
3348 return cmd;
3349 }
3350
3351 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3352 uint16_t);
3353
3354 static void qlt_create_sess_from_atio(struct work_struct *work)
3355 {
3356 struct qla_tgt_sess_op *op = container_of(work,
3357 struct qla_tgt_sess_op, work);
3358 scsi_qla_host_t *vha = op->vha;
3359 struct qla_hw_data *ha = vha->hw;
3360 struct qla_tgt_sess *sess;
3361 struct qla_tgt_cmd *cmd;
3362 unsigned long flags;
3363 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3364
3365 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3366 "qla_target(%d): Unable to find wwn login"
3367 " (s_id %x:%x:%x), trying to create it manually\n",
3368 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3369
3370 if (op->atio.u.raw.entry_count > 1) {
3371 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3372 "Dropping multy entry atio %p\n", &op->atio);
3373 goto out_term;
3374 }
3375
3376 mutex_lock(&vha->vha_tgt.tgt_mutex);
3377 sess = qlt_make_local_sess(vha, s_id);
3378 /* sess has an extra creation ref. */
3379 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3380
3381 if (!sess)
3382 goto out_term;
3383 /*
3384 * Now obtain a pre-allocated session tag using the original op->atio
3385 * packet header, and dispatch into __qlt_do_work() using the existing
3386 * process context.
3387 */
3388 cmd = qlt_get_tag(vha, sess, &op->atio);
3389 if (!cmd) {
3390 spin_lock_irqsave(&ha->hardware_lock, flags);
3391 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3392 ha->tgt.tgt_ops->put_sess(sess);
3393 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3394 kfree(op);
3395 return;
3396 }
3397 /*
3398 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3399 * the extra reference taken above by qlt_make_local_sess()
3400 */
3401 __qlt_do_work(cmd);
3402 kfree(op);
3403 return;
3404
3405 out_term:
3406 spin_lock_irqsave(&ha->hardware_lock, flags);
3407 qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3408 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3409 kfree(op);
3410
3411 }
3412
3413 /* ha->hardware_lock supposed to be held on entry */
3414 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3415 struct atio_from_isp *atio)
3416 {
3417 struct qla_hw_data *ha = vha->hw;
3418 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3419 struct qla_tgt_sess *sess;
3420 struct qla_tgt_cmd *cmd;
3421
3422 if (unlikely(tgt->tgt_stop)) {
3423 ql_dbg(ql_dbg_io, vha, 0x3061,
3424 "New command while device %p is shutting down\n", tgt);
3425 return -EFAULT;
3426 }
3427
3428 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3429 if (unlikely(!sess)) {
3430 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3431 GFP_ATOMIC);
3432 if (!op)
3433 return -ENOMEM;
3434
3435 memcpy(&op->atio, atio, sizeof(*atio));
3436 op->vha = vha;
3437 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3438 queue_work(qla_tgt_wq, &op->work);
3439 return 0;
3440 }
3441 /*
3442 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3443 */
3444 kref_get(&sess->se_sess->sess_kref);
3445
3446 cmd = qlt_get_tag(vha, sess, atio);
3447 if (!cmd) {
3448 ql_dbg(ql_dbg_io, vha, 0x3062,
3449 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3450 ha->tgt.tgt_ops->put_sess(sess);
3451 return -ENOMEM;
3452 }
3453
3454 cmd->cmd_flags = 0;
3455 cmd->jiffies_at_alloc = get_jiffies_64();
3456
3457 cmd->reset_count = vha->hw->chip_reset;
3458
3459 cmd->cmd_in_wq = 1;
3460 cmd->cmd_flags |= BIT_0;
3461 INIT_WORK(&cmd->work, qlt_do_work);
3462 queue_work(qla_tgt_wq, &cmd->work);
3463 return 0;
3464
3465 }
3466
3467 /* ha->hardware_lock supposed to be held on entry */
3468 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3469 int fn, void *iocb, int flags)
3470 {
3471 struct scsi_qla_host *vha = sess->vha;
3472 struct qla_hw_data *ha = vha->hw;
3473 struct qla_tgt_mgmt_cmd *mcmd;
3474 int res;
3475 uint8_t tmr_func;
3476
3477 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3478 if (!mcmd) {
3479 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3480 "qla_target(%d): Allocation of management "
3481 "command failed, some commands and their data could "
3482 "leak\n", vha->vp_idx);
3483 return -ENOMEM;
3484 }
3485 memset(mcmd, 0, sizeof(*mcmd));
3486 mcmd->sess = sess;
3487
3488 if (iocb) {
3489 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3490 sizeof(mcmd->orig_iocb.imm_ntfy));
3491 }
3492 mcmd->tmr_func = fn;
3493 mcmd->flags = flags;
3494 mcmd->reset_count = vha->hw->chip_reset;
3495
3496 switch (fn) {
3497 case QLA_TGT_CLEAR_ACA:
3498 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3499 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3500 tmr_func = TMR_CLEAR_ACA;
3501 break;
3502
3503 case QLA_TGT_TARGET_RESET:
3504 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3505 "qla_target(%d): TARGET_RESET received\n",
3506 sess->vha->vp_idx);
3507 tmr_func = TMR_TARGET_WARM_RESET;
3508 break;
3509
3510 case QLA_TGT_LUN_RESET:
3511 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3512 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3513 tmr_func = TMR_LUN_RESET;
3514 break;
3515
3516 case QLA_TGT_CLEAR_TS:
3517 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3518 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3519 tmr_func = TMR_CLEAR_TASK_SET;
3520 break;
3521
3522 case QLA_TGT_ABORT_TS:
3523 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3524 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3525 tmr_func = TMR_ABORT_TASK_SET;
3526 break;
3527 #if 0
3528 case QLA_TGT_ABORT_ALL:
3529 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3530 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3531 sess->vha->vp_idx);
3532 tmr_func = 0;
3533 break;
3534
3535 case QLA_TGT_ABORT_ALL_SESS:
3536 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3537 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3538 sess->vha->vp_idx);
3539 tmr_func = 0;
3540 break;
3541
3542 case QLA_TGT_NEXUS_LOSS_SESS:
3543 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3544 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3545 sess->vha->vp_idx);
3546 tmr_func = 0;
3547 break;
3548
3549 case QLA_TGT_NEXUS_LOSS:
3550 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3551 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3552 tmr_func = 0;
3553 break;
3554 #endif
3555 default:
3556 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3557 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3558 sess->vha->vp_idx, fn);
3559 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3560 return -ENOSYS;
3561 }
3562
3563 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3564 if (res != 0) {
3565 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3566 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3567 sess->vha->vp_idx, res);
3568 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3569 return -EFAULT;
3570 }
3571
3572 return 0;
3573 }
3574
3575 /* ha->hardware_lock supposed to be held on entry */
3576 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3577 {
3578 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3579 struct qla_hw_data *ha = vha->hw;
3580 struct qla_tgt *tgt;
3581 struct qla_tgt_sess *sess;
3582 uint32_t lun, unpacked_lun;
3583 int lun_size, fn;
3584
3585 tgt = vha->vha_tgt.qla_tgt;
3586
3587 lun = a->u.isp24.fcp_cmnd.lun;
3588 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3589 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3590 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3591 a->u.isp24.fcp_hdr.s_id);
3592 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3593
3594 if (!sess) {
3595 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3596 "qla_target(%d): task mgmt fn 0x%x for "
3597 "non-existant session\n", vha->vp_idx, fn);
3598 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3599 sizeof(struct atio_from_isp));
3600 }
3601
3602 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3603 }
3604
3605 /* ha->hardware_lock supposed to be held on entry */
3606 static int __qlt_abort_task(struct scsi_qla_host *vha,
3607 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3608 {
3609 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3610 struct qla_hw_data *ha = vha->hw;
3611 struct qla_tgt_mgmt_cmd *mcmd;
3612 uint32_t lun, unpacked_lun;
3613 int rc;
3614
3615 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3616 if (mcmd == NULL) {
3617 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3618 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3619 vha->vp_idx, __func__);
3620 return -ENOMEM;
3621 }
3622 memset(mcmd, 0, sizeof(*mcmd));
3623
3624 mcmd->sess = sess;
3625 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3626 sizeof(mcmd->orig_iocb.imm_ntfy));
3627
3628 lun = a->u.isp24.fcp_cmnd.lun;
3629 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3630 mcmd->reset_count = vha->hw->chip_reset;
3631
3632 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3633 le16_to_cpu(iocb->u.isp2x.seq_id));
3634 if (rc != 0) {
3635 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3636 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3637 vha->vp_idx, rc);
3638 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3639 return -EFAULT;
3640 }
3641
3642 return 0;
3643 }
3644
3645 /* ha->hardware_lock supposed to be held on entry */
3646 static int qlt_abort_task(struct scsi_qla_host *vha,
3647 struct imm_ntfy_from_isp *iocb)
3648 {
3649 struct qla_hw_data *ha = vha->hw;
3650 struct qla_tgt_sess *sess;
3651 int loop_id;
3652
3653 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3654
3655 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3656 if (sess == NULL) {
3657 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3658 "qla_target(%d): task abort for unexisting "
3659 "session\n", vha->vp_idx);
3660 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3661 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3662 }
3663
3664 return __qlt_abort_task(vha, iocb, sess);
3665 }
3666
3667 /*
3668 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3669 */
3670 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3671 struct imm_ntfy_from_isp *iocb)
3672 {
3673 int res = 0;
3674
3675 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3676 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3677 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3678
3679 switch (iocb->u.isp24.status_subcode) {
3680 case ELS_PLOGI:
3681 case ELS_FLOGI:
3682 case ELS_PRLI:
3683 case ELS_LOGO:
3684 case ELS_PRLO:
3685 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3686 break;
3687 case ELS_PDISC:
3688 case ELS_ADISC:
3689 {
3690 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3691 if (tgt->link_reinit_iocb_pending) {
3692 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3693 0, 0, 0, 0, 0, 0);
3694 tgt->link_reinit_iocb_pending = 0;
3695 }
3696 res = 1; /* send notify ack */
3697 break;
3698 }
3699
3700 default:
3701 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3702 "qla_target(%d): Unsupported ELS command %x "
3703 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3704 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3705 break;
3706 }
3707
3708 return res;
3709 }
3710
3711 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3712 {
3713 #if 1
3714 /*
3715 * FIXME: Reject non zero SRR relative offset until we can test
3716 * this code properly.
3717 */
3718 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3719 return -1;
3720 #else
3721 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3722 size_t first_offset = 0, rem_offset = offset, tmp = 0;
3723 int i, sg_srr_cnt, bufflen = 0;
3724
3725 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3726 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3727 "cmd->sg_cnt: %u, direction: %d\n",
3728 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3729
3730 if (!cmd->sg || !cmd->sg_cnt) {
3731 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3732 "Missing cmd->sg or zero cmd->sg_cnt in"
3733 " qla_tgt_set_data_offset\n");
3734 return -EINVAL;
3735 }
3736 /*
3737 * Walk the current cmd->sg list until we locate the new sg_srr_start
3738 */
3739 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3740 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3741 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3742 i, sg, sg_page(sg), sg->length, sg->offset);
3743
3744 if ((sg->length + tmp) > offset) {
3745 first_offset = rem_offset;
3746 sg_srr_start = sg;
3747 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3748 "Found matching sg[%d], using %p as sg_srr_start, "
3749 "and using first_offset: %zu\n", i, sg,
3750 first_offset);
3751 break;
3752 }
3753 tmp += sg->length;
3754 rem_offset -= sg->length;
3755 }
3756
3757 if (!sg_srr_start) {
3758 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3759 "Unable to locate sg_srr_start for offset: %u\n", offset);
3760 return -EINVAL;
3761 }
3762 sg_srr_cnt = (cmd->sg_cnt - i);
3763
3764 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3765 if (!sg_srr) {
3766 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3767 "Unable to allocate sgp\n");
3768 return -ENOMEM;
3769 }
3770 sg_init_table(sg_srr, sg_srr_cnt);
3771 sgp = &sg_srr[0];
3772 /*
3773 * Walk the remaining list for sg_srr_start, mapping to the newly
3774 * allocated sg_srr taking first_offset into account.
3775 */
3776 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3777 if (first_offset) {
3778 sg_set_page(sgp, sg_page(sg),
3779 (sg->length - first_offset), first_offset);
3780 first_offset = 0;
3781 } else {
3782 sg_set_page(sgp, sg_page(sg), sg->length, 0);
3783 }
3784 bufflen += sgp->length;
3785
3786 sgp = sg_next(sgp);
3787 if (!sgp)
3788 break;
3789 }
3790
3791 cmd->sg = sg_srr;
3792 cmd->sg_cnt = sg_srr_cnt;
3793 cmd->bufflen = bufflen;
3794 cmd->offset += offset;
3795 cmd->free_sg = 1;
3796
3797 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3798 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3799 cmd->sg_cnt);
3800 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3801 cmd->bufflen);
3802 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3803 cmd->offset);
3804
3805 if (cmd->sg_cnt < 0)
3806 BUG();
3807
3808 if (cmd->bufflen < 0)
3809 BUG();
3810
3811 return 0;
3812 #endif
3813 }
3814
3815 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3816 uint32_t srr_rel_offs, int *xmit_type)
3817 {
3818 int res = 0, rel_offs;
3819
3820 rel_offs = srr_rel_offs - cmd->offset;
3821 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3822 srr_rel_offs, rel_offs);
3823
3824 *xmit_type = QLA_TGT_XMIT_ALL;
3825
3826 if (rel_offs < 0) {
3827 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3828 "qla_target(%d): SRR rel_offs (%d) < 0",
3829 cmd->vha->vp_idx, rel_offs);
3830 res = -1;
3831 } else if (rel_offs == cmd->bufflen)
3832 *xmit_type = QLA_TGT_XMIT_STATUS;
3833 else if (rel_offs > 0)
3834 res = qlt_set_data_offset(cmd, rel_offs);
3835
3836 return res;
3837 }
3838
3839 /* No locks, thread context */
3840 static void qlt_handle_srr(struct scsi_qla_host *vha,
3841 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3842 {
3843 struct imm_ntfy_from_isp *ntfy =
3844 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3845 struct qla_hw_data *ha = vha->hw;
3846 struct qla_tgt_cmd *cmd = sctio->cmd;
3847 struct se_cmd *se_cmd = &cmd->se_cmd;
3848 unsigned long flags;
3849 int xmit_type = 0, resp = 0;
3850 uint32_t offset;
3851 uint16_t srr_ui;
3852
3853 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3854 srr_ui = ntfy->u.isp24.srr_ui;
3855
3856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3857 cmd, srr_ui);
3858
3859 switch (srr_ui) {
3860 case SRR_IU_STATUS:
3861 spin_lock_irqsave(&ha->hardware_lock, flags);
3862 qlt_send_notify_ack(vha, ntfy,
3863 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3864 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3865 xmit_type = QLA_TGT_XMIT_STATUS;
3866 resp = 1;
3867 break;
3868 case SRR_IU_DATA_IN:
3869 if (!cmd->sg || !cmd->sg_cnt) {
3870 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3871 "Unable to process SRR_IU_DATA_IN due to"
3872 " missing cmd->sg, state: %d\n", cmd->state);
3873 dump_stack();
3874 goto out_reject;
3875 }
3876 if (se_cmd->scsi_status != 0) {
3877 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3878 "Rejecting SRR_IU_DATA_IN with non GOOD "
3879 "scsi_status\n");
3880 goto out_reject;
3881 }
3882 cmd->bufflen = se_cmd->data_length;
3883
3884 if (qlt_has_data(cmd)) {
3885 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3886 goto out_reject;
3887 spin_lock_irqsave(&ha->hardware_lock, flags);
3888 qlt_send_notify_ack(vha, ntfy,
3889 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3890 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3891 resp = 1;
3892 } else {
3893 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3894 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
3895 vha->vp_idx, se_cmd->tag,
3896 cmd->se_cmd.scsi_status);
3897 goto out_reject;
3898 }
3899 break;
3900 case SRR_IU_DATA_OUT:
3901 if (!cmd->sg || !cmd->sg_cnt) {
3902 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3903 "Unable to process SRR_IU_DATA_OUT due to"
3904 " missing cmd->sg\n");
3905 dump_stack();
3906 goto out_reject;
3907 }
3908 if (se_cmd->scsi_status != 0) {
3909 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3910 "Rejecting SRR_IU_DATA_OUT"
3911 " with non GOOD scsi_status\n");
3912 goto out_reject;
3913 }
3914 cmd->bufflen = se_cmd->data_length;
3915
3916 if (qlt_has_data(cmd)) {
3917 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3918 goto out_reject;
3919 spin_lock_irqsave(&ha->hardware_lock, flags);
3920 qlt_send_notify_ack(vha, ntfy,
3921 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3922 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3923 if (xmit_type & QLA_TGT_XMIT_DATA) {
3924 cmd->cmd_flags |= BIT_8;
3925 qlt_rdy_to_xfer(cmd);
3926 }
3927 } else {
3928 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3929 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
3930 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
3931 goto out_reject;
3932 }
3933 break;
3934 default:
3935 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3936 "qla_target(%d): Unknown srr_ui value %x",
3937 vha->vp_idx, srr_ui);
3938 goto out_reject;
3939 }
3940
3941 /* Transmit response in case of status and data-in cases */
3942 if (resp) {
3943 cmd->cmd_flags |= BIT_7;
3944 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3945 }
3946
3947 return;
3948
3949 out_reject:
3950 spin_lock_irqsave(&ha->hardware_lock, flags);
3951 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3952 NOTIFY_ACK_SRR_FLAGS_REJECT,
3953 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3954 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3955 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3956 cmd->state = QLA_TGT_STATE_DATA_IN;
3957 dump_stack();
3958 } else {
3959 cmd->cmd_flags |= BIT_9;
3960 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3961 }
3962 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3963 }
3964
3965 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3966 struct qla_tgt_srr_imm *imm, int ha_locked)
3967 {
3968 struct qla_hw_data *ha = vha->hw;
3969 unsigned long flags = 0;
3970
3971 if (!ha_locked)
3972 spin_lock_irqsave(&ha->hardware_lock, flags);
3973
3974 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3975 NOTIFY_ACK_SRR_FLAGS_REJECT,
3976 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3977 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3978
3979 if (!ha_locked)
3980 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3981
3982 kfree(imm);
3983 }
3984
3985 static void qlt_handle_srr_work(struct work_struct *work)
3986 {
3987 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3988 struct scsi_qla_host *vha = tgt->vha;
3989 struct qla_tgt_srr_ctio *sctio;
3990 unsigned long flags;
3991
3992 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3993 tgt);
3994
3995 restart:
3996 spin_lock_irqsave(&tgt->srr_lock, flags);
3997 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3998 struct qla_tgt_srr_imm *imm, *i, *ti;
3999 struct qla_tgt_cmd *cmd;
4000 struct se_cmd *se_cmd;
4001
4002 imm = NULL;
4003 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4004 srr_list_entry) {
4005 if (i->srr_id == sctio->srr_id) {
4006 list_del(&i->srr_list_entry);
4007 if (imm) {
4008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4009 "qla_target(%d): There must be "
4010 "only one IMM SRR per CTIO SRR "
4011 "(IMM SRR %p, id %d, CTIO %p\n",
4012 vha->vp_idx, i, i->srr_id, sctio);
4013 qlt_reject_free_srr_imm(tgt->vha, i, 0);
4014 } else
4015 imm = i;
4016 }
4017 }
4018
4019 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4020 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4021 sctio->srr_id);
4022
4023 if (imm == NULL) {
4024 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4025 "Not found matching IMM for SRR CTIO (id %d)\n",
4026 sctio->srr_id);
4027 continue;
4028 } else
4029 list_del(&sctio->srr_list_entry);
4030
4031 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4032
4033 cmd = sctio->cmd;
4034 /*
4035 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4036 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4037 * logic..
4038 */
4039 cmd->offset = 0;
4040 if (cmd->free_sg) {
4041 kfree(cmd->sg);
4042 cmd->sg = NULL;
4043 cmd->free_sg = 0;
4044 }
4045 se_cmd = &cmd->se_cmd;
4046
4047 cmd->sg_cnt = se_cmd->t_data_nents;
4048 cmd->sg = se_cmd->t_data_sg;
4049
4050 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4051 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4052 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4053 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4054
4055 qlt_handle_srr(vha, sctio, imm);
4056
4057 kfree(imm);
4058 kfree(sctio);
4059 goto restart;
4060 }
4061 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4062 }
4063
4064 /* ha->hardware_lock supposed to be held on entry */
4065 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4066 struct imm_ntfy_from_isp *iocb)
4067 {
4068 struct qla_tgt_srr_imm *imm;
4069 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4070 struct qla_tgt_srr_ctio *sctio;
4071
4072 tgt->imm_srr_id++;
4073
4074 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4075 vha->vp_idx);
4076
4077 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4078 if (imm != NULL) {
4079 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4080
4081 /* IRQ is already OFF */
4082 spin_lock(&tgt->srr_lock);
4083 imm->srr_id = tgt->imm_srr_id;
4084 list_add_tail(&imm->srr_list_entry,
4085 &tgt->srr_imm_list);
4086 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4087 "IMM NTFY SRR %p added (id %d, ui %x)\n",
4088 imm, imm->srr_id, iocb->u.isp24.srr_ui);
4089 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4090 int found = 0;
4091 list_for_each_entry(sctio, &tgt->srr_ctio_list,
4092 srr_list_entry) {
4093 if (sctio->srr_id == imm->srr_id) {
4094 found = 1;
4095 break;
4096 }
4097 }
4098 if (found) {
4099 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4100 "Scheduling srr work\n");
4101 schedule_work(&tgt->srr_work);
4102 } else {
4103 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4104 "qla_target(%d): imm_srr_id "
4105 "== ctio_srr_id (%d), but there is no "
4106 "corresponding SRR CTIO, deleting IMM "
4107 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4108 imm);
4109 list_del(&imm->srr_list_entry);
4110
4111 kfree(imm);
4112
4113 spin_unlock(&tgt->srr_lock);
4114 goto out_reject;
4115 }
4116 }
4117 spin_unlock(&tgt->srr_lock);
4118 } else {
4119 struct qla_tgt_srr_ctio *ts;
4120
4121 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4122 "qla_target(%d): Unable to allocate SRR IMM "
4123 "entry, SRR request will be rejected\n", vha->vp_idx);
4124
4125 /* IRQ is already OFF */
4126 spin_lock(&tgt->srr_lock);
4127 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4128 srr_list_entry) {
4129 if (sctio->srr_id == tgt->imm_srr_id) {
4130 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4131 "CTIO SRR %p deleted (id %d)\n",
4132 sctio, sctio->srr_id);
4133 list_del(&sctio->srr_list_entry);
4134 qlt_send_term_exchange(vha, sctio->cmd,
4135 &sctio->cmd->atio, 1);
4136 kfree(sctio);
4137 }
4138 }
4139 spin_unlock(&tgt->srr_lock);
4140 goto out_reject;
4141 }
4142
4143 return;
4144
4145 out_reject:
4146 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4147 NOTIFY_ACK_SRR_FLAGS_REJECT,
4148 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4149 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4150 }
4151
4152 /*
4153 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4154 */
4155 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4156 struct imm_ntfy_from_isp *iocb)
4157 {
4158 struct qla_hw_data *ha = vha->hw;
4159 uint32_t add_flags = 0;
4160 int send_notify_ack = 1;
4161 uint16_t status;
4162
4163 status = le16_to_cpu(iocb->u.isp2x.status);
4164 switch (status) {
4165 case IMM_NTFY_LIP_RESET:
4166 {
4167 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4168 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4169 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4170 iocb->u.isp24.status_subcode);
4171
4172 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4173 send_notify_ack = 0;
4174 break;
4175 }
4176
4177 case IMM_NTFY_LIP_LINK_REINIT:
4178 {
4179 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4180 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4181 "qla_target(%d): LINK REINIT (loop %#x, "
4182 "subcode %x)\n", vha->vp_idx,
4183 le16_to_cpu(iocb->u.isp24.nport_handle),
4184 iocb->u.isp24.status_subcode);
4185 if (tgt->link_reinit_iocb_pending) {
4186 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4187 0, 0, 0, 0, 0, 0);
4188 }
4189 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4190 tgt->link_reinit_iocb_pending = 1;
4191 /*
4192 * QLogic requires to wait after LINK REINIT for possible
4193 * PDISC or ADISC ELS commands
4194 */
4195 send_notify_ack = 0;
4196 break;
4197 }
4198
4199 case IMM_NTFY_PORT_LOGOUT:
4200 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4201 "qla_target(%d): Port logout (loop "
4202 "%#x, subcode %x)\n", vha->vp_idx,
4203 le16_to_cpu(iocb->u.isp24.nport_handle),
4204 iocb->u.isp24.status_subcode);
4205
4206 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4207 send_notify_ack = 0;
4208 /* The sessions will be cleared in the callback, if needed */
4209 break;
4210
4211 case IMM_NTFY_GLBL_TPRLO:
4212 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4213 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4214 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4215 send_notify_ack = 0;
4216 /* The sessions will be cleared in the callback, if needed */
4217 break;
4218
4219 case IMM_NTFY_PORT_CONFIG:
4220 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4221 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4222 status);
4223 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4224 send_notify_ack = 0;
4225 /* The sessions will be cleared in the callback, if needed */
4226 break;
4227
4228 case IMM_NTFY_GLBL_LOGO:
4229 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4230 "qla_target(%d): Link failure detected\n",
4231 vha->vp_idx);
4232 /* I_T nexus loss */
4233 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4234 send_notify_ack = 0;
4235 break;
4236
4237 case IMM_NTFY_IOCB_OVERFLOW:
4238 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4239 "qla_target(%d): Cannot provide requested "
4240 "capability (IOCB overflowed the immediate notify "
4241 "resource count)\n", vha->vp_idx);
4242 break;
4243
4244 case IMM_NTFY_ABORT_TASK:
4245 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4246 "qla_target(%d): Abort Task (S %08x I %#x -> "
4247 "L %#x)\n", vha->vp_idx,
4248 le16_to_cpu(iocb->u.isp2x.seq_id),
4249 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4250 le16_to_cpu(iocb->u.isp2x.lun));
4251 if (qlt_abort_task(vha, iocb) == 0)
4252 send_notify_ack = 0;
4253 break;
4254
4255 case IMM_NTFY_RESOURCE:
4256 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4257 "qla_target(%d): Out of resources, host %ld\n",
4258 vha->vp_idx, vha->host_no);
4259 break;
4260
4261 case IMM_NTFY_MSG_RX:
4262 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4263 "qla_target(%d): Immediate notify task %x\n",
4264 vha->vp_idx, iocb->u.isp2x.task_flags);
4265 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4266 send_notify_ack = 0;
4267 break;
4268
4269 case IMM_NTFY_ELS:
4270 if (qlt_24xx_handle_els(vha, iocb) == 0)
4271 send_notify_ack = 0;
4272 break;
4273
4274 case IMM_NTFY_SRR:
4275 qlt_prepare_srr_imm(vha, iocb);
4276 send_notify_ack = 0;
4277 break;
4278
4279 default:
4280 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4281 "qla_target(%d): Received unknown immediate "
4282 "notify status %x\n", vha->vp_idx, status);
4283 break;
4284 }
4285
4286 if (send_notify_ack)
4287 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4288 }
4289
4290 /*
4291 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4292 * This function sends busy to ISP 2xxx or 24xx.
4293 */
4294 static int __qlt_send_busy(struct scsi_qla_host *vha,
4295 struct atio_from_isp *atio, uint16_t status)
4296 {
4297 struct ctio7_to_24xx *ctio24;
4298 struct qla_hw_data *ha = vha->hw;
4299 request_t *pkt;
4300 struct qla_tgt_sess *sess = NULL;
4301
4302 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4303 atio->u.isp24.fcp_hdr.s_id);
4304 if (!sess) {
4305 qlt_send_term_exchange(vha, NULL, atio, 1);
4306 return 0;
4307 }
4308 /* Sending marker isn't necessary, since we called from ISR */
4309
4310 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4311 if (!pkt) {
4312 ql_dbg(ql_dbg_io, vha, 0x3063,
4313 "qla_target(%d): %s failed: unable to allocate "
4314 "request packet", vha->vp_idx, __func__);
4315 return -ENOMEM;
4316 }
4317
4318 pkt->entry_count = 1;
4319 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4320
4321 ctio24 = (struct ctio7_to_24xx *)pkt;
4322 ctio24->entry_type = CTIO_TYPE7;
4323 ctio24->nport_handle = sess->loop_id;
4324 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4325 ctio24->vp_index = vha->vp_idx;
4326 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4327 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4328 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4329 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4330 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4331 __constant_cpu_to_le16(
4332 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4333 CTIO7_FLAGS_DONT_RET_CTIO);
4334 /*
4335 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4336 * if the explicit conformation is used.
4337 */
4338 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4339 ctio24->u.status1.scsi_status = cpu_to_le16(status);
4340 /* Memory Barrier */
4341 wmb();
4342 qla2x00_start_iocbs(vha, vha->req);
4343 return 0;
4344 }
4345
4346 /*
4347 * This routine is used to allocate a command for either a QFull condition
4348 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4349 * out previously.
4350 */
4351 static void
4352 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4353 struct atio_from_isp *atio, uint16_t status, int qfull)
4354 {
4355 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4356 struct qla_hw_data *ha = vha->hw;
4357 struct qla_tgt_sess *sess;
4358 struct se_session *se_sess;
4359 struct qla_tgt_cmd *cmd;
4360 int tag;
4361
4362 if (unlikely(tgt->tgt_stop)) {
4363 ql_dbg(ql_dbg_io, vha, 0x300a,
4364 "New command while device %p is shutting down\n", tgt);
4365 return;
4366 }
4367
4368 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4369 vha->hw->tgt.num_qfull_cmds_dropped++;
4370 if (vha->hw->tgt.num_qfull_cmds_dropped >
4371 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4372 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4373 vha->hw->tgt.num_qfull_cmds_dropped;
4374
4375 ql_dbg(ql_dbg_io, vha, 0x3068,
4376 "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4377 vha->vp_idx, __func__,
4378 vha->hw->tgt.num_qfull_cmds_dropped);
4379
4380 qlt_chk_exch_leak_thresh_hold(vha);
4381 return;
4382 }
4383
4384 sess = ha->tgt.tgt_ops->find_sess_by_s_id
4385 (vha, atio->u.isp24.fcp_hdr.s_id);
4386 if (!sess)
4387 return;
4388
4389 se_sess = sess->se_sess;
4390
4391 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4392 if (tag < 0)
4393 return;
4394
4395 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4396 if (!cmd) {
4397 ql_dbg(ql_dbg_io, vha, 0x3009,
4398 "qla_target(%d): %s: Allocation of cmd failed\n",
4399 vha->vp_idx, __func__);
4400
4401 vha->hw->tgt.num_qfull_cmds_dropped++;
4402 if (vha->hw->tgt.num_qfull_cmds_dropped >
4403 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4404 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4405 vha->hw->tgt.num_qfull_cmds_dropped;
4406
4407 qlt_chk_exch_leak_thresh_hold(vha);
4408 return;
4409 }
4410
4411 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4412
4413 qlt_incr_num_pend_cmds(vha);
4414 INIT_LIST_HEAD(&cmd->cmd_list);
4415 memcpy(&cmd->atio, atio, sizeof(*atio));
4416
4417 cmd->tgt = vha->vha_tgt.qla_tgt;
4418 cmd->vha = vha;
4419 cmd->reset_count = vha->hw->chip_reset;
4420 cmd->q_full = 1;
4421
4422 if (qfull) {
4423 cmd->q_full = 1;
4424 /* NOTE: borrowing the state field to carry the status */
4425 cmd->state = status;
4426 } else
4427 cmd->term_exchg = 1;
4428
4429 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4430
4431 vha->hw->tgt.num_qfull_cmds_alloc++;
4432 if (vha->hw->tgt.num_qfull_cmds_alloc >
4433 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4434 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4435 vha->hw->tgt.num_qfull_cmds_alloc;
4436 }
4437
4438 int
4439 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4440 {
4441 struct qla_hw_data *ha = vha->hw;
4442 unsigned long flags;
4443 struct qla_tgt_cmd *cmd, *tcmd;
4444 struct list_head free_list;
4445 int rc = 0;
4446
4447 if (list_empty(&ha->tgt.q_full_list))
4448 return 0;
4449
4450 INIT_LIST_HEAD(&free_list);
4451
4452 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4453
4454 if (list_empty(&ha->tgt.q_full_list)) {
4455 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4456 return 0;
4457 }
4458
4459 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4460 if (cmd->q_full)
4461 /* cmd->state is a borrowed field to hold status */
4462 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4463 else if (cmd->term_exchg)
4464 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4465
4466 if (rc == -ENOMEM)
4467 break;
4468
4469 if (cmd->q_full)
4470 ql_dbg(ql_dbg_io, vha, 0x3006,
4471 "%s: busy sent for ox_id[%04x]\n", __func__,
4472 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4473 else if (cmd->term_exchg)
4474 ql_dbg(ql_dbg_io, vha, 0x3007,
4475 "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4476 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4477 else
4478 ql_dbg(ql_dbg_io, vha, 0x3008,
4479 "%s: Unexpected cmd in QFull list %p\n", __func__,
4480 cmd);
4481
4482 list_del(&cmd->cmd_list);
4483 list_add_tail(&cmd->cmd_list, &free_list);
4484
4485 /* piggy back on hardware_lock for protection */
4486 vha->hw->tgt.num_qfull_cmds_alloc--;
4487 }
4488 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4489
4490 cmd = NULL;
4491
4492 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4493 list_del(&cmd->cmd_list);
4494 /* This cmd was never sent to TCM. There is no need
4495 * to schedule free or call free_cmd
4496 */
4497 qlt_free_cmd(cmd);
4498 }
4499 return rc;
4500 }
4501
4502 static void
4503 qlt_send_busy(struct scsi_qla_host *vha,
4504 struct atio_from_isp *atio, uint16_t status)
4505 {
4506 int rc = 0;
4507
4508 rc = __qlt_send_busy(vha, atio, status);
4509 if (rc == -ENOMEM)
4510 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4511 }
4512
4513 static int
4514 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4515 struct atio_from_isp *atio)
4516 {
4517 struct qla_hw_data *ha = vha->hw;
4518 uint16_t status;
4519
4520 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4521 return 0;
4522
4523 status = temp_sam_status;
4524 qlt_send_busy(vha, atio, status);
4525 return 1;
4526 }
4527
4528 /* ha->hardware_lock supposed to be held on entry */
4529 /* called via callback from qla2xxx */
4530 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4531 struct atio_from_isp *atio)
4532 {
4533 struct qla_hw_data *ha = vha->hw;
4534 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4535 int rc;
4536
4537 if (unlikely(tgt == NULL)) {
4538 ql_dbg(ql_dbg_io, vha, 0x3064,
4539 "ATIO pkt, but no tgt (ha %p)", ha);
4540 return;
4541 }
4542 /*
4543 * In tgt_stop mode we also should allow all requests to pass.
4544 * Otherwise, some commands can stuck.
4545 */
4546
4547 tgt->irq_cmd_count++;
4548
4549 switch (atio->u.raw.entry_type) {
4550 case ATIO_TYPE7:
4551 if (unlikely(atio->u.isp24.exchange_addr ==
4552 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4553 ql_dbg(ql_dbg_io, vha, 0x3065,
4554 "qla_target(%d): ATIO_TYPE7 "
4555 "received with UNKNOWN exchange address, "
4556 "sending QUEUE_FULL\n", vha->vp_idx);
4557 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4558 break;
4559 }
4560
4561
4562
4563 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4564 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4565 if (rc != 0) {
4566 tgt->irq_cmd_count--;
4567 return;
4568 }
4569 rc = qlt_handle_cmd_for_atio(vha, atio);
4570 } else {
4571 rc = qlt_handle_task_mgmt(vha, atio);
4572 }
4573 if (unlikely(rc != 0)) {
4574 if (rc == -ESRCH) {
4575 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4576 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4577 #else
4578 qlt_send_term_exchange(vha, NULL, atio, 1);
4579 #endif
4580 } else {
4581 if (tgt->tgt_stop) {
4582 ql_dbg(ql_dbg_tgt, vha, 0xe059,
4583 "qla_target: Unable to send "
4584 "command to target for req, "
4585 "ignoring.\n");
4586 } else {
4587 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4588 "qla_target(%d): Unable to send "
4589 "command to target, sending BUSY "
4590 "status.\n", vha->vp_idx);
4591 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4592 }
4593 }
4594 }
4595 break;
4596
4597 case IMMED_NOTIFY_TYPE:
4598 {
4599 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4600 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4601 "qla_target(%d): Received ATIO packet %x "
4602 "with error status %x\n", vha->vp_idx,
4603 atio->u.raw.entry_type,
4604 atio->u.isp2x.entry_status);
4605 break;
4606 }
4607 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4608 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4609 break;
4610 }
4611
4612 default:
4613 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4614 "qla_target(%d): Received unknown ATIO atio "
4615 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4616 break;
4617 }
4618
4619 tgt->irq_cmd_count--;
4620 }
4621
4622 /* ha->hardware_lock supposed to be held on entry */
4623 /* called via callback from qla2xxx */
4624 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4625 {
4626 struct qla_hw_data *ha = vha->hw;
4627 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4628
4629 if (unlikely(tgt == NULL)) {
4630 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4631 "qla_target(%d): Response pkt %x received, but no "
4632 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4633 return;
4634 }
4635
4636 /*
4637 * In tgt_stop mode we also should allow all requests to pass.
4638 * Otherwise, some commands can stuck.
4639 */
4640
4641 tgt->irq_cmd_count++;
4642
4643 switch (pkt->entry_type) {
4644 case CTIO_CRC2:
4645 case CTIO_TYPE7:
4646 {
4647 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4648 qlt_do_ctio_completion(vha, entry->handle,
4649 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4650 entry);
4651 break;
4652 }
4653
4654 case ACCEPT_TGT_IO_TYPE:
4655 {
4656 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4657 int rc;
4658 if (atio->u.isp2x.status !=
4659 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4660 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4661 "qla_target(%d): ATIO with error "
4662 "status %x received\n", vha->vp_idx,
4663 le16_to_cpu(atio->u.isp2x.status));
4664 break;
4665 }
4666
4667 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4668 if (rc != 0) {
4669 tgt->irq_cmd_count--;
4670 return;
4671 }
4672
4673 rc = qlt_handle_cmd_for_atio(vha, atio);
4674 if (unlikely(rc != 0)) {
4675 if (rc == -ESRCH) {
4676 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4677 qlt_send_busy(vha, atio, 0);
4678 #else
4679 qlt_send_term_exchange(vha, NULL, atio, 1);
4680 #endif
4681 } else {
4682 if (tgt->tgt_stop) {
4683 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4684 "qla_target: Unable to send "
4685 "command to target, sending TERM "
4686 "EXCHANGE for rsp\n");
4687 qlt_send_term_exchange(vha, NULL,
4688 atio, 1);
4689 } else {
4690 ql_dbg(ql_dbg_tgt, vha, 0xe060,
4691 "qla_target(%d): Unable to send "
4692 "command to target, sending BUSY "
4693 "status\n", vha->vp_idx);
4694 qlt_send_busy(vha, atio, 0);
4695 }
4696 }
4697 }
4698 }
4699 break;
4700
4701 case CONTINUE_TGT_IO_TYPE:
4702 {
4703 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4704 qlt_do_ctio_completion(vha, entry->handle,
4705 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4706 entry);
4707 break;
4708 }
4709
4710 case CTIO_A64_TYPE:
4711 {
4712 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4713 qlt_do_ctio_completion(vha, entry->handle,
4714 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4715 entry);
4716 break;
4717 }
4718
4719 case IMMED_NOTIFY_TYPE:
4720 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4721 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4722 break;
4723
4724 case NOTIFY_ACK_TYPE:
4725 if (tgt->notify_ack_expected > 0) {
4726 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4727 ql_dbg(ql_dbg_tgt, vha, 0xe036,
4728 "NOTIFY_ACK seq %08x status %x\n",
4729 le16_to_cpu(entry->u.isp2x.seq_id),
4730 le16_to_cpu(entry->u.isp2x.status));
4731 tgt->notify_ack_expected--;
4732 if (entry->u.isp2x.status !=
4733 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4734 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4735 "qla_target(%d): NOTIFY_ACK "
4736 "failed %x\n", vha->vp_idx,
4737 le16_to_cpu(entry->u.isp2x.status));
4738 }
4739 } else {
4740 ql_dbg(ql_dbg_tgt, vha, 0xe062,
4741 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4742 vha->vp_idx);
4743 }
4744 break;
4745
4746 case ABTS_RECV_24XX:
4747 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4748 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4749 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4750 break;
4751
4752 case ABTS_RESP_24XX:
4753 if (tgt->abts_resp_expected > 0) {
4754 struct abts_resp_from_24xx_fw *entry =
4755 (struct abts_resp_from_24xx_fw *)pkt;
4756 ql_dbg(ql_dbg_tgt, vha, 0xe038,
4757 "ABTS_RESP_24XX: compl_status %x\n",
4758 entry->compl_status);
4759 tgt->abts_resp_expected--;
4760 if (le16_to_cpu(entry->compl_status) !=
4761 ABTS_RESP_COMPL_SUCCESS) {
4762 if ((entry->error_subcode1 == 0x1E) &&
4763 (entry->error_subcode2 == 0)) {
4764 /*
4765 * We've got a race here: aborted
4766 * exchange not terminated, i.e.
4767 * response for the aborted command was
4768 * sent between the abort request was
4769 * received and processed.
4770 * Unfortunately, the firmware has a
4771 * silly requirement that all aborted
4772 * exchanges must be explicitely
4773 * terminated, otherwise it refuses to
4774 * send responses for the abort
4775 * requests. So, we have to
4776 * (re)terminate the exchange and retry
4777 * the abort response.
4778 */
4779 qlt_24xx_retry_term_exchange(vha,
4780 entry);
4781 } else
4782 ql_dbg(ql_dbg_tgt, vha, 0xe063,
4783 "qla_target(%d): ABTS_RESP_24XX "
4784 "failed %x (subcode %x:%x)",
4785 vha->vp_idx, entry->compl_status,
4786 entry->error_subcode1,
4787 entry->error_subcode2);
4788 }
4789 } else {
4790 ql_dbg(ql_dbg_tgt, vha, 0xe064,
4791 "qla_target(%d): Unexpected ABTS_RESP_24XX "
4792 "received\n", vha->vp_idx);
4793 }
4794 break;
4795
4796 default:
4797 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4798 "qla_target(%d): Received unknown response pkt "
4799 "type %x\n", vha->vp_idx, pkt->entry_type);
4800 break;
4801 }
4802
4803 tgt->irq_cmd_count--;
4804 }
4805
4806 /*
4807 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4808 */
4809 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4810 uint16_t *mailbox)
4811 {
4812 struct qla_hw_data *ha = vha->hw;
4813 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4814 int login_code;
4815
4816 if (!ha->tgt.tgt_ops)
4817 return;
4818
4819 if (unlikely(tgt == NULL)) {
4820 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4821 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4822 return;
4823 }
4824
4825 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4826 IS_QLA2100(ha))
4827 return;
4828 /*
4829 * In tgt_stop mode we also should allow all requests to pass.
4830 * Otherwise, some commands can stuck.
4831 */
4832
4833 tgt->irq_cmd_count++;
4834
4835 switch (code) {
4836 case MBA_RESET: /* Reset */
4837 case MBA_SYSTEM_ERR: /* System Error */
4838 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
4839 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
4840 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4841 "qla_target(%d): System error async event %#x "
4842 "occurred", vha->vp_idx, code);
4843 break;
4844 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
4845 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4846 break;
4847
4848 case MBA_LOOP_UP:
4849 {
4850 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4851 "qla_target(%d): Async LOOP_UP occurred "
4852 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4853 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4854 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4855 if (tgt->link_reinit_iocb_pending) {
4856 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4857 0, 0, 0, 0, 0, 0);
4858 tgt->link_reinit_iocb_pending = 0;
4859 }
4860 break;
4861 }
4862
4863 case MBA_LIP_OCCURRED:
4864 case MBA_LOOP_DOWN:
4865 case MBA_LIP_RESET:
4866 case MBA_RSCN_UPDATE:
4867 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4868 "qla_target(%d): Async event %#x occurred "
4869 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4870 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4871 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4872 break;
4873
4874 case MBA_PORT_UPDATE:
4875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4876 "qla_target(%d): Port update async event %#x "
4877 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4878 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4879 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4880 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4881
4882 login_code = le16_to_cpu(mailbox[2]);
4883 if (login_code == 0x4)
4884 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4885 "Async MB 2: Got PLOGI Complete\n");
4886 else if (login_code == 0x7)
4887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4888 "Async MB 2: Port Logged Out\n");
4889 break;
4890
4891 default:
4892 break;
4893 }
4894
4895 tgt->irq_cmd_count--;
4896 }
4897
4898 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4899 uint16_t loop_id)
4900 {
4901 fc_port_t *fcport;
4902 int rc;
4903
4904 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4905 if (!fcport) {
4906 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4907 "qla_target(%d): Allocation of tmp FC port failed",
4908 vha->vp_idx);
4909 return NULL;
4910 }
4911
4912 fcport->loop_id = loop_id;
4913
4914 rc = qla2x00_get_port_database(vha, fcport, 0);
4915 if (rc != QLA_SUCCESS) {
4916 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4917 "qla_target(%d): Failed to retrieve fcport "
4918 "information -- get_port_database() returned %x "
4919 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4920 kfree(fcport);
4921 return NULL;
4922 }
4923
4924 return fcport;
4925 }
4926
4927 /* Must be called under tgt_mutex */
4928 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4929 uint8_t *s_id)
4930 {
4931 struct qla_tgt_sess *sess = NULL;
4932 fc_port_t *fcport = NULL;
4933 int rc, global_resets;
4934 uint16_t loop_id = 0;
4935
4936 retry:
4937 global_resets =
4938 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4939
4940 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4941 if (rc != 0) {
4942 if ((s_id[0] == 0xFF) &&
4943 (s_id[1] == 0xFC)) {
4944 /*
4945 * This is Domain Controller, so it should be
4946 * OK to drop SCSI commands from it.
4947 */
4948 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4949 "Unable to find initiator with S_ID %x:%x:%x",
4950 s_id[0], s_id[1], s_id[2]);
4951 } else
4952 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4953 "qla_target(%d): Unable to find "
4954 "initiator with S_ID %x:%x:%x",
4955 vha->vp_idx, s_id[0], s_id[1],
4956 s_id[2]);
4957 return NULL;
4958 }
4959
4960 fcport = qlt_get_port_database(vha, loop_id);
4961 if (!fcport)
4962 return NULL;
4963
4964 if (global_resets !=
4965 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4966 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4967 "qla_target(%d): global reset during session discovery "
4968 "(counter was %d, new %d), retrying", vha->vp_idx,
4969 global_resets,
4970 atomic_read(&vha->vha_tgt.
4971 qla_tgt->tgt_global_resets_count));
4972 goto retry;
4973 }
4974
4975 sess = qlt_create_sess(vha, fcport, true);
4976
4977 kfree(fcport);
4978 return sess;
4979 }
4980
4981 static void qlt_abort_work(struct qla_tgt *tgt,
4982 struct qla_tgt_sess_work_param *prm)
4983 {
4984 struct scsi_qla_host *vha = tgt->vha;
4985 struct qla_hw_data *ha = vha->hw;
4986 struct qla_tgt_sess *sess = NULL;
4987 unsigned long flags;
4988 uint32_t be_s_id;
4989 uint8_t s_id[3];
4990 int rc;
4991
4992 spin_lock_irqsave(&ha->hardware_lock, flags);
4993
4994 if (tgt->tgt_stop)
4995 goto out_term;
4996
4997 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4998 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4999 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5000
5001 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5002 (unsigned char *)&be_s_id);
5003 if (!sess) {
5004 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5005
5006 mutex_lock(&vha->vha_tgt.tgt_mutex);
5007 sess = qlt_make_local_sess(vha, s_id);
5008 /* sess has got an extra creation ref */
5009 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5010
5011 spin_lock_irqsave(&ha->hardware_lock, flags);
5012 if (!sess)
5013 goto out_term;
5014 } else {
5015 kref_get(&sess->se_sess->sess_kref);
5016 }
5017
5018 if (tgt->tgt_stop)
5019 goto out_term;
5020
5021 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5022 if (rc != 0)
5023 goto out_term;
5024
5025 ha->tgt.tgt_ops->put_sess(sess);
5026 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5027 return;
5028
5029 out_term:
5030 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5031 if (sess)
5032 ha->tgt.tgt_ops->put_sess(sess);
5033 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5034 }
5035
5036 static void qlt_tmr_work(struct qla_tgt *tgt,
5037 struct qla_tgt_sess_work_param *prm)
5038 {
5039 struct atio_from_isp *a = &prm->tm_iocb2;
5040 struct scsi_qla_host *vha = tgt->vha;
5041 struct qla_hw_data *ha = vha->hw;
5042 struct qla_tgt_sess *sess = NULL;
5043 unsigned long flags;
5044 uint8_t *s_id = NULL; /* to hide compiler warnings */
5045 int rc;
5046 uint32_t lun, unpacked_lun;
5047 int lun_size, fn;
5048 void *iocb;
5049
5050 spin_lock_irqsave(&ha->hardware_lock, flags);
5051
5052 if (tgt->tgt_stop)
5053 goto out_term;
5054
5055 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5056 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5057 if (!sess) {
5058 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5059
5060 mutex_lock(&vha->vha_tgt.tgt_mutex);
5061 sess = qlt_make_local_sess(vha, s_id);
5062 /* sess has got an extra creation ref */
5063 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5064
5065 spin_lock_irqsave(&ha->hardware_lock, flags);
5066 if (!sess)
5067 goto out_term;
5068 } else {
5069 kref_get(&sess->se_sess->sess_kref);
5070 }
5071
5072 iocb = a;
5073 lun = a->u.isp24.fcp_cmnd.lun;
5074 lun_size = sizeof(lun);
5075 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5076 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5077
5078 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5079 if (rc != 0)
5080 goto out_term;
5081
5082 ha->tgt.tgt_ops->put_sess(sess);
5083 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5084 return;
5085
5086 out_term:
5087 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5088 if (sess)
5089 ha->tgt.tgt_ops->put_sess(sess);
5090 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5091 }
5092
5093 static void qlt_sess_work_fn(struct work_struct *work)
5094 {
5095 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5096 struct scsi_qla_host *vha = tgt->vha;
5097 unsigned long flags;
5098
5099 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5100
5101 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5102 while (!list_empty(&tgt->sess_works_list)) {
5103 struct qla_tgt_sess_work_param *prm = list_entry(
5104 tgt->sess_works_list.next, typeof(*prm),
5105 sess_works_list_entry);
5106
5107 /*
5108 * This work can be scheduled on several CPUs at time, so we
5109 * must delete the entry to eliminate double processing
5110 */
5111 list_del(&prm->sess_works_list_entry);
5112
5113 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5114
5115 switch (prm->type) {
5116 case QLA_TGT_SESS_WORK_ABORT:
5117 qlt_abort_work(tgt, prm);
5118 break;
5119 case QLA_TGT_SESS_WORK_TM:
5120 qlt_tmr_work(tgt, prm);
5121 break;
5122 default:
5123 BUG_ON(1);
5124 break;
5125 }
5126
5127 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5128
5129 kfree(prm);
5130 }
5131 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5132 }
5133
5134 /* Must be called under tgt_host_action_mutex */
5135 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5136 {
5137 struct qla_tgt *tgt;
5138
5139 if (!QLA_TGT_MODE_ENABLED())
5140 return 0;
5141
5142 if (!IS_TGT_MODE_CAPABLE(ha)) {
5143 ql_log(ql_log_warn, base_vha, 0xe070,
5144 "This adapter does not support target mode.\n");
5145 return 0;
5146 }
5147
5148 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5149 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5150
5151 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5152
5153 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5154 if (!tgt) {
5155 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5156 "Unable to allocate struct qla_tgt\n");
5157 return -ENOMEM;
5158 }
5159
5160 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5161 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5162
5163 tgt->ha = ha;
5164 tgt->vha = base_vha;
5165 init_waitqueue_head(&tgt->waitQ);
5166 INIT_LIST_HEAD(&tgt->sess_list);
5167 INIT_LIST_HEAD(&tgt->del_sess_list);
5168 INIT_DELAYED_WORK(&tgt->sess_del_work,
5169 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5170 spin_lock_init(&tgt->sess_work_lock);
5171 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5172 INIT_LIST_HEAD(&tgt->sess_works_list);
5173 spin_lock_init(&tgt->srr_lock);
5174 INIT_LIST_HEAD(&tgt->srr_ctio_list);
5175 INIT_LIST_HEAD(&tgt->srr_imm_list);
5176 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5177 atomic_set(&tgt->tgt_global_resets_count, 0);
5178
5179 base_vha->vha_tgt.qla_tgt = tgt;
5180
5181 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5182 "qla_target(%d): using 64 Bit PCI addressing",
5183 base_vha->vp_idx);
5184 tgt->tgt_enable_64bit_addr = 1;
5185 /* 3 is reserved */
5186 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5187 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5188 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5189
5190 if (base_vha->fc_vport)
5191 return 0;
5192
5193 mutex_lock(&qla_tgt_mutex);
5194 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5195 mutex_unlock(&qla_tgt_mutex);
5196
5197 return 0;
5198 }
5199
5200 /* Must be called under tgt_host_action_mutex */
5201 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5202 {
5203 if (!vha->vha_tgt.qla_tgt)
5204 return 0;
5205
5206 if (vha->fc_vport) {
5207 qlt_release(vha->vha_tgt.qla_tgt);
5208 return 0;
5209 }
5210
5211 /* free left over qfull cmds */
5212 qlt_init_term_exchange(vha);
5213
5214 mutex_lock(&qla_tgt_mutex);
5215 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5216 mutex_unlock(&qla_tgt_mutex);
5217
5218 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5219 vha->host_no, ha);
5220 qlt_release(vha->vha_tgt.qla_tgt);
5221
5222 return 0;
5223 }
5224
5225 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5226 unsigned char *b)
5227 {
5228 int i;
5229
5230 pr_debug("qla2xxx HW vha->node_name: ");
5231 for (i = 0; i < WWN_SIZE; i++)
5232 pr_debug("%02x ", vha->node_name[i]);
5233 pr_debug("\n");
5234 pr_debug("qla2xxx HW vha->port_name: ");
5235 for (i = 0; i < WWN_SIZE; i++)
5236 pr_debug("%02x ", vha->port_name[i]);
5237 pr_debug("\n");
5238
5239 pr_debug("qla2xxx passed configfs WWPN: ");
5240 put_unaligned_be64(wwpn, b);
5241 for (i = 0; i < WWN_SIZE; i++)
5242 pr_debug("%02x ", b[i]);
5243 pr_debug("\n");
5244 }
5245
5246 /**
5247 * qla_tgt_lport_register - register lport with external module
5248 *
5249 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5250 * @wwpn: Passwd FC target WWPN
5251 * @callback: lport initialization callback for tcm_qla2xxx code
5252 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5253 */
5254 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5255 u64 npiv_wwpn, u64 npiv_wwnn,
5256 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5257 {
5258 struct qla_tgt *tgt;
5259 struct scsi_qla_host *vha;
5260 struct qla_hw_data *ha;
5261 struct Scsi_Host *host;
5262 unsigned long flags;
5263 int rc;
5264 u8 b[WWN_SIZE];
5265
5266 mutex_lock(&qla_tgt_mutex);
5267 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5268 vha = tgt->vha;
5269 ha = vha->hw;
5270
5271 host = vha->host;
5272 if (!host)
5273 continue;
5274
5275 if (!(host->hostt->supported_mode & MODE_TARGET))
5276 continue;
5277
5278 spin_lock_irqsave(&ha->hardware_lock, flags);
5279 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5280 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5281 host->host_no);
5282 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5283 continue;
5284 }
5285 if (tgt->tgt_stop) {
5286 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5287 host->host_no);
5288 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5289 continue;
5290 }
5291 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5292
5293 if (!scsi_host_get(host)) {
5294 ql_dbg(ql_dbg_tgt, vha, 0xe068,
5295 "Unable to scsi_host_get() for"
5296 " qla2xxx scsi_host\n");
5297 continue;
5298 }
5299 qlt_lport_dump(vha, phys_wwpn, b);
5300
5301 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5302 scsi_host_put(host);
5303 continue;
5304 }
5305 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5306 if (rc != 0)
5307 scsi_host_put(host);
5308
5309 mutex_unlock(&qla_tgt_mutex);
5310 return rc;
5311 }
5312 mutex_unlock(&qla_tgt_mutex);
5313
5314 return -ENODEV;
5315 }
5316 EXPORT_SYMBOL(qlt_lport_register);
5317
5318 /**
5319 * qla_tgt_lport_deregister - Degister lport
5320 *
5321 * @vha: Registered scsi_qla_host pointer
5322 */
5323 void qlt_lport_deregister(struct scsi_qla_host *vha)
5324 {
5325 struct qla_hw_data *ha = vha->hw;
5326 struct Scsi_Host *sh = vha->host;
5327 /*
5328 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5329 */
5330 vha->vha_tgt.target_lport_ptr = NULL;
5331 ha->tgt.tgt_ops = NULL;
5332 /*
5333 * Release the Scsi_Host reference for the underlying qla2xxx host
5334 */
5335 scsi_host_put(sh);
5336 }
5337 EXPORT_SYMBOL(qlt_lport_deregister);
5338
5339 /* Must be called under HW lock */
5340 static void qlt_set_mode(struct scsi_qla_host *vha)
5341 {
5342 struct qla_hw_data *ha = vha->hw;
5343
5344 switch (ql2x_ini_mode) {
5345 case QLA2XXX_INI_MODE_DISABLED:
5346 case QLA2XXX_INI_MODE_EXCLUSIVE:
5347 vha->host->active_mode = MODE_TARGET;
5348 break;
5349 case QLA2XXX_INI_MODE_ENABLED:
5350 vha->host->active_mode |= MODE_TARGET;
5351 break;
5352 default:
5353 break;
5354 }
5355
5356 if (ha->tgt.ini_mode_force_reverse)
5357 qla_reverse_ini_mode(vha);
5358 }
5359
5360 /* Must be called under HW lock */
5361 static void qlt_clear_mode(struct scsi_qla_host *vha)
5362 {
5363 struct qla_hw_data *ha = vha->hw;
5364
5365 switch (ql2x_ini_mode) {
5366 case QLA2XXX_INI_MODE_DISABLED:
5367 vha->host->active_mode = MODE_UNKNOWN;
5368 break;
5369 case QLA2XXX_INI_MODE_EXCLUSIVE:
5370 vha->host->active_mode = MODE_INITIATOR;
5371 break;
5372 case QLA2XXX_INI_MODE_ENABLED:
5373 vha->host->active_mode &= ~MODE_TARGET;
5374 break;
5375 default:
5376 break;
5377 }
5378
5379 if (ha->tgt.ini_mode_force_reverse)
5380 qla_reverse_ini_mode(vha);
5381 }
5382
5383 /*
5384 * qla_tgt_enable_vha - NO LOCK HELD
5385 *
5386 * host_reset, bring up w/ Target Mode Enabled
5387 */
5388 void
5389 qlt_enable_vha(struct scsi_qla_host *vha)
5390 {
5391 struct qla_hw_data *ha = vha->hw;
5392 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5393 unsigned long flags;
5394 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5395
5396 if (!tgt) {
5397 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5398 "Unable to locate qla_tgt pointer from"
5399 " struct qla_hw_data\n");
5400 dump_stack();
5401 return;
5402 }
5403
5404 spin_lock_irqsave(&ha->hardware_lock, flags);
5405 tgt->tgt_stopped = 0;
5406 qlt_set_mode(vha);
5407 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5408
5409 if (vha->vp_idx) {
5410 qla24xx_disable_vp(vha);
5411 qla24xx_enable_vp(vha);
5412 } else {
5413 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5414 qla2xxx_wake_dpc(base_vha);
5415 qla2x00_wait_for_hba_online(base_vha);
5416 }
5417 }
5418 EXPORT_SYMBOL(qlt_enable_vha);
5419
5420 /*
5421 * qla_tgt_disable_vha - NO LOCK HELD
5422 *
5423 * Disable Target Mode and reset the adapter
5424 */
5425 static void qlt_disable_vha(struct scsi_qla_host *vha)
5426 {
5427 struct qla_hw_data *ha = vha->hw;
5428 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5429 unsigned long flags;
5430
5431 if (!tgt) {
5432 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5433 "Unable to locate qla_tgt pointer from"
5434 " struct qla_hw_data\n");
5435 dump_stack();
5436 return;
5437 }
5438
5439 spin_lock_irqsave(&ha->hardware_lock, flags);
5440 qlt_clear_mode(vha);
5441 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5442
5443 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5444 qla2xxx_wake_dpc(vha);
5445 qla2x00_wait_for_hba_online(vha);
5446 }
5447
5448 /*
5449 * Called from qla_init.c:qla24xx_vport_create() contex to setup
5450 * the target mode specific struct scsi_qla_host and struct qla_hw_data
5451 * members.
5452 */
5453 void
5454 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5455 {
5456 if (!qla_tgt_mode_enabled(vha))
5457 return;
5458
5459 vha->vha_tgt.qla_tgt = NULL;
5460
5461 mutex_init(&vha->vha_tgt.tgt_mutex);
5462 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5463
5464 qlt_clear_mode(vha);
5465
5466 /*
5467 * NOTE: Currently the value is kept the same for <24xx and
5468 * >=24xx ISPs. If it is necessary to change it,
5469 * the check should be added for specific ISPs,
5470 * assigning the value appropriately.
5471 */
5472 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5473
5474 qlt_add_target(ha, vha);
5475 }
5476
5477 void
5478 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5479 {
5480 /*
5481 * FC-4 Feature bit 0 indicates target functionality to the name server.
5482 */
5483 if (qla_tgt_mode_enabled(vha)) {
5484 if (qla_ini_mode_enabled(vha))
5485 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5486 else
5487 ct_req->req.rff_id.fc4_feature = BIT_0;
5488 } else if (qla_ini_mode_enabled(vha)) {
5489 ct_req->req.rff_id.fc4_feature = BIT_1;
5490 }
5491 }
5492
5493 /*
5494 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5495 * @ha: HA context
5496 *
5497 * Beginning of ATIO ring has initialization control block already built
5498 * by nvram config routine.
5499 *
5500 * Returns 0 on success.
5501 */
5502 void
5503 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5504 {
5505 struct qla_hw_data *ha = vha->hw;
5506 uint16_t cnt;
5507 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5508
5509 if (!qla_tgt_mode_enabled(vha))
5510 return;
5511
5512 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5513 pkt->u.raw.signature = ATIO_PROCESSED;
5514 pkt++;
5515 }
5516
5517 }
5518
5519 /*
5520 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5521 * @ha: SCSI driver HA context
5522 */
5523 void
5524 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5525 {
5526 struct qla_hw_data *ha = vha->hw;
5527 struct atio_from_isp *pkt;
5528 int cnt, i;
5529
5530 if (!vha->flags.online)
5531 return;
5532
5533 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5534 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5535 cnt = pkt->u.raw.entry_count;
5536
5537 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5538
5539 for (i = 0; i < cnt; i++) {
5540 ha->tgt.atio_ring_index++;
5541 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5542 ha->tgt.atio_ring_index = 0;
5543 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5544 } else
5545 ha->tgt.atio_ring_ptr++;
5546
5547 pkt->u.raw.signature = ATIO_PROCESSED;
5548 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5549 }
5550 wmb();
5551 }
5552
5553 /* Adjust ring index */
5554 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5555 }
5556
5557 void
5558 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5559 {
5560 struct qla_hw_data *ha = vha->hw;
5561 if (!QLA_TGT_MODE_ENABLED())
5562 return;
5563
5564 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5565 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5566 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5567
5568 if (IS_ATIO_MSIX_CAPABLE(ha)) {
5569 struct qla_msix_entry *msix = &ha->msix_entries[2];
5570 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5571
5572 icb->msix_atio = cpu_to_le16(msix->entry);
5573 ql_dbg(ql_dbg_init, vha, 0xf072,
5574 "Registering ICB vector 0x%x for atio que.\n",
5575 msix->entry);
5576 }
5577 }
5578
5579 void
5580 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5581 {
5582 struct qla_hw_data *ha = vha->hw;
5583
5584 if (qla_tgt_mode_enabled(vha)) {
5585 if (!ha->tgt.saved_set) {
5586 /* We save only once */
5587 ha->tgt.saved_exchange_count = nv->exchange_count;
5588 ha->tgt.saved_firmware_options_1 =
5589 nv->firmware_options_1;
5590 ha->tgt.saved_firmware_options_2 =
5591 nv->firmware_options_2;
5592 ha->tgt.saved_firmware_options_3 =
5593 nv->firmware_options_3;
5594 ha->tgt.saved_set = 1;
5595 }
5596
5597 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5598
5599 /* Enable target mode */
5600 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5601
5602 /* Disable ini mode, if requested */
5603 if (!qla_ini_mode_enabled(vha))
5604 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5605
5606 /* Disable Full Login after LIP */
5607 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5608 /* Enable initial LIP */
5609 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5610 if (ql2xtgt_tape_enable)
5611 /* Enable FC Tape support */
5612 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5613 else
5614 /* Disable FC Tape support */
5615 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5616
5617 /* Disable Full Login after LIP */
5618 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5619 /* Enable target PRLI control */
5620 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5621 } else {
5622 if (ha->tgt.saved_set) {
5623 nv->exchange_count = ha->tgt.saved_exchange_count;
5624 nv->firmware_options_1 =
5625 ha->tgt.saved_firmware_options_1;
5626 nv->firmware_options_2 =
5627 ha->tgt.saved_firmware_options_2;
5628 nv->firmware_options_3 =
5629 ha->tgt.saved_firmware_options_3;
5630 }
5631 return;
5632 }
5633
5634 /* out-of-order frames reassembly */
5635 nv->firmware_options_3 |= BIT_6|BIT_9;
5636
5637 if (ha->tgt.enable_class_2) {
5638 if (vha->flags.init_done)
5639 fc_host_supported_classes(vha->host) =
5640 FC_COS_CLASS2 | FC_COS_CLASS3;
5641
5642 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5643 } else {
5644 if (vha->flags.init_done)
5645 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5646
5647 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5648 }
5649 }
5650
5651 void
5652 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5653 struct init_cb_24xx *icb)
5654 {
5655 struct qla_hw_data *ha = vha->hw;
5656
5657 if (ha->tgt.node_name_set) {
5658 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5659 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5660 }
5661 }
5662
5663 void
5664 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5665 {
5666 struct qla_hw_data *ha = vha->hw;
5667
5668 if (!QLA_TGT_MODE_ENABLED())
5669 return;
5670
5671 if (qla_tgt_mode_enabled(vha)) {
5672 if (!ha->tgt.saved_set) {
5673 /* We save only once */
5674 ha->tgt.saved_exchange_count = nv->exchange_count;
5675 ha->tgt.saved_firmware_options_1 =
5676 nv->firmware_options_1;
5677 ha->tgt.saved_firmware_options_2 =
5678 nv->firmware_options_2;
5679 ha->tgt.saved_firmware_options_3 =
5680 nv->firmware_options_3;
5681 ha->tgt.saved_set = 1;
5682 }
5683
5684 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5685
5686 /* Enable target mode */
5687 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5688
5689 /* Disable ini mode, if requested */
5690 if (!qla_ini_mode_enabled(vha))
5691 nv->firmware_options_1 |=
5692 __constant_cpu_to_le32(BIT_5);
5693
5694 /* Disable Full Login after LIP */
5695 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5696 /* Enable initial LIP */
5697 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5698 if (ql2xtgt_tape_enable)
5699 /* Enable FC tape support */
5700 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5701 else
5702 /* Disable FC tape support */
5703 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5704
5705 /* Disable Full Login after LIP */
5706 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5707 /* Enable target PRLI control */
5708 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5709 } else {
5710 if (ha->tgt.saved_set) {
5711 nv->exchange_count = ha->tgt.saved_exchange_count;
5712 nv->firmware_options_1 =
5713 ha->tgt.saved_firmware_options_1;
5714 nv->firmware_options_2 =
5715 ha->tgt.saved_firmware_options_2;
5716 nv->firmware_options_3 =
5717 ha->tgt.saved_firmware_options_3;
5718 }
5719 return;
5720 }
5721
5722 /* out-of-order frames reassembly */
5723 nv->firmware_options_3 |= BIT_6|BIT_9;
5724
5725 if (ha->tgt.enable_class_2) {
5726 if (vha->flags.init_done)
5727 fc_host_supported_classes(vha->host) =
5728 FC_COS_CLASS2 | FC_COS_CLASS3;
5729
5730 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5731 } else {
5732 if (vha->flags.init_done)
5733 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5734
5735 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5736 }
5737 }
5738
5739 void
5740 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5741 struct init_cb_81xx *icb)
5742 {
5743 struct qla_hw_data *ha = vha->hw;
5744
5745 if (!QLA_TGT_MODE_ENABLED())
5746 return;
5747
5748 if (ha->tgt.node_name_set) {
5749 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5750 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5751 }
5752 }
5753
5754 void
5755 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5756 {
5757 if (!QLA_TGT_MODE_ENABLED())
5758 return;
5759
5760 ha->msix_count += 1; /* For ATIO Q */
5761 }
5762
5763 int
5764 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5765 struct sts_entry_24xx *pkt)
5766 {
5767 switch (pkt->entry_type) {
5768 case ABTS_RECV_24XX:
5769 case ABTS_RESP_24XX:
5770 case CTIO_TYPE7:
5771 case NOTIFY_ACK_TYPE:
5772 case CTIO_CRC2:
5773 return 1;
5774 default:
5775 return 0;
5776 }
5777 }
5778
5779 void
5780 qlt_modify_vp_config(struct scsi_qla_host *vha,
5781 struct vp_config_entry_24xx *vpmod)
5782 {
5783 if (qla_tgt_mode_enabled(vha))
5784 vpmod->options_idx1 &= ~BIT_5;
5785 /* Disable ini mode, if requested */
5786 if (!qla_ini_mode_enabled(vha))
5787 vpmod->options_idx1 &= ~BIT_4;
5788 }
5789
5790 void
5791 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5792 {
5793 if (!QLA_TGT_MODE_ENABLED())
5794 return;
5795
5796 if (ha->mqenable || IS_QLA83XX(ha)) {
5797 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5798 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5799 } else {
5800 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5801 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5802 }
5803
5804 mutex_init(&base_vha->vha_tgt.tgt_mutex);
5805 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5806 qlt_clear_mode(base_vha);
5807 }
5808
5809 irqreturn_t
5810 qla83xx_msix_atio_q(int irq, void *dev_id)
5811 {
5812 struct rsp_que *rsp;
5813 scsi_qla_host_t *vha;
5814 struct qla_hw_data *ha;
5815 unsigned long flags;
5816
5817 rsp = (struct rsp_que *) dev_id;
5818 ha = rsp->hw;
5819 vha = pci_get_drvdata(ha->pdev);
5820
5821 spin_lock_irqsave(&ha->hardware_lock, flags);
5822
5823 qlt_24xx_process_atio_queue(vha);
5824 qla24xx_process_response_queue(vha, rsp);
5825
5826 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5827
5828 return IRQ_HANDLED;
5829 }
5830
5831 int
5832 qlt_mem_alloc(struct qla_hw_data *ha)
5833 {
5834 if (!QLA_TGT_MODE_ENABLED())
5835 return 0;
5836
5837 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5838 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5839 if (!ha->tgt.tgt_vp_map)
5840 return -ENOMEM;
5841
5842 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5843 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5844 &ha->tgt.atio_dma, GFP_KERNEL);
5845 if (!ha->tgt.atio_ring) {
5846 kfree(ha->tgt.tgt_vp_map);
5847 return -ENOMEM;
5848 }
5849 return 0;
5850 }
5851
5852 void
5853 qlt_mem_free(struct qla_hw_data *ha)
5854 {
5855 if (!QLA_TGT_MODE_ENABLED())
5856 return;
5857
5858 if (ha->tgt.atio_ring) {
5859 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5860 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5861 ha->tgt.atio_dma);
5862 }
5863 kfree(ha->tgt.tgt_vp_map);
5864 }
5865
5866 /* vport_slock to be held by the caller */
5867 void
5868 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5869 {
5870 if (!QLA_TGT_MODE_ENABLED())
5871 return;
5872
5873 switch (cmd) {
5874 case SET_VP_IDX:
5875 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5876 break;
5877 case SET_AL_PA:
5878 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5879 break;
5880 case RESET_VP_IDX:
5881 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5882 break;
5883 case RESET_AL_PA:
5884 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5885 break;
5886 }
5887 }
5888
5889 static int __init qlt_parse_ini_mode(void)
5890 {
5891 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5892 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5893 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5894 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5895 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5896 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5897 else
5898 return false;
5899
5900 return true;
5901 }
5902
5903 int __init qlt_init(void)
5904 {
5905 int ret;
5906
5907 if (!qlt_parse_ini_mode()) {
5908 ql_log(ql_log_fatal, NULL, 0xe06b,
5909 "qlt_parse_ini_mode() failed\n");
5910 return -EINVAL;
5911 }
5912
5913 if (!QLA_TGT_MODE_ENABLED())
5914 return 0;
5915
5916 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5917 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5918 qla_tgt_mgmt_cmd), 0, NULL);
5919 if (!qla_tgt_mgmt_cmd_cachep) {
5920 ql_log(ql_log_fatal, NULL, 0xe06d,
5921 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5922 return -ENOMEM;
5923 }
5924
5925 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5926 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5927 if (!qla_tgt_mgmt_cmd_mempool) {
5928 ql_log(ql_log_fatal, NULL, 0xe06e,
5929 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5930 ret = -ENOMEM;
5931 goto out_mgmt_cmd_cachep;
5932 }
5933
5934 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5935 if (!qla_tgt_wq) {
5936 ql_log(ql_log_fatal, NULL, 0xe06f,
5937 "alloc_workqueue for qla_tgt_wq failed\n");
5938 ret = -ENOMEM;
5939 goto out_cmd_mempool;
5940 }
5941 /*
5942 * Return 1 to signal that initiator-mode is being disabled
5943 */
5944 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5945
5946 out_cmd_mempool:
5947 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5948 out_mgmt_cmd_cachep:
5949 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5950 return ret;
5951 }
5952
5953 void qlt_exit(void)
5954 {
5955 if (!QLA_TGT_MODE_ENABLED())
5956 return;
5957
5958 destroy_workqueue(qla_tgt_wq);
5959 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5960 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5961 }
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