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Merge remote-tracking branch 'regmap/topic/debugfs' into regmap-next
[linux-2.6-block.git] / drivers / scsi / qla2xxx / qla_target.c
CommitLineData
2d70c103
NB		 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) 2010-2011 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>
2d70c103
NB		 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
45static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
46module_param(qlini_mode, charp, S_IRUGO);
47MODULE_PARM_DESC(qlini_mode,
48 "Determines when initiator mode will be enabled. Possible values: "
49 "\"exclusive\" - initiator mode will be enabled on load, "
50 "disabled on enabling target mode and then on disabling target mode "
51 "enabled back; "
52 "\"disabled\" - initiator mode will never be enabled; "
53 "\"enabled\" (default) - initiator mode will always stay enabled.");
54
55static int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
56
57/*
58 * From scsi/fc/fc_fcp.h
59 */
60enum fcp_resp_rsp_codes {
61 FCP_TMF_CMPL = 0,
62 FCP_DATA_LEN_INVALID = 1,
63 FCP_CMND_FIELDS_INVALID = 2,
64 FCP_DATA_PARAM_MISMATCH = 3,
65 FCP_TMF_REJECTED = 4,
66 FCP_TMF_FAILED = 5,
67 FCP_TMF_INVALID_LUN = 9,
68};
69
70/*
71 * fc_pri_ta from scsi/fc/fc_fcp.h
72 */
73#define FCP_PTA_SIMPLE 0 /* simple task attribute */
74#define FCP_PTA_HEADQ 1 /* head of queue task attribute */
75#define FCP_PTA_ORDERED 2 /* ordered task attribute */
76#define FCP_PTA_ACA 4 /* auto. contigent allegiance */
77#define FCP_PTA_MASK 7 /* mask for task attribute field */
78#define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */
79#define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */
80
81/*
82 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
83 * must be called under HW lock and could unlock/lock it inside.
84 * It isn't an issue, since in the current implementation on the time when
85 * those functions are called:
86 *
87 * - Either context is IRQ and only IRQ handler can modify HW data,
88 * including rings related fields,
89 *
90 * - Or access to target mode variables from struct qla_tgt doesn't
91 * cross those functions boundaries, except tgt_stop, which
92 * additionally protected by irq_cmd_count.
93 */
94/* Predefs for callbacks handed to qla2xxx LLD */
95static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
96 struct atio_from_isp *pkt);
97static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
98static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
99 int fn, void *iocb, int flags);
100static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
101 *cmd, struct atio_from_isp *atio, int ha_locked);
102static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
103 struct qla_tgt_srr_imm *imm, int ha_lock);
104/*
105 * Global Variables
106 */
107static struct kmem_cache *qla_tgt_cmd_cachep;
108static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
109static mempool_t *qla_tgt_mgmt_cmd_mempool;
110static struct workqueue_struct *qla_tgt_wq;
111static DEFINE_MUTEX(qla_tgt_mutex);
112static LIST_HEAD(qla_tgt_glist);
113
114/* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
115static struct qla_tgt_sess *qlt_find_sess_by_port_name(
116 struct qla_tgt *tgt,
117 const uint8_t *port_name)
118{
119 struct qla_tgt_sess *sess;
120
121 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
122 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
123 return sess;
124 }
125
126 return NULL;
127}
128
129/* Might release hw lock, then reaquire!! */
130static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
131{
132 /* Send marker if required */
133 if (unlikely(vha->marker_needed != 0)) {
134 int rc = qla2x00_issue_marker(vha, vha_locked);
135 if (rc != QLA_SUCCESS) {
136 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
137 "qla_target(%d): issue_marker() failed\n",
138 vha->vp_idx);
139 }
140 return rc;
141 }
142 return QLA_SUCCESS;
143}
144
145static inline
146struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
147 uint8_t *d_id)
148{
149 struct qla_hw_data *ha = vha->hw;
150 uint8_t vp_idx;
151
152 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
153 return NULL;
154
155 if (vha->d_id.b.al_pa == d_id[2])
156 return vha;
157
158 BUG_ON(ha->tgt.tgt_vp_map == NULL);
159 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
160 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
161 return ha->tgt.tgt_vp_map[vp_idx].vha;
162
163 return NULL;
164}
165
166static inline
167struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
168 uint16_t vp_idx)
169{
170 struct qla_hw_data *ha = vha->hw;
171
172 if (vha->vp_idx == vp_idx)
173 return vha;
174
175 BUG_ON(ha->tgt.tgt_vp_map == NULL);
176 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
177 return ha->tgt.tgt_vp_map[vp_idx].vha;
178
179 return NULL;
180}
181
182void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
183 struct atio_from_isp *atio)
184{
185 switch (atio->u.raw.entry_type) {
186 case ATIO_TYPE7:
187 {
188 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
189 atio->u.isp24.fcp_hdr.d_id);
190 if (unlikely(NULL == host)) {
191 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
192 "qla_target(%d): Received ATIO_TYPE7 "
193 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
194 atio->u.isp24.fcp_hdr.d_id[0],
195 atio->u.isp24.fcp_hdr.d_id[1],
196 atio->u.isp24.fcp_hdr.d_id[2]);
197 break;
198 }
199 qlt_24xx_atio_pkt(host, atio);
200 break;
201 }
202
203 case IMMED_NOTIFY_TYPE:
204 {
205 struct scsi_qla_host *host = vha;
206 struct imm_ntfy_from_isp *entry =
207 (struct imm_ntfy_from_isp *)atio;
208
209 if ((entry->u.isp24.vp_index != 0xFF) &&
210 (entry->u.isp24.nport_handle != 0xFFFF)) {
211 host = qlt_find_host_by_vp_idx(vha,
212 entry->u.isp24.vp_index);
213 if (unlikely(!host)) {
214 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
215 "qla_target(%d): Received "
216 "ATIO (IMMED_NOTIFY_TYPE) "
217 "with unknown vp_index %d\n",
218 vha->vp_idx, entry->u.isp24.vp_index);
219 break;
220 }
221 }
222 qlt_24xx_atio_pkt(host, atio);
223 break;
224 }
225
226 default:
227 ql_dbg(ql_dbg_tgt, vha, 0xe040,
228 "qla_target(%d): Received unknown ATIO atio "
229 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
230 break;
231 }
232
233 return;
234}
235
236void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
237{
238 switch (pkt->entry_type) {
239 case CTIO_TYPE7:
240 {
241 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
242 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
243 entry->vp_index);
244 if (unlikely(!host)) {
245 ql_dbg(ql_dbg_tgt, vha, 0xe041,
246 "qla_target(%d): Response pkt (CTIO_TYPE7) "
247 "received, with unknown vp_index %d\n",
248 vha->vp_idx, entry->vp_index);
249 break;
250 }
251 qlt_response_pkt(host, pkt);
252 break;
253 }
254
255 case IMMED_NOTIFY_TYPE:
256 {
257 struct scsi_qla_host *host = vha;
258 struct imm_ntfy_from_isp *entry =
259 (struct imm_ntfy_from_isp *)pkt;
260
261 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
262 if (unlikely(!host)) {
263 ql_dbg(ql_dbg_tgt, vha, 0xe042,
264 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
265 "received, with unknown vp_index %d\n",
266 vha->vp_idx, entry->u.isp24.vp_index);
267 break;
268 }
269 qlt_response_pkt(host, pkt);
270 break;
271 }
272
273 case NOTIFY_ACK_TYPE:
274 {
275 struct scsi_qla_host *host = vha;
276 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
277
278 if (0xFF != entry->u.isp24.vp_index) {
279 host = qlt_find_host_by_vp_idx(vha,
280 entry->u.isp24.vp_index);
281 if (unlikely(!host)) {
282 ql_dbg(ql_dbg_tgt, vha, 0xe043,
283 "qla_target(%d): Response "
284 "pkt (NOTIFY_ACK_TYPE) "
285 "received, with unknown "
286 "vp_index %d\n", vha->vp_idx,
287 entry->u.isp24.vp_index);
288 break;
289 }
290 }
291 qlt_response_pkt(host, pkt);
292 break;
293 }
294
295 case ABTS_RECV_24XX:
296 {
297 struct abts_recv_from_24xx *entry =
298 (struct abts_recv_from_24xx *)pkt;
299 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
300 entry->vp_index);
301 if (unlikely(!host)) {
302 ql_dbg(ql_dbg_tgt, vha, 0xe044,
303 "qla_target(%d): Response pkt "
304 "(ABTS_RECV_24XX) received, with unknown "
305 "vp_index %d\n", vha->vp_idx, entry->vp_index);
306 break;
307 }
308 qlt_response_pkt(host, pkt);
309 break;
310 }
311
312 case ABTS_RESP_24XX:
313 {
314 struct abts_resp_to_24xx *entry =
315 (struct abts_resp_to_24xx *)pkt;
316 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
317 entry->vp_index);
318 if (unlikely(!host)) {
319 ql_dbg(ql_dbg_tgt, vha, 0xe045,
320 "qla_target(%d): Response pkt "
321 "(ABTS_RECV_24XX) received, with unknown "
322 "vp_index %d\n", vha->vp_idx, entry->vp_index);
323 break;
324 }
325 qlt_response_pkt(host, pkt);
326 break;
327 }
328
329 default:
330 qlt_response_pkt(vha, pkt);
331 break;
332 }
333
334}
335
336static void qlt_free_session_done(struct work_struct *work)
337{
338 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
339 free_work);
340 struct qla_tgt *tgt = sess->tgt;
341 struct scsi_qla_host *vha = sess->vha;
342 struct qla_hw_data *ha = vha->hw;
343
344 BUG_ON(!tgt);
345 /*
346 * Release the target session for FC Nexus from fabric module code.
347 */
348 if (sess->se_sess != NULL)
349 ha->tgt.tgt_ops->free_session(sess);
350
351 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
352 "Unregistration of sess %p finished\n", sess);
353
354 kfree(sess);
355 /*
356 * We need to protect against race, when tgt is freed before or
357 * inside wake_up()
358 */
359 tgt->sess_count--;
360 if (tgt->sess_count == 0)
361 wake_up_all(&tgt->waitQ);
362}
363
364/* ha->hardware_lock supposed to be held on entry */
365void qlt_unreg_sess(struct qla_tgt_sess *sess)
366{
367 struct scsi_qla_host *vha = sess->vha;
368
369 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
370
371 list_del(&sess->sess_list_entry);
372 if (sess->deleted)
373 list_del(&sess->del_list_entry);
374
375 INIT_WORK(&sess->free_work, qlt_free_session_done);
376 schedule_work(&sess->free_work);
377}
378EXPORT_SYMBOL(qlt_unreg_sess);
379
380/* ha->hardware_lock supposed to be held on entry */
381static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
382{
383 struct qla_hw_data *ha = vha->hw;
384 struct qla_tgt_sess *sess = NULL;
385 uint32_t unpacked_lun, lun = 0;
386 uint16_t loop_id;
387 int res = 0;
388 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
389 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
390
391 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
392 if (loop_id == 0xFFFF) {
393#if 0 /* FIXME: Re-enable Global event handling.. */
394 /* Global event */
395 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
396 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
397 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
398 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
399 typeof(*sess), sess_list_entry);
400 switch (mcmd) {
401 case QLA_TGT_NEXUS_LOSS_SESS:
402 mcmd = QLA_TGT_NEXUS_LOSS;
403 break;
404 case QLA_TGT_ABORT_ALL_SESS:
405 mcmd = QLA_TGT_ABORT_ALL;
406 break;
407 case QLA_TGT_NEXUS_LOSS:
408 case QLA_TGT_ABORT_ALL:
409 break;
410 default:
411 ql_dbg(ql_dbg_tgt, vha, 0xe046,
412 "qla_target(%d): Not allowed "
413 "command %x in %s", vha->vp_idx,
414 mcmd, __func__);
415 sess = NULL;
416 break;
417 }
418 } else
419 sess = NULL;
420#endif
421 } else {
422 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
423 }
424
425 ql_dbg(ql_dbg_tgt, vha, 0xe000,
426 "Using sess for qla_tgt_reset: %p\n", sess);
427 if (!sess) {
428 res = -ESRCH;
429 return res;
430 }
431
432 ql_dbg(ql_dbg_tgt, vha, 0xe047,
433 "scsi(%ld): resetting (session %p from port "
434 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
435 "mcmd %x, loop_id %d)\n", vha->host_no, sess,
436 sess->port_name[0], sess->port_name[1],
437 sess->port_name[2], sess->port_name[3],
438 sess->port_name[4], sess->port_name[5],
439 sess->port_name[6], sess->port_name[7],
440 mcmd, loop_id);
441
442 lun = a->u.isp24.fcp_cmnd.lun;
443 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
444
445 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
446 iocb, QLA24XX_MGMT_SEND_NACK);
447}
448
449/* ha->hardware_lock supposed to be held on entry */
450static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
451 bool immediate)
452{
453 struct qla_tgt *tgt = sess->tgt;
454 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
455
456 if (sess->deleted)
457 return;
458
459 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
460 "Scheduling sess %p for deletion\n", sess);
461 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
462 sess->deleted = 1;
463
464 if (immediate)
465 dev_loss_tmo = 0;
466
467 sess->expires = jiffies + dev_loss_tmo * HZ;
468
469 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
470 "qla_target(%d): session for port %02x:%02x:%02x:"
471 "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for "
472 "deletion in %u secs (expires: %lu) immed: %d\n",
473 sess->vha->vp_idx,
474 sess->port_name[0], sess->port_name[1],
475 sess->port_name[2], sess->port_name[3],
476 sess->port_name[4], sess->port_name[5],
477 sess->port_name[6], sess->port_name[7],
478 sess->loop_id, dev_loss_tmo, sess->expires, immediate);
479
480 if (immediate)
481 schedule_delayed_work(&tgt->sess_del_work, 0);
482 else
483 schedule_delayed_work(&tgt->sess_del_work,
484 jiffies - sess->expires);
485}
486
487/* ha->hardware_lock supposed to be held on entry */
488static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
489{
490 struct qla_tgt_sess *sess;
491
492 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
493 qlt_schedule_sess_for_deletion(sess, true);
494
495 /* At this point tgt could be already dead */
496}
497
498static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
499 uint16_t *loop_id)
500{
501 struct qla_hw_data *ha = vha->hw;
502 dma_addr_t gid_list_dma;
503 struct gid_list_info *gid_list;
504 char *id_iter;
505 int res, rc, i;
506 uint16_t entries;
507
508 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
509 &gid_list_dma, GFP_KERNEL);
510 if (!gid_list) {
511 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
512 "qla_target(%d): DMA Alloc failed of %u\n",
513 vha->vp_idx, qla2x00_gid_list_size(ha));
514 return -ENOMEM;
515 }
516
517 /* Get list of logged in devices */
518 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
519 if (rc != QLA_SUCCESS) {
520 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
521 "qla_target(%d): get_id_list() failed: %x\n",
522 vha->vp_idx, rc);
523 res = -1;
524 goto out_free_id_list;
525 }
526
527 id_iter = (char *)gid_list;
528 res = -1;
529 for (i = 0; i < entries; i++) {
530 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
531 if ((gid->al_pa == s_id[2]) &&
532 (gid->area == s_id[1]) &&
533 (gid->domain == s_id[0])) {
534 *loop_id = le16_to_cpu(gid->loop_id);
535 res = 0;
536 break;
537 }
538 id_iter += ha->gid_list_info_size;
539 }
540
541out_free_id_list:
542 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
543 gid_list, gid_list_dma);
544 return res;
545}
546
547static bool qlt_check_fcport_exist(struct scsi_qla_host *vha,
548 struct qla_tgt_sess *sess)
549{
550 struct qla_hw_data *ha = vha->hw;
551 struct qla_port_24xx_data *pmap24;
552 bool res, found = false;
553 int rc, i;
554 uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */
555 uint16_t entries;
556 void *pmap;
557 int pmap_len;
558 fc_port_t *fcport;
559 int global_resets;
c8292d1d 560 unsigned long flags;
2d70c103
NB		 561
562retry:
563 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
564
565 rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len);
566 if (rc != QLA_SUCCESS) {
567 res = false;
568 goto out;
569 }
570
571 pmap24 = pmap;
572 entries = pmap_len/sizeof(*pmap24);
573
574 for (i = 0; i < entries; ++i) {
575 if (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) {
576 loop_id = le16_to_cpu(pmap24[i].loop_id);
577 found = true;
578 break;
579 }
580 }
581
582 kfree(pmap);
583
584 if (!found) {
585 res = false;
586 goto out;
587 }
588
589 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046,
590 "qlt_check_fcport_exist(): loop_id %d", loop_id);
591
592 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
593 if (fcport == NULL) {
594 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047,
595 "qla_target(%d): Allocation of tmp FC port failed",
596 vha->vp_idx);
597 res = false;
598 goto out;
599 }
600
601 fcport->loop_id = loop_id;
602
603 rc = qla2x00_get_port_database(vha, fcport, 0);
604 if (rc != QLA_SUCCESS) {
605 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048,
606 "qla_target(%d): Failed to retrieve fcport "
607 "information -- get_port_database() returned %x "
608 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
609 res = false;
610 goto out_free_fcport;
611 }
612
613 if (global_resets !=
614 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
615 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
616 "qla_target(%d): global reset during session discovery"
617 " (counter was %d, new %d), retrying",
618 vha->vp_idx, global_resets,
619 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
620 goto retry;
621 }
622
623 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
624 "Updating sess %p s_id %x:%x:%x, loop_id %d) to d_id %x:%x:%x, "
625 "loop_id %d", sess, sess->s_id.b.domain, sess->s_id.b.al_pa,
626 sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain,
627 fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id);
628
c8292d1d
RD		 629 spin_lock_irqsave(&ha->hardware_lock, flags);
630 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
631 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
632 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2d70c103
NB		 633
634 res = true;
635
636out_free_fcport:
637 kfree(fcport);
638
639out:
640 return res;
641}
642
643/* ha->hardware_lock supposed to be held on entry */
644static void qlt_undelete_sess(struct qla_tgt_sess *sess)
645{
646 BUG_ON(!sess->deleted);
647
648 list_del(&sess->del_list_entry);
649 sess->deleted = 0;
650}
651
652static void qlt_del_sess_work_fn(struct delayed_work *work)
653{
654 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
655 sess_del_work);
656 struct scsi_qla_host *vha = tgt->vha;
657 struct qla_hw_data *ha = vha->hw;
658 struct qla_tgt_sess *sess;
659 unsigned long flags;
660
661 spin_lock_irqsave(&ha->hardware_lock, flags);
662 while (!list_empty(&tgt->del_sess_list)) {
663 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
664 del_list_entry);
665 if (time_after_eq(jiffies, sess->expires)) {
666 bool cancel;
667
668 qlt_undelete_sess(sess);
669
670 spin_unlock_irqrestore(&ha->hardware_lock, flags);
671 cancel = qlt_check_fcport_exist(vha, sess);
672
673 if (cancel) {
674 if (sess->deleted) {
675 /*
676 * sess was again deleted while we were
677 * discovering it
678 */
679 spin_lock_irqsave(&ha->hardware_lock,
680 flags);
681 continue;
682 }
683
684 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049,
685 "qla_target(%d): cancel deletion of "
686 "session for port %02x:%02x:%02x:%02x:%02x:"
687 "%02x:%02x:%02x (loop ID %d), because "
688 " it isn't deleted by firmware",
689 vha->vp_idx, sess->port_name[0],
690 sess->port_name[1], sess->port_name[2],
691 sess->port_name[3], sess->port_name[4],
692 sess->port_name[5], sess->port_name[6],
693 sess->port_name[7], sess->loop_id);
694 } else {
695 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
696 "Timeout: sess %p about to be deleted\n",
697 sess);
698 ha->tgt.tgt_ops->shutdown_sess(sess);
699 ha->tgt.tgt_ops->put_sess(sess);
700 }
701
702 spin_lock_irqsave(&ha->hardware_lock, flags);
703 } else {
704 schedule_delayed_work(&tgt->sess_del_work,
705 jiffies - sess->expires);
706 break;
707 }
708 }
709 spin_unlock_irqrestore(&ha->hardware_lock, flags);
710}
711
712/*
713 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
714 * Caller must put it.
715 */
716static struct qla_tgt_sess *qlt_create_sess(
717 struct scsi_qla_host *vha,
718 fc_port_t *fcport,
719 bool local)
720{
721 struct qla_hw_data *ha = vha->hw;
722 struct qla_tgt_sess *sess;
723 unsigned long flags;
724 unsigned char be_sid[3];
725
726 /* Check to avoid double sessions */
727 spin_lock_irqsave(&ha->hardware_lock, flags);
728 list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
729 sess_list_entry) {
730 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
732 "Double sess %p found (s_id %x:%x:%x, "
733 "loop_id %d), updating to d_id %x:%x:%x, "
734 "loop_id %d", sess, sess->s_id.b.domain,
735 sess->s_id.b.al_pa, sess->s_id.b.area,
736 sess->loop_id, fcport->d_id.b.domain,
737 fcport->d_id.b.al_pa, fcport->d_id.b.area,
738 fcport->loop_id);
739
740 if (sess->deleted)
741 qlt_undelete_sess(sess);
742
743 kref_get(&sess->se_sess->sess_kref);
c8292d1d
RD		 744 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
745 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
746
2d70c103
NB		 747 if (sess->local && !local)
748 sess->local = 0;
749 spin_unlock_irqrestore(&ha->hardware_lock, flags);
750
751 return sess;
752 }
753 }
754 spin_unlock_irqrestore(&ha->hardware_lock, flags);
755
756 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
757 if (!sess) {
758 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
759 "qla_target(%u): session allocation failed, "
760 "all commands from port %02x:%02x:%02x:%02x:"
761 "%02x:%02x:%02x:%02x will be refused", vha->vp_idx,
762 fcport->port_name[0], fcport->port_name[1],
763 fcport->port_name[2], fcport->port_name[3],
764 fcport->port_name[4], fcport->port_name[5],
765 fcport->port_name[6], fcport->port_name[7]);
766
767 return NULL;
768 }
769 sess->tgt = ha->tgt.qla_tgt;
770 sess->vha = vha;
771 sess->s_id = fcport->d_id;
772 sess->loop_id = fcport->loop_id;
773 sess->local = local;
774
775 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
776 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
777 sess, ha->tgt.qla_tgt);
778
779 be_sid[0] = sess->s_id.b.domain;
780 be_sid[1] = sess->s_id.b.area;
781 be_sid[2] = sess->s_id.b.al_pa;
782 /*
783 * Determine if this fc_port->port_name is allowed to access
784 * target mode using explict NodeACLs+MappedLUNs, or using
785 * TPG demo mode. If this is successful a target mode FC nexus
786 * is created.
787 */
788 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
789 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
790 kfree(sess);
791 return NULL;
792 }
793 /*
794 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
795 * access across ->hardware_lock reaquire.
796 */
797 kref_get(&sess->se_sess->sess_kref);
798
c8292d1d 799 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
2d70c103
NB		 800 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
801 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
802
803 spin_lock_irqsave(&ha->hardware_lock, flags);
804 list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
805 ha->tgt.qla_tgt->sess_count++;
806 spin_unlock_irqrestore(&ha->hardware_lock, flags);
807
808 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
809 "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:"
810 "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed"
811 " completion %ssupported) added\n",
812 vha->vp_idx, local ? "local " : "", fcport->port_name[0],
813 fcport->port_name[1], fcport->port_name[2], fcport->port_name[3],
814 fcport->port_name[4], fcport->port_name[5], fcport->port_name[6],
815 fcport->port_name[7], fcport->loop_id, sess->s_id.b.domain,
816 sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ?
817 "" : "not ");
818
819 return sess;
820}
821
822/*
823 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
824 */
825void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
826{
827 struct qla_hw_data *ha = vha->hw;
828 struct qla_tgt *tgt = ha->tgt.qla_tgt;
829 struct qla_tgt_sess *sess;
830 unsigned long flags;
831
832 if (!vha->hw->tgt.tgt_ops)
833 return;
834
835 if (!tgt || (fcport->port_type != FCT_INITIATOR))
836 return;
837
838 spin_lock_irqsave(&ha->hardware_lock, flags);
839 if (tgt->tgt_stop) {
840 spin_unlock_irqrestore(&ha->hardware_lock, flags);
841 return;
842 }
843 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
844 if (!sess) {
845 spin_unlock_irqrestore(&ha->hardware_lock, flags);
846
847 mutex_lock(&ha->tgt.tgt_mutex);
848 sess = qlt_create_sess(vha, fcport, false);
849 mutex_unlock(&ha->tgt.tgt_mutex);
850
851 spin_lock_irqsave(&ha->hardware_lock, flags);
852 } else {
853 kref_get(&sess->se_sess->sess_kref);
854
855 if (sess->deleted) {
856 qlt_undelete_sess(sess);
857
858 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
859 "qla_target(%u): %ssession for port %02x:"
860 "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) "
861 "reappeared\n", vha->vp_idx, sess->local ? "local "
862 : "", sess->port_name[0], sess->port_name[1],
863 sess->port_name[2], sess->port_name[3],
864 sess->port_name[4], sess->port_name[5],
865 sess->port_name[6], sess->port_name[7],
866 sess->loop_id);
867
868 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
869 "Reappeared sess %p\n", sess);
870 }
c8292d1d
RD		 871 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
872 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
2d70c103
NB		 873 }
874
875 if (sess && sess->local) {
876 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
877 "qla_target(%u): local session for "
878 "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
879 "(loop ID %d) became global\n", vha->vp_idx,
880 fcport->port_name[0], fcport->port_name[1],
881 fcport->port_name[2], fcport->port_name[3],
882 fcport->port_name[4], fcport->port_name[5],
883 fcport->port_name[6], fcport->port_name[7],
884 sess->loop_id);
885 sess->local = 0;
886 }
887 spin_unlock_irqrestore(&ha->hardware_lock, flags);
888
889 ha->tgt.tgt_ops->put_sess(sess);
890}
891
892void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
893{
894 struct qla_hw_data *ha = vha->hw;
895 struct qla_tgt *tgt = ha->tgt.qla_tgt;
896 struct qla_tgt_sess *sess;
897 unsigned long flags;
898
899 if (!vha->hw->tgt.tgt_ops)
900 return;
901
902 if (!tgt || (fcport->port_type != FCT_INITIATOR))
903 return;
904
905 spin_lock_irqsave(&ha->hardware_lock, flags);
906 if (tgt->tgt_stop) {
907 spin_unlock_irqrestore(&ha->hardware_lock, flags);
908 return;
909 }
910 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
911 if (!sess) {
912 spin_unlock_irqrestore(&ha->hardware_lock, flags);
913 return;
914 }
915
916 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
917
918 sess->local = 1;
919 qlt_schedule_sess_for_deletion(sess, false);
920 spin_unlock_irqrestore(&ha->hardware_lock, flags);
921}
922
923static inline int test_tgt_sess_count(struct qla_tgt *tgt)
924{
925 struct qla_hw_data *ha = tgt->ha;
926 unsigned long flags;
927 int res;
928 /*
929 * We need to protect against race, when tgt is freed before or
930 * inside wake_up()
931 */
932 spin_lock_irqsave(&ha->hardware_lock, flags);
933 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
934 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
935 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
936 res = (tgt->sess_count == 0);
937 spin_unlock_irqrestore(&ha->hardware_lock, flags);
938
939 return res;
940}
941
942/* Called by tcm_qla2xxx configfs code */
943void qlt_stop_phase1(struct qla_tgt *tgt)
944{
945 struct scsi_qla_host *vha = tgt->vha;
946 struct qla_hw_data *ha = tgt->ha;
947 unsigned long flags;
948
949 if (tgt->tgt_stop || tgt->tgt_stopped) {
950 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
951 "Already in tgt->tgt_stop or tgt_stopped state\n");
952 dump_stack();
953 return;
954 }
955
956 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
957 vha->host_no, vha);
958 /*
959 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
960 * Lock is needed, because we still can get an incoming packet.
961 */
962 mutex_lock(&ha->tgt.tgt_mutex);
963 spin_lock_irqsave(&ha->hardware_lock, flags);
964 tgt->tgt_stop = 1;
965 qlt_clear_tgt_db(tgt, true);
966 spin_unlock_irqrestore(&ha->hardware_lock, flags);
967 mutex_unlock(&ha->tgt.tgt_mutex);
968
43829731 969 flush_delayed_work(&tgt->sess_del_work);
2d70c103
NB		 970
971 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
972 "Waiting for sess works (tgt %p)", tgt);
973 spin_lock_irqsave(&tgt->sess_work_lock, flags);
974 while (!list_empty(&tgt->sess_works_list)) {
975 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
976 flush_scheduled_work();
977 spin_lock_irqsave(&tgt->sess_work_lock, flags);
978 }
979 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
980
981 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
982 "Waiting for tgt %p: list_empty(sess_list)=%d "
983 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
984 tgt->sess_count);
985
986 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
987
988 /* Big hammer */
989 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
990 qlt_disable_vha(vha);
991
992 /* Wait for sessions to clear out (just in case) */
993 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
994}
995EXPORT_SYMBOL(qlt_stop_phase1);
996
997/* Called by tcm_qla2xxx configfs code */
998void qlt_stop_phase2(struct qla_tgt *tgt)
999{
1000 struct qla_hw_data *ha = tgt->ha;
1001 unsigned long flags;
1002
1003 if (tgt->tgt_stopped) {
1004 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
1005 "Already in tgt->tgt_stopped state\n");
1006 dump_stack();
1007 return;
1008 }
1009
1010 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
1011 "Waiting for %d IRQ commands to complete (tgt %p)",
1012 tgt->irq_cmd_count, tgt);
1013
1014 mutex_lock(&ha->tgt.tgt_mutex);
1015 spin_lock_irqsave(&ha->hardware_lock, flags);
1016 while (tgt->irq_cmd_count != 0) {
1017 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1018 udelay(2);
1019 spin_lock_irqsave(&ha->hardware_lock, flags);
1020 }
1021 tgt->tgt_stop = 0;
1022 tgt->tgt_stopped = 1;
1023 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1024 mutex_unlock(&ha->tgt.tgt_mutex);
1025
1026 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
1027 tgt);
1028}
1029EXPORT_SYMBOL(qlt_stop_phase2);
1030
1031/* Called from qlt_remove_target() -> qla2x00_remove_one() */
1032void qlt_release(struct qla_tgt *tgt)
1033{
1034 struct qla_hw_data *ha = tgt->ha;
1035
1036 if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1037 qlt_stop_phase2(tgt);
1038
1039 ha->tgt.qla_tgt = NULL;
1040
1041 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
1042 "Release of tgt %p finished\n", tgt);
1043
1044 kfree(tgt);
1045}
1046
1047/* ha->hardware_lock supposed to be held on entry */
1048static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1049 const void *param, unsigned int param_size)
1050{
1051 struct qla_tgt_sess_work_param *prm;
1052 unsigned long flags;
1053
1054 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1055 if (!prm) {
1056 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1057 "qla_target(%d): Unable to create session "
1058 "work, command will be refused", 0);
1059 return -ENOMEM;
1060 }
1061
1062 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1063 "Scheduling work (type %d, prm %p)"
1064 " to find session for param %p (size %d, tgt %p)\n",
1065 type, prm, param, param_size, tgt);
1066
1067 prm->type = type;
1068 memcpy(&prm->tm_iocb, param, param_size);
1069
1070 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1071 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1072 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1073
1074 schedule_work(&tgt->sess_work);
1075
1076 return 0;
1077}
1078
1079/*
1080 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1081 */
1082static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1083 struct imm_ntfy_from_isp *ntfy,
1084 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1085 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1086{
1087 struct qla_hw_data *ha = vha->hw;
1088 request_t *pkt;
1089 struct nack_to_isp *nack;
1090
1091 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1092
1093 /* Send marker if required */
1094 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1095 return;
1096
1097 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1098 if (!pkt) {
1099 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1100 "qla_target(%d): %s failed: unable to allocate "
1101 "request packet\n", vha->vp_idx, __func__);
1102 return;
1103 }
1104
1105 if (ha->tgt.qla_tgt != NULL)
1106 ha->tgt.qla_tgt->notify_ack_expected++;
1107
1108 pkt->entry_type = NOTIFY_ACK_TYPE;
1109 pkt->entry_count = 1;
1110
1111 nack = (struct nack_to_isp *)pkt;
1112 nack->ox_id = ntfy->ox_id;
1113
1114 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1115 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1116 nack->u.isp24.flags = ntfy->u.isp24.flags &
1117 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1118 }
1119 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1120 nack->u.isp24.status = ntfy->u.isp24.status;
1121 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1122 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1123 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1124 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1125 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1126 nack->u.isp24.srr_reject_code = srr_reject_code;
1127 nack->u.isp24.srr_reject_code_expl = srr_explan;
1128 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1129
1130 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1131 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1132 vha->vp_idx, nack->u.isp24.status);
1133
1134 qla2x00_start_iocbs(vha, vha->req);
1135}
1136
1137/*
1138 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1139 */
1140static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1141 struct abts_recv_from_24xx *abts, uint32_t status,
1142 bool ids_reversed)
1143{
1144 struct qla_hw_data *ha = vha->hw;
1145 struct abts_resp_to_24xx *resp;
1146 uint32_t f_ctl;
1147 uint8_t *p;
1148
1149 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1150 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1151 ha, abts, status);
1152
1153 /* Send marker if required */
1154 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1155 return;
1156
1157 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1158 if (!resp) {
1159 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1160 "qla_target(%d): %s failed: unable to allocate "
1161 "request packet", vha->vp_idx, __func__);
1162 return;
1163 }
1164
1165 resp->entry_type = ABTS_RESP_24XX;
1166 resp->entry_count = 1;
1167 resp->nport_handle = abts->nport_handle;
1168 resp->vp_index = vha->vp_idx;
1169 resp->sof_type = abts->sof_type;
1170 resp->exchange_address = abts->exchange_address;
1171 resp->fcp_hdr_le = abts->fcp_hdr_le;
1172 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1173 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1174 F_CTL_SEQ_INITIATIVE);
1175 p = (uint8_t *)&f_ctl;
1176 resp->fcp_hdr_le.f_ctl[0] = *p++;
1177 resp->fcp_hdr_le.f_ctl[1] = *p++;
1178 resp->fcp_hdr_le.f_ctl[2] = *p;
1179 if (ids_reversed) {
1180 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1181 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1182 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1183 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1184 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1185 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1186 } else {
1187 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1188 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1189 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1190 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1191 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1192 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1193 }
1194 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1195 if (status == FCP_TMF_CMPL) {
1196 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1197 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1198 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1199 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1200 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1201 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1202 } else {
1203 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1204 resp->payload.ba_rjt.reason_code =
1205 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1206 /* Other bytes are zero */
1207 }
1208
1209 ha->tgt.qla_tgt->abts_resp_expected++;
1210
1211 qla2x00_start_iocbs(vha, vha->req);
1212}
1213
1214/*
1215 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1216 */
1217static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1218 struct abts_resp_from_24xx_fw *entry)
1219{
1220 struct ctio7_to_24xx *ctio;
1221
1222 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1223 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1224 /* Send marker if required */
1225 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1226 return;
1227
1228 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1229 if (ctio == NULL) {
1230 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1231 "qla_target(%d): %s failed: unable to allocate "
1232 "request packet\n", vha->vp_idx, __func__);
1233 return;
1234 }
1235
1236 /*
1237 * We've got on entrance firmware's response on by us generated
1238 * ABTS response. So, in it ID fields are reversed.
1239 */
1240
1241 ctio->entry_type = CTIO_TYPE7;
1242 ctio->entry_count = 1;
1243 ctio->nport_handle = entry->nport_handle;
1244 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1245 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1246 ctio->vp_index = vha->vp_idx;
1247 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1248 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1249 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1250 ctio->exchange_addr = entry->exchange_addr_to_abort;
1251 ctio->u.status1.flags =
1252 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1253 CTIO7_FLAGS_TERMINATE);
1254 ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1255
1256 qla2x00_start_iocbs(vha, vha->req);
1257
1258 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1259 FCP_TMF_CMPL, true);
1260}
1261
1262/* ha->hardware_lock supposed to be held on entry */
1263static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1264 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1265{
1266 struct qla_hw_data *ha = vha->hw;
1267 struct qla_tgt_mgmt_cmd *mcmd;
1268 int rc;
1269
1270 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1271 "qla_target(%d): task abort (tag=%d)\n",
1272 vha->vp_idx, abts->exchange_addr_to_abort);
1273
1274 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1275 if (mcmd == NULL) {
1276 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1277 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1278 vha->vp_idx, __func__);
1279 return -ENOMEM;
1280 }
1281 memset(mcmd, 0, sizeof(*mcmd));
1282
1283 mcmd->sess = sess;
1284 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1285
1286 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, TMR_ABORT_TASK,
1287 abts->exchange_addr_to_abort);
1288 if (rc != 0) {
1289 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1290 "qla_target(%d): tgt_ops->handle_tmr()"
1291 " failed: %d", vha->vp_idx, rc);
1292 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1293 return -EFAULT;
1294 }
1295
1296 return 0;
1297}
1298
1299/*
1300 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1301 */
1302static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1303 struct abts_recv_from_24xx *abts)
1304{
1305 struct qla_hw_data *ha = vha->hw;
1306 struct qla_tgt_sess *sess;
1307 uint32_t tag = abts->exchange_addr_to_abort;
1308 uint8_t s_id[3];
1309 int rc;
1310
1311 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1312 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1313 "qla_target(%d): ABTS: Abort Sequence not "
1314 "supported\n", vha->vp_idx);
1315 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1316 return;
1317 }
1318
1319 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1320 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1321 "qla_target(%d): ABTS: Unknown Exchange "
1322 "Address received\n", vha->vp_idx);
1323 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1324 return;
1325 }
1326
1327 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1328 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1329 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1330 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1331 le32_to_cpu(abts->fcp_hdr_le.parameter));
1332
1333 s_id[0] = abts->fcp_hdr_le.s_id[2];
1334 s_id[1] = abts->fcp_hdr_le.s_id[1];
1335 s_id[2] = abts->fcp_hdr_le.s_id[0];
1336
1337 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1338 if (!sess) {
1339 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1340 "qla_target(%d): task abort for non-existant session\n",
1341 vha->vp_idx);
1342 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1343 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1344 if (rc != 0) {
1345 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1346 false);
1347 }
1348 return;
1349 }
1350
1351 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1352 if (rc != 0) {
1353 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1354 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1355 vha->vp_idx, rc);
1356 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1357 return;
1358 }
1359}
1360
1361/*
1362 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1363 */
1364static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1365 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1366{
1367 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1368 struct ctio7_to_24xx *ctio;
1369
1370 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1371 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1372 ha, atio, resp_code);
1373
1374 /* Send marker if required */
1375 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1376 return;
1377
1378 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1379 if (ctio == NULL) {
1380 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1381 "qla_target(%d): %s failed: unable to allocate "
1382 "request packet\n", ha->vp_idx, __func__);
1383 return;
1384 }
1385
1386 ctio->entry_type = CTIO_TYPE7;
1387 ctio->entry_count = 1;
1388 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1389 ctio->nport_handle = mcmd->sess->loop_id;
1390 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1391 ctio->vp_index = ha->vp_idx;
1392 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1393 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1394 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1395 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1396 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1397 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1398 CTIO7_FLAGS_SEND_STATUS);
1399 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1400 ctio->u.status1.scsi_status =
1401 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1402 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
e4b11b89 1403 ctio->u.status1.sense_data[0] = resp_code;
2d70c103
NB		 1404
1405 qla2x00_start_iocbs(ha, ha->req);
1406}
1407
1408void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1409{
1410 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1411}
1412EXPORT_SYMBOL(qlt_free_mcmd);
1413
1414/* callback from target fabric module code */
1415void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1416{
1417 struct scsi_qla_host *vha = mcmd->sess->vha;
1418 struct qla_hw_data *ha = vha->hw;
1419 unsigned long flags;
1420
1421 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1422 "TM response mcmd (%p) status %#x state %#x",
1423 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1424
1425 spin_lock_irqsave(&ha->hardware_lock, flags);
1426 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1427 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1428 0, 0, 0, 0, 0, 0);
1429 else {
1430 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1431 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1432 mcmd->fc_tm_rsp, false);
1433 else
1434 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1435 mcmd->fc_tm_rsp);
1436 }
1437 /*
1438 * Make the callback for ->free_mcmd() to queue_work() and invoke
1439 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1440 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1441 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1442 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1443 * qlt_xmit_tm_rsp() returns here..
1444 */
1445 ha->tgt.tgt_ops->free_mcmd(mcmd);
1446 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1447}
1448EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1449
1450/* No locks */
1451static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1452{
1453 struct qla_tgt_cmd *cmd = prm->cmd;
1454
1455 BUG_ON(cmd->sg_cnt == 0);
1456
1457 prm->sg = (struct scatterlist *)cmd->sg;
1458 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1459 cmd->sg_cnt, cmd->dma_data_direction);
1460 if (unlikely(prm->seg_cnt == 0))
1461 goto out_err;
1462
1463 prm->cmd->sg_mapped = 1;
1464
1465 /*
1466 * If greater than four sg entries then we need to allocate
1467 * the continuation entries
1468 */
1469 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1470 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1471 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1472
1473 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1474 prm->seg_cnt, prm->req_cnt);
1475 return 0;
1476
1477out_err:
1478 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1479 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1480 0, prm->cmd->sg_cnt);
1481 return -1;
1482}
1483
1484static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1485 struct qla_tgt_cmd *cmd)
1486{
1487 struct qla_hw_data *ha = vha->hw;
1488
1489 BUG_ON(!cmd->sg_mapped);
1490 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1491 cmd->sg_mapped = 0;
1492}
1493
1494static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1495 uint32_t req_cnt)
1496{
1497 struct qla_hw_data *ha = vha->hw;
1498 device_reg_t __iomem *reg = ha->iobase;
1499 uint32_t cnt;
1500
1501 if (vha->req->cnt < (req_cnt + 2)) {
1502 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1503
1504 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1505 "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1506 "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1507 vha->req->ring_index, vha->req->cnt, req_cnt);
1508 if (vha->req->ring_index < cnt)
1509 vha->req->cnt = cnt - vha->req->ring_index;
1510 else
1511 vha->req->cnt = vha->req->length -
1512 (vha->req->ring_index - cnt);
1513 }
1514
1515 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1516 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1517 "qla_target(%d): There is no room in the "
1518 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1519 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1520 vha->req->cnt, req_cnt);
1521 return -EAGAIN;
1522 }
1523 vha->req->cnt -= req_cnt;
1524
1525 return 0;
1526}
1527
1528/*
1529 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1530 */
1531static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1532{
1533 /* Adjust ring index. */
1534 vha->req->ring_index++;
1535 if (vha->req->ring_index == vha->req->length) {
1536 vha->req->ring_index = 0;
1537 vha->req->ring_ptr = vha->req->ring;
1538 } else {
1539 vha->req->ring_ptr++;
1540 }
1541 return (cont_entry_t *)vha->req->ring_ptr;
1542}
1543
1544/* ha->hardware_lock supposed to be held on entry */
1545static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1546{
1547 struct qla_hw_data *ha = vha->hw;
1548 uint32_t h;
1549
1550 h = ha->tgt.current_handle;
1551 /* always increment cmd handle */
1552 do {
1553 ++h;
1554 if (h > MAX_OUTSTANDING_COMMANDS)
1555 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1556 if (h == ha->tgt.current_handle) {
1557 ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1558 "qla_target(%d): Ran out of "
1559 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1560 h = QLA_TGT_NULL_HANDLE;
1561 break;
1562 }
1563 } while ((h == QLA_TGT_NULL_HANDLE) ||
1564 (h == QLA_TGT_SKIP_HANDLE) ||
1565 (ha->tgt.cmds[h-1] != NULL));
1566
1567 if (h != QLA_TGT_NULL_HANDLE)
1568 ha->tgt.current_handle = h;
1569
1570 return h;
1571}
1572
1573/* ha->hardware_lock supposed to be held on entry */
1574static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1575 struct scsi_qla_host *vha)
1576{
1577 uint32_t h;
1578 struct ctio7_to_24xx *pkt;
1579 struct qla_hw_data *ha = vha->hw;
1580 struct atio_from_isp *atio = &prm->cmd->atio;
1581
1582 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1583 prm->pkt = pkt;
1584 memset(pkt, 0, sizeof(*pkt));
1585
1586 pkt->entry_type = CTIO_TYPE7;
1587 pkt->entry_count = (uint8_t)prm->req_cnt;
1588 pkt->vp_index = vha->vp_idx;
1589
1590 h = qlt_make_handle(vha);
1591 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1592 /*
1593 * CTIO type 7 from the firmware doesn't provide a way to
1594 * know the initiator's LOOP ID, hence we can't find
1595 * the session and, so, the command.
1596 */
1597 return -EAGAIN;
1598 } else
1599 ha->tgt.cmds[h-1] = prm->cmd;
1600
1601 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1602 pkt->nport_handle = prm->cmd->loop_id;
1603 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1604 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1605 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1606 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1607 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1608 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1609 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1610 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1611
1612 ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1613 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1614 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1615 le16_to_cpu(pkt->u.status0.ox_id));
1616 return 0;
1617}
1618
1619/*
1620 * ha->hardware_lock supposed to be held on entry. We have already made sure
1621 * that there is sufficient amount of request entries to not drop it.
1622 */
1623static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1624 struct scsi_qla_host *vha)
1625{
1626 int cnt;
1627 uint32_t *dword_ptr;
1628 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1629
1630 /* Build continuation packets */
1631 while (prm->seg_cnt > 0) {
1632 cont_a64_entry_t *cont_pkt64 =
1633 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1634
1635 /*
1636 * Make sure that from cont_pkt64 none of
1637 * 64-bit specific fields used for 32-bit
1638 * addressing. Cast to (cont_entry_t *) for
1639 * that.
1640 */
1641
1642 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1643
1644 cont_pkt64->entry_count = 1;
1645 cont_pkt64->sys_define = 0;
1646
1647 if (enable_64bit_addressing) {
1648 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1649 dword_ptr =
1650 (uint32_t *)&cont_pkt64->dseg_0_address;
1651 } else {
1652 cont_pkt64->entry_type = CONTINUE_TYPE;
1653 dword_ptr =
1654 (uint32_t *)&((cont_entry_t *)
1655 cont_pkt64)->dseg_0_address;
1656 }
1657
1658 /* Load continuation entry data segments */
1659 for (cnt = 0;
1660 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1661 cnt++, prm->seg_cnt--) {
1662 *dword_ptr++ =
1663 cpu_to_le32(pci_dma_lo32
1664 (sg_dma_address(prm->sg)));
1665 if (enable_64bit_addressing) {
1666 *dword_ptr++ =
1667 cpu_to_le32(pci_dma_hi32
1668 (sg_dma_address
1669 (prm->sg)));
1670 }
1671 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1672
1673 ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1674 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1675 (long long unsigned int)
1676 pci_dma_hi32(sg_dma_address(prm->sg)),
1677 (long long unsigned int)
1678 pci_dma_lo32(sg_dma_address(prm->sg)),
1679 (int)sg_dma_len(prm->sg));
1680
1681 prm->sg = sg_next(prm->sg);
1682 }
1683 }
1684}
1685
1686/*
1687 * ha->hardware_lock supposed to be held on entry. We have already made sure
1688 * that there is sufficient amount of request entries to not drop it.
1689 */
1690static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1691 struct scsi_qla_host *vha)
1692{
1693 int cnt;
1694 uint32_t *dword_ptr;
1695 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1696 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1697
1698 ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1699 "iocb->scsi_status=%x, iocb->flags=%x\n",
1700 le16_to_cpu(pkt24->u.status0.scsi_status),
1701 le16_to_cpu(pkt24->u.status0.flags));
1702
1703 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1704
1705 /* Setup packet address segment pointer */
1706 dword_ptr = pkt24->u.status0.dseg_0_address;
1707
1708 /* Set total data segment count */
1709 if (prm->seg_cnt)
1710 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1711
1712 if (prm->seg_cnt == 0) {
1713 /* No data transfer */
1714 *dword_ptr++ = 0;
1715 *dword_ptr = 0;
1716 return;
1717 }
1718
1719 /* If scatter gather */
1720 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1721
1722 /* Load command entry data segments */
1723 for (cnt = 0;
1724 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1725 cnt++, prm->seg_cnt--) {
1726 *dword_ptr++ =
1727 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1728 if (enable_64bit_addressing) {
1729 *dword_ptr++ =
1730 cpu_to_le32(pci_dma_hi32(
1731 sg_dma_address(prm->sg)));
1732 }
1733 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1734
1735 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1736 "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1737 (long long unsigned int)pci_dma_hi32(sg_dma_address(
1738 prm->sg)),
1739 (long long unsigned int)pci_dma_lo32(sg_dma_address(
1740 prm->sg)),
1741 (int)sg_dma_len(prm->sg));
1742
1743 prm->sg = sg_next(prm->sg);
1744 }
1745
1746 qlt_load_cont_data_segments(prm, vha);
1747}
1748
1749static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1750{
1751 return cmd->bufflen > 0;
1752}
1753
1754/*
1755 * Called without ha->hardware_lock held
1756 */
1757static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1758 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1759 uint32_t *full_req_cnt)
1760{
1761 struct qla_tgt *tgt = cmd->tgt;
1762 struct scsi_qla_host *vha = tgt->vha;
1763 struct qla_hw_data *ha = vha->hw;
1764 struct se_cmd *se_cmd = &cmd->se_cmd;
1765
1766 if (unlikely(cmd->aborted)) {
1767 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1768 "qla_target(%d): terminating exchange "
1769 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1770 se_cmd, cmd->tag);
1771
1772 cmd->state = QLA_TGT_STATE_ABORTED;
1773
1774 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1775
1776 /* !! At this point cmd could be already freed !! */
1777 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1778 }
1779
1780 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1781 vha->vp_idx, cmd->tag);
1782
1783 prm->cmd = cmd;
1784 prm->tgt = tgt;
1785 prm->rq_result = scsi_status;
1786 prm->sense_buffer = &cmd->sense_buffer[0];
1787 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1788 prm->sg = NULL;
1789 prm->seg_cnt = -1;
1790 prm->req_cnt = 1;
1791 prm->add_status_pkt = 0;
1792
1793 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1794 prm->rq_result, xmit_type);
1795
1796 /* Send marker if required */
1797 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1798 return -EFAULT;
1799
1800 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1801
1802 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1803 if (qlt_pci_map_calc_cnt(prm) != 0)
1804 return -EAGAIN;
1805 }
1806
1807 *full_req_cnt = prm->req_cnt;
1808
1809 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1810 prm->residual = se_cmd->residual_count;
1811 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1812 "Residual underflow: %d (tag %d, "
1813 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1814 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1815 cmd->bufflen, prm->rq_result);
1816 prm->rq_result |= SS_RESIDUAL_UNDER;
1817 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1818 prm->residual = se_cmd->residual_count;
1819 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1820 "Residual overflow: %d (tag %d, "
1821 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1822 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1823 cmd->bufflen, prm->rq_result);
1824 prm->rq_result |= SS_RESIDUAL_OVER;
1825 }
1826
1827 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1828 /*
1829 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1830 * ignored in *xmit_response() below
1831 */
1832 if (qlt_has_data(cmd)) {
1833 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1834 (IS_FWI2_CAPABLE(ha) &&
1835 (prm->rq_result != 0))) {
1836 prm->add_status_pkt = 1;
1837 (*full_req_cnt)++;
1838 }
1839 }
1840 }
1841
1842 ql_dbg(ql_dbg_tgt, vha, 0xe016,
1843 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1844 prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1845
1846 return 0;
1847}
1848
1849static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1850 struct qla_tgt_cmd *cmd, int sending_sense)
1851{
1852 if (ha->tgt.enable_class_2)
1853 return 0;
1854
1855 if (sending_sense)
1856 return cmd->conf_compl_supported;
1857 else
1858 return ha->tgt.enable_explicit_conf &&
1859 cmd->conf_compl_supported;
1860}
1861
1862#ifdef CONFIG_QLA_TGT_DEBUG_SRR
1863/*
1864 * Original taken from the XFS code
1865 */
1866static unsigned long qlt_srr_random(void)
1867{
1868 static int Inited;
1869 static unsigned long RandomValue;
1870 static DEFINE_SPINLOCK(lock);
1871 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1872 register long rv;
1873 register long lo;
1874 register long hi;
1875 unsigned long flags;
1876
1877 spin_lock_irqsave(&lock, flags);
1878 if (!Inited) {
1879 RandomValue = jiffies;
1880 Inited = 1;
1881 }
1882 rv = RandomValue;
1883 hi = rv / 127773;
1884 lo = rv % 127773;
1885 rv = 16807 * lo - 2836 * hi;
1886 if (rv <= 0)
1887 rv += 2147483647;
1888 RandomValue = rv;
1889 spin_unlock_irqrestore(&lock, flags);
1890 return rv;
1891}
1892
1893static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1894{
1895#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1896 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1897 == 50) {
1898 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1899 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1900 "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1901 }
1902#endif
1903 /*
1904 * It's currently not possible to simulate SRRs for FCP_WRITE without
1905 * a physical link layer failure, so don't even try here..
1906 */
1907 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1908 return;
1909
1910 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1911 ((qlt_srr_random() % 100) == 20)) {
1912 int i, leave = 0;
1913 unsigned int tot_len = 0;
1914
1915 while (leave == 0)
1916 leave = qlt_srr_random() % cmd->sg_cnt;
1917
1918 for (i = 0; i < leave; i++)
1919 tot_len += cmd->sg[i].length;
1920
1921 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1922 "Cutting cmd %p (tag %d) buffer"
1923 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1924 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1925 cmd->bufflen, cmd->sg_cnt);
1926
1927 cmd->bufflen = tot_len;
1928 cmd->sg_cnt = leave;
1929 }
1930
1931 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1932 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1933
1934 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1935 "Cutting cmd %p (tag %d) buffer head "
1936 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1937 cmd->bufflen);
1938 if (offset == 0)
1939 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1940 else if (qlt_set_data_offset(cmd, offset)) {
1941 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1942 "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1943 }
1944 }
1945}
1946#else
1947static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1948{}
1949#endif
1950
1951static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1952 struct qla_tgt_prm *prm)
1953{
1954 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1955 (uint32_t)sizeof(ctio->u.status1.sense_data));
1956 ctio->u.status0.flags |=
1957 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1958 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1959 ctio->u.status0.flags |= __constant_cpu_to_le16(
1960 CTIO7_FLAGS_EXPLICIT_CONFORM |
1961 CTIO7_FLAGS_CONFORM_REQ);
1962 }
1963 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1964 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1965 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1966 int i;
1967
1968 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1969 if (prm->cmd->se_cmd.scsi_status != 0) {
1970 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1971 "Skipping EXPLICIT_CONFORM and "
1972 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1973 "non GOOD status\n");
1974 goto skip_explict_conf;
1975 }
1976 ctio->u.status1.flags |= __constant_cpu_to_le16(
1977 CTIO7_FLAGS_EXPLICIT_CONFORM |
1978 CTIO7_FLAGS_CONFORM_REQ);
1979 }
1980skip_explict_conf:
1981 ctio->u.status1.flags &=
1982 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1983 ctio->u.status1.flags |=
1984 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1985 ctio->u.status1.scsi_status |=
1986 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1987 ctio->u.status1.sense_length =
1988 cpu_to_le16(prm->sense_buffer_len);
1989 for (i = 0; i < prm->sense_buffer_len/4; i++)
1990 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1991 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1992#if 0
1993 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1994 static int q;
1995 if (q < 10) {
1996 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1997 "qla_target(%d): %d bytes of sense "
1998 "lost", prm->tgt->ha->vp_idx,
1999 prm->sense_buffer_len % 4);
2000 q++;
2001 }
2002 }
2003#endif
2004 } else {
2005 ctio->u.status1.flags &=
2006 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2007 ctio->u.status1.flags |=
2008 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2009 ctio->u.status1.sense_length = 0;
2010 memset(ctio->u.status1.sense_data, 0,
2011 sizeof(ctio->u.status1.sense_data));
2012 }
2013
2014 /* Sense with len > 24, is it possible ??? */
2015}
2016
2017/*
2018 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2019 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2020 */
2021int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2022 uint8_t scsi_status)
2023{
2024 struct scsi_qla_host *vha = cmd->vha;
2025 struct qla_hw_data *ha = vha->hw;
2026 struct ctio7_to_24xx *pkt;
2027 struct qla_tgt_prm prm;
2028 uint32_t full_req_cnt = 0;
2029 unsigned long flags = 0;
2030 int res;
2031
2032 memset(&prm, 0, sizeof(prm));
2033 qlt_check_srr_debug(cmd, &xmit_type);
2034
2035 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2036 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
2037 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
2038 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
2039
2040 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2041 &full_req_cnt);
2042 if (unlikely(res != 0)) {
2043 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2044 return 0;
2045
2046 return res;
2047 }
2048
2049 spin_lock_irqsave(&ha->hardware_lock, flags);
2050
2051 /* Does F/W have an IOCBs for this request */
2052 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2053 if (unlikely(res))
2054 goto out_unmap_unlock;
2055
2056 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2057 if (unlikely(res != 0))
2058 goto out_unmap_unlock;
2059
2060
2061 pkt = (struct ctio7_to_24xx *)prm.pkt;
2062
2063 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2064 pkt->u.status0.flags |=
2065 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2066 CTIO7_FLAGS_STATUS_MODE_0);
2067
2068 qlt_load_data_segments(&prm, vha);
2069
2070 if (prm.add_status_pkt == 0) {
2071 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2072 pkt->u.status0.scsi_status =
2073 cpu_to_le16(prm.rq_result);
2074 pkt->u.status0.residual =
2075 cpu_to_le32(prm.residual);
2076 pkt->u.status0.flags |= __constant_cpu_to_le16(
2077 CTIO7_FLAGS_SEND_STATUS);
2078 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2079 pkt->u.status0.flags |=
2080 __constant_cpu_to_le16(
2081 CTIO7_FLAGS_EXPLICIT_CONFORM |
2082 CTIO7_FLAGS_CONFORM_REQ);
2083 }
2084 }
2085
2086 } else {
2087 /*
2088 * We have already made sure that there is sufficient
2089 * amount of request entries to not drop HW lock in
2090 * req_pkt().
2091 */
2092 struct ctio7_to_24xx *ctio =
2093 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2094
2095 ql_dbg(ql_dbg_tgt, vha, 0xe019,
2096 "Building additional status packet\n");
2097
2098 memcpy(ctio, pkt, sizeof(*ctio));
2099 ctio->entry_count = 1;
2100 ctio->dseg_count = 0;
2101 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2102 CTIO7_FLAGS_DATA_IN);
2103
2104 /* Real finish is ctio_m1's finish */
2105 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2106 pkt->u.status0.flags |= __constant_cpu_to_le16(
2107 CTIO7_FLAGS_DONT_RET_CTIO);
2108 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2109 &prm);
2110 pr_debug("Status CTIO7: %p\n", ctio);
2111 }
2112 } else
2113 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2114
2115
2116 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2117
2118 ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2119 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2120 pkt, scsi_status);
2121
2122 qla2x00_start_iocbs(vha, vha->req);
2123 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2124
2125 return 0;
2126
2127out_unmap_unlock:
2128 if (cmd->sg_mapped)
2129 qlt_unmap_sg(vha, cmd);
2130 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2131
2132 return res;
2133}
2134EXPORT_SYMBOL(qlt_xmit_response);
2135
2136int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2137{
2138 struct ctio7_to_24xx *pkt;
2139 struct scsi_qla_host *vha = cmd->vha;
2140 struct qla_hw_data *ha = vha->hw;
2141 struct qla_tgt *tgt = cmd->tgt;
2142 struct qla_tgt_prm prm;
2143 unsigned long flags;
2144 int res = 0;
2145
2146 memset(&prm, 0, sizeof(prm));
2147 prm.cmd = cmd;
2148 prm.tgt = tgt;
2149 prm.sg = NULL;
2150 prm.req_cnt = 1;
2151
2152 /* Send marker if required */
2153 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2154 return -EIO;
2155
2156 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2157 (int)vha->vp_idx);
2158
2159 /* Calculate number of entries and segments required */
2160 if (qlt_pci_map_calc_cnt(&prm) != 0)
2161 return -EAGAIN;
2162
2163 spin_lock_irqsave(&ha->hardware_lock, flags);
2164
2165 /* Does F/W have an IOCBs for this request */
2166 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2167 if (res != 0)
2168 goto out_unlock_free_unmap;
2169
2170 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2171 if (unlikely(res != 0))
2172 goto out_unlock_free_unmap;
2173 pkt = (struct ctio7_to_24xx *)prm.pkt;
2174 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2175 CTIO7_FLAGS_STATUS_MODE_0);
2176 qlt_load_data_segments(&prm, vha);
2177
2178 cmd->state = QLA_TGT_STATE_NEED_DATA;
2179
2180 qla2x00_start_iocbs(vha, vha->req);
2181 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2182
2183 return res;
2184
2185out_unlock_free_unmap:
2186 if (cmd->sg_mapped)
2187 qlt_unmap_sg(vha, cmd);
2188 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2189
2190 return res;
2191}
2192EXPORT_SYMBOL(qlt_rdy_to_xfer);
2193
2194/* If hardware_lock held on entry, might drop it, then reaquire */
2195/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2196static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2197 struct qla_tgt_cmd *cmd,
2198 struct atio_from_isp *atio)
2199{
2200 struct ctio7_to_24xx *ctio24;
2201 struct qla_hw_data *ha = vha->hw;
2202 request_t *pkt;
2203 int ret = 0;
2204
2205 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2206
2207 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2208 if (pkt == NULL) {
2209 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2210 "qla_target(%d): %s failed: unable to allocate "
2211 "request packet\n", vha->vp_idx, __func__);
2212 return -ENOMEM;
2213 }
2214
2215 if (cmd != NULL) {
2216 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2217 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2218 "qla_target(%d): Terminating cmd %p with "
2219 "incorrect state %d\n", vha->vp_idx, cmd,
2220 cmd->state);
2221 } else
2222 ret = 1;
2223 }
2224
2225 pkt->entry_count = 1;
2226 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2227
2228 ctio24 = (struct ctio7_to_24xx *)pkt;
2229 ctio24->entry_type = CTIO_TYPE7;
2230 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2231 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2232 ctio24->vp_index = vha->vp_idx;
2233 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2234 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2235 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2236 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2237 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2238 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2239 CTIO7_FLAGS_TERMINATE);
2240 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2241
2242 /* Most likely, it isn't needed */
2243 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2244 &atio->u.isp24.fcp_cmnd.add_cdb[
2245 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2246 if (ctio24->u.status1.residual != 0)
2247 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2248
2249 qla2x00_start_iocbs(vha, vha->req);
2250 return ret;
2251}
2252
2253static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2254 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2255{
2256 unsigned long flags;
2257 int rc;
2258
2259 if (qlt_issue_marker(vha, ha_locked) < 0)
2260 return;
2261
2262 if (ha_locked) {
2263 rc = __qlt_send_term_exchange(vha, cmd, atio);
2264 goto done;
2265 }
2266 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2267 rc = __qlt_send_term_exchange(vha, cmd, atio);
2268 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2269done:
2270 if (rc == 1) {
2271 if (!ha_locked && !in_interrupt())
2272 msleep(250); /* just in case */
2273
2274 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2275 }
2276}
2277
2278void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2279{
2280 BUG_ON(cmd->sg_mapped);
2281
2282 if (unlikely(cmd->free_sg))
2283 kfree(cmd->sg);
2284 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2285}
2286EXPORT_SYMBOL(qlt_free_cmd);
2287
2288/* ha->hardware_lock supposed to be held on entry */
2289static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2290 struct qla_tgt_cmd *cmd, void *ctio)
2291{
2292 struct qla_tgt_srr_ctio *sc;
2293 struct qla_hw_data *ha = vha->hw;
2294 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2295 struct qla_tgt_srr_imm *imm;
2296
2297 tgt->ctio_srr_id++;
2298
2299 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2300 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2301
2302 if (!ctio) {
2303 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2304 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2305 vha->vp_idx);
2306 return -EINVAL;
2307 }
2308
2309 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2310 if (sc != NULL) {
2311 sc->cmd = cmd;
2312 /* IRQ is already OFF */
2313 spin_lock(&tgt->srr_lock);
2314 sc->srr_id = tgt->ctio_srr_id;
2315 list_add_tail(&sc->srr_list_entry,
2316 &tgt->srr_ctio_list);
2317 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2318 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2319 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2320 int found = 0;
2321 list_for_each_entry(imm, &tgt->srr_imm_list,
2322 srr_list_entry) {
2323 if (imm->srr_id == sc->srr_id) {
2324 found = 1;
2325 break;
2326 }
2327 }
2328 if (found) {
2329 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2330 "Scheduling srr work\n");
2331 schedule_work(&tgt->srr_work);
2332 } else {
2333 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2334 "qla_target(%d): imm_srr_id "
2335 "== ctio_srr_id (%d), but there is no "
2336 "corresponding SRR IMM, deleting CTIO "
2337 "SRR %p\n", vha->vp_idx,
2338 tgt->ctio_srr_id, sc);
2339 list_del(&sc->srr_list_entry);
2340 spin_unlock(&tgt->srr_lock);
2341
2342 kfree(sc);
2343 return -EINVAL;
2344 }
2345 }
2346 spin_unlock(&tgt->srr_lock);
2347 } else {
2348 struct qla_tgt_srr_imm *ti;
2349
2350 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2351 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2352 vha->vp_idx);
2353 spin_lock(&tgt->srr_lock);
2354 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2355 srr_list_entry) {
2356 if (imm->srr_id == tgt->ctio_srr_id) {
2357 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2358 "IMM SRR %p deleted (id %d)\n",
2359 imm, imm->srr_id);
2360 list_del(&imm->srr_list_entry);
2361 qlt_reject_free_srr_imm(vha, imm, 1);
2362 }
2363 }
2364 spin_unlock(&tgt->srr_lock);
2365
2366 return -ENOMEM;
2367 }
2368
2369 return 0;
2370}
2371
2372/*
2373 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2374 */
2375static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2376 struct qla_tgt_cmd *cmd, uint32_t status)
2377{
2378 int term = 0;
2379
2380 if (ctio != NULL) {
2381 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2382 term = !(c->flags &
2383 __constant_cpu_to_le16(OF_TERM_EXCH));
2384 } else
2385 term = 1;
2386
2387 if (term)
2388 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2389
2390 return term;
2391}
2392
2393/* ha->hardware_lock supposed to be held on entry */
2394static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2395 uint32_t handle)
2396{
2397 struct qla_hw_data *ha = vha->hw;
2398
2399 handle--;
2400 if (ha->tgt.cmds[handle] != NULL) {
2401 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2402 ha->tgt.cmds[handle] = NULL;
2403 return cmd;
2404 } else
2405 return NULL;
2406}
2407
2408/* ha->hardware_lock supposed to be held on entry */
2409static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2410 uint32_t handle, void *ctio)
2411{
2412 struct qla_tgt_cmd *cmd = NULL;
2413
2414 /* Clear out internal marks */
2415 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2416 CTIO_INTERMEDIATE_HANDLE_MARK);
2417
2418 if (handle != QLA_TGT_NULL_HANDLE) {
2419 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2420 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2421 "SKIP_HANDLE CTIO\n");
2422 return NULL;
2423 }
2424 /* handle-1 is actually used */
2425 if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) {
2426 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2427 "qla_target(%d): Wrong handle %x received\n",
2428 vha->vp_idx, handle);
2429 return NULL;
2430 }
2431 cmd = qlt_get_cmd(vha, handle);
2432 if (unlikely(cmd == NULL)) {
2433 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2434 "qla_target(%d): Suspicious: unable to "
2435 "find the command with handle %x\n", vha->vp_idx,
2436 handle);
2437 return NULL;
2438 }
2439 } else if (ctio != NULL) {
2440 /* We can't get loop ID from CTIO7 */
2441 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2442 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2443 "support NULL handles\n", vha->vp_idx);
2444 return NULL;
2445 }
2446
2447 return cmd;
2448}
2449
2450/*
2451 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2452 */
2453static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2454 uint32_t status, void *ctio)
2455{
2456 struct qla_hw_data *ha = vha->hw;
2457 struct se_cmd *se_cmd;
2458 struct target_core_fabric_ops *tfo;
2459 struct qla_tgt_cmd *cmd;
2460
2461 ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2462 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2463 vha->vp_idx, ctio, status, handle);
2464
2465 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2466 /* That could happen only in case of an error/reset/abort */
2467 if (status != CTIO_SUCCESS) {
2468 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2469 "Intermediate CTIO received"
2470 " (status %x)\n", status);
2471 }
2472 return;
2473 }
2474
2475 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
092e1dc3 2476 if (cmd == NULL)
2d70c103 2477 return;
092e1dc3 2478
2d70c103
NB		 2479 se_cmd = &cmd->se_cmd;
2480 tfo = se_cmd->se_tfo;
2481
2482 if (cmd->sg_mapped)
2483 qlt_unmap_sg(vha, cmd);
2484
2485 if (unlikely(status != CTIO_SUCCESS)) {
2486 switch (status & 0xFFFF) {
2487 case CTIO_LIP_RESET:
2488 case CTIO_TARGET_RESET:
2489 case CTIO_ABORTED:
2490 case CTIO_TIMEOUT:
2491 case CTIO_INVALID_RX_ID:
2492 /* They are OK */
2493 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2494 "qla_target(%d): CTIO with "
2495 "status %#x received, state %x, se_cmd %p, "
2496 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2497 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2498 status, cmd->state, se_cmd);
2499 break;
2500
2501 case CTIO_PORT_LOGGED_OUT:
2502 case CTIO_PORT_UNAVAILABLE:
2503 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2504 "qla_target(%d): CTIO with PORT LOGGED "
2505 "OUT (29) or PORT UNAVAILABLE (28) status %x "
2506 "received (state %x, se_cmd %p)\n", vha->vp_idx,
2507 status, cmd->state, se_cmd);
2508 break;
2509
2510 case CTIO_SRR_RECEIVED:
2511 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2512 "qla_target(%d): CTIO with SRR_RECEIVED"
2513 " status %x received (state %x, se_cmd %p)\n",
2514 vha->vp_idx, status, cmd->state, se_cmd);
2515 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2516 break;
2517 else
2518 return;
2519
2520 default:
2521 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2522 "qla_target(%d): CTIO with error status "
2523 "0x%x received (state %x, se_cmd %p\n",
2524 vha->vp_idx, status, cmd->state, se_cmd);
2525 break;
2526 }
2527
2528 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2529 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2530 return;
2531 }
2532
2533 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2534 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2535 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2536 int rx_status = 0;
2537
2538 cmd->state = QLA_TGT_STATE_DATA_IN;
2539
2540 if (unlikely(status != CTIO_SUCCESS))
2541 rx_status = -EIO;
2542 else
2543 cmd->write_data_transferred = 1;
2544
2545 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2546 "Data received, context %x, rx_status %d\n",
2547 0x0, rx_status);
2548
2549 ha->tgt.tgt_ops->handle_data(cmd);
2550 return;
2551 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2552 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2553 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2554 } else {
2555 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2556 "qla_target(%d): A command in state (%d) should "
2557 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2558 }
2559
2560 if (unlikely(status != CTIO_SUCCESS)) {
2561 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2562 dump_stack();
2563 }
2564
2565 ha->tgt.tgt_ops->free_cmd(cmd);
2566}
2567
2568/* ha->hardware_lock supposed to be held on entry */
2569/* called via callback from qla2xxx */
2570void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle)
2571{
2572 struct qla_hw_data *ha = vha->hw;
2573 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2574
2575 if (likely(tgt == NULL)) {
2576 ql_dbg(ql_dbg_tgt, vha, 0xe021,
2577 "CTIO, but target mode not enabled"
2578 " (ha %d %p handle %#x)", vha->vp_idx, ha, handle);
2579 return;
2580 }
2581
2582 tgt->irq_cmd_count++;
2583 qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL);
2584 tgt->irq_cmd_count--;
2585}
2586
2587static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2588 uint8_t task_codes)
2589{
2590 int fcp_task_attr;
2591
2592 switch (task_codes) {
2593 case ATIO_SIMPLE_QUEUE:
2594 fcp_task_attr = MSG_SIMPLE_TAG;
2595 break;
2596 case ATIO_HEAD_OF_QUEUE:
2597 fcp_task_attr = MSG_HEAD_TAG;
2598 break;
2599 case ATIO_ORDERED_QUEUE:
2600 fcp_task_attr = MSG_ORDERED_TAG;
2601 break;
2602 case ATIO_ACA_QUEUE:
2603 fcp_task_attr = MSG_ACA_TAG;
2604 break;
2605 case ATIO_UNTAGGED:
2606 fcp_task_attr = MSG_SIMPLE_TAG;
2607 break;
2608 default:
2609 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2610 "qla_target: unknown task code %x, use ORDERED instead\n",
2611 task_codes);
2612 fcp_task_attr = MSG_ORDERED_TAG;
2613 break;
2614 }
2615
2616 return fcp_task_attr;
2617}
2618
2619static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2620 uint8_t *);
2621/*
2622 * Process context for I/O path into tcm_qla2xxx code
2623 */
2624static void qlt_do_work(struct work_struct *work)
2625{
2626 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2627 scsi_qla_host_t *vha = cmd->vha;
2628 struct qla_hw_data *ha = vha->hw;
2629 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2630 struct qla_tgt_sess *sess = NULL;
2631 struct atio_from_isp *atio = &cmd->atio;
2632 unsigned char *cdb;
2633 unsigned long flags;
2634 uint32_t data_length;
2635 int ret, fcp_task_attr, data_dir, bidi = 0;
2636
2637 if (tgt->tgt_stop)
2638 goto out_term;
2639
2640 spin_lock_irqsave(&ha->hardware_lock, flags);
2641 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2642 atio->u.isp24.fcp_hdr.s_id);
e1013f14
RD		 2643 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2644 if (sess)
2645 kref_get(&sess->se_sess->sess_kref);
2d70c103
NB		 2646 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2647
2648 if (unlikely(!sess)) {
2649 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2650
2651 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2652 "qla_target(%d): Unable to find wwn login"
2653 " (s_id %x:%x:%x), trying to create it manually\n",
2654 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2655
2656 if (atio->u.raw.entry_count > 1) {
2657 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2658 "Dropping multy entry cmd %p\n", cmd);
2659 goto out_term;
2660 }
2661
2662 mutex_lock(&ha->tgt.tgt_mutex);
2663 sess = qlt_make_local_sess(vha, s_id);
2664 /* sess has an extra creation ref. */
2665 mutex_unlock(&ha->tgt.tgt_mutex);
2666
2667 if (!sess)
2668 goto out_term;
2669 }
2670
2671 cmd->sess = sess;
2672 cmd->loop_id = sess->loop_id;
2673 cmd->conf_compl_supported = sess->conf_compl_supported;
2674
2675 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2676 cmd->tag = atio->u.isp24.exchange_addr;
2677 cmd->unpacked_lun = scsilun_to_int(
2678 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2679
2680 if (atio->u.isp24.fcp_cmnd.rddata &&
2681 atio->u.isp24.fcp_cmnd.wrdata) {
2682 bidi = 1;
2683 data_dir = DMA_TO_DEVICE;
2684 } else if (atio->u.isp24.fcp_cmnd.rddata)
2685 data_dir = DMA_FROM_DEVICE;
2686 else if (atio->u.isp24.fcp_cmnd.wrdata)
2687 data_dir = DMA_TO_DEVICE;
2688 else
2689 data_dir = DMA_NONE;
2690
2691 fcp_task_attr = qlt_get_fcp_task_attr(vha,
2692 atio->u.isp24.fcp_cmnd.task_attr);
2693 data_length = be32_to_cpu(get_unaligned((uint32_t *)
2694 &atio->u.isp24.fcp_cmnd.add_cdb[
2695 atio->u.isp24.fcp_cmnd.add_cdb_len]));
2696
2697 ql_dbg(ql_dbg_tgt, vha, 0xe022,
2698 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2699 cmd, cmd->unpacked_lun, cmd->tag);
2700
2701 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2702 fcp_task_attr, data_dir, bidi);
2703 if (ret != 0)
2704 goto out_term;
2705 /*
2706 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2707 */
2708 ha->tgt.tgt_ops->put_sess(sess);
2709 return;
2710
2711out_term:
2712 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2713 /*
fae9eaf8
RD		 2714 * cmd has not sent to target yet, so pass NULL as the second
2715 * argument to qlt_send_term_exchange() and free the memory here.
2d70c103
NB		 2716 */
2717 spin_lock_irqsave(&ha->hardware_lock, flags);
2718 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
fae9eaf8 2719 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2d70c103
NB		 2720 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2721 if (sess)
2722 ha->tgt.tgt_ops->put_sess(sess);
2723}
2724
2725/* ha->hardware_lock supposed to be held on entry */
2726static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2727 struct atio_from_isp *atio)
2728{
2729 struct qla_hw_data *ha = vha->hw;
2730 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2731 struct qla_tgt_cmd *cmd;
2732
2733 if (unlikely(tgt->tgt_stop)) {
2734 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2735 "New command while device %p is shutting down\n", tgt);
2736 return -EFAULT;
2737 }
2738
2739 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2740 if (!cmd) {
2741 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2742 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2743 return -ENOMEM;
2744 }
2745
2746 INIT_LIST_HEAD(&cmd->cmd_list);
2747
2748 memcpy(&cmd->atio, atio, sizeof(*atio));
2749 cmd->state = QLA_TGT_STATE_NEW;
2750 cmd->tgt = ha->tgt.qla_tgt;
2751 cmd->vha = vha;
2752
2753 INIT_WORK(&cmd->work, qlt_do_work);
2754 queue_work(qla_tgt_wq, &cmd->work);
2755 return 0;
2756
2757}
2758
2759/* ha->hardware_lock supposed to be held on entry */
2760static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2761 int fn, void *iocb, int flags)
2762{
2763 struct scsi_qla_host *vha = sess->vha;
2764 struct qla_hw_data *ha = vha->hw;
2765 struct qla_tgt_mgmt_cmd *mcmd;
2766 int res;
2767 uint8_t tmr_func;
2768
2769 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2770 if (!mcmd) {
2771 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2772 "qla_target(%d): Allocation of management "
2773 "command failed, some commands and their data could "
2774 "leak\n", vha->vp_idx);
2775 return -ENOMEM;
2776 }
2777 memset(mcmd, 0, sizeof(*mcmd));
2778 mcmd->sess = sess;
2779
2780 if (iocb) {
2781 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2782 sizeof(mcmd->orig_iocb.imm_ntfy));
2783 }
2784 mcmd->tmr_func = fn;
2785 mcmd->flags = flags;
2786
2787 switch (fn) {
2788 case QLA_TGT_CLEAR_ACA:
2789 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2790 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2791 tmr_func = TMR_CLEAR_ACA;
2792 break;
2793
2794 case QLA_TGT_TARGET_RESET:
2795 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2796 "qla_target(%d): TARGET_RESET received\n",
2797 sess->vha->vp_idx);
2798 tmr_func = TMR_TARGET_WARM_RESET;
2799 break;
2800
2801 case QLA_TGT_LUN_RESET:
2802 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2803 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2804 tmr_func = TMR_LUN_RESET;
2805 break;
2806
2807 case QLA_TGT_CLEAR_TS:
2808 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2809 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2810 tmr_func = TMR_CLEAR_TASK_SET;
2811 break;
2812
2813 case QLA_TGT_ABORT_TS:
2814 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2815 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2816 tmr_func = TMR_ABORT_TASK_SET;
2817 break;
2818#if 0
2819 case QLA_TGT_ABORT_ALL:
2820 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2821 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2822 sess->vha->vp_idx);
2823 tmr_func = 0;
2824 break;
2825
2826 case QLA_TGT_ABORT_ALL_SESS:
2827 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2828 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2829 sess->vha->vp_idx);
2830 tmr_func = 0;
2831 break;
2832
2833 case QLA_TGT_NEXUS_LOSS_SESS:
2834 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2835 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2836 sess->vha->vp_idx);
2837 tmr_func = 0;
2838 break;
2839
2840 case QLA_TGT_NEXUS_LOSS:
2841 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2842 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2843 tmr_func = 0;
2844 break;
2845#endif
2846 default:
2847 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2848 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2849 sess->vha->vp_idx, fn);
2850 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2851 return -ENOSYS;
2852 }
2853
2854 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2855 if (res != 0) {
2856 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2857 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2858 sess->vha->vp_idx, res);
2859 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2860 return -EFAULT;
2861 }
2862
2863 return 0;
2864}
2865
2866/* ha->hardware_lock supposed to be held on entry */
2867static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2868{
2869 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2870 struct qla_hw_data *ha = vha->hw;
2871 struct qla_tgt *tgt;
2872 struct qla_tgt_sess *sess;
2873 uint32_t lun, unpacked_lun;
2874 int lun_size, fn;
2875
2876 tgt = ha->tgt.qla_tgt;
2877
2878 lun = a->u.isp24.fcp_cmnd.lun;
2879 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2880 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2881 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2882 a->u.isp24.fcp_hdr.s_id);
2883 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2884
2885 if (!sess) {
2886 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2887 "qla_target(%d): task mgmt fn 0x%x for "
2888 "non-existant session\n", vha->vp_idx, fn);
2889 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2890 sizeof(struct atio_from_isp));
2891 }
2892
2893 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2894}
2895
2896/* ha->hardware_lock supposed to be held on entry */
2897static int __qlt_abort_task(struct scsi_qla_host *vha,
2898 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2899{
2900 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2901 struct qla_hw_data *ha = vha->hw;
2902 struct qla_tgt_mgmt_cmd *mcmd;
2903 uint32_t lun, unpacked_lun;
2904 int rc;
2905
2906 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2907 if (mcmd == NULL) {
2908 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2909 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2910 vha->vp_idx, __func__);
2911 return -ENOMEM;
2912 }
2913 memset(mcmd, 0, sizeof(*mcmd));
2914
2915 mcmd->sess = sess;
2916 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2917 sizeof(mcmd->orig_iocb.imm_ntfy));
2918
2919 lun = a->u.isp24.fcp_cmnd.lun;
2920 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2921
2922 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2923 le16_to_cpu(iocb->u.isp2x.seq_id));
2924 if (rc != 0) {
2925 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2926 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2927 vha->vp_idx, rc);
2928 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2929 return -EFAULT;
2930 }
2931
2932 return 0;
2933}
2934
2935/* ha->hardware_lock supposed to be held on entry */
2936static int qlt_abort_task(struct scsi_qla_host *vha,
2937 struct imm_ntfy_from_isp *iocb)
2938{
2939 struct qla_hw_data *ha = vha->hw;
2940 struct qla_tgt_sess *sess;
2941 int loop_id;
2942
2943 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2944
2945 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2946 if (sess == NULL) {
2947 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2948 "qla_target(%d): task abort for unexisting "
2949 "session\n", vha->vp_idx);
2950 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2951 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2952 }
2953
2954 return __qlt_abort_task(vha, iocb, sess);
2955}
2956
2957/*
2958 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2959 */
2960static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2961 struct imm_ntfy_from_isp *iocb)
2962{
2963 struct qla_hw_data *ha = vha->hw;
2964 int res = 0;
2965
2966 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2967 "qla_target(%d): Port ID: 0x%02x:%02x:%02x"
2968 " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0],
2969 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2],
2970 iocb->u.isp24.status_subcode);
2971
2972 switch (iocb->u.isp24.status_subcode) {
2973 case ELS_PLOGI:
2974 case ELS_FLOGI:
2975 case ELS_PRLI:
2976 case ELS_LOGO:
2977 case ELS_PRLO:
2978 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2979 break;
2980 case ELS_PDISC:
2981 case ELS_ADISC:
2982 {
2983 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2984 if (tgt->link_reinit_iocb_pending) {
2985 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2986 0, 0, 0, 0, 0, 0);
2987 tgt->link_reinit_iocb_pending = 0;
2988 }
2989 res = 1; /* send notify ack */
2990 break;
2991 }
2992
2993 default:
2994 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2995 "qla_target(%d): Unsupported ELS command %x "
2996 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2997 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2998 break;
2999 }
3000
3001 return res;
3002}
3003
3004static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3005{
3006 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3007 size_t first_offset = 0, rem_offset = offset, tmp = 0;
3008 int i, sg_srr_cnt, bufflen = 0;
3009
3010 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3011 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3012 "cmd->sg_cnt: %u, direction: %d\n",
3013 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3014
3015 /*
3016 * FIXME: Reject non zero SRR relative offset until we can test
3017 * this code properly.
3018 */
3019 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3020 return -1;
3021
3022 if (!cmd->sg || !cmd->sg_cnt) {
3023 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3024 "Missing cmd->sg or zero cmd->sg_cnt in"
3025 " qla_tgt_set_data_offset\n");
3026 return -EINVAL;
3027 }
3028 /*
3029 * Walk the current cmd->sg list until we locate the new sg_srr_start
3030 */
3031 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3032 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3033 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3034 i, sg, sg_page(sg), sg->length, sg->offset);
3035
3036 if ((sg->length + tmp) > offset) {
3037 first_offset = rem_offset;
3038 sg_srr_start = sg;
3039 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3040 "Found matching sg[%d], using %p as sg_srr_start, "
3041 "and using first_offset: %zu\n", i, sg,
3042 first_offset);
3043 break;
3044 }
3045 tmp += sg->length;
3046 rem_offset -= sg->length;
3047 }
3048
3049 if (!sg_srr_start) {
3050 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3051 "Unable to locate sg_srr_start for offset: %u\n", offset);
3052 return -EINVAL;
3053 }
3054 sg_srr_cnt = (cmd->sg_cnt - i);
3055
3056 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3057 if (!sg_srr) {
3058 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3059 "Unable to allocate sgp\n");
3060 return -ENOMEM;
3061 }
3062 sg_init_table(sg_srr, sg_srr_cnt);
3063 sgp = &sg_srr[0];
3064 /*
3065 * Walk the remaining list for sg_srr_start, mapping to the newly
3066 * allocated sg_srr taking first_offset into account.
3067 */
3068 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3069 if (first_offset) {
3070 sg_set_page(sgp, sg_page(sg),
3071 (sg->length - first_offset), first_offset);
3072 first_offset = 0;
3073 } else {
3074 sg_set_page(sgp, sg_page(sg), sg->length, 0);
3075 }
3076 bufflen += sgp->length;
3077
3078 sgp = sg_next(sgp);
3079 if (!sgp)
3080 break;
3081 }
3082
3083 cmd->sg = sg_srr;
3084 cmd->sg_cnt = sg_srr_cnt;
3085 cmd->bufflen = bufflen;
3086 cmd->offset += offset;
3087 cmd->free_sg = 1;
3088
3089 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3090 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3091 cmd->sg_cnt);
3092 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3093 cmd->bufflen);
3094 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3095 cmd->offset);
3096
3097 if (cmd->sg_cnt < 0)
3098 BUG();
3099
3100 if (cmd->bufflen < 0)
3101 BUG();
3102
3103 return 0;
3104}
3105
3106static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3107 uint32_t srr_rel_offs, int *xmit_type)
3108{
3109 int res = 0, rel_offs;
3110
3111 rel_offs = srr_rel_offs - cmd->offset;
3112 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3113 srr_rel_offs, rel_offs);
3114
3115 *xmit_type = QLA_TGT_XMIT_ALL;
3116
3117 if (rel_offs < 0) {
3118 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3119 "qla_target(%d): SRR rel_offs (%d) < 0",
3120 cmd->vha->vp_idx, rel_offs);
3121 res = -1;
3122 } else if (rel_offs == cmd->bufflen)
3123 *xmit_type = QLA_TGT_XMIT_STATUS;
3124 else if (rel_offs > 0)
3125 res = qlt_set_data_offset(cmd, rel_offs);
3126
3127 return res;
3128}
3129
3130/* No locks, thread context */
3131static void qlt_handle_srr(struct scsi_qla_host *vha,
3132 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3133{
3134 struct imm_ntfy_from_isp *ntfy =
3135 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3136 struct qla_hw_data *ha = vha->hw;
3137 struct qla_tgt_cmd *cmd = sctio->cmd;
3138 struct se_cmd *se_cmd = &cmd->se_cmd;
3139 unsigned long flags;
3140 int xmit_type = 0, resp = 0;
3141 uint32_t offset;
3142 uint16_t srr_ui;
3143
3144 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3145 srr_ui = ntfy->u.isp24.srr_ui;
3146
3147 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3148 cmd, srr_ui);
3149
3150 switch (srr_ui) {
3151 case SRR_IU_STATUS:
3152 spin_lock_irqsave(&ha->hardware_lock, flags);
3153 qlt_send_notify_ack(vha, ntfy,
3154 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3155 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3156 xmit_type = QLA_TGT_XMIT_STATUS;
3157 resp = 1;
3158 break;
3159 case SRR_IU_DATA_IN:
3160 if (!cmd->sg || !cmd->sg_cnt) {
3161 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3162 "Unable to process SRR_IU_DATA_IN due to"
3163 " missing cmd->sg, state: %d\n", cmd->state);
3164 dump_stack();
3165 goto out_reject;
3166 }
3167 if (se_cmd->scsi_status != 0) {
3168 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3169 "Rejecting SRR_IU_DATA_IN with non GOOD "
3170 "scsi_status\n");
3171 goto out_reject;
3172 }
3173 cmd->bufflen = se_cmd->data_length;
3174
3175 if (qlt_has_data(cmd)) {
3176 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3177 goto out_reject;
3178 spin_lock_irqsave(&ha->hardware_lock, flags);
3179 qlt_send_notify_ack(vha, ntfy,
3180 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3181 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3182 resp = 1;
3183 } else {
3184 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3185 "qla_target(%d): SRR for in data for cmd "
3186 "without them (tag %d, SCSI status %d), "
3187 "reject", vha->vp_idx, cmd->tag,
3188 cmd->se_cmd.scsi_status);
3189 goto out_reject;
3190 }
3191 break;
3192 case SRR_IU_DATA_OUT:
3193 if (!cmd->sg || !cmd->sg_cnt) {
3194 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3195 "Unable to process SRR_IU_DATA_OUT due to"
3196 " missing cmd->sg\n");
3197 dump_stack();
3198 goto out_reject;
3199 }
3200 if (se_cmd->scsi_status != 0) {
3201 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3202 "Rejecting SRR_IU_DATA_OUT"
3203 " with non GOOD scsi_status\n");
3204 goto out_reject;
3205 }
3206 cmd->bufflen = se_cmd->data_length;
3207
3208 if (qlt_has_data(cmd)) {
3209 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3210 goto out_reject;
3211 spin_lock_irqsave(&ha->hardware_lock, flags);
3212 qlt_send_notify_ack(vha, ntfy,
3213 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3214 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3215 if (xmit_type & QLA_TGT_XMIT_DATA)
3216 qlt_rdy_to_xfer(cmd);
3217 } else {
3218 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3219 "qla_target(%d): SRR for out data for cmd "
3220 "without them (tag %d, SCSI status %d), "
3221 "reject", vha->vp_idx, cmd->tag,
3222 cmd->se_cmd.scsi_status);
3223 goto out_reject;
3224 }
3225 break;
3226 default:
3227 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3228 "qla_target(%d): Unknown srr_ui value %x",
3229 vha->vp_idx, srr_ui);
3230 goto out_reject;
3231 }
3232
3233 /* Transmit response in case of status and data-in cases */
3234 if (resp)
3235 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3236
3237 return;
3238
3239out_reject:
3240 spin_lock_irqsave(&ha->hardware_lock, flags);
3241 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3242 NOTIFY_ACK_SRR_FLAGS_REJECT,
3243 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3244 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3245 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3246 cmd->state = QLA_TGT_STATE_DATA_IN;
3247 dump_stack();
3248 } else
3249 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3250 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3251}
3252
3253static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3254 struct qla_tgt_srr_imm *imm, int ha_locked)
3255{
3256 struct qla_hw_data *ha = vha->hw;
3257 unsigned long flags = 0;
3258
3259 if (!ha_locked)
3260 spin_lock_irqsave(&ha->hardware_lock, flags);
3261
3262 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3263 NOTIFY_ACK_SRR_FLAGS_REJECT,
3264 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3265 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3266
3267 if (!ha_locked)
3268 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3269
3270 kfree(imm);
3271}
3272
3273static void qlt_handle_srr_work(struct work_struct *work)
3274{
3275 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3276 struct scsi_qla_host *vha = tgt->vha;
3277 struct qla_tgt_srr_ctio *sctio;
3278 unsigned long flags;
3279
3280 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3281 tgt);
3282
3283restart:
3284 spin_lock_irqsave(&tgt->srr_lock, flags);
3285 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3286 struct qla_tgt_srr_imm *imm, *i, *ti;
3287 struct qla_tgt_cmd *cmd;
3288 struct se_cmd *se_cmd;
3289
3290 imm = NULL;
3291 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3292 srr_list_entry) {
3293 if (i->srr_id == sctio->srr_id) {
3294 list_del(&i->srr_list_entry);
3295 if (imm) {
3296 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3297 "qla_target(%d): There must be "
3298 "only one IMM SRR per CTIO SRR "
3299 "(IMM SRR %p, id %d, CTIO %p\n",
3300 vha->vp_idx, i, i->srr_id, sctio);
3301 qlt_reject_free_srr_imm(tgt->vha, i, 0);
3302 } else
3303 imm = i;
3304 }
3305 }
3306
3307 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3308 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3309 sctio->srr_id);
3310
3311 if (imm == NULL) {
3312 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3313 "Not found matching IMM for SRR CTIO (id %d)\n",
3314 sctio->srr_id);
3315 continue;
3316 } else
3317 list_del(&sctio->srr_list_entry);
3318
3319 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3320
3321 cmd = sctio->cmd;
3322 /*
3323 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3324 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3325 * logic..
3326 */
3327 cmd->offset = 0;
3328 if (cmd->free_sg) {
3329 kfree(cmd->sg);
3330 cmd->sg = NULL;
3331 cmd->free_sg = 0;
3332 }
3333 se_cmd = &cmd->se_cmd;
3334
3335 cmd->sg_cnt = se_cmd->t_data_nents;
3336 cmd->sg = se_cmd->t_data_sg;
3337
3338 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3339 "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3340 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3341 se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3342
3343 qlt_handle_srr(vha, sctio, imm);
3344
3345 kfree(imm);
3346 kfree(sctio);
3347 goto restart;
3348 }
3349 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3350}
3351
3352/* ha->hardware_lock supposed to be held on entry */
3353static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3354 struct imm_ntfy_from_isp *iocb)
3355{
3356 struct qla_tgt_srr_imm *imm;
3357 struct qla_hw_data *ha = vha->hw;
3358 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3359 struct qla_tgt_srr_ctio *sctio;
3360
3361 tgt->imm_srr_id++;
3362
3363 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3364 vha->vp_idx);
3365
3366 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3367 if (imm != NULL) {
3368 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3369
3370 /* IRQ is already OFF */
3371 spin_lock(&tgt->srr_lock);
3372 imm->srr_id = tgt->imm_srr_id;
3373 list_add_tail(&imm->srr_list_entry,
3374 &tgt->srr_imm_list);
3375 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3376 "IMM NTFY SRR %p added (id %d, ui %x)\n",
3377 imm, imm->srr_id, iocb->u.isp24.srr_ui);
3378 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3379 int found = 0;
3380 list_for_each_entry(sctio, &tgt->srr_ctio_list,
3381 srr_list_entry) {
3382 if (sctio->srr_id == imm->srr_id) {
3383 found = 1;
3384 break;
3385 }
3386 }
3387 if (found) {
3388 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3389 "Scheduling srr work\n");
3390 schedule_work(&tgt->srr_work);
3391 } else {
3392 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3393 "qla_target(%d): imm_srr_id "
3394 "== ctio_srr_id (%d), but there is no "
3395 "corresponding SRR CTIO, deleting IMM "
3396 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3397 imm);
3398 list_del(&imm->srr_list_entry);
3399
3400 kfree(imm);
3401
3402 spin_unlock(&tgt->srr_lock);
3403 goto out_reject;
3404 }
3405 }
3406 spin_unlock(&tgt->srr_lock);
3407 } else {
3408 struct qla_tgt_srr_ctio *ts;
3409
3410 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3411 "qla_target(%d): Unable to allocate SRR IMM "
3412 "entry, SRR request will be rejected\n", vha->vp_idx);
3413
3414 /* IRQ is already OFF */
3415 spin_lock(&tgt->srr_lock);
3416 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3417 srr_list_entry) {
3418 if (sctio->srr_id == tgt->imm_srr_id) {
3419 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3420 "CTIO SRR %p deleted (id %d)\n",
3421 sctio, sctio->srr_id);
3422 list_del(&sctio->srr_list_entry);
3423 qlt_send_term_exchange(vha, sctio->cmd,
3424 &sctio->cmd->atio, 1);
3425 kfree(sctio);
3426 }
3427 }
3428 spin_unlock(&tgt->srr_lock);
3429 goto out_reject;
3430 }
3431
3432 return;
3433
3434out_reject:
3435 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3436 NOTIFY_ACK_SRR_FLAGS_REJECT,
3437 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3438 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3439}
3440
3441/*
3442 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3443 */
3444static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3445 struct imm_ntfy_from_isp *iocb)
3446{
3447 struct qla_hw_data *ha = vha->hw;
3448 uint32_t add_flags = 0;
3449 int send_notify_ack = 1;
3450 uint16_t status;
3451
3452 status = le16_to_cpu(iocb->u.isp2x.status);
3453 switch (status) {
3454 case IMM_NTFY_LIP_RESET:
3455 {
3456 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3457 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3458 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3459 iocb->u.isp24.status_subcode);
3460
3461 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3462 send_notify_ack = 0;
3463 break;
3464 }
3465
3466 case IMM_NTFY_LIP_LINK_REINIT:
3467 {
3468 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3469 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3470 "qla_target(%d): LINK REINIT (loop %#x, "
3471 "subcode %x)\n", vha->vp_idx,
3472 le16_to_cpu(iocb->u.isp24.nport_handle),
3473 iocb->u.isp24.status_subcode);
3474 if (tgt->link_reinit_iocb_pending) {
3475 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3476 0, 0, 0, 0, 0, 0);
3477 }
3478 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3479 tgt->link_reinit_iocb_pending = 1;
3480 /*
3481 * QLogic requires to wait after LINK REINIT for possible
3482 * PDISC or ADISC ELS commands
3483 */
3484 send_notify_ack = 0;
3485 break;
3486 }
3487
3488 case IMM_NTFY_PORT_LOGOUT:
3489 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3490 "qla_target(%d): Port logout (loop "
3491 "%#x, subcode %x)\n", vha->vp_idx,
3492 le16_to_cpu(iocb->u.isp24.nport_handle),
3493 iocb->u.isp24.status_subcode);
3494
3495 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3496 send_notify_ack = 0;
3497 /* The sessions will be cleared in the callback, if needed */
3498 break;
3499
3500 case IMM_NTFY_GLBL_TPRLO:
3501 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3502 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3503 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3504 send_notify_ack = 0;
3505 /* The sessions will be cleared in the callback, if needed */
3506 break;
3507
3508 case IMM_NTFY_PORT_CONFIG:
3509 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3510 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3511 status);
3512 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3513 send_notify_ack = 0;
3514 /* The sessions will be cleared in the callback, if needed */
3515 break;
3516
3517 case IMM_NTFY_GLBL_LOGO:
3518 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3519 "qla_target(%d): Link failure detected\n",
3520 vha->vp_idx);
3521 /* I_T nexus loss */
3522 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3523 send_notify_ack = 0;
3524 break;
3525
3526 case IMM_NTFY_IOCB_OVERFLOW:
3527 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3528 "qla_target(%d): Cannot provide requested "
3529 "capability (IOCB overflowed the immediate notify "
3530 "resource count)\n", vha->vp_idx);
3531 break;
3532
3533 case IMM_NTFY_ABORT_TASK:
3534 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3535 "qla_target(%d): Abort Task (S %08x I %#x -> "
3536 "L %#x)\n", vha->vp_idx,
3537 le16_to_cpu(iocb->u.isp2x.seq_id),
3538 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3539 le16_to_cpu(iocb->u.isp2x.lun));
3540 if (qlt_abort_task(vha, iocb) == 0)
3541 send_notify_ack = 0;
3542 break;
3543
3544 case IMM_NTFY_RESOURCE:
3545 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3546 "qla_target(%d): Out of resources, host %ld\n",
3547 vha->vp_idx, vha->host_no);
3548 break;
3549
3550 case IMM_NTFY_MSG_RX:
3551 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3552 "qla_target(%d): Immediate notify task %x\n",
3553 vha->vp_idx, iocb->u.isp2x.task_flags);
3554 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3555 send_notify_ack = 0;
3556 break;
3557
3558 case IMM_NTFY_ELS:
3559 if (qlt_24xx_handle_els(vha, iocb) == 0)
3560 send_notify_ack = 0;
3561 break;
3562
3563 case IMM_NTFY_SRR:
3564 qlt_prepare_srr_imm(vha, iocb);
3565 send_notify_ack = 0;
3566 break;
3567
3568 default:
3569 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3570 "qla_target(%d): Received unknown immediate "
3571 "notify status %x\n", vha->vp_idx, status);
3572 break;
3573 }
3574
3575 if (send_notify_ack)
3576 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3577}
3578
3579/*
3580 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3581 * This function sends busy to ISP 2xxx or 24xx.
3582 */
3583static void qlt_send_busy(struct scsi_qla_host *vha,
3584 struct atio_from_isp *atio, uint16_t status)
3585{
3586 struct ctio7_to_24xx *ctio24;
3587 struct qla_hw_data *ha = vha->hw;
3588 request_t *pkt;
3589 struct qla_tgt_sess *sess = NULL;
3590
3591 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3592 atio->u.isp24.fcp_hdr.s_id);
3593 if (!sess) {
3594 qlt_send_term_exchange(vha, NULL, atio, 1);
3595 return;
3596 }
3597 /* Sending marker isn't necessary, since we called from ISR */
3598
3599 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3600 if (!pkt) {
3601 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3602 "qla_target(%d): %s failed: unable to allocate "
3603 "request packet", vha->vp_idx, __func__);
3604 return;
3605 }
3606
3607 pkt->entry_count = 1;
3608 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3609
3610 ctio24 = (struct ctio7_to_24xx *)pkt;
3611 ctio24->entry_type = CTIO_TYPE7;
3612 ctio24->nport_handle = sess->loop_id;
3613 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3614 ctio24->vp_index = vha->vp_idx;
3615 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3616 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3617 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3618 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3619 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3620 __constant_cpu_to_le16(
3621 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3622 CTIO7_FLAGS_DONT_RET_CTIO);
3623 /*
3624 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3625 * if the explicit conformation is used.
3626 */
3627 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3628 ctio24->u.status1.scsi_status = cpu_to_le16(status);
3629 ctio24->u.status1.residual = get_unaligned((uint32_t *)
3630 &atio->u.isp24.fcp_cmnd.add_cdb[
3631 atio->u.isp24.fcp_cmnd.add_cdb_len]);
3632 if (ctio24->u.status1.residual != 0)
3633 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3634
3635 qla2x00_start_iocbs(vha, vha->req);
3636}
3637
3638/* ha->hardware_lock supposed to be held on entry */
3639/* called via callback from qla2xxx */
3640static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3641 struct atio_from_isp *atio)
3642{
3643 struct qla_hw_data *ha = vha->hw;
3644 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3645 int rc;
3646
3647 if (unlikely(tgt == NULL)) {
3648 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3649 "ATIO pkt, but no tgt (ha %p)", ha);
3650 return;
3651 }
3652 ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3653 "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3654 vha->vp_idx, atio, atio->u.raw.entry_type,
3655 atio->u.raw.entry_count);
3656 /*
3657 * In tgt_stop mode we also should allow all requests to pass.
3658 * Otherwise, some commands can stuck.
3659 */
3660
3661 tgt->irq_cmd_count++;
3662
3663 switch (atio->u.raw.entry_type) {
3664 case ATIO_TYPE7:
3665 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3666 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3667 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3668 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3669 atio->u.isp24.fcp_cmnd.rddata,
3670 atio->u.isp24.fcp_cmnd.wrdata,
3671 atio->u.isp24.fcp_cmnd.add_cdb_len,
3672 be32_to_cpu(get_unaligned((uint32_t *)
3673 &atio->u.isp24.fcp_cmnd.add_cdb[
3674 atio->u.isp24.fcp_cmnd.add_cdb_len])),
3675 atio->u.isp24.fcp_hdr.s_id[0],
3676 atio->u.isp24.fcp_hdr.s_id[1],
3677 atio->u.isp24.fcp_hdr.s_id[2]);
3678
3679 if (unlikely(atio->u.isp24.exchange_addr ==
3680 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3681 ql_dbg(ql_dbg_tgt, vha, 0xe058,
3682 "qla_target(%d): ATIO_TYPE7 "
3683 "received with UNKNOWN exchange address, "
3684 "sending QUEUE_FULL\n", vha->vp_idx);
3685 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3686 break;
3687 }
3688 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3689 rc = qlt_handle_cmd_for_atio(vha, atio);
3690 else
3691 rc = qlt_handle_task_mgmt(vha, atio);
3692 if (unlikely(rc != 0)) {
3693 if (rc == -ESRCH) {
3694#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3695 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3696#else
3697 qlt_send_term_exchange(vha, NULL, atio, 1);
3698#endif
3699 } else {
3700 if (tgt->tgt_stop) {
3701 ql_dbg(ql_dbg_tgt, vha, 0xe059,
3702 "qla_target: Unable to send "
3703 "command to target for req, "
3704 "ignoring.\n");
3705 } else {
3706 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3707 "qla_target(%d): Unable to send "
3708 "command to target, sending BUSY "
3709 "status.\n", vha->vp_idx);
3710 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3711 }
3712 }
3713 }
3714 break;
3715
3716 case IMMED_NOTIFY_TYPE:
3717 {
3718 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3719 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3720 "qla_target(%d): Received ATIO packet %x "
3721 "with error status %x\n", vha->vp_idx,
3722 atio->u.raw.entry_type,
3723 atio->u.isp2x.entry_status);
3724 break;
3725 }
3726 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3727 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3728 break;
3729 }
3730
3731 default:
3732 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3733 "qla_target(%d): Received unknown ATIO atio "
3734 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3735 break;
3736 }
3737
3738 tgt->irq_cmd_count--;
3739}
3740
3741/* ha->hardware_lock supposed to be held on entry */
3742/* called via callback from qla2xxx */
3743static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3744{
3745 struct qla_hw_data *ha = vha->hw;
3746 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3747
3748 if (unlikely(tgt == NULL)) {
3749 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3750 "qla_target(%d): Response pkt %x received, but no "
3751 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3752 return;
3753 }
3754
3755 ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3756 "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3757 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3758 pkt->entry_count, pkt->entry_status, pkt->handle);
3759
3760 /*
3761 * In tgt_stop mode we also should allow all requests to pass.
3762 * Otherwise, some commands can stuck.
3763 */
3764
3765 tgt->irq_cmd_count++;
3766
3767 switch (pkt->entry_type) {
3768 case CTIO_TYPE7:
3769 {
3770 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3771 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3772 vha->vp_idx);
3773 qlt_do_ctio_completion(vha, entry->handle,
3774 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3775 entry);
3776 break;
3777 }
3778
3779 case ACCEPT_TGT_IO_TYPE:
3780 {
3781 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3782 int rc;
3783 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3784 "ACCEPT_TGT_IO instance %d status %04x "
3785 "lun %04x read/write %d data_length %04x "
3786 "target_id %02x rx_id %04x\n ", vha->vp_idx,
3787 le16_to_cpu(atio->u.isp2x.status),
3788 le16_to_cpu(atio->u.isp2x.lun),
3789 atio->u.isp2x.execution_codes,
3790 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3791 atio), atio->u.isp2x.rx_id);
3792 if (atio->u.isp2x.status !=
3793 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3794 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3795 "qla_target(%d): ATIO with error "
3796 "status %x received\n", vha->vp_idx,
3797 le16_to_cpu(atio->u.isp2x.status));
3798 break;
3799 }
3800 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3801 "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3802 atio->u.isp2x.cdb[0], (unsigned long
3803 int)sizeof(atio->u.isp2x.cdb));
3804
3805 rc = qlt_handle_cmd_for_atio(vha, atio);
3806 if (unlikely(rc != 0)) {
3807 if (rc == -ESRCH) {
3808#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3809 qlt_send_busy(vha, atio, 0);
3810#else
3811 qlt_send_term_exchange(vha, NULL, atio, 1);
3812#endif
3813 } else {
3814 if (tgt->tgt_stop) {
3815 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3816 "qla_target: Unable to send "
3817 "command to target, sending TERM "
3818 "EXCHANGE for rsp\n");
3819 qlt_send_term_exchange(vha, NULL,
3820 atio, 1);
3821 } else {
3822 ql_dbg(ql_dbg_tgt, vha, 0xe060,
3823 "qla_target(%d): Unable to send "
3824 "command to target, sending BUSY "
3825 "status\n", vha->vp_idx);
3826 qlt_send_busy(vha, atio, 0);
3827 }
3828 }
3829 }
3830 }
3831 break;
3832
3833 case CONTINUE_TGT_IO_TYPE:
3834 {
3835 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3836 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3837 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3838 qlt_do_ctio_completion(vha, entry->handle,
3839 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3840 entry);
3841 break;
3842 }
3843
3844 case CTIO_A64_TYPE:
3845 {
3846 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3847 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3848 vha->vp_idx);
3849 qlt_do_ctio_completion(vha, entry->handle,
3850 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3851 entry);
3852 break;
3853 }
3854
3855 case IMMED_NOTIFY_TYPE:
3856 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3857 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3858 break;
3859
3860 case NOTIFY_ACK_TYPE:
3861 if (tgt->notify_ack_expected > 0) {
3862 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3863 ql_dbg(ql_dbg_tgt, vha, 0xe036,
3864 "NOTIFY_ACK seq %08x status %x\n",
3865 le16_to_cpu(entry->u.isp2x.seq_id),
3866 le16_to_cpu(entry->u.isp2x.status));
3867 tgt->notify_ack_expected--;
3868 if (entry->u.isp2x.status !=
3869 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3870 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3871 "qla_target(%d): NOTIFY_ACK "
3872 "failed %x\n", vha->vp_idx,
3873 le16_to_cpu(entry->u.isp2x.status));
3874 }
3875 } else {
3876 ql_dbg(ql_dbg_tgt, vha, 0xe062,
3877 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3878 vha->vp_idx);
3879 }
3880 break;
3881
3882 case ABTS_RECV_24XX:
3883 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3884 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3885 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3886 break;
3887
3888 case ABTS_RESP_24XX:
3889 if (tgt->abts_resp_expected > 0) {
3890 struct abts_resp_from_24xx_fw *entry =
3891 (struct abts_resp_from_24xx_fw *)pkt;
3892 ql_dbg(ql_dbg_tgt, vha, 0xe038,
3893 "ABTS_RESP_24XX: compl_status %x\n",
3894 entry->compl_status);
3895 tgt->abts_resp_expected--;
3896 if (le16_to_cpu(entry->compl_status) !=
3897 ABTS_RESP_COMPL_SUCCESS) {
3898 if ((entry->error_subcode1 == 0x1E) &&
3899 (entry->error_subcode2 == 0)) {
3900 /*
3901 * We've got a race here: aborted
3902 * exchange not terminated, i.e.
3903 * response for the aborted command was
3904 * sent between the abort request was
3905 * received and processed.
3906 * Unfortunately, the firmware has a
3907 * silly requirement that all aborted
3908 * exchanges must be explicitely
3909 * terminated, otherwise it refuses to
3910 * send responses for the abort
3911 * requests. So, we have to
3912 * (re)terminate the exchange and retry
3913 * the abort response.
3914 */
3915 qlt_24xx_retry_term_exchange(vha,
3916 entry);
3917 } else
3918 ql_dbg(ql_dbg_tgt, vha, 0xe063,
3919 "qla_target(%d): ABTS_RESP_24XX "
3920 "failed %x (subcode %x:%x)",
3921 vha->vp_idx, entry->compl_status,
3922 entry->error_subcode1,
3923 entry->error_subcode2);
3924 }
3925 } else {
3926 ql_dbg(ql_dbg_tgt, vha, 0xe064,
3927 "qla_target(%d): Unexpected ABTS_RESP_24XX "
3928 "received\n", vha->vp_idx);
3929 }
3930 break;
3931
3932 default:
3933 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3934 "qla_target(%d): Received unknown response pkt "
3935 "type %x\n", vha->vp_idx, pkt->entry_type);
3936 break;
3937 }
3938
3939 tgt->irq_cmd_count--;
3940}
3941
3942/*
3943 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3944 */
3945void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3946 uint16_t *mailbox)
3947{
3948 struct qla_hw_data *ha = vha->hw;
3949 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4f1d0f19 3950 int login_code;
2d70c103
NB		 3951
3952 ql_dbg(ql_dbg_tgt, vha, 0xe039,
3953 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3954 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3955 ha->operating_mode, ha->current_topology);
3956
3957 if (!ha->tgt.tgt_ops)
3958 return;
3959
3960 if (unlikely(tgt == NULL)) {
3961 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3962 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3963 return;
3964 }
3965
3966 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3967 IS_QLA2100(ha))
3968 return;
3969 /*
3970 * In tgt_stop mode we also should allow all requests to pass.
3971 * Otherwise, some commands can stuck.
3972 */
3973
3974 tgt->irq_cmd_count++;
3975
3976 switch (code) {
3977 case MBA_RESET: /* Reset */
3978 case MBA_SYSTEM_ERR: /* System Error */
3979 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
3980 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
3981 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3982 "qla_target(%d): System error async event %#x "
3983 "occured", vha->vp_idx, code);
3984 break;
3985 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
3986 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3987 break;
3988
3989 case MBA_LOOP_UP:
3990 {
3991 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3992 "qla_target(%d): Async LOOP_UP occured "
4f1d0f19
AC		 3993 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3994 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3995 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 3996 if (tgt->link_reinit_iocb_pending) {
3997 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3998 0, 0, 0, 0, 0, 0);
3999 tgt->link_reinit_iocb_pending = 0;
4000 }
4001 break;
4002 }
4003
4004 case MBA_LIP_OCCURRED:
4005 case MBA_LOOP_DOWN:
4006 case MBA_LIP_RESET:
4007 case MBA_RSCN_UPDATE:
4008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4009 "qla_target(%d): Async event %#x occured "
4f1d0f19
AC		 4010 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4011 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4012 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 4013 break;
4014
4015 case MBA_PORT_UPDATE:
4016 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4017 "qla_target(%d): Port update async event %#x "
4f1d0f19
AC		 4018 "occured: updating the ports database (m[0]=%x, m[1]=%x, "
4019 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4020 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4021 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4022
4023 login_code = le16_to_cpu(mailbox[2]);
4024 if (login_code == 0x4)
2d70c103
NB		 4025 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4026 "Async MB 2: Got PLOGI Complete\n");
4f1d0f19 4027 else if (login_code == 0x7)
2d70c103
NB		 4028 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4029 "Async MB 2: Port Logged Out\n");
4030 break;
4031
4032 default:
4033 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4034 "qla_target(%d): Async event %#x occured: "
4f1d0f19
AC		 4035 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4036 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4037 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 4038 break;
4039 }
4040
4041 tgt->irq_cmd_count--;
4042}
4043
4044static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4045 uint16_t loop_id)
4046{
4047 fc_port_t *fcport;
4048 int rc;
4049
4050 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4051 if (!fcport) {
4052 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4053 "qla_target(%d): Allocation of tmp FC port failed",
4054 vha->vp_idx);
4055 return NULL;
4056 }
4057
4058 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4059
4060 fcport->loop_id = loop_id;
4061
4062 rc = qla2x00_get_port_database(vha, fcport, 0);
4063 if (rc != QLA_SUCCESS) {
4064 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4065 "qla_target(%d): Failed to retrieve fcport "
4066 "information -- get_port_database() returned %x "
4067 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4068 kfree(fcport);
4069 return NULL;
4070 }
4071
4072 return fcport;
4073}
4074
4075/* Must be called under tgt_mutex */
4076static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4077 uint8_t *s_id)
4078{
4079 struct qla_hw_data *ha = vha->hw;
4080 struct qla_tgt_sess *sess = NULL;
4081 fc_port_t *fcport = NULL;
4082 int rc, global_resets;
4083 uint16_t loop_id = 0;
4084
4085retry:
4086 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
4087
4088 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4089 if (rc != 0) {
4090 if ((s_id[0] == 0xFF) &&
4091 (s_id[1] == 0xFC)) {
4092 /*
4093 * This is Domain Controller, so it should be
4094 * OK to drop SCSI commands from it.
4095 */
4096 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4097 "Unable to find initiator with S_ID %x:%x:%x",
4098 s_id[0], s_id[1], s_id[2]);
4099 } else
4100 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4101 "qla_target(%d): Unable to find "
4102 "initiator with S_ID %x:%x:%x",
4103 vha->vp_idx, s_id[0], s_id[1],
4104 s_id[2]);
4105 return NULL;
4106 }
4107
4108 fcport = qlt_get_port_database(vha, loop_id);
4109 if (!fcport)
4110 return NULL;
4111
4112 if (global_resets !=
4113 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
4114 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4115 "qla_target(%d): global reset during session discovery "
4116 "(counter was %d, new %d), retrying", vha->vp_idx,
4117 global_resets,
4118 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
4119 goto retry;
4120 }
4121
4122 sess = qlt_create_sess(vha, fcport, true);
4123
4124 kfree(fcport);
4125 return sess;
4126}
4127
4128static void qlt_abort_work(struct qla_tgt *tgt,
4129 struct qla_tgt_sess_work_param *prm)
4130{
4131 struct scsi_qla_host *vha = tgt->vha;
4132 struct qla_hw_data *ha = vha->hw;
4133 struct qla_tgt_sess *sess = NULL;
4134 unsigned long flags;
4135 uint32_t be_s_id;
4136 uint8_t s_id[3];
4137 int rc;
4138
4139 spin_lock_irqsave(&ha->hardware_lock, flags);
4140
4141 if (tgt->tgt_stop)
4142 goto out_term;
4143
4144 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4145 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4146 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4147
4148 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4149 (unsigned char *)&be_s_id);
4150 if (!sess) {
4151 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4152
4153 mutex_lock(&ha->tgt.tgt_mutex);
4154 sess = qlt_make_local_sess(vha, s_id);
4155 /* sess has got an extra creation ref */
4156 mutex_unlock(&ha->tgt.tgt_mutex);
4157
4158 spin_lock_irqsave(&ha->hardware_lock, flags);
4159 if (!sess)
4160 goto out_term;
4161 } else {
4162 kref_get(&sess->se_sess->sess_kref);
4163 }
4164
4165 if (tgt->tgt_stop)
4166 goto out_term;
4167
4168 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4169 if (rc != 0)
4170 goto out_term;
4171 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4172
4173 ha->tgt.tgt_ops->put_sess(sess);
4174 return;
4175
4176out_term:
4177 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4178 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4179 if (sess)
4180 ha->tgt.tgt_ops->put_sess(sess);
4181}
4182
4183static void qlt_tmr_work(struct qla_tgt *tgt,
4184 struct qla_tgt_sess_work_param *prm)
4185{
4186 struct atio_from_isp *a = &prm->tm_iocb2;
4187 struct scsi_qla_host *vha = tgt->vha;
4188 struct qla_hw_data *ha = vha->hw;
4189 struct qla_tgt_sess *sess = NULL;
4190 unsigned long flags;
4191 uint8_t *s_id = NULL; /* to hide compiler warnings */
4192 int rc;
4193 uint32_t lun, unpacked_lun;
4194 int lun_size, fn;
4195 void *iocb;
4196
4197 spin_lock_irqsave(&ha->hardware_lock, flags);
4198
4199 if (tgt->tgt_stop)
4200 goto out_term;
4201
4202 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4203 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4204 if (!sess) {
4205 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4206
4207 mutex_lock(&ha->tgt.tgt_mutex);
4208 sess = qlt_make_local_sess(vha, s_id);
4209 /* sess has got an extra creation ref */
4210 mutex_unlock(&ha->tgt.tgt_mutex);
4211
4212 spin_lock_irqsave(&ha->hardware_lock, flags);
4213 if (!sess)
4214 goto out_term;
4215 } else {
4216 kref_get(&sess->se_sess->sess_kref);
4217 }
4218
4219 iocb = a;
4220 lun = a->u.isp24.fcp_cmnd.lun;
4221 lun_size = sizeof(lun);
4222 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4223 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4224
4225 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4226 if (rc != 0)
4227 goto out_term;
4228 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4229
4230 ha->tgt.tgt_ops->put_sess(sess);
4231 return;
4232
4233out_term:
4234 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4235 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4236 if (sess)
4237 ha->tgt.tgt_ops->put_sess(sess);
4238}
4239
4240static void qlt_sess_work_fn(struct work_struct *work)
4241{
4242 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4243 struct scsi_qla_host *vha = tgt->vha;
4244 unsigned long flags;
4245
4246 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4247
4248 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4249 while (!list_empty(&tgt->sess_works_list)) {
4250 struct qla_tgt_sess_work_param *prm = list_entry(
4251 tgt->sess_works_list.next, typeof(*prm),
4252 sess_works_list_entry);
4253
4254 /*
4255 * This work can be scheduled on several CPUs at time, so we
4256 * must delete the entry to eliminate double processing
4257 */
4258 list_del(&prm->sess_works_list_entry);
4259
4260 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4261
4262 switch (prm->type) {
4263 case QLA_TGT_SESS_WORK_ABORT:
4264 qlt_abort_work(tgt, prm);
4265 break;
4266 case QLA_TGT_SESS_WORK_TM:
4267 qlt_tmr_work(tgt, prm);
4268 break;
4269 default:
4270 BUG_ON(1);
4271 break;
4272 }
4273
4274 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4275
4276 kfree(prm);
4277 }
4278 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4279}
4280
4281/* Must be called under tgt_host_action_mutex */
4282int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4283{
4284 struct qla_tgt *tgt;
4285
4286 if (!QLA_TGT_MODE_ENABLED())
4287 return 0;
4288
4289 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4290 "Registering target for host %ld(%p)", base_vha->host_no, ha);
4291
4292 BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4293
4294 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4295 if (!tgt) {
4296 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4297 "Unable to allocate struct qla_tgt\n");
4298 return -ENOMEM;
4299 }
4300
4301 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4302 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4303
4304 tgt->ha = ha;
4305 tgt->vha = base_vha;
4306 init_waitqueue_head(&tgt->waitQ);
4307 INIT_LIST_HEAD(&tgt->sess_list);
4308 INIT_LIST_HEAD(&tgt->del_sess_list);
4309 INIT_DELAYED_WORK(&tgt->sess_del_work,
4310 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4311 spin_lock_init(&tgt->sess_work_lock);
4312 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4313 INIT_LIST_HEAD(&tgt->sess_works_list);
4314 spin_lock_init(&tgt->srr_lock);
4315 INIT_LIST_HEAD(&tgt->srr_ctio_list);
4316 INIT_LIST_HEAD(&tgt->srr_imm_list);
4317 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4318 atomic_set(&tgt->tgt_global_resets_count, 0);
4319
4320 ha->tgt.qla_tgt = tgt;
4321
4322 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4323 "qla_target(%d): using 64 Bit PCI addressing",
4324 base_vha->vp_idx);
4325 tgt->tgt_enable_64bit_addr = 1;
4326 /* 3 is reserved */
4327 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4328 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4329 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4330
4331 mutex_lock(&qla_tgt_mutex);
4332 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4333 mutex_unlock(&qla_tgt_mutex);
4334
4335 return 0;
4336}
4337
4338/* Must be called under tgt_host_action_mutex */
4339int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4340{
4341 if (!ha->tgt.qla_tgt)
4342 return 0;
4343
4344 mutex_lock(&qla_tgt_mutex);
4345 list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4346 mutex_unlock(&qla_tgt_mutex);
4347
4348 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4349 vha->host_no, ha);
4350 qlt_release(ha->tgt.qla_tgt);
4351
4352 return 0;
4353}
4354
4355static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4356 unsigned char *b)
4357{
4358 int i;
4359
4360 pr_debug("qla2xxx HW vha->node_name: ");
4361 for (i = 0; i < WWN_SIZE; i++)
4362 pr_debug("%02x ", vha->node_name[i]);
4363 pr_debug("\n");
4364 pr_debug("qla2xxx HW vha->port_name: ");
4365 for (i = 0; i < WWN_SIZE; i++)
4366 pr_debug("%02x ", vha->port_name[i]);
4367 pr_debug("\n");
4368
4369 pr_debug("qla2xxx passed configfs WWPN: ");
4370 put_unaligned_be64(wwpn, b);
4371 for (i = 0; i < WWN_SIZE; i++)
4372 pr_debug("%02x ", b[i]);
4373 pr_debug("\n");
4374}
4375
4376/**
4377 * qla_tgt_lport_register - register lport with external module
4378 *
4379 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4380 * @wwpn: Passwd FC target WWPN
4381 * @callback: lport initialization callback for tcm_qla2xxx code
4382 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4383 */
4384int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4385 int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4386{
4387 struct qla_tgt *tgt;
4388 struct scsi_qla_host *vha;
4389 struct qla_hw_data *ha;
4390 struct Scsi_Host *host;
4391 unsigned long flags;
4392 int rc;
4393 u8 b[WWN_SIZE];
4394
4395 mutex_lock(&qla_tgt_mutex);
4396 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4397 vha = tgt->vha;
4398 ha = vha->hw;
4399
4400 host = vha->host;
4401 if (!host)
4402 continue;
4403
4404 if (ha->tgt.tgt_ops != NULL)
4405 continue;
4406
4407 if (!(host->hostt->supported_mode & MODE_TARGET))
4408 continue;
4409
4410 spin_lock_irqsave(&ha->hardware_lock, flags);
4411 if (host->active_mode & MODE_TARGET) {
4412 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4413 host->host_no);
4414 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4415 continue;
4416 }
4417 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4418
4419 if (!scsi_host_get(host)) {
4420 ql_dbg(ql_dbg_tgt, vha, 0xe068,
4421 "Unable to scsi_host_get() for"
4422 " qla2xxx scsi_host\n");
4423 continue;
4424 }
4425 qlt_lport_dump(vha, wwpn, b);
4426
4427 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4428 scsi_host_put(host);
4429 continue;
4430 }
4431 /*
4432 * Setup passed parameters ahead of invoking callback
4433 */
4434 ha->tgt.tgt_ops = qla_tgt_ops;
4435 ha->tgt.target_lport_ptr = target_lport_ptr;
4436 rc = (*callback)(vha);
4437 if (rc != 0) {
4438 ha->tgt.tgt_ops = NULL;
4439 ha->tgt.target_lport_ptr = NULL;
4440 }
4441 mutex_unlock(&qla_tgt_mutex);
4442 return rc;
4443 }
4444 mutex_unlock(&qla_tgt_mutex);
4445
4446 return -ENODEV;
4447}
4448EXPORT_SYMBOL(qlt_lport_register);
4449
4450/**
4451 * qla_tgt_lport_deregister - Degister lport
4452 *
4453 * @vha: Registered scsi_qla_host pointer
4454 */
4455void qlt_lport_deregister(struct scsi_qla_host *vha)
4456{
4457 struct qla_hw_data *ha = vha->hw;
4458 struct Scsi_Host *sh = vha->host;
4459 /*
4460 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4461 */
4462 ha->tgt.target_lport_ptr = NULL;
4463 ha->tgt.tgt_ops = NULL;
4464 /*
4465 * Release the Scsi_Host reference for the underlying qla2xxx host
4466 */
4467 scsi_host_put(sh);
4468}
4469EXPORT_SYMBOL(qlt_lport_deregister);
4470
4471/* Must be called under HW lock */
4472void qlt_set_mode(struct scsi_qla_host *vha)
4473{
4474 struct qla_hw_data *ha = vha->hw;
4475
4476 switch (ql2x_ini_mode) {
4477 case QLA2XXX_INI_MODE_DISABLED:
4478 case QLA2XXX_INI_MODE_EXCLUSIVE:
4479 vha->host->active_mode = MODE_TARGET;
4480 break;
4481 case QLA2XXX_INI_MODE_ENABLED:
4482 vha->host->active_mode |= MODE_TARGET;
4483 break;
4484 default:
4485 break;
4486 }
4487
4488 if (ha->tgt.ini_mode_force_reverse)
4489 qla_reverse_ini_mode(vha);
4490}
4491
4492/* Must be called under HW lock */
4493void qlt_clear_mode(struct scsi_qla_host *vha)
4494{
4495 struct qla_hw_data *ha = vha->hw;
4496
4497 switch (ql2x_ini_mode) {
4498 case QLA2XXX_INI_MODE_DISABLED:
4499 vha->host->active_mode = MODE_UNKNOWN;
4500 break;
4501 case QLA2XXX_INI_MODE_EXCLUSIVE:
4502 vha->host->active_mode = MODE_INITIATOR;
4503 break;
4504 case QLA2XXX_INI_MODE_ENABLED:
4505 vha->host->active_mode &= ~MODE_TARGET;
4506 break;
4507 default:
4508 break;
4509 }
4510
4511 if (ha->tgt.ini_mode_force_reverse)
4512 qla_reverse_ini_mode(vha);
4513}
4514
4515/*
4516 * qla_tgt_enable_vha - NO LOCK HELD
4517 *
4518 * host_reset, bring up w/ Target Mode Enabled
4519 */
4520void
4521qlt_enable_vha(struct scsi_qla_host *vha)
4522{
4523 struct qla_hw_data *ha = vha->hw;
4524 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4525 unsigned long flags;
4526
4527 if (!tgt) {
4528 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4529 "Unable to locate qla_tgt pointer from"
4530 " struct qla_hw_data\n");
4531 dump_stack();
4532 return;
4533 }
4534
4535 spin_lock_irqsave(&ha->hardware_lock, flags);
4536 tgt->tgt_stopped = 0;
4537 qlt_set_mode(vha);
4538 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4539
4540 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4541 qla2xxx_wake_dpc(vha);
4542 qla2x00_wait_for_hba_online(vha);
4543}
4544EXPORT_SYMBOL(qlt_enable_vha);
4545
4546/*
4547 * qla_tgt_disable_vha - NO LOCK HELD
4548 *
4549 * Disable Target Mode and reset the adapter
4550 */
4551void
4552qlt_disable_vha(struct scsi_qla_host *vha)
4553{
4554 struct qla_hw_data *ha = vha->hw;
4555 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4556 unsigned long flags;
4557
4558 if (!tgt) {
4559 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4560 "Unable to locate qla_tgt pointer from"
4561 " struct qla_hw_data\n");
4562 dump_stack();
4563 return;
4564 }
4565
4566 spin_lock_irqsave(&ha->hardware_lock, flags);
4567 qlt_clear_mode(vha);
4568 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4569
4570 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4571 qla2xxx_wake_dpc(vha);
4572 qla2x00_wait_for_hba_online(vha);
4573}
4574
4575/*
4576 * Called from qla_init.c:qla24xx_vport_create() contex to setup
4577 * the target mode specific struct scsi_qla_host and struct qla_hw_data
4578 * members.
4579 */
4580void
4581qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4582{
4583 if (!qla_tgt_mode_enabled(vha))
4584 return;
4585
4586 mutex_init(&ha->tgt.tgt_mutex);
4587 mutex_init(&ha->tgt.tgt_host_action_mutex);
4588
4589 qlt_clear_mode(vha);
4590
4591 /*
4592 * NOTE: Currently the value is kept the same for <24xx and
4593 * >=24xx ISPs. If it is necessary to change it,
4594 * the check should be added for specific ISPs,
4595 * assigning the value appropriately.
4596 */
4597 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4598}
4599
4600void
4601qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4602{
4603 /*
4604 * FC-4 Feature bit 0 indicates target functionality to the name server.
4605 */
4606 if (qla_tgt_mode_enabled(vha)) {
4607 if (qla_ini_mode_enabled(vha))
4608 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4609 else
4610 ct_req->req.rff_id.fc4_feature = BIT_0;
4611 } else if (qla_ini_mode_enabled(vha)) {
4612 ct_req->req.rff_id.fc4_feature = BIT_1;
4613 }
4614}
4615
4616/*
4617 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4618 * @ha: HA context
4619 *
4620 * Beginning of ATIO ring has initialization control block already built
4621 * by nvram config routine.
4622 *
4623 * Returns 0 on success.
4624 */
4625void
4626qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4627{
4628 struct qla_hw_data *ha = vha->hw;
4629 uint16_t cnt;
4630 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4631
4632 if (!qla_tgt_mode_enabled(vha))
4633 return;
4634
4635 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4636 pkt->u.raw.signature = ATIO_PROCESSED;
4637 pkt++;
4638 }
4639
4640}
4641
4642/*
4643 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4644 * @ha: SCSI driver HA context
4645 */
4646void
4647qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4648{
4649 struct qla_hw_data *ha = vha->hw;
4650 struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
4651 struct atio_from_isp *pkt;
4652 int cnt, i;
4653
4654 if (!vha->flags.online)
4655 return;
4656
4657 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4658 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4659 cnt = pkt->u.raw.entry_count;
4660
4661 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4662
4663 for (i = 0; i < cnt; i++) {
4664 ha->tgt.atio_ring_index++;
4665 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4666 ha->tgt.atio_ring_index = 0;
4667 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4668 } else
4669 ha->tgt.atio_ring_ptr++;
4670
4671 pkt->u.raw.signature = ATIO_PROCESSED;
4672 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4673 }
4674 wmb();
4675 }
4676
4677 /* Adjust ring index */
4678 WRT_REG_DWORD(&reg->atio_q_out, ha->tgt.atio_ring_index);
4679}
4680
4681void
4682qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg)
4683{
4684 struct qla_hw_data *ha = vha->hw;
4685
4686/* FIXME: atio_q in/out for ha->mqenable=1..? */
4687 if (ha->mqenable) {
4688#if 0
4689 WRT_REG_DWORD(&reg->isp25mq.atio_q_in, 0);
4690 WRT_REG_DWORD(&reg->isp25mq.atio_q_out, 0);
4691 RD_REG_DWORD(&reg->isp25mq.atio_q_out);
4692#endif
4693 } else {
4694 /* Setup APTIO registers for target mode */
4695 WRT_REG_DWORD(&reg->isp24.atio_q_in, 0);
4696 WRT_REG_DWORD(&reg->isp24.atio_q_out, 0);
4697 RD_REG_DWORD(&reg->isp24.atio_q_out);
4698 }
4699}
4700
4701void
4702qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4703{
4704 struct qla_hw_data *ha = vha->hw;
4705
4706 if (qla_tgt_mode_enabled(vha)) {
4707 if (!ha->tgt.saved_set) {
4708 /* We save only once */
4709 ha->tgt.saved_exchange_count = nv->exchange_count;
4710 ha->tgt.saved_firmware_options_1 =
4711 nv->firmware_options_1;
4712 ha->tgt.saved_firmware_options_2 =
4713 nv->firmware_options_2;
4714 ha->tgt.saved_firmware_options_3 =
4715 nv->firmware_options_3;
4716 ha->tgt.saved_set = 1;
4717 }
4718
4719 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4720
4721 /* Enable target mode */
4722 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4723
4724 /* Disable ini mode, if requested */
4725 if (!qla_ini_mode_enabled(vha))
4726 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4727
4728 /* Disable Full Login after LIP */
4729 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4730 /* Enable initial LIP */
4731 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4732 /* Enable FC tapes support */
4733 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4734 /* Disable Full Login after LIP */
4735 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4736 /* Enable target PRLI control */
4737 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4738 } else {
4739 if (ha->tgt.saved_set) {
4740 nv->exchange_count = ha->tgt.saved_exchange_count;
4741 nv->firmware_options_1 =
4742 ha->tgt.saved_firmware_options_1;
4743 nv->firmware_options_2 =
4744 ha->tgt.saved_firmware_options_2;
4745 nv->firmware_options_3 =
4746 ha->tgt.saved_firmware_options_3;
4747 }
4748 return;
4749 }
4750
4751 /* out-of-order frames reassembly */
4752 nv->firmware_options_3 |= BIT_6|BIT_9;
4753
4754 if (ha->tgt.enable_class_2) {
4755 if (vha->flags.init_done)
4756 fc_host_supported_classes(vha->host) =
4757 FC_COS_CLASS2 | FC_COS_CLASS3;
4758
4759 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4760 } else {
4761 if (vha->flags.init_done)
4762 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4763
4764 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4765 }
4766}
4767
4768void
4769qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4770 struct init_cb_24xx *icb)
4771{
4772 struct qla_hw_data *ha = vha->hw;
4773
4774 if (ha->tgt.node_name_set) {
4775 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4776 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4777 }
4778}
4779
4780int
4781qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4782 struct sts_entry_24xx *pkt)
4783{
4784 switch (pkt->entry_type) {
4785 case ABTS_RECV_24XX:
4786 case ABTS_RESP_24XX:
4787 case CTIO_TYPE7:
4788 case NOTIFY_ACK_TYPE:
4789 return 1;
4790 default:
4791 return 0;
4792 }
4793}
4794
4795void
4796qlt_modify_vp_config(struct scsi_qla_host *vha,
4797 struct vp_config_entry_24xx *vpmod)
4798{
4799 if (qla_tgt_mode_enabled(vha))
4800 vpmod->options_idx1 &= ~BIT_5;
4801 /* Disable ini mode, if requested */
4802 if (!qla_ini_mode_enabled(vha))
4803 vpmod->options_idx1 &= ~BIT_4;
4804}
4805
4806void
4807qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4808{
4809 if (!QLA_TGT_MODE_ENABLED())
4810 return;
4811
4812 mutex_init(&ha->tgt.tgt_mutex);
4813 mutex_init(&ha->tgt.tgt_host_action_mutex);
4814 qlt_clear_mode(base_vha);
4815}
4816
4817int
4818qlt_mem_alloc(struct qla_hw_data *ha)
4819{
4820 if (!QLA_TGT_MODE_ENABLED())
4821 return 0;
4822
4823 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4824 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4825 if (!ha->tgt.tgt_vp_map)
4826 return -ENOMEM;
4827
4828 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4829 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4830 &ha->tgt.atio_dma, GFP_KERNEL);
4831 if (!ha->tgt.atio_ring) {
4832 kfree(ha->tgt.tgt_vp_map);
4833 return -ENOMEM;
4834 }
4835 return 0;
4836}
4837
4838void
4839qlt_mem_free(struct qla_hw_data *ha)
4840{
4841 if (!QLA_TGT_MODE_ENABLED())
4842 return;
4843
4844 if (ha->tgt.atio_ring) {
4845 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4846 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4847 ha->tgt.atio_dma);
4848 }
4849 kfree(ha->tgt.tgt_vp_map);
4850}
4851
4852/* vport_slock to be held by the caller */
4853void
4854qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4855{
4856 if (!QLA_TGT_MODE_ENABLED())
4857 return;
4858
4859 switch (cmd) {
4860 case SET_VP_IDX:
4861 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4862 break;
4863 case SET_AL_PA:
4864 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4865 break;
4866 case RESET_VP_IDX:
4867 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4868 break;
4869 case RESET_AL_PA:
4870 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4871 break;
4872 }
4873}
4874
4875static int __init qlt_parse_ini_mode(void)
4876{
4877 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4878 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4879 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4880 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4881 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4882 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4883 else
4884 return false;
4885
4886 return true;
4887}
4888
4889int __init qlt_init(void)
4890{
4891 int ret;
4892
4893 if (!qlt_parse_ini_mode()) {
4894 ql_log(ql_log_fatal, NULL, 0xe06b,
4895 "qlt_parse_ini_mode() failed\n");
4896 return -EINVAL;
4897 }
4898
4899 if (!QLA_TGT_MODE_ENABLED())
4900 return 0;
4901
4902 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4903 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4904 NULL);
4905 if (!qla_tgt_cmd_cachep) {
4906 ql_log(ql_log_fatal, NULL, 0xe06c,
4907 "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4908 return -ENOMEM;
4909 }
4910
4911 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4912 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4913 qla_tgt_mgmt_cmd), 0, NULL);
4914 if (!qla_tgt_mgmt_cmd_cachep) {
4915 ql_log(ql_log_fatal, NULL, 0xe06d,
4916 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4917 ret = -ENOMEM;
4918 goto out;
4919 }
4920
4921 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4922 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4923 if (!qla_tgt_mgmt_cmd_mempool) {
4924 ql_log(ql_log_fatal, NULL, 0xe06e,
4925 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4926 ret = -ENOMEM;
4927 goto out_mgmt_cmd_cachep;
4928 }
4929
4930 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4931 if (!qla_tgt_wq) {
4932 ql_log(ql_log_fatal, NULL, 0xe06f,
4933 "alloc_workqueue for qla_tgt_wq failed\n");
4934 ret = -ENOMEM;
4935 goto out_cmd_mempool;
4936 }
4937 /*
4938 * Return 1 to signal that initiator-mode is being disabled
4939 */
4940 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4941
4942out_cmd_mempool:
4943 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4944out_mgmt_cmd_cachep:
4945 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4946out:
4947 kmem_cache_destroy(qla_tgt_cmd_cachep);
4948 return ret;
4949}
4950
4951void qlt_exit(void)
4952{
4953 if (!QLA_TGT_MODE_ENABLED())
4954 return;
4955
4956 destroy_workqueue(qla_tgt_wq);
4957 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4958 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4959 kmem_cache_destroy(qla_tgt_cmd_cachep);
4960}
Linux 6.x block layer and io_uring tree(s)