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[SCSI] qla2xxx: Ramp down queue depth for attached SCSI devices when driver resources...
[mirror_ubuntu-artful-kernel.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 */
6efb3c0a 76#define FCP_PTA_ACA 4 /* auto. contingent allegiance */
2d70c103
NB		 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() */
fa492630 1032static void qlt_release(struct qla_tgt *tgt)
2d70c103
NB		 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;
06e97b48 1267 struct se_session *se_sess = sess->se_sess;
2d70c103 1268 struct qla_tgt_mgmt_cmd *mcmd;
06e97b48
SH		 1269 struct se_cmd *se_cmd;
1270 u32 lun = 0;
2d70c103 1271 int rc;
06e97b48
SH		 1272 bool found_lun = false;
1273
1274 spin_lock(&se_sess->sess_cmd_lock);
1275 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1276 struct qla_tgt_cmd *cmd =
1277 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1278 if (cmd->tag == abts->exchange_addr_to_abort) {
1279 lun = cmd->unpacked_lun;
1280 found_lun = true;
1281 break;
1282 }
1283 }
1284 spin_unlock(&se_sess->sess_cmd_lock);
1285
1286 if (!found_lun)
1287 return -ENOENT;
2d70c103
NB		 1288
1289 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1290 "qla_target(%d): task abort (tag=%d)\n",
1291 vha->vp_idx, abts->exchange_addr_to_abort);
1292
1293 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1294 if (mcmd == NULL) {
1295 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1296 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1297 vha->vp_idx, __func__);
1298 return -ENOMEM;
1299 }
1300 memset(mcmd, 0, sizeof(*mcmd));
1301
1302 mcmd->sess = sess;
1303 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1304
06e97b48 1305 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
2d70c103
NB		 1306 abts->exchange_addr_to_abort);
1307 if (rc != 0) {
1308 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1309 "qla_target(%d): tgt_ops->handle_tmr()"
1310 " failed: %d", vha->vp_idx, rc);
1311 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1312 return -EFAULT;
1313 }
1314
1315 return 0;
1316}
1317
1318/*
1319 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1320 */
1321static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1322 struct abts_recv_from_24xx *abts)
1323{
1324 struct qla_hw_data *ha = vha->hw;
1325 struct qla_tgt_sess *sess;
1326 uint32_t tag = abts->exchange_addr_to_abort;
1327 uint8_t s_id[3];
1328 int rc;
1329
1330 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1331 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1332 "qla_target(%d): ABTS: Abort Sequence not "
1333 "supported\n", vha->vp_idx);
1334 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1335 return;
1336 }
1337
1338 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1339 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1340 "qla_target(%d): ABTS: Unknown Exchange "
1341 "Address received\n", vha->vp_idx);
1342 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1343 return;
1344 }
1345
1346 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1347 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1348 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1349 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1350 le32_to_cpu(abts->fcp_hdr_le.parameter));
1351
1352 s_id[0] = abts->fcp_hdr_le.s_id[2];
1353 s_id[1] = abts->fcp_hdr_le.s_id[1];
1354 s_id[2] = abts->fcp_hdr_le.s_id[0];
1355
1356 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1357 if (!sess) {
1358 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1359 "qla_target(%d): task abort for non-existant session\n",
1360 vha->vp_idx);
1361 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1362 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1363 if (rc != 0) {
1364 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1365 false);
1366 }
1367 return;
1368 }
1369
1370 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1371 if (rc != 0) {
1372 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1373 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1374 vha->vp_idx, rc);
1375 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1376 return;
1377 }
1378}
1379
1380/*
1381 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1382 */
1383static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1384 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1385{
1386 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1387 struct ctio7_to_24xx *ctio;
1388
1389 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1390 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1391 ha, atio, resp_code);
1392
1393 /* Send marker if required */
1394 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1395 return;
1396
1397 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1398 if (ctio == NULL) {
1399 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1400 "qla_target(%d): %s failed: unable to allocate "
1401 "request packet\n", ha->vp_idx, __func__);
1402 return;
1403 }
1404
1405 ctio->entry_type = CTIO_TYPE7;
1406 ctio->entry_count = 1;
1407 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1408 ctio->nport_handle = mcmd->sess->loop_id;
1409 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1410 ctio->vp_index = ha->vp_idx;
1411 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1412 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1413 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1414 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1415 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1416 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1417 CTIO7_FLAGS_SEND_STATUS);
1418 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1419 ctio->u.status1.scsi_status =
1420 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1421 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
e4b11b89 1422 ctio->u.status1.sense_data[0] = resp_code;
2d70c103
NB		 1423
1424 qla2x00_start_iocbs(ha, ha->req);
1425}
1426
1427void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1428{
1429 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1430}
1431EXPORT_SYMBOL(qlt_free_mcmd);
1432
1433/* callback from target fabric module code */
1434void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1435{
1436 struct scsi_qla_host *vha = mcmd->sess->vha;
1437 struct qla_hw_data *ha = vha->hw;
1438 unsigned long flags;
1439
1440 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1441 "TM response mcmd (%p) status %#x state %#x",
1442 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1443
1444 spin_lock_irqsave(&ha->hardware_lock, flags);
1445 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1446 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1447 0, 0, 0, 0, 0, 0);
1448 else {
1449 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1450 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1451 mcmd->fc_tm_rsp, false);
1452 else
1453 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1454 mcmd->fc_tm_rsp);
1455 }
1456 /*
1457 * Make the callback for ->free_mcmd() to queue_work() and invoke
1458 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1459 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1460 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1461 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1462 * qlt_xmit_tm_rsp() returns here..
1463 */
1464 ha->tgt.tgt_ops->free_mcmd(mcmd);
1465 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1466}
1467EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1468
1469/* No locks */
1470static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1471{
1472 struct qla_tgt_cmd *cmd = prm->cmd;
1473
1474 BUG_ON(cmd->sg_cnt == 0);
1475
1476 prm->sg = (struct scatterlist *)cmd->sg;
1477 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1478 cmd->sg_cnt, cmd->dma_data_direction);
1479 if (unlikely(prm->seg_cnt == 0))
1480 goto out_err;
1481
1482 prm->cmd->sg_mapped = 1;
1483
1484 /*
1485 * If greater than four sg entries then we need to allocate
1486 * the continuation entries
1487 */
1488 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1489 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1490 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1491
1492 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1493 prm->seg_cnt, prm->req_cnt);
1494 return 0;
1495
1496out_err:
1497 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1498 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1499 0, prm->cmd->sg_cnt);
1500 return -1;
1501}
1502
1503static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1504 struct qla_tgt_cmd *cmd)
1505{
1506 struct qla_hw_data *ha = vha->hw;
1507
1508 BUG_ON(!cmd->sg_mapped);
1509 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1510 cmd->sg_mapped = 0;
1511}
1512
1513static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1514 uint32_t req_cnt)
1515{
1516 struct qla_hw_data *ha = vha->hw;
1517 device_reg_t __iomem *reg = ha->iobase;
1518 uint32_t cnt;
1519
1520 if (vha->req->cnt < (req_cnt + 2)) {
1521 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1522
1523 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1524 "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1525 "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1526 vha->req->ring_index, vha->req->cnt, req_cnt);
1527 if (vha->req->ring_index < cnt)
1528 vha->req->cnt = cnt - vha->req->ring_index;
1529 else
1530 vha->req->cnt = vha->req->length -
1531 (vha->req->ring_index - cnt);
1532 }
1533
1534 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1535 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1536 "qla_target(%d): There is no room in the "
1537 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1538 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1539 vha->req->cnt, req_cnt);
1540 return -EAGAIN;
1541 }
1542 vha->req->cnt -= req_cnt;
1543
1544 return 0;
1545}
1546
1547/*
1548 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1549 */
1550static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1551{
1552 /* Adjust ring index. */
1553 vha->req->ring_index++;
1554 if (vha->req->ring_index == vha->req->length) {
1555 vha->req->ring_index = 0;
1556 vha->req->ring_ptr = vha->req->ring;
1557 } else {
1558 vha->req->ring_ptr++;
1559 }
1560 return (cont_entry_t *)vha->req->ring_ptr;
1561}
1562
1563/* ha->hardware_lock supposed to be held on entry */
1564static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1565{
1566 struct qla_hw_data *ha = vha->hw;
1567 uint32_t h;
1568
1569 h = ha->tgt.current_handle;
1570 /* always increment cmd handle */
1571 do {
1572 ++h;
8d93f550 1573 if (h > DEFAULT_OUTSTANDING_COMMANDS)
2d70c103
NB		 1574 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1575 if (h == ha->tgt.current_handle) {
1576 ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1577 "qla_target(%d): Ran out of "
1578 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1579 h = QLA_TGT_NULL_HANDLE;
1580 break;
1581 }
1582 } while ((h == QLA_TGT_NULL_HANDLE) ||
1583 (h == QLA_TGT_SKIP_HANDLE) ||
1584 (ha->tgt.cmds[h-1] != NULL));
1585
1586 if (h != QLA_TGT_NULL_HANDLE)
1587 ha->tgt.current_handle = h;
1588
1589 return h;
1590}
1591
1592/* ha->hardware_lock supposed to be held on entry */
1593static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1594 struct scsi_qla_host *vha)
1595{
1596 uint32_t h;
1597 struct ctio7_to_24xx *pkt;
1598 struct qla_hw_data *ha = vha->hw;
1599 struct atio_from_isp *atio = &prm->cmd->atio;
1600
1601 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1602 prm->pkt = pkt;
1603 memset(pkt, 0, sizeof(*pkt));
1604
1605 pkt->entry_type = CTIO_TYPE7;
1606 pkt->entry_count = (uint8_t)prm->req_cnt;
1607 pkt->vp_index = vha->vp_idx;
1608
1609 h = qlt_make_handle(vha);
1610 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1611 /*
1612 * CTIO type 7 from the firmware doesn't provide a way to
1613 * know the initiator's LOOP ID, hence we can't find
1614 * the session and, so, the command.
1615 */
1616 return -EAGAIN;
1617 } else
1618 ha->tgt.cmds[h-1] = prm->cmd;
1619
1620 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1621 pkt->nport_handle = prm->cmd->loop_id;
1622 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1623 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1624 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1625 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1626 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1627 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1628 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1629 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1630
1631 ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1632 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1633 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1634 le16_to_cpu(pkt->u.status0.ox_id));
1635 return 0;
1636}
1637
1638/*
1639 * ha->hardware_lock supposed to be held on entry. We have already made sure
1640 * that there is sufficient amount of request entries to not drop it.
1641 */
1642static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1643 struct scsi_qla_host *vha)
1644{
1645 int cnt;
1646 uint32_t *dword_ptr;
1647 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1648
1649 /* Build continuation packets */
1650 while (prm->seg_cnt > 0) {
1651 cont_a64_entry_t *cont_pkt64 =
1652 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1653
1654 /*
1655 * Make sure that from cont_pkt64 none of
1656 * 64-bit specific fields used for 32-bit
1657 * addressing. Cast to (cont_entry_t *) for
1658 * that.
1659 */
1660
1661 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1662
1663 cont_pkt64->entry_count = 1;
1664 cont_pkt64->sys_define = 0;
1665
1666 if (enable_64bit_addressing) {
1667 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1668 dword_ptr =
1669 (uint32_t *)&cont_pkt64->dseg_0_address;
1670 } else {
1671 cont_pkt64->entry_type = CONTINUE_TYPE;
1672 dword_ptr =
1673 (uint32_t *)&((cont_entry_t *)
1674 cont_pkt64)->dseg_0_address;
1675 }
1676
1677 /* Load continuation entry data segments */
1678 for (cnt = 0;
1679 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1680 cnt++, prm->seg_cnt--) {
1681 *dword_ptr++ =
1682 cpu_to_le32(pci_dma_lo32
1683 (sg_dma_address(prm->sg)));
1684 if (enable_64bit_addressing) {
1685 *dword_ptr++ =
1686 cpu_to_le32(pci_dma_hi32
1687 (sg_dma_address
1688 (prm->sg)));
1689 }
1690 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1691
1692 ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1693 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1694 (long long unsigned int)
1695 pci_dma_hi32(sg_dma_address(prm->sg)),
1696 (long long unsigned int)
1697 pci_dma_lo32(sg_dma_address(prm->sg)),
1698 (int)sg_dma_len(prm->sg));
1699
1700 prm->sg = sg_next(prm->sg);
1701 }
1702 }
1703}
1704
1705/*
1706 * ha->hardware_lock supposed to be held on entry. We have already made sure
1707 * that there is sufficient amount of request entries to not drop it.
1708 */
1709static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1710 struct scsi_qla_host *vha)
1711{
1712 int cnt;
1713 uint32_t *dword_ptr;
1714 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1715 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1716
1717 ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1718 "iocb->scsi_status=%x, iocb->flags=%x\n",
1719 le16_to_cpu(pkt24->u.status0.scsi_status),
1720 le16_to_cpu(pkt24->u.status0.flags));
1721
1722 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1723
1724 /* Setup packet address segment pointer */
1725 dword_ptr = pkt24->u.status0.dseg_0_address;
1726
1727 /* Set total data segment count */
1728 if (prm->seg_cnt)
1729 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1730
1731 if (prm->seg_cnt == 0) {
1732 /* No data transfer */
1733 *dword_ptr++ = 0;
1734 *dword_ptr = 0;
1735 return;
1736 }
1737
1738 /* If scatter gather */
1739 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1740
1741 /* Load command entry data segments */
1742 for (cnt = 0;
1743 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1744 cnt++, prm->seg_cnt--) {
1745 *dword_ptr++ =
1746 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1747 if (enable_64bit_addressing) {
1748 *dword_ptr++ =
1749 cpu_to_le32(pci_dma_hi32(
1750 sg_dma_address(prm->sg)));
1751 }
1752 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1753
1754 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1755 "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1756 (long long unsigned int)pci_dma_hi32(sg_dma_address(
1757 prm->sg)),
1758 (long long unsigned int)pci_dma_lo32(sg_dma_address(
1759 prm->sg)),
1760 (int)sg_dma_len(prm->sg));
1761
1762 prm->sg = sg_next(prm->sg);
1763 }
1764
1765 qlt_load_cont_data_segments(prm, vha);
1766}
1767
1768static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1769{
1770 return cmd->bufflen > 0;
1771}
1772
1773/*
1774 * Called without ha->hardware_lock held
1775 */
1776static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1777 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1778 uint32_t *full_req_cnt)
1779{
1780 struct qla_tgt *tgt = cmd->tgt;
1781 struct scsi_qla_host *vha = tgt->vha;
1782 struct qla_hw_data *ha = vha->hw;
1783 struct se_cmd *se_cmd = &cmd->se_cmd;
1784
1785 if (unlikely(cmd->aborted)) {
1786 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1787 "qla_target(%d): terminating exchange "
1788 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1789 se_cmd, cmd->tag);
1790
1791 cmd->state = QLA_TGT_STATE_ABORTED;
1792
1793 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1794
1795 /* !! At this point cmd could be already freed !! */
1796 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1797 }
1798
1799 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1800 vha->vp_idx, cmd->tag);
1801
1802 prm->cmd = cmd;
1803 prm->tgt = tgt;
1804 prm->rq_result = scsi_status;
1805 prm->sense_buffer = &cmd->sense_buffer[0];
1806 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1807 prm->sg = NULL;
1808 prm->seg_cnt = -1;
1809 prm->req_cnt = 1;
1810 prm->add_status_pkt = 0;
1811
1812 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1813 prm->rq_result, xmit_type);
1814
1815 /* Send marker if required */
1816 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1817 return -EFAULT;
1818
1819 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1820
1821 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1822 if (qlt_pci_map_calc_cnt(prm) != 0)
1823 return -EAGAIN;
1824 }
1825
1826 *full_req_cnt = prm->req_cnt;
1827
1828 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1829 prm->residual = se_cmd->residual_count;
1830 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1831 "Residual underflow: %d (tag %d, "
1832 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1833 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1834 cmd->bufflen, prm->rq_result);
1835 prm->rq_result |= SS_RESIDUAL_UNDER;
1836 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1837 prm->residual = se_cmd->residual_count;
1838 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1839 "Residual overflow: %d (tag %d, "
1840 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1841 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1842 cmd->bufflen, prm->rq_result);
1843 prm->rq_result |= SS_RESIDUAL_OVER;
1844 }
1845
1846 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1847 /*
1848 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1849 * ignored in *xmit_response() below
1850 */
1851 if (qlt_has_data(cmd)) {
1852 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1853 (IS_FWI2_CAPABLE(ha) &&
1854 (prm->rq_result != 0))) {
1855 prm->add_status_pkt = 1;
1856 (*full_req_cnt)++;
1857 }
1858 }
1859 }
1860
1861 ql_dbg(ql_dbg_tgt, vha, 0xe016,
1862 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1863 prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1864
1865 return 0;
1866}
1867
1868static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1869 struct qla_tgt_cmd *cmd, int sending_sense)
1870{
1871 if (ha->tgt.enable_class_2)
1872 return 0;
1873
1874 if (sending_sense)
1875 return cmd->conf_compl_supported;
1876 else
1877 return ha->tgt.enable_explicit_conf &&
1878 cmd->conf_compl_supported;
1879}
1880
1881#ifdef CONFIG_QLA_TGT_DEBUG_SRR
1882/*
1883 * Original taken from the XFS code
1884 */
1885static unsigned long qlt_srr_random(void)
1886{
1887 static int Inited;
1888 static unsigned long RandomValue;
1889 static DEFINE_SPINLOCK(lock);
1890 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1891 register long rv;
1892 register long lo;
1893 register long hi;
1894 unsigned long flags;
1895
1896 spin_lock_irqsave(&lock, flags);
1897 if (!Inited) {
1898 RandomValue = jiffies;
1899 Inited = 1;
1900 }
1901 rv = RandomValue;
1902 hi = rv / 127773;
1903 lo = rv % 127773;
1904 rv = 16807 * lo - 2836 * hi;
1905 if (rv <= 0)
1906 rv += 2147483647;
1907 RandomValue = rv;
1908 spin_unlock_irqrestore(&lock, flags);
1909 return rv;
1910}
1911
1912static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1913{
1914#if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1915 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1916 == 50) {
1917 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1918 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1919 "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1920 }
1921#endif
1922 /*
1923 * It's currently not possible to simulate SRRs for FCP_WRITE without
1924 * a physical link layer failure, so don't even try here..
1925 */
1926 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1927 return;
1928
1929 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1930 ((qlt_srr_random() % 100) == 20)) {
1931 int i, leave = 0;
1932 unsigned int tot_len = 0;
1933
1934 while (leave == 0)
1935 leave = qlt_srr_random() % cmd->sg_cnt;
1936
1937 for (i = 0; i < leave; i++)
1938 tot_len += cmd->sg[i].length;
1939
1940 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1941 "Cutting cmd %p (tag %d) buffer"
1942 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1943 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1944 cmd->bufflen, cmd->sg_cnt);
1945
1946 cmd->bufflen = tot_len;
1947 cmd->sg_cnt = leave;
1948 }
1949
1950 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1951 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1952
1953 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1954 "Cutting cmd %p (tag %d) buffer head "
1955 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1956 cmd->bufflen);
1957 if (offset == 0)
1958 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1959 else if (qlt_set_data_offset(cmd, offset)) {
1960 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1961 "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1962 }
1963 }
1964}
1965#else
1966static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1967{}
1968#endif
1969
1970static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1971 struct qla_tgt_prm *prm)
1972{
1973 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1974 (uint32_t)sizeof(ctio->u.status1.sense_data));
1975 ctio->u.status0.flags |=
1976 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1977 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1978 ctio->u.status0.flags |= __constant_cpu_to_le16(
1979 CTIO7_FLAGS_EXPLICIT_CONFORM |
1980 CTIO7_FLAGS_CONFORM_REQ);
1981 }
1982 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1983 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1984 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1985 int i;
1986
1987 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1988 if (prm->cmd->se_cmd.scsi_status != 0) {
1989 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1990 "Skipping EXPLICIT_CONFORM and "
1991 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1992 "non GOOD status\n");
1993 goto skip_explict_conf;
1994 }
1995 ctio->u.status1.flags |= __constant_cpu_to_le16(
1996 CTIO7_FLAGS_EXPLICIT_CONFORM |
1997 CTIO7_FLAGS_CONFORM_REQ);
1998 }
1999skip_explict_conf:
2000 ctio->u.status1.flags &=
2001 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2002 ctio->u.status1.flags |=
2003 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2004 ctio->u.status1.scsi_status |=
2005 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
2006 ctio->u.status1.sense_length =
2007 cpu_to_le16(prm->sense_buffer_len);
2008 for (i = 0; i < prm->sense_buffer_len/4; i++)
2009 ((uint32_t *)ctio->u.status1.sense_data)[i] =
2010 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2011#if 0
2012 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2013 static int q;
2014 if (q < 10) {
2015 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2016 "qla_target(%d): %d bytes of sense "
2017 "lost", prm->tgt->ha->vp_idx,
2018 prm->sense_buffer_len % 4);
2019 q++;
2020 }
2021 }
2022#endif
2023 } else {
2024 ctio->u.status1.flags &=
2025 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2026 ctio->u.status1.flags |=
2027 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2028 ctio->u.status1.sense_length = 0;
2029 memset(ctio->u.status1.sense_data, 0,
2030 sizeof(ctio->u.status1.sense_data));
2031 }
2032
2033 /* Sense with len > 24, is it possible ??? */
2034}
2035
2036/*
2037 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2038 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2039 */
2040int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2041 uint8_t scsi_status)
2042{
2043 struct scsi_qla_host *vha = cmd->vha;
2044 struct qla_hw_data *ha = vha->hw;
2045 struct ctio7_to_24xx *pkt;
2046 struct qla_tgt_prm prm;
2047 uint32_t full_req_cnt = 0;
2048 unsigned long flags = 0;
2049 int res;
2050
2051 memset(&prm, 0, sizeof(prm));
2052 qlt_check_srr_debug(cmd, &xmit_type);
2053
2054 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2055 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
2056 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
2057 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
2058
2059 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2060 &full_req_cnt);
2061 if (unlikely(res != 0)) {
2062 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2063 return 0;
2064
2065 return res;
2066 }
2067
2068 spin_lock_irqsave(&ha->hardware_lock, flags);
2069
2070 /* Does F/W have an IOCBs for this request */
2071 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2072 if (unlikely(res))
2073 goto out_unmap_unlock;
2074
2075 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2076 if (unlikely(res != 0))
2077 goto out_unmap_unlock;
2078
2079
2080 pkt = (struct ctio7_to_24xx *)prm.pkt;
2081
2082 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2083 pkt->u.status0.flags |=
2084 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2085 CTIO7_FLAGS_STATUS_MODE_0);
2086
2087 qlt_load_data_segments(&prm, vha);
2088
2089 if (prm.add_status_pkt == 0) {
2090 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2091 pkt->u.status0.scsi_status =
2092 cpu_to_le16(prm.rq_result);
2093 pkt->u.status0.residual =
2094 cpu_to_le32(prm.residual);
2095 pkt->u.status0.flags |= __constant_cpu_to_le16(
2096 CTIO7_FLAGS_SEND_STATUS);
2097 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2098 pkt->u.status0.flags |=
2099 __constant_cpu_to_le16(
2100 CTIO7_FLAGS_EXPLICIT_CONFORM |
2101 CTIO7_FLAGS_CONFORM_REQ);
2102 }
2103 }
2104
2105 } else {
2106 /*
2107 * We have already made sure that there is sufficient
2108 * amount of request entries to not drop HW lock in
2109 * req_pkt().
2110 */
2111 struct ctio7_to_24xx *ctio =
2112 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2113
2114 ql_dbg(ql_dbg_tgt, vha, 0xe019,
2115 "Building additional status packet\n");
2116
2117 memcpy(ctio, pkt, sizeof(*ctio));
2118 ctio->entry_count = 1;
2119 ctio->dseg_count = 0;
2120 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2121 CTIO7_FLAGS_DATA_IN);
2122
2123 /* Real finish is ctio_m1's finish */
2124 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2125 pkt->u.status0.flags |= __constant_cpu_to_le16(
2126 CTIO7_FLAGS_DONT_RET_CTIO);
2127 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2128 &prm);
2129 pr_debug("Status CTIO7: %p\n", ctio);
2130 }
2131 } else
2132 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2133
2134
2135 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2136
2137 ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2138 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2139 pkt, scsi_status);
2140
2141 qla2x00_start_iocbs(vha, vha->req);
2142 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2143
2144 return 0;
2145
2146out_unmap_unlock:
2147 if (cmd->sg_mapped)
2148 qlt_unmap_sg(vha, cmd);
2149 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2150
2151 return res;
2152}
2153EXPORT_SYMBOL(qlt_xmit_response);
2154
2155int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2156{
2157 struct ctio7_to_24xx *pkt;
2158 struct scsi_qla_host *vha = cmd->vha;
2159 struct qla_hw_data *ha = vha->hw;
2160 struct qla_tgt *tgt = cmd->tgt;
2161 struct qla_tgt_prm prm;
2162 unsigned long flags;
2163 int res = 0;
2164
2165 memset(&prm, 0, sizeof(prm));
2166 prm.cmd = cmd;
2167 prm.tgt = tgt;
2168 prm.sg = NULL;
2169 prm.req_cnt = 1;
2170
2171 /* Send marker if required */
2172 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2173 return -EIO;
2174
2175 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2176 (int)vha->vp_idx);
2177
2178 /* Calculate number of entries and segments required */
2179 if (qlt_pci_map_calc_cnt(&prm) != 0)
2180 return -EAGAIN;
2181
2182 spin_lock_irqsave(&ha->hardware_lock, flags);
2183
2184 /* Does F/W have an IOCBs for this request */
2185 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2186 if (res != 0)
2187 goto out_unlock_free_unmap;
2188
2189 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2190 if (unlikely(res != 0))
2191 goto out_unlock_free_unmap;
2192 pkt = (struct ctio7_to_24xx *)prm.pkt;
2193 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2194 CTIO7_FLAGS_STATUS_MODE_0);
2195 qlt_load_data_segments(&prm, vha);
2196
2197 cmd->state = QLA_TGT_STATE_NEED_DATA;
2198
2199 qla2x00_start_iocbs(vha, vha->req);
2200 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2201
2202 return res;
2203
2204out_unlock_free_unmap:
2205 if (cmd->sg_mapped)
2206 qlt_unmap_sg(vha, cmd);
2207 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2208
2209 return res;
2210}
2211EXPORT_SYMBOL(qlt_rdy_to_xfer);
2212
2213/* If hardware_lock held on entry, might drop it, then reaquire */
2214/* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2215static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2216 struct qla_tgt_cmd *cmd,
2217 struct atio_from_isp *atio)
2218{
2219 struct ctio7_to_24xx *ctio24;
2220 struct qla_hw_data *ha = vha->hw;
2221 request_t *pkt;
2222 int ret = 0;
2223
2224 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2225
2226 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2227 if (pkt == NULL) {
2228 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2229 "qla_target(%d): %s failed: unable to allocate "
2230 "request packet\n", vha->vp_idx, __func__);
2231 return -ENOMEM;
2232 }
2233
2234 if (cmd != NULL) {
2235 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2236 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2237 "qla_target(%d): Terminating cmd %p with "
2238 "incorrect state %d\n", vha->vp_idx, cmd,
2239 cmd->state);
2240 } else
2241 ret = 1;
2242 }
2243
2244 pkt->entry_count = 1;
2245 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2246
2247 ctio24 = (struct ctio7_to_24xx *)pkt;
2248 ctio24->entry_type = CTIO_TYPE7;
2249 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2250 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2251 ctio24->vp_index = vha->vp_idx;
2252 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2253 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2254 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2255 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2256 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2257 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2258 CTIO7_FLAGS_TERMINATE);
2259 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2260
2261 /* Most likely, it isn't needed */
2262 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2263 &atio->u.isp24.fcp_cmnd.add_cdb[
2264 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2265 if (ctio24->u.status1.residual != 0)
2266 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2267
2268 qla2x00_start_iocbs(vha, vha->req);
2269 return ret;
2270}
2271
2272static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2273 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2274{
2275 unsigned long flags;
2276 int rc;
2277
2278 if (qlt_issue_marker(vha, ha_locked) < 0)
2279 return;
2280
2281 if (ha_locked) {
2282 rc = __qlt_send_term_exchange(vha, cmd, atio);
2283 goto done;
2284 }
2285 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2286 rc = __qlt_send_term_exchange(vha, cmd, atio);
2287 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2288done:
2289 if (rc == 1) {
2290 if (!ha_locked && !in_interrupt())
2291 msleep(250); /* just in case */
2292
2293 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2294 }
2295}
2296
2297void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2298{
2299 BUG_ON(cmd->sg_mapped);
2300
2301 if (unlikely(cmd->free_sg))
2302 kfree(cmd->sg);
2303 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2304}
2305EXPORT_SYMBOL(qlt_free_cmd);
2306
2307/* ha->hardware_lock supposed to be held on entry */
2308static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2309 struct qla_tgt_cmd *cmd, void *ctio)
2310{
2311 struct qla_tgt_srr_ctio *sc;
2312 struct qla_hw_data *ha = vha->hw;
2313 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2314 struct qla_tgt_srr_imm *imm;
2315
2316 tgt->ctio_srr_id++;
2317
2318 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2319 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2320
2321 if (!ctio) {
2322 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2323 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2324 vha->vp_idx);
2325 return -EINVAL;
2326 }
2327
2328 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2329 if (sc != NULL) {
2330 sc->cmd = cmd;
2331 /* IRQ is already OFF */
2332 spin_lock(&tgt->srr_lock);
2333 sc->srr_id = tgt->ctio_srr_id;
2334 list_add_tail(&sc->srr_list_entry,
2335 &tgt->srr_ctio_list);
2336 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2337 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2338 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2339 int found = 0;
2340 list_for_each_entry(imm, &tgt->srr_imm_list,
2341 srr_list_entry) {
2342 if (imm->srr_id == sc->srr_id) {
2343 found = 1;
2344 break;
2345 }
2346 }
2347 if (found) {
2348 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2349 "Scheduling srr work\n");
2350 schedule_work(&tgt->srr_work);
2351 } else {
2352 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2353 "qla_target(%d): imm_srr_id "
2354 "== ctio_srr_id (%d), but there is no "
2355 "corresponding SRR IMM, deleting CTIO "
2356 "SRR %p\n", vha->vp_idx,
2357 tgt->ctio_srr_id, sc);
2358 list_del(&sc->srr_list_entry);
2359 spin_unlock(&tgt->srr_lock);
2360
2361 kfree(sc);
2362 return -EINVAL;
2363 }
2364 }
2365 spin_unlock(&tgt->srr_lock);
2366 } else {
2367 struct qla_tgt_srr_imm *ti;
2368
2369 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2370 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2371 vha->vp_idx);
2372 spin_lock(&tgt->srr_lock);
2373 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2374 srr_list_entry) {
2375 if (imm->srr_id == tgt->ctio_srr_id) {
2376 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2377 "IMM SRR %p deleted (id %d)\n",
2378 imm, imm->srr_id);
2379 list_del(&imm->srr_list_entry);
2380 qlt_reject_free_srr_imm(vha, imm, 1);
2381 }
2382 }
2383 spin_unlock(&tgt->srr_lock);
2384
2385 return -ENOMEM;
2386 }
2387
2388 return 0;
2389}
2390
2391/*
2392 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2393 */
2394static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2395 struct qla_tgt_cmd *cmd, uint32_t status)
2396{
2397 int term = 0;
2398
2399 if (ctio != NULL) {
2400 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2401 term = !(c->flags &
2402 __constant_cpu_to_le16(OF_TERM_EXCH));
2403 } else
2404 term = 1;
2405
2406 if (term)
2407 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2408
2409 return term;
2410}
2411
2412/* ha->hardware_lock supposed to be held on entry */
2413static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2414 uint32_t handle)
2415{
2416 struct qla_hw_data *ha = vha->hw;
2417
2418 handle--;
2419 if (ha->tgt.cmds[handle] != NULL) {
2420 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2421 ha->tgt.cmds[handle] = NULL;
2422 return cmd;
2423 } else
2424 return NULL;
2425}
2426
2427/* ha->hardware_lock supposed to be held on entry */
2428static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2429 uint32_t handle, void *ctio)
2430{
2431 struct qla_tgt_cmd *cmd = NULL;
2432
2433 /* Clear out internal marks */
2434 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2435 CTIO_INTERMEDIATE_HANDLE_MARK);
2436
2437 if (handle != QLA_TGT_NULL_HANDLE) {
2438 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2439 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2440 "SKIP_HANDLE CTIO\n");
2441 return NULL;
2442 }
2443 /* handle-1 is actually used */
8d93f550 2444 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2d70c103
NB		 2445 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2446 "qla_target(%d): Wrong handle %x received\n",
2447 vha->vp_idx, handle);
2448 return NULL;
2449 }
2450 cmd = qlt_get_cmd(vha, handle);
2451 if (unlikely(cmd == NULL)) {
2452 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2453 "qla_target(%d): Suspicious: unable to "
2454 "find the command with handle %x\n", vha->vp_idx,
2455 handle);
2456 return NULL;
2457 }
2458 } else if (ctio != NULL) {
2459 /* We can't get loop ID from CTIO7 */
2460 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2461 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2462 "support NULL handles\n", vha->vp_idx);
2463 return NULL;
2464 }
2465
2466 return cmd;
2467}
2468
2469/*
2470 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2471 */
2472static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2473 uint32_t status, void *ctio)
2474{
2475 struct qla_hw_data *ha = vha->hw;
2476 struct se_cmd *se_cmd;
2477 struct target_core_fabric_ops *tfo;
2478 struct qla_tgt_cmd *cmd;
2479
2480 ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2481 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2482 vha->vp_idx, ctio, status, handle);
2483
2484 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2485 /* That could happen only in case of an error/reset/abort */
2486 if (status != CTIO_SUCCESS) {
2487 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2488 "Intermediate CTIO received"
2489 " (status %x)\n", status);
2490 }
2491 return;
2492 }
2493
2494 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
092e1dc3 2495 if (cmd == NULL)
2d70c103 2496 return;
092e1dc3 2497
2d70c103
NB		 2498 se_cmd = &cmd->se_cmd;
2499 tfo = se_cmd->se_tfo;
2500
2501 if (cmd->sg_mapped)
2502 qlt_unmap_sg(vha, cmd);
2503
2504 if (unlikely(status != CTIO_SUCCESS)) {
2505 switch (status & 0xFFFF) {
2506 case CTIO_LIP_RESET:
2507 case CTIO_TARGET_RESET:
2508 case CTIO_ABORTED:
2509 case CTIO_TIMEOUT:
2510 case CTIO_INVALID_RX_ID:
2511 /* They are OK */
2512 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2513 "qla_target(%d): CTIO with "
2514 "status %#x received, state %x, se_cmd %p, "
2515 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2516 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2517 status, cmd->state, se_cmd);
2518 break;
2519
2520 case CTIO_PORT_LOGGED_OUT:
2521 case CTIO_PORT_UNAVAILABLE:
2522 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2523 "qla_target(%d): CTIO with PORT LOGGED "
2524 "OUT (29) or PORT UNAVAILABLE (28) status %x "
2525 "received (state %x, se_cmd %p)\n", vha->vp_idx,
2526 status, cmd->state, se_cmd);
2527 break;
2528
2529 case CTIO_SRR_RECEIVED:
2530 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2531 "qla_target(%d): CTIO with SRR_RECEIVED"
2532 " status %x received (state %x, se_cmd %p)\n",
2533 vha->vp_idx, status, cmd->state, se_cmd);
2534 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2535 break;
2536 else
2537 return;
2538
2539 default:
2540 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2541 "qla_target(%d): CTIO with error status "
2542 "0x%x received (state %x, se_cmd %p\n",
2543 vha->vp_idx, status, cmd->state, se_cmd);
2544 break;
2545 }
2546
2547 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2548 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2549 return;
2550 }
2551
2552 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2553 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2554 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2555 int rx_status = 0;
2556
2557 cmd->state = QLA_TGT_STATE_DATA_IN;
2558
2559 if (unlikely(status != CTIO_SUCCESS))
2560 rx_status = -EIO;
2561 else
2562 cmd->write_data_transferred = 1;
2563
2564 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2565 "Data received, context %x, rx_status %d\n",
2566 0x0, rx_status);
2567
2568 ha->tgt.tgt_ops->handle_data(cmd);
2569 return;
2570 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2571 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2572 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2573 } else {
2574 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2575 "qla_target(%d): A command in state (%d) should "
2576 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2577 }
2578
2579 if (unlikely(status != CTIO_SUCCESS)) {
2580 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2581 dump_stack();
2582 }
2583
2584 ha->tgt.tgt_ops->free_cmd(cmd);
2585}
2586
2587/* ha->hardware_lock supposed to be held on entry */
2588/* called via callback from qla2xxx */
2589void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle)
2590{
2591 struct qla_hw_data *ha = vha->hw;
2592 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2593
2594 if (likely(tgt == NULL)) {
2595 ql_dbg(ql_dbg_tgt, vha, 0xe021,
2596 "CTIO, but target mode not enabled"
2597 " (ha %d %p handle %#x)", vha->vp_idx, ha, handle);
2598 return;
2599 }
2600
2601 tgt->irq_cmd_count++;
2602 qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL);
2603 tgt->irq_cmd_count--;
2604}
2605
2606static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2607 uint8_t task_codes)
2608{
2609 int fcp_task_attr;
2610
2611 switch (task_codes) {
2612 case ATIO_SIMPLE_QUEUE:
2613 fcp_task_attr = MSG_SIMPLE_TAG;
2614 break;
2615 case ATIO_HEAD_OF_QUEUE:
2616 fcp_task_attr = MSG_HEAD_TAG;
2617 break;
2618 case ATIO_ORDERED_QUEUE:
2619 fcp_task_attr = MSG_ORDERED_TAG;
2620 break;
2621 case ATIO_ACA_QUEUE:
2622 fcp_task_attr = MSG_ACA_TAG;
2623 break;
2624 case ATIO_UNTAGGED:
2625 fcp_task_attr = MSG_SIMPLE_TAG;
2626 break;
2627 default:
2628 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2629 "qla_target: unknown task code %x, use ORDERED instead\n",
2630 task_codes);
2631 fcp_task_attr = MSG_ORDERED_TAG;
2632 break;
2633 }
2634
2635 return fcp_task_attr;
2636}
2637
2638static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2639 uint8_t *);
2640/*
2641 * Process context for I/O path into tcm_qla2xxx code
2642 */
2643static void qlt_do_work(struct work_struct *work)
2644{
2645 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2646 scsi_qla_host_t *vha = cmd->vha;
2647 struct qla_hw_data *ha = vha->hw;
2648 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2649 struct qla_tgt_sess *sess = NULL;
2650 struct atio_from_isp *atio = &cmd->atio;
2651 unsigned char *cdb;
2652 unsigned long flags;
2653 uint32_t data_length;
2654 int ret, fcp_task_attr, data_dir, bidi = 0;
2655
2656 if (tgt->tgt_stop)
2657 goto out_term;
2658
2659 spin_lock_irqsave(&ha->hardware_lock, flags);
2660 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2661 atio->u.isp24.fcp_hdr.s_id);
e1013f14
RD		 2662 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2663 if (sess)
2664 kref_get(&sess->se_sess->sess_kref);
2d70c103
NB		 2665 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2666
2667 if (unlikely(!sess)) {
2668 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2669
2670 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2671 "qla_target(%d): Unable to find wwn login"
2672 " (s_id %x:%x:%x), trying to create it manually\n",
2673 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2674
2675 if (atio->u.raw.entry_count > 1) {
2676 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2677 "Dropping multy entry cmd %p\n", cmd);
2678 goto out_term;
2679 }
2680
2681 mutex_lock(&ha->tgt.tgt_mutex);
2682 sess = qlt_make_local_sess(vha, s_id);
2683 /* sess has an extra creation ref. */
2684 mutex_unlock(&ha->tgt.tgt_mutex);
2685
2686 if (!sess)
2687 goto out_term;
2688 }
2689
2690 cmd->sess = sess;
2691 cmd->loop_id = sess->loop_id;
2692 cmd->conf_compl_supported = sess->conf_compl_supported;
2693
2694 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2695 cmd->tag = atio->u.isp24.exchange_addr;
2696 cmd->unpacked_lun = scsilun_to_int(
2697 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2698
2699 if (atio->u.isp24.fcp_cmnd.rddata &&
2700 atio->u.isp24.fcp_cmnd.wrdata) {
2701 bidi = 1;
2702 data_dir = DMA_TO_DEVICE;
2703 } else if (atio->u.isp24.fcp_cmnd.rddata)
2704 data_dir = DMA_FROM_DEVICE;
2705 else if (atio->u.isp24.fcp_cmnd.wrdata)
2706 data_dir = DMA_TO_DEVICE;
2707 else
2708 data_dir = DMA_NONE;
2709
2710 fcp_task_attr = qlt_get_fcp_task_attr(vha,
2711 atio->u.isp24.fcp_cmnd.task_attr);
2712 data_length = be32_to_cpu(get_unaligned((uint32_t *)
2713 &atio->u.isp24.fcp_cmnd.add_cdb[
2714 atio->u.isp24.fcp_cmnd.add_cdb_len]));
2715
2716 ql_dbg(ql_dbg_tgt, vha, 0xe022,
2717 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2718 cmd, cmd->unpacked_lun, cmd->tag);
2719
2720 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2721 fcp_task_attr, data_dir, bidi);
2722 if (ret != 0)
2723 goto out_term;
2724 /*
2725 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2726 */
2727 ha->tgt.tgt_ops->put_sess(sess);
2728 return;
2729
2730out_term:
2731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2732 /*
fae9eaf8
RD		 2733 * cmd has not sent to target yet, so pass NULL as the second
2734 * argument to qlt_send_term_exchange() and free the memory here.
2d70c103
NB		 2735 */
2736 spin_lock_irqsave(&ha->hardware_lock, flags);
2737 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
fae9eaf8 2738 kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2d70c103
NB		 2739 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2740 if (sess)
2741 ha->tgt.tgt_ops->put_sess(sess);
2742}
2743
2744/* ha->hardware_lock supposed to be held on entry */
2745static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2746 struct atio_from_isp *atio)
2747{
2748 struct qla_hw_data *ha = vha->hw;
2749 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2750 struct qla_tgt_cmd *cmd;
2751
2752 if (unlikely(tgt->tgt_stop)) {
2753 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2754 "New command while device %p is shutting down\n", tgt);
2755 return -EFAULT;
2756 }
2757
2758 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2759 if (!cmd) {
2760 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2761 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2762 return -ENOMEM;
2763 }
2764
2765 INIT_LIST_HEAD(&cmd->cmd_list);
2766
2767 memcpy(&cmd->atio, atio, sizeof(*atio));
2768 cmd->state = QLA_TGT_STATE_NEW;
2769 cmd->tgt = ha->tgt.qla_tgt;
2770 cmd->vha = vha;
2771
2772 INIT_WORK(&cmd->work, qlt_do_work);
2773 queue_work(qla_tgt_wq, &cmd->work);
2774 return 0;
2775
2776}
2777
2778/* ha->hardware_lock supposed to be held on entry */
2779static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2780 int fn, void *iocb, int flags)
2781{
2782 struct scsi_qla_host *vha = sess->vha;
2783 struct qla_hw_data *ha = vha->hw;
2784 struct qla_tgt_mgmt_cmd *mcmd;
2785 int res;
2786 uint8_t tmr_func;
2787
2788 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2789 if (!mcmd) {
2790 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2791 "qla_target(%d): Allocation of management "
2792 "command failed, some commands and their data could "
2793 "leak\n", vha->vp_idx);
2794 return -ENOMEM;
2795 }
2796 memset(mcmd, 0, sizeof(*mcmd));
2797 mcmd->sess = sess;
2798
2799 if (iocb) {
2800 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2801 sizeof(mcmd->orig_iocb.imm_ntfy));
2802 }
2803 mcmd->tmr_func = fn;
2804 mcmd->flags = flags;
2805
2806 switch (fn) {
2807 case QLA_TGT_CLEAR_ACA:
2808 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2809 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2810 tmr_func = TMR_CLEAR_ACA;
2811 break;
2812
2813 case QLA_TGT_TARGET_RESET:
2814 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2815 "qla_target(%d): TARGET_RESET received\n",
2816 sess->vha->vp_idx);
2817 tmr_func = TMR_TARGET_WARM_RESET;
2818 break;
2819
2820 case QLA_TGT_LUN_RESET:
2821 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2822 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2823 tmr_func = TMR_LUN_RESET;
2824 break;
2825
2826 case QLA_TGT_CLEAR_TS:
2827 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2828 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2829 tmr_func = TMR_CLEAR_TASK_SET;
2830 break;
2831
2832 case QLA_TGT_ABORT_TS:
2833 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2834 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2835 tmr_func = TMR_ABORT_TASK_SET;
2836 break;
2837#if 0
2838 case QLA_TGT_ABORT_ALL:
2839 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2840 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2841 sess->vha->vp_idx);
2842 tmr_func = 0;
2843 break;
2844
2845 case QLA_TGT_ABORT_ALL_SESS:
2846 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2847 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2848 sess->vha->vp_idx);
2849 tmr_func = 0;
2850 break;
2851
2852 case QLA_TGT_NEXUS_LOSS_SESS:
2853 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2854 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2855 sess->vha->vp_idx);
2856 tmr_func = 0;
2857 break;
2858
2859 case QLA_TGT_NEXUS_LOSS:
2860 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2861 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2862 tmr_func = 0;
2863 break;
2864#endif
2865 default:
2866 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2867 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2868 sess->vha->vp_idx, fn);
2869 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2870 return -ENOSYS;
2871 }
2872
2873 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2874 if (res != 0) {
2875 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2876 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2877 sess->vha->vp_idx, res);
2878 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2879 return -EFAULT;
2880 }
2881
2882 return 0;
2883}
2884
2885/* ha->hardware_lock supposed to be held on entry */
2886static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2887{
2888 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2889 struct qla_hw_data *ha = vha->hw;
2890 struct qla_tgt *tgt;
2891 struct qla_tgt_sess *sess;
2892 uint32_t lun, unpacked_lun;
2893 int lun_size, fn;
2894
2895 tgt = ha->tgt.qla_tgt;
2896
2897 lun = a->u.isp24.fcp_cmnd.lun;
2898 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2899 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2900 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2901 a->u.isp24.fcp_hdr.s_id);
2902 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2903
2904 if (!sess) {
2905 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2906 "qla_target(%d): task mgmt fn 0x%x for "
2907 "non-existant session\n", vha->vp_idx, fn);
2908 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2909 sizeof(struct atio_from_isp));
2910 }
2911
2912 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2913}
2914
2915/* ha->hardware_lock supposed to be held on entry */
2916static int __qlt_abort_task(struct scsi_qla_host *vha,
2917 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2918{
2919 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2920 struct qla_hw_data *ha = vha->hw;
2921 struct qla_tgt_mgmt_cmd *mcmd;
2922 uint32_t lun, unpacked_lun;
2923 int rc;
2924
2925 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2926 if (mcmd == NULL) {
2927 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2928 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2929 vha->vp_idx, __func__);
2930 return -ENOMEM;
2931 }
2932 memset(mcmd, 0, sizeof(*mcmd));
2933
2934 mcmd->sess = sess;
2935 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2936 sizeof(mcmd->orig_iocb.imm_ntfy));
2937
2938 lun = a->u.isp24.fcp_cmnd.lun;
2939 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2940
2941 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2942 le16_to_cpu(iocb->u.isp2x.seq_id));
2943 if (rc != 0) {
2944 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2945 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2946 vha->vp_idx, rc);
2947 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2948 return -EFAULT;
2949 }
2950
2951 return 0;
2952}
2953
2954/* ha->hardware_lock supposed to be held on entry */
2955static int qlt_abort_task(struct scsi_qla_host *vha,
2956 struct imm_ntfy_from_isp *iocb)
2957{
2958 struct qla_hw_data *ha = vha->hw;
2959 struct qla_tgt_sess *sess;
2960 int loop_id;
2961
2962 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2963
2964 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2965 if (sess == NULL) {
2966 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2967 "qla_target(%d): task abort for unexisting "
2968 "session\n", vha->vp_idx);
2969 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2970 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2971 }
2972
2973 return __qlt_abort_task(vha, iocb, sess);
2974}
2975
2976/*
2977 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2978 */
2979static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2980 struct imm_ntfy_from_isp *iocb)
2981{
2982 struct qla_hw_data *ha = vha->hw;
2983 int res = 0;
2984
2985 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2986 "qla_target(%d): Port ID: 0x%02x:%02x:%02x"
2987 " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0],
2988 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2],
2989 iocb->u.isp24.status_subcode);
2990
2991 switch (iocb->u.isp24.status_subcode) {
2992 case ELS_PLOGI:
2993 case ELS_FLOGI:
2994 case ELS_PRLI:
2995 case ELS_LOGO:
2996 case ELS_PRLO:
2997 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2998 break;
2999 case ELS_PDISC:
3000 case ELS_ADISC:
3001 {
3002 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3003 if (tgt->link_reinit_iocb_pending) {
3004 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3005 0, 0, 0, 0, 0, 0);
3006 tgt->link_reinit_iocb_pending = 0;
3007 }
3008 res = 1; /* send notify ack */
3009 break;
3010 }
3011
3012 default:
3013 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3014 "qla_target(%d): Unsupported ELS command %x "
3015 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3016 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3017 break;
3018 }
3019
3020 return res;
3021}
3022
3023static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3024{
3025 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3026 size_t first_offset = 0, rem_offset = offset, tmp = 0;
3027 int i, sg_srr_cnt, bufflen = 0;
3028
3029 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3030 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3031 "cmd->sg_cnt: %u, direction: %d\n",
3032 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3033
3034 /*
3035 * FIXME: Reject non zero SRR relative offset until we can test
3036 * this code properly.
3037 */
3038 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3039 return -1;
3040
3041 if (!cmd->sg || !cmd->sg_cnt) {
3042 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3043 "Missing cmd->sg or zero cmd->sg_cnt in"
3044 " qla_tgt_set_data_offset\n");
3045 return -EINVAL;
3046 }
3047 /*
3048 * Walk the current cmd->sg list until we locate the new sg_srr_start
3049 */
3050 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3051 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3052 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3053 i, sg, sg_page(sg), sg->length, sg->offset);
3054
3055 if ((sg->length + tmp) > offset) {
3056 first_offset = rem_offset;
3057 sg_srr_start = sg;
3058 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3059 "Found matching sg[%d], using %p as sg_srr_start, "
3060 "and using first_offset: %zu\n", i, sg,
3061 first_offset);
3062 break;
3063 }
3064 tmp += sg->length;
3065 rem_offset -= sg->length;
3066 }
3067
3068 if (!sg_srr_start) {
3069 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3070 "Unable to locate sg_srr_start for offset: %u\n", offset);
3071 return -EINVAL;
3072 }
3073 sg_srr_cnt = (cmd->sg_cnt - i);
3074
3075 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3076 if (!sg_srr) {
3077 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3078 "Unable to allocate sgp\n");
3079 return -ENOMEM;
3080 }
3081 sg_init_table(sg_srr, sg_srr_cnt);
3082 sgp = &sg_srr[0];
3083 /*
3084 * Walk the remaining list for sg_srr_start, mapping to the newly
3085 * allocated sg_srr taking first_offset into account.
3086 */
3087 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3088 if (first_offset) {
3089 sg_set_page(sgp, sg_page(sg),
3090 (sg->length - first_offset), first_offset);
3091 first_offset = 0;
3092 } else {
3093 sg_set_page(sgp, sg_page(sg), sg->length, 0);
3094 }
3095 bufflen += sgp->length;
3096
3097 sgp = sg_next(sgp);
3098 if (!sgp)
3099 break;
3100 }
3101
3102 cmd->sg = sg_srr;
3103 cmd->sg_cnt = sg_srr_cnt;
3104 cmd->bufflen = bufflen;
3105 cmd->offset += offset;
3106 cmd->free_sg = 1;
3107
3108 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3109 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3110 cmd->sg_cnt);
3111 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3112 cmd->bufflen);
3113 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3114 cmd->offset);
3115
3116 if (cmd->sg_cnt < 0)
3117 BUG();
3118
3119 if (cmd->bufflen < 0)
3120 BUG();
3121
3122 return 0;
3123}
3124
3125static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3126 uint32_t srr_rel_offs, int *xmit_type)
3127{
3128 int res = 0, rel_offs;
3129
3130 rel_offs = srr_rel_offs - cmd->offset;
3131 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3132 srr_rel_offs, rel_offs);
3133
3134 *xmit_type = QLA_TGT_XMIT_ALL;
3135
3136 if (rel_offs < 0) {
3137 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3138 "qla_target(%d): SRR rel_offs (%d) < 0",
3139 cmd->vha->vp_idx, rel_offs);
3140 res = -1;
3141 } else if (rel_offs == cmd->bufflen)
3142 *xmit_type = QLA_TGT_XMIT_STATUS;
3143 else if (rel_offs > 0)
3144 res = qlt_set_data_offset(cmd, rel_offs);
3145
3146 return res;
3147}
3148
3149/* No locks, thread context */
3150static void qlt_handle_srr(struct scsi_qla_host *vha,
3151 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3152{
3153 struct imm_ntfy_from_isp *ntfy =
3154 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3155 struct qla_hw_data *ha = vha->hw;
3156 struct qla_tgt_cmd *cmd = sctio->cmd;
3157 struct se_cmd *se_cmd = &cmd->se_cmd;
3158 unsigned long flags;
3159 int xmit_type = 0, resp = 0;
3160 uint32_t offset;
3161 uint16_t srr_ui;
3162
3163 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3164 srr_ui = ntfy->u.isp24.srr_ui;
3165
3166 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3167 cmd, srr_ui);
3168
3169 switch (srr_ui) {
3170 case SRR_IU_STATUS:
3171 spin_lock_irqsave(&ha->hardware_lock, flags);
3172 qlt_send_notify_ack(vha, ntfy,
3173 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3174 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3175 xmit_type = QLA_TGT_XMIT_STATUS;
3176 resp = 1;
3177 break;
3178 case SRR_IU_DATA_IN:
3179 if (!cmd->sg || !cmd->sg_cnt) {
3180 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3181 "Unable to process SRR_IU_DATA_IN due to"
3182 " missing cmd->sg, state: %d\n", cmd->state);
3183 dump_stack();
3184 goto out_reject;
3185 }
3186 if (se_cmd->scsi_status != 0) {
3187 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3188 "Rejecting SRR_IU_DATA_IN with non GOOD "
3189 "scsi_status\n");
3190 goto out_reject;
3191 }
3192 cmd->bufflen = se_cmd->data_length;
3193
3194 if (qlt_has_data(cmd)) {
3195 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3196 goto out_reject;
3197 spin_lock_irqsave(&ha->hardware_lock, flags);
3198 qlt_send_notify_ack(vha, ntfy,
3199 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3200 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3201 resp = 1;
3202 } else {
3203 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3204 "qla_target(%d): SRR for in data for cmd "
3205 "without them (tag %d, SCSI status %d), "
3206 "reject", vha->vp_idx, cmd->tag,
3207 cmd->se_cmd.scsi_status);
3208 goto out_reject;
3209 }
3210 break;
3211 case SRR_IU_DATA_OUT:
3212 if (!cmd->sg || !cmd->sg_cnt) {
3213 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3214 "Unable to process SRR_IU_DATA_OUT due to"
3215 " missing cmd->sg\n");
3216 dump_stack();
3217 goto out_reject;
3218 }
3219 if (se_cmd->scsi_status != 0) {
3220 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3221 "Rejecting SRR_IU_DATA_OUT"
3222 " with non GOOD scsi_status\n");
3223 goto out_reject;
3224 }
3225 cmd->bufflen = se_cmd->data_length;
3226
3227 if (qlt_has_data(cmd)) {
3228 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3229 goto out_reject;
3230 spin_lock_irqsave(&ha->hardware_lock, flags);
3231 qlt_send_notify_ack(vha, ntfy,
3232 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3233 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3234 if (xmit_type & QLA_TGT_XMIT_DATA)
3235 qlt_rdy_to_xfer(cmd);
3236 } else {
3237 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3238 "qla_target(%d): SRR for out data for cmd "
3239 "without them (tag %d, SCSI status %d), "
3240 "reject", vha->vp_idx, cmd->tag,
3241 cmd->se_cmd.scsi_status);
3242 goto out_reject;
3243 }
3244 break;
3245 default:
3246 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3247 "qla_target(%d): Unknown srr_ui value %x",
3248 vha->vp_idx, srr_ui);
3249 goto out_reject;
3250 }
3251
3252 /* Transmit response in case of status and data-in cases */
3253 if (resp)
3254 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3255
3256 return;
3257
3258out_reject:
3259 spin_lock_irqsave(&ha->hardware_lock, flags);
3260 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3261 NOTIFY_ACK_SRR_FLAGS_REJECT,
3262 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3263 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3264 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3265 cmd->state = QLA_TGT_STATE_DATA_IN;
3266 dump_stack();
3267 } else
3268 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3269 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3270}
3271
3272static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3273 struct qla_tgt_srr_imm *imm, int ha_locked)
3274{
3275 struct qla_hw_data *ha = vha->hw;
3276 unsigned long flags = 0;
3277
3278 if (!ha_locked)
3279 spin_lock_irqsave(&ha->hardware_lock, flags);
3280
3281 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3282 NOTIFY_ACK_SRR_FLAGS_REJECT,
3283 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3284 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3285
3286 if (!ha_locked)
3287 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3288
3289 kfree(imm);
3290}
3291
3292static void qlt_handle_srr_work(struct work_struct *work)
3293{
3294 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3295 struct scsi_qla_host *vha = tgt->vha;
3296 struct qla_tgt_srr_ctio *sctio;
3297 unsigned long flags;
3298
3299 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3300 tgt);
3301
3302restart:
3303 spin_lock_irqsave(&tgt->srr_lock, flags);
3304 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3305 struct qla_tgt_srr_imm *imm, *i, *ti;
3306 struct qla_tgt_cmd *cmd;
3307 struct se_cmd *se_cmd;
3308
3309 imm = NULL;
3310 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3311 srr_list_entry) {
3312 if (i->srr_id == sctio->srr_id) {
3313 list_del(&i->srr_list_entry);
3314 if (imm) {
3315 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3316 "qla_target(%d): There must be "
3317 "only one IMM SRR per CTIO SRR "
3318 "(IMM SRR %p, id %d, CTIO %p\n",
3319 vha->vp_idx, i, i->srr_id, sctio);
3320 qlt_reject_free_srr_imm(tgt->vha, i, 0);
3321 } else
3322 imm = i;
3323 }
3324 }
3325
3326 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3327 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3328 sctio->srr_id);
3329
3330 if (imm == NULL) {
3331 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3332 "Not found matching IMM for SRR CTIO (id %d)\n",
3333 sctio->srr_id);
3334 continue;
3335 } else
3336 list_del(&sctio->srr_list_entry);
3337
3338 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3339
3340 cmd = sctio->cmd;
3341 /*
3342 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3343 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3344 * logic..
3345 */
3346 cmd->offset = 0;
3347 if (cmd->free_sg) {
3348 kfree(cmd->sg);
3349 cmd->sg = NULL;
3350 cmd->free_sg = 0;
3351 }
3352 se_cmd = &cmd->se_cmd;
3353
3354 cmd->sg_cnt = se_cmd->t_data_nents;
3355 cmd->sg = se_cmd->t_data_sg;
3356
3357 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3358 "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3359 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3360 se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3361
3362 qlt_handle_srr(vha, sctio, imm);
3363
3364 kfree(imm);
3365 kfree(sctio);
3366 goto restart;
3367 }
3368 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3369}
3370
3371/* ha->hardware_lock supposed to be held on entry */
3372static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3373 struct imm_ntfy_from_isp *iocb)
3374{
3375 struct qla_tgt_srr_imm *imm;
3376 struct qla_hw_data *ha = vha->hw;
3377 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3378 struct qla_tgt_srr_ctio *sctio;
3379
3380 tgt->imm_srr_id++;
3381
3382 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3383 vha->vp_idx);
3384
3385 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3386 if (imm != NULL) {
3387 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3388
3389 /* IRQ is already OFF */
3390 spin_lock(&tgt->srr_lock);
3391 imm->srr_id = tgt->imm_srr_id;
3392 list_add_tail(&imm->srr_list_entry,
3393 &tgt->srr_imm_list);
3394 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3395 "IMM NTFY SRR %p added (id %d, ui %x)\n",
3396 imm, imm->srr_id, iocb->u.isp24.srr_ui);
3397 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3398 int found = 0;
3399 list_for_each_entry(sctio, &tgt->srr_ctio_list,
3400 srr_list_entry) {
3401 if (sctio->srr_id == imm->srr_id) {
3402 found = 1;
3403 break;
3404 }
3405 }
3406 if (found) {
3407 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3408 "Scheduling srr work\n");
3409 schedule_work(&tgt->srr_work);
3410 } else {
3411 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3412 "qla_target(%d): imm_srr_id "
3413 "== ctio_srr_id (%d), but there is no "
3414 "corresponding SRR CTIO, deleting IMM "
3415 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3416 imm);
3417 list_del(&imm->srr_list_entry);
3418
3419 kfree(imm);
3420
3421 spin_unlock(&tgt->srr_lock);
3422 goto out_reject;
3423 }
3424 }
3425 spin_unlock(&tgt->srr_lock);
3426 } else {
3427 struct qla_tgt_srr_ctio *ts;
3428
3429 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3430 "qla_target(%d): Unable to allocate SRR IMM "
3431 "entry, SRR request will be rejected\n", vha->vp_idx);
3432
3433 /* IRQ is already OFF */
3434 spin_lock(&tgt->srr_lock);
3435 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3436 srr_list_entry) {
3437 if (sctio->srr_id == tgt->imm_srr_id) {
3438 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3439 "CTIO SRR %p deleted (id %d)\n",
3440 sctio, sctio->srr_id);
3441 list_del(&sctio->srr_list_entry);
3442 qlt_send_term_exchange(vha, sctio->cmd,
3443 &sctio->cmd->atio, 1);
3444 kfree(sctio);
3445 }
3446 }
3447 spin_unlock(&tgt->srr_lock);
3448 goto out_reject;
3449 }
3450
3451 return;
3452
3453out_reject:
3454 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3455 NOTIFY_ACK_SRR_FLAGS_REJECT,
3456 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3457 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3458}
3459
3460/*
3461 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3462 */
3463static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3464 struct imm_ntfy_from_isp *iocb)
3465{
3466 struct qla_hw_data *ha = vha->hw;
3467 uint32_t add_flags = 0;
3468 int send_notify_ack = 1;
3469 uint16_t status;
3470
3471 status = le16_to_cpu(iocb->u.isp2x.status);
3472 switch (status) {
3473 case IMM_NTFY_LIP_RESET:
3474 {
3475 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3476 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3477 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3478 iocb->u.isp24.status_subcode);
3479
3480 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3481 send_notify_ack = 0;
3482 break;
3483 }
3484
3485 case IMM_NTFY_LIP_LINK_REINIT:
3486 {
3487 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3488 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3489 "qla_target(%d): LINK REINIT (loop %#x, "
3490 "subcode %x)\n", vha->vp_idx,
3491 le16_to_cpu(iocb->u.isp24.nport_handle),
3492 iocb->u.isp24.status_subcode);
3493 if (tgt->link_reinit_iocb_pending) {
3494 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3495 0, 0, 0, 0, 0, 0);
3496 }
3497 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3498 tgt->link_reinit_iocb_pending = 1;
3499 /*
3500 * QLogic requires to wait after LINK REINIT for possible
3501 * PDISC or ADISC ELS commands
3502 */
3503 send_notify_ack = 0;
3504 break;
3505 }
3506
3507 case IMM_NTFY_PORT_LOGOUT:
3508 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3509 "qla_target(%d): Port logout (loop "
3510 "%#x, subcode %x)\n", vha->vp_idx,
3511 le16_to_cpu(iocb->u.isp24.nport_handle),
3512 iocb->u.isp24.status_subcode);
3513
3514 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3515 send_notify_ack = 0;
3516 /* The sessions will be cleared in the callback, if needed */
3517 break;
3518
3519 case IMM_NTFY_GLBL_TPRLO:
3520 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3521 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3522 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3523 send_notify_ack = 0;
3524 /* The sessions will be cleared in the callback, if needed */
3525 break;
3526
3527 case IMM_NTFY_PORT_CONFIG:
3528 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3529 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3530 status);
3531 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3532 send_notify_ack = 0;
3533 /* The sessions will be cleared in the callback, if needed */
3534 break;
3535
3536 case IMM_NTFY_GLBL_LOGO:
3537 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3538 "qla_target(%d): Link failure detected\n",
3539 vha->vp_idx);
3540 /* I_T nexus loss */
3541 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3542 send_notify_ack = 0;
3543 break;
3544
3545 case IMM_NTFY_IOCB_OVERFLOW:
3546 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3547 "qla_target(%d): Cannot provide requested "
3548 "capability (IOCB overflowed the immediate notify "
3549 "resource count)\n", vha->vp_idx);
3550 break;
3551
3552 case IMM_NTFY_ABORT_TASK:
3553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3554 "qla_target(%d): Abort Task (S %08x I %#x -> "
3555 "L %#x)\n", vha->vp_idx,
3556 le16_to_cpu(iocb->u.isp2x.seq_id),
3557 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3558 le16_to_cpu(iocb->u.isp2x.lun));
3559 if (qlt_abort_task(vha, iocb) == 0)
3560 send_notify_ack = 0;
3561 break;
3562
3563 case IMM_NTFY_RESOURCE:
3564 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3565 "qla_target(%d): Out of resources, host %ld\n",
3566 vha->vp_idx, vha->host_no);
3567 break;
3568
3569 case IMM_NTFY_MSG_RX:
3570 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3571 "qla_target(%d): Immediate notify task %x\n",
3572 vha->vp_idx, iocb->u.isp2x.task_flags);
3573 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3574 send_notify_ack = 0;
3575 break;
3576
3577 case IMM_NTFY_ELS:
3578 if (qlt_24xx_handle_els(vha, iocb) == 0)
3579 send_notify_ack = 0;
3580 break;
3581
3582 case IMM_NTFY_SRR:
3583 qlt_prepare_srr_imm(vha, iocb);
3584 send_notify_ack = 0;
3585 break;
3586
3587 default:
3588 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3589 "qla_target(%d): Received unknown immediate "
3590 "notify status %x\n", vha->vp_idx, status);
3591 break;
3592 }
3593
3594 if (send_notify_ack)
3595 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3596}
3597
3598/*
3599 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3600 * This function sends busy to ISP 2xxx or 24xx.
3601 */
3602static void qlt_send_busy(struct scsi_qla_host *vha,
3603 struct atio_from_isp *atio, uint16_t status)
3604{
3605 struct ctio7_to_24xx *ctio24;
3606 struct qla_hw_data *ha = vha->hw;
3607 request_t *pkt;
3608 struct qla_tgt_sess *sess = NULL;
3609
3610 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3611 atio->u.isp24.fcp_hdr.s_id);
3612 if (!sess) {
3613 qlt_send_term_exchange(vha, NULL, atio, 1);
3614 return;
3615 }
3616 /* Sending marker isn't necessary, since we called from ISR */
3617
3618 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3619 if (!pkt) {
3620 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3621 "qla_target(%d): %s failed: unable to allocate "
3622 "request packet", vha->vp_idx, __func__);
3623 return;
3624 }
3625
3626 pkt->entry_count = 1;
3627 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3628
3629 ctio24 = (struct ctio7_to_24xx *)pkt;
3630 ctio24->entry_type = CTIO_TYPE7;
3631 ctio24->nport_handle = sess->loop_id;
3632 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3633 ctio24->vp_index = vha->vp_idx;
3634 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3635 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3636 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3637 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3638 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3639 __constant_cpu_to_le16(
3640 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3641 CTIO7_FLAGS_DONT_RET_CTIO);
3642 /*
3643 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3644 * if the explicit conformation is used.
3645 */
3646 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3647 ctio24->u.status1.scsi_status = cpu_to_le16(status);
3648 ctio24->u.status1.residual = get_unaligned((uint32_t *)
3649 &atio->u.isp24.fcp_cmnd.add_cdb[
3650 atio->u.isp24.fcp_cmnd.add_cdb_len]);
3651 if (ctio24->u.status1.residual != 0)
3652 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3653
3654 qla2x00_start_iocbs(vha, vha->req);
3655}
3656
3657/* ha->hardware_lock supposed to be held on entry */
3658/* called via callback from qla2xxx */
3659static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3660 struct atio_from_isp *atio)
3661{
3662 struct qla_hw_data *ha = vha->hw;
3663 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3664 int rc;
3665
3666 if (unlikely(tgt == NULL)) {
3667 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3668 "ATIO pkt, but no tgt (ha %p)", ha);
3669 return;
3670 }
3671 ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3672 "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3673 vha->vp_idx, atio, atio->u.raw.entry_type,
3674 atio->u.raw.entry_count);
3675 /*
3676 * In tgt_stop mode we also should allow all requests to pass.
3677 * Otherwise, some commands can stuck.
3678 */
3679
3680 tgt->irq_cmd_count++;
3681
3682 switch (atio->u.raw.entry_type) {
3683 case ATIO_TYPE7:
3684 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3685 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3686 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3687 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3688 atio->u.isp24.fcp_cmnd.rddata,
3689 atio->u.isp24.fcp_cmnd.wrdata,
3690 atio->u.isp24.fcp_cmnd.add_cdb_len,
3691 be32_to_cpu(get_unaligned((uint32_t *)
3692 &atio->u.isp24.fcp_cmnd.add_cdb[
3693 atio->u.isp24.fcp_cmnd.add_cdb_len])),
3694 atio->u.isp24.fcp_hdr.s_id[0],
3695 atio->u.isp24.fcp_hdr.s_id[1],
3696 atio->u.isp24.fcp_hdr.s_id[2]);
3697
3698 if (unlikely(atio->u.isp24.exchange_addr ==
3699 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3700 ql_dbg(ql_dbg_tgt, vha, 0xe058,
3701 "qla_target(%d): ATIO_TYPE7 "
3702 "received with UNKNOWN exchange address, "
3703 "sending QUEUE_FULL\n", vha->vp_idx);
3704 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3705 break;
3706 }
3707 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3708 rc = qlt_handle_cmd_for_atio(vha, atio);
3709 else
3710 rc = qlt_handle_task_mgmt(vha, atio);
3711 if (unlikely(rc != 0)) {
3712 if (rc == -ESRCH) {
3713#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3714 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3715#else
3716 qlt_send_term_exchange(vha, NULL, atio, 1);
3717#endif
3718 } else {
3719 if (tgt->tgt_stop) {
3720 ql_dbg(ql_dbg_tgt, vha, 0xe059,
3721 "qla_target: Unable to send "
3722 "command to target for req, "
3723 "ignoring.\n");
3724 } else {
3725 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3726 "qla_target(%d): Unable to send "
3727 "command to target, sending BUSY "
3728 "status.\n", vha->vp_idx);
3729 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3730 }
3731 }
3732 }
3733 break;
3734
3735 case IMMED_NOTIFY_TYPE:
3736 {
3737 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3738 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3739 "qla_target(%d): Received ATIO packet %x "
3740 "with error status %x\n", vha->vp_idx,
3741 atio->u.raw.entry_type,
3742 atio->u.isp2x.entry_status);
3743 break;
3744 }
3745 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3746 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3747 break;
3748 }
3749
3750 default:
3751 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3752 "qla_target(%d): Received unknown ATIO atio "
3753 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3754 break;
3755 }
3756
3757 tgt->irq_cmd_count--;
3758}
3759
3760/* ha->hardware_lock supposed to be held on entry */
3761/* called via callback from qla2xxx */
3762static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3763{
3764 struct qla_hw_data *ha = vha->hw;
3765 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3766
3767 if (unlikely(tgt == NULL)) {
3768 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3769 "qla_target(%d): Response pkt %x received, but no "
3770 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3771 return;
3772 }
3773
3774 ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3775 "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3776 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3777 pkt->entry_count, pkt->entry_status, pkt->handle);
3778
3779 /*
3780 * In tgt_stop mode we also should allow all requests to pass.
3781 * Otherwise, some commands can stuck.
3782 */
3783
3784 tgt->irq_cmd_count++;
3785
3786 switch (pkt->entry_type) {
3787 case CTIO_TYPE7:
3788 {
3789 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3790 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3791 vha->vp_idx);
3792 qlt_do_ctio_completion(vha, entry->handle,
3793 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3794 entry);
3795 break;
3796 }
3797
3798 case ACCEPT_TGT_IO_TYPE:
3799 {
3800 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3801 int rc;
3802 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3803 "ACCEPT_TGT_IO instance %d status %04x "
3804 "lun %04x read/write %d data_length %04x "
3805 "target_id %02x rx_id %04x\n ", vha->vp_idx,
3806 le16_to_cpu(atio->u.isp2x.status),
3807 le16_to_cpu(atio->u.isp2x.lun),
3808 atio->u.isp2x.execution_codes,
3809 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3810 atio), atio->u.isp2x.rx_id);
3811 if (atio->u.isp2x.status !=
3812 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3813 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3814 "qla_target(%d): ATIO with error "
3815 "status %x received\n", vha->vp_idx,
3816 le16_to_cpu(atio->u.isp2x.status));
3817 break;
3818 }
3819 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3820 "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3821 atio->u.isp2x.cdb[0], (unsigned long
3822 int)sizeof(atio->u.isp2x.cdb));
3823
3824 rc = qlt_handle_cmd_for_atio(vha, atio);
3825 if (unlikely(rc != 0)) {
3826 if (rc == -ESRCH) {
3827#if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3828 qlt_send_busy(vha, atio, 0);
3829#else
3830 qlt_send_term_exchange(vha, NULL, atio, 1);
3831#endif
3832 } else {
3833 if (tgt->tgt_stop) {
3834 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3835 "qla_target: Unable to send "
3836 "command to target, sending TERM "
3837 "EXCHANGE for rsp\n");
3838 qlt_send_term_exchange(vha, NULL,
3839 atio, 1);
3840 } else {
3841 ql_dbg(ql_dbg_tgt, vha, 0xe060,
3842 "qla_target(%d): Unable to send "
3843 "command to target, sending BUSY "
3844 "status\n", vha->vp_idx);
3845 qlt_send_busy(vha, atio, 0);
3846 }
3847 }
3848 }
3849 }
3850 break;
3851
3852 case CONTINUE_TGT_IO_TYPE:
3853 {
3854 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3855 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3856 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3857 qlt_do_ctio_completion(vha, entry->handle,
3858 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3859 entry);
3860 break;
3861 }
3862
3863 case CTIO_A64_TYPE:
3864 {
3865 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3866 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3867 vha->vp_idx);
3868 qlt_do_ctio_completion(vha, entry->handle,
3869 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3870 entry);
3871 break;
3872 }
3873
3874 case IMMED_NOTIFY_TYPE:
3875 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3876 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3877 break;
3878
3879 case NOTIFY_ACK_TYPE:
3880 if (tgt->notify_ack_expected > 0) {
3881 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3882 ql_dbg(ql_dbg_tgt, vha, 0xe036,
3883 "NOTIFY_ACK seq %08x status %x\n",
3884 le16_to_cpu(entry->u.isp2x.seq_id),
3885 le16_to_cpu(entry->u.isp2x.status));
3886 tgt->notify_ack_expected--;
3887 if (entry->u.isp2x.status !=
3888 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3889 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3890 "qla_target(%d): NOTIFY_ACK "
3891 "failed %x\n", vha->vp_idx,
3892 le16_to_cpu(entry->u.isp2x.status));
3893 }
3894 } else {
3895 ql_dbg(ql_dbg_tgt, vha, 0xe062,
3896 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3897 vha->vp_idx);
3898 }
3899 break;
3900
3901 case ABTS_RECV_24XX:
3902 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3903 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3904 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3905 break;
3906
3907 case ABTS_RESP_24XX:
3908 if (tgt->abts_resp_expected > 0) {
3909 struct abts_resp_from_24xx_fw *entry =
3910 (struct abts_resp_from_24xx_fw *)pkt;
3911 ql_dbg(ql_dbg_tgt, vha, 0xe038,
3912 "ABTS_RESP_24XX: compl_status %x\n",
3913 entry->compl_status);
3914 tgt->abts_resp_expected--;
3915 if (le16_to_cpu(entry->compl_status) !=
3916 ABTS_RESP_COMPL_SUCCESS) {
3917 if ((entry->error_subcode1 == 0x1E) &&
3918 (entry->error_subcode2 == 0)) {
3919 /*
3920 * We've got a race here: aborted
3921 * exchange not terminated, i.e.
3922 * response for the aborted command was
3923 * sent between the abort request was
3924 * received and processed.
3925 * Unfortunately, the firmware has a
3926 * silly requirement that all aborted
3927 * exchanges must be explicitely
3928 * terminated, otherwise it refuses to
3929 * send responses for the abort
3930 * requests. So, we have to
3931 * (re)terminate the exchange and retry
3932 * the abort response.
3933 */
3934 qlt_24xx_retry_term_exchange(vha,
3935 entry);
3936 } else
3937 ql_dbg(ql_dbg_tgt, vha, 0xe063,
3938 "qla_target(%d): ABTS_RESP_24XX "
3939 "failed %x (subcode %x:%x)",
3940 vha->vp_idx, entry->compl_status,
3941 entry->error_subcode1,
3942 entry->error_subcode2);
3943 }
3944 } else {
3945 ql_dbg(ql_dbg_tgt, vha, 0xe064,
3946 "qla_target(%d): Unexpected ABTS_RESP_24XX "
3947 "received\n", vha->vp_idx);
3948 }
3949 break;
3950
3951 default:
3952 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3953 "qla_target(%d): Received unknown response pkt "
3954 "type %x\n", vha->vp_idx, pkt->entry_type);
3955 break;
3956 }
3957
3958 tgt->irq_cmd_count--;
3959}
3960
3961/*
3962 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3963 */
3964void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3965 uint16_t *mailbox)
3966{
3967 struct qla_hw_data *ha = vha->hw;
3968 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4f1d0f19 3969 int login_code;
2d70c103
NB		 3970
3971 ql_dbg(ql_dbg_tgt, vha, 0xe039,
3972 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3973 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3974 ha->operating_mode, ha->current_topology);
3975
3976 if (!ha->tgt.tgt_ops)
3977 return;
3978
3979 if (unlikely(tgt == NULL)) {
3980 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3981 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3982 return;
3983 }
3984
3985 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3986 IS_QLA2100(ha))
3987 return;
3988 /*
3989 * In tgt_stop mode we also should allow all requests to pass.
3990 * Otherwise, some commands can stuck.
3991 */
3992
3993 tgt->irq_cmd_count++;
3994
3995 switch (code) {
3996 case MBA_RESET: /* Reset */
3997 case MBA_SYSTEM_ERR: /* System Error */
3998 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
3999 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
4000 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4001 "qla_target(%d): System error async event %#x "
6efb3c0a 4002 "occurred", vha->vp_idx, code);
2d70c103
NB		 4003 break;
4004 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
4005 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4006 break;
4007
4008 case MBA_LOOP_UP:
4009 {
4010 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6efb3c0a 4011 "qla_target(%d): Async LOOP_UP occurred "
4f1d0f19
AC		 4012 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4013 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4014 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 4015 if (tgt->link_reinit_iocb_pending) {
4016 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4017 0, 0, 0, 0, 0, 0);
4018 tgt->link_reinit_iocb_pending = 0;
4019 }
4020 break;
4021 }
4022
4023 case MBA_LIP_OCCURRED:
4024 case MBA_LOOP_DOWN:
4025 case MBA_LIP_RESET:
4026 case MBA_RSCN_UPDATE:
4027 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6efb3c0a 4028 "qla_target(%d): Async event %#x occurred "
4f1d0f19
AC		 4029 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4030 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4031 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 4032 break;
4033
4034 case MBA_PORT_UPDATE:
4035 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4036 "qla_target(%d): Port update async event %#x "
6efb3c0a 4037 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4f1d0f19
AC		 4038 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4039 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4040 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4041
4042 login_code = le16_to_cpu(mailbox[2]);
4043 if (login_code == 0x4)
2d70c103
NB		 4044 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4045 "Async MB 2: Got PLOGI Complete\n");
4f1d0f19 4046 else if (login_code == 0x7)
2d70c103
NB		 4047 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4048 "Async MB 2: Port Logged Out\n");
4049 break;
4050
4051 default:
4052 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
6efb3c0a 4053 "qla_target(%d): Async event %#x occurred: "
4f1d0f19
AC		 4054 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4055 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4056 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
2d70c103
NB		 4057 break;
4058 }
4059
4060 tgt->irq_cmd_count--;
4061}
4062
4063static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4064 uint16_t loop_id)
4065{
4066 fc_port_t *fcport;
4067 int rc;
4068
4069 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4070 if (!fcport) {
4071 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4072 "qla_target(%d): Allocation of tmp FC port failed",
4073 vha->vp_idx);
4074 return NULL;
4075 }
4076
4077 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4078
4079 fcport->loop_id = loop_id;
4080
4081 rc = qla2x00_get_port_database(vha, fcport, 0);
4082 if (rc != QLA_SUCCESS) {
4083 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4084 "qla_target(%d): Failed to retrieve fcport "
4085 "information -- get_port_database() returned %x "
4086 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4087 kfree(fcport);
4088 return NULL;
4089 }
4090
4091 return fcport;
4092}
4093
4094/* Must be called under tgt_mutex */
4095static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4096 uint8_t *s_id)
4097{
4098 struct qla_hw_data *ha = vha->hw;
4099 struct qla_tgt_sess *sess = NULL;
4100 fc_port_t *fcport = NULL;
4101 int rc, global_resets;
4102 uint16_t loop_id = 0;
4103
4104retry:
4105 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
4106
4107 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4108 if (rc != 0) {
4109 if ((s_id[0] == 0xFF) &&
4110 (s_id[1] == 0xFC)) {
4111 /*
4112 * This is Domain Controller, so it should be
4113 * OK to drop SCSI commands from it.
4114 */
4115 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4116 "Unable to find initiator with S_ID %x:%x:%x",
4117 s_id[0], s_id[1], s_id[2]);
4118 } else
4119 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4120 "qla_target(%d): Unable to find "
4121 "initiator with S_ID %x:%x:%x",
4122 vha->vp_idx, s_id[0], s_id[1],
4123 s_id[2]);
4124 return NULL;
4125 }
4126
4127 fcport = qlt_get_port_database(vha, loop_id);
4128 if (!fcport)
4129 return NULL;
4130
4131 if (global_resets !=
4132 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
4133 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4134 "qla_target(%d): global reset during session discovery "
4135 "(counter was %d, new %d), retrying", vha->vp_idx,
4136 global_resets,
4137 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
4138 goto retry;
4139 }
4140
4141 sess = qlt_create_sess(vha, fcport, true);
4142
4143 kfree(fcport);
4144 return sess;
4145}
4146
4147static void qlt_abort_work(struct qla_tgt *tgt,
4148 struct qla_tgt_sess_work_param *prm)
4149{
4150 struct scsi_qla_host *vha = tgt->vha;
4151 struct qla_hw_data *ha = vha->hw;
4152 struct qla_tgt_sess *sess = NULL;
4153 unsigned long flags;
4154 uint32_t be_s_id;
4155 uint8_t s_id[3];
4156 int rc;
4157
4158 spin_lock_irqsave(&ha->hardware_lock, flags);
4159
4160 if (tgt->tgt_stop)
4161 goto out_term;
4162
4163 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4164 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4165 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4166
4167 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4168 (unsigned char *)&be_s_id);
4169 if (!sess) {
4170 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4171
4172 mutex_lock(&ha->tgt.tgt_mutex);
4173 sess = qlt_make_local_sess(vha, s_id);
4174 /* sess has got an extra creation ref */
4175 mutex_unlock(&ha->tgt.tgt_mutex);
4176
4177 spin_lock_irqsave(&ha->hardware_lock, flags);
4178 if (!sess)
4179 goto out_term;
4180 } else {
4181 kref_get(&sess->se_sess->sess_kref);
4182 }
4183
4184 if (tgt->tgt_stop)
4185 goto out_term;
4186
4187 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4188 if (rc != 0)
4189 goto out_term;
4190 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4191
4192 ha->tgt.tgt_ops->put_sess(sess);
4193 return;
4194
4195out_term:
4196 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4197 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4198 if (sess)
4199 ha->tgt.tgt_ops->put_sess(sess);
4200}
4201
4202static void qlt_tmr_work(struct qla_tgt *tgt,
4203 struct qla_tgt_sess_work_param *prm)
4204{
4205 struct atio_from_isp *a = &prm->tm_iocb2;
4206 struct scsi_qla_host *vha = tgt->vha;
4207 struct qla_hw_data *ha = vha->hw;
4208 struct qla_tgt_sess *sess = NULL;
4209 unsigned long flags;
4210 uint8_t *s_id = NULL; /* to hide compiler warnings */
4211 int rc;
4212 uint32_t lun, unpacked_lun;
4213 int lun_size, fn;
4214 void *iocb;
4215
4216 spin_lock_irqsave(&ha->hardware_lock, flags);
4217
4218 if (tgt->tgt_stop)
4219 goto out_term;
4220
4221 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4222 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4223 if (!sess) {
4224 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4225
4226 mutex_lock(&ha->tgt.tgt_mutex);
4227 sess = qlt_make_local_sess(vha, s_id);
4228 /* sess has got an extra creation ref */
4229 mutex_unlock(&ha->tgt.tgt_mutex);
4230
4231 spin_lock_irqsave(&ha->hardware_lock, flags);
4232 if (!sess)
4233 goto out_term;
4234 } else {
4235 kref_get(&sess->se_sess->sess_kref);
4236 }
4237
4238 iocb = a;
4239 lun = a->u.isp24.fcp_cmnd.lun;
4240 lun_size = sizeof(lun);
4241 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4242 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4243
4244 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4245 if (rc != 0)
4246 goto out_term;
4247 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4248
4249 ha->tgt.tgt_ops->put_sess(sess);
4250 return;
4251
4252out_term:
4253 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4254 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4255 if (sess)
4256 ha->tgt.tgt_ops->put_sess(sess);
4257}
4258
4259static void qlt_sess_work_fn(struct work_struct *work)
4260{
4261 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4262 struct scsi_qla_host *vha = tgt->vha;
4263 unsigned long flags;
4264
4265 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4266
4267 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4268 while (!list_empty(&tgt->sess_works_list)) {
4269 struct qla_tgt_sess_work_param *prm = list_entry(
4270 tgt->sess_works_list.next, typeof(*prm),
4271 sess_works_list_entry);
4272
4273 /*
4274 * This work can be scheduled on several CPUs at time, so we
4275 * must delete the entry to eliminate double processing
4276 */
4277 list_del(&prm->sess_works_list_entry);
4278
4279 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4280
4281 switch (prm->type) {
4282 case QLA_TGT_SESS_WORK_ABORT:
4283 qlt_abort_work(tgt, prm);
4284 break;
4285 case QLA_TGT_SESS_WORK_TM:
4286 qlt_tmr_work(tgt, prm);
4287 break;
4288 default:
4289 BUG_ON(1);
4290 break;
4291 }
4292
4293 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4294
4295 kfree(prm);
4296 }
4297 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4298}
4299
4300/* Must be called under tgt_host_action_mutex */
4301int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4302{
4303 struct qla_tgt *tgt;
4304
4305 if (!QLA_TGT_MODE_ENABLED())
4306 return 0;
4307
4308 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4309 "Registering target for host %ld(%p)", base_vha->host_no, ha);
4310
4311 BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4312
4313 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4314 if (!tgt) {
4315 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4316 "Unable to allocate struct qla_tgt\n");
4317 return -ENOMEM;
4318 }
4319
4320 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4321 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4322
4323 tgt->ha = ha;
4324 tgt->vha = base_vha;
4325 init_waitqueue_head(&tgt->waitQ);
4326 INIT_LIST_HEAD(&tgt->sess_list);
4327 INIT_LIST_HEAD(&tgt->del_sess_list);
4328 INIT_DELAYED_WORK(&tgt->sess_del_work,
4329 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4330 spin_lock_init(&tgt->sess_work_lock);
4331 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4332 INIT_LIST_HEAD(&tgt->sess_works_list);
4333 spin_lock_init(&tgt->srr_lock);
4334 INIT_LIST_HEAD(&tgt->srr_ctio_list);
4335 INIT_LIST_HEAD(&tgt->srr_imm_list);
4336 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4337 atomic_set(&tgt->tgt_global_resets_count, 0);
4338
4339 ha->tgt.qla_tgt = tgt;
4340
4341 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4342 "qla_target(%d): using 64 Bit PCI addressing",
4343 base_vha->vp_idx);
4344 tgt->tgt_enable_64bit_addr = 1;
4345 /* 3 is reserved */
4346 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4347 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4348 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4349
4350 mutex_lock(&qla_tgt_mutex);
4351 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4352 mutex_unlock(&qla_tgt_mutex);
4353
4354 return 0;
4355}
4356
4357/* Must be called under tgt_host_action_mutex */
4358int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4359{
4360 if (!ha->tgt.qla_tgt)
4361 return 0;
4362
4363 mutex_lock(&qla_tgt_mutex);
4364 list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4365 mutex_unlock(&qla_tgt_mutex);
4366
4367 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4368 vha->host_no, ha);
4369 qlt_release(ha->tgt.qla_tgt);
4370
4371 return 0;
4372}
4373
4374static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4375 unsigned char *b)
4376{
4377 int i;
4378
4379 pr_debug("qla2xxx HW vha->node_name: ");
4380 for (i = 0; i < WWN_SIZE; i++)
4381 pr_debug("%02x ", vha->node_name[i]);
4382 pr_debug("\n");
4383 pr_debug("qla2xxx HW vha->port_name: ");
4384 for (i = 0; i < WWN_SIZE; i++)
4385 pr_debug("%02x ", vha->port_name[i]);
4386 pr_debug("\n");
4387
4388 pr_debug("qla2xxx passed configfs WWPN: ");
4389 put_unaligned_be64(wwpn, b);
4390 for (i = 0; i < WWN_SIZE; i++)
4391 pr_debug("%02x ", b[i]);
4392 pr_debug("\n");
4393}
4394
4395/**
4396 * qla_tgt_lport_register - register lport with external module
4397 *
4398 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4399 * @wwpn: Passwd FC target WWPN
4400 * @callback: lport initialization callback for tcm_qla2xxx code
4401 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4402 */
4403int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4404 int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4405{
4406 struct qla_tgt *tgt;
4407 struct scsi_qla_host *vha;
4408 struct qla_hw_data *ha;
4409 struct Scsi_Host *host;
4410 unsigned long flags;
4411 int rc;
4412 u8 b[WWN_SIZE];
4413
4414 mutex_lock(&qla_tgt_mutex);
4415 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4416 vha = tgt->vha;
4417 ha = vha->hw;
4418
4419 host = vha->host;
4420 if (!host)
4421 continue;
4422
4423 if (ha->tgt.tgt_ops != NULL)
4424 continue;
4425
4426 if (!(host->hostt->supported_mode & MODE_TARGET))
4427 continue;
4428
4429 spin_lock_irqsave(&ha->hardware_lock, flags);
4430 if (host->active_mode & MODE_TARGET) {
4431 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4432 host->host_no);
4433 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4434 continue;
4435 }
4436 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4437
4438 if (!scsi_host_get(host)) {
4439 ql_dbg(ql_dbg_tgt, vha, 0xe068,
4440 "Unable to scsi_host_get() for"
4441 " qla2xxx scsi_host\n");
4442 continue;
4443 }
4444 qlt_lport_dump(vha, wwpn, b);
4445
4446 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4447 scsi_host_put(host);
4448 continue;
4449 }
4450 /*
4451 * Setup passed parameters ahead of invoking callback
4452 */
4453 ha->tgt.tgt_ops = qla_tgt_ops;
4454 ha->tgt.target_lport_ptr = target_lport_ptr;
4455 rc = (*callback)(vha);
4456 if (rc != 0) {
4457 ha->tgt.tgt_ops = NULL;
4458 ha->tgt.target_lport_ptr = NULL;
4459 }
4460 mutex_unlock(&qla_tgt_mutex);
4461 return rc;
4462 }
4463 mutex_unlock(&qla_tgt_mutex);
4464
4465 return -ENODEV;
4466}
4467EXPORT_SYMBOL(qlt_lport_register);
4468
4469/**
4470 * qla_tgt_lport_deregister - Degister lport
4471 *
4472 * @vha: Registered scsi_qla_host pointer
4473 */
4474void qlt_lport_deregister(struct scsi_qla_host *vha)
4475{
4476 struct qla_hw_data *ha = vha->hw;
4477 struct Scsi_Host *sh = vha->host;
4478 /*
4479 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4480 */
4481 ha->tgt.target_lport_ptr = NULL;
4482 ha->tgt.tgt_ops = NULL;
4483 /*
4484 * Release the Scsi_Host reference for the underlying qla2xxx host
4485 */
4486 scsi_host_put(sh);
4487}
4488EXPORT_SYMBOL(qlt_lport_deregister);
4489
4490/* Must be called under HW lock */
4491void qlt_set_mode(struct scsi_qla_host *vha)
4492{
4493 struct qla_hw_data *ha = vha->hw;
4494
4495 switch (ql2x_ini_mode) {
4496 case QLA2XXX_INI_MODE_DISABLED:
4497 case QLA2XXX_INI_MODE_EXCLUSIVE:
4498 vha->host->active_mode = MODE_TARGET;
4499 break;
4500 case QLA2XXX_INI_MODE_ENABLED:
4501 vha->host->active_mode |= MODE_TARGET;
4502 break;
4503 default:
4504 break;
4505 }
4506
4507 if (ha->tgt.ini_mode_force_reverse)
4508 qla_reverse_ini_mode(vha);
4509}
4510
4511/* Must be called under HW lock */
4512void qlt_clear_mode(struct scsi_qla_host *vha)
4513{
4514 struct qla_hw_data *ha = vha->hw;
4515
4516 switch (ql2x_ini_mode) {
4517 case QLA2XXX_INI_MODE_DISABLED:
4518 vha->host->active_mode = MODE_UNKNOWN;
4519 break;
4520 case QLA2XXX_INI_MODE_EXCLUSIVE:
4521 vha->host->active_mode = MODE_INITIATOR;
4522 break;
4523 case QLA2XXX_INI_MODE_ENABLED:
4524 vha->host->active_mode &= ~MODE_TARGET;
4525 break;
4526 default:
4527 break;
4528 }
4529
4530 if (ha->tgt.ini_mode_force_reverse)
4531 qla_reverse_ini_mode(vha);
4532}
4533
4534/*
4535 * qla_tgt_enable_vha - NO LOCK HELD
4536 *
4537 * host_reset, bring up w/ Target Mode Enabled
4538 */
4539void
4540qlt_enable_vha(struct scsi_qla_host *vha)
4541{
4542 struct qla_hw_data *ha = vha->hw;
4543 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4544 unsigned long flags;
4545
4546 if (!tgt) {
4547 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4548 "Unable to locate qla_tgt pointer from"
4549 " struct qla_hw_data\n");
4550 dump_stack();
4551 return;
4552 }
4553
4554 spin_lock_irqsave(&ha->hardware_lock, flags);
4555 tgt->tgt_stopped = 0;
4556 qlt_set_mode(vha);
4557 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4558
4559 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4560 qla2xxx_wake_dpc(vha);
4561 qla2x00_wait_for_hba_online(vha);
4562}
4563EXPORT_SYMBOL(qlt_enable_vha);
4564
4565/*
4566 * qla_tgt_disable_vha - NO LOCK HELD
4567 *
4568 * Disable Target Mode and reset the adapter
4569 */
4570void
4571qlt_disable_vha(struct scsi_qla_host *vha)
4572{
4573 struct qla_hw_data *ha = vha->hw;
4574 struct qla_tgt *tgt = ha->tgt.qla_tgt;
4575 unsigned long flags;
4576
4577 if (!tgt) {
4578 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4579 "Unable to locate qla_tgt pointer from"
4580 " struct qla_hw_data\n");
4581 dump_stack();
4582 return;
4583 }
4584
4585 spin_lock_irqsave(&ha->hardware_lock, flags);
4586 qlt_clear_mode(vha);
4587 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4588
4589 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4590 qla2xxx_wake_dpc(vha);
4591 qla2x00_wait_for_hba_online(vha);
4592}
4593
4594/*
4595 * Called from qla_init.c:qla24xx_vport_create() contex to setup
4596 * the target mode specific struct scsi_qla_host and struct qla_hw_data
4597 * members.
4598 */
4599void
4600qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4601{
4602 if (!qla_tgt_mode_enabled(vha))
4603 return;
4604
4605 mutex_init(&ha->tgt.tgt_mutex);
4606 mutex_init(&ha->tgt.tgt_host_action_mutex);
4607
4608 qlt_clear_mode(vha);
4609
4610 /*
4611 * NOTE: Currently the value is kept the same for <24xx and
4612 * >=24xx ISPs. If it is necessary to change it,
4613 * the check should be added for specific ISPs,
4614 * assigning the value appropriately.
4615 */
4616 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4617}
4618
4619void
4620qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4621{
4622 /*
4623 * FC-4 Feature bit 0 indicates target functionality to the name server.
4624 */
4625 if (qla_tgt_mode_enabled(vha)) {
4626 if (qla_ini_mode_enabled(vha))
4627 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4628 else
4629 ct_req->req.rff_id.fc4_feature = BIT_0;
4630 } else if (qla_ini_mode_enabled(vha)) {
4631 ct_req->req.rff_id.fc4_feature = BIT_1;
4632 }
4633}
4634
4635/*
4636 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4637 * @ha: HA context
4638 *
4639 * Beginning of ATIO ring has initialization control block already built
4640 * by nvram config routine.
4641 *
4642 * Returns 0 on success.
4643 */
4644void
4645qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4646{
4647 struct qla_hw_data *ha = vha->hw;
4648 uint16_t cnt;
4649 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4650
4651 if (!qla_tgt_mode_enabled(vha))
4652 return;
4653
4654 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4655 pkt->u.raw.signature = ATIO_PROCESSED;
4656 pkt++;
4657 }
4658
4659}
4660
4661/*
4662 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4663 * @ha: SCSI driver HA context
4664 */
4665void
4666qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4667{
4668 struct qla_hw_data *ha = vha->hw;
4669 struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
4670 struct atio_from_isp *pkt;
4671 int cnt, i;
4672
4673 if (!vha->flags.online)
4674 return;
4675
4676 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4677 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4678 cnt = pkt->u.raw.entry_count;
4679
4680 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4681
4682 for (i = 0; i < cnt; i++) {
4683 ha->tgt.atio_ring_index++;
4684 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4685 ha->tgt.atio_ring_index = 0;
4686 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4687 } else
4688 ha->tgt.atio_ring_ptr++;
4689
4690 pkt->u.raw.signature = ATIO_PROCESSED;
4691 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4692 }
4693 wmb();
4694 }
4695
4696 /* Adjust ring index */
4697 WRT_REG_DWORD(&reg->atio_q_out, ha->tgt.atio_ring_index);
4698}
4699
4700void
4701qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg)
4702{
4703 struct qla_hw_data *ha = vha->hw;
4704
4705/* FIXME: atio_q in/out for ha->mqenable=1..? */
4706 if (ha->mqenable) {
4707#if 0
4708 WRT_REG_DWORD(&reg->isp25mq.atio_q_in, 0);
4709 WRT_REG_DWORD(&reg->isp25mq.atio_q_out, 0);
4710 RD_REG_DWORD(&reg->isp25mq.atio_q_out);
4711#endif
4712 } else {
4713 /* Setup APTIO registers for target mode */
4714 WRT_REG_DWORD(&reg->isp24.atio_q_in, 0);
4715 WRT_REG_DWORD(&reg->isp24.atio_q_out, 0);
4716 RD_REG_DWORD(&reg->isp24.atio_q_out);
4717 }
4718}
4719
4720void
4721qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4722{
4723 struct qla_hw_data *ha = vha->hw;
4724
4725 if (qla_tgt_mode_enabled(vha)) {
4726 if (!ha->tgt.saved_set) {
4727 /* We save only once */
4728 ha->tgt.saved_exchange_count = nv->exchange_count;
4729 ha->tgt.saved_firmware_options_1 =
4730 nv->firmware_options_1;
4731 ha->tgt.saved_firmware_options_2 =
4732 nv->firmware_options_2;
4733 ha->tgt.saved_firmware_options_3 =
4734 nv->firmware_options_3;
4735 ha->tgt.saved_set = 1;
4736 }
4737
4738 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4739
4740 /* Enable target mode */
4741 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4742
4743 /* Disable ini mode, if requested */
4744 if (!qla_ini_mode_enabled(vha))
4745 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4746
4747 /* Disable Full Login after LIP */
4748 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4749 /* Enable initial LIP */
4750 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4751 /* Enable FC tapes support */
4752 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4753 /* Disable Full Login after LIP */
4754 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4755 /* Enable target PRLI control */
4756 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4757 } else {
4758 if (ha->tgt.saved_set) {
4759 nv->exchange_count = ha->tgt.saved_exchange_count;
4760 nv->firmware_options_1 =
4761 ha->tgt.saved_firmware_options_1;
4762 nv->firmware_options_2 =
4763 ha->tgt.saved_firmware_options_2;
4764 nv->firmware_options_3 =
4765 ha->tgt.saved_firmware_options_3;
4766 }
4767 return;
4768 }
4769
4770 /* out-of-order frames reassembly */
4771 nv->firmware_options_3 |= BIT_6|BIT_9;
4772
4773 if (ha->tgt.enable_class_2) {
4774 if (vha->flags.init_done)
4775 fc_host_supported_classes(vha->host) =
4776 FC_COS_CLASS2 | FC_COS_CLASS3;
4777
4778 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4779 } else {
4780 if (vha->flags.init_done)
4781 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4782
4783 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4784 }
4785}
4786
4787void
4788qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4789 struct init_cb_24xx *icb)
4790{
4791 struct qla_hw_data *ha = vha->hw;
4792
4793 if (ha->tgt.node_name_set) {
4794 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4795 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4796 }
4797}
4798
4799int
4800qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4801 struct sts_entry_24xx *pkt)
4802{
4803 switch (pkt->entry_type) {
4804 case ABTS_RECV_24XX:
4805 case ABTS_RESP_24XX:
4806 case CTIO_TYPE7:
4807 case NOTIFY_ACK_TYPE:
4808 return 1;
4809 default:
4810 return 0;
4811 }
4812}
4813
4814void
4815qlt_modify_vp_config(struct scsi_qla_host *vha,
4816 struct vp_config_entry_24xx *vpmod)
4817{
4818 if (qla_tgt_mode_enabled(vha))
4819 vpmod->options_idx1 &= ~BIT_5;
4820 /* Disable ini mode, if requested */
4821 if (!qla_ini_mode_enabled(vha))
4822 vpmod->options_idx1 &= ~BIT_4;
4823}
4824
4825void
4826qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4827{
4828 if (!QLA_TGT_MODE_ENABLED())
4829 return;
4830
4831 mutex_init(&ha->tgt.tgt_mutex);
4832 mutex_init(&ha->tgt.tgt_host_action_mutex);
4833 qlt_clear_mode(base_vha);
4834}
4835
4836int
4837qlt_mem_alloc(struct qla_hw_data *ha)
4838{
4839 if (!QLA_TGT_MODE_ENABLED())
4840 return 0;
4841
4842 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4843 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4844 if (!ha->tgt.tgt_vp_map)
4845 return -ENOMEM;
4846
4847 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4848 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4849 &ha->tgt.atio_dma, GFP_KERNEL);
4850 if (!ha->tgt.atio_ring) {
4851 kfree(ha->tgt.tgt_vp_map);
4852 return -ENOMEM;
4853 }
4854 return 0;
4855}
4856
4857void
4858qlt_mem_free(struct qla_hw_data *ha)
4859{
4860 if (!QLA_TGT_MODE_ENABLED())
4861 return;
4862
4863 if (ha->tgt.atio_ring) {
4864 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4865 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4866 ha->tgt.atio_dma);
4867 }
4868 kfree(ha->tgt.tgt_vp_map);
4869}
4870
4871/* vport_slock to be held by the caller */
4872void
4873qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4874{
4875 if (!QLA_TGT_MODE_ENABLED())
4876 return;
4877
4878 switch (cmd) {
4879 case SET_VP_IDX:
4880 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4881 break;
4882 case SET_AL_PA:
4883 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4884 break;
4885 case RESET_VP_IDX:
4886 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4887 break;
4888 case RESET_AL_PA:
4889 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4890 break;
4891 }
4892}
4893
4894static int __init qlt_parse_ini_mode(void)
4895{
4896 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4897 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4898 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4899 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4900 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4901 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4902 else
4903 return false;
4904
4905 return true;
4906}
4907
4908int __init qlt_init(void)
4909{
4910 int ret;
4911
4912 if (!qlt_parse_ini_mode()) {
4913 ql_log(ql_log_fatal, NULL, 0xe06b,
4914 "qlt_parse_ini_mode() failed\n");
4915 return -EINVAL;
4916 }
4917
4918 if (!QLA_TGT_MODE_ENABLED())
4919 return 0;
4920
4921 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4922 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4923 NULL);
4924 if (!qla_tgt_cmd_cachep) {
4925 ql_log(ql_log_fatal, NULL, 0xe06c,
4926 "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4927 return -ENOMEM;
4928 }
4929
4930 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4931 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4932 qla_tgt_mgmt_cmd), 0, NULL);
4933 if (!qla_tgt_mgmt_cmd_cachep) {
4934 ql_log(ql_log_fatal, NULL, 0xe06d,
4935 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4936 ret = -ENOMEM;
4937 goto out;
4938 }
4939
4940 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4941 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4942 if (!qla_tgt_mgmt_cmd_mempool) {
4943 ql_log(ql_log_fatal, NULL, 0xe06e,
4944 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4945 ret = -ENOMEM;
4946 goto out_mgmt_cmd_cachep;
4947 }
4948
4949 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4950 if (!qla_tgt_wq) {
4951 ql_log(ql_log_fatal, NULL, 0xe06f,
4952 "alloc_workqueue for qla_tgt_wq failed\n");
4953 ret = -ENOMEM;
4954 goto out_cmd_mempool;
4955 }
4956 /*
4957 * Return 1 to signal that initiator-mode is being disabled
4958 */
4959 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4960
4961out_cmd_mempool:
4962 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4963out_mgmt_cmd_cachep:
4964 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4965out:
4966 kmem_cache_destroy(qla_tgt_cmd_cachep);
4967 return ret;
4968}
4969
4970void qlt_exit(void)
4971{
4972 if (!QLA_TGT_MODE_ENABLED())
4973 return;
4974
4975 destroy_workqueue(qla_tgt_wq);
4976 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4977 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4978 kmem_cache_destroy(qla_tgt_cmd_cachep);
4979}
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