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Merge tag 'cpuinit-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg...
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / qla2xxx / qla_target.c
1 /*
2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
3 *
4 * based on qla2x00t.c code:
5 *
6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
7 * Copyright (C) 2004 - 2005 Leonid Stoljar
8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
9 * Copyright (C) 2006 - 2010 ID7 Ltd.
10 *
11 * Forward port and refactoring to modern qla2xxx and target/configfs
12 *
13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation, version 2
18 * of the License.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 */
25
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/blkdev.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/delay.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <asm/unaligned.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_tcq.h>
39 #include <target/target_core_base.h>
40 #include <target/target_core_fabric.h>
41
42 #include "qla_def.h"
43 #include "qla_target.h"
44
45 static int ql2xtgt_tape_enable;
46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
48 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
49
50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
51 module_param(qlini_mode, charp, S_IRUGO);
52 MODULE_PARM_DESC(qlini_mode,
53 "Determines when initiator mode will be enabled. Possible values: "
54 "\"exclusive\" - initiator mode will be enabled on load, "
55 "disabled on enabling target mode and then on disabling target mode "
56 "enabled back; "
57 "\"disabled\" - initiator mode will never be enabled; "
58 "\"enabled\" (default) - initiator mode will always stay enabled.");
59
60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
61
62 static int temp_sam_status = SAM_STAT_BUSY;
63
64 /*
65 * From scsi/fc/fc_fcp.h
66 */
67 enum fcp_resp_rsp_codes {
68 FCP_TMF_CMPL = 0,
69 FCP_DATA_LEN_INVALID = 1,
70 FCP_CMND_FIELDS_INVALID = 2,
71 FCP_DATA_PARAM_MISMATCH = 3,
72 FCP_TMF_REJECTED = 4,
73 FCP_TMF_FAILED = 5,
74 FCP_TMF_INVALID_LUN = 9,
75 };
76
77 /*
78 * fc_pri_ta from scsi/fc/fc_fcp.h
79 */
80 #define FCP_PTA_SIMPLE 0 /* simple task attribute */
81 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */
82 #define FCP_PTA_ORDERED 2 /* ordered task attribute */
83 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */
84 #define FCP_PTA_MASK 7 /* mask for task attribute field */
85 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */
86 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */
87
88 /*
89 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
90 * must be called under HW lock and could unlock/lock it inside.
91 * It isn't an issue, since in the current implementation on the time when
92 * those functions are called:
93 *
94 * - Either context is IRQ and only IRQ handler can modify HW data,
95 * including rings related fields,
96 *
97 * - Or access to target mode variables from struct qla_tgt doesn't
98 * cross those functions boundaries, except tgt_stop, which
99 * additionally protected by irq_cmd_count.
100 */
101 /* Predefs for callbacks handed to qla2xxx LLD */
102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
103 struct atio_from_isp *pkt);
104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
106 int fn, void *iocb, int flags);
107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
108 *cmd, struct atio_from_isp *atio, int ha_locked);
109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
110 struct qla_tgt_srr_imm *imm, int ha_lock);
111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
112 struct qla_tgt_cmd *cmd);
113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
114 struct atio_from_isp *atio, uint16_t status, int qfull);
115 static void qlt_disable_vha(struct scsi_qla_host *vha);
116 /*
117 * Global Variables
118 */
119 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
120 static mempool_t *qla_tgt_mgmt_cmd_mempool;
121 static struct workqueue_struct *qla_tgt_wq;
122 static DEFINE_MUTEX(qla_tgt_mutex);
123 static LIST_HEAD(qla_tgt_glist);
124
125 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
126 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
127 struct qla_tgt *tgt,
128 const uint8_t *port_name)
129 {
130 struct qla_tgt_sess *sess;
131
132 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
133 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
134 return sess;
135 }
136
137 return NULL;
138 }
139
140 /* Might release hw lock, then reaquire!! */
141 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
142 {
143 /* Send marker if required */
144 if (unlikely(vha->marker_needed != 0)) {
145 int rc = qla2x00_issue_marker(vha, vha_locked);
146 if (rc != QLA_SUCCESS) {
147 ql_dbg(ql_dbg_tgt, vha, 0xe03d,
148 "qla_target(%d): issue_marker() failed\n",
149 vha->vp_idx);
150 }
151 return rc;
152 }
153 return QLA_SUCCESS;
154 }
155
156 static inline
157 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
158 uint8_t *d_id)
159 {
160 struct qla_hw_data *ha = vha->hw;
161 uint8_t vp_idx;
162
163 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
164 return NULL;
165
166 if (vha->d_id.b.al_pa == d_id[2])
167 return vha;
168
169 BUG_ON(ha->tgt.tgt_vp_map == NULL);
170 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
171 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
172 return ha->tgt.tgt_vp_map[vp_idx].vha;
173
174 return NULL;
175 }
176
177 static inline
178 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
179 uint16_t vp_idx)
180 {
181 struct qla_hw_data *ha = vha->hw;
182
183 if (vha->vp_idx == vp_idx)
184 return vha;
185
186 BUG_ON(ha->tgt.tgt_vp_map == NULL);
187 if (likely(test_bit(vp_idx, ha->vp_idx_map)))
188 return ha->tgt.tgt_vp_map[vp_idx].vha;
189
190 return NULL;
191 }
192
193 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
194 {
195 unsigned long flags;
196
197 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
198
199 vha->hw->tgt.num_pend_cmds++;
200 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
201 vha->hw->qla_stats.stat_max_pend_cmds =
202 vha->hw->tgt.num_pend_cmds;
203 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
204 }
205 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
206 {
207 unsigned long flags;
208
209 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
210 vha->hw->tgt.num_pend_cmds--;
211 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
212 }
213
214 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
215 struct atio_from_isp *atio)
216 {
217 ql_dbg(ql_dbg_tgt, vha, 0xe072,
218 "%s: qla_target(%d): type %x ox_id %04x\n",
219 __func__, vha->vp_idx, atio->u.raw.entry_type,
220 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
221
222 switch (atio->u.raw.entry_type) {
223 case ATIO_TYPE7:
224 {
225 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
226 atio->u.isp24.fcp_hdr.d_id);
227 if (unlikely(NULL == host)) {
228 ql_dbg(ql_dbg_tgt, vha, 0xe03e,
229 "qla_target(%d): Received ATIO_TYPE7 "
230 "with unknown d_id %x:%x:%x\n", vha->vp_idx,
231 atio->u.isp24.fcp_hdr.d_id[0],
232 atio->u.isp24.fcp_hdr.d_id[1],
233 atio->u.isp24.fcp_hdr.d_id[2]);
234 break;
235 }
236 qlt_24xx_atio_pkt(host, atio);
237 break;
238 }
239
240 case IMMED_NOTIFY_TYPE:
241 {
242 struct scsi_qla_host *host = vha;
243 struct imm_ntfy_from_isp *entry =
244 (struct imm_ntfy_from_isp *)atio;
245
246 if ((entry->u.isp24.vp_index != 0xFF) &&
247 (entry->u.isp24.nport_handle != 0xFFFF)) {
248 host = qlt_find_host_by_vp_idx(vha,
249 entry->u.isp24.vp_index);
250 if (unlikely(!host)) {
251 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
252 "qla_target(%d): Received "
253 "ATIO (IMMED_NOTIFY_TYPE) "
254 "with unknown vp_index %d\n",
255 vha->vp_idx, entry->u.isp24.vp_index);
256 break;
257 }
258 }
259 qlt_24xx_atio_pkt(host, atio);
260 break;
261 }
262
263 default:
264 ql_dbg(ql_dbg_tgt, vha, 0xe040,
265 "qla_target(%d): Received unknown ATIO atio "
266 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
267 break;
268 }
269
270 return;
271 }
272
273 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
274 {
275 switch (pkt->entry_type) {
276 case CTIO_CRC2:
277 ql_dbg(ql_dbg_tgt, vha, 0xe073,
278 "qla_target(%d):%s: CRC2 Response pkt\n",
279 vha->vp_idx, __func__);
280 case CTIO_TYPE7:
281 {
282 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
283 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
284 entry->vp_index);
285 if (unlikely(!host)) {
286 ql_dbg(ql_dbg_tgt, vha, 0xe041,
287 "qla_target(%d): Response pkt (CTIO_TYPE7) "
288 "received, with unknown vp_index %d\n",
289 vha->vp_idx, entry->vp_index);
290 break;
291 }
292 qlt_response_pkt(host, pkt);
293 break;
294 }
295
296 case IMMED_NOTIFY_TYPE:
297 {
298 struct scsi_qla_host *host = vha;
299 struct imm_ntfy_from_isp *entry =
300 (struct imm_ntfy_from_isp *)pkt;
301
302 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
303 if (unlikely(!host)) {
304 ql_dbg(ql_dbg_tgt, vha, 0xe042,
305 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
306 "received, with unknown vp_index %d\n",
307 vha->vp_idx, entry->u.isp24.vp_index);
308 break;
309 }
310 qlt_response_pkt(host, pkt);
311 break;
312 }
313
314 case NOTIFY_ACK_TYPE:
315 {
316 struct scsi_qla_host *host = vha;
317 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
318
319 if (0xFF != entry->u.isp24.vp_index) {
320 host = qlt_find_host_by_vp_idx(vha,
321 entry->u.isp24.vp_index);
322 if (unlikely(!host)) {
323 ql_dbg(ql_dbg_tgt, vha, 0xe043,
324 "qla_target(%d): Response "
325 "pkt (NOTIFY_ACK_TYPE) "
326 "received, with unknown "
327 "vp_index %d\n", vha->vp_idx,
328 entry->u.isp24.vp_index);
329 break;
330 }
331 }
332 qlt_response_pkt(host, pkt);
333 break;
334 }
335
336 case ABTS_RECV_24XX:
337 {
338 struct abts_recv_from_24xx *entry =
339 (struct abts_recv_from_24xx *)pkt;
340 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
341 entry->vp_index);
342 if (unlikely(!host)) {
343 ql_dbg(ql_dbg_tgt, vha, 0xe044,
344 "qla_target(%d): Response pkt "
345 "(ABTS_RECV_24XX) received, with unknown "
346 "vp_index %d\n", vha->vp_idx, entry->vp_index);
347 break;
348 }
349 qlt_response_pkt(host, pkt);
350 break;
351 }
352
353 case ABTS_RESP_24XX:
354 {
355 struct abts_resp_to_24xx *entry =
356 (struct abts_resp_to_24xx *)pkt;
357 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
358 entry->vp_index);
359 if (unlikely(!host)) {
360 ql_dbg(ql_dbg_tgt, vha, 0xe045,
361 "qla_target(%d): Response pkt "
362 "(ABTS_RECV_24XX) received, with unknown "
363 "vp_index %d\n", vha->vp_idx, entry->vp_index);
364 break;
365 }
366 qlt_response_pkt(host, pkt);
367 break;
368 }
369
370 default:
371 qlt_response_pkt(vha, pkt);
372 break;
373 }
374
375 }
376
377 static void qlt_free_session_done(struct work_struct *work)
378 {
379 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
380 free_work);
381 struct qla_tgt *tgt = sess->tgt;
382 struct scsi_qla_host *vha = sess->vha;
383 struct qla_hw_data *ha = vha->hw;
384
385 BUG_ON(!tgt);
386 /*
387 * Release the target session for FC Nexus from fabric module code.
388 */
389 if (sess->se_sess != NULL)
390 ha->tgt.tgt_ops->free_session(sess);
391
392 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
393 "Unregistration of sess %p finished\n", sess);
394
395 kfree(sess);
396 /*
397 * We need to protect against race, when tgt is freed before or
398 * inside wake_up()
399 */
400 tgt->sess_count--;
401 if (tgt->sess_count == 0)
402 wake_up_all(&tgt->waitQ);
403 }
404
405 /* ha->hardware_lock supposed to be held on entry */
406 void qlt_unreg_sess(struct qla_tgt_sess *sess)
407 {
408 struct scsi_qla_host *vha = sess->vha;
409
410 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
411
412 list_del(&sess->sess_list_entry);
413 if (sess->deleted)
414 list_del(&sess->del_list_entry);
415
416 INIT_WORK(&sess->free_work, qlt_free_session_done);
417 schedule_work(&sess->free_work);
418 }
419 EXPORT_SYMBOL(qlt_unreg_sess);
420
421 /* ha->hardware_lock supposed to be held on entry */
422 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
423 {
424 struct qla_hw_data *ha = vha->hw;
425 struct qla_tgt_sess *sess = NULL;
426 uint32_t unpacked_lun, lun = 0;
427 uint16_t loop_id;
428 int res = 0;
429 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
430 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
431
432 loop_id = le16_to_cpu(n->u.isp24.nport_handle);
433 if (loop_id == 0xFFFF) {
434 #if 0 /* FIXME: Re-enable Global event handling.. */
435 /* Global event */
436 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
437 qlt_clear_tgt_db(ha->tgt.qla_tgt);
438 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
439 sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
440 typeof(*sess), sess_list_entry);
441 switch (mcmd) {
442 case QLA_TGT_NEXUS_LOSS_SESS:
443 mcmd = QLA_TGT_NEXUS_LOSS;
444 break;
445 case QLA_TGT_ABORT_ALL_SESS:
446 mcmd = QLA_TGT_ABORT_ALL;
447 break;
448 case QLA_TGT_NEXUS_LOSS:
449 case QLA_TGT_ABORT_ALL:
450 break;
451 default:
452 ql_dbg(ql_dbg_tgt, vha, 0xe046,
453 "qla_target(%d): Not allowed "
454 "command %x in %s", vha->vp_idx,
455 mcmd, __func__);
456 sess = NULL;
457 break;
458 }
459 } else
460 sess = NULL;
461 #endif
462 } else {
463 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
464 }
465
466 ql_dbg(ql_dbg_tgt, vha, 0xe000,
467 "Using sess for qla_tgt_reset: %p\n", sess);
468 if (!sess) {
469 res = -ESRCH;
470 return res;
471 }
472
473 ql_dbg(ql_dbg_tgt, vha, 0xe047,
474 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
475 "loop_id %d)\n", vha->host_no, sess, sess->port_name,
476 mcmd, loop_id);
477
478 lun = a->u.isp24.fcp_cmnd.lun;
479 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
480
481 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
482 iocb, QLA24XX_MGMT_SEND_NACK);
483 }
484
485 /* ha->hardware_lock supposed to be held on entry */
486 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
487 bool immediate)
488 {
489 struct qla_tgt *tgt = sess->tgt;
490 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
491
492 if (sess->deleted)
493 return;
494
495 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
496 "Scheduling sess %p for deletion\n", sess);
497 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
498 sess->deleted = 1;
499
500 if (immediate)
501 dev_loss_tmo = 0;
502
503 sess->expires = jiffies + dev_loss_tmo * HZ;
504
505 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
506 "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
507 "deletion in %u secs (expires: %lu) immed: %d\n",
508 sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
509 sess->expires, immediate);
510
511 if (immediate)
512 schedule_delayed_work(&tgt->sess_del_work, 0);
513 else
514 schedule_delayed_work(&tgt->sess_del_work,
515 sess->expires - jiffies);
516 }
517
518 /* ha->hardware_lock supposed to be held on entry */
519 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
520 {
521 struct qla_tgt_sess *sess;
522
523 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
524 qlt_schedule_sess_for_deletion(sess, true);
525
526 /* At this point tgt could be already dead */
527 }
528
529 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
530 uint16_t *loop_id)
531 {
532 struct qla_hw_data *ha = vha->hw;
533 dma_addr_t gid_list_dma;
534 struct gid_list_info *gid_list;
535 char *id_iter;
536 int res, rc, i;
537 uint16_t entries;
538
539 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
540 &gid_list_dma, GFP_KERNEL);
541 if (!gid_list) {
542 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
543 "qla_target(%d): DMA Alloc failed of %u\n",
544 vha->vp_idx, qla2x00_gid_list_size(ha));
545 return -ENOMEM;
546 }
547
548 /* Get list of logged in devices */
549 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
550 if (rc != QLA_SUCCESS) {
551 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
552 "qla_target(%d): get_id_list() failed: %x\n",
553 vha->vp_idx, rc);
554 res = -1;
555 goto out_free_id_list;
556 }
557
558 id_iter = (char *)gid_list;
559 res = -1;
560 for (i = 0; i < entries; i++) {
561 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
562 if ((gid->al_pa == s_id[2]) &&
563 (gid->area == s_id[1]) &&
564 (gid->domain == s_id[0])) {
565 *loop_id = le16_to_cpu(gid->loop_id);
566 res = 0;
567 break;
568 }
569 id_iter += ha->gid_list_info_size;
570 }
571
572 out_free_id_list:
573 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
574 gid_list, gid_list_dma);
575 return res;
576 }
577
578 /* ha->hardware_lock supposed to be held on entry */
579 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
580 {
581 BUG_ON(!sess->deleted);
582
583 list_del(&sess->del_list_entry);
584 sess->deleted = 0;
585 }
586
587 static void qlt_del_sess_work_fn(struct delayed_work *work)
588 {
589 struct qla_tgt *tgt = container_of(work, struct qla_tgt,
590 sess_del_work);
591 struct scsi_qla_host *vha = tgt->vha;
592 struct qla_hw_data *ha = vha->hw;
593 struct qla_tgt_sess *sess;
594 unsigned long flags, elapsed;
595
596 spin_lock_irqsave(&ha->hardware_lock, flags);
597 while (!list_empty(&tgt->del_sess_list)) {
598 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
599 del_list_entry);
600 elapsed = jiffies;
601 if (time_after_eq(elapsed, sess->expires)) {
602 qlt_undelete_sess(sess);
603
604 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
605 "Timeout: sess %p about to be deleted\n",
606 sess);
607 ha->tgt.tgt_ops->shutdown_sess(sess);
608 ha->tgt.tgt_ops->put_sess(sess);
609 } else {
610 schedule_delayed_work(&tgt->sess_del_work,
611 sess->expires - elapsed);
612 break;
613 }
614 }
615 spin_unlock_irqrestore(&ha->hardware_lock, flags);
616 }
617
618 /*
619 * Adds an extra ref to allow to drop hw lock after adding sess to the list.
620 * Caller must put it.
621 */
622 static struct qla_tgt_sess *qlt_create_sess(
623 struct scsi_qla_host *vha,
624 fc_port_t *fcport,
625 bool local)
626 {
627 struct qla_hw_data *ha = vha->hw;
628 struct qla_tgt_sess *sess;
629 unsigned long flags;
630 unsigned char be_sid[3];
631
632 /* Check to avoid double sessions */
633 spin_lock_irqsave(&ha->hardware_lock, flags);
634 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
635 sess_list_entry) {
636 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
637 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
638 "Double sess %p found (s_id %x:%x:%x, "
639 "loop_id %d), updating to d_id %x:%x:%x, "
640 "loop_id %d", sess, sess->s_id.b.domain,
641 sess->s_id.b.al_pa, sess->s_id.b.area,
642 sess->loop_id, fcport->d_id.b.domain,
643 fcport->d_id.b.al_pa, fcport->d_id.b.area,
644 fcport->loop_id);
645
646 if (sess->deleted)
647 qlt_undelete_sess(sess);
648
649 kref_get(&sess->se_sess->sess_kref);
650 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
651 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
652
653 if (sess->local && !local)
654 sess->local = 0;
655 spin_unlock_irqrestore(&ha->hardware_lock, flags);
656
657 return sess;
658 }
659 }
660 spin_unlock_irqrestore(&ha->hardware_lock, flags);
661
662 sess = kzalloc(sizeof(*sess), GFP_KERNEL);
663 if (!sess) {
664 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
665 "qla_target(%u): session allocation failed, all commands "
666 "from port %8phC will be refused", vha->vp_idx,
667 fcport->port_name);
668
669 return NULL;
670 }
671 sess->tgt = vha->vha_tgt.qla_tgt;
672 sess->vha = vha;
673 sess->s_id = fcport->d_id;
674 sess->loop_id = fcport->loop_id;
675 sess->local = local;
676
677 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
678 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
679 sess, vha->vha_tgt.qla_tgt);
680
681 be_sid[0] = sess->s_id.b.domain;
682 be_sid[1] = sess->s_id.b.area;
683 be_sid[2] = sess->s_id.b.al_pa;
684 /*
685 * Determine if this fc_port->port_name is allowed to access
686 * target mode using explict NodeACLs+MappedLUNs, or using
687 * TPG demo mode. If this is successful a target mode FC nexus
688 * is created.
689 */
690 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
691 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
692 kfree(sess);
693 return NULL;
694 }
695 /*
696 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
697 * access across ->hardware_lock reaquire.
698 */
699 kref_get(&sess->se_sess->sess_kref);
700
701 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
702 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
703 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
704
705 spin_lock_irqsave(&ha->hardware_lock, flags);
706 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
707 vha->vha_tgt.qla_tgt->sess_count++;
708 spin_unlock_irqrestore(&ha->hardware_lock, flags);
709
710 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
711 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
712 "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
713 vha->vp_idx, local ? "local " : "", fcport->port_name,
714 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
715 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not ");
716
717 return sess;
718 }
719
720 /*
721 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
722 */
723 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
724 {
725 struct qla_hw_data *ha = vha->hw;
726 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
727 struct qla_tgt_sess *sess;
728 unsigned long flags;
729
730 if (!vha->hw->tgt.tgt_ops)
731 return;
732
733 if (!tgt || (fcport->port_type != FCT_INITIATOR))
734 return;
735
736 if (qla_ini_mode_enabled(vha))
737 return;
738
739 spin_lock_irqsave(&ha->hardware_lock, flags);
740 if (tgt->tgt_stop) {
741 spin_unlock_irqrestore(&ha->hardware_lock, flags);
742 return;
743 }
744 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
745 if (!sess) {
746 spin_unlock_irqrestore(&ha->hardware_lock, flags);
747
748 mutex_lock(&vha->vha_tgt.tgt_mutex);
749 sess = qlt_create_sess(vha, fcport, false);
750 mutex_unlock(&vha->vha_tgt.tgt_mutex);
751
752 spin_lock_irqsave(&ha->hardware_lock, flags);
753 } else {
754 kref_get(&sess->se_sess->sess_kref);
755
756 if (sess->deleted) {
757 qlt_undelete_sess(sess);
758
759 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
760 "qla_target(%u): %ssession for port %8phC "
761 "(loop ID %d) reappeared\n", vha->vp_idx,
762 sess->local ? "local " : "", sess->port_name,
763 sess->loop_id);
764
765 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
766 "Reappeared sess %p\n", sess);
767 }
768 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
769 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
770 }
771
772 if (sess && sess->local) {
773 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
774 "qla_target(%u): local session for "
775 "port %8phC (loop ID %d) became global\n", vha->vp_idx,
776 fcport->port_name, sess->loop_id);
777 sess->local = 0;
778 }
779 ha->tgt.tgt_ops->put_sess(sess);
780 spin_unlock_irqrestore(&ha->hardware_lock, flags);
781 }
782
783 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
784 {
785 struct qla_hw_data *ha = vha->hw;
786 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
787 struct qla_tgt_sess *sess;
788 unsigned long flags;
789
790 if (!vha->hw->tgt.tgt_ops)
791 return;
792
793 if (!tgt || (fcport->port_type != FCT_INITIATOR))
794 return;
795
796 spin_lock_irqsave(&ha->hardware_lock, flags);
797 if (tgt->tgt_stop) {
798 spin_unlock_irqrestore(&ha->hardware_lock, flags);
799 return;
800 }
801 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
802 if (!sess) {
803 spin_unlock_irqrestore(&ha->hardware_lock, flags);
804 return;
805 }
806
807 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
808
809 sess->local = 1;
810 qlt_schedule_sess_for_deletion(sess, false);
811 spin_unlock_irqrestore(&ha->hardware_lock, flags);
812 }
813
814 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
815 {
816 struct qla_hw_data *ha = tgt->ha;
817 unsigned long flags;
818 int res;
819 /*
820 * We need to protect against race, when tgt is freed before or
821 * inside wake_up()
822 */
823 spin_lock_irqsave(&ha->hardware_lock, flags);
824 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
825 "tgt %p, empty(sess_list)=%d sess_count=%d\n",
826 tgt, list_empty(&tgt->sess_list), tgt->sess_count);
827 res = (tgt->sess_count == 0);
828 spin_unlock_irqrestore(&ha->hardware_lock, flags);
829
830 return res;
831 }
832
833 /* Called by tcm_qla2xxx configfs code */
834 int qlt_stop_phase1(struct qla_tgt *tgt)
835 {
836 struct scsi_qla_host *vha = tgt->vha;
837 struct qla_hw_data *ha = tgt->ha;
838 unsigned long flags;
839
840 mutex_lock(&qla_tgt_mutex);
841 if (!vha->fc_vport) {
842 struct Scsi_Host *sh = vha->host;
843 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
844 bool npiv_vports;
845
846 spin_lock_irqsave(sh->host_lock, flags);
847 npiv_vports = (fc_host->npiv_vports_inuse);
848 spin_unlock_irqrestore(sh->host_lock, flags);
849
850 if (npiv_vports) {
851 mutex_unlock(&qla_tgt_mutex);
852 return -EPERM;
853 }
854 }
855 if (tgt->tgt_stop || tgt->tgt_stopped) {
856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
857 "Already in tgt->tgt_stop or tgt_stopped state\n");
858 mutex_unlock(&qla_tgt_mutex);
859 return -EPERM;
860 }
861
862 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
863 vha->host_no, vha);
864 /*
865 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
866 * Lock is needed, because we still can get an incoming packet.
867 */
868 mutex_lock(&vha->vha_tgt.tgt_mutex);
869 spin_lock_irqsave(&ha->hardware_lock, flags);
870 tgt->tgt_stop = 1;
871 qlt_clear_tgt_db(tgt);
872 spin_unlock_irqrestore(&ha->hardware_lock, flags);
873 mutex_unlock(&vha->vha_tgt.tgt_mutex);
874 mutex_unlock(&qla_tgt_mutex);
875
876 flush_delayed_work(&tgt->sess_del_work);
877
878 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
879 "Waiting for sess works (tgt %p)", tgt);
880 spin_lock_irqsave(&tgt->sess_work_lock, flags);
881 while (!list_empty(&tgt->sess_works_list)) {
882 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
883 flush_scheduled_work();
884 spin_lock_irqsave(&tgt->sess_work_lock, flags);
885 }
886 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
887
888 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
889 "Waiting for tgt %p: list_empty(sess_list)=%d "
890 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
891 tgt->sess_count);
892
893 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
894
895 /* Big hammer */
896 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
897 qlt_disable_vha(vha);
898
899 /* Wait for sessions to clear out (just in case) */
900 wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
901 return 0;
902 }
903 EXPORT_SYMBOL(qlt_stop_phase1);
904
905 /* Called by tcm_qla2xxx configfs code */
906 void qlt_stop_phase2(struct qla_tgt *tgt)
907 {
908 struct qla_hw_data *ha = tgt->ha;
909 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
910 unsigned long flags;
911
912 if (tgt->tgt_stopped) {
913 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
914 "Already in tgt->tgt_stopped state\n");
915 dump_stack();
916 return;
917 }
918
919 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
920 "Waiting for %d IRQ commands to complete (tgt %p)",
921 tgt->irq_cmd_count, tgt);
922
923 mutex_lock(&vha->vha_tgt.tgt_mutex);
924 spin_lock_irqsave(&ha->hardware_lock, flags);
925 while (tgt->irq_cmd_count != 0) {
926 spin_unlock_irqrestore(&ha->hardware_lock, flags);
927 udelay(2);
928 spin_lock_irqsave(&ha->hardware_lock, flags);
929 }
930 tgt->tgt_stop = 0;
931 tgt->tgt_stopped = 1;
932 spin_unlock_irqrestore(&ha->hardware_lock, flags);
933 mutex_unlock(&vha->vha_tgt.tgt_mutex);
934
935 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
936 tgt);
937 }
938 EXPORT_SYMBOL(qlt_stop_phase2);
939
940 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
941 static void qlt_release(struct qla_tgt *tgt)
942 {
943 scsi_qla_host_t *vha = tgt->vha;
944
945 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
946 qlt_stop_phase2(tgt);
947
948 vha->vha_tgt.qla_tgt = NULL;
949
950 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
951 "Release of tgt %p finished\n", tgt);
952
953 kfree(tgt);
954 }
955
956 /* ha->hardware_lock supposed to be held on entry */
957 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
958 const void *param, unsigned int param_size)
959 {
960 struct qla_tgt_sess_work_param *prm;
961 unsigned long flags;
962
963 prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
964 if (!prm) {
965 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
966 "qla_target(%d): Unable to create session "
967 "work, command will be refused", 0);
968 return -ENOMEM;
969 }
970
971 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
972 "Scheduling work (type %d, prm %p)"
973 " to find session for param %p (size %d, tgt %p)\n",
974 type, prm, param, param_size, tgt);
975
976 prm->type = type;
977 memcpy(&prm->tm_iocb, param, param_size);
978
979 spin_lock_irqsave(&tgt->sess_work_lock, flags);
980 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
981 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
982
983 schedule_work(&tgt->sess_work);
984
985 return 0;
986 }
987
988 /*
989 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
990 */
991 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
992 struct imm_ntfy_from_isp *ntfy,
993 uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
994 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
995 {
996 struct qla_hw_data *ha = vha->hw;
997 request_t *pkt;
998 struct nack_to_isp *nack;
999
1000 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1001
1002 /* Send marker if required */
1003 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1004 return;
1005
1006 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1007 if (!pkt) {
1008 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1009 "qla_target(%d): %s failed: unable to allocate "
1010 "request packet\n", vha->vp_idx, __func__);
1011 return;
1012 }
1013
1014 if (vha->vha_tgt.qla_tgt != NULL)
1015 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1016
1017 pkt->entry_type = NOTIFY_ACK_TYPE;
1018 pkt->entry_count = 1;
1019
1020 nack = (struct nack_to_isp *)pkt;
1021 nack->ox_id = ntfy->ox_id;
1022
1023 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1024 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1025 nack->u.isp24.flags = ntfy->u.isp24.flags &
1026 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1027 }
1028 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1029 nack->u.isp24.status = ntfy->u.isp24.status;
1030 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1031 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1032 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1033 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1034 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1035 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1036 nack->u.isp24.srr_reject_code = srr_reject_code;
1037 nack->u.isp24.srr_reject_code_expl = srr_explan;
1038 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1039
1040 ql_dbg(ql_dbg_tgt, vha, 0xe005,
1041 "qla_target(%d): Sending 24xx Notify Ack %d\n",
1042 vha->vp_idx, nack->u.isp24.status);
1043
1044 /* Memory Barrier */
1045 wmb();
1046 qla2x00_start_iocbs(vha, vha->req);
1047 }
1048
1049 /*
1050 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1051 */
1052 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1053 struct abts_recv_from_24xx *abts, uint32_t status,
1054 bool ids_reversed)
1055 {
1056 struct qla_hw_data *ha = vha->hw;
1057 struct abts_resp_to_24xx *resp;
1058 uint32_t f_ctl;
1059 uint8_t *p;
1060
1061 ql_dbg(ql_dbg_tgt, vha, 0xe006,
1062 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1063 ha, abts, status);
1064
1065 /* Send marker if required */
1066 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1067 return;
1068
1069 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1070 if (!resp) {
1071 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1072 "qla_target(%d): %s failed: unable to allocate "
1073 "request packet", vha->vp_idx, __func__);
1074 return;
1075 }
1076
1077 resp->entry_type = ABTS_RESP_24XX;
1078 resp->entry_count = 1;
1079 resp->nport_handle = abts->nport_handle;
1080 resp->vp_index = vha->vp_idx;
1081 resp->sof_type = abts->sof_type;
1082 resp->exchange_address = abts->exchange_address;
1083 resp->fcp_hdr_le = abts->fcp_hdr_le;
1084 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1085 F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1086 F_CTL_SEQ_INITIATIVE);
1087 p = (uint8_t *)&f_ctl;
1088 resp->fcp_hdr_le.f_ctl[0] = *p++;
1089 resp->fcp_hdr_le.f_ctl[1] = *p++;
1090 resp->fcp_hdr_le.f_ctl[2] = *p;
1091 if (ids_reversed) {
1092 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1093 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1094 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1095 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1096 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1097 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1098 } else {
1099 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1100 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1101 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1102 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1103 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1104 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1105 }
1106 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1107 if (status == FCP_TMF_CMPL) {
1108 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1109 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1110 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1111 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1112 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1113 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1114 } else {
1115 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1116 resp->payload.ba_rjt.reason_code =
1117 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1118 /* Other bytes are zero */
1119 }
1120
1121 vha->vha_tgt.qla_tgt->abts_resp_expected++;
1122
1123 /* Memory Barrier */
1124 wmb();
1125 qla2x00_start_iocbs(vha, vha->req);
1126 }
1127
1128 /*
1129 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1130 */
1131 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1132 struct abts_resp_from_24xx_fw *entry)
1133 {
1134 struct ctio7_to_24xx *ctio;
1135
1136 ql_dbg(ql_dbg_tgt, vha, 0xe007,
1137 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1138 /* Send marker if required */
1139 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1140 return;
1141
1142 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1143 if (ctio == NULL) {
1144 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1145 "qla_target(%d): %s failed: unable to allocate "
1146 "request packet\n", vha->vp_idx, __func__);
1147 return;
1148 }
1149
1150 /*
1151 * We've got on entrance firmware's response on by us generated
1152 * ABTS response. So, in it ID fields are reversed.
1153 */
1154
1155 ctio->entry_type = CTIO_TYPE7;
1156 ctio->entry_count = 1;
1157 ctio->nport_handle = entry->nport_handle;
1158 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1159 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1160 ctio->vp_index = vha->vp_idx;
1161 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1162 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1163 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1164 ctio->exchange_addr = entry->exchange_addr_to_abort;
1165 ctio->u.status1.flags =
1166 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1167 CTIO7_FLAGS_TERMINATE);
1168 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1169
1170 /* Memory Barrier */
1171 wmb();
1172 qla2x00_start_iocbs(vha, vha->req);
1173
1174 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1175 FCP_TMF_CMPL, true);
1176 }
1177
1178 /* ha->hardware_lock supposed to be held on entry */
1179 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1180 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1181 {
1182 struct qla_hw_data *ha = vha->hw;
1183 struct se_session *se_sess = sess->se_sess;
1184 struct qla_tgt_mgmt_cmd *mcmd;
1185 struct se_cmd *se_cmd;
1186 u32 lun = 0;
1187 int rc;
1188 bool found_lun = false;
1189
1190 spin_lock(&se_sess->sess_cmd_lock);
1191 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1192 struct qla_tgt_cmd *cmd =
1193 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1194 if (cmd->tag == abts->exchange_addr_to_abort) {
1195 lun = cmd->unpacked_lun;
1196 found_lun = true;
1197 break;
1198 }
1199 }
1200 spin_unlock(&se_sess->sess_cmd_lock);
1201
1202 if (!found_lun)
1203 return -ENOENT;
1204
1205 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1206 "qla_target(%d): task abort (tag=%d)\n",
1207 vha->vp_idx, abts->exchange_addr_to_abort);
1208
1209 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1210 if (mcmd == NULL) {
1211 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1212 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1213 vha->vp_idx, __func__);
1214 return -ENOMEM;
1215 }
1216 memset(mcmd, 0, sizeof(*mcmd));
1217
1218 mcmd->sess = sess;
1219 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1220 mcmd->reset_count = vha->hw->chip_reset;
1221
1222 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1223 abts->exchange_addr_to_abort);
1224 if (rc != 0) {
1225 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1226 "qla_target(%d): tgt_ops->handle_tmr()"
1227 " failed: %d", vha->vp_idx, rc);
1228 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1229 return -EFAULT;
1230 }
1231
1232 return 0;
1233 }
1234
1235 /*
1236 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1237 */
1238 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1239 struct abts_recv_from_24xx *abts)
1240 {
1241 struct qla_hw_data *ha = vha->hw;
1242 struct qla_tgt_sess *sess;
1243 uint32_t tag = abts->exchange_addr_to_abort;
1244 uint8_t s_id[3];
1245 int rc;
1246
1247 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1248 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1249 "qla_target(%d): ABTS: Abort Sequence not "
1250 "supported\n", vha->vp_idx);
1251 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1252 return;
1253 }
1254
1255 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1256 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1257 "qla_target(%d): ABTS: Unknown Exchange "
1258 "Address received\n", vha->vp_idx);
1259 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1260 return;
1261 }
1262
1263 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1264 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1265 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1266 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1267 le32_to_cpu(abts->fcp_hdr_le.parameter));
1268
1269 s_id[0] = abts->fcp_hdr_le.s_id[2];
1270 s_id[1] = abts->fcp_hdr_le.s_id[1];
1271 s_id[2] = abts->fcp_hdr_le.s_id[0];
1272
1273 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1274 if (!sess) {
1275 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1276 "qla_target(%d): task abort for non-existant session\n",
1277 vha->vp_idx);
1278 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1279 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1280 if (rc != 0) {
1281 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1282 false);
1283 }
1284 return;
1285 }
1286
1287 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1288 if (rc != 0) {
1289 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1290 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1291 vha->vp_idx, rc);
1292 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1293 return;
1294 }
1295 }
1296
1297 /*
1298 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1299 */
1300 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1301 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1302 {
1303 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1304 struct ctio7_to_24xx *ctio;
1305 uint16_t temp;
1306
1307 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1308 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1309 ha, atio, resp_code);
1310
1311 /* Send marker if required */
1312 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1313 return;
1314
1315 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1316 if (ctio == NULL) {
1317 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1318 "qla_target(%d): %s failed: unable to allocate "
1319 "request packet\n", ha->vp_idx, __func__);
1320 return;
1321 }
1322
1323 ctio->entry_type = CTIO_TYPE7;
1324 ctio->entry_count = 1;
1325 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1326 ctio->nport_handle = mcmd->sess->loop_id;
1327 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1328 ctio->vp_index = ha->vp_idx;
1329 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1330 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1331 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1332 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1333 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1334 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1335 CTIO7_FLAGS_SEND_STATUS);
1336 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1337 ctio->u.status1.ox_id = cpu_to_le16(temp);
1338 ctio->u.status1.scsi_status =
1339 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1340 ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1341 ctio->u.status1.sense_data[0] = resp_code;
1342
1343 /* Memory Barrier */
1344 wmb();
1345 qla2x00_start_iocbs(ha, ha->req);
1346 }
1347
1348 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1349 {
1350 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1351 }
1352 EXPORT_SYMBOL(qlt_free_mcmd);
1353
1354 /* callback from target fabric module code */
1355 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1356 {
1357 struct scsi_qla_host *vha = mcmd->sess->vha;
1358 struct qla_hw_data *ha = vha->hw;
1359 unsigned long flags;
1360
1361 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1362 "TM response mcmd (%p) status %#x state %#x",
1363 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1364
1365 spin_lock_irqsave(&ha->hardware_lock, flags);
1366
1367 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1368 /*
1369 * Either a chip reset is active or this request was from
1370 * previous life, just abort the processing.
1371 */
1372 ql_dbg(ql_dbg_async, vha, 0xe100,
1373 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1374 qla2x00_reset_active(vha), mcmd->reset_count,
1375 ha->chip_reset);
1376 ha->tgt.tgt_ops->free_mcmd(mcmd);
1377 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1378 return;
1379 }
1380
1381 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1382 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1383 0, 0, 0, 0, 0, 0);
1384 else {
1385 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1386 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1387 mcmd->fc_tm_rsp, false);
1388 else
1389 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1390 mcmd->fc_tm_rsp);
1391 }
1392 /*
1393 * Make the callback for ->free_mcmd() to queue_work() and invoke
1394 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1395 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1396 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1397 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1398 * qlt_xmit_tm_rsp() returns here..
1399 */
1400 ha->tgt.tgt_ops->free_mcmd(mcmd);
1401 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1402 }
1403 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1404
1405 /* No locks */
1406 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1407 {
1408 struct qla_tgt_cmd *cmd = prm->cmd;
1409
1410 BUG_ON(cmd->sg_cnt == 0);
1411
1412 prm->sg = (struct scatterlist *)cmd->sg;
1413 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1414 cmd->sg_cnt, cmd->dma_data_direction);
1415 if (unlikely(prm->seg_cnt == 0))
1416 goto out_err;
1417
1418 prm->cmd->sg_mapped = 1;
1419
1420 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1421 /*
1422 * If greater than four sg entries then we need to allocate
1423 * the continuation entries
1424 */
1425 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1426 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1427 prm->tgt->datasegs_per_cmd,
1428 prm->tgt->datasegs_per_cont);
1429 } else {
1430 /* DIF */
1431 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1432 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1433 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1434 prm->tot_dsds = prm->seg_cnt;
1435 } else
1436 prm->tot_dsds = prm->seg_cnt;
1437
1438 if (cmd->prot_sg_cnt) {
1439 prm->prot_sg = cmd->prot_sg;
1440 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1441 cmd->prot_sg, cmd->prot_sg_cnt,
1442 cmd->dma_data_direction);
1443 if (unlikely(prm->prot_seg_cnt == 0))
1444 goto out_err;
1445
1446 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1447 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1448 /* Dif Bundling not support here */
1449 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1450 cmd->blk_sz);
1451 prm->tot_dsds += prm->prot_seg_cnt;
1452 } else
1453 prm->tot_dsds += prm->prot_seg_cnt;
1454 }
1455 }
1456
1457 return 0;
1458
1459 out_err:
1460 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1461 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1462 0, prm->cmd->sg_cnt);
1463 return -1;
1464 }
1465
1466 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1467 {
1468 struct qla_hw_data *ha = vha->hw;
1469
1470 if (!cmd->sg_mapped)
1471 return;
1472
1473 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1474 cmd->sg_mapped = 0;
1475
1476 if (cmd->prot_sg_cnt)
1477 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1478 cmd->dma_data_direction);
1479
1480 if (cmd->ctx_dsd_alloced)
1481 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1482
1483 if (cmd->ctx)
1484 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1485 }
1486
1487 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1488 uint32_t req_cnt)
1489 {
1490 uint32_t cnt, cnt_in;
1491
1492 if (vha->req->cnt < (req_cnt + 2)) {
1493 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1494 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1495
1496 if (vha->req->ring_index < cnt)
1497 vha->req->cnt = cnt - vha->req->ring_index;
1498 else
1499 vha->req->cnt = vha->req->length -
1500 (vha->req->ring_index - cnt);
1501 }
1502
1503 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1504 ql_dbg(ql_dbg_io, vha, 0x305a,
1505 "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1506 vha->vp_idx, vha->req->ring_index,
1507 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1508 return -EAGAIN;
1509 }
1510 vha->req->cnt -= req_cnt;
1511
1512 return 0;
1513 }
1514
1515 /*
1516 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1517 */
1518 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1519 {
1520 /* Adjust ring index. */
1521 vha->req->ring_index++;
1522 if (vha->req->ring_index == vha->req->length) {
1523 vha->req->ring_index = 0;
1524 vha->req->ring_ptr = vha->req->ring;
1525 } else {
1526 vha->req->ring_ptr++;
1527 }
1528 return (cont_entry_t *)vha->req->ring_ptr;
1529 }
1530
1531 /* ha->hardware_lock supposed to be held on entry */
1532 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1533 {
1534 struct qla_hw_data *ha = vha->hw;
1535 uint32_t h;
1536
1537 h = ha->tgt.current_handle;
1538 /* always increment cmd handle */
1539 do {
1540 ++h;
1541 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1542 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1543 if (h == ha->tgt.current_handle) {
1544 ql_dbg(ql_dbg_io, vha, 0x305b,
1545 "qla_target(%d): Ran out of "
1546 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1547 h = QLA_TGT_NULL_HANDLE;
1548 break;
1549 }
1550 } while ((h == QLA_TGT_NULL_HANDLE) ||
1551 (h == QLA_TGT_SKIP_HANDLE) ||
1552 (ha->tgt.cmds[h-1] != NULL));
1553
1554 if (h != QLA_TGT_NULL_HANDLE)
1555 ha->tgt.current_handle = h;
1556
1557 return h;
1558 }
1559
1560 /* ha->hardware_lock supposed to be held on entry */
1561 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1562 struct scsi_qla_host *vha)
1563 {
1564 uint32_t h;
1565 struct ctio7_to_24xx *pkt;
1566 struct qla_hw_data *ha = vha->hw;
1567 struct atio_from_isp *atio = &prm->cmd->atio;
1568 uint16_t temp;
1569
1570 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1571 prm->pkt = pkt;
1572 memset(pkt, 0, sizeof(*pkt));
1573
1574 pkt->entry_type = CTIO_TYPE7;
1575 pkt->entry_count = (uint8_t)prm->req_cnt;
1576 pkt->vp_index = vha->vp_idx;
1577
1578 h = qlt_make_handle(vha);
1579 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1580 /*
1581 * CTIO type 7 from the firmware doesn't provide a way to
1582 * know the initiator's LOOP ID, hence we can't find
1583 * the session and, so, the command.
1584 */
1585 return -EAGAIN;
1586 } else
1587 ha->tgt.cmds[h-1] = prm->cmd;
1588
1589 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1590 pkt->nport_handle = prm->cmd->loop_id;
1591 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1592 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1593 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1594 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1595 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1596 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1597 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1598 pkt->u.status0.ox_id = cpu_to_le16(temp);
1599 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1600
1601 return 0;
1602 }
1603
1604 /*
1605 * ha->hardware_lock supposed to be held on entry. We have already made sure
1606 * that there is sufficient amount of request entries to not drop it.
1607 */
1608 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1609 struct scsi_qla_host *vha)
1610 {
1611 int cnt;
1612 uint32_t *dword_ptr;
1613 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1614
1615 /* Build continuation packets */
1616 while (prm->seg_cnt > 0) {
1617 cont_a64_entry_t *cont_pkt64 =
1618 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1619
1620 /*
1621 * Make sure that from cont_pkt64 none of
1622 * 64-bit specific fields used for 32-bit
1623 * addressing. Cast to (cont_entry_t *) for
1624 * that.
1625 */
1626
1627 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1628
1629 cont_pkt64->entry_count = 1;
1630 cont_pkt64->sys_define = 0;
1631
1632 if (enable_64bit_addressing) {
1633 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1634 dword_ptr =
1635 (uint32_t *)&cont_pkt64->dseg_0_address;
1636 } else {
1637 cont_pkt64->entry_type = CONTINUE_TYPE;
1638 dword_ptr =
1639 (uint32_t *)&((cont_entry_t *)
1640 cont_pkt64)->dseg_0_address;
1641 }
1642
1643 /* Load continuation entry data segments */
1644 for (cnt = 0;
1645 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1646 cnt++, prm->seg_cnt--) {
1647 *dword_ptr++ =
1648 cpu_to_le32(pci_dma_lo32
1649 (sg_dma_address(prm->sg)));
1650 if (enable_64bit_addressing) {
1651 *dword_ptr++ =
1652 cpu_to_le32(pci_dma_hi32
1653 (sg_dma_address
1654 (prm->sg)));
1655 }
1656 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1657
1658 prm->sg = sg_next(prm->sg);
1659 }
1660 }
1661 }
1662
1663 /*
1664 * ha->hardware_lock supposed to be held on entry. We have already made sure
1665 * that there is sufficient amount of request entries to not drop it.
1666 */
1667 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1668 struct scsi_qla_host *vha)
1669 {
1670 int cnt;
1671 uint32_t *dword_ptr;
1672 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1673 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1674
1675 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1676
1677 /* Setup packet address segment pointer */
1678 dword_ptr = pkt24->u.status0.dseg_0_address;
1679
1680 /* Set total data segment count */
1681 if (prm->seg_cnt)
1682 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1683
1684 if (prm->seg_cnt == 0) {
1685 /* No data transfer */
1686 *dword_ptr++ = 0;
1687 *dword_ptr = 0;
1688 return;
1689 }
1690
1691 /* If scatter gather */
1692
1693 /* Load command entry data segments */
1694 for (cnt = 0;
1695 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1696 cnt++, prm->seg_cnt--) {
1697 *dword_ptr++ =
1698 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1699 if (enable_64bit_addressing) {
1700 *dword_ptr++ =
1701 cpu_to_le32(pci_dma_hi32(
1702 sg_dma_address(prm->sg)));
1703 }
1704 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1705
1706 prm->sg = sg_next(prm->sg);
1707 }
1708
1709 qlt_load_cont_data_segments(prm, vha);
1710 }
1711
1712 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1713 {
1714 return cmd->bufflen > 0;
1715 }
1716
1717 /*
1718 * Called without ha->hardware_lock held
1719 */
1720 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1721 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1722 uint32_t *full_req_cnt)
1723 {
1724 struct qla_tgt *tgt = cmd->tgt;
1725 struct scsi_qla_host *vha = tgt->vha;
1726 struct qla_hw_data *ha = vha->hw;
1727 struct se_cmd *se_cmd = &cmd->se_cmd;
1728
1729 if (unlikely(cmd->aborted)) {
1730 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1731 "qla_target(%d): terminating exchange "
1732 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1733 se_cmd, cmd->tag);
1734
1735 cmd->state = QLA_TGT_STATE_ABORTED;
1736 cmd->cmd_flags |= BIT_6;
1737
1738 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1739
1740 /* !! At this point cmd could be already freed !! */
1741 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1742 }
1743
1744 prm->cmd = cmd;
1745 prm->tgt = tgt;
1746 prm->rq_result = scsi_status;
1747 prm->sense_buffer = &cmd->sense_buffer[0];
1748 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1749 prm->sg = NULL;
1750 prm->seg_cnt = -1;
1751 prm->req_cnt = 1;
1752 prm->add_status_pkt = 0;
1753
1754 /* Send marker if required */
1755 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1756 return -EFAULT;
1757
1758 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1759 if (qlt_pci_map_calc_cnt(prm) != 0)
1760 return -EAGAIN;
1761 }
1762
1763 *full_req_cnt = prm->req_cnt;
1764
1765 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1766 prm->residual = se_cmd->residual_count;
1767 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1768 "Residual underflow: %d (tag %d, "
1769 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1770 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1771 cmd->bufflen, prm->rq_result);
1772 prm->rq_result |= SS_RESIDUAL_UNDER;
1773 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1774 prm->residual = se_cmd->residual_count;
1775 ql_dbg(ql_dbg_io, vha, 0x305d,
1776 "Residual overflow: %d (tag %d, "
1777 "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1778 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1779 cmd->bufflen, prm->rq_result);
1780 prm->rq_result |= SS_RESIDUAL_OVER;
1781 }
1782
1783 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1784 /*
1785 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1786 * ignored in *xmit_response() below
1787 */
1788 if (qlt_has_data(cmd)) {
1789 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1790 (IS_FWI2_CAPABLE(ha) &&
1791 (prm->rq_result != 0))) {
1792 prm->add_status_pkt = 1;
1793 (*full_req_cnt)++;
1794 }
1795 }
1796 }
1797
1798 return 0;
1799 }
1800
1801 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1802 struct qla_tgt_cmd *cmd, int sending_sense)
1803 {
1804 if (ha->tgt.enable_class_2)
1805 return 0;
1806
1807 if (sending_sense)
1808 return cmd->conf_compl_supported;
1809 else
1810 return ha->tgt.enable_explicit_conf &&
1811 cmd->conf_compl_supported;
1812 }
1813
1814 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1815 /*
1816 * Original taken from the XFS code
1817 */
1818 static unsigned long qlt_srr_random(void)
1819 {
1820 static int Inited;
1821 static unsigned long RandomValue;
1822 static DEFINE_SPINLOCK(lock);
1823 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1824 register long rv;
1825 register long lo;
1826 register long hi;
1827 unsigned long flags;
1828
1829 spin_lock_irqsave(&lock, flags);
1830 if (!Inited) {
1831 RandomValue = jiffies;
1832 Inited = 1;
1833 }
1834 rv = RandomValue;
1835 hi = rv / 127773;
1836 lo = rv % 127773;
1837 rv = 16807 * lo - 2836 * hi;
1838 if (rv <= 0)
1839 rv += 2147483647;
1840 RandomValue = rv;
1841 spin_unlock_irqrestore(&lock, flags);
1842 return rv;
1843 }
1844
1845 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1846 {
1847 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1848 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1849 == 50) {
1850 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1851 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1852 "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1853 }
1854 #endif
1855 /*
1856 * It's currently not possible to simulate SRRs for FCP_WRITE without
1857 * a physical link layer failure, so don't even try here..
1858 */
1859 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1860 return;
1861
1862 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1863 ((qlt_srr_random() % 100) == 20)) {
1864 int i, leave = 0;
1865 unsigned int tot_len = 0;
1866
1867 while (leave == 0)
1868 leave = qlt_srr_random() % cmd->sg_cnt;
1869
1870 for (i = 0; i < leave; i++)
1871 tot_len += cmd->sg[i].length;
1872
1873 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1874 "Cutting cmd %p (tag %d) buffer"
1875 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1876 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1877 cmd->bufflen, cmd->sg_cnt);
1878
1879 cmd->bufflen = tot_len;
1880 cmd->sg_cnt = leave;
1881 }
1882
1883 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1884 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1885
1886 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1887 "Cutting cmd %p (tag %d) buffer head "
1888 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1889 cmd->bufflen);
1890 if (offset == 0)
1891 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1892 else if (qlt_set_data_offset(cmd, offset)) {
1893 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1894 "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1895 }
1896 }
1897 }
1898 #else
1899 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1900 {}
1901 #endif
1902
1903 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1904 struct qla_tgt_prm *prm)
1905 {
1906 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1907 (uint32_t)sizeof(ctio->u.status1.sense_data));
1908 ctio->u.status0.flags |=
1909 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1910 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1911 ctio->u.status0.flags |= __constant_cpu_to_le16(
1912 CTIO7_FLAGS_EXPLICIT_CONFORM |
1913 CTIO7_FLAGS_CONFORM_REQ);
1914 }
1915 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1916 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1917 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1918 int i;
1919
1920 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1921 if (prm->cmd->se_cmd.scsi_status != 0) {
1922 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1923 "Skipping EXPLICIT_CONFORM and "
1924 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1925 "non GOOD status\n");
1926 goto skip_explict_conf;
1927 }
1928 ctio->u.status1.flags |= __constant_cpu_to_le16(
1929 CTIO7_FLAGS_EXPLICIT_CONFORM |
1930 CTIO7_FLAGS_CONFORM_REQ);
1931 }
1932 skip_explict_conf:
1933 ctio->u.status1.flags &=
1934 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1935 ctio->u.status1.flags |=
1936 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1937 ctio->u.status1.scsi_status |=
1938 __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1939 ctio->u.status1.sense_length =
1940 cpu_to_le16(prm->sense_buffer_len);
1941 for (i = 0; i < prm->sense_buffer_len/4; i++)
1942 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1943 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1944 #if 0
1945 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1946 static int q;
1947 if (q < 10) {
1948 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1949 "qla_target(%d): %d bytes of sense "
1950 "lost", prm->tgt->ha->vp_idx,
1951 prm->sense_buffer_len % 4);
1952 q++;
1953 }
1954 }
1955 #endif
1956 } else {
1957 ctio->u.status1.flags &=
1958 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1959 ctio->u.status1.flags |=
1960 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1961 ctio->u.status1.sense_length = 0;
1962 memset(ctio->u.status1.sense_data, 0,
1963 sizeof(ctio->u.status1.sense_data));
1964 }
1965
1966 /* Sense with len > 24, is it possible ??? */
1967 }
1968
1969
1970
1971 /* diff */
1972 static inline int
1973 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1974 {
1975 /*
1976 * Uncomment when corresponding SCSI changes are done.
1977 *
1978 if (!sp->cmd->prot_chk)
1979 return 0;
1980 *
1981 */
1982 switch (se_cmd->prot_op) {
1983 case TARGET_PROT_DOUT_INSERT:
1984 case TARGET_PROT_DIN_STRIP:
1985 if (ql2xenablehba_err_chk >= 1)
1986 return 1;
1987 break;
1988 case TARGET_PROT_DOUT_PASS:
1989 case TARGET_PROT_DIN_PASS:
1990 if (ql2xenablehba_err_chk >= 2)
1991 return 1;
1992 break;
1993 case TARGET_PROT_DIN_INSERT:
1994 case TARGET_PROT_DOUT_STRIP:
1995 return 1;
1996 default:
1997 break;
1998 }
1999 return 0;
2000 }
2001
2002 /*
2003 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2004 *
2005 */
2006 static inline void
2007 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2008 {
2009 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2010
2011 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2012 * have been immplemented by TCM, before AppTag is avail.
2013 * Look for modesense_handlers[]
2014 */
2015 ctx->app_tag = 0;
2016 ctx->app_tag_mask[0] = 0x0;
2017 ctx->app_tag_mask[1] = 0x0;
2018
2019 switch (se_cmd->prot_type) {
2020 case TARGET_DIF_TYPE0_PROT:
2021 /*
2022 * No check for ql2xenablehba_err_chk, as it would be an
2023 * I/O error if hba tag generation is not done.
2024 */
2025 ctx->ref_tag = cpu_to_le32(lba);
2026
2027 if (!qlt_hba_err_chk_enabled(se_cmd))
2028 break;
2029
2030 /* enable ALL bytes of the ref tag */
2031 ctx->ref_tag_mask[0] = 0xff;
2032 ctx->ref_tag_mask[1] = 0xff;
2033 ctx->ref_tag_mask[2] = 0xff;
2034 ctx->ref_tag_mask[3] = 0xff;
2035 break;
2036 /*
2037 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2038 * 16 bit app tag.
2039 */
2040 case TARGET_DIF_TYPE1_PROT:
2041 ctx->ref_tag = cpu_to_le32(lba);
2042
2043 if (!qlt_hba_err_chk_enabled(se_cmd))
2044 break;
2045
2046 /* enable ALL bytes of the ref tag */
2047 ctx->ref_tag_mask[0] = 0xff;
2048 ctx->ref_tag_mask[1] = 0xff;
2049 ctx->ref_tag_mask[2] = 0xff;
2050 ctx->ref_tag_mask[3] = 0xff;
2051 break;
2052 /*
2053 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2054 * match LBA in CDB + N
2055 */
2056 case TARGET_DIF_TYPE2_PROT:
2057 ctx->ref_tag = cpu_to_le32(lba);
2058
2059 if (!qlt_hba_err_chk_enabled(se_cmd))
2060 break;
2061
2062 /* enable ALL bytes of the ref tag */
2063 ctx->ref_tag_mask[0] = 0xff;
2064 ctx->ref_tag_mask[1] = 0xff;
2065 ctx->ref_tag_mask[2] = 0xff;
2066 ctx->ref_tag_mask[3] = 0xff;
2067 break;
2068
2069 /* For Type 3 protection: 16 bit GUARD only */
2070 case TARGET_DIF_TYPE3_PROT:
2071 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2072 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2073 break;
2074 }
2075 }
2076
2077
2078 static inline int
2079 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2080 {
2081 uint32_t *cur_dsd;
2082 int sgc;
2083 uint32_t transfer_length = 0;
2084 uint32_t data_bytes;
2085 uint32_t dif_bytes;
2086 uint8_t bundling = 1;
2087 uint8_t *clr_ptr;
2088 struct crc_context *crc_ctx_pkt = NULL;
2089 struct qla_hw_data *ha;
2090 struct ctio_crc2_to_fw *pkt;
2091 dma_addr_t crc_ctx_dma;
2092 uint16_t fw_prot_opts = 0;
2093 struct qla_tgt_cmd *cmd = prm->cmd;
2094 struct se_cmd *se_cmd = &cmd->se_cmd;
2095 uint32_t h;
2096 struct atio_from_isp *atio = &prm->cmd->atio;
2097 uint16_t t16;
2098
2099 sgc = 0;
2100 ha = vha->hw;
2101
2102 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2103 prm->pkt = pkt;
2104 memset(pkt, 0, sizeof(*pkt));
2105
2106 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2107 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2108 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2109 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2110
2111 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2112 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2113 bundling = 0;
2114
2115 /* Compute dif len and adjust data len to incude protection */
2116 data_bytes = cmd->bufflen;
2117 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2118
2119 switch (se_cmd->prot_op) {
2120 case TARGET_PROT_DIN_INSERT:
2121 case TARGET_PROT_DOUT_STRIP:
2122 transfer_length = data_bytes;
2123 data_bytes += dif_bytes;
2124 break;
2125
2126 case TARGET_PROT_DIN_STRIP:
2127 case TARGET_PROT_DOUT_INSERT:
2128 case TARGET_PROT_DIN_PASS:
2129 case TARGET_PROT_DOUT_PASS:
2130 transfer_length = data_bytes + dif_bytes;
2131 break;
2132
2133 default:
2134 BUG();
2135 break;
2136 }
2137
2138 if (!qlt_hba_err_chk_enabled(se_cmd))
2139 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2140 /* HBA error checking enabled */
2141 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2142 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2143 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2144 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2145 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2146 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2147 }
2148
2149 switch (se_cmd->prot_op) {
2150 case TARGET_PROT_DIN_INSERT:
2151 case TARGET_PROT_DOUT_INSERT:
2152 fw_prot_opts |= PO_MODE_DIF_INSERT;
2153 break;
2154 case TARGET_PROT_DIN_STRIP:
2155 case TARGET_PROT_DOUT_STRIP:
2156 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2157 break;
2158 case TARGET_PROT_DIN_PASS:
2159 case TARGET_PROT_DOUT_PASS:
2160 fw_prot_opts |= PO_MODE_DIF_PASS;
2161 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2162 break;
2163 default:/* Normal Request */
2164 fw_prot_opts |= PO_MODE_DIF_PASS;
2165 break;
2166 }
2167
2168
2169 /* ---- PKT ---- */
2170 /* Update entry type to indicate Command Type CRC_2 IOCB */
2171 pkt->entry_type = CTIO_CRC2;
2172 pkt->entry_count = 1;
2173 pkt->vp_index = vha->vp_idx;
2174
2175 h = qlt_make_handle(vha);
2176 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2177 /*
2178 * CTIO type 7 from the firmware doesn't provide a way to
2179 * know the initiator's LOOP ID, hence we can't find
2180 * the session and, so, the command.
2181 */
2182 return -EAGAIN;
2183 } else
2184 ha->tgt.cmds[h-1] = prm->cmd;
2185
2186
2187 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2188 pkt->nport_handle = prm->cmd->loop_id;
2189 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2190 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2191 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2192 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2193 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2194
2195 /* silence compile warning */
2196 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2197 pkt->ox_id = cpu_to_le16(t16);
2198
2199 t16 = (atio->u.isp24.attr << 9);
2200 pkt->flags |= cpu_to_le16(t16);
2201 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2202
2203 /* Set transfer direction */
2204 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2205 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2206 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2207 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2208
2209
2210 pkt->dseg_count = prm->tot_dsds;
2211 /* Fibre channel byte count */
2212 pkt->transfer_length = cpu_to_le32(transfer_length);
2213
2214
2215 /* ----- CRC context -------- */
2216
2217 /* Allocate CRC context from global pool */
2218 crc_ctx_pkt = cmd->ctx =
2219 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2220
2221 if (!crc_ctx_pkt)
2222 goto crc_queuing_error;
2223
2224 /* Zero out CTX area. */
2225 clr_ptr = (uint8_t *)crc_ctx_pkt;
2226 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2227
2228 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2229 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2230
2231 /* Set handle */
2232 crc_ctx_pkt->handle = pkt->handle;
2233
2234 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2235
2236 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2237 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2238 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2239
2240
2241 if (!bundling) {
2242 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2243 } else {
2244 /*
2245 * Configure Bundling if we need to fetch interlaving
2246 * protection PCI accesses
2247 */
2248 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2249 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2250 crc_ctx_pkt->u.bundling.dseg_count =
2251 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2252 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2253 }
2254
2255 /* Finish the common fields of CRC pkt */
2256 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2257 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2258 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2259 crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2260
2261
2262 /* Walks data segments */
2263 pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2264
2265 if (!bundling && prm->prot_seg_cnt) {
2266 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2267 prm->tot_dsds, cmd))
2268 goto crc_queuing_error;
2269 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2270 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2271 goto crc_queuing_error;
2272
2273 if (bundling && prm->prot_seg_cnt) {
2274 /* Walks dif segments */
2275 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2276
2277 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2278 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2279 prm->prot_seg_cnt, cmd))
2280 goto crc_queuing_error;
2281 }
2282 return QLA_SUCCESS;
2283
2284 crc_queuing_error:
2285 /* Cleanup will be performed by the caller */
2286
2287 return QLA_FUNCTION_FAILED;
2288 }
2289
2290
2291 /*
2292 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2293 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2294 */
2295 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2296 uint8_t scsi_status)
2297 {
2298 struct scsi_qla_host *vha = cmd->vha;
2299 struct qla_hw_data *ha = vha->hw;
2300 struct ctio7_to_24xx *pkt;
2301 struct qla_tgt_prm prm;
2302 uint32_t full_req_cnt = 0;
2303 unsigned long flags = 0;
2304 int res;
2305
2306 memset(&prm, 0, sizeof(prm));
2307 qlt_check_srr_debug(cmd, &xmit_type);
2308
2309 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2310 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2311 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2312 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2313 &cmd->se_cmd);
2314
2315 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2316 &full_req_cnt);
2317 if (unlikely(res != 0)) {
2318 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2319 return 0;
2320
2321 return res;
2322 }
2323
2324 spin_lock_irqsave(&ha->hardware_lock, flags);
2325
2326 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2327 /*
2328 * Either a chip reset is active or this request was from
2329 * previous life, just abort the processing.
2330 */
2331 cmd->state = QLA_TGT_STATE_PROCESSED;
2332 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2333 ql_dbg(ql_dbg_async, vha, 0xe101,
2334 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2335 qla2x00_reset_active(vha), cmd->reset_count,
2336 ha->chip_reset);
2337 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2338 return 0;
2339 }
2340
2341 /* Does F/W have an IOCBs for this request */
2342 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2343 if (unlikely(res))
2344 goto out_unmap_unlock;
2345
2346 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2347 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2348 else
2349 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2350 if (unlikely(res != 0))
2351 goto out_unmap_unlock;
2352
2353
2354 pkt = (struct ctio7_to_24xx *)prm.pkt;
2355
2356 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2357 pkt->u.status0.flags |=
2358 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2359 CTIO7_FLAGS_STATUS_MODE_0);
2360
2361 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2362 qlt_load_data_segments(&prm, vha);
2363
2364 if (prm.add_status_pkt == 0) {
2365 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2366 pkt->u.status0.scsi_status =
2367 cpu_to_le16(prm.rq_result);
2368 pkt->u.status0.residual =
2369 cpu_to_le32(prm.residual);
2370 pkt->u.status0.flags |= __constant_cpu_to_le16(
2371 CTIO7_FLAGS_SEND_STATUS);
2372 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2373 pkt->u.status0.flags |=
2374 __constant_cpu_to_le16(
2375 CTIO7_FLAGS_EXPLICIT_CONFORM |
2376 CTIO7_FLAGS_CONFORM_REQ);
2377 }
2378 }
2379
2380 } else {
2381 /*
2382 * We have already made sure that there is sufficient
2383 * amount of request entries to not drop HW lock in
2384 * req_pkt().
2385 */
2386 struct ctio7_to_24xx *ctio =
2387 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2388
2389 ql_dbg(ql_dbg_io, vha, 0x305e,
2390 "Building additional status packet 0x%p.\n",
2391 ctio);
2392
2393 /*
2394 * T10Dif: ctio_crc2_to_fw overlay ontop of
2395 * ctio7_to_24xx
2396 */
2397 memcpy(ctio, pkt, sizeof(*ctio));
2398 /* reset back to CTIO7 */
2399 ctio->entry_count = 1;
2400 ctio->entry_type = CTIO_TYPE7;
2401 ctio->dseg_count = 0;
2402 ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2403 CTIO7_FLAGS_DATA_IN);
2404
2405 /* Real finish is ctio_m1's finish */
2406 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2407 pkt->u.status0.flags |= __constant_cpu_to_le16(
2408 CTIO7_FLAGS_DONT_RET_CTIO);
2409
2410 /* qlt_24xx_init_ctio_to_isp will correct
2411 * all neccessary fields that's part of CTIO7.
2412 * There should be no residual of CTIO-CRC2 data.
2413 */
2414 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2415 &prm);
2416 pr_debug("Status CTIO7: %p\n", ctio);
2417 }
2418 } else
2419 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2420
2421
2422 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2423 cmd->cmd_sent_to_fw = 1;
2424
2425 /* Memory Barrier */
2426 wmb();
2427 qla2x00_start_iocbs(vha, vha->req);
2428 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2429
2430 return 0;
2431
2432 out_unmap_unlock:
2433 qlt_unmap_sg(vha, cmd);
2434 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2435
2436 return res;
2437 }
2438 EXPORT_SYMBOL(qlt_xmit_response);
2439
2440 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2441 {
2442 struct ctio7_to_24xx *pkt;
2443 struct scsi_qla_host *vha = cmd->vha;
2444 struct qla_hw_data *ha = vha->hw;
2445 struct qla_tgt *tgt = cmd->tgt;
2446 struct qla_tgt_prm prm;
2447 unsigned long flags;
2448 int res = 0;
2449
2450 memset(&prm, 0, sizeof(prm));
2451 prm.cmd = cmd;
2452 prm.tgt = tgt;
2453 prm.sg = NULL;
2454 prm.req_cnt = 1;
2455
2456 /* Send marker if required */
2457 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2458 return -EIO;
2459
2460 /* Calculate number of entries and segments required */
2461 if (qlt_pci_map_calc_cnt(&prm) != 0)
2462 return -EAGAIN;
2463
2464 spin_lock_irqsave(&ha->hardware_lock, flags);
2465
2466 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2467 /*
2468 * Either a chip reset is active or this request was from
2469 * previous life, just abort the processing.
2470 */
2471 cmd->state = QLA_TGT_STATE_NEED_DATA;
2472 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2473 ql_dbg(ql_dbg_async, vha, 0xe102,
2474 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2475 qla2x00_reset_active(vha), cmd->reset_count,
2476 ha->chip_reset);
2477 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2478 return 0;
2479 }
2480
2481 /* Does F/W have an IOCBs for this request */
2482 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2483 if (res != 0)
2484 goto out_unlock_free_unmap;
2485 if (cmd->se_cmd.prot_op)
2486 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2487 else
2488 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2489
2490 if (unlikely(res != 0))
2491 goto out_unlock_free_unmap;
2492 pkt = (struct ctio7_to_24xx *)prm.pkt;
2493 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2494 CTIO7_FLAGS_STATUS_MODE_0);
2495
2496 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2497 qlt_load_data_segments(&prm, vha);
2498
2499 cmd->state = QLA_TGT_STATE_NEED_DATA;
2500 cmd->cmd_sent_to_fw = 1;
2501
2502 /* Memory Barrier */
2503 wmb();
2504 qla2x00_start_iocbs(vha, vha->req);
2505 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2506
2507 return res;
2508
2509 out_unlock_free_unmap:
2510 qlt_unmap_sg(vha, cmd);
2511 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2512
2513 return res;
2514 }
2515 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2516
2517
2518 /*
2519 * Checks the guard or meta-data for the type of error
2520 * detected by the HBA.
2521 */
2522 static inline int
2523 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2524 struct ctio_crc_from_fw *sts)
2525 {
2526 uint8_t *ap = &sts->actual_dif[0];
2527 uint8_t *ep = &sts->expected_dif[0];
2528 uint32_t e_ref_tag, a_ref_tag;
2529 uint16_t e_app_tag, a_app_tag;
2530 uint16_t e_guard, a_guard;
2531 uint64_t lba = cmd->se_cmd.t_task_lba;
2532
2533 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2534 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2535 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2536
2537 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2538 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2539 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2540
2541 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2542 "iocb(s) %p Returned STATUS.\n", sts);
2543
2544 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2545 "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2546 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2547 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2548
2549 /*
2550 * Ignore sector if:
2551 * For type 3: ref & app tag is all 'f's
2552 * For type 0,1,2: app tag is all 'f's
2553 */
2554 if ((a_app_tag == 0xffff) &&
2555 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2556 (a_ref_tag == 0xffffffff))) {
2557 uint32_t blocks_done;
2558
2559 /* 2TB boundary case covered automatically with this */
2560 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2561 cmd->se_cmd.bad_sector = e_ref_tag;
2562 cmd->se_cmd.pi_err = 0;
2563 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2564 "need to return scsi good\n");
2565
2566 /* Update protection tag */
2567 if (cmd->prot_sg_cnt) {
2568 uint32_t i, j = 0, k = 0, num_ent;
2569 struct scatterlist *sg, *sgl;
2570
2571
2572 sgl = cmd->prot_sg;
2573
2574 /* Patch the corresponding protection tags */
2575 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2576 num_ent = sg_dma_len(sg) / 8;
2577 if (k + num_ent < blocks_done) {
2578 k += num_ent;
2579 continue;
2580 }
2581 j = blocks_done - k - 1;
2582 k = blocks_done;
2583 break;
2584 }
2585
2586 if (k != blocks_done) {
2587 ql_log(ql_log_warn, vha, 0xf076,
2588 "unexpected tag values tag:lba=%u:%llu)\n",
2589 e_ref_tag, (unsigned long long)lba);
2590 goto out;
2591 }
2592
2593 #if 0
2594 struct sd_dif_tuple *spt;
2595 /* TODO:
2596 * This section came from initiator. Is it valid here?
2597 * should ulp be override with actual val???
2598 */
2599 spt = page_address(sg_page(sg)) + sg->offset;
2600 spt += j;
2601
2602 spt->app_tag = 0xffff;
2603 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2604 spt->ref_tag = 0xffffffff;
2605 #endif
2606 }
2607
2608 return 0;
2609 }
2610
2611 /* check guard */
2612 if (e_guard != a_guard) {
2613 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2614 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2615
2616 ql_log(ql_log_warn, vha, 0xe076,
2617 "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2618 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2619 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2620 a_guard, e_guard, cmd);
2621 goto out;
2622 }
2623
2624 /* check ref tag */
2625 if (e_ref_tag != a_ref_tag) {
2626 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2627 cmd->se_cmd.bad_sector = e_ref_tag;
2628
2629 ql_log(ql_log_warn, vha, 0xe077,
2630 "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2631 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2632 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2633 a_guard, e_guard, cmd);
2634 goto out;
2635 }
2636
2637 /* check appl tag */
2638 if (e_app_tag != a_app_tag) {
2639 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2640 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2641
2642 ql_log(ql_log_warn, vha, 0xe078,
2643 "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2644 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2645 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2646 a_guard, e_guard, cmd);
2647 goto out;
2648 }
2649 out:
2650 return 1;
2651 }
2652
2653
2654 /* If hardware_lock held on entry, might drop it, then reaquire */
2655 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2656 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2657 struct qla_tgt_cmd *cmd,
2658 struct atio_from_isp *atio)
2659 {
2660 struct ctio7_to_24xx *ctio24;
2661 struct qla_hw_data *ha = vha->hw;
2662 request_t *pkt;
2663 int ret = 0;
2664 uint16_t temp;
2665
2666 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2667
2668 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2669 if (pkt == NULL) {
2670 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2671 "qla_target(%d): %s failed: unable to allocate "
2672 "request packet\n", vha->vp_idx, __func__);
2673 return -ENOMEM;
2674 }
2675
2676 if (cmd != NULL) {
2677 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2678 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2679 "qla_target(%d): Terminating cmd %p with "
2680 "incorrect state %d\n", vha->vp_idx, cmd,
2681 cmd->state);
2682 } else
2683 ret = 1;
2684 }
2685
2686 pkt->entry_count = 1;
2687 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2688
2689 ctio24 = (struct ctio7_to_24xx *)pkt;
2690 ctio24->entry_type = CTIO_TYPE7;
2691 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2692 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2693 ctio24->vp_index = vha->vp_idx;
2694 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2695 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2696 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2697 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2698 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2699 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2700 CTIO7_FLAGS_TERMINATE);
2701 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2702 ctio24->u.status1.ox_id = cpu_to_le16(temp);
2703
2704 /* Most likely, it isn't needed */
2705 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2706 &atio->u.isp24.fcp_cmnd.add_cdb[
2707 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2708 if (ctio24->u.status1.residual != 0)
2709 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2710
2711 /* Memory Barrier */
2712 wmb();
2713 qla2x00_start_iocbs(vha, vha->req);
2714 return ret;
2715 }
2716
2717 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2718 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2719 {
2720 unsigned long flags;
2721 int rc;
2722
2723 if (qlt_issue_marker(vha, ha_locked) < 0)
2724 return;
2725
2726 if (ha_locked) {
2727 rc = __qlt_send_term_exchange(vha, cmd, atio);
2728 if (rc == -ENOMEM)
2729 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2730 goto done;
2731 }
2732 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2733 rc = __qlt_send_term_exchange(vha, cmd, atio);
2734 if (rc == -ENOMEM)
2735 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2736 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2737
2738 done:
2739 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2740 !cmd->cmd_sent_to_fw)) {
2741 if (!ha_locked && !in_interrupt())
2742 msleep(250); /* just in case */
2743
2744 qlt_unmap_sg(vha, cmd);
2745 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2746 }
2747 return;
2748 }
2749
2750 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2751 {
2752 struct list_head free_list;
2753 struct qla_tgt_cmd *cmd, *tcmd;
2754
2755 vha->hw->tgt.leak_exchg_thresh_hold =
2756 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2757
2758 cmd = tcmd = NULL;
2759 if (!list_empty(&vha->hw->tgt.q_full_list)) {
2760 INIT_LIST_HEAD(&free_list);
2761 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2762
2763 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2764 list_del(&cmd->cmd_list);
2765 /* This cmd was never sent to TCM. There is no need
2766 * to schedule free or call free_cmd
2767 */
2768 qlt_free_cmd(cmd);
2769 vha->hw->tgt.num_qfull_cmds_alloc--;
2770 }
2771 }
2772 vha->hw->tgt.num_qfull_cmds_dropped = 0;
2773 }
2774
2775 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2776 {
2777 uint32_t total_leaked;
2778
2779 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2780
2781 if (vha->hw->tgt.leak_exchg_thresh_hold &&
2782 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2783
2784 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2785 "Chip reset due to exchange starvation: %d/%d.\n",
2786 total_leaked, vha->hw->fw_xcb_count);
2787
2788 if (IS_P3P_TYPE(vha->hw))
2789 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2790 else
2791 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2792 qla2xxx_wake_dpc(vha);
2793 }
2794
2795 }
2796
2797 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2798 {
2799 struct qla_tgt_sess *sess = cmd->sess;
2800
2801 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2802 "%s: se_cmd[%p] ox_id %04x\n",
2803 __func__, &cmd->se_cmd,
2804 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2805
2806 BUG_ON(cmd->cmd_in_wq);
2807
2808 if (!cmd->q_full)
2809 qlt_decr_num_pend_cmds(cmd->vha);
2810
2811 BUG_ON(cmd->sg_mapped);
2812 cmd->jiffies_at_free = get_jiffies_64();
2813 if (unlikely(cmd->free_sg))
2814 kfree(cmd->sg);
2815
2816 if (!sess || !sess->se_sess) {
2817 WARN_ON(1);
2818 return;
2819 }
2820 cmd->jiffies_at_free = get_jiffies_64();
2821 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2822 }
2823 EXPORT_SYMBOL(qlt_free_cmd);
2824
2825 /* ha->hardware_lock supposed to be held on entry */
2826 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2827 struct qla_tgt_cmd *cmd, void *ctio)
2828 {
2829 struct qla_tgt_srr_ctio *sc;
2830 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2831 struct qla_tgt_srr_imm *imm;
2832
2833 tgt->ctio_srr_id++;
2834 cmd->cmd_flags |= BIT_15;
2835
2836 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2837 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2838
2839 if (!ctio) {
2840 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2841 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2842 vha->vp_idx);
2843 return -EINVAL;
2844 }
2845
2846 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2847 if (sc != NULL) {
2848 sc->cmd = cmd;
2849 /* IRQ is already OFF */
2850 spin_lock(&tgt->srr_lock);
2851 sc->srr_id = tgt->ctio_srr_id;
2852 list_add_tail(&sc->srr_list_entry,
2853 &tgt->srr_ctio_list);
2854 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2855 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2856 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2857 int found = 0;
2858 list_for_each_entry(imm, &tgt->srr_imm_list,
2859 srr_list_entry) {
2860 if (imm->srr_id == sc->srr_id) {
2861 found = 1;
2862 break;
2863 }
2864 }
2865 if (found) {
2866 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2867 "Scheduling srr work\n");
2868 schedule_work(&tgt->srr_work);
2869 } else {
2870 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2871 "qla_target(%d): imm_srr_id "
2872 "== ctio_srr_id (%d), but there is no "
2873 "corresponding SRR IMM, deleting CTIO "
2874 "SRR %p\n", vha->vp_idx,
2875 tgt->ctio_srr_id, sc);
2876 list_del(&sc->srr_list_entry);
2877 spin_unlock(&tgt->srr_lock);
2878
2879 kfree(sc);
2880 return -EINVAL;
2881 }
2882 }
2883 spin_unlock(&tgt->srr_lock);
2884 } else {
2885 struct qla_tgt_srr_imm *ti;
2886
2887 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2888 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2889 vha->vp_idx);
2890 spin_lock(&tgt->srr_lock);
2891 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2892 srr_list_entry) {
2893 if (imm->srr_id == tgt->ctio_srr_id) {
2894 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2895 "IMM SRR %p deleted (id %d)\n",
2896 imm, imm->srr_id);
2897 list_del(&imm->srr_list_entry);
2898 qlt_reject_free_srr_imm(vha, imm, 1);
2899 }
2900 }
2901 spin_unlock(&tgt->srr_lock);
2902
2903 return -ENOMEM;
2904 }
2905
2906 return 0;
2907 }
2908
2909 /*
2910 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2911 */
2912 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2913 struct qla_tgt_cmd *cmd, uint32_t status)
2914 {
2915 int term = 0;
2916
2917 if (ctio != NULL) {
2918 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2919 term = !(c->flags &
2920 __constant_cpu_to_le16(OF_TERM_EXCH));
2921 } else
2922 term = 1;
2923
2924 if (term)
2925 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2926
2927 return term;
2928 }
2929
2930 /* ha->hardware_lock supposed to be held on entry */
2931 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2932 uint32_t handle)
2933 {
2934 struct qla_hw_data *ha = vha->hw;
2935
2936 handle--;
2937 if (ha->tgt.cmds[handle] != NULL) {
2938 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2939 ha->tgt.cmds[handle] = NULL;
2940 return cmd;
2941 } else
2942 return NULL;
2943 }
2944
2945 /* ha->hardware_lock supposed to be held on entry */
2946 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2947 uint32_t handle, void *ctio)
2948 {
2949 struct qla_tgt_cmd *cmd = NULL;
2950
2951 /* Clear out internal marks */
2952 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2953 CTIO_INTERMEDIATE_HANDLE_MARK);
2954
2955 if (handle != QLA_TGT_NULL_HANDLE) {
2956 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2957 return NULL;
2958
2959 /* handle-1 is actually used */
2960 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2961 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2962 "qla_target(%d): Wrong handle %x received\n",
2963 vha->vp_idx, handle);
2964 return NULL;
2965 }
2966 cmd = qlt_get_cmd(vha, handle);
2967 if (unlikely(cmd == NULL)) {
2968 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2969 "qla_target(%d): Suspicious: unable to "
2970 "find the command with handle %x\n", vha->vp_idx,
2971 handle);
2972 return NULL;
2973 }
2974 } else if (ctio != NULL) {
2975 /* We can't get loop ID from CTIO7 */
2976 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2977 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2978 "support NULL handles\n", vha->vp_idx);
2979 return NULL;
2980 }
2981
2982 return cmd;
2983 }
2984
2985 /* hardware_lock should be held by caller. */
2986 static void
2987 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2988 {
2989 struct qla_hw_data *ha = vha->hw;
2990 uint32_t handle;
2991
2992 if (cmd->sg_mapped)
2993 qlt_unmap_sg(vha, cmd);
2994
2995 handle = qlt_make_handle(vha);
2996
2997 /* TODO: fix debug message type and ids. */
2998 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2999 ql_dbg(ql_dbg_io, vha, 0xff00,
3000 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3001 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3002 cmd->write_data_transferred = 0;
3003 cmd->state = QLA_TGT_STATE_DATA_IN;
3004
3005 ql_dbg(ql_dbg_io, vha, 0xff01,
3006 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3007
3008 ha->tgt.tgt_ops->handle_data(cmd);
3009 return;
3010 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3011 ql_dbg(ql_dbg_io, vha, 0xff02,
3012 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3013 } else {
3014 ql_dbg(ql_dbg_io, vha, 0xff03,
3015 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3016 cmd->state);
3017 dump_stack();
3018 }
3019
3020 cmd->cmd_flags |= BIT_12;
3021 ha->tgt.tgt_ops->free_cmd(cmd);
3022 }
3023
3024 void
3025 qlt_host_reset_handler(struct qla_hw_data *ha)
3026 {
3027 struct qla_tgt_cmd *cmd;
3028 unsigned long flags;
3029 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3030 scsi_qla_host_t *vha = NULL;
3031 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3032 uint32_t i;
3033
3034 if (!base_vha->hw->tgt.tgt_ops)
3035 return;
3036
3037 if (!tgt || qla_ini_mode_enabled(base_vha)) {
3038 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3039 "Target mode disabled\n");
3040 return;
3041 }
3042
3043 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3044 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3045 base_vha->dpc_flags);
3046
3047 spin_lock_irqsave(&ha->hardware_lock, flags);
3048 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3049 cmd = qlt_get_cmd(base_vha, i);
3050 if (!cmd)
3051 continue;
3052 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3053 vha = cmd->vha;
3054 qlt_abort_cmd_on_host_reset(vha, cmd);
3055 }
3056 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3057 }
3058
3059
3060 /*
3061 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3062 */
3063 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3064 uint32_t status, void *ctio)
3065 {
3066 struct qla_hw_data *ha = vha->hw;
3067 struct se_cmd *se_cmd;
3068 const struct target_core_fabric_ops *tfo;
3069 struct qla_tgt_cmd *cmd;
3070
3071 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3072 /* That could happen only in case of an error/reset/abort */
3073 if (status != CTIO_SUCCESS) {
3074 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3075 "Intermediate CTIO received"
3076 " (status %x)\n", status);
3077 }
3078 return;
3079 }
3080
3081 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3082 if (cmd == NULL)
3083 return;
3084
3085 se_cmd = &cmd->se_cmd;
3086 tfo = se_cmd->se_tfo;
3087 cmd->cmd_sent_to_fw = 0;
3088
3089 qlt_unmap_sg(vha, cmd);
3090
3091 if (unlikely(status != CTIO_SUCCESS)) {
3092 switch (status & 0xFFFF) {
3093 case CTIO_LIP_RESET:
3094 case CTIO_TARGET_RESET:
3095 case CTIO_ABORTED:
3096 /* driver request abort via Terminate exchange */
3097 case CTIO_TIMEOUT:
3098 case CTIO_INVALID_RX_ID:
3099 /* They are OK */
3100 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3101 "qla_target(%d): CTIO with "
3102 "status %#x received, state %x, se_cmd %p, "
3103 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3104 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3105 status, cmd->state, se_cmd);
3106 break;
3107
3108 case CTIO_PORT_LOGGED_OUT:
3109 case CTIO_PORT_UNAVAILABLE:
3110 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3111 "qla_target(%d): CTIO with PORT LOGGED "
3112 "OUT (29) or PORT UNAVAILABLE (28) status %x "
3113 "received (state %x, se_cmd %p)\n", vha->vp_idx,
3114 status, cmd->state, se_cmd);
3115 break;
3116
3117 case CTIO_SRR_RECEIVED:
3118 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3119 "qla_target(%d): CTIO with SRR_RECEIVED"
3120 " status %x received (state %x, se_cmd %p)\n",
3121 vha->vp_idx, status, cmd->state, se_cmd);
3122 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3123 break;
3124 else
3125 return;
3126
3127 case CTIO_DIF_ERROR: {
3128 struct ctio_crc_from_fw *crc =
3129 (struct ctio_crc_from_fw *)ctio;
3130 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3131 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3132 vha->vp_idx, status, cmd->state, se_cmd,
3133 *((u64 *)&crc->actual_dif[0]),
3134 *((u64 *)&crc->expected_dif[0]));
3135
3136 if (qlt_handle_dif_error(vha, cmd, ctio)) {
3137 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3138 /* scsi Write/xfer rdy complete */
3139 goto skip_term;
3140 } else {
3141 /* scsi read/xmit respond complete
3142 * call handle dif to send scsi status
3143 * rather than terminate exchange.
3144 */
3145 cmd->state = QLA_TGT_STATE_PROCESSED;
3146 ha->tgt.tgt_ops->handle_dif_err(cmd);
3147 return;
3148 }
3149 } else {
3150 /* Need to generate a SCSI good completion.
3151 * because FW did not send scsi status.
3152 */
3153 status = 0;
3154 goto skip_term;
3155 }
3156 break;
3157 }
3158 default:
3159 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3160 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3161 vha->vp_idx, status, cmd->state, se_cmd);
3162 break;
3163 }
3164
3165
3166 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3167 * cmd is already aborted/terminated, we don't
3168 * need to terminate again. The exchange is already
3169 * cleaned up/freed at FW level. Just cleanup at driver
3170 * level.
3171 */
3172 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3173 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3174 cmd->cmd_flags |= BIT_13;
3175 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3176 return;
3177 }
3178 }
3179 skip_term:
3180
3181 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3182 ;
3183 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3184 int rx_status = 0;
3185
3186 cmd->state = QLA_TGT_STATE_DATA_IN;
3187
3188 if (unlikely(status != CTIO_SUCCESS))
3189 rx_status = -EIO;
3190 else
3191 cmd->write_data_transferred = 1;
3192
3193 ha->tgt.tgt_ops->handle_data(cmd);
3194 return;
3195 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3196 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3197 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
3198 } else {
3199 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3200 "qla_target(%d): A command in state (%d) should "
3201 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3202 }
3203
3204 if (unlikely(status != CTIO_SUCCESS) &&
3205 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3206 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3207 dump_stack();
3208 }
3209
3210
3211 ha->tgt.tgt_ops->free_cmd(cmd);
3212 }
3213
3214 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3215 uint8_t task_codes)
3216 {
3217 int fcp_task_attr;
3218
3219 switch (task_codes) {
3220 case ATIO_SIMPLE_QUEUE:
3221 fcp_task_attr = TCM_SIMPLE_TAG;
3222 break;
3223 case ATIO_HEAD_OF_QUEUE:
3224 fcp_task_attr = TCM_HEAD_TAG;
3225 break;
3226 case ATIO_ORDERED_QUEUE:
3227 fcp_task_attr = TCM_ORDERED_TAG;
3228 break;
3229 case ATIO_ACA_QUEUE:
3230 fcp_task_attr = TCM_ACA_TAG;
3231 break;
3232 case ATIO_UNTAGGED:
3233 fcp_task_attr = TCM_SIMPLE_TAG;
3234 break;
3235 default:
3236 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3237 "qla_target: unknown task code %x, use ORDERED instead\n",
3238 task_codes);
3239 fcp_task_attr = TCM_ORDERED_TAG;
3240 break;
3241 }
3242
3243 return fcp_task_attr;
3244 }
3245
3246 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3247 uint8_t *);
3248 /*
3249 * Process context for I/O path into tcm_qla2xxx code
3250 */
3251 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3252 {
3253 scsi_qla_host_t *vha = cmd->vha;
3254 struct qla_hw_data *ha = vha->hw;
3255 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3256 struct qla_tgt_sess *sess = cmd->sess;
3257 struct atio_from_isp *atio = &cmd->atio;
3258 unsigned char *cdb;
3259 unsigned long flags;
3260 uint32_t data_length;
3261 int ret, fcp_task_attr, data_dir, bidi = 0;
3262
3263 cmd->cmd_in_wq = 0;
3264 cmd->cmd_flags |= BIT_1;
3265 if (tgt->tgt_stop)
3266 goto out_term;
3267
3268 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3269 cmd->tag = atio->u.isp24.exchange_addr;
3270 cmd->unpacked_lun = scsilun_to_int(
3271 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3272
3273 if (atio->u.isp24.fcp_cmnd.rddata &&
3274 atio->u.isp24.fcp_cmnd.wrdata) {
3275 bidi = 1;
3276 data_dir = DMA_TO_DEVICE;
3277 } else if (atio->u.isp24.fcp_cmnd.rddata)
3278 data_dir = DMA_FROM_DEVICE;
3279 else if (atio->u.isp24.fcp_cmnd.wrdata)
3280 data_dir = DMA_TO_DEVICE;
3281 else
3282 data_dir = DMA_NONE;
3283
3284 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3285 atio->u.isp24.fcp_cmnd.task_attr);
3286 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3287 &atio->u.isp24.fcp_cmnd.add_cdb[
3288 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3289
3290 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3291 fcp_task_attr, data_dir, bidi);
3292 if (ret != 0)
3293 goto out_term;
3294 /*
3295 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3296 */
3297 spin_lock_irqsave(&ha->hardware_lock, flags);
3298 ha->tgt.tgt_ops->put_sess(sess);
3299 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3300 return;
3301
3302 out_term:
3303 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3304 /*
3305 * cmd has not sent to target yet, so pass NULL as the second
3306 * argument to qlt_send_term_exchange() and free the memory here.
3307 */
3308 cmd->cmd_flags |= BIT_2;
3309 spin_lock_irqsave(&ha->hardware_lock, flags);
3310 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3311
3312 qlt_decr_num_pend_cmds(vha);
3313 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3314 ha->tgt.tgt_ops->put_sess(sess);
3315 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3316 }
3317
3318 static void qlt_do_work(struct work_struct *work)
3319 {
3320 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3321
3322 __qlt_do_work(cmd);
3323 }
3324
3325 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3326 struct qla_tgt_sess *sess,
3327 struct atio_from_isp *atio)
3328 {
3329 struct se_session *se_sess = sess->se_sess;
3330 struct qla_tgt_cmd *cmd;
3331 int tag;
3332
3333 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3334 if (tag < 0)
3335 return NULL;
3336
3337 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3338 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3339
3340 memcpy(&cmd->atio, atio, sizeof(*atio));
3341 cmd->state = QLA_TGT_STATE_NEW;
3342 cmd->tgt = vha->vha_tgt.qla_tgt;
3343 qlt_incr_num_pend_cmds(vha);
3344 cmd->vha = vha;
3345 cmd->se_cmd.map_tag = tag;
3346 cmd->sess = sess;
3347 cmd->loop_id = sess->loop_id;
3348 cmd->conf_compl_supported = sess->conf_compl_supported;
3349
3350 return cmd;
3351 }
3352
3353 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3354 uint16_t);
3355
3356 static void qlt_create_sess_from_atio(struct work_struct *work)
3357 {
3358 struct qla_tgt_sess_op *op = container_of(work,
3359 struct qla_tgt_sess_op, work);
3360 scsi_qla_host_t *vha = op->vha;
3361 struct qla_hw_data *ha = vha->hw;
3362 struct qla_tgt_sess *sess;
3363 struct qla_tgt_cmd *cmd;
3364 unsigned long flags;
3365 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3366
3367 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3368 "qla_target(%d): Unable to find wwn login"
3369 " (s_id %x:%x:%x), trying to create it manually\n",
3370 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3371
3372 if (op->atio.u.raw.entry_count > 1) {
3373 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3374 "Dropping multy entry atio %p\n", &op->atio);
3375 goto out_term;
3376 }
3377
3378 mutex_lock(&vha->vha_tgt.tgt_mutex);
3379 sess = qlt_make_local_sess(vha, s_id);
3380 /* sess has an extra creation ref. */
3381 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3382
3383 if (!sess)
3384 goto out_term;
3385 /*
3386 * Now obtain a pre-allocated session tag using the original op->atio
3387 * packet header, and dispatch into __qlt_do_work() using the existing
3388 * process context.
3389 */
3390 cmd = qlt_get_tag(vha, sess, &op->atio);
3391 if (!cmd) {
3392 spin_lock_irqsave(&ha->hardware_lock, flags);
3393 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3394 ha->tgt.tgt_ops->put_sess(sess);
3395 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3396 kfree(op);
3397 return;
3398 }
3399 /*
3400 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3401 * the extra reference taken above by qlt_make_local_sess()
3402 */
3403 __qlt_do_work(cmd);
3404 kfree(op);
3405 return;
3406
3407 out_term:
3408 spin_lock_irqsave(&ha->hardware_lock, flags);
3409 qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3410 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3411 kfree(op);
3412
3413 }
3414
3415 /* ha->hardware_lock supposed to be held on entry */
3416 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3417 struct atio_from_isp *atio)
3418 {
3419 struct qla_hw_data *ha = vha->hw;
3420 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3421 struct qla_tgt_sess *sess;
3422 struct qla_tgt_cmd *cmd;
3423
3424 if (unlikely(tgt->tgt_stop)) {
3425 ql_dbg(ql_dbg_io, vha, 0x3061,
3426 "New command while device %p is shutting down\n", tgt);
3427 return -EFAULT;
3428 }
3429
3430 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3431 if (unlikely(!sess)) {
3432 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3433 GFP_ATOMIC);
3434 if (!op)
3435 return -ENOMEM;
3436
3437 memcpy(&op->atio, atio, sizeof(*atio));
3438 op->vha = vha;
3439 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3440 queue_work(qla_tgt_wq, &op->work);
3441 return 0;
3442 }
3443 /*
3444 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3445 */
3446 kref_get(&sess->se_sess->sess_kref);
3447
3448 cmd = qlt_get_tag(vha, sess, atio);
3449 if (!cmd) {
3450 ql_dbg(ql_dbg_io, vha, 0x3062,
3451 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3452 ha->tgt.tgt_ops->put_sess(sess);
3453 return -ENOMEM;
3454 }
3455
3456 cmd->cmd_flags = 0;
3457 cmd->jiffies_at_alloc = get_jiffies_64();
3458
3459 cmd->reset_count = vha->hw->chip_reset;
3460
3461 cmd->cmd_in_wq = 1;
3462 cmd->cmd_flags |= BIT_0;
3463 INIT_WORK(&cmd->work, qlt_do_work);
3464 queue_work(qla_tgt_wq, &cmd->work);
3465 return 0;
3466
3467 }
3468
3469 /* ha->hardware_lock supposed to be held on entry */
3470 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3471 int fn, void *iocb, int flags)
3472 {
3473 struct scsi_qla_host *vha = sess->vha;
3474 struct qla_hw_data *ha = vha->hw;
3475 struct qla_tgt_mgmt_cmd *mcmd;
3476 int res;
3477 uint8_t tmr_func;
3478
3479 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3480 if (!mcmd) {
3481 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3482 "qla_target(%d): Allocation of management "
3483 "command failed, some commands and their data could "
3484 "leak\n", vha->vp_idx);
3485 return -ENOMEM;
3486 }
3487 memset(mcmd, 0, sizeof(*mcmd));
3488 mcmd->sess = sess;
3489
3490 if (iocb) {
3491 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3492 sizeof(mcmd->orig_iocb.imm_ntfy));
3493 }
3494 mcmd->tmr_func = fn;
3495 mcmd->flags = flags;
3496 mcmd->reset_count = vha->hw->chip_reset;
3497
3498 switch (fn) {
3499 case QLA_TGT_CLEAR_ACA:
3500 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3501 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3502 tmr_func = TMR_CLEAR_ACA;
3503 break;
3504
3505 case QLA_TGT_TARGET_RESET:
3506 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3507 "qla_target(%d): TARGET_RESET received\n",
3508 sess->vha->vp_idx);
3509 tmr_func = TMR_TARGET_WARM_RESET;
3510 break;
3511
3512 case QLA_TGT_LUN_RESET:
3513 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3514 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3515 tmr_func = TMR_LUN_RESET;
3516 break;
3517
3518 case QLA_TGT_CLEAR_TS:
3519 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3520 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3521 tmr_func = TMR_CLEAR_TASK_SET;
3522 break;
3523
3524 case QLA_TGT_ABORT_TS:
3525 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3526 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3527 tmr_func = TMR_ABORT_TASK_SET;
3528 break;
3529 #if 0
3530 case QLA_TGT_ABORT_ALL:
3531 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3532 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3533 sess->vha->vp_idx);
3534 tmr_func = 0;
3535 break;
3536
3537 case QLA_TGT_ABORT_ALL_SESS:
3538 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3539 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3540 sess->vha->vp_idx);
3541 tmr_func = 0;
3542 break;
3543
3544 case QLA_TGT_NEXUS_LOSS_SESS:
3545 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3546 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3547 sess->vha->vp_idx);
3548 tmr_func = 0;
3549 break;
3550
3551 case QLA_TGT_NEXUS_LOSS:
3552 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3553 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3554 tmr_func = 0;
3555 break;
3556 #endif
3557 default:
3558 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3559 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3560 sess->vha->vp_idx, fn);
3561 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3562 return -ENOSYS;
3563 }
3564
3565 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3566 if (res != 0) {
3567 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3568 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3569 sess->vha->vp_idx, res);
3570 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3571 return -EFAULT;
3572 }
3573
3574 return 0;
3575 }
3576
3577 /* ha->hardware_lock supposed to be held on entry */
3578 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3579 {
3580 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3581 struct qla_hw_data *ha = vha->hw;
3582 struct qla_tgt *tgt;
3583 struct qla_tgt_sess *sess;
3584 uint32_t lun, unpacked_lun;
3585 int lun_size, fn;
3586
3587 tgt = vha->vha_tgt.qla_tgt;
3588
3589 lun = a->u.isp24.fcp_cmnd.lun;
3590 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3591 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3592 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3593 a->u.isp24.fcp_hdr.s_id);
3594 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3595
3596 if (!sess) {
3597 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3598 "qla_target(%d): task mgmt fn 0x%x for "
3599 "non-existant session\n", vha->vp_idx, fn);
3600 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3601 sizeof(struct atio_from_isp));
3602 }
3603
3604 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3605 }
3606
3607 /* ha->hardware_lock supposed to be held on entry */
3608 static int __qlt_abort_task(struct scsi_qla_host *vha,
3609 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3610 {
3611 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3612 struct qla_hw_data *ha = vha->hw;
3613 struct qla_tgt_mgmt_cmd *mcmd;
3614 uint32_t lun, unpacked_lun;
3615 int rc;
3616
3617 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3618 if (mcmd == NULL) {
3619 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3620 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3621 vha->vp_idx, __func__);
3622 return -ENOMEM;
3623 }
3624 memset(mcmd, 0, sizeof(*mcmd));
3625
3626 mcmd->sess = sess;
3627 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3628 sizeof(mcmd->orig_iocb.imm_ntfy));
3629
3630 lun = a->u.isp24.fcp_cmnd.lun;
3631 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3632 mcmd->reset_count = vha->hw->chip_reset;
3633
3634 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3635 le16_to_cpu(iocb->u.isp2x.seq_id));
3636 if (rc != 0) {
3637 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3638 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3639 vha->vp_idx, rc);
3640 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3641 return -EFAULT;
3642 }
3643
3644 return 0;
3645 }
3646
3647 /* ha->hardware_lock supposed to be held on entry */
3648 static int qlt_abort_task(struct scsi_qla_host *vha,
3649 struct imm_ntfy_from_isp *iocb)
3650 {
3651 struct qla_hw_data *ha = vha->hw;
3652 struct qla_tgt_sess *sess;
3653 int loop_id;
3654
3655 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3656
3657 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3658 if (sess == NULL) {
3659 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3660 "qla_target(%d): task abort for unexisting "
3661 "session\n", vha->vp_idx);
3662 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3663 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3664 }
3665
3666 return __qlt_abort_task(vha, iocb, sess);
3667 }
3668
3669 /*
3670 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3671 */
3672 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3673 struct imm_ntfy_from_isp *iocb)
3674 {
3675 int res = 0;
3676
3677 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3678 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3679 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3680
3681 switch (iocb->u.isp24.status_subcode) {
3682 case ELS_PLOGI:
3683 case ELS_FLOGI:
3684 case ELS_PRLI:
3685 case ELS_LOGO:
3686 case ELS_PRLO:
3687 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3688 break;
3689 case ELS_PDISC:
3690 case ELS_ADISC:
3691 {
3692 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3693 if (tgt->link_reinit_iocb_pending) {
3694 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3695 0, 0, 0, 0, 0, 0);
3696 tgt->link_reinit_iocb_pending = 0;
3697 }
3698 res = 1; /* send notify ack */
3699 break;
3700 }
3701
3702 default:
3703 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3704 "qla_target(%d): Unsupported ELS command %x "
3705 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3706 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3707 break;
3708 }
3709
3710 return res;
3711 }
3712
3713 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3714 {
3715 #if 1
3716 /*
3717 * FIXME: Reject non zero SRR relative offset until we can test
3718 * this code properly.
3719 */
3720 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3721 return -1;
3722 #else
3723 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3724 size_t first_offset = 0, rem_offset = offset, tmp = 0;
3725 int i, sg_srr_cnt, bufflen = 0;
3726
3727 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3728 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3729 "cmd->sg_cnt: %u, direction: %d\n",
3730 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3731
3732 if (!cmd->sg || !cmd->sg_cnt) {
3733 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3734 "Missing cmd->sg or zero cmd->sg_cnt in"
3735 " qla_tgt_set_data_offset\n");
3736 return -EINVAL;
3737 }
3738 /*
3739 * Walk the current cmd->sg list until we locate the new sg_srr_start
3740 */
3741 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3742 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3743 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3744 i, sg, sg_page(sg), sg->length, sg->offset);
3745
3746 if ((sg->length + tmp) > offset) {
3747 first_offset = rem_offset;
3748 sg_srr_start = sg;
3749 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3750 "Found matching sg[%d], using %p as sg_srr_start, "
3751 "and using first_offset: %zu\n", i, sg,
3752 first_offset);
3753 break;
3754 }
3755 tmp += sg->length;
3756 rem_offset -= sg->length;
3757 }
3758
3759 if (!sg_srr_start) {
3760 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3761 "Unable to locate sg_srr_start for offset: %u\n", offset);
3762 return -EINVAL;
3763 }
3764 sg_srr_cnt = (cmd->sg_cnt - i);
3765
3766 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3767 if (!sg_srr) {
3768 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3769 "Unable to allocate sgp\n");
3770 return -ENOMEM;
3771 }
3772 sg_init_table(sg_srr, sg_srr_cnt);
3773 sgp = &sg_srr[0];
3774 /*
3775 * Walk the remaining list for sg_srr_start, mapping to the newly
3776 * allocated sg_srr taking first_offset into account.
3777 */
3778 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3779 if (first_offset) {
3780 sg_set_page(sgp, sg_page(sg),
3781 (sg->length - first_offset), first_offset);
3782 first_offset = 0;
3783 } else {
3784 sg_set_page(sgp, sg_page(sg), sg->length, 0);
3785 }
3786 bufflen += sgp->length;
3787
3788 sgp = sg_next(sgp);
3789 if (!sgp)
3790 break;
3791 }
3792
3793 cmd->sg = sg_srr;
3794 cmd->sg_cnt = sg_srr_cnt;
3795 cmd->bufflen = bufflen;
3796 cmd->offset += offset;
3797 cmd->free_sg = 1;
3798
3799 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3800 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3801 cmd->sg_cnt);
3802 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3803 cmd->bufflen);
3804 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3805 cmd->offset);
3806
3807 if (cmd->sg_cnt < 0)
3808 BUG();
3809
3810 if (cmd->bufflen < 0)
3811 BUG();
3812
3813 return 0;
3814 #endif
3815 }
3816
3817 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3818 uint32_t srr_rel_offs, int *xmit_type)
3819 {
3820 int res = 0, rel_offs;
3821
3822 rel_offs = srr_rel_offs - cmd->offset;
3823 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3824 srr_rel_offs, rel_offs);
3825
3826 *xmit_type = QLA_TGT_XMIT_ALL;
3827
3828 if (rel_offs < 0) {
3829 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3830 "qla_target(%d): SRR rel_offs (%d) < 0",
3831 cmd->vha->vp_idx, rel_offs);
3832 res = -1;
3833 } else if (rel_offs == cmd->bufflen)
3834 *xmit_type = QLA_TGT_XMIT_STATUS;
3835 else if (rel_offs > 0)
3836 res = qlt_set_data_offset(cmd, rel_offs);
3837
3838 return res;
3839 }
3840
3841 /* No locks, thread context */
3842 static void qlt_handle_srr(struct scsi_qla_host *vha,
3843 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3844 {
3845 struct imm_ntfy_from_isp *ntfy =
3846 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3847 struct qla_hw_data *ha = vha->hw;
3848 struct qla_tgt_cmd *cmd = sctio->cmd;
3849 struct se_cmd *se_cmd = &cmd->se_cmd;
3850 unsigned long flags;
3851 int xmit_type = 0, resp = 0;
3852 uint32_t offset;
3853 uint16_t srr_ui;
3854
3855 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3856 srr_ui = ntfy->u.isp24.srr_ui;
3857
3858 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3859 cmd, srr_ui);
3860
3861 switch (srr_ui) {
3862 case SRR_IU_STATUS:
3863 spin_lock_irqsave(&ha->hardware_lock, flags);
3864 qlt_send_notify_ack(vha, ntfy,
3865 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3866 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3867 xmit_type = QLA_TGT_XMIT_STATUS;
3868 resp = 1;
3869 break;
3870 case SRR_IU_DATA_IN:
3871 if (!cmd->sg || !cmd->sg_cnt) {
3872 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3873 "Unable to process SRR_IU_DATA_IN due to"
3874 " missing cmd->sg, state: %d\n", cmd->state);
3875 dump_stack();
3876 goto out_reject;
3877 }
3878 if (se_cmd->scsi_status != 0) {
3879 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3880 "Rejecting SRR_IU_DATA_IN with non GOOD "
3881 "scsi_status\n");
3882 goto out_reject;
3883 }
3884 cmd->bufflen = se_cmd->data_length;
3885
3886 if (qlt_has_data(cmd)) {
3887 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3888 goto out_reject;
3889 spin_lock_irqsave(&ha->hardware_lock, flags);
3890 qlt_send_notify_ack(vha, ntfy,
3891 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3892 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3893 resp = 1;
3894 } else {
3895 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3896 "qla_target(%d): SRR for in data for cmd "
3897 "without them (tag %d, SCSI status %d), "
3898 "reject", vha->vp_idx, cmd->tag,
3899 cmd->se_cmd.scsi_status);
3900 goto out_reject;
3901 }
3902 break;
3903 case SRR_IU_DATA_OUT:
3904 if (!cmd->sg || !cmd->sg_cnt) {
3905 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3906 "Unable to process SRR_IU_DATA_OUT due to"
3907 " missing cmd->sg\n");
3908 dump_stack();
3909 goto out_reject;
3910 }
3911 if (se_cmd->scsi_status != 0) {
3912 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3913 "Rejecting SRR_IU_DATA_OUT"
3914 " with non GOOD scsi_status\n");
3915 goto out_reject;
3916 }
3917 cmd->bufflen = se_cmd->data_length;
3918
3919 if (qlt_has_data(cmd)) {
3920 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3921 goto out_reject;
3922 spin_lock_irqsave(&ha->hardware_lock, flags);
3923 qlt_send_notify_ack(vha, ntfy,
3924 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3925 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3926 if (xmit_type & QLA_TGT_XMIT_DATA) {
3927 cmd->cmd_flags |= BIT_8;
3928 qlt_rdy_to_xfer(cmd);
3929 }
3930 } else {
3931 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3932 "qla_target(%d): SRR for out data for cmd "
3933 "without them (tag %d, SCSI status %d), "
3934 "reject", vha->vp_idx, cmd->tag,
3935 cmd->se_cmd.scsi_status);
3936 goto out_reject;
3937 }
3938 break;
3939 default:
3940 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3941 "qla_target(%d): Unknown srr_ui value %x",
3942 vha->vp_idx, srr_ui);
3943 goto out_reject;
3944 }
3945
3946 /* Transmit response in case of status and data-in cases */
3947 if (resp) {
3948 cmd->cmd_flags |= BIT_7;
3949 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3950 }
3951
3952 return;
3953
3954 out_reject:
3955 spin_lock_irqsave(&ha->hardware_lock, flags);
3956 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3957 NOTIFY_ACK_SRR_FLAGS_REJECT,
3958 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3959 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3960 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3961 cmd->state = QLA_TGT_STATE_DATA_IN;
3962 dump_stack();
3963 } else {
3964 cmd->cmd_flags |= BIT_9;
3965 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3966 }
3967 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3968 }
3969
3970 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3971 struct qla_tgt_srr_imm *imm, int ha_locked)
3972 {
3973 struct qla_hw_data *ha = vha->hw;
3974 unsigned long flags = 0;
3975
3976 if (!ha_locked)
3977 spin_lock_irqsave(&ha->hardware_lock, flags);
3978
3979 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3980 NOTIFY_ACK_SRR_FLAGS_REJECT,
3981 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3982 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3983
3984 if (!ha_locked)
3985 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3986
3987 kfree(imm);
3988 }
3989
3990 static void qlt_handle_srr_work(struct work_struct *work)
3991 {
3992 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3993 struct scsi_qla_host *vha = tgt->vha;
3994 struct qla_tgt_srr_ctio *sctio;
3995 unsigned long flags;
3996
3997 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3998 tgt);
3999
4000 restart:
4001 spin_lock_irqsave(&tgt->srr_lock, flags);
4002 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4003 struct qla_tgt_srr_imm *imm, *i, *ti;
4004 struct qla_tgt_cmd *cmd;
4005 struct se_cmd *se_cmd;
4006
4007 imm = NULL;
4008 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4009 srr_list_entry) {
4010 if (i->srr_id == sctio->srr_id) {
4011 list_del(&i->srr_list_entry);
4012 if (imm) {
4013 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4014 "qla_target(%d): There must be "
4015 "only one IMM SRR per CTIO SRR "
4016 "(IMM SRR %p, id %d, CTIO %p\n",
4017 vha->vp_idx, i, i->srr_id, sctio);
4018 qlt_reject_free_srr_imm(tgt->vha, i, 0);
4019 } else
4020 imm = i;
4021 }
4022 }
4023
4024 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4025 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4026 sctio->srr_id);
4027
4028 if (imm == NULL) {
4029 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4030 "Not found matching IMM for SRR CTIO (id %d)\n",
4031 sctio->srr_id);
4032 continue;
4033 } else
4034 list_del(&sctio->srr_list_entry);
4035
4036 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4037
4038 cmd = sctio->cmd;
4039 /*
4040 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4041 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4042 * logic..
4043 */
4044 cmd->offset = 0;
4045 if (cmd->free_sg) {
4046 kfree(cmd->sg);
4047 cmd->sg = NULL;
4048 cmd->free_sg = 0;
4049 }
4050 se_cmd = &cmd->se_cmd;
4051
4052 cmd->sg_cnt = se_cmd->t_data_nents;
4053 cmd->sg = se_cmd->t_data_sg;
4054
4055 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4056 "SRR cmd %p (se_cmd %p, tag %d, op %x), "
4057 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
4058 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
4059 cmd->sg_cnt, cmd->offset);
4060
4061 qlt_handle_srr(vha, sctio, imm);
4062
4063 kfree(imm);
4064 kfree(sctio);
4065 goto restart;
4066 }
4067 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4068 }
4069
4070 /* ha->hardware_lock supposed to be held on entry */
4071 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4072 struct imm_ntfy_from_isp *iocb)
4073 {
4074 struct qla_tgt_srr_imm *imm;
4075 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4076 struct qla_tgt_srr_ctio *sctio;
4077
4078 tgt->imm_srr_id++;
4079
4080 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4081 vha->vp_idx);
4082
4083 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4084 if (imm != NULL) {
4085 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4086
4087 /* IRQ is already OFF */
4088 spin_lock(&tgt->srr_lock);
4089 imm->srr_id = tgt->imm_srr_id;
4090 list_add_tail(&imm->srr_list_entry,
4091 &tgt->srr_imm_list);
4092 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4093 "IMM NTFY SRR %p added (id %d, ui %x)\n",
4094 imm, imm->srr_id, iocb->u.isp24.srr_ui);
4095 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4096 int found = 0;
4097 list_for_each_entry(sctio, &tgt->srr_ctio_list,
4098 srr_list_entry) {
4099 if (sctio->srr_id == imm->srr_id) {
4100 found = 1;
4101 break;
4102 }
4103 }
4104 if (found) {
4105 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4106 "Scheduling srr work\n");
4107 schedule_work(&tgt->srr_work);
4108 } else {
4109 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4110 "qla_target(%d): imm_srr_id "
4111 "== ctio_srr_id (%d), but there is no "
4112 "corresponding SRR CTIO, deleting IMM "
4113 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4114 imm);
4115 list_del(&imm->srr_list_entry);
4116
4117 kfree(imm);
4118
4119 spin_unlock(&tgt->srr_lock);
4120 goto out_reject;
4121 }
4122 }
4123 spin_unlock(&tgt->srr_lock);
4124 } else {
4125 struct qla_tgt_srr_ctio *ts;
4126
4127 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4128 "qla_target(%d): Unable to allocate SRR IMM "
4129 "entry, SRR request will be rejected\n", vha->vp_idx);
4130
4131 /* IRQ is already OFF */
4132 spin_lock(&tgt->srr_lock);
4133 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4134 srr_list_entry) {
4135 if (sctio->srr_id == tgt->imm_srr_id) {
4136 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4137 "CTIO SRR %p deleted (id %d)\n",
4138 sctio, sctio->srr_id);
4139 list_del(&sctio->srr_list_entry);
4140 qlt_send_term_exchange(vha, sctio->cmd,
4141 &sctio->cmd->atio, 1);
4142 kfree(sctio);
4143 }
4144 }
4145 spin_unlock(&tgt->srr_lock);
4146 goto out_reject;
4147 }
4148
4149 return;
4150
4151 out_reject:
4152 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4153 NOTIFY_ACK_SRR_FLAGS_REJECT,
4154 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4155 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4156 }
4157
4158 /*
4159 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4160 */
4161 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4162 struct imm_ntfy_from_isp *iocb)
4163 {
4164 struct qla_hw_data *ha = vha->hw;
4165 uint32_t add_flags = 0;
4166 int send_notify_ack = 1;
4167 uint16_t status;
4168
4169 status = le16_to_cpu(iocb->u.isp2x.status);
4170 switch (status) {
4171 case IMM_NTFY_LIP_RESET:
4172 {
4173 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4174 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4175 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4176 iocb->u.isp24.status_subcode);
4177
4178 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4179 send_notify_ack = 0;
4180 break;
4181 }
4182
4183 case IMM_NTFY_LIP_LINK_REINIT:
4184 {
4185 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4186 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4187 "qla_target(%d): LINK REINIT (loop %#x, "
4188 "subcode %x)\n", vha->vp_idx,
4189 le16_to_cpu(iocb->u.isp24.nport_handle),
4190 iocb->u.isp24.status_subcode);
4191 if (tgt->link_reinit_iocb_pending) {
4192 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4193 0, 0, 0, 0, 0, 0);
4194 }
4195 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4196 tgt->link_reinit_iocb_pending = 1;
4197 /*
4198 * QLogic requires to wait after LINK REINIT for possible
4199 * PDISC or ADISC ELS commands
4200 */
4201 send_notify_ack = 0;
4202 break;
4203 }
4204
4205 case IMM_NTFY_PORT_LOGOUT:
4206 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4207 "qla_target(%d): Port logout (loop "
4208 "%#x, subcode %x)\n", vha->vp_idx,
4209 le16_to_cpu(iocb->u.isp24.nport_handle),
4210 iocb->u.isp24.status_subcode);
4211
4212 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4213 send_notify_ack = 0;
4214 /* The sessions will be cleared in the callback, if needed */
4215 break;
4216
4217 case IMM_NTFY_GLBL_TPRLO:
4218 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4219 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4220 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4221 send_notify_ack = 0;
4222 /* The sessions will be cleared in the callback, if needed */
4223 break;
4224
4225 case IMM_NTFY_PORT_CONFIG:
4226 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4227 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4228 status);
4229 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4230 send_notify_ack = 0;
4231 /* The sessions will be cleared in the callback, if needed */
4232 break;
4233
4234 case IMM_NTFY_GLBL_LOGO:
4235 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4236 "qla_target(%d): Link failure detected\n",
4237 vha->vp_idx);
4238 /* I_T nexus loss */
4239 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4240 send_notify_ack = 0;
4241 break;
4242
4243 case IMM_NTFY_IOCB_OVERFLOW:
4244 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4245 "qla_target(%d): Cannot provide requested "
4246 "capability (IOCB overflowed the immediate notify "
4247 "resource count)\n", vha->vp_idx);
4248 break;
4249
4250 case IMM_NTFY_ABORT_TASK:
4251 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4252 "qla_target(%d): Abort Task (S %08x I %#x -> "
4253 "L %#x)\n", vha->vp_idx,
4254 le16_to_cpu(iocb->u.isp2x.seq_id),
4255 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4256 le16_to_cpu(iocb->u.isp2x.lun));
4257 if (qlt_abort_task(vha, iocb) == 0)
4258 send_notify_ack = 0;
4259 break;
4260
4261 case IMM_NTFY_RESOURCE:
4262 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4263 "qla_target(%d): Out of resources, host %ld\n",
4264 vha->vp_idx, vha->host_no);
4265 break;
4266
4267 case IMM_NTFY_MSG_RX:
4268 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4269 "qla_target(%d): Immediate notify task %x\n",
4270 vha->vp_idx, iocb->u.isp2x.task_flags);
4271 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4272 send_notify_ack = 0;
4273 break;
4274
4275 case IMM_NTFY_ELS:
4276 if (qlt_24xx_handle_els(vha, iocb) == 0)
4277 send_notify_ack = 0;
4278 break;
4279
4280 case IMM_NTFY_SRR:
4281 qlt_prepare_srr_imm(vha, iocb);
4282 send_notify_ack = 0;
4283 break;
4284
4285 default:
4286 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4287 "qla_target(%d): Received unknown immediate "
4288 "notify status %x\n", vha->vp_idx, status);
4289 break;
4290 }
4291
4292 if (send_notify_ack)
4293 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4294 }
4295
4296 /*
4297 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4298 * This function sends busy to ISP 2xxx or 24xx.
4299 */
4300 static int __qlt_send_busy(struct scsi_qla_host *vha,
4301 struct atio_from_isp *atio, uint16_t status)
4302 {
4303 struct ctio7_to_24xx *ctio24;
4304 struct qla_hw_data *ha = vha->hw;
4305 request_t *pkt;
4306 struct qla_tgt_sess *sess = NULL;
4307
4308 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4309 atio->u.isp24.fcp_hdr.s_id);
4310 if (!sess) {
4311 qlt_send_term_exchange(vha, NULL, atio, 1);
4312 return 0;
4313 }
4314 /* Sending marker isn't necessary, since we called from ISR */
4315
4316 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4317 if (!pkt) {
4318 ql_dbg(ql_dbg_io, vha, 0x3063,
4319 "qla_target(%d): %s failed: unable to allocate "
4320 "request packet", vha->vp_idx, __func__);
4321 return -ENOMEM;
4322 }
4323
4324 pkt->entry_count = 1;
4325 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4326
4327 ctio24 = (struct ctio7_to_24xx *)pkt;
4328 ctio24->entry_type = CTIO_TYPE7;
4329 ctio24->nport_handle = sess->loop_id;
4330 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4331 ctio24->vp_index = vha->vp_idx;
4332 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4333 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4334 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4335 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4336 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4337 __constant_cpu_to_le16(
4338 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4339 CTIO7_FLAGS_DONT_RET_CTIO);
4340 /*
4341 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4342 * if the explicit conformation is used.
4343 */
4344 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4345 ctio24->u.status1.scsi_status = cpu_to_le16(status);
4346 /* Memory Barrier */
4347 wmb();
4348 qla2x00_start_iocbs(vha, vha->req);
4349 return 0;
4350 }
4351
4352 /*
4353 * This routine is used to allocate a command for either a QFull condition
4354 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4355 * out previously.
4356 */
4357 static void
4358 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4359 struct atio_from_isp *atio, uint16_t status, int qfull)
4360 {
4361 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4362 struct qla_hw_data *ha = vha->hw;
4363 struct qla_tgt_sess *sess;
4364 struct se_session *se_sess;
4365 struct qla_tgt_cmd *cmd;
4366 int tag;
4367
4368 if (unlikely(tgt->tgt_stop)) {
4369 ql_dbg(ql_dbg_io, vha, 0x300a,
4370 "New command while device %p is shutting down\n", tgt);
4371 return;
4372 }
4373
4374 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4375 vha->hw->tgt.num_qfull_cmds_dropped++;
4376 if (vha->hw->tgt.num_qfull_cmds_dropped >
4377 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4378 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4379 vha->hw->tgt.num_qfull_cmds_dropped;
4380
4381 ql_dbg(ql_dbg_io, vha, 0x3068,
4382 "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4383 vha->vp_idx, __func__,
4384 vha->hw->tgt.num_qfull_cmds_dropped);
4385
4386 qlt_chk_exch_leak_thresh_hold(vha);
4387 return;
4388 }
4389
4390 sess = ha->tgt.tgt_ops->find_sess_by_s_id
4391 (vha, atio->u.isp24.fcp_hdr.s_id);
4392 if (!sess)
4393 return;
4394
4395 se_sess = sess->se_sess;
4396
4397 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4398 if (tag < 0)
4399 return;
4400
4401 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4402 if (!cmd) {
4403 ql_dbg(ql_dbg_io, vha, 0x3009,
4404 "qla_target(%d): %s: Allocation of cmd failed\n",
4405 vha->vp_idx, __func__);
4406
4407 vha->hw->tgt.num_qfull_cmds_dropped++;
4408 if (vha->hw->tgt.num_qfull_cmds_dropped >
4409 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4410 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4411 vha->hw->tgt.num_qfull_cmds_dropped;
4412
4413 qlt_chk_exch_leak_thresh_hold(vha);
4414 return;
4415 }
4416
4417 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4418
4419 qlt_incr_num_pend_cmds(vha);
4420 INIT_LIST_HEAD(&cmd->cmd_list);
4421 memcpy(&cmd->atio, atio, sizeof(*atio));
4422
4423 cmd->tgt = vha->vha_tgt.qla_tgt;
4424 cmd->vha = vha;
4425 cmd->reset_count = vha->hw->chip_reset;
4426 cmd->q_full = 1;
4427
4428 if (qfull) {
4429 cmd->q_full = 1;
4430 /* NOTE: borrowing the state field to carry the status */
4431 cmd->state = status;
4432 } else
4433 cmd->term_exchg = 1;
4434
4435 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4436
4437 vha->hw->tgt.num_qfull_cmds_alloc++;
4438 if (vha->hw->tgt.num_qfull_cmds_alloc >
4439 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4440 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4441 vha->hw->tgt.num_qfull_cmds_alloc;
4442 }
4443
4444 int
4445 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4446 {
4447 struct qla_hw_data *ha = vha->hw;
4448 unsigned long flags;
4449 struct qla_tgt_cmd *cmd, *tcmd;
4450 struct list_head free_list;
4451 int rc = 0;
4452
4453 if (list_empty(&ha->tgt.q_full_list))
4454 return 0;
4455
4456 INIT_LIST_HEAD(&free_list);
4457
4458 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4459
4460 if (list_empty(&ha->tgt.q_full_list)) {
4461 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4462 return 0;
4463 }
4464
4465 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4466 if (cmd->q_full)
4467 /* cmd->state is a borrowed field to hold status */
4468 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4469 else if (cmd->term_exchg)
4470 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4471
4472 if (rc == -ENOMEM)
4473 break;
4474
4475 if (cmd->q_full)
4476 ql_dbg(ql_dbg_io, vha, 0x3006,
4477 "%s: busy sent for ox_id[%04x]\n", __func__,
4478 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4479 else if (cmd->term_exchg)
4480 ql_dbg(ql_dbg_io, vha, 0x3007,
4481 "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4482 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4483 else
4484 ql_dbg(ql_dbg_io, vha, 0x3008,
4485 "%s: Unexpected cmd in QFull list %p\n", __func__,
4486 cmd);
4487
4488 list_del(&cmd->cmd_list);
4489 list_add_tail(&cmd->cmd_list, &free_list);
4490
4491 /* piggy back on hardware_lock for protection */
4492 vha->hw->tgt.num_qfull_cmds_alloc--;
4493 }
4494 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4495
4496 cmd = NULL;
4497
4498 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4499 list_del(&cmd->cmd_list);
4500 /* This cmd was never sent to TCM. There is no need
4501 * to schedule free or call free_cmd
4502 */
4503 qlt_free_cmd(cmd);
4504 }
4505 return rc;
4506 }
4507
4508 static void
4509 qlt_send_busy(struct scsi_qla_host *vha,
4510 struct atio_from_isp *atio, uint16_t status)
4511 {
4512 int rc = 0;
4513
4514 rc = __qlt_send_busy(vha, atio, status);
4515 if (rc == -ENOMEM)
4516 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4517 }
4518
4519 static int
4520 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4521 struct atio_from_isp *atio)
4522 {
4523 struct qla_hw_data *ha = vha->hw;
4524 uint16_t status;
4525
4526 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4527 return 0;
4528
4529 status = temp_sam_status;
4530 qlt_send_busy(vha, atio, status);
4531 return 1;
4532 }
4533
4534 /* ha->hardware_lock supposed to be held on entry */
4535 /* called via callback from qla2xxx */
4536 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4537 struct atio_from_isp *atio)
4538 {
4539 struct qla_hw_data *ha = vha->hw;
4540 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4541 int rc;
4542
4543 if (unlikely(tgt == NULL)) {
4544 ql_dbg(ql_dbg_io, vha, 0x3064,
4545 "ATIO pkt, but no tgt (ha %p)", ha);
4546 return;
4547 }
4548 /*
4549 * In tgt_stop mode we also should allow all requests to pass.
4550 * Otherwise, some commands can stuck.
4551 */
4552
4553 tgt->irq_cmd_count++;
4554
4555 switch (atio->u.raw.entry_type) {
4556 case ATIO_TYPE7:
4557 if (unlikely(atio->u.isp24.exchange_addr ==
4558 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4559 ql_dbg(ql_dbg_io, vha, 0x3065,
4560 "qla_target(%d): ATIO_TYPE7 "
4561 "received with UNKNOWN exchange address, "
4562 "sending QUEUE_FULL\n", vha->vp_idx);
4563 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4564 break;
4565 }
4566
4567
4568
4569 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4570 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4571 if (rc != 0) {
4572 tgt->irq_cmd_count--;
4573 return;
4574 }
4575 rc = qlt_handle_cmd_for_atio(vha, atio);
4576 } else {
4577 rc = qlt_handle_task_mgmt(vha, atio);
4578 }
4579 if (unlikely(rc != 0)) {
4580 if (rc == -ESRCH) {
4581 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4582 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4583 #else
4584 qlt_send_term_exchange(vha, NULL, atio, 1);
4585 #endif
4586 } else {
4587 if (tgt->tgt_stop) {
4588 ql_dbg(ql_dbg_tgt, vha, 0xe059,
4589 "qla_target: Unable to send "
4590 "command to target for req, "
4591 "ignoring.\n");
4592 } else {
4593 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4594 "qla_target(%d): Unable to send "
4595 "command to target, sending BUSY "
4596 "status.\n", vha->vp_idx);
4597 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4598 }
4599 }
4600 }
4601 break;
4602
4603 case IMMED_NOTIFY_TYPE:
4604 {
4605 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4606 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4607 "qla_target(%d): Received ATIO packet %x "
4608 "with error status %x\n", vha->vp_idx,
4609 atio->u.raw.entry_type,
4610 atio->u.isp2x.entry_status);
4611 break;
4612 }
4613 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4614 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4615 break;
4616 }
4617
4618 default:
4619 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4620 "qla_target(%d): Received unknown ATIO atio "
4621 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4622 break;
4623 }
4624
4625 tgt->irq_cmd_count--;
4626 }
4627
4628 /* ha->hardware_lock supposed to be held on entry */
4629 /* called via callback from qla2xxx */
4630 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4631 {
4632 struct qla_hw_data *ha = vha->hw;
4633 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4634
4635 if (unlikely(tgt == NULL)) {
4636 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4637 "qla_target(%d): Response pkt %x received, but no "
4638 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4639 return;
4640 }
4641
4642 /*
4643 * In tgt_stop mode we also should allow all requests to pass.
4644 * Otherwise, some commands can stuck.
4645 */
4646
4647 tgt->irq_cmd_count++;
4648
4649 switch (pkt->entry_type) {
4650 case CTIO_CRC2:
4651 case CTIO_TYPE7:
4652 {
4653 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4654 qlt_do_ctio_completion(vha, entry->handle,
4655 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4656 entry);
4657 break;
4658 }
4659
4660 case ACCEPT_TGT_IO_TYPE:
4661 {
4662 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4663 int rc;
4664 if (atio->u.isp2x.status !=
4665 __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4666 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4667 "qla_target(%d): ATIO with error "
4668 "status %x received\n", vha->vp_idx,
4669 le16_to_cpu(atio->u.isp2x.status));
4670 break;
4671 }
4672
4673 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4674 if (rc != 0) {
4675 tgt->irq_cmd_count--;
4676 return;
4677 }
4678
4679 rc = qlt_handle_cmd_for_atio(vha, atio);
4680 if (unlikely(rc != 0)) {
4681 if (rc == -ESRCH) {
4682 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4683 qlt_send_busy(vha, atio, 0);
4684 #else
4685 qlt_send_term_exchange(vha, NULL, atio, 1);
4686 #endif
4687 } else {
4688 if (tgt->tgt_stop) {
4689 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4690 "qla_target: Unable to send "
4691 "command to target, sending TERM "
4692 "EXCHANGE for rsp\n");
4693 qlt_send_term_exchange(vha, NULL,
4694 atio, 1);
4695 } else {
4696 ql_dbg(ql_dbg_tgt, vha, 0xe060,
4697 "qla_target(%d): Unable to send "
4698 "command to target, sending BUSY "
4699 "status\n", vha->vp_idx);
4700 qlt_send_busy(vha, atio, 0);
4701 }
4702 }
4703 }
4704 }
4705 break;
4706
4707 case CONTINUE_TGT_IO_TYPE:
4708 {
4709 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4710 qlt_do_ctio_completion(vha, entry->handle,
4711 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4712 entry);
4713 break;
4714 }
4715
4716 case CTIO_A64_TYPE:
4717 {
4718 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4719 qlt_do_ctio_completion(vha, entry->handle,
4720 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4721 entry);
4722 break;
4723 }
4724
4725 case IMMED_NOTIFY_TYPE:
4726 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4727 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4728 break;
4729
4730 case NOTIFY_ACK_TYPE:
4731 if (tgt->notify_ack_expected > 0) {
4732 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4733 ql_dbg(ql_dbg_tgt, vha, 0xe036,
4734 "NOTIFY_ACK seq %08x status %x\n",
4735 le16_to_cpu(entry->u.isp2x.seq_id),
4736 le16_to_cpu(entry->u.isp2x.status));
4737 tgt->notify_ack_expected--;
4738 if (entry->u.isp2x.status !=
4739 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4740 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4741 "qla_target(%d): NOTIFY_ACK "
4742 "failed %x\n", vha->vp_idx,
4743 le16_to_cpu(entry->u.isp2x.status));
4744 }
4745 } else {
4746 ql_dbg(ql_dbg_tgt, vha, 0xe062,
4747 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4748 vha->vp_idx);
4749 }
4750 break;
4751
4752 case ABTS_RECV_24XX:
4753 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4754 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4755 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4756 break;
4757
4758 case ABTS_RESP_24XX:
4759 if (tgt->abts_resp_expected > 0) {
4760 struct abts_resp_from_24xx_fw *entry =
4761 (struct abts_resp_from_24xx_fw *)pkt;
4762 ql_dbg(ql_dbg_tgt, vha, 0xe038,
4763 "ABTS_RESP_24XX: compl_status %x\n",
4764 entry->compl_status);
4765 tgt->abts_resp_expected--;
4766 if (le16_to_cpu(entry->compl_status) !=
4767 ABTS_RESP_COMPL_SUCCESS) {
4768 if ((entry->error_subcode1 == 0x1E) &&
4769 (entry->error_subcode2 == 0)) {
4770 /*
4771 * We've got a race here: aborted
4772 * exchange not terminated, i.e.
4773 * response for the aborted command was
4774 * sent between the abort request was
4775 * received and processed.
4776 * Unfortunately, the firmware has a
4777 * silly requirement that all aborted
4778 * exchanges must be explicitely
4779 * terminated, otherwise it refuses to
4780 * send responses for the abort
4781 * requests. So, we have to
4782 * (re)terminate the exchange and retry
4783 * the abort response.
4784 */
4785 qlt_24xx_retry_term_exchange(vha,
4786 entry);
4787 } else
4788 ql_dbg(ql_dbg_tgt, vha, 0xe063,
4789 "qla_target(%d): ABTS_RESP_24XX "
4790 "failed %x (subcode %x:%x)",
4791 vha->vp_idx, entry->compl_status,
4792 entry->error_subcode1,
4793 entry->error_subcode2);
4794 }
4795 } else {
4796 ql_dbg(ql_dbg_tgt, vha, 0xe064,
4797 "qla_target(%d): Unexpected ABTS_RESP_24XX "
4798 "received\n", vha->vp_idx);
4799 }
4800 break;
4801
4802 default:
4803 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4804 "qla_target(%d): Received unknown response pkt "
4805 "type %x\n", vha->vp_idx, pkt->entry_type);
4806 break;
4807 }
4808
4809 tgt->irq_cmd_count--;
4810 }
4811
4812 /*
4813 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4814 */
4815 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4816 uint16_t *mailbox)
4817 {
4818 struct qla_hw_data *ha = vha->hw;
4819 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4820 int login_code;
4821
4822 if (!ha->tgt.tgt_ops)
4823 return;
4824
4825 if (unlikely(tgt == NULL)) {
4826 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4827 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4828 return;
4829 }
4830
4831 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4832 IS_QLA2100(ha))
4833 return;
4834 /*
4835 * In tgt_stop mode we also should allow all requests to pass.
4836 * Otherwise, some commands can stuck.
4837 */
4838
4839 tgt->irq_cmd_count++;
4840
4841 switch (code) {
4842 case MBA_RESET: /* Reset */
4843 case MBA_SYSTEM_ERR: /* System Error */
4844 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
4845 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
4846 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4847 "qla_target(%d): System error async event %#x "
4848 "occurred", vha->vp_idx, code);
4849 break;
4850 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
4851 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4852 break;
4853
4854 case MBA_LOOP_UP:
4855 {
4856 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4857 "qla_target(%d): Async LOOP_UP occurred "
4858 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4859 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4860 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4861 if (tgt->link_reinit_iocb_pending) {
4862 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4863 0, 0, 0, 0, 0, 0);
4864 tgt->link_reinit_iocb_pending = 0;
4865 }
4866 break;
4867 }
4868
4869 case MBA_LIP_OCCURRED:
4870 case MBA_LOOP_DOWN:
4871 case MBA_LIP_RESET:
4872 case MBA_RSCN_UPDATE:
4873 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4874 "qla_target(%d): Async event %#x occurred "
4875 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4876 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4877 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4878 break;
4879
4880 case MBA_PORT_UPDATE:
4881 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4882 "qla_target(%d): Port update async event %#x "
4883 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4884 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4885 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4886 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4887
4888 login_code = le16_to_cpu(mailbox[2]);
4889 if (login_code == 0x4)
4890 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4891 "Async MB 2: Got PLOGI Complete\n");
4892 else if (login_code == 0x7)
4893 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4894 "Async MB 2: Port Logged Out\n");
4895 break;
4896
4897 default:
4898 break;
4899 }
4900
4901 tgt->irq_cmd_count--;
4902 }
4903
4904 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4905 uint16_t loop_id)
4906 {
4907 fc_port_t *fcport;
4908 int rc;
4909
4910 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4911 if (!fcport) {
4912 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4913 "qla_target(%d): Allocation of tmp FC port failed",
4914 vha->vp_idx);
4915 return NULL;
4916 }
4917
4918 fcport->loop_id = loop_id;
4919
4920 rc = qla2x00_get_port_database(vha, fcport, 0);
4921 if (rc != QLA_SUCCESS) {
4922 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4923 "qla_target(%d): Failed to retrieve fcport "
4924 "information -- get_port_database() returned %x "
4925 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4926 kfree(fcport);
4927 return NULL;
4928 }
4929
4930 return fcport;
4931 }
4932
4933 /* Must be called under tgt_mutex */
4934 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4935 uint8_t *s_id)
4936 {
4937 struct qla_tgt_sess *sess = NULL;
4938 fc_port_t *fcport = NULL;
4939 int rc, global_resets;
4940 uint16_t loop_id = 0;
4941
4942 retry:
4943 global_resets =
4944 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4945
4946 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4947 if (rc != 0) {
4948 if ((s_id[0] == 0xFF) &&
4949 (s_id[1] == 0xFC)) {
4950 /*
4951 * This is Domain Controller, so it should be
4952 * OK to drop SCSI commands from it.
4953 */
4954 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4955 "Unable to find initiator with S_ID %x:%x:%x",
4956 s_id[0], s_id[1], s_id[2]);
4957 } else
4958 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4959 "qla_target(%d): Unable to find "
4960 "initiator with S_ID %x:%x:%x",
4961 vha->vp_idx, s_id[0], s_id[1],
4962 s_id[2]);
4963 return NULL;
4964 }
4965
4966 fcport = qlt_get_port_database(vha, loop_id);
4967 if (!fcport)
4968 return NULL;
4969
4970 if (global_resets !=
4971 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4972 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4973 "qla_target(%d): global reset during session discovery "
4974 "(counter was %d, new %d), retrying", vha->vp_idx,
4975 global_resets,
4976 atomic_read(&vha->vha_tgt.
4977 qla_tgt->tgt_global_resets_count));
4978 goto retry;
4979 }
4980
4981 sess = qlt_create_sess(vha, fcport, true);
4982
4983 kfree(fcport);
4984 return sess;
4985 }
4986
4987 static void qlt_abort_work(struct qla_tgt *tgt,
4988 struct qla_tgt_sess_work_param *prm)
4989 {
4990 struct scsi_qla_host *vha = tgt->vha;
4991 struct qla_hw_data *ha = vha->hw;
4992 struct qla_tgt_sess *sess = NULL;
4993 unsigned long flags;
4994 uint32_t be_s_id;
4995 uint8_t s_id[3];
4996 int rc;
4997
4998 spin_lock_irqsave(&ha->hardware_lock, flags);
4999
5000 if (tgt->tgt_stop)
5001 goto out_term;
5002
5003 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5004 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5005 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5006
5007 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5008 (unsigned char *)&be_s_id);
5009 if (!sess) {
5010 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5011
5012 mutex_lock(&vha->vha_tgt.tgt_mutex);
5013 sess = qlt_make_local_sess(vha, s_id);
5014 /* sess has got an extra creation ref */
5015 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5016
5017 spin_lock_irqsave(&ha->hardware_lock, flags);
5018 if (!sess)
5019 goto out_term;
5020 } else {
5021 kref_get(&sess->se_sess->sess_kref);
5022 }
5023
5024 if (tgt->tgt_stop)
5025 goto out_term;
5026
5027 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5028 if (rc != 0)
5029 goto out_term;
5030
5031 ha->tgt.tgt_ops->put_sess(sess);
5032 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5033 return;
5034
5035 out_term:
5036 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5037 if (sess)
5038 ha->tgt.tgt_ops->put_sess(sess);
5039 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5040 }
5041
5042 static void qlt_tmr_work(struct qla_tgt *tgt,
5043 struct qla_tgt_sess_work_param *prm)
5044 {
5045 struct atio_from_isp *a = &prm->tm_iocb2;
5046 struct scsi_qla_host *vha = tgt->vha;
5047 struct qla_hw_data *ha = vha->hw;
5048 struct qla_tgt_sess *sess = NULL;
5049 unsigned long flags;
5050 uint8_t *s_id = NULL; /* to hide compiler warnings */
5051 int rc;
5052 uint32_t lun, unpacked_lun;
5053 int lun_size, fn;
5054 void *iocb;
5055
5056 spin_lock_irqsave(&ha->hardware_lock, flags);
5057
5058 if (tgt->tgt_stop)
5059 goto out_term;
5060
5061 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5062 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5063 if (!sess) {
5064 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5065
5066 mutex_lock(&vha->vha_tgt.tgt_mutex);
5067 sess = qlt_make_local_sess(vha, s_id);
5068 /* sess has got an extra creation ref */
5069 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5070
5071 spin_lock_irqsave(&ha->hardware_lock, flags);
5072 if (!sess)
5073 goto out_term;
5074 } else {
5075 kref_get(&sess->se_sess->sess_kref);
5076 }
5077
5078 iocb = a;
5079 lun = a->u.isp24.fcp_cmnd.lun;
5080 lun_size = sizeof(lun);
5081 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5082 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5083
5084 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5085 if (rc != 0)
5086 goto out_term;
5087
5088 ha->tgt.tgt_ops->put_sess(sess);
5089 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5090 return;
5091
5092 out_term:
5093 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5094 if (sess)
5095 ha->tgt.tgt_ops->put_sess(sess);
5096 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5097 }
5098
5099 static void qlt_sess_work_fn(struct work_struct *work)
5100 {
5101 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5102 struct scsi_qla_host *vha = tgt->vha;
5103 unsigned long flags;
5104
5105 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5106
5107 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5108 while (!list_empty(&tgt->sess_works_list)) {
5109 struct qla_tgt_sess_work_param *prm = list_entry(
5110 tgt->sess_works_list.next, typeof(*prm),
5111 sess_works_list_entry);
5112
5113 /*
5114 * This work can be scheduled on several CPUs at time, so we
5115 * must delete the entry to eliminate double processing
5116 */
5117 list_del(&prm->sess_works_list_entry);
5118
5119 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5120
5121 switch (prm->type) {
5122 case QLA_TGT_SESS_WORK_ABORT:
5123 qlt_abort_work(tgt, prm);
5124 break;
5125 case QLA_TGT_SESS_WORK_TM:
5126 qlt_tmr_work(tgt, prm);
5127 break;
5128 default:
5129 BUG_ON(1);
5130 break;
5131 }
5132
5133 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5134
5135 kfree(prm);
5136 }
5137 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5138 }
5139
5140 /* Must be called under tgt_host_action_mutex */
5141 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5142 {
5143 struct qla_tgt *tgt;
5144
5145 if (!QLA_TGT_MODE_ENABLED())
5146 return 0;
5147
5148 if (!IS_TGT_MODE_CAPABLE(ha)) {
5149 ql_log(ql_log_warn, base_vha, 0xe070,
5150 "This adapter does not support target mode.\n");
5151 return 0;
5152 }
5153
5154 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5155 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5156
5157 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5158
5159 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5160 if (!tgt) {
5161 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5162 "Unable to allocate struct qla_tgt\n");
5163 return -ENOMEM;
5164 }
5165
5166 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5167 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5168
5169 tgt->ha = ha;
5170 tgt->vha = base_vha;
5171 init_waitqueue_head(&tgt->waitQ);
5172 INIT_LIST_HEAD(&tgt->sess_list);
5173 INIT_LIST_HEAD(&tgt->del_sess_list);
5174 INIT_DELAYED_WORK(&tgt->sess_del_work,
5175 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5176 spin_lock_init(&tgt->sess_work_lock);
5177 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5178 INIT_LIST_HEAD(&tgt->sess_works_list);
5179 spin_lock_init(&tgt->srr_lock);
5180 INIT_LIST_HEAD(&tgt->srr_ctio_list);
5181 INIT_LIST_HEAD(&tgt->srr_imm_list);
5182 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5183 atomic_set(&tgt->tgt_global_resets_count, 0);
5184
5185 base_vha->vha_tgt.qla_tgt = tgt;
5186
5187 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5188 "qla_target(%d): using 64 Bit PCI addressing",
5189 base_vha->vp_idx);
5190 tgt->tgt_enable_64bit_addr = 1;
5191 /* 3 is reserved */
5192 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5193 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5194 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5195
5196 if (base_vha->fc_vport)
5197 return 0;
5198
5199 mutex_lock(&qla_tgt_mutex);
5200 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5201 mutex_unlock(&qla_tgt_mutex);
5202
5203 return 0;
5204 }
5205
5206 /* Must be called under tgt_host_action_mutex */
5207 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5208 {
5209 if (!vha->vha_tgt.qla_tgt)
5210 return 0;
5211
5212 if (vha->fc_vport) {
5213 qlt_release(vha->vha_tgt.qla_tgt);
5214 return 0;
5215 }
5216
5217 /* free left over qfull cmds */
5218 qlt_init_term_exchange(vha);
5219
5220 mutex_lock(&qla_tgt_mutex);
5221 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5222 mutex_unlock(&qla_tgt_mutex);
5223
5224 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5225 vha->host_no, ha);
5226 qlt_release(vha->vha_tgt.qla_tgt);
5227
5228 return 0;
5229 }
5230
5231 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5232 unsigned char *b)
5233 {
5234 int i;
5235
5236 pr_debug("qla2xxx HW vha->node_name: ");
5237 for (i = 0; i < WWN_SIZE; i++)
5238 pr_debug("%02x ", vha->node_name[i]);
5239 pr_debug("\n");
5240 pr_debug("qla2xxx HW vha->port_name: ");
5241 for (i = 0; i < WWN_SIZE; i++)
5242 pr_debug("%02x ", vha->port_name[i]);
5243 pr_debug("\n");
5244
5245 pr_debug("qla2xxx passed configfs WWPN: ");
5246 put_unaligned_be64(wwpn, b);
5247 for (i = 0; i < WWN_SIZE; i++)
5248 pr_debug("%02x ", b[i]);
5249 pr_debug("\n");
5250 }
5251
5252 /**
5253 * qla_tgt_lport_register - register lport with external module
5254 *
5255 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5256 * @wwpn: Passwd FC target WWPN
5257 * @callback: lport initialization callback for tcm_qla2xxx code
5258 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5259 */
5260 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5261 u64 npiv_wwpn, u64 npiv_wwnn,
5262 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5263 {
5264 struct qla_tgt *tgt;
5265 struct scsi_qla_host *vha;
5266 struct qla_hw_data *ha;
5267 struct Scsi_Host *host;
5268 unsigned long flags;
5269 int rc;
5270 u8 b[WWN_SIZE];
5271
5272 mutex_lock(&qla_tgt_mutex);
5273 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5274 vha = tgt->vha;
5275 ha = vha->hw;
5276
5277 host = vha->host;
5278 if (!host)
5279 continue;
5280
5281 if (!(host->hostt->supported_mode & MODE_TARGET))
5282 continue;
5283
5284 spin_lock_irqsave(&ha->hardware_lock, flags);
5285 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5286 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5287 host->host_no);
5288 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5289 continue;
5290 }
5291 if (tgt->tgt_stop) {
5292 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5293 host->host_no);
5294 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5295 continue;
5296 }
5297 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5298
5299 if (!scsi_host_get(host)) {
5300 ql_dbg(ql_dbg_tgt, vha, 0xe068,
5301 "Unable to scsi_host_get() for"
5302 " qla2xxx scsi_host\n");
5303 continue;
5304 }
5305 qlt_lport_dump(vha, phys_wwpn, b);
5306
5307 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5308 scsi_host_put(host);
5309 continue;
5310 }
5311 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5312 if (rc != 0)
5313 scsi_host_put(host);
5314
5315 mutex_unlock(&qla_tgt_mutex);
5316 return rc;
5317 }
5318 mutex_unlock(&qla_tgt_mutex);
5319
5320 return -ENODEV;
5321 }
5322 EXPORT_SYMBOL(qlt_lport_register);
5323
5324 /**
5325 * qla_tgt_lport_deregister - Degister lport
5326 *
5327 * @vha: Registered scsi_qla_host pointer
5328 */
5329 void qlt_lport_deregister(struct scsi_qla_host *vha)
5330 {
5331 struct qla_hw_data *ha = vha->hw;
5332 struct Scsi_Host *sh = vha->host;
5333 /*
5334 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5335 */
5336 vha->vha_tgt.target_lport_ptr = NULL;
5337 ha->tgt.tgt_ops = NULL;
5338 /*
5339 * Release the Scsi_Host reference for the underlying qla2xxx host
5340 */
5341 scsi_host_put(sh);
5342 }
5343 EXPORT_SYMBOL(qlt_lport_deregister);
5344
5345 /* Must be called under HW lock */
5346 static void qlt_set_mode(struct scsi_qla_host *vha)
5347 {
5348 struct qla_hw_data *ha = vha->hw;
5349
5350 switch (ql2x_ini_mode) {
5351 case QLA2XXX_INI_MODE_DISABLED:
5352 case QLA2XXX_INI_MODE_EXCLUSIVE:
5353 vha->host->active_mode = MODE_TARGET;
5354 break;
5355 case QLA2XXX_INI_MODE_ENABLED:
5356 vha->host->active_mode |= MODE_TARGET;
5357 break;
5358 default:
5359 break;
5360 }
5361
5362 if (ha->tgt.ini_mode_force_reverse)
5363 qla_reverse_ini_mode(vha);
5364 }
5365
5366 /* Must be called under HW lock */
5367 static void qlt_clear_mode(struct scsi_qla_host *vha)
5368 {
5369 struct qla_hw_data *ha = vha->hw;
5370
5371 switch (ql2x_ini_mode) {
5372 case QLA2XXX_INI_MODE_DISABLED:
5373 vha->host->active_mode = MODE_UNKNOWN;
5374 break;
5375 case QLA2XXX_INI_MODE_EXCLUSIVE:
5376 vha->host->active_mode = MODE_INITIATOR;
5377 break;
5378 case QLA2XXX_INI_MODE_ENABLED:
5379 vha->host->active_mode &= ~MODE_TARGET;
5380 break;
5381 default:
5382 break;
5383 }
5384
5385 if (ha->tgt.ini_mode_force_reverse)
5386 qla_reverse_ini_mode(vha);
5387 }
5388
5389 /*
5390 * qla_tgt_enable_vha - NO LOCK HELD
5391 *
5392 * host_reset, bring up w/ Target Mode Enabled
5393 */
5394 void
5395 qlt_enable_vha(struct scsi_qla_host *vha)
5396 {
5397 struct qla_hw_data *ha = vha->hw;
5398 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5399 unsigned long flags;
5400 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5401
5402 if (!tgt) {
5403 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5404 "Unable to locate qla_tgt pointer from"
5405 " struct qla_hw_data\n");
5406 dump_stack();
5407 return;
5408 }
5409
5410 spin_lock_irqsave(&ha->hardware_lock, flags);
5411 tgt->tgt_stopped = 0;
5412 qlt_set_mode(vha);
5413 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5414
5415 if (vha->vp_idx) {
5416 qla24xx_disable_vp(vha);
5417 qla24xx_enable_vp(vha);
5418 } else {
5419 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5420 qla2xxx_wake_dpc(base_vha);
5421 qla2x00_wait_for_hba_online(base_vha);
5422 }
5423 }
5424 EXPORT_SYMBOL(qlt_enable_vha);
5425
5426 /*
5427 * qla_tgt_disable_vha - NO LOCK HELD
5428 *
5429 * Disable Target Mode and reset the adapter
5430 */
5431 static void qlt_disable_vha(struct scsi_qla_host *vha)
5432 {
5433 struct qla_hw_data *ha = vha->hw;
5434 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5435 unsigned long flags;
5436
5437 if (!tgt) {
5438 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5439 "Unable to locate qla_tgt pointer from"
5440 " struct qla_hw_data\n");
5441 dump_stack();
5442 return;
5443 }
5444
5445 spin_lock_irqsave(&ha->hardware_lock, flags);
5446 qlt_clear_mode(vha);
5447 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5448
5449 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5450 qla2xxx_wake_dpc(vha);
5451 qla2x00_wait_for_hba_online(vha);
5452 }
5453
5454 /*
5455 * Called from qla_init.c:qla24xx_vport_create() contex to setup
5456 * the target mode specific struct scsi_qla_host and struct qla_hw_data
5457 * members.
5458 */
5459 void
5460 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5461 {
5462 if (!qla_tgt_mode_enabled(vha))
5463 return;
5464
5465 vha->vha_tgt.qla_tgt = NULL;
5466
5467 mutex_init(&vha->vha_tgt.tgt_mutex);
5468 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5469
5470 qlt_clear_mode(vha);
5471
5472 /*
5473 * NOTE: Currently the value is kept the same for <24xx and
5474 * >=24xx ISPs. If it is necessary to change it,
5475 * the check should be added for specific ISPs,
5476 * assigning the value appropriately.
5477 */
5478 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5479
5480 qlt_add_target(ha, vha);
5481 }
5482
5483 void
5484 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5485 {
5486 /*
5487 * FC-4 Feature bit 0 indicates target functionality to the name server.
5488 */
5489 if (qla_tgt_mode_enabled(vha)) {
5490 if (qla_ini_mode_enabled(vha))
5491 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5492 else
5493 ct_req->req.rff_id.fc4_feature = BIT_0;
5494 } else if (qla_ini_mode_enabled(vha)) {
5495 ct_req->req.rff_id.fc4_feature = BIT_1;
5496 }
5497 }
5498
5499 /*
5500 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5501 * @ha: HA context
5502 *
5503 * Beginning of ATIO ring has initialization control block already built
5504 * by nvram config routine.
5505 *
5506 * Returns 0 on success.
5507 */
5508 void
5509 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5510 {
5511 struct qla_hw_data *ha = vha->hw;
5512 uint16_t cnt;
5513 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5514
5515 if (!qla_tgt_mode_enabled(vha))
5516 return;
5517
5518 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5519 pkt->u.raw.signature = ATIO_PROCESSED;
5520 pkt++;
5521 }
5522
5523 }
5524
5525 /*
5526 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5527 * @ha: SCSI driver HA context
5528 */
5529 void
5530 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5531 {
5532 struct qla_hw_data *ha = vha->hw;
5533 struct atio_from_isp *pkt;
5534 int cnt, i;
5535
5536 if (!vha->flags.online)
5537 return;
5538
5539 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5540 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5541 cnt = pkt->u.raw.entry_count;
5542
5543 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5544
5545 for (i = 0; i < cnt; i++) {
5546 ha->tgt.atio_ring_index++;
5547 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5548 ha->tgt.atio_ring_index = 0;
5549 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5550 } else
5551 ha->tgt.atio_ring_ptr++;
5552
5553 pkt->u.raw.signature = ATIO_PROCESSED;
5554 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5555 }
5556 wmb();
5557 }
5558
5559 /* Adjust ring index */
5560 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5561 }
5562
5563 void
5564 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5565 {
5566 struct qla_hw_data *ha = vha->hw;
5567 if (!QLA_TGT_MODE_ENABLED())
5568 return;
5569
5570 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5571 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5572 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5573
5574 if (IS_ATIO_MSIX_CAPABLE(ha)) {
5575 struct qla_msix_entry *msix = &ha->msix_entries[2];
5576 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5577
5578 icb->msix_atio = cpu_to_le16(msix->entry);
5579 ql_dbg(ql_dbg_init, vha, 0xf072,
5580 "Registering ICB vector 0x%x for atio que.\n",
5581 msix->entry);
5582 }
5583 }
5584
5585 void
5586 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5587 {
5588 struct qla_hw_data *ha = vha->hw;
5589
5590 if (qla_tgt_mode_enabled(vha)) {
5591 if (!ha->tgt.saved_set) {
5592 /* We save only once */
5593 ha->tgt.saved_exchange_count = nv->exchange_count;
5594 ha->tgt.saved_firmware_options_1 =
5595 nv->firmware_options_1;
5596 ha->tgt.saved_firmware_options_2 =
5597 nv->firmware_options_2;
5598 ha->tgt.saved_firmware_options_3 =
5599 nv->firmware_options_3;
5600 ha->tgt.saved_set = 1;
5601 }
5602
5603 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5604
5605 /* Enable target mode */
5606 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5607
5608 /* Disable ini mode, if requested */
5609 if (!qla_ini_mode_enabled(vha))
5610 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5611
5612 /* Disable Full Login after LIP */
5613 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5614 /* Enable initial LIP */
5615 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5616 if (ql2xtgt_tape_enable)
5617 /* Enable FC Tape support */
5618 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5619 else
5620 /* Disable FC Tape support */
5621 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5622
5623 /* Disable Full Login after LIP */
5624 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5625 /* Enable target PRLI control */
5626 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5627 } else {
5628 if (ha->tgt.saved_set) {
5629 nv->exchange_count = ha->tgt.saved_exchange_count;
5630 nv->firmware_options_1 =
5631 ha->tgt.saved_firmware_options_1;
5632 nv->firmware_options_2 =
5633 ha->tgt.saved_firmware_options_2;
5634 nv->firmware_options_3 =
5635 ha->tgt.saved_firmware_options_3;
5636 }
5637 return;
5638 }
5639
5640 /* out-of-order frames reassembly */
5641 nv->firmware_options_3 |= BIT_6|BIT_9;
5642
5643 if (ha->tgt.enable_class_2) {
5644 if (vha->flags.init_done)
5645 fc_host_supported_classes(vha->host) =
5646 FC_COS_CLASS2 | FC_COS_CLASS3;
5647
5648 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5649 } else {
5650 if (vha->flags.init_done)
5651 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5652
5653 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5654 }
5655 }
5656
5657 void
5658 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5659 struct init_cb_24xx *icb)
5660 {
5661 struct qla_hw_data *ha = vha->hw;
5662
5663 if (ha->tgt.node_name_set) {
5664 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5665 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5666 }
5667 }
5668
5669 void
5670 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5671 {
5672 struct qla_hw_data *ha = vha->hw;
5673
5674 if (!QLA_TGT_MODE_ENABLED())
5675 return;
5676
5677 if (qla_tgt_mode_enabled(vha)) {
5678 if (!ha->tgt.saved_set) {
5679 /* We save only once */
5680 ha->tgt.saved_exchange_count = nv->exchange_count;
5681 ha->tgt.saved_firmware_options_1 =
5682 nv->firmware_options_1;
5683 ha->tgt.saved_firmware_options_2 =
5684 nv->firmware_options_2;
5685 ha->tgt.saved_firmware_options_3 =
5686 nv->firmware_options_3;
5687 ha->tgt.saved_set = 1;
5688 }
5689
5690 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5691
5692 /* Enable target mode */
5693 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5694
5695 /* Disable ini mode, if requested */
5696 if (!qla_ini_mode_enabled(vha))
5697 nv->firmware_options_1 |=
5698 __constant_cpu_to_le32(BIT_5);
5699
5700 /* Disable Full Login after LIP */
5701 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5702 /* Enable initial LIP */
5703 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5704 if (ql2xtgt_tape_enable)
5705 /* Enable FC tape support */
5706 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5707 else
5708 /* Disable FC tape support */
5709 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5710
5711 /* Disable Full Login after LIP */
5712 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5713 /* Enable target PRLI control */
5714 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5715 } else {
5716 if (ha->tgt.saved_set) {
5717 nv->exchange_count = ha->tgt.saved_exchange_count;
5718 nv->firmware_options_1 =
5719 ha->tgt.saved_firmware_options_1;
5720 nv->firmware_options_2 =
5721 ha->tgt.saved_firmware_options_2;
5722 nv->firmware_options_3 =
5723 ha->tgt.saved_firmware_options_3;
5724 }
5725 return;
5726 }
5727
5728 /* out-of-order frames reassembly */
5729 nv->firmware_options_3 |= BIT_6|BIT_9;
5730
5731 if (ha->tgt.enable_class_2) {
5732 if (vha->flags.init_done)
5733 fc_host_supported_classes(vha->host) =
5734 FC_COS_CLASS2 | FC_COS_CLASS3;
5735
5736 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5737 } else {
5738 if (vha->flags.init_done)
5739 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5740
5741 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5742 }
5743 }
5744
5745 void
5746 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5747 struct init_cb_81xx *icb)
5748 {
5749 struct qla_hw_data *ha = vha->hw;
5750
5751 if (!QLA_TGT_MODE_ENABLED())
5752 return;
5753
5754 if (ha->tgt.node_name_set) {
5755 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5756 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5757 }
5758 }
5759
5760 void
5761 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5762 {
5763 if (!QLA_TGT_MODE_ENABLED())
5764 return;
5765
5766 ha->msix_count += 1; /* For ATIO Q */
5767 }
5768
5769 int
5770 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5771 struct sts_entry_24xx *pkt)
5772 {
5773 switch (pkt->entry_type) {
5774 case ABTS_RECV_24XX:
5775 case ABTS_RESP_24XX:
5776 case CTIO_TYPE7:
5777 case NOTIFY_ACK_TYPE:
5778 case CTIO_CRC2:
5779 return 1;
5780 default:
5781 return 0;
5782 }
5783 }
5784
5785 void
5786 qlt_modify_vp_config(struct scsi_qla_host *vha,
5787 struct vp_config_entry_24xx *vpmod)
5788 {
5789 if (qla_tgt_mode_enabled(vha))
5790 vpmod->options_idx1 &= ~BIT_5;
5791 /* Disable ini mode, if requested */
5792 if (!qla_ini_mode_enabled(vha))
5793 vpmod->options_idx1 &= ~BIT_4;
5794 }
5795
5796 void
5797 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5798 {
5799 if (!QLA_TGT_MODE_ENABLED())
5800 return;
5801
5802 if (ha->mqenable || IS_QLA83XX(ha)) {
5803 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5804 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5805 } else {
5806 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5807 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5808 }
5809
5810 mutex_init(&base_vha->vha_tgt.tgt_mutex);
5811 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5812 qlt_clear_mode(base_vha);
5813 }
5814
5815 irqreturn_t
5816 qla83xx_msix_atio_q(int irq, void *dev_id)
5817 {
5818 struct rsp_que *rsp;
5819 scsi_qla_host_t *vha;
5820 struct qla_hw_data *ha;
5821 unsigned long flags;
5822
5823 rsp = (struct rsp_que *) dev_id;
5824 ha = rsp->hw;
5825 vha = pci_get_drvdata(ha->pdev);
5826
5827 spin_lock_irqsave(&ha->hardware_lock, flags);
5828
5829 qlt_24xx_process_atio_queue(vha);
5830 qla24xx_process_response_queue(vha, rsp);
5831
5832 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5833
5834 return IRQ_HANDLED;
5835 }
5836
5837 int
5838 qlt_mem_alloc(struct qla_hw_data *ha)
5839 {
5840 if (!QLA_TGT_MODE_ENABLED())
5841 return 0;
5842
5843 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5844 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5845 if (!ha->tgt.tgt_vp_map)
5846 return -ENOMEM;
5847
5848 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5849 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5850 &ha->tgt.atio_dma, GFP_KERNEL);
5851 if (!ha->tgt.atio_ring) {
5852 kfree(ha->tgt.tgt_vp_map);
5853 return -ENOMEM;
5854 }
5855 return 0;
5856 }
5857
5858 void
5859 qlt_mem_free(struct qla_hw_data *ha)
5860 {
5861 if (!QLA_TGT_MODE_ENABLED())
5862 return;
5863
5864 if (ha->tgt.atio_ring) {
5865 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5866 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5867 ha->tgt.atio_dma);
5868 }
5869 kfree(ha->tgt.tgt_vp_map);
5870 }
5871
5872 /* vport_slock to be held by the caller */
5873 void
5874 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5875 {
5876 if (!QLA_TGT_MODE_ENABLED())
5877 return;
5878
5879 switch (cmd) {
5880 case SET_VP_IDX:
5881 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5882 break;
5883 case SET_AL_PA:
5884 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5885 break;
5886 case RESET_VP_IDX:
5887 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5888 break;
5889 case RESET_AL_PA:
5890 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5891 break;
5892 }
5893 }
5894
5895 static int __init qlt_parse_ini_mode(void)
5896 {
5897 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5898 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5899 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5900 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5901 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5902 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5903 else
5904 return false;
5905
5906 return true;
5907 }
5908
5909 int __init qlt_init(void)
5910 {
5911 int ret;
5912
5913 if (!qlt_parse_ini_mode()) {
5914 ql_log(ql_log_fatal, NULL, 0xe06b,
5915 "qlt_parse_ini_mode() failed\n");
5916 return -EINVAL;
5917 }
5918
5919 if (!QLA_TGT_MODE_ENABLED())
5920 return 0;
5921
5922 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5923 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5924 qla_tgt_mgmt_cmd), 0, NULL);
5925 if (!qla_tgt_mgmt_cmd_cachep) {
5926 ql_log(ql_log_fatal, NULL, 0xe06d,
5927 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5928 return -ENOMEM;
5929 }
5930
5931 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5932 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5933 if (!qla_tgt_mgmt_cmd_mempool) {
5934 ql_log(ql_log_fatal, NULL, 0xe06e,
5935 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5936 ret = -ENOMEM;
5937 goto out_mgmt_cmd_cachep;
5938 }
5939
5940 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5941 if (!qla_tgt_wq) {
5942 ql_log(ql_log_fatal, NULL, 0xe06f,
5943 "alloc_workqueue for qla_tgt_wq failed\n");
5944 ret = -ENOMEM;
5945 goto out_cmd_mempool;
5946 }
5947 /*
5948 * Return 1 to signal that initiator-mode is being disabled
5949 */
5950 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5951
5952 out_cmd_mempool:
5953 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5954 out_mgmt_cmd_cachep:
5955 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5956 return ret;
5957 }
5958
5959 void qlt_exit(void)
5960 {
5961 if (!QLA_TGT_MODE_ENABLED())
5962 return;
5963
5964 destroy_workqueue(qla_tgt_wq);
5965 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5966 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5967 }
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