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qla2xxx: Remove __constant_ prefix
[GitHub/LineageOS/android_kernel_motorola_exynos9610.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 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 = 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 = 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 = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1166 CTIO7_FLAGS_TERMINATE);
1167 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1168
1169 /* Memory Barrier */
1170 wmb();
1171 qla2x00_start_iocbs(vha, vha->req);
1172
1173 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1174 FCP_TMF_CMPL, true);
1175 }
1176
1177 /* ha->hardware_lock supposed to be held on entry */
1178 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1179 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1180 {
1181 struct qla_hw_data *ha = vha->hw;
1182 struct se_session *se_sess = sess->se_sess;
1183 struct qla_tgt_mgmt_cmd *mcmd;
1184 struct se_cmd *se_cmd;
1185 u32 lun = 0;
1186 int rc;
1187 bool found_lun = false;
1188
1189 spin_lock(&se_sess->sess_cmd_lock);
1190 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1191 struct qla_tgt_cmd *cmd =
1192 container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1193 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1194 lun = cmd->unpacked_lun;
1195 found_lun = true;
1196 break;
1197 }
1198 }
1199 spin_unlock(&se_sess->sess_cmd_lock);
1200
1201 if (!found_lun)
1202 return -ENOENT;
1203
1204 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1205 "qla_target(%d): task abort (tag=%d)\n",
1206 vha->vp_idx, abts->exchange_addr_to_abort);
1207
1208 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1209 if (mcmd == NULL) {
1210 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1211 "qla_target(%d): %s: Allocation of ABORT cmd failed",
1212 vha->vp_idx, __func__);
1213 return -ENOMEM;
1214 }
1215 memset(mcmd, 0, sizeof(*mcmd));
1216
1217 mcmd->sess = sess;
1218 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1219 mcmd->reset_count = vha->hw->chip_reset;
1220
1221 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1222 abts->exchange_addr_to_abort);
1223 if (rc != 0) {
1224 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1225 "qla_target(%d): tgt_ops->handle_tmr()"
1226 " failed: %d", vha->vp_idx, rc);
1227 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1228 return -EFAULT;
1229 }
1230
1231 return 0;
1232 }
1233
1234 /*
1235 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1236 */
1237 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1238 struct abts_recv_from_24xx *abts)
1239 {
1240 struct qla_hw_data *ha = vha->hw;
1241 struct qla_tgt_sess *sess;
1242 uint32_t tag = abts->exchange_addr_to_abort;
1243 uint8_t s_id[3];
1244 int rc;
1245
1246 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1247 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1248 "qla_target(%d): ABTS: Abort Sequence not "
1249 "supported\n", vha->vp_idx);
1250 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1251 return;
1252 }
1253
1254 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1255 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1256 "qla_target(%d): ABTS: Unknown Exchange "
1257 "Address received\n", vha->vp_idx);
1258 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1259 return;
1260 }
1261
1262 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1263 "qla_target(%d): task abort (s_id=%x:%x:%x, "
1264 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1265 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1266 le32_to_cpu(abts->fcp_hdr_le.parameter));
1267
1268 s_id[0] = abts->fcp_hdr_le.s_id[2];
1269 s_id[1] = abts->fcp_hdr_le.s_id[1];
1270 s_id[2] = abts->fcp_hdr_le.s_id[0];
1271
1272 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1273 if (!sess) {
1274 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1275 "qla_target(%d): task abort for non-existant session\n",
1276 vha->vp_idx);
1277 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1278 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1279 if (rc != 0) {
1280 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1281 false);
1282 }
1283 return;
1284 }
1285
1286 rc = __qlt_24xx_handle_abts(vha, abts, sess);
1287 if (rc != 0) {
1288 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1289 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1290 vha->vp_idx, rc);
1291 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1292 return;
1293 }
1294 }
1295
1296 /*
1297 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1298 */
1299 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1300 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1301 {
1302 struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1303 struct ctio7_to_24xx *ctio;
1304 uint16_t temp;
1305
1306 ql_dbg(ql_dbg_tgt, ha, 0xe008,
1307 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1308 ha, atio, resp_code);
1309
1310 /* Send marker if required */
1311 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1312 return;
1313
1314 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1315 if (ctio == NULL) {
1316 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1317 "qla_target(%d): %s failed: unable to allocate "
1318 "request packet\n", ha->vp_idx, __func__);
1319 return;
1320 }
1321
1322 ctio->entry_type = CTIO_TYPE7;
1323 ctio->entry_count = 1;
1324 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1325 ctio->nport_handle = mcmd->sess->loop_id;
1326 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1327 ctio->vp_index = ha->vp_idx;
1328 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1329 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1330 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1331 ctio->exchange_addr = atio->u.isp24.exchange_addr;
1332 ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1333 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1334 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1335 ctio->u.status1.ox_id = cpu_to_le16(temp);
1336 ctio->u.status1.scsi_status =
1337 cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1338 ctio->u.status1.response_len = cpu_to_le16(8);
1339 ctio->u.status1.sense_data[0] = resp_code;
1340
1341 /* Memory Barrier */
1342 wmb();
1343 qla2x00_start_iocbs(ha, ha->req);
1344 }
1345
1346 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1347 {
1348 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1349 }
1350 EXPORT_SYMBOL(qlt_free_mcmd);
1351
1352 /* callback from target fabric module code */
1353 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1354 {
1355 struct scsi_qla_host *vha = mcmd->sess->vha;
1356 struct qla_hw_data *ha = vha->hw;
1357 unsigned long flags;
1358
1359 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1360 "TM response mcmd (%p) status %#x state %#x",
1361 mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1362
1363 spin_lock_irqsave(&ha->hardware_lock, flags);
1364
1365 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1366 /*
1367 * Either a chip reset is active or this request was from
1368 * previous life, just abort the processing.
1369 */
1370 ql_dbg(ql_dbg_async, vha, 0xe100,
1371 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1372 qla2x00_reset_active(vha), mcmd->reset_count,
1373 ha->chip_reset);
1374 ha->tgt.tgt_ops->free_mcmd(mcmd);
1375 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1376 return;
1377 }
1378
1379 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1380 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1381 0, 0, 0, 0, 0, 0);
1382 else {
1383 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1384 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1385 mcmd->fc_tm_rsp, false);
1386 else
1387 qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1388 mcmd->fc_tm_rsp);
1389 }
1390 /*
1391 * Make the callback for ->free_mcmd() to queue_work() and invoke
1392 * target_put_sess_cmd() to drop cmd_kref to 1. The final
1393 * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1394 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1395 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1396 * qlt_xmit_tm_rsp() returns here..
1397 */
1398 ha->tgt.tgt_ops->free_mcmd(mcmd);
1399 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1400 }
1401 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1402
1403 /* No locks */
1404 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1405 {
1406 struct qla_tgt_cmd *cmd = prm->cmd;
1407
1408 BUG_ON(cmd->sg_cnt == 0);
1409
1410 prm->sg = (struct scatterlist *)cmd->sg;
1411 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1412 cmd->sg_cnt, cmd->dma_data_direction);
1413 if (unlikely(prm->seg_cnt == 0))
1414 goto out_err;
1415
1416 prm->cmd->sg_mapped = 1;
1417
1418 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1419 /*
1420 * If greater than four sg entries then we need to allocate
1421 * the continuation entries
1422 */
1423 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1424 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1425 prm->tgt->datasegs_per_cmd,
1426 prm->tgt->datasegs_per_cont);
1427 } else {
1428 /* DIF */
1429 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1430 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1431 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1432 prm->tot_dsds = prm->seg_cnt;
1433 } else
1434 prm->tot_dsds = prm->seg_cnt;
1435
1436 if (cmd->prot_sg_cnt) {
1437 prm->prot_sg = cmd->prot_sg;
1438 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1439 cmd->prot_sg, cmd->prot_sg_cnt,
1440 cmd->dma_data_direction);
1441 if (unlikely(prm->prot_seg_cnt == 0))
1442 goto out_err;
1443
1444 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1445 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1446 /* Dif Bundling not support here */
1447 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1448 cmd->blk_sz);
1449 prm->tot_dsds += prm->prot_seg_cnt;
1450 } else
1451 prm->tot_dsds += prm->prot_seg_cnt;
1452 }
1453 }
1454
1455 return 0;
1456
1457 out_err:
1458 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1459 "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1460 0, prm->cmd->sg_cnt);
1461 return -1;
1462 }
1463
1464 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1465 {
1466 struct qla_hw_data *ha = vha->hw;
1467
1468 if (!cmd->sg_mapped)
1469 return;
1470
1471 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1472 cmd->sg_mapped = 0;
1473
1474 if (cmd->prot_sg_cnt)
1475 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1476 cmd->dma_data_direction);
1477
1478 if (cmd->ctx_dsd_alloced)
1479 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1480
1481 if (cmd->ctx)
1482 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1483 }
1484
1485 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1486 uint32_t req_cnt)
1487 {
1488 uint32_t cnt, cnt_in;
1489
1490 if (vha->req->cnt < (req_cnt + 2)) {
1491 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1492 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1493
1494 if (vha->req->ring_index < cnt)
1495 vha->req->cnt = cnt - vha->req->ring_index;
1496 else
1497 vha->req->cnt = vha->req->length -
1498 (vha->req->ring_index - cnt);
1499 }
1500
1501 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1502 ql_dbg(ql_dbg_io, vha, 0x305a,
1503 "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",
1504 vha->vp_idx, vha->req->ring_index,
1505 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1506 return -EAGAIN;
1507 }
1508 vha->req->cnt -= req_cnt;
1509
1510 return 0;
1511 }
1512
1513 /*
1514 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1515 */
1516 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1517 {
1518 /* Adjust ring index. */
1519 vha->req->ring_index++;
1520 if (vha->req->ring_index == vha->req->length) {
1521 vha->req->ring_index = 0;
1522 vha->req->ring_ptr = vha->req->ring;
1523 } else {
1524 vha->req->ring_ptr++;
1525 }
1526 return (cont_entry_t *)vha->req->ring_ptr;
1527 }
1528
1529 /* ha->hardware_lock supposed to be held on entry */
1530 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1531 {
1532 struct qla_hw_data *ha = vha->hw;
1533 uint32_t h;
1534
1535 h = ha->tgt.current_handle;
1536 /* always increment cmd handle */
1537 do {
1538 ++h;
1539 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1540 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1541 if (h == ha->tgt.current_handle) {
1542 ql_dbg(ql_dbg_io, vha, 0x305b,
1543 "qla_target(%d): Ran out of "
1544 "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1545 h = QLA_TGT_NULL_HANDLE;
1546 break;
1547 }
1548 } while ((h == QLA_TGT_NULL_HANDLE) ||
1549 (h == QLA_TGT_SKIP_HANDLE) ||
1550 (ha->tgt.cmds[h-1] != NULL));
1551
1552 if (h != QLA_TGT_NULL_HANDLE)
1553 ha->tgt.current_handle = h;
1554
1555 return h;
1556 }
1557
1558 /* ha->hardware_lock supposed to be held on entry */
1559 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1560 struct scsi_qla_host *vha)
1561 {
1562 uint32_t h;
1563 struct ctio7_to_24xx *pkt;
1564 struct qla_hw_data *ha = vha->hw;
1565 struct atio_from_isp *atio = &prm->cmd->atio;
1566 uint16_t temp;
1567
1568 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1569 prm->pkt = pkt;
1570 memset(pkt, 0, sizeof(*pkt));
1571
1572 pkt->entry_type = CTIO_TYPE7;
1573 pkt->entry_count = (uint8_t)prm->req_cnt;
1574 pkt->vp_index = vha->vp_idx;
1575
1576 h = qlt_make_handle(vha);
1577 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1578 /*
1579 * CTIO type 7 from the firmware doesn't provide a way to
1580 * know the initiator's LOOP ID, hence we can't find
1581 * the session and, so, the command.
1582 */
1583 return -EAGAIN;
1584 } else
1585 ha->tgt.cmds[h-1] = prm->cmd;
1586
1587 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1588 pkt->nport_handle = prm->cmd->loop_id;
1589 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1590 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1591 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1592 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1593 pkt->exchange_addr = atio->u.isp24.exchange_addr;
1594 pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1595 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1596 pkt->u.status0.ox_id = cpu_to_le16(temp);
1597 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1598
1599 return 0;
1600 }
1601
1602 /*
1603 * ha->hardware_lock supposed to be held on entry. We have already made sure
1604 * that there is sufficient amount of request entries to not drop it.
1605 */
1606 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1607 struct scsi_qla_host *vha)
1608 {
1609 int cnt;
1610 uint32_t *dword_ptr;
1611 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1612
1613 /* Build continuation packets */
1614 while (prm->seg_cnt > 0) {
1615 cont_a64_entry_t *cont_pkt64 =
1616 (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1617
1618 /*
1619 * Make sure that from cont_pkt64 none of
1620 * 64-bit specific fields used for 32-bit
1621 * addressing. Cast to (cont_entry_t *) for
1622 * that.
1623 */
1624
1625 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1626
1627 cont_pkt64->entry_count = 1;
1628 cont_pkt64->sys_define = 0;
1629
1630 if (enable_64bit_addressing) {
1631 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1632 dword_ptr =
1633 (uint32_t *)&cont_pkt64->dseg_0_address;
1634 } else {
1635 cont_pkt64->entry_type = CONTINUE_TYPE;
1636 dword_ptr =
1637 (uint32_t *)&((cont_entry_t *)
1638 cont_pkt64)->dseg_0_address;
1639 }
1640
1641 /* Load continuation entry data segments */
1642 for (cnt = 0;
1643 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1644 cnt++, prm->seg_cnt--) {
1645 *dword_ptr++ =
1646 cpu_to_le32(pci_dma_lo32
1647 (sg_dma_address(prm->sg)));
1648 if (enable_64bit_addressing) {
1649 *dword_ptr++ =
1650 cpu_to_le32(pci_dma_hi32
1651 (sg_dma_address
1652 (prm->sg)));
1653 }
1654 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1655
1656 prm->sg = sg_next(prm->sg);
1657 }
1658 }
1659 }
1660
1661 /*
1662 * ha->hardware_lock supposed to be held on entry. We have already made sure
1663 * that there is sufficient amount of request entries to not drop it.
1664 */
1665 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1666 struct scsi_qla_host *vha)
1667 {
1668 int cnt;
1669 uint32_t *dword_ptr;
1670 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1671 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1672
1673 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1674
1675 /* Setup packet address segment pointer */
1676 dword_ptr = pkt24->u.status0.dseg_0_address;
1677
1678 /* Set total data segment count */
1679 if (prm->seg_cnt)
1680 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1681
1682 if (prm->seg_cnt == 0) {
1683 /* No data transfer */
1684 *dword_ptr++ = 0;
1685 *dword_ptr = 0;
1686 return;
1687 }
1688
1689 /* If scatter gather */
1690
1691 /* Load command entry data segments */
1692 for (cnt = 0;
1693 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1694 cnt++, prm->seg_cnt--) {
1695 *dword_ptr++ =
1696 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1697 if (enable_64bit_addressing) {
1698 *dword_ptr++ =
1699 cpu_to_le32(pci_dma_hi32(
1700 sg_dma_address(prm->sg)));
1701 }
1702 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1703
1704 prm->sg = sg_next(prm->sg);
1705 }
1706
1707 qlt_load_cont_data_segments(prm, vha);
1708 }
1709
1710 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1711 {
1712 return cmd->bufflen > 0;
1713 }
1714
1715 /*
1716 * Called without ha->hardware_lock held
1717 */
1718 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1719 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1720 uint32_t *full_req_cnt)
1721 {
1722 struct qla_tgt *tgt = cmd->tgt;
1723 struct scsi_qla_host *vha = tgt->vha;
1724 struct qla_hw_data *ha = vha->hw;
1725 struct se_cmd *se_cmd = &cmd->se_cmd;
1726
1727 if (unlikely(cmd->aborted)) {
1728 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1729 "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)",
1730 vha->vp_idx, cmd, se_cmd, se_cmd->tag);
1731
1732 cmd->state = QLA_TGT_STATE_ABORTED;
1733 cmd->cmd_flags |= BIT_6;
1734
1735 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1736
1737 /* !! At this point cmd could be already freed !! */
1738 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1739 }
1740
1741 prm->cmd = cmd;
1742 prm->tgt = tgt;
1743 prm->rq_result = scsi_status;
1744 prm->sense_buffer = &cmd->sense_buffer[0];
1745 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1746 prm->sg = NULL;
1747 prm->seg_cnt = -1;
1748 prm->req_cnt = 1;
1749 prm->add_status_pkt = 0;
1750
1751 /* Send marker if required */
1752 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1753 return -EFAULT;
1754
1755 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1756 if (qlt_pci_map_calc_cnt(prm) != 0)
1757 return -EAGAIN;
1758 }
1759
1760 *full_req_cnt = prm->req_cnt;
1761
1762 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1763 prm->residual = se_cmd->residual_count;
1764 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1765 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1766 prm->residual, se_cmd->tag,
1767 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1768 cmd->bufflen, prm->rq_result);
1769 prm->rq_result |= SS_RESIDUAL_UNDER;
1770 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1771 prm->residual = se_cmd->residual_count;
1772 ql_dbg(ql_dbg_io, vha, 0x305d,
1773 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1774 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1775 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1776 prm->rq_result |= SS_RESIDUAL_OVER;
1777 }
1778
1779 if (xmit_type & QLA_TGT_XMIT_STATUS) {
1780 /*
1781 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1782 * ignored in *xmit_response() below
1783 */
1784 if (qlt_has_data(cmd)) {
1785 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1786 (IS_FWI2_CAPABLE(ha) &&
1787 (prm->rq_result != 0))) {
1788 prm->add_status_pkt = 1;
1789 (*full_req_cnt)++;
1790 }
1791 }
1792 }
1793
1794 return 0;
1795 }
1796
1797 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1798 struct qla_tgt_cmd *cmd, int sending_sense)
1799 {
1800 if (ha->tgt.enable_class_2)
1801 return 0;
1802
1803 if (sending_sense)
1804 return cmd->conf_compl_supported;
1805 else
1806 return ha->tgt.enable_explicit_conf &&
1807 cmd->conf_compl_supported;
1808 }
1809
1810 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1811 /*
1812 * Original taken from the XFS code
1813 */
1814 static unsigned long qlt_srr_random(void)
1815 {
1816 static int Inited;
1817 static unsigned long RandomValue;
1818 static DEFINE_SPINLOCK(lock);
1819 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1820 register long rv;
1821 register long lo;
1822 register long hi;
1823 unsigned long flags;
1824
1825 spin_lock_irqsave(&lock, flags);
1826 if (!Inited) {
1827 RandomValue = jiffies;
1828 Inited = 1;
1829 }
1830 rv = RandomValue;
1831 hi = rv / 127773;
1832 lo = rv % 127773;
1833 rv = 16807 * lo - 2836 * hi;
1834 if (rv <= 0)
1835 rv += 2147483647;
1836 RandomValue = rv;
1837 spin_unlock_irqrestore(&lock, flags);
1838 return rv;
1839 }
1840
1841 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1842 {
1843 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1844 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1845 == 50) {
1846 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1847 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1848 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
1849 }
1850 #endif
1851 /*
1852 * It's currently not possible to simulate SRRs for FCP_WRITE without
1853 * a physical link layer failure, so don't even try here..
1854 */
1855 if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1856 return;
1857
1858 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1859 ((qlt_srr_random() % 100) == 20)) {
1860 int i, leave = 0;
1861 unsigned int tot_len = 0;
1862
1863 while (leave == 0)
1864 leave = qlt_srr_random() % cmd->sg_cnt;
1865
1866 for (i = 0; i < leave; i++)
1867 tot_len += cmd->sg[i].length;
1868
1869 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1870 "Cutting cmd %p (tag %d) buffer"
1871 " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1872 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
1873 cmd->bufflen, cmd->sg_cnt);
1874
1875 cmd->bufflen = tot_len;
1876 cmd->sg_cnt = leave;
1877 }
1878
1879 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1880 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1881
1882 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1883 "Cutting cmd %p (tag %d) buffer head "
1884 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
1885 cmd->bufflen);
1886 if (offset == 0)
1887 *xmit_type &= ~QLA_TGT_XMIT_DATA;
1888 else if (qlt_set_data_offset(cmd, offset)) {
1889 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1890 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
1891 }
1892 }
1893 }
1894 #else
1895 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1896 {}
1897 #endif
1898
1899 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1900 struct qla_tgt_prm *prm)
1901 {
1902 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1903 (uint32_t)sizeof(ctio->u.status1.sense_data));
1904 ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1905 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1906 ctio->u.status0.flags |= cpu_to_le16(
1907 CTIO7_FLAGS_EXPLICIT_CONFORM |
1908 CTIO7_FLAGS_CONFORM_REQ);
1909 }
1910 ctio->u.status0.residual = cpu_to_le32(prm->residual);
1911 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1912 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1913 int i;
1914
1915 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1916 if (prm->cmd->se_cmd.scsi_status != 0) {
1917 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1918 "Skipping EXPLICIT_CONFORM and "
1919 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1920 "non GOOD status\n");
1921 goto skip_explict_conf;
1922 }
1923 ctio->u.status1.flags |= cpu_to_le16(
1924 CTIO7_FLAGS_EXPLICIT_CONFORM |
1925 CTIO7_FLAGS_CONFORM_REQ);
1926 }
1927 skip_explict_conf:
1928 ctio->u.status1.flags &=
1929 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1930 ctio->u.status1.flags |=
1931 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1932 ctio->u.status1.scsi_status |=
1933 cpu_to_le16(SS_SENSE_LEN_VALID);
1934 ctio->u.status1.sense_length =
1935 cpu_to_le16(prm->sense_buffer_len);
1936 for (i = 0; i < prm->sense_buffer_len/4; i++)
1937 ((uint32_t *)ctio->u.status1.sense_data)[i] =
1938 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1939 #if 0
1940 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1941 static int q;
1942 if (q < 10) {
1943 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1944 "qla_target(%d): %d bytes of sense "
1945 "lost", prm->tgt->ha->vp_idx,
1946 prm->sense_buffer_len % 4);
1947 q++;
1948 }
1949 }
1950 #endif
1951 } else {
1952 ctio->u.status1.flags &=
1953 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1954 ctio->u.status1.flags |=
1955 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1956 ctio->u.status1.sense_length = 0;
1957 memset(ctio->u.status1.sense_data, 0,
1958 sizeof(ctio->u.status1.sense_data));
1959 }
1960
1961 /* Sense with len > 24, is it possible ??? */
1962 }
1963
1964
1965
1966 /* diff */
1967 static inline int
1968 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1969 {
1970 /*
1971 * Uncomment when corresponding SCSI changes are done.
1972 *
1973 if (!sp->cmd->prot_chk)
1974 return 0;
1975 *
1976 */
1977 switch (se_cmd->prot_op) {
1978 case TARGET_PROT_DOUT_INSERT:
1979 case TARGET_PROT_DIN_STRIP:
1980 if (ql2xenablehba_err_chk >= 1)
1981 return 1;
1982 break;
1983 case TARGET_PROT_DOUT_PASS:
1984 case TARGET_PROT_DIN_PASS:
1985 if (ql2xenablehba_err_chk >= 2)
1986 return 1;
1987 break;
1988 case TARGET_PROT_DIN_INSERT:
1989 case TARGET_PROT_DOUT_STRIP:
1990 return 1;
1991 default:
1992 break;
1993 }
1994 return 0;
1995 }
1996
1997 /*
1998 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
1999 *
2000 */
2001 static inline void
2002 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2003 {
2004 uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2005
2006 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2007 * have been immplemented by TCM, before AppTag is avail.
2008 * Look for modesense_handlers[]
2009 */
2010 ctx->app_tag = 0;
2011 ctx->app_tag_mask[0] = 0x0;
2012 ctx->app_tag_mask[1] = 0x0;
2013
2014 switch (se_cmd->prot_type) {
2015 case TARGET_DIF_TYPE0_PROT:
2016 /*
2017 * No check for ql2xenablehba_err_chk, as it would be an
2018 * I/O error if hba tag generation is not done.
2019 */
2020 ctx->ref_tag = cpu_to_le32(lba);
2021
2022 if (!qlt_hba_err_chk_enabled(se_cmd))
2023 break;
2024
2025 /* enable ALL bytes of the ref tag */
2026 ctx->ref_tag_mask[0] = 0xff;
2027 ctx->ref_tag_mask[1] = 0xff;
2028 ctx->ref_tag_mask[2] = 0xff;
2029 ctx->ref_tag_mask[3] = 0xff;
2030 break;
2031 /*
2032 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2033 * 16 bit app tag.
2034 */
2035 case TARGET_DIF_TYPE1_PROT:
2036 ctx->ref_tag = cpu_to_le32(lba);
2037
2038 if (!qlt_hba_err_chk_enabled(se_cmd))
2039 break;
2040
2041 /* enable ALL bytes of the ref tag */
2042 ctx->ref_tag_mask[0] = 0xff;
2043 ctx->ref_tag_mask[1] = 0xff;
2044 ctx->ref_tag_mask[2] = 0xff;
2045 ctx->ref_tag_mask[3] = 0xff;
2046 break;
2047 /*
2048 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2049 * match LBA in CDB + N
2050 */
2051 case TARGET_DIF_TYPE2_PROT:
2052 ctx->ref_tag = cpu_to_le32(lba);
2053
2054 if (!qlt_hba_err_chk_enabled(se_cmd))
2055 break;
2056
2057 /* enable ALL bytes of the ref tag */
2058 ctx->ref_tag_mask[0] = 0xff;
2059 ctx->ref_tag_mask[1] = 0xff;
2060 ctx->ref_tag_mask[2] = 0xff;
2061 ctx->ref_tag_mask[3] = 0xff;
2062 break;
2063
2064 /* For Type 3 protection: 16 bit GUARD only */
2065 case TARGET_DIF_TYPE3_PROT:
2066 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2067 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2068 break;
2069 }
2070 }
2071
2072
2073 static inline int
2074 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2075 {
2076 uint32_t *cur_dsd;
2077 uint32_t transfer_length = 0;
2078 uint32_t data_bytes;
2079 uint32_t dif_bytes;
2080 uint8_t bundling = 1;
2081 uint8_t *clr_ptr;
2082 struct crc_context *crc_ctx_pkt = NULL;
2083 struct qla_hw_data *ha;
2084 struct ctio_crc2_to_fw *pkt;
2085 dma_addr_t crc_ctx_dma;
2086 uint16_t fw_prot_opts = 0;
2087 struct qla_tgt_cmd *cmd = prm->cmd;
2088 struct se_cmd *se_cmd = &cmd->se_cmd;
2089 uint32_t h;
2090 struct atio_from_isp *atio = &prm->cmd->atio;
2091 uint16_t t16;
2092
2093 ha = vha->hw;
2094
2095 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2096 prm->pkt = pkt;
2097 memset(pkt, 0, sizeof(*pkt));
2098
2099 ql_dbg(ql_dbg_tgt, vha, 0xe071,
2100 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2101 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2102 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2103
2104 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2105 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2106 bundling = 0;
2107
2108 /* Compute dif len and adjust data len to incude protection */
2109 data_bytes = cmd->bufflen;
2110 dif_bytes = (data_bytes / cmd->blk_sz) * 8;
2111
2112 switch (se_cmd->prot_op) {
2113 case TARGET_PROT_DIN_INSERT:
2114 case TARGET_PROT_DOUT_STRIP:
2115 transfer_length = data_bytes;
2116 data_bytes += dif_bytes;
2117 break;
2118
2119 case TARGET_PROT_DIN_STRIP:
2120 case TARGET_PROT_DOUT_INSERT:
2121 case TARGET_PROT_DIN_PASS:
2122 case TARGET_PROT_DOUT_PASS:
2123 transfer_length = data_bytes + dif_bytes;
2124 break;
2125
2126 default:
2127 BUG();
2128 break;
2129 }
2130
2131 if (!qlt_hba_err_chk_enabled(se_cmd))
2132 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2133 /* HBA error checking enabled */
2134 else if (IS_PI_UNINIT_CAPABLE(ha)) {
2135 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2136 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2137 fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2138 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2139 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2140 }
2141
2142 switch (se_cmd->prot_op) {
2143 case TARGET_PROT_DIN_INSERT:
2144 case TARGET_PROT_DOUT_INSERT:
2145 fw_prot_opts |= PO_MODE_DIF_INSERT;
2146 break;
2147 case TARGET_PROT_DIN_STRIP:
2148 case TARGET_PROT_DOUT_STRIP:
2149 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2150 break;
2151 case TARGET_PROT_DIN_PASS:
2152 case TARGET_PROT_DOUT_PASS:
2153 fw_prot_opts |= PO_MODE_DIF_PASS;
2154 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2155 break;
2156 default:/* Normal Request */
2157 fw_prot_opts |= PO_MODE_DIF_PASS;
2158 break;
2159 }
2160
2161
2162 /* ---- PKT ---- */
2163 /* Update entry type to indicate Command Type CRC_2 IOCB */
2164 pkt->entry_type = CTIO_CRC2;
2165 pkt->entry_count = 1;
2166 pkt->vp_index = vha->vp_idx;
2167
2168 h = qlt_make_handle(vha);
2169 if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2170 /*
2171 * CTIO type 7 from the firmware doesn't provide a way to
2172 * know the initiator's LOOP ID, hence we can't find
2173 * the session and, so, the command.
2174 */
2175 return -EAGAIN;
2176 } else
2177 ha->tgt.cmds[h-1] = prm->cmd;
2178
2179
2180 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2181 pkt->nport_handle = prm->cmd->loop_id;
2182 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2183 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2184 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2185 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2186 pkt->exchange_addr = atio->u.isp24.exchange_addr;
2187
2188 /* silence compile warning */
2189 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2190 pkt->ox_id = cpu_to_le16(t16);
2191
2192 t16 = (atio->u.isp24.attr << 9);
2193 pkt->flags |= cpu_to_le16(t16);
2194 pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2195
2196 /* Set transfer direction */
2197 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2198 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2199 else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2200 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2201
2202
2203 pkt->dseg_count = prm->tot_dsds;
2204 /* Fibre channel byte count */
2205 pkt->transfer_length = cpu_to_le32(transfer_length);
2206
2207
2208 /* ----- CRC context -------- */
2209
2210 /* Allocate CRC context from global pool */
2211 crc_ctx_pkt = cmd->ctx =
2212 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2213
2214 if (!crc_ctx_pkt)
2215 goto crc_queuing_error;
2216
2217 /* Zero out CTX area. */
2218 clr_ptr = (uint8_t *)crc_ctx_pkt;
2219 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2220
2221 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2222 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2223
2224 /* Set handle */
2225 crc_ctx_pkt->handle = pkt->handle;
2226
2227 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2228
2229 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2230 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2231 pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2232
2233
2234 if (!bundling) {
2235 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2236 } else {
2237 /*
2238 * Configure Bundling if we need to fetch interlaving
2239 * protection PCI accesses
2240 */
2241 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2242 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2243 crc_ctx_pkt->u.bundling.dseg_count =
2244 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2245 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2246 }
2247
2248 /* Finish the common fields of CRC pkt */
2249 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz);
2250 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
2251 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2252 crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2253
2254
2255 /* Walks data segments */
2256 pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2257
2258 if (!bundling && prm->prot_seg_cnt) {
2259 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2260 prm->tot_dsds, cmd))
2261 goto crc_queuing_error;
2262 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2263 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2264 goto crc_queuing_error;
2265
2266 if (bundling && prm->prot_seg_cnt) {
2267 /* Walks dif segments */
2268 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2269
2270 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2271 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2272 prm->prot_seg_cnt, cmd))
2273 goto crc_queuing_error;
2274 }
2275 return QLA_SUCCESS;
2276
2277 crc_queuing_error:
2278 /* Cleanup will be performed by the caller */
2279
2280 return QLA_FUNCTION_FAILED;
2281 }
2282
2283
2284 /*
2285 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2286 * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2287 */
2288 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2289 uint8_t scsi_status)
2290 {
2291 struct scsi_qla_host *vha = cmd->vha;
2292 struct qla_hw_data *ha = vha->hw;
2293 struct ctio7_to_24xx *pkt;
2294 struct qla_tgt_prm prm;
2295 uint32_t full_req_cnt = 0;
2296 unsigned long flags = 0;
2297 int res;
2298
2299 memset(&prm, 0, sizeof(prm));
2300 qlt_check_srr_debug(cmd, &xmit_type);
2301
2302 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2303 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2304 (xmit_type & QLA_TGT_XMIT_STATUS) ?
2305 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2306 &cmd->se_cmd);
2307
2308 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2309 &full_req_cnt);
2310 if (unlikely(res != 0)) {
2311 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2312 return 0;
2313
2314 return res;
2315 }
2316
2317 spin_lock_irqsave(&ha->hardware_lock, flags);
2318
2319 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2320 /*
2321 * Either a chip reset is active or this request was from
2322 * previous life, just abort the processing.
2323 */
2324 cmd->state = QLA_TGT_STATE_PROCESSED;
2325 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2326 ql_dbg(ql_dbg_async, vha, 0xe101,
2327 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2328 qla2x00_reset_active(vha), cmd->reset_count,
2329 ha->chip_reset);
2330 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2331 return 0;
2332 }
2333
2334 /* Does F/W have an IOCBs for this request */
2335 res = qlt_check_reserve_free_req(vha, full_req_cnt);
2336 if (unlikely(res))
2337 goto out_unmap_unlock;
2338
2339 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2340 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2341 else
2342 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2343 if (unlikely(res != 0))
2344 goto out_unmap_unlock;
2345
2346
2347 pkt = (struct ctio7_to_24xx *)prm.pkt;
2348
2349 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2350 pkt->u.status0.flags |=
2351 cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2352 CTIO7_FLAGS_STATUS_MODE_0);
2353
2354 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2355 qlt_load_data_segments(&prm, vha);
2356
2357 if (prm.add_status_pkt == 0) {
2358 if (xmit_type & QLA_TGT_XMIT_STATUS) {
2359 pkt->u.status0.scsi_status =
2360 cpu_to_le16(prm.rq_result);
2361 pkt->u.status0.residual =
2362 cpu_to_le32(prm.residual);
2363 pkt->u.status0.flags |= cpu_to_le16(
2364 CTIO7_FLAGS_SEND_STATUS);
2365 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2366 pkt->u.status0.flags |=
2367 cpu_to_le16(
2368 CTIO7_FLAGS_EXPLICIT_CONFORM |
2369 CTIO7_FLAGS_CONFORM_REQ);
2370 }
2371 }
2372
2373 } else {
2374 /*
2375 * We have already made sure that there is sufficient
2376 * amount of request entries to not drop HW lock in
2377 * req_pkt().
2378 */
2379 struct ctio7_to_24xx *ctio =
2380 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2381
2382 ql_dbg(ql_dbg_io, vha, 0x305e,
2383 "Building additional status packet 0x%p.\n",
2384 ctio);
2385
2386 /*
2387 * T10Dif: ctio_crc2_to_fw overlay ontop of
2388 * ctio7_to_24xx
2389 */
2390 memcpy(ctio, pkt, sizeof(*ctio));
2391 /* reset back to CTIO7 */
2392 ctio->entry_count = 1;
2393 ctio->entry_type = CTIO_TYPE7;
2394 ctio->dseg_count = 0;
2395 ctio->u.status1.flags &= ~cpu_to_le16(
2396 CTIO7_FLAGS_DATA_IN);
2397
2398 /* Real finish is ctio_m1's finish */
2399 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2400 pkt->u.status0.flags |= cpu_to_le16(
2401 CTIO7_FLAGS_DONT_RET_CTIO);
2402
2403 /* qlt_24xx_init_ctio_to_isp will correct
2404 * all neccessary fields that's part of CTIO7.
2405 * There should be no residual of CTIO-CRC2 data.
2406 */
2407 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2408 &prm);
2409 pr_debug("Status CTIO7: %p\n", ctio);
2410 }
2411 } else
2412 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2413
2414
2415 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2416 cmd->cmd_sent_to_fw = 1;
2417
2418 /* Memory Barrier */
2419 wmb();
2420 qla2x00_start_iocbs(vha, vha->req);
2421 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2422
2423 return 0;
2424
2425 out_unmap_unlock:
2426 qlt_unmap_sg(vha, cmd);
2427 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2428
2429 return res;
2430 }
2431 EXPORT_SYMBOL(qlt_xmit_response);
2432
2433 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2434 {
2435 struct ctio7_to_24xx *pkt;
2436 struct scsi_qla_host *vha = cmd->vha;
2437 struct qla_hw_data *ha = vha->hw;
2438 struct qla_tgt *tgt = cmd->tgt;
2439 struct qla_tgt_prm prm;
2440 unsigned long flags;
2441 int res = 0;
2442
2443 memset(&prm, 0, sizeof(prm));
2444 prm.cmd = cmd;
2445 prm.tgt = tgt;
2446 prm.sg = NULL;
2447 prm.req_cnt = 1;
2448
2449 /* Send marker if required */
2450 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2451 return -EIO;
2452
2453 /* Calculate number of entries and segments required */
2454 if (qlt_pci_map_calc_cnt(&prm) != 0)
2455 return -EAGAIN;
2456
2457 spin_lock_irqsave(&ha->hardware_lock, flags);
2458
2459 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2460 /*
2461 * Either a chip reset is active or this request was from
2462 * previous life, just abort the processing.
2463 */
2464 cmd->state = QLA_TGT_STATE_NEED_DATA;
2465 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2466 ql_dbg(ql_dbg_async, vha, 0xe102,
2467 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2468 qla2x00_reset_active(vha), cmd->reset_count,
2469 ha->chip_reset);
2470 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2471 return 0;
2472 }
2473
2474 /* Does F/W have an IOCBs for this request */
2475 res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2476 if (res != 0)
2477 goto out_unlock_free_unmap;
2478 if (cmd->se_cmd.prot_op)
2479 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2480 else
2481 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2482
2483 if (unlikely(res != 0))
2484 goto out_unlock_free_unmap;
2485 pkt = (struct ctio7_to_24xx *)prm.pkt;
2486 pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2487 CTIO7_FLAGS_STATUS_MODE_0);
2488
2489 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2490 qlt_load_data_segments(&prm, vha);
2491
2492 cmd->state = QLA_TGT_STATE_NEED_DATA;
2493 cmd->cmd_sent_to_fw = 1;
2494
2495 /* Memory Barrier */
2496 wmb();
2497 qla2x00_start_iocbs(vha, vha->req);
2498 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2499
2500 return res;
2501
2502 out_unlock_free_unmap:
2503 qlt_unmap_sg(vha, cmd);
2504 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2505
2506 return res;
2507 }
2508 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2509
2510
2511 /*
2512 * Checks the guard or meta-data for the type of error
2513 * detected by the HBA.
2514 */
2515 static inline int
2516 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2517 struct ctio_crc_from_fw *sts)
2518 {
2519 uint8_t *ap = &sts->actual_dif[0];
2520 uint8_t *ep = &sts->expected_dif[0];
2521 uint32_t e_ref_tag, a_ref_tag;
2522 uint16_t e_app_tag, a_app_tag;
2523 uint16_t e_guard, a_guard;
2524 uint64_t lba = cmd->se_cmd.t_task_lba;
2525
2526 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0));
2527 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2528 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2529
2530 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0));
2531 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2532 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2533
2534 ql_dbg(ql_dbg_tgt, vha, 0xe075,
2535 "iocb(s) %p Returned STATUS.\n", sts);
2536
2537 ql_dbg(ql_dbg_tgt, vha, 0xf075,
2538 "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",
2539 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2540 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2541
2542 /*
2543 * Ignore sector if:
2544 * For type 3: ref & app tag is all 'f's
2545 * For type 0,1,2: app tag is all 'f's
2546 */
2547 if ((a_app_tag == 0xffff) &&
2548 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2549 (a_ref_tag == 0xffffffff))) {
2550 uint32_t blocks_done;
2551
2552 /* 2TB boundary case covered automatically with this */
2553 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2554 cmd->se_cmd.bad_sector = e_ref_tag;
2555 cmd->se_cmd.pi_err = 0;
2556 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2557 "need to return scsi good\n");
2558
2559 /* Update protection tag */
2560 if (cmd->prot_sg_cnt) {
2561 uint32_t i, k = 0, num_ent;
2562 struct scatterlist *sg, *sgl;
2563
2564
2565 sgl = cmd->prot_sg;
2566
2567 /* Patch the corresponding protection tags */
2568 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2569 num_ent = sg_dma_len(sg) / 8;
2570 if (k + num_ent < blocks_done) {
2571 k += num_ent;
2572 continue;
2573 }
2574 k = blocks_done;
2575 break;
2576 }
2577
2578 if (k != blocks_done) {
2579 ql_log(ql_log_warn, vha, 0xf076,
2580 "unexpected tag values tag:lba=%u:%llu)\n",
2581 e_ref_tag, (unsigned long long)lba);
2582 goto out;
2583 }
2584
2585 #if 0
2586 struct sd_dif_tuple *spt;
2587 /* TODO:
2588 * This section came from initiator. Is it valid here?
2589 * should ulp be override with actual val???
2590 */
2591 spt = page_address(sg_page(sg)) + sg->offset;
2592 spt += j;
2593
2594 spt->app_tag = 0xffff;
2595 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2596 spt->ref_tag = 0xffffffff;
2597 #endif
2598 }
2599
2600 return 0;
2601 }
2602
2603 /* check guard */
2604 if (e_guard != a_guard) {
2605 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2606 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2607
2608 ql_log(ql_log_warn, vha, 0xe076,
2609 "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",
2610 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2611 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2612 a_guard, e_guard, cmd);
2613 goto out;
2614 }
2615
2616 /* check ref tag */
2617 if (e_ref_tag != a_ref_tag) {
2618 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2619 cmd->se_cmd.bad_sector = e_ref_tag;
2620
2621 ql_log(ql_log_warn, vha, 0xe077,
2622 "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",
2623 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2624 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2625 a_guard, e_guard, cmd);
2626 goto out;
2627 }
2628
2629 /* check appl tag */
2630 if (e_app_tag != a_app_tag) {
2631 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2632 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2633
2634 ql_log(ql_log_warn, vha, 0xe078,
2635 "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",
2636 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2637 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2638 a_guard, e_guard, cmd);
2639 goto out;
2640 }
2641 out:
2642 return 1;
2643 }
2644
2645
2646 /* If hardware_lock held on entry, might drop it, then reaquire */
2647 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2648 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2649 struct qla_tgt_cmd *cmd,
2650 struct atio_from_isp *atio)
2651 {
2652 struct ctio7_to_24xx *ctio24;
2653 struct qla_hw_data *ha = vha->hw;
2654 request_t *pkt;
2655 int ret = 0;
2656 uint16_t temp;
2657
2658 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2659
2660 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2661 if (pkt == NULL) {
2662 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2663 "qla_target(%d): %s failed: unable to allocate "
2664 "request packet\n", vha->vp_idx, __func__);
2665 return -ENOMEM;
2666 }
2667
2668 if (cmd != NULL) {
2669 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2670 ql_dbg(ql_dbg_tgt, vha, 0xe051,
2671 "qla_target(%d): Terminating cmd %p with "
2672 "incorrect state %d\n", vha->vp_idx, cmd,
2673 cmd->state);
2674 } else
2675 ret = 1;
2676 }
2677
2678 pkt->entry_count = 1;
2679 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2680
2681 ctio24 = (struct ctio7_to_24xx *)pkt;
2682 ctio24->entry_type = CTIO_TYPE7;
2683 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2684 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2685 ctio24->vp_index = vha->vp_idx;
2686 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2687 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2688 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2689 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2690 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2691 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2692 CTIO7_FLAGS_TERMINATE);
2693 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2694 ctio24->u.status1.ox_id = cpu_to_le16(temp);
2695
2696 /* Most likely, it isn't needed */
2697 ctio24->u.status1.residual = get_unaligned((uint32_t *)
2698 &atio->u.isp24.fcp_cmnd.add_cdb[
2699 atio->u.isp24.fcp_cmnd.add_cdb_len]);
2700 if (ctio24->u.status1.residual != 0)
2701 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2702
2703 /* Memory Barrier */
2704 wmb();
2705 qla2x00_start_iocbs(vha, vha->req);
2706 return ret;
2707 }
2708
2709 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2710 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2711 {
2712 unsigned long flags;
2713 int rc;
2714
2715 if (qlt_issue_marker(vha, ha_locked) < 0)
2716 return;
2717
2718 if (ha_locked) {
2719 rc = __qlt_send_term_exchange(vha, cmd, atio);
2720 if (rc == -ENOMEM)
2721 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2722 goto done;
2723 }
2724 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2725 rc = __qlt_send_term_exchange(vha, cmd, atio);
2726 if (rc == -ENOMEM)
2727 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2728 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2729
2730 done:
2731 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2732 !cmd->cmd_sent_to_fw)) {
2733 if (!ha_locked && !in_interrupt())
2734 msleep(250); /* just in case */
2735
2736 qlt_unmap_sg(vha, cmd);
2737 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2738 }
2739 return;
2740 }
2741
2742 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2743 {
2744 struct list_head free_list;
2745 struct qla_tgt_cmd *cmd, *tcmd;
2746
2747 vha->hw->tgt.leak_exchg_thresh_hold =
2748 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2749
2750 cmd = tcmd = NULL;
2751 if (!list_empty(&vha->hw->tgt.q_full_list)) {
2752 INIT_LIST_HEAD(&free_list);
2753 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2754
2755 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2756 list_del(&cmd->cmd_list);
2757 /* This cmd was never sent to TCM. There is no need
2758 * to schedule free or call free_cmd
2759 */
2760 qlt_free_cmd(cmd);
2761 vha->hw->tgt.num_qfull_cmds_alloc--;
2762 }
2763 }
2764 vha->hw->tgt.num_qfull_cmds_dropped = 0;
2765 }
2766
2767 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2768 {
2769 uint32_t total_leaked;
2770
2771 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2772
2773 if (vha->hw->tgt.leak_exchg_thresh_hold &&
2774 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2775
2776 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2777 "Chip reset due to exchange starvation: %d/%d.\n",
2778 total_leaked, vha->hw->fw_xcb_count);
2779
2780 if (IS_P3P_TYPE(vha->hw))
2781 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2782 else
2783 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2784 qla2xxx_wake_dpc(vha);
2785 }
2786
2787 }
2788
2789 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2790 {
2791 struct qla_tgt_sess *sess = cmd->sess;
2792
2793 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2794 "%s: se_cmd[%p] ox_id %04x\n",
2795 __func__, &cmd->se_cmd,
2796 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2797
2798 BUG_ON(cmd->cmd_in_wq);
2799
2800 if (!cmd->q_full)
2801 qlt_decr_num_pend_cmds(cmd->vha);
2802
2803 BUG_ON(cmd->sg_mapped);
2804 cmd->jiffies_at_free = get_jiffies_64();
2805 if (unlikely(cmd->free_sg))
2806 kfree(cmd->sg);
2807
2808 if (!sess || !sess->se_sess) {
2809 WARN_ON(1);
2810 return;
2811 }
2812 cmd->jiffies_at_free = get_jiffies_64();
2813 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2814 }
2815 EXPORT_SYMBOL(qlt_free_cmd);
2816
2817 /* ha->hardware_lock supposed to be held on entry */
2818 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2819 struct qla_tgt_cmd *cmd, void *ctio)
2820 {
2821 struct qla_tgt_srr_ctio *sc;
2822 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2823 struct qla_tgt_srr_imm *imm;
2824
2825 tgt->ctio_srr_id++;
2826 cmd->cmd_flags |= BIT_15;
2827
2828 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2829 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2830
2831 if (!ctio) {
2832 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2833 "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2834 vha->vp_idx);
2835 return -EINVAL;
2836 }
2837
2838 sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2839 if (sc != NULL) {
2840 sc->cmd = cmd;
2841 /* IRQ is already OFF */
2842 spin_lock(&tgt->srr_lock);
2843 sc->srr_id = tgt->ctio_srr_id;
2844 list_add_tail(&sc->srr_list_entry,
2845 &tgt->srr_ctio_list);
2846 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2847 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2848 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2849 int found = 0;
2850 list_for_each_entry(imm, &tgt->srr_imm_list,
2851 srr_list_entry) {
2852 if (imm->srr_id == sc->srr_id) {
2853 found = 1;
2854 break;
2855 }
2856 }
2857 if (found) {
2858 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2859 "Scheduling srr work\n");
2860 schedule_work(&tgt->srr_work);
2861 } else {
2862 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2863 "qla_target(%d): imm_srr_id "
2864 "== ctio_srr_id (%d), but there is no "
2865 "corresponding SRR IMM, deleting CTIO "
2866 "SRR %p\n", vha->vp_idx,
2867 tgt->ctio_srr_id, sc);
2868 list_del(&sc->srr_list_entry);
2869 spin_unlock(&tgt->srr_lock);
2870
2871 kfree(sc);
2872 return -EINVAL;
2873 }
2874 }
2875 spin_unlock(&tgt->srr_lock);
2876 } else {
2877 struct qla_tgt_srr_imm *ti;
2878
2879 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2880 "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2881 vha->vp_idx);
2882 spin_lock(&tgt->srr_lock);
2883 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2884 srr_list_entry) {
2885 if (imm->srr_id == tgt->ctio_srr_id) {
2886 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2887 "IMM SRR %p deleted (id %d)\n",
2888 imm, imm->srr_id);
2889 list_del(&imm->srr_list_entry);
2890 qlt_reject_free_srr_imm(vha, imm, 1);
2891 }
2892 }
2893 spin_unlock(&tgt->srr_lock);
2894
2895 return -ENOMEM;
2896 }
2897
2898 return 0;
2899 }
2900
2901 /*
2902 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2903 */
2904 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2905 struct qla_tgt_cmd *cmd, uint32_t status)
2906 {
2907 int term = 0;
2908
2909 if (ctio != NULL) {
2910 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2911 term = !(c->flags &
2912 cpu_to_le16(OF_TERM_EXCH));
2913 } else
2914 term = 1;
2915
2916 if (term)
2917 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2918
2919 return term;
2920 }
2921
2922 /* ha->hardware_lock supposed to be held on entry */
2923 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2924 uint32_t handle)
2925 {
2926 struct qla_hw_data *ha = vha->hw;
2927
2928 handle--;
2929 if (ha->tgt.cmds[handle] != NULL) {
2930 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2931 ha->tgt.cmds[handle] = NULL;
2932 return cmd;
2933 } else
2934 return NULL;
2935 }
2936
2937 /* ha->hardware_lock supposed to be held on entry */
2938 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2939 uint32_t handle, void *ctio)
2940 {
2941 struct qla_tgt_cmd *cmd = NULL;
2942
2943 /* Clear out internal marks */
2944 handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2945 CTIO_INTERMEDIATE_HANDLE_MARK);
2946
2947 if (handle != QLA_TGT_NULL_HANDLE) {
2948 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2949 return NULL;
2950
2951 /* handle-1 is actually used */
2952 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2953 ql_dbg(ql_dbg_tgt, vha, 0xe052,
2954 "qla_target(%d): Wrong handle %x received\n",
2955 vha->vp_idx, handle);
2956 return NULL;
2957 }
2958 cmd = qlt_get_cmd(vha, handle);
2959 if (unlikely(cmd == NULL)) {
2960 ql_dbg(ql_dbg_tgt, vha, 0xe053,
2961 "qla_target(%d): Suspicious: unable to "
2962 "find the command with handle %x\n", vha->vp_idx,
2963 handle);
2964 return NULL;
2965 }
2966 } else if (ctio != NULL) {
2967 /* We can't get loop ID from CTIO7 */
2968 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2969 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2970 "support NULL handles\n", vha->vp_idx);
2971 return NULL;
2972 }
2973
2974 return cmd;
2975 }
2976
2977 /* hardware_lock should be held by caller. */
2978 static void
2979 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2980 {
2981 struct qla_hw_data *ha = vha->hw;
2982 uint32_t handle;
2983
2984 if (cmd->sg_mapped)
2985 qlt_unmap_sg(vha, cmd);
2986
2987 handle = qlt_make_handle(vha);
2988
2989 /* TODO: fix debug message type and ids. */
2990 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2991 ql_dbg(ql_dbg_io, vha, 0xff00,
2992 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
2993 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2994 cmd->write_data_transferred = 0;
2995 cmd->state = QLA_TGT_STATE_DATA_IN;
2996
2997 ql_dbg(ql_dbg_io, vha, 0xff01,
2998 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
2999
3000 ha->tgt.tgt_ops->handle_data(cmd);
3001 return;
3002 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3003 ql_dbg(ql_dbg_io, vha, 0xff02,
3004 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3005 } else {
3006 ql_dbg(ql_dbg_io, vha, 0xff03,
3007 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3008 cmd->state);
3009 dump_stack();
3010 }
3011
3012 cmd->cmd_flags |= BIT_12;
3013 ha->tgt.tgt_ops->free_cmd(cmd);
3014 }
3015
3016 void
3017 qlt_host_reset_handler(struct qla_hw_data *ha)
3018 {
3019 struct qla_tgt_cmd *cmd;
3020 unsigned long flags;
3021 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3022 scsi_qla_host_t *vha = NULL;
3023 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3024 uint32_t i;
3025
3026 if (!base_vha->hw->tgt.tgt_ops)
3027 return;
3028
3029 if (!tgt || qla_ini_mode_enabled(base_vha)) {
3030 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3031 "Target mode disabled\n");
3032 return;
3033 }
3034
3035 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3036 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3037 base_vha->dpc_flags);
3038
3039 spin_lock_irqsave(&ha->hardware_lock, flags);
3040 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3041 cmd = qlt_get_cmd(base_vha, i);
3042 if (!cmd)
3043 continue;
3044 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3045 vha = cmd->vha;
3046 qlt_abort_cmd_on_host_reset(vha, cmd);
3047 }
3048 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3049 }
3050
3051
3052 /*
3053 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3054 */
3055 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3056 uint32_t status, void *ctio)
3057 {
3058 struct qla_hw_data *ha = vha->hw;
3059 struct se_cmd *se_cmd;
3060 struct qla_tgt_cmd *cmd;
3061
3062 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3063 /* That could happen only in case of an error/reset/abort */
3064 if (status != CTIO_SUCCESS) {
3065 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3066 "Intermediate CTIO received"
3067 " (status %x)\n", status);
3068 }
3069 return;
3070 }
3071
3072 cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3073 if (cmd == NULL)
3074 return;
3075
3076 se_cmd = &cmd->se_cmd;
3077 cmd->cmd_sent_to_fw = 0;
3078
3079 qlt_unmap_sg(vha, cmd);
3080
3081 if (unlikely(status != CTIO_SUCCESS)) {
3082 switch (status & 0xFFFF) {
3083 case CTIO_LIP_RESET:
3084 case CTIO_TARGET_RESET:
3085 case CTIO_ABORTED:
3086 /* driver request abort via Terminate exchange */
3087 case CTIO_TIMEOUT:
3088 case CTIO_INVALID_RX_ID:
3089 /* They are OK */
3090 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3091 "qla_target(%d): CTIO with "
3092 "status %#x received, state %x, se_cmd %p, "
3093 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3094 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3095 status, cmd->state, se_cmd);
3096 break;
3097
3098 case CTIO_PORT_LOGGED_OUT:
3099 case CTIO_PORT_UNAVAILABLE:
3100 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3101 "qla_target(%d): CTIO with PORT LOGGED "
3102 "OUT (29) or PORT UNAVAILABLE (28) status %x "
3103 "received (state %x, se_cmd %p)\n", vha->vp_idx,
3104 status, cmd->state, se_cmd);
3105 break;
3106
3107 case CTIO_SRR_RECEIVED:
3108 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3109 "qla_target(%d): CTIO with SRR_RECEIVED"
3110 " status %x received (state %x, se_cmd %p)\n",
3111 vha->vp_idx, status, cmd->state, se_cmd);
3112 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3113 break;
3114 else
3115 return;
3116
3117 case CTIO_DIF_ERROR: {
3118 struct ctio_crc_from_fw *crc =
3119 (struct ctio_crc_from_fw *)ctio;
3120 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3121 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3122 vha->vp_idx, status, cmd->state, se_cmd,
3123 *((u64 *)&crc->actual_dif[0]),
3124 *((u64 *)&crc->expected_dif[0]));
3125
3126 if (qlt_handle_dif_error(vha, cmd, ctio)) {
3127 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3128 /* scsi Write/xfer rdy complete */
3129 goto skip_term;
3130 } else {
3131 /* scsi read/xmit respond complete
3132 * call handle dif to send scsi status
3133 * rather than terminate exchange.
3134 */
3135 cmd->state = QLA_TGT_STATE_PROCESSED;
3136 ha->tgt.tgt_ops->handle_dif_err(cmd);
3137 return;
3138 }
3139 } else {
3140 /* Need to generate a SCSI good completion.
3141 * because FW did not send scsi status.
3142 */
3143 status = 0;
3144 goto skip_term;
3145 }
3146 break;
3147 }
3148 default:
3149 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3150 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3151 vha->vp_idx, status, cmd->state, se_cmd);
3152 break;
3153 }
3154
3155
3156 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3157 * cmd is already aborted/terminated, we don't
3158 * need to terminate again. The exchange is already
3159 * cleaned up/freed at FW level. Just cleanup at driver
3160 * level.
3161 */
3162 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3163 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3164 cmd->cmd_flags |= BIT_13;
3165 if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3166 return;
3167 }
3168 }
3169 skip_term:
3170
3171 if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3172 ;
3173 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3174 cmd->state = QLA_TGT_STATE_DATA_IN;
3175
3176 if (status == CTIO_SUCCESS)
3177 cmd->write_data_transferred = 1;
3178
3179 ha->tgt.tgt_ops->handle_data(cmd);
3180 return;
3181 } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3182 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3183 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3184 } else {
3185 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3186 "qla_target(%d): A command in state (%d) should "
3187 "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3188 }
3189
3190 if (unlikely(status != CTIO_SUCCESS) &&
3191 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3192 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3193 dump_stack();
3194 }
3195
3196
3197 ha->tgt.tgt_ops->free_cmd(cmd);
3198 }
3199
3200 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3201 uint8_t task_codes)
3202 {
3203 int fcp_task_attr;
3204
3205 switch (task_codes) {
3206 case ATIO_SIMPLE_QUEUE:
3207 fcp_task_attr = TCM_SIMPLE_TAG;
3208 break;
3209 case ATIO_HEAD_OF_QUEUE:
3210 fcp_task_attr = TCM_HEAD_TAG;
3211 break;
3212 case ATIO_ORDERED_QUEUE:
3213 fcp_task_attr = TCM_ORDERED_TAG;
3214 break;
3215 case ATIO_ACA_QUEUE:
3216 fcp_task_attr = TCM_ACA_TAG;
3217 break;
3218 case ATIO_UNTAGGED:
3219 fcp_task_attr = TCM_SIMPLE_TAG;
3220 break;
3221 default:
3222 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3223 "qla_target: unknown task code %x, use ORDERED instead\n",
3224 task_codes);
3225 fcp_task_attr = TCM_ORDERED_TAG;
3226 break;
3227 }
3228
3229 return fcp_task_attr;
3230 }
3231
3232 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3233 uint8_t *);
3234 /*
3235 * Process context for I/O path into tcm_qla2xxx code
3236 */
3237 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3238 {
3239 scsi_qla_host_t *vha = cmd->vha;
3240 struct qla_hw_data *ha = vha->hw;
3241 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3242 struct qla_tgt_sess *sess = cmd->sess;
3243 struct atio_from_isp *atio = &cmd->atio;
3244 unsigned char *cdb;
3245 unsigned long flags;
3246 uint32_t data_length;
3247 int ret, fcp_task_attr, data_dir, bidi = 0;
3248
3249 cmd->cmd_in_wq = 0;
3250 cmd->cmd_flags |= BIT_1;
3251 if (tgt->tgt_stop)
3252 goto out_term;
3253
3254 cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3255 cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3256 cmd->unpacked_lun = scsilun_to_int(
3257 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3258
3259 if (atio->u.isp24.fcp_cmnd.rddata &&
3260 atio->u.isp24.fcp_cmnd.wrdata) {
3261 bidi = 1;
3262 data_dir = DMA_TO_DEVICE;
3263 } else if (atio->u.isp24.fcp_cmnd.rddata)
3264 data_dir = DMA_FROM_DEVICE;
3265 else if (atio->u.isp24.fcp_cmnd.wrdata)
3266 data_dir = DMA_TO_DEVICE;
3267 else
3268 data_dir = DMA_NONE;
3269
3270 fcp_task_attr = qlt_get_fcp_task_attr(vha,
3271 atio->u.isp24.fcp_cmnd.task_attr);
3272 data_length = be32_to_cpu(get_unaligned((uint32_t *)
3273 &atio->u.isp24.fcp_cmnd.add_cdb[
3274 atio->u.isp24.fcp_cmnd.add_cdb_len]));
3275
3276 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3277 fcp_task_attr, data_dir, bidi);
3278 if (ret != 0)
3279 goto out_term;
3280 /*
3281 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3282 */
3283 spin_lock_irqsave(&ha->hardware_lock, flags);
3284 ha->tgt.tgt_ops->put_sess(sess);
3285 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3286 return;
3287
3288 out_term:
3289 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3290 /*
3291 * cmd has not sent to target yet, so pass NULL as the second
3292 * argument to qlt_send_term_exchange() and free the memory here.
3293 */
3294 cmd->cmd_flags |= BIT_2;
3295 spin_lock_irqsave(&ha->hardware_lock, flags);
3296 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3297
3298 qlt_decr_num_pend_cmds(vha);
3299 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3300 ha->tgt.tgt_ops->put_sess(sess);
3301 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3302 }
3303
3304 static void qlt_do_work(struct work_struct *work)
3305 {
3306 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3307
3308 __qlt_do_work(cmd);
3309 }
3310
3311 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3312 struct qla_tgt_sess *sess,
3313 struct atio_from_isp *atio)
3314 {
3315 struct se_session *se_sess = sess->se_sess;
3316 struct qla_tgt_cmd *cmd;
3317 int tag;
3318
3319 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3320 if (tag < 0)
3321 return NULL;
3322
3323 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3324 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3325
3326 memcpy(&cmd->atio, atio, sizeof(*atio));
3327 cmd->state = QLA_TGT_STATE_NEW;
3328 cmd->tgt = vha->vha_tgt.qla_tgt;
3329 qlt_incr_num_pend_cmds(vha);
3330 cmd->vha = vha;
3331 cmd->se_cmd.map_tag = tag;
3332 cmd->sess = sess;
3333 cmd->loop_id = sess->loop_id;
3334 cmd->conf_compl_supported = sess->conf_compl_supported;
3335
3336 return cmd;
3337 }
3338
3339 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3340 uint16_t);
3341
3342 static void qlt_create_sess_from_atio(struct work_struct *work)
3343 {
3344 struct qla_tgt_sess_op *op = container_of(work,
3345 struct qla_tgt_sess_op, work);
3346 scsi_qla_host_t *vha = op->vha;
3347 struct qla_hw_data *ha = vha->hw;
3348 struct qla_tgt_sess *sess;
3349 struct qla_tgt_cmd *cmd;
3350 unsigned long flags;
3351 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3352
3353 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3354 "qla_target(%d): Unable to find wwn login"
3355 " (s_id %x:%x:%x), trying to create it manually\n",
3356 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3357
3358 if (op->atio.u.raw.entry_count > 1) {
3359 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3360 "Dropping multy entry atio %p\n", &op->atio);
3361 goto out_term;
3362 }
3363
3364 mutex_lock(&vha->vha_tgt.tgt_mutex);
3365 sess = qlt_make_local_sess(vha, s_id);
3366 /* sess has an extra creation ref. */
3367 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3368
3369 if (!sess)
3370 goto out_term;
3371 /*
3372 * Now obtain a pre-allocated session tag using the original op->atio
3373 * packet header, and dispatch into __qlt_do_work() using the existing
3374 * process context.
3375 */
3376 cmd = qlt_get_tag(vha, sess, &op->atio);
3377 if (!cmd) {
3378 spin_lock_irqsave(&ha->hardware_lock, flags);
3379 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3380 ha->tgt.tgt_ops->put_sess(sess);
3381 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3382 kfree(op);
3383 return;
3384 }
3385 /*
3386 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3387 * the extra reference taken above by qlt_make_local_sess()
3388 */
3389 __qlt_do_work(cmd);
3390 kfree(op);
3391 return;
3392
3393 out_term:
3394 spin_lock_irqsave(&ha->hardware_lock, flags);
3395 qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3396 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3397 kfree(op);
3398
3399 }
3400
3401 /* ha->hardware_lock supposed to be held on entry */
3402 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3403 struct atio_from_isp *atio)
3404 {
3405 struct qla_hw_data *ha = vha->hw;
3406 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3407 struct qla_tgt_sess *sess;
3408 struct qla_tgt_cmd *cmd;
3409
3410 if (unlikely(tgt->tgt_stop)) {
3411 ql_dbg(ql_dbg_io, vha, 0x3061,
3412 "New command while device %p is shutting down\n", tgt);
3413 return -EFAULT;
3414 }
3415
3416 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3417 if (unlikely(!sess)) {
3418 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3419 GFP_ATOMIC);
3420 if (!op)
3421 return -ENOMEM;
3422
3423 memcpy(&op->atio, atio, sizeof(*atio));
3424 op->vha = vha;
3425 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3426 queue_work(qla_tgt_wq, &op->work);
3427 return 0;
3428 }
3429 /*
3430 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3431 */
3432 kref_get(&sess->se_sess->sess_kref);
3433
3434 cmd = qlt_get_tag(vha, sess, atio);
3435 if (!cmd) {
3436 ql_dbg(ql_dbg_io, vha, 0x3062,
3437 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3438 ha->tgt.tgt_ops->put_sess(sess);
3439 return -ENOMEM;
3440 }
3441
3442 cmd->cmd_flags = 0;
3443 cmd->jiffies_at_alloc = get_jiffies_64();
3444
3445 cmd->reset_count = vha->hw->chip_reset;
3446
3447 cmd->cmd_in_wq = 1;
3448 cmd->cmd_flags |= BIT_0;
3449 INIT_WORK(&cmd->work, qlt_do_work);
3450 queue_work(qla_tgt_wq, &cmd->work);
3451 return 0;
3452
3453 }
3454
3455 /* ha->hardware_lock supposed to be held on entry */
3456 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3457 int fn, void *iocb, int flags)
3458 {
3459 struct scsi_qla_host *vha = sess->vha;
3460 struct qla_hw_data *ha = vha->hw;
3461 struct qla_tgt_mgmt_cmd *mcmd;
3462 int res;
3463 uint8_t tmr_func;
3464
3465 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3466 if (!mcmd) {
3467 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3468 "qla_target(%d): Allocation of management "
3469 "command failed, some commands and their data could "
3470 "leak\n", vha->vp_idx);
3471 return -ENOMEM;
3472 }
3473 memset(mcmd, 0, sizeof(*mcmd));
3474 mcmd->sess = sess;
3475
3476 if (iocb) {
3477 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3478 sizeof(mcmd->orig_iocb.imm_ntfy));
3479 }
3480 mcmd->tmr_func = fn;
3481 mcmd->flags = flags;
3482 mcmd->reset_count = vha->hw->chip_reset;
3483
3484 switch (fn) {
3485 case QLA_TGT_CLEAR_ACA:
3486 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3487 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3488 tmr_func = TMR_CLEAR_ACA;
3489 break;
3490
3491 case QLA_TGT_TARGET_RESET:
3492 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3493 "qla_target(%d): TARGET_RESET received\n",
3494 sess->vha->vp_idx);
3495 tmr_func = TMR_TARGET_WARM_RESET;
3496 break;
3497
3498 case QLA_TGT_LUN_RESET:
3499 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3500 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3501 tmr_func = TMR_LUN_RESET;
3502 break;
3503
3504 case QLA_TGT_CLEAR_TS:
3505 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3506 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3507 tmr_func = TMR_CLEAR_TASK_SET;
3508 break;
3509
3510 case QLA_TGT_ABORT_TS:
3511 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3512 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3513 tmr_func = TMR_ABORT_TASK_SET;
3514 break;
3515 #if 0
3516 case QLA_TGT_ABORT_ALL:
3517 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3518 "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3519 sess->vha->vp_idx);
3520 tmr_func = 0;
3521 break;
3522
3523 case QLA_TGT_ABORT_ALL_SESS:
3524 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3525 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3526 sess->vha->vp_idx);
3527 tmr_func = 0;
3528 break;
3529
3530 case QLA_TGT_NEXUS_LOSS_SESS:
3531 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3532 "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3533 sess->vha->vp_idx);
3534 tmr_func = 0;
3535 break;
3536
3537 case QLA_TGT_NEXUS_LOSS:
3538 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3539 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3540 tmr_func = 0;
3541 break;
3542 #endif
3543 default:
3544 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3545 "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3546 sess->vha->vp_idx, fn);
3547 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3548 return -ENOSYS;
3549 }
3550
3551 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3552 if (res != 0) {
3553 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3554 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3555 sess->vha->vp_idx, res);
3556 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3557 return -EFAULT;
3558 }
3559
3560 return 0;
3561 }
3562
3563 /* ha->hardware_lock supposed to be held on entry */
3564 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3565 {
3566 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3567 struct qla_hw_data *ha = vha->hw;
3568 struct qla_tgt *tgt;
3569 struct qla_tgt_sess *sess;
3570 uint32_t lun, unpacked_lun;
3571 int fn;
3572
3573 tgt = vha->vha_tgt.qla_tgt;
3574
3575 lun = a->u.isp24.fcp_cmnd.lun;
3576 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3577 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3578 a->u.isp24.fcp_hdr.s_id);
3579 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3580
3581 if (!sess) {
3582 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3583 "qla_target(%d): task mgmt fn 0x%x for "
3584 "non-existant session\n", vha->vp_idx, fn);
3585 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3586 sizeof(struct atio_from_isp));
3587 }
3588
3589 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3590 }
3591
3592 /* ha->hardware_lock supposed to be held on entry */
3593 static int __qlt_abort_task(struct scsi_qla_host *vha,
3594 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3595 {
3596 struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3597 struct qla_hw_data *ha = vha->hw;
3598 struct qla_tgt_mgmt_cmd *mcmd;
3599 uint32_t lun, unpacked_lun;
3600 int rc;
3601
3602 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3603 if (mcmd == NULL) {
3604 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3605 "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3606 vha->vp_idx, __func__);
3607 return -ENOMEM;
3608 }
3609 memset(mcmd, 0, sizeof(*mcmd));
3610
3611 mcmd->sess = sess;
3612 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3613 sizeof(mcmd->orig_iocb.imm_ntfy));
3614
3615 lun = a->u.isp24.fcp_cmnd.lun;
3616 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3617 mcmd->reset_count = vha->hw->chip_reset;
3618
3619 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3620 le16_to_cpu(iocb->u.isp2x.seq_id));
3621 if (rc != 0) {
3622 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3623 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3624 vha->vp_idx, rc);
3625 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3626 return -EFAULT;
3627 }
3628
3629 return 0;
3630 }
3631
3632 /* ha->hardware_lock supposed to be held on entry */
3633 static int qlt_abort_task(struct scsi_qla_host *vha,
3634 struct imm_ntfy_from_isp *iocb)
3635 {
3636 struct qla_hw_data *ha = vha->hw;
3637 struct qla_tgt_sess *sess;
3638 int loop_id;
3639
3640 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3641
3642 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3643 if (sess == NULL) {
3644 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3645 "qla_target(%d): task abort for unexisting "
3646 "session\n", vha->vp_idx);
3647 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3648 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3649 }
3650
3651 return __qlt_abort_task(vha, iocb, sess);
3652 }
3653
3654 /*
3655 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3656 */
3657 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3658 struct imm_ntfy_from_isp *iocb)
3659 {
3660 int res = 0;
3661
3662 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3663 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3664 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3665
3666 switch (iocb->u.isp24.status_subcode) {
3667 case ELS_PLOGI:
3668 case ELS_FLOGI:
3669 case ELS_PRLI:
3670 case ELS_LOGO:
3671 case ELS_PRLO:
3672 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3673 break;
3674 case ELS_PDISC:
3675 case ELS_ADISC:
3676 {
3677 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3678 if (tgt->link_reinit_iocb_pending) {
3679 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3680 0, 0, 0, 0, 0, 0);
3681 tgt->link_reinit_iocb_pending = 0;
3682 }
3683 res = 1; /* send notify ack */
3684 break;
3685 }
3686
3687 default:
3688 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3689 "qla_target(%d): Unsupported ELS command %x "
3690 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3691 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3692 break;
3693 }
3694
3695 return res;
3696 }
3697
3698 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3699 {
3700 #if 1
3701 /*
3702 * FIXME: Reject non zero SRR relative offset until we can test
3703 * this code properly.
3704 */
3705 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3706 return -1;
3707 #else
3708 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3709 size_t first_offset = 0, rem_offset = offset, tmp = 0;
3710 int i, sg_srr_cnt, bufflen = 0;
3711
3712 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3713 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3714 "cmd->sg_cnt: %u, direction: %d\n",
3715 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3716
3717 if (!cmd->sg || !cmd->sg_cnt) {
3718 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3719 "Missing cmd->sg or zero cmd->sg_cnt in"
3720 " qla_tgt_set_data_offset\n");
3721 return -EINVAL;
3722 }
3723 /*
3724 * Walk the current cmd->sg list until we locate the new sg_srr_start
3725 */
3726 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3727 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3728 "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3729 i, sg, sg_page(sg), sg->length, sg->offset);
3730
3731 if ((sg->length + tmp) > offset) {
3732 first_offset = rem_offset;
3733 sg_srr_start = sg;
3734 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3735 "Found matching sg[%d], using %p as sg_srr_start, "
3736 "and using first_offset: %zu\n", i, sg,
3737 first_offset);
3738 break;
3739 }
3740 tmp += sg->length;
3741 rem_offset -= sg->length;
3742 }
3743
3744 if (!sg_srr_start) {
3745 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3746 "Unable to locate sg_srr_start for offset: %u\n", offset);
3747 return -EINVAL;
3748 }
3749 sg_srr_cnt = (cmd->sg_cnt - i);
3750
3751 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3752 if (!sg_srr) {
3753 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3754 "Unable to allocate sgp\n");
3755 return -ENOMEM;
3756 }
3757 sg_init_table(sg_srr, sg_srr_cnt);
3758 sgp = &sg_srr[0];
3759 /*
3760 * Walk the remaining list for sg_srr_start, mapping to the newly
3761 * allocated sg_srr taking first_offset into account.
3762 */
3763 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3764 if (first_offset) {
3765 sg_set_page(sgp, sg_page(sg),
3766 (sg->length - first_offset), first_offset);
3767 first_offset = 0;
3768 } else {
3769 sg_set_page(sgp, sg_page(sg), sg->length, 0);
3770 }
3771 bufflen += sgp->length;
3772
3773 sgp = sg_next(sgp);
3774 if (!sgp)
3775 break;
3776 }
3777
3778 cmd->sg = sg_srr;
3779 cmd->sg_cnt = sg_srr_cnt;
3780 cmd->bufflen = bufflen;
3781 cmd->offset += offset;
3782 cmd->free_sg = 1;
3783
3784 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3785 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3786 cmd->sg_cnt);
3787 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3788 cmd->bufflen);
3789 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3790 cmd->offset);
3791
3792 if (cmd->sg_cnt < 0)
3793 BUG();
3794
3795 if (cmd->bufflen < 0)
3796 BUG();
3797
3798 return 0;
3799 #endif
3800 }
3801
3802 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3803 uint32_t srr_rel_offs, int *xmit_type)
3804 {
3805 int res = 0, rel_offs;
3806
3807 rel_offs = srr_rel_offs - cmd->offset;
3808 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3809 srr_rel_offs, rel_offs);
3810
3811 *xmit_type = QLA_TGT_XMIT_ALL;
3812
3813 if (rel_offs < 0) {
3814 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3815 "qla_target(%d): SRR rel_offs (%d) < 0",
3816 cmd->vha->vp_idx, rel_offs);
3817 res = -1;
3818 } else if (rel_offs == cmd->bufflen)
3819 *xmit_type = QLA_TGT_XMIT_STATUS;
3820 else if (rel_offs > 0)
3821 res = qlt_set_data_offset(cmd, rel_offs);
3822
3823 return res;
3824 }
3825
3826 /* No locks, thread context */
3827 static void qlt_handle_srr(struct scsi_qla_host *vha,
3828 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3829 {
3830 struct imm_ntfy_from_isp *ntfy =
3831 (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3832 struct qla_hw_data *ha = vha->hw;
3833 struct qla_tgt_cmd *cmd = sctio->cmd;
3834 struct se_cmd *se_cmd = &cmd->se_cmd;
3835 unsigned long flags;
3836 int xmit_type = 0, resp = 0;
3837 uint32_t offset;
3838 uint16_t srr_ui;
3839
3840 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3841 srr_ui = ntfy->u.isp24.srr_ui;
3842
3843 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3844 cmd, srr_ui);
3845
3846 switch (srr_ui) {
3847 case SRR_IU_STATUS:
3848 spin_lock_irqsave(&ha->hardware_lock, flags);
3849 qlt_send_notify_ack(vha, ntfy,
3850 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3851 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3852 xmit_type = QLA_TGT_XMIT_STATUS;
3853 resp = 1;
3854 break;
3855 case SRR_IU_DATA_IN:
3856 if (!cmd->sg || !cmd->sg_cnt) {
3857 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3858 "Unable to process SRR_IU_DATA_IN due to"
3859 " missing cmd->sg, state: %d\n", cmd->state);
3860 dump_stack();
3861 goto out_reject;
3862 }
3863 if (se_cmd->scsi_status != 0) {
3864 ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3865 "Rejecting SRR_IU_DATA_IN with non GOOD "
3866 "scsi_status\n");
3867 goto out_reject;
3868 }
3869 cmd->bufflen = se_cmd->data_length;
3870
3871 if (qlt_has_data(cmd)) {
3872 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3873 goto out_reject;
3874 spin_lock_irqsave(&ha->hardware_lock, flags);
3875 qlt_send_notify_ack(vha, ntfy,
3876 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3877 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3878 resp = 1;
3879 } else {
3880 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3881 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
3882 vha->vp_idx, se_cmd->tag,
3883 cmd->se_cmd.scsi_status);
3884 goto out_reject;
3885 }
3886 break;
3887 case SRR_IU_DATA_OUT:
3888 if (!cmd->sg || !cmd->sg_cnt) {
3889 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3890 "Unable to process SRR_IU_DATA_OUT due to"
3891 " missing cmd->sg\n");
3892 dump_stack();
3893 goto out_reject;
3894 }
3895 if (se_cmd->scsi_status != 0) {
3896 ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3897 "Rejecting SRR_IU_DATA_OUT"
3898 " with non GOOD scsi_status\n");
3899 goto out_reject;
3900 }
3901 cmd->bufflen = se_cmd->data_length;
3902
3903 if (qlt_has_data(cmd)) {
3904 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3905 goto out_reject;
3906 spin_lock_irqsave(&ha->hardware_lock, flags);
3907 qlt_send_notify_ack(vha, ntfy,
3908 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3909 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3910 if (xmit_type & QLA_TGT_XMIT_DATA) {
3911 cmd->cmd_flags |= BIT_8;
3912 qlt_rdy_to_xfer(cmd);
3913 }
3914 } else {
3915 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3916 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
3917 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
3918 goto out_reject;
3919 }
3920 break;
3921 default:
3922 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3923 "qla_target(%d): Unknown srr_ui value %x",
3924 vha->vp_idx, srr_ui);
3925 goto out_reject;
3926 }
3927
3928 /* Transmit response in case of status and data-in cases */
3929 if (resp) {
3930 cmd->cmd_flags |= BIT_7;
3931 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3932 }
3933
3934 return;
3935
3936 out_reject:
3937 spin_lock_irqsave(&ha->hardware_lock, flags);
3938 qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3939 NOTIFY_ACK_SRR_FLAGS_REJECT,
3940 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3941 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3942 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3943 cmd->state = QLA_TGT_STATE_DATA_IN;
3944 dump_stack();
3945 } else {
3946 cmd->cmd_flags |= BIT_9;
3947 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3948 }
3949 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3950 }
3951
3952 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3953 struct qla_tgt_srr_imm *imm, int ha_locked)
3954 {
3955 struct qla_hw_data *ha = vha->hw;
3956 unsigned long flags = 0;
3957
3958 if (!ha_locked)
3959 spin_lock_irqsave(&ha->hardware_lock, flags);
3960
3961 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3962 NOTIFY_ACK_SRR_FLAGS_REJECT,
3963 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3964 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3965
3966 if (!ha_locked)
3967 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3968
3969 kfree(imm);
3970 }
3971
3972 static void qlt_handle_srr_work(struct work_struct *work)
3973 {
3974 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3975 struct scsi_qla_host *vha = tgt->vha;
3976 struct qla_tgt_srr_ctio *sctio;
3977 unsigned long flags;
3978
3979 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3980 tgt);
3981
3982 restart:
3983 spin_lock_irqsave(&tgt->srr_lock, flags);
3984 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3985 struct qla_tgt_srr_imm *imm, *i, *ti;
3986 struct qla_tgt_cmd *cmd;
3987 struct se_cmd *se_cmd;
3988
3989 imm = NULL;
3990 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3991 srr_list_entry) {
3992 if (i->srr_id == sctio->srr_id) {
3993 list_del(&i->srr_list_entry);
3994 if (imm) {
3995 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3996 "qla_target(%d): There must be "
3997 "only one IMM SRR per CTIO SRR "
3998 "(IMM SRR %p, id %d, CTIO %p\n",
3999 vha->vp_idx, i, i->srr_id, sctio);
4000 qlt_reject_free_srr_imm(tgt->vha, i, 0);
4001 } else
4002 imm = i;
4003 }
4004 }
4005
4006 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4007 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4008 sctio->srr_id);
4009
4010 if (imm == NULL) {
4011 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4012 "Not found matching IMM for SRR CTIO (id %d)\n",
4013 sctio->srr_id);
4014 continue;
4015 } else
4016 list_del(&sctio->srr_list_entry);
4017
4018 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4019
4020 cmd = sctio->cmd;
4021 /*
4022 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4023 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4024 * logic..
4025 */
4026 cmd->offset = 0;
4027 if (cmd->free_sg) {
4028 kfree(cmd->sg);
4029 cmd->sg = NULL;
4030 cmd->free_sg = 0;
4031 }
4032 se_cmd = &cmd->se_cmd;
4033
4034 cmd->sg_cnt = se_cmd->t_data_nents;
4035 cmd->sg = se_cmd->t_data_sg;
4036
4037 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4038 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4039 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4040 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4041
4042 qlt_handle_srr(vha, sctio, imm);
4043
4044 kfree(imm);
4045 kfree(sctio);
4046 goto restart;
4047 }
4048 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4049 }
4050
4051 /* ha->hardware_lock supposed to be held on entry */
4052 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4053 struct imm_ntfy_from_isp *iocb)
4054 {
4055 struct qla_tgt_srr_imm *imm;
4056 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4057 struct qla_tgt_srr_ctio *sctio;
4058
4059 tgt->imm_srr_id++;
4060
4061 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4062 vha->vp_idx);
4063
4064 imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4065 if (imm != NULL) {
4066 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4067
4068 /* IRQ is already OFF */
4069 spin_lock(&tgt->srr_lock);
4070 imm->srr_id = tgt->imm_srr_id;
4071 list_add_tail(&imm->srr_list_entry,
4072 &tgt->srr_imm_list);
4073 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4074 "IMM NTFY SRR %p added (id %d, ui %x)\n",
4075 imm, imm->srr_id, iocb->u.isp24.srr_ui);
4076 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4077 int found = 0;
4078 list_for_each_entry(sctio, &tgt->srr_ctio_list,
4079 srr_list_entry) {
4080 if (sctio->srr_id == imm->srr_id) {
4081 found = 1;
4082 break;
4083 }
4084 }
4085 if (found) {
4086 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4087 "Scheduling srr work\n");
4088 schedule_work(&tgt->srr_work);
4089 } else {
4090 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4091 "qla_target(%d): imm_srr_id "
4092 "== ctio_srr_id (%d), but there is no "
4093 "corresponding SRR CTIO, deleting IMM "
4094 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4095 imm);
4096 list_del(&imm->srr_list_entry);
4097
4098 kfree(imm);
4099
4100 spin_unlock(&tgt->srr_lock);
4101 goto out_reject;
4102 }
4103 }
4104 spin_unlock(&tgt->srr_lock);
4105 } else {
4106 struct qla_tgt_srr_ctio *ts;
4107
4108 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4109 "qla_target(%d): Unable to allocate SRR IMM "
4110 "entry, SRR request will be rejected\n", vha->vp_idx);
4111
4112 /* IRQ is already OFF */
4113 spin_lock(&tgt->srr_lock);
4114 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4115 srr_list_entry) {
4116 if (sctio->srr_id == tgt->imm_srr_id) {
4117 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4118 "CTIO SRR %p deleted (id %d)\n",
4119 sctio, sctio->srr_id);
4120 list_del(&sctio->srr_list_entry);
4121 qlt_send_term_exchange(vha, sctio->cmd,
4122 &sctio->cmd->atio, 1);
4123 kfree(sctio);
4124 }
4125 }
4126 spin_unlock(&tgt->srr_lock);
4127 goto out_reject;
4128 }
4129
4130 return;
4131
4132 out_reject:
4133 qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4134 NOTIFY_ACK_SRR_FLAGS_REJECT,
4135 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4136 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4137 }
4138
4139 /*
4140 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4141 */
4142 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4143 struct imm_ntfy_from_isp *iocb)
4144 {
4145 struct qla_hw_data *ha = vha->hw;
4146 uint32_t add_flags = 0;
4147 int send_notify_ack = 1;
4148 uint16_t status;
4149
4150 status = le16_to_cpu(iocb->u.isp2x.status);
4151 switch (status) {
4152 case IMM_NTFY_LIP_RESET:
4153 {
4154 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4155 "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4156 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4157 iocb->u.isp24.status_subcode);
4158
4159 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4160 send_notify_ack = 0;
4161 break;
4162 }
4163
4164 case IMM_NTFY_LIP_LINK_REINIT:
4165 {
4166 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4167 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4168 "qla_target(%d): LINK REINIT (loop %#x, "
4169 "subcode %x)\n", vha->vp_idx,
4170 le16_to_cpu(iocb->u.isp24.nport_handle),
4171 iocb->u.isp24.status_subcode);
4172 if (tgt->link_reinit_iocb_pending) {
4173 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4174 0, 0, 0, 0, 0, 0);
4175 }
4176 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4177 tgt->link_reinit_iocb_pending = 1;
4178 /*
4179 * QLogic requires to wait after LINK REINIT for possible
4180 * PDISC or ADISC ELS commands
4181 */
4182 send_notify_ack = 0;
4183 break;
4184 }
4185
4186 case IMM_NTFY_PORT_LOGOUT:
4187 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4188 "qla_target(%d): Port logout (loop "
4189 "%#x, subcode %x)\n", vha->vp_idx,
4190 le16_to_cpu(iocb->u.isp24.nport_handle),
4191 iocb->u.isp24.status_subcode);
4192
4193 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4194 send_notify_ack = 0;
4195 /* The sessions will be cleared in the callback, if needed */
4196 break;
4197
4198 case IMM_NTFY_GLBL_TPRLO:
4199 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4200 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4201 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4202 send_notify_ack = 0;
4203 /* The sessions will be cleared in the callback, if needed */
4204 break;
4205
4206 case IMM_NTFY_PORT_CONFIG:
4207 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4208 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4209 status);
4210 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4211 send_notify_ack = 0;
4212 /* The sessions will be cleared in the callback, if needed */
4213 break;
4214
4215 case IMM_NTFY_GLBL_LOGO:
4216 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4217 "qla_target(%d): Link failure detected\n",
4218 vha->vp_idx);
4219 /* I_T nexus loss */
4220 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4221 send_notify_ack = 0;
4222 break;
4223
4224 case IMM_NTFY_IOCB_OVERFLOW:
4225 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4226 "qla_target(%d): Cannot provide requested "
4227 "capability (IOCB overflowed the immediate notify "
4228 "resource count)\n", vha->vp_idx);
4229 break;
4230
4231 case IMM_NTFY_ABORT_TASK:
4232 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4233 "qla_target(%d): Abort Task (S %08x I %#x -> "
4234 "L %#x)\n", vha->vp_idx,
4235 le16_to_cpu(iocb->u.isp2x.seq_id),
4236 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4237 le16_to_cpu(iocb->u.isp2x.lun));
4238 if (qlt_abort_task(vha, iocb) == 0)
4239 send_notify_ack = 0;
4240 break;
4241
4242 case IMM_NTFY_RESOURCE:
4243 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4244 "qla_target(%d): Out of resources, host %ld\n",
4245 vha->vp_idx, vha->host_no);
4246 break;
4247
4248 case IMM_NTFY_MSG_RX:
4249 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4250 "qla_target(%d): Immediate notify task %x\n",
4251 vha->vp_idx, iocb->u.isp2x.task_flags);
4252 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4253 send_notify_ack = 0;
4254 break;
4255
4256 case IMM_NTFY_ELS:
4257 if (qlt_24xx_handle_els(vha, iocb) == 0)
4258 send_notify_ack = 0;
4259 break;
4260
4261 case IMM_NTFY_SRR:
4262 qlt_prepare_srr_imm(vha, iocb);
4263 send_notify_ack = 0;
4264 break;
4265
4266 default:
4267 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4268 "qla_target(%d): Received unknown immediate "
4269 "notify status %x\n", vha->vp_idx, status);
4270 break;
4271 }
4272
4273 if (send_notify_ack)
4274 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4275 }
4276
4277 /*
4278 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4279 * This function sends busy to ISP 2xxx or 24xx.
4280 */
4281 static int __qlt_send_busy(struct scsi_qla_host *vha,
4282 struct atio_from_isp *atio, uint16_t status)
4283 {
4284 struct ctio7_to_24xx *ctio24;
4285 struct qla_hw_data *ha = vha->hw;
4286 request_t *pkt;
4287 struct qla_tgt_sess *sess = NULL;
4288
4289 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4290 atio->u.isp24.fcp_hdr.s_id);
4291 if (!sess) {
4292 qlt_send_term_exchange(vha, NULL, atio, 1);
4293 return 0;
4294 }
4295 /* Sending marker isn't necessary, since we called from ISR */
4296
4297 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4298 if (!pkt) {
4299 ql_dbg(ql_dbg_io, vha, 0x3063,
4300 "qla_target(%d): %s failed: unable to allocate "
4301 "request packet", vha->vp_idx, __func__);
4302 return -ENOMEM;
4303 }
4304
4305 pkt->entry_count = 1;
4306 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4307
4308 ctio24 = (struct ctio7_to_24xx *)pkt;
4309 ctio24->entry_type = CTIO_TYPE7;
4310 ctio24->nport_handle = sess->loop_id;
4311 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
4312 ctio24->vp_index = vha->vp_idx;
4313 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4314 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4315 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4316 ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4317 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4318 cpu_to_le16(
4319 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4320 CTIO7_FLAGS_DONT_RET_CTIO);
4321 /*
4322 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4323 * if the explicit conformation is used.
4324 */
4325 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4326 ctio24->u.status1.scsi_status = cpu_to_le16(status);
4327 /* Memory Barrier */
4328 wmb();
4329 qla2x00_start_iocbs(vha, vha->req);
4330 return 0;
4331 }
4332
4333 /*
4334 * This routine is used to allocate a command for either a QFull condition
4335 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4336 * out previously.
4337 */
4338 static void
4339 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4340 struct atio_from_isp *atio, uint16_t status, int qfull)
4341 {
4342 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4343 struct qla_hw_data *ha = vha->hw;
4344 struct qla_tgt_sess *sess;
4345 struct se_session *se_sess;
4346 struct qla_tgt_cmd *cmd;
4347 int tag;
4348
4349 if (unlikely(tgt->tgt_stop)) {
4350 ql_dbg(ql_dbg_io, vha, 0x300a,
4351 "New command while device %p is shutting down\n", tgt);
4352 return;
4353 }
4354
4355 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4356 vha->hw->tgt.num_qfull_cmds_dropped++;
4357 if (vha->hw->tgt.num_qfull_cmds_dropped >
4358 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4359 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4360 vha->hw->tgt.num_qfull_cmds_dropped;
4361
4362 ql_dbg(ql_dbg_io, vha, 0x3068,
4363 "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4364 vha->vp_idx, __func__,
4365 vha->hw->tgt.num_qfull_cmds_dropped);
4366
4367 qlt_chk_exch_leak_thresh_hold(vha);
4368 return;
4369 }
4370
4371 sess = ha->tgt.tgt_ops->find_sess_by_s_id
4372 (vha, atio->u.isp24.fcp_hdr.s_id);
4373 if (!sess)
4374 return;
4375
4376 se_sess = sess->se_sess;
4377
4378 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4379 if (tag < 0)
4380 return;
4381
4382 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4383 if (!cmd) {
4384 ql_dbg(ql_dbg_io, vha, 0x3009,
4385 "qla_target(%d): %s: Allocation of cmd failed\n",
4386 vha->vp_idx, __func__);
4387
4388 vha->hw->tgt.num_qfull_cmds_dropped++;
4389 if (vha->hw->tgt.num_qfull_cmds_dropped >
4390 vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4391 vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4392 vha->hw->tgt.num_qfull_cmds_dropped;
4393
4394 qlt_chk_exch_leak_thresh_hold(vha);
4395 return;
4396 }
4397
4398 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4399
4400 qlt_incr_num_pend_cmds(vha);
4401 INIT_LIST_HEAD(&cmd->cmd_list);
4402 memcpy(&cmd->atio, atio, sizeof(*atio));
4403
4404 cmd->tgt = vha->vha_tgt.qla_tgt;
4405 cmd->vha = vha;
4406 cmd->reset_count = vha->hw->chip_reset;
4407 cmd->q_full = 1;
4408
4409 if (qfull) {
4410 cmd->q_full = 1;
4411 /* NOTE: borrowing the state field to carry the status */
4412 cmd->state = status;
4413 } else
4414 cmd->term_exchg = 1;
4415
4416 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4417
4418 vha->hw->tgt.num_qfull_cmds_alloc++;
4419 if (vha->hw->tgt.num_qfull_cmds_alloc >
4420 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4421 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4422 vha->hw->tgt.num_qfull_cmds_alloc;
4423 }
4424
4425 int
4426 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4427 {
4428 struct qla_hw_data *ha = vha->hw;
4429 unsigned long flags;
4430 struct qla_tgt_cmd *cmd, *tcmd;
4431 struct list_head free_list;
4432 int rc = 0;
4433
4434 if (list_empty(&ha->tgt.q_full_list))
4435 return 0;
4436
4437 INIT_LIST_HEAD(&free_list);
4438
4439 spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4440
4441 if (list_empty(&ha->tgt.q_full_list)) {
4442 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4443 return 0;
4444 }
4445
4446 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4447 if (cmd->q_full)
4448 /* cmd->state is a borrowed field to hold status */
4449 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4450 else if (cmd->term_exchg)
4451 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4452
4453 if (rc == -ENOMEM)
4454 break;
4455
4456 if (cmd->q_full)
4457 ql_dbg(ql_dbg_io, vha, 0x3006,
4458 "%s: busy sent for ox_id[%04x]\n", __func__,
4459 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4460 else if (cmd->term_exchg)
4461 ql_dbg(ql_dbg_io, vha, 0x3007,
4462 "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4463 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4464 else
4465 ql_dbg(ql_dbg_io, vha, 0x3008,
4466 "%s: Unexpected cmd in QFull list %p\n", __func__,
4467 cmd);
4468
4469 list_del(&cmd->cmd_list);
4470 list_add_tail(&cmd->cmd_list, &free_list);
4471
4472 /* piggy back on hardware_lock for protection */
4473 vha->hw->tgt.num_qfull_cmds_alloc--;
4474 }
4475 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4476
4477 cmd = NULL;
4478
4479 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4480 list_del(&cmd->cmd_list);
4481 /* This cmd was never sent to TCM. There is no need
4482 * to schedule free or call free_cmd
4483 */
4484 qlt_free_cmd(cmd);
4485 }
4486 return rc;
4487 }
4488
4489 static void
4490 qlt_send_busy(struct scsi_qla_host *vha,
4491 struct atio_from_isp *atio, uint16_t status)
4492 {
4493 int rc = 0;
4494
4495 rc = __qlt_send_busy(vha, atio, status);
4496 if (rc == -ENOMEM)
4497 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4498 }
4499
4500 static int
4501 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4502 struct atio_from_isp *atio)
4503 {
4504 struct qla_hw_data *ha = vha->hw;
4505 uint16_t status;
4506
4507 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4508 return 0;
4509
4510 status = temp_sam_status;
4511 qlt_send_busy(vha, atio, status);
4512 return 1;
4513 }
4514
4515 /* ha->hardware_lock supposed to be held on entry */
4516 /* called via callback from qla2xxx */
4517 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4518 struct atio_from_isp *atio)
4519 {
4520 struct qla_hw_data *ha = vha->hw;
4521 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4522 int rc;
4523
4524 if (unlikely(tgt == NULL)) {
4525 ql_dbg(ql_dbg_io, vha, 0x3064,
4526 "ATIO pkt, but no tgt (ha %p)", ha);
4527 return;
4528 }
4529 /*
4530 * In tgt_stop mode we also should allow all requests to pass.
4531 * Otherwise, some commands can stuck.
4532 */
4533
4534 tgt->irq_cmd_count++;
4535
4536 switch (atio->u.raw.entry_type) {
4537 case ATIO_TYPE7:
4538 if (unlikely(atio->u.isp24.exchange_addr ==
4539 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4540 ql_dbg(ql_dbg_io, vha, 0x3065,
4541 "qla_target(%d): ATIO_TYPE7 "
4542 "received with UNKNOWN exchange address, "
4543 "sending QUEUE_FULL\n", vha->vp_idx);
4544 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4545 break;
4546 }
4547
4548
4549
4550 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4551 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4552 if (rc != 0) {
4553 tgt->irq_cmd_count--;
4554 return;
4555 }
4556 rc = qlt_handle_cmd_for_atio(vha, atio);
4557 } else {
4558 rc = qlt_handle_task_mgmt(vha, atio);
4559 }
4560 if (unlikely(rc != 0)) {
4561 if (rc == -ESRCH) {
4562 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4563 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4564 #else
4565 qlt_send_term_exchange(vha, NULL, atio, 1);
4566 #endif
4567 } else {
4568 if (tgt->tgt_stop) {
4569 ql_dbg(ql_dbg_tgt, vha, 0xe059,
4570 "qla_target: Unable to send "
4571 "command to target for req, "
4572 "ignoring.\n");
4573 } else {
4574 ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4575 "qla_target(%d): Unable to send "
4576 "command to target, sending BUSY "
4577 "status.\n", vha->vp_idx);
4578 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4579 }
4580 }
4581 }
4582 break;
4583
4584 case IMMED_NOTIFY_TYPE:
4585 {
4586 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4587 ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4588 "qla_target(%d): Received ATIO packet %x "
4589 "with error status %x\n", vha->vp_idx,
4590 atio->u.raw.entry_type,
4591 atio->u.isp2x.entry_status);
4592 break;
4593 }
4594 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4595 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4596 break;
4597 }
4598
4599 default:
4600 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4601 "qla_target(%d): Received unknown ATIO atio "
4602 "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4603 break;
4604 }
4605
4606 tgt->irq_cmd_count--;
4607 }
4608
4609 /* ha->hardware_lock supposed to be held on entry */
4610 /* called via callback from qla2xxx */
4611 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4612 {
4613 struct qla_hw_data *ha = vha->hw;
4614 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4615
4616 if (unlikely(tgt == NULL)) {
4617 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4618 "qla_target(%d): Response pkt %x received, but no "
4619 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4620 return;
4621 }
4622
4623 /*
4624 * In tgt_stop mode we also should allow all requests to pass.
4625 * Otherwise, some commands can stuck.
4626 */
4627
4628 tgt->irq_cmd_count++;
4629
4630 switch (pkt->entry_type) {
4631 case CTIO_CRC2:
4632 case CTIO_TYPE7:
4633 {
4634 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4635 qlt_do_ctio_completion(vha, entry->handle,
4636 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4637 entry);
4638 break;
4639 }
4640
4641 case ACCEPT_TGT_IO_TYPE:
4642 {
4643 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4644 int rc;
4645 if (atio->u.isp2x.status !=
4646 cpu_to_le16(ATIO_CDB_VALID)) {
4647 ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4648 "qla_target(%d): ATIO with error "
4649 "status %x received\n", vha->vp_idx,
4650 le16_to_cpu(atio->u.isp2x.status));
4651 break;
4652 }
4653
4654 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4655 if (rc != 0) {
4656 tgt->irq_cmd_count--;
4657 return;
4658 }
4659
4660 rc = qlt_handle_cmd_for_atio(vha, atio);
4661 if (unlikely(rc != 0)) {
4662 if (rc == -ESRCH) {
4663 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4664 qlt_send_busy(vha, atio, 0);
4665 #else
4666 qlt_send_term_exchange(vha, NULL, atio, 1);
4667 #endif
4668 } else {
4669 if (tgt->tgt_stop) {
4670 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4671 "qla_target: Unable to send "
4672 "command to target, sending TERM "
4673 "EXCHANGE for rsp\n");
4674 qlt_send_term_exchange(vha, NULL,
4675 atio, 1);
4676 } else {
4677 ql_dbg(ql_dbg_tgt, vha, 0xe060,
4678 "qla_target(%d): Unable to send "
4679 "command to target, sending BUSY "
4680 "status\n", vha->vp_idx);
4681 qlt_send_busy(vha, atio, 0);
4682 }
4683 }
4684 }
4685 }
4686 break;
4687
4688 case CONTINUE_TGT_IO_TYPE:
4689 {
4690 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4691 qlt_do_ctio_completion(vha, entry->handle,
4692 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4693 entry);
4694 break;
4695 }
4696
4697 case CTIO_A64_TYPE:
4698 {
4699 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4700 qlt_do_ctio_completion(vha, entry->handle,
4701 le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4702 entry);
4703 break;
4704 }
4705
4706 case IMMED_NOTIFY_TYPE:
4707 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4708 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4709 break;
4710
4711 case NOTIFY_ACK_TYPE:
4712 if (tgt->notify_ack_expected > 0) {
4713 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4714 ql_dbg(ql_dbg_tgt, vha, 0xe036,
4715 "NOTIFY_ACK seq %08x status %x\n",
4716 le16_to_cpu(entry->u.isp2x.seq_id),
4717 le16_to_cpu(entry->u.isp2x.status));
4718 tgt->notify_ack_expected--;
4719 if (entry->u.isp2x.status !=
4720 cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4721 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4722 "qla_target(%d): NOTIFY_ACK "
4723 "failed %x\n", vha->vp_idx,
4724 le16_to_cpu(entry->u.isp2x.status));
4725 }
4726 } else {
4727 ql_dbg(ql_dbg_tgt, vha, 0xe062,
4728 "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4729 vha->vp_idx);
4730 }
4731 break;
4732
4733 case ABTS_RECV_24XX:
4734 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4735 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4736 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4737 break;
4738
4739 case ABTS_RESP_24XX:
4740 if (tgt->abts_resp_expected > 0) {
4741 struct abts_resp_from_24xx_fw *entry =
4742 (struct abts_resp_from_24xx_fw *)pkt;
4743 ql_dbg(ql_dbg_tgt, vha, 0xe038,
4744 "ABTS_RESP_24XX: compl_status %x\n",
4745 entry->compl_status);
4746 tgt->abts_resp_expected--;
4747 if (le16_to_cpu(entry->compl_status) !=
4748 ABTS_RESP_COMPL_SUCCESS) {
4749 if ((entry->error_subcode1 == 0x1E) &&
4750 (entry->error_subcode2 == 0)) {
4751 /*
4752 * We've got a race here: aborted
4753 * exchange not terminated, i.e.
4754 * response for the aborted command was
4755 * sent between the abort request was
4756 * received and processed.
4757 * Unfortunately, the firmware has a
4758 * silly requirement that all aborted
4759 * exchanges must be explicitely
4760 * terminated, otherwise it refuses to
4761 * send responses for the abort
4762 * requests. So, we have to
4763 * (re)terminate the exchange and retry
4764 * the abort response.
4765 */
4766 qlt_24xx_retry_term_exchange(vha,
4767 entry);
4768 } else
4769 ql_dbg(ql_dbg_tgt, vha, 0xe063,
4770 "qla_target(%d): ABTS_RESP_24XX "
4771 "failed %x (subcode %x:%x)",
4772 vha->vp_idx, entry->compl_status,
4773 entry->error_subcode1,
4774 entry->error_subcode2);
4775 }
4776 } else {
4777 ql_dbg(ql_dbg_tgt, vha, 0xe064,
4778 "qla_target(%d): Unexpected ABTS_RESP_24XX "
4779 "received\n", vha->vp_idx);
4780 }
4781 break;
4782
4783 default:
4784 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4785 "qla_target(%d): Received unknown response pkt "
4786 "type %x\n", vha->vp_idx, pkt->entry_type);
4787 break;
4788 }
4789
4790 tgt->irq_cmd_count--;
4791 }
4792
4793 /*
4794 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4795 */
4796 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4797 uint16_t *mailbox)
4798 {
4799 struct qla_hw_data *ha = vha->hw;
4800 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4801 int login_code;
4802
4803 if (!ha->tgt.tgt_ops)
4804 return;
4805
4806 if (unlikely(tgt == NULL)) {
4807 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4808 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4809 return;
4810 }
4811
4812 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4813 IS_QLA2100(ha))
4814 return;
4815 /*
4816 * In tgt_stop mode we also should allow all requests to pass.
4817 * Otherwise, some commands can stuck.
4818 */
4819
4820 tgt->irq_cmd_count++;
4821
4822 switch (code) {
4823 case MBA_RESET: /* Reset */
4824 case MBA_SYSTEM_ERR: /* System Error */
4825 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
4826 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
4827 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4828 "qla_target(%d): System error async event %#x "
4829 "occurred", vha->vp_idx, code);
4830 break;
4831 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */
4832 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4833 break;
4834
4835 case MBA_LOOP_UP:
4836 {
4837 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4838 "qla_target(%d): Async LOOP_UP occurred "
4839 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4840 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4841 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4842 if (tgt->link_reinit_iocb_pending) {
4843 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4844 0, 0, 0, 0, 0, 0);
4845 tgt->link_reinit_iocb_pending = 0;
4846 }
4847 break;
4848 }
4849
4850 case MBA_LIP_OCCURRED:
4851 case MBA_LOOP_DOWN:
4852 case MBA_LIP_RESET:
4853 case MBA_RSCN_UPDATE:
4854 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4855 "qla_target(%d): Async event %#x occurred "
4856 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4857 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4858 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4859 break;
4860
4861 case MBA_PORT_UPDATE:
4862 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4863 "qla_target(%d): Port update async event %#x "
4864 "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4865 "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4866 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4867 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4868
4869 login_code = le16_to_cpu(mailbox[2]);
4870 if (login_code == 0x4)
4871 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4872 "Async MB 2: Got PLOGI Complete\n");
4873 else if (login_code == 0x7)
4874 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4875 "Async MB 2: Port Logged Out\n");
4876 break;
4877
4878 default:
4879 break;
4880 }
4881
4882 tgt->irq_cmd_count--;
4883 }
4884
4885 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4886 uint16_t loop_id)
4887 {
4888 fc_port_t *fcport;
4889 int rc;
4890
4891 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4892 if (!fcport) {
4893 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4894 "qla_target(%d): Allocation of tmp FC port failed",
4895 vha->vp_idx);
4896 return NULL;
4897 }
4898
4899 fcport->loop_id = loop_id;
4900
4901 rc = qla2x00_get_port_database(vha, fcport, 0);
4902 if (rc != QLA_SUCCESS) {
4903 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4904 "qla_target(%d): Failed to retrieve fcport "
4905 "information -- get_port_database() returned %x "
4906 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4907 kfree(fcport);
4908 return NULL;
4909 }
4910
4911 return fcport;
4912 }
4913
4914 /* Must be called under tgt_mutex */
4915 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4916 uint8_t *s_id)
4917 {
4918 struct qla_tgt_sess *sess = NULL;
4919 fc_port_t *fcport = NULL;
4920 int rc, global_resets;
4921 uint16_t loop_id = 0;
4922
4923 retry:
4924 global_resets =
4925 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4926
4927 rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4928 if (rc != 0) {
4929 if ((s_id[0] == 0xFF) &&
4930 (s_id[1] == 0xFC)) {
4931 /*
4932 * This is Domain Controller, so it should be
4933 * OK to drop SCSI commands from it.
4934 */
4935 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4936 "Unable to find initiator with S_ID %x:%x:%x",
4937 s_id[0], s_id[1], s_id[2]);
4938 } else
4939 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4940 "qla_target(%d): Unable to find "
4941 "initiator with S_ID %x:%x:%x",
4942 vha->vp_idx, s_id[0], s_id[1],
4943 s_id[2]);
4944 return NULL;
4945 }
4946
4947 fcport = qlt_get_port_database(vha, loop_id);
4948 if (!fcport)
4949 return NULL;
4950
4951 if (global_resets !=
4952 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4953 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4954 "qla_target(%d): global reset during session discovery "
4955 "(counter was %d, new %d), retrying", vha->vp_idx,
4956 global_resets,
4957 atomic_read(&vha->vha_tgt.
4958 qla_tgt->tgt_global_resets_count));
4959 goto retry;
4960 }
4961
4962 sess = qlt_create_sess(vha, fcport, true);
4963
4964 kfree(fcport);
4965 return sess;
4966 }
4967
4968 static void qlt_abort_work(struct qla_tgt *tgt,
4969 struct qla_tgt_sess_work_param *prm)
4970 {
4971 struct scsi_qla_host *vha = tgt->vha;
4972 struct qla_hw_data *ha = vha->hw;
4973 struct qla_tgt_sess *sess = NULL;
4974 unsigned long flags;
4975 uint32_t be_s_id;
4976 uint8_t s_id[3];
4977 int rc;
4978
4979 spin_lock_irqsave(&ha->hardware_lock, flags);
4980
4981 if (tgt->tgt_stop)
4982 goto out_term;
4983
4984 s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4985 s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4986 s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4987
4988 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4989 (unsigned char *)&be_s_id);
4990 if (!sess) {
4991 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4992
4993 mutex_lock(&vha->vha_tgt.tgt_mutex);
4994 sess = qlt_make_local_sess(vha, s_id);
4995 /* sess has got an extra creation ref */
4996 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4997
4998 spin_lock_irqsave(&ha->hardware_lock, flags);
4999 if (!sess)
5000 goto out_term;
5001 } else {
5002 kref_get(&sess->se_sess->sess_kref);
5003 }
5004
5005 if (tgt->tgt_stop)
5006 goto out_term;
5007
5008 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5009 if (rc != 0)
5010 goto out_term;
5011
5012 ha->tgt.tgt_ops->put_sess(sess);
5013 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5014 return;
5015
5016 out_term:
5017 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5018 if (sess)
5019 ha->tgt.tgt_ops->put_sess(sess);
5020 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5021 }
5022
5023 static void qlt_tmr_work(struct qla_tgt *tgt,
5024 struct qla_tgt_sess_work_param *prm)
5025 {
5026 struct atio_from_isp *a = &prm->tm_iocb2;
5027 struct scsi_qla_host *vha = tgt->vha;
5028 struct qla_hw_data *ha = vha->hw;
5029 struct qla_tgt_sess *sess = NULL;
5030 unsigned long flags;
5031 uint8_t *s_id = NULL; /* to hide compiler warnings */
5032 int rc;
5033 uint32_t lun, unpacked_lun;
5034 int fn;
5035 void *iocb;
5036
5037 spin_lock_irqsave(&ha->hardware_lock, flags);
5038
5039 if (tgt->tgt_stop)
5040 goto out_term;
5041
5042 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5043 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5044 if (!sess) {
5045 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5046
5047 mutex_lock(&vha->vha_tgt.tgt_mutex);
5048 sess = qlt_make_local_sess(vha, s_id);
5049 /* sess has got an extra creation ref */
5050 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5051
5052 spin_lock_irqsave(&ha->hardware_lock, flags);
5053 if (!sess)
5054 goto out_term;
5055 } else {
5056 kref_get(&sess->se_sess->sess_kref);
5057 }
5058
5059 iocb = a;
5060 lun = a->u.isp24.fcp_cmnd.lun;
5061 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5062 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5063
5064 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5065 if (rc != 0)
5066 goto out_term;
5067
5068 ha->tgt.tgt_ops->put_sess(sess);
5069 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5070 return;
5071
5072 out_term:
5073 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5074 if (sess)
5075 ha->tgt.tgt_ops->put_sess(sess);
5076 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5077 }
5078
5079 static void qlt_sess_work_fn(struct work_struct *work)
5080 {
5081 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5082 struct scsi_qla_host *vha = tgt->vha;
5083 unsigned long flags;
5084
5085 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5086
5087 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5088 while (!list_empty(&tgt->sess_works_list)) {
5089 struct qla_tgt_sess_work_param *prm = list_entry(
5090 tgt->sess_works_list.next, typeof(*prm),
5091 sess_works_list_entry);
5092
5093 /*
5094 * This work can be scheduled on several CPUs at time, so we
5095 * must delete the entry to eliminate double processing
5096 */
5097 list_del(&prm->sess_works_list_entry);
5098
5099 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5100
5101 switch (prm->type) {
5102 case QLA_TGT_SESS_WORK_ABORT:
5103 qlt_abort_work(tgt, prm);
5104 break;
5105 case QLA_TGT_SESS_WORK_TM:
5106 qlt_tmr_work(tgt, prm);
5107 break;
5108 default:
5109 BUG_ON(1);
5110 break;
5111 }
5112
5113 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5114
5115 kfree(prm);
5116 }
5117 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5118 }
5119
5120 /* Must be called under tgt_host_action_mutex */
5121 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5122 {
5123 struct qla_tgt *tgt;
5124
5125 if (!QLA_TGT_MODE_ENABLED())
5126 return 0;
5127
5128 if (!IS_TGT_MODE_CAPABLE(ha)) {
5129 ql_log(ql_log_warn, base_vha, 0xe070,
5130 "This adapter does not support target mode.\n");
5131 return 0;
5132 }
5133
5134 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5135 "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5136
5137 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5138
5139 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5140 if (!tgt) {
5141 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5142 "Unable to allocate struct qla_tgt\n");
5143 return -ENOMEM;
5144 }
5145
5146 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5147 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5148
5149 tgt->ha = ha;
5150 tgt->vha = base_vha;
5151 init_waitqueue_head(&tgt->waitQ);
5152 INIT_LIST_HEAD(&tgt->sess_list);
5153 INIT_LIST_HEAD(&tgt->del_sess_list);
5154 INIT_DELAYED_WORK(&tgt->sess_del_work,
5155 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5156 spin_lock_init(&tgt->sess_work_lock);
5157 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5158 INIT_LIST_HEAD(&tgt->sess_works_list);
5159 spin_lock_init(&tgt->srr_lock);
5160 INIT_LIST_HEAD(&tgt->srr_ctio_list);
5161 INIT_LIST_HEAD(&tgt->srr_imm_list);
5162 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5163 atomic_set(&tgt->tgt_global_resets_count, 0);
5164
5165 base_vha->vha_tgt.qla_tgt = tgt;
5166
5167 ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5168 "qla_target(%d): using 64 Bit PCI addressing",
5169 base_vha->vp_idx);
5170 tgt->tgt_enable_64bit_addr = 1;
5171 /* 3 is reserved */
5172 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5173 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5174 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5175
5176 if (base_vha->fc_vport)
5177 return 0;
5178
5179 mutex_lock(&qla_tgt_mutex);
5180 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5181 mutex_unlock(&qla_tgt_mutex);
5182
5183 return 0;
5184 }
5185
5186 /* Must be called under tgt_host_action_mutex */
5187 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5188 {
5189 if (!vha->vha_tgt.qla_tgt)
5190 return 0;
5191
5192 if (vha->fc_vport) {
5193 qlt_release(vha->vha_tgt.qla_tgt);
5194 return 0;
5195 }
5196
5197 /* free left over qfull cmds */
5198 qlt_init_term_exchange(vha);
5199
5200 mutex_lock(&qla_tgt_mutex);
5201 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5202 mutex_unlock(&qla_tgt_mutex);
5203
5204 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5205 vha->host_no, ha);
5206 qlt_release(vha->vha_tgt.qla_tgt);
5207
5208 return 0;
5209 }
5210
5211 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5212 unsigned char *b)
5213 {
5214 int i;
5215
5216 pr_debug("qla2xxx HW vha->node_name: ");
5217 for (i = 0; i < WWN_SIZE; i++)
5218 pr_debug("%02x ", vha->node_name[i]);
5219 pr_debug("\n");
5220 pr_debug("qla2xxx HW vha->port_name: ");
5221 for (i = 0; i < WWN_SIZE; i++)
5222 pr_debug("%02x ", vha->port_name[i]);
5223 pr_debug("\n");
5224
5225 pr_debug("qla2xxx passed configfs WWPN: ");
5226 put_unaligned_be64(wwpn, b);
5227 for (i = 0; i < WWN_SIZE; i++)
5228 pr_debug("%02x ", b[i]);
5229 pr_debug("\n");
5230 }
5231
5232 /**
5233 * qla_tgt_lport_register - register lport with external module
5234 *
5235 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5236 * @wwpn: Passwd FC target WWPN
5237 * @callback: lport initialization callback for tcm_qla2xxx code
5238 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5239 */
5240 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5241 u64 npiv_wwpn, u64 npiv_wwnn,
5242 int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5243 {
5244 struct qla_tgt *tgt;
5245 struct scsi_qla_host *vha;
5246 struct qla_hw_data *ha;
5247 struct Scsi_Host *host;
5248 unsigned long flags;
5249 int rc;
5250 u8 b[WWN_SIZE];
5251
5252 mutex_lock(&qla_tgt_mutex);
5253 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5254 vha = tgt->vha;
5255 ha = vha->hw;
5256
5257 host = vha->host;
5258 if (!host)
5259 continue;
5260
5261 if (!(host->hostt->supported_mode & MODE_TARGET))
5262 continue;
5263
5264 spin_lock_irqsave(&ha->hardware_lock, flags);
5265 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5266 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5267 host->host_no);
5268 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5269 continue;
5270 }
5271 if (tgt->tgt_stop) {
5272 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5273 host->host_no);
5274 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5275 continue;
5276 }
5277 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5278
5279 if (!scsi_host_get(host)) {
5280 ql_dbg(ql_dbg_tgt, vha, 0xe068,
5281 "Unable to scsi_host_get() for"
5282 " qla2xxx scsi_host\n");
5283 continue;
5284 }
5285 qlt_lport_dump(vha, phys_wwpn, b);
5286
5287 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5288 scsi_host_put(host);
5289 continue;
5290 }
5291 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5292 if (rc != 0)
5293 scsi_host_put(host);
5294
5295 mutex_unlock(&qla_tgt_mutex);
5296 return rc;
5297 }
5298 mutex_unlock(&qla_tgt_mutex);
5299
5300 return -ENODEV;
5301 }
5302 EXPORT_SYMBOL(qlt_lport_register);
5303
5304 /**
5305 * qla_tgt_lport_deregister - Degister lport
5306 *
5307 * @vha: Registered scsi_qla_host pointer
5308 */
5309 void qlt_lport_deregister(struct scsi_qla_host *vha)
5310 {
5311 struct qla_hw_data *ha = vha->hw;
5312 struct Scsi_Host *sh = vha->host;
5313 /*
5314 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5315 */
5316 vha->vha_tgt.target_lport_ptr = NULL;
5317 ha->tgt.tgt_ops = NULL;
5318 /*
5319 * Release the Scsi_Host reference for the underlying qla2xxx host
5320 */
5321 scsi_host_put(sh);
5322 }
5323 EXPORT_SYMBOL(qlt_lport_deregister);
5324
5325 /* Must be called under HW lock */
5326 static void qlt_set_mode(struct scsi_qla_host *vha)
5327 {
5328 struct qla_hw_data *ha = vha->hw;
5329
5330 switch (ql2x_ini_mode) {
5331 case QLA2XXX_INI_MODE_DISABLED:
5332 case QLA2XXX_INI_MODE_EXCLUSIVE:
5333 vha->host->active_mode = MODE_TARGET;
5334 break;
5335 case QLA2XXX_INI_MODE_ENABLED:
5336 vha->host->active_mode |= MODE_TARGET;
5337 break;
5338 default:
5339 break;
5340 }
5341
5342 if (ha->tgt.ini_mode_force_reverse)
5343 qla_reverse_ini_mode(vha);
5344 }
5345
5346 /* Must be called under HW lock */
5347 static void qlt_clear_mode(struct scsi_qla_host *vha)
5348 {
5349 struct qla_hw_data *ha = vha->hw;
5350
5351 switch (ql2x_ini_mode) {
5352 case QLA2XXX_INI_MODE_DISABLED:
5353 vha->host->active_mode = MODE_UNKNOWN;
5354 break;
5355 case QLA2XXX_INI_MODE_EXCLUSIVE:
5356 vha->host->active_mode = MODE_INITIATOR;
5357 break;
5358 case QLA2XXX_INI_MODE_ENABLED:
5359 vha->host->active_mode &= ~MODE_TARGET;
5360 break;
5361 default:
5362 break;
5363 }
5364
5365 if (ha->tgt.ini_mode_force_reverse)
5366 qla_reverse_ini_mode(vha);
5367 }
5368
5369 /*
5370 * qla_tgt_enable_vha - NO LOCK HELD
5371 *
5372 * host_reset, bring up w/ Target Mode Enabled
5373 */
5374 void
5375 qlt_enable_vha(struct scsi_qla_host *vha)
5376 {
5377 struct qla_hw_data *ha = vha->hw;
5378 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5379 unsigned long flags;
5380 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5381
5382 if (!tgt) {
5383 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5384 "Unable to locate qla_tgt pointer from"
5385 " struct qla_hw_data\n");
5386 dump_stack();
5387 return;
5388 }
5389
5390 spin_lock_irqsave(&ha->hardware_lock, flags);
5391 tgt->tgt_stopped = 0;
5392 qlt_set_mode(vha);
5393 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5394
5395 if (vha->vp_idx) {
5396 qla24xx_disable_vp(vha);
5397 qla24xx_enable_vp(vha);
5398 } else {
5399 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5400 qla2xxx_wake_dpc(base_vha);
5401 qla2x00_wait_for_hba_online(base_vha);
5402 }
5403 }
5404 EXPORT_SYMBOL(qlt_enable_vha);
5405
5406 /*
5407 * qla_tgt_disable_vha - NO LOCK HELD
5408 *
5409 * Disable Target Mode and reset the adapter
5410 */
5411 static void qlt_disable_vha(struct scsi_qla_host *vha)
5412 {
5413 struct qla_hw_data *ha = vha->hw;
5414 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5415 unsigned long flags;
5416
5417 if (!tgt) {
5418 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5419 "Unable to locate qla_tgt pointer from"
5420 " struct qla_hw_data\n");
5421 dump_stack();
5422 return;
5423 }
5424
5425 spin_lock_irqsave(&ha->hardware_lock, flags);
5426 qlt_clear_mode(vha);
5427 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5428
5429 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5430 qla2xxx_wake_dpc(vha);
5431 qla2x00_wait_for_hba_online(vha);
5432 }
5433
5434 /*
5435 * Called from qla_init.c:qla24xx_vport_create() contex to setup
5436 * the target mode specific struct scsi_qla_host and struct qla_hw_data
5437 * members.
5438 */
5439 void
5440 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5441 {
5442 if (!qla_tgt_mode_enabled(vha))
5443 return;
5444
5445 vha->vha_tgt.qla_tgt = NULL;
5446
5447 mutex_init(&vha->vha_tgt.tgt_mutex);
5448 mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5449
5450 qlt_clear_mode(vha);
5451
5452 /*
5453 * NOTE: Currently the value is kept the same for <24xx and
5454 * >=24xx ISPs. If it is necessary to change it,
5455 * the check should be added for specific ISPs,
5456 * assigning the value appropriately.
5457 */
5458 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5459
5460 qlt_add_target(ha, vha);
5461 }
5462
5463 void
5464 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5465 {
5466 /*
5467 * FC-4 Feature bit 0 indicates target functionality to the name server.
5468 */
5469 if (qla_tgt_mode_enabled(vha)) {
5470 if (qla_ini_mode_enabled(vha))
5471 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5472 else
5473 ct_req->req.rff_id.fc4_feature = BIT_0;
5474 } else if (qla_ini_mode_enabled(vha)) {
5475 ct_req->req.rff_id.fc4_feature = BIT_1;
5476 }
5477 }
5478
5479 /*
5480 * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5481 * @ha: HA context
5482 *
5483 * Beginning of ATIO ring has initialization control block already built
5484 * by nvram config routine.
5485 *
5486 * Returns 0 on success.
5487 */
5488 void
5489 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5490 {
5491 struct qla_hw_data *ha = vha->hw;
5492 uint16_t cnt;
5493 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5494
5495 if (!qla_tgt_mode_enabled(vha))
5496 return;
5497
5498 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5499 pkt->u.raw.signature = ATIO_PROCESSED;
5500 pkt++;
5501 }
5502
5503 }
5504
5505 /*
5506 * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5507 * @ha: SCSI driver HA context
5508 */
5509 void
5510 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5511 {
5512 struct qla_hw_data *ha = vha->hw;
5513 struct atio_from_isp *pkt;
5514 int cnt, i;
5515
5516 if (!vha->flags.online)
5517 return;
5518
5519 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5520 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5521 cnt = pkt->u.raw.entry_count;
5522
5523 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5524
5525 for (i = 0; i < cnt; i++) {
5526 ha->tgt.atio_ring_index++;
5527 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5528 ha->tgt.atio_ring_index = 0;
5529 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5530 } else
5531 ha->tgt.atio_ring_ptr++;
5532
5533 pkt->u.raw.signature = ATIO_PROCESSED;
5534 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5535 }
5536 wmb();
5537 }
5538
5539 /* Adjust ring index */
5540 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5541 }
5542
5543 void
5544 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5545 {
5546 struct qla_hw_data *ha = vha->hw;
5547 if (!QLA_TGT_MODE_ENABLED())
5548 return;
5549
5550 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5551 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5552 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5553
5554 if (IS_ATIO_MSIX_CAPABLE(ha)) {
5555 struct qla_msix_entry *msix = &ha->msix_entries[2];
5556 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5557
5558 icb->msix_atio = cpu_to_le16(msix->entry);
5559 ql_dbg(ql_dbg_init, vha, 0xf072,
5560 "Registering ICB vector 0x%x for atio que.\n",
5561 msix->entry);
5562 }
5563 }
5564
5565 void
5566 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5567 {
5568 struct qla_hw_data *ha = vha->hw;
5569
5570 if (qla_tgt_mode_enabled(vha)) {
5571 if (!ha->tgt.saved_set) {
5572 /* We save only once */
5573 ha->tgt.saved_exchange_count = nv->exchange_count;
5574 ha->tgt.saved_firmware_options_1 =
5575 nv->firmware_options_1;
5576 ha->tgt.saved_firmware_options_2 =
5577 nv->firmware_options_2;
5578 ha->tgt.saved_firmware_options_3 =
5579 nv->firmware_options_3;
5580 ha->tgt.saved_set = 1;
5581 }
5582
5583 nv->exchange_count = cpu_to_le16(0xFFFF);
5584
5585 /* Enable target mode */
5586 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
5587
5588 /* Disable ini mode, if requested */
5589 if (!qla_ini_mode_enabled(vha))
5590 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
5591
5592 /* Disable Full Login after LIP */
5593 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
5594 /* Enable initial LIP */
5595 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
5596 if (ql2xtgt_tape_enable)
5597 /* Enable FC Tape support */
5598 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5599 else
5600 /* Disable FC Tape support */
5601 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5602
5603 /* Disable Full Login after LIP */
5604 nv->host_p &= cpu_to_le32(~BIT_10);
5605 /* Enable target PRLI control */
5606 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
5607 } else {
5608 if (ha->tgt.saved_set) {
5609 nv->exchange_count = ha->tgt.saved_exchange_count;
5610 nv->firmware_options_1 =
5611 ha->tgt.saved_firmware_options_1;
5612 nv->firmware_options_2 =
5613 ha->tgt.saved_firmware_options_2;
5614 nv->firmware_options_3 =
5615 ha->tgt.saved_firmware_options_3;
5616 }
5617 return;
5618 }
5619
5620 /* out-of-order frames reassembly */
5621 nv->firmware_options_3 |= BIT_6|BIT_9;
5622
5623 if (ha->tgt.enable_class_2) {
5624 if (vha->flags.init_done)
5625 fc_host_supported_classes(vha->host) =
5626 FC_COS_CLASS2 | FC_COS_CLASS3;
5627
5628 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
5629 } else {
5630 if (vha->flags.init_done)
5631 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5632
5633 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
5634 }
5635 }
5636
5637 void
5638 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5639 struct init_cb_24xx *icb)
5640 {
5641 struct qla_hw_data *ha = vha->hw;
5642
5643 if (ha->tgt.node_name_set) {
5644 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5645 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
5646 }
5647 }
5648
5649 void
5650 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5651 {
5652 struct qla_hw_data *ha = vha->hw;
5653
5654 if (!QLA_TGT_MODE_ENABLED())
5655 return;
5656
5657 if (qla_tgt_mode_enabled(vha)) {
5658 if (!ha->tgt.saved_set) {
5659 /* We save only once */
5660 ha->tgt.saved_exchange_count = nv->exchange_count;
5661 ha->tgt.saved_firmware_options_1 =
5662 nv->firmware_options_1;
5663 ha->tgt.saved_firmware_options_2 =
5664 nv->firmware_options_2;
5665 ha->tgt.saved_firmware_options_3 =
5666 nv->firmware_options_3;
5667 ha->tgt.saved_set = 1;
5668 }
5669
5670 nv->exchange_count = cpu_to_le16(0xFFFF);
5671
5672 /* Enable target mode */
5673 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
5674
5675 /* Disable ini mode, if requested */
5676 if (!qla_ini_mode_enabled(vha))
5677 nv->firmware_options_1 |= cpu_to_le32(BIT_5);
5678
5679 /* Disable Full Login after LIP */
5680 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
5681 /* Enable initial LIP */
5682 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
5683 if (ql2xtgt_tape_enable)
5684 /* Enable FC tape support */
5685 nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5686 else
5687 /* Disable FC tape support */
5688 nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5689
5690 /* Disable Full Login after LIP */
5691 nv->host_p &= cpu_to_le32(~BIT_10);
5692 /* Enable target PRLI control */
5693 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
5694 } else {
5695 if (ha->tgt.saved_set) {
5696 nv->exchange_count = ha->tgt.saved_exchange_count;
5697 nv->firmware_options_1 =
5698 ha->tgt.saved_firmware_options_1;
5699 nv->firmware_options_2 =
5700 ha->tgt.saved_firmware_options_2;
5701 nv->firmware_options_3 =
5702 ha->tgt.saved_firmware_options_3;
5703 }
5704 return;
5705 }
5706
5707 /* out-of-order frames reassembly */
5708 nv->firmware_options_3 |= BIT_6|BIT_9;
5709
5710 if (ha->tgt.enable_class_2) {
5711 if (vha->flags.init_done)
5712 fc_host_supported_classes(vha->host) =
5713 FC_COS_CLASS2 | FC_COS_CLASS3;
5714
5715 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
5716 } else {
5717 if (vha->flags.init_done)
5718 fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5719
5720 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
5721 }
5722 }
5723
5724 void
5725 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5726 struct init_cb_81xx *icb)
5727 {
5728 struct qla_hw_data *ha = vha->hw;
5729
5730 if (!QLA_TGT_MODE_ENABLED())
5731 return;
5732
5733 if (ha->tgt.node_name_set) {
5734 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5735 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
5736 }
5737 }
5738
5739 void
5740 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5741 {
5742 if (!QLA_TGT_MODE_ENABLED())
5743 return;
5744
5745 ha->msix_count += 1; /* For ATIO Q */
5746 }
5747
5748 int
5749 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5750 struct sts_entry_24xx *pkt)
5751 {
5752 switch (pkt->entry_type) {
5753 case ABTS_RECV_24XX:
5754 case ABTS_RESP_24XX:
5755 case CTIO_TYPE7:
5756 case NOTIFY_ACK_TYPE:
5757 case CTIO_CRC2:
5758 return 1;
5759 default:
5760 return 0;
5761 }
5762 }
5763
5764 void
5765 qlt_modify_vp_config(struct scsi_qla_host *vha,
5766 struct vp_config_entry_24xx *vpmod)
5767 {
5768 if (qla_tgt_mode_enabled(vha))
5769 vpmod->options_idx1 &= ~BIT_5;
5770 /* Disable ini mode, if requested */
5771 if (!qla_ini_mode_enabled(vha))
5772 vpmod->options_idx1 &= ~BIT_4;
5773 }
5774
5775 void
5776 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5777 {
5778 if (!QLA_TGT_MODE_ENABLED())
5779 return;
5780
5781 if (ha->mqenable || IS_QLA83XX(ha)) {
5782 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5783 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5784 } else {
5785 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5786 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5787 }
5788
5789 mutex_init(&base_vha->vha_tgt.tgt_mutex);
5790 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5791 qlt_clear_mode(base_vha);
5792 }
5793
5794 irqreturn_t
5795 qla83xx_msix_atio_q(int irq, void *dev_id)
5796 {
5797 struct rsp_que *rsp;
5798 scsi_qla_host_t *vha;
5799 struct qla_hw_data *ha;
5800 unsigned long flags;
5801
5802 rsp = (struct rsp_que *) dev_id;
5803 ha = rsp->hw;
5804 vha = pci_get_drvdata(ha->pdev);
5805
5806 spin_lock_irqsave(&ha->hardware_lock, flags);
5807
5808 qlt_24xx_process_atio_queue(vha);
5809 qla24xx_process_response_queue(vha, rsp);
5810
5811 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5812
5813 return IRQ_HANDLED;
5814 }
5815
5816 int
5817 qlt_mem_alloc(struct qla_hw_data *ha)
5818 {
5819 if (!QLA_TGT_MODE_ENABLED())
5820 return 0;
5821
5822 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5823 MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5824 if (!ha->tgt.tgt_vp_map)
5825 return -ENOMEM;
5826
5827 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5828 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5829 &ha->tgt.atio_dma, GFP_KERNEL);
5830 if (!ha->tgt.atio_ring) {
5831 kfree(ha->tgt.tgt_vp_map);
5832 return -ENOMEM;
5833 }
5834 return 0;
5835 }
5836
5837 void
5838 qlt_mem_free(struct qla_hw_data *ha)
5839 {
5840 if (!QLA_TGT_MODE_ENABLED())
5841 return;
5842
5843 if (ha->tgt.atio_ring) {
5844 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5845 sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5846 ha->tgt.atio_dma);
5847 }
5848 kfree(ha->tgt.tgt_vp_map);
5849 }
5850
5851 /* vport_slock to be held by the caller */
5852 void
5853 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5854 {
5855 if (!QLA_TGT_MODE_ENABLED())
5856 return;
5857
5858 switch (cmd) {
5859 case SET_VP_IDX:
5860 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5861 break;
5862 case SET_AL_PA:
5863 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5864 break;
5865 case RESET_VP_IDX:
5866 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5867 break;
5868 case RESET_AL_PA:
5869 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5870 break;
5871 }
5872 }
5873
5874 static int __init qlt_parse_ini_mode(void)
5875 {
5876 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5877 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5878 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5879 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5880 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5881 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5882 else
5883 return false;
5884
5885 return true;
5886 }
5887
5888 int __init qlt_init(void)
5889 {
5890 int ret;
5891
5892 if (!qlt_parse_ini_mode()) {
5893 ql_log(ql_log_fatal, NULL, 0xe06b,
5894 "qlt_parse_ini_mode() failed\n");
5895 return -EINVAL;
5896 }
5897
5898 if (!QLA_TGT_MODE_ENABLED())
5899 return 0;
5900
5901 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5902 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5903 qla_tgt_mgmt_cmd), 0, NULL);
5904 if (!qla_tgt_mgmt_cmd_cachep) {
5905 ql_log(ql_log_fatal, NULL, 0xe06d,
5906 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5907 return -ENOMEM;
5908 }
5909
5910 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5911 mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5912 if (!qla_tgt_mgmt_cmd_mempool) {
5913 ql_log(ql_log_fatal, NULL, 0xe06e,
5914 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5915 ret = -ENOMEM;
5916 goto out_mgmt_cmd_cachep;
5917 }
5918
5919 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5920 if (!qla_tgt_wq) {
5921 ql_log(ql_log_fatal, NULL, 0xe06f,
5922 "alloc_workqueue for qla_tgt_wq failed\n");
5923 ret = -ENOMEM;
5924 goto out_cmd_mempool;
5925 }
5926 /*
5927 * Return 1 to signal that initiator-mode is being disabled
5928 */
5929 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5930
5931 out_cmd_mempool:
5932 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5933 out_mgmt_cmd_cachep:
5934 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5935 return ret;
5936 }
5937
5938 void qlt_exit(void)
5939 {
5940 if (!QLA_TGT_MODE_ENABLED())
5941 return;
5942
5943 destroy_workqueue(qla_tgt_wq);
5944 mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5945 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5946 }