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