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blk-mq: always free hctx after request queue is freed
[linux/fpc-iii.git] / drivers / scsi / qla2xxx / tcm_qla2xxx.c
blob8a3075d17c63ccbd9a617b754f51b343b3abbc33
1 /*******************************************************************************
2 * This file contains tcm implementation using v4 configfs fabric infrastructure
3 * for QLogic target mode HBAs
4 *
5 * (c) Copyright 2010-2013 Datera, Inc.
6 *
7 * Author: Nicholas A. Bellinger <nab@daterainc.com>
8 *
9 * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
10 * the TCM_FC / Open-FCoE.org fabric module.
11 *
12 * Copyright (c) 2010 Cisco Systems, Inc
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 ****************************************************************************/
24
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/utsname.h>
29 #include <linux/vmalloc.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/slab.h>
33 #include <linux/kthread.h>
34 #include <linux/types.h>
35 #include <linux/string.h>
36 #include <linux/configfs.h>
37 #include <linux/ctype.h>
38 #include <asm/unaligned.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_cmnd.h>
43 #include <target/target_core_base.h>
44 #include <target/target_core_fabric.h>
45
46 #include "qla_def.h"
47 #include "qla_target.h"
48 #include "tcm_qla2xxx.h"
49
50 static struct workqueue_struct *tcm_qla2xxx_free_wq;
51
52 /*
53 * Parse WWN.
54 * If strict, we require lower-case hex and colon separators to be sure
55 * the name is the same as what would be generated by ft_format_wwn()
56 * so the name and wwn are mapped one-to-one.
57 */
58 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
59 {
60 const char *cp;
61 char c;
62 u32 nibble;
63 u32 byte = 0;
64 u32 pos = 0;
65 u32 err;
66
67 *wwn = 0;
68 for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
69 c = *cp;
70 if (c == '\n' && cp[1] == '\0')
71 continue;
72 if (strict && pos++ == 2 && byte++ < 7) {
73 pos = 0;
74 if (c == ':')
75 continue;
76 err = 1;
77 goto fail;
78 }
79 if (c == '\0') {
80 err = 2;
81 if (strict && byte != 8)
82 goto fail;
83 return cp - name;
84 }
85 err = 3;
86 if (isdigit(c))
87 nibble = c - '0';
88 else if (isxdigit(c) && (islower(c) || !strict))
89 nibble = tolower(c) - 'a' + 10;
90 else
91 goto fail;
92 *wwn = (*wwn << 4) | nibble;
93 }
94 err = 4;
95 fail:
96 pr_debug("err %u len %zu pos %u byte %u\n",
97 err, cp - name, pos, byte);
98 return -1;
99 }
100
101 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
102 {
103 u8 b[8];
104
105 put_unaligned_be64(wwn, b);
106 return snprintf(buf, len,
107 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
108 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
109 }
110
111 /*
112 * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
113 */
114 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
115 {
116 unsigned int i, j;
117 u8 wwn[8];
118
119 memset(wwn, 0, sizeof(wwn));
120
121 /* Validate and store the new name */
122 for (i = 0, j = 0; i < 16; i++) {
123 int value;
124
125 value = hex_to_bin(*ns++);
126 if (value >= 0)
127 j = (j << 4) | value;
128 else
129 return -EINVAL;
130
131 if (i % 2) {
132 wwn[i/2] = j & 0xff;
133 j = 0;
134 }
135 }
136
137 *nm = wwn_to_u64(wwn);
138 return 0;
139 }
140
141 /*
142 * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
143 * store_fc_host_vport_create()
144 */
145 static int tcm_qla2xxx_npiv_parse_wwn(
146 const char *name,
147 size_t count,
148 u64 *wwpn,
149 u64 *wwnn)
150 {
151 unsigned int cnt = count;
152 int rc;
153
154 *wwpn = 0;
155 *wwnn = 0;
156
157 /* count may include a LF at end of string */
158 if (name[cnt-1] == '\n' || name[cnt-1] == 0)
159 cnt--;
160
161 /* validate we have enough characters for WWPN */
162 if ((cnt != (16+1+16)) || (name[16] != ':'))
163 return -EINVAL;
164
165 rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
166 if (rc != 0)
167 return rc;
168
169 rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
170 if (rc != 0)
171 return rc;
172
173 return 0;
174 }
175
176 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
177 {
178 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
179 struct tcm_qla2xxx_tpg, se_tpg);
180 struct tcm_qla2xxx_lport *lport = tpg->lport;
181
182 return lport->lport_naa_name;
183 }
184
185 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
186 {
187 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
188 struct tcm_qla2xxx_tpg, se_tpg);
189 return tpg->lport_tpgt;
190 }
191
192 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
193 {
194 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
195 struct tcm_qla2xxx_tpg, se_tpg);
196
197 return tpg->tpg_attrib.generate_node_acls;
198 }
199
200 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
201 {
202 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
203 struct tcm_qla2xxx_tpg, se_tpg);
204
205 return tpg->tpg_attrib.cache_dynamic_acls;
206 }
207
208 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
209 {
210 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
211 struct tcm_qla2xxx_tpg, se_tpg);
212
213 return tpg->tpg_attrib.demo_mode_write_protect;
214 }
215
216 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
217 {
218 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
219 struct tcm_qla2xxx_tpg, se_tpg);
220
221 return tpg->tpg_attrib.prod_mode_write_protect;
222 }
223
224 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
225 {
226 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
227 struct tcm_qla2xxx_tpg, se_tpg);
228
229 return tpg->tpg_attrib.demo_mode_login_only;
230 }
231
232 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
233 {
234 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
235 struct tcm_qla2xxx_tpg, se_tpg);
236
237 return tpg->tpg_attrib.fabric_prot_type;
238 }
239
240 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
241 {
242 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
243 struct tcm_qla2xxx_tpg, se_tpg);
244
245 return tpg->lport_tpgt;
246 }
247
248 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
249 {
250 struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
251 struct qla_tgt_mgmt_cmd, free_work);
252
253 transport_generic_free_cmd(&mcmd->se_cmd, 0);
254 }
255
256 /*
257 * Called from qla_target_template->free_mcmd(), and will call
258 * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
259 * release callback. qla_hw_data->hardware_lock is expected to be held
260 */
261 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
262 {
263 INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
264 queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
265 }
266
267 static void tcm_qla2xxx_complete_free(struct work_struct *work)
268 {
269 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
270 bool released = false;
271 unsigned long flags;
272
273 cmd->cmd_in_wq = 0;
274
275 WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
276
277 spin_lock_irqsave(&cmd->cmd_lock, flags);
278 cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
279 cmd->trc_flags |= TRC_CMD_FREE;
280 cmd->cmd_sent_to_fw = 0;
281 if (cmd->released)
282 released = true;
283 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
284
285 if (released)
286 qlt_free_cmd(cmd);
287 else
288 transport_generic_free_cmd(&cmd->se_cmd, 0);
289 }
290
291 /*
292 * Called from qla_target_template->free_cmd(), and will call
293 * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
294 * release callback. qla_hw_data->hardware_lock is expected to be held
295 */
296 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
297 {
298 cmd->qpair->tgt_counters.core_qla_free_cmd++;
299 cmd->cmd_in_wq = 1;
300
301 WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
302 cmd->trc_flags |= TRC_CMD_DONE;
303
304 INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
305 queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
306 }
307
308 /*
309 * Called from struct target_core_fabric_ops->check_stop_free() context
310 */
311 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
312 {
313 struct qla_tgt_cmd *cmd;
314
315 if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
316 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
317 cmd->trc_flags |= TRC_CMD_CHK_STOP;
318 }
319
320 return target_put_sess_cmd(se_cmd);
321 }
322
323 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
324 * fabric descriptor @se_cmd command to release
325 */
326 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
327 {
328 struct qla_tgt_cmd *cmd;
329 unsigned long flags;
330
331 if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
332 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
333 struct qla_tgt_mgmt_cmd, se_cmd);
334 qlt_free_mcmd(mcmd);
335 return;
336 }
337 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
338
339 spin_lock_irqsave(&cmd->cmd_lock, flags);
340 if (cmd->cmd_sent_to_fw) {
341 cmd->released = 1;
342 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
343 } else {
344 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
345 qlt_free_cmd(cmd);
346 }
347 }
348
349 static void tcm_qla2xxx_release_session(struct kref *kref)
350 {
351 struct fc_port *sess = container_of(kref,
352 struct fc_port, sess_kref);
353
354 qlt_unreg_sess(sess);
355 }
356
357 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
358 {
359 if (!sess)
360 return;
361
362 assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
363 kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
364 }
365
366 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
367 {
368 struct fc_port *sess = se_sess->fabric_sess_ptr;
369 struct scsi_qla_host *vha;
370 unsigned long flags;
371
372 BUG_ON(!sess);
373 vha = sess->vha;
374
375 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
376 target_sess_cmd_list_set_waiting(se_sess);
377 tcm_qla2xxx_put_sess(sess);
378 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
379 }
380
381 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
382 {
383 return 0;
384 }
385
386 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
387 {
388 struct qla_tgt_cmd *cmd = container_of(se_cmd,
389 struct qla_tgt_cmd, se_cmd);
390
391 if (cmd->aborted) {
392 /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
393 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
394 * already kick start the free.
395 */
396 pr_debug("write_pending aborted cmd[%p] refcount %d "
397 "transport_state %x, t_state %x, se_cmd_flags %x\n",
398 cmd, kref_read(&cmd->se_cmd.cmd_kref),
399 cmd->se_cmd.transport_state,
400 cmd->se_cmd.t_state,
401 cmd->se_cmd.se_cmd_flags);
402 return 0;
403 }
404 cmd->trc_flags |= TRC_XFR_RDY;
405 cmd->bufflen = se_cmd->data_length;
406 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
407
408 cmd->sg_cnt = se_cmd->t_data_nents;
409 cmd->sg = se_cmd->t_data_sg;
410
411 cmd->prot_sg_cnt = se_cmd->t_prot_nents;
412 cmd->prot_sg = se_cmd->t_prot_sg;
413 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size;
414 se_cmd->pi_err = 0;
415
416 /*
417 * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
418 * the SGL mappings into PCIe memory for incoming FCP WRITE data.
419 */
420 return qlt_rdy_to_xfer(cmd);
421 }
422
423 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
424 {
425 return;
426 }
427
428 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
429 {
430 if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
431 struct qla_tgt_cmd *cmd = container_of(se_cmd,
432 struct qla_tgt_cmd, se_cmd);
433 return cmd->state;
434 }
435
436 return 0;
437 }
438
439 /*
440 * Called from process context in qla_target.c:qlt_do_work() code
441 */
442 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
443 unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
444 int data_dir, int bidi)
445 {
446 struct se_cmd *se_cmd = &cmd->se_cmd;
447 struct se_session *se_sess;
448 struct fc_port *sess;
449 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
450 struct se_portal_group *se_tpg;
451 struct tcm_qla2xxx_tpg *tpg;
452 #endif
453 int flags = TARGET_SCF_ACK_KREF;
454
455 if (bidi)
456 flags |= TARGET_SCF_BIDI_OP;
457
458 if (se_cmd->cpuid != WORK_CPU_UNBOUND)
459 flags |= TARGET_SCF_USE_CPUID;
460
461 sess = cmd->sess;
462 if (!sess) {
463 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
464 return -EINVAL;
465 }
466
467 se_sess = sess->se_sess;
468 if (!se_sess) {
469 pr_err("Unable to locate active struct se_session\n");
470 return -EINVAL;
471 }
472
473 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
474 se_tpg = se_sess->se_tpg;
475 tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
476 if (unlikely(tpg->tpg_attrib.jam_host)) {
477 /* return, and dont run target_submit_cmd,discarding command */
478 return 0;
479 }
480 #endif
481
482 cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
483 return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
484 cmd->unpacked_lun, data_length, fcp_task_attr,
485 data_dir, flags);
486 }
487
488 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
489 {
490 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
491 unsigned long flags;
492
493 /*
494 * Ensure that the complete FCP WRITE payload has been received.
495 * Otherwise return an exception via CHECK_CONDITION status.
496 */
497 cmd->cmd_in_wq = 0;
498
499 spin_lock_irqsave(&cmd->cmd_lock, flags);
500 cmd->cmd_sent_to_fw = 0;
501
502 if (cmd->released) {
503 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
504 qlt_free_cmd(cmd);
505 return;
506 }
507
508 cmd->data_work = 1;
509 if (cmd->aborted) {
510 cmd->data_work_free = 1;
511 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
512
513 tcm_qla2xxx_free_cmd(cmd);
514 return;
515 }
516 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
517
518 cmd->qpair->tgt_counters.qla_core_ret_ctio++;
519 if (!cmd->write_data_transferred) {
520 switch (cmd->dif_err_code) {
521 case DIF_ERR_GRD:
522 cmd->se_cmd.pi_err =
523 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
524 break;
525 case DIF_ERR_REF:
526 cmd->se_cmd.pi_err =
527 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
528 break;
529 case DIF_ERR_APP:
530 cmd->se_cmd.pi_err =
531 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
532 break;
533 case DIF_ERR_NONE:
534 default:
535 break;
536 }
537
538 if (cmd->se_cmd.pi_err)
539 transport_generic_request_failure(&cmd->se_cmd,
540 cmd->se_cmd.pi_err);
541 else
542 transport_generic_request_failure(&cmd->se_cmd,
543 TCM_CHECK_CONDITION_ABORT_CMD);
544
545 return;
546 }
547
548 return target_execute_cmd(&cmd->se_cmd);
549 }
550
551 /*
552 * Called from qla_target.c:qlt_do_ctio_completion()
553 */
554 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
555 {
556 cmd->trc_flags |= TRC_DATA_IN;
557 cmd->cmd_in_wq = 1;
558 INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
559 queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
560 }
561
562 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
563 {
564 return 0;
565 }
566
567 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
568 uint16_t *pfw_prot_opts)
569 {
570 struct se_cmd *se_cmd = &cmd->se_cmd;
571
572 if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
573 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
574
575 if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
576 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
577
578 return 0;
579 }
580
581 /*
582 * Called from qla_target.c:qlt_issue_task_mgmt()
583 */
584 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
585 uint16_t tmr_func, uint32_t tag)
586 {
587 struct fc_port *sess = mcmd->sess;
588 struct se_cmd *se_cmd = &mcmd->se_cmd;
589 int transl_tmr_func = 0;
590 int flags = TARGET_SCF_ACK_KREF;
591
592 switch (tmr_func) {
593 case QLA_TGT_ABTS:
594 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
595 transl_tmr_func = TMR_ABORT_TASK;
596 flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
597 break;
598 case QLA_TGT_2G_ABORT_TASK:
599 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
600 transl_tmr_func = TMR_ABORT_TASK;
601 break;
602 case QLA_TGT_CLEAR_ACA:
603 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
604 transl_tmr_func = TMR_CLEAR_ACA;
605 break;
606 case QLA_TGT_TARGET_RESET:
607 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
608 transl_tmr_func = TMR_TARGET_WARM_RESET;
609 break;
610 case QLA_TGT_LUN_RESET:
611 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
612 transl_tmr_func = TMR_LUN_RESET;
613 break;
614 case QLA_TGT_CLEAR_TS:
615 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
616 transl_tmr_func = TMR_CLEAR_TASK_SET;
617 break;
618 case QLA_TGT_ABORT_TS:
619 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
620 transl_tmr_func = TMR_ABORT_TASK_SET;
621 break;
622 default:
623 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
624 sess->vha->host_no, tmr_func);
625 return -ENOSYS;
626 }
627
628 return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
629 transl_tmr_func, GFP_ATOMIC, tag, flags);
630 }
631
632 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
633 uint64_t tag)
634 {
635 struct qla_tgt_cmd *cmd = NULL;
636 struct se_cmd *secmd;
637 unsigned long flags;
638
639 if (!sess->se_sess)
640 return NULL;
641
642 spin_lock_irqsave(&sess->se_sess->sess_cmd_lock, flags);
643 list_for_each_entry(secmd, &sess->se_sess->sess_cmd_list, se_cmd_list) {
644 /* skip task management functions, including tmr->task_cmd */
645 if (secmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
646 continue;
647
648 if (secmd->tag == tag) {
649 cmd = container_of(secmd, struct qla_tgt_cmd, se_cmd);
650 break;
651 }
652 }
653 spin_unlock_irqrestore(&sess->se_sess->sess_cmd_lock, flags);
654
655 return cmd;
656 }
657
658 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
659 {
660 struct qla_tgt_cmd *cmd = container_of(se_cmd,
661 struct qla_tgt_cmd, se_cmd);
662
663 if (cmd->aborted) {
664 /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
665 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
666 * already kick start the free.
667 */
668 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
669 "transport_state %x, t_state %x, se_cmd_flags %x\n",
670 cmd, kref_read(&cmd->se_cmd.cmd_kref),
671 cmd->se_cmd.transport_state,
672 cmd->se_cmd.t_state,
673 cmd->se_cmd.se_cmd_flags);
674 return 0;
675 }
676
677 cmd->trc_flags |= TRC_XMIT_DATA;
678 cmd->bufflen = se_cmd->data_length;
679 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
680
681 cmd->sg_cnt = se_cmd->t_data_nents;
682 cmd->sg = se_cmd->t_data_sg;
683 cmd->offset = 0;
684
685 cmd->prot_sg_cnt = se_cmd->t_prot_nents;
686 cmd->prot_sg = se_cmd->t_prot_sg;
687 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size;
688 se_cmd->pi_err = 0;
689
690 /*
691 * Now queue completed DATA_IN the qla2xxx LLD and response ring
692 */
693 return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
694 se_cmd->scsi_status);
695 }
696
697 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
698 {
699 struct qla_tgt_cmd *cmd = container_of(se_cmd,
700 struct qla_tgt_cmd, se_cmd);
701 int xmit_type = QLA_TGT_XMIT_STATUS;
702
703 if (cmd->aborted) {
704 /*
705 * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
706 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
707 * already kick start the free.
708 */
709 pr_debug(
710 "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
711 cmd, kref_read(&cmd->se_cmd.cmd_kref),
712 cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
713 cmd->se_cmd.se_cmd_flags);
714 return 0;
715 }
716 cmd->bufflen = se_cmd->data_length;
717 cmd->sg = NULL;
718 cmd->sg_cnt = 0;
719 cmd->offset = 0;
720 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
721 cmd->trc_flags |= TRC_XMIT_STATUS;
722
723 if (se_cmd->data_direction == DMA_FROM_DEVICE) {
724 /*
725 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
726 * for qla_tgt_xmit_response LLD code
727 */
728 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
729 se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
730 se_cmd->residual_count = 0;
731 }
732 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
733 se_cmd->residual_count += se_cmd->data_length;
734
735 cmd->bufflen = 0;
736 }
737 /*
738 * Now queue status response to qla2xxx LLD code and response ring
739 */
740 return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
741 }
742
743 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
744 {
745 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
746 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
747 struct qla_tgt_mgmt_cmd, se_cmd);
748
749 pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
750 mcmd, se_tmr->function, se_tmr->response);
751 /*
752 * Do translation between TCM TM response codes and
753 * QLA2xxx FC TM response codes.
754 */
755 switch (se_tmr->response) {
756 case TMR_FUNCTION_COMPLETE:
757 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
758 break;
759 case TMR_TASK_DOES_NOT_EXIST:
760 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
761 break;
762 case TMR_FUNCTION_REJECTED:
763 mcmd->fc_tm_rsp = FC_TM_REJECT;
764 break;
765 case TMR_LUN_DOES_NOT_EXIST:
766 default:
767 mcmd->fc_tm_rsp = FC_TM_FAILED;
768 break;
769 }
770 /*
771 * Queue the TM response to QLA2xxx LLD to build a
772 * CTIO response packet.
773 */
774 qlt_xmit_tm_rsp(mcmd);
775 }
776
777 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
778 {
779 struct qla_tgt_cmd *cmd = container_of(se_cmd,
780 struct qla_tgt_cmd, se_cmd);
781
782 if (qlt_abort_cmd(cmd))
783 return;
784 }
785
786 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
787 struct tcm_qla2xxx_nacl *, struct fc_port *);
788 /*
789 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
790 */
791 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
792 {
793 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
794 struct se_portal_group *se_tpg = se_nacl->se_tpg;
795 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
796 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
797 struct tcm_qla2xxx_lport, lport_wwn);
798 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
799 struct tcm_qla2xxx_nacl, se_node_acl);
800 void *node;
801
802 pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
803
804 node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
805 if (WARN_ON(node && (node != se_nacl))) {
806 /*
807 * The nacl no longer matches what we think it should be.
808 * Most likely a new dynamic acl has been added while
809 * someone dropped the hardware lock. It clearly is a
810 * bug elsewhere, but this bit can't make things worse.
811 */
812 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
813 node, GFP_ATOMIC);
814 }
815
816 pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
817 se_nacl, nacl->nport_wwnn, nacl->nport_id);
818 /*
819 * Now clear the se_nacl and session pointers from our HW lport lookup
820 * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
821 *
822 * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
823 * target_wait_for_sess_cmds() before the session waits for outstanding
824 * I/O to complete, to avoid a race between session shutdown execution
825 * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
826 */
827 tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
828 }
829
830 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
831 {
832 assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
833 target_sess_cmd_list_set_waiting(sess->se_sess);
834 }
835
836 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
837 const char *name)
838 {
839 struct tcm_qla2xxx_nacl *nacl =
840 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
841 u64 wwnn;
842
843 if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
844 return -EINVAL;
845
846 nacl->nport_wwnn = wwnn;
847 tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
848
849 return 0;
850 }
851
852 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
853
854 #define DEF_QLA_TPG_ATTRIB(name) \
855 \
856 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show( \
857 struct config_item *item, char *page) \
858 { \
859 struct se_portal_group *se_tpg = attrib_to_tpg(item); \
860 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
861 struct tcm_qla2xxx_tpg, se_tpg); \
862 \
863 return sprintf(page, "%u\n", tpg->tpg_attrib.name); \
864 } \
865 \
866 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store( \
867 struct config_item *item, const char *page, size_t count) \
868 { \
869 struct se_portal_group *se_tpg = attrib_to_tpg(item); \
870 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
871 struct tcm_qla2xxx_tpg, se_tpg); \
872 struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib; \
873 unsigned long val; \
874 int ret; \
875 \
876 ret = kstrtoul(page, 0, &val); \
877 if (ret < 0) { \
878 pr_err("kstrtoul() failed with" \
879 " ret: %d\n", ret); \
880 return -EINVAL; \
881 } \
882 \
883 if ((val != 0) && (val != 1)) { \
884 pr_err("Illegal boolean value %lu\n", val); \
885 return -EINVAL; \
886 } \
887 \
888 a->name = val; \
889 \
890 return count; \
891 } \
892 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
893
894 DEF_QLA_TPG_ATTRIB(generate_node_acls);
895 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
896 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
897 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
898 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
899 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
900 DEF_QLA_TPG_ATTRIB(jam_host);
901 #endif
902
903 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
904 &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
905 &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
906 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
907 &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
908 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
909 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
910 &tcm_qla2xxx_tpg_attrib_attr_jam_host,
911 #endif
912 NULL,
913 };
914
915 /* End items for tcm_qla2xxx_tpg_attrib_cit */
916
917 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
918 char *page)
919 {
920 struct se_portal_group *se_tpg = to_tpg(item);
921 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
922 struct tcm_qla2xxx_tpg, se_tpg);
923
924 return snprintf(page, PAGE_SIZE, "%d\n",
925 atomic_read(&tpg->lport_tpg_enabled));
926 }
927
928 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
929 const char *page, size_t count)
930 {
931 struct se_portal_group *se_tpg = to_tpg(item);
932 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
933 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
934 struct tcm_qla2xxx_lport, lport_wwn);
935 struct scsi_qla_host *vha = lport->qla_vha;
936 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
937 struct tcm_qla2xxx_tpg, se_tpg);
938 unsigned long op;
939 int rc;
940
941 rc = kstrtoul(page, 0, &op);
942 if (rc < 0) {
943 pr_err("kstrtoul() returned %d\n", rc);
944 return -EINVAL;
945 }
946 if ((op != 1) && (op != 0)) {
947 pr_err("Illegal value for tpg_enable: %lu\n", op);
948 return -EINVAL;
949 }
950 if (op) {
951 if (atomic_read(&tpg->lport_tpg_enabled))
952 return -EEXIST;
953
954 atomic_set(&tpg->lport_tpg_enabled, 1);
955 qlt_enable_vha(vha);
956 } else {
957 if (!atomic_read(&tpg->lport_tpg_enabled))
958 return count;
959
960 atomic_set(&tpg->lport_tpg_enabled, 0);
961 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
962 }
963
964 return count;
965 }
966
967 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
968 char *page)
969 {
970 return target_show_dynamic_sessions(to_tpg(item), page);
971 }
972
973 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
974 const char *page, size_t count)
975 {
976 struct se_portal_group *se_tpg = to_tpg(item);
977 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
978 struct tcm_qla2xxx_tpg, se_tpg);
979 unsigned long val;
980 int ret = kstrtoul(page, 0, &val);
981
982 if (ret) {
983 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
984 return ret;
985 }
986 if (val != 0 && val != 1 && val != 3) {
987 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
988 return -EINVAL;
989 }
990 tpg->tpg_attrib.fabric_prot_type = val;
991
992 return count;
993 }
994
995 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
996 char *page)
997 {
998 struct se_portal_group *se_tpg = to_tpg(item);
999 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1000 struct tcm_qla2xxx_tpg, se_tpg);
1001
1002 return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1003 }
1004
1005 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1006 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1007 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1008
1009 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1010 &tcm_qla2xxx_tpg_attr_enable,
1011 &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1012 &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1013 NULL,
1014 };
1015
1016 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
1017 const char *name)
1018 {
1019 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1020 struct tcm_qla2xxx_lport, lport_wwn);
1021 struct tcm_qla2xxx_tpg *tpg;
1022 unsigned long tpgt;
1023 int ret;
1024
1025 if (strstr(name, "tpgt_") != name)
1026 return ERR_PTR(-EINVAL);
1027 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1028 return ERR_PTR(-EINVAL);
1029
1030 if ((tpgt != 1)) {
1031 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1032 return ERR_PTR(-ENOSYS);
1033 }
1034
1035 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1036 if (!tpg) {
1037 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1038 return ERR_PTR(-ENOMEM);
1039 }
1040 tpg->lport = lport;
1041 tpg->lport_tpgt = tpgt;
1042 /*
1043 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1044 * NodeACLs
1045 */
1046 tpg->tpg_attrib.generate_node_acls = 1;
1047 tpg->tpg_attrib.demo_mode_write_protect = 1;
1048 tpg->tpg_attrib.cache_dynamic_acls = 1;
1049 tpg->tpg_attrib.demo_mode_login_only = 1;
1050 tpg->tpg_attrib.jam_host = 0;
1051
1052 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1053 if (ret < 0) {
1054 kfree(tpg);
1055 return NULL;
1056 }
1057
1058 lport->tpg_1 = tpg;
1059
1060 return &tpg->se_tpg;
1061 }
1062
1063 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1064 {
1065 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1066 struct tcm_qla2xxx_tpg, se_tpg);
1067 struct tcm_qla2xxx_lport *lport = tpg->lport;
1068 struct scsi_qla_host *vha = lport->qla_vha;
1069 /*
1070 * Call into qla2x_target.c LLD logic to shutdown the active
1071 * FC Nexuses and disable target mode operation for this qla_hw_data
1072 */
1073 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1074 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1075
1076 core_tpg_deregister(se_tpg);
1077 /*
1078 * Clear local TPG=1 pointer for non NPIV mode.
1079 */
1080 lport->tpg_1 = NULL;
1081 kfree(tpg);
1082 }
1083
1084 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1085 char *page)
1086 {
1087 return tcm_qla2xxx_tpg_enable_show(item, page);
1088 }
1089
1090 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1091 const char *page, size_t count)
1092 {
1093 struct se_portal_group *se_tpg = to_tpg(item);
1094 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1095 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1096 struct tcm_qla2xxx_lport, lport_wwn);
1097 struct scsi_qla_host *vha = lport->qla_vha;
1098 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1099 struct tcm_qla2xxx_tpg, se_tpg);
1100 unsigned long op;
1101 int rc;
1102
1103 rc = kstrtoul(page, 0, &op);
1104 if (rc < 0) {
1105 pr_err("kstrtoul() returned %d\n", rc);
1106 return -EINVAL;
1107 }
1108 if ((op != 1) && (op != 0)) {
1109 pr_err("Illegal value for tpg_enable: %lu\n", op);
1110 return -EINVAL;
1111 }
1112 if (op) {
1113 if (atomic_read(&tpg->lport_tpg_enabled))
1114 return -EEXIST;
1115
1116 atomic_set(&tpg->lport_tpg_enabled, 1);
1117 qlt_enable_vha(vha);
1118 } else {
1119 if (!atomic_read(&tpg->lport_tpg_enabled))
1120 return count;
1121
1122 atomic_set(&tpg->lport_tpg_enabled, 0);
1123 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1124 }
1125
1126 return count;
1127 }
1128
1129 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1130
1131 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1132 &tcm_qla2xxx_npiv_tpg_attr_enable,
1133 NULL,
1134 };
1135
1136 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1137 const char *name)
1138 {
1139 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1140 struct tcm_qla2xxx_lport, lport_wwn);
1141 struct tcm_qla2xxx_tpg *tpg;
1142 unsigned long tpgt;
1143 int ret;
1144
1145 if (strstr(name, "tpgt_") != name)
1146 return ERR_PTR(-EINVAL);
1147 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1148 return ERR_PTR(-EINVAL);
1149
1150 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1151 if (!tpg) {
1152 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1153 return ERR_PTR(-ENOMEM);
1154 }
1155 tpg->lport = lport;
1156 tpg->lport_tpgt = tpgt;
1157
1158 /*
1159 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1160 * NodeACLs
1161 */
1162 tpg->tpg_attrib.generate_node_acls = 1;
1163 tpg->tpg_attrib.demo_mode_write_protect = 1;
1164 tpg->tpg_attrib.cache_dynamic_acls = 1;
1165 tpg->tpg_attrib.demo_mode_login_only = 1;
1166
1167 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1168 if (ret < 0) {
1169 kfree(tpg);
1170 return NULL;
1171 }
1172 lport->tpg_1 = tpg;
1173 return &tpg->se_tpg;
1174 }
1175
1176 /*
1177 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1178 */
1179 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1180 scsi_qla_host_t *vha,
1181 const uint8_t *s_id)
1182 {
1183 struct tcm_qla2xxx_lport *lport;
1184 struct se_node_acl *se_nacl;
1185 struct tcm_qla2xxx_nacl *nacl;
1186 u32 key;
1187
1188 lport = vha->vha_tgt.target_lport_ptr;
1189 if (!lport) {
1190 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1191 dump_stack();
1192 return NULL;
1193 }
1194
1195 key = sid_to_key(s_id);
1196 pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1197
1198 se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1199 if (!se_nacl) {
1200 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1201 return NULL;
1202 }
1203 pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1204 se_nacl, se_nacl->initiatorname);
1205
1206 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1207 if (!nacl->fc_port) {
1208 pr_err("Unable to locate struct fc_port\n");
1209 return NULL;
1210 }
1211
1212 return nacl->fc_port;
1213 }
1214
1215 /*
1216 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1217 */
1218 static void tcm_qla2xxx_set_sess_by_s_id(
1219 struct tcm_qla2xxx_lport *lport,
1220 struct se_node_acl *new_se_nacl,
1221 struct tcm_qla2xxx_nacl *nacl,
1222 struct se_session *se_sess,
1223 struct fc_port *fc_port,
1224 uint8_t *s_id)
1225 {
1226 u32 key;
1227 void *slot;
1228 int rc;
1229
1230 key = sid_to_key(s_id);
1231 pr_debug("set_sess_by_s_id: %06x\n", key);
1232
1233 slot = btree_lookup32(&lport->lport_fcport_map, key);
1234 if (!slot) {
1235 if (new_se_nacl) {
1236 pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1237 nacl->nport_id = key;
1238 rc = btree_insert32(&lport->lport_fcport_map, key,
1239 new_se_nacl, GFP_ATOMIC);
1240 if (rc)
1241 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1242 (int)key);
1243 } else {
1244 pr_debug("Wiping nonexisting fc_port entry\n");
1245 }
1246
1247 fc_port->se_sess = se_sess;
1248 nacl->fc_port = fc_port;
1249 return;
1250 }
1251
1252 if (nacl->fc_port) {
1253 if (new_se_nacl == NULL) {
1254 pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1255 btree_remove32(&lport->lport_fcport_map, key);
1256 nacl->fc_port = NULL;
1257 return;
1258 }
1259 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1260 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1261 fc_port->se_sess = se_sess;
1262 nacl->fc_port = fc_port;
1263 return;
1264 }
1265
1266 if (new_se_nacl == NULL) {
1267 pr_debug("Clearing existing fc_port entry\n");
1268 btree_remove32(&lport->lport_fcport_map, key);
1269 return;
1270 }
1271
1272 pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1273 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1274 fc_port->se_sess = se_sess;
1275 nacl->fc_port = fc_port;
1276
1277 pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1278 nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1279 }
1280
1281 /*
1282 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1283 */
1284 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1285 scsi_qla_host_t *vha,
1286 const uint16_t loop_id)
1287 {
1288 struct tcm_qla2xxx_lport *lport;
1289 struct se_node_acl *se_nacl;
1290 struct tcm_qla2xxx_nacl *nacl;
1291 struct tcm_qla2xxx_fc_loopid *fc_loopid;
1292
1293 lport = vha->vha_tgt.target_lport_ptr;
1294 if (!lport) {
1295 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1296 dump_stack();
1297 return NULL;
1298 }
1299
1300 pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1301
1302 fc_loopid = lport->lport_loopid_map + loop_id;
1303 se_nacl = fc_loopid->se_nacl;
1304 if (!se_nacl) {
1305 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1306 loop_id);
1307 return NULL;
1308 }
1309
1310 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1311
1312 if (!nacl->fc_port) {
1313 pr_err("Unable to locate struct fc_port\n");
1314 return NULL;
1315 }
1316
1317 return nacl->fc_port;
1318 }
1319
1320 /*
1321 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1322 */
1323 static void tcm_qla2xxx_set_sess_by_loop_id(
1324 struct tcm_qla2xxx_lport *lport,
1325 struct se_node_acl *new_se_nacl,
1326 struct tcm_qla2xxx_nacl *nacl,
1327 struct se_session *se_sess,
1328 struct fc_port *fc_port,
1329 uint16_t loop_id)
1330 {
1331 struct se_node_acl *saved_nacl;
1332 struct tcm_qla2xxx_fc_loopid *fc_loopid;
1333
1334 pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1335
1336 fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1337 lport->lport_loopid_map)[loop_id];
1338
1339 saved_nacl = fc_loopid->se_nacl;
1340 if (!saved_nacl) {
1341 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1342 fc_loopid->se_nacl = new_se_nacl;
1343 if (fc_port->se_sess != se_sess)
1344 fc_port->se_sess = se_sess;
1345 if (nacl->fc_port != fc_port)
1346 nacl->fc_port = fc_port;
1347 return;
1348 }
1349
1350 if (nacl->fc_port) {
1351 if (new_se_nacl == NULL) {
1352 pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1353 fc_loopid->se_nacl = NULL;
1354 nacl->fc_port = NULL;
1355 return;
1356 }
1357
1358 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1359 fc_loopid->se_nacl = new_se_nacl;
1360 if (fc_port->se_sess != se_sess)
1361 fc_port->se_sess = se_sess;
1362 if (nacl->fc_port != fc_port)
1363 nacl->fc_port = fc_port;
1364 return;
1365 }
1366
1367 if (new_se_nacl == NULL) {
1368 pr_debug("Clearing fc_loopid->se_nacl\n");
1369 fc_loopid->se_nacl = NULL;
1370 return;
1371 }
1372
1373 pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1374 fc_loopid->se_nacl = new_se_nacl;
1375 if (fc_port->se_sess != se_sess)
1376 fc_port->se_sess = se_sess;
1377 if (nacl->fc_port != fc_port)
1378 nacl->fc_port = fc_port;
1379
1380 pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1381 nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1382 }
1383
1384 /*
1385 * Should always be called with qla_hw_data->tgt.sess_lock held.
1386 */
1387 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1388 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1389 {
1390 struct se_session *se_sess = sess->se_sess;
1391 unsigned char be_sid[3];
1392
1393 be_sid[0] = sess->d_id.b.domain;
1394 be_sid[1] = sess->d_id.b.area;
1395 be_sid[2] = sess->d_id.b.al_pa;
1396
1397 tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1398 sess, be_sid);
1399 tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1400 sess, sess->loop_id);
1401 }
1402
1403 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1404 {
1405 struct qla_tgt *tgt = sess->tgt;
1406 struct qla_hw_data *ha = tgt->ha;
1407 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1408 struct se_session *se_sess;
1409 struct tcm_qla2xxx_lport *lport;
1410
1411 BUG_ON(in_interrupt());
1412
1413 se_sess = sess->se_sess;
1414 if (!se_sess) {
1415 pr_err("struct fc_port->se_sess is NULL\n");
1416 dump_stack();
1417 return;
1418 }
1419
1420 lport = vha->vha_tgt.target_lport_ptr;
1421 if (!lport) {
1422 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1423 dump_stack();
1424 return;
1425 }
1426 target_wait_for_sess_cmds(se_sess);
1427
1428 target_remove_session(se_sess);
1429 }
1430
1431 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1432 struct se_session *se_sess, void *p)
1433 {
1434 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1435 struct tcm_qla2xxx_tpg, se_tpg);
1436 struct tcm_qla2xxx_lport *lport = tpg->lport;
1437 struct qla_hw_data *ha = lport->qla_vha->hw;
1438 struct se_node_acl *se_nacl = se_sess->se_node_acl;
1439 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1440 struct tcm_qla2xxx_nacl, se_node_acl);
1441 struct fc_port *qlat_sess = p;
1442 uint16_t loop_id = qlat_sess->loop_id;
1443 unsigned long flags;
1444 unsigned char be_sid[3];
1445
1446 be_sid[0] = qlat_sess->d_id.b.domain;
1447 be_sid[1] = qlat_sess->d_id.b.area;
1448 be_sid[2] = qlat_sess->d_id.b.al_pa;
1449
1450 /*
1451 * And now setup se_nacl and session pointers into HW lport internal
1452 * mappings for fabric S_ID and LOOP_ID.
1453 */
1454 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1455 tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1456 se_sess, qlat_sess, be_sid);
1457 tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1458 se_sess, qlat_sess, loop_id);
1459 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1460
1461 return 0;
1462 }
1463
1464 /*
1465 * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1466 * to locate struct se_node_acl
1467 */
1468 static int tcm_qla2xxx_check_initiator_node_acl(
1469 scsi_qla_host_t *vha,
1470 unsigned char *fc_wwpn,
1471 struct fc_port *qlat_sess)
1472 {
1473 struct qla_hw_data *ha = vha->hw;
1474 struct tcm_qla2xxx_lport *lport;
1475 struct tcm_qla2xxx_tpg *tpg;
1476 struct se_session *se_sess;
1477 unsigned char port_name[36];
1478 int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1479 TCM_QLA2XXX_DEFAULT_TAGS;
1480
1481 lport = vha->vha_tgt.target_lport_ptr;
1482 if (!lport) {
1483 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1484 dump_stack();
1485 return -EINVAL;
1486 }
1487 /*
1488 * Locate the TPG=1 reference..
1489 */
1490 tpg = lport->tpg_1;
1491 if (!tpg) {
1492 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1493 return -EINVAL;
1494 }
1495 /*
1496 * Format the FCP Initiator port_name into colon seperated values to
1497 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1498 */
1499 memset(&port_name, 0, 36);
1500 snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1501 /*
1502 * Locate our struct se_node_acl either from an explict NodeACL created
1503 * via ConfigFS, or via running in TPG demo mode.
1504 */
1505 se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1506 sizeof(struct qla_tgt_cmd),
1507 TARGET_PROT_ALL, port_name,
1508 qlat_sess, tcm_qla2xxx_session_cb);
1509 if (IS_ERR(se_sess))
1510 return PTR_ERR(se_sess);
1511
1512 return 0;
1513 }
1514
1515 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1516 uint16_t loop_id, bool conf_compl_supported)
1517 {
1518 struct qla_tgt *tgt = sess->tgt;
1519 struct qla_hw_data *ha = tgt->ha;
1520 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1521 struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1522 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1523 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1524 struct tcm_qla2xxx_nacl, se_node_acl);
1525 u32 key;
1526
1527
1528 if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1529 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1530 sess, sess->port_name,
1531 sess->loop_id, loop_id, sess->d_id.b.domain,
1532 sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1533 s_id.b.area, s_id.b.al_pa);
1534
1535 if (sess->loop_id != loop_id) {
1536 /*
1537 * Because we can shuffle loop IDs around and we
1538 * update different sessions non-atomically, we might
1539 * have overwritten this session's old loop ID
1540 * already, and we might end up overwriting some other
1541 * session that will be updated later. So we have to
1542 * be extra careful and we can't warn about those things...
1543 */
1544 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1545 lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1546
1547 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1548
1549 sess->loop_id = loop_id;
1550 }
1551
1552 if (sess->d_id.b24 != s_id.b24) {
1553 key = (((u32) sess->d_id.b.domain << 16) |
1554 ((u32) sess->d_id.b.area << 8) |
1555 ((u32) sess->d_id.b.al_pa));
1556
1557 if (btree_lookup32(&lport->lport_fcport_map, key))
1558 WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1559 se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1560 sess->d_id.b.domain, sess->d_id.b.area,
1561 sess->d_id.b.al_pa);
1562 else
1563 WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1564 sess->d_id.b.domain, sess->d_id.b.area,
1565 sess->d_id.b.al_pa);
1566
1567 key = (((u32) s_id.b.domain << 16) |
1568 ((u32) s_id.b.area << 8) |
1569 ((u32) s_id.b.al_pa));
1570
1571 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1572 WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1573 s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1574 btree_update32(&lport->lport_fcport_map, key, se_nacl);
1575 } else {
1576 btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1577 GFP_ATOMIC);
1578 }
1579
1580 sess->d_id = s_id;
1581 nacl->nport_id = key;
1582 }
1583
1584 sess->conf_compl_supported = conf_compl_supported;
1585
1586 }
1587
1588 /*
1589 * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1590 */
1591 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1592 .find_cmd_by_tag = tcm_qla2xxx_find_cmd_by_tag,
1593 .handle_cmd = tcm_qla2xxx_handle_cmd,
1594 .handle_data = tcm_qla2xxx_handle_data,
1595 .handle_tmr = tcm_qla2xxx_handle_tmr,
1596 .free_cmd = tcm_qla2xxx_free_cmd,
1597 .free_mcmd = tcm_qla2xxx_free_mcmd,
1598 .free_session = tcm_qla2xxx_free_session,
1599 .update_sess = tcm_qla2xxx_update_sess,
1600 .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1601 .find_sess_by_s_id = tcm_qla2xxx_find_sess_by_s_id,
1602 .find_sess_by_loop_id = tcm_qla2xxx_find_sess_by_loop_id,
1603 .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1604 .put_sess = tcm_qla2xxx_put_sess,
1605 .shutdown_sess = tcm_qla2xxx_shutdown_sess,
1606 .get_dif_tags = tcm_qla2xxx_dif_tags,
1607 .chk_dif_tags = tcm_qla2xxx_chk_dif_tags,
1608 };
1609
1610 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1611 {
1612 int rc;
1613
1614 rc = btree_init32(&lport->lport_fcport_map);
1615 if (rc) {
1616 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1617 return rc;
1618 }
1619
1620 lport->lport_loopid_map =
1621 vzalloc(array_size(65536,
1622 sizeof(struct tcm_qla2xxx_fc_loopid)));
1623 if (!lport->lport_loopid_map) {
1624 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1625 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1626 btree_destroy32(&lport->lport_fcport_map);
1627 return -ENOMEM;
1628 }
1629 pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1630 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1631 return 0;
1632 }
1633
1634 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1635 void *target_lport_ptr,
1636 u64 npiv_wwpn, u64 npiv_wwnn)
1637 {
1638 struct qla_hw_data *ha = vha->hw;
1639 struct tcm_qla2xxx_lport *lport =
1640 (struct tcm_qla2xxx_lport *)target_lport_ptr;
1641 /*
1642 * Setup tgt_ops, local pointer to vha and target_lport_ptr
1643 */
1644 ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1645 vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1646 lport->qla_vha = vha;
1647
1648 return 0;
1649 }
1650
1651 static struct se_wwn *tcm_qla2xxx_make_lport(
1652 struct target_fabric_configfs *tf,
1653 struct config_group *group,
1654 const char *name)
1655 {
1656 struct tcm_qla2xxx_lport *lport;
1657 u64 wwpn;
1658 int ret = -ENODEV;
1659
1660 if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1661 return ERR_PTR(-EINVAL);
1662
1663 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1664 if (!lport) {
1665 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1666 return ERR_PTR(-ENOMEM);
1667 }
1668 lport->lport_wwpn = wwpn;
1669 tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1670 wwpn);
1671 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1672
1673 ret = tcm_qla2xxx_init_lport(lport);
1674 if (ret != 0)
1675 goto out;
1676
1677 ret = qlt_lport_register(lport, wwpn, 0, 0,
1678 tcm_qla2xxx_lport_register_cb);
1679 if (ret != 0)
1680 goto out_lport;
1681
1682 return &lport->lport_wwn;
1683 out_lport:
1684 vfree(lport->lport_loopid_map);
1685 btree_destroy32(&lport->lport_fcport_map);
1686 out:
1687 kfree(lport);
1688 return ERR_PTR(ret);
1689 }
1690
1691 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1692 {
1693 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1694 struct tcm_qla2xxx_lport, lport_wwn);
1695 struct scsi_qla_host *vha = lport->qla_vha;
1696 struct se_node_acl *node;
1697 u32 key = 0;
1698
1699 /*
1700 * Call into qla2x_target.c LLD logic to complete the
1701 * shutdown of struct qla_tgt after the call to
1702 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1703 */
1704 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1705 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1706
1707 qlt_lport_deregister(vha);
1708
1709 vfree(lport->lport_loopid_map);
1710 btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1711 btree_remove32(&lport->lport_fcport_map, key);
1712 btree_destroy32(&lport->lport_fcport_map);
1713 kfree(lport);
1714 }
1715
1716 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1717 void *target_lport_ptr,
1718 u64 npiv_wwpn, u64 npiv_wwnn)
1719 {
1720 struct fc_vport *vport;
1721 struct Scsi_Host *sh = base_vha->host;
1722 struct scsi_qla_host *npiv_vha;
1723 struct tcm_qla2xxx_lport *lport =
1724 (struct tcm_qla2xxx_lport *)target_lport_ptr;
1725 struct tcm_qla2xxx_lport *base_lport =
1726 (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1727 struct fc_vport_identifiers vport_id;
1728
1729 if (qla_ini_mode_enabled(base_vha)) {
1730 pr_err("qla2xxx base_vha not enabled for target mode\n");
1731 return -EPERM;
1732 }
1733
1734 if (!base_lport || !base_lport->tpg_1 ||
1735 !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1736 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1737 return -EPERM;
1738 }
1739
1740 memset(&vport_id, 0, sizeof(vport_id));
1741 vport_id.port_name = npiv_wwpn;
1742 vport_id.node_name = npiv_wwnn;
1743 vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1744 vport_id.vport_type = FC_PORTTYPE_NPIV;
1745 vport_id.disable = false;
1746
1747 vport = fc_vport_create(sh, 0, &vport_id);
1748 if (!vport) {
1749 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1750 return -ENODEV;
1751 }
1752 /*
1753 * Setup local pointer to NPIV vhba + target_lport_ptr
1754 */
1755 npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1756 npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1757 lport->qla_vha = npiv_vha;
1758 scsi_host_get(npiv_vha->host);
1759 return 0;
1760 }
1761
1762
1763 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1764 struct target_fabric_configfs *tf,
1765 struct config_group *group,
1766 const char *name)
1767 {
1768 struct tcm_qla2xxx_lport *lport;
1769 u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1770 char *p, tmp[128];
1771 int ret;
1772
1773 snprintf(tmp, 128, "%s", name);
1774
1775 p = strchr(tmp, '@');
1776 if (!p) {
1777 pr_err("Unable to locate NPIV '@' separator\n");
1778 return ERR_PTR(-EINVAL);
1779 }
1780 *p++ = '\0';
1781
1782 if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1783 return ERR_PTR(-EINVAL);
1784
1785 if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1786 &npiv_wwpn, &npiv_wwnn) < 0)
1787 return ERR_PTR(-EINVAL);
1788
1789 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1790 if (!lport) {
1791 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1792 return ERR_PTR(-ENOMEM);
1793 }
1794 lport->lport_npiv_wwpn = npiv_wwpn;
1795 lport->lport_npiv_wwnn = npiv_wwnn;
1796 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1797
1798 ret = tcm_qla2xxx_init_lport(lport);
1799 if (ret != 0)
1800 goto out;
1801
1802 ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1803 tcm_qla2xxx_lport_register_npiv_cb);
1804 if (ret != 0)
1805 goto out_lport;
1806
1807 return &lport->lport_wwn;
1808 out_lport:
1809 vfree(lport->lport_loopid_map);
1810 btree_destroy32(&lport->lport_fcport_map);
1811 out:
1812 kfree(lport);
1813 return ERR_PTR(ret);
1814 }
1815
1816 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1817 {
1818 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1819 struct tcm_qla2xxx_lport, lport_wwn);
1820 struct scsi_qla_host *npiv_vha = lport->qla_vha;
1821 struct qla_hw_data *ha = npiv_vha->hw;
1822 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1823
1824 scsi_host_put(npiv_vha->host);
1825 /*
1826 * Notify libfc that we want to release the vha->fc_vport
1827 */
1828 fc_vport_terminate(npiv_vha->fc_vport);
1829 scsi_host_put(base_vha->host);
1830 kfree(lport);
1831 }
1832
1833
1834 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1835 char *page)
1836 {
1837 return sprintf(page,
1838 "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1839 QLA2XXX_VERSION, utsname()->sysname,
1840 utsname()->machine, utsname()->release);
1841 }
1842
1843 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1844
1845 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1846 &tcm_qla2xxx_wwn_attr_version,
1847 NULL,
1848 };
1849
1850 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1851 .module = THIS_MODULE,
1852 .fabric_name = "qla2xxx",
1853 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl),
1854 /*
1855 * XXX: Limit assumes single page per scatter-gather-list entry.
1856 * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1857 */
1858 .max_data_sg_nents = 1200,
1859 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
1860 .tpg_get_tag = tcm_qla2xxx_get_tag,
1861 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode,
1862 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache,
1863 .tpg_check_demo_mode_write_protect =
1864 tcm_qla2xxx_check_demo_write_protect,
1865 .tpg_check_prod_mode_write_protect =
1866 tcm_qla2xxx_check_prod_write_protect,
1867 .tpg_check_prot_fabric_only = tcm_qla2xxx_check_prot_fabric_only,
1868 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1869 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
1870 .check_stop_free = tcm_qla2xxx_check_stop_free,
1871 .release_cmd = tcm_qla2xxx_release_cmd,
1872 .close_session = tcm_qla2xxx_close_session,
1873 .sess_get_index = tcm_qla2xxx_sess_get_index,
1874 .sess_get_initiator_sid = NULL,
1875 .write_pending = tcm_qla2xxx_write_pending,
1876 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
1877 .get_cmd_state = tcm_qla2xxx_get_cmd_state,
1878 .queue_data_in = tcm_qla2xxx_queue_data_in,
1879 .queue_status = tcm_qla2xxx_queue_status,
1880 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
1881 .aborted_task = tcm_qla2xxx_aborted_task,
1882 /*
1883 * Setup function pointers for generic logic in
1884 * target_core_fabric_configfs.c
1885 */
1886 .fabric_make_wwn = tcm_qla2xxx_make_lport,
1887 .fabric_drop_wwn = tcm_qla2xxx_drop_lport,
1888 .fabric_make_tpg = tcm_qla2xxx_make_tpg,
1889 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
1890 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl,
1891
1892 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
1893 .tfc_tpg_base_attrs = tcm_qla2xxx_tpg_attrs,
1894 .tfc_tpg_attrib_attrs = tcm_qla2xxx_tpg_attrib_attrs,
1895 };
1896
1897 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1898 .module = THIS_MODULE,
1899 .fabric_name = "qla2xxx_npiv",
1900 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl),
1901 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
1902 .tpg_get_tag = tcm_qla2xxx_get_tag,
1903 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode,
1904 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache,
1905 .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1906 .tpg_check_prod_mode_write_protect =
1907 tcm_qla2xxx_check_prod_write_protect,
1908 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1909 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
1910 .check_stop_free = tcm_qla2xxx_check_stop_free,
1911 .release_cmd = tcm_qla2xxx_release_cmd,
1912 .close_session = tcm_qla2xxx_close_session,
1913 .sess_get_index = tcm_qla2xxx_sess_get_index,
1914 .sess_get_initiator_sid = NULL,
1915 .write_pending = tcm_qla2xxx_write_pending,
1916 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
1917 .get_cmd_state = tcm_qla2xxx_get_cmd_state,
1918 .queue_data_in = tcm_qla2xxx_queue_data_in,
1919 .queue_status = tcm_qla2xxx_queue_status,
1920 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
1921 .aborted_task = tcm_qla2xxx_aborted_task,
1922 /*
1923 * Setup function pointers for generic logic in
1924 * target_core_fabric_configfs.c
1925 */
1926 .fabric_make_wwn = tcm_qla2xxx_npiv_make_lport,
1927 .fabric_drop_wwn = tcm_qla2xxx_npiv_drop_lport,
1928 .fabric_make_tpg = tcm_qla2xxx_npiv_make_tpg,
1929 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
1930 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl,
1931
1932 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
1933 .tfc_tpg_base_attrs = tcm_qla2xxx_npiv_tpg_attrs,
1934 };
1935
1936 static int tcm_qla2xxx_register_configfs(void)
1937 {
1938 int ret;
1939
1940 pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1941 QLA2XXX_VERSION, utsname()->sysname,
1942 utsname()->machine, utsname()->release);
1943
1944 ret = target_register_template(&tcm_qla2xxx_ops);
1945 if (ret)
1946 return ret;
1947
1948 ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1949 if (ret)
1950 goto out_fabric;
1951
1952 tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1953 WQ_MEM_RECLAIM, 0);
1954 if (!tcm_qla2xxx_free_wq) {
1955 ret = -ENOMEM;
1956 goto out_fabric_npiv;
1957 }
1958
1959 return 0;
1960
1961 out_fabric_npiv:
1962 target_unregister_template(&tcm_qla2xxx_npiv_ops);
1963 out_fabric:
1964 target_unregister_template(&tcm_qla2xxx_ops);
1965 return ret;
1966 }
1967
1968 static void tcm_qla2xxx_deregister_configfs(void)
1969 {
1970 destroy_workqueue(tcm_qla2xxx_free_wq);
1971
1972 target_unregister_template(&tcm_qla2xxx_ops);
1973 target_unregister_template(&tcm_qla2xxx_npiv_ops);
1974 }
1975
1976 static int __init tcm_qla2xxx_init(void)
1977 {
1978 int ret;
1979
1980 ret = tcm_qla2xxx_register_configfs();
1981 if (ret < 0)
1982 return ret;
1983
1984 return 0;
1985 }
1986
1987 static void __exit tcm_qla2xxx_exit(void)
1988 {
1989 tcm_qla2xxx_deregister_configfs();
1990 }
1991
1992 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1993 MODULE_LICENSE("GPL");
1994 module_init(tcm_qla2xxx_init);
1995 module_exit(tcm_qla2xxx_exit);
Linux with added FPC-III support