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tcp: fix lockdep splat in tcp_snd_una_update()
[linux/fpc-iii.git] / drivers / scsi / qla2xxx / tcm_qla2xxx.c
blobc1461d225f08b4667572181687fc4dbea9c7b89b
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 <generated/utsrelease.h>
29 #include <linux/utsname.h>
30 #include <linux/vmalloc.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
33 #include <linux/slab.h>
34 #include <linux/kthread.h>
35 #include <linux/types.h>
36 #include <linux/string.h>
37 #include <linux/configfs.h>
38 #include <linux/ctype.h>
39 #include <asm/unaligned.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <target/target_core_base.h>
45 #include <target/target_core_fabric.h>
46
47 #include "qla_def.h"
48 #include "qla_target.h"
49 #include "tcm_qla2xxx.h"
50
51 static struct workqueue_struct *tcm_qla2xxx_free_wq;
52 static struct workqueue_struct *tcm_qla2xxx_cmd_wq;
53
54 /*
55 * Parse WWN.
56 * If strict, we require lower-case hex and colon separators to be sure
57 * the name is the same as what would be generated by ft_format_wwn()
58 * so the name and wwn are mapped one-to-one.
59 */
60 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
61 {
62 const char *cp;
63 char c;
64 u32 nibble;
65 u32 byte = 0;
66 u32 pos = 0;
67 u32 err;
68
69 *wwn = 0;
70 for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
71 c = *cp;
72 if (c == '\n' && cp[1] == '\0')
73 continue;
74 if (strict && pos++ == 2 && byte++ < 7) {
75 pos = 0;
76 if (c == ':')
77 continue;
78 err = 1;
79 goto fail;
80 }
81 if (c == '\0') {
82 err = 2;
83 if (strict && byte != 8)
84 goto fail;
85 return cp - name;
86 }
87 err = 3;
88 if (isdigit(c))
89 nibble = c - '0';
90 else if (isxdigit(c) && (islower(c) || !strict))
91 nibble = tolower(c) - 'a' + 10;
92 else
93 goto fail;
94 *wwn = (*wwn << 4) | nibble;
95 }
96 err = 4;
97 fail:
98 pr_debug("err %u len %zu pos %u byte %u\n",
99 err, cp - name, pos, byte);
100 return -1;
101 }
102
103 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
104 {
105 u8 b[8];
106
107 put_unaligned_be64(wwn, b);
108 return snprintf(buf, len,
109 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
110 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
111 }
112
113 static char *tcm_qla2xxx_get_fabric_name(void)
114 {
115 return "qla2xxx";
116 }
117
118 /*
119 * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
120 */
121 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
122 {
123 unsigned int i, j;
124 u8 wwn[8];
125
126 memset(wwn, 0, sizeof(wwn));
127
128 /* Validate and store the new name */
129 for (i = 0, j = 0; i < 16; i++) {
130 int value;
131
132 value = hex_to_bin(*ns++);
133 if (value >= 0)
134 j = (j << 4) | value;
135 else
136 return -EINVAL;
137
138 if (i % 2) {
139 wwn[i/2] = j & 0xff;
140 j = 0;
141 }
142 }
143
144 *nm = wwn_to_u64(wwn);
145 return 0;
146 }
147
148 /*
149 * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
150 * store_fc_host_vport_create()
151 */
152 static int tcm_qla2xxx_npiv_parse_wwn(
153 const char *name,
154 size_t count,
155 u64 *wwpn,
156 u64 *wwnn)
157 {
158 unsigned int cnt = count;
159 int rc;
160
161 *wwpn = 0;
162 *wwnn = 0;
163
164 /* count may include a LF at end of string */
165 if (name[cnt-1] == '\n' || name[cnt-1] == 0)
166 cnt--;
167
168 /* validate we have enough characters for WWPN */
169 if ((cnt != (16+1+16)) || (name[16] != ':'))
170 return -EINVAL;
171
172 rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
173 if (rc != 0)
174 return rc;
175
176 rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
177 if (rc != 0)
178 return rc;
179
180 return 0;
181 }
182
183 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
184 {
185 return "qla2xxx_npiv";
186 }
187
188 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
189 {
190 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
191 struct tcm_qla2xxx_tpg, se_tpg);
192 struct tcm_qla2xxx_lport *lport = tpg->lport;
193
194 return lport->lport_naa_name;
195 }
196
197 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
198 {
199 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
200 struct tcm_qla2xxx_tpg, se_tpg);
201 return tpg->lport_tpgt;
202 }
203
204 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
205 {
206 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
207 struct tcm_qla2xxx_tpg, se_tpg);
208
209 return tpg->tpg_attrib.generate_node_acls;
210 }
211
212 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
213 {
214 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
215 struct tcm_qla2xxx_tpg, se_tpg);
216
217 return tpg->tpg_attrib.cache_dynamic_acls;
218 }
219
220 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
221 {
222 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
223 struct tcm_qla2xxx_tpg, se_tpg);
224
225 return tpg->tpg_attrib.demo_mode_write_protect;
226 }
227
228 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
229 {
230 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
231 struct tcm_qla2xxx_tpg, se_tpg);
232
233 return tpg->tpg_attrib.prod_mode_write_protect;
234 }
235
236 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
237 {
238 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
239 struct tcm_qla2xxx_tpg, se_tpg);
240
241 return tpg->tpg_attrib.demo_mode_login_only;
242 }
243
244 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
245 {
246 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
247 struct tcm_qla2xxx_tpg, se_tpg);
248
249 return tpg->tpg_attrib.fabric_prot_type;
250 }
251
252 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
253 {
254 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
255 struct tcm_qla2xxx_tpg, se_tpg);
256
257 return tpg->lport_tpgt;
258 }
259
260 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
261 {
262 struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
263 struct qla_tgt_mgmt_cmd, free_work);
264
265 transport_generic_free_cmd(&mcmd->se_cmd, 0);
266 }
267
268 /*
269 * Called from qla_target_template->free_mcmd(), and will call
270 * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
271 * release callback. qla_hw_data->hardware_lock is expected to be held
272 */
273 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
274 {
275 INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
276 queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
277 }
278
279 static void tcm_qla2xxx_complete_free(struct work_struct *work)
280 {
281 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
282
283 cmd->cmd_in_wq = 0;
284
285 WARN_ON(cmd->cmd_flags & BIT_16);
286
287 cmd->vha->tgt_counters.qla_core_ret_sta_ctio++;
288 cmd->cmd_flags |= BIT_16;
289 transport_generic_free_cmd(&cmd->se_cmd, 0);
290 }
291
292 /*
293 * Called from qla_target_template->free_cmd(), and will call
294 * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
295 * release callback. qla_hw_data->hardware_lock is expected to be held
296 */
297 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
298 {
299 cmd->vha->tgt_counters.core_qla_free_cmd++;
300 cmd->cmd_in_wq = 1;
301
302 BUG_ON(cmd->cmd_flags & BIT_20);
303 cmd->cmd_flags |= BIT_20;
304
305 INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
306 queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
307 }
308
309 /*
310 * Called from struct target_core_fabric_ops->check_stop_free() context
311 */
312 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
313 {
314 struct qla_tgt_cmd *cmd;
315
316 if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
317 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
318 cmd->cmd_flags |= BIT_14;
319 }
320
321 return target_put_sess_cmd(se_cmd);
322 }
323
324 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
325 * fabric descriptor @se_cmd command to release
326 */
327 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
328 {
329 struct qla_tgt_cmd *cmd;
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
338 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
339 qlt_free_cmd(cmd);
340 }
341
342 static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
343 {
344 struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
345 struct scsi_qla_host *vha;
346 unsigned long flags;
347
348 BUG_ON(!sess);
349 vha = sess->vha;
350
351 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
352 target_sess_cmd_list_set_waiting(se_sess);
353 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
354
355 return 1;
356 }
357
358 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
359 {
360 struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
361 struct scsi_qla_host *vha;
362 unsigned long flags;
363
364 BUG_ON(!sess);
365 vha = sess->vha;
366
367 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
368 qlt_unreg_sess(sess);
369 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
370 }
371
372 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
373 {
374 return 0;
375 }
376
377 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
378 {
379 struct qla_tgt_cmd *cmd = container_of(se_cmd,
380 struct qla_tgt_cmd, se_cmd);
381
382 if (cmd->aborted) {
383 /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
384 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
385 * already kick start the free.
386 */
387 pr_debug("write_pending aborted cmd[%p] refcount %d "
388 "transport_state %x, t_state %x, se_cmd_flags %x\n",
389 cmd,cmd->se_cmd.cmd_kref.refcount.counter,
390 cmd->se_cmd.transport_state,
391 cmd->se_cmd.t_state,
392 cmd->se_cmd.se_cmd_flags);
393 return 0;
394 }
395 cmd->cmd_flags |= BIT_3;
396 cmd->bufflen = se_cmd->data_length;
397 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
398
399 cmd->sg_cnt = se_cmd->t_data_nents;
400 cmd->sg = se_cmd->t_data_sg;
401
402 cmd->prot_sg_cnt = se_cmd->t_prot_nents;
403 cmd->prot_sg = se_cmd->t_prot_sg;
404 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size;
405 se_cmd->pi_err = 0;
406
407 /*
408 * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
409 * the SGL mappings into PCIe memory for incoming FCP WRITE data.
410 */
411 return qlt_rdy_to_xfer(cmd);
412 }
413
414 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
415 {
416 unsigned long flags;
417 /*
418 * Check for WRITE_PENDING status to determine if we need to wait for
419 * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
420 */
421 spin_lock_irqsave(&se_cmd->t_state_lock, flags);
422 if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
423 se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
424 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
425 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
426 50);
427 return 0;
428 }
429 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
430
431 return 0;
432 }
433
434 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
435 {
436 return;
437 }
438
439 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
440 {
441 if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
442 struct qla_tgt_cmd *cmd = container_of(se_cmd,
443 struct qla_tgt_cmd, se_cmd);
444 return cmd->state;
445 }
446
447 return 0;
448 }
449
450 /*
451 * Called from process context in qla_target.c:qlt_do_work() code
452 */
453 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
454 unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
455 int data_dir, int bidi)
456 {
457 struct se_cmd *se_cmd = &cmd->se_cmd;
458 struct se_session *se_sess;
459 struct qla_tgt_sess *sess;
460 int flags = TARGET_SCF_ACK_KREF;
461
462 if (bidi)
463 flags |= TARGET_SCF_BIDI_OP;
464
465 if (se_cmd->cpuid != WORK_CPU_UNBOUND)
466 flags |= TARGET_SCF_USE_CPUID;
467
468 sess = cmd->sess;
469 if (!sess) {
470 pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
471 return -EINVAL;
472 }
473
474 se_sess = sess->se_sess;
475 if (!se_sess) {
476 pr_err("Unable to locate active struct se_session\n");
477 return -EINVAL;
478 }
479
480 cmd->vha->tgt_counters.qla_core_sbt_cmd++;
481 return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
482 cmd->unpacked_lun, data_length, fcp_task_attr,
483 data_dir, flags);
484 }
485
486 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
487 {
488 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
489 unsigned long flags;
490
491 /*
492 * Ensure that the complete FCP WRITE payload has been received.
493 * Otherwise return an exception via CHECK_CONDITION status.
494 */
495 cmd->cmd_in_wq = 0;
496
497 spin_lock_irqsave(&cmd->cmd_lock, flags);
498 cmd->cmd_flags |= CMD_FLAG_DATA_WORK;
499 if (cmd->aborted) {
500 cmd->cmd_flags |= CMD_FLAG_DATA_WORK_FREE;
501 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
502
503 tcm_qla2xxx_free_cmd(cmd);
504 return;
505 }
506 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
507
508 cmd->vha->tgt_counters.qla_core_ret_ctio++;
509 if (!cmd->write_data_transferred) {
510 /*
511 * Check if se_cmd has already been aborted via LUN_RESET, and
512 * waiting upon completion in tcm_qla2xxx_write_pending_status()
513 */
514 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
515 complete(&cmd->se_cmd.t_transport_stop_comp);
516 return;
517 }
518
519 if (cmd->se_cmd.pi_err)
520 transport_generic_request_failure(&cmd->se_cmd,
521 cmd->se_cmd.pi_err);
522 else
523 transport_generic_request_failure(&cmd->se_cmd,
524 TCM_CHECK_CONDITION_ABORT_CMD);
525
526 return;
527 }
528
529 return target_execute_cmd(&cmd->se_cmd);
530 }
531
532 /*
533 * Called from qla_target.c:qlt_do_ctio_completion()
534 */
535 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
536 {
537 cmd->cmd_flags |= BIT_10;
538 cmd->cmd_in_wq = 1;
539 INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
540 queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
541 }
542
543 static void tcm_qla2xxx_handle_dif_work(struct work_struct *work)
544 {
545 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
546
547 /* take an extra kref to prevent cmd free too early.
548 * need to wait for SCSI status/check condition to
549 * finish responding generate by transport_generic_request_failure.
550 */
551 kref_get(&cmd->se_cmd.cmd_kref);
552 transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err);
553 }
554
555 /*
556 * Called from qla_target.c:qlt_do_ctio_completion()
557 */
558 static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd)
559 {
560 INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work);
561 queue_work(tcm_qla2xxx_free_wq, &cmd->work);
562 }
563
564 /*
565 * Called from qla_target.c:qlt_issue_task_mgmt()
566 */
567 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
568 uint8_t tmr_func, uint32_t tag)
569 {
570 struct qla_tgt_sess *sess = mcmd->sess;
571 struct se_cmd *se_cmd = &mcmd->se_cmd;
572
573 return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
574 tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
575 }
576
577 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
578 {
579 struct qla_tgt_cmd *cmd = container_of(se_cmd,
580 struct qla_tgt_cmd, se_cmd);
581
582 if (cmd->aborted) {
583 /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
584 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
585 * already kick start the free.
586 */
587 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
588 "transport_state %x, t_state %x, se_cmd_flags %x\n",
589 cmd,cmd->se_cmd.cmd_kref.refcount.counter,
590 cmd->se_cmd.transport_state,
591 cmd->se_cmd.t_state,
592 cmd->se_cmd.se_cmd_flags);
593 return 0;
594 }
595
596 cmd->cmd_flags |= BIT_4;
597 cmd->bufflen = se_cmd->data_length;
598 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
599
600 cmd->sg_cnt = se_cmd->t_data_nents;
601 cmd->sg = se_cmd->t_data_sg;
602 cmd->offset = 0;
603
604 cmd->prot_sg_cnt = se_cmd->t_prot_nents;
605 cmd->prot_sg = se_cmd->t_prot_sg;
606 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size;
607 se_cmd->pi_err = 0;
608
609 /*
610 * Now queue completed DATA_IN the qla2xxx LLD and response ring
611 */
612 return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
613 se_cmd->scsi_status);
614 }
615
616 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
617 {
618 struct qla_tgt_cmd *cmd = container_of(se_cmd,
619 struct qla_tgt_cmd, se_cmd);
620 int xmit_type = QLA_TGT_XMIT_STATUS;
621
622 cmd->bufflen = se_cmd->data_length;
623 cmd->sg = NULL;
624 cmd->sg_cnt = 0;
625 cmd->offset = 0;
626 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
627 if (cmd->cmd_flags & BIT_5) {
628 pr_crit("Bit_5 already set for cmd = %p.\n", cmd);
629 dump_stack();
630 }
631 cmd->cmd_flags |= BIT_5;
632
633 if (se_cmd->data_direction == DMA_FROM_DEVICE) {
634 /*
635 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
636 * for qla_tgt_xmit_response LLD code
637 */
638 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
639 se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
640 se_cmd->residual_count = 0;
641 }
642 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
643 se_cmd->residual_count += se_cmd->data_length;
644
645 cmd->bufflen = 0;
646 }
647 /*
648 * Now queue status response to qla2xxx LLD code and response ring
649 */
650 return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
651 }
652
653 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
654 {
655 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
656 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
657 struct qla_tgt_mgmt_cmd, se_cmd);
658
659 pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
660 mcmd, se_tmr->function, se_tmr->response);
661 /*
662 * Do translation between TCM TM response codes and
663 * QLA2xxx FC TM response codes.
664 */
665 switch (se_tmr->response) {
666 case TMR_FUNCTION_COMPLETE:
667 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
668 break;
669 case TMR_TASK_DOES_NOT_EXIST:
670 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
671 break;
672 case TMR_FUNCTION_REJECTED:
673 mcmd->fc_tm_rsp = FC_TM_REJECT;
674 break;
675 case TMR_LUN_DOES_NOT_EXIST:
676 default:
677 mcmd->fc_tm_rsp = FC_TM_FAILED;
678 break;
679 }
680 /*
681 * Queue the TM response to QLA2xxx LLD to build a
682 * CTIO response packet.
683 */
684 qlt_xmit_tm_rsp(mcmd);
685 }
686
687
688 #define DATA_WORK_NOT_FREE(_flags) \
689 (( _flags & (CMD_FLAG_DATA_WORK|CMD_FLAG_DATA_WORK_FREE)) == \
690 CMD_FLAG_DATA_WORK)
691 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
692 {
693 struct qla_tgt_cmd *cmd = container_of(se_cmd,
694 struct qla_tgt_cmd, se_cmd);
695 unsigned long flags;
696
697 if (qlt_abort_cmd(cmd))
698 return;
699
700 spin_lock_irqsave(&cmd->cmd_lock, flags);
701 if ((cmd->state == QLA_TGT_STATE_NEW)||
702 ((cmd->state == QLA_TGT_STATE_DATA_IN) &&
703 DATA_WORK_NOT_FREE(cmd->cmd_flags)) ) {
704
705 cmd->cmd_flags |= CMD_FLAG_DATA_WORK_FREE;
706 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
707 /* Cmd have not reached firmware.
708 * Use this trigger to free it. */
709 tcm_qla2xxx_free_cmd(cmd);
710 return;
711 }
712 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
713 return;
714
715 }
716
717 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
718 struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
719 /*
720 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
721 */
722 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
723 {
724 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
725 struct se_portal_group *se_tpg = se_nacl->se_tpg;
726 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
727 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
728 struct tcm_qla2xxx_lport, lport_wwn);
729 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
730 struct tcm_qla2xxx_nacl, se_node_acl);
731 void *node;
732
733 pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
734
735 node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
736 if (WARN_ON(node && (node != se_nacl))) {
737 /*
738 * The nacl no longer matches what we think it should be.
739 * Most likely a new dynamic acl has been added while
740 * someone dropped the hardware lock. It clearly is a
741 * bug elsewhere, but this bit can't make things worse.
742 */
743 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
744 node, GFP_ATOMIC);
745 }
746
747 pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
748 se_nacl, nacl->nport_wwnn, nacl->nport_id);
749 /*
750 * Now clear the se_nacl and session pointers from our HW lport lookup
751 * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
752 *
753 * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
754 * target_wait_for_sess_cmds() before the session waits for outstanding
755 * I/O to complete, to avoid a race between session shutdown execution
756 * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
757 */
758 tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
759 }
760
761 static void tcm_qla2xxx_release_session(struct kref *kref)
762 {
763 struct se_session *se_sess = container_of(kref,
764 struct se_session, sess_kref);
765
766 qlt_unreg_sess(se_sess->fabric_sess_ptr);
767 }
768
769 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
770 {
771 if (!sess)
772 return;
773
774 assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
775 kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session);
776 }
777
778 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
779 {
780 assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
781 target_sess_cmd_list_set_waiting(sess->se_sess);
782 }
783
784 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
785 const char *name)
786 {
787 struct tcm_qla2xxx_nacl *nacl =
788 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
789 u64 wwnn;
790
791 if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
792 return -EINVAL;
793
794 nacl->nport_wwnn = wwnn;
795 tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
796
797 return 0;
798 }
799
800 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
801
802 #define DEF_QLA_TPG_ATTRIB(name) \
803 \
804 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show( \
805 struct config_item *item, char *page) \
806 { \
807 struct se_portal_group *se_tpg = attrib_to_tpg(item); \
808 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
809 struct tcm_qla2xxx_tpg, se_tpg); \
810 \
811 return sprintf(page, "%u\n", tpg->tpg_attrib.name); \
812 } \
813 \
814 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store( \
815 struct config_item *item, const char *page, size_t count) \
816 { \
817 struct se_portal_group *se_tpg = attrib_to_tpg(item); \
818 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
819 struct tcm_qla2xxx_tpg, se_tpg); \
820 struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib; \
821 unsigned long val; \
822 int ret; \
823 \
824 ret = kstrtoul(page, 0, &val); \
825 if (ret < 0) { \
826 pr_err("kstrtoul() failed with" \
827 " ret: %d\n", ret); \
828 return -EINVAL; \
829 } \
830 \
831 if ((val != 0) && (val != 1)) { \
832 pr_err("Illegal boolean value %lu\n", val); \
833 return -EINVAL; \
834 } \
835 \
836 a->name = val; \
837 \
838 return count; \
839 } \
840 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
841
842 DEF_QLA_TPG_ATTRIB(generate_node_acls);
843 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
844 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
845 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
846 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
847
848 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
849 &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
850 &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
851 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
852 &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
853 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
854 NULL,
855 };
856
857 /* End items for tcm_qla2xxx_tpg_attrib_cit */
858
859 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
860 char *page)
861 {
862 struct se_portal_group *se_tpg = to_tpg(item);
863 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
864 struct tcm_qla2xxx_tpg, se_tpg);
865
866 return snprintf(page, PAGE_SIZE, "%d\n",
867 atomic_read(&tpg->lport_tpg_enabled));
868 }
869
870 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
871 {
872 struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
873 struct tcm_qla2xxx_tpg, tpg_base_work);
874 struct se_portal_group *se_tpg = &base_tpg->se_tpg;
875 struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
876
877 if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
878 atomic_set(&base_tpg->lport_tpg_enabled, 1);
879 qlt_enable_vha(base_vha);
880 }
881 complete(&base_tpg->tpg_base_comp);
882 }
883
884 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
885 {
886 struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
887 struct tcm_qla2xxx_tpg, tpg_base_work);
888 struct se_portal_group *se_tpg = &base_tpg->se_tpg;
889 struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
890
891 if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
892 atomic_set(&base_tpg->lport_tpg_enabled, 0);
893 target_undepend_item(&se_tpg->tpg_group.cg_item);
894 }
895 complete(&base_tpg->tpg_base_comp);
896 }
897
898 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
899 const char *page, size_t count)
900 {
901 struct se_portal_group *se_tpg = to_tpg(item);
902 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
903 struct tcm_qla2xxx_tpg, se_tpg);
904 unsigned long op;
905 int rc;
906
907 rc = kstrtoul(page, 0, &op);
908 if (rc < 0) {
909 pr_err("kstrtoul() returned %d\n", rc);
910 return -EINVAL;
911 }
912 if ((op != 1) && (op != 0)) {
913 pr_err("Illegal value for tpg_enable: %lu\n", op);
914 return -EINVAL;
915 }
916 if (op) {
917 if (atomic_read(&tpg->lport_tpg_enabled))
918 return -EEXIST;
919
920 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
921 } else {
922 if (!atomic_read(&tpg->lport_tpg_enabled))
923 return count;
924
925 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
926 }
927 init_completion(&tpg->tpg_base_comp);
928 schedule_work(&tpg->tpg_base_work);
929 wait_for_completion(&tpg->tpg_base_comp);
930
931 if (op) {
932 if (!atomic_read(&tpg->lport_tpg_enabled))
933 return -ENODEV;
934 } else {
935 if (atomic_read(&tpg->lport_tpg_enabled))
936 return -EPERM;
937 }
938 return count;
939 }
940
941 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
942 char *page)
943 {
944 return target_show_dynamic_sessions(to_tpg(item), page);
945 }
946
947 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
948 const char *page, size_t count)
949 {
950 struct se_portal_group *se_tpg = to_tpg(item);
951 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
952 struct tcm_qla2xxx_tpg, se_tpg);
953 unsigned long val;
954 int ret = kstrtoul(page, 0, &val);
955
956 if (ret) {
957 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
958 return ret;
959 }
960 if (val != 0 && val != 1 && val != 3) {
961 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
962 return -EINVAL;
963 }
964 tpg->tpg_attrib.fabric_prot_type = val;
965
966 return count;
967 }
968
969 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
970 char *page)
971 {
972 struct se_portal_group *se_tpg = to_tpg(item);
973 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
974 struct tcm_qla2xxx_tpg, se_tpg);
975
976 return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
977 }
978
979 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
980 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
981 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
982
983 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
984 &tcm_qla2xxx_tpg_attr_enable,
985 &tcm_qla2xxx_tpg_attr_dynamic_sessions,
986 &tcm_qla2xxx_tpg_attr_fabric_prot_type,
987 NULL,
988 };
989
990 static struct se_portal_group *tcm_qla2xxx_make_tpg(
991 struct se_wwn *wwn,
992 struct config_group *group,
993 const char *name)
994 {
995 struct tcm_qla2xxx_lport *lport = container_of(wwn,
996 struct tcm_qla2xxx_lport, lport_wwn);
997 struct tcm_qla2xxx_tpg *tpg;
998 unsigned long tpgt;
999 int ret;
1000
1001 if (strstr(name, "tpgt_") != name)
1002 return ERR_PTR(-EINVAL);
1003 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1004 return ERR_PTR(-EINVAL);
1005
1006 if ((tpgt != 1)) {
1007 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1008 return ERR_PTR(-ENOSYS);
1009 }
1010
1011 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1012 if (!tpg) {
1013 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1014 return ERR_PTR(-ENOMEM);
1015 }
1016 tpg->lport = lport;
1017 tpg->lport_tpgt = tpgt;
1018 /*
1019 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1020 * NodeACLs
1021 */
1022 tpg->tpg_attrib.generate_node_acls = 1;
1023 tpg->tpg_attrib.demo_mode_write_protect = 1;
1024 tpg->tpg_attrib.cache_dynamic_acls = 1;
1025 tpg->tpg_attrib.demo_mode_login_only = 1;
1026
1027 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1028 if (ret < 0) {
1029 kfree(tpg);
1030 return NULL;
1031 }
1032
1033 lport->tpg_1 = tpg;
1034
1035 return &tpg->se_tpg;
1036 }
1037
1038 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1039 {
1040 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1041 struct tcm_qla2xxx_tpg, se_tpg);
1042 struct tcm_qla2xxx_lport *lport = tpg->lport;
1043 struct scsi_qla_host *vha = lport->qla_vha;
1044 /*
1045 * Call into qla2x_target.c LLD logic to shutdown the active
1046 * FC Nexuses and disable target mode operation for this qla_hw_data
1047 */
1048 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1049 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1050
1051 core_tpg_deregister(se_tpg);
1052 /*
1053 * Clear local TPG=1 pointer for non NPIV mode.
1054 */
1055 lport->tpg_1 = NULL;
1056 kfree(tpg);
1057 }
1058
1059 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1060 char *page)
1061 {
1062 return tcm_qla2xxx_tpg_enable_show(item, page);
1063 }
1064
1065 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1066 const char *page, size_t count)
1067 {
1068 struct se_portal_group *se_tpg = to_tpg(item);
1069 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1070 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1071 struct tcm_qla2xxx_lport, lport_wwn);
1072 struct scsi_qla_host *vha = lport->qla_vha;
1073 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1074 struct tcm_qla2xxx_tpg, se_tpg);
1075 unsigned long op;
1076 int rc;
1077
1078 rc = kstrtoul(page, 0, &op);
1079 if (rc < 0) {
1080 pr_err("kstrtoul() returned %d\n", rc);
1081 return -EINVAL;
1082 }
1083 if ((op != 1) && (op != 0)) {
1084 pr_err("Illegal value for tpg_enable: %lu\n", op);
1085 return -EINVAL;
1086 }
1087 if (op) {
1088 if (atomic_read(&tpg->lport_tpg_enabled))
1089 return -EEXIST;
1090
1091 atomic_set(&tpg->lport_tpg_enabled, 1);
1092 qlt_enable_vha(vha);
1093 } else {
1094 if (!atomic_read(&tpg->lport_tpg_enabled))
1095 return count;
1096
1097 atomic_set(&tpg->lport_tpg_enabled, 0);
1098 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1099 }
1100
1101 return count;
1102 }
1103
1104 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1105
1106 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1107 &tcm_qla2xxx_npiv_tpg_attr_enable,
1108 NULL,
1109 };
1110
1111 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1112 struct se_wwn *wwn,
1113 struct config_group *group,
1114 const char *name)
1115 {
1116 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1117 struct tcm_qla2xxx_lport, lport_wwn);
1118 struct tcm_qla2xxx_tpg *tpg;
1119 unsigned long tpgt;
1120 int ret;
1121
1122 if (strstr(name, "tpgt_") != name)
1123 return ERR_PTR(-EINVAL);
1124 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1125 return ERR_PTR(-EINVAL);
1126
1127 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1128 if (!tpg) {
1129 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1130 return ERR_PTR(-ENOMEM);
1131 }
1132 tpg->lport = lport;
1133 tpg->lport_tpgt = tpgt;
1134
1135 /*
1136 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1137 * NodeACLs
1138 */
1139 tpg->tpg_attrib.generate_node_acls = 1;
1140 tpg->tpg_attrib.demo_mode_write_protect = 1;
1141 tpg->tpg_attrib.cache_dynamic_acls = 1;
1142 tpg->tpg_attrib.demo_mode_login_only = 1;
1143
1144 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1145 if (ret < 0) {
1146 kfree(tpg);
1147 return NULL;
1148 }
1149 lport->tpg_1 = tpg;
1150 return &tpg->se_tpg;
1151 }
1152
1153 /*
1154 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1155 */
1156 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
1157 scsi_qla_host_t *vha,
1158 const uint8_t *s_id)
1159 {
1160 struct tcm_qla2xxx_lport *lport;
1161 struct se_node_acl *se_nacl;
1162 struct tcm_qla2xxx_nacl *nacl;
1163 u32 key;
1164
1165 lport = vha->vha_tgt.target_lport_ptr;
1166 if (!lport) {
1167 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1168 dump_stack();
1169 return NULL;
1170 }
1171
1172 key = sid_to_key(s_id);
1173 pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1174
1175 se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1176 if (!se_nacl) {
1177 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1178 return NULL;
1179 }
1180 pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1181 se_nacl, se_nacl->initiatorname);
1182
1183 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1184 if (!nacl->qla_tgt_sess) {
1185 pr_err("Unable to locate struct qla_tgt_sess\n");
1186 return NULL;
1187 }
1188
1189 return nacl->qla_tgt_sess;
1190 }
1191
1192 /*
1193 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1194 */
1195 static void tcm_qla2xxx_set_sess_by_s_id(
1196 struct tcm_qla2xxx_lport *lport,
1197 struct se_node_acl *new_se_nacl,
1198 struct tcm_qla2xxx_nacl *nacl,
1199 struct se_session *se_sess,
1200 struct qla_tgt_sess *qla_tgt_sess,
1201 uint8_t *s_id)
1202 {
1203 u32 key;
1204 void *slot;
1205 int rc;
1206
1207 key = sid_to_key(s_id);
1208 pr_debug("set_sess_by_s_id: %06x\n", key);
1209
1210 slot = btree_lookup32(&lport->lport_fcport_map, key);
1211 if (!slot) {
1212 if (new_se_nacl) {
1213 pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1214 nacl->nport_id = key;
1215 rc = btree_insert32(&lport->lport_fcport_map, key,
1216 new_se_nacl, GFP_ATOMIC);
1217 if (rc)
1218 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1219 (int)key);
1220 } else {
1221 pr_debug("Wiping nonexisting fc_port entry\n");
1222 }
1223
1224 qla_tgt_sess->se_sess = se_sess;
1225 nacl->qla_tgt_sess = qla_tgt_sess;
1226 return;
1227 }
1228
1229 if (nacl->qla_tgt_sess) {
1230 if (new_se_nacl == NULL) {
1231 pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
1232 btree_remove32(&lport->lport_fcport_map, key);
1233 nacl->qla_tgt_sess = NULL;
1234 return;
1235 }
1236 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
1237 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1238 qla_tgt_sess->se_sess = se_sess;
1239 nacl->qla_tgt_sess = qla_tgt_sess;
1240 return;
1241 }
1242
1243 if (new_se_nacl == NULL) {
1244 pr_debug("Clearing existing fc_port entry\n");
1245 btree_remove32(&lport->lport_fcport_map, key);
1246 return;
1247 }
1248
1249 pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
1250 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1251 qla_tgt_sess->se_sess = se_sess;
1252 nacl->qla_tgt_sess = qla_tgt_sess;
1253
1254 pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
1255 nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1256 }
1257
1258 /*
1259 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1260 */
1261 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
1262 scsi_qla_host_t *vha,
1263 const uint16_t loop_id)
1264 {
1265 struct tcm_qla2xxx_lport *lport;
1266 struct se_node_acl *se_nacl;
1267 struct tcm_qla2xxx_nacl *nacl;
1268 struct tcm_qla2xxx_fc_loopid *fc_loopid;
1269
1270 lport = vha->vha_tgt.target_lport_ptr;
1271 if (!lport) {
1272 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1273 dump_stack();
1274 return NULL;
1275 }
1276
1277 pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1278
1279 fc_loopid = lport->lport_loopid_map + loop_id;
1280 se_nacl = fc_loopid->se_nacl;
1281 if (!se_nacl) {
1282 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1283 loop_id);
1284 return NULL;
1285 }
1286
1287 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1288
1289 if (!nacl->qla_tgt_sess) {
1290 pr_err("Unable to locate struct qla_tgt_sess\n");
1291 return NULL;
1292 }
1293
1294 return nacl->qla_tgt_sess;
1295 }
1296
1297 /*
1298 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1299 */
1300 static void tcm_qla2xxx_set_sess_by_loop_id(
1301 struct tcm_qla2xxx_lport *lport,
1302 struct se_node_acl *new_se_nacl,
1303 struct tcm_qla2xxx_nacl *nacl,
1304 struct se_session *se_sess,
1305 struct qla_tgt_sess *qla_tgt_sess,
1306 uint16_t loop_id)
1307 {
1308 struct se_node_acl *saved_nacl;
1309 struct tcm_qla2xxx_fc_loopid *fc_loopid;
1310
1311 pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1312
1313 fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1314 lport->lport_loopid_map)[loop_id];
1315
1316 saved_nacl = fc_loopid->se_nacl;
1317 if (!saved_nacl) {
1318 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1319 fc_loopid->se_nacl = new_se_nacl;
1320 if (qla_tgt_sess->se_sess != se_sess)
1321 qla_tgt_sess->se_sess = se_sess;
1322 if (nacl->qla_tgt_sess != qla_tgt_sess)
1323 nacl->qla_tgt_sess = qla_tgt_sess;
1324 return;
1325 }
1326
1327 if (nacl->qla_tgt_sess) {
1328 if (new_se_nacl == NULL) {
1329 pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1330 fc_loopid->se_nacl = NULL;
1331 nacl->qla_tgt_sess = NULL;
1332 return;
1333 }
1334
1335 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1336 fc_loopid->se_nacl = new_se_nacl;
1337 if (qla_tgt_sess->se_sess != se_sess)
1338 qla_tgt_sess->se_sess = se_sess;
1339 if (nacl->qla_tgt_sess != qla_tgt_sess)
1340 nacl->qla_tgt_sess = qla_tgt_sess;
1341 return;
1342 }
1343
1344 if (new_se_nacl == NULL) {
1345 pr_debug("Clearing fc_loopid->se_nacl\n");
1346 fc_loopid->se_nacl = NULL;
1347 return;
1348 }
1349
1350 pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
1351 fc_loopid->se_nacl = new_se_nacl;
1352 if (qla_tgt_sess->se_sess != se_sess)
1353 qla_tgt_sess->se_sess = se_sess;
1354 if (nacl->qla_tgt_sess != qla_tgt_sess)
1355 nacl->qla_tgt_sess = qla_tgt_sess;
1356
1357 pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1358 nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1359 }
1360
1361 /*
1362 * Should always be called with qla_hw_data->tgt.sess_lock held.
1363 */
1364 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1365 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
1366 {
1367 struct se_session *se_sess = sess->se_sess;
1368 unsigned char be_sid[3];
1369
1370 be_sid[0] = sess->s_id.b.domain;
1371 be_sid[1] = sess->s_id.b.area;
1372 be_sid[2] = sess->s_id.b.al_pa;
1373
1374 tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1375 sess, be_sid);
1376 tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1377 sess, sess->loop_id);
1378 }
1379
1380 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
1381 {
1382 struct qla_tgt *tgt = sess->tgt;
1383 struct qla_hw_data *ha = tgt->ha;
1384 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1385 struct se_session *se_sess;
1386 struct tcm_qla2xxx_lport *lport;
1387
1388 BUG_ON(in_interrupt());
1389
1390 se_sess = sess->se_sess;
1391 if (!se_sess) {
1392 pr_err("struct qla_tgt_sess->se_sess is NULL\n");
1393 dump_stack();
1394 return;
1395 }
1396
1397 lport = vha->vha_tgt.target_lport_ptr;
1398 if (!lport) {
1399 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1400 dump_stack();
1401 return;
1402 }
1403 target_wait_for_sess_cmds(se_sess);
1404
1405 transport_deregister_session_configfs(sess->se_sess);
1406 transport_deregister_session(sess->se_sess);
1407 }
1408
1409 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1410 struct se_session *se_sess, void *p)
1411 {
1412 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1413 struct tcm_qla2xxx_tpg, se_tpg);
1414 struct tcm_qla2xxx_lport *lport = tpg->lport;
1415 struct qla_hw_data *ha = lport->qla_vha->hw;
1416 struct se_node_acl *se_nacl = se_sess->se_node_acl;
1417 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1418 struct tcm_qla2xxx_nacl, se_node_acl);
1419 struct qla_tgt_sess *qlat_sess = p;
1420 uint16_t loop_id = qlat_sess->loop_id;
1421 unsigned long flags;
1422 unsigned char be_sid[3];
1423
1424 be_sid[0] = qlat_sess->s_id.b.domain;
1425 be_sid[1] = qlat_sess->s_id.b.area;
1426 be_sid[2] = qlat_sess->s_id.b.al_pa;
1427
1428 /*
1429 * And now setup se_nacl and session pointers into HW lport internal
1430 * mappings for fabric S_ID and LOOP_ID.
1431 */
1432 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1433 tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1434 se_sess, qlat_sess, be_sid);
1435 tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1436 se_sess, qlat_sess, loop_id);
1437 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1438
1439 return 0;
1440 }
1441
1442 /*
1443 * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1444 * to locate struct se_node_acl
1445 */
1446 static int tcm_qla2xxx_check_initiator_node_acl(
1447 scsi_qla_host_t *vha,
1448 unsigned char *fc_wwpn,
1449 struct qla_tgt_sess *qlat_sess)
1450 {
1451 struct qla_hw_data *ha = vha->hw;
1452 struct tcm_qla2xxx_lport *lport;
1453 struct tcm_qla2xxx_tpg *tpg;
1454 struct se_session *se_sess;
1455 unsigned char port_name[36];
1456 int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1457 TCM_QLA2XXX_DEFAULT_TAGS;
1458
1459 lport = vha->vha_tgt.target_lport_ptr;
1460 if (!lport) {
1461 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1462 dump_stack();
1463 return -EINVAL;
1464 }
1465 /*
1466 * Locate the TPG=1 reference..
1467 */
1468 tpg = lport->tpg_1;
1469 if (!tpg) {
1470 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1471 return -EINVAL;
1472 }
1473 /*
1474 * Format the FCP Initiator port_name into colon seperated values to
1475 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1476 */
1477 memset(&port_name, 0, 36);
1478 snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1479 /*
1480 * Locate our struct se_node_acl either from an explict NodeACL created
1481 * via ConfigFS, or via running in TPG demo mode.
1482 */
1483 se_sess = target_alloc_session(&tpg->se_tpg, num_tags,
1484 sizeof(struct qla_tgt_cmd),
1485 TARGET_PROT_ALL, port_name,
1486 qlat_sess, tcm_qla2xxx_session_cb);
1487 if (IS_ERR(se_sess))
1488 return PTR_ERR(se_sess);
1489
1490 return 0;
1491 }
1492
1493 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
1494 uint16_t loop_id, bool conf_compl_supported)
1495 {
1496 struct qla_tgt *tgt = sess->tgt;
1497 struct qla_hw_data *ha = tgt->ha;
1498 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1499 struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1500 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1501 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1502 struct tcm_qla2xxx_nacl, se_node_acl);
1503 u32 key;
1504
1505
1506 if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1507 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1508 sess, sess->port_name,
1509 sess->loop_id, loop_id, sess->s_id.b.domain,
1510 sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain,
1511 s_id.b.area, s_id.b.al_pa);
1512
1513 if (sess->loop_id != loop_id) {
1514 /*
1515 * Because we can shuffle loop IDs around and we
1516 * update different sessions non-atomically, we might
1517 * have overwritten this session's old loop ID
1518 * already, and we might end up overwriting some other
1519 * session that will be updated later. So we have to
1520 * be extra careful and we can't warn about those things...
1521 */
1522 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1523 lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1524
1525 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1526
1527 sess->loop_id = loop_id;
1528 }
1529
1530 if (sess->s_id.b24 != s_id.b24) {
1531 key = (((u32) sess->s_id.b.domain << 16) |
1532 ((u32) sess->s_id.b.area << 8) |
1533 ((u32) sess->s_id.b.al_pa));
1534
1535 if (btree_lookup32(&lport->lport_fcport_map, key))
1536 WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
1537 "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1538 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1539 else
1540 WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1541 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1542
1543 key = (((u32) s_id.b.domain << 16) |
1544 ((u32) s_id.b.area << 8) |
1545 ((u32) s_id.b.al_pa));
1546
1547 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1548 WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1549 s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1550 btree_update32(&lport->lport_fcport_map, key, se_nacl);
1551 } else {
1552 btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
1553 }
1554
1555 sess->s_id = s_id;
1556 nacl->nport_id = key;
1557 }
1558
1559 sess->conf_compl_supported = conf_compl_supported;
1560
1561 /* Reset logout parameters to default */
1562 sess->logout_on_delete = 1;
1563 sess->keep_nport_handle = 0;
1564 }
1565
1566 /*
1567 * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1568 */
1569 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1570 .handle_cmd = tcm_qla2xxx_handle_cmd,
1571 .handle_data = tcm_qla2xxx_handle_data,
1572 .handle_dif_err = tcm_qla2xxx_handle_dif_err,
1573 .handle_tmr = tcm_qla2xxx_handle_tmr,
1574 .free_cmd = tcm_qla2xxx_free_cmd,
1575 .free_mcmd = tcm_qla2xxx_free_mcmd,
1576 .free_session = tcm_qla2xxx_free_session,
1577 .update_sess = tcm_qla2xxx_update_sess,
1578 .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1579 .find_sess_by_s_id = tcm_qla2xxx_find_sess_by_s_id,
1580 .find_sess_by_loop_id = tcm_qla2xxx_find_sess_by_loop_id,
1581 .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1582 .put_sess = tcm_qla2xxx_put_sess,
1583 .shutdown_sess = tcm_qla2xxx_shutdown_sess,
1584 };
1585
1586 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1587 {
1588 int rc;
1589
1590 rc = btree_init32(&lport->lport_fcport_map);
1591 if (rc) {
1592 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1593 return rc;
1594 }
1595
1596 lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1597 65536);
1598 if (!lport->lport_loopid_map) {
1599 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1600 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1601 btree_destroy32(&lport->lport_fcport_map);
1602 return -ENOMEM;
1603 }
1604 memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1605 * 65536);
1606 pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1607 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1608 return 0;
1609 }
1610
1611 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1612 void *target_lport_ptr,
1613 u64 npiv_wwpn, u64 npiv_wwnn)
1614 {
1615 struct qla_hw_data *ha = vha->hw;
1616 struct tcm_qla2xxx_lport *lport =
1617 (struct tcm_qla2xxx_lport *)target_lport_ptr;
1618 /*
1619 * Setup tgt_ops, local pointer to vha and target_lport_ptr
1620 */
1621 ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1622 vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1623 lport->qla_vha = vha;
1624
1625 return 0;
1626 }
1627
1628 static struct se_wwn *tcm_qla2xxx_make_lport(
1629 struct target_fabric_configfs *tf,
1630 struct config_group *group,
1631 const char *name)
1632 {
1633 struct tcm_qla2xxx_lport *lport;
1634 u64 wwpn;
1635 int ret = -ENODEV;
1636
1637 if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1638 return ERR_PTR(-EINVAL);
1639
1640 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1641 if (!lport) {
1642 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1643 return ERR_PTR(-ENOMEM);
1644 }
1645 lport->lport_wwpn = wwpn;
1646 tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1647 wwpn);
1648 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1649
1650 ret = tcm_qla2xxx_init_lport(lport);
1651 if (ret != 0)
1652 goto out;
1653
1654 ret = qlt_lport_register(lport, wwpn, 0, 0,
1655 tcm_qla2xxx_lport_register_cb);
1656 if (ret != 0)
1657 goto out_lport;
1658
1659 return &lport->lport_wwn;
1660 out_lport:
1661 vfree(lport->lport_loopid_map);
1662 btree_destroy32(&lport->lport_fcport_map);
1663 out:
1664 kfree(lport);
1665 return ERR_PTR(ret);
1666 }
1667
1668 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1669 {
1670 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1671 struct tcm_qla2xxx_lport, lport_wwn);
1672 struct scsi_qla_host *vha = lport->qla_vha;
1673 struct se_node_acl *node;
1674 u32 key = 0;
1675
1676 /*
1677 * Call into qla2x_target.c LLD logic to complete the
1678 * shutdown of struct qla_tgt after the call to
1679 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1680 */
1681 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1682 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1683
1684 qlt_lport_deregister(vha);
1685
1686 vfree(lport->lport_loopid_map);
1687 btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1688 btree_remove32(&lport->lport_fcport_map, key);
1689 btree_destroy32(&lport->lport_fcport_map);
1690 kfree(lport);
1691 }
1692
1693 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1694 void *target_lport_ptr,
1695 u64 npiv_wwpn, u64 npiv_wwnn)
1696 {
1697 struct fc_vport *vport;
1698 struct Scsi_Host *sh = base_vha->host;
1699 struct scsi_qla_host *npiv_vha;
1700 struct tcm_qla2xxx_lport *lport =
1701 (struct tcm_qla2xxx_lport *)target_lport_ptr;
1702 struct tcm_qla2xxx_lport *base_lport =
1703 (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1704 struct fc_vport_identifiers vport_id;
1705
1706 if (!qla_tgt_mode_enabled(base_vha)) {
1707 pr_err("qla2xxx base_vha not enabled for target mode\n");
1708 return -EPERM;
1709 }
1710
1711 if (!base_lport || !base_lport->tpg_1 ||
1712 !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1713 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1714 return -EPERM;
1715 }
1716
1717 memset(&vport_id, 0, sizeof(vport_id));
1718 vport_id.port_name = npiv_wwpn;
1719 vport_id.node_name = npiv_wwnn;
1720 vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1721 vport_id.vport_type = FC_PORTTYPE_NPIV;
1722 vport_id.disable = false;
1723
1724 vport = fc_vport_create(sh, 0, &vport_id);
1725 if (!vport) {
1726 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1727 return -ENODEV;
1728 }
1729 /*
1730 * Setup local pointer to NPIV vhba + target_lport_ptr
1731 */
1732 npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1733 npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1734 lport->qla_vha = npiv_vha;
1735 scsi_host_get(npiv_vha->host);
1736 return 0;
1737 }
1738
1739
1740 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1741 struct target_fabric_configfs *tf,
1742 struct config_group *group,
1743 const char *name)
1744 {
1745 struct tcm_qla2xxx_lport *lport;
1746 u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1747 char *p, tmp[128];
1748 int ret;
1749
1750 snprintf(tmp, 128, "%s", name);
1751
1752 p = strchr(tmp, '@');
1753 if (!p) {
1754 pr_err("Unable to locate NPIV '@' seperator\n");
1755 return ERR_PTR(-EINVAL);
1756 }
1757 *p++ = '\0';
1758
1759 if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1760 return ERR_PTR(-EINVAL);
1761
1762 if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1763 &npiv_wwpn, &npiv_wwnn) < 0)
1764 return ERR_PTR(-EINVAL);
1765
1766 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1767 if (!lport) {
1768 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1769 return ERR_PTR(-ENOMEM);
1770 }
1771 lport->lport_npiv_wwpn = npiv_wwpn;
1772 lport->lport_npiv_wwnn = npiv_wwnn;
1773 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1774
1775 ret = tcm_qla2xxx_init_lport(lport);
1776 if (ret != 0)
1777 goto out;
1778
1779 ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1780 tcm_qla2xxx_lport_register_npiv_cb);
1781 if (ret != 0)
1782 goto out_lport;
1783
1784 return &lport->lport_wwn;
1785 out_lport:
1786 vfree(lport->lport_loopid_map);
1787 btree_destroy32(&lport->lport_fcport_map);
1788 out:
1789 kfree(lport);
1790 return ERR_PTR(ret);
1791 }
1792
1793 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1794 {
1795 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1796 struct tcm_qla2xxx_lport, lport_wwn);
1797 struct scsi_qla_host *npiv_vha = lport->qla_vha;
1798 struct qla_hw_data *ha = npiv_vha->hw;
1799 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1800
1801 scsi_host_put(npiv_vha->host);
1802 /*
1803 * Notify libfc that we want to release the vha->fc_vport
1804 */
1805 fc_vport_terminate(npiv_vha->fc_vport);
1806 scsi_host_put(base_vha->host);
1807 kfree(lport);
1808 }
1809
1810
1811 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1812 char *page)
1813 {
1814 return sprintf(page,
1815 "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1816 UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1817 utsname()->machine);
1818 }
1819
1820 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1821
1822 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1823 &tcm_qla2xxx_wwn_attr_version,
1824 NULL,
1825 };
1826
1827 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1828 .module = THIS_MODULE,
1829 .name = "qla2xxx",
1830 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl),
1831 /*
1832 * XXX: Limit assumes single page per scatter-gather-list entry.
1833 * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1834 */
1835 .max_data_sg_nents = 1200,
1836 .get_fabric_name = tcm_qla2xxx_get_fabric_name,
1837 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
1838 .tpg_get_tag = tcm_qla2xxx_get_tag,
1839 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode,
1840 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache,
1841 .tpg_check_demo_mode_write_protect =
1842 tcm_qla2xxx_check_demo_write_protect,
1843 .tpg_check_prod_mode_write_protect =
1844 tcm_qla2xxx_check_prod_write_protect,
1845 .tpg_check_prot_fabric_only = tcm_qla2xxx_check_prot_fabric_only,
1846 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1847 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
1848 .check_stop_free = tcm_qla2xxx_check_stop_free,
1849 .release_cmd = tcm_qla2xxx_release_cmd,
1850 .shutdown_session = tcm_qla2xxx_shutdown_session,
1851 .close_session = tcm_qla2xxx_close_session,
1852 .sess_get_index = tcm_qla2xxx_sess_get_index,
1853 .sess_get_initiator_sid = NULL,
1854 .write_pending = tcm_qla2xxx_write_pending,
1855 .write_pending_status = tcm_qla2xxx_write_pending_status,
1856 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
1857 .get_cmd_state = tcm_qla2xxx_get_cmd_state,
1858 .queue_data_in = tcm_qla2xxx_queue_data_in,
1859 .queue_status = tcm_qla2xxx_queue_status,
1860 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
1861 .aborted_task = tcm_qla2xxx_aborted_task,
1862 /*
1863 * Setup function pointers for generic logic in
1864 * target_core_fabric_configfs.c
1865 */
1866 .fabric_make_wwn = tcm_qla2xxx_make_lport,
1867 .fabric_drop_wwn = tcm_qla2xxx_drop_lport,
1868 .fabric_make_tpg = tcm_qla2xxx_make_tpg,
1869 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
1870 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl,
1871
1872 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
1873 .tfc_tpg_base_attrs = tcm_qla2xxx_tpg_attrs,
1874 .tfc_tpg_attrib_attrs = tcm_qla2xxx_tpg_attrib_attrs,
1875 };
1876
1877 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1878 .module = THIS_MODULE,
1879 .name = "qla2xxx_npiv",
1880 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl),
1881 .get_fabric_name = tcm_qla2xxx_npiv_get_fabric_name,
1882 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
1883 .tpg_get_tag = tcm_qla2xxx_get_tag,
1884 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode,
1885 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache,
1886 .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1887 .tpg_check_prod_mode_write_protect =
1888 tcm_qla2xxx_check_prod_write_protect,
1889 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1890 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
1891 .check_stop_free = tcm_qla2xxx_check_stop_free,
1892 .release_cmd = tcm_qla2xxx_release_cmd,
1893 .shutdown_session = tcm_qla2xxx_shutdown_session,
1894 .close_session = tcm_qla2xxx_close_session,
1895 .sess_get_index = tcm_qla2xxx_sess_get_index,
1896 .sess_get_initiator_sid = NULL,
1897 .write_pending = tcm_qla2xxx_write_pending,
1898 .write_pending_status = tcm_qla2xxx_write_pending_status,
1899 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
1900 .get_cmd_state = tcm_qla2xxx_get_cmd_state,
1901 .queue_data_in = tcm_qla2xxx_queue_data_in,
1902 .queue_status = tcm_qla2xxx_queue_status,
1903 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
1904 .aborted_task = tcm_qla2xxx_aborted_task,
1905 /*
1906 * Setup function pointers for generic logic in
1907 * target_core_fabric_configfs.c
1908 */
1909 .fabric_make_wwn = tcm_qla2xxx_npiv_make_lport,
1910 .fabric_drop_wwn = tcm_qla2xxx_npiv_drop_lport,
1911 .fabric_make_tpg = tcm_qla2xxx_npiv_make_tpg,
1912 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
1913 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl,
1914
1915 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
1916 .tfc_tpg_base_attrs = tcm_qla2xxx_npiv_tpg_attrs,
1917 };
1918
1919 static int tcm_qla2xxx_register_configfs(void)
1920 {
1921 int ret;
1922
1923 pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1924 UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1925 utsname()->machine);
1926
1927 ret = target_register_template(&tcm_qla2xxx_ops);
1928 if (ret)
1929 return ret;
1930
1931 ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1932 if (ret)
1933 goto out_fabric;
1934
1935 tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1936 WQ_MEM_RECLAIM, 0);
1937 if (!tcm_qla2xxx_free_wq) {
1938 ret = -ENOMEM;
1939 goto out_fabric_npiv;
1940 }
1941
1942 tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1943 if (!tcm_qla2xxx_cmd_wq) {
1944 ret = -ENOMEM;
1945 goto out_free_wq;
1946 }
1947
1948 return 0;
1949
1950 out_free_wq:
1951 destroy_workqueue(tcm_qla2xxx_free_wq);
1952 out_fabric_npiv:
1953 target_unregister_template(&tcm_qla2xxx_npiv_ops);
1954 out_fabric:
1955 target_unregister_template(&tcm_qla2xxx_ops);
1956 return ret;
1957 }
1958
1959 static void tcm_qla2xxx_deregister_configfs(void)
1960 {
1961 destroy_workqueue(tcm_qla2xxx_cmd_wq);
1962 destroy_workqueue(tcm_qla2xxx_free_wq);
1963
1964 target_unregister_template(&tcm_qla2xxx_ops);
1965 target_unregister_template(&tcm_qla2xxx_npiv_ops);
1966 }
1967
1968 static int __init tcm_qla2xxx_init(void)
1969 {
1970 int ret;
1971
1972 ret = tcm_qla2xxx_register_configfs();
1973 if (ret < 0)
1974 return ret;
1975
1976 return 0;
1977 }
1978
1979 static void __exit tcm_qla2xxx_exit(void)
1980 {
1981 tcm_qla2xxx_deregister_configfs();
1982 }
1983
1984 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1985 MODULE_LICENSE("GPL");
1986 module_init(tcm_qla2xxx_init);
1987 module_exit(tcm_qla2xxx_exit);
Linux with added FPC-III support