1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*******************************************************************************
3 * This file contains tcm implementation using v4 configfs fabric infrastructure
4 * for QLogic target mode HBAs
5 *
6 * (c) Copyright 2010-2013 Datera, Inc.
7 *
8 * Author: Nicholas A. Bellinger <nab@daterainc.com>
9 *
10 * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
11 * the TCM_FC / Open-FCoE.org fabric module.
12 *
13 * Copyright (c) 2010 Cisco Systems, Inc
14 *
15 ****************************************************************************/
16
17
18 #include <linux/module.h>
19 #include <linux/utsname.h>
20 #include <linux/vmalloc.h>
21 #include <linux/list.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/string.h>
25 #include <linux/configfs.h>
26 #include <linux/ctype.h>
27 #include <asm/unaligned.h>
28 #include <scsi/scsi_host.h>
29 #include <target/target_core_base.h>
30 #include <target/target_core_fabric.h>
31
32 #include "qla_def.h"
33 #include "qla_target.h"
34 #include "tcm_qla2xxx.h"
35
36 static struct workqueue_struct *tcm_qla2xxx_free_wq;
37
38 /*
39 * Parse WWN.
40 * If strict, we require lower-case hex and colon separators to be sure
41 * the name is the same as what would be generated by ft_format_wwn()
42 * so the name and wwn are mapped one-to-one.
43 */
tcm_qla2xxx_parse_wwn(const char * name,u64 * wwn,int strict)44 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
45 {
46 const char *cp;
47 char c;
48 u32 nibble;
49 u32 byte = 0;
50 u32 pos = 0;
51 u32 err;
52
53 *wwn = 0;
54 for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
55 c = *cp;
56 if (c == '\n' && cp[1] == '\0')
57 continue;
58 if (strict && pos++ == 2 && byte++ < 7) {
59 pos = 0;
60 if (c == ':')
61 continue;
62 err = 1;
63 goto fail;
64 }
65 if (c == '\0') {
66 err = 2;
67 if (strict && byte != 8)
68 goto fail;
69 return cp - name;
70 }
71 err = 3;
72 if (isdigit(c))
73 nibble = c - '0';
74 else if (isxdigit(c) && (islower(c) || !strict))
75 nibble = tolower(c) - 'a' + 10;
76 else
77 goto fail;
78 *wwn = (*wwn << 4) | nibble;
79 }
80 err = 4;
81 fail:
82 pr_debug("err %u len %zu pos %u byte %u\n",
83 err, cp - name, pos, byte);
84 return -1;
85 }
86
tcm_qla2xxx_format_wwn(char * buf,size_t len,u64 wwn)87 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
88 {
89 u8 b[8];
90
91 put_unaligned_be64(wwn, b);
92 return snprintf(buf, len,
93 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
94 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
95 }
96
97 /*
98 * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
99 */
tcm_qla2xxx_npiv_extract_wwn(const char * ns,u64 * nm)100 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
101 {
102 unsigned int i, j;
103 u8 wwn[8];
104
105 memset(wwn, 0, sizeof(wwn));
106
107 /* Validate and store the new name */
108 for (i = 0, j = 0; i < 16; i++) {
109 int value;
110
111 value = hex_to_bin(*ns++);
112 if (value >= 0)
113 j = (j << 4) | value;
114 else
115 return -EINVAL;
116
117 if (i % 2) {
118 wwn[i/2] = j & 0xff;
119 j = 0;
120 }
121 }
122
123 *nm = wwn_to_u64(wwn);
124 return 0;
125 }
126
127 /*
128 * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
129 * store_fc_host_vport_create()
130 */
tcm_qla2xxx_npiv_parse_wwn(const char * name,size_t count,u64 * wwpn,u64 * wwnn)131 static int tcm_qla2xxx_npiv_parse_wwn(
132 const char *name,
133 size_t count,
134 u64 *wwpn,
135 u64 *wwnn)
136 {
137 unsigned int cnt = count;
138 int rc;
139
140 *wwpn = 0;
141 *wwnn = 0;
142
143 /* count may include a LF at end of string */
144 if (name[cnt-1] == '\n' || name[cnt-1] == 0)
145 cnt--;
146
147 /* validate we have enough characters for WWPN */
148 if ((cnt != (16+1+16)) || (name[16] != ':'))
149 return -EINVAL;
150
151 rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
152 if (rc != 0)
153 return rc;
154
155 rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
156 if (rc != 0)
157 return rc;
158
159 return 0;
160 }
161
tcm_qla2xxx_get_fabric_wwn(struct se_portal_group * se_tpg)162 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
163 {
164 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
165 struct tcm_qla2xxx_tpg, se_tpg);
166 struct tcm_qla2xxx_lport *lport = tpg->lport;
167
168 return lport->lport_naa_name;
169 }
170
tcm_qla2xxx_get_tag(struct se_portal_group * se_tpg)171 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
172 {
173 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
174 struct tcm_qla2xxx_tpg, se_tpg);
175 return tpg->lport_tpgt;
176 }
177
tcm_qla2xxx_check_demo_mode(struct se_portal_group * se_tpg)178 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
179 {
180 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
181 struct tcm_qla2xxx_tpg, se_tpg);
182
183 return tpg->tpg_attrib.generate_node_acls;
184 }
185
tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group * se_tpg)186 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
187 {
188 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
189 struct tcm_qla2xxx_tpg, se_tpg);
190
191 return tpg->tpg_attrib.cache_dynamic_acls;
192 }
193
tcm_qla2xxx_check_demo_write_protect(struct se_portal_group * se_tpg)194 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
195 {
196 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
197 struct tcm_qla2xxx_tpg, se_tpg);
198
199 return tpg->tpg_attrib.demo_mode_write_protect;
200 }
201
tcm_qla2xxx_check_prod_write_protect(struct se_portal_group * se_tpg)202 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
203 {
204 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
205 struct tcm_qla2xxx_tpg, se_tpg);
206
207 return tpg->tpg_attrib.prod_mode_write_protect;
208 }
209
tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group * se_tpg)210 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
211 {
212 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
213 struct tcm_qla2xxx_tpg, se_tpg);
214
215 return tpg->tpg_attrib.demo_mode_login_only;
216 }
217
tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group * se_tpg)218 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
219 {
220 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
221 struct tcm_qla2xxx_tpg, se_tpg);
222
223 return tpg->tpg_attrib.fabric_prot_type;
224 }
225
tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group * se_tpg)226 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
227 {
228 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
229 struct tcm_qla2xxx_tpg, se_tpg);
230
231 return tpg->lport_tpgt;
232 }
233
tcm_qla2xxx_complete_mcmd(struct work_struct * work)234 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
235 {
236 struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
237 struct qla_tgt_mgmt_cmd, free_work);
238
239 transport_generic_free_cmd(&mcmd->se_cmd, 0);
240 }
241
242 /*
243 * Called from qla_target_template->free_mcmd(), and will call
244 * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
245 * release callback. qla_hw_data->hardware_lock is expected to be held
246 */
tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd * mcmd)247 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
248 {
249 if (!mcmd)
250 return;
251 INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
252 queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
253 }
254
tcm_qla2xxx_complete_free(struct work_struct * work)255 static void tcm_qla2xxx_complete_free(struct work_struct *work)
256 {
257 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
258 unsigned long flags;
259
260 cmd->cmd_in_wq = 0;
261
262 WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
263
264 /* To do: protect all tgt_counters manipulations with proper locking. */
265 cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
266 cmd->trc_flags |= TRC_CMD_FREE;
267 cmd->cmd_sent_to_fw = 0;
268
269 spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
270 list_del_init(&cmd->sess_cmd_list);
271 spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
272
273 transport_generic_free_cmd(&cmd->se_cmd, 0);
274 }
275
tcm_qla2xxx_get_cmd(struct fc_port * sess)276 static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess)
277 {
278 struct se_session *se_sess = sess->se_sess;
279 struct qla_tgt_cmd *cmd;
280 int tag, cpu;
281
282 tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
283 if (tag < 0)
284 return NULL;
285
286 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
287 memset(cmd, 0, sizeof(struct qla_tgt_cmd));
288 cmd->se_cmd.map_tag = tag;
289 cmd->se_cmd.map_cpu = cpu;
290
291 return cmd;
292 }
293
tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd * cmd)294 static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
295 {
296 target_free_tag(cmd->sess->se_sess, &cmd->se_cmd);
297 }
298
299 /*
300 * Called from qla_target_template->free_cmd(), and will call
301 * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
302 * release callback. qla_hw_data->hardware_lock is expected to be held
303 */
tcm_qla2xxx_free_cmd(struct qla_tgt_cmd * cmd)304 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
305 {
306 cmd->qpair->tgt_counters.core_qla_free_cmd++;
307 cmd->cmd_in_wq = 1;
308
309 WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
310 cmd->trc_flags |= TRC_CMD_DONE;
311
312 INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
313 queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
314 }
315
316 /*
317 * Called from struct target_core_fabric_ops->check_stop_free() context
318 */
tcm_qla2xxx_check_stop_free(struct se_cmd * se_cmd)319 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
320 {
321 struct qla_tgt_cmd *cmd;
322
323 if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
324 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
325 cmd->trc_flags |= TRC_CMD_CHK_STOP;
326 }
327
328 return target_put_sess_cmd(se_cmd);
329 }
330
331 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
332 * fabric descriptor @se_cmd command to release
333 */
tcm_qla2xxx_release_cmd(struct se_cmd * se_cmd)334 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
335 {
336 struct qla_tgt_cmd *cmd;
337
338 if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
339 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
340 struct qla_tgt_mgmt_cmd, se_cmd);
341 qlt_free_mcmd(mcmd);
342 return;
343 }
344 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
345
346 if (WARN_ON(cmd->cmd_sent_to_fw))
347 return;
348
349 qlt_free_cmd(cmd);
350 }
351
tcm_qla2xxx_release_session(struct kref * kref)352 static void tcm_qla2xxx_release_session(struct kref *kref)
353 {
354 struct fc_port *sess = container_of(kref,
355 struct fc_port, sess_kref);
356
357 qlt_unreg_sess(sess);
358 }
359
tcm_qla2xxx_put_sess(struct fc_port * sess)360 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
361 {
362 if (!sess)
363 return;
364
365 kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
366 }
367
tcm_qla2xxx_close_session(struct se_session * se_sess)368 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
369 {
370 struct fc_port *sess = se_sess->fabric_sess_ptr;
371
372 BUG_ON(!sess);
373
374 target_stop_session(se_sess);
375
376 sess->explicit_logout = 1;
377 tcm_qla2xxx_put_sess(sess);
378 }
379
tcm_qla2xxx_sess_get_index(struct se_session * se_sess)380 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
381 {
382 return 0;
383 }
384
tcm_qla2xxx_write_pending(struct se_cmd * se_cmd)385 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
386 {
387 struct qla_tgt_cmd *cmd = container_of(se_cmd,
388 struct qla_tgt_cmd, se_cmd);
389
390 if (cmd->aborted) {
391 /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
392 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
393 * already kick start the free.
394 */
395 pr_debug("write_pending aborted cmd[%p] refcount %d "
396 "transport_state %x, t_state %x, se_cmd_flags %x\n",
397 cmd, kref_read(&cmd->se_cmd.cmd_kref),
398 cmd->se_cmd.transport_state,
399 cmd->se_cmd.t_state,
400 cmd->se_cmd.se_cmd_flags);
401 transport_generic_request_failure(&cmd->se_cmd,
402 TCM_CHECK_CONDITION_ABORT_CMD);
403 return 0;
404 }
405 cmd->trc_flags |= TRC_XFR_RDY;
406 cmd->bufflen = se_cmd->data_length;
407 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
408
409 cmd->sg_cnt = se_cmd->t_data_nents;
410 cmd->sg = se_cmd->t_data_sg;
411
412 cmd->prot_sg_cnt = se_cmd->t_prot_nents;
413 cmd->prot_sg = se_cmd->t_prot_sg;
414 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size;
415 se_cmd->pi_err = 0;
416
417 /*
418 * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
419 * the SGL mappings into PCIe memory for incoming FCP WRITE data.
420 */
421 return qlt_rdy_to_xfer(cmd);
422 }
423
tcm_qla2xxx_set_default_node_attrs(struct se_node_acl * nacl)424 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
425 {
426 return;
427 }
428
tcm_qla2xxx_get_cmd_state(struct se_cmd * se_cmd)429 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
430 {
431 if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
432 struct qla_tgt_cmd *cmd = container_of(se_cmd,
433 struct qla_tgt_cmd, se_cmd);
434 return cmd->state;
435 }
436
437 return 0;
438 }
439
440 /*
441 * Called from process context in qla_target.c:qlt_do_work() code
442 */
tcm_qla2xxx_handle_cmd(scsi_qla_host_t * vha,struct qla_tgt_cmd * cmd,unsigned char * cdb,uint32_t data_length,int fcp_task_attr,int data_dir,int bidi)443 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
444 unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
445 int data_dir, int bidi)
446 {
447 struct se_cmd *se_cmd = &cmd->se_cmd;
448 struct se_session *se_sess;
449 struct fc_port *sess;
450 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
451 struct se_portal_group *se_tpg;
452 struct tcm_qla2xxx_tpg *tpg;
453 #endif
454 int rc, target_flags = TARGET_SCF_ACK_KREF;
455 unsigned long flags;
456
457 if (bidi)
458 target_flags |= TARGET_SCF_BIDI_OP;
459
460 if (se_cmd->cpuid != WORK_CPU_UNBOUND)
461 target_flags |= TARGET_SCF_USE_CPUID;
462
463 sess = cmd->sess;
464 if (!sess) {
465 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
466 return -EINVAL;
467 }
468
469 se_sess = sess->se_sess;
470 if (!se_sess) {
471 pr_err("Unable to locate active struct se_session\n");
472 return -EINVAL;
473 }
474
475 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
476 se_tpg = se_sess->se_tpg;
477 tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
478 if (unlikely(tpg->tpg_attrib.jam_host)) {
479 /* return, and dont run target_submit_cmd,discarding command */
480 return 0;
481 }
482 #endif
483 cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
484
485 spin_lock_irqsave(&sess->sess_cmd_lock, flags);
486 list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list);
487 spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
488
489 rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0],
490 cmd->unpacked_lun, data_length, fcp_task_attr,
491 data_dir, target_flags);
492 if (rc)
493 return rc;
494
495 if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0,
496 GFP_KERNEL))
497 return 0;
498
499 target_submit(se_cmd);
500 return 0;
501 }
502
tcm_qla2xxx_handle_data_work(struct work_struct * work)503 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
504 {
505 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
506
507 /*
508 * Ensure that the complete FCP WRITE payload has been received.
509 * Otherwise return an exception via CHECK_CONDITION status.
510 */
511 cmd->cmd_in_wq = 0;
512 cmd->cmd_sent_to_fw = 0;
513 if (cmd->aborted) {
514 transport_generic_request_failure(&cmd->se_cmd,
515 TCM_CHECK_CONDITION_ABORT_CMD);
516 return;
517 }
518
519 cmd->qpair->tgt_counters.qla_core_ret_ctio++;
520 if (!cmd->write_data_transferred) {
521 switch (cmd->dif_err_code) {
522 case DIF_ERR_GRD:
523 cmd->se_cmd.pi_err =
524 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
525 break;
526 case DIF_ERR_REF:
527 cmd->se_cmd.pi_err =
528 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
529 break;
530 case DIF_ERR_APP:
531 cmd->se_cmd.pi_err =
532 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
533 break;
534 case DIF_ERR_NONE:
535 default:
536 break;
537 }
538
539 if (cmd->se_cmd.pi_err)
540 transport_generic_request_failure(&cmd->se_cmd,
541 cmd->se_cmd.pi_err);
542 else
543 transport_generic_request_failure(&cmd->se_cmd,
544 TCM_CHECK_CONDITION_ABORT_CMD);
545
546 return;
547 }
548
549 return target_execute_cmd(&cmd->se_cmd);
550 }
551
552 /*
553 * Called from qla_target.c:qlt_do_ctio_completion()
554 */
tcm_qla2xxx_handle_data(struct qla_tgt_cmd * cmd)555 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
556 {
557 cmd->trc_flags |= TRC_DATA_IN;
558 cmd->cmd_in_wq = 1;
559 INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
560 queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
561 }
562
tcm_qla2xxx_chk_dif_tags(uint32_t tag)563 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
564 {
565 return 0;
566 }
567
tcm_qla2xxx_dif_tags(struct qla_tgt_cmd * cmd,uint16_t * pfw_prot_opts)568 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
569 uint16_t *pfw_prot_opts)
570 {
571 struct se_cmd *se_cmd = &cmd->se_cmd;
572
573 if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
574 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
575
576 if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
577 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
578
579 return 0;
580 }
581
582 /*
583 * Called from qla_target.c:qlt_issue_task_mgmt()
584 */
tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd * mcmd,u64 lun,uint16_t tmr_func,uint32_t tag)585 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
586 uint16_t tmr_func, uint32_t tag)
587 {
588 struct fc_port *sess = mcmd->sess;
589 struct se_cmd *se_cmd = &mcmd->se_cmd;
590 int transl_tmr_func = 0;
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 break;
597 case QLA_TGT_2G_ABORT_TASK:
598 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
599 transl_tmr_func = TMR_ABORT_TASK;
600 break;
601 case QLA_TGT_CLEAR_ACA:
602 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
603 transl_tmr_func = TMR_CLEAR_ACA;
604 break;
605 case QLA_TGT_TARGET_RESET:
606 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
607 transl_tmr_func = TMR_TARGET_WARM_RESET;
608 break;
609 case QLA_TGT_LUN_RESET:
610 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
611 transl_tmr_func = TMR_LUN_RESET;
612 break;
613 case QLA_TGT_CLEAR_TS:
614 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
615 transl_tmr_func = TMR_CLEAR_TASK_SET;
616 break;
617 case QLA_TGT_ABORT_TS:
618 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
619 transl_tmr_func = TMR_ABORT_TASK_SET;
620 break;
621 default:
622 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
623 sess->vha->host_no, tmr_func);
624 return -ENOSYS;
625 }
626
627 return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
628 transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
629 }
630
tcm_qla2xxx_find_cmd_by_tag(struct fc_port * sess,uint64_t tag)631 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
632 uint64_t tag)
633 {
634 struct qla_tgt_cmd *cmd;
635 unsigned long flags;
636
637 if (!sess->se_sess)
638 return NULL;
639
640 spin_lock_irqsave(&sess->sess_cmd_lock, flags);
641 list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) {
642 if (cmd->se_cmd.tag == tag)
643 goto done;
644 }
645 cmd = NULL;
646 done:
647 spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
648
649 return cmd;
650 }
651
tcm_qla2xxx_queue_data_in(struct se_cmd * se_cmd)652 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
653 {
654 struct qla_tgt_cmd *cmd = container_of(se_cmd,
655 struct qla_tgt_cmd, se_cmd);
656
657 if (cmd->aborted) {
658 /* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
659 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
660 * already kick start the free.
661 */
662 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
663 "transport_state %x, t_state %x, se_cmd_flags %x\n",
664 cmd, kref_read(&cmd->se_cmd.cmd_kref),
665 cmd->se_cmd.transport_state,
666 cmd->se_cmd.t_state,
667 cmd->se_cmd.se_cmd_flags);
668 return 0;
669 }
670
671 cmd->trc_flags |= TRC_XMIT_DATA;
672 cmd->bufflen = se_cmd->data_length;
673 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
674
675 cmd->sg_cnt = se_cmd->t_data_nents;
676 cmd->sg = se_cmd->t_data_sg;
677 cmd->offset = 0;
678
679 cmd->prot_sg_cnt = se_cmd->t_prot_nents;
680 cmd->prot_sg = se_cmd->t_prot_sg;
681 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size;
682 se_cmd->pi_err = 0;
683
684 /*
685 * Now queue completed DATA_IN the qla2xxx LLD and response ring
686 */
687 return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
688 se_cmd->scsi_status);
689 }
690
tcm_qla2xxx_queue_status(struct se_cmd * se_cmd)691 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
692 {
693 struct qla_tgt_cmd *cmd = container_of(se_cmd,
694 struct qla_tgt_cmd, se_cmd);
695 int xmit_type = QLA_TGT_XMIT_STATUS;
696
697 if (cmd->aborted) {
698 /*
699 * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
700 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
701 * already kick start the free.
702 */
703 pr_debug(
704 "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
705 cmd, kref_read(&cmd->se_cmd.cmd_kref),
706 cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
707 cmd->se_cmd.se_cmd_flags);
708 return 0;
709 }
710 cmd->bufflen = se_cmd->data_length;
711 cmd->sg = NULL;
712 cmd->sg_cnt = 0;
713 cmd->offset = 0;
714 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
715 cmd->trc_flags |= TRC_XMIT_STATUS;
716
717 if (se_cmd->data_direction == DMA_FROM_DEVICE) {
718 /*
719 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
720 * for qla_tgt_xmit_response LLD code
721 */
722 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
723 se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
724 se_cmd->residual_count = 0;
725 }
726 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
727 se_cmd->residual_count += se_cmd->data_length;
728
729 cmd->bufflen = 0;
730 }
731 /*
732 * Now queue status response to qla2xxx LLD code and response ring
733 */
734 return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
735 }
736
tcm_qla2xxx_queue_tm_rsp(struct se_cmd * se_cmd)737 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
738 {
739 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
740 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
741 struct qla_tgt_mgmt_cmd, se_cmd);
742
743 pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
744 mcmd, se_tmr->function, se_tmr->response);
745 /*
746 * Do translation between TCM TM response codes and
747 * QLA2xxx FC TM response codes.
748 */
749 switch (se_tmr->response) {
750 case TMR_FUNCTION_COMPLETE:
751 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
752 break;
753 case TMR_TASK_DOES_NOT_EXIST:
754 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
755 break;
756 case TMR_FUNCTION_REJECTED:
757 mcmd->fc_tm_rsp = FC_TM_REJECT;
758 break;
759 case TMR_LUN_DOES_NOT_EXIST:
760 default:
761 mcmd->fc_tm_rsp = FC_TM_FAILED;
762 break;
763 }
764 /*
765 * Queue the TM response to QLA2xxx LLD to build a
766 * CTIO response packet.
767 */
768 qlt_xmit_tm_rsp(mcmd);
769 }
770
tcm_qla2xxx_aborted_task(struct se_cmd * se_cmd)771 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
772 {
773 struct qla_tgt_cmd *cmd;
774 unsigned long flags;
775
776 if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
777 return;
778
779 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
780
781 spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
782 list_del_init(&cmd->sess_cmd_list);
783 spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
784
785 qlt_abort_cmd(cmd);
786 }
787
788 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
789 struct tcm_qla2xxx_nacl *, struct fc_port *);
790 /*
791 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
792 */
tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port * sess)793 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
794 {
795 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
796 struct se_portal_group *se_tpg = se_nacl->se_tpg;
797 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
798 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
799 struct tcm_qla2xxx_lport, lport_wwn);
800 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
801 struct tcm_qla2xxx_nacl, se_node_acl);
802 void *node;
803
804 pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
805
806 node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
807 if (WARN_ON(node && (node != se_nacl))) {
808 /*
809 * The nacl no longer matches what we think it should be.
810 * Most likely a new dynamic acl has been added while
811 * someone dropped the hardware lock. It clearly is a
812 * bug elsewhere, but this bit can't make things worse.
813 */
814 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
815 node, GFP_ATOMIC);
816 }
817
818 pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
819 se_nacl, nacl->nport_wwnn, nacl->nport_id);
820 /*
821 * Now clear the se_nacl and session pointers from our HW lport lookup
822 * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
823 *
824 * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
825 * target_wait_for_sess_cmds() before the session waits for outstanding
826 * I/O to complete, to avoid a race between session shutdown execution
827 * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
828 */
829 tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
830 }
831
tcm_qla2xxx_shutdown_sess(struct fc_port * sess)832 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
833 {
834 target_stop_session(sess->se_sess);
835 }
836
tcm_qla2xxx_init_nodeacl(struct se_node_acl * se_nacl,const char * name)837 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
838 const char *name)
839 {
840 struct tcm_qla2xxx_nacl *nacl =
841 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
842 u64 wwnn;
843
844 if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
845 return -EINVAL;
846
847 nacl->nport_wwnn = wwnn;
848 tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
849
850 return 0;
851 }
852
853 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
854
855 #define DEF_QLA_TPG_ATTRIB(name) \
856 \
857 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show( \
858 struct config_item *item, char *page) \
859 { \
860 struct se_portal_group *se_tpg = attrib_to_tpg(item); \
861 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
862 struct tcm_qla2xxx_tpg, se_tpg); \
863 \
864 return sprintf(page, "%d\n", tpg->tpg_attrib.name); \
865 } \
866 \
867 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store( \
868 struct config_item *item, const char *page, size_t count) \
869 { \
870 struct se_portal_group *se_tpg = attrib_to_tpg(item); \
871 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \
872 struct tcm_qla2xxx_tpg, se_tpg); \
873 struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib; \
874 unsigned long val; \
875 int ret; \
876 \
877 ret = kstrtoul(page, 0, &val); \
878 if (ret < 0) { \
879 pr_err("kstrtoul() failed with" \
880 " ret: %d\n", ret); \
881 return -EINVAL; \
882 } \
883 \
884 if ((val != 0) && (val != 1)) { \
885 pr_err("Illegal boolean value %lu\n", val); \
886 return -EINVAL; \
887 } \
888 \
889 a->name = val; \
890 \
891 return count; \
892 } \
893 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
894
895 DEF_QLA_TPG_ATTRIB(generate_node_acls);
896 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
897 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
898 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
899 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
900 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
901 DEF_QLA_TPG_ATTRIB(jam_host);
902 #endif
903
904 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
905 &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
906 &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
907 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
908 &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
909 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
910 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
911 &tcm_qla2xxx_tpg_attrib_attr_jam_host,
912 #endif
913 NULL,
914 };
915
916 /* End items for tcm_qla2xxx_tpg_attrib_cit */
917
tcm_qla2xxx_enable_tpg(struct se_portal_group * se_tpg,bool enable)918 static int tcm_qla2xxx_enable_tpg(struct se_portal_group *se_tpg,
919 bool enable)
920 {
921 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
922 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
923 struct tcm_qla2xxx_lport, lport_wwn);
924 struct scsi_qla_host *vha = lport->qla_vha;
925 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
926 struct tcm_qla2xxx_tpg, se_tpg);
927
928 if (enable) {
929 if (atomic_read(&tpg->lport_tpg_enabled))
930 return -EEXIST;
931
932 atomic_set(&tpg->lport_tpg_enabled, 1);
933 qlt_enable_vha(vha);
934 } else {
935 if (!atomic_read(&tpg->lport_tpg_enabled))
936 return 0;
937
938 atomic_set(&tpg->lport_tpg_enabled, 0);
939 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
940 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
941 }
942
943 return 0;
944 }
945
tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item * item,char * page)946 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
947 char *page)
948 {
949 return target_show_dynamic_sessions(to_tpg(item), page);
950 }
951
tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item * item,const char * page,size_t count)952 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
953 const char *page, size_t count)
954 {
955 struct se_portal_group *se_tpg = to_tpg(item);
956 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
957 struct tcm_qla2xxx_tpg, se_tpg);
958 unsigned long val;
959 int ret = kstrtoul(page, 0, &val);
960
961 if (ret) {
962 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
963 return ret;
964 }
965 if (val != 0 && val != 1 && val != 3) {
966 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
967 return -EINVAL;
968 }
969 tpg->tpg_attrib.fabric_prot_type = val;
970
971 return count;
972 }
973
tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item * item,char * page)974 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
975 char *page)
976 {
977 struct se_portal_group *se_tpg = to_tpg(item);
978 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
979 struct tcm_qla2xxx_tpg, se_tpg);
980
981 return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
982 }
983
984 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
985 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
986
987 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
988 &tcm_qla2xxx_tpg_attr_dynamic_sessions,
989 &tcm_qla2xxx_tpg_attr_fabric_prot_type,
990 NULL,
991 };
992
tcm_qla2xxx_make_tpg(struct se_wwn * wwn,const char * name)993 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
994 const char *name)
995 {
996 struct tcm_qla2xxx_lport *lport = container_of(wwn,
997 struct tcm_qla2xxx_lport, lport_wwn);
998 struct tcm_qla2xxx_tpg *tpg;
999 unsigned long tpgt;
1000 int ret;
1001
1002 if (strstr(name, "tpgt_") != name)
1003 return ERR_PTR(-EINVAL);
1004 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1005 return ERR_PTR(-EINVAL);
1006
1007 if ((tpgt != 1)) {
1008 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1009 return ERR_PTR(-ENOSYS);
1010 }
1011
1012 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1013 if (!tpg) {
1014 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1015 return ERR_PTR(-ENOMEM);
1016 }
1017 tpg->lport = lport;
1018 tpg->lport_tpgt = tpgt;
1019 /*
1020 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1021 * NodeACLs
1022 */
1023 tpg->tpg_attrib.generate_node_acls = 1;
1024 tpg->tpg_attrib.demo_mode_write_protect = 1;
1025 tpg->tpg_attrib.cache_dynamic_acls = 1;
1026 tpg->tpg_attrib.demo_mode_login_only = 1;
1027 tpg->tpg_attrib.jam_host = 0;
1028
1029 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1030 if (ret < 0) {
1031 kfree(tpg);
1032 return NULL;
1033 }
1034
1035 lport->tpg_1 = tpg;
1036
1037 return &tpg->se_tpg;
1038 }
1039
tcm_qla2xxx_drop_tpg(struct se_portal_group * se_tpg)1040 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1041 {
1042 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1043 struct tcm_qla2xxx_tpg, se_tpg);
1044 struct tcm_qla2xxx_lport *lport = tpg->lport;
1045 struct scsi_qla_host *vha = lport->qla_vha;
1046 /*
1047 * Call into qla2x_target.c LLD logic to shutdown the active
1048 * FC Nexuses and disable target mode operation for this qla_hw_data
1049 */
1050 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1051 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1052
1053 core_tpg_deregister(se_tpg);
1054 /*
1055 * Clear local TPG=1 pointer for non NPIV mode.
1056 */
1057 lport->tpg_1 = NULL;
1058 kfree(tpg);
1059 }
1060
tcm_qla2xxx_npiv_enable_tpg(struct se_portal_group * se_tpg,bool enable)1061 static int tcm_qla2xxx_npiv_enable_tpg(struct se_portal_group *se_tpg,
1062 bool enable)
1063 {
1064 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1065 struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1066 struct tcm_qla2xxx_lport, lport_wwn);
1067 struct scsi_qla_host *vha = lport->qla_vha;
1068 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1069 struct tcm_qla2xxx_tpg, se_tpg);
1070
1071 if (enable) {
1072 if (atomic_read(&tpg->lport_tpg_enabled))
1073 return -EEXIST;
1074
1075 atomic_set(&tpg->lport_tpg_enabled, 1);
1076 qlt_enable_vha(vha);
1077 } else {
1078 if (!atomic_read(&tpg->lport_tpg_enabled))
1079 return 0;
1080
1081 atomic_set(&tpg->lport_tpg_enabled, 0);
1082 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1083 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1084 }
1085
1086 return 0;
1087 }
1088
tcm_qla2xxx_npiv_make_tpg(struct se_wwn * wwn,const char * name)1089 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1090 const char *name)
1091 {
1092 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1093 struct tcm_qla2xxx_lport, lport_wwn);
1094 struct tcm_qla2xxx_tpg *tpg;
1095 unsigned long tpgt;
1096 int ret;
1097
1098 if (strstr(name, "tpgt_") != name)
1099 return ERR_PTR(-EINVAL);
1100 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1101 return ERR_PTR(-EINVAL);
1102
1103 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1104 if (!tpg) {
1105 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1106 return ERR_PTR(-ENOMEM);
1107 }
1108 tpg->lport = lport;
1109 tpg->lport_tpgt = tpgt;
1110
1111 /*
1112 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1113 * NodeACLs
1114 */
1115 tpg->tpg_attrib.generate_node_acls = 1;
1116 tpg->tpg_attrib.demo_mode_write_protect = 1;
1117 tpg->tpg_attrib.cache_dynamic_acls = 1;
1118 tpg->tpg_attrib.demo_mode_login_only = 1;
1119
1120 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1121 if (ret < 0) {
1122 kfree(tpg);
1123 return NULL;
1124 }
1125 lport->tpg_1 = tpg;
1126 return &tpg->se_tpg;
1127 }
1128
1129 /*
1130 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1131 */
tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t * vha,const be_id_t s_id)1132 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
1133 const be_id_t s_id)
1134 {
1135 struct tcm_qla2xxx_lport *lport;
1136 struct se_node_acl *se_nacl;
1137 struct tcm_qla2xxx_nacl *nacl;
1138 u32 key;
1139
1140 lport = vha->vha_tgt.target_lport_ptr;
1141 if (!lport) {
1142 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1143 dump_stack();
1144 return NULL;
1145 }
1146
1147 key = sid_to_key(s_id);
1148 pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1149
1150 se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1151 if (!se_nacl) {
1152 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1153 return NULL;
1154 }
1155 pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1156 se_nacl, se_nacl->initiatorname);
1157
1158 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1159 if (!nacl->fc_port) {
1160 pr_err("Unable to locate struct fc_port\n");
1161 return NULL;
1162 }
1163
1164 return nacl->fc_port;
1165 }
1166
1167 /*
1168 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1169 */
tcm_qla2xxx_set_sess_by_s_id(struct tcm_qla2xxx_lport * lport,struct se_node_acl * new_se_nacl,struct tcm_qla2xxx_nacl * nacl,struct se_session * se_sess,struct fc_port * fc_port,be_id_t s_id)1170 static void tcm_qla2xxx_set_sess_by_s_id(
1171 struct tcm_qla2xxx_lport *lport,
1172 struct se_node_acl *new_se_nacl,
1173 struct tcm_qla2xxx_nacl *nacl,
1174 struct se_session *se_sess,
1175 struct fc_port *fc_port,
1176 be_id_t s_id)
1177 {
1178 u32 key;
1179 void *slot;
1180 int rc;
1181
1182 key = sid_to_key(s_id);
1183 pr_debug("set_sess_by_s_id: %06x\n", key);
1184
1185 slot = btree_lookup32(&lport->lport_fcport_map, key);
1186 if (!slot) {
1187 if (new_se_nacl) {
1188 pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1189 nacl->nport_id = key;
1190 rc = btree_insert32(&lport->lport_fcport_map, key,
1191 new_se_nacl, GFP_ATOMIC);
1192 if (rc)
1193 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1194 (int)key);
1195 } else {
1196 pr_debug("Wiping nonexisting fc_port entry\n");
1197 }
1198
1199 fc_port->se_sess = se_sess;
1200 nacl->fc_port = fc_port;
1201 return;
1202 }
1203
1204 if (nacl->fc_port) {
1205 if (new_se_nacl == NULL) {
1206 pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1207 btree_remove32(&lport->lport_fcport_map, key);
1208 nacl->fc_port = NULL;
1209 return;
1210 }
1211 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1212 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1213 fc_port->se_sess = se_sess;
1214 nacl->fc_port = fc_port;
1215 return;
1216 }
1217
1218 if (new_se_nacl == NULL) {
1219 pr_debug("Clearing existing fc_port entry\n");
1220 btree_remove32(&lport->lport_fcport_map, key);
1221 return;
1222 }
1223
1224 pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1225 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1226 fc_port->se_sess = se_sess;
1227 nacl->fc_port = fc_port;
1228
1229 pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1230 nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1231 }
1232
1233 /*
1234 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1235 */
tcm_qla2xxx_find_sess_by_loop_id(scsi_qla_host_t * vha,const uint16_t loop_id)1236 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1237 scsi_qla_host_t *vha,
1238 const uint16_t loop_id)
1239 {
1240 struct tcm_qla2xxx_lport *lport;
1241 struct se_node_acl *se_nacl;
1242 struct tcm_qla2xxx_nacl *nacl;
1243 struct tcm_qla2xxx_fc_loopid *fc_loopid;
1244
1245 lport = vha->vha_tgt.target_lport_ptr;
1246 if (!lport) {
1247 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1248 dump_stack();
1249 return NULL;
1250 }
1251
1252 pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1253
1254 fc_loopid = lport->lport_loopid_map + loop_id;
1255 se_nacl = fc_loopid->se_nacl;
1256 if (!se_nacl) {
1257 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1258 loop_id);
1259 return NULL;
1260 }
1261
1262 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1263
1264 if (!nacl->fc_port) {
1265 pr_err("Unable to locate struct fc_port\n");
1266 return NULL;
1267 }
1268
1269 return nacl->fc_port;
1270 }
1271
1272 /*
1273 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1274 */
tcm_qla2xxx_set_sess_by_loop_id(struct tcm_qla2xxx_lport * lport,struct se_node_acl * new_se_nacl,struct tcm_qla2xxx_nacl * nacl,struct se_session * se_sess,struct fc_port * fc_port,uint16_t loop_id)1275 static void tcm_qla2xxx_set_sess_by_loop_id(
1276 struct tcm_qla2xxx_lport *lport,
1277 struct se_node_acl *new_se_nacl,
1278 struct tcm_qla2xxx_nacl *nacl,
1279 struct se_session *se_sess,
1280 struct fc_port *fc_port,
1281 uint16_t loop_id)
1282 {
1283 struct se_node_acl *saved_nacl;
1284 struct tcm_qla2xxx_fc_loopid *fc_loopid;
1285
1286 pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1287
1288 fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1289 lport->lport_loopid_map)[loop_id];
1290
1291 saved_nacl = fc_loopid->se_nacl;
1292 if (!saved_nacl) {
1293 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1294 fc_loopid->se_nacl = new_se_nacl;
1295 if (fc_port->se_sess != se_sess)
1296 fc_port->se_sess = se_sess;
1297 if (nacl->fc_port != fc_port)
1298 nacl->fc_port = fc_port;
1299 return;
1300 }
1301
1302 if (nacl->fc_port) {
1303 if (new_se_nacl == NULL) {
1304 pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1305 fc_loopid->se_nacl = NULL;
1306 nacl->fc_port = NULL;
1307 return;
1308 }
1309
1310 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1311 fc_loopid->se_nacl = new_se_nacl;
1312 if (fc_port->se_sess != se_sess)
1313 fc_port->se_sess = se_sess;
1314 if (nacl->fc_port != fc_port)
1315 nacl->fc_port = fc_port;
1316 return;
1317 }
1318
1319 if (new_se_nacl == NULL) {
1320 pr_debug("Clearing fc_loopid->se_nacl\n");
1321 fc_loopid->se_nacl = NULL;
1322 return;
1323 }
1324
1325 pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1326 fc_loopid->se_nacl = new_se_nacl;
1327 if (fc_port->se_sess != se_sess)
1328 fc_port->se_sess = se_sess;
1329 if (nacl->fc_port != fc_port)
1330 nacl->fc_port = fc_port;
1331
1332 pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1333 nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1334 }
1335
1336 /*
1337 * Should always be called with qla_hw_data->tgt.sess_lock held.
1338 */
tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport * lport,struct tcm_qla2xxx_nacl * nacl,struct fc_port * sess)1339 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1340 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1341 {
1342 struct se_session *se_sess = sess->se_sess;
1343
1344 tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1345 sess, port_id_to_be_id(sess->d_id));
1346 tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1347 sess, sess->loop_id);
1348 }
1349
tcm_qla2xxx_free_session(struct fc_port * sess)1350 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1351 {
1352 struct qla_tgt *tgt = sess->tgt;
1353 struct qla_hw_data *ha = tgt->ha;
1354 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1355 struct se_session *se_sess;
1356 struct tcm_qla2xxx_lport *lport;
1357
1358 se_sess = sess->se_sess;
1359 if (!se_sess) {
1360 pr_err("struct fc_port->se_sess is NULL\n");
1361 dump_stack();
1362 return;
1363 }
1364
1365 lport = vha->vha_tgt.target_lport_ptr;
1366 if (!lport) {
1367 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1368 dump_stack();
1369 return;
1370 }
1371 target_wait_for_sess_cmds(se_sess);
1372
1373 target_remove_session(se_sess);
1374 }
1375
tcm_qla2xxx_session_cb(struct se_portal_group * se_tpg,struct se_session * se_sess,void * p)1376 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1377 struct se_session *se_sess, void *p)
1378 {
1379 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1380 struct tcm_qla2xxx_tpg, se_tpg);
1381 struct tcm_qla2xxx_lport *lport = tpg->lport;
1382 struct qla_hw_data *ha = lport->qla_vha->hw;
1383 struct se_node_acl *se_nacl = se_sess->se_node_acl;
1384 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1385 struct tcm_qla2xxx_nacl, se_node_acl);
1386 struct fc_port *qlat_sess = p;
1387 uint16_t loop_id = qlat_sess->loop_id;
1388 unsigned long flags;
1389
1390 /*
1391 * And now setup se_nacl and session pointers into HW lport internal
1392 * mappings for fabric S_ID and LOOP_ID.
1393 */
1394 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1395 tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
1396 port_id_to_be_id(qlat_sess->d_id));
1397 tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1398 se_sess, qlat_sess, loop_id);
1399 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1400
1401 return 0;
1402 }
1403
1404 /*
1405 * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1406 * to locate struct se_node_acl
1407 */
tcm_qla2xxx_check_initiator_node_acl(scsi_qla_host_t * vha,unsigned char * fc_wwpn,struct fc_port * qlat_sess)1408 static int tcm_qla2xxx_check_initiator_node_acl(
1409 scsi_qla_host_t *vha,
1410 unsigned char *fc_wwpn,
1411 struct fc_port *qlat_sess)
1412 {
1413 struct qla_hw_data *ha = vha->hw;
1414 struct tcm_qla2xxx_lport *lport;
1415 struct tcm_qla2xxx_tpg *tpg;
1416 struct se_session *se_sess;
1417 unsigned char port_name[36];
1418 int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1419 TCM_QLA2XXX_DEFAULT_TAGS;
1420
1421 lport = vha->vha_tgt.target_lport_ptr;
1422 if (!lport) {
1423 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1424 dump_stack();
1425 return -EINVAL;
1426 }
1427 /*
1428 * Locate the TPG=1 reference..
1429 */
1430 tpg = lport->tpg_1;
1431 if (!tpg) {
1432 pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
1433 return -EINVAL;
1434 }
1435 /*
1436 * Format the FCP Initiator port_name into colon seperated values to
1437 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1438 */
1439 memset(&port_name, 0, 36);
1440 snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1441 /*
1442 * Locate our struct se_node_acl either from an explict NodeACL created
1443 * via ConfigFS, or via running in TPG demo mode.
1444 */
1445 se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1446 sizeof(struct qla_tgt_cmd),
1447 TARGET_PROT_ALL, port_name,
1448 qlat_sess, tcm_qla2xxx_session_cb);
1449 if (IS_ERR(se_sess))
1450 return PTR_ERR(se_sess);
1451
1452 return 0;
1453 }
1454
tcm_qla2xxx_update_sess(struct fc_port * sess,port_id_t s_id,uint16_t loop_id,bool conf_compl_supported)1455 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1456 uint16_t loop_id, bool conf_compl_supported)
1457 {
1458 struct qla_tgt *tgt = sess->tgt;
1459 struct qla_hw_data *ha = tgt->ha;
1460 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1461 struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1462 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1463 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1464 struct tcm_qla2xxx_nacl, se_node_acl);
1465 u32 key;
1466
1467
1468 if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1469 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1470 sess, sess->port_name,
1471 sess->loop_id, loop_id, sess->d_id.b.domain,
1472 sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1473 s_id.b.area, s_id.b.al_pa);
1474
1475 if (sess->loop_id != loop_id) {
1476 /*
1477 * Because we can shuffle loop IDs around and we
1478 * update different sessions non-atomically, we might
1479 * have overwritten this session's old loop ID
1480 * already, and we might end up overwriting some other
1481 * session that will be updated later. So we have to
1482 * be extra careful and we can't warn about those things...
1483 */
1484 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1485 lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1486
1487 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1488
1489 sess->loop_id = loop_id;
1490 }
1491
1492 if (sess->d_id.b24 != s_id.b24) {
1493 key = (((u32) sess->d_id.b.domain << 16) |
1494 ((u32) sess->d_id.b.area << 8) |
1495 ((u32) sess->d_id.b.al_pa));
1496
1497 if (btree_lookup32(&lport->lport_fcport_map, key))
1498 WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1499 se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1500 sess->d_id.b.domain, sess->d_id.b.area,
1501 sess->d_id.b.al_pa);
1502 else
1503 WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1504 sess->d_id.b.domain, sess->d_id.b.area,
1505 sess->d_id.b.al_pa);
1506
1507 key = (((u32) s_id.b.domain << 16) |
1508 ((u32) s_id.b.area << 8) |
1509 ((u32) s_id.b.al_pa));
1510
1511 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1512 WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1513 s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1514 btree_update32(&lport->lport_fcport_map, key, se_nacl);
1515 } else {
1516 btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1517 GFP_ATOMIC);
1518 }
1519
1520 sess->d_id = s_id;
1521 nacl->nport_id = key;
1522 }
1523
1524 sess->conf_compl_supported = conf_compl_supported;
1525
1526 }
1527
1528 /*
1529 * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1530 */
1531 static const struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1532 .find_cmd_by_tag = tcm_qla2xxx_find_cmd_by_tag,
1533 .handle_cmd = tcm_qla2xxx_handle_cmd,
1534 .handle_data = tcm_qla2xxx_handle_data,
1535 .handle_tmr = tcm_qla2xxx_handle_tmr,
1536 .get_cmd = tcm_qla2xxx_get_cmd,
1537 .rel_cmd = tcm_qla2xxx_rel_cmd,
1538 .free_cmd = tcm_qla2xxx_free_cmd,
1539 .free_mcmd = tcm_qla2xxx_free_mcmd,
1540 .free_session = tcm_qla2xxx_free_session,
1541 .update_sess = tcm_qla2xxx_update_sess,
1542 .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1543 .find_sess_by_s_id = tcm_qla2xxx_find_sess_by_s_id,
1544 .find_sess_by_loop_id = tcm_qla2xxx_find_sess_by_loop_id,
1545 .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1546 .put_sess = tcm_qla2xxx_put_sess,
1547 .shutdown_sess = tcm_qla2xxx_shutdown_sess,
1548 .get_dif_tags = tcm_qla2xxx_dif_tags,
1549 .chk_dif_tags = tcm_qla2xxx_chk_dif_tags,
1550 };
1551
tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport * lport)1552 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1553 {
1554 int rc;
1555
1556 rc = btree_init32(&lport->lport_fcport_map);
1557 if (rc) {
1558 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1559 return rc;
1560 }
1561
1562 lport->lport_loopid_map =
1563 vzalloc(array_size(65536,
1564 sizeof(struct tcm_qla2xxx_fc_loopid)));
1565 if (!lport->lport_loopid_map) {
1566 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1567 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1568 btree_destroy32(&lport->lport_fcport_map);
1569 return -ENOMEM;
1570 }
1571 pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1572 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1573 return 0;
1574 }
1575
tcm_qla2xxx_lport_register_cb(struct scsi_qla_host * vha,void * target_lport_ptr,u64 npiv_wwpn,u64 npiv_wwnn)1576 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1577 void *target_lport_ptr,
1578 u64 npiv_wwpn, u64 npiv_wwnn)
1579 {
1580 struct qla_hw_data *ha = vha->hw;
1581 struct tcm_qla2xxx_lport *lport =
1582 (struct tcm_qla2xxx_lport *)target_lport_ptr;
1583 /*
1584 * Setup tgt_ops, local pointer to vha and target_lport_ptr
1585 */
1586 ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1587 vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1588 lport->qla_vha = vha;
1589
1590 return 0;
1591 }
1592
tcm_qla2xxx_make_lport(struct target_fabric_configfs * tf,struct config_group * group,const char * name)1593 static struct se_wwn *tcm_qla2xxx_make_lport(
1594 struct target_fabric_configfs *tf,
1595 struct config_group *group,
1596 const char *name)
1597 {
1598 struct tcm_qla2xxx_lport *lport;
1599 u64 wwpn;
1600 int ret = -ENODEV;
1601
1602 if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1603 return ERR_PTR(-EINVAL);
1604
1605 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1606 if (!lport) {
1607 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1608 return ERR_PTR(-ENOMEM);
1609 }
1610 lport->lport_wwpn = wwpn;
1611 tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1612 wwpn);
1613 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1614
1615 ret = tcm_qla2xxx_init_lport(lport);
1616 if (ret != 0)
1617 goto out;
1618
1619 ret = qlt_lport_register(lport, wwpn, 0, 0,
1620 tcm_qla2xxx_lport_register_cb);
1621 if (ret != 0)
1622 goto out_lport;
1623
1624 return &lport->lport_wwn;
1625 out_lport:
1626 vfree(lport->lport_loopid_map);
1627 btree_destroy32(&lport->lport_fcport_map);
1628 out:
1629 kfree(lport);
1630 return ERR_PTR(ret);
1631 }
1632
tcm_qla2xxx_drop_lport(struct se_wwn * wwn)1633 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1634 {
1635 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1636 struct tcm_qla2xxx_lport, lport_wwn);
1637 struct scsi_qla_host *vha = lport->qla_vha;
1638 struct se_node_acl *node;
1639 u32 key = 0;
1640
1641 /*
1642 * Call into qla2x_target.c LLD logic to complete the
1643 * shutdown of struct qla_tgt after the call to
1644 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1645 */
1646 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1647 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1648
1649 qlt_lport_deregister(vha);
1650
1651 vfree(lport->lport_loopid_map);
1652 btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1653 btree_remove32(&lport->lport_fcport_map, key);
1654 btree_destroy32(&lport->lport_fcport_map);
1655 kfree(lport);
1656 }
1657
tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host * base_vha,void * target_lport_ptr,u64 npiv_wwpn,u64 npiv_wwnn)1658 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1659 void *target_lport_ptr,
1660 u64 npiv_wwpn, u64 npiv_wwnn)
1661 {
1662 struct fc_vport *vport;
1663 struct Scsi_Host *sh = base_vha->host;
1664 struct scsi_qla_host *npiv_vha;
1665 struct tcm_qla2xxx_lport *lport =
1666 (struct tcm_qla2xxx_lport *)target_lport_ptr;
1667 struct tcm_qla2xxx_lport *base_lport =
1668 (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1669 struct fc_vport_identifiers vport_id;
1670
1671 if (qla_ini_mode_enabled(base_vha)) {
1672 pr_err("qla2xxx base_vha not enabled for target mode\n");
1673 return -EPERM;
1674 }
1675
1676 if (!base_lport || !base_lport->tpg_1 ||
1677 !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1678 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1679 return -EPERM;
1680 }
1681
1682 memset(&vport_id, 0, sizeof(vport_id));
1683 vport_id.port_name = npiv_wwpn;
1684 vport_id.node_name = npiv_wwnn;
1685 vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1686 vport_id.vport_type = FC_PORTTYPE_NPIV;
1687 vport_id.disable = false;
1688
1689 vport = fc_vport_create(sh, 0, &vport_id);
1690 if (!vport) {
1691 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1692 return -ENODEV;
1693 }
1694 /*
1695 * Setup local pointer to NPIV vhba + target_lport_ptr
1696 */
1697 npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1698 npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1699 lport->qla_vha = npiv_vha;
1700 scsi_host_get(npiv_vha->host);
1701 return 0;
1702 }
1703
1704
tcm_qla2xxx_npiv_make_lport(struct target_fabric_configfs * tf,struct config_group * group,const char * name)1705 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1706 struct target_fabric_configfs *tf,
1707 struct config_group *group,
1708 const char *name)
1709 {
1710 struct tcm_qla2xxx_lport *lport;
1711 u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1712 char *p, tmp[128];
1713 int ret;
1714
1715 snprintf(tmp, 128, "%s", name);
1716
1717 p = strchr(tmp, '@');
1718 if (!p) {
1719 pr_err("Unable to locate NPIV '@' separator\n");
1720 return ERR_PTR(-EINVAL);
1721 }
1722 *p++ = '\0';
1723
1724 if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1725 return ERR_PTR(-EINVAL);
1726
1727 if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1728 &npiv_wwpn, &npiv_wwnn) < 0)
1729 return ERR_PTR(-EINVAL);
1730
1731 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1732 if (!lport) {
1733 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1734 return ERR_PTR(-ENOMEM);
1735 }
1736 lport->lport_npiv_wwpn = npiv_wwpn;
1737 lport->lport_npiv_wwnn = npiv_wwnn;
1738 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1739
1740 ret = tcm_qla2xxx_init_lport(lport);
1741 if (ret != 0)
1742 goto out;
1743
1744 ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1745 tcm_qla2xxx_lport_register_npiv_cb);
1746 if (ret != 0)
1747 goto out_lport;
1748
1749 return &lport->lport_wwn;
1750 out_lport:
1751 vfree(lport->lport_loopid_map);
1752 btree_destroy32(&lport->lport_fcport_map);
1753 out:
1754 kfree(lport);
1755 return ERR_PTR(ret);
1756 }
1757
tcm_qla2xxx_npiv_drop_lport(struct se_wwn * wwn)1758 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1759 {
1760 struct tcm_qla2xxx_lport *lport = container_of(wwn,
1761 struct tcm_qla2xxx_lport, lport_wwn);
1762 struct scsi_qla_host *npiv_vha = lport->qla_vha;
1763 struct qla_hw_data *ha = npiv_vha->hw;
1764 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1765
1766 scsi_host_put(npiv_vha->host);
1767 /*
1768 * Notify libfc that we want to release the vha->fc_vport
1769 */
1770 fc_vport_terminate(npiv_vha->fc_vport);
1771 scsi_host_put(base_vha->host);
1772 kfree(lport);
1773 }
1774
1775
tcm_qla2xxx_wwn_version_show(struct config_item * item,char * page)1776 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1777 char *page)
1778 {
1779 return sprintf(page,
1780 "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1781 QLA2XXX_VERSION, utsname()->sysname,
1782 utsname()->machine, utsname()->release);
1783 }
1784
1785 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1786
1787 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1788 &tcm_qla2xxx_wwn_attr_version,
1789 NULL,
1790 };
1791
1792 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1793 .module = THIS_MODULE,
1794 .fabric_name = "qla2xxx",
1795 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl),
1796 /*
1797 * XXX: Limit assumes single page per scatter-gather-list entry.
1798 * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1799 */
1800 .max_data_sg_nents = 1200,
1801 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
1802 .tpg_get_tag = tcm_qla2xxx_get_tag,
1803 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode,
1804 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache,
1805 .tpg_check_demo_mode_write_protect =
1806 tcm_qla2xxx_check_demo_write_protect,
1807 .tpg_check_prod_mode_write_protect =
1808 tcm_qla2xxx_check_prod_write_protect,
1809 .tpg_check_prot_fabric_only = tcm_qla2xxx_check_prot_fabric_only,
1810 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1811 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
1812 .check_stop_free = tcm_qla2xxx_check_stop_free,
1813 .release_cmd = tcm_qla2xxx_release_cmd,
1814 .close_session = tcm_qla2xxx_close_session,
1815 .sess_get_index = tcm_qla2xxx_sess_get_index,
1816 .sess_get_initiator_sid = NULL,
1817 .write_pending = tcm_qla2xxx_write_pending,
1818 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
1819 .get_cmd_state = tcm_qla2xxx_get_cmd_state,
1820 .queue_data_in = tcm_qla2xxx_queue_data_in,
1821 .queue_status = tcm_qla2xxx_queue_status,
1822 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
1823 .aborted_task = tcm_qla2xxx_aborted_task,
1824 /*
1825 * Setup function pointers for generic logic in
1826 * target_core_fabric_configfs.c
1827 */
1828 .fabric_make_wwn = tcm_qla2xxx_make_lport,
1829 .fabric_drop_wwn = tcm_qla2xxx_drop_lport,
1830 .fabric_make_tpg = tcm_qla2xxx_make_tpg,
1831 .fabric_enable_tpg = tcm_qla2xxx_enable_tpg,
1832 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
1833 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl,
1834
1835 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
1836 .tfc_tpg_base_attrs = tcm_qla2xxx_tpg_attrs,
1837 .tfc_tpg_attrib_attrs = tcm_qla2xxx_tpg_attrib_attrs,
1838 };
1839
1840 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1841 .module = THIS_MODULE,
1842 .fabric_name = "qla2xxx_npiv",
1843 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl),
1844 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
1845 .tpg_get_tag = tcm_qla2xxx_get_tag,
1846 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode,
1847 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache,
1848 .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1849 .tpg_check_prod_mode_write_protect =
1850 tcm_qla2xxx_check_prod_write_protect,
1851 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1852 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
1853 .check_stop_free = tcm_qla2xxx_check_stop_free,
1854 .release_cmd = tcm_qla2xxx_release_cmd,
1855 .close_session = tcm_qla2xxx_close_session,
1856 .sess_get_index = tcm_qla2xxx_sess_get_index,
1857 .sess_get_initiator_sid = NULL,
1858 .write_pending = tcm_qla2xxx_write_pending,
1859 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs,
1860 .get_cmd_state = tcm_qla2xxx_get_cmd_state,
1861 .queue_data_in = tcm_qla2xxx_queue_data_in,
1862 .queue_status = tcm_qla2xxx_queue_status,
1863 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp,
1864 .aborted_task = tcm_qla2xxx_aborted_task,
1865 /*
1866 * Setup function pointers for generic logic in
1867 * target_core_fabric_configfs.c
1868 */
1869 .fabric_make_wwn = tcm_qla2xxx_npiv_make_lport,
1870 .fabric_drop_wwn = tcm_qla2xxx_npiv_drop_lport,
1871 .fabric_make_tpg = tcm_qla2xxx_npiv_make_tpg,
1872 .fabric_enable_tpg = tcm_qla2xxx_npiv_enable_tpg,
1873 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg,
1874 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl,
1875
1876 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
1877 };
1878
tcm_qla2xxx_register_configfs(void)1879 static int tcm_qla2xxx_register_configfs(void)
1880 {
1881 int ret;
1882
1883 pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1884 QLA2XXX_VERSION, utsname()->sysname,
1885 utsname()->machine, utsname()->release);
1886
1887 ret = target_register_template(&tcm_qla2xxx_ops);
1888 if (ret)
1889 return ret;
1890
1891 ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1892 if (ret)
1893 goto out_fabric;
1894
1895 tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1896 WQ_MEM_RECLAIM, 0);
1897 if (!tcm_qla2xxx_free_wq) {
1898 ret = -ENOMEM;
1899 goto out_fabric_npiv;
1900 }
1901
1902 return 0;
1903
1904 out_fabric_npiv:
1905 target_unregister_template(&tcm_qla2xxx_npiv_ops);
1906 out_fabric:
1907 target_unregister_template(&tcm_qla2xxx_ops);
1908 return ret;
1909 }
1910
tcm_qla2xxx_deregister_configfs(void)1911 static void tcm_qla2xxx_deregister_configfs(void)
1912 {
1913 destroy_workqueue(tcm_qla2xxx_free_wq);
1914
1915 target_unregister_template(&tcm_qla2xxx_ops);
1916 target_unregister_template(&tcm_qla2xxx_npiv_ops);
1917 }
1918
tcm_qla2xxx_init(void)1919 static int __init tcm_qla2xxx_init(void)
1920 {
1921 int ret;
1922
1923 BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
1924 BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
1925 BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
1926 BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
1927 BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
1928 BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
1929 BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
1930 BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
1931 BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
1932 BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
1933 BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
1934 BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
1935 BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
1936 BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);
1937
1938 ret = tcm_qla2xxx_register_configfs();
1939 if (ret < 0)
1940 return ret;
1941
1942 return 0;
1943 }
1944
tcm_qla2xxx_exit(void)1945 static void __exit tcm_qla2xxx_exit(void)
1946 {
1947 tcm_qla2xxx_deregister_configfs();
1948 }
1949
1950 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1951 MODULE_LICENSE("GPL");
1952 module_init(tcm_qla2xxx_init);
1953 module_exit(tcm_qla2xxx_exit);
1954