target: Add counters for ABORT_TASK success + failure
[sfrench/cifs-2.6.git] / drivers / scsi / qla2xxx / tcm_qla2xxx.c
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->trc_flags & TRC_CMD_FREE);
286
287         cmd->vha->tgt_counters.qla_core_ret_sta_ctio++;
288         cmd->trc_flags |= TRC_CMD_FREE;
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         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
303         cmd->trc_flags |= TRC_CMD_DONE;
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->trc_flags |= TRC_CMD_CHK_STOP;
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 void tcm_qla2xxx_release_session(struct kref *kref)
343 {
344         struct fc_port  *sess = container_of(kref,
345             struct fc_port, sess_kref);
346
347         qlt_unreg_sess(sess);
348 }
349
350 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
351 {
352         if (!sess)
353                 return;
354
355         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
356         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
357 }
358
359 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
360 {
361         struct fc_port *sess = se_sess->fabric_sess_ptr;
362         struct scsi_qla_host *vha;
363         unsigned long flags;
364
365         BUG_ON(!sess);
366         vha = sess->vha;
367
368         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
369         target_sess_cmd_list_set_waiting(se_sess);
370         tcm_qla2xxx_put_sess(sess);
371         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
372 }
373
374 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
375 {
376         return 0;
377 }
378
379 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
380 {
381         struct qla_tgt_cmd *cmd = container_of(se_cmd,
382                                 struct qla_tgt_cmd, se_cmd);
383
384         if (cmd->aborted) {
385                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
386                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
387                  * already kick start the free.
388                  */
389                 pr_debug("write_pending aborted cmd[%p] refcount %d "
390                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
391                         cmd,cmd->se_cmd.cmd_kref.refcount.counter,
392                         cmd->se_cmd.transport_state,
393                         cmd->se_cmd.t_state,
394                         cmd->se_cmd.se_cmd_flags);
395                 return 0;
396         }
397         cmd->trc_flags |= TRC_XFR_RDY;
398         cmd->bufflen = se_cmd->data_length;
399         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
400
401         cmd->sg_cnt = se_cmd->t_data_nents;
402         cmd->sg = se_cmd->t_data_sg;
403
404         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
405         cmd->prot_sg = se_cmd->t_prot_sg;
406         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
407         se_cmd->pi_err = 0;
408
409         /*
410          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
411          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
412          */
413         return qlt_rdy_to_xfer(cmd);
414 }
415
416 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
417 {
418         unsigned long flags;
419         /*
420          * Check for WRITE_PENDING status to determine if we need to wait for
421          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
422          */
423         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
424         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
425             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
426                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
427                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
428                                                 50);
429                 return 0;
430         }
431         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
432
433         return 0;
434 }
435
436 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
437 {
438         return;
439 }
440
441 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
442 {
443         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
444                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
445                                 struct qla_tgt_cmd, se_cmd);
446                 return cmd->state;
447         }
448
449         return 0;
450 }
451
452 /*
453  * Called from process context in qla_target.c:qlt_do_work() code
454  */
455 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
456         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
457         int data_dir, int bidi)
458 {
459         struct se_cmd *se_cmd = &cmd->se_cmd;
460         struct se_session *se_sess;
461         struct fc_port *sess;
462 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
463         struct se_portal_group *se_tpg;
464         struct tcm_qla2xxx_tpg *tpg;
465 #endif
466         int flags = TARGET_SCF_ACK_KREF;
467
468         if (bidi)
469                 flags |= TARGET_SCF_BIDI_OP;
470
471         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
472                 flags |= TARGET_SCF_USE_CPUID;
473
474         sess = cmd->sess;
475         if (!sess) {
476                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
477                 return -EINVAL;
478         }
479
480         se_sess = sess->se_sess;
481         if (!se_sess) {
482                 pr_err("Unable to locate active struct se_session\n");
483                 return -EINVAL;
484         }
485
486 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
487         se_tpg = se_sess->se_tpg;
488         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
489         if (unlikely(tpg->tpg_attrib.jam_host)) {
490                 /* return, and dont run target_submit_cmd,discarding command */
491                 return 0;
492         }
493 #endif
494
495         cmd->vha->tgt_counters.qla_core_sbt_cmd++;
496         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
497                                 cmd->unpacked_lun, data_length, fcp_task_attr,
498                                 data_dir, flags);
499 }
500
501 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
502 {
503         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
504         unsigned long flags;
505
506         /*
507          * Ensure that the complete FCP WRITE payload has been received.
508          * Otherwise return an exception via CHECK_CONDITION status.
509          */
510         cmd->cmd_in_wq = 0;
511
512         spin_lock_irqsave(&cmd->cmd_lock, flags);
513         cmd->data_work = 1;
514         if (cmd->aborted) {
515                 cmd->data_work_free = 1;
516                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
517
518                 tcm_qla2xxx_free_cmd(cmd);
519                 return;
520         }
521         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
522
523         cmd->vha->tgt_counters.qla_core_ret_ctio++;
524         if (!cmd->write_data_transferred) {
525                 /*
526                  * Check if se_cmd has already been aborted via LUN_RESET, and
527                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
528                  */
529                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
530                         complete(&cmd->se_cmd.t_transport_stop_comp);
531                         return;
532                 }
533
534                 if (cmd->se_cmd.pi_err)
535                         transport_generic_request_failure(&cmd->se_cmd,
536                                 cmd->se_cmd.pi_err);
537                 else
538                         transport_generic_request_failure(&cmd->se_cmd,
539                                 TCM_CHECK_CONDITION_ABORT_CMD);
540
541                 return;
542         }
543
544         return target_execute_cmd(&cmd->se_cmd);
545 }
546
547 /*
548  * Called from qla_target.c:qlt_do_ctio_completion()
549  */
550 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
551 {
552         cmd->trc_flags |= TRC_DATA_IN;
553         cmd->cmd_in_wq = 1;
554         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
555         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
556 }
557
558 static void tcm_qla2xxx_handle_dif_work(struct work_struct *work)
559 {
560         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
561
562         /* take an extra kref to prevent cmd free too early.
563          * need to wait for SCSI status/check condition to
564          * finish responding generate by transport_generic_request_failure.
565          */
566         kref_get(&cmd->se_cmd.cmd_kref);
567         transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err);
568 }
569
570 /*
571  * Called from qla_target.c:qlt_do_ctio_completion()
572  */
573 static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd)
574 {
575         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work);
576         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
577 }
578
579 /*
580  * Called from qla_target.c:qlt_issue_task_mgmt()
581  */
582 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
583         uint16_t tmr_func, uint32_t tag)
584 {
585         struct fc_port *sess = mcmd->sess;
586         struct se_cmd *se_cmd = &mcmd->se_cmd;
587         int transl_tmr_func = 0;
588
589         switch (tmr_func) {
590         case QLA_TGT_ABTS:
591                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
592                 transl_tmr_func = TMR_ABORT_TASK;
593                 break;
594         case QLA_TGT_2G_ABORT_TASK:
595                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
596                 transl_tmr_func = TMR_ABORT_TASK;
597                 break;
598         case QLA_TGT_CLEAR_ACA:
599                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
600                 transl_tmr_func = TMR_CLEAR_ACA;
601                 break;
602         case QLA_TGT_TARGET_RESET:
603                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
604                 transl_tmr_func = TMR_TARGET_WARM_RESET;
605                 break;
606         case QLA_TGT_LUN_RESET:
607                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
608                 transl_tmr_func = TMR_LUN_RESET;
609                 break;
610         case QLA_TGT_CLEAR_TS:
611                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
612                 transl_tmr_func = TMR_CLEAR_TASK_SET;
613                 break;
614         case QLA_TGT_ABORT_TS:
615                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
616                 transl_tmr_func = TMR_ABORT_TASK_SET;
617                 break;
618         default:
619                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
620                     sess->vha->host_no, tmr_func);
621                 return -ENOSYS;
622         }
623
624         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
625             transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
626 }
627
628 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
629 {
630         struct qla_tgt_cmd *cmd = container_of(se_cmd,
631                                 struct qla_tgt_cmd, se_cmd);
632
633         if (cmd->aborted) {
634                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
635                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
636                  * already kick start the free.
637                  */
638                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
639                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
640                         cmd,cmd->se_cmd.cmd_kref.refcount.counter,
641                         cmd->se_cmd.transport_state,
642                         cmd->se_cmd.t_state,
643                         cmd->se_cmd.se_cmd_flags);
644                 return 0;
645         }
646
647         cmd->trc_flags |= TRC_XMIT_DATA;
648         cmd->bufflen = se_cmd->data_length;
649         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
650
651         cmd->sg_cnt = se_cmd->t_data_nents;
652         cmd->sg = se_cmd->t_data_sg;
653         cmd->offset = 0;
654
655         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
656         cmd->prot_sg = se_cmd->t_prot_sg;
657         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
658         se_cmd->pi_err = 0;
659
660         /*
661          * Now queue completed DATA_IN the qla2xxx LLD and response ring
662          */
663         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
664                                 se_cmd->scsi_status);
665 }
666
667 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
668 {
669         struct qla_tgt_cmd *cmd = container_of(se_cmd,
670                                 struct qla_tgt_cmd, se_cmd);
671         int xmit_type = QLA_TGT_XMIT_STATUS;
672
673         cmd->bufflen = se_cmd->data_length;
674         cmd->sg = NULL;
675         cmd->sg_cnt = 0;
676         cmd->offset = 0;
677         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
678         if (cmd->trc_flags & TRC_XMIT_STATUS) {
679                 pr_crit("Multiple calls for status = %p.\n", cmd);
680                 dump_stack();
681         }
682         cmd->trc_flags |= TRC_XMIT_STATUS;
683
684         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
685                 /*
686                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
687                  * for qla_tgt_xmit_response LLD code
688                  */
689                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
690                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
691                         se_cmd->residual_count = 0;
692                 }
693                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
694                 se_cmd->residual_count += se_cmd->data_length;
695
696                 cmd->bufflen = 0;
697         }
698         /*
699          * Now queue status response to qla2xxx LLD code and response ring
700          */
701         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
702 }
703
704 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
705 {
706         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
707         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
708                                 struct qla_tgt_mgmt_cmd, se_cmd);
709
710         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
711                         mcmd, se_tmr->function, se_tmr->response);
712         /*
713          * Do translation between TCM TM response codes and
714          * QLA2xxx FC TM response codes.
715          */
716         switch (se_tmr->response) {
717         case TMR_FUNCTION_COMPLETE:
718                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
719                 break;
720         case TMR_TASK_DOES_NOT_EXIST:
721                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
722                 break;
723         case TMR_FUNCTION_REJECTED:
724                 mcmd->fc_tm_rsp = FC_TM_REJECT;
725                 break;
726         case TMR_LUN_DOES_NOT_EXIST:
727         default:
728                 mcmd->fc_tm_rsp = FC_TM_FAILED;
729                 break;
730         }
731         /*
732          * Queue the TM response to QLA2xxx LLD to build a
733          * CTIO response packet.
734          */
735         qlt_xmit_tm_rsp(mcmd);
736 }
737
738 #define DATA_WORK_NOT_FREE(_cmd) (_cmd->data_work && !_cmd->data_work_free)
739 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
740 {
741         struct qla_tgt_cmd *cmd = container_of(se_cmd,
742                                 struct qla_tgt_cmd, se_cmd);
743         unsigned long flags;
744
745         if (qlt_abort_cmd(cmd))
746                 return;
747
748         spin_lock_irqsave(&cmd->cmd_lock, flags);
749         if ((cmd->state == QLA_TGT_STATE_NEW)||
750             ((cmd->state == QLA_TGT_STATE_DATA_IN) &&
751                 DATA_WORK_NOT_FREE(cmd))) {
752                 cmd->data_work_free = 1;
753                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
754                 /*
755                  * cmd has not reached fw, Use this trigger to free it.
756                  */
757                 tcm_qla2xxx_free_cmd(cmd);
758                 return;
759         }
760         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
761         return;
762
763 }
764
765 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
766                         struct tcm_qla2xxx_nacl *, struct fc_port *);
767 /*
768  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
769  */
770 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
771 {
772         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
773         struct se_portal_group *se_tpg = se_nacl->se_tpg;
774         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
775         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
776                                 struct tcm_qla2xxx_lport, lport_wwn);
777         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
778                                 struct tcm_qla2xxx_nacl, se_node_acl);
779         void *node;
780
781         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
782
783         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
784         if (WARN_ON(node && (node != se_nacl))) {
785                 /*
786                  * The nacl no longer matches what we think it should be.
787                  * Most likely a new dynamic acl has been added while
788                  * someone dropped the hardware lock.  It clearly is a
789                  * bug elsewhere, but this bit can't make things worse.
790                  */
791                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
792                                node, GFP_ATOMIC);
793         }
794
795         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
796             se_nacl, nacl->nport_wwnn, nacl->nport_id);
797         /*
798          * Now clear the se_nacl and session pointers from our HW lport lookup
799          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
800          *
801          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
802          * target_wait_for_sess_cmds() before the session waits for outstanding
803          * I/O to complete, to avoid a race between session shutdown execution
804          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
805          */
806         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
807 }
808
809 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
810 {
811         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
812         target_sess_cmd_list_set_waiting(sess->se_sess);
813 }
814
815 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
816                 const char *name)
817 {
818         struct tcm_qla2xxx_nacl *nacl =
819                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
820         u64 wwnn;
821
822         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
823                 return -EINVAL;
824
825         nacl->nport_wwnn = wwnn;
826         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
827
828         return 0;
829 }
830
831 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
832
833 #define DEF_QLA_TPG_ATTRIB(name)                                        \
834                                                                         \
835 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
836                 struct config_item *item, char *page)                   \
837 {                                                                       \
838         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
839         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
840                         struct tcm_qla2xxx_tpg, se_tpg);                \
841                                                                         \
842         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
843 }                                                                       \
844                                                                         \
845 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
846                 struct config_item *item, const char *page, size_t count) \
847 {                                                                       \
848         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
849         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
850                         struct tcm_qla2xxx_tpg, se_tpg);                \
851         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
852         unsigned long val;                                              \
853         int ret;                                                        \
854                                                                         \
855         ret = kstrtoul(page, 0, &val);                                  \
856         if (ret < 0) {                                                  \
857                 pr_err("kstrtoul() failed with"                         \
858                                 " ret: %d\n", ret);                     \
859                 return -EINVAL;                                         \
860         }                                                               \
861                                                                         \
862         if ((val != 0) && (val != 1)) {                                 \
863                 pr_err("Illegal boolean value %lu\n", val);             \
864                 return -EINVAL;                                         \
865         }                                                               \
866                                                                         \
867         a->name = val;                                                  \
868                                                                         \
869         return count;                                                   \
870 }                                                                       \
871 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
872
873 DEF_QLA_TPG_ATTRIB(generate_node_acls);
874 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
875 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
876 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
877 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
878 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
879 DEF_QLA_TPG_ATTRIB(jam_host);
880 #endif
881
882 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
883         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
884         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
885         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
886         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
887         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
888 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
889         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
890 #endif
891         NULL,
892 };
893
894 /* End items for tcm_qla2xxx_tpg_attrib_cit */
895
896 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
897                 char *page)
898 {
899         struct se_portal_group *se_tpg = to_tpg(item);
900         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
901                         struct tcm_qla2xxx_tpg, se_tpg);
902
903         return snprintf(page, PAGE_SIZE, "%d\n",
904                         atomic_read(&tpg->lport_tpg_enabled));
905 }
906
907 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
908 {
909         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
910                                 struct tcm_qla2xxx_tpg, tpg_base_work);
911         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
912         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
913
914         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
915                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
916                 qlt_enable_vha(base_vha);
917         }
918         complete(&base_tpg->tpg_base_comp);
919 }
920
921 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
922 {
923         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
924                                 struct tcm_qla2xxx_tpg, tpg_base_work);
925         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
926         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
927
928         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
929                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
930                 target_undepend_item(&se_tpg->tpg_group.cg_item);
931         }
932         complete(&base_tpg->tpg_base_comp);
933 }
934
935 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
936                 const char *page, size_t count)
937 {
938         struct se_portal_group *se_tpg = to_tpg(item);
939         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
940                         struct tcm_qla2xxx_tpg, se_tpg);
941         unsigned long op;
942         int rc;
943
944         rc = kstrtoul(page, 0, &op);
945         if (rc < 0) {
946                 pr_err("kstrtoul() returned %d\n", rc);
947                 return -EINVAL;
948         }
949         if ((op != 1) && (op != 0)) {
950                 pr_err("Illegal value for tpg_enable: %lu\n", op);
951                 return -EINVAL;
952         }
953         if (op) {
954                 if (atomic_read(&tpg->lport_tpg_enabled))
955                         return -EEXIST;
956
957                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
958         } else {
959                 if (!atomic_read(&tpg->lport_tpg_enabled))
960                         return count;
961
962                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
963         }
964         init_completion(&tpg->tpg_base_comp);
965         schedule_work(&tpg->tpg_base_work);
966         wait_for_completion(&tpg->tpg_base_comp);
967
968         if (op) {
969                 if (!atomic_read(&tpg->lport_tpg_enabled))
970                         return -ENODEV;
971         } else {
972                 if (atomic_read(&tpg->lport_tpg_enabled))
973                         return -EPERM;
974         }
975         return count;
976 }
977
978 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
979                 char *page)
980 {
981         return target_show_dynamic_sessions(to_tpg(item), page);
982 }
983
984 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
985                 const char *page, size_t count)
986 {
987         struct se_portal_group *se_tpg = to_tpg(item);
988         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
989                                 struct tcm_qla2xxx_tpg, se_tpg);
990         unsigned long val;
991         int ret = kstrtoul(page, 0, &val);
992
993         if (ret) {
994                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
995                 return ret;
996         }
997         if (val != 0 && val != 1 && val != 3) {
998                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
999                 return -EINVAL;
1000         }
1001         tpg->tpg_attrib.fabric_prot_type = val;
1002
1003         return count;
1004 }
1005
1006 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
1007                 char *page)
1008 {
1009         struct se_portal_group *se_tpg = to_tpg(item);
1010         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1011                                 struct tcm_qla2xxx_tpg, se_tpg);
1012
1013         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1014 }
1015
1016 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1017 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1018 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1019
1020 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1021         &tcm_qla2xxx_tpg_attr_enable,
1022         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1023         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1024         NULL,
1025 };
1026
1027 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1028         struct se_wwn *wwn,
1029         struct config_group *group,
1030         const char *name)
1031 {
1032         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1033                         struct tcm_qla2xxx_lport, lport_wwn);
1034         struct tcm_qla2xxx_tpg *tpg;
1035         unsigned long tpgt;
1036         int ret;
1037
1038         if (strstr(name, "tpgt_") != name)
1039                 return ERR_PTR(-EINVAL);
1040         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1041                 return ERR_PTR(-EINVAL);
1042
1043         if ((tpgt != 1)) {
1044                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1045                 return ERR_PTR(-ENOSYS);
1046         }
1047
1048         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1049         if (!tpg) {
1050                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1051                 return ERR_PTR(-ENOMEM);
1052         }
1053         tpg->lport = lport;
1054         tpg->lport_tpgt = tpgt;
1055         /*
1056          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1057          * NodeACLs
1058          */
1059         tpg->tpg_attrib.generate_node_acls = 1;
1060         tpg->tpg_attrib.demo_mode_write_protect = 1;
1061         tpg->tpg_attrib.cache_dynamic_acls = 1;
1062         tpg->tpg_attrib.demo_mode_login_only = 1;
1063         tpg->tpg_attrib.jam_host = 0;
1064
1065         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1066         if (ret < 0) {
1067                 kfree(tpg);
1068                 return NULL;
1069         }
1070
1071         lport->tpg_1 = tpg;
1072
1073         return &tpg->se_tpg;
1074 }
1075
1076 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1077 {
1078         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1079                         struct tcm_qla2xxx_tpg, se_tpg);
1080         struct tcm_qla2xxx_lport *lport = tpg->lport;
1081         struct scsi_qla_host *vha = lport->qla_vha;
1082         /*
1083          * Call into qla2x_target.c LLD logic to shutdown the active
1084          * FC Nexuses and disable target mode operation for this qla_hw_data
1085          */
1086         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1087                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1088
1089         core_tpg_deregister(se_tpg);
1090         /*
1091          * Clear local TPG=1 pointer for non NPIV mode.
1092          */
1093         lport->tpg_1 = NULL;
1094         kfree(tpg);
1095 }
1096
1097 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1098                 char *page)
1099 {
1100         return tcm_qla2xxx_tpg_enable_show(item, page);
1101 }
1102
1103 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1104                 const char *page, size_t count)
1105 {
1106         struct se_portal_group *se_tpg = to_tpg(item);
1107         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1108         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1109                         struct tcm_qla2xxx_lport, lport_wwn);
1110         struct scsi_qla_host *vha = lport->qla_vha;
1111         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1112                         struct tcm_qla2xxx_tpg, se_tpg);
1113         unsigned long op;
1114         int rc;
1115
1116         rc = kstrtoul(page, 0, &op);
1117         if (rc < 0) {
1118                 pr_err("kstrtoul() returned %d\n", rc);
1119                 return -EINVAL;
1120         }
1121         if ((op != 1) && (op != 0)) {
1122                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1123                 return -EINVAL;
1124         }
1125         if (op) {
1126                 if (atomic_read(&tpg->lport_tpg_enabled))
1127                         return -EEXIST;
1128
1129                 atomic_set(&tpg->lport_tpg_enabled, 1);
1130                 qlt_enable_vha(vha);
1131         } else {
1132                 if (!atomic_read(&tpg->lport_tpg_enabled))
1133                         return count;
1134
1135                 atomic_set(&tpg->lport_tpg_enabled, 0);
1136                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1137         }
1138
1139         return count;
1140 }
1141
1142 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1143
1144 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1145         &tcm_qla2xxx_npiv_tpg_attr_enable,
1146         NULL,
1147 };
1148
1149 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1150         struct se_wwn *wwn,
1151         struct config_group *group,
1152         const char *name)
1153 {
1154         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1155                         struct tcm_qla2xxx_lport, lport_wwn);
1156         struct tcm_qla2xxx_tpg *tpg;
1157         unsigned long tpgt;
1158         int ret;
1159
1160         if (strstr(name, "tpgt_") != name)
1161                 return ERR_PTR(-EINVAL);
1162         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1163                 return ERR_PTR(-EINVAL);
1164
1165         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1166         if (!tpg) {
1167                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1168                 return ERR_PTR(-ENOMEM);
1169         }
1170         tpg->lport = lport;
1171         tpg->lport_tpgt = tpgt;
1172
1173         /*
1174          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1175          * NodeACLs
1176          */
1177         tpg->tpg_attrib.generate_node_acls = 1;
1178         tpg->tpg_attrib.demo_mode_write_protect = 1;
1179         tpg->tpg_attrib.cache_dynamic_acls = 1;
1180         tpg->tpg_attrib.demo_mode_login_only = 1;
1181
1182         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1183         if (ret < 0) {
1184                 kfree(tpg);
1185                 return NULL;
1186         }
1187         lport->tpg_1 = tpg;
1188         return &tpg->se_tpg;
1189 }
1190
1191 /*
1192  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1193  */
1194 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1195         scsi_qla_host_t *vha,
1196         const uint8_t *s_id)
1197 {
1198         struct tcm_qla2xxx_lport *lport;
1199         struct se_node_acl *se_nacl;
1200         struct tcm_qla2xxx_nacl *nacl;
1201         u32 key;
1202
1203         lport = vha->vha_tgt.target_lport_ptr;
1204         if (!lport) {
1205                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1206                 dump_stack();
1207                 return NULL;
1208         }
1209
1210         key = sid_to_key(s_id);
1211         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1212
1213         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1214         if (!se_nacl) {
1215                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1216                 return NULL;
1217         }
1218         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1219             se_nacl, se_nacl->initiatorname);
1220
1221         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1222         if (!nacl->fc_port) {
1223                 pr_err("Unable to locate struct fc_port\n");
1224                 return NULL;
1225         }
1226
1227         return nacl->fc_port;
1228 }
1229
1230 /*
1231  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1232  */
1233 static void tcm_qla2xxx_set_sess_by_s_id(
1234         struct tcm_qla2xxx_lport *lport,
1235         struct se_node_acl *new_se_nacl,
1236         struct tcm_qla2xxx_nacl *nacl,
1237         struct se_session *se_sess,
1238         struct fc_port *fc_port,
1239         uint8_t *s_id)
1240 {
1241         u32 key;
1242         void *slot;
1243         int rc;
1244
1245         key = sid_to_key(s_id);
1246         pr_debug("set_sess_by_s_id: %06x\n", key);
1247
1248         slot = btree_lookup32(&lport->lport_fcport_map, key);
1249         if (!slot) {
1250                 if (new_se_nacl) {
1251                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1252                         nacl->nport_id = key;
1253                         rc = btree_insert32(&lport->lport_fcport_map, key,
1254                                         new_se_nacl, GFP_ATOMIC);
1255                         if (rc)
1256                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1257                                     (int)key);
1258                 } else {
1259                         pr_debug("Wiping nonexisting fc_port entry\n");
1260                 }
1261
1262                 fc_port->se_sess = se_sess;
1263                 nacl->fc_port = fc_port;
1264                 return;
1265         }
1266
1267         if (nacl->fc_port) {
1268                 if (new_se_nacl == NULL) {
1269                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1270                         btree_remove32(&lport->lport_fcport_map, key);
1271                         nacl->fc_port = NULL;
1272                         return;
1273                 }
1274                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1275                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1276                 fc_port->se_sess = se_sess;
1277                 nacl->fc_port = fc_port;
1278                 return;
1279         }
1280
1281         if (new_se_nacl == NULL) {
1282                 pr_debug("Clearing existing fc_port entry\n");
1283                 btree_remove32(&lport->lport_fcport_map, key);
1284                 return;
1285         }
1286
1287         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1288         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1289         fc_port->se_sess = se_sess;
1290         nacl->fc_port = fc_port;
1291
1292         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1293             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1294 }
1295
1296 /*
1297  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1298  */
1299 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1300         scsi_qla_host_t *vha,
1301         const uint16_t loop_id)
1302 {
1303         struct tcm_qla2xxx_lport *lport;
1304         struct se_node_acl *se_nacl;
1305         struct tcm_qla2xxx_nacl *nacl;
1306         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1307
1308         lport = vha->vha_tgt.target_lport_ptr;
1309         if (!lport) {
1310                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1311                 dump_stack();
1312                 return NULL;
1313         }
1314
1315         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1316
1317         fc_loopid = lport->lport_loopid_map + loop_id;
1318         se_nacl = fc_loopid->se_nacl;
1319         if (!se_nacl) {
1320                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1321                     loop_id);
1322                 return NULL;
1323         }
1324
1325         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1326
1327         if (!nacl->fc_port) {
1328                 pr_err("Unable to locate struct fc_port\n");
1329                 return NULL;
1330         }
1331
1332         return nacl->fc_port;
1333 }
1334
1335 /*
1336  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1337  */
1338 static void tcm_qla2xxx_set_sess_by_loop_id(
1339         struct tcm_qla2xxx_lport *lport,
1340         struct se_node_acl *new_se_nacl,
1341         struct tcm_qla2xxx_nacl *nacl,
1342         struct se_session *se_sess,
1343         struct fc_port *fc_port,
1344         uint16_t loop_id)
1345 {
1346         struct se_node_acl *saved_nacl;
1347         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1348
1349         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1350
1351         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1352                         lport->lport_loopid_map)[loop_id];
1353
1354         saved_nacl = fc_loopid->se_nacl;
1355         if (!saved_nacl) {
1356                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1357                 fc_loopid->se_nacl = new_se_nacl;
1358                 if (fc_port->se_sess != se_sess)
1359                         fc_port->se_sess = se_sess;
1360                 if (nacl->fc_port != fc_port)
1361                         nacl->fc_port = fc_port;
1362                 return;
1363         }
1364
1365         if (nacl->fc_port) {
1366                 if (new_se_nacl == NULL) {
1367                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1368                         fc_loopid->se_nacl = NULL;
1369                         nacl->fc_port = NULL;
1370                         return;
1371                 }
1372
1373                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1374                 fc_loopid->se_nacl = new_se_nacl;
1375                 if (fc_port->se_sess != se_sess)
1376                         fc_port->se_sess = se_sess;
1377                 if (nacl->fc_port != fc_port)
1378                         nacl->fc_port = fc_port;
1379                 return;
1380         }
1381
1382         if (new_se_nacl == NULL) {
1383                 pr_debug("Clearing fc_loopid->se_nacl\n");
1384                 fc_loopid->se_nacl = NULL;
1385                 return;
1386         }
1387
1388         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1389         fc_loopid->se_nacl = new_se_nacl;
1390         if (fc_port->se_sess != se_sess)
1391                 fc_port->se_sess = se_sess;
1392         if (nacl->fc_port != fc_port)
1393                 nacl->fc_port = fc_port;
1394
1395         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1396             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1397 }
1398
1399 /*
1400  * Should always be called with qla_hw_data->tgt.sess_lock held.
1401  */
1402 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1403                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1404 {
1405         struct se_session *se_sess = sess->se_sess;
1406         unsigned char be_sid[3];
1407
1408         be_sid[0] = sess->d_id.b.domain;
1409         be_sid[1] = sess->d_id.b.area;
1410         be_sid[2] = sess->d_id.b.al_pa;
1411
1412         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1413                                 sess, be_sid);
1414         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1415                                 sess, sess->loop_id);
1416 }
1417
1418 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1419 {
1420         struct qla_tgt *tgt = sess->tgt;
1421         struct qla_hw_data *ha = tgt->ha;
1422         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1423         struct se_session *se_sess;
1424         struct tcm_qla2xxx_lport *lport;
1425
1426         BUG_ON(in_interrupt());
1427
1428         se_sess = sess->se_sess;
1429         if (!se_sess) {
1430                 pr_err("struct fc_port->se_sess is NULL\n");
1431                 dump_stack();
1432                 return;
1433         }
1434
1435         lport = vha->vha_tgt.target_lport_ptr;
1436         if (!lport) {
1437                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1438                 dump_stack();
1439                 return;
1440         }
1441         target_wait_for_sess_cmds(se_sess);
1442
1443         transport_deregister_session_configfs(sess->se_sess);
1444         transport_deregister_session(sess->se_sess);
1445 }
1446
1447 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1448                                   struct se_session *se_sess, void *p)
1449 {
1450         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1451                                 struct tcm_qla2xxx_tpg, se_tpg);
1452         struct tcm_qla2xxx_lport *lport = tpg->lport;
1453         struct qla_hw_data *ha = lport->qla_vha->hw;
1454         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1455         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1456                                 struct tcm_qla2xxx_nacl, se_node_acl);
1457         struct fc_port *qlat_sess = p;
1458         uint16_t loop_id = qlat_sess->loop_id;
1459         unsigned long flags;
1460         unsigned char be_sid[3];
1461
1462         be_sid[0] = qlat_sess->d_id.b.domain;
1463         be_sid[1] = qlat_sess->d_id.b.area;
1464         be_sid[2] = qlat_sess->d_id.b.al_pa;
1465
1466         /*
1467          * And now setup se_nacl and session pointers into HW lport internal
1468          * mappings for fabric S_ID and LOOP_ID.
1469          */
1470         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1471         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1472                                      se_sess, qlat_sess, be_sid);
1473         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1474                                         se_sess, qlat_sess, loop_id);
1475         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1476
1477         return 0;
1478 }
1479
1480 /*
1481  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1482  * to locate struct se_node_acl
1483  */
1484 static int tcm_qla2xxx_check_initiator_node_acl(
1485         scsi_qla_host_t *vha,
1486         unsigned char *fc_wwpn,
1487         struct fc_port *qlat_sess)
1488 {
1489         struct qla_hw_data *ha = vha->hw;
1490         struct tcm_qla2xxx_lport *lport;
1491         struct tcm_qla2xxx_tpg *tpg;
1492         struct se_session *se_sess;
1493         unsigned char port_name[36];
1494         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1495                        TCM_QLA2XXX_DEFAULT_TAGS;
1496
1497         lport = vha->vha_tgt.target_lport_ptr;
1498         if (!lport) {
1499                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1500                 dump_stack();
1501                 return -EINVAL;
1502         }
1503         /*
1504          * Locate the TPG=1 reference..
1505          */
1506         tpg = lport->tpg_1;
1507         if (!tpg) {
1508                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1509                 return -EINVAL;
1510         }
1511         /*
1512          * Format the FCP Initiator port_name into colon seperated values to
1513          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1514          */
1515         memset(&port_name, 0, 36);
1516         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1517         /*
1518          * Locate our struct se_node_acl either from an explict NodeACL created
1519          * via ConfigFS, or via running in TPG demo mode.
1520          */
1521         se_sess = target_alloc_session(&tpg->se_tpg, num_tags,
1522                                        sizeof(struct qla_tgt_cmd),
1523                                        TARGET_PROT_ALL, port_name,
1524                                        qlat_sess, tcm_qla2xxx_session_cb);
1525         if (IS_ERR(se_sess))
1526                 return PTR_ERR(se_sess);
1527
1528         return 0;
1529 }
1530
1531 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1532                                     uint16_t loop_id, bool conf_compl_supported)
1533 {
1534         struct qla_tgt *tgt = sess->tgt;
1535         struct qla_hw_data *ha = tgt->ha;
1536         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1537         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1538         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1539         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1540                         struct tcm_qla2xxx_nacl, se_node_acl);
1541         u32 key;
1542
1543
1544         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1545                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1546                     sess, sess->port_name,
1547                     sess->loop_id, loop_id, sess->d_id.b.domain,
1548                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1549                     s_id.b.area, s_id.b.al_pa);
1550
1551         if (sess->loop_id != loop_id) {
1552                 /*
1553                  * Because we can shuffle loop IDs around and we
1554                  * update different sessions non-atomically, we might
1555                  * have overwritten this session's old loop ID
1556                  * already, and we might end up overwriting some other
1557                  * session that will be updated later.  So we have to
1558                  * be extra careful and we can't warn about those things...
1559                  */
1560                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1561                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1562
1563                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1564
1565                 sess->loop_id = loop_id;
1566         }
1567
1568         if (sess->d_id.b24 != s_id.b24) {
1569                 key = (((u32) sess->d_id.b.domain << 16) |
1570                        ((u32) sess->d_id.b.area   <<  8) |
1571                        ((u32) sess->d_id.b.al_pa));
1572
1573                 if (btree_lookup32(&lport->lport_fcport_map, key))
1574                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1575                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1576                             sess->d_id.b.domain, sess->d_id.b.area,
1577                             sess->d_id.b.al_pa);
1578                 else
1579                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1580                              sess->d_id.b.domain, sess->d_id.b.area,
1581                              sess->d_id.b.al_pa);
1582
1583                 key = (((u32) s_id.b.domain << 16) |
1584                        ((u32) s_id.b.area   <<  8) |
1585                        ((u32) s_id.b.al_pa));
1586
1587                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1588                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1589                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1590                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1591                 } else {
1592                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1593                             GFP_ATOMIC);
1594                 }
1595
1596                 sess->d_id = s_id;
1597                 nacl->nport_id = key;
1598         }
1599
1600         sess->conf_compl_supported = conf_compl_supported;
1601
1602         /* Reset logout parameters to default */
1603         sess->logout_on_delete = 1;
1604         sess->keep_nport_handle = 0;
1605 }
1606
1607 /*
1608  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1609  */
1610 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1611         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1612         .handle_data            = tcm_qla2xxx_handle_data,
1613         .handle_dif_err         = tcm_qla2xxx_handle_dif_err,
1614         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1615         .free_cmd               = tcm_qla2xxx_free_cmd,
1616         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1617         .free_session           = tcm_qla2xxx_free_session,
1618         .update_sess            = tcm_qla2xxx_update_sess,
1619         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1620         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1621         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1622         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1623         .put_sess               = tcm_qla2xxx_put_sess,
1624         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1625 };
1626
1627 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1628 {
1629         int rc;
1630
1631         rc = btree_init32(&lport->lport_fcport_map);
1632         if (rc) {
1633                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1634                 return rc;
1635         }
1636
1637         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1638                                 65536);
1639         if (!lport->lport_loopid_map) {
1640                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1641                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1642                 btree_destroy32(&lport->lport_fcport_map);
1643                 return -ENOMEM;
1644         }
1645         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1646                * 65536);
1647         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1648                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1649         return 0;
1650 }
1651
1652 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1653                                          void *target_lport_ptr,
1654                                          u64 npiv_wwpn, u64 npiv_wwnn)
1655 {
1656         struct qla_hw_data *ha = vha->hw;
1657         struct tcm_qla2xxx_lport *lport =
1658                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1659         /*
1660          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1661          */
1662         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1663         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1664         lport->qla_vha = vha;
1665
1666         return 0;
1667 }
1668
1669 static struct se_wwn *tcm_qla2xxx_make_lport(
1670         struct target_fabric_configfs *tf,
1671         struct config_group *group,
1672         const char *name)
1673 {
1674         struct tcm_qla2xxx_lport *lport;
1675         u64 wwpn;
1676         int ret = -ENODEV;
1677
1678         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1679                 return ERR_PTR(-EINVAL);
1680
1681         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1682         if (!lport) {
1683                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1684                 return ERR_PTR(-ENOMEM);
1685         }
1686         lport->lport_wwpn = wwpn;
1687         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1688                                 wwpn);
1689         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1690
1691         ret = tcm_qla2xxx_init_lport(lport);
1692         if (ret != 0)
1693                 goto out;
1694
1695         ret = qlt_lport_register(lport, wwpn, 0, 0,
1696                                  tcm_qla2xxx_lport_register_cb);
1697         if (ret != 0)
1698                 goto out_lport;
1699
1700         return &lport->lport_wwn;
1701 out_lport:
1702         vfree(lport->lport_loopid_map);
1703         btree_destroy32(&lport->lport_fcport_map);
1704 out:
1705         kfree(lport);
1706         return ERR_PTR(ret);
1707 }
1708
1709 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1710 {
1711         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1712                         struct tcm_qla2xxx_lport, lport_wwn);
1713         struct scsi_qla_host *vha = lport->qla_vha;
1714         struct se_node_acl *node;
1715         u32 key = 0;
1716
1717         /*
1718          * Call into qla2x_target.c LLD logic to complete the
1719          * shutdown of struct qla_tgt after the call to
1720          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1721          */
1722         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1723                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1724
1725         qlt_lport_deregister(vha);
1726
1727         vfree(lport->lport_loopid_map);
1728         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1729                 btree_remove32(&lport->lport_fcport_map, key);
1730         btree_destroy32(&lport->lport_fcport_map);
1731         kfree(lport);
1732 }
1733
1734 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1735                                               void *target_lport_ptr,
1736                                               u64 npiv_wwpn, u64 npiv_wwnn)
1737 {
1738         struct fc_vport *vport;
1739         struct Scsi_Host *sh = base_vha->host;
1740         struct scsi_qla_host *npiv_vha;
1741         struct tcm_qla2xxx_lport *lport =
1742                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1743         struct tcm_qla2xxx_lport *base_lport =
1744                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1745         struct fc_vport_identifiers vport_id;
1746
1747         if (qla_ini_mode_enabled(base_vha)) {
1748                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1749                 return -EPERM;
1750         }
1751
1752         if (!base_lport || !base_lport->tpg_1 ||
1753             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1754                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1755                 return -EPERM;
1756         }
1757
1758         memset(&vport_id, 0, sizeof(vport_id));
1759         vport_id.port_name = npiv_wwpn;
1760         vport_id.node_name = npiv_wwnn;
1761         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1762         vport_id.vport_type = FC_PORTTYPE_NPIV;
1763         vport_id.disable = false;
1764
1765         vport = fc_vport_create(sh, 0, &vport_id);
1766         if (!vport) {
1767                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1768                 return -ENODEV;
1769         }
1770         /*
1771          * Setup local pointer to NPIV vhba + target_lport_ptr
1772          */
1773         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1774         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1775         lport->qla_vha = npiv_vha;
1776         scsi_host_get(npiv_vha->host);
1777         return 0;
1778 }
1779
1780
1781 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1782         struct target_fabric_configfs *tf,
1783         struct config_group *group,
1784         const char *name)
1785 {
1786         struct tcm_qla2xxx_lport *lport;
1787         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1788         char *p, tmp[128];
1789         int ret;
1790
1791         snprintf(tmp, 128, "%s", name);
1792
1793         p = strchr(tmp, '@');
1794         if (!p) {
1795                 pr_err("Unable to locate NPIV '@' seperator\n");
1796                 return ERR_PTR(-EINVAL);
1797         }
1798         *p++ = '\0';
1799
1800         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1801                 return ERR_PTR(-EINVAL);
1802
1803         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1804                                        &npiv_wwpn, &npiv_wwnn) < 0)
1805                 return ERR_PTR(-EINVAL);
1806
1807         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1808         if (!lport) {
1809                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1810                 return ERR_PTR(-ENOMEM);
1811         }
1812         lport->lport_npiv_wwpn = npiv_wwpn;
1813         lport->lport_npiv_wwnn = npiv_wwnn;
1814         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1815
1816         ret = tcm_qla2xxx_init_lport(lport);
1817         if (ret != 0)
1818                 goto out;
1819
1820         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1821                                  tcm_qla2xxx_lport_register_npiv_cb);
1822         if (ret != 0)
1823                 goto out_lport;
1824
1825         return &lport->lport_wwn;
1826 out_lport:
1827         vfree(lport->lport_loopid_map);
1828         btree_destroy32(&lport->lport_fcport_map);
1829 out:
1830         kfree(lport);
1831         return ERR_PTR(ret);
1832 }
1833
1834 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1835 {
1836         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1837                         struct tcm_qla2xxx_lport, lport_wwn);
1838         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1839         struct qla_hw_data *ha = npiv_vha->hw;
1840         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1841
1842         scsi_host_put(npiv_vha->host);
1843         /*
1844          * Notify libfc that we want to release the vha->fc_vport
1845          */
1846         fc_vport_terminate(npiv_vha->fc_vport);
1847         scsi_host_put(base_vha->host);
1848         kfree(lport);
1849 }
1850
1851
1852 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1853                 char *page)
1854 {
1855         return sprintf(page,
1856             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1857             UTS_RELEASE"\n", QLA2XXX_VERSION, utsname()->sysname,
1858             utsname()->machine);
1859 }
1860
1861 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1862
1863 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1864         &tcm_qla2xxx_wwn_attr_version,
1865         NULL,
1866 };
1867
1868 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1869         .module                         = THIS_MODULE,
1870         .name                           = "qla2xxx",
1871         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1872         /*
1873          * XXX: Limit assumes single page per scatter-gather-list entry.
1874          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1875          */
1876         .max_data_sg_nents              = 1200,
1877         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1878         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1879         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1880         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1881         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1882         .tpg_check_demo_mode_write_protect =
1883                                         tcm_qla2xxx_check_demo_write_protect,
1884         .tpg_check_prod_mode_write_protect =
1885                                         tcm_qla2xxx_check_prod_write_protect,
1886         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1887         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1888         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1889         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1890         .release_cmd                    = tcm_qla2xxx_release_cmd,
1891         .close_session                  = tcm_qla2xxx_close_session,
1892         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1893         .sess_get_initiator_sid         = NULL,
1894         .write_pending                  = tcm_qla2xxx_write_pending,
1895         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1896         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1897         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1898         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1899         .queue_status                   = tcm_qla2xxx_queue_status,
1900         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1901         .aborted_task                   = tcm_qla2xxx_aborted_task,
1902         /*
1903          * Setup function pointers for generic logic in
1904          * target_core_fabric_configfs.c
1905          */
1906         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1907         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1908         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1909         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1910         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1911
1912         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1913         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1914         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1915 };
1916
1917 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1918         .module                         = THIS_MODULE,
1919         .name                           = "qla2xxx_npiv",
1920         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1921         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1922         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1923         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1924         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1925         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1926         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1927         .tpg_check_prod_mode_write_protect =
1928             tcm_qla2xxx_check_prod_write_protect,
1929         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1930         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1931         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1932         .release_cmd                    = tcm_qla2xxx_release_cmd,
1933         .close_session                  = tcm_qla2xxx_close_session,
1934         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1935         .sess_get_initiator_sid         = NULL,
1936         .write_pending                  = tcm_qla2xxx_write_pending,
1937         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1938         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1939         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1940         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1941         .queue_status                   = tcm_qla2xxx_queue_status,
1942         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1943         .aborted_task                   = tcm_qla2xxx_aborted_task,
1944         /*
1945          * Setup function pointers for generic logic in
1946          * target_core_fabric_configfs.c
1947          */
1948         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1949         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1950         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1951         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1952         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1953
1954         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1955         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1956 };
1957
1958 static int tcm_qla2xxx_register_configfs(void)
1959 {
1960         int ret;
1961
1962         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1963             UTS_RELEASE"\n", QLA2XXX_VERSION, utsname()->sysname,
1964             utsname()->machine);
1965
1966         ret = target_register_template(&tcm_qla2xxx_ops);
1967         if (ret)
1968                 return ret;
1969
1970         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1971         if (ret)
1972                 goto out_fabric;
1973
1974         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1975                                                 WQ_MEM_RECLAIM, 0);
1976         if (!tcm_qla2xxx_free_wq) {
1977                 ret = -ENOMEM;
1978                 goto out_fabric_npiv;
1979         }
1980
1981         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1982         if (!tcm_qla2xxx_cmd_wq) {
1983                 ret = -ENOMEM;
1984                 goto out_free_wq;
1985         }
1986
1987         return 0;
1988
1989 out_free_wq:
1990         destroy_workqueue(tcm_qla2xxx_free_wq);
1991 out_fabric_npiv:
1992         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1993 out_fabric:
1994         target_unregister_template(&tcm_qla2xxx_ops);
1995         return ret;
1996 }
1997
1998 static void tcm_qla2xxx_deregister_configfs(void)
1999 {
2000         destroy_workqueue(tcm_qla2xxx_cmd_wq);
2001         destroy_workqueue(tcm_qla2xxx_free_wq);
2002
2003         target_unregister_template(&tcm_qla2xxx_ops);
2004         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2005 }
2006
2007 static int __init tcm_qla2xxx_init(void)
2008 {
2009         int ret;
2010
2011         ret = tcm_qla2xxx_register_configfs();
2012         if (ret < 0)
2013                 return ret;
2014
2015         return 0;
2016 }
2017
2018 static void __exit tcm_qla2xxx_exit(void)
2019 {
2020         tcm_qla2xxx_deregister_configfs();
2021 }
2022
2023 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2024 MODULE_LICENSE("GPL");
2025 module_init(tcm_qla2xxx_init);
2026 module_exit(tcm_qla2xxx_exit);