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  */
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 
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  */
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  */
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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  */
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 
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 
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 
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  */
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  */
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  */
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 
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 
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 
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 
380 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
381 {
382 	return 0;
383 }
384 
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 
424 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
425 {
426 	return;
427 }
428 
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  */
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 
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  */
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 
563 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
564 {
565 	return 0;
566 }
567 
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  */
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 
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 
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 
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 
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 
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  */
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 
832 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
833 {
834 	target_stop_session(sess->se_sess);
835 }
836 
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 
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 
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 
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 
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 
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 
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 
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 
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  */
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  */
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  */
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  */
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  */
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 
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 
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  */
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 
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 
1552 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1553 {
1554 	int rc;
1555 	size_t map_sz;
1556 
1557 	rc = btree_init32(&lport->lport_fcport_map);
1558 	if (rc) {
1559 		pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1560 		return rc;
1561 	}
1562 
1563 	map_sz = array_size(65536, sizeof(struct tcm_qla2xxx_fc_loopid));
1564 
1565 	lport->lport_loopid_map = vzalloc(map_sz);
1566 	if (!lport->lport_loopid_map) {
1567 		pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n", map_sz);
1568 		btree_destroy32(&lport->lport_fcport_map);
1569 		return -ENOMEM;
1570 	}
1571 	pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n", map_sz);
1572 	return 0;
1573 }
1574 
1575 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1576 					 void *target_lport_ptr,
1577 					 u64 npiv_wwpn, u64 npiv_wwnn)
1578 {
1579 	struct qla_hw_data *ha = vha->hw;
1580 	struct tcm_qla2xxx_lport *lport =
1581 			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1582 	/*
1583 	 * Setup tgt_ops, local pointer to vha and target_lport_ptr
1584 	 */
1585 	ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1586 	vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1587 	lport->qla_vha = vha;
1588 
1589 	return 0;
1590 }
1591 
1592 static struct se_wwn *tcm_qla2xxx_make_lport(
1593 	struct target_fabric_configfs *tf,
1594 	struct config_group *group,
1595 	const char *name)
1596 {
1597 	struct tcm_qla2xxx_lport *lport;
1598 	u64 wwpn;
1599 	int ret = -ENODEV;
1600 
1601 	if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1602 		return ERR_PTR(-EINVAL);
1603 
1604 	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1605 	if (!lport) {
1606 		pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1607 		return ERR_PTR(-ENOMEM);
1608 	}
1609 	lport->lport_wwpn = wwpn;
1610 	tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1611 				wwpn);
1612 	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1613 
1614 	ret = tcm_qla2xxx_init_lport(lport);
1615 	if (ret != 0)
1616 		goto out;
1617 
1618 	ret = qlt_lport_register(lport, wwpn, 0, 0,
1619 				 tcm_qla2xxx_lport_register_cb);
1620 	if (ret != 0)
1621 		goto out_lport;
1622 
1623 	return &lport->lport_wwn;
1624 out_lport:
1625 	vfree(lport->lport_loopid_map);
1626 	btree_destroy32(&lport->lport_fcport_map);
1627 out:
1628 	kfree(lport);
1629 	return ERR_PTR(ret);
1630 }
1631 
1632 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1633 {
1634 	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1635 			struct tcm_qla2xxx_lport, lport_wwn);
1636 	struct scsi_qla_host *vha = lport->qla_vha;
1637 	struct se_node_acl *node;
1638 	u32 key = 0;
1639 
1640 	/*
1641 	 * Call into qla2x_target.c LLD logic to complete the
1642 	 * shutdown of struct qla_tgt after the call to
1643 	 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1644 	 */
1645 	if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1646 		qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1647 
1648 	qlt_lport_deregister(vha);
1649 
1650 	vfree(lport->lport_loopid_map);
1651 	btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1652 		btree_remove32(&lport->lport_fcport_map, key);
1653 	btree_destroy32(&lport->lport_fcport_map);
1654 	kfree(lport);
1655 }
1656 
1657 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1658 					      void *target_lport_ptr,
1659 					      u64 npiv_wwpn, u64 npiv_wwnn)
1660 {
1661 	struct fc_vport *vport;
1662 	struct Scsi_Host *sh = base_vha->host;
1663 	struct scsi_qla_host *npiv_vha;
1664 	struct tcm_qla2xxx_lport *lport =
1665 			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1666 	struct tcm_qla2xxx_lport *base_lport =
1667 			(struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1668 	struct fc_vport_identifiers vport_id;
1669 
1670 	if (qla_ini_mode_enabled(base_vha)) {
1671 		pr_err("qla2xxx base_vha not enabled for target mode\n");
1672 		return -EPERM;
1673 	}
1674 
1675 	if (!base_lport || !base_lport->tpg_1 ||
1676 	    !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1677 		pr_err("qla2xxx base_lport or tpg_1 not available\n");
1678 		return -EPERM;
1679 	}
1680 
1681 	memset(&vport_id, 0, sizeof(vport_id));
1682 	vport_id.port_name = npiv_wwpn;
1683 	vport_id.node_name = npiv_wwnn;
1684 	vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1685 	vport_id.vport_type = FC_PORTTYPE_NPIV;
1686 	vport_id.disable = false;
1687 
1688 	vport = fc_vport_create(sh, 0, &vport_id);
1689 	if (!vport) {
1690 		pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1691 		return -ENODEV;
1692 	}
1693 	/*
1694 	 * Setup local pointer to NPIV vhba + target_lport_ptr
1695 	 */
1696 	npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1697 	npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1698 	lport->qla_vha = npiv_vha;
1699 	scsi_host_get(npiv_vha->host);
1700 	return 0;
1701 }
1702 
1703 
1704 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1705 	struct target_fabric_configfs *tf,
1706 	struct config_group *group,
1707 	const char *name)
1708 {
1709 	struct tcm_qla2xxx_lport *lport;
1710 	u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1711 	char *p, tmp[128];
1712 	int ret;
1713 
1714 	snprintf(tmp, 128, "%s", name);
1715 
1716 	p = strchr(tmp, '@');
1717 	if (!p) {
1718 		pr_err("Unable to locate NPIV '@' separator\n");
1719 		return ERR_PTR(-EINVAL);
1720 	}
1721 	*p++ = '\0';
1722 
1723 	if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1724 		return ERR_PTR(-EINVAL);
1725 
1726 	if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1727 				       &npiv_wwpn, &npiv_wwnn) < 0)
1728 		return ERR_PTR(-EINVAL);
1729 
1730 	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1731 	if (!lport) {
1732 		pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1733 		return ERR_PTR(-ENOMEM);
1734 	}
1735 	lport->lport_npiv_wwpn = npiv_wwpn;
1736 	lport->lport_npiv_wwnn = npiv_wwnn;
1737 	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1738 
1739 	ret = tcm_qla2xxx_init_lport(lport);
1740 	if (ret != 0)
1741 		goto out;
1742 
1743 	ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1744 				 tcm_qla2xxx_lport_register_npiv_cb);
1745 	if (ret != 0)
1746 		goto out_lport;
1747 
1748 	return &lport->lport_wwn;
1749 out_lport:
1750 	vfree(lport->lport_loopid_map);
1751 	btree_destroy32(&lport->lport_fcport_map);
1752 out:
1753 	kfree(lport);
1754 	return ERR_PTR(ret);
1755 }
1756 
1757 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1758 {
1759 	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1760 			struct tcm_qla2xxx_lport, lport_wwn);
1761 	struct scsi_qla_host *npiv_vha = lport->qla_vha;
1762 	struct qla_hw_data *ha = npiv_vha->hw;
1763 	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1764 
1765 	scsi_host_put(npiv_vha->host);
1766 	/*
1767 	 * Notify libfc that we want to release the vha->fc_vport
1768 	 */
1769 	fc_vport_terminate(npiv_vha->fc_vport);
1770 	scsi_host_put(base_vha->host);
1771 	kfree(lport);
1772 }
1773 
1774 
1775 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1776 		char *page)
1777 {
1778 	return sprintf(page,
1779 	    "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1780 	    QLA2XXX_VERSION, utsname()->sysname,
1781 	    utsname()->machine, utsname()->release);
1782 }
1783 
1784 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1785 
1786 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1787 	&tcm_qla2xxx_wwn_attr_version,
1788 	NULL,
1789 };
1790 
1791 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1792 	.module				= THIS_MODULE,
1793 	.fabric_name			= "qla2xxx",
1794 	.node_acl_size			= sizeof(struct tcm_qla2xxx_nacl),
1795 	/*
1796 	 * XXX: Limit assumes single page per scatter-gather-list entry.
1797 	 * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1798 	 */
1799 	.max_data_sg_nents		= 1200,
1800 	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
1801 	.tpg_get_tag			= tcm_qla2xxx_get_tag,
1802 	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
1803 	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
1804 	.tpg_check_demo_mode_write_protect =
1805 					tcm_qla2xxx_check_demo_write_protect,
1806 	.tpg_check_prod_mode_write_protect =
1807 					tcm_qla2xxx_check_prod_write_protect,
1808 	.tpg_check_prot_fabric_only	= tcm_qla2xxx_check_prot_fabric_only,
1809 	.tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1810 	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
1811 	.check_stop_free		= tcm_qla2xxx_check_stop_free,
1812 	.release_cmd			= tcm_qla2xxx_release_cmd,
1813 	.close_session			= tcm_qla2xxx_close_session,
1814 	.sess_get_index			= tcm_qla2xxx_sess_get_index,
1815 	.sess_get_initiator_sid		= NULL,
1816 	.write_pending			= tcm_qla2xxx_write_pending,
1817 	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
1818 	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
1819 	.queue_data_in			= tcm_qla2xxx_queue_data_in,
1820 	.queue_status			= tcm_qla2xxx_queue_status,
1821 	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
1822 	.aborted_task			= tcm_qla2xxx_aborted_task,
1823 	/*
1824 	 * Setup function pointers for generic logic in
1825 	 * target_core_fabric_configfs.c
1826 	 */
1827 	.fabric_make_wwn		= tcm_qla2xxx_make_lport,
1828 	.fabric_drop_wwn		= tcm_qla2xxx_drop_lport,
1829 	.fabric_make_tpg		= tcm_qla2xxx_make_tpg,
1830 	.fabric_enable_tpg		= tcm_qla2xxx_enable_tpg,
1831 	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
1832 	.fabric_init_nodeacl		= tcm_qla2xxx_init_nodeacl,
1833 
1834 	.tfc_wwn_attrs			= tcm_qla2xxx_wwn_attrs,
1835 	.tfc_tpg_base_attrs		= tcm_qla2xxx_tpg_attrs,
1836 	.tfc_tpg_attrib_attrs		= tcm_qla2xxx_tpg_attrib_attrs,
1837 };
1838 
1839 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1840 	.module				= THIS_MODULE,
1841 	.fabric_name			= "qla2xxx_npiv",
1842 	.node_acl_size			= sizeof(struct tcm_qla2xxx_nacl),
1843 	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
1844 	.tpg_get_tag			= tcm_qla2xxx_get_tag,
1845 	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
1846 	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
1847 	.tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1848 	.tpg_check_prod_mode_write_protect =
1849 	    tcm_qla2xxx_check_prod_write_protect,
1850 	.tpg_check_demo_mode_login_only	= tcm_qla2xxx_check_demo_mode_login_only,
1851 	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
1852 	.check_stop_free                = tcm_qla2xxx_check_stop_free,
1853 	.release_cmd			= tcm_qla2xxx_release_cmd,
1854 	.close_session			= tcm_qla2xxx_close_session,
1855 	.sess_get_index			= tcm_qla2xxx_sess_get_index,
1856 	.sess_get_initiator_sid		= NULL,
1857 	.write_pending			= tcm_qla2xxx_write_pending,
1858 	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
1859 	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
1860 	.queue_data_in			= tcm_qla2xxx_queue_data_in,
1861 	.queue_status			= tcm_qla2xxx_queue_status,
1862 	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
1863 	.aborted_task			= tcm_qla2xxx_aborted_task,
1864 	/*
1865 	 * Setup function pointers for generic logic in
1866 	 * target_core_fabric_configfs.c
1867 	 */
1868 	.fabric_make_wwn		= tcm_qla2xxx_npiv_make_lport,
1869 	.fabric_drop_wwn		= tcm_qla2xxx_npiv_drop_lport,
1870 	.fabric_make_tpg		= tcm_qla2xxx_npiv_make_tpg,
1871 	.fabric_enable_tpg		= tcm_qla2xxx_npiv_enable_tpg,
1872 	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
1873 	.fabric_init_nodeacl		= tcm_qla2xxx_init_nodeacl,
1874 
1875 	.tfc_wwn_attrs			= tcm_qla2xxx_wwn_attrs,
1876 };
1877 
1878 static int tcm_qla2xxx_register_configfs(void)
1879 {
1880 	int ret;
1881 
1882 	pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1883 	    QLA2XXX_VERSION, utsname()->sysname,
1884 	    utsname()->machine, utsname()->release);
1885 
1886 	ret = target_register_template(&tcm_qla2xxx_ops);
1887 	if (ret)
1888 		return ret;
1889 
1890 	ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1891 	if (ret)
1892 		goto out_fabric;
1893 
1894 	tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1895 						WQ_MEM_RECLAIM, 0);
1896 	if (!tcm_qla2xxx_free_wq) {
1897 		ret = -ENOMEM;
1898 		goto out_fabric_npiv;
1899 	}
1900 
1901 	return 0;
1902 
1903 out_fabric_npiv:
1904 	target_unregister_template(&tcm_qla2xxx_npiv_ops);
1905 out_fabric:
1906 	target_unregister_template(&tcm_qla2xxx_ops);
1907 	return ret;
1908 }
1909 
1910 static void tcm_qla2xxx_deregister_configfs(void)
1911 {
1912 	destroy_workqueue(tcm_qla2xxx_free_wq);
1913 
1914 	target_unregister_template(&tcm_qla2xxx_ops);
1915 	target_unregister_template(&tcm_qla2xxx_npiv_ops);
1916 }
1917 
1918 static int __init tcm_qla2xxx_init(void)
1919 {
1920 	int ret;
1921 
1922 	BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
1923 	BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
1924 	BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
1925 	BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
1926 	BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
1927 	BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
1928 	BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
1929 	BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
1930 	BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
1931 	BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
1932 	BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
1933 	BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
1934 	BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
1935 	BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);
1936 
1937 	ret = tcm_qla2xxx_register_configfs();
1938 	if (ret < 0)
1939 		return ret;
1940 
1941 	return 0;
1942 }
1943 
1944 static void __exit tcm_qla2xxx_exit(void)
1945 {
1946 	tcm_qla2xxx_deregister_configfs();
1947 }
1948 
1949 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1950 MODULE_LICENSE("GPL");
1951 module_init(tcm_qla2xxx_init);
1952 module_exit(tcm_qla2xxx_exit);
1953