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