1 /*******************************************************************************
2  * This file contains tcm implementation using v4 configfs fabric infrastructure
3  * for QLogic target mode HBAs
4  *
5  * (c) Copyright 2010-2013 Datera, Inc.
6  *
7  * Author: Nicholas A. Bellinger <nab@daterainc.com>
8  *
9  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
10  * the TCM_FC / Open-FCoE.org fabric module.
11  *
12  * Copyright (c) 2010 Cisco Systems, Inc
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License as published by
16  * the Free Software Foundation; either version 2 of the License, or
17  * (at your option) any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  ****************************************************************************/
24 
25 
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/utsname.h>
29 #include <linux/vmalloc.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/slab.h>
33 #include <linux/kthread.h>
34 #include <linux/types.h>
35 #include <linux/string.h>
36 #include <linux/configfs.h>
37 #include <linux/ctype.h>
38 #include <asm/unaligned.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_device.h>
42 #include <scsi/scsi_cmnd.h>
43 #include <target/target_core_base.h>
44 #include <target/target_core_fabric.h>
45 
46 #include "qla_def.h"
47 #include "qla_target.h"
48 #include "tcm_qla2xxx.h"
49 
50 static struct workqueue_struct *tcm_qla2xxx_free_wq;
51 static struct workqueue_struct *tcm_qla2xxx_cmd_wq;
52 
53 /*
54  * Parse WWN.
55  * If strict, we require lower-case hex and colon separators to be sure
56  * the name is the same as what would be generated by ft_format_wwn()
57  * so the name and wwn are mapped one-to-one.
58  */
59 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
60 {
61 	const char *cp;
62 	char c;
63 	u32 nibble;
64 	u32 byte = 0;
65 	u32 pos = 0;
66 	u32 err;
67 
68 	*wwn = 0;
69 	for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
70 		c = *cp;
71 		if (c == '\n' && cp[1] == '\0')
72 			continue;
73 		if (strict && pos++ == 2 && byte++ < 7) {
74 			pos = 0;
75 			if (c == ':')
76 				continue;
77 			err = 1;
78 			goto fail;
79 		}
80 		if (c == '\0') {
81 			err = 2;
82 			if (strict && byte != 8)
83 				goto fail;
84 			return cp - name;
85 		}
86 		err = 3;
87 		if (isdigit(c))
88 			nibble = c - '0';
89 		else if (isxdigit(c) && (islower(c) || !strict))
90 			nibble = tolower(c) - 'a' + 10;
91 		else
92 			goto fail;
93 		*wwn = (*wwn << 4) | nibble;
94 	}
95 	err = 4;
96 fail:
97 	pr_debug("err %u len %zu pos %u byte %u\n",
98 			err, cp - name, pos, byte);
99 	return -1;
100 }
101 
102 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
103 {
104 	u8 b[8];
105 
106 	put_unaligned_be64(wwn, b);
107 	return snprintf(buf, len,
108 		"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
109 		b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
110 }
111 
112 static char *tcm_qla2xxx_get_fabric_name(void)
113 {
114 	return "qla2xxx";
115 }
116 
117 /*
118  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
119  */
120 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
121 {
122 	unsigned int i, j;
123 	u8 wwn[8];
124 
125 	memset(wwn, 0, sizeof(wwn));
126 
127 	/* Validate and store the new name */
128 	for (i = 0, j = 0; i < 16; i++) {
129 		int value;
130 
131 		value = hex_to_bin(*ns++);
132 		if (value >= 0)
133 			j = (j << 4) | value;
134 		else
135 			return -EINVAL;
136 
137 		if (i % 2) {
138 			wwn[i/2] = j & 0xff;
139 			j = 0;
140 		}
141 	}
142 
143 	*nm = wwn_to_u64(wwn);
144 	return 0;
145 }
146 
147 /*
148  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
149  * store_fc_host_vport_create()
150  */
151 static int tcm_qla2xxx_npiv_parse_wwn(
152 	const char *name,
153 	size_t count,
154 	u64 *wwpn,
155 	u64 *wwnn)
156 {
157 	unsigned int cnt = count;
158 	int rc;
159 
160 	*wwpn = 0;
161 	*wwnn = 0;
162 
163 	/* count may include a LF at end of string */
164 	if (name[cnt-1] == '\n' || name[cnt-1] == 0)
165 		cnt--;
166 
167 	/* validate we have enough characters for WWPN */
168 	if ((cnt != (16+1+16)) || (name[16] != ':'))
169 		return -EINVAL;
170 
171 	rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
172 	if (rc != 0)
173 		return rc;
174 
175 	rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
176 	if (rc != 0)
177 		return rc;
178 
179 	return 0;
180 }
181 
182 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
183 {
184 	return "qla2xxx_npiv";
185 }
186 
187 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
188 {
189 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
190 				struct tcm_qla2xxx_tpg, se_tpg);
191 	struct tcm_qla2xxx_lport *lport = tpg->lport;
192 
193 	return lport->lport_naa_name;
194 }
195 
196 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
197 {
198 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
199 				struct tcm_qla2xxx_tpg, se_tpg);
200 	return tpg->lport_tpgt;
201 }
202 
203 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
204 {
205 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
206 				struct tcm_qla2xxx_tpg, se_tpg);
207 
208 	return tpg->tpg_attrib.generate_node_acls;
209 }
210 
211 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
212 {
213 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
214 				struct tcm_qla2xxx_tpg, se_tpg);
215 
216 	return tpg->tpg_attrib.cache_dynamic_acls;
217 }
218 
219 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
220 {
221 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
222 				struct tcm_qla2xxx_tpg, se_tpg);
223 
224 	return tpg->tpg_attrib.demo_mode_write_protect;
225 }
226 
227 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
228 {
229 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
230 				struct tcm_qla2xxx_tpg, se_tpg);
231 
232 	return tpg->tpg_attrib.prod_mode_write_protect;
233 }
234 
235 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
236 {
237 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
238 				struct tcm_qla2xxx_tpg, se_tpg);
239 
240 	return tpg->tpg_attrib.demo_mode_login_only;
241 }
242 
243 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
244 {
245 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
246 				struct tcm_qla2xxx_tpg, se_tpg);
247 
248 	return tpg->tpg_attrib.fabric_prot_type;
249 }
250 
251 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
252 {
253 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
254 				struct tcm_qla2xxx_tpg, se_tpg);
255 
256 	return tpg->lport_tpgt;
257 }
258 
259 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
260 {
261 	struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
262 			struct qla_tgt_mgmt_cmd, free_work);
263 
264 	transport_generic_free_cmd(&mcmd->se_cmd, 0);
265 }
266 
267 /*
268  * Called from qla_target_template->free_mcmd(), and will call
269  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
270  * release callback.  qla_hw_data->hardware_lock is expected to be held
271  */
272 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
273 {
274 	INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
275 	queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
276 }
277 
278 static void tcm_qla2xxx_complete_free(struct work_struct *work)
279 {
280 	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
281 
282 	cmd->cmd_in_wq = 0;
283 
284 	WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
285 
286 	cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
287 	cmd->trc_flags |= TRC_CMD_FREE;
288 	transport_generic_free_cmd(&cmd->se_cmd, 0);
289 }
290 
291 /*
292  * Called from qla_target_template->free_cmd(), and will call
293  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
294  * release callback.  qla_hw_data->hardware_lock is expected to be held
295  */
296 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
297 {
298 	cmd->qpair->tgt_counters.core_qla_free_cmd++;
299 	cmd->cmd_in_wq = 1;
300 
301 	WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
302 	cmd->trc_flags |= TRC_CMD_DONE;
303 
304 	INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
305 	queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
306 }
307 
308 /*
309  * Called from struct target_core_fabric_ops->check_stop_free() context
310  */
311 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
312 {
313 	struct qla_tgt_cmd *cmd;
314 
315 	if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
316 		cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
317 		cmd->trc_flags |= TRC_CMD_CHK_STOP;
318 	}
319 
320 	return target_put_sess_cmd(se_cmd);
321 }
322 
323 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
324  * fabric descriptor @se_cmd command to release
325  */
326 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
327 {
328 	struct qla_tgt_cmd *cmd;
329 
330 	if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
331 		struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
332 				struct qla_tgt_mgmt_cmd, se_cmd);
333 		qlt_free_mcmd(mcmd);
334 		return;
335 	}
336 
337 	cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
338 	qlt_free_cmd(cmd);
339 }
340 
341 static void tcm_qla2xxx_release_session(struct kref *kref)
342 {
343 	struct fc_port  *sess = container_of(kref,
344 	    struct fc_port, sess_kref);
345 
346 	qlt_unreg_sess(sess);
347 }
348 
349 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
350 {
351 	if (!sess)
352 		return;
353 
354 	assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
355 	kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
356 }
357 
358 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
359 {
360 	struct fc_port *sess = se_sess->fabric_sess_ptr;
361 	struct scsi_qla_host *vha;
362 	unsigned long flags;
363 
364 	BUG_ON(!sess);
365 	vha = sess->vha;
366 
367 	spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
368 	target_sess_cmd_list_set_waiting(se_sess);
369 	tcm_qla2xxx_put_sess(sess);
370 	spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
371 }
372 
373 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
374 {
375 	return 0;
376 }
377 
378 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
379 {
380 	struct qla_tgt_cmd *cmd = container_of(se_cmd,
381 				struct qla_tgt_cmd, se_cmd);
382 
383 	if (cmd->aborted) {
384 		/* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
385 		 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
386 		 * already kick start the free.
387 		 */
388 		pr_debug("write_pending aborted cmd[%p] refcount %d "
389 			"transport_state %x, t_state %x, se_cmd_flags %x\n",
390 			cmd, kref_read(&cmd->se_cmd.cmd_kref),
391 			cmd->se_cmd.transport_state,
392 			cmd->se_cmd.t_state,
393 			cmd->se_cmd.se_cmd_flags);
394 		return 0;
395 	}
396 	cmd->trc_flags |= TRC_XFR_RDY;
397 	cmd->bufflen = se_cmd->data_length;
398 	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
399 
400 	cmd->sg_cnt = se_cmd->t_data_nents;
401 	cmd->sg = se_cmd->t_data_sg;
402 
403 	cmd->prot_sg_cnt = se_cmd->t_prot_nents;
404 	cmd->prot_sg = se_cmd->t_prot_sg;
405 	cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
406 	se_cmd->pi_err = 0;
407 
408 	/*
409 	 * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
410 	 * the SGL mappings into PCIe memory for incoming FCP WRITE data.
411 	 */
412 	return qlt_rdy_to_xfer(cmd);
413 }
414 
415 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
416 {
417 	unsigned long flags;
418 	/*
419 	 * Check for WRITE_PENDING status to determine if we need to wait for
420 	 * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
421 	 */
422 	spin_lock_irqsave(&se_cmd->t_state_lock, flags);
423 	if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
424 	    se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
425 		spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
426 		wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
427 						50);
428 		return 0;
429 	}
430 	spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
431 
432 	return 0;
433 }
434 
435 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
436 {
437 	return;
438 }
439 
440 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
441 {
442 	if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
443 		struct qla_tgt_cmd *cmd = container_of(se_cmd,
444 				struct qla_tgt_cmd, se_cmd);
445 		return cmd->state;
446 	}
447 
448 	return 0;
449 }
450 
451 /*
452  * Called from process context in qla_target.c:qlt_do_work() code
453  */
454 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
455 	unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
456 	int data_dir, int bidi)
457 {
458 	struct se_cmd *se_cmd = &cmd->se_cmd;
459 	struct se_session *se_sess;
460 	struct fc_port *sess;
461 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
462 	struct se_portal_group *se_tpg;
463 	struct tcm_qla2xxx_tpg *tpg;
464 #endif
465 	int flags = TARGET_SCF_ACK_KREF;
466 
467 	if (bidi)
468 		flags |= TARGET_SCF_BIDI_OP;
469 
470 	if (se_cmd->cpuid != WORK_CPU_UNBOUND)
471 		flags |= TARGET_SCF_USE_CPUID;
472 
473 	sess = cmd->sess;
474 	if (!sess) {
475 		pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
476 		return -EINVAL;
477 	}
478 
479 	se_sess = sess->se_sess;
480 	if (!se_sess) {
481 		pr_err("Unable to locate active struct se_session\n");
482 		return -EINVAL;
483 	}
484 
485 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
486 	se_tpg = se_sess->se_tpg;
487 	tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
488 	if (unlikely(tpg->tpg_attrib.jam_host)) {
489 		/* return, and dont run target_submit_cmd,discarding command */
490 		return 0;
491 	}
492 #endif
493 
494 	cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
495 	return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
496 				cmd->unpacked_lun, data_length, fcp_task_attr,
497 				data_dir, flags);
498 }
499 
500 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
501 {
502 	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
503 
504 	/*
505 	 * Ensure that the complete FCP WRITE payload has been received.
506 	 * Otherwise return an exception via CHECK_CONDITION status.
507 	 */
508 	cmd->cmd_in_wq = 0;
509 
510 	cmd->qpair->tgt_counters.qla_core_ret_ctio++;
511 	if (!cmd->write_data_transferred) {
512 		/*
513 		 * Check if se_cmd has already been aborted via LUN_RESET, and
514 		 * waiting upon completion in tcm_qla2xxx_write_pending_status()
515 		 */
516 		if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
517 			complete(&cmd->se_cmd.t_transport_stop_comp);
518 			return;
519 		}
520 
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 	int flags = TARGET_SCF_ACK_KREF;
592 
593 	switch (tmr_func) {
594 	case QLA_TGT_ABTS:
595 		pr_debug("%ld: ABTS received\n", sess->vha->host_no);
596 		transl_tmr_func = TMR_ABORT_TASK;
597 		flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
598 		break;
599 	case QLA_TGT_2G_ABORT_TASK:
600 		pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
601 		transl_tmr_func = TMR_ABORT_TASK;
602 		break;
603 	case QLA_TGT_CLEAR_ACA:
604 		pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
605 		transl_tmr_func = TMR_CLEAR_ACA;
606 		break;
607 	case QLA_TGT_TARGET_RESET:
608 		pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
609 		transl_tmr_func = TMR_TARGET_WARM_RESET;
610 		break;
611 	case QLA_TGT_LUN_RESET:
612 		pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
613 		transl_tmr_func = TMR_LUN_RESET;
614 		break;
615 	case QLA_TGT_CLEAR_TS:
616 		pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
617 		transl_tmr_func = TMR_CLEAR_TASK_SET;
618 		break;
619 	case QLA_TGT_ABORT_TS:
620 		pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
621 		transl_tmr_func = TMR_ABORT_TASK_SET;
622 		break;
623 	default:
624 		pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
625 		    sess->vha->host_no, tmr_func);
626 		return -ENOSYS;
627 	}
628 
629 	return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
630 	    transl_tmr_func, GFP_ATOMIC, tag, flags);
631 }
632 
633 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
634 {
635 	struct qla_tgt_cmd *cmd = container_of(se_cmd,
636 				struct qla_tgt_cmd, se_cmd);
637 
638 	if (cmd->aborted) {
639 		/* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
640 		 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
641 		 * already kick start the free.
642 		 */
643 		pr_debug("queue_data_in aborted cmd[%p] refcount %d "
644 			"transport_state %x, t_state %x, se_cmd_flags %x\n",
645 			cmd, kref_read(&cmd->se_cmd.cmd_kref),
646 			cmd->se_cmd.transport_state,
647 			cmd->se_cmd.t_state,
648 			cmd->se_cmd.se_cmd_flags);
649 		return 0;
650 	}
651 
652 	cmd->trc_flags |= TRC_XMIT_DATA;
653 	cmd->bufflen = se_cmd->data_length;
654 	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
655 
656 	cmd->sg_cnt = se_cmd->t_data_nents;
657 	cmd->sg = se_cmd->t_data_sg;
658 	cmd->offset = 0;
659 
660 	cmd->prot_sg_cnt = se_cmd->t_prot_nents;
661 	cmd->prot_sg = se_cmd->t_prot_sg;
662 	cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
663 	se_cmd->pi_err = 0;
664 
665 	/*
666 	 * Now queue completed DATA_IN the qla2xxx LLD and response ring
667 	 */
668 	return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
669 				se_cmd->scsi_status);
670 }
671 
672 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
673 {
674 	struct qla_tgt_cmd *cmd = container_of(se_cmd,
675 				struct qla_tgt_cmd, se_cmd);
676 	int xmit_type = QLA_TGT_XMIT_STATUS;
677 
678 	if (cmd->aborted) {
679 		/*
680 		 * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
681 		 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
682 		 * already kick start the free.
683 		 */
684 		pr_debug(
685 		    "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
686 		    cmd, kref_read(&cmd->se_cmd.cmd_kref),
687 		    cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
688 		    cmd->se_cmd.se_cmd_flags);
689 		return 0;
690 	}
691 	cmd->bufflen = se_cmd->data_length;
692 	cmd->sg = NULL;
693 	cmd->sg_cnt = 0;
694 	cmd->offset = 0;
695 	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
696 	if (cmd->trc_flags & TRC_XMIT_STATUS) {
697 		pr_crit("Multiple calls for status = %p.\n", cmd);
698 		dump_stack();
699 	}
700 	cmd->trc_flags |= TRC_XMIT_STATUS;
701 
702 	if (se_cmd->data_direction == DMA_FROM_DEVICE) {
703 		/*
704 		 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
705 		 * for qla_tgt_xmit_response LLD code
706 		 */
707 		if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
708 			se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
709 			se_cmd->residual_count = 0;
710 		}
711 		se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
712 		se_cmd->residual_count += se_cmd->data_length;
713 
714 		cmd->bufflen = 0;
715 	}
716 	/*
717 	 * Now queue status response to qla2xxx LLD code and response ring
718 	 */
719 	return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
720 }
721 
722 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
723 {
724 	struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
725 	struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
726 				struct qla_tgt_mgmt_cmd, se_cmd);
727 
728 	pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
729 			mcmd, se_tmr->function, se_tmr->response);
730 	/*
731 	 * Do translation between TCM TM response codes and
732 	 * QLA2xxx FC TM response codes.
733 	 */
734 	switch (se_tmr->response) {
735 	case TMR_FUNCTION_COMPLETE:
736 		mcmd->fc_tm_rsp = FC_TM_SUCCESS;
737 		break;
738 	case TMR_TASK_DOES_NOT_EXIST:
739 		mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
740 		break;
741 	case TMR_FUNCTION_REJECTED:
742 		mcmd->fc_tm_rsp = FC_TM_REJECT;
743 		break;
744 	case TMR_LUN_DOES_NOT_EXIST:
745 	default:
746 		mcmd->fc_tm_rsp = FC_TM_FAILED;
747 		break;
748 	}
749 	/*
750 	 * Queue the TM response to QLA2xxx LLD to build a
751 	 * CTIO response packet.
752 	 */
753 	qlt_xmit_tm_rsp(mcmd);
754 }
755 
756 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
757 {
758 	struct qla_tgt_cmd *cmd = container_of(se_cmd,
759 				struct qla_tgt_cmd, se_cmd);
760 
761 	if (qlt_abort_cmd(cmd))
762 		return;
763 }
764 
765 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
766 			struct tcm_qla2xxx_nacl *, struct fc_port *);
767 /*
768  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
769  */
770 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
771 {
772 	struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
773 	struct se_portal_group *se_tpg = se_nacl->se_tpg;
774 	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
775 	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
776 				struct tcm_qla2xxx_lport, lport_wwn);
777 	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
778 				struct tcm_qla2xxx_nacl, se_node_acl);
779 	void *node;
780 
781 	pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
782 
783 	node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
784 	if (WARN_ON(node && (node != se_nacl))) {
785 		/*
786 		 * The nacl no longer matches what we think it should be.
787 		 * Most likely a new dynamic acl has been added while
788 		 * someone dropped the hardware lock.  It clearly is a
789 		 * bug elsewhere, but this bit can't make things worse.
790 		 */
791 		btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
792 			       node, GFP_ATOMIC);
793 	}
794 
795 	pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
796 	    se_nacl, nacl->nport_wwnn, nacl->nport_id);
797 	/*
798 	 * Now clear the se_nacl and session pointers from our HW lport lookup
799 	 * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
800 	 *
801 	 * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
802 	 * target_wait_for_sess_cmds() before the session waits for outstanding
803 	 * I/O to complete, to avoid a race between session shutdown execution
804 	 * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
805 	 */
806 	tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
807 }
808 
809 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
810 {
811 	assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
812 	target_sess_cmd_list_set_waiting(sess->se_sess);
813 }
814 
815 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
816 		const char *name)
817 {
818 	struct tcm_qla2xxx_nacl *nacl =
819 		container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
820 	u64 wwnn;
821 
822 	if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
823 		return -EINVAL;
824 
825 	nacl->nport_wwnn = wwnn;
826 	tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
827 
828 	return 0;
829 }
830 
831 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
832 
833 #define DEF_QLA_TPG_ATTRIB(name)					\
834 									\
835 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(			\
836 		struct config_item *item, char *page)			\
837 {									\
838 	struct se_portal_group *se_tpg = attrib_to_tpg(item);		\
839 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,		\
840 			struct tcm_qla2xxx_tpg, se_tpg);		\
841 									\
842 	return sprintf(page, "%u\n", tpg->tpg_attrib.name);	\
843 }									\
844 									\
845 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(			\
846 		struct config_item *item, const char *page, size_t count) \
847 {									\
848 	struct se_portal_group *se_tpg = attrib_to_tpg(item);		\
849 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,		\
850 			struct tcm_qla2xxx_tpg, se_tpg);		\
851 	struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;		\
852 	unsigned long val;						\
853 	int ret;							\
854 									\
855 	ret = kstrtoul(page, 0, &val);					\
856 	if (ret < 0) {							\
857 		pr_err("kstrtoul() failed with"				\
858 				" ret: %d\n", ret);			\
859 		return -EINVAL;						\
860 	}								\
861 									\
862 	if ((val != 0) && (val != 1)) {					\
863 		pr_err("Illegal boolean value %lu\n", val);		\
864 		return -EINVAL;						\
865 	}								\
866 									\
867 	a->name = val;							\
868 									\
869 	return count;							\
870 }									\
871 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
872 
873 DEF_QLA_TPG_ATTRIB(generate_node_acls);
874 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
875 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
876 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
877 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
878 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
879 DEF_QLA_TPG_ATTRIB(jam_host);
880 #endif
881 
882 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
883 	&tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
884 	&tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
885 	&tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
886 	&tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
887 	&tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
888 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
889 	&tcm_qla2xxx_tpg_attrib_attr_jam_host,
890 #endif
891 	NULL,
892 };
893 
894 /* End items for tcm_qla2xxx_tpg_attrib_cit */
895 
896 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
897 		char *page)
898 {
899 	struct se_portal_group *se_tpg = to_tpg(item);
900 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
901 			struct tcm_qla2xxx_tpg, se_tpg);
902 
903 	return snprintf(page, PAGE_SIZE, "%d\n",
904 			atomic_read(&tpg->lport_tpg_enabled));
905 }
906 
907 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
908 {
909 	struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
910 				struct tcm_qla2xxx_tpg, tpg_base_work);
911 	struct se_portal_group *se_tpg = &base_tpg->se_tpg;
912 	struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
913 
914 	if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
915 		atomic_set(&base_tpg->lport_tpg_enabled, 1);
916 		qlt_enable_vha(base_vha);
917 	}
918 	complete(&base_tpg->tpg_base_comp);
919 }
920 
921 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
922 {
923 	struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
924 				struct tcm_qla2xxx_tpg, tpg_base_work);
925 	struct se_portal_group *se_tpg = &base_tpg->se_tpg;
926 	struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
927 
928 	if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
929 		atomic_set(&base_tpg->lport_tpg_enabled, 0);
930 		target_undepend_item(&se_tpg->tpg_group.cg_item);
931 	}
932 	complete(&base_tpg->tpg_base_comp);
933 }
934 
935 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
936 		const char *page, size_t count)
937 {
938 	struct se_portal_group *se_tpg = to_tpg(item);
939 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
940 			struct tcm_qla2xxx_tpg, se_tpg);
941 	unsigned long op;
942 	int rc;
943 
944 	rc = kstrtoul(page, 0, &op);
945 	if (rc < 0) {
946 		pr_err("kstrtoul() returned %d\n", rc);
947 		return -EINVAL;
948 	}
949 	if ((op != 1) && (op != 0)) {
950 		pr_err("Illegal value for tpg_enable: %lu\n", op);
951 		return -EINVAL;
952 	}
953 	if (op) {
954 		if (atomic_read(&tpg->lport_tpg_enabled))
955 			return -EEXIST;
956 
957 		INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
958 	} else {
959 		if (!atomic_read(&tpg->lport_tpg_enabled))
960 			return count;
961 
962 		INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
963 	}
964 	init_completion(&tpg->tpg_base_comp);
965 	schedule_work(&tpg->tpg_base_work);
966 	wait_for_completion(&tpg->tpg_base_comp);
967 
968 	if (op) {
969 		if (!atomic_read(&tpg->lport_tpg_enabled))
970 			return -ENODEV;
971 	} else {
972 		if (atomic_read(&tpg->lport_tpg_enabled))
973 			return -EPERM;
974 	}
975 	return count;
976 }
977 
978 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
979 		char *page)
980 {
981 	return target_show_dynamic_sessions(to_tpg(item), page);
982 }
983 
984 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
985 		const char *page, size_t count)
986 {
987 	struct se_portal_group *se_tpg = to_tpg(item);
988 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
989 				struct tcm_qla2xxx_tpg, se_tpg);
990 	unsigned long val;
991 	int ret = kstrtoul(page, 0, &val);
992 
993 	if (ret) {
994 		pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
995 		return ret;
996 	}
997 	if (val != 0 && val != 1 && val != 3) {
998 		pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
999 		return -EINVAL;
1000 	}
1001 	tpg->tpg_attrib.fabric_prot_type = val;
1002 
1003 	return count;
1004 }
1005 
1006 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
1007 		char *page)
1008 {
1009 	struct se_portal_group *se_tpg = to_tpg(item);
1010 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1011 				struct tcm_qla2xxx_tpg, se_tpg);
1012 
1013 	return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1014 }
1015 
1016 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1017 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1018 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1019 
1020 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1021 	&tcm_qla2xxx_tpg_attr_enable,
1022 	&tcm_qla2xxx_tpg_attr_dynamic_sessions,
1023 	&tcm_qla2xxx_tpg_attr_fabric_prot_type,
1024 	NULL,
1025 };
1026 
1027 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1028 	struct se_wwn *wwn,
1029 	struct config_group *group,
1030 	const char *name)
1031 {
1032 	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1033 			struct tcm_qla2xxx_lport, lport_wwn);
1034 	struct tcm_qla2xxx_tpg *tpg;
1035 	unsigned long tpgt;
1036 	int ret;
1037 
1038 	if (strstr(name, "tpgt_") != name)
1039 		return ERR_PTR(-EINVAL);
1040 	if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1041 		return ERR_PTR(-EINVAL);
1042 
1043 	if ((tpgt != 1)) {
1044 		pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1045 		return ERR_PTR(-ENOSYS);
1046 	}
1047 
1048 	tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1049 	if (!tpg) {
1050 		pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1051 		return ERR_PTR(-ENOMEM);
1052 	}
1053 	tpg->lport = lport;
1054 	tpg->lport_tpgt = tpgt;
1055 	/*
1056 	 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1057 	 * NodeACLs
1058 	 */
1059 	tpg->tpg_attrib.generate_node_acls = 1;
1060 	tpg->tpg_attrib.demo_mode_write_protect = 1;
1061 	tpg->tpg_attrib.cache_dynamic_acls = 1;
1062 	tpg->tpg_attrib.demo_mode_login_only = 1;
1063 	tpg->tpg_attrib.jam_host = 0;
1064 
1065 	ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1066 	if (ret < 0) {
1067 		kfree(tpg);
1068 		return NULL;
1069 	}
1070 
1071 	lport->tpg_1 = tpg;
1072 
1073 	return &tpg->se_tpg;
1074 }
1075 
1076 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1077 {
1078 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1079 			struct tcm_qla2xxx_tpg, se_tpg);
1080 	struct tcm_qla2xxx_lport *lport = tpg->lport;
1081 	struct scsi_qla_host *vha = lport->qla_vha;
1082 	/*
1083 	 * Call into qla2x_target.c LLD logic to shutdown the active
1084 	 * FC Nexuses and disable target mode operation for this qla_hw_data
1085 	 */
1086 	if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1087 		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1088 
1089 	core_tpg_deregister(se_tpg);
1090 	/*
1091 	 * Clear local TPG=1 pointer for non NPIV mode.
1092 	 */
1093 	lport->tpg_1 = NULL;
1094 	kfree(tpg);
1095 }
1096 
1097 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1098 		char *page)
1099 {
1100 	return tcm_qla2xxx_tpg_enable_show(item, page);
1101 }
1102 
1103 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1104 		const char *page, size_t count)
1105 {
1106 	struct se_portal_group *se_tpg = to_tpg(item);
1107 	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1108 	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1109 			struct tcm_qla2xxx_lport, lport_wwn);
1110 	struct scsi_qla_host *vha = lport->qla_vha;
1111 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1112 			struct tcm_qla2xxx_tpg, se_tpg);
1113 	unsigned long op;
1114 	int rc;
1115 
1116 	rc = kstrtoul(page, 0, &op);
1117 	if (rc < 0) {
1118 		pr_err("kstrtoul() returned %d\n", rc);
1119 		return -EINVAL;
1120 	}
1121 	if ((op != 1) && (op != 0)) {
1122 		pr_err("Illegal value for tpg_enable: %lu\n", op);
1123 		return -EINVAL;
1124 	}
1125 	if (op) {
1126 		if (atomic_read(&tpg->lport_tpg_enabled))
1127 			return -EEXIST;
1128 
1129 		atomic_set(&tpg->lport_tpg_enabled, 1);
1130 		qlt_enable_vha(vha);
1131 	} else {
1132 		if (!atomic_read(&tpg->lport_tpg_enabled))
1133 			return count;
1134 
1135 		atomic_set(&tpg->lport_tpg_enabled, 0);
1136 		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1137 	}
1138 
1139 	return count;
1140 }
1141 
1142 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1143 
1144 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1145         &tcm_qla2xxx_npiv_tpg_attr_enable,
1146         NULL,
1147 };
1148 
1149 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1150 	struct se_wwn *wwn,
1151 	struct config_group *group,
1152 	const char *name)
1153 {
1154 	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1155 			struct tcm_qla2xxx_lport, lport_wwn);
1156 	struct tcm_qla2xxx_tpg *tpg;
1157 	unsigned long tpgt;
1158 	int ret;
1159 
1160 	if (strstr(name, "tpgt_") != name)
1161 		return ERR_PTR(-EINVAL);
1162 	if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1163 		return ERR_PTR(-EINVAL);
1164 
1165 	tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1166 	if (!tpg) {
1167 		pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1168 		return ERR_PTR(-ENOMEM);
1169 	}
1170 	tpg->lport = lport;
1171 	tpg->lport_tpgt = tpgt;
1172 
1173 	/*
1174 	 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1175 	 * NodeACLs
1176 	 */
1177 	tpg->tpg_attrib.generate_node_acls = 1;
1178 	tpg->tpg_attrib.demo_mode_write_protect = 1;
1179 	tpg->tpg_attrib.cache_dynamic_acls = 1;
1180 	tpg->tpg_attrib.demo_mode_login_only = 1;
1181 
1182 	ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1183 	if (ret < 0) {
1184 		kfree(tpg);
1185 		return NULL;
1186 	}
1187 	lport->tpg_1 = tpg;
1188 	return &tpg->se_tpg;
1189 }
1190 
1191 /*
1192  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1193  */
1194 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1195 	scsi_qla_host_t *vha,
1196 	const uint8_t *s_id)
1197 {
1198 	struct tcm_qla2xxx_lport *lport;
1199 	struct se_node_acl *se_nacl;
1200 	struct tcm_qla2xxx_nacl *nacl;
1201 	u32 key;
1202 
1203 	lport = vha->vha_tgt.target_lport_ptr;
1204 	if (!lport) {
1205 		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1206 		dump_stack();
1207 		return NULL;
1208 	}
1209 
1210 	key = sid_to_key(s_id);
1211 	pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1212 
1213 	se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1214 	if (!se_nacl) {
1215 		pr_debug("Unable to locate s_id: 0x%06x\n", key);
1216 		return NULL;
1217 	}
1218 	pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1219 	    se_nacl, se_nacl->initiatorname);
1220 
1221 	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1222 	if (!nacl->fc_port) {
1223 		pr_err("Unable to locate struct fc_port\n");
1224 		return NULL;
1225 	}
1226 
1227 	return nacl->fc_port;
1228 }
1229 
1230 /*
1231  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1232  */
1233 static void tcm_qla2xxx_set_sess_by_s_id(
1234 	struct tcm_qla2xxx_lport *lport,
1235 	struct se_node_acl *new_se_nacl,
1236 	struct tcm_qla2xxx_nacl *nacl,
1237 	struct se_session *se_sess,
1238 	struct fc_port *fc_port,
1239 	uint8_t *s_id)
1240 {
1241 	u32 key;
1242 	void *slot;
1243 	int rc;
1244 
1245 	key = sid_to_key(s_id);
1246 	pr_debug("set_sess_by_s_id: %06x\n", key);
1247 
1248 	slot = btree_lookup32(&lport->lport_fcport_map, key);
1249 	if (!slot) {
1250 		if (new_se_nacl) {
1251 			pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1252 			nacl->nport_id = key;
1253 			rc = btree_insert32(&lport->lport_fcport_map, key,
1254 					new_se_nacl, GFP_ATOMIC);
1255 			if (rc)
1256 				printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1257 				    (int)key);
1258 		} else {
1259 			pr_debug("Wiping nonexisting fc_port entry\n");
1260 		}
1261 
1262 		fc_port->se_sess = se_sess;
1263 		nacl->fc_port = fc_port;
1264 		return;
1265 	}
1266 
1267 	if (nacl->fc_port) {
1268 		if (new_se_nacl == NULL) {
1269 			pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1270 			btree_remove32(&lport->lport_fcport_map, key);
1271 			nacl->fc_port = NULL;
1272 			return;
1273 		}
1274 		pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1275 		btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1276 		fc_port->se_sess = se_sess;
1277 		nacl->fc_port = fc_port;
1278 		return;
1279 	}
1280 
1281 	if (new_se_nacl == NULL) {
1282 		pr_debug("Clearing existing fc_port entry\n");
1283 		btree_remove32(&lport->lport_fcport_map, key);
1284 		return;
1285 	}
1286 
1287 	pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1288 	btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1289 	fc_port->se_sess = se_sess;
1290 	nacl->fc_port = fc_port;
1291 
1292 	pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1293 	    nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1294 }
1295 
1296 /*
1297  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1298  */
1299 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1300 	scsi_qla_host_t *vha,
1301 	const uint16_t loop_id)
1302 {
1303 	struct tcm_qla2xxx_lport *lport;
1304 	struct se_node_acl *se_nacl;
1305 	struct tcm_qla2xxx_nacl *nacl;
1306 	struct tcm_qla2xxx_fc_loopid *fc_loopid;
1307 
1308 	lport = vha->vha_tgt.target_lport_ptr;
1309 	if (!lport) {
1310 		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1311 		dump_stack();
1312 		return NULL;
1313 	}
1314 
1315 	pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1316 
1317 	fc_loopid = lport->lport_loopid_map + loop_id;
1318 	se_nacl = fc_loopid->se_nacl;
1319 	if (!se_nacl) {
1320 		pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1321 		    loop_id);
1322 		return NULL;
1323 	}
1324 
1325 	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1326 
1327 	if (!nacl->fc_port) {
1328 		pr_err("Unable to locate struct fc_port\n");
1329 		return NULL;
1330 	}
1331 
1332 	return nacl->fc_port;
1333 }
1334 
1335 /*
1336  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1337  */
1338 static void tcm_qla2xxx_set_sess_by_loop_id(
1339 	struct tcm_qla2xxx_lport *lport,
1340 	struct se_node_acl *new_se_nacl,
1341 	struct tcm_qla2xxx_nacl *nacl,
1342 	struct se_session *se_sess,
1343 	struct fc_port *fc_port,
1344 	uint16_t loop_id)
1345 {
1346 	struct se_node_acl *saved_nacl;
1347 	struct tcm_qla2xxx_fc_loopid *fc_loopid;
1348 
1349 	pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1350 
1351 	fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1352 			lport->lport_loopid_map)[loop_id];
1353 
1354 	saved_nacl = fc_loopid->se_nacl;
1355 	if (!saved_nacl) {
1356 		pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1357 		fc_loopid->se_nacl = new_se_nacl;
1358 		if (fc_port->se_sess != se_sess)
1359 			fc_port->se_sess = se_sess;
1360 		if (nacl->fc_port != fc_port)
1361 			nacl->fc_port = fc_port;
1362 		return;
1363 	}
1364 
1365 	if (nacl->fc_port) {
1366 		if (new_se_nacl == NULL) {
1367 			pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1368 			fc_loopid->se_nacl = NULL;
1369 			nacl->fc_port = NULL;
1370 			return;
1371 		}
1372 
1373 		pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1374 		fc_loopid->se_nacl = new_se_nacl;
1375 		if (fc_port->se_sess != se_sess)
1376 			fc_port->se_sess = se_sess;
1377 		if (nacl->fc_port != fc_port)
1378 			nacl->fc_port = fc_port;
1379 		return;
1380 	}
1381 
1382 	if (new_se_nacl == NULL) {
1383 		pr_debug("Clearing fc_loopid->se_nacl\n");
1384 		fc_loopid->se_nacl = NULL;
1385 		return;
1386 	}
1387 
1388 	pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1389 	fc_loopid->se_nacl = new_se_nacl;
1390 	if (fc_port->se_sess != se_sess)
1391 		fc_port->se_sess = se_sess;
1392 	if (nacl->fc_port != fc_port)
1393 		nacl->fc_port = fc_port;
1394 
1395 	pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1396 	    nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1397 }
1398 
1399 /*
1400  * Should always be called with qla_hw_data->tgt.sess_lock held.
1401  */
1402 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1403 		struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1404 {
1405 	struct se_session *se_sess = sess->se_sess;
1406 	unsigned char be_sid[3];
1407 
1408 	be_sid[0] = sess->d_id.b.domain;
1409 	be_sid[1] = sess->d_id.b.area;
1410 	be_sid[2] = sess->d_id.b.al_pa;
1411 
1412 	tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1413 				sess, be_sid);
1414 	tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1415 				sess, sess->loop_id);
1416 }
1417 
1418 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1419 {
1420 	struct qla_tgt *tgt = sess->tgt;
1421 	struct qla_hw_data *ha = tgt->ha;
1422 	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1423 	struct se_session *se_sess;
1424 	struct tcm_qla2xxx_lport *lport;
1425 
1426 	BUG_ON(in_interrupt());
1427 
1428 	se_sess = sess->se_sess;
1429 	if (!se_sess) {
1430 		pr_err("struct fc_port->se_sess is NULL\n");
1431 		dump_stack();
1432 		return;
1433 	}
1434 
1435 	lport = vha->vha_tgt.target_lport_ptr;
1436 	if (!lport) {
1437 		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1438 		dump_stack();
1439 		return;
1440 	}
1441 	target_wait_for_sess_cmds(se_sess);
1442 
1443 	transport_deregister_session_configfs(sess->se_sess);
1444 	transport_deregister_session(sess->se_sess);
1445 }
1446 
1447 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1448 				  struct se_session *se_sess, void *p)
1449 {
1450 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1451 				struct tcm_qla2xxx_tpg, se_tpg);
1452 	struct tcm_qla2xxx_lport *lport = tpg->lport;
1453 	struct qla_hw_data *ha = lport->qla_vha->hw;
1454 	struct se_node_acl *se_nacl = se_sess->se_node_acl;
1455 	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1456 				struct tcm_qla2xxx_nacl, se_node_acl);
1457 	struct fc_port *qlat_sess = p;
1458 	uint16_t loop_id = qlat_sess->loop_id;
1459 	unsigned long flags;
1460 	unsigned char be_sid[3];
1461 
1462 	be_sid[0] = qlat_sess->d_id.b.domain;
1463 	be_sid[1] = qlat_sess->d_id.b.area;
1464 	be_sid[2] = qlat_sess->d_id.b.al_pa;
1465 
1466 	/*
1467 	 * And now setup se_nacl and session pointers into HW lport internal
1468 	 * mappings for fabric S_ID and LOOP_ID.
1469 	 */
1470 	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1471 	tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1472 				     se_sess, qlat_sess, be_sid);
1473 	tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1474 					se_sess, qlat_sess, loop_id);
1475 	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1476 
1477 	return 0;
1478 }
1479 
1480 /*
1481  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1482  * to locate struct se_node_acl
1483  */
1484 static int tcm_qla2xxx_check_initiator_node_acl(
1485 	scsi_qla_host_t *vha,
1486 	unsigned char *fc_wwpn,
1487 	struct fc_port *qlat_sess)
1488 {
1489 	struct qla_hw_data *ha = vha->hw;
1490 	struct tcm_qla2xxx_lport *lport;
1491 	struct tcm_qla2xxx_tpg *tpg;
1492 	struct se_session *se_sess;
1493 	unsigned char port_name[36];
1494 	int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1495 		       TCM_QLA2XXX_DEFAULT_TAGS;
1496 
1497 	lport = vha->vha_tgt.target_lport_ptr;
1498 	if (!lport) {
1499 		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1500 		dump_stack();
1501 		return -EINVAL;
1502 	}
1503 	/*
1504 	 * Locate the TPG=1 reference..
1505 	 */
1506 	tpg = lport->tpg_1;
1507 	if (!tpg) {
1508 		pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1509 		return -EINVAL;
1510 	}
1511 	/*
1512 	 * Format the FCP Initiator port_name into colon seperated values to
1513 	 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1514 	 */
1515 	memset(&port_name, 0, 36);
1516 	snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1517 	/*
1518 	 * Locate our struct se_node_acl either from an explict NodeACL created
1519 	 * via ConfigFS, or via running in TPG demo mode.
1520 	 */
1521 	se_sess = target_alloc_session(&tpg->se_tpg, num_tags,
1522 				       sizeof(struct qla_tgt_cmd),
1523 				       TARGET_PROT_ALL, port_name,
1524 				       qlat_sess, tcm_qla2xxx_session_cb);
1525 	if (IS_ERR(se_sess))
1526 		return PTR_ERR(se_sess);
1527 
1528 	return 0;
1529 }
1530 
1531 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1532 				    uint16_t loop_id, bool conf_compl_supported)
1533 {
1534 	struct qla_tgt *tgt = sess->tgt;
1535 	struct qla_hw_data *ha = tgt->ha;
1536 	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1537 	struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1538 	struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1539 	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1540 			struct tcm_qla2xxx_nacl, se_node_acl);
1541 	u32 key;
1542 
1543 
1544 	if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1545 		pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1546 		    sess, sess->port_name,
1547 		    sess->loop_id, loop_id, sess->d_id.b.domain,
1548 		    sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1549 		    s_id.b.area, s_id.b.al_pa);
1550 
1551 	if (sess->loop_id != loop_id) {
1552 		/*
1553 		 * Because we can shuffle loop IDs around and we
1554 		 * update different sessions non-atomically, we might
1555 		 * have overwritten this session's old loop ID
1556 		 * already, and we might end up overwriting some other
1557 		 * session that will be updated later.  So we have to
1558 		 * be extra careful and we can't warn about those things...
1559 		 */
1560 		if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1561 			lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1562 
1563 		lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1564 
1565 		sess->loop_id = loop_id;
1566 	}
1567 
1568 	if (sess->d_id.b24 != s_id.b24) {
1569 		key = (((u32) sess->d_id.b.domain << 16) |
1570 		       ((u32) sess->d_id.b.area   <<  8) |
1571 		       ((u32) sess->d_id.b.al_pa));
1572 
1573 		if (btree_lookup32(&lport->lport_fcport_map, key))
1574 			WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1575 			    se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1576 			    sess->d_id.b.domain, sess->d_id.b.area,
1577 			    sess->d_id.b.al_pa);
1578 		else
1579 			WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1580 			     sess->d_id.b.domain, sess->d_id.b.area,
1581 			     sess->d_id.b.al_pa);
1582 
1583 		key = (((u32) s_id.b.domain << 16) |
1584 		       ((u32) s_id.b.area   <<  8) |
1585 		       ((u32) s_id.b.al_pa));
1586 
1587 		if (btree_lookup32(&lport->lport_fcport_map, key)) {
1588 			WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1589 			     s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1590 			btree_update32(&lport->lport_fcport_map, key, se_nacl);
1591 		} else {
1592 			btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1593 			    GFP_ATOMIC);
1594 		}
1595 
1596 		sess->d_id = s_id;
1597 		nacl->nport_id = key;
1598 	}
1599 
1600 	sess->conf_compl_supported = conf_compl_supported;
1601 
1602 	/* Reset logout parameters to default */
1603 	sess->logout_on_delete = 1;
1604 	sess->keep_nport_handle = 0;
1605 }
1606 
1607 /*
1608  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1609  */
1610 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1611 	.handle_cmd		= tcm_qla2xxx_handle_cmd,
1612 	.handle_data		= tcm_qla2xxx_handle_data,
1613 	.handle_tmr		= tcm_qla2xxx_handle_tmr,
1614 	.free_cmd		= tcm_qla2xxx_free_cmd,
1615 	.free_mcmd		= tcm_qla2xxx_free_mcmd,
1616 	.free_session		= tcm_qla2xxx_free_session,
1617 	.update_sess		= tcm_qla2xxx_update_sess,
1618 	.check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1619 	.find_sess_by_s_id	= tcm_qla2xxx_find_sess_by_s_id,
1620 	.find_sess_by_loop_id	= tcm_qla2xxx_find_sess_by_loop_id,
1621 	.clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1622 	.put_sess		= tcm_qla2xxx_put_sess,
1623 	.shutdown_sess		= tcm_qla2xxx_shutdown_sess,
1624 	.get_dif_tags		= tcm_qla2xxx_dif_tags,
1625 	.chk_dif_tags		= tcm_qla2xxx_chk_dif_tags,
1626 };
1627 
1628 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1629 {
1630 	int rc;
1631 
1632 	rc = btree_init32(&lport->lport_fcport_map);
1633 	if (rc) {
1634 		pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1635 		return rc;
1636 	}
1637 
1638 	lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1639 				65536);
1640 	if (!lport->lport_loopid_map) {
1641 		pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1642 		    sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1643 		btree_destroy32(&lport->lport_fcport_map);
1644 		return -ENOMEM;
1645 	}
1646 	memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1647 	       * 65536);
1648 	pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1649 	       sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1650 	return 0;
1651 }
1652 
1653 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1654 					 void *target_lport_ptr,
1655 					 u64 npiv_wwpn, u64 npiv_wwnn)
1656 {
1657 	struct qla_hw_data *ha = vha->hw;
1658 	struct tcm_qla2xxx_lport *lport =
1659 			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1660 	/*
1661 	 * Setup tgt_ops, local pointer to vha and target_lport_ptr
1662 	 */
1663 	ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1664 	vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1665 	lport->qla_vha = vha;
1666 
1667 	return 0;
1668 }
1669 
1670 static struct se_wwn *tcm_qla2xxx_make_lport(
1671 	struct target_fabric_configfs *tf,
1672 	struct config_group *group,
1673 	const char *name)
1674 {
1675 	struct tcm_qla2xxx_lport *lport;
1676 	u64 wwpn;
1677 	int ret = -ENODEV;
1678 
1679 	if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1680 		return ERR_PTR(-EINVAL);
1681 
1682 	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1683 	if (!lport) {
1684 		pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1685 		return ERR_PTR(-ENOMEM);
1686 	}
1687 	lport->lport_wwpn = wwpn;
1688 	tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1689 				wwpn);
1690 	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1691 
1692 	ret = tcm_qla2xxx_init_lport(lport);
1693 	if (ret != 0)
1694 		goto out;
1695 
1696 	ret = qlt_lport_register(lport, wwpn, 0, 0,
1697 				 tcm_qla2xxx_lport_register_cb);
1698 	if (ret != 0)
1699 		goto out_lport;
1700 
1701 	return &lport->lport_wwn;
1702 out_lport:
1703 	vfree(lport->lport_loopid_map);
1704 	btree_destroy32(&lport->lport_fcport_map);
1705 out:
1706 	kfree(lport);
1707 	return ERR_PTR(ret);
1708 }
1709 
1710 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1711 {
1712 	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1713 			struct tcm_qla2xxx_lport, lport_wwn);
1714 	struct scsi_qla_host *vha = lport->qla_vha;
1715 	struct se_node_acl *node;
1716 	u32 key = 0;
1717 
1718 	/*
1719 	 * Call into qla2x_target.c LLD logic to complete the
1720 	 * shutdown of struct qla_tgt after the call to
1721 	 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1722 	 */
1723 	if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1724 		qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1725 
1726 	qlt_lport_deregister(vha);
1727 
1728 	vfree(lport->lport_loopid_map);
1729 	btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1730 		btree_remove32(&lport->lport_fcport_map, key);
1731 	btree_destroy32(&lport->lport_fcport_map);
1732 	kfree(lport);
1733 }
1734 
1735 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1736 					      void *target_lport_ptr,
1737 					      u64 npiv_wwpn, u64 npiv_wwnn)
1738 {
1739 	struct fc_vport *vport;
1740 	struct Scsi_Host *sh = base_vha->host;
1741 	struct scsi_qla_host *npiv_vha;
1742 	struct tcm_qla2xxx_lport *lport =
1743 			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1744 	struct tcm_qla2xxx_lport *base_lport =
1745 			(struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1746 	struct fc_vport_identifiers vport_id;
1747 
1748 	if (qla_ini_mode_enabled(base_vha)) {
1749 		pr_err("qla2xxx base_vha not enabled for target mode\n");
1750 		return -EPERM;
1751 	}
1752 
1753 	if (!base_lport || !base_lport->tpg_1 ||
1754 	    !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1755 		pr_err("qla2xxx base_lport or tpg_1 not available\n");
1756 		return -EPERM;
1757 	}
1758 
1759 	memset(&vport_id, 0, sizeof(vport_id));
1760 	vport_id.port_name = npiv_wwpn;
1761 	vport_id.node_name = npiv_wwnn;
1762 	vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1763 	vport_id.vport_type = FC_PORTTYPE_NPIV;
1764 	vport_id.disable = false;
1765 
1766 	vport = fc_vport_create(sh, 0, &vport_id);
1767 	if (!vport) {
1768 		pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1769 		return -ENODEV;
1770 	}
1771 	/*
1772 	 * Setup local pointer to NPIV vhba + target_lport_ptr
1773 	 */
1774 	npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1775 	npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1776 	lport->qla_vha = npiv_vha;
1777 	scsi_host_get(npiv_vha->host);
1778 	return 0;
1779 }
1780 
1781 
1782 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1783 	struct target_fabric_configfs *tf,
1784 	struct config_group *group,
1785 	const char *name)
1786 {
1787 	struct tcm_qla2xxx_lport *lport;
1788 	u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1789 	char *p, tmp[128];
1790 	int ret;
1791 
1792 	snprintf(tmp, 128, "%s", name);
1793 
1794 	p = strchr(tmp, '@');
1795 	if (!p) {
1796 		pr_err("Unable to locate NPIV '@' separator\n");
1797 		return ERR_PTR(-EINVAL);
1798 	}
1799 	*p++ = '\0';
1800 
1801 	if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1802 		return ERR_PTR(-EINVAL);
1803 
1804 	if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1805 				       &npiv_wwpn, &npiv_wwnn) < 0)
1806 		return ERR_PTR(-EINVAL);
1807 
1808 	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1809 	if (!lport) {
1810 		pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1811 		return ERR_PTR(-ENOMEM);
1812 	}
1813 	lport->lport_npiv_wwpn = npiv_wwpn;
1814 	lport->lport_npiv_wwnn = npiv_wwnn;
1815 	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1816 
1817 	ret = tcm_qla2xxx_init_lport(lport);
1818 	if (ret != 0)
1819 		goto out;
1820 
1821 	ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1822 				 tcm_qla2xxx_lport_register_npiv_cb);
1823 	if (ret != 0)
1824 		goto out_lport;
1825 
1826 	return &lport->lport_wwn;
1827 out_lport:
1828 	vfree(lport->lport_loopid_map);
1829 	btree_destroy32(&lport->lport_fcport_map);
1830 out:
1831 	kfree(lport);
1832 	return ERR_PTR(ret);
1833 }
1834 
1835 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1836 {
1837 	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1838 			struct tcm_qla2xxx_lport, lport_wwn);
1839 	struct scsi_qla_host *npiv_vha = lport->qla_vha;
1840 	struct qla_hw_data *ha = npiv_vha->hw;
1841 	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1842 
1843 	scsi_host_put(npiv_vha->host);
1844 	/*
1845 	 * Notify libfc that we want to release the vha->fc_vport
1846 	 */
1847 	fc_vport_terminate(npiv_vha->fc_vport);
1848 	scsi_host_put(base_vha->host);
1849 	kfree(lport);
1850 }
1851 
1852 
1853 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1854 		char *page)
1855 {
1856 	return sprintf(page,
1857 	    "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1858 	    QLA2XXX_VERSION, utsname()->sysname,
1859 	    utsname()->machine, utsname()->release);
1860 }
1861 
1862 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1863 
1864 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1865 	&tcm_qla2xxx_wwn_attr_version,
1866 	NULL,
1867 };
1868 
1869 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1870 	.module				= THIS_MODULE,
1871 	.name				= "qla2xxx",
1872 	.node_acl_size			= sizeof(struct tcm_qla2xxx_nacl),
1873 	/*
1874 	 * XXX: Limit assumes single page per scatter-gather-list entry.
1875 	 * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1876 	 */
1877 	.max_data_sg_nents		= 1200,
1878 	.get_fabric_name		= tcm_qla2xxx_get_fabric_name,
1879 	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
1880 	.tpg_get_tag			= tcm_qla2xxx_get_tag,
1881 	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
1882 	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
1883 	.tpg_check_demo_mode_write_protect =
1884 					tcm_qla2xxx_check_demo_write_protect,
1885 	.tpg_check_prod_mode_write_protect =
1886 					tcm_qla2xxx_check_prod_write_protect,
1887 	.tpg_check_prot_fabric_only	= tcm_qla2xxx_check_prot_fabric_only,
1888 	.tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1889 	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
1890 	.check_stop_free		= tcm_qla2xxx_check_stop_free,
1891 	.release_cmd			= tcm_qla2xxx_release_cmd,
1892 	.close_session			= tcm_qla2xxx_close_session,
1893 	.sess_get_index			= tcm_qla2xxx_sess_get_index,
1894 	.sess_get_initiator_sid		= NULL,
1895 	.write_pending			= tcm_qla2xxx_write_pending,
1896 	.write_pending_status		= tcm_qla2xxx_write_pending_status,
1897 	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
1898 	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
1899 	.queue_data_in			= tcm_qla2xxx_queue_data_in,
1900 	.queue_status			= tcm_qla2xxx_queue_status,
1901 	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
1902 	.aborted_task			= tcm_qla2xxx_aborted_task,
1903 	/*
1904 	 * Setup function pointers for generic logic in
1905 	 * target_core_fabric_configfs.c
1906 	 */
1907 	.fabric_make_wwn		= tcm_qla2xxx_make_lport,
1908 	.fabric_drop_wwn		= tcm_qla2xxx_drop_lport,
1909 	.fabric_make_tpg		= tcm_qla2xxx_make_tpg,
1910 	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
1911 	.fabric_init_nodeacl		= tcm_qla2xxx_init_nodeacl,
1912 
1913 	.tfc_wwn_attrs			= tcm_qla2xxx_wwn_attrs,
1914 	.tfc_tpg_base_attrs		= tcm_qla2xxx_tpg_attrs,
1915 	.tfc_tpg_attrib_attrs		= tcm_qla2xxx_tpg_attrib_attrs,
1916 };
1917 
1918 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1919 	.module				= THIS_MODULE,
1920 	.name				= "qla2xxx_npiv",
1921 	.node_acl_size			= sizeof(struct tcm_qla2xxx_nacl),
1922 	.get_fabric_name		= tcm_qla2xxx_npiv_get_fabric_name,
1923 	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
1924 	.tpg_get_tag			= tcm_qla2xxx_get_tag,
1925 	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
1926 	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
1927 	.tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1928 	.tpg_check_prod_mode_write_protect =
1929 	    tcm_qla2xxx_check_prod_write_protect,
1930 	.tpg_check_demo_mode_login_only	= tcm_qla2xxx_check_demo_mode_login_only,
1931 	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
1932 	.check_stop_free                = tcm_qla2xxx_check_stop_free,
1933 	.release_cmd			= tcm_qla2xxx_release_cmd,
1934 	.close_session			= tcm_qla2xxx_close_session,
1935 	.sess_get_index			= tcm_qla2xxx_sess_get_index,
1936 	.sess_get_initiator_sid		= NULL,
1937 	.write_pending			= tcm_qla2xxx_write_pending,
1938 	.write_pending_status		= tcm_qla2xxx_write_pending_status,
1939 	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
1940 	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
1941 	.queue_data_in			= tcm_qla2xxx_queue_data_in,
1942 	.queue_status			= tcm_qla2xxx_queue_status,
1943 	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
1944 	.aborted_task			= tcm_qla2xxx_aborted_task,
1945 	/*
1946 	 * Setup function pointers for generic logic in
1947 	 * target_core_fabric_configfs.c
1948 	 */
1949 	.fabric_make_wwn		= tcm_qla2xxx_npiv_make_lport,
1950 	.fabric_drop_wwn		= tcm_qla2xxx_npiv_drop_lport,
1951 	.fabric_make_tpg		= tcm_qla2xxx_npiv_make_tpg,
1952 	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
1953 	.fabric_init_nodeacl		= tcm_qla2xxx_init_nodeacl,
1954 
1955 	.tfc_wwn_attrs			= tcm_qla2xxx_wwn_attrs,
1956 	.tfc_tpg_base_attrs		= tcm_qla2xxx_npiv_tpg_attrs,
1957 };
1958 
1959 static int tcm_qla2xxx_register_configfs(void)
1960 {
1961 	int ret;
1962 
1963 	pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1964 	    QLA2XXX_VERSION, utsname()->sysname,
1965 	    utsname()->machine, utsname()->release);
1966 
1967 	ret = target_register_template(&tcm_qla2xxx_ops);
1968 	if (ret)
1969 		return ret;
1970 
1971 	ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1972 	if (ret)
1973 		goto out_fabric;
1974 
1975 	tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1976 						WQ_MEM_RECLAIM, 0);
1977 	if (!tcm_qla2xxx_free_wq) {
1978 		ret = -ENOMEM;
1979 		goto out_fabric_npiv;
1980 	}
1981 
1982 	tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1983 	if (!tcm_qla2xxx_cmd_wq) {
1984 		ret = -ENOMEM;
1985 		goto out_free_wq;
1986 	}
1987 
1988 	return 0;
1989 
1990 out_free_wq:
1991 	destroy_workqueue(tcm_qla2xxx_free_wq);
1992 out_fabric_npiv:
1993 	target_unregister_template(&tcm_qla2xxx_npiv_ops);
1994 out_fabric:
1995 	target_unregister_template(&tcm_qla2xxx_ops);
1996 	return ret;
1997 }
1998 
1999 static void tcm_qla2xxx_deregister_configfs(void)
2000 {
2001 	destroy_workqueue(tcm_qla2xxx_cmd_wq);
2002 	destroy_workqueue(tcm_qla2xxx_free_wq);
2003 
2004 	target_unregister_template(&tcm_qla2xxx_ops);
2005 	target_unregister_template(&tcm_qla2xxx_npiv_ops);
2006 }
2007 
2008 static int __init tcm_qla2xxx_init(void)
2009 {
2010 	int ret;
2011 
2012 	ret = tcm_qla2xxx_register_configfs();
2013 	if (ret < 0)
2014 		return ret;
2015 
2016 	return 0;
2017 }
2018 
2019 static void __exit tcm_qla2xxx_exit(void)
2020 {
2021 	tcm_qla2xxx_deregister_configfs();
2022 }
2023 
2024 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2025 MODULE_LICENSE("GPL");
2026 module_init(tcm_qla2xxx_init);
2027 module_exit(tcm_qla2xxx_exit);
2028