tcm_qla2xxx.c

   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 <linux/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
  36static 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 */
  44static 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;
  81fail:
  82	pr_debug("err %u len %zu pos %u byte %u\n",
  83			err, cp - name, pos, byte);
  84	return -1;
  85}
  86
  87static 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 */
 100static 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 */
 131static 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
 162static 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
 171static 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
 178static 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
 186static 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
 194static 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
 202static 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
 210static 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
 218static 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
 226static 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
 234static 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 */
 247static 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
 255static void tcm_qla2xxx_complete_free(struct work_struct *work)
 256{
 257	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 258	unsigned long flags;
 259
 260	cmd->cmd_in_wq = 0;
 261
 262	WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 263
 264	/* To do: protect all tgt_counters manipulations with proper locking. */
 265	cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 266	cmd->trc_flags |= TRC_CMD_FREE;
 267	cmd->cmd_sent_to_fw = 0;
 268
 269	spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
 270	list_del_init(&cmd->sess_cmd_list);
 271	spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
 272
 273	transport_generic_free_cmd(&cmd->se_cmd, 0);
 274}
 275
 276static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess)
 277{
 278	struct se_session *se_sess = sess->se_sess;
 279	struct qla_tgt_cmd *cmd;
 280	int tag, cpu;
 281
 282	tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
 283	if (tag < 0)
 284		return NULL;
 285
 286	cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
 287	memset(cmd, 0, sizeof(struct qla_tgt_cmd));
 288	cmd->se_cmd.map_tag = tag;
 289	cmd->se_cmd.map_cpu = cpu;
 290
 291	return cmd;
 292}
 293
 294static int tcm_qla2xxx_get_cmd_ref(struct qla_tgt_cmd *cmd)
 295{
 296	return target_get_sess_cmd(&cmd->se_cmd, true);
 297}
 298
 299static void tcm_qla2xxx_put_cmd_ref(struct qla_tgt_cmd *cmd)
 300{
 301	target_put_sess_cmd(&cmd->se_cmd);
 302}
 303
 304static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
 305{
 306	target_free_tag(cmd->sess->se_sess, &cmd->se_cmd);
 307}
 308
 309/*
 310 * Called from qla_target_template->free_cmd(), and will call
 311 * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 312 * release callback.  qla_hw_data->hardware_lock is expected to be held
 313 */
 314static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 315{
 316	cmd->state = QLA_TGT_STATE_DONE;
 317
 318	cmd->qpair->tgt_counters.core_qla_free_cmd++;
 319	cmd->cmd_in_wq = 1;
 320
 321	WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 322	cmd->trc_flags |= TRC_CMD_DONE;
 323
 324	INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 325	queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 326}
 327
 328/*
 329 * Called from struct target_core_fabric_ops->check_stop_free() context
 330 */
 331static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 332{
 333	struct qla_tgt_cmd *cmd;
 334
 335	if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 336		cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 337		cmd->trc_flags |= TRC_CMD_CHK_STOP;
 338	}
 339
 340	return target_put_sess_cmd(se_cmd);
 341}
 342
 343/* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 344 * fabric descriptor @se_cmd command to release
 345 */
 346static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 347{
 348	struct qla_tgt_cmd *cmd;
 349
 350	if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 351		struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 352				struct qla_tgt_mgmt_cmd, se_cmd);
 353		qlt_free_mcmd(mcmd);
 354		return;
 355	}
 356	cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 357
 358	if (WARN_ON(cmd->cmd_sent_to_fw))
 359		return;
 360
 361	qlt_free_cmd(cmd);
 362}
 363
 364static void tcm_qla2xxx_release_session(struct kref *kref)
 365{
 366	struct fc_port  *sess = container_of(kref,
 367	    struct fc_port, sess_kref);
 368
 369	qlt_unreg_sess(sess);
 370}
 371
 372static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 373{
 374	if (!sess)
 375		return;
 376
 377	kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 378}
 379
 380static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 381{
 382	struct fc_port *sess = se_sess->fabric_sess_ptr;
 383
 384	BUG_ON(!sess);
 385
 386	target_stop_session(se_sess);
 387
 388	sess->explicit_logout = 1;
 389	tcm_qla2xxx_put_sess(sess);
 390}
 391
 392static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 393{
 394	struct qla_tgt_cmd *cmd = container_of(se_cmd,
 395				struct qla_tgt_cmd, se_cmd);
 396
 397	if (cmd->aborted) {
 398		/* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 399		 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 400		 * already kick start the free.
 401		 */
 402		pr_debug("write_pending aborted cmd[%p] refcount %d "
 403			"transport_state %x, t_state %x, se_cmd_flags %x\n",
 404			cmd, kref_read(&cmd->se_cmd.cmd_kref),
 405			cmd->se_cmd.transport_state,
 406			cmd->se_cmd.t_state,
 407			cmd->se_cmd.se_cmd_flags);
 408		transport_generic_request_failure(&cmd->se_cmd,
 409			TCM_CHECK_CONDITION_ABORT_CMD);
 410		return 0;
 411	}
 412	cmd->trc_flags |= TRC_XFR_RDY;
 413	cmd->bufflen = se_cmd->data_length;
 414	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 415
 416	cmd->sg_cnt = se_cmd->t_data_nents;
 417	cmd->sg = se_cmd->t_data_sg;
 418
 419	cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 420	cmd->prot_sg = se_cmd->t_prot_sg;
 421	cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 422	se_cmd->pi_err = 0;
 423
 424	/*
 425	 * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
 426	 * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 427	 */
 428	return qlt_rdy_to_xfer(cmd);
 429}
 430
 431static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 432{
 433	if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 434		struct qla_tgt_cmd *cmd = container_of(se_cmd,
 435				struct qla_tgt_cmd, se_cmd);
 436		return cmd->state;
 437	}
 438
 439	return 0;
 440}
 441
 442/*
 443 * Called from process context in qla_target.c:qlt_do_work() code
 444 */
 445static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 446	unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 447	int data_dir, int bidi)
 448{
 449	struct se_cmd *se_cmd = &cmd->se_cmd;
 450	struct se_session *se_sess;
 451	struct fc_port *sess;
 452#ifdef CONFIG_TCM_QLA2XXX_DEBUG
 453	struct se_portal_group *se_tpg;
 454	struct tcm_qla2xxx_tpg *tpg;
 455#endif
 456	int rc, target_flags = TARGET_SCF_ACK_KREF;
 457	unsigned long flags;
 458
 459	if (bidi)
 460		target_flags |= TARGET_SCF_BIDI_OP;
 461
 462	if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 463		target_flags |= TARGET_SCF_USE_CPUID;
 464
 465	sess = cmd->sess;
 466	if (!sess) {
 467		pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 468		return -EINVAL;
 469	}
 470
 471	se_sess = sess->se_sess;
 472	if (!se_sess) {
 473		pr_err("Unable to locate active struct se_session\n");
 474		return -EINVAL;
 475	}
 476
 477#ifdef CONFIG_TCM_QLA2XXX_DEBUG
 478	se_tpg = se_sess->se_tpg;
 479	tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 480	if (unlikely(tpg->tpg_attrib.jam_host)) {
 481		/* return, and dont run target_submit_cmd,discarding command */
 482		return 0;
 483	}
 484#endif
 485	cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 486
 487	spin_lock_irqsave(&sess->sess_cmd_lock, flags);
 488	list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list);
 489	spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
 490
 491	rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0],
 492			     cmd->unpacked_lun, data_length, fcp_task_attr,
 493			     data_dir, target_flags);
 494	if (rc)
 495		return rc;
 496
 497	if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0,
 498			       GFP_KERNEL))
 499		return 0;
 500
 501	target_submit(se_cmd);
 502	return 0;
 503}
 504
 505static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 506{
 507	struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 508
 509	/*
 510	 * Ensure that the complete FCP WRITE payload has been received.
 511	 * Otherwise return an exception via CHECK_CONDITION status.
 512	 */
 513	cmd->cmd_in_wq = 0;
 514	cmd->cmd_sent_to_fw = 0;
 515	if (cmd->aborted) {
 516		transport_generic_request_failure(&cmd->se_cmd,
 517			TCM_CHECK_CONDITION_ABORT_CMD);
 518		return;
 519	}
 520
 521	cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 522	if (!cmd->write_data_transferred) {
 523		switch (cmd->dif_err_code) {
 524		case DIF_ERR_GRD:
 525			cmd->se_cmd.pi_err =
 526			    TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 527			break;
 528		case DIF_ERR_REF:
 529			cmd->se_cmd.pi_err =
 530			    TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 531			break;
 532		case DIF_ERR_APP:
 533			cmd->se_cmd.pi_err =
 534			    TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 535			break;
 536		case DIF_ERR_NONE:
 537		default:
 538			break;
 539		}
 540
 541		if (cmd->se_cmd.pi_err)
 542			transport_generic_request_failure(&cmd->se_cmd,
 543				cmd->se_cmd.pi_err);
 544		else if (cmd->srr_failed)
 545			transport_generic_request_failure(&cmd->se_cmd,
 546				TCM_SNACK_REJECTED);
 547		else
 548			transport_generic_request_failure(&cmd->se_cmd,
 549				TCM_CHECK_CONDITION_ABORT_CMD);
 550
 551		return;
 552	}
 553
 554	return target_execute_cmd(&cmd->se_cmd);
 555}
 556
 557/*
 558 * Called from qla_target.c:qlt_do_ctio_completion()
 559 */
 560static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 561{
 562	cmd->trc_flags |= TRC_DATA_IN;
 563	cmd->cmd_in_wq = 1;
 564	INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 565	queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 566}
 567
 568static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 569{
 570	return 0;
 571}
 572
 573static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 574    uint16_t *pfw_prot_opts)
 575{
 576	struct se_cmd *se_cmd = &cmd->se_cmd;
 577
 578	if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 579		*pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 580
 581	if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 582		*pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 583
 584	return 0;
 585}
 586
 587/*
 588 * Called from qla_target.c:qlt_issue_task_mgmt()
 589 */
 590static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 591	uint16_t tmr_func, uint32_t tag)
 592{
 593	struct fc_port *sess = mcmd->sess;
 594	struct se_cmd *se_cmd = &mcmd->se_cmd;
 595	int transl_tmr_func = 0;
 596
 597	switch (tmr_func) {
 598	case QLA_TGT_ABTS:
 599		pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 600		transl_tmr_func = TMR_ABORT_TASK;
 601		break;
 602	case QLA_TGT_2G_ABORT_TASK:
 603		pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 604		transl_tmr_func = TMR_ABORT_TASK;
 605		break;
 606	case QLA_TGT_CLEAR_ACA:
 607		pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 608		transl_tmr_func = TMR_CLEAR_ACA;
 609		break;
 610	case QLA_TGT_TARGET_RESET:
 611		pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 612		transl_tmr_func = TMR_TARGET_WARM_RESET;
 613		break;
 614	case QLA_TGT_LUN_RESET:
 615		pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 616		transl_tmr_func = TMR_LUN_RESET;
 617		break;
 618	case QLA_TGT_CLEAR_TS:
 619		pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 620		transl_tmr_func = TMR_CLEAR_TASK_SET;
 621		break;
 622	case QLA_TGT_ABORT_TS:
 623		pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 624		transl_tmr_func = TMR_ABORT_TASK_SET;
 625		break;
 626	default:
 627		pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 628		    sess->vha->host_no, tmr_func);
 629		return -ENOSYS;
 630	}
 631
 632	return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 633	    transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 634}
 635
 636static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
 637    uint64_t tag)
 638{
 639	struct qla_tgt_cmd *cmd;
 640	unsigned long flags;
 641
 642	if (!sess->se_sess)
 643		return NULL;
 644
 645	spin_lock_irqsave(&sess->sess_cmd_lock, flags);
 646	list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) {
 647		if (cmd->se_cmd.tag == tag)
 648			goto done;
 649	}
 650	cmd = NULL;
 651done:
 652	spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
 653
 654	return cmd;
 655}
 656
 657static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 658{
 659	struct qla_tgt_cmd *cmd = container_of(se_cmd,
 660				struct qla_tgt_cmd, se_cmd);
 661
 662	if (cmd->aborted) {
 663		/* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 664		 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 665		 * already kick start the free.
 666		 */
 667		pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 668			"transport_state %x, t_state %x, se_cmd_flags %x\n",
 669			cmd, kref_read(&cmd->se_cmd.cmd_kref),
 670			cmd->se_cmd.transport_state,
 671			cmd->se_cmd.t_state,
 672			cmd->se_cmd.se_cmd_flags);
 673		return 0;
 674	}
 675
 676	cmd->trc_flags |= TRC_XMIT_DATA;
 677	cmd->bufflen = se_cmd->data_length;
 678	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 679
 680	cmd->sg_cnt = se_cmd->t_data_nents;
 681	cmd->sg = se_cmd->t_data_sg;
 682	cmd->offset = 0;
 683
 684	cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 685	cmd->prot_sg = se_cmd->t_prot_sg;
 686	cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 687	se_cmd->pi_err = 0;
 688
 689	/*
 690	 * Now queue completed DATA_IN the qla2xxx LLD and response ring
 691	 */
 692	return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 693				se_cmd->scsi_status);
 694}
 695
 696static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 697{
 698	struct qla_tgt_cmd *cmd = container_of(se_cmd,
 699				struct qla_tgt_cmd, se_cmd);
 700	int xmit_type = QLA_TGT_XMIT_STATUS;
 701
 702	if (cmd->aborted) {
 703		/*
 704		 * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 705		 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 706		 * already kick start the free.
 707		 */
 708		pr_debug(
 709		    "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 710		    cmd, kref_read(&cmd->se_cmd.cmd_kref),
 711		    cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 712		    cmd->se_cmd.se_cmd_flags);
 713		return 0;
 714	}
 715	cmd->bufflen = se_cmd->data_length;
 716	cmd->sg = NULL;
 717	cmd->sg_cnt = 0;
 718	cmd->offset = 0;
 719	cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 720	cmd->trc_flags |= TRC_XMIT_STATUS;
 721
 722	if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 723		/*
 724		 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 725		 * for qla_tgt_xmit_response LLD code
 726		 */
 727		if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 728			se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 729			se_cmd->residual_count = 0;
 730		}
 731		se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 732		se_cmd->residual_count += se_cmd->data_length;
 733
 734		cmd->bufflen = 0;
 735	}
 736	/*
 737	 * Now queue status response to qla2xxx LLD code and response ring
 738	 */
 739	return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 740}
 741
 742static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 743{
 744	struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 745	struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 746				struct qla_tgt_mgmt_cmd, se_cmd);
 747
 748	pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 749			mcmd, se_tmr->function, se_tmr->response);
 750	/*
 751	 * Do translation between TCM TM response codes and
 752	 * QLA2xxx FC TM response codes.
 753	 */
 754	switch (se_tmr->response) {
 755	case TMR_FUNCTION_COMPLETE:
 756		mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 757		break;
 758	case TMR_TASK_DOES_NOT_EXIST:
 759		mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 760		break;
 761	case TMR_FUNCTION_REJECTED:
 762		mcmd->fc_tm_rsp = FC_TM_REJECT;
 763		break;
 764	case TMR_LUN_DOES_NOT_EXIST:
 765	default:
 766		mcmd->fc_tm_rsp = FC_TM_FAILED;
 767		break;
 768	}
 769	/*
 770	 * Queue the TM response to QLA2xxx LLD to build a
 771	 * CTIO response packet.
 772	 */
 773	qlt_xmit_tm_rsp(mcmd);
 774}
 775
 776static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 777{
 778	struct qla_tgt_cmd *cmd;
 779	unsigned long flags;
 780
 781	if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 782		return;
 783
 784	cmd  = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 785
 786	spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
 787	list_del_init(&cmd->sess_cmd_list);
 788	spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
 789
 790	qlt_abort_cmd(cmd);
 791}
 792
 793static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 794			struct tcm_qla2xxx_nacl *, struct fc_port *);
 795/*
 796 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 797 */
 798static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 799{
 800	struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 801	struct se_portal_group *se_tpg = se_nacl->se_tpg;
 802	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 803	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 804				struct tcm_qla2xxx_lport, lport_wwn);
 805	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 806				struct tcm_qla2xxx_nacl, se_node_acl);
 807	void *node;
 808
 809	pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 810
 811	node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 812	if (WARN_ON(node && (node != se_nacl))) {
 813		/*
 814		 * The nacl no longer matches what we think it should be.
 815		 * Most likely a new dynamic acl has been added while
 816		 * someone dropped the hardware lock.  It clearly is a
 817		 * bug elsewhere, but this bit can't make things worse.
 818		 */
 819		btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 820			       node, GFP_ATOMIC);
 821	}
 822
 823	pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 824	    se_nacl, nacl->nport_wwnn, nacl->nport_id);
 825	/*
 826	 * Now clear the se_nacl and session pointers from our HW lport lookup
 827	 * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 828	 *
 829	 * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 830	 * target_wait_for_sess_cmds() before the session waits for outstanding
 831	 * I/O to complete, to avoid a race between session shutdown execution
 832	 * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 833	 */
 834	tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 835}
 836
 837static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 838{
 839	target_stop_session(sess->se_sess);
 840}
 841
 842static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 843		const char *name)
 844{
 845	struct tcm_qla2xxx_nacl *nacl =
 846		container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 847	u64 wwnn;
 848
 849	if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 850		return -EINVAL;
 851
 852	nacl->nport_wwnn = wwnn;
 853	tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 854
 855	return 0;
 856}
 857
 858/* Start items for tcm_qla2xxx_tpg_attrib_cit */
 859
 860#define DEF_QLA_TPG_ATTRIB(name)					\
 861									\
 862static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(			\
 863		struct config_item *item, char *page)			\
 864{									\
 865	struct se_portal_group *se_tpg = attrib_to_tpg(item);		\
 866	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,		\
 867			struct tcm_qla2xxx_tpg, se_tpg);		\
 868									\
 869	return sprintf(page, "%d\n", tpg->tpg_attrib.name);	\
 870}									\
 871									\
 872static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(			\
 873		struct config_item *item, const char *page, size_t count) \
 874{									\
 875	struct se_portal_group *se_tpg = attrib_to_tpg(item);		\
 876	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,		\
 877			struct tcm_qla2xxx_tpg, se_tpg);		\
 878	struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;		\
 879	unsigned long val;						\
 880	int ret;							\
 881									\
 882	ret = kstrtoul(page, 0, &val);					\
 883	if (ret < 0) {							\
 884		pr_err("kstrtoul() failed with"				\
 885				" ret: %d\n", ret);			\
 886		return -EINVAL;						\
 887	}								\
 888									\
 889	if ((val != 0) && (val != 1)) {					\
 890		pr_err("Illegal boolean value %lu\n", val);		\
 891		return -EINVAL;						\
 892	}								\
 893									\
 894	a->name = val;							\
 895									\
 896	return count;							\
 897}									\
 898CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 899
 900DEF_QLA_TPG_ATTRIB(generate_node_acls);
 901DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 902DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 903DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 904DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 905#ifdef CONFIG_TCM_QLA2XXX_DEBUG
 906DEF_QLA_TPG_ATTRIB(jam_host);
 907#endif
 908
 909static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 910	&tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 911	&tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 912	&tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 913	&tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 914	&tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 915#ifdef CONFIG_TCM_QLA2XXX_DEBUG
 916	&tcm_qla2xxx_tpg_attrib_attr_jam_host,
 917#endif
 918	NULL,
 919};
 920
 921/* End items for tcm_qla2xxx_tpg_attrib_cit */
 922
 923static int tcm_qla2xxx_enable_tpg(struct se_portal_group *se_tpg,
 924				  bool enable)
 925{
 926	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 927	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 928			struct tcm_qla2xxx_lport, lport_wwn);
 929	struct scsi_qla_host *vha = lport->qla_vha;
 930	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 931			struct tcm_qla2xxx_tpg, se_tpg);
 932
 933	if (enable) {
 934		if (atomic_read(&tpg->lport_tpg_enabled))
 935			return -EEXIST;
 936
 937		atomic_set(&tpg->lport_tpg_enabled, 1);
 938		qlt_enable_vha(vha);
 939	} else {
 940		if (!atomic_read(&tpg->lport_tpg_enabled))
 941			return 0;
 942
 943		atomic_set(&tpg->lport_tpg_enabled, 0);
 944		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 945		qlt_stop_phase2(vha->vha_tgt.qla_tgt);
 946	}
 947
 948	return 0;
 949}
 950
 951static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 952		char *page)
 953{
 954	return target_show_dynamic_sessions(to_tpg(item), page);
 955}
 956
 957static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 958		const char *page, size_t count)
 959{
 960	struct se_portal_group *se_tpg = to_tpg(item);
 961	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 962				struct tcm_qla2xxx_tpg, se_tpg);
 963	unsigned long val;
 964	int ret = kstrtoul(page, 0, &val);
 965
 966	if (ret) {
 967		pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 968		return ret;
 969	}
 970	if (val != 0 && val != 1 && val != 3) {
 971		pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 972		return -EINVAL;
 973	}
 974	tpg->tpg_attrib.fabric_prot_type = val;
 975
 976	return count;
 977}
 978
 979static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 980		char *page)
 981{
 982	struct se_portal_group *se_tpg = to_tpg(item);
 983	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 984				struct tcm_qla2xxx_tpg, se_tpg);
 985
 986	return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
 987}
 988
 989CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
 990CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
 991
 992static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 993	&tcm_qla2xxx_tpg_attr_dynamic_sessions,
 994	&tcm_qla2xxx_tpg_attr_fabric_prot_type,
 995	NULL,
 996};
 997
 998static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
 999						    const char *name)
1000{
1001	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1002			struct tcm_qla2xxx_lport, lport_wwn);
1003	struct tcm_qla2xxx_tpg *tpg;
1004	unsigned long tpgt;
1005	int ret;
1006
1007	if (strstr(name, "tpgt_") != name)
1008		return ERR_PTR(-EINVAL);
1009	if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1010		return ERR_PTR(-EINVAL);
1011
1012	if ((tpgt != 1)) {
1013		pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1014		return ERR_PTR(-ENOSYS);
1015	}
1016
1017	tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1018	if (!tpg) {
1019		pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1020		return ERR_PTR(-ENOMEM);
1021	}
1022	tpg->lport = lport;
1023	tpg->lport_tpgt = tpgt;
1024	/*
1025	 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1026	 * NodeACLs
1027	 */
1028	tpg->tpg_attrib.generate_node_acls = 1;
1029	tpg->tpg_attrib.demo_mode_write_protect = 1;
1030	tpg->tpg_attrib.cache_dynamic_acls = 1;
1031	tpg->tpg_attrib.demo_mode_login_only = 1;
1032	tpg->tpg_attrib.jam_host = 0;
1033
1034	ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1035	if (ret < 0) {
1036		kfree(tpg);
1037		return NULL;
1038	}
1039
1040	lport->tpg_1 = tpg;
1041
1042	return &tpg->se_tpg;
1043}
1044
1045static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1046{
1047	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1048			struct tcm_qla2xxx_tpg, se_tpg);
1049	struct tcm_qla2xxx_lport *lport = tpg->lport;
1050	struct scsi_qla_host *vha = lport->qla_vha;
1051	/*
1052	 * Call into qla2x_target.c LLD logic to shutdown the active
1053	 * FC Nexuses and disable target mode operation for this qla_hw_data
1054	 */
1055	if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1056		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1057
1058	core_tpg_deregister(se_tpg);
1059	/*
1060	 * Clear local TPG=1 pointer for non NPIV mode.
1061	 */
1062	lport->tpg_1 = NULL;
1063	kfree(tpg);
1064}
1065
1066static int tcm_qla2xxx_npiv_enable_tpg(struct se_portal_group *se_tpg,
1067				    bool enable)
1068{
1069	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1070	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1071			struct tcm_qla2xxx_lport, lport_wwn);
1072	struct scsi_qla_host *vha = lport->qla_vha;
1073	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1074			struct tcm_qla2xxx_tpg, se_tpg);
1075
1076	if (enable) {
1077		if (atomic_read(&tpg->lport_tpg_enabled))
1078			return -EEXIST;
1079
1080		atomic_set(&tpg->lport_tpg_enabled, 1);
1081		qlt_enable_vha(vha);
1082	} else {
1083		if (!atomic_read(&tpg->lport_tpg_enabled))
1084			return 0;
1085
1086		atomic_set(&tpg->lport_tpg_enabled, 0);
1087		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1088		qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1089	}
1090
1091	return 0;
1092}
1093
1094static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1095							 const char *name)
1096{
1097	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1098			struct tcm_qla2xxx_lport, lport_wwn);
1099	struct tcm_qla2xxx_tpg *tpg;
1100	unsigned long tpgt;
1101	int ret;
1102
1103	if (strstr(name, "tpgt_") != name)
1104		return ERR_PTR(-EINVAL);
1105	if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1106		return ERR_PTR(-EINVAL);
1107
1108	tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1109	if (!tpg) {
1110		pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1111		return ERR_PTR(-ENOMEM);
1112	}
1113	tpg->lport = lport;
1114	tpg->lport_tpgt = tpgt;
1115
1116	/*
1117	 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1118	 * NodeACLs
1119	 */
1120	tpg->tpg_attrib.generate_node_acls = 1;
1121	tpg->tpg_attrib.demo_mode_write_protect = 1;
1122	tpg->tpg_attrib.cache_dynamic_acls = 1;
1123	tpg->tpg_attrib.demo_mode_login_only = 1;
1124
1125	ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1126	if (ret < 0) {
1127		kfree(tpg);
1128		return NULL;
1129	}
1130	lport->tpg_1 = tpg;
1131	return &tpg->se_tpg;
1132}
1133
1134/*
1135 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1136 */
1137static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
1138						     const be_id_t s_id)
1139{
1140	struct tcm_qla2xxx_lport *lport;
1141	struct se_node_acl *se_nacl;
1142	struct tcm_qla2xxx_nacl *nacl;
1143	u32 key;
1144
1145	lport = vha->vha_tgt.target_lport_ptr;
1146	if (!lport) {
1147		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1148		dump_stack();
1149		return NULL;
1150	}
1151
1152	key = sid_to_key(s_id);
1153	pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1154
1155	se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1156	if (!se_nacl) {
1157		pr_debug("Unable to locate s_id: 0x%06x\n", key);
1158		return NULL;
1159	}
1160	pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1161	    se_nacl, se_nacl->initiatorname);
1162
1163	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1164	if (!nacl->fc_port) {
1165		pr_err("Unable to locate struct fc_port\n");
1166		return NULL;
1167	}
1168
1169	return nacl->fc_port;
1170}
1171
1172/*
1173 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1174 */
1175static void tcm_qla2xxx_set_sess_by_s_id(
1176	struct tcm_qla2xxx_lport *lport,
1177	struct se_node_acl *new_se_nacl,
1178	struct tcm_qla2xxx_nacl *nacl,
1179	struct se_session *se_sess,
1180	struct fc_port *fc_port,
1181	be_id_t s_id)
1182{
1183	u32 key;
1184	void *slot;
1185	int rc;
1186
1187	key = sid_to_key(s_id);
1188	pr_debug("set_sess_by_s_id: %06x\n", key);
1189
1190	slot = btree_lookup32(&lport->lport_fcport_map, key);
1191	if (!slot) {
1192		if (new_se_nacl) {
1193			pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1194			nacl->nport_id = key;
1195			rc = btree_insert32(&lport->lport_fcport_map, key,
1196					new_se_nacl, GFP_ATOMIC);
1197			if (rc)
1198				printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1199				    (int)key);
1200		} else {
1201			pr_debug("Wiping nonexisting fc_port entry\n");
1202		}
1203
1204		fc_port->se_sess = se_sess;
1205		nacl->fc_port = fc_port;
1206		return;
1207	}
1208
1209	if (nacl->fc_port) {
1210		if (new_se_nacl == NULL) {
1211			pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1212			btree_remove32(&lport->lport_fcport_map, key);
1213			nacl->fc_port = NULL;
1214			return;
1215		}
1216		pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1217		btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1218		fc_port->se_sess = se_sess;
1219		nacl->fc_port = fc_port;
1220		return;
1221	}
1222
1223	if (new_se_nacl == NULL) {
1224		pr_debug("Clearing existing fc_port entry\n");
1225		btree_remove32(&lport->lport_fcport_map, key);
1226		return;
1227	}
1228
1229	pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1230	btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1231	fc_port->se_sess = se_sess;
1232	nacl->fc_port = fc_port;
1233
1234	pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1235	    nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1236}
1237
1238/*
1239 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1240 */
1241static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1242	scsi_qla_host_t *vha,
1243	const uint16_t loop_id)
1244{
1245	struct tcm_qla2xxx_lport *lport;
1246	struct se_node_acl *se_nacl;
1247	struct tcm_qla2xxx_nacl *nacl;
1248	struct tcm_qla2xxx_fc_loopid *fc_loopid;
1249
1250	lport = vha->vha_tgt.target_lport_ptr;
1251	if (!lport) {
1252		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1253		dump_stack();
1254		return NULL;
1255	}
1256
1257	pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1258
1259	fc_loopid = lport->lport_loopid_map + loop_id;
1260	se_nacl = fc_loopid->se_nacl;
1261	if (!se_nacl) {
1262		pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1263		    loop_id);
1264		return NULL;
1265	}
1266
1267	nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1268
1269	if (!nacl->fc_port) {
1270		pr_err("Unable to locate struct fc_port\n");
1271		return NULL;
1272	}
1273
1274	return nacl->fc_port;
1275}
1276
1277/*
1278 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1279 */
1280static void tcm_qla2xxx_set_sess_by_loop_id(
1281	struct tcm_qla2xxx_lport *lport,
1282	struct se_node_acl *new_se_nacl,
1283	struct tcm_qla2xxx_nacl *nacl,
1284	struct se_session *se_sess,
1285	struct fc_port *fc_port,
1286	uint16_t loop_id)
1287{
1288	struct se_node_acl *saved_nacl;
1289	struct tcm_qla2xxx_fc_loopid *fc_loopid;
1290
1291	pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1292
1293	fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1294			lport->lport_loopid_map)[loop_id];
1295
1296	saved_nacl = fc_loopid->se_nacl;
1297	if (!saved_nacl) {
1298		pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1299		fc_loopid->se_nacl = new_se_nacl;
1300		if (fc_port->se_sess != se_sess)
1301			fc_port->se_sess = se_sess;
1302		if (nacl->fc_port != fc_port)
1303			nacl->fc_port = fc_port;
1304		return;
1305	}
1306
1307	if (nacl->fc_port) {
1308		if (new_se_nacl == NULL) {
1309			pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1310			fc_loopid->se_nacl = NULL;
1311			nacl->fc_port = NULL;
1312			return;
1313		}
1314
1315		pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1316		fc_loopid->se_nacl = new_se_nacl;
1317		if (fc_port->se_sess != se_sess)
1318			fc_port->se_sess = se_sess;
1319		if (nacl->fc_port != fc_port)
1320			nacl->fc_port = fc_port;
1321		return;
1322	}
1323
1324	if (new_se_nacl == NULL) {
1325		pr_debug("Clearing fc_loopid->se_nacl\n");
1326		fc_loopid->se_nacl = NULL;
1327		return;
1328	}
1329
1330	pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1331	fc_loopid->se_nacl = new_se_nacl;
1332	if (fc_port->se_sess != se_sess)
1333		fc_port->se_sess = se_sess;
1334	if (nacl->fc_port != fc_port)
1335		nacl->fc_port = fc_port;
1336
1337	pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1338	    nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1339}
1340
1341/*
1342 * Should always be called with qla_hw_data->tgt.sess_lock held.
1343 */
1344static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1345		struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1346{
1347	struct se_session *se_sess = sess->se_sess;
1348
1349	tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1350				     sess, port_id_to_be_id(sess->d_id));
1351	tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1352				sess, sess->loop_id);
1353}
1354
1355static void tcm_qla2xxx_free_session(struct fc_port *sess)
1356{
1357	struct qla_tgt *tgt = sess->tgt;
1358	struct qla_hw_data *ha = tgt->ha;
1359	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1360	struct se_session *se_sess;
1361	struct tcm_qla2xxx_lport *lport;
1362
1363	se_sess = sess->se_sess;
1364	if (!se_sess) {
1365		pr_err("struct fc_port->se_sess is NULL\n");
1366		dump_stack();
1367		return;
1368	}
1369
1370	lport = vha->vha_tgt.target_lport_ptr;
1371	if (!lport) {
1372		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1373		dump_stack();
1374		return;
1375	}
1376	target_wait_for_sess_cmds(se_sess);
1377
1378	target_remove_session(se_sess);
1379}
1380
1381static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1382				  struct se_session *se_sess, void *p)
1383{
1384	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1385				struct tcm_qla2xxx_tpg, se_tpg);
1386	struct tcm_qla2xxx_lport *lport = tpg->lport;
1387	struct qla_hw_data *ha = lport->qla_vha->hw;
1388	struct se_node_acl *se_nacl = se_sess->se_node_acl;
1389	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1390				struct tcm_qla2xxx_nacl, se_node_acl);
1391	struct fc_port *qlat_sess = p;
1392	uint16_t loop_id = qlat_sess->loop_id;
1393	unsigned long flags;
1394
1395	/*
1396	 * And now setup se_nacl and session pointers into HW lport internal
1397	 * mappings for fabric S_ID and LOOP_ID.
1398	 */
1399	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1400	tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
1401				     port_id_to_be_id(qlat_sess->d_id));
1402	tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1403					se_sess, qlat_sess, loop_id);
1404	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1405
1406	return 0;
1407}
1408
1409/*
1410 * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1411 * to locate struct se_node_acl
1412 */
1413static int tcm_qla2xxx_check_initiator_node_acl(
1414	scsi_qla_host_t *vha,
1415	unsigned char *fc_wwpn,
1416	struct fc_port *qlat_sess)
1417{
1418	struct qla_hw_data *ha = vha->hw;
1419	struct tcm_qla2xxx_lport *lport;
1420	struct tcm_qla2xxx_tpg *tpg;
1421	struct se_session *se_sess;
1422	unsigned char port_name[36];
1423	int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1424		       TCM_QLA2XXX_DEFAULT_TAGS;
1425
1426	lport = vha->vha_tgt.target_lport_ptr;
1427	if (!lport) {
1428		pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1429		dump_stack();
1430		return -EINVAL;
1431	}
1432	/*
1433	 * Locate the TPG=1 reference..
1434	 */
1435	tpg = lport->tpg_1;
1436	if (!tpg) {
1437		pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
1438		return -EINVAL;
1439	}
1440	/*
1441	 * Format the FCP Initiator port_name into colon seperated values to
1442	 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1443	 */
1444	memset(&port_name, 0, 36);
1445	snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1446	/*
1447	 * Locate our struct se_node_acl either from an explict NodeACL created
1448	 * via ConfigFS, or via running in TPG demo mode.
1449	 */
1450	se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1451				       sizeof(struct qla_tgt_cmd),
1452				       TARGET_PROT_ALL, port_name,
1453				       qlat_sess, tcm_qla2xxx_session_cb);
1454	if (IS_ERR(se_sess))
1455		return PTR_ERR(se_sess);
1456
1457	return 0;
1458}
1459
1460static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1461				    uint16_t loop_id, bool conf_compl_supported)
1462{
1463	struct qla_tgt *tgt = sess->tgt;
1464	struct qla_hw_data *ha = tgt->ha;
1465	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1466	struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1467	struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1468	struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1469			struct tcm_qla2xxx_nacl, se_node_acl);
1470	u32 key;
1471
1472
1473	if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1474		pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1475		    sess, sess->port_name,
1476		    sess->loop_id, loop_id, sess->d_id.b.domain,
1477		    sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1478		    s_id.b.area, s_id.b.al_pa);
1479
1480	if (sess->loop_id != loop_id) {
1481		/*
1482		 * Because we can shuffle loop IDs around and we
1483		 * update different sessions non-atomically, we might
1484		 * have overwritten this session's old loop ID
1485		 * already, and we might end up overwriting some other
1486		 * session that will be updated later.  So we have to
1487		 * be extra careful and we can't warn about those things...
1488		 */
1489		if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1490			lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1491
1492		lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1493
1494		sess->loop_id = loop_id;
1495	}
1496
1497	if (sess->d_id.b24 != s_id.b24) {
1498		key = (((u32) sess->d_id.b.domain << 16) |
1499		       ((u32) sess->d_id.b.area   <<  8) |
1500		       ((u32) sess->d_id.b.al_pa));
1501
1502		if (btree_lookup32(&lport->lport_fcport_map, key))
1503			WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1504			    se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1505			    sess->d_id.b.domain, sess->d_id.b.area,
1506			    sess->d_id.b.al_pa);
1507		else
1508			WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1509			     sess->d_id.b.domain, sess->d_id.b.area,
1510			     sess->d_id.b.al_pa);
1511
1512		key = (((u32) s_id.b.domain << 16) |
1513		       ((u32) s_id.b.area   <<  8) |
1514		       ((u32) s_id.b.al_pa));
1515
1516		if (btree_lookup32(&lport->lport_fcport_map, key)) {
1517			WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1518			     s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1519			btree_update32(&lport->lport_fcport_map, key, se_nacl);
1520		} else {
1521			btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1522			    GFP_ATOMIC);
1523		}
1524
1525		sess->d_id = s_id;
1526		nacl->nport_id = key;
1527	}
1528
1529	sess->conf_compl_supported = conf_compl_supported;
1530
1531}
1532
1533/*
1534 * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1535 */
1536static const struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1537	.find_cmd_by_tag	= tcm_qla2xxx_find_cmd_by_tag,
1538	.handle_cmd		= tcm_qla2xxx_handle_cmd,
1539	.handle_data		= tcm_qla2xxx_handle_data,
1540	.handle_tmr		= tcm_qla2xxx_handle_tmr,
1541	.get_cmd		= tcm_qla2xxx_get_cmd,
1542	.get_cmd_ref		= tcm_qla2xxx_get_cmd_ref,
1543	.put_cmd_ref		= tcm_qla2xxx_put_cmd_ref,
1544	.rel_cmd		= tcm_qla2xxx_rel_cmd,
1545	.free_cmd		= tcm_qla2xxx_free_cmd,
1546	.free_mcmd		= tcm_qla2xxx_free_mcmd,
1547	.free_session		= tcm_qla2xxx_free_session,
1548	.update_sess		= tcm_qla2xxx_update_sess,
1549	.check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1550	.find_sess_by_s_id	= tcm_qla2xxx_find_sess_by_s_id,
1551	.find_sess_by_loop_id	= tcm_qla2xxx_find_sess_by_loop_id,
1552	.clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1553	.put_sess		= tcm_qla2xxx_put_sess,
1554	.shutdown_sess		= tcm_qla2xxx_shutdown_sess,
1555	.get_dif_tags		= tcm_qla2xxx_dif_tags,
1556	.chk_dif_tags		= tcm_qla2xxx_chk_dif_tags,
1557};
1558
1559static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1560{
1561	int rc;
1562	size_t map_sz;
1563
1564	rc = btree_init32(&lport->lport_fcport_map);
1565	if (rc) {
1566		pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1567		return rc;
1568	}
1569
1570	map_sz = array_size(65536, sizeof(struct tcm_qla2xxx_fc_loopid));
1571
1572	lport->lport_loopid_map = vzalloc(map_sz);
1573	if (!lport->lport_loopid_map) {
1574		pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n", map_sz);
1575		btree_destroy32(&lport->lport_fcport_map);
1576		return -ENOMEM;
1577	}
1578	pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n", map_sz);
1579	return 0;
1580}
1581
1582static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1583					 void *target_lport_ptr,
1584					 u64 npiv_wwpn, u64 npiv_wwnn)
1585{
1586	struct qla_hw_data *ha = vha->hw;
1587	struct tcm_qla2xxx_lport *lport =
1588			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1589	/*
1590	 * Setup tgt_ops, local pointer to vha and target_lport_ptr
1591	 */
1592	ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1593	vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1594	lport->qla_vha = vha;
1595
1596	return 0;
1597}
1598
1599static struct se_wwn *tcm_qla2xxx_make_lport(
1600	struct target_fabric_configfs *tf,
1601	struct config_group *group,
1602	const char *name)
1603{
1604	struct tcm_qla2xxx_lport *lport;
1605	u64 wwpn;
1606	int ret = -ENODEV;
1607
1608	if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1609		return ERR_PTR(-EINVAL);
1610
1611	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1612	if (!lport) {
1613		pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1614		return ERR_PTR(-ENOMEM);
1615	}
1616	lport->lport_wwpn = wwpn;
1617	tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1618				wwpn);
1619	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1620
1621	ret = tcm_qla2xxx_init_lport(lport);
1622	if (ret != 0)
1623		goto out;
1624
1625	ret = qlt_lport_register(lport, wwpn, 0, 0,
1626				 tcm_qla2xxx_lport_register_cb);
1627	if (ret != 0)
1628		goto out_lport;
1629
1630	return &lport->lport_wwn;
1631out_lport:
1632	vfree(lport->lport_loopid_map);
1633	btree_destroy32(&lport->lport_fcport_map);
1634out:
1635	kfree(lport);
1636	return ERR_PTR(ret);
1637}
1638
1639static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1640{
1641	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1642			struct tcm_qla2xxx_lport, lport_wwn);
1643	struct scsi_qla_host *vha = lport->qla_vha;
1644	struct se_node_acl *node;
1645	u32 key = 0;
1646
1647	/*
1648	 * Call into qla2x_target.c LLD logic to complete the
1649	 * shutdown of struct qla_tgt after the call to
1650	 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1651	 */
1652	if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1653		qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1654
1655	qlt_lport_deregister(vha);
1656
1657	vfree(lport->lport_loopid_map);
1658	btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1659		btree_remove32(&lport->lport_fcport_map, key);
1660	btree_destroy32(&lport->lport_fcport_map);
1661	kfree(lport);
1662}
1663
1664static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1665					      void *target_lport_ptr,
1666					      u64 npiv_wwpn, u64 npiv_wwnn)
1667{
1668	struct fc_vport *vport;
1669	struct Scsi_Host *sh = base_vha->host;
1670	struct scsi_qla_host *npiv_vha;
1671	struct tcm_qla2xxx_lport *lport =
1672			(struct tcm_qla2xxx_lport *)target_lport_ptr;
1673	struct tcm_qla2xxx_lport *base_lport =
1674			(struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1675	struct fc_vport_identifiers vport_id;
1676
1677	if (qla_ini_mode_enabled(base_vha)) {
1678		pr_err("qla2xxx base_vha not enabled for target mode\n");
1679		return -EPERM;
1680	}
1681
1682	if (!base_lport || !base_lport->tpg_1 ||
1683	    !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1684		pr_err("qla2xxx base_lport or tpg_1 not available\n");
1685		return -EPERM;
1686	}
1687
1688	memset(&vport_id, 0, sizeof(vport_id));
1689	vport_id.port_name = npiv_wwpn;
1690	vport_id.node_name = npiv_wwnn;
1691	vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1692	vport_id.vport_type = FC_PORTTYPE_NPIV;
1693	vport_id.disable = false;
1694
1695	vport = fc_vport_create(sh, 0, &vport_id);
1696	if (!vport) {
1697		pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1698		return -ENODEV;
1699	}
1700	/*
1701	 * Setup local pointer to NPIV vhba + target_lport_ptr
1702	 */
1703	npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1704	npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1705	lport->qla_vha = npiv_vha;
1706	scsi_host_get(npiv_vha->host);
1707	return 0;
1708}
1709
1710
1711static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1712	struct target_fabric_configfs *tf,
1713	struct config_group *group,
1714	const char *name)
1715{
1716	struct tcm_qla2xxx_lport *lport;
1717	u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1718	char *p, tmp[128];
1719	int ret;
1720
1721	snprintf(tmp, 128, "%s", name);
1722
1723	p = strchr(tmp, '@');
1724	if (!p) {
1725		pr_err("Unable to locate NPIV '@' separator\n");
1726		return ERR_PTR(-EINVAL);
1727	}
1728	*p++ = '\0';
1729
1730	if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1731		return ERR_PTR(-EINVAL);
1732
1733	if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1734				       &npiv_wwpn, &npiv_wwnn) < 0)
1735		return ERR_PTR(-EINVAL);
1736
1737	lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1738	if (!lport) {
1739		pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1740		return ERR_PTR(-ENOMEM);
1741	}
1742	lport->lport_npiv_wwpn = npiv_wwpn;
1743	lport->lport_npiv_wwnn = npiv_wwnn;
1744	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1745
1746	ret = tcm_qla2xxx_init_lport(lport);
1747	if (ret != 0)
1748		goto out;
1749
1750	ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1751				 tcm_qla2xxx_lport_register_npiv_cb);
1752	if (ret != 0)
1753		goto out_lport;
1754
1755	return &lport->lport_wwn;
1756out_lport:
1757	vfree(lport->lport_loopid_map);
1758	btree_destroy32(&lport->lport_fcport_map);
1759out:
1760	kfree(lport);
1761	return ERR_PTR(ret);
1762}
1763
1764static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1765{
1766	struct tcm_qla2xxx_lport *lport = container_of(wwn,
1767			struct tcm_qla2xxx_lport, lport_wwn);
1768	struct scsi_qla_host *npiv_vha = lport->qla_vha;
1769	struct qla_hw_data *ha = npiv_vha->hw;
1770	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1771
1772	scsi_host_put(npiv_vha->host);
1773	/*
1774	 * Notify libfc that we want to release the vha->fc_vport
1775	 */
1776	fc_vport_terminate(npiv_vha->fc_vport);
1777	scsi_host_put(base_vha->host);
1778	kfree(lport);
1779}
1780
1781
1782static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1783		char *page)
1784{
1785	return sprintf(page,
1786	    "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1787	    QLA2XXX_VERSION, utsname()->sysname,
1788	    utsname()->machine, utsname()->release);
1789}
1790
1791CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1792
1793static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1794	&tcm_qla2xxx_wwn_attr_version,
1795	NULL,
1796};
1797
1798static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1799	.module				= THIS_MODULE,
1800	.fabric_name			= "qla2xxx",
1801	.node_acl_size			= sizeof(struct tcm_qla2xxx_nacl),
1802	/*
1803	 * XXX: Limit assumes single page per scatter-gather-list entry.
1804	 * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1805	 */
1806	.max_data_sg_nents		= 1200,
1807	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
1808	.tpg_get_tag			= tcm_qla2xxx_get_tag,
1809	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
1810	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
1811	.tpg_check_demo_mode_write_protect =
1812					tcm_qla2xxx_check_demo_write_protect,
1813	.tpg_check_prod_mode_write_protect =
1814					tcm_qla2xxx_check_prod_write_protect,
1815	.tpg_check_prot_fabric_only	= tcm_qla2xxx_check_prot_fabric_only,
1816	.tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1817	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
1818	.check_stop_free		= tcm_qla2xxx_check_stop_free,
1819	.release_cmd			= tcm_qla2xxx_release_cmd,
1820	.close_session			= tcm_qla2xxx_close_session,
1821	.sess_get_initiator_sid		= NULL,
1822	.write_pending			= tcm_qla2xxx_write_pending,
1823	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
1824	.queue_data_in			= tcm_qla2xxx_queue_data_in,
1825	.queue_status			= tcm_qla2xxx_queue_status,
1826	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
1827	.aborted_task			= tcm_qla2xxx_aborted_task,
1828	/*
1829	 * Setup function pointers for generic logic in
1830	 * target_core_fabric_configfs.c
1831	 */
1832	.fabric_make_wwn		= tcm_qla2xxx_make_lport,
1833	.fabric_drop_wwn		= tcm_qla2xxx_drop_lport,
1834	.fabric_make_tpg		= tcm_qla2xxx_make_tpg,
1835	.fabric_enable_tpg		= tcm_qla2xxx_enable_tpg,
1836	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
1837	.fabric_init_nodeacl		= tcm_qla2xxx_init_nodeacl,
1838
1839	.tfc_wwn_attrs			= tcm_qla2xxx_wwn_attrs,
1840	.tfc_tpg_base_attrs		= tcm_qla2xxx_tpg_attrs,
1841	.tfc_tpg_attrib_attrs		= tcm_qla2xxx_tpg_attrib_attrs,
1842
1843	.default_submit_type		= TARGET_DIRECT_SUBMIT,
1844	.direct_submit_supp		= 1,
1845};
1846
1847static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1848	.module				= THIS_MODULE,
1849	.fabric_name			= "qla2xxx_npiv",
1850	.node_acl_size			= sizeof(struct tcm_qla2xxx_nacl),
1851	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
1852	.tpg_get_tag			= tcm_qla2xxx_get_tag,
1853	.tpg_check_demo_mode		= tcm_qla2xxx_check_demo_mode,
1854	.tpg_check_demo_mode_cache	= tcm_qla2xxx_check_demo_mode_cache,
1855	.tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1856	.tpg_check_prod_mode_write_protect =
1857	    tcm_qla2xxx_check_prod_write_protect,
1858	.tpg_check_demo_mode_login_only	= tcm_qla2xxx_check_demo_mode_login_only,
1859	.tpg_get_inst_index		= tcm_qla2xxx_tpg_get_inst_index,
1860	.check_stop_free                = tcm_qla2xxx_check_stop_free,
1861	.release_cmd			= tcm_qla2xxx_release_cmd,
1862	.close_session			= tcm_qla2xxx_close_session,
1863	.sess_get_initiator_sid		= NULL,
1864	.write_pending			= tcm_qla2xxx_write_pending,
1865	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
1866	.queue_data_in			= tcm_qla2xxx_queue_data_in,
1867	.queue_status			= tcm_qla2xxx_queue_status,
1868	.queue_tm_rsp			= tcm_qla2xxx_queue_tm_rsp,
1869	.aborted_task			= tcm_qla2xxx_aborted_task,
1870	/*
1871	 * Setup function pointers for generic logic in
1872	 * target_core_fabric_configfs.c
1873	 */
1874	.fabric_make_wwn		= tcm_qla2xxx_npiv_make_lport,
1875	.fabric_drop_wwn		= tcm_qla2xxx_npiv_drop_lport,
1876	.fabric_make_tpg		= tcm_qla2xxx_npiv_make_tpg,
1877	.fabric_enable_tpg		= tcm_qla2xxx_npiv_enable_tpg,
1878	.fabric_drop_tpg		= tcm_qla2xxx_drop_tpg,
1879	.fabric_init_nodeacl		= tcm_qla2xxx_init_nodeacl,
1880
1881	.tfc_wwn_attrs			= tcm_qla2xxx_wwn_attrs,
1882
1883	.default_submit_type		= TARGET_DIRECT_SUBMIT,
1884	.direct_submit_supp		= 1,
1885};
1886
1887static int tcm_qla2xxx_register_configfs(void)
1888{
1889	int ret;
1890
1891	pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1892	    QLA2XXX_VERSION, utsname()->sysname,
1893	    utsname()->machine, utsname()->release);
1894
1895	ret = target_register_template(&tcm_qla2xxx_ops);
1896	if (ret)
1897		return ret;
1898
1899	ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1900	if (ret)
1901		goto out_fabric;
1902
1903	tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1904						WQ_MEM_RECLAIM, 0);
1905	if (!tcm_qla2xxx_free_wq) {
1906		ret = -ENOMEM;
1907		goto out_fabric_npiv;
1908	}
1909
1910	return 0;
1911
1912out_fabric_npiv:
1913	target_unregister_template(&tcm_qla2xxx_npiv_ops);
1914out_fabric:
1915	target_unregister_template(&tcm_qla2xxx_ops);
1916	return ret;
1917}
1918
1919static void tcm_qla2xxx_deregister_configfs(void)
1920{
1921	destroy_workqueue(tcm_qla2xxx_free_wq);
1922
1923	target_unregister_template(&tcm_qla2xxx_ops);
1924	target_unregister_template(&tcm_qla2xxx_npiv_ops);
1925}
1926
1927static int __init tcm_qla2xxx_init(void)
1928{
1929	int ret;
1930
1931	BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
1932	BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
1933	BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
1934	BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
1935	BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
1936	BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
1937	BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
1938	BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
1939	BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
1940	BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
1941	BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
1942	BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
1943	BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
1944	BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);
1945
1946	ret = tcm_qla2xxx_register_configfs();
1947	if (ret < 0)
1948		return ret;
1949
1950	return 0;
1951}
1952
1953static void __exit tcm_qla2xxx_exit(void)
1954{
1955	tcm_qla2xxx_deregister_configfs();
1956}
1957
1958MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1959MODULE_LICENSE("GPL");
1960module_init(tcm_qla2xxx_init);
1961module_exit(tcm_qla2xxx_exit);