// SPDX-License-Identifier: GPL-2.0-or-later
/*******************************************************************************
 * This file contains tcm implementation using v4 configfs fabric infrastructure
 * for QLogic target mode HBAs
 *
 * (c) Copyright 2010-2013 Datera, Inc.
 *
 * Author: Nicholas A. Bellinger <nab@daterainc.com>
 *
 * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
 * the TCM_FC / Open-FCoE.org fabric module.
 *
 * Copyright (c) 2010 Cisco Systems, Inc
 *
 ****************************************************************************/


#include <linux/module.h>
#include <linux/utsname.h>
#include <linux/vmalloc.h>
#include <linux/hex.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/configfs.h>
#include <linux/ctype.h>
#include <linux/unaligned.h>
#include <scsi/scsi_host.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>

#include "qla_def.h"
#include "qla_target.h"
#include "tcm_qla2xxx.h"

static struct workqueue_struct *tcm_qla2xxx_free_wq;

/*
 * Parse WWN.
 * If strict, we require lower-case hex and colon separators to be sure
 * the name is the same as what would be generated by ft_format_wwn()
 * so the name and wwn are mapped one-to-one.
 */
static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
{
        const char *cp;
        char c;
        u32 nibble;
        u32 byte = 0;
        u32 pos = 0;
        u32 err;

        *wwn = 0;
        for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
                c = *cp;
                if (c == '\n' && cp[1] == '\0')
                        continue;
                if (strict && pos++ == 2 && byte++ < 7) {
                        pos = 0;
                        if (c == ':')
                                continue;
                        err = 1;
                        goto fail;
                }
                if (c == '\0') {
                        err = 2;
                        if (strict && byte != 8)
                                goto fail;
                        return cp - name;
                }
                err = 3;
                if (isdigit(c))
                        nibble = c - '0';
                else if (isxdigit(c) && (islower(c) || !strict))
                        nibble = tolower(c) - 'a' + 10;
                else
                        goto fail;
                *wwn = (*wwn << 4) | nibble;
        }
        err = 4;
fail:
        pr_debug("err %u len %zu pos %u byte %u\n",
                        err, cp - name, pos, byte);
        return -1;
}

static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
{
        u8 b[8];

        put_unaligned_be64(wwn, b);
        return snprintf(buf, len,
                "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
                b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
}

/*
 * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 */
static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
{
        unsigned int i, j;
        u8 wwn[8];

        memset(wwn, 0, sizeof(wwn));

        /* Validate and store the new name */
        for (i = 0, j = 0; i < 16; i++) {
                int value;

                value = hex_to_bin(*ns++);
                if (value >= 0)
                        j = (j << 4) | value;
                else
                        return -EINVAL;

                if (i % 2) {
                        wwn[i/2] = j & 0xff;
                        j = 0;
                }
        }

        *nm = wwn_to_u64(wwn);
        return 0;
}

/*
 * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 * store_fc_host_vport_create()
 */
static int tcm_qla2xxx_npiv_parse_wwn(
        const char *name,
        size_t count,
        u64 *wwpn,
        u64 *wwnn)
{
        unsigned int cnt = count;
        int rc;

        *wwpn = 0;
        *wwnn = 0;

        /* count may include a LF at end of string */
        if (name[cnt-1] == '\n' || name[cnt-1] == 0)
                cnt--;

        /* validate we have enough characters for WWPN */
        if ((cnt != (16+1+16)) || (name[16] != ':'))
                return -EINVAL;

        rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
        if (rc != 0)
                return rc;

        rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
        if (rc != 0)
                return rc;

        return 0;
}

static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);
        struct tcm_qla2xxx_lport *lport = tpg->lport;

        return lport->lport_naa_name;
}

static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);
        return tpg->lport_tpgt;
}

static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return tpg->tpg_attrib.generate_node_acls;
}

static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return tpg->tpg_attrib.cache_dynamic_acls;
}

static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return tpg->tpg_attrib.demo_mode_write_protect;
}

static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return tpg->tpg_attrib.prod_mode_write_protect;
}

static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return tpg->tpg_attrib.demo_mode_login_only;
}

static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return tpg->tpg_attrib.fabric_prot_type;
}

static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return tpg->lport_tpgt;
}

static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
{
        struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
                        struct qla_tgt_mgmt_cmd, free_work);

        transport_generic_free_cmd(&mcmd->se_cmd, 0);
}

/*
 * Called from qla_target_template->free_mcmd(), and will call
 * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 * release callback.  qla_hw_data->hardware_lock is expected to be held
 */
static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
{
        if (!mcmd)
                return;
        INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
        queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
}

static void tcm_qla2xxx_complete_free(struct work_struct *work)
{
        struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
        unsigned long flags;

        cmd->cmd_in_wq = 0;

        WARN_ON(cmd->trc_flags & TRC_CMD_FREE);

        /* To do: protect all tgt_counters manipulations with proper locking. */
        cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
        cmd->trc_flags |= TRC_CMD_FREE;
        cmd->cmd_sent_to_fw = 0;

        spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
        list_del_init(&cmd->sess_cmd_list);
        spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);

        transport_generic_free_cmd(&cmd->se_cmd, 0);
}

static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess)
{
        struct se_session *se_sess = sess->se_sess;
        struct qla_tgt_cmd *cmd;
        int tag, cpu;

        tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
        if (tag < 0)
                return NULL;

        cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
        memset(cmd, 0, sizeof(struct qla_tgt_cmd));
        cmd->se_cmd.map_tag = tag;
        cmd->se_cmd.map_cpu = cpu;

        return cmd;
}

static int tcm_qla2xxx_get_cmd_ref(struct qla_tgt_cmd *cmd)
{
        return target_get_sess_cmd(&cmd->se_cmd, true);
}

static void tcm_qla2xxx_put_cmd_ref(struct qla_tgt_cmd *cmd)
{
        target_put_sess_cmd(&cmd->se_cmd);
}

static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
{
        target_free_tag(cmd->sess->se_sess, &cmd->se_cmd);
}

/*
 * Called from qla_target_template->free_cmd(), and will call
 * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 * release callback.  qla_hw_data->hardware_lock is expected to be held
 */
static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
{
        cmd->state = QLA_TGT_STATE_DONE;

        cmd->qpair->tgt_counters.core_qla_free_cmd++;
        cmd->cmd_in_wq = 1;

        WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
        cmd->trc_flags |= TRC_CMD_DONE;

        INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
        queue_work(tcm_qla2xxx_free_wq, &cmd->work);
}

/*
 * Called from struct target_core_fabric_ops->check_stop_free() context
 */
static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
{
        struct qla_tgt_cmd *cmd;

        if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
                cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
                cmd->trc_flags |= TRC_CMD_CHK_STOP;
        }

        return target_put_sess_cmd(se_cmd);
}

/* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 * fabric descriptor @se_cmd command to release
 */
static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
{
        struct qla_tgt_cmd *cmd;

        if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
                struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
                                struct qla_tgt_mgmt_cmd, se_cmd);
                qlt_free_mcmd(mcmd);
                return;
        }
        cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);

        if (WARN_ON(cmd->cmd_sent_to_fw))
                return;

        qlt_free_cmd(cmd);
}

static void tcm_qla2xxx_release_session(struct kref *kref)
{
        struct fc_port  *sess = container_of(kref,
            struct fc_port, sess_kref);

        qlt_unreg_sess(sess);
}

static void tcm_qla2xxx_put_sess(struct fc_port *sess)
{
        if (!sess)
                return;

        kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
}

static void tcm_qla2xxx_close_session(struct se_session *se_sess)
{
        struct fc_port *sess = se_sess->fabric_sess_ptr;

        BUG_ON(!sess);

        target_stop_session(se_sess);

        sess->explicit_logout = 1;
        tcm_qla2xxx_put_sess(sess);
}

static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
{
        struct qla_tgt_cmd *cmd = container_of(se_cmd,
                                struct qla_tgt_cmd, se_cmd);

        if (cmd->aborted) {
                /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
                 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
                 * already kick start the free.
                 */
                pr_debug("write_pending aborted cmd[%p] refcount %d "
                        "transport_state %x, t_state %x, se_cmd_flags %x\n",
                        cmd, kref_read(&cmd->se_cmd.cmd_kref),
                        cmd->se_cmd.transport_state,
                        cmd->se_cmd.t_state,
                        cmd->se_cmd.se_cmd_flags);
                transport_generic_request_failure(&cmd->se_cmd,
                        TCM_CHECK_CONDITION_ABORT_CMD);
                return 0;
        }
        cmd->trc_flags |= TRC_XFR_RDY;
        cmd->bufflen = se_cmd->data_length;
        cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);

        cmd->sg_cnt = se_cmd->t_data_nents;
        cmd->sg = se_cmd->t_data_sg;

        cmd->prot_sg_cnt = se_cmd->t_prot_nents;
        cmd->prot_sg = se_cmd->t_prot_sg;
        cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
        se_cmd->pi_err = 0;

        /*
         * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
         * the SGL mappings into PCIe memory for incoming FCP WRITE data.
         */
        return qlt_rdy_to_xfer(cmd);
}

static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
{
        if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
                struct qla_tgt_cmd *cmd = container_of(se_cmd,
                                struct qla_tgt_cmd, se_cmd);
                return cmd->state;
        }

        return 0;
}

/*
 * Called from process context in qla_target.c:qlt_do_work() code
 */
static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
        unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
        int data_dir, int bidi)
{
        struct se_cmd *se_cmd = &cmd->se_cmd;
        struct se_session *se_sess;
        struct fc_port *sess;
#ifdef CONFIG_TCM_QLA2XXX_DEBUG
        struct se_portal_group *se_tpg;
        struct tcm_qla2xxx_tpg *tpg;
#endif
        int rc, target_flags = TARGET_SCF_ACK_KREF;
        unsigned long flags;

        if (bidi)
                target_flags |= TARGET_SCF_BIDI_OP;

        if (se_cmd->cpuid != WORK_CPU_UNBOUND)
                target_flags |= TARGET_SCF_USE_CPUID;

        sess = cmd->sess;
        if (!sess) {
                pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
                return -EINVAL;
        }

        se_sess = sess->se_sess;
        if (!se_sess) {
                pr_err("Unable to locate active struct se_session\n");
                return -EINVAL;
        }

#ifdef CONFIG_TCM_QLA2XXX_DEBUG
        se_tpg = se_sess->se_tpg;
        tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
        if (unlikely(tpg->tpg_attrib.jam_host)) {
                /* return, and dont run target_submit_cmd,discarding command */
                return 0;
        }
#endif
        cmd->qpair->tgt_counters.qla_core_sbt_cmd++;

        spin_lock_irqsave(&sess->sess_cmd_lock, flags);
        list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list);
        spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);

        rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0],
                             cmd->unpacked_lun, data_length, fcp_task_attr,
                             data_dir, target_flags);
        if (rc)
                return rc;

        if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0,
                               GFP_KERNEL))
                return 0;

        target_submit(se_cmd);
        return 0;
}

static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
{
        struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);

        /*
         * Ensure that the complete FCP WRITE payload has been received.
         * Otherwise return an exception via CHECK_CONDITION status.
         */
        cmd->cmd_in_wq = 0;
        cmd->cmd_sent_to_fw = 0;
        if (cmd->aborted) {
                transport_generic_request_failure(&cmd->se_cmd,
                        TCM_CHECK_CONDITION_ABORT_CMD);
                return;
        }

        cmd->qpair->tgt_counters.qla_core_ret_ctio++;
        if (!cmd->write_data_transferred) {
                switch (cmd->dif_err_code) {
                case DIF_ERR_GRD:
                        cmd->se_cmd.pi_err =
                            TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
                        break;
                case DIF_ERR_REF:
                        cmd->se_cmd.pi_err =
                            TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
                        break;
                case DIF_ERR_APP:
                        cmd->se_cmd.pi_err =
                            TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
                        break;
                case DIF_ERR_NONE:
                default:
                        break;
                }

                if (cmd->se_cmd.pi_err)
                        transport_generic_request_failure(&cmd->se_cmd,
                                cmd->se_cmd.pi_err);
                else if (cmd->srr_failed)
                        transport_generic_request_failure(&cmd->se_cmd,
                                TCM_SNACK_REJECTED);
                else
                        transport_generic_request_failure(&cmd->se_cmd,
                                TCM_CHECK_CONDITION_ABORT_CMD);

                return;
        }

        return target_execute_cmd(&cmd->se_cmd);
}

/*
 * Called from qla_target.c:qlt_do_ctio_completion()
 */
static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
{
        cmd->trc_flags |= TRC_DATA_IN;
        cmd->cmd_in_wq = 1;
        INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
        queue_work(tcm_qla2xxx_free_wq, &cmd->work);
}

static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
{
        return 0;
}

static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
    uint16_t *pfw_prot_opts)
{
        struct se_cmd *se_cmd = &cmd->se_cmd;

        if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
                *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;

        if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
                *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;

        return 0;
}

/*
 * Called from qla_target.c:qlt_issue_task_mgmt()
 */
static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
        uint16_t tmr_func, uint32_t tag)
{
        struct fc_port *sess = mcmd->sess;
        struct se_cmd *se_cmd = &mcmd->se_cmd;
        int transl_tmr_func = 0;

        switch (tmr_func) {
        case QLA_TGT_ABTS:
                pr_debug("%ld: ABTS received\n", sess->vha->host_no);
                transl_tmr_func = TMR_ABORT_TASK;
                break;
        case QLA_TGT_2G_ABORT_TASK:
                pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
                transl_tmr_func = TMR_ABORT_TASK;
                break;
        case QLA_TGT_CLEAR_ACA:
                pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
                transl_tmr_func = TMR_CLEAR_ACA;
                break;
        case QLA_TGT_TARGET_RESET:
                pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
                transl_tmr_func = TMR_TARGET_WARM_RESET;
                break;
        case QLA_TGT_LUN_RESET:
                pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
                transl_tmr_func = TMR_LUN_RESET;
                break;
        case QLA_TGT_CLEAR_TS:
                pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
                transl_tmr_func = TMR_CLEAR_TASK_SET;
                break;
        case QLA_TGT_ABORT_TS:
                pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
                transl_tmr_func = TMR_ABORT_TASK_SET;
                break;
        default:
                pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
                    sess->vha->host_no, tmr_func);
                return -ENOSYS;
        }

        return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
            transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
}

static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
    uint64_t tag)
{
        struct qla_tgt_cmd *cmd;
        unsigned long flags;

        if (!sess->se_sess)
                return NULL;

        spin_lock_irqsave(&sess->sess_cmd_lock, flags);
        list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) {
                if (cmd->se_cmd.tag == tag)
                        goto done;
        }
        cmd = NULL;
done:
        spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);

        return cmd;
}

static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
{
        struct qla_tgt_cmd *cmd = container_of(se_cmd,
                                struct qla_tgt_cmd, se_cmd);

        if (cmd->aborted) {
                /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
                 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
                 * already kick start the free.
                 */
                pr_debug("queue_data_in aborted cmd[%p] refcount %d "
                        "transport_state %x, t_state %x, se_cmd_flags %x\n",
                        cmd, kref_read(&cmd->se_cmd.cmd_kref),
                        cmd->se_cmd.transport_state,
                        cmd->se_cmd.t_state,
                        cmd->se_cmd.se_cmd_flags);
                return 0;
        }

        cmd->trc_flags |= TRC_XMIT_DATA;
        cmd->bufflen = se_cmd->data_length;
        cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);

        cmd->sg_cnt = se_cmd->t_data_nents;
        cmd->sg = se_cmd->t_data_sg;
        cmd->offset = 0;

        cmd->prot_sg_cnt = se_cmd->t_prot_nents;
        cmd->prot_sg = se_cmd->t_prot_sg;
        cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
        se_cmd->pi_err = 0;

        /*
         * Now queue completed DATA_IN the qla2xxx LLD and response ring
         */
        return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
                                se_cmd->scsi_status);
}

static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
{
        struct qla_tgt_cmd *cmd = container_of(se_cmd,
                                struct qla_tgt_cmd, se_cmd);
        int xmit_type = QLA_TGT_XMIT_STATUS;

        if (cmd->aborted) {
                /*
                 * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
                 * can get ahead of this cmd. tcm_qla2xxx_aborted_task
                 * already kick start the free.
                 */
                pr_debug(
                    "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
                    cmd, kref_read(&cmd->se_cmd.cmd_kref),
                    cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
                    cmd->se_cmd.se_cmd_flags);
                return 0;
        }
        cmd->bufflen = se_cmd->data_length;
        cmd->sg = NULL;
        cmd->sg_cnt = 0;
        cmd->offset = 0;
        cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
        cmd->trc_flags |= TRC_XMIT_STATUS;

        if (se_cmd->data_direction == DMA_FROM_DEVICE) {
                /*
                 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
                 * for qla_tgt_xmit_response LLD code
                 */
                if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
                        se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
                        se_cmd->residual_count = 0;
                }
                se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
                se_cmd->residual_count += se_cmd->data_length;

                cmd->bufflen = 0;
        }
        /*
         * Now queue status response to qla2xxx LLD code and response ring
         */
        return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
}

static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
{
        struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
        struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
                                struct qla_tgt_mgmt_cmd, se_cmd);

        pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
                        mcmd, se_tmr->function, se_tmr->response);
        /*
         * Do translation between TCM TM response codes and
         * QLA2xxx FC TM response codes.
         */
        switch (se_tmr->response) {
        case TMR_FUNCTION_COMPLETE:
                mcmd->fc_tm_rsp = FC_TM_SUCCESS;
                break;
        case TMR_TASK_DOES_NOT_EXIST:
                mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
                break;
        case TMR_FUNCTION_REJECTED:
                mcmd->fc_tm_rsp = FC_TM_REJECT;
                break;
        case TMR_LUN_DOES_NOT_EXIST:
        default:
                mcmd->fc_tm_rsp = FC_TM_FAILED;
                break;
        }
        /*
         * Queue the TM response to QLA2xxx LLD to build a
         * CTIO response packet.
         */
        qlt_xmit_tm_rsp(mcmd);
}

static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
{
        struct qla_tgt_cmd *cmd;
        unsigned long flags;

        if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
                return;

        cmd  = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);

        spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
        list_del_init(&cmd->sess_cmd_list);
        spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);

        qlt_abort_cmd(cmd);
}

static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
                        struct tcm_qla2xxx_nacl *, struct fc_port *);
/*
 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 */
static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
{
        struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
        struct se_portal_group *se_tpg = se_nacl->se_tpg;
        struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
        struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
                                struct tcm_qla2xxx_lport, lport_wwn);
        struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
                                struct tcm_qla2xxx_nacl, se_node_acl);
        void *node;

        pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);

        node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
        if (WARN_ON(node && (node != se_nacl))) {
                /*
                 * The nacl no longer matches what we think it should be.
                 * Most likely a new dynamic acl has been added while
                 * someone dropped the hardware lock.  It clearly is a
                 * bug elsewhere, but this bit can't make things worse.
                 */
                btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
                               node, GFP_ATOMIC);
        }

        pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
            se_nacl, nacl->nport_wwnn, nacl->nport_id);
        /*
         * Now clear the se_nacl and session pointers from our HW lport lookup
         * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
         *
         * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
         * target_wait_for_sess_cmds() before the session waits for outstanding
         * I/O to complete, to avoid a race between session shutdown execution
         * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
         */
        tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
}

static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
{
        target_stop_session(sess->se_sess);
}

static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
                const char *name)
{
        struct tcm_qla2xxx_nacl *nacl =
                container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
        u64 wwnn;

        if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
                return -EINVAL;

        nacl->nport_wwnn = wwnn;
        tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);

        return 0;
}

/* Start items for tcm_qla2xxx_tpg_attrib_cit */

#define DEF_QLA_TPG_ATTRIB(name)                                        \
                                                                        \
static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
                struct config_item *item, char *page)                   \
{                                                                       \
        struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
                        struct tcm_qla2xxx_tpg, se_tpg);                \
                                                                        \
        return sprintf(page, "%d\n", tpg->tpg_attrib.name);     \
}                                                                       \
                                                                        \
static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
                struct config_item *item, const char *page, size_t count) \
{                                                                       \
        struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
                        struct tcm_qla2xxx_tpg, se_tpg);                \
        struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
        unsigned long val;                                              \
        int ret;                                                        \
                                                                        \
        ret = kstrtoul(page, 0, &val);                                  \
        if (ret < 0) {                                                  \
                pr_err("kstrtoul() failed with"                         \
                                " ret: %d\n", ret);                     \
                return -EINVAL;                                         \
        }                                                               \
                                                                        \
        if ((val != 0) && (val != 1)) {                                 \
                pr_err("Illegal boolean value %lu\n", val);             \
                return -EINVAL;                                         \
        }                                                               \
                                                                        \
        a->name = val;                                                  \
                                                                        \
        return count;                                                   \
}                                                                       \
CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)

DEF_QLA_TPG_ATTRIB(generate_node_acls);
DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
#ifdef CONFIG_TCM_QLA2XXX_DEBUG
DEF_QLA_TPG_ATTRIB(jam_host);
#endif

static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
        &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
        &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
        &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
        &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
        &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
#ifdef CONFIG_TCM_QLA2XXX_DEBUG
        &tcm_qla2xxx_tpg_attrib_attr_jam_host,
#endif
        NULL,
};

/* End items for tcm_qla2xxx_tpg_attrib_cit */

static int tcm_qla2xxx_enable_tpg(struct se_portal_group *se_tpg,
                                  bool enable)
{
        struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
        struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
                        struct tcm_qla2xxx_lport, lport_wwn);
        struct scsi_qla_host *vha = lport->qla_vha;
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                        struct tcm_qla2xxx_tpg, se_tpg);

        if (enable) {
                if (atomic_read(&tpg->lport_tpg_enabled))
                        return -EEXIST;

                atomic_set(&tpg->lport_tpg_enabled, 1);
                qlt_enable_vha(vha);
        } else {
                if (!atomic_read(&tpg->lport_tpg_enabled))
                        return 0;

                atomic_set(&tpg->lport_tpg_enabled, 0);
                qlt_stop_phase1(vha->vha_tgt.qla_tgt);
                qlt_stop_phase2(vha->vha_tgt.qla_tgt);
        }

        return 0;
}

static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
                char *page)
{
        return target_show_dynamic_sessions(to_tpg(item), page);
}

static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
                const char *page, size_t count)
{
        struct se_portal_group *se_tpg = to_tpg(item);
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);
        unsigned long val;
        int ret = kstrtoul(page, 0, &val);

        if (ret) {
                pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
                return ret;
        }
        if (val != 0 && val != 1 && val != 3) {
                pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
                return -EINVAL;
        }
        tpg->tpg_attrib.fabric_prot_type = val;

        return count;
}

static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
                char *page)
{
        struct se_portal_group *se_tpg = to_tpg(item);
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);

        return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
}

CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);

static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
        &tcm_qla2xxx_tpg_attr_dynamic_sessions,
        &tcm_qla2xxx_tpg_attr_fabric_prot_type,
        NULL,
};

static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
                                                    const char *name)
{
        struct tcm_qla2xxx_lport *lport = container_of(wwn,
                        struct tcm_qla2xxx_lport, lport_wwn);
        struct tcm_qla2xxx_tpg *tpg;
        unsigned long tpgt;
        int ret;

        if (strstr(name, "tpgt_") != name)
                return ERR_PTR(-EINVAL);
        if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
                return ERR_PTR(-EINVAL);

        if ((tpgt != 1)) {
                pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
                return ERR_PTR(-ENOSYS);
        }

        tpg = kzalloc_obj(struct tcm_qla2xxx_tpg);
        if (!tpg) {
                pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
                return ERR_PTR(-ENOMEM);
        }
        tpg->lport = lport;
        tpg->lport_tpgt = tpgt;
        /*
         * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
         * NodeACLs
         */
        tpg->tpg_attrib.generate_node_acls = 1;
        tpg->tpg_attrib.demo_mode_write_protect = 1;
        tpg->tpg_attrib.cache_dynamic_acls = 1;
        tpg->tpg_attrib.demo_mode_login_only = 1;
        tpg->tpg_attrib.jam_host = 0;

        ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
        if (ret < 0) {
                kfree(tpg);
                return NULL;
        }

        lport->tpg_1 = tpg;

        return &tpg->se_tpg;
}

static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                        struct tcm_qla2xxx_tpg, se_tpg);
        struct tcm_qla2xxx_lport *lport = tpg->lport;
        struct scsi_qla_host *vha = lport->qla_vha;
        /*
         * Call into qla2x_target.c LLD logic to shutdown the active
         * FC Nexuses and disable target mode operation for this qla_hw_data
         */
        if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
                qlt_stop_phase1(vha->vha_tgt.qla_tgt);

        core_tpg_deregister(se_tpg);
        /*
         * Clear local TPG=1 pointer for non NPIV mode.
         */
        lport->tpg_1 = NULL;
        kfree(tpg);
}

static int tcm_qla2xxx_npiv_enable_tpg(struct se_portal_group *se_tpg,
                                    bool enable)
{
        struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
        struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
                        struct tcm_qla2xxx_lport, lport_wwn);
        struct scsi_qla_host *vha = lport->qla_vha;
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                        struct tcm_qla2xxx_tpg, se_tpg);

        if (enable) {
                if (atomic_read(&tpg->lport_tpg_enabled))
                        return -EEXIST;

                atomic_set(&tpg->lport_tpg_enabled, 1);
                qlt_enable_vha(vha);
        } else {
                if (!atomic_read(&tpg->lport_tpg_enabled))
                        return 0;

                atomic_set(&tpg->lport_tpg_enabled, 0);
                qlt_stop_phase1(vha->vha_tgt.qla_tgt);
                qlt_stop_phase2(vha->vha_tgt.qla_tgt);
        }

        return 0;
}

static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
                                                         const char *name)
{
        struct tcm_qla2xxx_lport *lport = container_of(wwn,
                        struct tcm_qla2xxx_lport, lport_wwn);
        struct tcm_qla2xxx_tpg *tpg;
        unsigned long tpgt;
        int ret;

        if (strstr(name, "tpgt_") != name)
                return ERR_PTR(-EINVAL);
        if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
                return ERR_PTR(-EINVAL);

        tpg = kzalloc_obj(struct tcm_qla2xxx_tpg);
        if (!tpg) {
                pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
                return ERR_PTR(-ENOMEM);
        }
        tpg->lport = lport;
        tpg->lport_tpgt = tpgt;

        /*
         * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
         * NodeACLs
         */
        tpg->tpg_attrib.generate_node_acls = 1;
        tpg->tpg_attrib.demo_mode_write_protect = 1;
        tpg->tpg_attrib.cache_dynamic_acls = 1;
        tpg->tpg_attrib.demo_mode_login_only = 1;

        ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
        if (ret < 0) {
                kfree(tpg);
                return NULL;
        }
        lport->tpg_1 = tpg;
        return &tpg->se_tpg;
}

/*
 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 */
static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
                                                     const be_id_t s_id)
{
        struct tcm_qla2xxx_lport *lport;
        struct se_node_acl *se_nacl;
        struct tcm_qla2xxx_nacl *nacl;
        u32 key;

        lport = vha->vha_tgt.target_lport_ptr;
        if (!lport) {
                pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
                dump_stack();
                return NULL;
        }

        key = sid_to_key(s_id);
        pr_debug("find_sess_by_s_id: 0x%06x\n", key);

        se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
        if (!se_nacl) {
                pr_debug("Unable to locate s_id: 0x%06x\n", key);
                return NULL;
        }
        pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
            se_nacl, se_nacl->initiatorname);

        nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
        if (!nacl->fc_port) {
                pr_err("Unable to locate struct fc_port\n");
                return NULL;
        }

        return nacl->fc_port;
}

/*
 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 */
static void tcm_qla2xxx_set_sess_by_s_id(
        struct tcm_qla2xxx_lport *lport,
        struct se_node_acl *new_se_nacl,
        struct tcm_qla2xxx_nacl *nacl,
        struct se_session *se_sess,
        struct fc_port *fc_port,
        be_id_t s_id)
{
        u32 key;
        void *slot;
        int rc;

        key = sid_to_key(s_id);
        pr_debug("set_sess_by_s_id: %06x\n", key);

        slot = btree_lookup32(&lport->lport_fcport_map, key);
        if (!slot) {
                if (new_se_nacl) {
                        pr_debug("Setting up new fc_port entry to new_se_nacl\n");
                        nacl->nport_id = key;
                        rc = btree_insert32(&lport->lport_fcport_map, key,
                                        new_se_nacl, GFP_ATOMIC);
                        if (rc)
                                printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
                                    (int)key);
                } else {
                        pr_debug("Wiping nonexisting fc_port entry\n");
                }

                fc_port->se_sess = se_sess;
                nacl->fc_port = fc_port;
                return;
        }

        if (nacl->fc_port) {
                if (new_se_nacl == NULL) {
                        pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
                        btree_remove32(&lport->lport_fcport_map, key);
                        nacl->fc_port = NULL;
                        return;
                }
                pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
                btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
                fc_port->se_sess = se_sess;
                nacl->fc_port = fc_port;
                return;
        }

        if (new_se_nacl == NULL) {
                pr_debug("Clearing existing fc_port entry\n");
                btree_remove32(&lport->lport_fcport_map, key);
                return;
        }

        pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
        btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
        fc_port->se_sess = se_sess;
        nacl->fc_port = fc_port;

        pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
            nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
}

/*
 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 */
static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
        scsi_qla_host_t *vha,
        const uint16_t loop_id)
{
        struct tcm_qla2xxx_lport *lport;
        struct se_node_acl *se_nacl;
        struct tcm_qla2xxx_nacl *nacl;
        struct tcm_qla2xxx_fc_loopid *fc_loopid;

        lport = vha->vha_tgt.target_lport_ptr;
        if (!lport) {
                pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
                dump_stack();
                return NULL;
        }

        pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);

        fc_loopid = lport->lport_loopid_map + loop_id;
        se_nacl = fc_loopid->se_nacl;
        if (!se_nacl) {
                pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
                    loop_id);
                return NULL;
        }

        nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);

        if (!nacl->fc_port) {
                pr_err("Unable to locate struct fc_port\n");
                return NULL;
        }

        return nacl->fc_port;
}

/*
 * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 */
static void tcm_qla2xxx_set_sess_by_loop_id(
        struct tcm_qla2xxx_lport *lport,
        struct se_node_acl *new_se_nacl,
        struct tcm_qla2xxx_nacl *nacl,
        struct se_session *se_sess,
        struct fc_port *fc_port,
        uint16_t loop_id)
{
        struct se_node_acl *saved_nacl;
        struct tcm_qla2xxx_fc_loopid *fc_loopid;

        pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);

        fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
                        lport->lport_loopid_map)[loop_id];

        saved_nacl = fc_loopid->se_nacl;
        if (!saved_nacl) {
                pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
                fc_loopid->se_nacl = new_se_nacl;
                if (fc_port->se_sess != se_sess)
                        fc_port->se_sess = se_sess;
                if (nacl->fc_port != fc_port)
                        nacl->fc_port = fc_port;
                return;
        }

        if (nacl->fc_port) {
                if (new_se_nacl == NULL) {
                        pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
                        fc_loopid->se_nacl = NULL;
                        nacl->fc_port = NULL;
                        return;
                }

                pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
                fc_loopid->se_nacl = new_se_nacl;
                if (fc_port->se_sess != se_sess)
                        fc_port->se_sess = se_sess;
                if (nacl->fc_port != fc_port)
                        nacl->fc_port = fc_port;
                return;
        }

        if (new_se_nacl == NULL) {
                pr_debug("Clearing fc_loopid->se_nacl\n");
                fc_loopid->se_nacl = NULL;
                return;
        }

        pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
        fc_loopid->se_nacl = new_se_nacl;
        if (fc_port->se_sess != se_sess)
                fc_port->se_sess = se_sess;
        if (nacl->fc_port != fc_port)
                nacl->fc_port = fc_port;

        pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
            nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
}

/*
 * Should always be called with qla_hw_data->tgt.sess_lock held.
 */
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
                struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
{
        struct se_session *se_sess = sess->se_sess;

        tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
                                     sess, port_id_to_be_id(sess->d_id));
        tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
                                sess, sess->loop_id);
}

static void tcm_qla2xxx_free_session(struct fc_port *sess)
{
        struct qla_tgt *tgt = sess->tgt;
        struct qla_hw_data *ha = tgt->ha;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
        struct se_session *se_sess;
        struct tcm_qla2xxx_lport *lport;

        se_sess = sess->se_sess;
        if (!se_sess) {
                pr_err("struct fc_port->se_sess is NULL\n");
                dump_stack();
                return;
        }

        lport = vha->vha_tgt.target_lport_ptr;
        if (!lport) {
                pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
                dump_stack();
                return;
        }
        target_wait_for_sess_cmds(se_sess);

        target_remove_session(se_sess);
}

static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
                                  struct se_session *se_sess, void *p)
{
        struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
                                struct tcm_qla2xxx_tpg, se_tpg);
        struct tcm_qla2xxx_lport *lport = tpg->lport;
        struct qla_hw_data *ha = lport->qla_vha->hw;
        struct se_node_acl *se_nacl = se_sess->se_node_acl;
        struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
                                struct tcm_qla2xxx_nacl, se_node_acl);
        struct fc_port *qlat_sess = p;
        uint16_t loop_id = qlat_sess->loop_id;
        unsigned long flags;

        /*
         * And now setup se_nacl and session pointers into HW lport internal
         * mappings for fabric S_ID and LOOP_ID.
         */
        spin_lock_irqsave(&ha->tgt.sess_lock, flags);
        tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
                                     port_id_to_be_id(qlat_sess->d_id));
        tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
                                        se_sess, qlat_sess, loop_id);
        spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);

        return 0;
}

/*
 * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
 * to locate struct se_node_acl
 */
static int tcm_qla2xxx_check_initiator_node_acl(
        scsi_qla_host_t *vha,
        unsigned char *fc_wwpn,
        struct fc_port *qlat_sess)
{
        struct qla_hw_data *ha = vha->hw;
        struct tcm_qla2xxx_lport *lport;
        struct tcm_qla2xxx_tpg *tpg;
        struct se_session *se_sess;
        unsigned char port_name[36];
        int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
                       TCM_QLA2XXX_DEFAULT_TAGS;

        lport = vha->vha_tgt.target_lport_ptr;
        if (!lport) {
                pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
                dump_stack();
                return -EINVAL;
        }
        /*
         * Locate the TPG=1 reference..
         */
        tpg = lport->tpg_1;
        if (!tpg) {
                pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
                return -EINVAL;
        }
        /*
         * Format the FCP Initiator port_name into colon seperated values to
         * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
         */
        memset(&port_name, 0, 36);
        snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
        /*
         * Locate our struct se_node_acl either from an explict NodeACL created
         * via ConfigFS, or via running in TPG demo mode.
         */
        se_sess = target_setup_session(&tpg->se_tpg, num_tags,
                                       sizeof(struct qla_tgt_cmd),
                                       TARGET_PROT_ALL, port_name,
                                       qlat_sess, tcm_qla2xxx_session_cb);
        if (IS_ERR(se_sess))
                return PTR_ERR(se_sess);

        return 0;
}

static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
                                    uint16_t loop_id, bool conf_compl_supported)
{
        struct qla_tgt *tgt = sess->tgt;
        struct qla_hw_data *ha = tgt->ha;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
        struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
        struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
        struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
                        struct tcm_qla2xxx_nacl, se_node_acl);
        u32 key;


        if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
                pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
                    sess, sess->port_name,
                    sess->loop_id, loop_id, sess->d_id.b.domain,
                    sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
                    s_id.b.area, s_id.b.al_pa);

        if (sess->loop_id != loop_id) {
                /*
                 * Because we can shuffle loop IDs around and we
                 * update different sessions non-atomically, we might
                 * have overwritten this session's old loop ID
                 * already, and we might end up overwriting some other
                 * session that will be updated later.  So we have to
                 * be extra careful and we can't warn about those things...
                 */
                if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
                        lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;

                lport->lport_loopid_map[loop_id].se_nacl = se_nacl;

                sess->loop_id = loop_id;
        }

        if (sess->d_id.b24 != s_id.b24) {
                key = (((u32) sess->d_id.b.domain << 16) |
                       ((u32) sess->d_id.b.area   <<  8) |
                       ((u32) sess->d_id.b.al_pa));

                if (btree_lookup32(&lport->lport_fcport_map, key))
                        WARN(btree_remove32(&lport->lport_fcport_map, key) !=
                            se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
                            sess->d_id.b.domain, sess->d_id.b.area,
                            sess->d_id.b.al_pa);
                else
                        WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
                             sess->d_id.b.domain, sess->d_id.b.area,
                             sess->d_id.b.al_pa);

                key = (((u32) s_id.b.domain << 16) |
                       ((u32) s_id.b.area   <<  8) |
                       ((u32) s_id.b.al_pa));

                if (btree_lookup32(&lport->lport_fcport_map, key)) {
                        WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
                             s_id.b.domain, s_id.b.area, s_id.b.al_pa);
                        btree_update32(&lport->lport_fcport_map, key, se_nacl);
                } else {
                        btree_insert32(&lport->lport_fcport_map, key, se_nacl,
                            GFP_ATOMIC);
                }

                sess->d_id = s_id;
                nacl->nport_id = key;
        }

        sess->conf_compl_supported = conf_compl_supported;

}

/*
 * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
 */
static const struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
        .find_cmd_by_tag        = tcm_qla2xxx_find_cmd_by_tag,
        .handle_cmd             = tcm_qla2xxx_handle_cmd,
        .handle_data            = tcm_qla2xxx_handle_data,
        .handle_tmr             = tcm_qla2xxx_handle_tmr,
        .get_cmd                = tcm_qla2xxx_get_cmd,
        .get_cmd_ref            = tcm_qla2xxx_get_cmd_ref,
        .put_cmd_ref            = tcm_qla2xxx_put_cmd_ref,
        .rel_cmd                = tcm_qla2xxx_rel_cmd,
        .free_cmd               = tcm_qla2xxx_free_cmd,
        .free_mcmd              = tcm_qla2xxx_free_mcmd,
        .free_session           = tcm_qla2xxx_free_session,
        .update_sess            = tcm_qla2xxx_update_sess,
        .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
        .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
        .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
        .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
        .put_sess               = tcm_qla2xxx_put_sess,
        .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
        .get_dif_tags           = tcm_qla2xxx_dif_tags,
        .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
};

static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
{
        int rc;
        size_t map_sz;

        rc = btree_init32(&lport->lport_fcport_map);
        if (rc) {
                pr_err("Unable to initialize lport->lport_fcport_map btree\n");
                return rc;
        }

        map_sz = array_size(65536, sizeof(struct tcm_qla2xxx_fc_loopid));

        lport->lport_loopid_map = vzalloc(map_sz);
        if (!lport->lport_loopid_map) {
                pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n", map_sz);
                btree_destroy32(&lport->lport_fcport_map);
                return -ENOMEM;
        }
        pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n", map_sz);
        return 0;
}

static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
                                         void *target_lport_ptr,
                                         u64 npiv_wwpn, u64 npiv_wwnn)
{
        struct qla_hw_data *ha = vha->hw;
        struct tcm_qla2xxx_lport *lport =
                        (struct tcm_qla2xxx_lport *)target_lport_ptr;
        /*
         * Setup tgt_ops, local pointer to vha and target_lport_ptr
         */
        ha->tgt.tgt_ops = &tcm_qla2xxx_template;
        vha->vha_tgt.target_lport_ptr = target_lport_ptr;
        lport->qla_vha = vha;

        return 0;
}

static struct se_wwn *tcm_qla2xxx_make_lport(
        struct target_fabric_configfs *tf,
        struct config_group *group,
        const char *name)
{
        struct tcm_qla2xxx_lport *lport;
        u64 wwpn;
        int ret = -ENODEV;

        if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
                return ERR_PTR(-EINVAL);

        lport = kzalloc_obj(struct tcm_qla2xxx_lport);
        if (!lport) {
                pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
                return ERR_PTR(-ENOMEM);
        }
        lport->lport_wwpn = wwpn;
        tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
                                wwpn);
        sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);

        ret = tcm_qla2xxx_init_lport(lport);
        if (ret != 0)
                goto out;

        ret = qlt_lport_register(lport, wwpn, 0, 0,
                                 tcm_qla2xxx_lport_register_cb);
        if (ret != 0)
                goto out_lport;

        return &lport->lport_wwn;
out_lport:
        vfree(lport->lport_loopid_map);
        btree_destroy32(&lport->lport_fcport_map);
out:
        kfree(lport);
        return ERR_PTR(ret);
}

static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
{
        struct tcm_qla2xxx_lport *lport = container_of(wwn,
                        struct tcm_qla2xxx_lport, lport_wwn);
        struct scsi_qla_host *vha = lport->qla_vha;
        struct se_node_acl *node;
        u32 key = 0;

        /*
         * Call into qla2x_target.c LLD logic to complete the
         * shutdown of struct qla_tgt after the call to
         * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
         */
        if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
                qlt_stop_phase2(vha->vha_tgt.qla_tgt);

        qlt_lport_deregister(vha);

        vfree(lport->lport_loopid_map);
        btree_for_each_safe32(&lport->lport_fcport_map, key, node)
                btree_remove32(&lport->lport_fcport_map, key);
        btree_destroy32(&lport->lport_fcport_map);
        kfree(lport);
}

static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
                                              void *target_lport_ptr,
                                              u64 npiv_wwpn, u64 npiv_wwnn)
{
        struct fc_vport *vport;
        struct Scsi_Host *sh = base_vha->host;
        struct scsi_qla_host *npiv_vha;
        struct tcm_qla2xxx_lport *lport =
                        (struct tcm_qla2xxx_lport *)target_lport_ptr;
        struct tcm_qla2xxx_lport *base_lport =
                        (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
        struct fc_vport_identifiers vport_id;

        if (qla_ini_mode_enabled(base_vha)) {
                pr_err("qla2xxx base_vha not enabled for target mode\n");
                return -EPERM;
        }

        if (!base_lport || !base_lport->tpg_1 ||
            !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
                pr_err("qla2xxx base_lport or tpg_1 not available\n");
                return -EPERM;
        }

        memset(&vport_id, 0, sizeof(vport_id));
        vport_id.port_name = npiv_wwpn;
        vport_id.node_name = npiv_wwnn;
        vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
        vport_id.vport_type = FC_PORTTYPE_NPIV;
        vport_id.disable = false;

        vport = fc_vport_create(sh, 0, &vport_id);
        if (!vport) {
                pr_err("fc_vport_create failed for qla2xxx_npiv\n");
                return -ENODEV;
        }
        /*
         * Setup local pointer to NPIV vhba + target_lport_ptr
         */
        npiv_vha = (struct scsi_qla_host *)vport->dd_data;
        npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
        lport->qla_vha = npiv_vha;
        scsi_host_get(npiv_vha->host);
        return 0;
}


static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
        struct target_fabric_configfs *tf,
        struct config_group *group,
        const char *name)
{
        struct tcm_qla2xxx_lport *lport;
        u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
        char *p, tmp[128];
        int ret;

        snprintf(tmp, 128, "%s", name);

        p = strchr(tmp, '@');
        if (!p) {
                pr_err("Unable to locate NPIV '@' separator\n");
                return ERR_PTR(-EINVAL);
        }
        *p++ = '\0';

        if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
                return ERR_PTR(-EINVAL);

        if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
                                       &npiv_wwpn, &npiv_wwnn) < 0)
                return ERR_PTR(-EINVAL);

        lport = kzalloc_obj(struct tcm_qla2xxx_lport);
        if (!lport) {
                pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
                return ERR_PTR(-ENOMEM);
        }
        lport->lport_npiv_wwpn = npiv_wwpn;
        lport->lport_npiv_wwnn = npiv_wwnn;
        sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);

        ret = tcm_qla2xxx_init_lport(lport);
        if (ret != 0)
                goto out;

        ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
                                 tcm_qla2xxx_lport_register_npiv_cb);
        if (ret != 0)
                goto out_lport;

        return &lport->lport_wwn;
out_lport:
        vfree(lport->lport_loopid_map);
        btree_destroy32(&lport->lport_fcport_map);
out:
        kfree(lport);
        return ERR_PTR(ret);
}

static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
{
        struct tcm_qla2xxx_lport *lport = container_of(wwn,
                        struct tcm_qla2xxx_lport, lport_wwn);
        struct scsi_qla_host *npiv_vha = lport->qla_vha;
        struct qla_hw_data *ha = npiv_vha->hw;
        scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);

        scsi_host_put(npiv_vha->host);
        /*
         * Notify libfc that we want to release the vha->fc_vport
         */
        fc_vport_terminate(npiv_vha->fc_vport);
        scsi_host_put(base_vha->host);
        kfree(lport);
}


static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
                char *page)
{
        return sprintf(page,
            "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
            QLA2XXX_VERSION, utsname()->sysname,
            utsname()->machine, utsname()->release);
}

CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);

static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
        &tcm_qla2xxx_wwn_attr_version,
        NULL,
};

static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
        .module                         = THIS_MODULE,
        .fabric_name                    = "qla2xxx",
        .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
        /*
         * XXX: Limit assumes single page per scatter-gather-list entry.
         * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
         */
        .max_data_sg_nents              = 1200,
        .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
        .tpg_get_tag                    = tcm_qla2xxx_get_tag,
        .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
        .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
        .tpg_check_demo_mode_write_protect =
                                        tcm_qla2xxx_check_demo_write_protect,
        .tpg_check_prod_mode_write_protect =
                                        tcm_qla2xxx_check_prod_write_protect,
        .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
        .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
        .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
        .check_stop_free                = tcm_qla2xxx_check_stop_free,
        .release_cmd                    = tcm_qla2xxx_release_cmd,
        .close_session                  = tcm_qla2xxx_close_session,
        .sess_get_initiator_sid         = NULL,
        .write_pending                  = tcm_qla2xxx_write_pending,
        .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
        .queue_data_in                  = tcm_qla2xxx_queue_data_in,
        .queue_status                   = tcm_qla2xxx_queue_status,
        .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
        .aborted_task                   = tcm_qla2xxx_aborted_task,
        /*
         * Setup function pointers for generic logic in
         * target_core_fabric_configfs.c
         */
        .fabric_make_wwn                = tcm_qla2xxx_make_lport,
        .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
        .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
        .fabric_enable_tpg              = tcm_qla2xxx_enable_tpg,
        .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
        .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,

        .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
        .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
        .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,

        .default_submit_type            = TARGET_DIRECT_SUBMIT,
        .direct_submit_supp             = 1,
};

static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
        .module                         = THIS_MODULE,
        .fabric_name                    = "qla2xxx_npiv",
        .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
        .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
        .tpg_get_tag                    = tcm_qla2xxx_get_tag,
        .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
        .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
        .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
        .tpg_check_prod_mode_write_protect =
            tcm_qla2xxx_check_prod_write_protect,
        .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
        .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
        .check_stop_free                = tcm_qla2xxx_check_stop_free,
        .release_cmd                    = tcm_qla2xxx_release_cmd,
        .close_session                  = tcm_qla2xxx_close_session,
        .sess_get_initiator_sid         = NULL,
        .write_pending                  = tcm_qla2xxx_write_pending,
        .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
        .queue_data_in                  = tcm_qla2xxx_queue_data_in,
        .queue_status                   = tcm_qla2xxx_queue_status,
        .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
        .aborted_task                   = tcm_qla2xxx_aborted_task,
        /*
         * Setup function pointers for generic logic in
         * target_core_fabric_configfs.c
         */
        .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
        .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
        .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
        .fabric_enable_tpg              = tcm_qla2xxx_npiv_enable_tpg,
        .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
        .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,

        .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,

        .default_submit_type            = TARGET_DIRECT_SUBMIT,
        .direct_submit_supp             = 1,
};

static int tcm_qla2xxx_register_configfs(void)
{
        int ret;

        pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
            QLA2XXX_VERSION, utsname()->sysname,
            utsname()->machine, utsname()->release);

        ret = target_register_template(&tcm_qla2xxx_ops);
        if (ret)
                return ret;

        ret = target_register_template(&tcm_qla2xxx_npiv_ops);
        if (ret)
                goto out_fabric;

        tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
                                                WQ_MEM_RECLAIM | WQ_PERCPU, 0);
        if (!tcm_qla2xxx_free_wq) {
                ret = -ENOMEM;
                goto out_fabric_npiv;
        }

        return 0;

out_fabric_npiv:
        target_unregister_template(&tcm_qla2xxx_npiv_ops);
out_fabric:
        target_unregister_template(&tcm_qla2xxx_ops);
        return ret;
}

static void tcm_qla2xxx_deregister_configfs(void)
{
        destroy_workqueue(tcm_qla2xxx_free_wq);

        target_unregister_template(&tcm_qla2xxx_ops);
        target_unregister_template(&tcm_qla2xxx_npiv_ops);
}

static int __init tcm_qla2xxx_init(void)
{
        int ret;

        BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
        BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
        BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
        BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
        BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
        BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
        BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
        BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
        BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
        BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
        BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
        BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
        BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
        BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);

        ret = tcm_qla2xxx_register_configfs();
        if (ret < 0)
                return ret;

        return 0;
}

static void __exit tcm_qla2xxx_exit(void)
{
        tcm_qla2xxx_deregister_configfs();
}

MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
MODULE_LICENSE("GPL");
module_init(tcm_qla2xxx_init);
module_exit(tcm_qla2xxx_exit);