// SPDX-License-Identifier: GPL-2.0-only
/*
 * This file is part of the Emulex Linux Device Driver for Enterprise iSCSI
 * Host Bus Adapters. Refer to the README file included with this package
 * for driver version and adapter compatibility.
 *
 * Copyright (c) 2018 Broadcom. All Rights Reserved.
 * The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
 *
 * Contact Information:
 * linux-drivers@broadcom.com
 */

#include <scsi/libiscsi.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_netlink.h>
#include <net/netlink.h>
#include <scsi/scsi.h>

#include "be_iscsi.h"

extern struct iscsi_transport beiscsi_iscsi_transport;

/**
 * beiscsi_session_create - creates a new iscsi session
 * @ep: pointer to iscsi ep
 * @cmds_max: max commands supported
 * @qdepth: max queue depth supported
 * @initial_cmdsn: initial iscsi CMDSN
 */
struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
                                                 u16 cmds_max,
                                                 u16 qdepth,
                                                 u32 initial_cmdsn)
{
        struct Scsi_Host *shost;
        struct beiscsi_endpoint *beiscsi_ep;
        struct iscsi_cls_session *cls_session;
        struct beiscsi_hba *phba;
        struct iscsi_session *sess;
        struct beiscsi_session *beiscsi_sess;
        struct beiscsi_io_task *io_task;


        if (!ep) {
                pr_err("beiscsi_session_create: invalid ep\n");
                return NULL;
        }
        beiscsi_ep = ep->dd_data;
        phba = beiscsi_ep->phba;

        if (!beiscsi_hba_is_online(phba)) {
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : HBA in error 0x%lx\n", phba->state);
                return NULL;
        }

        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_session_create\n");
        if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : Cannot handle %d cmds."
                            "Max cmds per session supported is %d. Using %d."
                            "\n", cmds_max,
                            beiscsi_ep->phba->params.wrbs_per_cxn,
                            beiscsi_ep->phba->params.wrbs_per_cxn);

                cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
        }

        shost = phba->shost;
        cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
                                          shost, cmds_max,
                                          sizeof(*beiscsi_sess),
                                          sizeof(*io_task),
                                          initial_cmdsn, ISCSI_MAX_TARGET);
        if (!cls_session)
                return NULL;
        sess = cls_session->dd_data;
        beiscsi_sess = sess->dd_data;
        beiscsi_sess->bhs_pool =  dma_pool_create("beiscsi_bhs_pool",
                                                   &phba->pcidev->dev,
                                                   sizeof(struct be_cmd_bhs),
                                                   64, 0);
        if (!beiscsi_sess->bhs_pool)
                goto destroy_sess;

        return cls_session;
destroy_sess:
        iscsi_session_teardown(cls_session);
        return NULL;
}

/**
 * beiscsi_session_destroy - destroys iscsi session
 * @cls_session:        pointer to iscsi cls session
 *
 * Destroys iSCSI session instance and releases
 * resources allocated for it.
 */
void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
{
        struct iscsi_session *sess = cls_session->dd_data;
        struct beiscsi_session *beiscsi_sess = sess->dd_data;

        printk(KERN_INFO "In beiscsi_session_destroy\n");
        dma_pool_destroy(beiscsi_sess->bhs_pool);
        iscsi_session_teardown(cls_session);
}

/**
 * beiscsi_session_fail(): Closing session with appropriate error
 * @cls_session: ptr to session
 **/
void beiscsi_session_fail(struct iscsi_cls_session *cls_session)
{
        iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
}


/**
 * beiscsi_conn_create - create an instance of iscsi connection
 * @cls_session: ptr to iscsi_cls_session
 * @cid: iscsi cid
 */
struct iscsi_cls_conn *
beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
{
        struct beiscsi_hba *phba;
        struct Scsi_Host *shost;
        struct iscsi_cls_conn *cls_conn;
        struct beiscsi_conn *beiscsi_conn;
        struct iscsi_conn *conn;
        struct iscsi_session *sess;
        struct beiscsi_session *beiscsi_sess;

        shost = iscsi_session_to_shost(cls_session);
        phba = iscsi_host_priv(shost);

        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_conn_create ,cid"
                    "from iscsi layer=%d\n", cid);

        cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
        if (!cls_conn)
                return NULL;

        conn = cls_conn->dd_data;
        beiscsi_conn = conn->dd_data;
        beiscsi_conn->ep = NULL;
        beiscsi_conn->phba = phba;
        beiscsi_conn->conn = conn;
        sess = cls_session->dd_data;
        beiscsi_sess = sess->dd_data;
        beiscsi_conn->beiscsi_sess = beiscsi_sess;
        return cls_conn;
}

/**
 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 * @cls_session: pointer to iscsi cls session
 * @cls_conn: pointer to iscsi cls conn
 * @transport_fd: EP handle(64 bit)
 * @is_leading: indicate if this is the session leading connection (MCS)
 *
 * This function binds the TCP Conn with iSCSI Connection and Session.
 */
int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
                      struct iscsi_cls_conn *cls_conn,
                      u64 transport_fd, int is_leading)
{
        struct iscsi_conn *conn = cls_conn->dd_data;
        struct beiscsi_conn *beiscsi_conn = conn->dd_data;
        struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
        struct hwi_wrb_context *pwrb_context;
        struct beiscsi_endpoint *beiscsi_ep;
        struct iscsi_endpoint *ep;
        uint16_t cri_index;
        int rc = 0;

        ep = iscsi_lookup_endpoint(transport_fd);
        if (!ep)
                return -EINVAL;

        beiscsi_ep = ep->dd_data;

        if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {
                rc = -EINVAL;
                goto put_ep;
        }

        if (beiscsi_ep->phba != phba) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
                            beiscsi_ep->phba, phba);
                rc = -EEXIST;
                goto put_ep;
        }
        cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
        if (phba->conn_table[cri_index]) {
                if (beiscsi_conn != phba->conn_table[cri_index] ||
                    beiscsi_ep != phba->conn_table[cri_index]->ep) {
                        __beiscsi_log(phba, KERN_ERR,
                                      "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
                                      cri_index,
                                      beiscsi_ep->ep_cid,
                                      beiscsi_conn,
                                      phba->conn_table[cri_index]);
                        rc = -EINVAL;
                        goto put_ep;
                }
        }

        beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
        beiscsi_conn->ep = beiscsi_ep;
        beiscsi_ep->conn = beiscsi_conn;
        /**
         * Each connection is associated with a WRBQ kept in wrb_context.
         * Store doorbell offset for transmit path.
         */
        pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
        beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : cid %d phba->conn_table[%u]=%p\n",
                    beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
        phba->conn_table[cri_index] = beiscsi_conn;

put_ep:
        iscsi_put_endpoint(ep);
        return rc;
}

static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
{
        if (phba->ipv4_iface)
                return 0;

        phba->ipv4_iface = iscsi_create_iface(phba->shost,
                                              &beiscsi_iscsi_transport,
                                              ISCSI_IFACE_TYPE_IPV4,
                                              0, 0);
        if (!phba->ipv4_iface) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : Could not "
                            "create default IPv4 address.\n");
                return -ENODEV;
        }

        return 0;
}

static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
{
        if (phba->ipv6_iface)
                return 0;

        phba->ipv6_iface = iscsi_create_iface(phba->shost,
                                              &beiscsi_iscsi_transport,
                                              ISCSI_IFACE_TYPE_IPV6,
                                              0, 0);
        if (!phba->ipv6_iface) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : Could not "
                            "create default IPv6 address.\n");
                return -ENODEV;
        }

        return 0;
}

void beiscsi_iface_create_default(struct beiscsi_hba *phba)
{
        struct be_cmd_get_if_info_resp *if_info;

        if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
                beiscsi_iface_create_ipv4(phba);
                kfree(if_info);
        }

        if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
                beiscsi_iface_create_ipv6(phba);
                kfree(if_info);
        }
}

void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
{
        if (phba->ipv6_iface) {
                iscsi_destroy_iface(phba->ipv6_iface);
                phba->ipv6_iface = NULL;
        }
        if (phba->ipv4_iface) {
                iscsi_destroy_iface(phba->ipv4_iface);
                phba->ipv4_iface = NULL;
        }
}

/**
 * beiscsi_iface_config_vlan()- Set the VLAN TAG
 * @shost: Scsi Host for the driver instance
 * @iface_param: Interface paramters
 *
 * Set the VLAN TAG for the adapter or disable
 * the VLAN config
 *
 * returns
 *      Success: 0
 *      Failure: Non-Zero Value
 **/
static int
beiscsi_iface_config_vlan(struct Scsi_Host *shost,
                          struct iscsi_iface_param_info *iface_param)
{
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        int ret = -EPERM;

        switch (iface_param->param) {
        case ISCSI_NET_PARAM_VLAN_ENABLED:
                ret = 0;
                if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
                        ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
                break;
        case ISCSI_NET_PARAM_VLAN_TAG:
                ret = beiscsi_if_set_vlan(phba,
                                          *((uint16_t *)iface_param->value));
                break;
        }
        return ret;
}


static int
beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
                          struct iscsi_iface_param_info *info,
                          void *data, uint32_t dt_len)
{
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        u8 *ip = NULL, *subnet = NULL, *gw;
        struct nlattr *nla;
        int ret = -EPERM;

        /* Check the param */
        switch (info->param) {
        case ISCSI_NET_PARAM_IFACE_ENABLE:
                if (info->value[0] == ISCSI_IFACE_ENABLE)
                        ret = beiscsi_iface_create_ipv4(phba);
                else {
                        iscsi_destroy_iface(phba->ipv4_iface);
                        phba->ipv4_iface = NULL;
                }
                break;
        case ISCSI_NET_PARAM_IPV4_GW:
                gw = info->value;
                ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
                break;
        case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
                if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
                        ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
                else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
                        /* release DHCP IP address */
                        ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
                                                   NULL, NULL);
                else
                        beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                                    "BS_%d : Invalid BOOTPROTO: %d\n",
                                    info->value[0]);
                break;
        case ISCSI_NET_PARAM_IPV4_ADDR:
                ip = info->value;
                nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
                if (nla) {
                        info = nla_data(nla);
                        subnet = info->value;
                }
                ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
                                           ip, subnet);
                break;
        case ISCSI_NET_PARAM_IPV4_SUBNET:
                /*
                 * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
                 * and subnet both. Find IP to be applied for this subnet.
                 */
                subnet = info->value;
                nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
                if (nla) {
                        info = nla_data(nla);
                        ip = info->value;
                }
                ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
                                           ip, subnet);
                break;
        }

        return ret;
}

static int
beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
                          struct iscsi_iface_param_info *iface_param,
                          void *data, uint32_t dt_len)
{
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        int ret = -EPERM;

        switch (iface_param->param) {
        case ISCSI_NET_PARAM_IFACE_ENABLE:
                if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
                        ret = beiscsi_iface_create_ipv6(phba);
                else {
                        iscsi_destroy_iface(phba->ipv6_iface);
                        phba->ipv6_iface = NULL;
                }
                break;
        case ISCSI_NET_PARAM_IPV6_ADDR:
                ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
                                           iface_param->value, NULL);
                break;
        }

        return ret;
}

int beiscsi_iface_set_param(struct Scsi_Host *shost,
                            void *data, uint32_t dt_len)
{
        struct iscsi_iface_param_info *iface_param = NULL;
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        struct nlattr *attrib;
        uint32_t rm_len = dt_len;
        int ret;

        if (!beiscsi_hba_is_online(phba)) {
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : HBA in error 0x%lx\n", phba->state);
                return -EBUSY;
        }

        /* update interface_handle */
        ret = beiscsi_if_get_handle(phba);
        if (ret) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : Getting Interface Handle Failed\n");
                return ret;
        }

        nla_for_each_attr(attrib, data, dt_len, rm_len) {
                /* ignore nla_type as it is never used */
                if (nla_len(attrib) < sizeof(*iface_param))
                        return -EINVAL;

                iface_param = nla_data(attrib);

                if (iface_param->param_type != ISCSI_NET_PARAM)
                        continue;

                /*
                 * BE2ISCSI only supports 1 interface
                 */
                if (iface_param->iface_num) {
                        beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                                    "BS_%d : Invalid iface_num %d."
                                    "Only iface_num 0 is supported.\n",
                                    iface_param->iface_num);

                        return -EINVAL;
                }

                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : %s.0 set param %d",
                            (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
                            "ipv4" : "ipv6", iface_param->param);

                ret = -EPERM;
                switch (iface_param->param) {
                case ISCSI_NET_PARAM_VLAN_ENABLED:
                case ISCSI_NET_PARAM_VLAN_TAG:
                        ret = beiscsi_iface_config_vlan(shost, iface_param);
                        break;
                default:
                        switch (iface_param->iface_type) {
                        case ISCSI_IFACE_TYPE_IPV4:
                                ret = beiscsi_iface_config_ipv4(shost,
                                                                iface_param,
                                                                data, dt_len);
                                break;
                        case ISCSI_IFACE_TYPE_IPV6:
                                ret = beiscsi_iface_config_ipv6(shost,
                                                                iface_param,
                                                                data, dt_len);
                                break;
                        }
                }

                if (ret == -EPERM) {
                        __beiscsi_log(phba, KERN_ERR,
                                      "BS_%d : %s.0 set param %d not permitted",
                                      (iface_param->iface_type ==
                                       ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
                                      iface_param->param);
                        ret = 0;
                }
                if (ret)
                        break;
        }

        return ret;
}

static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
                                     struct iscsi_iface *iface,
                                     int param, char *buf)
{
        struct be_cmd_get_if_info_resp *if_info;
        int len, ip_type = BEISCSI_IP_TYPE_V4;

        if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
                ip_type = BEISCSI_IP_TYPE_V6;

        len = beiscsi_if_get_info(phba, ip_type, &if_info);
        if (len)
                return len;

        switch (param) {
        case ISCSI_NET_PARAM_IPV4_ADDR:
                len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
                break;
        case ISCSI_NET_PARAM_IPV6_ADDR:
                len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
                break;
        case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
                if (!if_info->dhcp_state)
                        len = sprintf(buf, "static\n");
                else
                        len = sprintf(buf, "dhcp\n");
                break;
        case ISCSI_NET_PARAM_IPV4_SUBNET:
                len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
                break;
        case ISCSI_NET_PARAM_VLAN_ENABLED:
                len = sprintf(buf, "%s\n",
                              (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
                              "disable" : "enable");
                break;
        case ISCSI_NET_PARAM_VLAN_ID:
                if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
                        len = -EINVAL;
                else
                        len = sprintf(buf, "%d\n",
                                      (if_info->vlan_priority &
                                       ISCSI_MAX_VLAN_ID));
                break;
        case ISCSI_NET_PARAM_VLAN_PRIORITY:
                if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
                        len = -EINVAL;
                else
                        len = sprintf(buf, "%d\n",
                                      ((if_info->vlan_priority >> 13) &
                                       ISCSI_MAX_VLAN_PRIORITY));
                break;
        default:
                WARN_ON(1);
        }

        kfree(if_info);
        return len;
}

int beiscsi_iface_get_param(struct iscsi_iface *iface,
                            enum iscsi_param_type param_type,
                            int param, char *buf)
{
        struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        struct be_cmd_get_def_gateway_resp gateway;
        int len = -EPERM;

        if (param_type != ISCSI_NET_PARAM)
                return 0;
        if (!beiscsi_hba_is_online(phba)) {
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : HBA in error 0x%lx\n", phba->state);
                return -EBUSY;
        }

        switch (param) {
        case ISCSI_NET_PARAM_IPV4_ADDR:
        case ISCSI_NET_PARAM_IPV4_SUBNET:
        case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
        case ISCSI_NET_PARAM_IPV6_ADDR:
        case ISCSI_NET_PARAM_VLAN_ENABLED:
        case ISCSI_NET_PARAM_VLAN_ID:
        case ISCSI_NET_PARAM_VLAN_PRIORITY:
                len = __beiscsi_iface_get_param(phba, iface, param, buf);
                break;
        case ISCSI_NET_PARAM_IFACE_ENABLE:
                if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
                        len = sprintf(buf, "%s\n",
                                      phba->ipv4_iface ? "enable" : "disable");
                else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
                        len = sprintf(buf, "%s\n",
                                      phba->ipv6_iface ? "enable" : "disable");
                break;
        case ISCSI_NET_PARAM_IPV4_GW:
                memset(&gateway, 0, sizeof(gateway));
                len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
                if (!len)
                        len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
                break;
        }

        return len;
}

/**
 * beiscsi_ep_get_param - get the iscsi parameter
 * @ep: pointer to iscsi ep
 * @param: parameter type identifier
 * @buf: buffer pointer
 *
 * returns iscsi parameter
 */
int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
                           enum iscsi_param param, char *buf)
{
        struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
        int len;

        beiscsi_log(beiscsi_ep->phba, KERN_INFO,
                    BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_ep_get_param,"
                    " param= %d\n", param);

        switch (param) {
        case ISCSI_PARAM_CONN_PORT:
                len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
                break;
        case ISCSI_PARAM_CONN_ADDRESS:
                if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
                        len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
                else
                        len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
                break;
        default:
                len = -EPERM;
        }
        return len;
}

int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
                      enum iscsi_param param, char *buf, int buflen)
{
        struct iscsi_conn *conn = cls_conn->dd_data;
        struct iscsi_session *session = conn->session;
        struct beiscsi_hba *phba = NULL;
        int ret;

        phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_conn_set_param,"
                    " param= %d\n", param);

        ret = iscsi_set_param(cls_conn, param, buf, buflen);
        if (ret)
                return ret;
        /*
         * If userspace tried to set the value to higher than we can
         * support override here.
         */
        switch (param) {
        case ISCSI_PARAM_FIRST_BURST:
                if (session->first_burst > 8192)
                        session->first_burst = 8192;
                break;
        case ISCSI_PARAM_MAX_RECV_DLENGTH:
                if (conn->max_recv_dlength > 65536)
                        conn->max_recv_dlength = 65536;
                break;
        case ISCSI_PARAM_MAX_BURST:
                if (session->max_burst > 262144)
                        session->max_burst = 262144;
                break;
        case ISCSI_PARAM_MAX_XMIT_DLENGTH:
                if (conn->max_xmit_dlength > 65536)
                        conn->max_xmit_dlength = 65536;
                fallthrough;
        default:
                return 0;
        }

        return 0;
}

/**
 * beiscsi_get_port_state - Get the Port State
 * @shost : pointer to scsi_host structure
 *
 */
static void beiscsi_get_port_state(struct Scsi_Host *shost)
{
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        struct iscsi_cls_host *ihost = shost->shost_data;

        ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
                ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
}

/**
 * beiscsi_get_port_speed  - Get the Port Speed from Adapter
 * @shost : pointer to scsi_host structure
 *
 */
static void beiscsi_get_port_speed(struct Scsi_Host *shost)
{
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        struct iscsi_cls_host *ihost = shost->shost_data;

        switch (phba->port_speed) {
        case BE2ISCSI_LINK_SPEED_10MBPS:
                ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
                break;
        case BE2ISCSI_LINK_SPEED_100MBPS:
                ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
                break;
        case BE2ISCSI_LINK_SPEED_1GBPS:
                ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
                break;
        case BE2ISCSI_LINK_SPEED_10GBPS:
                ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
                break;
        case BE2ISCSI_LINK_SPEED_25GBPS:
                ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
                break;
        case BE2ISCSI_LINK_SPEED_40GBPS:
                ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
                break;
        default:
                ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
        }
}

/**
 * beiscsi_get_host_param - get the iscsi parameter
 * @shost: pointer to scsi_host structure
 * @param: parameter type identifier
 * @buf: buffer pointer
 *
 */
int beiscsi_get_host_param(struct Scsi_Host *shost,
                           enum iscsi_host_param param, char *buf)
{
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        int status = 0;

        if (!beiscsi_hba_is_online(phba)) {
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : HBA in error 0x%lx\n", phba->state);
                return 0;
        }
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_get_host_param, param = %d\n", param);

        switch (param) {
        case ISCSI_HOST_PARAM_HWADDRESS:
                status = beiscsi_get_macaddr(buf, phba);
                if (status < 0) {
                        beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                                    "BS_%d : beiscsi_get_macaddr Failed\n");
                        return 0;
                }
                break;
        case ISCSI_HOST_PARAM_INITIATOR_NAME:
                /* try fetching user configured name first */
                status = beiscsi_get_initiator_name(phba, buf, true);
                if (status < 0) {
                        status = beiscsi_get_initiator_name(phba, buf, false);
                        if (status < 0) {
                                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                                            "BS_%d : Retrieving Initiator Name Failed\n");
                                status = 0;
                        }
                }
                break;
        case ISCSI_HOST_PARAM_PORT_STATE:
                beiscsi_get_port_state(shost);
                status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
                break;
        case ISCSI_HOST_PARAM_PORT_SPEED:
                beiscsi_get_port_speed(shost);
                status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
                break;
        default:
                return iscsi_host_get_param(shost, param, buf);
        }
        return status;
}

int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
{
        struct be_cmd_get_nic_conf_resp resp;
        int rc;

        if (phba->mac_addr_set)
                return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);

        memset(&resp, 0, sizeof(resp));
        rc = mgmt_get_nic_conf(phba, &resp);
        if (rc)
                return rc;

        phba->mac_addr_set = true;
        memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
        return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
}

/**
 * beiscsi_conn_get_stats - get the iscsi stats
 * @cls_conn: pointer to iscsi cls conn
 * @stats: pointer to iscsi_stats structure
 *
 * returns iscsi stats
 */
void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
                            struct iscsi_stats *stats)
{
        struct iscsi_conn *conn = cls_conn->dd_data;
        struct beiscsi_hba *phba = NULL;

        phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_conn_get_stats\n");

        stats->txdata_octets = conn->txdata_octets;
        stats->rxdata_octets = conn->rxdata_octets;
        stats->dataout_pdus = conn->dataout_pdus_cnt;
        stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
        stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
        stats->datain_pdus = conn->datain_pdus_cnt;
        stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
        stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
        stats->r2t_pdus = conn->r2t_pdus_cnt;
        stats->digest_err = 0;
        stats->timeout_err = 0;
        stats->custom_length = 1;
        strcpy(stats->custom[0].desc, "eh_abort_cnt");
        stats->custom[0].value = conn->eh_abort_cnt;
}

/**
 * beiscsi_set_params_for_offld - get the parameters for offload
 * @beiscsi_conn: pointer to beiscsi_conn
 * @params: pointer to offload_params structure
 */
static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
                                          struct beiscsi_offload_params *params)
{
        struct iscsi_conn *conn = beiscsi_conn->conn;
        struct iscsi_session *session = conn->session;

        AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
                      params, session->max_burst);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params,
                      max_send_data_segment_length, params,
                      conn->max_xmit_dlength);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
                      params, session->first_burst);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
                      session->erl);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
                      conn->datadgst_en);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
                      conn->hdrdgst_en);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
                      session->initial_r2t_en);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
                      session->imm_data_en);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params,
                      data_seq_inorder, params,
                      session->dataseq_inorder_en);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params,
                      pdu_seq_inorder, params,
                      session->pdu_inorder_en);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
                      session->max_r2t);
        AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
                      (conn->exp_statsn - 1));
        AMAP_SET_BITS(struct amap_beiscsi_offload_params,
                      max_recv_data_segment_length, params,
                      conn->max_recv_dlength);

}

/**
 * beiscsi_conn_start - offload of session to chip
 * @cls_conn: pointer to beiscsi_conn
 */
int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
{
        struct iscsi_conn *conn = cls_conn->dd_data;
        struct beiscsi_conn *beiscsi_conn = conn->dd_data;
        struct beiscsi_endpoint *beiscsi_ep;
        struct beiscsi_offload_params params;
        struct beiscsi_hba *phba;

        phba = ((struct beiscsi_conn *)conn->dd_data)->phba;

        if (!beiscsi_hba_is_online(phba)) {
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : HBA in error 0x%lx\n", phba->state);
                return -EBUSY;
        }
        beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_conn_start\n");

        memset(&params, 0, sizeof(struct beiscsi_offload_params));
        beiscsi_ep = beiscsi_conn->ep;
        if (!beiscsi_ep)
                beiscsi_log(beiscsi_conn->phba, KERN_ERR,
                            BEISCSI_LOG_CONFIG,
                            "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");

        beiscsi_conn->login_in_progress = 0;
        beiscsi_set_params_for_offld(beiscsi_conn, &params);
        beiscsi_offload_connection(beiscsi_conn, &params);
        iscsi_conn_start(cls_conn);
        return 0;
}

/**
 * beiscsi_get_cid - Allocate a cid
 * @phba: The phba instance
 */
static int beiscsi_get_cid(struct beiscsi_hba *phba)
{
        uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
        unsigned short cid, cid_from_ulp;
        struct ulp_cid_info *cid_info;

        /* Find the ULP which has more CID available */
        cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
                          BEISCSI_ULP0_AVLBL_CID(phba) : 0;
        cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
                          BEISCSI_ULP1_AVLBL_CID(phba) : 0;
        cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
                        BEISCSI_ULP0 : BEISCSI_ULP1;
        /**
         * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
         * is ZERO for both, ULP 1 is returned.
         * Check if ULP is loaded before getting new CID.
         */
        if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
                return BE_INVALID_CID;

        cid_info = phba->cid_array_info[cid_from_ulp];
        cid = cid_info->cid_array[cid_info->cid_alloc];
        if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
                __beiscsi_log(phba, KERN_ERR,
                                "BS_%d : failed to get cid: available %u:%u\n",
                                cid_info->avlbl_cids, cid_info->cid_free);
                return BE_INVALID_CID;
        }
        /* empty the slot */
        cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
        if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
                cid_info->cid_alloc = 0;
        cid_info->avlbl_cids--;
        return cid;
}

/**
 * beiscsi_put_cid - Free the cid
 * @phba: The phba for which the cid is being freed
 * @cid: The cid to free
 */
static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
{
        uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
        struct hwi_wrb_context *pwrb_context;
        struct hwi_controller *phwi_ctrlr;
        struct ulp_cid_info *cid_info;
        uint16_t cid_post_ulp;

        phwi_ctrlr = phba->phwi_ctrlr;
        pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
        cid_post_ulp = pwrb_context->ulp_num;

        cid_info = phba->cid_array_info[cid_post_ulp];
        /* fill only in empty slot */
        if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
                __beiscsi_log(phba, KERN_ERR,
                              "BS_%d : failed to put cid %u: available %u:%u\n",
                              cid, cid_info->avlbl_cids, cid_info->cid_free);
                return;
        }
        cid_info->cid_array[cid_info->cid_free++] = cid;
        if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
                cid_info->cid_free = 0;
        cid_info->avlbl_cids++;
}

/**
 * beiscsi_free_ep - free endpoint
 * @beiscsi_ep: pointer to device endpoint struct
 */
static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
{
        struct beiscsi_hba *phba = beiscsi_ep->phba;
        struct beiscsi_conn *beiscsi_conn;

        beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
        beiscsi_ep->phba = NULL;
        /* clear this to track freeing in beiscsi_ep_disconnect */
        phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;

        /**
         * Check if any connection resource allocated by driver
         * is to be freed.This case occurs when target redirection
         * or connection retry is done.
         **/
        if (!beiscsi_ep->conn)
                return;

        beiscsi_conn = beiscsi_ep->conn;
        /**
         * Break ep->conn link here so that completions after
         * this are ignored.
         */
        beiscsi_ep->conn = NULL;
        if (beiscsi_conn->login_in_progress) {
                beiscsi_free_mgmt_task_handles(beiscsi_conn,
                                               beiscsi_conn->task);
                beiscsi_conn->login_in_progress = 0;
        }
}

/**
 * beiscsi_open_conn - Ask FW to open a TCP connection
 * @ep: pointer to device endpoint struct
 * @src_addr: The source IP address
 * @dst_addr: The Destination  IP address
 * @non_blocking: blocking or non-blocking call
 *
 * Asks the FW to open a TCP connection
 */
static int beiscsi_open_conn(struct iscsi_endpoint *ep,
                             struct sockaddr *src_addr,
                             struct sockaddr *dst_addr, int non_blocking)
{
        struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
        struct beiscsi_hba *phba = beiscsi_ep->phba;
        struct tcp_connect_and_offload_out *ptcpcnct_out;
        struct be_dma_mem nonemb_cmd;
        unsigned int tag, req_memsize;
        int ret = -ENOMEM;

        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_open_conn\n");

        beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
        if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : No free cid available\n");
                return ret;
        }

        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
                    beiscsi_ep->ep_cid);

        phba->ep_array[BE_GET_CRI_FROM_CID
                       (beiscsi_ep->ep_cid)] = ep;

        beiscsi_ep->cid_vld = 0;

        if (is_chip_be2_be3r(phba))
                req_memsize = sizeof(struct tcp_connect_and_offload_in);
        else
                req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);

        nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
                                req_memsize,
                                &nonemb_cmd.dma, GFP_KERNEL);
        if (nonemb_cmd.va == NULL) {

                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : Failed to allocate memory for"
                            " mgmt_open_connection\n");

                beiscsi_free_ep(beiscsi_ep);
                return -ENOMEM;
        }
        nonemb_cmd.size = req_memsize;
        memset(nonemb_cmd.va, 0, nonemb_cmd.size);
        tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
        if (!tag) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : mgmt_open_connection Failed for cid=%d\n",
                            beiscsi_ep->ep_cid);

                dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
                                    nonemb_cmd.va, nonemb_cmd.dma);
                beiscsi_free_ep(beiscsi_ep);
                return -EAGAIN;
        }

        ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
        if (ret) {
                beiscsi_log(phba, KERN_ERR,
                            BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
                            "BS_%d : mgmt_open_connection Failed");

                if (ret != -EBUSY)
                        dma_free_coherent(&phba->ctrl.pdev->dev,
                                        nonemb_cmd.size, nonemb_cmd.va,
                                        nonemb_cmd.dma);

                beiscsi_free_ep(beiscsi_ep);
                return ret;
        }

        ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
        beiscsi_ep = ep->dd_data;
        beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
        beiscsi_ep->cid_vld = 1;
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : mgmt_open_connection Success\n");

        dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
                            nonemb_cmd.va, nonemb_cmd.dma);
        return 0;
}

/**
 * beiscsi_ep_connect - Ask chip to create TCP Conn
 * @shost: Pointer to scsi_host structure
 * @dst_addr: The IP address of Target
 * @non_blocking: blocking or non-blocking call
 *
 * This routines first asks chip to create a connection and then allocates an EP
 */
struct iscsi_endpoint *
beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
                   int non_blocking)
{
        struct beiscsi_hba *phba;
        struct beiscsi_endpoint *beiscsi_ep;
        struct iscsi_endpoint *ep;
        int ret;

        if (!shost) {
                ret = -ENXIO;
                pr_err("beiscsi_ep_connect shost is NULL\n");
                return ERR_PTR(ret);
        }

        phba = iscsi_host_priv(shost);
        if (!beiscsi_hba_is_online(phba)) {
                ret = -EIO;
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : HBA in error 0x%lx\n", phba->state);
                return ERR_PTR(ret);
        }
        if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
                ret = -EBUSY;
                beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                            "BS_%d : The Adapter Port state is Down!!!\n");
                return ERR_PTR(ret);
        }

        ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
        if (!ep) {
                ret = -ENOMEM;
                return ERR_PTR(ret);
        }

        beiscsi_ep = ep->dd_data;
        beiscsi_ep->phba = phba;
        beiscsi_ep->openiscsi_ep = ep;
        ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
        if (ret) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BS_%d : Failed in beiscsi_open_conn\n");
                goto free_ep;
        }

        return ep;

free_ep:
        iscsi_destroy_endpoint(ep);
        return ERR_PTR(ret);
}

/**
 * beiscsi_ep_poll - Poll to see if connection is established
 * @ep: endpoint to be used
 * @timeout_ms: timeout specified in millisecs
 *
 * Poll to see if TCP connection established
 */
int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
{
        struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;

        beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In  beiscsi_ep_poll\n");

        if (beiscsi_ep->cid_vld == 1)
                return 1;
        else
                return 0;
}

/**
 * beiscsi_flush_cq()- Flush the CQ created.
 * @phba: ptr device priv structure.
 *
 * Before the connection resource are freed flush
 * all the CQ enteries
 **/
static void beiscsi_flush_cq(struct beiscsi_hba *phba)
{
        uint16_t i;
        struct be_eq_obj *pbe_eq;
        struct hwi_controller *phwi_ctrlr;
        struct hwi_context_memory *phwi_context;

        phwi_ctrlr = phba->phwi_ctrlr;
        phwi_context = phwi_ctrlr->phwi_ctxt;

        for (i = 0; i < phba->num_cpus; i++) {
                pbe_eq = &phwi_context->be_eq[i];
                irq_poll_disable(&pbe_eq->iopoll);
                beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
                irq_poll_enable(&pbe_eq->iopoll);
        }
}

/**
 * beiscsi_conn_close - Invalidate and upload connection
 * @beiscsi_ep: pointer to device endpoint struct
 *
 * Returns 0 on success,  -1 on failure.
 */
static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
{
        struct beiscsi_hba *phba = beiscsi_ep->phba;
        unsigned int tag, attempts;
        int ret;

        /**
         * Without successfully invalidating and uploading connection
         * driver can't reuse the CID so attempt more than once.
         */
        attempts = 0;
        while (attempts++ < 3) {
                tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
                if (tag) {
                        ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
                        if (!ret)
                                break;
                        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                                    "BS_%d : invalidate conn failed cid %d\n",
                                    beiscsi_ep->ep_cid);
                }
        }

        /* wait for all completions to arrive, then process them */
        msleep(250);
        /* flush CQ entries */
        beiscsi_flush_cq(phba);

        if (attempts > 3)
                return -1;

        attempts = 0;
        while (attempts++ < 3) {
                tag = beiscsi_upload_cxn(phba, beiscsi_ep);
                if (tag) {
                        ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
                        if (!ret)
                                break;
                        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                                    "BS_%d : upload conn failed cid %d\n",
                                    beiscsi_ep->ep_cid);
                }
        }
        if (attempts > 3)
                return -1;

        return 0;
}

/**
 * beiscsi_ep_disconnect - Tears down the TCP connection
 * @ep: endpoint to be used
 *
 * Tears down the TCP connection
 */
void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
{
        struct beiscsi_endpoint *beiscsi_ep;
        struct beiscsi_hba *phba;
        uint16_t cri_index;

        beiscsi_ep = ep->dd_data;
        phba = beiscsi_ep->phba;
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
                    beiscsi_ep->ep_cid);

        cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
        if (!phba->ep_array[cri_index]) {
                __beiscsi_log(phba, KERN_ERR,
                              "BS_%d : ep_array at %u cid %u empty\n",
                              cri_index,
                              beiscsi_ep->ep_cid);
                return;
        }

        if (!beiscsi_hba_is_online(phba)) {
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BS_%d : HBA in error 0x%lx\n", phba->state);
        } else {
                /**
                 * Make CID available even if close fails.
                 * If not freed, FW might fail open using the CID.
                 */
                if (beiscsi_conn_close(beiscsi_ep) < 0)
                        __beiscsi_log(phba, KERN_ERR,
                                      "BS_%d : close conn failed cid %d\n",
                                      beiscsi_ep->ep_cid);
        }

        beiscsi_free_ep(beiscsi_ep);
        if (!phba->conn_table[cri_index])
                __beiscsi_log(phba, KERN_ERR,
                              "BS_%d : conn_table empty at %u: cid %u\n",
                              cri_index, beiscsi_ep->ep_cid);
        phba->conn_table[cri_index] = NULL;
        iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
}

umode_t beiscsi_attr_is_visible(int param_type, int param)
{
        switch (param_type) {
        case ISCSI_NET_PARAM:
                switch (param) {
                case ISCSI_NET_PARAM_IFACE_ENABLE:
                case ISCSI_NET_PARAM_IPV4_ADDR:
                case ISCSI_NET_PARAM_IPV4_SUBNET:
                case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
                case ISCSI_NET_PARAM_IPV4_GW:
                case ISCSI_NET_PARAM_IPV6_ADDR:
                case ISCSI_NET_PARAM_VLAN_ID:
                case ISCSI_NET_PARAM_VLAN_PRIORITY:
                case ISCSI_NET_PARAM_VLAN_ENABLED:
                        return S_IRUGO;
                default:
                        return 0;
                }
        case ISCSI_HOST_PARAM:
                switch (param) {
                case ISCSI_HOST_PARAM_HWADDRESS:
                case ISCSI_HOST_PARAM_INITIATOR_NAME:
                case ISCSI_HOST_PARAM_PORT_STATE:
                case ISCSI_HOST_PARAM_PORT_SPEED:
                        return S_IRUGO;
                default:
                        return 0;
                }
        case ISCSI_PARAM:
                switch (param) {
                case ISCSI_PARAM_MAX_RECV_DLENGTH:
                case ISCSI_PARAM_MAX_XMIT_DLENGTH:
                case ISCSI_PARAM_HDRDGST_EN:
                case ISCSI_PARAM_DATADGST_EN:
                case ISCSI_PARAM_CONN_ADDRESS:
                case ISCSI_PARAM_CONN_PORT:
                case ISCSI_PARAM_EXP_STATSN:
                case ISCSI_PARAM_PERSISTENT_ADDRESS:
                case ISCSI_PARAM_PERSISTENT_PORT:
                case ISCSI_PARAM_PING_TMO:
                case ISCSI_PARAM_RECV_TMO:
                case ISCSI_PARAM_INITIAL_R2T_EN:
                case ISCSI_PARAM_MAX_R2T:
                case ISCSI_PARAM_IMM_DATA_EN:
                case ISCSI_PARAM_FIRST_BURST:
                case ISCSI_PARAM_MAX_BURST:
                case ISCSI_PARAM_PDU_INORDER_EN:
                case ISCSI_PARAM_DATASEQ_INORDER_EN:
                case ISCSI_PARAM_ERL:
                case ISCSI_PARAM_TARGET_NAME:
                case ISCSI_PARAM_TPGT:
                case ISCSI_PARAM_USERNAME:
                case ISCSI_PARAM_PASSWORD:
                case ISCSI_PARAM_USERNAME_IN:
                case ISCSI_PARAM_PASSWORD_IN:
                case ISCSI_PARAM_FAST_ABORT:
                case ISCSI_PARAM_ABORT_TMO:
                case ISCSI_PARAM_LU_RESET_TMO:
                case ISCSI_PARAM_IFACE_NAME:
                case ISCSI_PARAM_INITIATOR_NAME:
                        return S_IRUGO;
                default:
                        return 0;
                }
        }

        return 0;
}