/*
 * 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.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful. ALL EXPRESS
 * OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
 * OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH
 * DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.
 * See the GNU General Public License for more details, a copy of which
 * can be found in the file COPYING included with this package.
 *
 * Contact Information:
 * linux-drivers@broadcom.com
 *
 */

#include <linux/bsg-lib.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_bsg_iscsi.h>
#include "be_mgmt.h"
#include "be_iscsi.h"
#include "be_main.h"

unsigned int mgmt_vendor_specific_fw_cmd(struct be_ctrl_info *ctrl,
                                         struct beiscsi_hba *phba,
                                         struct bsg_job *job,
                                         struct be_dma_mem *nonemb_cmd)
{
        struct be_mcc_wrb *wrb;
        struct be_sge *mcc_sge;
        unsigned int tag = 0;
        struct iscsi_bsg_request *bsg_req = job->request;
        struct be_bsg_vendor_cmd *req = nonemb_cmd->va;
        unsigned short region, sector_size, sector, offset;

        nonemb_cmd->size = job->request_payload.payload_len;
        memset(nonemb_cmd->va, 0, nonemb_cmd->size);
        region =  bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        sector_size =  bsg_req->rqst_data.h_vendor.vendor_cmd[2];
        sector =  bsg_req->rqst_data.h_vendor.vendor_cmd[3];
        offset =  bsg_req->rqst_data.h_vendor.vendor_cmd[4];
        req->region = region;
        req->sector = sector;
        req->offset = offset;

        if (mutex_lock_interruptible(&ctrl->mbox_lock))
                return 0;
        switch (bsg_req->rqst_data.h_vendor.vendor_cmd[0]) {
        case BEISCSI_WRITE_FLASH:
                offset = sector * sector_size + offset;
                be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
                                   OPCODE_COMMON_WRITE_FLASH, sizeof(*req));
                sg_copy_to_buffer(job->request_payload.sg_list,
                                  job->request_payload.sg_cnt,
                                  nonemb_cmd->va + offset, job->request_len);
                break;
        case BEISCSI_READ_FLASH:
                be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
                           OPCODE_COMMON_READ_FLASH, sizeof(*req));
                break;
        default:
                beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                            "BG_%d : Unsupported cmd = 0x%x\n\n",
                            bsg_req->rqst_data.h_vendor.vendor_cmd[0]);

                mutex_unlock(&ctrl->mbox_lock);
                return -EPERM;
        }

        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        mcc_sge = nonembedded_sgl(wrb);
        be_wrb_hdr_prepare(wrb, nonemb_cmd->size, false,
                           job->request_payload.sg_cnt);
        mcc_sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
        mcc_sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
        mcc_sge->len = cpu_to_le32(nonemb_cmd->size);

        be_mcc_notify(phba, tag);

        mutex_unlock(&ctrl->mbox_lock);
        return tag;
}

/**
 * mgmt_open_connection()- Establish a TCP CXN
 * @phba: driver priv structure
 * @dst_addr: Destination Address
 * @beiscsi_ep: ptr to device endpoint struct
 * @nonemb_cmd: ptr to memory allocated for command
 *
 * return
 *      Success: Tag number of the MBX Command issued
 *      Failure: Error code
 **/
int mgmt_open_connection(struct beiscsi_hba *phba,
                         struct sockaddr *dst_addr,
                         struct beiscsi_endpoint *beiscsi_ep,
                         struct be_dma_mem *nonemb_cmd)
{
        struct hwi_controller *phwi_ctrlr;
        struct hwi_context_memory *phwi_context;
        struct sockaddr_in *daddr_in = (struct sockaddr_in *)dst_addr;
        struct sockaddr_in6 *daddr_in6 = (struct sockaddr_in6 *)dst_addr;
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        struct tcp_connect_and_offload_in_v1 *req;
        unsigned short def_hdr_id;
        unsigned short def_data_id;
        struct phys_addr template_address = { 0, 0 };
        struct phys_addr *ptemplate_address;
        unsigned int tag = 0;
        unsigned int i, ulp_num;
        unsigned short cid = beiscsi_ep->ep_cid;
        struct be_sge *sge;

        if (dst_addr->sa_family != PF_INET && dst_addr->sa_family != PF_INET6) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BG_%d : unknown addr family %d\n",
                            dst_addr->sa_family);
                return 0;
        }

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

        ulp_num = phwi_ctrlr->wrb_context[BE_GET_CRI_FROM_CID(cid)].ulp_num;

        def_hdr_id = (unsigned short)HWI_GET_DEF_HDRQ_ID(phba, ulp_num);
        def_data_id = (unsigned short)HWI_GET_DEF_BUFQ_ID(phba, ulp_num);

        ptemplate_address = &template_address;
        ISCSI_GET_PDU_TEMPLATE_ADDRESS(phba, ptemplate_address);
        if (mutex_lock_interruptible(&ctrl->mbox_lock))
                return 0;
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        sge = nonembedded_sgl(wrb);
        req = nonemb_cmd->va;
        memset(req, 0, sizeof(*req));

        be_wrb_hdr_prepare(wrb, nonemb_cmd->size, false, 1);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
                           OPCODE_COMMON_ISCSI_TCP_CONNECT_AND_OFFLOAD,
                           nonemb_cmd->size);
        if (dst_addr->sa_family == PF_INET) {
                __be32 s_addr = daddr_in->sin_addr.s_addr;
                req->ip_address.ip_type = BEISCSI_IP_TYPE_V4;
                req->ip_address.addr[0] = s_addr & 0x000000ff;
                req->ip_address.addr[1] = (s_addr & 0x0000ff00) >> 8;
                req->ip_address.addr[2] = (s_addr & 0x00ff0000) >> 16;
                req->ip_address.addr[3] = (s_addr & 0xff000000) >> 24;
                req->tcp_port = ntohs(daddr_in->sin_port);
                beiscsi_ep->dst_addr = daddr_in->sin_addr.s_addr;
                beiscsi_ep->dst_tcpport = ntohs(daddr_in->sin_port);
                beiscsi_ep->ip_type = BEISCSI_IP_TYPE_V4;
        } else {
                /* else its PF_INET6 family */
                req->ip_address.ip_type = BEISCSI_IP_TYPE_V6;
                memcpy(&req->ip_address.addr,
                       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
                req->tcp_port = ntohs(daddr_in6->sin6_port);
                beiscsi_ep->dst_tcpport = ntohs(daddr_in6->sin6_port);
                memcpy(&beiscsi_ep->dst6_addr,
                       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
                beiscsi_ep->ip_type = BEISCSI_IP_TYPE_V6;
        }
        req->cid = cid;
        i = phba->nxt_cqid++;
        if (phba->nxt_cqid == phba->num_cpus)
                phba->nxt_cqid = 0;
        req->cq_id = phwi_context->be_cq[i].id;
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BG_%d : i=%d cq_id=%d\n", i, req->cq_id);
        req->defq_id = def_hdr_id;
        req->hdr_ring_id = def_hdr_id;
        req->data_ring_id = def_data_id;
        req->do_offload = 1;
        req->dataout_template_pa.lo = ptemplate_address->lo;
        req->dataout_template_pa.hi = ptemplate_address->hi;
        sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
        sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
        sge->len = cpu_to_le32(nonemb_cmd->size);

        if (!is_chip_be2_be3r(phba)) {
                req->hdr.version = MBX_CMD_VER1;
                req->tcp_window_size = 0x8000;
                req->tcp_window_scale_count = 2;
        }

        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);
        return tag;
}

/**
 * beiscsi_exec_nemb_cmd()- execute non-embedded MBX cmd
 * @phba: driver priv structure
 * @nonemb_cmd: DMA address of the MBX command to be issued
 * @cbfn: callback func on MCC completion
 * @resp_buf: buffer to copy the MBX cmd response
 * @resp_buf_len: response length to be copied
 *
 **/
static int beiscsi_exec_nemb_cmd(struct beiscsi_hba *phba,
                                 struct be_dma_mem *nonemb_cmd,
                                 void (*cbfn)(struct beiscsi_hba *,
                                              unsigned int),
                                 void *resp_buf, u32 resp_buf_len)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        struct be_sge *sge;
        unsigned int tag;
        int rc = 0;

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return -ENOMEM;
        }

        sge = nonembedded_sgl(wrb);
        be_wrb_hdr_prepare(wrb, nonemb_cmd->size, false, 1);
        sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
        sge->pa_lo = cpu_to_le32(lower_32_bits(nonemb_cmd->dma));
        sge->len = cpu_to_le32(nonemb_cmd->size);

        if (cbfn) {
                struct be_dma_mem *tag_mem;

                set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
                ctrl->ptag_state[tag].cbfn = cbfn;
                tag_mem = &phba->ctrl.ptag_state[tag].tag_mem_state;

                /* store DMA mem to be freed in callback */
                tag_mem->size = nonemb_cmd->size;
                tag_mem->va = nonemb_cmd->va;
                tag_mem->dma = nonemb_cmd->dma;
        }
        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);

        /* with cbfn set, its async cmd, don't wait */
        if (cbfn)
                return 0;

        rc = beiscsi_mccq_compl_wait(phba, tag, NULL, nonemb_cmd);

        /* copy the response, if any */
        if (resp_buf)
                memcpy(resp_buf, nonemb_cmd->va, resp_buf_len);
        return rc;
}

static int beiscsi_prep_nemb_cmd(struct beiscsi_hba *phba,
                                 struct be_dma_mem *cmd,
                                 u8 subsystem, u8 opcode, u32 size)
{
        cmd->va = dma_alloc_coherent(&phba->ctrl.pdev->dev, size, &cmd->dma,
                                     GFP_KERNEL);
        if (!cmd->va) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
                            "BG_%d : Failed to allocate memory for if info\n");
                return -ENOMEM;
        }
        cmd->size = size;
        be_cmd_hdr_prepare(cmd->va, subsystem, opcode, size);
        beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                    "BG_%d : subsystem %u cmd %u size %u\n",
                    subsystem, opcode, size);
        return 0;
}

static void beiscsi_free_nemb_cmd(struct beiscsi_hba *phba,
                                  struct be_dma_mem *cmd, int rc)
{
        /*
         * If FW is busy the DMA buffer is saved with the tag. When the cmd
         * completes this buffer is freed.
         */
        if (rc == -EBUSY)
                return;

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

static void __beiscsi_eq_delay_compl(struct beiscsi_hba *phba, unsigned int tag)
{
        struct be_dma_mem *tag_mem;

        /* status is ignored */
        __beiscsi_mcc_compl_status(phba, tag, NULL, NULL);
        tag_mem = &phba->ctrl.ptag_state[tag].tag_mem_state;
        if (tag_mem->size) {
                dma_free_coherent(&phba->pcidev->dev, tag_mem->size,
                                    tag_mem->va, tag_mem->dma);
                tag_mem->size = 0;
        }
}

int beiscsi_modify_eq_delay(struct beiscsi_hba *phba,
                            struct be_set_eqd *set_eqd, int num)
{
        struct be_cmd_req_modify_eq_delay *req;
        struct be_dma_mem nonemb_cmd;
        int i, rc;

        rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_COMMON,
                        OPCODE_COMMON_MODIFY_EQ_DELAY, sizeof(*req));
        if (rc)
                return rc;

        req = nonemb_cmd.va;
        req->num_eq = cpu_to_le32(num);
        for (i = 0; i < num; i++) {
                req->delay[i].eq_id = cpu_to_le32(set_eqd[i].eq_id);
                req->delay[i].phase = 0;
                req->delay[i].delay_multiplier =
                                cpu_to_le32(set_eqd[i].delay_multiplier);
        }

        rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, __beiscsi_eq_delay_compl,
                                   NULL, 0);
        if (rc) {
                /*
                 * Only free on failure. Async cmds are handled like -EBUSY
                 * where it's handled for us.
                 */
                beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
        }
        return rc;
}

/**
 * beiscsi_get_initiator_name - read initiator name from flash
 * @phba: device priv structure
 * @name: buffer pointer
 * @cfg: fetch user configured
 *
 */
int beiscsi_get_initiator_name(struct beiscsi_hba *phba, char *name, bool cfg)
{
        struct be_dma_mem nonemb_cmd;
        struct be_cmd_hba_name resp;
        struct be_cmd_hba_name *req;
        int rc;

        rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI_INI,
                        OPCODE_ISCSI_INI_CFG_GET_HBA_NAME, sizeof(resp));
        if (rc)
                return rc;

        req = nonemb_cmd.va;
        if (cfg)
                req->hdr.version = 1;
        rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL,
                                   &resp, sizeof(resp));
        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
        if (rc) {
                beiscsi_log(phba, KERN_ERR,
                            BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
                            "BS_%d : Initiator Name MBX Failed\n");
                return rc;
        }
        rc = sprintf(name, "%s\n", resp.initiator_name);
        return rc;
}

unsigned int beiscsi_if_get_handle(struct beiscsi_hba *phba)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        struct be_cmd_get_all_if_id_req *req;
        struct be_cmd_get_all_if_id_req *pbe_allid;
        unsigned int tag;
        int status = 0;

        if (mutex_lock_interruptible(&ctrl->mbox_lock))
                return -EINTR;
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return -ENOMEM;
        }

        req = embedded_payload(wrb);
        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
                           OPCODE_COMMON_ISCSI_NTWK_GET_ALL_IF_ID,
                           sizeof(*req));
        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);

        status = beiscsi_mccq_compl_wait(phba, tag, &wrb, NULL);
        if (status) {
                beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                            "BG_%d : %s failed: %d\n", __func__, status);
                return -EBUSY;
        }

        pbe_allid = embedded_payload(wrb);
        /* we now support only one interface per function */
        phba->interface_handle = pbe_allid->if_hndl_list[0];

        return status;
}

static inline bool beiscsi_if_zero_ip(u8 *ip, u32 ip_type)
{
        u32 len;

        len = (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN;
        while (len && !ip[len - 1])
                len--;
        return (len == 0);
}

static int beiscsi_if_mod_gw(struct beiscsi_hba *phba,
                             u32 action, u32 ip_type, u8 *gw)
{
        struct be_cmd_set_def_gateway_req *req;
        struct be_dma_mem nonemb_cmd;
        int rt_val;

        rt_val = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
                        OPCODE_COMMON_ISCSI_NTWK_MODIFY_DEFAULT_GATEWAY,
                        sizeof(*req));
        if (rt_val)
                return rt_val;

        req = nonemb_cmd.va;
        req->action = action;
        req->ip_addr.ip_type = ip_type;
        memcpy(req->ip_addr.addr, gw,
               (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN);
        rt_val = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rt_val);
        return rt_val;
}

int beiscsi_if_set_gw(struct beiscsi_hba *phba, u32 ip_type, u8 *gw)
{
        struct be_cmd_get_def_gateway_resp gw_resp;
        int rt_val;

        memset(&gw_resp, 0, sizeof(gw_resp));
        rt_val = beiscsi_if_get_gw(phba, ip_type, &gw_resp);
        if (rt_val) {
                beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                            "BG_%d : Failed to Get Gateway Addr\n");
                return rt_val;
        }

        if (!beiscsi_if_zero_ip(gw_resp.ip_addr.addr, ip_type)) {
                rt_val = beiscsi_if_mod_gw(phba, IP_ACTION_DEL, ip_type,
                                           gw_resp.ip_addr.addr);
                if (rt_val) {
                        beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                                    "BG_%d : Failed to clear Gateway Addr Set\n");
                        return rt_val;
                }
        }

        rt_val = beiscsi_if_mod_gw(phba, IP_ACTION_ADD, ip_type, gw);
        if (rt_val)
                beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                            "BG_%d : Failed to Set Gateway Addr\n");

        return rt_val;
}

int beiscsi_if_get_gw(struct beiscsi_hba *phba, u32 ip_type,
                      struct be_cmd_get_def_gateway_resp *resp)
{
        struct be_cmd_get_def_gateway_req *req;
        struct be_dma_mem nonemb_cmd;
        int rc;

        rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
                        OPCODE_COMMON_ISCSI_NTWK_GET_DEFAULT_GATEWAY,
                        sizeof(*resp));
        if (rc)
                return rc;

        req = nonemb_cmd.va;
        req->ip_type = ip_type;

        rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, resp,
                                   sizeof(*resp));
        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
        return rc;
}

static int
beiscsi_if_clr_ip(struct beiscsi_hba *phba,
                  struct be_cmd_get_if_info_resp *if_info)
{
        struct be_cmd_set_ip_addr_req *req;
        struct be_dma_mem nonemb_cmd;
        int rc;

        rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
                        OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR,
                        sizeof(*req));
        if (rc)
                return rc;

        req = nonemb_cmd.va;
        req->ip_params.record_entry_count = 1;
        req->ip_params.ip_record.action = IP_ACTION_DEL;
        req->ip_params.ip_record.interface_hndl =
                phba->interface_handle;
        req->ip_params.ip_record.ip_addr.size_of_structure =
                sizeof(struct be_ip_addr_subnet_format);
        req->ip_params.ip_record.ip_addr.ip_type = if_info->ip_addr.ip_type;
        memcpy(req->ip_params.ip_record.ip_addr.addr,
               if_info->ip_addr.addr,
               sizeof(if_info->ip_addr.addr));
        memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
               if_info->ip_addr.subnet_mask,
               sizeof(if_info->ip_addr.subnet_mask));
        rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
        if (rc < 0 || req->ip_params.ip_record.status) {
                beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
                            "BG_%d : failed to clear IP: rc %d status %d\n",
                            rc, req->ip_params.ip_record.status);
        }
        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
        return rc;
}

static int
beiscsi_if_set_ip(struct beiscsi_hba *phba, u8 *ip,
                  u8 *subnet, u32 ip_type)
{
        struct be_cmd_set_ip_addr_req *req;
        struct be_dma_mem nonemb_cmd;
        uint32_t ip_len;
        int rc;

        rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
                        OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR,
                        sizeof(*req));
        if (rc)
                return rc;

        req = nonemb_cmd.va;
        req->ip_params.record_entry_count = 1;
        req->ip_params.ip_record.action = IP_ACTION_ADD;
        req->ip_params.ip_record.interface_hndl =
                phba->interface_handle;
        req->ip_params.ip_record.ip_addr.size_of_structure =
                sizeof(struct be_ip_addr_subnet_format);
        req->ip_params.ip_record.ip_addr.ip_type = ip_type;
        ip_len = (ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN;
        memcpy(req->ip_params.ip_record.ip_addr.addr, ip, ip_len);
        if (subnet)
                memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
                       subnet, ip_len);

        rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
        /**
         * In some cases, host needs to look into individual record status
         * even though FW reported success for that IOCTL.
         */
        if (rc < 0 || req->ip_params.ip_record.status) {
                __beiscsi_log(phba, KERN_ERR,
                            "BG_%d : failed to set IP: rc %d status %d\n",
                            rc, req->ip_params.ip_record.status);
                if (req->ip_params.ip_record.status)
                        rc = -EINVAL;
        }
        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
        return rc;
}

int beiscsi_if_en_static(struct beiscsi_hba *phba, u32 ip_type,
                         u8 *ip, u8 *subnet)
{
        struct be_cmd_get_if_info_resp *if_info;
        struct be_cmd_rel_dhcp_req *reldhcp;
        struct be_dma_mem nonemb_cmd;
        int rc;

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

        if (if_info->dhcp_state) {
                rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd,
                                CMD_SUBSYSTEM_ISCSI,
                                OPCODE_COMMON_ISCSI_NTWK_REL_STATELESS_IP_ADDR,
                                sizeof(*reldhcp));
                if (rc)
                        goto exit;

                reldhcp = nonemb_cmd.va;
                reldhcp->interface_hndl = phba->interface_handle;
                reldhcp->ip_type = ip_type;
                rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
                beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
                if (rc < 0) {
                        beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                                    "BG_%d : failed to release existing DHCP: %d\n",
                                    rc);
                        goto exit;
                }
        }

        /* first delete any IP set */
        if (!beiscsi_if_zero_ip(if_info->ip_addr.addr, ip_type)) {
                rc = beiscsi_if_clr_ip(phba, if_info);
                if (rc)
                        goto exit;
        }

        /* if ip == NULL then this is called just to release DHCP IP */
        if (ip)
                rc = beiscsi_if_set_ip(phba, ip, subnet, ip_type);
exit:
        kfree(if_info);
        return rc;
}

int beiscsi_if_en_dhcp(struct beiscsi_hba *phba, u32 ip_type)
{
        struct be_cmd_get_def_gateway_resp gw_resp;
        struct be_cmd_get_if_info_resp *if_info;
        struct be_cmd_set_dhcp_req *dhcpreq;
        struct be_dma_mem nonemb_cmd;
        u8 *gw;
        int rc;

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

        if (if_info->dhcp_state) {
                beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                                "BG_%d : DHCP Already Enabled\n");
                goto exit;
        }

        /* first delete any IP set */
        if (!beiscsi_if_zero_ip(if_info->ip_addr.addr, ip_type)) {
                rc = beiscsi_if_clr_ip(phba, if_info);
                if (rc)
                        goto exit;
        }

        /* delete gateway settings if mode change is to DHCP */
        memset(&gw_resp, 0, sizeof(gw_resp));
        /* use ip_type provided in if_info */
        rc = beiscsi_if_get_gw(phba, if_info->ip_addr.ip_type, &gw_resp);
        if (rc) {
                beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                            "BG_%d : Failed to Get Gateway Addr\n");
                goto exit;
        }
        gw = (u8 *)&gw_resp.ip_addr.addr;
        if (!beiscsi_if_zero_ip(gw, if_info->ip_addr.ip_type)) {
                rc = beiscsi_if_mod_gw(phba, IP_ACTION_DEL,
                                       if_info->ip_addr.ip_type, gw);
                if (rc) {
                        beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
                                    "BG_%d : Failed to clear Gateway Addr Set\n");
                        goto exit;
                }
        }

        rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
                        OPCODE_COMMON_ISCSI_NTWK_CONFIG_STATELESS_IP_ADDR,
                        sizeof(*dhcpreq));
        if (rc)
                goto exit;

        dhcpreq = nonemb_cmd.va;
        dhcpreq->flags = 1; /* 1 - blocking; 0 - non-blocking */
        dhcpreq->retry_count = 1;
        dhcpreq->interface_hndl = phba->interface_handle;
        dhcpreq->ip_type = ip_type;
        rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
exit:
        kfree(if_info);
        return rc;
}

/**
 * beiscsi_if_set_vlan()- Issue and wait for CMD completion
 * @phba: device private structure instance
 * @vlan_tag: VLAN tag
 *
 * Issue the MBX Cmd and wait for the completion of the
 * command.
 *
 * returns
 *      Success: 0
 *      Failure: Non-Xero Value
 **/
int beiscsi_if_set_vlan(struct beiscsi_hba *phba, uint16_t vlan_tag)
{
        int rc;
        unsigned int tag;

        tag = be_cmd_set_vlan(phba, vlan_tag);
        if (!tag) {
                beiscsi_log(phba, KERN_ERR,
                            (BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX),
                            "BG_%d : VLAN Setting Failed\n");
                return -EBUSY;
        }

        rc = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
        if (rc) {
                beiscsi_log(phba, KERN_ERR,
                            (BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX),
                            "BS_%d : VLAN MBX Cmd Failed\n");
                return rc;
        }
        return rc;
}


int beiscsi_if_get_info(struct beiscsi_hba *phba, int ip_type,
                        struct be_cmd_get_if_info_resp **if_info)
{
        struct be_cmd_get_if_info_req *req;
        struct be_dma_mem nonemb_cmd;
        uint32_t ioctl_size = sizeof(struct be_cmd_get_if_info_resp);
        int rc;

        rc = beiscsi_if_get_handle(phba);
        if (rc)
                return rc;

        do {
                rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd,
                                CMD_SUBSYSTEM_ISCSI,
                                OPCODE_COMMON_ISCSI_NTWK_GET_IF_INFO,
                                ioctl_size);
                if (rc)
                        return rc;

                req = nonemb_cmd.va;
                req->interface_hndl = phba->interface_handle;
                req->ip_type = ip_type;

                /* Allocate memory for if_info */
                *if_info = kzalloc(ioctl_size, GFP_KERNEL);
                if (!*if_info) {
                        beiscsi_log(phba, KERN_ERR,
                                    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
                                    "BG_%d : Memory Allocation Failure\n");

                                beiscsi_free_nemb_cmd(phba, &nonemb_cmd,
                                                      -ENOMEM);
                                return -ENOMEM;
                }

                rc =  beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, *if_info,
                                            ioctl_size);

                /* Check if the error is because of Insufficent_Buffer */
                if (rc == -EAGAIN) {

                        /* Get the new memory size */
                        ioctl_size = ((struct be_cmd_resp_hdr *)
                                      nonemb_cmd.va)->actual_resp_len;
                        ioctl_size += sizeof(struct be_cmd_req_hdr);

                        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
                        /* Free the virtual memory */
                        kfree(*if_info);
                } else {
                        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
                        break;
                }
        } while (true);
        return rc;
}

int mgmt_get_nic_conf(struct beiscsi_hba *phba,
                      struct be_cmd_get_nic_conf_resp *nic)
{
        struct be_dma_mem nonemb_cmd;
        int rc;

        rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
                        OPCODE_COMMON_ISCSI_NTWK_GET_NIC_CONFIG,
                        sizeof(*nic));
        if (rc)
                return rc;

        rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, nic, sizeof(*nic));
        beiscsi_free_nemb_cmd(phba, &nonemb_cmd, rc);
        return rc;
}

static void beiscsi_boot_process_compl(struct beiscsi_hba *phba,
                                       unsigned int tag)
{
        struct be_cmd_get_boot_target_resp *boot_resp;
        struct be_cmd_resp_logout_fw_sess *logo_resp;
        struct be_cmd_get_session_resp *sess_resp;
        struct be_mcc_wrb *wrb;
        struct boot_struct *bs;
        int boot_work, status;

        if (!test_bit(BEISCSI_HBA_BOOT_WORK, &phba->state)) {
                __beiscsi_log(phba, KERN_ERR,
                              "BG_%d : %s no boot work %lx\n",
                              __func__, phba->state);
                return;
        }

        if (phba->boot_struct.tag != tag) {
                __beiscsi_log(phba, KERN_ERR,
                              "BG_%d : %s tag mismatch %d:%d\n",
                              __func__, tag, phba->boot_struct.tag);
                return;
        }
        bs = &phba->boot_struct;
        boot_work = 1;
        status = 0;
        switch (bs->action) {
        case BEISCSI_BOOT_REOPEN_SESS:
                status = __beiscsi_mcc_compl_status(phba, tag, NULL, NULL);
                if (!status)
                        bs->action = BEISCSI_BOOT_GET_SHANDLE;
                else
                        bs->retry--;
                break;
        case BEISCSI_BOOT_GET_SHANDLE:
                status = __beiscsi_mcc_compl_status(phba, tag, &wrb, NULL);
                if (!status) {
                        boot_resp = embedded_payload(wrb);
                        bs->s_handle = boot_resp->boot_session_handle;
                }
                if (bs->s_handle == BE_BOOT_INVALID_SHANDLE) {
                        bs->action = BEISCSI_BOOT_REOPEN_SESS;
                        bs->retry--;
                } else {
                        bs->action = BEISCSI_BOOT_GET_SINFO;
                }
                break;
        case BEISCSI_BOOT_GET_SINFO:
                status = __beiscsi_mcc_compl_status(phba, tag, NULL,
                                                    &bs->nonemb_cmd);
                if (!status) {
                        sess_resp = bs->nonemb_cmd.va;
                        memcpy(&bs->boot_sess, &sess_resp->session_info,
                               sizeof(struct mgmt_session_info));
                        bs->action = BEISCSI_BOOT_LOGOUT_SESS;
                } else {
                        __beiscsi_log(phba, KERN_ERR,
                                      "BG_%d : get boot session info error : 0x%x\n",
                                      status);
                        boot_work = 0;
                }
                dma_free_coherent(&phba->ctrl.pdev->dev, bs->nonemb_cmd.size,
                                    bs->nonemb_cmd.va, bs->nonemb_cmd.dma);
                bs->nonemb_cmd.va = NULL;
                break;
        case BEISCSI_BOOT_LOGOUT_SESS:
                status = __beiscsi_mcc_compl_status(phba, tag, &wrb, NULL);
                if (!status) {
                        logo_resp = embedded_payload(wrb);
                        if (logo_resp->session_status != BE_SESS_STATUS_CLOSE) {
                                __beiscsi_log(phba, KERN_ERR,
                                              "BG_%d : FW boot session logout error : 0x%x\n",
                                              logo_resp->session_status);
                        }
                }
                /* continue to create boot_kset even if logout failed? */
                bs->action = BEISCSI_BOOT_CREATE_KSET;
                break;
        default:
                break;
        }

        /* clear the tag so no other completion matches this tag */
        bs->tag = 0;
        if (!bs->retry) {
                boot_work = 0;
                __beiscsi_log(phba, KERN_ERR,
                              "BG_%d : failed to setup boot target: status %d action %d\n",
                              status, bs->action);
        }
        if (!boot_work) {
                /* wait for next event to start boot_work */
                clear_bit(BEISCSI_HBA_BOOT_WORK, &phba->state);
                return;
        }
        schedule_work(&phba->boot_work);
}

/**
 * beiscsi_boot_logout_sess()- Logout from boot FW session
 * @phba: Device priv structure instance
 *
 * return
 *      the TAG used for MBOX Command
 *
 */
unsigned int beiscsi_boot_logout_sess(struct beiscsi_hba *phba)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        struct be_cmd_req_logout_fw_sess *req;
        unsigned int tag;

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        req = embedded_payload(wrb);
        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
                           OPCODE_ISCSI_INI_SESSION_LOGOUT_TARGET,
                           sizeof(struct be_cmd_req_logout_fw_sess));
        /* Use the session handle copied into boot_sess */
        req->session_handle = phba->boot_struct.boot_sess.session_handle;

        phba->boot_struct.tag = tag;
        set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
        ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;

        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);

        return tag;
}
/**
 * beiscsi_boot_reopen_sess()- Reopen boot session
 * @phba: Device priv structure instance
 *
 * return
 *      the TAG used for MBOX Command
 *
 **/
unsigned int beiscsi_boot_reopen_sess(struct beiscsi_hba *phba)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        struct be_cmd_reopen_session_req *req;
        unsigned int tag;

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        req = embedded_payload(wrb);
        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
                           OPCODE_ISCSI_INI_DRIVER_REOPEN_ALL_SESSIONS,
                           sizeof(struct be_cmd_reopen_session_resp));
        req->reopen_type = BE_REOPEN_BOOT_SESSIONS;
        req->session_handle = BE_BOOT_INVALID_SHANDLE;

        phba->boot_struct.tag = tag;
        set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
        ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;

        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);
        return tag;
}


/**
 * beiscsi_boot_get_sinfo()- Get boot session info
 * @phba: device priv structure instance
 *
 * Fetches the boot_struct.s_handle info from FW.
 * return
 *      the TAG used for MBOX Command
 *
 **/
unsigned int beiscsi_boot_get_sinfo(struct beiscsi_hba *phba)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_cmd_get_session_req *req;
        struct be_dma_mem *nonemb_cmd;
        struct be_mcc_wrb *wrb;
        struct be_sge *sge;
        unsigned int tag;

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        nonemb_cmd = &phba->boot_struct.nonemb_cmd;
        nonemb_cmd->size = sizeof(struct be_cmd_get_session_resp);
        nonemb_cmd->va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
                                              nonemb_cmd->size,
                                              &nonemb_cmd->dma,
                                              GFP_KERNEL);
        if (!nonemb_cmd->va) {
                free_mcc_wrb(ctrl, tag);
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        req = nonemb_cmd->va;
        memset(req, 0, sizeof(*req));
        sge = nonembedded_sgl(wrb);
        be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
                           OPCODE_ISCSI_INI_SESSION_GET_A_SESSION,
                           sizeof(struct be_cmd_get_session_resp));
        req->session_handle = phba->boot_struct.s_handle;
        sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd->dma));
        sge->pa_lo = cpu_to_le32(nonemb_cmd->dma & 0xFFFFFFFF);
        sge->len = cpu_to_le32(nonemb_cmd->size);

        phba->boot_struct.tag = tag;
        set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
        ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;

        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);
        return tag;
}

unsigned int __beiscsi_boot_get_shandle(struct beiscsi_hba *phba, int async)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        struct be_cmd_get_boot_target_req *req;
        unsigned int tag;

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        req = embedded_payload(wrb);
        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
                           OPCODE_ISCSI_INI_BOOT_GET_BOOT_TARGET,
                           sizeof(struct be_cmd_get_boot_target_resp));

        if (async) {
                phba->boot_struct.tag = tag;
                set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
                ctrl->ptag_state[tag].cbfn = beiscsi_boot_process_compl;
        }

        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);
        return tag;
}

/**
 * beiscsi_boot_get_shandle()- Get boot session handle
 * @phba: device priv structure instance
 * @s_handle: session handle returned for boot session.
 *
 * return
 *      Success: 1
 *      Failure: negative
 *
 **/
int beiscsi_boot_get_shandle(struct beiscsi_hba *phba, unsigned int *s_handle)
{
        struct be_cmd_get_boot_target_resp *boot_resp;
        struct be_mcc_wrb *wrb;
        unsigned int tag;
        int rc;

        *s_handle = BE_BOOT_INVALID_SHANDLE;
        /* get configured boot session count and handle */
        tag = __beiscsi_boot_get_shandle(phba, 0);
        if (!tag) {
                beiscsi_log(phba, KERN_ERR,
                            BEISCSI_LOG_CONFIG | BEISCSI_LOG_INIT,
                            "BG_%d : Getting Boot Target Info Failed\n");
                return -EAGAIN;
        }

        rc = beiscsi_mccq_compl_wait(phba, tag, &wrb, NULL);
        if (rc) {
                beiscsi_log(phba, KERN_ERR,
                            BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
                            "BG_%d : MBX CMD get_boot_target Failed\n");
                return -EBUSY;
        }

        boot_resp = embedded_payload(wrb);
        /* check if there are any boot targets configured */
        if (!boot_resp->boot_session_count) {
                __beiscsi_log(phba, KERN_INFO,
                              "BG_%d : No boot targets configured\n");
                return -ENXIO;
        }

        /* only if FW has logged in to the boot target, s_handle is valid */
        *s_handle = boot_resp->boot_session_handle;
        return 1;
}

/**
 * beiscsi_drvr_ver_disp()- Display the driver Name and Version
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text driver name and version
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_drvr_ver_disp(struct device *dev, struct device_attribute *attr,
                       char *buf)
{
        return snprintf(buf, PAGE_SIZE, BE_NAME "\n");
}

/**
 * beiscsi_fw_ver_disp()- Display Firmware Version
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text Firmware version
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_fw_ver_disp(struct device *dev, struct device_attribute *attr,
                     char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct beiscsi_hba *phba = iscsi_host_priv(shost);

        return snprintf(buf, PAGE_SIZE, "%s\n", phba->fw_ver_str);
}

/**
 * beiscsi_active_session_disp()- Display Sessions Active
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text Session Count
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_active_session_disp(struct device *dev, struct device_attribute *attr,
                         char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        uint16_t avlbl_cids = 0, ulp_num, len = 0, total_cids = 0;

        for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
                if (test_bit(ulp_num, (void *)&phba->fw_config.ulp_supported)) {
                        avlbl_cids = BEISCSI_ULP_AVLBL_CID(phba, ulp_num);
                        total_cids = BEISCSI_GET_CID_COUNT(phba, ulp_num);
                        len += scnprintf(buf+len, PAGE_SIZE - len,
                                         "ULP%d : %d\n", ulp_num,
                                         (total_cids - avlbl_cids));
                } else
                        len += scnprintf(buf+len, PAGE_SIZE - len,
                                         "ULP%d : %d\n", ulp_num, 0);
        }

        return len;
}

/**
 * beiscsi_free_session_disp()- Display Avaliable Session
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text Session Count
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_free_session_disp(struct device *dev, struct device_attribute *attr,
                       char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct beiscsi_hba *phba = iscsi_host_priv(shost);
        uint16_t ulp_num, len = 0;

        for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
                if (test_bit(ulp_num, (void *)&phba->fw_config.ulp_supported))
                        len += scnprintf(buf+len, PAGE_SIZE - len,
                                         "ULP%d : %d\n", ulp_num,
                                         BEISCSI_ULP_AVLBL_CID(phba, ulp_num));
                else
                        len += scnprintf(buf+len, PAGE_SIZE - len,
                                         "ULP%d : %d\n", ulp_num, 0);
        }

        return len;
}

/**
 * beiscsi_adap_family_disp()- Display adapter family.
 * @dev: ptr to device to get priv structure
 * @attr: device attribute, not used.
 * @buf: contains formatted text driver name and version
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_adap_family_disp(struct device *dev, struct device_attribute *attr,
                          char *buf)
{
        uint16_t dev_id = 0;
        struct Scsi_Host *shost = class_to_shost(dev);
        struct beiscsi_hba *phba = iscsi_host_priv(shost);

        dev_id = phba->pcidev->device;
        switch (dev_id) {
        case BE_DEVICE_ID1:
        case OC_DEVICE_ID1:
        case OC_DEVICE_ID2:
                return snprintf(buf, PAGE_SIZE,
                                "Obsolete/Unsupported BE2 Adapter Family\n");
        case BE_DEVICE_ID2:
        case OC_DEVICE_ID3:
                return snprintf(buf, PAGE_SIZE, "BE3-R Adapter Family\n");
        case OC_SKH_ID1:
                return snprintf(buf, PAGE_SIZE, "Skyhawk-R Adapter Family\n");
        default:
                return snprintf(buf, PAGE_SIZE,
                                "Unknown Adapter Family: 0x%x\n", dev_id);
        }
}

/**
 * beiscsi_phys_port_disp()- Display Physical Port Identifier
 * @dev: ptr to device not used.
 * @attr: device attribute, not used.
 * @buf: contains formatted text port identifier
 *
 * return
 * size of the formatted string
 **/
ssize_t
beiscsi_phys_port_disp(struct device *dev, struct device_attribute *attr,
                         char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct beiscsi_hba *phba = iscsi_host_priv(shost);

        return snprintf(buf, PAGE_SIZE, "Port Identifier : %u\n",
                        phba->fw_config.phys_port);
}

void beiscsi_offload_cxn_v0(struct beiscsi_offload_params *params,
                             struct wrb_handle *pwrb_handle,
                             struct be_mem_descriptor *mem_descr,
                             struct hwi_wrb_context *pwrb_context)
{
        struct iscsi_wrb *pwrb = pwrb_handle->pwrb;

        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
                      max_send_data_segment_length, pwrb,
                      params->dw[offsetof(struct amap_beiscsi_offload_params,
                      max_send_data_segment_length) / 32]);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, type, pwrb,
                      BE_TGT_CTX_UPDT_CMD);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
                      first_burst_length,
                      pwrb,
                      params->dw[offsetof(struct amap_beiscsi_offload_params,
                      first_burst_length) / 32]);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, erl, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      erl) / 32] & OFFLD_PARAMS_ERL));
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, dde, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                       dde) / 32] & OFFLD_PARAMS_DDE) >> 2);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, hde, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      hde) / 32] & OFFLD_PARAMS_HDE) >> 3);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, ir2t, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      ir2t) / 32] & OFFLD_PARAMS_IR2T) >> 4);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, imd, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      imd) / 32] & OFFLD_PARAMS_IMD) >> 5);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, stat_sn,
                      pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      exp_statsn) / 32] + 1));
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, wrb_idx,
                      pwrb, pwrb_handle->wrb_index);

        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
                      max_burst_length, pwrb, params->dw[offsetof
                      (struct amap_beiscsi_offload_params,
                      max_burst_length) / 32]);

        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, ptr2nextwrb,
                      pwrb, pwrb_handle->wrb_index);
        if (pwrb_context->plast_wrb)
                AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
                              ptr2nextwrb,
                              pwrb_context->plast_wrb,
                              pwrb_handle->wrb_index);
        pwrb_context->plast_wrb = pwrb;

        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
                      session_state, pwrb, 0);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, compltonack,
                      pwrb, 1);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, notpredblq,
                      pwrb, 0);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb, mode, pwrb,
                      0);

        mem_descr += ISCSI_MEM_GLOBAL_HEADER;
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
                      pad_buffer_addr_hi, pwrb,
                      mem_descr->mem_array[0].bus_address.u.a32.address_hi);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb,
                      pad_buffer_addr_lo, pwrb,
                      mem_descr->mem_array[0].bus_address.u.a32.address_lo);
}

void beiscsi_offload_cxn_v2(struct beiscsi_offload_params *params,
                             struct wrb_handle *pwrb_handle,
                             struct hwi_wrb_context *pwrb_context)
{
        struct iscsi_wrb *pwrb = pwrb_handle->pwrb;

        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      max_burst_length, pwrb, params->dw[offsetof
                      (struct amap_beiscsi_offload_params,
                      max_burst_length) / 32]);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      type, pwrb,
                      BE_TGT_CTX_UPDT_CMD);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      ptr2nextwrb,
                      pwrb, pwrb_handle->wrb_index);
        if (pwrb_context->plast_wrb)
                AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                              ptr2nextwrb,
                              pwrb_context->plast_wrb,
                              pwrb_handle->wrb_index);
        pwrb_context->plast_wrb = pwrb;

        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, wrb_idx,
                      pwrb, pwrb_handle->wrb_index);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      max_send_data_segment_length, pwrb,
                      params->dw[offsetof(struct amap_beiscsi_offload_params,
                      max_send_data_segment_length) / 32]);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      first_burst_length, pwrb,
                      params->dw[offsetof(struct amap_beiscsi_offload_params,
                      first_burst_length) / 32]);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      max_recv_dataseg_len, pwrb,
                      params->dw[offsetof(struct amap_beiscsi_offload_params,
                      max_recv_data_segment_length) / 32]);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      max_cxns, pwrb, BEISCSI_MAX_CXNS);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, erl, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      erl) / 32] & OFFLD_PARAMS_ERL));
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, dde, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      dde) / 32] & OFFLD_PARAMS_DDE) >> 2);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, hde, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      hde) / 32] & OFFLD_PARAMS_HDE) >> 3);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      ir2t, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      ir2t) / 32] & OFFLD_PARAMS_IR2T) >> 4);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, imd, pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      imd) / 32] & OFFLD_PARAMS_IMD) >> 5);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      data_seq_inorder,
                      pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      data_seq_inorder) / 32] &
                      OFFLD_PARAMS_DATA_SEQ_INORDER) >> 6);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2,
                      pdu_seq_inorder,
                      pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      pdu_seq_inorder) / 32] &
                      OFFLD_PARAMS_PDU_SEQ_INORDER) >> 7);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, max_r2t,
                      pwrb,
                      (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      max_r2t) / 32] &
                      OFFLD_PARAMS_MAX_R2T) >> 8);
        AMAP_SET_BITS(struct amap_iscsi_target_context_update_wrb_v2, stat_sn,
                      pwrb,
                     (params->dw[offsetof(struct amap_beiscsi_offload_params,
                      exp_statsn) / 32] + 1));
}

unsigned int beiscsi_invalidate_cxn(struct beiscsi_hba *phba,
                                    struct beiscsi_endpoint *beiscsi_ep)
{
        struct be_invalidate_connection_params_in *req;
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        unsigned int tag = 0;

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        req = embedded_payload(wrb);
        be_wrb_hdr_prepare(wrb, sizeof(union be_invalidate_connection_params),
                           true, 0);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI_INI,
                           OPCODE_ISCSI_INI_DRIVER_INVALIDATE_CONNECTION,
                           sizeof(*req));
        req->session_handle = beiscsi_ep->fw_handle;
        req->cid = beiscsi_ep->ep_cid;
        if (beiscsi_ep->conn)
                req->cleanup_type = BE_CLEANUP_TYPE_INVALIDATE;
        else
                req->cleanup_type = BE_CLEANUP_TYPE_ISSUE_TCP_RST;
        /**
         * 0 - non-persistent targets
         * 1 - save session info on flash
         */
        req->save_cfg = 0;
        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);
        return tag;
}

unsigned int beiscsi_upload_cxn(struct beiscsi_hba *phba,
                                struct beiscsi_endpoint *beiscsi_ep)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct be_mcc_wrb *wrb;
        struct be_tcp_upload_params_in *req;
        unsigned int tag;

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                return 0;
        }

        req = embedded_payload(wrb);
        be_wrb_hdr_prepare(wrb, sizeof(union be_tcp_upload_params), true, 0);
        be_cmd_hdr_prepare(&req->hdr, CMD_COMMON_TCP_UPLOAD,
                           OPCODE_COMMON_TCP_UPLOAD, sizeof(*req));
        req->id = beiscsi_ep->ep_cid;
        if (beiscsi_ep->conn)
                req->upload_type = BE_UPLOAD_TYPE_GRACEFUL;
        else
                req->upload_type = BE_UPLOAD_TYPE_ABORT;
        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);
        return tag;
}

int beiscsi_mgmt_invalidate_icds(struct beiscsi_hba *phba,
                                 struct invldt_cmd_tbl *inv_tbl,
                                 unsigned int nents)
{
        struct be_ctrl_info *ctrl = &phba->ctrl;
        struct invldt_cmds_params_in *req;
        struct be_dma_mem nonemb_cmd;
        struct be_mcc_wrb *wrb;
        unsigned int i, tag;
        struct be_sge *sge;
        int rc;

        if (!nents || nents > BE_INVLDT_CMD_TBL_SZ)
                return -EINVAL;

        nonemb_cmd.size = sizeof(union be_invldt_cmds_params);
        nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
                                           nonemb_cmd.size, &nonemb_cmd.dma,
                                           GFP_KERNEL);
        if (!nonemb_cmd.va) {
                beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_EH,
                            "BM_%d : invldt_cmds_params alloc failed\n");
                return -ENOMEM;
        }

        mutex_lock(&ctrl->mbox_lock);
        wrb = alloc_mcc_wrb(phba, &tag);
        if (!wrb) {
                mutex_unlock(&ctrl->mbox_lock);
                dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
                                    nonemb_cmd.va, nonemb_cmd.dma);
                return -ENOMEM;
        }

        req = nonemb_cmd.va;
        be_wrb_hdr_prepare(wrb, nonemb_cmd.size, false, 1);
        be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
                        OPCODE_COMMON_ISCSI_ERROR_RECOVERY_INVALIDATE_COMMANDS,
                        sizeof(*req));
        req->ref_handle = 0;
        req->cleanup_type = CMD_ISCSI_COMMAND_INVALIDATE;
        for (i = 0; i < nents; i++) {
                req->table[i].icd = inv_tbl[i].icd;
                req->table[i].cid = inv_tbl[i].cid;
                req->icd_count++;
        }
        sge = nonembedded_sgl(wrb);
        sge->pa_hi = cpu_to_le32(upper_32_bits(nonemb_cmd.dma));
        sge->pa_lo = cpu_to_le32(lower_32_bits(nonemb_cmd.dma));
        sge->len = cpu_to_le32(nonemb_cmd.size);

        be_mcc_notify(phba, tag);
        mutex_unlock(&ctrl->mbox_lock);

        rc = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
        if (rc != -EBUSY)
                dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
                                    nonemb_cmd.va, nonemb_cmd.dma);
        return rc;
}