/**
 * Copyright (C) 2005 - 2015 Emulex
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.  The full GNU General
 * Public License is included in this distribution in the file called COPYING.
 *
 * Written by: Jayamohan Kallickal (jayamohan.kallickal@avagotech.com)
 *
 * Contact Information:
 * linux-drivers@avagotech.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#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"

/* UE Status Low CSR */
static const char * const desc_ue_status_low[] = {
	"CEV",
	"CTX",
	"DBUF",
	"ERX",
	"Host",
	"MPU",
	"NDMA",
	"PTC ",
	"RDMA ",
	"RXF ",
	"RXIPS ",
	"RXULP0 ",
	"RXULP1 ",
	"RXULP2 ",
	"TIM ",
	"TPOST ",
	"TPRE ",
	"TXIPS ",
	"TXULP0 ",
	"TXULP1 ",
	"UC ",
	"WDMA ",
	"TXULP2 ",
	"HOST1 ",
	"P0_OB_LINK ",
	"P1_OB_LINK ",
	"HOST_GPIO ",
	"MBOX ",
	"AXGMAC0",
	"AXGMAC1",
	"JTAG",
	"MPU_INTPEND"
};

/* UE Status High CSR */
static const char * const desc_ue_status_hi[] = {
	"LPCMEMHOST",
	"MGMT_MAC",
	"PCS0ONLINE",
	"MPU_IRAM",
	"PCS1ONLINE",
	"PCTL0",
	"PCTL1",
	"PMEM",
	"RR",
	"TXPB",
	"RXPP",
	"XAUI",
	"TXP",
	"ARM",
	"IPC",
	"HOST2",
	"HOST3",
	"HOST4",
	"HOST5",
	"HOST6",
	"HOST7",
	"HOST8",
	"HOST9",
	"NETC",
	"Unknown",
	"Unknown",
	"Unknown",
	"Unknown",
	"Unknown",
	"Unknown",
	"Unknown",
	"Unknown"
};

/*
 * beiscsi_ue_detec()- Detect Unrecoverable Error on adapter
 * @phba: Driver priv structure
 *
 * Read registers linked to UE and check for the UE status
 **/
void beiscsi_ue_detect(struct beiscsi_hba *phba)
{
	uint32_t ue_hi = 0, ue_lo = 0;
	uint32_t ue_mask_hi = 0, ue_mask_lo = 0;
	uint8_t i = 0;

	if (phba->ue_detected)
		return;

	pci_read_config_dword(phba->pcidev,
			      PCICFG_UE_STATUS_LOW, &ue_lo);
	pci_read_config_dword(phba->pcidev,
			      PCICFG_UE_STATUS_MASK_LOW,
			      &ue_mask_lo);
	pci_read_config_dword(phba->pcidev,
			      PCICFG_UE_STATUS_HIGH,
			      &ue_hi);
	pci_read_config_dword(phba->pcidev,
			      PCICFG_UE_STATUS_MASK_HI,
			      &ue_mask_hi);

	ue_lo = (ue_lo & ~ue_mask_lo);
	ue_hi = (ue_hi & ~ue_mask_hi);


	if (ue_lo || ue_hi) {
		phba->ue_detected = true;
		beiscsi_log(phba, KERN_ERR,
			    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
			    "BG_%d : Error detected on the adapter\n");
	}

	if (ue_lo) {
		for (i = 0; ue_lo; ue_lo >>= 1, i++) {
			if (ue_lo & 1)
				beiscsi_log(phba, KERN_ERR,
					    BEISCSI_LOG_CONFIG,
					    "BG_%d : UE_LOW %s bit set\n",
					    desc_ue_status_low[i]);
		}
	}

	if (ue_hi) {
		for (i = 0; ue_hi; ue_hi >>= 1, i++) {
			if (ue_hi & 1)
				beiscsi_log(phba, KERN_ERR,
					    BEISCSI_LOG_CONFIG,
					    "BG_%d : UE_HIGH %s bit set\n",
					    desc_ue_status_hi[i]);
		}
	}
}

int be_cmd_modify_eq_delay(struct beiscsi_hba *phba,
		 struct be_set_eqd *set_eqd, int num)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_req_modify_eq_delay *req;
	unsigned int tag;
	int i;

	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_COMMON,
		OPCODE_COMMON_MODIFY_EQ_DELAY, sizeof(*req));

	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);
	}

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

/**
 * mgmt_reopen_session()- Reopen a session based on reopen_type
 * @phba: Device priv structure instance
 * @reopen_type: Type of reopen_session FW should do.
 * @sess_handle: Session Handle of the session to be re-opened
 *
 * return
 *	the TAG used for MBOX Command
 *
 **/
unsigned int mgmt_reopen_session(struct beiscsi_hba *phba,
				  unsigned int reopen_type,
				  unsigned int sess_handle)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_reopen_session_req *req;
	unsigned int tag;

	beiscsi_log(phba, KERN_INFO,
		    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
		    "BG_%d : In bescsi_get_boot_target\n");

	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));

	/* set the reopen_type,sess_handle */
	req->reopen_type = reopen_type;
	req->session_handle = sess_handle;

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

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

	beiscsi_log(phba, KERN_INFO,
		    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
		    "BG_%d : In bescsi_get_boot_target\n");

	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));

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

unsigned int mgmt_get_session_info(struct beiscsi_hba *phba,
				   u32 boot_session_handle,
				   struct be_dma_mem *nonemb_cmd)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	unsigned int tag;
	struct  be_cmd_get_session_req *req;
	struct be_cmd_get_session_resp *resp;
	struct be_sge *sge;

	beiscsi_log(phba, KERN_INFO,
		    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
		    "BG_%d : In beiscsi_get_session_info\n");

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

	nonemb_cmd->size = sizeof(*resp);
	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(*resp));
	req->session_handle = boot_session_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);

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

/**
 * mgmt_get_port_name()- Get port name for the function
 * @ctrl: ptr to Ctrl Info
 * @phba: ptr to the dev priv structure
 *
 * Get the alphanumeric character for port
 *
 **/
int mgmt_get_port_name(struct be_ctrl_info *ctrl,
		       struct beiscsi_hba *phba)
{
	int ret = 0;
	struct be_mcc_wrb *wrb;
	struct be_cmd_get_port_name *ioctl;

	mutex_lock(&ctrl->mbox_lock);
	wrb = wrb_from_mbox(&ctrl->mbox_mem);
	memset(wrb, 0, sizeof(*wrb));
	ioctl = embedded_payload(wrb);

	be_wrb_hdr_prepare(wrb, sizeof(*ioctl), true, 0);
	be_cmd_hdr_prepare(&ioctl->h.req_hdr, CMD_SUBSYSTEM_COMMON,
			   OPCODE_COMMON_GET_PORT_NAME,
			   EMBED_MBX_MAX_PAYLOAD_SIZE);
	ret = be_mbox_notify(ctrl);
	phba->port_name = 0;
	if (!ret) {
		phba->port_name = ioctl->p.resp.port_names >>
				  (phba->fw_config.phys_port * 8) & 0xff;
	} else {
		beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
			    "BG_%d : GET_PORT_NAME ret 0x%x status 0x%x\n",
			    ret, ioctl->h.resp_hdr.status);
	}

	if (phba->port_name == 0)
		phba->port_name = '?';

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

/**
 * mgmt_get_fw_config()- Get the FW config for the function
 * @ctrl: ptr to Ctrl Info
 * @phba: ptr to the dev priv structure
 *
 * Get the FW config and resources available for the function.
 * The resources are created based on the count received here.
 *
 * return
 *	Success: 0
 *	Failure: Non-Zero Value
 **/
int mgmt_get_fw_config(struct be_ctrl_info *ctrl,
				struct beiscsi_hba *phba)
{
	struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);
	struct be_fw_cfg *pfw_cfg = embedded_payload(wrb);
	uint32_t cid_count, icd_count;
	int status = -EINVAL;
	uint8_t ulp_num = 0;

	mutex_lock(&ctrl->mbox_lock);
	memset(wrb, 0, sizeof(*wrb));
	be_wrb_hdr_prepare(wrb, sizeof(*pfw_cfg), true, 0);

	be_cmd_hdr_prepare(&pfw_cfg->hdr, CMD_SUBSYSTEM_COMMON,
			   OPCODE_COMMON_QUERY_FIRMWARE_CONFIG,
			   EMBED_MBX_MAX_PAYLOAD_SIZE);

	if (be_mbox_notify(ctrl)) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BG_%d : Failed in mgmt_get_fw_config\n");
		goto fail_init;
	}

	/* FW response formats depend on port id */
	phba->fw_config.phys_port = pfw_cfg->phys_port;
	if (phba->fw_config.phys_port >= BEISCSI_PHYS_PORT_MAX) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BG_%d : invalid physical port id %d\n",
			    phba->fw_config.phys_port);
		goto fail_init;
	}

	/* populate and check FW config against min and max values */
	if (!is_chip_be2_be3r(phba)) {
		phba->fw_config.eqid_count = pfw_cfg->eqid_count;
		phba->fw_config.cqid_count = pfw_cfg->cqid_count;
		if (phba->fw_config.eqid_count == 0 ||
		    phba->fw_config.eqid_count > 2048) {
			beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
				    "BG_%d : invalid EQ count %d\n",
				    phba->fw_config.eqid_count);
			goto fail_init;
		}
		if (phba->fw_config.cqid_count == 0 ||
		    phba->fw_config.cqid_count > 4096) {
			beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
				    "BG_%d : invalid CQ count %d\n",
				    phba->fw_config.cqid_count);
			goto fail_init;
		}
		beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
			    "BG_%d : EQ_Count : %d CQ_Count : %d\n",
			    phba->fw_config.eqid_count,
			    phba->fw_config.cqid_count);
	}

	/**
	 * Check on which all ULP iSCSI Protocol is loaded.
	 * Set the Bit for those ULP. This set flag is used
	 * at all places in the code to check on which ULP
	 * iSCSi Protocol is loaded
	 **/
	for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
		if (pfw_cfg->ulp[ulp_num].ulp_mode &
		    BEISCSI_ULP_ISCSI_INI_MODE) {
			set_bit(ulp_num, &phba->fw_config.ulp_supported);

			/* Get the CID, ICD and Chain count for each ULP */
			phba->fw_config.iscsi_cid_start[ulp_num] =
				pfw_cfg->ulp[ulp_num].sq_base;
			phba->fw_config.iscsi_cid_count[ulp_num] =
				pfw_cfg->ulp[ulp_num].sq_count;

			phba->fw_config.iscsi_icd_start[ulp_num] =
				pfw_cfg->ulp[ulp_num].icd_base;
			phba->fw_config.iscsi_icd_count[ulp_num] =
				pfw_cfg->ulp[ulp_num].icd_count;

			phba->fw_config.iscsi_chain_start[ulp_num] =
				pfw_cfg->chain_icd[ulp_num].chain_base;
			phba->fw_config.iscsi_chain_count[ulp_num] =
				pfw_cfg->chain_icd[ulp_num].chain_count;

			beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
				    "BG_%d : Function loaded on ULP : %d\n"
				    "\tiscsi_cid_count : %d\n"
				    "\tiscsi_cid_start : %d\n"
				    "\t iscsi_icd_count : %d\n"
				    "\t iscsi_icd_start : %d\n",
				    ulp_num,
				    phba->fw_config.
				    iscsi_cid_count[ulp_num],
				    phba->fw_config.
				    iscsi_cid_start[ulp_num],
				    phba->fw_config.
				    iscsi_icd_count[ulp_num],
				    phba->fw_config.
				    iscsi_icd_start[ulp_num]);
		}
	}

	if (phba->fw_config.ulp_supported == 0) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BG_%d : iSCSI initiator mode not set: ULP0 %x ULP1 %x\n",
			    pfw_cfg->ulp[BEISCSI_ULP0].ulp_mode,
			    pfw_cfg->ulp[BEISCSI_ULP1].ulp_mode);
		goto fail_init;
	}

	/**
	 * ICD is shared among ULPs. Use icd_count of any one loaded ULP
	 **/
	for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++)
		if (test_bit(ulp_num, &phba->fw_config.ulp_supported))
			break;
	icd_count = phba->fw_config.iscsi_icd_count[ulp_num];
	if (icd_count == 0 || icd_count > 65536) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BG_%d: invalid ICD count %d\n", icd_count);
		goto fail_init;
	}

	cid_count = BEISCSI_GET_CID_COUNT(phba, BEISCSI_ULP0) +
		    BEISCSI_GET_CID_COUNT(phba, BEISCSI_ULP1);
	if (cid_count == 0 || cid_count > 4096) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BG_%d: invalid CID count %d\n", cid_count);
		goto fail_init;
	}

	/**
	 * Check FW is dual ULP aware i.e. can handle either
	 * of the protocols.
	 */
	phba->fw_config.dual_ulp_aware = (pfw_cfg->function_mode &
					  BEISCSI_FUNC_DUA_MODE);

	beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
		    "BG_%d : DUA Mode : 0x%x\n",
		    phba->fw_config.dual_ulp_aware);

	/* all set, continue using this FW config */
	status = 0;
fail_init:
	mutex_unlock(&ctrl->mbox_lock);
	return status;
}

int mgmt_check_supported_fw(struct be_ctrl_info *ctrl,
				      struct beiscsi_hba *phba)
{
	struct be_dma_mem nonemb_cmd;
	struct be_mcc_wrb *wrb = wrb_from_mbox(&ctrl->mbox_mem);
	struct be_mgmt_controller_attributes *req;
	struct be_sge *sge = nonembedded_sgl(wrb);
	int status = 0;

	nonemb_cmd.va = pci_alloc_consistent(ctrl->pdev,
				sizeof(struct be_mgmt_controller_attributes),
				&nonemb_cmd.dma);
	if (nonemb_cmd.va == NULL) {
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BG_%d : Failed to allocate memory for "
			    "mgmt_check_supported_fw\n");
		return -ENOMEM;
	}
	nonemb_cmd.size = sizeof(struct be_mgmt_controller_attributes);
	req = nonemb_cmd.va;
	memset(req, 0, sizeof(*req));
	mutex_lock(&ctrl->mbox_lock);
	memset(wrb, 0, sizeof(*wrb));
	be_wrb_hdr_prepare(wrb, sizeof(*req), false, 1);
	be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
			   OPCODE_COMMON_GET_CNTL_ATTRIBUTES, sizeof(*req));
	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);
	status = be_mbox_notify(ctrl);
	if (!status) {
		struct be_mgmt_controller_attributes_resp *resp = nonemb_cmd.va;
		beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
			    "BG_%d : Firmware Version of CMD : %s\n"
			    "Firmware Version is : %s\n"
			    "Developer Build, not performing version check...\n",
			    resp->params.hba_attribs
			    .flashrom_version_string,
			    resp->params.hba_attribs.
			    firmware_version_string);

		phba->fw_config.iscsi_features =
				resp->params.hba_attribs.iscsi_features;
		beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
			    "BM_%d : phba->fw_config.iscsi_features = %d\n",
			    phba->fw_config.iscsi_features);
		memcpy(phba->fw_ver_str, resp->params.hba_attribs.
		       firmware_version_string, BEISCSI_VER_STRLEN);
	} else
		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
			    "BG_%d :  Failed in mgmt_check_supported_fw\n");
	mutex_unlock(&ctrl->mbox_lock);
	if (nonemb_cmd.va)
		pci_free_consistent(ctrl->pdev, nonemb_cmd.size,
				    nonemb_cmd.va, nonemb_cmd.dma);

	return status;
}

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_cmd_resp_hdr *resp;
	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);
	resp = nonemb_cmd->va;
	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_epfw_cleanup()- Inform FW to cleanup data structures.
 * @phba: pointer to dev priv structure
 * @ulp_num: ULP number.
 *
 * return
 *	Success: 0
 *	Failure: Non-Zero Value
 **/
int mgmt_epfw_cleanup(struct beiscsi_hba *phba, unsigned short ulp_num)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct iscsi_cleanup_req *req;
	unsigned int tag;
	int status;

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

	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_CLEANUP, sizeof(*req));

	req->chute = (1 << ulp_num);
	req->hdr_ring_id = cpu_to_le16(HWI_GET_DEF_HDRQ_ID(phba, ulp_num));
	req->data_ring_id = cpu_to_le16(HWI_GET_DEF_BUFQ_ID(phba, ulp_num));

	be_mcc_notify(phba, tag);
	status = be_mcc_compl_poll(phba, tag);
	if (status)
		beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_INIT,
			    "BG_%d : mgmt_epfw_cleanup , FAILED\n");
	mutex_unlock(&ctrl->mbox_lock);
	return status;
}

unsigned int  mgmt_invalidate_icds(struct beiscsi_hba *phba,
				struct invalidate_command_table *inv_tbl,
				unsigned int num_invalidate, unsigned int cid,
				struct be_dma_mem *nonemb_cmd)

{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_sge *sge;
	struct invalidate_commands_params_in *req;
	unsigned int i, tag;

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		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,
			OPCODE_COMMON_ISCSI_ERROR_RECOVERY_INVALIDATE_COMMANDS,
			sizeof(*req));
	req->ref_handle = 0;
	req->cleanup_type = CMD_ISCSI_COMMAND_INVALIDATE;
	for (i = 0; i < num_invalidate; i++) {
		req->table[i].icd = inv_tbl->icd;
		req->table[i].cid = inv_tbl->cid;
		req->icd_count++;
		inv_tbl++;
	}
	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);

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

unsigned int mgmt_invalidate_connection(struct beiscsi_hba *phba,
					 struct beiscsi_endpoint *beiscsi_ep,
					 unsigned short cid,
					 unsigned short issue_reset,
					 unsigned short savecfg_flag)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct iscsi_invalidate_connection_params_in *req;
	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(*req), 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 = cid;
	if (issue_reset)
		req->cleanup_type = CMD_ISCSI_CONNECTION_ISSUE_TCP_RST;
	else
		req->cleanup_type = CMD_ISCSI_CONNECTION_INVALIDATE;
	req->save_cfg = savecfg_flag;
	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);
	return tag;
}

unsigned int mgmt_upload_connection(struct beiscsi_hba *phba,
				unsigned short cid, unsigned int upload_flag)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct 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(*req), true, 0);
	be_cmd_hdr_prepare(&req->hdr, CMD_COMMON_TCP_UPLOAD,
			   OPCODE_COMMON_TCP_UPLOAD, sizeof(*req));
	req->id = (unsigned short)cid;
	req->upload_type = (unsigned char)upload_flag;
	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);
	return tag;
}

/**
 * mgmt_open_connection()- Establish a TCP CXN
 * @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 -EINVAL;
	}

	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 = 0;
		req->tcp_window_scale_count = 2;
	}

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

/*
 * mgmt_exec_nonemb_cmd()- Execute Non Embedded MBX Cmd
 * @phba: Driver priv structure
 * @nonemb_cmd: Address of the MBX command issued
 * @resp_buf: Buffer to copy the MBX cmd response
 * @resp_buf_len: respone lenght to be copied
 *
 **/
static int mgmt_exec_nonemb_cmd(struct beiscsi_hba *phba,
				struct be_dma_mem *nonemb_cmd, void *resp_buf,
				int 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);
		rc = -ENOMEM;
		goto free_cmd;
	}

	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);

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

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

	if (resp_buf)
		memcpy(resp_buf, nonemb_cmd->va, resp_buf_len);

	if (rc) {
		/* Check if the MBX Cmd needs to be re-issued */
		if (rc == -EAGAIN)
			return rc;

		beiscsi_log(phba, KERN_WARNING,
			    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
			    "BG_%d : mgmt_exec_nonemb_cmd Failed status\n");

		if (rc != -EBUSY)
			goto free_cmd;
		else
			return rc;
	}
free_cmd:
	pci_free_consistent(ctrl->pdev, nonemb_cmd->size,
			    nonemb_cmd->va, nonemb_cmd->dma);
	return rc;
}

static int mgmt_alloc_cmd_data(struct beiscsi_hba *phba, struct be_dma_mem *cmd,
			       int iscsi_cmd, int size)
{
	cmd->va = pci_zalloc_consistent(phba->ctrl.pdev, size, &cmd->dma);
	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, CMD_SUBSYSTEM_ISCSI, iscsi_cmd, size);
	beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
		    "BG_%d : subsystem iSCSI cmd %d size %d\n",
		    iscsi_cmd, size);
	return 0;
}

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 = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				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);
	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
}

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

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

	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, resp,
				    sizeof(*resp));
}

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 = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				 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 = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, 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);
	}
	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 = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				 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 = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, 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;
	}
	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 = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				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 = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
		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 = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
			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 = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);

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 = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
					 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");

				/* Free the DMA memory for the IOCTL issuing */
				pci_free_consistent(phba->ctrl.pdev,
						    nonemb_cmd.size,
						    nonemb_cmd.va,
						    nonemb_cmd.dma);
				return -ENOMEM;
		}

		rc =  mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, *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);

			/* Free the previous allocated DMA memory */
			pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
					    nonemb_cmd.va,
					    nonemb_cmd.dma);

			/* Free the virtual memory */
			kfree(*if_info);
		} else
			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 = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
				 OPCODE_COMMON_ISCSI_NTWK_GET_NIC_CONFIG,
				 sizeof(*nic));
	if (rc)
		return rc;

	return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, nic, sizeof(*nic));
}


unsigned int be_cmd_get_initname(struct beiscsi_hba *phba)
{
	unsigned int tag;
	struct be_mcc_wrb *wrb;
	struct be_cmd_hba_name *req;
	struct be_ctrl_info *ctrl = &phba->ctrl;

	if (mutex_lock_interruptible(&ctrl->mbox_lock))
		return 0;
	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_CFG_GET_HBA_NAME,
			sizeof(*req));

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

/**
 * be_mgmt_get_boot_shandle()- Get the session handle
 * @phba: device priv structure instance
 * @s_handle: session handle returned for boot session.
 *
 * Get the boot target session handle. In case of
 * crashdump mode driver has to issue and MBX Cmd
 * for FW to login to boot target
 *
 * return
 *	Success: 0
 *	Failure: Non-Zero value
 *
 **/
int be_mgmt_get_boot_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;
	uint8_t boot_retry = 3;
	int rc;

	do {
		/* Get the Boot Target Session Handle and Count*/
		tag = mgmt_get_boot_target(phba);
		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 the there are any Boot targets configured */
		if (!boot_resp->boot_session_count) {
			beiscsi_log(phba, KERN_INFO,
				    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
				    "BG_%d  ;No boot targets configured\n");
			return -ENXIO;
		}

		/* FW returns the session handle of the boot session */
		if (boot_resp->boot_session_handle != INVALID_SESS_HANDLE) {
			*s_handle = boot_resp->boot_session_handle;
			return 0;
		}

		/* Issue MBX Cmd to FW to login to the boot target */
		tag = mgmt_reopen_session(phba, BE_REOPEN_BOOT_SESSIONS,
					  INVALID_SESS_HANDLE);
		if (!tag) {
			beiscsi_log(phba, KERN_ERR,
				    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
				    "BG_%d : mgmt_reopen_session Failed\n");
			return -EAGAIN;
		}

		rc = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
		if (rc) {
			beiscsi_log(phba, KERN_ERR,
				    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
				    "BG_%d : mgmt_reopen_session Failed");
			return rc;
		}
	} while (--boot_retry);

	/* Couldn't log into the boot target */
	beiscsi_log(phba, KERN_ERR,
		    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
		    "BG_%d : Login to Boot Target Failed\n");
	return -ENXIO;
}

/**
 * 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 += snprintf(buf+len, PAGE_SIZE - len,
					"ULP%d : %d\n", ulp_num,
					(total_cids - avlbl_cids));
		} else
			len += snprintf(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 += snprintf(buf+len, PAGE_SIZE - len,
					"ULP%d : %d\n", ulp_num,
					BEISCSI_ULP_AVLBL_CID(phba, ulp_num));
		else
			len += snprintf(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, "BE2 Adapter Family\n");
		break;
	case BE_DEVICE_ID2:
	case OC_DEVICE_ID3:
		return snprintf(buf, PAGE_SIZE, "BE3-R Adapter Family\n");
		break;
	case OC_SKH_ID1:
		return snprintf(buf, PAGE_SIZE, "Skyhawk-R Adapter Family\n");
		break;
	default:
		return snprintf(buf, PAGE_SIZE,
				"Unknown Adapter Family: 0x%x\n", dev_id);
		break;
	}
}

/**
 * beiscsi_phys_port()- 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 : %d\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;

	memset(pwrb, 0, sizeof(*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;

	memset(pwrb, 0, sizeof(*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));
}

/**
 * beiscsi_logout_fw_sess()- Firmware Session Logout
 * @phba: Device priv structure instance
 * @fw_sess_handle: FW session handle
 *
 * Logout from the FW established sessions.
 * returns
 *  Success: 0
 *  Failure: Non-Zero Value
 *
 */
int beiscsi_logout_fw_sess(struct beiscsi_hba *phba,
		uint32_t fw_sess_handle)
{
	struct be_ctrl_info *ctrl = &phba->ctrl;
	struct be_mcc_wrb *wrb;
	struct be_cmd_req_logout_fw_sess *req;
	struct be_cmd_resp_logout_fw_sess *resp;
	unsigned int tag;
	int rc;

	beiscsi_log(phba, KERN_INFO,
		    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
		    "BG_%d : In bescsi_logout_fwboot_sess\n");

	mutex_lock(&ctrl->mbox_lock);
	wrb = alloc_mcc_wrb(phba, &tag);
	if (!wrb) {
		mutex_unlock(&ctrl->mbox_lock);
		beiscsi_log(phba, KERN_INFO,
			    BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
			    "BG_%d : MBX Tag Failure\n");
		return -EINVAL;
	}

	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));

	/* Set the session handle */
	req->session_handle = fw_sess_handle;
	be_mcc_notify(phba, tag);
	mutex_unlock(&ctrl->mbox_lock);

	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 FW_SESSION_LOGOUT_TARGET Failed\n");
		return -EBUSY;
	}

	resp = embedded_payload(wrb);
	if (resp->session_status !=
		BEISCSI_MGMT_SESSION_CLOSE) {
		beiscsi_log(phba, KERN_ERR,
			    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
			    "BG_%d : FW_SESSION_LOGOUT_TARGET resp : 0x%x\n",
			    resp->session_status);
		rc = -EINVAL;
	}

	return rc;
}