/*
 * QLogic iSCSI HBA Driver
 * Copyright (c)  2003-2012 QLogic Corporation
 *
 * See LICENSE.qla4xxx for copyright and licensing details.
 */

#include "ql4_def.h"
#include "ql4_glbl.h"
#include "ql4_dbg.h"
#include "ql4_inline.h"
#include "ql4_version.h"

void qla4xxx_queue_mbox_cmd(struct scsi_qla_host *ha, uint32_t *mbx_cmd,
                            int in_count)
{
        int i;

        /* Load all mailbox registers, except mailbox 0. */
        for (i = 1; i < in_count; i++)
                writel(mbx_cmd[i], &ha->reg->mailbox[i]);

        /* Wakeup firmware  */
        writel(mbx_cmd[0], &ha->reg->mailbox[0]);
        readl(&ha->reg->mailbox[0]);
        writel(set_rmask(CSR_INTR_RISC), &ha->reg->ctrl_status);
        readl(&ha->reg->ctrl_status);
}

void qla4xxx_process_mbox_intr(struct scsi_qla_host *ha, int out_count)
{
        int intr_status;

        intr_status = readl(&ha->reg->ctrl_status);
        if (intr_status & INTR_PENDING) {
                /*
                 * Service the interrupt.
                 * The ISR will save the mailbox status registers
                 * to a temporary storage location in the adapter structure.
                 */
                ha->mbox_status_count = out_count;
                ha->isp_ops->interrupt_service_routine(ha, intr_status);
        }
}

/**
 * qla4xxx_is_intr_poll_mode – Are we allowed to poll for interrupts?
 * @ha: Pointer to host adapter structure.
 * @ret: 1=polling mode, 0=non-polling mode
 **/
static int qla4xxx_is_intr_poll_mode(struct scsi_qla_host *ha)
{
        int rval = 1;

        if (is_qla8032(ha)) {
                if (test_bit(AF_IRQ_ATTACHED, &ha->flags) &&
                    test_bit(AF_83XX_MBOX_INTR_ON, &ha->flags))
                        rval = 0;
        } else {
                if (test_bit(AF_IRQ_ATTACHED, &ha->flags) &&
                    test_bit(AF_INTERRUPTS_ON, &ha->flags) &&
                    test_bit(AF_ONLINE, &ha->flags) &&
                    !test_bit(AF_HA_REMOVAL, &ha->flags))
                        rval = 0;
        }

        return rval;
}

/**
 * qla4xxx_mailbox_command - issues mailbox commands
 * @ha: Pointer to host adapter structure.
 * @inCount: number of mailbox registers to load.
 * @outCount: number of mailbox registers to return.
 * @mbx_cmd: data pointer for mailbox in registers.
 * @mbx_sts: data pointer for mailbox out registers.
 *
 * This routine issue mailbox commands and waits for completion.
 * If outCount is 0, this routine completes successfully WITHOUT waiting
 * for the mailbox command to complete.
 **/
int qla4xxx_mailbox_command(struct scsi_qla_host *ha, uint8_t inCount,
                            uint8_t outCount, uint32_t *mbx_cmd,
                            uint32_t *mbx_sts)
{
        int status = QLA_ERROR;
        uint8_t i;
        u_long wait_count;
        unsigned long flags = 0;
        uint32_t dev_state;

        /* Make sure that pointers are valid */
        if (!mbx_cmd || !mbx_sts) {
                DEBUG2(printk("scsi%ld: %s: Invalid mbx_cmd or mbx_sts "
                              "pointer\n", ha->host_no, __func__));
                return status;
        }

        if (is_qla40XX(ha)) {
                if (test_bit(AF_HA_REMOVAL, &ha->flags)) {
                        DEBUG2(ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: "
                                          "prematurely completing mbx cmd as "
                                          "adapter removal detected\n",
                                          ha->host_no, __func__));
                        return status;
                }
        }

        if ((is_aer_supported(ha)) &&
            (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))) {
                DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Perm failure on EEH, "
                    "timeout MBX Exiting.\n", ha->host_no, __func__));
                return status;
        }

        /* Mailbox code active */
        wait_count = MBOX_TOV * 100;

        while (wait_count--) {
                mutex_lock(&ha->mbox_sem);
                if (!test_bit(AF_MBOX_COMMAND, &ha->flags)) {
                        set_bit(AF_MBOX_COMMAND, &ha->flags);
                        mutex_unlock(&ha->mbox_sem);
                        break;
                }
                mutex_unlock(&ha->mbox_sem);
                if (!wait_count) {
                        DEBUG2(printk("scsi%ld: %s: mbox_sem failed\n",
                                ha->host_no, __func__));
                        return status;
                }
                msleep(10);
        }

        if (is_qla80XX(ha)) {
                if (test_bit(AF_FW_RECOVERY, &ha->flags)) {
                        DEBUG2(ql4_printk(KERN_WARNING, ha,
                                          "scsi%ld: %s: prematurely completing mbx cmd as firmware recovery detected\n",
                                          ha->host_no, __func__));
                        goto mbox_exit;
                }
                /* Do not send any mbx cmd if h/w is in failed state*/
                ha->isp_ops->idc_lock(ha);
                dev_state = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DEV_STATE);
                ha->isp_ops->idc_unlock(ha);
                if (dev_state == QLA8XXX_DEV_FAILED) {
                        ql4_printk(KERN_WARNING, ha,
                                   "scsi%ld: %s: H/W is in failed state, do not send any mailbox commands\n",
                                   ha->host_no, __func__);
                        goto mbox_exit;
                }
        }

        spin_lock_irqsave(&ha->hardware_lock, flags);

        ha->mbox_status_count = outCount;
        for (i = 0; i < outCount; i++)
                ha->mbox_status[i] = 0;

        /* Queue the mailbox command to the firmware */
        ha->isp_ops->queue_mailbox_command(ha, mbx_cmd, inCount);

        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        /* Wait for completion */

        /*
         * If we don't want status, don't wait for the mailbox command to
         * complete.  For example, MBOX_CMD_RESET_FW doesn't return status,
         * you must poll the inbound Interrupt Mask for completion.
         */
        if (outCount == 0) {
                status = QLA_SUCCESS;
                goto mbox_exit;
        }

        /*
         * Wait for completion: Poll or completion queue
         */
        if (qla4xxx_is_intr_poll_mode(ha)) {
                /* Poll for command to complete */
                wait_count = jiffies + MBOX_TOV * HZ;
                while (test_bit(AF_MBOX_COMMAND_DONE, &ha->flags) == 0) {
                        if (time_after_eq(jiffies, wait_count))
                                break;
                        /*
                         * Service the interrupt.
                         * The ISR will save the mailbox status registers
                         * to a temporary storage location in the adapter
                         * structure.
                         */
                        spin_lock_irqsave(&ha->hardware_lock, flags);
                        ha->isp_ops->process_mailbox_interrupt(ha, outCount);
                        spin_unlock_irqrestore(&ha->hardware_lock, flags);
                        msleep(10);
                }
        } else {
                /* Do not poll for completion. Use completion queue */
                set_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags);
                wait_for_completion_timeout(&ha->mbx_intr_comp, MBOX_TOV * HZ);
                clear_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags);
        }

        /* Check for mailbox timeout. */
        if (!test_bit(AF_MBOX_COMMAND_DONE, &ha->flags)) {
                if (is_qla80XX(ha) &&
                    test_bit(AF_FW_RECOVERY, &ha->flags)) {
                        DEBUG2(ql4_printk(KERN_INFO, ha,
                            "scsi%ld: %s: prematurely completing mbx cmd as "
                            "firmware recovery detected\n",
                            ha->host_no, __func__));
                        goto mbox_exit;
                }
                DEBUG2(printk("scsi%ld: Mailbox Cmd 0x%08X timed out ...,"
                              " Scheduling Adapter Reset\n", ha->host_no,
                              mbx_cmd[0]));
                ha->mailbox_timeout_count++;
                mbx_sts[0] = (-1);
                set_bit(DPC_RESET_HA, &ha->dpc_flags);
                if (is_qla8022(ha)) {
                        ql4_printk(KERN_INFO, ha,
                                   "disabling pause transmit on port 0 & 1.\n");
                        qla4_82xx_wr_32(ha, QLA82XX_CRB_NIU + 0x98,
                                        CRB_NIU_XG_PAUSE_CTL_P0 |
                                        CRB_NIU_XG_PAUSE_CTL_P1);
                } else if (is_qla8032(ha)) {
                        ql4_printk(KERN_INFO, ha, " %s: disabling pause transmit on port 0 & 1.\n",
                                   __func__);
                        qla4_83xx_disable_pause(ha);
                }
                goto mbox_exit;
        }

        /*
         * Copy the mailbox out registers to the caller's mailbox in/out
         * structure.
         */
        spin_lock_irqsave(&ha->hardware_lock, flags);
        for (i = 0; i < outCount; i++)
                mbx_sts[i] = ha->mbox_status[i];

        /* Set return status and error flags (if applicable). */
        switch (ha->mbox_status[0]) {
        case MBOX_STS_COMMAND_COMPLETE:
                status = QLA_SUCCESS;
                break;

        case MBOX_STS_INTERMEDIATE_COMPLETION:
                status = QLA_SUCCESS;
                break;

        case MBOX_STS_BUSY:
                DEBUG2( printk("scsi%ld: %s: Cmd = %08X, ISP BUSY\n",
                               ha->host_no, __func__, mbx_cmd[0]));
                ha->mailbox_timeout_count++;
                break;

        default:
                DEBUG2(printk("scsi%ld: %s: **** FAILED, cmd = %08X, "
                              "sts = %08X ****\n", ha->host_no, __func__,
                              mbx_cmd[0], mbx_sts[0]));
                break;
        }
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

mbox_exit:
        mutex_lock(&ha->mbox_sem);
        clear_bit(AF_MBOX_COMMAND, &ha->flags);
        mutex_unlock(&ha->mbox_sem);
        clear_bit(AF_MBOX_COMMAND_DONE, &ha->flags);

        return status;
}

/**
 * qla4xxx_get_minidump_template - Get the firmware template
 * @ha: Pointer to host adapter structure.
 * @phys_addr: dma address for template
 *
 * Obtain the minidump template from firmware during initialization
 * as it may not be available when minidump is desired.
 **/
int qla4xxx_get_minidump_template(struct scsi_qla_host *ha,
                                  dma_addr_t phys_addr)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_MINIDUMP;
        mbox_cmd[1] = MINIDUMP_GET_TMPLT_SUBCOMMAND;
        mbox_cmd[2] = LSDW(phys_addr);
        mbox_cmd[3] = MSDW(phys_addr);
        mbox_cmd[4] = ha->fw_dump_tmplt_size;
        mbox_cmd[5] = 0;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 2, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_INFO, ha,
                                  "scsi%ld: %s: Cmd = %08X, mbx[0] = 0x%04x, mbx[1] = 0x%04x\n",
                                  ha->host_no, __func__, mbox_cmd[0],
                                  mbox_sts[0], mbox_sts[1]));
        }
        return status;
}

/**
 * qla4xxx_req_template_size - Get minidump template size from firmware.
 * @ha: Pointer to host adapter structure.
 **/
int qla4xxx_req_template_size(struct scsi_qla_host *ha)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_MINIDUMP;
        mbox_cmd[1] = MINIDUMP_GET_SIZE_SUBCOMMAND;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 8, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status == QLA_SUCCESS) {
                ha->fw_dump_tmplt_size = mbox_sts[1];
                DEBUG2(ql4_printk(KERN_INFO, ha,
                                  "%s: sts[0]=0x%04x, template  size=0x%04x, size_cm_02=0x%04x, size_cm_04=0x%04x, size_cm_08=0x%04x, size_cm_10=0x%04x, size_cm_FF=0x%04x, version=0x%04x\n",
                                  __func__, mbox_sts[0], mbox_sts[1],
                                  mbox_sts[2], mbox_sts[3], mbox_sts[4],
                                  mbox_sts[5], mbox_sts[6], mbox_sts[7]));
                if (ha->fw_dump_tmplt_size == 0)
                        status = QLA_ERROR;
        } else {
                ql4_printk(KERN_WARNING, ha,
                           "%s: Error sts[0]=0x%04x, mbx[1]=0x%04x\n",
                           __func__, mbox_sts[0], mbox_sts[1]);
                status = QLA_ERROR;
        }

        return status;
}

void qla4xxx_mailbox_premature_completion(struct scsi_qla_host *ha)
{
        set_bit(AF_FW_RECOVERY, &ha->flags);
        ql4_printk(KERN_INFO, ha, "scsi%ld: %s: set FW RECOVERY!\n",
            ha->host_no, __func__);

        if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
                if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) {
                        complete(&ha->mbx_intr_comp);
                        ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Due to fw "
                            "recovery, doing premature completion of "
                            "mbx cmd\n", ha->host_no, __func__);

                } else {
                        set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
                        ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Due to fw "
                            "recovery, doing premature completion of "
                            "polling mbx cmd\n", ha->host_no, __func__);
                }
        }
}

static uint8_t
qla4xxx_set_ifcb(struct scsi_qla_host *ha, uint32_t *mbox_cmd,
                 uint32_t *mbox_sts, dma_addr_t init_fw_cb_dma)
{
        memset(mbox_cmd, 0, sizeof(mbox_cmd[0]) * MBOX_REG_COUNT);
        memset(mbox_sts, 0, sizeof(mbox_sts[0]) * MBOX_REG_COUNT);

        if (is_qla8022(ha))
                qla4_82xx_wr_32(ha, ha->nx_db_wr_ptr, 0);

        mbox_cmd[0] = MBOX_CMD_INITIALIZE_FIRMWARE;
        mbox_cmd[1] = 0;
        mbox_cmd[2] = LSDW(init_fw_cb_dma);
        mbox_cmd[3] = MSDW(init_fw_cb_dma);
        mbox_cmd[4] = sizeof(struct addr_ctrl_blk);
        mbox_cmd[5] = (IFCB_VER_MAX << 8) | IFCB_VER_MIN;

        if (qla4xxx_mailbox_command(ha, 6, 6, mbox_cmd, mbox_sts) !=
            QLA_SUCCESS) {
                DEBUG2(printk(KERN_WARNING "scsi%ld: %s: "
                              "MBOX_CMD_INITIALIZE_FIRMWARE"
                              " failed w/ status %04X\n",
                              ha->host_no, __func__, mbox_sts[0]));
                return QLA_ERROR;
        }
        return QLA_SUCCESS;
}

uint8_t
qla4xxx_get_ifcb(struct scsi_qla_host *ha, uint32_t *mbox_cmd,
                 uint32_t *mbox_sts, dma_addr_t init_fw_cb_dma)
{
        memset(mbox_cmd, 0, sizeof(mbox_cmd[0]) * MBOX_REG_COUNT);
        memset(mbox_sts, 0, sizeof(mbox_sts[0]) * MBOX_REG_COUNT);
        mbox_cmd[0] = MBOX_CMD_GET_INIT_FW_CTRL_BLOCK;
        mbox_cmd[2] = LSDW(init_fw_cb_dma);
        mbox_cmd[3] = MSDW(init_fw_cb_dma);
        mbox_cmd[4] = sizeof(struct addr_ctrl_blk);

        if (qla4xxx_mailbox_command(ha, 5, 5, mbox_cmd, mbox_sts) !=
            QLA_SUCCESS) {
                DEBUG2(printk(KERN_WARNING "scsi%ld: %s: "
                              "MBOX_CMD_GET_INIT_FW_CTRL_BLOCK"
                              " failed w/ status %04X\n",
                              ha->host_no, __func__, mbox_sts[0]));
                return QLA_ERROR;
        }
        return QLA_SUCCESS;
}

static void
qla4xxx_update_local_ip(struct scsi_qla_host *ha,
                        struct addr_ctrl_blk *init_fw_cb)
{
        ha->ip_config.tcp_options = le16_to_cpu(init_fw_cb->ipv4_tcp_opts);
        ha->ip_config.ipv4_options = le16_to_cpu(init_fw_cb->ipv4_ip_opts);
        ha->ip_config.ipv4_addr_state =
                                le16_to_cpu(init_fw_cb->ipv4_addr_state);
        ha->ip_config.eth_mtu_size =
                                le16_to_cpu(init_fw_cb->eth_mtu_size);
        ha->ip_config.ipv4_port = le16_to_cpu(init_fw_cb->ipv4_port);

        if (ha->acb_version == ACB_SUPPORTED) {
                ha->ip_config.ipv6_options = le16_to_cpu(init_fw_cb->ipv6_opts);
                ha->ip_config.ipv6_addl_options =
                                le16_to_cpu(init_fw_cb->ipv6_addtl_opts);
        }

        /* Save IPv4 Address Info */
        memcpy(ha->ip_config.ip_address, init_fw_cb->ipv4_addr,
               min(sizeof(ha->ip_config.ip_address),
                   sizeof(init_fw_cb->ipv4_addr)));
        memcpy(ha->ip_config.subnet_mask, init_fw_cb->ipv4_subnet,
               min(sizeof(ha->ip_config.subnet_mask),
                   sizeof(init_fw_cb->ipv4_subnet)));
        memcpy(ha->ip_config.gateway, init_fw_cb->ipv4_gw_addr,
               min(sizeof(ha->ip_config.gateway),
                   sizeof(init_fw_cb->ipv4_gw_addr)));

        ha->ip_config.ipv4_vlan_tag = be16_to_cpu(init_fw_cb->ipv4_vlan_tag);

        if (is_ipv6_enabled(ha)) {
                /* Save IPv6 Address */
                ha->ip_config.ipv6_link_local_state =
                        le16_to_cpu(init_fw_cb->ipv6_lnk_lcl_addr_state);
                ha->ip_config.ipv6_addr0_state =
                                le16_to_cpu(init_fw_cb->ipv6_addr0_state);
                ha->ip_config.ipv6_addr1_state =
                                le16_to_cpu(init_fw_cb->ipv6_addr1_state);
                ha->ip_config.ipv6_default_router_state =
                                le16_to_cpu(init_fw_cb->ipv6_dflt_rtr_state);
                ha->ip_config.ipv6_link_local_addr.in6_u.u6_addr8[0] = 0xFE;
                ha->ip_config.ipv6_link_local_addr.in6_u.u6_addr8[1] = 0x80;

                memcpy(&ha->ip_config.ipv6_link_local_addr.in6_u.u6_addr8[8],
                       init_fw_cb->ipv6_if_id,
                       min(sizeof(ha->ip_config.ipv6_link_local_addr)/2,
                           sizeof(init_fw_cb->ipv6_if_id)));
                memcpy(&ha->ip_config.ipv6_addr0, init_fw_cb->ipv6_addr0,
                       min(sizeof(ha->ip_config.ipv6_addr0),
                           sizeof(init_fw_cb->ipv6_addr0)));
                memcpy(&ha->ip_config.ipv6_addr1, init_fw_cb->ipv6_addr1,
                       min(sizeof(ha->ip_config.ipv6_addr1),
                           sizeof(init_fw_cb->ipv6_addr1)));
                memcpy(&ha->ip_config.ipv6_default_router_addr,
                       init_fw_cb->ipv6_dflt_rtr_addr,
                       min(sizeof(ha->ip_config.ipv6_default_router_addr),
                           sizeof(init_fw_cb->ipv6_dflt_rtr_addr)));
                ha->ip_config.ipv6_vlan_tag =
                                be16_to_cpu(init_fw_cb->ipv6_vlan_tag);
                ha->ip_config.ipv6_port = le16_to_cpu(init_fw_cb->ipv6_port);
        }
}

uint8_t
qla4xxx_update_local_ifcb(struct scsi_qla_host *ha,
                          uint32_t *mbox_cmd,
                          uint32_t *mbox_sts,
                          struct addr_ctrl_blk  *init_fw_cb,
                          dma_addr_t init_fw_cb_dma)
{
        if (qla4xxx_get_ifcb(ha, mbox_cmd, mbox_sts, init_fw_cb_dma)
            != QLA_SUCCESS) {
                DEBUG2(printk(KERN_WARNING
                              "scsi%ld: %s: Failed to get init_fw_ctrl_blk\n",
                              ha->host_no, __func__));
                return QLA_ERROR;
        }

        DEBUG2(qla4xxx_dump_buffer(init_fw_cb, sizeof(struct addr_ctrl_blk)));

        /* Save some info in adapter structure. */
        ha->acb_version = init_fw_cb->acb_version;
        ha->firmware_options = le16_to_cpu(init_fw_cb->fw_options);
        ha->heartbeat_interval = init_fw_cb->hb_interval;
        memcpy(ha->name_string, init_fw_cb->iscsi_name,
                min(sizeof(ha->name_string),
                sizeof(init_fw_cb->iscsi_name)));
        ha->def_timeout = le16_to_cpu(init_fw_cb->def_timeout);
        /*memcpy(ha->alias, init_fw_cb->Alias,
               min(sizeof(ha->alias), sizeof(init_fw_cb->Alias)));*/

        qla4xxx_update_local_ip(ha, init_fw_cb);

        return QLA_SUCCESS;
}

/**
 * qla4xxx_initialize_fw_cb - initializes firmware control block.
 * @ha: Pointer to host adapter structure.
 **/
int qla4xxx_initialize_fw_cb(struct scsi_qla_host * ha)
{
        struct addr_ctrl_blk *init_fw_cb;
        dma_addr_t init_fw_cb_dma;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_ERROR;

        init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
                                        sizeof(struct addr_ctrl_blk),
                                        &init_fw_cb_dma, GFP_KERNEL);
        if (init_fw_cb == NULL) {
                DEBUG2(printk("scsi%ld: %s: Unable to alloc init_cb\n",
                              ha->host_no, __func__));
                goto exit_init_fw_cb_no_free;
        }
        memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));

        /* Get Initialize Firmware Control Block. */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        if (qla4xxx_get_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma) !=
            QLA_SUCCESS) {
                dma_free_coherent(&ha->pdev->dev,
                                  sizeof(struct addr_ctrl_blk),
                                  init_fw_cb, init_fw_cb_dma);
                goto exit_init_fw_cb;
        }

        /* Initialize request and response queues. */
        qla4xxx_init_rings(ha);

        /* Fill in the request and response queue information. */
        init_fw_cb->rqq_consumer_idx = cpu_to_le16(ha->request_out);
        init_fw_cb->compq_producer_idx = cpu_to_le16(ha->response_in);
        init_fw_cb->rqq_len = __constant_cpu_to_le16(REQUEST_QUEUE_DEPTH);
        init_fw_cb->compq_len = __constant_cpu_to_le16(RESPONSE_QUEUE_DEPTH);
        init_fw_cb->rqq_addr_lo = cpu_to_le32(LSDW(ha->request_dma));
        init_fw_cb->rqq_addr_hi = cpu_to_le32(MSDW(ha->request_dma));
        init_fw_cb->compq_addr_lo = cpu_to_le32(LSDW(ha->response_dma));
        init_fw_cb->compq_addr_hi = cpu_to_le32(MSDW(ha->response_dma));
        init_fw_cb->shdwreg_addr_lo = cpu_to_le32(LSDW(ha->shadow_regs_dma));
        init_fw_cb->shdwreg_addr_hi = cpu_to_le32(MSDW(ha->shadow_regs_dma));

        /* Set up required options. */
        init_fw_cb->fw_options |=
                __constant_cpu_to_le16(FWOPT_SESSION_MODE |
                                       FWOPT_INITIATOR_MODE);

        if (is_qla80XX(ha))
                init_fw_cb->fw_options |=
                    __constant_cpu_to_le16(FWOPT_ENABLE_CRBDB);

        init_fw_cb->fw_options &= __constant_cpu_to_le16(~FWOPT_TARGET_MODE);

        init_fw_cb->add_fw_options = 0;
        init_fw_cb->add_fw_options |=
                        __constant_cpu_to_le16(ADFWOPT_SERIALIZE_TASK_MGMT);
        init_fw_cb->add_fw_options |=
                        __constant_cpu_to_le16(ADFWOPT_AUTOCONN_DISABLE);

        if (qla4xxx_set_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma)
                != QLA_SUCCESS) {
                DEBUG2(printk(KERN_WARNING
                              "scsi%ld: %s: Failed to set init_fw_ctrl_blk\n",
                              ha->host_no, __func__));
                goto exit_init_fw_cb;
        }

        if (qla4xxx_update_local_ifcb(ha, &mbox_cmd[0], &mbox_sts[0],
                init_fw_cb, init_fw_cb_dma) != QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: Failed to update local ifcb\n",
                                ha->host_no, __func__));
                goto exit_init_fw_cb;
        }
        status = QLA_SUCCESS;

exit_init_fw_cb:
        dma_free_coherent(&ha->pdev->dev, sizeof(struct addr_ctrl_blk),
                                init_fw_cb, init_fw_cb_dma);
exit_init_fw_cb_no_free:
        return status;
}

/**
 * qla4xxx_get_dhcp_ip_address - gets HBA ip address via DHCP
 * @ha: Pointer to host adapter structure.
 **/
int qla4xxx_get_dhcp_ip_address(struct scsi_qla_host * ha)
{
        struct addr_ctrl_blk *init_fw_cb;
        dma_addr_t init_fw_cb_dma;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
                                        sizeof(struct addr_ctrl_blk),
                                        &init_fw_cb_dma, GFP_KERNEL);
        if (init_fw_cb == NULL) {
                printk("scsi%ld: %s: Unable to alloc init_cb\n", ha->host_no,
                       __func__);
                return QLA_ERROR;
        }

        /* Get Initialize Firmware Control Block. */
        memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
        if (qla4xxx_get_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma) !=
            QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: Failed to get init_fw_ctrl_blk\n",
                              ha->host_no, __func__));
                dma_free_coherent(&ha->pdev->dev,
                                  sizeof(struct addr_ctrl_blk),
                                  init_fw_cb, init_fw_cb_dma);
                return QLA_ERROR;
        }

        /* Save IP Address. */
        qla4xxx_update_local_ip(ha, init_fw_cb);
        dma_free_coherent(&ha->pdev->dev, sizeof(struct addr_ctrl_blk),
                                init_fw_cb, init_fw_cb_dma);

        return QLA_SUCCESS;
}

/**
 * qla4xxx_get_firmware_state - gets firmware state of HBA
 * @ha: Pointer to host adapter structure.
 **/
int qla4xxx_get_firmware_state(struct scsi_qla_host * ha)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        /* Get firmware version */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_GET_FW_STATE;

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 4, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: MBOX_CMD_GET_FW_STATE failed w/ "
                              "status %04X\n", ha->host_no, __func__,
                              mbox_sts[0]));
                return QLA_ERROR;
        }
        ha->firmware_state = mbox_sts[1];
        ha->board_id = mbox_sts[2];
        ha->addl_fw_state = mbox_sts[3];
        DEBUG2(printk("scsi%ld: %s firmware_state=0x%x\n",
                      ha->host_no, __func__, ha->firmware_state);)

        return QLA_SUCCESS;
}

/**
 * qla4xxx_get_firmware_status - retrieves firmware status
 * @ha: Pointer to host adapter structure.
 **/
int qla4xxx_get_firmware_status(struct scsi_qla_host * ha)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        /* Get firmware version */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_GET_FW_STATUS;

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 3, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: MBOX_CMD_GET_FW_STATUS failed w/ "
                              "status %04X\n", ha->host_no, __func__,
                              mbox_sts[0]));
                return QLA_ERROR;
        }

        /* High-water mark of IOCBs */
        ha->iocb_hiwat = mbox_sts[2];
        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: firmware IOCBs available = %d\n", __func__,
                          ha->iocb_hiwat));

        if (ha->iocb_hiwat > IOCB_HIWAT_CUSHION)
                ha->iocb_hiwat -= IOCB_HIWAT_CUSHION;

        /* Ideally, we should not enter this code, as the # of firmware
         * IOCBs is hard-coded in the firmware. We set a default
         * iocb_hiwat here just in case */
        if (ha->iocb_hiwat == 0) {
                ha->iocb_hiwat = REQUEST_QUEUE_DEPTH / 4;
                DEBUG2(ql4_printk(KERN_WARNING, ha,
                                  "%s: Setting IOCB's to = %d\n", __func__,
                                  ha->iocb_hiwat));
        }

        return QLA_SUCCESS;
}

/**
 * qla4xxx_get_fwddb_entry - retrieves firmware ddb entry
 * @ha: Pointer to host adapter structure.
 * @fw_ddb_index: Firmware's device database index
 * @fw_ddb_entry: Pointer to firmware's device database entry structure
 * @num_valid_ddb_entries: Pointer to number of valid ddb entries
 * @next_ddb_index: Pointer to next valid device database index
 * @fw_ddb_device_state: Pointer to device state
 **/
int qla4xxx_get_fwddb_entry(struct scsi_qla_host *ha,
                            uint16_t fw_ddb_index,
                            struct dev_db_entry *fw_ddb_entry,
                            dma_addr_t fw_ddb_entry_dma,
                            uint32_t *num_valid_ddb_entries,
                            uint32_t *next_ddb_index,
                            uint32_t *fw_ddb_device_state,
                            uint32_t *conn_err_detail,
                            uint16_t *tcp_source_port_num,
                            uint16_t *connection_id)
{
        int status = QLA_ERROR;
        uint16_t options;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        /* Make sure the device index is valid */
        if (fw_ddb_index >= MAX_DDB_ENTRIES) {
                DEBUG2(printk("scsi%ld: %s: ddb [%d] out of range.\n",
                              ha->host_no, __func__, fw_ddb_index));
                goto exit_get_fwddb;
        }
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));
        if (fw_ddb_entry)
                memset(fw_ddb_entry, 0, sizeof(struct dev_db_entry));

        mbox_cmd[0] = MBOX_CMD_GET_DATABASE_ENTRY;
        mbox_cmd[1] = (uint32_t) fw_ddb_index;
        mbox_cmd[2] = LSDW(fw_ddb_entry_dma);
        mbox_cmd[3] = MSDW(fw_ddb_entry_dma);
        mbox_cmd[4] = sizeof(struct dev_db_entry);

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 7, &mbox_cmd[0], &mbox_sts[0]) ==
            QLA_ERROR) {
                DEBUG2(printk("scsi%ld: %s: MBOX_CMD_GET_DATABASE_ENTRY failed"
                              " with status 0x%04X\n", ha->host_no, __func__,
                              mbox_sts[0]));
                goto exit_get_fwddb;
        }
        if (fw_ddb_index != mbox_sts[1]) {
                DEBUG2(printk("scsi%ld: %s: ddb mismatch [%d] != [%d].\n",
                              ha->host_no, __func__, fw_ddb_index,
                              mbox_sts[1]));
                goto exit_get_fwddb;
        }
        if (fw_ddb_entry) {
                options = le16_to_cpu(fw_ddb_entry->options);
                if (options & DDB_OPT_IPV6_DEVICE) {
                        ql4_printk(KERN_INFO, ha, "%s: DDB[%d] MB0 %04x Tot %d "
                                "Next %d State %04x ConnErr %08x %pI6 "
                                ":%04d \"%s\"\n", __func__, fw_ddb_index,
                                mbox_sts[0], mbox_sts[2], mbox_sts[3],
                                mbox_sts[4], mbox_sts[5],
                                fw_ddb_entry->ip_addr,
                                le16_to_cpu(fw_ddb_entry->port),
                                fw_ddb_entry->iscsi_name);
                } else {
                        ql4_printk(KERN_INFO, ha, "%s: DDB[%d] MB0 %04x Tot %d "
                                "Next %d State %04x ConnErr %08x %pI4 "
                                ":%04d \"%s\"\n", __func__, fw_ddb_index,
                                mbox_sts[0], mbox_sts[2], mbox_sts[3],
                                mbox_sts[4], mbox_sts[5],
                                fw_ddb_entry->ip_addr,
                                le16_to_cpu(fw_ddb_entry->port),
                                fw_ddb_entry->iscsi_name);
                }
        }
        if (num_valid_ddb_entries)
                *num_valid_ddb_entries = mbox_sts[2];
        if (next_ddb_index)
                *next_ddb_index = mbox_sts[3];
        if (fw_ddb_device_state)
                *fw_ddb_device_state = mbox_sts[4];

        /*
         * RA: This mailbox has been changed to pass connection error and
         * details.  Its true for ISP4010 as per Version E - Not sure when it
         * was changed.  Get the time2wait from the fw_dd_entry field :
         * default_time2wait which we call it as minTime2Wait DEV_DB_ENTRY
         * struct.
         */
        if (conn_err_detail)
                *conn_err_detail = mbox_sts[5];
        if (tcp_source_port_num)
                *tcp_source_port_num = (uint16_t) (mbox_sts[6] >> 16);
        if (connection_id)
                *connection_id = (uint16_t) mbox_sts[6] & 0x00FF;
        status = QLA_SUCCESS;

exit_get_fwddb:
        return status;
}

int qla4xxx_conn_open(struct scsi_qla_host *ha, uint16_t fw_ddb_index)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_CONN_OPEN;
        mbox_cmd[1] = fw_ddb_index;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 2, &mbox_cmd[0],
                                         &mbox_sts[0]);
        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: status = %d mbx0 = 0x%x mbx1 = 0x%x\n",
                          __func__, status, mbox_sts[0], mbox_sts[1]));
        return status;
}

/**
 * qla4xxx_set_fwddb_entry - sets a ddb entry.
 * @ha: Pointer to host adapter structure.
 * @fw_ddb_index: Firmware's device database index
 * @fw_ddb_entry_dma: dma address of ddb entry
 * @mbx_sts: mailbox 0 to be returned or NULL
 *
 * This routine initializes or updates the adapter's device database
 * entry for the specified device.
 **/
int qla4xxx_set_ddb_entry(struct scsi_qla_host * ha, uint16_t fw_ddb_index,
                          dma_addr_t fw_ddb_entry_dma, uint32_t *mbx_sts)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status;

        /* Do not wait for completion. The firmware will send us an
         * ASTS_DATABASE_CHANGED (0x8014) to notify us of the login status.
         */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_SET_DATABASE_ENTRY;
        mbox_cmd[1] = (uint32_t) fw_ddb_index;
        mbox_cmd[2] = LSDW(fw_ddb_entry_dma);
        mbox_cmd[3] = MSDW(fw_ddb_entry_dma);
        mbox_cmd[4] = sizeof(struct dev_db_entry);

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (mbx_sts)
                *mbx_sts = mbox_sts[0];
        DEBUG2(printk("scsi%ld: %s: status=%d mbx0=0x%x mbx4=0x%x\n",
            ha->host_no, __func__, status, mbox_sts[0], mbox_sts[4]);)

        return status;
}

int qla4xxx_session_logout_ddb(struct scsi_qla_host *ha,
                               struct ddb_entry *ddb_entry, int options)
{
        int status;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_CONN_CLOSE_SESS_LOGOUT;
        mbox_cmd[1] = ddb_entry->fw_ddb_index;
        mbox_cmd[3] = options;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 2, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_INFO, ha,
                                  "%s: MBOX_CMD_CONN_CLOSE_SESS_LOGOUT "
                                  "failed sts %04X %04X", __func__,
                                  mbox_sts[0], mbox_sts[1]));
        }

        return status;
}

/**
 * qla4xxx_get_crash_record - retrieves crash record.
 * @ha: Pointer to host adapter structure.
 *
 * This routine retrieves a crash record from the QLA4010 after an 8002h aen.
 **/
void qla4xxx_get_crash_record(struct scsi_qla_host * ha)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        struct crash_record *crash_record = NULL;
        dma_addr_t crash_record_dma = 0;
        uint32_t crash_record_size = 0;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_cmd));

        /* Get size of crash record. */
        mbox_cmd[0] = MBOX_CMD_GET_CRASH_RECORD;

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: ERROR: Unable to retrieve size!\n",
                              ha->host_no, __func__));
                goto exit_get_crash_record;
        }
        crash_record_size = mbox_sts[4];
        if (crash_record_size == 0) {
                DEBUG2(printk("scsi%ld: %s: ERROR: Crash record size is 0!\n",
                              ha->host_no, __func__));
                goto exit_get_crash_record;
        }

        /* Alloc Memory for Crash Record. */
        crash_record = dma_alloc_coherent(&ha->pdev->dev, crash_record_size,
                                          &crash_record_dma, GFP_KERNEL);
        if (crash_record == NULL)
                goto exit_get_crash_record;

        /* Get Crash Record. */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_cmd));

        mbox_cmd[0] = MBOX_CMD_GET_CRASH_RECORD;
        mbox_cmd[2] = LSDW(crash_record_dma);
        mbox_cmd[3] = MSDW(crash_record_dma);
        mbox_cmd[4] = crash_record_size;

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS)
                goto exit_get_crash_record;

        /* Dump Crash Record. */

exit_get_crash_record:
        if (crash_record)
                dma_free_coherent(&ha->pdev->dev, crash_record_size,
                                  crash_record, crash_record_dma);
}

/**
 * qla4xxx_get_conn_event_log - retrieves connection event log
 * @ha: Pointer to host adapter structure.
 **/
void qla4xxx_get_conn_event_log(struct scsi_qla_host * ha)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        struct conn_event_log_entry *event_log = NULL;
        dma_addr_t event_log_dma = 0;
        uint32_t event_log_size = 0;
        uint32_t num_valid_entries;
        uint32_t      oldest_entry = 0;
        uint32_t        max_event_log_entries;
        uint8_t         i;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_cmd));

        /* Get size of crash record. */
        mbox_cmd[0] = MBOX_CMD_GET_CONN_EVENT_LOG;

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS)
                goto exit_get_event_log;

        event_log_size = mbox_sts[4];
        if (event_log_size == 0)
                goto exit_get_event_log;

        /* Alloc Memory for Crash Record. */

        event_log = dma_alloc_coherent(&ha->pdev->dev, event_log_size,
                                       &event_log_dma, GFP_KERNEL);
        if (event_log == NULL)
                goto exit_get_event_log;

        /* Get Crash Record. */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_cmd));

        mbox_cmd[0] = MBOX_CMD_GET_CONN_EVENT_LOG;
        mbox_cmd[2] = LSDW(event_log_dma);
        mbox_cmd[3] = MSDW(event_log_dma);

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: ERROR: Unable to retrieve event "
                              "log!\n", ha->host_no, __func__));
                goto exit_get_event_log;
        }

        /* Dump Event Log. */
        num_valid_entries = mbox_sts[1];

        max_event_log_entries = event_log_size /
                sizeof(struct conn_event_log_entry);

        if (num_valid_entries > max_event_log_entries)
                oldest_entry = num_valid_entries % max_event_log_entries;

        DEBUG3(printk("scsi%ld: Connection Event Log Dump (%d entries):\n",
                      ha->host_no, num_valid_entries));

        if (ql4xextended_error_logging == 3) {
                if (oldest_entry == 0) {
                        /* Circular Buffer has not wrapped around */
                        for (i=0; i < num_valid_entries; i++) {
                                qla4xxx_dump_buffer((uint8_t *)event_log+
                                                    (i*sizeof(*event_log)),
                                                    sizeof(*event_log));
                        }
                }
                else {
                        /* Circular Buffer has wrapped around -
                         * display accordingly*/
                        for (i=oldest_entry; i < max_event_log_entries; i++) {
                                qla4xxx_dump_buffer((uint8_t *)event_log+
                                                    (i*sizeof(*event_log)),
                                                    sizeof(*event_log));
                        }
                        for (i=0; i < oldest_entry; i++) {
                                qla4xxx_dump_buffer((uint8_t *)event_log+
                                                    (i*sizeof(*event_log)),
                                                    sizeof(*event_log));
                        }
                }
        }

exit_get_event_log:
        if (event_log)
                dma_free_coherent(&ha->pdev->dev, event_log_size, event_log,
                                  event_log_dma);
}

/**
 * qla4xxx_abort_task - issues Abort Task
 * @ha: Pointer to host adapter structure.
 * @srb: Pointer to srb entry
 *
 * This routine performs a LUN RESET on the specified target/lun.
 * The caller must ensure that the ddb_entry and lun_entry pointers
 * are valid before calling this routine.
 **/
int qla4xxx_abort_task(struct scsi_qla_host *ha, struct srb *srb)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        struct scsi_cmnd *cmd = srb->cmd;
        int status = QLA_SUCCESS;
        unsigned long flags = 0;
        uint32_t index;

        /*
         * Send abort task command to ISP, so that the ISP will return
         * request with ABORT status
         */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        spin_lock_irqsave(&ha->hardware_lock, flags);
        index = (unsigned long)(unsigned char *)cmd->host_scribble;
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        /* Firmware already posted completion on response queue */
        if (index == MAX_SRBS)
                return status;

        mbox_cmd[0] = MBOX_CMD_ABORT_TASK;
        mbox_cmd[1] = srb->ddb->fw_ddb_index;
        mbox_cmd[2] = index;
        /* Immediate Command Enable */
        mbox_cmd[5] = 0x01;

        qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0],
            &mbox_sts[0]);
        if (mbox_sts[0] != MBOX_STS_COMMAND_COMPLETE) {
                status = QLA_ERROR;

                DEBUG2(printk(KERN_WARNING "scsi%ld:%d:%d: abort task FAILED: "
                    "mbx0=%04X, mb1=%04X, mb2=%04X, mb3=%04X, mb4=%04X\n",
                    ha->host_no, cmd->device->id, cmd->device->lun, mbox_sts[0],
                    mbox_sts[1], mbox_sts[2], mbox_sts[3], mbox_sts[4]));
        }

        return status;
}

/**
 * qla4xxx_reset_lun - issues LUN Reset
 * @ha: Pointer to host adapter structure.
 * @ddb_entry: Pointer to device database entry
 * @lun: lun number
 *
 * This routine performs a LUN RESET on the specified target/lun.
 * The caller must ensure that the ddb_entry and lun_entry pointers
 * are valid before calling this routine.
 **/
int qla4xxx_reset_lun(struct scsi_qla_host * ha, struct ddb_entry * ddb_entry,
                      int lun)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        uint32_t scsi_lun[2];
        int status = QLA_SUCCESS;

        DEBUG2(printk("scsi%ld:%d:%d: lun reset issued\n", ha->host_no,
                      ddb_entry->fw_ddb_index, lun));

        /*
         * Send lun reset command to ISP, so that the ISP will return all
         * outstanding requests with RESET status
         */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));
        int_to_scsilun(lun, (struct scsi_lun *) scsi_lun);

        mbox_cmd[0] = MBOX_CMD_LUN_RESET;
        mbox_cmd[1] = ddb_entry->fw_ddb_index;
        /* FW expects LUN bytes 0-3 in Incoming Mailbox 2
         * (LUN byte 0 is LSByte, byte 3 is MSByte) */
        mbox_cmd[2] = cpu_to_le32(scsi_lun[0]);
        /* FW expects LUN bytes 4-7 in Incoming Mailbox 3
         * (LUN byte 4 is LSByte, byte 7 is MSByte) */
        mbox_cmd[3] = cpu_to_le32(scsi_lun[1]);
        mbox_cmd[5] = 0x01;     /* Immediate Command Enable */

        qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]);
        if (mbox_sts[0] != MBOX_STS_COMMAND_COMPLETE &&
            mbox_sts[0] != MBOX_STS_COMMAND_ERROR)
                status = QLA_ERROR;

        return status;
}

/**
 * qla4xxx_reset_target - issues target Reset
 * @ha: Pointer to host adapter structure.
 * @db_entry: Pointer to device database entry
 * @un_entry: Pointer to lun entry structure
 *
 * This routine performs a TARGET RESET on the specified target.
 * The caller must ensure that the ddb_entry pointers
 * are valid before calling this routine.
 **/
int qla4xxx_reset_target(struct scsi_qla_host *ha,
                         struct ddb_entry *ddb_entry)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_SUCCESS;

        DEBUG2(printk("scsi%ld:%d: target reset issued\n", ha->host_no,
                      ddb_entry->fw_ddb_index));

        /*
         * Send target reset command to ISP, so that the ISP will return all
         * outstanding requests with RESET status
         */
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_TARGET_WARM_RESET;
        mbox_cmd[1] = ddb_entry->fw_ddb_index;
        mbox_cmd[5] = 0x01;     /* Immediate Command Enable */

        qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0],
                                &mbox_sts[0]);
        if (mbox_sts[0] != MBOX_STS_COMMAND_COMPLETE &&
            mbox_sts[0] != MBOX_STS_COMMAND_ERROR)
                status = QLA_ERROR;

        return status;
}

int qla4xxx_get_flash(struct scsi_qla_host * ha, dma_addr_t dma_addr,
                      uint32_t offset, uint32_t len)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_READ_FLASH;
        mbox_cmd[1] = LSDW(dma_addr);
        mbox_cmd[2] = MSDW(dma_addr);
        mbox_cmd[3] = offset;
        mbox_cmd[4] = len;

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 2, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: MBOX_CMD_READ_FLASH, failed w/ "
                    "status %04X %04X, offset %08x, len %08x\n", ha->host_no,
                    __func__, mbox_sts[0], mbox_sts[1], offset, len));
                return QLA_ERROR;
        }
        return QLA_SUCCESS;
}

/**
 * qla4xxx_about_firmware - gets FW, iscsi draft and boot loader version
 * @ha: Pointer to host adapter structure.
 *
 * Retrieves the FW version, iSCSI draft version & bootloader version of HBA.
 * Mailboxes 2 & 3 may hold an address for data. Make sure that we write 0 to
 * those mailboxes, if unused.
 **/
int qla4xxx_about_firmware(struct scsi_qla_host *ha)
{
        struct about_fw_info *about_fw = NULL;
        dma_addr_t about_fw_dma;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_ERROR;

        about_fw = dma_alloc_coherent(&ha->pdev->dev,
                                      sizeof(struct about_fw_info),
                                      &about_fw_dma, GFP_KERNEL);
        if (!about_fw) {
                DEBUG2(ql4_printk(KERN_ERR, ha, "%s: Unable to alloc memory "
                                  "for about_fw\n", __func__));
                return status;
        }

        memset(about_fw, 0, sizeof(struct about_fw_info));
        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_ABOUT_FW;
        mbox_cmd[2] = LSDW(about_fw_dma);
        mbox_cmd[3] = MSDW(about_fw_dma);
        mbox_cmd[4] = sizeof(struct about_fw_info);

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, MBOX_REG_COUNT,
                                         &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: MBOX_CMD_ABOUT_FW "
                                  "failed w/ status %04X\n", __func__,
                                  mbox_sts[0]));
                goto exit_about_fw;
        }

        /* Save version information. */
        ha->firmware_version[0] = le16_to_cpu(about_fw->fw_major);
        ha->firmware_version[1] = le16_to_cpu(about_fw->fw_minor);
        ha->patch_number = le16_to_cpu(about_fw->fw_patch);
        ha->build_number = le16_to_cpu(about_fw->fw_build);
        ha->iscsi_major = le16_to_cpu(about_fw->iscsi_major);
        ha->iscsi_minor = le16_to_cpu(about_fw->iscsi_minor);
        ha->bootload_major = le16_to_cpu(about_fw->bootload_major);
        ha->bootload_minor = le16_to_cpu(about_fw->bootload_minor);
        ha->bootload_patch = le16_to_cpu(about_fw->bootload_patch);
        ha->bootload_build = le16_to_cpu(about_fw->bootload_build);
        status = QLA_SUCCESS;

exit_about_fw:
        dma_free_coherent(&ha->pdev->dev, sizeof(struct about_fw_info),
                          about_fw, about_fw_dma);
        return status;
}

int qla4xxx_get_default_ddb(struct scsi_qla_host *ha, uint32_t options,
                            dma_addr_t dma_addr)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_GET_DATABASE_ENTRY_DEFAULTS;
        mbox_cmd[1] = options;
        mbox_cmd[2] = LSDW(dma_addr);
        mbox_cmd[3] = MSDW(dma_addr);

        if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]) !=
            QLA_SUCCESS) {
                DEBUG2(printk("scsi%ld: %s: failed status %04X\n",
                     ha->host_no, __func__, mbox_sts[0]));
                return QLA_ERROR;
        }
        return QLA_SUCCESS;
}

int qla4xxx_req_ddb_entry(struct scsi_qla_host *ha, uint32_t ddb_index,
                          uint32_t *mbx_sts)
{
        int status;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_REQUEST_DATABASE_ENTRY;
        mbox_cmd[1] = ddb_index;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_ERR, ha, "%s: failed status %04X\n",
                                   __func__, mbox_sts[0]));
        }

        *mbx_sts = mbox_sts[0];
        return status;
}

int qla4xxx_clear_ddb_entry(struct scsi_qla_host *ha, uint32_t ddb_index)
{
        int status;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_CLEAR_DATABASE_ENTRY;
        mbox_cmd[1] = ddb_index;

        status = qla4xxx_mailbox_command(ha, 2, 1, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_ERR, ha, "%s: failed status %04X\n",
                                   __func__, mbox_sts[0]));
        }

        return status;
}

int qla4xxx_set_flash(struct scsi_qla_host *ha, dma_addr_t dma_addr,
                      uint32_t offset, uint32_t length, uint32_t options)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_SUCCESS;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_WRITE_FLASH;
        mbox_cmd[1] = LSDW(dma_addr);
        mbox_cmd[2] = MSDW(dma_addr);
        mbox_cmd[3] = offset;
        mbox_cmd[4] = length;
        mbox_cmd[5] = options;

        status = qla4xxx_mailbox_command(ha, 6, 2, &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: MBOX_CMD_WRITE_FLASH "
                                  "failed w/ status %04X, mbx1 %04X\n",
                                  __func__, mbox_sts[0], mbox_sts[1]));
        }
        return status;
}

int qla4xxx_bootdb_by_index(struct scsi_qla_host *ha,
                            struct dev_db_entry *fw_ddb_entry,
                            dma_addr_t fw_ddb_entry_dma, uint16_t ddb_index)
{
        uint32_t dev_db_start_offset = FLASH_OFFSET_DB_INFO;
        uint32_t dev_db_end_offset;
        int status = QLA_ERROR;

        memset(fw_ddb_entry, 0, sizeof(*fw_ddb_entry));

        dev_db_start_offset += (ddb_index * sizeof(*fw_ddb_entry));
        dev_db_end_offset = FLASH_OFFSET_DB_END;

        if (dev_db_start_offset > dev_db_end_offset) {
                DEBUG2(ql4_printk(KERN_ERR, ha,
                                  "%s:Invalid DDB index %d", __func__,
                                  ddb_index));
                goto exit_bootdb_failed;
        }

        if (qla4xxx_get_flash(ha, fw_ddb_entry_dma, dev_db_start_offset,
                              sizeof(*fw_ddb_entry)) != QLA_SUCCESS) {
                ql4_printk(KERN_ERR, ha, "scsi%ld: %s: Get Flash"
                           "failed\n", ha->host_no, __func__);
                goto exit_bootdb_failed;
        }

        if (fw_ddb_entry->cookie == DDB_VALID_COOKIE)
                status = QLA_SUCCESS;

exit_bootdb_failed:
        return status;
}

int qla4xxx_flashdb_by_index(struct scsi_qla_host *ha,
                             struct dev_db_entry *fw_ddb_entry,
                             dma_addr_t fw_ddb_entry_dma, uint16_t ddb_index)
{
        uint32_t dev_db_start_offset;
        uint32_t dev_db_end_offset;
        int status = QLA_ERROR;

        memset(fw_ddb_entry, 0, sizeof(*fw_ddb_entry));

        if (is_qla40XX(ha)) {
                dev_db_start_offset = FLASH_OFFSET_DB_INFO;
                dev_db_end_offset = FLASH_OFFSET_DB_END;
        } else {
                dev_db_start_offset = FLASH_RAW_ACCESS_ADDR +
                                      (ha->hw.flt_region_ddb << 2);
                /* flt_ddb_size is DDB table size for both ports
                 * so divide it by 2 to calculate the offset for second port
                 */
                if (ha->port_num == 1)
                        dev_db_start_offset += (ha->hw.flt_ddb_size / 2);

                dev_db_end_offset = dev_db_start_offset +
                                    (ha->hw.flt_ddb_size / 2);
        }

        dev_db_start_offset += (ddb_index * sizeof(*fw_ddb_entry));

        if (dev_db_start_offset > dev_db_end_offset) {
                DEBUG2(ql4_printk(KERN_ERR, ha,
                                  "%s:Invalid DDB index %d", __func__,
                                  ddb_index));
                goto exit_fdb_failed;
        }

        if (qla4xxx_get_flash(ha, fw_ddb_entry_dma, dev_db_start_offset,
                              sizeof(*fw_ddb_entry)) != QLA_SUCCESS) {
                ql4_printk(KERN_ERR, ha, "scsi%ld: %s: Get Flash failed\n",
                           ha->host_no, __func__);
                goto exit_fdb_failed;
        }

        if (fw_ddb_entry->cookie == DDB_VALID_COOKIE)
                status = QLA_SUCCESS;

exit_fdb_failed:
        return status;
}

int qla4xxx_get_chap(struct scsi_qla_host *ha, char *username, char *password,
                     uint16_t idx)
{
        int ret = 0;
        int rval = QLA_ERROR;
        uint32_t offset = 0, chap_size;
        struct ql4_chap_table *chap_table;
        dma_addr_t chap_dma;

        chap_table = dma_pool_alloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
        if (chap_table == NULL)
                return -ENOMEM;

        chap_size = sizeof(struct ql4_chap_table);
        memset(chap_table, 0, chap_size);

        if (is_qla40XX(ha))
                offset = FLASH_CHAP_OFFSET | (idx * chap_size);
        else {
                offset = FLASH_RAW_ACCESS_ADDR + (ha->hw.flt_region_chap << 2);
                /* flt_chap_size is CHAP table size for both ports
                 * so divide it by 2 to calculate the offset for second port
                 */
                if (ha->port_num == 1)
                        offset += (ha->hw.flt_chap_size / 2);
                offset += (idx * chap_size);
        }

        rval = qla4xxx_get_flash(ha, chap_dma, offset, chap_size);
        if (rval != QLA_SUCCESS) {
                ret = -EINVAL;
                goto exit_get_chap;
        }

        DEBUG2(ql4_printk(KERN_INFO, ha, "Chap Cookie: x%x\n",
                __le16_to_cpu(chap_table->cookie)));

        if (__le16_to_cpu(chap_table->cookie) != CHAP_VALID_COOKIE) {
                ql4_printk(KERN_ERR, ha, "No valid chap entry found\n");
                goto exit_get_chap;
        }

        strncpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
        strncpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
        chap_table->cookie = __constant_cpu_to_le16(CHAP_VALID_COOKIE);

exit_get_chap:
        dma_pool_free(ha->chap_dma_pool, chap_table, chap_dma);
        return ret;
}

static int qla4xxx_set_chap(struct scsi_qla_host *ha, char *username,
                            char *password, uint16_t idx, int bidi)
{
        int ret = 0;
        int rval = QLA_ERROR;
        uint32_t offset = 0;
        struct ql4_chap_table *chap_table;
        dma_addr_t chap_dma;

        chap_table = dma_pool_alloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
        if (chap_table == NULL) {
                ret =  -ENOMEM;
                goto exit_set_chap;
        }

        memset(chap_table, 0, sizeof(struct ql4_chap_table));
        if (bidi)
                chap_table->flags |= BIT_6; /* peer */
        else
                chap_table->flags |= BIT_7; /* local */
        chap_table->secret_len = strlen(password);
        strncpy(chap_table->secret, password, MAX_CHAP_SECRET_LEN);
        strncpy(chap_table->name, username, MAX_CHAP_NAME_LEN);
        chap_table->cookie = __constant_cpu_to_le16(CHAP_VALID_COOKIE);
        offset = FLASH_CHAP_OFFSET | (idx * sizeof(struct ql4_chap_table));
        rval = qla4xxx_set_flash(ha, chap_dma, offset,
                                sizeof(struct ql4_chap_table),
                                FLASH_OPT_RMW_COMMIT);

        if (rval == QLA_SUCCESS && ha->chap_list) {
                /* Update ha chap_list cache */
                memcpy((struct ql4_chap_table *)ha->chap_list + idx,
                       chap_table, sizeof(struct ql4_chap_table));
        }
        dma_pool_free(ha->chap_dma_pool, chap_table, chap_dma);
        if (rval != QLA_SUCCESS)
                ret =  -EINVAL;

exit_set_chap:
        return ret;
}


int qla4xxx_get_uni_chap_at_index(struct scsi_qla_host *ha, char *username,
                                  char *password, uint16_t chap_index)
{
        int rval = QLA_ERROR;
        struct ql4_chap_table *chap_table = NULL;
        int max_chap_entries;

        if (!ha->chap_list) {
                ql4_printk(KERN_ERR, ha, "Do not have CHAP table cache\n");
                rval = QLA_ERROR;
                goto exit_uni_chap;
        }

        if (!username || !password) {
                ql4_printk(KERN_ERR, ha, "No memory for username & secret\n");
                rval = QLA_ERROR;
                goto exit_uni_chap;
        }

        if (is_qla80XX(ha))
                max_chap_entries = (ha->hw.flt_chap_size / 2) /
                                   sizeof(struct ql4_chap_table);
        else
                max_chap_entries = MAX_CHAP_ENTRIES_40XX;

        if (chap_index > max_chap_entries) {
                ql4_printk(KERN_ERR, ha, "Invalid Chap index\n");
                rval = QLA_ERROR;
                goto exit_uni_chap;
        }

        mutex_lock(&ha->chap_sem);
        chap_table = (struct ql4_chap_table *)ha->chap_list + chap_index;
        if (chap_table->cookie != __constant_cpu_to_le16(CHAP_VALID_COOKIE)) {
                rval = QLA_ERROR;
                goto exit_unlock_uni_chap;
        }

        if (!(chap_table->flags & BIT_6)) {
                ql4_printk(KERN_ERR, ha, "Unidirectional entry not set\n");
                rval = QLA_ERROR;
                goto exit_unlock_uni_chap;
        }

        strncpy(password, chap_table->secret, MAX_CHAP_SECRET_LEN);
        strncpy(username, chap_table->name, MAX_CHAP_NAME_LEN);

        rval = QLA_SUCCESS;

exit_unlock_uni_chap:
        mutex_unlock(&ha->chap_sem);
exit_uni_chap:
        return rval;
}

/**
 * qla4xxx_get_chap_index - Get chap index given username and secret
 * @ha: pointer to adapter structure
 * @username: CHAP username to be searched
 * @password: CHAP password to be searched
 * @bidi: Is this a BIDI CHAP
 * @chap_index: CHAP index to be returned
 *
 * Match the username and password in the chap_list, return the index if a
 * match is found. If a match is not found then add the entry in FLASH and
 * return the index at which entry is written in the FLASH.
 **/
int qla4xxx_get_chap_index(struct scsi_qla_host *ha, char *username,
                           char *password, int bidi, uint16_t *chap_index)
{
        int i, rval;
        int free_index = -1;
        int found_index = 0;
        int max_chap_entries = 0;
        struct ql4_chap_table *chap_table;

        if (is_qla80XX(ha))
                max_chap_entries = (ha->hw.flt_chap_size / 2) /
                                                sizeof(struct ql4_chap_table);
        else
                max_chap_entries = MAX_CHAP_ENTRIES_40XX;

        if (!ha->chap_list) {
                ql4_printk(KERN_ERR, ha, "Do not have CHAP table cache\n");
                return QLA_ERROR;
        }

        if (!username || !password) {
                ql4_printk(KERN_ERR, ha, "Do not have username and psw\n");
                return QLA_ERROR;
        }

        mutex_lock(&ha->chap_sem);
        for (i = 0; i < max_chap_entries; i++) {
                chap_table = (struct ql4_chap_table *)ha->chap_list + i;
                if (chap_table->cookie !=
                    __constant_cpu_to_le16(CHAP_VALID_COOKIE)) {
                        if (i > MAX_RESRV_CHAP_IDX && free_index == -1)
                                free_index = i;
                        continue;
                }
                if (bidi) {
                        if (chap_table->flags & BIT_7)
                                continue;
                } else {
                        if (chap_table->flags & BIT_6)
                                continue;
                }
                if (!strncmp(chap_table->secret, password,
                             MAX_CHAP_SECRET_LEN) &&
                    !strncmp(chap_table->name, username,
                             MAX_CHAP_NAME_LEN)) {
                        *chap_index = i;
                        found_index = 1;
                        break;
                }
        }

        /* If chap entry is not present and a free index is available then
         * write the entry in flash
         */
        if (!found_index && free_index != -1) {
                rval = qla4xxx_set_chap(ha, username, password,
                                        free_index, bidi);
                if (!rval) {
                        *chap_index = free_index;
                        found_index = 1;
                }
        }

        mutex_unlock(&ha->chap_sem);

        if (found_index)
                return QLA_SUCCESS;
        return QLA_ERROR;
}

int qla4xxx_conn_close_sess_logout(struct scsi_qla_host *ha,
                                   uint16_t fw_ddb_index,
                                   uint16_t connection_id,
                                   uint16_t option)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_SUCCESS;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_CONN_CLOSE_SESS_LOGOUT;
        mbox_cmd[1] = fw_ddb_index;
        mbox_cmd[2] = connection_id;
        mbox_cmd[3] = option;

        status = qla4xxx_mailbox_command(ha, 4, 2, &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: MBOX_CMD_CONN_CLOSE "
                                  "option %04x failed w/ status %04X %04X\n",
                                  __func__, option, mbox_sts[0], mbox_sts[1]));
        }
        return status;
}

int qla4xxx_disable_acb(struct scsi_qla_host *ha)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_SUCCESS;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_DISABLE_ACB;

        status = qla4xxx_mailbox_command(ha, 8, 5, &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: MBOX_CMD_DISABLE_ACB "
                                  "failed w/ status %04X %04X %04X", __func__,
                                  mbox_sts[0], mbox_sts[1], mbox_sts[2]));
        }
        return status;
}

int qla4xxx_get_acb(struct scsi_qla_host *ha, dma_addr_t acb_dma,
                    uint32_t acb_type, uint32_t len)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_SUCCESS;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_GET_ACB;
        mbox_cmd[1] = acb_type;
        mbox_cmd[2] = LSDW(acb_dma);
        mbox_cmd[3] = MSDW(acb_dma);
        mbox_cmd[4] = len;

        status = qla4xxx_mailbox_command(ha, 5, 5, &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: MBOX_CMD_GET_ACB "
                                  "failed w/ status %04X\n", __func__,
                                  mbox_sts[0]));
        }
        return status;
}

int qla4xxx_set_acb(struct scsi_qla_host *ha, uint32_t *mbox_cmd,
                    uint32_t *mbox_sts, dma_addr_t acb_dma)
{
        int status = QLA_SUCCESS;

        memset(mbox_cmd, 0, sizeof(mbox_cmd[0]) * MBOX_REG_COUNT);
        memset(mbox_sts, 0, sizeof(mbox_sts[0]) * MBOX_REG_COUNT);
        mbox_cmd[0] = MBOX_CMD_SET_ACB;
        mbox_cmd[1] = 0; /* Primary ACB */
        mbox_cmd[2] = LSDW(acb_dma);
        mbox_cmd[3] = MSDW(acb_dma);
        mbox_cmd[4] = sizeof(struct addr_ctrl_blk);

        status = qla4xxx_mailbox_command(ha, 5, 5, &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha,  "%s: MBOX_CMD_SET_ACB "
                                  "failed w/ status %04X\n", __func__,
                                  mbox_sts[0]));
        }
        return status;
}

int qla4xxx_set_param_ddbentry(struct scsi_qla_host *ha,
                               struct ddb_entry *ddb_entry,
                               struct iscsi_cls_conn *cls_conn,
                               uint32_t *mbx_sts)
{
        struct dev_db_entry *fw_ddb_entry;
        struct iscsi_conn *conn;
        struct iscsi_session *sess;
        struct qla_conn *qla_conn;
        struct sockaddr *dst_addr;
        dma_addr_t fw_ddb_entry_dma;
        int status = QLA_SUCCESS;
        int rval = 0;
        struct sockaddr_in *addr;
        struct sockaddr_in6 *addr6;
        char *ip;
        uint16_t iscsi_opts = 0;
        uint32_t options = 0;
        uint16_t idx, *ptid;

        fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
                                          &fw_ddb_entry_dma, GFP_KERNEL);
        if (!fw_ddb_entry) {
                DEBUG2(ql4_printk(KERN_ERR, ha,
                                  "%s: Unable to allocate dma buffer.\n",
                                  __func__));
                rval = -ENOMEM;
                goto exit_set_param_no_free;
        }

        conn = cls_conn->dd_data;
        qla_conn = conn->dd_data;
        sess = conn->session;
        dst_addr = (struct sockaddr *)&qla_conn->qla_ep->dst_addr;

        if (dst_addr->sa_family == AF_INET6)
                options |= IPV6_DEFAULT_DDB_ENTRY;

        status = qla4xxx_get_default_ddb(ha, options, fw_ddb_entry_dma);
        if (status == QLA_ERROR) {
                rval = -EINVAL;
                goto exit_set_param;
        }

        ptid = (uint16_t *)&fw_ddb_entry->isid[1];
        *ptid = cpu_to_le16((uint16_t)ddb_entry->sess->target_id);

        DEBUG2(ql4_printk(KERN_INFO, ha, "ISID [%02x%02x%02x%02x%02x%02x]\n",
                          fw_ddb_entry->isid[5], fw_ddb_entry->isid[4],
                          fw_ddb_entry->isid[3], fw_ddb_entry->isid[2],
                          fw_ddb_entry->isid[1], fw_ddb_entry->isid[0]));

        iscsi_opts = le16_to_cpu(fw_ddb_entry->iscsi_options);
        memset(fw_ddb_entry->iscsi_alias, 0, sizeof(fw_ddb_entry->iscsi_alias));

        memset(fw_ddb_entry->iscsi_name, 0, sizeof(fw_ddb_entry->iscsi_name));

        if (sess->targetname != NULL) {
                memcpy(fw_ddb_entry->iscsi_name, sess->targetname,
                       min(strlen(sess->targetname),
                       sizeof(fw_ddb_entry->iscsi_name)));
        }

        memset(fw_ddb_entry->ip_addr, 0, sizeof(fw_ddb_entry->ip_addr));
        memset(fw_ddb_entry->tgt_addr, 0, sizeof(fw_ddb_entry->tgt_addr));

        fw_ddb_entry->options =  DDB_OPT_TARGET | DDB_OPT_AUTO_SENDTGTS_DISABLE;

        if (dst_addr->sa_family == AF_INET) {
                addr = (struct sockaddr_in *)dst_addr;
                ip = (char *)&addr->sin_addr;
                memcpy(fw_ddb_entry->ip_addr, ip, IP_ADDR_LEN);
                fw_ddb_entry->port = cpu_to_le16(ntohs(addr->sin_port));
                DEBUG2(ql4_printk(KERN_INFO, ha,
                                  "%s: Destination Address [%pI4]: index [%d]\n",
                                   __func__, fw_ddb_entry->ip_addr,
                                  ddb_entry->fw_ddb_index));
        } else if (dst_addr->sa_family == AF_INET6) {
                addr6 = (struct sockaddr_in6 *)dst_addr;
                ip = (char *)&addr6->sin6_addr;
                memcpy(fw_ddb_entry->ip_addr, ip, IPv6_ADDR_LEN);
                fw_ddb_entry->port = cpu_to_le16(ntohs(addr6->sin6_port));
                fw_ddb_entry->options |= DDB_OPT_IPV6_DEVICE;
                DEBUG2(ql4_printk(KERN_INFO, ha,
                                  "%s: Destination Address [%pI6]: index [%d]\n",
                                   __func__, fw_ddb_entry->ip_addr,
                                  ddb_entry->fw_ddb_index));
        } else {
                ql4_printk(KERN_ERR, ha,
                           "%s: Failed to get IP Address\n",
                           __func__);
                rval = -EINVAL;
                goto exit_set_param;
        }

        /* CHAP */
        if (sess->username != NULL && sess->password != NULL) {
                if (strlen(sess->username) && strlen(sess->password)) {
                        iscsi_opts |= BIT_7;

                        rval = qla4xxx_get_chap_index(ha, sess->username,
                                                sess->password,
                                                LOCAL_CHAP, &idx);
                        if (rval)
                                goto exit_set_param;

                        fw_ddb_entry->chap_tbl_idx = cpu_to_le16(idx);
                }
        }

        if (sess->username_in != NULL && sess->password_in != NULL) {
                /* Check if BIDI CHAP */
                if (strlen(sess->username_in) && strlen(sess->password_in)) {
                        iscsi_opts |= BIT_4;

                        rval = qla4xxx_get_chap_index(ha, sess->username_in,
                                                      sess->password_in,
                                                      BIDI_CHAP, &idx);
                        if (rval)
                                goto exit_set_param;
                }
        }

        if (sess->initial_r2t_en)
                iscsi_opts |= BIT_10;

        if (sess->imm_data_en)
                iscsi_opts |= BIT_11;

        fw_ddb_entry->iscsi_options = cpu_to_le16(iscsi_opts);

        if (conn->max_recv_dlength)
                fw_ddb_entry->iscsi_max_rcv_data_seg_len =
                  __constant_cpu_to_le16((conn->max_recv_dlength / BYTE_UNITS));

        if (sess->max_r2t)
                fw_ddb_entry->iscsi_max_outsnd_r2t = cpu_to_le16(sess->max_r2t);

        if (sess->first_burst)
                fw_ddb_entry->iscsi_first_burst_len =
                       __constant_cpu_to_le16((sess->first_burst / BYTE_UNITS));

        if (sess->max_burst)
                fw_ddb_entry->iscsi_max_burst_len =
                        __constant_cpu_to_le16((sess->max_burst / BYTE_UNITS));

        if (sess->time2wait)
                fw_ddb_entry->iscsi_def_time2wait =
                        cpu_to_le16(sess->time2wait);

        if (sess->time2retain)
                fw_ddb_entry->iscsi_def_time2retain =
                        cpu_to_le16(sess->time2retain);

        status = qla4xxx_set_ddb_entry(ha, ddb_entry->fw_ddb_index,
                                       fw_ddb_entry_dma, mbx_sts);

        if (status != QLA_SUCCESS)
                rval = -EINVAL;
exit_set_param:
        dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
                          fw_ddb_entry, fw_ddb_entry_dma);
exit_set_param_no_free:
        return rval;
}

int qla4xxx_get_mgmt_data(struct scsi_qla_host *ha, uint16_t fw_ddb_index,
                          uint16_t stats_size, dma_addr_t stats_dma)
{
        int status = QLA_SUCCESS;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(mbox_cmd, 0, sizeof(mbox_cmd[0]) * MBOX_REG_COUNT);
        memset(mbox_sts, 0, sizeof(mbox_sts[0]) * MBOX_REG_COUNT);
        mbox_cmd[0] = MBOX_CMD_GET_MANAGEMENT_DATA;
        mbox_cmd[1] = fw_ddb_index;
        mbox_cmd[2] = LSDW(stats_dma);
        mbox_cmd[3] = MSDW(stats_dma);
        mbox_cmd[4] = stats_size;

        status = qla4xxx_mailbox_command(ha, 5, 1, &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha,
                                  "%s: MBOX_CMD_GET_MANAGEMENT_DATA "
                                  "failed w/ status %04X\n", __func__,
                                  mbox_sts[0]));
        }
        return status;
}

int qla4xxx_get_ip_state(struct scsi_qla_host *ha, uint32_t acb_idx,
                         uint32_t ip_idx, uint32_t *sts)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_SUCCESS;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));
        mbox_cmd[0] = MBOX_CMD_GET_IP_ADDR_STATE;
        mbox_cmd[1] = acb_idx;
        mbox_cmd[2] = ip_idx;

        status = qla4xxx_mailbox_command(ha, 3, 8, &mbox_cmd[0], &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_WARNING, ha,  "%s: "
                                  "MBOX_CMD_GET_IP_ADDR_STATE failed w/ "

                                  "status %04X\n", __func__, mbox_sts[0]));
        }
        memcpy(sts, mbox_sts, sizeof(mbox_sts));
        return status;
}

int qla4xxx_get_nvram(struct scsi_qla_host *ha, dma_addr_t nvram_dma,
                      uint32_t offset, uint32_t size)
{
        int status = QLA_SUCCESS;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_GET_NVRAM;
        mbox_cmd[1] = LSDW(nvram_dma);
        mbox_cmd[2] = MSDW(nvram_dma);
        mbox_cmd[3] = offset;
        mbox_cmd[4] = size;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
                                  "status %04X\n", ha->host_no, __func__,
                                  mbox_sts[0]));
        }
        return status;
}

int qla4xxx_set_nvram(struct scsi_qla_host *ha, dma_addr_t nvram_dma,
                      uint32_t offset, uint32_t size)
{
        int status = QLA_SUCCESS;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_SET_NVRAM;
        mbox_cmd[1] = LSDW(nvram_dma);
        mbox_cmd[2] = MSDW(nvram_dma);
        mbox_cmd[3] = offset;
        mbox_cmd[4] = size;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
                                  "status %04X\n", ha->host_no, __func__,
                                  mbox_sts[0]));
        }
        return status;
}

int qla4xxx_restore_factory_defaults(struct scsi_qla_host *ha,
                                     uint32_t region, uint32_t field0,
                                     uint32_t field1)
{
        int status = QLA_SUCCESS;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_RESTORE_FACTORY_DEFAULTS;
        mbox_cmd[3] = region;
        mbox_cmd[4] = field0;
        mbox_cmd[5] = field1;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 3, &mbox_cmd[0],
                                         &mbox_sts[0]);
        if (status != QLA_SUCCESS) {
                DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
                                  "status %04X\n", ha->host_no, __func__,
                                  mbox_sts[0]));
        }
        return status;
}

/**
 * qla4_8xxx_set_param - set driver version in firmware.
 * @ha: Pointer to host adapter structure.
 * @param: Parameter to set i.e driver version
 **/
int qla4_8xxx_set_param(struct scsi_qla_host *ha, int param)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        uint32_t status;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_SET_PARAM;
        if (param == SET_DRVR_VERSION) {
                mbox_cmd[1] = SET_DRVR_VERSION;
                strncpy((char *)&mbox_cmd[2], QLA4XXX_DRIVER_VERSION,
                        MAX_DRVR_VER_LEN);
        } else {
                ql4_printk(KERN_ERR, ha, "%s: invalid parameter 0x%x\n",
                           __func__, param);
                status = QLA_ERROR;
                goto exit_set_param;
        }

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 2, mbox_cmd,
                                         mbox_sts);
        if (status == QLA_ERROR)
                ql4_printk(KERN_ERR, ha, "%s: failed status %04X\n",
                           __func__, mbox_sts[0]);

exit_set_param:
        return status;
}

/**
 * qla4_83xx_post_idc_ack - post IDC ACK
 * @ha: Pointer to host adapter structure.
 *
 * Posts IDC ACK for IDC Request Notification AEN.
 **/
int qla4_83xx_post_idc_ack(struct scsi_qla_host *ha)
{
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status;

        memset(&mbox_cmd, 0, sizeof(mbox_cmd));
        memset(&mbox_sts, 0, sizeof(mbox_sts));

        mbox_cmd[0] = MBOX_CMD_IDC_ACK;
        mbox_cmd[1] = ha->idc_info.request_desc;
        mbox_cmd[2] = ha->idc_info.info1;
        mbox_cmd[3] = ha->idc_info.info2;
        mbox_cmd[4] = ha->idc_info.info3;

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, MBOX_REG_COUNT,
                                         mbox_cmd, mbox_sts);
        if (status == QLA_ERROR)
                ql4_printk(KERN_ERR, ha, "%s: failed status %04X\n", __func__,
                           mbox_sts[0]);
        else
               DEBUG2(ql4_printk(KERN_INFO, ha, "%s: IDC ACK posted\n",
                                 __func__));

        return status;
}