qlge_mpi.c

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#include "qlge.h"

int ql_unpause_mpi_risc(struct ql_adapter *qdev)
{
    u32 tmp;

    /* Un-pause the RISC */
    tmp = ql_read32(qdev, CSR);
    if (!(tmp & CSR_RP))
        return -EIO;

    ql_write32(qdev, CSR, CSR_CMD_CLR_PAUSE);
    return 0;
}

int ql_pause_mpi_risc(struct ql_adapter *qdev)
{
    u32 tmp;
    int count = UDELAY_COUNT;

    /* Pause the RISC */
    ql_write32(qdev, CSR, CSR_CMD_SET_PAUSE);
    do {
        tmp = ql_read32(qdev, CSR);
        if (tmp & CSR_RP)
            break;
        mdelay(UDELAY_DELAY);
        count--;
    } while (count);
    return (count == 0) ? -ETIMEDOUT : 0;
}

int ql_hard_reset_mpi_risc(struct ql_adapter *qdev)
{
    u32 tmp;
    int count = UDELAY_COUNT;

    /* Reset the RISC */
    ql_write32(qdev, CSR, CSR_CMD_SET_RST);
    do {
        tmp = ql_read32(qdev, CSR);
        if (tmp & CSR_RR) {
            ql_write32(qdev, CSR, CSR_CMD_CLR_RST);
            break;
        }
        mdelay(UDELAY_DELAY);
        count--;
    } while (count);
    return (count == 0) ? -ETIMEDOUT : 0;
}

int ql_read_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 *data)
{
    int status;
    /* wait for reg to come ready */
    status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
    if (status)
        goto exit;
    /* set up for reg read */
    ql_write32(qdev, PROC_ADDR, reg | PROC_ADDR_R);
    /* wait for reg to come ready */
    status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
    if (status)
        goto exit;
    /* get the data */
    *data = ql_read32(qdev, PROC_DATA);
exit:
    return status;
}

int ql_write_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 data)
{
    int status = 0;
    /* wait for reg to come ready */
    status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
    if (status)
        goto exit;
    /* write the data to the data reg */
    ql_write32(qdev, PROC_DATA, data);
    /* trigger the write */
    ql_write32(qdev, PROC_ADDR, reg);
    /* wait for reg to come ready */
    status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
    if (status)
        goto exit;
exit:
    return status;
}

int ql_soft_reset_mpi_risc(struct ql_adapter *qdev)
{
    int status;
    status = ql_write_mpi_reg(qdev, 0x00001010, 1);
    return status;
}

/* Determine if we are in charge of the firwmare. If
 * we are the lower of the 2 NIC pcie functions, or if
 * we are the higher function and the lower function
 * is not enabled.
 */
int ql_own_firmware(struct ql_adapter *qdev)
{
    u32 temp;

    /* If we are the lower of the 2 NIC functions
     * on the chip the we are responsible for
     * core dump and firmware reset after an error.
     */
    if (qdev->func < qdev->alt_func)
        return 1;

    /* If we are the higher of the 2 NIC functions
     * on the chip and the lower function is not
     * enabled, then we are responsible for
     * core dump and firmware reset after an error.
     */
    temp =  ql_read32(qdev, STS);
    if (!(temp & (1 << (8 + qdev->alt_func))))
        return 1;

    return 0;

}

static int ql_get_mb_sts(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int i, status;

    status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
    if (status)
        return -EBUSY;
    for (i = 0; i < mbcp->out_count; i++) {
        status =
            ql_read_mpi_reg(qdev, qdev->mailbox_out + i,
                     &mbcp->mbox_out[i]);
        if (status) {
            netif_err(qdev, drv, qdev->ndev, "Failed mailbox read.\n");
            break;
        }
    }
    ql_sem_unlock(qdev, SEM_PROC_REG_MASK); /* does flush too */
    return status;
}

/* Wait for a single mailbox command to complete.
 * Returns zero on success.
 */
static int ql_wait_mbx_cmd_cmplt(struct ql_adapter *qdev)
{
    int count = 100;
    u32 value;

    do {
        value = ql_read32(qdev, STS);
        if (value & STS_PI)
            return 0;
        mdelay(UDELAY_DELAY); /* 100ms */
    } while (--count);
    return -ETIMEDOUT;
}

/* Execute a single mailbox command.
 * Caller must hold PROC_ADDR semaphore.
 */
static int ql_exec_mb_cmd(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int i, status;

    /*
     * Make sure there's nothing pending.
     * This shouldn't happen.
     */
    if (ql_read32(qdev, CSR) & CSR_HRI)
        return -EIO;

    status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
    if (status)
        return status;

    /*
     * Fill the outbound mailboxes.
     */
    for (i = 0; i < mbcp->in_count; i++) {
        status = ql_write_mpi_reg(qdev, qdev->mailbox_in + i,
                        mbcp->mbox_in[i]);
        if (status)
            goto end;
    }
    /*
     * Wake up the MPI firmware.
     */
    ql_write32(qdev, CSR, CSR_CMD_SET_H2R_INT);
end:
    ql_sem_unlock(qdev, SEM_PROC_REG_MASK);
    return status;
}

/* We are being asked by firmware to accept
 * a change to the port.  This is only
 * a change to max frame sizes (Tx/Rx), pause
 * parameters, or loopback mode. We wake up a worker
 * to handler processing this since a mailbox command
 * will need to be sent to ACK the request.
 */
static int ql_idc_req_aen(struct ql_adapter *qdev)
{
    int status;
    struct mbox_params *mbcp = &qdev->idc_mbc;

    netif_err(qdev, drv, qdev->ndev, "Enter!\n");
    /* Get the status data and start up a thread to
     * handle the request.
     */
    mbcp = &qdev->idc_mbc;
    mbcp->out_count = 4;
    status = ql_get_mb_sts(qdev, mbcp);
    if (status) {
        netif_err(qdev, drv, qdev->ndev,
              "Could not read MPI, resetting ASIC!\n");
        ql_queue_asic_error(qdev);
    } else  {
        /* Begin polled mode early so
         * we don't get another interrupt
         * when we leave mpi_worker.
         */
        ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
        queue_delayed_work(qdev->workqueue, &qdev->mpi_idc_work, 0);
    }
    return status;
}

/* Process an inter-device event completion.
 * If good, signal the caller's completion.
 */
static int ql_idc_cmplt_aen(struct ql_adapter *qdev)
{
    int status;
    struct mbox_params *mbcp = &qdev->idc_mbc;
    mbcp->out_count = 4;
    status = ql_get_mb_sts(qdev, mbcp);
    if (status) {
        netif_err(qdev, drv, qdev->ndev,
              "Could not read MPI, resetting RISC!\n");
        ql_queue_fw_error(qdev);
    } else
        /* Wake up the sleeping mpi_idc_work thread that is
         * waiting for this event.
         */
        complete(&qdev->ide_completion);

    return status;
}

static void ql_link_up(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;
    mbcp->out_count = 2;

    status = ql_get_mb_sts(qdev, mbcp);
    if (status) {
        netif_err(qdev, drv, qdev->ndev,
              "%s: Could not get mailbox status.\n", __func__);
        return;
    }

    qdev->link_status = mbcp->mbox_out[1];
    netif_err(qdev, drv, qdev->ndev, "Link Up.\n");

    /* If we're coming back from an IDC event
     * then set up the CAM and frame routing.
     */
    if (test_bit(QL_CAM_RT_SET, &qdev->flags)) {
        status = ql_cam_route_initialize(qdev);
        if (status) {
            netif_err(qdev, ifup, qdev->ndev,
                  "Failed to init CAM/Routing tables.\n");
            return;
        } else
            clear_bit(QL_CAM_RT_SET, &qdev->flags);
    }

    /* Queue up a worker to check the frame
     * size information, and fix it if it's not
     * to our liking.
     */
    if (!test_bit(QL_PORT_CFG, &qdev->flags)) {
        netif_err(qdev, drv, qdev->ndev, "Queue Port Config Worker!\n");
        set_bit(QL_PORT_CFG, &qdev->flags);
        /* Begin polled mode early so
         * we don't get another interrupt
         * when we leave mpi_worker dpc.
         */
        ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
        queue_delayed_work(qdev->workqueue,
                &qdev->mpi_port_cfg_work, 0);
    }

    ql_link_on(qdev);
}

static void ql_link_down(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;

    mbcp->out_count = 3;

    status = ql_get_mb_sts(qdev, mbcp);
    if (status)
        netif_err(qdev, drv, qdev->ndev, "Link down AEN broken!\n");

    ql_link_off(qdev);
}

static int ql_sfp_in(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;

    mbcp->out_count = 5;

    status = ql_get_mb_sts(qdev, mbcp);
    if (status)
        netif_err(qdev, drv, qdev->ndev, "SFP in AEN broken!\n");
    else
        netif_err(qdev, drv, qdev->ndev, "SFP insertion detected.\n");

    return status;
}

static int ql_sfp_out(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;

    mbcp->out_count = 1;

    status = ql_get_mb_sts(qdev, mbcp);
    if (status)
        netif_err(qdev, drv, qdev->ndev, "SFP out AEN broken!\n");
    else
        netif_err(qdev, drv, qdev->ndev, "SFP removal detected.\n");

    return status;
}

static int ql_aen_lost(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;

    mbcp->out_count = 6;

    status = ql_get_mb_sts(qdev, mbcp);
    if (status)
        netif_err(qdev, drv, qdev->ndev, "Lost AEN broken!\n");
    else {
        int i;
        netif_err(qdev, drv, qdev->ndev, "Lost AEN detected.\n");
        for (i = 0; i < mbcp->out_count; i++)
            netif_err(qdev, drv, qdev->ndev, "mbox_out[%d] = 0x%.08x.\n",
                  i, mbcp->mbox_out[i]);

    }

    return status;
}

static void ql_init_fw_done(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;

    mbcp->out_count = 2;

    status = ql_get_mb_sts(qdev, mbcp);
    if (status) {
        netif_err(qdev, drv, qdev->ndev, "Firmware did not initialize!\n");
    } else {
        netif_err(qdev, drv, qdev->ndev, "Firmware Revision  = 0x%.08x.\n",
              mbcp->mbox_out[1]);
        qdev->fw_rev_id = mbcp->mbox_out[1];
        status = ql_cam_route_initialize(qdev);
        if (status)
            netif_err(qdev, ifup, qdev->ndev,
                  "Failed to init CAM/Routing tables.\n");
    }
}

/* Process an async event and clear it unless it's an
 * error condition.
 *  This can get called iteratively from the mpi_work thread
 *  when events arrive via an interrupt.
 *  It also gets called when a mailbox command is polling for
 *  it's completion. */
static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;
    int orig_count = mbcp->out_count;

    /* Just get mailbox zero for now. */
    mbcp->out_count = 1;
    status = ql_get_mb_sts(qdev, mbcp);
    if (status) {
        netif_err(qdev, drv, qdev->ndev,
              "Could not read MPI, resetting ASIC!\n");
        ql_queue_asic_error(qdev);
        goto end;
    }

    switch (mbcp->mbox_out[0]) {

    /* This case is only active when we arrive here
     * as a result of issuing a mailbox command to
     * the firmware.
     */
    case MB_CMD_STS_INTRMDT:
    case MB_CMD_STS_GOOD:
    case MB_CMD_STS_INVLD_CMD:
    case MB_CMD_STS_XFC_ERR:
    case MB_CMD_STS_CSUM_ERR:
    case MB_CMD_STS_ERR:
    case MB_CMD_STS_PARAM_ERR:
        /* We can only get mailbox status if we're polling from an
         * unfinished command.  Get the rest of the status data and
         * return back to the caller.
         * We only end up here when we're polling for a mailbox
         * command completion.
         */
        mbcp->out_count = orig_count;
        status = ql_get_mb_sts(qdev, mbcp);
        return status;

    /* We are being asked by firmware to accept
     * a change to the port.  This is only
     * a change to max frame sizes (Tx/Rx), pause
     * parameters, or loopback mode.
     */
    case AEN_IDC_REQ:
        status = ql_idc_req_aen(qdev);
        break;

    /* Process and inbound IDC event.
     * This will happen when we're trying to
     * change tx/rx max frame size, change pause
     * parameters or loopback mode.
     */
    case AEN_IDC_CMPLT:
    case AEN_IDC_EXT:
        status = ql_idc_cmplt_aen(qdev);
        break;

    case AEN_LINK_UP:
        ql_link_up(qdev, mbcp);
        break;

    case AEN_LINK_DOWN:
        ql_link_down(qdev, mbcp);
        break;

    case AEN_FW_INIT_DONE:
        /* If we're in process on executing the firmware,
         * then convert the status to normal mailbox status.
         */
        if (mbcp->mbox_in[0] == MB_CMD_EX_FW) {
            mbcp->out_count = orig_count;
            status = ql_get_mb_sts(qdev, mbcp);
            mbcp->mbox_out[0] = MB_CMD_STS_GOOD;
            return status;
        }
        ql_init_fw_done(qdev, mbcp);
        break;

    case AEN_AEN_SFP_IN:
        ql_sfp_in(qdev, mbcp);
        break;

    case AEN_AEN_SFP_OUT:
        ql_sfp_out(qdev, mbcp);
        break;

    /* This event can arrive at boot time or after an
     * MPI reset if the firmware failed to initialize.
     */
    case AEN_FW_INIT_FAIL:
        /* If we're in process on executing the firmware,
         * then convert the status to normal mailbox status.
         */
        if (mbcp->mbox_in[0] == MB_CMD_EX_FW) {
            mbcp->out_count = orig_count;
            status = ql_get_mb_sts(qdev, mbcp);
            mbcp->mbox_out[0] = MB_CMD_STS_ERR;
            return status;
        }
        netif_err(qdev, drv, qdev->ndev,
              "Firmware initialization failed.\n");
        status = -EIO;
        ql_queue_fw_error(qdev);
        break;

    case AEN_SYS_ERR:
        netif_err(qdev, drv, qdev->ndev, "System Error.\n");
        ql_queue_fw_error(qdev);
        status = -EIO;
        break;

    case AEN_AEN_LOST:
        ql_aen_lost(qdev, mbcp);
        break;

    case AEN_DCBX_CHG:
        /* Need to support AEN 8110 */
        break;
    default:
        netif_err(qdev, drv, qdev->ndev,
              "Unsupported AE %.08x.\n", mbcp->mbox_out[0]);
        /* Clear the MPI firmware status. */
    }
end:
    ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
    /* Restore the original mailbox count to
     * what the caller asked for.  This can get
     * changed when a mailbox command is waiting
     * for a response and an AEN arrives and
     * is handled.
     * */
    mbcp->out_count = orig_count;
    return status;
}

/* Execute a single mailbox command.
 * mbcp is a pointer to an array of u32.  Each
 * element in the array contains the value for it's
 * respective mailbox register.
 */
static int ql_mailbox_command(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
    int status;
    unsigned long count;

    mutex_lock(&qdev->mpi_mutex);

    /* Begin polled mode for MPI */
    ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));

    /* Load the mailbox registers and wake up MPI RISC. */
    status = ql_exec_mb_cmd(qdev, mbcp);
    if (status)
        goto end;


    /* If we're generating a system error, then there's nothing
     * to wait for.
     */
    if (mbcp->mbox_in[0] == MB_CMD_MAKE_SYS_ERR)
        goto end;

    /* Wait for the command to complete. We loop
     * here because some AEN might arrive while
     * we're waiting for the mailbox command to
     * complete. If more than 5 seconds expire we can
     * assume something is wrong. */
    count = jiffies + HZ * MAILBOX_TIMEOUT;
    do {
        /* Wait for the interrupt to come in. */
        status = ql_wait_mbx_cmd_cmplt(qdev);
        if (status)
            continue;

        /* Process the event.  If it's an AEN, it
         * will be handled in-line or a worker
         * will be spawned. If it's our completion
         * we will catch it below.
         */
        status = ql_mpi_handler(qdev, mbcp);
        if (status)
            goto end;

        /* It's either the completion for our mailbox
         * command complete or an AEN.  If it's our
         * completion then get out.
         */
        if (((mbcp->mbox_out[0] & 0x0000f000) ==
                    MB_CMD_STS_GOOD) ||
            ((mbcp->mbox_out[0] & 0x0000f000) ==
                    MB_CMD_STS_INTRMDT))
            goto done;
    } while (time_before(jiffies, count));

    netif_err(qdev, drv, qdev->ndev,
          "Timed out waiting for mailbox complete.\n");
    status = -ETIMEDOUT;
    goto end;

done:

    /* Now we can clear the interrupt condition
     * and look at our status.
     */
    ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);

    if (((mbcp->mbox_out[0] & 0x0000f000) !=
                    MB_CMD_STS_GOOD) &&
        ((mbcp->mbox_out[0] & 0x0000f000) !=
                    MB_CMD_STS_INTRMDT)) {
        status = -EIO;
    }
end:
    /* End polled mode for MPI */
    ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16) | INTR_MASK_PI);
    mutex_unlock(&qdev->mpi_mutex);
    return status;
}

/* Get MPI firmware version. This will be used for
 * driver banner and for ethtool info.
 * Returns zero on success.
 */
int ql_mb_about_fw(struct ql_adapter *qdev)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status = 0;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 1;
    mbcp->out_count = 3;

    mbcp->mbox_in[0] = MB_CMD_ABOUT_FW;

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev,
              "Failed about firmware command\n");
        status = -EIO;
    }

    /* Store the firmware version */
    qdev->fw_rev_id = mbcp->mbox_out[1];

    return status;
}

/* Get functional state for MPI firmware.
 * Returns zero on success.
 */
int ql_mb_get_fw_state(struct ql_adapter *qdev)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status = 0;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 1;
    mbcp->out_count = 2;

    mbcp->mbox_in[0] = MB_CMD_GET_FW_STATE;

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev,
              "Failed Get Firmware State.\n");
        status = -EIO;
    }

    /* If bit zero is set in mbx 1 then the firmware is
     * running, but not initialized.  This should never
     * happen.
     */
    if (mbcp->mbox_out[1] & 1) {
        netif_err(qdev, drv, qdev->ndev,
              "Firmware waiting for initialization.\n");
        status = -EIO;
    }

    return status;
}

/* Send and ACK mailbox command to the firmware to
 * let it continue with the change.
 */
static int ql_mb_idc_ack(struct ql_adapter *qdev)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status = 0;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 5;
    mbcp->out_count = 1;

    mbcp->mbox_in[0] = MB_CMD_IDC_ACK;
    mbcp->mbox_in[1] = qdev->idc_mbc.mbox_out[1];
    mbcp->mbox_in[2] = qdev->idc_mbc.mbox_out[2];
    mbcp->mbox_in[3] = qdev->idc_mbc.mbox_out[3];
    mbcp->mbox_in[4] = qdev->idc_mbc.mbox_out[4];

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev, "Failed IDC ACK send.\n");
        status = -EIO;
    }
    return status;
}

/* Get link settings and maximum frame size settings
 * for the current port.
 * Most likely will block.
 */
int ql_mb_set_port_cfg(struct ql_adapter *qdev)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status = 0;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 3;
    mbcp->out_count = 1;

    mbcp->mbox_in[0] = MB_CMD_SET_PORT_CFG;
    mbcp->mbox_in[1] = qdev->link_config;
    mbcp->mbox_in[2] = qdev->max_frame_size;


    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] == MB_CMD_STS_INTRMDT) {
        netif_err(qdev, drv, qdev->ndev,
              "Port Config sent, wait for IDC.\n");
    } else  if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev,
              "Failed Set Port Configuration.\n");
        status = -EIO;
    }
    return status;
}

static int ql_mb_dump_ram(struct ql_adapter *qdev, u64 req_dma, u32 addr,
    u32 size)
{
    int status = 0;
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 9;
    mbcp->out_count = 1;

    mbcp->mbox_in[0] = MB_CMD_DUMP_RISC_RAM;
    mbcp->mbox_in[1] = LSW(addr);
    mbcp->mbox_in[2] = MSW(req_dma);
    mbcp->mbox_in[3] = LSW(req_dma);
    mbcp->mbox_in[4] = MSW(size);
    mbcp->mbox_in[5] = LSW(size);
    mbcp->mbox_in[6] = MSW(MSD(req_dma));
    mbcp->mbox_in[7] = LSW(MSD(req_dma));
    mbcp->mbox_in[8] = MSW(addr);


    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev, "Failed to dump risc RAM.\n");
        status = -EIO;
    }
    return status;
}

/* Issue a mailbox command to dump RISC RAM. */
int ql_dump_risc_ram_area(struct ql_adapter *qdev, void *buf,
        u32 ram_addr, int word_count)
{
    int status;
    char *my_buf;
    dma_addr_t buf_dma;

    my_buf = pci_alloc_consistent(qdev->pdev, word_count * sizeof(u32),
                    &buf_dma);
    if (!my_buf)
        return -EIO;

    status = ql_mb_dump_ram(qdev, buf_dma, ram_addr, word_count);
    if (!status)
        memcpy(buf, my_buf, word_count * sizeof(u32));

    pci_free_consistent(qdev->pdev, word_count * sizeof(u32), my_buf,
                buf_dma);
    return status;
}

/* Get link settings and maximum frame size settings
 * for the current port.
 * Most likely will block.
 */
int ql_mb_get_port_cfg(struct ql_adapter *qdev)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status = 0;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 1;
    mbcp->out_count = 3;

    mbcp->mbox_in[0] = MB_CMD_GET_PORT_CFG;

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev,
              "Failed Get Port Configuration.\n");
        status = -EIO;
    } else  {
        netif_printk(qdev, drv, KERN_DEBUG, qdev->ndev,
                 "Passed Get Port Configuration.\n");
        qdev->link_config = mbcp->mbox_out[1];
        qdev->max_frame_size = mbcp->mbox_out[2];
    }
    return status;
}

int ql_mb_wol_mode(struct ql_adapter *qdev, u32 wol)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 2;
    mbcp->out_count = 1;

    mbcp->mbox_in[0] = MB_CMD_SET_WOL_MODE;
    mbcp->mbox_in[1] = wol;


    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev, "Failed to set WOL mode.\n");
        status = -EIO;
    }
    return status;
}

int ql_mb_wol_set_magic(struct ql_adapter *qdev, u32 enable_wol)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status;
    u8 *addr = qdev->ndev->dev_addr;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 8;
    mbcp->out_count = 1;

    mbcp->mbox_in[0] = MB_CMD_SET_WOL_MAGIC;
    if (enable_wol) {
        mbcp->mbox_in[1] = (u32)addr[0];
        mbcp->mbox_in[2] = (u32)addr[1];
        mbcp->mbox_in[3] = (u32)addr[2];
        mbcp->mbox_in[4] = (u32)addr[3];
        mbcp->mbox_in[5] = (u32)addr[4];
        mbcp->mbox_in[6] = (u32)addr[5];
        mbcp->mbox_in[7] = 0;
    } else {
        mbcp->mbox_in[1] = 0;
        mbcp->mbox_in[2] = 1;
        mbcp->mbox_in[3] = 1;
        mbcp->mbox_in[4] = 1;
        mbcp->mbox_in[5] = 1;
        mbcp->mbox_in[6] = 1;
        mbcp->mbox_in[7] = 0;
    }

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev, "Failed to set WOL mode.\n");
        status = -EIO;
    }
    return status;
}

/* IDC - Inter Device Communication...
 * Some firmware commands require consent of adjacent FCOE
 * function.  This function waits for the OK, or a
 * counter-request for a little more time.i
 * The firmware will complete the request if the other
 * function doesn't respond.
 */
static int ql_idc_wait(struct ql_adapter *qdev)
{
    int status = -ETIMEDOUT;
    long wait_time = 1 * HZ;
    struct mbox_params *mbcp = &qdev->idc_mbc;
    do {
        /* Wait here for the command to complete
         * via the IDC process.
         */
        wait_time =
            wait_for_completion_timeout(&qdev->ide_completion,
                            wait_time);
        if (!wait_time) {
            netif_err(qdev, drv, qdev->ndev, "IDC Timeout.\n");
            break;
        }
        /* Now examine the response from the IDC process.
         * We might have a good completion or a request for
         * more wait time.
         */
        if (mbcp->mbox_out[0] == AEN_IDC_EXT) {
            netif_err(qdev, drv, qdev->ndev,
                  "IDC Time Extension from function.\n");
            wait_time += (mbcp->mbox_out[1] >> 8) & 0x0000000f;
        } else if (mbcp->mbox_out[0] == AEN_IDC_CMPLT) {
            netif_err(qdev, drv, qdev->ndev, "IDC Success.\n");
            status = 0;
            break;
        } else {
            netif_err(qdev, drv, qdev->ndev,
                  "IDC: Invalid State 0x%.04x.\n",
                  mbcp->mbox_out[0]);
            status = -EIO;
            break;
        }
    } while (wait_time);

    return status;
}

int ql_mb_set_led_cfg(struct ql_adapter *qdev, u32 led_config)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 2;
    mbcp->out_count = 1;

    mbcp->mbox_in[0] = MB_CMD_SET_LED_CFG;
    mbcp->mbox_in[1] = led_config;


    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev,
              "Failed to set LED Configuration.\n");
        status = -EIO;
    }

    return status;
}

int ql_mb_get_led_cfg(struct ql_adapter *qdev)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 1;
    mbcp->out_count = 2;

    mbcp->mbox_in[0] = MB_CMD_GET_LED_CFG;

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
        netif_err(qdev, drv, qdev->ndev,
              "Failed to get LED Configuration.\n");
        status = -EIO;
    } else
        qdev->led_config = mbcp->mbox_out[1];

    return status;
}

int ql_mb_set_mgmnt_traffic_ctl(struct ql_adapter *qdev, u32 control)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status;

    memset(mbcp, 0, sizeof(struct mbox_params));

    mbcp->in_count = 1;
    mbcp->out_count = 2;

    mbcp->mbox_in[0] = MB_CMD_SET_MGMNT_TFK_CTL;
    mbcp->mbox_in[1] = control;

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] == MB_CMD_STS_GOOD)
        return status;

    if (mbcp->mbox_out[0] == MB_CMD_STS_INVLD_CMD) {
        netif_err(qdev, drv, qdev->ndev,
              "Command not supported by firmware.\n");
        status = -EINVAL;
    } else if (mbcp->mbox_out[0] == MB_CMD_STS_ERR) {
        /* This indicates that the firmware is
         * already in the state we are trying to
         * change it to.
         */
        netif_err(qdev, drv, qdev->ndev,
              "Command parameters make no change.\n");
    }
    return status;
}

/* Returns a negative error code or the mailbox command status. */
static int ql_mb_get_mgmnt_traffic_ctl(struct ql_adapter *qdev, u32 *control)
{
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int status;

    memset(mbcp, 0, sizeof(struct mbox_params));
    *control = 0;

    mbcp->in_count = 1;
    mbcp->out_count = 1;

    mbcp->mbox_in[0] = MB_CMD_GET_MGMNT_TFK_CTL;

    status = ql_mailbox_command(qdev, mbcp);
    if (status)
        return status;

    if (mbcp->mbox_out[0] == MB_CMD_STS_GOOD) {
        *control = mbcp->mbox_in[1];
        return status;
    }

    if (mbcp->mbox_out[0] == MB_CMD_STS_INVLD_CMD) {
        netif_err(qdev, drv, qdev->ndev,
              "Command not supported by firmware.\n");
        status = -EINVAL;
    } else if (mbcp->mbox_out[0] == MB_CMD_STS_ERR) {
        netif_err(qdev, drv, qdev->ndev,
              "Failed to get MPI traffic control.\n");
        status = -EIO;
    }
    return status;
}

int ql_wait_fifo_empty(struct ql_adapter *qdev)
{
    int count = 5;
    u32 mgmnt_fifo_empty;
    u32 nic_fifo_empty;

    do {
        nic_fifo_empty = ql_read32(qdev, STS) & STS_NFE;
        ql_mb_get_mgmnt_traffic_ctl(qdev, &mgmnt_fifo_empty);
        mgmnt_fifo_empty &= MB_GET_MPI_TFK_FIFO_EMPTY;
        if (nic_fifo_empty && mgmnt_fifo_empty)
            return 0;
        msleep(100);
    } while (count-- > 0);
    return -ETIMEDOUT;
}

/* API called in work thread context to set new TX/RX
 * maximum frame size values to match MTU.
 */
static int ql_set_port_cfg(struct ql_adapter *qdev)
{
    int status;
    status = ql_mb_set_port_cfg(qdev);
    if (status)
        return status;
    status = ql_idc_wait(qdev);
    return status;
}

/* The following routines are worker threads that process
 * events that may sleep waiting for completion.
 */

/* This thread gets the maximum TX and RX frame size values
 * from the firmware and, if necessary, changes them to match
 * the MTU setting.
 */
void ql_mpi_port_cfg_work(struct work_struct *work)
{
    struct ql_adapter *qdev =
        container_of(work, struct ql_adapter, mpi_port_cfg_work.work);
    int status;

    status = ql_mb_get_port_cfg(qdev);
    if (status) {
        netif_err(qdev, drv, qdev->ndev,
              "Bug: Failed to get port config data.\n");
        goto err;
    }

    if (qdev->link_config & CFG_JUMBO_FRAME_SIZE &&
            qdev->max_frame_size ==
            CFG_DEFAULT_MAX_FRAME_SIZE)
        goto end;

    qdev->link_config |=    CFG_JUMBO_FRAME_SIZE;
    qdev->max_frame_size = CFG_DEFAULT_MAX_FRAME_SIZE;
    status = ql_set_port_cfg(qdev);
    if (status) {
        netif_err(qdev, drv, qdev->ndev,
              "Bug: Failed to set port config data.\n");
        goto err;
    }
end:
    clear_bit(QL_PORT_CFG, &qdev->flags);
    return;
err:
    ql_queue_fw_error(qdev);
    goto end;
}

/* Process an inter-device request.  This is issues by
 * the firmware in response to another function requesting
 * a change to the port. We set a flag to indicate a change
 * has been made and then send a mailbox command ACKing
 * the change request.
 */
void ql_mpi_idc_work(struct work_struct *work)
{
    struct ql_adapter *qdev =
        container_of(work, struct ql_adapter, mpi_idc_work.work);
    int status;
    struct mbox_params *mbcp = &qdev->idc_mbc;
    u32 aen;
    int timeout;

    aen = mbcp->mbox_out[1] >> 16;
    timeout = (mbcp->mbox_out[1] >> 8) & 0xf;

    switch (aen) {
    default:
        netif_err(qdev, drv, qdev->ndev,
              "Bug: Unhandled IDC action.\n");
        break;
    case MB_CMD_PORT_RESET:
    case MB_CMD_STOP_FW:
        ql_link_off(qdev);
    case MB_CMD_SET_PORT_CFG:
        /* Signal the resulting link up AEN
         * that the frame routing and mac addr
         * needs to be set.
         * */
        set_bit(QL_CAM_RT_SET, &qdev->flags);
        /* Do ACK if required */
        if (timeout) {
            status = ql_mb_idc_ack(qdev);
            if (status)
                netif_err(qdev, drv, qdev->ndev,
                      "Bug: No pending IDC!\n");
        } else {
            netif_printk(qdev, drv, KERN_DEBUG, qdev->ndev,
                     "IDC ACK not required\n");
            status = 0; /* success */
        }
        break;

    /* These sub-commands issued by another (FCoE)
     * function are requesting to do an operation
     * on the shared resource (MPI environment).
     * We currently don't issue these so we just
     * ACK the request.
     */
    case MB_CMD_IOP_RESTART_MPI:
    case MB_CMD_IOP_PREP_LINK_DOWN:
        /* Drop the link, reload the routing
         * table when link comes up.
         */
        ql_link_off(qdev);
        set_bit(QL_CAM_RT_SET, &qdev->flags);
        /* Fall through. */
    case MB_CMD_IOP_DVR_START:
    case MB_CMD_IOP_FLASH_ACC:
    case MB_CMD_IOP_CORE_DUMP_MPI:
    case MB_CMD_IOP_PREP_UPDATE_MPI:
    case MB_CMD_IOP_COMP_UPDATE_MPI:
    case MB_CMD_IOP_NONE:   /*  an IDC without params */
        /* Do ACK if required */
        if (timeout) {
            status = ql_mb_idc_ack(qdev);
            if (status)
                netif_err(qdev, drv, qdev->ndev,
                      "Bug: No pending IDC!\n");
        } else {
            netif_printk(qdev, drv, KERN_DEBUG, qdev->ndev,
                     "IDC ACK not required\n");
            status = 0; /* success */
        }
        break;
    }
}

void ql_mpi_work(struct work_struct *work)
{
    struct ql_adapter *qdev =
        container_of(work, struct ql_adapter, mpi_work.work);
    struct mbox_params mbc;
    struct mbox_params *mbcp = &mbc;
    int err = 0;

    mutex_lock(&qdev->mpi_mutex);
    /* Begin polled mode for MPI */
    ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));

    while (ql_read32(qdev, STS) & STS_PI) {
        memset(mbcp, 0, sizeof(struct mbox_params));
        mbcp->out_count = 1;
        /* Don't continue if an async event
         * did not complete properly.
         */
        err = ql_mpi_handler(qdev, mbcp);
        if (err)
            break;
    }

    /* End polled mode for MPI */
    ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16) | INTR_MASK_PI);
    mutex_unlock(&qdev->mpi_mutex);
    ql_enable_completion_interrupt(qdev, 0);
}

void ql_mpi_reset_work(struct work_struct *work)
{
    struct ql_adapter *qdev =
        container_of(work, struct ql_adapter, mpi_reset_work.work);
    cancel_delayed_work_sync(&qdev->mpi_work);
    cancel_delayed_work_sync(&qdev->mpi_port_cfg_work);
    cancel_delayed_work_sync(&qdev->mpi_idc_work);
    /* If we're not the dominant NIC function,
     * then there is nothing to do.
     */
    if (!ql_own_firmware(qdev)) {
        netif_err(qdev, drv, qdev->ndev, "Don't own firmware!\n");
        return;
    }

    if (!ql_core_dump(qdev, qdev->mpi_coredump)) {
        netif_err(qdev, drv, qdev->ndev, "Core is dumped!\n");
        qdev->core_is_dumped = 1;
        queue_delayed_work(qdev->workqueue,
            &qdev->mpi_core_to_log, 5 * HZ);
    }
    ql_soft_reset_mpi_risc(qdev);
}