io/hxge/hpi_rxdma.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <hpi_rxdma.h>
#include <hxge_common.h>
#include <hxge_impl.h>

#define  RXDMA_RESET_TRY_COUNT  5
#define  RXDMA_RESET_DELAY  5

#define  RXDMA_OP_DISABLE   0
#define  RXDMA_OP_ENABLE    1
#define  RXDMA_OP_RESET     2

#define  RCR_TIMEOUT_ENABLE 1
#define  RCR_TIMEOUT_DISABLE    2
#define  RCR_THRESHOLD      4

hpi_status_t
hpi_rxdma_cfg_logical_page_handle(hpi_handle_t handle, uint8_t rdc,
    uint64_t page_handle)
{
    rdc_page_handle_t page_hdl;

    if (!RXDMA_CHANNEL_VALID(rdc)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "rxdma_cfg_logical_page_handle"
            " Illegal RDC number %d \n", rdc));
        return (HPI_RXDMA_RDC_INVALID);
    }

    page_hdl.value = 0;
    page_hdl.bits.handle = (uint32_t)page_handle;

    RXDMA_REG_WRITE64(handle, RDC_PAGE_HANDLE, rdc, page_hdl.value);

    return (HPI_SUCCESS);
}

hpi_status_t
hpi_rxdma_cfg_rdc_wait_for_qst(hpi_handle_t handle, uint8_t rdc)
{
    rdc_rx_cfg1_t   cfg;
    uint32_t    count = RXDMA_RESET_TRY_COUNT;
    uint32_t    delay_time = RXDMA_RESET_DELAY;

    RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);

    while ((count--) && (cfg.bits.qst == 0)) {
        HXGE_DELAY(delay_time);
        RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);
    }

    if (cfg.bits.qst == 0)
        return (HPI_FAILURE);

    return (HPI_SUCCESS);
}

/* RX DMA functions */
static hpi_status_t
hpi_rxdma_cfg_rdc_ctl(hpi_handle_t handle, uint8_t rdc, uint8_t op)
{
    rdc_rx_cfg1_t cfg;
    uint32_t count = RXDMA_RESET_TRY_COUNT;
    uint32_t delay_time = RXDMA_RESET_DELAY;
    uint32_t error = HPI_RXDMA_ERROR_ENCODE(HPI_RXDMA_RESET_ERR, rdc);

    if (!RXDMA_CHANNEL_VALID(rdc)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "hpi_rxdma_cfg_rdc_ctl Illegal RDC number %d \n", rdc));
        return (HPI_RXDMA_RDC_INVALID);
    }

    switch (op) {
    case RXDMA_OP_ENABLE:
        RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);
        cfg.bits.enable = 1;
        RXDMA_REG_WRITE64(handle, RDC_RX_CFG1, rdc, cfg.value);

        HXGE_DELAY(delay_time);
        RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);

        while ((count--) && (cfg.bits.qst == 1)) {
            HXGE_DELAY(delay_time);
            RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);
        }
        if (cfg.bits.qst == 1) {
            return (HPI_FAILURE);
        }
        break;

    case RXDMA_OP_DISABLE:
        RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);
        cfg.bits.enable = 0;
        RXDMA_REG_WRITE64(handle, RDC_RX_CFG1, rdc, cfg.value);

        HXGE_DELAY(delay_time);
        if (hpi_rxdma_cfg_rdc_wait_for_qst(handle,
            rdc) != HPI_SUCCESS) {
            HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
                " hpi_rxdma_cfg_rdc_ctl"
                " RXDMA_OP_DISABLE Failed for RDC %d \n",
                rdc));
            return (error);
        }
        break;

    case RXDMA_OP_RESET:
        cfg.value = 0;
        cfg.bits.reset = 1;
        RXDMA_REG_WRITE64(handle, RDC_RX_CFG1, rdc, cfg.value);
        HXGE_DELAY(delay_time);
        RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);

        while ((count--) && (cfg.bits.qst == 0)) {
            HXGE_DELAY(delay_time);
            RXDMA_REG_READ64(handle, RDC_RX_CFG1, rdc, &cfg.value);
        }
        if (count == 0) {
            HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
                " hpi_rxdma_cfg_rdc_ctl"
                " Reset Failed for RDC %d \n", rdc));
            return (error);
        }
        break;

    default:
        return (HPI_RXDMA_SW_PARAM_ERROR);
    }

    return (HPI_SUCCESS);
}

hpi_status_t
hpi_rxdma_cfg_rdc_enable(hpi_handle_t handle, uint8_t rdc)
{
    return (hpi_rxdma_cfg_rdc_ctl(handle, rdc, RXDMA_OP_ENABLE));
}

hpi_status_t
hpi_rxdma_cfg_rdc_disable(hpi_handle_t handle, uint8_t rdc)
{
    return (hpi_rxdma_cfg_rdc_ctl(handle, rdc, RXDMA_OP_DISABLE));
}

hpi_status_t
hpi_rxdma_cfg_rdc_reset(hpi_handle_t handle, uint8_t rdc)
{
    return (hpi_rxdma_cfg_rdc_ctl(handle, rdc, RXDMA_OP_RESET));
}

static hpi_status_t
hpi_rxdma_cfg_rdc_rcr_ctl(hpi_handle_t handle, uint8_t rdc,
    uint8_t op, uint16_t param)
{
    rdc_rcr_cfg_b_t rcr_cfgb;

    if (!RXDMA_CHANNEL_VALID(rdc)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "rxdma_cfg_rdc_rcr_ctl Illegal RDC number %d \n", rdc));
        return (HPI_RXDMA_RDC_INVALID);
    }

    RXDMA_REG_READ64(handle, RDC_RCR_CFG_B, rdc, &rcr_cfgb.value);

    switch (op) {
    case RCR_TIMEOUT_ENABLE:
        rcr_cfgb.bits.timeout = (uint8_t)param;
        rcr_cfgb.bits.entout = 1;
        break;

    case RCR_THRESHOLD:
        rcr_cfgb.bits.pthres = param;
        break;

    case RCR_TIMEOUT_DISABLE:
        rcr_cfgb.bits.entout = 0;
        break;

    default:
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "rxdma_cfg_rdc_rcr_ctl Illegal opcode %x \n", op));
        return (HPI_RXDMA_OPCODE_INVALID(rdc));
    }

    RXDMA_REG_WRITE64(handle, RDC_RCR_CFG_B, rdc, rcr_cfgb.value);
    return (HPI_SUCCESS);
}

hpi_status_t
hpi_rxdma_cfg_rdc_rcr_threshold(hpi_handle_t handle, uint8_t rdc,
    uint16_t rcr_threshold)
{
    return (hpi_rxdma_cfg_rdc_rcr_ctl(handle, rdc,
        RCR_THRESHOLD, rcr_threshold));
}

hpi_status_t
hpi_rxdma_cfg_rdc_rcr_timeout(hpi_handle_t handle, uint8_t rdc,
    uint8_t rcr_timeout)
{
    return (hpi_rxdma_cfg_rdc_rcr_ctl(handle, rdc,
        RCR_TIMEOUT_ENABLE, rcr_timeout));
}

/*
 * Configure The RDC channel Rcv Buffer Ring
 */
hpi_status_t
hpi_rxdma_cfg_rdc_ring(hpi_handle_t handle, uint8_t rdc,
    rdc_desc_cfg_t *rdc_desc_cfg)
{
    rdc_rbr_cfg_a_t     cfga;
    rdc_rbr_cfg_b_t     cfgb;
    rdc_rx_cfg1_t       cfg1;
    rdc_rx_cfg2_t       cfg2;
    rdc_rcr_cfg_a_t     rcr_cfga;
    rdc_rcr_cfg_b_t     rcr_cfgb;
    rdc_page_handle_t   page_handle;

    if (!RXDMA_CHANNEL_VALID(rdc)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "rxdma_cfg_rdc_ring Illegal RDC number %d \n", rdc));
        return (HPI_RXDMA_RDC_INVALID);
    }

    cfga.value = 0;
    cfgb.value = 0;
    cfg1.value = 0;
    cfg2.value = 0;
    page_handle.value = 0;

    if (rdc_desc_cfg->mbox_enable == 1) {
        cfg1.bits.mbaddr_h = (rdc_desc_cfg->mbox_addr >> 32) & 0xfff;
        cfg2.bits.mbaddr_l = ((rdc_desc_cfg->mbox_addr &
            RXDMA_CFIG2_MBADDR_L_MASK) >> RXDMA_CFIG2_MBADDR_L_SHIFT);

        /*
         * Only after all the configurations are set, then
         * enable the RDC or else configuration fatal error
         * will be returned (especially if the Hypervisor
         * set up the logical pages with non-zero values.
         * This HPI function only sets up the configuration.
         * Call the enable function to enable the RDMC!
         */
    }

    if (rdc_desc_cfg->full_hdr == 1)
        cfg2.bits.full_hdr = 1;

    if (RXDMA_BUFF_OFFSET_VALID(rdc_desc_cfg->offset)) {
        cfg2.bits.offset = rdc_desc_cfg->offset;
    } else {
        cfg2.bits.offset = SW_OFFSET_NO_OFFSET;
    }

    /* rbr config */
    cfga.value = (rdc_desc_cfg->rbr_addr &
        (RBR_CFIG_A_STDADDR_MASK | RBR_CFIG_A_STDADDR_BASE_MASK));

    /* The remaining 20 bits in the DMA address form the handle */
    page_handle.bits.handle = (rdc_desc_cfg->rbr_addr >> 44) && 0xfffff;

    /*
     * The RBR ring size must be multiple of 64.
     */
    if ((rdc_desc_cfg->rbr_len < RBR_DEFAULT_MIN_LEN) ||
        (rdc_desc_cfg->rbr_len > RBR_DEFAULT_MAX_LEN) ||
        (rdc_desc_cfg->rbr_len % 64)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "hpi_rxdma_cfg_rdc_ring Illegal RBR Queue Length %d \n",
            rdc_desc_cfg->rbr_len));
        return (HPI_RXDMA_ERROR_ENCODE(HPI_RXDMA_RBRSZIE_INVALID, rdc));
    }

    /*
     * The lower 6 bits are hardcoded to 0 and the higher 10 bits are
     * stored in len.
     */
    cfga.bits.len = rdc_desc_cfg->rbr_len >> 6;
    HPI_DEBUG_MSG((handle.function, HPI_RDC_CTL,
        "hpi_rxdma_cfg_rdc_ring CFGA 0x%llx len %d (RBR LEN %d)\n",
        cfga.value, cfga.bits.len, rdc_desc_cfg->rbr_len));

    /*
     * bksize is 1 bit
     * Buffer Block Size. b0 - 4K; b1 - 8K.
     */
    if (rdc_desc_cfg->page_size == SIZE_4KB)
        cfgb.bits.bksize = RBR_BKSIZE_4K;
    else if (rdc_desc_cfg->page_size == SIZE_8KB)
        cfgb.bits.bksize = RBR_BKSIZE_8K;
    else {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "rxdma_cfg_rdc_ring blksize: Illegal buffer size %d \n",
            rdc_desc_cfg->page_size));
        return (HPI_RXDMA_BUFSZIE_INVALID);
    }

    /*
     * Size 0 of packet buffer. b00 - 256; b01 - 512; b10 - 1K; b11 - resvd.
     */
    if (rdc_desc_cfg->valid0) {
        if (rdc_desc_cfg->size0 == SIZE_256B)
            cfgb.bits.bufsz0 = RBR_BUFSZ0_256B;
        else if (rdc_desc_cfg->size0 == SIZE_512B)
            cfgb.bits.bufsz0 = RBR_BUFSZ0_512B;
        else if (rdc_desc_cfg->size0 == SIZE_1KB)
            cfgb.bits.bufsz0 = RBR_BUFSZ0_1K;
        else {
            HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
                " rxdma_cfg_rdc_ring"
                " blksize0: Illegal buffer size %x \n",
                rdc_desc_cfg->size0));
            return (HPI_RXDMA_BUFSZIE_INVALID);
        }
        cfgb.bits.vld0 = 1;
    } else {
        cfgb.bits.vld0 = 0;
    }

    /*
     * Size 1 of packet buffer. b0 - 1K; b1 - 2K.
     */
    if (rdc_desc_cfg->valid1) {
        if (rdc_desc_cfg->size1 == SIZE_1KB)
            cfgb.bits.bufsz1 = RBR_BUFSZ1_1K;
        else if (rdc_desc_cfg->size1 == SIZE_2KB)
            cfgb.bits.bufsz1 = RBR_BUFSZ1_2K;
        else {
            HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
                " rxdma_cfg_rdc_ring"
                " blksize1: Illegal buffer size %x \n",
                rdc_desc_cfg->size1));
            return (HPI_RXDMA_BUFSZIE_INVALID);
        }
        cfgb.bits.vld1 = 1;
    } else {
        cfgb.bits.vld1 = 0;
    }

    /*
     * Size 2 of packet buffer. b0 - 2K; b1 - 4K.
     */
    if (rdc_desc_cfg->valid2) {
        if (rdc_desc_cfg->size2 == SIZE_2KB)
            cfgb.bits.bufsz2 = RBR_BUFSZ2_2K;
        else if (rdc_desc_cfg->size2 == SIZE_4KB)
            cfgb.bits.bufsz2 = RBR_BUFSZ2_4K;
        else {
            HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
                " rxdma_cfg_rdc_ring"
                " blksize2: Illegal buffer size %x \n",
                rdc_desc_cfg->size2));
            return (HPI_RXDMA_BUFSZIE_INVALID);
        }
        cfgb.bits.vld2 = 1;
    } else {
        cfgb.bits.vld2 = 0;
    }

    rcr_cfga.value = (rdc_desc_cfg->rcr_addr &
        (RCRCFIG_A_STADDR_MASK | RCRCFIG_A_STADDR_BASE_MASK));

    /*
     * The rcr len must be multiple of 32.
     */
    if ((rdc_desc_cfg->rcr_len < RCR_DEFAULT_MIN_LEN) ||
        (rdc_desc_cfg->rcr_len > HXGE_RCR_MAX) ||
        (rdc_desc_cfg->rcr_len % 32)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            " rxdma_cfg_rdc_ring Illegal RCR Queue Length %d \n",
            rdc_desc_cfg->rcr_len));
        return (HPI_RXDMA_ERROR_ENCODE(HPI_RXDMA_RCRSZIE_INVALID, rdc));
    }

    /*
     * Bits 15:5 of the maximum number of 8B entries in RCR.  Bits 4:0 are
     * hard-coded to zero.  The maximum size is 2^16 - 32.
     */
    rcr_cfga.bits.len = rdc_desc_cfg->rcr_len >> 5;

    rcr_cfgb.value = 0;
    if (rdc_desc_cfg->rcr_timeout_enable == 1) {
        /* check if the rcr timeout value is valid */

        if (RXDMA_RCR_TO_VALID(rdc_desc_cfg->rcr_timeout)) {
            rcr_cfgb.bits.timeout = rdc_desc_cfg->rcr_timeout;
            rcr_cfgb.bits.entout = 1;
        } else {
            HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
                " rxdma_cfg_rdc_ring"
                " Illegal RCR Timeout value %d \n",
                rdc_desc_cfg->rcr_timeout));
            rcr_cfgb.bits.entout = 0;
        }
    } else {
        rcr_cfgb.bits.entout = 0;
    }

    /* check if the rcr threshold value is valid */
    if (RXDMA_RCR_THRESH_VALID(rdc_desc_cfg->rcr_threshold)) {
        rcr_cfgb.bits.pthres = rdc_desc_cfg->rcr_threshold;
    } else {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            " rxdma_cfg_rdc_ring Illegal RCR Threshold value %d \n",
            rdc_desc_cfg->rcr_threshold));
        rcr_cfgb.bits.pthres = 1;
    }

    /* now do the actual HW configuration */
    RXDMA_REG_WRITE64(handle, RDC_RX_CFG1, rdc, cfg1.value);
    RXDMA_REG_WRITE64(handle, RDC_RX_CFG2, rdc, cfg2.value);

    RXDMA_REG_WRITE64(handle, RDC_RBR_CFG_A, rdc, cfga.value);
    RXDMA_REG_WRITE64(handle, RDC_RBR_CFG_B, rdc, cfgb.value);

    RXDMA_REG_WRITE64(handle, RDC_RCR_CFG_A, rdc, rcr_cfga.value);
    RXDMA_REG_WRITE64(handle, RDC_RCR_CFG_B, rdc, rcr_cfgb.value);

    RXDMA_REG_WRITE64(handle, RDC_PAGE_HANDLE, rdc, page_handle.value);

    return (HPI_SUCCESS);
}

hpi_status_t
hpi_rxdma_ring_perr_stat_get(hpi_handle_t handle,
    rdc_pref_par_log_t *pre_log, rdc_pref_par_log_t *sha_log)
{
    /*
     * Hydra doesn't have details about these errors.
     * It only provides the addresses of the errors.
     */
    HXGE_REG_RD64(handle, RDC_PREF_PAR_LOG, &pre_log->value);
    HXGE_REG_RD64(handle, RDC_SHADOW_PAR_LOG, &sha_log->value);

    return (HPI_SUCCESS);
}


/* system wide conf functions */

hpi_status_t
hpi_rxdma_cfg_clock_div_set(hpi_handle_t handle, uint16_t count)
{
    uint64_t    offset;
    rdc_clock_div_t clk_div;

    offset = RDC_CLOCK_DIV;

    clk_div.value = 0;
    clk_div.bits.count = count;
    HPI_DEBUG_MSG((handle.function, HPI_RDC_CTL,
        " hpi_rxdma_cfg_clock_div_set: add 0x%llx "
        "handle 0x%llx value 0x%llx",
        handle.regp, handle.regh, clk_div.value));

    HXGE_REG_WR64(handle, offset, clk_div.value);

    return (HPI_SUCCESS);
}


hpi_status_t
hpi_rxdma_rdc_rbr_stat_get(hpi_handle_t handle, uint8_t rdc,
    rdc_rbr_qlen_t *rbr_stat)
{
    if (!RXDMA_CHANNEL_VALID(rdc)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            " rxdma_rdc_rbr_stat_get Illegal RDC Number %d \n", rdc));
        return (HPI_RXDMA_RDC_INVALID);
    }

    RXDMA_REG_READ64(handle, RDC_RBR_QLEN, rdc, &rbr_stat->value);
    return (HPI_SUCCESS);
}


hpi_status_t
hpi_rxdma_rdc_rcr_qlen_get(hpi_handle_t handle, uint8_t rdc,
    uint16_t *rcr_qlen)
{
    rdc_rcr_qlen_t stats;

    if (!RXDMA_CHANNEL_VALID(rdc)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            " rxdma_rdc_rcr_qlen_get Illegal RDC Number %d \n", rdc));
        return (HPI_RXDMA_RDC_INVALID);
    }

    RXDMA_REG_READ64(handle, RDC_RCR_QLEN, rdc, &stats.value);
    *rcr_qlen =  stats.bits.qlen;
    HPI_DEBUG_MSG((handle.function, HPI_RDC_CTL,
        " rxdma_rdc_rcr_qlen_get RDC %d qlen %x qlen %x\n",
        rdc, *rcr_qlen, stats.bits.qlen));
    return (HPI_SUCCESS);
}

hpi_status_t
hpi_rxdma_channel_rbr_empty_clear(hpi_handle_t handle, uint8_t channel)
{
    rdc_stat_t  cs;

    if (!RXDMA_CHANNEL_VALID(channel)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            " hpi_rxdma_channel_rbr_empty_clear", " channel", channel));
        return (HPI_FAILURE | HPI_RXDMA_CHANNEL_INVALID(channel));
    }

    RXDMA_REG_READ64(handle, RDC_STAT, channel, &cs.value);
    cs.bits.rbr_empty = 1;
    RXDMA_REG_WRITE64(handle, RDC_STAT, channel, cs.value);

    return (HPI_SUCCESS);
}

/*
 * This function is called to operate on the control and status register.
 */
hpi_status_t
hpi_rxdma_control_status(hpi_handle_t handle, io_op_t op_mode, uint8_t channel,
    rdc_stat_t *cs_p)
{
    int     status = HPI_SUCCESS;
    rdc_stat_t  cs;

    if (!RXDMA_CHANNEL_VALID(channel)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "hpi_rxdma_control_status", "channel", channel));
        return (HPI_FAILURE | HPI_RXDMA_CHANNEL_INVALID(channel));
    }

    switch (op_mode) {
    case OP_GET:
        RXDMA_REG_READ64(handle, RDC_STAT, channel, &cs_p->value);
        break;

    case OP_SET:
        RXDMA_REG_WRITE64(handle, RDC_STAT, channel, cs_p->value);
        break;

    case OP_UPDATE:
        RXDMA_REG_READ64(handle, RDC_STAT, channel, &cs.value);
        RXDMA_REG_WRITE64(handle, RDC_STAT, channel,
            cs_p->value | cs.value);
        break;

    default:
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "hpi_rxdma_control_status", "control", op_mode));
        return (HPI_FAILURE | HPI_RXDMA_OPCODE_INVALID(channel));
    }

    return (status);
}

/*
 * This function is called to operate on the event mask
 * register which is used for generating interrupts.
 */
hpi_status_t
hpi_rxdma_event_mask(hpi_handle_t handle, io_op_t op_mode, uint8_t channel,
    rdc_int_mask_t *mask_p)
{
    int     status = HPI_SUCCESS;
    rdc_int_mask_t  mask;

    if (!RXDMA_CHANNEL_VALID(channel)) {
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "hpi_rxdma_event_mask", "channel", channel));
        return (HPI_FAILURE | HPI_RXDMA_CHANNEL_INVALID(channel));
    }

    switch (op_mode) {
    case OP_GET:
        RXDMA_REG_READ64(handle, RDC_INT_MASK, channel, &mask_p->value);
        break;

    case OP_SET:
        RXDMA_REG_WRITE64(handle, RDC_INT_MASK, channel, mask_p->value);
        break;

    case OP_UPDATE:
        RXDMA_REG_READ64(handle, RDC_INT_MASK, channel, &mask.value);
        RXDMA_REG_WRITE64(handle, RDC_INT_MASK, channel,
            mask_p->value | mask.value);
        break;

    default:
        HPI_ERROR_MSG((handle.function, HPI_ERR_CTL,
            "hpi_rxdma_event_mask", "eventmask", op_mode));
        return (HPI_FAILURE | HPI_RXDMA_OPCODE_INVALID(channel));
    }

    return (status);
}