/*
 * Copyright (c) 2012-2015 Solarflare Communications Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are
 * those of the authors and should not be interpreted as representing official
 * policies, either expressed or implied, of the FreeBSD Project.
 */

#include "efx.h"
#include "efx_impl.h"


#if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD


static  __checkReturn   efx_rc_t
efx_mcdi_init_rxq(
        __in            efx_nic_t *enp,
        __in            uint32_t size,
        __in            uint32_t target_evq,
        __in            uint32_t label,
        __in            uint32_t instance,
        __in            efsys_mem_t *esmp,
        __in            boolean_t disable_scatter)
{
        efx_mcdi_req_t req;

        uint8_t payload[
                MC_CMD_INIT_RXQ_IN_LEN(EFX_RXQ_NBUFS(EFX_RXQ_MAXNDESCS))];
        int npages = EFX_RXQ_NBUFS(size);
        int i;
        efx_qword_t *dma_addr;
        uint64_t addr;
        efx_rc_t rc;

        /* If this changes, then the payload size might need to change. */
        EFSYS_ASSERT3U(MC_CMD_INIT_RXQ_OUT_LEN, ==, 0);
        EFSYS_ASSERT3U(size, <=, EFX_RXQ_MAXNDESCS);

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_INIT_RXQ;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_INIT_RXQ_IN_LEN(npages);
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_INIT_RXQ_OUT_LEN;

        MCDI_IN_SET_DWORD(req, INIT_RXQ_IN_SIZE, size);
        MCDI_IN_SET_DWORD(req, INIT_RXQ_IN_TARGET_EVQ, target_evq);
        MCDI_IN_SET_DWORD(req, INIT_RXQ_IN_LABEL, label);
        MCDI_IN_SET_DWORD(req, INIT_RXQ_IN_INSTANCE, instance);
        MCDI_IN_POPULATE_DWORD_6(req, INIT_RXQ_IN_FLAGS,
                            INIT_RXQ_IN_FLAG_BUFF_MODE, 0,
                            INIT_RXQ_IN_FLAG_HDR_SPLIT, 0,
                            INIT_RXQ_IN_FLAG_TIMESTAMP, 0,
                            INIT_RXQ_IN_CRC_MODE, 0,
                            INIT_RXQ_IN_FLAG_PREFIX, 1,
                            INIT_RXQ_IN_FLAG_DISABLE_SCATTER, disable_scatter);
        MCDI_IN_SET_DWORD(req, INIT_RXQ_IN_OWNER_ID, 0);
        MCDI_IN_SET_DWORD(req, INIT_RXQ_IN_PORT_ID, EVB_PORT_ID_ASSIGNED);

        dma_addr = MCDI_IN2(req, efx_qword_t, INIT_RXQ_IN_DMA_ADDR);
        addr = EFSYS_MEM_ADDR(esmp);

        for (i = 0; i < npages; i++) {
                EFX_POPULATE_QWORD_2(*dma_addr,
                    EFX_DWORD_1, (uint32_t)(addr >> 32),
                    EFX_DWORD_0, (uint32_t)(addr & 0xffffffff));

                dma_addr++;
                addr += EFX_BUF_SIZE;
        }

        efx_mcdi_execute(enp, &req);

        if (req.emr_rc != 0) {
                rc = req.emr_rc;
                goto fail1;
        }

        return (0);

fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}

static  __checkReturn   efx_rc_t
efx_mcdi_fini_rxq(
        __in            efx_nic_t *enp,
        __in            uint32_t instance)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_FINI_RXQ_IN_LEN,
                            MC_CMD_FINI_RXQ_OUT_LEN)];
        efx_rc_t rc;

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_FINI_RXQ;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_FINI_RXQ_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_FINI_RXQ_OUT_LEN;

        MCDI_IN_SET_DWORD(req, FINI_RXQ_IN_INSTANCE, instance);

        efx_mcdi_execute(enp, &req);

        if ((req.emr_rc != 0) && (req.emr_rc != MC_CMD_ERR_EALREADY)) {
                rc = req.emr_rc;
                goto fail1;
        }

        return (0);

fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}

#if EFSYS_OPT_RX_SCALE
static  __checkReturn   efx_rc_t
efx_mcdi_rss_context_alloc(
        __in            efx_nic_t *enp,
        __in            efx_rx_scale_support_t scale_support,
        __in            uint32_t num_queues,
        __out           uint32_t *rss_contextp)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_ALLOC_IN_LEN,
                            MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN)];
        uint32_t rss_context;
        uint32_t context_type;
        efx_rc_t rc;

        if (num_queues > EFX_MAXRSS) {
                rc = EINVAL;
                goto fail1;
        }

        switch (scale_support) {
        case EFX_RX_SCALE_EXCLUSIVE:
                context_type = MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_EXCLUSIVE;
                break;
        case EFX_RX_SCALE_SHARED:
                context_type = MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_SHARED;
                break;
        default:
                rc = EINVAL;
                goto fail2;
        }

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_RSS_CONTEXT_ALLOC;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_RSS_CONTEXT_ALLOC_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN;

        MCDI_IN_SET_DWORD(req, RSS_CONTEXT_ALLOC_IN_UPSTREAM_PORT_ID,
            EVB_PORT_ID_ASSIGNED);
        MCDI_IN_SET_DWORD(req, RSS_CONTEXT_ALLOC_IN_TYPE, context_type);
        /* NUM_QUEUES is only used to validate indirection table offsets */
        MCDI_IN_SET_DWORD(req, RSS_CONTEXT_ALLOC_IN_NUM_QUEUES, num_queues);

        efx_mcdi_execute(enp, &req);

        if (req.emr_rc != 0) {
                rc = req.emr_rc;
                goto fail3;
        }

        if (req.emr_out_length_used < MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN) {
                rc = EMSGSIZE;
                goto fail4;
        }

        rss_context = MCDI_OUT_DWORD(req, RSS_CONTEXT_ALLOC_OUT_RSS_CONTEXT_ID);
        if (rss_context == EF10_RSS_CONTEXT_INVALID) {
                rc = ENOENT;
                goto fail5;
        }

        *rss_contextp = rss_context;

        return (0);

fail5:
        EFSYS_PROBE(fail5);
fail4:
        EFSYS_PROBE(fail4);
fail3:
        EFSYS_PROBE(fail3);
fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static                  efx_rc_t
efx_mcdi_rss_context_free(
        __in            efx_nic_t *enp,
        __in            uint32_t rss_context)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_FREE_IN_LEN,
                            MC_CMD_RSS_CONTEXT_FREE_OUT_LEN)];
        efx_rc_t rc;

        if (rss_context == EF10_RSS_CONTEXT_INVALID) {
                rc = EINVAL;
                goto fail1;
        }

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_RSS_CONTEXT_FREE;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_RSS_CONTEXT_FREE_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_RSS_CONTEXT_FREE_OUT_LEN;

        MCDI_IN_SET_DWORD(req, RSS_CONTEXT_FREE_IN_RSS_CONTEXT_ID, rss_context);

        efx_mcdi_execute(enp, &req);

        if (req.emr_rc != 0) {
                rc = req.emr_rc;
                goto fail2;
        }

        return (0);

fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static                  efx_rc_t
efx_mcdi_rss_context_set_flags(
        __in            efx_nic_t *enp,
        __in            uint32_t rss_context,
        __in            efx_rx_hash_type_t type)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_LEN,
                            MC_CMD_RSS_CONTEXT_SET_FLAGS_OUT_LEN)];
        efx_rc_t rc;

        if (rss_context == EF10_RSS_CONTEXT_INVALID) {
                rc = EINVAL;
                goto fail1;
        }

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_RSS_CONTEXT_SET_FLAGS;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_RSS_CONTEXT_SET_FLAGS_OUT_LEN;

        MCDI_IN_SET_DWORD(req, RSS_CONTEXT_SET_FLAGS_IN_RSS_CONTEXT_ID,
            rss_context);

        MCDI_IN_POPULATE_DWORD_4(req, RSS_CONTEXT_SET_FLAGS_IN_FLAGS,
            RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_IPV4_EN,
            (type & (1U << EFX_RX_HASH_IPV4)) ? 1 : 0,
            RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_TCPV4_EN,
            (type & (1U << EFX_RX_HASH_TCPIPV4)) ? 1 : 0,
            RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_IPV6_EN,
            (type & (1U << EFX_RX_HASH_IPV6)) ? 1 : 0,
            RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_TCPV6_EN,
            (type & (1U << EFX_RX_HASH_TCPIPV6)) ? 1 : 0);

        efx_mcdi_execute(enp, &req);

        if (req.emr_rc != 0) {
                rc = req.emr_rc;
                goto fail2;
        }

        return (0);

fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static                  efx_rc_t
efx_mcdi_rss_context_set_key(
        __in            efx_nic_t *enp,
        __in            uint32_t rss_context,
        __in_ecount(n)  uint8_t *key,
        __in            size_t n)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_SET_KEY_IN_LEN,
                            MC_CMD_RSS_CONTEXT_SET_KEY_OUT_LEN)];
        efx_rc_t rc;

        if (rss_context == EF10_RSS_CONTEXT_INVALID) {
                rc = EINVAL;
                goto fail1;
        }

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_RSS_CONTEXT_SET_KEY;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_RSS_CONTEXT_SET_KEY_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_RSS_CONTEXT_SET_KEY_OUT_LEN;

        MCDI_IN_SET_DWORD(req, RSS_CONTEXT_SET_KEY_IN_RSS_CONTEXT_ID,
            rss_context);

        EFSYS_ASSERT3U(n, ==, MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
        if (n != MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN) {
                rc = EINVAL;
                goto fail2;
        }

        (void) memcpy(MCDI_IN2(req, uint8_t,
            RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY), key, n);

        efx_mcdi_execute(enp, &req);

        if (req.emr_rc != 0) {
                rc = req.emr_rc;
                goto fail3;
        }

        return (0);

fail3:
        EFSYS_PROBE(fail3);
fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static                  efx_rc_t
efx_mcdi_rss_context_set_table(
        __in            efx_nic_t *enp,
        __in            uint32_t rss_context,
        __in_ecount(n)  unsigned int *table,
        __in            size_t n)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_SET_TABLE_IN_LEN,
                            MC_CMD_RSS_CONTEXT_SET_TABLE_OUT_LEN)];
        uint8_t *req_table;
        int i, rc;

        if (rss_context == EF10_RSS_CONTEXT_INVALID) {
                rc = EINVAL;
                goto fail1;
        }

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_RSS_CONTEXT_SET_TABLE;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_RSS_CONTEXT_SET_TABLE_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_RSS_CONTEXT_SET_TABLE_OUT_LEN;

        MCDI_IN_SET_DWORD(req, RSS_CONTEXT_SET_TABLE_IN_RSS_CONTEXT_ID,
            rss_context);

        req_table =
            MCDI_IN2(req, uint8_t, RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE);

        for (i = 0;
            i < MC_CMD_RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE_LEN;
            i++) {
                req_table[i] = (n > 0) ? (uint8_t)table[i % n] : 0;
        }

        efx_mcdi_execute(enp, &req);

        if (req.emr_rc != 0) {
                rc = req.emr_rc;
                goto fail2;
        }

        return (0);

fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */


        __checkReturn   efx_rc_t
ef10_rx_init(
        __in            efx_nic_t *enp)
{
#if EFSYS_OPT_RX_SCALE

        if (efx_mcdi_rss_context_alloc(enp, EFX_RX_SCALE_EXCLUSIVE, EFX_MAXRSS,
                &enp->en_rss_context) == 0) {
                /*
                 * Allocated an exclusive RSS context, which allows both the
                 * indirection table and key to be modified.
                 */
                enp->en_rss_support = EFX_RX_SCALE_EXCLUSIVE;
                enp->en_hash_support = EFX_RX_HASH_AVAILABLE;
        } else {
                /*
                 * Failed to allocate an exclusive RSS context. Continue
                 * operation without support for RSS. The pseudo-header in
                 * received packets will not contain a Toeplitz hash value.
                 */
                enp->en_rss_support = EFX_RX_SCALE_UNAVAILABLE;
                enp->en_hash_support = EFX_RX_HASH_UNAVAILABLE;
        }

#endif /* EFSYS_OPT_RX_SCALE */

        return (0);
}

#if EFSYS_OPT_RX_SCATTER
        __checkReturn   efx_rc_t
ef10_rx_scatter_enable(
        __in            efx_nic_t *enp,
        __in            unsigned int buf_size)
{
        _NOTE(ARGUNUSED(enp, buf_size))
        return (0);
}
#endif  /* EFSYS_OPT_RX_SCATTER */

#if EFSYS_OPT_RX_SCALE
        __checkReturn   efx_rc_t
ef10_rx_scale_mode_set(
        __in            efx_nic_t *enp,
        __in            efx_rx_hash_alg_t alg,
        __in            efx_rx_hash_type_t type,
        __in            boolean_t insert)
{
        efx_rc_t rc;

        EFSYS_ASSERT3U(alg, ==, EFX_RX_HASHALG_TOEPLITZ);
        EFSYS_ASSERT3U(insert, ==, B_TRUE);

        if ((alg != EFX_RX_HASHALG_TOEPLITZ) || (insert == B_FALSE)) {
                rc = EINVAL;
                goto fail1;
        }

        if (enp->en_rss_support == EFX_RX_SCALE_UNAVAILABLE) {
                rc = ENOTSUP;
                goto fail2;
        }

        if ((rc = efx_mcdi_rss_context_set_flags(enp,
                    enp->en_rss_context, type)) != 0)
                goto fail3;

        return (0);

fail3:
        EFSYS_PROBE(fail3);
fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
        __checkReturn   efx_rc_t
ef10_rx_scale_key_set(
        __in            efx_nic_t *enp,
        __in_ecount(n)  uint8_t *key,
        __in            size_t n)
{
        efx_rc_t rc;

        if (enp->en_rss_support == EFX_RX_SCALE_UNAVAILABLE) {
                rc = ENOTSUP;
                goto fail1;
        }

        if ((rc = efx_mcdi_rss_context_set_key(enp,
            enp->en_rss_context, key, n)) != 0)
                goto fail2;

        return (0);

fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
        __checkReturn   efx_rc_t
ef10_rx_scale_tbl_set(
        __in            efx_nic_t *enp,
        __in_ecount(n)  unsigned int *table,
        __in            size_t n)
{
        efx_rc_t rc;

        if (enp->en_rss_support == EFX_RX_SCALE_UNAVAILABLE) {
                rc = ENOTSUP;
                goto fail1;
        }

        if ((rc = efx_mcdi_rss_context_set_table(enp,
            enp->en_rss_context, table, n)) != 0)
                goto fail2;

        return (0);

fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */


/*
 * EF10 RX pseudo-header
 * ---------------------
 *
 * Receive packets are prefixed by an (optional) 14 byte pseudo-header:
 *
 *  +00: Toeplitz hash value.
 *       (32bit little-endian)
 *  +04: Outer VLAN tag. Zero if the packet did not have an outer VLAN tag.
 *       (16bit big-endian)
 *  +06: Inner VLAN tag. Zero if the packet did not have an inner VLAN tag.
 *       (16bit big-endian)
 *  +08: Packet Length. Zero if the RX datapath was in cut-through mode.
 *       (16bit little-endian)
 *  +10: MAC timestamp. Zero if timestamping is not enabled.
 *       (32bit little-endian)
 *
 * See "The RX Pseudo-header" in SF-109306-TC.
 */

        __checkReturn   efx_rc_t
ef10_rx_prefix_pktlen(
        __in            efx_nic_t *enp,
        __in            uint8_t *buffer,
        __out           uint16_t *lengthp)
{
        _NOTE(ARGUNUSED(enp))
        /*
         * The RX pseudo-header contains the packet length, excluding the
         * pseudo-header. If the hardware receive datapath was operating in
         * cut-through mode then the length in the RX pseudo-header will be
         * zero, and the packet length must be obtained from the DMA length
         * reported in the RX event.
         */
        *lengthp = buffer[8] | (buffer[9] << 8);
        return (0);
}

#if EFSYS_OPT_RX_SCALE
        __checkReturn   uint32_t
ef10_rx_prefix_hash(
        __in            efx_nic_t *enp,
        __in            efx_rx_hash_alg_t func,
        __in            uint8_t *buffer)
{
        _NOTE(ARGUNUSED(enp))
        switch (func) {
        case EFX_RX_HASHALG_TOEPLITZ:
                return (buffer[0] |
                    (buffer[1] << 8) |
                    (buffer[2] << 16) |
                    (buffer[3] << 24));

        default:
                EFSYS_ASSERT(0);
                return (0);
        }
}
#endif /* EFSYS_OPT_RX_SCALE */

                        void
ef10_rx_qpost(
        __in            efx_rxq_t *erp,
        __in_ecount(n)  efsys_dma_addr_t *addrp,
        __in            size_t size,
        __in            unsigned int n,
        __in            unsigned int completed,
        __in            unsigned int added)
{
        efx_qword_t qword;
        unsigned int i;
        unsigned int offset;
        unsigned int id;

        /* The client driver must not overfill the queue */
        EFSYS_ASSERT3U(added - completed + n, <=,
            EFX_RXQ_LIMIT(erp->er_mask + 1));

        id = added & (erp->er_mask);
        for (i = 0; i < n; i++) {
                EFSYS_PROBE4(rx_post, unsigned int, erp->er_index,
                    unsigned int, id, efsys_dma_addr_t, addrp[i],
                    size_t, size);

                EFX_POPULATE_QWORD_3(qword,
                    ESF_DZ_RX_KER_BYTE_CNT, (uint32_t)(size),
                    ESF_DZ_RX_KER_BUF_ADDR_DW0,
                    (uint32_t)(addrp[i] & 0xffffffff),
                    ESF_DZ_RX_KER_BUF_ADDR_DW1,
                    (uint32_t)(addrp[i] >> 32));

                offset = id * sizeof (efx_qword_t);
                EFSYS_MEM_WRITEQ(erp->er_esmp, offset, &qword);

                id = (id + 1) & (erp->er_mask);
        }
}

                        void
ef10_rx_qpush(
        __in    efx_rxq_t *erp,
        __in    unsigned int added,
        __inout unsigned int *pushedp)
{
        efx_nic_t *enp = erp->er_enp;
        unsigned int pushed = *pushedp;
        uint32_t wptr;
        efx_dword_t dword;

        /* Hardware has alignment restriction for WPTR */
        wptr = P2ALIGN(added, EF10_RX_WPTR_ALIGN);
        if (pushed == wptr)
                return;

        *pushedp = wptr;

        /* Push the populated descriptors out */
        wptr &= erp->er_mask;

        EFX_POPULATE_DWORD_1(dword, ERF_DZ_RX_DESC_WPTR, wptr);

        /* Guarantee ordering of memory (descriptors) and PIO (doorbell) */
        EFX_DMA_SYNC_QUEUE_FOR_DEVICE(erp->er_esmp, erp->er_mask + 1,
            wptr, pushed & erp->er_mask);
        EFSYS_PIO_WRITE_BARRIER();
        EFX_BAR_TBL_WRITED(enp, ER_DZ_RX_DESC_UPD_REG,
                            erp->er_index, &dword, B_FALSE);
}

        __checkReturn   efx_rc_t
ef10_rx_qflush(
        __in    efx_rxq_t *erp)
{
        efx_nic_t *enp = erp->er_enp;
        efx_rc_t rc;

        if ((rc = efx_mcdi_fini_rxq(enp, erp->er_index)) != 0)
                goto fail1;

        return (0);

fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}

                void
ef10_rx_qenable(
        __in    efx_rxq_t *erp)
{
        /* FIXME */
        _NOTE(ARGUNUSED(erp))
        /* FIXME */
}

        __checkReturn   efx_rc_t
ef10_rx_qcreate(
        __in            efx_nic_t *enp,
        __in            unsigned int index,
        __in            unsigned int label,
        __in            efx_rxq_type_t type,
        __in            efsys_mem_t *esmp,
        __in            size_t n,
        __in            uint32_t id,
        __in            efx_evq_t *eep,
        __in            efx_rxq_t *erp)
{
        efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
        efx_rc_t rc;
        boolean_t disable_scatter;

        _NOTE(ARGUNUSED(erp, id))

        EFX_STATIC_ASSERT(EFX_EV_RX_NLABELS == (1 << ESF_DZ_RX_QLABEL_WIDTH));
        EFSYS_ASSERT3U(label, <, EFX_EV_RX_NLABELS);
        EFSYS_ASSERT3U(enp->en_rx_qcount + 1, <, encp->enc_rxq_limit);

        EFX_STATIC_ASSERT(ISP2(EFX_RXQ_MAXNDESCS));
        EFX_STATIC_ASSERT(ISP2(EFX_RXQ_MINNDESCS));

        if (!ISP2(n) || (n < EFX_RXQ_MINNDESCS) || (n > EFX_RXQ_MAXNDESCS)) {
                rc = EINVAL;
                goto fail1;
        }
        if (index >= encp->enc_rxq_limit) {
                rc = EINVAL;
                goto fail2;
        }

        /* Scatter can only be disabled if the firmware supports doing so */
        if ((type != EFX_RXQ_TYPE_SCATTER) &&
            enp->en_nic_cfg.enc_rx_disable_scatter_supported) {
                disable_scatter = B_TRUE;
        } else {
                disable_scatter = B_FALSE;
        }

        if ((rc = efx_mcdi_init_rxq(enp, n, eep->ee_index, label, index,
            esmp, disable_scatter)) != 0)
                goto fail3;

        erp->er_eep = eep;
        erp->er_label = label;

        ef10_ev_rxlabel_init(eep, erp, label);

        return (0);

fail3:
        EFSYS_PROBE(fail3);
fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}

                void
ef10_rx_qdestroy(
        __in    efx_rxq_t *erp)
{
        efx_nic_t *enp = erp->er_enp;
        efx_evq_t *eep = erp->er_eep;
        unsigned int label = erp->er_label;

        ef10_ev_rxlabel_fini(eep, label);

        EFSYS_ASSERT(enp->en_rx_qcount != 0);
        --enp->en_rx_qcount;

        EFSYS_KMEM_FREE(enp->en_esip, sizeof (efx_rxq_t), erp);
}

                void
ef10_rx_fini(
        __in    efx_nic_t *enp)
{
#if EFSYS_OPT_RX_SCALE
        if (enp->en_rss_support != EFX_RX_SCALE_UNAVAILABLE) {
                (void) efx_mcdi_rss_context_free(enp, enp->en_rss_context);
        }
        enp->en_rss_context = 0;
        enp->en_rss_support = EFX_RX_SCALE_UNAVAILABLE;
#else
        _NOTE(ARGUNUSED(enp))
#endif /* EFSYS_OPT_RX_SCALE */
}

#endif /* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD */