/*
 * 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_MON_STATS
#include "mcdi_mon.h"
#endif

#if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD

#if EFSYS_OPT_QSTATS
#define EFX_EV_QSTAT_INCR(_eep, _stat)                                  \
        do {                                                            \
                (_eep)->ee_stat[_stat]++;                               \
        _NOTE(CONSTANTCONDITION)                                        \
        } while (B_FALSE)
#else
#define EFX_EV_QSTAT_INCR(_eep, _stat)
#endif


static  __checkReturn   boolean_t
ef10_ev_rx(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg);

static  __checkReturn   boolean_t
ef10_ev_tx(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg);

static  __checkReturn   boolean_t
ef10_ev_driver(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg);

static  __checkReturn   boolean_t
ef10_ev_drv_gen(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg);

static  __checkReturn   boolean_t
ef10_ev_mcdi(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg);


static  __checkReturn   efx_rc_t
efx_mcdi_init_evq(
        __in            efx_nic_t *enp,
        __in            unsigned int instance,
        __in            efsys_mem_t *esmp,
        __in            size_t nevs,
        __in            uint32_t irq,
        __out_opt       uint32_t *irqp)
{
        efx_mcdi_req_t req;
        uint8_t payload[
            MAX(MC_CMD_INIT_EVQ_IN_LEN(EFX_EVQ_NBUFS(EFX_EVQ_MAXNEVS)),
                MC_CMD_INIT_EVQ_OUT_LEN)];
        efx_qword_t *dma_addr;
        uint64_t addr;
        int npages;
        int i;
        int supports_rx_batching;
        efx_rc_t rc;

        npages = EFX_EVQ_NBUFS(nevs);
        if (MC_CMD_INIT_EVQ_IN_LEN(npages) > MC_CMD_INIT_EVQ_IN_LENMAX) {
                rc = EINVAL;
                goto fail1;
        }

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_INIT_EVQ;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_INIT_EVQ_IN_LEN(npages);
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_INIT_EVQ_OUT_LEN;

        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_SIZE, nevs);
        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_INSTANCE, instance);
        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_IRQ_NUM, irq);

        /*
         * On Huntington RX and TX event batching can only be requested
         * together (even if the datapath firmware doesn't actually support RX
         * batching).
         * Cut through is incompatible with RX batching and so enabling cut
         * through disables RX batching (but it does not affect TX batching).
         *
         * So always enable RX and TX event batching, and enable cut through
         * if RX event batching isn't supported (i.e. on low latency firmware).
         */
        supports_rx_batching = enp->en_nic_cfg.enc_rx_batching_enabled ? 1 : 0;
        MCDI_IN_POPULATE_DWORD_6(req, INIT_EVQ_IN_FLAGS,
            INIT_EVQ_IN_FLAG_INTERRUPTING, 1,
            INIT_EVQ_IN_FLAG_RPTR_DOS, 0,
            INIT_EVQ_IN_FLAG_INT_ARMD, 0,
            INIT_EVQ_IN_FLAG_CUT_THRU, !supports_rx_batching,
            INIT_EVQ_IN_FLAG_RX_MERGE, 1,
            INIT_EVQ_IN_FLAG_TX_MERGE, 1);

        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_TMR_MODE,
            MC_CMD_INIT_EVQ_IN_TMR_MODE_DIS);
        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_TMR_LOAD, 0);
        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_TMR_RELOAD, 0);

        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_COUNT_MODE,
            MC_CMD_INIT_EVQ_IN_COUNT_MODE_DIS);
        MCDI_IN_SET_DWORD(req, INIT_EVQ_IN_COUNT_THRSHLD, 0);

        dma_addr = MCDI_IN2(req, efx_qword_t, INIT_EVQ_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 fail2;
        }

        if (req.emr_out_length_used < MC_CMD_INIT_EVQ_OUT_LEN) {
                rc = EMSGSIZE;
                goto fail3;
        }

        if (irqp != NULL)
                *irqp = MCDI_OUT_DWORD(req, INIT_EVQ_OUT_IRQ);

        return (0);

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

        return (rc);
}

static  __checkReturn   efx_rc_t
efx_mcdi_fini_evq(
        __in            efx_nic_t *enp,
        __in            uint32_t instance)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_FINI_EVQ_IN_LEN,
                            MC_CMD_FINI_EVQ_OUT_LEN)];
        efx_rc_t rc;

        (void) memset(payload, 0, sizeof (payload));
        req.emr_cmd = MC_CMD_FINI_EVQ;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_FINI_EVQ_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_FINI_EVQ_OUT_LEN;

        MCDI_IN_SET_DWORD(req, FINI_EVQ_IN_INSTANCE, instance);

        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);
}



        __checkReturn   efx_rc_t
ef10_ev_init(
        __in            efx_nic_t *enp)
{
        _NOTE(ARGUNUSED(enp))
        return (0);
}

                        void
ef10_ev_fini(
        __in            efx_nic_t *enp)
{
        _NOTE(ARGUNUSED(enp))
}

        __checkReturn   efx_rc_t
ef10_ev_qcreate(
        __in            efx_nic_t *enp,
        __in            unsigned int index,
        __in            efsys_mem_t *esmp,
        __in            size_t n,
        __in            uint32_t id,
        __in            efx_evq_t *eep)
{
        efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
        uint32_t irq;
        efx_rc_t rc;

        _NOTE(ARGUNUSED(id))    /* buftbl id managed by MC */
        EFX_STATIC_ASSERT(ISP2(EFX_EVQ_MAXNEVS));
        EFX_STATIC_ASSERT(ISP2(EFX_EVQ_MINNEVS));

        if (!ISP2(n) || (n < EFX_EVQ_MINNEVS) || (n > EFX_EVQ_MAXNEVS)) {
                rc = EINVAL;
                goto fail1;
        }

        if (index >= encp->enc_evq_limit) {
                rc = EINVAL;
                goto fail2;
        }

        /* Set up the handler table */
        eep->ee_rx      = ef10_ev_rx;
        eep->ee_tx      = ef10_ev_tx;
        eep->ee_driver  = ef10_ev_driver;
        eep->ee_drv_gen = ef10_ev_drv_gen;
        eep->ee_mcdi    = ef10_ev_mcdi;

        /*
         * Set up the event queue
         * NOTE: ignore the returned IRQ param as firmware does not set it.
         */
        irq = index;    /* INIT_EVQ expects function-relative vector number */
        if ((rc = efx_mcdi_init_evq(enp, index, esmp, n, irq, NULL)) != 0)
                goto fail3;

        return (0);

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

        return (rc);
}

                        void
ef10_ev_qdestroy(
        __in            efx_evq_t *eep)
{
        efx_nic_t *enp = eep->ee_enp;

        EFSYS_ASSERT(enp->en_family == EFX_FAMILY_HUNTINGTON ||
            enp->en_family == EFX_FAMILY_MEDFORD);

        (void) efx_mcdi_fini_evq(eep->ee_enp, eep->ee_index);
}

        __checkReturn   efx_rc_t
ef10_ev_qprime(
        __in            efx_evq_t *eep,
        __in            unsigned int count)
{
        efx_nic_t *enp = eep->ee_enp;
        uint32_t rptr;
        efx_dword_t dword;

        rptr = count & eep->ee_mask;

        if (enp->en_nic_cfg.enc_bug35388_workaround) {
                EFX_STATIC_ASSERT(EFX_EVQ_MINNEVS >
                    (1 << ERF_DD_EVQ_IND_RPTR_WIDTH));
                EFX_STATIC_ASSERT(EFX_EVQ_MAXNEVS <
                    (1 << 2 * ERF_DD_EVQ_IND_RPTR_WIDTH));

                EFX_POPULATE_DWORD_2(dword,
                    ERF_DD_EVQ_IND_RPTR_FLAGS,
                    EFE_DD_EVQ_IND_RPTR_FLAGS_HIGH,
                    ERF_DD_EVQ_IND_RPTR,
                    (rptr >> ERF_DD_EVQ_IND_RPTR_WIDTH));
                EFX_BAR_TBL_WRITED(enp, ER_DD_EVQ_INDIRECT, eep->ee_index,
                    &dword, B_FALSE);

                EFX_POPULATE_DWORD_2(dword,
                    ERF_DD_EVQ_IND_RPTR_FLAGS,
                    EFE_DD_EVQ_IND_RPTR_FLAGS_LOW,
                    ERF_DD_EVQ_IND_RPTR,
                    rptr & ((1 << ERF_DD_EVQ_IND_RPTR_WIDTH) - 1));
                EFX_BAR_TBL_WRITED(enp, ER_DD_EVQ_INDIRECT, eep->ee_index,
                    &dword, B_FALSE);
        } else {
                EFX_POPULATE_DWORD_1(dword, ERF_DZ_EVQ_RPTR, rptr);
                EFX_BAR_TBL_WRITED(enp, ER_DZ_EVQ_RPTR_REG, eep->ee_index,
                    &dword, B_FALSE);
        }

        return (0);
}

static  __checkReturn   efx_rc_t
efx_mcdi_driver_event(
        __in            efx_nic_t *enp,
        __in            uint32_t evq,
        __in            efx_qword_t data)
{
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_DRIVER_EVENT_IN_LEN,
                            MC_CMD_DRIVER_EVENT_OUT_LEN)];
        efx_rc_t rc;

        req.emr_cmd = MC_CMD_DRIVER_EVENT;
        req.emr_in_buf = payload;
        req.emr_in_length = MC_CMD_DRIVER_EVENT_IN_LEN;
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_DRIVER_EVENT_OUT_LEN;

        MCDI_IN_SET_DWORD(req, DRIVER_EVENT_IN_EVQ, evq);

        MCDI_IN_SET_DWORD(req, DRIVER_EVENT_IN_DATA_LO,
            EFX_QWORD_FIELD(data, EFX_DWORD_0));
        MCDI_IN_SET_DWORD(req, DRIVER_EVENT_IN_DATA_HI,
            EFX_QWORD_FIELD(data, EFX_DWORD_1));

        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);
}

                        void
ef10_ev_qpost(
        __in    efx_evq_t *eep,
        __in    uint16_t data)
{
        efx_nic_t *enp = eep->ee_enp;
        efx_qword_t event;

        EFX_POPULATE_QWORD_3(event,
            ESF_DZ_DRV_CODE, ESE_DZ_EV_CODE_DRV_GEN_EV,
            ESF_DZ_DRV_SUB_CODE, 0,
            ESF_DZ_DRV_SUB_DATA_DW0, (uint32_t)data);

        (void) efx_mcdi_driver_event(enp, eep->ee_index, event);
}

        __checkReturn   efx_rc_t
ef10_ev_qmoderate(
        __in            efx_evq_t *eep,
        __in            unsigned int us)
{
        efx_nic_t *enp = eep->ee_enp;
        efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
        efx_dword_t dword;
        uint32_t timer_val, mode;
        efx_rc_t rc;

        if (us > encp->enc_evq_timer_max_us) {
                rc = EINVAL;
                goto fail1;
        }

        /* If the value is zero then disable the timer */
        if (us == 0) {
                timer_val = 0;
                mode = FFE_CZ_TIMER_MODE_DIS;
        } else {
                /* Calculate the timer value in quanta */
                timer_val = us * 1000 / encp->enc_evq_timer_quantum_ns;

                /* Moderation value is base 0 so we need to deduct 1 */
                if (timer_val > 0)
                        timer_val--;

                mode = FFE_CZ_TIMER_MODE_INT_HLDOFF;
        }

        if (encp->enc_bug35388_workaround) {
                EFX_POPULATE_DWORD_3(dword,
                    ERF_DD_EVQ_IND_TIMER_FLAGS,
                    EFE_DD_EVQ_IND_TIMER_FLAGS,
                    ERF_DD_EVQ_IND_TIMER_MODE, mode,
                    ERF_DD_EVQ_IND_TIMER_VAL, timer_val);
                EFX_BAR_TBL_WRITED(enp, ER_DD_EVQ_INDIRECT,
                    eep->ee_index, &dword, 0);
        } else {
                EFX_POPULATE_DWORD_2(dword,
                    ERF_DZ_TC_TIMER_MODE, mode,
                    ERF_DZ_TC_TIMER_VAL, timer_val);
                EFX_BAR_TBL_WRITED(enp, ER_DZ_EVQ_TMR_REG,
                    eep->ee_index, &dword, 0);
        }

        return (0);

fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}


#if EFSYS_OPT_QSTATS
                        void
ef10_ev_qstats_update(
        __in                            efx_evq_t *eep,
        __inout_ecount(EV_NQSTATS)      efsys_stat_t *stat)
{
        unsigned int id;

        for (id = 0; id < EV_NQSTATS; id++) {
                efsys_stat_t *essp = &stat[id];

                EFSYS_STAT_INCR(essp, eep->ee_stat[id]);
                eep->ee_stat[id] = 0;
        }
}
#endif /* EFSYS_OPT_QSTATS */


static  __checkReturn   boolean_t
ef10_ev_rx(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        efx_nic_t *enp = eep->ee_enp;
        uint32_t size;
        uint32_t label;
        uint32_t mac_class;
        uint32_t eth_tag_class;
        uint32_t l3_class;
        uint32_t l4_class;
        uint32_t next_read_lbits;
        uint16_t flags;
        boolean_t cont;
        boolean_t should_abort;
        efx_evq_rxq_state_t *eersp;
        unsigned int desc_count;
        unsigned int last_used_id;

        EFX_EV_QSTAT_INCR(eep, EV_RX);

        /* Discard events after RXQ/TXQ errors */
        if (enp->en_reset_flags & (EFX_RESET_RXQ_ERR | EFX_RESET_TXQ_ERR))
                return (B_FALSE);

        /* Basic packet information */
        size = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_BYTES);
        next_read_lbits = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_DSC_PTR_LBITS);
        label = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_QLABEL);
        eth_tag_class = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_ETH_TAG_CLASS);
        mac_class = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_MAC_CLASS);
        l3_class = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_L3_CLASS);
        l4_class = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_L4_CLASS);
        cont = EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_CONT);

        if (EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_DROP_EVENT) != 0) {
                /* Drop this event */
                return (B_FALSE);
        }
        flags = 0;

        if (cont != 0) {
                /*
                 * This may be part of a scattered frame, or it may be a
                 * truncated frame if scatter is disabled on this RXQ.
                 * Overlength frames can be received if e.g. a VF is configured
                 * for 1500 MTU but connected to a port set to 9000 MTU
                 * (see bug56567).
                 * FIXME: There is not yet any driver that supports scatter on
                 * Huntington.  Scatter support is required for OSX.
                 */
                flags |= EFX_PKT_CONT;
        }

        if (mac_class == ESE_DZ_MAC_CLASS_UCAST)
                flags |= EFX_PKT_UNICAST;

        /* Increment the count of descriptors read */
        eersp = &eep->ee_rxq_state[label];
        desc_count = (next_read_lbits - eersp->eers_rx_read_ptr) &
            EFX_MASK32(ESF_DZ_RX_DSC_PTR_LBITS);
        eersp->eers_rx_read_ptr += desc_count;

        /*
         * FIXME: add error checking to make sure this a batched event.
         * This could also be an aborted scatter, see Bug36629.
         */
        if (desc_count > 1) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_BATCH);
                flags |= EFX_PKT_PREFIX_LEN;
        }

        /* Calculate the index of the the last descriptor consumed */
        last_used_id = (eersp->eers_rx_read_ptr - 1) & eersp->eers_rx_mask;

        /* Check for errors that invalidate checksum and L3/L4 fields */
        if (EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_ECC_ERR) != 0) {
                /* RX frame truncated (error flag is misnamed) */
                EFX_EV_QSTAT_INCR(eep, EV_RX_FRM_TRUNC);
                flags |= EFX_DISCARD;
                goto deliver;
        }
        if (EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_ECRC_ERR) != 0) {
                /* Bad Ethernet frame CRC */
                EFX_EV_QSTAT_INCR(eep, EV_RX_ETH_CRC_ERR);
                flags |= EFX_DISCARD;
                goto deliver;
        }
        if (EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_PARSE_INCOMPLETE)) {
                /*
                 * Hardware parse failed, due to malformed headers
                 * or headers that are too long for the parser.
                 * Headers and checksums must be validated by the host.
                 */
                // TODO: EFX_EV_QSTAT_INCR(eep, EV_RX_PARSE_INCOMPLETE);
                goto deliver;
        }

        if ((eth_tag_class == ESE_DZ_ETH_TAG_CLASS_VLAN1) ||
            (eth_tag_class == ESE_DZ_ETH_TAG_CLASS_VLAN2)) {
                flags |= EFX_PKT_VLAN_TAGGED;
        }

        switch (l3_class) {
        case ESE_DZ_L3_CLASS_IP4:
        case ESE_DZ_L3_CLASS_IP4_FRAG:
                flags |= EFX_PKT_IPV4;
                if (EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_IPCKSUM_ERR)) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_IPV4_HDR_CHKSUM_ERR);
                } else {
                        flags |= EFX_CKSUM_IPV4;
                }

                if (l4_class == ESE_DZ_L4_CLASS_TCP) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_TCP_IPV4);
                        flags |= EFX_PKT_TCP;
                } else if (l4_class == ESE_DZ_L4_CLASS_UDP) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_UDP_IPV4);
                        flags |= EFX_PKT_UDP;
                } else {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_OTHER_IPV4);
                }
                break;

        case ESE_DZ_L3_CLASS_IP6:
        case ESE_DZ_L3_CLASS_IP6_FRAG:
                flags |= EFX_PKT_IPV6;

                if (l4_class == ESE_DZ_L4_CLASS_TCP) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_TCP_IPV6);
                        flags |= EFX_PKT_TCP;
                } else if (l4_class == ESE_DZ_L4_CLASS_UDP) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_UDP_IPV6);
                        flags |= EFX_PKT_UDP;
                } else {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_OTHER_IPV6);
                }
                break;

        default:
                EFX_EV_QSTAT_INCR(eep, EV_RX_NON_IP);
                break;
        }

        if (flags & (EFX_PKT_TCP | EFX_PKT_UDP)) {
                if (EFX_QWORD_FIELD(*eqp, ESF_DZ_RX_TCPUDP_CKSUM_ERR)) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_TCP_UDP_CHKSUM_ERR);
                } else {
                        flags |= EFX_CKSUM_TCPUDP;
                }
        }

deliver:
        /* If we're not discarding the packet then it is ok */
        if (~flags & EFX_DISCARD)
                EFX_EV_QSTAT_INCR(eep, EV_RX_OK);

        EFSYS_ASSERT(eecp->eec_rx != NULL);
        should_abort = eecp->eec_rx(arg, label, last_used_id, size, flags);

        return (should_abort);
}

static  __checkReturn   boolean_t
ef10_ev_tx(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        efx_nic_t *enp = eep->ee_enp;
        uint32_t id;
        uint32_t label;
        boolean_t should_abort;

        EFX_EV_QSTAT_INCR(eep, EV_TX);

        /* Discard events after RXQ/TXQ errors */
        if (enp->en_reset_flags & (EFX_RESET_RXQ_ERR | EFX_RESET_TXQ_ERR))
                return (B_FALSE);

        if (EFX_QWORD_FIELD(*eqp, ESF_DZ_TX_DROP_EVENT) != 0) {
                /* Drop this event */
                return (B_FALSE);
        }

        /* Per-packet TX completion (was per-descriptor for Falcon/Siena) */
        id = EFX_QWORD_FIELD(*eqp, ESF_DZ_TX_DESCR_INDX);
        label = EFX_QWORD_FIELD(*eqp, ESF_DZ_TX_QLABEL);

        EFSYS_PROBE2(tx_complete, uint32_t, label, uint32_t, id);

        EFSYS_ASSERT(eecp->eec_tx != NULL);
        should_abort = eecp->eec_tx(arg, label, id);

        return (should_abort);
}

static  __checkReturn   boolean_t
ef10_ev_driver(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        unsigned int code;
        boolean_t should_abort;

        EFX_EV_QSTAT_INCR(eep, EV_DRIVER);
        should_abort = B_FALSE;

        code = EFX_QWORD_FIELD(*eqp, ESF_DZ_DRV_SUB_CODE);
        switch (code) {
        case ESE_DZ_DRV_TIMER_EV: {
                uint32_t id;

                id = EFX_QWORD_FIELD(*eqp, ESF_DZ_DRV_TMR_ID);

                EFSYS_ASSERT(eecp->eec_timer != NULL);
                should_abort = eecp->eec_timer(arg, id);
                break;
        }

        case ESE_DZ_DRV_WAKE_UP_EV: {
                uint32_t id;

                id = EFX_QWORD_FIELD(*eqp, ESF_DZ_DRV_EVQ_ID);

                EFSYS_ASSERT(eecp->eec_wake_up != NULL);
                should_abort = eecp->eec_wake_up(arg, id);
                break;
        }

        case ESE_DZ_DRV_START_UP_EV:
                EFSYS_ASSERT(eecp->eec_initialized != NULL);
                should_abort = eecp->eec_initialized(arg);
                break;

        default:
                EFSYS_PROBE3(bad_event, unsigned int, eep->ee_index,
                    uint32_t, EFX_QWORD_FIELD(*eqp, EFX_DWORD_1),
                    uint32_t, EFX_QWORD_FIELD(*eqp, EFX_DWORD_0));
                break;
        }

        return (should_abort);
}

static  __checkReturn   boolean_t
ef10_ev_drv_gen(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        uint32_t data;
        boolean_t should_abort;

        EFX_EV_QSTAT_INCR(eep, EV_DRV_GEN);
        should_abort = B_FALSE;

        data = EFX_QWORD_FIELD(*eqp, ESF_DZ_DRV_SUB_DATA_DW0);
        if (data >= ((uint32_t)1 << 16)) {
                EFSYS_PROBE3(bad_event, unsigned int, eep->ee_index,
                    uint32_t, EFX_QWORD_FIELD(*eqp, EFX_DWORD_1),
                    uint32_t, EFX_QWORD_FIELD(*eqp, EFX_DWORD_0));

                return (B_TRUE);
        }

        EFSYS_ASSERT(eecp->eec_software != NULL);
        should_abort = eecp->eec_software(arg, (uint16_t)data);

        return (should_abort);
}

static  __checkReturn   boolean_t
ef10_ev_mcdi(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        efx_nic_t *enp = eep->ee_enp;
        unsigned code;
        boolean_t should_abort = B_FALSE;

        EFX_EV_QSTAT_INCR(eep, EV_MCDI_RESPONSE);

        code = EFX_QWORD_FIELD(*eqp, MCDI_EVENT_CODE);
        switch (code) {
        case MCDI_EVENT_CODE_BADSSERT:
                efx_mcdi_ev_death(enp, EINTR);
                break;

        case MCDI_EVENT_CODE_CMDDONE:
                efx_mcdi_ev_cpl(enp,
                    MCDI_EV_FIELD(eqp, CMDDONE_SEQ),
                    MCDI_EV_FIELD(eqp, CMDDONE_DATALEN),
                    MCDI_EV_FIELD(eqp, CMDDONE_ERRNO));
                break;

#if EFSYS_OPT_MCDI_PROXY_AUTH
        case MCDI_EVENT_CODE_PROXY_RESPONSE:
                /*
                 * This event notifies a function that an authorization request
                 * has been processed. If the request was authorized then the
                 * function can now re-send the original MCDI request.
                 * See SF-113652-SW "SR-IOV Proxied Network Access Control".
                 */
                efx_mcdi_ev_proxy_response(enp,
                    MCDI_EV_FIELD(eqp, PROXY_RESPONSE_HANDLE),
                    MCDI_EV_FIELD(eqp, PROXY_RESPONSE_RC));
                break;
#endif /* EFSYS_OPT_MCDI_PROXY_AUTH */

        case MCDI_EVENT_CODE_LINKCHANGE: {
                efx_link_mode_t link_mode;

                ef10_phy_link_ev(enp, eqp, &link_mode);
                should_abort = eecp->eec_link_change(arg, link_mode);
                break;
        }

        case MCDI_EVENT_CODE_SENSOREVT: {
#if EFSYS_OPT_MON_STATS
                efx_mon_stat_t id;
                efx_mon_stat_value_t value;
                efx_rc_t rc;

                /* Decode monitor stat for MCDI sensor (if supported) */
                if ((rc = mcdi_mon_ev(enp, eqp, &id, &value)) == 0) {
                        /* Report monitor stat change */
                        should_abort = eecp->eec_monitor(arg, id, value);
                } else if (rc == ENOTSUP) {
                        should_abort = eecp->eec_exception(arg,
                                EFX_EXCEPTION_UNKNOWN_SENSOREVT,
                                MCDI_EV_FIELD(eqp, DATA));
                } else {
                        EFSYS_ASSERT(rc == ENODEV);     /* Wrong port */
                }
#endif
                break;
        }

        case MCDI_EVENT_CODE_SCHEDERR:
                /* Informational only */
                break;

        case MCDI_EVENT_CODE_REBOOT:
                /* Falcon/Siena only (should not been seen with Huntington). */
                efx_mcdi_ev_death(enp, EIO);
                break;

        case MCDI_EVENT_CODE_MC_REBOOT:
                /* MC_REBOOT event is used for Huntington (EF10) and later. */
                efx_mcdi_ev_death(enp, EIO);
                break;

        case MCDI_EVENT_CODE_MAC_STATS_DMA:
#if EFSYS_OPT_MAC_STATS
                if (eecp->eec_mac_stats != NULL) {
                        eecp->eec_mac_stats(arg,
                            MCDI_EV_FIELD(eqp, MAC_STATS_DMA_GENERATION));
                }
#endif
                break;

        case MCDI_EVENT_CODE_FWALERT: {
                uint32_t reason = MCDI_EV_FIELD(eqp, FWALERT_REASON);

                if (reason == MCDI_EVENT_FWALERT_REASON_SRAM_ACCESS)
                        should_abort = eecp->eec_exception(arg,
                                EFX_EXCEPTION_FWALERT_SRAM,
                                MCDI_EV_FIELD(eqp, FWALERT_DATA));
                else
                        should_abort = eecp->eec_exception(arg,
                                EFX_EXCEPTION_UNKNOWN_FWALERT,
                                MCDI_EV_FIELD(eqp, DATA));
                break;
        }

        case MCDI_EVENT_CODE_TX_ERR: {
                /*
                 * After a TXQ error is detected, firmware sends a TX_ERR event.
                 * This may be followed by TX completions (which we discard),
                 * and then finally by a TX_FLUSH event. Firmware destroys the
                 * TXQ automatically after sending the TX_FLUSH event.
                 */
                enp->en_reset_flags |= EFX_RESET_TXQ_ERR;

                EFSYS_PROBE1(tx_descq_err, uint32_t, MCDI_EV_FIELD(eqp, DATA));

                /* Inform the driver that a reset is required. */
                eecp->eec_exception(arg, EFX_EXCEPTION_TX_ERROR,
                    MCDI_EV_FIELD(eqp, TX_ERR_DATA));
                break;
        }

        case MCDI_EVENT_CODE_TX_FLUSH: {
                uint32_t txq_index = MCDI_EV_FIELD(eqp, TX_FLUSH_TXQ);

                /*
                 * EF10 firmware sends two TX_FLUSH events: one to the txq's
                 * event queue, and one to evq 0 (with TX_FLUSH_TO_DRIVER set).
                 * We want to wait for all completions, so ignore the events
                 * with TX_FLUSH_TO_DRIVER.
                 */
                if (MCDI_EV_FIELD(eqp, TX_FLUSH_TO_DRIVER) != 0) {
                        should_abort = B_FALSE;
                        break;
                }

                EFX_EV_QSTAT_INCR(eep, EV_DRIVER_TX_DESCQ_FLS_DONE);

                EFSYS_PROBE1(tx_descq_fls_done, uint32_t, txq_index);

                EFSYS_ASSERT(eecp->eec_txq_flush_done != NULL);
                should_abort = eecp->eec_txq_flush_done(arg, txq_index);
                break;
        }

        case MCDI_EVENT_CODE_RX_ERR: {
                /*
                 * After an RXQ error is detected, firmware sends an RX_ERR
                 * event. This may be followed by RX events (which we discard),
                 * and then finally by an RX_FLUSH event. Firmware destroys the
                 * RXQ automatically after sending the RX_FLUSH event.
                 */
                enp->en_reset_flags |= EFX_RESET_RXQ_ERR;

                EFSYS_PROBE1(rx_descq_err, uint32_t, MCDI_EV_FIELD(eqp, DATA));

                /* Inform the driver that a reset is required. */
                eecp->eec_exception(arg, EFX_EXCEPTION_RX_ERROR,
                    MCDI_EV_FIELD(eqp, RX_ERR_DATA));
                break;
        }

        case MCDI_EVENT_CODE_RX_FLUSH: {
                uint32_t rxq_index = MCDI_EV_FIELD(eqp, RX_FLUSH_RXQ);

                /*
                 * EF10 firmware sends two RX_FLUSH events: one to the rxq's
                 * event queue, and one to evq 0 (with RX_FLUSH_TO_DRIVER set).
                 * We want to wait for all completions, so ignore the events
                 * with RX_FLUSH_TO_DRIVER.
                 */
                if (MCDI_EV_FIELD(eqp, RX_FLUSH_TO_DRIVER) != 0) {
                        should_abort = B_FALSE;
                        break;
                }

                EFX_EV_QSTAT_INCR(eep, EV_DRIVER_RX_DESCQ_FLS_DONE);

                EFSYS_PROBE1(rx_descq_fls_done, uint32_t, rxq_index);

                EFSYS_ASSERT(eecp->eec_rxq_flush_done != NULL);
                should_abort = eecp->eec_rxq_flush_done(arg, rxq_index);
                break;
        }

        default:
                EFSYS_PROBE3(bad_event, unsigned int, eep->ee_index,
                    uint32_t, EFX_QWORD_FIELD(*eqp, EFX_DWORD_1),
                    uint32_t, EFX_QWORD_FIELD(*eqp, EFX_DWORD_0));
                break;
        }

        return (should_abort);
}

                void
ef10_ev_rxlabel_init(
        __in            efx_evq_t *eep,
        __in            efx_rxq_t *erp,
        __in            unsigned int label)
{
        efx_evq_rxq_state_t *eersp;

        EFSYS_ASSERT3U(label, <, EFX_ARRAY_SIZE(eep->ee_rxq_state));
        eersp = &eep->ee_rxq_state[label];

        EFSYS_ASSERT3U(eersp->eers_rx_mask, ==, 0);

        eersp->eers_rx_read_ptr = 0;
        eersp->eers_rx_mask = erp->er_mask;
}

                void
ef10_ev_rxlabel_fini(
        __in            efx_evq_t *eep,
        __in            unsigned int label)
{
        efx_evq_rxq_state_t *eersp;

        EFSYS_ASSERT3U(label, <, EFX_ARRAY_SIZE(eep->ee_rxq_state));
        eersp = &eep->ee_rxq_state[label];

        EFSYS_ASSERT3U(eersp->eers_rx_mask, !=, 0);

        eersp->eers_rx_read_ptr = 0;
        eersp->eers_rx_mask = 0;
}

#endif  /* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD */