/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2007-2016 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 <sys/cdefs.h>
#include "efx.h"
#include "efx_impl.h"
#if EFSYS_OPT_MON_MCDI
#include "mcdi_mon.h"
#endif

#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

#define EFX_EV_PRESENT(_qword)                                          \
        (EFX_QWORD_FIELD((_qword), EFX_DWORD_0) != 0xffffffff &&        \
        EFX_QWORD_FIELD((_qword), EFX_DWORD_1) != 0xffffffff)

#if EFSYS_OPT_SIENA

static  __checkReturn   efx_rc_t
siena_ev_init(
        __in            efx_nic_t *enp);

static                  void
siena_ev_fini(
        __in            efx_nic_t *enp);

static  __checkReturn   efx_rc_t
siena_ev_qcreate(
        __in            efx_nic_t *enp,
        __in            unsigned int index,
        __in            efsys_mem_t *esmp,
        __in            size_t ndescs,
        __in            uint32_t id,
        __in            uint32_t us,
        __in            uint32_t flags,
        __in            efx_evq_t *eep);

static                  void
siena_ev_qdestroy(
        __in            efx_evq_t *eep);

static  __checkReturn   efx_rc_t
siena_ev_qprime(
        __in            efx_evq_t *eep,
        __in            unsigned int count);

static                  void
siena_ev_qpost(
        __in    efx_evq_t *eep,
        __in    uint16_t data);

static  __checkReturn   efx_rc_t
siena_ev_qmoderate(
        __in            efx_evq_t *eep,
        __in            unsigned int us);

#if EFSYS_OPT_QSTATS
static                  void
siena_ev_qstats_update(
        __in                            efx_evq_t *eep,
        __inout_ecount(EV_NQSTATS)      efsys_stat_t *stat);

#endif

#endif /* EFSYS_OPT_SIENA */

#if EFSYS_OPT_SIENA
static const efx_ev_ops_t       __efx_ev_siena_ops = {
        siena_ev_init,                          /* eevo_init */
        siena_ev_fini,                          /* eevo_fini */
        siena_ev_qcreate,                       /* eevo_qcreate */
        siena_ev_qdestroy,                      /* eevo_qdestroy */
        siena_ev_qprime,                        /* eevo_qprime */
        siena_ev_qpost,                         /* eevo_qpost */
        siena_ev_qmoderate,                     /* eevo_qmoderate */
#if EFSYS_OPT_QSTATS
        siena_ev_qstats_update,                 /* eevo_qstats_update */
#endif
};
#endif /* EFSYS_OPT_SIENA */

#if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD || EFSYS_OPT_MEDFORD2
static const efx_ev_ops_t       __efx_ev_ef10_ops = {
        ef10_ev_init,                           /* eevo_init */
        ef10_ev_fini,                           /* eevo_fini */
        ef10_ev_qcreate,                        /* eevo_qcreate */
        ef10_ev_qdestroy,                       /* eevo_qdestroy */
        ef10_ev_qprime,                         /* eevo_qprime */
        ef10_ev_qpost,                          /* eevo_qpost */
        ef10_ev_qmoderate,                      /* eevo_qmoderate */
#if EFSYS_OPT_QSTATS
        ef10_ev_qstats_update,                  /* eevo_qstats_update */
#endif
};
#endif /* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD || EFSYS_OPT_MEDFORD2 */

        __checkReturn   efx_rc_t
efx_ev_init(
        __in            efx_nic_t *enp)
{
        const efx_ev_ops_t *eevop;
        efx_rc_t rc;

        EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
        EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_INTR);

        if (enp->en_mod_flags & EFX_MOD_EV) {
                rc = EINVAL;
                goto fail1;
        }

        switch (enp->en_family) {
#if EFSYS_OPT_SIENA
        case EFX_FAMILY_SIENA:
                eevop = &__efx_ev_siena_ops;
                break;
#endif /* EFSYS_OPT_SIENA */

#if EFSYS_OPT_HUNTINGTON
        case EFX_FAMILY_HUNTINGTON:
                eevop = &__efx_ev_ef10_ops;
                break;
#endif /* EFSYS_OPT_HUNTINGTON */

#if EFSYS_OPT_MEDFORD
        case EFX_FAMILY_MEDFORD:
                eevop = &__efx_ev_ef10_ops;
                break;
#endif /* EFSYS_OPT_MEDFORD */

#if EFSYS_OPT_MEDFORD2
        case EFX_FAMILY_MEDFORD2:
                eevop = &__efx_ev_ef10_ops;
                break;
#endif /* EFSYS_OPT_MEDFORD2 */

        default:
                EFSYS_ASSERT(0);
                rc = ENOTSUP;
                goto fail1;
        }

        EFSYS_ASSERT3U(enp->en_ev_qcount, ==, 0);

        if ((rc = eevop->eevo_init(enp)) != 0)
                goto fail2;

        enp->en_eevop = eevop;
        enp->en_mod_flags |= EFX_MOD_EV;
        return (0);

fail2:
        EFSYS_PROBE(fail2);

fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        enp->en_eevop = NULL;
        enp->en_mod_flags &= ~EFX_MOD_EV;
        return (rc);
}

                void
efx_ev_fini(
        __in    efx_nic_t *enp)
{
        const efx_ev_ops_t *eevop = enp->en_eevop;

        EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
        EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_INTR);
        EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_EV);
        EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_RX));
        EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_TX));
        EFSYS_ASSERT3U(enp->en_ev_qcount, ==, 0);

        eevop->eevo_fini(enp);

        enp->en_eevop = NULL;
        enp->en_mod_flags &= ~EFX_MOD_EV;
}

        __checkReturn   efx_rc_t
efx_ev_qcreate(
        __in            efx_nic_t *enp,
        __in            unsigned int index,
        __in            efsys_mem_t *esmp,
        __in            size_t ndescs,
        __in            uint32_t id,
        __in            uint32_t us,
        __in            uint32_t flags,
        __deref_out     efx_evq_t **eepp)
{
        const efx_ev_ops_t *eevop = enp->en_eevop;
        efx_evq_t *eep;
        efx_rc_t rc;

        EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
        EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_EV);

        EFSYS_ASSERT3U(enp->en_ev_qcount + 1, <,
            enp->en_nic_cfg.enc_evq_limit);

        switch (flags & EFX_EVQ_FLAGS_NOTIFY_MASK) {
        case EFX_EVQ_FLAGS_NOTIFY_INTERRUPT:
                break;
        case EFX_EVQ_FLAGS_NOTIFY_DISABLED:
                if (us != 0) {
                        rc = EINVAL;
                        goto fail1;
                }
                break;
        default:
                rc = EINVAL;
                goto fail2;
        }

        /* Allocate an EVQ object */
        EFSYS_KMEM_ALLOC(enp->en_esip, sizeof (efx_evq_t), eep);
        if (eep == NULL) {
                rc = ENOMEM;
                goto fail3;
        }

        eep->ee_magic = EFX_EVQ_MAGIC;
        eep->ee_enp = enp;
        eep->ee_index = index;
        eep->ee_mask = ndescs - 1;
        eep->ee_flags = flags;
        eep->ee_esmp = esmp;

        /*
         * Set outputs before the queue is created because interrupts may be
         * raised for events immediately after the queue is created, before the
         * function call below returns. See bug58606.
         *
         * The eepp pointer passed in by the client must therefore point to data
         * shared with the client's event processing context.
         */
        enp->en_ev_qcount++;
        *eepp = eep;

        if ((rc = eevop->eevo_qcreate(enp, index, esmp, ndescs, id, us, flags,
            eep)) != 0)
                goto fail4;

        return (0);

fail4:
        EFSYS_PROBE(fail4);

        *eepp = NULL;
        enp->en_ev_qcount--;
        EFSYS_KMEM_FREE(enp->en_esip, sizeof (efx_evq_t), eep);
fail3:
        EFSYS_PROBE(fail3);
fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);
        return (rc);
}

                void
efx_ev_qdestroy(
        __in    efx_evq_t *eep)
{
        efx_nic_t *enp = eep->ee_enp;
        const efx_ev_ops_t *eevop = enp->en_eevop;

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);

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

        eevop->eevo_qdestroy(eep);

        /* Free the EVQ object */
        EFSYS_KMEM_FREE(enp->en_esip, sizeof (efx_evq_t), eep);
}

        __checkReturn   efx_rc_t
efx_ev_qprime(
        __in            efx_evq_t *eep,
        __in            unsigned int count)
{
        efx_nic_t *enp = eep->ee_enp;
        const efx_ev_ops_t *eevop = enp->en_eevop;
        efx_rc_t rc;

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);

        if (!(enp->en_mod_flags & EFX_MOD_INTR)) {
                rc = EINVAL;
                goto fail1;
        }

        if ((rc = eevop->eevo_qprime(eep, count)) != 0)
                goto fail2;

        return (0);

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

        __checkReturn   boolean_t
efx_ev_qpending(
        __in            efx_evq_t *eep,
        __in            unsigned int count)
{
        size_t offset;
        efx_qword_t qword;

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);

        offset = (count & eep->ee_mask) * sizeof (efx_qword_t);
        EFSYS_MEM_READQ(eep->ee_esmp, offset, &qword);

        return (EFX_EV_PRESENT(qword));
}

#if EFSYS_OPT_EV_PREFETCH

                        void
efx_ev_qprefetch(
        __in            efx_evq_t *eep,
        __in            unsigned int count)
{
        unsigned int offset;

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);

        offset = (count & eep->ee_mask) * sizeof (efx_qword_t);
        EFSYS_MEM_PREFETCH(eep->ee_esmp, offset);
}

#endif  /* EFSYS_OPT_EV_PREFETCH */

#define EFX_EV_BATCH    8

                        void
efx_ev_qpoll(
        __in            efx_evq_t *eep,
        __inout         unsigned int *countp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        efx_qword_t ev[EFX_EV_BATCH];
        unsigned int batch;
        unsigned int total;
        unsigned int count;
        unsigned int index;
        size_t offset;

        /* Ensure events codes match for EF10 (Huntington/Medford) and Siena */
        EFX_STATIC_ASSERT(ESF_DZ_EV_CODE_LBN == FSF_AZ_EV_CODE_LBN);
        EFX_STATIC_ASSERT(ESF_DZ_EV_CODE_WIDTH == FSF_AZ_EV_CODE_WIDTH);

        EFX_STATIC_ASSERT(ESE_DZ_EV_CODE_RX_EV == FSE_AZ_EV_CODE_RX_EV);
        EFX_STATIC_ASSERT(ESE_DZ_EV_CODE_TX_EV == FSE_AZ_EV_CODE_TX_EV);
        EFX_STATIC_ASSERT(ESE_DZ_EV_CODE_DRIVER_EV == FSE_AZ_EV_CODE_DRIVER_EV);
        EFX_STATIC_ASSERT(ESE_DZ_EV_CODE_DRV_GEN_EV ==
            FSE_AZ_EV_CODE_DRV_GEN_EV);
#if EFSYS_OPT_MCDI
        EFX_STATIC_ASSERT(ESE_DZ_EV_CODE_MCDI_EV ==
            FSE_AZ_EV_CODE_MCDI_EVRESPONSE);
#endif

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);
        EFSYS_ASSERT(countp != NULL);
        EFSYS_ASSERT(eecp != NULL);

        count = *countp;
        do {
                /* Read up until the end of the batch period */
                batch = EFX_EV_BATCH - (count & (EFX_EV_BATCH - 1));
                offset = (count & eep->ee_mask) * sizeof (efx_qword_t);
                for (total = 0; total < batch; ++total) {
                        EFSYS_MEM_READQ(eep->ee_esmp, offset, &(ev[total]));

                        if (!EFX_EV_PRESENT(ev[total]))
                                break;

                        EFSYS_PROBE3(event, unsigned int, eep->ee_index,
                            uint32_t, EFX_QWORD_FIELD(ev[total], EFX_DWORD_1),
                            uint32_t, EFX_QWORD_FIELD(ev[total], EFX_DWORD_0));

                        offset += sizeof (efx_qword_t);
                }

#if EFSYS_OPT_EV_PREFETCH && (EFSYS_OPT_EV_PREFETCH_PERIOD > 1)
                /*
                 * Prefetch the next batch when we get within PREFETCH_PERIOD
                 * of a completed batch. If the batch is smaller, then prefetch
                 * immediately.
                 */
                if (total == batch && total < EFSYS_OPT_EV_PREFETCH_PERIOD)
                        EFSYS_MEM_PREFETCH(eep->ee_esmp, offset);
#endif  /* EFSYS_OPT_EV_PREFETCH */

                /* Process the batch of events */
                for (index = 0; index < total; ++index) {
                        boolean_t should_abort;
                        uint32_t code;

#if EFSYS_OPT_EV_PREFETCH
                        /* Prefetch if we've now reached the batch period */
                        if (total == batch &&
                            index + EFSYS_OPT_EV_PREFETCH_PERIOD == total) {
                                offset = (count + batch) & eep->ee_mask;
                                offset *= sizeof (efx_qword_t);

                                EFSYS_MEM_PREFETCH(eep->ee_esmp, offset);
                        }
#endif  /* EFSYS_OPT_EV_PREFETCH */

                        EFX_EV_QSTAT_INCR(eep, EV_ALL);

                        code = EFX_QWORD_FIELD(ev[index], FSF_AZ_EV_CODE);
                        switch (code) {
                        case FSE_AZ_EV_CODE_RX_EV:
                                should_abort = eep->ee_rx(eep,
                                    &(ev[index]), eecp, arg);
                                break;
                        case FSE_AZ_EV_CODE_TX_EV:
                                should_abort = eep->ee_tx(eep,
                                    &(ev[index]), eecp, arg);
                                break;
                        case FSE_AZ_EV_CODE_DRIVER_EV:
                                should_abort = eep->ee_driver(eep,
                                    &(ev[index]), eecp, arg);
                                break;
                        case FSE_AZ_EV_CODE_DRV_GEN_EV:
                                should_abort = eep->ee_drv_gen(eep,
                                    &(ev[index]), eecp, arg);
                                break;
#if EFSYS_OPT_MCDI
                        case FSE_AZ_EV_CODE_MCDI_EVRESPONSE:
                                should_abort = eep->ee_mcdi(eep,
                                    &(ev[index]), eecp, arg);
                                break;
#endif
                        case FSE_AZ_EV_CODE_GLOBAL_EV:
                                if (eep->ee_global) {
                                        should_abort = eep->ee_global(eep,
                                            &(ev[index]), eecp, arg);
                                        break;
                                }
                                /* else fallthrough */
                        default:
                                EFSYS_PROBE3(bad_event,
                                    unsigned int, eep->ee_index,
                                    uint32_t,
                                    EFX_QWORD_FIELD(ev[index], EFX_DWORD_1),
                                    uint32_t,
                                    EFX_QWORD_FIELD(ev[index], EFX_DWORD_0));

                                EFSYS_ASSERT(eecp->eec_exception != NULL);
                                (void) eecp->eec_exception(arg,
                                        EFX_EXCEPTION_EV_ERROR, code);
                                should_abort = B_TRUE;
                        }
                        if (should_abort) {
                                /* Ignore subsequent events */
                                total = index + 1;

                                /*
                                 * Poison batch to ensure the outer
                                 * loop is broken out of.
                                 */
                                EFSYS_ASSERT(batch <= EFX_EV_BATCH);
                                batch += (EFX_EV_BATCH << 1);
                                EFSYS_ASSERT(total != batch);
                                break;
                        }
                }

                /*
                 * Now that the hardware has most likely moved onto dma'ing
                 * into the next cache line, clear the processed events. Take
                 * care to only clear out events that we've processed
                 */
                EFX_SET_QWORD(ev[0]);
                offset = (count & eep->ee_mask) * sizeof (efx_qword_t);
                for (index = 0; index < total; ++index) {
                        EFSYS_MEM_WRITEQ(eep->ee_esmp, offset, &(ev[0]));
                        offset += sizeof (efx_qword_t);
                }

                count += total;

        } while (total == batch);

        *countp = count;
}

                        void
efx_ev_qpost(
        __in    efx_evq_t *eep,
        __in    uint16_t data)
{
        efx_nic_t *enp = eep->ee_enp;
        const efx_ev_ops_t *eevop = enp->en_eevop;

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);

        EFSYS_ASSERT(eevop != NULL &&
            eevop->eevo_qpost != NULL);

        eevop->eevo_qpost(eep, data);
}

        __checkReturn   efx_rc_t
efx_ev_usecs_to_ticks(
        __in            efx_nic_t *enp,
        __in            unsigned int us,
        __out           unsigned int *ticksp)
{
        efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
        unsigned int ticks;

        /* Convert microseconds to a timer tick count */
        if (us == 0)
                ticks = 0;
        else if (us * 1000 < encp->enc_evq_timer_quantum_ns)
                ticks = 1;      /* Never round down to zero */
        else
                ticks = us * 1000 / encp->enc_evq_timer_quantum_ns;

        *ticksp = ticks;
        return (0);
}

        __checkReturn   efx_rc_t
efx_ev_qmoderate(
        __in            efx_evq_t *eep,
        __in            unsigned int us)
{
        efx_nic_t *enp = eep->ee_enp;
        const efx_ev_ops_t *eevop = enp->en_eevop;
        efx_rc_t rc;

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);

        if ((eep->ee_flags & EFX_EVQ_FLAGS_NOTIFY_MASK) ==
            EFX_EVQ_FLAGS_NOTIFY_DISABLED) {
                rc = EINVAL;
                goto fail1;
        }

        if ((rc = eevop->eevo_qmoderate(eep, us)) != 0)
                goto fail2;

        return (0);

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

#if EFSYS_OPT_QSTATS
                                        void
efx_ev_qstats_update(
        __in                            efx_evq_t *eep,
        __inout_ecount(EV_NQSTATS)      efsys_stat_t *stat)

{       efx_nic_t *enp = eep->ee_enp;
        const efx_ev_ops_t *eevop = enp->en_eevop;

        EFSYS_ASSERT3U(eep->ee_magic, ==, EFX_EVQ_MAGIC);

        eevop->eevo_qstats_update(eep, stat);
}

#endif  /* EFSYS_OPT_QSTATS */

#if EFSYS_OPT_SIENA

static  __checkReturn   efx_rc_t
siena_ev_init(
        __in            efx_nic_t *enp)
{
        efx_oword_t oword;

        /*
         * Program the event queue for receive and transmit queue
         * flush events.
         */
        EFX_BAR_READO(enp, FR_AZ_DP_CTRL_REG, &oword);
        EFX_SET_OWORD_FIELD(oword, FRF_AZ_FLS_EVQ_ID, 0);
        EFX_BAR_WRITEO(enp, FR_AZ_DP_CTRL_REG, &oword);

        return (0);

}

static  __checkReturn   boolean_t
siena_ev_rx_not_ok(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            uint32_t label,
        __in            uint32_t id,
        __inout         uint16_t *flagsp)
{
        boolean_t ignore = B_FALSE;

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_TOBE_DISC) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_TOBE_DISC);
                EFSYS_PROBE(tobe_disc);
                /*
                 * Assume this is a unicast address mismatch, unless below
                 * we find either FSF_AZ_RX_EV_ETH_CRC_ERR or
                 * EV_RX_PAUSE_FRM_ERR is set.
                 */
                (*flagsp) |= EFX_ADDR_MISMATCH;
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_FRM_TRUNC) != 0) {
                EFSYS_PROBE2(frm_trunc, uint32_t, label, uint32_t, id);
                EFX_EV_QSTAT_INCR(eep, EV_RX_FRM_TRUNC);
                (*flagsp) |= EFX_DISCARD;

#if EFSYS_OPT_RX_SCATTER
                /*
                 * Lookout for payload queue ran dry errors and ignore them.
                 *
                 * Sadly for the header/data split cases, the descriptor
                 * pointer in this event refers to the header queue and
                 * therefore cannot be easily detected as duplicate.
                 * So we drop these and rely on the receive processing seeing
                 * a subsequent packet with FSF_AZ_RX_EV_SOP set to discard
                 * the partially received packet.
                 */
                if ((EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_SOP) == 0) &&
                    (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_JUMBO_CONT) == 0) &&
                    (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_BYTE_CNT) == 0))
                        ignore = B_TRUE;
#endif  /* EFSYS_OPT_RX_SCATTER */
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_ETH_CRC_ERR) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_ETH_CRC_ERR);
                EFSYS_PROBE(crc_err);
                (*flagsp) &= ~EFX_ADDR_MISMATCH;
                (*flagsp) |= EFX_DISCARD;
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_PAUSE_FRM_ERR) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_PAUSE_FRM_ERR);
                EFSYS_PROBE(pause_frm_err);
                (*flagsp) &= ~EFX_ADDR_MISMATCH;
                (*flagsp) |= EFX_DISCARD;
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_BUF_OWNER_ID_ERR) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_BUF_OWNER_ID_ERR);
                EFSYS_PROBE(owner_id_err);
                (*flagsp) |= EFX_DISCARD;
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_IP_HDR_CHKSUM_ERR) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_IPV4_HDR_CHKSUM_ERR);
                EFSYS_PROBE(ipv4_err);
                (*flagsp) &= ~EFX_CKSUM_IPV4;
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_TCP_UDP_CHKSUM_ERR) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_TCP_UDP_CHKSUM_ERR);
                EFSYS_PROBE(udp_chk_err);
                (*flagsp) &= ~EFX_CKSUM_TCPUDP;
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_IP_FRAG_ERR) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_IP_FRAG_ERR);

                /*
                 * If IP is fragmented FSF_AZ_RX_EV_IP_FRAG_ERR is set. This
                 * causes FSF_AZ_RX_EV_PKT_OK to be clear. This is not an error
                 * condition.
                 */
                (*flagsp) &= ~(EFX_PKT_TCP | EFX_PKT_UDP | EFX_CKSUM_TCPUDP);
        }

        return (ignore);
}

static  __checkReturn   boolean_t
siena_ev_rx(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        uint32_t id;
        uint32_t size;
        uint32_t label;
        boolean_t ok;
#if EFSYS_OPT_RX_SCATTER
        boolean_t sop;
        boolean_t jumbo_cont;
#endif  /* EFSYS_OPT_RX_SCATTER */
        uint32_t hdr_type;
        boolean_t is_v6;
        uint16_t flags;
        boolean_t ignore;
        boolean_t should_abort;

        EFX_EV_QSTAT_INCR(eep, EV_RX);

        /* Basic packet information */
        id = EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_DESC_PTR);
        size = EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_BYTE_CNT);
        label = EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_Q_LABEL);
        ok = (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_PKT_OK) != 0);

#if EFSYS_OPT_RX_SCATTER
        sop = (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_SOP) != 0);
        jumbo_cont = (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_JUMBO_CONT) != 0);
#endif  /* EFSYS_OPT_RX_SCATTER */

        hdr_type = EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_HDR_TYPE);

        is_v6 = (EFX_QWORD_FIELD(*eqp, FSF_CZ_RX_EV_IPV6_PKT) != 0);

        /*
         * If packet is marked as OK and packet type is TCP/IP or
         * UDP/IP or other IP, then we can rely on the hardware checksums.
         */
        switch (hdr_type) {
        case FSE_AZ_RX_EV_HDR_TYPE_IPV4V6_TCP:
                flags = EFX_PKT_TCP | EFX_CKSUM_TCPUDP;
                if (is_v6) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_TCP_IPV6);
                        flags |= EFX_PKT_IPV6;
                } else {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_TCP_IPV4);
                        flags |= EFX_PKT_IPV4 | EFX_CKSUM_IPV4;
                }
                break;

        case FSE_AZ_RX_EV_HDR_TYPE_IPV4V6_UDP:
                flags = EFX_PKT_UDP | EFX_CKSUM_TCPUDP;
                if (is_v6) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_UDP_IPV6);
                        flags |= EFX_PKT_IPV6;
                } else {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_UDP_IPV4);
                        flags |= EFX_PKT_IPV4 | EFX_CKSUM_IPV4;
                }
                break;

        case FSE_AZ_RX_EV_HDR_TYPE_IPV4V6_OTHER:
                if (is_v6) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_OTHER_IPV6);
                        flags = EFX_PKT_IPV6;
                } else {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_OTHER_IPV4);
                        flags = EFX_PKT_IPV4 | EFX_CKSUM_IPV4;
                }
                break;

        case FSE_AZ_RX_EV_HDR_TYPE_OTHER:
                EFX_EV_QSTAT_INCR(eep, EV_RX_NON_IP);
                flags = 0;
                break;

        default:
                EFSYS_ASSERT(B_FALSE);
                flags = 0;
                break;
        }

#if EFSYS_OPT_RX_SCATTER
        /* Report scatter and header/lookahead split buffer flags */
        if (sop)
                flags |= EFX_PKT_START;
        if (jumbo_cont)
                flags |= EFX_PKT_CONT;
#endif  /* EFSYS_OPT_RX_SCATTER */

        /* Detect errors included in the FSF_AZ_RX_EV_PKT_OK indication */
        if (!ok) {
                ignore = siena_ev_rx_not_ok(eep, eqp, label, id, &flags);
                if (ignore) {
                        EFSYS_PROBE4(rx_complete, uint32_t, label, uint32_t, id,
                            uint32_t, size, uint16_t, flags);

                        return (B_FALSE);
                }
        }

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

        /* Detect multicast packets that didn't match the filter */
        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_MCAST_PKT) != 0) {
                EFX_EV_QSTAT_INCR(eep, EV_RX_MCAST_PKT);

                if (EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_MCAST_HASH_MATCH) != 0) {
                        EFX_EV_QSTAT_INCR(eep, EV_RX_MCAST_HASH_MATCH);
                } else {
                        EFSYS_PROBE(mcast_mismatch);
                        flags |= EFX_ADDR_MISMATCH;
                }
        } else {
                flags |= EFX_PKT_UNICAST;
        }

        /*
         * The packet parser in Siena can abort parsing packets under
         * certain error conditions, setting the PKT_NOT_PARSED bit
         * (which clears PKT_OK). If this is set, then don't trust
         * the PKT_TYPE field.
         */
        if (!ok) {
                uint32_t parse_err;

                parse_err = EFX_QWORD_FIELD(*eqp, FSF_CZ_RX_EV_PKT_NOT_PARSED);
                if (parse_err != 0)
                        flags |= EFX_CHECK_VLAN;
        }

        if (~flags & EFX_CHECK_VLAN) {
                uint32_t pkt_type;

                pkt_type = EFX_QWORD_FIELD(*eqp, FSF_AZ_RX_EV_PKT_TYPE);
                if (pkt_type >= FSE_AZ_RX_EV_PKT_TYPE_VLAN)
                        flags |= EFX_PKT_VLAN_TAGGED;
        }

        EFSYS_PROBE4(rx_complete, uint32_t, label, uint32_t, id,
            uint32_t, size, uint16_t, flags);

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

        return (should_abort);
}

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

        EFX_EV_QSTAT_INCR(eep, EV_TX);

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_COMP) != 0 &&
            EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_PKT_ERR) == 0 &&
            EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_PKT_TOO_BIG) == 0 &&
            EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_WQ_FF_FULL) == 0) {
                id = EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_DESC_PTR);
                label = EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_Q_LABEL);

                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);
        }

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_COMP) != 0)
                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));

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_PKT_ERR) != 0)
                EFX_EV_QSTAT_INCR(eep, EV_TX_PKT_ERR);

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_PKT_TOO_BIG) != 0)
                EFX_EV_QSTAT_INCR(eep, EV_TX_PKT_TOO_BIG);

        if (EFX_QWORD_FIELD(*eqp, FSF_AZ_TX_EV_WQ_FF_FULL) != 0)
                EFX_EV_QSTAT_INCR(eep, EV_TX_WQ_FF_FULL);

        EFX_EV_QSTAT_INCR(eep, EV_TX_UNEXPECTED);
        return (B_FALSE);
}

static  __checkReturn   boolean_t
siena_ev_global(
        __in            efx_evq_t *eep,
        __in            efx_qword_t *eqp,
        __in            const efx_ev_callbacks_t *eecp,
        __in_opt        void *arg)
{
        _NOTE(ARGUNUSED(eqp, eecp, arg))

        EFX_EV_QSTAT_INCR(eep, EV_GLOBAL);

        return (B_FALSE);
}

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

        EFX_EV_QSTAT_INCR(eep, EV_DRIVER);
        should_abort = B_FALSE;

        switch (EFX_QWORD_FIELD(*eqp, FSF_AZ_DRIVER_EV_SUBCODE)) {
        case FSE_AZ_TX_DESCQ_FLS_DONE_EV: {
                uint32_t txq_index;

                EFX_EV_QSTAT_INCR(eep, EV_DRIVER_TX_DESCQ_FLS_DONE);

                txq_index = EFX_QWORD_FIELD(*eqp, FSF_AZ_DRIVER_EV_SUBDATA);

                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 FSE_AZ_RX_DESCQ_FLS_DONE_EV: {
                uint32_t rxq_index;
                uint32_t failed;

                rxq_index = EFX_QWORD_FIELD(*eqp, FSF_AZ_DRIVER_EV_RX_DESCQ_ID);
                failed = EFX_QWORD_FIELD(*eqp, FSF_AZ_DRIVER_EV_RX_FLUSH_FAIL);

                EFSYS_ASSERT(eecp->eec_rxq_flush_done != NULL);
                EFSYS_ASSERT(eecp->eec_rxq_flush_failed != NULL);

                if (failed) {
                        EFX_EV_QSTAT_INCR(eep, EV_DRIVER_RX_DESCQ_FLS_FAILED);

                        EFSYS_PROBE1(rx_descq_fls_failed, uint32_t, rxq_index);

                        should_abort = eecp->eec_rxq_flush_failed(arg,
                                                                    rxq_index);
                } else {
                        EFX_EV_QSTAT_INCR(eep, EV_DRIVER_RX_DESCQ_FLS_DONE);

                        EFSYS_PROBE1(rx_descq_fls_done, uint32_t, rxq_index);

                        should_abort = eecp->eec_rxq_flush_done(arg, rxq_index);
                }

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

                break;

        case FSE_AZ_EVQ_NOT_EN_EV:
                EFSYS_PROBE(evq_not_en);
                break;

        case FSE_AZ_SRM_UPD_DONE_EV: {
                uint32_t code;

                EFX_EV_QSTAT_INCR(eep, EV_DRIVER_SRM_UPD_DONE);

                code = EFX_QWORD_FIELD(*eqp, FSF_AZ_DRIVER_EV_SUBDATA);

                EFSYS_ASSERT(eecp->eec_sram != NULL);
                should_abort = eecp->eec_sram(arg, code);

                break;
        }
        case FSE_AZ_WAKE_UP_EV: {
                uint32_t id;

                id = EFX_QWORD_FIELD(*eqp, FSF_AZ_DRIVER_EV_SUBDATA);

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

                break;
        }
        case FSE_AZ_TX_PKT_NON_TCP_UDP:
                EFSYS_PROBE(tx_pkt_non_tcp_udp);
                break;

        case FSE_AZ_TIMER_EV: {
                uint32_t id;

                id = EFX_QWORD_FIELD(*eqp, FSF_AZ_DRIVER_EV_SUBDATA);

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

                break;
        }
        case FSE_AZ_RX_DSC_ERROR_EV:
                EFX_EV_QSTAT_INCR(eep, EV_DRIVER_RX_DSC_ERROR);

                EFSYS_PROBE(rx_dsc_error);

                EFSYS_ASSERT(eecp->eec_exception != NULL);
                should_abort = eecp->eec_exception(arg,
                        EFX_EXCEPTION_RX_DSC_ERROR, 0);

                break;

        case FSE_AZ_TX_DSC_ERROR_EV:
                EFX_EV_QSTAT_INCR(eep, EV_DRIVER_TX_DSC_ERROR);

                EFSYS_PROBE(tx_dsc_error);

                EFSYS_ASSERT(eecp->eec_exception != NULL);
                should_abort = eecp->eec_exception(arg,
                        EFX_EXCEPTION_TX_DSC_ERROR, 0);

                break;

        default:
                break;
        }

        return (should_abort);
}

static  __checkReturn   boolean_t
siena_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);

        data = EFX_QWORD_FIELD(*eqp, FSF_AZ_EV_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);
}

#if EFSYS_OPT_MCDI

static  __checkReturn   boolean_t
siena_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 int code;
        boolean_t should_abort = B_FALSE;

        EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA);

        if (enp->en_family != EFX_FAMILY_SIENA)
                goto out;

        EFSYS_ASSERT(eecp->eec_link_change != NULL);
        EFSYS_ASSERT(eecp->eec_exception != NULL);
#if EFSYS_OPT_MON_STATS
        EFSYS_ASSERT(eecp->eec_monitor != NULL);
#endif

        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;

        case MCDI_EVENT_CODE_LINKCHANGE: {
                efx_link_mode_t link_mode;

                siena_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;

                if ((rc = mcdi_mon_ev(enp, eqp, &id, &value)) == 0)
                        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 */
#else
                should_abort = B_FALSE;
#endif
                break;
        }
        case MCDI_EVENT_CODE_SCHEDERR:
                /* Informational only */
                break;

        case MCDI_EVENT_CODE_REBOOT:
                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;
        }

        default:
                EFSYS_PROBE1(mc_pcol_error, int, code);
                break;
        }

out:
        return (should_abort);
}

#endif  /* EFSYS_OPT_MCDI */

static  __checkReturn   efx_rc_t
siena_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;

        EFX_POPULATE_DWORD_1(dword, FRF_AZ_EVQ_RPTR, rptr);

        EFX_BAR_TBL_WRITED(enp, FR_AZ_EVQ_RPTR_REG, eep->ee_index,
                            &dword, B_FALSE);

        return (0);
}

static          void
siena_ev_qpost(
        __in    efx_evq_t *eep,
        __in    uint16_t data)
{
        efx_nic_t *enp = eep->ee_enp;
        efx_qword_t ev;
        efx_oword_t oword;

        EFX_POPULATE_QWORD_2(ev, FSF_AZ_EV_CODE, FSE_AZ_EV_CODE_DRV_GEN_EV,
            FSF_AZ_EV_DATA_DW0, (uint32_t)data);

        EFX_POPULATE_OWORD_3(oword, FRF_AZ_DRV_EV_QID, eep->ee_index,
            EFX_DWORD_0, EFX_QWORD_FIELD(ev, EFX_DWORD_0),
            EFX_DWORD_1, EFX_QWORD_FIELD(ev, EFX_DWORD_1));

        EFX_BAR_WRITEO(enp, FR_AZ_DRV_EV_REG, &oword);
}

static  __checkReturn   efx_rc_t
siena_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);
        unsigned int locked;
        efx_dword_t dword;
        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) {
                EFX_POPULATE_DWORD_2(dword,
                    FRF_CZ_TC_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS,
                    FRF_CZ_TC_TIMER_VAL, 0);
        } else {
                unsigned int ticks;

                if ((rc = efx_ev_usecs_to_ticks(enp, us, &ticks)) != 0)
                        goto fail2;

                EFSYS_ASSERT(ticks > 0);
                EFX_POPULATE_DWORD_2(dword,
                    FRF_CZ_TC_TIMER_MODE, FFE_CZ_TIMER_MODE_INT_HLDOFF,
                    FRF_CZ_TC_TIMER_VAL, ticks - 1);
        }

        locked = (eep->ee_index == 0) ? 1 : 0;

        EFX_BAR_TBL_WRITED(enp, FR_BZ_TIMER_COMMAND_REGP0,
            eep->ee_index, &dword, locked);

        return (0);

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

        return (rc);
}

static  __checkReturn   efx_rc_t
siena_ev_qcreate(
        __in            efx_nic_t *enp,
        __in            unsigned int index,
        __in            efsys_mem_t *esmp,
        __in            size_t ndescs,
        __in            uint32_t id,
        __in            uint32_t us,
        __in            uint32_t flags,
        __in            efx_evq_t *eep)
{
        efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
        uint32_t size;
        efx_oword_t oword;
        efx_rc_t rc;
        boolean_t notify_mode;

        _NOTE(ARGUNUSED(esmp))

        EFX_STATIC_ASSERT(ISP2(EFX_EVQ_MAXNEVS));
        EFX_STATIC_ASSERT(ISP2(EFX_EVQ_MINNEVS));

        if (!ISP2(ndescs) ||
            (ndescs < EFX_EVQ_MINNEVS) || (ndescs > EFX_EVQ_MAXNEVS)) {
                rc = EINVAL;
                goto fail1;
        }
        if (index >= encp->enc_evq_limit) {
                rc = EINVAL;
                goto fail2;
        }
#if EFSYS_OPT_RX_SCALE
        if (enp->en_intr.ei_type == EFX_INTR_LINE &&
            index >= EFX_MAXRSS_LEGACY) {
                rc = EINVAL;
                goto fail3;
        }
#endif
        for (size = 0; (1 << size) <= (EFX_EVQ_MAXNEVS / EFX_EVQ_MINNEVS);
            size++)
                if ((1 << size) == (int)(ndescs / EFX_EVQ_MINNEVS))
                        break;
        if (id + (1 << size) >= encp->enc_buftbl_limit) {
                rc = EINVAL;
                goto fail4;
        }

        /* Set up the handler table */
        eep->ee_rx      = siena_ev_rx;
        eep->ee_tx      = siena_ev_tx;
        eep->ee_driver  = siena_ev_driver;
        eep->ee_global  = siena_ev_global;
        eep->ee_drv_gen = siena_ev_drv_gen;
#if EFSYS_OPT_MCDI
        eep->ee_mcdi    = siena_ev_mcdi;
#endif  /* EFSYS_OPT_MCDI */

        notify_mode = ((flags & EFX_EVQ_FLAGS_NOTIFY_MASK) !=
            EFX_EVQ_FLAGS_NOTIFY_INTERRUPT);

        /* Set up the new event queue */
        EFX_POPULATE_OWORD_3(oword, FRF_CZ_TIMER_Q_EN, 1,
            FRF_CZ_HOST_NOTIFY_MODE, notify_mode,
            FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS);
        EFX_BAR_TBL_WRITEO(enp, FR_AZ_TIMER_TBL, index, &oword, B_TRUE);

        EFX_POPULATE_OWORD_3(oword, FRF_AZ_EVQ_EN, 1, FRF_AZ_EVQ_SIZE, size,
            FRF_AZ_EVQ_BUF_BASE_ID, id);

        EFX_BAR_TBL_WRITEO(enp, FR_AZ_EVQ_PTR_TBL, index, &oword, B_TRUE);

        /* Set initial interrupt moderation */
        siena_ev_qmoderate(eep, us);

        return (0);

fail4:
        EFSYS_PROBE(fail4);
#if EFSYS_OPT_RX_SCALE
fail3:
        EFSYS_PROBE(fail3);
#endif
fail2:
        EFSYS_PROBE(fail2);
fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);

        return (rc);
}

#endif /* EFSYS_OPT_SIENA */

#if EFSYS_OPT_QSTATS
#if EFSYS_OPT_NAMES
/* START MKCONFIG GENERATED EfxEventQueueStatNamesBlock c0f3bc5083b40532 */
static const char * const __efx_ev_qstat_name[] = {
        "all",
        "rx",
        "rx_ok",
        "rx_frm_trunc",
        "rx_tobe_disc",
        "rx_pause_frm_err",
        "rx_buf_owner_id_err",
        "rx_ipv4_hdr_chksum_err",
        "rx_tcp_udp_chksum_err",
        "rx_eth_crc_err",
        "rx_ip_frag_err",
        "rx_mcast_pkt",
        "rx_mcast_hash_match",
        "rx_tcp_ipv4",
        "rx_tcp_ipv6",
        "rx_udp_ipv4",
        "rx_udp_ipv6",
        "rx_other_ipv4",
        "rx_other_ipv6",
        "rx_non_ip",
        "rx_batch",
        "tx",
        "tx_wq_ff_full",
        "tx_pkt_err",
        "tx_pkt_too_big",
        "tx_unexpected",
        "global",
        "global_mnt",
        "driver",
        "driver_srm_upd_done",
        "driver_tx_descq_fls_done",
        "driver_rx_descq_fls_done",
        "driver_rx_descq_fls_failed",
        "driver_rx_dsc_error",
        "driver_tx_dsc_error",
        "drv_gen",
        "mcdi_response",
};
/* END MKCONFIG GENERATED EfxEventQueueStatNamesBlock */

                const char *
efx_ev_qstat_name(
        __in    efx_nic_t *enp,
        __in    unsigned int id)
{
        _NOTE(ARGUNUSED(enp))

        EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
        EFSYS_ASSERT3U(id, <, EV_NQSTATS);

        return (__efx_ev_qstat_name[id]);
}
#endif  /* EFSYS_OPT_NAMES */
#endif  /* EFSYS_OPT_QSTATS */

#if EFSYS_OPT_SIENA

#if EFSYS_OPT_QSTATS
static                                  void
siena_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          void
siena_ev_qdestroy(
        __in    efx_evq_t *eep)
{
        efx_nic_t *enp = eep->ee_enp;
        efx_oword_t oword;

        /* Purge event queue */
        EFX_ZERO_OWORD(oword);

        EFX_BAR_TBL_WRITEO(enp, FR_AZ_EVQ_PTR_TBL,
            eep->ee_index, &oword, B_TRUE);

        EFX_ZERO_OWORD(oword);
        EFX_BAR_TBL_WRITEO(enp, FR_AZ_TIMER_TBL, eep->ee_index, &oword, B_TRUE);
}

static          void
siena_ev_fini(
        __in    efx_nic_t *enp)
{
        _NOTE(ARGUNUSED(enp))
}

#endif /* EFSYS_OPT_SIENA */