static void vmxnet3_activate_device(VMXNET3State *s)

{

    int i;

    static const uint32_t VMXNET3_DEF_TX_THRESHOLD = 1;

    hwaddr qdescr_table_pa;

    uint64_t pa;

    uint32_t size;



    /* Verify configuration consistency */

    if (!vmxnet3_verify_driver_magic(s->drv_shmem)) {

        VMW_ERPRN("Device configuration received from driver is invalid");

        return;

    }



    /* Verify if device is active */

    if (s->device_active) {

        VMW_CFPRN("Vmxnet3 device is active");

        return;

    }



    vmxnet3_adjust_by_guest_type(s);

    vmxnet3_update_features(s);

    vmxnet3_update_pm_state(s);

    vmxnet3_setup_rx_filtering(s);

    /* Cache fields from shared memory */

    s->mtu = VMXNET3_READ_DRV_SHARED32(s->drv_shmem, devRead.misc.mtu);

    VMW_CFPRN("MTU is %u", s->mtu);



    s->max_rx_frags =

        VMXNET3_READ_DRV_SHARED16(s->drv_shmem, devRead.misc.maxNumRxSG);



    if (s->max_rx_frags == 0) {

        s->max_rx_frags = 1;

    }



    VMW_CFPRN("Max RX fragments is %u", s->max_rx_frags);



    s->event_int_idx =

        VMXNET3_READ_DRV_SHARED8(s->drv_shmem, devRead.intrConf.eventIntrIdx);

    assert(vmxnet3_verify_intx(s, s->event_int_idx));

    VMW_CFPRN("Events interrupt line is %u", s->event_int_idx);



    s->auto_int_masking =

        VMXNET3_READ_DRV_SHARED8(s->drv_shmem, devRead.intrConf.autoMask);

    VMW_CFPRN("Automatic interrupt masking is %d", (int)s->auto_int_masking);



    s->txq_num =

        VMXNET3_READ_DRV_SHARED8(s->drv_shmem, devRead.misc.numTxQueues);

    s->rxq_num =

        VMXNET3_READ_DRV_SHARED8(s->drv_shmem, devRead.misc.numRxQueues);



    VMW_CFPRN("Number of TX/RX queues %u/%u", s->txq_num, s->rxq_num);

    vmxnet3_validate_queues(s);



    qdescr_table_pa =

        VMXNET3_READ_DRV_SHARED64(s->drv_shmem, devRead.misc.queueDescPA);

    VMW_CFPRN("TX queues descriptors table is at 0x%" PRIx64, qdescr_table_pa);



    /*

     * Worst-case scenario is a packet that holds all TX rings space so

     * we calculate total size of all TX rings for max TX fragments number

     */

    s->max_tx_frags = 0;



    /* TX queues */

    for (i = 0; i < s->txq_num; i++) {

        hwaddr qdescr_pa =

            qdescr_table_pa + i * sizeof(struct Vmxnet3_TxQueueDesc);



        /* Read interrupt number for this TX queue */

        s->txq_descr[i].intr_idx =

            VMXNET3_READ_TX_QUEUE_DESCR8(qdescr_pa, conf.intrIdx);

        assert(vmxnet3_verify_intx(s, s->txq_descr[i].intr_idx));



        VMW_CFPRN("TX Queue %d interrupt: %d", i, s->txq_descr[i].intr_idx);



        /* Read rings memory locations for TX queues */

        pa = VMXNET3_READ_TX_QUEUE_DESCR64(qdescr_pa, conf.txRingBasePA);

        size = VMXNET3_READ_TX_QUEUE_DESCR32(qdescr_pa, conf.txRingSize);



        vmxnet3_ring_init(&s->txq_descr[i].tx_ring, pa, size,

                          sizeof(struct Vmxnet3_TxDesc), false);

        VMXNET3_RING_DUMP(VMW_CFPRN, "TX", i, &s->txq_descr[i].tx_ring);



        s->max_tx_frags += size;



        /* TXC ring */

        pa = VMXNET3_READ_TX_QUEUE_DESCR64(qdescr_pa, conf.compRingBasePA);

        size = VMXNET3_READ_TX_QUEUE_DESCR32(qdescr_pa, conf.compRingSize);

        vmxnet3_ring_init(&s->txq_descr[i].comp_ring, pa, size,

                          sizeof(struct Vmxnet3_TxCompDesc), true);

        VMXNET3_RING_DUMP(VMW_CFPRN, "TXC", i, &s->txq_descr[i].comp_ring);



        s->txq_descr[i].tx_stats_pa =

            qdescr_pa + offsetof(struct Vmxnet3_TxQueueDesc, stats);



        memset(&s->txq_descr[i].txq_stats, 0,

               sizeof(s->txq_descr[i].txq_stats));



        /* Fill device-managed parameters for queues */

        VMXNET3_WRITE_TX_QUEUE_DESCR32(qdescr_pa,

                                       ctrl.txThreshold,

                                       VMXNET3_DEF_TX_THRESHOLD);

    }



    /* Preallocate TX packet wrapper */

    VMW_CFPRN("Max TX fragments is %u", s->max_tx_frags);

    net_tx_pkt_init(&s->tx_pkt, PCI_DEVICE(s),

                    s->max_tx_frags, s->peer_has_vhdr);

    net_rx_pkt_init(&s->rx_pkt, s->peer_has_vhdr);



    /* Read rings memory locations for RX queues */

    for (i = 0; i < s->rxq_num; i++) {

        int j;

        hwaddr qd_pa =

            qdescr_table_pa + s->txq_num * sizeof(struct Vmxnet3_TxQueueDesc) +

            i * sizeof(struct Vmxnet3_RxQueueDesc);



        /* Read interrupt number for this RX queue */

        s->rxq_descr[i].intr_idx =

            VMXNET3_READ_TX_QUEUE_DESCR8(qd_pa, conf.intrIdx);

        assert(vmxnet3_verify_intx(s, s->rxq_descr[i].intr_idx));



        VMW_CFPRN("RX Queue %d interrupt: %d", i, s->rxq_descr[i].intr_idx);



        /* Read rings memory locations */

        for (j = 0; j < VMXNET3_RX_RINGS_PER_QUEUE; j++) {

            /* RX rings */

            pa = VMXNET3_READ_RX_QUEUE_DESCR64(qd_pa, conf.rxRingBasePA[j]);

            size = VMXNET3_READ_RX_QUEUE_DESCR32(qd_pa, conf.rxRingSize[j]);

            vmxnet3_ring_init(&s->rxq_descr[i].rx_ring[j], pa, size,

                              sizeof(struct Vmxnet3_RxDesc), false);

            VMW_CFPRN("RX queue %d:%d: Base: %" PRIx64 ", Size: %d",

                      i, j, pa, size);

        }



        /* RXC ring */

        pa = VMXNET3_READ_RX_QUEUE_DESCR64(qd_pa, conf.compRingBasePA);

        size = VMXNET3_READ_RX_QUEUE_DESCR32(qd_pa, conf.compRingSize);

        vmxnet3_ring_init(&s->rxq_descr[i].comp_ring, pa, size,

                          sizeof(struct Vmxnet3_RxCompDesc), true);

        VMW_CFPRN("RXC queue %d: Base: %" PRIx64 ", Size: %d", i, pa, size);



        s->rxq_descr[i].rx_stats_pa =

            qd_pa + offsetof(struct Vmxnet3_RxQueueDesc, stats);

        memset(&s->rxq_descr[i].rxq_stats, 0,

               sizeof(s->rxq_descr[i].rxq_stats));

    }



    vmxnet3_validate_interrupts(s);



    /* Make sure everything is in place before device activation */

    smp_wmb();



    vmxnet3_reset_mac(s);



    s->device_active = true;

}
