This patch implements both userspace and vhost support for multiple queue virtio-net (VIRTIO_NET_F_MQ). This is done by introducing an array of VirtIONetQueue to VirtIONet. Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx> --- hw/virtio-net.c | 318 ++++++++++++++++++++++++++++++++++++++++++------------- hw/virtio-net.h | 27 +++++- 2 files changed, 271 insertions(+), 74 deletions(-) diff --git a/hw/virtio-net.c b/hw/virtio-net.c index c6f0915..aaeef1b 100644 --- a/hw/virtio-net.c +++ b/hw/virtio-net.c @@ -45,7 +45,7 @@ typedef struct VirtIONet VirtIODevice vdev; uint8_t mac[ETH_ALEN]; uint16_t status; - VirtIONetQueue vq; + VirtIONetQueue vqs[MAX_QUEUE_NUM]; VirtQueue *ctrl_vq; NICState *nic; uint32_t tx_timeout; @@ -70,14 +70,23 @@ typedef struct VirtIONet } mac_table; uint32_t *vlans; DeviceState *qdev; + int multiqueue; + uint16_t max_queues; + uint16_t curr_queues; } VirtIONet; -static VirtIONetQueue *virtio_net_get_queue(NetClientState *nc) +static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) { VirtIONet *n = qemu_get_nic_opaque(nc); - return &n->vq; + return &n->vqs[nc->queue_index]; } + +static int vq2q(int queue_index) +{ + return queue_index / 2; +} + /* TODO * - we could suppress RX interrupt if we were so inclined. */ @@ -93,6 +102,7 @@ static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) struct virtio_net_config netcfg; stw_p(&netcfg.status, n->status); + stw_p(&netcfg.max_virtqueue_pairs, n->max_queues); memcpy(netcfg.mac, n->mac, ETH_ALEN); memcpy(config, &netcfg, sizeof(netcfg)); } @@ -116,31 +126,33 @@ static bool virtio_net_started(VirtIONet *n, uint8_t status) (n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; } -static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) +static void virtio_net_vhost_status(VirtIONet *n, int queue_index, + uint8_t status) { - VirtIONetQueue *q = &n->vq; + NetClientState *nc = qemu_get_subqueue(n->nic, queue_index); + VirtIONetQueue *q = &n->vqs[queue_index]; - if (!qemu_get_queue(n->nic)->peer) { + if (!nc->peer) { return; } - if (qemu_get_queue(n->nic)->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { + if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { return; } - if (!tap_get_vhost_net(qemu_get_queue(n->nic)->peer)) { + if (!tap_get_vhost_net(nc->peer)) { return; } - if (!!q->vhost_started == virtio_net_started(n, status) && - !qemu_get_queue(n->nic)->peer->link_down) { + if (!!q->vhost_started == + (virtio_net_started(n, status) && !nc->peer->link_down)) { return; } if (!q->vhost_started) { int r; - if (!vhost_net_query(tap_get_vhost_net(qemu_get_queue(n->nic)->peer), &n->vdev)) { + if (!vhost_net_query(tap_get_vhost_net(nc->peer), &n->vdev)) { return; } - r = vhost_net_start(tap_get_vhost_net(qemu_get_queue(n->nic)->peer), - &n->vdev, 0); + r = vhost_net_start(tap_get_vhost_net(nc->peer), &n->vdev, + queue_index * 2); if (r < 0) { error_report("unable to start vhost net: %d: " "falling back on userspace virtio", -r); @@ -148,7 +160,7 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) q->vhost_started = 1; } } else { - vhost_net_stop(tap_get_vhost_net(qemu_get_queue(n->nic)->peer), &n->vdev); + vhost_net_stop(tap_get_vhost_net(nc->peer), &n->vdev); q->vhost_started = 0; } } @@ -156,26 +168,35 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) { VirtIONet *n = to_virtio_net(vdev); - VirtIONetQueue *q = &n->vq; + int i; - virtio_net_vhost_status(n, status); + for (i = 0; i < n->max_queues; i++) { + VirtIONetQueue *q = &n->vqs[i]; + uint8_t queue_status = status; - if (!q->tx_waiting) { - return; - } + if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { + queue_status = 0; + } - if (virtio_net_started(n, status) && !q->vhost_started) { - if (q->tx_timer) { - qemu_mod_timer(q->tx_timer, - qemu_get_clock_ns(vm_clock) + n->tx_timeout); - } else { - qemu_bh_schedule(q->tx_bh); + virtio_net_vhost_status(n, i, queue_status); + + if (!q->tx_waiting) { + continue; } - } else { - if (q->tx_timer) { - qemu_del_timer(q->tx_timer); + + if (virtio_net_started(n, status) && !q->vhost_started) { + if (q->tx_timer) { + qemu_mod_timer(q->tx_timer, + qemu_get_clock_ns(vm_clock) + n->tx_timeout); + } else { + qemu_bh_schedule(q->tx_bh); + } } else { - qemu_bh_cancel(q->tx_bh); + if (q->tx_timer) { + qemu_del_timer(q->tx_timer); + } else { + qemu_bh_cancel(q->tx_bh); + } } } } @@ -207,6 +228,8 @@ static void virtio_net_reset(VirtIODevice *vdev) n->nomulti = 0; n->nouni = 0; n->nobcast = 0; + /* multiqueue is disalbed by default */ + n->curr_queues = 1; /* Flush any MAC and VLAN filter table state */ n->mac_table.in_use = 0; @@ -245,18 +268,72 @@ static int peer_has_ufo(VirtIONet *n) static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs) { + int i; + NetClientState *nc; + n->mergeable_rx_bufs = mergeable_rx_bufs; n->guest_hdr_len = n->mergeable_rx_bufs ? sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); - if (peer_has_vnet_hdr(n) && - tap_has_vnet_hdr_len(qemu_get_queue(n->nic)->peer, n->guest_hdr_len)) { - tap_set_vnet_hdr_len(qemu_get_queue(n->nic)->peer, n->guest_hdr_len); - n->host_hdr_len = n->guest_hdr_len; + for (i = 0; i < n->max_queues; i++) { + nc = qemu_get_subqueue(n->nic, i); + + if (peer_has_vnet_hdr(n) && + tap_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { + tap_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); + n->host_hdr_len = n->guest_hdr_len; + } } } +static int peer_attach(VirtIONet *n, int index) +{ + NetClientState *nc = qemu_get_subqueue(n->nic, index); + int ret; + + if (!nc->peer) { + ret = -1; + } else if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { + ret = -1; + } else { + ret = tap_attach(nc->peer); + } + + return ret; +} + +static int peer_detach(VirtIONet *n, int index) +{ + NetClientState *nc = qemu_get_subqueue(n->nic, index); + int ret; + + if (!nc->peer) { + ret = -1; + } else if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { + ret = -1; + } else { + ret = tap_detach(nc->peer); + } + + return ret; +} + +static void virtio_net_set_queues(VirtIONet *n) +{ + int i; + + for (i = 0; i < n->max_queues; i++) { + if (i < n->curr_queues) { + assert(!peer_attach(n, i)); + } else { + assert(!peer_detach(n, i)); + } + } +} + +static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl); + static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) { VirtIONet *n = to_virtio_net(vdev); @@ -308,25 +385,33 @@ static uint32_t virtio_net_bad_features(VirtIODevice *vdev) static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) { VirtIONet *n = to_virtio_net(vdev); + int i; + + virtio_net_set_multiqueue(n, !!(features & (1 << VIRTIO_NET_F_MQ)), + !!(features & (1 << VIRTIO_NET_F_CTRL_VQ))); virtio_net_set_mrg_rx_bufs(n, !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF))); if (n->has_vnet_hdr) { - tap_set_offload(qemu_get_queue(n->nic)->peer, + tap_set_offload(qemu_get_subqueue(n->nic, 0)->peer, (features >> VIRTIO_NET_F_GUEST_CSUM) & 1, (features >> VIRTIO_NET_F_GUEST_TSO4) & 1, (features >> VIRTIO_NET_F_GUEST_TSO6) & 1, (features >> VIRTIO_NET_F_GUEST_ECN) & 1, (features >> VIRTIO_NET_F_GUEST_UFO) & 1); } - if (!qemu_get_queue(n->nic)->peer || - qemu_get_queue(n->nic)->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { - return; - } - if (!tap_get_vhost_net(qemu_get_queue(n->nic)->peer)) { - return; + + for (i = 0; i < n->max_queues; i++) { + NetClientState *nc = qemu_get_subqueue(n->nic, i); + + if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { + continue; + } + if (!tap_get_vhost_net(nc->peer)) { + continue; + } + vhost_net_ack_features(tap_get_vhost_net(nc->peer), features); } - vhost_net_ack_features(tap_get_vhost_net(qemu_get_queue(n->nic)->peer), features); } static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, @@ -436,6 +521,35 @@ static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, return VIRTIO_NET_OK; } +static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, + VirtQueueElement *elem) +{ + struct virtio_net_ctrl_mq s; + + if (elem->out_num != 2 || + elem->out_sg[1].iov_len != sizeof(struct virtio_net_ctrl_mq)) { + error_report("virtio-net ctrl invalid steering command"); + return VIRTIO_NET_ERR; + } + + if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { + return VIRTIO_NET_ERR; + } + + memcpy(&s, elem->out_sg[1].iov_base, sizeof(struct virtio_net_ctrl_mq)); + + if (s.virtqueue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || + s.virtqueue_pairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || + s.virtqueue_pairs > n->max_queues) { + return VIRTIO_NET_ERR; + } + + n->curr_queues = s.virtqueue_pairs; + virtio_net_set_queues(n); + virtio_net_set_status(&n->vdev, n->vdev.status); + + return VIRTIO_NET_OK; +} static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) { VirtIONet *n = to_virtio_net(vdev); @@ -464,6 +578,8 @@ static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) status = virtio_net_handle_mac(n, ctrl.cmd, &elem); else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); + else if (ctrl.class == VIRTIO_NET_CTRL_MQ) + status = virtio_net_handle_mq(n, ctrl.cmd, &elem); stb_p(elem.in_sg[elem.in_num - 1].iov_base, status); @@ -477,19 +593,24 @@ static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) { VirtIONet *n = to_virtio_net(vdev); + int queue_index = vq2q(virtio_get_queue_index(vq)); - qemu_flush_queued_packets(qemu_get_queue(n->nic)); + qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); } static int virtio_net_can_receive(NetClientState *nc) { VirtIONet *n = qemu_get_nic_opaque(nc); - VirtIONetQueue *q = virtio_net_get_queue(nc); + VirtIONetQueue *q = virtio_net_get_subqueue(nc); if (!n->vdev.vm_running) { return 0; } + if (nc->queue_index >= n->curr_queues) { + return 0; + } + if (!virtio_queue_ready(q->rx_vq) || !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { return 0; @@ -620,14 +741,15 @@ static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) { VirtIONet *n = qemu_get_nic_opaque(nc); - VirtIONetQueue *q = virtio_net_get_queue(nc); + VirtIONetQueue *q = virtio_net_get_subqueue(nc); struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; struct virtio_net_hdr_mrg_rxbuf mhdr; unsigned mhdr_cnt = 0; size_t offset, i, guest_offset; - if (!virtio_net_can_receive(qemu_get_queue(n->nic))) + if (!virtio_net_can_receive(nc)) { return -1; + } /* hdr_len refers to the header we supply to the guest */ if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { @@ -720,7 +842,7 @@ static int32_t virtio_net_flush_tx(VirtIONetQueue *q); static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) { VirtIONet *n = qemu_get_nic_opaque(nc); - VirtIONetQueue *q = virtio_net_get_queue(nc); + VirtIONetQueue *q = virtio_net_get_subqueue(nc); virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); virtio_notify(&n->vdev, q->tx_vq); @@ -737,6 +859,7 @@ static int32_t virtio_net_flush_tx(VirtIONetQueue *q) VirtIONet *n = q->n; VirtQueueElement elem; int32_t num_packets = 0; + int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { return num_packets; } @@ -778,8 +901,8 @@ static int32_t virtio_net_flush_tx(VirtIONetQueue *q) len = n->guest_hdr_len; - ret = qemu_sendv_packet_async(qemu_get_queue(n->nic), out_sg, out_num, - virtio_net_tx_complete); + ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), + out_sg, out_num, virtio_net_tx_complete); if (ret == 0) { virtio_queue_set_notification(q->tx_vq, 0); q->async_tx.elem = elem; @@ -802,7 +925,7 @@ static int32_t virtio_net_flush_tx(VirtIONetQueue *q) static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) { VirtIONet *n = to_virtio_net(vdev); - VirtIONetQueue *q = &n->vq; + VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; /* This happens when device was stopped but VCPU wasn't. */ if (!n->vdev.vm_running) { @@ -826,7 +949,7 @@ static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) { VirtIONet *n = to_virtio_net(vdev); - VirtIONetQueue *q = &n->vq; + VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; if (unlikely(q->tx_waiting)) { return; @@ -894,10 +1017,49 @@ static void virtio_net_tx_bh(void *opaque) } } +static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl) +{ + VirtIODevice *vdev = &n->vdev; + int i; + + n->multiqueue = multiqueue; + + if (!multiqueue) + n->curr_queues = 1; + + for (i = 2; i <= n->max_queues * 2 + 1; i++) { + virtio_del_queue(vdev, i); + } + + for (i = 1; i < n->max_queues; i++) { + n->vqs[i].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); + if (n->vqs[i].tx_timer) { + n->vqs[i].tx_vq = + virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); + n->vqs[i].tx_timer = qemu_new_timer_ns(vm_clock, + virtio_net_tx_timer, + &n->vqs[i]); + } else { + n->vqs[i].tx_vq = + virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); + n->vqs[i].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[i]); + } + + n->vqs[i].tx_waiting = 0; + n->vqs[i].n = n; + } + + if (ctrl) { + n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); + } + + virtio_net_set_queues(n); +} + static void virtio_net_save(QEMUFile *f, void *opaque) { VirtIONet *n = opaque; - VirtIONetQueue *q = &n->vq; + VirtIONetQueue *q = &n->vqs[0]; /* At this point, backend must be stopped, otherwise * it might keep writing to memory. */ @@ -926,9 +1088,8 @@ static void virtio_net_save(QEMUFile *f, void *opaque) static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) { VirtIONet *n = opaque; - VirtIONetQueue *q = &n->vq; - int i; - int ret; + VirtIONetQueue *q = &n->vqs[0]; + int ret, i; if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) return -EINVAL; @@ -1044,6 +1205,7 @@ VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, virtio_net_conf *net) { VirtIONet *n; + int i; n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET, sizeof(struct virtio_net_config), @@ -1056,8 +1218,11 @@ VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, n->vdev.bad_features = virtio_net_bad_features; n->vdev.reset = virtio_net_reset; n->vdev.set_status = virtio_net_set_status; - n->vq.rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); - n->vq.n = n; + n->vqs[0].rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); + n->max_queues = conf->queues; + n->curr_queues = 1; + n->vqs[0].n = n; + n->tx_timeout = net->txtimer; if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { error_report("virtio-net: " @@ -1067,14 +1232,14 @@ VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, } if (net->tx && !strcmp(net->tx, "timer")) { - n->vq.tx_vq = virtio_add_queue(&n->vdev, 256, - virtio_net_handle_tx_timer); - n->vq.tx_timer = qemu_new_timer_ns(vm_clock, - virtio_net_tx_timer, &n->vq); - n->tx_timeout = net->txtimer; + n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, + virtio_net_handle_tx_timer); + n->vqs[0].tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer, + &n->vqs[0]); } else { - n->vq.tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_bh); - n->vq.tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vq); + n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, + virtio_net_handle_tx_bh); + n->vqs[0].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[0]); } n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl); qemu_macaddr_default_if_unset(&conf->macaddr); @@ -1084,7 +1249,9 @@ VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, n->nic = qemu_new_nic(&net_virtio_info, conf, object_get_typename(OBJECT(dev)), dev->id, n); peer_test_vnet_hdr(n); if (peer_has_vnet_hdr(n)) { - tap_using_vnet_hdr(qemu_get_queue(n->nic)->peer, 1); + for (i = 0; i < n->max_queues; i++) { + tap_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, 1); + } n->host_hdr_len = sizeof(struct virtio_net_hdr); } else { n->host_hdr_len = 0; @@ -1092,7 +1259,7 @@ VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, qemu_format_nic_info_str(qemu_get_queue(n->nic), conf->macaddr.a); - n->vq.tx_waiting = 0; + n->vqs[0].tx_waiting = 0; n->tx_burst = net->txburst; virtio_net_set_mrg_rx_bufs(n, 0); n->promisc = 1; /* for compatibility */ @@ -1113,23 +1280,28 @@ VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, void virtio_net_exit(VirtIODevice *vdev) { VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); - VirtIONetQueue *q = &n->vq; + int i; /* This will stop vhost backend if appropriate. */ virtio_net_set_status(vdev, 0); - qemu_purge_queued_packets(qemu_get_queue(n->nic)); - unregister_savevm(n->qdev, "virtio-net", n); g_free(n->mac_table.macs); g_free(n->vlans); - if (q->tx_timer) { - qemu_del_timer(q->tx_timer); - qemu_free_timer(q->tx_timer); - } else { - qemu_bh_delete(q->tx_bh); + for (i = 0; i < n->max_queues; i++) { + VirtIONetQueue *q = &n->vqs[i]; + NetClientState *nc = qemu_get_subqueue(n->nic, i); + + qemu_purge_queued_packets(nc); + + if (q->tx_timer) { + qemu_del_timer(q->tx_timer); + qemu_free_timer(q->tx_timer); + } else { + qemu_bh_delete(q->tx_bh); + } } qemu_del_nic(n->nic); diff --git a/hw/virtio-net.h b/hw/virtio-net.h index 36aa463..bc5857a 100644 --- a/hw/virtio-net.h +++ b/hw/virtio-net.h @@ -44,6 +44,8 @@ #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */ #define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */ #define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */ +#define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow + * Steering */ #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ @@ -72,6 +74,8 @@ struct virtio_net_config uint8_t mac[ETH_ALEN]; /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */ uint16_t status; + /* Max virtqueue pairs supported by the device */ + uint16_t max_virtqueue_pairs; } QEMU_PACKED; /* This is the first element of the scatter-gather list. If you don't @@ -168,6 +172,26 @@ struct virtio_net_ctrl_mac { #define VIRTIO_NET_CTRL_VLAN_ADD 0 #define VIRTIO_NET_CTRL_VLAN_DEL 1 +/* + * Control Multiqueue + * + * The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET + * enables multiqueue, specifying the number of the transmit and + * receive queues that will be used. After the command is consumed and acked by + * the device, the device will not steer new packets on receive virtqueues + * other than specified nor read from transmit virtqueues other than specified. + * Accordingly, driver should not transmit new packets on virtqueues other than + * specified. + */ +struct virtio_net_ctrl_mq { + uint16_t virtqueue_pairs; +}; + +#define VIRTIO_NET_CTRL_MQ 4 + #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0 + #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1 + #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000 + #define DEFINE_VIRTIO_NET_FEATURES(_state, _field) \ DEFINE_VIRTIO_COMMON_FEATURES(_state, _field), \ DEFINE_PROP_BIT("csum", _state, _field, VIRTIO_NET_F_CSUM, true), \ @@ -186,5 +210,6 @@ struct virtio_net_ctrl_mac { DEFINE_PROP_BIT("ctrl_vq", _state, _field, VIRTIO_NET_F_CTRL_VQ, true), \ DEFINE_PROP_BIT("ctrl_rx", _state, _field, VIRTIO_NET_F_CTRL_RX, true), \ DEFINE_PROP_BIT("ctrl_vlan", _state, _field, VIRTIO_NET_F_CTRL_VLAN, true), \ - DEFINE_PROP_BIT("ctrl_rx_extra", _state, _field, VIRTIO_NET_F_CTRL_RX_EXTRA, true) + DEFINE_PROP_BIT("ctrl_rx_extra", _state, _field, VIRTIO_NET_F_CTRL_RX_EXTRA, true), \ + DEFINE_PROP_BIT("mq", _state, _field, VIRTIO_NET_F_MQ, true) #endif -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html