diff options
| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2024-07-08 19:25:34 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-07-14 20:32:38 -0700 |
| commit | 19a5a7710ee1c60e491e326f9107666435f94044 (patch) | |
| tree | eb6c6040e415650aa355b548fbe55d324f23fc71 /drivers/net/virtio_net.c | |
| parent | 09d2b3182c8e3a215a9b2a1834f81dd07305989f (diff) | |
| download | lwn-19a5a7710ee1c60e491e326f9107666435f94044.tar.gz lwn-19a5a7710ee1c60e491e326f9107666435f94044.zip | |
virtio_net: xsk: support wakeup
xsk wakeup is used to trigger the logic for xsk xmit by xsk framework or
user.
Virtio-net does not support to actively generate an interruption, so it
tries to trigger tx NAPI on the local cpu.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://patch.msgid.link/20240708112537.96291-8-xuanzhuo@linux.alibaba.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/virtio_net.c')
| -rw-r--r-- | drivers/net/virtio_net.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index c4f5ebd10092..665b4925e545 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1054,6 +1054,29 @@ static void check_sq_full_and_disable(struct virtnet_info *vi, } } +static int virtnet_xsk_wakeup(struct net_device *dev, u32 qid, u32 flag) +{ + struct virtnet_info *vi = netdev_priv(dev); + struct send_queue *sq; + + if (!netif_running(dev)) + return -ENETDOWN; + + if (qid >= vi->curr_queue_pairs) + return -EINVAL; + + sq = &vi->sq[qid]; + + if (napi_if_scheduled_mark_missed(&sq->napi)) + return 0; + + local_bh_disable(); + virtqueue_napi_schedule(&sq->napi, sq->vq); + local_bh_enable(); + + return 0; +} + static int __virtnet_xdp_xmit_one(struct virtnet_info *vi, struct send_queue *sq, struct xdp_frame *xdpf) @@ -5399,6 +5422,7 @@ static const struct net_device_ops virtnet_netdev = { .ndo_vlan_rx_kill_vid = virtnet_vlan_rx_kill_vid, .ndo_bpf = virtnet_xdp, .ndo_xdp_xmit = virtnet_xdp_xmit, + .ndo_xsk_wakeup = virtnet_xsk_wakeup, .ndo_features_check = passthru_features_check, .ndo_get_phys_port_name = virtnet_get_phys_port_name, .ndo_set_features = virtnet_set_features, |