[PATCH net-next v6 06/10] virtio_net: xsk: support wakeup
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2024-06-18 07:56:57
Also in:
bpf, virtualization
Subsystem:
networking drivers, the rest, virtio net driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, "Michael S. Tsirkin", Jason Wang
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 <redacted> --- drivers/net/virtio_net.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index d8cce143be26..2bbc715f22c6 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c@@ -1032,6 +1032,29 @@ 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)
@@ -5312,6 +5335,7 @@ 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,
--
2.32.0.3.g01195cf9f