This patch implements the resize function of the rx queues.
Based on this function, it is possible to modify the ring num of the
queue.
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
---
drivers/net/virtio_net.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 9fe222a3663a..6ab16fd193e5 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -278,6 +278,8 @@ struct padded_vnet_hdr {
char padding[12];
};
+static void virtnet_rq_free_unused_buf(struct virtqueue *vq, void *buf);
+
static bool is_xdp_frame(void *ptr)
{
return (unsigned long)ptr & VIRTIO_XDP_FLAG;
@@ -1846,6 +1848,26 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
+static int virtnet_rx_resize(struct virtnet_info *vi,
+ struct receive_queue *rq, u32 ring_num)
+{
+ int err, qindex;
+
+ qindex = rq - vi->rq;
+
+ napi_disable(&rq->napi);
+
+ err = virtqueue_resize(rq->vq, ring_num, virtnet_rq_free_unused_buf);
+ if (err)
+ netdev_err(vi->dev, "resize rx fail: rx queue index: %d err: %d\n", qindex, err);
+
+ if (!try_fill_recv(vi, rq, GFP_KERNEL))
+ schedule_delayed_work(&vi->refill, 0);
+
+ virtnet_napi_enable(rq->vq, &rq->napi);
+ return err;
+}
+
/*
* Send command via the control virtqueue and check status. Commands
* supported by the hypervisor, as indicated by feature bits, should
--
2.31.0
