Support set_ringparam based on virtio queue reset.
The rx,tx_pending required to be passed must be power of 2.
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
---
drivers/net/virtio_net.c | 50 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index f9bb760c6dbd..bf460ea87354 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2308,6 +2308,55 @@ static void virtnet_get_ringparam(struct net_device *dev,
ring->tx_pending = virtqueue_get_vring_size(vi->sq[0].vq);
}
+static int virtnet_set_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *ring,
+ struct kernel_ethtool_ringparam *kernel_ring,
+ struct netlink_ext_ack *extack)
+{
+ struct virtnet_info *vi = netdev_priv(dev);
+ u32 rx_pending, tx_pending;
+ int i, err;
+
+ if (ring->rx_mini_pending || ring->rx_jumbo_pending)
+ return -EINVAL;
+
+ rx_pending = virtqueue_get_vring_size(vi->rq[0].vq);
+ tx_pending = virtqueue_get_vring_size(vi->sq[0].vq);
+
+ if (ring->rx_pending == rx_pending &&
+ ring->tx_pending == tx_pending)
+ return 0;
+
+ if (ring->rx_pending > virtqueue_get_vring_max_size(vi->rq[0].vq))
+ return -EINVAL;
+
+ if (ring->tx_pending > virtqueue_get_vring_max_size(vi->sq[0].vq))
+ return -EINVAL;
+
+ if (!is_power_of_2(ring->rx_pending))
+ return -EINVAL;
+
+ if (!is_power_of_2(ring->tx_pending))
+ return -EINVAL;
+
+ for (i = 0; i < vi->max_queue_pairs; i++) {
+ if (ring->tx_pending != tx_pending) {
+ virtio_set_max_ring_num(vi->vdev, ring->tx_pending);
+ err = virtnet_tx_vq_reset(vi, i);
+ if (err)
+ return err;
+ }
+
+ if (ring->rx_pending != rx_pending) {
+ virtio_set_max_ring_num(vi->vdev, ring->rx_pending);
+ err = virtnet_rx_vq_reset(vi, i);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
static void virtnet_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
@@ -2541,6 +2590,7 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
.get_drvinfo = virtnet_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_ringparam = virtnet_get_ringparam,
+ .set_ringparam = virtnet_set_ringparam,
.get_strings = virtnet_get_strings,
.get_sset_count = virtnet_get_sset_count,
.get_ethtool_stats = virtnet_get_ethtool_stats,
--
2.31.0
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