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authorMark McLoughlin <markmc@redhat.com>2008-11-26 08:58:11 -0500
committerRusty Russell <rusty@rustcorp.com.au>2008-12-02 06:42:49 -0500
commit39da5814db81e8fe9782ae5ea24c0fdfcf2adc96 (patch)
tree3483a6cc7af96d5cb5f1215afe3e67f4b80336cc /drivers
parent6976a1d6c222c50ac93d2273b9cf57e6fd047e59 (diff)
virtio_net: large tx MTU support
We don't really have a max tx packet size limit, so allow configuring the device with up to 64k tx MTU. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/virtio_net.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index e6b5d6ef9ea8..71ca29cc184d 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -613,6 +613,17 @@ static struct ethtool_ops virtnet_ethtool_ops = {
613 .set_tso = ethtool_op_set_tso, 613 .set_tso = ethtool_op_set_tso,
614}; 614};
615 615
616#define MIN_MTU 68
617#define MAX_MTU 65535
618
619static int virtnet_change_mtu(struct net_device *dev, int new_mtu)
620{
621 if (new_mtu < MIN_MTU || new_mtu > MAX_MTU)
622 return -EINVAL;
623 dev->mtu = new_mtu;
624 return 0;
625}
626
616static int virtnet_probe(struct virtio_device *vdev) 627static int virtnet_probe(struct virtio_device *vdev)
617{ 628{
618 int err; 629 int err;
@@ -628,6 +639,7 @@ static int virtnet_probe(struct virtio_device *vdev)
628 dev->open = virtnet_open; 639 dev->open = virtnet_open;
629 dev->stop = virtnet_close; 640 dev->stop = virtnet_close;
630 dev->hard_start_xmit = start_xmit; 641 dev->hard_start_xmit = start_xmit;
642 dev->change_mtu = virtnet_change_mtu;
631 dev->features = NETIF_F_HIGHDMA; 643 dev->features = NETIF_F_HIGHDMA;
632#ifdef CONFIG_NET_POLL_CONTROLLER 644#ifdef CONFIG_NET_POLL_CONTROLLER
633 dev->poll_controller = virtnet_netpoll; 645 dev->poll_controller = virtnet_netpoll;