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sunvnet: add checksum offload support

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This patch adds support for sender-side checksum offloading.

Signed-off-by: David L Stevens <david.stevens@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David L Stevens 2014-12-02 15:31:22 -05:00 committed by David S. Miller
parent da38c56417
commit 1b6b0a477a
1 changed files with 34 additions and 3 deletions
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37
drivers/net/ethernet/sun/sunvnet.c
View file

@ -375,6 +375,8 @@ static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc)
}
}
skb->ip_summed = port->switch_port ? CHECKSUM_NONE : CHECKSUM_PARTIAL;
dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
napi_gro_receive(&port->napi, skb);
@ -1047,7 +1049,8 @@ static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies)
if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP ||
skb_tailroom(skb) < pad ||
skb_headroom(skb) < VNET_PACKET_SKIP || docopy) {
int offset;
int start = 0, offset;
__wsum csum;
len = skb->len > ETH_ZLEN ? skb->len : ETH_ZLEN;
nskb = alloc_and_align_skb(skb->dev, len);
@ -1065,10 +1068,35 @@ static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies)
offset = skb_transport_header(skb) - skb->data;
skb_set_transport_header(nskb, offset);
offset = 0;
nskb->csum_offset = skb->csum_offset;
nskb->ip_summed = skb->ip_summed;
if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
if (skb->ip_summed == CHECKSUM_PARTIAL)
start = skb_checksum_start_offset(skb);
if (start) {
struct iphdr *iph = ip_hdr(nskb);
int offset = start + nskb->csum_offset;
if (skb_copy_bits(skb, 0, nskb->data, start)) {
dev_kfree_skb(nskb);
dev_kfree_skb(skb);
return NULL;
}
*(__sum16 *)(skb->data + offset) = 0;
csum = skb_copy_and_csum_bits(skb, start,
nskb->data + start,
skb->len - start, 0);
if (iph->protocol == IPPROTO_TCP ||
iph->protocol == IPPROTO_UDP) {
csum = csum_tcpudp_magic(iph->saddr, iph->daddr,
skb->len - start,
iph->protocol, csum);
}
*(__sum16 *)(nskb->data + offset) = csum;
nskb->ip_summed = CHECKSUM_NONE;
} else if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
dev_kfree_skb(nskb);
dev_kfree_skb(skb);
return NULL;
@ -1150,6 +1178,9 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
goto out_dropped;
}
if (skb->ip_summed == CHECKSUM_PARTIAL)
vnet_fullcsum(skb);
dr = &port->vio.drings[VIO_DRIVER_TX_RING];
i = skb_get_queue_mapping(skb);
txq = netdev_get_tx_queue(dev, i);
@ -1611,7 +1642,7 @@ static struct vnet *vnet_new(const u64 *local_mac)
dev->ethtool_ops = &vnet_ethtool_ops;
dev->watchdog_timeo = VNET_TX_TIMEOUT;
dev->hw_features = NETIF_F_SG;
dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG;
dev->features = dev->hw_features;
err = register_netdev(dev);