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sunvnet: add GSO support 

This patch adds GSO support to the sunvnet driver.

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 15:31:30 -05:00 committed by David S. Miller
parent 1b6b0a477a
commit 9a72dd4d6b
1 changed files with 72 additions and 1 deletions
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73
drivers/net/ethernet/sun/sunvnet.c
View File

@ -1102,6 +1102,10 @@ static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies)
return NULL;
}
(void)skb_put(nskb, skb->len);
if (skb_is_gso(skb)) {
skb_shinfo(nskb)->gso_size = skb_shinfo(skb)->gso_size;
skb_shinfo(nskb)->gso_type = skb_shinfo(skb)->gso_type;
}
dev_kfree_skb(skb);
skb = nskb;
}
@ -1120,6 +1124,66 @@ vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
return port->q_index;
}
static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev);
static int vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb)
{
struct net_device *dev = port->vp->dev;
struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
struct sk_buff *segs;
int maclen;
int status;
if (unlikely(vnet_tx_dring_avail(dr) < skb_shinfo(skb)->gso_segs)) {
struct netdev_queue *txq;
txq = netdev_get_tx_queue(dev, port->q_index);
netif_tx_stop_queue(txq);
if (vnet_tx_dring_avail(dr) < skb_shinfo(skb)->gso_segs)
return NETDEV_TX_BUSY;
netif_tx_wake_queue(txq);
}
maclen = skb_network_header(skb) - skb_mac_header(skb);
skb_pull(skb, maclen);
segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO);
if (IS_ERR(segs)) {
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
skb_push(skb, maclen);
skb_reset_mac_header(skb);
status = 0;
while (segs) {
struct sk_buff *curr = segs;
segs = segs->next;
curr->next = NULL;
skb_push(curr, maclen);
skb_reset_mac_header(curr);
memcpy(skb_mac_header(curr), skb_mac_header(skb),
maclen);
curr->csum_start = skb_transport_header(curr) - curr->head;
if (ip_hdr(curr)->protocol == IPPROTO_TCP)
curr->csum_offset = offsetof(struct tcphdr, check);
else if (ip_hdr(curr)->protocol == IPPROTO_UDP)
curr->csum_offset = offsetof(struct udphdr, check);
if (!(status & NETDEV_TX_MASK))
status = vnet_start_xmit(curr, dev);
if (status & NETDEV_TX_MASK)
dev_kfree_skb_any(curr);
}
if (!(status & NETDEV_TX_MASK))
dev_kfree_skb_any(skb);
return status;
}
static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct vnet *vp = netdev_priv(dev);
@ -1139,6 +1203,12 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
goto out_dropped;
}
if (skb_is_gso(skb)) {
err = vnet_handle_offloads(port, skb);
rcu_read_unlock();
return err;
}
if (skb->len > port->rmtu) {
unsigned long localmtu = port->rmtu - ETH_HLEN;
@ -1642,7 +1712,8 @@ 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_HW_CSUM | NETIF_F_SG;
dev->hw_features = NETIF_F_GSO | NETIF_F_GSO_SOFTWARE |
NETIF_F_HW_CSUM | NETIF_F_SG;
dev->features = dev->hw_features;
err = register_netdev(dev);