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be2net: changes for checksum and segmentation offload 

- Enables Rx checksum feature by default.
- Disables support for ipv6 tso.
- Changes in Rx path to handle Rx completions with various checksum options.

Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ajit Khaparde 2009-04-13 15:41:22 -07:00 committed by David S. Miller
parent 8d1c3c0746
commit 728a9972d1
1 changed files with 22 additions and 6 deletions
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28
drivers/net/benet/be_main.c
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@ -637,6 +637,22 @@ static void be_rx_stats_update(struct be_adapter *adapter,
stats->be_rx_bytes += pktsize;
}
static inline bool do_pkt_csum(struct be_eth_rx_compl *rxcp, bool cso)
{
u8 l4_cksm, ip_version, ipcksm, tcpf = 0, udpf = 0, ipv6_chk;
l4_cksm = AMAP_GET_BITS(struct amap_eth_rx_compl, l4_cksm, rxcp);
ipcksm = AMAP_GET_BITS(struct amap_eth_rx_compl, ipcksm, rxcp);
ip_version = AMAP_GET_BITS(struct amap_eth_rx_compl, ip_version, rxcp);
if (ip_version) {
tcpf = AMAP_GET_BITS(struct amap_eth_rx_compl, tcpf, rxcp);
udpf = AMAP_GET_BITS(struct amap_eth_rx_compl, udpf, rxcp);
}
ipv6_chk = (ip_version && (tcpf || udpf));
return ((l4_cksm && ipv6_chk && ipcksm) && cso) ? false : true;
}
static struct be_rx_page_info *
get_rx_page_info(struct be_adapter *adapter, u16 frag_idx)
{
@ -752,9 +768,7 @@ static void be_rx_compl_process(struct be_adapter *adapter,
{
struct sk_buff *skb;
u32 vtp, vid;
int l4_cksm;
l4_cksm = AMAP_GET_BITS(struct amap_eth_rx_compl, l4_cksm, rxcp);
vtp = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp);
skb = netdev_alloc_skb(adapter->netdev, BE_HDR_LEN + NET_IP_ALIGN);
@ -769,10 +783,10 @@ static void be_rx_compl_process(struct be_adapter *adapter,
skb_fill_rx_data(adapter, skb, rxcp);
if (l4_cksm && adapter->rx_csum)
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
if (do_pkt_csum(rxcp, adapter->rx_csum))
skb->ip_summed = CHECKSUM_NONE;
else
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->truesize = skb->len + sizeof(struct sk_buff);
skb->protocol = eth_type_trans(skb, adapter->netdev);
@ -1626,10 +1640,12 @@ static void be_netdev_init(struct net_device *netdev)
netdev->features |= NETIF_F_SG | NETIF_F_HW_VLAN_RX | NETIF_F_TSO |
NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER | NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM | NETIF_F_TSO6;
NETIF_F_IPV6_CSUM;
netdev->flags |= IFF_MULTICAST;
adapter->rx_csum = true;
BE_SET_NETDEV_OPS(netdev, &be_netdev_ops);
SET_ETHTOOL_OPS(netdev, &be_ethtool_ops);