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authorNimrod Andy <B38611@freescale.com>2014-06-12 08:16:19 +0800
committerDavid S. Miller <davem@davemloft.net>2014-06-12 11:01:57 -0700
commit96c50caa5148e0e0a077672574785700885c6764 (patch)
tree0fee259417371589404fa1732072f0df82e9753e
parent61a4427b955f79dfaa735788511ce558962c9d70 (diff)
net: fec: Enable IP header hardware checksum
IP header checksum is calcalated by network layer in default. To support software TSO, it is better to use HW calculate the IP header checksum. FEC hw checksum feature request the checksum field in frame is zero, otherwise the calculative CRC is not correct. For segmentated TCP packet, HW calculate the IP header checksum again, it doesn't bring any impact. For SW TSO, HW calculated checksum bring better performance. Signed-off-by: Fugang Duan <B38611@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/freescale/fec_main.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index ee8e5477c819..55b55d2f73bc 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -314,6 +314,7 @@ fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev)
if (unlikely(skb_cow_head(skb, 0)))
return -1;
+ ip_hdr(skb)->check = 0;
*(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) = 0;
return 0;
@@ -395,7 +396,7 @@ static int txq_submit_skb(struct sk_buff *skb, struct net_device *ndev)
* are done by the kernel
*/
if (skb->ip_summed == CHECKSUM_PARTIAL)
- ebdp->cbd_esc |= BD_ENET_TX_PINS;
+ ebdp->cbd_esc |= BD_ENET_TX_PINS | BD_ENET_TX_IINS;
}
}