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[NET]: IPV6 checksum offloading in network devices

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The existing model for checksum offload does not correctly handle
devices that can offload IPV4 and IPV6 only. The NETIF_F_HW_CSUM flag
implies device can do any arbitrary protocol.

This patch:
 * adds NETIF_F_IPV6_CSUM for those devices
 * fixes bnx2 and tg3 devices that need it
 * add NETIF_F_IPV6_CSUM to ipv6 output (incl GSO)
 * fixes assumptions about NETIF_F_ALL_CSUM in nat
 * adjusts bridge union of checksumming computation

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2007-06-27 00:47:37 -07:00
committed by David S. Miller
parent d3d6dd3ada
commit d212f87b06
9 changed files with 49 additions and 17 deletions
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7
drivers/net/tg3.c
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@@ -11944,12 +11944,11 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
* checksumming.
*/
if ((tp->tg3_flags & TG3_FLAG_BROKEN_CHECKSUMS) == 0) {
dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755 ||
GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5787)
dev->features |= NETIF_F_HW_CSUM;
else
dev->features |= NETIF_F_IP_CSUM;
dev->features |= NETIF_F_SG;
dev->features |= NETIF_F_IPV6_CSUM;
tp->tg3_flags |= TG3_FLAG_RX_CHECKSUMS;
} else
tp->tg3_flags &= ~TG3_FLAG_RX_CHECKSUMS;