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net/mlx5e: IPSEC RX, enable checksum complete

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[ Upstream commit f9a10440f0 ]

Currently in Rx data path IPsec crypto offloaded packets uses
csum_none flag, so checksum is handled by the stack, this naturally
have some performance/cpu utilization impact on such flows. As Nvidia
NIC starting from ConnectX6DX provides checksum complete value out of
the box also for such flows there is no sense in taking csum_none path,
furthermore the stack (xfrm) have the method to handle checksum complete
corrections for such flows i.e. IPsec trailer removal and consequently
checksum value adjustment.

Because of the above and in addition the ConnectX6DX is the first HW
which supports IPsec crypto offload then it is safe to report csum
complete for IPsec offloaded traffic.

Fixes: b2ac7541e3 ("net/mlx5e: IPsec: Add Connect-X IPsec Rx data path offload")
Signed-off-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Raed Salem
2021-08-26 17:07:17 +03:00
committed by Greg Kroah-Hartman
parent 064faa8e8a
commit d70cb6c77a
1 changed files with 1 additions and 6 deletions
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7
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
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@@ -999,14 +999,9 @@ static inline void mlx5e_handle_csum(struct net_device *netdev,
goto csum_unnecessary;
if (likely(is_last_ethertype_ip(skb, &network_depth, &proto))) {
u8 ipproto = get_ip_proto(skb, network_depth, proto);
if (unlikely(ipproto == IPPROTO_SCTP))
if (unlikely(get_ip_proto(skb, network_depth, proto) == IPPROTO_SCTP))
goto csum_unnecessary;
if (unlikely(mlx5_ipsec_is_rx_flow(cqe)))
goto csum_none;
stats->csum_complete++;
skb->ip_summed = CHECKSUM_COMPLETE;
skb->csum = csum_unfold((__force __sum16)cqe->check_sum);