From db849faa9bef993a1379dc510623f750a72fa7ce Mon Sep 17 00:00:00 2001 From: Saeed Mahameed Date: Fri, 3 May 2019 13:14:59 -0700 Subject: net/mlx5e: Rx, Fix checksum calculation for new hardware CQE checksum full mode in new HW, provides a full checksum of rx frame. Covering bytes starting from eth protocol up to last byte in the received frame (frame_size - ETH_HLEN), as expected by the stack. Fixing up skb->csum by the driver is not required in such case. This fix is to avoid wrong checksum calculation in drivers which already support the new hardware with the new checksum mode. Fixes: 85327a9c4150 ("net/mlx5: Update the list of the PCI supported devices") Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 1 + drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 3 +++ drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 7 ++++++- include/linux/mlx5/mlx5_ifc.h | 3 ++- 4 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h index cc6797e24571..cc227a7aa79f 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -294,6 +294,7 @@ enum { MLX5E_RQ_STATE_ENABLED, MLX5E_RQ_STATE_AM, MLX5E_RQ_STATE_NO_CSUM_COMPLETE, + MLX5E_RQ_STATE_CSUM_FULL, /* cqe_csum_full hw bit is set */ }; struct mlx5e_cq { diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index a8e8350b38aa..98d75271fc73 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -855,6 +855,9 @@ static int mlx5e_open_rq(struct mlx5e_channel *c, if (err) goto err_destroy_rq; + if (MLX5_CAP_ETH(c->mdev, cqe_checksum_full)) + __set_bit(MLX5E_RQ_STATE_CSUM_FULL, &c->rq.state); + if (params->rx_dim_enabled) __set_bit(MLX5E_RQ_STATE_AM, &c->rq.state); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 13133e7f088e..8a5f9411cac6 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -873,8 +873,14 @@ static inline void mlx5e_handle_csum(struct net_device *netdev, if (unlikely(get_ip_proto(skb, network_depth, proto) == IPPROTO_SCTP)) goto csum_unnecessary; + stats->csum_complete++; skb->ip_summed = CHECKSUM_COMPLETE; skb->csum = csum_unfold((__force __sum16)cqe->check_sum); + + if (test_bit(MLX5E_RQ_STATE_CSUM_FULL, &rq->state)) + return; /* CQE csum covers all received bytes */ + + /* csum might need some fixups ...*/ if (network_depth > ETH_HLEN) /* CQE csum is calculated from the IP header and does * not cover VLAN headers (if present). This will add @@ -885,7 +891,6 @@ static inline void mlx5e_handle_csum(struct net_device *netdev, skb->csum); mlx5e_skb_padding_csum(skb, network_depth, proto, stats); - stats->csum_complete++; return; } diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h index 5e74305e2e57..7e42efa143a0 100644 --- a/include/linux/mlx5/mlx5_ifc.h +++ b/include/linux/mlx5/mlx5_ifc.h @@ -749,7 +749,8 @@ struct mlx5_ifc_per_protocol_networking_offload_caps_bits { u8 swp[0x1]; u8 swp_csum[0x1]; u8 swp_lso[0x1]; - u8 reserved_at_23[0xd]; + u8 cqe_checksum_full[0x1]; + u8 reserved_at_24[0xc]; u8 max_vxlan_udp_ports[0x8]; u8 reserved_at_38[0x6]; u8 max_geneve_opt_len[0x1]; -- cgit v1.2.3-55-g7522