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net/mlx5e: Take SW parser code to a separate function 

Refactor mlx5e_ipsec_set_swp() code, split the part which sets the eseg
software parser (SWP) offsets and flags, so it can be used in a
downstream patch by other mlx5e functionality which needs to set eseg
SWP.
The new function mlx5e_set_eseg_swp() is useful for setting swp for both
outer and inner headers. It also handles the special ipsec case of xfrm
mode transfer.

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Moshe Shemesh 2019-03-21 15:51:37 -07:00 коммит произвёл Saeed Mahameed
Родитель 974eff2b57
Коммит cac018b8c7
2 изменённых файлов: 53 добавлений и 24 удалений
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41
drivers/net/ethernet/mellanox/mlx5/core/en.h
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@ -884,6 +884,47 @@ static inline bool mlx5e_tunnel_inner_ft_supported(struct mlx5_core_dev *mdev)
MLX5_CAP_FLOWTABLE_NIC_RX(mdev, ft_field_support.inner_ip_version));
}
struct mlx5e_swp_spec {
__be16 l3_proto;
u8 l4_proto;
u8 is_tun;
__be16 tun_l3_proto;
u8 tun_l4_proto;
};
static inline void
mlx5e_set_eseg_swp(struct sk_buff *skb, struct mlx5_wqe_eth_seg *eseg,
struct mlx5e_swp_spec *swp_spec)
{
/* SWP offsets are in 2-bytes words */
eseg->swp_outer_l3_offset = skb_network_offset(skb) / 2;
if (swp_spec->l3_proto == htons(ETH_P_IPV6))
eseg->swp_flags |= MLX5_ETH_WQE_SWP_OUTER_L3_IPV6;
if (swp_spec->l4_proto) {
eseg->swp_outer_l4_offset = skb_transport_offset(skb) / 2;
if (swp_spec->l4_proto == IPPROTO_UDP)
eseg->swp_flags |= MLX5_ETH_WQE_SWP_OUTER_L4_UDP;
}
if (swp_spec->is_tun) {
eseg->swp_inner_l3_offset = skb_inner_network_offset(skb) / 2;
if (swp_spec->tun_l3_proto == htons(ETH_P_IPV6))
eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L3_IPV6;
} else { /* typically for ipsec when xfrm mode != XFRM_MODE_TUNNEL */
eseg->swp_inner_l3_offset = skb_network_offset(skb) / 2;
if (swp_spec->l3_proto == htons(ETH_P_IPV6))
eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L3_IPV6;
}
switch (swp_spec->tun_l4_proto) {
case IPPROTO_UDP:
eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L4_UDP;
/* fall through */
case IPPROTO_TCP:
eseg->swp_inner_l4_offset = skb_inner_transport_offset(skb) / 2;
break;
}
}
static inline void mlx5e_sq_fetch_wqe(struct mlx5e_txqsq *sq,
struct mlx5e_tx_wqe **wqe,
u16 *pi)

36
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c
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@ -136,7 +136,7 @@ static void mlx5e_ipsec_set_swp(struct sk_buff *skb,
struct mlx5_wqe_eth_seg *eseg, u8 mode,
struct xfrm_offload *xo)
{
u8 proto;
struct mlx5e_swp_spec swp_spec = {};
/* Tunnel Mode:
* SWP: OutL3 InL3 InL4
@ -146,35 +146,23 @@ static void mlx5e_ipsec_set_swp(struct sk_buff *skb,
* SWP: OutL3 InL4
* InL3
* Pkt: MAC IP ESP L4
*
* Offsets are in 2-byte words, counting from start of frame
*/
eseg->swp_outer_l3_offset = skb_network_offset(skb) / 2;
if (skb->protocol == htons(ETH_P_IPV6))
eseg->swp_flags |= MLX5_ETH_WQE_SWP_OUTER_L3_IPV6;
if (mode == XFRM_MODE_TUNNEL) {
eseg->swp_inner_l3_offset = skb_inner_network_offset(skb) / 2;
swp_spec.l3_proto = skb->protocol;
swp_spec.is_tun = mode == XFRM_MODE_TUNNEL;
if (swp_spec.is_tun) {
if (xo->proto == IPPROTO_IPV6) {
eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L3_IPV6;
proto = inner_ipv6_hdr(skb)->nexthdr;
swp_spec.tun_l3_proto = htons(ETH_P_IPV6);
swp_spec.tun_l4_proto = inner_ipv6_hdr(skb)->nexthdr;
} else {
proto = inner_ip_hdr(skb)->protocol;
swp_spec.tun_l3_proto = htons(ETH_P_IP);
swp_spec.tun_l4_proto = inner_ip_hdr(skb)->protocol;
}
} else {
eseg->swp_inner_l3_offset = skb_network_offset(skb) / 2;
if (skb->protocol == htons(ETH_P_IPV6))
eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L3_IPV6;
proto = xo->proto;
}
switch (proto) {
case IPPROTO_UDP:
eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L4_UDP;
/* Fall through */
case IPPROTO_TCP:
eseg->swp_inner_l4_offset = skb_inner_transport_offset(skb) / 2;
break;
swp_spec.tun_l3_proto = skb->protocol;
swp_spec.tun_l4_proto = xo->proto;
}
mlx5e_set_eseg_swp(skb, eseg, &swp_spec);
}
void mlx5e_ipsec_set_iv_esn(struct sk_buff *skb, struct xfrm_state *x,