net/mlx5e: Advertise IPsec packet offload support

Add needed capabilities check to determine if device supports IPsec
packet offload mode.
Reviewed-by: Raed Salem <raeds@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h

@@ -88,6 +88,7 @@ struct mlx5_accel_esp_xfrm_attrs {
 enum mlx5_ipsec_cap {
 	MLX5_IPSEC_CAP_CRYPTO		= 1 << 0,
 	MLX5_IPSEC_CAP_ESN		= 1 << 1,
+	MLX5_IPSEC_CAP_PACKET_OFFLOAD	= 1 << 2,
 };
 
 struct mlx5e_priv;

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c

@@ -31,6 +31,12 @@ u32 mlx5_ipsec_device_caps(struct mlx5_core_dev *mdev)
 	    MLX5_CAP_ETH(mdev, insert_trailer) && MLX5_CAP_ETH(mdev, swp))
 		caps |= MLX5_IPSEC_CAP_CRYPTO;
 
+	if (MLX5_CAP_IPSEC(mdev, ipsec_full_offload) &&
+	    MLX5_CAP_FLOWTABLE_NIC_TX(mdev, reformat_add_esp_trasport) &&
+	    MLX5_CAP_FLOWTABLE_NIC_RX(mdev, reformat_del_esp_trasport) &&
+	    MLX5_CAP_FLOWTABLE_NIC_RX(mdev, decap))
+		caps |= MLX5_IPSEC_CAP_PACKET_OFFLOAD;
+
 	if (!caps)
 		return 0;