net/mlx5e: Set IPsec WAs only in IP's non checksum partial case.

The IP's checksum partial still requires L4 csum flag on Ethernet WQE.
Make the IPsec WAs only for the IP's non checksum partial case
(for example icmd packet)

Fixes: 5be0190 ("net/mlx5e: IPsec: Add Connect-X IPsec Tx data path offload")
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Reviewed-by: Alaa Hleihel <alaa@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Author: Huy Nguyen

drivers/net/ethernet/mellanox/mlx5/core/en_tx.c

@@ -144,7 +144,9 @@ static inline void mlx5e_insert_vlan(void *start, struct sk_buff *skb, u16 ihs)
 	memcpy(&vhdr->h_vlan_encapsulated_proto, skb->data + cpy1_sz, cpy2_sz);
 }
 
-/* RM 2311217: no L4 inner checksum for IPsec tunnel type packet */
+/* If packet is not IP's CHECKSUM_PARTIAL (e.g. icmd packet),
+ * need to set L3 checksum flag for IPsec
+ */
 static void
 ipsec_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb,
 			    struct mlx5_wqe_eth_seg *eseg)
@@ -154,19 +156,13 @@ ipsec_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb,
 		eseg->cs_flags |= MLX5_ETH_WQE_L3_INNER_CSUM;
 		sq->stats->csum_partial_inner++;
 	} else {
-		eseg->cs_flags |= MLX5_ETH_WQE_L4_CSUM;
 		sq->stats->csum_partial++;
 	}
 }
 
 static inline void
 mlx5e_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb, struct mlx5_wqe_eth_seg *eseg)
 {
-	if (unlikely(eseg->flow_table_metadata & cpu_to_be32(MLX5_ETH_WQE_FT_META_IPSEC))) {
-		ipsec_txwqe_build_eseg_csum(sq, skb, eseg);
-		return;
-	}
-
 	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
 		eseg->cs_flags = MLX5_ETH_WQE_L3_CSUM;
 		if (skb->encapsulation) {
@@ -177,6 +173,9 @@ mlx5e_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb, struct
 			eseg->cs_flags |= MLX5_ETH_WQE_L4_CSUM;
 			sq->stats->csum_partial++;
 		}
+	} else if (unlikely(eseg->flow_table_metadata & cpu_to_be32(MLX5_ETH_WQE_FT_META_IPSEC))) {
+		ipsec_txwqe_build_eseg_csum(sq, skb, eseg);
+
 	} else
 		sq->stats->csum_none++;
 }