net/mlx5: DR, Refactor ICMP STE builder

Reworked ICMP tag builder to better handle ICMP v4/6 fields and avoid unneeded
code duplication and 'if' statements, removed unused macro, changed bitfield
of len 8 to u8.

Signed-off-by: Alex Vesker <valex@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c

@@ -662,74 +662,55 @@ dr_ste_v0_build_tnl_mpls_init(struct mlx5dr_ste_build *sb,
 	sb->ste_build_tag_func = &dr_ste_v0_build_tnl_mpls_tag;
 }
 
-#define ICMP_TYPE_OFFSET_FIRST_DW		24
-#define ICMP_CODE_OFFSET_FIRST_DW		16
-#define ICMP_HEADER_DATA_OFFSET_SECOND_DW	0
+#define ICMP_TYPE_OFFSET_FIRST_DW	24
+#define ICMP_CODE_OFFSET_FIRST_DW	16
 
 static int
 dr_ste_v0_build_icmp_tag(struct mlx5dr_match_param *value,
 			 struct mlx5dr_ste_build *sb,
 			 u8 *tag)
 {
 	struct mlx5dr_match_misc3 *misc_3 = &value->misc3;
-	u32 icmp_header_data;
+	u32 *icmp_header_data;
 	int dw0_location;
 	int dw1_location;
-	u32 icmp_type;
-	u32 icmp_code;
+	u8 *icmp_type;
+	u8 *icmp_code;
 	bool is_ipv4;
 
 	is_ipv4 = DR_MASK_IS_ICMPV4_SET(misc_3);
 	if (is_ipv4) {
-		icmp_header_data	= misc_3->icmpv4_header_data;
-		icmp_type		= misc_3->icmpv4_type;
-		icmp_code		= misc_3->icmpv4_code;
+		icmp_header_data	= &misc_3->icmpv4_header_data;
+		icmp_type		= &misc_3->icmpv4_type;
+		icmp_code		= &misc_3->icmpv4_code;
 		dw0_location		= sb->caps->flex_parser_id_icmp_dw0;
 		dw1_location		= sb->caps->flex_parser_id_icmp_dw1;
 	} else {
-		icmp_header_data	= misc_3->icmpv6_header_data;
-		icmp_type		= misc_3->icmpv6_type;
-		icmp_code		= misc_3->icmpv6_code;
+		icmp_header_data	= &misc_3->icmpv6_header_data;
+		icmp_type		= &misc_3->icmpv6_type;
+		icmp_code		= &misc_3->icmpv6_code;
 		dw0_location		= sb->caps->flex_parser_id_icmpv6_dw0;
 		dw1_location		= sb->caps->flex_parser_id_icmpv6_dw1;
 	}
 
 	switch (dw0_location) {
 	case 4:
-		if (icmp_type) {
-			MLX5_SET(ste_flex_parser_1, tag, flex_parser_4,
-				 (icmp_type << ICMP_TYPE_OFFSET_FIRST_DW));
-			if (is_ipv4)
-				misc_3->icmpv4_type = 0;
-			else
-				misc_3->icmpv6_type = 0;
-		}
+		MLX5_SET(ste_flex_parser_1, tag, flex_parser_4,
+			 (*icmp_type << ICMP_TYPE_OFFSET_FIRST_DW) |
+			 (*icmp_code << ICMP_TYPE_OFFSET_FIRST_DW));
 
-		if (icmp_code) {
-			u32 cur_val = MLX5_GET(ste_flex_parser_1, tag,
-					       flex_parser_4);
-			MLX5_SET(ste_flex_parser_1, tag, flex_parser_4,
-				 cur_val | (icmp_code << ICMP_CODE_OFFSET_FIRST_DW));
-			if (is_ipv4)
-				misc_3->icmpv4_code = 0;
-			else
-				misc_3->icmpv6_code = 0;
-		}
+		*icmp_type = 0;
+		*icmp_code = 0;
 		break;
 	default:
 		return -EINVAL;
 	}
 
 	switch (dw1_location) {
 	case 5:
-		if (icmp_header_data) {
-			MLX5_SET(ste_flex_parser_1, tag, flex_parser_5,
-				 (icmp_header_data << ICMP_HEADER_DATA_OFFSET_SECOND_DW));
-			if (is_ipv4)
-				misc_3->icmpv4_header_data = 0;
-			else
-				misc_3->icmpv6_header_data = 0;
-		}
+		MLX5_SET(ste_flex_parser_1, tag, flex_parser_5,
+			 *icmp_header_data);
+		*icmp_header_data = 0;
 		break;
 	default:
 		return -EINVAL;

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h

@@ -596,10 +596,10 @@ struct mlx5dr_match_misc3 {
 	u32 outer_vxlan_gpe_next_protocol:8;
 	u32 icmpv4_header_data;
 	u32 icmpv6_header_data;
-	u32 icmpv6_code:8;
-	u32 icmpv6_type:8;
-	u32 icmpv4_code:8;
-	u32 icmpv4_type:8;
+	u8 icmpv6_code;
+	u8 icmpv6_type;
+	u8 icmpv4_code;
+	u8 icmpv4_type;
 	u8 reserved_auto3[0x1c];
 };