net: hns3: add support for traffic class tuple support for flow director by ethtool

The hardware supports to parse and match the traffic class field
of IPv6 packet for flow director, uses the same tuple as ip tos.
So removes the limitation of configure 'tclass' by driver.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c

@@ -5665,8 +5665,7 @@ static int hclge_fd_check_tcpip6_tuple(struct ethtool_tcpip6_spec *spec,
 	if (!spec || !unused_tuple)
 		return -EINVAL;
 
-	*unused_tuple |= BIT(INNER_SRC_MAC) | BIT(INNER_DST_MAC) |
-		BIT(INNER_IP_TOS);
+	*unused_tuple |= BIT(INNER_SRC_MAC) | BIT(INNER_DST_MAC);
 
 	/* check whether src/dst ip address used */
 	if (ipv6_addr_any((struct in6_addr *)spec->ip6src))
@@ -5681,8 +5680,8 @@ static int hclge_fd_check_tcpip6_tuple(struct ethtool_tcpip6_spec *spec,
 	if (!spec->pdst)
 		*unused_tuple |= BIT(INNER_DST_PORT);
 
-	if (spec->tclass)
-		return -EOPNOTSUPP;
+	if (!spec->tclass)
+		*unused_tuple |= BIT(INNER_IP_TOS);
 
 	return 0;
 }
@@ -5694,7 +5693,7 @@ static int hclge_fd_check_ip6_tuple(struct ethtool_usrip6_spec *spec,
 		return -EINVAL;
 
 	*unused_tuple |= BIT(INNER_SRC_MAC) | BIT(INNER_DST_MAC) |
-		BIT(INNER_IP_TOS) | BIT(INNER_SRC_PORT) | BIT(INNER_DST_PORT);
+			BIT(INNER_SRC_PORT) | BIT(INNER_DST_PORT);
 
 	/* check whether src/dst ip address used */
 	if (ipv6_addr_any((struct in6_addr *)spec->ip6src))
@@ -5706,8 +5705,8 @@ static int hclge_fd_check_ip6_tuple(struct ethtool_usrip6_spec *spec,
 	if (!spec->l4_proto)
 		*unused_tuple |= BIT(INNER_IP_PROTO);
 
-	if (spec->tclass)
-		return -EOPNOTSUPP;
+	if (!spec->tclass)
+		*unused_tuple |= BIT(INNER_IP_TOS);
 
 	if (spec->l4_4_bytes)
 		return -EOPNOTSUPP;
@@ -5993,6 +5992,9 @@ static void hclge_fd_get_tcpip6_tuple(struct hclge_dev *hdev,
 	rule->tuples.ether_proto = ETH_P_IPV6;
 	rule->tuples_mask.ether_proto = 0xFFFF;
 
+	rule->tuples.ip_tos = fs->h_u.tcp_ip6_spec.tclass;
+	rule->tuples_mask.ip_tos = fs->m_u.tcp_ip6_spec.tclass;
+
 	rule->tuples.ip_proto = ip_proto;
 	rule->tuples_mask.ip_proto = 0xFF;
 }
@@ -6014,6 +6016,9 @@ static void hclge_fd_get_ip6_tuple(struct hclge_dev *hdev,
 	rule->tuples.ip_proto = fs->h_u.usr_ip6_spec.l4_proto;
 	rule->tuples_mask.ip_proto = fs->m_u.usr_ip6_spec.l4_proto;
 
+	rule->tuples.ip_tos = fs->h_u.tcp_ip6_spec.tclass;
+	rule->tuples_mask.ip_tos = fs->m_u.tcp_ip6_spec.tclass;
+
 	rule->tuples.ether_proto = ETH_P_IPV6;
 	rule->tuples_mask.ether_proto = 0xFFFF;
 }
@@ -6423,6 +6428,10 @@ static void hclge_fd_get_tcpip6_info(struct hclge_fd_rule *rule,
 		cpu_to_be32_array(spec_mask->ip6dst, rule->tuples_mask.dst_ip,
 				  IPV6_SIZE);
 
+	spec->tclass = rule->tuples.ip_tos;
+	spec_mask->tclass = rule->unused_tuple & BIT(INNER_IP_TOS) ?
+			0 : rule->tuples_mask.ip_tos;
+
 	spec->psrc = cpu_to_be16(rule->tuples.src_port);
 	spec_mask->psrc = rule->unused_tuple & BIT(INNER_SRC_PORT) ?
 			0 : cpu_to_be16(rule->tuples_mask.src_port);
@@ -6450,6 +6459,10 @@ static void hclge_fd_get_ip6_info(struct hclge_fd_rule *rule,
 		cpu_to_be32_array(spec_mask->ip6dst,
 				  rule->tuples_mask.dst_ip, IPV6_SIZE);
 
+	spec->tclass = rule->tuples.ip_tos;
+	spec_mask->tclass = rule->unused_tuple & BIT(INNER_IP_TOS) ?
+			0 : rule->tuples_mask.ip_tos;
+
 	spec->l4_proto = rule->tuples.ip_proto;
 	spec_mask->l4_proto = rule->unused_tuple & BIT(INNER_IP_PROTO) ?
 			0 : rule->tuples_mask.ip_proto;