net: hns3: Add support for rule add/delete for flow director

This patch adds support for add and delete rule by ethtool commands.
HNS3 driver supports several flow types, include ETHER_FLOW,
IP_USER_FLOW, TCP_V4_FLOW, UDP_V4_FLOW, SCTP_V4_FLOW, IPV6_USER_FLOW,
TCP_V6_FLOW, UDP_V6_FLOW and SCTP_V6_FLOW.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hnae3.h

@@ -416,6 +416,10 @@ struct hnae3_ae_ops {
 	void (*get_link_mode)(struct hnae3_handle *handle,
 			      unsigned long *supported,
 			      unsigned long *advertising);
+	int (*add_fd_entry)(struct hnae3_handle *handle,
+			    struct ethtool_rxnfc *cmd);
+	int (*del_fd_entry)(struct hnae3_handle *handle,
+			    struct ethtool_rxnfc *cmd);
 };
 
 struct hnae3_dcb_ops {

drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c

@@ -795,12 +795,22 @@ static int hns3_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
 {
 	struct hnae3_handle *h = hns3_get_handle(netdev);
 
-	if (!h->ae_algo || !h->ae_algo->ops || !h->ae_algo->ops->set_rss_tuple)
+	if (!h->ae_algo || !h->ae_algo->ops)
 		return -EOPNOTSUPP;
 
 	switch (cmd->cmd) {
 	case ETHTOOL_SRXFH:
+		if (h->ae_algo->ops->set_rss_tuple)
 			return h->ae_algo->ops->set_rss_tuple(h, cmd);
+		return -EOPNOTSUPP;
+	case ETHTOOL_SRXCLSRLINS:
+		if (h->ae_algo->ops->add_fd_entry)
+			return h->ae_algo->ops->add_fd_entry(h, cmd);
+		return -EOPNOTSUPP;
+	case ETHTOOL_SRXCLSRLDEL:
+		if (h->ae_algo->ops->del_fd_entry)
+			return h->ae_algo->ops->del_fd_entry(h, cmd);
+		return -EOPNOTSUPP;
 	default:
 		return -EOPNOTSUPP;
 	}

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

@@ -678,6 +678,8 @@ struct hclge_dev {
 	unsigned long vlan_table[VLAN_N_VID][BITS_TO_LONGS(HCLGE_VPORT_NUM)];
 
 	struct hclge_fd_cfg fd_cfg;
+	struct hlist_head fd_rule_list;
+	u16 hclge_fd_rule_num;
 };
 
 /* VPort level vlan tag configuration for TX direction */