Merge branch 'implement-udp-tunnel-port-for-txgbe'

Jiawen Wu says:

====================
Implement udp tunnel port for txgbe

v3: https://lore.kernel.org/20250417080328.426554-1-jiawenwu@trustnetic.com
v2: https://lore.kernel.org/20250414091022.383328-1-jiawenwu@trustnetic.com
v1: https://lore.kernel.org/20250410074456.321847-1-jiawenwu@trustnetic.com
====================

Link: https://patch.msgid.link/20250421022956.508018-1-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: kuba-moo

drivers/net/ethernet/wangxun/libwx/wx_lib.c

@@ -3000,6 +3000,33 @@ netdev_features_t wx_fix_features(struct net_device *netdev,
 }
 EXPORT_SYMBOL(wx_fix_features);
 
+#define WX_MAX_TUNNEL_HDR_LEN	80
+netdev_features_t wx_features_check(struct sk_buff *skb,
+				    struct net_device *netdev,
+				    netdev_features_t features)
+{
+	struct wx *wx = netdev_priv(netdev);
+
+	if (!skb->encapsulation)
+		return features;
+
+	if (wx->mac.type == wx_mac_em)
+		return features & ~NETIF_F_CSUM_MASK;
+
+	if (unlikely(skb_inner_mac_header(skb) - skb_transport_header(skb) >
+		     WX_MAX_TUNNEL_HDR_LEN))
+		return features & ~NETIF_F_CSUM_MASK;
+
+	if (skb->inner_protocol_type == ENCAP_TYPE_ETHER &&
+	    skb->inner_protocol != htons(ETH_P_IP) &&
+	    skb->inner_protocol != htons(ETH_P_IPV6) &&
+	    skb->inner_protocol != htons(ETH_P_TEB))
+		return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
+
+	return features;
+}
+EXPORT_SYMBOL(wx_features_check);
+
 void wx_set_ring(struct wx *wx, u32 new_tx_count,
 		 u32 new_rx_count, struct wx_ring *temp_ring)
 {

drivers/net/ethernet/wangxun/libwx/wx_lib.h

@@ -33,6 +33,9 @@ void wx_get_stats64(struct net_device *netdev,
 int wx_set_features(struct net_device *netdev, netdev_features_t features);
 netdev_features_t wx_fix_features(struct net_device *netdev,
 				  netdev_features_t features);
+netdev_features_t wx_features_check(struct sk_buff *skb,
+				    struct net_device *netdev,
+				    netdev_features_t features);
 void wx_set_ring(struct wx *wx, u32 new_tx_count,
 		 u32 new_rx_count, struct wx_ring *temp_ring);
 

drivers/net/ethernet/wangxun/ngbe/ngbe_main.c

@@ -587,6 +587,7 @@ static const struct net_device_ops ngbe_netdev_ops = {
 	.ndo_set_rx_mode        = wx_set_rx_mode,
 	.ndo_set_features       = wx_set_features,
 	.ndo_fix_features       = wx_fix_features,
+	.ndo_features_check     = wx_features_check,
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_set_mac_address    = wx_set_mac,
 	.ndo_get_stats64        = wx_get_stats64,

drivers/net/ethernet/wangxun/txgbe/txgbe_main.c

@@ -8,6 +8,7 @@
 #include <linux/string.h>
 #include <linux/etherdevice.h>
 #include <linux/phylink.h>
+#include <net/udp_tunnel.h>
 #include <net/ip.h>
 #include <linux/if_vlan.h>
 
@@ -537,6 +538,39 @@ void txgbe_do_reset(struct net_device *netdev)
 		txgbe_reset(wx);
 }
 
+static int txgbe_udp_tunnel_sync(struct net_device *dev, unsigned int table)
+{
+	struct wx *wx = netdev_priv(dev);
+	struct udp_tunnel_info ti;
+
+	udp_tunnel_nic_get_port(dev, table, 0, &ti);
+	switch (ti.type) {
+	case UDP_TUNNEL_TYPE_VXLAN:
+		wr32(wx, TXGBE_CFG_VXLAN, ntohs(ti.port));
+		break;
+	case UDP_TUNNEL_TYPE_VXLAN_GPE:
+		wr32(wx, TXGBE_CFG_VXLAN_GPE, ntohs(ti.port));
+		break;
+	case UDP_TUNNEL_TYPE_GENEVE:
+		wr32(wx, TXGBE_CFG_GENEVE, ntohs(ti.port));
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static const struct udp_tunnel_nic_info txgbe_udp_tunnels = {
+	.sync_table	= txgbe_udp_tunnel_sync,
+	.flags		= UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
+	.tables		= {
+		{ .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
+		{ .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN_GPE, },
+		{ .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_GENEVE, },
+	},
+};
+
 static const struct net_device_ops txgbe_netdev_ops = {
 	.ndo_open               = txgbe_open,
 	.ndo_stop               = txgbe_close,
@@ -545,6 +579,7 @@ static const struct net_device_ops txgbe_netdev_ops = {
 	.ndo_set_rx_mode        = wx_set_rx_mode,
 	.ndo_set_features       = wx_set_features,
 	.ndo_fix_features       = wx_fix_features,
+	.ndo_features_check     = wx_features_check,
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_set_mac_address    = wx_set_mac,
 	.ndo_get_stats64        = wx_get_stats64,
@@ -632,6 +667,7 @@ static int txgbe_probe(struct pci_dev *pdev,
 	wx->driver_name = txgbe_driver_name;
 	txgbe_set_ethtool_ops(netdev);
 	netdev->netdev_ops = &txgbe_netdev_ops;
+	netdev->udp_tunnel_nic_info = &txgbe_udp_tunnels;
 
 	/* setup the private structure */
 	err = txgbe_sw_init(wx);
@@ -677,6 +713,7 @@ static int txgbe_probe(struct pci_dev *pdev,
 	netdev->features |= NETIF_F_HIGHDMA;
 	netdev->hw_features |= NETIF_F_GRO;
 	netdev->features |= NETIF_F_GRO;
+	netdev->features |= NETIF_F_RX_UDP_TUNNEL_PORT;
 
 	netdev->priv_flags |= IFF_UNICAST_FLT;
 	netdev->priv_flags |= IFF_SUPP_NOFCS;

drivers/net/ethernet/wangxun/txgbe/txgbe_type.h

@@ -88,6 +88,9 @@
 /* Port cfg registers */
 #define TXGBE_CFG_PORT_ST                       0x14404
 #define TXGBE_CFG_PORT_ST_LINK_UP               BIT(0)
+#define TXGBE_CFG_VXLAN                         0x14410
+#define TXGBE_CFG_VXLAN_GPE                     0x14414
+#define TXGBE_CFG_GENEVE                        0x14418
 
 /* I2C registers */
 #define TXGBE_I2C_BASE                          0x14900