ice: VXLAN and Geneve TC support

Add definition for VXLAN and Geneve dummy packet. Define VXLAN and
Geneve type of fields to match on correct UDP tunnel header.

Parse tunnel specific fields from TC tool like outer MACs, outer IPs,
outer destination port and VNI. Save values and masks in outer header
struct and move header pointer to inner to simplify parsing inner
values.

There are two cases for redirect action:
- from uplink to VF - TC filter is added on tunnel device
- from VF to uplink - TC filter is added on PR, for this case check if
  redirect device is tunnel device

VXLAN example:
- create tunnel device
ip l add $VXLAN_DEV type vxlan id $VXLAN_VNI dstport $VXLAN_PORT \
dev $PF
- add TC filter (in switchdev mode)
tc filter add dev $VXLAN_DEV protocol ip parent ffff: flower \
enc_dst_ip $VF1_IP enc_key_id $VXLAN_VNI action mirred egress \
redirect dev $VF1_PR

Geneve example:
- create tunnel device
ip l add $GENEVE_DEV type geneve id $GENEVE_VNI dstport $GENEVE_PORT \
remote $GENEVE_IP
- add TC filter (in switchdev mode)
tc filter add dev $GENEVE_DEV protocol ip parent ffff: flower \
enc_key_id $GENEVE_VNI dst_ip $GENEVE1_IP action mirred egress \
redirect dev $VF1_PR

Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_main.c

@@ -8270,6 +8270,11 @@ ice_indr_setup_tc_block(struct net_device *netdev, struct Qdisc *sch,
 	struct ice_indr_block_priv *indr_priv;
 	struct flow_block_cb *block_cb;
 
+	if (!ice_is_tunnel_supported(netdev) &&
+	    !(is_vlan_dev(netdev) &&
+	      vlan_dev_real_dev(netdev) == np->vsi->netdev))
+		return -EOPNOTSUPP;
+
 	if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
 		return -EOPNOTSUPP;
 

drivers/net/ethernet/intel/ice/ice_protocol_type.h

@@ -37,10 +37,19 @@ enum ice_protocol_type {
 	ICE_TCP_IL,
 	ICE_UDP_OF,
 	ICE_UDP_ILOS,
+	ICE_VXLAN,
+	ICE_GENEVE,
+	ICE_VXLAN_GPE,
 	ICE_SCTP_IL,
 	ICE_PROTOCOL_LAST
 };
 
+enum ice_sw_tunnel_type {
+	ICE_NON_TUN = 0,
+	ICE_SW_TUN_VXLAN,
+	ICE_SW_TUN_GENEVE,
+};
+
 /* Decoders for ice_prot_id:
  * - F: First
  * - I: Inner
@@ -152,6 +161,12 @@ struct ice_l4_hdr {
 	__be16 check;
 };
 
+struct ice_udp_tnl_hdr {
+	__be16 field;
+	__be16 proto_type;
+	__be32 vni;     /* only use lower 24-bits */
+};
+
 union ice_prot_hdr {
 	struct ice_ether_hdr eth_hdr;
 	struct ice_ethtype_hdr ethertype;
@@ -160,6 +175,7 @@ union ice_prot_hdr {
 	struct ice_ipv6_hdr ipv6_hdr;
 	struct ice_l4_hdr l4_hdr;
 	struct ice_sctp_hdr sctp_hdr;
+	struct ice_udp_tnl_hdr tnl_hdr;
 };
 
 /* This is mapping table entry that maps every word within a given protocol

drivers/net/ethernet/intel/ice/ice_switch.h

@@ -171,6 +171,7 @@ struct ice_adv_rule_flags_info {
 };
 
 struct ice_adv_rule_info {
+	enum ice_sw_tunnel_type tun_type;
 	struct ice_sw_act_ctrl sw_act;
 	u32 priority;
 	u8 rx; /* true means LOOKUP_RX otherwise LOOKUP_TX */

drivers/net/ethernet/intel/ice/ice_tc_lib.h

@@ -23,6 +23,8 @@
 #define ICE_TC_FLWR_FIELD_ENC_DST_MAC		BIT(16)
 #define ICE_TC_FLWR_FIELD_ETH_TYPE_ID		BIT(17)
 
+#define ICE_TC_FLOWER_MASK_32   0xFFFFFFFF
+
 struct ice_indr_block_priv {
 	struct net_device *netdev;
 	struct ice_netdev_priv *np;
@@ -118,6 +120,7 @@ struct ice_tc_flower_fltr {
 	struct ice_vsi *src_vsi;
 	__be32 tenant_id;
 	u32 flags;
+	u8 tunnel_type;
 	struct ice_tc_flower_action	action;
 
 	/* cache ptr which is used wherever needed to communicate netlink
@@ -154,5 +157,6 @@ ice_add_cls_flower(struct net_device *netdev, struct ice_vsi *vsi,
 int
 ice_del_cls_flower(struct ice_vsi *vsi, struct flow_cls_offload *cls_flower);
 void ice_replay_tc_fltrs(struct ice_pf *pf);
+bool ice_is_tunnel_supported(struct net_device *dev);
 
 #endif /* _ICE_TC_LIB_H_ */