mlxsw: spectrum_ipip: Remove overlay protocol from can_offload() callback

The overlay protocol (i.e., IPv4/IPv6) that is being encapsulated has
no impact on whether a certain IP tunnel can be offloaded or not. Only
the underlay protocol matters.

Therefore, remove the unused overlay protocol parameter from the
callback.

This will later allow us to consolidate code paths between IPv4 and IPv6
code.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c

@@ -233,8 +233,7 @@ static bool mlxsw_sp_ipip_tunnel_complete(enum mlxsw_sp_l3proto proto,
 }
 
 static bool mlxsw_sp_ipip_can_offload_gre4(const struct mlxsw_sp *mlxsw_sp,
-					   const struct net_device *ol_dev,
-					   enum mlxsw_sp_l3proto ol_proto)
+					   const struct net_device *ol_dev)
 {
 	struct ip_tunnel *tunnel = netdev_priv(ol_dev);
 	__be16 okflags = TUNNEL_KEY; /* We can't offload any other features. */

drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h

@@ -43,8 +43,7 @@ struct mlxsw_sp_ipip_ops {
 			      struct mlxsw_sp_ipip_entry *ipip_entry);
 
 	bool (*can_offload)(const struct mlxsw_sp *mlxsw_sp,
-			    const struct net_device *ol_dev,
-			    enum mlxsw_sp_l3proto ol_proto);
+			    const struct net_device *ol_dev);
 
 	/* Return a configuration for creating an overlay loopback RIF. */
 	struct mlxsw_sp_rif_ipip_lb_config

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -1453,11 +1453,7 @@ static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp,
 	const struct mlxsw_sp_ipip_ops *ops
 		= mlxsw_sp->router->ipip_ops_arr[ipipt];
 
-	/* For deciding whether decap should be offloaded, we don't care about
-	 * overlay protocol, so ask whether either one is supported.
-	 */
-	return ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV4) ||
-	       ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV6);
+	return ops->can_offload(mlxsw_sp, ol_dev);
 }
 
 static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp,
@@ -3925,8 +3921,7 @@ static int mlxsw_sp_nexthop4_type_init(struct mlxsw_sp *mlxsw_sp,
 	ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
 	if (ipip_entry) {
 		ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
-		if (ipip_ops->can_offload(mlxsw_sp, dev,
-					  MLXSW_SP_L3_PROTO_IPV4)) {
+		if (ipip_ops->can_offload(mlxsw_sp, dev)) {
 			nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
 			mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
 			return 0;
@@ -5371,8 +5366,7 @@ static int mlxsw_sp_nexthop6_type_init(struct mlxsw_sp *mlxsw_sp,
 	ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
 	if (ipip_entry) {
 		ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
-		if (ipip_ops->can_offload(mlxsw_sp, dev,
-					  MLXSW_SP_L3_PROTO_IPV6)) {
+		if (ipip_ops->can_offload(mlxsw_sp, dev)) {
 			nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
 			mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
 			return 0;