usip 6104 drivers/net/ethernet/mellanox/mlxsw/reg.h u16 uvr_id, u16 underlay_rif, u32 usip, u32 gre_key) usip 6110 drivers/net/ethernet/mellanox/mlxsw/reg.h mlxsw_reg_ritr_loopback_ipip_usip4_set(payload, usip);