module axis_loopback #(
  parameter int unsigned DATA_W = 64,
  parameter int unsigned KEEP_W = DATA_W / 8,
  parameter int unsigned ID_W   = 8,
  parameter int unsigned DEST_W = 8,
  parameter int unsigned USER_W = 1
)(
  axis_if.slave  s_axis,
  axis_if.master m_axis
);
  assign m_axis.req    = s_axis.req;
  assign s_axis.resp   = m_axis.resp;
endmodule : axis_loopback