Function FXmacBdRingCreate 

pub fn FXmacBdRingCreate(
    ring_ptr: &mut FXmacBdRing,
    phys_addr: u64,
    virt_addr: u64,
    alignment: u64,
    bd_count: u32,
) -> u32

Create the RxBD ring 创建收包的环形缓冲区