Struct TransferRing 

pub struct TransferRing { /* private fields */ }

Transfer Ring: per-endpoint ring for bulk/interrupt/control data transfers

Implementations

impl TransferRing

pub fn new(segment_phys: u64) -> Self

Create a new transfer ring

pub unsafe fn enqueue(&mut self, trb: Trb) -> u64

Enqueue a TRB onto the transfer ring.

Safety

The caller must ensure the ring segment is valid DMA memory.

pub unsafe fn enqueue_control( &mut self, request_type: u8, request: u8, value: u16, index: u16, data_phys: u64, data_len: u16, ) -> u64

Enqueue a control transfer (Setup + optional Data + Status).

Returns the physical address of the Status Stage TRB.

Safety

The caller must ensure the ring segment is valid DMA memory and data_phys (if non-zero) points to a valid buffer of data_len bytes.

pub fn base_phys(&self) -> u64

Get physical base address of the ring