Struct CommandRing 

pub struct CommandRing { /* private fields */ }

Command Ring: the host controller dequeues command TRBs from here

Implementations

impl CommandRing

pub fn new(segment_phys: u64) -> Self

Create a new command ring

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

Enqueue a command TRB onto the ring.

Returns the physical address of the enqueued TRB.

Safety

The caller must ensure segment_phys points to valid, mapped, DMA-accessible memory of at least RING_SEGMENT_SIZE bytes.

pub fn crcr_value(&self) -> u64

Get the physical base address and current cycle bit for CRCR