Struct EventRing 

pub struct EventRing { /* private fields */ }

Event Ring: the host controller enqueues event TRBs here

Implementations

impl EventRing

pub fn new(segment_phys: u64, capacity: usize) -> Self

Create a new event ring

pub unsafe fn dequeue(&mut self) -> Option<Trb>

Dequeue the next event TRB if one is available.

Returns Some(trb) if the cycle bit of the TRB at the dequeue pointer matches our expected cycle state, or None if no event is pending.

Safety

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

pub fn erdp_value(&self) -> u64

Get the current dequeue pointer for writing to ERDP