Struct devices::virtio::vhost::user::device::gpu::GpuBackend

struct GpuBackend {
    ex: Executor,
    gpu: Rc<RefCell<Gpu>>,
    resource_bridges: Arc<Mutex<Vec<Tube>>>,
    acked_protocol_features: u64,
    state: Option<Rc<RefCell<Frontend>>>,
    fence_state: Arc<Mutex<FenceState>>,
    queue_workers: [Option<WorkerState<Arc<Mutex<Queue>>, ()>>; 2],
    platform_workers: Rc<RefCell<Vec<TaskHandle<()>>>>,
    shmem_mapper: Arc<Mutex<Option<Box<dyn SharedMemoryMapper>>>>,
}

Fields

ex: Executor

gpu: Rc<RefCell<Gpu>>

resource_bridges: Arc<Mutex<Vec<Tube>>>

acked_protocol_features: u64

state: Option<Rc<RefCell<Frontend>>>

fence_state: Arc<Mutex<FenceState>>

queue_workers: [Option<WorkerState<Arc<Mutex<Queue>>, ()>>; 2]

platform_workers: Rc<RefCell<Vec<TaskHandle<()>>>>

shmem_mapper: Arc<Mutex<Option<Box<dyn SharedMemoryMapper>>>>

Implementations

impl GpuBackend

pub fn start_platform_workers(&mut self, _interrupt: Interrupt) -> Result<()>

Trait Implementations

impl Drop for GpuBackend

fn drop(&mut self)

Executes the destructor for this type.

impl VhostUserDevice for GpuBackend

fn max_queue_num(&self) -> usize

The maximum number of queues that this backend can manage.

fn features(&self) -> u64

The set of feature bits that this backend supports.

fn ack_features(&mut self, value: u64) -> Result<()>

Acknowledges that this set of features should be enabled.

fn acked_features(&self) -> u64

Returns the set of enabled features.

fn protocol_features(&self) -> VhostUserProtocolFeatures

The set of protocol feature bits that this backend supports.

fn ack_protocol_features(&mut self, features: u64) -> Result<()>

Acknowledges that this set of protocol features should be enabled.

fn acked_protocol_features(&self) -> u64

Returns the set of enabled protocol features.

fn read_config(&self, offset: u64, dst: &mut [u8])

Reads this device configuration space at offset.

fn write_config(&self, offset: u64, data: &[u8])

writes data to this device’s configuration space at offset.

fn start_queue( &mut self, idx: usize, queue: Queue, mem: GuestMemory, doorbell: Interrupt ) -> Result<()>

Indicates that the backend should start processing requests for virtio queue number idx. This method must not block the current thread so device backends should either spawn an async task or another thread to handle messages from the Queue.

fn stop_queue(&mut self, idx: usize) -> Result<Queue>

Indicates that the backend should stop processing requests for virtio queue number idx. This method should return the queue passed to start_queue for the corresponding idx. This method will only be called for queues that were previously started by start_queue.

fn stop_non_queue_workers(&mut self) -> Result<()>

Used to stop non queue workers that VhostUserDevice::stop_queue can’t stop. May or may not also stop all queue workers.

fn reset(&mut self)

Resets the vhost-user backend.

fn get_shared_memory_region(&self) -> Option<SharedMemoryRegion>

Returns the device’s shared memory region if present.

fn set_backend_req_connection(&mut self, conn: Arc<VhostBackendReqConnection>)

Accepts VhostBackendReqConnection to conduct Vhost backend to frontend message handling.

fn snapshot(&self) -> Result<Vec<u8>>

Snapshot device and return serialized bytes.

fn restore(&mut self, data: Vec<u8>) -> Result<()>