Trait devices::usb::backend::device::BackendDevice

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pub trait BackendDevice: Sync + Send {
Show 15 methods    // Required methods
    fn submit_backend_transfer(
        &mut self,
        transfer: BackendTransferType
    ) -> Result<BackendTransferHandle>;
    fn detach_event_handler(&self, event_loop: &Arc<EventLoop>) -> Result<()>;
    fn request_transfer_buffer(&mut self, size: usize) -> TransferBuffer;
    fn build_bulk_transfer(
        &mut self,
        ep_addr: u8,
        transfer_buffer: TransferBuffer,
        stream_id: Option<u16>
    ) -> Result<BackendTransferType>;
    fn build_interrupt_transfer(
        &mut self,
        ep_addr: u8,
        transfer_buffer: TransferBuffer
    ) -> Result<BackendTransferType>;
    fn get_control_transfer_state(
        &mut self
    ) -> Arc<RwLock<ControlTransferState>>;
    fn get_device_state(&mut self) -> Arc<RwLock<DeviceState>>;
    fn get_active_config_descriptor(&mut self) -> Result<ConfigDescriptorTree>;
    fn get_config_descriptor(
        &mut self,
        config: u8
    ) -> Result<ConfigDescriptorTree>;
    fn get_config_descriptor_by_index(
        &mut self,
        config_index: u8
    ) -> Result<ConfigDescriptorTree>;
    fn get_device_descriptor_tree(&mut self) -> Result<DeviceDescriptorTree>;
    fn get_active_configuration(&mut self) -> Result<u8>;
    fn set_active_configuration(&mut self, config: u8) -> Result<()>;
    fn clear_feature(
        &mut self,
        value: u16,
        index: u16
    ) -> Result<TransferStatus>;
    fn create_endpoints(
        &mut self,
        config_descriptor: &ConfigDescriptorTree
    ) -> Result<()>;
}

Expand description

Backend device trait implementation is the interface of a generic backend device to interact with concrete implementations

Required Methods§

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fn submit_backend_transfer( &mut self, transfer: BackendTransferType ) -> Result<BackendTransferHandle>

Submits a transfer to the specific backend implementation.

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fn detach_event_handler(&self, event_loop: &Arc<EventLoop>) -> Result<()>

This is called by a generic backend provider when a USB detach message is received from the vm control socket. It detaches the backend device from the backend provider event loop.

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fn request_transfer_buffer(&mut self, size: usize) -> TransferBuffer

Gets a buffer used for data transfer between the host and this device. The buffer returned by this function must be consumed by submit_backend_transfer().

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