Struct GpdmaStreamConfig 

#[repr(C)]
pub struct GpdmaStreamConfig {

    pub channel: u16,
    pub stream: u16,
    pub controller: u16,
    pub transfer_type: u16,
    pub source: usize,
    pub dest: usize,
    pub transfer_len: usize,
    pub circular_source: bool,
    pub circular_dest: bool,
    pub interrupts: u8,
    pub is_triggered: bool,
    pub trigger: u8,
    pub priority: u8,
    pub transfer_mode: u8,
    pub src_beat_len: u8,
    pub dest_beat_len: u8,
}

DMA static configuration information

Usage

This structure is delivered by the kernel into svc_exchange when calling successfully crate::syscall::dma_get_stream_info().

The structure content correspond to the static build-time information as defined in the device-tree and do not require any DTS manipulation in user-space.

Example

let dmacfg: dma_stream_cfg;
match get_dma_stream_info(dmah) {
   Status::Ok => (svc_exchange::copy_from(&dma_stream_cfg, mem::sizeof(dma_stream_cfg)))
}

Fields

channel: u16

stream: u16

controller: u16

transfer_type: u16

source: usize

dest: usize

transfer_len: usize

circular_source: bool

circular_dest: bool

interrupts: u8

is_triggered: bool

trigger: u8

priority: u8

transfer_mode: u8

src_beat_len: u8

dest_beat_len: u8

Trait Implementations

impl Clone for GpdmaStreamConfig

fn clone(&self) -> GpdmaStreamConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GpdmaStreamConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl SentryExchangeable for GpdmaStreamConfig

SentryExchangeable trait implementation for dma::GpdmaStreamConfig. dma::GpdmaStreamConfig is a typical structure which is returned by the kernel to the userspace in order to delivers various DMA stream-related information to a given task that is using the corresponding DMA handle.

In test mode only, this structure can be written back to the Exchange Area. In production mode, the application can’t write such a content to the exchange as the kernel as strictly no use of it.

fn from_kernel(&mut self) -> Result<Status, Status>

set the current object using the data delivered by the kernel in the exchange zone

fn to_kernel(&self) -> Result<Status, Status>

Copy the current object to the kernel exchagne zone

impl Copy for GpdmaStreamConfig