Struct DmaDeviceConfig

#[repr(C)]
pub struct DmaDeviceConfig {
    pub deviceId: s8,
    pub allowedAlignments: s8,
    pub burstSize: s16,
    pub transferSize: s16,
    pub burstStride: s16,
    pub transferStride: s16,
}

Device configuration structure, part of DmaConfig.

Note: - if (and only if) src/dst is a device, then src/dst won’t be auto-incremented.

• the kernel uses DMAMOV instead of DMAADNH, when having to decrement (possibly working around an erratum); this forces all loops to be unrolled – you need to keep that in mind when using negative increments, as the kernel uses a limit of 100 DMA instruction bytes per channel.

Fields

deviceId: s8

< DMA device ID.

allowedAlignments: s8

< Mask of allowed access alignments (8, 4, 2, 1).

burstSize: s16

< Number of bytes transferred in a burst loop. Can be 0 (in which case the max allowed alignment is used as unit).

transferSize: s16

< Number of bytes transferred in a “transfer” loop (made of burst loops).

burstStride: s16

< Burst loop stride, can be <= 0.

transferStride: s16

< “Transfer” loop stride, can be <= 0.

Trait Implementations

impl Clone for DmaDeviceConfig

fn clone(&self) -> DmaDeviceConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DmaDeviceConfig

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

Formats the value using the given formatter.

impl Default for DmaDeviceConfig

fn default() -> DmaDeviceConfig

Returns the “default value” for a type.

impl Copy for DmaDeviceConfig