Struct KernelDmaOp 

pub struct KernelDmaOp;

Trait Implementations

impl DmaOp for KernelDmaOp

fn page_size(&self) -> usize

unsafe fn map_single( &self, dma_mask: u64, addr: NonNull<u8>, size: NonZeroUsize, align: usize, _direction: DmaDirection, ) -> Result<DmaMapHandle, DmaError>

将虚拟地址映射到 DMA 地址

unsafe fn unmap_single(&self, _handle: DmaMapHandle)

解除 DMA 映射

unsafe fn alloc_coherent( &self, dma_mask: u64, layout: Layout, ) -> Option<DmaHandle>

分配 DMA 可访问内存

unsafe fn dealloc_coherent(&self, handle: DmaHandle)

释放 DMA 内存

fn flush(&self, addr: NonNull<u8>, size: usize)

写回缓存到内存 (clean)

fn invalidate(&self, addr: NonNull<u8>, size: usize)

使缓存无效 (invalidate)

fn flush_invalidate(&self, addr: NonNull<u8>, size: usize)

fn prepare_read( &self, handle: &DmaMapHandle, offset: usize, size: usize, direction: DmaDirection, )

fn confirm_write( &self, handle: &DmaMapHandle, offset: usize, size: usize, direction: DmaDirection, )