Struct HalImpl

pub struct HalImpl;

Implementations

impl HalImpl

pub fn init( dma_region_size: usize, dma_region_vaddr: usize, dma_region_paddr: usize, )

Trait Implementations

impl Hal for HalImpl

fn dma_alloc( pages: usize, _direction: BufferDirection, ) -> (PhysAddr, NonNull<u8>)

Allocates and zeroes the given number of contiguous physical pages of DMA memory for VirtIO use.

unsafe fn dma_dealloc(paddr: PhysAddr, _vaddr: NonNull<u8>, pages: usize) -> i32

Deallocates the given contiguous physical DMA memory pages.

unsafe fn mmio_phys_to_virt(_paddr: PhysAddr, _size: usize) -> NonNull<u8>

Converts a physical address used for MMIO to a virtual address which the driver can access.

unsafe fn share(buffer: NonNull<[u8]>, _direction: BufferDirection) -> PhysAddr

Shares the given memory range with the device, and returns the physical address that the device can use to access it.

unsafe fn unshare( paddr: PhysAddr, buffer: NonNull<[u8]>, direction: BufferDirection, )

Unshares the given memory range from the device and (if necessary) copies it back to the original buffer.