Struct DmaBuffer 

pub struct DmaBuffer {
    pub physical_addr: u64,
    pub virtual_addr: u64,
    pub size: usize,
}

DMA-capable buffer

Fields

physical_addr: u64

Physical address (for DMA)

virtual_addr: u64

Virtual address (for CPU access)

size: usize

Buffer size

Implementations

impl DmaBuffer

pub fn new(size: usize) -> Result<Self, KernelError>

Create new DMA buffer by allocating a physical frame.

Allocates a frame from the frame allocator and maps it via the kernel’s direct physical memory mapping. The frame provides at least size bytes of DMA-capable memory.

pub fn as_mut_slice(&mut self) -> &mut [u8]

Get mutable slice

pub fn as_slice(&self) -> &[u8]

Get immutable slice