Struct BuffConfig 

pub struct BuffConfig {
    pub dma_mask: u64,
    pub align: usize,
    pub size: usize,
}

Configuration for DMA buffer allocation.

This structure specifies the requirements for DMA buffers used in block device operations. The configuration ensures that buffers meet the hardware’s alignment and addressing constraints.

Fields

dma_mask: u64

DMA addressing mask for the device.

This mask defines the addressable memory range for DMA operations. For example, a 32-bit device would use 0xFFFFFFFF.

align: usize

Required alignment for buffer addresses.

Buffers must be aligned to this boundary (in bytes) for optimal performance and hardware compatibility. Common values are 512 or 4096.

size: usize

Size of each buffer in bytes.

This typically matches the device’s block size to ensure efficient data transfer and avoid partial block operations.