Module dma_pool 

DMA Buffer Pool for Zero-Copy Networking

Provides pre-allocated DMA-capable buffers for network packet transmission and reception, enabling zero-copy operation with minimal allocation overhead.

Buffers are allocated from physical frames below 4GB for 32-bit DMA compatibility. Each buffer gets one 4KB frame; the usable portion is DMA_BUFFER_SIZE (2048 bytes) to accommodate network MTU + headers.

Structs

DmaBuffer

DMA Buffer

DmaBufferPool

DMA Buffer Pool

DmaPoolStats

DMA Pool Statistics

Constants

DMA_BUFFER_SIZE

Standard network buffer size (1500 MTU + headers + alignment)

MAX_BUFFERS

Maximum number of buffers in the pool

Functions

init_network_pool

Initialize the global network DMA pool

with_network_pool

Execute a closure with the global network DMA pool (mutable access)