Struct ScatterGatherList 

pub struct ScatterGatherList {
    pub entries: Vec<ScatterGatherEntry>,
    pub total_length: u64,
}

Scatter-gather list for multi-buffer DMA transfers.

Devices like NVMe and network NICs use scatter-gather to describe non-contiguous physical memory regions for a single logical transfer.

Fields

entries: Vec<ScatterGatherEntry>

Entries in the scatter-gather list.

total_length: u64

Total byte length across all entries.

Implementations

impl ScatterGatherList

pub fn new() -> Self

Create an empty scatter-gather list.

pub fn add_entry(&mut self, phys_addr: u64, length: u32)

Add a physical buffer segment to the scatter-gather list.

pub fn entry_count(&self) -> usize

Number of entries in the list.

Trait Implementations

impl Clone for ScatterGatherList

fn clone(&self) -> ScatterGatherList

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScatterGatherList

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ScatterGatherList

fn default() -> Self

Returns the “default value” for a type.