Struct CommandHeader 

#[repr(C)]
pub struct CommandHeader {
    pub flags_and_prdtl: u32,
    pub prdbc: u32,
    pub ctba_lo: u32,
    pub ctba_hi: u32,
    pub _reserved: [u32; 4],
}

Command Header (32 bytes, one per command slot).

The command list is an array of up to 32 command headers.

Fields

flags_and_prdtl: u32

DW0: Command FIS Length (bits 4:0, in DWORDs), ATAPI (bit 5), Write direction (bit 6), Prefetchable (bit 7), Reset (bit 8), BIST (bit 9), Clear Busy upon R_OK (bit 10), Reserved (bit 11), Port Multiplier Port (bits 15:12), PRDT Length (bits 31:16).

prdbc: u32

DW1: Physical Region Descriptor Byte Count (transferred so far).

ctba_lo: u32

DW2: Command Table Descriptor Base Address (lower 32 bits, 128-byte aligned).

ctba_hi: u32

DW3: Command Table Descriptor Base Address (upper 32 bits).

_reserved: [u32; 4]

DW4-7: Reserved.

Implementations

impl CommandHeader

pub fn new( fis_len_dwords: u8, prdt_count: u16, write: bool, ctba_phys: u64, ) -> Self

Create a new command header.

fis_len_dwords: Length of the command FIS in DWORDs (typically 5 for H2D FIS). prdt_count: Number of PRDT entries. write: True if this is a write (host-to-device data) command. ctba_phys: Physical address of the command table (128-byte aligned).

Trait Implementations

impl Clone for CommandHeader

fn clone(&self) -> CommandHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CommandHeader

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

Formats the value using the given formatter.

impl Copy for CommandHeader