Struct sunrise_ahci::hba::CmdTable

#[repr(C, align(4096))]pub struct CmdTable {
    cfis: Cfis,
    acmd: [Mmio<u8>; 16],
    _rsv: [Mmio<u8>; 48],
    prdt: [PrdtEntry; 248],
}

Command Table.

Each entry in the command list points to a structure called the command table. It can be found at PxCLB[i].CTBA.

See section 4.2.3

Fields

cfis: Cfis

acmd: [Mmio<u8>; 16]

_rsv: [Mmio<u8>; 48]

prdt: [PrdtEntry; 248]

Implementations

impl CmdTable

pub unsafe fn fill_prdt(
    &mut self,
    buffer: *const u8,
    length: usize,
    header: &mut CmdHeader
) -> Result<(), Error>

Fills a PRDT with the given buffer.

The buffer can be physically scattered, this function will query all its physical regions from the kernel.

When finished, this function will update the PRDTL count in header.

Unsafety

• buffer must point to valid memory.
• buffer[0] - buffer[len - 1] must fall in a single mapping.

Error

• AhciError::BufferTooScattered: buffer is so scattered it overflows PRDT.
• query_physical_address() failed.

Panics

• length must be even.
• buffer[0] must be the very start of the mapping.

Trait Implementations

impl ZeroInitialized for CmdTable