Struct Header 

pub struct Header {

    pub vendor_id: u16,
    pub device_id: u16,
    pub command: Command,
    pub status: Status<'P'>,
    pub revision_id: u8,
    pub class_code: ClassCode,
    pub cache_line_size: u8,
    pub latency_timer: u8,
    pub is_multi_function: bool,
    pub header_type: HeaderType,
    pub bist: BuiltInSelfTest,
    pub capabilities_pointer: u8,
    pub interrupt_line: u8,
    pub interrupt_pin: InterruptPin,
}

Main structure

Fields

vendor_id: u16

Identifies the manufacturer of the device. Where valid IDs are allocated by PCI-SIG to ensure uniqueness and 0xFFFF is an invalid value that will be returned on read accesses to Configuration Space registers of non-existent devices.

device_id: u16

Identifies the particular device. Where valid IDs are allocated by the vendor

command: Command

status: Status<'P'>

revision_id: u8

Device specific revision identifier.

class_code: ClassCode

cache_line_size: u8

Specifies the system cache line size in 32-bit units. A device can limit the number of cacheline sizes it can support, if a unsupported value is written to this field, the device will behave as if a value of 0 was written.

latency_timer: u8

Specifies the latency timer in units of PCI bus clocks.

is_multi_function: bool

Used to identify a multi-function device

header_type: HeaderType

bist: BuiltInSelfTest

capabilities_pointer: u8

Used to point to a linked list of new capabilities implemented by this device

interrupt_line: u8

Specifies which input of the system interrupt controllers the device’s interrupt pin is connected to and is implemented by any device that makes use of an interrupt pin. For the x86 architecture this register corresponds to the PIC IRQ numbers 0-15 (and not I/O APIC IRQ numbers) and a value of 0xFF defines no connection.

interrupt_pin: InterruptPin

Implementations

impl Header

pub const TOTAL_SIZE: usize = 0x40

Predefined header region is 64 bytes long

pub const COMMON_SIZE: usize = 0x10

The first 16 bytes are defined the same for all types of devices

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Header

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

Formats the value using the given formatter.

impl Eq for Header

impl From<[u8; 64]> for Header

fn from(bytes: [u8; 64]) -> Self

Converts to this type from the input type.

impl PartialEq for Header

fn eq(&self, other: &Header) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Header

impl TryFrom<&[u8]> for Header

type Error = TryFromSliceError

The type returned in the event of a conversion error.

fn try_from(slice: &[u8]) -> Result<Self, Self::Error>

Performs the conversion.