# VirtIOHeader in virtio_drivers - Rust
MMIO Device Legacy Register Interface.
Keywords: rust, rustlang, rust-lang, VirtIOHeader

# Struct virtio_drivers::VirtIOHeader

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    #[repr(C)]pub struct VirtIOHeader { /* private fields */ }

Expand description

MMIO Device Legacy Register Interface.

Ref: 4.2.4 Legacy interface

## Implementations

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### impl VirtIOHeader

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#### pub fn verify(&self) -> bool

Verify a valid header.

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#### pub fn device_type(&self) -> DeviceType

Get the device type.

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#### pub fn vendor_id(&self) -> u32

Get the vendor ID.

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#### pub fn begin_init(&mut self, negotiate_features: impl FnOnce(u64) -> u64)

Begin initializing the device.

Ref: virtio 3.1.1 Device Initialization

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#### pub fn finish_init(&mut self)

Finish initializing the device.

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#### pub fn queue_set(&mut self, queue: u32, size: u32, align: u32, pfn: u32)

Set queue.

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#### pub fn queue_physical_page_number(&mut self, queue: u32) -> u32

Get guest physical page number of the virtual queue.

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#### pub fn queue_used(&mut self, queue: u32) -> bool

Whether the queue is in used.

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#### pub fn max_queue_size(&self) -> u32

Get the max size of queue.

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#### pub fn notify(&mut self, queue: u32)

Notify device.

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#### pub fn ack_interrupt(&mut self) -> bool

Acknowledge interrupt and return true if success.

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#### pub fn config_space(&self) -> *mut u64

Get the pointer to config space (at offset 0x100)

## Auto Trait Implementations

### impl RefUnwindSafe for VirtIOHeader

### impl Send for VirtIOHeader

### impl Sync for VirtIOHeader

### impl Unpin for VirtIOHeader

### impl UnwindSafe for VirtIOHeader

## Blanket Implementations

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### impl<T> Any for T where
T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more

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### impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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### impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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### impl<T> From<T> for T

const: unstable · source

#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T, U> TryFrom<U> for T where
U: Into<T>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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### impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.