Struct VirtioBlkDevice 

pub struct VirtioBlkDevice { /* private fields */ }

Virtio block device.

Manages a single virtio-blk PCI device with one request virtqueue (queue 0).

Implementations

impl VirtioBlkDevice

pub fn new(io_base: u16) -> Result<Self, KernelError>

Probe and initialize a virtio-blk device at the given PCI BAR0 I/O base.

Performs the full legacy virtio initialization sequence:

1. Reset + ACKNOWLEDGE + DRIVER
2. Read and negotiate features
3. Set up virtqueue 0 (request queue)
4. Set FEATURES_OK + DRIVER_OK
5. Read device configuration (capacity)

pub fn from_mmio( transport: VirtioMmioTransport, queue: VirtQueue, capacity_sectors: u64, read_only: bool, features: u32, ) -> Self

Construct from an MMIO transport + queue (used on AArch64/RISC-V).

pub fn capacity_sectors(&self) -> u64

Get device capacity in 512-byte sectors.

pub fn capacity_bytes(&self) -> u64

Get device capacity in bytes.

pub fn is_read_only(&self) -> bool

Check if the device is read-only.

pub fn read_block( &mut self, block_num: u64, buf: &mut [u8], ) -> Result<(), KernelError>

Read a single block (512 bytes) from the device.

block_num is the 0-based sector number. buf must be at least 512 bytes.

pub fn write_block( &mut self, block_num: u64, data: &[u8], ) -> Result<(), KernelError>

Write a single block (512 bytes) to the device.

block_num is the 0-based sector number. data must be at least 512 bytes.

Trait Implementations

impl BlockDevice for VirtioBlkDevice

fn read_block( &mut self, block_num: u64, buf: &mut [u8], ) -> Result<(), KernelError>

Read a block (512 bytes) at the given sector number.

fn write_block( &mut self, block_num: u64, data: &[u8], ) -> Result<(), KernelError>

Write a block (512 bytes) at the given sector number.

fn capacity_sectors(&self) -> u64

Get the device capacity in sectors.

fn is_read_only(&self) -> bool

Check if the device is read-only.

fn block_size(&self) -> usize

Get the block size in bytes.