ax-driver-block 0.3.14

Common traits and types for block storage drivers
Documentation 
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//! Common traits and types for block storage device drivers (i.e. disk).

#![no_std]
#![cfg_attr(doc, feature(doc_cfg))]

extern crate alloc;

#[cfg(test)]
extern crate std;

use alloc::boxed::Box;

#[cfg(feature = "bcm2835-sdhci")]
pub mod bcm2835sdhci;

#[cfg(feature = "cvsd")]
pub mod cvsd;

#[cfg(feature = "ramdisk")]
pub mod ramdisk;

#[cfg(feature = "ramdisk-static")]
pub mod ramdisk_static;

#[cfg(feature = "ahci")]
pub mod ahci;
pub mod partition;
#[cfg(feature = "sdmmc")]
pub mod sdmmc;

#[doc(no_inline)]
pub use ax_driver_base::{BaseDriverOps, DevError, DevResult, DeviceType};

/// Operations that require a block storage device driver to implement.
pub trait BlockDriverOps: BaseDriverOps {
    /// The number of blocks in this storage device.
    ///
    /// The total size of the device is `num_blocks() * block_size()`.
    fn num_blocks(&self) -> u64;
    /// The size of each block in bytes.
    fn block_size(&self) -> usize;

    /// Reads blocked data from the given block.
    ///
    /// The size of the buffer may exceed the block size, in which case multiple
    /// contiguous blocks will be read.
    fn read_block(&mut self, block_id: u64, buf: &mut [u8]) -> DevResult;

    /// Writes blocked data to the given block.
    ///
    /// The size of the buffer may exceed the block size, in which case multiple
    /// contiguous blocks will be written.
    fn write_block(&mut self, block_id: u64, buf: &[u8]) -> DevResult;

    /// Flushes the device to write all pending data to the storage.
    fn flush(&mut self) -> DevResult;
}

impl<T: BlockDriverOps + ?Sized> BlockDriverOps for Box<T> {
    fn num_blocks(&self) -> u64 {
        (**self).num_blocks()
    }

    fn block_size(&self) -> usize {
        (**self).block_size()
    }

    fn read_block(&mut self, block_id: u64, buf: &mut [u8]) -> DevResult {
        (**self).read_block(block_id, buf)
    }

    fn write_block(&mut self, block_id: u64, buf: &[u8]) -> DevResult {
        (**self).write_block(block_id, buf)
    }

    fn flush(&mut self) -> DevResult {
        (**self).flush()
    }
}