feat(storage): define storage device trait (#648)

* add storage device trait

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

* fix warings

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

* add get_namespaceid, get_blocksize

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

* fix namespace_id

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

* delete unnecessary comments

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

* fix add_storage_device

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

* separate trait and amanger

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

---------

Signed-off-by: Koichi <koichi.imai.2@tier4.jp>

Author: Koichi98

awkernel_lib/src/lib.rs

@@ -26,6 +26,7 @@ pub mod mmio;
 pub mod net;
 pub mod priority_queue;
 pub mod sanity;
+pub mod storage;
 pub mod sync;
 pub mod time;
 pub mod timer;

awkernel_lib/src/storage.rs

@@ -0,0 +1 @@
+pub mod storage_device;

awkernel_lib/src/storage/storage_device.rs

@@ -0,0 +1,46 @@
+use alloc::{borrow::Cow, vec::Vec};
+
+#[derive(Debug, Clone, Copy)]
+pub enum StorageDeviceType {
+    NVMe,
+    SATA,
+    USB,
+    VirtIO,
+    Memory,
+}
+
+#[derive(Debug)]
+pub enum StorageDevError {
+    IoError,
+    InvalidCommand,
+    DeviceNotReady,
+    InvalidBlock,
+    BufferTooSmall,
+    NotSupported,
+}
+
+pub trait StorageDevice: Send + Sync {
+    fn device_id(&self) -> u64;
+
+    fn device_name(&self) -> Cow<'static, str>;
+
+    fn device_short_name(&self) -> Cow<'static, str>;
+
+    fn device_type(&self) -> StorageDeviceType;
+
+    fn irqs(&self) -> Vec<u16>;
+
+    fn interrupt(&self, irq: u16) -> Result<(), StorageDevError>;
+
+    fn block_size(&self) -> usize;
+
+    fn num_blocks(&self) -> u64;
+
+    fn read_blocks(&self, buf: &mut [u8], transfer_id: u16) -> Result<(), StorageDevError>;
+
+    fn write_blocks(&self, buf: &[u8], transfer_id: u16) -> Result<(), StorageDevError>;
+
+    fn flush(&self, _transfer_id: u16) -> Result<(), StorageDevError> {
+        Ok(())
+    }
+}