virtio::blk::VirtioBlk< TransportT, VirtqueueT >::RequestSlot Struct Reference

异步请求上下文槽 More...

Collaboration diagram for virtio::blk::VirtioBlk< TransportT, VirtqueueT >::RequestSlot:

Public Attributes
BlkReqHeader	header
	请求头（DMA 可访问，设备只读）
volatile uint8_t	status
	状态字节（DMA 可访问，设备只写）
UserData	token
	用户自定义上下文指针
uint16_t	desc_head
	描述符链头索引（用于在 Used Ring 中匹配）

Detailed Description

template<typename TransportT = MmioTransport, typename VirtqueueT = SplitVirtqueue>
struct virtio::blk::VirtioBlk< TransportT, VirtqueueT >::RequestSlot

异步请求上下文槽

每个 in-flight 请求占用一个槽，存储请求头（DMA可访问）、 状态字节（设备回写）、用户 token 和描述符链头索引。 槽的占用状态由 slot_bitmap_ 管理。

Definition at line 523 of file virtio_blk.hpp.

Member Data Documentation

desc_head

template<typename TransportT = MmioTransport, typename VirtqueueT = SplitVirtqueue>

uint16_t virtio::blk::VirtioBlk< TransportT, VirtqueueT >::RequestSlot::desc_head

描述符链头索引（用于在 Used Ring 中匹配）

Definition at line 531 of file virtio_blk.hpp.

header

template<typename TransportT = MmioTransport, typename VirtqueueT = SplitVirtqueue>

BlkReqHeader virtio::blk::VirtioBlk< TransportT, VirtqueueT >::RequestSlot::header

请求头（DMA 可访问，设备只读）

Definition at line 525 of file virtio_blk.hpp.

status

template<typename TransportT = MmioTransport, typename VirtqueueT = SplitVirtqueue>

volatile uint8_t virtio::blk::VirtioBlk< TransportT, VirtqueueT >::RequestSlot::status

状态字节（DMA 可访问，设备只写）

Definition at line 527 of file virtio_blk.hpp.

token

template<typename TransportT = MmioTransport, typename VirtqueueT = SplitVirtqueue>

UserData virtio::blk::VirtioBlk< TransportT, VirtqueueT >::RequestSlot::token

用户自定义上下文指针

Definition at line 529 of file virtio_blk.hpp.

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The documentation for this struct was generated from the following file:

• /workspaces/SimpleKernel/src/device/virtio/device/blk/virtio_blk.hpp