DragonOS/kernel/driver/disk/block_device.h

#pragma once

#include "../../common/glib.h"
#include "stdint.h"

struct block_device_operation
{
    long (*open)();
    long (*close)();
    long (*ioctl)(long cmd, long arg);
    long (*transfer)(long cmd, ul LBA_start, ul count, uint64_t buffer, uint8_t arg0, uint8_t arg1);
};

/**
 * @brief 块设备请求队列内的packet
 * 
 */
struct block_device_request_packet
{
    uchar cmd;
    uint64_t LBA_start;
    uint32_t count;
    uint64_t buffer_vaddr;

    uint8_t ahci_ctrl_num;  // ahci控制器号， 默认应为0
    uint8_t port_num;   // ahci的设备端口号
    void (*end_handler)(ul num, ul arg);

    struct List list;
};

/**
 * @brief 块设备的请求队列
 * 
 */
struct block_device_request_queue
{
    struct List queue_list;
    struct block_device_request_packet * in_service;    // 正在请求的结点
    ul request_count;
};