//
// Created by rick on 06-02-21.
//

#ifndef NEW_KERNEL_BLOCKDEV_H
#define NEW_KERNEL_BLOCKDEV_H

#include <types.h>

#define BLOCK_DEV_ACCESS_OK  0
#define BLOCK_DEV_ACCESS_ERR 1

#define BLOCK_DEV_DIRECTION_READ    0
#define BLOCK_DEV_DIRECTION_WRITE   1

#define BLOCK_DEV_DRIVER_CHECK_OK       0
#define BLOCK_DEV_DRIVER_CHECK_NO_MATCH 1

#define BLOCK_DEV_REGISTER_DRIVER_OK 0
#define BLOCK_DEV_REGISTER_DRIVER_FULL 1

#define BLOCK_DEV_REGISTER_OK 0
#define BLOCK_DEV_REGISTER_FULL 1


typedef struct block_device block_device;

typedef u8 (*block_device_driver_check_device)(const block_device *device, u8 *first_sector);

typedef u8 (*block_device_driver_free)(const block_device *device);

typedef u8 (*block_device_access)(const block_device *device, u8 direction, u32 lba, u8 sectors, void *target);


typedef struct {
    char name[16];
    struct {
        u8 root_only: 1;
    } flags;
    block_device_driver_check_device check_device;
    block_device_driver_free free_device;
} block_dev_driver;

typedef struct block_device {
    struct {
        u8 present: 1;
        u8 scanned: 1;
        u8 unreadable: 1;
        u8 root_device: 1;
        u8 driver_installed: 1;
    } flags;
    char identifier[16];
    u32 num_lba;
    u16 block_size;
    block_device_access access;
    block_dev_driver *driver;
    void *device_info; // pointer to driver defined structure
    // todo device info
} block_device;

u8 block_dev_register_driver(block_dev_driver *driver);

u8 block_dev_register(block_device *device);

void block_dev_free(block_device *device);

void block_dev_scan_repeat();

void block_dev_print_info();

#endif //NEW_KERNEL_BLOCKDEV_H