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

#ifndef NEW_KERNEL_BLOCKDEV_H
#define NEW_KERNEL_BLOCKDEV_H

#include <types.h>
#include <driver.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 uint8_t (*block_device_driver_check_device)(const block_device *device, uint8_t *first_sector);

typedef uint8_t (*block_device_driver_free)(const block_device *device);

typedef uint8_t (*block_device_access)(const block_device *device, uint8_t direction, uint32_t lba, uint8_t sectors, void *target);

struct block_dev_driver {
    char name[16];
    struct {
        uint8_t root_only: 1;
    } flags;
    block_device_driver_check_device check_device;
    block_device_driver_free free_device;
} __attribute__((__aligned__(STRUCT_ALIGNMENT)));

#define BLOCK_DEV_DRIVER(data...) GENERIC_DRIVER(block_dev_driver, data)

typedef struct block_device {
    struct {
        uint8_t present: 1;
        uint8_t scanned: 1;
        uint8_t unreadable: 1;
        uint8_t root_device: 1;
        uint8_t driver_installed: 1;
    } flags;
    char identifier[16];
    uint32_t num_lba;
    uint16_t block_size;
    block_device_access access;
    struct block_dev_driver *driver;
    void *device_info; // pointer to driver defined structure
    // todo device info
} block_device;

uint8_t block_dev_register(block_device *device);

void block_dev_free(block_device *device);

void block_dev_start_task();

void block_dev_print_info();

#endif //NEW_KERNEL_BLOCKDEV_H