/*
 * Copyright 2018-2020 Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		B Krishnan Iyer, krishnaniyer97@gmail.com
 *		Adrien Destugues, pulkomandy@pulkomandy.tk
 */
#ifndef _MMC_DISK_H
#define _MMC_DISK_H


#include <device_manager.h>
#include <KernelExport.h>

#include <stdint.h>

#include <mmc.h>

#include "IOSchedulerSimple.h"


enum MMCDiskFlags {
	kIoCommandOffsetAsSectors = 1,
		// IO commands use sector offsets instead of byte offsets
};


// This is the device info structure, allocated once per device
typedef struct {
	device_node* node;
	device_node* parent;
	void* parentCookie;
	mmc_device_interface* mmc;
	uint16_t rca;
	uint32_t flags;

	device_geometry geometry;

	DMAResource* dmaResource;
	IOScheduler* scheduler;

	off_t DeviceSize() const {
		return (off_t)geometry.bytes_per_sector * geometry.sectors_per_track
			* geometry.cylinder_count * geometry.head_count;
	}
} mmc_disk_driver_info;


// This is allocated once per open() call on the device (there can be multiple
// open file descriptors for the same device)
typedef struct {
	mmc_disk_driver_info* info;
} mmc_disk_handle;


#endif /*_MMC_DISK_H*/