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/* exynos_drm.h
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *	Joonyoung Shim <jy0922.shim@samsung.com>
 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef _EXYNOS_DRM_H_
#define _EXYNOS_DRM_H_

#include "drm.h"

/**
 * User-desired buffer creation information structure.
 *
 * @size: user-desired memory allocation size.
 *	- this size value would be page-aligned internally.
 * @flags: user request for setting memory type or cache attributes.
 * @handle: returned a handle to created gem object.
 *	- this handle will be set by gem module of kernel side.
 */
struct drm_exynos_gem_create {
	uint64_t size;
	unsigned int flags;
	unsigned int handle;
};

/**
 * A structure for getting buffer offset.
 *
 * @handle: a pointer to gem object created.
 * @pad: just padding to be 64-bit aligned.
 * @offset: relatived offset value of the memory region allocated.
 *	- this value should be set by user.
 */
struct drm_exynos_gem_map_off {
	unsigned int handle;
	unsigned int pad;
	uint64_t offset;
};

/**
 * A structure for mapping buffer.
 *
 * @handle: a handle to gem object created.
 * @pad: just padding to be 64-bit aligned.
 * @size: memory size to be mapped.
 * @mapped: having user virtual address mmaped.
 *	- this variable would be filled by exynos gem module
 *	of kernel side with user virtual address which is allocated
 *	by do_mmap().
 */
struct drm_exynos_gem_mmap {
	unsigned int handle;
	unsigned int pad;
	uint64_t size;
	uint64_t mapped;
};

/**
 * A structure to gem information.
 *
 * @handle: a handle to gem object created.
 * @flags: flag value including memory type and cache attribute and
 *	this value would be set by driver.
 * @size: size to memory region allocated by gem and this size would
 *	be set by driver.
 */
struct drm_exynos_gem_info {
	unsigned int handle;
	unsigned int flags;
	uint64_t size;
};

/**
 * A structure for user connection request of virtual display.
 *
 * @connection: indicate whether doing connetion or not by user.
 * @extensions: if this value is 1 then the vidi driver would need additional
 *	128bytes edid data.
 * @edid: the edid data pointer from user side.
 */
struct drm_exynos_vidi_connection {
	unsigned int connection;
	unsigned int extensions;
	uint64_t edid;
};

/* memory type definitions. */
enum e_drm_exynos_gem_mem_type {
	/* Physically Continuous memory and used as default. */
	EXYNOS_BO_CONTIG	= 0 << 0,
	/* Physically Non-Continuous memory. */
	EXYNOS_BO_NONCONTIG	= 1 << 0,
	/* non-cachable mapping and used as default. */
	EXYNOS_BO_NONCACHABLE	= 0 << 1,
	/* cachable mapping. */
	EXYNOS_BO_CACHABLE	= 1 << 1,
	/* write-combine mapping. */
	EXYNOS_BO_WC		= 1 << 2,
	EXYNOS_BO_MASK		= EXYNOS_BO_NONCONTIG | EXYNOS_BO_CACHABLE |
					EXYNOS_BO_WC
};

#define DRM_EXYNOS_GEM_CREATE		0x00
#define DRM_EXYNOS_GEM_MAP_OFFSET	0x01
#define DRM_EXYNOS_GEM_MMAP		0x02
/* Reserved 0x04 ~ 0x05 for exynos specific gem ioctl */
#define DRM_EXYNOS_GEM_GET		0x04
#define DRM_EXYNOS_VIDI_CONNECTION	0x07

#define DRM_IOCTL_EXYNOS_GEM_CREATE		DRM_IOWR(DRM_COMMAND_BASE + \
		DRM_EXYNOS_GEM_CREATE, struct drm_exynos_gem_create)

#define DRM_IOCTL_EXYNOS_GEM_MAP_OFFSET	DRM_IOWR(DRM_COMMAND_BASE + \
		DRM_EXYNOS_GEM_MAP_OFFSET, struct drm_exynos_gem_map_off)

#define DRM_IOCTL_EXYNOS_GEM_MMAP	DRM_IOWR(DRM_COMMAND_BASE + \
		DRM_EXYNOS_GEM_MMAP, struct drm_exynos_gem_mmap)

#define DRM_IOCTL_EXYNOS_GEM_GET	DRM_IOWR(DRM_COMMAND_BASE + \
		DRM_EXYNOS_GEM_GET,	struct drm_exynos_gem_info)

#define DRM_IOCTL_EXYNOS_VIDI_CONNECTION	DRM_IOWR(DRM_COMMAND_BASE + \
		DRM_EXYNOS_VIDI_CONNECTION, struct drm_exynos_vidi_connection)

#endif