drivers/gpu/drm/exynos/exynos_drm_buf.h

/* exynos_drm_buf.h
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Author: Inki Dae <inki.dae@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_BUF_H_
#define _EXYNOS_DRM_BUF_H_

/*
 * exynos drm buffer entry structure.
 *
 * @paddr: physical address of allocated memory.
 * @vaddr: kernel virtual address of allocated memory.
 * @size: size of allocated memory.
 */
struct exynos_drm_buf_entry {
	dma_addr_t paddr;
	void __iomem *vaddr;
	unsigned int size;
};

/* allocate physical memory. */
struct exynos_drm_buf_entry *exynos_drm_buf_create(struct drm_device *dev,
		unsigned int size);

/* get physical memory information of a drm framebuffer. */
struct exynos_drm_buf_entry *exynos_drm_fb_get_buf(struct drm_framebuffer *fb);

/* remove allocated physical memory. */
void exynos_drm_buf_destroy(struct drm_device *dev,
		struct exynos_drm_buf_entry *entry);

#endif