drivers/gpu/drm/exynos/exynos_drm_buf.h

   1 /* exynos_drm_buf.h
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Author: Inki Dae <inki.dae@samsung.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #ifndef _EXYNOS_DRM_BUF_H_
  27 #define _EXYNOS_DRM_BUF_H_
  28
  29 /*
  30  * exynos drm buffer entry structure.
  31  *
  32  * @paddr: physical address of allocated memory.
  33  * @vaddr: kernel virtual address of allocated memory.
  34  * @size: size of allocated memory.
  35  */
  36 struct exynos_drm_buf_entry {
  37         dma_addr_t paddr;
  38         void __iomem *vaddr;
  39         unsigned int size;
  40 };
  41
  42 /* allocate physical memory. */
  43 struct exynos_drm_buf_entry *exynos_drm_buf_create(struct drm_device *dev,
  44                 unsigned int size);
  45
  46 /* get physical memory information of a drm framebuffer. */
  47 struct exynos_drm_buf_entry *exynos_drm_fb_get_buf(struct drm_framebuffer *fb);
  48
  49 /* remove allocated physical memory. */
  50 void exynos_drm_buf_destroy(struct drm_device *dev,
  51                 struct exynos_drm_buf_entry *entry);
  52
  53 #endif