drivers/gpu/drm/exynos/exynos_drm_iommu.h

   1 /* exynos_drm_iommu.h
   2  *
   3  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   4  * Authoer: Inki Dae <inki.dae@samsung.com>
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #ifndef _EXYNOS_DRM_IOMMU_H_
  13 #define _EXYNOS_DRM_IOMMU_H_
  14
  15 #define EXYNOS_DEV_ADDR_START   0x20000000
  16 #define EXYNOS_DEV_ADDR_SIZE    0x40000000
  17
  18 #ifdef CONFIG_DRM_EXYNOS_IOMMU
  19
  20 int drm_create_iommu_mapping(struct drm_device *drm_dev);
  21
  22 void drm_release_iommu_mapping(struct drm_device *drm_dev);
  23
  24 int drm_iommu_attach_device(struct drm_device *drm_dev,
  25                                 struct device *subdrv_dev);
  26
  27 void drm_iommu_detach_device(struct drm_device *dev_dev,
  28                                 struct device *subdrv_dev);
  29
  30 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
  31 {
  32         struct exynos_drm_private *priv = drm_dev->dev_private;
  33
  34         return priv->mapping ? true : false;
  35 }
  36
  37 #else
  38
  39 static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
  40 {
  41         return 0;
  42 }
  43
  44 static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
  45 {
  46 }
  47
  48 static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
  49                                                 struct device *subdrv_dev)
  50 {
  51         return 0;
  52 }
  53
  54 static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
  55                                                 struct device *subdrv_dev)
  56 {
  57 }
  58
  59 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
  60 {
  61         return false;
  62 }
  63
  64 #endif
  65 #endif