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 #ifdef CONFIG_ARM_DMA_USE_IOMMU
  33         struct device *dev = drm_dev->dev;
  34
  35         return dev->archdata.mapping ? true : false;
  36 #else
  37         return false;
  38 #endif
  39 }
  40
  41 #else
  42
  43 static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
  44 {
  45         return 0;
  46 }
  47
  48 static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
  49 {
  50 }
  51
  52 static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
  53                                                 struct device *subdrv_dev)
  54 {
  55         return 0;
  56 }
  57
  58 static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
  59                                                 struct device *subdrv_dev)
  60 {
  61 }
  62
  63 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
  64 {
  65         return false;
  66 }
  67
  68 #endif
  69 #endif