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 #define EXYNOS_DEV_ADDR_ORDER   0x0
  18
  19 #ifdef CONFIG_DRM_EXYNOS_IOMMU
  20
  21 int drm_create_iommu_mapping(struct drm_device *drm_dev);
  22
  23 void drm_release_iommu_mapping(struct drm_device *drm_dev);
  24
  25 int drm_iommu_attach_device(struct drm_device *drm_dev,
  26                                 struct device *subdrv_dev);
  27
  28 void drm_iommu_detach_device(struct drm_device *dev_dev,
  29                                 struct device *subdrv_dev);
  30
  31 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
  32 {
  33 #ifdef CONFIG_ARM_DMA_USE_IOMMU
  34         struct device *dev = drm_dev->dev;
  35
  36         return dev->archdata.mapping ? true : false;
  37 #else
  38         return false;
  39 #endif
  40 }
  41
  42 #else
  43
  44 struct dma_iommu_mapping;
  45 static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
  46 {
  47         return 0;
  48 }
  49
  50 static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
  51 {
  52 }
  53
  54 static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
  55                                                 struct device *subdrv_dev)
  56 {
  57         return 0;
  58 }
  59
  60 static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
  61                                                 struct device *subdrv_dev)
  62 {
  63 }
  64
  65 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
  66 {
  67         return false;
  68 }
  69
  70 #endif
  71 #endif