LXR linux/drivers/gpu/drm/exynos/exynos_drm

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