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  * 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_IOMMU_H_
  27 #define _EXYNOS_DRM_IOMMU_H_
  28
  29 #define EXYNOS_DEV_ADDR_START   0x20000000
  30 #define EXYNOS_DEV_ADDR_SIZE    0x40000000
  31 #define EXYNOS_DEV_ADDR_ORDER   0x4
  32
  33 #ifdef CONFIG_DRM_EXYNOS_IOMMU
  34
  35 int drm_create_iommu_mapping(struct drm_device *drm_dev);
  36
  37 void drm_release_iommu_mapping(struct drm_device *drm_dev);
  38
  39 int drm_iommu_attach_device(struct drm_device *drm_dev,
  40                                 struct device *subdrv_dev);
  41
  42 void drm_iommu_detach_device(struct drm_device *dev_dev,
  43                                 struct device *subdrv_dev);
  44
  45 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
  46 {
  47 #ifdef CONFIG_ARM_DMA_USE_IOMMU
  48         struct device *dev = drm_dev->dev;
  49
  50         return dev->archdata.mapping ? true : false;
  51 #else
  52         return false;
  53 #endif
  54 }
  55
  56 #else
  57
  58 struct dma_iommu_mapping;
  59 static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
  60 {
  61         return 0;
  62 }
  63
  64 static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
  65 {
  66 }
  67
  68 static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
  69                                                 struct device *subdrv_dev)
  70 {
  71         return 0;
  72 }
  73
  74 static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
  75                                                 struct device *subdrv_dev)
  76 {
  77 }
  78
  79 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
  80 {
  81         return false;
  82 }
  83
  84 #endif
  85 #endif