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 
is_drm_iommu_supported(struct drm_device * drm_dev)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 
drm_create_iommu_mapping(struct drm_device * drm_dev)43 static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
44 {
45 	return 0;
46 }
47 
drm_release_iommu_mapping(struct drm_device * drm_dev)48 static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
49 {
50 }
51 
drm_iommu_attach_device(struct drm_device * drm_dev,struct device * subdrv_dev)52 static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
53 						struct device *subdrv_dev)
54 {
55 	return 0;
56 }
57 
drm_iommu_detach_device(struct drm_device * drm_dev,struct device * subdrv_dev)58 static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
59 						struct device *subdrv_dev)
60 {
61 }
62 
is_drm_iommu_supported(struct drm_device * drm_dev)63 static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
64 {
65 	return false;
66 }
67 
68 #endif
69 #endif
70