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exynos_drm_iommu.h revision d81aecb5e680311e1f3fd71e49e6a4072d2374d2 
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	0x4
18
19#ifdef CONFIG_DRM_EXYNOS_IOMMU
20
21int drm_create_iommu_mapping(struct drm_device *drm_dev);
22
23void drm_release_iommu_mapping(struct drm_device *drm_dev);
24
25int drm_iommu_attach_device(struct drm_device *drm_dev,
26				struct device *subdrv_dev);
27
28void drm_iommu_detach_device(struct drm_device *dev_dev,
29				struct device *subdrv_dev);
30
31static 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
44struct dma_iommu_mapping;
45static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
46{
47	return 0;
48}
49
50static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
51{
52}
53
54static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
55						struct device *subdrv_dev)
56{
57	return 0;
58}
59
60static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
61						struct device *subdrv_dev)
62{
63}
64
65static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
66{
67	return false;
68}
69
70#endif
71#endif
72