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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#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
43struct dma_iommu_mapping;
44static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
45{
46	return 0;
47}
48
49static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
50{
51}
52
53static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
54						struct device *subdrv_dev)
55{
56	return 0;
57}
58
59static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
60						struct device *subdrv_dev)
61{
62}
63
64static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
65{
66	return false;
67}
68
69#endif
70#endif
71