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exynos_drm_iommu.h revision 0519f9a12d0113caab78980c48a7902d2bd40c2c 
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
35int drm_create_iommu_mapping(struct drm_device *drm_dev);
36
37void drm_release_iommu_mapping(struct drm_device *drm_dev);
38
39int drm_iommu_attach_device(struct drm_device *drm_dev,
40				struct device *subdrv_dev);
41
42void drm_iommu_detach_device(struct drm_device *dev_dev,
43				struct device *subdrv_dev);
44
45static 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
58struct dma_iommu_mapping;
59static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
60{
61	return 0;
62}
63
64static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
65{
66}
67
68static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
69						struct device *subdrv_dev)
70{
71	return 0;
72}
73
74static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
75						struct device *subdrv_dev)
76{
77}
78
79static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
80{
81	return false;
82}
83
84#endif
85#endif
86