tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
41int drm_iommu_attach_device_if_possible(
42 struct exynos_drm_crtc *exynos_crtc, struct drm_device *drm_dev,
43 struct device *subdrv_dev);
44
45#else
46
47static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
48{
49 return 0;
50}
51
52static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
53{
54}
55
56static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
57 struct device *subdrv_dev)
58{
59 return 0;
60}
61
62static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
63 struct device *subdrv_dev)
64{
65}
66
67static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
68{
69 return false;
70}
71
72static inline int drm_iommu_attach_device_if_possible(
73 struct exynos_drm_crtc *exynos_crtc, struct drm_device *drm_dev,
74 struct device *subdrv_dev)
75{
76 return 0;
77}
78
79#endif
80#endif